diff --git a/Makefile b/Makefile
index 6965c80..7a99ad4 100644
--- a/Makefile
+++ b/Makefile
@@ -13,18 +13,28 @@
 # limitations under the License.
 #
 # SPDX-License-Identifier: Apache-2.0
+MAKEFLAGS+=--warn-undefined-variables
 
-CARAVEL_ROOT?=$(PWD)/caravel
+export CARAVEL_ROOT?=$(PWD)/caravel
 PRECHECK_ROOT?=${HOME}/mpw_precheck
-SIM ?= RTL
+export MCW_ROOT?=$(PWD)/mgmt_core_wrapper
+SIM?=RTL
 
-export OPEN_PDKS_COMMIT?=41c0908b47130d5675ff8484255b43f66463a7d6
-export PDK=sky130B
-export PDKPATH?=$(PDK_ROOT)/$(PDK)
 # Install lite version of caravel, (1): caravel-lite, (0): caravel
 CARAVEL_LITE?=1
 
-MPW_TAG ?= mpw-7a
+# PDK switch varient
+export PDK?=sky130A
+#export PDK?=gf180mcuC
+export PDKPATH?=$(PDK_ROOT)/$(PDK)
+
+
+
+ifeq ($(PDK),sky130A)
+	SKYWATER_COMMIT=f70d8ca46961ff92719d8870a18a076370b85f6c
+	export OPEN_PDKS_COMMIT?=0059588eebfc704681dc2368bd1d33d96281d10f
+	export OPENLANE_TAG?=2022.11.19
+	MPW_TAG ?= mpw-8a
 
 ifeq ($(CARAVEL_LITE),1)
 	CARAVEL_NAME := caravel-lite
@@ -36,55 +46,157 @@
 	CARAVEL_TAG := $(MPW_TAG)
 endif
 
+endif
+
+ifeq ($(PDK),sky130B)
+	SKYWATER_COMMIT=f70d8ca46961ff92719d8870a18a076370b85f6c
+	export OPEN_PDKS_COMMIT?=0059588eebfc704681dc2368bd1d33d96281d10f
+	export OPENLANE_TAG?=2022.11.19
+	MPW_TAG ?= mpw-8a
+
+ifeq ($(CARAVEL_LITE),1)
+	CARAVEL_NAME := caravel-lite
+	CARAVEL_REPO := https://github.com/efabless/caravel-lite
+	CARAVEL_TAG := $(MPW_TAG)
+else
+	CARAVEL_NAME := caravel
+	CARAVEL_REPO := https://github.com/efabless/caravel
+	CARAVEL_TAG := $(MPW_TAG)
+endif
+
+endif
+
+ifeq ($(PDK),gf180mcuC)
+
+	MPW_TAG ?= gfmpw-0a
+	CARAVEL_NAME := caravel
+	CARAVEL_REPO := https://github.com/efabless/caravel-gf180mcu
+	CARAVEL_TAG := $(MPW_TAG)
+	#OPENLANE_TAG=ddfeab57e3e8769ea3d40dda12be0460e09bb6d9
+	export OPEN_PDKS_COMMIT?=0059588eebfc704681dc2368bd1d33d96281d10f
+	export OPENLANE_TAG?=2022.11.19
+
+endif
+
 # Include Caravel Makefile Targets
 .PHONY: % : check-caravel
-%: 
+%:
 	export CARAVEL_ROOT=$(CARAVEL_ROOT) && $(MAKE) -f $(CARAVEL_ROOT)/Makefile $@
 
-# Verify Target for running simulations
-.PHONY: verify
-verify:
-	cd ./verilog/dv/ && \
-	export SIM=${SIM} && \
-		$(MAKE) -j$(THREADS)
+.PHONY: install
+install:
+	if [ -d "$(CARAVEL_ROOT)" ]; then\
+		echo "Deleting exisiting $(CARAVEL_ROOT)" && \
+		rm -rf $(CARAVEL_ROOT) && sleep 2;\
+	fi
+	echo "Installing $(CARAVEL_NAME).."
+	git clone -b $(CARAVEL_TAG) $(CARAVEL_REPO) $(CARAVEL_ROOT) --depth=1
 
 # Install DV setup
 .PHONY: simenv
 simenv:
-	docker pull efabless/dv_setup:latest
+	docker pull efabless/dv:latest
 
-PATTERNS=$(shell cd verilog/dv && find * -maxdepth 0 -type d)
-DV_PATTERNS = $(foreach dv, $(PATTERNS), verify-$(dv))
+.PHONY: setup
+setup: install check-env install_mcw openlane pdk-with-volare setup-timing-scripts
+
+# Openlane
+blocks=$(shell cd openlane && find * -maxdepth 0 -type d)
+.PHONY: $(blocks)
+$(blocks): % :
+	$(MAKE) -C openlane $*
+
+dv_patterns=$(shell cd verilog/dv && find * -maxdepth 0 -type d)
+dv-targets-rtl=$(dv_patterns:%=verify-%-rtl)
+dv-targets-gl=$(dv_patterns:%=verify-%-gl)
+dv-targets-gl-sdf=$(dv_patterns:%=verify-%-gl-sdf)
+
 TARGET_PATH=$(shell pwd)
-VERIFY_COMMAND="cd ${TARGET_PATH}/verilog/dv/$* && export SIM=${SIM} && make"
-$(DV_PATTERNS): verify-% : ./verilog/dv/% 
+verify_command="source ~/.bashrc && cd ${TARGET_PATH}/verilog/dv/$* && export SIM=${SIM} && make"
+dv_base_dependencies=simenv
+docker_run_verify=\
 	docker run -v ${TARGET_PATH}:${TARGET_PATH} -v ${PDK_ROOT}:${PDK_ROOT} \
-                -v ${CARAVEL_ROOT}:${CARAVEL_ROOT} \
-                -e TARGET_PATH=${TARGET_PATH} -e PDK_ROOT=${PDK_ROOT} \
-                -e CARAVEL_ROOT=${CARAVEL_ROOT} \
-                -u $(id -u $$USER):$(id -g $$USER) efabless/dv_setup:latest \
-                sh -c $(VERIFY_COMMAND)
-				
-# Openlane Makefile Targets
-BLOCKS = $(shell cd openlane && find * -maxdepth 0 -type d)
-.PHONY: $(BLOCKS)
-$(BLOCKS): %:
-	cd openlane && $(MAKE) $*
+		-v ${CARAVEL_ROOT}:${CARAVEL_ROOT} \
+		-e TARGET_PATH=${TARGET_PATH} -e PDK_ROOT=${PDK_ROOT} \
+		-e CARAVEL_ROOT=${CARAVEL_ROOT} \
+		-e TOOLS=/foss/tools/riscv-gnu-toolchain-rv32i/217e7f3debe424d61374d31e33a091a630535937 \
+		-e DESIGNS=$(TARGET_PATH) \
+		-e USER_PROJECT_VERILOG=$(TARGET_PATH)/verilog \
+		-e PDK=$(PDK) \
+		-e CORE_VERILOG_PATH=$(TARGET_PATH)/mgmt_core_wrapper/verilog \
+		-e CARAVEL_VERILOG_PATH=$(TARGET_PATH)/caravel/verilog \
+		-e MCW_ROOT=$(MCW_ROOT) \
+		-u $$(id -u $$USER):$$(id -g $$USER) efabless/dv:latest \
+		sh -c $(verify_command)
 
-# Install caravel
-.PHONY: install
-install:
-	@echo "Installing $(CARAVEL_NAME).."
-	@git clone -b $(CARAVEL_TAG) $(CARAVEL_REPO) $(CARAVEL_ROOT)
+.PHONY: harden
+harden: $(blocks)
+
+.PHONY: verify
+verify: $(dv-targets-rtl)
+
+.PHONY: verify-all-rtl
+verify-all-rtl: $(dv-targets-rtl)
+
+.PHONY: verify-all-gl
+verify-all-gl: $(dv-targets-gl)
+
+.PHONY: verify-all-gl-sdf
+verify-all-gl-sdf: $(dv-targets-gl-sdf)
+
+$(dv-targets-rtl): SIM=RTL
+$(dv-targets-rtl): verify-%-rtl: $(dv_base_dependencies)
+	$(docker_run_verify)
+
+$(dv-targets-gl): SIM=GL
+$(dv-targets-gl): verify-%-gl: $(dv_base_dependencies)
+	$(docker_run_verify)
+
+$(dv-targets-gl-sdf): SIM=GL_SDF
+$(dv-targets-gl-sdf): verify-%-gl-sdf: $(dv_base_dependencies)
+	$(docker_run_verify)
+
+clean-targets=$(blocks:%=clean-%)
+.PHONY: $(clean-targets)
+$(clean-targets): clean-% :
+	rm -f ./verilog/gl/$*.v
+	rm -f ./spef/$*.spef
+	rm -f ./sdc/$*.sdc
+	rm -f ./sdf/$*.sdf
+	rm -f ./gds/$*.gds
+	rm -f ./mag/$*.mag
+	rm -f ./lef/$*.lef
+	rm -f ./maglef/*.maglef
+
+make_what=setup $(blocks) $(dv-targets-rtl) $(dv-targets-gl) $(dv-targets-gl-sdf) $(clean-targets)
+.PHONY: what
+what:
+	# $(make_what)
+
+# Install Openlane
+.PHONY: openlane
+openlane:
+	@if [ "$$(realpath $${OPENLANE_ROOT})" = "$$(realpath $$(pwd)/openlane)" ]; then\
+		echo "OPENLANE_ROOT is set to '$$(pwd)/openlane' which contains openlane config files"; \
+		echo "Please set it to a different directory"; \
+		exit 1; \
+	fi
+	cd openlane && $(MAKE) openlane
+
+#### Not sure if the targets following are of any use
 
 # Create symbolic links to caravel's main files
 .PHONY: simlink
 simlink: check-caravel
-### Symbolic links relative path to $CARAVEL_ROOT 
+### Symbolic links relative path to $CARAVEL_ROOT
 	$(eval MAKEFILE_PATH := $(shell realpath --relative-to=openlane $(CARAVEL_ROOT)/openlane/Makefile))
+	$(eval PIN_CFG_PATH  := $(shell realpath --relative-to=openlane/user_project_wrapper $(CARAVEL_ROOT)/openlane/user_project_wrapper_empty/pin_order.cfg))
 	mkdir -p openlane
+	mkdir -p openlane/user_project_wrapper
 	cd openlane &&\
 	ln -sf $(MAKEFILE_PATH) Makefile
+	cd openlane/user_project_wrapper &&\
+	ln -sf $(PIN_CFG_PATH) pin_order.cfg
 
 # Update Caravel
 .PHONY: update_caravel
@@ -93,13 +205,9 @@
 
 # Uninstall Caravel
 .PHONY: uninstall
-uninstall: 
+uninstall:
 	rm -rf $(CARAVEL_ROOT)
 
-# Install Openlane
-.PHONY: openlane
-openlane: 
-	cd openlane && $(MAKE) openlane
 
 # Install Pre-check
 # Default installs to the user home directory, override by "export PRECHECK_ROOT=<precheck-installation-path>"
@@ -122,7 +230,8 @@
 	-u $(shell id -u $(USER)):$(shell id -g $(USER)) \
 	efabless/mpw_precheck:latest bash -c "cd $(PRECHECK_ROOT) ; python3 mpw_precheck.py --input_directory $(INPUT_DIRECTORY) --pdk_path $(PDK_ROOT)/$(PDK)"
 
-# Clean 
+
+
 .PHONY: clean
 clean:
 	cd ./verilog/dv/ && \
@@ -148,5 +257,68 @@
 
 .PHONY: help
 help:
-	cd $(CARAVEL_ROOT) && $(MAKE) help 
+	cd $(CARAVEL_ROOT) && $(MAKE) help
 	@$(MAKE) -pRrq -f $(lastword $(MAKEFILE_LIST)) : 2>/dev/null | awk -v RS= -F: '/^# File/,/^# Finished Make data base/ {if ($$1 !~ "^[#.]") {print $$1}}' | sort | egrep -v -e '^[^[:alnum:]]' -e '^$@$$'
+
+
+export CUP_ROOT=$(shell pwd)
+export TIMING_ROOT?=$(shell pwd)/deps/timing-scripts
+export PROJECT_ROOT=$(CUP_ROOT)
+timing-scripts-repo=https://github.com/efabless/timing-scripts.git
+
+$(TIMING_ROOT):
+	@mkdir -p $(CUP_ROOT)/deps
+	@git clone $(timing-scripts-repo) $(TIMING_ROOT)
+
+.PHONY: setup-timing-scripts
+setup-timing-scripts: $(TIMING_ROOT)
+	@( cd $(TIMING_ROOT) && git pull )
+	@#( cd $(TIMING_ROOT) && git fetch && git checkout $(MPW_TAG); )
+	@python3 -m venv ./venv 
+		. ./venv/bin/activate && \
+		python3 -m pip install --upgrade pip && \
+		python3 -m pip install -r $(TIMING_ROOT)/requirements.txt && \
+		deactivate
+
+./verilog/gl/user_project_wrapper.v:
+	$(error you don't have $@)
+
+./env/spef-mapping.tcl: 
+	@echo "run the following:"
+	@echo "make extract-parasitics"
+	@echo "make create-spef-mapping"
+	exit 1
+
+.PHONY: create-spef-mapping
+create-spef-mapping: ./verilog/gl/user_project_wrapper.v
+	@. ./venv/bin/activate && \
+		python3 $(TIMING_ROOT)/scripts/generate_spef_mapping.py \
+			-i ./verilog/gl/user_project_wrapper.v \
+			-o ./env/spef-mapping.tcl \
+			--pdk-path $(PDK_ROOT)/$(PDK) \
+			--macro-parent mprj \
+			--project-root "$(CUP_ROOT)" && \
+		deactivate
+
+.PHONY: extract-parasitics
+extract-parasitics: ./verilog/gl/user_project_wrapper.v
+	@. ./venv/bin/activate && \
+		python3 $(TIMING_ROOT)/scripts/get_macros.py \
+		-i ./verilog/gl/user_project_wrapper.v \
+		-o ./tmp-macros-list \
+		--project-root "$(CUP_ROOT)" \
+		--pdk-path $(PDK_ROOT)/$(PDK) && \
+		deactivate
+		@cat ./tmp-macros-list | cut -d " " -f2 \
+			| xargs -I % bash -c "$(MAKE) -C $(TIMING_ROOT) \
+				-f $(TIMING_ROOT)/timing.mk rcx-% || echo 'Cannot extract %. Probably no def for this macro'"
+	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk rcx-user_project_wrapper
+	@cat ./tmp-macros-list
+	@rm ./tmp-macros-list
+	
+.PHONY: caravel-sta
+caravel-sta: ./env/spef-mapping.tcl
+	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk caravel-timing-typ
+	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk caravel-timing-fast
+	@$(MAKE) -C $(TIMING_ROOT) -f $(TIMING_ROOT)/timing.mk caravel-timing-slow
+	@echo "You can find results for all corners in $(CUP_ROOT)/signoff/caravel/openlane-signoff/timing/"
diff --git a/caravel b/caravel
index de98d51..d2b96d7 160000
--- a/caravel
+++ b/caravel
@@ -1 +1 @@
-Subproject commit de98d514aa6c642ef020876a64c4cdb2c9ea9a8a
+Subproject commit d2b96d7206208c9dcd721c44798bf2e5da8f8ad1
diff --git a/deps/timing-scripts b/deps/timing-scripts
new file mode 160000
index 0000000..5aae69b
--- /dev/null
+++ b/deps/timing-scripts
@@ -0,0 +1 @@
+Subproject commit 5aae69b4cfa571094bb10cd973dd91e1665cc581
diff --git a/mag/user_analog_project_wrapper.mag b/mag/user_analog_project_wrapper.mag
index d723827..a2d627f 100644
--- a/mag/user_analog_project_wrapper.mag
+++ b/mag/user_analog_project_wrapper.mag
@@ -1,7 +1,7 @@
 magic
 tech sky130B
 magscale 1 2
-timestamp 1662330820
+timestamp 1669077252
 << locali >>
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 rect 513448 44321 513850 44391
@@ -1256,12 +1256,14 @@
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+rect 483717 4124 484037 10157
+rect 549470 10133 549838 10157
 rect 554778 6289 555098 46705
 rect 558324 45717 558644 114254
 rect 561870 116606 562190 219970
@@ -8813,6 +8871,10 @@
 rect 572484 6321 572852 6345
 rect 568938 6051 569306 6075
 rect 561846 5841 562214 5865
+rect 42632 3804 42656 4124
+rect 42976 3804 486547 4124
+rect 42632 3780 43000 3804
+rect 483717 3516 484037 3804
 << comment >>
 rect -100 704000 584100 704100
 rect -100 0 0 704000
@@ -8875,8 +8937,6 @@
 port 8 nsew signal bidirectional
 flabel metal3 s 583520 313652 584800 313764 0 FreeSans 1120 0 0 0 gpio_analog[1]
 port 9 nsew signal bidirectional
-flabel metal3 s 583520 358874 584800 358986 0 FreeSans 1120 0 0 0 gpio_analog[2]
-port 10 nsew signal bidirectional
 flabel metal3 s 583520 405296 584800 405408 0 FreeSans 1120 0 0 0 gpio_analog[3]
 port 11 nsew signal bidirectional
 flabel metal3 s 583520 449718 584800 449830 0 FreeSans 1120 0 0 0 gpio_analog[4]
@@ -8993,8 +9053,6 @@
 port 55 nsew signal bidirectional
 flabel metal3 s 583520 2726 584800 2838 0 FreeSans 1120 0 0 0 io_in[0]
 port 56 nsew signal input
-flabel metal3 s 583520 408842 584800 408954 0 FreeSans 1120 0 0 0 io_in[10]
-port 57 nsew signal input
 flabel metal3 s 583520 453264 584800 453376 0 FreeSans 1120 0 0 0 io_in[11]
 port 58 nsew signal input
 flabel metal3 s 583520 497686 584800 497798 0 FreeSans 1120 0 0 0 io_in[12]
@@ -10253,6 +10311,10 @@
 port 571 nsew signal bidirectional
 flabel metal2 s 547790 -800 547902 480 0 FreeSans 1120 90 0 0 la_data_in[119]
 port 185 nsew signal input
+flabel metal3 s 583520 358874 584800 358986 0 FreeSans 1120 0 0 0 gpio_analog[2]
+port 10 nsew signal bidirectional
+flabel metal3 s 583520 408842 584800 408954 0 FreeSans 1120 0 0 0 io_in[10]
+port 57 nsew signal input
 << properties >>
 string FIXED_BBOX 0 0 584000 704000
 << end >>
diff --git a/mgmt_core_wrapper b/mgmt_core_wrapper
new file mode 160000
index 0000000..dc4c190
--- /dev/null
+++ b/mgmt_core_wrapper
@@ -0,0 +1 @@
+Subproject commit dc4c190cd1e35301837d1c719fef213d8d00f4e1
diff --git a/venv/bin/Activate.ps1 b/venv/bin/Activate.ps1
new file mode 100644
index 0000000..2fb3852
--- /dev/null
+++ b/venv/bin/Activate.ps1
@@ -0,0 +1,241 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+https://go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virutal environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"
diff --git a/venv/bin/activate b/venv/bin/activate
new file mode 100644
index 0000000..2fef21e
--- /dev/null
+++ b/venv/bin/activate
@@ -0,0 +1,66 @@
+# This file must be used with "source bin/activate" *from bash*
+# you cannot run it directly
+
+deactivate () {
+    # reset old environment variables
+    if [ -n "${_OLD_VIRTUAL_PATH:-}" ] ; then
+        PATH="${_OLD_VIRTUAL_PATH:-}"
+        export PATH
+        unset _OLD_VIRTUAL_PATH
+    fi
+    if [ -n "${_OLD_VIRTUAL_PYTHONHOME:-}" ] ; then
+        PYTHONHOME="${_OLD_VIRTUAL_PYTHONHOME:-}"
+        export PYTHONHOME
+        unset _OLD_VIRTUAL_PYTHONHOME
+    fi
+
+    # This should detect bash and zsh, which have a hash command that must
+    # be called to get it to forget past commands.  Without forgetting
+    # past commands the $PATH changes we made may not be respected
+    if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+        hash -r 2> /dev/null
+    fi
+
+    if [ -n "${_OLD_VIRTUAL_PS1:-}" ] ; then
+        PS1="${_OLD_VIRTUAL_PS1:-}"
+        export PS1
+        unset _OLD_VIRTUAL_PS1
+    fi
+
+    unset VIRTUAL_ENV
+    if [ ! "${1:-}" = "nondestructive" ] ; then
+    # Self destruct!
+        unset -f deactivate
+    fi
+}
+
+# unset irrelevant variables
+deactivate nondestructive
+
+VIRTUAL_ENV="/home/hni/TopmetalSe-DPS/venv"
+export VIRTUAL_ENV
+
+_OLD_VIRTUAL_PATH="$PATH"
+PATH="$VIRTUAL_ENV/bin:$PATH"
+export PATH
+
+# unset PYTHONHOME if set
+# this will fail if PYTHONHOME is set to the empty string (which is bad anyway)
+# could use `if (set -u; : $PYTHONHOME) ;` in bash
+if [ -n "${PYTHONHOME:-}" ] ; then
+    _OLD_VIRTUAL_PYTHONHOME="${PYTHONHOME:-}"
+    unset PYTHONHOME
+fi
+
+if [ -z "${VIRTUAL_ENV_DISABLE_PROMPT:-}" ] ; then
+    _OLD_VIRTUAL_PS1="${PS1:-}"
+    PS1="(venv) ${PS1:-}"
+    export PS1
+fi
+
+# This should detect bash and zsh, which have a hash command that must
+# be called to get it to forget past commands.  Without forgetting
+# past commands the $PATH changes we made may not be respected
+if [ -n "${BASH:-}" -o -n "${ZSH_VERSION:-}" ] ; then
+    hash -r 2> /dev/null
+fi
diff --git a/venv/bin/activate.csh b/venv/bin/activate.csh
new file mode 100644
index 0000000..c2965b1
--- /dev/null
+++ b/venv/bin/activate.csh
@@ -0,0 +1,25 @@
+# This file must be used with "source bin/activate.csh" *from csh*.
+# You cannot run it directly.
+# Created by Davide Di Blasi <davidedb@gmail.com>.
+# Ported to Python 3.3 venv by Andrew Svetlov <andrew.svetlov@gmail.com>
+
+alias deactivate 'test $?_OLD_VIRTUAL_PATH != 0 && setenv PATH "$_OLD_VIRTUAL_PATH" && unset _OLD_VIRTUAL_PATH; rehash; test $?_OLD_VIRTUAL_PROMPT != 0 && set prompt="$_OLD_VIRTUAL_PROMPT" && unset _OLD_VIRTUAL_PROMPT; unsetenv VIRTUAL_ENV; test "\!:*" != "nondestructive" && unalias deactivate'
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+setenv VIRTUAL_ENV "/home/hni/TopmetalSe-DPS/venv"
+
+set _OLD_VIRTUAL_PATH="$PATH"
+setenv PATH "$VIRTUAL_ENV/bin:$PATH"
+
+
+set _OLD_VIRTUAL_PROMPT="$prompt"
+
+if (! "$?VIRTUAL_ENV_DISABLE_PROMPT") then
+    set prompt = "(venv) $prompt"
+endif
+
+alias pydoc python -m pydoc
+
+rehash
diff --git a/venv/bin/activate.fish b/venv/bin/activate.fish
new file mode 100644
index 0000000..028294e
--- /dev/null
+++ b/venv/bin/activate.fish
@@ -0,0 +1,64 @@
+# This file must be used with "source <venv>/bin/activate.fish" *from fish*
+# (https://fishshell.com/); you cannot run it directly.
+
+function deactivate  -d "Exit virtual environment and return to normal shell environment"
+    # reset old environment variables
+    if test -n "$_OLD_VIRTUAL_PATH"
+        set -gx PATH $_OLD_VIRTUAL_PATH
+        set -e _OLD_VIRTUAL_PATH
+    end
+    if test -n "$_OLD_VIRTUAL_PYTHONHOME"
+        set -gx PYTHONHOME $_OLD_VIRTUAL_PYTHONHOME
+        set -e _OLD_VIRTUAL_PYTHONHOME
+    end
+
+    if test -n "$_OLD_FISH_PROMPT_OVERRIDE"
+        functions -e fish_prompt
+        set -e _OLD_FISH_PROMPT_OVERRIDE
+        functions -c _old_fish_prompt fish_prompt
+        functions -e _old_fish_prompt
+    end
+
+    set -e VIRTUAL_ENV
+    if test "$argv[1]" != "nondestructive"
+        # Self-destruct!
+        functions -e deactivate
+    end
+end
+
+# Unset irrelevant variables.
+deactivate nondestructive
+
+set -gx VIRTUAL_ENV "/home/hni/TopmetalSe-DPS/venv"
+
+set -gx _OLD_VIRTUAL_PATH $PATH
+set -gx PATH "$VIRTUAL_ENV/bin" $PATH
+
+# Unset PYTHONHOME if set.
+if set -q PYTHONHOME
+    set -gx _OLD_VIRTUAL_PYTHONHOME $PYTHONHOME
+    set -e PYTHONHOME
+end
+
+if test -z "$VIRTUAL_ENV_DISABLE_PROMPT"
+    # fish uses a function instead of an env var to generate the prompt.
+
+    # Save the current fish_prompt function as the function _old_fish_prompt.
+    functions -c fish_prompt _old_fish_prompt
+
+    # With the original prompt function renamed, we can override with our own.
+    function fish_prompt
+        # Save the return status of the last command.
+        set -l old_status $status
+
+        # Output the venv prompt; color taken from the blue of the Python logo.
+        printf "%s%s%s" (set_color 4B8BBE) "(venv) " (set_color normal)
+
+        # Restore the return status of the previous command.
+        echo "exit $old_status" | .
+        # Output the original/"old" prompt.
+        _old_fish_prompt
+    end
+
+    set -gx _OLD_FISH_PROMPT_OVERRIDE "$VIRTUAL_ENV"
+end
diff --git a/venv/bin/easy_install b/venv/bin/easy_install
new file mode 100755
index 0000000..b9cf288
--- /dev/null
+++ b/venv/bin/easy_install
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from setuptools.command.easy_install import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/easy_install-3.9 b/venv/bin/easy_install-3.9
new file mode 100755
index 0000000..b9cf288
--- /dev/null
+++ b/venv/bin/easy_install-3.9
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from setuptools.command.easy_install import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/pip b/venv/bin/pip
new file mode 100755
index 0000000..8c00378
--- /dev/null
+++ b/venv/bin/pip
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/pip3 b/venv/bin/pip3
new file mode 100755
index 0000000..8c00378
--- /dev/null
+++ b/venv/bin/pip3
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/pip3.10 b/venv/bin/pip3.10
new file mode 100755
index 0000000..8c00378
--- /dev/null
+++ b/venv/bin/pip3.10
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/pip3.9 b/venv/bin/pip3.9
new file mode 100755
index 0000000..8c00378
--- /dev/null
+++ b/venv/bin/pip3.9
@@ -0,0 +1,8 @@
+#!/home/hni/TopmetalSe-DPS/venv/bin/python3
+# -*- coding: utf-8 -*-
+import re
+import sys
+from pip._internal.cli.main import main
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(main())
diff --git a/venv/bin/python b/venv/bin/python
new file mode 120000
index 0000000..b8a0adb
--- /dev/null
+++ b/venv/bin/python
@@ -0,0 +1 @@
+python3
\ No newline at end of file
diff --git a/venv/bin/python3 b/venv/bin/python3
new file mode 120000
index 0000000..b48b94c
--- /dev/null
+++ b/venv/bin/python3
@@ -0,0 +1 @@
+/opt/OpenICEDA/OICvenv/bin/python3
\ No newline at end of file
diff --git a/venv/bin/python3.9 b/venv/bin/python3.9
new file mode 120000
index 0000000..b8a0adb
--- /dev/null
+++ b/venv/bin/python3.9
@@ -0,0 +1 @@
+python3
\ No newline at end of file
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/LICENSE.rst b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/LICENSE.rst
new file mode 100644
index 0000000..c37cae4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2007 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/METADATA b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/METADATA
new file mode 100644
index 0000000..f54bb5c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/METADATA
@@ -0,0 +1,113 @@
+Metadata-Version: 2.1
+Name: Jinja2
+Version: 3.1.2
+Summary: A very fast and expressive template engine.
+Home-page: https://palletsprojects.com/p/jinja/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Donate, https://palletsprojects.com/donate
+Project-URL: Documentation, https://jinja.palletsprojects.com/
+Project-URL: Changes, https://jinja.palletsprojects.com/changes/
+Project-URL: Source Code, https://github.com/pallets/jinja/
+Project-URL: Issue Tracker, https://github.com/pallets/jinja/issues/
+Project-URL: Twitter, https://twitter.com/PalletsTeam
+Project-URL: Chat, https://discord.gg/pallets
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=3.7
+Description-Content-Type: text/x-rst
+License-File: LICENSE.rst
+Requires-Dist: MarkupSafe (>=2.0)
+Provides-Extra: i18n
+Requires-Dist: Babel (>=2.7) ; extra == 'i18n'
+
+Jinja
+=====
+
+Jinja is a fast, expressive, extensible templating engine. Special
+placeholders in the template allow writing code similar to Python
+syntax. Then the template is passed data to render the final document.
+
+It includes:
+
+-   Template inheritance and inclusion.
+-   Define and import macros within templates.
+-   HTML templates can use autoescaping to prevent XSS from untrusted
+    user input.
+-   A sandboxed environment can safely render untrusted templates.
+-   AsyncIO support for generating templates and calling async
+    functions.
+-   I18N support with Babel.
+-   Templates are compiled to optimized Python code just-in-time and
+    cached, or can be compiled ahead-of-time.
+-   Exceptions point to the correct line in templates to make debugging
+    easier.
+-   Extensible filters, tests, functions, and even syntax.
+
+Jinja's philosophy is that while application logic belongs in Python if
+possible, it shouldn't make the template designer's job difficult by
+restricting functionality too much.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U Jinja2
+
+.. _pip: https://pip.pypa.io/en/stable/getting-started/
+
+
+In A Nutshell
+-------------
+
+.. code-block:: jinja
+
+    {% extends "base.html" %}
+    {% block title %}Members{% endblock %}
+    {% block content %}
+      <ul>
+      {% for user in users %}
+        <li><a href="{{ user.url }}">{{ user.username }}</a></li>
+      {% endfor %}
+      </ul>
+    {% endblock %}
+
+
+Donate
+------
+
+The Pallets organization develops and supports Jinja and other popular
+packages. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+-   Documentation: https://jinja.palletsprojects.com/
+-   Changes: https://jinja.palletsprojects.com/changes/
+-   PyPI Releases: https://pypi.org/project/Jinja2/
+-   Source Code: https://github.com/pallets/jinja/
+-   Issue Tracker: https://github.com/pallets/jinja/issues/
+-   Website: https://palletsprojects.com/p/jinja/
+-   Twitter: https://twitter.com/PalletsTeam
+-   Chat: https://discord.gg/pallets
+
+
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/RECORD b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/RECORD
new file mode 100644
index 0000000..24b49f1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/RECORD
@@ -0,0 +1,58 @@
+Jinja2-3.1.2.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+Jinja2-3.1.2.dist-info/LICENSE.rst,sha256=O0nc7kEF6ze6wQ-vG-JgQI_oXSUrjp3y4JefweCUQ3s,1475
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diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/WHEEL b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/WHEEL
new file mode 100644
index 0000000..becc9a6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.1)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/entry_points.txt b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/entry_points.txt
new file mode 100644
index 0000000..7b9666c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/entry_points.txt
@@ -0,0 +1,2 @@
+[babel.extractors]
+jinja2 = jinja2.ext:babel_extract[i18n]
diff --git a/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/top_level.txt
new file mode 100644
index 0000000..7f7afbf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/Jinja2-3.1.2.dist-info/top_level.txt
@@ -0,0 +1 @@
+jinja2
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/LICENSE.rst b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/LICENSE.rst
new file mode 100644
index 0000000..9d227a0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2010 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/METADATA b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/METADATA
new file mode 100644
index 0000000..485a5e0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/METADATA
@@ -0,0 +1,101 @@
+Metadata-Version: 2.1
+Name: MarkupSafe
+Version: 2.1.1
+Summary: Safely add untrusted strings to HTML/XML markup.
+Home-page: https://palletsprojects.com/p/markupsafe/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Donate, https://palletsprojects.com/donate
+Project-URL: Documentation, https://markupsafe.palletsprojects.com/
+Project-URL: Changes, https://markupsafe.palletsprojects.com/changes/
+Project-URL: Source Code, https://github.com/pallets/markupsafe/
+Project-URL: Issue Tracker, https://github.com/pallets/markupsafe/issues/
+Project-URL: Twitter, https://twitter.com/PalletsTeam
+Project-URL: Chat, https://discord.gg/pallets
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Environment :: Web Environment
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Classifier: Topic :: Internet :: WWW/HTTP :: Dynamic Content
+Classifier: Topic :: Text Processing :: Markup :: HTML
+Requires-Python: >=3.7
+Description-Content-Type: text/x-rst
+License-File: LICENSE.rst
+
+MarkupSafe
+==========
+
+MarkupSafe implements a text object that escapes characters so it is
+safe to use in HTML and XML. Characters that have special meanings are
+replaced so that they display as the actual characters. This mitigates
+injection attacks, meaning untrusted user input can safely be displayed
+on a page.
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    pip install -U MarkupSafe
+
+.. _pip: https://pip.pypa.io/en/stable/getting-started/
+
+
+Examples
+--------
+
+.. code-block:: pycon
+
+    >>> from markupsafe import Markup, escape
+
+    >>> # escape replaces special characters and wraps in Markup
+    >>> escape("<script>alert(document.cookie);</script>")
+    Markup('&lt;script&gt;alert(document.cookie);&lt;/script&gt;')
+
+    >>> # wrap in Markup to mark text "safe" and prevent escaping
+    >>> Markup("<strong>Hello</strong>")
+    Markup('<strong>hello</strong>')
+
+    >>> escape(Markup("<strong>Hello</strong>"))
+    Markup('<strong>hello</strong>')
+
+    >>> # Markup is a str subclass
+    >>> # methods and operators escape their arguments
+    >>> template = Markup("Hello <em>{name}</em>")
+    >>> template.format(name='"World"')
+    Markup('Hello <em>&#34;World&#34;</em>')
+
+
+Donate
+------
+
+The Pallets organization develops and supports MarkupSafe and other
+popular packages. In order to grow the community of contributors and
+users, and allow the maintainers to devote more time to the projects,
+`please donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+-   Documentation: https://markupsafe.palletsprojects.com/
+-   Changes: https://markupsafe.palletsprojects.com/changes/
+-   PyPI Releases: https://pypi.org/project/MarkupSafe/
+-   Source Code: https://github.com/pallets/markupsafe/
+-   Issue Tracker: https://github.com/pallets/markupsafe/issues/
+-   Website: https://palletsprojects.com/p/markupsafe/
+-   Twitter: https://twitter.com/PalletsTeam
+-   Chat: https://discord.gg/pallets
+
+
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/RECORD b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/RECORD
new file mode 100644
index 0000000..4fdcfc2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/RECORD
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+MarkupSafe-2.1.1.dist-info/LICENSE.rst,sha256=SJqOEQhQntmKN7uYPhHg9-HTHwvY-Zp5yESOf_N9B-o,1475
+MarkupSafe-2.1.1.dist-info/METADATA,sha256=DC93VszmzjLQcrVChRUjtW4XbUwjTdbaplpgdlbFdbs,3242
+MarkupSafe-2.1.1.dist-info/RECORD,,
+MarkupSafe-2.1.1.dist-info/WHEEL,sha256=ts1NGDem03kTrzsJp50lKy9cpDxDoGil0Q-wLa_TR_0,148
+MarkupSafe-2.1.1.dist-info/top_level.txt,sha256=qy0Plje5IJuvsCBjejJyhDCjEAdcDLK_2agVcex8Z6U,11
+markupsafe/__init__.py,sha256=xfaUQkKNRTdYWe6HnnJ2HjguFmS-C_0H6g8-Q9VAfkQ,9284
+markupsafe/__pycache__/__init__.cpython-39.pyc,,
+markupsafe/__pycache__/_native.cpython-39.pyc,,
+markupsafe/_native.py,sha256=GR86Qvo_GcgKmKreA1WmYN9ud17OFwkww8E-fiW-57s,1713
+markupsafe/_speedups.c,sha256=X2XvQVtIdcK4Usz70BvkzoOfjTCmQlDkkjYSn-swE0g,7083
+markupsafe/_speedups.cpython-39-x86_64-linux-gnu.so,sha256=DCWkK-C94Ojd4_RrL6I_91Jl0DsomXQ8XdhfOpXhKxo,44008
+markupsafe/_speedups.pyi,sha256=vfMCsOgbAXRNLUXkyuyonG8uEWKYU4PDqNuMaDELAYw,229
+markupsafe/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/WHEEL b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/WHEEL
new file mode 100644
index 0000000..ade3730
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.0)
+Root-Is-Purelib: false
+Tag: cp39-cp39-manylinux_2_17_x86_64
+Tag: cp39-cp39-manylinux2014_x86_64
+
diff --git a/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/top_level.txt
new file mode 100644
index 0000000..75bf729
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/MarkupSafe-2.1.1.dist-info/top_level.txt
@@ -0,0 +1 @@
+markupsafe
diff --git a/venv/lib/python3.9/site-packages/__pycache__/easy_install.cpython-39.pyc b/venv/lib/python3.9/site-packages/__pycache__/easy_install.cpython-39.pyc
new file mode 100644
index 0000000..e344f99
--- /dev/null
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Binary files differ
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/LICENSE.rst b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/LICENSE.rst
new file mode 100644
index 0000000..d12a849
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/LICENSE.rst
@@ -0,0 +1,28 @@
+Copyright 2014 Pallets
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1.  Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+2.  Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+3.  Neither the name of the copyright holder nor the names of its
+    contributors may be used to endorse or promote products derived from
+    this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/METADATA b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/METADATA
new file mode 100644
index 0000000..8e5dc1e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/METADATA
@@ -0,0 +1,111 @@
+Metadata-Version: 2.1
+Name: click
+Version: 8.1.3
+Summary: Composable command line interface toolkit
+Home-page: https://palletsprojects.com/p/click/
+Author: Armin Ronacher
+Author-email: armin.ronacher@active-4.com
+Maintainer: Pallets
+Maintainer-email: contact@palletsprojects.com
+License: BSD-3-Clause
+Project-URL: Donate, https://palletsprojects.com/donate
+Project-URL: Documentation, https://click.palletsprojects.com/
+Project-URL: Changes, https://click.palletsprojects.com/changes/
+Project-URL: Source Code, https://github.com/pallets/click/
+Project-URL: Issue Tracker, https://github.com/pallets/click/issues/
+Project-URL: Twitter, https://twitter.com/PalletsTeam
+Project-URL: Chat, https://discord.gg/pallets
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: BSD License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python
+Requires-Python: >=3.7
+Description-Content-Type: text/x-rst
+License-File: LICENSE.rst
+Requires-Dist: colorama ; platform_system == "Windows"
+Requires-Dist: importlib-metadata ; python_version < "3.8"
+
+\$ click\_
+==========
+
+Click is a Python package for creating beautiful command line interfaces
+in a composable way with as little code as necessary. It's the "Command
+Line Interface Creation Kit". It's highly configurable but comes with
+sensible defaults out of the box.
+
+It aims to make the process of writing command line tools quick and fun
+while also preventing any frustration caused by the inability to
+implement an intended CLI API.
+
+Click in three points:
+
+-   Arbitrary nesting of commands
+-   Automatic help page generation
+-   Supports lazy loading of subcommands at runtime
+
+
+Installing
+----------
+
+Install and update using `pip`_:
+
+.. code-block:: text
+
+    $ pip install -U click
+
+.. _pip: https://pip.pypa.io/en/stable/getting-started/
+
+
+A Simple Example
+----------------
+
+.. code-block:: python
+
+    import click
+
+    @click.command()
+    @click.option("--count", default=1, help="Number of greetings.")
+    @click.option("--name", prompt="Your name", help="The person to greet.")
+    def hello(count, name):
+        """Simple program that greets NAME for a total of COUNT times."""
+        for _ in range(count):
+            click.echo(f"Hello, {name}!")
+
+    if __name__ == '__main__':
+        hello()
+
+.. code-block:: text
+
+    $ python hello.py --count=3
+    Your name: Click
+    Hello, Click!
+    Hello, Click!
+    Hello, Click!
+
+
+Donate
+------
+
+The Pallets organization develops and supports Click and other popular
+packages. In order to grow the community of contributors and users, and
+allow the maintainers to devote more time to the projects, `please
+donate today`_.
+
+.. _please donate today: https://palletsprojects.com/donate
+
+
+Links
+-----
+
+-   Documentation: https://click.palletsprojects.com/
+-   Changes: https://click.palletsprojects.com/changes/
+-   PyPI Releases: https://pypi.org/project/click/
+-   Source Code: https://github.com/pallets/click
+-   Issue Tracker: https://github.com/pallets/click/issues
+-   Website: https://palletsprojects.com/p/click
+-   Twitter: https://twitter.com/PalletsTeam
+-   Chat: https://discord.gg/pallets
+
+
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/RECORD b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/RECORD
new file mode 100644
index 0000000..3e2aae0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/RECORD
@@ -0,0 +1,40 @@
+click-8.1.3.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+click-8.1.3.dist-info/LICENSE.rst,sha256=morRBqOU6FO_4h9C9OctWSgZoigF2ZG18ydQKSkrZY0,1475
+click-8.1.3.dist-info/METADATA,sha256=tFJIX5lOjx7c5LjZbdTPFVDJSgyv9F74XY0XCPp_gnc,3247
+click-8.1.3.dist-info/RECORD,,
+click-8.1.3.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+click-8.1.3.dist-info/WHEEL,sha256=G16H4A3IeoQmnOrYV4ueZGKSjhipXx8zc8nu9FGlvMA,92
+click-8.1.3.dist-info/top_level.txt,sha256=J1ZQogalYS4pphY_lPECoNMfw0HzTSrZglC4Yfwo4xA,6
+click/__init__.py,sha256=rQBLutqg-z6m8nOzivIfigDn_emijB_dKv9BZ2FNi5s,3138
+click/__pycache__/__init__.cpython-39.pyc,,
+click/__pycache__/_compat.cpython-39.pyc,,
+click/__pycache__/_termui_impl.cpython-39.pyc,,
+click/__pycache__/_textwrap.cpython-39.pyc,,
+click/__pycache__/_winconsole.cpython-39.pyc,,
+click/__pycache__/core.cpython-39.pyc,,
+click/__pycache__/decorators.cpython-39.pyc,,
+click/__pycache__/exceptions.cpython-39.pyc,,
+click/__pycache__/formatting.cpython-39.pyc,,
+click/__pycache__/globals.cpython-39.pyc,,
+click/__pycache__/parser.cpython-39.pyc,,
+click/__pycache__/shell_completion.cpython-39.pyc,,
+click/__pycache__/termui.cpython-39.pyc,,
+click/__pycache__/testing.cpython-39.pyc,,
+click/__pycache__/types.cpython-39.pyc,,
+click/__pycache__/utils.cpython-39.pyc,,
+click/_compat.py,sha256=JIHLYs7Jzz4KT9t-ds4o4jBzLjnwCiJQKqur-5iwCKI,18810
+click/_termui_impl.py,sha256=qK6Cfy4mRFxvxE8dya8RBhLpSC8HjF-lvBc6aNrPdwg,23451
+click/_textwrap.py,sha256=10fQ64OcBUMuK7mFvh8363_uoOxPlRItZBmKzRJDgoY,1353
+click/_winconsole.py,sha256=5ju3jQkcZD0W27WEMGqmEP4y_crUVzPCqsX_FYb7BO0,7860
+click/core.py,sha256=mz87bYEKzIoNYEa56BFAiOJnvt1Y0L-i7wD4_ZecieE,112782
+click/decorators.py,sha256=yo3zvzgUm5q7h5CXjyV6q3h_PJAiUaem178zXwdWUFI,16350
+click/exceptions.py,sha256=7gDaLGuFZBeCNwY9ERMsF2-Z3R9Fvq09Zc6IZSKjseo,9167
+click/formatting.py,sha256=Frf0-5W33-loyY_i9qrwXR8-STnW3m5gvyxLVUdyxyk,9706
+click/globals.py,sha256=TP-qM88STzc7f127h35TD_v920FgfOD2EwzqA0oE8XU,1961
+click/parser.py,sha256=cAEt1uQR8gq3-S9ysqbVU-fdAZNvilxw4ReJ_T1OQMk,19044
+click/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+click/shell_completion.py,sha256=qOp_BeC9esEOSZKyu5G7RIxEUaLsXUX-mTb7hB1r4QY,18018
+click/termui.py,sha256=ACBQVOvFCTSqtD5VREeCAdRtlHd-Imla-Lte4wSfMjA,28355
+click/testing.py,sha256=ptpMYgRY7dVfE3UDgkgwayu9ePw98sQI3D7zZXiCpj4,16063
+click/types.py,sha256=rEb1aZSQKq3ciCMmjpG2Uva9vk498XRL7ThrcK2GRss,35805
+click/utils.py,sha256=33D6E7poH_nrKB-xr-UyDEXnxOcCiQqxuRLtrqeVv6o,18682
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/REQUESTED b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/REQUESTED
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/REQUESTED
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/WHEEL b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/WHEEL
new file mode 100644
index 0000000..becc9a6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.1)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/top_level.txt
new file mode 100644
index 0000000..dca9a90
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click-8.1.3.dist-info/top_level.txt
@@ -0,0 +1 @@
+click
diff --git a/venv/lib/python3.9/site-packages/click/__init__.py b/venv/lib/python3.9/site-packages/click/__init__.py
new file mode 100644
index 0000000..e3ef423
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/__init__.py
@@ -0,0 +1,73 @@
+"""
+Click is a simple Python module inspired by the stdlib optparse to make
+writing command line scripts fun. Unlike other modules, it's based
+around a simple API that does not come with too much magic and is
+composable.
+"""
+from .core import Argument as Argument
+from .core import BaseCommand as BaseCommand
+from .core import Command as Command
+from .core import CommandCollection as CommandCollection
+from .core import Context as Context
+from .core import Group as Group
+from .core import MultiCommand as MultiCommand
+from .core import Option as Option
+from .core import Parameter as Parameter
+from .decorators import argument as argument
+from .decorators import command as command
+from .decorators import confirmation_option as confirmation_option
+from .decorators import group as group
+from .decorators import help_option as help_option
+from .decorators import make_pass_decorator as make_pass_decorator
+from .decorators import option as option
+from .decorators import pass_context as pass_context
+from .decorators import pass_obj as pass_obj
+from .decorators import password_option as password_option
+from .decorators import version_option as version_option
+from .exceptions import Abort as Abort
+from .exceptions import BadArgumentUsage as BadArgumentUsage
+from .exceptions import BadOptionUsage as BadOptionUsage
+from .exceptions import BadParameter as BadParameter
+from .exceptions import ClickException as ClickException
+from .exceptions import FileError as FileError
+from .exceptions import MissingParameter as MissingParameter
+from .exceptions import NoSuchOption as NoSuchOption
+from .exceptions import UsageError as UsageError
+from .formatting import HelpFormatter as HelpFormatter
+from .formatting import wrap_text as wrap_text
+from .globals import get_current_context as get_current_context
+from .parser import OptionParser as OptionParser
+from .termui import clear as clear
+from .termui import confirm as confirm
+from .termui import echo_via_pager as echo_via_pager
+from .termui import edit as edit
+from .termui import getchar as getchar
+from .termui import launch as launch
+from .termui import pause as pause
+from .termui import progressbar as progressbar
+from .termui import prompt as prompt
+from .termui import secho as secho
+from .termui import style as style
+from .termui import unstyle as unstyle
+from .types import BOOL as BOOL
+from .types import Choice as Choice
+from .types import DateTime as DateTime
+from .types import File as File
+from .types import FLOAT as FLOAT
+from .types import FloatRange as FloatRange
+from .types import INT as INT
+from .types import IntRange as IntRange
+from .types import ParamType as ParamType
+from .types import Path as Path
+from .types import STRING as STRING
+from .types import Tuple as Tuple
+from .types import UNPROCESSED as UNPROCESSED
+from .types import UUID as UUID
+from .utils import echo as echo
+from .utils import format_filename as format_filename
+from .utils import get_app_dir as get_app_dir
+from .utils import get_binary_stream as get_binary_stream
+from .utils import get_text_stream as get_text_stream
+from .utils import open_file as open_file
+
+__version__ = "8.1.3"
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diff --git a/venv/lib/python3.9/site-packages/click/__pycache__/utils.cpython-39.pyc b/venv/lib/python3.9/site-packages/click/__pycache__/utils.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/click/_compat.py b/venv/lib/python3.9/site-packages/click/_compat.py
new file mode 100644
index 0000000..766d286
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/_compat.py
@@ -0,0 +1,626 @@
+import codecs
+import io
+import os
+import re
+import sys
+import typing as t
+from weakref import WeakKeyDictionary
+
+CYGWIN = sys.platform.startswith("cygwin")
+MSYS2 = sys.platform.startswith("win") and ("GCC" in sys.version)
+# Determine local App Engine environment, per Google's own suggestion
+APP_ENGINE = "APPENGINE_RUNTIME" in os.environ and "Development/" in os.environ.get(
+    "SERVER_SOFTWARE", ""
+)
+WIN = sys.platform.startswith("win") and not APP_ENGINE and not MSYS2
+auto_wrap_for_ansi: t.Optional[t.Callable[[t.TextIO], t.TextIO]] = None
+_ansi_re = re.compile(r"\033\[[;?0-9]*[a-zA-Z]")
+
+
+def get_filesystem_encoding() -> str:
+    return sys.getfilesystemencoding() or sys.getdefaultencoding()
+
+
+def _make_text_stream(
+    stream: t.BinaryIO,
+    encoding: t.Optional[str],
+    errors: t.Optional[str],
+    force_readable: bool = False,
+    force_writable: bool = False,
+) -> t.TextIO:
+    if encoding is None:
+        encoding = get_best_encoding(stream)
+    if errors is None:
+        errors = "replace"
+    return _NonClosingTextIOWrapper(
+        stream,
+        encoding,
+        errors,
+        line_buffering=True,
+        force_readable=force_readable,
+        force_writable=force_writable,
+    )
+
+
+def is_ascii_encoding(encoding: str) -> bool:
+    """Checks if a given encoding is ascii."""
+    try:
+        return codecs.lookup(encoding).name == "ascii"
+    except LookupError:
+        return False
+
+
+def get_best_encoding(stream: t.IO) -> str:
+    """Returns the default stream encoding if not found."""
+    rv = getattr(stream, "encoding", None) or sys.getdefaultencoding()
+    if is_ascii_encoding(rv):
+        return "utf-8"
+    return rv
+
+
+class _NonClosingTextIOWrapper(io.TextIOWrapper):
+    def __init__(
+        self,
+        stream: t.BinaryIO,
+        encoding: t.Optional[str],
+        errors: t.Optional[str],
+        force_readable: bool = False,
+        force_writable: bool = False,
+        **extra: t.Any,
+    ) -> None:
+        self._stream = stream = t.cast(
+            t.BinaryIO, _FixupStream(stream, force_readable, force_writable)
+        )
+        super().__init__(stream, encoding, errors, **extra)
+
+    def __del__(self) -> None:
+        try:
+            self.detach()
+        except Exception:
+            pass
+
+    def isatty(self) -> bool:
+        # https://bitbucket.org/pypy/pypy/issue/1803
+        return self._stream.isatty()
+
+
+class _FixupStream:
+    """The new io interface needs more from streams than streams
+    traditionally implement.  As such, this fix-up code is necessary in
+    some circumstances.
+
+    The forcing of readable and writable flags are there because some tools
+    put badly patched objects on sys (one such offender are certain version
+    of jupyter notebook).
+    """
+
+    def __init__(
+        self,
+        stream: t.BinaryIO,
+        force_readable: bool = False,
+        force_writable: bool = False,
+    ):
+        self._stream = stream
+        self._force_readable = force_readable
+        self._force_writable = force_writable
+
+    def __getattr__(self, name: str) -> t.Any:
+        return getattr(self._stream, name)
+
+    def read1(self, size: int) -> bytes:
+        f = getattr(self._stream, "read1", None)
+
+        if f is not None:
+            return t.cast(bytes, f(size))
+
+        return self._stream.read(size)
+
+    def readable(self) -> bool:
+        if self._force_readable:
+            return True
+        x = getattr(self._stream, "readable", None)
+        if x is not None:
+            return t.cast(bool, x())
+        try:
+            self._stream.read(0)
+        except Exception:
+            return False
+        return True
+
+    def writable(self) -> bool:
+        if self._force_writable:
+            return True
+        x = getattr(self._stream, "writable", None)
+        if x is not None:
+            return t.cast(bool, x())
+        try:
+            self._stream.write("")  # type: ignore
+        except Exception:
+            try:
+                self._stream.write(b"")
+            except Exception:
+                return False
+        return True
+
+    def seekable(self) -> bool:
+        x = getattr(self._stream, "seekable", None)
+        if x is not None:
+            return t.cast(bool, x())
+        try:
+            self._stream.seek(self._stream.tell())
+        except Exception:
+            return False
+        return True
+
+
+def _is_binary_reader(stream: t.IO, default: bool = False) -> bool:
+    try:
+        return isinstance(stream.read(0), bytes)
+    except Exception:
+        return default
+        # This happens in some cases where the stream was already
+        # closed.  In this case, we assume the default.
+
+
+def _is_binary_writer(stream: t.IO, default: bool = False) -> bool:
+    try:
+        stream.write(b"")
+    except Exception:
+        try:
+            stream.write("")
+            return False
+        except Exception:
+            pass
+        return default
+    return True
+
+
+def _find_binary_reader(stream: t.IO) -> t.Optional[t.BinaryIO]:
+    # We need to figure out if the given stream is already binary.
+    # This can happen because the official docs recommend detaching
+    # the streams to get binary streams.  Some code might do this, so
+    # we need to deal with this case explicitly.
+    if _is_binary_reader(stream, False):
+        return t.cast(t.BinaryIO, stream)
+
+    buf = getattr(stream, "buffer", None)
+
+    # Same situation here; this time we assume that the buffer is
+    # actually binary in case it's closed.
+    if buf is not None and _is_binary_reader(buf, True):
+        return t.cast(t.BinaryIO, buf)
+
+    return None
+
+
+def _find_binary_writer(stream: t.IO) -> t.Optional[t.BinaryIO]:
+    # We need to figure out if the given stream is already binary.
+    # This can happen because the official docs recommend detaching
+    # the streams to get binary streams.  Some code might do this, so
+    # we need to deal with this case explicitly.
+    if _is_binary_writer(stream, False):
+        return t.cast(t.BinaryIO, stream)
+
+    buf = getattr(stream, "buffer", None)
+
+    # Same situation here; this time we assume that the buffer is
+    # actually binary in case it's closed.
+    if buf is not None and _is_binary_writer(buf, True):
+        return t.cast(t.BinaryIO, buf)
+
+    return None
+
+
+def _stream_is_misconfigured(stream: t.TextIO) -> bool:
+    """A stream is misconfigured if its encoding is ASCII."""
+    # If the stream does not have an encoding set, we assume it's set
+    # to ASCII.  This appears to happen in certain unittest
+    # environments.  It's not quite clear what the correct behavior is
+    # but this at least will force Click to recover somehow.
+    return is_ascii_encoding(getattr(stream, "encoding", None) or "ascii")
+
+
+def _is_compat_stream_attr(stream: t.TextIO, attr: str, value: t.Optional[str]) -> bool:
+    """A stream attribute is compatible if it is equal to the
+    desired value or the desired value is unset and the attribute
+    has a value.
+    """
+    stream_value = getattr(stream, attr, None)
+    return stream_value == value or (value is None and stream_value is not None)
+
+
+def _is_compatible_text_stream(
+    stream: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str]
+) -> bool:
+    """Check if a stream's encoding and errors attributes are
+    compatible with the desired values.
+    """
+    return _is_compat_stream_attr(
+        stream, "encoding", encoding
+    ) and _is_compat_stream_attr(stream, "errors", errors)
+
+
+def _force_correct_text_stream(
+    text_stream: t.IO,
+    encoding: t.Optional[str],
+    errors: t.Optional[str],
+    is_binary: t.Callable[[t.IO, bool], bool],
+    find_binary: t.Callable[[t.IO], t.Optional[t.BinaryIO]],
+    force_readable: bool = False,
+    force_writable: bool = False,
+) -> t.TextIO:
+    if is_binary(text_stream, False):
+        binary_reader = t.cast(t.BinaryIO, text_stream)
+    else:
+        text_stream = t.cast(t.TextIO, text_stream)
+        # If the stream looks compatible, and won't default to a
+        # misconfigured ascii encoding, return it as-is.
+        if _is_compatible_text_stream(text_stream, encoding, errors) and not (
+            encoding is None and _stream_is_misconfigured(text_stream)
+        ):
+            return text_stream
+
+        # Otherwise, get the underlying binary reader.
+        possible_binary_reader = find_binary(text_stream)
+
+        # If that's not possible, silently use the original reader
+        # and get mojibake instead of exceptions.
+        if possible_binary_reader is None:
+            return text_stream
+
+        binary_reader = possible_binary_reader
+
+    # Default errors to replace instead of strict in order to get
+    # something that works.
+    if errors is None:
+        errors = "replace"
+
+    # Wrap the binary stream in a text stream with the correct
+    # encoding parameters.
+    return _make_text_stream(
+        binary_reader,
+        encoding,
+        errors,
+        force_readable=force_readable,
+        force_writable=force_writable,
+    )
+
+
+def _force_correct_text_reader(
+    text_reader: t.IO,
+    encoding: t.Optional[str],
+    errors: t.Optional[str],
+    force_readable: bool = False,
+) -> t.TextIO:
+    return _force_correct_text_stream(
+        text_reader,
+        encoding,
+        errors,
+        _is_binary_reader,
+        _find_binary_reader,
+        force_readable=force_readable,
+    )
+
+
+def _force_correct_text_writer(
+    text_writer: t.IO,
+    encoding: t.Optional[str],
+    errors: t.Optional[str],
+    force_writable: bool = False,
+) -> t.TextIO:
+    return _force_correct_text_stream(
+        text_writer,
+        encoding,
+        errors,
+        _is_binary_writer,
+        _find_binary_writer,
+        force_writable=force_writable,
+    )
+
+
+def get_binary_stdin() -> t.BinaryIO:
+    reader = _find_binary_reader(sys.stdin)
+    if reader is None:
+        raise RuntimeError("Was not able to determine binary stream for sys.stdin.")
+    return reader
+
+
+def get_binary_stdout() -> t.BinaryIO:
+    writer = _find_binary_writer(sys.stdout)
+    if writer is None:
+        raise RuntimeError("Was not able to determine binary stream for sys.stdout.")
+    return writer
+
+
+def get_binary_stderr() -> t.BinaryIO:
+    writer = _find_binary_writer(sys.stderr)
+    if writer is None:
+        raise RuntimeError("Was not able to determine binary stream for sys.stderr.")
+    return writer
+
+
+def get_text_stdin(
+    encoding: t.Optional[str] = None, errors: t.Optional[str] = None
+) -> t.TextIO:
+    rv = _get_windows_console_stream(sys.stdin, encoding, errors)
+    if rv is not None:
+        return rv
+    return _force_correct_text_reader(sys.stdin, encoding, errors, force_readable=True)
+
+
+def get_text_stdout(
+    encoding: t.Optional[str] = None, errors: t.Optional[str] = None
+) -> t.TextIO:
+    rv = _get_windows_console_stream(sys.stdout, encoding, errors)
+    if rv is not None:
+        return rv
+    return _force_correct_text_writer(sys.stdout, encoding, errors, force_writable=True)
+
+
+def get_text_stderr(
+    encoding: t.Optional[str] = None, errors: t.Optional[str] = None
+) -> t.TextIO:
+    rv = _get_windows_console_stream(sys.stderr, encoding, errors)
+    if rv is not None:
+        return rv
+    return _force_correct_text_writer(sys.stderr, encoding, errors, force_writable=True)
+
+
+def _wrap_io_open(
+    file: t.Union[str, os.PathLike, int],
+    mode: str,
+    encoding: t.Optional[str],
+    errors: t.Optional[str],
+) -> t.IO:
+    """Handles not passing ``encoding`` and ``errors`` in binary mode."""
+    if "b" in mode:
+        return open(file, mode)
+
+    return open(file, mode, encoding=encoding, errors=errors)
+
+
+def open_stream(
+    filename: str,
+    mode: str = "r",
+    encoding: t.Optional[str] = None,
+    errors: t.Optional[str] = "strict",
+    atomic: bool = False,
+) -> t.Tuple[t.IO, bool]:
+    binary = "b" in mode
+
+    # Standard streams first. These are simple because they ignore the
+    # atomic flag. Use fsdecode to handle Path("-").
+    if os.fsdecode(filename) == "-":
+        if any(m in mode for m in ["w", "a", "x"]):
+            if binary:
+                return get_binary_stdout(), False
+            return get_text_stdout(encoding=encoding, errors=errors), False
+        if binary:
+            return get_binary_stdin(), False
+        return get_text_stdin(encoding=encoding, errors=errors), False
+
+    # Non-atomic writes directly go out through the regular open functions.
+    if not atomic:
+        return _wrap_io_open(filename, mode, encoding, errors), True
+
+    # Some usability stuff for atomic writes
+    if "a" in mode:
+        raise ValueError(
+            "Appending to an existing file is not supported, because that"
+            " would involve an expensive `copy`-operation to a temporary"
+            " file. Open the file in normal `w`-mode and copy explicitly"
+            " if that's what you're after."
+        )
+    if "x" in mode:
+        raise ValueError("Use the `overwrite`-parameter instead.")
+    if "w" not in mode:
+        raise ValueError("Atomic writes only make sense with `w`-mode.")
+
+    # Atomic writes are more complicated.  They work by opening a file
+    # as a proxy in the same folder and then using the fdopen
+    # functionality to wrap it in a Python file.  Then we wrap it in an
+    # atomic file that moves the file over on close.
+    import errno
+    import random
+
+    try:
+        perm: t.Optional[int] = os.stat(filename).st_mode
+    except OSError:
+        perm = None
+
+    flags = os.O_RDWR | os.O_CREAT | os.O_EXCL
+
+    if binary:
+        flags |= getattr(os, "O_BINARY", 0)
+
+    while True:
+        tmp_filename = os.path.join(
+            os.path.dirname(filename),
+            f".__atomic-write{random.randrange(1 << 32):08x}",
+        )
+        try:
+            fd = os.open(tmp_filename, flags, 0o666 if perm is None else perm)
+            break
+        except OSError as e:
+            if e.errno == errno.EEXIST or (
+                os.name == "nt"
+                and e.errno == errno.EACCES
+                and os.path.isdir(e.filename)
+                and os.access(e.filename, os.W_OK)
+            ):
+                continue
+            raise
+
+    if perm is not None:
+        os.chmod(tmp_filename, perm)  # in case perm includes bits in umask
+
+    f = _wrap_io_open(fd, mode, encoding, errors)
+    af = _AtomicFile(f, tmp_filename, os.path.realpath(filename))
+    return t.cast(t.IO, af), True
+
+
+class _AtomicFile:
+    def __init__(self, f: t.IO, tmp_filename: str, real_filename: str) -> None:
+        self._f = f
+        self._tmp_filename = tmp_filename
+        self._real_filename = real_filename
+        self.closed = False
+
+    @property
+    def name(self) -> str:
+        return self._real_filename
+
+    def close(self, delete: bool = False) -> None:
+        if self.closed:
+            return
+        self._f.close()
+        os.replace(self._tmp_filename, self._real_filename)
+        self.closed = True
+
+    def __getattr__(self, name: str) -> t.Any:
+        return getattr(self._f, name)
+
+    def __enter__(self) -> "_AtomicFile":
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self.close(delete=exc_type is not None)
+
+    def __repr__(self) -> str:
+        return repr(self._f)
+
+
+def strip_ansi(value: str) -> str:
+    return _ansi_re.sub("", value)
+
+
+def _is_jupyter_kernel_output(stream: t.IO) -> bool:
+    while isinstance(stream, (_FixupStream, _NonClosingTextIOWrapper)):
+        stream = stream._stream
+
+    return stream.__class__.__module__.startswith("ipykernel.")
+
+
+def should_strip_ansi(
+    stream: t.Optional[t.IO] = None, color: t.Optional[bool] = None
+) -> bool:
+    if color is None:
+        if stream is None:
+            stream = sys.stdin
+        return not isatty(stream) and not _is_jupyter_kernel_output(stream)
+    return not color
+
+
+# On Windows, wrap the output streams with colorama to support ANSI
+# color codes.
+# NOTE: double check is needed so mypy does not analyze this on Linux
+if sys.platform.startswith("win") and WIN:
+    from ._winconsole import _get_windows_console_stream
+
+    def _get_argv_encoding() -> str:
+        import locale
+
+        return locale.getpreferredencoding()
+
+    _ansi_stream_wrappers: t.MutableMapping[t.TextIO, t.TextIO] = WeakKeyDictionary()
+
+    def auto_wrap_for_ansi(
+        stream: t.TextIO, color: t.Optional[bool] = None
+    ) -> t.TextIO:
+        """Support ANSI color and style codes on Windows by wrapping a
+        stream with colorama.
+        """
+        try:
+            cached = _ansi_stream_wrappers.get(stream)
+        except Exception:
+            cached = None
+
+        if cached is not None:
+            return cached
+
+        import colorama
+
+        strip = should_strip_ansi(stream, color)
+        ansi_wrapper = colorama.AnsiToWin32(stream, strip=strip)
+        rv = t.cast(t.TextIO, ansi_wrapper.stream)
+        _write = rv.write
+
+        def _safe_write(s):
+            try:
+                return _write(s)
+            except BaseException:
+                ansi_wrapper.reset_all()
+                raise
+
+        rv.write = _safe_write
+
+        try:
+            _ansi_stream_wrappers[stream] = rv
+        except Exception:
+            pass
+
+        return rv
+
+else:
+
+    def _get_argv_encoding() -> str:
+        return getattr(sys.stdin, "encoding", None) or get_filesystem_encoding()
+
+    def _get_windows_console_stream(
+        f: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str]
+    ) -> t.Optional[t.TextIO]:
+        return None
+
+
+def term_len(x: str) -> int:
+    return len(strip_ansi(x))
+
+
+def isatty(stream: t.IO) -> bool:
+    try:
+        return stream.isatty()
+    except Exception:
+        return False
+
+
+def _make_cached_stream_func(
+    src_func: t.Callable[[], t.TextIO], wrapper_func: t.Callable[[], t.TextIO]
+) -> t.Callable[[], t.TextIO]:
+    cache: t.MutableMapping[t.TextIO, t.TextIO] = WeakKeyDictionary()
+
+    def func() -> t.TextIO:
+        stream = src_func()
+        try:
+            rv = cache.get(stream)
+        except Exception:
+            rv = None
+        if rv is not None:
+            return rv
+        rv = wrapper_func()
+        try:
+            cache[stream] = rv
+        except Exception:
+            pass
+        return rv
+
+    return func
+
+
+_default_text_stdin = _make_cached_stream_func(lambda: sys.stdin, get_text_stdin)
+_default_text_stdout = _make_cached_stream_func(lambda: sys.stdout, get_text_stdout)
+_default_text_stderr = _make_cached_stream_func(lambda: sys.stderr, get_text_stderr)
+
+
+binary_streams: t.Mapping[str, t.Callable[[], t.BinaryIO]] = {
+    "stdin": get_binary_stdin,
+    "stdout": get_binary_stdout,
+    "stderr": get_binary_stderr,
+}
+
+text_streams: t.Mapping[
+    str, t.Callable[[t.Optional[str], t.Optional[str]], t.TextIO]
+] = {
+    "stdin": get_text_stdin,
+    "stdout": get_text_stdout,
+    "stderr": get_text_stderr,
+}
diff --git a/venv/lib/python3.9/site-packages/click/_termui_impl.py b/venv/lib/python3.9/site-packages/click/_termui_impl.py
new file mode 100644
index 0000000..4b979bc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/_termui_impl.py
@@ -0,0 +1,717 @@
+"""
+This module contains implementations for the termui module. To keep the
+import time of Click down, some infrequently used functionality is
+placed in this module and only imported as needed.
+"""
+import contextlib
+import math
+import os
+import sys
+import time
+import typing as t
+from gettext import gettext as _
+
+from ._compat import _default_text_stdout
+from ._compat import CYGWIN
+from ._compat import get_best_encoding
+from ._compat import isatty
+from ._compat import open_stream
+from ._compat import strip_ansi
+from ._compat import term_len
+from ._compat import WIN
+from .exceptions import ClickException
+from .utils import echo
+
+V = t.TypeVar("V")
+
+if os.name == "nt":
+    BEFORE_BAR = "\r"
+    AFTER_BAR = "\n"
+else:
+    BEFORE_BAR = "\r\033[?25l"
+    AFTER_BAR = "\033[?25h\n"
+
+
+class ProgressBar(t.Generic[V]):
+    def __init__(
+        self,
+        iterable: t.Optional[t.Iterable[V]],
+        length: t.Optional[int] = None,
+        fill_char: str = "#",
+        empty_char: str = " ",
+        bar_template: str = "%(bar)s",
+        info_sep: str = "  ",
+        show_eta: bool = True,
+        show_percent: t.Optional[bool] = None,
+        show_pos: bool = False,
+        item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None,
+        label: t.Optional[str] = None,
+        file: t.Optional[t.TextIO] = None,
+        color: t.Optional[bool] = None,
+        update_min_steps: int = 1,
+        width: int = 30,
+    ) -> None:
+        self.fill_char = fill_char
+        self.empty_char = empty_char
+        self.bar_template = bar_template
+        self.info_sep = info_sep
+        self.show_eta = show_eta
+        self.show_percent = show_percent
+        self.show_pos = show_pos
+        self.item_show_func = item_show_func
+        self.label = label or ""
+        if file is None:
+            file = _default_text_stdout()
+        self.file = file
+        self.color = color
+        self.update_min_steps = update_min_steps
+        self._completed_intervals = 0
+        self.width = width
+        self.autowidth = width == 0
+
+        if length is None:
+            from operator import length_hint
+
+            length = length_hint(iterable, -1)
+
+            if length == -1:
+                length = None
+        if iterable is None:
+            if length is None:
+                raise TypeError("iterable or length is required")
+            iterable = t.cast(t.Iterable[V], range(length))
+        self.iter = iter(iterable)
+        self.length = length
+        self.pos = 0
+        self.avg: t.List[float] = []
+        self.start = self.last_eta = time.time()
+        self.eta_known = False
+        self.finished = False
+        self.max_width: t.Optional[int] = None
+        self.entered = False
+        self.current_item: t.Optional[V] = None
+        self.is_hidden = not isatty(self.file)
+        self._last_line: t.Optional[str] = None
+
+    def __enter__(self) -> "ProgressBar":
+        self.entered = True
+        self.render_progress()
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self.render_finish()
+
+    def __iter__(self) -> t.Iterator[V]:
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+        self.render_progress()
+        return self.generator()
+
+    def __next__(self) -> V:
+        # Iteration is defined in terms of a generator function,
+        # returned by iter(self); use that to define next(). This works
+        # because `self.iter` is an iterable consumed by that generator,
+        # so it is re-entry safe. Calling `next(self.generator())`
+        # twice works and does "what you want".
+        return next(iter(self))
+
+    def render_finish(self) -> None:
+        if self.is_hidden:
+            return
+        self.file.write(AFTER_BAR)
+        self.file.flush()
+
+    @property
+    def pct(self) -> float:
+        if self.finished:
+            return 1.0
+        return min(self.pos / (float(self.length or 1) or 1), 1.0)
+
+    @property
+    def time_per_iteration(self) -> float:
+        if not self.avg:
+            return 0.0
+        return sum(self.avg) / float(len(self.avg))
+
+    @property
+    def eta(self) -> float:
+        if self.length is not None and not self.finished:
+            return self.time_per_iteration * (self.length - self.pos)
+        return 0.0
+
+    def format_eta(self) -> str:
+        if self.eta_known:
+            t = int(self.eta)
+            seconds = t % 60
+            t //= 60
+            minutes = t % 60
+            t //= 60
+            hours = t % 24
+            t //= 24
+            if t > 0:
+                return f"{t}d {hours:02}:{minutes:02}:{seconds:02}"
+            else:
+                return f"{hours:02}:{minutes:02}:{seconds:02}"
+        return ""
+
+    def format_pos(self) -> str:
+        pos = str(self.pos)
+        if self.length is not None:
+            pos += f"/{self.length}"
+        return pos
+
+    def format_pct(self) -> str:
+        return f"{int(self.pct * 100): 4}%"[1:]
+
+    def format_bar(self) -> str:
+        if self.length is not None:
+            bar_length = int(self.pct * self.width)
+            bar = self.fill_char * bar_length
+            bar += self.empty_char * (self.width - bar_length)
+        elif self.finished:
+            bar = self.fill_char * self.width
+        else:
+            chars = list(self.empty_char * (self.width or 1))
+            if self.time_per_iteration != 0:
+                chars[
+                    int(
+                        (math.cos(self.pos * self.time_per_iteration) / 2.0 + 0.5)
+                        * self.width
+                    )
+                ] = self.fill_char
+            bar = "".join(chars)
+        return bar
+
+    def format_progress_line(self) -> str:
+        show_percent = self.show_percent
+
+        info_bits = []
+        if self.length is not None and show_percent is None:
+            show_percent = not self.show_pos
+
+        if self.show_pos:
+            info_bits.append(self.format_pos())
+        if show_percent:
+            info_bits.append(self.format_pct())
+        if self.show_eta and self.eta_known and not self.finished:
+            info_bits.append(self.format_eta())
+        if self.item_show_func is not None:
+            item_info = self.item_show_func(self.current_item)
+            if item_info is not None:
+                info_bits.append(item_info)
+
+        return (
+            self.bar_template
+            % {
+                "label": self.label,
+                "bar": self.format_bar(),
+                "info": self.info_sep.join(info_bits),
+            }
+        ).rstrip()
+
+    def render_progress(self) -> None:
+        import shutil
+
+        if self.is_hidden:
+            # Only output the label as it changes if the output is not a
+            # TTY. Use file=stderr if you expect to be piping stdout.
+            if self._last_line != self.label:
+                self._last_line = self.label
+                echo(self.label, file=self.file, color=self.color)
+
+            return
+
+        buf = []
+        # Update width in case the terminal has been resized
+        if self.autowidth:
+            old_width = self.width
+            self.width = 0
+            clutter_length = term_len(self.format_progress_line())
+            new_width = max(0, shutil.get_terminal_size().columns - clutter_length)
+            if new_width < old_width:
+                buf.append(BEFORE_BAR)
+                buf.append(" " * self.max_width)  # type: ignore
+                self.max_width = new_width
+            self.width = new_width
+
+        clear_width = self.width
+        if self.max_width is not None:
+            clear_width = self.max_width
+
+        buf.append(BEFORE_BAR)
+        line = self.format_progress_line()
+        line_len = term_len(line)
+        if self.max_width is None or self.max_width < line_len:
+            self.max_width = line_len
+
+        buf.append(line)
+        buf.append(" " * (clear_width - line_len))
+        line = "".join(buf)
+        # Render the line only if it changed.
+
+        if line != self._last_line:
+            self._last_line = line
+            echo(line, file=self.file, color=self.color, nl=False)
+            self.file.flush()
+
+    def make_step(self, n_steps: int) -> None:
+        self.pos += n_steps
+        if self.length is not None and self.pos >= self.length:
+            self.finished = True
+
+        if (time.time() - self.last_eta) < 1.0:
+            return
+
+        self.last_eta = time.time()
+
+        # self.avg is a rolling list of length <= 7 of steps where steps are
+        # defined as time elapsed divided by the total progress through
+        # self.length.
+        if self.pos:
+            step = (time.time() - self.start) / self.pos
+        else:
+            step = time.time() - self.start
+
+        self.avg = self.avg[-6:] + [step]
+
+        self.eta_known = self.length is not None
+
+    def update(self, n_steps: int, current_item: t.Optional[V] = None) -> None:
+        """Update the progress bar by advancing a specified number of
+        steps, and optionally set the ``current_item`` for this new
+        position.
+
+        :param n_steps: Number of steps to advance.
+        :param current_item: Optional item to set as ``current_item``
+            for the updated position.
+
+        .. versionchanged:: 8.0
+            Added the ``current_item`` optional parameter.
+
+        .. versionchanged:: 8.0
+            Only render when the number of steps meets the
+            ``update_min_steps`` threshold.
+        """
+        if current_item is not None:
+            self.current_item = current_item
+
+        self._completed_intervals += n_steps
+
+        if self._completed_intervals >= self.update_min_steps:
+            self.make_step(self._completed_intervals)
+            self.render_progress()
+            self._completed_intervals = 0
+
+    def finish(self) -> None:
+        self.eta_known = False
+        self.current_item = None
+        self.finished = True
+
+    def generator(self) -> t.Iterator[V]:
+        """Return a generator which yields the items added to the bar
+        during construction, and updates the progress bar *after* the
+        yielded block returns.
+        """
+        # WARNING: the iterator interface for `ProgressBar` relies on
+        # this and only works because this is a simple generator which
+        # doesn't create or manage additional state. If this function
+        # changes, the impact should be evaluated both against
+        # `iter(bar)` and `next(bar)`. `next()` in particular may call
+        # `self.generator()` repeatedly, and this must remain safe in
+        # order for that interface to work.
+        if not self.entered:
+            raise RuntimeError("You need to use progress bars in a with block.")
+
+        if self.is_hidden:
+            yield from self.iter
+        else:
+            for rv in self.iter:
+                self.current_item = rv
+
+                # This allows show_item_func to be updated before the
+                # item is processed. Only trigger at the beginning of
+                # the update interval.
+                if self._completed_intervals == 0:
+                    self.render_progress()
+
+                yield rv
+                self.update(1)
+
+            self.finish()
+            self.render_progress()
+
+
+def pager(generator: t.Iterable[str], color: t.Optional[bool] = None) -> None:
+    """Decide what method to use for paging through text."""
+    stdout = _default_text_stdout()
+    if not isatty(sys.stdin) or not isatty(stdout):
+        return _nullpager(stdout, generator, color)
+    pager_cmd = (os.environ.get("PAGER", None) or "").strip()
+    if pager_cmd:
+        if WIN:
+            return _tempfilepager(generator, pager_cmd, color)
+        return _pipepager(generator, pager_cmd, color)
+    if os.environ.get("TERM") in ("dumb", "emacs"):
+        return _nullpager(stdout, generator, color)
+    if WIN or sys.platform.startswith("os2"):
+        return _tempfilepager(generator, "more <", color)
+    if hasattr(os, "system") and os.system("(less) 2>/dev/null") == 0:
+        return _pipepager(generator, "less", color)
+
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    os.close(fd)
+    try:
+        if hasattr(os, "system") and os.system(f'more "{filename}"') == 0:
+            return _pipepager(generator, "more", color)
+        return _nullpager(stdout, generator, color)
+    finally:
+        os.unlink(filename)
+
+
+def _pipepager(generator: t.Iterable[str], cmd: str, color: t.Optional[bool]) -> None:
+    """Page through text by feeding it to another program.  Invoking a
+    pager through this might support colors.
+    """
+    import subprocess
+
+    env = dict(os.environ)
+
+    # If we're piping to less we might support colors under the
+    # condition that
+    cmd_detail = cmd.rsplit("/", 1)[-1].split()
+    if color is None and cmd_detail[0] == "less":
+        less_flags = f"{os.environ.get('LESS', '')}{' '.join(cmd_detail[1:])}"
+        if not less_flags:
+            env["LESS"] = "-R"
+            color = True
+        elif "r" in less_flags or "R" in less_flags:
+            color = True
+
+    c = subprocess.Popen(cmd, shell=True, stdin=subprocess.PIPE, env=env)
+    stdin = t.cast(t.BinaryIO, c.stdin)
+    encoding = get_best_encoding(stdin)
+    try:
+        for text in generator:
+            if not color:
+                text = strip_ansi(text)
+
+            stdin.write(text.encode(encoding, "replace"))
+    except (OSError, KeyboardInterrupt):
+        pass
+    else:
+        stdin.close()
+
+    # Less doesn't respect ^C, but catches it for its own UI purposes (aborting
+    # search or other commands inside less).
+    #
+    # That means when the user hits ^C, the parent process (click) terminates,
+    # but less is still alive, paging the output and messing up the terminal.
+    #
+    # If the user wants to make the pager exit on ^C, they should set
+    # `LESS='-K'`. It's not our decision to make.
+    while True:
+        try:
+            c.wait()
+        except KeyboardInterrupt:
+            pass
+        else:
+            break
+
+
+def _tempfilepager(
+    generator: t.Iterable[str], cmd: str, color: t.Optional[bool]
+) -> None:
+    """Page through text by invoking a program on a temporary file."""
+    import tempfile
+
+    fd, filename = tempfile.mkstemp()
+    # TODO: This never terminates if the passed generator never terminates.
+    text = "".join(generator)
+    if not color:
+        text = strip_ansi(text)
+    encoding = get_best_encoding(sys.stdout)
+    with open_stream(filename, "wb")[0] as f:
+        f.write(text.encode(encoding))
+    try:
+        os.system(f'{cmd} "{filename}"')
+    finally:
+        os.close(fd)
+        os.unlink(filename)
+
+
+def _nullpager(
+    stream: t.TextIO, generator: t.Iterable[str], color: t.Optional[bool]
+) -> None:
+    """Simply print unformatted text.  This is the ultimate fallback."""
+    for text in generator:
+        if not color:
+            text = strip_ansi(text)
+        stream.write(text)
+
+
+class Editor:
+    def __init__(
+        self,
+        editor: t.Optional[str] = None,
+        env: t.Optional[t.Mapping[str, str]] = None,
+        require_save: bool = True,
+        extension: str = ".txt",
+    ) -> None:
+        self.editor = editor
+        self.env = env
+        self.require_save = require_save
+        self.extension = extension
+
+    def get_editor(self) -> str:
+        if self.editor is not None:
+            return self.editor
+        for key in "VISUAL", "EDITOR":
+            rv = os.environ.get(key)
+            if rv:
+                return rv
+        if WIN:
+            return "notepad"
+        for editor in "sensible-editor", "vim", "nano":
+            if os.system(f"which {editor} >/dev/null 2>&1") == 0:
+                return editor
+        return "vi"
+
+    def edit_file(self, filename: str) -> None:
+        import subprocess
+
+        editor = self.get_editor()
+        environ: t.Optional[t.Dict[str, str]] = None
+
+        if self.env:
+            environ = os.environ.copy()
+            environ.update(self.env)
+
+        try:
+            c = subprocess.Popen(f'{editor} "{filename}"', env=environ, shell=True)
+            exit_code = c.wait()
+            if exit_code != 0:
+                raise ClickException(
+                    _("{editor}: Editing failed").format(editor=editor)
+                )
+        except OSError as e:
+            raise ClickException(
+                _("{editor}: Editing failed: {e}").format(editor=editor, e=e)
+            ) from e
+
+    def edit(self, text: t.Optional[t.AnyStr]) -> t.Optional[t.AnyStr]:
+        import tempfile
+
+        if not text:
+            data = b""
+        elif isinstance(text, (bytes, bytearray)):
+            data = text
+        else:
+            if text and not text.endswith("\n"):
+                text += "\n"
+
+            if WIN:
+                data = text.replace("\n", "\r\n").encode("utf-8-sig")
+            else:
+                data = text.encode("utf-8")
+
+        fd, name = tempfile.mkstemp(prefix="editor-", suffix=self.extension)
+        f: t.BinaryIO
+
+        try:
+            with os.fdopen(fd, "wb") as f:
+                f.write(data)
+
+            # If the filesystem resolution is 1 second, like Mac OS
+            # 10.12 Extended, or 2 seconds, like FAT32, and the editor
+            # closes very fast, require_save can fail. Set the modified
+            # time to be 2 seconds in the past to work around this.
+            os.utime(name, (os.path.getatime(name), os.path.getmtime(name) - 2))
+            # Depending on the resolution, the exact value might not be
+            # recorded, so get the new recorded value.
+            timestamp = os.path.getmtime(name)
+
+            self.edit_file(name)
+
+            if self.require_save and os.path.getmtime(name) == timestamp:
+                return None
+
+            with open(name, "rb") as f:
+                rv = f.read()
+
+            if isinstance(text, (bytes, bytearray)):
+                return rv
+
+            return rv.decode("utf-8-sig").replace("\r\n", "\n")  # type: ignore
+        finally:
+            os.unlink(name)
+
+
+def open_url(url: str, wait: bool = False, locate: bool = False) -> int:
+    import subprocess
+
+    def _unquote_file(url: str) -> str:
+        from urllib.parse import unquote
+
+        if url.startswith("file://"):
+            url = unquote(url[7:])
+
+        return url
+
+    if sys.platform == "darwin":
+        args = ["open"]
+        if wait:
+            args.append("-W")
+        if locate:
+            args.append("-R")
+        args.append(_unquote_file(url))
+        null = open("/dev/null", "w")
+        try:
+            return subprocess.Popen(args, stderr=null).wait()
+        finally:
+            null.close()
+    elif WIN:
+        if locate:
+            url = _unquote_file(url.replace('"', ""))
+            args = f'explorer /select,"{url}"'
+        else:
+            url = url.replace('"', "")
+            wait_str = "/WAIT" if wait else ""
+            args = f'start {wait_str} "" "{url}"'
+        return os.system(args)
+    elif CYGWIN:
+        if locate:
+            url = os.path.dirname(_unquote_file(url).replace('"', ""))
+            args = f'cygstart "{url}"'
+        else:
+            url = url.replace('"', "")
+            wait_str = "-w" if wait else ""
+            args = f'cygstart {wait_str} "{url}"'
+        return os.system(args)
+
+    try:
+        if locate:
+            url = os.path.dirname(_unquote_file(url)) or "."
+        else:
+            url = _unquote_file(url)
+        c = subprocess.Popen(["xdg-open", url])
+        if wait:
+            return c.wait()
+        return 0
+    except OSError:
+        if url.startswith(("http://", "https://")) and not locate and not wait:
+            import webbrowser
+
+            webbrowser.open(url)
+            return 0
+        return 1
+
+
+def _translate_ch_to_exc(ch: str) -> t.Optional[BaseException]:
+    if ch == "\x03":
+        raise KeyboardInterrupt()
+
+    if ch == "\x04" and not WIN:  # Unix-like, Ctrl+D
+        raise EOFError()
+
+    if ch == "\x1a" and WIN:  # Windows, Ctrl+Z
+        raise EOFError()
+
+    return None
+
+
+if WIN:
+    import msvcrt
+
+    @contextlib.contextmanager
+    def raw_terminal() -> t.Iterator[int]:
+        yield -1
+
+    def getchar(echo: bool) -> str:
+        # The function `getch` will return a bytes object corresponding to
+        # the pressed character. Since Windows 10 build 1803, it will also
+        # return \x00 when called a second time after pressing a regular key.
+        #
+        # `getwch` does not share this probably-bugged behavior. Moreover, it
+        # returns a Unicode object by default, which is what we want.
+        #
+        # Either of these functions will return \x00 or \xe0 to indicate
+        # a special key, and you need to call the same function again to get
+        # the "rest" of the code. The fun part is that \u00e0 is
+        # "latin small letter a with grave", so if you type that on a French
+        # keyboard, you _also_ get a \xe0.
+        # E.g., consider the Up arrow. This returns \xe0 and then \x48. The
+        # resulting Unicode string reads as "a with grave" + "capital H".
+        # This is indistinguishable from when the user actually types
+        # "a with grave" and then "capital H".
+        #
+        # When \xe0 is returned, we assume it's part of a special-key sequence
+        # and call `getwch` again, but that means that when the user types
+        # the \u00e0 character, `getchar` doesn't return until a second
+        # character is typed.
+        # The alternative is returning immediately, but that would mess up
+        # cross-platform handling of arrow keys and others that start with
+        # \xe0. Another option is using `getch`, but then we can't reliably
+        # read non-ASCII characters, because return values of `getch` are
+        # limited to the current 8-bit codepage.
+        #
+        # Anyway, Click doesn't claim to do this Right(tm), and using `getwch`
+        # is doing the right thing in more situations than with `getch`.
+        func: t.Callable[[], str]
+
+        if echo:
+            func = msvcrt.getwche  # type: ignore
+        else:
+            func = msvcrt.getwch  # type: ignore
+
+        rv = func()
+
+        if rv in ("\x00", "\xe0"):
+            # \x00 and \xe0 are control characters that indicate special key,
+            # see above.
+            rv += func()
+
+        _translate_ch_to_exc(rv)
+        return rv
+
+else:
+    import tty
+    import termios
+
+    @contextlib.contextmanager
+    def raw_terminal() -> t.Iterator[int]:
+        f: t.Optional[t.TextIO]
+        fd: int
+
+        if not isatty(sys.stdin):
+            f = open("/dev/tty")
+            fd = f.fileno()
+        else:
+            fd = sys.stdin.fileno()
+            f = None
+
+        try:
+            old_settings = termios.tcgetattr(fd)
+
+            try:
+                tty.setraw(fd)
+                yield fd
+            finally:
+                termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
+                sys.stdout.flush()
+
+                if f is not None:
+                    f.close()
+        except termios.error:
+            pass
+
+    def getchar(echo: bool) -> str:
+        with raw_terminal() as fd:
+            ch = os.read(fd, 32).decode(get_best_encoding(sys.stdin), "replace")
+
+            if echo and isatty(sys.stdout):
+                sys.stdout.write(ch)
+
+            _translate_ch_to_exc(ch)
+            return ch
diff --git a/venv/lib/python3.9/site-packages/click/_textwrap.py b/venv/lib/python3.9/site-packages/click/_textwrap.py
new file mode 100644
index 0000000..b47dcbd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/_textwrap.py
@@ -0,0 +1,49 @@
+import textwrap
+import typing as t
+from contextlib import contextmanager
+
+
+class TextWrapper(textwrap.TextWrapper):
+    def _handle_long_word(
+        self,
+        reversed_chunks: t.List[str],
+        cur_line: t.List[str],
+        cur_len: int,
+        width: int,
+    ) -> None:
+        space_left = max(width - cur_len, 1)
+
+        if self.break_long_words:
+            last = reversed_chunks[-1]
+            cut = last[:space_left]
+            res = last[space_left:]
+            cur_line.append(cut)
+            reversed_chunks[-1] = res
+        elif not cur_line:
+            cur_line.append(reversed_chunks.pop())
+
+    @contextmanager
+    def extra_indent(self, indent: str) -> t.Iterator[None]:
+        old_initial_indent = self.initial_indent
+        old_subsequent_indent = self.subsequent_indent
+        self.initial_indent += indent
+        self.subsequent_indent += indent
+
+        try:
+            yield
+        finally:
+            self.initial_indent = old_initial_indent
+            self.subsequent_indent = old_subsequent_indent
+
+    def indent_only(self, text: str) -> str:
+        rv = []
+
+        for idx, line in enumerate(text.splitlines()):
+            indent = self.initial_indent
+
+            if idx > 0:
+                indent = self.subsequent_indent
+
+            rv.append(f"{indent}{line}")
+
+        return "\n".join(rv)
diff --git a/venv/lib/python3.9/site-packages/click/_winconsole.py b/venv/lib/python3.9/site-packages/click/_winconsole.py
new file mode 100644
index 0000000..6b20df3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/_winconsole.py
@@ -0,0 +1,279 @@
+# This module is based on the excellent work by Adam Bartoš who
+# provided a lot of what went into the implementation here in
+# the discussion to issue1602 in the Python bug tracker.
+#
+# There are some general differences in regards to how this works
+# compared to the original patches as we do not need to patch
+# the entire interpreter but just work in our little world of
+# echo and prompt.
+import io
+import sys
+import time
+import typing as t
+from ctypes import byref
+from ctypes import c_char
+from ctypes import c_char_p
+from ctypes import c_int
+from ctypes import c_ssize_t
+from ctypes import c_ulong
+from ctypes import c_void_p
+from ctypes import POINTER
+from ctypes import py_object
+from ctypes import Structure
+from ctypes.wintypes import DWORD
+from ctypes.wintypes import HANDLE
+from ctypes.wintypes import LPCWSTR
+from ctypes.wintypes import LPWSTR
+
+from ._compat import _NonClosingTextIOWrapper
+
+assert sys.platform == "win32"
+import msvcrt  # noqa: E402
+from ctypes import windll  # noqa: E402
+from ctypes import WINFUNCTYPE  # noqa: E402
+
+c_ssize_p = POINTER(c_ssize_t)
+
+kernel32 = windll.kernel32
+GetStdHandle = kernel32.GetStdHandle
+ReadConsoleW = kernel32.ReadConsoleW
+WriteConsoleW = kernel32.WriteConsoleW
+GetConsoleMode = kernel32.GetConsoleMode
+GetLastError = kernel32.GetLastError
+GetCommandLineW = WINFUNCTYPE(LPWSTR)(("GetCommandLineW", windll.kernel32))
+CommandLineToArgvW = WINFUNCTYPE(POINTER(LPWSTR), LPCWSTR, POINTER(c_int))(
+    ("CommandLineToArgvW", windll.shell32)
+)
+LocalFree = WINFUNCTYPE(c_void_p, c_void_p)(("LocalFree", windll.kernel32))
+
+STDIN_HANDLE = GetStdHandle(-10)
+STDOUT_HANDLE = GetStdHandle(-11)
+STDERR_HANDLE = GetStdHandle(-12)
+
+PyBUF_SIMPLE = 0
+PyBUF_WRITABLE = 1
+
+ERROR_SUCCESS = 0
+ERROR_NOT_ENOUGH_MEMORY = 8
+ERROR_OPERATION_ABORTED = 995
+
+STDIN_FILENO = 0
+STDOUT_FILENO = 1
+STDERR_FILENO = 2
+
+EOF = b"\x1a"
+MAX_BYTES_WRITTEN = 32767
+
+try:
+    from ctypes import pythonapi
+except ImportError:
+    # On PyPy we cannot get buffers so our ability to operate here is
+    # severely limited.
+    get_buffer = None
+else:
+
+    class Py_buffer(Structure):
+        _fields_ = [
+            ("buf", c_void_p),
+            ("obj", py_object),
+            ("len", c_ssize_t),
+            ("itemsize", c_ssize_t),
+            ("readonly", c_int),
+            ("ndim", c_int),
+            ("format", c_char_p),
+            ("shape", c_ssize_p),
+            ("strides", c_ssize_p),
+            ("suboffsets", c_ssize_p),
+            ("internal", c_void_p),
+        ]
+
+    PyObject_GetBuffer = pythonapi.PyObject_GetBuffer
+    PyBuffer_Release = pythonapi.PyBuffer_Release
+
+    def get_buffer(obj, writable=False):
+        buf = Py_buffer()
+        flags = PyBUF_WRITABLE if writable else PyBUF_SIMPLE
+        PyObject_GetBuffer(py_object(obj), byref(buf), flags)
+
+        try:
+            buffer_type = c_char * buf.len
+            return buffer_type.from_address(buf.buf)
+        finally:
+            PyBuffer_Release(byref(buf))
+
+
+class _WindowsConsoleRawIOBase(io.RawIOBase):
+    def __init__(self, handle):
+        self.handle = handle
+
+    def isatty(self):
+        super().isatty()
+        return True
+
+
+class _WindowsConsoleReader(_WindowsConsoleRawIOBase):
+    def readable(self):
+        return True
+
+    def readinto(self, b):
+        bytes_to_be_read = len(b)
+        if not bytes_to_be_read:
+            return 0
+        elif bytes_to_be_read % 2:
+            raise ValueError(
+                "cannot read odd number of bytes from UTF-16-LE encoded console"
+            )
+
+        buffer = get_buffer(b, writable=True)
+        code_units_to_be_read = bytes_to_be_read // 2
+        code_units_read = c_ulong()
+
+        rv = ReadConsoleW(
+            HANDLE(self.handle),
+            buffer,
+            code_units_to_be_read,
+            byref(code_units_read),
+            None,
+        )
+        if GetLastError() == ERROR_OPERATION_ABORTED:
+            # wait for KeyboardInterrupt
+            time.sleep(0.1)
+        if not rv:
+            raise OSError(f"Windows error: {GetLastError()}")
+
+        if buffer[0] == EOF:
+            return 0
+        return 2 * code_units_read.value
+
+
+class _WindowsConsoleWriter(_WindowsConsoleRawIOBase):
+    def writable(self):
+        return True
+
+    @staticmethod
+    def _get_error_message(errno):
+        if errno == ERROR_SUCCESS:
+            return "ERROR_SUCCESS"
+        elif errno == ERROR_NOT_ENOUGH_MEMORY:
+            return "ERROR_NOT_ENOUGH_MEMORY"
+        return f"Windows error {errno}"
+
+    def write(self, b):
+        bytes_to_be_written = len(b)
+        buf = get_buffer(b)
+        code_units_to_be_written = min(bytes_to_be_written, MAX_BYTES_WRITTEN) // 2
+        code_units_written = c_ulong()
+
+        WriteConsoleW(
+            HANDLE(self.handle),
+            buf,
+            code_units_to_be_written,
+            byref(code_units_written),
+            None,
+        )
+        bytes_written = 2 * code_units_written.value
+
+        if bytes_written == 0 and bytes_to_be_written > 0:
+            raise OSError(self._get_error_message(GetLastError()))
+        return bytes_written
+
+
+class ConsoleStream:
+    def __init__(self, text_stream: t.TextIO, byte_stream: t.BinaryIO) -> None:
+        self._text_stream = text_stream
+        self.buffer = byte_stream
+
+    @property
+    def name(self) -> str:
+        return self.buffer.name
+
+    def write(self, x: t.AnyStr) -> int:
+        if isinstance(x, str):
+            return self._text_stream.write(x)
+        try:
+            self.flush()
+        except Exception:
+            pass
+        return self.buffer.write(x)
+
+    def writelines(self, lines: t.Iterable[t.AnyStr]) -> None:
+        for line in lines:
+            self.write(line)
+
+    def __getattr__(self, name: str) -> t.Any:
+        return getattr(self._text_stream, name)
+
+    def isatty(self) -> bool:
+        return self.buffer.isatty()
+
+    def __repr__(self):
+        return f"<ConsoleStream name={self.name!r} encoding={self.encoding!r}>"
+
+
+def _get_text_stdin(buffer_stream: t.BinaryIO) -> t.TextIO:
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedReader(_WindowsConsoleReader(STDIN_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream))
+
+
+def _get_text_stdout(buffer_stream: t.BinaryIO) -> t.TextIO:
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDOUT_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream))
+
+
+def _get_text_stderr(buffer_stream: t.BinaryIO) -> t.TextIO:
+    text_stream = _NonClosingTextIOWrapper(
+        io.BufferedWriter(_WindowsConsoleWriter(STDERR_HANDLE)),
+        "utf-16-le",
+        "strict",
+        line_buffering=True,
+    )
+    return t.cast(t.TextIO, ConsoleStream(text_stream, buffer_stream))
+
+
+_stream_factories: t.Mapping[int, t.Callable[[t.BinaryIO], t.TextIO]] = {
+    0: _get_text_stdin,
+    1: _get_text_stdout,
+    2: _get_text_stderr,
+}
+
+
+def _is_console(f: t.TextIO) -> bool:
+    if not hasattr(f, "fileno"):
+        return False
+
+    try:
+        fileno = f.fileno()
+    except (OSError, io.UnsupportedOperation):
+        return False
+
+    handle = msvcrt.get_osfhandle(fileno)
+    return bool(GetConsoleMode(handle, byref(DWORD())))
+
+
+def _get_windows_console_stream(
+    f: t.TextIO, encoding: t.Optional[str], errors: t.Optional[str]
+) -> t.Optional[t.TextIO]:
+    if (
+        get_buffer is not None
+        and encoding in {"utf-16-le", None}
+        and errors in {"strict", None}
+        and _is_console(f)
+    ):
+        func = _stream_factories.get(f.fileno())
+        if func is not None:
+            b = getattr(f, "buffer", None)
+
+            if b is None:
+                return None
+
+            return func(b)
diff --git a/venv/lib/python3.9/site-packages/click/core.py b/venv/lib/python3.9/site-packages/click/core.py
new file mode 100644
index 0000000..5abfb0f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/core.py
@@ -0,0 +1,2998 @@
+import enum
+import errno
+import inspect
+import os
+import sys
+import typing as t
+from collections import abc
+from contextlib import contextmanager
+from contextlib import ExitStack
+from functools import partial
+from functools import update_wrapper
+from gettext import gettext as _
+from gettext import ngettext
+from itertools import repeat
+
+from . import types
+from .exceptions import Abort
+from .exceptions import BadParameter
+from .exceptions import ClickException
+from .exceptions import Exit
+from .exceptions import MissingParameter
+from .exceptions import UsageError
+from .formatting import HelpFormatter
+from .formatting import join_options
+from .globals import pop_context
+from .globals import push_context
+from .parser import _flag_needs_value
+from .parser import OptionParser
+from .parser import split_opt
+from .termui import confirm
+from .termui import prompt
+from .termui import style
+from .utils import _detect_program_name
+from .utils import _expand_args
+from .utils import echo
+from .utils import make_default_short_help
+from .utils import make_str
+from .utils import PacifyFlushWrapper
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .shell_completion import CompletionItem
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+V = t.TypeVar("V")
+
+
+def _complete_visible_commands(
+    ctx: "Context", incomplete: str
+) -> t.Iterator[t.Tuple[str, "Command"]]:
+    """List all the subcommands of a group that start with the
+    incomplete value and aren't hidden.
+
+    :param ctx: Invocation context for the group.
+    :param incomplete: Value being completed. May be empty.
+    """
+    multi = t.cast(MultiCommand, ctx.command)
+
+    for name in multi.list_commands(ctx):
+        if name.startswith(incomplete):
+            command = multi.get_command(ctx, name)
+
+            if command is not None and not command.hidden:
+                yield name, command
+
+
+def _check_multicommand(
+    base_command: "MultiCommand", cmd_name: str, cmd: "Command", register: bool = False
+) -> None:
+    if not base_command.chain or not isinstance(cmd, MultiCommand):
+        return
+    if register:
+        hint = (
+            "It is not possible to add multi commands as children to"
+            " another multi command that is in chain mode."
+        )
+    else:
+        hint = (
+            "Found a multi command as subcommand to a multi command"
+            " that is in chain mode. This is not supported."
+        )
+    raise RuntimeError(
+        f"{hint}. Command {base_command.name!r} is set to chain and"
+        f" {cmd_name!r} was added as a subcommand but it in itself is a"
+        f" multi command. ({cmd_name!r} is a {type(cmd).__name__}"
+        f" within a chained {type(base_command).__name__} named"
+        f" {base_command.name!r})."
+    )
+
+
+def batch(iterable: t.Iterable[V], batch_size: int) -> t.List[t.Tuple[V, ...]]:
+    return list(zip(*repeat(iter(iterable), batch_size)))
+
+
+@contextmanager
+def augment_usage_errors(
+    ctx: "Context", param: t.Optional["Parameter"] = None
+) -> t.Iterator[None]:
+    """Context manager that attaches extra information to exceptions."""
+    try:
+        yield
+    except BadParameter as e:
+        if e.ctx is None:
+            e.ctx = ctx
+        if param is not None and e.param is None:
+            e.param = param
+        raise
+    except UsageError as e:
+        if e.ctx is None:
+            e.ctx = ctx
+        raise
+
+
+def iter_params_for_processing(
+    invocation_order: t.Sequence["Parameter"],
+    declaration_order: t.Sequence["Parameter"],
+) -> t.List["Parameter"]:
+    """Given a sequence of parameters in the order as should be considered
+    for processing and an iterable of parameters that exist, this returns
+    a list in the correct order as they should be processed.
+    """
+
+    def sort_key(item: "Parameter") -> t.Tuple[bool, float]:
+        try:
+            idx: float = invocation_order.index(item)
+        except ValueError:
+            idx = float("inf")
+
+        return not item.is_eager, idx
+
+    return sorted(declaration_order, key=sort_key)
+
+
+class ParameterSource(enum.Enum):
+    """This is an :class:`~enum.Enum` that indicates the source of a
+    parameter's value.
+
+    Use :meth:`click.Context.get_parameter_source` to get the
+    source for a parameter by name.
+
+    .. versionchanged:: 8.0
+        Use :class:`~enum.Enum` and drop the ``validate`` method.
+
+    .. versionchanged:: 8.0
+        Added the ``PROMPT`` value.
+    """
+
+    COMMANDLINE = enum.auto()
+    """The value was provided by the command line args."""
+    ENVIRONMENT = enum.auto()
+    """The value was provided with an environment variable."""
+    DEFAULT = enum.auto()
+    """Used the default specified by the parameter."""
+    DEFAULT_MAP = enum.auto()
+    """Used a default provided by :attr:`Context.default_map`."""
+    PROMPT = enum.auto()
+    """Used a prompt to confirm a default or provide a value."""
+
+
+class Context:
+    """The context is a special internal object that holds state relevant
+    for the script execution at every single level.  It's normally invisible
+    to commands unless they opt-in to getting access to it.
+
+    The context is useful as it can pass internal objects around and can
+    control special execution features such as reading data from
+    environment variables.
+
+    A context can be used as context manager in which case it will call
+    :meth:`close` on teardown.
+
+    :param command: the command class for this context.
+    :param parent: the parent context.
+    :param info_name: the info name for this invocation.  Generally this
+                      is the most descriptive name for the script or
+                      command.  For the toplevel script it is usually
+                      the name of the script, for commands below it it's
+                      the name of the script.
+    :param obj: an arbitrary object of user data.
+    :param auto_envvar_prefix: the prefix to use for automatic environment
+                               variables.  If this is `None` then reading
+                               from environment variables is disabled.  This
+                               does not affect manually set environment
+                               variables which are always read.
+    :param default_map: a dictionary (like object) with default values
+                        for parameters.
+    :param terminal_width: the width of the terminal.  The default is
+                           inherit from parent context.  If no context
+                           defines the terminal width then auto
+                           detection will be applied.
+    :param max_content_width: the maximum width for content rendered by
+                              Click (this currently only affects help
+                              pages).  This defaults to 80 characters if
+                              not overridden.  In other words: even if the
+                              terminal is larger than that, Click will not
+                              format things wider than 80 characters by
+                              default.  In addition to that, formatters might
+                              add some safety mapping on the right.
+    :param resilient_parsing: if this flag is enabled then Click will
+                              parse without any interactivity or callback
+                              invocation.  Default values will also be
+                              ignored.  This is useful for implementing
+                              things such as completion support.
+    :param allow_extra_args: if this is set to `True` then extra arguments
+                             at the end will not raise an error and will be
+                             kept on the context.  The default is to inherit
+                             from the command.
+    :param allow_interspersed_args: if this is set to `False` then options
+                                    and arguments cannot be mixed.  The
+                                    default is to inherit from the command.
+    :param ignore_unknown_options: instructs click to ignore options it does
+                                   not know and keeps them for later
+                                   processing.
+    :param help_option_names: optionally a list of strings that define how
+                              the default help parameter is named.  The
+                              default is ``['--help']``.
+    :param token_normalize_func: an optional function that is used to
+                                 normalize tokens (options, choices,
+                                 etc.).  This for instance can be used to
+                                 implement case insensitive behavior.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.  This is only needed if ANSI
+                  codes are used in texts that Click prints which is by
+                  default not the case.  This for instance would affect
+                  help output.
+    :param show_default: Show the default value for commands. If this
+        value is not set, it defaults to the value from the parent
+        context. ``Command.show_default`` overrides this default for the
+        specific command.
+
+    .. versionchanged:: 8.1
+        The ``show_default`` parameter is overridden by
+        ``Command.show_default``, instead of the other way around.
+
+    .. versionchanged:: 8.0
+        The ``show_default`` parameter defaults to the value from the
+        parent context.
+
+    .. versionchanged:: 7.1
+       Added the ``show_default`` parameter.
+
+    .. versionchanged:: 4.0
+        Added the ``color``, ``ignore_unknown_options``, and
+        ``max_content_width`` parameters.
+
+    .. versionchanged:: 3.0
+        Added the ``allow_extra_args`` and ``allow_interspersed_args``
+        parameters.
+
+    .. versionchanged:: 2.0
+        Added the ``resilient_parsing``, ``help_option_names``, and
+        ``token_normalize_func`` parameters.
+    """
+
+    #: The formatter class to create with :meth:`make_formatter`.
+    #:
+    #: .. versionadded:: 8.0
+    formatter_class: t.Type["HelpFormatter"] = HelpFormatter
+
+    def __init__(
+        self,
+        command: "Command",
+        parent: t.Optional["Context"] = None,
+        info_name: t.Optional[str] = None,
+        obj: t.Optional[t.Any] = None,
+        auto_envvar_prefix: t.Optional[str] = None,
+        default_map: t.Optional[t.Dict[str, t.Any]] = None,
+        terminal_width: t.Optional[int] = None,
+        max_content_width: t.Optional[int] = None,
+        resilient_parsing: bool = False,
+        allow_extra_args: t.Optional[bool] = None,
+        allow_interspersed_args: t.Optional[bool] = None,
+        ignore_unknown_options: t.Optional[bool] = None,
+        help_option_names: t.Optional[t.List[str]] = None,
+        token_normalize_func: t.Optional[t.Callable[[str], str]] = None,
+        color: t.Optional[bool] = None,
+        show_default: t.Optional[bool] = None,
+    ) -> None:
+        #: the parent context or `None` if none exists.
+        self.parent = parent
+        #: the :class:`Command` for this context.
+        self.command = command
+        #: the descriptive information name
+        self.info_name = info_name
+        #: Map of parameter names to their parsed values. Parameters
+        #: with ``expose_value=False`` are not stored.
+        self.params: t.Dict[str, t.Any] = {}
+        #: the leftover arguments.
+        self.args: t.List[str] = []
+        #: protected arguments.  These are arguments that are prepended
+        #: to `args` when certain parsing scenarios are encountered but
+        #: must be never propagated to another arguments.  This is used
+        #: to implement nested parsing.
+        self.protected_args: t.List[str] = []
+        #: the collected prefixes of the command's options.
+        self._opt_prefixes: t.Set[str] = set(parent._opt_prefixes) if parent else set()
+
+        if obj is None and parent is not None:
+            obj = parent.obj
+
+        #: the user object stored.
+        self.obj: t.Any = obj
+        self._meta: t.Dict[str, t.Any] = getattr(parent, "meta", {})
+
+        #: A dictionary (-like object) with defaults for parameters.
+        if (
+            default_map is None
+            and info_name is not None
+            and parent is not None
+            and parent.default_map is not None
+        ):
+            default_map = parent.default_map.get(info_name)
+
+        self.default_map: t.Optional[t.Dict[str, t.Any]] = default_map
+
+        #: This flag indicates if a subcommand is going to be executed. A
+        #: group callback can use this information to figure out if it's
+        #: being executed directly or because the execution flow passes
+        #: onwards to a subcommand. By default it's None, but it can be
+        #: the name of the subcommand to execute.
+        #:
+        #: If chaining is enabled this will be set to ``'*'`` in case
+        #: any commands are executed.  It is however not possible to
+        #: figure out which ones.  If you require this knowledge you
+        #: should use a :func:`result_callback`.
+        self.invoked_subcommand: t.Optional[str] = None
+
+        if terminal_width is None and parent is not None:
+            terminal_width = parent.terminal_width
+
+        #: The width of the terminal (None is autodetection).
+        self.terminal_width: t.Optional[int] = terminal_width
+
+        if max_content_width is None and parent is not None:
+            max_content_width = parent.max_content_width
+
+        #: The maximum width of formatted content (None implies a sensible
+        #: default which is 80 for most things).
+        self.max_content_width: t.Optional[int] = max_content_width
+
+        if allow_extra_args is None:
+            allow_extra_args = command.allow_extra_args
+
+        #: Indicates if the context allows extra args or if it should
+        #: fail on parsing.
+        #:
+        #: .. versionadded:: 3.0
+        self.allow_extra_args = allow_extra_args
+
+        if allow_interspersed_args is None:
+            allow_interspersed_args = command.allow_interspersed_args
+
+        #: Indicates if the context allows mixing of arguments and
+        #: options or not.
+        #:
+        #: .. versionadded:: 3.0
+        self.allow_interspersed_args: bool = allow_interspersed_args
+
+        if ignore_unknown_options is None:
+            ignore_unknown_options = command.ignore_unknown_options
+
+        #: Instructs click to ignore options that a command does not
+        #: understand and will store it on the context for later
+        #: processing.  This is primarily useful for situations where you
+        #: want to call into external programs.  Generally this pattern is
+        #: strongly discouraged because it's not possibly to losslessly
+        #: forward all arguments.
+        #:
+        #: .. versionadded:: 4.0
+        self.ignore_unknown_options: bool = ignore_unknown_options
+
+        if help_option_names is None:
+            if parent is not None:
+                help_option_names = parent.help_option_names
+            else:
+                help_option_names = ["--help"]
+
+        #: The names for the help options.
+        self.help_option_names: t.List[str] = help_option_names
+
+        if token_normalize_func is None and parent is not None:
+            token_normalize_func = parent.token_normalize_func
+
+        #: An optional normalization function for tokens.  This is
+        #: options, choices, commands etc.
+        self.token_normalize_func: t.Optional[
+            t.Callable[[str], str]
+        ] = token_normalize_func
+
+        #: Indicates if resilient parsing is enabled.  In that case Click
+        #: will do its best to not cause any failures and default values
+        #: will be ignored. Useful for completion.
+        self.resilient_parsing: bool = resilient_parsing
+
+        # If there is no envvar prefix yet, but the parent has one and
+        # the command on this level has a name, we can expand the envvar
+        # prefix automatically.
+        if auto_envvar_prefix is None:
+            if (
+                parent is not None
+                and parent.auto_envvar_prefix is not None
+                and self.info_name is not None
+            ):
+                auto_envvar_prefix = (
+                    f"{parent.auto_envvar_prefix}_{self.info_name.upper()}"
+                )
+        else:
+            auto_envvar_prefix = auto_envvar_prefix.upper()
+
+        if auto_envvar_prefix is not None:
+            auto_envvar_prefix = auto_envvar_prefix.replace("-", "_")
+
+        self.auto_envvar_prefix: t.Optional[str] = auto_envvar_prefix
+
+        if color is None and parent is not None:
+            color = parent.color
+
+        #: Controls if styling output is wanted or not.
+        self.color: t.Optional[bool] = color
+
+        if show_default is None and parent is not None:
+            show_default = parent.show_default
+
+        #: Show option default values when formatting help text.
+        self.show_default: t.Optional[bool] = show_default
+
+        self._close_callbacks: t.List[t.Callable[[], t.Any]] = []
+        self._depth = 0
+        self._parameter_source: t.Dict[str, ParameterSource] = {}
+        self._exit_stack = ExitStack()
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        """Gather information that could be useful for a tool generating
+        user-facing documentation. This traverses the entire CLI
+        structure.
+
+        .. code-block:: python
+
+            with Context(cli) as ctx:
+                info = ctx.to_info_dict()
+
+        .. versionadded:: 8.0
+        """
+        return {
+            "command": self.command.to_info_dict(self),
+            "info_name": self.info_name,
+            "allow_extra_args": self.allow_extra_args,
+            "allow_interspersed_args": self.allow_interspersed_args,
+            "ignore_unknown_options": self.ignore_unknown_options,
+            "auto_envvar_prefix": self.auto_envvar_prefix,
+        }
+
+    def __enter__(self) -> "Context":
+        self._depth += 1
+        push_context(self)
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self._depth -= 1
+        if self._depth == 0:
+            self.close()
+        pop_context()
+
+    @contextmanager
+    def scope(self, cleanup: bool = True) -> t.Iterator["Context"]:
+        """This helper method can be used with the context object to promote
+        it to the current thread local (see :func:`get_current_context`).
+        The default behavior of this is to invoke the cleanup functions which
+        can be disabled by setting `cleanup` to `False`.  The cleanup
+        functions are typically used for things such as closing file handles.
+
+        If the cleanup is intended the context object can also be directly
+        used as a context manager.
+
+        Example usage::
+
+            with ctx.scope():
+                assert get_current_context() is ctx
+
+        This is equivalent::
+
+            with ctx:
+                assert get_current_context() is ctx
+
+        .. versionadded:: 5.0
+
+        :param cleanup: controls if the cleanup functions should be run or
+                        not.  The default is to run these functions.  In
+                        some situations the context only wants to be
+                        temporarily pushed in which case this can be disabled.
+                        Nested pushes automatically defer the cleanup.
+        """
+        if not cleanup:
+            self._depth += 1
+        try:
+            with self as rv:
+                yield rv
+        finally:
+            if not cleanup:
+                self._depth -= 1
+
+    @property
+    def meta(self) -> t.Dict[str, t.Any]:
+        """This is a dictionary which is shared with all the contexts
+        that are nested.  It exists so that click utilities can store some
+        state here if they need to.  It is however the responsibility of
+        that code to manage this dictionary well.
+
+        The keys are supposed to be unique dotted strings.  For instance
+        module paths are a good choice for it.  What is stored in there is
+        irrelevant for the operation of click.  However what is important is
+        that code that places data here adheres to the general semantics of
+        the system.
+
+        Example usage::
+
+            LANG_KEY = f'{__name__}.lang'
+
+            def set_language(value):
+                ctx = get_current_context()
+                ctx.meta[LANG_KEY] = value
+
+            def get_language():
+                return get_current_context().meta.get(LANG_KEY, 'en_US')
+
+        .. versionadded:: 5.0
+        """
+        return self._meta
+
+    def make_formatter(self) -> HelpFormatter:
+        """Creates the :class:`~click.HelpFormatter` for the help and
+        usage output.
+
+        To quickly customize the formatter class used without overriding
+        this method, set the :attr:`formatter_class` attribute.
+
+        .. versionchanged:: 8.0
+            Added the :attr:`formatter_class` attribute.
+        """
+        return self.formatter_class(
+            width=self.terminal_width, max_width=self.max_content_width
+        )
+
+    def with_resource(self, context_manager: t.ContextManager[V]) -> V:
+        """Register a resource as if it were used in a ``with``
+        statement. The resource will be cleaned up when the context is
+        popped.
+
+        Uses :meth:`contextlib.ExitStack.enter_context`. It calls the
+        resource's ``__enter__()`` method and returns the result. When
+        the context is popped, it closes the stack, which calls the
+        resource's ``__exit__()`` method.
+
+        To register a cleanup function for something that isn't a
+        context manager, use :meth:`call_on_close`. Or use something
+        from :mod:`contextlib` to turn it into a context manager first.
+
+        .. code-block:: python
+
+            @click.group()
+            @click.option("--name")
+            @click.pass_context
+            def cli(ctx):
+                ctx.obj = ctx.with_resource(connect_db(name))
+
+        :param context_manager: The context manager to enter.
+        :return: Whatever ``context_manager.__enter__()`` returns.
+
+        .. versionadded:: 8.0
+        """
+        return self._exit_stack.enter_context(context_manager)
+
+    def call_on_close(self, f: t.Callable[..., t.Any]) -> t.Callable[..., t.Any]:
+        """Register a function to be called when the context tears down.
+
+        This can be used to close resources opened during the script
+        execution. Resources that support Python's context manager
+        protocol which would be used in a ``with`` statement should be
+        registered with :meth:`with_resource` instead.
+
+        :param f: The function to execute on teardown.
+        """
+        return self._exit_stack.callback(f)
+
+    def close(self) -> None:
+        """Invoke all close callbacks registered with
+        :meth:`call_on_close`, and exit all context managers entered
+        with :meth:`with_resource`.
+        """
+        self._exit_stack.close()
+        # In case the context is reused, create a new exit stack.
+        self._exit_stack = ExitStack()
+
+    @property
+    def command_path(self) -> str:
+        """The computed command path.  This is used for the ``usage``
+        information on the help page.  It's automatically created by
+        combining the info names of the chain of contexts to the root.
+        """
+        rv = ""
+        if self.info_name is not None:
+            rv = self.info_name
+        if self.parent is not None:
+            parent_command_path = [self.parent.command_path]
+
+            if isinstance(self.parent.command, Command):
+                for param in self.parent.command.get_params(self):
+                    parent_command_path.extend(param.get_usage_pieces(self))
+
+            rv = f"{' '.join(parent_command_path)} {rv}"
+        return rv.lstrip()
+
+    def find_root(self) -> "Context":
+        """Finds the outermost context."""
+        node = self
+        while node.parent is not None:
+            node = node.parent
+        return node
+
+    def find_object(self, object_type: t.Type[V]) -> t.Optional[V]:
+        """Finds the closest object of a given type."""
+        node: t.Optional["Context"] = self
+
+        while node is not None:
+            if isinstance(node.obj, object_type):
+                return node.obj
+
+            node = node.parent
+
+        return None
+
+    def ensure_object(self, object_type: t.Type[V]) -> V:
+        """Like :meth:`find_object` but sets the innermost object to a
+        new instance of `object_type` if it does not exist.
+        """
+        rv = self.find_object(object_type)
+        if rv is None:
+            self.obj = rv = object_type()
+        return rv
+
+    @t.overload
+    def lookup_default(
+        self, name: str, call: "te.Literal[True]" = True
+    ) -> t.Optional[t.Any]:
+        ...
+
+    @t.overload
+    def lookup_default(
+        self, name: str, call: "te.Literal[False]" = ...
+    ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]:
+        ...
+
+    def lookup_default(self, name: str, call: bool = True) -> t.Optional[t.Any]:
+        """Get the default for a parameter from :attr:`default_map`.
+
+        :param name: Name of the parameter.
+        :param call: If the default is a callable, call it. Disable to
+            return the callable instead.
+
+        .. versionchanged:: 8.0
+            Added the ``call`` parameter.
+        """
+        if self.default_map is not None:
+            value = self.default_map.get(name)
+
+            if call and callable(value):
+                return value()
+
+            return value
+
+        return None
+
+    def fail(self, message: str) -> "te.NoReturn":
+        """Aborts the execution of the program with a specific error
+        message.
+
+        :param message: the error message to fail with.
+        """
+        raise UsageError(message, self)
+
+    def abort(self) -> "te.NoReturn":
+        """Aborts the script."""
+        raise Abort()
+
+    def exit(self, code: int = 0) -> "te.NoReturn":
+        """Exits the application with a given exit code."""
+        raise Exit(code)
+
+    def get_usage(self) -> str:
+        """Helper method to get formatted usage string for the current
+        context and command.
+        """
+        return self.command.get_usage(self)
+
+    def get_help(self) -> str:
+        """Helper method to get formatted help page for the current
+        context and command.
+        """
+        return self.command.get_help(self)
+
+    def _make_sub_context(self, command: "Command") -> "Context":
+        """Create a new context of the same type as this context, but
+        for a new command.
+
+        :meta private:
+        """
+        return type(self)(command, info_name=command.name, parent=self)
+
+    def invoke(
+        __self,  # noqa: B902
+        __callback: t.Union["Command", t.Callable[..., t.Any]],
+        *args: t.Any,
+        **kwargs: t.Any,
+    ) -> t.Any:
+        """Invokes a command callback in exactly the way it expects.  There
+        are two ways to invoke this method:
+
+        1.  the first argument can be a callback and all other arguments and
+            keyword arguments are forwarded directly to the function.
+        2.  the first argument is a click command object.  In that case all
+            arguments are forwarded as well but proper click parameters
+            (options and click arguments) must be keyword arguments and Click
+            will fill in defaults.
+
+        Note that before Click 3.2 keyword arguments were not properly filled
+        in against the intention of this code and no context was created.  For
+        more information about this change and why it was done in a bugfix
+        release see :ref:`upgrade-to-3.2`.
+
+        .. versionchanged:: 8.0
+            All ``kwargs`` are tracked in :attr:`params` so they will be
+            passed if :meth:`forward` is called at multiple levels.
+        """
+        if isinstance(__callback, Command):
+            other_cmd = __callback
+
+            if other_cmd.callback is None:
+                raise TypeError(
+                    "The given command does not have a callback that can be invoked."
+                )
+            else:
+                __callback = other_cmd.callback
+
+            ctx = __self._make_sub_context(other_cmd)
+
+            for param in other_cmd.params:
+                if param.name not in kwargs and param.expose_value:
+                    kwargs[param.name] = param.type_cast_value(  # type: ignore
+                        ctx, param.get_default(ctx)
+                    )
+
+            # Track all kwargs as params, so that forward() will pass
+            # them on in subsequent calls.
+            ctx.params.update(kwargs)
+        else:
+            ctx = __self
+
+        with augment_usage_errors(__self):
+            with ctx:
+                return __callback(*args, **kwargs)
+
+    def forward(
+        __self, __cmd: "Command", *args: t.Any, **kwargs: t.Any  # noqa: B902
+    ) -> t.Any:
+        """Similar to :meth:`invoke` but fills in default keyword
+        arguments from the current context if the other command expects
+        it.  This cannot invoke callbacks directly, only other commands.
+
+        .. versionchanged:: 8.0
+            All ``kwargs`` are tracked in :attr:`params` so they will be
+            passed if ``forward`` is called at multiple levels.
+        """
+        # Can only forward to other commands, not direct callbacks.
+        if not isinstance(__cmd, Command):
+            raise TypeError("Callback is not a command.")
+
+        for param in __self.params:
+            if param not in kwargs:
+                kwargs[param] = __self.params[param]
+
+        return __self.invoke(__cmd, *args, **kwargs)
+
+    def set_parameter_source(self, name: str, source: ParameterSource) -> None:
+        """Set the source of a parameter. This indicates the location
+        from which the value of the parameter was obtained.
+
+        :param name: The name of the parameter.
+        :param source: A member of :class:`~click.core.ParameterSource`.
+        """
+        self._parameter_source[name] = source
+
+    def get_parameter_source(self, name: str) -> t.Optional[ParameterSource]:
+        """Get the source of a parameter. This indicates the location
+        from which the value of the parameter was obtained.
+
+        This can be useful for determining when a user specified a value
+        on the command line that is the same as the default value. It
+        will be :attr:`~click.core.ParameterSource.DEFAULT` only if the
+        value was actually taken from the default.
+
+        :param name: The name of the parameter.
+        :rtype: ParameterSource
+
+        .. versionchanged:: 8.0
+            Returns ``None`` if the parameter was not provided from any
+            source.
+        """
+        return self._parameter_source.get(name)
+
+
+class BaseCommand:
+    """The base command implements the minimal API contract of commands.
+    Most code will never use this as it does not implement a lot of useful
+    functionality but it can act as the direct subclass of alternative
+    parsing methods that do not depend on the Click parser.
+
+    For instance, this can be used to bridge Click and other systems like
+    argparse or docopt.
+
+    Because base commands do not implement a lot of the API that other
+    parts of Click take for granted, they are not supported for all
+    operations.  For instance, they cannot be used with the decorators
+    usually and they have no built-in callback system.
+
+    .. versionchanged:: 2.0
+       Added the `context_settings` parameter.
+
+    :param name: the name of the command to use unless a group overrides it.
+    :param context_settings: an optional dictionary with defaults that are
+                             passed to the context object.
+    """
+
+    #: The context class to create with :meth:`make_context`.
+    #:
+    #: .. versionadded:: 8.0
+    context_class: t.Type[Context] = Context
+    #: the default for the :attr:`Context.allow_extra_args` flag.
+    allow_extra_args = False
+    #: the default for the :attr:`Context.allow_interspersed_args` flag.
+    allow_interspersed_args = True
+    #: the default for the :attr:`Context.ignore_unknown_options` flag.
+    ignore_unknown_options = False
+
+    def __init__(
+        self,
+        name: t.Optional[str],
+        context_settings: t.Optional[t.Dict[str, t.Any]] = None,
+    ) -> None:
+        #: the name the command thinks it has.  Upon registering a command
+        #: on a :class:`Group` the group will default the command name
+        #: with this information.  You should instead use the
+        #: :class:`Context`\'s :attr:`~Context.info_name` attribute.
+        self.name = name
+
+        if context_settings is None:
+            context_settings = {}
+
+        #: an optional dictionary with defaults passed to the context.
+        self.context_settings: t.Dict[str, t.Any] = context_settings
+
+    def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]:
+        """Gather information that could be useful for a tool generating
+        user-facing documentation. This traverses the entire structure
+        below this command.
+
+        Use :meth:`click.Context.to_info_dict` to traverse the entire
+        CLI structure.
+
+        :param ctx: A :class:`Context` representing this command.
+
+        .. versionadded:: 8.0
+        """
+        return {"name": self.name}
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} {self.name}>"
+
+    def get_usage(self, ctx: Context) -> str:
+        raise NotImplementedError("Base commands cannot get usage")
+
+    def get_help(self, ctx: Context) -> str:
+        raise NotImplementedError("Base commands cannot get help")
+
+    def make_context(
+        self,
+        info_name: t.Optional[str],
+        args: t.List[str],
+        parent: t.Optional[Context] = None,
+        **extra: t.Any,
+    ) -> Context:
+        """This function when given an info name and arguments will kick
+        off the parsing and create a new :class:`Context`.  It does not
+        invoke the actual command callback though.
+
+        To quickly customize the context class used without overriding
+        this method, set the :attr:`context_class` attribute.
+
+        :param info_name: the info name for this invocation.  Generally this
+                          is the most descriptive name for the script or
+                          command.  For the toplevel script it's usually
+                          the name of the script, for commands below it it's
+                          the name of the command.
+        :param args: the arguments to parse as list of strings.
+        :param parent: the parent context if available.
+        :param extra: extra keyword arguments forwarded to the context
+                      constructor.
+
+        .. versionchanged:: 8.0
+            Added the :attr:`context_class` attribute.
+        """
+        for key, value in self.context_settings.items():
+            if key not in extra:
+                extra[key] = value
+
+        ctx = self.context_class(
+            self, info_name=info_name, parent=parent, **extra  # type: ignore
+        )
+
+        with ctx.scope(cleanup=False):
+            self.parse_args(ctx, args)
+        return ctx
+
+    def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]:
+        """Given a context and a list of arguments this creates the parser
+        and parses the arguments, then modifies the context as necessary.
+        This is automatically invoked by :meth:`make_context`.
+        """
+        raise NotImplementedError("Base commands do not know how to parse arguments.")
+
+    def invoke(self, ctx: Context) -> t.Any:
+        """Given a context, this invokes the command.  The default
+        implementation is raising a not implemented error.
+        """
+        raise NotImplementedError("Base commands are not invokable by default")
+
+    def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]:
+        """Return a list of completions for the incomplete value. Looks
+        at the names of chained multi-commands.
+
+        Any command could be part of a chained multi-command, so sibling
+        commands are valid at any point during command completion. Other
+        command classes will return more completions.
+
+        :param ctx: Invocation context for this command.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        results: t.List["CompletionItem"] = []
+
+        while ctx.parent is not None:
+            ctx = ctx.parent
+
+            if isinstance(ctx.command, MultiCommand) and ctx.command.chain:
+                results.extend(
+                    CompletionItem(name, help=command.get_short_help_str())
+                    for name, command in _complete_visible_commands(ctx, incomplete)
+                    if name not in ctx.protected_args
+                )
+
+        return results
+
+    @t.overload
+    def main(
+        self,
+        args: t.Optional[t.Sequence[str]] = None,
+        prog_name: t.Optional[str] = None,
+        complete_var: t.Optional[str] = None,
+        standalone_mode: "te.Literal[True]" = True,
+        **extra: t.Any,
+    ) -> "te.NoReturn":
+        ...
+
+    @t.overload
+    def main(
+        self,
+        args: t.Optional[t.Sequence[str]] = None,
+        prog_name: t.Optional[str] = None,
+        complete_var: t.Optional[str] = None,
+        standalone_mode: bool = ...,
+        **extra: t.Any,
+    ) -> t.Any:
+        ...
+
+    def main(
+        self,
+        args: t.Optional[t.Sequence[str]] = None,
+        prog_name: t.Optional[str] = None,
+        complete_var: t.Optional[str] = None,
+        standalone_mode: bool = True,
+        windows_expand_args: bool = True,
+        **extra: t.Any,
+    ) -> t.Any:
+        """This is the way to invoke a script with all the bells and
+        whistles as a command line application.  This will always terminate
+        the application after a call.  If this is not wanted, ``SystemExit``
+        needs to be caught.
+
+        This method is also available by directly calling the instance of
+        a :class:`Command`.
+
+        :param args: the arguments that should be used for parsing.  If not
+                     provided, ``sys.argv[1:]`` is used.
+        :param prog_name: the program name that should be used.  By default
+                          the program name is constructed by taking the file
+                          name from ``sys.argv[0]``.
+        :param complete_var: the environment variable that controls the
+                             bash completion support.  The default is
+                             ``"_<prog_name>_COMPLETE"`` with prog_name in
+                             uppercase.
+        :param standalone_mode: the default behavior is to invoke the script
+                                in standalone mode.  Click will then
+                                handle exceptions and convert them into
+                                error messages and the function will never
+                                return but shut down the interpreter.  If
+                                this is set to `False` they will be
+                                propagated to the caller and the return
+                                value of this function is the return value
+                                of :meth:`invoke`.
+        :param windows_expand_args: Expand glob patterns, user dir, and
+            env vars in command line args on Windows.
+        :param extra: extra keyword arguments are forwarded to the context
+                      constructor.  See :class:`Context` for more information.
+
+        .. versionchanged:: 8.0.1
+            Added the ``windows_expand_args`` parameter to allow
+            disabling command line arg expansion on Windows.
+
+        .. versionchanged:: 8.0
+            When taking arguments from ``sys.argv`` on Windows, glob
+            patterns, user dir, and env vars are expanded.
+
+        .. versionchanged:: 3.0
+           Added the ``standalone_mode`` parameter.
+        """
+        if args is None:
+            args = sys.argv[1:]
+
+            if os.name == "nt" and windows_expand_args:
+                args = _expand_args(args)
+        else:
+            args = list(args)
+
+        if prog_name is None:
+            prog_name = _detect_program_name()
+
+        # Process shell completion requests and exit early.
+        self._main_shell_completion(extra, prog_name, complete_var)
+
+        try:
+            try:
+                with self.make_context(prog_name, args, **extra) as ctx:
+                    rv = self.invoke(ctx)
+                    if not standalone_mode:
+                        return rv
+                    # it's not safe to `ctx.exit(rv)` here!
+                    # note that `rv` may actually contain data like "1" which
+                    # has obvious effects
+                    # more subtle case: `rv=[None, None]` can come out of
+                    # chained commands which all returned `None` -- so it's not
+                    # even always obvious that `rv` indicates success/failure
+                    # by its truthiness/falsiness
+                    ctx.exit()
+            except (EOFError, KeyboardInterrupt):
+                echo(file=sys.stderr)
+                raise Abort() from None
+            except ClickException as e:
+                if not standalone_mode:
+                    raise
+                e.show()
+                sys.exit(e.exit_code)
+            except OSError as e:
+                if e.errno == errno.EPIPE:
+                    sys.stdout = t.cast(t.TextIO, PacifyFlushWrapper(sys.stdout))
+                    sys.stderr = t.cast(t.TextIO, PacifyFlushWrapper(sys.stderr))
+                    sys.exit(1)
+                else:
+                    raise
+        except Exit as e:
+            if standalone_mode:
+                sys.exit(e.exit_code)
+            else:
+                # in non-standalone mode, return the exit code
+                # note that this is only reached if `self.invoke` above raises
+                # an Exit explicitly -- thus bypassing the check there which
+                # would return its result
+                # the results of non-standalone execution may therefore be
+                # somewhat ambiguous: if there are codepaths which lead to
+                # `ctx.exit(1)` and to `return 1`, the caller won't be able to
+                # tell the difference between the two
+                return e.exit_code
+        except Abort:
+            if not standalone_mode:
+                raise
+            echo(_("Aborted!"), file=sys.stderr)
+            sys.exit(1)
+
+    def _main_shell_completion(
+        self,
+        ctx_args: t.Dict[str, t.Any],
+        prog_name: str,
+        complete_var: t.Optional[str] = None,
+    ) -> None:
+        """Check if the shell is asking for tab completion, process
+        that, then exit early. Called from :meth:`main` before the
+        program is invoked.
+
+        :param prog_name: Name of the executable in the shell.
+        :param complete_var: Name of the environment variable that holds
+            the completion instruction. Defaults to
+            ``_{PROG_NAME}_COMPLETE``.
+        """
+        if complete_var is None:
+            complete_var = f"_{prog_name}_COMPLETE".replace("-", "_").upper()
+
+        instruction = os.environ.get(complete_var)
+
+        if not instruction:
+            return
+
+        from .shell_completion import shell_complete
+
+        rv = shell_complete(self, ctx_args, prog_name, complete_var, instruction)
+        sys.exit(rv)
+
+    def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        """Alias for :meth:`main`."""
+        return self.main(*args, **kwargs)
+
+
+class Command(BaseCommand):
+    """Commands are the basic building block of command line interfaces in
+    Click.  A basic command handles command line parsing and might dispatch
+    more parsing to commands nested below it.
+
+    :param name: the name of the command to use unless a group overrides it.
+    :param context_settings: an optional dictionary with defaults that are
+                             passed to the context object.
+    :param callback: the callback to invoke.  This is optional.
+    :param params: the parameters to register with this command.  This can
+                   be either :class:`Option` or :class:`Argument` objects.
+    :param help: the help string to use for this command.
+    :param epilog: like the help string but it's printed at the end of the
+                   help page after everything else.
+    :param short_help: the short help to use for this command.  This is
+                       shown on the command listing of the parent command.
+    :param add_help_option: by default each command registers a ``--help``
+                            option.  This can be disabled by this parameter.
+    :param no_args_is_help: this controls what happens if no arguments are
+                            provided.  This option is disabled by default.
+                            If enabled this will add ``--help`` as argument
+                            if no arguments are passed
+    :param hidden: hide this command from help outputs.
+
+    :param deprecated: issues a message indicating that
+                             the command is deprecated.
+
+    .. versionchanged:: 8.1
+        ``help``, ``epilog``, and ``short_help`` are stored unprocessed,
+        all formatting is done when outputting help text, not at init,
+        and is done even if not using the ``@command`` decorator.
+
+    .. versionchanged:: 8.0
+        Added a ``repr`` showing the command name.
+
+    .. versionchanged:: 7.1
+        Added the ``no_args_is_help`` parameter.
+
+    .. versionchanged:: 2.0
+        Added the ``context_settings`` parameter.
+    """
+
+    def __init__(
+        self,
+        name: t.Optional[str],
+        context_settings: t.Optional[t.Dict[str, t.Any]] = None,
+        callback: t.Optional[t.Callable[..., t.Any]] = None,
+        params: t.Optional[t.List["Parameter"]] = None,
+        help: t.Optional[str] = None,
+        epilog: t.Optional[str] = None,
+        short_help: t.Optional[str] = None,
+        options_metavar: t.Optional[str] = "[OPTIONS]",
+        add_help_option: bool = True,
+        no_args_is_help: bool = False,
+        hidden: bool = False,
+        deprecated: bool = False,
+    ) -> None:
+        super().__init__(name, context_settings)
+        #: the callback to execute when the command fires.  This might be
+        #: `None` in which case nothing happens.
+        self.callback = callback
+        #: the list of parameters for this command in the order they
+        #: should show up in the help page and execute.  Eager parameters
+        #: will automatically be handled before non eager ones.
+        self.params: t.List["Parameter"] = params or []
+        self.help = help
+        self.epilog = epilog
+        self.options_metavar = options_metavar
+        self.short_help = short_help
+        self.add_help_option = add_help_option
+        self.no_args_is_help = no_args_is_help
+        self.hidden = hidden
+        self.deprecated = deprecated
+
+    def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict(ctx)
+        info_dict.update(
+            params=[param.to_info_dict() for param in self.get_params(ctx)],
+            help=self.help,
+            epilog=self.epilog,
+            short_help=self.short_help,
+            hidden=self.hidden,
+            deprecated=self.deprecated,
+        )
+        return info_dict
+
+    def get_usage(self, ctx: Context) -> str:
+        """Formats the usage line into a string and returns it.
+
+        Calls :meth:`format_usage` internally.
+        """
+        formatter = ctx.make_formatter()
+        self.format_usage(ctx, formatter)
+        return formatter.getvalue().rstrip("\n")
+
+    def get_params(self, ctx: Context) -> t.List["Parameter"]:
+        rv = self.params
+        help_option = self.get_help_option(ctx)
+
+        if help_option is not None:
+            rv = [*rv, help_option]
+
+        return rv
+
+    def format_usage(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Writes the usage line into the formatter.
+
+        This is a low-level method called by :meth:`get_usage`.
+        """
+        pieces = self.collect_usage_pieces(ctx)
+        formatter.write_usage(ctx.command_path, " ".join(pieces))
+
+    def collect_usage_pieces(self, ctx: Context) -> t.List[str]:
+        """Returns all the pieces that go into the usage line and returns
+        it as a list of strings.
+        """
+        rv = [self.options_metavar] if self.options_metavar else []
+
+        for param in self.get_params(ctx):
+            rv.extend(param.get_usage_pieces(ctx))
+
+        return rv
+
+    def get_help_option_names(self, ctx: Context) -> t.List[str]:
+        """Returns the names for the help option."""
+        all_names = set(ctx.help_option_names)
+        for param in self.params:
+            all_names.difference_update(param.opts)
+            all_names.difference_update(param.secondary_opts)
+        return list(all_names)
+
+    def get_help_option(self, ctx: Context) -> t.Optional["Option"]:
+        """Returns the help option object."""
+        help_options = self.get_help_option_names(ctx)
+
+        if not help_options or not self.add_help_option:
+            return None
+
+        def show_help(ctx: Context, param: "Parameter", value: str) -> None:
+            if value and not ctx.resilient_parsing:
+                echo(ctx.get_help(), color=ctx.color)
+                ctx.exit()
+
+        return Option(
+            help_options,
+            is_flag=True,
+            is_eager=True,
+            expose_value=False,
+            callback=show_help,
+            help=_("Show this message and exit."),
+        )
+
+    def make_parser(self, ctx: Context) -> OptionParser:
+        """Creates the underlying option parser for this command."""
+        parser = OptionParser(ctx)
+        for param in self.get_params(ctx):
+            param.add_to_parser(parser, ctx)
+        return parser
+
+    def get_help(self, ctx: Context) -> str:
+        """Formats the help into a string and returns it.
+
+        Calls :meth:`format_help` internally.
+        """
+        formatter = ctx.make_formatter()
+        self.format_help(ctx, formatter)
+        return formatter.getvalue().rstrip("\n")
+
+    def get_short_help_str(self, limit: int = 45) -> str:
+        """Gets short help for the command or makes it by shortening the
+        long help string.
+        """
+        if self.short_help:
+            text = inspect.cleandoc(self.short_help)
+        elif self.help:
+            text = make_default_short_help(self.help, limit)
+        else:
+            text = ""
+
+        if self.deprecated:
+            text = _("(Deprecated) {text}").format(text=text)
+
+        return text.strip()
+
+    def format_help(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Writes the help into the formatter if it exists.
+
+        This is a low-level method called by :meth:`get_help`.
+
+        This calls the following methods:
+
+        -   :meth:`format_usage`
+        -   :meth:`format_help_text`
+        -   :meth:`format_options`
+        -   :meth:`format_epilog`
+        """
+        self.format_usage(ctx, formatter)
+        self.format_help_text(ctx, formatter)
+        self.format_options(ctx, formatter)
+        self.format_epilog(ctx, formatter)
+
+    def format_help_text(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Writes the help text to the formatter if it exists."""
+        text = self.help if self.help is not None else ""
+
+        if self.deprecated:
+            text = _("(Deprecated) {text}").format(text=text)
+
+        if text:
+            text = inspect.cleandoc(text).partition("\f")[0]
+            formatter.write_paragraph()
+
+            with formatter.indentation():
+                formatter.write_text(text)
+
+    def format_options(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Writes all the options into the formatter if they exist."""
+        opts = []
+        for param in self.get_params(ctx):
+            rv = param.get_help_record(ctx)
+            if rv is not None:
+                opts.append(rv)
+
+        if opts:
+            with formatter.section(_("Options")):
+                formatter.write_dl(opts)
+
+    def format_epilog(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Writes the epilog into the formatter if it exists."""
+        if self.epilog:
+            epilog = inspect.cleandoc(self.epilog)
+            formatter.write_paragraph()
+
+            with formatter.indentation():
+                formatter.write_text(epilog)
+
+    def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]:
+        if not args and self.no_args_is_help and not ctx.resilient_parsing:
+            echo(ctx.get_help(), color=ctx.color)
+            ctx.exit()
+
+        parser = self.make_parser(ctx)
+        opts, args, param_order = parser.parse_args(args=args)
+
+        for param in iter_params_for_processing(param_order, self.get_params(ctx)):
+            value, args = param.handle_parse_result(ctx, opts, args)
+
+        if args and not ctx.allow_extra_args and not ctx.resilient_parsing:
+            ctx.fail(
+                ngettext(
+                    "Got unexpected extra argument ({args})",
+                    "Got unexpected extra arguments ({args})",
+                    len(args),
+                ).format(args=" ".join(map(str, args)))
+            )
+
+        ctx.args = args
+        ctx._opt_prefixes.update(parser._opt_prefixes)
+        return args
+
+    def invoke(self, ctx: Context) -> t.Any:
+        """Given a context, this invokes the attached callback (if it exists)
+        in the right way.
+        """
+        if self.deprecated:
+            message = _(
+                "DeprecationWarning: The command {name!r} is deprecated."
+            ).format(name=self.name)
+            echo(style(message, fg="red"), err=True)
+
+        if self.callback is not None:
+            return ctx.invoke(self.callback, **ctx.params)
+
+    def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]:
+        """Return a list of completions for the incomplete value. Looks
+        at the names of options and chained multi-commands.
+
+        :param ctx: Invocation context for this command.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        results: t.List["CompletionItem"] = []
+
+        if incomplete and not incomplete[0].isalnum():
+            for param in self.get_params(ctx):
+                if (
+                    not isinstance(param, Option)
+                    or param.hidden
+                    or (
+                        not param.multiple
+                        and ctx.get_parameter_source(param.name)  # type: ignore
+                        is ParameterSource.COMMANDLINE
+                    )
+                ):
+                    continue
+
+                results.extend(
+                    CompletionItem(name, help=param.help)
+                    for name in [*param.opts, *param.secondary_opts]
+                    if name.startswith(incomplete)
+                )
+
+        results.extend(super().shell_complete(ctx, incomplete))
+        return results
+
+
+class MultiCommand(Command):
+    """A multi command is the basic implementation of a command that
+    dispatches to subcommands.  The most common version is the
+    :class:`Group`.
+
+    :param invoke_without_command: this controls how the multi command itself
+                                   is invoked.  By default it's only invoked
+                                   if a subcommand is provided.
+    :param no_args_is_help: this controls what happens if no arguments are
+                            provided.  This option is enabled by default if
+                            `invoke_without_command` is disabled or disabled
+                            if it's enabled.  If enabled this will add
+                            ``--help`` as argument if no arguments are
+                            passed.
+    :param subcommand_metavar: the string that is used in the documentation
+                               to indicate the subcommand place.
+    :param chain: if this is set to `True` chaining of multiple subcommands
+                  is enabled.  This restricts the form of commands in that
+                  they cannot have optional arguments but it allows
+                  multiple commands to be chained together.
+    :param result_callback: The result callback to attach to this multi
+        command. This can be set or changed later with the
+        :meth:`result_callback` decorator.
+    """
+
+    allow_extra_args = True
+    allow_interspersed_args = False
+
+    def __init__(
+        self,
+        name: t.Optional[str] = None,
+        invoke_without_command: bool = False,
+        no_args_is_help: t.Optional[bool] = None,
+        subcommand_metavar: t.Optional[str] = None,
+        chain: bool = False,
+        result_callback: t.Optional[t.Callable[..., t.Any]] = None,
+        **attrs: t.Any,
+    ) -> None:
+        super().__init__(name, **attrs)
+
+        if no_args_is_help is None:
+            no_args_is_help = not invoke_without_command
+
+        self.no_args_is_help = no_args_is_help
+        self.invoke_without_command = invoke_without_command
+
+        if subcommand_metavar is None:
+            if chain:
+                subcommand_metavar = "COMMAND1 [ARGS]... [COMMAND2 [ARGS]...]..."
+            else:
+                subcommand_metavar = "COMMAND [ARGS]..."
+
+        self.subcommand_metavar = subcommand_metavar
+        self.chain = chain
+        # The result callback that is stored. This can be set or
+        # overridden with the :func:`result_callback` decorator.
+        self._result_callback = result_callback
+
+        if self.chain:
+            for param in self.params:
+                if isinstance(param, Argument) and not param.required:
+                    raise RuntimeError(
+                        "Multi commands in chain mode cannot have"
+                        " optional arguments."
+                    )
+
+    def to_info_dict(self, ctx: Context) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict(ctx)
+        commands = {}
+
+        for name in self.list_commands(ctx):
+            command = self.get_command(ctx, name)
+
+            if command is None:
+                continue
+
+            sub_ctx = ctx._make_sub_context(command)
+
+            with sub_ctx.scope(cleanup=False):
+                commands[name] = command.to_info_dict(sub_ctx)
+
+        info_dict.update(commands=commands, chain=self.chain)
+        return info_dict
+
+    def collect_usage_pieces(self, ctx: Context) -> t.List[str]:
+        rv = super().collect_usage_pieces(ctx)
+        rv.append(self.subcommand_metavar)
+        return rv
+
+    def format_options(self, ctx: Context, formatter: HelpFormatter) -> None:
+        super().format_options(ctx, formatter)
+        self.format_commands(ctx, formatter)
+
+    def result_callback(self, replace: bool = False) -> t.Callable[[F], F]:
+        """Adds a result callback to the command.  By default if a
+        result callback is already registered this will chain them but
+        this can be disabled with the `replace` parameter.  The result
+        callback is invoked with the return value of the subcommand
+        (or the list of return values from all subcommands if chaining
+        is enabled) as well as the parameters as they would be passed
+        to the main callback.
+
+        Example::
+
+            @click.group()
+            @click.option('-i', '--input', default=23)
+            def cli(input):
+                return 42
+
+            @cli.result_callback()
+            def process_result(result, input):
+                return result + input
+
+        :param replace: if set to `True` an already existing result
+                        callback will be removed.
+
+        .. versionchanged:: 8.0
+            Renamed from ``resultcallback``.
+
+        .. versionadded:: 3.0
+        """
+
+        def decorator(f: F) -> F:
+            old_callback = self._result_callback
+
+            if old_callback is None or replace:
+                self._result_callback = f
+                return f
+
+            def function(__value, *args, **kwargs):  # type: ignore
+                inner = old_callback(__value, *args, **kwargs)  # type: ignore
+                return f(inner, *args, **kwargs)
+
+            self._result_callback = rv = update_wrapper(t.cast(F, function), f)
+            return rv
+
+        return decorator
+
+    def format_commands(self, ctx: Context, formatter: HelpFormatter) -> None:
+        """Extra format methods for multi methods that adds all the commands
+        after the options.
+        """
+        commands = []
+        for subcommand in self.list_commands(ctx):
+            cmd = self.get_command(ctx, subcommand)
+            # What is this, the tool lied about a command.  Ignore it
+            if cmd is None:
+                continue
+            if cmd.hidden:
+                continue
+
+            commands.append((subcommand, cmd))
+
+        # allow for 3 times the default spacing
+        if len(commands):
+            limit = formatter.width - 6 - max(len(cmd[0]) for cmd in commands)
+
+            rows = []
+            for subcommand, cmd in commands:
+                help = cmd.get_short_help_str(limit)
+                rows.append((subcommand, help))
+
+            if rows:
+                with formatter.section(_("Commands")):
+                    formatter.write_dl(rows)
+
+    def parse_args(self, ctx: Context, args: t.List[str]) -> t.List[str]:
+        if not args and self.no_args_is_help and not ctx.resilient_parsing:
+            echo(ctx.get_help(), color=ctx.color)
+            ctx.exit()
+
+        rest = super().parse_args(ctx, args)
+
+        if self.chain:
+            ctx.protected_args = rest
+            ctx.args = []
+        elif rest:
+            ctx.protected_args, ctx.args = rest[:1], rest[1:]
+
+        return ctx.args
+
+    def invoke(self, ctx: Context) -> t.Any:
+        def _process_result(value: t.Any) -> t.Any:
+            if self._result_callback is not None:
+                value = ctx.invoke(self._result_callback, value, **ctx.params)
+            return value
+
+        if not ctx.protected_args:
+            if self.invoke_without_command:
+                # No subcommand was invoked, so the result callback is
+                # invoked with the group return value for regular
+                # groups, or an empty list for chained groups.
+                with ctx:
+                    rv = super().invoke(ctx)
+                    return _process_result([] if self.chain else rv)
+            ctx.fail(_("Missing command."))
+
+        # Fetch args back out
+        args = [*ctx.protected_args, *ctx.args]
+        ctx.args = []
+        ctx.protected_args = []
+
+        # If we're not in chain mode, we only allow the invocation of a
+        # single command but we also inform the current context about the
+        # name of the command to invoke.
+        if not self.chain:
+            # Make sure the context is entered so we do not clean up
+            # resources until the result processor has worked.
+            with ctx:
+                cmd_name, cmd, args = self.resolve_command(ctx, args)
+                assert cmd is not None
+                ctx.invoked_subcommand = cmd_name
+                super().invoke(ctx)
+                sub_ctx = cmd.make_context(cmd_name, args, parent=ctx)
+                with sub_ctx:
+                    return _process_result(sub_ctx.command.invoke(sub_ctx))
+
+        # In chain mode we create the contexts step by step, but after the
+        # base command has been invoked.  Because at that point we do not
+        # know the subcommands yet, the invoked subcommand attribute is
+        # set to ``*`` to inform the command that subcommands are executed
+        # but nothing else.
+        with ctx:
+            ctx.invoked_subcommand = "*" if args else None
+            super().invoke(ctx)
+
+            # Otherwise we make every single context and invoke them in a
+            # chain.  In that case the return value to the result processor
+            # is the list of all invoked subcommand's results.
+            contexts = []
+            while args:
+                cmd_name, cmd, args = self.resolve_command(ctx, args)
+                assert cmd is not None
+                sub_ctx = cmd.make_context(
+                    cmd_name,
+                    args,
+                    parent=ctx,
+                    allow_extra_args=True,
+                    allow_interspersed_args=False,
+                )
+                contexts.append(sub_ctx)
+                args, sub_ctx.args = sub_ctx.args, []
+
+            rv = []
+            for sub_ctx in contexts:
+                with sub_ctx:
+                    rv.append(sub_ctx.command.invoke(sub_ctx))
+            return _process_result(rv)
+
+    def resolve_command(
+        self, ctx: Context, args: t.List[str]
+    ) -> t.Tuple[t.Optional[str], t.Optional[Command], t.List[str]]:
+        cmd_name = make_str(args[0])
+        original_cmd_name = cmd_name
+
+        # Get the command
+        cmd = self.get_command(ctx, cmd_name)
+
+        # If we can't find the command but there is a normalization
+        # function available, we try with that one.
+        if cmd is None and ctx.token_normalize_func is not None:
+            cmd_name = ctx.token_normalize_func(cmd_name)
+            cmd = self.get_command(ctx, cmd_name)
+
+        # If we don't find the command we want to show an error message
+        # to the user that it was not provided.  However, there is
+        # something else we should do: if the first argument looks like
+        # an option we want to kick off parsing again for arguments to
+        # resolve things like --help which now should go to the main
+        # place.
+        if cmd is None and not ctx.resilient_parsing:
+            if split_opt(cmd_name)[0]:
+                self.parse_args(ctx, ctx.args)
+            ctx.fail(_("No such command {name!r}.").format(name=original_cmd_name))
+        return cmd_name if cmd else None, cmd, args[1:]
+
+    def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]:
+        """Given a context and a command name, this returns a
+        :class:`Command` object if it exists or returns `None`.
+        """
+        raise NotImplementedError
+
+    def list_commands(self, ctx: Context) -> t.List[str]:
+        """Returns a list of subcommand names in the order they should
+        appear.
+        """
+        return []
+
+    def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]:
+        """Return a list of completions for the incomplete value. Looks
+        at the names of options, subcommands, and chained
+        multi-commands.
+
+        :param ctx: Invocation context for this command.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        results = [
+            CompletionItem(name, help=command.get_short_help_str())
+            for name, command in _complete_visible_commands(ctx, incomplete)
+        ]
+        results.extend(super().shell_complete(ctx, incomplete))
+        return results
+
+
+class Group(MultiCommand):
+    """A group allows a command to have subcommands attached. This is
+    the most common way to implement nesting in Click.
+
+    :param name: The name of the group command.
+    :param commands: A dict mapping names to :class:`Command` objects.
+        Can also be a list of :class:`Command`, which will use
+        :attr:`Command.name` to create the dict.
+    :param attrs: Other command arguments described in
+        :class:`MultiCommand`, :class:`Command`, and
+        :class:`BaseCommand`.
+
+    .. versionchanged:: 8.0
+        The ``commmands`` argument can be a list of command objects.
+    """
+
+    #: If set, this is used by the group's :meth:`command` decorator
+    #: as the default :class:`Command` class. This is useful to make all
+    #: subcommands use a custom command class.
+    #:
+    #: .. versionadded:: 8.0
+    command_class: t.Optional[t.Type[Command]] = None
+
+    #: If set, this is used by the group's :meth:`group` decorator
+    #: as the default :class:`Group` class. This is useful to make all
+    #: subgroups use a custom group class.
+    #:
+    #: If set to the special value :class:`type` (literally
+    #: ``group_class = type``), this group's class will be used as the
+    #: default class. This makes a custom group class continue to make
+    #: custom groups.
+    #:
+    #: .. versionadded:: 8.0
+    group_class: t.Optional[t.Union[t.Type["Group"], t.Type[type]]] = None
+    # Literal[type] isn't valid, so use Type[type]
+
+    def __init__(
+        self,
+        name: t.Optional[str] = None,
+        commands: t.Optional[t.Union[t.Dict[str, Command], t.Sequence[Command]]] = None,
+        **attrs: t.Any,
+    ) -> None:
+        super().__init__(name, **attrs)
+
+        if commands is None:
+            commands = {}
+        elif isinstance(commands, abc.Sequence):
+            commands = {c.name: c for c in commands if c.name is not None}
+
+        #: The registered subcommands by their exported names.
+        self.commands: t.Dict[str, Command] = commands
+
+    def add_command(self, cmd: Command, name: t.Optional[str] = None) -> None:
+        """Registers another :class:`Command` with this group.  If the name
+        is not provided, the name of the command is used.
+        """
+        name = name or cmd.name
+        if name is None:
+            raise TypeError("Command has no name.")
+        _check_multicommand(self, name, cmd, register=True)
+        self.commands[name] = cmd
+
+    @t.overload
+    def command(self, __func: t.Callable[..., t.Any]) -> Command:
+        ...
+
+    @t.overload
+    def command(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> t.Callable[[t.Callable[..., t.Any]], Command]:
+        ...
+
+    def command(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> t.Union[t.Callable[[t.Callable[..., t.Any]], Command], Command]:
+        """A shortcut decorator for declaring and attaching a command to
+        the group. This takes the same arguments as :func:`command` and
+        immediately registers the created command with this group by
+        calling :meth:`add_command`.
+
+        To customize the command class used, set the
+        :attr:`command_class` attribute.
+
+        .. versionchanged:: 8.1
+            This decorator can be applied without parentheses.
+
+        .. versionchanged:: 8.0
+            Added the :attr:`command_class` attribute.
+        """
+        from .decorators import command
+
+        if self.command_class and kwargs.get("cls") is None:
+            kwargs["cls"] = self.command_class
+
+        func: t.Optional[t.Callable] = None
+
+        if args and callable(args[0]):
+            assert (
+                len(args) == 1 and not kwargs
+            ), "Use 'command(**kwargs)(callable)' to provide arguments."
+            (func,) = args
+            args = ()
+
+        def decorator(f: t.Callable[..., t.Any]) -> Command:
+            cmd: Command = command(*args, **kwargs)(f)
+            self.add_command(cmd)
+            return cmd
+
+        if func is not None:
+            return decorator(func)
+
+        return decorator
+
+    @t.overload
+    def group(self, __func: t.Callable[..., t.Any]) -> "Group":
+        ...
+
+    @t.overload
+    def group(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> t.Callable[[t.Callable[..., t.Any]], "Group"]:
+        ...
+
+    def group(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> t.Union[t.Callable[[t.Callable[..., t.Any]], "Group"], "Group"]:
+        """A shortcut decorator for declaring and attaching a group to
+        the group. This takes the same arguments as :func:`group` and
+        immediately registers the created group with this group by
+        calling :meth:`add_command`.
+
+        To customize the group class used, set the :attr:`group_class`
+        attribute.
+
+        .. versionchanged:: 8.1
+            This decorator can be applied without parentheses.
+
+        .. versionchanged:: 8.0
+            Added the :attr:`group_class` attribute.
+        """
+        from .decorators import group
+
+        func: t.Optional[t.Callable] = None
+
+        if args and callable(args[0]):
+            assert (
+                len(args) == 1 and not kwargs
+            ), "Use 'group(**kwargs)(callable)' to provide arguments."
+            (func,) = args
+            args = ()
+
+        if self.group_class is not None and kwargs.get("cls") is None:
+            if self.group_class is type:
+                kwargs["cls"] = type(self)
+            else:
+                kwargs["cls"] = self.group_class
+
+        def decorator(f: t.Callable[..., t.Any]) -> "Group":
+            cmd: Group = group(*args, **kwargs)(f)
+            self.add_command(cmd)
+            return cmd
+
+        if func is not None:
+            return decorator(func)
+
+        return decorator
+
+    def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]:
+        return self.commands.get(cmd_name)
+
+    def list_commands(self, ctx: Context) -> t.List[str]:
+        return sorted(self.commands)
+
+
+class CommandCollection(MultiCommand):
+    """A command collection is a multi command that merges multiple multi
+    commands together into one.  This is a straightforward implementation
+    that accepts a list of different multi commands as sources and
+    provides all the commands for each of them.
+    """
+
+    def __init__(
+        self,
+        name: t.Optional[str] = None,
+        sources: t.Optional[t.List[MultiCommand]] = None,
+        **attrs: t.Any,
+    ) -> None:
+        super().__init__(name, **attrs)
+        #: The list of registered multi commands.
+        self.sources: t.List[MultiCommand] = sources or []
+
+    def add_source(self, multi_cmd: MultiCommand) -> None:
+        """Adds a new multi command to the chain dispatcher."""
+        self.sources.append(multi_cmd)
+
+    def get_command(self, ctx: Context, cmd_name: str) -> t.Optional[Command]:
+        for source in self.sources:
+            rv = source.get_command(ctx, cmd_name)
+
+            if rv is not None:
+                if self.chain:
+                    _check_multicommand(self, cmd_name, rv)
+
+                return rv
+
+        return None
+
+    def list_commands(self, ctx: Context) -> t.List[str]:
+        rv: t.Set[str] = set()
+
+        for source in self.sources:
+            rv.update(source.list_commands(ctx))
+
+        return sorted(rv)
+
+
+def _check_iter(value: t.Any) -> t.Iterator[t.Any]:
+    """Check if the value is iterable but not a string. Raises a type
+    error, or return an iterator over the value.
+    """
+    if isinstance(value, str):
+        raise TypeError
+
+    return iter(value)
+
+
+class Parameter:
+    r"""A parameter to a command comes in two versions: they are either
+    :class:`Option`\s or :class:`Argument`\s.  Other subclasses are currently
+    not supported by design as some of the internals for parsing are
+    intentionally not finalized.
+
+    Some settings are supported by both options and arguments.
+
+    :param param_decls: the parameter declarations for this option or
+                        argument.  This is a list of flags or argument
+                        names.
+    :param type: the type that should be used.  Either a :class:`ParamType`
+                 or a Python type.  The later is converted into the former
+                 automatically if supported.
+    :param required: controls if this is optional or not.
+    :param default: the default value if omitted.  This can also be a callable,
+                    in which case it's invoked when the default is needed
+                    without any arguments.
+    :param callback: A function to further process or validate the value
+        after type conversion. It is called as ``f(ctx, param, value)``
+        and must return the value. It is called for all sources,
+        including prompts.
+    :param nargs: the number of arguments to match.  If not ``1`` the return
+                  value is a tuple instead of single value.  The default for
+                  nargs is ``1`` (except if the type is a tuple, then it's
+                  the arity of the tuple). If ``nargs=-1``, all remaining
+                  parameters are collected.
+    :param metavar: how the value is represented in the help page.
+    :param expose_value: if this is `True` then the value is passed onwards
+                         to the command callback and stored on the context,
+                         otherwise it's skipped.
+    :param is_eager: eager values are processed before non eager ones.  This
+                     should not be set for arguments or it will inverse the
+                     order of processing.
+    :param envvar: a string or list of strings that are environment variables
+                   that should be checked.
+    :param shell_complete: A function that returns custom shell
+        completions. Used instead of the param's type completion if
+        given. Takes ``ctx, param, incomplete`` and must return a list
+        of :class:`~click.shell_completion.CompletionItem` or a list of
+        strings.
+
+    .. versionchanged:: 8.0
+        ``process_value`` validates required parameters and bounded
+        ``nargs``, and invokes the parameter callback before returning
+        the value. This allows the callback to validate prompts.
+        ``full_process_value`` is removed.
+
+    .. versionchanged:: 8.0
+        ``autocompletion`` is renamed to ``shell_complete`` and has new
+        semantics described above. The old name is deprecated and will
+        be removed in 8.1, until then it will be wrapped to match the
+        new requirements.
+
+    .. versionchanged:: 8.0
+        For ``multiple=True, nargs>1``, the default must be a list of
+        tuples.
+
+    .. versionchanged:: 8.0
+        Setting a default is no longer required for ``nargs>1``, it will
+        default to ``None``. ``multiple=True`` or ``nargs=-1`` will
+        default to ``()``.
+
+    .. versionchanged:: 7.1
+        Empty environment variables are ignored rather than taking the
+        empty string value. This makes it possible for scripts to clear
+        variables if they can't unset them.
+
+    .. versionchanged:: 2.0
+        Changed signature for parameter callback to also be passed the
+        parameter. The old callback format will still work, but it will
+        raise a warning to give you a chance to migrate the code easier.
+    """
+
+    param_type_name = "parameter"
+
+    def __init__(
+        self,
+        param_decls: t.Optional[t.Sequence[str]] = None,
+        type: t.Optional[t.Union[types.ParamType, t.Any]] = None,
+        required: bool = False,
+        default: t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]] = None,
+        callback: t.Optional[t.Callable[[Context, "Parameter", t.Any], t.Any]] = None,
+        nargs: t.Optional[int] = None,
+        multiple: bool = False,
+        metavar: t.Optional[str] = None,
+        expose_value: bool = True,
+        is_eager: bool = False,
+        envvar: t.Optional[t.Union[str, t.Sequence[str]]] = None,
+        shell_complete: t.Optional[
+            t.Callable[
+                [Context, "Parameter", str],
+                t.Union[t.List["CompletionItem"], t.List[str]],
+            ]
+        ] = None,
+    ) -> None:
+        self.name, self.opts, self.secondary_opts = self._parse_decls(
+            param_decls or (), expose_value
+        )
+        self.type = types.convert_type(type, default)
+
+        # Default nargs to what the type tells us if we have that
+        # information available.
+        if nargs is None:
+            if self.type.is_composite:
+                nargs = self.type.arity
+            else:
+                nargs = 1
+
+        self.required = required
+        self.callback = callback
+        self.nargs = nargs
+        self.multiple = multiple
+        self.expose_value = expose_value
+        self.default = default
+        self.is_eager = is_eager
+        self.metavar = metavar
+        self.envvar = envvar
+        self._custom_shell_complete = shell_complete
+
+        if __debug__:
+            if self.type.is_composite and nargs != self.type.arity:
+                raise ValueError(
+                    f"'nargs' must be {self.type.arity} (or None) for"
+                    f" type {self.type!r}, but it was {nargs}."
+                )
+
+            # Skip no default or callable default.
+            check_default = default if not callable(default) else None
+
+            if check_default is not None:
+                if multiple:
+                    try:
+                        # Only check the first value against nargs.
+                        check_default = next(_check_iter(check_default), None)
+                    except TypeError:
+                        raise ValueError(
+                            "'default' must be a list when 'multiple' is true."
+                        ) from None
+
+                # Can be None for multiple with empty default.
+                if nargs != 1 and check_default is not None:
+                    try:
+                        _check_iter(check_default)
+                    except TypeError:
+                        if multiple:
+                            message = (
+                                "'default' must be a list of lists when 'multiple' is"
+                                " true and 'nargs' != 1."
+                            )
+                        else:
+                            message = "'default' must be a list when 'nargs' != 1."
+
+                        raise ValueError(message) from None
+
+                    if nargs > 1 and len(check_default) != nargs:
+                        subject = "item length" if multiple else "length"
+                        raise ValueError(
+                            f"'default' {subject} must match nargs={nargs}."
+                        )
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        """Gather information that could be useful for a tool generating
+        user-facing documentation.
+
+        Use :meth:`click.Context.to_info_dict` to traverse the entire
+        CLI structure.
+
+        .. versionadded:: 8.0
+        """
+        return {
+            "name": self.name,
+            "param_type_name": self.param_type_name,
+            "opts": self.opts,
+            "secondary_opts": self.secondary_opts,
+            "type": self.type.to_info_dict(),
+            "required": self.required,
+            "nargs": self.nargs,
+            "multiple": self.multiple,
+            "default": self.default,
+            "envvar": self.envvar,
+        }
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} {self.name}>"
+
+    def _parse_decls(
+        self, decls: t.Sequence[str], expose_value: bool
+    ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]:
+        raise NotImplementedError()
+
+    @property
+    def human_readable_name(self) -> str:
+        """Returns the human readable name of this parameter.  This is the
+        same as the name for options, but the metavar for arguments.
+        """
+        return self.name  # type: ignore
+
+    def make_metavar(self) -> str:
+        if self.metavar is not None:
+            return self.metavar
+
+        metavar = self.type.get_metavar(self)
+
+        if metavar is None:
+            metavar = self.type.name.upper()
+
+        if self.nargs != 1:
+            metavar += "..."
+
+        return metavar
+
+    @t.overload
+    def get_default(
+        self, ctx: Context, call: "te.Literal[True]" = True
+    ) -> t.Optional[t.Any]:
+        ...
+
+    @t.overload
+    def get_default(
+        self, ctx: Context, call: bool = ...
+    ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]:
+        ...
+
+    def get_default(
+        self, ctx: Context, call: bool = True
+    ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]:
+        """Get the default for the parameter. Tries
+        :meth:`Context.lookup_default` first, then the local default.
+
+        :param ctx: Current context.
+        :param call: If the default is a callable, call it. Disable to
+            return the callable instead.
+
+        .. versionchanged:: 8.0.2
+            Type casting is no longer performed when getting a default.
+
+        .. versionchanged:: 8.0.1
+            Type casting can fail in resilient parsing mode. Invalid
+            defaults will not prevent showing help text.
+
+        .. versionchanged:: 8.0
+            Looks at ``ctx.default_map`` first.
+
+        .. versionchanged:: 8.0
+            Added the ``call`` parameter.
+        """
+        value = ctx.lookup_default(self.name, call=False)  # type: ignore
+
+        if value is None:
+            value = self.default
+
+        if call and callable(value):
+            value = value()
+
+        return value
+
+    def add_to_parser(self, parser: OptionParser, ctx: Context) -> None:
+        raise NotImplementedError()
+
+    def consume_value(
+        self, ctx: Context, opts: t.Mapping[str, t.Any]
+    ) -> t.Tuple[t.Any, ParameterSource]:
+        value = opts.get(self.name)  # type: ignore
+        source = ParameterSource.COMMANDLINE
+
+        if value is None:
+            value = self.value_from_envvar(ctx)
+            source = ParameterSource.ENVIRONMENT
+
+        if value is None:
+            value = ctx.lookup_default(self.name)  # type: ignore
+            source = ParameterSource.DEFAULT_MAP
+
+        if value is None:
+            value = self.get_default(ctx)
+            source = ParameterSource.DEFAULT
+
+        return value, source
+
+    def type_cast_value(self, ctx: Context, value: t.Any) -> t.Any:
+        """Convert and validate a value against the option's
+        :attr:`type`, :attr:`multiple`, and :attr:`nargs`.
+        """
+        if value is None:
+            return () if self.multiple or self.nargs == -1 else None
+
+        def check_iter(value: t.Any) -> t.Iterator:
+            try:
+                return _check_iter(value)
+            except TypeError:
+                # This should only happen when passing in args manually,
+                # the parser should construct an iterable when parsing
+                # the command line.
+                raise BadParameter(
+                    _("Value must be an iterable."), ctx=ctx, param=self
+                ) from None
+
+        if self.nargs == 1 or self.type.is_composite:
+            convert: t.Callable[[t.Any], t.Any] = partial(
+                self.type, param=self, ctx=ctx
+            )
+        elif self.nargs == -1:
+
+            def convert(value: t.Any) -> t.Tuple:
+                return tuple(self.type(x, self, ctx) for x in check_iter(value))
+
+        else:  # nargs > 1
+
+            def convert(value: t.Any) -> t.Tuple:
+                value = tuple(check_iter(value))
+
+                if len(value) != self.nargs:
+                    raise BadParameter(
+                        ngettext(
+                            "Takes {nargs} values but 1 was given.",
+                            "Takes {nargs} values but {len} were given.",
+                            len(value),
+                        ).format(nargs=self.nargs, len=len(value)),
+                        ctx=ctx,
+                        param=self,
+                    )
+
+                return tuple(self.type(x, self, ctx) for x in value)
+
+        if self.multiple:
+            return tuple(convert(x) for x in check_iter(value))
+
+        return convert(value)
+
+    def value_is_missing(self, value: t.Any) -> bool:
+        if value is None:
+            return True
+
+        if (self.nargs != 1 or self.multiple) and value == ():
+            return True
+
+        return False
+
+    def process_value(self, ctx: Context, value: t.Any) -> t.Any:
+        value = self.type_cast_value(ctx, value)
+
+        if self.required and self.value_is_missing(value):
+            raise MissingParameter(ctx=ctx, param=self)
+
+        if self.callback is not None:
+            value = self.callback(ctx, self, value)
+
+        return value
+
+    def resolve_envvar_value(self, ctx: Context) -> t.Optional[str]:
+        if self.envvar is None:
+            return None
+
+        if isinstance(self.envvar, str):
+            rv = os.environ.get(self.envvar)
+
+            if rv:
+                return rv
+        else:
+            for envvar in self.envvar:
+                rv = os.environ.get(envvar)
+
+                if rv:
+                    return rv
+
+        return None
+
+    def value_from_envvar(self, ctx: Context) -> t.Optional[t.Any]:
+        rv: t.Optional[t.Any] = self.resolve_envvar_value(ctx)
+
+        if rv is not None and self.nargs != 1:
+            rv = self.type.split_envvar_value(rv)
+
+        return rv
+
+    def handle_parse_result(
+        self, ctx: Context, opts: t.Mapping[str, t.Any], args: t.List[str]
+    ) -> t.Tuple[t.Any, t.List[str]]:
+        with augment_usage_errors(ctx, param=self):
+            value, source = self.consume_value(ctx, opts)
+            ctx.set_parameter_source(self.name, source)  # type: ignore
+
+            try:
+                value = self.process_value(ctx, value)
+            except Exception:
+                if not ctx.resilient_parsing:
+                    raise
+
+                value = None
+
+        if self.expose_value:
+            ctx.params[self.name] = value  # type: ignore
+
+        return value, args
+
+    def get_help_record(self, ctx: Context) -> t.Optional[t.Tuple[str, str]]:
+        pass
+
+    def get_usage_pieces(self, ctx: Context) -> t.List[str]:
+        return []
+
+    def get_error_hint(self, ctx: Context) -> str:
+        """Get a stringified version of the param for use in error messages to
+        indicate which param caused the error.
+        """
+        hint_list = self.opts or [self.human_readable_name]
+        return " / ".join(f"'{x}'" for x in hint_list)
+
+    def shell_complete(self, ctx: Context, incomplete: str) -> t.List["CompletionItem"]:
+        """Return a list of completions for the incomplete value. If a
+        ``shell_complete`` function was given during init, it is used.
+        Otherwise, the :attr:`type`
+        :meth:`~click.types.ParamType.shell_complete` function is used.
+
+        :param ctx: Invocation context for this command.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        if self._custom_shell_complete is not None:
+            results = self._custom_shell_complete(ctx, self, incomplete)
+
+            if results and isinstance(results[0], str):
+                from click.shell_completion import CompletionItem
+
+                results = [CompletionItem(c) for c in results]
+
+            return t.cast(t.List["CompletionItem"], results)
+
+        return self.type.shell_complete(ctx, self, incomplete)
+
+
+class Option(Parameter):
+    """Options are usually optional values on the command line and
+    have some extra features that arguments don't have.
+
+    All other parameters are passed onwards to the parameter constructor.
+
+    :param show_default: Show the default value for this option in its
+        help text. Values are not shown by default, unless
+        :attr:`Context.show_default` is ``True``. If this value is a
+        string, it shows that string in parentheses instead of the
+        actual value. This is particularly useful for dynamic options.
+        For single option boolean flags, the default remains hidden if
+        its value is ``False``.
+    :param show_envvar: Controls if an environment variable should be
+        shown on the help page. Normally, environment variables are not
+        shown.
+    :param prompt: If set to ``True`` or a non empty string then the
+        user will be prompted for input. If set to ``True`` the prompt
+        will be the option name capitalized.
+    :param confirmation_prompt: Prompt a second time to confirm the
+        value if it was prompted for. Can be set to a string instead of
+        ``True`` to customize the message.
+    :param prompt_required: If set to ``False``, the user will be
+        prompted for input only when the option was specified as a flag
+        without a value.
+    :param hide_input: If this is ``True`` then the input on the prompt
+        will be hidden from the user. This is useful for password input.
+    :param is_flag: forces this option to act as a flag.  The default is
+                    auto detection.
+    :param flag_value: which value should be used for this flag if it's
+                       enabled.  This is set to a boolean automatically if
+                       the option string contains a slash to mark two options.
+    :param multiple: if this is set to `True` then the argument is accepted
+                     multiple times and recorded.  This is similar to ``nargs``
+                     in how it works but supports arbitrary number of
+                     arguments.
+    :param count: this flag makes an option increment an integer.
+    :param allow_from_autoenv: if this is enabled then the value of this
+                               parameter will be pulled from an environment
+                               variable in case a prefix is defined on the
+                               context.
+    :param help: the help string.
+    :param hidden: hide this option from help outputs.
+
+    .. versionchanged:: 8.1.0
+        Help text indentation is cleaned here instead of only in the
+        ``@option`` decorator.
+
+    .. versionchanged:: 8.1.0
+        The ``show_default`` parameter overrides
+        ``Context.show_default``.
+
+    .. versionchanged:: 8.1.0
+        The default of a single option boolean flag is not shown if the
+        default value is ``False``.
+
+    .. versionchanged:: 8.0.1
+        ``type`` is detected from ``flag_value`` if given.
+    """
+
+    param_type_name = "option"
+
+    def __init__(
+        self,
+        param_decls: t.Optional[t.Sequence[str]] = None,
+        show_default: t.Union[bool, str, None] = None,
+        prompt: t.Union[bool, str] = False,
+        confirmation_prompt: t.Union[bool, str] = False,
+        prompt_required: bool = True,
+        hide_input: bool = False,
+        is_flag: t.Optional[bool] = None,
+        flag_value: t.Optional[t.Any] = None,
+        multiple: bool = False,
+        count: bool = False,
+        allow_from_autoenv: bool = True,
+        type: t.Optional[t.Union[types.ParamType, t.Any]] = None,
+        help: t.Optional[str] = None,
+        hidden: bool = False,
+        show_choices: bool = True,
+        show_envvar: bool = False,
+        **attrs: t.Any,
+    ) -> None:
+        if help:
+            help = inspect.cleandoc(help)
+
+        default_is_missing = "default" not in attrs
+        super().__init__(param_decls, type=type, multiple=multiple, **attrs)
+
+        if prompt is True:
+            if self.name is None:
+                raise TypeError("'name' is required with 'prompt=True'.")
+
+            prompt_text: t.Optional[str] = self.name.replace("_", " ").capitalize()
+        elif prompt is False:
+            prompt_text = None
+        else:
+            prompt_text = prompt
+
+        self.prompt = prompt_text
+        self.confirmation_prompt = confirmation_prompt
+        self.prompt_required = prompt_required
+        self.hide_input = hide_input
+        self.hidden = hidden
+
+        # If prompt is enabled but not required, then the option can be
+        # used as a flag to indicate using prompt or flag_value.
+        self._flag_needs_value = self.prompt is not None and not self.prompt_required
+
+        if is_flag is None:
+            if flag_value is not None:
+                # Implicitly a flag because flag_value was set.
+                is_flag = True
+            elif self._flag_needs_value:
+                # Not a flag, but when used as a flag it shows a prompt.
+                is_flag = False
+            else:
+                # Implicitly a flag because flag options were given.
+                is_flag = bool(self.secondary_opts)
+        elif is_flag is False and not self._flag_needs_value:
+            # Not a flag, and prompt is not enabled, can be used as a
+            # flag if flag_value is set.
+            self._flag_needs_value = flag_value is not None
+
+        if is_flag and default_is_missing and not self.required:
+            self.default: t.Union[t.Any, t.Callable[[], t.Any]] = False
+
+        if flag_value is None:
+            flag_value = not self.default
+
+        if is_flag and type is None:
+            # Re-guess the type from the flag value instead of the
+            # default.
+            self.type = types.convert_type(None, flag_value)
+
+        self.is_flag: bool = is_flag
+        self.is_bool_flag = is_flag and isinstance(self.type, types.BoolParamType)
+        self.flag_value: t.Any = flag_value
+
+        # Counting
+        self.count = count
+        if count:
+            if type is None:
+                self.type = types.IntRange(min=0)
+            if default_is_missing:
+                self.default = 0
+
+        self.allow_from_autoenv = allow_from_autoenv
+        self.help = help
+        self.show_default = show_default
+        self.show_choices = show_choices
+        self.show_envvar = show_envvar
+
+        if __debug__:
+            if self.nargs == -1:
+                raise TypeError("nargs=-1 is not supported for options.")
+
+            if self.prompt and self.is_flag and not self.is_bool_flag:
+                raise TypeError("'prompt' is not valid for non-boolean flag.")
+
+            if not self.is_bool_flag and self.secondary_opts:
+                raise TypeError("Secondary flag is not valid for non-boolean flag.")
+
+            if self.is_bool_flag and self.hide_input and self.prompt is not None:
+                raise TypeError(
+                    "'prompt' with 'hide_input' is not valid for boolean flag."
+                )
+
+            if self.count:
+                if self.multiple:
+                    raise TypeError("'count' is not valid with 'multiple'.")
+
+                if self.is_flag:
+                    raise TypeError("'count' is not valid with 'is_flag'.")
+
+            if self.multiple and self.is_flag:
+                raise TypeError("'multiple' is not valid with 'is_flag', use 'count'.")
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict.update(
+            help=self.help,
+            prompt=self.prompt,
+            is_flag=self.is_flag,
+            flag_value=self.flag_value,
+            count=self.count,
+            hidden=self.hidden,
+        )
+        return info_dict
+
+    def _parse_decls(
+        self, decls: t.Sequence[str], expose_value: bool
+    ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]:
+        opts = []
+        secondary_opts = []
+        name = None
+        possible_names = []
+
+        for decl in decls:
+            if decl.isidentifier():
+                if name is not None:
+                    raise TypeError(f"Name '{name}' defined twice")
+                name = decl
+            else:
+                split_char = ";" if decl[:1] == "/" else "/"
+                if split_char in decl:
+                    first, second = decl.split(split_char, 1)
+                    first = first.rstrip()
+                    if first:
+                        possible_names.append(split_opt(first))
+                        opts.append(first)
+                    second = second.lstrip()
+                    if second:
+                        secondary_opts.append(second.lstrip())
+                    if first == second:
+                        raise ValueError(
+                            f"Boolean option {decl!r} cannot use the"
+                            " same flag for true/false."
+                        )
+                else:
+                    possible_names.append(split_opt(decl))
+                    opts.append(decl)
+
+        if name is None and possible_names:
+            possible_names.sort(key=lambda x: -len(x[0]))  # group long options first
+            name = possible_names[0][1].replace("-", "_").lower()
+            if not name.isidentifier():
+                name = None
+
+        if name is None:
+            if not expose_value:
+                return None, opts, secondary_opts
+            raise TypeError("Could not determine name for option")
+
+        if not opts and not secondary_opts:
+            raise TypeError(
+                f"No options defined but a name was passed ({name})."
+                " Did you mean to declare an argument instead? Did"
+                f" you mean to pass '--{name}'?"
+            )
+
+        return name, opts, secondary_opts
+
+    def add_to_parser(self, parser: OptionParser, ctx: Context) -> None:
+        if self.multiple:
+            action = "append"
+        elif self.count:
+            action = "count"
+        else:
+            action = "store"
+
+        if self.is_flag:
+            action = f"{action}_const"
+
+            if self.is_bool_flag and self.secondary_opts:
+                parser.add_option(
+                    obj=self, opts=self.opts, dest=self.name, action=action, const=True
+                )
+                parser.add_option(
+                    obj=self,
+                    opts=self.secondary_opts,
+                    dest=self.name,
+                    action=action,
+                    const=False,
+                )
+            else:
+                parser.add_option(
+                    obj=self,
+                    opts=self.opts,
+                    dest=self.name,
+                    action=action,
+                    const=self.flag_value,
+                )
+        else:
+            parser.add_option(
+                obj=self,
+                opts=self.opts,
+                dest=self.name,
+                action=action,
+                nargs=self.nargs,
+            )
+
+    def get_help_record(self, ctx: Context) -> t.Optional[t.Tuple[str, str]]:
+        if self.hidden:
+            return None
+
+        any_prefix_is_slash = False
+
+        def _write_opts(opts: t.Sequence[str]) -> str:
+            nonlocal any_prefix_is_slash
+
+            rv, any_slashes = join_options(opts)
+
+            if any_slashes:
+                any_prefix_is_slash = True
+
+            if not self.is_flag and not self.count:
+                rv += f" {self.make_metavar()}"
+
+            return rv
+
+        rv = [_write_opts(self.opts)]
+
+        if self.secondary_opts:
+            rv.append(_write_opts(self.secondary_opts))
+
+        help = self.help or ""
+        extra = []
+
+        if self.show_envvar:
+            envvar = self.envvar
+
+            if envvar is None:
+                if (
+                    self.allow_from_autoenv
+                    and ctx.auto_envvar_prefix is not None
+                    and self.name is not None
+                ):
+                    envvar = f"{ctx.auto_envvar_prefix}_{self.name.upper()}"
+
+            if envvar is not None:
+                var_str = (
+                    envvar
+                    if isinstance(envvar, str)
+                    else ", ".join(str(d) for d in envvar)
+                )
+                extra.append(_("env var: {var}").format(var=var_str))
+
+        # Temporarily enable resilient parsing to avoid type casting
+        # failing for the default. Might be possible to extend this to
+        # help formatting in general.
+        resilient = ctx.resilient_parsing
+        ctx.resilient_parsing = True
+
+        try:
+            default_value = self.get_default(ctx, call=False)
+        finally:
+            ctx.resilient_parsing = resilient
+
+        show_default = False
+        show_default_is_str = False
+
+        if self.show_default is not None:
+            if isinstance(self.show_default, str):
+                show_default_is_str = show_default = True
+            else:
+                show_default = self.show_default
+        elif ctx.show_default is not None:
+            show_default = ctx.show_default
+
+        if show_default_is_str or (show_default and (default_value is not None)):
+            if show_default_is_str:
+                default_string = f"({self.show_default})"
+            elif isinstance(default_value, (list, tuple)):
+                default_string = ", ".join(str(d) for d in default_value)
+            elif inspect.isfunction(default_value):
+                default_string = _("(dynamic)")
+            elif self.is_bool_flag and self.secondary_opts:
+                # For boolean flags that have distinct True/False opts,
+                # use the opt without prefix instead of the value.
+                default_string = split_opt(
+                    (self.opts if self.default else self.secondary_opts)[0]
+                )[1]
+            elif self.is_bool_flag and not self.secondary_opts and not default_value:
+                default_string = ""
+            else:
+                default_string = str(default_value)
+
+            if default_string:
+                extra.append(_("default: {default}").format(default=default_string))
+
+        if (
+            isinstance(self.type, types._NumberRangeBase)
+            # skip count with default range type
+            and not (self.count and self.type.min == 0 and self.type.max is None)
+        ):
+            range_str = self.type._describe_range()
+
+            if range_str:
+                extra.append(range_str)
+
+        if self.required:
+            extra.append(_("required"))
+
+        if extra:
+            extra_str = "; ".join(extra)
+            help = f"{help}  [{extra_str}]" if help else f"[{extra_str}]"
+
+        return ("; " if any_prefix_is_slash else " / ").join(rv), help
+
+    @t.overload
+    def get_default(
+        self, ctx: Context, call: "te.Literal[True]" = True
+    ) -> t.Optional[t.Any]:
+        ...
+
+    @t.overload
+    def get_default(
+        self, ctx: Context, call: bool = ...
+    ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]:
+        ...
+
+    def get_default(
+        self, ctx: Context, call: bool = True
+    ) -> t.Optional[t.Union[t.Any, t.Callable[[], t.Any]]]:
+        # If we're a non boolean flag our default is more complex because
+        # we need to look at all flags in the same group to figure out
+        # if we're the default one in which case we return the flag
+        # value as default.
+        if self.is_flag and not self.is_bool_flag:
+            for param in ctx.command.params:
+                if param.name == self.name and param.default:
+                    return param.flag_value  # type: ignore
+
+            return None
+
+        return super().get_default(ctx, call=call)
+
+    def prompt_for_value(self, ctx: Context) -> t.Any:
+        """This is an alternative flow that can be activated in the full
+        value processing if a value does not exist.  It will prompt the
+        user until a valid value exists and then returns the processed
+        value as result.
+        """
+        assert self.prompt is not None
+
+        # Calculate the default before prompting anything to be stable.
+        default = self.get_default(ctx)
+
+        # If this is a prompt for a flag we need to handle this
+        # differently.
+        if self.is_bool_flag:
+            return confirm(self.prompt, default)
+
+        return prompt(
+            self.prompt,
+            default=default,
+            type=self.type,
+            hide_input=self.hide_input,
+            show_choices=self.show_choices,
+            confirmation_prompt=self.confirmation_prompt,
+            value_proc=lambda x: self.process_value(ctx, x),
+        )
+
+    def resolve_envvar_value(self, ctx: Context) -> t.Optional[str]:
+        rv = super().resolve_envvar_value(ctx)
+
+        if rv is not None:
+            return rv
+
+        if (
+            self.allow_from_autoenv
+            and ctx.auto_envvar_prefix is not None
+            and self.name is not None
+        ):
+            envvar = f"{ctx.auto_envvar_prefix}_{self.name.upper()}"
+            rv = os.environ.get(envvar)
+
+            if rv:
+                return rv
+
+        return None
+
+    def value_from_envvar(self, ctx: Context) -> t.Optional[t.Any]:
+        rv: t.Optional[t.Any] = self.resolve_envvar_value(ctx)
+
+        if rv is None:
+            return None
+
+        value_depth = (self.nargs != 1) + bool(self.multiple)
+
+        if value_depth > 0:
+            rv = self.type.split_envvar_value(rv)
+
+            if self.multiple and self.nargs != 1:
+                rv = batch(rv, self.nargs)
+
+        return rv
+
+    def consume_value(
+        self, ctx: Context, opts: t.Mapping[str, "Parameter"]
+    ) -> t.Tuple[t.Any, ParameterSource]:
+        value, source = super().consume_value(ctx, opts)
+
+        # The parser will emit a sentinel value if the option can be
+        # given as a flag without a value. This is different from None
+        # to distinguish from the flag not being given at all.
+        if value is _flag_needs_value:
+            if self.prompt is not None and not ctx.resilient_parsing:
+                value = self.prompt_for_value(ctx)
+                source = ParameterSource.PROMPT
+            else:
+                value = self.flag_value
+                source = ParameterSource.COMMANDLINE
+
+        elif (
+            self.multiple
+            and value is not None
+            and any(v is _flag_needs_value for v in value)
+        ):
+            value = [self.flag_value if v is _flag_needs_value else v for v in value]
+            source = ParameterSource.COMMANDLINE
+
+        # The value wasn't set, or used the param's default, prompt if
+        # prompting is enabled.
+        elif (
+            source in {None, ParameterSource.DEFAULT}
+            and self.prompt is not None
+            and (self.required or self.prompt_required)
+            and not ctx.resilient_parsing
+        ):
+            value = self.prompt_for_value(ctx)
+            source = ParameterSource.PROMPT
+
+        return value, source
+
+
+class Argument(Parameter):
+    """Arguments are positional parameters to a command.  They generally
+    provide fewer features than options but can have infinite ``nargs``
+    and are required by default.
+
+    All parameters are passed onwards to the parameter constructor.
+    """
+
+    param_type_name = "argument"
+
+    def __init__(
+        self,
+        param_decls: t.Sequence[str],
+        required: t.Optional[bool] = None,
+        **attrs: t.Any,
+    ) -> None:
+        if required is None:
+            if attrs.get("default") is not None:
+                required = False
+            else:
+                required = attrs.get("nargs", 1) > 0
+
+        if "multiple" in attrs:
+            raise TypeError("__init__() got an unexpected keyword argument 'multiple'.")
+
+        super().__init__(param_decls, required=required, **attrs)
+
+        if __debug__:
+            if self.default is not None and self.nargs == -1:
+                raise TypeError("'default' is not supported for nargs=-1.")
+
+    @property
+    def human_readable_name(self) -> str:
+        if self.metavar is not None:
+            return self.metavar
+        return self.name.upper()  # type: ignore
+
+    def make_metavar(self) -> str:
+        if self.metavar is not None:
+            return self.metavar
+        var = self.type.get_metavar(self)
+        if not var:
+            var = self.name.upper()  # type: ignore
+        if not self.required:
+            var = f"[{var}]"
+        if self.nargs != 1:
+            var += "..."
+        return var
+
+    def _parse_decls(
+        self, decls: t.Sequence[str], expose_value: bool
+    ) -> t.Tuple[t.Optional[str], t.List[str], t.List[str]]:
+        if not decls:
+            if not expose_value:
+                return None, [], []
+            raise TypeError("Could not determine name for argument")
+        if len(decls) == 1:
+            name = arg = decls[0]
+            name = name.replace("-", "_").lower()
+        else:
+            raise TypeError(
+                "Arguments take exactly one parameter declaration, got"
+                f" {len(decls)}."
+            )
+        return name, [arg], []
+
+    def get_usage_pieces(self, ctx: Context) -> t.List[str]:
+        return [self.make_metavar()]
+
+    def get_error_hint(self, ctx: Context) -> str:
+        return f"'{self.make_metavar()}'"
+
+    def add_to_parser(self, parser: OptionParser, ctx: Context) -> None:
+        parser.add_argument(dest=self.name, nargs=self.nargs, obj=self)
diff --git a/venv/lib/python3.9/site-packages/click/decorators.py b/venv/lib/python3.9/site-packages/click/decorators.py
new file mode 100644
index 0000000..28618dc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/decorators.py
@@ -0,0 +1,497 @@
+import inspect
+import types
+import typing as t
+from functools import update_wrapper
+from gettext import gettext as _
+
+from .core import Argument
+from .core import Command
+from .core import Context
+from .core import Group
+from .core import Option
+from .core import Parameter
+from .globals import get_current_context
+from .utils import echo
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+FC = t.TypeVar("FC", bound=t.Union[t.Callable[..., t.Any], Command])
+
+
+def pass_context(f: F) -> F:
+    """Marks a callback as wanting to receive the current context
+    object as first argument.
+    """
+
+    def new_func(*args, **kwargs):  # type: ignore
+        return f(get_current_context(), *args, **kwargs)
+
+    return update_wrapper(t.cast(F, new_func), f)
+
+
+def pass_obj(f: F) -> F:
+    """Similar to :func:`pass_context`, but only pass the object on the
+    context onwards (:attr:`Context.obj`).  This is useful if that object
+    represents the state of a nested system.
+    """
+
+    def new_func(*args, **kwargs):  # type: ignore
+        return f(get_current_context().obj, *args, **kwargs)
+
+    return update_wrapper(t.cast(F, new_func), f)
+
+
+def make_pass_decorator(
+    object_type: t.Type, ensure: bool = False
+) -> "t.Callable[[F], F]":
+    """Given an object type this creates a decorator that will work
+    similar to :func:`pass_obj` but instead of passing the object of the
+    current context, it will find the innermost context of type
+    :func:`object_type`.
+
+    This generates a decorator that works roughly like this::
+
+        from functools import update_wrapper
+
+        def decorator(f):
+            @pass_context
+            def new_func(ctx, *args, **kwargs):
+                obj = ctx.find_object(object_type)
+                return ctx.invoke(f, obj, *args, **kwargs)
+            return update_wrapper(new_func, f)
+        return decorator
+
+    :param object_type: the type of the object to pass.
+    :param ensure: if set to `True`, a new object will be created and
+                   remembered on the context if it's not there yet.
+    """
+
+    def decorator(f: F) -> F:
+        def new_func(*args, **kwargs):  # type: ignore
+            ctx = get_current_context()
+
+            if ensure:
+                obj = ctx.ensure_object(object_type)
+            else:
+                obj = ctx.find_object(object_type)
+
+            if obj is None:
+                raise RuntimeError(
+                    "Managed to invoke callback without a context"
+                    f" object of type {object_type.__name__!r}"
+                    " existing."
+                )
+
+            return ctx.invoke(f, obj, *args, **kwargs)
+
+        return update_wrapper(t.cast(F, new_func), f)
+
+    return decorator
+
+
+def pass_meta_key(
+    key: str, *, doc_description: t.Optional[str] = None
+) -> "t.Callable[[F], F]":
+    """Create a decorator that passes a key from
+    :attr:`click.Context.meta` as the first argument to the decorated
+    function.
+
+    :param key: Key in ``Context.meta`` to pass.
+    :param doc_description: Description of the object being passed,
+        inserted into the decorator's docstring. Defaults to "the 'key'
+        key from Context.meta".
+
+    .. versionadded:: 8.0
+    """
+
+    def decorator(f: F) -> F:
+        def new_func(*args, **kwargs):  # type: ignore
+            ctx = get_current_context()
+            obj = ctx.meta[key]
+            return ctx.invoke(f, obj, *args, **kwargs)
+
+        return update_wrapper(t.cast(F, new_func), f)
+
+    if doc_description is None:
+        doc_description = f"the {key!r} key from :attr:`click.Context.meta`"
+
+    decorator.__doc__ = (
+        f"Decorator that passes {doc_description} as the first argument"
+        " to the decorated function."
+    )
+    return decorator
+
+
+CmdType = t.TypeVar("CmdType", bound=Command)
+
+
+@t.overload
+def command(
+    __func: t.Callable[..., t.Any],
+) -> Command:
+    ...
+
+
+@t.overload
+def command(
+    name: t.Optional[str] = None,
+    **attrs: t.Any,
+) -> t.Callable[..., Command]:
+    ...
+
+
+@t.overload
+def command(
+    name: t.Optional[str] = None,
+    cls: t.Type[CmdType] = ...,
+    **attrs: t.Any,
+) -> t.Callable[..., CmdType]:
+    ...
+
+
+def command(
+    name: t.Union[str, t.Callable[..., t.Any], None] = None,
+    cls: t.Optional[t.Type[Command]] = None,
+    **attrs: t.Any,
+) -> t.Union[Command, t.Callable[..., Command]]:
+    r"""Creates a new :class:`Command` and uses the decorated function as
+    callback.  This will also automatically attach all decorated
+    :func:`option`\s and :func:`argument`\s as parameters to the command.
+
+    The name of the command defaults to the name of the function with
+    underscores replaced by dashes.  If you want to change that, you can
+    pass the intended name as the first argument.
+
+    All keyword arguments are forwarded to the underlying command class.
+    For the ``params`` argument, any decorated params are appended to
+    the end of the list.
+
+    Once decorated the function turns into a :class:`Command` instance
+    that can be invoked as a command line utility or be attached to a
+    command :class:`Group`.
+
+    :param name: the name of the command.  This defaults to the function
+                 name with underscores replaced by dashes.
+    :param cls: the command class to instantiate.  This defaults to
+                :class:`Command`.
+
+    .. versionchanged:: 8.1
+        This decorator can be applied without parentheses.
+
+    .. versionchanged:: 8.1
+        The ``params`` argument can be used. Decorated params are
+        appended to the end of the list.
+    """
+
+    func: t.Optional[t.Callable[..., t.Any]] = None
+
+    if callable(name):
+        func = name
+        name = None
+        assert cls is None, "Use 'command(cls=cls)(callable)' to specify a class."
+        assert not attrs, "Use 'command(**kwargs)(callable)' to provide arguments."
+
+    if cls is None:
+        cls = Command
+
+    def decorator(f: t.Callable[..., t.Any]) -> Command:
+        if isinstance(f, Command):
+            raise TypeError("Attempted to convert a callback into a command twice.")
+
+        attr_params = attrs.pop("params", None)
+        params = attr_params if attr_params is not None else []
+
+        try:
+            decorator_params = f.__click_params__  # type: ignore
+        except AttributeError:
+            pass
+        else:
+            del f.__click_params__  # type: ignore
+            params.extend(reversed(decorator_params))
+
+        if attrs.get("help") is None:
+            attrs["help"] = f.__doc__
+
+        cmd = cls(  # type: ignore[misc]
+            name=name or f.__name__.lower().replace("_", "-"),  # type: ignore[arg-type]
+            callback=f,
+            params=params,
+            **attrs,
+        )
+        cmd.__doc__ = f.__doc__
+        return cmd
+
+    if func is not None:
+        return decorator(func)
+
+    return decorator
+
+
+@t.overload
+def group(
+    __func: t.Callable[..., t.Any],
+) -> Group:
+    ...
+
+
+@t.overload
+def group(
+    name: t.Optional[str] = None,
+    **attrs: t.Any,
+) -> t.Callable[[F], Group]:
+    ...
+
+
+def group(
+    name: t.Union[str, t.Callable[..., t.Any], None] = None, **attrs: t.Any
+) -> t.Union[Group, t.Callable[[F], Group]]:
+    """Creates a new :class:`Group` with a function as callback.  This
+    works otherwise the same as :func:`command` just that the `cls`
+    parameter is set to :class:`Group`.
+
+    .. versionchanged:: 8.1
+        This decorator can be applied without parentheses.
+    """
+    if attrs.get("cls") is None:
+        attrs["cls"] = Group
+
+    if callable(name):
+        grp: t.Callable[[F], Group] = t.cast(Group, command(**attrs))
+        return grp(name)
+
+    return t.cast(Group, command(name, **attrs))
+
+
+def _param_memo(f: FC, param: Parameter) -> None:
+    if isinstance(f, Command):
+        f.params.append(param)
+    else:
+        if not hasattr(f, "__click_params__"):
+            f.__click_params__ = []  # type: ignore
+
+        f.__click_params__.append(param)  # type: ignore
+
+
+def argument(*param_decls: str, **attrs: t.Any) -> t.Callable[[FC], FC]:
+    """Attaches an argument to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Argument`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Argument` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the argument class to instantiate.  This defaults to
+                :class:`Argument`.
+    """
+
+    def decorator(f: FC) -> FC:
+        ArgumentClass = attrs.pop("cls", None) or Argument
+        _param_memo(f, ArgumentClass(param_decls, **attrs))
+        return f
+
+    return decorator
+
+
+def option(*param_decls: str, **attrs: t.Any) -> t.Callable[[FC], FC]:
+    """Attaches an option to the command.  All positional arguments are
+    passed as parameter declarations to :class:`Option`; all keyword
+    arguments are forwarded unchanged (except ``cls``).
+    This is equivalent to creating an :class:`Option` instance manually
+    and attaching it to the :attr:`Command.params` list.
+
+    :param cls: the option class to instantiate.  This defaults to
+                :class:`Option`.
+    """
+
+    def decorator(f: FC) -> FC:
+        # Issue 926, copy attrs, so pre-defined options can re-use the same cls=
+        option_attrs = attrs.copy()
+        OptionClass = option_attrs.pop("cls", None) or Option
+        _param_memo(f, OptionClass(param_decls, **option_attrs))
+        return f
+
+    return decorator
+
+
+def confirmation_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]:
+    """Add a ``--yes`` option which shows a prompt before continuing if
+    not passed. If the prompt is declined, the program will exit.
+
+    :param param_decls: One or more option names. Defaults to the single
+        value ``"--yes"``.
+    :param kwargs: Extra arguments are passed to :func:`option`.
+    """
+
+    def callback(ctx: Context, param: Parameter, value: bool) -> None:
+        if not value:
+            ctx.abort()
+
+    if not param_decls:
+        param_decls = ("--yes",)
+
+    kwargs.setdefault("is_flag", True)
+    kwargs.setdefault("callback", callback)
+    kwargs.setdefault("expose_value", False)
+    kwargs.setdefault("prompt", "Do you want to continue?")
+    kwargs.setdefault("help", "Confirm the action without prompting.")
+    return option(*param_decls, **kwargs)
+
+
+def password_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]:
+    """Add a ``--password`` option which prompts for a password, hiding
+    input and asking to enter the value again for confirmation.
+
+    :param param_decls: One or more option names. Defaults to the single
+        value ``"--password"``.
+    :param kwargs: Extra arguments are passed to :func:`option`.
+    """
+    if not param_decls:
+        param_decls = ("--password",)
+
+    kwargs.setdefault("prompt", True)
+    kwargs.setdefault("confirmation_prompt", True)
+    kwargs.setdefault("hide_input", True)
+    return option(*param_decls, **kwargs)
+
+
+def version_option(
+    version: t.Optional[str] = None,
+    *param_decls: str,
+    package_name: t.Optional[str] = None,
+    prog_name: t.Optional[str] = None,
+    message: t.Optional[str] = None,
+    **kwargs: t.Any,
+) -> t.Callable[[FC], FC]:
+    """Add a ``--version`` option which immediately prints the version
+    number and exits the program.
+
+    If ``version`` is not provided, Click will try to detect it using
+    :func:`importlib.metadata.version` to get the version for the
+    ``package_name``. On Python < 3.8, the ``importlib_metadata``
+    backport must be installed.
+
+    If ``package_name`` is not provided, Click will try to detect it by
+    inspecting the stack frames. This will be used to detect the
+    version, so it must match the name of the installed package.
+
+    :param version: The version number to show. If not provided, Click
+        will try to detect it.
+    :param param_decls: One or more option names. Defaults to the single
+        value ``"--version"``.
+    :param package_name: The package name to detect the version from. If
+        not provided, Click will try to detect it.
+    :param prog_name: The name of the CLI to show in the message. If not
+        provided, it will be detected from the command.
+    :param message: The message to show. The values ``%(prog)s``,
+        ``%(package)s``, and ``%(version)s`` are available. Defaults to
+        ``"%(prog)s, version %(version)s"``.
+    :param kwargs: Extra arguments are passed to :func:`option`.
+    :raise RuntimeError: ``version`` could not be detected.
+
+    .. versionchanged:: 8.0
+        Add the ``package_name`` parameter, and the ``%(package)s``
+        value for messages.
+
+    .. versionchanged:: 8.0
+        Use :mod:`importlib.metadata` instead of ``pkg_resources``. The
+        version is detected based on the package name, not the entry
+        point name. The Python package name must match the installed
+        package name, or be passed with ``package_name=``.
+    """
+    if message is None:
+        message = _("%(prog)s, version %(version)s")
+
+    if version is None and package_name is None:
+        frame = inspect.currentframe()
+        f_back = frame.f_back if frame is not None else None
+        f_globals = f_back.f_globals if f_back is not None else None
+        # break reference cycle
+        # https://docs.python.org/3/library/inspect.html#the-interpreter-stack
+        del frame
+
+        if f_globals is not None:
+            package_name = f_globals.get("__name__")
+
+            if package_name == "__main__":
+                package_name = f_globals.get("__package__")
+
+            if package_name:
+                package_name = package_name.partition(".")[0]
+
+    def callback(ctx: Context, param: Parameter, value: bool) -> None:
+        if not value or ctx.resilient_parsing:
+            return
+
+        nonlocal prog_name
+        nonlocal version
+
+        if prog_name is None:
+            prog_name = ctx.find_root().info_name
+
+        if version is None and package_name is not None:
+            metadata: t.Optional[types.ModuleType]
+
+            try:
+                from importlib import metadata  # type: ignore
+            except ImportError:
+                # Python < 3.8
+                import importlib_metadata as metadata  # type: ignore
+
+            try:
+                version = metadata.version(package_name)  # type: ignore
+            except metadata.PackageNotFoundError:  # type: ignore
+                raise RuntimeError(
+                    f"{package_name!r} is not installed. Try passing"
+                    " 'package_name' instead."
+                ) from None
+
+        if version is None:
+            raise RuntimeError(
+                f"Could not determine the version for {package_name!r} automatically."
+            )
+
+        echo(
+            t.cast(str, message)
+            % {"prog": prog_name, "package": package_name, "version": version},
+            color=ctx.color,
+        )
+        ctx.exit()
+
+    if not param_decls:
+        param_decls = ("--version",)
+
+    kwargs.setdefault("is_flag", True)
+    kwargs.setdefault("expose_value", False)
+    kwargs.setdefault("is_eager", True)
+    kwargs.setdefault("help", _("Show the version and exit."))
+    kwargs["callback"] = callback
+    return option(*param_decls, **kwargs)
+
+
+def help_option(*param_decls: str, **kwargs: t.Any) -> t.Callable[[FC], FC]:
+    """Add a ``--help`` option which immediately prints the help page
+    and exits the program.
+
+    This is usually unnecessary, as the ``--help`` option is added to
+    each command automatically unless ``add_help_option=False`` is
+    passed.
+
+    :param param_decls: One or more option names. Defaults to the single
+        value ``"--help"``.
+    :param kwargs: Extra arguments are passed to :func:`option`.
+    """
+
+    def callback(ctx: Context, param: Parameter, value: bool) -> None:
+        if not value or ctx.resilient_parsing:
+            return
+
+        echo(ctx.get_help(), color=ctx.color)
+        ctx.exit()
+
+    if not param_decls:
+        param_decls = ("--help",)
+
+    kwargs.setdefault("is_flag", True)
+    kwargs.setdefault("expose_value", False)
+    kwargs.setdefault("is_eager", True)
+    kwargs.setdefault("help", _("Show this message and exit."))
+    kwargs["callback"] = callback
+    return option(*param_decls, **kwargs)
diff --git a/venv/lib/python3.9/site-packages/click/exceptions.py b/venv/lib/python3.9/site-packages/click/exceptions.py
new file mode 100644
index 0000000..9e20b3e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/exceptions.py
@@ -0,0 +1,287 @@
+import os
+import typing as t
+from gettext import gettext as _
+from gettext import ngettext
+
+from ._compat import get_text_stderr
+from .utils import echo
+
+if t.TYPE_CHECKING:
+    from .core import Context
+    from .core import Parameter
+
+
+def _join_param_hints(
+    param_hint: t.Optional[t.Union[t.Sequence[str], str]]
+) -> t.Optional[str]:
+    if param_hint is not None and not isinstance(param_hint, str):
+        return " / ".join(repr(x) for x in param_hint)
+
+    return param_hint
+
+
+class ClickException(Exception):
+    """An exception that Click can handle and show to the user."""
+
+    #: The exit code for this exception.
+    exit_code = 1
+
+    def __init__(self, message: str) -> None:
+        super().__init__(message)
+        self.message = message
+
+    def format_message(self) -> str:
+        return self.message
+
+    def __str__(self) -> str:
+        return self.message
+
+    def show(self, file: t.Optional[t.IO] = None) -> None:
+        if file is None:
+            file = get_text_stderr()
+
+        echo(_("Error: {message}").format(message=self.format_message()), file=file)
+
+
+class UsageError(ClickException):
+    """An internal exception that signals a usage error.  This typically
+    aborts any further handling.
+
+    :param message: the error message to display.
+    :param ctx: optionally the context that caused this error.  Click will
+                fill in the context automatically in some situations.
+    """
+
+    exit_code = 2
+
+    def __init__(self, message: str, ctx: t.Optional["Context"] = None) -> None:
+        super().__init__(message)
+        self.ctx = ctx
+        self.cmd = self.ctx.command if self.ctx else None
+
+    def show(self, file: t.Optional[t.IO] = None) -> None:
+        if file is None:
+            file = get_text_stderr()
+        color = None
+        hint = ""
+        if (
+            self.ctx is not None
+            and self.ctx.command.get_help_option(self.ctx) is not None
+        ):
+            hint = _("Try '{command} {option}' for help.").format(
+                command=self.ctx.command_path, option=self.ctx.help_option_names[0]
+            )
+            hint = f"{hint}\n"
+        if self.ctx is not None:
+            color = self.ctx.color
+            echo(f"{self.ctx.get_usage()}\n{hint}", file=file, color=color)
+        echo(
+            _("Error: {message}").format(message=self.format_message()),
+            file=file,
+            color=color,
+        )
+
+
+class BadParameter(UsageError):
+    """An exception that formats out a standardized error message for a
+    bad parameter.  This is useful when thrown from a callback or type as
+    Click will attach contextual information to it (for instance, which
+    parameter it is).
+
+    .. versionadded:: 2.0
+
+    :param param: the parameter object that caused this error.  This can
+                  be left out, and Click will attach this info itself
+                  if possible.
+    :param param_hint: a string that shows up as parameter name.  This
+                       can be used as alternative to `param` in cases
+                       where custom validation should happen.  If it is
+                       a string it's used as such, if it's a list then
+                       each item is quoted and separated.
+    """
+
+    def __init__(
+        self,
+        message: str,
+        ctx: t.Optional["Context"] = None,
+        param: t.Optional["Parameter"] = None,
+        param_hint: t.Optional[str] = None,
+    ) -> None:
+        super().__init__(message, ctx)
+        self.param = param
+        self.param_hint = param_hint
+
+    def format_message(self) -> str:
+        if self.param_hint is not None:
+            param_hint = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)  # type: ignore
+        else:
+            return _("Invalid value: {message}").format(message=self.message)
+
+        return _("Invalid value for {param_hint}: {message}").format(
+            param_hint=_join_param_hints(param_hint), message=self.message
+        )
+
+
+class MissingParameter(BadParameter):
+    """Raised if click required an option or argument but it was not
+    provided when invoking the script.
+
+    .. versionadded:: 4.0
+
+    :param param_type: a string that indicates the type of the parameter.
+                       The default is to inherit the parameter type from
+                       the given `param`.  Valid values are ``'parameter'``,
+                       ``'option'`` or ``'argument'``.
+    """
+
+    def __init__(
+        self,
+        message: t.Optional[str] = None,
+        ctx: t.Optional["Context"] = None,
+        param: t.Optional["Parameter"] = None,
+        param_hint: t.Optional[str] = None,
+        param_type: t.Optional[str] = None,
+    ) -> None:
+        super().__init__(message or "", ctx, param, param_hint)
+        self.param_type = param_type
+
+    def format_message(self) -> str:
+        if self.param_hint is not None:
+            param_hint: t.Optional[str] = self.param_hint
+        elif self.param is not None:
+            param_hint = self.param.get_error_hint(self.ctx)  # type: ignore
+        else:
+            param_hint = None
+
+        param_hint = _join_param_hints(param_hint)
+        param_hint = f" {param_hint}" if param_hint else ""
+
+        param_type = self.param_type
+        if param_type is None and self.param is not None:
+            param_type = self.param.param_type_name
+
+        msg = self.message
+        if self.param is not None:
+            msg_extra = self.param.type.get_missing_message(self.param)
+            if msg_extra:
+                if msg:
+                    msg += f". {msg_extra}"
+                else:
+                    msg = msg_extra
+
+        msg = f" {msg}" if msg else ""
+
+        # Translate param_type for known types.
+        if param_type == "argument":
+            missing = _("Missing argument")
+        elif param_type == "option":
+            missing = _("Missing option")
+        elif param_type == "parameter":
+            missing = _("Missing parameter")
+        else:
+            missing = _("Missing {param_type}").format(param_type=param_type)
+
+        return f"{missing}{param_hint}.{msg}"
+
+    def __str__(self) -> str:
+        if not self.message:
+            param_name = self.param.name if self.param else None
+            return _("Missing parameter: {param_name}").format(param_name=param_name)
+        else:
+            return self.message
+
+
+class NoSuchOption(UsageError):
+    """Raised if click attempted to handle an option that does not
+    exist.
+
+    .. versionadded:: 4.0
+    """
+
+    def __init__(
+        self,
+        option_name: str,
+        message: t.Optional[str] = None,
+        possibilities: t.Optional[t.Sequence[str]] = None,
+        ctx: t.Optional["Context"] = None,
+    ) -> None:
+        if message is None:
+            message = _("No such option: {name}").format(name=option_name)
+
+        super().__init__(message, ctx)
+        self.option_name = option_name
+        self.possibilities = possibilities
+
+    def format_message(self) -> str:
+        if not self.possibilities:
+            return self.message
+
+        possibility_str = ", ".join(sorted(self.possibilities))
+        suggest = ngettext(
+            "Did you mean {possibility}?",
+            "(Possible options: {possibilities})",
+            len(self.possibilities),
+        ).format(possibility=possibility_str, possibilities=possibility_str)
+        return f"{self.message} {suggest}"
+
+
+class BadOptionUsage(UsageError):
+    """Raised if an option is generally supplied but the use of the option
+    was incorrect.  This is for instance raised if the number of arguments
+    for an option is not correct.
+
+    .. versionadded:: 4.0
+
+    :param option_name: the name of the option being used incorrectly.
+    """
+
+    def __init__(
+        self, option_name: str, message: str, ctx: t.Optional["Context"] = None
+    ) -> None:
+        super().__init__(message, ctx)
+        self.option_name = option_name
+
+
+class BadArgumentUsage(UsageError):
+    """Raised if an argument is generally supplied but the use of the argument
+    was incorrect.  This is for instance raised if the number of values
+    for an argument is not correct.
+
+    .. versionadded:: 6.0
+    """
+
+
+class FileError(ClickException):
+    """Raised if a file cannot be opened."""
+
+    def __init__(self, filename: str, hint: t.Optional[str] = None) -> None:
+        if hint is None:
+            hint = _("unknown error")
+
+        super().__init__(hint)
+        self.ui_filename = os.fsdecode(filename)
+        self.filename = filename
+
+    def format_message(self) -> str:
+        return _("Could not open file {filename!r}: {message}").format(
+            filename=self.ui_filename, message=self.message
+        )
+
+
+class Abort(RuntimeError):
+    """An internal signalling exception that signals Click to abort."""
+
+
+class Exit(RuntimeError):
+    """An exception that indicates that the application should exit with some
+    status code.
+
+    :param code: the status code to exit with.
+    """
+
+    __slots__ = ("exit_code",)
+
+    def __init__(self, code: int = 0) -> None:
+        self.exit_code = code
diff --git a/venv/lib/python3.9/site-packages/click/formatting.py b/venv/lib/python3.9/site-packages/click/formatting.py
new file mode 100644
index 0000000..ddd2a2f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/formatting.py
@@ -0,0 +1,301 @@
+import typing as t
+from contextlib import contextmanager
+from gettext import gettext as _
+
+from ._compat import term_len
+from .parser import split_opt
+
+# Can force a width.  This is used by the test system
+FORCED_WIDTH: t.Optional[int] = None
+
+
+def measure_table(rows: t.Iterable[t.Tuple[str, str]]) -> t.Tuple[int, ...]:
+    widths: t.Dict[int, int] = {}
+
+    for row in rows:
+        for idx, col in enumerate(row):
+            widths[idx] = max(widths.get(idx, 0), term_len(col))
+
+    return tuple(y for x, y in sorted(widths.items()))
+
+
+def iter_rows(
+    rows: t.Iterable[t.Tuple[str, str]], col_count: int
+) -> t.Iterator[t.Tuple[str, ...]]:
+    for row in rows:
+        yield row + ("",) * (col_count - len(row))
+
+
+def wrap_text(
+    text: str,
+    width: int = 78,
+    initial_indent: str = "",
+    subsequent_indent: str = "",
+    preserve_paragraphs: bool = False,
+) -> str:
+    """A helper function that intelligently wraps text.  By default, it
+    assumes that it operates on a single paragraph of text but if the
+    `preserve_paragraphs` parameter is provided it will intelligently
+    handle paragraphs (defined by two empty lines).
+
+    If paragraphs are handled, a paragraph can be prefixed with an empty
+    line containing the ``\\b`` character (``\\x08``) to indicate that
+    no rewrapping should happen in that block.
+
+    :param text: the text that should be rewrapped.
+    :param width: the maximum width for the text.
+    :param initial_indent: the initial indent that should be placed on the
+                           first line as a string.
+    :param subsequent_indent: the indent string that should be placed on
+                              each consecutive line.
+    :param preserve_paragraphs: if this flag is set then the wrapping will
+                                intelligently handle paragraphs.
+    """
+    from ._textwrap import TextWrapper
+
+    text = text.expandtabs()
+    wrapper = TextWrapper(
+        width,
+        initial_indent=initial_indent,
+        subsequent_indent=subsequent_indent,
+        replace_whitespace=False,
+    )
+    if not preserve_paragraphs:
+        return wrapper.fill(text)
+
+    p: t.List[t.Tuple[int, bool, str]] = []
+    buf: t.List[str] = []
+    indent = None
+
+    def _flush_par() -> None:
+        if not buf:
+            return
+        if buf[0].strip() == "\b":
+            p.append((indent or 0, True, "\n".join(buf[1:])))
+        else:
+            p.append((indent or 0, False, " ".join(buf)))
+        del buf[:]
+
+    for line in text.splitlines():
+        if not line:
+            _flush_par()
+            indent = None
+        else:
+            if indent is None:
+                orig_len = term_len(line)
+                line = line.lstrip()
+                indent = orig_len - term_len(line)
+            buf.append(line)
+    _flush_par()
+
+    rv = []
+    for indent, raw, text in p:
+        with wrapper.extra_indent(" " * indent):
+            if raw:
+                rv.append(wrapper.indent_only(text))
+            else:
+                rv.append(wrapper.fill(text))
+
+    return "\n\n".join(rv)
+
+
+class HelpFormatter:
+    """This class helps with formatting text-based help pages.  It's
+    usually just needed for very special internal cases, but it's also
+    exposed so that developers can write their own fancy outputs.
+
+    At present, it always writes into memory.
+
+    :param indent_increment: the additional increment for each level.
+    :param width: the width for the text.  This defaults to the terminal
+                  width clamped to a maximum of 78.
+    """
+
+    def __init__(
+        self,
+        indent_increment: int = 2,
+        width: t.Optional[int] = None,
+        max_width: t.Optional[int] = None,
+    ) -> None:
+        import shutil
+
+        self.indent_increment = indent_increment
+        if max_width is None:
+            max_width = 80
+        if width is None:
+            width = FORCED_WIDTH
+            if width is None:
+                width = max(min(shutil.get_terminal_size().columns, max_width) - 2, 50)
+        self.width = width
+        self.current_indent = 0
+        self.buffer: t.List[str] = []
+
+    def write(self, string: str) -> None:
+        """Writes a unicode string into the internal buffer."""
+        self.buffer.append(string)
+
+    def indent(self) -> None:
+        """Increases the indentation."""
+        self.current_indent += self.indent_increment
+
+    def dedent(self) -> None:
+        """Decreases the indentation."""
+        self.current_indent -= self.indent_increment
+
+    def write_usage(
+        self, prog: str, args: str = "", prefix: t.Optional[str] = None
+    ) -> None:
+        """Writes a usage line into the buffer.
+
+        :param prog: the program name.
+        :param args: whitespace separated list of arguments.
+        :param prefix: The prefix for the first line. Defaults to
+            ``"Usage: "``.
+        """
+        if prefix is None:
+            prefix = f"{_('Usage:')} "
+
+        usage_prefix = f"{prefix:>{self.current_indent}}{prog} "
+        text_width = self.width - self.current_indent
+
+        if text_width >= (term_len(usage_prefix) + 20):
+            # The arguments will fit to the right of the prefix.
+            indent = " " * term_len(usage_prefix)
+            self.write(
+                wrap_text(
+                    args,
+                    text_width,
+                    initial_indent=usage_prefix,
+                    subsequent_indent=indent,
+                )
+            )
+        else:
+            # The prefix is too long, put the arguments on the next line.
+            self.write(usage_prefix)
+            self.write("\n")
+            indent = " " * (max(self.current_indent, term_len(prefix)) + 4)
+            self.write(
+                wrap_text(
+                    args, text_width, initial_indent=indent, subsequent_indent=indent
+                )
+            )
+
+        self.write("\n")
+
+    def write_heading(self, heading: str) -> None:
+        """Writes a heading into the buffer."""
+        self.write(f"{'':>{self.current_indent}}{heading}:\n")
+
+    def write_paragraph(self) -> None:
+        """Writes a paragraph into the buffer."""
+        if self.buffer:
+            self.write("\n")
+
+    def write_text(self, text: str) -> None:
+        """Writes re-indented text into the buffer.  This rewraps and
+        preserves paragraphs.
+        """
+        indent = " " * self.current_indent
+        self.write(
+            wrap_text(
+                text,
+                self.width,
+                initial_indent=indent,
+                subsequent_indent=indent,
+                preserve_paragraphs=True,
+            )
+        )
+        self.write("\n")
+
+    def write_dl(
+        self,
+        rows: t.Sequence[t.Tuple[str, str]],
+        col_max: int = 30,
+        col_spacing: int = 2,
+    ) -> None:
+        """Writes a definition list into the buffer.  This is how options
+        and commands are usually formatted.
+
+        :param rows: a list of two item tuples for the terms and values.
+        :param col_max: the maximum width of the first column.
+        :param col_spacing: the number of spaces between the first and
+                            second column.
+        """
+        rows = list(rows)
+        widths = measure_table(rows)
+        if len(widths) != 2:
+            raise TypeError("Expected two columns for definition list")
+
+        first_col = min(widths[0], col_max) + col_spacing
+
+        for first, second in iter_rows(rows, len(widths)):
+            self.write(f"{'':>{self.current_indent}}{first}")
+            if not second:
+                self.write("\n")
+                continue
+            if term_len(first) <= first_col - col_spacing:
+                self.write(" " * (first_col - term_len(first)))
+            else:
+                self.write("\n")
+                self.write(" " * (first_col + self.current_indent))
+
+            text_width = max(self.width - first_col - 2, 10)
+            wrapped_text = wrap_text(second, text_width, preserve_paragraphs=True)
+            lines = wrapped_text.splitlines()
+
+            if lines:
+                self.write(f"{lines[0]}\n")
+
+                for line in lines[1:]:
+                    self.write(f"{'':>{first_col + self.current_indent}}{line}\n")
+            else:
+                self.write("\n")
+
+    @contextmanager
+    def section(self, name: str) -> t.Iterator[None]:
+        """Helpful context manager that writes a paragraph, a heading,
+        and the indents.
+
+        :param name: the section name that is written as heading.
+        """
+        self.write_paragraph()
+        self.write_heading(name)
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    @contextmanager
+    def indentation(self) -> t.Iterator[None]:
+        """A context manager that increases the indentation."""
+        self.indent()
+        try:
+            yield
+        finally:
+            self.dedent()
+
+    def getvalue(self) -> str:
+        """Returns the buffer contents."""
+        return "".join(self.buffer)
+
+
+def join_options(options: t.Sequence[str]) -> t.Tuple[str, bool]:
+    """Given a list of option strings this joins them in the most appropriate
+    way and returns them in the form ``(formatted_string,
+    any_prefix_is_slash)`` where the second item in the tuple is a flag that
+    indicates if any of the option prefixes was a slash.
+    """
+    rv = []
+    any_prefix_is_slash = False
+
+    for opt in options:
+        prefix = split_opt(opt)[0]
+
+        if prefix == "/":
+            any_prefix_is_slash = True
+
+        rv.append((len(prefix), opt))
+
+    rv.sort(key=lambda x: x[0])
+    return ", ".join(x[1] for x in rv), any_prefix_is_slash
diff --git a/venv/lib/python3.9/site-packages/click/globals.py b/venv/lib/python3.9/site-packages/click/globals.py
new file mode 100644
index 0000000..480058f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/globals.py
@@ -0,0 +1,68 @@
+import typing as t
+from threading import local
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .core import Context
+
+_local = local()
+
+
+@t.overload
+def get_current_context(silent: "te.Literal[False]" = False) -> "Context":
+    ...
+
+
+@t.overload
+def get_current_context(silent: bool = ...) -> t.Optional["Context"]:
+    ...
+
+
+def get_current_context(silent: bool = False) -> t.Optional["Context"]:
+    """Returns the current click context.  This can be used as a way to
+    access the current context object from anywhere.  This is a more implicit
+    alternative to the :func:`pass_context` decorator.  This function is
+    primarily useful for helpers such as :func:`echo` which might be
+    interested in changing its behavior based on the current context.
+
+    To push the current context, :meth:`Context.scope` can be used.
+
+    .. versionadded:: 5.0
+
+    :param silent: if set to `True` the return value is `None` if no context
+                   is available.  The default behavior is to raise a
+                   :exc:`RuntimeError`.
+    """
+    try:
+        return t.cast("Context", _local.stack[-1])
+    except (AttributeError, IndexError) as e:
+        if not silent:
+            raise RuntimeError("There is no active click context.") from e
+
+    return None
+
+
+def push_context(ctx: "Context") -> None:
+    """Pushes a new context to the current stack."""
+    _local.__dict__.setdefault("stack", []).append(ctx)
+
+
+def pop_context() -> None:
+    """Removes the top level from the stack."""
+    _local.stack.pop()
+
+
+def resolve_color_default(color: t.Optional[bool] = None) -> t.Optional[bool]:
+    """Internal helper to get the default value of the color flag.  If a
+    value is passed it's returned unchanged, otherwise it's looked up from
+    the current context.
+    """
+    if color is not None:
+        return color
+
+    ctx = get_current_context(silent=True)
+
+    if ctx is not None:
+        return ctx.color
+
+    return None
diff --git a/venv/lib/python3.9/site-packages/click/parser.py b/venv/lib/python3.9/site-packages/click/parser.py
new file mode 100644
index 0000000..2d5a2ed
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/parser.py
@@ -0,0 +1,529 @@
+"""
+This module started out as largely a copy paste from the stdlib's
+optparse module with the features removed that we do not need from
+optparse because we implement them in Click on a higher level (for
+instance type handling, help formatting and a lot more).
+
+The plan is to remove more and more from here over time.
+
+The reason this is a different module and not optparse from the stdlib
+is that there are differences in 2.x and 3.x about the error messages
+generated and optparse in the stdlib uses gettext for no good reason
+and might cause us issues.
+
+Click uses parts of optparse written by Gregory P. Ward and maintained
+by the Python Software Foundation. This is limited to code in parser.py.
+
+Copyright 2001-2006 Gregory P. Ward. All rights reserved.
+Copyright 2002-2006 Python Software Foundation. All rights reserved.
+"""
+# This code uses parts of optparse written by Gregory P. Ward and
+# maintained by the Python Software Foundation.
+# Copyright 2001-2006 Gregory P. Ward
+# Copyright 2002-2006 Python Software Foundation
+import typing as t
+from collections import deque
+from gettext import gettext as _
+from gettext import ngettext
+
+from .exceptions import BadArgumentUsage
+from .exceptions import BadOptionUsage
+from .exceptions import NoSuchOption
+from .exceptions import UsageError
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .core import Argument as CoreArgument
+    from .core import Context
+    from .core import Option as CoreOption
+    from .core import Parameter as CoreParameter
+
+V = t.TypeVar("V")
+
+# Sentinel value that indicates an option was passed as a flag without a
+# value but is not a flag option. Option.consume_value uses this to
+# prompt or use the flag_value.
+_flag_needs_value = object()
+
+
+def _unpack_args(
+    args: t.Sequence[str], nargs_spec: t.Sequence[int]
+) -> t.Tuple[t.Sequence[t.Union[str, t.Sequence[t.Optional[str]], None]], t.List[str]]:
+    """Given an iterable of arguments and an iterable of nargs specifications,
+    it returns a tuple with all the unpacked arguments at the first index
+    and all remaining arguments as the second.
+
+    The nargs specification is the number of arguments that should be consumed
+    or `-1` to indicate that this position should eat up all the remainders.
+
+    Missing items are filled with `None`.
+    """
+    args = deque(args)
+    nargs_spec = deque(nargs_spec)
+    rv: t.List[t.Union[str, t.Tuple[t.Optional[str], ...], None]] = []
+    spos: t.Optional[int] = None
+
+    def _fetch(c: "te.Deque[V]") -> t.Optional[V]:
+        try:
+            if spos is None:
+                return c.popleft()
+            else:
+                return c.pop()
+        except IndexError:
+            return None
+
+    while nargs_spec:
+        nargs = _fetch(nargs_spec)
+
+        if nargs is None:
+            continue
+
+        if nargs == 1:
+            rv.append(_fetch(args))
+        elif nargs > 1:
+            x = [_fetch(args) for _ in range(nargs)]
+
+            # If we're reversed, we're pulling in the arguments in reverse,
+            # so we need to turn them around.
+            if spos is not None:
+                x.reverse()
+
+            rv.append(tuple(x))
+        elif nargs < 0:
+            if spos is not None:
+                raise TypeError("Cannot have two nargs < 0")
+
+            spos = len(rv)
+            rv.append(None)
+
+    # spos is the position of the wildcard (star).  If it's not `None`,
+    # we fill it with the remainder.
+    if spos is not None:
+        rv[spos] = tuple(args)
+        args = []
+        rv[spos + 1 :] = reversed(rv[spos + 1 :])
+
+    return tuple(rv), list(args)
+
+
+def split_opt(opt: str) -> t.Tuple[str, str]:
+    first = opt[:1]
+    if first.isalnum():
+        return "", opt
+    if opt[1:2] == first:
+        return opt[:2], opt[2:]
+    return first, opt[1:]
+
+
+def normalize_opt(opt: str, ctx: t.Optional["Context"]) -> str:
+    if ctx is None or ctx.token_normalize_func is None:
+        return opt
+    prefix, opt = split_opt(opt)
+    return f"{prefix}{ctx.token_normalize_func(opt)}"
+
+
+def split_arg_string(string: str) -> t.List[str]:
+    """Split an argument string as with :func:`shlex.split`, but don't
+    fail if the string is incomplete. Ignores a missing closing quote or
+    incomplete escape sequence and uses the partial token as-is.
+
+    .. code-block:: python
+
+        split_arg_string("example 'my file")
+        ["example", "my file"]
+
+        split_arg_string("example my\\")
+        ["example", "my"]
+
+    :param string: String to split.
+    """
+    import shlex
+
+    lex = shlex.shlex(string, posix=True)
+    lex.whitespace_split = True
+    lex.commenters = ""
+    out = []
+
+    try:
+        for token in lex:
+            out.append(token)
+    except ValueError:
+        # Raised when end-of-string is reached in an invalid state. Use
+        # the partial token as-is. The quote or escape character is in
+        # lex.state, not lex.token.
+        out.append(lex.token)
+
+    return out
+
+
+class Option:
+    def __init__(
+        self,
+        obj: "CoreOption",
+        opts: t.Sequence[str],
+        dest: t.Optional[str],
+        action: t.Optional[str] = None,
+        nargs: int = 1,
+        const: t.Optional[t.Any] = None,
+    ):
+        self._short_opts = []
+        self._long_opts = []
+        self.prefixes = set()
+
+        for opt in opts:
+            prefix, value = split_opt(opt)
+            if not prefix:
+                raise ValueError(f"Invalid start character for option ({opt})")
+            self.prefixes.add(prefix[0])
+            if len(prefix) == 1 and len(value) == 1:
+                self._short_opts.append(opt)
+            else:
+                self._long_opts.append(opt)
+                self.prefixes.add(prefix)
+
+        if action is None:
+            action = "store"
+
+        self.dest = dest
+        self.action = action
+        self.nargs = nargs
+        self.const = const
+        self.obj = obj
+
+    @property
+    def takes_value(self) -> bool:
+        return self.action in ("store", "append")
+
+    def process(self, value: str, state: "ParsingState") -> None:
+        if self.action == "store":
+            state.opts[self.dest] = value  # type: ignore
+        elif self.action == "store_const":
+            state.opts[self.dest] = self.const  # type: ignore
+        elif self.action == "append":
+            state.opts.setdefault(self.dest, []).append(value)  # type: ignore
+        elif self.action == "append_const":
+            state.opts.setdefault(self.dest, []).append(self.const)  # type: ignore
+        elif self.action == "count":
+            state.opts[self.dest] = state.opts.get(self.dest, 0) + 1  # type: ignore
+        else:
+            raise ValueError(f"unknown action '{self.action}'")
+        state.order.append(self.obj)
+
+
+class Argument:
+    def __init__(self, obj: "CoreArgument", dest: t.Optional[str], nargs: int = 1):
+        self.dest = dest
+        self.nargs = nargs
+        self.obj = obj
+
+    def process(
+        self,
+        value: t.Union[t.Optional[str], t.Sequence[t.Optional[str]]],
+        state: "ParsingState",
+    ) -> None:
+        if self.nargs > 1:
+            assert value is not None
+            holes = sum(1 for x in value if x is None)
+            if holes == len(value):
+                value = None
+            elif holes != 0:
+                raise BadArgumentUsage(
+                    _("Argument {name!r} takes {nargs} values.").format(
+                        name=self.dest, nargs=self.nargs
+                    )
+                )
+
+        if self.nargs == -1 and self.obj.envvar is not None and value == ():
+            # Replace empty tuple with None so that a value from the
+            # environment may be tried.
+            value = None
+
+        state.opts[self.dest] = value  # type: ignore
+        state.order.append(self.obj)
+
+
+class ParsingState:
+    def __init__(self, rargs: t.List[str]) -> None:
+        self.opts: t.Dict[str, t.Any] = {}
+        self.largs: t.List[str] = []
+        self.rargs = rargs
+        self.order: t.List["CoreParameter"] = []
+
+
+class OptionParser:
+    """The option parser is an internal class that is ultimately used to
+    parse options and arguments.  It's modelled after optparse and brings
+    a similar but vastly simplified API.  It should generally not be used
+    directly as the high level Click classes wrap it for you.
+
+    It's not nearly as extensible as optparse or argparse as it does not
+    implement features that are implemented on a higher level (such as
+    types or defaults).
+
+    :param ctx: optionally the :class:`~click.Context` where this parser
+                should go with.
+    """
+
+    def __init__(self, ctx: t.Optional["Context"] = None) -> None:
+        #: The :class:`~click.Context` for this parser.  This might be
+        #: `None` for some advanced use cases.
+        self.ctx = ctx
+        #: This controls how the parser deals with interspersed arguments.
+        #: If this is set to `False`, the parser will stop on the first
+        #: non-option.  Click uses this to implement nested subcommands
+        #: safely.
+        self.allow_interspersed_args = True
+        #: This tells the parser how to deal with unknown options.  By
+        #: default it will error out (which is sensible), but there is a
+        #: second mode where it will ignore it and continue processing
+        #: after shifting all the unknown options into the resulting args.
+        self.ignore_unknown_options = False
+
+        if ctx is not None:
+            self.allow_interspersed_args = ctx.allow_interspersed_args
+            self.ignore_unknown_options = ctx.ignore_unknown_options
+
+        self._short_opt: t.Dict[str, Option] = {}
+        self._long_opt: t.Dict[str, Option] = {}
+        self._opt_prefixes = {"-", "--"}
+        self._args: t.List[Argument] = []
+
+    def add_option(
+        self,
+        obj: "CoreOption",
+        opts: t.Sequence[str],
+        dest: t.Optional[str],
+        action: t.Optional[str] = None,
+        nargs: int = 1,
+        const: t.Optional[t.Any] = None,
+    ) -> None:
+        """Adds a new option named `dest` to the parser.  The destination
+        is not inferred (unlike with optparse) and needs to be explicitly
+        provided.  Action can be any of ``store``, ``store_const``,
+        ``append``, ``append_const`` or ``count``.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        opts = [normalize_opt(opt, self.ctx) for opt in opts]
+        option = Option(obj, opts, dest, action=action, nargs=nargs, const=const)
+        self._opt_prefixes.update(option.prefixes)
+        for opt in option._short_opts:
+            self._short_opt[opt] = option
+        for opt in option._long_opts:
+            self._long_opt[opt] = option
+
+    def add_argument(
+        self, obj: "CoreArgument", dest: t.Optional[str], nargs: int = 1
+    ) -> None:
+        """Adds a positional argument named `dest` to the parser.
+
+        The `obj` can be used to identify the option in the order list
+        that is returned from the parser.
+        """
+        self._args.append(Argument(obj, dest=dest, nargs=nargs))
+
+    def parse_args(
+        self, args: t.List[str]
+    ) -> t.Tuple[t.Dict[str, t.Any], t.List[str], t.List["CoreParameter"]]:
+        """Parses positional arguments and returns ``(values, args, order)``
+        for the parsed options and arguments as well as the leftover
+        arguments if there are any.  The order is a list of objects as they
+        appear on the command line.  If arguments appear multiple times they
+        will be memorized multiple times as well.
+        """
+        state = ParsingState(args)
+        try:
+            self._process_args_for_options(state)
+            self._process_args_for_args(state)
+        except UsageError:
+            if self.ctx is None or not self.ctx.resilient_parsing:
+                raise
+        return state.opts, state.largs, state.order
+
+    def _process_args_for_args(self, state: ParsingState) -> None:
+        pargs, args = _unpack_args(
+            state.largs + state.rargs, [x.nargs for x in self._args]
+        )
+
+        for idx, arg in enumerate(self._args):
+            arg.process(pargs[idx], state)
+
+        state.largs = args
+        state.rargs = []
+
+    def _process_args_for_options(self, state: ParsingState) -> None:
+        while state.rargs:
+            arg = state.rargs.pop(0)
+            arglen = len(arg)
+            # Double dashes always handled explicitly regardless of what
+            # prefixes are valid.
+            if arg == "--":
+                return
+            elif arg[:1] in self._opt_prefixes and arglen > 1:
+                self._process_opts(arg, state)
+            elif self.allow_interspersed_args:
+                state.largs.append(arg)
+            else:
+                state.rargs.insert(0, arg)
+                return
+
+        # Say this is the original argument list:
+        # [arg0, arg1, ..., arg(i-1), arg(i), arg(i+1), ..., arg(N-1)]
+        #                            ^
+        # (we are about to process arg(i)).
+        #
+        # Then rargs is [arg(i), ..., arg(N-1)] and largs is a *subset* of
+        # [arg0, ..., arg(i-1)] (any options and their arguments will have
+        # been removed from largs).
+        #
+        # The while loop will usually consume 1 or more arguments per pass.
+        # If it consumes 1 (eg. arg is an option that takes no arguments),
+        # then after _process_arg() is done the situation is:
+        #
+        #   largs = subset of [arg0, ..., arg(i)]
+        #   rargs = [arg(i+1), ..., arg(N-1)]
+        #
+        # If allow_interspersed_args is false, largs will always be
+        # *empty* -- still a subset of [arg0, ..., arg(i-1)], but
+        # not a very interesting subset!
+
+    def _match_long_opt(
+        self, opt: str, explicit_value: t.Optional[str], state: ParsingState
+    ) -> None:
+        if opt not in self._long_opt:
+            from difflib import get_close_matches
+
+            possibilities = get_close_matches(opt, self._long_opt)
+            raise NoSuchOption(opt, possibilities=possibilities, ctx=self.ctx)
+
+        option = self._long_opt[opt]
+        if option.takes_value:
+            # At this point it's safe to modify rargs by injecting the
+            # explicit value, because no exception is raised in this
+            # branch.  This means that the inserted value will be fully
+            # consumed.
+            if explicit_value is not None:
+                state.rargs.insert(0, explicit_value)
+
+            value = self._get_value_from_state(opt, option, state)
+
+        elif explicit_value is not None:
+            raise BadOptionUsage(
+                opt, _("Option {name!r} does not take a value.").format(name=opt)
+            )
+
+        else:
+            value = None
+
+        option.process(value, state)
+
+    def _match_short_opt(self, arg: str, state: ParsingState) -> None:
+        stop = False
+        i = 1
+        prefix = arg[0]
+        unknown_options = []
+
+        for ch in arg[1:]:
+            opt = normalize_opt(f"{prefix}{ch}", self.ctx)
+            option = self._short_opt.get(opt)
+            i += 1
+
+            if not option:
+                if self.ignore_unknown_options:
+                    unknown_options.append(ch)
+                    continue
+                raise NoSuchOption(opt, ctx=self.ctx)
+            if option.takes_value:
+                # Any characters left in arg?  Pretend they're the
+                # next arg, and stop consuming characters of arg.
+                if i < len(arg):
+                    state.rargs.insert(0, arg[i:])
+                    stop = True
+
+                value = self._get_value_from_state(opt, option, state)
+
+            else:
+                value = None
+
+            option.process(value, state)
+
+            if stop:
+                break
+
+        # If we got any unknown options we re-combinate the string of the
+        # remaining options and re-attach the prefix, then report that
+        # to the state as new larg.  This way there is basic combinatorics
+        # that can be achieved while still ignoring unknown arguments.
+        if self.ignore_unknown_options and unknown_options:
+            state.largs.append(f"{prefix}{''.join(unknown_options)}")
+
+    def _get_value_from_state(
+        self, option_name: str, option: Option, state: ParsingState
+    ) -> t.Any:
+        nargs = option.nargs
+
+        if len(state.rargs) < nargs:
+            if option.obj._flag_needs_value:
+                # Option allows omitting the value.
+                value = _flag_needs_value
+            else:
+                raise BadOptionUsage(
+                    option_name,
+                    ngettext(
+                        "Option {name!r} requires an argument.",
+                        "Option {name!r} requires {nargs} arguments.",
+                        nargs,
+                    ).format(name=option_name, nargs=nargs),
+                )
+        elif nargs == 1:
+            next_rarg = state.rargs[0]
+
+            if (
+                option.obj._flag_needs_value
+                and isinstance(next_rarg, str)
+                and next_rarg[:1] in self._opt_prefixes
+                and len(next_rarg) > 1
+            ):
+                # The next arg looks like the start of an option, don't
+                # use it as the value if omitting the value is allowed.
+                value = _flag_needs_value
+            else:
+                value = state.rargs.pop(0)
+        else:
+            value = tuple(state.rargs[:nargs])
+            del state.rargs[:nargs]
+
+        return value
+
+    def _process_opts(self, arg: str, state: ParsingState) -> None:
+        explicit_value = None
+        # Long option handling happens in two parts.  The first part is
+        # supporting explicitly attached values.  In any case, we will try
+        # to long match the option first.
+        if "=" in arg:
+            long_opt, explicit_value = arg.split("=", 1)
+        else:
+            long_opt = arg
+        norm_long_opt = normalize_opt(long_opt, self.ctx)
+
+        # At this point we will match the (assumed) long option through
+        # the long option matching code.  Note that this allows options
+        # like "-foo" to be matched as long options.
+        try:
+            self._match_long_opt(norm_long_opt, explicit_value, state)
+        except NoSuchOption:
+            # At this point the long option matching failed, and we need
+            # to try with short options.  However there is a special rule
+            # which says, that if we have a two character options prefix
+            # (applies to "--foo" for instance), we do not dispatch to the
+            # short option code and will instead raise the no option
+            # error.
+            if arg[:2] not in self._opt_prefixes:
+                self._match_short_opt(arg, state)
+                return
+
+            if not self.ignore_unknown_options:
+                raise
+
+            state.largs.append(arg)
diff --git a/venv/lib/python3.9/site-packages/click/py.typed b/venv/lib/python3.9/site-packages/click/py.typed
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/py.typed
diff --git a/venv/lib/python3.9/site-packages/click/shell_completion.py b/venv/lib/python3.9/site-packages/click/shell_completion.py
new file mode 100644
index 0000000..c17a8e6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/shell_completion.py
@@ -0,0 +1,580 @@
+import os
+import re
+import typing as t
+from gettext import gettext as _
+
+from .core import Argument
+from .core import BaseCommand
+from .core import Context
+from .core import MultiCommand
+from .core import Option
+from .core import Parameter
+from .core import ParameterSource
+from .parser import split_arg_string
+from .utils import echo
+
+
+def shell_complete(
+    cli: BaseCommand,
+    ctx_args: t.Dict[str, t.Any],
+    prog_name: str,
+    complete_var: str,
+    instruction: str,
+) -> int:
+    """Perform shell completion for the given CLI program.
+
+    :param cli: Command being called.
+    :param ctx_args: Extra arguments to pass to
+        ``cli.make_context``.
+    :param prog_name: Name of the executable in the shell.
+    :param complete_var: Name of the environment variable that holds
+        the completion instruction.
+    :param instruction: Value of ``complete_var`` with the completion
+        instruction and shell, in the form ``instruction_shell``.
+    :return: Status code to exit with.
+    """
+    shell, _, instruction = instruction.partition("_")
+    comp_cls = get_completion_class(shell)
+
+    if comp_cls is None:
+        return 1
+
+    comp = comp_cls(cli, ctx_args, prog_name, complete_var)
+
+    if instruction == "source":
+        echo(comp.source())
+        return 0
+
+    if instruction == "complete":
+        echo(comp.complete())
+        return 0
+
+    return 1
+
+
+class CompletionItem:
+    """Represents a completion value and metadata about the value. The
+    default metadata is ``type`` to indicate special shell handling,
+    and ``help`` if a shell supports showing a help string next to the
+    value.
+
+    Arbitrary parameters can be passed when creating the object, and
+    accessed using ``item.attr``. If an attribute wasn't passed,
+    accessing it returns ``None``.
+
+    :param value: The completion suggestion.
+    :param type: Tells the shell script to provide special completion
+        support for the type. Click uses ``"dir"`` and ``"file"``.
+    :param help: String shown next to the value if supported.
+    :param kwargs: Arbitrary metadata. The built-in implementations
+        don't use this, but custom type completions paired with custom
+        shell support could use it.
+    """
+
+    __slots__ = ("value", "type", "help", "_info")
+
+    def __init__(
+        self,
+        value: t.Any,
+        type: str = "plain",
+        help: t.Optional[str] = None,
+        **kwargs: t.Any,
+    ) -> None:
+        self.value = value
+        self.type = type
+        self.help = help
+        self._info = kwargs
+
+    def __getattr__(self, name: str) -> t.Any:
+        return self._info.get(name)
+
+
+# Only Bash >= 4.4 has the nosort option.
+_SOURCE_BASH = """\
+%(complete_func)s() {
+    local IFS=$'\\n'
+    local response
+
+    response=$(env COMP_WORDS="${COMP_WORDS[*]}" COMP_CWORD=$COMP_CWORD \
+%(complete_var)s=bash_complete $1)
+
+    for completion in $response; do
+        IFS=',' read type value <<< "$completion"
+
+        if [[ $type == 'dir' ]]; then
+            COMPREPLY=()
+            compopt -o dirnames
+        elif [[ $type == 'file' ]]; then
+            COMPREPLY=()
+            compopt -o default
+        elif [[ $type == 'plain' ]]; then
+            COMPREPLY+=($value)
+        fi
+    done
+
+    return 0
+}
+
+%(complete_func)s_setup() {
+    complete -o nosort -F %(complete_func)s %(prog_name)s
+}
+
+%(complete_func)s_setup;
+"""
+
+_SOURCE_ZSH = """\
+#compdef %(prog_name)s
+
+%(complete_func)s() {
+    local -a completions
+    local -a completions_with_descriptions
+    local -a response
+    (( ! $+commands[%(prog_name)s] )) && return 1
+
+    response=("${(@f)$(env COMP_WORDS="${words[*]}" COMP_CWORD=$((CURRENT-1)) \
+%(complete_var)s=zsh_complete %(prog_name)s)}")
+
+    for type key descr in ${response}; do
+        if [[ "$type" == "plain" ]]; then
+            if [[ "$descr" == "_" ]]; then
+                completions+=("$key")
+            else
+                completions_with_descriptions+=("$key":"$descr")
+            fi
+        elif [[ "$type" == "dir" ]]; then
+            _path_files -/
+        elif [[ "$type" == "file" ]]; then
+            _path_files -f
+        fi
+    done
+
+    if [ -n "$completions_with_descriptions" ]; then
+        _describe -V unsorted completions_with_descriptions -U
+    fi
+
+    if [ -n "$completions" ]; then
+        compadd -U -V unsorted -a completions
+    fi
+}
+
+compdef %(complete_func)s %(prog_name)s;
+"""
+
+_SOURCE_FISH = """\
+function %(complete_func)s;
+    set -l response;
+
+    for value in (env %(complete_var)s=fish_complete COMP_WORDS=(commandline -cp) \
+COMP_CWORD=(commandline -t) %(prog_name)s);
+        set response $response $value;
+    end;
+
+    for completion in $response;
+        set -l metadata (string split "," $completion);
+
+        if test $metadata[1] = "dir";
+            __fish_complete_directories $metadata[2];
+        else if test $metadata[1] = "file";
+            __fish_complete_path $metadata[2];
+        else if test $metadata[1] = "plain";
+            echo $metadata[2];
+        end;
+    end;
+end;
+
+complete --no-files --command %(prog_name)s --arguments \
+"(%(complete_func)s)";
+"""
+
+
+class ShellComplete:
+    """Base class for providing shell completion support. A subclass for
+    a given shell will override attributes and methods to implement the
+    completion instructions (``source`` and ``complete``).
+
+    :param cli: Command being called.
+    :param prog_name: Name of the executable in the shell.
+    :param complete_var: Name of the environment variable that holds
+        the completion instruction.
+
+    .. versionadded:: 8.0
+    """
+
+    name: t.ClassVar[str]
+    """Name to register the shell as with :func:`add_completion_class`.
+    This is used in completion instructions (``{name}_source`` and
+    ``{name}_complete``).
+    """
+
+    source_template: t.ClassVar[str]
+    """Completion script template formatted by :meth:`source`. This must
+    be provided by subclasses.
+    """
+
+    def __init__(
+        self,
+        cli: BaseCommand,
+        ctx_args: t.Dict[str, t.Any],
+        prog_name: str,
+        complete_var: str,
+    ) -> None:
+        self.cli = cli
+        self.ctx_args = ctx_args
+        self.prog_name = prog_name
+        self.complete_var = complete_var
+
+    @property
+    def func_name(self) -> str:
+        """The name of the shell function defined by the completion
+        script.
+        """
+        safe_name = re.sub(r"\W*", "", self.prog_name.replace("-", "_"), re.ASCII)
+        return f"_{safe_name}_completion"
+
+    def source_vars(self) -> t.Dict[str, t.Any]:
+        """Vars for formatting :attr:`source_template`.
+
+        By default this provides ``complete_func``, ``complete_var``,
+        and ``prog_name``.
+        """
+        return {
+            "complete_func": self.func_name,
+            "complete_var": self.complete_var,
+            "prog_name": self.prog_name,
+        }
+
+    def source(self) -> str:
+        """Produce the shell script that defines the completion
+        function. By default this ``%``-style formats
+        :attr:`source_template` with the dict returned by
+        :meth:`source_vars`.
+        """
+        return self.source_template % self.source_vars()
+
+    def get_completion_args(self) -> t.Tuple[t.List[str], str]:
+        """Use the env vars defined by the shell script to return a
+        tuple of ``args, incomplete``. This must be implemented by
+        subclasses.
+        """
+        raise NotImplementedError
+
+    def get_completions(
+        self, args: t.List[str], incomplete: str
+    ) -> t.List[CompletionItem]:
+        """Determine the context and last complete command or parameter
+        from the complete args. Call that object's ``shell_complete``
+        method to get the completions for the incomplete value.
+
+        :param args: List of complete args before the incomplete value.
+        :param incomplete: Value being completed. May be empty.
+        """
+        ctx = _resolve_context(self.cli, self.ctx_args, self.prog_name, args)
+        obj, incomplete = _resolve_incomplete(ctx, args, incomplete)
+        return obj.shell_complete(ctx, incomplete)
+
+    def format_completion(self, item: CompletionItem) -> str:
+        """Format a completion item into the form recognized by the
+        shell script. This must be implemented by subclasses.
+
+        :param item: Completion item to format.
+        """
+        raise NotImplementedError
+
+    def complete(self) -> str:
+        """Produce the completion data to send back to the shell.
+
+        By default this calls :meth:`get_completion_args`, gets the
+        completions, then calls :meth:`format_completion` for each
+        completion.
+        """
+        args, incomplete = self.get_completion_args()
+        completions = self.get_completions(args, incomplete)
+        out = [self.format_completion(item) for item in completions]
+        return "\n".join(out)
+
+
+class BashComplete(ShellComplete):
+    """Shell completion for Bash."""
+
+    name = "bash"
+    source_template = _SOURCE_BASH
+
+    def _check_version(self) -> None:
+        import subprocess
+
+        output = subprocess.run(
+            ["bash", "-c", "echo ${BASH_VERSION}"], stdout=subprocess.PIPE
+        )
+        match = re.search(r"^(\d+)\.(\d+)\.\d+", output.stdout.decode())
+
+        if match is not None:
+            major, minor = match.groups()
+
+            if major < "4" or major == "4" and minor < "4":
+                raise RuntimeError(
+                    _(
+                        "Shell completion is not supported for Bash"
+                        " versions older than 4.4."
+                    )
+                )
+        else:
+            raise RuntimeError(
+                _("Couldn't detect Bash version, shell completion is not supported.")
+            )
+
+    def source(self) -> str:
+        self._check_version()
+        return super().source()
+
+    def get_completion_args(self) -> t.Tuple[t.List[str], str]:
+        cwords = split_arg_string(os.environ["COMP_WORDS"])
+        cword = int(os.environ["COMP_CWORD"])
+        args = cwords[1:cword]
+
+        try:
+            incomplete = cwords[cword]
+        except IndexError:
+            incomplete = ""
+
+        return args, incomplete
+
+    def format_completion(self, item: CompletionItem) -> str:
+        return f"{item.type},{item.value}"
+
+
+class ZshComplete(ShellComplete):
+    """Shell completion for Zsh."""
+
+    name = "zsh"
+    source_template = _SOURCE_ZSH
+
+    def get_completion_args(self) -> t.Tuple[t.List[str], str]:
+        cwords = split_arg_string(os.environ["COMP_WORDS"])
+        cword = int(os.environ["COMP_CWORD"])
+        args = cwords[1:cword]
+
+        try:
+            incomplete = cwords[cword]
+        except IndexError:
+            incomplete = ""
+
+        return args, incomplete
+
+    def format_completion(self, item: CompletionItem) -> str:
+        return f"{item.type}\n{item.value}\n{item.help if item.help else '_'}"
+
+
+class FishComplete(ShellComplete):
+    """Shell completion for Fish."""
+
+    name = "fish"
+    source_template = _SOURCE_FISH
+
+    def get_completion_args(self) -> t.Tuple[t.List[str], str]:
+        cwords = split_arg_string(os.environ["COMP_WORDS"])
+        incomplete = os.environ["COMP_CWORD"]
+        args = cwords[1:]
+
+        # Fish stores the partial word in both COMP_WORDS and
+        # COMP_CWORD, remove it from complete args.
+        if incomplete and args and args[-1] == incomplete:
+            args.pop()
+
+        return args, incomplete
+
+    def format_completion(self, item: CompletionItem) -> str:
+        if item.help:
+            return f"{item.type},{item.value}\t{item.help}"
+
+        return f"{item.type},{item.value}"
+
+
+_available_shells: t.Dict[str, t.Type[ShellComplete]] = {
+    "bash": BashComplete,
+    "fish": FishComplete,
+    "zsh": ZshComplete,
+}
+
+
+def add_completion_class(
+    cls: t.Type[ShellComplete], name: t.Optional[str] = None
+) -> None:
+    """Register a :class:`ShellComplete` subclass under the given name.
+    The name will be provided by the completion instruction environment
+    variable during completion.
+
+    :param cls: The completion class that will handle completion for the
+        shell.
+    :param name: Name to register the class under. Defaults to the
+        class's ``name`` attribute.
+    """
+    if name is None:
+        name = cls.name
+
+    _available_shells[name] = cls
+
+
+def get_completion_class(shell: str) -> t.Optional[t.Type[ShellComplete]]:
+    """Look up a registered :class:`ShellComplete` subclass by the name
+    provided by the completion instruction environment variable. If the
+    name isn't registered, returns ``None``.
+
+    :param shell: Name the class is registered under.
+    """
+    return _available_shells.get(shell)
+
+
+def _is_incomplete_argument(ctx: Context, param: Parameter) -> bool:
+    """Determine if the given parameter is an argument that can still
+    accept values.
+
+    :param ctx: Invocation context for the command represented by the
+        parsed complete args.
+    :param param: Argument object being checked.
+    """
+    if not isinstance(param, Argument):
+        return False
+
+    assert param.name is not None
+    value = ctx.params[param.name]
+    return (
+        param.nargs == -1
+        or ctx.get_parameter_source(param.name) is not ParameterSource.COMMANDLINE
+        or (
+            param.nargs > 1
+            and isinstance(value, (tuple, list))
+            and len(value) < param.nargs
+        )
+    )
+
+
+def _start_of_option(ctx: Context, value: str) -> bool:
+    """Check if the value looks like the start of an option."""
+    if not value:
+        return False
+
+    c = value[0]
+    return c in ctx._opt_prefixes
+
+
+def _is_incomplete_option(ctx: Context, args: t.List[str], param: Parameter) -> bool:
+    """Determine if the given parameter is an option that needs a value.
+
+    :param args: List of complete args before the incomplete value.
+    :param param: Option object being checked.
+    """
+    if not isinstance(param, Option):
+        return False
+
+    if param.is_flag or param.count:
+        return False
+
+    last_option = None
+
+    for index, arg in enumerate(reversed(args)):
+        if index + 1 > param.nargs:
+            break
+
+        if _start_of_option(ctx, arg):
+            last_option = arg
+
+    return last_option is not None and last_option in param.opts
+
+
+def _resolve_context(
+    cli: BaseCommand, ctx_args: t.Dict[str, t.Any], prog_name: str, args: t.List[str]
+) -> Context:
+    """Produce the context hierarchy starting with the command and
+    traversing the complete arguments. This only follows the commands,
+    it doesn't trigger input prompts or callbacks.
+
+    :param cli: Command being called.
+    :param prog_name: Name of the executable in the shell.
+    :param args: List of complete args before the incomplete value.
+    """
+    ctx_args["resilient_parsing"] = True
+    ctx = cli.make_context(prog_name, args.copy(), **ctx_args)
+    args = ctx.protected_args + ctx.args
+
+    while args:
+        command = ctx.command
+
+        if isinstance(command, MultiCommand):
+            if not command.chain:
+                name, cmd, args = command.resolve_command(ctx, args)
+
+                if cmd is None:
+                    return ctx
+
+                ctx = cmd.make_context(name, args, parent=ctx, resilient_parsing=True)
+                args = ctx.protected_args + ctx.args
+            else:
+                while args:
+                    name, cmd, args = command.resolve_command(ctx, args)
+
+                    if cmd is None:
+                        return ctx
+
+                    sub_ctx = cmd.make_context(
+                        name,
+                        args,
+                        parent=ctx,
+                        allow_extra_args=True,
+                        allow_interspersed_args=False,
+                        resilient_parsing=True,
+                    )
+                    args = sub_ctx.args
+
+                ctx = sub_ctx
+                args = [*sub_ctx.protected_args, *sub_ctx.args]
+        else:
+            break
+
+    return ctx
+
+
+def _resolve_incomplete(
+    ctx: Context, args: t.List[str], incomplete: str
+) -> t.Tuple[t.Union[BaseCommand, Parameter], str]:
+    """Find the Click object that will handle the completion of the
+    incomplete value. Return the object and the incomplete value.
+
+    :param ctx: Invocation context for the command represented by
+        the parsed complete args.
+    :param args: List of complete args before the incomplete value.
+    :param incomplete: Value being completed. May be empty.
+    """
+    # Different shells treat an "=" between a long option name and
+    # value differently. Might keep the value joined, return the "="
+    # as a separate item, or return the split name and value. Always
+    # split and discard the "=" to make completion easier.
+    if incomplete == "=":
+        incomplete = ""
+    elif "=" in incomplete and _start_of_option(ctx, incomplete):
+        name, _, incomplete = incomplete.partition("=")
+        args.append(name)
+
+    # The "--" marker tells Click to stop treating values as options
+    # even if they start with the option character. If it hasn't been
+    # given and the incomplete arg looks like an option, the current
+    # command will provide option name completions.
+    if "--" not in args and _start_of_option(ctx, incomplete):
+        return ctx.command, incomplete
+
+    params = ctx.command.get_params(ctx)
+
+    # If the last complete arg is an option name with an incomplete
+    # value, the option will provide value completions.
+    for param in params:
+        if _is_incomplete_option(ctx, args, param):
+            return param, incomplete
+
+    # It's not an option name or value. The first argument without a
+    # parsed value will provide value completions.
+    for param in params:
+        if _is_incomplete_argument(ctx, param):
+            return param, incomplete
+
+    # There were no unparsed arguments, the command may be a group that
+    # will provide command name completions.
+    return ctx.command, incomplete
diff --git a/venv/lib/python3.9/site-packages/click/termui.py b/venv/lib/python3.9/site-packages/click/termui.py
new file mode 100644
index 0000000..bfb2f5a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/termui.py
@@ -0,0 +1,787 @@
+import inspect
+import io
+import itertools
+import os
+import sys
+import typing as t
+from gettext import gettext as _
+
+from ._compat import isatty
+from ._compat import strip_ansi
+from ._compat import WIN
+from .exceptions import Abort
+from .exceptions import UsageError
+from .globals import resolve_color_default
+from .types import Choice
+from .types import convert_type
+from .types import ParamType
+from .utils import echo
+from .utils import LazyFile
+
+if t.TYPE_CHECKING:
+    from ._termui_impl import ProgressBar
+
+V = t.TypeVar("V")
+
+# The prompt functions to use.  The doc tools currently override these
+# functions to customize how they work.
+visible_prompt_func: t.Callable[[str], str] = input
+
+_ansi_colors = {
+    "black": 30,
+    "red": 31,
+    "green": 32,
+    "yellow": 33,
+    "blue": 34,
+    "magenta": 35,
+    "cyan": 36,
+    "white": 37,
+    "reset": 39,
+    "bright_black": 90,
+    "bright_red": 91,
+    "bright_green": 92,
+    "bright_yellow": 93,
+    "bright_blue": 94,
+    "bright_magenta": 95,
+    "bright_cyan": 96,
+    "bright_white": 97,
+}
+_ansi_reset_all = "\033[0m"
+
+
+def hidden_prompt_func(prompt: str) -> str:
+    import getpass
+
+    return getpass.getpass(prompt)
+
+
+def _build_prompt(
+    text: str,
+    suffix: str,
+    show_default: bool = False,
+    default: t.Optional[t.Any] = None,
+    show_choices: bool = True,
+    type: t.Optional[ParamType] = None,
+) -> str:
+    prompt = text
+    if type is not None and show_choices and isinstance(type, Choice):
+        prompt += f" ({', '.join(map(str, type.choices))})"
+    if default is not None and show_default:
+        prompt = f"{prompt} [{_format_default(default)}]"
+    return f"{prompt}{suffix}"
+
+
+def _format_default(default: t.Any) -> t.Any:
+    if isinstance(default, (io.IOBase, LazyFile)) and hasattr(default, "name"):
+        return default.name  # type: ignore
+
+    return default
+
+
+def prompt(
+    text: str,
+    default: t.Optional[t.Any] = None,
+    hide_input: bool = False,
+    confirmation_prompt: t.Union[bool, str] = False,
+    type: t.Optional[t.Union[ParamType, t.Any]] = None,
+    value_proc: t.Optional[t.Callable[[str], t.Any]] = None,
+    prompt_suffix: str = ": ",
+    show_default: bool = True,
+    err: bool = False,
+    show_choices: bool = True,
+) -> t.Any:
+    """Prompts a user for input.  This is a convenience function that can
+    be used to prompt a user for input later.
+
+    If the user aborts the input by sending an interrupt signal, this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    :param text: the text to show for the prompt.
+    :param default: the default value to use if no input happens.  If this
+                    is not given it will prompt until it's aborted.
+    :param hide_input: if this is set to true then the input value will
+                       be hidden.
+    :param confirmation_prompt: Prompt a second time to confirm the
+        value. Can be set to a string instead of ``True`` to customize
+        the message.
+    :param type: the type to use to check the value against.
+    :param value_proc: if this parameter is provided it's a function that
+                       is invoked instead of the type conversion to
+                       convert a value.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    :param show_choices: Show or hide choices if the passed type is a Choice.
+                         For example if type is a Choice of either day or week,
+                         show_choices is true and text is "Group by" then the
+                         prompt will be "Group by (day, week): ".
+
+    .. versionadded:: 8.0
+        ``confirmation_prompt`` can be a custom string.
+
+    .. versionadded:: 7.0
+        Added the ``show_choices`` parameter.
+
+    .. versionadded:: 6.0
+        Added unicode support for cmd.exe on Windows.
+
+    .. versionadded:: 4.0
+        Added the `err` parameter.
+
+    """
+
+    def prompt_func(text: str) -> str:
+        f = hidden_prompt_func if hide_input else visible_prompt_func
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(text.rstrip(" "), nl=False, err=err)
+            # Echo a space to stdout to work around an issue where
+            # readline causes backspace to clear the whole line.
+            return f(" ")
+        except (KeyboardInterrupt, EOFError):
+            # getpass doesn't print a newline if the user aborts input with ^C.
+            # Allegedly this behavior is inherited from getpass(3).
+            # A doc bug has been filed at https://bugs.python.org/issue24711
+            if hide_input:
+                echo(None, err=err)
+            raise Abort() from None
+
+    if value_proc is None:
+        value_proc = convert_type(type, default)
+
+    prompt = _build_prompt(
+        text, prompt_suffix, show_default, default, show_choices, type
+    )
+
+    if confirmation_prompt:
+        if confirmation_prompt is True:
+            confirmation_prompt = _("Repeat for confirmation")
+
+        confirmation_prompt = _build_prompt(confirmation_prompt, prompt_suffix)
+
+    while True:
+        while True:
+            value = prompt_func(prompt)
+            if value:
+                break
+            elif default is not None:
+                value = default
+                break
+        try:
+            result = value_proc(value)
+        except UsageError as e:
+            if hide_input:
+                echo(_("Error: The value you entered was invalid."), err=err)
+            else:
+                echo(_("Error: {e.message}").format(e=e), err=err)  # noqa: B306
+            continue
+        if not confirmation_prompt:
+            return result
+        while True:
+            value2 = prompt_func(confirmation_prompt)
+            is_empty = not value and not value2
+            if value2 or is_empty:
+                break
+        if value == value2:
+            return result
+        echo(_("Error: The two entered values do not match."), err=err)
+
+
+def confirm(
+    text: str,
+    default: t.Optional[bool] = False,
+    abort: bool = False,
+    prompt_suffix: str = ": ",
+    show_default: bool = True,
+    err: bool = False,
+) -> bool:
+    """Prompts for confirmation (yes/no question).
+
+    If the user aborts the input by sending a interrupt signal this
+    function will catch it and raise a :exc:`Abort` exception.
+
+    :param text: the question to ask.
+    :param default: The default value to use when no input is given. If
+        ``None``, repeat until input is given.
+    :param abort: if this is set to `True` a negative answer aborts the
+                  exception by raising :exc:`Abort`.
+    :param prompt_suffix: a suffix that should be added to the prompt.
+    :param show_default: shows or hides the default value in the prompt.
+    :param err: if set to true the file defaults to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+
+    .. versionchanged:: 8.0
+        Repeat until input is given if ``default`` is ``None``.
+
+    .. versionadded:: 4.0
+        Added the ``err`` parameter.
+    """
+    prompt = _build_prompt(
+        text,
+        prompt_suffix,
+        show_default,
+        "y/n" if default is None else ("Y/n" if default else "y/N"),
+    )
+
+    while True:
+        try:
+            # Write the prompt separately so that we get nice
+            # coloring through colorama on Windows
+            echo(prompt.rstrip(" "), nl=False, err=err)
+            # Echo a space to stdout to work around an issue where
+            # readline causes backspace to clear the whole line.
+            value = visible_prompt_func(" ").lower().strip()
+        except (KeyboardInterrupt, EOFError):
+            raise Abort() from None
+        if value in ("y", "yes"):
+            rv = True
+        elif value in ("n", "no"):
+            rv = False
+        elif default is not None and value == "":
+            rv = default
+        else:
+            echo(_("Error: invalid input"), err=err)
+            continue
+        break
+    if abort and not rv:
+        raise Abort()
+    return rv
+
+
+def echo_via_pager(
+    text_or_generator: t.Union[t.Iterable[str], t.Callable[[], t.Iterable[str]], str],
+    color: t.Optional[bool] = None,
+) -> None:
+    """This function takes a text and shows it via an environment specific
+    pager on stdout.
+
+    .. versionchanged:: 3.0
+       Added the `color` flag.
+
+    :param text_or_generator: the text to page, or alternatively, a
+                              generator emitting the text to page.
+    :param color: controls if the pager supports ANSI colors or not.  The
+                  default is autodetection.
+    """
+    color = resolve_color_default(color)
+
+    if inspect.isgeneratorfunction(text_or_generator):
+        i = t.cast(t.Callable[[], t.Iterable[str]], text_or_generator)()
+    elif isinstance(text_or_generator, str):
+        i = [text_or_generator]
+    else:
+        i = iter(t.cast(t.Iterable[str], text_or_generator))
+
+    # convert every element of i to a text type if necessary
+    text_generator = (el if isinstance(el, str) else str(el) for el in i)
+
+    from ._termui_impl import pager
+
+    return pager(itertools.chain(text_generator, "\n"), color)
+
+
+def progressbar(
+    iterable: t.Optional[t.Iterable[V]] = None,
+    length: t.Optional[int] = None,
+    label: t.Optional[str] = None,
+    show_eta: bool = True,
+    show_percent: t.Optional[bool] = None,
+    show_pos: bool = False,
+    item_show_func: t.Optional[t.Callable[[t.Optional[V]], t.Optional[str]]] = None,
+    fill_char: str = "#",
+    empty_char: str = "-",
+    bar_template: str = "%(label)s  [%(bar)s]  %(info)s",
+    info_sep: str = "  ",
+    width: int = 36,
+    file: t.Optional[t.TextIO] = None,
+    color: t.Optional[bool] = None,
+    update_min_steps: int = 1,
+) -> "ProgressBar[V]":
+    """This function creates an iterable context manager that can be used
+    to iterate over something while showing a progress bar.  It will
+    either iterate over the `iterable` or `length` items (that are counted
+    up).  While iteration happens, this function will print a rendered
+    progress bar to the given `file` (defaults to stdout) and will attempt
+    to calculate remaining time and more.  By default, this progress bar
+    will not be rendered if the file is not a terminal.
+
+    The context manager creates the progress bar.  When the context
+    manager is entered the progress bar is already created.  With every
+    iteration over the progress bar, the iterable passed to the bar is
+    advanced and the bar is updated.  When the context manager exits,
+    a newline is printed and the progress bar is finalized on screen.
+
+    Note: The progress bar is currently designed for use cases where the
+    total progress can be expected to take at least several seconds.
+    Because of this, the ProgressBar class object won't display
+    progress that is considered too fast, and progress where the time
+    between steps is less than a second.
+
+    No printing must happen or the progress bar will be unintentionally
+    destroyed.
+
+    Example usage::
+
+        with progressbar(items) as bar:
+            for item in bar:
+                do_something_with(item)
+
+    Alternatively, if no iterable is specified, one can manually update the
+    progress bar through the `update()` method instead of directly
+    iterating over the progress bar.  The update method accepts the number
+    of steps to increment the bar with::
+
+        with progressbar(length=chunks.total_bytes) as bar:
+            for chunk in chunks:
+                process_chunk(chunk)
+                bar.update(chunks.bytes)
+
+    The ``update()`` method also takes an optional value specifying the
+    ``current_item`` at the new position. This is useful when used
+    together with ``item_show_func`` to customize the output for each
+    manual step::
+
+        with click.progressbar(
+            length=total_size,
+            label='Unzipping archive',
+            item_show_func=lambda a: a.filename
+        ) as bar:
+            for archive in zip_file:
+                archive.extract()
+                bar.update(archive.size, archive)
+
+    :param iterable: an iterable to iterate over.  If not provided the length
+                     is required.
+    :param length: the number of items to iterate over.  By default the
+                   progressbar will attempt to ask the iterator about its
+                   length, which might or might not work.  If an iterable is
+                   also provided this parameter can be used to override the
+                   length.  If an iterable is not provided the progress bar
+                   will iterate over a range of that length.
+    :param label: the label to show next to the progress bar.
+    :param show_eta: enables or disables the estimated time display.  This is
+                     automatically disabled if the length cannot be
+                     determined.
+    :param show_percent: enables or disables the percentage display.  The
+                         default is `True` if the iterable has a length or
+                         `False` if not.
+    :param show_pos: enables or disables the absolute position display.  The
+                     default is `False`.
+    :param item_show_func: A function called with the current item which
+        can return a string to show next to the progress bar. If the
+        function returns ``None`` nothing is shown. The current item can
+        be ``None``, such as when entering and exiting the bar.
+    :param fill_char: the character to use to show the filled part of the
+                      progress bar.
+    :param empty_char: the character to use to show the non-filled part of
+                       the progress bar.
+    :param bar_template: the format string to use as template for the bar.
+                         The parameters in it are ``label`` for the label,
+                         ``bar`` for the progress bar and ``info`` for the
+                         info section.
+    :param info_sep: the separator between multiple info items (eta etc.)
+    :param width: the width of the progress bar in characters, 0 means full
+                  terminal width
+    :param file: The file to write to. If this is not a terminal then
+        only the label is printed.
+    :param color: controls if the terminal supports ANSI colors or not.  The
+                  default is autodetection.  This is only needed if ANSI
+                  codes are included anywhere in the progress bar output
+                  which is not the case by default.
+    :param update_min_steps: Render only when this many updates have
+        completed. This allows tuning for very fast iterators.
+
+    .. versionchanged:: 8.0
+        Output is shown even if execution time is less than 0.5 seconds.
+
+    .. versionchanged:: 8.0
+        ``item_show_func`` shows the current item, not the previous one.
+
+    .. versionchanged:: 8.0
+        Labels are echoed if the output is not a TTY. Reverts a change
+        in 7.0 that removed all output.
+
+    .. versionadded:: 8.0
+       Added the ``update_min_steps`` parameter.
+
+    .. versionchanged:: 4.0
+        Added the ``color`` parameter. Added the ``update`` method to
+        the object.
+
+    .. versionadded:: 2.0
+    """
+    from ._termui_impl import ProgressBar
+
+    color = resolve_color_default(color)
+    return ProgressBar(
+        iterable=iterable,
+        length=length,
+        show_eta=show_eta,
+        show_percent=show_percent,
+        show_pos=show_pos,
+        item_show_func=item_show_func,
+        fill_char=fill_char,
+        empty_char=empty_char,
+        bar_template=bar_template,
+        info_sep=info_sep,
+        file=file,
+        label=label,
+        width=width,
+        color=color,
+        update_min_steps=update_min_steps,
+    )
+
+
+def clear() -> None:
+    """Clears the terminal screen.  This will have the effect of clearing
+    the whole visible space of the terminal and moving the cursor to the
+    top left.  This does not do anything if not connected to a terminal.
+
+    .. versionadded:: 2.0
+    """
+    if not isatty(sys.stdout):
+        return
+    if WIN:
+        os.system("cls")
+    else:
+        sys.stdout.write("\033[2J\033[1;1H")
+
+
+def _interpret_color(
+    color: t.Union[int, t.Tuple[int, int, int], str], offset: int = 0
+) -> str:
+    if isinstance(color, int):
+        return f"{38 + offset};5;{color:d}"
+
+    if isinstance(color, (tuple, list)):
+        r, g, b = color
+        return f"{38 + offset};2;{r:d};{g:d};{b:d}"
+
+    return str(_ansi_colors[color] + offset)
+
+
+def style(
+    text: t.Any,
+    fg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None,
+    bg: t.Optional[t.Union[int, t.Tuple[int, int, int], str]] = None,
+    bold: t.Optional[bool] = None,
+    dim: t.Optional[bool] = None,
+    underline: t.Optional[bool] = None,
+    overline: t.Optional[bool] = None,
+    italic: t.Optional[bool] = None,
+    blink: t.Optional[bool] = None,
+    reverse: t.Optional[bool] = None,
+    strikethrough: t.Optional[bool] = None,
+    reset: bool = True,
+) -> str:
+    """Styles a text with ANSI styles and returns the new string.  By
+    default the styling is self contained which means that at the end
+    of the string a reset code is issued.  This can be prevented by
+    passing ``reset=False``.
+
+    Examples::
+
+        click.echo(click.style('Hello World!', fg='green'))
+        click.echo(click.style('ATTENTION!', blink=True))
+        click.echo(click.style('Some things', reverse=True, fg='cyan'))
+        click.echo(click.style('More colors', fg=(255, 12, 128), bg=117))
+
+    Supported color names:
+
+    * ``black`` (might be a gray)
+    * ``red``
+    * ``green``
+    * ``yellow`` (might be an orange)
+    * ``blue``
+    * ``magenta``
+    * ``cyan``
+    * ``white`` (might be light gray)
+    * ``bright_black``
+    * ``bright_red``
+    * ``bright_green``
+    * ``bright_yellow``
+    * ``bright_blue``
+    * ``bright_magenta``
+    * ``bright_cyan``
+    * ``bright_white``
+    * ``reset`` (reset the color code only)
+
+    If the terminal supports it, color may also be specified as:
+
+    -   An integer in the interval [0, 255]. The terminal must support
+        8-bit/256-color mode.
+    -   An RGB tuple of three integers in [0, 255]. The terminal must
+        support 24-bit/true-color mode.
+
+    See https://en.wikipedia.org/wiki/ANSI_color and
+    https://gist.github.com/XVilka/8346728 for more information.
+
+    :param text: the string to style with ansi codes.
+    :param fg: if provided this will become the foreground color.
+    :param bg: if provided this will become the background color.
+    :param bold: if provided this will enable or disable bold mode.
+    :param dim: if provided this will enable or disable dim mode.  This is
+                badly supported.
+    :param underline: if provided this will enable or disable underline.
+    :param overline: if provided this will enable or disable overline.
+    :param italic: if provided this will enable or disable italic.
+    :param blink: if provided this will enable or disable blinking.
+    :param reverse: if provided this will enable or disable inverse
+                    rendering (foreground becomes background and the
+                    other way round).
+    :param strikethrough: if provided this will enable or disable
+        striking through text.
+    :param reset: by default a reset-all code is added at the end of the
+                  string which means that styles do not carry over.  This
+                  can be disabled to compose styles.
+
+    .. versionchanged:: 8.0
+        A non-string ``message`` is converted to a string.
+
+    .. versionchanged:: 8.0
+       Added support for 256 and RGB color codes.
+
+    .. versionchanged:: 8.0
+        Added the ``strikethrough``, ``italic``, and ``overline``
+        parameters.
+
+    .. versionchanged:: 7.0
+        Added support for bright colors.
+
+    .. versionadded:: 2.0
+    """
+    if not isinstance(text, str):
+        text = str(text)
+
+    bits = []
+
+    if fg:
+        try:
+            bits.append(f"\033[{_interpret_color(fg)}m")
+        except KeyError:
+            raise TypeError(f"Unknown color {fg!r}") from None
+
+    if bg:
+        try:
+            bits.append(f"\033[{_interpret_color(bg, 10)}m")
+        except KeyError:
+            raise TypeError(f"Unknown color {bg!r}") from None
+
+    if bold is not None:
+        bits.append(f"\033[{1 if bold else 22}m")
+    if dim is not None:
+        bits.append(f"\033[{2 if dim else 22}m")
+    if underline is not None:
+        bits.append(f"\033[{4 if underline else 24}m")
+    if overline is not None:
+        bits.append(f"\033[{53 if overline else 55}m")
+    if italic is not None:
+        bits.append(f"\033[{3 if italic else 23}m")
+    if blink is not None:
+        bits.append(f"\033[{5 if blink else 25}m")
+    if reverse is not None:
+        bits.append(f"\033[{7 if reverse else 27}m")
+    if strikethrough is not None:
+        bits.append(f"\033[{9 if strikethrough else 29}m")
+    bits.append(text)
+    if reset:
+        bits.append(_ansi_reset_all)
+    return "".join(bits)
+
+
+def unstyle(text: str) -> str:
+    """Removes ANSI styling information from a string.  Usually it's not
+    necessary to use this function as Click's echo function will
+    automatically remove styling if necessary.
+
+    .. versionadded:: 2.0
+
+    :param text: the text to remove style information from.
+    """
+    return strip_ansi(text)
+
+
+def secho(
+    message: t.Optional[t.Any] = None,
+    file: t.Optional[t.IO[t.AnyStr]] = None,
+    nl: bool = True,
+    err: bool = False,
+    color: t.Optional[bool] = None,
+    **styles: t.Any,
+) -> None:
+    """This function combines :func:`echo` and :func:`style` into one
+    call.  As such the following two calls are the same::
+
+        click.secho('Hello World!', fg='green')
+        click.echo(click.style('Hello World!', fg='green'))
+
+    All keyword arguments are forwarded to the underlying functions
+    depending on which one they go with.
+
+    Non-string types will be converted to :class:`str`. However,
+    :class:`bytes` are passed directly to :meth:`echo` without applying
+    style. If you want to style bytes that represent text, call
+    :meth:`bytes.decode` first.
+
+    .. versionchanged:: 8.0
+        A non-string ``message`` is converted to a string. Bytes are
+        passed through without style applied.
+
+    .. versionadded:: 2.0
+    """
+    if message is not None and not isinstance(message, (bytes, bytearray)):
+        message = style(message, **styles)
+
+    return echo(message, file=file, nl=nl, err=err, color=color)
+
+
+def edit(
+    text: t.Optional[t.AnyStr] = None,
+    editor: t.Optional[str] = None,
+    env: t.Optional[t.Mapping[str, str]] = None,
+    require_save: bool = True,
+    extension: str = ".txt",
+    filename: t.Optional[str] = None,
+) -> t.Optional[t.AnyStr]:
+    r"""Edits the given text in the defined editor.  If an editor is given
+    (should be the full path to the executable but the regular operating
+    system search path is used for finding the executable) it overrides
+    the detected editor.  Optionally, some environment variables can be
+    used.  If the editor is closed without changes, `None` is returned.  In
+    case a file is edited directly the return value is always `None` and
+    `require_save` and `extension` are ignored.
+
+    If the editor cannot be opened a :exc:`UsageError` is raised.
+
+    Note for Windows: to simplify cross-platform usage, the newlines are
+    automatically converted from POSIX to Windows and vice versa.  As such,
+    the message here will have ``\n`` as newline markers.
+
+    :param text: the text to edit.
+    :param editor: optionally the editor to use.  Defaults to automatic
+                   detection.
+    :param env: environment variables to forward to the editor.
+    :param require_save: if this is true, then not saving in the editor
+                         will make the return value become `None`.
+    :param extension: the extension to tell the editor about.  This defaults
+                      to `.txt` but changing this might change syntax
+                      highlighting.
+    :param filename: if provided it will edit this file instead of the
+                     provided text contents.  It will not use a temporary
+                     file as an indirection in that case.
+    """
+    from ._termui_impl import Editor
+
+    ed = Editor(editor=editor, env=env, require_save=require_save, extension=extension)
+
+    if filename is None:
+        return ed.edit(text)
+
+    ed.edit_file(filename)
+    return None
+
+
+def launch(url: str, wait: bool = False, locate: bool = False) -> int:
+    """This function launches the given URL (or filename) in the default
+    viewer application for this file type.  If this is an executable, it
+    might launch the executable in a new session.  The return value is
+    the exit code of the launched application.  Usually, ``0`` indicates
+    success.
+
+    Examples::
+
+        click.launch('https://click.palletsprojects.com/')
+        click.launch('/my/downloaded/file', locate=True)
+
+    .. versionadded:: 2.0
+
+    :param url: URL or filename of the thing to launch.
+    :param wait: Wait for the program to exit before returning. This
+        only works if the launched program blocks. In particular,
+        ``xdg-open`` on Linux does not block.
+    :param locate: if this is set to `True` then instead of launching the
+                   application associated with the URL it will attempt to
+                   launch a file manager with the file located.  This
+                   might have weird effects if the URL does not point to
+                   the filesystem.
+    """
+    from ._termui_impl import open_url
+
+    return open_url(url, wait=wait, locate=locate)
+
+
+# If this is provided, getchar() calls into this instead.  This is used
+# for unittesting purposes.
+_getchar: t.Optional[t.Callable[[bool], str]] = None
+
+
+def getchar(echo: bool = False) -> str:
+    """Fetches a single character from the terminal and returns it.  This
+    will always return a unicode character and under certain rare
+    circumstances this might return more than one character.  The
+    situations which more than one character is returned is when for
+    whatever reason multiple characters end up in the terminal buffer or
+    standard input was not actually a terminal.
+
+    Note that this will always read from the terminal, even if something
+    is piped into the standard input.
+
+    Note for Windows: in rare cases when typing non-ASCII characters, this
+    function might wait for a second character and then return both at once.
+    This is because certain Unicode characters look like special-key markers.
+
+    .. versionadded:: 2.0
+
+    :param echo: if set to `True`, the character read will also show up on
+                 the terminal.  The default is to not show it.
+    """
+    global _getchar
+
+    if _getchar is None:
+        from ._termui_impl import getchar as f
+
+        _getchar = f
+
+    return _getchar(echo)
+
+
+def raw_terminal() -> t.ContextManager[int]:
+    from ._termui_impl import raw_terminal as f
+
+    return f()
+
+
+def pause(info: t.Optional[str] = None, err: bool = False) -> None:
+    """This command stops execution and waits for the user to press any
+    key to continue.  This is similar to the Windows batch "pause"
+    command.  If the program is not run through a terminal, this command
+    will instead do nothing.
+
+    .. versionadded:: 2.0
+
+    .. versionadded:: 4.0
+       Added the `err` parameter.
+
+    :param info: The message to print before pausing. Defaults to
+        ``"Press any key to continue..."``.
+    :param err: if set to message goes to ``stderr`` instead of
+                ``stdout``, the same as with echo.
+    """
+    if not isatty(sys.stdin) or not isatty(sys.stdout):
+        return
+
+    if info is None:
+        info = _("Press any key to continue...")
+
+    try:
+        if info:
+            echo(info, nl=False, err=err)
+        try:
+            getchar()
+        except (KeyboardInterrupt, EOFError):
+            pass
+    finally:
+        if info:
+            echo(err=err)
diff --git a/venv/lib/python3.9/site-packages/click/testing.py b/venv/lib/python3.9/site-packages/click/testing.py
new file mode 100644
index 0000000..e395c2e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/testing.py
@@ -0,0 +1,479 @@
+import contextlib
+import io
+import os
+import shlex
+import shutil
+import sys
+import tempfile
+import typing as t
+from types import TracebackType
+
+from . import formatting
+from . import termui
+from . import utils
+from ._compat import _find_binary_reader
+
+if t.TYPE_CHECKING:
+    from .core import BaseCommand
+
+
+class EchoingStdin:
+    def __init__(self, input: t.BinaryIO, output: t.BinaryIO) -> None:
+        self._input = input
+        self._output = output
+        self._paused = False
+
+    def __getattr__(self, x: str) -> t.Any:
+        return getattr(self._input, x)
+
+    def _echo(self, rv: bytes) -> bytes:
+        if not self._paused:
+            self._output.write(rv)
+
+        return rv
+
+    def read(self, n: int = -1) -> bytes:
+        return self._echo(self._input.read(n))
+
+    def read1(self, n: int = -1) -> bytes:
+        return self._echo(self._input.read1(n))  # type: ignore
+
+    def readline(self, n: int = -1) -> bytes:
+        return self._echo(self._input.readline(n))
+
+    def readlines(self) -> t.List[bytes]:
+        return [self._echo(x) for x in self._input.readlines()]
+
+    def __iter__(self) -> t.Iterator[bytes]:
+        return iter(self._echo(x) for x in self._input)
+
+    def __repr__(self) -> str:
+        return repr(self._input)
+
+
+@contextlib.contextmanager
+def _pause_echo(stream: t.Optional[EchoingStdin]) -> t.Iterator[None]:
+    if stream is None:
+        yield
+    else:
+        stream._paused = True
+        yield
+        stream._paused = False
+
+
+class _NamedTextIOWrapper(io.TextIOWrapper):
+    def __init__(
+        self, buffer: t.BinaryIO, name: str, mode: str, **kwargs: t.Any
+    ) -> None:
+        super().__init__(buffer, **kwargs)
+        self._name = name
+        self._mode = mode
+
+    @property
+    def name(self) -> str:
+        return self._name
+
+    @property
+    def mode(self) -> str:
+        return self._mode
+
+
+def make_input_stream(
+    input: t.Optional[t.Union[str, bytes, t.IO]], charset: str
+) -> t.BinaryIO:
+    # Is already an input stream.
+    if hasattr(input, "read"):
+        rv = _find_binary_reader(t.cast(t.IO, input))
+
+        if rv is not None:
+            return rv
+
+        raise TypeError("Could not find binary reader for input stream.")
+
+    if input is None:
+        input = b""
+    elif isinstance(input, str):
+        input = input.encode(charset)
+
+    return io.BytesIO(t.cast(bytes, input))
+
+
+class Result:
+    """Holds the captured result of an invoked CLI script."""
+
+    def __init__(
+        self,
+        runner: "CliRunner",
+        stdout_bytes: bytes,
+        stderr_bytes: t.Optional[bytes],
+        return_value: t.Any,
+        exit_code: int,
+        exception: t.Optional[BaseException],
+        exc_info: t.Optional[
+            t.Tuple[t.Type[BaseException], BaseException, TracebackType]
+        ] = None,
+    ):
+        #: The runner that created the result
+        self.runner = runner
+        #: The standard output as bytes.
+        self.stdout_bytes = stdout_bytes
+        #: The standard error as bytes, or None if not available
+        self.stderr_bytes = stderr_bytes
+        #: The value returned from the invoked command.
+        #:
+        #: .. versionadded:: 8.0
+        self.return_value = return_value
+        #: The exit code as integer.
+        self.exit_code = exit_code
+        #: The exception that happened if one did.
+        self.exception = exception
+        #: The traceback
+        self.exc_info = exc_info
+
+    @property
+    def output(self) -> str:
+        """The (standard) output as unicode string."""
+        return self.stdout
+
+    @property
+    def stdout(self) -> str:
+        """The standard output as unicode string."""
+        return self.stdout_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    @property
+    def stderr(self) -> str:
+        """The standard error as unicode string."""
+        if self.stderr_bytes is None:
+            raise ValueError("stderr not separately captured")
+        return self.stderr_bytes.decode(self.runner.charset, "replace").replace(
+            "\r\n", "\n"
+        )
+
+    def __repr__(self) -> str:
+        exc_str = repr(self.exception) if self.exception else "okay"
+        return f"<{type(self).__name__} {exc_str}>"
+
+
+class CliRunner:
+    """The CLI runner provides functionality to invoke a Click command line
+    script for unittesting purposes in a isolated environment.  This only
+    works in single-threaded systems without any concurrency as it changes the
+    global interpreter state.
+
+    :param charset: the character set for the input and output data.
+    :param env: a dictionary with environment variables for overriding.
+    :param echo_stdin: if this is set to `True`, then reading from stdin writes
+                       to stdout.  This is useful for showing examples in
+                       some circumstances.  Note that regular prompts
+                       will automatically echo the input.
+    :param mix_stderr: if this is set to `False`, then stdout and stderr are
+                       preserved as independent streams.  This is useful for
+                       Unix-philosophy apps that have predictable stdout and
+                       noisy stderr, such that each may be measured
+                       independently
+    """
+
+    def __init__(
+        self,
+        charset: str = "utf-8",
+        env: t.Optional[t.Mapping[str, t.Optional[str]]] = None,
+        echo_stdin: bool = False,
+        mix_stderr: bool = True,
+    ) -> None:
+        self.charset = charset
+        self.env = env or {}
+        self.echo_stdin = echo_stdin
+        self.mix_stderr = mix_stderr
+
+    def get_default_prog_name(self, cli: "BaseCommand") -> str:
+        """Given a command object it will return the default program name
+        for it.  The default is the `name` attribute or ``"root"`` if not
+        set.
+        """
+        return cli.name or "root"
+
+    def make_env(
+        self, overrides: t.Optional[t.Mapping[str, t.Optional[str]]] = None
+    ) -> t.Mapping[str, t.Optional[str]]:
+        """Returns the environment overrides for invoking a script."""
+        rv = dict(self.env)
+        if overrides:
+            rv.update(overrides)
+        return rv
+
+    @contextlib.contextmanager
+    def isolation(
+        self,
+        input: t.Optional[t.Union[str, bytes, t.IO]] = None,
+        env: t.Optional[t.Mapping[str, t.Optional[str]]] = None,
+        color: bool = False,
+    ) -> t.Iterator[t.Tuple[io.BytesIO, t.Optional[io.BytesIO]]]:
+        """A context manager that sets up the isolation for invoking of a
+        command line tool.  This sets up stdin with the given input data
+        and `os.environ` with the overrides from the given dictionary.
+        This also rebinds some internals in Click to be mocked (like the
+        prompt functionality).
+
+        This is automatically done in the :meth:`invoke` method.
+
+        :param input: the input stream to put into sys.stdin.
+        :param env: the environment overrides as dictionary.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+
+        .. versionchanged:: 8.0
+            ``stderr`` is opened with ``errors="backslashreplace"``
+            instead of the default ``"strict"``.
+
+        .. versionchanged:: 4.0
+            Added the ``color`` parameter.
+        """
+        bytes_input = make_input_stream(input, self.charset)
+        echo_input = None
+
+        old_stdin = sys.stdin
+        old_stdout = sys.stdout
+        old_stderr = sys.stderr
+        old_forced_width = formatting.FORCED_WIDTH
+        formatting.FORCED_WIDTH = 80
+
+        env = self.make_env(env)
+
+        bytes_output = io.BytesIO()
+
+        if self.echo_stdin:
+            bytes_input = echo_input = t.cast(
+                t.BinaryIO, EchoingStdin(bytes_input, bytes_output)
+            )
+
+        sys.stdin = text_input = _NamedTextIOWrapper(
+            bytes_input, encoding=self.charset, name="<stdin>", mode="r"
+        )
+
+        if self.echo_stdin:
+            # Force unbuffered reads, otherwise TextIOWrapper reads a
+            # large chunk which is echoed early.
+            text_input._CHUNK_SIZE = 1  # type: ignore
+
+        sys.stdout = _NamedTextIOWrapper(
+            bytes_output, encoding=self.charset, name="<stdout>", mode="w"
+        )
+
+        bytes_error = None
+        if self.mix_stderr:
+            sys.stderr = sys.stdout
+        else:
+            bytes_error = io.BytesIO()
+            sys.stderr = _NamedTextIOWrapper(
+                bytes_error,
+                encoding=self.charset,
+                name="<stderr>",
+                mode="w",
+                errors="backslashreplace",
+            )
+
+        @_pause_echo(echo_input)  # type: ignore
+        def visible_input(prompt: t.Optional[str] = None) -> str:
+            sys.stdout.write(prompt or "")
+            val = text_input.readline().rstrip("\r\n")
+            sys.stdout.write(f"{val}\n")
+            sys.stdout.flush()
+            return val
+
+        @_pause_echo(echo_input)  # type: ignore
+        def hidden_input(prompt: t.Optional[str] = None) -> str:
+            sys.stdout.write(f"{prompt or ''}\n")
+            sys.stdout.flush()
+            return text_input.readline().rstrip("\r\n")
+
+        @_pause_echo(echo_input)  # type: ignore
+        def _getchar(echo: bool) -> str:
+            char = sys.stdin.read(1)
+
+            if echo:
+                sys.stdout.write(char)
+
+            sys.stdout.flush()
+            return char
+
+        default_color = color
+
+        def should_strip_ansi(
+            stream: t.Optional[t.IO] = None, color: t.Optional[bool] = None
+        ) -> bool:
+            if color is None:
+                return not default_color
+            return not color
+
+        old_visible_prompt_func = termui.visible_prompt_func
+        old_hidden_prompt_func = termui.hidden_prompt_func
+        old__getchar_func = termui._getchar
+        old_should_strip_ansi = utils.should_strip_ansi  # type: ignore
+        termui.visible_prompt_func = visible_input
+        termui.hidden_prompt_func = hidden_input
+        termui._getchar = _getchar
+        utils.should_strip_ansi = should_strip_ansi  # type: ignore
+
+        old_env = {}
+        try:
+            for key, value in env.items():
+                old_env[key] = os.environ.get(key)
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            yield (bytes_output, bytes_error)
+        finally:
+            for key, value in old_env.items():
+                if value is None:
+                    try:
+                        del os.environ[key]
+                    except Exception:
+                        pass
+                else:
+                    os.environ[key] = value
+            sys.stdout = old_stdout
+            sys.stderr = old_stderr
+            sys.stdin = old_stdin
+            termui.visible_prompt_func = old_visible_prompt_func
+            termui.hidden_prompt_func = old_hidden_prompt_func
+            termui._getchar = old__getchar_func
+            utils.should_strip_ansi = old_should_strip_ansi  # type: ignore
+            formatting.FORCED_WIDTH = old_forced_width
+
+    def invoke(
+        self,
+        cli: "BaseCommand",
+        args: t.Optional[t.Union[str, t.Sequence[str]]] = None,
+        input: t.Optional[t.Union[str, bytes, t.IO]] = None,
+        env: t.Optional[t.Mapping[str, t.Optional[str]]] = None,
+        catch_exceptions: bool = True,
+        color: bool = False,
+        **extra: t.Any,
+    ) -> Result:
+        """Invokes a command in an isolated environment.  The arguments are
+        forwarded directly to the command line script, the `extra` keyword
+        arguments are passed to the :meth:`~clickpkg.Command.main` function of
+        the command.
+
+        This returns a :class:`Result` object.
+
+        :param cli: the command to invoke
+        :param args: the arguments to invoke. It may be given as an iterable
+                     or a string. When given as string it will be interpreted
+                     as a Unix shell command. More details at
+                     :func:`shlex.split`.
+        :param input: the input data for `sys.stdin`.
+        :param env: the environment overrides.
+        :param catch_exceptions: Whether to catch any other exceptions than
+                                 ``SystemExit``.
+        :param extra: the keyword arguments to pass to :meth:`main`.
+        :param color: whether the output should contain color codes. The
+                      application can still override this explicitly.
+
+        .. versionchanged:: 8.0
+            The result object has the ``return_value`` attribute with
+            the value returned from the invoked command.
+
+        .. versionchanged:: 4.0
+            Added the ``color`` parameter.
+
+        .. versionchanged:: 3.0
+            Added the ``catch_exceptions`` parameter.
+
+        .. versionchanged:: 3.0
+            The result object has the ``exc_info`` attribute with the
+            traceback if available.
+        """
+        exc_info = None
+        with self.isolation(input=input, env=env, color=color) as outstreams:
+            return_value = None
+            exception: t.Optional[BaseException] = None
+            exit_code = 0
+
+            if isinstance(args, str):
+                args = shlex.split(args)
+
+            try:
+                prog_name = extra.pop("prog_name")
+            except KeyError:
+                prog_name = self.get_default_prog_name(cli)
+
+            try:
+                return_value = cli.main(args=args or (), prog_name=prog_name, **extra)
+            except SystemExit as e:
+                exc_info = sys.exc_info()
+                e_code = t.cast(t.Optional[t.Union[int, t.Any]], e.code)
+
+                if e_code is None:
+                    e_code = 0
+
+                if e_code != 0:
+                    exception = e
+
+                if not isinstance(e_code, int):
+                    sys.stdout.write(str(e_code))
+                    sys.stdout.write("\n")
+                    e_code = 1
+
+                exit_code = e_code
+
+            except Exception as e:
+                if not catch_exceptions:
+                    raise
+                exception = e
+                exit_code = 1
+                exc_info = sys.exc_info()
+            finally:
+                sys.stdout.flush()
+                stdout = outstreams[0].getvalue()
+                if self.mix_stderr:
+                    stderr = None
+                else:
+                    stderr = outstreams[1].getvalue()  # type: ignore
+
+        return Result(
+            runner=self,
+            stdout_bytes=stdout,
+            stderr_bytes=stderr,
+            return_value=return_value,
+            exit_code=exit_code,
+            exception=exception,
+            exc_info=exc_info,  # type: ignore
+        )
+
+    @contextlib.contextmanager
+    def isolated_filesystem(
+        self, temp_dir: t.Optional[t.Union[str, os.PathLike]] = None
+    ) -> t.Iterator[str]:
+        """A context manager that creates a temporary directory and
+        changes the current working directory to it. This isolates tests
+        that affect the contents of the CWD to prevent them from
+        interfering with each other.
+
+        :param temp_dir: Create the temporary directory under this
+            directory. If given, the created directory is not removed
+            when exiting.
+
+        .. versionchanged:: 8.0
+            Added the ``temp_dir`` parameter.
+        """
+        cwd = os.getcwd()
+        dt = tempfile.mkdtemp(dir=temp_dir)  # type: ignore[type-var]
+        os.chdir(dt)
+
+        try:
+            yield t.cast(str, dt)
+        finally:
+            os.chdir(cwd)
+
+            if temp_dir is None:
+                try:
+                    shutil.rmtree(dt)
+                except OSError:  # noqa: B014
+                    pass
diff --git a/venv/lib/python3.9/site-packages/click/types.py b/venv/lib/python3.9/site-packages/click/types.py
new file mode 100644
index 0000000..b45ee53
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/types.py
@@ -0,0 +1,1073 @@
+import os
+import stat
+import typing as t
+from datetime import datetime
+from gettext import gettext as _
+from gettext import ngettext
+
+from ._compat import _get_argv_encoding
+from ._compat import get_filesystem_encoding
+from ._compat import open_stream
+from .exceptions import BadParameter
+from .utils import LazyFile
+from .utils import safecall
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .core import Context
+    from .core import Parameter
+    from .shell_completion import CompletionItem
+
+
+class ParamType:
+    """Represents the type of a parameter. Validates and converts values
+    from the command line or Python into the correct type.
+
+    To implement a custom type, subclass and implement at least the
+    following:
+
+    -   The :attr:`name` class attribute must be set.
+    -   Calling an instance of the type with ``None`` must return
+        ``None``. This is already implemented by default.
+    -   :meth:`convert` must convert string values to the correct type.
+    -   :meth:`convert` must accept values that are already the correct
+        type.
+    -   It must be able to convert a value if the ``ctx`` and ``param``
+        arguments are ``None``. This can occur when converting prompt
+        input.
+    """
+
+    is_composite: t.ClassVar[bool] = False
+    arity: t.ClassVar[int] = 1
+
+    #: the descriptive name of this type
+    name: str
+
+    #: if a list of this type is expected and the value is pulled from a
+    #: string environment variable, this is what splits it up.  `None`
+    #: means any whitespace.  For all parameters the general rule is that
+    #: whitespace splits them up.  The exception are paths and files which
+    #: are split by ``os.path.pathsep`` by default (":" on Unix and ";" on
+    #: Windows).
+    envvar_list_splitter: t.ClassVar[t.Optional[str]] = None
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        """Gather information that could be useful for a tool generating
+        user-facing documentation.
+
+        Use :meth:`click.Context.to_info_dict` to traverse the entire
+        CLI structure.
+
+        .. versionadded:: 8.0
+        """
+        # The class name without the "ParamType" suffix.
+        param_type = type(self).__name__.partition("ParamType")[0]
+        param_type = param_type.partition("ParameterType")[0]
+
+        # Custom subclasses might not remember to set a name.
+        if hasattr(self, "name"):
+            name = self.name
+        else:
+            name = param_type
+
+        return {"param_type": param_type, "name": name}
+
+    def __call__(
+        self,
+        value: t.Any,
+        param: t.Optional["Parameter"] = None,
+        ctx: t.Optional["Context"] = None,
+    ) -> t.Any:
+        if value is not None:
+            return self.convert(value, param, ctx)
+
+    def get_metavar(self, param: "Parameter") -> t.Optional[str]:
+        """Returns the metavar default for this param if it provides one."""
+
+    def get_missing_message(self, param: "Parameter") -> t.Optional[str]:
+        """Optionally might return extra information about a missing
+        parameter.
+
+        .. versionadded:: 2.0
+        """
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        """Convert the value to the correct type. This is not called if
+        the value is ``None`` (the missing value).
+
+        This must accept string values from the command line, as well as
+        values that are already the correct type. It may also convert
+        other compatible types.
+
+        The ``param`` and ``ctx`` arguments may be ``None`` in certain
+        situations, such as when converting prompt input.
+
+        If the value cannot be converted, call :meth:`fail` with a
+        descriptive message.
+
+        :param value: The value to convert.
+        :param param: The parameter that is using this type to convert
+            its value. May be ``None``.
+        :param ctx: The current context that arrived at this value. May
+            be ``None``.
+        """
+        return value
+
+    def split_envvar_value(self, rv: str) -> t.Sequence[str]:
+        """Given a value from an environment variable this splits it up
+        into small chunks depending on the defined envvar list splitter.
+
+        If the splitter is set to `None`, which means that whitespace splits,
+        then leading and trailing whitespace is ignored.  Otherwise, leading
+        and trailing splitters usually lead to empty items being included.
+        """
+        return (rv or "").split(self.envvar_list_splitter)
+
+    def fail(
+        self,
+        message: str,
+        param: t.Optional["Parameter"] = None,
+        ctx: t.Optional["Context"] = None,
+    ) -> "t.NoReturn":
+        """Helper method to fail with an invalid value message."""
+        raise BadParameter(message, ctx=ctx, param=param)
+
+    def shell_complete(
+        self, ctx: "Context", param: "Parameter", incomplete: str
+    ) -> t.List["CompletionItem"]:
+        """Return a list of
+        :class:`~click.shell_completion.CompletionItem` objects for the
+        incomplete value. Most types do not provide completions, but
+        some do, and this allows custom types to provide custom
+        completions as well.
+
+        :param ctx: Invocation context for this command.
+        :param param: The parameter that is requesting completion.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        return []
+
+
+class CompositeParamType(ParamType):
+    is_composite = True
+
+    @property
+    def arity(self) -> int:  # type: ignore
+        raise NotImplementedError()
+
+
+class FuncParamType(ParamType):
+    def __init__(self, func: t.Callable[[t.Any], t.Any]) -> None:
+        self.name = func.__name__
+        self.func = func
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict["func"] = self.func
+        return info_dict
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        try:
+            return self.func(value)
+        except ValueError:
+            try:
+                value = str(value)
+            except UnicodeError:
+                value = value.decode("utf-8", "replace")
+
+            self.fail(value, param, ctx)
+
+
+class UnprocessedParamType(ParamType):
+    name = "text"
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        return value
+
+    def __repr__(self) -> str:
+        return "UNPROCESSED"
+
+
+class StringParamType(ParamType):
+    name = "text"
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        if isinstance(value, bytes):
+            enc = _get_argv_encoding()
+            try:
+                value = value.decode(enc)
+            except UnicodeError:
+                fs_enc = get_filesystem_encoding()
+                if fs_enc != enc:
+                    try:
+                        value = value.decode(fs_enc)
+                    except UnicodeError:
+                        value = value.decode("utf-8", "replace")
+                else:
+                    value = value.decode("utf-8", "replace")
+            return value
+        return str(value)
+
+    def __repr__(self) -> str:
+        return "STRING"
+
+
+class Choice(ParamType):
+    """The choice type allows a value to be checked against a fixed set
+    of supported values. All of these values have to be strings.
+
+    You should only pass a list or tuple of choices. Other iterables
+    (like generators) may lead to surprising results.
+
+    The resulting value will always be one of the originally passed choices
+    regardless of ``case_sensitive`` or any ``ctx.token_normalize_func``
+    being specified.
+
+    See :ref:`choice-opts` for an example.
+
+    :param case_sensitive: Set to false to make choices case
+        insensitive. Defaults to true.
+    """
+
+    name = "choice"
+
+    def __init__(self, choices: t.Sequence[str], case_sensitive: bool = True) -> None:
+        self.choices = choices
+        self.case_sensitive = case_sensitive
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict["choices"] = self.choices
+        info_dict["case_sensitive"] = self.case_sensitive
+        return info_dict
+
+    def get_metavar(self, param: "Parameter") -> str:
+        choices_str = "|".join(self.choices)
+
+        # Use curly braces to indicate a required argument.
+        if param.required and param.param_type_name == "argument":
+            return f"{{{choices_str}}}"
+
+        # Use square braces to indicate an option or optional argument.
+        return f"[{choices_str}]"
+
+    def get_missing_message(self, param: "Parameter") -> str:
+        return _("Choose from:\n\t{choices}").format(choices=",\n\t".join(self.choices))
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        # Match through normalization and case sensitivity
+        # first do token_normalize_func, then lowercase
+        # preserve original `value` to produce an accurate message in
+        # `self.fail`
+        normed_value = value
+        normed_choices = {choice: choice for choice in self.choices}
+
+        if ctx is not None and ctx.token_normalize_func is not None:
+            normed_value = ctx.token_normalize_func(value)
+            normed_choices = {
+                ctx.token_normalize_func(normed_choice): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if not self.case_sensitive:
+            normed_value = normed_value.casefold()
+            normed_choices = {
+                normed_choice.casefold(): original
+                for normed_choice, original in normed_choices.items()
+            }
+
+        if normed_value in normed_choices:
+            return normed_choices[normed_value]
+
+        choices_str = ", ".join(map(repr, self.choices))
+        self.fail(
+            ngettext(
+                "{value!r} is not {choice}.",
+                "{value!r} is not one of {choices}.",
+                len(self.choices),
+            ).format(value=value, choice=choices_str, choices=choices_str),
+            param,
+            ctx,
+        )
+
+    def __repr__(self) -> str:
+        return f"Choice({list(self.choices)})"
+
+    def shell_complete(
+        self, ctx: "Context", param: "Parameter", incomplete: str
+    ) -> t.List["CompletionItem"]:
+        """Complete choices that start with the incomplete value.
+
+        :param ctx: Invocation context for this command.
+        :param param: The parameter that is requesting completion.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        str_choices = map(str, self.choices)
+
+        if self.case_sensitive:
+            matched = (c for c in str_choices if c.startswith(incomplete))
+        else:
+            incomplete = incomplete.lower()
+            matched = (c for c in str_choices if c.lower().startswith(incomplete))
+
+        return [CompletionItem(c) for c in matched]
+
+
+class DateTime(ParamType):
+    """The DateTime type converts date strings into `datetime` objects.
+
+    The format strings which are checked are configurable, but default to some
+    common (non-timezone aware) ISO 8601 formats.
+
+    When specifying *DateTime* formats, you should only pass a list or a tuple.
+    Other iterables, like generators, may lead to surprising results.
+
+    The format strings are processed using ``datetime.strptime``, and this
+    consequently defines the format strings which are allowed.
+
+    Parsing is tried using each format, in order, and the first format which
+    parses successfully is used.
+
+    :param formats: A list or tuple of date format strings, in the order in
+                    which they should be tried. Defaults to
+                    ``'%Y-%m-%d'``, ``'%Y-%m-%dT%H:%M:%S'``,
+                    ``'%Y-%m-%d %H:%M:%S'``.
+    """
+
+    name = "datetime"
+
+    def __init__(self, formats: t.Optional[t.Sequence[str]] = None):
+        self.formats = formats or ["%Y-%m-%d", "%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"]
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict["formats"] = self.formats
+        return info_dict
+
+    def get_metavar(self, param: "Parameter") -> str:
+        return f"[{'|'.join(self.formats)}]"
+
+    def _try_to_convert_date(self, value: t.Any, format: str) -> t.Optional[datetime]:
+        try:
+            return datetime.strptime(value, format)
+        except ValueError:
+            return None
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        if isinstance(value, datetime):
+            return value
+
+        for format in self.formats:
+            converted = self._try_to_convert_date(value, format)
+
+            if converted is not None:
+                return converted
+
+        formats_str = ", ".join(map(repr, self.formats))
+        self.fail(
+            ngettext(
+                "{value!r} does not match the format {format}.",
+                "{value!r} does not match the formats {formats}.",
+                len(self.formats),
+            ).format(value=value, format=formats_str, formats=formats_str),
+            param,
+            ctx,
+        )
+
+    def __repr__(self) -> str:
+        return "DateTime"
+
+
+class _NumberParamTypeBase(ParamType):
+    _number_class: t.ClassVar[t.Type]
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        try:
+            return self._number_class(value)
+        except ValueError:
+            self.fail(
+                _("{value!r} is not a valid {number_type}.").format(
+                    value=value, number_type=self.name
+                ),
+                param,
+                ctx,
+            )
+
+
+class _NumberRangeBase(_NumberParamTypeBase):
+    def __init__(
+        self,
+        min: t.Optional[float] = None,
+        max: t.Optional[float] = None,
+        min_open: bool = False,
+        max_open: bool = False,
+        clamp: bool = False,
+    ) -> None:
+        self.min = min
+        self.max = max
+        self.min_open = min_open
+        self.max_open = max_open
+        self.clamp = clamp
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict.update(
+            min=self.min,
+            max=self.max,
+            min_open=self.min_open,
+            max_open=self.max_open,
+            clamp=self.clamp,
+        )
+        return info_dict
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        import operator
+
+        rv = super().convert(value, param, ctx)
+        lt_min: bool = self.min is not None and (
+            operator.le if self.min_open else operator.lt
+        )(rv, self.min)
+        gt_max: bool = self.max is not None and (
+            operator.ge if self.max_open else operator.gt
+        )(rv, self.max)
+
+        if self.clamp:
+            if lt_min:
+                return self._clamp(self.min, 1, self.min_open)  # type: ignore
+
+            if gt_max:
+                return self._clamp(self.max, -1, self.max_open)  # type: ignore
+
+        if lt_min or gt_max:
+            self.fail(
+                _("{value} is not in the range {range}.").format(
+                    value=rv, range=self._describe_range()
+                ),
+                param,
+                ctx,
+            )
+
+        return rv
+
+    def _clamp(self, bound: float, dir: "te.Literal[1, -1]", open: bool) -> float:
+        """Find the valid value to clamp to bound in the given
+        direction.
+
+        :param bound: The boundary value.
+        :param dir: 1 or -1 indicating the direction to move.
+        :param open: If true, the range does not include the bound.
+        """
+        raise NotImplementedError
+
+    def _describe_range(self) -> str:
+        """Describe the range for use in help text."""
+        if self.min is None:
+            op = "<" if self.max_open else "<="
+            return f"x{op}{self.max}"
+
+        if self.max is None:
+            op = ">" if self.min_open else ">="
+            return f"x{op}{self.min}"
+
+        lop = "<" if self.min_open else "<="
+        rop = "<" if self.max_open else "<="
+        return f"{self.min}{lop}x{rop}{self.max}"
+
+    def __repr__(self) -> str:
+        clamp = " clamped" if self.clamp else ""
+        return f"<{type(self).__name__} {self._describe_range()}{clamp}>"
+
+
+class IntParamType(_NumberParamTypeBase):
+    name = "integer"
+    _number_class = int
+
+    def __repr__(self) -> str:
+        return "INT"
+
+
+class IntRange(_NumberRangeBase, IntParamType):
+    """Restrict an :data:`click.INT` value to a range of accepted
+    values. See :ref:`ranges`.
+
+    If ``min`` or ``max`` are not passed, any value is accepted in that
+    direction. If ``min_open`` or ``max_open`` are enabled, the
+    corresponding boundary is not included in the range.
+
+    If ``clamp`` is enabled, a value outside the range is clamped to the
+    boundary instead of failing.
+
+    .. versionchanged:: 8.0
+        Added the ``min_open`` and ``max_open`` parameters.
+    """
+
+    name = "integer range"
+
+    def _clamp(  # type: ignore
+        self, bound: int, dir: "te.Literal[1, -1]", open: bool
+    ) -> int:
+        if not open:
+            return bound
+
+        return bound + dir
+
+
+class FloatParamType(_NumberParamTypeBase):
+    name = "float"
+    _number_class = float
+
+    def __repr__(self) -> str:
+        return "FLOAT"
+
+
+class FloatRange(_NumberRangeBase, FloatParamType):
+    """Restrict a :data:`click.FLOAT` value to a range of accepted
+    values. See :ref:`ranges`.
+
+    If ``min`` or ``max`` are not passed, any value is accepted in that
+    direction. If ``min_open`` or ``max_open`` are enabled, the
+    corresponding boundary is not included in the range.
+
+    If ``clamp`` is enabled, a value outside the range is clamped to the
+    boundary instead of failing. This is not supported if either
+    boundary is marked ``open``.
+
+    .. versionchanged:: 8.0
+        Added the ``min_open`` and ``max_open`` parameters.
+    """
+
+    name = "float range"
+
+    def __init__(
+        self,
+        min: t.Optional[float] = None,
+        max: t.Optional[float] = None,
+        min_open: bool = False,
+        max_open: bool = False,
+        clamp: bool = False,
+    ) -> None:
+        super().__init__(
+            min=min, max=max, min_open=min_open, max_open=max_open, clamp=clamp
+        )
+
+        if (min_open or max_open) and clamp:
+            raise TypeError("Clamping is not supported for open bounds.")
+
+    def _clamp(self, bound: float, dir: "te.Literal[1, -1]", open: bool) -> float:
+        if not open:
+            return bound
+
+        # Could use Python 3.9's math.nextafter here, but clamping an
+        # open float range doesn't seem to be particularly useful. It's
+        # left up to the user to write a callback to do it if needed.
+        raise RuntimeError("Clamping is not supported for open bounds.")
+
+
+class BoolParamType(ParamType):
+    name = "boolean"
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        if value in {False, True}:
+            return bool(value)
+
+        norm = value.strip().lower()
+
+        if norm in {"1", "true", "t", "yes", "y", "on"}:
+            return True
+
+        if norm in {"0", "false", "f", "no", "n", "off"}:
+            return False
+
+        self.fail(
+            _("{value!r} is not a valid boolean.").format(value=value), param, ctx
+        )
+
+    def __repr__(self) -> str:
+        return "BOOL"
+
+
+class UUIDParameterType(ParamType):
+    name = "uuid"
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        import uuid
+
+        if isinstance(value, uuid.UUID):
+            return value
+
+        value = value.strip()
+
+        try:
+            return uuid.UUID(value)
+        except ValueError:
+            self.fail(
+                _("{value!r} is not a valid UUID.").format(value=value), param, ctx
+            )
+
+    def __repr__(self) -> str:
+        return "UUID"
+
+
+class File(ParamType):
+    """Declares a parameter to be a file for reading or writing.  The file
+    is automatically closed once the context tears down (after the command
+    finished working).
+
+    Files can be opened for reading or writing.  The special value ``-``
+    indicates stdin or stdout depending on the mode.
+
+    By default, the file is opened for reading text data, but it can also be
+    opened in binary mode or for writing.  The encoding parameter can be used
+    to force a specific encoding.
+
+    The `lazy` flag controls if the file should be opened immediately or upon
+    first IO. The default is to be non-lazy for standard input and output
+    streams as well as files opened for reading, `lazy` otherwise. When opening a
+    file lazily for reading, it is still opened temporarily for validation, but
+    will not be held open until first IO. lazy is mainly useful when opening
+    for writing to avoid creating the file until it is needed.
+
+    Starting with Click 2.0, files can also be opened atomically in which
+    case all writes go into a separate file in the same folder and upon
+    completion the file will be moved over to the original location.  This
+    is useful if a file regularly read by other users is modified.
+
+    See :ref:`file-args` for more information.
+    """
+
+    name = "filename"
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self,
+        mode: str = "r",
+        encoding: t.Optional[str] = None,
+        errors: t.Optional[str] = "strict",
+        lazy: t.Optional[bool] = None,
+        atomic: bool = False,
+    ) -> None:
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.lazy = lazy
+        self.atomic = atomic
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict.update(mode=self.mode, encoding=self.encoding)
+        return info_dict
+
+    def resolve_lazy_flag(self, value: t.Any) -> bool:
+        if self.lazy is not None:
+            return self.lazy
+        if value == "-":
+            return False
+        elif "w" in self.mode:
+            return True
+        return False
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        try:
+            if hasattr(value, "read") or hasattr(value, "write"):
+                return value
+
+            lazy = self.resolve_lazy_flag(value)
+
+            if lazy:
+                f: t.IO = t.cast(
+                    t.IO,
+                    LazyFile(
+                        value, self.mode, self.encoding, self.errors, atomic=self.atomic
+                    ),
+                )
+
+                if ctx is not None:
+                    ctx.call_on_close(f.close_intelligently)  # type: ignore
+
+                return f
+
+            f, should_close = open_stream(
+                value, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+
+            # If a context is provided, we automatically close the file
+            # at the end of the context execution (or flush out).  If a
+            # context does not exist, it's the caller's responsibility to
+            # properly close the file.  This for instance happens when the
+            # type is used with prompts.
+            if ctx is not None:
+                if should_close:
+                    ctx.call_on_close(safecall(f.close))
+                else:
+                    ctx.call_on_close(safecall(f.flush))
+
+            return f
+        except OSError as e:  # noqa: B014
+            self.fail(f"'{os.fsdecode(value)}': {e.strerror}", param, ctx)
+
+    def shell_complete(
+        self, ctx: "Context", param: "Parameter", incomplete: str
+    ) -> t.List["CompletionItem"]:
+        """Return a special completion marker that tells the completion
+        system to use the shell to provide file path completions.
+
+        :param ctx: Invocation context for this command.
+        :param param: The parameter that is requesting completion.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        return [CompletionItem(incomplete, type="file")]
+
+
+class Path(ParamType):
+    """The ``Path`` type is similar to the :class:`File` type, but
+    returns the filename instead of an open file. Various checks can be
+    enabled to validate the type of file and permissions.
+
+    :param exists: The file or directory needs to exist for the value to
+        be valid. If this is not set to ``True``, and the file does not
+        exist, then all further checks are silently skipped.
+    :param file_okay: Allow a file as a value.
+    :param dir_okay: Allow a directory as a value.
+    :param readable: if true, a readable check is performed.
+    :param writable: if true, a writable check is performed.
+    :param executable: if true, an executable check is performed.
+    :param resolve_path: Make the value absolute and resolve any
+        symlinks. A ``~`` is not expanded, as this is supposed to be
+        done by the shell only.
+    :param allow_dash: Allow a single dash as a value, which indicates
+        a standard stream (but does not open it). Use
+        :func:`~click.open_file` to handle opening this value.
+    :param path_type: Convert the incoming path value to this type. If
+        ``None``, keep Python's default, which is ``str``. Useful to
+        convert to :class:`pathlib.Path`.
+
+    .. versionchanged:: 8.1
+        Added the ``executable`` parameter.
+
+    .. versionchanged:: 8.0
+        Allow passing ``type=pathlib.Path``.
+
+    .. versionchanged:: 6.0
+        Added the ``allow_dash`` parameter.
+    """
+
+    envvar_list_splitter = os.path.pathsep
+
+    def __init__(
+        self,
+        exists: bool = False,
+        file_okay: bool = True,
+        dir_okay: bool = True,
+        writable: bool = False,
+        readable: bool = True,
+        resolve_path: bool = False,
+        allow_dash: bool = False,
+        path_type: t.Optional[t.Type] = None,
+        executable: bool = False,
+    ):
+        self.exists = exists
+        self.file_okay = file_okay
+        self.dir_okay = dir_okay
+        self.readable = readable
+        self.writable = writable
+        self.executable = executable
+        self.resolve_path = resolve_path
+        self.allow_dash = allow_dash
+        self.type = path_type
+
+        if self.file_okay and not self.dir_okay:
+            self.name = _("file")
+        elif self.dir_okay and not self.file_okay:
+            self.name = _("directory")
+        else:
+            self.name = _("path")
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict.update(
+            exists=self.exists,
+            file_okay=self.file_okay,
+            dir_okay=self.dir_okay,
+            writable=self.writable,
+            readable=self.readable,
+            allow_dash=self.allow_dash,
+        )
+        return info_dict
+
+    def coerce_path_result(self, rv: t.Any) -> t.Any:
+        if self.type is not None and not isinstance(rv, self.type):
+            if self.type is str:
+                rv = os.fsdecode(rv)
+            elif self.type is bytes:
+                rv = os.fsencode(rv)
+            else:
+                rv = self.type(rv)
+
+        return rv
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        rv = value
+
+        is_dash = self.file_okay and self.allow_dash and rv in (b"-", "-")
+
+        if not is_dash:
+            if self.resolve_path:
+                # os.path.realpath doesn't resolve symlinks on Windows
+                # until Python 3.8. Use pathlib for now.
+                import pathlib
+
+                rv = os.fsdecode(pathlib.Path(rv).resolve())
+
+            try:
+                st = os.stat(rv)
+            except OSError:
+                if not self.exists:
+                    return self.coerce_path_result(rv)
+                self.fail(
+                    _("{name} {filename!r} does not exist.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if not self.file_okay and stat.S_ISREG(st.st_mode):
+                self.fail(
+                    _("{name} {filename!r} is a file.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+            if not self.dir_okay and stat.S_ISDIR(st.st_mode):
+                self.fail(
+                    _("{name} '{filename}' is a directory.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if self.readable and not os.access(rv, os.R_OK):
+                self.fail(
+                    _("{name} {filename!r} is not readable.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if self.writable and not os.access(rv, os.W_OK):
+                self.fail(
+                    _("{name} {filename!r} is not writable.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+            if self.executable and not os.access(value, os.X_OK):
+                self.fail(
+                    _("{name} {filename!r} is not executable.").format(
+                        name=self.name.title(), filename=os.fsdecode(value)
+                    ),
+                    param,
+                    ctx,
+                )
+
+        return self.coerce_path_result(rv)
+
+    def shell_complete(
+        self, ctx: "Context", param: "Parameter", incomplete: str
+    ) -> t.List["CompletionItem"]:
+        """Return a special completion marker that tells the completion
+        system to use the shell to provide path completions for only
+        directories or any paths.
+
+        :param ctx: Invocation context for this command.
+        :param param: The parameter that is requesting completion.
+        :param incomplete: Value being completed. May be empty.
+
+        .. versionadded:: 8.0
+        """
+        from click.shell_completion import CompletionItem
+
+        type = "dir" if self.dir_okay and not self.file_okay else "file"
+        return [CompletionItem(incomplete, type=type)]
+
+
+class Tuple(CompositeParamType):
+    """The default behavior of Click is to apply a type on a value directly.
+    This works well in most cases, except for when `nargs` is set to a fixed
+    count and different types should be used for different items.  In this
+    case the :class:`Tuple` type can be used.  This type can only be used
+    if `nargs` is set to a fixed number.
+
+    For more information see :ref:`tuple-type`.
+
+    This can be selected by using a Python tuple literal as a type.
+
+    :param types: a list of types that should be used for the tuple items.
+    """
+
+    def __init__(self, types: t.Sequence[t.Union[t.Type, ParamType]]) -> None:
+        self.types = [convert_type(ty) for ty in types]
+
+    def to_info_dict(self) -> t.Dict[str, t.Any]:
+        info_dict = super().to_info_dict()
+        info_dict["types"] = [t.to_info_dict() for t in self.types]
+        return info_dict
+
+    @property
+    def name(self) -> str:  # type: ignore
+        return f"<{' '.join(ty.name for ty in self.types)}>"
+
+    @property
+    def arity(self) -> int:  # type: ignore
+        return len(self.types)
+
+    def convert(
+        self, value: t.Any, param: t.Optional["Parameter"], ctx: t.Optional["Context"]
+    ) -> t.Any:
+        len_type = len(self.types)
+        len_value = len(value)
+
+        if len_value != len_type:
+            self.fail(
+                ngettext(
+                    "{len_type} values are required, but {len_value} was given.",
+                    "{len_type} values are required, but {len_value} were given.",
+                    len_value,
+                ).format(len_type=len_type, len_value=len_value),
+                param=param,
+                ctx=ctx,
+            )
+
+        return tuple(ty(x, param, ctx) for ty, x in zip(self.types, value))
+
+
+def convert_type(ty: t.Optional[t.Any], default: t.Optional[t.Any] = None) -> ParamType:
+    """Find the most appropriate :class:`ParamType` for the given Python
+    type. If the type isn't provided, it can be inferred from a default
+    value.
+    """
+    guessed_type = False
+
+    if ty is None and default is not None:
+        if isinstance(default, (tuple, list)):
+            # If the default is empty, ty will remain None and will
+            # return STRING.
+            if default:
+                item = default[0]
+
+                # A tuple of tuples needs to detect the inner types.
+                # Can't call convert recursively because that would
+                # incorrectly unwind the tuple to a single type.
+                if isinstance(item, (tuple, list)):
+                    ty = tuple(map(type, item))
+                else:
+                    ty = type(item)
+        else:
+            ty = type(default)
+
+        guessed_type = True
+
+    if isinstance(ty, tuple):
+        return Tuple(ty)
+
+    if isinstance(ty, ParamType):
+        return ty
+
+    if ty is str or ty is None:
+        return STRING
+
+    if ty is int:
+        return INT
+
+    if ty is float:
+        return FLOAT
+
+    if ty is bool:
+        return BOOL
+
+    if guessed_type:
+        return STRING
+
+    if __debug__:
+        try:
+            if issubclass(ty, ParamType):
+                raise AssertionError(
+                    f"Attempted to use an uninstantiated parameter type ({ty})."
+                )
+        except TypeError:
+            # ty is an instance (correct), so issubclass fails.
+            pass
+
+    return FuncParamType(ty)
+
+
+#: A dummy parameter type that just does nothing.  From a user's
+#: perspective this appears to just be the same as `STRING` but
+#: internally no string conversion takes place if the input was bytes.
+#: This is usually useful when working with file paths as they can
+#: appear in bytes and unicode.
+#:
+#: For path related uses the :class:`Path` type is a better choice but
+#: there are situations where an unprocessed type is useful which is why
+#: it is is provided.
+#:
+#: .. versionadded:: 4.0
+UNPROCESSED = UnprocessedParamType()
+
+#: A unicode string parameter type which is the implicit default.  This
+#: can also be selected by using ``str`` as type.
+STRING = StringParamType()
+
+#: An integer parameter.  This can also be selected by using ``int`` as
+#: type.
+INT = IntParamType()
+
+#: A floating point value parameter.  This can also be selected by using
+#: ``float`` as type.
+FLOAT = FloatParamType()
+
+#: A boolean parameter.  This is the default for boolean flags.  This can
+#: also be selected by using ``bool`` as a type.
+BOOL = BoolParamType()
+
+#: A UUID parameter.
+UUID = UUIDParameterType()
diff --git a/venv/lib/python3.9/site-packages/click/utils.py b/venv/lib/python3.9/site-packages/click/utils.py
new file mode 100644
index 0000000..8283788
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/click/utils.py
@@ -0,0 +1,580 @@
+import os
+import re
+import sys
+import typing as t
+from functools import update_wrapper
+from types import ModuleType
+
+from ._compat import _default_text_stderr
+from ._compat import _default_text_stdout
+from ._compat import _find_binary_writer
+from ._compat import auto_wrap_for_ansi
+from ._compat import binary_streams
+from ._compat import get_filesystem_encoding
+from ._compat import open_stream
+from ._compat import should_strip_ansi
+from ._compat import strip_ansi
+from ._compat import text_streams
+from ._compat import WIN
+from .globals import resolve_color_default
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+
+def _posixify(name: str) -> str:
+    return "-".join(name.split()).lower()
+
+
+def safecall(func: F) -> F:
+    """Wraps a function so that it swallows exceptions."""
+
+    def wrapper(*args, **kwargs):  # type: ignore
+        try:
+            return func(*args, **kwargs)
+        except Exception:
+            pass
+
+    return update_wrapper(t.cast(F, wrapper), func)
+
+
+def make_str(value: t.Any) -> str:
+    """Converts a value into a valid string."""
+    if isinstance(value, bytes):
+        try:
+            return value.decode(get_filesystem_encoding())
+        except UnicodeError:
+            return value.decode("utf-8", "replace")
+    return str(value)
+
+
+def make_default_short_help(help: str, max_length: int = 45) -> str:
+    """Returns a condensed version of help string."""
+    # Consider only the first paragraph.
+    paragraph_end = help.find("\n\n")
+
+    if paragraph_end != -1:
+        help = help[:paragraph_end]
+
+    # Collapse newlines, tabs, and spaces.
+    words = help.split()
+
+    if not words:
+        return ""
+
+    # The first paragraph started with a "no rewrap" marker, ignore it.
+    if words[0] == "\b":
+        words = words[1:]
+
+    total_length = 0
+    last_index = len(words) - 1
+
+    for i, word in enumerate(words):
+        total_length += len(word) + (i > 0)
+
+        if total_length > max_length:  # too long, truncate
+            break
+
+        if word[-1] == ".":  # sentence end, truncate without "..."
+            return " ".join(words[: i + 1])
+
+        if total_length == max_length and i != last_index:
+            break  # not at sentence end, truncate with "..."
+    else:
+        return " ".join(words)  # no truncation needed
+
+    # Account for the length of the suffix.
+    total_length += len("...")
+
+    # remove words until the length is short enough
+    while i > 0:
+        total_length -= len(words[i]) + (i > 0)
+
+        if total_length <= max_length:
+            break
+
+        i -= 1
+
+    return " ".join(words[:i]) + "..."
+
+
+class LazyFile:
+    """A lazy file works like a regular file but it does not fully open
+    the file but it does perform some basic checks early to see if the
+    filename parameter does make sense.  This is useful for safely opening
+    files for writing.
+    """
+
+    def __init__(
+        self,
+        filename: str,
+        mode: str = "r",
+        encoding: t.Optional[str] = None,
+        errors: t.Optional[str] = "strict",
+        atomic: bool = False,
+    ):
+        self.name = filename
+        self.mode = mode
+        self.encoding = encoding
+        self.errors = errors
+        self.atomic = atomic
+        self._f: t.Optional[t.IO]
+
+        if filename == "-":
+            self._f, self.should_close = open_stream(filename, mode, encoding, errors)
+        else:
+            if "r" in mode:
+                # Open and close the file in case we're opening it for
+                # reading so that we can catch at least some errors in
+                # some cases early.
+                open(filename, mode).close()
+            self._f = None
+            self.should_close = True
+
+    def __getattr__(self, name: str) -> t.Any:
+        return getattr(self.open(), name)
+
+    def __repr__(self) -> str:
+        if self._f is not None:
+            return repr(self._f)
+        return f"<unopened file '{self.name}' {self.mode}>"
+
+    def open(self) -> t.IO:
+        """Opens the file if it's not yet open.  This call might fail with
+        a :exc:`FileError`.  Not handling this error will produce an error
+        that Click shows.
+        """
+        if self._f is not None:
+            return self._f
+        try:
+            rv, self.should_close = open_stream(
+                self.name, self.mode, self.encoding, self.errors, atomic=self.atomic
+            )
+        except OSError as e:  # noqa: E402
+            from .exceptions import FileError
+
+            raise FileError(self.name, hint=e.strerror) from e
+        self._f = rv
+        return rv
+
+    def close(self) -> None:
+        """Closes the underlying file, no matter what."""
+        if self._f is not None:
+            self._f.close()
+
+    def close_intelligently(self) -> None:
+        """This function only closes the file if it was opened by the lazy
+        file wrapper.  For instance this will never close stdin.
+        """
+        if self.should_close:
+            self.close()
+
+    def __enter__(self) -> "LazyFile":
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        self.close_intelligently()
+
+    def __iter__(self) -> t.Iterator[t.AnyStr]:
+        self.open()
+        return iter(self._f)  # type: ignore
+
+
+class KeepOpenFile:
+    def __init__(self, file: t.IO) -> None:
+        self._file = file
+
+    def __getattr__(self, name: str) -> t.Any:
+        return getattr(self._file, name)
+
+    def __enter__(self) -> "KeepOpenFile":
+        return self
+
+    def __exit__(self, exc_type, exc_value, tb):  # type: ignore
+        pass
+
+    def __repr__(self) -> str:
+        return repr(self._file)
+
+    def __iter__(self) -> t.Iterator[t.AnyStr]:
+        return iter(self._file)
+
+
+def echo(
+    message: t.Optional[t.Any] = None,
+    file: t.Optional[t.IO[t.Any]] = None,
+    nl: bool = True,
+    err: bool = False,
+    color: t.Optional[bool] = None,
+) -> None:
+    """Print a message and newline to stdout or a file. This should be
+    used instead of :func:`print` because it provides better support
+    for different data, files, and environments.
+
+    Compared to :func:`print`, this does the following:
+
+    -   Ensures that the output encoding is not misconfigured on Linux.
+    -   Supports Unicode in the Windows console.
+    -   Supports writing to binary outputs, and supports writing bytes
+        to text outputs.
+    -   Supports colors and styles on Windows.
+    -   Removes ANSI color and style codes if the output does not look
+        like an interactive terminal.
+    -   Always flushes the output.
+
+    :param message: The string or bytes to output. Other objects are
+        converted to strings.
+    :param file: The file to write to. Defaults to ``stdout``.
+    :param err: Write to ``stderr`` instead of ``stdout``.
+    :param nl: Print a newline after the message. Enabled by default.
+    :param color: Force showing or hiding colors and other styles. By
+        default Click will remove color if the output does not look like
+        an interactive terminal.
+
+    .. versionchanged:: 6.0
+        Support Unicode output on the Windows console. Click does not
+        modify ``sys.stdout``, so ``sys.stdout.write()`` and ``print()``
+        will still not support Unicode.
+
+    .. versionchanged:: 4.0
+        Added the ``color`` parameter.
+
+    .. versionadded:: 3.0
+        Added the ``err`` parameter.
+
+    .. versionchanged:: 2.0
+        Support colors on Windows if colorama is installed.
+    """
+    if file is None:
+        if err:
+            file = _default_text_stderr()
+        else:
+            file = _default_text_stdout()
+
+    # Convert non bytes/text into the native string type.
+    if message is not None and not isinstance(message, (str, bytes, bytearray)):
+        out: t.Optional[t.Union[str, bytes]] = str(message)
+    else:
+        out = message
+
+    if nl:
+        out = out or ""
+        if isinstance(out, str):
+            out += "\n"
+        else:
+            out += b"\n"
+
+    if not out:
+        file.flush()
+        return
+
+    # If there is a message and the value looks like bytes, we manually
+    # need to find the binary stream and write the message in there.
+    # This is done separately so that most stream types will work as you
+    # would expect. Eg: you can write to StringIO for other cases.
+    if isinstance(out, (bytes, bytearray)):
+        binary_file = _find_binary_writer(file)
+
+        if binary_file is not None:
+            file.flush()
+            binary_file.write(out)
+            binary_file.flush()
+            return
+
+    # ANSI style code support. For no message or bytes, nothing happens.
+    # When outputting to a file instead of a terminal, strip codes.
+    else:
+        color = resolve_color_default(color)
+
+        if should_strip_ansi(file, color):
+            out = strip_ansi(out)
+        elif WIN:
+            if auto_wrap_for_ansi is not None:
+                file = auto_wrap_for_ansi(file)  # type: ignore
+            elif not color:
+                out = strip_ansi(out)
+
+    file.write(out)  # type: ignore
+    file.flush()
+
+
+def get_binary_stream(name: "te.Literal['stdin', 'stdout', 'stderr']") -> t.BinaryIO:
+    """Returns a system stream for byte processing.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    """
+    opener = binary_streams.get(name)
+    if opener is None:
+        raise TypeError(f"Unknown standard stream '{name}'")
+    return opener()
+
+
+def get_text_stream(
+    name: "te.Literal['stdin', 'stdout', 'stderr']",
+    encoding: t.Optional[str] = None,
+    errors: t.Optional[str] = "strict",
+) -> t.TextIO:
+    """Returns a system stream for text processing.  This usually returns
+    a wrapped stream around a binary stream returned from
+    :func:`get_binary_stream` but it also can take shortcuts for already
+    correctly configured streams.
+
+    :param name: the name of the stream to open.  Valid names are ``'stdin'``,
+                 ``'stdout'`` and ``'stderr'``
+    :param encoding: overrides the detected default encoding.
+    :param errors: overrides the default error mode.
+    """
+    opener = text_streams.get(name)
+    if opener is None:
+        raise TypeError(f"Unknown standard stream '{name}'")
+    return opener(encoding, errors)
+
+
+def open_file(
+    filename: str,
+    mode: str = "r",
+    encoding: t.Optional[str] = None,
+    errors: t.Optional[str] = "strict",
+    lazy: bool = False,
+    atomic: bool = False,
+) -> t.IO:
+    """Open a file, with extra behavior to handle ``'-'`` to indicate
+    a standard stream, lazy open on write, and atomic write. Similar to
+    the behavior of the :class:`~click.File` param type.
+
+    If ``'-'`` is given to open ``stdout`` or ``stdin``, the stream is
+    wrapped so that using it in a context manager will not close it.
+    This makes it possible to use the function without accidentally
+    closing a standard stream:
+
+    .. code-block:: python
+
+        with open_file(filename) as f:
+            ...
+
+    :param filename: The name of the file to open, or ``'-'`` for
+        ``stdin``/``stdout``.
+    :param mode: The mode in which to open the file.
+    :param encoding: The encoding to decode or encode a file opened in
+        text mode.
+    :param errors: The error handling mode.
+    :param lazy: Wait to open the file until it is accessed. For read
+        mode, the file is temporarily opened to raise access errors
+        early, then closed until it is read again.
+    :param atomic: Write to a temporary file and replace the given file
+        on close.
+
+    .. versionadded:: 3.0
+    """
+    if lazy:
+        return t.cast(t.IO, LazyFile(filename, mode, encoding, errors, atomic=atomic))
+
+    f, should_close = open_stream(filename, mode, encoding, errors, atomic=atomic)
+
+    if not should_close:
+        f = t.cast(t.IO, KeepOpenFile(f))
+
+    return f
+
+
+def format_filename(
+    filename: t.Union[str, bytes, os.PathLike], shorten: bool = False
+) -> str:
+    """Formats a filename for user display.  The main purpose of this
+    function is to ensure that the filename can be displayed at all.  This
+    will decode the filename to unicode if necessary in a way that it will
+    not fail.  Optionally, it can shorten the filename to not include the
+    full path to the filename.
+
+    :param filename: formats a filename for UI display.  This will also convert
+                     the filename into unicode without failing.
+    :param shorten: this optionally shortens the filename to strip of the
+                    path that leads up to it.
+    """
+    if shorten:
+        filename = os.path.basename(filename)
+
+    return os.fsdecode(filename)
+
+
+def get_app_dir(app_name: str, roaming: bool = True, force_posix: bool = False) -> str:
+    r"""Returns the config folder for the application.  The default behavior
+    is to return whatever is most appropriate for the operating system.
+
+    To give you an idea, for an app called ``"Foo Bar"``, something like
+    the following folders could be returned:
+
+    Mac OS X:
+      ``~/Library/Application Support/Foo Bar``
+    Mac OS X (POSIX):
+      ``~/.foo-bar``
+    Unix:
+      ``~/.config/foo-bar``
+    Unix (POSIX):
+      ``~/.foo-bar``
+    Windows (roaming):
+      ``C:\Users\<user>\AppData\Roaming\Foo Bar``
+    Windows (not roaming):
+      ``C:\Users\<user>\AppData\Local\Foo Bar``
+
+    .. versionadded:: 2.0
+
+    :param app_name: the application name.  This should be properly capitalized
+                     and can contain whitespace.
+    :param roaming: controls if the folder should be roaming or not on Windows.
+                    Has no affect otherwise.
+    :param force_posix: if this is set to `True` then on any POSIX system the
+                        folder will be stored in the home folder with a leading
+                        dot instead of the XDG config home or darwin's
+                        application support folder.
+    """
+    if WIN:
+        key = "APPDATA" if roaming else "LOCALAPPDATA"
+        folder = os.environ.get(key)
+        if folder is None:
+            folder = os.path.expanduser("~")
+        return os.path.join(folder, app_name)
+    if force_posix:
+        return os.path.join(os.path.expanduser(f"~/.{_posixify(app_name)}"))
+    if sys.platform == "darwin":
+        return os.path.join(
+            os.path.expanduser("~/Library/Application Support"), app_name
+        )
+    return os.path.join(
+        os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")),
+        _posixify(app_name),
+    )
+
+
+class PacifyFlushWrapper:
+    """This wrapper is used to catch and suppress BrokenPipeErrors resulting
+    from ``.flush()`` being called on broken pipe during the shutdown/final-GC
+    of the Python interpreter. Notably ``.flush()`` is always called on
+    ``sys.stdout`` and ``sys.stderr``. So as to have minimal impact on any
+    other cleanup code, and the case where the underlying file is not a broken
+    pipe, all calls and attributes are proxied.
+    """
+
+    def __init__(self, wrapped: t.IO) -> None:
+        self.wrapped = wrapped
+
+    def flush(self) -> None:
+        try:
+            self.wrapped.flush()
+        except OSError as e:
+            import errno
+
+            if e.errno != errno.EPIPE:
+                raise
+
+    def __getattr__(self, attr: str) -> t.Any:
+        return getattr(self.wrapped, attr)
+
+
+def _detect_program_name(
+    path: t.Optional[str] = None, _main: t.Optional[ModuleType] = None
+) -> str:
+    """Determine the command used to run the program, for use in help
+    text. If a file or entry point was executed, the file name is
+    returned. If ``python -m`` was used to execute a module or package,
+    ``python -m name`` is returned.
+
+    This doesn't try to be too precise, the goal is to give a concise
+    name for help text. Files are only shown as their name without the
+    path. ``python`` is only shown for modules, and the full path to
+    ``sys.executable`` is not shown.
+
+    :param path: The Python file being executed. Python puts this in
+        ``sys.argv[0]``, which is used by default.
+    :param _main: The ``__main__`` module. This should only be passed
+        during internal testing.
+
+    .. versionadded:: 8.0
+        Based on command args detection in the Werkzeug reloader.
+
+    :meta private:
+    """
+    if _main is None:
+        _main = sys.modules["__main__"]
+
+    if not path:
+        path = sys.argv[0]
+
+    # The value of __package__ indicates how Python was called. It may
+    # not exist if a setuptools script is installed as an egg. It may be
+    # set incorrectly for entry points created with pip on Windows.
+    if getattr(_main, "__package__", None) is None or (
+        os.name == "nt"
+        and _main.__package__ == ""
+        and not os.path.exists(path)
+        and os.path.exists(f"{path}.exe")
+    ):
+        # Executed a file, like "python app.py".
+        return os.path.basename(path)
+
+    # Executed a module, like "python -m example".
+    # Rewritten by Python from "-m script" to "/path/to/script.py".
+    # Need to look at main module to determine how it was executed.
+    py_module = t.cast(str, _main.__package__)
+    name = os.path.splitext(os.path.basename(path))[0]
+
+    # A submodule like "example.cli".
+    if name != "__main__":
+        py_module = f"{py_module}.{name}"
+
+    return f"python -m {py_module.lstrip('.')}"
+
+
+def _expand_args(
+    args: t.Iterable[str],
+    *,
+    user: bool = True,
+    env: bool = True,
+    glob_recursive: bool = True,
+) -> t.List[str]:
+    """Simulate Unix shell expansion with Python functions.
+
+    See :func:`glob.glob`, :func:`os.path.expanduser`, and
+    :func:`os.path.expandvars`.
+
+    This is intended for use on Windows, where the shell does not do any
+    expansion. It may not exactly match what a Unix shell would do.
+
+    :param args: List of command line arguments to expand.
+    :param user: Expand user home directory.
+    :param env: Expand environment variables.
+    :param glob_recursive: ``**`` matches directories recursively.
+
+    .. versionchanged:: 8.1
+        Invalid glob patterns are treated as empty expansions rather
+        than raising an error.
+
+    .. versionadded:: 8.0
+
+    :meta private:
+    """
+    from glob import glob
+
+    out = []
+
+    for arg in args:
+        if user:
+            arg = os.path.expanduser(arg)
+
+        if env:
+            arg = os.path.expandvars(arg)
+
+        try:
+            matches = glob(arg, recursive=glob_recursive)
+        except re.error:
+            matches = []
+
+        if not matches:
+            out.append(arg)
+        else:
+            out.extend(matches)
+
+    return out
diff --git a/venv/lib/python3.9/site-packages/easy_install.py b/venv/lib/python3.9/site-packages/easy_install.py
new file mode 100644
index 0000000..d87e984
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/easy_install.py
@@ -0,0 +1,5 @@
+"""Run the EasyInstall command"""
+
+if __name__ == '__main__':
+    from setuptools.command.easy_install import main
+    main()
diff --git a/venv/lib/python3.9/site-packages/jinja2/__init__.py b/venv/lib/python3.9/site-packages/jinja2/__init__.py
new file mode 100644
index 0000000..e323926
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/__init__.py
@@ -0,0 +1,37 @@
+"""Jinja is a template engine written in pure Python. It provides a
+non-XML syntax that supports inline expressions and an optional
+sandboxed environment.
+"""
+from .bccache import BytecodeCache as BytecodeCache
+from .bccache import FileSystemBytecodeCache as FileSystemBytecodeCache
+from .bccache import MemcachedBytecodeCache as MemcachedBytecodeCache
+from .environment import Environment as Environment
+from .environment import Template as Template
+from .exceptions import TemplateAssertionError as TemplateAssertionError
+from .exceptions import TemplateError as TemplateError
+from .exceptions import TemplateNotFound as TemplateNotFound
+from .exceptions import TemplateRuntimeError as TemplateRuntimeError
+from .exceptions import TemplatesNotFound as TemplatesNotFound
+from .exceptions import TemplateSyntaxError as TemplateSyntaxError
+from .exceptions import UndefinedError as UndefinedError
+from .loaders import BaseLoader as BaseLoader
+from .loaders import ChoiceLoader as ChoiceLoader
+from .loaders import DictLoader as DictLoader
+from .loaders import FileSystemLoader as FileSystemLoader
+from .loaders import FunctionLoader as FunctionLoader
+from .loaders import ModuleLoader as ModuleLoader
+from .loaders import PackageLoader as PackageLoader
+from .loaders import PrefixLoader as PrefixLoader
+from .runtime import ChainableUndefined as ChainableUndefined
+from .runtime import DebugUndefined as DebugUndefined
+from .runtime import make_logging_undefined as make_logging_undefined
+from .runtime import StrictUndefined as StrictUndefined
+from .runtime import Undefined as Undefined
+from .utils import clear_caches as clear_caches
+from .utils import is_undefined as is_undefined
+from .utils import pass_context as pass_context
+from .utils import pass_environment as pass_environment
+from .utils import pass_eval_context as pass_eval_context
+from .utils import select_autoescape as select_autoescape
+
+__version__ = "3.1.2"
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diff --git a/venv/lib/python3.9/site-packages/jinja2/__pycache__/visitor.cpython-39.pyc b/venv/lib/python3.9/site-packages/jinja2/__pycache__/visitor.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/jinja2/_identifier.py b/venv/lib/python3.9/site-packages/jinja2/_identifier.py
new file mode 100644
index 0000000..928c150
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/_identifier.py
@@ -0,0 +1,6 @@
+import re
+
+# generated by scripts/generate_identifier_pattern.py
+pattern = re.compile(
+    r"[\w·̀-ͯ·҃-֑҇-ׇֽֿׁׂׅׄؐ-ًؚ-ٰٟۖ-ۜ۟-۪ۤۧۨ-ܑۭܰ-݊ަ-ް߫-߽߳ࠖ-࠙ࠛ-ࠣࠥ-ࠧࠩ-࡙࠭-࡛࣓-ࣣ࣡-ःऺ-़ा-ॏ॑-ॗॢॣঁ-ঃ়া-ৄেৈো-্ৗৢৣ৾ਁ-ਃ਼ਾ-ੂੇੈੋ-੍ੑੰੱੵઁ-ઃ઼ા-ૅે-ૉો-્ૢૣૺ-૿ଁ-ଃ଼ା-ୄେୈୋ-୍ୖୗୢୣஂா-ூெ-ைொ-்ௗఀ-ఄా-ౄె-ైొ-్ౕౖౢౣಁ-ಃ಼ಾ-ೄೆ-ೈೊ-್ೕೖೢೣഀ-ഃ഻഼ാ-ൄെ-ൈൊ-്ൗൢൣංඃ්ා-ුූෘ-ෟෲෳัิ-ฺ็-๎ັິ-ູົຼ່-ໍ༹༘༙༵༷༾༿ཱ-྄྆྇ྍ-ྗྙ-ྼ࿆ါ-ှၖ-ၙၞ-ၠၢ-ၤၧ-ၭၱ-ၴႂ-ႍႏႚ-ႝ፝-፟ᜒ-᜔ᜲ-᜴ᝒᝓᝲᝳ឴-៓៝᠋-᠍ᢅᢆᢩᤠ-ᤫᤰ-᤻ᨗ-ᨛᩕ-ᩞ᩠-᩿᩼᪰-᪽ᬀ-ᬄ᬴-᭄᭫-᭳ᮀ-ᮂᮡ-ᮭ᯦-᯳ᰤ-᰷᳐-᳔᳒-᳨᳭ᳲ-᳴᳷-᳹᷀-᷹᷻-᷿‿⁀⁔⃐-⃥⃜⃡-⃰℘℮⳯-⵿⳱ⷠ-〪ⷿ-゙゚〯꙯ꙴ-꙽ꚞꚟ꛰꛱ꠂ꠆ꠋꠣ-ꠧꢀꢁꢴ-ꣅ꣠-꣱ꣿꤦ-꤭ꥇ-꥓ꦀ-ꦃ꦳-꧀ꧥꨩ-ꨶꩃꩌꩍꩻ-ꩽꪰꪲ-ꪴꪷꪸꪾ꪿꫁ꫫ-ꫯꫵ꫶ꯣ-ꯪ꯬꯭ﬞ︀-️︠-︯︳︴﹍-﹏＿𐇽𐋠𐍶-𐍺𐨁-𐨃𐨅𐨆𐨌-𐨏𐨸-𐨿𐨺𐫦𐫥𐴤-𐽆𐴧-𐽐𑀀-𑀂𑀸-𑁆𑁿-𑂂𑂰-𑂺𑄀-𑄂𑄧-𑄴𑅅𑅆𑅳𑆀-𑆂𑆳-𑇀𑇉-𑇌𑈬-𑈷𑈾𑋟-𑋪𑌀-𑌃𑌻𑌼𑌾-𑍄𑍇𑍈𑍋-𑍍𑍗𑍢𑍣𑍦-𑍬𑍰-𑍴𑐵-𑑆𑑞𑒰-𑓃𑖯-𑖵𑖸-𑗀𑗜𑗝𑘰-𑙀𑚫-𑚷𑜝-𑜫𑠬-𑠺𑨁-𑨊𑨳-𑨹𑨻-𑨾𑩇𑩑-𑩛𑪊-𑪙𑰯-𑰶𑰸-𑰿𑲒-𑲧𑲩-𑲶𑴱-𑴶𑴺𑴼𑴽𑴿-𑵅𑵇𑶊-𑶎𑶐𑶑𑶓-𑶗𑻳-𑻶𖫰-𖫴𖬰-𖬶𖽑-𖽾𖾏-𖾒𛲝𛲞𝅥-𝅩𝅭-𝅲𝅻-𝆂𝆅-𝆋𝆪-𝆭𝉂-𝉄𝨀-𝨶𝨻-𝩬𝩵𝪄𝪛-𝪟𝪡-𝪯𞀀-𞀆𞀈-𞀘𞀛-𞀡𞀣𞀤𞀦-𞣐𞀪-𞣖𞥄-𞥊󠄀-󠇯]+"  # noqa: B950
+)
diff --git a/venv/lib/python3.9/site-packages/jinja2/async_utils.py b/venv/lib/python3.9/site-packages/jinja2/async_utils.py
new file mode 100644
index 0000000..1a4f389
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/async_utils.py
@@ -0,0 +1,84 @@
+import inspect
+import typing as t
+from functools import WRAPPER_ASSIGNMENTS
+from functools import wraps
+
+from .utils import _PassArg
+from .utils import pass_eval_context
+
+V = t.TypeVar("V")
+
+
+def async_variant(normal_func):  # type: ignore
+    def decorator(async_func):  # type: ignore
+        pass_arg = _PassArg.from_obj(normal_func)
+        need_eval_context = pass_arg is None
+
+        if pass_arg is _PassArg.environment:
+
+            def is_async(args: t.Any) -> bool:
+                return t.cast(bool, args[0].is_async)
+
+        else:
+
+            def is_async(args: t.Any) -> bool:
+                return t.cast(bool, args[0].environment.is_async)
+
+        # Take the doc and annotations from the sync function, but the
+        # name from the async function. Pallets-Sphinx-Themes
+        # build_function_directive expects __wrapped__ to point to the
+        # sync function.
+        async_func_attrs = ("__module__", "__name__", "__qualname__")
+        normal_func_attrs = tuple(set(WRAPPER_ASSIGNMENTS).difference(async_func_attrs))
+
+        @wraps(normal_func, assigned=normal_func_attrs)
+        @wraps(async_func, assigned=async_func_attrs, updated=())
+        def wrapper(*args, **kwargs):  # type: ignore
+            b = is_async(args)
+
+            if need_eval_context:
+                args = args[1:]
+
+            if b:
+                return async_func(*args, **kwargs)
+
+            return normal_func(*args, **kwargs)
+
+        if need_eval_context:
+            wrapper = pass_eval_context(wrapper)
+
+        wrapper.jinja_async_variant = True
+        return wrapper
+
+    return decorator
+
+
+_common_primitives = {int, float, bool, str, list, dict, tuple, type(None)}
+
+
+async def auto_await(value: t.Union[t.Awaitable["V"], "V"]) -> "V":
+    # Avoid a costly call to isawaitable
+    if type(value) in _common_primitives:
+        return t.cast("V", value)
+
+    if inspect.isawaitable(value):
+        return await t.cast("t.Awaitable[V]", value)
+
+    return t.cast("V", value)
+
+
+async def auto_aiter(
+    iterable: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+) -> "t.AsyncIterator[V]":
+    if hasattr(iterable, "__aiter__"):
+        async for item in t.cast("t.AsyncIterable[V]", iterable):
+            yield item
+    else:
+        for item in t.cast("t.Iterable[V]", iterable):
+            yield item
+
+
+async def auto_to_list(
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+) -> t.List["V"]:
+    return [x async for x in auto_aiter(value)]
diff --git a/venv/lib/python3.9/site-packages/jinja2/bccache.py b/venv/lib/python3.9/site-packages/jinja2/bccache.py
new file mode 100644
index 0000000..d0ddf56
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/bccache.py
@@ -0,0 +1,406 @@
+"""The optional bytecode cache system. This is useful if you have very
+complex template situations and the compilation of all those templates
+slows down your application too much.
+
+Situations where this is useful are often forking web applications that
+are initialized on the first request.
+"""
+import errno
+import fnmatch
+import marshal
+import os
+import pickle
+import stat
+import sys
+import tempfile
+import typing as t
+from hashlib import sha1
+from io import BytesIO
+from types import CodeType
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
+    class _MemcachedClient(te.Protocol):
+        def get(self, key: str) -> bytes:
+            ...
+
+        def set(self, key: str, value: bytes, timeout: t.Optional[int] = None) -> None:
+            ...
+
+
+bc_version = 5
+# Magic bytes to identify Jinja bytecode cache files. Contains the
+# Python major and minor version to avoid loading incompatible bytecode
+# if a project upgrades its Python version.
+bc_magic = (
+    b"j2"
+    + pickle.dumps(bc_version, 2)
+    + pickle.dumps((sys.version_info[0] << 24) | sys.version_info[1], 2)
+)
+
+
+class Bucket:
+    """Buckets are used to store the bytecode for one template.  It's created
+    and initialized by the bytecode cache and passed to the loading functions.
+
+    The buckets get an internal checksum from the cache assigned and use this
+    to automatically reject outdated cache material.  Individual bytecode
+    cache subclasses don't have to care about cache invalidation.
+    """
+
+    def __init__(self, environment: "Environment", key: str, checksum: str) -> None:
+        self.environment = environment
+        self.key = key
+        self.checksum = checksum
+        self.reset()
+
+    def reset(self) -> None:
+        """Resets the bucket (unloads the bytecode)."""
+        self.code: t.Optional[CodeType] = None
+
+    def load_bytecode(self, f: t.BinaryIO) -> None:
+        """Loads bytecode from a file or file like object."""
+        # make sure the magic header is correct
+        magic = f.read(len(bc_magic))
+        if magic != bc_magic:
+            self.reset()
+            return
+        # the source code of the file changed, we need to reload
+        checksum = pickle.load(f)
+        if self.checksum != checksum:
+            self.reset()
+            return
+        # if marshal_load fails then we need to reload
+        try:
+            self.code = marshal.load(f)
+        except (EOFError, ValueError, TypeError):
+            self.reset()
+            return
+
+    def write_bytecode(self, f: t.IO[bytes]) -> None:
+        """Dump the bytecode into the file or file like object passed."""
+        if self.code is None:
+            raise TypeError("can't write empty bucket")
+        f.write(bc_magic)
+        pickle.dump(self.checksum, f, 2)
+        marshal.dump(self.code, f)
+
+    def bytecode_from_string(self, string: bytes) -> None:
+        """Load bytecode from bytes."""
+        self.load_bytecode(BytesIO(string))
+
+    def bytecode_to_string(self) -> bytes:
+        """Return the bytecode as bytes."""
+        out = BytesIO()
+        self.write_bytecode(out)
+        return out.getvalue()
+
+
+class BytecodeCache:
+    """To implement your own bytecode cache you have to subclass this class
+    and override :meth:`load_bytecode` and :meth:`dump_bytecode`.  Both of
+    these methods are passed a :class:`~jinja2.bccache.Bucket`.
+
+    A very basic bytecode cache that saves the bytecode on the file system::
+
+        from os import path
+
+        class MyCache(BytecodeCache):
+
+            def __init__(self, directory):
+                self.directory = directory
+
+            def load_bytecode(self, bucket):
+                filename = path.join(self.directory, bucket.key)
+                if path.exists(filename):
+                    with open(filename, 'rb') as f:
+                        bucket.load_bytecode(f)
+
+            def dump_bytecode(self, bucket):
+                filename = path.join(self.directory, bucket.key)
+                with open(filename, 'wb') as f:
+                    bucket.write_bytecode(f)
+
+    A more advanced version of a filesystem based bytecode cache is part of
+    Jinja.
+    """
+
+    def load_bytecode(self, bucket: Bucket) -> None:
+        """Subclasses have to override this method to load bytecode into a
+        bucket.  If they are not able to find code in the cache for the
+        bucket, it must not do anything.
+        """
+        raise NotImplementedError()
+
+    def dump_bytecode(self, bucket: Bucket) -> None:
+        """Subclasses have to override this method to write the bytecode
+        from a bucket back to the cache.  If it unable to do so it must not
+        fail silently but raise an exception.
+        """
+        raise NotImplementedError()
+
+    def clear(self) -> None:
+        """Clears the cache.  This method is not used by Jinja but should be
+        implemented to allow applications to clear the bytecode cache used
+        by a particular environment.
+        """
+
+    def get_cache_key(
+        self, name: str, filename: t.Optional[t.Union[str]] = None
+    ) -> str:
+        """Returns the unique hash key for this template name."""
+        hash = sha1(name.encode("utf-8"))
+
+        if filename is not None:
+            hash.update(f"|{filename}".encode())
+
+        return hash.hexdigest()
+
+    def get_source_checksum(self, source: str) -> str:
+        """Returns a checksum for the source."""
+        return sha1(source.encode("utf-8")).hexdigest()
+
+    def get_bucket(
+        self,
+        environment: "Environment",
+        name: str,
+        filename: t.Optional[str],
+        source: str,
+    ) -> Bucket:
+        """Return a cache bucket for the given template.  All arguments are
+        mandatory but filename may be `None`.
+        """
+        key = self.get_cache_key(name, filename)
+        checksum = self.get_source_checksum(source)
+        bucket = Bucket(environment, key, checksum)
+        self.load_bytecode(bucket)
+        return bucket
+
+    def set_bucket(self, bucket: Bucket) -> None:
+        """Put the bucket into the cache."""
+        self.dump_bytecode(bucket)
+
+
+class FileSystemBytecodeCache(BytecodeCache):
+    """A bytecode cache that stores bytecode on the filesystem.  It accepts
+    two arguments: The directory where the cache items are stored and a
+    pattern string that is used to build the filename.
+
+    If no directory is specified a default cache directory is selected.  On
+    Windows the user's temp directory is used, on UNIX systems a directory
+    is created for the user in the system temp directory.
+
+    The pattern can be used to have multiple separate caches operate on the
+    same directory.  The default pattern is ``'__jinja2_%s.cache'``.  ``%s``
+    is replaced with the cache key.
+
+    >>> bcc = FileSystemBytecodeCache('/tmp/jinja_cache', '%s.cache')
+
+    This bytecode cache supports clearing of the cache using the clear method.
+    """
+
+    def __init__(
+        self, directory: t.Optional[str] = None, pattern: str = "__jinja2_%s.cache"
+    ) -> None:
+        if directory is None:
+            directory = self._get_default_cache_dir()
+        self.directory = directory
+        self.pattern = pattern
+
+    def _get_default_cache_dir(self) -> str:
+        def _unsafe_dir() -> "te.NoReturn":
+            raise RuntimeError(
+                "Cannot determine safe temp directory.  You "
+                "need to explicitly provide one."
+            )
+
+        tmpdir = tempfile.gettempdir()
+
+        # On windows the temporary directory is used specific unless
+        # explicitly forced otherwise.  We can just use that.
+        if os.name == "nt":
+            return tmpdir
+        if not hasattr(os, "getuid"):
+            _unsafe_dir()
+
+        dirname = f"_jinja2-cache-{os.getuid()}"
+        actual_dir = os.path.join(tmpdir, dirname)
+
+        try:
+            os.mkdir(actual_dir, stat.S_IRWXU)
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+        try:
+            os.chmod(actual_dir, stat.S_IRWXU)
+            actual_dir_stat = os.lstat(actual_dir)
+            if (
+                actual_dir_stat.st_uid != os.getuid()
+                or not stat.S_ISDIR(actual_dir_stat.st_mode)
+                or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU
+            ):
+                _unsafe_dir()
+        except OSError as e:
+            if e.errno != errno.EEXIST:
+                raise
+
+        actual_dir_stat = os.lstat(actual_dir)
+        if (
+            actual_dir_stat.st_uid != os.getuid()
+            or not stat.S_ISDIR(actual_dir_stat.st_mode)
+            or stat.S_IMODE(actual_dir_stat.st_mode) != stat.S_IRWXU
+        ):
+            _unsafe_dir()
+
+        return actual_dir
+
+    def _get_cache_filename(self, bucket: Bucket) -> str:
+        return os.path.join(self.directory, self.pattern % (bucket.key,))
+
+    def load_bytecode(self, bucket: Bucket) -> None:
+        filename = self._get_cache_filename(bucket)
+
+        # Don't test for existence before opening the file, since the
+        # file could disappear after the test before the open.
+        try:
+            f = open(filename, "rb")
+        except (FileNotFoundError, IsADirectoryError, PermissionError):
+            # PermissionError can occur on Windows when an operation is
+            # in progress, such as calling clear().
+            return
+
+        with f:
+            bucket.load_bytecode(f)
+
+    def dump_bytecode(self, bucket: Bucket) -> None:
+        # Write to a temporary file, then rename to the real name after
+        # writing. This avoids another process reading the file before
+        # it is fully written.
+        name = self._get_cache_filename(bucket)
+        f = tempfile.NamedTemporaryFile(
+            mode="wb",
+            dir=os.path.dirname(name),
+            prefix=os.path.basename(name),
+            suffix=".tmp",
+            delete=False,
+        )
+
+        def remove_silent() -> None:
+            try:
+                os.remove(f.name)
+            except OSError:
+                # Another process may have called clear(). On Windows,
+                # another program may be holding the file open.
+                pass
+
+        try:
+            with f:
+                bucket.write_bytecode(f)
+        except BaseException:
+            remove_silent()
+            raise
+
+        try:
+            os.replace(f.name, name)
+        except OSError:
+            # Another process may have called clear(). On Windows,
+            # another program may be holding the file open.
+            remove_silent()
+        except BaseException:
+            remove_silent()
+            raise
+
+    def clear(self) -> None:
+        # imported lazily here because google app-engine doesn't support
+        # write access on the file system and the function does not exist
+        # normally.
+        from os import remove
+
+        files = fnmatch.filter(os.listdir(self.directory), self.pattern % ("*",))
+        for filename in files:
+            try:
+                remove(os.path.join(self.directory, filename))
+            except OSError:
+                pass
+
+
+class MemcachedBytecodeCache(BytecodeCache):
+    """This class implements a bytecode cache that uses a memcache cache for
+    storing the information.  It does not enforce a specific memcache library
+    (tummy's memcache or cmemcache) but will accept any class that provides
+    the minimal interface required.
+
+    Libraries compatible with this class:
+
+    -   `cachelib <https://github.com/pallets/cachelib>`_
+    -   `python-memcached <https://pypi.org/project/python-memcached/>`_
+
+    (Unfortunately the django cache interface is not compatible because it
+    does not support storing binary data, only text. You can however pass
+    the underlying cache client to the bytecode cache which is available
+    as `django.core.cache.cache._client`.)
+
+    The minimal interface for the client passed to the constructor is this:
+
+    .. class:: MinimalClientInterface
+
+        .. method:: set(key, value[, timeout])
+
+            Stores the bytecode in the cache.  `value` is a string and
+            `timeout` the timeout of the key.  If timeout is not provided
+            a default timeout or no timeout should be assumed, if it's
+            provided it's an integer with the number of seconds the cache
+            item should exist.
+
+        .. method:: get(key)
+
+            Returns the value for the cache key.  If the item does not
+            exist in the cache the return value must be `None`.
+
+    The other arguments to the constructor are the prefix for all keys that
+    is added before the actual cache key and the timeout for the bytecode in
+    the cache system.  We recommend a high (or no) timeout.
+
+    This bytecode cache does not support clearing of used items in the cache.
+    The clear method is a no-operation function.
+
+    .. versionadded:: 2.7
+       Added support for ignoring memcache errors through the
+       `ignore_memcache_errors` parameter.
+    """
+
+    def __init__(
+        self,
+        client: "_MemcachedClient",
+        prefix: str = "jinja2/bytecode/",
+        timeout: t.Optional[int] = None,
+        ignore_memcache_errors: bool = True,
+    ):
+        self.client = client
+        self.prefix = prefix
+        self.timeout = timeout
+        self.ignore_memcache_errors = ignore_memcache_errors
+
+    def load_bytecode(self, bucket: Bucket) -> None:
+        try:
+            code = self.client.get(self.prefix + bucket.key)
+        except Exception:
+            if not self.ignore_memcache_errors:
+                raise
+        else:
+            bucket.bytecode_from_string(code)
+
+    def dump_bytecode(self, bucket: Bucket) -> None:
+        key = self.prefix + bucket.key
+        value = bucket.bytecode_to_string()
+
+        try:
+            if self.timeout is not None:
+                self.client.set(key, value, self.timeout)
+            else:
+                self.client.set(key, value)
+        except Exception:
+            if not self.ignore_memcache_errors:
+                raise
diff --git a/venv/lib/python3.9/site-packages/jinja2/compiler.py b/venv/lib/python3.9/site-packages/jinja2/compiler.py
new file mode 100644
index 0000000..3458095
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/compiler.py
@@ -0,0 +1,1957 @@
+"""Compiles nodes from the parser into Python code."""
+import typing as t
+from contextlib import contextmanager
+from functools import update_wrapper
+from io import StringIO
+from itertools import chain
+from keyword import iskeyword as is_python_keyword
+
+from markupsafe import escape
+from markupsafe import Markup
+
+from . import nodes
+from .exceptions import TemplateAssertionError
+from .idtracking import Symbols
+from .idtracking import VAR_LOAD_ALIAS
+from .idtracking import VAR_LOAD_PARAMETER
+from .idtracking import VAR_LOAD_RESOLVE
+from .idtracking import VAR_LOAD_UNDEFINED
+from .nodes import EvalContext
+from .optimizer import Optimizer
+from .utils import _PassArg
+from .utils import concat
+from .visitor import NodeVisitor
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+operators = {
+    "eq": "==",
+    "ne": "!=",
+    "gt": ">",
+    "gteq": ">=",
+    "lt": "<",
+    "lteq": "<=",
+    "in": "in",
+    "notin": "not in",
+}
+
+
+def optimizeconst(f: F) -> F:
+    def new_func(
+        self: "CodeGenerator", node: nodes.Expr, frame: "Frame", **kwargs: t.Any
+    ) -> t.Any:
+        # Only optimize if the frame is not volatile
+        if self.optimizer is not None and not frame.eval_ctx.volatile:
+            new_node = self.optimizer.visit(node, frame.eval_ctx)
+
+            if new_node != node:
+                return self.visit(new_node, frame)
+
+        return f(self, node, frame, **kwargs)
+
+    return update_wrapper(t.cast(F, new_func), f)
+
+
+def _make_binop(op: str) -> t.Callable[["CodeGenerator", nodes.BinExpr, "Frame"], None]:
+    @optimizeconst
+    def visitor(self: "CodeGenerator", node: nodes.BinExpr, frame: Frame) -> None:
+        if (
+            self.environment.sandboxed
+            and op in self.environment.intercepted_binops  # type: ignore
+        ):
+            self.write(f"environment.call_binop(context, {op!r}, ")
+            self.visit(node.left, frame)
+            self.write(", ")
+            self.visit(node.right, frame)
+        else:
+            self.write("(")
+            self.visit(node.left, frame)
+            self.write(f" {op} ")
+            self.visit(node.right, frame)
+
+        self.write(")")
+
+    return visitor
+
+
+def _make_unop(
+    op: str,
+) -> t.Callable[["CodeGenerator", nodes.UnaryExpr, "Frame"], None]:
+    @optimizeconst
+    def visitor(self: "CodeGenerator", node: nodes.UnaryExpr, frame: Frame) -> None:
+        if (
+            self.environment.sandboxed
+            and op in self.environment.intercepted_unops  # type: ignore
+        ):
+            self.write(f"environment.call_unop(context, {op!r}, ")
+            self.visit(node.node, frame)
+        else:
+            self.write("(" + op)
+            self.visit(node.node, frame)
+
+        self.write(")")
+
+    return visitor
+
+
+def generate(
+    node: nodes.Template,
+    environment: "Environment",
+    name: t.Optional[str],
+    filename: t.Optional[str],
+    stream: t.Optional[t.TextIO] = None,
+    defer_init: bool = False,
+    optimized: bool = True,
+) -> t.Optional[str]:
+    """Generate the python source for a node tree."""
+    if not isinstance(node, nodes.Template):
+        raise TypeError("Can't compile non template nodes")
+
+    generator = environment.code_generator_class(
+        environment, name, filename, stream, defer_init, optimized
+    )
+    generator.visit(node)
+
+    if stream is None:
+        return generator.stream.getvalue()  # type: ignore
+
+    return None
+
+
+def has_safe_repr(value: t.Any) -> bool:
+    """Does the node have a safe representation?"""
+    if value is None or value is NotImplemented or value is Ellipsis:
+        return True
+
+    if type(value) in {bool, int, float, complex, range, str, Markup}:
+        return True
+
+    if type(value) in {tuple, list, set, frozenset}:
+        return all(has_safe_repr(v) for v in value)
+
+    if type(value) is dict:
+        return all(has_safe_repr(k) and has_safe_repr(v) for k, v in value.items())
+
+    return False
+
+
+def find_undeclared(
+    nodes: t.Iterable[nodes.Node], names: t.Iterable[str]
+) -> t.Set[str]:
+    """Check if the names passed are accessed undeclared.  The return value
+    is a set of all the undeclared names from the sequence of names found.
+    """
+    visitor = UndeclaredNameVisitor(names)
+    try:
+        for node in nodes:
+            visitor.visit(node)
+    except VisitorExit:
+        pass
+    return visitor.undeclared
+
+
+class MacroRef:
+    def __init__(self, node: t.Union[nodes.Macro, nodes.CallBlock]) -> None:
+        self.node = node
+        self.accesses_caller = False
+        self.accesses_kwargs = False
+        self.accesses_varargs = False
+
+
+class Frame:
+    """Holds compile time information for us."""
+
+    def __init__(
+        self,
+        eval_ctx: EvalContext,
+        parent: t.Optional["Frame"] = None,
+        level: t.Optional[int] = None,
+    ) -> None:
+        self.eval_ctx = eval_ctx
+
+        # the parent of this frame
+        self.parent = parent
+
+        if parent is None:
+            self.symbols = Symbols(level=level)
+
+            # in some dynamic inheritance situations the compiler needs to add
+            # write tests around output statements.
+            self.require_output_check = False
+
+            # inside some tags we are using a buffer rather than yield statements.
+            # this for example affects {% filter %} or {% macro %}.  If a frame
+            # is buffered this variable points to the name of the list used as
+            # buffer.
+            self.buffer: t.Optional[str] = None
+
+            # the name of the block we're in, otherwise None.
+            self.block: t.Optional[str] = None
+
+        else:
+            self.symbols = Symbols(parent.symbols, level=level)
+            self.require_output_check = parent.require_output_check
+            self.buffer = parent.buffer
+            self.block = parent.block
+
+        # a toplevel frame is the root + soft frames such as if conditions.
+        self.toplevel = False
+
+        # the root frame is basically just the outermost frame, so no if
+        # conditions.  This information is used to optimize inheritance
+        # situations.
+        self.rootlevel = False
+
+        # variables set inside of loops and blocks should not affect outer frames,
+        # but they still needs to be kept track of as part of the active context.
+        self.loop_frame = False
+        self.block_frame = False
+
+        # track whether the frame is being used in an if-statement or conditional
+        # expression as it determines which errors should be raised during runtime
+        # or compile time.
+        self.soft_frame = False
+
+    def copy(self) -> "Frame":
+        """Create a copy of the current one."""
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.symbols = self.symbols.copy()
+        return rv
+
+    def inner(self, isolated: bool = False) -> "Frame":
+        """Return an inner frame."""
+        if isolated:
+            return Frame(self.eval_ctx, level=self.symbols.level + 1)
+        return Frame(self.eval_ctx, self)
+
+    def soft(self) -> "Frame":
+        """Return a soft frame.  A soft frame may not be modified as
+        standalone thing as it shares the resources with the frame it
+        was created of, but it's not a rootlevel frame any longer.
+
+        This is only used to implement if-statements and conditional
+        expressions.
+        """
+        rv = self.copy()
+        rv.rootlevel = False
+        rv.soft_frame = True
+        return rv
+
+    __copy__ = copy
+
+
+class VisitorExit(RuntimeError):
+    """Exception used by the `UndeclaredNameVisitor` to signal a stop."""
+
+
+class DependencyFinderVisitor(NodeVisitor):
+    """A visitor that collects filter and test calls."""
+
+    def __init__(self) -> None:
+        self.filters: t.Set[str] = set()
+        self.tests: t.Set[str] = set()
+
+    def visit_Filter(self, node: nodes.Filter) -> None:
+        self.generic_visit(node)
+        self.filters.add(node.name)
+
+    def visit_Test(self, node: nodes.Test) -> None:
+        self.generic_visit(node)
+        self.tests.add(node.name)
+
+    def visit_Block(self, node: nodes.Block) -> None:
+        """Stop visiting at blocks."""
+
+
+class UndeclaredNameVisitor(NodeVisitor):
+    """A visitor that checks if a name is accessed without being
+    declared.  This is different from the frame visitor as it will
+    not stop at closure frames.
+    """
+
+    def __init__(self, names: t.Iterable[str]) -> None:
+        self.names = set(names)
+        self.undeclared: t.Set[str] = set()
+
+    def visit_Name(self, node: nodes.Name) -> None:
+        if node.ctx == "load" and node.name in self.names:
+            self.undeclared.add(node.name)
+            if self.undeclared == self.names:
+                raise VisitorExit()
+        else:
+            self.names.discard(node.name)
+
+    def visit_Block(self, node: nodes.Block) -> None:
+        """Stop visiting a blocks."""
+
+
+class CompilerExit(Exception):
+    """Raised if the compiler encountered a situation where it just
+    doesn't make sense to further process the code.  Any block that
+    raises such an exception is not further processed.
+    """
+
+
+class CodeGenerator(NodeVisitor):
+    def __init__(
+        self,
+        environment: "Environment",
+        name: t.Optional[str],
+        filename: t.Optional[str],
+        stream: t.Optional[t.TextIO] = None,
+        defer_init: bool = False,
+        optimized: bool = True,
+    ) -> None:
+        if stream is None:
+            stream = StringIO()
+        self.environment = environment
+        self.name = name
+        self.filename = filename
+        self.stream = stream
+        self.created_block_context = False
+        self.defer_init = defer_init
+        self.optimizer: t.Optional[Optimizer] = None
+
+        if optimized:
+            self.optimizer = Optimizer(environment)
+
+        # aliases for imports
+        self.import_aliases: t.Dict[str, str] = {}
+
+        # a registry for all blocks.  Because blocks are moved out
+        # into the global python scope they are registered here
+        self.blocks: t.Dict[str, nodes.Block] = {}
+
+        # the number of extends statements so far
+        self.extends_so_far = 0
+
+        # some templates have a rootlevel extends.  In this case we
+        # can safely assume that we're a child template and do some
+        # more optimizations.
+        self.has_known_extends = False
+
+        # the current line number
+        self.code_lineno = 1
+
+        # registry of all filters and tests (global, not block local)
+        self.tests: t.Dict[str, str] = {}
+        self.filters: t.Dict[str, str] = {}
+
+        # the debug information
+        self.debug_info: t.List[t.Tuple[int, int]] = []
+        self._write_debug_info: t.Optional[int] = None
+
+        # the number of new lines before the next write()
+        self._new_lines = 0
+
+        # the line number of the last written statement
+        self._last_line = 0
+
+        # true if nothing was written so far.
+        self._first_write = True
+
+        # used by the `temporary_identifier` method to get new
+        # unique, temporary identifier
+        self._last_identifier = 0
+
+        # the current indentation
+        self._indentation = 0
+
+        # Tracks toplevel assignments
+        self._assign_stack: t.List[t.Set[str]] = []
+
+        # Tracks parameter definition blocks
+        self._param_def_block: t.List[t.Set[str]] = []
+
+        # Tracks the current context.
+        self._context_reference_stack = ["context"]
+
+    @property
+    def optimized(self) -> bool:
+        return self.optimizer is not None
+
+    # -- Various compilation helpers
+
+    def fail(self, msg: str, lineno: int) -> "te.NoReturn":
+        """Fail with a :exc:`TemplateAssertionError`."""
+        raise TemplateAssertionError(msg, lineno, self.name, self.filename)
+
+    def temporary_identifier(self) -> str:
+        """Get a new unique identifier."""
+        self._last_identifier += 1
+        return f"t_{self._last_identifier}"
+
+    def buffer(self, frame: Frame) -> None:
+        """Enable buffering for the frame from that point onwards."""
+        frame.buffer = self.temporary_identifier()
+        self.writeline(f"{frame.buffer} = []")
+
+    def return_buffer_contents(
+        self, frame: Frame, force_unescaped: bool = False
+    ) -> None:
+        """Return the buffer contents of the frame."""
+        if not force_unescaped:
+            if frame.eval_ctx.volatile:
+                self.writeline("if context.eval_ctx.autoescape:")
+                self.indent()
+                self.writeline(f"return Markup(concat({frame.buffer}))")
+                self.outdent()
+                self.writeline("else:")
+                self.indent()
+                self.writeline(f"return concat({frame.buffer})")
+                self.outdent()
+                return
+            elif frame.eval_ctx.autoescape:
+                self.writeline(f"return Markup(concat({frame.buffer}))")
+                return
+        self.writeline(f"return concat({frame.buffer})")
+
+    def indent(self) -> None:
+        """Indent by one."""
+        self._indentation += 1
+
+    def outdent(self, step: int = 1) -> None:
+        """Outdent by step."""
+        self._indentation -= step
+
+    def start_write(self, frame: Frame, node: t.Optional[nodes.Node] = None) -> None:
+        """Yield or write into the frame buffer."""
+        if frame.buffer is None:
+            self.writeline("yield ", node)
+        else:
+            self.writeline(f"{frame.buffer}.append(", node)
+
+    def end_write(self, frame: Frame) -> None:
+        """End the writing process started by `start_write`."""
+        if frame.buffer is not None:
+            self.write(")")
+
+    def simple_write(
+        self, s: str, frame: Frame, node: t.Optional[nodes.Node] = None
+    ) -> None:
+        """Simple shortcut for start_write + write + end_write."""
+        self.start_write(frame, node)
+        self.write(s)
+        self.end_write(frame)
+
+    def blockvisit(self, nodes: t.Iterable[nodes.Node], frame: Frame) -> None:
+        """Visit a list of nodes as block in a frame.  If the current frame
+        is no buffer a dummy ``if 0: yield None`` is written automatically.
+        """
+        try:
+            self.writeline("pass")
+            for node in nodes:
+                self.visit(node, frame)
+        except CompilerExit:
+            pass
+
+    def write(self, x: str) -> None:
+        """Write a string into the output stream."""
+        if self._new_lines:
+            if not self._first_write:
+                self.stream.write("\n" * self._new_lines)
+                self.code_lineno += self._new_lines
+                if self._write_debug_info is not None:
+                    self.debug_info.append((self._write_debug_info, self.code_lineno))
+                    self._write_debug_info = None
+            self._first_write = False
+            self.stream.write("    " * self._indentation)
+            self._new_lines = 0
+        self.stream.write(x)
+
+    def writeline(
+        self, x: str, node: t.Optional[nodes.Node] = None, extra: int = 0
+    ) -> None:
+        """Combination of newline and write."""
+        self.newline(node, extra)
+        self.write(x)
+
+    def newline(self, node: t.Optional[nodes.Node] = None, extra: int = 0) -> None:
+        """Add one or more newlines before the next write."""
+        self._new_lines = max(self._new_lines, 1 + extra)
+        if node is not None and node.lineno != self._last_line:
+            self._write_debug_info = node.lineno
+            self._last_line = node.lineno
+
+    def signature(
+        self,
+        node: t.Union[nodes.Call, nodes.Filter, nodes.Test],
+        frame: Frame,
+        extra_kwargs: t.Optional[t.Mapping[str, t.Any]] = None,
+    ) -> None:
+        """Writes a function call to the stream for the current node.
+        A leading comma is added automatically.  The extra keyword
+        arguments may not include python keywords otherwise a syntax
+        error could occur.  The extra keyword arguments should be given
+        as python dict.
+        """
+        # if any of the given keyword arguments is a python keyword
+        # we have to make sure that no invalid call is created.
+        kwarg_workaround = any(
+            is_python_keyword(t.cast(str, k))
+            for k in chain((x.key for x in node.kwargs), extra_kwargs or ())
+        )
+
+        for arg in node.args:
+            self.write(", ")
+            self.visit(arg, frame)
+
+        if not kwarg_workaround:
+            for kwarg in node.kwargs:
+                self.write(", ")
+                self.visit(kwarg, frame)
+            if extra_kwargs is not None:
+                for key, value in extra_kwargs.items():
+                    self.write(f", {key}={value}")
+        if node.dyn_args:
+            self.write(", *")
+            self.visit(node.dyn_args, frame)
+
+        if kwarg_workaround:
+            if node.dyn_kwargs is not None:
+                self.write(", **dict({")
+            else:
+                self.write(", **{")
+            for kwarg in node.kwargs:
+                self.write(f"{kwarg.key!r}: ")
+                self.visit(kwarg.value, frame)
+                self.write(", ")
+            if extra_kwargs is not None:
+                for key, value in extra_kwargs.items():
+                    self.write(f"{key!r}: {value}, ")
+            if node.dyn_kwargs is not None:
+                self.write("}, **")
+                self.visit(node.dyn_kwargs, frame)
+                self.write(")")
+            else:
+                self.write("}")
+
+        elif node.dyn_kwargs is not None:
+            self.write(", **")
+            self.visit(node.dyn_kwargs, frame)
+
+    def pull_dependencies(self, nodes: t.Iterable[nodes.Node]) -> None:
+        """Find all filter and test names used in the template and
+        assign them to variables in the compiled namespace. Checking
+        that the names are registered with the environment is done when
+        compiling the Filter and Test nodes. If the node is in an If or
+        CondExpr node, the check is done at runtime instead.
+
+        .. versionchanged:: 3.0
+            Filters and tests in If and CondExpr nodes are checked at
+            runtime instead of compile time.
+        """
+        visitor = DependencyFinderVisitor()
+
+        for node in nodes:
+            visitor.visit(node)
+
+        for id_map, names, dependency in (self.filters, visitor.filters, "filters"), (
+            self.tests,
+            visitor.tests,
+            "tests",
+        ):
+            for name in sorted(names):
+                if name not in id_map:
+                    id_map[name] = self.temporary_identifier()
+
+                # add check during runtime that dependencies used inside of executed
+                # blocks are defined, as this step may be skipped during compile time
+                self.writeline("try:")
+                self.indent()
+                self.writeline(f"{id_map[name]} = environment.{dependency}[{name!r}]")
+                self.outdent()
+                self.writeline("except KeyError:")
+                self.indent()
+                self.writeline("@internalcode")
+                self.writeline(f"def {id_map[name]}(*unused):")
+                self.indent()
+                self.writeline(
+                    f'raise TemplateRuntimeError("No {dependency[:-1]}'
+                    f' named {name!r} found.")'
+                )
+                self.outdent()
+                self.outdent()
+
+    def enter_frame(self, frame: Frame) -> None:
+        undefs = []
+        for target, (action, param) in frame.symbols.loads.items():
+            if action == VAR_LOAD_PARAMETER:
+                pass
+            elif action == VAR_LOAD_RESOLVE:
+                self.writeline(f"{target} = {self.get_resolve_func()}({param!r})")
+            elif action == VAR_LOAD_ALIAS:
+                self.writeline(f"{target} = {param}")
+            elif action == VAR_LOAD_UNDEFINED:
+                undefs.append(target)
+            else:
+                raise NotImplementedError("unknown load instruction")
+        if undefs:
+            self.writeline(f"{' = '.join(undefs)} = missing")
+
+    def leave_frame(self, frame: Frame, with_python_scope: bool = False) -> None:
+        if not with_python_scope:
+            undefs = []
+            for target in frame.symbols.loads:
+                undefs.append(target)
+            if undefs:
+                self.writeline(f"{' = '.join(undefs)} = missing")
+
+    def choose_async(self, async_value: str = "async ", sync_value: str = "") -> str:
+        return async_value if self.environment.is_async else sync_value
+
+    def func(self, name: str) -> str:
+        return f"{self.choose_async()}def {name}"
+
+    def macro_body(
+        self, node: t.Union[nodes.Macro, nodes.CallBlock], frame: Frame
+    ) -> t.Tuple[Frame, MacroRef]:
+        """Dump the function def of a macro or call block."""
+        frame = frame.inner()
+        frame.symbols.analyze_node(node)
+        macro_ref = MacroRef(node)
+
+        explicit_caller = None
+        skip_special_params = set()
+        args = []
+
+        for idx, arg in enumerate(node.args):
+            if arg.name == "caller":
+                explicit_caller = idx
+            if arg.name in ("kwargs", "varargs"):
+                skip_special_params.add(arg.name)
+            args.append(frame.symbols.ref(arg.name))
+
+        undeclared = find_undeclared(node.body, ("caller", "kwargs", "varargs"))
+
+        if "caller" in undeclared:
+            # In older Jinja versions there was a bug that allowed caller
+            # to retain the special behavior even if it was mentioned in
+            # the argument list.  However thankfully this was only really
+            # working if it was the last argument.  So we are explicitly
+            # checking this now and error out if it is anywhere else in
+            # the argument list.
+            if explicit_caller is not None:
+                try:
+                    node.defaults[explicit_caller - len(node.args)]
+                except IndexError:
+                    self.fail(
+                        "When defining macros or call blocks the "
+                        'special "caller" argument must be omitted '
+                        "or be given a default.",
+                        node.lineno,
+                    )
+            else:
+                args.append(frame.symbols.declare_parameter("caller"))
+            macro_ref.accesses_caller = True
+        if "kwargs" in undeclared and "kwargs" not in skip_special_params:
+            args.append(frame.symbols.declare_parameter("kwargs"))
+            macro_ref.accesses_kwargs = True
+        if "varargs" in undeclared and "varargs" not in skip_special_params:
+            args.append(frame.symbols.declare_parameter("varargs"))
+            macro_ref.accesses_varargs = True
+
+        # macros are delayed, they never require output checks
+        frame.require_output_check = False
+        frame.symbols.analyze_node(node)
+        self.writeline(f"{self.func('macro')}({', '.join(args)}):", node)
+        self.indent()
+
+        self.buffer(frame)
+        self.enter_frame(frame)
+
+        self.push_parameter_definitions(frame)
+        for idx, arg in enumerate(node.args):
+            ref = frame.symbols.ref(arg.name)
+            self.writeline(f"if {ref} is missing:")
+            self.indent()
+            try:
+                default = node.defaults[idx - len(node.args)]
+            except IndexError:
+                self.writeline(
+                    f'{ref} = undefined("parameter {arg.name!r} was not provided",'
+                    f" name={arg.name!r})"
+                )
+            else:
+                self.writeline(f"{ref} = ")
+                self.visit(default, frame)
+            self.mark_parameter_stored(ref)
+            self.outdent()
+        self.pop_parameter_definitions()
+
+        self.blockvisit(node.body, frame)
+        self.return_buffer_contents(frame, force_unescaped=True)
+        self.leave_frame(frame, with_python_scope=True)
+        self.outdent()
+
+        return frame, macro_ref
+
+    def macro_def(self, macro_ref: MacroRef, frame: Frame) -> None:
+        """Dump the macro definition for the def created by macro_body."""
+        arg_tuple = ", ".join(repr(x.name) for x in macro_ref.node.args)
+        name = getattr(macro_ref.node, "name", None)
+        if len(macro_ref.node.args) == 1:
+            arg_tuple += ","
+        self.write(
+            f"Macro(environment, macro, {name!r}, ({arg_tuple}),"
+            f" {macro_ref.accesses_kwargs!r}, {macro_ref.accesses_varargs!r},"
+            f" {macro_ref.accesses_caller!r}, context.eval_ctx.autoescape)"
+        )
+
+    def position(self, node: nodes.Node) -> str:
+        """Return a human readable position for the node."""
+        rv = f"line {node.lineno}"
+        if self.name is not None:
+            rv = f"{rv} in {self.name!r}"
+        return rv
+
+    def dump_local_context(self, frame: Frame) -> str:
+        items_kv = ", ".join(
+            f"{name!r}: {target}"
+            for name, target in frame.symbols.dump_stores().items()
+        )
+        return f"{{{items_kv}}}"
+
+    def write_commons(self) -> None:
+        """Writes a common preamble that is used by root and block functions.
+        Primarily this sets up common local helpers and enforces a generator
+        through a dead branch.
+        """
+        self.writeline("resolve = context.resolve_or_missing")
+        self.writeline("undefined = environment.undefined")
+        self.writeline("concat = environment.concat")
+        # always use the standard Undefined class for the implicit else of
+        # conditional expressions
+        self.writeline("cond_expr_undefined = Undefined")
+        self.writeline("if 0: yield None")
+
+    def push_parameter_definitions(self, frame: Frame) -> None:
+        """Pushes all parameter targets from the given frame into a local
+        stack that permits tracking of yet to be assigned parameters.  In
+        particular this enables the optimization from `visit_Name` to skip
+        undefined expressions for parameters in macros as macros can reference
+        otherwise unbound parameters.
+        """
+        self._param_def_block.append(frame.symbols.dump_param_targets())
+
+    def pop_parameter_definitions(self) -> None:
+        """Pops the current parameter definitions set."""
+        self._param_def_block.pop()
+
+    def mark_parameter_stored(self, target: str) -> None:
+        """Marks a parameter in the current parameter definitions as stored.
+        This will skip the enforced undefined checks.
+        """
+        if self._param_def_block:
+            self._param_def_block[-1].discard(target)
+
+    def push_context_reference(self, target: str) -> None:
+        self._context_reference_stack.append(target)
+
+    def pop_context_reference(self) -> None:
+        self._context_reference_stack.pop()
+
+    def get_context_ref(self) -> str:
+        return self._context_reference_stack[-1]
+
+    def get_resolve_func(self) -> str:
+        target = self._context_reference_stack[-1]
+        if target == "context":
+            return "resolve"
+        return f"{target}.resolve"
+
+    def derive_context(self, frame: Frame) -> str:
+        return f"{self.get_context_ref()}.derived({self.dump_local_context(frame)})"
+
+    def parameter_is_undeclared(self, target: str) -> bool:
+        """Checks if a given target is an undeclared parameter."""
+        if not self._param_def_block:
+            return False
+        return target in self._param_def_block[-1]
+
+    def push_assign_tracking(self) -> None:
+        """Pushes a new layer for assignment tracking."""
+        self._assign_stack.append(set())
+
+    def pop_assign_tracking(self, frame: Frame) -> None:
+        """Pops the topmost level for assignment tracking and updates the
+        context variables if necessary.
+        """
+        vars = self._assign_stack.pop()
+        if (
+            not frame.block_frame
+            and not frame.loop_frame
+            and not frame.toplevel
+            or not vars
+        ):
+            return
+        public_names = [x for x in vars if x[:1] != "_"]
+        if len(vars) == 1:
+            name = next(iter(vars))
+            ref = frame.symbols.ref(name)
+            if frame.loop_frame:
+                self.writeline(f"_loop_vars[{name!r}] = {ref}")
+                return
+            if frame.block_frame:
+                self.writeline(f"_block_vars[{name!r}] = {ref}")
+                return
+            self.writeline(f"context.vars[{name!r}] = {ref}")
+        else:
+            if frame.loop_frame:
+                self.writeline("_loop_vars.update({")
+            elif frame.block_frame:
+                self.writeline("_block_vars.update({")
+            else:
+                self.writeline("context.vars.update({")
+            for idx, name in enumerate(vars):
+                if idx:
+                    self.write(", ")
+                ref = frame.symbols.ref(name)
+                self.write(f"{name!r}: {ref}")
+            self.write("})")
+        if not frame.block_frame and not frame.loop_frame and public_names:
+            if len(public_names) == 1:
+                self.writeline(f"context.exported_vars.add({public_names[0]!r})")
+            else:
+                names_str = ", ".join(map(repr, public_names))
+                self.writeline(f"context.exported_vars.update(({names_str}))")
+
+    # -- Statement Visitors
+
+    def visit_Template(
+        self, node: nodes.Template, frame: t.Optional[Frame] = None
+    ) -> None:
+        assert frame is None, "no root frame allowed"
+        eval_ctx = EvalContext(self.environment, self.name)
+
+        from .runtime import exported, async_exported
+
+        if self.environment.is_async:
+            exported_names = sorted(exported + async_exported)
+        else:
+            exported_names = sorted(exported)
+
+        self.writeline("from jinja2.runtime import " + ", ".join(exported_names))
+
+        # if we want a deferred initialization we cannot move the
+        # environment into a local name
+        envenv = "" if self.defer_init else ", environment=environment"
+
+        # do we have an extends tag at all?  If not, we can save some
+        # overhead by just not processing any inheritance code.
+        have_extends = node.find(nodes.Extends) is not None
+
+        # find all blocks
+        for block in node.find_all(nodes.Block):
+            if block.name in self.blocks:
+                self.fail(f"block {block.name!r} defined twice", block.lineno)
+            self.blocks[block.name] = block
+
+        # find all imports and import them
+        for import_ in node.find_all(nodes.ImportedName):
+            if import_.importname not in self.import_aliases:
+                imp = import_.importname
+                self.import_aliases[imp] = alias = self.temporary_identifier()
+                if "." in imp:
+                    module, obj = imp.rsplit(".", 1)
+                    self.writeline(f"from {module} import {obj} as {alias}")
+                else:
+                    self.writeline(f"import {imp} as {alias}")
+
+        # add the load name
+        self.writeline(f"name = {self.name!r}")
+
+        # generate the root render function.
+        self.writeline(
+            f"{self.func('root')}(context, missing=missing{envenv}):", extra=1
+        )
+        self.indent()
+        self.write_commons()
+
+        # process the root
+        frame = Frame(eval_ctx)
+        if "self" in find_undeclared(node.body, ("self",)):
+            ref = frame.symbols.declare_parameter("self")
+            self.writeline(f"{ref} = TemplateReference(context)")
+        frame.symbols.analyze_node(node)
+        frame.toplevel = frame.rootlevel = True
+        frame.require_output_check = have_extends and not self.has_known_extends
+        if have_extends:
+            self.writeline("parent_template = None")
+        self.enter_frame(frame)
+        self.pull_dependencies(node.body)
+        self.blockvisit(node.body, frame)
+        self.leave_frame(frame, with_python_scope=True)
+        self.outdent()
+
+        # make sure that the parent root is called.
+        if have_extends:
+            if not self.has_known_extends:
+                self.indent()
+                self.writeline("if parent_template is not None:")
+            self.indent()
+            if not self.environment.is_async:
+                self.writeline("yield from parent_template.root_render_func(context)")
+            else:
+                self.writeline(
+                    "async for event in parent_template.root_render_func(context):"
+                )
+                self.indent()
+                self.writeline("yield event")
+                self.outdent()
+            self.outdent(1 + (not self.has_known_extends))
+
+        # at this point we now have the blocks collected and can visit them too.
+        for name, block in self.blocks.items():
+            self.writeline(
+                f"{self.func('block_' + name)}(context, missing=missing{envenv}):",
+                block,
+                1,
+            )
+            self.indent()
+            self.write_commons()
+            # It's important that we do not make this frame a child of the
+            # toplevel template.  This would cause a variety of
+            # interesting issues with identifier tracking.
+            block_frame = Frame(eval_ctx)
+            block_frame.block_frame = True
+            undeclared = find_undeclared(block.body, ("self", "super"))
+            if "self" in undeclared:
+                ref = block_frame.symbols.declare_parameter("self")
+                self.writeline(f"{ref} = TemplateReference(context)")
+            if "super" in undeclared:
+                ref = block_frame.symbols.declare_parameter("super")
+                self.writeline(f"{ref} = context.super({name!r}, block_{name})")
+            block_frame.symbols.analyze_node(block)
+            block_frame.block = name
+            self.writeline("_block_vars = {}")
+            self.enter_frame(block_frame)
+            self.pull_dependencies(block.body)
+            self.blockvisit(block.body, block_frame)
+            self.leave_frame(block_frame, with_python_scope=True)
+            self.outdent()
+
+        blocks_kv_str = ", ".join(f"{x!r}: block_{x}" for x in self.blocks)
+        self.writeline(f"blocks = {{{blocks_kv_str}}}", extra=1)
+        debug_kv_str = "&".join(f"{k}={v}" for k, v in self.debug_info)
+        self.writeline(f"debug_info = {debug_kv_str!r}")
+
+    def visit_Block(self, node: nodes.Block, frame: Frame) -> None:
+        """Call a block and register it for the template."""
+        level = 0
+        if frame.toplevel:
+            # if we know that we are a child template, there is no need to
+            # check if we are one
+            if self.has_known_extends:
+                return
+            if self.extends_so_far > 0:
+                self.writeline("if parent_template is None:")
+                self.indent()
+                level += 1
+
+        if node.scoped:
+            context = self.derive_context(frame)
+        else:
+            context = self.get_context_ref()
+
+        if node.required:
+            self.writeline(f"if len(context.blocks[{node.name!r}]) <= 1:", node)
+            self.indent()
+            self.writeline(
+                f'raise TemplateRuntimeError("Required block {node.name!r} not found")',
+                node,
+            )
+            self.outdent()
+
+        if not self.environment.is_async and frame.buffer is None:
+            self.writeline(
+                f"yield from context.blocks[{node.name!r}][0]({context})", node
+            )
+        else:
+            self.writeline(
+                f"{self.choose_async()}for event in"
+                f" context.blocks[{node.name!r}][0]({context}):",
+                node,
+            )
+            self.indent()
+            self.simple_write("event", frame)
+            self.outdent()
+
+        self.outdent(level)
+
+    def visit_Extends(self, node: nodes.Extends, frame: Frame) -> None:
+        """Calls the extender."""
+        if not frame.toplevel:
+            self.fail("cannot use extend from a non top-level scope", node.lineno)
+
+        # if the number of extends statements in general is zero so
+        # far, we don't have to add a check if something extended
+        # the template before this one.
+        if self.extends_so_far > 0:
+
+            # if we have a known extends we just add a template runtime
+            # error into the generated code.  We could catch that at compile
+            # time too, but i welcome it not to confuse users by throwing the
+            # same error at different times just "because we can".
+            if not self.has_known_extends:
+                self.writeline("if parent_template is not None:")
+                self.indent()
+            self.writeline('raise TemplateRuntimeError("extended multiple times")')
+
+            # if we have a known extends already we don't need that code here
+            # as we know that the template execution will end here.
+            if self.has_known_extends:
+                raise CompilerExit()
+            else:
+                self.outdent()
+
+        self.writeline("parent_template = environment.get_template(", node)
+        self.visit(node.template, frame)
+        self.write(f", {self.name!r})")
+        self.writeline("for name, parent_block in parent_template.blocks.items():")
+        self.indent()
+        self.writeline("context.blocks.setdefault(name, []).append(parent_block)")
+        self.outdent()
+
+        # if this extends statement was in the root level we can take
+        # advantage of that information and simplify the generated code
+        # in the top level from this point onwards
+        if frame.rootlevel:
+            self.has_known_extends = True
+
+        # and now we have one more
+        self.extends_so_far += 1
+
+    def visit_Include(self, node: nodes.Include, frame: Frame) -> None:
+        """Handles includes."""
+        if node.ignore_missing:
+            self.writeline("try:")
+            self.indent()
+
+        func_name = "get_or_select_template"
+        if isinstance(node.template, nodes.Const):
+            if isinstance(node.template.value, str):
+                func_name = "get_template"
+            elif isinstance(node.template.value, (tuple, list)):
+                func_name = "select_template"
+        elif isinstance(node.template, (nodes.Tuple, nodes.List)):
+            func_name = "select_template"
+
+        self.writeline(f"template = environment.{func_name}(", node)
+        self.visit(node.template, frame)
+        self.write(f", {self.name!r})")
+        if node.ignore_missing:
+            self.outdent()
+            self.writeline("except TemplateNotFound:")
+            self.indent()
+            self.writeline("pass")
+            self.outdent()
+            self.writeline("else:")
+            self.indent()
+
+        skip_event_yield = False
+        if node.with_context:
+            self.writeline(
+                f"{self.choose_async()}for event in template.root_render_func("
+                "template.new_context(context.get_all(), True,"
+                f" {self.dump_local_context(frame)})):"
+            )
+        elif self.environment.is_async:
+            self.writeline(
+                "for event in (await template._get_default_module_async())"
+                "._body_stream:"
+            )
+        else:
+            self.writeline("yield from template._get_default_module()._body_stream")
+            skip_event_yield = True
+
+        if not skip_event_yield:
+            self.indent()
+            self.simple_write("event", frame)
+            self.outdent()
+
+        if node.ignore_missing:
+            self.outdent()
+
+    def _import_common(
+        self, node: t.Union[nodes.Import, nodes.FromImport], frame: Frame
+    ) -> None:
+        self.write(f"{self.choose_async('await ')}environment.get_template(")
+        self.visit(node.template, frame)
+        self.write(f", {self.name!r}).")
+
+        if node.with_context:
+            f_name = f"make_module{self.choose_async('_async')}"
+            self.write(
+                f"{f_name}(context.get_all(), True, {self.dump_local_context(frame)})"
+            )
+        else:
+            self.write(f"_get_default_module{self.choose_async('_async')}(context)")
+
+    def visit_Import(self, node: nodes.Import, frame: Frame) -> None:
+        """Visit regular imports."""
+        self.writeline(f"{frame.symbols.ref(node.target)} = ", node)
+        if frame.toplevel:
+            self.write(f"context.vars[{node.target!r}] = ")
+
+        self._import_common(node, frame)
+
+        if frame.toplevel and not node.target.startswith("_"):
+            self.writeline(f"context.exported_vars.discard({node.target!r})")
+
+    def visit_FromImport(self, node: nodes.FromImport, frame: Frame) -> None:
+        """Visit named imports."""
+        self.newline(node)
+        self.write("included_template = ")
+        self._import_common(node, frame)
+        var_names = []
+        discarded_names = []
+        for name in node.names:
+            if isinstance(name, tuple):
+                name, alias = name
+            else:
+                alias = name
+            self.writeline(
+                f"{frame.symbols.ref(alias)} ="
+                f" getattr(included_template, {name!r}, missing)"
+            )
+            self.writeline(f"if {frame.symbols.ref(alias)} is missing:")
+            self.indent()
+            message = (
+                "the template {included_template.__name__!r}"
+                f" (imported on {self.position(node)})"
+                f" does not export the requested name {name!r}"
+            )
+            self.writeline(
+                f"{frame.symbols.ref(alias)} = undefined(f{message!r}, name={name!r})"
+            )
+            self.outdent()
+            if frame.toplevel:
+                var_names.append(alias)
+                if not alias.startswith("_"):
+                    discarded_names.append(alias)
+
+        if var_names:
+            if len(var_names) == 1:
+                name = var_names[0]
+                self.writeline(f"context.vars[{name!r}] = {frame.symbols.ref(name)}")
+            else:
+                names_kv = ", ".join(
+                    f"{name!r}: {frame.symbols.ref(name)}" for name in var_names
+                )
+                self.writeline(f"context.vars.update({{{names_kv}}})")
+        if discarded_names:
+            if len(discarded_names) == 1:
+                self.writeline(f"context.exported_vars.discard({discarded_names[0]!r})")
+            else:
+                names_str = ", ".join(map(repr, discarded_names))
+                self.writeline(
+                    f"context.exported_vars.difference_update(({names_str}))"
+                )
+
+    def visit_For(self, node: nodes.For, frame: Frame) -> None:
+        loop_frame = frame.inner()
+        loop_frame.loop_frame = True
+        test_frame = frame.inner()
+        else_frame = frame.inner()
+
+        # try to figure out if we have an extended loop.  An extended loop
+        # is necessary if the loop is in recursive mode if the special loop
+        # variable is accessed in the body if the body is a scoped block.
+        extended_loop = (
+            node.recursive
+            or "loop"
+            in find_undeclared(node.iter_child_nodes(only=("body",)), ("loop",))
+            or any(block.scoped for block in node.find_all(nodes.Block))
+        )
+
+        loop_ref = None
+        if extended_loop:
+            loop_ref = loop_frame.symbols.declare_parameter("loop")
+
+        loop_frame.symbols.analyze_node(node, for_branch="body")
+        if node.else_:
+            else_frame.symbols.analyze_node(node, for_branch="else")
+
+        if node.test:
+            loop_filter_func = self.temporary_identifier()
+            test_frame.symbols.analyze_node(node, for_branch="test")
+            self.writeline(f"{self.func(loop_filter_func)}(fiter):", node.test)
+            self.indent()
+            self.enter_frame(test_frame)
+            self.writeline(self.choose_async("async for ", "for "))
+            self.visit(node.target, loop_frame)
+            self.write(" in ")
+            self.write(self.choose_async("auto_aiter(fiter)", "fiter"))
+            self.write(":")
+            self.indent()
+            self.writeline("if ", node.test)
+            self.visit(node.test, test_frame)
+            self.write(":")
+            self.indent()
+            self.writeline("yield ")
+            self.visit(node.target, loop_frame)
+            self.outdent(3)
+            self.leave_frame(test_frame, with_python_scope=True)
+
+        # if we don't have an recursive loop we have to find the shadowed
+        # variables at that point.  Because loops can be nested but the loop
+        # variable is a special one we have to enforce aliasing for it.
+        if node.recursive:
+            self.writeline(
+                f"{self.func('loop')}(reciter, loop_render_func, depth=0):", node
+            )
+            self.indent()
+            self.buffer(loop_frame)
+
+            # Use the same buffer for the else frame
+            else_frame.buffer = loop_frame.buffer
+
+        # make sure the loop variable is a special one and raise a template
+        # assertion error if a loop tries to write to loop
+        if extended_loop:
+            self.writeline(f"{loop_ref} = missing")
+
+        for name in node.find_all(nodes.Name):
+            if name.ctx == "store" and name.name == "loop":
+                self.fail(
+                    "Can't assign to special loop variable in for-loop target",
+                    name.lineno,
+                )
+
+        if node.else_:
+            iteration_indicator = self.temporary_identifier()
+            self.writeline(f"{iteration_indicator} = 1")
+
+        self.writeline(self.choose_async("async for ", "for "), node)
+        self.visit(node.target, loop_frame)
+        if extended_loop:
+            self.write(f", {loop_ref} in {self.choose_async('Async')}LoopContext(")
+        else:
+            self.write(" in ")
+
+        if node.test:
+            self.write(f"{loop_filter_func}(")
+        if node.recursive:
+            self.write("reciter")
+        else:
+            if self.environment.is_async and not extended_loop:
+                self.write("auto_aiter(")
+            self.visit(node.iter, frame)
+            if self.environment.is_async and not extended_loop:
+                self.write(")")
+        if node.test:
+            self.write(")")
+
+        if node.recursive:
+            self.write(", undefined, loop_render_func, depth):")
+        else:
+            self.write(", undefined):" if extended_loop else ":")
+
+        self.indent()
+        self.enter_frame(loop_frame)
+
+        self.writeline("_loop_vars = {}")
+        self.blockvisit(node.body, loop_frame)
+        if node.else_:
+            self.writeline(f"{iteration_indicator} = 0")
+        self.outdent()
+        self.leave_frame(
+            loop_frame, with_python_scope=node.recursive and not node.else_
+        )
+
+        if node.else_:
+            self.writeline(f"if {iteration_indicator}:")
+            self.indent()
+            self.enter_frame(else_frame)
+            self.blockvisit(node.else_, else_frame)
+            self.leave_frame(else_frame)
+            self.outdent()
+
+        # if the node was recursive we have to return the buffer contents
+        # and start the iteration code
+        if node.recursive:
+            self.return_buffer_contents(loop_frame)
+            self.outdent()
+            self.start_write(frame, node)
+            self.write(f"{self.choose_async('await ')}loop(")
+            if self.environment.is_async:
+                self.write("auto_aiter(")
+            self.visit(node.iter, frame)
+            if self.environment.is_async:
+                self.write(")")
+            self.write(", loop)")
+            self.end_write(frame)
+
+        # at the end of the iteration, clear any assignments made in the
+        # loop from the top level
+        if self._assign_stack:
+            self._assign_stack[-1].difference_update(loop_frame.symbols.stores)
+
+    def visit_If(self, node: nodes.If, frame: Frame) -> None:
+        if_frame = frame.soft()
+        self.writeline("if ", node)
+        self.visit(node.test, if_frame)
+        self.write(":")
+        self.indent()
+        self.blockvisit(node.body, if_frame)
+        self.outdent()
+        for elif_ in node.elif_:
+            self.writeline("elif ", elif_)
+            self.visit(elif_.test, if_frame)
+            self.write(":")
+            self.indent()
+            self.blockvisit(elif_.body, if_frame)
+            self.outdent()
+        if node.else_:
+            self.writeline("else:")
+            self.indent()
+            self.blockvisit(node.else_, if_frame)
+            self.outdent()
+
+    def visit_Macro(self, node: nodes.Macro, frame: Frame) -> None:
+        macro_frame, macro_ref = self.macro_body(node, frame)
+        self.newline()
+        if frame.toplevel:
+            if not node.name.startswith("_"):
+                self.write(f"context.exported_vars.add({node.name!r})")
+            self.writeline(f"context.vars[{node.name!r}] = ")
+        self.write(f"{frame.symbols.ref(node.name)} = ")
+        self.macro_def(macro_ref, macro_frame)
+
+    def visit_CallBlock(self, node: nodes.CallBlock, frame: Frame) -> None:
+        call_frame, macro_ref = self.macro_body(node, frame)
+        self.writeline("caller = ")
+        self.macro_def(macro_ref, call_frame)
+        self.start_write(frame, node)
+        self.visit_Call(node.call, frame, forward_caller=True)
+        self.end_write(frame)
+
+    def visit_FilterBlock(self, node: nodes.FilterBlock, frame: Frame) -> None:
+        filter_frame = frame.inner()
+        filter_frame.symbols.analyze_node(node)
+        self.enter_frame(filter_frame)
+        self.buffer(filter_frame)
+        self.blockvisit(node.body, filter_frame)
+        self.start_write(frame, node)
+        self.visit_Filter(node.filter, filter_frame)
+        self.end_write(frame)
+        self.leave_frame(filter_frame)
+
+    def visit_With(self, node: nodes.With, frame: Frame) -> None:
+        with_frame = frame.inner()
+        with_frame.symbols.analyze_node(node)
+        self.enter_frame(with_frame)
+        for target, expr in zip(node.targets, node.values):
+            self.newline()
+            self.visit(target, with_frame)
+            self.write(" = ")
+            self.visit(expr, frame)
+        self.blockvisit(node.body, with_frame)
+        self.leave_frame(with_frame)
+
+    def visit_ExprStmt(self, node: nodes.ExprStmt, frame: Frame) -> None:
+        self.newline(node)
+        self.visit(node.node, frame)
+
+    class _FinalizeInfo(t.NamedTuple):
+        const: t.Optional[t.Callable[..., str]]
+        src: t.Optional[str]
+
+    @staticmethod
+    def _default_finalize(value: t.Any) -> t.Any:
+        """The default finalize function if the environment isn't
+        configured with one. Or, if the environment has one, this is
+        called on that function's output for constants.
+        """
+        return str(value)
+
+    _finalize: t.Optional[_FinalizeInfo] = None
+
+    def _make_finalize(self) -> _FinalizeInfo:
+        """Build the finalize function to be used on constants and at
+        runtime. Cached so it's only created once for all output nodes.
+
+        Returns a ``namedtuple`` with the following attributes:
+
+        ``const``
+            A function to finalize constant data at compile time.
+
+        ``src``
+            Source code to output around nodes to be evaluated at
+            runtime.
+        """
+        if self._finalize is not None:
+            return self._finalize
+
+        finalize: t.Optional[t.Callable[..., t.Any]]
+        finalize = default = self._default_finalize
+        src = None
+
+        if self.environment.finalize:
+            src = "environment.finalize("
+            env_finalize = self.environment.finalize
+            pass_arg = {
+                _PassArg.context: "context",
+                _PassArg.eval_context: "context.eval_ctx",
+                _PassArg.environment: "environment",
+            }.get(
+                _PassArg.from_obj(env_finalize)  # type: ignore
+            )
+            finalize = None
+
+            if pass_arg is None:
+
+                def finalize(value: t.Any) -> t.Any:
+                    return default(env_finalize(value))
+
+            else:
+                src = f"{src}{pass_arg}, "
+
+                if pass_arg == "environment":
+
+                    def finalize(value: t.Any) -> t.Any:
+                        return default(env_finalize(self.environment, value))
+
+        self._finalize = self._FinalizeInfo(finalize, src)
+        return self._finalize
+
+    def _output_const_repr(self, group: t.Iterable[t.Any]) -> str:
+        """Given a group of constant values converted from ``Output``
+        child nodes, produce a string to write to the template module
+        source.
+        """
+        return repr(concat(group))
+
+    def _output_child_to_const(
+        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
+    ) -> str:
+        """Try to optimize a child of an ``Output`` node by trying to
+        convert it to constant, finalized data at compile time.
+
+        If :exc:`Impossible` is raised, the node is not constant and
+        will be evaluated at runtime. Any other exception will also be
+        evaluated at runtime for easier debugging.
+        """
+        const = node.as_const(frame.eval_ctx)
+
+        if frame.eval_ctx.autoescape:
+            const = escape(const)
+
+        # Template data doesn't go through finalize.
+        if isinstance(node, nodes.TemplateData):
+            return str(const)
+
+        return finalize.const(const)  # type: ignore
+
+    def _output_child_pre(
+        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
+    ) -> None:
+        """Output extra source code before visiting a child of an
+        ``Output`` node.
+        """
+        if frame.eval_ctx.volatile:
+            self.write("(escape if context.eval_ctx.autoescape else str)(")
+        elif frame.eval_ctx.autoescape:
+            self.write("escape(")
+        else:
+            self.write("str(")
+
+        if finalize.src is not None:
+            self.write(finalize.src)
+
+    def _output_child_post(
+        self, node: nodes.Expr, frame: Frame, finalize: _FinalizeInfo
+    ) -> None:
+        """Output extra source code after visiting a child of an
+        ``Output`` node.
+        """
+        self.write(")")
+
+        if finalize.src is not None:
+            self.write(")")
+
+    def visit_Output(self, node: nodes.Output, frame: Frame) -> None:
+        # If an extends is active, don't render outside a block.
+        if frame.require_output_check:
+            # A top-level extends is known to exist at compile time.
+            if self.has_known_extends:
+                return
+
+            self.writeline("if parent_template is None:")
+            self.indent()
+
+        finalize = self._make_finalize()
+        body: t.List[t.Union[t.List[t.Any], nodes.Expr]] = []
+
+        # Evaluate constants at compile time if possible. Each item in
+        # body will be either a list of static data or a node to be
+        # evaluated at runtime.
+        for child in node.nodes:
+            try:
+                if not (
+                    # If the finalize function requires runtime context,
+                    # constants can't be evaluated at compile time.
+                    finalize.const
+                    # Unless it's basic template data that won't be
+                    # finalized anyway.
+                    or isinstance(child, nodes.TemplateData)
+                ):
+                    raise nodes.Impossible()
+
+                const = self._output_child_to_const(child, frame, finalize)
+            except (nodes.Impossible, Exception):
+                # The node was not constant and needs to be evaluated at
+                # runtime. Or another error was raised, which is easier
+                # to debug at runtime.
+                body.append(child)
+                continue
+
+            if body and isinstance(body[-1], list):
+                body[-1].append(const)
+            else:
+                body.append([const])
+
+        if frame.buffer is not None:
+            if len(body) == 1:
+                self.writeline(f"{frame.buffer}.append(")
+            else:
+                self.writeline(f"{frame.buffer}.extend((")
+
+            self.indent()
+
+        for item in body:
+            if isinstance(item, list):
+                # A group of constant data to join and output.
+                val = self._output_const_repr(item)
+
+                if frame.buffer is None:
+                    self.writeline("yield " + val)
+                else:
+                    self.writeline(val + ",")
+            else:
+                if frame.buffer is None:
+                    self.writeline("yield ", item)
+                else:
+                    self.newline(item)
+
+                # A node to be evaluated at runtime.
+                self._output_child_pre(item, frame, finalize)
+                self.visit(item, frame)
+                self._output_child_post(item, frame, finalize)
+
+                if frame.buffer is not None:
+                    self.write(",")
+
+        if frame.buffer is not None:
+            self.outdent()
+            self.writeline(")" if len(body) == 1 else "))")
+
+        if frame.require_output_check:
+            self.outdent()
+
+    def visit_Assign(self, node: nodes.Assign, frame: Frame) -> None:
+        self.push_assign_tracking()
+        self.newline(node)
+        self.visit(node.target, frame)
+        self.write(" = ")
+        self.visit(node.node, frame)
+        self.pop_assign_tracking(frame)
+
+    def visit_AssignBlock(self, node: nodes.AssignBlock, frame: Frame) -> None:
+        self.push_assign_tracking()
+        block_frame = frame.inner()
+        # This is a special case.  Since a set block always captures we
+        # will disable output checks.  This way one can use set blocks
+        # toplevel even in extended templates.
+        block_frame.require_output_check = False
+        block_frame.symbols.analyze_node(node)
+        self.enter_frame(block_frame)
+        self.buffer(block_frame)
+        self.blockvisit(node.body, block_frame)
+        self.newline(node)
+        self.visit(node.target, frame)
+        self.write(" = (Markup if context.eval_ctx.autoescape else identity)(")
+        if node.filter is not None:
+            self.visit_Filter(node.filter, block_frame)
+        else:
+            self.write(f"concat({block_frame.buffer})")
+        self.write(")")
+        self.pop_assign_tracking(frame)
+        self.leave_frame(block_frame)
+
+    # -- Expression Visitors
+
+    def visit_Name(self, node: nodes.Name, frame: Frame) -> None:
+        if node.ctx == "store" and (
+            frame.toplevel or frame.loop_frame or frame.block_frame
+        ):
+            if self._assign_stack:
+                self._assign_stack[-1].add(node.name)
+        ref = frame.symbols.ref(node.name)
+
+        # If we are looking up a variable we might have to deal with the
+        # case where it's undefined.  We can skip that case if the load
+        # instruction indicates a parameter which are always defined.
+        if node.ctx == "load":
+            load = frame.symbols.find_load(ref)
+            if not (
+                load is not None
+                and load[0] == VAR_LOAD_PARAMETER
+                and not self.parameter_is_undeclared(ref)
+            ):
+                self.write(
+                    f"(undefined(name={node.name!r}) if {ref} is missing else {ref})"
+                )
+                return
+
+        self.write(ref)
+
+    def visit_NSRef(self, node: nodes.NSRef, frame: Frame) -> None:
+        # NSRefs can only be used to store values; since they use the normal
+        # `foo.bar` notation they will be parsed as a normal attribute access
+        # when used anywhere but in a `set` context
+        ref = frame.symbols.ref(node.name)
+        self.writeline(f"if not isinstance({ref}, Namespace):")
+        self.indent()
+        self.writeline(
+            "raise TemplateRuntimeError"
+            '("cannot assign attribute on non-namespace object")'
+        )
+        self.outdent()
+        self.writeline(f"{ref}[{node.attr!r}]")
+
+    def visit_Const(self, node: nodes.Const, frame: Frame) -> None:
+        val = node.as_const(frame.eval_ctx)
+        if isinstance(val, float):
+            self.write(str(val))
+        else:
+            self.write(repr(val))
+
+    def visit_TemplateData(self, node: nodes.TemplateData, frame: Frame) -> None:
+        try:
+            self.write(repr(node.as_const(frame.eval_ctx)))
+        except nodes.Impossible:
+            self.write(
+                f"(Markup if context.eval_ctx.autoescape else identity)({node.data!r})"
+            )
+
+    def visit_Tuple(self, node: nodes.Tuple, frame: Frame) -> None:
+        self.write("(")
+        idx = -1
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item, frame)
+        self.write(",)" if idx == 0 else ")")
+
+    def visit_List(self, node: nodes.List, frame: Frame) -> None:
+        self.write("[")
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item, frame)
+        self.write("]")
+
+    def visit_Dict(self, node: nodes.Dict, frame: Frame) -> None:
+        self.write("{")
+        for idx, item in enumerate(node.items):
+            if idx:
+                self.write(", ")
+            self.visit(item.key, frame)
+            self.write(": ")
+            self.visit(item.value, frame)
+        self.write("}")
+
+    visit_Add = _make_binop("+")
+    visit_Sub = _make_binop("-")
+    visit_Mul = _make_binop("*")
+    visit_Div = _make_binop("/")
+    visit_FloorDiv = _make_binop("//")
+    visit_Pow = _make_binop("**")
+    visit_Mod = _make_binop("%")
+    visit_And = _make_binop("and")
+    visit_Or = _make_binop("or")
+    visit_Pos = _make_unop("+")
+    visit_Neg = _make_unop("-")
+    visit_Not = _make_unop("not ")
+
+    @optimizeconst
+    def visit_Concat(self, node: nodes.Concat, frame: Frame) -> None:
+        if frame.eval_ctx.volatile:
+            func_name = "(markup_join if context.eval_ctx.volatile else str_join)"
+        elif frame.eval_ctx.autoescape:
+            func_name = "markup_join"
+        else:
+            func_name = "str_join"
+        self.write(f"{func_name}((")
+        for arg in node.nodes:
+            self.visit(arg, frame)
+            self.write(", ")
+        self.write("))")
+
+    @optimizeconst
+    def visit_Compare(self, node: nodes.Compare, frame: Frame) -> None:
+        self.write("(")
+        self.visit(node.expr, frame)
+        for op in node.ops:
+            self.visit(op, frame)
+        self.write(")")
+
+    def visit_Operand(self, node: nodes.Operand, frame: Frame) -> None:
+        self.write(f" {operators[node.op]} ")
+        self.visit(node.expr, frame)
+
+    @optimizeconst
+    def visit_Getattr(self, node: nodes.Getattr, frame: Frame) -> None:
+        if self.environment.is_async:
+            self.write("(await auto_await(")
+
+        self.write("environment.getattr(")
+        self.visit(node.node, frame)
+        self.write(f", {node.attr!r})")
+
+        if self.environment.is_async:
+            self.write("))")
+
+    @optimizeconst
+    def visit_Getitem(self, node: nodes.Getitem, frame: Frame) -> None:
+        # slices bypass the environment getitem method.
+        if isinstance(node.arg, nodes.Slice):
+            self.visit(node.node, frame)
+            self.write("[")
+            self.visit(node.arg, frame)
+            self.write("]")
+        else:
+            if self.environment.is_async:
+                self.write("(await auto_await(")
+
+            self.write("environment.getitem(")
+            self.visit(node.node, frame)
+            self.write(", ")
+            self.visit(node.arg, frame)
+            self.write(")")
+
+            if self.environment.is_async:
+                self.write("))")
+
+    def visit_Slice(self, node: nodes.Slice, frame: Frame) -> None:
+        if node.start is not None:
+            self.visit(node.start, frame)
+        self.write(":")
+        if node.stop is not None:
+            self.visit(node.stop, frame)
+        if node.step is not None:
+            self.write(":")
+            self.visit(node.step, frame)
+
+    @contextmanager
+    def _filter_test_common(
+        self, node: t.Union[nodes.Filter, nodes.Test], frame: Frame, is_filter: bool
+    ) -> t.Iterator[None]:
+        if self.environment.is_async:
+            self.write("(await auto_await(")
+
+        if is_filter:
+            self.write(f"{self.filters[node.name]}(")
+            func = self.environment.filters.get(node.name)
+        else:
+            self.write(f"{self.tests[node.name]}(")
+            func = self.environment.tests.get(node.name)
+
+        # When inside an If or CondExpr frame, allow the filter to be
+        # undefined at compile time and only raise an error if it's
+        # actually called at runtime. See pull_dependencies.
+        if func is None and not frame.soft_frame:
+            type_name = "filter" if is_filter else "test"
+            self.fail(f"No {type_name} named {node.name!r}.", node.lineno)
+
+        pass_arg = {
+            _PassArg.context: "context",
+            _PassArg.eval_context: "context.eval_ctx",
+            _PassArg.environment: "environment",
+        }.get(
+            _PassArg.from_obj(func)  # type: ignore
+        )
+
+        if pass_arg is not None:
+            self.write(f"{pass_arg}, ")
+
+        # Back to the visitor function to handle visiting the target of
+        # the filter or test.
+        yield
+
+        self.signature(node, frame)
+        self.write(")")
+
+        if self.environment.is_async:
+            self.write("))")
+
+    @optimizeconst
+    def visit_Filter(self, node: nodes.Filter, frame: Frame) -> None:
+        with self._filter_test_common(node, frame, True):
+            # if the filter node is None we are inside a filter block
+            # and want to write to the current buffer
+            if node.node is not None:
+                self.visit(node.node, frame)
+            elif frame.eval_ctx.volatile:
+                self.write(
+                    f"(Markup(concat({frame.buffer}))"
+                    f" if context.eval_ctx.autoescape else concat({frame.buffer}))"
+                )
+            elif frame.eval_ctx.autoescape:
+                self.write(f"Markup(concat({frame.buffer}))")
+            else:
+                self.write(f"concat({frame.buffer})")
+
+    @optimizeconst
+    def visit_Test(self, node: nodes.Test, frame: Frame) -> None:
+        with self._filter_test_common(node, frame, False):
+            self.visit(node.node, frame)
+
+    @optimizeconst
+    def visit_CondExpr(self, node: nodes.CondExpr, frame: Frame) -> None:
+        frame = frame.soft()
+
+        def write_expr2() -> None:
+            if node.expr2 is not None:
+                self.visit(node.expr2, frame)
+                return
+
+            self.write(
+                f'cond_expr_undefined("the inline if-expression on'
+                f" {self.position(node)} evaluated to false and no else"
+                f' section was defined.")'
+            )
+
+        self.write("(")
+        self.visit(node.expr1, frame)
+        self.write(" if ")
+        self.visit(node.test, frame)
+        self.write(" else ")
+        write_expr2()
+        self.write(")")
+
+    @optimizeconst
+    def visit_Call(
+        self, node: nodes.Call, frame: Frame, forward_caller: bool = False
+    ) -> None:
+        if self.environment.is_async:
+            self.write("(await auto_await(")
+        if self.environment.sandboxed:
+            self.write("environment.call(context, ")
+        else:
+            self.write("context.call(")
+        self.visit(node.node, frame)
+        extra_kwargs = {"caller": "caller"} if forward_caller else None
+        loop_kwargs = {"_loop_vars": "_loop_vars"} if frame.loop_frame else {}
+        block_kwargs = {"_block_vars": "_block_vars"} if frame.block_frame else {}
+        if extra_kwargs:
+            extra_kwargs.update(loop_kwargs, **block_kwargs)
+        elif loop_kwargs or block_kwargs:
+            extra_kwargs = dict(loop_kwargs, **block_kwargs)
+        self.signature(node, frame, extra_kwargs)
+        self.write(")")
+        if self.environment.is_async:
+            self.write("))")
+
+    def visit_Keyword(self, node: nodes.Keyword, frame: Frame) -> None:
+        self.write(node.key + "=")
+        self.visit(node.value, frame)
+
+    # -- Unused nodes for extensions
+
+    def visit_MarkSafe(self, node: nodes.MarkSafe, frame: Frame) -> None:
+        self.write("Markup(")
+        self.visit(node.expr, frame)
+        self.write(")")
+
+    def visit_MarkSafeIfAutoescape(
+        self, node: nodes.MarkSafeIfAutoescape, frame: Frame
+    ) -> None:
+        self.write("(Markup if context.eval_ctx.autoescape else identity)(")
+        self.visit(node.expr, frame)
+        self.write(")")
+
+    def visit_EnvironmentAttribute(
+        self, node: nodes.EnvironmentAttribute, frame: Frame
+    ) -> None:
+        self.write("environment." + node.name)
+
+    def visit_ExtensionAttribute(
+        self, node: nodes.ExtensionAttribute, frame: Frame
+    ) -> None:
+        self.write(f"environment.extensions[{node.identifier!r}].{node.name}")
+
+    def visit_ImportedName(self, node: nodes.ImportedName, frame: Frame) -> None:
+        self.write(self.import_aliases[node.importname])
+
+    def visit_InternalName(self, node: nodes.InternalName, frame: Frame) -> None:
+        self.write(node.name)
+
+    def visit_ContextReference(
+        self, node: nodes.ContextReference, frame: Frame
+    ) -> None:
+        self.write("context")
+
+    def visit_DerivedContextReference(
+        self, node: nodes.DerivedContextReference, frame: Frame
+    ) -> None:
+        self.write(self.derive_context(frame))
+
+    def visit_Continue(self, node: nodes.Continue, frame: Frame) -> None:
+        self.writeline("continue", node)
+
+    def visit_Break(self, node: nodes.Break, frame: Frame) -> None:
+        self.writeline("break", node)
+
+    def visit_Scope(self, node: nodes.Scope, frame: Frame) -> None:
+        scope_frame = frame.inner()
+        scope_frame.symbols.analyze_node(node)
+        self.enter_frame(scope_frame)
+        self.blockvisit(node.body, scope_frame)
+        self.leave_frame(scope_frame)
+
+    def visit_OverlayScope(self, node: nodes.OverlayScope, frame: Frame) -> None:
+        ctx = self.temporary_identifier()
+        self.writeline(f"{ctx} = {self.derive_context(frame)}")
+        self.writeline(f"{ctx}.vars = ")
+        self.visit(node.context, frame)
+        self.push_context_reference(ctx)
+
+        scope_frame = frame.inner(isolated=True)
+        scope_frame.symbols.analyze_node(node)
+        self.enter_frame(scope_frame)
+        self.blockvisit(node.body, scope_frame)
+        self.leave_frame(scope_frame)
+        self.pop_context_reference()
+
+    def visit_EvalContextModifier(
+        self, node: nodes.EvalContextModifier, frame: Frame
+    ) -> None:
+        for keyword in node.options:
+            self.writeline(f"context.eval_ctx.{keyword.key} = ")
+            self.visit(keyword.value, frame)
+            try:
+                val = keyword.value.as_const(frame.eval_ctx)
+            except nodes.Impossible:
+                frame.eval_ctx.volatile = True
+            else:
+                setattr(frame.eval_ctx, keyword.key, val)
+
+    def visit_ScopedEvalContextModifier(
+        self, node: nodes.ScopedEvalContextModifier, frame: Frame
+    ) -> None:
+        old_ctx_name = self.temporary_identifier()
+        saved_ctx = frame.eval_ctx.save()
+        self.writeline(f"{old_ctx_name} = context.eval_ctx.save()")
+        self.visit_EvalContextModifier(node, frame)
+        for child in node.body:
+            self.visit(child, frame)
+        frame.eval_ctx.revert(saved_ctx)
+        self.writeline(f"context.eval_ctx.revert({old_ctx_name})")
diff --git a/venv/lib/python3.9/site-packages/jinja2/constants.py b/venv/lib/python3.9/site-packages/jinja2/constants.py
new file mode 100644
index 0000000..41a1c23
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/constants.py
@@ -0,0 +1,20 @@
+#: list of lorem ipsum words used by the lipsum() helper function
+LOREM_IPSUM_WORDS = """\
+a ac accumsan ad adipiscing aenean aliquam aliquet amet ante aptent arcu at
+auctor augue bibendum blandit class commodo condimentum congue consectetuer
+consequat conubia convallis cras cubilia cum curabitur curae cursus dapibus
+diam dictum dictumst dignissim dis dolor donec dui duis egestas eget eleifend
+elementum elit enim erat eros est et etiam eu euismod facilisi facilisis fames
+faucibus felis fermentum feugiat fringilla fusce gravida habitant habitasse hac
+hendrerit hymenaeos iaculis id imperdiet in inceptos integer interdum ipsum
+justo lacinia lacus laoreet lectus leo libero ligula litora lobortis lorem
+luctus maecenas magna magnis malesuada massa mattis mauris metus mi molestie
+mollis montes morbi mus nam nascetur natoque nec neque netus nibh nisi nisl non
+nonummy nostra nulla nullam nunc odio orci ornare parturient pede pellentesque
+penatibus per pharetra phasellus placerat platea porta porttitor posuere
+potenti praesent pretium primis proin pulvinar purus quam quis quisque rhoncus
+ridiculus risus rutrum sagittis sapien scelerisque sed sem semper senectus sit
+sociis sociosqu sodales sollicitudin suscipit suspendisse taciti tellus tempor
+tempus tincidunt torquent tortor tristique turpis ullamcorper ultrices
+ultricies urna ut varius vehicula vel velit venenatis vestibulum vitae vivamus
+viverra volutpat vulputate"""
diff --git a/venv/lib/python3.9/site-packages/jinja2/debug.py b/venv/lib/python3.9/site-packages/jinja2/debug.py
new file mode 100644
index 0000000..7ed7e92
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/debug.py
@@ -0,0 +1,191 @@
+import sys
+import typing as t
+from types import CodeType
+from types import TracebackType
+
+from .exceptions import TemplateSyntaxError
+from .utils import internal_code
+from .utils import missing
+
+if t.TYPE_CHECKING:
+    from .runtime import Context
+
+
+def rewrite_traceback_stack(source: t.Optional[str] = None) -> BaseException:
+    """Rewrite the current exception to replace any tracebacks from
+    within compiled template code with tracebacks that look like they
+    came from the template source.
+
+    This must be called within an ``except`` block.
+
+    :param source: For ``TemplateSyntaxError``, the original source if
+        known.
+    :return: The original exception with the rewritten traceback.
+    """
+    _, exc_value, tb = sys.exc_info()
+    exc_value = t.cast(BaseException, exc_value)
+    tb = t.cast(TracebackType, tb)
+
+    if isinstance(exc_value, TemplateSyntaxError) and not exc_value.translated:
+        exc_value.translated = True
+        exc_value.source = source
+        # Remove the old traceback, otherwise the frames from the
+        # compiler still show up.
+        exc_value.with_traceback(None)
+        # Outside of runtime, so the frame isn't executing template
+        # code, but it still needs to point at the template.
+        tb = fake_traceback(
+            exc_value, None, exc_value.filename or "<unknown>", exc_value.lineno
+        )
+    else:
+        # Skip the frame for the render function.
+        tb = tb.tb_next
+
+    stack = []
+
+    # Build the stack of traceback object, replacing any in template
+    # code with the source file and line information.
+    while tb is not None:
+        # Skip frames decorated with @internalcode. These are internal
+        # calls that aren't useful in template debugging output.
+        if tb.tb_frame.f_code in internal_code:
+            tb = tb.tb_next
+            continue
+
+        template = tb.tb_frame.f_globals.get("__jinja_template__")
+
+        if template is not None:
+            lineno = template.get_corresponding_lineno(tb.tb_lineno)
+            fake_tb = fake_traceback(exc_value, tb, template.filename, lineno)
+            stack.append(fake_tb)
+        else:
+            stack.append(tb)
+
+        tb = tb.tb_next
+
+    tb_next = None
+
+    # Assign tb_next in reverse to avoid circular references.
+    for tb in reversed(stack):
+        tb.tb_next = tb_next
+        tb_next = tb
+
+    return exc_value.with_traceback(tb_next)
+
+
+def fake_traceback(  # type: ignore
+    exc_value: BaseException, tb: t.Optional[TracebackType], filename: str, lineno: int
+) -> TracebackType:
+    """Produce a new traceback object that looks like it came from the
+    template source instead of the compiled code. The filename, line
+    number, and location name will point to the template, and the local
+    variables will be the current template context.
+
+    :param exc_value: The original exception to be re-raised to create
+        the new traceback.
+    :param tb: The original traceback to get the local variables and
+        code info from.
+    :param filename: The template filename.
+    :param lineno: The line number in the template source.
+    """
+    if tb is not None:
+        # Replace the real locals with the context that would be
+        # available at that point in the template.
+        locals = get_template_locals(tb.tb_frame.f_locals)
+        locals.pop("__jinja_exception__", None)
+    else:
+        locals = {}
+
+    globals = {
+        "__name__": filename,
+        "__file__": filename,
+        "__jinja_exception__": exc_value,
+    }
+    # Raise an exception at the correct line number.
+    code: CodeType = compile(
+        "\n" * (lineno - 1) + "raise __jinja_exception__", filename, "exec"
+    )
+
+    # Build a new code object that points to the template file and
+    # replaces the location with a block name.
+    location = "template"
+
+    if tb is not None:
+        function = tb.tb_frame.f_code.co_name
+
+        if function == "root":
+            location = "top-level template code"
+        elif function.startswith("block_"):
+            location = f"block {function[6:]!r}"
+
+    if sys.version_info >= (3, 8):
+        code = code.replace(co_name=location)
+    else:
+        code = CodeType(
+            code.co_argcount,
+            code.co_kwonlyargcount,
+            code.co_nlocals,
+            code.co_stacksize,
+            code.co_flags,
+            code.co_code,
+            code.co_consts,
+            code.co_names,
+            code.co_varnames,
+            code.co_filename,
+            location,
+            code.co_firstlineno,
+            code.co_lnotab,
+            code.co_freevars,
+            code.co_cellvars,
+        )
+
+    # Execute the new code, which is guaranteed to raise, and return
+    # the new traceback without this frame.
+    try:
+        exec(code, globals, locals)
+    except BaseException:
+        return sys.exc_info()[2].tb_next  # type: ignore
+
+
+def get_template_locals(real_locals: t.Mapping[str, t.Any]) -> t.Dict[str, t.Any]:
+    """Based on the runtime locals, get the context that would be
+    available at that point in the template.
+    """
+    # Start with the current template context.
+    ctx: "t.Optional[Context]" = real_locals.get("context")
+
+    if ctx is not None:
+        data: t.Dict[str, t.Any] = ctx.get_all().copy()
+    else:
+        data = {}
+
+    # Might be in a derived context that only sets local variables
+    # rather than pushing a context. Local variables follow the scheme
+    # l_depth_name. Find the highest-depth local that has a value for
+    # each name.
+    local_overrides: t.Dict[str, t.Tuple[int, t.Any]] = {}
+
+    for name, value in real_locals.items():
+        if not name.startswith("l_") or value is missing:
+            # Not a template variable, or no longer relevant.
+            continue
+
+        try:
+            _, depth_str, name = name.split("_", 2)
+            depth = int(depth_str)
+        except ValueError:
+            continue
+
+        cur_depth = local_overrides.get(name, (-1,))[0]
+
+        if cur_depth < depth:
+            local_overrides[name] = (depth, value)
+
+    # Modify the context with any derived context.
+    for name, (_, value) in local_overrides.items():
+        if value is missing:
+            data.pop(name, None)
+        else:
+            data[name] = value
+
+    return data
diff --git a/venv/lib/python3.9/site-packages/jinja2/defaults.py b/venv/lib/python3.9/site-packages/jinja2/defaults.py
new file mode 100644
index 0000000..638cad3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/defaults.py
@@ -0,0 +1,48 @@
+import typing as t
+
+from .filters import FILTERS as DEFAULT_FILTERS  # noqa: F401
+from .tests import TESTS as DEFAULT_TESTS  # noqa: F401
+from .utils import Cycler
+from .utils import generate_lorem_ipsum
+from .utils import Joiner
+from .utils import Namespace
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
+# defaults for the parser / lexer
+BLOCK_START_STRING = "{%"
+BLOCK_END_STRING = "%}"
+VARIABLE_START_STRING = "{{"
+VARIABLE_END_STRING = "}}"
+COMMENT_START_STRING = "{#"
+COMMENT_END_STRING = "#}"
+LINE_STATEMENT_PREFIX: t.Optional[str] = None
+LINE_COMMENT_PREFIX: t.Optional[str] = None
+TRIM_BLOCKS = False
+LSTRIP_BLOCKS = False
+NEWLINE_SEQUENCE: "te.Literal['\\n', '\\r\\n', '\\r']" = "\n"
+KEEP_TRAILING_NEWLINE = False
+
+# default filters, tests and namespace
+
+DEFAULT_NAMESPACE = {
+    "range": range,
+    "dict": dict,
+    "lipsum": generate_lorem_ipsum,
+    "cycler": Cycler,
+    "joiner": Joiner,
+    "namespace": Namespace,
+}
+
+# default policies
+DEFAULT_POLICIES: t.Dict[str, t.Any] = {
+    "compiler.ascii_str": True,
+    "urlize.rel": "noopener",
+    "urlize.target": None,
+    "urlize.extra_schemes": None,
+    "truncate.leeway": 5,
+    "json.dumps_function": None,
+    "json.dumps_kwargs": {"sort_keys": True},
+    "ext.i18n.trimmed": False,
+}
diff --git a/venv/lib/python3.9/site-packages/jinja2/environment.py b/venv/lib/python3.9/site-packages/jinja2/environment.py
new file mode 100644
index 0000000..ea04e8b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/environment.py
@@ -0,0 +1,1667 @@
+"""Classes for managing templates and their runtime and compile time
+options.
+"""
+import os
+import typing
+import typing as t
+import weakref
+from collections import ChainMap
+from functools import lru_cache
+from functools import partial
+from functools import reduce
+from types import CodeType
+
+from markupsafe import Markup
+
+from . import nodes
+from .compiler import CodeGenerator
+from .compiler import generate
+from .defaults import BLOCK_END_STRING
+from .defaults import BLOCK_START_STRING
+from .defaults import COMMENT_END_STRING
+from .defaults import COMMENT_START_STRING
+from .defaults import DEFAULT_FILTERS
+from .defaults import DEFAULT_NAMESPACE
+from .defaults import DEFAULT_POLICIES
+from .defaults import DEFAULT_TESTS
+from .defaults import KEEP_TRAILING_NEWLINE
+from .defaults import LINE_COMMENT_PREFIX
+from .defaults import LINE_STATEMENT_PREFIX
+from .defaults import LSTRIP_BLOCKS
+from .defaults import NEWLINE_SEQUENCE
+from .defaults import TRIM_BLOCKS
+from .defaults import VARIABLE_END_STRING
+from .defaults import VARIABLE_START_STRING
+from .exceptions import TemplateNotFound
+from .exceptions import TemplateRuntimeError
+from .exceptions import TemplatesNotFound
+from .exceptions import TemplateSyntaxError
+from .exceptions import UndefinedError
+from .lexer import get_lexer
+from .lexer import Lexer
+from .lexer import TokenStream
+from .nodes import EvalContext
+from .parser import Parser
+from .runtime import Context
+from .runtime import new_context
+from .runtime import Undefined
+from .utils import _PassArg
+from .utils import concat
+from .utils import consume
+from .utils import import_string
+from .utils import internalcode
+from .utils import LRUCache
+from .utils import missing
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .bccache import BytecodeCache
+    from .ext import Extension
+    from .loaders import BaseLoader
+
+_env_bound = t.TypeVar("_env_bound", bound="Environment")
+
+
+# for direct template usage we have up to ten living environments
+@lru_cache(maxsize=10)
+def get_spontaneous_environment(cls: t.Type[_env_bound], *args: t.Any) -> _env_bound:
+    """Return a new spontaneous environment. A spontaneous environment
+    is used for templates created directly rather than through an
+    existing environment.
+
+    :param cls: Environment class to create.
+    :param args: Positional arguments passed to environment.
+    """
+    env = cls(*args)
+    env.shared = True
+    return env
+
+
+def create_cache(
+    size: int,
+) -> t.Optional[t.MutableMapping[t.Tuple[weakref.ref, str], "Template"]]:
+    """Return the cache class for the given size."""
+    if size == 0:
+        return None
+
+    if size < 0:
+        return {}
+
+    return LRUCache(size)  # type: ignore
+
+
+def copy_cache(
+    cache: t.Optional[t.MutableMapping],
+) -> t.Optional[t.MutableMapping[t.Tuple[weakref.ref, str], "Template"]]:
+    """Create an empty copy of the given cache."""
+    if cache is None:
+        return None
+
+    if type(cache) is dict:
+        return {}
+
+    return LRUCache(cache.capacity)  # type: ignore
+
+
+def load_extensions(
+    environment: "Environment",
+    extensions: t.Sequence[t.Union[str, t.Type["Extension"]]],
+) -> t.Dict[str, "Extension"]:
+    """Load the extensions from the list and bind it to the environment.
+    Returns a dict of instantiated extensions.
+    """
+    result = {}
+
+    for extension in extensions:
+        if isinstance(extension, str):
+            extension = t.cast(t.Type["Extension"], import_string(extension))
+
+        result[extension.identifier] = extension(environment)
+
+    return result
+
+
+def _environment_config_check(environment: "Environment") -> "Environment":
+    """Perform a sanity check on the environment."""
+    assert issubclass(
+        environment.undefined, Undefined
+    ), "'undefined' must be a subclass of 'jinja2.Undefined'."
+    assert (
+        environment.block_start_string
+        != environment.variable_start_string
+        != environment.comment_start_string
+    ), "block, variable and comment start strings must be different."
+    assert environment.newline_sequence in {
+        "\r",
+        "\r\n",
+        "\n",
+    }, "'newline_sequence' must be one of '\\n', '\\r\\n', or '\\r'."
+    return environment
+
+
+class Environment:
+    r"""The core component of Jinja is the `Environment`.  It contains
+    important shared variables like configuration, filters, tests,
+    globals and others.  Instances of this class may be modified if
+    they are not shared and if no template was loaded so far.
+    Modifications on environments after the first template was loaded
+    will lead to surprising effects and undefined behavior.
+
+    Here are the possible initialization parameters:
+
+        `block_start_string`
+            The string marking the beginning of a block.  Defaults to ``'{%'``.
+
+        `block_end_string`
+            The string marking the end of a block.  Defaults to ``'%}'``.
+
+        `variable_start_string`
+            The string marking the beginning of a print statement.
+            Defaults to ``'{{'``.
+
+        `variable_end_string`
+            The string marking the end of a print statement.  Defaults to
+            ``'}}'``.
+
+        `comment_start_string`
+            The string marking the beginning of a comment.  Defaults to ``'{#'``.
+
+        `comment_end_string`
+            The string marking the end of a comment.  Defaults to ``'#}'``.
+
+        `line_statement_prefix`
+            If given and a string, this will be used as prefix for line based
+            statements.  See also :ref:`line-statements`.
+
+        `line_comment_prefix`
+            If given and a string, this will be used as prefix for line based
+            comments.  See also :ref:`line-statements`.
+
+            .. versionadded:: 2.2
+
+        `trim_blocks`
+            If this is set to ``True`` the first newline after a block is
+            removed (block, not variable tag!).  Defaults to `False`.
+
+        `lstrip_blocks`
+            If this is set to ``True`` leading spaces and tabs are stripped
+            from the start of a line to a block.  Defaults to `False`.
+
+        `newline_sequence`
+            The sequence that starts a newline.  Must be one of ``'\r'``,
+            ``'\n'`` or ``'\r\n'``.  The default is ``'\n'`` which is a
+            useful default for Linux and OS X systems as well as web
+            applications.
+
+        `keep_trailing_newline`
+            Preserve the trailing newline when rendering templates.
+            The default is ``False``, which causes a single newline,
+            if present, to be stripped from the end of the template.
+
+            .. versionadded:: 2.7
+
+        `extensions`
+            List of Jinja extensions to use.  This can either be import paths
+            as strings or extension classes.  For more information have a
+            look at :ref:`the extensions documentation <jinja-extensions>`.
+
+        `optimized`
+            should the optimizer be enabled?  Default is ``True``.
+
+        `undefined`
+            :class:`Undefined` or a subclass of it that is used to represent
+            undefined values in the template.
+
+        `finalize`
+            A callable that can be used to process the result of a variable
+            expression before it is output.  For example one can convert
+            ``None`` implicitly into an empty string here.
+
+        `autoescape`
+            If set to ``True`` the XML/HTML autoescaping feature is enabled by
+            default.  For more details about autoescaping see
+            :class:`~markupsafe.Markup`.  As of Jinja 2.4 this can also
+            be a callable that is passed the template name and has to
+            return ``True`` or ``False`` depending on autoescape should be
+            enabled by default.
+
+            .. versionchanged:: 2.4
+               `autoescape` can now be a function
+
+        `loader`
+            The template loader for this environment.
+
+        `cache_size`
+            The size of the cache.  Per default this is ``400`` which means
+            that if more than 400 templates are loaded the loader will clean
+            out the least recently used template.  If the cache size is set to
+            ``0`` templates are recompiled all the time, if the cache size is
+            ``-1`` the cache will not be cleaned.
+
+            .. versionchanged:: 2.8
+               The cache size was increased to 400 from a low 50.
+
+        `auto_reload`
+            Some loaders load templates from locations where the template
+            sources may change (ie: file system or database).  If
+            ``auto_reload`` is set to ``True`` (default) every time a template is
+            requested the loader checks if the source changed and if yes, it
+            will reload the template.  For higher performance it's possible to
+            disable that.
+
+        `bytecode_cache`
+            If set to a bytecode cache object, this object will provide a
+            cache for the internal Jinja bytecode so that templates don't
+            have to be parsed if they were not changed.
+
+            See :ref:`bytecode-cache` for more information.
+
+        `enable_async`
+            If set to true this enables async template execution which
+            allows using async functions and generators.
+    """
+
+    #: if this environment is sandboxed.  Modifying this variable won't make
+    #: the environment sandboxed though.  For a real sandboxed environment
+    #: have a look at jinja2.sandbox.  This flag alone controls the code
+    #: generation by the compiler.
+    sandboxed = False
+
+    #: True if the environment is just an overlay
+    overlayed = False
+
+    #: the environment this environment is linked to if it is an overlay
+    linked_to: t.Optional["Environment"] = None
+
+    #: shared environments have this set to `True`.  A shared environment
+    #: must not be modified
+    shared = False
+
+    #: the class that is used for code generation.  See
+    #: :class:`~jinja2.compiler.CodeGenerator` for more information.
+    code_generator_class: t.Type["CodeGenerator"] = CodeGenerator
+
+    concat = "".join
+
+    #: the context class that is used for templates.  See
+    #: :class:`~jinja2.runtime.Context` for more information.
+    context_class: t.Type[Context] = Context
+
+    template_class: t.Type["Template"]
+
+    def __init__(
+        self,
+        block_start_string: str = BLOCK_START_STRING,
+        block_end_string: str = BLOCK_END_STRING,
+        variable_start_string: str = VARIABLE_START_STRING,
+        variable_end_string: str = VARIABLE_END_STRING,
+        comment_start_string: str = COMMENT_START_STRING,
+        comment_end_string: str = COMMENT_END_STRING,
+        line_statement_prefix: t.Optional[str] = LINE_STATEMENT_PREFIX,
+        line_comment_prefix: t.Optional[str] = LINE_COMMENT_PREFIX,
+        trim_blocks: bool = TRIM_BLOCKS,
+        lstrip_blocks: bool = LSTRIP_BLOCKS,
+        newline_sequence: "te.Literal['\\n', '\\r\\n', '\\r']" = NEWLINE_SEQUENCE,
+        keep_trailing_newline: bool = KEEP_TRAILING_NEWLINE,
+        extensions: t.Sequence[t.Union[str, t.Type["Extension"]]] = (),
+        optimized: bool = True,
+        undefined: t.Type[Undefined] = Undefined,
+        finalize: t.Optional[t.Callable[..., t.Any]] = None,
+        autoescape: t.Union[bool, t.Callable[[t.Optional[str]], bool]] = False,
+        loader: t.Optional["BaseLoader"] = None,
+        cache_size: int = 400,
+        auto_reload: bool = True,
+        bytecode_cache: t.Optional["BytecodeCache"] = None,
+        enable_async: bool = False,
+    ):
+        # !!Important notice!!
+        #   The constructor accepts quite a few arguments that should be
+        #   passed by keyword rather than position.  However it's important to
+        #   not change the order of arguments because it's used at least
+        #   internally in those cases:
+        #       -   spontaneous environments (i18n extension and Template)
+        #       -   unittests
+        #   If parameter changes are required only add parameters at the end
+        #   and don't change the arguments (or the defaults!) of the arguments
+        #   existing already.
+
+        # lexer / parser information
+        self.block_start_string = block_start_string
+        self.block_end_string = block_end_string
+        self.variable_start_string = variable_start_string
+        self.variable_end_string = variable_end_string
+        self.comment_start_string = comment_start_string
+        self.comment_end_string = comment_end_string
+        self.line_statement_prefix = line_statement_prefix
+        self.line_comment_prefix = line_comment_prefix
+        self.trim_blocks = trim_blocks
+        self.lstrip_blocks = lstrip_blocks
+        self.newline_sequence = newline_sequence
+        self.keep_trailing_newline = keep_trailing_newline
+
+        # runtime information
+        self.undefined: t.Type[Undefined] = undefined
+        self.optimized = optimized
+        self.finalize = finalize
+        self.autoescape = autoescape
+
+        # defaults
+        self.filters = DEFAULT_FILTERS.copy()
+        self.tests = DEFAULT_TESTS.copy()
+        self.globals = DEFAULT_NAMESPACE.copy()
+
+        # set the loader provided
+        self.loader = loader
+        self.cache = create_cache(cache_size)
+        self.bytecode_cache = bytecode_cache
+        self.auto_reload = auto_reload
+
+        # configurable policies
+        self.policies = DEFAULT_POLICIES.copy()
+
+        # load extensions
+        self.extensions = load_extensions(self, extensions)
+
+        self.is_async = enable_async
+        _environment_config_check(self)
+
+    def add_extension(self, extension: t.Union[str, t.Type["Extension"]]) -> None:
+        """Adds an extension after the environment was created.
+
+        .. versionadded:: 2.5
+        """
+        self.extensions.update(load_extensions(self, [extension]))
+
+    def extend(self, **attributes: t.Any) -> None:
+        """Add the items to the instance of the environment if they do not exist
+        yet.  This is used by :ref:`extensions <writing-extensions>` to register
+        callbacks and configuration values without breaking inheritance.
+        """
+        for key, value in attributes.items():
+            if not hasattr(self, key):
+                setattr(self, key, value)
+
+    def overlay(
+        self,
+        block_start_string: str = missing,
+        block_end_string: str = missing,
+        variable_start_string: str = missing,
+        variable_end_string: str = missing,
+        comment_start_string: str = missing,
+        comment_end_string: str = missing,
+        line_statement_prefix: t.Optional[str] = missing,
+        line_comment_prefix: t.Optional[str] = missing,
+        trim_blocks: bool = missing,
+        lstrip_blocks: bool = missing,
+        newline_sequence: "te.Literal['\\n', '\\r\\n', '\\r']" = missing,
+        keep_trailing_newline: bool = missing,
+        extensions: t.Sequence[t.Union[str, t.Type["Extension"]]] = missing,
+        optimized: bool = missing,
+        undefined: t.Type[Undefined] = missing,
+        finalize: t.Optional[t.Callable[..., t.Any]] = missing,
+        autoescape: t.Union[bool, t.Callable[[t.Optional[str]], bool]] = missing,
+        loader: t.Optional["BaseLoader"] = missing,
+        cache_size: int = missing,
+        auto_reload: bool = missing,
+        bytecode_cache: t.Optional["BytecodeCache"] = missing,
+        enable_async: bool = False,
+    ) -> "Environment":
+        """Create a new overlay environment that shares all the data with the
+        current environment except for cache and the overridden attributes.
+        Extensions cannot be removed for an overlayed environment.  An overlayed
+        environment automatically gets all the extensions of the environment it
+        is linked to plus optional extra extensions.
+
+        Creating overlays should happen after the initial environment was set
+        up completely.  Not all attributes are truly linked, some are just
+        copied over so modifications on the original environment may not shine
+        through.
+
+        .. versionchanged:: 3.1.2
+            Added the ``newline_sequence``,, ``keep_trailing_newline``,
+            and ``enable_async`` parameters to match ``__init__``.
+        """
+        args = dict(locals())
+        del args["self"], args["cache_size"], args["extensions"], args["enable_async"]
+
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.overlayed = True
+        rv.linked_to = self
+
+        for key, value in args.items():
+            if value is not missing:
+                setattr(rv, key, value)
+
+        if cache_size is not missing:
+            rv.cache = create_cache(cache_size)
+        else:
+            rv.cache = copy_cache(self.cache)
+
+        rv.extensions = {}
+        for key, value in self.extensions.items():
+            rv.extensions[key] = value.bind(rv)
+        if extensions is not missing:
+            rv.extensions.update(load_extensions(rv, extensions))
+
+        if enable_async is not missing:
+            rv.is_async = enable_async
+
+        return _environment_config_check(rv)
+
+    @property
+    def lexer(self) -> Lexer:
+        """The lexer for this environment."""
+        return get_lexer(self)
+
+    def iter_extensions(self) -> t.Iterator["Extension"]:
+        """Iterates over the extensions by priority."""
+        return iter(sorted(self.extensions.values(), key=lambda x: x.priority))
+
+    def getitem(
+        self, obj: t.Any, argument: t.Union[str, t.Any]
+    ) -> t.Union[t.Any, Undefined]:
+        """Get an item or attribute of an object but prefer the item."""
+        try:
+            return obj[argument]
+        except (AttributeError, TypeError, LookupError):
+            if isinstance(argument, str):
+                try:
+                    attr = str(argument)
+                except Exception:
+                    pass
+                else:
+                    try:
+                        return getattr(obj, attr)
+                    except AttributeError:
+                        pass
+            return self.undefined(obj=obj, name=argument)
+
+    def getattr(self, obj: t.Any, attribute: str) -> t.Any:
+        """Get an item or attribute of an object but prefer the attribute.
+        Unlike :meth:`getitem` the attribute *must* be a string.
+        """
+        try:
+            return getattr(obj, attribute)
+        except AttributeError:
+            pass
+        try:
+            return obj[attribute]
+        except (TypeError, LookupError, AttributeError):
+            return self.undefined(obj=obj, name=attribute)
+
+    def _filter_test_common(
+        self,
+        name: t.Union[str, Undefined],
+        value: t.Any,
+        args: t.Optional[t.Sequence[t.Any]],
+        kwargs: t.Optional[t.Mapping[str, t.Any]],
+        context: t.Optional[Context],
+        eval_ctx: t.Optional[EvalContext],
+        is_filter: bool,
+    ) -> t.Any:
+        if is_filter:
+            env_map = self.filters
+            type_name = "filter"
+        else:
+            env_map = self.tests
+            type_name = "test"
+
+        func = env_map.get(name)  # type: ignore
+
+        if func is None:
+            msg = f"No {type_name} named {name!r}."
+
+            if isinstance(name, Undefined):
+                try:
+                    name._fail_with_undefined_error()
+                except Exception as e:
+                    msg = f"{msg} ({e}; did you forget to quote the callable name?)"
+
+            raise TemplateRuntimeError(msg)
+
+        args = [value, *(args if args is not None else ())]
+        kwargs = kwargs if kwargs is not None else {}
+        pass_arg = _PassArg.from_obj(func)
+
+        if pass_arg is _PassArg.context:
+            if context is None:
+                raise TemplateRuntimeError(
+                    f"Attempted to invoke a context {type_name} without context."
+                )
+
+            args.insert(0, context)
+        elif pass_arg is _PassArg.eval_context:
+            if eval_ctx is None:
+                if context is not None:
+                    eval_ctx = context.eval_ctx
+                else:
+                    eval_ctx = EvalContext(self)
+
+            args.insert(0, eval_ctx)
+        elif pass_arg is _PassArg.environment:
+            args.insert(0, self)
+
+        return func(*args, **kwargs)
+
+    def call_filter(
+        self,
+        name: str,
+        value: t.Any,
+        args: t.Optional[t.Sequence[t.Any]] = None,
+        kwargs: t.Optional[t.Mapping[str, t.Any]] = None,
+        context: t.Optional[Context] = None,
+        eval_ctx: t.Optional[EvalContext] = None,
+    ) -> t.Any:
+        """Invoke a filter on a value the same way the compiler does.
+
+        This might return a coroutine if the filter is running from an
+        environment in async mode and the filter supports async
+        execution. It's your responsibility to await this if needed.
+
+        .. versionadded:: 2.7
+        """
+        return self._filter_test_common(
+            name, value, args, kwargs, context, eval_ctx, True
+        )
+
+    def call_test(
+        self,
+        name: str,
+        value: t.Any,
+        args: t.Optional[t.Sequence[t.Any]] = None,
+        kwargs: t.Optional[t.Mapping[str, t.Any]] = None,
+        context: t.Optional[Context] = None,
+        eval_ctx: t.Optional[EvalContext] = None,
+    ) -> t.Any:
+        """Invoke a test on a value the same way the compiler does.
+
+        This might return a coroutine if the test is running from an
+        environment in async mode and the test supports async execution.
+        It's your responsibility to await this if needed.
+
+        .. versionchanged:: 3.0
+            Tests support ``@pass_context``, etc. decorators. Added
+            the ``context`` and ``eval_ctx`` parameters.
+
+        .. versionadded:: 2.7
+        """
+        return self._filter_test_common(
+            name, value, args, kwargs, context, eval_ctx, False
+        )
+
+    @internalcode
+    def parse(
+        self,
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> nodes.Template:
+        """Parse the sourcecode and return the abstract syntax tree.  This
+        tree of nodes is used by the compiler to convert the template into
+        executable source- or bytecode.  This is useful for debugging or to
+        extract information from templates.
+
+        If you are :ref:`developing Jinja extensions <writing-extensions>`
+        this gives you a good overview of the node tree generated.
+        """
+        try:
+            return self._parse(source, name, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source)
+
+    def _parse(
+        self, source: str, name: t.Optional[str], filename: t.Optional[str]
+    ) -> nodes.Template:
+        """Internal parsing function used by `parse` and `compile`."""
+        return Parser(self, source, name, filename).parse()
+
+    def lex(
+        self,
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> t.Iterator[t.Tuple[int, str, str]]:
+        """Lex the given sourcecode and return a generator that yields
+        tokens as tuples in the form ``(lineno, token_type, value)``.
+        This can be useful for :ref:`extension development <writing-extensions>`
+        and debugging templates.
+
+        This does not perform preprocessing.  If you want the preprocessing
+        of the extensions to be applied you have to filter source through
+        the :meth:`preprocess` method.
+        """
+        source = str(source)
+        try:
+            return self.lexer.tokeniter(source, name, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source)
+
+    def preprocess(
+        self,
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> str:
+        """Preprocesses the source with all extensions.  This is automatically
+        called for all parsing and compiling methods but *not* for :meth:`lex`
+        because there you usually only want the actual source tokenized.
+        """
+        return reduce(
+            lambda s, e: e.preprocess(s, name, filename),
+            self.iter_extensions(),
+            str(source),
+        )
+
+    def _tokenize(
+        self,
+        source: str,
+        name: t.Optional[str],
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> TokenStream:
+        """Called by the parser to do the preprocessing and filtering
+        for all the extensions.  Returns a :class:`~jinja2.lexer.TokenStream`.
+        """
+        source = self.preprocess(source, name, filename)
+        stream = self.lexer.tokenize(source, name, filename, state)
+
+        for ext in self.iter_extensions():
+            stream = ext.filter_stream(stream)  # type: ignore
+
+            if not isinstance(stream, TokenStream):
+                stream = TokenStream(stream, name, filename)  # type: ignore
+
+        return stream
+
+    def _generate(
+        self,
+        source: nodes.Template,
+        name: t.Optional[str],
+        filename: t.Optional[str],
+        defer_init: bool = False,
+    ) -> str:
+        """Internal hook that can be overridden to hook a different generate
+        method in.
+
+        .. versionadded:: 2.5
+        """
+        return generate(  # type: ignore
+            source,
+            self,
+            name,
+            filename,
+            defer_init=defer_init,
+            optimized=self.optimized,
+        )
+
+    def _compile(self, source: str, filename: str) -> CodeType:
+        """Internal hook that can be overridden to hook a different compile
+        method in.
+
+        .. versionadded:: 2.5
+        """
+        return compile(source, filename, "exec")  # type: ignore
+
+    @typing.overload
+    def compile(  # type: ignore
+        self,
+        source: t.Union[str, nodes.Template],
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        raw: "te.Literal[False]" = False,
+        defer_init: bool = False,
+    ) -> CodeType:
+        ...
+
+    @typing.overload
+    def compile(
+        self,
+        source: t.Union[str, nodes.Template],
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        raw: "te.Literal[True]" = ...,
+        defer_init: bool = False,
+    ) -> str:
+        ...
+
+    @internalcode
+    def compile(
+        self,
+        source: t.Union[str, nodes.Template],
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        raw: bool = False,
+        defer_init: bool = False,
+    ) -> t.Union[str, CodeType]:
+        """Compile a node or template source code.  The `name` parameter is
+        the load name of the template after it was joined using
+        :meth:`join_path` if necessary, not the filename on the file system.
+        the `filename` parameter is the estimated filename of the template on
+        the file system.  If the template came from a database or memory this
+        can be omitted.
+
+        The return value of this method is a python code object.  If the `raw`
+        parameter is `True` the return value will be a string with python
+        code equivalent to the bytecode returned otherwise.  This method is
+        mainly used internally.
+
+        `defer_init` is use internally to aid the module code generator.  This
+        causes the generated code to be able to import without the global
+        environment variable to be set.
+
+        .. versionadded:: 2.4
+           `defer_init` parameter added.
+        """
+        source_hint = None
+        try:
+            if isinstance(source, str):
+                source_hint = source
+                source = self._parse(source, name, filename)
+            source = self._generate(source, name, filename, defer_init=defer_init)
+            if raw:
+                return source
+            if filename is None:
+                filename = "<template>"
+            return self._compile(source, filename)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source_hint)
+
+    def compile_expression(
+        self, source: str, undefined_to_none: bool = True
+    ) -> "TemplateExpression":
+        """A handy helper method that returns a callable that accepts keyword
+        arguments that appear as variables in the expression.  If called it
+        returns the result of the expression.
+
+        This is useful if applications want to use the same rules as Jinja
+        in template "configuration files" or similar situations.
+
+        Example usage:
+
+        >>> env = Environment()
+        >>> expr = env.compile_expression('foo == 42')
+        >>> expr(foo=23)
+        False
+        >>> expr(foo=42)
+        True
+
+        Per default the return value is converted to `None` if the
+        expression returns an undefined value.  This can be changed
+        by setting `undefined_to_none` to `False`.
+
+        >>> env.compile_expression('var')() is None
+        True
+        >>> env.compile_expression('var', undefined_to_none=False)()
+        Undefined
+
+        .. versionadded:: 2.1
+        """
+        parser = Parser(self, source, state="variable")
+        try:
+            expr = parser.parse_expression()
+            if not parser.stream.eos:
+                raise TemplateSyntaxError(
+                    "chunk after expression", parser.stream.current.lineno, None, None
+                )
+            expr.set_environment(self)
+        except TemplateSyntaxError:
+            self.handle_exception(source=source)
+
+        body = [nodes.Assign(nodes.Name("result", "store"), expr, lineno=1)]
+        template = self.from_string(nodes.Template(body, lineno=1))
+        return TemplateExpression(template, undefined_to_none)
+
+    def compile_templates(
+        self,
+        target: t.Union[str, os.PathLike],
+        extensions: t.Optional[t.Collection[str]] = None,
+        filter_func: t.Optional[t.Callable[[str], bool]] = None,
+        zip: t.Optional[str] = "deflated",
+        log_function: t.Optional[t.Callable[[str], None]] = None,
+        ignore_errors: bool = True,
+    ) -> None:
+        """Finds all the templates the loader can find, compiles them
+        and stores them in `target`.  If `zip` is `None`, instead of in a
+        zipfile, the templates will be stored in a directory.
+        By default a deflate zip algorithm is used. To switch to
+        the stored algorithm, `zip` can be set to ``'stored'``.
+
+        `extensions` and `filter_func` are passed to :meth:`list_templates`.
+        Each template returned will be compiled to the target folder or
+        zipfile.
+
+        By default template compilation errors are ignored.  In case a
+        log function is provided, errors are logged.  If you want template
+        syntax errors to abort the compilation you can set `ignore_errors`
+        to `False` and you will get an exception on syntax errors.
+
+        .. versionadded:: 2.4
+        """
+        from .loaders import ModuleLoader
+
+        if log_function is None:
+
+            def log_function(x: str) -> None:
+                pass
+
+        assert log_function is not None
+        assert self.loader is not None, "No loader configured."
+
+        def write_file(filename: str, data: str) -> None:
+            if zip:
+                info = ZipInfo(filename)
+                info.external_attr = 0o755 << 16
+                zip_file.writestr(info, data)
+            else:
+                with open(os.path.join(target, filename), "wb") as f:
+                    f.write(data.encode("utf8"))
+
+        if zip is not None:
+            from zipfile import ZipFile, ZipInfo, ZIP_DEFLATED, ZIP_STORED
+
+            zip_file = ZipFile(
+                target, "w", dict(deflated=ZIP_DEFLATED, stored=ZIP_STORED)[zip]
+            )
+            log_function(f"Compiling into Zip archive {target!r}")
+        else:
+            if not os.path.isdir(target):
+                os.makedirs(target)
+            log_function(f"Compiling into folder {target!r}")
+
+        try:
+            for name in self.list_templates(extensions, filter_func):
+                source, filename, _ = self.loader.get_source(self, name)
+                try:
+                    code = self.compile(source, name, filename, True, True)
+                except TemplateSyntaxError as e:
+                    if not ignore_errors:
+                        raise
+                    log_function(f'Could not compile "{name}": {e}')
+                    continue
+
+                filename = ModuleLoader.get_module_filename(name)
+
+                write_file(filename, code)
+                log_function(f'Compiled "{name}" as {filename}')
+        finally:
+            if zip:
+                zip_file.close()
+
+        log_function("Finished compiling templates")
+
+    def list_templates(
+        self,
+        extensions: t.Optional[t.Collection[str]] = None,
+        filter_func: t.Optional[t.Callable[[str], bool]] = None,
+    ) -> t.List[str]:
+        """Returns a list of templates for this environment.  This requires
+        that the loader supports the loader's
+        :meth:`~BaseLoader.list_templates` method.
+
+        If there are other files in the template folder besides the
+        actual templates, the returned list can be filtered.  There are two
+        ways: either `extensions` is set to a list of file extensions for
+        templates, or a `filter_func` can be provided which is a callable that
+        is passed a template name and should return `True` if it should end up
+        in the result list.
+
+        If the loader does not support that, a :exc:`TypeError` is raised.
+
+        .. versionadded:: 2.4
+        """
+        assert self.loader is not None, "No loader configured."
+        names = self.loader.list_templates()
+
+        if extensions is not None:
+            if filter_func is not None:
+                raise TypeError(
+                    "either extensions or filter_func can be passed, but not both"
+                )
+
+            def filter_func(x: str) -> bool:
+                return "." in x and x.rsplit(".", 1)[1] in extensions  # type: ignore
+
+        if filter_func is not None:
+            names = [name for name in names if filter_func(name)]
+
+        return names
+
+    def handle_exception(self, source: t.Optional[str] = None) -> "te.NoReturn":
+        """Exception handling helper.  This is used internally to either raise
+        rewritten exceptions or return a rendered traceback for the template.
+        """
+        from .debug import rewrite_traceback_stack
+
+        raise rewrite_traceback_stack(source=source)
+
+    def join_path(self, template: str, parent: str) -> str:
+        """Join a template with the parent.  By default all the lookups are
+        relative to the loader root so this method returns the `template`
+        parameter unchanged, but if the paths should be relative to the
+        parent template, this function can be used to calculate the real
+        template name.
+
+        Subclasses may override this method and implement template path
+        joining here.
+        """
+        return template
+
+    @internalcode
+    def _load_template(
+        self, name: str, globals: t.Optional[t.MutableMapping[str, t.Any]]
+    ) -> "Template":
+        if self.loader is None:
+            raise TypeError("no loader for this environment specified")
+        cache_key = (weakref.ref(self.loader), name)
+        if self.cache is not None:
+            template = self.cache.get(cache_key)
+            if template is not None and (
+                not self.auto_reload or template.is_up_to_date
+            ):
+                # template.globals is a ChainMap, modifying it will only
+                # affect the template, not the environment globals.
+                if globals:
+                    template.globals.update(globals)
+
+                return template
+
+        template = self.loader.load(self, name, self.make_globals(globals))
+
+        if self.cache is not None:
+            self.cache[cache_key] = template
+        return template
+
+    @internalcode
+    def get_template(
+        self,
+        name: t.Union[str, "Template"],
+        parent: t.Optional[str] = None,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        """Load a template by name with :attr:`loader` and return a
+        :class:`Template`. If the template does not exist a
+        :exc:`TemplateNotFound` exception is raised.
+
+        :param name: Name of the template to load. When loading
+            templates from the filesystem, "/" is used as the path
+            separator, even on Windows.
+        :param parent: The name of the parent template importing this
+            template. :meth:`join_path` can be used to implement name
+            transformations with this.
+        :param globals: Extend the environment :attr:`globals` with
+            these extra variables available for all renders of this
+            template. If the template has already been loaded and
+            cached, its globals are updated with any new items.
+
+        .. versionchanged:: 3.0
+            If a template is loaded from cache, ``globals`` will update
+            the template's globals instead of ignoring the new values.
+
+        .. versionchanged:: 2.4
+            If ``name`` is a :class:`Template` object it is returned
+            unchanged.
+        """
+        if isinstance(name, Template):
+            return name
+        if parent is not None:
+            name = self.join_path(name, parent)
+
+        return self._load_template(name, globals)
+
+    @internalcode
+    def select_template(
+        self,
+        names: t.Iterable[t.Union[str, "Template"]],
+        parent: t.Optional[str] = None,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        """Like :meth:`get_template`, but tries loading multiple names.
+        If none of the names can be loaded a :exc:`TemplatesNotFound`
+        exception is raised.
+
+        :param names: List of template names to try loading in order.
+        :param parent: The name of the parent template importing this
+            template. :meth:`join_path` can be used to implement name
+            transformations with this.
+        :param globals: Extend the environment :attr:`globals` with
+            these extra variables available for all renders of this
+            template. If the template has already been loaded and
+            cached, its globals are updated with any new items.
+
+        .. versionchanged:: 3.0
+            If a template is loaded from cache, ``globals`` will update
+            the template's globals instead of ignoring the new values.
+
+        .. versionchanged:: 2.11
+            If ``names`` is :class:`Undefined`, an :exc:`UndefinedError`
+            is raised instead. If no templates were found and ``names``
+            contains :class:`Undefined`, the message is more helpful.
+
+        .. versionchanged:: 2.4
+            If ``names`` contains a :class:`Template` object it is
+            returned unchanged.
+
+        .. versionadded:: 2.3
+        """
+        if isinstance(names, Undefined):
+            names._fail_with_undefined_error()
+
+        if not names:
+            raise TemplatesNotFound(
+                message="Tried to select from an empty list of templates."
+            )
+
+        for name in names:
+            if isinstance(name, Template):
+                return name
+            if parent is not None:
+                name = self.join_path(name, parent)
+            try:
+                return self._load_template(name, globals)
+            except (TemplateNotFound, UndefinedError):
+                pass
+        raise TemplatesNotFound(names)  # type: ignore
+
+    @internalcode
+    def get_or_select_template(
+        self,
+        template_name_or_list: t.Union[
+            str, "Template", t.List[t.Union[str, "Template"]]
+        ],
+        parent: t.Optional[str] = None,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        """Use :meth:`select_template` if an iterable of template names
+        is given, or :meth:`get_template` if one name is given.
+
+        .. versionadded:: 2.3
+        """
+        if isinstance(template_name_or_list, (str, Undefined)):
+            return self.get_template(template_name_or_list, parent, globals)
+        elif isinstance(template_name_or_list, Template):
+            return template_name_or_list
+        return self.select_template(template_name_or_list, parent, globals)
+
+    def from_string(
+        self,
+        source: t.Union[str, nodes.Template],
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+        template_class: t.Optional[t.Type["Template"]] = None,
+    ) -> "Template":
+        """Load a template from a source string without using
+        :attr:`loader`.
+
+        :param source: Jinja source to compile into a template.
+        :param globals: Extend the environment :attr:`globals` with
+            these extra variables available for all renders of this
+            template. If the template has already been loaded and
+            cached, its globals are updated with any new items.
+        :param template_class: Return an instance of this
+            :class:`Template` class.
+        """
+        gs = self.make_globals(globals)
+        cls = template_class or self.template_class
+        return cls.from_code(self, self.compile(source), gs, None)
+
+    def make_globals(
+        self, d: t.Optional[t.MutableMapping[str, t.Any]]
+    ) -> t.MutableMapping[str, t.Any]:
+        """Make the globals map for a template. Any given template
+        globals overlay the environment :attr:`globals`.
+
+        Returns a :class:`collections.ChainMap`. This allows any changes
+        to a template's globals to only affect that template, while
+        changes to the environment's globals are still reflected.
+        However, avoid modifying any globals after a template is loaded.
+
+        :param d: Dict of template-specific globals.
+
+        .. versionchanged:: 3.0
+            Use :class:`collections.ChainMap` to always prevent mutating
+            environment globals.
+        """
+        if d is None:
+            d = {}
+
+        return ChainMap(d, self.globals)
+
+
+class Template:
+    """A compiled template that can be rendered.
+
+    Use the methods on :class:`Environment` to create or load templates.
+    The environment is used to configure how templates are compiled and
+    behave.
+
+    It is also possible to create a template object directly. This is
+    not usually recommended. The constructor takes most of the same
+    arguments as :class:`Environment`. All templates created with the
+    same environment arguments share the same ephemeral ``Environment``
+    instance behind the scenes.
+
+    A template object should be considered immutable. Modifications on
+    the object are not supported.
+    """
+
+    #: Type of environment to create when creating a template directly
+    #: rather than through an existing environment.
+    environment_class: t.Type[Environment] = Environment
+
+    environment: Environment
+    globals: t.MutableMapping[str, t.Any]
+    name: t.Optional[str]
+    filename: t.Optional[str]
+    blocks: t.Dict[str, t.Callable[[Context], t.Iterator[str]]]
+    root_render_func: t.Callable[[Context], t.Iterator[str]]
+    _module: t.Optional["TemplateModule"]
+    _debug_info: str
+    _uptodate: t.Optional[t.Callable[[], bool]]
+
+    def __new__(
+        cls,
+        source: t.Union[str, nodes.Template],
+        block_start_string: str = BLOCK_START_STRING,
+        block_end_string: str = BLOCK_END_STRING,
+        variable_start_string: str = VARIABLE_START_STRING,
+        variable_end_string: str = VARIABLE_END_STRING,
+        comment_start_string: str = COMMENT_START_STRING,
+        comment_end_string: str = COMMENT_END_STRING,
+        line_statement_prefix: t.Optional[str] = LINE_STATEMENT_PREFIX,
+        line_comment_prefix: t.Optional[str] = LINE_COMMENT_PREFIX,
+        trim_blocks: bool = TRIM_BLOCKS,
+        lstrip_blocks: bool = LSTRIP_BLOCKS,
+        newline_sequence: "te.Literal['\\n', '\\r\\n', '\\r']" = NEWLINE_SEQUENCE,
+        keep_trailing_newline: bool = KEEP_TRAILING_NEWLINE,
+        extensions: t.Sequence[t.Union[str, t.Type["Extension"]]] = (),
+        optimized: bool = True,
+        undefined: t.Type[Undefined] = Undefined,
+        finalize: t.Optional[t.Callable[..., t.Any]] = None,
+        autoescape: t.Union[bool, t.Callable[[t.Optional[str]], bool]] = False,
+        enable_async: bool = False,
+    ) -> t.Any:  # it returns a `Template`, but this breaks the sphinx build...
+        env = get_spontaneous_environment(
+            cls.environment_class,  # type: ignore
+            block_start_string,
+            block_end_string,
+            variable_start_string,
+            variable_end_string,
+            comment_start_string,
+            comment_end_string,
+            line_statement_prefix,
+            line_comment_prefix,
+            trim_blocks,
+            lstrip_blocks,
+            newline_sequence,
+            keep_trailing_newline,
+            frozenset(extensions),
+            optimized,
+            undefined,  # type: ignore
+            finalize,
+            autoescape,
+            None,
+            0,
+            False,
+            None,
+            enable_async,
+        )
+        return env.from_string(source, template_class=cls)
+
+    @classmethod
+    def from_code(
+        cls,
+        environment: Environment,
+        code: CodeType,
+        globals: t.MutableMapping[str, t.Any],
+        uptodate: t.Optional[t.Callable[[], bool]] = None,
+    ) -> "Template":
+        """Creates a template object from compiled code and the globals.  This
+        is used by the loaders and environment to create a template object.
+        """
+        namespace = {"environment": environment, "__file__": code.co_filename}
+        exec(code, namespace)
+        rv = cls._from_namespace(environment, namespace, globals)
+        rv._uptodate = uptodate
+        return rv
+
+    @classmethod
+    def from_module_dict(
+        cls,
+        environment: Environment,
+        module_dict: t.MutableMapping[str, t.Any],
+        globals: t.MutableMapping[str, t.Any],
+    ) -> "Template":
+        """Creates a template object from a module.  This is used by the
+        module loader to create a template object.
+
+        .. versionadded:: 2.4
+        """
+        return cls._from_namespace(environment, module_dict, globals)
+
+    @classmethod
+    def _from_namespace(
+        cls,
+        environment: Environment,
+        namespace: t.MutableMapping[str, t.Any],
+        globals: t.MutableMapping[str, t.Any],
+    ) -> "Template":
+        t: "Template" = object.__new__(cls)
+        t.environment = environment
+        t.globals = globals
+        t.name = namespace["name"]
+        t.filename = namespace["__file__"]
+        t.blocks = namespace["blocks"]
+
+        # render function and module
+        t.root_render_func = namespace["root"]  # type: ignore
+        t._module = None
+
+        # debug and loader helpers
+        t._debug_info = namespace["debug_info"]
+        t._uptodate = None
+
+        # store the reference
+        namespace["environment"] = environment
+        namespace["__jinja_template__"] = t
+
+        return t
+
+    def render(self, *args: t.Any, **kwargs: t.Any) -> str:
+        """This method accepts the same arguments as the `dict` constructor:
+        A dict, a dict subclass or some keyword arguments.  If no arguments
+        are given the context will be empty.  These two calls do the same::
+
+            template.render(knights='that say nih')
+            template.render({'knights': 'that say nih'})
+
+        This will return the rendered template as a string.
+        """
+        if self.environment.is_async:
+            import asyncio
+
+            close = False
+
+            try:
+                loop = asyncio.get_running_loop()
+            except RuntimeError:
+                loop = asyncio.new_event_loop()
+                close = True
+
+            try:
+                return loop.run_until_complete(self.render_async(*args, **kwargs))
+            finally:
+                if close:
+                    loop.close()
+
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            return self.environment.concat(self.root_render_func(ctx))  # type: ignore
+        except Exception:
+            self.environment.handle_exception()
+
+    async def render_async(self, *args: t.Any, **kwargs: t.Any) -> str:
+        """This works similar to :meth:`render` but returns a coroutine
+        that when awaited returns the entire rendered template string.  This
+        requires the async feature to be enabled.
+
+        Example usage::
+
+            await template.render_async(knights='that say nih; asynchronously')
+        """
+        if not self.environment.is_async:
+            raise RuntimeError(
+                "The environment was not created with async mode enabled."
+            )
+
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            return self.environment.concat(  # type: ignore
+                [n async for n in self.root_render_func(ctx)]  # type: ignore
+            )
+        except Exception:
+            return self.environment.handle_exception()
+
+    def stream(self, *args: t.Any, **kwargs: t.Any) -> "TemplateStream":
+        """Works exactly like :meth:`generate` but returns a
+        :class:`TemplateStream`.
+        """
+        return TemplateStream(self.generate(*args, **kwargs))
+
+    def generate(self, *args: t.Any, **kwargs: t.Any) -> t.Iterator[str]:
+        """For very large templates it can be useful to not render the whole
+        template at once but evaluate each statement after another and yield
+        piece for piece.  This method basically does exactly that and returns
+        a generator that yields one item after another as strings.
+
+        It accepts the same arguments as :meth:`render`.
+        """
+        if self.environment.is_async:
+            import asyncio
+
+            async def to_list() -> t.List[str]:
+                return [x async for x in self.generate_async(*args, **kwargs)]
+
+            yield from asyncio.run(to_list())
+            return
+
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            yield from self.root_render_func(ctx)  # type: ignore
+        except Exception:
+            yield self.environment.handle_exception()
+
+    async def generate_async(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> t.AsyncIterator[str]:
+        """An async version of :meth:`generate`.  Works very similarly but
+        returns an async iterator instead.
+        """
+        if not self.environment.is_async:
+            raise RuntimeError(
+                "The environment was not created with async mode enabled."
+            )
+
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            async for event in self.root_render_func(ctx):  # type: ignore
+                yield event
+        except Exception:
+            yield self.environment.handle_exception()
+
+    def new_context(
+        self,
+        vars: t.Optional[t.Dict[str, t.Any]] = None,
+        shared: bool = False,
+        locals: t.Optional[t.Mapping[str, t.Any]] = None,
+    ) -> Context:
+        """Create a new :class:`Context` for this template.  The vars
+        provided will be passed to the template.  Per default the globals
+        are added to the context.  If shared is set to `True` the data
+        is passed as is to the context without adding the globals.
+
+        `locals` can be a dict of local variables for internal usage.
+        """
+        return new_context(
+            self.environment, self.name, self.blocks, vars, shared, self.globals, locals
+        )
+
+    def make_module(
+        self,
+        vars: t.Optional[t.Dict[str, t.Any]] = None,
+        shared: bool = False,
+        locals: t.Optional[t.Mapping[str, t.Any]] = None,
+    ) -> "TemplateModule":
+        """This method works like the :attr:`module` attribute when called
+        without arguments but it will evaluate the template on every call
+        rather than caching it.  It's also possible to provide
+        a dict which is then used as context.  The arguments are the same
+        as for the :meth:`new_context` method.
+        """
+        ctx = self.new_context(vars, shared, locals)
+        return TemplateModule(self, ctx)
+
+    async def make_module_async(
+        self,
+        vars: t.Optional[t.Dict[str, t.Any]] = None,
+        shared: bool = False,
+        locals: t.Optional[t.Mapping[str, t.Any]] = None,
+    ) -> "TemplateModule":
+        """As template module creation can invoke template code for
+        asynchronous executions this method must be used instead of the
+        normal :meth:`make_module` one.  Likewise the module attribute
+        becomes unavailable in async mode.
+        """
+        ctx = self.new_context(vars, shared, locals)
+        return TemplateModule(
+            self, ctx, [x async for x in self.root_render_func(ctx)]  # type: ignore
+        )
+
+    @internalcode
+    def _get_default_module(self, ctx: t.Optional[Context] = None) -> "TemplateModule":
+        """If a context is passed in, this means that the template was
+        imported. Imported templates have access to the current
+        template's globals by default, but they can only be accessed via
+        the context during runtime.
+
+        If there are new globals, we need to create a new module because
+        the cached module is already rendered and will not have access
+        to globals from the current context. This new module is not
+        cached because the template can be imported elsewhere, and it
+        should have access to only the current template's globals.
+        """
+        if self.environment.is_async:
+            raise RuntimeError("Module is not available in async mode.")
+
+        if ctx is not None:
+            keys = ctx.globals_keys - self.globals.keys()
+
+            if keys:
+                return self.make_module({k: ctx.parent[k] for k in keys})
+
+        if self._module is None:
+            self._module = self.make_module()
+
+        return self._module
+
+    async def _get_default_module_async(
+        self, ctx: t.Optional[Context] = None
+    ) -> "TemplateModule":
+        if ctx is not None:
+            keys = ctx.globals_keys - self.globals.keys()
+
+            if keys:
+                return await self.make_module_async({k: ctx.parent[k] for k in keys})
+
+        if self._module is None:
+            self._module = await self.make_module_async()
+
+        return self._module
+
+    @property
+    def module(self) -> "TemplateModule":
+        """The template as module.  This is used for imports in the
+        template runtime but is also useful if one wants to access
+        exported template variables from the Python layer:
+
+        >>> t = Template('{% macro foo() %}42{% endmacro %}23')
+        >>> str(t.module)
+        '23'
+        >>> t.module.foo() == u'42'
+        True
+
+        This attribute is not available if async mode is enabled.
+        """
+        return self._get_default_module()
+
+    def get_corresponding_lineno(self, lineno: int) -> int:
+        """Return the source line number of a line number in the
+        generated bytecode as they are not in sync.
+        """
+        for template_line, code_line in reversed(self.debug_info):
+            if code_line <= lineno:
+                return template_line
+        return 1
+
+    @property
+    def is_up_to_date(self) -> bool:
+        """If this variable is `False` there is a newer version available."""
+        if self._uptodate is None:
+            return True
+        return self._uptodate()
+
+    @property
+    def debug_info(self) -> t.List[t.Tuple[int, int]]:
+        """The debug info mapping."""
+        if self._debug_info:
+            return [
+                tuple(map(int, x.split("=")))  # type: ignore
+                for x in self._debug_info.split("&")
+            ]
+
+        return []
+
+    def __repr__(self) -> str:
+        if self.name is None:
+            name = f"memory:{id(self):x}"
+        else:
+            name = repr(self.name)
+        return f"<{type(self).__name__} {name}>"
+
+
+class TemplateModule:
+    """Represents an imported template.  All the exported names of the
+    template are available as attributes on this object.  Additionally
+    converting it into a string renders the contents.
+    """
+
+    def __init__(
+        self,
+        template: Template,
+        context: Context,
+        body_stream: t.Optional[t.Iterable[str]] = None,
+    ) -> None:
+        if body_stream is None:
+            if context.environment.is_async:
+                raise RuntimeError(
+                    "Async mode requires a body stream to be passed to"
+                    " a template module. Use the async methods of the"
+                    " API you are using."
+                )
+
+            body_stream = list(template.root_render_func(context))  # type: ignore
+
+        self._body_stream = body_stream
+        self.__dict__.update(context.get_exported())
+        self.__name__ = template.name
+
+    def __html__(self) -> Markup:
+        return Markup(concat(self._body_stream))
+
+    def __str__(self) -> str:
+        return concat(self._body_stream)
+
+    def __repr__(self) -> str:
+        if self.__name__ is None:
+            name = f"memory:{id(self):x}"
+        else:
+            name = repr(self.__name__)
+        return f"<{type(self).__name__} {name}>"
+
+
+class TemplateExpression:
+    """The :meth:`jinja2.Environment.compile_expression` method returns an
+    instance of this object.  It encapsulates the expression-like access
+    to the template with an expression it wraps.
+    """
+
+    def __init__(self, template: Template, undefined_to_none: bool) -> None:
+        self._template = template
+        self._undefined_to_none = undefined_to_none
+
+    def __call__(self, *args: t.Any, **kwargs: t.Any) -> t.Optional[t.Any]:
+        context = self._template.new_context(dict(*args, **kwargs))
+        consume(self._template.root_render_func(context))  # type: ignore
+        rv = context.vars["result"]
+        if self._undefined_to_none and isinstance(rv, Undefined):
+            rv = None
+        return rv
+
+
+class TemplateStream:
+    """A template stream works pretty much like an ordinary python generator
+    but it can buffer multiple items to reduce the number of total iterations.
+    Per default the output is unbuffered which means that for every unbuffered
+    instruction in the template one string is yielded.
+
+    If buffering is enabled with a buffer size of 5, five items are combined
+    into a new string.  This is mainly useful if you are streaming
+    big templates to a client via WSGI which flushes after each iteration.
+    """
+
+    def __init__(self, gen: t.Iterator[str]) -> None:
+        self._gen = gen
+        self.disable_buffering()
+
+    def dump(
+        self,
+        fp: t.Union[str, t.IO],
+        encoding: t.Optional[str] = None,
+        errors: t.Optional[str] = "strict",
+    ) -> None:
+        """Dump the complete stream into a file or file-like object.
+        Per default strings are written, if you want to encode
+        before writing specify an `encoding`.
+
+        Example usage::
+
+            Template('Hello {{ name }}!').stream(name='foo').dump('hello.html')
+        """
+        close = False
+
+        if isinstance(fp, str):
+            if encoding is None:
+                encoding = "utf-8"
+
+            fp = open(fp, "wb")
+            close = True
+        try:
+            if encoding is not None:
+                iterable = (x.encode(encoding, errors) for x in self)  # type: ignore
+            else:
+                iterable = self  # type: ignore
+
+            if hasattr(fp, "writelines"):
+                fp.writelines(iterable)
+            else:
+                for item in iterable:
+                    fp.write(item)
+        finally:
+            if close:
+                fp.close()
+
+    def disable_buffering(self) -> None:
+        """Disable the output buffering."""
+        self._next = partial(next, self._gen)
+        self.buffered = False
+
+    def _buffered_generator(self, size: int) -> t.Iterator[str]:
+        buf: t.List[str] = []
+        c_size = 0
+        push = buf.append
+
+        while True:
+            try:
+                while c_size < size:
+                    c = next(self._gen)
+                    push(c)
+                    if c:
+                        c_size += 1
+            except StopIteration:
+                if not c_size:
+                    return
+            yield concat(buf)
+            del buf[:]
+            c_size = 0
+
+    def enable_buffering(self, size: int = 5) -> None:
+        """Enable buffering.  Buffer `size` items before yielding them."""
+        if size <= 1:
+            raise ValueError("buffer size too small")
+
+        self.buffered = True
+        self._next = partial(next, self._buffered_generator(size))
+
+    def __iter__(self) -> "TemplateStream":
+        return self
+
+    def __next__(self) -> str:
+        return self._next()  # type: ignore
+
+
+# hook in default template class.  if anyone reads this comment: ignore that
+# it's possible to use custom templates ;-)
+Environment.template_class = Template
diff --git a/venv/lib/python3.9/site-packages/jinja2/exceptions.py b/venv/lib/python3.9/site-packages/jinja2/exceptions.py
new file mode 100644
index 0000000..082ebe8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/exceptions.py
@@ -0,0 +1,166 @@
+import typing as t
+
+if t.TYPE_CHECKING:
+    from .runtime import Undefined
+
+
+class TemplateError(Exception):
+    """Baseclass for all template errors."""
+
+    def __init__(self, message: t.Optional[str] = None) -> None:
+        super().__init__(message)
+
+    @property
+    def message(self) -> t.Optional[str]:
+        return self.args[0] if self.args else None
+
+
+class TemplateNotFound(IOError, LookupError, TemplateError):
+    """Raised if a template does not exist.
+
+    .. versionchanged:: 2.11
+        If the given name is :class:`Undefined` and no message was
+        provided, an :exc:`UndefinedError` is raised.
+    """
+
+    # Silence the Python warning about message being deprecated since
+    # it's not valid here.
+    message: t.Optional[str] = None
+
+    def __init__(
+        self,
+        name: t.Optional[t.Union[str, "Undefined"]],
+        message: t.Optional[str] = None,
+    ) -> None:
+        IOError.__init__(self, name)
+
+        if message is None:
+            from .runtime import Undefined
+
+            if isinstance(name, Undefined):
+                name._fail_with_undefined_error()
+
+            message = name
+
+        self.message = message
+        self.name = name
+        self.templates = [name]
+
+    def __str__(self) -> str:
+        return str(self.message)
+
+
+class TemplatesNotFound(TemplateNotFound):
+    """Like :class:`TemplateNotFound` but raised if multiple templates
+    are selected.  This is a subclass of :class:`TemplateNotFound`
+    exception, so just catching the base exception will catch both.
+
+    .. versionchanged:: 2.11
+        If a name in the list of names is :class:`Undefined`, a message
+        about it being undefined is shown rather than the empty string.
+
+    .. versionadded:: 2.2
+    """
+
+    def __init__(
+        self,
+        names: t.Sequence[t.Union[str, "Undefined"]] = (),
+        message: t.Optional[str] = None,
+    ) -> None:
+        if message is None:
+            from .runtime import Undefined
+
+            parts = []
+
+            for name in names:
+                if isinstance(name, Undefined):
+                    parts.append(name._undefined_message)
+                else:
+                    parts.append(name)
+
+            parts_str = ", ".join(map(str, parts))
+            message = f"none of the templates given were found: {parts_str}"
+
+        super().__init__(names[-1] if names else None, message)
+        self.templates = list(names)
+
+
+class TemplateSyntaxError(TemplateError):
+    """Raised to tell the user that there is a problem with the template."""
+
+    def __init__(
+        self,
+        message: str,
+        lineno: int,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> None:
+        super().__init__(message)
+        self.lineno = lineno
+        self.name = name
+        self.filename = filename
+        self.source: t.Optional[str] = None
+
+        # this is set to True if the debug.translate_syntax_error
+        # function translated the syntax error into a new traceback
+        self.translated = False
+
+    def __str__(self) -> str:
+        # for translated errors we only return the message
+        if self.translated:
+            return t.cast(str, self.message)
+
+        # otherwise attach some stuff
+        location = f"line {self.lineno}"
+        name = self.filename or self.name
+        if name:
+            location = f'File "{name}", {location}'
+        lines = [t.cast(str, self.message), "  " + location]
+
+        # if the source is set, add the line to the output
+        if self.source is not None:
+            try:
+                line = self.source.splitlines()[self.lineno - 1]
+            except IndexError:
+                pass
+            else:
+                lines.append("    " + line.strip())
+
+        return "\n".join(lines)
+
+    def __reduce__(self):  # type: ignore
+        # https://bugs.python.org/issue1692335 Exceptions that take
+        # multiple required arguments have problems with pickling.
+        # Without this, raises TypeError: __init__() missing 1 required
+        # positional argument: 'lineno'
+        return self.__class__, (self.message, self.lineno, self.name, self.filename)
+
+
+class TemplateAssertionError(TemplateSyntaxError):
+    """Like a template syntax error, but covers cases where something in the
+    template caused an error at compile time that wasn't necessarily caused
+    by a syntax error.  However it's a direct subclass of
+    :exc:`TemplateSyntaxError` and has the same attributes.
+    """
+
+
+class TemplateRuntimeError(TemplateError):
+    """A generic runtime error in the template engine.  Under some situations
+    Jinja may raise this exception.
+    """
+
+
+class UndefinedError(TemplateRuntimeError):
+    """Raised if a template tries to operate on :class:`Undefined`."""
+
+
+class SecurityError(TemplateRuntimeError):
+    """Raised if a template tries to do something insecure if the
+    sandbox is enabled.
+    """
+
+
+class FilterArgumentError(TemplateRuntimeError):
+    """This error is raised if a filter was called with inappropriate
+    arguments
+    """
diff --git a/venv/lib/python3.9/site-packages/jinja2/ext.py b/venv/lib/python3.9/site-packages/jinja2/ext.py
new file mode 100644
index 0000000..d555054
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/ext.py
@@ -0,0 +1,859 @@
+"""Extension API for adding custom tags and behavior."""
+import pprint
+import re
+import typing as t
+
+from markupsafe import Markup
+
+from . import defaults
+from . import nodes
+from .environment import Environment
+from .exceptions import TemplateAssertionError
+from .exceptions import TemplateSyntaxError
+from .runtime import concat  # type: ignore
+from .runtime import Context
+from .runtime import Undefined
+from .utils import import_string
+from .utils import pass_context
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .lexer import Token
+    from .lexer import TokenStream
+    from .parser import Parser
+
+    class _TranslationsBasic(te.Protocol):
+        def gettext(self, message: str) -> str:
+            ...
+
+        def ngettext(self, singular: str, plural: str, n: int) -> str:
+            pass
+
+    class _TranslationsContext(_TranslationsBasic):
+        def pgettext(self, context: str, message: str) -> str:
+            ...
+
+        def npgettext(self, context: str, singular: str, plural: str, n: int) -> str:
+            ...
+
+    _SupportedTranslations = t.Union[_TranslationsBasic, _TranslationsContext]
+
+
+# I18N functions available in Jinja templates. If the I18N library
+# provides ugettext, it will be assigned to gettext.
+GETTEXT_FUNCTIONS: t.Tuple[str, ...] = (
+    "_",
+    "gettext",
+    "ngettext",
+    "pgettext",
+    "npgettext",
+)
+_ws_re = re.compile(r"\s*\n\s*")
+
+
+class Extension:
+    """Extensions can be used to add extra functionality to the Jinja template
+    system at the parser level.  Custom extensions are bound to an environment
+    but may not store environment specific data on `self`.  The reason for
+    this is that an extension can be bound to another environment (for
+    overlays) by creating a copy and reassigning the `environment` attribute.
+
+    As extensions are created by the environment they cannot accept any
+    arguments for configuration.  One may want to work around that by using
+    a factory function, but that is not possible as extensions are identified
+    by their import name.  The correct way to configure the extension is
+    storing the configuration values on the environment.  Because this way the
+    environment ends up acting as central configuration storage the
+    attributes may clash which is why extensions have to ensure that the names
+    they choose for configuration are not too generic.  ``prefix`` for example
+    is a terrible name, ``fragment_cache_prefix`` on the other hand is a good
+    name as includes the name of the extension (fragment cache).
+    """
+
+    identifier: t.ClassVar[str]
+
+    def __init_subclass__(cls) -> None:
+        cls.identifier = f"{cls.__module__}.{cls.__name__}"
+
+    #: if this extension parses this is the list of tags it's listening to.
+    tags: t.Set[str] = set()
+
+    #: the priority of that extension.  This is especially useful for
+    #: extensions that preprocess values.  A lower value means higher
+    #: priority.
+    #:
+    #: .. versionadded:: 2.4
+    priority = 100
+
+    def __init__(self, environment: Environment) -> None:
+        self.environment = environment
+
+    def bind(self, environment: Environment) -> "Extension":
+        """Create a copy of this extension bound to another environment."""
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.environment = environment
+        return rv
+
+    def preprocess(
+        self, source: str, name: t.Optional[str], filename: t.Optional[str] = None
+    ) -> str:
+        """This method is called before the actual lexing and can be used to
+        preprocess the source.  The `filename` is optional.  The return value
+        must be the preprocessed source.
+        """
+        return source
+
+    def filter_stream(
+        self, stream: "TokenStream"
+    ) -> t.Union["TokenStream", t.Iterable["Token"]]:
+        """It's passed a :class:`~jinja2.lexer.TokenStream` that can be used
+        to filter tokens returned.  This method has to return an iterable of
+        :class:`~jinja2.lexer.Token`\\s, but it doesn't have to return a
+        :class:`~jinja2.lexer.TokenStream`.
+        """
+        return stream
+
+    def parse(self, parser: "Parser") -> t.Union[nodes.Node, t.List[nodes.Node]]:
+        """If any of the :attr:`tags` matched this method is called with the
+        parser as first argument.  The token the parser stream is pointing at
+        is the name token that matched.  This method has to return one or a
+        list of multiple nodes.
+        """
+        raise NotImplementedError()
+
+    def attr(
+        self, name: str, lineno: t.Optional[int] = None
+    ) -> nodes.ExtensionAttribute:
+        """Return an attribute node for the current extension.  This is useful
+        to pass constants on extensions to generated template code.
+
+        ::
+
+            self.attr('_my_attribute', lineno=lineno)
+        """
+        return nodes.ExtensionAttribute(self.identifier, name, lineno=lineno)
+
+    def call_method(
+        self,
+        name: str,
+        args: t.Optional[t.List[nodes.Expr]] = None,
+        kwargs: t.Optional[t.List[nodes.Keyword]] = None,
+        dyn_args: t.Optional[nodes.Expr] = None,
+        dyn_kwargs: t.Optional[nodes.Expr] = None,
+        lineno: t.Optional[int] = None,
+    ) -> nodes.Call:
+        """Call a method of the extension.  This is a shortcut for
+        :meth:`attr` + :class:`jinja2.nodes.Call`.
+        """
+        if args is None:
+            args = []
+        if kwargs is None:
+            kwargs = []
+        return nodes.Call(
+            self.attr(name, lineno=lineno),
+            args,
+            kwargs,
+            dyn_args,
+            dyn_kwargs,
+            lineno=lineno,
+        )
+
+
+@pass_context
+def _gettext_alias(
+    __context: Context, *args: t.Any, **kwargs: t.Any
+) -> t.Union[t.Any, Undefined]:
+    return __context.call(__context.resolve("gettext"), *args, **kwargs)
+
+
+def _make_new_gettext(func: t.Callable[[str], str]) -> t.Callable[..., str]:
+    @pass_context
+    def gettext(__context: Context, __string: str, **variables: t.Any) -> str:
+        rv = __context.call(func, __string)
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        # Always treat as a format string, even if there are no
+        # variables. This makes translation strings more consistent
+        # and predictable. This requires escaping
+        return rv % variables  # type: ignore
+
+    return gettext
+
+
+def _make_new_ngettext(func: t.Callable[[str, str, int], str]) -> t.Callable[..., str]:
+    @pass_context
+    def ngettext(
+        __context: Context,
+        __singular: str,
+        __plural: str,
+        __num: int,
+        **variables: t.Any,
+    ) -> str:
+        variables.setdefault("num", __num)
+        rv = __context.call(func, __singular, __plural, __num)
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables  # type: ignore
+
+    return ngettext
+
+
+def _make_new_pgettext(func: t.Callable[[str, str], str]) -> t.Callable[..., str]:
+    @pass_context
+    def pgettext(
+        __context: Context, __string_ctx: str, __string: str, **variables: t.Any
+    ) -> str:
+        variables.setdefault("context", __string_ctx)
+        rv = __context.call(func, __string_ctx, __string)
+
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables  # type: ignore
+
+    return pgettext
+
+
+def _make_new_npgettext(
+    func: t.Callable[[str, str, str, int], str]
+) -> t.Callable[..., str]:
+    @pass_context
+    def npgettext(
+        __context: Context,
+        __string_ctx: str,
+        __singular: str,
+        __plural: str,
+        __num: int,
+        **variables: t.Any,
+    ) -> str:
+        variables.setdefault("context", __string_ctx)
+        variables.setdefault("num", __num)
+        rv = __context.call(func, __string_ctx, __singular, __plural, __num)
+
+        if __context.eval_ctx.autoescape:
+            rv = Markup(rv)
+
+        # Always treat as a format string, see gettext comment above.
+        return rv % variables  # type: ignore
+
+    return npgettext
+
+
+class InternationalizationExtension(Extension):
+    """This extension adds gettext support to Jinja."""
+
+    tags = {"trans"}
+
+    # TODO: the i18n extension is currently reevaluating values in a few
+    # situations.  Take this example:
+    #   {% trans count=something() %}{{ count }} foo{% pluralize
+    #     %}{{ count }} fooss{% endtrans %}
+    # something is called twice here.  One time for the gettext value and
+    # the other time for the n-parameter of the ngettext function.
+
+    def __init__(self, environment: Environment) -> None:
+        super().__init__(environment)
+        environment.globals["_"] = _gettext_alias
+        environment.extend(
+            install_gettext_translations=self._install,
+            install_null_translations=self._install_null,
+            install_gettext_callables=self._install_callables,
+            uninstall_gettext_translations=self._uninstall,
+            extract_translations=self._extract,
+            newstyle_gettext=False,
+        )
+
+    def _install(
+        self, translations: "_SupportedTranslations", newstyle: t.Optional[bool] = None
+    ) -> None:
+        # ugettext and ungettext are preferred in case the I18N library
+        # is providing compatibility with older Python versions.
+        gettext = getattr(translations, "ugettext", None)
+        if gettext is None:
+            gettext = translations.gettext
+        ngettext = getattr(translations, "ungettext", None)
+        if ngettext is None:
+            ngettext = translations.ngettext
+
+        pgettext = getattr(translations, "pgettext", None)
+        npgettext = getattr(translations, "npgettext", None)
+        self._install_callables(
+            gettext, ngettext, newstyle=newstyle, pgettext=pgettext, npgettext=npgettext
+        )
+
+    def _install_null(self, newstyle: t.Optional[bool] = None) -> None:
+        import gettext
+
+        translations = gettext.NullTranslations()
+
+        if hasattr(translations, "pgettext"):
+            # Python < 3.8
+            pgettext = translations.pgettext  # type: ignore
+        else:
+
+            def pgettext(c: str, s: str) -> str:
+                return s
+
+        if hasattr(translations, "npgettext"):
+            npgettext = translations.npgettext  # type: ignore
+        else:
+
+            def npgettext(c: str, s: str, p: str, n: int) -> str:
+                return s if n == 1 else p
+
+        self._install_callables(
+            gettext=translations.gettext,
+            ngettext=translations.ngettext,
+            newstyle=newstyle,
+            pgettext=pgettext,
+            npgettext=npgettext,
+        )
+
+    def _install_callables(
+        self,
+        gettext: t.Callable[[str], str],
+        ngettext: t.Callable[[str, str, int], str],
+        newstyle: t.Optional[bool] = None,
+        pgettext: t.Optional[t.Callable[[str, str], str]] = None,
+        npgettext: t.Optional[t.Callable[[str, str, str, int], str]] = None,
+    ) -> None:
+        if newstyle is not None:
+            self.environment.newstyle_gettext = newstyle  # type: ignore
+        if self.environment.newstyle_gettext:  # type: ignore
+            gettext = _make_new_gettext(gettext)
+            ngettext = _make_new_ngettext(ngettext)
+
+            if pgettext is not None:
+                pgettext = _make_new_pgettext(pgettext)
+
+            if npgettext is not None:
+                npgettext = _make_new_npgettext(npgettext)
+
+        self.environment.globals.update(
+            gettext=gettext, ngettext=ngettext, pgettext=pgettext, npgettext=npgettext
+        )
+
+    def _uninstall(self, translations: "_SupportedTranslations") -> None:
+        for key in ("gettext", "ngettext", "pgettext", "npgettext"):
+            self.environment.globals.pop(key, None)
+
+    def _extract(
+        self,
+        source: t.Union[str, nodes.Template],
+        gettext_functions: t.Sequence[str] = GETTEXT_FUNCTIONS,
+    ) -> t.Iterator[
+        t.Tuple[int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]]
+    ]:
+        if isinstance(source, str):
+            source = self.environment.parse(source)
+        return extract_from_ast(source, gettext_functions)
+
+    def parse(self, parser: "Parser") -> t.Union[nodes.Node, t.List[nodes.Node]]:
+        """Parse a translatable tag."""
+        lineno = next(parser.stream).lineno
+
+        context = None
+        context_token = parser.stream.next_if("string")
+
+        if context_token is not None:
+            context = context_token.value
+
+        # find all the variables referenced.  Additionally a variable can be
+        # defined in the body of the trans block too, but this is checked at
+        # a later state.
+        plural_expr: t.Optional[nodes.Expr] = None
+        plural_expr_assignment: t.Optional[nodes.Assign] = None
+        num_called_num = False
+        variables: t.Dict[str, nodes.Expr] = {}
+        trimmed = None
+        while parser.stream.current.type != "block_end":
+            if variables:
+                parser.stream.expect("comma")
+
+            # skip colon for python compatibility
+            if parser.stream.skip_if("colon"):
+                break
+
+            token = parser.stream.expect("name")
+            if token.value in variables:
+                parser.fail(
+                    f"translatable variable {token.value!r} defined twice.",
+                    token.lineno,
+                    exc=TemplateAssertionError,
+                )
+
+            # expressions
+            if parser.stream.current.type == "assign":
+                next(parser.stream)
+                variables[token.value] = var = parser.parse_expression()
+            elif trimmed is None and token.value in ("trimmed", "notrimmed"):
+                trimmed = token.value == "trimmed"
+                continue
+            else:
+                variables[token.value] = var = nodes.Name(token.value, "load")
+
+            if plural_expr is None:
+                if isinstance(var, nodes.Call):
+                    plural_expr = nodes.Name("_trans", "load")
+                    variables[token.value] = plural_expr
+                    plural_expr_assignment = nodes.Assign(
+                        nodes.Name("_trans", "store"), var
+                    )
+                else:
+                    plural_expr = var
+                num_called_num = token.value == "num"
+
+        parser.stream.expect("block_end")
+
+        plural = None
+        have_plural = False
+        referenced = set()
+
+        # now parse until endtrans or pluralize
+        singular_names, singular = self._parse_block(parser, True)
+        if singular_names:
+            referenced.update(singular_names)
+            if plural_expr is None:
+                plural_expr = nodes.Name(singular_names[0], "load")
+                num_called_num = singular_names[0] == "num"
+
+        # if we have a pluralize block, we parse that too
+        if parser.stream.current.test("name:pluralize"):
+            have_plural = True
+            next(parser.stream)
+            if parser.stream.current.type != "block_end":
+                token = parser.stream.expect("name")
+                if token.value not in variables:
+                    parser.fail(
+                        f"unknown variable {token.value!r} for pluralization",
+                        token.lineno,
+                        exc=TemplateAssertionError,
+                    )
+                plural_expr = variables[token.value]
+                num_called_num = token.value == "num"
+            parser.stream.expect("block_end")
+            plural_names, plural = self._parse_block(parser, False)
+            next(parser.stream)
+            referenced.update(plural_names)
+        else:
+            next(parser.stream)
+
+        # register free names as simple name expressions
+        for name in referenced:
+            if name not in variables:
+                variables[name] = nodes.Name(name, "load")
+
+        if not have_plural:
+            plural_expr = None
+        elif plural_expr is None:
+            parser.fail("pluralize without variables", lineno)
+
+        if trimmed is None:
+            trimmed = self.environment.policies["ext.i18n.trimmed"]
+        if trimmed:
+            singular = self._trim_whitespace(singular)
+            if plural:
+                plural = self._trim_whitespace(plural)
+
+        node = self._make_node(
+            singular,
+            plural,
+            context,
+            variables,
+            plural_expr,
+            bool(referenced),
+            num_called_num and have_plural,
+        )
+        node.set_lineno(lineno)
+        if plural_expr_assignment is not None:
+            return [plural_expr_assignment, node]
+        else:
+            return node
+
+    def _trim_whitespace(self, string: str, _ws_re: t.Pattern[str] = _ws_re) -> str:
+        return _ws_re.sub(" ", string.strip())
+
+    def _parse_block(
+        self, parser: "Parser", allow_pluralize: bool
+    ) -> t.Tuple[t.List[str], str]:
+        """Parse until the next block tag with a given name."""
+        referenced = []
+        buf = []
+
+        while True:
+            if parser.stream.current.type == "data":
+                buf.append(parser.stream.current.value.replace("%", "%%"))
+                next(parser.stream)
+            elif parser.stream.current.type == "variable_begin":
+                next(parser.stream)
+                name = parser.stream.expect("name").value
+                referenced.append(name)
+                buf.append(f"%({name})s")
+                parser.stream.expect("variable_end")
+            elif parser.stream.current.type == "block_begin":
+                next(parser.stream)
+                if parser.stream.current.test("name:endtrans"):
+                    break
+                elif parser.stream.current.test("name:pluralize"):
+                    if allow_pluralize:
+                        break
+                    parser.fail(
+                        "a translatable section can have only one pluralize section"
+                    )
+                parser.fail(
+                    "control structures in translatable sections are not allowed"
+                )
+            elif parser.stream.eos:
+                parser.fail("unclosed translation block")
+            else:
+                raise RuntimeError("internal parser error")
+
+        return referenced, concat(buf)
+
+    def _make_node(
+        self,
+        singular: str,
+        plural: t.Optional[str],
+        context: t.Optional[str],
+        variables: t.Dict[str, nodes.Expr],
+        plural_expr: t.Optional[nodes.Expr],
+        vars_referenced: bool,
+        num_called_num: bool,
+    ) -> nodes.Output:
+        """Generates a useful node from the data provided."""
+        newstyle = self.environment.newstyle_gettext  # type: ignore
+        node: nodes.Expr
+
+        # no variables referenced?  no need to escape for old style
+        # gettext invocations only if there are vars.
+        if not vars_referenced and not newstyle:
+            singular = singular.replace("%%", "%")
+            if plural:
+                plural = plural.replace("%%", "%")
+
+        func_name = "gettext"
+        func_args: t.List[nodes.Expr] = [nodes.Const(singular)]
+
+        if context is not None:
+            func_args.insert(0, nodes.Const(context))
+            func_name = f"p{func_name}"
+
+        if plural_expr is not None:
+            func_name = f"n{func_name}"
+            func_args.extend((nodes.Const(plural), plural_expr))
+
+        node = nodes.Call(nodes.Name(func_name, "load"), func_args, [], None, None)
+
+        # in case newstyle gettext is used, the method is powerful
+        # enough to handle the variable expansion and autoescape
+        # handling itself
+        if newstyle:
+            for key, value in variables.items():
+                # the function adds that later anyways in case num was
+                # called num, so just skip it.
+                if num_called_num and key == "num":
+                    continue
+                node.kwargs.append(nodes.Keyword(key, value))
+
+        # otherwise do that here
+        else:
+            # mark the return value as safe if we are in an
+            # environment with autoescaping turned on
+            node = nodes.MarkSafeIfAutoescape(node)
+            if variables:
+                node = nodes.Mod(
+                    node,
+                    nodes.Dict(
+                        [
+                            nodes.Pair(nodes.Const(key), value)
+                            for key, value in variables.items()
+                        ]
+                    ),
+                )
+        return nodes.Output([node])
+
+
+class ExprStmtExtension(Extension):
+    """Adds a `do` tag to Jinja that works like the print statement just
+    that it doesn't print the return value.
+    """
+
+    tags = {"do"}
+
+    def parse(self, parser: "Parser") -> nodes.ExprStmt:
+        node = nodes.ExprStmt(lineno=next(parser.stream).lineno)
+        node.node = parser.parse_tuple()
+        return node
+
+
+class LoopControlExtension(Extension):
+    """Adds break and continue to the template engine."""
+
+    tags = {"break", "continue"}
+
+    def parse(self, parser: "Parser") -> t.Union[nodes.Break, nodes.Continue]:
+        token = next(parser.stream)
+        if token.value == "break":
+            return nodes.Break(lineno=token.lineno)
+        return nodes.Continue(lineno=token.lineno)
+
+
+class DebugExtension(Extension):
+    """A ``{% debug %}`` tag that dumps the available variables,
+    filters, and tests.
+
+    .. code-block:: html+jinja
+
+        <pre>{% debug %}</pre>
+
+    .. code-block:: text
+
+        {'context': {'cycler': <class 'jinja2.utils.Cycler'>,
+                     ...,
+                     'namespace': <class 'jinja2.utils.Namespace'>},
+         'filters': ['abs', 'attr', 'batch', 'capitalize', 'center', 'count', 'd',
+                     ..., 'urlencode', 'urlize', 'wordcount', 'wordwrap', 'xmlattr'],
+         'tests': ['!=', '<', '<=', '==', '>', '>=', 'callable', 'defined',
+                   ..., 'odd', 'sameas', 'sequence', 'string', 'undefined', 'upper']}
+
+    .. versionadded:: 2.11.0
+    """
+
+    tags = {"debug"}
+
+    def parse(self, parser: "Parser") -> nodes.Output:
+        lineno = parser.stream.expect("name:debug").lineno
+        context = nodes.ContextReference()
+        result = self.call_method("_render", [context], lineno=lineno)
+        return nodes.Output([result], lineno=lineno)
+
+    def _render(self, context: Context) -> str:
+        result = {
+            "context": context.get_all(),
+            "filters": sorted(self.environment.filters.keys()),
+            "tests": sorted(self.environment.tests.keys()),
+        }
+
+        # Set the depth since the intent is to show the top few names.
+        return pprint.pformat(result, depth=3, compact=True)
+
+
+def extract_from_ast(
+    ast: nodes.Template,
+    gettext_functions: t.Sequence[str] = GETTEXT_FUNCTIONS,
+    babel_style: bool = True,
+) -> t.Iterator[
+    t.Tuple[int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]]
+]:
+    """Extract localizable strings from the given template node.  Per
+    default this function returns matches in babel style that means non string
+    parameters as well as keyword arguments are returned as `None`.  This
+    allows Babel to figure out what you really meant if you are using
+    gettext functions that allow keyword arguments for placeholder expansion.
+    If you don't want that behavior set the `babel_style` parameter to `False`
+    which causes only strings to be returned and parameters are always stored
+    in tuples.  As a consequence invalid gettext calls (calls without a single
+    string parameter or string parameters after non-string parameters) are
+    skipped.
+
+    This example explains the behavior:
+
+    >>> from jinja2 import Environment
+    >>> env = Environment()
+    >>> node = env.parse('{{ (_("foo"), _(), ngettext("foo", "bar", 42)) }}')
+    >>> list(extract_from_ast(node))
+    [(1, '_', 'foo'), (1, '_', ()), (1, 'ngettext', ('foo', 'bar', None))]
+    >>> list(extract_from_ast(node, babel_style=False))
+    [(1, '_', ('foo',)), (1, 'ngettext', ('foo', 'bar'))]
+
+    For every string found this function yields a ``(lineno, function,
+    message)`` tuple, where:
+
+    * ``lineno`` is the number of the line on which the string was found,
+    * ``function`` is the name of the ``gettext`` function used (if the
+      string was extracted from embedded Python code), and
+    *   ``message`` is the string, or a tuple of strings for functions
+         with multiple string arguments.
+
+    This extraction function operates on the AST and is because of that unable
+    to extract any comments.  For comment support you have to use the babel
+    extraction interface or extract comments yourself.
+    """
+    out: t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]]
+
+    for node in ast.find_all(nodes.Call):
+        if (
+            not isinstance(node.node, nodes.Name)
+            or node.node.name not in gettext_functions
+        ):
+            continue
+
+        strings: t.List[t.Optional[str]] = []
+
+        for arg in node.args:
+            if isinstance(arg, nodes.Const) and isinstance(arg.value, str):
+                strings.append(arg.value)
+            else:
+                strings.append(None)
+
+        for _ in node.kwargs:
+            strings.append(None)
+        if node.dyn_args is not None:
+            strings.append(None)
+        if node.dyn_kwargs is not None:
+            strings.append(None)
+
+        if not babel_style:
+            out = tuple(x for x in strings if x is not None)
+
+            if not out:
+                continue
+        else:
+            if len(strings) == 1:
+                out = strings[0]
+            else:
+                out = tuple(strings)
+
+        yield node.lineno, node.node.name, out
+
+
+class _CommentFinder:
+    """Helper class to find comments in a token stream.  Can only
+    find comments for gettext calls forwards.  Once the comment
+    from line 4 is found, a comment for line 1 will not return a
+    usable value.
+    """
+
+    def __init__(
+        self, tokens: t.Sequence[t.Tuple[int, str, str]], comment_tags: t.Sequence[str]
+    ) -> None:
+        self.tokens = tokens
+        self.comment_tags = comment_tags
+        self.offset = 0
+        self.last_lineno = 0
+
+    def find_backwards(self, offset: int) -> t.List[str]:
+        try:
+            for _, token_type, token_value in reversed(
+                self.tokens[self.offset : offset]
+            ):
+                if token_type in ("comment", "linecomment"):
+                    try:
+                        prefix, comment = token_value.split(None, 1)
+                    except ValueError:
+                        continue
+                    if prefix in self.comment_tags:
+                        return [comment.rstrip()]
+            return []
+        finally:
+            self.offset = offset
+
+    def find_comments(self, lineno: int) -> t.List[str]:
+        if not self.comment_tags or self.last_lineno > lineno:
+            return []
+        for idx, (token_lineno, _, _) in enumerate(self.tokens[self.offset :]):
+            if token_lineno > lineno:
+                return self.find_backwards(self.offset + idx)
+        return self.find_backwards(len(self.tokens))
+
+
+def babel_extract(
+    fileobj: t.BinaryIO,
+    keywords: t.Sequence[str],
+    comment_tags: t.Sequence[str],
+    options: t.Dict[str, t.Any],
+) -> t.Iterator[
+    t.Tuple[
+        int, str, t.Union[t.Optional[str], t.Tuple[t.Optional[str], ...]], t.List[str]
+    ]
+]:
+    """Babel extraction method for Jinja templates.
+
+    .. versionchanged:: 2.3
+       Basic support for translation comments was added.  If `comment_tags`
+       is now set to a list of keywords for extraction, the extractor will
+       try to find the best preceding comment that begins with one of the
+       keywords.  For best results, make sure to not have more than one
+       gettext call in one line of code and the matching comment in the
+       same line or the line before.
+
+    .. versionchanged:: 2.5.1
+       The `newstyle_gettext` flag can be set to `True` to enable newstyle
+       gettext calls.
+
+    .. versionchanged:: 2.7
+       A `silent` option can now be provided.  If set to `False` template
+       syntax errors are propagated instead of being ignored.
+
+    :param fileobj: the file-like object the messages should be extracted from
+    :param keywords: a list of keywords (i.e. function names) that should be
+                     recognized as translation functions
+    :param comment_tags: a list of translator tags to search for and include
+                         in the results.
+    :param options: a dictionary of additional options (optional)
+    :return: an iterator over ``(lineno, funcname, message, comments)`` tuples.
+             (comments will be empty currently)
+    """
+    extensions: t.Dict[t.Type[Extension], None] = {}
+
+    for extension_name in options.get("extensions", "").split(","):
+        extension_name = extension_name.strip()
+
+        if not extension_name:
+            continue
+
+        extensions[import_string(extension_name)] = None
+
+    if InternationalizationExtension not in extensions:
+        extensions[InternationalizationExtension] = None
+
+    def getbool(options: t.Mapping[str, str], key: str, default: bool = False) -> bool:
+        return options.get(key, str(default)).lower() in {"1", "on", "yes", "true"}
+
+    silent = getbool(options, "silent", True)
+    environment = Environment(
+        options.get("block_start_string", defaults.BLOCK_START_STRING),
+        options.get("block_end_string", defaults.BLOCK_END_STRING),
+        options.get("variable_start_string", defaults.VARIABLE_START_STRING),
+        options.get("variable_end_string", defaults.VARIABLE_END_STRING),
+        options.get("comment_start_string", defaults.COMMENT_START_STRING),
+        options.get("comment_end_string", defaults.COMMENT_END_STRING),
+        options.get("line_statement_prefix") or defaults.LINE_STATEMENT_PREFIX,
+        options.get("line_comment_prefix") or defaults.LINE_COMMENT_PREFIX,
+        getbool(options, "trim_blocks", defaults.TRIM_BLOCKS),
+        getbool(options, "lstrip_blocks", defaults.LSTRIP_BLOCKS),
+        defaults.NEWLINE_SEQUENCE,
+        getbool(options, "keep_trailing_newline", defaults.KEEP_TRAILING_NEWLINE),
+        tuple(extensions),
+        cache_size=0,
+        auto_reload=False,
+    )
+
+    if getbool(options, "trimmed"):
+        environment.policies["ext.i18n.trimmed"] = True
+    if getbool(options, "newstyle_gettext"):
+        environment.newstyle_gettext = True  # type: ignore
+
+    source = fileobj.read().decode(options.get("encoding", "utf-8"))
+    try:
+        node = environment.parse(source)
+        tokens = list(environment.lex(environment.preprocess(source)))
+    except TemplateSyntaxError:
+        if not silent:
+            raise
+        # skip templates with syntax errors
+        return
+
+    finder = _CommentFinder(tokens, comment_tags)
+    for lineno, func, message in extract_from_ast(node, keywords):
+        yield lineno, func, message, finder.find_comments(lineno)
+
+
+#: nicer import names
+i18n = InternationalizationExtension
+do = ExprStmtExtension
+loopcontrols = LoopControlExtension
+debug = DebugExtension
diff --git a/venv/lib/python3.9/site-packages/jinja2/filters.py b/venv/lib/python3.9/site-packages/jinja2/filters.py
new file mode 100644
index 0000000..ed07c4c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/filters.py
@@ -0,0 +1,1840 @@
+"""Built-in template filters used with the ``|`` operator."""
+import math
+import random
+import re
+import typing
+import typing as t
+from collections import abc
+from itertools import chain
+from itertools import groupby
+
+from markupsafe import escape
+from markupsafe import Markup
+from markupsafe import soft_str
+
+from .async_utils import async_variant
+from .async_utils import auto_aiter
+from .async_utils import auto_await
+from .async_utils import auto_to_list
+from .exceptions import FilterArgumentError
+from .runtime import Undefined
+from .utils import htmlsafe_json_dumps
+from .utils import pass_context
+from .utils import pass_environment
+from .utils import pass_eval_context
+from .utils import pformat
+from .utils import url_quote
+from .utils import urlize
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+    from .nodes import EvalContext
+    from .runtime import Context
+    from .sandbox import SandboxedEnvironment  # noqa: F401
+
+    class HasHTML(te.Protocol):
+        def __html__(self) -> str:
+            pass
+
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+K = t.TypeVar("K")
+V = t.TypeVar("V")
+
+
+def ignore_case(value: V) -> V:
+    """For use as a postprocessor for :func:`make_attrgetter`. Converts strings
+    to lowercase and returns other types as-is."""
+    if isinstance(value, str):
+        return t.cast(V, value.lower())
+
+    return value
+
+
+def make_attrgetter(
+    environment: "Environment",
+    attribute: t.Optional[t.Union[str, int]],
+    postprocess: t.Optional[t.Callable[[t.Any], t.Any]] = None,
+    default: t.Optional[t.Any] = None,
+) -> t.Callable[[t.Any], t.Any]:
+    """Returns a callable that looks up the given attribute from a
+    passed object with the rules of the environment.  Dots are allowed
+    to access attributes of attributes.  Integer parts in paths are
+    looked up as integers.
+    """
+    parts = _prepare_attribute_parts(attribute)
+
+    def attrgetter(item: t.Any) -> t.Any:
+        for part in parts:
+            item = environment.getitem(item, part)
+
+            if default is not None and isinstance(item, Undefined):
+                item = default
+
+        if postprocess is not None:
+            item = postprocess(item)
+
+        return item
+
+    return attrgetter
+
+
+def make_multi_attrgetter(
+    environment: "Environment",
+    attribute: t.Optional[t.Union[str, int]],
+    postprocess: t.Optional[t.Callable[[t.Any], t.Any]] = None,
+) -> t.Callable[[t.Any], t.List[t.Any]]:
+    """Returns a callable that looks up the given comma separated
+    attributes from a passed object with the rules of the environment.
+    Dots are allowed to access attributes of each attribute.  Integer
+    parts in paths are looked up as integers.
+
+    The value returned by the returned callable is a list of extracted
+    attribute values.
+
+    Examples of attribute: "attr1,attr2", "attr1.inner1.0,attr2.inner2.0", etc.
+    """
+    if isinstance(attribute, str):
+        split: t.Sequence[t.Union[str, int, None]] = attribute.split(",")
+    else:
+        split = [attribute]
+
+    parts = [_prepare_attribute_parts(item) for item in split]
+
+    def attrgetter(item: t.Any) -> t.List[t.Any]:
+        items = [None] * len(parts)
+
+        for i, attribute_part in enumerate(parts):
+            item_i = item
+
+            for part in attribute_part:
+                item_i = environment.getitem(item_i, part)
+
+            if postprocess is not None:
+                item_i = postprocess(item_i)
+
+            items[i] = item_i
+
+        return items
+
+    return attrgetter
+
+
+def _prepare_attribute_parts(
+    attr: t.Optional[t.Union[str, int]]
+) -> t.List[t.Union[str, int]]:
+    if attr is None:
+        return []
+
+    if isinstance(attr, str):
+        return [int(x) if x.isdigit() else x for x in attr.split(".")]
+
+    return [attr]
+
+
+def do_forceescape(value: "t.Union[str, HasHTML]") -> Markup:
+    """Enforce HTML escaping.  This will probably double escape variables."""
+    if hasattr(value, "__html__"):
+        value = t.cast("HasHTML", value).__html__()
+
+    return escape(str(value))
+
+
+def do_urlencode(
+    value: t.Union[str, t.Mapping[str, t.Any], t.Iterable[t.Tuple[str, t.Any]]]
+) -> str:
+    """Quote data for use in a URL path or query using UTF-8.
+
+    Basic wrapper around :func:`urllib.parse.quote` when given a
+    string, or :func:`urllib.parse.urlencode` for a dict or iterable.
+
+    :param value: Data to quote. A string will be quoted directly. A
+        dict or iterable of ``(key, value)`` pairs will be joined as a
+        query string.
+
+    When given a string, "/" is not quoted. HTTP servers treat "/" and
+    "%2F" equivalently in paths. If you need quoted slashes, use the
+    ``|replace("/", "%2F")`` filter.
+
+    .. versionadded:: 2.7
+    """
+    if isinstance(value, str) or not isinstance(value, abc.Iterable):
+        return url_quote(value)
+
+    if isinstance(value, dict):
+        items: t.Iterable[t.Tuple[str, t.Any]] = value.items()
+    else:
+        items = value  # type: ignore
+
+    return "&".join(
+        f"{url_quote(k, for_qs=True)}={url_quote(v, for_qs=True)}" for k, v in items
+    )
+
+
+@pass_eval_context
+def do_replace(
+    eval_ctx: "EvalContext", s: str, old: str, new: str, count: t.Optional[int] = None
+) -> str:
+    """Return a copy of the value with all occurrences of a substring
+    replaced with a new one. The first argument is the substring
+    that should be replaced, the second is the replacement string.
+    If the optional third argument ``count`` is given, only the first
+    ``count`` occurrences are replaced:
+
+    .. sourcecode:: jinja
+
+        {{ "Hello World"|replace("Hello", "Goodbye") }}
+            -> Goodbye World
+
+        {{ "aaaaargh"|replace("a", "d'oh, ", 2) }}
+            -> d'oh, d'oh, aaargh
+    """
+    if count is None:
+        count = -1
+
+    if not eval_ctx.autoescape:
+        return str(s).replace(str(old), str(new), count)
+
+    if (
+        hasattr(old, "__html__")
+        or hasattr(new, "__html__")
+        and not hasattr(s, "__html__")
+    ):
+        s = escape(s)
+    else:
+        s = soft_str(s)
+
+    return s.replace(soft_str(old), soft_str(new), count)
+
+
+def do_upper(s: str) -> str:
+    """Convert a value to uppercase."""
+    return soft_str(s).upper()
+
+
+def do_lower(s: str) -> str:
+    """Convert a value to lowercase."""
+    return soft_str(s).lower()
+
+
+def do_items(value: t.Union[t.Mapping[K, V], Undefined]) -> t.Iterator[t.Tuple[K, V]]:
+    """Return an iterator over the ``(key, value)`` items of a mapping.
+
+    ``x|items`` is the same as ``x.items()``, except if ``x`` is
+    undefined an empty iterator is returned.
+
+    This filter is useful if you expect the template to be rendered with
+    an implementation of Jinja in another programming language that does
+    not have a ``.items()`` method on its mapping type.
+
+    .. code-block:: html+jinja
+
+        <dl>
+        {% for key, value in my_dict|items %}
+            <dt>{{ key }}
+            <dd>{{ value }}
+        {% endfor %}
+        </dl>
+
+    .. versionadded:: 3.1
+    """
+    if isinstance(value, Undefined):
+        return
+
+    if not isinstance(value, abc.Mapping):
+        raise TypeError("Can only get item pairs from a mapping.")
+
+    yield from value.items()
+
+
+@pass_eval_context
+def do_xmlattr(
+    eval_ctx: "EvalContext", d: t.Mapping[str, t.Any], autospace: bool = True
+) -> str:
+    """Create an SGML/XML attribute string based on the items in a dict.
+    All values that are neither `none` nor `undefined` are automatically
+    escaped:
+
+    .. sourcecode:: html+jinja
+
+        <ul{{ {'class': 'my_list', 'missing': none,
+                'id': 'list-%d'|format(variable)}|xmlattr }}>
+        ...
+        </ul>
+
+    Results in something like this:
+
+    .. sourcecode:: html
+
+        <ul class="my_list" id="list-42">
+        ...
+        </ul>
+
+    As you can see it automatically prepends a space in front of the item
+    if the filter returned something unless the second parameter is false.
+    """
+    rv = " ".join(
+        f'{escape(key)}="{escape(value)}"'
+        for key, value in d.items()
+        if value is not None and not isinstance(value, Undefined)
+    )
+
+    if autospace and rv:
+        rv = " " + rv
+
+    if eval_ctx.autoescape:
+        rv = Markup(rv)
+
+    return rv
+
+
+def do_capitalize(s: str) -> str:
+    """Capitalize a value. The first character will be uppercase, all others
+    lowercase.
+    """
+    return soft_str(s).capitalize()
+
+
+_word_beginning_split_re = re.compile(r"([-\s({\[<]+)")
+
+
+def do_title(s: str) -> str:
+    """Return a titlecased version of the value. I.e. words will start with
+    uppercase letters, all remaining characters are lowercase.
+    """
+    return "".join(
+        [
+            item[0].upper() + item[1:].lower()
+            for item in _word_beginning_split_re.split(soft_str(s))
+            if item
+        ]
+    )
+
+
+def do_dictsort(
+    value: t.Mapping[K, V],
+    case_sensitive: bool = False,
+    by: 'te.Literal["key", "value"]' = "key",
+    reverse: bool = False,
+) -> t.List[t.Tuple[K, V]]:
+    """Sort a dict and yield (key, value) pairs. Python dicts may not
+    be in the order you want to display them in, so sort them first.
+
+    .. sourcecode:: jinja
+
+        {% for key, value in mydict|dictsort %}
+            sort the dict by key, case insensitive
+
+        {% for key, value in mydict|dictsort(reverse=true) %}
+            sort the dict by key, case insensitive, reverse order
+
+        {% for key, value in mydict|dictsort(true) %}
+            sort the dict by key, case sensitive
+
+        {% for key, value in mydict|dictsort(false, 'value') %}
+            sort the dict by value, case insensitive
+    """
+    if by == "key":
+        pos = 0
+    elif by == "value":
+        pos = 1
+    else:
+        raise FilterArgumentError('You can only sort by either "key" or "value"')
+
+    def sort_func(item: t.Tuple[t.Any, t.Any]) -> t.Any:
+        value = item[pos]
+
+        if not case_sensitive:
+            value = ignore_case(value)
+
+        return value
+
+    return sorted(value.items(), key=sort_func, reverse=reverse)
+
+
+@pass_environment
+def do_sort(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    reverse: bool = False,
+    case_sensitive: bool = False,
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> "t.List[V]":
+    """Sort an iterable using Python's :func:`sorted`.
+
+    .. sourcecode:: jinja
+
+        {% for city in cities|sort %}
+            ...
+        {% endfor %}
+
+    :param reverse: Sort descending instead of ascending.
+    :param case_sensitive: When sorting strings, sort upper and lower
+        case separately.
+    :param attribute: When sorting objects or dicts, an attribute or
+        key to sort by. Can use dot notation like ``"address.city"``.
+        Can be a list of attributes like ``"age,name"``.
+
+    The sort is stable, it does not change the relative order of
+    elements that compare equal. This makes it is possible to chain
+    sorts on different attributes and ordering.
+
+    .. sourcecode:: jinja
+
+        {% for user in users|sort(attribute="name")
+            |sort(reverse=true, attribute="age") %}
+            ...
+        {% endfor %}
+
+    As a shortcut to chaining when the direction is the same for all
+    attributes, pass a comma separate list of attributes.
+
+    .. sourcecode:: jinja
+
+        {% for user in users|sort(attribute="age,name") %}
+            ...
+        {% endfor %}
+
+    .. versionchanged:: 2.11.0
+        The ``attribute`` parameter can be a comma separated list of
+        attributes, e.g. ``"age,name"``.
+
+    .. versionchanged:: 2.6
+       The ``attribute`` parameter was added.
+    """
+    key_func = make_multi_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    return sorted(value, key=key_func, reverse=reverse)
+
+
+@pass_environment
+def do_unique(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    case_sensitive: bool = False,
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> "t.Iterator[V]":
+    """Returns a list of unique items from the given iterable.
+
+    .. sourcecode:: jinja
+
+        {{ ['foo', 'bar', 'foobar', 'FooBar']|unique|list }}
+            -> ['foo', 'bar', 'foobar']
+
+    The unique items are yielded in the same order as their first occurrence in
+    the iterable passed to the filter.
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Filter objects with unique values for this attribute.
+    """
+    getter = make_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    seen = set()
+
+    for item in value:
+        key = getter(item)
+
+        if key not in seen:
+            seen.add(key)
+            yield item
+
+
+def _min_or_max(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    func: "t.Callable[..., V]",
+    case_sensitive: bool,
+    attribute: t.Optional[t.Union[str, int]],
+) -> "t.Union[V, Undefined]":
+    it = iter(value)
+
+    try:
+        first = next(it)
+    except StopIteration:
+        return environment.undefined("No aggregated item, sequence was empty.")
+
+    key_func = make_attrgetter(
+        environment, attribute, postprocess=ignore_case if not case_sensitive else None
+    )
+    return func(chain([first], it), key=key_func)
+
+
+@pass_environment
+def do_min(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    case_sensitive: bool = False,
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> "t.Union[V, Undefined]":
+    """Return the smallest item from the sequence.
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|min }}
+            -> 1
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Get the object with the min value of this attribute.
+    """
+    return _min_or_max(environment, value, min, case_sensitive, attribute)
+
+
+@pass_environment
+def do_max(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    case_sensitive: bool = False,
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> "t.Union[V, Undefined]":
+    """Return the largest item from the sequence.
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|max }}
+            -> 3
+
+    :param case_sensitive: Treat upper and lower case strings as distinct.
+    :param attribute: Get the object with the max value of this attribute.
+    """
+    return _min_or_max(environment, value, max, case_sensitive, attribute)
+
+
+def do_default(
+    value: V,
+    default_value: V = "",  # type: ignore
+    boolean: bool = False,
+) -> V:
+    """If the value is undefined it will return the passed default value,
+    otherwise the value of the variable:
+
+    .. sourcecode:: jinja
+
+        {{ my_variable|default('my_variable is not defined') }}
+
+    This will output the value of ``my_variable`` if the variable was
+    defined, otherwise ``'my_variable is not defined'``. If you want
+    to use default with variables that evaluate to false you have to
+    set the second parameter to `true`:
+
+    .. sourcecode:: jinja
+
+        {{ ''|default('the string was empty', true) }}
+
+    .. versionchanged:: 2.11
+       It's now possible to configure the :class:`~jinja2.Environment` with
+       :class:`~jinja2.ChainableUndefined` to make the `default` filter work
+       on nested elements and attributes that may contain undefined values
+       in the chain without getting an :exc:`~jinja2.UndefinedError`.
+    """
+    if isinstance(value, Undefined) or (boolean and not value):
+        return default_value
+
+    return value
+
+
+@pass_eval_context
+def sync_do_join(
+    eval_ctx: "EvalContext",
+    value: t.Iterable,
+    d: str = "",
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> str:
+    """Return a string which is the concatenation of the strings in the
+    sequence. The separator between elements is an empty string per
+    default, you can define it with the optional parameter:
+
+    .. sourcecode:: jinja
+
+        {{ [1, 2, 3]|join('|') }}
+            -> 1|2|3
+
+        {{ [1, 2, 3]|join }}
+            -> 123
+
+    It is also possible to join certain attributes of an object:
+
+    .. sourcecode:: jinja
+
+        {{ users|join(', ', attribute='username') }}
+
+    .. versionadded:: 2.6
+       The `attribute` parameter was added.
+    """
+    if attribute is not None:
+        value = map(make_attrgetter(eval_ctx.environment, attribute), value)
+
+    # no automatic escaping?  joining is a lot easier then
+    if not eval_ctx.autoescape:
+        return str(d).join(map(str, value))
+
+    # if the delimiter doesn't have an html representation we check
+    # if any of the items has.  If yes we do a coercion to Markup
+    if not hasattr(d, "__html__"):
+        value = list(value)
+        do_escape = False
+
+        for idx, item in enumerate(value):
+            if hasattr(item, "__html__"):
+                do_escape = True
+            else:
+                value[idx] = str(item)
+
+        if do_escape:
+            d = escape(d)
+        else:
+            d = str(d)
+
+        return d.join(value)
+
+    # no html involved, to normal joining
+    return soft_str(d).join(map(soft_str, value))
+
+
+@async_variant(sync_do_join)  # type: ignore
+async def do_join(
+    eval_ctx: "EvalContext",
+    value: t.Union[t.AsyncIterable, t.Iterable],
+    d: str = "",
+    attribute: t.Optional[t.Union[str, int]] = None,
+) -> str:
+    return sync_do_join(eval_ctx, await auto_to_list(value), d, attribute)
+
+
+def do_center(value: str, width: int = 80) -> str:
+    """Centers the value in a field of a given width."""
+    return soft_str(value).center(width)
+
+
+@pass_environment
+def sync_do_first(
+    environment: "Environment", seq: "t.Iterable[V]"
+) -> "t.Union[V, Undefined]":
+    """Return the first item of a sequence."""
+    try:
+        return next(iter(seq))
+    except StopIteration:
+        return environment.undefined("No first item, sequence was empty.")
+
+
+@async_variant(sync_do_first)  # type: ignore
+async def do_first(
+    environment: "Environment", seq: "t.Union[t.AsyncIterable[V], t.Iterable[V]]"
+) -> "t.Union[V, Undefined]":
+    try:
+        return await auto_aiter(seq).__anext__()
+    except StopAsyncIteration:
+        return environment.undefined("No first item, sequence was empty.")
+
+
+@pass_environment
+def do_last(
+    environment: "Environment", seq: "t.Reversible[V]"
+) -> "t.Union[V, Undefined]":
+    """Return the last item of a sequence.
+
+    Note: Does not work with generators. You may want to explicitly
+    convert it to a list:
+
+    .. sourcecode:: jinja
+
+        {{ data | selectattr('name', '==', 'Jinja') | list | last }}
+    """
+    try:
+        return next(iter(reversed(seq)))
+    except StopIteration:
+        return environment.undefined("No last item, sequence was empty.")
+
+
+# No async do_last, it may not be safe in async mode.
+
+
+@pass_context
+def do_random(context: "Context", seq: "t.Sequence[V]") -> "t.Union[V, Undefined]":
+    """Return a random item from the sequence."""
+    try:
+        return random.choice(seq)
+    except IndexError:
+        return context.environment.undefined("No random item, sequence was empty.")
+
+
+def do_filesizeformat(value: t.Union[str, float, int], binary: bool = False) -> str:
+    """Format the value like a 'human-readable' file size (i.e. 13 kB,
+    4.1 MB, 102 Bytes, etc).  Per default decimal prefixes are used (Mega,
+    Giga, etc.), if the second parameter is set to `True` the binary
+    prefixes are used (Mebi, Gibi).
+    """
+    bytes = float(value)
+    base = 1024 if binary else 1000
+    prefixes = [
+        ("KiB" if binary else "kB"),
+        ("MiB" if binary else "MB"),
+        ("GiB" if binary else "GB"),
+        ("TiB" if binary else "TB"),
+        ("PiB" if binary else "PB"),
+        ("EiB" if binary else "EB"),
+        ("ZiB" if binary else "ZB"),
+        ("YiB" if binary else "YB"),
+    ]
+
+    if bytes == 1:
+        return "1 Byte"
+    elif bytes < base:
+        return f"{int(bytes)} Bytes"
+    else:
+        for i, prefix in enumerate(prefixes):
+            unit = base ** (i + 2)
+
+            if bytes < unit:
+                return f"{base * bytes / unit:.1f} {prefix}"
+
+        return f"{base * bytes / unit:.1f} {prefix}"
+
+
+def do_pprint(value: t.Any) -> str:
+    """Pretty print a variable. Useful for debugging."""
+    return pformat(value)
+
+
+_uri_scheme_re = re.compile(r"^([\w.+-]{2,}:(/){0,2})$")
+
+
+@pass_eval_context
+def do_urlize(
+    eval_ctx: "EvalContext",
+    value: str,
+    trim_url_limit: t.Optional[int] = None,
+    nofollow: bool = False,
+    target: t.Optional[str] = None,
+    rel: t.Optional[str] = None,
+    extra_schemes: t.Optional[t.Iterable[str]] = None,
+) -> str:
+    """Convert URLs in text into clickable links.
+
+    This may not recognize links in some situations. Usually, a more
+    comprehensive formatter, such as a Markdown library, is a better
+    choice.
+
+    Works on ``http://``, ``https://``, ``www.``, ``mailto:``, and email
+    addresses. Links with trailing punctuation (periods, commas, closing
+    parentheses) and leading punctuation (opening parentheses) are
+    recognized excluding the punctuation. Email addresses that include
+    header fields are not recognized (for example,
+    ``mailto:address@example.com?cc=copy@example.com``).
+
+    :param value: Original text containing URLs to link.
+    :param trim_url_limit: Shorten displayed URL values to this length.
+    :param nofollow: Add the ``rel=nofollow`` attribute to links.
+    :param target: Add the ``target`` attribute to links.
+    :param rel: Add the ``rel`` attribute to links.
+    :param extra_schemes: Recognize URLs that start with these schemes
+        in addition to the default behavior. Defaults to
+        ``env.policies["urlize.extra_schemes"]``, which defaults to no
+        extra schemes.
+
+    .. versionchanged:: 3.0
+        The ``extra_schemes`` parameter was added.
+
+    .. versionchanged:: 3.0
+        Generate ``https://`` links for URLs without a scheme.
+
+    .. versionchanged:: 3.0
+        The parsing rules were updated. Recognize email addresses with
+        or without the ``mailto:`` scheme. Validate IP addresses. Ignore
+        parentheses and brackets in more cases.
+
+    .. versionchanged:: 2.8
+       The ``target`` parameter was added.
+    """
+    policies = eval_ctx.environment.policies
+    rel_parts = set((rel or "").split())
+
+    if nofollow:
+        rel_parts.add("nofollow")
+
+    rel_parts.update((policies["urlize.rel"] or "").split())
+    rel = " ".join(sorted(rel_parts)) or None
+
+    if target is None:
+        target = policies["urlize.target"]
+
+    if extra_schemes is None:
+        extra_schemes = policies["urlize.extra_schemes"] or ()
+
+    for scheme in extra_schemes:
+        if _uri_scheme_re.fullmatch(scheme) is None:
+            raise FilterArgumentError(f"{scheme!r} is not a valid URI scheme prefix.")
+
+    rv = urlize(
+        value,
+        trim_url_limit=trim_url_limit,
+        rel=rel,
+        target=target,
+        extra_schemes=extra_schemes,
+    )
+
+    if eval_ctx.autoescape:
+        rv = Markup(rv)
+
+    return rv
+
+
+def do_indent(
+    s: str, width: t.Union[int, str] = 4, first: bool = False, blank: bool = False
+) -> str:
+    """Return a copy of the string with each line indented by 4 spaces. The
+    first line and blank lines are not indented by default.
+
+    :param width: Number of spaces, or a string, to indent by.
+    :param first: Don't skip indenting the first line.
+    :param blank: Don't skip indenting empty lines.
+
+    .. versionchanged:: 3.0
+        ``width`` can be a string.
+
+    .. versionchanged:: 2.10
+        Blank lines are not indented by default.
+
+        Rename the ``indentfirst`` argument to ``first``.
+    """
+    if isinstance(width, str):
+        indention = width
+    else:
+        indention = " " * width
+
+    newline = "\n"
+
+    if isinstance(s, Markup):
+        indention = Markup(indention)
+        newline = Markup(newline)
+
+    s += newline  # this quirk is necessary for splitlines method
+
+    if blank:
+        rv = (newline + indention).join(s.splitlines())
+    else:
+        lines = s.splitlines()
+        rv = lines.pop(0)
+
+        if lines:
+            rv += newline + newline.join(
+                indention + line if line else line for line in lines
+            )
+
+    if first:
+        rv = indention + rv
+
+    return rv
+
+
+@pass_environment
+def do_truncate(
+    env: "Environment",
+    s: str,
+    length: int = 255,
+    killwords: bool = False,
+    end: str = "...",
+    leeway: t.Optional[int] = None,
+) -> str:
+    """Return a truncated copy of the string. The length is specified
+    with the first parameter which defaults to ``255``. If the second
+    parameter is ``true`` the filter will cut the text at length. Otherwise
+    it will discard the last word. If the text was in fact
+    truncated it will append an ellipsis sign (``"..."``). If you want a
+    different ellipsis sign than ``"..."`` you can specify it using the
+    third parameter. Strings that only exceed the length by the tolerance
+    margin given in the fourth parameter will not be truncated.
+
+    .. sourcecode:: jinja
+
+        {{ "foo bar baz qux"|truncate(9) }}
+            -> "foo..."
+        {{ "foo bar baz qux"|truncate(9, True) }}
+            -> "foo ba..."
+        {{ "foo bar baz qux"|truncate(11) }}
+            -> "foo bar baz qux"
+        {{ "foo bar baz qux"|truncate(11, False, '...', 0) }}
+            -> "foo bar..."
+
+    The default leeway on newer Jinja versions is 5 and was 0 before but
+    can be reconfigured globally.
+    """
+    if leeway is None:
+        leeway = env.policies["truncate.leeway"]
+
+    assert length >= len(end), f"expected length >= {len(end)}, got {length}"
+    assert leeway >= 0, f"expected leeway >= 0, got {leeway}"
+
+    if len(s) <= length + leeway:
+        return s
+
+    if killwords:
+        return s[: length - len(end)] + end
+
+    result = s[: length - len(end)].rsplit(" ", 1)[0]
+    return result + end
+
+
+@pass_environment
+def do_wordwrap(
+    environment: "Environment",
+    s: str,
+    width: int = 79,
+    break_long_words: bool = True,
+    wrapstring: t.Optional[str] = None,
+    break_on_hyphens: bool = True,
+) -> str:
+    """Wrap a string to the given width. Existing newlines are treated
+    as paragraphs to be wrapped separately.
+
+    :param s: Original text to wrap.
+    :param width: Maximum length of wrapped lines.
+    :param break_long_words: If a word is longer than ``width``, break
+        it across lines.
+    :param break_on_hyphens: If a word contains hyphens, it may be split
+        across lines.
+    :param wrapstring: String to join each wrapped line. Defaults to
+        :attr:`Environment.newline_sequence`.
+
+    .. versionchanged:: 2.11
+        Existing newlines are treated as paragraphs wrapped separately.
+
+    .. versionchanged:: 2.11
+        Added the ``break_on_hyphens`` parameter.
+
+    .. versionchanged:: 2.7
+        Added the ``wrapstring`` parameter.
+    """
+    import textwrap
+
+    if wrapstring is None:
+        wrapstring = environment.newline_sequence
+
+    # textwrap.wrap doesn't consider existing newlines when wrapping.
+    # If the string has a newline before width, wrap will still insert
+    # a newline at width, resulting in a short line. Instead, split and
+    # wrap each paragraph individually.
+    return wrapstring.join(
+        [
+            wrapstring.join(
+                textwrap.wrap(
+                    line,
+                    width=width,
+                    expand_tabs=False,
+                    replace_whitespace=False,
+                    break_long_words=break_long_words,
+                    break_on_hyphens=break_on_hyphens,
+                )
+            )
+            for line in s.splitlines()
+        ]
+    )
+
+
+_word_re = re.compile(r"\w+")
+
+
+def do_wordcount(s: str) -> int:
+    """Count the words in that string."""
+    return len(_word_re.findall(soft_str(s)))
+
+
+def do_int(value: t.Any, default: int = 0, base: int = 10) -> int:
+    """Convert the value into an integer. If the
+    conversion doesn't work it will return ``0``. You can
+    override this default using the first parameter. You
+    can also override the default base (10) in the second
+    parameter, which handles input with prefixes such as
+    0b, 0o and 0x for bases 2, 8 and 16 respectively.
+    The base is ignored for decimal numbers and non-string values.
+    """
+    try:
+        if isinstance(value, str):
+            return int(value, base)
+
+        return int(value)
+    except (TypeError, ValueError):
+        # this quirk is necessary so that "42.23"|int gives 42.
+        try:
+            return int(float(value))
+        except (TypeError, ValueError):
+            return default
+
+
+def do_float(value: t.Any, default: float = 0.0) -> float:
+    """Convert the value into a floating point number. If the
+    conversion doesn't work it will return ``0.0``. You can
+    override this default using the first parameter.
+    """
+    try:
+        return float(value)
+    except (TypeError, ValueError):
+        return default
+
+
+def do_format(value: str, *args: t.Any, **kwargs: t.Any) -> str:
+    """Apply the given values to a `printf-style`_ format string, like
+    ``string % values``.
+
+    .. sourcecode:: jinja
+
+        {{ "%s, %s!"|format(greeting, name) }}
+        Hello, World!
+
+    In most cases it should be more convenient and efficient to use the
+    ``%`` operator or :meth:`str.format`.
+
+    .. code-block:: text
+
+        {{ "%s, %s!" % (greeting, name) }}
+        {{ "{}, {}!".format(greeting, name) }}
+
+    .. _printf-style: https://docs.python.org/library/stdtypes.html
+        #printf-style-string-formatting
+    """
+    if args and kwargs:
+        raise FilterArgumentError(
+            "can't handle positional and keyword arguments at the same time"
+        )
+
+    return soft_str(value) % (kwargs or args)
+
+
+def do_trim(value: str, chars: t.Optional[str] = None) -> str:
+    """Strip leading and trailing characters, by default whitespace."""
+    return soft_str(value).strip(chars)
+
+
+def do_striptags(value: "t.Union[str, HasHTML]") -> str:
+    """Strip SGML/XML tags and replace adjacent whitespace by one space."""
+    if hasattr(value, "__html__"):
+        value = t.cast("HasHTML", value).__html__()
+
+    return Markup(str(value)).striptags()
+
+
+def sync_do_slice(
+    value: "t.Collection[V]", slices: int, fill_with: "t.Optional[V]" = None
+) -> "t.Iterator[t.List[V]]":
+    """Slice an iterator and return a list of lists containing
+    those items. Useful if you want to create a div containing
+    three ul tags that represent columns:
+
+    .. sourcecode:: html+jinja
+
+        <div class="columnwrapper">
+          {%- for column in items|slice(3) %}
+            <ul class="column-{{ loop.index }}">
+            {%- for item in column %}
+              <li>{{ item }}</li>
+            {%- endfor %}
+            </ul>
+          {%- endfor %}
+        </div>
+
+    If you pass it a second argument it's used to fill missing
+    values on the last iteration.
+    """
+    seq = list(value)
+    length = len(seq)
+    items_per_slice = length // slices
+    slices_with_extra = length % slices
+    offset = 0
+
+    for slice_number in range(slices):
+        start = offset + slice_number * items_per_slice
+
+        if slice_number < slices_with_extra:
+            offset += 1
+
+        end = offset + (slice_number + 1) * items_per_slice
+        tmp = seq[start:end]
+
+        if fill_with is not None and slice_number >= slices_with_extra:
+            tmp.append(fill_with)
+
+        yield tmp
+
+
+@async_variant(sync_do_slice)  # type: ignore
+async def do_slice(
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    slices: int,
+    fill_with: t.Optional[t.Any] = None,
+) -> "t.Iterator[t.List[V]]":
+    return sync_do_slice(await auto_to_list(value), slices, fill_with)
+
+
+def do_batch(
+    value: "t.Iterable[V]", linecount: int, fill_with: "t.Optional[V]" = None
+) -> "t.Iterator[t.List[V]]":
+    """
+    A filter that batches items. It works pretty much like `slice`
+    just the other way round. It returns a list of lists with the
+    given number of items. If you provide a second parameter this
+    is used to fill up missing items. See this example:
+
+    .. sourcecode:: html+jinja
+
+        <table>
+        {%- for row in items|batch(3, '&nbsp;') %}
+          <tr>
+          {%- for column in row %}
+            <td>{{ column }}</td>
+          {%- endfor %}
+          </tr>
+        {%- endfor %}
+        </table>
+    """
+    tmp: "t.List[V]" = []
+
+    for item in value:
+        if len(tmp) == linecount:
+            yield tmp
+            tmp = []
+
+        tmp.append(item)
+
+    if tmp:
+        if fill_with is not None and len(tmp) < linecount:
+            tmp += [fill_with] * (linecount - len(tmp))
+
+        yield tmp
+
+
+def do_round(
+    value: float,
+    precision: int = 0,
+    method: 'te.Literal["common", "ceil", "floor"]' = "common",
+) -> float:
+    """Round the number to a given precision. The first
+    parameter specifies the precision (default is ``0``), the
+    second the rounding method:
+
+    - ``'common'`` rounds either up or down
+    - ``'ceil'`` always rounds up
+    - ``'floor'`` always rounds down
+
+    If you don't specify a method ``'common'`` is used.
+
+    .. sourcecode:: jinja
+
+        {{ 42.55|round }}
+            -> 43.0
+        {{ 42.55|round(1, 'floor') }}
+            -> 42.5
+
+    Note that even if rounded to 0 precision, a float is returned.  If
+    you need a real integer, pipe it through `int`:
+
+    .. sourcecode:: jinja
+
+        {{ 42.55|round|int }}
+            -> 43
+    """
+    if method not in {"common", "ceil", "floor"}:
+        raise FilterArgumentError("method must be common, ceil or floor")
+
+    if method == "common":
+        return round(value, precision)
+
+    func = getattr(math, method)
+    return t.cast(float, func(value * (10**precision)) / (10**precision))
+
+
+class _GroupTuple(t.NamedTuple):
+    grouper: t.Any
+    list: t.List
+
+    # Use the regular tuple repr to hide this subclass if users print
+    # out the value during debugging.
+    def __repr__(self) -> str:
+        return tuple.__repr__(self)
+
+    def __str__(self) -> str:
+        return tuple.__str__(self)
+
+
+@pass_environment
+def sync_do_groupby(
+    environment: "Environment",
+    value: "t.Iterable[V]",
+    attribute: t.Union[str, int],
+    default: t.Optional[t.Any] = None,
+    case_sensitive: bool = False,
+) -> "t.List[_GroupTuple]":
+    """Group a sequence of objects by an attribute using Python's
+    :func:`itertools.groupby`. The attribute can use dot notation for
+    nested access, like ``"address.city"``. Unlike Python's ``groupby``,
+    the values are sorted first so only one group is returned for each
+    unique value.
+
+    For example, a list of ``User`` objects with a ``city`` attribute
+    can be rendered in groups. In this example, ``grouper`` refers to
+    the ``city`` value of the group.
+
+    .. sourcecode:: html+jinja
+
+        <ul>{% for city, items in users|groupby("city") %}
+          <li>{{ city }}
+            <ul>{% for user in items %}
+              <li>{{ user.name }}
+            {% endfor %}</ul>
+          </li>
+        {% endfor %}</ul>
+
+    ``groupby`` yields namedtuples of ``(grouper, list)``, which
+    can be used instead of the tuple unpacking above. ``grouper`` is the
+    value of the attribute, and ``list`` is the items with that value.
+
+    .. sourcecode:: html+jinja
+
+        <ul>{% for group in users|groupby("city") %}
+          <li>{{ group.grouper }}: {{ group.list|join(", ") }}
+        {% endfor %}</ul>
+
+    You can specify a ``default`` value to use if an object in the list
+    does not have the given attribute.
+
+    .. sourcecode:: jinja
+
+        <ul>{% for city, items in users|groupby("city", default="NY") %}
+          <li>{{ city }}: {{ items|map(attribute="name")|join(", ") }}</li>
+        {% endfor %}</ul>
+
+    Like the :func:`~jinja-filters.sort` filter, sorting and grouping is
+    case-insensitive by default. The ``key`` for each group will have
+    the case of the first item in that group of values. For example, if
+    a list of users has cities ``["CA", "NY", "ca"]``, the "CA" group
+    will have two values. This can be disabled by passing
+    ``case_sensitive=True``.
+
+    .. versionchanged:: 3.1
+        Added the ``case_sensitive`` parameter. Sorting and grouping is
+        case-insensitive by default, matching other filters that do
+        comparisons.
+
+    .. versionchanged:: 3.0
+        Added the ``default`` parameter.
+
+    .. versionchanged:: 2.6
+        The attribute supports dot notation for nested access.
+    """
+    expr = make_attrgetter(
+        environment,
+        attribute,
+        postprocess=ignore_case if not case_sensitive else None,
+        default=default,
+    )
+    out = [
+        _GroupTuple(key, list(values))
+        for key, values in groupby(sorted(value, key=expr), expr)
+    ]
+
+    if not case_sensitive:
+        # Return the real key from the first value instead of the lowercase key.
+        output_expr = make_attrgetter(environment, attribute, default=default)
+        out = [_GroupTuple(output_expr(values[0]), values) for _, values in out]
+
+    return out
+
+
+@async_variant(sync_do_groupby)  # type: ignore
+async def do_groupby(
+    environment: "Environment",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    attribute: t.Union[str, int],
+    default: t.Optional[t.Any] = None,
+    case_sensitive: bool = False,
+) -> "t.List[_GroupTuple]":
+    expr = make_attrgetter(
+        environment,
+        attribute,
+        postprocess=ignore_case if not case_sensitive else None,
+        default=default,
+    )
+    out = [
+        _GroupTuple(key, await auto_to_list(values))
+        for key, values in groupby(sorted(await auto_to_list(value), key=expr), expr)
+    ]
+
+    if not case_sensitive:
+        # Return the real key from the first value instead of the lowercase key.
+        output_expr = make_attrgetter(environment, attribute, default=default)
+        out = [_GroupTuple(output_expr(values[0]), values) for _, values in out]
+
+    return out
+
+
+@pass_environment
+def sync_do_sum(
+    environment: "Environment",
+    iterable: "t.Iterable[V]",
+    attribute: t.Optional[t.Union[str, int]] = None,
+    start: V = 0,  # type: ignore
+) -> V:
+    """Returns the sum of a sequence of numbers plus the value of parameter
+    'start' (which defaults to 0).  When the sequence is empty it returns
+    start.
+
+    It is also possible to sum up only certain attributes:
+
+    .. sourcecode:: jinja
+
+        Total: {{ items|sum(attribute='price') }}
+
+    .. versionchanged:: 2.6
+       The ``attribute`` parameter was added to allow summing up over
+       attributes.  Also the ``start`` parameter was moved on to the right.
+    """
+    if attribute is not None:
+        iterable = map(make_attrgetter(environment, attribute), iterable)
+
+    return sum(iterable, start)  # type: ignore[no-any-return, call-overload]
+
+
+@async_variant(sync_do_sum)  # type: ignore
+async def do_sum(
+    environment: "Environment",
+    iterable: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    attribute: t.Optional[t.Union[str, int]] = None,
+    start: V = 0,  # type: ignore
+) -> V:
+    rv = start
+
+    if attribute is not None:
+        func = make_attrgetter(environment, attribute)
+    else:
+
+        def func(x: V) -> V:
+            return x
+
+    async for item in auto_aiter(iterable):
+        rv += func(item)
+
+    return rv
+
+
+def sync_do_list(value: "t.Iterable[V]") -> "t.List[V]":
+    """Convert the value into a list.  If it was a string the returned list
+    will be a list of characters.
+    """
+    return list(value)
+
+
+@async_variant(sync_do_list)  # type: ignore
+async def do_list(value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]") -> "t.List[V]":
+    return await auto_to_list(value)
+
+
+def do_mark_safe(value: str) -> Markup:
+    """Mark the value as safe which means that in an environment with automatic
+    escaping enabled this variable will not be escaped.
+    """
+    return Markup(value)
+
+
+def do_mark_unsafe(value: str) -> str:
+    """Mark a value as unsafe.  This is the reverse operation for :func:`safe`."""
+    return str(value)
+
+
+@typing.overload
+def do_reverse(value: str) -> str:
+    ...
+
+
+@typing.overload
+def do_reverse(value: "t.Iterable[V]") -> "t.Iterable[V]":
+    ...
+
+
+def do_reverse(value: t.Union[str, t.Iterable[V]]) -> t.Union[str, t.Iterable[V]]:
+    """Reverse the object or return an iterator that iterates over it the other
+    way round.
+    """
+    if isinstance(value, str):
+        return value[::-1]
+
+    try:
+        return reversed(value)  # type: ignore
+    except TypeError:
+        try:
+            rv = list(value)
+            rv.reverse()
+            return rv
+        except TypeError as e:
+            raise FilterArgumentError("argument must be iterable") from e
+
+
+@pass_environment
+def do_attr(
+    environment: "Environment", obj: t.Any, name: str
+) -> t.Union[Undefined, t.Any]:
+    """Get an attribute of an object.  ``foo|attr("bar")`` works like
+    ``foo.bar`` just that always an attribute is returned and items are not
+    looked up.
+
+    See :ref:`Notes on subscriptions <notes-on-subscriptions>` for more details.
+    """
+    try:
+        name = str(name)
+    except UnicodeError:
+        pass
+    else:
+        try:
+            value = getattr(obj, name)
+        except AttributeError:
+            pass
+        else:
+            if environment.sandboxed:
+                environment = t.cast("SandboxedEnvironment", environment)
+
+                if not environment.is_safe_attribute(obj, name, value):
+                    return environment.unsafe_undefined(obj, name)
+
+            return value
+
+    return environment.undefined(obj=obj, name=name)
+
+
+@typing.overload
+def sync_do_map(
+    context: "Context", value: t.Iterable, name: str, *args: t.Any, **kwargs: t.Any
+) -> t.Iterable:
+    ...
+
+
+@typing.overload
+def sync_do_map(
+    context: "Context",
+    value: t.Iterable,
+    *,
+    attribute: str = ...,
+    default: t.Optional[t.Any] = None,
+) -> t.Iterable:
+    ...
+
+
+@pass_context
+def sync_do_map(
+    context: "Context", value: t.Iterable, *args: t.Any, **kwargs: t.Any
+) -> t.Iterable:
+    """Applies a filter on a sequence of objects or looks up an attribute.
+    This is useful when dealing with lists of objects but you are really
+    only interested in a certain value of it.
+
+    The basic usage is mapping on an attribute.  Imagine you have a list
+    of users but you are only interested in a list of usernames:
+
+    .. sourcecode:: jinja
+
+        Users on this page: {{ users|map(attribute='username')|join(', ') }}
+
+    You can specify a ``default`` value to use if an object in the list
+    does not have the given attribute.
+
+    .. sourcecode:: jinja
+
+        {{ users|map(attribute="username", default="Anonymous")|join(", ") }}
+
+    Alternatively you can let it invoke a filter by passing the name of the
+    filter and the arguments afterwards.  A good example would be applying a
+    text conversion filter on a sequence:
+
+    .. sourcecode:: jinja
+
+        Users on this page: {{ titles|map('lower')|join(', ') }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u.username for u in users)
+        (getattr(u, "username", "Anonymous") for u in users)
+        (do_lower(x) for x in titles)
+
+    .. versionchanged:: 2.11.0
+        Added the ``default`` parameter.
+
+    .. versionadded:: 2.7
+    """
+    if value:
+        func = prepare_map(context, args, kwargs)
+
+        for item in value:
+            yield func(item)
+
+
+@typing.overload
+def do_map(
+    context: "Context",
+    value: t.Union[t.AsyncIterable, t.Iterable],
+    name: str,
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> t.Iterable:
+    ...
+
+
+@typing.overload
+def do_map(
+    context: "Context",
+    value: t.Union[t.AsyncIterable, t.Iterable],
+    *,
+    attribute: str = ...,
+    default: t.Optional[t.Any] = None,
+) -> t.Iterable:
+    ...
+
+
+@async_variant(sync_do_map)  # type: ignore
+async def do_map(
+    context: "Context",
+    value: t.Union[t.AsyncIterable, t.Iterable],
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> t.AsyncIterable:
+    if value:
+        func = prepare_map(context, args, kwargs)
+
+        async for item in auto_aiter(value):
+            yield await auto_await(func(item))
+
+
+@pass_context
+def sync_do_select(
+    context: "Context", value: "t.Iterable[V]", *args: t.Any, **kwargs: t.Any
+) -> "t.Iterator[V]":
+    """Filters a sequence of objects by applying a test to each object,
+    and only selecting the objects with the test succeeding.
+
+    If no test is specified, each object will be evaluated as a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ numbers|select("odd") }}
+        {{ numbers|select("odd") }}
+        {{ numbers|select("divisibleby", 3) }}
+        {{ numbers|select("lessthan", 42) }}
+        {{ strings|select("equalto", "mystring") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (n for n in numbers if test_odd(n))
+        (n for n in numbers if test_divisibleby(n, 3))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(context, value, args, kwargs, lambda x: x, False)
+
+
+@async_variant(sync_do_select)  # type: ignore
+async def do_select(
+    context: "Context",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> "t.AsyncIterator[V]":
+    return async_select_or_reject(context, value, args, kwargs, lambda x: x, False)
+
+
+@pass_context
+def sync_do_reject(
+    context: "Context", value: "t.Iterable[V]", *args: t.Any, **kwargs: t.Any
+) -> "t.Iterator[V]":
+    """Filters a sequence of objects by applying a test to each object,
+    and rejecting the objects with the test succeeding.
+
+    If no test is specified, each object will be evaluated as a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ numbers|reject("odd") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (n for n in numbers if not test_odd(n))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(context, value, args, kwargs, lambda x: not x, False)
+
+
+@async_variant(sync_do_reject)  # type: ignore
+async def do_reject(
+    context: "Context",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> "t.AsyncIterator[V]":
+    return async_select_or_reject(context, value, args, kwargs, lambda x: not x, False)
+
+
+@pass_context
+def sync_do_selectattr(
+    context: "Context", value: "t.Iterable[V]", *args: t.Any, **kwargs: t.Any
+) -> "t.Iterator[V]":
+    """Filters a sequence of objects by applying a test to the specified
+    attribute of each object, and only selecting the objects with the
+    test succeeding.
+
+    If no test is specified, the attribute's value will be evaluated as
+    a boolean.
+
+    Example usage:
+
+    .. sourcecode:: jinja
+
+        {{ users|selectattr("is_active") }}
+        {{ users|selectattr("email", "none") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u for user in users if user.is_active)
+        (u for user in users if test_none(user.email))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(context, value, args, kwargs, lambda x: x, True)
+
+
+@async_variant(sync_do_selectattr)  # type: ignore
+async def do_selectattr(
+    context: "Context",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> "t.AsyncIterator[V]":
+    return async_select_or_reject(context, value, args, kwargs, lambda x: x, True)
+
+
+@pass_context
+def sync_do_rejectattr(
+    context: "Context", value: "t.Iterable[V]", *args: t.Any, **kwargs: t.Any
+) -> "t.Iterator[V]":
+    """Filters a sequence of objects by applying a test to the specified
+    attribute of each object, and rejecting the objects with the test
+    succeeding.
+
+    If no test is specified, the attribute's value will be evaluated as
+    a boolean.
+
+    .. sourcecode:: jinja
+
+        {{ users|rejectattr("is_active") }}
+        {{ users|rejectattr("email", "none") }}
+
+    Similar to a generator comprehension such as:
+
+    .. code-block:: python
+
+        (u for user in users if not user.is_active)
+        (u for user in users if not test_none(user.email))
+
+    .. versionadded:: 2.7
+    """
+    return select_or_reject(context, value, args, kwargs, lambda x: not x, True)
+
+
+@async_variant(sync_do_rejectattr)  # type: ignore
+async def do_rejectattr(
+    context: "Context",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    *args: t.Any,
+    **kwargs: t.Any,
+) -> "t.AsyncIterator[V]":
+    return async_select_or_reject(context, value, args, kwargs, lambda x: not x, True)
+
+
+@pass_eval_context
+def do_tojson(
+    eval_ctx: "EvalContext", value: t.Any, indent: t.Optional[int] = None
+) -> Markup:
+    """Serialize an object to a string of JSON, and mark it safe to
+    render in HTML. This filter is only for use in HTML documents.
+
+    The returned string is safe to render in HTML documents and
+    ``<script>`` tags. The exception is in HTML attributes that are
+    double quoted; either use single quotes or the ``|forceescape``
+    filter.
+
+    :param value: The object to serialize to JSON.
+    :param indent: The ``indent`` parameter passed to ``dumps``, for
+        pretty-printing the value.
+
+    .. versionadded:: 2.9
+    """
+    policies = eval_ctx.environment.policies
+    dumps = policies["json.dumps_function"]
+    kwargs = policies["json.dumps_kwargs"]
+
+    if indent is not None:
+        kwargs = kwargs.copy()
+        kwargs["indent"] = indent
+
+    return htmlsafe_json_dumps(value, dumps=dumps, **kwargs)
+
+
+def prepare_map(
+    context: "Context", args: t.Tuple, kwargs: t.Dict[str, t.Any]
+) -> t.Callable[[t.Any], t.Any]:
+    if not args and "attribute" in kwargs:
+        attribute = kwargs.pop("attribute")
+        default = kwargs.pop("default", None)
+
+        if kwargs:
+            raise FilterArgumentError(
+                f"Unexpected keyword argument {next(iter(kwargs))!r}"
+            )
+
+        func = make_attrgetter(context.environment, attribute, default=default)
+    else:
+        try:
+            name = args[0]
+            args = args[1:]
+        except LookupError:
+            raise FilterArgumentError("map requires a filter argument") from None
+
+        def func(item: t.Any) -> t.Any:
+            return context.environment.call_filter(
+                name, item, args, kwargs, context=context
+            )
+
+    return func
+
+
+def prepare_select_or_reject(
+    context: "Context",
+    args: t.Tuple,
+    kwargs: t.Dict[str, t.Any],
+    modfunc: t.Callable[[t.Any], t.Any],
+    lookup_attr: bool,
+) -> t.Callable[[t.Any], t.Any]:
+    if lookup_attr:
+        try:
+            attr = args[0]
+        except LookupError:
+            raise FilterArgumentError("Missing parameter for attribute name") from None
+
+        transfunc = make_attrgetter(context.environment, attr)
+        off = 1
+    else:
+        off = 0
+
+        def transfunc(x: V) -> V:
+            return x
+
+    try:
+        name = args[off]
+        args = args[1 + off :]
+
+        def func(item: t.Any) -> t.Any:
+            return context.environment.call_test(name, item, args, kwargs)
+
+    except LookupError:
+        func = bool  # type: ignore
+
+    return lambda item: modfunc(func(transfunc(item)))
+
+
+def select_or_reject(
+    context: "Context",
+    value: "t.Iterable[V]",
+    args: t.Tuple,
+    kwargs: t.Dict[str, t.Any],
+    modfunc: t.Callable[[t.Any], t.Any],
+    lookup_attr: bool,
+) -> "t.Iterator[V]":
+    if value:
+        func = prepare_select_or_reject(context, args, kwargs, modfunc, lookup_attr)
+
+        for item in value:
+            if func(item):
+                yield item
+
+
+async def async_select_or_reject(
+    context: "Context",
+    value: "t.Union[t.AsyncIterable[V], t.Iterable[V]]",
+    args: t.Tuple,
+    kwargs: t.Dict[str, t.Any],
+    modfunc: t.Callable[[t.Any], t.Any],
+    lookup_attr: bool,
+) -> "t.AsyncIterator[V]":
+    if value:
+        func = prepare_select_or_reject(context, args, kwargs, modfunc, lookup_attr)
+
+        async for item in auto_aiter(value):
+            if func(item):
+                yield item
+
+
+FILTERS = {
+    "abs": abs,
+    "attr": do_attr,
+    "batch": do_batch,
+    "capitalize": do_capitalize,
+    "center": do_center,
+    "count": len,
+    "d": do_default,
+    "default": do_default,
+    "dictsort": do_dictsort,
+    "e": escape,
+    "escape": escape,
+    "filesizeformat": do_filesizeformat,
+    "first": do_first,
+    "float": do_float,
+    "forceescape": do_forceescape,
+    "format": do_format,
+    "groupby": do_groupby,
+    "indent": do_indent,
+    "int": do_int,
+    "join": do_join,
+    "last": do_last,
+    "length": len,
+    "list": do_list,
+    "lower": do_lower,
+    "items": do_items,
+    "map": do_map,
+    "min": do_min,
+    "max": do_max,
+    "pprint": do_pprint,
+    "random": do_random,
+    "reject": do_reject,
+    "rejectattr": do_rejectattr,
+    "replace": do_replace,
+    "reverse": do_reverse,
+    "round": do_round,
+    "safe": do_mark_safe,
+    "select": do_select,
+    "selectattr": do_selectattr,
+    "slice": do_slice,
+    "sort": do_sort,
+    "string": soft_str,
+    "striptags": do_striptags,
+    "sum": do_sum,
+    "title": do_title,
+    "trim": do_trim,
+    "truncate": do_truncate,
+    "unique": do_unique,
+    "upper": do_upper,
+    "urlencode": do_urlencode,
+    "urlize": do_urlize,
+    "wordcount": do_wordcount,
+    "wordwrap": do_wordwrap,
+    "xmlattr": do_xmlattr,
+    "tojson": do_tojson,
+}
diff --git a/venv/lib/python3.9/site-packages/jinja2/idtracking.py b/venv/lib/python3.9/site-packages/jinja2/idtracking.py
new file mode 100644
index 0000000..995ebaa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/idtracking.py
@@ -0,0 +1,318 @@
+import typing as t
+
+from . import nodes
+from .visitor import NodeVisitor
+
+VAR_LOAD_PARAMETER = "param"
+VAR_LOAD_RESOLVE = "resolve"
+VAR_LOAD_ALIAS = "alias"
+VAR_LOAD_UNDEFINED = "undefined"
+
+
+def find_symbols(
+    nodes: t.Iterable[nodes.Node], parent_symbols: t.Optional["Symbols"] = None
+) -> "Symbols":
+    sym = Symbols(parent=parent_symbols)
+    visitor = FrameSymbolVisitor(sym)
+    for node in nodes:
+        visitor.visit(node)
+    return sym
+
+
+def symbols_for_node(
+    node: nodes.Node, parent_symbols: t.Optional["Symbols"] = None
+) -> "Symbols":
+    sym = Symbols(parent=parent_symbols)
+    sym.analyze_node(node)
+    return sym
+
+
+class Symbols:
+    def __init__(
+        self, parent: t.Optional["Symbols"] = None, level: t.Optional[int] = None
+    ) -> None:
+        if level is None:
+            if parent is None:
+                level = 0
+            else:
+                level = parent.level + 1
+
+        self.level: int = level
+        self.parent = parent
+        self.refs: t.Dict[str, str] = {}
+        self.loads: t.Dict[str, t.Any] = {}
+        self.stores: t.Set[str] = set()
+
+    def analyze_node(self, node: nodes.Node, **kwargs: t.Any) -> None:
+        visitor = RootVisitor(self)
+        visitor.visit(node, **kwargs)
+
+    def _define_ref(
+        self, name: str, load: t.Optional[t.Tuple[str, t.Optional[str]]] = None
+    ) -> str:
+        ident = f"l_{self.level}_{name}"
+        self.refs[name] = ident
+        if load is not None:
+            self.loads[ident] = load
+        return ident
+
+    def find_load(self, target: str) -> t.Optional[t.Any]:
+        if target in self.loads:
+            return self.loads[target]
+
+        if self.parent is not None:
+            return self.parent.find_load(target)
+
+        return None
+
+    def find_ref(self, name: str) -> t.Optional[str]:
+        if name in self.refs:
+            return self.refs[name]
+
+        if self.parent is not None:
+            return self.parent.find_ref(name)
+
+        return None
+
+    def ref(self, name: str) -> str:
+        rv = self.find_ref(name)
+        if rv is None:
+            raise AssertionError(
+                "Tried to resolve a name to a reference that was"
+                f" unknown to the frame ({name!r})"
+            )
+        return rv
+
+    def copy(self) -> "Symbols":
+        rv = object.__new__(self.__class__)
+        rv.__dict__.update(self.__dict__)
+        rv.refs = self.refs.copy()
+        rv.loads = self.loads.copy()
+        rv.stores = self.stores.copy()
+        return rv
+
+    def store(self, name: str) -> None:
+        self.stores.add(name)
+
+        # If we have not see the name referenced yet, we need to figure
+        # out what to set it to.
+        if name not in self.refs:
+            # If there is a parent scope we check if the name has a
+            # reference there.  If it does it means we might have to alias
+            # to a variable there.
+            if self.parent is not None:
+                outer_ref = self.parent.find_ref(name)
+                if outer_ref is not None:
+                    self._define_ref(name, load=(VAR_LOAD_ALIAS, outer_ref))
+                    return
+
+            # Otherwise we can just set it to undefined.
+            self._define_ref(name, load=(VAR_LOAD_UNDEFINED, None))
+
+    def declare_parameter(self, name: str) -> str:
+        self.stores.add(name)
+        return self._define_ref(name, load=(VAR_LOAD_PARAMETER, None))
+
+    def load(self, name: str) -> None:
+        if self.find_ref(name) is None:
+            self._define_ref(name, load=(VAR_LOAD_RESOLVE, name))
+
+    def branch_update(self, branch_symbols: t.Sequence["Symbols"]) -> None:
+        stores: t.Dict[str, int] = {}
+        for branch in branch_symbols:
+            for target in branch.stores:
+                if target in self.stores:
+                    continue
+                stores[target] = stores.get(target, 0) + 1
+
+        for sym in branch_symbols:
+            self.refs.update(sym.refs)
+            self.loads.update(sym.loads)
+            self.stores.update(sym.stores)
+
+        for name, branch_count in stores.items():
+            if branch_count == len(branch_symbols):
+                continue
+
+            target = self.find_ref(name)  # type: ignore
+            assert target is not None, "should not happen"
+
+            if self.parent is not None:
+                outer_target = self.parent.find_ref(name)
+                if outer_target is not None:
+                    self.loads[target] = (VAR_LOAD_ALIAS, outer_target)
+                    continue
+            self.loads[target] = (VAR_LOAD_RESOLVE, name)
+
+    def dump_stores(self) -> t.Dict[str, str]:
+        rv: t.Dict[str, str] = {}
+        node: t.Optional["Symbols"] = self
+
+        while node is not None:
+            for name in sorted(node.stores):
+                if name not in rv:
+                    rv[name] = self.find_ref(name)  # type: ignore
+
+            node = node.parent
+
+        return rv
+
+    def dump_param_targets(self) -> t.Set[str]:
+        rv = set()
+        node: t.Optional["Symbols"] = self
+
+        while node is not None:
+            for target, (instr, _) in self.loads.items():
+                if instr == VAR_LOAD_PARAMETER:
+                    rv.add(target)
+
+            node = node.parent
+
+        return rv
+
+
+class RootVisitor(NodeVisitor):
+    def __init__(self, symbols: "Symbols") -> None:
+        self.sym_visitor = FrameSymbolVisitor(symbols)
+
+    def _simple_visit(self, node: nodes.Node, **kwargs: t.Any) -> None:
+        for child in node.iter_child_nodes():
+            self.sym_visitor.visit(child)
+
+    visit_Template = _simple_visit
+    visit_Block = _simple_visit
+    visit_Macro = _simple_visit
+    visit_FilterBlock = _simple_visit
+    visit_Scope = _simple_visit
+    visit_If = _simple_visit
+    visit_ScopedEvalContextModifier = _simple_visit
+
+    def visit_AssignBlock(self, node: nodes.AssignBlock, **kwargs: t.Any) -> None:
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def visit_CallBlock(self, node: nodes.CallBlock, **kwargs: t.Any) -> None:
+        for child in node.iter_child_nodes(exclude=("call",)):
+            self.sym_visitor.visit(child)
+
+    def visit_OverlayScope(self, node: nodes.OverlayScope, **kwargs: t.Any) -> None:
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def visit_For(
+        self, node: nodes.For, for_branch: str = "body", **kwargs: t.Any
+    ) -> None:
+        if for_branch == "body":
+            self.sym_visitor.visit(node.target, store_as_param=True)
+            branch = node.body
+        elif for_branch == "else":
+            branch = node.else_
+        elif for_branch == "test":
+            self.sym_visitor.visit(node.target, store_as_param=True)
+            if node.test is not None:
+                self.sym_visitor.visit(node.test)
+            return
+        else:
+            raise RuntimeError("Unknown for branch")
+
+        if branch:
+            for item in branch:
+                self.sym_visitor.visit(item)
+
+    def visit_With(self, node: nodes.With, **kwargs: t.Any) -> None:
+        for target in node.targets:
+            self.sym_visitor.visit(target)
+        for child in node.body:
+            self.sym_visitor.visit(child)
+
+    def generic_visit(self, node: nodes.Node, *args: t.Any, **kwargs: t.Any) -> None:
+        raise NotImplementedError(f"Cannot find symbols for {type(node).__name__!r}")
+
+
+class FrameSymbolVisitor(NodeVisitor):
+    """A visitor for `Frame.inspect`."""
+
+    def __init__(self, symbols: "Symbols") -> None:
+        self.symbols = symbols
+
+    def visit_Name(
+        self, node: nodes.Name, store_as_param: bool = False, **kwargs: t.Any
+    ) -> None:
+        """All assignments to names go through this function."""
+        if store_as_param or node.ctx == "param":
+            self.symbols.declare_parameter(node.name)
+        elif node.ctx == "store":
+            self.symbols.store(node.name)
+        elif node.ctx == "load":
+            self.symbols.load(node.name)
+
+    def visit_NSRef(self, node: nodes.NSRef, **kwargs: t.Any) -> None:
+        self.symbols.load(node.name)
+
+    def visit_If(self, node: nodes.If, **kwargs: t.Any) -> None:
+        self.visit(node.test, **kwargs)
+        original_symbols = self.symbols
+
+        def inner_visit(nodes: t.Iterable[nodes.Node]) -> "Symbols":
+            self.symbols = rv = original_symbols.copy()
+
+            for subnode in nodes:
+                self.visit(subnode, **kwargs)
+
+            self.symbols = original_symbols
+            return rv
+
+        body_symbols = inner_visit(node.body)
+        elif_symbols = inner_visit(node.elif_)
+        else_symbols = inner_visit(node.else_ or ())
+        self.symbols.branch_update([body_symbols, elif_symbols, else_symbols])
+
+    def visit_Macro(self, node: nodes.Macro, **kwargs: t.Any) -> None:
+        self.symbols.store(node.name)
+
+    def visit_Import(self, node: nodes.Import, **kwargs: t.Any) -> None:
+        self.generic_visit(node, **kwargs)
+        self.symbols.store(node.target)
+
+    def visit_FromImport(self, node: nodes.FromImport, **kwargs: t.Any) -> None:
+        self.generic_visit(node, **kwargs)
+
+        for name in node.names:
+            if isinstance(name, tuple):
+                self.symbols.store(name[1])
+            else:
+                self.symbols.store(name)
+
+    def visit_Assign(self, node: nodes.Assign, **kwargs: t.Any) -> None:
+        """Visit assignments in the correct order."""
+        self.visit(node.node, **kwargs)
+        self.visit(node.target, **kwargs)
+
+    def visit_For(self, node: nodes.For, **kwargs: t.Any) -> None:
+        """Visiting stops at for blocks.  However the block sequence
+        is visited as part of the outer scope.
+        """
+        self.visit(node.iter, **kwargs)
+
+    def visit_CallBlock(self, node: nodes.CallBlock, **kwargs: t.Any) -> None:
+        self.visit(node.call, **kwargs)
+
+    def visit_FilterBlock(self, node: nodes.FilterBlock, **kwargs: t.Any) -> None:
+        self.visit(node.filter, **kwargs)
+
+    def visit_With(self, node: nodes.With, **kwargs: t.Any) -> None:
+        for target in node.values:
+            self.visit(target)
+
+    def visit_AssignBlock(self, node: nodes.AssignBlock, **kwargs: t.Any) -> None:
+        """Stop visiting at block assigns."""
+        self.visit(node.target, **kwargs)
+
+    def visit_Scope(self, node: nodes.Scope, **kwargs: t.Any) -> None:
+        """Stop visiting at scopes."""
+
+    def visit_Block(self, node: nodes.Block, **kwargs: t.Any) -> None:
+        """Stop visiting at blocks."""
+
+    def visit_OverlayScope(self, node: nodes.OverlayScope, **kwargs: t.Any) -> None:
+        """Do not visit into overlay scopes."""
diff --git a/venv/lib/python3.9/site-packages/jinja2/lexer.py b/venv/lib/python3.9/site-packages/jinja2/lexer.py
new file mode 100644
index 0000000..aff7e9f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/lexer.py
@@ -0,0 +1,866 @@
+"""Implements a Jinja / Python combination lexer. The ``Lexer`` class
+is used to do some preprocessing. It filters out invalid operators like
+the bitshift operators we don't allow in templates. It separates
+template code and python code in expressions.
+"""
+import re
+import typing as t
+from ast import literal_eval
+from collections import deque
+from sys import intern
+
+from ._identifier import pattern as name_re
+from .exceptions import TemplateSyntaxError
+from .utils import LRUCache
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
+# cache for the lexers. Exists in order to be able to have multiple
+# environments with the same lexer
+_lexer_cache: t.MutableMapping[t.Tuple, "Lexer"] = LRUCache(50)  # type: ignore
+
+# static regular expressions
+whitespace_re = re.compile(r"\s+")
+newline_re = re.compile(r"(\r\n|\r|\n)")
+string_re = re.compile(
+    r"('([^'\\]*(?:\\.[^'\\]*)*)'" r'|"([^"\\]*(?:\\.[^"\\]*)*)")', re.S
+)
+integer_re = re.compile(
+    r"""
+    (
+        0b(_?[0-1])+ # binary
+    |
+        0o(_?[0-7])+ # octal
+    |
+        0x(_?[\da-f])+ # hex
+    |
+        [1-9](_?\d)* # decimal
+    |
+        0(_?0)* # decimal zero
+    )
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
+float_re = re.compile(
+    r"""
+    (?<!\.)  # doesn't start with a .
+    (\d+_)*\d+  # digits, possibly _ separated
+    (
+        (\.(\d+_)*\d+)?  # optional fractional part
+        e[+\-]?(\d+_)*\d+  # exponent part
+    |
+        \.(\d+_)*\d+  # required fractional part
+    )
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
+
+# internal the tokens and keep references to them
+TOKEN_ADD = intern("add")
+TOKEN_ASSIGN = intern("assign")
+TOKEN_COLON = intern("colon")
+TOKEN_COMMA = intern("comma")
+TOKEN_DIV = intern("div")
+TOKEN_DOT = intern("dot")
+TOKEN_EQ = intern("eq")
+TOKEN_FLOORDIV = intern("floordiv")
+TOKEN_GT = intern("gt")
+TOKEN_GTEQ = intern("gteq")
+TOKEN_LBRACE = intern("lbrace")
+TOKEN_LBRACKET = intern("lbracket")
+TOKEN_LPAREN = intern("lparen")
+TOKEN_LT = intern("lt")
+TOKEN_LTEQ = intern("lteq")
+TOKEN_MOD = intern("mod")
+TOKEN_MUL = intern("mul")
+TOKEN_NE = intern("ne")
+TOKEN_PIPE = intern("pipe")
+TOKEN_POW = intern("pow")
+TOKEN_RBRACE = intern("rbrace")
+TOKEN_RBRACKET = intern("rbracket")
+TOKEN_RPAREN = intern("rparen")
+TOKEN_SEMICOLON = intern("semicolon")
+TOKEN_SUB = intern("sub")
+TOKEN_TILDE = intern("tilde")
+TOKEN_WHITESPACE = intern("whitespace")
+TOKEN_FLOAT = intern("float")
+TOKEN_INTEGER = intern("integer")
+TOKEN_NAME = intern("name")
+TOKEN_STRING = intern("string")
+TOKEN_OPERATOR = intern("operator")
+TOKEN_BLOCK_BEGIN = intern("block_begin")
+TOKEN_BLOCK_END = intern("block_end")
+TOKEN_VARIABLE_BEGIN = intern("variable_begin")
+TOKEN_VARIABLE_END = intern("variable_end")
+TOKEN_RAW_BEGIN = intern("raw_begin")
+TOKEN_RAW_END = intern("raw_end")
+TOKEN_COMMENT_BEGIN = intern("comment_begin")
+TOKEN_COMMENT_END = intern("comment_end")
+TOKEN_COMMENT = intern("comment")
+TOKEN_LINESTATEMENT_BEGIN = intern("linestatement_begin")
+TOKEN_LINESTATEMENT_END = intern("linestatement_end")
+TOKEN_LINECOMMENT_BEGIN = intern("linecomment_begin")
+TOKEN_LINECOMMENT_END = intern("linecomment_end")
+TOKEN_LINECOMMENT = intern("linecomment")
+TOKEN_DATA = intern("data")
+TOKEN_INITIAL = intern("initial")
+TOKEN_EOF = intern("eof")
+
+# bind operators to token types
+operators = {
+    "+": TOKEN_ADD,
+    "-": TOKEN_SUB,
+    "/": TOKEN_DIV,
+    "//": TOKEN_FLOORDIV,
+    "*": TOKEN_MUL,
+    "%": TOKEN_MOD,
+    "**": TOKEN_POW,
+    "~": TOKEN_TILDE,
+    "[": TOKEN_LBRACKET,
+    "]": TOKEN_RBRACKET,
+    "(": TOKEN_LPAREN,
+    ")": TOKEN_RPAREN,
+    "{": TOKEN_LBRACE,
+    "}": TOKEN_RBRACE,
+    "==": TOKEN_EQ,
+    "!=": TOKEN_NE,
+    ">": TOKEN_GT,
+    ">=": TOKEN_GTEQ,
+    "<": TOKEN_LT,
+    "<=": TOKEN_LTEQ,
+    "=": TOKEN_ASSIGN,
+    ".": TOKEN_DOT,
+    ":": TOKEN_COLON,
+    "|": TOKEN_PIPE,
+    ",": TOKEN_COMMA,
+    ";": TOKEN_SEMICOLON,
+}
+
+reverse_operators = {v: k for k, v in operators.items()}
+assert len(operators) == len(reverse_operators), "operators dropped"
+operator_re = re.compile(
+    f"({'|'.join(re.escape(x) for x in sorted(operators, key=lambda x: -len(x)))})"
+)
+
+ignored_tokens = frozenset(
+    [
+        TOKEN_COMMENT_BEGIN,
+        TOKEN_COMMENT,
+        TOKEN_COMMENT_END,
+        TOKEN_WHITESPACE,
+        TOKEN_LINECOMMENT_BEGIN,
+        TOKEN_LINECOMMENT_END,
+        TOKEN_LINECOMMENT,
+    ]
+)
+ignore_if_empty = frozenset(
+    [TOKEN_WHITESPACE, TOKEN_DATA, TOKEN_COMMENT, TOKEN_LINECOMMENT]
+)
+
+
+def _describe_token_type(token_type: str) -> str:
+    if token_type in reverse_operators:
+        return reverse_operators[token_type]
+
+    return {
+        TOKEN_COMMENT_BEGIN: "begin of comment",
+        TOKEN_COMMENT_END: "end of comment",
+        TOKEN_COMMENT: "comment",
+        TOKEN_LINECOMMENT: "comment",
+        TOKEN_BLOCK_BEGIN: "begin of statement block",
+        TOKEN_BLOCK_END: "end of statement block",
+        TOKEN_VARIABLE_BEGIN: "begin of print statement",
+        TOKEN_VARIABLE_END: "end of print statement",
+        TOKEN_LINESTATEMENT_BEGIN: "begin of line statement",
+        TOKEN_LINESTATEMENT_END: "end of line statement",
+        TOKEN_DATA: "template data / text",
+        TOKEN_EOF: "end of template",
+    }.get(token_type, token_type)
+
+
+def describe_token(token: "Token") -> str:
+    """Returns a description of the token."""
+    if token.type == TOKEN_NAME:
+        return token.value
+
+    return _describe_token_type(token.type)
+
+
+def describe_token_expr(expr: str) -> str:
+    """Like `describe_token` but for token expressions."""
+    if ":" in expr:
+        type, value = expr.split(":", 1)
+
+        if type == TOKEN_NAME:
+            return value
+    else:
+        type = expr
+
+    return _describe_token_type(type)
+
+
+def count_newlines(value: str) -> int:
+    """Count the number of newline characters in the string.  This is
+    useful for extensions that filter a stream.
+    """
+    return len(newline_re.findall(value))
+
+
+def compile_rules(environment: "Environment") -> t.List[t.Tuple[str, str]]:
+    """Compiles all the rules from the environment into a list of rules."""
+    e = re.escape
+    rules = [
+        (
+            len(environment.comment_start_string),
+            TOKEN_COMMENT_BEGIN,
+            e(environment.comment_start_string),
+        ),
+        (
+            len(environment.block_start_string),
+            TOKEN_BLOCK_BEGIN,
+            e(environment.block_start_string),
+        ),
+        (
+            len(environment.variable_start_string),
+            TOKEN_VARIABLE_BEGIN,
+            e(environment.variable_start_string),
+        ),
+    ]
+
+    if environment.line_statement_prefix is not None:
+        rules.append(
+            (
+                len(environment.line_statement_prefix),
+                TOKEN_LINESTATEMENT_BEGIN,
+                r"^[ \t\v]*" + e(environment.line_statement_prefix),
+            )
+        )
+    if environment.line_comment_prefix is not None:
+        rules.append(
+            (
+                len(environment.line_comment_prefix),
+                TOKEN_LINECOMMENT_BEGIN,
+                r"(?:^|(?<=\S))[^\S\r\n]*" + e(environment.line_comment_prefix),
+            )
+        )
+
+    return [x[1:] for x in sorted(rules, reverse=True)]
+
+
+class Failure:
+    """Class that raises a `TemplateSyntaxError` if called.
+    Used by the `Lexer` to specify known errors.
+    """
+
+    def __init__(
+        self, message: str, cls: t.Type[TemplateSyntaxError] = TemplateSyntaxError
+    ) -> None:
+        self.message = message
+        self.error_class = cls
+
+    def __call__(self, lineno: int, filename: str) -> "te.NoReturn":
+        raise self.error_class(self.message, lineno, filename)
+
+
+class Token(t.NamedTuple):
+    lineno: int
+    type: str
+    value: str
+
+    def __str__(self) -> str:
+        return describe_token(self)
+
+    def test(self, expr: str) -> bool:
+        """Test a token against a token expression.  This can either be a
+        token type or ``'token_type:token_value'``.  This can only test
+        against string values and types.
+        """
+        # here we do a regular string equality check as test_any is usually
+        # passed an iterable of not interned strings.
+        if self.type == expr:
+            return True
+
+        if ":" in expr:
+            return expr.split(":", 1) == [self.type, self.value]
+
+        return False
+
+    def test_any(self, *iterable: str) -> bool:
+        """Test against multiple token expressions."""
+        return any(self.test(expr) for expr in iterable)
+
+
+class TokenStreamIterator:
+    """The iterator for tokenstreams.  Iterate over the stream
+    until the eof token is reached.
+    """
+
+    def __init__(self, stream: "TokenStream") -> None:
+        self.stream = stream
+
+    def __iter__(self) -> "TokenStreamIterator":
+        return self
+
+    def __next__(self) -> Token:
+        token = self.stream.current
+
+        if token.type is TOKEN_EOF:
+            self.stream.close()
+            raise StopIteration
+
+        next(self.stream)
+        return token
+
+
+class TokenStream:
+    """A token stream is an iterable that yields :class:`Token`\\s.  The
+    parser however does not iterate over it but calls :meth:`next` to go
+    one token ahead.  The current active token is stored as :attr:`current`.
+    """
+
+    def __init__(
+        self,
+        generator: t.Iterable[Token],
+        name: t.Optional[str],
+        filename: t.Optional[str],
+    ):
+        self._iter = iter(generator)
+        self._pushed: "te.Deque[Token]" = deque()
+        self.name = name
+        self.filename = filename
+        self.closed = False
+        self.current = Token(1, TOKEN_INITIAL, "")
+        next(self)
+
+    def __iter__(self) -> TokenStreamIterator:
+        return TokenStreamIterator(self)
+
+    def __bool__(self) -> bool:
+        return bool(self._pushed) or self.current.type is not TOKEN_EOF
+
+    @property
+    def eos(self) -> bool:
+        """Are we at the end of the stream?"""
+        return not self
+
+    def push(self, token: Token) -> None:
+        """Push a token back to the stream."""
+        self._pushed.append(token)
+
+    def look(self) -> Token:
+        """Look at the next token."""
+        old_token = next(self)
+        result = self.current
+        self.push(result)
+        self.current = old_token
+        return result
+
+    def skip(self, n: int = 1) -> None:
+        """Got n tokens ahead."""
+        for _ in range(n):
+            next(self)
+
+    def next_if(self, expr: str) -> t.Optional[Token]:
+        """Perform the token test and return the token if it matched.
+        Otherwise the return value is `None`.
+        """
+        if self.current.test(expr):
+            return next(self)
+
+        return None
+
+    def skip_if(self, expr: str) -> bool:
+        """Like :meth:`next_if` but only returns `True` or `False`."""
+        return self.next_if(expr) is not None
+
+    def __next__(self) -> Token:
+        """Go one token ahead and return the old one.
+
+        Use the built-in :func:`next` instead of calling this directly.
+        """
+        rv = self.current
+
+        if self._pushed:
+            self.current = self._pushed.popleft()
+        elif self.current.type is not TOKEN_EOF:
+            try:
+                self.current = next(self._iter)
+            except StopIteration:
+                self.close()
+
+        return rv
+
+    def close(self) -> None:
+        """Close the stream."""
+        self.current = Token(self.current.lineno, TOKEN_EOF, "")
+        self._iter = iter(())
+        self.closed = True
+
+    def expect(self, expr: str) -> Token:
+        """Expect a given token type and return it.  This accepts the same
+        argument as :meth:`jinja2.lexer.Token.test`.
+        """
+        if not self.current.test(expr):
+            expr = describe_token_expr(expr)
+
+            if self.current.type is TOKEN_EOF:
+                raise TemplateSyntaxError(
+                    f"unexpected end of template, expected {expr!r}.",
+                    self.current.lineno,
+                    self.name,
+                    self.filename,
+                )
+
+            raise TemplateSyntaxError(
+                f"expected token {expr!r}, got {describe_token(self.current)!r}",
+                self.current.lineno,
+                self.name,
+                self.filename,
+            )
+
+        return next(self)
+
+
+def get_lexer(environment: "Environment") -> "Lexer":
+    """Return a lexer which is probably cached."""
+    key = (
+        environment.block_start_string,
+        environment.block_end_string,
+        environment.variable_start_string,
+        environment.variable_end_string,
+        environment.comment_start_string,
+        environment.comment_end_string,
+        environment.line_statement_prefix,
+        environment.line_comment_prefix,
+        environment.trim_blocks,
+        environment.lstrip_blocks,
+        environment.newline_sequence,
+        environment.keep_trailing_newline,
+    )
+    lexer = _lexer_cache.get(key)
+
+    if lexer is None:
+        _lexer_cache[key] = lexer = Lexer(environment)
+
+    return lexer
+
+
+class OptionalLStrip(tuple):
+    """A special tuple for marking a point in the state that can have
+    lstrip applied.
+    """
+
+    __slots__ = ()
+
+    # Even though it looks like a no-op, creating instances fails
+    # without this.
+    def __new__(cls, *members, **kwargs):  # type: ignore
+        return super().__new__(cls, members)
+
+
+class _Rule(t.NamedTuple):
+    pattern: t.Pattern[str]
+    tokens: t.Union[str, t.Tuple[str, ...], t.Tuple[Failure]]
+    command: t.Optional[str]
+
+
+class Lexer:
+    """Class that implements a lexer for a given environment. Automatically
+    created by the environment class, usually you don't have to do that.
+
+    Note that the lexer is not automatically bound to an environment.
+    Multiple environments can share the same lexer.
+    """
+
+    def __init__(self, environment: "Environment") -> None:
+        # shortcuts
+        e = re.escape
+
+        def c(x: str) -> t.Pattern[str]:
+            return re.compile(x, re.M | re.S)
+
+        # lexing rules for tags
+        tag_rules: t.List[_Rule] = [
+            _Rule(whitespace_re, TOKEN_WHITESPACE, None),
+            _Rule(float_re, TOKEN_FLOAT, None),
+            _Rule(integer_re, TOKEN_INTEGER, None),
+            _Rule(name_re, TOKEN_NAME, None),
+            _Rule(string_re, TOKEN_STRING, None),
+            _Rule(operator_re, TOKEN_OPERATOR, None),
+        ]
+
+        # assemble the root lexing rule. because "|" is ungreedy
+        # we have to sort by length so that the lexer continues working
+        # as expected when we have parsing rules like <% for block and
+        # <%= for variables. (if someone wants asp like syntax)
+        # variables are just part of the rules if variable processing
+        # is required.
+        root_tag_rules = compile_rules(environment)
+
+        block_start_re = e(environment.block_start_string)
+        block_end_re = e(environment.block_end_string)
+        comment_end_re = e(environment.comment_end_string)
+        variable_end_re = e(environment.variable_end_string)
+
+        # block suffix if trimming is enabled
+        block_suffix_re = "\\n?" if environment.trim_blocks else ""
+
+        self.lstrip_blocks = environment.lstrip_blocks
+
+        self.newline_sequence = environment.newline_sequence
+        self.keep_trailing_newline = environment.keep_trailing_newline
+
+        root_raw_re = (
+            rf"(?P<raw_begin>{block_start_re}(\-|\+|)\s*raw\s*"
+            rf"(?:\-{block_end_re}\s*|{block_end_re}))"
+        )
+        root_parts_re = "|".join(
+            [root_raw_re] + [rf"(?P<{n}>{r}(\-|\+|))" for n, r in root_tag_rules]
+        )
+
+        # global lexing rules
+        self.rules: t.Dict[str, t.List[_Rule]] = {
+            "root": [
+                # directives
+                _Rule(
+                    c(rf"(.*?)(?:{root_parts_re})"),
+                    OptionalLStrip(TOKEN_DATA, "#bygroup"),  # type: ignore
+                    "#bygroup",
+                ),
+                # data
+                _Rule(c(".+"), TOKEN_DATA, None),
+            ],
+            # comments
+            TOKEN_COMMENT_BEGIN: [
+                _Rule(
+                    c(
+                        rf"(.*?)((?:\+{comment_end_re}|\-{comment_end_re}\s*"
+                        rf"|{comment_end_re}{block_suffix_re}))"
+                    ),
+                    (TOKEN_COMMENT, TOKEN_COMMENT_END),
+                    "#pop",
+                ),
+                _Rule(c(r"(.)"), (Failure("Missing end of comment tag"),), None),
+            ],
+            # blocks
+            TOKEN_BLOCK_BEGIN: [
+                _Rule(
+                    c(
+                        rf"(?:\+{block_end_re}|\-{block_end_re}\s*"
+                        rf"|{block_end_re}{block_suffix_re})"
+                    ),
+                    TOKEN_BLOCK_END,
+                    "#pop",
+                ),
+            ]
+            + tag_rules,
+            # variables
+            TOKEN_VARIABLE_BEGIN: [
+                _Rule(
+                    c(rf"\-{variable_end_re}\s*|{variable_end_re}"),
+                    TOKEN_VARIABLE_END,
+                    "#pop",
+                )
+            ]
+            + tag_rules,
+            # raw block
+            TOKEN_RAW_BEGIN: [
+                _Rule(
+                    c(
+                        rf"(.*?)((?:{block_start_re}(\-|\+|))\s*endraw\s*"
+                        rf"(?:\+{block_end_re}|\-{block_end_re}\s*"
+                        rf"|{block_end_re}{block_suffix_re}))"
+                    ),
+                    OptionalLStrip(TOKEN_DATA, TOKEN_RAW_END),  # type: ignore
+                    "#pop",
+                ),
+                _Rule(c(r"(.)"), (Failure("Missing end of raw directive"),), None),
+            ],
+            # line statements
+            TOKEN_LINESTATEMENT_BEGIN: [
+                _Rule(c(r"\s*(\n|$)"), TOKEN_LINESTATEMENT_END, "#pop")
+            ]
+            + tag_rules,
+            # line comments
+            TOKEN_LINECOMMENT_BEGIN: [
+                _Rule(
+                    c(r"(.*?)()(?=\n|$)"),
+                    (TOKEN_LINECOMMENT, TOKEN_LINECOMMENT_END),
+                    "#pop",
+                )
+            ],
+        }
+
+    def _normalize_newlines(self, value: str) -> str:
+        """Replace all newlines with the configured sequence in strings
+        and template data.
+        """
+        return newline_re.sub(self.newline_sequence, value)
+
+    def tokenize(
+        self,
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> TokenStream:
+        """Calls tokeniter + tokenize and wraps it in a token stream."""
+        stream = self.tokeniter(source, name, filename, state)
+        return TokenStream(self.wrap(stream, name, filename), name, filename)
+
+    def wrap(
+        self,
+        stream: t.Iterable[t.Tuple[int, str, str]],
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+    ) -> t.Iterator[Token]:
+        """This is called with the stream as returned by `tokenize` and wraps
+        every token in a :class:`Token` and converts the value.
+        """
+        for lineno, token, value_str in stream:
+            if token in ignored_tokens:
+                continue
+
+            value: t.Any = value_str
+
+            if token == TOKEN_LINESTATEMENT_BEGIN:
+                token = TOKEN_BLOCK_BEGIN
+            elif token == TOKEN_LINESTATEMENT_END:
+                token = TOKEN_BLOCK_END
+            # we are not interested in those tokens in the parser
+            elif token in (TOKEN_RAW_BEGIN, TOKEN_RAW_END):
+                continue
+            elif token == TOKEN_DATA:
+                value = self._normalize_newlines(value_str)
+            elif token == "keyword":
+                token = value_str
+            elif token == TOKEN_NAME:
+                value = value_str
+
+                if not value.isidentifier():
+                    raise TemplateSyntaxError(
+                        "Invalid character in identifier", lineno, name, filename
+                    )
+            elif token == TOKEN_STRING:
+                # try to unescape string
+                try:
+                    value = (
+                        self._normalize_newlines(value_str[1:-1])
+                        .encode("ascii", "backslashreplace")
+                        .decode("unicode-escape")
+                    )
+                except Exception as e:
+                    msg = str(e).split(":")[-1].strip()
+                    raise TemplateSyntaxError(msg, lineno, name, filename) from e
+            elif token == TOKEN_INTEGER:
+                value = int(value_str.replace("_", ""), 0)
+            elif token == TOKEN_FLOAT:
+                # remove all "_" first to support more Python versions
+                value = literal_eval(value_str.replace("_", ""))
+            elif token == TOKEN_OPERATOR:
+                token = operators[value_str]
+
+            yield Token(lineno, token, value)
+
+    def tokeniter(
+        self,
+        source: str,
+        name: t.Optional[str],
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> t.Iterator[t.Tuple[int, str, str]]:
+        """This method tokenizes the text and returns the tokens in a
+        generator. Use this method if you just want to tokenize a template.
+
+        .. versionchanged:: 3.0
+            Only ``\\n``, ``\\r\\n`` and ``\\r`` are treated as line
+            breaks.
+        """
+        lines = newline_re.split(source)[::2]
+
+        if not self.keep_trailing_newline and lines[-1] == "":
+            del lines[-1]
+
+        source = "\n".join(lines)
+        pos = 0
+        lineno = 1
+        stack = ["root"]
+
+        if state is not None and state != "root":
+            assert state in ("variable", "block"), "invalid state"
+            stack.append(state + "_begin")
+
+        statetokens = self.rules[stack[-1]]
+        source_length = len(source)
+        balancing_stack: t.List[str] = []
+        newlines_stripped = 0
+        line_starting = True
+
+        while True:
+            # tokenizer loop
+            for regex, tokens, new_state in statetokens:
+                m = regex.match(source, pos)
+
+                # if no match we try again with the next rule
+                if m is None:
+                    continue
+
+                # we only match blocks and variables if braces / parentheses
+                # are balanced. continue parsing with the lower rule which
+                # is the operator rule. do this only if the end tags look
+                # like operators
+                if balancing_stack and tokens in (
+                    TOKEN_VARIABLE_END,
+                    TOKEN_BLOCK_END,
+                    TOKEN_LINESTATEMENT_END,
+                ):
+                    continue
+
+                # tuples support more options
+                if isinstance(tokens, tuple):
+                    groups: t.Sequence[str] = m.groups()
+
+                    if isinstance(tokens, OptionalLStrip):
+                        # Rule supports lstrip. Match will look like
+                        # text, block type, whitespace control, type, control, ...
+                        text = groups[0]
+                        # Skipping the text and first type, every other group is the
+                        # whitespace control for each type. One of the groups will be
+                        # -, +, or empty string instead of None.
+                        strip_sign = next(g for g in groups[2::2] if g is not None)
+
+                        if strip_sign == "-":
+                            # Strip all whitespace between the text and the tag.
+                            stripped = text.rstrip()
+                            newlines_stripped = text[len(stripped) :].count("\n")
+                            groups = [stripped, *groups[1:]]
+                        elif (
+                            # Not marked for preserving whitespace.
+                            strip_sign != "+"
+                            # lstrip is enabled.
+                            and self.lstrip_blocks
+                            # Not a variable expression.
+                            and not m.groupdict().get(TOKEN_VARIABLE_BEGIN)
+                        ):
+                            # The start of text between the last newline and the tag.
+                            l_pos = text.rfind("\n") + 1
+
+                            if l_pos > 0 or line_starting:
+                                # If there's only whitespace between the newline and the
+                                # tag, strip it.
+                                if whitespace_re.fullmatch(text, l_pos):
+                                    groups = [text[:l_pos], *groups[1:]]
+
+                    for idx, token in enumerate(tokens):
+                        # failure group
+                        if token.__class__ is Failure:
+                            raise token(lineno, filename)
+                        # bygroup is a bit more complex, in that case we
+                        # yield for the current token the first named
+                        # group that matched
+                        elif token == "#bygroup":
+                            for key, value in m.groupdict().items():
+                                if value is not None:
+                                    yield lineno, key, value
+                                    lineno += value.count("\n")
+                                    break
+                            else:
+                                raise RuntimeError(
+                                    f"{regex!r} wanted to resolve the token dynamically"
+                                    " but no group matched"
+                                )
+                        # normal group
+                        else:
+                            data = groups[idx]
+
+                            if data or token not in ignore_if_empty:
+                                yield lineno, token, data
+
+                            lineno += data.count("\n") + newlines_stripped
+                            newlines_stripped = 0
+
+                # strings as token just are yielded as it.
+                else:
+                    data = m.group()
+
+                    # update brace/parentheses balance
+                    if tokens == TOKEN_OPERATOR:
+                        if data == "{":
+                            balancing_stack.append("}")
+                        elif data == "(":
+                            balancing_stack.append(")")
+                        elif data == "[":
+                            balancing_stack.append("]")
+                        elif data in ("}", ")", "]"):
+                            if not balancing_stack:
+                                raise TemplateSyntaxError(
+                                    f"unexpected '{data}'", lineno, name, filename
+                                )
+
+                            expected_op = balancing_stack.pop()
+
+                            if expected_op != data:
+                                raise TemplateSyntaxError(
+                                    f"unexpected '{data}', expected '{expected_op}'",
+                                    lineno,
+                                    name,
+                                    filename,
+                                )
+
+                    # yield items
+                    if data or tokens not in ignore_if_empty:
+                        yield lineno, tokens, data
+
+                    lineno += data.count("\n")
+
+                line_starting = m.group()[-1:] == "\n"
+                # fetch new position into new variable so that we can check
+                # if there is a internal parsing error which would result
+                # in an infinite loop
+                pos2 = m.end()
+
+                # handle state changes
+                if new_state is not None:
+                    # remove the uppermost state
+                    if new_state == "#pop":
+                        stack.pop()
+                    # resolve the new state by group checking
+                    elif new_state == "#bygroup":
+                        for key, value in m.groupdict().items():
+                            if value is not None:
+                                stack.append(key)
+                                break
+                        else:
+                            raise RuntimeError(
+                                f"{regex!r} wanted to resolve the new state dynamically"
+                                f" but no group matched"
+                            )
+                    # direct state name given
+                    else:
+                        stack.append(new_state)
+
+                    statetokens = self.rules[stack[-1]]
+                # we are still at the same position and no stack change.
+                # this means a loop without break condition, avoid that and
+                # raise error
+                elif pos2 == pos:
+                    raise RuntimeError(
+                        f"{regex!r} yielded empty string without stack change"
+                    )
+
+                # publish new function and start again
+                pos = pos2
+                break
+            # if loop terminated without break we haven't found a single match
+            # either we are at the end of the file or we have a problem
+            else:
+                # end of text
+                if pos >= source_length:
+                    return
+
+                # something went wrong
+                raise TemplateSyntaxError(
+                    f"unexpected char {source[pos]!r} at {pos}", lineno, name, filename
+                )
diff --git a/venv/lib/python3.9/site-packages/jinja2/loaders.py b/venv/lib/python3.9/site-packages/jinja2/loaders.py
new file mode 100644
index 0000000..d2f9809
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/loaders.py
@@ -0,0 +1,661 @@
+"""API and implementations for loading templates from different data
+sources.
+"""
+import importlib.util
+import os
+import posixpath
+import sys
+import typing as t
+import weakref
+import zipimport
+from collections import abc
+from hashlib import sha1
+from importlib import import_module
+from types import ModuleType
+
+from .exceptions import TemplateNotFound
+from .utils import internalcode
+from .utils import open_if_exists
+
+if t.TYPE_CHECKING:
+    from .environment import Environment
+    from .environment import Template
+
+
+def split_template_path(template: str) -> t.List[str]:
+    """Split a path into segments and perform a sanity check.  If it detects
+    '..' in the path it will raise a `TemplateNotFound` error.
+    """
+    pieces = []
+    for piece in template.split("/"):
+        if (
+            os.path.sep in piece
+            or (os.path.altsep and os.path.altsep in piece)
+            or piece == os.path.pardir
+        ):
+            raise TemplateNotFound(template)
+        elif piece and piece != ".":
+            pieces.append(piece)
+    return pieces
+
+
+class BaseLoader:
+    """Baseclass for all loaders.  Subclass this and override `get_source` to
+    implement a custom loading mechanism.  The environment provides a
+    `get_template` method that calls the loader's `load` method to get the
+    :class:`Template` object.
+
+    A very basic example for a loader that looks up templates on the file
+    system could look like this::
+
+        from jinja2 import BaseLoader, TemplateNotFound
+        from os.path import join, exists, getmtime
+
+        class MyLoader(BaseLoader):
+
+            def __init__(self, path):
+                self.path = path
+
+            def get_source(self, environment, template):
+                path = join(self.path, template)
+                if not exists(path):
+                    raise TemplateNotFound(template)
+                mtime = getmtime(path)
+                with open(path) as f:
+                    source = f.read()
+                return source, path, lambda: mtime == getmtime(path)
+    """
+
+    #: if set to `False` it indicates that the loader cannot provide access
+    #: to the source of templates.
+    #:
+    #: .. versionadded:: 2.4
+    has_source_access = True
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
+        """Get the template source, filename and reload helper for a template.
+        It's passed the environment and template name and has to return a
+        tuple in the form ``(source, filename, uptodate)`` or raise a
+        `TemplateNotFound` error if it can't locate the template.
+
+        The source part of the returned tuple must be the source of the
+        template as a string. The filename should be the name of the
+        file on the filesystem if it was loaded from there, otherwise
+        ``None``. The filename is used by Python for the tracebacks
+        if no loader extension is used.
+
+        The last item in the tuple is the `uptodate` function.  If auto
+        reloading is enabled it's always called to check if the template
+        changed.  No arguments are passed so the function must store the
+        old state somewhere (for example in a closure).  If it returns `False`
+        the template will be reloaded.
+        """
+        if not self.has_source_access:
+            raise RuntimeError(
+                f"{type(self).__name__} cannot provide access to the source"
+            )
+        raise TemplateNotFound(template)
+
+    def list_templates(self) -> t.List[str]:
+        """Iterates over all templates.  If the loader does not support that
+        it should raise a :exc:`TypeError` which is the default behavior.
+        """
+        raise TypeError("this loader cannot iterate over all templates")
+
+    @internalcode
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        """Loads a template.  This method looks up the template in the cache
+        or loads one by calling :meth:`get_source`.  Subclasses should not
+        override this method as loaders working on collections of other
+        loaders (such as :class:`PrefixLoader` or :class:`ChoiceLoader`)
+        will not call this method but `get_source` directly.
+        """
+        code = None
+        if globals is None:
+            globals = {}
+
+        # first we try to get the source for this template together
+        # with the filename and the uptodate function.
+        source, filename, uptodate = self.get_source(environment, name)
+
+        # try to load the code from the bytecode cache if there is a
+        # bytecode cache configured.
+        bcc = environment.bytecode_cache
+        if bcc is not None:
+            bucket = bcc.get_bucket(environment, name, filename, source)
+            code = bucket.code
+
+        # if we don't have code so far (not cached, no longer up to
+        # date) etc. we compile the template
+        if code is None:
+            code = environment.compile(source, name, filename)
+
+        # if the bytecode cache is available and the bucket doesn't
+        # have a code so far, we give the bucket the new code and put
+        # it back to the bytecode cache.
+        if bcc is not None and bucket.code is None:
+            bucket.code = code
+            bcc.set_bucket(bucket)
+
+        return environment.template_class.from_code(
+            environment, code, globals, uptodate
+        )
+
+
+class FileSystemLoader(BaseLoader):
+    """Load templates from a directory in the file system.
+
+    The path can be relative or absolute. Relative paths are relative to
+    the current working directory.
+
+    .. code-block:: python
+
+        loader = FileSystemLoader("templates")
+
+    A list of paths can be given. The directories will be searched in
+    order, stopping at the first matching template.
+
+    .. code-block:: python
+
+        loader = FileSystemLoader(["/override/templates", "/default/templates"])
+
+    :param searchpath: A path, or list of paths, to the directory that
+        contains the templates.
+    :param encoding: Use this encoding to read the text from template
+        files.
+    :param followlinks: Follow symbolic links in the path.
+
+    .. versionchanged:: 2.8
+        Added the ``followlinks`` parameter.
+    """
+
+    def __init__(
+        self,
+        searchpath: t.Union[str, os.PathLike, t.Sequence[t.Union[str, os.PathLike]]],
+        encoding: str = "utf-8",
+        followlinks: bool = False,
+    ) -> None:
+        if not isinstance(searchpath, abc.Iterable) or isinstance(searchpath, str):
+            searchpath = [searchpath]
+
+        self.searchpath = [os.fspath(p) for p in searchpath]
+        self.encoding = encoding
+        self.followlinks = followlinks
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, str, t.Callable[[], bool]]:
+        pieces = split_template_path(template)
+        for searchpath in self.searchpath:
+            # Use posixpath even on Windows to avoid "drive:" or UNC
+            # segments breaking out of the search directory.
+            filename = posixpath.join(searchpath, *pieces)
+            f = open_if_exists(filename)
+            if f is None:
+                continue
+            try:
+                contents = f.read().decode(self.encoding)
+            finally:
+                f.close()
+
+            mtime = os.path.getmtime(filename)
+
+            def uptodate() -> bool:
+                try:
+                    return os.path.getmtime(filename) == mtime
+                except OSError:
+                    return False
+
+            # Use normpath to convert Windows altsep to sep.
+            return contents, os.path.normpath(filename), uptodate
+        raise TemplateNotFound(template)
+
+    def list_templates(self) -> t.List[str]:
+        found = set()
+        for searchpath in self.searchpath:
+            walk_dir = os.walk(searchpath, followlinks=self.followlinks)
+            for dirpath, _, filenames in walk_dir:
+                for filename in filenames:
+                    template = (
+                        os.path.join(dirpath, filename)[len(searchpath) :]
+                        .strip(os.path.sep)
+                        .replace(os.path.sep, "/")
+                    )
+                    if template[:2] == "./":
+                        template = template[2:]
+                    if template not in found:
+                        found.add(template)
+        return sorted(found)
+
+
+class PackageLoader(BaseLoader):
+    """Load templates from a directory in a Python package.
+
+    :param package_name: Import name of the package that contains the
+        template directory.
+    :param package_path: Directory within the imported package that
+        contains the templates.
+    :param encoding: Encoding of template files.
+
+    The following example looks up templates in the ``pages`` directory
+    within the ``project.ui`` package.
+
+    .. code-block:: python
+
+        loader = PackageLoader("project.ui", "pages")
+
+    Only packages installed as directories (standard pip behavior) or
+    zip/egg files (less common) are supported. The Python API for
+    introspecting data in packages is too limited to support other
+    installation methods the way this loader requires.
+
+    There is limited support for :pep:`420` namespace packages. The
+    template directory is assumed to only be in one namespace
+    contributor. Zip files contributing to a namespace are not
+    supported.
+
+    .. versionchanged:: 3.0
+        No longer uses ``setuptools`` as a dependency.
+
+    .. versionchanged:: 3.0
+        Limited PEP 420 namespace package support.
+    """
+
+    def __init__(
+        self,
+        package_name: str,
+        package_path: "str" = "templates",
+        encoding: str = "utf-8",
+    ) -> None:
+        package_path = os.path.normpath(package_path).rstrip(os.path.sep)
+
+        # normpath preserves ".", which isn't valid in zip paths.
+        if package_path == os.path.curdir:
+            package_path = ""
+        elif package_path[:2] == os.path.curdir + os.path.sep:
+            package_path = package_path[2:]
+
+        self.package_path = package_path
+        self.package_name = package_name
+        self.encoding = encoding
+
+        # Make sure the package exists. This also makes namespace
+        # packages work, otherwise get_loader returns None.
+        import_module(package_name)
+        spec = importlib.util.find_spec(package_name)
+        assert spec is not None, "An import spec was not found for the package."
+        loader = spec.loader
+        assert loader is not None, "A loader was not found for the package."
+        self._loader = loader
+        self._archive = None
+        template_root = None
+
+        if isinstance(loader, zipimport.zipimporter):
+            self._archive = loader.archive
+            pkgdir = next(iter(spec.submodule_search_locations))  # type: ignore
+            template_root = os.path.join(pkgdir, package_path).rstrip(os.path.sep)
+        else:
+            roots: t.List[str] = []
+
+            # One element for regular packages, multiple for namespace
+            # packages, or None for single module file.
+            if spec.submodule_search_locations:
+                roots.extend(spec.submodule_search_locations)
+            # A single module file, use the parent directory instead.
+            elif spec.origin is not None:
+                roots.append(os.path.dirname(spec.origin))
+
+            for root in roots:
+                root = os.path.join(root, package_path)
+
+                if os.path.isdir(root):
+                    template_root = root
+                    break
+
+        if template_root is None:
+            raise ValueError(
+                f"The {package_name!r} package was not installed in a"
+                " way that PackageLoader understands."
+            )
+
+        self._template_root = template_root
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, str, t.Optional[t.Callable[[], bool]]]:
+        # Use posixpath even on Windows to avoid "drive:" or UNC
+        # segments breaking out of the search directory. Use normpath to
+        # convert Windows altsep to sep.
+        p = os.path.normpath(
+            posixpath.join(self._template_root, *split_template_path(template))
+        )
+        up_to_date: t.Optional[t.Callable[[], bool]]
+
+        if self._archive is None:
+            # Package is a directory.
+            if not os.path.isfile(p):
+                raise TemplateNotFound(template)
+
+            with open(p, "rb") as f:
+                source = f.read()
+
+            mtime = os.path.getmtime(p)
+
+            def up_to_date() -> bool:
+                return os.path.isfile(p) and os.path.getmtime(p) == mtime
+
+        else:
+            # Package is a zip file.
+            try:
+                source = self._loader.get_data(p)  # type: ignore
+            except OSError as e:
+                raise TemplateNotFound(template) from e
+
+            # Could use the zip's mtime for all template mtimes, but
+            # would need to safely reload the module if it's out of
+            # date, so just report it as always current.
+            up_to_date = None
+
+        return source.decode(self.encoding), p, up_to_date
+
+    def list_templates(self) -> t.List[str]:
+        results: t.List[str] = []
+
+        if self._archive is None:
+            # Package is a directory.
+            offset = len(self._template_root)
+
+            for dirpath, _, filenames in os.walk(self._template_root):
+                dirpath = dirpath[offset:].lstrip(os.path.sep)
+                results.extend(
+                    os.path.join(dirpath, name).replace(os.path.sep, "/")
+                    for name in filenames
+                )
+        else:
+            if not hasattr(self._loader, "_files"):
+                raise TypeError(
+                    "This zip import does not have the required"
+                    " metadata to list templates."
+                )
+
+            # Package is a zip file.
+            prefix = (
+                self._template_root[len(self._archive) :].lstrip(os.path.sep)
+                + os.path.sep
+            )
+            offset = len(prefix)
+
+            for name in self._loader._files.keys():  # type: ignore
+                # Find names under the templates directory that aren't directories.
+                if name.startswith(prefix) and name[-1] != os.path.sep:
+                    results.append(name[offset:].replace(os.path.sep, "/"))
+
+        results.sort()
+        return results
+
+
+class DictLoader(BaseLoader):
+    """Loads a template from a Python dict mapping template names to
+    template source.  This loader is useful for unittesting:
+
+    >>> loader = DictLoader({'index.html': 'source here'})
+
+    Because auto reloading is rarely useful this is disabled per default.
+    """
+
+    def __init__(self, mapping: t.Mapping[str, str]) -> None:
+        self.mapping = mapping
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, None, t.Callable[[], bool]]:
+        if template in self.mapping:
+            source = self.mapping[template]
+            return source, None, lambda: source == self.mapping.get(template)
+        raise TemplateNotFound(template)
+
+    def list_templates(self) -> t.List[str]:
+        return sorted(self.mapping)
+
+
+class FunctionLoader(BaseLoader):
+    """A loader that is passed a function which does the loading.  The
+    function receives the name of the template and has to return either
+    a string with the template source, a tuple in the form ``(source,
+    filename, uptodatefunc)`` or `None` if the template does not exist.
+
+    >>> def load_template(name):
+    ...     if name == 'index.html':
+    ...         return '...'
+    ...
+    >>> loader = FunctionLoader(load_template)
+
+    The `uptodatefunc` is a function that is called if autoreload is enabled
+    and has to return `True` if the template is still up to date.  For more
+    details have a look at :meth:`BaseLoader.get_source` which has the same
+    return value.
+    """
+
+    def __init__(
+        self,
+        load_func: t.Callable[
+            [str],
+            t.Optional[
+                t.Union[
+                    str, t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]
+                ]
+            ],
+        ],
+    ) -> None:
+        self.load_func = load_func
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
+        rv = self.load_func(template)
+
+        if rv is None:
+            raise TemplateNotFound(template)
+
+        if isinstance(rv, str):
+            return rv, None, None
+
+        return rv
+
+
+class PrefixLoader(BaseLoader):
+    """A loader that is passed a dict of loaders where each loader is bound
+    to a prefix.  The prefix is delimited from the template by a slash per
+    default, which can be changed by setting the `delimiter` argument to
+    something else::
+
+        loader = PrefixLoader({
+            'app1':     PackageLoader('mypackage.app1'),
+            'app2':     PackageLoader('mypackage.app2')
+        })
+
+    By loading ``'app1/index.html'`` the file from the app1 package is loaded,
+    by loading ``'app2/index.html'`` the file from the second.
+    """
+
+    def __init__(
+        self, mapping: t.Mapping[str, BaseLoader], delimiter: str = "/"
+    ) -> None:
+        self.mapping = mapping
+        self.delimiter = delimiter
+
+    def get_loader(self, template: str) -> t.Tuple[BaseLoader, str]:
+        try:
+            prefix, name = template.split(self.delimiter, 1)
+            loader = self.mapping[prefix]
+        except (ValueError, KeyError) as e:
+            raise TemplateNotFound(template) from e
+        return loader, name
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
+        loader, name = self.get_loader(template)
+        try:
+            return loader.get_source(environment, name)
+        except TemplateNotFound as e:
+            # re-raise the exception with the correct filename here.
+            # (the one that includes the prefix)
+            raise TemplateNotFound(template) from e
+
+    @internalcode
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        loader, local_name = self.get_loader(name)
+        try:
+            return loader.load(environment, local_name, globals)
+        except TemplateNotFound as e:
+            # re-raise the exception with the correct filename here.
+            # (the one that includes the prefix)
+            raise TemplateNotFound(name) from e
+
+    def list_templates(self) -> t.List[str]:
+        result = []
+        for prefix, loader in self.mapping.items():
+            for template in loader.list_templates():
+                result.append(prefix + self.delimiter + template)
+        return result
+
+
+class ChoiceLoader(BaseLoader):
+    """This loader works like the `PrefixLoader` just that no prefix is
+    specified.  If a template could not be found by one loader the next one
+    is tried.
+
+    >>> loader = ChoiceLoader([
+    ...     FileSystemLoader('/path/to/user/templates'),
+    ...     FileSystemLoader('/path/to/system/templates')
+    ... ])
+
+    This is useful if you want to allow users to override builtin templates
+    from a different location.
+    """
+
+    def __init__(self, loaders: t.Sequence[BaseLoader]) -> None:
+        self.loaders = loaders
+
+    def get_source(
+        self, environment: "Environment", template: str
+    ) -> t.Tuple[str, t.Optional[str], t.Optional[t.Callable[[], bool]]]:
+        for loader in self.loaders:
+            try:
+                return loader.get_source(environment, template)
+            except TemplateNotFound:
+                pass
+        raise TemplateNotFound(template)
+
+    @internalcode
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        for loader in self.loaders:
+            try:
+                return loader.load(environment, name, globals)
+            except TemplateNotFound:
+                pass
+        raise TemplateNotFound(name)
+
+    def list_templates(self) -> t.List[str]:
+        found = set()
+        for loader in self.loaders:
+            found.update(loader.list_templates())
+        return sorted(found)
+
+
+class _TemplateModule(ModuleType):
+    """Like a normal module but with support for weak references"""
+
+
+class ModuleLoader(BaseLoader):
+    """This loader loads templates from precompiled templates.
+
+    Example usage:
+
+    >>> loader = ChoiceLoader([
+    ...     ModuleLoader('/path/to/compiled/templates'),
+    ...     FileSystemLoader('/path/to/templates')
+    ... ])
+
+    Templates can be precompiled with :meth:`Environment.compile_templates`.
+    """
+
+    has_source_access = False
+
+    def __init__(
+        self, path: t.Union[str, os.PathLike, t.Sequence[t.Union[str, os.PathLike]]]
+    ) -> None:
+        package_name = f"_jinja2_module_templates_{id(self):x}"
+
+        # create a fake module that looks for the templates in the
+        # path given.
+        mod = _TemplateModule(package_name)
+
+        if not isinstance(path, abc.Iterable) or isinstance(path, str):
+            path = [path]
+
+        mod.__path__ = [os.fspath(p) for p in path]
+
+        sys.modules[package_name] = weakref.proxy(
+            mod, lambda x: sys.modules.pop(package_name, None)
+        )
+
+        # the only strong reference, the sys.modules entry is weak
+        # so that the garbage collector can remove it once the
+        # loader that created it goes out of business.
+        self.module = mod
+        self.package_name = package_name
+
+    @staticmethod
+    def get_template_key(name: str) -> str:
+        return "tmpl_" + sha1(name.encode("utf-8")).hexdigest()
+
+    @staticmethod
+    def get_module_filename(name: str) -> str:
+        return ModuleLoader.get_template_key(name) + ".py"
+
+    @internalcode
+    def load(
+        self,
+        environment: "Environment",
+        name: str,
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ) -> "Template":
+        key = self.get_template_key(name)
+        module = f"{self.package_name}.{key}"
+        mod = getattr(self.module, module, None)
+
+        if mod is None:
+            try:
+                mod = __import__(module, None, None, ["root"])
+            except ImportError as e:
+                raise TemplateNotFound(name) from e
+
+            # remove the entry from sys.modules, we only want the attribute
+            # on the module object we have stored on the loader.
+            sys.modules.pop(module, None)
+
+        if globals is None:
+            globals = {}
+
+        return environment.template_class.from_module_dict(
+            environment, mod.__dict__, globals
+        )
diff --git a/venv/lib/python3.9/site-packages/jinja2/meta.py b/venv/lib/python3.9/site-packages/jinja2/meta.py
new file mode 100644
index 0000000..0057d6e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/meta.py
@@ -0,0 +1,111 @@
+"""Functions that expose information about templates that might be
+interesting for introspection.
+"""
+import typing as t
+
+from . import nodes
+from .compiler import CodeGenerator
+from .compiler import Frame
+
+if t.TYPE_CHECKING:
+    from .environment import Environment
+
+
+class TrackingCodeGenerator(CodeGenerator):
+    """We abuse the code generator for introspection."""
+
+    def __init__(self, environment: "Environment") -> None:
+        super().__init__(environment, "<introspection>", "<introspection>")
+        self.undeclared_identifiers: t.Set[str] = set()
+
+    def write(self, x: str) -> None:
+        """Don't write."""
+
+    def enter_frame(self, frame: Frame) -> None:
+        """Remember all undeclared identifiers."""
+        super().enter_frame(frame)
+
+        for _, (action, param) in frame.symbols.loads.items():
+            if action == "resolve" and param not in self.environment.globals:
+                self.undeclared_identifiers.add(param)
+
+
+def find_undeclared_variables(ast: nodes.Template) -> t.Set[str]:
+    """Returns a set of all variables in the AST that will be looked up from
+    the context at runtime.  Because at compile time it's not known which
+    variables will be used depending on the path the execution takes at
+    runtime, all variables are returned.
+
+    >>> from jinja2 import Environment, meta
+    >>> env = Environment()
+    >>> ast = env.parse('{% set foo = 42 %}{{ bar + foo }}')
+    >>> meta.find_undeclared_variables(ast) == {'bar'}
+    True
+
+    .. admonition:: Implementation
+
+       Internally the code generator is used for finding undeclared variables.
+       This is good to know because the code generator might raise a
+       :exc:`TemplateAssertionError` during compilation and as a matter of
+       fact this function can currently raise that exception as well.
+    """
+    codegen = TrackingCodeGenerator(ast.environment)  # type: ignore
+    codegen.visit(ast)
+    return codegen.undeclared_identifiers
+
+
+_ref_types = (nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include)
+_RefType = t.Union[nodes.Extends, nodes.FromImport, nodes.Import, nodes.Include]
+
+
+def find_referenced_templates(ast: nodes.Template) -> t.Iterator[t.Optional[str]]:
+    """Finds all the referenced templates from the AST.  This will return an
+    iterator over all the hardcoded template extensions, inclusions and
+    imports.  If dynamic inheritance or inclusion is used, `None` will be
+    yielded.
+
+    >>> from jinja2 import Environment, meta
+    >>> env = Environment()
+    >>> ast = env.parse('{% extends "layout.html" %}{% include helper %}')
+    >>> list(meta.find_referenced_templates(ast))
+    ['layout.html', None]
+
+    This function is useful for dependency tracking.  For example if you want
+    to rebuild parts of the website after a layout template has changed.
+    """
+    template_name: t.Any
+
+    for node in ast.find_all(_ref_types):
+        template: nodes.Expr = node.template  # type: ignore
+
+        if not isinstance(template, nodes.Const):
+            # a tuple with some non consts in there
+            if isinstance(template, (nodes.Tuple, nodes.List)):
+                for template_name in template.items:
+                    # something const, only yield the strings and ignore
+                    # non-string consts that really just make no sense
+                    if isinstance(template_name, nodes.Const):
+                        if isinstance(template_name.value, str):
+                            yield template_name.value
+                    # something dynamic in there
+                    else:
+                        yield None
+            # something dynamic we don't know about here
+            else:
+                yield None
+            continue
+        # constant is a basestring, direct template name
+        if isinstance(template.value, str):
+            yield template.value
+        # a tuple or list (latter *should* not happen) made of consts,
+        # yield the consts that are strings.  We could warn here for
+        # non string values
+        elif isinstance(node, nodes.Include) and isinstance(
+            template.value, (tuple, list)
+        ):
+            for template_name in template.value:
+                if isinstance(template_name, str):
+                    yield template_name
+        # something else we don't care about, we could warn here
+        else:
+            yield None
diff --git a/venv/lib/python3.9/site-packages/jinja2/nativetypes.py b/venv/lib/python3.9/site-packages/jinja2/nativetypes.py
new file mode 100644
index 0000000..ac08610
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/nativetypes.py
@@ -0,0 +1,130 @@
+import typing as t
+from ast import literal_eval
+from ast import parse
+from itertools import chain
+from itertools import islice
+from types import GeneratorType
+
+from . import nodes
+from .compiler import CodeGenerator
+from .compiler import Frame
+from .compiler import has_safe_repr
+from .environment import Environment
+from .environment import Template
+
+
+def native_concat(values: t.Iterable[t.Any]) -> t.Optional[t.Any]:
+    """Return a native Python type from the list of compiled nodes. If
+    the result is a single node, its value is returned. Otherwise, the
+    nodes are concatenated as strings. If the result can be parsed with
+    :func:`ast.literal_eval`, the parsed value is returned. Otherwise,
+    the string is returned.
+
+    :param values: Iterable of outputs to concatenate.
+    """
+    head = list(islice(values, 2))
+
+    if not head:
+        return None
+
+    if len(head) == 1:
+        raw = head[0]
+        if not isinstance(raw, str):
+            return raw
+    else:
+        if isinstance(values, GeneratorType):
+            values = chain(head, values)
+        raw = "".join([str(v) for v in values])
+
+    try:
+        return literal_eval(
+            # In Python 3.10+ ast.literal_eval removes leading spaces/tabs
+            # from the given string. For backwards compatibility we need to
+            # parse the string ourselves without removing leading spaces/tabs.
+            parse(raw, mode="eval")
+        )
+    except (ValueError, SyntaxError, MemoryError):
+        return raw
+
+
+class NativeCodeGenerator(CodeGenerator):
+    """A code generator which renders Python types by not adding
+    ``str()`` around output nodes.
+    """
+
+    @staticmethod
+    def _default_finalize(value: t.Any) -> t.Any:
+        return value
+
+    def _output_const_repr(self, group: t.Iterable[t.Any]) -> str:
+        return repr("".join([str(v) for v in group]))
+
+    def _output_child_to_const(
+        self, node: nodes.Expr, frame: Frame, finalize: CodeGenerator._FinalizeInfo
+    ) -> t.Any:
+        const = node.as_const(frame.eval_ctx)
+
+        if not has_safe_repr(const):
+            raise nodes.Impossible()
+
+        if isinstance(node, nodes.TemplateData):
+            return const
+
+        return finalize.const(const)  # type: ignore
+
+    def _output_child_pre(
+        self, node: nodes.Expr, frame: Frame, finalize: CodeGenerator._FinalizeInfo
+    ) -> None:
+        if finalize.src is not None:
+            self.write(finalize.src)
+
+    def _output_child_post(
+        self, node: nodes.Expr, frame: Frame, finalize: CodeGenerator._FinalizeInfo
+    ) -> None:
+        if finalize.src is not None:
+            self.write(")")
+
+
+class NativeEnvironment(Environment):
+    """An environment that renders templates to native Python types."""
+
+    code_generator_class = NativeCodeGenerator
+    concat = staticmethod(native_concat)  # type: ignore
+
+
+class NativeTemplate(Template):
+    environment_class = NativeEnvironment
+
+    def render(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        """Render the template to produce a native Python type. If the
+        result is a single node, its value is returned. Otherwise, the
+        nodes are concatenated as strings. If the result can be parsed
+        with :func:`ast.literal_eval`, the parsed value is returned.
+        Otherwise, the string is returned.
+        """
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            return self.environment_class.concat(  # type: ignore
+                self.root_render_func(ctx)  # type: ignore
+            )
+        except Exception:
+            return self.environment.handle_exception()
+
+    async def render_async(self, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        if not self.environment.is_async:
+            raise RuntimeError(
+                "The environment was not created with async mode enabled."
+            )
+
+        ctx = self.new_context(dict(*args, **kwargs))
+
+        try:
+            return self.environment_class.concat(  # type: ignore
+                [n async for n in self.root_render_func(ctx)]  # type: ignore
+            )
+        except Exception:
+            return self.environment.handle_exception()
+
+
+NativeEnvironment.template_class = NativeTemplate
diff --git a/venv/lib/python3.9/site-packages/jinja2/nodes.py b/venv/lib/python3.9/site-packages/jinja2/nodes.py
new file mode 100644
index 0000000..b2f88d9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/nodes.py
@@ -0,0 +1,1204 @@
+"""AST nodes generated by the parser for the compiler. Also provides
+some node tree helper functions used by the parser and compiler in order
+to normalize nodes.
+"""
+import inspect
+import operator
+import typing as t
+from collections import deque
+
+from markupsafe import Markup
+
+from .utils import _PassArg
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
+_NodeBound = t.TypeVar("_NodeBound", bound="Node")
+
+_binop_to_func: t.Dict[str, t.Callable[[t.Any, t.Any], t.Any]] = {
+    "*": operator.mul,
+    "/": operator.truediv,
+    "//": operator.floordiv,
+    "**": operator.pow,
+    "%": operator.mod,
+    "+": operator.add,
+    "-": operator.sub,
+}
+
+_uaop_to_func: t.Dict[str, t.Callable[[t.Any], t.Any]] = {
+    "not": operator.not_,
+    "+": operator.pos,
+    "-": operator.neg,
+}
+
+_cmpop_to_func: t.Dict[str, t.Callable[[t.Any, t.Any], t.Any]] = {
+    "eq": operator.eq,
+    "ne": operator.ne,
+    "gt": operator.gt,
+    "gteq": operator.ge,
+    "lt": operator.lt,
+    "lteq": operator.le,
+    "in": lambda a, b: a in b,
+    "notin": lambda a, b: a not in b,
+}
+
+
+class Impossible(Exception):
+    """Raised if the node could not perform a requested action."""
+
+
+class NodeType(type):
+    """A metaclass for nodes that handles the field and attribute
+    inheritance.  fields and attributes from the parent class are
+    automatically forwarded to the child."""
+
+    def __new__(mcs, name, bases, d):  # type: ignore
+        for attr in "fields", "attributes":
+            storage = []
+            storage.extend(getattr(bases[0] if bases else object, attr, ()))
+            storage.extend(d.get(attr, ()))
+            assert len(bases) <= 1, "multiple inheritance not allowed"
+            assert len(storage) == len(set(storage)), "layout conflict"
+            d[attr] = tuple(storage)
+        d.setdefault("abstract", False)
+        return type.__new__(mcs, name, bases, d)
+
+
+class EvalContext:
+    """Holds evaluation time information.  Custom attributes can be attached
+    to it in extensions.
+    """
+
+    def __init__(
+        self, environment: "Environment", template_name: t.Optional[str] = None
+    ) -> None:
+        self.environment = environment
+        if callable(environment.autoescape):
+            self.autoescape = environment.autoescape(template_name)
+        else:
+            self.autoescape = environment.autoescape
+        self.volatile = False
+
+    def save(self) -> t.Mapping[str, t.Any]:
+        return self.__dict__.copy()
+
+    def revert(self, old: t.Mapping[str, t.Any]) -> None:
+        self.__dict__.clear()
+        self.__dict__.update(old)
+
+
+def get_eval_context(node: "Node", ctx: t.Optional[EvalContext]) -> EvalContext:
+    if ctx is None:
+        if node.environment is None:
+            raise RuntimeError(
+                "if no eval context is passed, the node must have an"
+                " attached environment."
+            )
+        return EvalContext(node.environment)
+    return ctx
+
+
+class Node(metaclass=NodeType):
+    """Baseclass for all Jinja nodes.  There are a number of nodes available
+    of different types.  There are four major types:
+
+    -   :class:`Stmt`: statements
+    -   :class:`Expr`: expressions
+    -   :class:`Helper`: helper nodes
+    -   :class:`Template`: the outermost wrapper node
+
+    All nodes have fields and attributes.  Fields may be other nodes, lists,
+    or arbitrary values.  Fields are passed to the constructor as regular
+    positional arguments, attributes as keyword arguments.  Each node has
+    two attributes: `lineno` (the line number of the node) and `environment`.
+    The `environment` attribute is set at the end of the parsing process for
+    all nodes automatically.
+    """
+
+    fields: t.Tuple[str, ...] = ()
+    attributes: t.Tuple[str, ...] = ("lineno", "environment")
+    abstract = True
+
+    lineno: int
+    environment: t.Optional["Environment"]
+
+    def __init__(self, *fields: t.Any, **attributes: t.Any) -> None:
+        if self.abstract:
+            raise TypeError("abstract nodes are not instantiable")
+        if fields:
+            if len(fields) != len(self.fields):
+                if not self.fields:
+                    raise TypeError(f"{type(self).__name__!r} takes 0 arguments")
+                raise TypeError(
+                    f"{type(self).__name__!r} takes 0 or {len(self.fields)}"
+                    f" argument{'s' if len(self.fields) != 1 else ''}"
+                )
+            for name, arg in zip(self.fields, fields):
+                setattr(self, name, arg)
+        for attr in self.attributes:
+            setattr(self, attr, attributes.pop(attr, None))
+        if attributes:
+            raise TypeError(f"unknown attribute {next(iter(attributes))!r}")
+
+    def iter_fields(
+        self,
+        exclude: t.Optional[t.Container[str]] = None,
+        only: t.Optional[t.Container[str]] = None,
+    ) -> t.Iterator[t.Tuple[str, t.Any]]:
+        """This method iterates over all fields that are defined and yields
+        ``(key, value)`` tuples.  Per default all fields are returned, but
+        it's possible to limit that to some fields by providing the `only`
+        parameter or to exclude some using the `exclude` parameter.  Both
+        should be sets or tuples of field names.
+        """
+        for name in self.fields:
+            if (
+                (exclude is None and only is None)
+                or (exclude is not None and name not in exclude)
+                or (only is not None and name in only)
+            ):
+                try:
+                    yield name, getattr(self, name)
+                except AttributeError:
+                    pass
+
+    def iter_child_nodes(
+        self,
+        exclude: t.Optional[t.Container[str]] = None,
+        only: t.Optional[t.Container[str]] = None,
+    ) -> t.Iterator["Node"]:
+        """Iterates over all direct child nodes of the node.  This iterates
+        over all fields and yields the values of they are nodes.  If the value
+        of a field is a list all the nodes in that list are returned.
+        """
+        for _, item in self.iter_fields(exclude, only):
+            if isinstance(item, list):
+                for n in item:
+                    if isinstance(n, Node):
+                        yield n
+            elif isinstance(item, Node):
+                yield item
+
+    def find(self, node_type: t.Type[_NodeBound]) -> t.Optional[_NodeBound]:
+        """Find the first node of a given type.  If no such node exists the
+        return value is `None`.
+        """
+        for result in self.find_all(node_type):
+            return result
+
+        return None
+
+    def find_all(
+        self, node_type: t.Union[t.Type[_NodeBound], t.Tuple[t.Type[_NodeBound], ...]]
+    ) -> t.Iterator[_NodeBound]:
+        """Find all the nodes of a given type.  If the type is a tuple,
+        the check is performed for any of the tuple items.
+        """
+        for child in self.iter_child_nodes():
+            if isinstance(child, node_type):
+                yield child  # type: ignore
+            yield from child.find_all(node_type)
+
+    def set_ctx(self, ctx: str) -> "Node":
+        """Reset the context of a node and all child nodes.  Per default the
+        parser will all generate nodes that have a 'load' context as it's the
+        most common one.  This method is used in the parser to set assignment
+        targets and other nodes to a store context.
+        """
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            if "ctx" in node.fields:
+                node.ctx = ctx  # type: ignore
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def set_lineno(self, lineno: int, override: bool = False) -> "Node":
+        """Set the line numbers of the node and children."""
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            if "lineno" in node.attributes:
+                if node.lineno is None or override:
+                    node.lineno = lineno
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def set_environment(self, environment: "Environment") -> "Node":
+        """Set the environment for all nodes."""
+        todo = deque([self])
+        while todo:
+            node = todo.popleft()
+            node.environment = environment
+            todo.extend(node.iter_child_nodes())
+        return self
+
+    def __eq__(self, other: t.Any) -> bool:
+        if type(self) is not type(other):
+            return NotImplemented
+
+        return tuple(self.iter_fields()) == tuple(other.iter_fields())
+
+    __hash__ = object.__hash__
+
+    def __repr__(self) -> str:
+        args_str = ", ".join(f"{a}={getattr(self, a, None)!r}" for a in self.fields)
+        return f"{type(self).__name__}({args_str})"
+
+    def dump(self) -> str:
+        def _dump(node: t.Union[Node, t.Any]) -> None:
+            if not isinstance(node, Node):
+                buf.append(repr(node))
+                return
+
+            buf.append(f"nodes.{type(node).__name__}(")
+            if not node.fields:
+                buf.append(")")
+                return
+            for idx, field in enumerate(node.fields):
+                if idx:
+                    buf.append(", ")
+                value = getattr(node, field)
+                if isinstance(value, list):
+                    buf.append("[")
+                    for idx, item in enumerate(value):
+                        if idx:
+                            buf.append(", ")
+                        _dump(item)
+                    buf.append("]")
+                else:
+                    _dump(value)
+            buf.append(")")
+
+        buf: t.List[str] = []
+        _dump(self)
+        return "".join(buf)
+
+
+class Stmt(Node):
+    """Base node for all statements."""
+
+    abstract = True
+
+
+class Helper(Node):
+    """Nodes that exist in a specific context only."""
+
+    abstract = True
+
+
+class Template(Node):
+    """Node that represents a template.  This must be the outermost node that
+    is passed to the compiler.
+    """
+
+    fields = ("body",)
+    body: t.List[Node]
+
+
+class Output(Stmt):
+    """A node that holds multiple expressions which are then printed out.
+    This is used both for the `print` statement and the regular template data.
+    """
+
+    fields = ("nodes",)
+    nodes: t.List["Expr"]
+
+
+class Extends(Stmt):
+    """Represents an extends statement."""
+
+    fields = ("template",)
+    template: "Expr"
+
+
+class For(Stmt):
+    """The for loop.  `target` is the target for the iteration (usually a
+    :class:`Name` or :class:`Tuple`), `iter` the iterable.  `body` is a list
+    of nodes that are used as loop-body, and `else_` a list of nodes for the
+    `else` block.  If no else node exists it has to be an empty list.
+
+    For filtered nodes an expression can be stored as `test`, otherwise `None`.
+    """
+
+    fields = ("target", "iter", "body", "else_", "test", "recursive")
+    target: Node
+    iter: Node
+    body: t.List[Node]
+    else_: t.List[Node]
+    test: t.Optional[Node]
+    recursive: bool
+
+
+class If(Stmt):
+    """If `test` is true, `body` is rendered, else `else_`."""
+
+    fields = ("test", "body", "elif_", "else_")
+    test: Node
+    body: t.List[Node]
+    elif_: t.List["If"]
+    else_: t.List[Node]
+
+
+class Macro(Stmt):
+    """A macro definition.  `name` is the name of the macro, `args` a list of
+    arguments and `defaults` a list of defaults if there are any.  `body` is
+    a list of nodes for the macro body.
+    """
+
+    fields = ("name", "args", "defaults", "body")
+    name: str
+    args: t.List["Name"]
+    defaults: t.List["Expr"]
+    body: t.List[Node]
+
+
+class CallBlock(Stmt):
+    """Like a macro without a name but a call instead.  `call` is called with
+    the unnamed macro as `caller` argument this node holds.
+    """
+
+    fields = ("call", "args", "defaults", "body")
+    call: "Call"
+    args: t.List["Name"]
+    defaults: t.List["Expr"]
+    body: t.List[Node]
+
+
+class FilterBlock(Stmt):
+    """Node for filter sections."""
+
+    fields = ("body", "filter")
+    body: t.List[Node]
+    filter: "Filter"
+
+
+class With(Stmt):
+    """Specific node for with statements.  In older versions of Jinja the
+    with statement was implemented on the base of the `Scope` node instead.
+
+    .. versionadded:: 2.9.3
+    """
+
+    fields = ("targets", "values", "body")
+    targets: t.List["Expr"]
+    values: t.List["Expr"]
+    body: t.List[Node]
+
+
+class Block(Stmt):
+    """A node that represents a block.
+
+    .. versionchanged:: 3.0.0
+        the `required` field was added.
+    """
+
+    fields = ("name", "body", "scoped", "required")
+    name: str
+    body: t.List[Node]
+    scoped: bool
+    required: bool
+
+
+class Include(Stmt):
+    """A node that represents the include tag."""
+
+    fields = ("template", "with_context", "ignore_missing")
+    template: "Expr"
+    with_context: bool
+    ignore_missing: bool
+
+
+class Import(Stmt):
+    """A node that represents the import tag."""
+
+    fields = ("template", "target", "with_context")
+    template: "Expr"
+    target: str
+    with_context: bool
+
+
+class FromImport(Stmt):
+    """A node that represents the from import tag.  It's important to not
+    pass unsafe names to the name attribute.  The compiler translates the
+    attribute lookups directly into getattr calls and does *not* use the
+    subscript callback of the interface.  As exported variables may not
+    start with double underscores (which the parser asserts) this is not a
+    problem for regular Jinja code, but if this node is used in an extension
+    extra care must be taken.
+
+    The list of names may contain tuples if aliases are wanted.
+    """
+
+    fields = ("template", "names", "with_context")
+    template: "Expr"
+    names: t.List[t.Union[str, t.Tuple[str, str]]]
+    with_context: bool
+
+
+class ExprStmt(Stmt):
+    """A statement that evaluates an expression and discards the result."""
+
+    fields = ("node",)
+    node: Node
+
+
+class Assign(Stmt):
+    """Assigns an expression to a target."""
+
+    fields = ("target", "node")
+    target: "Expr"
+    node: Node
+
+
+class AssignBlock(Stmt):
+    """Assigns a block to a target."""
+
+    fields = ("target", "filter", "body")
+    target: "Expr"
+    filter: t.Optional["Filter"]
+    body: t.List[Node]
+
+
+class Expr(Node):
+    """Baseclass for all expressions."""
+
+    abstract = True
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        """Return the value of the expression as constant or raise
+        :exc:`Impossible` if this was not possible.
+
+        An :class:`EvalContext` can be provided, if none is given
+        a default context is created which requires the nodes to have
+        an attached environment.
+
+        .. versionchanged:: 2.4
+           the `eval_ctx` parameter was added.
+        """
+        raise Impossible()
+
+    def can_assign(self) -> bool:
+        """Check if it's possible to assign something to this node."""
+        return False
+
+
+class BinExpr(Expr):
+    """Baseclass for all binary expressions."""
+
+    fields = ("left", "right")
+    left: Expr
+    right: Expr
+    operator: str
+    abstract = True
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        # intercepted operators cannot be folded at compile time
+        if (
+            eval_ctx.environment.sandboxed
+            and self.operator in eval_ctx.environment.intercepted_binops  # type: ignore
+        ):
+            raise Impossible()
+        f = _binop_to_func[self.operator]
+        try:
+            return f(self.left.as_const(eval_ctx), self.right.as_const(eval_ctx))
+        except Exception as e:
+            raise Impossible() from e
+
+
+class UnaryExpr(Expr):
+    """Baseclass for all unary expressions."""
+
+    fields = ("node",)
+    node: Expr
+    operator: str
+    abstract = True
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        # intercepted operators cannot be folded at compile time
+        if (
+            eval_ctx.environment.sandboxed
+            and self.operator in eval_ctx.environment.intercepted_unops  # type: ignore
+        ):
+            raise Impossible()
+        f = _uaop_to_func[self.operator]
+        try:
+            return f(self.node.as_const(eval_ctx))
+        except Exception as e:
+            raise Impossible() from e
+
+
+class Name(Expr):
+    """Looks up a name or stores a value in a name.
+    The `ctx` of the node can be one of the following values:
+
+    -   `store`: store a value in the name
+    -   `load`: load that name
+    -   `param`: like `store` but if the name was defined as function parameter.
+    """
+
+    fields = ("name", "ctx")
+    name: str
+    ctx: str
+
+    def can_assign(self) -> bool:
+        return self.name not in {"true", "false", "none", "True", "False", "None"}
+
+
+class NSRef(Expr):
+    """Reference to a namespace value assignment"""
+
+    fields = ("name", "attr")
+    name: str
+    attr: str
+
+    def can_assign(self) -> bool:
+        # We don't need any special checks here; NSRef assignments have a
+        # runtime check to ensure the target is a namespace object which will
+        # have been checked already as it is created using a normal assignment
+        # which goes through a `Name` node.
+        return True
+
+
+class Literal(Expr):
+    """Baseclass for literals."""
+
+    abstract = True
+
+
+class Const(Literal):
+    """All constant values.  The parser will return this node for simple
+    constants such as ``42`` or ``"foo"`` but it can be used to store more
+    complex values such as lists too.  Only constants with a safe
+    representation (objects where ``eval(repr(x)) == x`` is true).
+    """
+
+    fields = ("value",)
+    value: t.Any
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        return self.value
+
+    @classmethod
+    def from_untrusted(
+        cls,
+        value: t.Any,
+        lineno: t.Optional[int] = None,
+        environment: "t.Optional[Environment]" = None,
+    ) -> "Const":
+        """Return a const object if the value is representable as
+        constant value in the generated code, otherwise it will raise
+        an `Impossible` exception.
+        """
+        from .compiler import has_safe_repr
+
+        if not has_safe_repr(value):
+            raise Impossible()
+        return cls(value, lineno=lineno, environment=environment)
+
+
+class TemplateData(Literal):
+    """A constant template string."""
+
+    fields = ("data",)
+    data: str
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> str:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if eval_ctx.volatile:
+            raise Impossible()
+        if eval_ctx.autoescape:
+            return Markup(self.data)
+        return self.data
+
+
+class Tuple(Literal):
+    """For loop unpacking and some other things like multiple arguments
+    for subscripts.  Like for :class:`Name` `ctx` specifies if the tuple
+    is used for loading the names or storing.
+    """
+
+    fields = ("items", "ctx")
+    items: t.List[Expr]
+    ctx: str
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Tuple[t.Any, ...]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return tuple(x.as_const(eval_ctx) for x in self.items)
+
+    def can_assign(self) -> bool:
+        for item in self.items:
+            if not item.can_assign():
+                return False
+        return True
+
+
+class List(Literal):
+    """Any list literal such as ``[1, 2, 3]``"""
+
+    fields = ("items",)
+    items: t.List[Expr]
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.List[t.Any]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return [x.as_const(eval_ctx) for x in self.items]
+
+
+class Dict(Literal):
+    """Any dict literal such as ``{1: 2, 3: 4}``.  The items must be a list of
+    :class:`Pair` nodes.
+    """
+
+    fields = ("items",)
+    items: t.List["Pair"]
+
+    def as_const(
+        self, eval_ctx: t.Optional[EvalContext] = None
+    ) -> t.Dict[t.Any, t.Any]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return dict(x.as_const(eval_ctx) for x in self.items)
+
+
+class Pair(Helper):
+    """A key, value pair for dicts."""
+
+    fields = ("key", "value")
+    key: Expr
+    value: Expr
+
+    def as_const(
+        self, eval_ctx: t.Optional[EvalContext] = None
+    ) -> t.Tuple[t.Any, t.Any]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.key.as_const(eval_ctx), self.value.as_const(eval_ctx)
+
+
+class Keyword(Helper):
+    """A key, value pair for keyword arguments where key is a string."""
+
+    fields = ("key", "value")
+    key: str
+    value: Expr
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Tuple[str, t.Any]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.key, self.value.as_const(eval_ctx)
+
+
+class CondExpr(Expr):
+    """A conditional expression (inline if expression).  (``{{
+    foo if bar else baz }}``)
+    """
+
+    fields = ("test", "expr1", "expr2")
+    test: Expr
+    expr1: Expr
+    expr2: t.Optional[Expr]
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if self.test.as_const(eval_ctx):
+            return self.expr1.as_const(eval_ctx)
+
+        # if we evaluate to an undefined object, we better do that at runtime
+        if self.expr2 is None:
+            raise Impossible()
+
+        return self.expr2.as_const(eval_ctx)
+
+
+def args_as_const(
+    node: t.Union["_FilterTestCommon", "Call"], eval_ctx: t.Optional[EvalContext]
+) -> t.Tuple[t.List[t.Any], t.Dict[t.Any, t.Any]]:
+    args = [x.as_const(eval_ctx) for x in node.args]
+    kwargs = dict(x.as_const(eval_ctx) for x in node.kwargs)
+
+    if node.dyn_args is not None:
+        try:
+            args.extend(node.dyn_args.as_const(eval_ctx))
+        except Exception as e:
+            raise Impossible() from e
+
+    if node.dyn_kwargs is not None:
+        try:
+            kwargs.update(node.dyn_kwargs.as_const(eval_ctx))
+        except Exception as e:
+            raise Impossible() from e
+
+    return args, kwargs
+
+
+class _FilterTestCommon(Expr):
+    fields = ("node", "name", "args", "kwargs", "dyn_args", "dyn_kwargs")
+    node: Expr
+    name: str
+    args: t.List[Expr]
+    kwargs: t.List[Pair]
+    dyn_args: t.Optional[Expr]
+    dyn_kwargs: t.Optional[Expr]
+    abstract = True
+    _is_filter = True
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        if eval_ctx.volatile:
+            raise Impossible()
+
+        if self._is_filter:
+            env_map = eval_ctx.environment.filters
+        else:
+            env_map = eval_ctx.environment.tests
+
+        func = env_map.get(self.name)
+        pass_arg = _PassArg.from_obj(func)  # type: ignore
+
+        if func is None or pass_arg is _PassArg.context:
+            raise Impossible()
+
+        if eval_ctx.environment.is_async and (
+            getattr(func, "jinja_async_variant", False) is True
+            or inspect.iscoroutinefunction(func)
+        ):
+            raise Impossible()
+
+        args, kwargs = args_as_const(self, eval_ctx)
+        args.insert(0, self.node.as_const(eval_ctx))
+
+        if pass_arg is _PassArg.eval_context:
+            args.insert(0, eval_ctx)
+        elif pass_arg is _PassArg.environment:
+            args.insert(0, eval_ctx.environment)
+
+        try:
+            return func(*args, **kwargs)
+        except Exception as e:
+            raise Impossible() from e
+
+
+class Filter(_FilterTestCommon):
+    """Apply a filter to an expression. ``name`` is the name of the
+    filter, the other fields are the same as :class:`Call`.
+
+    If ``node`` is ``None``, the filter is being used in a filter block
+    and is applied to the content of the block.
+    """
+
+    node: t.Optional[Expr]  # type: ignore
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        if self.node is None:
+            raise Impossible()
+
+        return super().as_const(eval_ctx=eval_ctx)
+
+
+class Test(_FilterTestCommon):
+    """Apply a test to an expression. ``name`` is the name of the test,
+    the other field are the same as :class:`Call`.
+
+    .. versionchanged:: 3.0
+        ``as_const`` shares the same logic for filters and tests. Tests
+        check for volatile, async, and ``@pass_context`` etc.
+        decorators.
+    """
+
+    _is_filter = False
+
+
+class Call(Expr):
+    """Calls an expression.  `args` is a list of arguments, `kwargs` a list
+    of keyword arguments (list of :class:`Keyword` nodes), and `dyn_args`
+    and `dyn_kwargs` has to be either `None` or a node that is used as
+    node for dynamic positional (``*args``) or keyword (``**kwargs``)
+    arguments.
+    """
+
+    fields = ("node", "args", "kwargs", "dyn_args", "dyn_kwargs")
+    node: Expr
+    args: t.List[Expr]
+    kwargs: t.List[Keyword]
+    dyn_args: t.Optional[Expr]
+    dyn_kwargs: t.Optional[Expr]
+
+
+class Getitem(Expr):
+    """Get an attribute or item from an expression and prefer the item."""
+
+    fields = ("node", "arg", "ctx")
+    node: Expr
+    arg: Expr
+    ctx: str
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        if self.ctx != "load":
+            raise Impossible()
+
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        try:
+            return eval_ctx.environment.getitem(
+                self.node.as_const(eval_ctx), self.arg.as_const(eval_ctx)
+            )
+        except Exception as e:
+            raise Impossible() from e
+
+
+class Getattr(Expr):
+    """Get an attribute or item from an expression that is a ascii-only
+    bytestring and prefer the attribute.
+    """
+
+    fields = ("node", "attr", "ctx")
+    node: Expr
+    attr: str
+    ctx: str
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        if self.ctx != "load":
+            raise Impossible()
+
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        try:
+            return eval_ctx.environment.getattr(self.node.as_const(eval_ctx), self.attr)
+        except Exception as e:
+            raise Impossible() from e
+
+
+class Slice(Expr):
+    """Represents a slice object.  This must only be used as argument for
+    :class:`Subscript`.
+    """
+
+    fields = ("start", "stop", "step")
+    start: t.Optional[Expr]
+    stop: t.Optional[Expr]
+    step: t.Optional[Expr]
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> slice:
+        eval_ctx = get_eval_context(self, eval_ctx)
+
+        def const(obj: t.Optional[Expr]) -> t.Optional[t.Any]:
+            if obj is None:
+                return None
+            return obj.as_const(eval_ctx)
+
+        return slice(const(self.start), const(self.stop), const(self.step))
+
+
+class Concat(Expr):
+    """Concatenates the list of expressions provided after converting
+    them to strings.
+    """
+
+    fields = ("nodes",)
+    nodes: t.List[Expr]
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> str:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return "".join(str(x.as_const(eval_ctx)) for x in self.nodes)
+
+
+class Compare(Expr):
+    """Compares an expression with some other expressions.  `ops` must be a
+    list of :class:`Operand`\\s.
+    """
+
+    fields = ("expr", "ops")
+    expr: Expr
+    ops: t.List["Operand"]
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        result = value = self.expr.as_const(eval_ctx)
+
+        try:
+            for op in self.ops:
+                new_value = op.expr.as_const(eval_ctx)
+                result = _cmpop_to_func[op.op](value, new_value)
+
+                if not result:
+                    return False
+
+                value = new_value
+        except Exception as e:
+            raise Impossible() from e
+
+        return result
+
+
+class Operand(Helper):
+    """Holds an operator and an expression."""
+
+    fields = ("op", "expr")
+    op: str
+    expr: Expr
+
+
+class Mul(BinExpr):
+    """Multiplies the left with the right node."""
+
+    operator = "*"
+
+
+class Div(BinExpr):
+    """Divides the left by the right node."""
+
+    operator = "/"
+
+
+class FloorDiv(BinExpr):
+    """Divides the left by the right node and converts the
+    result into an integer by truncating.
+    """
+
+    operator = "//"
+
+
+class Add(BinExpr):
+    """Add the left to the right node."""
+
+    operator = "+"
+
+
+class Sub(BinExpr):
+    """Subtract the right from the left node."""
+
+    operator = "-"
+
+
+class Mod(BinExpr):
+    """Left modulo right."""
+
+    operator = "%"
+
+
+class Pow(BinExpr):
+    """Left to the power of right."""
+
+    operator = "**"
+
+
+class And(BinExpr):
+    """Short circuited AND."""
+
+    operator = "and"
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.left.as_const(eval_ctx) and self.right.as_const(eval_ctx)
+
+
+class Or(BinExpr):
+    """Short circuited OR."""
+
+    operator = "or"
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> t.Any:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return self.left.as_const(eval_ctx) or self.right.as_const(eval_ctx)
+
+
+class Not(UnaryExpr):
+    """Negate the expression."""
+
+    operator = "not"
+
+
+class Neg(UnaryExpr):
+    """Make the expression negative."""
+
+    operator = "-"
+
+
+class Pos(UnaryExpr):
+    """Make the expression positive (noop for most expressions)"""
+
+    operator = "+"
+
+
+# Helpers for extensions
+
+
+class EnvironmentAttribute(Expr):
+    """Loads an attribute from the environment object.  This is useful for
+    extensions that want to call a callback stored on the environment.
+    """
+
+    fields = ("name",)
+    name: str
+
+
+class ExtensionAttribute(Expr):
+    """Returns the attribute of an extension bound to the environment.
+    The identifier is the identifier of the :class:`Extension`.
+
+    This node is usually constructed by calling the
+    :meth:`~jinja2.ext.Extension.attr` method on an extension.
+    """
+
+    fields = ("identifier", "name")
+    identifier: str
+    name: str
+
+
+class ImportedName(Expr):
+    """If created with an import name the import name is returned on node
+    access.  For example ``ImportedName('cgi.escape')`` returns the `escape`
+    function from the cgi module on evaluation.  Imports are optimized by the
+    compiler so there is no need to assign them to local variables.
+    """
+
+    fields = ("importname",)
+    importname: str
+
+
+class InternalName(Expr):
+    """An internal name in the compiler.  You cannot create these nodes
+    yourself but the parser provides a
+    :meth:`~jinja2.parser.Parser.free_identifier` method that creates
+    a new identifier for you.  This identifier is not available from the
+    template and is not treated specially by the compiler.
+    """
+
+    fields = ("name",)
+    name: str
+
+    def __init__(self) -> None:
+        raise TypeError(
+            "Can't create internal names.  Use the "
+            "`free_identifier` method on a parser."
+        )
+
+
+class MarkSafe(Expr):
+    """Mark the wrapped expression as safe (wrap it as `Markup`)."""
+
+    fields = ("expr",)
+    expr: Expr
+
+    def as_const(self, eval_ctx: t.Optional[EvalContext] = None) -> Markup:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        return Markup(self.expr.as_const(eval_ctx))
+
+
+class MarkSafeIfAutoescape(Expr):
+    """Mark the wrapped expression as safe (wrap it as `Markup`) but
+    only if autoescaping is active.
+
+    .. versionadded:: 2.5
+    """
+
+    fields = ("expr",)
+    expr: Expr
+
+    def as_const(
+        self, eval_ctx: t.Optional[EvalContext] = None
+    ) -> t.Union[Markup, t.Any]:
+        eval_ctx = get_eval_context(self, eval_ctx)
+        if eval_ctx.volatile:
+            raise Impossible()
+        expr = self.expr.as_const(eval_ctx)
+        if eval_ctx.autoescape:
+            return Markup(expr)
+        return expr
+
+
+class ContextReference(Expr):
+    """Returns the current template context.  It can be used like a
+    :class:`Name` node, with a ``'load'`` ctx and will return the
+    current :class:`~jinja2.runtime.Context` object.
+
+    Here an example that assigns the current template name to a
+    variable named `foo`::
+
+        Assign(Name('foo', ctx='store'),
+               Getattr(ContextReference(), 'name'))
+
+    This is basically equivalent to using the
+    :func:`~jinja2.pass_context` decorator when using the high-level
+    API, which causes a reference to the context to be passed as the
+    first argument to a function.
+    """
+
+
+class DerivedContextReference(Expr):
+    """Return the current template context including locals. Behaves
+    exactly like :class:`ContextReference`, but includes local
+    variables, such as from a ``for`` loop.
+
+    .. versionadded:: 2.11
+    """
+
+
+class Continue(Stmt):
+    """Continue a loop."""
+
+
+class Break(Stmt):
+    """Break a loop."""
+
+
+class Scope(Stmt):
+    """An artificial scope."""
+
+    fields = ("body",)
+    body: t.List[Node]
+
+
+class OverlayScope(Stmt):
+    """An overlay scope for extensions.  This is a largely unoptimized scope
+    that however can be used to introduce completely arbitrary variables into
+    a sub scope from a dictionary or dictionary like object.  The `context`
+    field has to evaluate to a dictionary object.
+
+    Example usage::
+
+        OverlayScope(context=self.call_method('get_context'),
+                     body=[...])
+
+    .. versionadded:: 2.10
+    """
+
+    fields = ("context", "body")
+    context: Expr
+    body: t.List[Node]
+
+
+class EvalContextModifier(Stmt):
+    """Modifies the eval context.  For each option that should be modified,
+    a :class:`Keyword` has to be added to the :attr:`options` list.
+
+    Example to change the `autoescape` setting::
+
+        EvalContextModifier(options=[Keyword('autoescape', Const(True))])
+    """
+
+    fields = ("options",)
+    options: t.List[Keyword]
+
+
+class ScopedEvalContextModifier(EvalContextModifier):
+    """Modifies the eval context and reverts it later.  Works exactly like
+    :class:`EvalContextModifier` but will only modify the
+    :class:`~jinja2.nodes.EvalContext` for nodes in the :attr:`body`.
+    """
+
+    fields = ("body",)
+    body: t.List[Node]
+
+
+# make sure nobody creates custom nodes
+def _failing_new(*args: t.Any, **kwargs: t.Any) -> "te.NoReturn":
+    raise TypeError("can't create custom node types")
+
+
+NodeType.__new__ = staticmethod(_failing_new)  # type: ignore
+del _failing_new
diff --git a/venv/lib/python3.9/site-packages/jinja2/optimizer.py b/venv/lib/python3.9/site-packages/jinja2/optimizer.py
new file mode 100644
index 0000000..fe10107
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/optimizer.py
@@ -0,0 +1,47 @@
+"""The optimizer tries to constant fold expressions and modify the AST
+in place so that it should be faster to evaluate.
+
+Because the AST does not contain all the scoping information and the
+compiler has to find that out, we cannot do all the optimizations we
+want. For example, loop unrolling doesn't work because unrolled loops
+would have a different scope. The solution would be a second syntax tree
+that stored the scoping rules.
+"""
+import typing as t
+
+from . import nodes
+from .visitor import NodeTransformer
+
+if t.TYPE_CHECKING:
+    from .environment import Environment
+
+
+def optimize(node: nodes.Node, environment: "Environment") -> nodes.Node:
+    """The context hint can be used to perform an static optimization
+    based on the context given."""
+    optimizer = Optimizer(environment)
+    return t.cast(nodes.Node, optimizer.visit(node))
+
+
+class Optimizer(NodeTransformer):
+    def __init__(self, environment: "t.Optional[Environment]") -> None:
+        self.environment = environment
+
+    def generic_visit(
+        self, node: nodes.Node, *args: t.Any, **kwargs: t.Any
+    ) -> nodes.Node:
+        node = super().generic_visit(node, *args, **kwargs)
+
+        # Do constant folding. Some other nodes besides Expr have
+        # as_const, but folding them causes errors later on.
+        if isinstance(node, nodes.Expr):
+            try:
+                return nodes.Const.from_untrusted(
+                    node.as_const(args[0] if args else None),
+                    lineno=node.lineno,
+                    environment=self.environment,
+                )
+            except nodes.Impossible:
+                pass
+
+        return node
diff --git a/venv/lib/python3.9/site-packages/jinja2/parser.py b/venv/lib/python3.9/site-packages/jinja2/parser.py
new file mode 100644
index 0000000..cefce2d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/parser.py
@@ -0,0 +1,1032 @@
+"""Parse tokens from the lexer into nodes for the compiler."""
+import typing
+import typing as t
+
+from . import nodes
+from .exceptions import TemplateAssertionError
+from .exceptions import TemplateSyntaxError
+from .lexer import describe_token
+from .lexer import describe_token_expr
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+    from .environment import Environment
+
+_ImportInclude = t.TypeVar("_ImportInclude", nodes.Import, nodes.Include)
+_MacroCall = t.TypeVar("_MacroCall", nodes.Macro, nodes.CallBlock)
+
+_statement_keywords = frozenset(
+    [
+        "for",
+        "if",
+        "block",
+        "extends",
+        "print",
+        "macro",
+        "include",
+        "from",
+        "import",
+        "set",
+        "with",
+        "autoescape",
+    ]
+)
+_compare_operators = frozenset(["eq", "ne", "lt", "lteq", "gt", "gteq"])
+
+_math_nodes: t.Dict[str, t.Type[nodes.Expr]] = {
+    "add": nodes.Add,
+    "sub": nodes.Sub,
+    "mul": nodes.Mul,
+    "div": nodes.Div,
+    "floordiv": nodes.FloorDiv,
+    "mod": nodes.Mod,
+}
+
+
+class Parser:
+    """This is the central parsing class Jinja uses.  It's passed to
+    extensions and can be used to parse expressions or statements.
+    """
+
+    def __init__(
+        self,
+        environment: "Environment",
+        source: str,
+        name: t.Optional[str] = None,
+        filename: t.Optional[str] = None,
+        state: t.Optional[str] = None,
+    ) -> None:
+        self.environment = environment
+        self.stream = environment._tokenize(source, name, filename, state)
+        self.name = name
+        self.filename = filename
+        self.closed = False
+        self.extensions: t.Dict[
+            str, t.Callable[["Parser"], t.Union[nodes.Node, t.List[nodes.Node]]]
+        ] = {}
+        for extension in environment.iter_extensions():
+            for tag in extension.tags:
+                self.extensions[tag] = extension.parse
+        self._last_identifier = 0
+        self._tag_stack: t.List[str] = []
+        self._end_token_stack: t.List[t.Tuple[str, ...]] = []
+
+    def fail(
+        self,
+        msg: str,
+        lineno: t.Optional[int] = None,
+        exc: t.Type[TemplateSyntaxError] = TemplateSyntaxError,
+    ) -> "te.NoReturn":
+        """Convenience method that raises `exc` with the message, passed
+        line number or last line number as well as the current name and
+        filename.
+        """
+        if lineno is None:
+            lineno = self.stream.current.lineno
+        raise exc(msg, lineno, self.name, self.filename)
+
+    def _fail_ut_eof(
+        self,
+        name: t.Optional[str],
+        end_token_stack: t.List[t.Tuple[str, ...]],
+        lineno: t.Optional[int],
+    ) -> "te.NoReturn":
+        expected: t.Set[str] = set()
+        for exprs in end_token_stack:
+            expected.update(map(describe_token_expr, exprs))
+        if end_token_stack:
+            currently_looking: t.Optional[str] = " or ".join(
+                map(repr, map(describe_token_expr, end_token_stack[-1]))
+            )
+        else:
+            currently_looking = None
+
+        if name is None:
+            message = ["Unexpected end of template."]
+        else:
+            message = [f"Encountered unknown tag {name!r}."]
+
+        if currently_looking:
+            if name is not None and name in expected:
+                message.append(
+                    "You probably made a nesting mistake. Jinja is expecting this tag,"
+                    f" but currently looking for {currently_looking}."
+                )
+            else:
+                message.append(
+                    f"Jinja was looking for the following tags: {currently_looking}."
+                )
+
+        if self._tag_stack:
+            message.append(
+                "The innermost block that needs to be closed is"
+                f" {self._tag_stack[-1]!r}."
+            )
+
+        self.fail(" ".join(message), lineno)
+
+    def fail_unknown_tag(
+        self, name: str, lineno: t.Optional[int] = None
+    ) -> "te.NoReturn":
+        """Called if the parser encounters an unknown tag.  Tries to fail
+        with a human readable error message that could help to identify
+        the problem.
+        """
+        self._fail_ut_eof(name, self._end_token_stack, lineno)
+
+    def fail_eof(
+        self,
+        end_tokens: t.Optional[t.Tuple[str, ...]] = None,
+        lineno: t.Optional[int] = None,
+    ) -> "te.NoReturn":
+        """Like fail_unknown_tag but for end of template situations."""
+        stack = list(self._end_token_stack)
+        if end_tokens is not None:
+            stack.append(end_tokens)
+        self._fail_ut_eof(None, stack, lineno)
+
+    def is_tuple_end(
+        self, extra_end_rules: t.Optional[t.Tuple[str, ...]] = None
+    ) -> bool:
+        """Are we at the end of a tuple?"""
+        if self.stream.current.type in ("variable_end", "block_end", "rparen"):
+            return True
+        elif extra_end_rules is not None:
+            return self.stream.current.test_any(extra_end_rules)  # type: ignore
+        return False
+
+    def free_identifier(self, lineno: t.Optional[int] = None) -> nodes.InternalName:
+        """Return a new free identifier as :class:`~jinja2.nodes.InternalName`."""
+        self._last_identifier += 1
+        rv = object.__new__(nodes.InternalName)
+        nodes.Node.__init__(rv, f"fi{self._last_identifier}", lineno=lineno)
+        return rv
+
+    def parse_statement(self) -> t.Union[nodes.Node, t.List[nodes.Node]]:
+        """Parse a single statement."""
+        token = self.stream.current
+        if token.type != "name":
+            self.fail("tag name expected", token.lineno)
+        self._tag_stack.append(token.value)
+        pop_tag = True
+        try:
+            if token.value in _statement_keywords:
+                f = getattr(self, f"parse_{self.stream.current.value}")
+                return f()  # type: ignore
+            if token.value == "call":
+                return self.parse_call_block()
+            if token.value == "filter":
+                return self.parse_filter_block()
+            ext = self.extensions.get(token.value)
+            if ext is not None:
+                return ext(self)
+
+            # did not work out, remove the token we pushed by accident
+            # from the stack so that the unknown tag fail function can
+            # produce a proper error message.
+            self._tag_stack.pop()
+            pop_tag = False
+            self.fail_unknown_tag(token.value, token.lineno)
+        finally:
+            if pop_tag:
+                self._tag_stack.pop()
+
+    def parse_statements(
+        self, end_tokens: t.Tuple[str, ...], drop_needle: bool = False
+    ) -> t.List[nodes.Node]:
+        """Parse multiple statements into a list until one of the end tokens
+        is reached.  This is used to parse the body of statements as it also
+        parses template data if appropriate.  The parser checks first if the
+        current token is a colon and skips it if there is one.  Then it checks
+        for the block end and parses until if one of the `end_tokens` is
+        reached.  Per default the active token in the stream at the end of
+        the call is the matched end token.  If this is not wanted `drop_needle`
+        can be set to `True` and the end token is removed.
+        """
+        # the first token may be a colon for python compatibility
+        self.stream.skip_if("colon")
+
+        # in the future it would be possible to add whole code sections
+        # by adding some sort of end of statement token and parsing those here.
+        self.stream.expect("block_end")
+        result = self.subparse(end_tokens)
+
+        # we reached the end of the template too early, the subparser
+        # does not check for this, so we do that now
+        if self.stream.current.type == "eof":
+            self.fail_eof(end_tokens)
+
+        if drop_needle:
+            next(self.stream)
+        return result
+
+    def parse_set(self) -> t.Union[nodes.Assign, nodes.AssignBlock]:
+        """Parse an assign statement."""
+        lineno = next(self.stream).lineno
+        target = self.parse_assign_target(with_namespace=True)
+        if self.stream.skip_if("assign"):
+            expr = self.parse_tuple()
+            return nodes.Assign(target, expr, lineno=lineno)
+        filter_node = self.parse_filter(None)
+        body = self.parse_statements(("name:endset",), drop_needle=True)
+        return nodes.AssignBlock(target, filter_node, body, lineno=lineno)
+
+    def parse_for(self) -> nodes.For:
+        """Parse a for loop."""
+        lineno = self.stream.expect("name:for").lineno
+        target = self.parse_assign_target(extra_end_rules=("name:in",))
+        self.stream.expect("name:in")
+        iter = self.parse_tuple(
+            with_condexpr=False, extra_end_rules=("name:recursive",)
+        )
+        test = None
+        if self.stream.skip_if("name:if"):
+            test = self.parse_expression()
+        recursive = self.stream.skip_if("name:recursive")
+        body = self.parse_statements(("name:endfor", "name:else"))
+        if next(self.stream).value == "endfor":
+            else_ = []
+        else:
+            else_ = self.parse_statements(("name:endfor",), drop_needle=True)
+        return nodes.For(target, iter, body, else_, test, recursive, lineno=lineno)
+
+    def parse_if(self) -> nodes.If:
+        """Parse an if construct."""
+        node = result = nodes.If(lineno=self.stream.expect("name:if").lineno)
+        while True:
+            node.test = self.parse_tuple(with_condexpr=False)
+            node.body = self.parse_statements(("name:elif", "name:else", "name:endif"))
+            node.elif_ = []
+            node.else_ = []
+            token = next(self.stream)
+            if token.test("name:elif"):
+                node = nodes.If(lineno=self.stream.current.lineno)
+                result.elif_.append(node)
+                continue
+            elif token.test("name:else"):
+                result.else_ = self.parse_statements(("name:endif",), drop_needle=True)
+            break
+        return result
+
+    def parse_with(self) -> nodes.With:
+        node = nodes.With(lineno=next(self.stream).lineno)
+        targets: t.List[nodes.Expr] = []
+        values: t.List[nodes.Expr] = []
+        while self.stream.current.type != "block_end":
+            if targets:
+                self.stream.expect("comma")
+            target = self.parse_assign_target()
+            target.set_ctx("param")
+            targets.append(target)
+            self.stream.expect("assign")
+            values.append(self.parse_expression())
+        node.targets = targets
+        node.values = values
+        node.body = self.parse_statements(("name:endwith",), drop_needle=True)
+        return node
+
+    def parse_autoescape(self) -> nodes.Scope:
+        node = nodes.ScopedEvalContextModifier(lineno=next(self.stream).lineno)
+        node.options = [nodes.Keyword("autoescape", self.parse_expression())]
+        node.body = self.parse_statements(("name:endautoescape",), drop_needle=True)
+        return nodes.Scope([node])
+
+    def parse_block(self) -> nodes.Block:
+        node = nodes.Block(lineno=next(self.stream).lineno)
+        node.name = self.stream.expect("name").value
+        node.scoped = self.stream.skip_if("name:scoped")
+        node.required = self.stream.skip_if("name:required")
+
+        # common problem people encounter when switching from django
+        # to jinja.  we do not support hyphens in block names, so let's
+        # raise a nicer error message in that case.
+        if self.stream.current.type == "sub":
+            self.fail(
+                "Block names in Jinja have to be valid Python identifiers and may not"
+                " contain hyphens, use an underscore instead."
+            )
+
+        node.body = self.parse_statements(("name:endblock",), drop_needle=True)
+
+        # enforce that required blocks only contain whitespace or comments
+        # by asserting that the body, if not empty, is just TemplateData nodes
+        # with whitespace data
+        if node.required and not all(
+            isinstance(child, nodes.TemplateData) and child.data.isspace()
+            for body in node.body
+            for child in body.nodes  # type: ignore
+        ):
+            self.fail("Required blocks can only contain comments or whitespace")
+
+        self.stream.skip_if("name:" + node.name)
+        return node
+
+    def parse_extends(self) -> nodes.Extends:
+        node = nodes.Extends(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        return node
+
+    def parse_import_context(
+        self, node: _ImportInclude, default: bool
+    ) -> _ImportInclude:
+        if self.stream.current.test_any(
+            "name:with", "name:without"
+        ) and self.stream.look().test("name:context"):
+            node.with_context = next(self.stream).value == "with"
+            self.stream.skip()
+        else:
+            node.with_context = default
+        return node
+
+    def parse_include(self) -> nodes.Include:
+        node = nodes.Include(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        if self.stream.current.test("name:ignore") and self.stream.look().test(
+            "name:missing"
+        ):
+            node.ignore_missing = True
+            self.stream.skip(2)
+        else:
+            node.ignore_missing = False
+        return self.parse_import_context(node, True)
+
+    def parse_import(self) -> nodes.Import:
+        node = nodes.Import(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        self.stream.expect("name:as")
+        node.target = self.parse_assign_target(name_only=True).name
+        return self.parse_import_context(node, False)
+
+    def parse_from(self) -> nodes.FromImport:
+        node = nodes.FromImport(lineno=next(self.stream).lineno)
+        node.template = self.parse_expression()
+        self.stream.expect("name:import")
+        node.names = []
+
+        def parse_context() -> bool:
+            if self.stream.current.value in {
+                "with",
+                "without",
+            } and self.stream.look().test("name:context"):
+                node.with_context = next(self.stream).value == "with"
+                self.stream.skip()
+                return True
+            return False
+
+        while True:
+            if node.names:
+                self.stream.expect("comma")
+            if self.stream.current.type == "name":
+                if parse_context():
+                    break
+                target = self.parse_assign_target(name_only=True)
+                if target.name.startswith("_"):
+                    self.fail(
+                        "names starting with an underline can not be imported",
+                        target.lineno,
+                        exc=TemplateAssertionError,
+                    )
+                if self.stream.skip_if("name:as"):
+                    alias = self.parse_assign_target(name_only=True)
+                    node.names.append((target.name, alias.name))
+                else:
+                    node.names.append(target.name)
+                if parse_context() or self.stream.current.type != "comma":
+                    break
+            else:
+                self.stream.expect("name")
+        if not hasattr(node, "with_context"):
+            node.with_context = False
+        return node
+
+    def parse_signature(self, node: _MacroCall) -> None:
+        args = node.args = []
+        defaults = node.defaults = []
+        self.stream.expect("lparen")
+        while self.stream.current.type != "rparen":
+            if args:
+                self.stream.expect("comma")
+            arg = self.parse_assign_target(name_only=True)
+            arg.set_ctx("param")
+            if self.stream.skip_if("assign"):
+                defaults.append(self.parse_expression())
+            elif defaults:
+                self.fail("non-default argument follows default argument")
+            args.append(arg)
+        self.stream.expect("rparen")
+
+    def parse_call_block(self) -> nodes.CallBlock:
+        node = nodes.CallBlock(lineno=next(self.stream).lineno)
+        if self.stream.current.type == "lparen":
+            self.parse_signature(node)
+        else:
+            node.args = []
+            node.defaults = []
+
+        call_node = self.parse_expression()
+        if not isinstance(call_node, nodes.Call):
+            self.fail("expected call", node.lineno)
+        node.call = call_node
+        node.body = self.parse_statements(("name:endcall",), drop_needle=True)
+        return node
+
+    def parse_filter_block(self) -> nodes.FilterBlock:
+        node = nodes.FilterBlock(lineno=next(self.stream).lineno)
+        node.filter = self.parse_filter(None, start_inline=True)  # type: ignore
+        node.body = self.parse_statements(("name:endfilter",), drop_needle=True)
+        return node
+
+    def parse_macro(self) -> nodes.Macro:
+        node = nodes.Macro(lineno=next(self.stream).lineno)
+        node.name = self.parse_assign_target(name_only=True).name
+        self.parse_signature(node)
+        node.body = self.parse_statements(("name:endmacro",), drop_needle=True)
+        return node
+
+    def parse_print(self) -> nodes.Output:
+        node = nodes.Output(lineno=next(self.stream).lineno)
+        node.nodes = []
+        while self.stream.current.type != "block_end":
+            if node.nodes:
+                self.stream.expect("comma")
+            node.nodes.append(self.parse_expression())
+        return node
+
+    @typing.overload
+    def parse_assign_target(
+        self, with_tuple: bool = ..., name_only: "te.Literal[True]" = ...
+    ) -> nodes.Name:
+        ...
+
+    @typing.overload
+    def parse_assign_target(
+        self,
+        with_tuple: bool = True,
+        name_only: bool = False,
+        extra_end_rules: t.Optional[t.Tuple[str, ...]] = None,
+        with_namespace: bool = False,
+    ) -> t.Union[nodes.NSRef, nodes.Name, nodes.Tuple]:
+        ...
+
+    def parse_assign_target(
+        self,
+        with_tuple: bool = True,
+        name_only: bool = False,
+        extra_end_rules: t.Optional[t.Tuple[str, ...]] = None,
+        with_namespace: bool = False,
+    ) -> t.Union[nodes.NSRef, nodes.Name, nodes.Tuple]:
+        """Parse an assignment target.  As Jinja allows assignments to
+        tuples, this function can parse all allowed assignment targets.  Per
+        default assignments to tuples are parsed, that can be disable however
+        by setting `with_tuple` to `False`.  If only assignments to names are
+        wanted `name_only` can be set to `True`.  The `extra_end_rules`
+        parameter is forwarded to the tuple parsing function.  If
+        `with_namespace` is enabled, a namespace assignment may be parsed.
+        """
+        target: nodes.Expr
+
+        if with_namespace and self.stream.look().type == "dot":
+            token = self.stream.expect("name")
+            next(self.stream)  # dot
+            attr = self.stream.expect("name")
+            target = nodes.NSRef(token.value, attr.value, lineno=token.lineno)
+        elif name_only:
+            token = self.stream.expect("name")
+            target = nodes.Name(token.value, "store", lineno=token.lineno)
+        else:
+            if with_tuple:
+                target = self.parse_tuple(
+                    simplified=True, extra_end_rules=extra_end_rules
+                )
+            else:
+                target = self.parse_primary()
+
+            target.set_ctx("store")
+
+        if not target.can_assign():
+            self.fail(
+                f"can't assign to {type(target).__name__.lower()!r}", target.lineno
+            )
+
+        return target  # type: ignore
+
+    def parse_expression(self, with_condexpr: bool = True) -> nodes.Expr:
+        """Parse an expression.  Per default all expressions are parsed, if
+        the optional `with_condexpr` parameter is set to `False` conditional
+        expressions are not parsed.
+        """
+        if with_condexpr:
+            return self.parse_condexpr()
+        return self.parse_or()
+
+    def parse_condexpr(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        expr1 = self.parse_or()
+        expr3: t.Optional[nodes.Expr]
+
+        while self.stream.skip_if("name:if"):
+            expr2 = self.parse_or()
+            if self.stream.skip_if("name:else"):
+                expr3 = self.parse_condexpr()
+            else:
+                expr3 = None
+            expr1 = nodes.CondExpr(expr2, expr1, expr3, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return expr1
+
+    def parse_or(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        left = self.parse_and()
+        while self.stream.skip_if("name:or"):
+            right = self.parse_and()
+            left = nodes.Or(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_and(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        left = self.parse_not()
+        while self.stream.skip_if("name:and"):
+            right = self.parse_not()
+            left = nodes.And(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_not(self) -> nodes.Expr:
+        if self.stream.current.test("name:not"):
+            lineno = next(self.stream).lineno
+            return nodes.Not(self.parse_not(), lineno=lineno)
+        return self.parse_compare()
+
+    def parse_compare(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        expr = self.parse_math1()
+        ops = []
+        while True:
+            token_type = self.stream.current.type
+            if token_type in _compare_operators:
+                next(self.stream)
+                ops.append(nodes.Operand(token_type, self.parse_math1()))
+            elif self.stream.skip_if("name:in"):
+                ops.append(nodes.Operand("in", self.parse_math1()))
+            elif self.stream.current.test("name:not") and self.stream.look().test(
+                "name:in"
+            ):
+                self.stream.skip(2)
+                ops.append(nodes.Operand("notin", self.parse_math1()))
+            else:
+                break
+            lineno = self.stream.current.lineno
+        if not ops:
+            return expr
+        return nodes.Compare(expr, ops, lineno=lineno)
+
+    def parse_math1(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        left = self.parse_concat()
+        while self.stream.current.type in ("add", "sub"):
+            cls = _math_nodes[self.stream.current.type]
+            next(self.stream)
+            right = self.parse_concat()
+            left = cls(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_concat(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        args = [self.parse_math2()]
+        while self.stream.current.type == "tilde":
+            next(self.stream)
+            args.append(self.parse_math2())
+        if len(args) == 1:
+            return args[0]
+        return nodes.Concat(args, lineno=lineno)
+
+    def parse_math2(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        left = self.parse_pow()
+        while self.stream.current.type in ("mul", "div", "floordiv", "mod"):
+            cls = _math_nodes[self.stream.current.type]
+            next(self.stream)
+            right = self.parse_pow()
+            left = cls(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_pow(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        left = self.parse_unary()
+        while self.stream.current.type == "pow":
+            next(self.stream)
+            right = self.parse_unary()
+            left = nodes.Pow(left, right, lineno=lineno)
+            lineno = self.stream.current.lineno
+        return left
+
+    def parse_unary(self, with_filter: bool = True) -> nodes.Expr:
+        token_type = self.stream.current.type
+        lineno = self.stream.current.lineno
+        node: nodes.Expr
+
+        if token_type == "sub":
+            next(self.stream)
+            node = nodes.Neg(self.parse_unary(False), lineno=lineno)
+        elif token_type == "add":
+            next(self.stream)
+            node = nodes.Pos(self.parse_unary(False), lineno=lineno)
+        else:
+            node = self.parse_primary()
+        node = self.parse_postfix(node)
+        if with_filter:
+            node = self.parse_filter_expr(node)
+        return node
+
+    def parse_primary(self) -> nodes.Expr:
+        token = self.stream.current
+        node: nodes.Expr
+        if token.type == "name":
+            if token.value in ("true", "false", "True", "False"):
+                node = nodes.Const(token.value in ("true", "True"), lineno=token.lineno)
+            elif token.value in ("none", "None"):
+                node = nodes.Const(None, lineno=token.lineno)
+            else:
+                node = nodes.Name(token.value, "load", lineno=token.lineno)
+            next(self.stream)
+        elif token.type == "string":
+            next(self.stream)
+            buf = [token.value]
+            lineno = token.lineno
+            while self.stream.current.type == "string":
+                buf.append(self.stream.current.value)
+                next(self.stream)
+            node = nodes.Const("".join(buf), lineno=lineno)
+        elif token.type in ("integer", "float"):
+            next(self.stream)
+            node = nodes.Const(token.value, lineno=token.lineno)
+        elif token.type == "lparen":
+            next(self.stream)
+            node = self.parse_tuple(explicit_parentheses=True)
+            self.stream.expect("rparen")
+        elif token.type == "lbracket":
+            node = self.parse_list()
+        elif token.type == "lbrace":
+            node = self.parse_dict()
+        else:
+            self.fail(f"unexpected {describe_token(token)!r}", token.lineno)
+        return node
+
+    def parse_tuple(
+        self,
+        simplified: bool = False,
+        with_condexpr: bool = True,
+        extra_end_rules: t.Optional[t.Tuple[str, ...]] = None,
+        explicit_parentheses: bool = False,
+    ) -> t.Union[nodes.Tuple, nodes.Expr]:
+        """Works like `parse_expression` but if multiple expressions are
+        delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
+        This method could also return a regular expression instead of a tuple
+        if no commas where found.
+
+        The default parsing mode is a full tuple.  If `simplified` is `True`
+        only names and literals are parsed.  The `no_condexpr` parameter is
+        forwarded to :meth:`parse_expression`.
+
+        Because tuples do not require delimiters and may end in a bogus comma
+        an extra hint is needed that marks the end of a tuple.  For example
+        for loops support tuples between `for` and `in`.  In that case the
+        `extra_end_rules` is set to ``['name:in']``.
+
+        `explicit_parentheses` is true if the parsing was triggered by an
+        expression in parentheses.  This is used to figure out if an empty
+        tuple is a valid expression or not.
+        """
+        lineno = self.stream.current.lineno
+        if simplified:
+            parse = self.parse_primary
+        elif with_condexpr:
+            parse = self.parse_expression
+        else:
+
+            def parse() -> nodes.Expr:
+                return self.parse_expression(with_condexpr=False)
+
+        args: t.List[nodes.Expr] = []
+        is_tuple = False
+
+        while True:
+            if args:
+                self.stream.expect("comma")
+            if self.is_tuple_end(extra_end_rules):
+                break
+            args.append(parse())
+            if self.stream.current.type == "comma":
+                is_tuple = True
+            else:
+                break
+            lineno = self.stream.current.lineno
+
+        if not is_tuple:
+            if args:
+                return args[0]
+
+            # if we don't have explicit parentheses, an empty tuple is
+            # not a valid expression.  This would mean nothing (literally
+            # nothing) in the spot of an expression would be an empty
+            # tuple.
+            if not explicit_parentheses:
+                self.fail(
+                    "Expected an expression,"
+                    f" got {describe_token(self.stream.current)!r}"
+                )
+
+        return nodes.Tuple(args, "load", lineno=lineno)
+
+    def parse_list(self) -> nodes.List:
+        token = self.stream.expect("lbracket")
+        items: t.List[nodes.Expr] = []
+        while self.stream.current.type != "rbracket":
+            if items:
+                self.stream.expect("comma")
+            if self.stream.current.type == "rbracket":
+                break
+            items.append(self.parse_expression())
+        self.stream.expect("rbracket")
+        return nodes.List(items, lineno=token.lineno)
+
+    def parse_dict(self) -> nodes.Dict:
+        token = self.stream.expect("lbrace")
+        items: t.List[nodes.Pair] = []
+        while self.stream.current.type != "rbrace":
+            if items:
+                self.stream.expect("comma")
+            if self.stream.current.type == "rbrace":
+                break
+            key = self.parse_expression()
+            self.stream.expect("colon")
+            value = self.parse_expression()
+            items.append(nodes.Pair(key, value, lineno=key.lineno))
+        self.stream.expect("rbrace")
+        return nodes.Dict(items, lineno=token.lineno)
+
+    def parse_postfix(self, node: nodes.Expr) -> nodes.Expr:
+        while True:
+            token_type = self.stream.current.type
+            if token_type == "dot" or token_type == "lbracket":
+                node = self.parse_subscript(node)
+            # calls are valid both after postfix expressions (getattr
+            # and getitem) as well as filters and tests
+            elif token_type == "lparen":
+                node = self.parse_call(node)
+            else:
+                break
+        return node
+
+    def parse_filter_expr(self, node: nodes.Expr) -> nodes.Expr:
+        while True:
+            token_type = self.stream.current.type
+            if token_type == "pipe":
+                node = self.parse_filter(node)  # type: ignore
+            elif token_type == "name" and self.stream.current.value == "is":
+                node = self.parse_test(node)
+            # calls are valid both after postfix expressions (getattr
+            # and getitem) as well as filters and tests
+            elif token_type == "lparen":
+                node = self.parse_call(node)
+            else:
+                break
+        return node
+
+    def parse_subscript(
+        self, node: nodes.Expr
+    ) -> t.Union[nodes.Getattr, nodes.Getitem]:
+        token = next(self.stream)
+        arg: nodes.Expr
+
+        if token.type == "dot":
+            attr_token = self.stream.current
+            next(self.stream)
+            if attr_token.type == "name":
+                return nodes.Getattr(
+                    node, attr_token.value, "load", lineno=token.lineno
+                )
+            elif attr_token.type != "integer":
+                self.fail("expected name or number", attr_token.lineno)
+            arg = nodes.Const(attr_token.value, lineno=attr_token.lineno)
+            return nodes.Getitem(node, arg, "load", lineno=token.lineno)
+        if token.type == "lbracket":
+            args: t.List[nodes.Expr] = []
+            while self.stream.current.type != "rbracket":
+                if args:
+                    self.stream.expect("comma")
+                args.append(self.parse_subscribed())
+            self.stream.expect("rbracket")
+            if len(args) == 1:
+                arg = args[0]
+            else:
+                arg = nodes.Tuple(args, "load", lineno=token.lineno)
+            return nodes.Getitem(node, arg, "load", lineno=token.lineno)
+        self.fail("expected subscript expression", token.lineno)
+
+    def parse_subscribed(self) -> nodes.Expr:
+        lineno = self.stream.current.lineno
+        args: t.List[t.Optional[nodes.Expr]]
+
+        if self.stream.current.type == "colon":
+            next(self.stream)
+            args = [None]
+        else:
+            node = self.parse_expression()
+            if self.stream.current.type != "colon":
+                return node
+            next(self.stream)
+            args = [node]
+
+        if self.stream.current.type == "colon":
+            args.append(None)
+        elif self.stream.current.type not in ("rbracket", "comma"):
+            args.append(self.parse_expression())
+        else:
+            args.append(None)
+
+        if self.stream.current.type == "colon":
+            next(self.stream)
+            if self.stream.current.type not in ("rbracket", "comma"):
+                args.append(self.parse_expression())
+            else:
+                args.append(None)
+        else:
+            args.append(None)
+
+        return nodes.Slice(lineno=lineno, *args)
+
+    def parse_call_args(self) -> t.Tuple:
+        token = self.stream.expect("lparen")
+        args = []
+        kwargs = []
+        dyn_args = None
+        dyn_kwargs = None
+        require_comma = False
+
+        def ensure(expr: bool) -> None:
+            if not expr:
+                self.fail("invalid syntax for function call expression", token.lineno)
+
+        while self.stream.current.type != "rparen":
+            if require_comma:
+                self.stream.expect("comma")
+
+                # support for trailing comma
+                if self.stream.current.type == "rparen":
+                    break
+
+            if self.stream.current.type == "mul":
+                ensure(dyn_args is None and dyn_kwargs is None)
+                next(self.stream)
+                dyn_args = self.parse_expression()
+            elif self.stream.current.type == "pow":
+                ensure(dyn_kwargs is None)
+                next(self.stream)
+                dyn_kwargs = self.parse_expression()
+            else:
+                if (
+                    self.stream.current.type == "name"
+                    and self.stream.look().type == "assign"
+                ):
+                    # Parsing a kwarg
+                    ensure(dyn_kwargs is None)
+                    key = self.stream.current.value
+                    self.stream.skip(2)
+                    value = self.parse_expression()
+                    kwargs.append(nodes.Keyword(key, value, lineno=value.lineno))
+                else:
+                    # Parsing an arg
+                    ensure(dyn_args is None and dyn_kwargs is None and not kwargs)
+                    args.append(self.parse_expression())
+
+            require_comma = True
+
+        self.stream.expect("rparen")
+        return args, kwargs, dyn_args, dyn_kwargs
+
+    def parse_call(self, node: nodes.Expr) -> nodes.Call:
+        # The lparen will be expected in parse_call_args, but the lineno
+        # needs to be recorded before the stream is advanced.
+        token = self.stream.current
+        args, kwargs, dyn_args, dyn_kwargs = self.parse_call_args()
+        return nodes.Call(node, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno)
+
+    def parse_filter(
+        self, node: t.Optional[nodes.Expr], start_inline: bool = False
+    ) -> t.Optional[nodes.Expr]:
+        while self.stream.current.type == "pipe" or start_inline:
+            if not start_inline:
+                next(self.stream)
+            token = self.stream.expect("name")
+            name = token.value
+            while self.stream.current.type == "dot":
+                next(self.stream)
+                name += "." + self.stream.expect("name").value
+            if self.stream.current.type == "lparen":
+                args, kwargs, dyn_args, dyn_kwargs = self.parse_call_args()
+            else:
+                args = []
+                kwargs = []
+                dyn_args = dyn_kwargs = None
+            node = nodes.Filter(
+                node, name, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno
+            )
+            start_inline = False
+        return node
+
+    def parse_test(self, node: nodes.Expr) -> nodes.Expr:
+        token = next(self.stream)
+        if self.stream.current.test("name:not"):
+            next(self.stream)
+            negated = True
+        else:
+            negated = False
+        name = self.stream.expect("name").value
+        while self.stream.current.type == "dot":
+            next(self.stream)
+            name += "." + self.stream.expect("name").value
+        dyn_args = dyn_kwargs = None
+        kwargs = []
+        if self.stream.current.type == "lparen":
+            args, kwargs, dyn_args, dyn_kwargs = self.parse_call_args()
+        elif self.stream.current.type in {
+            "name",
+            "string",
+            "integer",
+            "float",
+            "lparen",
+            "lbracket",
+            "lbrace",
+        } and not self.stream.current.test_any("name:else", "name:or", "name:and"):
+            if self.stream.current.test("name:is"):
+                self.fail("You cannot chain multiple tests with is")
+            arg_node = self.parse_primary()
+            arg_node = self.parse_postfix(arg_node)
+            args = [arg_node]
+        else:
+            args = []
+        node = nodes.Test(
+            node, name, args, kwargs, dyn_args, dyn_kwargs, lineno=token.lineno
+        )
+        if negated:
+            node = nodes.Not(node, lineno=token.lineno)
+        return node
+
+    def subparse(
+        self, end_tokens: t.Optional[t.Tuple[str, ...]] = None
+    ) -> t.List[nodes.Node]:
+        body: t.List[nodes.Node] = []
+        data_buffer: t.List[nodes.Node] = []
+        add_data = data_buffer.append
+
+        if end_tokens is not None:
+            self._end_token_stack.append(end_tokens)
+
+        def flush_data() -> None:
+            if data_buffer:
+                lineno = data_buffer[0].lineno
+                body.append(nodes.Output(data_buffer[:], lineno=lineno))
+                del data_buffer[:]
+
+        try:
+            while self.stream:
+                token = self.stream.current
+                if token.type == "data":
+                    if token.value:
+                        add_data(nodes.TemplateData(token.value, lineno=token.lineno))
+                    next(self.stream)
+                elif token.type == "variable_begin":
+                    next(self.stream)
+                    add_data(self.parse_tuple(with_condexpr=True))
+                    self.stream.expect("variable_end")
+                elif token.type == "block_begin":
+                    flush_data()
+                    next(self.stream)
+                    if end_tokens is not None and self.stream.current.test_any(
+                        *end_tokens
+                    ):
+                        return body
+                    rv = self.parse_statement()
+                    if isinstance(rv, list):
+                        body.extend(rv)
+                    else:
+                        body.append(rv)
+                    self.stream.expect("block_end")
+                else:
+                    raise AssertionError("internal parsing error")
+
+            flush_data()
+        finally:
+            if end_tokens is not None:
+                self._end_token_stack.pop()
+        return body
+
+    def parse(self) -> nodes.Template:
+        """Parse the whole template into a `Template` node."""
+        result = nodes.Template(self.subparse(), lineno=1)
+        result.set_environment(self.environment)
+        return result
diff --git a/venv/lib/python3.9/site-packages/jinja2/py.typed b/venv/lib/python3.9/site-packages/jinja2/py.typed
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/py.typed
diff --git a/venv/lib/python3.9/site-packages/jinja2/runtime.py b/venv/lib/python3.9/site-packages/jinja2/runtime.py
new file mode 100644
index 0000000..985842b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/runtime.py
@@ -0,0 +1,1053 @@
+"""The runtime functions and state used by compiled templates."""
+import functools
+import sys
+import typing as t
+from collections import abc
+from itertools import chain
+
+from markupsafe import escape  # noqa: F401
+from markupsafe import Markup
+from markupsafe import soft_str
+
+from .async_utils import auto_aiter
+from .async_utils import auto_await  # noqa: F401
+from .exceptions import TemplateNotFound  # noqa: F401
+from .exceptions import TemplateRuntimeError  # noqa: F401
+from .exceptions import UndefinedError
+from .nodes import EvalContext
+from .utils import _PassArg
+from .utils import concat
+from .utils import internalcode
+from .utils import missing
+from .utils import Namespace  # noqa: F401
+from .utils import object_type_repr
+from .utils import pass_eval_context
+
+V = t.TypeVar("V")
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+if t.TYPE_CHECKING:
+    import logging
+    import typing_extensions as te
+    from .environment import Environment
+
+    class LoopRenderFunc(te.Protocol):
+        def __call__(
+            self,
+            reciter: t.Iterable[V],
+            loop_render_func: "LoopRenderFunc",
+            depth: int = 0,
+        ) -> str:
+            ...
+
+
+# these variables are exported to the template runtime
+exported = [
+    "LoopContext",
+    "TemplateReference",
+    "Macro",
+    "Markup",
+    "TemplateRuntimeError",
+    "missing",
+    "escape",
+    "markup_join",
+    "str_join",
+    "identity",
+    "TemplateNotFound",
+    "Namespace",
+    "Undefined",
+    "internalcode",
+]
+async_exported = [
+    "AsyncLoopContext",
+    "auto_aiter",
+    "auto_await",
+]
+
+
+def identity(x: V) -> V:
+    """Returns its argument. Useful for certain things in the
+    environment.
+    """
+    return x
+
+
+def markup_join(seq: t.Iterable[t.Any]) -> str:
+    """Concatenation that escapes if necessary and converts to string."""
+    buf = []
+    iterator = map(soft_str, seq)
+    for arg in iterator:
+        buf.append(arg)
+        if hasattr(arg, "__html__"):
+            return Markup("").join(chain(buf, iterator))
+    return concat(buf)
+
+
+def str_join(seq: t.Iterable[t.Any]) -> str:
+    """Simple args to string conversion and concatenation."""
+    return concat(map(str, seq))
+
+
+def new_context(
+    environment: "Environment",
+    template_name: t.Optional[str],
+    blocks: t.Dict[str, t.Callable[["Context"], t.Iterator[str]]],
+    vars: t.Optional[t.Dict[str, t.Any]] = None,
+    shared: bool = False,
+    globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    locals: t.Optional[t.Mapping[str, t.Any]] = None,
+) -> "Context":
+    """Internal helper for context creation."""
+    if vars is None:
+        vars = {}
+    if shared:
+        parent = vars
+    else:
+        parent = dict(globals or (), **vars)
+    if locals:
+        # if the parent is shared a copy should be created because
+        # we don't want to modify the dict passed
+        if shared:
+            parent = dict(parent)
+        for key, value in locals.items():
+            if value is not missing:
+                parent[key] = value
+    return environment.context_class(
+        environment, parent, template_name, blocks, globals=globals
+    )
+
+
+class TemplateReference:
+    """The `self` in templates."""
+
+    def __init__(self, context: "Context") -> None:
+        self.__context = context
+
+    def __getitem__(self, name: str) -> t.Any:
+        blocks = self.__context.blocks[name]
+        return BlockReference(name, self.__context, blocks, 0)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.__context.name!r}>"
+
+
+def _dict_method_all(dict_method: F) -> F:
+    @functools.wraps(dict_method)
+    def f_all(self: "Context") -> t.Any:
+        return dict_method(self.get_all())
+
+    return t.cast(F, f_all)
+
+
+@abc.Mapping.register
+class Context:
+    """The template context holds the variables of a template.  It stores the
+    values passed to the template and also the names the template exports.
+    Creating instances is neither supported nor useful as it's created
+    automatically at various stages of the template evaluation and should not
+    be created by hand.
+
+    The context is immutable.  Modifications on :attr:`parent` **must not**
+    happen and modifications on :attr:`vars` are allowed from generated
+    template code only.  Template filters and global functions marked as
+    :func:`pass_context` get the active context passed as first argument
+    and are allowed to access the context read-only.
+
+    The template context supports read only dict operations (`get`,
+    `keys`, `values`, `items`, `iterkeys`, `itervalues`, `iteritems`,
+    `__getitem__`, `__contains__`).  Additionally there is a :meth:`resolve`
+    method that doesn't fail with a `KeyError` but returns an
+    :class:`Undefined` object for missing variables.
+    """
+
+    def __init__(
+        self,
+        environment: "Environment",
+        parent: t.Dict[str, t.Any],
+        name: t.Optional[str],
+        blocks: t.Dict[str, t.Callable[["Context"], t.Iterator[str]]],
+        globals: t.Optional[t.MutableMapping[str, t.Any]] = None,
+    ):
+        self.parent = parent
+        self.vars: t.Dict[str, t.Any] = {}
+        self.environment: "Environment" = environment
+        self.eval_ctx = EvalContext(self.environment, name)
+        self.exported_vars: t.Set[str] = set()
+        self.name = name
+        self.globals_keys = set() if globals is None else set(globals)
+
+        # create the initial mapping of blocks.  Whenever template inheritance
+        # takes place the runtime will update this mapping with the new blocks
+        # from the template.
+        self.blocks = {k: [v] for k, v in blocks.items()}
+
+    def super(
+        self, name: str, current: t.Callable[["Context"], t.Iterator[str]]
+    ) -> t.Union["BlockReference", "Undefined"]:
+        """Render a parent block."""
+        try:
+            blocks = self.blocks[name]
+            index = blocks.index(current) + 1
+            blocks[index]
+        except LookupError:
+            return self.environment.undefined(
+                f"there is no parent block called {name!r}.", name="super"
+            )
+        return BlockReference(name, self, blocks, index)
+
+    def get(self, key: str, default: t.Any = None) -> t.Any:
+        """Look up a variable by name, or return a default if the key is
+        not found.
+
+        :param key: The variable name to look up.
+        :param default: The value to return if the key is not found.
+        """
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def resolve(self, key: str) -> t.Union[t.Any, "Undefined"]:
+        """Look up a variable by name, or return an :class:`Undefined`
+        object if the key is not found.
+
+        If you need to add custom behavior, override
+        :meth:`resolve_or_missing`, not this method. The various lookup
+        functions use that method, not this one.
+
+        :param key: The variable name to look up.
+        """
+        rv = self.resolve_or_missing(key)
+
+        if rv is missing:
+            return self.environment.undefined(name=key)
+
+        return rv
+
+    def resolve_or_missing(self, key: str) -> t.Any:
+        """Look up a variable by name, or return a ``missing`` sentinel
+        if the key is not found.
+
+        Override this method to add custom lookup behavior.
+        :meth:`resolve`, :meth:`get`, and :meth:`__getitem__` use this
+        method. Don't call this method directly.
+
+        :param key: The variable name to look up.
+        """
+        if key in self.vars:
+            return self.vars[key]
+
+        if key in self.parent:
+            return self.parent[key]
+
+        return missing
+
+    def get_exported(self) -> t.Dict[str, t.Any]:
+        """Get a new dict with the exported variables."""
+        return {k: self.vars[k] for k in self.exported_vars}
+
+    def get_all(self) -> t.Dict[str, t.Any]:
+        """Return the complete context as dict including the exported
+        variables.  For optimizations reasons this might not return an
+        actual copy so be careful with using it.
+        """
+        if not self.vars:
+            return self.parent
+        if not self.parent:
+            return self.vars
+        return dict(self.parent, **self.vars)
+
+    @internalcode
+    def call(
+        __self, __obj: t.Callable, *args: t.Any, **kwargs: t.Any  # noqa: B902
+    ) -> t.Union[t.Any, "Undefined"]:
+        """Call the callable with the arguments and keyword arguments
+        provided but inject the active context or environment as first
+        argument if the callable has :func:`pass_context` or
+        :func:`pass_environment`.
+        """
+        if __debug__:
+            __traceback_hide__ = True  # noqa
+
+        # Allow callable classes to take a context
+        if (
+            hasattr(__obj, "__call__")  # noqa: B004
+            and _PassArg.from_obj(__obj.__call__) is not None  # type: ignore
+        ):
+            __obj = __obj.__call__  # type: ignore
+
+        pass_arg = _PassArg.from_obj(__obj)
+
+        if pass_arg is _PassArg.context:
+            # the active context should have access to variables set in
+            # loops and blocks without mutating the context itself
+            if kwargs.get("_loop_vars"):
+                __self = __self.derived(kwargs["_loop_vars"])
+            if kwargs.get("_block_vars"):
+                __self = __self.derived(kwargs["_block_vars"])
+            args = (__self,) + args
+        elif pass_arg is _PassArg.eval_context:
+            args = (__self.eval_ctx,) + args
+        elif pass_arg is _PassArg.environment:
+            args = (__self.environment,) + args
+
+        kwargs.pop("_block_vars", None)
+        kwargs.pop("_loop_vars", None)
+
+        try:
+            return __obj(*args, **kwargs)
+        except StopIteration:
+            return __self.environment.undefined(
+                "value was undefined because a callable raised a"
+                " StopIteration exception"
+            )
+
+    def derived(self, locals: t.Optional[t.Dict[str, t.Any]] = None) -> "Context":
+        """Internal helper function to create a derived context.  This is
+        used in situations where the system needs a new context in the same
+        template that is independent.
+        """
+        context = new_context(
+            self.environment, self.name, {}, self.get_all(), True, None, locals
+        )
+        context.eval_ctx = self.eval_ctx
+        context.blocks.update((k, list(v)) for k, v in self.blocks.items())
+        return context
+
+    keys = _dict_method_all(dict.keys)
+    values = _dict_method_all(dict.values)
+    items = _dict_method_all(dict.items)
+
+    def __contains__(self, name: str) -> bool:
+        return name in self.vars or name in self.parent
+
+    def __getitem__(self, key: str) -> t.Any:
+        """Look up a variable by name with ``[]`` syntax, or raise a
+        ``KeyError`` if the key is not found.
+        """
+        item = self.resolve_or_missing(key)
+
+        if item is missing:
+            raise KeyError(key)
+
+        return item
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.get_all()!r} of {self.name!r}>"
+
+
+class BlockReference:
+    """One block on a template reference."""
+
+    def __init__(
+        self,
+        name: str,
+        context: "Context",
+        stack: t.List[t.Callable[["Context"], t.Iterator[str]]],
+        depth: int,
+    ) -> None:
+        self.name = name
+        self._context = context
+        self._stack = stack
+        self._depth = depth
+
+    @property
+    def super(self) -> t.Union["BlockReference", "Undefined"]:
+        """Super the block."""
+        if self._depth + 1 >= len(self._stack):
+            return self._context.environment.undefined(
+                f"there is no parent block called {self.name!r}.", name="super"
+            )
+        return BlockReference(self.name, self._context, self._stack, self._depth + 1)
+
+    @internalcode
+    async def _async_call(self) -> str:
+        rv = concat(
+            [x async for x in self._stack[self._depth](self._context)]  # type: ignore
+        )
+
+        if self._context.eval_ctx.autoescape:
+            return Markup(rv)
+
+        return rv
+
+    @internalcode
+    def __call__(self) -> str:
+        if self._context.environment.is_async:
+            return self._async_call()  # type: ignore
+
+        rv = concat(self._stack[self._depth](self._context))
+
+        if self._context.eval_ctx.autoescape:
+            return Markup(rv)
+
+        return rv
+
+
+class LoopContext:
+    """A wrapper iterable for dynamic ``for`` loops, with information
+    about the loop and iteration.
+    """
+
+    #: Current iteration of the loop, starting at 0.
+    index0 = -1
+
+    _length: t.Optional[int] = None
+    _after: t.Any = missing
+    _current: t.Any = missing
+    _before: t.Any = missing
+    _last_changed_value: t.Any = missing
+
+    def __init__(
+        self,
+        iterable: t.Iterable[V],
+        undefined: t.Type["Undefined"],
+        recurse: t.Optional["LoopRenderFunc"] = None,
+        depth0: int = 0,
+    ) -> None:
+        """
+        :param iterable: Iterable to wrap.
+        :param undefined: :class:`Undefined` class to use for next and
+            previous items.
+        :param recurse: The function to render the loop body when the
+            loop is marked recursive.
+        :param depth0: Incremented when looping recursively.
+        """
+        self._iterable = iterable
+        self._iterator = self._to_iterator(iterable)
+        self._undefined = undefined
+        self._recurse = recurse
+        #: How many levels deep a recursive loop currently is, starting at 0.
+        self.depth0 = depth0
+
+    @staticmethod
+    def _to_iterator(iterable: t.Iterable[V]) -> t.Iterator[V]:
+        return iter(iterable)
+
+    @property
+    def length(self) -> int:
+        """Length of the iterable.
+
+        If the iterable is a generator or otherwise does not have a
+        size, it is eagerly evaluated to get a size.
+        """
+        if self._length is not None:
+            return self._length
+
+        try:
+            self._length = len(self._iterable)  # type: ignore
+        except TypeError:
+            iterable = list(self._iterator)
+            self._iterator = self._to_iterator(iterable)
+            self._length = len(iterable) + self.index + (self._after is not missing)
+
+        return self._length
+
+    def __len__(self) -> int:
+        return self.length
+
+    @property
+    def depth(self) -> int:
+        """How many levels deep a recursive loop currently is, starting at 1."""
+        return self.depth0 + 1
+
+    @property
+    def index(self) -> int:
+        """Current iteration of the loop, starting at 1."""
+        return self.index0 + 1
+
+    @property
+    def revindex0(self) -> int:
+        """Number of iterations from the end of the loop, ending at 0.
+
+        Requires calculating :attr:`length`.
+        """
+        return self.length - self.index
+
+    @property
+    def revindex(self) -> int:
+        """Number of iterations from the end of the loop, ending at 1.
+
+        Requires calculating :attr:`length`.
+        """
+        return self.length - self.index0
+
+    @property
+    def first(self) -> bool:
+        """Whether this is the first iteration of the loop."""
+        return self.index0 == 0
+
+    def _peek_next(self) -> t.Any:
+        """Return the next element in the iterable, or :data:`missing`
+        if the iterable is exhausted. Only peeks one item ahead, caching
+        the result in :attr:`_last` for use in subsequent checks. The
+        cache is reset when :meth:`__next__` is called.
+        """
+        if self._after is not missing:
+            return self._after
+
+        self._after = next(self._iterator, missing)
+        return self._after
+
+    @property
+    def last(self) -> bool:
+        """Whether this is the last iteration of the loop.
+
+        Causes the iterable to advance early. See
+        :func:`itertools.groupby` for issues this can cause.
+        The :func:`groupby` filter avoids that issue.
+        """
+        return self._peek_next() is missing
+
+    @property
+    def previtem(self) -> t.Union[t.Any, "Undefined"]:
+        """The item in the previous iteration. Undefined during the
+        first iteration.
+        """
+        if self.first:
+            return self._undefined("there is no previous item")
+
+        return self._before
+
+    @property
+    def nextitem(self) -> t.Union[t.Any, "Undefined"]:
+        """The item in the next iteration. Undefined during the last
+        iteration.
+
+        Causes the iterable to advance early. See
+        :func:`itertools.groupby` for issues this can cause.
+        The :func:`jinja-filters.groupby` filter avoids that issue.
+        """
+        rv = self._peek_next()
+
+        if rv is missing:
+            return self._undefined("there is no next item")
+
+        return rv
+
+    def cycle(self, *args: V) -> V:
+        """Return a value from the given args, cycling through based on
+        the current :attr:`index0`.
+
+        :param args: One or more values to cycle through.
+        """
+        if not args:
+            raise TypeError("no items for cycling given")
+
+        return args[self.index0 % len(args)]
+
+    def changed(self, *value: t.Any) -> bool:
+        """Return ``True`` if previously called with a different value
+        (including when called for the first time).
+
+        :param value: One or more values to compare to the last call.
+        """
+        if self._last_changed_value != value:
+            self._last_changed_value = value
+            return True
+
+        return False
+
+    def __iter__(self) -> "LoopContext":
+        return self
+
+    def __next__(self) -> t.Tuple[t.Any, "LoopContext"]:
+        if self._after is not missing:
+            rv = self._after
+            self._after = missing
+        else:
+            rv = next(self._iterator)
+
+        self.index0 += 1
+        self._before = self._current
+        self._current = rv
+        return rv, self
+
+    @internalcode
+    def __call__(self, iterable: t.Iterable[V]) -> str:
+        """When iterating over nested data, render the body of the loop
+        recursively with the given inner iterable data.
+
+        The loop must have the ``recursive`` marker for this to work.
+        """
+        if self._recurse is None:
+            raise TypeError(
+                "The loop must have the 'recursive' marker to be called recursively."
+            )
+
+        return self._recurse(iterable, self._recurse, depth=self.depth)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self.index}/{self.length}>"
+
+
+class AsyncLoopContext(LoopContext):
+    _iterator: t.AsyncIterator[t.Any]  # type: ignore
+
+    @staticmethod
+    def _to_iterator(  # type: ignore
+        iterable: t.Union[t.Iterable[V], t.AsyncIterable[V]]
+    ) -> t.AsyncIterator[V]:
+        return auto_aiter(iterable)
+
+    @property
+    async def length(self) -> int:  # type: ignore
+        if self._length is not None:
+            return self._length
+
+        try:
+            self._length = len(self._iterable)  # type: ignore
+        except TypeError:
+            iterable = [x async for x in self._iterator]
+            self._iterator = self._to_iterator(iterable)
+            self._length = len(iterable) + self.index + (self._after is not missing)
+
+        return self._length
+
+    @property
+    async def revindex0(self) -> int:  # type: ignore
+        return await self.length - self.index
+
+    @property
+    async def revindex(self) -> int:  # type: ignore
+        return await self.length - self.index0
+
+    async def _peek_next(self) -> t.Any:
+        if self._after is not missing:
+            return self._after
+
+        try:
+            self._after = await self._iterator.__anext__()
+        except StopAsyncIteration:
+            self._after = missing
+
+        return self._after
+
+    @property
+    async def last(self) -> bool:  # type: ignore
+        return await self._peek_next() is missing
+
+    @property
+    async def nextitem(self) -> t.Union[t.Any, "Undefined"]:
+        rv = await self._peek_next()
+
+        if rv is missing:
+            return self._undefined("there is no next item")
+
+        return rv
+
+    def __aiter__(self) -> "AsyncLoopContext":
+        return self
+
+    async def __anext__(self) -> t.Tuple[t.Any, "AsyncLoopContext"]:
+        if self._after is not missing:
+            rv = self._after
+            self._after = missing
+        else:
+            rv = await self._iterator.__anext__()
+
+        self.index0 += 1
+        self._before = self._current
+        self._current = rv
+        return rv, self
+
+
+class Macro:
+    """Wraps a macro function."""
+
+    def __init__(
+        self,
+        environment: "Environment",
+        func: t.Callable[..., str],
+        name: str,
+        arguments: t.List[str],
+        catch_kwargs: bool,
+        catch_varargs: bool,
+        caller: bool,
+        default_autoescape: t.Optional[bool] = None,
+    ):
+        self._environment = environment
+        self._func = func
+        self._argument_count = len(arguments)
+        self.name = name
+        self.arguments = arguments
+        self.catch_kwargs = catch_kwargs
+        self.catch_varargs = catch_varargs
+        self.caller = caller
+        self.explicit_caller = "caller" in arguments
+
+        if default_autoescape is None:
+            if callable(environment.autoescape):
+                default_autoescape = environment.autoescape(None)
+            else:
+                default_autoescape = environment.autoescape
+
+        self._default_autoescape = default_autoescape
+
+    @internalcode
+    @pass_eval_context
+    def __call__(self, *args: t.Any, **kwargs: t.Any) -> str:
+        # This requires a bit of explanation,  In the past we used to
+        # decide largely based on compile-time information if a macro is
+        # safe or unsafe.  While there was a volatile mode it was largely
+        # unused for deciding on escaping.  This turns out to be
+        # problematic for macros because whether a macro is safe depends not
+        # on the escape mode when it was defined, but rather when it was used.
+        #
+        # Because however we export macros from the module system and
+        # there are historic callers that do not pass an eval context (and
+        # will continue to not pass one), we need to perform an instance
+        # check here.
+        #
+        # This is considered safe because an eval context is not a valid
+        # argument to callables otherwise anyway.  Worst case here is
+        # that if no eval context is passed we fall back to the compile
+        # time autoescape flag.
+        if args and isinstance(args[0], EvalContext):
+            autoescape = args[0].autoescape
+            args = args[1:]
+        else:
+            autoescape = self._default_autoescape
+
+        # try to consume the positional arguments
+        arguments = list(args[: self._argument_count])
+        off = len(arguments)
+
+        # For information why this is necessary refer to the handling
+        # of caller in the `macro_body` handler in the compiler.
+        found_caller = False
+
+        # if the number of arguments consumed is not the number of
+        # arguments expected we start filling in keyword arguments
+        # and defaults.
+        if off != self._argument_count:
+            for name in self.arguments[len(arguments) :]:
+                try:
+                    value = kwargs.pop(name)
+                except KeyError:
+                    value = missing
+                if name == "caller":
+                    found_caller = True
+                arguments.append(value)
+        else:
+            found_caller = self.explicit_caller
+
+        # it's important that the order of these arguments does not change
+        # if not also changed in the compiler's `function_scoping` method.
+        # the order is caller, keyword arguments, positional arguments!
+        if self.caller and not found_caller:
+            caller = kwargs.pop("caller", None)
+            if caller is None:
+                caller = self._environment.undefined("No caller defined", name="caller")
+            arguments.append(caller)
+
+        if self.catch_kwargs:
+            arguments.append(kwargs)
+        elif kwargs:
+            if "caller" in kwargs:
+                raise TypeError(
+                    f"macro {self.name!r} was invoked with two values for the special"
+                    " caller argument. This is most likely a bug."
+                )
+            raise TypeError(
+                f"macro {self.name!r} takes no keyword argument {next(iter(kwargs))!r}"
+            )
+        if self.catch_varargs:
+            arguments.append(args[self._argument_count :])
+        elif len(args) > self._argument_count:
+            raise TypeError(
+                f"macro {self.name!r} takes not more than"
+                f" {len(self.arguments)} argument(s)"
+            )
+
+        return self._invoke(arguments, autoescape)
+
+    async def _async_invoke(self, arguments: t.List[t.Any], autoescape: bool) -> str:
+        rv = await self._func(*arguments)  # type: ignore
+
+        if autoescape:
+            return Markup(rv)
+
+        return rv  # type: ignore
+
+    def _invoke(self, arguments: t.List[t.Any], autoescape: bool) -> str:
+        if self._environment.is_async:
+            return self._async_invoke(arguments, autoescape)  # type: ignore
+
+        rv = self._func(*arguments)
+
+        if autoescape:
+            rv = Markup(rv)
+
+        return rv
+
+    def __repr__(self) -> str:
+        name = "anonymous" if self.name is None else repr(self.name)
+        return f"<{type(self).__name__} {name}>"
+
+
+class Undefined:
+    """The default undefined type.  This undefined type can be printed and
+    iterated over, but every other access will raise an :exc:`UndefinedError`:
+
+    >>> foo = Undefined(name='foo')
+    >>> str(foo)
+    ''
+    >>> not foo
+    True
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = (
+        "_undefined_hint",
+        "_undefined_obj",
+        "_undefined_name",
+        "_undefined_exception",
+    )
+
+    def __init__(
+        self,
+        hint: t.Optional[str] = None,
+        obj: t.Any = missing,
+        name: t.Optional[str] = None,
+        exc: t.Type[TemplateRuntimeError] = UndefinedError,
+    ) -> None:
+        self._undefined_hint = hint
+        self._undefined_obj = obj
+        self._undefined_name = name
+        self._undefined_exception = exc
+
+    @property
+    def _undefined_message(self) -> str:
+        """Build a message about the undefined value based on how it was
+        accessed.
+        """
+        if self._undefined_hint:
+            return self._undefined_hint
+
+        if self._undefined_obj is missing:
+            return f"{self._undefined_name!r} is undefined"
+
+        if not isinstance(self._undefined_name, str):
+            return (
+                f"{object_type_repr(self._undefined_obj)} has no"
+                f" element {self._undefined_name!r}"
+            )
+
+        return (
+            f"{object_type_repr(self._undefined_obj)!r} has no"
+            f" attribute {self._undefined_name!r}"
+        )
+
+    @internalcode
+    def _fail_with_undefined_error(
+        self, *args: t.Any, **kwargs: t.Any
+    ) -> "te.NoReturn":
+        """Raise an :exc:`UndefinedError` when operations are performed
+        on the undefined value.
+        """
+        raise self._undefined_exception(self._undefined_message)
+
+    @internalcode
+    def __getattr__(self, name: str) -> t.Any:
+        if name[:2] == "__":
+            raise AttributeError(name)
+
+        return self._fail_with_undefined_error()
+
+    __add__ = __radd__ = __sub__ = __rsub__ = _fail_with_undefined_error
+    __mul__ = __rmul__ = __div__ = __rdiv__ = _fail_with_undefined_error
+    __truediv__ = __rtruediv__ = _fail_with_undefined_error
+    __floordiv__ = __rfloordiv__ = _fail_with_undefined_error
+    __mod__ = __rmod__ = _fail_with_undefined_error
+    __pos__ = __neg__ = _fail_with_undefined_error
+    __call__ = __getitem__ = _fail_with_undefined_error
+    __lt__ = __le__ = __gt__ = __ge__ = _fail_with_undefined_error
+    __int__ = __float__ = __complex__ = _fail_with_undefined_error
+    __pow__ = __rpow__ = _fail_with_undefined_error
+
+    def __eq__(self, other: t.Any) -> bool:
+        return type(self) is type(other)
+
+    def __ne__(self, other: t.Any) -> bool:
+        return not self.__eq__(other)
+
+    def __hash__(self) -> int:
+        return id(type(self))
+
+    def __str__(self) -> str:
+        return ""
+
+    def __len__(self) -> int:
+        return 0
+
+    def __iter__(self) -> t.Iterator[t.Any]:
+        yield from ()
+
+    async def __aiter__(self) -> t.AsyncIterator[t.Any]:
+        for _ in ():
+            yield
+
+    def __bool__(self) -> bool:
+        return False
+
+    def __repr__(self) -> str:
+        return "Undefined"
+
+
+def make_logging_undefined(
+    logger: t.Optional["logging.Logger"] = None, base: t.Type[Undefined] = Undefined
+) -> t.Type[Undefined]:
+    """Given a logger object this returns a new undefined class that will
+    log certain failures.  It will log iterations and printing.  If no
+    logger is given a default logger is created.
+
+    Example::
+
+        logger = logging.getLogger(__name__)
+        LoggingUndefined = make_logging_undefined(
+            logger=logger,
+            base=Undefined
+        )
+
+    .. versionadded:: 2.8
+
+    :param logger: the logger to use.  If not provided, a default logger
+                   is created.
+    :param base: the base class to add logging functionality to.  This
+                 defaults to :class:`Undefined`.
+    """
+    if logger is None:
+        import logging
+
+        logger = logging.getLogger(__name__)
+        logger.addHandler(logging.StreamHandler(sys.stderr))
+
+    def _log_message(undef: Undefined) -> None:
+        logger.warning(  # type: ignore
+            "Template variable warning: %s", undef._undefined_message
+        )
+
+    class LoggingUndefined(base):  # type: ignore
+        __slots__ = ()
+
+        def _fail_with_undefined_error(  # type: ignore
+            self, *args: t.Any, **kwargs: t.Any
+        ) -> "te.NoReturn":
+            try:
+                super()._fail_with_undefined_error(*args, **kwargs)
+            except self._undefined_exception as e:
+                logger.error("Template variable error: %s", e)  # type: ignore
+                raise e
+
+        def __str__(self) -> str:
+            _log_message(self)
+            return super().__str__()  # type: ignore
+
+        def __iter__(self) -> t.Iterator[t.Any]:
+            _log_message(self)
+            return super().__iter__()  # type: ignore
+
+        def __bool__(self) -> bool:
+            _log_message(self)
+            return super().__bool__()  # type: ignore
+
+    return LoggingUndefined
+
+
+class ChainableUndefined(Undefined):
+    """An undefined that is chainable, where both ``__getattr__`` and
+    ``__getitem__`` return itself rather than raising an
+    :exc:`UndefinedError`.
+
+    >>> foo = ChainableUndefined(name='foo')
+    >>> str(foo.bar['baz'])
+    ''
+    >>> foo.bar['baz'] + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+
+    .. versionadded:: 2.11.0
+    """
+
+    __slots__ = ()
+
+    def __html__(self) -> str:
+        return str(self)
+
+    def __getattr__(self, _: str) -> "ChainableUndefined":
+        return self
+
+    __getitem__ = __getattr__  # type: ignore
+
+
+class DebugUndefined(Undefined):
+    """An undefined that returns the debug info when printed.
+
+    >>> foo = DebugUndefined(name='foo')
+    >>> str(foo)
+    '{{ foo }}'
+    >>> not foo
+    True
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = ()
+
+    def __str__(self) -> str:
+        if self._undefined_hint:
+            message = f"undefined value printed: {self._undefined_hint}"
+
+        elif self._undefined_obj is missing:
+            message = self._undefined_name  # type: ignore
+
+        else:
+            message = (
+                f"no such element: {object_type_repr(self._undefined_obj)}"
+                f"[{self._undefined_name!r}]"
+            )
+
+        return f"{{{{ {message} }}}}"
+
+
+class StrictUndefined(Undefined):
+    """An undefined that barks on print and iteration as well as boolean
+    tests and all kinds of comparisons.  In other words: you can do nothing
+    with it except checking if it's defined using the `defined` test.
+
+    >>> foo = StrictUndefined(name='foo')
+    >>> str(foo)
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    >>> not foo
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    >>> foo + 42
+    Traceback (most recent call last):
+      ...
+    jinja2.exceptions.UndefinedError: 'foo' is undefined
+    """
+
+    __slots__ = ()
+    __iter__ = __str__ = __len__ = Undefined._fail_with_undefined_error
+    __eq__ = __ne__ = __bool__ = __hash__ = Undefined._fail_with_undefined_error
+    __contains__ = Undefined._fail_with_undefined_error
+
+
+# Remove slots attributes, after the metaclass is applied they are
+# unneeded and contain wrong data for subclasses.
+del (
+    Undefined.__slots__,
+    ChainableUndefined.__slots__,
+    DebugUndefined.__slots__,
+    StrictUndefined.__slots__,
+)
diff --git a/venv/lib/python3.9/site-packages/jinja2/sandbox.py b/venv/lib/python3.9/site-packages/jinja2/sandbox.py
new file mode 100644
index 0000000..06d7414
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/sandbox.py
@@ -0,0 +1,428 @@
+"""A sandbox layer that ensures unsafe operations cannot be performed.
+Useful when the template itself comes from an untrusted source.
+"""
+import operator
+import types
+import typing as t
+from _string import formatter_field_name_split  # type: ignore
+from collections import abc
+from collections import deque
+from string import Formatter
+
+from markupsafe import EscapeFormatter
+from markupsafe import Markup
+
+from .environment import Environment
+from .exceptions import SecurityError
+from .runtime import Context
+from .runtime import Undefined
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+#: maximum number of items a range may produce
+MAX_RANGE = 100000
+
+#: Unsafe function attributes.
+UNSAFE_FUNCTION_ATTRIBUTES: t.Set[str] = set()
+
+#: Unsafe method attributes. Function attributes are unsafe for methods too.
+UNSAFE_METHOD_ATTRIBUTES: t.Set[str] = set()
+
+#: unsafe generator attributes.
+UNSAFE_GENERATOR_ATTRIBUTES = {"gi_frame", "gi_code"}
+
+#: unsafe attributes on coroutines
+UNSAFE_COROUTINE_ATTRIBUTES = {"cr_frame", "cr_code"}
+
+#: unsafe attributes on async generators
+UNSAFE_ASYNC_GENERATOR_ATTRIBUTES = {"ag_code", "ag_frame"}
+
+_mutable_spec: t.Tuple[t.Tuple[t.Type, t.FrozenSet[str]], ...] = (
+    (
+        abc.MutableSet,
+        frozenset(
+            [
+                "add",
+                "clear",
+                "difference_update",
+                "discard",
+                "pop",
+                "remove",
+                "symmetric_difference_update",
+                "update",
+            ]
+        ),
+    ),
+    (
+        abc.MutableMapping,
+        frozenset(["clear", "pop", "popitem", "setdefault", "update"]),
+    ),
+    (
+        abc.MutableSequence,
+        frozenset(["append", "reverse", "insert", "sort", "extend", "remove"]),
+    ),
+    (
+        deque,
+        frozenset(
+            [
+                "append",
+                "appendleft",
+                "clear",
+                "extend",
+                "extendleft",
+                "pop",
+                "popleft",
+                "remove",
+                "rotate",
+            ]
+        ),
+    ),
+)
+
+
+def inspect_format_method(callable: t.Callable) -> t.Optional[str]:
+    if not isinstance(
+        callable, (types.MethodType, types.BuiltinMethodType)
+    ) or callable.__name__ not in ("format", "format_map"):
+        return None
+
+    obj = callable.__self__
+
+    if isinstance(obj, str):
+        return obj
+
+    return None
+
+
+def safe_range(*args: int) -> range:
+    """A range that can't generate ranges with a length of more than
+    MAX_RANGE items.
+    """
+    rng = range(*args)
+
+    if len(rng) > MAX_RANGE:
+        raise OverflowError(
+            "Range too big. The sandbox blocks ranges larger than"
+            f" MAX_RANGE ({MAX_RANGE})."
+        )
+
+    return rng
+
+
+def unsafe(f: F) -> F:
+    """Marks a function or method as unsafe.
+
+    .. code-block: python
+
+        @unsafe
+        def delete(self):
+            pass
+    """
+    f.unsafe_callable = True  # type: ignore
+    return f
+
+
+def is_internal_attribute(obj: t.Any, attr: str) -> bool:
+    """Test if the attribute given is an internal python attribute.  For
+    example this function returns `True` for the `func_code` attribute of
+    python objects.  This is useful if the environment method
+    :meth:`~SandboxedEnvironment.is_safe_attribute` is overridden.
+
+    >>> from jinja2.sandbox import is_internal_attribute
+    >>> is_internal_attribute(str, "mro")
+    True
+    >>> is_internal_attribute(str, "upper")
+    False
+    """
+    if isinstance(obj, types.FunctionType):
+        if attr in UNSAFE_FUNCTION_ATTRIBUTES:
+            return True
+    elif isinstance(obj, types.MethodType):
+        if attr in UNSAFE_FUNCTION_ATTRIBUTES or attr in UNSAFE_METHOD_ATTRIBUTES:
+            return True
+    elif isinstance(obj, type):
+        if attr == "mro":
+            return True
+    elif isinstance(obj, (types.CodeType, types.TracebackType, types.FrameType)):
+        return True
+    elif isinstance(obj, types.GeneratorType):
+        if attr in UNSAFE_GENERATOR_ATTRIBUTES:
+            return True
+    elif hasattr(types, "CoroutineType") and isinstance(obj, types.CoroutineType):
+        if attr in UNSAFE_COROUTINE_ATTRIBUTES:
+            return True
+    elif hasattr(types, "AsyncGeneratorType") and isinstance(
+        obj, types.AsyncGeneratorType
+    ):
+        if attr in UNSAFE_ASYNC_GENERATOR_ATTRIBUTES:
+            return True
+    return attr.startswith("__")
+
+
+def modifies_known_mutable(obj: t.Any, attr: str) -> bool:
+    """This function checks if an attribute on a builtin mutable object
+    (list, dict, set or deque) or the corresponding ABCs would modify it
+    if called.
+
+    >>> modifies_known_mutable({}, "clear")
+    True
+    >>> modifies_known_mutable({}, "keys")
+    False
+    >>> modifies_known_mutable([], "append")
+    True
+    >>> modifies_known_mutable([], "index")
+    False
+
+    If called with an unsupported object, ``False`` is returned.
+
+    >>> modifies_known_mutable("foo", "upper")
+    False
+    """
+    for typespec, unsafe in _mutable_spec:
+        if isinstance(obj, typespec):
+            return attr in unsafe
+    return False
+
+
+class SandboxedEnvironment(Environment):
+    """The sandboxed environment.  It works like the regular environment but
+    tells the compiler to generate sandboxed code.  Additionally subclasses of
+    this environment may override the methods that tell the runtime what
+    attributes or functions are safe to access.
+
+    If the template tries to access insecure code a :exc:`SecurityError` is
+    raised.  However also other exceptions may occur during the rendering so
+    the caller has to ensure that all exceptions are caught.
+    """
+
+    sandboxed = True
+
+    #: default callback table for the binary operators.  A copy of this is
+    #: available on each instance of a sandboxed environment as
+    #: :attr:`binop_table`
+    default_binop_table: t.Dict[str, t.Callable[[t.Any, t.Any], t.Any]] = {
+        "+": operator.add,
+        "-": operator.sub,
+        "*": operator.mul,
+        "/": operator.truediv,
+        "//": operator.floordiv,
+        "**": operator.pow,
+        "%": operator.mod,
+    }
+
+    #: default callback table for the unary operators.  A copy of this is
+    #: available on each instance of a sandboxed environment as
+    #: :attr:`unop_table`
+    default_unop_table: t.Dict[str, t.Callable[[t.Any], t.Any]] = {
+        "+": operator.pos,
+        "-": operator.neg,
+    }
+
+    #: a set of binary operators that should be intercepted.  Each operator
+    #: that is added to this set (empty by default) is delegated to the
+    #: :meth:`call_binop` method that will perform the operator.  The default
+    #: operator callback is specified by :attr:`binop_table`.
+    #:
+    #: The following binary operators are interceptable:
+    #: ``//``, ``%``, ``+``, ``*``, ``-``, ``/``, and ``**``
+    #:
+    #: The default operation form the operator table corresponds to the
+    #: builtin function.  Intercepted calls are always slower than the native
+    #: operator call, so make sure only to intercept the ones you are
+    #: interested in.
+    #:
+    #: .. versionadded:: 2.6
+    intercepted_binops: t.FrozenSet[str] = frozenset()
+
+    #: a set of unary operators that should be intercepted.  Each operator
+    #: that is added to this set (empty by default) is delegated to the
+    #: :meth:`call_unop` method that will perform the operator.  The default
+    #: operator callback is specified by :attr:`unop_table`.
+    #:
+    #: The following unary operators are interceptable: ``+``, ``-``
+    #:
+    #: The default operation form the operator table corresponds to the
+    #: builtin function.  Intercepted calls are always slower than the native
+    #: operator call, so make sure only to intercept the ones you are
+    #: interested in.
+    #:
+    #: .. versionadded:: 2.6
+    intercepted_unops: t.FrozenSet[str] = frozenset()
+
+    def __init__(self, *args: t.Any, **kwargs: t.Any) -> None:
+        super().__init__(*args, **kwargs)
+        self.globals["range"] = safe_range
+        self.binop_table = self.default_binop_table.copy()
+        self.unop_table = self.default_unop_table.copy()
+
+    def is_safe_attribute(self, obj: t.Any, attr: str, value: t.Any) -> bool:
+        """The sandboxed environment will call this method to check if the
+        attribute of an object is safe to access.  Per default all attributes
+        starting with an underscore are considered private as well as the
+        special attributes of internal python objects as returned by the
+        :func:`is_internal_attribute` function.
+        """
+        return not (attr.startswith("_") or is_internal_attribute(obj, attr))
+
+    def is_safe_callable(self, obj: t.Any) -> bool:
+        """Check if an object is safely callable. By default callables
+        are considered safe unless decorated with :func:`unsafe`.
+
+        This also recognizes the Django convention of setting
+        ``func.alters_data = True``.
+        """
+        return not (
+            getattr(obj, "unsafe_callable", False) or getattr(obj, "alters_data", False)
+        )
+
+    def call_binop(
+        self, context: Context, operator: str, left: t.Any, right: t.Any
+    ) -> t.Any:
+        """For intercepted binary operator calls (:meth:`intercepted_binops`)
+        this function is executed instead of the builtin operator.  This can
+        be used to fine tune the behavior of certain operators.
+
+        .. versionadded:: 2.6
+        """
+        return self.binop_table[operator](left, right)
+
+    def call_unop(self, context: Context, operator: str, arg: t.Any) -> t.Any:
+        """For intercepted unary operator calls (:meth:`intercepted_unops`)
+        this function is executed instead of the builtin operator.  This can
+        be used to fine tune the behavior of certain operators.
+
+        .. versionadded:: 2.6
+        """
+        return self.unop_table[operator](arg)
+
+    def getitem(
+        self, obj: t.Any, argument: t.Union[str, t.Any]
+    ) -> t.Union[t.Any, Undefined]:
+        """Subscribe an object from sandboxed code."""
+        try:
+            return obj[argument]
+        except (TypeError, LookupError):
+            if isinstance(argument, str):
+                try:
+                    attr = str(argument)
+                except Exception:
+                    pass
+                else:
+                    try:
+                        value = getattr(obj, attr)
+                    except AttributeError:
+                        pass
+                    else:
+                        if self.is_safe_attribute(obj, argument, value):
+                            return value
+                        return self.unsafe_undefined(obj, argument)
+        return self.undefined(obj=obj, name=argument)
+
+    def getattr(self, obj: t.Any, attribute: str) -> t.Union[t.Any, Undefined]:
+        """Subscribe an object from sandboxed code and prefer the
+        attribute.  The attribute passed *must* be a bytestring.
+        """
+        try:
+            value = getattr(obj, attribute)
+        except AttributeError:
+            try:
+                return obj[attribute]
+            except (TypeError, LookupError):
+                pass
+        else:
+            if self.is_safe_attribute(obj, attribute, value):
+                return value
+            return self.unsafe_undefined(obj, attribute)
+        return self.undefined(obj=obj, name=attribute)
+
+    def unsafe_undefined(self, obj: t.Any, attribute: str) -> Undefined:
+        """Return an undefined object for unsafe attributes."""
+        return self.undefined(
+            f"access to attribute {attribute!r} of"
+            f" {type(obj).__name__!r} object is unsafe.",
+            name=attribute,
+            obj=obj,
+            exc=SecurityError,
+        )
+
+    def format_string(
+        self,
+        s: str,
+        args: t.Tuple[t.Any, ...],
+        kwargs: t.Dict[str, t.Any],
+        format_func: t.Optional[t.Callable] = None,
+    ) -> str:
+        """If a format call is detected, then this is routed through this
+        method so that our safety sandbox can be used for it.
+        """
+        formatter: SandboxedFormatter
+        if isinstance(s, Markup):
+            formatter = SandboxedEscapeFormatter(self, escape=s.escape)
+        else:
+            formatter = SandboxedFormatter(self)
+
+        if format_func is not None and format_func.__name__ == "format_map":
+            if len(args) != 1 or kwargs:
+                raise TypeError(
+                    "format_map() takes exactly one argument"
+                    f" {len(args) + (kwargs is not None)} given"
+                )
+
+            kwargs = args[0]
+            args = ()
+
+        rv = formatter.vformat(s, args, kwargs)
+        return type(s)(rv)
+
+    def call(
+        __self,  # noqa: B902
+        __context: Context,
+        __obj: t.Any,
+        *args: t.Any,
+        **kwargs: t.Any,
+    ) -> t.Any:
+        """Call an object from sandboxed code."""
+        fmt = inspect_format_method(__obj)
+        if fmt is not None:
+            return __self.format_string(fmt, args, kwargs, __obj)
+
+        # the double prefixes are to avoid double keyword argument
+        # errors when proxying the call.
+        if not __self.is_safe_callable(__obj):
+            raise SecurityError(f"{__obj!r} is not safely callable")
+        return __context.call(__obj, *args, **kwargs)
+
+
+class ImmutableSandboxedEnvironment(SandboxedEnvironment):
+    """Works exactly like the regular `SandboxedEnvironment` but does not
+    permit modifications on the builtin mutable objects `list`, `set`, and
+    `dict` by using the :func:`modifies_known_mutable` function.
+    """
+
+    def is_safe_attribute(self, obj: t.Any, attr: str, value: t.Any) -> bool:
+        if not super().is_safe_attribute(obj, attr, value):
+            return False
+
+        return not modifies_known_mutable(obj, attr)
+
+
+class SandboxedFormatter(Formatter):
+    def __init__(self, env: Environment, **kwargs: t.Any) -> None:
+        self._env = env
+        super().__init__(**kwargs)
+
+    def get_field(
+        self, field_name: str, args: t.Sequence[t.Any], kwargs: t.Mapping[str, t.Any]
+    ) -> t.Tuple[t.Any, str]:
+        first, rest = formatter_field_name_split(field_name)
+        obj = self.get_value(first, args, kwargs)
+        for is_attr, i in rest:
+            if is_attr:
+                obj = self._env.getattr(obj, i)
+            else:
+                obj = self._env.getitem(obj, i)
+        return obj, first
+
+
+class SandboxedEscapeFormatter(SandboxedFormatter, EscapeFormatter):
+    pass
diff --git a/venv/lib/python3.9/site-packages/jinja2/tests.py b/venv/lib/python3.9/site-packages/jinja2/tests.py
new file mode 100644
index 0000000..a467cf0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/tests.py
@@ -0,0 +1,255 @@
+"""Built-in template tests used with the ``is`` operator."""
+import operator
+import typing as t
+from collections import abc
+from numbers import Number
+
+from .runtime import Undefined
+from .utils import pass_environment
+
+if t.TYPE_CHECKING:
+    from .environment import Environment
+
+
+def test_odd(value: int) -> bool:
+    """Return true if the variable is odd."""
+    return value % 2 == 1
+
+
+def test_even(value: int) -> bool:
+    """Return true if the variable is even."""
+    return value % 2 == 0
+
+
+def test_divisibleby(value: int, num: int) -> bool:
+    """Check if a variable is divisible by a number."""
+    return value % num == 0
+
+
+def test_defined(value: t.Any) -> bool:
+    """Return true if the variable is defined:
+
+    .. sourcecode:: jinja
+
+        {% if variable is defined %}
+            value of variable: {{ variable }}
+        {% else %}
+            variable is not defined
+        {% endif %}
+
+    See the :func:`default` filter for a simple way to set undefined
+    variables.
+    """
+    return not isinstance(value, Undefined)
+
+
+def test_undefined(value: t.Any) -> bool:
+    """Like :func:`defined` but the other way round."""
+    return isinstance(value, Undefined)
+
+
+@pass_environment
+def test_filter(env: "Environment", value: str) -> bool:
+    """Check if a filter exists by name. Useful if a filter may be
+    optionally available.
+
+    .. code-block:: jinja
+
+        {% if 'markdown' is filter %}
+            {{ value | markdown }}
+        {% else %}
+            {{ value }}
+        {% endif %}
+
+    .. versionadded:: 3.0
+    """
+    return value in env.filters
+
+
+@pass_environment
+def test_test(env: "Environment", value: str) -> bool:
+    """Check if a test exists by name. Useful if a test may be
+    optionally available.
+
+    .. code-block:: jinja
+
+        {% if 'loud' is test %}
+            {% if value is loud %}
+                {{ value|upper }}
+            {% else %}
+                {{ value|lower }}
+            {% endif %}
+        {% else %}
+            {{ value }}
+        {% endif %}
+
+    .. versionadded:: 3.0
+    """
+    return value in env.tests
+
+
+def test_none(value: t.Any) -> bool:
+    """Return true if the variable is none."""
+    return value is None
+
+
+def test_boolean(value: t.Any) -> bool:
+    """Return true if the object is a boolean value.
+
+    .. versionadded:: 2.11
+    """
+    return value is True or value is False
+
+
+def test_false(value: t.Any) -> bool:
+    """Return true if the object is False.
+
+    .. versionadded:: 2.11
+    """
+    return value is False
+
+
+def test_true(value: t.Any) -> bool:
+    """Return true if the object is True.
+
+    .. versionadded:: 2.11
+    """
+    return value is True
+
+
+# NOTE: The existing 'number' test matches booleans and floats
+def test_integer(value: t.Any) -> bool:
+    """Return true if the object is an integer.
+
+    .. versionadded:: 2.11
+    """
+    return isinstance(value, int) and value is not True and value is not False
+
+
+# NOTE: The existing 'number' test matches booleans and integers
+def test_float(value: t.Any) -> bool:
+    """Return true if the object is a float.
+
+    .. versionadded:: 2.11
+    """
+    return isinstance(value, float)
+
+
+def test_lower(value: str) -> bool:
+    """Return true if the variable is lowercased."""
+    return str(value).islower()
+
+
+def test_upper(value: str) -> bool:
+    """Return true if the variable is uppercased."""
+    return str(value).isupper()
+
+
+def test_string(value: t.Any) -> bool:
+    """Return true if the object is a string."""
+    return isinstance(value, str)
+
+
+def test_mapping(value: t.Any) -> bool:
+    """Return true if the object is a mapping (dict etc.).
+
+    .. versionadded:: 2.6
+    """
+    return isinstance(value, abc.Mapping)
+
+
+def test_number(value: t.Any) -> bool:
+    """Return true if the variable is a number."""
+    return isinstance(value, Number)
+
+
+def test_sequence(value: t.Any) -> bool:
+    """Return true if the variable is a sequence. Sequences are variables
+    that are iterable.
+    """
+    try:
+        len(value)
+        value.__getitem__
+    except Exception:
+        return False
+
+    return True
+
+
+def test_sameas(value: t.Any, other: t.Any) -> bool:
+    """Check if an object points to the same memory address than another
+    object:
+
+    .. sourcecode:: jinja
+
+        {% if foo.attribute is sameas false %}
+            the foo attribute really is the `False` singleton
+        {% endif %}
+    """
+    return value is other
+
+
+def test_iterable(value: t.Any) -> bool:
+    """Check if it's possible to iterate over an object."""
+    try:
+        iter(value)
+    except TypeError:
+        return False
+
+    return True
+
+
+def test_escaped(value: t.Any) -> bool:
+    """Check if the value is escaped."""
+    return hasattr(value, "__html__")
+
+
+def test_in(value: t.Any, seq: t.Container) -> bool:
+    """Check if value is in seq.
+
+    .. versionadded:: 2.10
+    """
+    return value in seq
+
+
+TESTS = {
+    "odd": test_odd,
+    "even": test_even,
+    "divisibleby": test_divisibleby,
+    "defined": test_defined,
+    "undefined": test_undefined,
+    "filter": test_filter,
+    "test": test_test,
+    "none": test_none,
+    "boolean": test_boolean,
+    "false": test_false,
+    "true": test_true,
+    "integer": test_integer,
+    "float": test_float,
+    "lower": test_lower,
+    "upper": test_upper,
+    "string": test_string,
+    "mapping": test_mapping,
+    "number": test_number,
+    "sequence": test_sequence,
+    "iterable": test_iterable,
+    "callable": callable,
+    "sameas": test_sameas,
+    "escaped": test_escaped,
+    "in": test_in,
+    "==": operator.eq,
+    "eq": operator.eq,
+    "equalto": operator.eq,
+    "!=": operator.ne,
+    "ne": operator.ne,
+    ">": operator.gt,
+    "gt": operator.gt,
+    "greaterthan": operator.gt,
+    "ge": operator.ge,
+    ">=": operator.ge,
+    "<": operator.lt,
+    "lt": operator.lt,
+    "lessthan": operator.lt,
+    "<=": operator.le,
+    "le": operator.le,
+}
diff --git a/venv/lib/python3.9/site-packages/jinja2/utils.py b/venv/lib/python3.9/site-packages/jinja2/utils.py
new file mode 100644
index 0000000..9b5f5a5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/utils.py
@@ -0,0 +1,755 @@
+import enum
+import json
+import os
+import re
+import typing as t
+from collections import abc
+from collections import deque
+from random import choice
+from random import randrange
+from threading import Lock
+from types import CodeType
+from urllib.parse import quote_from_bytes
+
+import markupsafe
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
+F = t.TypeVar("F", bound=t.Callable[..., t.Any])
+
+# special singleton representing missing values for the runtime
+missing: t.Any = type("MissingType", (), {"__repr__": lambda x: "missing"})()
+
+internal_code: t.MutableSet[CodeType] = set()
+
+concat = "".join
+
+
+def pass_context(f: F) -> F:
+    """Pass the :class:`~jinja2.runtime.Context` as the first argument
+    to the decorated function when called while rendering a template.
+
+    Can be used on functions, filters, and tests.
+
+    If only ``Context.eval_context`` is needed, use
+    :func:`pass_eval_context`. If only ``Context.environment`` is
+    needed, use :func:`pass_environment`.
+
+    .. versionadded:: 3.0.0
+        Replaces ``contextfunction`` and ``contextfilter``.
+    """
+    f.jinja_pass_arg = _PassArg.context  # type: ignore
+    return f
+
+
+def pass_eval_context(f: F) -> F:
+    """Pass the :class:`~jinja2.nodes.EvalContext` as the first argument
+    to the decorated function when called while rendering a template.
+    See :ref:`eval-context`.
+
+    Can be used on functions, filters, and tests.
+
+    If only ``EvalContext.environment`` is needed, use
+    :func:`pass_environment`.
+
+    .. versionadded:: 3.0.0
+        Replaces ``evalcontextfunction`` and ``evalcontextfilter``.
+    """
+    f.jinja_pass_arg = _PassArg.eval_context  # type: ignore
+    return f
+
+
+def pass_environment(f: F) -> F:
+    """Pass the :class:`~jinja2.Environment` as the first argument to
+    the decorated function when called while rendering a template.
+
+    Can be used on functions, filters, and tests.
+
+    .. versionadded:: 3.0.0
+        Replaces ``environmentfunction`` and ``environmentfilter``.
+    """
+    f.jinja_pass_arg = _PassArg.environment  # type: ignore
+    return f
+
+
+class _PassArg(enum.Enum):
+    context = enum.auto()
+    eval_context = enum.auto()
+    environment = enum.auto()
+
+    @classmethod
+    def from_obj(cls, obj: F) -> t.Optional["_PassArg"]:
+        if hasattr(obj, "jinja_pass_arg"):
+            return obj.jinja_pass_arg  # type: ignore
+
+        return None
+
+
+def internalcode(f: F) -> F:
+    """Marks the function as internally used"""
+    internal_code.add(f.__code__)
+    return f
+
+
+def is_undefined(obj: t.Any) -> bool:
+    """Check if the object passed is undefined.  This does nothing more than
+    performing an instance check against :class:`Undefined` but looks nicer.
+    This can be used for custom filters or tests that want to react to
+    undefined variables.  For example a custom default filter can look like
+    this::
+
+        def default(var, default=''):
+            if is_undefined(var):
+                return default
+            return var
+    """
+    from .runtime import Undefined
+
+    return isinstance(obj, Undefined)
+
+
+def consume(iterable: t.Iterable[t.Any]) -> None:
+    """Consumes an iterable without doing anything with it."""
+    for _ in iterable:
+        pass
+
+
+def clear_caches() -> None:
+    """Jinja keeps internal caches for environments and lexers.  These are
+    used so that Jinja doesn't have to recreate environments and lexers all
+    the time.  Normally you don't have to care about that but if you are
+    measuring memory consumption you may want to clean the caches.
+    """
+    from .environment import get_spontaneous_environment
+    from .lexer import _lexer_cache
+
+    get_spontaneous_environment.cache_clear()
+    _lexer_cache.clear()
+
+
+def import_string(import_name: str, silent: bool = False) -> t.Any:
+    """Imports an object based on a string.  This is useful if you want to
+    use import paths as endpoints or something similar.  An import path can
+    be specified either in dotted notation (``xml.sax.saxutils.escape``)
+    or with a colon as object delimiter (``xml.sax.saxutils:escape``).
+
+    If the `silent` is True the return value will be `None` if the import
+    fails.
+
+    :return: imported object
+    """
+    try:
+        if ":" in import_name:
+            module, obj = import_name.split(":", 1)
+        elif "." in import_name:
+            module, _, obj = import_name.rpartition(".")
+        else:
+            return __import__(import_name)
+        return getattr(__import__(module, None, None, [obj]), obj)
+    except (ImportError, AttributeError):
+        if not silent:
+            raise
+
+
+def open_if_exists(filename: str, mode: str = "rb") -> t.Optional[t.IO]:
+    """Returns a file descriptor for the filename if that file exists,
+    otherwise ``None``.
+    """
+    if not os.path.isfile(filename):
+        return None
+
+    return open(filename, mode)
+
+
+def object_type_repr(obj: t.Any) -> str:
+    """Returns the name of the object's type.  For some recognized
+    singletons the name of the object is returned instead. (For
+    example for `None` and `Ellipsis`).
+    """
+    if obj is None:
+        return "None"
+    elif obj is Ellipsis:
+        return "Ellipsis"
+
+    cls = type(obj)
+
+    if cls.__module__ == "builtins":
+        return f"{cls.__name__} object"
+
+    return f"{cls.__module__}.{cls.__name__} object"
+
+
+def pformat(obj: t.Any) -> str:
+    """Format an object using :func:`pprint.pformat`."""
+    from pprint import pformat  # type: ignore
+
+    return pformat(obj)
+
+
+_http_re = re.compile(
+    r"""
+    ^
+    (
+        (https?://|www\.)  # scheme or www
+        (([\w%-]+\.)+)?  # subdomain
+        (
+            [a-z]{2,63}  # basic tld
+        |
+            xn--[\w%]{2,59}  # idna tld
+        )
+    |
+        ([\w%-]{2,63}\.)+  # basic domain
+        (com|net|int|edu|gov|org|info|mil)  # basic tld
+    |
+        (https?://)  # scheme
+        (
+            (([\d]{1,3})(\.[\d]{1,3}){3})  # IPv4
+        |
+            (\[([\da-f]{0,4}:){2}([\da-f]{0,4}:?){1,6}])  # IPv6
+        )
+    )
+    (?::[\d]{1,5})?  # port
+    (?:[/?#]\S*)?  # path, query, and fragment
+    $
+    """,
+    re.IGNORECASE | re.VERBOSE,
+)
+_email_re = re.compile(r"^\S+@\w[\w.-]*\.\w+$")
+
+
+def urlize(
+    text: str,
+    trim_url_limit: t.Optional[int] = None,
+    rel: t.Optional[str] = None,
+    target: t.Optional[str] = None,
+    extra_schemes: t.Optional[t.Iterable[str]] = None,
+) -> str:
+    """Convert URLs in text into clickable links.
+
+    This may not recognize links in some situations. Usually, a more
+    comprehensive formatter, such as a Markdown library, is a better
+    choice.
+
+    Works on ``http://``, ``https://``, ``www.``, ``mailto:``, and email
+    addresses. Links with trailing punctuation (periods, commas, closing
+    parentheses) and leading punctuation (opening parentheses) are
+    recognized excluding the punctuation. Email addresses that include
+    header fields are not recognized (for example,
+    ``mailto:address@example.com?cc=copy@example.com``).
+
+    :param text: Original text containing URLs to link.
+    :param trim_url_limit: Shorten displayed URL values to this length.
+    :param target: Add the ``target`` attribute to links.
+    :param rel: Add the ``rel`` attribute to links.
+    :param extra_schemes: Recognize URLs that start with these schemes
+        in addition to the default behavior.
+
+    .. versionchanged:: 3.0
+        The ``extra_schemes`` parameter was added.
+
+    .. versionchanged:: 3.0
+        Generate ``https://`` links for URLs without a scheme.
+
+    .. versionchanged:: 3.0
+        The parsing rules were updated. Recognize email addresses with
+        or without the ``mailto:`` scheme. Validate IP addresses. Ignore
+        parentheses and brackets in more cases.
+    """
+    if trim_url_limit is not None:
+
+        def trim_url(x: str) -> str:
+            if len(x) > trim_url_limit:  # type: ignore
+                return f"{x[:trim_url_limit]}..."
+
+            return x
+
+    else:
+
+        def trim_url(x: str) -> str:
+            return x
+
+    words = re.split(r"(\s+)", str(markupsafe.escape(text)))
+    rel_attr = f' rel="{markupsafe.escape(rel)}"' if rel else ""
+    target_attr = f' target="{markupsafe.escape(target)}"' if target else ""
+
+    for i, word in enumerate(words):
+        head, middle, tail = "", word, ""
+        match = re.match(r"^([(<]|&lt;)+", middle)
+
+        if match:
+            head = match.group()
+            middle = middle[match.end() :]
+
+        # Unlike lead, which is anchored to the start of the string,
+        # need to check that the string ends with any of the characters
+        # before trying to match all of them, to avoid backtracking.
+        if middle.endswith((")", ">", ".", ",", "\n", "&gt;")):
+            match = re.search(r"([)>.,\n]|&gt;)+$", middle)
+
+            if match:
+                tail = match.group()
+                middle = middle[: match.start()]
+
+        # Prefer balancing parentheses in URLs instead of ignoring a
+        # trailing character.
+        for start_char, end_char in ("(", ")"), ("<", ">"), ("&lt;", "&gt;"):
+            start_count = middle.count(start_char)
+
+            if start_count <= middle.count(end_char):
+                # Balanced, or lighter on the left
+                continue
+
+            # Move as many as possible from the tail to balance
+            for _ in range(min(start_count, tail.count(end_char))):
+                end_index = tail.index(end_char) + len(end_char)
+                # Move anything in the tail before the end char too
+                middle += tail[:end_index]
+                tail = tail[end_index:]
+
+        if _http_re.match(middle):
+            if middle.startswith("https://") or middle.startswith("http://"):
+                middle = (
+                    f'<a href="{middle}"{rel_attr}{target_attr}>{trim_url(middle)}</a>'
+                )
+            else:
+                middle = (
+                    f'<a href="https://{middle}"{rel_attr}{target_attr}>'
+                    f"{trim_url(middle)}</a>"
+                )
+
+        elif middle.startswith("mailto:") and _email_re.match(middle[7:]):
+            middle = f'<a href="{middle}">{middle[7:]}</a>'
+
+        elif (
+            "@" in middle
+            and not middle.startswith("www.")
+            and ":" not in middle
+            and _email_re.match(middle)
+        ):
+            middle = f'<a href="mailto:{middle}">{middle}</a>'
+
+        elif extra_schemes is not None:
+            for scheme in extra_schemes:
+                if middle != scheme and middle.startswith(scheme):
+                    middle = f'<a href="{middle}"{rel_attr}{target_attr}>{middle}</a>'
+
+        words[i] = f"{head}{middle}{tail}"
+
+    return "".join(words)
+
+
+def generate_lorem_ipsum(
+    n: int = 5, html: bool = True, min: int = 20, max: int = 100
+) -> str:
+    """Generate some lorem ipsum for the template."""
+    from .constants import LOREM_IPSUM_WORDS
+
+    words = LOREM_IPSUM_WORDS.split()
+    result = []
+
+    for _ in range(n):
+        next_capitalized = True
+        last_comma = last_fullstop = 0
+        word = None
+        last = None
+        p = []
+
+        # each paragraph contains out of 20 to 100 words.
+        for idx, _ in enumerate(range(randrange(min, max))):
+            while True:
+                word = choice(words)
+                if word != last:
+                    last = word
+                    break
+            if next_capitalized:
+                word = word.capitalize()
+                next_capitalized = False
+            # add commas
+            if idx - randrange(3, 8) > last_comma:
+                last_comma = idx
+                last_fullstop += 2
+                word += ","
+            # add end of sentences
+            if idx - randrange(10, 20) > last_fullstop:
+                last_comma = last_fullstop = idx
+                word += "."
+                next_capitalized = True
+            p.append(word)
+
+        # ensure that the paragraph ends with a dot.
+        p_str = " ".join(p)
+
+        if p_str.endswith(","):
+            p_str = p_str[:-1] + "."
+        elif not p_str.endswith("."):
+            p_str += "."
+
+        result.append(p_str)
+
+    if not html:
+        return "\n\n".join(result)
+    return markupsafe.Markup(
+        "\n".join(f"<p>{markupsafe.escape(x)}</p>" for x in result)
+    )
+
+
+def url_quote(obj: t.Any, charset: str = "utf-8", for_qs: bool = False) -> str:
+    """Quote a string for use in a URL using the given charset.
+
+    :param obj: String or bytes to quote. Other types are converted to
+        string then encoded to bytes using the given charset.
+    :param charset: Encode text to bytes using this charset.
+    :param for_qs: Quote "/" and use "+" for spaces.
+    """
+    if not isinstance(obj, bytes):
+        if not isinstance(obj, str):
+            obj = str(obj)
+
+        obj = obj.encode(charset)
+
+    safe = b"" if for_qs else b"/"
+    rv = quote_from_bytes(obj, safe)
+
+    if for_qs:
+        rv = rv.replace("%20", "+")
+
+    return rv
+
+
+@abc.MutableMapping.register
+class LRUCache:
+    """A simple LRU Cache implementation."""
+
+    # this is fast for small capacities (something below 1000) but doesn't
+    # scale.  But as long as it's only used as storage for templates this
+    # won't do any harm.
+
+    def __init__(self, capacity: int) -> None:
+        self.capacity = capacity
+        self._mapping: t.Dict[t.Any, t.Any] = {}
+        self._queue: "te.Deque[t.Any]" = deque()
+        self._postinit()
+
+    def _postinit(self) -> None:
+        # alias all queue methods for faster lookup
+        self._popleft = self._queue.popleft
+        self._pop = self._queue.pop
+        self._remove = self._queue.remove
+        self._wlock = Lock()
+        self._append = self._queue.append
+
+    def __getstate__(self) -> t.Mapping[str, t.Any]:
+        return {
+            "capacity": self.capacity,
+            "_mapping": self._mapping,
+            "_queue": self._queue,
+        }
+
+    def __setstate__(self, d: t.Mapping[str, t.Any]) -> None:
+        self.__dict__.update(d)
+        self._postinit()
+
+    def __getnewargs__(self) -> t.Tuple:
+        return (self.capacity,)
+
+    def copy(self) -> "LRUCache":
+        """Return a shallow copy of the instance."""
+        rv = self.__class__(self.capacity)
+        rv._mapping.update(self._mapping)
+        rv._queue.extend(self._queue)
+        return rv
+
+    def get(self, key: t.Any, default: t.Any = None) -> t.Any:
+        """Return an item from the cache dict or `default`"""
+        try:
+            return self[key]
+        except KeyError:
+            return default
+
+    def setdefault(self, key: t.Any, default: t.Any = None) -> t.Any:
+        """Set `default` if the key is not in the cache otherwise
+        leave unchanged. Return the value of this key.
+        """
+        try:
+            return self[key]
+        except KeyError:
+            self[key] = default
+            return default
+
+    def clear(self) -> None:
+        """Clear the cache."""
+        with self._wlock:
+            self._mapping.clear()
+            self._queue.clear()
+
+    def __contains__(self, key: t.Any) -> bool:
+        """Check if a key exists in this cache."""
+        return key in self._mapping
+
+    def __len__(self) -> int:
+        """Return the current size of the cache."""
+        return len(self._mapping)
+
+    def __repr__(self) -> str:
+        return f"<{type(self).__name__} {self._mapping!r}>"
+
+    def __getitem__(self, key: t.Any) -> t.Any:
+        """Get an item from the cache. Moves the item up so that it has the
+        highest priority then.
+
+        Raise a `KeyError` if it does not exist.
+        """
+        with self._wlock:
+            rv = self._mapping[key]
+
+            if self._queue[-1] != key:
+                try:
+                    self._remove(key)
+                except ValueError:
+                    # if something removed the key from the container
+                    # when we read, ignore the ValueError that we would
+                    # get otherwise.
+                    pass
+
+                self._append(key)
+
+            return rv
+
+    def __setitem__(self, key: t.Any, value: t.Any) -> None:
+        """Sets the value for an item. Moves the item up so that it
+        has the highest priority then.
+        """
+        with self._wlock:
+            if key in self._mapping:
+                self._remove(key)
+            elif len(self._mapping) == self.capacity:
+                del self._mapping[self._popleft()]
+
+            self._append(key)
+            self._mapping[key] = value
+
+    def __delitem__(self, key: t.Any) -> None:
+        """Remove an item from the cache dict.
+        Raise a `KeyError` if it does not exist.
+        """
+        with self._wlock:
+            del self._mapping[key]
+
+            try:
+                self._remove(key)
+            except ValueError:
+                pass
+
+    def items(self) -> t.Iterable[t.Tuple[t.Any, t.Any]]:
+        """Return a list of items."""
+        result = [(key, self._mapping[key]) for key in list(self._queue)]
+        result.reverse()
+        return result
+
+    def values(self) -> t.Iterable[t.Any]:
+        """Return a list of all values."""
+        return [x[1] for x in self.items()]
+
+    def keys(self) -> t.Iterable[t.Any]:
+        """Return a list of all keys ordered by most recent usage."""
+        return list(self)
+
+    def __iter__(self) -> t.Iterator[t.Any]:
+        return reversed(tuple(self._queue))
+
+    def __reversed__(self) -> t.Iterator[t.Any]:
+        """Iterate over the keys in the cache dict, oldest items
+        coming first.
+        """
+        return iter(tuple(self._queue))
+
+    __copy__ = copy
+
+
+def select_autoescape(
+    enabled_extensions: t.Collection[str] = ("html", "htm", "xml"),
+    disabled_extensions: t.Collection[str] = (),
+    default_for_string: bool = True,
+    default: bool = False,
+) -> t.Callable[[t.Optional[str]], bool]:
+    """Intelligently sets the initial value of autoescaping based on the
+    filename of the template.  This is the recommended way to configure
+    autoescaping if you do not want to write a custom function yourself.
+
+    If you want to enable it for all templates created from strings or
+    for all templates with `.html` and `.xml` extensions::
+
+        from jinja2 import Environment, select_autoescape
+        env = Environment(autoescape=select_autoescape(
+            enabled_extensions=('html', 'xml'),
+            default_for_string=True,
+        ))
+
+    Example configuration to turn it on at all times except if the template
+    ends with `.txt`::
+
+        from jinja2 import Environment, select_autoescape
+        env = Environment(autoescape=select_autoescape(
+            disabled_extensions=('txt',),
+            default_for_string=True,
+            default=True,
+        ))
+
+    The `enabled_extensions` is an iterable of all the extensions that
+    autoescaping should be enabled for.  Likewise `disabled_extensions` is
+    a list of all templates it should be disabled for.  If a template is
+    loaded from a string then the default from `default_for_string` is used.
+    If nothing matches then the initial value of autoescaping is set to the
+    value of `default`.
+
+    For security reasons this function operates case insensitive.
+
+    .. versionadded:: 2.9
+    """
+    enabled_patterns = tuple(f".{x.lstrip('.').lower()}" for x in enabled_extensions)
+    disabled_patterns = tuple(f".{x.lstrip('.').lower()}" for x in disabled_extensions)
+
+    def autoescape(template_name: t.Optional[str]) -> bool:
+        if template_name is None:
+            return default_for_string
+        template_name = template_name.lower()
+        if template_name.endswith(enabled_patterns):
+            return True
+        if template_name.endswith(disabled_patterns):
+            return False
+        return default
+
+    return autoescape
+
+
+def htmlsafe_json_dumps(
+    obj: t.Any, dumps: t.Optional[t.Callable[..., str]] = None, **kwargs: t.Any
+) -> markupsafe.Markup:
+    """Serialize an object to a string of JSON with :func:`json.dumps`,
+    then replace HTML-unsafe characters with Unicode escapes and mark
+    the result safe with :class:`~markupsafe.Markup`.
+
+    This is available in templates as the ``|tojson`` filter.
+
+    The following characters are escaped: ``<``, ``>``, ``&``, ``'``.
+
+    The returned string is safe to render in HTML documents and
+    ``<script>`` tags. The exception is in HTML attributes that are
+    double quoted; either use single quotes or the ``|forceescape``
+    filter.
+
+    :param obj: The object to serialize to JSON.
+    :param dumps: The ``dumps`` function to use. Defaults to
+        ``env.policies["json.dumps_function"]``, which defaults to
+        :func:`json.dumps`.
+    :param kwargs: Extra arguments to pass to ``dumps``. Merged onto
+        ``env.policies["json.dumps_kwargs"]``.
+
+    .. versionchanged:: 3.0
+        The ``dumper`` parameter is renamed to ``dumps``.
+
+    .. versionadded:: 2.9
+    """
+    if dumps is None:
+        dumps = json.dumps
+
+    return markupsafe.Markup(
+        dumps(obj, **kwargs)
+        .replace("<", "\\u003c")
+        .replace(">", "\\u003e")
+        .replace("&", "\\u0026")
+        .replace("'", "\\u0027")
+    )
+
+
+class Cycler:
+    """Cycle through values by yield them one at a time, then restarting
+    once the end is reached. Available as ``cycler`` in templates.
+
+    Similar to ``loop.cycle``, but can be used outside loops or across
+    multiple loops. For example, render a list of folders and files in a
+    list, alternating giving them "odd" and "even" classes.
+
+    .. code-block:: html+jinja
+
+        {% set row_class = cycler("odd", "even") %}
+        <ul class="browser">
+        {% for folder in folders %}
+          <li class="folder {{ row_class.next() }}">{{ folder }}
+        {% endfor %}
+        {% for file in files %}
+          <li class="file {{ row_class.next() }}">{{ file }}
+        {% endfor %}
+        </ul>
+
+    :param items: Each positional argument will be yielded in the order
+        given for each cycle.
+
+    .. versionadded:: 2.1
+    """
+
+    def __init__(self, *items: t.Any) -> None:
+        if not items:
+            raise RuntimeError("at least one item has to be provided")
+        self.items = items
+        self.pos = 0
+
+    def reset(self) -> None:
+        """Resets the current item to the first item."""
+        self.pos = 0
+
+    @property
+    def current(self) -> t.Any:
+        """Return the current item. Equivalent to the item that will be
+        returned next time :meth:`next` is called.
+        """
+        return self.items[self.pos]
+
+    def next(self) -> t.Any:
+        """Return the current item, then advance :attr:`current` to the
+        next item.
+        """
+        rv = self.current
+        self.pos = (self.pos + 1) % len(self.items)
+        return rv
+
+    __next__ = next
+
+
+class Joiner:
+    """A joining helper for templates."""
+
+    def __init__(self, sep: str = ", ") -> None:
+        self.sep = sep
+        self.used = False
+
+    def __call__(self) -> str:
+        if not self.used:
+            self.used = True
+            return ""
+        return self.sep
+
+
+class Namespace:
+    """A namespace object that can hold arbitrary attributes.  It may be
+    initialized from a dictionary or with keyword arguments."""
+
+    def __init__(*args: t.Any, **kwargs: t.Any) -> None:  # noqa: B902
+        self, args = args[0], args[1:]
+        self.__attrs = dict(*args, **kwargs)
+
+    def __getattribute__(self, name: str) -> t.Any:
+        # __class__ is needed for the awaitable check in async mode
+        if name in {"_Namespace__attrs", "__class__"}:
+            return object.__getattribute__(self, name)
+        try:
+            return self.__attrs[name]
+        except KeyError:
+            raise AttributeError(name) from None
+
+    def __setitem__(self, name: str, value: t.Any) -> None:
+        self.__attrs[name] = value
+
+    def __repr__(self) -> str:
+        return f"<Namespace {self.__attrs!r}>"
diff --git a/venv/lib/python3.9/site-packages/jinja2/visitor.py b/venv/lib/python3.9/site-packages/jinja2/visitor.py
new file mode 100644
index 0000000..17c6aab
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/jinja2/visitor.py
@@ -0,0 +1,92 @@
+"""API for traversing the AST nodes. Implemented by the compiler and
+meta introspection.
+"""
+import typing as t
+
+from .nodes import Node
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
+    class VisitCallable(te.Protocol):
+        def __call__(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any:
+            ...
+
+
+class NodeVisitor:
+    """Walks the abstract syntax tree and call visitor functions for every
+    node found.  The visitor functions may return values which will be
+    forwarded by the `visit` method.
+
+    Per default the visitor functions for the nodes are ``'visit_'`` +
+    class name of the node.  So a `TryFinally` node visit function would
+    be `visit_TryFinally`.  This behavior can be changed by overriding
+    the `get_visitor` function.  If no visitor function exists for a node
+    (return value `None`) the `generic_visit` visitor is used instead.
+    """
+
+    def get_visitor(self, node: Node) -> "t.Optional[VisitCallable]":
+        """Return the visitor function for this node or `None` if no visitor
+        exists for this node.  In that case the generic visit function is
+        used instead.
+        """
+        return getattr(self, f"visit_{type(node).__name__}", None)
+
+    def visit(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        """Visit a node."""
+        f = self.get_visitor(node)
+
+        if f is not None:
+            return f(node, *args, **kwargs)
+
+        return self.generic_visit(node, *args, **kwargs)
+
+    def generic_visit(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any:
+        """Called if no explicit visitor function exists for a node."""
+        for child_node in node.iter_child_nodes():
+            self.visit(child_node, *args, **kwargs)
+
+
+class NodeTransformer(NodeVisitor):
+    """Walks the abstract syntax tree and allows modifications of nodes.
+
+    The `NodeTransformer` will walk the AST and use the return value of the
+    visitor functions to replace or remove the old node.  If the return
+    value of the visitor function is `None` the node will be removed
+    from the previous location otherwise it's replaced with the return
+    value.  The return value may be the original node in which case no
+    replacement takes place.
+    """
+
+    def generic_visit(self, node: Node, *args: t.Any, **kwargs: t.Any) -> Node:
+        for field, old_value in node.iter_fields():
+            if isinstance(old_value, list):
+                new_values = []
+                for value in old_value:
+                    if isinstance(value, Node):
+                        value = self.visit(value, *args, **kwargs)
+                        if value is None:
+                            continue
+                        elif not isinstance(value, Node):
+                            new_values.extend(value)
+                            continue
+                    new_values.append(value)
+                old_value[:] = new_values
+            elif isinstance(old_value, Node):
+                new_node = self.visit(old_value, *args, **kwargs)
+                if new_node is None:
+                    delattr(node, field)
+                else:
+                    setattr(node, field, new_node)
+        return node
+
+    def visit_list(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.List[Node]:
+        """As transformers may return lists in some places this method
+        can be used to enforce a list as return value.
+        """
+        rv = self.visit(node, *args, **kwargs)
+
+        if not isinstance(rv, list):
+            return [rv]
+
+        return rv
diff --git a/venv/lib/python3.9/site-packages/markupsafe/__init__.py b/venv/lib/python3.9/site-packages/markupsafe/__init__.py
new file mode 100644
index 0000000..0f1c4f4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/__init__.py
@@ -0,0 +1,295 @@
+import functools
+import re
+import string
+import typing as t
+
+if t.TYPE_CHECKING:
+    import typing_extensions as te
+
+    class HasHTML(te.Protocol):
+        def __html__(self) -> str:
+            pass
+
+
+__version__ = "2.1.1"
+
+_strip_comments_re = re.compile(r"<!--.*?-->")
+_strip_tags_re = re.compile(r"<.*?>")
+
+
+def _simple_escaping_wrapper(name: str) -> t.Callable[..., "Markup"]:
+    orig = getattr(str, name)
+
+    @functools.wraps(orig)
+    def wrapped(self: "Markup", *args: t.Any, **kwargs: t.Any) -> "Markup":
+        args = _escape_argspec(list(args), enumerate(args), self.escape)  # type: ignore
+        _escape_argspec(kwargs, kwargs.items(), self.escape)
+        return self.__class__(orig(self, *args, **kwargs))
+
+    return wrapped
+
+
+class Markup(str):
+    """A string that is ready to be safely inserted into an HTML or XML
+    document, either because it was escaped or because it was marked
+    safe.
+
+    Passing an object to the constructor converts it to text and wraps
+    it to mark it safe without escaping. To escape the text, use the
+    :meth:`escape` class method instead.
+
+    >>> Markup("Hello, <em>World</em>!")
+    Markup('Hello, <em>World</em>!')
+    >>> Markup(42)
+    Markup('42')
+    >>> Markup.escape("Hello, <em>World</em>!")
+    Markup('Hello &lt;em&gt;World&lt;/em&gt;!')
+
+    This implements the ``__html__()`` interface that some frameworks
+    use. Passing an object that implements ``__html__()`` will wrap the
+    output of that method, marking it safe.
+
+    >>> class Foo:
+    ...     def __html__(self):
+    ...         return '<a href="/foo">foo</a>'
+    ...
+    >>> Markup(Foo())
+    Markup('<a href="/foo">foo</a>')
+
+    This is a subclass of :class:`str`. It has the same methods, but
+    escapes their arguments and returns a ``Markup`` instance.
+
+    >>> Markup("<em>%s</em>") % ("foo & bar",)
+    Markup('<em>foo &amp; bar</em>')
+    >>> Markup("<em>Hello</em> ") + "<foo>"
+    Markup('<em>Hello</em> &lt;foo&gt;')
+    """
+
+    __slots__ = ()
+
+    def __new__(
+        cls, base: t.Any = "", encoding: t.Optional[str] = None, errors: str = "strict"
+    ) -> "Markup":
+        if hasattr(base, "__html__"):
+            base = base.__html__()
+
+        if encoding is None:
+            return super().__new__(cls, base)
+
+        return super().__new__(cls, base, encoding, errors)
+
+    def __html__(self) -> "Markup":
+        return self
+
+    def __add__(self, other: t.Union[str, "HasHTML"]) -> "Markup":
+        if isinstance(other, str) or hasattr(other, "__html__"):
+            return self.__class__(super().__add__(self.escape(other)))
+
+        return NotImplemented
+
+    def __radd__(self, other: t.Union[str, "HasHTML"]) -> "Markup":
+        if isinstance(other, str) or hasattr(other, "__html__"):
+            return self.escape(other).__add__(self)
+
+        return NotImplemented
+
+    def __mul__(self, num: "te.SupportsIndex") -> "Markup":
+        if isinstance(num, int):
+            return self.__class__(super().__mul__(num))
+
+        return NotImplemented
+
+    __rmul__ = __mul__
+
+    def __mod__(self, arg: t.Any) -> "Markup":
+        if isinstance(arg, tuple):
+            # a tuple of arguments, each wrapped
+            arg = tuple(_MarkupEscapeHelper(x, self.escape) for x in arg)
+        elif hasattr(type(arg), "__getitem__") and not isinstance(arg, str):
+            # a mapping of arguments, wrapped
+            arg = _MarkupEscapeHelper(arg, self.escape)
+        else:
+            # a single argument, wrapped with the helper and a tuple
+            arg = (_MarkupEscapeHelper(arg, self.escape),)
+
+        return self.__class__(super().__mod__(arg))
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}({super().__repr__()})"
+
+    def join(self, seq: t.Iterable[t.Union[str, "HasHTML"]]) -> "Markup":
+        return self.__class__(super().join(map(self.escape, seq)))
+
+    join.__doc__ = str.join.__doc__
+
+    def split(  # type: ignore
+        self, sep: t.Optional[str] = None, maxsplit: int = -1
+    ) -> t.List["Markup"]:
+        return [self.__class__(v) for v in super().split(sep, maxsplit)]
+
+    split.__doc__ = str.split.__doc__
+
+    def rsplit(  # type: ignore
+        self, sep: t.Optional[str] = None, maxsplit: int = -1
+    ) -> t.List["Markup"]:
+        return [self.__class__(v) for v in super().rsplit(sep, maxsplit)]
+
+    rsplit.__doc__ = str.rsplit.__doc__
+
+    def splitlines(self, keepends: bool = False) -> t.List["Markup"]:  # type: ignore
+        return [self.__class__(v) for v in super().splitlines(keepends)]
+
+    splitlines.__doc__ = str.splitlines.__doc__
+
+    def unescape(self) -> str:
+        """Convert escaped markup back into a text string. This replaces
+        HTML entities with the characters they represent.
+
+        >>> Markup("Main &raquo; <em>About</em>").unescape()
+        'Main » <em>About</em>'
+        """
+        from html import unescape
+
+        return unescape(str(self))
+
+    def striptags(self) -> str:
+        """:meth:`unescape` the markup, remove tags, and normalize
+        whitespace to single spaces.
+
+        >>> Markup("Main &raquo;\t<em>About</em>").striptags()
+        'Main » About'
+        """
+        # Use two regexes to avoid ambiguous matches.
+        value = _strip_comments_re.sub("", self)
+        value = _strip_tags_re.sub("", value)
+        value = " ".join(value.split())
+        return Markup(value).unescape()
+
+    @classmethod
+    def escape(cls, s: t.Any) -> "Markup":
+        """Escape a string. Calls :func:`escape` and ensures that for
+        subclasses the correct type is returned.
+        """
+        rv = escape(s)
+
+        if rv.__class__ is not cls:
+            return cls(rv)
+
+        return rv
+
+    for method in (
+        "__getitem__",
+        "capitalize",
+        "title",
+        "lower",
+        "upper",
+        "replace",
+        "ljust",
+        "rjust",
+        "lstrip",
+        "rstrip",
+        "center",
+        "strip",
+        "translate",
+        "expandtabs",
+        "swapcase",
+        "zfill",
+    ):
+        locals()[method] = _simple_escaping_wrapper(method)
+
+    del method
+
+    def partition(self, sep: str) -> t.Tuple["Markup", "Markup", "Markup"]:
+        l, s, r = super().partition(self.escape(sep))
+        cls = self.__class__
+        return cls(l), cls(s), cls(r)
+
+    def rpartition(self, sep: str) -> t.Tuple["Markup", "Markup", "Markup"]:
+        l, s, r = super().rpartition(self.escape(sep))
+        cls = self.__class__
+        return cls(l), cls(s), cls(r)
+
+    def format(self, *args: t.Any, **kwargs: t.Any) -> "Markup":
+        formatter = EscapeFormatter(self.escape)
+        return self.__class__(formatter.vformat(self, args, kwargs))
+
+    def __html_format__(self, format_spec: str) -> "Markup":
+        if format_spec:
+            raise ValueError("Unsupported format specification for Markup.")
+
+        return self
+
+
+class EscapeFormatter(string.Formatter):
+    __slots__ = ("escape",)
+
+    def __init__(self, escape: t.Callable[[t.Any], Markup]) -> None:
+        self.escape = escape
+        super().__init__()
+
+    def format_field(self, value: t.Any, format_spec: str) -> str:
+        if hasattr(value, "__html_format__"):
+            rv = value.__html_format__(format_spec)
+        elif hasattr(value, "__html__"):
+            if format_spec:
+                raise ValueError(
+                    f"Format specifier {format_spec} given, but {type(value)} does not"
+                    " define __html_format__. A class that defines __html__ must define"
+                    " __html_format__ to work with format specifiers."
+                )
+            rv = value.__html__()
+        else:
+            # We need to make sure the format spec is str here as
+            # otherwise the wrong callback methods are invoked.
+            rv = string.Formatter.format_field(self, value, str(format_spec))
+        return str(self.escape(rv))
+
+
+_ListOrDict = t.TypeVar("_ListOrDict", list, dict)
+
+
+def _escape_argspec(
+    obj: _ListOrDict, iterable: t.Iterable[t.Any], escape: t.Callable[[t.Any], Markup]
+) -> _ListOrDict:
+    """Helper for various string-wrapped functions."""
+    for key, value in iterable:
+        if isinstance(value, str) or hasattr(value, "__html__"):
+            obj[key] = escape(value)
+
+    return obj
+
+
+class _MarkupEscapeHelper:
+    """Helper for :meth:`Markup.__mod__`."""
+
+    __slots__ = ("obj", "escape")
+
+    def __init__(self, obj: t.Any, escape: t.Callable[[t.Any], Markup]) -> None:
+        self.obj = obj
+        self.escape = escape
+
+    def __getitem__(self, item: t.Any) -> "_MarkupEscapeHelper":
+        return _MarkupEscapeHelper(self.obj[item], self.escape)
+
+    def __str__(self) -> str:
+        return str(self.escape(self.obj))
+
+    def __repr__(self) -> str:
+        return str(self.escape(repr(self.obj)))
+
+    def __int__(self) -> int:
+        return int(self.obj)
+
+    def __float__(self) -> float:
+        return float(self.obj)
+
+
+# circular import
+try:
+    from ._speedups import escape as escape
+    from ._speedups import escape_silent as escape_silent
+    from ._speedups import soft_str as soft_str
+except ImportError:
+    from ._native import escape as escape
+    from ._native import escape_silent as escape_silent  # noqa: F401
+    from ._native import soft_str as soft_str  # noqa: F401
diff --git a/venv/lib/python3.9/site-packages/markupsafe/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/markupsafe/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..4f2dbb2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/markupsafe/__pycache__/_native.cpython-39.pyc b/venv/lib/python3.9/site-packages/markupsafe/__pycache__/_native.cpython-39.pyc
new file mode 100644
index 0000000..e0ed905
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/__pycache__/_native.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/markupsafe/_native.py b/venv/lib/python3.9/site-packages/markupsafe/_native.py
new file mode 100644
index 0000000..8117b27
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/_native.py
@@ -0,0 +1,63 @@
+import typing as t
+
+from . import Markup
+
+
+def escape(s: t.Any) -> Markup:
+    """Replace the characters ``&``, ``<``, ``>``, ``'``, and ``"`` in
+    the string with HTML-safe sequences. Use this if you need to display
+    text that might contain such characters in HTML.
+
+    If the object has an ``__html__`` method, it is called and the
+    return value is assumed to already be safe for HTML.
+
+    :param s: An object to be converted to a string and escaped.
+    :return: A :class:`Markup` string with the escaped text.
+    """
+    if hasattr(s, "__html__"):
+        return Markup(s.__html__())
+
+    return Markup(
+        str(s)
+        .replace("&", "&amp;")
+        .replace(">", "&gt;")
+        .replace("<", "&lt;")
+        .replace("'", "&#39;")
+        .replace('"', "&#34;")
+    )
+
+
+def escape_silent(s: t.Optional[t.Any]) -> Markup:
+    """Like :func:`escape` but treats ``None`` as the empty string.
+    Useful with optional values, as otherwise you get the string
+    ``'None'`` when the value is ``None``.
+
+    >>> escape(None)
+    Markup('None')
+    >>> escape_silent(None)
+    Markup('')
+    """
+    if s is None:
+        return Markup()
+
+    return escape(s)
+
+
+def soft_str(s: t.Any) -> str:
+    """Convert an object to a string if it isn't already. This preserves
+    a :class:`Markup` string rather than converting it back to a basic
+    string, so it will still be marked as safe and won't be escaped
+    again.
+
+    >>> value = escape("<User 1>")
+    >>> value
+    Markup('&lt;User 1&gt;')
+    >>> escape(str(value))
+    Markup('&amp;lt;User 1&amp;gt;')
+    >>> escape(soft_str(value))
+    Markup('&lt;User 1&gt;')
+    """
+    if not isinstance(s, str):
+        return str(s)
+
+    return s
diff --git a/venv/lib/python3.9/site-packages/markupsafe/_speedups.c b/venv/lib/python3.9/site-packages/markupsafe/_speedups.c
new file mode 100644
index 0000000..3c463fb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/_speedups.c
@@ -0,0 +1,320 @@
+#include <Python.h>
+
+static PyObject* markup;
+
+static int
+init_constants(void)
+{
+	PyObject *module;
+
+	/* import markup type so that we can mark the return value */
+	module = PyImport_ImportModule("markupsafe");
+	if (!module)
+		return 0;
+	markup = PyObject_GetAttrString(module, "Markup");
+	Py_DECREF(module);
+
+	return 1;
+}
+
+#define GET_DELTA(inp, inp_end, delta) \
+	while (inp < inp_end) { \
+		switch (*inp++) { \
+		case '"': \
+		case '\'': \
+		case '&': \
+			delta += 4; \
+			break; \
+		case '<': \
+		case '>': \
+			delta += 3; \
+			break; \
+		} \
+	}
+
+#define DO_ESCAPE(inp, inp_end, outp) \
+	{ \
+		Py_ssize_t ncopy = 0; \
+		while (inp < inp_end) { \
+			switch (*inp) { \
+			case '"': \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&'; \
+				*outp++ = '#'; \
+				*outp++ = '3'; \
+				*outp++ = '4'; \
+				*outp++ = ';'; \
+				break; \
+			case '\'': \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&'; \
+				*outp++ = '#'; \
+				*outp++ = '3'; \
+				*outp++ = '9'; \
+				*outp++ = ';'; \
+				break; \
+			case '&': \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&'; \
+				*outp++ = 'a'; \
+				*outp++ = 'm'; \
+				*outp++ = 'p'; \
+				*outp++ = ';'; \
+				break; \
+			case '<': \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&'; \
+				*outp++ = 'l'; \
+				*outp++ = 't'; \
+				*outp++ = ';'; \
+				break; \
+			case '>': \
+				memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+				outp += ncopy; ncopy = 0; \
+				*outp++ = '&'; \
+				*outp++ = 'g'; \
+				*outp++ = 't'; \
+				*outp++ = ';'; \
+				break; \
+			default: \
+				ncopy++; \
+			} \
+			inp++; \
+		} \
+		memcpy(outp, inp-ncopy, sizeof(*outp)*ncopy); \
+	}
+
+static PyObject*
+escape_unicode_kind1(PyUnicodeObject *in)
+{
+	Py_UCS1 *inp = PyUnicode_1BYTE_DATA(in);
+	Py_UCS1 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS1 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta,
+						PyUnicode_IS_ASCII(in) ? 127 : 255);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_1BYTE_DATA(in);
+	outp = PyUnicode_1BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+static PyObject*
+escape_unicode_kind2(PyUnicodeObject *in)
+{
+	Py_UCS2 *inp = PyUnicode_2BYTE_DATA(in);
+	Py_UCS2 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS2 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 65535);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_2BYTE_DATA(in);
+	outp = PyUnicode_2BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+
+static PyObject*
+escape_unicode_kind4(PyUnicodeObject *in)
+{
+	Py_UCS4 *inp = PyUnicode_4BYTE_DATA(in);
+	Py_UCS4 *inp_end = inp + PyUnicode_GET_LENGTH(in);
+	Py_UCS4 *outp;
+	PyObject *out;
+	Py_ssize_t delta = 0;
+
+	GET_DELTA(inp, inp_end, delta);
+	if (!delta) {
+		Py_INCREF(in);
+		return (PyObject*)in;
+	}
+
+	out = PyUnicode_New(PyUnicode_GET_LENGTH(in) + delta, 1114111);
+	if (!out)
+		return NULL;
+
+	inp = PyUnicode_4BYTE_DATA(in);
+	outp = PyUnicode_4BYTE_DATA(out);
+	DO_ESCAPE(inp, inp_end, outp);
+	return out;
+}
+
+static PyObject*
+escape_unicode(PyUnicodeObject *in)
+{
+	if (PyUnicode_READY(in))
+		return NULL;
+
+	switch (PyUnicode_KIND(in)) {
+	case PyUnicode_1BYTE_KIND:
+		return escape_unicode_kind1(in);
+	case PyUnicode_2BYTE_KIND:
+		return escape_unicode_kind2(in);
+	case PyUnicode_4BYTE_KIND:
+		return escape_unicode_kind4(in);
+	}
+	assert(0);  /* shouldn't happen */
+	return NULL;
+}
+
+static PyObject*
+escape(PyObject *self, PyObject *text)
+{
+	static PyObject *id_html;
+	PyObject *s = NULL, *rv = NULL, *html;
+
+	if (id_html == NULL) {
+		id_html = PyUnicode_InternFromString("__html__");
+		if (id_html == NULL) {
+			return NULL;
+		}
+	}
+
+	/* we don't have to escape integers, bools or floats */
+	if (PyLong_CheckExact(text) ||
+		PyFloat_CheckExact(text) || PyBool_Check(text) ||
+		text == Py_None)
+		return PyObject_CallFunctionObjArgs(markup, text, NULL);
+
+	/* if the object has an __html__ method that performs the escaping */
+	html = PyObject_GetAttr(text ,id_html);
+	if (html) {
+		s = PyObject_CallObject(html, NULL);
+		Py_DECREF(html);
+		if (s == NULL) {
+			return NULL;
+		}
+		/* Convert to Markup object */
+		rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
+		Py_DECREF(s);
+		return rv;
+	}
+
+	/* otherwise make the object unicode if it isn't, then escape */
+	PyErr_Clear();
+	if (!PyUnicode_Check(text)) {
+		PyObject *unicode = PyObject_Str(text);
+		if (!unicode)
+			return NULL;
+		s = escape_unicode((PyUnicodeObject*)unicode);
+		Py_DECREF(unicode);
+	}
+	else
+		s = escape_unicode((PyUnicodeObject*)text);
+
+	/* convert the unicode string into a markup object. */
+	rv = PyObject_CallFunctionObjArgs(markup, (PyObject*)s, NULL);
+	Py_DECREF(s);
+	return rv;
+}
+
+
+static PyObject*
+escape_silent(PyObject *self, PyObject *text)
+{
+	if (text != Py_None)
+		return escape(self, text);
+	return PyObject_CallFunctionObjArgs(markup, NULL);
+}
+
+
+static PyObject*
+soft_str(PyObject *self, PyObject *s)
+{
+	if (!PyUnicode_Check(s))
+		return PyObject_Str(s);
+	Py_INCREF(s);
+	return s;
+}
+
+
+static PyMethodDef module_methods[] = {
+	{
+		"escape",
+		(PyCFunction)escape,
+		METH_O,
+		"Replace the characters ``&``, ``<``, ``>``, ``'``, and ``\"`` in"
+		" the string with HTML-safe sequences. Use this if you need to display"
+		" text that might contain such characters in HTML.\n\n"
+		"If the object has an ``__html__`` method, it is called and the"
+		" return value is assumed to already be safe for HTML.\n\n"
+		":param s: An object to be converted to a string and escaped.\n"
+		":return: A :class:`Markup` string with the escaped text.\n"
+	},
+	{
+		"escape_silent",
+		(PyCFunction)escape_silent,
+		METH_O,
+		"Like :func:`escape` but treats ``None`` as the empty string."
+		" Useful with optional values, as otherwise you get the string"
+		" ``'None'`` when the value is ``None``.\n\n"
+		">>> escape(None)\n"
+		"Markup('None')\n"
+		">>> escape_silent(None)\n"
+		"Markup('')\n"
+	},
+	{
+		"soft_str",
+		(PyCFunction)soft_str,
+		METH_O,
+		"Convert an object to a string if it isn't already. This preserves"
+		" a :class:`Markup` string rather than converting it back to a basic"
+		" string, so it will still be marked as safe and won't be escaped"
+		" again.\n\n"
+		">>> value = escape(\"<User 1>\")\n"
+		">>> value\n"
+		"Markup('&lt;User 1&gt;')\n"
+		">>> escape(str(value))\n"
+		"Markup('&amp;lt;User 1&amp;gt;')\n"
+		">>> escape(soft_str(value))\n"
+		"Markup('&lt;User 1&gt;')\n"
+	},
+	{NULL, NULL, 0, NULL}  /* Sentinel */
+};
+
+static struct PyModuleDef module_definition = {
+	PyModuleDef_HEAD_INIT,
+	"markupsafe._speedups",
+	NULL,
+	-1,
+	module_methods,
+	NULL,
+	NULL,
+	NULL,
+	NULL
+};
+
+PyMODINIT_FUNC
+PyInit__speedups(void)
+{
+	if (!init_constants())
+		return NULL;
+
+	return PyModule_Create(&module_definition);
+}
diff --git a/venv/lib/python3.9/site-packages/markupsafe/_speedups.cpython-39-x86_64-linux-gnu.so b/venv/lib/python3.9/site-packages/markupsafe/_speedups.cpython-39-x86_64-linux-gnu.so
new file mode 100755
index 0000000..7c79765
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/_speedups.cpython-39-x86_64-linux-gnu.so
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/markupsafe/_speedups.pyi b/venv/lib/python3.9/site-packages/markupsafe/_speedups.pyi
new file mode 100644
index 0000000..f673240
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/_speedups.pyi
@@ -0,0 +1,9 @@
+from typing import Any
+from typing import Optional
+
+from . import Markup
+
+def escape(s: Any) -> Markup: ...
+def escape_silent(s: Optional[Any]) -> Markup: ...
+def soft_str(s: Any) -> str: ...
+def soft_unicode(s: Any) -> str: ...
diff --git a/venv/lib/python3.9/site-packages/markupsafe/py.typed b/venv/lib/python3.9/site-packages/markupsafe/py.typed
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/markupsafe/py.typed
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/LICENSE.txt b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/LICENSE.txt
new file mode 100644
index 0000000..8e7b65e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2008-present The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/METADATA b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/METADATA
new file mode 100644
index 0000000..e935e1a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/METADATA
@@ -0,0 +1,88 @@
+Metadata-Version: 2.1
+Name: pip
+Version: 22.3.1
+Summary: The PyPA recommended tool for installing Python packages.
+Home-page: https://pip.pypa.io/
+Author: The pip developers
+Author-email: distutils-sig@python.org
+License: MIT
+Project-URL: Documentation, https://pip.pypa.io
+Project-URL: Source, https://github.com/pypa/pip
+Project-URL: Changelog, https://pip.pypa.io/en/stable/news/
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Topic :: Software Development :: Build Tools
+Classifier: Programming Language :: Python
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3 :: Only
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Programming Language :: Python :: 3.9
+Classifier: Programming Language :: Python :: 3.10
+Classifier: Programming Language :: Python :: 3.11
+Classifier: Programming Language :: Python :: Implementation :: CPython
+Classifier: Programming Language :: Python :: Implementation :: PyPy
+Requires-Python: >=3.7
+License-File: LICENSE.txt
+
+pip - The Python Package Installer
+==================================
+
+.. image:: https://img.shields.io/pypi/v/pip.svg
+   :target: https://pypi.org/project/pip/
+
+.. image:: https://readthedocs.org/projects/pip/badge/?version=latest
+   :target: https://pip.pypa.io/en/latest
+
+pip is the `package installer`_ for Python. You can use pip to install packages from the `Python Package Index`_ and other indexes.
+
+Please take a look at our documentation for how to install and use pip:
+
+* `Installation`_
+* `Usage`_
+
+We release updates regularly, with a new version every 3 months. Find more details in our documentation:
+
+* `Release notes`_
+* `Release process`_
+
+In pip 20.3, we've `made a big improvement to the heart of pip`_; `learn more`_. We want your input, so `sign up for our user experience research studies`_ to help us do it right.
+
+**Note**: pip 21.0, in January 2021, removed Python 2 support, per pip's `Python 2 support policy`_. Please migrate to Python 3.
+
+If you find bugs, need help, or want to talk to the developers, please use our mailing lists or chat rooms:
+
+* `Issue tracking`_
+* `Discourse channel`_
+* `User IRC`_
+
+If you want to get involved head over to GitHub to get the source code, look at our development documentation and feel free to jump on the developer mailing lists and chat rooms:
+
+* `GitHub page`_
+* `Development documentation`_
+* `Development IRC`_
+
+Code of Conduct
+---------------
+
+Everyone interacting in the pip project's codebases, issue trackers, chat
+rooms, and mailing lists is expected to follow the `PSF Code of Conduct`_.
+
+.. _package installer: https://packaging.python.org/guides/tool-recommendations/
+.. _Python Package Index: https://pypi.org
+.. _Installation: https://pip.pypa.io/en/stable/installation/
+.. _Usage: https://pip.pypa.io/en/stable/
+.. _Release notes: https://pip.pypa.io/en/stable/news.html
+.. _Release process: https://pip.pypa.io/en/latest/development/release-process/
+.. _GitHub page: https://github.com/pypa/pip
+.. _Development documentation: https://pip.pypa.io/en/latest/development
+.. _made a big improvement to the heart of pip: https://pyfound.blogspot.com/2020/11/pip-20-3-new-resolver.html
+.. _learn more: https://pip.pypa.io/en/latest/user_guide/#changes-to-the-pip-dependency-resolver-in-20-3-2020
+.. _sign up for our user experience research studies: https://pyfound.blogspot.com/2020/03/new-pip-resolver-to-roll-out-this-year.html
+.. _Python 2 support policy: https://pip.pypa.io/en/latest/development/release-process/#python-2-support
+.. _Issue tracking: https://github.com/pypa/pip/issues
+.. _Discourse channel: https://discuss.python.org/c/packaging
+.. _User IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa
+.. _Development IRC: https://kiwiirc.com/nextclient/#ircs://irc.libera.chat:+6697/pypa-dev
+.. _PSF Code of Conduct: https://github.com/pypa/.github/blob/main/CODE_OF_CONDUCT.md
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/RECORD b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/RECORD
new file mode 100644
index 0000000..ba0a0f2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/RECORD
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diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/REQUESTED b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/REQUESTED
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/REQUESTED
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/WHEEL b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/WHEEL
new file mode 100644
index 0000000..becc9a6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/WHEEL
@@ -0,0 +1,5 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.37.1)
+Root-Is-Purelib: true
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/entry_points.txt b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/entry_points.txt
new file mode 100644
index 0000000..5367846
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/entry_points.txt
@@ -0,0 +1,4 @@
+[console_scripts]
+pip = pip._internal.cli.main:main
+pip3 = pip._internal.cli.main:main
+pip3.10 = pip._internal.cli.main:main
diff --git a/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/top_level.txt
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip-22.3.1.dist-info/top_level.txt
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/pip/__init__.py b/venv/lib/python3.9/site-packages/pip/__init__.py
new file mode 100644
index 0000000..5563b5d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__init__.py
@@ -0,0 +1,13 @@
+from typing import List, Optional
+
+__version__ = "22.3.1"
+
+
+def main(args: Optional[List[str]] = None) -> int:
+    """This is an internal API only meant for use by pip's own console scripts.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/venv/lib/python3.9/site-packages/pip/__main__.py b/venv/lib/python3.9/site-packages/pip/__main__.py
new file mode 100644
index 0000000..fe34a7b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__main__.py
@@ -0,0 +1,31 @@
+import os
+import sys
+import warnings
+
+# Remove '' and current working directory from the first entry
+# of sys.path, if present to avoid using current directory
+# in pip commands check, freeze, install, list and show,
+# when invoked as python -m pip <command>
+if sys.path[0] in ("", os.getcwd()):
+    sys.path.pop(0)
+
+# If we are running from a wheel, add the wheel to sys.path
+# This allows the usage python pip-*.whl/pip install pip-*.whl
+if __package__ == "":
+    # __file__ is pip-*.whl/pip/__main__.py
+    # first dirname call strips of '/__main__.py', second strips off '/pip'
+    # Resulting path is the name of the wheel itself
+    # Add that to sys.path so we can import pip
+    path = os.path.dirname(os.path.dirname(__file__))
+    sys.path.insert(0, path)
+
+if __name__ == "__main__":
+    # Work around the error reported in #9540, pending a proper fix.
+    # Note: It is essential the warning filter is set *before* importing
+    #       pip, as the deprecation happens at import time, not runtime.
+    warnings.filterwarnings(
+        "ignore", category=DeprecationWarning, module=".*packaging\\.version"
+    )
+    from pip._internal.cli.main import main as _main
+
+    sys.exit(_main())
diff --git a/venv/lib/python3.9/site-packages/pip/__pip-runner__.py b/venv/lib/python3.9/site-packages/pip/__pip-runner__.py
new file mode 100644
index 0000000..49a148a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__pip-runner__.py
@@ -0,0 +1,50 @@
+"""Execute exactly this copy of pip, within a different environment.
+
+This file is named as it is, to ensure that this module can't be imported via
+an import statement.
+"""
+
+# /!\ This version compatibility check section must be Python 2 compatible. /!\
+
+import sys
+
+# Copied from setup.py
+PYTHON_REQUIRES = (3, 7)
+
+
+def version_str(version):  # type: ignore
+    return ".".join(str(v) for v in version)
+
+
+if sys.version_info[:2] < PYTHON_REQUIRES:
+    raise SystemExit(
+        "This version of pip does not support python {} (requires >={}).".format(
+            version_str(sys.version_info[:2]), version_str(PYTHON_REQUIRES)
+        )
+    )
+
+# From here on, we can use Python 3 features, but the syntax must remain
+# Python 2 compatible.
+
+import runpy  # noqa: E402
+from importlib.machinery import PathFinder  # noqa: E402
+from os.path import dirname  # noqa: E402
+
+PIP_SOURCES_ROOT = dirname(dirname(__file__))
+
+
+class PipImportRedirectingFinder:
+    @classmethod
+    def find_spec(self, fullname, path=None, target=None):  # type: ignore
+        if fullname != "pip":
+            return None
+
+        spec = PathFinder.find_spec(fullname, [PIP_SOURCES_ROOT], target)
+        assert spec, (PIP_SOURCES_ROOT, fullname)
+        return spec
+
+
+sys.meta_path.insert(0, PipImportRedirectingFinder())
+
+assert __name__ == "__main__", "Cannot run __pip-runner__.py as a non-main module"
+runpy.run_module("pip", run_name="__main__", alter_sys=True)
diff --git a/venv/lib/python3.9/site-packages/pip/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..0e26201
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/__pycache__/__main__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/__pycache__/__main__.cpython-39.pyc
new file mode 100644
index 0000000..d474dfb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__pycache__/__main__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/__pycache__/__pip-runner__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/__pycache__/__pip-runner__.cpython-39.pyc
new file mode 100644
index 0000000..dff8808
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/__pycache__/__pip-runner__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/__init__.py
new file mode 100644
index 0000000..6afb5c6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/__init__.py
@@ -0,0 +1,19 @@
+from typing import List, Optional
+
+import pip._internal.utils.inject_securetransport  # noqa
+from pip._internal.utils import _log
+
+# init_logging() must be called before any call to logging.getLogger()
+# which happens at import of most modules.
+_log.init_logging()
+
+
+def main(args: (Optional[List[str]]) = None) -> int:
+    """This is preserved for old console scripts that may still be referencing
+    it.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..10f5e29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/build_env.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/build_env.cpython-39.pyc
new file mode 100644
index 0000000..0a2196f
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/build_env.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/cache.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/cache.cpython-39.pyc
new file mode 100644
index 0000000..b471dd6
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/cache.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/configuration.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/configuration.cpython-39.pyc
new file mode 100644
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new file mode 100644
index 0000000..7dcca48
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/exceptions.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/main.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/main.cpython-39.pyc
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index 0000000..456b0aa
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/pyproject.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/pyproject.cpython-39.pyc
new file mode 100644
index 0000000..01eee74
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/pyproject.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/self_outdated_check.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/self_outdated_check.cpython-39.pyc
new file mode 100644
index 0000000..fa6ead0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/self_outdated_check.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/wheel_builder.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/wheel_builder.cpython-39.pyc
new file mode 100644
index 0000000..e5519ca
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/__pycache__/wheel_builder.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/build_env.py b/venv/lib/python3.9/site-packages/pip/_internal/build_env.py
new file mode 100644
index 0000000..cc2b38b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/build_env.py
@@ -0,0 +1,310 @@
+"""Build Environment used for isolation during sdist building
+"""
+
+import logging
+import os
+import pathlib
+import site
+import sys
+import textwrap
+from collections import OrderedDict
+from sysconfig import get_paths
+from types import TracebackType
+from typing import TYPE_CHECKING, Iterable, List, Optional, Set, Tuple, Type
+
+from pip._vendor.certifi import where
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.version import Version
+
+from pip import __file__ as pip_location
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.locations import get_platlib, get_prefixed_libs, get_purelib
+from pip._internal.metadata import get_default_environment, get_environment
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+
+if TYPE_CHECKING:
+    from pip._internal.index.package_finder import PackageFinder
+
+logger = logging.getLogger(__name__)
+
+
+class _Prefix:
+    def __init__(self, path: str) -> None:
+        self.path = path
+        self.setup = False
+        self.bin_dir = get_paths(
+            "nt" if os.name == "nt" else "posix_prefix",
+            vars={"base": path, "platbase": path},
+        )["scripts"]
+        self.lib_dirs = get_prefixed_libs(path)
+
+
+def get_runnable_pip() -> str:
+    """Get a file to pass to a Python executable, to run the currently-running pip.
+
+    This is used to run a pip subprocess, for installing requirements into the build
+    environment.
+    """
+    source = pathlib.Path(pip_location).resolve().parent
+
+    if not source.is_dir():
+        # This would happen if someone is using pip from inside a zip file. In that
+        # case, we can use that directly.
+        return str(source)
+
+    return os.fsdecode(source / "__pip-runner__.py")
+
+
+def _get_system_sitepackages() -> Set[str]:
+    """Get system site packages
+
+    Usually from site.getsitepackages,
+    but fallback on `get_purelib()/get_platlib()` if unavailable
+    (e.g. in a virtualenv created by virtualenv<20)
+
+    Returns normalized set of strings.
+    """
+    if hasattr(site, "getsitepackages"):
+        system_sites = site.getsitepackages()
+    else:
+        # virtualenv < 20 overwrites site.py without getsitepackages
+        # fallback on get_purelib/get_platlib.
+        # this is known to miss things, but shouldn't in the cases
+        # where getsitepackages() has been removed (inside a virtualenv)
+        system_sites = [get_purelib(), get_platlib()]
+    return {os.path.normcase(path) for path in system_sites}
+
+
+class BuildEnvironment:
+    """Creates and manages an isolated environment to install build deps"""
+
+    def __init__(self) -> None:
+        temp_dir = TempDirectory(kind=tempdir_kinds.BUILD_ENV, globally_managed=True)
+
+        self._prefixes = OrderedDict(
+            (name, _Prefix(os.path.join(temp_dir.path, name)))
+            for name in ("normal", "overlay")
+        )
+
+        self._bin_dirs: List[str] = []
+        self._lib_dirs: List[str] = []
+        for prefix in reversed(list(self._prefixes.values())):
+            self._bin_dirs.append(prefix.bin_dir)
+            self._lib_dirs.extend(prefix.lib_dirs)
+
+        # Customize site to:
+        # - ensure .pth files are honored
+        # - prevent access to system site packages
+        system_sites = _get_system_sitepackages()
+
+        self._site_dir = os.path.join(temp_dir.path, "site")
+        if not os.path.exists(self._site_dir):
+            os.mkdir(self._site_dir)
+        with open(
+            os.path.join(self._site_dir, "sitecustomize.py"), "w", encoding="utf-8"
+        ) as fp:
+            fp.write(
+                textwrap.dedent(
+                    """
+                import os, site, sys
+
+                # First, drop system-sites related paths.
+                original_sys_path = sys.path[:]
+                known_paths = set()
+                for path in {system_sites!r}:
+                    site.addsitedir(path, known_paths=known_paths)
+                system_paths = set(
+                    os.path.normcase(path)
+                    for path in sys.path[len(original_sys_path):]
+                )
+                original_sys_path = [
+                    path for path in original_sys_path
+                    if os.path.normcase(path) not in system_paths
+                ]
+                sys.path = original_sys_path
+
+                # Second, add lib directories.
+                # ensuring .pth file are processed.
+                for path in {lib_dirs!r}:
+                    assert not path in sys.path
+                    site.addsitedir(path)
+                """
+                ).format(system_sites=system_sites, lib_dirs=self._lib_dirs)
+            )
+
+    def __enter__(self) -> None:
+        self._save_env = {
+            name: os.environ.get(name, None)
+            for name in ("PATH", "PYTHONNOUSERSITE", "PYTHONPATH")
+        }
+
+        path = self._bin_dirs[:]
+        old_path = self._save_env["PATH"]
+        if old_path:
+            path.extend(old_path.split(os.pathsep))
+
+        pythonpath = [self._site_dir]
+
+        os.environ.update(
+            {
+                "PATH": os.pathsep.join(path),
+                "PYTHONNOUSERSITE": "1",
+                "PYTHONPATH": os.pathsep.join(pythonpath),
+            }
+        )
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        for varname, old_value in self._save_env.items():
+            if old_value is None:
+                os.environ.pop(varname, None)
+            else:
+                os.environ[varname] = old_value
+
+    def check_requirements(
+        self, reqs: Iterable[str]
+    ) -> Tuple[Set[Tuple[str, str]], Set[str]]:
+        """Return 2 sets:
+        - conflicting requirements: set of (installed, wanted) reqs tuples
+        - missing requirements: set of reqs
+        """
+        missing = set()
+        conflicting = set()
+        if reqs:
+            env = (
+                get_environment(self._lib_dirs)
+                if hasattr(self, "_lib_dirs")
+                else get_default_environment()
+            )
+            for req_str in reqs:
+                req = Requirement(req_str)
+                # We're explicitly evaluating with an empty extra value, since build
+                # environments are not provided any mechanism to select specific extras.
+                if req.marker is not None and not req.marker.evaluate({"extra": ""}):
+                    continue
+                dist = env.get_distribution(req.name)
+                if not dist:
+                    missing.add(req_str)
+                    continue
+                if isinstance(dist.version, Version):
+                    installed_req_str = f"{req.name}=={dist.version}"
+                else:
+                    installed_req_str = f"{req.name}==={dist.version}"
+                if not req.specifier.contains(dist.version, prereleases=True):
+                    conflicting.add((installed_req_str, req_str))
+                # FIXME: Consider direct URL?
+        return conflicting, missing
+
+    def install_requirements(
+        self,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
+        prefix = self._prefixes[prefix_as_string]
+        assert not prefix.setup
+        prefix.setup = True
+        if not requirements:
+            return
+        self._install_requirements(
+            get_runnable_pip(),
+            finder,
+            requirements,
+            prefix,
+            kind=kind,
+        )
+
+    @staticmethod
+    def _install_requirements(
+        pip_runnable: str,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix: _Prefix,
+        *,
+        kind: str,
+    ) -> None:
+        args: List[str] = [
+            sys.executable,
+            pip_runnable,
+            "install",
+            "--ignore-installed",
+            "--no-user",
+            "--prefix",
+            prefix.path,
+            "--no-warn-script-location",
+        ]
+        if logger.getEffectiveLevel() <= logging.DEBUG:
+            args.append("-v")
+        for format_control in ("no_binary", "only_binary"):
+            formats = getattr(finder.format_control, format_control)
+            args.extend(
+                (
+                    "--" + format_control.replace("_", "-"),
+                    ",".join(sorted(formats or {":none:"})),
+                )
+            )
+
+        index_urls = finder.index_urls
+        if index_urls:
+            args.extend(["-i", index_urls[0]])
+            for extra_index in index_urls[1:]:
+                args.extend(["--extra-index-url", extra_index])
+        else:
+            args.append("--no-index")
+        for link in finder.find_links:
+            args.extend(["--find-links", link])
+
+        for host in finder.trusted_hosts:
+            args.extend(["--trusted-host", host])
+        if finder.allow_all_prereleases:
+            args.append("--pre")
+        if finder.prefer_binary:
+            args.append("--prefer-binary")
+        args.append("--")
+        args.extend(requirements)
+        extra_environ = {"_PIP_STANDALONE_CERT": where()}
+        with open_spinner(f"Installing {kind}") as spinner:
+            call_subprocess(
+                args,
+                command_desc=f"pip subprocess to install {kind}",
+                spinner=spinner,
+                extra_environ=extra_environ,
+            )
+
+
+class NoOpBuildEnvironment(BuildEnvironment):
+    """A no-op drop-in replacement for BuildEnvironment"""
+
+    def __init__(self) -> None:
+        pass
+
+    def __enter__(self) -> None:
+        pass
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        pass
+
+    def cleanup(self) -> None:
+        pass
+
+    def install_requirements(
+        self,
+        finder: "PackageFinder",
+        requirements: Iterable[str],
+        prefix_as_string: str,
+        *,
+        kind: str,
+    ) -> None:
+        raise NotImplementedError()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cache.py b/venv/lib/python3.9/site-packages/pip/_internal/cache.py
new file mode 100644
index 0000000..c53b7f0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cache.py
@@ -0,0 +1,293 @@
+"""Cache Management
+"""
+
+import hashlib
+import json
+import logging
+import os
+from pathlib import Path
+from typing import Any, Dict, List, Optional, Set
+
+from pip._vendor.packaging.tags import Tag, interpreter_name, interpreter_version
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import InvalidWheelFilename
+from pip._internal.models.direct_url import DirectUrl
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.urls import path_to_url
+
+logger = logging.getLogger(__name__)
+
+ORIGIN_JSON_NAME = "origin.json"
+
+
+def _hash_dict(d: Dict[str, str]) -> str:
+    """Return a stable sha224 of a dictionary."""
+    s = json.dumps(d, sort_keys=True, separators=(",", ":"), ensure_ascii=True)
+    return hashlib.sha224(s.encode("ascii")).hexdigest()
+
+
+class Cache:
+    """An abstract class - provides cache directories for data from links
+
+
+    :param cache_dir: The root of the cache.
+    :param format_control: An object of FormatControl class to limit
+        binaries being read from the cache.
+    :param allowed_formats: which formats of files the cache should store.
+        ('binary' and 'source' are the only allowed values)
+    """
+
+    def __init__(
+        self, cache_dir: str, format_control: FormatControl, allowed_formats: Set[str]
+    ) -> None:
+        super().__init__()
+        assert not cache_dir or os.path.isabs(cache_dir)
+        self.cache_dir = cache_dir or None
+        self.format_control = format_control
+        self.allowed_formats = allowed_formats
+
+        _valid_formats = {"source", "binary"}
+        assert self.allowed_formats.union(_valid_formats) == _valid_formats
+
+    def _get_cache_path_parts(self, link: Link) -> List[str]:
+        """Get parts of part that must be os.path.joined with cache_dir"""
+
+        # We want to generate an url to use as our cache key, we don't want to
+        # just re-use the URL because it might have other items in the fragment
+        # and we don't care about those.
+        key_parts = {"url": link.url_without_fragment}
+        if link.hash_name is not None and link.hash is not None:
+            key_parts[link.hash_name] = link.hash
+        if link.subdirectory_fragment:
+            key_parts["subdirectory"] = link.subdirectory_fragment
+
+        # Include interpreter name, major and minor version in cache key
+        # to cope with ill-behaved sdists that build a different wheel
+        # depending on the python version their setup.py is being run on,
+        # and don't encode the difference in compatibility tags.
+        # https://github.com/pypa/pip/issues/7296
+        key_parts["interpreter_name"] = interpreter_name()
+        key_parts["interpreter_version"] = interpreter_version()
+
+        # Encode our key url with sha224, we'll use this because it has similar
+        # security properties to sha256, but with a shorter total output (and
+        # thus less secure). However the differences don't make a lot of
+        # difference for our use case here.
+        hashed = _hash_dict(key_parts)
+
+        # We want to nest the directories some to prevent having a ton of top
+        # level directories where we might run out of sub directories on some
+        # FS.
+        parts = [hashed[:2], hashed[2:4], hashed[4:6], hashed[6:]]
+
+        return parts
+
+    def _get_candidates(self, link: Link, canonical_package_name: str) -> List[Any]:
+        can_not_cache = not self.cache_dir or not canonical_package_name or not link
+        if can_not_cache:
+            return []
+
+        formats = self.format_control.get_allowed_formats(canonical_package_name)
+        if not self.allowed_formats.intersection(formats):
+            return []
+
+        candidates = []
+        path = self.get_path_for_link(link)
+        if os.path.isdir(path):
+            for candidate in os.listdir(path):
+                candidates.append((candidate, path))
+        return candidates
+
+    def get_path_for_link(self, link: Link) -> str:
+        """Return a directory to store cached items in for link."""
+        raise NotImplementedError()
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        """Returns a link to a cached item if it exists, otherwise returns the
+        passed link.
+        """
+        raise NotImplementedError()
+
+
+class SimpleWheelCache(Cache):
+    """A cache of wheels for future installs."""
+
+    def __init__(self, cache_dir: str, format_control: FormatControl) -> None:
+        super().__init__(cache_dir, format_control, {"binary"})
+
+    def get_path_for_link(self, link: Link) -> str:
+        """Return a directory to store cached wheels for link
+
+        Because there are M wheels for any one sdist, we provide a directory
+        to cache them in, and then consult that directory when looking up
+        cache hits.
+
+        We only insert things into the cache if they have plausible version
+        numbers, so that we don't contaminate the cache with things that were
+        not unique. E.g. ./package might have dozens of installs done for it
+        and build a version of 0.0...and if we built and cached a wheel, we'd
+        end up using the same wheel even if the source has been edited.
+
+        :param link: The link of the sdist for which this will cache wheels.
+        """
+        parts = self._get_cache_path_parts(link)
+        assert self.cache_dir
+        # Store wheels within the root cache_dir
+        return os.path.join(self.cache_dir, "wheels", *parts)
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        candidates = []
+
+        if not package_name:
+            return link
+
+        canonical_package_name = canonicalize_name(package_name)
+        for wheel_name, wheel_dir in self._get_candidates(link, canonical_package_name):
+            try:
+                wheel = Wheel(wheel_name)
+            except InvalidWheelFilename:
+                continue
+            if canonicalize_name(wheel.name) != canonical_package_name:
+                logger.debug(
+                    "Ignoring cached wheel %s for %s as it "
+                    "does not match the expected distribution name %s.",
+                    wheel_name,
+                    link,
+                    package_name,
+                )
+                continue
+            if not wheel.supported(supported_tags):
+                # Built for a different python/arch/etc
+                continue
+            candidates.append(
+                (
+                    wheel.support_index_min(supported_tags),
+                    wheel_name,
+                    wheel_dir,
+                )
+            )
+
+        if not candidates:
+            return link
+
+        _, wheel_name, wheel_dir = min(candidates)
+        return Link(path_to_url(os.path.join(wheel_dir, wheel_name)))
+
+
+class EphemWheelCache(SimpleWheelCache):
+    """A SimpleWheelCache that creates it's own temporary cache directory"""
+
+    def __init__(self, format_control: FormatControl) -> None:
+        self._temp_dir = TempDirectory(
+            kind=tempdir_kinds.EPHEM_WHEEL_CACHE,
+            globally_managed=True,
+        )
+
+        super().__init__(self._temp_dir.path, format_control)
+
+
+class CacheEntry:
+    def __init__(
+        self,
+        link: Link,
+        persistent: bool,
+    ):
+        self.link = link
+        self.persistent = persistent
+        self.origin: Optional[DirectUrl] = None
+        origin_direct_url_path = Path(self.link.file_path).parent / ORIGIN_JSON_NAME
+        if origin_direct_url_path.exists():
+            self.origin = DirectUrl.from_json(origin_direct_url_path.read_text())
+
+
+class WheelCache(Cache):
+    """Wraps EphemWheelCache and SimpleWheelCache into a single Cache
+
+    This Cache allows for gracefully degradation, using the ephem wheel cache
+    when a certain link is not found in the simple wheel cache first.
+    """
+
+    def __init__(
+        self, cache_dir: str, format_control: Optional[FormatControl] = None
+    ) -> None:
+        if format_control is None:
+            format_control = FormatControl()
+        super().__init__(cache_dir, format_control, {"binary"})
+        self._wheel_cache = SimpleWheelCache(cache_dir, format_control)
+        self._ephem_cache = EphemWheelCache(format_control)
+
+    def get_path_for_link(self, link: Link) -> str:
+        return self._wheel_cache.get_path_for_link(link)
+
+    def get_ephem_path_for_link(self, link: Link) -> str:
+        return self._ephem_cache.get_path_for_link(link)
+
+    def get(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Link:
+        cache_entry = self.get_cache_entry(link, package_name, supported_tags)
+        if cache_entry is None:
+            return link
+        return cache_entry.link
+
+    def get_cache_entry(
+        self,
+        link: Link,
+        package_name: Optional[str],
+        supported_tags: List[Tag],
+    ) -> Optional[CacheEntry]:
+        """Returns a CacheEntry with a link to a cached item if it exists or
+        None. The cache entry indicates if the item was found in the persistent
+        or ephemeral cache.
+        """
+        retval = self._wheel_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=True)
+
+        retval = self._ephem_cache.get(
+            link=link,
+            package_name=package_name,
+            supported_tags=supported_tags,
+        )
+        if retval is not link:
+            return CacheEntry(retval, persistent=False)
+
+        return None
+
+    @staticmethod
+    def record_download_origin(cache_dir: str, download_info: DirectUrl) -> None:
+        origin_path = Path(cache_dir) / ORIGIN_JSON_NAME
+        if origin_path.is_file():
+            origin = DirectUrl.from_json(origin_path.read_text())
+            # TODO: use DirectUrl.equivalent when https://github.com/pypa/pip/pull/10564
+            # is merged.
+            if origin.url != download_info.url:
+                logger.warning(
+                    "Origin URL %s in cache entry %s does not match download URL %s. "
+                    "This is likely a pip bug or a cache corruption issue.",
+                    origin.url,
+                    cache_dir,
+                    download_info.url,
+                )
+        origin_path.write_text(download_info.to_json(), encoding="utf-8")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/__init__.py
new file mode 100644
index 0000000..e589bb9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/__init__.py
@@ -0,0 +1,4 @@
+"""Subpackage containing all of pip's command line interface related code
+"""
+
+# This file intentionally does not import submodules
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/autocompletion.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/autocompletion.py
new file mode 100644
index 0000000..226fe84
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/autocompletion.py
@@ -0,0 +1,171 @@
+"""Logic that powers autocompletion installed by ``pip completion``.
+"""
+
+import optparse
+import os
+import sys
+from itertools import chain
+from typing import Any, Iterable, List, Optional
+
+from pip._internal.cli.main_parser import create_main_parser
+from pip._internal.commands import commands_dict, create_command
+from pip._internal.metadata import get_default_environment
+
+
+def autocomplete() -> None:
+    """Entry Point for completion of main and subcommand options."""
+    # Don't complete if user hasn't sourced bash_completion file.
+    if "PIP_AUTO_COMPLETE" not in os.environ:
+        return
+    cwords = os.environ["COMP_WORDS"].split()[1:]
+    cword = int(os.environ["COMP_CWORD"])
+    try:
+        current = cwords[cword - 1]
+    except IndexError:
+        current = ""
+
+    parser = create_main_parser()
+    subcommands = list(commands_dict)
+    options = []
+
+    # subcommand
+    subcommand_name: Optional[str] = None
+    for word in cwords:
+        if word in subcommands:
+            subcommand_name = word
+            break
+    # subcommand options
+    if subcommand_name is not None:
+        # special case: 'help' subcommand has no options
+        if subcommand_name == "help":
+            sys.exit(1)
+        # special case: list locally installed dists for show and uninstall
+        should_list_installed = not current.startswith("-") and subcommand_name in [
+            "show",
+            "uninstall",
+        ]
+        if should_list_installed:
+            env = get_default_environment()
+            lc = current.lower()
+            installed = [
+                dist.canonical_name
+                for dist in env.iter_installed_distributions(local_only=True)
+                if dist.canonical_name.startswith(lc)
+                and dist.canonical_name not in cwords[1:]
+            ]
+            # if there are no dists installed, fall back to option completion
+            if installed:
+                for dist in installed:
+                    print(dist)
+                sys.exit(1)
+
+        should_list_installables = (
+            not current.startswith("-") and subcommand_name == "install"
+        )
+        if should_list_installables:
+            for path in auto_complete_paths(current, "path"):
+                print(path)
+            sys.exit(1)
+
+        subcommand = create_command(subcommand_name)
+
+        for opt in subcommand.parser.option_list_all:
+            if opt.help != optparse.SUPPRESS_HELP:
+                for opt_str in opt._long_opts + opt._short_opts:
+                    options.append((opt_str, opt.nargs))
+
+        # filter out previously specified options from available options
+        prev_opts = [x.split("=")[0] for x in cwords[1 : cword - 1]]
+        options = [(x, v) for (x, v) in options if x not in prev_opts]
+        # filter options by current input
+        options = [(k, v) for k, v in options if k.startswith(current)]
+        # get completion type given cwords and available subcommand options
+        completion_type = get_path_completion_type(
+            cwords,
+            cword,
+            subcommand.parser.option_list_all,
+        )
+        # get completion files and directories if ``completion_type`` is
+        # ``<file>``, ``<dir>`` or ``<path>``
+        if completion_type:
+            paths = auto_complete_paths(current, completion_type)
+            options = [(path, 0) for path in paths]
+        for option in options:
+            opt_label = option[0]
+            # append '=' to options which require args
+            if option[1] and option[0][:2] == "--":
+                opt_label += "="
+            print(opt_label)
+    else:
+        # show main parser options only when necessary
+
+        opts = [i.option_list for i in parser.option_groups]
+        opts.append(parser.option_list)
+        flattened_opts = chain.from_iterable(opts)
+        if current.startswith("-"):
+            for opt in flattened_opts:
+                if opt.help != optparse.SUPPRESS_HELP:
+                    subcommands += opt._long_opts + opt._short_opts
+        else:
+            # get completion type given cwords and all available options
+            completion_type = get_path_completion_type(cwords, cword, flattened_opts)
+            if completion_type:
+                subcommands = list(auto_complete_paths(current, completion_type))
+
+        print(" ".join([x for x in subcommands if x.startswith(current)]))
+    sys.exit(1)
+
+
+def get_path_completion_type(
+    cwords: List[str], cword: int, opts: Iterable[Any]
+) -> Optional[str]:
+    """Get the type of path completion (``file``, ``dir``, ``path`` or None)
+
+    :param cwords: same as the environmental variable ``COMP_WORDS``
+    :param cword: same as the environmental variable ``COMP_CWORD``
+    :param opts: The available options to check
+    :return: path completion type (``file``, ``dir``, ``path`` or None)
+    """
+    if cword < 2 or not cwords[cword - 2].startswith("-"):
+        return None
+    for opt in opts:
+        if opt.help == optparse.SUPPRESS_HELP:
+            continue
+        for o in str(opt).split("/"):
+            if cwords[cword - 2].split("=")[0] == o:
+                if not opt.metavar or any(
+                    x in ("path", "file", "dir") for x in opt.metavar.split("/")
+                ):
+                    return opt.metavar
+    return None
+
+
+def auto_complete_paths(current: str, completion_type: str) -> Iterable[str]:
+    """If ``completion_type`` is ``file`` or ``path``, list all regular files
+    and directories starting with ``current``; otherwise only list directories
+    starting with ``current``.
+
+    :param current: The word to be completed
+    :param completion_type: path completion type(``file``, ``path`` or ``dir``)
+    :return: A generator of regular files and/or directories
+    """
+    directory, filename = os.path.split(current)
+    current_path = os.path.abspath(directory)
+    # Don't complete paths if they can't be accessed
+    if not os.access(current_path, os.R_OK):
+        return
+    filename = os.path.normcase(filename)
+    # list all files that start with ``filename``
+    file_list = (
+        x for x in os.listdir(current_path) if os.path.normcase(x).startswith(filename)
+    )
+    for f in file_list:
+        opt = os.path.join(current_path, f)
+        comp_file = os.path.normcase(os.path.join(directory, f))
+        # complete regular files when there is not ``<dir>`` after option
+        # complete directories when there is ``<file>``, ``<path>`` or
+        # ``<dir>``after option
+        if completion_type != "dir" and os.path.isfile(opt):
+            yield comp_file
+        elif os.path.isdir(opt):
+            yield os.path.join(comp_file, "")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/base_command.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/base_command.py
new file mode 100644
index 0000000..5bd7e67
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/base_command.py
@@ -0,0 +1,216 @@
+"""Base Command class, and related routines"""
+
+import functools
+import logging
+import logging.config
+import optparse
+import os
+import sys
+import traceback
+from optparse import Values
+from typing import Any, Callable, List, Optional, Tuple
+
+from pip._vendor.rich import traceback as rich_traceback
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
+from pip._internal.cli.status_codes import (
+    ERROR,
+    PREVIOUS_BUILD_DIR_ERROR,
+    UNKNOWN_ERROR,
+    VIRTUALENV_NOT_FOUND,
+)
+from pip._internal.exceptions import (
+    BadCommand,
+    CommandError,
+    DiagnosticPipError,
+    InstallationError,
+    NetworkConnectionError,
+    PreviousBuildDirError,
+    UninstallationError,
+)
+from pip._internal.utils.filesystem import check_path_owner
+from pip._internal.utils.logging import BrokenStdoutLoggingError, setup_logging
+from pip._internal.utils.misc import get_prog, normalize_path
+from pip._internal.utils.temp_dir import TempDirectoryTypeRegistry as TempDirRegistry
+from pip._internal.utils.temp_dir import global_tempdir_manager, tempdir_registry
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+__all__ = ["Command"]
+
+logger = logging.getLogger(__name__)
+
+
+class Command(CommandContextMixIn):
+    usage: str = ""
+    ignore_require_venv: bool = False
+
+    def __init__(self, name: str, summary: str, isolated: bool = False) -> None:
+        super().__init__()
+
+        self.name = name
+        self.summary = summary
+        self.parser = ConfigOptionParser(
+            usage=self.usage,
+            prog=f"{get_prog()} {name}",
+            formatter=UpdatingDefaultsHelpFormatter(),
+            add_help_option=False,
+            name=name,
+            description=self.__doc__,
+            isolated=isolated,
+        )
+
+        self.tempdir_registry: Optional[TempDirRegistry] = None
+
+        # Commands should add options to this option group
+        optgroup_name = f"{self.name.capitalize()} Options"
+        self.cmd_opts = optparse.OptionGroup(self.parser, optgroup_name)
+
+        # Add the general options
+        gen_opts = cmdoptions.make_option_group(
+            cmdoptions.general_group,
+            self.parser,
+        )
+        self.parser.add_option_group(gen_opts)
+
+        self.add_options()
+
+    def add_options(self) -> None:
+        pass
+
+    def handle_pip_version_check(self, options: Values) -> None:
+        """
+        This is a no-op so that commands by default do not do the pip version
+        check.
+        """
+        # Make sure we do the pip version check if the index_group options
+        # are present.
+        assert not hasattr(options, "no_index")
+
+    def run(self, options: Values, args: List[str]) -> int:
+        raise NotImplementedError
+
+    def parse_args(self, args: List[str]) -> Tuple[Values, List[str]]:
+        # factored out for testability
+        return self.parser.parse_args(args)
+
+    def main(self, args: List[str]) -> int:
+        try:
+            with self.main_context():
+                return self._main(args)
+        finally:
+            logging.shutdown()
+
+    def _main(self, args: List[str]) -> int:
+        # We must initialize this before the tempdir manager, otherwise the
+        # configuration would not be accessible by the time we clean up the
+        # tempdir manager.
+        self.tempdir_registry = self.enter_context(tempdir_registry())
+        # Intentionally set as early as possible so globally-managed temporary
+        # directories are available to the rest of the code.
+        self.enter_context(global_tempdir_manager())
+
+        options, args = self.parse_args(args)
+
+        # Set verbosity so that it can be used elsewhere.
+        self.verbosity = options.verbose - options.quiet
+
+        level_number = setup_logging(
+            verbosity=self.verbosity,
+            no_color=options.no_color,
+            user_log_file=options.log,
+        )
+
+        # TODO: Try to get these passing down from the command?
+        #       without resorting to os.environ to hold these.
+        #       This also affects isolated builds and it should.
+
+        if options.no_input:
+            os.environ["PIP_NO_INPUT"] = "1"
+
+        if options.exists_action:
+            os.environ["PIP_EXISTS_ACTION"] = " ".join(options.exists_action)
+
+        if options.require_venv and not self.ignore_require_venv:
+            # If a venv is required check if it can really be found
+            if not running_under_virtualenv():
+                logger.critical("Could not find an activated virtualenv (required).")
+                sys.exit(VIRTUALENV_NOT_FOUND)
+
+        if options.cache_dir:
+            options.cache_dir = normalize_path(options.cache_dir)
+            if not check_path_owner(options.cache_dir):
+                logger.warning(
+                    "The directory '%s' or its parent directory is not owned "
+                    "or is not writable by the current user. The cache "
+                    "has been disabled. Check the permissions and owner of "
+                    "that directory. If executing pip with sudo, you should "
+                    "use sudo's -H flag.",
+                    options.cache_dir,
+                )
+                options.cache_dir = None
+
+        def intercepts_unhandled_exc(
+            run_func: Callable[..., int]
+        ) -> Callable[..., int]:
+            @functools.wraps(run_func)
+            def exc_logging_wrapper(*args: Any) -> int:
+                try:
+                    status = run_func(*args)
+                    assert isinstance(status, int)
+                    return status
+                except DiagnosticPipError as exc:
+                    logger.error("[present-rich] %s", exc)
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except PreviousBuildDirError as exc:
+                    logger.critical(str(exc))
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return PREVIOUS_BUILD_DIR_ERROR
+                except (
+                    InstallationError,
+                    UninstallationError,
+                    BadCommand,
+                    NetworkConnectionError,
+                ) as exc:
+                    logger.critical(str(exc))
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except CommandError as exc:
+                    logger.critical("%s", exc)
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except BrokenStdoutLoggingError:
+                    # Bypass our logger and write any remaining messages to
+                    # stderr because stdout no longer works.
+                    print("ERROR: Pipe to stdout was broken", file=sys.stderr)
+                    if level_number <= logging.DEBUG:
+                        traceback.print_exc(file=sys.stderr)
+
+                    return ERROR
+                except KeyboardInterrupt:
+                    logger.critical("Operation cancelled by user")
+                    logger.debug("Exception information:", exc_info=True)
+
+                    return ERROR
+                except BaseException:
+                    logger.critical("Exception:", exc_info=True)
+
+                    return UNKNOWN_ERROR
+
+            return exc_logging_wrapper
+
+        try:
+            if not options.debug_mode:
+                run = intercepts_unhandled_exc(self.run)
+            else:
+                run = self.run
+                rich_traceback.install(show_locals=True)
+            return run(options, args)
+        finally:
+            self.handle_pip_version_check(options)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/cmdoptions.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/cmdoptions.py
new file mode 100644
index 0000000..b4e2560
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/cmdoptions.py
@@ -0,0 +1,1049 @@
+"""
+shared options and groups
+
+The principle here is to define options once, but *not* instantiate them
+globally. One reason being that options with action='append' can carry state
+between parses. pip parses general options twice internally, and shouldn't
+pass on state. To be consistent, all options will follow this design.
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import importlib.util
+import logging
+import os
+import textwrap
+from functools import partial
+from optparse import SUPPRESS_HELP, Option, OptionGroup, OptionParser, Values
+from textwrap import dedent
+from typing import Any, Callable, Dict, Optional, Tuple
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.parser import ConfigOptionParser
+from pip._internal.exceptions import CommandError
+from pip._internal.locations import USER_CACHE_DIR, get_src_prefix
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.index import PyPI
+from pip._internal.models.target_python import TargetPython
+from pip._internal.utils.hashes import STRONG_HASHES
+from pip._internal.utils.misc import strtobool
+
+logger = logging.getLogger(__name__)
+
+
+def raise_option_error(parser: OptionParser, option: Option, msg: str) -> None:
+    """
+    Raise an option parsing error using parser.error().
+
+    Args:
+      parser: an OptionParser instance.
+      option: an Option instance.
+      msg: the error text.
+    """
+    msg = f"{option} error: {msg}"
+    msg = textwrap.fill(" ".join(msg.split()))
+    parser.error(msg)
+
+
+def make_option_group(group: Dict[str, Any], parser: ConfigOptionParser) -> OptionGroup:
+    """
+    Return an OptionGroup object
+    group  -- assumed to be dict with 'name' and 'options' keys
+    parser -- an optparse Parser
+    """
+    option_group = OptionGroup(parser, group["name"])
+    for option in group["options"]:
+        option_group.add_option(option())
+    return option_group
+
+
+def check_dist_restriction(options: Values, check_target: bool = False) -> None:
+    """Function for determining if custom platform options are allowed.
+
+    :param options: The OptionParser options.
+    :param check_target: Whether or not to check if --target is being used.
+    """
+    dist_restriction_set = any(
+        [
+            options.python_version,
+            options.platforms,
+            options.abis,
+            options.implementation,
+        ]
+    )
+
+    binary_only = FormatControl(set(), {":all:"})
+    sdist_dependencies_allowed = (
+        options.format_control != binary_only and not options.ignore_dependencies
+    )
+
+    # Installations or downloads using dist restrictions must not combine
+    # source distributions and dist-specific wheels, as they are not
+    # guaranteed to be locally compatible.
+    if dist_restriction_set and sdist_dependencies_allowed:
+        raise CommandError(
+            "When restricting platform and interpreter constraints using "
+            "--python-version, --platform, --abi, or --implementation, "
+            "either --no-deps must be set, or --only-binary=:all: must be "
+            "set and --no-binary must not be set (or must be set to "
+            ":none:)."
+        )
+
+    if check_target:
+        if dist_restriction_set and not options.target_dir:
+            raise CommandError(
+                "Can not use any platform or abi specific options unless "
+                "installing via '--target'"
+            )
+
+
+def _path_option_check(option: Option, opt: str, value: str) -> str:
+    return os.path.expanduser(value)
+
+
+def _package_name_option_check(option: Option, opt: str, value: str) -> str:
+    return canonicalize_name(value)
+
+
+class PipOption(Option):
+    TYPES = Option.TYPES + ("path", "package_name")
+    TYPE_CHECKER = Option.TYPE_CHECKER.copy()
+    TYPE_CHECKER["package_name"] = _package_name_option_check
+    TYPE_CHECKER["path"] = _path_option_check
+
+
+###########
+# options #
+###########
+
+help_: Callable[..., Option] = partial(
+    Option,
+    "-h",
+    "--help",
+    dest="help",
+    action="help",
+    help="Show help.",
+)
+
+debug_mode: Callable[..., Option] = partial(
+    Option,
+    "--debug",
+    dest="debug_mode",
+    action="store_true",
+    default=False,
+    help=(
+        "Let unhandled exceptions propagate outside the main subroutine, "
+        "instead of logging them to stderr."
+    ),
+)
+
+isolated_mode: Callable[..., Option] = partial(
+    Option,
+    "--isolated",
+    dest="isolated_mode",
+    action="store_true",
+    default=False,
+    help=(
+        "Run pip in an isolated mode, ignoring environment variables and user "
+        "configuration."
+    ),
+)
+
+require_virtualenv: Callable[..., Option] = partial(
+    Option,
+    "--require-virtualenv",
+    "--require-venv",
+    dest="require_venv",
+    action="store_true",
+    default=False,
+    help=(
+        "Allow pip to only run in a virtual environment; "
+        "exit with an error otherwise."
+    ),
+)
+
+python: Callable[..., Option] = partial(
+    Option,
+    "--python",
+    dest="python",
+    help="Run pip with the specified Python interpreter.",
+)
+
+verbose: Callable[..., Option] = partial(
+    Option,
+    "-v",
+    "--verbose",
+    dest="verbose",
+    action="count",
+    default=0,
+    help="Give more output. Option is additive, and can be used up to 3 times.",
+)
+
+no_color: Callable[..., Option] = partial(
+    Option,
+    "--no-color",
+    dest="no_color",
+    action="store_true",
+    default=False,
+    help="Suppress colored output.",
+)
+
+version: Callable[..., Option] = partial(
+    Option,
+    "-V",
+    "--version",
+    dest="version",
+    action="store_true",
+    help="Show version and exit.",
+)
+
+quiet: Callable[..., Option] = partial(
+    Option,
+    "-q",
+    "--quiet",
+    dest="quiet",
+    action="count",
+    default=0,
+    help=(
+        "Give less output. Option is additive, and can be used up to 3"
+        " times (corresponding to WARNING, ERROR, and CRITICAL logging"
+        " levels)."
+    ),
+)
+
+progress_bar: Callable[..., Option] = partial(
+    Option,
+    "--progress-bar",
+    dest="progress_bar",
+    type="choice",
+    choices=["on", "off"],
+    default="on",
+    help="Specify whether the progress bar should be used [on, off] (default: on)",
+)
+
+log: Callable[..., Option] = partial(
+    PipOption,
+    "--log",
+    "--log-file",
+    "--local-log",
+    dest="log",
+    metavar="path",
+    type="path",
+    help="Path to a verbose appending log.",
+)
+
+no_input: Callable[..., Option] = partial(
+    Option,
+    # Don't ask for input
+    "--no-input",
+    dest="no_input",
+    action="store_true",
+    default=False,
+    help="Disable prompting for input.",
+)
+
+proxy: Callable[..., Option] = partial(
+    Option,
+    "--proxy",
+    dest="proxy",
+    type="str",
+    default="",
+    help="Specify a proxy in the form scheme://[user:passwd@]proxy.server:port.",
+)
+
+retries: Callable[..., Option] = partial(
+    Option,
+    "--retries",
+    dest="retries",
+    type="int",
+    default=5,
+    help="Maximum number of retries each connection should attempt "
+    "(default %default times).",
+)
+
+timeout: Callable[..., Option] = partial(
+    Option,
+    "--timeout",
+    "--default-timeout",
+    metavar="sec",
+    dest="timeout",
+    type="float",
+    default=15,
+    help="Set the socket timeout (default %default seconds).",
+)
+
+
+def exists_action() -> Option:
+    return Option(
+        # Option when path already exist
+        "--exists-action",
+        dest="exists_action",
+        type="choice",
+        choices=["s", "i", "w", "b", "a"],
+        default=[],
+        action="append",
+        metavar="action",
+        help="Default action when a path already exists: "
+        "(s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.",
+    )
+
+
+cert: Callable[..., Option] = partial(
+    PipOption,
+    "--cert",
+    dest="cert",
+    type="path",
+    metavar="path",
+    help=(
+        "Path to PEM-encoded CA certificate bundle. "
+        "If provided, overrides the default. "
+        "See 'SSL Certificate Verification' in pip documentation "
+        "for more information."
+    ),
+)
+
+client_cert: Callable[..., Option] = partial(
+    PipOption,
+    "--client-cert",
+    dest="client_cert",
+    type="path",
+    default=None,
+    metavar="path",
+    help="Path to SSL client certificate, a single file containing the "
+    "private key and the certificate in PEM format.",
+)
+
+index_url: Callable[..., Option] = partial(
+    Option,
+    "-i",
+    "--index-url",
+    "--pypi-url",
+    dest="index_url",
+    metavar="URL",
+    default=PyPI.simple_url,
+    help="Base URL of the Python Package Index (default %default). "
+    "This should point to a repository compliant with PEP 503 "
+    "(the simple repository API) or a local directory laid out "
+    "in the same format.",
+)
+
+
+def extra_index_url() -> Option:
+    return Option(
+        "--extra-index-url",
+        dest="extra_index_urls",
+        metavar="URL",
+        action="append",
+        default=[],
+        help="Extra URLs of package indexes to use in addition to "
+        "--index-url. Should follow the same rules as "
+        "--index-url.",
+    )
+
+
+no_index: Callable[..., Option] = partial(
+    Option,
+    "--no-index",
+    dest="no_index",
+    action="store_true",
+    default=False,
+    help="Ignore package index (only looking at --find-links URLs instead).",
+)
+
+
+def find_links() -> Option:
+    return Option(
+        "-f",
+        "--find-links",
+        dest="find_links",
+        action="append",
+        default=[],
+        metavar="url",
+        help="If a URL or path to an html file, then parse for links to "
+        "archives such as sdist (.tar.gz) or wheel (.whl) files. "
+        "If a local path or file:// URL that's a directory, "
+        "then look for archives in the directory listing. "
+        "Links to VCS project URLs are not supported.",
+    )
+
+
+def trusted_host() -> Option:
+    return Option(
+        "--trusted-host",
+        dest="trusted_hosts",
+        action="append",
+        metavar="HOSTNAME",
+        default=[],
+        help="Mark this host or host:port pair as trusted, even though it "
+        "does not have valid or any HTTPS.",
+    )
+
+
+def constraints() -> Option:
+    return Option(
+        "-c",
+        "--constraint",
+        dest="constraints",
+        action="append",
+        default=[],
+        metavar="file",
+        help="Constrain versions using the given constraints file. "
+        "This option can be used multiple times.",
+    )
+
+
+def requirements() -> Option:
+    return Option(
+        "-r",
+        "--requirement",
+        dest="requirements",
+        action="append",
+        default=[],
+        metavar="file",
+        help="Install from the given requirements file. "
+        "This option can be used multiple times.",
+    )
+
+
+def editable() -> Option:
+    return Option(
+        "-e",
+        "--editable",
+        dest="editables",
+        action="append",
+        default=[],
+        metavar="path/url",
+        help=(
+            "Install a project in editable mode (i.e. setuptools "
+            '"develop mode") from a local project path or a VCS url.'
+        ),
+    )
+
+
+def _handle_src(option: Option, opt_str: str, value: str, parser: OptionParser) -> None:
+    value = os.path.abspath(value)
+    setattr(parser.values, option.dest, value)
+
+
+src: Callable[..., Option] = partial(
+    PipOption,
+    "--src",
+    "--source",
+    "--source-dir",
+    "--source-directory",
+    dest="src_dir",
+    type="path",
+    metavar="dir",
+    default=get_src_prefix(),
+    action="callback",
+    callback=_handle_src,
+    help="Directory to check out editable projects into. "
+    'The default in a virtualenv is "<venv path>/src". '
+    'The default for global installs is "<current dir>/src".',
+)
+
+
+def _get_format_control(values: Values, option: Option) -> Any:
+    """Get a format_control object."""
+    return getattr(values, option.dest)
+
+
+def _handle_no_binary(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value,
+        existing.no_binary,
+        existing.only_binary,
+    )
+
+
+def _handle_only_binary(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    existing = _get_format_control(parser.values, option)
+    FormatControl.handle_mutual_excludes(
+        value,
+        existing.only_binary,
+        existing.no_binary,
+    )
+
+
+def no_binary() -> Option:
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--no-binary",
+        dest="format_control",
+        action="callback",
+        callback=_handle_no_binary,
+        type="str",
+        default=format_control,
+        help="Do not use binary packages. Can be supplied multiple times, and "
+        'each time adds to the existing value. Accepts either ":all:" to '
+        'disable all binary packages, ":none:" to empty the set (notice '
+        "the colons), or one or more package names with commas between "
+        "them (no colons). Note that some packages are tricky to compile "
+        "and may fail to install when this option is used on them.",
+    )
+
+
+def only_binary() -> Option:
+    format_control = FormatControl(set(), set())
+    return Option(
+        "--only-binary",
+        dest="format_control",
+        action="callback",
+        callback=_handle_only_binary,
+        type="str",
+        default=format_control,
+        help="Do not use source packages. Can be supplied multiple times, and "
+        'each time adds to the existing value. Accepts either ":all:" to '
+        'disable all source packages, ":none:" to empty the set, or one '
+        "or more package names with commas between them. Packages "
+        "without binary distributions will fail to install when this "
+        "option is used on them.",
+    )
+
+
+platforms: Callable[..., Option] = partial(
+    Option,
+    "--platform",
+    dest="platforms",
+    metavar="platform",
+    action="append",
+    default=None,
+    help=(
+        "Only use wheels compatible with <platform>. Defaults to the "
+        "platform of the running system. Use this option multiple times to "
+        "specify multiple platforms supported by the target interpreter."
+    ),
+)
+
+
+# This was made a separate function for unit-testing purposes.
+def _convert_python_version(value: str) -> Tuple[Tuple[int, ...], Optional[str]]:
+    """
+    Convert a version string like "3", "37", or "3.7.3" into a tuple of ints.
+
+    :return: A 2-tuple (version_info, error_msg), where `error_msg` is
+        non-None if and only if there was a parsing error.
+    """
+    if not value:
+        # The empty string is the same as not providing a value.
+        return (None, None)
+
+    parts = value.split(".")
+    if len(parts) > 3:
+        return ((), "at most three version parts are allowed")
+
+    if len(parts) == 1:
+        # Then we are in the case of "3" or "37".
+        value = parts[0]
+        if len(value) > 1:
+            parts = [value[0], value[1:]]
+
+    try:
+        version_info = tuple(int(part) for part in parts)
+    except ValueError:
+        return ((), "each version part must be an integer")
+
+    return (version_info, None)
+
+
+def _handle_python_version(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    """
+    Handle a provided --python-version value.
+    """
+    version_info, error_msg = _convert_python_version(value)
+    if error_msg is not None:
+        msg = "invalid --python-version value: {!r}: {}".format(
+            value,
+            error_msg,
+        )
+        raise_option_error(parser, option=option, msg=msg)
+
+    parser.values.python_version = version_info
+
+
+python_version: Callable[..., Option] = partial(
+    Option,
+    "--python-version",
+    dest="python_version",
+    metavar="python_version",
+    action="callback",
+    callback=_handle_python_version,
+    type="str",
+    default=None,
+    help=dedent(
+        """\
+    The Python interpreter version to use for wheel and "Requires-Python"
+    compatibility checks. Defaults to a version derived from the running
+    interpreter. The version can be specified using up to three dot-separated
+    integers (e.g. "3" for 3.0.0, "3.7" for 3.7.0, or "3.7.3"). A major-minor
+    version can also be given as a string without dots (e.g. "37" for 3.7.0).
+    """
+    ),
+)
+
+
+implementation: Callable[..., Option] = partial(
+    Option,
+    "--implementation",
+    dest="implementation",
+    metavar="implementation",
+    default=None,
+    help=(
+        "Only use wheels compatible with Python "
+        "implementation <implementation>, e.g. 'pp', 'jy', 'cp', "
+        " or 'ip'. If not specified, then the current "
+        "interpreter implementation is used.  Use 'py' to force "
+        "implementation-agnostic wheels."
+    ),
+)
+
+
+abis: Callable[..., Option] = partial(
+    Option,
+    "--abi",
+    dest="abis",
+    metavar="abi",
+    action="append",
+    default=None,
+    help=(
+        "Only use wheels compatible with Python abi <abi>, e.g. 'pypy_41'. "
+        "If not specified, then the current interpreter abi tag is used. "
+        "Use this option multiple times to specify multiple abis supported "
+        "by the target interpreter. Generally you will need to specify "
+        "--implementation, --platform, and --python-version when using this "
+        "option."
+    ),
+)
+
+
+def add_target_python_options(cmd_opts: OptionGroup) -> None:
+    cmd_opts.add_option(platforms())
+    cmd_opts.add_option(python_version())
+    cmd_opts.add_option(implementation())
+    cmd_opts.add_option(abis())
+
+
+def make_target_python(options: Values) -> TargetPython:
+    target_python = TargetPython(
+        platforms=options.platforms,
+        py_version_info=options.python_version,
+        abis=options.abis,
+        implementation=options.implementation,
+    )
+
+    return target_python
+
+
+def prefer_binary() -> Option:
+    return Option(
+        "--prefer-binary",
+        dest="prefer_binary",
+        action="store_true",
+        default=False,
+        help="Prefer older binary packages over newer source packages.",
+    )
+
+
+cache_dir: Callable[..., Option] = partial(
+    PipOption,
+    "--cache-dir",
+    dest="cache_dir",
+    default=USER_CACHE_DIR,
+    metavar="dir",
+    type="path",
+    help="Store the cache data in <dir>.",
+)
+
+
+def _handle_no_cache_dir(
+    option: Option, opt: str, value: str, parser: OptionParser
+) -> None:
+    """
+    Process a value provided for the --no-cache-dir option.
+
+    This is an optparse.Option callback for the --no-cache-dir option.
+    """
+    # The value argument will be None if --no-cache-dir is passed via the
+    # command-line, since the option doesn't accept arguments.  However,
+    # the value can be non-None if the option is triggered e.g. by an
+    # environment variable, like PIP_NO_CACHE_DIR=true.
+    if value is not None:
+        # Then parse the string value to get argument error-checking.
+        try:
+            strtobool(value)
+        except ValueError as exc:
+            raise_option_error(parser, option=option, msg=str(exc))
+
+    # Originally, setting PIP_NO_CACHE_DIR to a value that strtobool()
+    # converted to 0 (like "false" or "no") caused cache_dir to be disabled
+    # rather than enabled (logic would say the latter).  Thus, we disable
+    # the cache directory not just on values that parse to True, but (for
+    # backwards compatibility reasons) also on values that parse to False.
+    # In other words, always set it to False if the option is provided in
+    # some (valid) form.
+    parser.values.cache_dir = False
+
+
+no_cache: Callable[..., Option] = partial(
+    Option,
+    "--no-cache-dir",
+    dest="cache_dir",
+    action="callback",
+    callback=_handle_no_cache_dir,
+    help="Disable the cache.",
+)
+
+no_deps: Callable[..., Option] = partial(
+    Option,
+    "--no-deps",
+    "--no-dependencies",
+    dest="ignore_dependencies",
+    action="store_true",
+    default=False,
+    help="Don't install package dependencies.",
+)
+
+ignore_requires_python: Callable[..., Option] = partial(
+    Option,
+    "--ignore-requires-python",
+    dest="ignore_requires_python",
+    action="store_true",
+    help="Ignore the Requires-Python information.",
+)
+
+no_build_isolation: Callable[..., Option] = partial(
+    Option,
+    "--no-build-isolation",
+    dest="build_isolation",
+    action="store_false",
+    default=True,
+    help="Disable isolation when building a modern source distribution. "
+    "Build dependencies specified by PEP 518 must be already installed "
+    "if this option is used.",
+)
+
+check_build_deps: Callable[..., Option] = partial(
+    Option,
+    "--check-build-dependencies",
+    dest="check_build_deps",
+    action="store_true",
+    default=False,
+    help="Check the build dependencies when PEP517 is used.",
+)
+
+
+def _handle_no_use_pep517(
+    option: Option, opt: str, value: str, parser: OptionParser
+) -> None:
+    """
+    Process a value provided for the --no-use-pep517 option.
+
+    This is an optparse.Option callback for the no_use_pep517 option.
+    """
+    # Since --no-use-pep517 doesn't accept arguments, the value argument
+    # will be None if --no-use-pep517 is passed via the command-line.
+    # However, the value can be non-None if the option is triggered e.g.
+    # by an environment variable, for example "PIP_NO_USE_PEP517=true".
+    if value is not None:
+        msg = """A value was passed for --no-use-pep517,
+        probably using either the PIP_NO_USE_PEP517 environment variable
+        or the "no-use-pep517" config file option. Use an appropriate value
+        of the PIP_USE_PEP517 environment variable or the "use-pep517"
+        config file option instead.
+        """
+        raise_option_error(parser, option=option, msg=msg)
+
+    # If user doesn't wish to use pep517, we check if setuptools is installed
+    # and raise error if it is not.
+    if not importlib.util.find_spec("setuptools"):
+        msg = "It is not possible to use --no-use-pep517 without setuptools installed."
+        raise_option_error(parser, option=option, msg=msg)
+
+    # Otherwise, --no-use-pep517 was passed via the command-line.
+    parser.values.use_pep517 = False
+
+
+use_pep517: Any = partial(
+    Option,
+    "--use-pep517",
+    dest="use_pep517",
+    action="store_true",
+    default=None,
+    help="Use PEP 517 for building source distributions "
+    "(use --no-use-pep517 to force legacy behaviour).",
+)
+
+no_use_pep517: Any = partial(
+    Option,
+    "--no-use-pep517",
+    dest="use_pep517",
+    action="callback",
+    callback=_handle_no_use_pep517,
+    default=None,
+    help=SUPPRESS_HELP,
+)
+
+
+def _handle_config_settings(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    key, sep, val = value.partition("=")
+    if sep != "=":
+        parser.error(f"Arguments to {opt_str} must be of the form KEY=VAL")  # noqa
+    dest = getattr(parser.values, option.dest)
+    if dest is None:
+        dest = {}
+        setattr(parser.values, option.dest, dest)
+    dest[key] = val
+
+
+config_settings: Callable[..., Option] = partial(
+    Option,
+    "--config-settings",
+    dest="config_settings",
+    type=str,
+    action="callback",
+    callback=_handle_config_settings,
+    metavar="settings",
+    help="Configuration settings to be passed to the PEP 517 build backend. "
+    "Settings take the form KEY=VALUE. Use multiple --config-settings options "
+    "to pass multiple keys to the backend.",
+)
+
+install_options: Callable[..., Option] = partial(
+    Option,
+    "--install-option",
+    dest="install_options",
+    action="append",
+    metavar="options",
+    help="Extra arguments to be supplied to the setup.py install "
+    'command (use like --install-option="--install-scripts=/usr/local/'
+    'bin"). Use multiple --install-option options to pass multiple '
+    "options to setup.py install. If you are using an option with a "
+    "directory path, be sure to use absolute path.",
+)
+
+build_options: Callable[..., Option] = partial(
+    Option,
+    "--build-option",
+    dest="build_options",
+    metavar="options",
+    action="append",
+    help="Extra arguments to be supplied to 'setup.py bdist_wheel'.",
+)
+
+global_options: Callable[..., Option] = partial(
+    Option,
+    "--global-option",
+    dest="global_options",
+    action="append",
+    metavar="options",
+    help="Extra global options to be supplied to the setup.py "
+    "call before the install or bdist_wheel command.",
+)
+
+no_clean: Callable[..., Option] = partial(
+    Option,
+    "--no-clean",
+    action="store_true",
+    default=False,
+    help="Don't clean up build directories.",
+)
+
+pre: Callable[..., Option] = partial(
+    Option,
+    "--pre",
+    action="store_true",
+    default=False,
+    help="Include pre-release and development versions. By default, "
+    "pip only finds stable versions.",
+)
+
+disable_pip_version_check: Callable[..., Option] = partial(
+    Option,
+    "--disable-pip-version-check",
+    dest="disable_pip_version_check",
+    action="store_true",
+    default=False,
+    help="Don't periodically check PyPI to determine whether a new version "
+    "of pip is available for download. Implied with --no-index.",
+)
+
+root_user_action: Callable[..., Option] = partial(
+    Option,
+    "--root-user-action",
+    dest="root_user_action",
+    default="warn",
+    choices=["warn", "ignore"],
+    help="Action if pip is run as a root user. By default, a warning message is shown.",
+)
+
+
+def _handle_merge_hash(
+    option: Option, opt_str: str, value: str, parser: OptionParser
+) -> None:
+    """Given a value spelled "algo:digest", append the digest to a list
+    pointed to in a dict by the algo name."""
+    if not parser.values.hashes:
+        parser.values.hashes = {}
+    try:
+        algo, digest = value.split(":", 1)
+    except ValueError:
+        parser.error(
+            "Arguments to {} must be a hash name "  # noqa
+            "followed by a value, like --hash=sha256:"
+            "abcde...".format(opt_str)
+        )
+    if algo not in STRONG_HASHES:
+        parser.error(
+            "Allowed hash algorithms for {} are {}.".format(  # noqa
+                opt_str, ", ".join(STRONG_HASHES)
+            )
+        )
+    parser.values.hashes.setdefault(algo, []).append(digest)
+
+
+hash: Callable[..., Option] = partial(
+    Option,
+    "--hash",
+    # Hash values eventually end up in InstallRequirement.hashes due to
+    # __dict__ copying in process_line().
+    dest="hashes",
+    action="callback",
+    callback=_handle_merge_hash,
+    type="string",
+    help="Verify that the package's archive matches this "
+    "hash before installing. Example: --hash=sha256:abcdef...",
+)
+
+
+require_hashes: Callable[..., Option] = partial(
+    Option,
+    "--require-hashes",
+    dest="require_hashes",
+    action="store_true",
+    default=False,
+    help="Require a hash to check each requirement against, for "
+    "repeatable installs. This option is implied when any package in a "
+    "requirements file has a --hash option.",
+)
+
+
+list_path: Callable[..., Option] = partial(
+    PipOption,
+    "--path",
+    dest="path",
+    type="path",
+    action="append",
+    help="Restrict to the specified installation path for listing "
+    "packages (can be used multiple times).",
+)
+
+
+def check_list_path_option(options: Values) -> None:
+    if options.path and (options.user or options.local):
+        raise CommandError("Cannot combine '--path' with '--user' or '--local'")
+
+
+list_exclude: Callable[..., Option] = partial(
+    PipOption,
+    "--exclude",
+    dest="excludes",
+    action="append",
+    metavar="package",
+    type="package_name",
+    help="Exclude specified package from the output",
+)
+
+
+no_python_version_warning: Callable[..., Option] = partial(
+    Option,
+    "--no-python-version-warning",
+    dest="no_python_version_warning",
+    action="store_true",
+    default=False,
+    help="Silence deprecation warnings for upcoming unsupported Pythons.",
+)
+
+
+use_new_feature: Callable[..., Option] = partial(
+    Option,
+    "--use-feature",
+    dest="features_enabled",
+    metavar="feature",
+    action="append",
+    default=[],
+    choices=[
+        "fast-deps",
+        "truststore",
+        "no-binary-enable-wheel-cache",
+    ],
+    help="Enable new functionality, that may be backward incompatible.",
+)
+
+use_deprecated_feature: Callable[..., Option] = partial(
+    Option,
+    "--use-deprecated",
+    dest="deprecated_features_enabled",
+    metavar="feature",
+    action="append",
+    default=[],
+    choices=[
+        "legacy-resolver",
+    ],
+    help=("Enable deprecated functionality, that will be removed in the future."),
+)
+
+
+##########
+# groups #
+##########
+
+general_group: Dict[str, Any] = {
+    "name": "General Options",
+    "options": [
+        help_,
+        debug_mode,
+        isolated_mode,
+        require_virtualenv,
+        python,
+        verbose,
+        version,
+        quiet,
+        log,
+        no_input,
+        proxy,
+        retries,
+        timeout,
+        exists_action,
+        trusted_host,
+        cert,
+        client_cert,
+        cache_dir,
+        no_cache,
+        disable_pip_version_check,
+        no_color,
+        no_python_version_warning,
+        use_new_feature,
+        use_deprecated_feature,
+    ],
+}
+
+index_group: Dict[str, Any] = {
+    "name": "Package Index Options",
+    "options": [
+        index_url,
+        extra_index_url,
+        no_index,
+        find_links,
+    ],
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/command_context.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/command_context.py
new file mode 100644
index 0000000..139995a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/command_context.py
@@ -0,0 +1,27 @@
+from contextlib import ExitStack, contextmanager
+from typing import ContextManager, Generator, TypeVar
+
+_T = TypeVar("_T", covariant=True)
+
+
+class CommandContextMixIn:
+    def __init__(self) -> None:
+        super().__init__()
+        self._in_main_context = False
+        self._main_context = ExitStack()
+
+    @contextmanager
+    def main_context(self) -> Generator[None, None, None]:
+        assert not self._in_main_context
+
+        self._in_main_context = True
+        try:
+            with self._main_context:
+                yield
+        finally:
+            self._in_main_context = False
+
+    def enter_context(self, context_provider: ContextManager[_T]) -> _T:
+        assert self._in_main_context
+
+        return self._main_context.enter_context(context_provider)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/main.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/main.py
new file mode 100644
index 0000000..0e31221
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/main.py
@@ -0,0 +1,70 @@
+"""Primary application entrypoint.
+"""
+import locale
+import logging
+import os
+import sys
+from typing import List, Optional
+
+from pip._internal.cli.autocompletion import autocomplete
+from pip._internal.cli.main_parser import parse_command
+from pip._internal.commands import create_command
+from pip._internal.exceptions import PipError
+from pip._internal.utils import deprecation
+
+logger = logging.getLogger(__name__)
+
+
+# Do not import and use main() directly! Using it directly is actively
+# discouraged by pip's maintainers. The name, location and behavior of
+# this function is subject to change, so calling it directly is not
+# portable across different pip versions.
+
+# In addition, running pip in-process is unsupported and unsafe. This is
+# elaborated in detail at
+# https://pip.pypa.io/en/stable/user_guide/#using-pip-from-your-program.
+# That document also provides suggestions that should work for nearly
+# all users that are considering importing and using main() directly.
+
+# However, we know that certain users will still want to invoke pip
+# in-process. If you understand and accept the implications of using pip
+# in an unsupported manner, the best approach is to use runpy to avoid
+# depending on the exact location of this entry point.
+
+# The following example shows how to use runpy to invoke pip in that
+# case:
+#
+#     sys.argv = ["pip", your, args, here]
+#     runpy.run_module("pip", run_name="__main__")
+#
+# Note that this will exit the process after running, unlike a direct
+# call to main. As it is not safe to do any processing after calling
+# main, this should not be an issue in practice.
+
+
+def main(args: Optional[List[str]] = None) -> int:
+    if args is None:
+        args = sys.argv[1:]
+
+    # Configure our deprecation warnings to be sent through loggers
+    deprecation.install_warning_logger()
+
+    autocomplete()
+
+    try:
+        cmd_name, cmd_args = parse_command(args)
+    except PipError as exc:
+        sys.stderr.write(f"ERROR: {exc}")
+        sys.stderr.write(os.linesep)
+        sys.exit(1)
+
+    # Needed for locale.getpreferredencoding(False) to work
+    # in pip._internal.utils.encoding.auto_decode
+    try:
+        locale.setlocale(locale.LC_ALL, "")
+    except locale.Error as e:
+        # setlocale can apparently crash if locale are uninitialized
+        logger.debug("Ignoring error %s when setting locale", e)
+    command = create_command(cmd_name, isolated=("--isolated" in cmd_args))
+
+    return command.main(cmd_args)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/main_parser.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/main_parser.py
new file mode 100644
index 0000000..5ade356
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/main_parser.py
@@ -0,0 +1,134 @@
+"""A single place for constructing and exposing the main parser
+"""
+
+import os
+import subprocess
+import sys
+from typing import List, Optional, Tuple
+
+from pip._internal.build_env import get_runnable_pip
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.parser import ConfigOptionParser, UpdatingDefaultsHelpFormatter
+from pip._internal.commands import commands_dict, get_similar_commands
+from pip._internal.exceptions import CommandError
+from pip._internal.utils.misc import get_pip_version, get_prog
+
+__all__ = ["create_main_parser", "parse_command"]
+
+
+def create_main_parser() -> ConfigOptionParser:
+    """Creates and returns the main parser for pip's CLI"""
+
+    parser = ConfigOptionParser(
+        usage="\n%prog <command> [options]",
+        add_help_option=False,
+        formatter=UpdatingDefaultsHelpFormatter(),
+        name="global",
+        prog=get_prog(),
+    )
+    parser.disable_interspersed_args()
+
+    parser.version = get_pip_version()
+
+    # add the general options
+    gen_opts = cmdoptions.make_option_group(cmdoptions.general_group, parser)
+    parser.add_option_group(gen_opts)
+
+    # so the help formatter knows
+    parser.main = True  # type: ignore
+
+    # create command listing for description
+    description = [""] + [
+        f"{name:27} {command_info.summary}"
+        for name, command_info in commands_dict.items()
+    ]
+    parser.description = "\n".join(description)
+
+    return parser
+
+
+def identify_python_interpreter(python: str) -> Optional[str]:
+    # If the named file exists, use it.
+    # If it's a directory, assume it's a virtual environment and
+    # look for the environment's Python executable.
+    if os.path.exists(python):
+        if os.path.isdir(python):
+            # bin/python for Unix, Scripts/python.exe for Windows
+            # Try both in case of odd cases like cygwin.
+            for exe in ("bin/python", "Scripts/python.exe"):
+                py = os.path.join(python, exe)
+                if os.path.exists(py):
+                    return py
+        else:
+            return python
+
+    # Could not find the interpreter specified
+    return None
+
+
+def parse_command(args: List[str]) -> Tuple[str, List[str]]:
+    parser = create_main_parser()
+
+    # Note: parser calls disable_interspersed_args(), so the result of this
+    # call is to split the initial args into the general options before the
+    # subcommand and everything else.
+    # For example:
+    #  args: ['--timeout=5', 'install', '--user', 'INITools']
+    #  general_options: ['--timeout==5']
+    #  args_else: ['install', '--user', 'INITools']
+    general_options, args_else = parser.parse_args(args)
+
+    # --python
+    if general_options.python and "_PIP_RUNNING_IN_SUBPROCESS" not in os.environ:
+        # Re-invoke pip using the specified Python interpreter
+        interpreter = identify_python_interpreter(general_options.python)
+        if interpreter is None:
+            raise CommandError(
+                f"Could not locate Python interpreter {general_options.python}"
+            )
+
+        pip_cmd = [
+            interpreter,
+            get_runnable_pip(),
+        ]
+        pip_cmd.extend(args)
+
+        # Set a flag so the child doesn't re-invoke itself, causing
+        # an infinite loop.
+        os.environ["_PIP_RUNNING_IN_SUBPROCESS"] = "1"
+        returncode = 0
+        try:
+            proc = subprocess.run(pip_cmd)
+            returncode = proc.returncode
+        except (subprocess.SubprocessError, OSError) as exc:
+            raise CommandError(f"Failed to run pip under {interpreter}: {exc}")
+        sys.exit(returncode)
+
+    # --version
+    if general_options.version:
+        sys.stdout.write(parser.version)
+        sys.stdout.write(os.linesep)
+        sys.exit()
+
+    # pip || pip help -> print_help()
+    if not args_else or (args_else[0] == "help" and len(args_else) == 1):
+        parser.print_help()
+        sys.exit()
+
+    # the subcommand name
+    cmd_name = args_else[0]
+
+    if cmd_name not in commands_dict:
+        guess = get_similar_commands(cmd_name)
+
+        msg = [f'unknown command "{cmd_name}"']
+        if guess:
+            msg.append(f'maybe you meant "{guess}"')
+
+        raise CommandError(" - ".join(msg))
+
+    # all the args without the subcommand
+    cmd_args = args[:]
+    cmd_args.remove(cmd_name)
+
+    return cmd_name, cmd_args
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/parser.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/parser.py
new file mode 100644
index 0000000..c762cf2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/parser.py
@@ -0,0 +1,294 @@
+"""Base option parser setup"""
+
+import logging
+import optparse
+import shutil
+import sys
+import textwrap
+from contextlib import suppress
+from typing import Any, Dict, Generator, List, Tuple
+
+from pip._internal.cli.status_codes import UNKNOWN_ERROR
+from pip._internal.configuration import Configuration, ConfigurationError
+from pip._internal.utils.misc import redact_auth_from_url, strtobool
+
+logger = logging.getLogger(__name__)
+
+
+class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
+    """A prettier/less verbose help formatter for optparse."""
+
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
+        # help position must be aligned with __init__.parseopts.description
+        kwargs["max_help_position"] = 30
+        kwargs["indent_increment"] = 1
+        kwargs["width"] = shutil.get_terminal_size()[0] - 2
+        super().__init__(*args, **kwargs)
+
+    def format_option_strings(self, option: optparse.Option) -> str:
+        return self._format_option_strings(option)
+
+    def _format_option_strings(
+        self, option: optparse.Option, mvarfmt: str = " <{}>", optsep: str = ", "
+    ) -> str:
+        """
+        Return a comma-separated list of option strings and metavars.
+
+        :param option:  tuple of (short opt, long opt), e.g: ('-f', '--format')
+        :param mvarfmt: metavar format string
+        :param optsep:  separator
+        """
+        opts = []
+
+        if option._short_opts:
+            opts.append(option._short_opts[0])
+        if option._long_opts:
+            opts.append(option._long_opts[0])
+        if len(opts) > 1:
+            opts.insert(1, optsep)
+
+        if option.takes_value():
+            assert option.dest is not None
+            metavar = option.metavar or option.dest.lower()
+            opts.append(mvarfmt.format(metavar.lower()))
+
+        return "".join(opts)
+
+    def format_heading(self, heading: str) -> str:
+        if heading == "Options":
+            return ""
+        return heading + ":\n"
+
+    def format_usage(self, usage: str) -> str:
+        """
+        Ensure there is only one newline between usage and the first heading
+        if there is no description.
+        """
+        msg = "\nUsage: {}\n".format(self.indent_lines(textwrap.dedent(usage), "  "))
+        return msg
+
+    def format_description(self, description: str) -> str:
+        # leave full control over description to us
+        if description:
+            if hasattr(self.parser, "main"):
+                label = "Commands"
+            else:
+                label = "Description"
+            # some doc strings have initial newlines, some don't
+            description = description.lstrip("\n")
+            # some doc strings have final newlines and spaces, some don't
+            description = description.rstrip()
+            # dedent, then reindent
+            description = self.indent_lines(textwrap.dedent(description), "  ")
+            description = f"{label}:\n{description}\n"
+            return description
+        else:
+            return ""
+
+    def format_epilog(self, epilog: str) -> str:
+        # leave full control over epilog to us
+        if epilog:
+            return epilog
+        else:
+            return ""
+
+    def indent_lines(self, text: str, indent: str) -> str:
+        new_lines = [indent + line for line in text.split("\n")]
+        return "\n".join(new_lines)
+
+
+class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
+    """Custom help formatter for use in ConfigOptionParser.
+
+    This is updates the defaults before expanding them, allowing
+    them to show up correctly in the help listing.
+
+    Also redact auth from url type options
+    """
+
+    def expand_default(self, option: optparse.Option) -> str:
+        default_values = None
+        if self.parser is not None:
+            assert isinstance(self.parser, ConfigOptionParser)
+            self.parser._update_defaults(self.parser.defaults)
+            assert option.dest is not None
+            default_values = self.parser.defaults.get(option.dest)
+        help_text = super().expand_default(option)
+
+        if default_values and option.metavar == "URL":
+            if isinstance(default_values, str):
+                default_values = [default_values]
+
+            # If its not a list, we should abort and just return the help text
+            if not isinstance(default_values, list):
+                default_values = []
+
+            for val in default_values:
+                help_text = help_text.replace(val, redact_auth_from_url(val))
+
+        return help_text
+
+
+class CustomOptionParser(optparse.OptionParser):
+    def insert_option_group(
+        self, idx: int, *args: Any, **kwargs: Any
+    ) -> optparse.OptionGroup:
+        """Insert an OptionGroup at a given position."""
+        group = self.add_option_group(*args, **kwargs)
+
+        self.option_groups.pop()
+        self.option_groups.insert(idx, group)
+
+        return group
+
+    @property
+    def option_list_all(self) -> List[optparse.Option]:
+        """Get a list of all options, including those in option groups."""
+        res = self.option_list[:]
+        for i in self.option_groups:
+            res.extend(i.option_list)
+
+        return res
+
+
+class ConfigOptionParser(CustomOptionParser):
+    """Custom option parser which updates its defaults by checking the
+    configuration files and environmental variables"""
+
+    def __init__(
+        self,
+        *args: Any,
+        name: str,
+        isolated: bool = False,
+        **kwargs: Any,
+    ) -> None:
+        self.name = name
+        self.config = Configuration(isolated)
+
+        assert self.name
+        super().__init__(*args, **kwargs)
+
+    def check_default(self, option: optparse.Option, key: str, val: Any) -> Any:
+        try:
+            return option.check_value(key, val)
+        except optparse.OptionValueError as exc:
+            print(f"An error occurred during configuration: {exc}")
+            sys.exit(3)
+
+    def _get_ordered_configuration_items(
+        self,
+    ) -> Generator[Tuple[str, Any], None, None]:
+        # Configuration gives keys in an unordered manner. Order them.
+        override_order = ["global", self.name, ":env:"]
+
+        # Pool the options into different groups
+        section_items: Dict[str, List[Tuple[str, Any]]] = {
+            name: [] for name in override_order
+        }
+        for section_key, val in self.config.items():
+            # ignore empty values
+            if not val:
+                logger.debug(
+                    "Ignoring configuration key '%s' as it's value is empty.",
+                    section_key,
+                )
+                continue
+
+            section, key = section_key.split(".", 1)
+            if section in override_order:
+                section_items[section].append((key, val))
+
+        # Yield each group in their override order
+        for section in override_order:
+            for key, val in section_items[section]:
+                yield key, val
+
+    def _update_defaults(self, defaults: Dict[str, Any]) -> Dict[str, Any]:
+        """Updates the given defaults with values from the config files and
+        the environ. Does a little special handling for certain types of
+        options (lists)."""
+
+        # Accumulate complex default state.
+        self.values = optparse.Values(self.defaults)
+        late_eval = set()
+        # Then set the options with those values
+        for key, val in self._get_ordered_configuration_items():
+            # '--' because configuration supports only long names
+            option = self.get_option("--" + key)
+
+            # Ignore options not present in this parser. E.g. non-globals put
+            # in [global] by users that want them to apply to all applicable
+            # commands.
+            if option is None:
+                continue
+
+            assert option.dest is not None
+
+            if option.action in ("store_true", "store_false"):
+                try:
+                    val = strtobool(val)
+                except ValueError:
+                    self.error(
+                        "{} is not a valid value for {} option, "  # noqa
+                        "please specify a boolean value like yes/no, "
+                        "true/false or 1/0 instead.".format(val, key)
+                    )
+            elif option.action == "count":
+                with suppress(ValueError):
+                    val = strtobool(val)
+                with suppress(ValueError):
+                    val = int(val)
+                if not isinstance(val, int) or val < 0:
+                    self.error(
+                        "{} is not a valid value for {} option, "  # noqa
+                        "please instead specify either a non-negative integer "
+                        "or a boolean value like yes/no or false/true "
+                        "which is equivalent to 1/0.".format(val, key)
+                    )
+            elif option.action == "append":
+                val = val.split()
+                val = [self.check_default(option, key, v) for v in val]
+            elif option.action == "callback":
+                assert option.callback is not None
+                late_eval.add(option.dest)
+                opt_str = option.get_opt_string()
+                val = option.convert_value(opt_str, val)
+                # From take_action
+                args = option.callback_args or ()
+                kwargs = option.callback_kwargs or {}
+                option.callback(option, opt_str, val, self, *args, **kwargs)
+            else:
+                val = self.check_default(option, key, val)
+
+            defaults[option.dest] = val
+
+        for key in late_eval:
+            defaults[key] = getattr(self.values, key)
+        self.values = None
+        return defaults
+
+    def get_default_values(self) -> optparse.Values:
+        """Overriding to make updating the defaults after instantiation of
+        the option parser possible, _update_defaults() does the dirty work."""
+        if not self.process_default_values:
+            # Old, pre-Optik 1.5 behaviour.
+            return optparse.Values(self.defaults)
+
+        # Load the configuration, or error out in case of an error
+        try:
+            self.config.load()
+        except ConfigurationError as err:
+            self.exit(UNKNOWN_ERROR, str(err))
+
+        defaults = self._update_defaults(self.defaults.copy())  # ours
+        for option in self._get_all_options():
+            assert option.dest is not None
+            default = defaults.get(option.dest)
+            if isinstance(default, str):
+                opt_str = option.get_opt_string()
+                defaults[option.dest] = option.check_value(opt_str, default)
+        return optparse.Values(defaults)
+
+    def error(self, msg: str) -> None:
+        self.print_usage(sys.stderr)
+        self.exit(UNKNOWN_ERROR, f"{msg}\n")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/progress_bars.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/progress_bars.py
new file mode 100644
index 0000000..0ad1403
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/progress_bars.py
@@ -0,0 +1,68 @@
+import functools
+from typing import Callable, Generator, Iterable, Iterator, Optional, Tuple
+
+from pip._vendor.rich.progress import (
+    BarColumn,
+    DownloadColumn,
+    FileSizeColumn,
+    Progress,
+    ProgressColumn,
+    SpinnerColumn,
+    TextColumn,
+    TimeElapsedColumn,
+    TimeRemainingColumn,
+    TransferSpeedColumn,
+)
+
+from pip._internal.utils.logging import get_indentation
+
+DownloadProgressRenderer = Callable[[Iterable[bytes]], Iterator[bytes]]
+
+
+def _rich_progress_bar(
+    iterable: Iterable[bytes],
+    *,
+    bar_type: str,
+    size: int,
+) -> Generator[bytes, None, None]:
+    assert bar_type == "on", "This should only be used in the default mode."
+
+    if not size:
+        total = float("inf")
+        columns: Tuple[ProgressColumn, ...] = (
+            TextColumn("[progress.description]{task.description}"),
+            SpinnerColumn("line", speed=1.5),
+            FileSizeColumn(),
+            TransferSpeedColumn(),
+            TimeElapsedColumn(),
+        )
+    else:
+        total = size
+        columns = (
+            TextColumn("[progress.description]{task.description}"),
+            BarColumn(),
+            DownloadColumn(),
+            TransferSpeedColumn(),
+            TextColumn("eta"),
+            TimeRemainingColumn(),
+        )
+
+    progress = Progress(*columns, refresh_per_second=30)
+    task_id = progress.add_task(" " * (get_indentation() + 2), total=total)
+    with progress:
+        for chunk in iterable:
+            yield chunk
+            progress.update(task_id, advance=len(chunk))
+
+
+def get_download_progress_renderer(
+    *, bar_type: str, size: Optional[int] = None
+) -> DownloadProgressRenderer:
+    """Get an object that can be used to render the download progress.
+
+    Returns a callable, that takes an iterable to "wrap".
+    """
+    if bar_type == "on":
+        return functools.partial(_rich_progress_bar, bar_type=bar_type, size=size)
+    else:
+        return iter  # no-op, when passed an iterator
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/req_command.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/req_command.py
new file mode 100644
index 0000000..1044809
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/req_command.py
@@ -0,0 +1,502 @@
+"""Contains the Command base classes that depend on PipSession.
+
+The classes in this module are in a separate module so the commands not
+needing download / PackageFinder capability don't unnecessarily import the
+PackageFinder machinery and all its vendored dependencies, etc.
+"""
+
+import logging
+import os
+import sys
+from functools import partial
+from optparse import Values
+from typing import TYPE_CHECKING, Any, List, Optional, Tuple
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.command_context import CommandContextMixIn
+from pip._internal.exceptions import CommandError, PreviousBuildDirError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.network.session import PipSession
+from pip._internal.operations.build.build_tracker import BuildTracker
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+    install_req_from_parsed_requirement,
+    install_req_from_req_string,
+)
+from pip._internal.req.req_file import parse_requirements
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.resolution.base import BaseResolver
+from pip._internal.self_outdated_check import pip_self_version_check
+from pip._internal.utils.temp_dir import (
+    TempDirectory,
+    TempDirectoryTypeRegistry,
+    tempdir_kinds,
+)
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+if TYPE_CHECKING:
+    from ssl import SSLContext
+
+logger = logging.getLogger(__name__)
+
+
+def _create_truststore_ssl_context() -> Optional["SSLContext"]:
+    if sys.version_info < (3, 10):
+        raise CommandError("The truststore feature is only available for Python 3.10+")
+
+    try:
+        import ssl
+    except ImportError:
+        logger.warning("Disabling truststore since ssl support is missing")
+        return None
+
+    try:
+        import truststore
+    except ImportError:
+        raise CommandError(
+            "To use the truststore feature, 'truststore' must be installed into "
+            "pip's current environment."
+        )
+
+    return truststore.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
+
+
+class SessionCommandMixin(CommandContextMixIn):
+
+    """
+    A class mixin for command classes needing _build_session().
+    """
+
+    def __init__(self) -> None:
+        super().__init__()
+        self._session: Optional[PipSession] = None
+
+    @classmethod
+    def _get_index_urls(cls, options: Values) -> Optional[List[str]]:
+        """Return a list of index urls from user-provided options."""
+        index_urls = []
+        if not getattr(options, "no_index", False):
+            url = getattr(options, "index_url", None)
+            if url:
+                index_urls.append(url)
+        urls = getattr(options, "extra_index_urls", None)
+        if urls:
+            index_urls.extend(urls)
+        # Return None rather than an empty list
+        return index_urls or None
+
+    def get_default_session(self, options: Values) -> PipSession:
+        """Get a default-managed session."""
+        if self._session is None:
+            self._session = self.enter_context(self._build_session(options))
+            # there's no type annotation on requests.Session, so it's
+            # automatically ContextManager[Any] and self._session becomes Any,
+            # then https://github.com/python/mypy/issues/7696 kicks in
+            assert self._session is not None
+        return self._session
+
+    def _build_session(
+        self,
+        options: Values,
+        retries: Optional[int] = None,
+        timeout: Optional[int] = None,
+        fallback_to_certifi: bool = False,
+    ) -> PipSession:
+        cache_dir = options.cache_dir
+        assert not cache_dir or os.path.isabs(cache_dir)
+
+        if "truststore" in options.features_enabled:
+            try:
+                ssl_context = _create_truststore_ssl_context()
+            except Exception:
+                if not fallback_to_certifi:
+                    raise
+                ssl_context = None
+        else:
+            ssl_context = None
+
+        session = PipSession(
+            cache=os.path.join(cache_dir, "http") if cache_dir else None,
+            retries=retries if retries is not None else options.retries,
+            trusted_hosts=options.trusted_hosts,
+            index_urls=self._get_index_urls(options),
+            ssl_context=ssl_context,
+        )
+
+        # Handle custom ca-bundles from the user
+        if options.cert:
+            session.verify = options.cert
+
+        # Handle SSL client certificate
+        if options.client_cert:
+            session.cert = options.client_cert
+
+        # Handle timeouts
+        if options.timeout or timeout:
+            session.timeout = timeout if timeout is not None else options.timeout
+
+        # Handle configured proxies
+        if options.proxy:
+            session.proxies = {
+                "http": options.proxy,
+                "https": options.proxy,
+            }
+
+        # Determine if we can prompt the user for authentication or not
+        session.auth.prompting = not options.no_input
+
+        return session
+
+
+class IndexGroupCommand(Command, SessionCommandMixin):
+
+    """
+    Abstract base class for commands with the index_group options.
+
+    This also corresponds to the commands that permit the pip version check.
+    """
+
+    def handle_pip_version_check(self, options: Values) -> None:
+        """
+        Do the pip version check if not disabled.
+
+        This overrides the default behavior of not doing the check.
+        """
+        # Make sure the index_group options are present.
+        assert hasattr(options, "no_index")
+
+        if options.disable_pip_version_check or options.no_index:
+            return
+
+        # Otherwise, check if we're using the latest version of pip available.
+        session = self._build_session(
+            options,
+            retries=0,
+            timeout=min(5, options.timeout),
+            # This is set to ensure the function does not fail when truststore is
+            # specified in use-feature but cannot be loaded. This usually raises a
+            # CommandError and shows a nice user-facing error, but this function is not
+            # called in that try-except block.
+            fallback_to_certifi=True,
+        )
+        with session:
+            pip_self_version_check(session, options)
+
+
+KEEPABLE_TEMPDIR_TYPES = [
+    tempdir_kinds.BUILD_ENV,
+    tempdir_kinds.EPHEM_WHEEL_CACHE,
+    tempdir_kinds.REQ_BUILD,
+]
+
+
+def warn_if_run_as_root() -> None:
+    """Output a warning for sudo users on Unix.
+
+    In a virtual environment, sudo pip still writes to virtualenv.
+    On Windows, users may run pip as Administrator without issues.
+    This warning only applies to Unix root users outside of virtualenv.
+    """
+    if running_under_virtualenv():
+        return
+    if not hasattr(os, "getuid"):
+        return
+    # On Windows, there are no "system managed" Python packages. Installing as
+    # Administrator via pip is the correct way of updating system environments.
+    #
+    # We choose sys.platform over utils.compat.WINDOWS here to enable Mypy platform
+    # checks: https://mypy.readthedocs.io/en/stable/common_issues.html
+    if sys.platform == "win32" or sys.platform == "cygwin":
+        return
+
+    if os.getuid() != 0:
+        return
+
+    logger.warning(
+        "Running pip as the 'root' user can result in broken permissions and "
+        "conflicting behaviour with the system package manager. "
+        "It is recommended to use a virtual environment instead: "
+        "https://pip.pypa.io/warnings/venv"
+    )
+
+
+def with_cleanup(func: Any) -> Any:
+    """Decorator for common logic related to managing temporary
+    directories.
+    """
+
+    def configure_tempdir_registry(registry: TempDirectoryTypeRegistry) -> None:
+        for t in KEEPABLE_TEMPDIR_TYPES:
+            registry.set_delete(t, False)
+
+    def wrapper(
+        self: RequirementCommand, options: Values, args: List[Any]
+    ) -> Optional[int]:
+        assert self.tempdir_registry is not None
+        if options.no_clean:
+            configure_tempdir_registry(self.tempdir_registry)
+
+        try:
+            return func(self, options, args)
+        except PreviousBuildDirError:
+            # This kind of conflict can occur when the user passes an explicit
+            # build directory with a pre-existing folder. In that case we do
+            # not want to accidentally remove it.
+            configure_tempdir_registry(self.tempdir_registry)
+            raise
+
+    return wrapper
+
+
+class RequirementCommand(IndexGroupCommand):
+    def __init__(self, *args: Any, **kw: Any) -> None:
+        super().__init__(*args, **kw)
+
+        self.cmd_opts.add_option(cmdoptions.no_clean())
+
+    @staticmethod
+    def determine_resolver_variant(options: Values) -> str:
+        """Determines which resolver should be used, based on the given options."""
+        if "legacy-resolver" in options.deprecated_features_enabled:
+            return "legacy"
+
+        return "2020-resolver"
+
+    @classmethod
+    def make_requirement_preparer(
+        cls,
+        temp_build_dir: TempDirectory,
+        options: Values,
+        build_tracker: BuildTracker,
+        session: PipSession,
+        finder: PackageFinder,
+        use_user_site: bool,
+        download_dir: Optional[str] = None,
+        verbosity: int = 0,
+    ) -> RequirementPreparer:
+        """
+        Create a RequirementPreparer instance for the given parameters.
+        """
+        temp_build_dir_path = temp_build_dir.path
+        assert temp_build_dir_path is not None
+
+        resolver_variant = cls.determine_resolver_variant(options)
+        if resolver_variant == "2020-resolver":
+            lazy_wheel = "fast-deps" in options.features_enabled
+            if lazy_wheel:
+                logger.warning(
+                    "pip is using lazily downloaded wheels using HTTP "
+                    "range requests to obtain dependency information. "
+                    "This experimental feature is enabled through "
+                    "--use-feature=fast-deps and it is not ready for "
+                    "production."
+                )
+        else:
+            lazy_wheel = False
+            if "fast-deps" in options.features_enabled:
+                logger.warning(
+                    "fast-deps has no effect when used with the legacy resolver."
+                )
+
+        return RequirementPreparer(
+            build_dir=temp_build_dir_path,
+            src_dir=options.src_dir,
+            download_dir=download_dir,
+            build_isolation=options.build_isolation,
+            check_build_deps=options.check_build_deps,
+            build_tracker=build_tracker,
+            session=session,
+            progress_bar=options.progress_bar,
+            finder=finder,
+            require_hashes=options.require_hashes,
+            use_user_site=use_user_site,
+            lazy_wheel=lazy_wheel,
+            verbosity=verbosity,
+        )
+
+    @classmethod
+    def make_resolver(
+        cls,
+        preparer: RequirementPreparer,
+        finder: PackageFinder,
+        options: Values,
+        wheel_cache: Optional[WheelCache] = None,
+        use_user_site: bool = False,
+        ignore_installed: bool = True,
+        ignore_requires_python: bool = False,
+        force_reinstall: bool = False,
+        upgrade_strategy: str = "to-satisfy-only",
+        use_pep517: Optional[bool] = None,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+    ) -> BaseResolver:
+        """
+        Create a Resolver instance for the given parameters.
+        """
+        make_install_req = partial(
+            install_req_from_req_string,
+            isolated=options.isolated_mode,
+            use_pep517=use_pep517,
+            config_settings=getattr(options, "config_settings", None),
+        )
+        resolver_variant = cls.determine_resolver_variant(options)
+        # The long import name and duplicated invocation is needed to convince
+        # Mypy into correctly typechecking. Otherwise it would complain the
+        # "Resolver" class being redefined.
+        if resolver_variant == "2020-resolver":
+            import pip._internal.resolution.resolvelib.resolver
+
+            return pip._internal.resolution.resolvelib.resolver.Resolver(
+                preparer=preparer,
+                finder=finder,
+                wheel_cache=wheel_cache,
+                make_install_req=make_install_req,
+                use_user_site=use_user_site,
+                ignore_dependencies=options.ignore_dependencies,
+                ignore_installed=ignore_installed,
+                ignore_requires_python=ignore_requires_python,
+                force_reinstall=force_reinstall,
+                upgrade_strategy=upgrade_strategy,
+                py_version_info=py_version_info,
+            )
+        import pip._internal.resolution.legacy.resolver
+
+        return pip._internal.resolution.legacy.resolver.Resolver(
+            preparer=preparer,
+            finder=finder,
+            wheel_cache=wheel_cache,
+            make_install_req=make_install_req,
+            use_user_site=use_user_site,
+            ignore_dependencies=options.ignore_dependencies,
+            ignore_installed=ignore_installed,
+            ignore_requires_python=ignore_requires_python,
+            force_reinstall=force_reinstall,
+            upgrade_strategy=upgrade_strategy,
+            py_version_info=py_version_info,
+        )
+
+    def get_requirements(
+        self,
+        args: List[str],
+        options: Values,
+        finder: PackageFinder,
+        session: PipSession,
+    ) -> List[InstallRequirement]:
+        """
+        Parse command-line arguments into the corresponding requirements.
+        """
+        requirements: List[InstallRequirement] = []
+        for filename in options.constraints:
+            for parsed_req in parse_requirements(
+                filename,
+                constraint=True,
+                finder=finder,
+                options=options,
+                session=session,
+            ):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    user_supplied=False,
+                )
+                requirements.append(req_to_add)
+
+        for req in args:
+            req_to_add = install_req_from_line(
+                req,
+                None,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                user_supplied=True,
+                config_settings=getattr(options, "config_settings", None),
+            )
+            requirements.append(req_to_add)
+
+        for req in options.editables:
+            req_to_add = install_req_from_editable(
+                req,
+                user_supplied=True,
+                isolated=options.isolated_mode,
+                use_pep517=options.use_pep517,
+                config_settings=getattr(options, "config_settings", None),
+            )
+            requirements.append(req_to_add)
+
+        # NOTE: options.require_hashes may be set if --require-hashes is True
+        for filename in options.requirements:
+            for parsed_req in parse_requirements(
+                filename, finder=finder, options=options, session=session
+            ):
+                req_to_add = install_req_from_parsed_requirement(
+                    parsed_req,
+                    isolated=options.isolated_mode,
+                    use_pep517=options.use_pep517,
+                    user_supplied=True,
+                )
+                requirements.append(req_to_add)
+
+        # If any requirement has hash options, enable hash checking.
+        if any(req.has_hash_options for req in requirements):
+            options.require_hashes = True
+
+        if not (args or options.editables or options.requirements):
+            opts = {"name": self.name}
+            if options.find_links:
+                raise CommandError(
+                    "You must give at least one requirement to {name} "
+                    '(maybe you meant "pip {name} {links}"?)'.format(
+                        **dict(opts, links=" ".join(options.find_links))
+                    )
+                )
+            else:
+                raise CommandError(
+                    "You must give at least one requirement to {name} "
+                    '(see "pip help {name}")'.format(**opts)
+                )
+
+        return requirements
+
+    @staticmethod
+    def trace_basic_info(finder: PackageFinder) -> None:
+        """
+        Trace basic information about the provided objects.
+        """
+        # Display where finder is looking for packages
+        search_scope = finder.search_scope
+        locations = search_scope.get_formatted_locations()
+        if locations:
+            logger.info(locations)
+
+    def _build_package_finder(
+        self,
+        options: Values,
+        session: PipSession,
+        target_python: Optional[TargetPython] = None,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> PackageFinder:
+        """
+        Create a package finder appropriate to this requirement command.
+
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+        selection_prefs = SelectionPreferences(
+            allow_yanked=True,
+            format_control=options.format_control,
+            allow_all_prereleases=options.pre,
+            prefer_binary=options.prefer_binary,
+            ignore_requires_python=ignore_requires_python,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+            target_python=target_python,
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/spinners.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/spinners.py
new file mode 100644
index 0000000..cf2b976
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/spinners.py
@@ -0,0 +1,159 @@
+import contextlib
+import itertools
+import logging
+import sys
+import time
+from typing import IO, Generator, Optional
+
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import get_indentation
+
+logger = logging.getLogger(__name__)
+
+
+class SpinnerInterface:
+    def spin(self) -> None:
+        raise NotImplementedError()
+
+    def finish(self, final_status: str) -> None:
+        raise NotImplementedError()
+
+
+class InteractiveSpinner(SpinnerInterface):
+    def __init__(
+        self,
+        message: str,
+        file: Optional[IO[str]] = None,
+        spin_chars: str = "-\\|/",
+        # Empirically, 8 updates/second looks nice
+        min_update_interval_seconds: float = 0.125,
+    ):
+        self._message = message
+        if file is None:
+            file = sys.stdout
+        self._file = file
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._finished = False
+
+        self._spin_cycle = itertools.cycle(spin_chars)
+
+        self._file.write(" " * get_indentation() + self._message + " ... ")
+        self._width = 0
+
+    def _write(self, status: str) -> None:
+        assert not self._finished
+        # Erase what we wrote before by backspacing to the beginning, writing
+        # spaces to overwrite the old text, and then backspacing again
+        backup = "\b" * self._width
+        self._file.write(backup + " " * self._width + backup)
+        # Now we have a blank slate to add our status
+        self._file.write(status)
+        self._width = len(status)
+        self._file.flush()
+        self._rate_limiter.reset()
+
+    def spin(self) -> None:
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._write(next(self._spin_cycle))
+
+    def finish(self, final_status: str) -> None:
+        if self._finished:
+            return
+        self._write(final_status)
+        self._file.write("\n")
+        self._file.flush()
+        self._finished = True
+
+
+# Used for dumb terminals, non-interactive installs (no tty), etc.
+# We still print updates occasionally (once every 60 seconds by default) to
+# act as a keep-alive for systems like Travis-CI that take lack-of-output as
+# an indication that a task has frozen.
+class NonInteractiveSpinner(SpinnerInterface):
+    def __init__(self, message: str, min_update_interval_seconds: float = 60.0) -> None:
+        self._message = message
+        self._finished = False
+        self._rate_limiter = RateLimiter(min_update_interval_seconds)
+        self._update("started")
+
+    def _update(self, status: str) -> None:
+        assert not self._finished
+        self._rate_limiter.reset()
+        logger.info("%s: %s", self._message, status)
+
+    def spin(self) -> None:
+        if self._finished:
+            return
+        if not self._rate_limiter.ready():
+            return
+        self._update("still running...")
+
+    def finish(self, final_status: str) -> None:
+        if self._finished:
+            return
+        self._update(f"finished with status '{final_status}'")
+        self._finished = True
+
+
+class RateLimiter:
+    def __init__(self, min_update_interval_seconds: float) -> None:
+        self._min_update_interval_seconds = min_update_interval_seconds
+        self._last_update: float = 0
+
+    def ready(self) -> bool:
+        now = time.time()
+        delta = now - self._last_update
+        return delta >= self._min_update_interval_seconds
+
+    def reset(self) -> None:
+        self._last_update = time.time()
+
+
+@contextlib.contextmanager
+def open_spinner(message: str) -> Generator[SpinnerInterface, None, None]:
+    # Interactive spinner goes directly to sys.stdout rather than being routed
+    # through the logging system, but it acts like it has level INFO,
+    # i.e. it's only displayed if we're at level INFO or better.
+    # Non-interactive spinner goes through the logging system, so it is always
+    # in sync with logging configuration.
+    if sys.stdout.isatty() and logger.getEffectiveLevel() <= logging.INFO:
+        spinner: SpinnerInterface = InteractiveSpinner(message)
+    else:
+        spinner = NonInteractiveSpinner(message)
+    try:
+        with hidden_cursor(sys.stdout):
+            yield spinner
+    except KeyboardInterrupt:
+        spinner.finish("canceled")
+        raise
+    except Exception:
+        spinner.finish("error")
+        raise
+    else:
+        spinner.finish("done")
+
+
+HIDE_CURSOR = "\x1b[?25l"
+SHOW_CURSOR = "\x1b[?25h"
+
+
+@contextlib.contextmanager
+def hidden_cursor(file: IO[str]) -> Generator[None, None, None]:
+    # The Windows terminal does not support the hide/show cursor ANSI codes,
+    # even via colorama. So don't even try.
+    if WINDOWS:
+        yield
+    # We don't want to clutter the output with control characters if we're
+    # writing to a file, or if the user is running with --quiet.
+    # See https://github.com/pypa/pip/issues/3418
+    elif not file.isatty() or logger.getEffectiveLevel() > logging.INFO:
+        yield
+    else:
+        file.write(HIDE_CURSOR)
+        try:
+            yield
+        finally:
+            file.write(SHOW_CURSOR)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/cli/status_codes.py b/venv/lib/python3.9/site-packages/pip/_internal/cli/status_codes.py
new file mode 100644
index 0000000..5e29502
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/cli/status_codes.py
@@ -0,0 +1,6 @@
+SUCCESS = 0
+ERROR = 1
+UNKNOWN_ERROR = 2
+VIRTUALENV_NOT_FOUND = 3
+PREVIOUS_BUILD_DIR_ERROR = 4
+NO_MATCHES_FOUND = 23
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/__init__.py
new file mode 100644
index 0000000..858a410
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/__init__.py
@@ -0,0 +1,132 @@
+"""
+Package containing all pip commands
+"""
+
+import importlib
+from collections import namedtuple
+from typing import Any, Dict, Optional
+
+from pip._internal.cli.base_command import Command
+
+CommandInfo = namedtuple("CommandInfo", "module_path, class_name, summary")
+
+# This dictionary does a bunch of heavy lifting for help output:
+# - Enables avoiding additional (costly) imports for presenting `--help`.
+# - The ordering matters for help display.
+#
+# Even though the module path starts with the same "pip._internal.commands"
+# prefix, the full path makes testing easier (specifically when modifying
+# `commands_dict` in test setup / teardown).
+commands_dict: Dict[str, CommandInfo] = {
+    "install": CommandInfo(
+        "pip._internal.commands.install",
+        "InstallCommand",
+        "Install packages.",
+    ),
+    "download": CommandInfo(
+        "pip._internal.commands.download",
+        "DownloadCommand",
+        "Download packages.",
+    ),
+    "uninstall": CommandInfo(
+        "pip._internal.commands.uninstall",
+        "UninstallCommand",
+        "Uninstall packages.",
+    ),
+    "freeze": CommandInfo(
+        "pip._internal.commands.freeze",
+        "FreezeCommand",
+        "Output installed packages in requirements format.",
+    ),
+    "inspect": CommandInfo(
+        "pip._internal.commands.inspect",
+        "InspectCommand",
+        "Inspect the python environment.",
+    ),
+    "list": CommandInfo(
+        "pip._internal.commands.list",
+        "ListCommand",
+        "List installed packages.",
+    ),
+    "show": CommandInfo(
+        "pip._internal.commands.show",
+        "ShowCommand",
+        "Show information about installed packages.",
+    ),
+    "check": CommandInfo(
+        "pip._internal.commands.check",
+        "CheckCommand",
+        "Verify installed packages have compatible dependencies.",
+    ),
+    "config": CommandInfo(
+        "pip._internal.commands.configuration",
+        "ConfigurationCommand",
+        "Manage local and global configuration.",
+    ),
+    "search": CommandInfo(
+        "pip._internal.commands.search",
+        "SearchCommand",
+        "Search PyPI for packages.",
+    ),
+    "cache": CommandInfo(
+        "pip._internal.commands.cache",
+        "CacheCommand",
+        "Inspect and manage pip's wheel cache.",
+    ),
+    "index": CommandInfo(
+        "pip._internal.commands.index",
+        "IndexCommand",
+        "Inspect information available from package indexes.",
+    ),
+    "wheel": CommandInfo(
+        "pip._internal.commands.wheel",
+        "WheelCommand",
+        "Build wheels from your requirements.",
+    ),
+    "hash": CommandInfo(
+        "pip._internal.commands.hash",
+        "HashCommand",
+        "Compute hashes of package archives.",
+    ),
+    "completion": CommandInfo(
+        "pip._internal.commands.completion",
+        "CompletionCommand",
+        "A helper command used for command completion.",
+    ),
+    "debug": CommandInfo(
+        "pip._internal.commands.debug",
+        "DebugCommand",
+        "Show information useful for debugging.",
+    ),
+    "help": CommandInfo(
+        "pip._internal.commands.help",
+        "HelpCommand",
+        "Show help for commands.",
+    ),
+}
+
+
+def create_command(name: str, **kwargs: Any) -> Command:
+    """
+    Create an instance of the Command class with the given name.
+    """
+    module_path, class_name, summary = commands_dict[name]
+    module = importlib.import_module(module_path)
+    command_class = getattr(module, class_name)
+    command = command_class(name=name, summary=summary, **kwargs)
+
+    return command
+
+
+def get_similar_commands(name: str) -> Optional[str]:
+    """Command name auto-correct."""
+    from difflib import get_close_matches
+
+    name = name.lower()
+
+    close_commands = get_close_matches(name, commands_dict.keys())
+
+    if close_commands:
+        return close_commands[0]
+    else:
+        return None
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/cache.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/cache.py
new file mode 100644
index 0000000..c5f0330
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/cache.py
@@ -0,0 +1,223 @@
+import os
+import textwrap
+from optparse import Values
+from typing import Any, List
+
+import pip._internal.utils.filesystem as filesystem
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.exceptions import CommandError, PipError
+from pip._internal.utils.logging import getLogger
+
+logger = getLogger(__name__)
+
+
+class CacheCommand(Command):
+    """
+    Inspect and manage pip's wheel cache.
+
+    Subcommands:
+
+    - dir: Show the cache directory.
+    - info: Show information about the cache.
+    - list: List filenames of packages stored in the cache.
+    - remove: Remove one or more package from the cache.
+    - purge: Remove all items from the cache.
+
+    ``<pattern>`` can be a glob expression or a package name.
+    """
+
+    ignore_require_venv = True
+    usage = """
+        %prog dir
+        %prog info
+        %prog list [<pattern>] [--format=[human, abspath]]
+        %prog remove <pattern>
+        %prog purge
+    """
+
+    def add_options(self) -> None:
+
+        self.cmd_opts.add_option(
+            "--format",
+            action="store",
+            dest="list_format",
+            default="human",
+            choices=("human", "abspath"),
+            help="Select the output format among: human (default) or abspath",
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        handlers = {
+            "dir": self.get_cache_dir,
+            "info": self.get_cache_info,
+            "list": self.list_cache_items,
+            "remove": self.remove_cache_items,
+            "purge": self.purge_cache,
+        }
+
+        if not options.cache_dir:
+            logger.error("pip cache commands can not function since cache is disabled.")
+            return ERROR
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error(
+                "Need an action (%s) to perform.",
+                ", ".join(sorted(handlers)),
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def get_cache_dir(self, options: Values, args: List[Any]) -> None:
+        if args:
+            raise CommandError("Too many arguments")
+
+        logger.info(options.cache_dir)
+
+    def get_cache_info(self, options: Values, args: List[Any]) -> None:
+        if args:
+            raise CommandError("Too many arguments")
+
+        num_http_files = len(self._find_http_files(options))
+        num_packages = len(self._find_wheels(options, "*"))
+
+        http_cache_location = self._cache_dir(options, "http")
+        wheels_cache_location = self._cache_dir(options, "wheels")
+        http_cache_size = filesystem.format_directory_size(http_cache_location)
+        wheels_cache_size = filesystem.format_directory_size(wheels_cache_location)
+
+        message = (
+            textwrap.dedent(
+                """
+                    Package index page cache location: {http_cache_location}
+                    Package index page cache size: {http_cache_size}
+                    Number of HTTP files: {num_http_files}
+                    Locally built wheels location: {wheels_cache_location}
+                    Locally built wheels size: {wheels_cache_size}
+                    Number of locally built wheels: {package_count}
+                """
+            )
+            .format(
+                http_cache_location=http_cache_location,
+                http_cache_size=http_cache_size,
+                num_http_files=num_http_files,
+                wheels_cache_location=wheels_cache_location,
+                package_count=num_packages,
+                wheels_cache_size=wheels_cache_size,
+            )
+            .strip()
+        )
+
+        logger.info(message)
+
+    def list_cache_items(self, options: Values, args: List[Any]) -> None:
+        if len(args) > 1:
+            raise CommandError("Too many arguments")
+
+        if args:
+            pattern = args[0]
+        else:
+            pattern = "*"
+
+        files = self._find_wheels(options, pattern)
+        if options.list_format == "human":
+            self.format_for_human(files)
+        else:
+            self.format_for_abspath(files)
+
+    def format_for_human(self, files: List[str]) -> None:
+        if not files:
+            logger.info("No locally built wheels cached.")
+            return
+
+        results = []
+        for filename in files:
+            wheel = os.path.basename(filename)
+            size = filesystem.format_file_size(filename)
+            results.append(f" - {wheel} ({size})")
+        logger.info("Cache contents:\n")
+        logger.info("\n".join(sorted(results)))
+
+    def format_for_abspath(self, files: List[str]) -> None:
+        if not files:
+            return
+
+        results = []
+        for filename in files:
+            results.append(filename)
+
+        logger.info("\n".join(sorted(results)))
+
+    def remove_cache_items(self, options: Values, args: List[Any]) -> None:
+        if len(args) > 1:
+            raise CommandError("Too many arguments")
+
+        if not args:
+            raise CommandError("Please provide a pattern")
+
+        files = self._find_wheels(options, args[0])
+
+        no_matching_msg = "No matching packages"
+        if args[0] == "*":
+            # Only fetch http files if no specific pattern given
+            files += self._find_http_files(options)
+        else:
+            # Add the pattern to the log message
+            no_matching_msg += ' for pattern "{}"'.format(args[0])
+
+        if not files:
+            logger.warning(no_matching_msg)
+
+        for filename in files:
+            os.unlink(filename)
+            logger.verbose("Removed %s", filename)
+        logger.info("Files removed: %s", len(files))
+
+    def purge_cache(self, options: Values, args: List[Any]) -> None:
+        if args:
+            raise CommandError("Too many arguments")
+
+        return self.remove_cache_items(options, ["*"])
+
+    def _cache_dir(self, options: Values, subdir: str) -> str:
+        return os.path.join(options.cache_dir, subdir)
+
+    def _find_http_files(self, options: Values) -> List[str]:
+        http_dir = self._cache_dir(options, "http")
+        return filesystem.find_files(http_dir, "*")
+
+    def _find_wheels(self, options: Values, pattern: str) -> List[str]:
+        wheel_dir = self._cache_dir(options, "wheels")
+
+        # The wheel filename format, as specified in PEP 427, is:
+        #     {distribution}-{version}(-{build})?-{python}-{abi}-{platform}.whl
+        #
+        # Additionally, non-alphanumeric values in the distribution are
+        # normalized to underscores (_), meaning hyphens can never occur
+        # before `-{version}`.
+        #
+        # Given that information:
+        # - If the pattern we're given contains a hyphen (-), the user is
+        #   providing at least the version. Thus, we can just append `*.whl`
+        #   to match the rest of it.
+        # - If the pattern we're given doesn't contain a hyphen (-), the
+        #   user is only providing the name. Thus, we append `-*.whl` to
+        #   match the hyphen before the version, followed by anything else.
+        #
+        # PEP 427: https://www.python.org/dev/peps/pep-0427/
+        pattern = pattern + ("*.whl" if "-" in pattern else "-*.whl")
+
+        return filesystem.find_files(wheel_dir, pattern)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/check.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/check.py
new file mode 100644
index 0000000..3864220
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/check.py
@@ -0,0 +1,53 @@
+import logging
+from optparse import Values
+from typing import List
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.operations.check import (
+    check_package_set,
+    create_package_set_from_installed,
+)
+from pip._internal.utils.misc import write_output
+
+logger = logging.getLogger(__name__)
+
+
+class CheckCommand(Command):
+    """Verify installed packages have compatible dependencies."""
+
+    usage = """
+      %prog [options]"""
+
+    def run(self, options: Values, args: List[str]) -> int:
+
+        package_set, parsing_probs = create_package_set_from_installed()
+        missing, conflicting = check_package_set(package_set)
+
+        for project_name in missing:
+            version = package_set[project_name].version
+            for dependency in missing[project_name]:
+                write_output(
+                    "%s %s requires %s, which is not installed.",
+                    project_name,
+                    version,
+                    dependency[0],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name].version
+            for dep_name, dep_version, req in conflicting[project_name]:
+                write_output(
+                    "%s %s has requirement %s, but you have %s %s.",
+                    project_name,
+                    version,
+                    req,
+                    dep_name,
+                    dep_version,
+                )
+
+        if missing or conflicting or parsing_probs:
+            return ERROR
+        else:
+            write_output("No broken requirements found.")
+            return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/completion.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/completion.py
new file mode 100644
index 0000000..deaa308
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/completion.py
@@ -0,0 +1,126 @@
+import sys
+import textwrap
+from optparse import Values
+from typing import List
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.utils.misc import get_prog
+
+BASE_COMPLETION = """
+# pip {shell} completion start{script}# pip {shell} completion end
+"""
+
+COMPLETION_SCRIPTS = {
+    "bash": """
+        _pip_completion()
+        {{
+            COMPREPLY=( $( COMP_WORDS="${{COMP_WORDS[*]}}" \\
+                           COMP_CWORD=$COMP_CWORD \\
+                           PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) )
+        }}
+        complete -o default -F _pip_completion {prog}
+    """,
+    "zsh": """
+        function _pip_completion {{
+          local words cword
+          read -Ac words
+          read -cn cword
+          reply=( $( COMP_WORDS="$words[*]" \\
+                     COMP_CWORD=$(( cword-1 )) \\
+                     PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null ))
+        }}
+        compctl -K _pip_completion {prog}
+    """,
+    "fish": """
+        function __fish_complete_pip
+            set -lx COMP_WORDS (commandline -o) ""
+            set -lx COMP_CWORD ( \\
+                math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
+            )
+            set -lx PIP_AUTO_COMPLETE 1
+            string split \\  -- (eval $COMP_WORDS[1])
+        end
+        complete -fa "(__fish_complete_pip)" -c {prog}
+    """,
+    "powershell": """
+        if ((Test-Path Function:\\TabExpansion) -and -not `
+            (Test-Path Function:\\_pip_completeBackup)) {{
+            Rename-Item Function:\\TabExpansion _pip_completeBackup
+        }}
+        function TabExpansion($line, $lastWord) {{
+            $lastBlock = [regex]::Split($line, '[|;]')[-1].TrimStart()
+            if ($lastBlock.StartsWith("{prog} ")) {{
+                $Env:COMP_WORDS=$lastBlock
+                $Env:COMP_CWORD=$lastBlock.Split().Length - 1
+                $Env:PIP_AUTO_COMPLETE=1
+                (& {prog}).Split()
+                Remove-Item Env:COMP_WORDS
+                Remove-Item Env:COMP_CWORD
+                Remove-Item Env:PIP_AUTO_COMPLETE
+            }}
+            elseif (Test-Path Function:\\_pip_completeBackup) {{
+                # Fall back on existing tab expansion
+                _pip_completeBackup $line $lastWord
+            }}
+        }}
+    """,
+}
+
+
+class CompletionCommand(Command):
+    """A helper command to be used for command completion."""
+
+    ignore_require_venv = True
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "--bash",
+            "-b",
+            action="store_const",
+            const="bash",
+            dest="shell",
+            help="Emit completion code for bash",
+        )
+        self.cmd_opts.add_option(
+            "--zsh",
+            "-z",
+            action="store_const",
+            const="zsh",
+            dest="shell",
+            help="Emit completion code for zsh",
+        )
+        self.cmd_opts.add_option(
+            "--fish",
+            "-f",
+            action="store_const",
+            const="fish",
+            dest="shell",
+            help="Emit completion code for fish",
+        )
+        self.cmd_opts.add_option(
+            "--powershell",
+            "-p",
+            action="store_const",
+            const="powershell",
+            dest="shell",
+            help="Emit completion code for powershell",
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        """Prints the completion code of the given shell"""
+        shells = COMPLETION_SCRIPTS.keys()
+        shell_options = ["--" + shell for shell in sorted(shells)]
+        if options.shell in shells:
+            script = textwrap.dedent(
+                COMPLETION_SCRIPTS.get(options.shell, "").format(prog=get_prog())
+            )
+            print(BASE_COMPLETION.format(script=script, shell=options.shell))
+            return SUCCESS
+        else:
+            sys.stderr.write(
+                "ERROR: You must pass {}\n".format(" or ".join(shell_options))
+            )
+            return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/configuration.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/configuration.py
new file mode 100644
index 0000000..84b134e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/configuration.py
@@ -0,0 +1,282 @@
+import logging
+import os
+import subprocess
+from optparse import Values
+from typing import Any, List, Optional
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.configuration import (
+    Configuration,
+    Kind,
+    get_configuration_files,
+    kinds,
+)
+from pip._internal.exceptions import PipError
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_prog, write_output
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigurationCommand(Command):
+    """
+    Manage local and global configuration.
+
+    Subcommands:
+
+    - list: List the active configuration (or from the file specified)
+    - edit: Edit the configuration file in an editor
+    - get: Get the value associated with command.option
+    - set: Set the command.option=value
+    - unset: Unset the value associated with command.option
+    - debug: List the configuration files and values defined under them
+
+    Configuration keys should be dot separated command and option name,
+    with the special prefix "global" affecting any command. For example,
+    "pip config set global.index-url https://example.org/" would configure
+    the index url for all commands, but "pip config set download.timeout 10"
+    would configure a 10 second timeout only for "pip download" commands.
+
+    If none of --user, --global and --site are passed, a virtual
+    environment configuration file is used if one is active and the file
+    exists. Otherwise, all modifications happen to the user file by
+    default.
+    """
+
+    ignore_require_venv = True
+    usage = """
+        %prog [<file-option>] list
+        %prog [<file-option>] [--editor <editor-path>] edit
+
+        %prog [<file-option>] get command.option
+        %prog [<file-option>] set command.option value
+        %prog [<file-option>] unset command.option
+        %prog [<file-option>] debug
+    """
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "--editor",
+            dest="editor",
+            action="store",
+            default=None,
+            help=(
+                "Editor to use to edit the file. Uses VISUAL or EDITOR "
+                "environment variables if not provided."
+            ),
+        )
+
+        self.cmd_opts.add_option(
+            "--global",
+            dest="global_file",
+            action="store_true",
+            default=False,
+            help="Use the system-wide configuration file only",
+        )
+
+        self.cmd_opts.add_option(
+            "--user",
+            dest="user_file",
+            action="store_true",
+            default=False,
+            help="Use the user configuration file only",
+        )
+
+        self.cmd_opts.add_option(
+            "--site",
+            dest="site_file",
+            action="store_true",
+            default=False,
+            help="Use the current environment configuration file only",
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        handlers = {
+            "list": self.list_values,
+            "edit": self.open_in_editor,
+            "get": self.get_name,
+            "set": self.set_name_value,
+            "unset": self.unset_name,
+            "debug": self.list_config_values,
+        }
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error(
+                "Need an action (%s) to perform.",
+                ", ".join(sorted(handlers)),
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Determine which configuration files are to be loaded
+        #    Depends on whether the command is modifying.
+        try:
+            load_only = self._determine_file(
+                options, need_value=(action in ["get", "set", "unset", "edit"])
+            )
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        # Load a new configuration
+        self.configuration = Configuration(
+            isolated=options.isolated_mode, load_only=load_only
+        )
+        self.configuration.load()
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def _determine_file(self, options: Values, need_value: bool) -> Optional[Kind]:
+        file_options = [
+            key
+            for key, value in (
+                (kinds.USER, options.user_file),
+                (kinds.GLOBAL, options.global_file),
+                (kinds.SITE, options.site_file),
+            )
+            if value
+        ]
+
+        if not file_options:
+            if not need_value:
+                return None
+            # Default to user, unless there's a site file.
+            elif any(
+                os.path.exists(site_config_file)
+                for site_config_file in get_configuration_files()[kinds.SITE]
+            ):
+                return kinds.SITE
+            else:
+                return kinds.USER
+        elif len(file_options) == 1:
+            return file_options[0]
+
+        raise PipError(
+            "Need exactly one file to operate upon "
+            "(--user, --site, --global) to perform."
+        )
+
+    def list_values(self, options: Values, args: List[str]) -> None:
+        self._get_n_args(args, "list", n=0)
+
+        for key, value in sorted(self.configuration.items()):
+            write_output("%s=%r", key, value)
+
+    def get_name(self, options: Values, args: List[str]) -> None:
+        key = self._get_n_args(args, "get [name]", n=1)
+        value = self.configuration.get_value(key)
+
+        write_output("%s", value)
+
+    def set_name_value(self, options: Values, args: List[str]) -> None:
+        key, value = self._get_n_args(args, "set [name] [value]", n=2)
+        self.configuration.set_value(key, value)
+
+        self._save_configuration()
+
+    def unset_name(self, options: Values, args: List[str]) -> None:
+        key = self._get_n_args(args, "unset [name]", n=1)
+        self.configuration.unset_value(key)
+
+        self._save_configuration()
+
+    def list_config_values(self, options: Values, args: List[str]) -> None:
+        """List config key-value pairs across different config files"""
+        self._get_n_args(args, "debug", n=0)
+
+        self.print_env_var_values()
+        # Iterate over config files and print if they exist, and the
+        # key-value pairs present in them if they do
+        for variant, files in sorted(self.configuration.iter_config_files()):
+            write_output("%s:", variant)
+            for fname in files:
+                with indent_log():
+                    file_exists = os.path.exists(fname)
+                    write_output("%s, exists: %r", fname, file_exists)
+                    if file_exists:
+                        self.print_config_file_values(variant)
+
+    def print_config_file_values(self, variant: Kind) -> None:
+        """Get key-value pairs from the file of a variant"""
+        for name, value in self.configuration.get_values_in_config(variant).items():
+            with indent_log():
+                write_output("%s: %s", name, value)
+
+    def print_env_var_values(self) -> None:
+        """Get key-values pairs present as environment variables"""
+        write_output("%s:", "env_var")
+        with indent_log():
+            for key, value in sorted(self.configuration.get_environ_vars()):
+                env_var = f"PIP_{key.upper()}"
+                write_output("%s=%r", env_var, value)
+
+    def open_in_editor(self, options: Values, args: List[str]) -> None:
+        editor = self._determine_editor(options)
+
+        fname = self.configuration.get_file_to_edit()
+        if fname is None:
+            raise PipError("Could not determine appropriate file.")
+        elif '"' in fname:
+            # This shouldn't happen, unless we see a username like that.
+            # If that happens, we'd appreciate a pull request fixing this.
+            raise PipError(
+                f'Can not open an editor for a file name containing "\n{fname}'
+            )
+
+        try:
+            subprocess.check_call(f'{editor} "{fname}"', shell=True)
+        except FileNotFoundError as e:
+            if not e.filename:
+                e.filename = editor
+            raise
+        except subprocess.CalledProcessError as e:
+            raise PipError(
+                "Editor Subprocess exited with exit code {}".format(e.returncode)
+            )
+
+    def _get_n_args(self, args: List[str], example: str, n: int) -> Any:
+        """Helper to make sure the command got the right number of arguments"""
+        if len(args) != n:
+            msg = (
+                "Got unexpected number of arguments, expected {}. "
+                '(example: "{} config {}")'
+            ).format(n, get_prog(), example)
+            raise PipError(msg)
+
+        if n == 1:
+            return args[0]
+        else:
+            return args
+
+    def _save_configuration(self) -> None:
+        # We successfully ran a modifying command. Need to save the
+        # configuration.
+        try:
+            self.configuration.save()
+        except Exception:
+            logger.exception(
+                "Unable to save configuration. Please report this as a bug."
+            )
+            raise PipError("Internal Error.")
+
+    def _determine_editor(self, options: Values) -> str:
+        if options.editor is not None:
+            return options.editor
+        elif "VISUAL" in os.environ:
+            return os.environ["VISUAL"]
+        elif "EDITOR" in os.environ:
+            return os.environ["EDITOR"]
+        else:
+            raise PipError("Could not determine editor to use.")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/debug.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/debug.py
new file mode 100644
index 0000000..6fad1fe
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/debug.py
@@ -0,0 +1,199 @@
+import importlib.resources
+import locale
+import logging
+import os
+import sys
+from optparse import Values
+from types import ModuleType
+from typing import Any, Dict, List, Optional
+
+import pip._vendor
+from pip._vendor.certifi import where
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.configuration import Configuration
+from pip._internal.metadata import get_environment
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_pip_version
+
+logger = logging.getLogger(__name__)
+
+
+def show_value(name: str, value: Any) -> None:
+    logger.info("%s: %s", name, value)
+
+
+def show_sys_implementation() -> None:
+    logger.info("sys.implementation:")
+    implementation_name = sys.implementation.name
+    with indent_log():
+        show_value("name", implementation_name)
+
+
+def create_vendor_txt_map() -> Dict[str, str]:
+    with importlib.resources.open_text("pip._vendor", "vendor.txt") as f:
+        # Purge non version specifying lines.
+        # Also, remove any space prefix or suffixes (including comments).
+        lines = [
+            line.strip().split(" ", 1)[0] for line in f.readlines() if "==" in line
+        ]
+
+    # Transform into "module" -> version dict.
+    return dict(line.split("==", 1) for line in lines)
+
+
+def get_module_from_module_name(module_name: str) -> ModuleType:
+    # Module name can be uppercase in vendor.txt for some reason...
+    module_name = module_name.lower()
+    # PATCH: setuptools is actually only pkg_resources.
+    if module_name == "setuptools":
+        module_name = "pkg_resources"
+
+    __import__(f"pip._vendor.{module_name}", globals(), locals(), level=0)
+    return getattr(pip._vendor, module_name)
+
+
+def get_vendor_version_from_module(module_name: str) -> Optional[str]:
+    module = get_module_from_module_name(module_name)
+    version = getattr(module, "__version__", None)
+
+    if not version:
+        # Try to find version in debundled module info.
+        assert module.__file__ is not None
+        env = get_environment([os.path.dirname(module.__file__)])
+        dist = env.get_distribution(module_name)
+        if dist:
+            version = str(dist.version)
+
+    return version
+
+
+def show_actual_vendor_versions(vendor_txt_versions: Dict[str, str]) -> None:
+    """Log the actual version and print extra info if there is
+    a conflict or if the actual version could not be imported.
+    """
+    for module_name, expected_version in vendor_txt_versions.items():
+        extra_message = ""
+        actual_version = get_vendor_version_from_module(module_name)
+        if not actual_version:
+            extra_message = (
+                " (Unable to locate actual module version, using"
+                " vendor.txt specified version)"
+            )
+            actual_version = expected_version
+        elif parse_version(actual_version) != parse_version(expected_version):
+            extra_message = (
+                " (CONFLICT: vendor.txt suggests version should"
+                " be {})".format(expected_version)
+            )
+        logger.info("%s==%s%s", module_name, actual_version, extra_message)
+
+
+def show_vendor_versions() -> None:
+    logger.info("vendored library versions:")
+
+    vendor_txt_versions = create_vendor_txt_map()
+    with indent_log():
+        show_actual_vendor_versions(vendor_txt_versions)
+
+
+def show_tags(options: Values) -> None:
+    tag_limit = 10
+
+    target_python = make_target_python(options)
+    tags = target_python.get_tags()
+
+    # Display the target options that were explicitly provided.
+    formatted_target = target_python.format_given()
+    suffix = ""
+    if formatted_target:
+        suffix = f" (target: {formatted_target})"
+
+    msg = "Compatible tags: {}{}".format(len(tags), suffix)
+    logger.info(msg)
+
+    if options.verbose < 1 and len(tags) > tag_limit:
+        tags_limited = True
+        tags = tags[:tag_limit]
+    else:
+        tags_limited = False
+
+    with indent_log():
+        for tag in tags:
+            logger.info(str(tag))
+
+        if tags_limited:
+            msg = (
+                "...\n[First {tag_limit} tags shown. Pass --verbose to show all.]"
+            ).format(tag_limit=tag_limit)
+            logger.info(msg)
+
+
+def ca_bundle_info(config: Configuration) -> str:
+    levels = set()
+    for key, _ in config.items():
+        levels.add(key.split(".")[0])
+
+    if not levels:
+        return "Not specified"
+
+    levels_that_override_global = ["install", "wheel", "download"]
+    global_overriding_level = [
+        level for level in levels if level in levels_that_override_global
+    ]
+    if not global_overriding_level:
+        return "global"
+
+    if "global" in levels:
+        levels.remove("global")
+    return ", ".join(levels)
+
+
+class DebugCommand(Command):
+    """
+    Display debug information.
+    """
+
+    usage = """
+      %prog <options>"""
+    ignore_require_venv = True
+
+    def add_options(self) -> None:
+        cmdoptions.add_target_python_options(self.cmd_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+        self.parser.config.load()
+
+    def run(self, options: Values, args: List[str]) -> int:
+        logger.warning(
+            "This command is only meant for debugging. "
+            "Do not use this with automation for parsing and getting these "
+            "details, since the output and options of this command may "
+            "change without notice."
+        )
+        show_value("pip version", get_pip_version())
+        show_value("sys.version", sys.version)
+        show_value("sys.executable", sys.executable)
+        show_value("sys.getdefaultencoding", sys.getdefaultencoding())
+        show_value("sys.getfilesystemencoding", sys.getfilesystemencoding())
+        show_value(
+            "locale.getpreferredencoding",
+            locale.getpreferredencoding(),
+        )
+        show_value("sys.platform", sys.platform)
+        show_sys_implementation()
+
+        show_value("'cert' config value", ca_bundle_info(self.parser.config))
+        show_value("REQUESTS_CA_BUNDLE", os.environ.get("REQUESTS_CA_BUNDLE"))
+        show_value("CURL_CA_BUNDLE", os.environ.get("CURL_CA_BUNDLE"))
+        show_value("pip._vendor.certifi.where()", where())
+        show_value("pip._vendor.DEBUNDLED", pip._vendor.DEBUNDLED)
+
+        show_vendor_versions()
+
+        show_tags(options)
+
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/download.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/download.py
new file mode 100644
index 0000000..4132e08
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/download.py
@@ -0,0 +1,149 @@
+import logging
+import os
+from optparse import Values
+from typing import List
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import RequirementCommand, with_cleanup
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.operations.build.build_tracker import get_build_tracker
+from pip._internal.req.req_install import (
+    LegacySetupPyOptionsCheckMode,
+    check_legacy_setup_py_options,
+)
+from pip._internal.utils.misc import ensure_dir, normalize_path, write_output
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+class DownloadCommand(RequirementCommand):
+    """
+    Download packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports downloading from "requirements files", which provide
+    an easy way to specify a whole environment to be downloaded.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] <vcs project url> ...
+      %prog [options] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.global_options())
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(cmdoptions.src())
+        self.cmd_opts.add_option(cmdoptions.pre())
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+
+        self.cmd_opts.add_option(
+            "-d",
+            "--dest",
+            "--destination-dir",
+            "--destination-directory",
+            dest="download_dir",
+            metavar="dir",
+            default=os.curdir,
+            help="Download packages into <dir>.",
+        )
+
+        cmdoptions.add_target_python_options(self.cmd_opts)
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    @with_cleanup
+    def run(self, options: Values, args: List[str]) -> int:
+
+        options.ignore_installed = True
+        # editable doesn't really make sense for `pip download`, but the bowels
+        # of the RequirementSet code require that property.
+        options.editables = []
+
+        cmdoptions.check_dist_restriction(options)
+
+        options.download_dir = normalize_path(options.download_dir)
+        ensure_dir(options.download_dir)
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+            ignore_requires_python=options.ignore_requires_python,
+        )
+
+        build_tracker = self.enter_context(get_build_tracker())
+
+        directory = TempDirectory(
+            delete=not options.no_clean,
+            kind="download",
+            globally_managed=True,
+        )
+
+        reqs = self.get_requirements(args, options, finder, session)
+        check_legacy_setup_py_options(
+            options, reqs, LegacySetupPyOptionsCheckMode.DOWNLOAD
+        )
+
+        preparer = self.make_requirement_preparer(
+            temp_build_dir=directory,
+            options=options,
+            build_tracker=build_tracker,
+            session=session,
+            finder=finder,
+            download_dir=options.download_dir,
+            use_user_site=False,
+            verbosity=self.verbosity,
+        )
+
+        resolver = self.make_resolver(
+            preparer=preparer,
+            finder=finder,
+            options=options,
+            ignore_requires_python=options.ignore_requires_python,
+            use_pep517=options.use_pep517,
+            py_version_info=options.python_version,
+        )
+
+        self.trace_basic_info(finder)
+
+        requirement_set = resolver.resolve(reqs, check_supported_wheels=True)
+
+        downloaded: List[str] = []
+        for req in requirement_set.requirements.values():
+            if req.satisfied_by is None:
+                assert req.name is not None
+                preparer.save_linked_requirement(req)
+                downloaded.append(req.name)
+        if downloaded:
+            write_output("Successfully downloaded %s", " ".join(downloaded))
+
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/freeze.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/freeze.py
new file mode 100644
index 0000000..5fa6d39
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/freeze.py
@@ -0,0 +1,97 @@
+import sys
+from optparse import Values
+from typing import List
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.operations.freeze import freeze
+from pip._internal.utils.compat import stdlib_pkgs
+
+DEV_PKGS = {"pip", "setuptools", "distribute", "wheel"}
+
+
+class FreezeCommand(Command):
+    """
+    Output installed packages in requirements format.
+
+    packages are listed in a case-insensitive sorted order.
+    """
+
+    usage = """
+      %prog [options]"""
+    log_streams = ("ext://sys.stderr", "ext://sys.stderr")
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-r",
+            "--requirement",
+            dest="requirements",
+            action="append",
+            default=[],
+            metavar="file",
+            help=(
+                "Use the order in the given requirements file and its "
+                "comments when generating output. This option can be "
+                "used multiple times."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "-l",
+            "--local",
+            dest="local",
+            action="store_true",
+            default=False,
+            help=(
+                "If in a virtualenv that has global access, do not output "
+                "globally-installed packages."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--user",
+            dest="user",
+            action="store_true",
+            default=False,
+            help="Only output packages installed in user-site.",
+        )
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            "--all",
+            dest="freeze_all",
+            action="store_true",
+            help=(
+                "Do not skip these packages in the output:"
+                " {}".format(", ".join(DEV_PKGS))
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--exclude-editable",
+            dest="exclude_editable",
+            action="store_true",
+            help="Exclude editable package from output.",
+        )
+        self.cmd_opts.add_option(cmdoptions.list_exclude())
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        skip = set(stdlib_pkgs)
+        if not options.freeze_all:
+            skip.update(DEV_PKGS)
+
+        if options.excludes:
+            skip.update(options.excludes)
+
+        cmdoptions.check_list_path_option(options)
+
+        for line in freeze(
+            requirement=options.requirements,
+            local_only=options.local,
+            user_only=options.user,
+            paths=options.path,
+            isolated=options.isolated_mode,
+            skip=skip,
+            exclude_editable=options.exclude_editable,
+        ):
+            sys.stdout.write(line + "\n")
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/hash.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/hash.py
new file mode 100644
index 0000000..042dac8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/hash.py
@@ -0,0 +1,59 @@
+import hashlib
+import logging
+import sys
+from optparse import Values
+from typing import List
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
+from pip._internal.utils.misc import read_chunks, write_output
+
+logger = logging.getLogger(__name__)
+
+
+class HashCommand(Command):
+    """
+    Compute a hash of a local package archive.
+
+    These can be used with --hash in a requirements file to do repeatable
+    installs.
+    """
+
+    usage = "%prog [options] <file> ..."
+    ignore_require_venv = True
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-a",
+            "--algorithm",
+            dest="algorithm",
+            choices=STRONG_HASHES,
+            action="store",
+            default=FAVORITE_HASH,
+            help="The hash algorithm to use: one of {}".format(
+                ", ".join(STRONG_HASHES)
+            ),
+        )
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        if not args:
+            self.parser.print_usage(sys.stderr)
+            return ERROR
+
+        algorithm = options.algorithm
+        for path in args:
+            write_output(
+                "%s:\n--hash=%s:%s", path, algorithm, _hash_of_file(path, algorithm)
+            )
+        return SUCCESS
+
+
+def _hash_of_file(path: str, algorithm: str) -> str:
+    """Return the hash digest of a file."""
+    with open(path, "rb") as archive:
+        hash = hashlib.new(algorithm)
+        for chunk in read_chunks(archive):
+            hash.update(chunk)
+    return hash.hexdigest()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/help.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/help.py
new file mode 100644
index 0000000..6206631
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/help.py
@@ -0,0 +1,41 @@
+from optparse import Values
+from typing import List
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+
+
+class HelpCommand(Command):
+    """Show help for commands"""
+
+    usage = """
+      %prog <command>"""
+    ignore_require_venv = True
+
+    def run(self, options: Values, args: List[str]) -> int:
+        from pip._internal.commands import (
+            commands_dict,
+            create_command,
+            get_similar_commands,
+        )
+
+        try:
+            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            cmd_name = args[0]  # the command we need help for
+        except IndexError:
+            return SUCCESS
+
+        if cmd_name not in commands_dict:
+            guess = get_similar_commands(cmd_name)
+
+            msg = [f'unknown command "{cmd_name}"']
+            if guess:
+                msg.append(f'maybe you meant "{guess}"')
+
+            raise CommandError(" - ".join(msg))
+
+        command = create_command(cmd_name)
+        command.parser.print_help()
+
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/index.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/index.py
new file mode 100644
index 0000000..b4bf0ac
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/index.py
@@ -0,0 +1,138 @@
+import logging
+from optparse import Values
+from typing import Any, Iterable, List, Optional, Union
+
+from pip._vendor.packaging.version import LegacyVersion, Version
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import IndexGroupCommand
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.commands.search import print_dist_installation_info
+from pip._internal.exceptions import CommandError, DistributionNotFound, PipError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.network.session import PipSession
+from pip._internal.utils.misc import write_output
+
+logger = logging.getLogger(__name__)
+
+
+class IndexCommand(IndexGroupCommand):
+    """
+    Inspect information available from package indexes.
+    """
+
+    usage = """
+        %prog versions <package>
+    """
+
+    def add_options(self) -> None:
+        cmdoptions.add_target_python_options(self.cmd_opts)
+
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        self.cmd_opts.add_option(cmdoptions.pre())
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        handlers = {
+            "versions": self.get_available_package_versions,
+        }
+
+        logger.warning(
+            "pip index is currently an experimental command. "
+            "It may be removed/changed in a future release "
+            "without prior warning."
+        )
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error(
+                "Need an action (%s) to perform.",
+                ", ".join(sorted(handlers)),
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def _build_package_finder(
+        self,
+        options: Values,
+        session: PipSession,
+        target_python: Optional[TargetPython] = None,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> PackageFinder:
+        """
+        Create a package finder appropriate to the index command.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+
+        # Pass allow_yanked=False to ignore yanked versions.
+        selection_prefs = SelectionPreferences(
+            allow_yanked=False,
+            allow_all_prereleases=options.pre,
+            ignore_requires_python=ignore_requires_python,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+            target_python=target_python,
+        )
+
+    def get_available_package_versions(self, options: Values, args: List[Any]) -> None:
+        if len(args) != 1:
+            raise CommandError("You need to specify exactly one argument")
+
+        target_python = cmdoptions.make_target_python(options)
+        query = args[0]
+
+        with self._build_session(options) as session:
+            finder = self._build_package_finder(
+                options=options,
+                session=session,
+                target_python=target_python,
+                ignore_requires_python=options.ignore_requires_python,
+            )
+
+            versions: Iterable[Union[LegacyVersion, Version]] = (
+                candidate.version for candidate in finder.find_all_candidates(query)
+            )
+
+            if not options.pre:
+                # Remove prereleases
+                versions = (
+                    version for version in versions if not version.is_prerelease
+                )
+            versions = set(versions)
+
+            if not versions:
+                raise DistributionNotFound(
+                    "No matching distribution found for {}".format(query)
+                )
+
+            formatted_versions = [str(ver) for ver in sorted(versions, reverse=True)]
+            latest = formatted_versions[0]
+
+        write_output("{} ({})".format(query, latest))
+        write_output("Available versions: {}".format(", ".join(formatted_versions)))
+        print_dist_installation_info(query, latest)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/inspect.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/inspect.py
new file mode 100644
index 0000000..a4e3599
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/inspect.py
@@ -0,0 +1,97 @@
+import logging
+from optparse import Values
+from typing import Any, Dict, List
+
+from pip._vendor.packaging.markers import default_environment
+from pip._vendor.rich import print_json
+
+from pip import __version__
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.metadata import BaseDistribution, get_environment
+from pip._internal.utils.compat import stdlib_pkgs
+from pip._internal.utils.urls import path_to_url
+
+logger = logging.getLogger(__name__)
+
+
+class InspectCommand(Command):
+    """
+    Inspect the content of a Python environment and produce a report in JSON format.
+    """
+
+    ignore_require_venv = True
+    usage = """
+      %prog [options]"""
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "--local",
+            action="store_true",
+            default=False,
+            help=(
+                "If in a virtualenv that has global access, do not list "
+                "globally-installed packages."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--user",
+            dest="user",
+            action="store_true",
+            default=False,
+            help="Only output packages installed in user-site.",
+        )
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        logger.warning(
+            "pip inspect is currently an experimental command. "
+            "The output format may change in a future release without prior warning."
+        )
+
+        cmdoptions.check_list_path_option(options)
+        dists = get_environment(options.path).iter_installed_distributions(
+            local_only=options.local,
+            user_only=options.user,
+            skip=set(stdlib_pkgs),
+        )
+        output = {
+            "version": "0",
+            "pip_version": __version__,
+            "installed": [self._dist_to_dict(dist) for dist in dists],
+            "environment": default_environment(),
+            # TODO tags? scheme?
+        }
+        print_json(data=output)
+        return SUCCESS
+
+    def _dist_to_dict(self, dist: BaseDistribution) -> Dict[str, Any]:
+        res: Dict[str, Any] = {
+            "metadata": dist.metadata_dict,
+            "metadata_location": dist.info_location,
+        }
+        # direct_url. Note that we don't have download_info (as in the installation
+        # report) since it is not recorded in installed metadata.
+        direct_url = dist.direct_url
+        if direct_url is not None:
+            res["direct_url"] = direct_url.to_dict()
+        else:
+            # Emulate direct_url for legacy editable installs.
+            editable_project_location = dist.editable_project_location
+            if editable_project_location is not None:
+                res["direct_url"] = {
+                    "url": path_to_url(editable_project_location),
+                    "dir_info": {
+                        "editable": True,
+                    },
+                }
+        # installer
+        installer = dist.installer
+        if dist.installer:
+            res["installer"] = installer
+        # requested
+        if dist.installed_with_dist_info:
+            res["requested"] = dist.requested
+        return res
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/install.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/install.py
new file mode 100644
index 0000000..e081c27
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/install.py
@@ -0,0 +1,860 @@
+import errno
+import json
+import operator
+import os
+import shutil
+import site
+from optparse import SUPPRESS_HELP, Values
+from typing import Iterable, List, Optional
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.rich import print_json
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import (
+    RequirementCommand,
+    warn_if_run_as_root,
+    with_cleanup,
+)
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.exceptions import CommandError, InstallationError
+from pip._internal.locations import get_scheme
+from pip._internal.metadata import get_environment
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.installation_report import InstallationReport
+from pip._internal.operations.build.build_tracker import get_build_tracker
+from pip._internal.operations.check import ConflictDetails, check_install_conflicts
+from pip._internal.req import install_given_reqs
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    LegacySetupPyOptionsCheckMode,
+    check_legacy_setup_py_options,
+)
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.deprecation import (
+    LegacyInstallReasonFailedBdistWheel,
+    deprecated,
+)
+from pip._internal.utils.distutils_args import parse_distutils_args
+from pip._internal.utils.filesystem import test_writable_dir
+from pip._internal.utils.logging import getLogger
+from pip._internal.utils.misc import (
+    ensure_dir,
+    get_pip_version,
+    protect_pip_from_modification_on_windows,
+    write_output,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.virtualenv import (
+    running_under_virtualenv,
+    virtualenv_no_global,
+)
+from pip._internal.wheel_builder import (
+    BdistWheelAllowedPredicate,
+    build,
+    should_build_for_install_command,
+)
+
+logger = getLogger(__name__)
+
+
+def get_check_bdist_wheel_allowed(
+    format_control: FormatControl,
+) -> BdistWheelAllowedPredicate:
+    def check_binary_allowed(req: InstallRequirement) -> bool:
+        canonical_name = canonicalize_name(req.name or "")
+        allowed_formats = format_control.get_allowed_formats(canonical_name)
+        return "binary" in allowed_formats
+
+    return check_binary_allowed
+
+
+class InstallCommand(RequirementCommand):
+    """
+    Install packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports installing from "requirements files", which provide
+    an easy way to specify a whole environment to be installed.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.pre())
+
+        self.cmd_opts.add_option(cmdoptions.editable())
+        self.cmd_opts.add_option(
+            "--dry-run",
+            action="store_true",
+            dest="dry_run",
+            default=False,
+            help=(
+                "Don't actually install anything, just print what would be. "
+                "Can be used in combination with --ignore-installed "
+                "to 'resolve' the requirements."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "-t",
+            "--target",
+            dest="target_dir",
+            metavar="dir",
+            default=None,
+            help=(
+                "Install packages into <dir>. "
+                "By default this will not replace existing files/folders in "
+                "<dir>. Use --upgrade to replace existing packages in <dir> "
+                "with new versions."
+            ),
+        )
+        cmdoptions.add_target_python_options(self.cmd_opts)
+
+        self.cmd_opts.add_option(
+            "--user",
+            dest="use_user_site",
+            action="store_true",
+            help=(
+                "Install to the Python user install directory for your "
+                "platform. Typically ~/.local/, or %APPDATA%\\Python on "
+                "Windows. (See the Python documentation for site.USER_BASE "
+                "for full details.)"
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--no-user",
+            dest="use_user_site",
+            action="store_false",
+            help=SUPPRESS_HELP,
+        )
+        self.cmd_opts.add_option(
+            "--root",
+            dest="root_path",
+            metavar="dir",
+            default=None,
+            help="Install everything relative to this alternate root directory.",
+        )
+        self.cmd_opts.add_option(
+            "--prefix",
+            dest="prefix_path",
+            metavar="dir",
+            default=None,
+            help=(
+                "Installation prefix where lib, bin and other top-level "
+                "folders are placed"
+            ),
+        )
+
+        self.cmd_opts.add_option(cmdoptions.src())
+
+        self.cmd_opts.add_option(
+            "-U",
+            "--upgrade",
+            dest="upgrade",
+            action="store_true",
+            help=(
+                "Upgrade all specified packages to the newest available "
+                "version. The handling of dependencies depends on the "
+                "upgrade-strategy used."
+            ),
+        )
+
+        self.cmd_opts.add_option(
+            "--upgrade-strategy",
+            dest="upgrade_strategy",
+            default="only-if-needed",
+            choices=["only-if-needed", "eager"],
+            help=(
+                "Determines how dependency upgrading should be handled "
+                "[default: %default]. "
+                '"eager" - dependencies are upgraded regardless of '
+                "whether the currently installed version satisfies the "
+                "requirements of the upgraded package(s). "
+                '"only-if-needed" -  are upgraded only when they do not '
+                "satisfy the requirements of the upgraded package(s)."
+            ),
+        )
+
+        self.cmd_opts.add_option(
+            "--force-reinstall",
+            dest="force_reinstall",
+            action="store_true",
+            help="Reinstall all packages even if they are already up-to-date.",
+        )
+
+        self.cmd_opts.add_option(
+            "-I",
+            "--ignore-installed",
+            dest="ignore_installed",
+            action="store_true",
+            help=(
+                "Ignore the installed packages, overwriting them. "
+                "This can break your system if the existing package "
+                "is of a different version or was installed "
+                "with a different package manager!"
+            ),
+        )
+
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
+
+        self.cmd_opts.add_option(cmdoptions.config_settings())
+        self.cmd_opts.add_option(cmdoptions.install_options())
+        self.cmd_opts.add_option(cmdoptions.global_options())
+
+        self.cmd_opts.add_option(
+            "--compile",
+            action="store_true",
+            dest="compile",
+            default=True,
+            help="Compile Python source files to bytecode",
+        )
+
+        self.cmd_opts.add_option(
+            "--no-compile",
+            action="store_false",
+            dest="compile",
+            help="Do not compile Python source files to bytecode",
+        )
+
+        self.cmd_opts.add_option(
+            "--no-warn-script-location",
+            action="store_false",
+            dest="warn_script_location",
+            default=True,
+            help="Do not warn when installing scripts outside PATH",
+        )
+        self.cmd_opts.add_option(
+            "--no-warn-conflicts",
+            action="store_false",
+            dest="warn_about_conflicts",
+            default=True,
+            help="Do not warn about broken dependencies",
+        )
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+        self.cmd_opts.add_option(cmdoptions.root_user_action())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+        self.cmd_opts.add_option(
+            "--report",
+            dest="json_report_file",
+            metavar="file",
+            default=None,
+            help=(
+                "Generate a JSON file describing what pip did to install "
+                "the provided requirements. "
+                "Can be used in combination with --dry-run and --ignore-installed "
+                "to 'resolve' the requirements. "
+                "When - is used as file name it writes to stdout. "
+                "When writing to stdout, please combine with the --quiet option "
+                "to avoid mixing pip logging output with JSON output."
+            ),
+        )
+
+    @with_cleanup
+    def run(self, options: Values, args: List[str]) -> int:
+        if options.use_user_site and options.target_dir is not None:
+            raise CommandError("Can not combine '--user' and '--target'")
+
+        upgrade_strategy = "to-satisfy-only"
+        if options.upgrade:
+            upgrade_strategy = options.upgrade_strategy
+
+        cmdoptions.check_dist_restriction(options, check_target=True)
+
+        install_options = options.install_options or []
+
+        logger.verbose("Using %s", get_pip_version())
+        options.use_user_site = decide_user_install(
+            options.use_user_site,
+            prefix_path=options.prefix_path,
+            target_dir=options.target_dir,
+            root_path=options.root_path,
+            isolated_mode=options.isolated_mode,
+        )
+
+        target_temp_dir: Optional[TempDirectory] = None
+        target_temp_dir_path: Optional[str] = None
+        if options.target_dir:
+            options.ignore_installed = True
+            options.target_dir = os.path.abspath(options.target_dir)
+            if (
+                # fmt: off
+                os.path.exists(options.target_dir) and
+                not os.path.isdir(options.target_dir)
+                # fmt: on
+            ):
+                raise CommandError(
+                    "Target path exists but is not a directory, will not continue."
+                )
+
+            # Create a target directory for using with the target option
+            target_temp_dir = TempDirectory(kind="target")
+            target_temp_dir_path = target_temp_dir.path
+            self.enter_context(target_temp_dir)
+
+        global_options = options.global_options or []
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+            ignore_requires_python=options.ignore_requires_python,
+        )
+        build_tracker = self.enter_context(get_build_tracker())
+
+        directory = TempDirectory(
+            delete=not options.no_clean,
+            kind="install",
+            globally_managed=True,
+        )
+
+        try:
+            reqs = self.get_requirements(args, options, finder, session)
+            check_legacy_setup_py_options(
+                options, reqs, LegacySetupPyOptionsCheckMode.INSTALL
+            )
+
+            if "no-binary-enable-wheel-cache" in options.features_enabled:
+                # TODO: remove format_control from WheelCache when the deprecation cycle
+                # is over
+                wheel_cache = WheelCache(options.cache_dir)
+            else:
+                if options.format_control.no_binary:
+                    deprecated(
+                        reason=(
+                            "--no-binary currently disables reading from "
+                            "the cache of locally built wheels. In the future "
+                            "--no-binary will not influence the wheel cache."
+                        ),
+                        replacement="to use the --no-cache-dir option",
+                        feature_flag="no-binary-enable-wheel-cache",
+                        issue=11453,
+                        gone_in="23.1",
+                    )
+                wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+            # Only when installing is it permitted to use PEP 660.
+            # In other circumstances (pip wheel, pip download) we generate
+            # regular (i.e. non editable) metadata and wheels.
+            for req in reqs:
+                req.permit_editable_wheels = True
+
+            reject_location_related_install_options(reqs, options.install_options)
+
+            preparer = self.make_requirement_preparer(
+                temp_build_dir=directory,
+                options=options,
+                build_tracker=build_tracker,
+                session=session,
+                finder=finder,
+                use_user_site=options.use_user_site,
+                verbosity=self.verbosity,
+            )
+            resolver = self.make_resolver(
+                preparer=preparer,
+                finder=finder,
+                options=options,
+                wheel_cache=wheel_cache,
+                use_user_site=options.use_user_site,
+                ignore_installed=options.ignore_installed,
+                ignore_requires_python=options.ignore_requires_python,
+                force_reinstall=options.force_reinstall,
+                upgrade_strategy=upgrade_strategy,
+                use_pep517=options.use_pep517,
+            )
+
+            self.trace_basic_info(finder)
+
+            requirement_set = resolver.resolve(
+                reqs, check_supported_wheels=not options.target_dir
+            )
+
+            if options.json_report_file:
+                logger.warning(
+                    "--report is currently an experimental option. "
+                    "The output format may change in a future release "
+                    "without prior warning."
+                )
+
+                report = InstallationReport(requirement_set.requirements_to_install)
+                if options.json_report_file == "-":
+                    print_json(data=report.to_dict())
+                else:
+                    with open(options.json_report_file, "w", encoding="utf-8") as f:
+                        json.dump(report.to_dict(), f, indent=2, ensure_ascii=False)
+
+            if options.dry_run:
+                would_install_items = sorted(
+                    (r.metadata["name"], r.metadata["version"])
+                    for r in requirement_set.requirements_to_install
+                )
+                if would_install_items:
+                    write_output(
+                        "Would install %s",
+                        " ".join("-".join(item) for item in would_install_items),
+                    )
+                return SUCCESS
+
+            try:
+                pip_req = requirement_set.get_requirement("pip")
+            except KeyError:
+                modifying_pip = False
+            else:
+                # If we're not replacing an already installed pip,
+                # we're not modifying it.
+                modifying_pip = pip_req.satisfied_by is None
+            protect_pip_from_modification_on_windows(modifying_pip=modifying_pip)
+
+            check_bdist_wheel_allowed = get_check_bdist_wheel_allowed(
+                finder.format_control
+            )
+
+            reqs_to_build = [
+                r
+                for r in requirement_set.requirements.values()
+                if should_build_for_install_command(r, check_bdist_wheel_allowed)
+            ]
+
+            _, build_failures = build(
+                reqs_to_build,
+                wheel_cache=wheel_cache,
+                verify=True,
+                build_options=[],
+                global_options=global_options,
+            )
+
+            # If we're using PEP 517, we cannot do a legacy setup.py install
+            # so we fail here.
+            pep517_build_failure_names: List[str] = [
+                r.name for r in build_failures if r.use_pep517  # type: ignore
+            ]
+            if pep517_build_failure_names:
+                raise InstallationError(
+                    "Could not build wheels for {}, which is required to "
+                    "install pyproject.toml-based projects".format(
+                        ", ".join(pep517_build_failure_names)
+                    )
+                )
+
+            # For now, we just warn about failures building legacy
+            # requirements, as we'll fall through to a setup.py install for
+            # those.
+            for r in build_failures:
+                if not r.use_pep517:
+                    r.legacy_install_reason = LegacyInstallReasonFailedBdistWheel
+
+            to_install = resolver.get_installation_order(requirement_set)
+
+            # Check for conflicts in the package set we're installing.
+            conflicts: Optional[ConflictDetails] = None
+            should_warn_about_conflicts = (
+                not options.ignore_dependencies and options.warn_about_conflicts
+            )
+            if should_warn_about_conflicts:
+                conflicts = self._determine_conflicts(to_install)
+
+            # Don't warn about script install locations if
+            # --target or --prefix has been specified
+            warn_script_location = options.warn_script_location
+            if options.target_dir or options.prefix_path:
+                warn_script_location = False
+
+            installed = install_given_reqs(
+                to_install,
+                install_options,
+                global_options,
+                root=options.root_path,
+                home=target_temp_dir_path,
+                prefix=options.prefix_path,
+                warn_script_location=warn_script_location,
+                use_user_site=options.use_user_site,
+                pycompile=options.compile,
+            )
+
+            lib_locations = get_lib_location_guesses(
+                user=options.use_user_site,
+                home=target_temp_dir_path,
+                root=options.root_path,
+                prefix=options.prefix_path,
+                isolated=options.isolated_mode,
+            )
+            env = get_environment(lib_locations)
+
+            installed.sort(key=operator.attrgetter("name"))
+            items = []
+            for result in installed:
+                item = result.name
+                try:
+                    installed_dist = env.get_distribution(item)
+                    if installed_dist is not None:
+                        item = f"{item}-{installed_dist.version}"
+                except Exception:
+                    pass
+                items.append(item)
+
+            if conflicts is not None:
+                self._warn_about_conflicts(
+                    conflicts,
+                    resolver_variant=self.determine_resolver_variant(options),
+                )
+
+            installed_desc = " ".join(items)
+            if installed_desc:
+                write_output(
+                    "Successfully installed %s",
+                    installed_desc,
+                )
+        except OSError as error:
+            show_traceback = self.verbosity >= 1
+
+            message = create_os_error_message(
+                error,
+                show_traceback,
+                options.use_user_site,
+            )
+            logger.error(message, exc_info=show_traceback)  # noqa
+
+            return ERROR
+
+        if options.target_dir:
+            assert target_temp_dir
+            self._handle_target_dir(
+                options.target_dir, target_temp_dir, options.upgrade
+            )
+        if options.root_user_action == "warn":
+            warn_if_run_as_root()
+        return SUCCESS
+
+    def _handle_target_dir(
+        self, target_dir: str, target_temp_dir: TempDirectory, upgrade: bool
+    ) -> None:
+        ensure_dir(target_dir)
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        lib_dir_list = []
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        scheme = get_scheme("", home=target_temp_dir.path)
+        purelib_dir = scheme.purelib
+        platlib_dir = scheme.platlib
+        data_dir = scheme.data
+
+        if os.path.exists(purelib_dir):
+            lib_dir_list.append(purelib_dir)
+        if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
+            lib_dir_list.append(platlib_dir)
+        if os.path.exists(data_dir):
+            lib_dir_list.append(data_dir)
+
+        for lib_dir in lib_dir_list:
+            for item in os.listdir(lib_dir):
+                if lib_dir == data_dir:
+                    ddir = os.path.join(data_dir, item)
+                    if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
+                        continue
+                target_item_dir = os.path.join(target_dir, item)
+                if os.path.exists(target_item_dir):
+                    if not upgrade:
+                        logger.warning(
+                            "Target directory %s already exists. Specify "
+                            "--upgrade to force replacement.",
+                            target_item_dir,
+                        )
+                        continue
+                    if os.path.islink(target_item_dir):
+                        logger.warning(
+                            "Target directory %s already exists and is "
+                            "a link. pip will not automatically replace "
+                            "links, please remove if replacement is "
+                            "desired.",
+                            target_item_dir,
+                        )
+                        continue
+                    if os.path.isdir(target_item_dir):
+                        shutil.rmtree(target_item_dir)
+                    else:
+                        os.remove(target_item_dir)
+
+                shutil.move(os.path.join(lib_dir, item), target_item_dir)
+
+    def _determine_conflicts(
+        self, to_install: List[InstallRequirement]
+    ) -> Optional[ConflictDetails]:
+        try:
+            return check_install_conflicts(to_install)
+        except Exception:
+            logger.exception(
+                "Error while checking for conflicts. Please file an issue on "
+                "pip's issue tracker: https://github.com/pypa/pip/issues/new"
+            )
+            return None
+
+    def _warn_about_conflicts(
+        self, conflict_details: ConflictDetails, resolver_variant: str
+    ) -> None:
+        package_set, (missing, conflicting) = conflict_details
+        if not missing and not conflicting:
+            return
+
+        parts: List[str] = []
+        if resolver_variant == "legacy":
+            parts.append(
+                "pip's legacy dependency resolver does not consider dependency "
+                "conflicts when selecting packages. This behaviour is the "
+                "source of the following dependency conflicts."
+            )
+        else:
+            assert resolver_variant == "2020-resolver"
+            parts.append(
+                "pip's dependency resolver does not currently take into account "
+                "all the packages that are installed. This behaviour is the "
+                "source of the following dependency conflicts."
+            )
+
+        # NOTE: There is some duplication here, with commands/check.py
+        for project_name in missing:
+            version = package_set[project_name][0]
+            for dependency in missing[project_name]:
+                message = (
+                    "{name} {version} requires {requirement}, "
+                    "which is not installed."
+                ).format(
+                    name=project_name,
+                    version=version,
+                    requirement=dependency[1],
+                )
+                parts.append(message)
+
+        for project_name in conflicting:
+            version = package_set[project_name][0]
+            for dep_name, dep_version, req in conflicting[project_name]:
+                message = (
+                    "{name} {version} requires {requirement}, but {you} have "
+                    "{dep_name} {dep_version} which is incompatible."
+                ).format(
+                    name=project_name,
+                    version=version,
+                    requirement=req,
+                    dep_name=dep_name,
+                    dep_version=dep_version,
+                    you=("you" if resolver_variant == "2020-resolver" else "you'll"),
+                )
+                parts.append(message)
+
+        logger.critical("\n".join(parts))
+
+
+def get_lib_location_guesses(
+    user: bool = False,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
+    isolated: bool = False,
+    prefix: Optional[str] = None,
+) -> List[str]:
+    scheme = get_scheme(
+        "",
+        user=user,
+        home=home,
+        root=root,
+        isolated=isolated,
+        prefix=prefix,
+    )
+    return [scheme.purelib, scheme.platlib]
+
+
+def site_packages_writable(root: Optional[str], isolated: bool) -> bool:
+    return all(
+        test_writable_dir(d)
+        for d in set(get_lib_location_guesses(root=root, isolated=isolated))
+    )
+
+
+def decide_user_install(
+    use_user_site: Optional[bool],
+    prefix_path: Optional[str] = None,
+    target_dir: Optional[str] = None,
+    root_path: Optional[str] = None,
+    isolated_mode: bool = False,
+) -> bool:
+    """Determine whether to do a user install based on the input options.
+
+    If use_user_site is False, no additional checks are done.
+    If use_user_site is True, it is checked for compatibility with other
+    options.
+    If use_user_site is None, the default behaviour depends on the environment,
+    which is provided by the other arguments.
+    """
+    # In some cases (config from tox), use_user_site can be set to an integer
+    # rather than a bool, which 'use_user_site is False' wouldn't catch.
+    if (use_user_site is not None) and (not use_user_site):
+        logger.debug("Non-user install by explicit request")
+        return False
+
+    if use_user_site:
+        if prefix_path:
+            raise CommandError(
+                "Can not combine '--user' and '--prefix' as they imply "
+                "different installation locations"
+            )
+        if virtualenv_no_global():
+            raise InstallationError(
+                "Can not perform a '--user' install. User site-packages "
+                "are not visible in this virtualenv."
+            )
+        logger.debug("User install by explicit request")
+        return True
+
+    # If we are here, user installs have not been explicitly requested/avoided
+    assert use_user_site is None
+
+    # user install incompatible with --prefix/--target
+    if prefix_path or target_dir:
+        logger.debug("Non-user install due to --prefix or --target option")
+        return False
+
+    # If user installs are not enabled, choose a non-user install
+    if not site.ENABLE_USER_SITE:
+        logger.debug("Non-user install because user site-packages disabled")
+        return False
+
+    # If we have permission for a non-user install, do that,
+    # otherwise do a user install.
+    if site_packages_writable(root=root_path, isolated=isolated_mode):
+        logger.debug("Non-user install because site-packages writeable")
+        return False
+
+    logger.info(
+        "Defaulting to user installation because normal site-packages "
+        "is not writeable"
+    )
+    return True
+
+
+def reject_location_related_install_options(
+    requirements: List[InstallRequirement], options: Optional[List[str]]
+) -> None:
+    """If any location-changing --install-option arguments were passed for
+    requirements or on the command-line, then show a deprecation warning.
+    """
+
+    def format_options(option_names: Iterable[str]) -> List[str]:
+        return ["--{}".format(name.replace("_", "-")) for name in option_names]
+
+    offenders = []
+
+    for requirement in requirements:
+        install_options = requirement.install_options
+        location_options = parse_distutils_args(install_options)
+        if location_options:
+            offenders.append(
+                "{!r} from {}".format(
+                    format_options(location_options.keys()), requirement
+                )
+            )
+
+    if options:
+        location_options = parse_distutils_args(options)
+        if location_options:
+            offenders.append(
+                "{!r} from command line".format(format_options(location_options.keys()))
+            )
+
+    if not offenders:
+        return
+
+    raise CommandError(
+        "Location-changing options found in --install-option: {}."
+        " This is unsupported, use pip-level options like --user,"
+        " --prefix, --root, and --target instead.".format("; ".join(offenders))
+    )
+
+
+def create_os_error_message(
+    error: OSError, show_traceback: bool, using_user_site: bool
+) -> str:
+    """Format an error message for an OSError
+
+    It may occur anytime during the execution of the install command.
+    """
+    parts = []
+
+    # Mention the error if we are not going to show a traceback
+    parts.append("Could not install packages due to an OSError")
+    if not show_traceback:
+        parts.append(": ")
+        parts.append(str(error))
+    else:
+        parts.append(".")
+
+    # Spilt the error indication from a helper message (if any)
+    parts[-1] += "\n"
+
+    # Suggest useful actions to the user:
+    #  (1) using user site-packages or (2) verifying the permissions
+    if error.errno == errno.EACCES:
+        user_option_part = "Consider using the `--user` option"
+        permissions_part = "Check the permissions"
+
+        if not running_under_virtualenv() and not using_user_site:
+            parts.extend(
+                [
+                    user_option_part,
+                    " or ",
+                    permissions_part.lower(),
+                ]
+            )
+        else:
+            parts.append(permissions_part)
+        parts.append(".\n")
+
+    # Suggest the user to enable Long Paths if path length is
+    # more than 260
+    if (
+        WINDOWS
+        and error.errno == errno.ENOENT
+        and error.filename
+        and len(error.filename) > 260
+    ):
+        parts.append(
+            "HINT: This error might have occurred since "
+            "this system does not have Windows Long Path "
+            "support enabled. You can find information on "
+            "how to enable this at "
+            "https://pip.pypa.io/warnings/enable-long-paths\n"
+        )
+
+    return "".join(parts).strip() + "\n"
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/list.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/list.py
new file mode 100644
index 0000000..8e1426d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/list.py
@@ -0,0 +1,365 @@
+import json
+import logging
+from optparse import Values
+from typing import TYPE_CHECKING, Generator, List, Optional, Sequence, Tuple, cast
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import IndexGroupCommand
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution, get_environment
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.network.session import PipSession
+from pip._internal.utils.compat import stdlib_pkgs
+from pip._internal.utils.misc import tabulate, write_output
+
+if TYPE_CHECKING:
+    from pip._internal.metadata.base import DistributionVersion
+
+    class _DistWithLatestInfo(BaseDistribution):
+        """Give the distribution object a couple of extra fields.
+
+        These will be populated during ``get_outdated()``. This is dirty but
+        makes the rest of the code much cleaner.
+        """
+
+        latest_version: DistributionVersion
+        latest_filetype: str
+
+    _ProcessedDists = Sequence[_DistWithLatestInfo]
+
+
+logger = logging.getLogger(__name__)
+
+
+class ListCommand(IndexGroupCommand):
+    """
+    List installed packages, including editables.
+
+    Packages are listed in a case-insensitive sorted order.
+    """
+
+    ignore_require_venv = True
+    usage = """
+      %prog [options]"""
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-o",
+            "--outdated",
+            action="store_true",
+            default=False,
+            help="List outdated packages",
+        )
+        self.cmd_opts.add_option(
+            "-u",
+            "--uptodate",
+            action="store_true",
+            default=False,
+            help="List uptodate packages",
+        )
+        self.cmd_opts.add_option(
+            "-e",
+            "--editable",
+            action="store_true",
+            default=False,
+            help="List editable projects.",
+        )
+        self.cmd_opts.add_option(
+            "-l",
+            "--local",
+            action="store_true",
+            default=False,
+            help=(
+                "If in a virtualenv that has global access, do not list "
+                "globally-installed packages."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "--user",
+            dest="user",
+            action="store_true",
+            default=False,
+            help="Only output packages installed in user-site.",
+        )
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            "--pre",
+            action="store_true",
+            default=False,
+            help=(
+                "Include pre-release and development versions. By default, "
+                "pip only finds stable versions."
+            ),
+        )
+
+        self.cmd_opts.add_option(
+            "--format",
+            action="store",
+            dest="list_format",
+            default="columns",
+            choices=("columns", "freeze", "json"),
+            help="Select the output format among: columns (default), freeze, or json",
+        )
+
+        self.cmd_opts.add_option(
+            "--not-required",
+            action="store_true",
+            dest="not_required",
+            help="List packages that are not dependencies of installed packages.",
+        )
+
+        self.cmd_opts.add_option(
+            "--exclude-editable",
+            action="store_false",
+            dest="include_editable",
+            help="Exclude editable package from output.",
+        )
+        self.cmd_opts.add_option(
+            "--include-editable",
+            action="store_true",
+            dest="include_editable",
+            help="Include editable package from output.",
+            default=True,
+        )
+        self.cmd_opts.add_option(cmdoptions.list_exclude())
+        index_opts = cmdoptions.make_option_group(cmdoptions.index_group, self.parser)
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def _build_package_finder(
+        self, options: Values, session: PipSession
+    ) -> PackageFinder:
+        """
+        Create a package finder appropriate to this list command.
+        """
+        link_collector = LinkCollector.create(session, options=options)
+
+        # Pass allow_yanked=False to ignore yanked versions.
+        selection_prefs = SelectionPreferences(
+            allow_yanked=False,
+            allow_all_prereleases=options.pre,
+        )
+
+        return PackageFinder.create(
+            link_collector=link_collector,
+            selection_prefs=selection_prefs,
+        )
+
+    def run(self, options: Values, args: List[str]) -> int:
+        if options.outdated and options.uptodate:
+            raise CommandError("Options --outdated and --uptodate cannot be combined.")
+
+        if options.outdated and options.list_format == "freeze":
+            raise CommandError(
+                "List format 'freeze' can not be used with the --outdated option."
+            )
+
+        cmdoptions.check_list_path_option(options)
+
+        skip = set(stdlib_pkgs)
+        if options.excludes:
+            skip.update(canonicalize_name(n) for n in options.excludes)
+
+        packages: "_ProcessedDists" = [
+            cast("_DistWithLatestInfo", d)
+            for d in get_environment(options.path).iter_installed_distributions(
+                local_only=options.local,
+                user_only=options.user,
+                editables_only=options.editable,
+                include_editables=options.include_editable,
+                skip=skip,
+            )
+        ]
+
+        # get_not_required must be called firstly in order to find and
+        # filter out all dependencies correctly. Otherwise a package
+        # can't be identified as requirement because some parent packages
+        # could be filtered out before.
+        if options.not_required:
+            packages = self.get_not_required(packages, options)
+
+        if options.outdated:
+            packages = self.get_outdated(packages, options)
+        elif options.uptodate:
+            packages = self.get_uptodate(packages, options)
+
+        self.output_package_listing(packages, options)
+        return SUCCESS
+
+    def get_outdated(
+        self, packages: "_ProcessedDists", options: Values
+    ) -> "_ProcessedDists":
+        return [
+            dist
+            for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version > dist.version
+        ]
+
+    def get_uptodate(
+        self, packages: "_ProcessedDists", options: Values
+    ) -> "_ProcessedDists":
+        return [
+            dist
+            for dist in self.iter_packages_latest_infos(packages, options)
+            if dist.latest_version == dist.version
+        ]
+
+    def get_not_required(
+        self, packages: "_ProcessedDists", options: Values
+    ) -> "_ProcessedDists":
+        dep_keys = {
+            canonicalize_name(dep.name)
+            for dist in packages
+            for dep in (dist.iter_dependencies() or ())
+        }
+
+        # Create a set to remove duplicate packages, and cast it to a list
+        # to keep the return type consistent with get_outdated and
+        # get_uptodate
+        return list({pkg for pkg in packages if pkg.canonical_name not in dep_keys})
+
+    def iter_packages_latest_infos(
+        self, packages: "_ProcessedDists", options: Values
+    ) -> Generator["_DistWithLatestInfo", None, None]:
+        with self._build_session(options) as session:
+            finder = self._build_package_finder(options, session)
+
+            def latest_info(
+                dist: "_DistWithLatestInfo",
+            ) -> Optional["_DistWithLatestInfo"]:
+                all_candidates = finder.find_all_candidates(dist.canonical_name)
+                if not options.pre:
+                    # Remove prereleases
+                    all_candidates = [
+                        candidate
+                        for candidate in all_candidates
+                        if not candidate.version.is_prerelease
+                    ]
+
+                evaluator = finder.make_candidate_evaluator(
+                    project_name=dist.canonical_name,
+                )
+                best_candidate = evaluator.sort_best_candidate(all_candidates)
+                if best_candidate is None:
+                    return None
+
+                remote_version = best_candidate.version
+                if best_candidate.link.is_wheel:
+                    typ = "wheel"
+                else:
+                    typ = "sdist"
+                dist.latest_version = remote_version
+                dist.latest_filetype = typ
+                return dist
+
+            for dist in map(latest_info, packages):
+                if dist is not None:
+                    yield dist
+
+    def output_package_listing(
+        self, packages: "_ProcessedDists", options: Values
+    ) -> None:
+        packages = sorted(
+            packages,
+            key=lambda dist: dist.canonical_name,
+        )
+        if options.list_format == "columns" and packages:
+            data, header = format_for_columns(packages, options)
+            self.output_package_listing_columns(data, header)
+        elif options.list_format == "freeze":
+            for dist in packages:
+                if options.verbose >= 1:
+                    write_output(
+                        "%s==%s (%s)", dist.raw_name, dist.version, dist.location
+                    )
+                else:
+                    write_output("%s==%s", dist.raw_name, dist.version)
+        elif options.list_format == "json":
+            write_output(format_for_json(packages, options))
+
+    def output_package_listing_columns(
+        self, data: List[List[str]], header: List[str]
+    ) -> None:
+        # insert the header first: we need to know the size of column names
+        if len(data) > 0:
+            data.insert(0, header)
+
+        pkg_strings, sizes = tabulate(data)
+
+        # Create and add a separator.
+        if len(data) > 0:
+            pkg_strings.insert(1, " ".join(map(lambda x: "-" * x, sizes)))
+
+        for val in pkg_strings:
+            write_output(val)
+
+
+def format_for_columns(
+    pkgs: "_ProcessedDists", options: Values
+) -> Tuple[List[List[str]], List[str]]:
+    """
+    Convert the package data into something usable
+    by output_package_listing_columns.
+    """
+    header = ["Package", "Version"]
+
+    running_outdated = options.outdated
+    if running_outdated:
+        header.extend(["Latest", "Type"])
+
+    has_editables = any(x.editable for x in pkgs)
+    if has_editables:
+        header.append("Editable project location")
+
+    if options.verbose >= 1:
+        header.append("Location")
+    if options.verbose >= 1:
+        header.append("Installer")
+
+    data = []
+    for proj in pkgs:
+        # if we're working on the 'outdated' list, separate out the
+        # latest_version and type
+        row = [proj.raw_name, str(proj.version)]
+
+        if running_outdated:
+            row.append(str(proj.latest_version))
+            row.append(proj.latest_filetype)
+
+        if has_editables:
+            row.append(proj.editable_project_location or "")
+
+        if options.verbose >= 1:
+            row.append(proj.location or "")
+        if options.verbose >= 1:
+            row.append(proj.installer)
+
+        data.append(row)
+
+    return data, header
+
+
+def format_for_json(packages: "_ProcessedDists", options: Values) -> str:
+    data = []
+    for dist in packages:
+        info = {
+            "name": dist.raw_name,
+            "version": str(dist.version),
+        }
+        if options.verbose >= 1:
+            info["location"] = dist.location or ""
+            info["installer"] = dist.installer
+        if options.outdated:
+            info["latest_version"] = str(dist.latest_version)
+            info["latest_filetype"] = dist.latest_filetype
+        editable_project_location = dist.editable_project_location
+        if editable_project_location:
+            info["editable_project_location"] = editable_project_location
+        data.append(info)
+    return json.dumps(data)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/search.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/search.py
new file mode 100644
index 0000000..03ed925
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/search.py
@@ -0,0 +1,174 @@
+import logging
+import shutil
+import sys
+import textwrap
+import xmlrpc.client
+from collections import OrderedDict
+from optparse import Values
+from typing import TYPE_CHECKING, Dict, List, Optional
+
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.req_command import SessionCommandMixin
+from pip._internal.cli.status_codes import NO_MATCHES_FOUND, SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.metadata import get_default_environment
+from pip._internal.models.index import PyPI
+from pip._internal.network.xmlrpc import PipXmlrpcTransport
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import write_output
+
+if TYPE_CHECKING:
+    from typing import TypedDict
+
+    class TransformedHit(TypedDict):
+        name: str
+        summary: str
+        versions: List[str]
+
+
+logger = logging.getLogger(__name__)
+
+
+class SearchCommand(Command, SessionCommandMixin):
+    """Search for PyPI packages whose name or summary contains <query>."""
+
+    usage = """
+      %prog [options] <query>"""
+    ignore_require_venv = True
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-i",
+            "--index",
+            dest="index",
+            metavar="URL",
+            default=PyPI.pypi_url,
+            help="Base URL of Python Package Index (default %default)",
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        if not args:
+            raise CommandError("Missing required argument (search query).")
+        query = args
+        pypi_hits = self.search(query, options)
+        hits = transform_hits(pypi_hits)
+
+        terminal_width = None
+        if sys.stdout.isatty():
+            terminal_width = shutil.get_terminal_size()[0]
+
+        print_results(hits, terminal_width=terminal_width)
+        if pypi_hits:
+            return SUCCESS
+        return NO_MATCHES_FOUND
+
+    def search(self, query: List[str], options: Values) -> List[Dict[str, str]]:
+        index_url = options.index
+
+        session = self.get_default_session(options)
+
+        transport = PipXmlrpcTransport(index_url, session)
+        pypi = xmlrpc.client.ServerProxy(index_url, transport)
+        try:
+            hits = pypi.search({"name": query, "summary": query}, "or")
+        except xmlrpc.client.Fault as fault:
+            message = "XMLRPC request failed [code: {code}]\n{string}".format(
+                code=fault.faultCode,
+                string=fault.faultString,
+            )
+            raise CommandError(message)
+        assert isinstance(hits, list)
+        return hits
+
+
+def transform_hits(hits: List[Dict[str, str]]) -> List["TransformedHit"]:
+    """
+    The list from pypi is really a list of versions. We want a list of
+    packages with the list of versions stored inline. This converts the
+    list from pypi into one we can use.
+    """
+    packages: Dict[str, "TransformedHit"] = OrderedDict()
+    for hit in hits:
+        name = hit["name"]
+        summary = hit["summary"]
+        version = hit["version"]
+
+        if name not in packages.keys():
+            packages[name] = {
+                "name": name,
+                "summary": summary,
+                "versions": [version],
+            }
+        else:
+            packages[name]["versions"].append(version)
+
+            # if this is the highest version, replace summary and score
+            if version == highest_version(packages[name]["versions"]):
+                packages[name]["summary"] = summary
+
+    return list(packages.values())
+
+
+def print_dist_installation_info(name: str, latest: str) -> None:
+    env = get_default_environment()
+    dist = env.get_distribution(name)
+    if dist is not None:
+        with indent_log():
+            if dist.version == latest:
+                write_output("INSTALLED: %s (latest)", dist.version)
+            else:
+                write_output("INSTALLED: %s", dist.version)
+                if parse_version(latest).pre:
+                    write_output(
+                        "LATEST:    %s (pre-release; install"
+                        " with `pip install --pre`)",
+                        latest,
+                    )
+                else:
+                    write_output("LATEST:    %s", latest)
+
+
+def print_results(
+    hits: List["TransformedHit"],
+    name_column_width: Optional[int] = None,
+    terminal_width: Optional[int] = None,
+) -> None:
+    if not hits:
+        return
+    if name_column_width is None:
+        name_column_width = (
+            max(
+                [
+                    len(hit["name"]) + len(highest_version(hit.get("versions", ["-"])))
+                    for hit in hits
+                ]
+            )
+            + 4
+        )
+
+    for hit in hits:
+        name = hit["name"]
+        summary = hit["summary"] or ""
+        latest = highest_version(hit.get("versions", ["-"]))
+        if terminal_width is not None:
+            target_width = terminal_width - name_column_width - 5
+            if target_width > 10:
+                # wrap and indent summary to fit terminal
+                summary_lines = textwrap.wrap(summary, target_width)
+                summary = ("\n" + " " * (name_column_width + 3)).join(summary_lines)
+
+        name_latest = f"{name} ({latest})"
+        line = f"{name_latest:{name_column_width}} - {summary}"
+        try:
+            write_output(line)
+            print_dist_installation_info(name, latest)
+        except UnicodeEncodeError:
+            pass
+
+
+def highest_version(versions: List[str]) -> str:
+    return max(versions, key=parse_version)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/show.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/show.py
new file mode 100644
index 0000000..212167c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/show.py
@@ -0,0 +1,183 @@
+import logging
+from optparse import Values
+from typing import Generator, Iterable, Iterator, List, NamedTuple, Optional
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.metadata import BaseDistribution, get_default_environment
+from pip._internal.utils.misc import write_output
+
+logger = logging.getLogger(__name__)
+
+
+class ShowCommand(Command):
+    """
+    Show information about one or more installed packages.
+
+    The output is in RFC-compliant mail header format.
+    """
+
+    usage = """
+      %prog [options] <package> ..."""
+    ignore_require_venv = True
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-f",
+            "--files",
+            dest="files",
+            action="store_true",
+            default=False,
+            help="Show the full list of installed files for each package.",
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        if not args:
+            logger.warning("ERROR: Please provide a package name or names.")
+            return ERROR
+        query = args
+
+        results = search_packages_info(query)
+        if not print_results(
+            results, list_files=options.files, verbose=options.verbose
+        ):
+            return ERROR
+        return SUCCESS
+
+
+class _PackageInfo(NamedTuple):
+    name: str
+    version: str
+    location: str
+    requires: List[str]
+    required_by: List[str]
+    installer: str
+    metadata_version: str
+    classifiers: List[str]
+    summary: str
+    homepage: str
+    project_urls: List[str]
+    author: str
+    author_email: str
+    license: str
+    entry_points: List[str]
+    files: Optional[List[str]]
+
+
+def search_packages_info(query: List[str]) -> Generator[_PackageInfo, None, None]:
+    """
+    Gather details from installed distributions. Print distribution name,
+    version, location, and installed files. Installed files requires a
+    pip generated 'installed-files.txt' in the distributions '.egg-info'
+    directory.
+    """
+    env = get_default_environment()
+
+    installed = {dist.canonical_name: dist for dist in env.iter_all_distributions()}
+    query_names = [canonicalize_name(name) for name in query]
+    missing = sorted(
+        [name for name, pkg in zip(query, query_names) if pkg not in installed]
+    )
+    if missing:
+        logger.warning("Package(s) not found: %s", ", ".join(missing))
+
+    def _get_requiring_packages(current_dist: BaseDistribution) -> Iterator[str]:
+        return (
+            dist.metadata["Name"] or "UNKNOWN"
+            for dist in installed.values()
+            if current_dist.canonical_name
+            in {canonicalize_name(d.name) for d in dist.iter_dependencies()}
+        )
+
+    for query_name in query_names:
+        try:
+            dist = installed[query_name]
+        except KeyError:
+            continue
+
+        requires = sorted((req.name for req in dist.iter_dependencies()), key=str.lower)
+        required_by = sorted(_get_requiring_packages(dist), key=str.lower)
+
+        try:
+            entry_points_text = dist.read_text("entry_points.txt")
+            entry_points = entry_points_text.splitlines(keepends=False)
+        except FileNotFoundError:
+            entry_points = []
+
+        files_iter = dist.iter_declared_entries()
+        if files_iter is None:
+            files: Optional[List[str]] = None
+        else:
+            files = sorted(files_iter)
+
+        metadata = dist.metadata
+
+        yield _PackageInfo(
+            name=dist.raw_name,
+            version=str(dist.version),
+            location=dist.location or "",
+            requires=requires,
+            required_by=required_by,
+            installer=dist.installer,
+            metadata_version=dist.metadata_version or "",
+            classifiers=metadata.get_all("Classifier", []),
+            summary=metadata.get("Summary", ""),
+            homepage=metadata.get("Home-page", ""),
+            project_urls=metadata.get_all("Project-URL", []),
+            author=metadata.get("Author", ""),
+            author_email=metadata.get("Author-email", ""),
+            license=metadata.get("License", ""),
+            entry_points=entry_points,
+            files=files,
+        )
+
+
+def print_results(
+    distributions: Iterable[_PackageInfo],
+    list_files: bool,
+    verbose: bool,
+) -> bool:
+    """
+    Print the information from installed distributions found.
+    """
+    results_printed = False
+    for i, dist in enumerate(distributions):
+        results_printed = True
+        if i > 0:
+            write_output("---")
+
+        write_output("Name: %s", dist.name)
+        write_output("Version: %s", dist.version)
+        write_output("Summary: %s", dist.summary)
+        write_output("Home-page: %s", dist.homepage)
+        write_output("Author: %s", dist.author)
+        write_output("Author-email: %s", dist.author_email)
+        write_output("License: %s", dist.license)
+        write_output("Location: %s", dist.location)
+        write_output("Requires: %s", ", ".join(dist.requires))
+        write_output("Required-by: %s", ", ".join(dist.required_by))
+
+        if verbose:
+            write_output("Metadata-Version: %s", dist.metadata_version)
+            write_output("Installer: %s", dist.installer)
+            write_output("Classifiers:")
+            for classifier in dist.classifiers:
+                write_output("  %s", classifier)
+            write_output("Entry-points:")
+            for entry in dist.entry_points:
+                write_output("  %s", entry.strip())
+            write_output("Project-URLs:")
+            for project_url in dist.project_urls:
+                write_output("  %s", project_url)
+        if list_files:
+            write_output("Files:")
+            if dist.files is None:
+                write_output("Cannot locate RECORD or installed-files.txt")
+            else:
+                for line in dist.files:
+                    write_output("  %s", line.strip())
+    return results_printed
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/uninstall.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/uninstall.py
new file mode 100644
index 0000000..dea8077
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/uninstall.py
@@ -0,0 +1,106 @@
+import logging
+from optparse import Values
+from typing import List
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.req_command import SessionCommandMixin, warn_if_run_as_root
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import InstallationError
+from pip._internal.req import parse_requirements
+from pip._internal.req.constructors import (
+    install_req_from_line,
+    install_req_from_parsed_requirement,
+)
+from pip._internal.utils.misc import protect_pip_from_modification_on_windows
+
+logger = logging.getLogger(__name__)
+
+
+class UninstallCommand(Command, SessionCommandMixin):
+    """
+    Uninstall packages.
+
+    pip is able to uninstall most installed packages. Known exceptions are:
+
+    - Pure distutils packages installed with ``python setup.py install``, which
+      leave behind no metadata to determine what files were installed.
+    - Script wrappers installed by ``python setup.py develop``.
+    """
+
+    usage = """
+      %prog [options] <package> ...
+      %prog [options] -r <requirements file> ..."""
+
+    def add_options(self) -> None:
+        self.cmd_opts.add_option(
+            "-r",
+            "--requirement",
+            dest="requirements",
+            action="append",
+            default=[],
+            metavar="file",
+            help=(
+                "Uninstall all the packages listed in the given requirements "
+                "file.  This option can be used multiple times."
+            ),
+        )
+        self.cmd_opts.add_option(
+            "-y",
+            "--yes",
+            dest="yes",
+            action="store_true",
+            help="Don't ask for confirmation of uninstall deletions.",
+        )
+        self.cmd_opts.add_option(cmdoptions.root_user_action())
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options: Values, args: List[str]) -> int:
+        session = self.get_default_session(options)
+
+        reqs_to_uninstall = {}
+        for name in args:
+            req = install_req_from_line(
+                name,
+                isolated=options.isolated_mode,
+            )
+            if req.name:
+                reqs_to_uninstall[canonicalize_name(req.name)] = req
+            else:
+                logger.warning(
+                    "Invalid requirement: %r ignored -"
+                    " the uninstall command expects named"
+                    " requirements.",
+                    name,
+                )
+        for filename in options.requirements:
+            for parsed_req in parse_requirements(
+                filename, options=options, session=session
+            ):
+                req = install_req_from_parsed_requirement(
+                    parsed_req, isolated=options.isolated_mode
+                )
+                if req.name:
+                    reqs_to_uninstall[canonicalize_name(req.name)] = req
+        if not reqs_to_uninstall:
+            raise InstallationError(
+                f"You must give at least one requirement to {self.name} (see "
+                f'"pip help {self.name}")'
+            )
+
+        protect_pip_from_modification_on_windows(
+            modifying_pip="pip" in reqs_to_uninstall
+        )
+
+        for req in reqs_to_uninstall.values():
+            uninstall_pathset = req.uninstall(
+                auto_confirm=options.yes,
+                verbose=self.verbosity > 0,
+            )
+            if uninstall_pathset:
+                uninstall_pathset.commit()
+        if options.root_user_action == "warn":
+            warn_if_run_as_root()
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/commands/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/commands/wheel.py
new file mode 100644
index 0000000..1afbd56
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/commands/wheel.py
@@ -0,0 +1,203 @@
+import logging
+import os
+import shutil
+from optparse import Values
+from typing import List
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.req_command import RequirementCommand, with_cleanup
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+from pip._internal.operations.build.build_tracker import get_build_tracker
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    LegacySetupPyOptionsCheckMode,
+    check_legacy_setup_py_options,
+)
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.misc import ensure_dir, normalize_path
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.wheel_builder import build, should_build_for_wheel_command
+
+logger = logging.getLogger(__name__)
+
+
+class WheelCommand(RequirementCommand):
+    """
+    Build Wheel archives for your requirements and dependencies.
+
+    Wheel is a built-package format, and offers the advantage of not
+    recompiling your software during every install. For more details, see the
+    wheel docs: https://wheel.readthedocs.io/en/latest/
+
+    'pip wheel' uses the build system interface as described here:
+    https://pip.pypa.io/en/stable/reference/build-system/
+
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> ...
+      %prog [options] -r <requirements file> ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def add_options(self) -> None:
+
+        self.cmd_opts.add_option(
+            "-w",
+            "--wheel-dir",
+            dest="wheel_dir",
+            metavar="dir",
+            default=os.curdir,
+            help=(
+                "Build wheels into <dir>, where the default is the "
+                "current working directory."
+            ),
+        )
+        self.cmd_opts.add_option(cmdoptions.no_binary())
+        self.cmd_opts.add_option(cmdoptions.only_binary())
+        self.cmd_opts.add_option(cmdoptions.prefer_binary())
+        self.cmd_opts.add_option(cmdoptions.no_build_isolation())
+        self.cmd_opts.add_option(cmdoptions.use_pep517())
+        self.cmd_opts.add_option(cmdoptions.no_use_pep517())
+        self.cmd_opts.add_option(cmdoptions.check_build_deps())
+        self.cmd_opts.add_option(cmdoptions.constraints())
+        self.cmd_opts.add_option(cmdoptions.editable())
+        self.cmd_opts.add_option(cmdoptions.requirements())
+        self.cmd_opts.add_option(cmdoptions.src())
+        self.cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        self.cmd_opts.add_option(cmdoptions.no_deps())
+        self.cmd_opts.add_option(cmdoptions.progress_bar())
+
+        self.cmd_opts.add_option(
+            "--no-verify",
+            dest="no_verify",
+            action="store_true",
+            default=False,
+            help="Don't verify if built wheel is valid.",
+        )
+
+        self.cmd_opts.add_option(cmdoptions.config_settings())
+        self.cmd_opts.add_option(cmdoptions.build_options())
+        self.cmd_opts.add_option(cmdoptions.global_options())
+
+        self.cmd_opts.add_option(
+            "--pre",
+            action="store_true",
+            default=False,
+            help=(
+                "Include pre-release and development versions. By default, "
+                "pip only finds stable versions."
+            ),
+        )
+
+        self.cmd_opts.add_option(cmdoptions.require_hashes())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    @with_cleanup
+    def run(self, options: Values, args: List[str]) -> int:
+        session = self.get_default_session(options)
+
+        finder = self._build_package_finder(options, session)
+        wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+        options.wheel_dir = normalize_path(options.wheel_dir)
+        ensure_dir(options.wheel_dir)
+
+        build_tracker = self.enter_context(get_build_tracker())
+
+        directory = TempDirectory(
+            delete=not options.no_clean,
+            kind="wheel",
+            globally_managed=True,
+        )
+
+        reqs = self.get_requirements(args, options, finder, session)
+        check_legacy_setup_py_options(
+            options, reqs, LegacySetupPyOptionsCheckMode.WHEEL
+        )
+
+        if "no-binary-enable-wheel-cache" in options.features_enabled:
+            # TODO: remove format_control from WheelCache when the deprecation cycle
+            # is over
+            wheel_cache = WheelCache(options.cache_dir)
+        else:
+            if options.format_control.no_binary:
+                deprecated(
+                    reason=(
+                        "--no-binary currently disables reading from "
+                        "the cache of locally built wheels. In the future "
+                        "--no-binary will not influence the wheel cache."
+                    ),
+                    replacement="to use the --no-cache-dir option",
+                    feature_flag="no-binary-enable-wheel-cache",
+                    issue=11453,
+                    gone_in="23.1",
+                )
+            wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+        preparer = self.make_requirement_preparer(
+            temp_build_dir=directory,
+            options=options,
+            build_tracker=build_tracker,
+            session=session,
+            finder=finder,
+            download_dir=options.wheel_dir,
+            use_user_site=False,
+            verbosity=self.verbosity,
+        )
+
+        resolver = self.make_resolver(
+            preparer=preparer,
+            finder=finder,
+            options=options,
+            wheel_cache=wheel_cache,
+            ignore_requires_python=options.ignore_requires_python,
+            use_pep517=options.use_pep517,
+        )
+
+        self.trace_basic_info(finder)
+
+        requirement_set = resolver.resolve(reqs, check_supported_wheels=True)
+
+        reqs_to_build: List[InstallRequirement] = []
+        for req in requirement_set.requirements.values():
+            if req.is_wheel:
+                preparer.save_linked_requirement(req)
+            elif should_build_for_wheel_command(req):
+                reqs_to_build.append(req)
+
+        # build wheels
+        build_successes, build_failures = build(
+            reqs_to_build,
+            wheel_cache=wheel_cache,
+            verify=(not options.no_verify),
+            build_options=options.build_options or [],
+            global_options=options.global_options or [],
+        )
+        for req in build_successes:
+            assert req.link and req.link.is_wheel
+            assert req.local_file_path
+            # copy from cache to target directory
+            try:
+                shutil.copy(req.local_file_path, options.wheel_dir)
+            except OSError as e:
+                logger.warning(
+                    "Building wheel for %s failed: %s",
+                    req.name,
+                    e,
+                )
+                build_failures.append(req)
+        if len(build_failures) != 0:
+            raise CommandError("Failed to build one or more wheels")
+
+        return SUCCESS
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/configuration.py b/venv/lib/python3.9/site-packages/pip/_internal/configuration.py
new file mode 100644
index 0000000..8fd46c9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/configuration.py
@@ -0,0 +1,374 @@
+"""Configuration management setup
+
+Some terminology:
+- name
+  As written in config files.
+- value
+  Value associated with a name
+- key
+  Name combined with it's section (section.name)
+- variant
+  A single word describing where the configuration key-value pair came from
+"""
+
+import configparser
+import locale
+import os
+import sys
+from typing import Any, Dict, Iterable, List, NewType, Optional, Tuple
+
+from pip._internal.exceptions import (
+    ConfigurationError,
+    ConfigurationFileCouldNotBeLoaded,
+)
+from pip._internal.utils import appdirs
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.logging import getLogger
+from pip._internal.utils.misc import ensure_dir, enum
+
+RawConfigParser = configparser.RawConfigParser  # Shorthand
+Kind = NewType("Kind", str)
+
+CONFIG_BASENAME = "pip.ini" if WINDOWS else "pip.conf"
+ENV_NAMES_IGNORED = "version", "help"
+
+# The kinds of configurations there are.
+kinds = enum(
+    USER="user",  # User Specific
+    GLOBAL="global",  # System Wide
+    SITE="site",  # [Virtual] Environment Specific
+    ENV="env",  # from PIP_CONFIG_FILE
+    ENV_VAR="env-var",  # from Environment Variables
+)
+OVERRIDE_ORDER = kinds.GLOBAL, kinds.USER, kinds.SITE, kinds.ENV, kinds.ENV_VAR
+VALID_LOAD_ONLY = kinds.USER, kinds.GLOBAL, kinds.SITE
+
+logger = getLogger(__name__)
+
+
+# NOTE: Maybe use the optionx attribute to normalize keynames.
+def _normalize_name(name: str) -> str:
+    """Make a name consistent regardless of source (environment or file)"""
+    name = name.lower().replace("_", "-")
+    if name.startswith("--"):
+        name = name[2:]  # only prefer long opts
+    return name
+
+
+def _disassemble_key(name: str) -> List[str]:
+    if "." not in name:
+        error_message = (
+            "Key does not contain dot separated section and key. "
+            "Perhaps you wanted to use 'global.{}' instead?"
+        ).format(name)
+        raise ConfigurationError(error_message)
+    return name.split(".", 1)
+
+
+def get_configuration_files() -> Dict[Kind, List[str]]:
+    global_config_files = [
+        os.path.join(path, CONFIG_BASENAME) for path in appdirs.site_config_dirs("pip")
+    ]
+
+    site_config_file = os.path.join(sys.prefix, CONFIG_BASENAME)
+    legacy_config_file = os.path.join(
+        os.path.expanduser("~"),
+        "pip" if WINDOWS else ".pip",
+        CONFIG_BASENAME,
+    )
+    new_config_file = os.path.join(appdirs.user_config_dir("pip"), CONFIG_BASENAME)
+    return {
+        kinds.GLOBAL: global_config_files,
+        kinds.SITE: [site_config_file],
+        kinds.USER: [legacy_config_file, new_config_file],
+    }
+
+
+class Configuration:
+    """Handles management of configuration.
+
+    Provides an interface to accessing and managing configuration files.
+
+    This class converts provides an API that takes "section.key-name" style
+    keys and stores the value associated with it as "key-name" under the
+    section "section".
+
+    This allows for a clean interface wherein the both the section and the
+    key-name are preserved in an easy to manage form in the configuration files
+    and the data stored is also nice.
+    """
+
+    def __init__(self, isolated: bool, load_only: Optional[Kind] = None) -> None:
+        super().__init__()
+
+        if load_only is not None and load_only not in VALID_LOAD_ONLY:
+            raise ConfigurationError(
+                "Got invalid value for load_only - should be one of {}".format(
+                    ", ".join(map(repr, VALID_LOAD_ONLY))
+                )
+            )
+        self.isolated = isolated
+        self.load_only = load_only
+
+        # Because we keep track of where we got the data from
+        self._parsers: Dict[Kind, List[Tuple[str, RawConfigParser]]] = {
+            variant: [] for variant in OVERRIDE_ORDER
+        }
+        self._config: Dict[Kind, Dict[str, Any]] = {
+            variant: {} for variant in OVERRIDE_ORDER
+        }
+        self._modified_parsers: List[Tuple[str, RawConfigParser]] = []
+
+    def load(self) -> None:
+        """Loads configuration from configuration files and environment"""
+        self._load_config_files()
+        if not self.isolated:
+            self._load_environment_vars()
+
+    def get_file_to_edit(self) -> Optional[str]:
+        """Returns the file with highest priority in configuration"""
+        assert self.load_only is not None, "Need to be specified a file to be editing"
+
+        try:
+            return self._get_parser_to_modify()[0]
+        except IndexError:
+            return None
+
+    def items(self) -> Iterable[Tuple[str, Any]]:
+        """Returns key-value pairs like dict.items() representing the loaded
+        configuration
+        """
+        return self._dictionary.items()
+
+    def get_value(self, key: str) -> Any:
+        """Get a value from the configuration."""
+        orig_key = key
+        key = _normalize_name(key)
+        try:
+            return self._dictionary[key]
+        except KeyError:
+            # disassembling triggers a more useful error message than simply
+            # "No such key" in the case that the key isn't in the form command.option
+            _disassemble_key(key)
+            raise ConfigurationError(f"No such key - {orig_key}")
+
+    def set_value(self, key: str, value: Any) -> None:
+        """Modify a value in the configuration."""
+        key = _normalize_name(key)
+        self._ensure_have_load_only()
+
+        assert self.load_only
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+
+            # Modify the parser and the configuration
+            if not parser.has_section(section):
+                parser.add_section(section)
+            parser.set(section, name, value)
+
+        self._config[self.load_only][key] = value
+        self._mark_as_modified(fname, parser)
+
+    def unset_value(self, key: str) -> None:
+        """Unset a value in the configuration."""
+        orig_key = key
+        key = _normalize_name(key)
+        self._ensure_have_load_only()
+
+        assert self.load_only
+        if key not in self._config[self.load_only]:
+            raise ConfigurationError(f"No such key - {orig_key}")
+
+        fname, parser = self._get_parser_to_modify()
+
+        if parser is not None:
+            section, name = _disassemble_key(key)
+            if not (
+                parser.has_section(section) and parser.remove_option(section, name)
+            ):
+                # The option was not removed.
+                raise ConfigurationError(
+                    "Fatal Internal error [id=1]. Please report as a bug."
+                )
+
+            # The section may be empty after the option was removed.
+            if not parser.items(section):
+                parser.remove_section(section)
+            self._mark_as_modified(fname, parser)
+
+        del self._config[self.load_only][key]
+
+    def save(self) -> None:
+        """Save the current in-memory state."""
+        self._ensure_have_load_only()
+
+        for fname, parser in self._modified_parsers:
+            logger.info("Writing to %s", fname)
+
+            # Ensure directory exists.
+            ensure_dir(os.path.dirname(fname))
+
+            with open(fname, "w") as f:
+                parser.write(f)
+
+    #
+    # Private routines
+    #
+
+    def _ensure_have_load_only(self) -> None:
+        if self.load_only is None:
+            raise ConfigurationError("Needed a specific file to be modifying.")
+        logger.debug("Will be working with %s variant only", self.load_only)
+
+    @property
+    def _dictionary(self) -> Dict[str, Any]:
+        """A dictionary representing the loaded configuration."""
+        # NOTE: Dictionaries are not populated if not loaded. So, conditionals
+        #       are not needed here.
+        retval = {}
+
+        for variant in OVERRIDE_ORDER:
+            retval.update(self._config[variant])
+
+        return retval
+
+    def _load_config_files(self) -> None:
+        """Loads configuration from configuration files"""
+        config_files = dict(self.iter_config_files())
+        if config_files[kinds.ENV][0:1] == [os.devnull]:
+            logger.debug(
+                "Skipping loading configuration files due to "
+                "environment's PIP_CONFIG_FILE being os.devnull"
+            )
+            return
+
+        for variant, files in config_files.items():
+            for fname in files:
+                # If there's specific variant set in `load_only`, load only
+                # that variant, not the others.
+                if self.load_only is not None and variant != self.load_only:
+                    logger.debug("Skipping file '%s' (variant: %s)", fname, variant)
+                    continue
+
+                parser = self._load_file(variant, fname)
+
+                # Keeping track of the parsers used
+                self._parsers[variant].append((fname, parser))
+
+    def _load_file(self, variant: Kind, fname: str) -> RawConfigParser:
+        logger.verbose("For variant '%s', will try loading '%s'", variant, fname)
+        parser = self._construct_parser(fname)
+
+        for section in parser.sections():
+            items = parser.items(section)
+            self._config[variant].update(self._normalized_keys(section, items))
+
+        return parser
+
+    def _construct_parser(self, fname: str) -> RawConfigParser:
+        parser = configparser.RawConfigParser()
+        # If there is no such file, don't bother reading it but create the
+        # parser anyway, to hold the data.
+        # Doing this is useful when modifying and saving files, where we don't
+        # need to construct a parser.
+        if os.path.exists(fname):
+            locale_encoding = locale.getpreferredencoding(False)
+            try:
+                parser.read(fname, encoding=locale_encoding)
+            except UnicodeDecodeError:
+                # See https://github.com/pypa/pip/issues/4963
+                raise ConfigurationFileCouldNotBeLoaded(
+                    reason=f"contains invalid {locale_encoding} characters",
+                    fname=fname,
+                )
+            except configparser.Error as error:
+                # See https://github.com/pypa/pip/issues/4893
+                raise ConfigurationFileCouldNotBeLoaded(error=error)
+        return parser
+
+    def _load_environment_vars(self) -> None:
+        """Loads configuration from environment variables"""
+        self._config[kinds.ENV_VAR].update(
+            self._normalized_keys(":env:", self.get_environ_vars())
+        )
+
+    def _normalized_keys(
+        self, section: str, items: Iterable[Tuple[str, Any]]
+    ) -> Dict[str, Any]:
+        """Normalizes items to construct a dictionary with normalized keys.
+
+        This routine is where the names become keys and are made the same
+        regardless of source - configuration files or environment.
+        """
+        normalized = {}
+        for name, val in items:
+            key = section + "." + _normalize_name(name)
+            normalized[key] = val
+        return normalized
+
+    def get_environ_vars(self) -> Iterable[Tuple[str, str]]:
+        """Returns a generator with all environmental vars with prefix PIP_"""
+        for key, val in os.environ.items():
+            if key.startswith("PIP_"):
+                name = key[4:].lower()
+                if name not in ENV_NAMES_IGNORED:
+                    yield name, val
+
+    # XXX: This is patched in the tests.
+    def iter_config_files(self) -> Iterable[Tuple[Kind, List[str]]]:
+        """Yields variant and configuration files associated with it.
+
+        This should be treated like items of a dictionary.
+        """
+        # SMELL: Move the conditions out of this function
+
+        # environment variables have the lowest priority
+        config_file = os.environ.get("PIP_CONFIG_FILE", None)
+        if config_file is not None:
+            yield kinds.ENV, [config_file]
+        else:
+            yield kinds.ENV, []
+
+        config_files = get_configuration_files()
+
+        # at the base we have any global configuration
+        yield kinds.GLOBAL, config_files[kinds.GLOBAL]
+
+        # per-user configuration next
+        should_load_user_config = not self.isolated and not (
+            config_file and os.path.exists(config_file)
+        )
+        if should_load_user_config:
+            # The legacy config file is overridden by the new config file
+            yield kinds.USER, config_files[kinds.USER]
+
+        # finally virtualenv configuration first trumping others
+        yield kinds.SITE, config_files[kinds.SITE]
+
+    def get_values_in_config(self, variant: Kind) -> Dict[str, Any]:
+        """Get values present in a config file"""
+        return self._config[variant]
+
+    def _get_parser_to_modify(self) -> Tuple[str, RawConfigParser]:
+        # Determine which parser to modify
+        assert self.load_only
+        parsers = self._parsers[self.load_only]
+        if not parsers:
+            # This should not happen if everything works correctly.
+            raise ConfigurationError(
+                "Fatal Internal error [id=2]. Please report as a bug."
+            )
+
+        # Use the highest priority parser.
+        return parsers[-1]
+
+    # XXX: This is patched in the tests.
+    def _mark_as_modified(self, fname: str, parser: RawConfigParser) -> None:
+        file_parser_tuple = (fname, parser)
+        if file_parser_tuple not in self._modified_parsers:
+            self._modified_parsers.append(file_parser_tuple)
+
+    def __repr__(self) -> str:
+        return f"{self.__class__.__name__}({self._dictionary!r})"
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__init__.py
new file mode 100644
index 0000000..9a89a83
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__init__.py
@@ -0,0 +1,21 @@
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.distributions.sdist import SourceDistribution
+from pip._internal.distributions.wheel import WheelDistribution
+from pip._internal.req.req_install import InstallRequirement
+
+
+def make_distribution_for_install_requirement(
+    install_req: InstallRequirement,
+) -> AbstractDistribution:
+    """Returns a Distribution for the given InstallRequirement"""
+    # Editable requirements will always be source distributions. They use the
+    # legacy logic until we create a modern standard for them.
+    if install_req.editable:
+        return SourceDistribution(install_req)
+
+    # If it's a wheel, it's a WheelDistribution
+    if install_req.is_wheel:
+        return WheelDistribution(install_req)
+
+    # Otherwise, a SourceDistribution
+    return SourceDistribution(install_req)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..1b9956d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/base.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/base.cpython-39.pyc
new file mode 100644
index 0000000..a5942cb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/base.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-39.pyc
new file mode 100644
index 0000000..fb42ecb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/installed.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/sdist.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/sdist.cpython-39.pyc
new file mode 100644
index 0000000..fc84d41
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/sdist.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-39.pyc
new file mode 100644
index 0000000..e69479c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/__pycache__/wheel.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/base.py b/venv/lib/python3.9/site-packages/pip/_internal/distributions/base.py
new file mode 100644
index 0000000..75ce2dc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/base.py
@@ -0,0 +1,39 @@
+import abc
+
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata.base import BaseDistribution
+from pip._internal.req import InstallRequirement
+
+
+class AbstractDistribution(metaclass=abc.ABCMeta):
+    """A base class for handling installable artifacts.
+
+    The requirements for anything installable are as follows:
+
+     - we must be able to determine the requirement name
+       (or we can't correctly handle the non-upgrade case).
+
+     - for packages with setup requirements, we must also be able
+       to determine their requirements without installing additional
+       packages (for the same reason as run-time dependencies)
+
+     - we must be able to create a Distribution object exposing the
+       above metadata.
+    """
+
+    def __init__(self, req: InstallRequirement) -> None:
+        super().__init__()
+        self.req = req
+
+    @abc.abstractmethod
+    def get_metadata_distribution(self) -> BaseDistribution:
+        raise NotImplementedError()
+
+    @abc.abstractmethod
+    def prepare_distribution_metadata(
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
+    ) -> None:
+        raise NotImplementedError()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/installed.py b/venv/lib/python3.9/site-packages/pip/_internal/distributions/installed.py
new file mode 100644
index 0000000..edb38aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/installed.py
@@ -0,0 +1,23 @@
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution
+
+
+class InstalledDistribution(AbstractDistribution):
+    """Represents an installed package.
+
+    This does not need any preparation as the required information has already
+    been computed.
+    """
+
+    def get_metadata_distribution(self) -> BaseDistribution:
+        assert self.req.satisfied_by is not None, "not actually installed"
+        return self.req.satisfied_by
+
+    def prepare_distribution_metadata(
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
+    ) -> None:
+        pass
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/sdist.py b/venv/lib/python3.9/site-packages/pip/_internal/distributions/sdist.py
new file mode 100644
index 0000000..4c25647
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/sdist.py
@@ -0,0 +1,150 @@
+import logging
+from typing import Iterable, Set, Tuple
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.exceptions import InstallationError
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution
+from pip._internal.utils.subprocess import runner_with_spinner_message
+
+logger = logging.getLogger(__name__)
+
+
+class SourceDistribution(AbstractDistribution):
+    """Represents a source distribution.
+
+    The preparation step for these needs metadata for the packages to be
+    generated, either using PEP 517 or using the legacy `setup.py egg_info`.
+    """
+
+    def get_metadata_distribution(self) -> BaseDistribution:
+        return self.req.get_dist()
+
+    def prepare_distribution_metadata(
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
+    ) -> None:
+        # Load pyproject.toml, to determine whether PEP 517 is to be used
+        self.req.load_pyproject_toml()
+
+        # Set up the build isolation, if this requirement should be isolated
+        should_isolate = self.req.use_pep517 and build_isolation
+        if should_isolate:
+            # Setup an isolated environment and install the build backend static
+            # requirements in it.
+            self._prepare_build_backend(finder)
+            # Check that if the requirement is editable, it either supports PEP 660 or
+            # has a setup.py or a setup.cfg. This cannot be done earlier because we need
+            # to setup the build backend to verify it supports build_editable, nor can
+            # it be done later, because we want to avoid installing build requirements
+            # needlessly. Doing it here also works around setuptools generating
+            # UNKNOWN.egg-info when running get_requires_for_build_wheel on a directory
+            # without setup.py nor setup.cfg.
+            self.req.isolated_editable_sanity_check()
+            # Install the dynamic build requirements.
+            self._install_build_reqs(finder)
+        # Check if the current environment provides build dependencies
+        should_check_deps = self.req.use_pep517 and check_build_deps
+        if should_check_deps:
+            pyproject_requires = self.req.pyproject_requires
+            assert pyproject_requires is not None
+            conflicting, missing = self.req.build_env.check_requirements(
+                pyproject_requires
+            )
+            if conflicting:
+                self._raise_conflicts("the backend dependencies", conflicting)
+            if missing:
+                self._raise_missing_reqs(missing)
+        self.req.prepare_metadata()
+
+    def _prepare_build_backend(self, finder: PackageFinder) -> None:
+        # Isolate in a BuildEnvironment and install the build-time
+        # requirements.
+        pyproject_requires = self.req.pyproject_requires
+        assert pyproject_requires is not None
+
+        self.req.build_env = BuildEnvironment()
+        self.req.build_env.install_requirements(
+            finder, pyproject_requires, "overlay", kind="build dependencies"
+        )
+        conflicting, missing = self.req.build_env.check_requirements(
+            self.req.requirements_to_check
+        )
+        if conflicting:
+            self._raise_conflicts("PEP 517/518 supported requirements", conflicting)
+        if missing:
+            logger.warning(
+                "Missing build requirements in pyproject.toml for %s.",
+                self.req,
+            )
+            logger.warning(
+                "The project does not specify a build backend, and "
+                "pip cannot fall back to setuptools without %s.",
+                " and ".join(map(repr, sorted(missing))),
+            )
+
+    def _get_build_requires_wheel(self) -> Iterable[str]:
+        with self.req.build_env:
+            runner = runner_with_spinner_message("Getting requirements to build wheel")
+            backend = self.req.pep517_backend
+            assert backend is not None
+            with backend.subprocess_runner(runner):
+                return backend.get_requires_for_build_wheel()
+
+    def _get_build_requires_editable(self) -> Iterable[str]:
+        with self.req.build_env:
+            runner = runner_with_spinner_message(
+                "Getting requirements to build editable"
+            )
+            backend = self.req.pep517_backend
+            assert backend is not None
+            with backend.subprocess_runner(runner):
+                return backend.get_requires_for_build_editable()
+
+    def _install_build_reqs(self, finder: PackageFinder) -> None:
+        # Install any extra build dependencies that the backend requests.
+        # This must be done in a second pass, as the pyproject.toml
+        # dependencies must be installed before we can call the backend.
+        if (
+            self.req.editable
+            and self.req.permit_editable_wheels
+            and self.req.supports_pyproject_editable()
+        ):
+            build_reqs = self._get_build_requires_editable()
+        else:
+            build_reqs = self._get_build_requires_wheel()
+        conflicting, missing = self.req.build_env.check_requirements(build_reqs)
+        if conflicting:
+            self._raise_conflicts("the backend dependencies", conflicting)
+        self.req.build_env.install_requirements(
+            finder, missing, "normal", kind="backend dependencies"
+        )
+
+    def _raise_conflicts(
+        self, conflicting_with: str, conflicting_reqs: Set[Tuple[str, str]]
+    ) -> None:
+        format_string = (
+            "Some build dependencies for {requirement} "
+            "conflict with {conflicting_with}: {description}."
+        )
+        error_message = format_string.format(
+            requirement=self.req,
+            conflicting_with=conflicting_with,
+            description=", ".join(
+                f"{installed} is incompatible with {wanted}"
+                for installed, wanted in sorted(conflicting_reqs)
+            ),
+        )
+        raise InstallationError(error_message)
+
+    def _raise_missing_reqs(self, missing: Set[str]) -> None:
+        format_string = (
+            "Some build dependencies for {requirement} are missing: {missing}."
+        )
+        error_message = format_string.format(
+            requirement=self.req, missing=", ".join(map(repr, sorted(missing)))
+        )
+        raise InstallationError(error_message)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/distributions/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/distributions/wheel.py
new file mode 100644
index 0000000..03aac77
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/distributions/wheel.py
@@ -0,0 +1,34 @@
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.distributions.base import AbstractDistribution
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import (
+    BaseDistribution,
+    FilesystemWheel,
+    get_wheel_distribution,
+)
+
+
+class WheelDistribution(AbstractDistribution):
+    """Represents a wheel distribution.
+
+    This does not need any preparation as wheels can be directly unpacked.
+    """
+
+    def get_metadata_distribution(self) -> BaseDistribution:
+        """Loads the metadata from the wheel file into memory and returns a
+        Distribution that uses it, not relying on the wheel file or
+        requirement.
+        """
+        assert self.req.local_file_path, "Set as part of preparation during download"
+        assert self.req.name, "Wheels are never unnamed"
+        wheel = FilesystemWheel(self.req.local_file_path)
+        return get_wheel_distribution(wheel, canonicalize_name(self.req.name))
+
+    def prepare_distribution_metadata(
+        self,
+        finder: PackageFinder,
+        build_isolation: bool,
+        check_build_deps: bool,
+    ) -> None:
+        pass
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/exceptions.py b/venv/lib/python3.9/site-packages/pip/_internal/exceptions.py
new file mode 100644
index 0000000..2ab1f59
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/exceptions.py
@@ -0,0 +1,660 @@
+"""Exceptions used throughout package.
+
+This module MUST NOT try to import from anything within `pip._internal` to
+operate. This is expected to be importable from any/all files within the
+subpackage and, thus, should not depend on them.
+"""
+
+import configparser
+import re
+from itertools import chain, groupby, repeat
+from typing import TYPE_CHECKING, Dict, List, Optional, Union
+
+from pip._vendor.requests.models import Request, Response
+from pip._vendor.rich.console import Console, ConsoleOptions, RenderResult
+from pip._vendor.rich.markup import escape
+from pip._vendor.rich.text import Text
+
+if TYPE_CHECKING:
+    from hashlib import _Hash
+    from typing import Literal
+
+    from pip._internal.metadata import BaseDistribution
+    from pip._internal.req.req_install import InstallRequirement
+
+
+#
+# Scaffolding
+#
+def _is_kebab_case(s: str) -> bool:
+    return re.match(r"^[a-z]+(-[a-z]+)*$", s) is not None
+
+
+def _prefix_with_indent(
+    s: Union[Text, str],
+    console: Console,
+    *,
+    prefix: str,
+    indent: str,
+) -> Text:
+    if isinstance(s, Text):
+        text = s
+    else:
+        text = console.render_str(s)
+
+    return console.render_str(prefix, overflow="ignore") + console.render_str(
+        f"\n{indent}", overflow="ignore"
+    ).join(text.split(allow_blank=True))
+
+
+class PipError(Exception):
+    """The base pip error."""
+
+
+class DiagnosticPipError(PipError):
+    """An error, that presents diagnostic information to the user.
+
+    This contains a bunch of logic, to enable pretty presentation of our error
+    messages. Each error gets a unique reference. Each error can also include
+    additional context, a hint and/or a note -- which are presented with the
+    main error message in a consistent style.
+
+    This is adapted from the error output styling in `sphinx-theme-builder`.
+    """
+
+    reference: str
+
+    def __init__(
+        self,
+        *,
+        kind: 'Literal["error", "warning"]' = "error",
+        reference: Optional[str] = None,
+        message: Union[str, Text],
+        context: Optional[Union[str, Text]],
+        hint_stmt: Optional[Union[str, Text]],
+        note_stmt: Optional[Union[str, Text]] = None,
+        link: Optional[str] = None,
+    ) -> None:
+        # Ensure a proper reference is provided.
+        if reference is None:
+            assert hasattr(self, "reference"), "error reference not provided!"
+            reference = self.reference
+        assert _is_kebab_case(reference), "error reference must be kebab-case!"
+
+        self.kind = kind
+        self.reference = reference
+
+        self.message = message
+        self.context = context
+
+        self.note_stmt = note_stmt
+        self.hint_stmt = hint_stmt
+
+        self.link = link
+
+        super().__init__(f"<{self.__class__.__name__}: {self.reference}>")
+
+    def __repr__(self) -> str:
+        return (
+            f"<{self.__class__.__name__}("
+            f"reference={self.reference!r}, "
+            f"message={self.message!r}, "
+            f"context={self.context!r}, "
+            f"note_stmt={self.note_stmt!r}, "
+            f"hint_stmt={self.hint_stmt!r}"
+            ")>"
+        )
+
+    def __rich_console__(
+        self,
+        console: Console,
+        options: ConsoleOptions,
+    ) -> RenderResult:
+        colour = "red" if self.kind == "error" else "yellow"
+
+        yield f"[{colour} bold]{self.kind}[/]: [bold]{self.reference}[/]"
+        yield ""
+
+        if not options.ascii_only:
+            # Present the main message, with relevant context indented.
+            if self.context is not None:
+                yield _prefix_with_indent(
+                    self.message,
+                    console,
+                    prefix=f"[{colour}]×[/] ",
+                    indent=f"[{colour}]│[/] ",
+                )
+                yield _prefix_with_indent(
+                    self.context,
+                    console,
+                    prefix=f"[{colour}]╰─>[/] ",
+                    indent=f"[{colour}]   [/] ",
+                )
+            else:
+                yield _prefix_with_indent(
+                    self.message,
+                    console,
+                    prefix="[red]×[/] ",
+                    indent="  ",
+                )
+        else:
+            yield self.message
+            if self.context is not None:
+                yield ""
+                yield self.context
+
+        if self.note_stmt is not None or self.hint_stmt is not None:
+            yield ""
+
+        if self.note_stmt is not None:
+            yield _prefix_with_indent(
+                self.note_stmt,
+                console,
+                prefix="[magenta bold]note[/]: ",
+                indent="      ",
+            )
+        if self.hint_stmt is not None:
+            yield _prefix_with_indent(
+                self.hint_stmt,
+                console,
+                prefix="[cyan bold]hint[/]: ",
+                indent="      ",
+            )
+
+        if self.link is not None:
+            yield ""
+            yield f"Link: {self.link}"
+
+
+#
+# Actual Errors
+#
+class ConfigurationError(PipError):
+    """General exception in configuration"""
+
+
+class InstallationError(PipError):
+    """General exception during installation"""
+
+
+class UninstallationError(PipError):
+    """General exception during uninstallation"""
+
+
+class MissingPyProjectBuildRequires(DiagnosticPipError):
+    """Raised when pyproject.toml has `build-system`, but no `build-system.requires`."""
+
+    reference = "missing-pyproject-build-system-requires"
+
+    def __init__(self, *, package: str) -> None:
+        super().__init__(
+            message=f"Can not process {escape(package)}",
+            context=Text(
+                "This package has an invalid pyproject.toml file.\n"
+                "The [build-system] table is missing the mandatory `requires` key."
+            ),
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+            hint_stmt=Text("See PEP 518 for the detailed specification."),
+        )
+
+
+class InvalidPyProjectBuildRequires(DiagnosticPipError):
+    """Raised when pyproject.toml an invalid `build-system.requires`."""
+
+    reference = "invalid-pyproject-build-system-requires"
+
+    def __init__(self, *, package: str, reason: str) -> None:
+        super().__init__(
+            message=f"Can not process {escape(package)}",
+            context=Text(
+                "This package has an invalid `build-system.requires` key in "
+                f"pyproject.toml.\n{reason}"
+            ),
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+            hint_stmt=Text("See PEP 518 for the detailed specification."),
+        )
+
+
+class NoneMetadataError(PipError):
+    """Raised when accessing a Distribution's "METADATA" or "PKG-INFO".
+
+    This signifies an inconsistency, when the Distribution claims to have
+    the metadata file (if not, raise ``FileNotFoundError`` instead), but is
+    not actually able to produce its content. This may be due to permission
+    errors.
+    """
+
+    def __init__(
+        self,
+        dist: "BaseDistribution",
+        metadata_name: str,
+    ) -> None:
+        """
+        :param dist: A Distribution object.
+        :param metadata_name: The name of the metadata being accessed
+            (can be "METADATA" or "PKG-INFO").
+        """
+        self.dist = dist
+        self.metadata_name = metadata_name
+
+    def __str__(self) -> str:
+        # Use `dist` in the error message because its stringification
+        # includes more information, like the version and location.
+        return "None {} metadata found for distribution: {}".format(
+            self.metadata_name,
+            self.dist,
+        )
+
+
+class UserInstallationInvalid(InstallationError):
+    """A --user install is requested on an environment without user site."""
+
+    def __str__(self) -> str:
+        return "User base directory is not specified"
+
+
+class InvalidSchemeCombination(InstallationError):
+    def __str__(self) -> str:
+        before = ", ".join(str(a) for a in self.args[:-1])
+        return f"Cannot set {before} and {self.args[-1]} together"
+
+
+class DistributionNotFound(InstallationError):
+    """Raised when a distribution cannot be found to satisfy a requirement"""
+
+
+class RequirementsFileParseError(InstallationError):
+    """Raised when a general error occurs parsing a requirements file line."""
+
+
+class BestVersionAlreadyInstalled(PipError):
+    """Raised when the most up-to-date version of a package is already
+    installed."""
+
+
+class BadCommand(PipError):
+    """Raised when virtualenv or a command is not found"""
+
+
+class CommandError(PipError):
+    """Raised when there is an error in command-line arguments"""
+
+
+class PreviousBuildDirError(PipError):
+    """Raised when there's a previous conflicting build directory"""
+
+
+class NetworkConnectionError(PipError):
+    """HTTP connection error"""
+
+    def __init__(
+        self,
+        error_msg: str,
+        response: Optional[Response] = None,
+        request: Optional[Request] = None,
+    ) -> None:
+        """
+        Initialize NetworkConnectionError with  `request` and `response`
+        objects.
+        """
+        self.response = response
+        self.request = request
+        self.error_msg = error_msg
+        if (
+            self.response is not None
+            and not self.request
+            and hasattr(response, "request")
+        ):
+            self.request = self.response.request
+        super().__init__(error_msg, response, request)
+
+    def __str__(self) -> str:
+        return str(self.error_msg)
+
+
+class InvalidWheelFilename(InstallationError):
+    """Invalid wheel filename."""
+
+
+class UnsupportedWheel(InstallationError):
+    """Unsupported wheel."""
+
+
+class InvalidWheel(InstallationError):
+    """Invalid (e.g. corrupt) wheel."""
+
+    def __init__(self, location: str, name: str):
+        self.location = location
+        self.name = name
+
+    def __str__(self) -> str:
+        return f"Wheel '{self.name}' located at {self.location} is invalid."
+
+
+class MetadataInconsistent(InstallationError):
+    """Built metadata contains inconsistent information.
+
+    This is raised when the metadata contains values (e.g. name and version)
+    that do not match the information previously obtained from sdist filename,
+    user-supplied ``#egg=`` value, or an install requirement name.
+    """
+
+    def __init__(
+        self, ireq: "InstallRequirement", field: str, f_val: str, m_val: str
+    ) -> None:
+        self.ireq = ireq
+        self.field = field
+        self.f_val = f_val
+        self.m_val = m_val
+
+    def __str__(self) -> str:
+        return (
+            f"Requested {self.ireq} has inconsistent {self.field}: "
+            f"expected {self.f_val!r}, but metadata has {self.m_val!r}"
+        )
+
+
+class LegacyInstallFailure(DiagnosticPipError):
+    """Error occurred while executing `setup.py install`"""
+
+    reference = "legacy-install-failure"
+
+    def __init__(self, package_details: str) -> None:
+        super().__init__(
+            message="Encountered error while trying to install package.",
+            context=package_details,
+            hint_stmt="See above for output from the failure.",
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+        )
+
+
+class InstallationSubprocessError(DiagnosticPipError, InstallationError):
+    """A subprocess call failed."""
+
+    reference = "subprocess-exited-with-error"
+
+    def __init__(
+        self,
+        *,
+        command_description: str,
+        exit_code: int,
+        output_lines: Optional[List[str]],
+    ) -> None:
+        if output_lines is None:
+            output_prompt = Text("See above for output.")
+        else:
+            output_prompt = (
+                Text.from_markup(f"[red][{len(output_lines)} lines of output][/]\n")
+                + Text("".join(output_lines))
+                + Text.from_markup(R"[red]\[end of output][/]")
+            )
+
+        super().__init__(
+            message=(
+                f"[green]{escape(command_description)}[/] did not run successfully.\n"
+                f"exit code: {exit_code}"
+            ),
+            context=output_prompt,
+            hint_stmt=None,
+            note_stmt=(
+                "This error originates from a subprocess, and is likely not a "
+                "problem with pip."
+            ),
+        )
+
+        self.command_description = command_description
+        self.exit_code = exit_code
+
+    def __str__(self) -> str:
+        return f"{self.command_description} exited with {self.exit_code}"
+
+
+class MetadataGenerationFailed(InstallationSubprocessError, InstallationError):
+    reference = "metadata-generation-failed"
+
+    def __init__(
+        self,
+        *,
+        package_details: str,
+    ) -> None:
+        super(InstallationSubprocessError, self).__init__(
+            message="Encountered error while generating package metadata.",
+            context=escape(package_details),
+            hint_stmt="See above for details.",
+            note_stmt="This is an issue with the package mentioned above, not pip.",
+        )
+
+    def __str__(self) -> str:
+        return "metadata generation failed"
+
+
+class HashErrors(InstallationError):
+    """Multiple HashError instances rolled into one for reporting"""
+
+    def __init__(self) -> None:
+        self.errors: List["HashError"] = []
+
+    def append(self, error: "HashError") -> None:
+        self.errors.append(error)
+
+    def __str__(self) -> str:
+        lines = []
+        self.errors.sort(key=lambda e: e.order)
+        for cls, errors_of_cls in groupby(self.errors, lambda e: e.__class__):
+            lines.append(cls.head)
+            lines.extend(e.body() for e in errors_of_cls)
+        if lines:
+            return "\n".join(lines)
+        return ""
+
+    def __bool__(self) -> bool:
+        return bool(self.errors)
+
+
+class HashError(InstallationError):
+    """
+    A failure to verify a package against known-good hashes
+
+    :cvar order: An int sorting hash exception classes by difficulty of
+        recovery (lower being harder), so the user doesn't bother fretting
+        about unpinned packages when he has deeper issues, like VCS
+        dependencies, to deal with. Also keeps error reports in a
+        deterministic order.
+    :cvar head: A section heading for display above potentially many
+        exceptions of this kind
+    :ivar req: The InstallRequirement that triggered this error. This is
+        pasted on after the exception is instantiated, because it's not
+        typically available earlier.
+
+    """
+
+    req: Optional["InstallRequirement"] = None
+    head = ""
+    order: int = -1
+
+    def body(self) -> str:
+        """Return a summary of me for display under the heading.
+
+        This default implementation simply prints a description of the
+        triggering requirement.
+
+        :param req: The InstallRequirement that provoked this error, with
+            its link already populated by the resolver's _populate_link().
+
+        """
+        return f"    {self._requirement_name()}"
+
+    def __str__(self) -> str:
+        return f"{self.head}\n{self.body()}"
+
+    def _requirement_name(self) -> str:
+        """Return a description of the requirement that triggered me.
+
+        This default implementation returns long description of the req, with
+        line numbers
+
+        """
+        return str(self.req) if self.req else "unknown package"
+
+
+class VcsHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 0
+    head = (
+        "Can't verify hashes for these requirements because we don't "
+        "have a way to hash version control repositories:"
+    )
+
+
+class DirectoryUrlHashUnsupported(HashError):
+    """A hash was provided for a version-control-system-based requirement, but
+    we don't have a method for hashing those."""
+
+    order = 1
+    head = (
+        "Can't verify hashes for these file:// requirements because they "
+        "point to directories:"
+    )
+
+
+class HashMissing(HashError):
+    """A hash was needed for a requirement but is absent."""
+
+    order = 2
+    head = (
+        "Hashes are required in --require-hashes mode, but they are "
+        "missing from some requirements. Here is a list of those "
+        "requirements along with the hashes their downloaded archives "
+        "actually had. Add lines like these to your requirements files to "
+        "prevent tampering. (If you did not enable --require-hashes "
+        "manually, note that it turns on automatically when any package "
+        "has a hash.)"
+    )
+
+    def __init__(self, gotten_hash: str) -> None:
+        """
+        :param gotten_hash: The hash of the (possibly malicious) archive we
+            just downloaded
+        """
+        self.gotten_hash = gotten_hash
+
+    def body(self) -> str:
+        # Dodge circular import.
+        from pip._internal.utils.hashes import FAVORITE_HASH
+
+        package = None
+        if self.req:
+            # In the case of URL-based requirements, display the original URL
+            # seen in the requirements file rather than the package name,
+            # so the output can be directly copied into the requirements file.
+            package = (
+                self.req.original_link
+                if self.req.original_link
+                # In case someone feeds something downright stupid
+                # to InstallRequirement's constructor.
+                else getattr(self.req, "req", None)
+            )
+        return "    {} --hash={}:{}".format(
+            package or "unknown package", FAVORITE_HASH, self.gotten_hash
+        )
+
+
+class HashUnpinned(HashError):
+    """A requirement had a hash specified but was not pinned to a specific
+    version."""
+
+    order = 3
+    head = (
+        "In --require-hashes mode, all requirements must have their "
+        "versions pinned with ==. These do not:"
+    )
+
+
+class HashMismatch(HashError):
+    """
+    Distribution file hash values don't match.
+
+    :ivar package_name: The name of the package that triggered the hash
+        mismatch. Feel free to write to this after the exception is raise to
+        improve its error message.
+
+    """
+
+    order = 4
+    head = (
+        "THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS "
+        "FILE. If you have updated the package versions, please update "
+        "the hashes. Otherwise, examine the package contents carefully; "
+        "someone may have tampered with them."
+    )
+
+    def __init__(self, allowed: Dict[str, List[str]], gots: Dict[str, "_Hash"]) -> None:
+        """
+        :param allowed: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        :param gots: A dict of algorithm names pointing to hashes we
+            actually got from the files under suspicion
+        """
+        self.allowed = allowed
+        self.gots = gots
+
+    def body(self) -> str:
+        return "    {}:\n{}".format(self._requirement_name(), self._hash_comparison())
+
+    def _hash_comparison(self) -> str:
+        """
+        Return a comparison of actual and expected hash values.
+
+        Example::
+
+               Expected sha256 abcdeabcdeabcdeabcdeabcdeabcdeabcdeabcdeabcde
+                            or 123451234512345123451234512345123451234512345
+                    Got        bcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdefbcdef
+
+        """
+
+        def hash_then_or(hash_name: str) -> "chain[str]":
+            # For now, all the decent hashes have 6-char names, so we can get
+            # away with hard-coding space literals.
+            return chain([hash_name], repeat("    or"))
+
+        lines: List[str] = []
+        for hash_name, expecteds in self.allowed.items():
+            prefix = hash_then_or(hash_name)
+            lines.extend(
+                ("        Expected {} {}".format(next(prefix), e)) for e in expecteds
+            )
+            lines.append(
+                "             Got        {}\n".format(self.gots[hash_name].hexdigest())
+            )
+        return "\n".join(lines)
+
+
+class UnsupportedPythonVersion(InstallationError):
+    """Unsupported python version according to Requires-Python package
+    metadata."""
+
+
+class ConfigurationFileCouldNotBeLoaded(ConfigurationError):
+    """When there are errors while loading a configuration file"""
+
+    def __init__(
+        self,
+        reason: str = "could not be loaded",
+        fname: Optional[str] = None,
+        error: Optional[configparser.Error] = None,
+    ) -> None:
+        super().__init__(error)
+        self.reason = reason
+        self.fname = fname
+        self.error = error
+
+    def __str__(self) -> str:
+        if self.fname is not None:
+            message_part = f" in {self.fname}."
+        else:
+            assert self.error is not None
+            message_part = f".\n{self.error}\n"
+        return f"Configuration file {self.reason}{message_part}"
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/index/__init__.py
new file mode 100644
index 0000000..7a17b7b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/__init__.py
@@ -0,0 +1,2 @@
+"""Index interaction code
+"""
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..75a4cc8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/collector.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/collector.cpython-39.pyc
new file mode 100644
index 0000000..dbcc404
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/collector.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/package_finder.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/package_finder.cpython-39.pyc
new file mode 100644
index 0000000..84b9209
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/package_finder.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/sources.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/sources.cpython-39.pyc
new file mode 100644
index 0000000..708ac58
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/__pycache__/sources.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/collector.py b/venv/lib/python3.9/site-packages/pip/_internal/index/collector.py
new file mode 100644
index 0000000..0120610
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/collector.py
@@ -0,0 +1,505 @@
+"""
+The main purpose of this module is to expose LinkCollector.collect_sources().
+"""
+
+import collections
+import email.message
+import functools
+import itertools
+import json
+import logging
+import os
+import urllib.parse
+import urllib.request
+from html.parser import HTMLParser
+from optparse import Values
+from typing import (
+    TYPE_CHECKING,
+    Callable,
+    Dict,
+    Iterable,
+    List,
+    MutableMapping,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)
+
+from pip._vendor import requests
+from pip._vendor.requests import Response
+from pip._vendor.requests.exceptions import RetryError, SSLError
+
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.models.link import Link
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.network.session import PipSession
+from pip._internal.network.utils import raise_for_status
+from pip._internal.utils.filetypes import is_archive_file
+from pip._internal.utils.misc import redact_auth_from_url
+from pip._internal.vcs import vcs
+
+from .sources import CandidatesFromPage, LinkSource, build_source
+
+if TYPE_CHECKING:
+    from typing import Protocol
+else:
+    Protocol = object
+
+logger = logging.getLogger(__name__)
+
+ResponseHeaders = MutableMapping[str, str]
+
+
+def _match_vcs_scheme(url: str) -> Optional[str]:
+    """Look for VCS schemes in the URL.
+
+    Returns the matched VCS scheme, or None if there's no match.
+    """
+    for scheme in vcs.schemes:
+        if url.lower().startswith(scheme) and url[len(scheme)] in "+:":
+            return scheme
+    return None
+
+
+class _NotAPIContent(Exception):
+    def __init__(self, content_type: str, request_desc: str) -> None:
+        super().__init__(content_type, request_desc)
+        self.content_type = content_type
+        self.request_desc = request_desc
+
+
+def _ensure_api_header(response: Response) -> None:
+    """
+    Check the Content-Type header to ensure the response contains a Simple
+    API Response.
+
+    Raises `_NotAPIContent` if the content type is not a valid content-type.
+    """
+    content_type = response.headers.get("Content-Type", "Unknown")
+
+    content_type_l = content_type.lower()
+    if content_type_l.startswith(
+        (
+            "text/html",
+            "application/vnd.pypi.simple.v1+html",
+            "application/vnd.pypi.simple.v1+json",
+        )
+    ):
+        return
+
+    raise _NotAPIContent(content_type, response.request.method)
+
+
+class _NotHTTP(Exception):
+    pass
+
+
+def _ensure_api_response(url: str, session: PipSession) -> None:
+    """
+    Send a HEAD request to the URL, and ensure the response contains a simple
+    API Response.
+
+    Raises `_NotHTTP` if the URL is not available for a HEAD request, or
+    `_NotAPIContent` if the content type is not a valid content type.
+    """
+    scheme, netloc, path, query, fragment = urllib.parse.urlsplit(url)
+    if scheme not in {"http", "https"}:
+        raise _NotHTTP()
+
+    resp = session.head(url, allow_redirects=True)
+    raise_for_status(resp)
+
+    _ensure_api_header(resp)
+
+
+def _get_simple_response(url: str, session: PipSession) -> Response:
+    """Access an Simple API response with GET, and return the response.
+
+    This consists of three parts:
+
+    1. If the URL looks suspiciously like an archive, send a HEAD first to
+       check the Content-Type is HTML or Simple API, to avoid downloading a
+       large file. Raise `_NotHTTP` if the content type cannot be determined, or
+       `_NotAPIContent` if it is not HTML or a Simple API.
+    2. Actually perform the request. Raise HTTP exceptions on network failures.
+    3. Check the Content-Type header to make sure we got a Simple API response,
+       and raise `_NotAPIContent` otherwise.
+    """
+    if is_archive_file(Link(url).filename):
+        _ensure_api_response(url, session=session)
+
+    logger.debug("Getting page %s", redact_auth_from_url(url))
+
+    resp = session.get(
+        url,
+        headers={
+            "Accept": ", ".join(
+                [
+                    "application/vnd.pypi.simple.v1+json",
+                    "application/vnd.pypi.simple.v1+html; q=0.1",
+                    "text/html; q=0.01",
+                ]
+            ),
+            # We don't want to blindly returned cached data for
+            # /simple/, because authors generally expecting that
+            # twine upload && pip install will function, but if
+            # they've done a pip install in the last ~10 minutes
+            # it won't. Thus by setting this to zero we will not
+            # blindly use any cached data, however the benefit of
+            # using max-age=0 instead of no-cache, is that we will
+            # still support conditional requests, so we will still
+            # minimize traffic sent in cases where the page hasn't
+            # changed at all, we will just always incur the round
+            # trip for the conditional GET now instead of only
+            # once per 10 minutes.
+            # For more information, please see pypa/pip#5670.
+            "Cache-Control": "max-age=0",
+        },
+    )
+    raise_for_status(resp)
+
+    # The check for archives above only works if the url ends with
+    # something that looks like an archive. However that is not a
+    # requirement of an url. Unless we issue a HEAD request on every
+    # url we cannot know ahead of time for sure if something is a
+    # Simple API response or not. However we can check after we've
+    # downloaded it.
+    _ensure_api_header(resp)
+
+    logger.debug(
+        "Fetched page %s as %s",
+        redact_auth_from_url(url),
+        resp.headers.get("Content-Type", "Unknown"),
+    )
+
+    return resp
+
+
+def _get_encoding_from_headers(headers: ResponseHeaders) -> Optional[str]:
+    """Determine if we have any encoding information in our headers."""
+    if headers and "Content-Type" in headers:
+        m = email.message.Message()
+        m["content-type"] = headers["Content-Type"]
+        charset = m.get_param("charset")
+        if charset:
+            return str(charset)
+    return None
+
+
+class CacheablePageContent:
+    def __init__(self, page: "IndexContent") -> None:
+        assert page.cache_link_parsing
+        self.page = page
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, type(self)) and self.page.url == other.page.url
+
+    def __hash__(self) -> int:
+        return hash(self.page.url)
+
+
+class ParseLinks(Protocol):
+    def __call__(self, page: "IndexContent") -> Iterable[Link]:
+        ...
+
+
+def with_cached_index_content(fn: ParseLinks) -> ParseLinks:
+    """
+    Given a function that parses an Iterable[Link] from an IndexContent, cache the
+    function's result (keyed by CacheablePageContent), unless the IndexContent
+    `page` has `page.cache_link_parsing == False`.
+    """
+
+    @functools.lru_cache(maxsize=None)
+    def wrapper(cacheable_page: CacheablePageContent) -> List[Link]:
+        return list(fn(cacheable_page.page))
+
+    @functools.wraps(fn)
+    def wrapper_wrapper(page: "IndexContent") -> List[Link]:
+        if page.cache_link_parsing:
+            return wrapper(CacheablePageContent(page))
+        return list(fn(page))
+
+    return wrapper_wrapper
+
+
+@with_cached_index_content
+def parse_links(page: "IndexContent") -> Iterable[Link]:
+    """
+    Parse a Simple API's Index Content, and yield its anchor elements as Link objects.
+    """
+
+    content_type_l = page.content_type.lower()
+    if content_type_l.startswith("application/vnd.pypi.simple.v1+json"):
+        data = json.loads(page.content)
+        for file in data.get("files", []):
+            link = Link.from_json(file, page.url)
+            if link is None:
+                continue
+            yield link
+        return
+
+    parser = HTMLLinkParser(page.url)
+    encoding = page.encoding or "utf-8"
+    parser.feed(page.content.decode(encoding))
+
+    url = page.url
+    base_url = parser.base_url or url
+    for anchor in parser.anchors:
+        link = Link.from_element(anchor, page_url=url, base_url=base_url)
+        if link is None:
+            continue
+        yield link
+
+
+class IndexContent:
+    """Represents one response (or page), along with its URL"""
+
+    def __init__(
+        self,
+        content: bytes,
+        content_type: str,
+        encoding: Optional[str],
+        url: str,
+        cache_link_parsing: bool = True,
+    ) -> None:
+        """
+        :param encoding: the encoding to decode the given content.
+        :param url: the URL from which the HTML was downloaded.
+        :param cache_link_parsing: whether links parsed from this page's url
+                                   should be cached. PyPI index urls should
+                                   have this set to False, for example.
+        """
+        self.content = content
+        self.content_type = content_type
+        self.encoding = encoding
+        self.url = url
+        self.cache_link_parsing = cache_link_parsing
+
+    def __str__(self) -> str:
+        return redact_auth_from_url(self.url)
+
+
+class HTMLLinkParser(HTMLParser):
+    """
+    HTMLParser that keeps the first base HREF and a list of all anchor
+    elements' attributes.
+    """
+
+    def __init__(self, url: str) -> None:
+        super().__init__(convert_charrefs=True)
+
+        self.url: str = url
+        self.base_url: Optional[str] = None
+        self.anchors: List[Dict[str, Optional[str]]] = []
+
+    def handle_starttag(self, tag: str, attrs: List[Tuple[str, Optional[str]]]) -> None:
+        if tag == "base" and self.base_url is None:
+            href = self.get_href(attrs)
+            if href is not None:
+                self.base_url = href
+        elif tag == "a":
+            self.anchors.append(dict(attrs))
+
+    def get_href(self, attrs: List[Tuple[str, Optional[str]]]) -> Optional[str]:
+        for name, value in attrs:
+            if name == "href":
+                return value
+        return None
+
+
+def _handle_get_simple_fail(
+    link: Link,
+    reason: Union[str, Exception],
+    meth: Optional[Callable[..., None]] = None,
+) -> None:
+    if meth is None:
+        meth = logger.debug
+    meth("Could not fetch URL %s: %s - skipping", link, reason)
+
+
+def _make_index_content(
+    response: Response, cache_link_parsing: bool = True
+) -> IndexContent:
+    encoding = _get_encoding_from_headers(response.headers)
+    return IndexContent(
+        response.content,
+        response.headers["Content-Type"],
+        encoding=encoding,
+        url=response.url,
+        cache_link_parsing=cache_link_parsing,
+    )
+
+
+def _get_index_content(link: Link, *, session: PipSession) -> Optional["IndexContent"]:
+    url = link.url.split("#", 1)[0]
+
+    # Check for VCS schemes that do not support lookup as web pages.
+    vcs_scheme = _match_vcs_scheme(url)
+    if vcs_scheme:
+        logger.warning(
+            "Cannot look at %s URL %s because it does not support lookup as web pages.",
+            vcs_scheme,
+            link,
+        )
+        return None
+
+    # Tack index.html onto file:// URLs that point to directories
+    scheme, _, path, _, _, _ = urllib.parse.urlparse(url)
+    if scheme == "file" and os.path.isdir(urllib.request.url2pathname(path)):
+        # add trailing slash if not present so urljoin doesn't trim
+        # final segment
+        if not url.endswith("/"):
+            url += "/"
+        # TODO: In the future, it would be nice if pip supported PEP 691
+        #       style respones in the file:// URLs, however there's no
+        #       standard file extension for application/vnd.pypi.simple.v1+json
+        #       so we'll need to come up with something on our own.
+        url = urllib.parse.urljoin(url, "index.html")
+        logger.debug(" file: URL is directory, getting %s", url)
+
+    try:
+        resp = _get_simple_response(url, session=session)
+    except _NotHTTP:
+        logger.warning(
+            "Skipping page %s because it looks like an archive, and cannot "
+            "be checked by a HTTP HEAD request.",
+            link,
+        )
+    except _NotAPIContent as exc:
+        logger.warning(
+            "Skipping page %s because the %s request got Content-Type: %s. "
+            "The only supported Content-Types are application/vnd.pypi.simple.v1+json, "
+            "application/vnd.pypi.simple.v1+html, and text/html",
+            link,
+            exc.request_desc,
+            exc.content_type,
+        )
+    except NetworkConnectionError as exc:
+        _handle_get_simple_fail(link, exc)
+    except RetryError as exc:
+        _handle_get_simple_fail(link, exc)
+    except SSLError as exc:
+        reason = "There was a problem confirming the ssl certificate: "
+        reason += str(exc)
+        _handle_get_simple_fail(link, reason, meth=logger.info)
+    except requests.ConnectionError as exc:
+        _handle_get_simple_fail(link, f"connection error: {exc}")
+    except requests.Timeout:
+        _handle_get_simple_fail(link, "timed out")
+    else:
+        return _make_index_content(resp, cache_link_parsing=link.cache_link_parsing)
+    return None
+
+
+class CollectedSources(NamedTuple):
+    find_links: Sequence[Optional[LinkSource]]
+    index_urls: Sequence[Optional[LinkSource]]
+
+
+class LinkCollector:
+
+    """
+    Responsible for collecting Link objects from all configured locations,
+    making network requests as needed.
+
+    The class's main method is its collect_sources() method.
+    """
+
+    def __init__(
+        self,
+        session: PipSession,
+        search_scope: SearchScope,
+    ) -> None:
+        self.search_scope = search_scope
+        self.session = session
+
+    @classmethod
+    def create(
+        cls,
+        session: PipSession,
+        options: Values,
+        suppress_no_index: bool = False,
+    ) -> "LinkCollector":
+        """
+        :param session: The Session to use to make requests.
+        :param suppress_no_index: Whether to ignore the --no-index option
+            when constructing the SearchScope object.
+        """
+        index_urls = [options.index_url] + options.extra_index_urls
+        if options.no_index and not suppress_no_index:
+            logger.debug(
+                "Ignoring indexes: %s",
+                ",".join(redact_auth_from_url(url) for url in index_urls),
+            )
+            index_urls = []
+
+        # Make sure find_links is a list before passing to create().
+        find_links = options.find_links or []
+
+        search_scope = SearchScope.create(
+            find_links=find_links,
+            index_urls=index_urls,
+            no_index=options.no_index,
+        )
+        link_collector = LinkCollector(
+            session=session,
+            search_scope=search_scope,
+        )
+        return link_collector
+
+    @property
+    def find_links(self) -> List[str]:
+        return self.search_scope.find_links
+
+    def fetch_response(self, location: Link) -> Optional[IndexContent]:
+        """
+        Fetch an HTML page containing package links.
+        """
+        return _get_index_content(location, session=self.session)
+
+    def collect_sources(
+        self,
+        project_name: str,
+        candidates_from_page: CandidatesFromPage,
+    ) -> CollectedSources:
+        # The OrderedDict calls deduplicate sources by URL.
+        index_url_sources = collections.OrderedDict(
+            build_source(
+                loc,
+                candidates_from_page=candidates_from_page,
+                page_validator=self.session.is_secure_origin,
+                expand_dir=False,
+                cache_link_parsing=False,
+            )
+            for loc in self.search_scope.get_index_urls_locations(project_name)
+        ).values()
+        find_links_sources = collections.OrderedDict(
+            build_source(
+                loc,
+                candidates_from_page=candidates_from_page,
+                page_validator=self.session.is_secure_origin,
+                expand_dir=True,
+                cache_link_parsing=True,
+            )
+            for loc in self.find_links
+        ).values()
+
+        if logger.isEnabledFor(logging.DEBUG):
+            lines = [
+                f"* {s.link}"
+                for s in itertools.chain(find_links_sources, index_url_sources)
+                if s is not None and s.link is not None
+            ]
+            lines = [
+                f"{len(lines)} location(s) to search "
+                f"for versions of {project_name}:"
+            ] + lines
+            logger.debug("\n".join(lines))
+
+        return CollectedSources(
+            find_links=list(find_links_sources),
+            index_urls=list(index_url_sources),
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/package_finder.py b/venv/lib/python3.9/site-packages/pip/_internal/index/package_finder.py
new file mode 100644
index 0000000..9bf247f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/package_finder.py
@@ -0,0 +1,1025 @@
+"""Routines related to PyPI, indexes"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import enum
+import functools
+import itertools
+import logging
+import re
+from typing import FrozenSet, Iterable, List, Optional, Set, Tuple, Union
+
+from pip._vendor.packaging import specifiers
+from pip._vendor.packaging.tags import Tag
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import _BaseVersion
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled,
+    DistributionNotFound,
+    InvalidWheelFilename,
+    UnsupportedWheel,
+)
+from pip._internal.index.collector import LinkCollector, parse_links
+from pip._internal.models.candidate import InstallationCandidate
+from pip._internal.models.format_control import FormatControl
+from pip._internal.models.link import Link
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.models.target_python import TargetPython
+from pip._internal.models.wheel import Wheel
+from pip._internal.req import InstallRequirement
+from pip._internal.utils._log import getLogger
+from pip._internal.utils.filetypes import WHEEL_EXTENSION
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import build_netloc
+from pip._internal.utils.packaging import check_requires_python
+from pip._internal.utils.unpacking import SUPPORTED_EXTENSIONS
+
+__all__ = ["FormatControl", "BestCandidateResult", "PackageFinder"]
+
+
+logger = getLogger(__name__)
+
+BuildTag = Union[Tuple[()], Tuple[int, str]]
+CandidateSortingKey = Tuple[int, int, int, _BaseVersion, Optional[int], BuildTag]
+
+
+def _check_link_requires_python(
+    link: Link,
+    version_info: Tuple[int, int, int],
+    ignore_requires_python: bool = False,
+) -> bool:
+    """
+    Return whether the given Python version is compatible with a link's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+    """
+    try:
+        is_compatible = check_requires_python(
+            link.requires_python,
+            version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier:
+        logger.debug(
+            "Ignoring invalid Requires-Python (%r) for link: %s",
+            link.requires_python,
+            link,
+        )
+    else:
+        if not is_compatible:
+            version = ".".join(map(str, version_info))
+            if not ignore_requires_python:
+                logger.verbose(
+                    "Link requires a different Python (%s not in: %r): %s",
+                    version,
+                    link.requires_python,
+                    link,
+                )
+                return False
+
+            logger.debug(
+                "Ignoring failed Requires-Python check (%s not in: %r) for link: %s",
+                version,
+                link.requires_python,
+                link,
+            )
+
+    return True
+
+
+class LinkType(enum.Enum):
+    candidate = enum.auto()
+    different_project = enum.auto()
+    yanked = enum.auto()
+    format_unsupported = enum.auto()
+    format_invalid = enum.auto()
+    platform_mismatch = enum.auto()
+    requires_python_mismatch = enum.auto()
+
+
+class LinkEvaluator:
+
+    """
+    Responsible for evaluating links for a particular project.
+    """
+
+    _py_version_re = re.compile(r"-py([123]\.?[0-9]?)$")
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        project_name: str,
+        canonical_name: str,
+        formats: FrozenSet[str],
+        target_python: TargetPython,
+        allow_yanked: bool,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> None:
+        """
+        :param project_name: The user supplied package name.
+        :param canonical_name: The canonical package name.
+        :param formats: The formats allowed for this package. Should be a set
+            with 'binary' or 'source' or both in it.
+        :param target_python: The target Python interpreter to use when
+            evaluating link compatibility. This is used, for example, to
+            check wheel compatibility, as well as when checking the Python
+            version, e.g. the Python version embedded in a link filename
+            (or egg fragment) and against an HTML link's optional PEP 503
+            "data-requires-python" attribute.
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param ignore_requires_python: Whether to ignore incompatible
+            PEP 503 "data-requires-python" values in HTML links. Defaults
+            to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self._allow_yanked = allow_yanked
+        self._canonical_name = canonical_name
+        self._ignore_requires_python = ignore_requires_python
+        self._formats = formats
+        self._target_python = target_python
+
+        self.project_name = project_name
+
+    def evaluate_link(self, link: Link) -> Tuple[LinkType, str]:
+        """
+        Determine whether a link is a candidate for installation.
+
+        :return: A tuple (result, detail), where *result* is an enum
+            representing whether the evaluation found a candidate, or the reason
+            why one is not found. If a candidate is found, *detail* will be the
+            candidate's version string; if one is not found, it contains the
+            reason the link fails to qualify.
+        """
+        version = None
+        if link.is_yanked and not self._allow_yanked:
+            reason = link.yanked_reason or "<none given>"
+            return (LinkType.yanked, f"yanked for reason: {reason}")
+
+        if link.egg_fragment:
+            egg_info = link.egg_fragment
+            ext = link.ext
+        else:
+            egg_info, ext = link.splitext()
+            if not ext:
+                return (LinkType.format_unsupported, "not a file")
+            if ext not in SUPPORTED_EXTENSIONS:
+                return (
+                    LinkType.format_unsupported,
+                    f"unsupported archive format: {ext}",
+                )
+            if "binary" not in self._formats and ext == WHEEL_EXTENSION:
+                reason = f"No binaries permitted for {self.project_name}"
+                return (LinkType.format_unsupported, reason)
+            if "macosx10" in link.path and ext == ".zip":
+                return (LinkType.format_unsupported, "macosx10 one")
+            if ext == WHEEL_EXTENSION:
+                try:
+                    wheel = Wheel(link.filename)
+                except InvalidWheelFilename:
+                    return (
+                        LinkType.format_invalid,
+                        "invalid wheel filename",
+                    )
+                if canonicalize_name(wheel.name) != self._canonical_name:
+                    reason = f"wrong project name (not {self.project_name})"
+                    return (LinkType.different_project, reason)
+
+                supported_tags = self._target_python.get_tags()
+                if not wheel.supported(supported_tags):
+                    # Include the wheel's tags in the reason string to
+                    # simplify troubleshooting compatibility issues.
+                    file_tags = ", ".join(wheel.get_formatted_file_tags())
+                    reason = (
+                        f"none of the wheel's tags ({file_tags}) are compatible "
+                        f"(run pip debug --verbose to show compatible tags)"
+                    )
+                    return (LinkType.platform_mismatch, reason)
+
+                version = wheel.version
+
+        # This should be up by the self.ok_binary check, but see issue 2700.
+        if "source" not in self._formats and ext != WHEEL_EXTENSION:
+            reason = f"No sources permitted for {self.project_name}"
+            return (LinkType.format_unsupported, reason)
+
+        if not version:
+            version = _extract_version_from_fragment(
+                egg_info,
+                self._canonical_name,
+            )
+        if not version:
+            reason = f"Missing project version for {self.project_name}"
+            return (LinkType.format_invalid, reason)
+
+        match = self._py_version_re.search(version)
+        if match:
+            version = version[: match.start()]
+            py_version = match.group(1)
+            if py_version != self._target_python.py_version:
+                return (
+                    LinkType.platform_mismatch,
+                    "Python version is incorrect",
+                )
+
+        supports_python = _check_link_requires_python(
+            link,
+            version_info=self._target_python.py_version_info,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+        if not supports_python:
+            reason = f"{version} Requires-Python {link.requires_python}"
+            return (LinkType.requires_python_mismatch, reason)
+
+        logger.debug("Found link %s, version: %s", link, version)
+
+        return (LinkType.candidate, version)
+
+
+def filter_unallowed_hashes(
+    candidates: List[InstallationCandidate],
+    hashes: Hashes,
+    project_name: str,
+) -> List[InstallationCandidate]:
+    """
+    Filter out candidates whose hashes aren't allowed, and return a new
+    list of candidates.
+
+    If at least one candidate has an allowed hash, then all candidates with
+    either an allowed hash or no hash specified are returned.  Otherwise,
+    the given candidates are returned.
+
+    Including the candidates with no hash specified when there is a match
+    allows a warning to be logged if there is a more preferred candidate
+    with no hash specified.  Returning all candidates in the case of no
+    matches lets pip report the hash of the candidate that would otherwise
+    have been installed (e.g. permitting the user to more easily update
+    their requirements file with the desired hash).
+    """
+    if not hashes:
+        logger.debug(
+            "Given no hashes to check %s links for project %r: "
+            "discarding no candidates",
+            len(candidates),
+            project_name,
+        )
+        # Make sure we're not returning back the given value.
+        return list(candidates)
+
+    matches_or_no_digest = []
+    # Collect the non-matches for logging purposes.
+    non_matches = []
+    match_count = 0
+    for candidate in candidates:
+        link = candidate.link
+        if not link.has_hash:
+            pass
+        elif link.is_hash_allowed(hashes=hashes):
+            match_count += 1
+        else:
+            non_matches.append(candidate)
+            continue
+
+        matches_or_no_digest.append(candidate)
+
+    if match_count:
+        filtered = matches_or_no_digest
+    else:
+        # Make sure we're not returning back the given value.
+        filtered = list(candidates)
+
+    if len(filtered) == len(candidates):
+        discard_message = "discarding no candidates"
+    else:
+        discard_message = "discarding {} non-matches:\n  {}".format(
+            len(non_matches),
+            "\n  ".join(str(candidate.link) for candidate in non_matches),
+        )
+
+    logger.debug(
+        "Checked %s links for project %r against %s hashes "
+        "(%s matches, %s no digest): %s",
+        len(candidates),
+        project_name,
+        hashes.digest_count,
+        match_count,
+        len(matches_or_no_digest) - match_count,
+        discard_message,
+    )
+
+    return filtered
+
+
+class CandidatePreferences:
+
+    """
+    Encapsulates some of the preferences for filtering and sorting
+    InstallationCandidate objects.
+    """
+
+    def __init__(
+        self,
+        prefer_binary: bool = False,
+        allow_all_prereleases: bool = False,
+    ) -> None:
+        """
+        :param allow_all_prereleases: Whether to allow all pre-releases.
+        """
+        self.allow_all_prereleases = allow_all_prereleases
+        self.prefer_binary = prefer_binary
+
+
+class BestCandidateResult:
+    """A collection of candidates, returned by `PackageFinder.find_best_candidate`.
+
+    This class is only intended to be instantiated by CandidateEvaluator's
+    `compute_best_candidate()` method.
+    """
+
+    def __init__(
+        self,
+        candidates: List[InstallationCandidate],
+        applicable_candidates: List[InstallationCandidate],
+        best_candidate: Optional[InstallationCandidate],
+    ) -> None:
+        """
+        :param candidates: A sequence of all available candidates found.
+        :param applicable_candidates: The applicable candidates.
+        :param best_candidate: The most preferred candidate found, or None
+            if no applicable candidates were found.
+        """
+        assert set(applicable_candidates) <= set(candidates)
+
+        if best_candidate is None:
+            assert not applicable_candidates
+        else:
+            assert best_candidate in applicable_candidates
+
+        self._applicable_candidates = applicable_candidates
+        self._candidates = candidates
+
+        self.best_candidate = best_candidate
+
+    def iter_all(self) -> Iterable[InstallationCandidate]:
+        """Iterate through all candidates."""
+        return iter(self._candidates)
+
+    def iter_applicable(self) -> Iterable[InstallationCandidate]:
+        """Iterate through the applicable candidates."""
+        return iter(self._applicable_candidates)
+
+
+class CandidateEvaluator:
+
+    """
+    Responsible for filtering and sorting candidates for installation based
+    on what tags are valid.
+    """
+
+    @classmethod
+    def create(
+        cls,
+        project_name: str,
+        target_python: Optional[TargetPython] = None,
+        prefer_binary: bool = False,
+        allow_all_prereleases: bool = False,
+        specifier: Optional[specifiers.BaseSpecifier] = None,
+        hashes: Optional[Hashes] = None,
+    ) -> "CandidateEvaluator":
+        """Create a CandidateEvaluator object.
+
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+        :param hashes: An optional collection of allowed hashes.
+        """
+        if target_python is None:
+            target_python = TargetPython()
+        if specifier is None:
+            specifier = specifiers.SpecifierSet()
+
+        supported_tags = target_python.get_tags()
+
+        return cls(
+            project_name=project_name,
+            supported_tags=supported_tags,
+            specifier=specifier,
+            prefer_binary=prefer_binary,
+            allow_all_prereleases=allow_all_prereleases,
+            hashes=hashes,
+        )
+
+    def __init__(
+        self,
+        project_name: str,
+        supported_tags: List[Tag],
+        specifier: specifiers.BaseSpecifier,
+        prefer_binary: bool = False,
+        allow_all_prereleases: bool = False,
+        hashes: Optional[Hashes] = None,
+    ) -> None:
+        """
+        :param supported_tags: The PEP 425 tags supported by the target
+            Python in order of preference (most preferred first).
+        """
+        self._allow_all_prereleases = allow_all_prereleases
+        self._hashes = hashes
+        self._prefer_binary = prefer_binary
+        self._project_name = project_name
+        self._specifier = specifier
+        self._supported_tags = supported_tags
+        # Since the index of the tag in the _supported_tags list is used
+        # as a priority, precompute a map from tag to index/priority to be
+        # used in wheel.find_most_preferred_tag.
+        self._wheel_tag_preferences = {
+            tag: idx for idx, tag in enumerate(supported_tags)
+        }
+
+    def get_applicable_candidates(
+        self,
+        candidates: List[InstallationCandidate],
+    ) -> List[InstallationCandidate]:
+        """
+        Return the applicable candidates from a list of candidates.
+        """
+        # Using None infers from the specifier instead.
+        allow_prereleases = self._allow_all_prereleases or None
+        specifier = self._specifier
+        versions = {
+            str(v)
+            for v in specifier.filter(
+                # We turn the version object into a str here because otherwise
+                # when we're debundled but setuptools isn't, Python will see
+                # packaging.version.Version and
+                # pkg_resources._vendor.packaging.version.Version as different
+                # types. This way we'll use a str as a common data interchange
+                # format. If we stop using the pkg_resources provided specifier
+                # and start using our own, we can drop the cast to str().
+                (str(c.version) for c in candidates),
+                prereleases=allow_prereleases,
+            )
+        }
+
+        # Again, converting version to str to deal with debundling.
+        applicable_candidates = [c for c in candidates if str(c.version) in versions]
+
+        filtered_applicable_candidates = filter_unallowed_hashes(
+            candidates=applicable_candidates,
+            hashes=self._hashes,
+            project_name=self._project_name,
+        )
+
+        return sorted(filtered_applicable_candidates, key=self._sort_key)
+
+    def _sort_key(self, candidate: InstallationCandidate) -> CandidateSortingKey:
+        """
+        Function to pass as the `key` argument to a call to sorted() to sort
+        InstallationCandidates by preference.
+
+        Returns a tuple such that tuples sorting as greater using Python's
+        default comparison operator are more preferred.
+
+        The preference is as follows:
+
+        First and foremost, candidates with allowed (matching) hashes are
+        always preferred over candidates without matching hashes. This is
+        because e.g. if the only candidate with an allowed hash is yanked,
+        we still want to use that candidate.
+
+        Second, excepting hash considerations, candidates that have been
+        yanked (in the sense of PEP 592) are always less preferred than
+        candidates that haven't been yanked. Then:
+
+        If not finding wheels, they are sorted by version only.
+        If finding wheels, then the sort order is by version, then:
+          1. existing installs
+          2. wheels ordered via Wheel.support_index_min(self._supported_tags)
+          3. source archives
+        If prefer_binary was set, then all wheels are sorted above sources.
+
+        Note: it was considered to embed this logic into the Link
+              comparison operators, but then different sdist links
+              with the same version, would have to be considered equal
+        """
+        valid_tags = self._supported_tags
+        support_num = len(valid_tags)
+        build_tag: BuildTag = ()
+        binary_preference = 0
+        link = candidate.link
+        if link.is_wheel:
+            # can raise InvalidWheelFilename
+            wheel = Wheel(link.filename)
+            try:
+                pri = -(
+                    wheel.find_most_preferred_tag(
+                        valid_tags, self._wheel_tag_preferences
+                    )
+                )
+            except ValueError:
+                raise UnsupportedWheel(
+                    "{} is not a supported wheel for this platform. It "
+                    "can't be sorted.".format(wheel.filename)
+                )
+            if self._prefer_binary:
+                binary_preference = 1
+            if wheel.build_tag is not None:
+                match = re.match(r"^(\d+)(.*)$", wheel.build_tag)
+                build_tag_groups = match.groups()
+                build_tag = (int(build_tag_groups[0]), build_tag_groups[1])
+        else:  # sdist
+            pri = -(support_num)
+        has_allowed_hash = int(link.is_hash_allowed(self._hashes))
+        yank_value = -1 * int(link.is_yanked)  # -1 for yanked.
+        return (
+            has_allowed_hash,
+            yank_value,
+            binary_preference,
+            candidate.version,
+            pri,
+            build_tag,
+        )
+
+    def sort_best_candidate(
+        self,
+        candidates: List[InstallationCandidate],
+    ) -> Optional[InstallationCandidate]:
+        """
+        Return the best candidate per the instance's sort order, or None if
+        no candidate is acceptable.
+        """
+        if not candidates:
+            return None
+        best_candidate = max(candidates, key=self._sort_key)
+        return best_candidate
+
+    def compute_best_candidate(
+        self,
+        candidates: List[InstallationCandidate],
+    ) -> BestCandidateResult:
+        """
+        Compute and return a `BestCandidateResult` instance.
+        """
+        applicable_candidates = self.get_applicable_candidates(candidates)
+
+        best_candidate = self.sort_best_candidate(applicable_candidates)
+
+        return BestCandidateResult(
+            candidates,
+            applicable_candidates=applicable_candidates,
+            best_candidate=best_candidate,
+        )
+
+
+class PackageFinder:
+    """This finds packages.
+
+    This is meant to match easy_install's technique for looking for
+    packages, by reading pages and looking for appropriate links.
+    """
+
+    def __init__(
+        self,
+        link_collector: LinkCollector,
+        target_python: TargetPython,
+        allow_yanked: bool,
+        format_control: Optional[FormatControl] = None,
+        candidate_prefs: Optional[CandidatePreferences] = None,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> None:
+        """
+        This constructor is primarily meant to be used by the create() class
+        method and from tests.
+
+        :param format_control: A FormatControl object, used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param candidate_prefs: Options to use when creating a
+            CandidateEvaluator object.
+        """
+        if candidate_prefs is None:
+            candidate_prefs = CandidatePreferences()
+
+        format_control = format_control or FormatControl(set(), set())
+
+        self._allow_yanked = allow_yanked
+        self._candidate_prefs = candidate_prefs
+        self._ignore_requires_python = ignore_requires_python
+        self._link_collector = link_collector
+        self._target_python = target_python
+
+        self.format_control = format_control
+
+        # These are boring links that have already been logged somehow.
+        self._logged_links: Set[Tuple[Link, LinkType, str]] = set()
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    @classmethod
+    def create(
+        cls,
+        link_collector: LinkCollector,
+        selection_prefs: SelectionPreferences,
+        target_python: Optional[TargetPython] = None,
+    ) -> "PackageFinder":
+        """Create a PackageFinder.
+
+        :param selection_prefs: The candidate selection preferences, as a
+            SelectionPreferences object.
+        :param target_python: The target Python interpreter to use when
+            checking compatibility. If None (the default), a TargetPython
+            object will be constructed from the running Python.
+        """
+        if target_python is None:
+            target_python = TargetPython()
+
+        candidate_prefs = CandidatePreferences(
+            prefer_binary=selection_prefs.prefer_binary,
+            allow_all_prereleases=selection_prefs.allow_all_prereleases,
+        )
+
+        return cls(
+            candidate_prefs=candidate_prefs,
+            link_collector=link_collector,
+            target_python=target_python,
+            allow_yanked=selection_prefs.allow_yanked,
+            format_control=selection_prefs.format_control,
+            ignore_requires_python=selection_prefs.ignore_requires_python,
+        )
+
+    @property
+    def target_python(self) -> TargetPython:
+        return self._target_python
+
+    @property
+    def search_scope(self) -> SearchScope:
+        return self._link_collector.search_scope
+
+    @search_scope.setter
+    def search_scope(self, search_scope: SearchScope) -> None:
+        self._link_collector.search_scope = search_scope
+
+    @property
+    def find_links(self) -> List[str]:
+        return self._link_collector.find_links
+
+    @property
+    def index_urls(self) -> List[str]:
+        return self.search_scope.index_urls
+
+    @property
+    def trusted_hosts(self) -> Iterable[str]:
+        for host_port in self._link_collector.session.pip_trusted_origins:
+            yield build_netloc(*host_port)
+
+    @property
+    def allow_all_prereleases(self) -> bool:
+        return self._candidate_prefs.allow_all_prereleases
+
+    def set_allow_all_prereleases(self) -> None:
+        self._candidate_prefs.allow_all_prereleases = True
+
+    @property
+    def prefer_binary(self) -> bool:
+        return self._candidate_prefs.prefer_binary
+
+    def set_prefer_binary(self) -> None:
+        self._candidate_prefs.prefer_binary = True
+
+    def requires_python_skipped_reasons(self) -> List[str]:
+        reasons = {
+            detail
+            for _, result, detail in self._logged_links
+            if result == LinkType.requires_python_mismatch
+        }
+        return sorted(reasons)
+
+    def make_link_evaluator(self, project_name: str) -> LinkEvaluator:
+        canonical_name = canonicalize_name(project_name)
+        formats = self.format_control.get_allowed_formats(canonical_name)
+
+        return LinkEvaluator(
+            project_name=project_name,
+            canonical_name=canonical_name,
+            formats=formats,
+            target_python=self._target_python,
+            allow_yanked=self._allow_yanked,
+            ignore_requires_python=self._ignore_requires_python,
+        )
+
+    def _sort_links(self, links: Iterable[Link]) -> List[Link]:
+        """
+        Returns elements of links in order, non-egg links first, egg links
+        second, while eliminating duplicates
+        """
+        eggs, no_eggs = [], []
+        seen: Set[Link] = set()
+        for link in links:
+            if link not in seen:
+                seen.add(link)
+                if link.egg_fragment:
+                    eggs.append(link)
+                else:
+                    no_eggs.append(link)
+        return no_eggs + eggs
+
+    def _log_skipped_link(self, link: Link, result: LinkType, detail: str) -> None:
+        entry = (link, result, detail)
+        if entry not in self._logged_links:
+            # Put the link at the end so the reason is more visible and because
+            # the link string is usually very long.
+            logger.debug("Skipping link: %s: %s", detail, link)
+            self._logged_links.add(entry)
+
+    def get_install_candidate(
+        self, link_evaluator: LinkEvaluator, link: Link
+    ) -> Optional[InstallationCandidate]:
+        """
+        If the link is a candidate for install, convert it to an
+        InstallationCandidate and return it. Otherwise, return None.
+        """
+        result, detail = link_evaluator.evaluate_link(link)
+        if result != LinkType.candidate:
+            self._log_skipped_link(link, result, detail)
+            return None
+
+        return InstallationCandidate(
+            name=link_evaluator.project_name,
+            link=link,
+            version=detail,
+        )
+
+    def evaluate_links(
+        self, link_evaluator: LinkEvaluator, links: Iterable[Link]
+    ) -> List[InstallationCandidate]:
+        """
+        Convert links that are candidates to InstallationCandidate objects.
+        """
+        candidates = []
+        for link in self._sort_links(links):
+            candidate = self.get_install_candidate(link_evaluator, link)
+            if candidate is not None:
+                candidates.append(candidate)
+
+        return candidates
+
+    def process_project_url(
+        self, project_url: Link, link_evaluator: LinkEvaluator
+    ) -> List[InstallationCandidate]:
+        logger.debug(
+            "Fetching project page and analyzing links: %s",
+            project_url,
+        )
+        index_response = self._link_collector.fetch_response(project_url)
+        if index_response is None:
+            return []
+
+        page_links = list(parse_links(index_response))
+
+        with indent_log():
+            package_links = self.evaluate_links(
+                link_evaluator,
+                links=page_links,
+            )
+
+        return package_links
+
+    @functools.lru_cache(maxsize=None)
+    def find_all_candidates(self, project_name: str) -> List[InstallationCandidate]:
+        """Find all available InstallationCandidate for project_name
+
+        This checks index_urls and find_links.
+        All versions found are returned as an InstallationCandidate list.
+
+        See LinkEvaluator.evaluate_link() for details on which files
+        are accepted.
+        """
+        link_evaluator = self.make_link_evaluator(project_name)
+
+        collected_sources = self._link_collector.collect_sources(
+            project_name=project_name,
+            candidates_from_page=functools.partial(
+                self.process_project_url,
+                link_evaluator=link_evaluator,
+            ),
+        )
+
+        page_candidates_it = itertools.chain.from_iterable(
+            source.page_candidates()
+            for sources in collected_sources
+            for source in sources
+            if source is not None
+        )
+        page_candidates = list(page_candidates_it)
+
+        file_links_it = itertools.chain.from_iterable(
+            source.file_links()
+            for sources in collected_sources
+            for source in sources
+            if source is not None
+        )
+        file_candidates = self.evaluate_links(
+            link_evaluator,
+            sorted(file_links_it, reverse=True),
+        )
+
+        if logger.isEnabledFor(logging.DEBUG) and file_candidates:
+            paths = []
+            for candidate in file_candidates:
+                assert candidate.link.url  # we need to have a URL
+                try:
+                    paths.append(candidate.link.file_path)
+                except Exception:
+                    paths.append(candidate.link.url)  # it's not a local file
+
+            logger.debug("Local files found: %s", ", ".join(paths))
+
+        # This is an intentional priority ordering
+        return file_candidates + page_candidates
+
+    def make_candidate_evaluator(
+        self,
+        project_name: str,
+        specifier: Optional[specifiers.BaseSpecifier] = None,
+        hashes: Optional[Hashes] = None,
+    ) -> CandidateEvaluator:
+        """Create a CandidateEvaluator object to use."""
+        candidate_prefs = self._candidate_prefs
+        return CandidateEvaluator.create(
+            project_name=project_name,
+            target_python=self._target_python,
+            prefer_binary=candidate_prefs.prefer_binary,
+            allow_all_prereleases=candidate_prefs.allow_all_prereleases,
+            specifier=specifier,
+            hashes=hashes,
+        )
+
+    @functools.lru_cache(maxsize=None)
+    def find_best_candidate(
+        self,
+        project_name: str,
+        specifier: Optional[specifiers.BaseSpecifier] = None,
+        hashes: Optional[Hashes] = None,
+    ) -> BestCandidateResult:
+        """Find matches for the given project and specifier.
+
+        :param specifier: An optional object implementing `filter`
+            (e.g. `packaging.specifiers.SpecifierSet`) to filter applicable
+            versions.
+
+        :return: A `BestCandidateResult` instance.
+        """
+        candidates = self.find_all_candidates(project_name)
+        candidate_evaluator = self.make_candidate_evaluator(
+            project_name=project_name,
+            specifier=specifier,
+            hashes=hashes,
+        )
+        return candidate_evaluator.compute_best_candidate(candidates)
+
+    def find_requirement(
+        self, req: InstallRequirement, upgrade: bool
+    ) -> Optional[InstallationCandidate]:
+        """Try to find a Link matching req
+
+        Expects req, an InstallRequirement and upgrade, a boolean
+        Returns a InstallationCandidate if found,
+        Raises DistributionNotFound or BestVersionAlreadyInstalled otherwise
+        """
+        hashes = req.hashes(trust_internet=False)
+        best_candidate_result = self.find_best_candidate(
+            req.name,
+            specifier=req.specifier,
+            hashes=hashes,
+        )
+        best_candidate = best_candidate_result.best_candidate
+
+        installed_version: Optional[_BaseVersion] = None
+        if req.satisfied_by is not None:
+            installed_version = req.satisfied_by.version
+
+        def _format_versions(cand_iter: Iterable[InstallationCandidate]) -> str:
+            # This repeated parse_version and str() conversion is needed to
+            # handle different vendoring sources from pip and pkg_resources.
+            # If we stop using the pkg_resources provided specifier and start
+            # using our own, we can drop the cast to str().
+            return (
+                ", ".join(
+                    sorted(
+                        {str(c.version) for c in cand_iter},
+                        key=parse_version,
+                    )
+                )
+                or "none"
+            )
+
+        if installed_version is None and best_candidate is None:
+            logger.critical(
+                "Could not find a version that satisfies the requirement %s "
+                "(from versions: %s)",
+                req,
+                _format_versions(best_candidate_result.iter_all()),
+            )
+
+            raise DistributionNotFound(
+                "No matching distribution found for {}".format(req)
+            )
+
+        best_installed = False
+        if installed_version and (
+            best_candidate is None or best_candidate.version <= installed_version
+        ):
+            best_installed = True
+
+        if not upgrade and installed_version is not None:
+            if best_installed:
+                logger.debug(
+                    "Existing installed version (%s) is most up-to-date and "
+                    "satisfies requirement",
+                    installed_version,
+                )
+            else:
+                logger.debug(
+                    "Existing installed version (%s) satisfies requirement "
+                    "(most up-to-date version is %s)",
+                    installed_version,
+                    best_candidate.version,
+                )
+            return None
+
+        if best_installed:
+            # We have an existing version, and its the best version
+            logger.debug(
+                "Installed version (%s) is most up-to-date (past versions: %s)",
+                installed_version,
+                _format_versions(best_candidate_result.iter_applicable()),
+            )
+            raise BestVersionAlreadyInstalled
+
+        logger.debug(
+            "Using version %s (newest of versions: %s)",
+            best_candidate.version,
+            _format_versions(best_candidate_result.iter_applicable()),
+        )
+        return best_candidate
+
+
+def _find_name_version_sep(fragment: str, canonical_name: str) -> int:
+    """Find the separator's index based on the package's canonical name.
+
+    :param fragment: A <package>+<version> filename "fragment" (stem) or
+        egg fragment.
+    :param canonical_name: The package's canonical name.
+
+    This function is needed since the canonicalized name does not necessarily
+    have the same length as the egg info's name part. An example::
+
+    >>> fragment = 'foo__bar-1.0'
+    >>> canonical_name = 'foo-bar'
+    >>> _find_name_version_sep(fragment, canonical_name)
+    8
+    """
+    # Project name and version must be separated by one single dash. Find all
+    # occurrences of dashes; if the string in front of it matches the canonical
+    # name, this is the one separating the name and version parts.
+    for i, c in enumerate(fragment):
+        if c != "-":
+            continue
+        if canonicalize_name(fragment[:i]) == canonical_name:
+            return i
+    raise ValueError(f"{fragment} does not match {canonical_name}")
+
+
+def _extract_version_from_fragment(fragment: str, canonical_name: str) -> Optional[str]:
+    """Parse the version string from a <package>+<version> filename
+    "fragment" (stem) or egg fragment.
+
+    :param fragment: The string to parse. E.g. foo-2.1
+    :param canonical_name: The canonicalized name of the package this
+        belongs to.
+    """
+    try:
+        version_start = _find_name_version_sep(fragment, canonical_name) + 1
+    except ValueError:
+        return None
+    version = fragment[version_start:]
+    if not version:
+        return None
+    return version
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/index/sources.py b/venv/lib/python3.9/site-packages/pip/_internal/index/sources.py
new file mode 100644
index 0000000..eec3f12
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/index/sources.py
@@ -0,0 +1,224 @@
+import logging
+import mimetypes
+import os
+import pathlib
+from typing import Callable, Iterable, Optional, Tuple
+
+from pip._internal.models.candidate import InstallationCandidate
+from pip._internal.models.link import Link
+from pip._internal.utils.urls import path_to_url, url_to_path
+from pip._internal.vcs import is_url
+
+logger = logging.getLogger(__name__)
+
+FoundCandidates = Iterable[InstallationCandidate]
+FoundLinks = Iterable[Link]
+CandidatesFromPage = Callable[[Link], Iterable[InstallationCandidate]]
+PageValidator = Callable[[Link], bool]
+
+
+class LinkSource:
+    @property
+    def link(self) -> Optional[Link]:
+        """Returns the underlying link, if there's one."""
+        raise NotImplementedError()
+
+    def page_candidates(self) -> FoundCandidates:
+        """Candidates found by parsing an archive listing HTML file."""
+        raise NotImplementedError()
+
+    def file_links(self) -> FoundLinks:
+        """Links found by specifying archives directly."""
+        raise NotImplementedError()
+
+
+def _is_html_file(file_url: str) -> bool:
+    return mimetypes.guess_type(file_url, strict=False)[0] == "text/html"
+
+
+class _FlatDirectorySource(LinkSource):
+    """Link source specified by ``--find-links=<path-to-dir>``.
+
+    This looks the content of the directory, and returns:
+
+    * ``page_candidates``: Links listed on each HTML file in the directory.
+    * ``file_candidates``: Archives in the directory.
+    """
+
+    def __init__(
+        self,
+        candidates_from_page: CandidatesFromPage,
+        path: str,
+    ) -> None:
+        self._candidates_from_page = candidates_from_page
+        self._path = pathlib.Path(os.path.realpath(path))
+
+    @property
+    def link(self) -> Optional[Link]:
+        return None
+
+    def page_candidates(self) -> FoundCandidates:
+        for path in self._path.iterdir():
+            url = path_to_url(str(path))
+            if not _is_html_file(url):
+                continue
+            yield from self._candidates_from_page(Link(url))
+
+    def file_links(self) -> FoundLinks:
+        for path in self._path.iterdir():
+            url = path_to_url(str(path))
+            if _is_html_file(url):
+                continue
+            yield Link(url)
+
+
+class _LocalFileSource(LinkSource):
+    """``--find-links=<path-or-url>`` or ``--[extra-]index-url=<path-or-url>``.
+
+    If a URL is supplied, it must be a ``file:`` URL. If a path is supplied to
+    the option, it is converted to a URL first. This returns:
+
+    * ``page_candidates``: Links listed on an HTML file.
+    * ``file_candidates``: The non-HTML file.
+    """
+
+    def __init__(
+        self,
+        candidates_from_page: CandidatesFromPage,
+        link: Link,
+    ) -> None:
+        self._candidates_from_page = candidates_from_page
+        self._link = link
+
+    @property
+    def link(self) -> Optional[Link]:
+        return self._link
+
+    def page_candidates(self) -> FoundCandidates:
+        if not _is_html_file(self._link.url):
+            return
+        yield from self._candidates_from_page(self._link)
+
+    def file_links(self) -> FoundLinks:
+        if _is_html_file(self._link.url):
+            return
+        yield self._link
+
+
+class _RemoteFileSource(LinkSource):
+    """``--find-links=<url>`` or ``--[extra-]index-url=<url>``.
+
+    This returns:
+
+    * ``page_candidates``: Links listed on an HTML file.
+    * ``file_candidates``: The non-HTML file.
+    """
+
+    def __init__(
+        self,
+        candidates_from_page: CandidatesFromPage,
+        page_validator: PageValidator,
+        link: Link,
+    ) -> None:
+        self._candidates_from_page = candidates_from_page
+        self._page_validator = page_validator
+        self._link = link
+
+    @property
+    def link(self) -> Optional[Link]:
+        return self._link
+
+    def page_candidates(self) -> FoundCandidates:
+        if not self._page_validator(self._link):
+            return
+        yield from self._candidates_from_page(self._link)
+
+    def file_links(self) -> FoundLinks:
+        yield self._link
+
+
+class _IndexDirectorySource(LinkSource):
+    """``--[extra-]index-url=<path-to-directory>``.
+
+    This is treated like a remote URL; ``candidates_from_page`` contains logic
+    for this by appending ``index.html`` to the link.
+    """
+
+    def __init__(
+        self,
+        candidates_from_page: CandidatesFromPage,
+        link: Link,
+    ) -> None:
+        self._candidates_from_page = candidates_from_page
+        self._link = link
+
+    @property
+    def link(self) -> Optional[Link]:
+        return self._link
+
+    def page_candidates(self) -> FoundCandidates:
+        yield from self._candidates_from_page(self._link)
+
+    def file_links(self) -> FoundLinks:
+        return ()
+
+
+def build_source(
+    location: str,
+    *,
+    candidates_from_page: CandidatesFromPage,
+    page_validator: PageValidator,
+    expand_dir: bool,
+    cache_link_parsing: bool,
+) -> Tuple[Optional[str], Optional[LinkSource]]:
+
+    path: Optional[str] = None
+    url: Optional[str] = None
+    if os.path.exists(location):  # Is a local path.
+        url = path_to_url(location)
+        path = location
+    elif location.startswith("file:"):  # A file: URL.
+        url = location
+        path = url_to_path(location)
+    elif is_url(location):
+        url = location
+
+    if url is None:
+        msg = (
+            "Location '%s' is ignored: "
+            "it is either a non-existing path or lacks a specific scheme."
+        )
+        logger.warning(msg, location)
+        return (None, None)
+
+    if path is None:
+        source: LinkSource = _RemoteFileSource(
+            candidates_from_page=candidates_from_page,
+            page_validator=page_validator,
+            link=Link(url, cache_link_parsing=cache_link_parsing),
+        )
+        return (url, source)
+
+    if os.path.isdir(path):
+        if expand_dir:
+            source = _FlatDirectorySource(
+                candidates_from_page=candidates_from_page,
+                path=path,
+            )
+        else:
+            source = _IndexDirectorySource(
+                candidates_from_page=candidates_from_page,
+                link=Link(url, cache_link_parsing=cache_link_parsing),
+            )
+        return (url, source)
+    elif os.path.isfile(path):
+        source = _LocalFileSource(
+            candidates_from_page=candidates_from_page,
+            link=Link(url, cache_link_parsing=cache_link_parsing),
+        )
+        return (url, source)
+    logger.warning(
+        "Location '%s' is ignored: it is neither a file nor a directory.",
+        location,
+    )
+    return (url, None)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/locations/__init__.py
new file mode 100644
index 0000000..60afe0a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/locations/__init__.py
@@ -0,0 +1,528 @@
+import functools
+import logging
+import os
+import pathlib
+import sys
+import sysconfig
+from typing import Any, Dict, Generator, List, Optional, Tuple
+
+from pip._internal.models.scheme import SCHEME_KEYS, Scheme
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+from . import _sysconfig
+from .base import (
+    USER_CACHE_DIR,
+    get_major_minor_version,
+    get_src_prefix,
+    is_osx_framework,
+    site_packages,
+    user_site,
+)
+
+__all__ = [
+    "USER_CACHE_DIR",
+    "get_bin_prefix",
+    "get_bin_user",
+    "get_major_minor_version",
+    "get_platlib",
+    "get_prefixed_libs",
+    "get_purelib",
+    "get_scheme",
+    "get_src_prefix",
+    "site_packages",
+    "user_site",
+]
+
+
+logger = logging.getLogger(__name__)
+
+
+_PLATLIBDIR: str = getattr(sys, "platlibdir", "lib")
+
+_USE_SYSCONFIG_DEFAULT = sys.version_info >= (3, 10)
+
+
+def _should_use_sysconfig() -> bool:
+    """This function determines the value of _USE_SYSCONFIG.
+
+    By default, pip uses sysconfig on Python 3.10+.
+    But Python distributors can override this decision by setting:
+        sysconfig._PIP_USE_SYSCONFIG = True / False
+    Rationale in https://github.com/pypa/pip/issues/10647
+
+    This is a function for testability, but should be constant during any one
+    run.
+    """
+    return bool(getattr(sysconfig, "_PIP_USE_SYSCONFIG", _USE_SYSCONFIG_DEFAULT))
+
+
+_USE_SYSCONFIG = _should_use_sysconfig()
+
+if not _USE_SYSCONFIG:
+    # Import distutils lazily to avoid deprecation warnings,
+    # but import it soon enough that it is in memory and available during
+    # a pip reinstall.
+    from . import _distutils
+
+# Be noisy about incompatibilities if this platforms "should" be using
+# sysconfig, but is explicitly opting out and using distutils instead.
+if _USE_SYSCONFIG_DEFAULT and not _USE_SYSCONFIG:
+    _MISMATCH_LEVEL = logging.WARNING
+else:
+    _MISMATCH_LEVEL = logging.DEBUG
+
+
+def _looks_like_bpo_44860() -> bool:
+    """The resolution to bpo-44860 will change this incorrect platlib.
+
+    See <https://bugs.python.org/issue44860>.
+    """
+    from distutils.command.install import INSTALL_SCHEMES
+
+    try:
+        unix_user_platlib = INSTALL_SCHEMES["unix_user"]["platlib"]
+    except KeyError:
+        return False
+    return unix_user_platlib == "$usersite"
+
+
+def _looks_like_red_hat_patched_platlib_purelib(scheme: Dict[str, str]) -> bool:
+    platlib = scheme["platlib"]
+    if "/$platlibdir/" in platlib:
+        platlib = platlib.replace("/$platlibdir/", f"/{_PLATLIBDIR}/")
+    if "/lib64/" not in platlib:
+        return False
+    unpatched = platlib.replace("/lib64/", "/lib/")
+    return unpatched.replace("$platbase/", "$base/") == scheme["purelib"]
+
+
+@functools.lru_cache(maxsize=None)
+def _looks_like_red_hat_lib() -> bool:
+    """Red Hat patches platlib in unix_prefix and unix_home, but not purelib.
+
+    This is the only way I can see to tell a Red Hat-patched Python.
+    """
+    from distutils.command.install import INSTALL_SCHEMES
+
+    return all(
+        k in INSTALL_SCHEMES
+        and _looks_like_red_hat_patched_platlib_purelib(INSTALL_SCHEMES[k])
+        for k in ("unix_prefix", "unix_home")
+    )
+
+
+@functools.lru_cache(maxsize=None)
+def _looks_like_debian_scheme() -> bool:
+    """Debian adds two additional schemes."""
+    from distutils.command.install import INSTALL_SCHEMES
+
+    return "deb_system" in INSTALL_SCHEMES and "unix_local" in INSTALL_SCHEMES
+
+
+@functools.lru_cache(maxsize=None)
+def _looks_like_red_hat_scheme() -> bool:
+    """Red Hat patches ``sys.prefix`` and ``sys.exec_prefix``.
+
+    Red Hat's ``00251-change-user-install-location.patch`` changes the install
+    command's ``prefix`` and ``exec_prefix`` to append ``"/local"``. This is
+    (fortunately?) done quite unconditionally, so we create a default command
+    object without any configuration to detect this.
+    """
+    from distutils.command.install import install
+    from distutils.dist import Distribution
+
+    cmd: Any = install(Distribution())
+    cmd.finalize_options()
+    return (
+        cmd.exec_prefix == f"{os.path.normpath(sys.exec_prefix)}/local"
+        and cmd.prefix == f"{os.path.normpath(sys.prefix)}/local"
+    )
+
+
+@functools.lru_cache(maxsize=None)
+def _looks_like_slackware_scheme() -> bool:
+    """Slackware patches sysconfig but fails to patch distutils and site.
+
+    Slackware changes sysconfig's user scheme to use ``"lib64"`` for the lib
+    path, but does not do the same to the site module.
+    """
+    if user_site is None:  # User-site not available.
+        return False
+    try:
+        paths = sysconfig.get_paths(scheme="posix_user", expand=False)
+    except KeyError:  # User-site not available.
+        return False
+    return "/lib64/" in paths["purelib"] and "/lib64/" not in user_site
+
+
+@functools.lru_cache(maxsize=None)
+def _looks_like_msys2_mingw_scheme() -> bool:
+    """MSYS2 patches distutils and sysconfig to use a UNIX-like scheme.
+
+    However, MSYS2 incorrectly patches sysconfig ``nt`` scheme. The fix is
+    likely going to be included in their 3.10 release, so we ignore the warning.
+    See msys2/MINGW-packages#9319.
+
+    MSYS2 MINGW's patch uses lowercase ``"lib"`` instead of the usual uppercase,
+    and is missing the final ``"site-packages"``.
+    """
+    paths = sysconfig.get_paths("nt", expand=False)
+    return all(
+        "Lib" not in p and "lib" in p and not p.endswith("site-packages")
+        for p in (paths[key] for key in ("platlib", "purelib"))
+    )
+
+
+def _fix_abiflags(parts: Tuple[str]) -> Generator[str, None, None]:
+    ldversion = sysconfig.get_config_var("LDVERSION")
+    abiflags = getattr(sys, "abiflags", None)
+
+    # LDVERSION does not end with sys.abiflags. Just return the path unchanged.
+    if not ldversion or not abiflags or not ldversion.endswith(abiflags):
+        yield from parts
+        return
+
+    # Strip sys.abiflags from LDVERSION-based path components.
+    for part in parts:
+        if part.endswith(ldversion):
+            part = part[: (0 - len(abiflags))]
+        yield part
+
+
+@functools.lru_cache(maxsize=None)
+def _warn_mismatched(old: pathlib.Path, new: pathlib.Path, *, key: str) -> None:
+    issue_url = "https://github.com/pypa/pip/issues/10151"
+    message = (
+        "Value for %s does not match. Please report this to <%s>"
+        "\ndistutils: %s"
+        "\nsysconfig: %s"
+    )
+    logger.log(_MISMATCH_LEVEL, message, key, issue_url, old, new)
+
+
+def _warn_if_mismatch(old: pathlib.Path, new: pathlib.Path, *, key: str) -> bool:
+    if old == new:
+        return False
+    _warn_mismatched(old, new, key=key)
+    return True
+
+
+@functools.lru_cache(maxsize=None)
+def _log_context(
+    *,
+    user: bool = False,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
+    prefix: Optional[str] = None,
+) -> None:
+    parts = [
+        "Additional context:",
+        "user = %r",
+        "home = %r",
+        "root = %r",
+        "prefix = %r",
+    ]
+
+    logger.log(_MISMATCH_LEVEL, "\n".join(parts), user, home, root, prefix)
+
+
+def get_scheme(
+    dist_name: str,
+    user: bool = False,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
+    isolated: bool = False,
+    prefix: Optional[str] = None,
+) -> Scheme:
+    new = _sysconfig.get_scheme(
+        dist_name,
+        user=user,
+        home=home,
+        root=root,
+        isolated=isolated,
+        prefix=prefix,
+    )
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_scheme(
+        dist_name,
+        user=user,
+        home=home,
+        root=root,
+        isolated=isolated,
+        prefix=prefix,
+    )
+
+    warning_contexts = []
+    for k in SCHEME_KEYS:
+        old_v = pathlib.Path(getattr(old, k))
+        new_v = pathlib.Path(getattr(new, k))
+
+        if old_v == new_v:
+            continue
+
+        # distutils incorrectly put PyPy packages under ``site-packages/python``
+        # in the ``posix_home`` scheme, but PyPy devs said they expect the
+        # directory name to be ``pypy`` instead. So we treat this as a bug fix
+        # and not warn about it. See bpo-43307 and python/cpython#24628.
+        skip_pypy_special_case = (
+            sys.implementation.name == "pypy"
+            and home is not None
+            and k in ("platlib", "purelib")
+            and old_v.parent == new_v.parent
+            and old_v.name.startswith("python")
+            and new_v.name.startswith("pypy")
+        )
+        if skip_pypy_special_case:
+            continue
+
+        # sysconfig's ``osx_framework_user`` does not include ``pythonX.Y`` in
+        # the ``include`` value, but distutils's ``headers`` does. We'll let
+        # CPython decide whether this is a bug or feature. See bpo-43948.
+        skip_osx_framework_user_special_case = (
+            user
+            and is_osx_framework()
+            and k == "headers"
+            and old_v.parent.parent == new_v.parent
+            and old_v.parent.name.startswith("python")
+        )
+        if skip_osx_framework_user_special_case:
+            continue
+
+        # On Red Hat and derived Linux distributions, distutils is patched to
+        # use "lib64" instead of "lib" for platlib.
+        if k == "platlib" and _looks_like_red_hat_lib():
+            continue
+
+        # On Python 3.9+, sysconfig's posix_user scheme sets platlib against
+        # sys.platlibdir, but distutils's unix_user incorrectly coninutes
+        # using the same $usersite for both platlib and purelib. This creates a
+        # mismatch when sys.platlibdir is not "lib".
+        skip_bpo_44860 = (
+            user
+            and k == "platlib"
+            and not WINDOWS
+            and sys.version_info >= (3, 9)
+            and _PLATLIBDIR != "lib"
+            and _looks_like_bpo_44860()
+        )
+        if skip_bpo_44860:
+            continue
+
+        # Slackware incorrectly patches posix_user to use lib64 instead of lib,
+        # but not usersite to match the location.
+        skip_slackware_user_scheme = (
+            user
+            and k in ("platlib", "purelib")
+            and not WINDOWS
+            and _looks_like_slackware_scheme()
+        )
+        if skip_slackware_user_scheme:
+            continue
+
+        # Both Debian and Red Hat patch Python to place the system site under
+        # /usr/local instead of /usr. Debian also places lib in dist-packages
+        # instead of site-packages, but the /usr/local check should cover it.
+        skip_linux_system_special_case = (
+            not (user or home or prefix or running_under_virtualenv())
+            and old_v.parts[1:3] == ("usr", "local")
+            and len(new_v.parts) > 1
+            and new_v.parts[1] == "usr"
+            and (len(new_v.parts) < 3 or new_v.parts[2] != "local")
+            and (_looks_like_red_hat_scheme() or _looks_like_debian_scheme())
+        )
+        if skip_linux_system_special_case:
+            continue
+
+        # On Python 3.7 and earlier, sysconfig does not include sys.abiflags in
+        # the "pythonX.Y" part of the path, but distutils does.
+        skip_sysconfig_abiflag_bug = (
+            sys.version_info < (3, 8)
+            and not WINDOWS
+            and k in ("headers", "platlib", "purelib")
+            and tuple(_fix_abiflags(old_v.parts)) == new_v.parts
+        )
+        if skip_sysconfig_abiflag_bug:
+            continue
+
+        # MSYS2 MINGW's sysconfig patch does not include the "site-packages"
+        # part of the path. This is incorrect and will be fixed in MSYS.
+        skip_msys2_mingw_bug = (
+            WINDOWS and k in ("platlib", "purelib") and _looks_like_msys2_mingw_scheme()
+        )
+        if skip_msys2_mingw_bug:
+            continue
+
+        # CPython's POSIX install script invokes pip (via ensurepip) against the
+        # interpreter located in the source tree, not the install site. This
+        # triggers special logic in sysconfig that's not present in distutils.
+        # https://github.com/python/cpython/blob/8c21941ddaf/Lib/sysconfig.py#L178-L194
+        skip_cpython_build = (
+            sysconfig.is_python_build(check_home=True)
+            and not WINDOWS
+            and k in ("headers", "include", "platinclude")
+        )
+        if skip_cpython_build:
+            continue
+
+        warning_contexts.append((old_v, new_v, f"scheme.{k}"))
+
+    if not warning_contexts:
+        return old
+
+    # Check if this path mismatch is caused by distutils config files. Those
+    # files will no longer work once we switch to sysconfig, so this raises a
+    # deprecation message for them.
+    default_old = _distutils.distutils_scheme(
+        dist_name,
+        user,
+        home,
+        root,
+        isolated,
+        prefix,
+        ignore_config_files=True,
+    )
+    if any(default_old[k] != getattr(old, k) for k in SCHEME_KEYS):
+        deprecated(
+            reason=(
+                "Configuring installation scheme with distutils config files "
+                "is deprecated and will no longer work in the near future. If you "
+                "are using a Homebrew or Linuxbrew Python, please see discussion "
+                "at https://github.com/Homebrew/homebrew-core/issues/76621"
+            ),
+            replacement=None,
+            gone_in=None,
+        )
+        return old
+
+    # Post warnings about this mismatch so user can report them back.
+    for old_v, new_v, key in warning_contexts:
+        _warn_mismatched(old_v, new_v, key=key)
+    _log_context(user=user, home=home, root=root, prefix=prefix)
+
+    return old
+
+
+def get_bin_prefix() -> str:
+    new = _sysconfig.get_bin_prefix()
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_bin_prefix()
+    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="bin_prefix"):
+        _log_context()
+    return old
+
+
+def get_bin_user() -> str:
+    return _sysconfig.get_scheme("", user=True).scripts
+
+
+def _looks_like_deb_system_dist_packages(value: str) -> bool:
+    """Check if the value is Debian's APT-controlled dist-packages.
+
+    Debian's ``distutils.sysconfig.get_python_lib()`` implementation returns the
+    default package path controlled by APT, but does not patch ``sysconfig`` to
+    do the same. This is similar to the bug worked around in ``get_scheme()``,
+    but here the default is ``deb_system`` instead of ``unix_local``. Ultimately
+    we can't do anything about this Debian bug, and this detection allows us to
+    skip the warning when needed.
+    """
+    if not _looks_like_debian_scheme():
+        return False
+    if value == "/usr/lib/python3/dist-packages":
+        return True
+    return False
+
+
+def get_purelib() -> str:
+    """Return the default pure-Python lib location."""
+    new = _sysconfig.get_purelib()
+    if _USE_SYSCONFIG:
+        return new
+
+    old = _distutils.get_purelib()
+    if _looks_like_deb_system_dist_packages(old):
+        return old
+    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="purelib"):
+        _log_context()
+    return old
+
+
+def get_platlib() -> str:
+    """Return the default platform-shared lib location."""
+    new = _sysconfig.get_platlib()
+    if _USE_SYSCONFIG:
+        return new
+
+    from . import _distutils
+
+    old = _distutils.get_platlib()
+    if _looks_like_deb_system_dist_packages(old):
+        return old
+    if _warn_if_mismatch(pathlib.Path(old), pathlib.Path(new), key="platlib"):
+        _log_context()
+    return old
+
+
+def _deduplicated(v1: str, v2: str) -> List[str]:
+    """Deduplicate values from a list."""
+    if v1 == v2:
+        return [v1]
+    return [v1, v2]
+
+
+def _looks_like_apple_library(path: str) -> bool:
+    """Apple patches sysconfig to *always* look under */Library/Python*."""
+    if sys.platform[:6] != "darwin":
+        return False
+    return path == f"/Library/Python/{get_major_minor_version()}/site-packages"
+
+
+def get_prefixed_libs(prefix: str) -> List[str]:
+    """Return the lib locations under ``prefix``."""
+    new_pure, new_plat = _sysconfig.get_prefixed_libs(prefix)
+    if _USE_SYSCONFIG:
+        return _deduplicated(new_pure, new_plat)
+
+    old_pure, old_plat = _distutils.get_prefixed_libs(prefix)
+    old_lib_paths = _deduplicated(old_pure, old_plat)
+
+    # Apple's Python (shipped with Xcode and Command Line Tools) hard-code
+    # platlib and purelib to '/Library/Python/X.Y/site-packages'. This will
+    # cause serious build isolation bugs when Apple starts shipping 3.10 because
+    # pip will install build backends to the wrong location. This tells users
+    # who is at fault so Apple may notice it and fix the issue in time.
+    if all(_looks_like_apple_library(p) for p in old_lib_paths):
+        deprecated(
+            reason=(
+                "Python distributed by Apple's Command Line Tools incorrectly "
+                "patches sysconfig to always point to '/Library/Python'. This "
+                "will cause build isolation to operate incorrectly on Python "
+                "3.10 or later. Please help report this to Apple so they can "
+                "fix this. https://developer.apple.com/bug-reporting/"
+            ),
+            replacement=None,
+            gone_in=None,
+        )
+        return old_lib_paths
+
+    warned = [
+        _warn_if_mismatch(
+            pathlib.Path(old_pure),
+            pathlib.Path(new_pure),
+            key="prefixed-purelib",
+        ),
+        _warn_if_mismatch(
+            pathlib.Path(old_plat),
+            pathlib.Path(new_plat),
+            key="prefixed-platlib",
+        ),
+    ]
+    if any(warned):
+        _log_context(prefix=prefix)
+
+    return old_lib_paths
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/locations/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/__pycache__/base.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/locations/__pycache__/base.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/_distutils.py b/venv/lib/python3.9/site-packages/pip/_internal/locations/_distutils.py
new file mode 100644
index 0000000..c7712f0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/locations/_distutils.py
@@ -0,0 +1,180 @@
+"""Locations where we look for configs, install stuff, etc"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+# If pip's going to use distutils, it should not be using the copy that setuptools
+# might have injected into the environment. This is done by removing the injected
+# shim, if it's injected.
+#
+# See https://github.com/pypa/pip/issues/8761 for the original discussion and
+# rationale for why this is done within pip.
+try:
+    __import__("_distutils_hack").remove_shim()
+except (ImportError, AttributeError):
+    pass
+
+import logging
+import os
+import sys
+from distutils.cmd import Command as DistutilsCommand
+from distutils.command.install import SCHEME_KEYS
+from distutils.command.install import install as distutils_install_command
+from distutils.sysconfig import get_python_lib
+from typing import Dict, List, Optional, Tuple, Union, cast
+
+from pip._internal.models.scheme import Scheme
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+from .base import get_major_minor_version
+
+logger = logging.getLogger(__name__)
+
+
+def distutils_scheme(
+    dist_name: str,
+    user: bool = False,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
+    isolated: bool = False,
+    prefix: Optional[str] = None,
+    *,
+    ignore_config_files: bool = False,
+) -> Dict[str, str]:
+    """
+    Return a distutils install scheme
+    """
+    from distutils.dist import Distribution
+
+    dist_args: Dict[str, Union[str, List[str]]] = {"name": dist_name}
+    if isolated:
+        dist_args["script_args"] = ["--no-user-cfg"]
+
+    d = Distribution(dist_args)
+    if not ignore_config_files:
+        try:
+            d.parse_config_files()
+        except UnicodeDecodeError:
+            # Typeshed does not include find_config_files() for some reason.
+            paths = d.find_config_files()  # type: ignore
+            logger.warning(
+                "Ignore distutils configs in %s due to encoding errors.",
+                ", ".join(os.path.basename(p) for p in paths),
+            )
+    obj: Optional[DistutilsCommand] = None
+    obj = d.get_command_obj("install", create=True)
+    assert obj is not None
+    i = cast(distutils_install_command, obj)
+    # NOTE: setting user or home has the side-effect of creating the home dir
+    # or user base for installations during finalize_options()
+    # ideally, we'd prefer a scheme class that has no side-effects.
+    assert not (user and prefix), f"user={user} prefix={prefix}"
+    assert not (home and prefix), f"home={home} prefix={prefix}"
+    i.user = user or i.user
+    if user or home:
+        i.prefix = ""
+    i.prefix = prefix or i.prefix
+    i.home = home or i.home
+    i.root = root or i.root
+    i.finalize_options()
+
+    scheme = {}
+    for key in SCHEME_KEYS:
+        scheme[key] = getattr(i, "install_" + key)
+
+    # install_lib specified in setup.cfg should install *everything*
+    # into there (i.e. it takes precedence over both purelib and
+    # platlib).  Note, i.install_lib is *always* set after
+    # finalize_options(); we only want to override here if the user
+    # has explicitly requested it hence going back to the config
+    if "install_lib" in d.get_option_dict("install"):
+        scheme.update(dict(purelib=i.install_lib, platlib=i.install_lib))
+
+    if running_under_virtualenv():
+        if home:
+            prefix = home
+        elif user:
+            prefix = i.install_userbase
+        else:
+            prefix = i.prefix
+        scheme["headers"] = os.path.join(
+            prefix,
+            "include",
+            "site",
+            f"python{get_major_minor_version()}",
+            dist_name,
+        )
+
+        if root is not None:
+            path_no_drive = os.path.splitdrive(os.path.abspath(scheme["headers"]))[1]
+            scheme["headers"] = os.path.join(root, path_no_drive[1:])
+
+    return scheme
+
+
+def get_scheme(
+    dist_name: str,
+    user: bool = False,
+    home: Optional[str] = None,
+    root: Optional[str] = None,
+    isolated: bool = False,
+    prefix: Optional[str] = None,
+) -> Scheme:
+    """
+    Get the "scheme" corresponding to the input parameters. The distutils
+    documentation provides the context for the available schemes:
+    https://docs.python.org/3/install/index.html#alternate-installation
+
+    :param dist_name: the name of the package to retrieve the scheme for, used
+        in the headers scheme path
+    :param user: indicates to use the "user" scheme
+    :param home: indicates to use the "home" scheme and provides the base
+        directory for the same
+    :param root: root under which other directories are re-based
+    :param isolated: equivalent to --no-user-cfg, i.e. do not consider
+        ~/.pydistutils.cfg (posix) or ~/pydistutils.cfg (non-posix) for
+        scheme paths
+    :param prefix: indicates to use the "prefix" scheme and provides the
+        base directory for the same
+    """
+    scheme = distutils_scheme(dist_name, user, home, root, isolated, prefix)
+    return Scheme(
+        platlib=scheme["platlib"],
+        purelib=scheme["purelib"],
+        headers=scheme["headers"],
+        scripts=scheme["scripts"],
+        data=scheme["data"],
+    )
+
+
+def get_bin_prefix() -> str:
+    # XXX: In old virtualenv versions, sys.prefix can contain '..' components,
+    # so we need to call normpath to eliminate them.
+    prefix = os.path.normpath(sys.prefix)
+    if WINDOWS:
+        bin_py = os.path.join(prefix, "Scripts")
+        # buildout uses 'bin' on Windows too?
+        if not os.path.exists(bin_py):
+            bin_py = os.path.join(prefix, "bin")
+        return bin_py
+    # Forcing to use /usr/local/bin for standard macOS framework installs
+    # Also log to ~/Library/Logs/ for use with the Console.app log viewer
+    if sys.platform[:6] == "darwin" and prefix[:16] == "/System/Library/":
+        return "/usr/local/bin"
+    return os.path.join(prefix, "bin")
+
+
+def get_purelib() -> str:
+    return get_python_lib(plat_specific=False)
+
+
+def get_platlib() -> str:
+    return get_python_lib(plat_specific=True)
+
+
+def get_prefixed_libs(prefix: str) -> Tuple[str, str]:
+    return (
+        get_python_lib(plat_specific=False, prefix=prefix),
+        get_python_lib(plat_specific=True, prefix=prefix),
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/_sysconfig.py b/venv/lib/python3.9/site-packages/pip/_internal/locations/_sysconfig.py
new file mode 100644
index 0000000..0bbc928
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/locations/_sysconfig.py
@@ -0,0 +1,218 @@
+import logging
+import os
+import sys
+import sysconfig
+import typing
+
+from pip._internal.exceptions import InvalidSchemeCombination, UserInstallationInvalid
+from pip._internal.models.scheme import SCHEME_KEYS, Scheme
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+from .base import change_root, get_major_minor_version, is_osx_framework
+
+logger = logging.getLogger(__name__)
+
+
+# Notes on _infer_* functions.
+# Unfortunately ``get_default_scheme()`` didn't exist before 3.10, so there's no
+# way to ask things like "what is the '_prefix' scheme on this platform". These
+# functions try to answer that with some heuristics while accounting for ad-hoc
+# platforms not covered by CPython's default sysconfig implementation. If the
+# ad-hoc implementation does not fully implement sysconfig, we'll fall back to
+# a POSIX scheme.
+
+_AVAILABLE_SCHEMES = set(sysconfig.get_scheme_names())
+
+_PREFERRED_SCHEME_API = getattr(sysconfig, "get_preferred_scheme", None)
+
+
+def _should_use_osx_framework_prefix() -> bool:
+    """Check for Apple's ``osx_framework_library`` scheme.
+
+    Python distributed by Apple's Command Line Tools has this special scheme
+    that's used when:
+
+    * This is a framework build.
+    * We are installing into the system prefix.
+
+    This does not account for ``pip install --prefix`` (also means we're not
+    installing to the system prefix), which should use ``posix_prefix``, but
+    logic here means ``_infer_prefix()`` outputs ``osx_framework_library``. But
+    since ``prefix`` is not available for ``sysconfig.get_default_scheme()``,
+    which is the stdlib replacement for ``_infer_prefix()``, presumably Apple
+    wouldn't be able to magically switch between ``osx_framework_library`` and
+    ``posix_prefix``. ``_infer_prefix()`` returning ``osx_framework_library``
+    means its behavior is consistent whether we use the stdlib implementation
+    or our own, and we deal with this special case in ``get_scheme()`` instead.
+    """
+    return (
+        "osx_framework_library" in _AVAILABLE_SCHEMES
+        and not running_under_virtualenv()
+        and is_osx_framework()
+    )
+
+
+def _infer_prefix() -> str:
+    """Try to find a prefix scheme for the current platform.
+
+    This tries:
+
+    * A special ``osx_framework_library`` for Python distributed by Apple's
+      Command Line Tools, when not running in a virtual environment.
+    * Implementation + OS, used by PyPy on Windows (``pypy_nt``).
+    * Implementation without OS, used by PyPy on POSIX (``pypy``).
+    * OS + "prefix", used by CPython on POSIX (``posix_prefix``).
+    * Just the OS name, used by CPython on Windows (``nt``).
+
+    If none of the above works, fall back to ``posix_prefix``.
+    """
+    if _PREFERRED_SCHEME_API:
+        return _PREFERRED_SCHEME_API("prefix")
+    if _should_use_osx_framework_prefix():
+        return "osx_framework_library"
+    implementation_suffixed = f"{sys.implementation.name}_{os.name}"
+    if implementation_suffixed in _AVAILABLE_SCHEMES:
+        return implementation_suffixed
+    if sys.implementation.name in _AVAILABLE_SCHEMES:
+        return sys.implementation.name
+    suffixed = f"{os.name}_prefix"
+    if suffixed in _AVAILABLE_SCHEMES:
+        return suffixed
+    if os.name in _AVAILABLE_SCHEMES:  # On Windows, prefx is just called "nt".
+        return os.name
+    return "posix_prefix"
+
+
+def _infer_user() -> str:
+    """Try to find a user scheme for the current platform."""
+    if _PREFERRED_SCHEME_API:
+        return _PREFERRED_SCHEME_API("user")
+    if is_osx_framework() and not running_under_virtualenv():
+        suffixed = "osx_framework_user"
+    else:
+        suffixed = f"{os.name}_user"
+    if suffixed in _AVAILABLE_SCHEMES:
+        return suffixed
+    if "posix_user" not in _AVAILABLE_SCHEMES:  # User scheme unavailable.
+        raise UserInstallationInvalid()
+    return "posix_user"
+
+
+def _infer_home() -> str:
+    """Try to find a home for the current platform."""
+    if _PREFERRED_SCHEME_API:
+        return _PREFERRED_SCHEME_API("home")
+    suffixed = f"{os.name}_home"
+    if suffixed in _AVAILABLE_SCHEMES:
+        return suffixed
+    return "posix_home"
+
+
+# Update these keys if the user sets a custom home.
+_HOME_KEYS = [
+    "installed_base",
+    "base",
+    "installed_platbase",
+    "platbase",
+    "prefix",
+    "exec_prefix",
+]
+if sysconfig.get_config_var("userbase") is not None:
+    _HOME_KEYS.append("userbase")
+
+
+def get_scheme(
+    dist_name: str,
+    user: bool = False,
+    home: typing.Optional[str] = None,
+    root: typing.Optional[str] = None,
+    isolated: bool = False,
+    prefix: typing.Optional[str] = None,
+) -> Scheme:
+    """
+    Get the "scheme" corresponding to the input parameters.
+
+    :param dist_name: the name of the package to retrieve the scheme for, used
+        in the headers scheme path
+    :param user: indicates to use the "user" scheme
+    :param home: indicates to use the "home" scheme
+    :param root: root under which other directories are re-based
+    :param isolated: ignored, but kept for distutils compatibility (where
+        this controls whether the user-site pydistutils.cfg is honored)
+    :param prefix: indicates to use the "prefix" scheme and provides the
+        base directory for the same
+    """
+    if user and prefix:
+        raise InvalidSchemeCombination("--user", "--prefix")
+    if home and prefix:
+        raise InvalidSchemeCombination("--home", "--prefix")
+
+    if home is not None:
+        scheme_name = _infer_home()
+    elif user:
+        scheme_name = _infer_user()
+    else:
+        scheme_name = _infer_prefix()
+
+    # Special case: When installing into a custom prefix, use posix_prefix
+    # instead of osx_framework_library. See _should_use_osx_framework_prefix()
+    # docstring for details.
+    if prefix is not None and scheme_name == "osx_framework_library":
+        scheme_name = "posix_prefix"
+
+    if home is not None:
+        variables = {k: home for k in _HOME_KEYS}
+    elif prefix is not None:
+        variables = {k: prefix for k in _HOME_KEYS}
+    else:
+        variables = {}
+
+    paths = sysconfig.get_paths(scheme=scheme_name, vars=variables)
+
+    # Logic here is very arbitrary, we're doing it for compatibility, don't ask.
+    # 1. Pip historically uses a special header path in virtual environments.
+    # 2. If the distribution name is not known, distutils uses 'UNKNOWN'. We
+    #    only do the same when not running in a virtual environment because
+    #    pip's historical header path logic (see point 1) did not do this.
+    if running_under_virtualenv():
+        if user:
+            base = variables.get("userbase", sys.prefix)
+        else:
+            base = variables.get("base", sys.prefix)
+        python_xy = f"python{get_major_minor_version()}"
+        paths["include"] = os.path.join(base, "include", "site", python_xy)
+    elif not dist_name:
+        dist_name = "UNKNOWN"
+
+    scheme = Scheme(
+        platlib=paths["platlib"],
+        purelib=paths["purelib"],
+        headers=os.path.join(paths["include"], dist_name),
+        scripts=paths["scripts"],
+        data=paths["data"],
+    )
+    if root is not None:
+        for key in SCHEME_KEYS:
+            value = change_root(root, getattr(scheme, key))
+            setattr(scheme, key, value)
+    return scheme
+
+
+def get_bin_prefix() -> str:
+    # Forcing to use /usr/local/bin for standard macOS framework installs.
+    if sys.platform[:6] == "darwin" and sys.prefix[:16] == "/System/Library/":
+        return "/usr/local/bin"
+    return sysconfig.get_paths()["scripts"]
+
+
+def get_purelib() -> str:
+    return sysconfig.get_paths()["purelib"]
+
+
+def get_platlib() -> str:
+    return sysconfig.get_paths()["platlib"]
+
+
+def get_prefixed_libs(prefix: str) -> typing.Tuple[str, str]:
+    paths = sysconfig.get_paths(vars={"base": prefix, "platbase": prefix})
+    return (paths["purelib"], paths["platlib"])
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/locations/base.py b/venv/lib/python3.9/site-packages/pip/_internal/locations/base.py
new file mode 100644
index 0000000..3f7de00
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/locations/base.py
@@ -0,0 +1,81 @@
+import functools
+import os
+import site
+import sys
+import sysconfig
+import typing
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils import appdirs
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+# Application Directories
+USER_CACHE_DIR = appdirs.user_cache_dir("pip")
+
+# FIXME doesn't account for venv linked to global site-packages
+site_packages: typing.Optional[str] = sysconfig.get_path("purelib")
+
+
+def get_major_minor_version() -> str:
+    """
+    Return the major-minor version of the current Python as a string, e.g.
+    "3.7" or "3.10".
+    """
+    return "{}.{}".format(*sys.version_info)
+
+
+def change_root(new_root: str, pathname: str) -> str:
+    """Return 'pathname' with 'new_root' prepended.
+
+    If 'pathname' is relative, this is equivalent to os.path.join(new_root, pathname).
+    Otherwise, it requires making 'pathname' relative and then joining the
+    two, which is tricky on DOS/Windows and Mac OS.
+
+    This is borrowed from Python's standard library's distutils module.
+    """
+    if os.name == "posix":
+        if not os.path.isabs(pathname):
+            return os.path.join(new_root, pathname)
+        else:
+            return os.path.join(new_root, pathname[1:])
+
+    elif os.name == "nt":
+        (drive, path) = os.path.splitdrive(pathname)
+        if path[0] == "\\":
+            path = path[1:]
+        return os.path.join(new_root, path)
+
+    else:
+        raise InstallationError(
+            f"Unknown platform: {os.name}\n"
+            "Can not change root path prefix on unknown platform."
+        )
+
+
+def get_src_prefix() -> str:
+    if running_under_virtualenv():
+        src_prefix = os.path.join(sys.prefix, "src")
+    else:
+        # FIXME: keep src in cwd for now (it is not a temporary folder)
+        try:
+            src_prefix = os.path.join(os.getcwd(), "src")
+        except OSError:
+            # In case the current working directory has been renamed or deleted
+            sys.exit("The folder you are executing pip from can no longer be found.")
+
+    # under macOS + virtualenv sys.prefix is not properly resolved
+    # it is something like /path/to/python/bin/..
+    return os.path.abspath(src_prefix)
+
+
+try:
+    # Use getusersitepackages if this is present, as it ensures that the
+    # value is initialised properly.
+    user_site: typing.Optional[str] = site.getusersitepackages()
+except AttributeError:
+    user_site = site.USER_SITE
+
+
+@functools.lru_cache(maxsize=None)
+def is_osx_framework() -> bool:
+    return bool(sysconfig.get_config_var("PYTHONFRAMEWORK"))
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/main.py b/venv/lib/python3.9/site-packages/pip/_internal/main.py
new file mode 100644
index 0000000..33c6d24
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/main.py
@@ -0,0 +1,12 @@
+from typing import List, Optional
+
+
+def main(args: Optional[List[str]] = None) -> int:
+    """This is preserved for old console scripts that may still be referencing
+    it.
+
+    For additional details, see https://github.com/pypa/pip/issues/7498.
+    """
+    from pip._internal.utils.entrypoints import _wrapper
+
+    return _wrapper(args)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__init__.py
new file mode 100644
index 0000000..9f73ca7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__init__.py
@@ -0,0 +1,127 @@
+import contextlib
+import functools
+import os
+import sys
+from typing import TYPE_CHECKING, List, Optional, Type, cast
+
+from pip._internal.utils.misc import strtobool
+
+from .base import BaseDistribution, BaseEnvironment, FilesystemWheel, MemoryWheel, Wheel
+
+if TYPE_CHECKING:
+    from typing import Protocol
+else:
+    Protocol = object
+
+__all__ = [
+    "BaseDistribution",
+    "BaseEnvironment",
+    "FilesystemWheel",
+    "MemoryWheel",
+    "Wheel",
+    "get_default_environment",
+    "get_environment",
+    "get_wheel_distribution",
+    "select_backend",
+]
+
+
+def _should_use_importlib_metadata() -> bool:
+    """Whether to use the ``importlib.metadata`` or ``pkg_resources`` backend.
+
+    By default, pip uses ``importlib.metadata`` on Python 3.11+, and
+    ``pkg_resourcess`` otherwise. This can be overridden by a couple of ways:
+
+    * If environment variable ``_PIP_USE_IMPORTLIB_METADATA`` is set, it
+      dictates whether ``importlib.metadata`` is used, regardless of Python
+      version.
+    * On Python 3.11+, Python distributors can patch ``importlib.metadata``
+      to add a global constant ``_PIP_USE_IMPORTLIB_METADATA = False``. This
+      makes pip use ``pkg_resources`` (unless the user set the aforementioned
+      environment variable to *True*).
+    """
+    with contextlib.suppress(KeyError, ValueError):
+        return bool(strtobool(os.environ["_PIP_USE_IMPORTLIB_METADATA"]))
+    if sys.version_info < (3, 11):
+        return False
+    import importlib.metadata
+
+    return bool(getattr(importlib.metadata, "_PIP_USE_IMPORTLIB_METADATA", True))
+
+
+class Backend(Protocol):
+    Distribution: Type[BaseDistribution]
+    Environment: Type[BaseEnvironment]
+
+
+@functools.lru_cache(maxsize=None)
+def select_backend() -> Backend:
+    if _should_use_importlib_metadata():
+        from . import importlib
+
+        return cast(Backend, importlib)
+    from . import pkg_resources
+
+    return cast(Backend, pkg_resources)
+
+
+def get_default_environment() -> BaseEnvironment:
+    """Get the default representation for the current environment.
+
+    This returns an Environment instance from the chosen backend. The default
+    Environment instance should be built from ``sys.path`` and may use caching
+    to share instance state accorss calls.
+    """
+    return select_backend().Environment.default()
+
+
+def get_environment(paths: Optional[List[str]]) -> BaseEnvironment:
+    """Get a representation of the environment specified by ``paths``.
+
+    This returns an Environment instance from the chosen backend based on the
+    given import paths. The backend must build a fresh instance representing
+    the state of installed distributions when this function is called.
+    """
+    return select_backend().Environment.from_paths(paths)
+
+
+def get_directory_distribution(directory: str) -> BaseDistribution:
+    """Get the distribution metadata representation in the specified directory.
+
+    This returns a Distribution instance from the chosen backend based on
+    the given on-disk ``.dist-info`` directory.
+    """
+    return select_backend().Distribution.from_directory(directory)
+
+
+def get_wheel_distribution(wheel: Wheel, canonical_name: str) -> BaseDistribution:
+    """Get the representation of the specified wheel's distribution metadata.
+
+    This returns a Distribution instance from the chosen backend based on
+    the given wheel's ``.dist-info`` directory.
+
+    :param canonical_name: Normalized project name of the given wheel.
+    """
+    return select_backend().Distribution.from_wheel(wheel, canonical_name)
+
+
+def get_metadata_distribution(
+    metadata_contents: bytes,
+    filename: str,
+    canonical_name: str,
+) -> BaseDistribution:
+    """Get the dist representation of the specified METADATA file contents.
+
+    This returns a Distribution instance from the chosen backend sourced from the data
+    in `metadata_contents`.
+
+    :param metadata_contents: Contents of a METADATA file within a dist, or one served
+                              via PEP 658.
+    :param filename: Filename for the dist this metadata represents.
+    :param canonical_name: Normalized project name of the given dist.
+    """
+    return select_backend().Distribution.from_metadata_file_contents(
+        metadata_contents,
+        filename,
+        canonical_name,
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..6fba955
--- /dev/null
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Binary files differ
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new file mode 100644
index 0000000..98cf1aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/_json.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/base.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/base.cpython-39.pyc
new file mode 100644
index 0000000..4460cf0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/base.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/pkg_resources.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/pkg_resources.cpython-39.pyc
new file mode 100644
index 0000000..de22ff1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/__pycache__/pkg_resources.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/_json.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/_json.py
new file mode 100644
index 0000000..336b52f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/_json.py
@@ -0,0 +1,84 @@
+# Extracted from https://github.com/pfmoore/pkg_metadata
+
+from email.header import Header, decode_header, make_header
+from email.message import Message
+from typing import Any, Dict, List, Union
+
+METADATA_FIELDS = [
+    # Name, Multiple-Use
+    ("Metadata-Version", False),
+    ("Name", False),
+    ("Version", False),
+    ("Dynamic", True),
+    ("Platform", True),
+    ("Supported-Platform", True),
+    ("Summary", False),
+    ("Description", False),
+    ("Description-Content-Type", False),
+    ("Keywords", False),
+    ("Home-page", False),
+    ("Download-URL", False),
+    ("Author", False),
+    ("Author-email", False),
+    ("Maintainer", False),
+    ("Maintainer-email", False),
+    ("License", False),
+    ("Classifier", True),
+    ("Requires-Dist", True),
+    ("Requires-Python", False),
+    ("Requires-External", True),
+    ("Project-URL", True),
+    ("Provides-Extra", True),
+    ("Provides-Dist", True),
+    ("Obsoletes-Dist", True),
+]
+
+
+def json_name(field: str) -> str:
+    return field.lower().replace("-", "_")
+
+
+def msg_to_json(msg: Message) -> Dict[str, Any]:
+    """Convert a Message object into a JSON-compatible dictionary."""
+
+    def sanitise_header(h: Union[Header, str]) -> str:
+        if isinstance(h, Header):
+            chunks = []
+            for bytes, encoding in decode_header(h):
+                if encoding == "unknown-8bit":
+                    try:
+                        # See if UTF-8 works
+                        bytes.decode("utf-8")
+                        encoding = "utf-8"
+                    except UnicodeDecodeError:
+                        # If not, latin1 at least won't fail
+                        encoding = "latin1"
+                chunks.append((bytes, encoding))
+            return str(make_header(chunks))
+        return str(h)
+
+    result = {}
+    for field, multi in METADATA_FIELDS:
+        if field not in msg:
+            continue
+        key = json_name(field)
+        if multi:
+            value: Union[str, List[str]] = [
+                sanitise_header(v) for v in msg.get_all(field)
+            ]
+        else:
+            value = sanitise_header(msg.get(field))
+            if key == "keywords":
+                # Accept both comma-separated and space-separated
+                # forms, for better compatibility with old data.
+                if "," in value:
+                    value = [v.strip() for v in value.split(",")]
+                else:
+                    value = value.split()
+        result[key] = value
+
+    payload = msg.get_payload()
+    if payload:
+        result["description"] = payload
+
+    return result
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/base.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/base.py
new file mode 100644
index 0000000..cafb79f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/base.py
@@ -0,0 +1,688 @@
+import csv
+import email.message
+import functools
+import json
+import logging
+import pathlib
+import re
+import zipfile
+from typing import (
+    IO,
+    TYPE_CHECKING,
+    Any,
+    Collection,
+    Container,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    NamedTuple,
+    Optional,
+    Tuple,
+    Union,
+)
+
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.specifiers import InvalidSpecifier, SpecifierSet
+from pip._vendor.packaging.utils import NormalizedName
+from pip._vendor.packaging.version import LegacyVersion, Version
+
+from pip._internal.exceptions import NoneMetadataError
+from pip._internal.locations import site_packages, user_site
+from pip._internal.models.direct_url import (
+    DIRECT_URL_METADATA_NAME,
+    DirectUrl,
+    DirectUrlValidationError,
+)
+from pip._internal.utils.compat import stdlib_pkgs  # TODO: Move definition here.
+from pip._internal.utils.egg_link import egg_link_path_from_sys_path
+from pip._internal.utils.misc import is_local, normalize_path
+from pip._internal.utils.packaging import safe_extra
+from pip._internal.utils.urls import url_to_path
+
+from ._json import msg_to_json
+
+if TYPE_CHECKING:
+    from typing import Protocol
+else:
+    Protocol = object
+
+DistributionVersion = Union[LegacyVersion, Version]
+
+InfoPath = Union[str, pathlib.PurePath]
+
+logger = logging.getLogger(__name__)
+
+
+class BaseEntryPoint(Protocol):
+    @property
+    def name(self) -> str:
+        raise NotImplementedError()
+
+    @property
+    def value(self) -> str:
+        raise NotImplementedError()
+
+    @property
+    def group(self) -> str:
+        raise NotImplementedError()
+
+
+def _convert_installed_files_path(
+    entry: Tuple[str, ...],
+    info: Tuple[str, ...],
+) -> str:
+    """Convert a legacy installed-files.txt path into modern RECORD path.
+
+    The legacy format stores paths relative to the info directory, while the
+    modern format stores paths relative to the package root, e.g. the
+    site-packages directory.
+
+    :param entry: Path parts of the installed-files.txt entry.
+    :param info: Path parts of the egg-info directory relative to package root.
+    :returns: The converted entry.
+
+    For best compatibility with symlinks, this does not use ``abspath()`` or
+    ``Path.resolve()``, but tries to work with path parts:
+
+    1. While ``entry`` starts with ``..``, remove the equal amounts of parts
+       from ``info``; if ``info`` is empty, start appending ``..`` instead.
+    2. Join the two directly.
+    """
+    while entry and entry[0] == "..":
+        if not info or info[-1] == "..":
+            info += ("..",)
+        else:
+            info = info[:-1]
+        entry = entry[1:]
+    return str(pathlib.Path(*info, *entry))
+
+
+class RequiresEntry(NamedTuple):
+    requirement: str
+    extra: str
+    marker: str
+
+
+class BaseDistribution(Protocol):
+    @classmethod
+    def from_directory(cls, directory: str) -> "BaseDistribution":
+        """Load the distribution from a metadata directory.
+
+        :param directory: Path to a metadata directory, e.g. ``.dist-info``.
+        """
+        raise NotImplementedError()
+
+    @classmethod
+    def from_metadata_file_contents(
+        cls,
+        metadata_contents: bytes,
+        filename: str,
+        project_name: str,
+    ) -> "BaseDistribution":
+        """Load the distribution from the contents of a METADATA file.
+
+        This is used to implement PEP 658 by generating a "shallow" dist object that can
+        be used for resolution without downloading or building the actual dist yet.
+
+        :param metadata_contents: The contents of a METADATA file.
+        :param filename: File name for the dist with this metadata.
+        :param project_name: Name of the project this dist represents.
+        """
+        raise NotImplementedError()
+
+    @classmethod
+    def from_wheel(cls, wheel: "Wheel", name: str) -> "BaseDistribution":
+        """Load the distribution from a given wheel.
+
+        :param wheel: A concrete wheel definition.
+        :param name: File name of the wheel.
+
+        :raises InvalidWheel: Whenever loading of the wheel causes a
+            :py:exc:`zipfile.BadZipFile` exception to be thrown.
+        :raises UnsupportedWheel: If the wheel is a valid zip, but malformed
+            internally.
+        """
+        raise NotImplementedError()
+
+    def __repr__(self) -> str:
+        return f"{self.raw_name} {self.version} ({self.location})"
+
+    def __str__(self) -> str:
+        return f"{self.raw_name} {self.version}"
+
+    @property
+    def location(self) -> Optional[str]:
+        """Where the distribution is loaded from.
+
+        A string value is not necessarily a filesystem path, since distributions
+        can be loaded from other sources, e.g. arbitrary zip archives. ``None``
+        means the distribution is created in-memory.
+
+        Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If
+        this is a symbolic link, we want to preserve the relative path between
+        it and files in the distribution.
+        """
+        raise NotImplementedError()
+
+    @property
+    def editable_project_location(self) -> Optional[str]:
+        """The project location for editable distributions.
+
+        This is the directory where pyproject.toml or setup.py is located.
+        None if the distribution is not installed in editable mode.
+        """
+        # TODO: this property is relatively costly to compute, memoize it ?
+        direct_url = self.direct_url
+        if direct_url:
+            if direct_url.is_local_editable():
+                return url_to_path(direct_url.url)
+        else:
+            # Search for an .egg-link file by walking sys.path, as it was
+            # done before by dist_is_editable().
+            egg_link_path = egg_link_path_from_sys_path(self.raw_name)
+            if egg_link_path:
+                # TODO: get project location from second line of egg_link file
+                #       (https://github.com/pypa/pip/issues/10243)
+                return self.location
+        return None
+
+    @property
+    def installed_location(self) -> Optional[str]:
+        """The distribution's "installed" location.
+
+        This should generally be a ``site-packages`` directory. This is
+        usually ``dist.location``, except for legacy develop-installed packages,
+        where ``dist.location`` is the source code location, and this is where
+        the ``.egg-link`` file is.
+
+        The returned location is normalized (in particular, with symlinks removed).
+        """
+        raise NotImplementedError()
+
+    @property
+    def info_location(self) -> Optional[str]:
+        """Location of the .[egg|dist]-info directory or file.
+
+        Similarly to ``location``, a string value is not necessarily a
+        filesystem path. ``None`` means the distribution is created in-memory.
+
+        For a modern .dist-info installation on disk, this should be something
+        like ``{location}/{raw_name}-{version}.dist-info``.
+
+        Do not canonicalize this value with e.g. ``pathlib.Path.resolve()``. If
+        this is a symbolic link, we want to preserve the relative path between
+        it and other files in the distribution.
+        """
+        raise NotImplementedError()
+
+    @property
+    def installed_by_distutils(self) -> bool:
+        """Whether this distribution is installed with legacy distutils format.
+
+        A distribution installed with "raw" distutils not patched by setuptools
+        uses one single file at ``info_location`` to store metadata. We need to
+        treat this specially on uninstallation.
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        return pathlib.Path(info_location).is_file()
+
+    @property
+    def installed_as_egg(self) -> bool:
+        """Whether this distribution is installed as an egg.
+
+        This usually indicates the distribution was installed by (older versions
+        of) easy_install.
+        """
+        location = self.location
+        if not location:
+            return False
+        return location.endswith(".egg")
+
+    @property
+    def installed_with_setuptools_egg_info(self) -> bool:
+        """Whether this distribution is installed with the ``.egg-info`` format.
+
+        This usually indicates the distribution was installed with setuptools
+        with an old pip version or with ``single-version-externally-managed``.
+
+        Note that this ensure the metadata store is a directory. distutils can
+        also installs an ``.egg-info``, but as a file, not a directory. This
+        property is *False* for that case. Also see ``installed_by_distutils``.
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        if not info_location.endswith(".egg-info"):
+            return False
+        return pathlib.Path(info_location).is_dir()
+
+    @property
+    def installed_with_dist_info(self) -> bool:
+        """Whether this distribution is installed with the "modern format".
+
+        This indicates a "modern" installation, e.g. storing metadata in the
+        ``.dist-info`` directory. This applies to installations made by
+        setuptools (but through pip, not directly), or anything using the
+        standardized build backend interface (PEP 517).
+        """
+        info_location = self.info_location
+        if not info_location:
+            return False
+        if not info_location.endswith(".dist-info"):
+            return False
+        return pathlib.Path(info_location).is_dir()
+
+    @property
+    def canonical_name(self) -> NormalizedName:
+        raise NotImplementedError()
+
+    @property
+    def version(self) -> DistributionVersion:
+        raise NotImplementedError()
+
+    @property
+    def setuptools_filename(self) -> str:
+        """Convert a project name to its setuptools-compatible filename.
+
+        This is a copy of ``pkg_resources.to_filename()`` for compatibility.
+        """
+        return self.raw_name.replace("-", "_")
+
+    @property
+    def direct_url(self) -> Optional[DirectUrl]:
+        """Obtain a DirectUrl from this distribution.
+
+        Returns None if the distribution has no `direct_url.json` metadata,
+        or if `direct_url.json` is invalid.
+        """
+        try:
+            content = self.read_text(DIRECT_URL_METADATA_NAME)
+        except FileNotFoundError:
+            return None
+        try:
+            return DirectUrl.from_json(content)
+        except (
+            UnicodeDecodeError,
+            json.JSONDecodeError,
+            DirectUrlValidationError,
+        ) as e:
+            logger.warning(
+                "Error parsing %s for %s: %s",
+                DIRECT_URL_METADATA_NAME,
+                self.canonical_name,
+                e,
+            )
+            return None
+
+    @property
+    def installer(self) -> str:
+        try:
+            installer_text = self.read_text("INSTALLER")
+        except (OSError, ValueError, NoneMetadataError):
+            return ""  # Fail silently if the installer file cannot be read.
+        for line in installer_text.splitlines():
+            cleaned_line = line.strip()
+            if cleaned_line:
+                return cleaned_line
+        return ""
+
+    @property
+    def requested(self) -> bool:
+        return self.is_file("REQUESTED")
+
+    @property
+    def editable(self) -> bool:
+        return bool(self.editable_project_location)
+
+    @property
+    def local(self) -> bool:
+        """If distribution is installed in the current virtual environment.
+
+        Always True if we're not in a virtualenv.
+        """
+        if self.installed_location is None:
+            return False
+        return is_local(self.installed_location)
+
+    @property
+    def in_usersite(self) -> bool:
+        if self.installed_location is None or user_site is None:
+            return False
+        return self.installed_location.startswith(normalize_path(user_site))
+
+    @property
+    def in_site_packages(self) -> bool:
+        if self.installed_location is None or site_packages is None:
+            return False
+        return self.installed_location.startswith(normalize_path(site_packages))
+
+    def is_file(self, path: InfoPath) -> bool:
+        """Check whether an entry in the info directory is a file."""
+        raise NotImplementedError()
+
+    def iter_distutils_script_names(self) -> Iterator[str]:
+        """Find distutils 'scripts' entries metadata.
+
+        If 'scripts' is supplied in ``setup.py``, distutils records those in the
+        installed distribution's ``scripts`` directory, a file for each script.
+        """
+        raise NotImplementedError()
+
+    def read_text(self, path: InfoPath) -> str:
+        """Read a file in the info directory.
+
+        :raise FileNotFoundError: If ``path`` does not exist in the directory.
+        :raise NoneMetadataError: If ``path`` exists in the info directory, but
+            cannot be read.
+        """
+        raise NotImplementedError()
+
+    def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
+        raise NotImplementedError()
+
+    def _metadata_impl(self) -> email.message.Message:
+        raise NotImplementedError()
+
+    @functools.lru_cache(maxsize=1)
+    def _metadata_cached(self) -> email.message.Message:
+        # When we drop python 3.7 support, move this to the metadata property and use
+        # functools.cached_property instead of lru_cache.
+        metadata = self._metadata_impl()
+        self._add_egg_info_requires(metadata)
+        return metadata
+
+    @property
+    def metadata(self) -> email.message.Message:
+        """Metadata of distribution parsed from e.g. METADATA or PKG-INFO.
+
+        This should return an empty message if the metadata file is unavailable.
+
+        :raises NoneMetadataError: If the metadata file is available, but does
+            not contain valid metadata.
+        """
+        return self._metadata_cached()
+
+    @property
+    def metadata_dict(self) -> Dict[str, Any]:
+        """PEP 566 compliant JSON-serializable representation of METADATA or PKG-INFO.
+
+        This should return an empty dict if the metadata file is unavailable.
+
+        :raises NoneMetadataError: If the metadata file is available, but does
+            not contain valid metadata.
+        """
+        return msg_to_json(self.metadata)
+
+    @property
+    def metadata_version(self) -> Optional[str]:
+        """Value of "Metadata-Version:" in distribution metadata, if available."""
+        return self.metadata.get("Metadata-Version")
+
+    @property
+    def raw_name(self) -> str:
+        """Value of "Name:" in distribution metadata."""
+        # The metadata should NEVER be missing the Name: key, but if it somehow
+        # does, fall back to the known canonical name.
+        return self.metadata.get("Name", self.canonical_name)
+
+    @property
+    def requires_python(self) -> SpecifierSet:
+        """Value of "Requires-Python:" in distribution metadata.
+
+        If the key does not exist or contains an invalid value, an empty
+        SpecifierSet should be returned.
+        """
+        value = self.metadata.get("Requires-Python")
+        if value is None:
+            return SpecifierSet()
+        try:
+            # Convert to str to satisfy the type checker; this can be a Header object.
+            spec = SpecifierSet(str(value))
+        except InvalidSpecifier as e:
+            message = "Package %r has an invalid Requires-Python: %s"
+            logger.warning(message, self.raw_name, e)
+            return SpecifierSet()
+        return spec
+
+    def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
+        """Dependencies of this distribution.
+
+        For modern .dist-info distributions, this is the collection of
+        "Requires-Dist:" entries in distribution metadata.
+        """
+        raise NotImplementedError()
+
+    def iter_provided_extras(self) -> Iterable[str]:
+        """Extras provided by this distribution.
+
+        For modern .dist-info distributions, this is the collection of
+        "Provides-Extra:" entries in distribution metadata.
+        """
+        raise NotImplementedError()
+
+    def _iter_declared_entries_from_record(self) -> Optional[Iterator[str]]:
+        try:
+            text = self.read_text("RECORD")
+        except FileNotFoundError:
+            return None
+        # This extra Path-str cast normalizes entries.
+        return (str(pathlib.Path(row[0])) for row in csv.reader(text.splitlines()))
+
+    def _iter_declared_entries_from_legacy(self) -> Optional[Iterator[str]]:
+        try:
+            text = self.read_text("installed-files.txt")
+        except FileNotFoundError:
+            return None
+        paths = (p for p in text.splitlines(keepends=False) if p)
+        root = self.location
+        info = self.info_location
+        if root is None or info is None:
+            return paths
+        try:
+            info_rel = pathlib.Path(info).relative_to(root)
+        except ValueError:  # info is not relative to root.
+            return paths
+        if not info_rel.parts:  # info *is* root.
+            return paths
+        return (
+            _convert_installed_files_path(pathlib.Path(p).parts, info_rel.parts)
+            for p in paths
+        )
+
+    def iter_declared_entries(self) -> Optional[Iterator[str]]:
+        """Iterate through file entries declared in this distribution.
+
+        For modern .dist-info distributions, this is the files listed in the
+        ``RECORD`` metadata file. For legacy setuptools distributions, this
+        comes from ``installed-files.txt``, with entries normalized to be
+        compatible with the format used by ``RECORD``.
+
+        :return: An iterator for listed entries, or None if the distribution
+            contains neither ``RECORD`` nor ``installed-files.txt``.
+        """
+        return (
+            self._iter_declared_entries_from_record()
+            or self._iter_declared_entries_from_legacy()
+        )
+
+    def _iter_requires_txt_entries(self) -> Iterator[RequiresEntry]:
+        """Parse a ``requires.txt`` in an egg-info directory.
+
+        This is an INI-ish format where an egg-info stores dependencies. A
+        section name describes extra other environment markers, while each entry
+        is an arbitrary string (not a key-value pair) representing a dependency
+        as a requirement string (no markers).
+
+        There is a construct in ``importlib.metadata`` called ``Sectioned`` that
+        does mostly the same, but the format is currently considered private.
+        """
+        try:
+            content = self.read_text("requires.txt")
+        except FileNotFoundError:
+            return
+        extra = marker = ""  # Section-less entries don't have markers.
+        for line in content.splitlines():
+            line = line.strip()
+            if not line or line.startswith("#"):  # Comment; ignored.
+                continue
+            if line.startswith("[") and line.endswith("]"):  # A section header.
+                extra, _, marker = line.strip("[]").partition(":")
+                continue
+            yield RequiresEntry(requirement=line, extra=extra, marker=marker)
+
+    def _iter_egg_info_extras(self) -> Iterable[str]:
+        """Get extras from the egg-info directory."""
+        known_extras = {""}
+        for entry in self._iter_requires_txt_entries():
+            if entry.extra in known_extras:
+                continue
+            known_extras.add(entry.extra)
+            yield entry.extra
+
+    def _iter_egg_info_dependencies(self) -> Iterable[str]:
+        """Get distribution dependencies from the egg-info directory.
+
+        To ease parsing, this converts a legacy dependency entry into a PEP 508
+        requirement string. Like ``_iter_requires_txt_entries()``, there is code
+        in ``importlib.metadata`` that does mostly the same, but not do exactly
+        what we need.
+
+        Namely, ``importlib.metadata`` does not normalize the extra name before
+        putting it into the requirement string, which causes marker comparison
+        to fail because the dist-info format do normalize. This is consistent in
+        all currently available PEP 517 backends, although not standardized.
+        """
+        for entry in self._iter_requires_txt_entries():
+            if entry.extra and entry.marker:
+                marker = f'({entry.marker}) and extra == "{safe_extra(entry.extra)}"'
+            elif entry.extra:
+                marker = f'extra == "{safe_extra(entry.extra)}"'
+            elif entry.marker:
+                marker = entry.marker
+            else:
+                marker = ""
+            if marker:
+                yield f"{entry.requirement} ; {marker}"
+            else:
+                yield entry.requirement
+
+    def _add_egg_info_requires(self, metadata: email.message.Message) -> None:
+        """Add egg-info requires.txt information to the metadata."""
+        if not metadata.get_all("Requires-Dist"):
+            for dep in self._iter_egg_info_dependencies():
+                metadata["Requires-Dist"] = dep
+        if not metadata.get_all("Provides-Extra"):
+            for extra in self._iter_egg_info_extras():
+                metadata["Provides-Extra"] = extra
+
+
+class BaseEnvironment:
+    """An environment containing distributions to introspect."""
+
+    @classmethod
+    def default(cls) -> "BaseEnvironment":
+        raise NotImplementedError()
+
+    @classmethod
+    def from_paths(cls, paths: Optional[List[str]]) -> "BaseEnvironment":
+        raise NotImplementedError()
+
+    def get_distribution(self, name: str) -> Optional["BaseDistribution"]:
+        """Given a requirement name, return the installed distributions.
+
+        The name may not be normalized. The implementation must canonicalize
+        it for lookup.
+        """
+        raise NotImplementedError()
+
+    def _iter_distributions(self) -> Iterator["BaseDistribution"]:
+        """Iterate through installed distributions.
+
+        This function should be implemented by subclass, but never called
+        directly. Use the public ``iter_distribution()`` instead, which
+        implements additional logic to make sure the distributions are valid.
+        """
+        raise NotImplementedError()
+
+    def iter_all_distributions(self) -> Iterator[BaseDistribution]:
+        """Iterate through all installed distributions without any filtering."""
+        for dist in self._iter_distributions():
+            # Make sure the distribution actually comes from a valid Python
+            # packaging distribution. Pip's AdjacentTempDirectory leaves folders
+            # e.g. ``~atplotlib.dist-info`` if cleanup was interrupted. The
+            # valid project name pattern is taken from PEP 508.
+            project_name_valid = re.match(
+                r"^([A-Z0-9]|[A-Z0-9][A-Z0-9._-]*[A-Z0-9])$",
+                dist.canonical_name,
+                flags=re.IGNORECASE,
+            )
+            if not project_name_valid:
+                logger.warning(
+                    "Ignoring invalid distribution %s (%s)",
+                    dist.canonical_name,
+                    dist.location,
+                )
+                continue
+            yield dist
+
+    def iter_installed_distributions(
+        self,
+        local_only: bool = True,
+        skip: Container[str] = stdlib_pkgs,
+        include_editables: bool = True,
+        editables_only: bool = False,
+        user_only: bool = False,
+    ) -> Iterator[BaseDistribution]:
+        """Return a list of installed distributions.
+
+        This is based on ``iter_all_distributions()`` with additional filtering
+        options. Note that ``iter_installed_distributions()`` without arguments
+        is *not* equal to ``iter_all_distributions()``, since some of the
+        configurations exclude packages by default.
+
+        :param local_only: If True (default), only return installations
+        local to the current virtualenv, if in a virtualenv.
+        :param skip: An iterable of canonicalized project names to ignore;
+            defaults to ``stdlib_pkgs``.
+        :param include_editables: If False, don't report editables.
+        :param editables_only: If True, only report editables.
+        :param user_only: If True, only report installations in the user
+        site directory.
+        """
+        it = self.iter_all_distributions()
+        if local_only:
+            it = (d for d in it if d.local)
+        if not include_editables:
+            it = (d for d in it if not d.editable)
+        if editables_only:
+            it = (d for d in it if d.editable)
+        if user_only:
+            it = (d for d in it if d.in_usersite)
+        return (d for d in it if d.canonical_name not in skip)
+
+
+class Wheel(Protocol):
+    location: str
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        raise NotImplementedError()
+
+
+class FilesystemWheel(Wheel):
+    def __init__(self, location: str) -> None:
+        self.location = location
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        return zipfile.ZipFile(self.location, allowZip64=True)
+
+
+class MemoryWheel(Wheel):
+    def __init__(self, location: str, stream: IO[bytes]) -> None:
+        self.location = location
+        self.stream = stream
+
+    def as_zipfile(self) -> zipfile.ZipFile:
+        return zipfile.ZipFile(self.stream, allowZip64=True)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__init__.py
new file mode 100644
index 0000000..5e7af9f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__init__.py
@@ -0,0 +1,4 @@
+from ._dists import Distribution
+from ._envs import Environment
+
+__all__ = ["Distribution", "Environment"]
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..1cd2dd2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_compat.cpython-39.pyc
new file mode 100644
index 0000000..7133b2d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_compat.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_dists.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_dists.cpython-39.pyc
new file mode 100644
index 0000000..4f409d8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_dists.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_envs.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_envs.cpython-39.pyc
new file mode 100644
index 0000000..be8bc21
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/__pycache__/_envs.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_compat.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_compat.py
new file mode 100644
index 0000000..593bff2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_compat.py
@@ -0,0 +1,55 @@
+import importlib.metadata
+from typing import Any, Optional, Protocol, cast
+
+
+class BadMetadata(ValueError):
+    def __init__(self, dist: importlib.metadata.Distribution, *, reason: str) -> None:
+        self.dist = dist
+        self.reason = reason
+
+    def __str__(self) -> str:
+        return f"Bad metadata in {self.dist} ({self.reason})"
+
+
+class BasePath(Protocol):
+    """A protocol that various path objects conform.
+
+    This exists because importlib.metadata uses both ``pathlib.Path`` and
+    ``zipfile.Path``, and we need a common base for type hints (Union does not
+    work well since ``zipfile.Path`` is too new for our linter setup).
+
+    This does not mean to be exhaustive, but only contains things that present
+    in both classes *that we need*.
+    """
+
+    @property
+    def name(self) -> str:
+        raise NotImplementedError()
+
+    @property
+    def parent(self) -> "BasePath":
+        raise NotImplementedError()
+
+
+def get_info_location(d: importlib.metadata.Distribution) -> Optional[BasePath]:
+    """Find the path to the distribution's metadata directory.
+
+    HACK: This relies on importlib.metadata's private ``_path`` attribute. Not
+    all distributions exist on disk, so importlib.metadata is correct to not
+    expose the attribute as public. But pip's code base is old and not as clean,
+    so we do this to avoid having to rewrite too many things. Hopefully we can
+    eliminate this some day.
+    """
+    return getattr(d, "_path", None)
+
+
+def get_dist_name(dist: importlib.metadata.Distribution) -> str:
+    """Get the distribution's project name.
+
+    The ``name`` attribute is only available in Python 3.10 or later. We are
+    targeting exactly that, but Mypy does not know this.
+    """
+    name = cast(Any, dist).name
+    if not isinstance(name, str):
+        raise BadMetadata(dist, reason="invalid metadata entry 'name'")
+    return name
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_dists.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_dists.py
new file mode 100644
index 0000000..65c043c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_dists.py
@@ -0,0 +1,224 @@
+import email.message
+import importlib.metadata
+import os
+import pathlib
+import zipfile
+from typing import (
+    Collection,
+    Dict,
+    Iterable,
+    Iterator,
+    Mapping,
+    Optional,
+    Sequence,
+    cast,
+)
+
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.exceptions import InvalidWheel, UnsupportedWheel
+from pip._internal.metadata.base import (
+    BaseDistribution,
+    BaseEntryPoint,
+    DistributionVersion,
+    InfoPath,
+    Wheel,
+)
+from pip._internal.utils.misc import normalize_path
+from pip._internal.utils.packaging import safe_extra
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file
+
+from ._compat import BasePath, get_dist_name
+
+
+class WheelDistribution(importlib.metadata.Distribution):
+    """An ``importlib.metadata.Distribution`` read from a wheel.
+
+    Although ``importlib.metadata.PathDistribution`` accepts ``zipfile.Path``,
+    its implementation is too "lazy" for pip's needs (we can't keep the ZipFile
+    handle open for the entire lifetime of the distribution object).
+
+    This implementation eagerly reads the entire metadata directory into the
+    memory instead, and operates from that.
+    """
+
+    def __init__(
+        self,
+        files: Mapping[pathlib.PurePosixPath, bytes],
+        info_location: pathlib.PurePosixPath,
+    ) -> None:
+        self._files = files
+        self.info_location = info_location
+
+    @classmethod
+    def from_zipfile(
+        cls,
+        zf: zipfile.ZipFile,
+        name: str,
+        location: str,
+    ) -> "WheelDistribution":
+        info_dir, _ = parse_wheel(zf, name)
+        paths = (
+            (name, pathlib.PurePosixPath(name.split("/", 1)[-1]))
+            for name in zf.namelist()
+            if name.startswith(f"{info_dir}/")
+        )
+        files = {
+            relpath: read_wheel_metadata_file(zf, fullpath)
+            for fullpath, relpath in paths
+        }
+        info_location = pathlib.PurePosixPath(location, info_dir)
+        return cls(files, info_location)
+
+    def iterdir(self, path: InfoPath) -> Iterator[pathlib.PurePosixPath]:
+        # Only allow iterating through the metadata directory.
+        if pathlib.PurePosixPath(str(path)) in self._files:
+            return iter(self._files)
+        raise FileNotFoundError(path)
+
+    def read_text(self, filename: str) -> Optional[str]:
+        try:
+            data = self._files[pathlib.PurePosixPath(filename)]
+        except KeyError:
+            return None
+        try:
+            text = data.decode("utf-8")
+        except UnicodeDecodeError as e:
+            wheel = self.info_location.parent
+            error = f"Error decoding metadata for {wheel}: {e} in {filename} file"
+            raise UnsupportedWheel(error)
+        return text
+
+
+class Distribution(BaseDistribution):
+    def __init__(
+        self,
+        dist: importlib.metadata.Distribution,
+        info_location: Optional[BasePath],
+        installed_location: Optional[BasePath],
+    ) -> None:
+        self._dist = dist
+        self._info_location = info_location
+        self._installed_location = installed_location
+
+    @classmethod
+    def from_directory(cls, directory: str) -> BaseDistribution:
+        info_location = pathlib.Path(directory)
+        dist = importlib.metadata.Distribution.at(info_location)
+        return cls(dist, info_location, info_location.parent)
+
+    @classmethod
+    def from_metadata_file_contents(
+        cls,
+        metadata_contents: bytes,
+        filename: str,
+        project_name: str,
+    ) -> BaseDistribution:
+        # Generate temp dir to contain the metadata file, and write the file contents.
+        temp_dir = pathlib.Path(
+            TempDirectory(kind="metadata", globally_managed=True).path
+        )
+        metadata_path = temp_dir / "METADATA"
+        metadata_path.write_bytes(metadata_contents)
+        # Construct dist pointing to the newly created directory.
+        dist = importlib.metadata.Distribution.at(metadata_path.parent)
+        return cls(dist, metadata_path.parent, None)
+
+    @classmethod
+    def from_wheel(cls, wheel: Wheel, name: str) -> BaseDistribution:
+        try:
+            with wheel.as_zipfile() as zf:
+                dist = WheelDistribution.from_zipfile(zf, name, wheel.location)
+        except zipfile.BadZipFile as e:
+            raise InvalidWheel(wheel.location, name) from e
+        except UnsupportedWheel as e:
+            raise UnsupportedWheel(f"{name} has an invalid wheel, {e}")
+        return cls(dist, dist.info_location, pathlib.PurePosixPath(wheel.location))
+
+    @property
+    def location(self) -> Optional[str]:
+        if self._info_location is None:
+            return None
+        return str(self._info_location.parent)
+
+    @property
+    def info_location(self) -> Optional[str]:
+        if self._info_location is None:
+            return None
+        return str(self._info_location)
+
+    @property
+    def installed_location(self) -> Optional[str]:
+        if self._installed_location is None:
+            return None
+        return normalize_path(str(self._installed_location))
+
+    def _get_dist_name_from_location(self) -> Optional[str]:
+        """Try to get the name from the metadata directory name.
+
+        This is much faster than reading metadata.
+        """
+        if self._info_location is None:
+            return None
+        stem, suffix = os.path.splitext(self._info_location.name)
+        if suffix not in (".dist-info", ".egg-info"):
+            return None
+        return stem.split("-", 1)[0]
+
+    @property
+    def canonical_name(self) -> NormalizedName:
+        name = self._get_dist_name_from_location() or get_dist_name(self._dist)
+        return canonicalize_name(name)
+
+    @property
+    def version(self) -> DistributionVersion:
+        return parse_version(self._dist.version)
+
+    def is_file(self, path: InfoPath) -> bool:
+        return self._dist.read_text(str(path)) is not None
+
+    def iter_distutils_script_names(self) -> Iterator[str]:
+        # A distutils installation is always "flat" (not in e.g. egg form), so
+        # if this distribution's info location is NOT a pathlib.Path (but e.g.
+        # zipfile.Path), it can never contain any distutils scripts.
+        if not isinstance(self._info_location, pathlib.Path):
+            return
+        for child in self._info_location.joinpath("scripts").iterdir():
+            yield child.name
+
+    def read_text(self, path: InfoPath) -> str:
+        content = self._dist.read_text(str(path))
+        if content is None:
+            raise FileNotFoundError(path)
+        return content
+
+    def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
+        # importlib.metadata's EntryPoint structure sasitfies BaseEntryPoint.
+        return self._dist.entry_points
+
+    def _metadata_impl(self) -> email.message.Message:
+        # From Python 3.10+, importlib.metadata declares PackageMetadata as the
+        # return type. This protocol is unfortunately a disaster now and misses
+        # a ton of fields that we need, including get() and get_payload(). We
+        # rely on the implementation that the object is actually a Message now,
+        # until upstream can improve the protocol. (python/cpython#94952)
+        return cast(email.message.Message, self._dist.metadata)
+
+    def iter_provided_extras(self) -> Iterable[str]:
+        return (
+            safe_extra(extra) for extra in self.metadata.get_all("Provides-Extra", [])
+        )
+
+    def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
+        contexts: Sequence[Dict[str, str]] = [{"extra": safe_extra(e)} for e in extras]
+        for req_string in self.metadata.get_all("Requires-Dist", []):
+            req = Requirement(req_string)
+            if not req.marker:
+                yield req
+            elif not extras and req.marker.evaluate({"extra": ""}):
+                yield req
+            elif any(req.marker.evaluate(context) for context in contexts):
+                yield req
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_envs.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_envs.py
new file mode 100644
index 0000000..cbec59e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/importlib/_envs.py
@@ -0,0 +1,188 @@
+import functools
+import importlib.metadata
+import logging
+import os
+import pathlib
+import sys
+import zipfile
+import zipimport
+from typing import Iterator, List, Optional, Sequence, Set, Tuple
+
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+
+from pip._internal.metadata.base import BaseDistribution, BaseEnvironment
+from pip._internal.models.wheel import Wheel
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.filetypes import WHEEL_EXTENSION
+
+from ._compat import BadMetadata, BasePath, get_dist_name, get_info_location
+from ._dists import Distribution
+
+logger = logging.getLogger(__name__)
+
+
+def _looks_like_wheel(location: str) -> bool:
+    if not location.endswith(WHEEL_EXTENSION):
+        return False
+    if not os.path.isfile(location):
+        return False
+    if not Wheel.wheel_file_re.match(os.path.basename(location)):
+        return False
+    return zipfile.is_zipfile(location)
+
+
+class _DistributionFinder:
+    """Finder to locate distributions.
+
+    The main purpose of this class is to memoize found distributions' names, so
+    only one distribution is returned for each package name. At lot of pip code
+    assumes this (because it is setuptools's behavior), and not doing the same
+    can potentially cause a distribution in lower precedence path to override a
+    higher precedence one if the caller is not careful.
+
+    Eventually we probably want to make it possible to see lower precedence
+    installations as well. It's useful feature, after all.
+    """
+
+    FoundResult = Tuple[importlib.metadata.Distribution, Optional[BasePath]]
+
+    def __init__(self) -> None:
+        self._found_names: Set[NormalizedName] = set()
+
+    def _find_impl(self, location: str) -> Iterator[FoundResult]:
+        """Find distributions in a location."""
+        # Skip looking inside a wheel. Since a package inside a wheel is not
+        # always valid (due to .data directories etc.), its .dist-info entry
+        # should not be considered an installed distribution.
+        if _looks_like_wheel(location):
+            return
+        # To know exactly where we find a distribution, we have to feed in the
+        # paths one by one, instead of dumping the list to importlib.metadata.
+        for dist in importlib.metadata.distributions(path=[location]):
+            info_location = get_info_location(dist)
+            try:
+                raw_name = get_dist_name(dist)
+            except BadMetadata as e:
+                logger.warning("Skipping %s due to %s", info_location, e.reason)
+                continue
+            normalized_name = canonicalize_name(raw_name)
+            if normalized_name in self._found_names:
+                continue
+            self._found_names.add(normalized_name)
+            yield dist, info_location
+
+    def find(self, location: str) -> Iterator[BaseDistribution]:
+        """Find distributions in a location.
+
+        The path can be either a directory, or a ZIP archive.
+        """
+        for dist, info_location in self._find_impl(location):
+            if info_location is None:
+                installed_location: Optional[BasePath] = None
+            else:
+                installed_location = info_location.parent
+            yield Distribution(dist, info_location, installed_location)
+
+    def find_linked(self, location: str) -> Iterator[BaseDistribution]:
+        """Read location in egg-link files and return distributions in there.
+
+        The path should be a directory; otherwise this returns nothing. This
+        follows how setuptools does this for compatibility. The first non-empty
+        line in the egg-link is read as a path (resolved against the egg-link's
+        containing directory if relative). Distributions found at that linked
+        location are returned.
+        """
+        path = pathlib.Path(location)
+        if not path.is_dir():
+            return
+        for child in path.iterdir():
+            if child.suffix != ".egg-link":
+                continue
+            with child.open() as f:
+                lines = (line.strip() for line in f)
+                target_rel = next((line for line in lines if line), "")
+            if not target_rel:
+                continue
+            target_location = str(path.joinpath(target_rel))
+            for dist, info_location in self._find_impl(target_location):
+                yield Distribution(dist, info_location, path)
+
+    def _find_eggs_in_dir(self, location: str) -> Iterator[BaseDistribution]:
+        from pip._vendor.pkg_resources import find_distributions
+
+        from pip._internal.metadata import pkg_resources as legacy
+
+        with os.scandir(location) as it:
+            for entry in it:
+                if not entry.name.endswith(".egg"):
+                    continue
+                for dist in find_distributions(entry.path):
+                    yield legacy.Distribution(dist)
+
+    def _find_eggs_in_zip(self, location: str) -> Iterator[BaseDistribution]:
+        from pip._vendor.pkg_resources import find_eggs_in_zip
+
+        from pip._internal.metadata import pkg_resources as legacy
+
+        try:
+            importer = zipimport.zipimporter(location)
+        except zipimport.ZipImportError:
+            return
+        for dist in find_eggs_in_zip(importer, location):
+            yield legacy.Distribution(dist)
+
+    def find_eggs(self, location: str) -> Iterator[BaseDistribution]:
+        """Find eggs in a location.
+
+        This actually uses the old *pkg_resources* backend. We likely want to
+        deprecate this so we can eventually remove the *pkg_resources*
+        dependency entirely. Before that, this should first emit a deprecation
+        warning for some versions when using the fallback since importing
+        *pkg_resources* is slow for those who don't need it.
+        """
+        if os.path.isdir(location):
+            yield from self._find_eggs_in_dir(location)
+        if zipfile.is_zipfile(location):
+            yield from self._find_eggs_in_zip(location)
+
+
+@functools.lru_cache(maxsize=None)  # Warn a distribution exactly once.
+def _emit_egg_deprecation(location: Optional[str]) -> None:
+    deprecated(
+        reason=f"Loading egg at {location} is deprecated.",
+        replacement="to use pip for package installation.",
+        gone_in=None,
+    )
+
+
+class Environment(BaseEnvironment):
+    def __init__(self, paths: Sequence[str]) -> None:
+        self._paths = paths
+
+    @classmethod
+    def default(cls) -> BaseEnvironment:
+        return cls(sys.path)
+
+    @classmethod
+    def from_paths(cls, paths: Optional[List[str]]) -> BaseEnvironment:
+        if paths is None:
+            return cls(sys.path)
+        return cls(paths)
+
+    def _iter_distributions(self) -> Iterator[BaseDistribution]:
+        finder = _DistributionFinder()
+        for location in self._paths:
+            yield from finder.find(location)
+            for dist in finder.find_eggs(location):
+                # _emit_egg_deprecation(dist.location)  # TODO: Enable this.
+                yield dist
+            # This must go last because that's how pkg_resources tie-breaks.
+            yield from finder.find_linked(location)
+
+    def get_distribution(self, name: str) -> Optional[BaseDistribution]:
+        matches = (
+            distribution
+            for distribution in self.iter_all_distributions()
+            if distribution.canonical_name == canonicalize_name(name)
+        )
+        return next(matches, None)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/metadata/pkg_resources.py b/venv/lib/python3.9/site-packages/pip/_internal/metadata/pkg_resources.py
new file mode 100644
index 0000000..f330ef1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/metadata/pkg_resources.py
@@ -0,0 +1,270 @@
+import email.message
+import email.parser
+import logging
+import os
+import zipfile
+from typing import Collection, Iterable, Iterator, List, Mapping, NamedTuple, Optional
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.exceptions import InvalidWheel, NoneMetadataError, UnsupportedWheel
+from pip._internal.utils.egg_link import egg_link_path_from_location
+from pip._internal.utils.misc import display_path, normalize_path
+from pip._internal.utils.wheel import parse_wheel, read_wheel_metadata_file
+
+from .base import (
+    BaseDistribution,
+    BaseEntryPoint,
+    BaseEnvironment,
+    DistributionVersion,
+    InfoPath,
+    Wheel,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class EntryPoint(NamedTuple):
+    name: str
+    value: str
+    group: str
+
+
+class InMemoryMetadata:
+    """IMetadataProvider that reads metadata files from a dictionary.
+
+    This also maps metadata decoding exceptions to our internal exception type.
+    """
+
+    def __init__(self, metadata: Mapping[str, bytes], wheel_name: str) -> None:
+        self._metadata = metadata
+        self._wheel_name = wheel_name
+
+    def has_metadata(self, name: str) -> bool:
+        return name in self._metadata
+
+    def get_metadata(self, name: str) -> str:
+        try:
+            return self._metadata[name].decode()
+        except UnicodeDecodeError as e:
+            # Augment the default error with the origin of the file.
+            raise UnsupportedWheel(
+                f"Error decoding metadata for {self._wheel_name}: {e} in {name} file"
+            )
+
+    def get_metadata_lines(self, name: str) -> Iterable[str]:
+        return pkg_resources.yield_lines(self.get_metadata(name))
+
+    def metadata_isdir(self, name: str) -> bool:
+        return False
+
+    def metadata_listdir(self, name: str) -> List[str]:
+        return []
+
+    def run_script(self, script_name: str, namespace: str) -> None:
+        pass
+
+
+class Distribution(BaseDistribution):
+    def __init__(self, dist: pkg_resources.Distribution) -> None:
+        self._dist = dist
+
+    @classmethod
+    def from_directory(cls, directory: str) -> BaseDistribution:
+        dist_dir = directory.rstrip(os.sep)
+
+        # Build a PathMetadata object, from path to metadata. :wink:
+        base_dir, dist_dir_name = os.path.split(dist_dir)
+        metadata = pkg_resources.PathMetadata(base_dir, dist_dir)
+
+        # Determine the correct Distribution object type.
+        if dist_dir.endswith(".egg-info"):
+            dist_cls = pkg_resources.Distribution
+            dist_name = os.path.splitext(dist_dir_name)[0]
+        else:
+            assert dist_dir.endswith(".dist-info")
+            dist_cls = pkg_resources.DistInfoDistribution
+            dist_name = os.path.splitext(dist_dir_name)[0].split("-")[0]
+
+        dist = dist_cls(base_dir, project_name=dist_name, metadata=metadata)
+        return cls(dist)
+
+    @classmethod
+    def from_metadata_file_contents(
+        cls,
+        metadata_contents: bytes,
+        filename: str,
+        project_name: str,
+    ) -> BaseDistribution:
+        metadata_dict = {
+            "METADATA": metadata_contents,
+        }
+        dist = pkg_resources.DistInfoDistribution(
+            location=filename,
+            metadata=InMemoryMetadata(metadata_dict, filename),
+            project_name=project_name,
+        )
+        return cls(dist)
+
+    @classmethod
+    def from_wheel(cls, wheel: Wheel, name: str) -> BaseDistribution:
+        try:
+            with wheel.as_zipfile() as zf:
+                info_dir, _ = parse_wheel(zf, name)
+                metadata_dict = {
+                    path.split("/", 1)[-1]: read_wheel_metadata_file(zf, path)
+                    for path in zf.namelist()
+                    if path.startswith(f"{info_dir}/")
+                }
+        except zipfile.BadZipFile as e:
+            raise InvalidWheel(wheel.location, name) from e
+        except UnsupportedWheel as e:
+            raise UnsupportedWheel(f"{name} has an invalid wheel, {e}")
+        dist = pkg_resources.DistInfoDistribution(
+            location=wheel.location,
+            metadata=InMemoryMetadata(metadata_dict, wheel.location),
+            project_name=name,
+        )
+        return cls(dist)
+
+    @property
+    def location(self) -> Optional[str]:
+        return self._dist.location
+
+    @property
+    def installed_location(self) -> Optional[str]:
+        egg_link = egg_link_path_from_location(self.raw_name)
+        if egg_link:
+            location = egg_link
+        elif self.location:
+            location = self.location
+        else:
+            return None
+        return normalize_path(location)
+
+    @property
+    def info_location(self) -> Optional[str]:
+        return self._dist.egg_info
+
+    @property
+    def installed_by_distutils(self) -> bool:
+        # A distutils-installed distribution is provided by FileMetadata. This
+        # provider has a "path" attribute not present anywhere else. Not the
+        # best introspection logic, but pip has been doing this for a long time.
+        try:
+            return bool(self._dist._provider.path)
+        except AttributeError:
+            return False
+
+    @property
+    def canonical_name(self) -> NormalizedName:
+        return canonicalize_name(self._dist.project_name)
+
+    @property
+    def version(self) -> DistributionVersion:
+        return parse_version(self._dist.version)
+
+    def is_file(self, path: InfoPath) -> bool:
+        return self._dist.has_metadata(str(path))
+
+    def iter_distutils_script_names(self) -> Iterator[str]:
+        yield from self._dist.metadata_listdir("scripts")
+
+    def read_text(self, path: InfoPath) -> str:
+        name = str(path)
+        if not self._dist.has_metadata(name):
+            raise FileNotFoundError(name)
+        content = self._dist.get_metadata(name)
+        if content is None:
+            raise NoneMetadataError(self, name)
+        return content
+
+    def iter_entry_points(self) -> Iterable[BaseEntryPoint]:
+        for group, entries in self._dist.get_entry_map().items():
+            for name, entry_point in entries.items():
+                name, _, value = str(entry_point).partition("=")
+                yield EntryPoint(name=name.strip(), value=value.strip(), group=group)
+
+    def _metadata_impl(self) -> email.message.Message:
+        """
+        :raises NoneMetadataError: if the distribution reports `has_metadata()`
+            True but `get_metadata()` returns None.
+        """
+        if isinstance(self._dist, pkg_resources.DistInfoDistribution):
+            metadata_name = "METADATA"
+        else:
+            metadata_name = "PKG-INFO"
+        try:
+            metadata = self.read_text(metadata_name)
+        except FileNotFoundError:
+            if self.location:
+                displaying_path = display_path(self.location)
+            else:
+                displaying_path = repr(self.location)
+            logger.warning("No metadata found in %s", displaying_path)
+            metadata = ""
+        feed_parser = email.parser.FeedParser()
+        feed_parser.feed(metadata)
+        return feed_parser.close()
+
+    def iter_dependencies(self, extras: Collection[str] = ()) -> Iterable[Requirement]:
+        if extras:  # pkg_resources raises on invalid extras, so we sanitize.
+            extras = frozenset(extras).intersection(self._dist.extras)
+        return self._dist.requires(extras)
+
+    def iter_provided_extras(self) -> Iterable[str]:
+        return self._dist.extras
+
+
+class Environment(BaseEnvironment):
+    def __init__(self, ws: pkg_resources.WorkingSet) -> None:
+        self._ws = ws
+
+    @classmethod
+    def default(cls) -> BaseEnvironment:
+        return cls(pkg_resources.working_set)
+
+    @classmethod
+    def from_paths(cls, paths: Optional[List[str]]) -> BaseEnvironment:
+        return cls(pkg_resources.WorkingSet(paths))
+
+    def _iter_distributions(self) -> Iterator[BaseDistribution]:
+        for dist in self._ws:
+            yield Distribution(dist)
+
+    def _search_distribution(self, name: str) -> Optional[BaseDistribution]:
+        """Find a distribution matching the ``name`` in the environment.
+
+        This searches from *all* distributions available in the environment, to
+        match the behavior of ``pkg_resources.get_distribution()``.
+        """
+        canonical_name = canonicalize_name(name)
+        for dist in self.iter_all_distributions():
+            if dist.canonical_name == canonical_name:
+                return dist
+        return None
+
+    def get_distribution(self, name: str) -> Optional[BaseDistribution]:
+        # Search the distribution by looking through the working set.
+        dist = self._search_distribution(name)
+        if dist:
+            return dist
+
+        # If distribution could not be found, call working_set.require to
+        # update the working set, and try to find the distribution again.
+        # This might happen for e.g. when you install a package twice, once
+        # using setup.py develop and again using setup.py install. Now when
+        # running pip uninstall twice, the package gets removed from the
+        # working set in the first uninstall, so we have to populate the
+        # working set again so that pip knows about it and the packages gets
+        # picked up and is successfully uninstalled the second time too.
+        try:
+            # We didn't pass in any version specifiers, so this can never
+            # raise pkg_resources.VersionConflict.
+            self._ws.require(name)
+        except pkg_resources.DistributionNotFound:
+            return None
+        return self._search_distribution(name)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/models/__init__.py
new file mode 100644
index 0000000..7855226
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/__init__.py
@@ -0,0 +1,2 @@
+"""A package that contains models that represent entities.
+"""
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/direct_url.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/direct_url.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/link.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/link.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/scheme.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/scheme.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-39.pyc
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/search_scope.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/selection_prefs.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/selection_prefs.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/target_python.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/target_python.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/wheel.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/wheel.cpython-39.pyc
new file mode 100644
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--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/__pycache__/wheel.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/candidate.py b/venv/lib/python3.9/site-packages/pip/_internal/models/candidate.py
new file mode 100644
index 0000000..a4963ae
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/candidate.py
@@ -0,0 +1,34 @@
+from pip._vendor.packaging.version import parse as parse_version
+
+from pip._internal.models.link import Link
+from pip._internal.utils.models import KeyBasedCompareMixin
+
+
+class InstallationCandidate(KeyBasedCompareMixin):
+    """Represents a potential "candidate" for installation."""
+
+    __slots__ = ["name", "version", "link"]
+
+    def __init__(self, name: str, version: str, link: Link) -> None:
+        self.name = name
+        self.version = parse_version(version)
+        self.link = link
+
+        super().__init__(
+            key=(self.name, self.version, self.link),
+            defining_class=InstallationCandidate,
+        )
+
+    def __repr__(self) -> str:
+        return "<InstallationCandidate({!r}, {!r}, {!r})>".format(
+            self.name,
+            self.version,
+            self.link,
+        )
+
+    def __str__(self) -> str:
+        return "{!r} candidate (version {} at {})".format(
+            self.name,
+            self.version,
+            self.link,
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/direct_url.py b/venv/lib/python3.9/site-packages/pip/_internal/models/direct_url.py
new file mode 100644
index 0000000..e75feda
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/direct_url.py
@@ -0,0 +1,212 @@
+""" PEP 610 """
+import json
+import re
+import urllib.parse
+from typing import Any, Dict, Iterable, Optional, Type, TypeVar, Union
+
+__all__ = [
+    "DirectUrl",
+    "DirectUrlValidationError",
+    "DirInfo",
+    "ArchiveInfo",
+    "VcsInfo",
+]
+
+T = TypeVar("T")
+
+DIRECT_URL_METADATA_NAME = "direct_url.json"
+ENV_VAR_RE = re.compile(r"^\$\{[A-Za-z0-9-_]+\}(:\$\{[A-Za-z0-9-_]+\})?$")
+
+
+class DirectUrlValidationError(Exception):
+    pass
+
+
+def _get(
+    d: Dict[str, Any], expected_type: Type[T], key: str, default: Optional[T] = None
+) -> Optional[T]:
+    """Get value from dictionary and verify expected type."""
+    if key not in d:
+        return default
+    value = d[key]
+    if not isinstance(value, expected_type):
+        raise DirectUrlValidationError(
+            "{!r} has unexpected type for {} (expected {})".format(
+                value, key, expected_type
+            )
+        )
+    return value
+
+
+def _get_required(
+    d: Dict[str, Any], expected_type: Type[T], key: str, default: Optional[T] = None
+) -> T:
+    value = _get(d, expected_type, key, default)
+    if value is None:
+        raise DirectUrlValidationError(f"{key} must have a value")
+    return value
+
+
+def _exactly_one_of(infos: Iterable[Optional["InfoType"]]) -> "InfoType":
+    infos = [info for info in infos if info is not None]
+    if not infos:
+        raise DirectUrlValidationError(
+            "missing one of archive_info, dir_info, vcs_info"
+        )
+    if len(infos) > 1:
+        raise DirectUrlValidationError(
+            "more than one of archive_info, dir_info, vcs_info"
+        )
+    assert infos[0] is not None
+    return infos[0]
+
+
+def _filter_none(**kwargs: Any) -> Dict[str, Any]:
+    """Make dict excluding None values."""
+    return {k: v for k, v in kwargs.items() if v is not None}
+
+
+class VcsInfo:
+    name = "vcs_info"
+
+    def __init__(
+        self,
+        vcs: str,
+        commit_id: str,
+        requested_revision: Optional[str] = None,
+    ) -> None:
+        self.vcs = vcs
+        self.requested_revision = requested_revision
+        self.commit_id = commit_id
+
+    @classmethod
+    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["VcsInfo"]:
+        if d is None:
+            return None
+        return cls(
+            vcs=_get_required(d, str, "vcs"),
+            commit_id=_get_required(d, str, "commit_id"),
+            requested_revision=_get(d, str, "requested_revision"),
+        )
+
+    def _to_dict(self) -> Dict[str, Any]:
+        return _filter_none(
+            vcs=self.vcs,
+            requested_revision=self.requested_revision,
+            commit_id=self.commit_id,
+        )
+
+
+class ArchiveInfo:
+    name = "archive_info"
+
+    def __init__(
+        self,
+        hash: Optional[str] = None,
+    ) -> None:
+        self.hash = hash
+
+    @classmethod
+    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["ArchiveInfo"]:
+        if d is None:
+            return None
+        return cls(hash=_get(d, str, "hash"))
+
+    def _to_dict(self) -> Dict[str, Any]:
+        return _filter_none(hash=self.hash)
+
+
+class DirInfo:
+    name = "dir_info"
+
+    def __init__(
+        self,
+        editable: bool = False,
+    ) -> None:
+        self.editable = editable
+
+    @classmethod
+    def _from_dict(cls, d: Optional[Dict[str, Any]]) -> Optional["DirInfo"]:
+        if d is None:
+            return None
+        return cls(editable=_get_required(d, bool, "editable", default=False))
+
+    def _to_dict(self) -> Dict[str, Any]:
+        return _filter_none(editable=self.editable or None)
+
+
+InfoType = Union[ArchiveInfo, DirInfo, VcsInfo]
+
+
+class DirectUrl:
+    def __init__(
+        self,
+        url: str,
+        info: InfoType,
+        subdirectory: Optional[str] = None,
+    ) -> None:
+        self.url = url
+        self.info = info
+        self.subdirectory = subdirectory
+
+    def _remove_auth_from_netloc(self, netloc: str) -> str:
+        if "@" not in netloc:
+            return netloc
+        user_pass, netloc_no_user_pass = netloc.split("@", 1)
+        if (
+            isinstance(self.info, VcsInfo)
+            and self.info.vcs == "git"
+            and user_pass == "git"
+        ):
+            return netloc
+        if ENV_VAR_RE.match(user_pass):
+            return netloc
+        return netloc_no_user_pass
+
+    @property
+    def redacted_url(self) -> str:
+        """url with user:password part removed unless it is formed with
+        environment variables as specified in PEP 610, or it is ``git``
+        in the case of a git URL.
+        """
+        purl = urllib.parse.urlsplit(self.url)
+        netloc = self._remove_auth_from_netloc(purl.netloc)
+        surl = urllib.parse.urlunsplit(
+            (purl.scheme, netloc, purl.path, purl.query, purl.fragment)
+        )
+        return surl
+
+    def validate(self) -> None:
+        self.from_dict(self.to_dict())
+
+    @classmethod
+    def from_dict(cls, d: Dict[str, Any]) -> "DirectUrl":
+        return DirectUrl(
+            url=_get_required(d, str, "url"),
+            subdirectory=_get(d, str, "subdirectory"),
+            info=_exactly_one_of(
+                [
+                    ArchiveInfo._from_dict(_get(d, dict, "archive_info")),
+                    DirInfo._from_dict(_get(d, dict, "dir_info")),
+                    VcsInfo._from_dict(_get(d, dict, "vcs_info")),
+                ]
+            ),
+        )
+
+    def to_dict(self) -> Dict[str, Any]:
+        res = _filter_none(
+            url=self.redacted_url,
+            subdirectory=self.subdirectory,
+        )
+        res[self.info.name] = self.info._to_dict()
+        return res
+
+    @classmethod
+    def from_json(cls, s: str) -> "DirectUrl":
+        return cls.from_dict(json.loads(s))
+
+    def to_json(self) -> str:
+        return json.dumps(self.to_dict(), sort_keys=True)
+
+    def is_local_editable(self) -> bool:
+        return isinstance(self.info, DirInfo) and self.info.editable
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/format_control.py b/venv/lib/python3.9/site-packages/pip/_internal/models/format_control.py
new file mode 100644
index 0000000..db3995e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/format_control.py
@@ -0,0 +1,80 @@
+from typing import FrozenSet, Optional, Set
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import CommandError
+
+
+class FormatControl:
+    """Helper for managing formats from which a package can be installed."""
+
+    __slots__ = ["no_binary", "only_binary"]
+
+    def __init__(
+        self,
+        no_binary: Optional[Set[str]] = None,
+        only_binary: Optional[Set[str]] = None,
+    ) -> None:
+        if no_binary is None:
+            no_binary = set()
+        if only_binary is None:
+            only_binary = set()
+
+        self.no_binary = no_binary
+        self.only_binary = only_binary
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, self.__class__):
+            return NotImplemented
+
+        if self.__slots__ != other.__slots__:
+            return False
+
+        return all(getattr(self, k) == getattr(other, k) for k in self.__slots__)
+
+    def __repr__(self) -> str:
+        return "{}({}, {})".format(
+            self.__class__.__name__, self.no_binary, self.only_binary
+        )
+
+    @staticmethod
+    def handle_mutual_excludes(value: str, target: Set[str], other: Set[str]) -> None:
+        if value.startswith("-"):
+            raise CommandError(
+                "--no-binary / --only-binary option requires 1 argument."
+            )
+        new = value.split(",")
+        while ":all:" in new:
+            other.clear()
+            target.clear()
+            target.add(":all:")
+            del new[: new.index(":all:") + 1]
+            # Without a none, we want to discard everything as :all: covers it
+            if ":none:" not in new:
+                return
+        for name in new:
+            if name == ":none:":
+                target.clear()
+                continue
+            name = canonicalize_name(name)
+            other.discard(name)
+            target.add(name)
+
+    def get_allowed_formats(self, canonical_name: str) -> FrozenSet[str]:
+        result = {"binary", "source"}
+        if canonical_name in self.only_binary:
+            result.discard("source")
+        elif canonical_name in self.no_binary:
+            result.discard("binary")
+        elif ":all:" in self.only_binary:
+            result.discard("source")
+        elif ":all:" in self.no_binary:
+            result.discard("binary")
+        return frozenset(result)
+
+    def disallow_binaries(self) -> None:
+        self.handle_mutual_excludes(
+            ":all:",
+            self.no_binary,
+            self.only_binary,
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/index.py b/venv/lib/python3.9/site-packages/pip/_internal/models/index.py
new file mode 100644
index 0000000..b94c325
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/index.py
@@ -0,0 +1,28 @@
+import urllib.parse
+
+
+class PackageIndex:
+    """Represents a Package Index and provides easier access to endpoints"""
+
+    __slots__ = ["url", "netloc", "simple_url", "pypi_url", "file_storage_domain"]
+
+    def __init__(self, url: str, file_storage_domain: str) -> None:
+        super().__init__()
+        self.url = url
+        self.netloc = urllib.parse.urlsplit(url).netloc
+        self.simple_url = self._url_for_path("simple")
+        self.pypi_url = self._url_for_path("pypi")
+
+        # This is part of a temporary hack used to block installs of PyPI
+        # packages which depend on external urls only necessary until PyPI can
+        # block such packages themselves
+        self.file_storage_domain = file_storage_domain
+
+    def _url_for_path(self, path: str) -> str:
+        return urllib.parse.urljoin(self.url, path)
+
+
+PyPI = PackageIndex("https://pypi.org/", file_storage_domain="files.pythonhosted.org")
+TestPyPI = PackageIndex(
+    "https://test.pypi.org/", file_storage_domain="test-files.pythonhosted.org"
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/installation_report.py b/venv/lib/python3.9/site-packages/pip/_internal/models/installation_report.py
new file mode 100644
index 0000000..965f095
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/installation_report.py
@@ -0,0 +1,53 @@
+from typing import Any, Dict, Sequence
+
+from pip._vendor.packaging.markers import default_environment
+
+from pip import __version__
+from pip._internal.req.req_install import InstallRequirement
+
+
+class InstallationReport:
+    def __init__(self, install_requirements: Sequence[InstallRequirement]):
+        self._install_requirements = install_requirements
+
+    @classmethod
+    def _install_req_to_dict(cls, ireq: InstallRequirement) -> Dict[str, Any]:
+        assert ireq.download_info, f"No download_info for {ireq}"
+        res = {
+            # PEP 610 json for the download URL. download_info.archive_info.hash may
+            # be absent when the requirement was installed from the wheel cache
+            # and the cache entry was populated by an older pip version that did not
+            # record origin.json.
+            "download_info": ireq.download_info.to_dict(),
+            # is_direct is true if the requirement was a direct URL reference (which
+            # includes editable requirements), and false if the requirement was
+            # downloaded from a PEP 503 index or --find-links.
+            "is_direct": bool(ireq.original_link),
+            # requested is true if the requirement was specified by the user (aka
+            # top level requirement), and false if it was installed as a dependency of a
+            # requirement. https://peps.python.org/pep-0376/#requested
+            "requested": ireq.user_supplied,
+            # PEP 566 json encoding for metadata
+            # https://www.python.org/dev/peps/pep-0566/#json-compatible-metadata
+            "metadata": ireq.get_dist().metadata_dict,
+        }
+        if ireq.user_supplied and ireq.extras:
+            # For top level requirements, the list of requested extras, if any.
+            res["requested_extras"] = list(sorted(ireq.extras))
+        return res
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "version": "0",
+            "pip_version": __version__,
+            "install": [
+                self._install_req_to_dict(ireq) for ireq in self._install_requirements
+            ],
+            # https://peps.python.org/pep-0508/#environment-markers
+            # TODO: currently, the resolver uses the default environment to evaluate
+            # environment markers, so that is what we report here. In the future, it
+            # should also take into account options such as --python-version or
+            # --platform, perhaps under the form of an environment_override field?
+            # https://github.com/pypa/pip/issues/11198
+            "environment": default_environment(),
+        }
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/link.py b/venv/lib/python3.9/site-packages/pip/_internal/models/link.py
new file mode 100644
index 0000000..c792d12
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/link.py
@@ -0,0 +1,507 @@
+import functools
+import itertools
+import logging
+import os
+import posixpath
+import re
+import urllib.parse
+from dataclasses import dataclass
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    List,
+    Mapping,
+    NamedTuple,
+    Optional,
+    Tuple,
+    Union,
+)
+
+from pip._internal.utils.filetypes import WHEEL_EXTENSION
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.misc import (
+    pairwise,
+    redact_auth_from_url,
+    split_auth_from_netloc,
+    splitext,
+)
+from pip._internal.utils.models import KeyBasedCompareMixin
+from pip._internal.utils.urls import path_to_url, url_to_path
+
+if TYPE_CHECKING:
+    from pip._internal.index.collector import IndexContent
+
+logger = logging.getLogger(__name__)
+
+
+# Order matters, earlier hashes have a precedence over later hashes for what
+# we will pick to use.
+_SUPPORTED_HASHES = ("sha512", "sha384", "sha256", "sha224", "sha1", "md5")
+
+
+@dataclass(frozen=True)
+class LinkHash:
+    """Links to content may have embedded hash values. This class parses those.
+
+    `name` must be any member of `_SUPPORTED_HASHES`.
+
+    This class can be converted to and from `ArchiveInfo`. While ArchiveInfo intends to
+    be JSON-serializable to conform to PEP 610, this class contains the logic for
+    parsing a hash name and value for correctness, and then checking whether that hash
+    conforms to a schema with `.is_hash_allowed()`."""
+
+    name: str
+    value: str
+
+    _hash_re = re.compile(
+        # NB: we do not validate that the second group (.*) is a valid hex
+        # digest. Instead, we simply keep that string in this class, and then check it
+        # against Hashes when hash-checking is needed. This is easier to debug than
+        # proactively discarding an invalid hex digest, as we handle incorrect hashes
+        # and malformed hashes in the same place.
+        r"({choices})=(.*)".format(
+            choices="|".join(re.escape(hash_name) for hash_name in _SUPPORTED_HASHES)
+        ),
+    )
+
+    def __post_init__(self) -> None:
+        assert self._hash_re.match(f"{self.name}={self.value}")
+
+    @classmethod
+    @functools.lru_cache(maxsize=None)
+    def split_hash_name_and_value(cls, url: str) -> Optional["LinkHash"]:
+        """Search a string for a checksum algorithm name and encoded output value."""
+        match = cls._hash_re.search(url)
+        if match is None:
+            return None
+        name, value = match.groups()
+        return cls(name=name, value=value)
+
+    def as_hashes(self) -> Hashes:
+        """Return a Hashes instance which checks only for the current hash."""
+        return Hashes({self.name: [self.value]})
+
+    def is_hash_allowed(self, hashes: Optional[Hashes]) -> bool:
+        """
+        Return True if the current hash is allowed by `hashes`.
+        """
+        if hashes is None:
+            return False
+        return hashes.is_hash_allowed(self.name, hex_digest=self.value)
+
+
+def _clean_url_path_part(part: str) -> str:
+    """
+    Clean a "part" of a URL path (i.e. after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    return urllib.parse.quote(urllib.parse.unquote(part))
+
+
+def _clean_file_url_path(part: str) -> str:
+    """
+    Clean the first part of a URL path that corresponds to a local
+    filesystem path (i.e. the first part after splitting on "@" characters).
+    """
+    # We unquote prior to quoting to make sure nothing is double quoted.
+    # Also, on Windows the path part might contain a drive letter which
+    # should not be quoted. On Linux where drive letters do not
+    # exist, the colon should be quoted. We rely on urllib.request
+    # to do the right thing here.
+    return urllib.request.pathname2url(urllib.request.url2pathname(part))
+
+
+# percent-encoded:                   /
+_reserved_chars_re = re.compile("(@|%2F)", re.IGNORECASE)
+
+
+def _clean_url_path(path: str, is_local_path: bool) -> str:
+    """
+    Clean the path portion of a URL.
+    """
+    if is_local_path:
+        clean_func = _clean_file_url_path
+    else:
+        clean_func = _clean_url_path_part
+
+    # Split on the reserved characters prior to cleaning so that
+    # revision strings in VCS URLs are properly preserved.
+    parts = _reserved_chars_re.split(path)
+
+    cleaned_parts = []
+    for to_clean, reserved in pairwise(itertools.chain(parts, [""])):
+        cleaned_parts.append(clean_func(to_clean))
+        # Normalize %xx escapes (e.g. %2f -> %2F)
+        cleaned_parts.append(reserved.upper())
+
+    return "".join(cleaned_parts)
+
+
+def _ensure_quoted_url(url: str) -> str:
+    """
+    Make sure a link is fully quoted.
+    For example, if ' ' occurs in the URL, it will be replaced with "%20",
+    and without double-quoting other characters.
+    """
+    # Split the URL into parts according to the general structure
+    # `scheme://netloc/path;parameters?query#fragment`.
+    result = urllib.parse.urlparse(url)
+    # If the netloc is empty, then the URL refers to a local filesystem path.
+    is_local_path = not result.netloc
+    path = _clean_url_path(result.path, is_local_path=is_local_path)
+    return urllib.parse.urlunparse(result._replace(path=path))
+
+
+class Link(KeyBasedCompareMixin):
+    """Represents a parsed link from a Package Index's simple URL"""
+
+    __slots__ = [
+        "_parsed_url",
+        "_url",
+        "_hashes",
+        "comes_from",
+        "requires_python",
+        "yanked_reason",
+        "dist_info_metadata",
+        "link_hash",
+        "cache_link_parsing",
+    ]
+
+    def __init__(
+        self,
+        url: str,
+        comes_from: Optional[Union[str, "IndexContent"]] = None,
+        requires_python: Optional[str] = None,
+        yanked_reason: Optional[str] = None,
+        dist_info_metadata: Optional[str] = None,
+        link_hash: Optional[LinkHash] = None,
+        cache_link_parsing: bool = True,
+        hashes: Optional[Mapping[str, str]] = None,
+    ) -> None:
+        """
+        :param url: url of the resource pointed to (href of the link)
+        :param comes_from: instance of IndexContent where the link was found,
+            or string.
+        :param requires_python: String containing the `Requires-Python`
+            metadata field, specified in PEP 345. This may be specified by
+            a data-requires-python attribute in the HTML link tag, as
+            described in PEP 503.
+        :param yanked_reason: the reason the file has been yanked, if the
+            file has been yanked, or None if the file hasn't been yanked.
+            This is the value of the "data-yanked" attribute, if present, in
+            a simple repository HTML link. If the file has been yanked but
+            no reason was provided, this should be the empty string. See
+            PEP 592 for more information and the specification.
+        :param dist_info_metadata: the metadata attached to the file, or None if no such
+            metadata is provided. This is the value of the "data-dist-info-metadata"
+            attribute, if present, in a simple repository HTML link. This may be parsed
+            into its own `Link` by `self.metadata_link()`. See PEP 658 for more
+            information and the specification.
+        :param link_hash: a checksum for the content the link points to. If not
+            provided, this will be extracted from the link URL, if the URL has
+            any checksum.
+        :param cache_link_parsing: A flag that is used elsewhere to determine
+                                   whether resources retrieved from this link
+                                   should be cached. PyPI index urls should
+                                   generally have this set to False, for
+                                   example.
+        :param hashes: A mapping of hash names to digests to allow us to
+                       determine the validity of a download.
+        """
+
+        # url can be a UNC windows share
+        if url.startswith("\\\\"):
+            url = path_to_url(url)
+
+        self._parsed_url = urllib.parse.urlsplit(url)
+        # Store the url as a private attribute to prevent accidentally
+        # trying to set a new value.
+        self._url = url
+        self._hashes = hashes if hashes is not None else {}
+
+        self.comes_from = comes_from
+        self.requires_python = requires_python if requires_python else None
+        self.yanked_reason = yanked_reason
+        self.dist_info_metadata = dist_info_metadata
+        self.link_hash = link_hash or LinkHash.split_hash_name_and_value(self._url)
+
+        super().__init__(key=url, defining_class=Link)
+
+        self.cache_link_parsing = cache_link_parsing
+
+    @classmethod
+    def from_json(
+        cls,
+        file_data: Dict[str, Any],
+        page_url: str,
+    ) -> Optional["Link"]:
+        """
+        Convert an pypi json document from a simple repository page into a Link.
+        """
+        file_url = file_data.get("url")
+        if file_url is None:
+            return None
+
+        url = _ensure_quoted_url(urllib.parse.urljoin(page_url, file_url))
+        pyrequire = file_data.get("requires-python")
+        yanked_reason = file_data.get("yanked")
+        dist_info_metadata = file_data.get("dist-info-metadata")
+        hashes = file_data.get("hashes", {})
+
+        # The Link.yanked_reason expects an empty string instead of a boolean.
+        if yanked_reason and not isinstance(yanked_reason, str):
+            yanked_reason = ""
+        # The Link.yanked_reason expects None instead of False.
+        elif not yanked_reason:
+            yanked_reason = None
+
+        return cls(
+            url,
+            comes_from=page_url,
+            requires_python=pyrequire,
+            yanked_reason=yanked_reason,
+            hashes=hashes,
+            dist_info_metadata=dist_info_metadata,
+        )
+
+    @classmethod
+    def from_element(
+        cls,
+        anchor_attribs: Dict[str, Optional[str]],
+        page_url: str,
+        base_url: str,
+    ) -> Optional["Link"]:
+        """
+        Convert an anchor element's attributes in a simple repository page to a Link.
+        """
+        href = anchor_attribs.get("href")
+        if not href:
+            return None
+
+        url = _ensure_quoted_url(urllib.parse.urljoin(base_url, href))
+        pyrequire = anchor_attribs.get("data-requires-python")
+        yanked_reason = anchor_attribs.get("data-yanked")
+        dist_info_metadata = anchor_attribs.get("data-dist-info-metadata")
+
+        return cls(
+            url,
+            comes_from=page_url,
+            requires_python=pyrequire,
+            yanked_reason=yanked_reason,
+            dist_info_metadata=dist_info_metadata,
+        )
+
+    def __str__(self) -> str:
+        if self.requires_python:
+            rp = f" (requires-python:{self.requires_python})"
+        else:
+            rp = ""
+        if self.comes_from:
+            return "{} (from {}){}".format(
+                redact_auth_from_url(self._url), self.comes_from, rp
+            )
+        else:
+            return redact_auth_from_url(str(self._url))
+
+    def __repr__(self) -> str:
+        return f"<Link {self}>"
+
+    @property
+    def url(self) -> str:
+        return self._url
+
+    @property
+    def filename(self) -> str:
+        path = self.path.rstrip("/")
+        name = posixpath.basename(path)
+        if not name:
+            # Make sure we don't leak auth information if the netloc
+            # includes a username and password.
+            netloc, user_pass = split_auth_from_netloc(self.netloc)
+            return netloc
+
+        name = urllib.parse.unquote(name)
+        assert name, f"URL {self._url!r} produced no filename"
+        return name
+
+    @property
+    def file_path(self) -> str:
+        return url_to_path(self.url)
+
+    @property
+    def scheme(self) -> str:
+        return self._parsed_url.scheme
+
+    @property
+    def netloc(self) -> str:
+        """
+        This can contain auth information.
+        """
+        return self._parsed_url.netloc
+
+    @property
+    def path(self) -> str:
+        return urllib.parse.unquote(self._parsed_url.path)
+
+    def splitext(self) -> Tuple[str, str]:
+        return splitext(posixpath.basename(self.path.rstrip("/")))
+
+    @property
+    def ext(self) -> str:
+        return self.splitext()[1]
+
+    @property
+    def url_without_fragment(self) -> str:
+        scheme, netloc, path, query, fragment = self._parsed_url
+        return urllib.parse.urlunsplit((scheme, netloc, path, query, ""))
+
+    _egg_fragment_re = re.compile(r"[#&]egg=([^&]*)")
+
+    @property
+    def egg_fragment(self) -> Optional[str]:
+        match = self._egg_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    _subdirectory_fragment_re = re.compile(r"[#&]subdirectory=([^&]*)")
+
+    @property
+    def subdirectory_fragment(self) -> Optional[str]:
+        match = self._subdirectory_fragment_re.search(self._url)
+        if not match:
+            return None
+        return match.group(1)
+
+    def metadata_link(self) -> Optional["Link"]:
+        """Implementation of PEP 658 parsing."""
+        # Note that Link.from_element() parsing the "data-dist-info-metadata" attribute
+        # from an HTML anchor tag is typically how the Link.dist_info_metadata attribute
+        # gets set.
+        if self.dist_info_metadata is None:
+            return None
+        metadata_url = f"{self.url_without_fragment}.metadata"
+        link_hash: Optional[LinkHash] = None
+        # If data-dist-info-metadata="true" is set, then the metadata file exists,
+        # but there is no information about its checksum or anything else.
+        if self.dist_info_metadata != "true":
+            link_hash = LinkHash.split_hash_name_and_value(self.dist_info_metadata)
+        return Link(metadata_url, link_hash=link_hash)
+
+    def as_hashes(self) -> Optional[Hashes]:
+        if self.link_hash is not None:
+            return self.link_hash.as_hashes()
+        return None
+
+    @property
+    def hash(self) -> Optional[str]:
+        if self.link_hash is not None:
+            return self.link_hash.value
+        return None
+
+    @property
+    def hash_name(self) -> Optional[str]:
+        if self.link_hash is not None:
+            return self.link_hash.name
+        return None
+
+    @property
+    def show_url(self) -> str:
+        return posixpath.basename(self._url.split("#", 1)[0].split("?", 1)[0])
+
+    @property
+    def is_file(self) -> bool:
+        return self.scheme == "file"
+
+    def is_existing_dir(self) -> bool:
+        return self.is_file and os.path.isdir(self.file_path)
+
+    @property
+    def is_wheel(self) -> bool:
+        return self.ext == WHEEL_EXTENSION
+
+    @property
+    def is_vcs(self) -> bool:
+        from pip._internal.vcs import vcs
+
+        return self.scheme in vcs.all_schemes
+
+    @property
+    def is_yanked(self) -> bool:
+        return self.yanked_reason is not None
+
+    @property
+    def has_hash(self) -> bool:
+        return self.link_hash is not None
+
+    def is_hash_allowed(self, hashes: Optional[Hashes]) -> bool:
+        """
+        Return True if the link has a hash and it is allowed by `hashes`.
+        """
+        if self.link_hash is None:
+            return False
+        return self.link_hash.is_hash_allowed(hashes)
+
+
+class _CleanResult(NamedTuple):
+    """Convert link for equivalency check.
+
+    This is used in the resolver to check whether two URL-specified requirements
+    likely point to the same distribution and can be considered equivalent. This
+    equivalency logic avoids comparing URLs literally, which can be too strict
+    (e.g. "a=1&b=2" vs "b=2&a=1") and produce conflicts unexpecting to users.
+
+    Currently this does three things:
+
+    1. Drop the basic auth part. This is technically wrong since a server can
+       serve different content based on auth, but if it does that, it is even
+       impossible to guarantee two URLs without auth are equivalent, since
+       the user can input different auth information when prompted. So the
+       practical solution is to assume the auth doesn't affect the response.
+    2. Parse the query to avoid the ordering issue. Note that ordering under the
+       same key in the query are NOT cleaned; i.e. "a=1&a=2" and "a=2&a=1" are
+       still considered different.
+    3. Explicitly drop most of the fragment part, except ``subdirectory=`` and
+       hash values, since it should have no impact the downloaded content. Note
+       that this drops the "egg=" part historically used to denote the requested
+       project (and extras), which is wrong in the strictest sense, but too many
+       people are supplying it inconsistently to cause superfluous resolution
+       conflicts, so we choose to also ignore them.
+    """
+
+    parsed: urllib.parse.SplitResult
+    query: Dict[str, List[str]]
+    subdirectory: str
+    hashes: Dict[str, str]
+
+
+def _clean_link(link: Link) -> _CleanResult:
+    parsed = link._parsed_url
+    netloc = parsed.netloc.rsplit("@", 1)[-1]
+    # According to RFC 8089, an empty host in file: means localhost.
+    if parsed.scheme == "file" and not netloc:
+        netloc = "localhost"
+    fragment = urllib.parse.parse_qs(parsed.fragment)
+    if "egg" in fragment:
+        logger.debug("Ignoring egg= fragment in %s", link)
+    try:
+        # If there are multiple subdirectory values, use the first one.
+        # This matches the behavior of Link.subdirectory_fragment.
+        subdirectory = fragment["subdirectory"][0]
+    except (IndexError, KeyError):
+        subdirectory = ""
+    # If there are multiple hash values under the same algorithm, use the
+    # first one. This matches the behavior of Link.hash_value.
+    hashes = {k: fragment[k][0] for k in _SUPPORTED_HASHES if k in fragment}
+    return _CleanResult(
+        parsed=parsed._replace(netloc=netloc, query="", fragment=""),
+        query=urllib.parse.parse_qs(parsed.query),
+        subdirectory=subdirectory,
+        hashes=hashes,
+    )
+
+
+@functools.lru_cache(maxsize=None)
+def links_equivalent(link1: Link, link2: Link) -> bool:
+    return _clean_link(link1) == _clean_link(link2)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/scheme.py b/venv/lib/python3.9/site-packages/pip/_internal/models/scheme.py
new file mode 100644
index 0000000..f51190a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/scheme.py
@@ -0,0 +1,31 @@
+"""
+For types associated with installation schemes.
+
+For a general overview of available schemes and their context, see
+https://docs.python.org/3/install/index.html#alternate-installation.
+"""
+
+
+SCHEME_KEYS = ["platlib", "purelib", "headers", "scripts", "data"]
+
+
+class Scheme:
+    """A Scheme holds paths which are used as the base directories for
+    artifacts associated with a Python package.
+    """
+
+    __slots__ = SCHEME_KEYS
+
+    def __init__(
+        self,
+        platlib: str,
+        purelib: str,
+        headers: str,
+        scripts: str,
+        data: str,
+    ) -> None:
+        self.platlib = platlib
+        self.purelib = purelib
+        self.headers = headers
+        self.scripts = scripts
+        self.data = data
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/search_scope.py b/venv/lib/python3.9/site-packages/pip/_internal/models/search_scope.py
new file mode 100644
index 0000000..a64af73
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/search_scope.py
@@ -0,0 +1,133 @@
+import itertools
+import logging
+import os
+import posixpath
+import urllib.parse
+from typing import List
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.models.index import PyPI
+from pip._internal.utils.compat import has_tls
+from pip._internal.utils.misc import normalize_path, redact_auth_from_url
+
+logger = logging.getLogger(__name__)
+
+
+class SearchScope:
+
+    """
+    Encapsulates the locations that pip is configured to search.
+    """
+
+    __slots__ = ["find_links", "index_urls", "no_index"]
+
+    @classmethod
+    def create(
+        cls,
+        find_links: List[str],
+        index_urls: List[str],
+        no_index: bool,
+    ) -> "SearchScope":
+        """
+        Create a SearchScope object after normalizing the `find_links`.
+        """
+        # Build find_links. If an argument starts with ~, it may be
+        # a local file relative to a home directory. So try normalizing
+        # it and if it exists, use the normalized version.
+        # This is deliberately conservative - it might be fine just to
+        # blindly normalize anything starting with a ~...
+        built_find_links: List[str] = []
+        for link in find_links:
+            if link.startswith("~"):
+                new_link = normalize_path(link)
+                if os.path.exists(new_link):
+                    link = new_link
+            built_find_links.append(link)
+
+        # If we don't have TLS enabled, then WARN if anyplace we're looking
+        # relies on TLS.
+        if not has_tls():
+            for link in itertools.chain(index_urls, built_find_links):
+                parsed = urllib.parse.urlparse(link)
+                if parsed.scheme == "https":
+                    logger.warning(
+                        "pip is configured with locations that require "
+                        "TLS/SSL, however the ssl module in Python is not "
+                        "available."
+                    )
+                    break
+
+        return cls(
+            find_links=built_find_links,
+            index_urls=index_urls,
+            no_index=no_index,
+        )
+
+    def __init__(
+        self,
+        find_links: List[str],
+        index_urls: List[str],
+        no_index: bool,
+    ) -> None:
+        self.find_links = find_links
+        self.index_urls = index_urls
+        self.no_index = no_index
+
+    def get_formatted_locations(self) -> str:
+        lines = []
+        redacted_index_urls = []
+        if self.index_urls and self.index_urls != [PyPI.simple_url]:
+            for url in self.index_urls:
+
+                redacted_index_url = redact_auth_from_url(url)
+
+                # Parse the URL
+                purl = urllib.parse.urlsplit(redacted_index_url)
+
+                # URL is generally invalid if scheme and netloc is missing
+                # there are issues with Python and URL parsing, so this test
+                # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
+                # always parse invalid URLs correctly - it should raise
+                # exceptions for malformed URLs
+                if not purl.scheme and not purl.netloc:
+                    logger.warning(
+                        'The index url "%s" seems invalid, please provide a scheme.',
+                        redacted_index_url,
+                    )
+
+                redacted_index_urls.append(redacted_index_url)
+
+            lines.append(
+                "Looking in indexes: {}".format(", ".join(redacted_index_urls))
+            )
+
+        if self.find_links:
+            lines.append(
+                "Looking in links: {}".format(
+                    ", ".join(redact_auth_from_url(url) for url in self.find_links)
+                )
+            )
+        return "\n".join(lines)
+
+    def get_index_urls_locations(self, project_name: str) -> List[str]:
+        """Returns the locations found via self.index_urls
+
+        Checks the url_name on the main (first in the list) index and
+        use this url_name to produce all locations
+        """
+
+        def mkurl_pypi_url(url: str) -> str:
+            loc = posixpath.join(
+                url, urllib.parse.quote(canonicalize_name(project_name))
+            )
+            # For maximum compatibility with easy_install, ensure the path
+            # ends in a trailing slash.  Although this isn't in the spec
+            # (and PyPI can handle it without the slash) some other index
+            # implementations might break if they relied on easy_install's
+            # behavior.
+            if not loc.endswith("/"):
+                loc = loc + "/"
+            return loc
+
+        return [mkurl_pypi_url(url) for url in self.index_urls]
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/selection_prefs.py b/venv/lib/python3.9/site-packages/pip/_internal/models/selection_prefs.py
new file mode 100644
index 0000000..977bc4c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/selection_prefs.py
@@ -0,0 +1,51 @@
+from typing import Optional
+
+from pip._internal.models.format_control import FormatControl
+
+
+class SelectionPreferences:
+    """
+    Encapsulates the candidate selection preferences for downloading
+    and installing files.
+    """
+
+    __slots__ = [
+        "allow_yanked",
+        "allow_all_prereleases",
+        "format_control",
+        "prefer_binary",
+        "ignore_requires_python",
+    ]
+
+    # Don't include an allow_yanked default value to make sure each call
+    # site considers whether yanked releases are allowed. This also causes
+    # that decision to be made explicit in the calling code, which helps
+    # people when reading the code.
+    def __init__(
+        self,
+        allow_yanked: bool,
+        allow_all_prereleases: bool = False,
+        format_control: Optional[FormatControl] = None,
+        prefer_binary: bool = False,
+        ignore_requires_python: Optional[bool] = None,
+    ) -> None:
+        """Create a SelectionPreferences object.
+
+        :param allow_yanked: Whether files marked as yanked (in the sense
+            of PEP 592) are permitted to be candidates for install.
+        :param format_control: A FormatControl object or None. Used to control
+            the selection of source packages / binary packages when consulting
+            the index and links.
+        :param prefer_binary: Whether to prefer an old, but valid, binary
+            dist over a new source dist.
+        :param ignore_requires_python: Whether to ignore incompatible
+            "Requires-Python" values in links. Defaults to False.
+        """
+        if ignore_requires_python is None:
+            ignore_requires_python = False
+
+        self.allow_yanked = allow_yanked
+        self.allow_all_prereleases = allow_all_prereleases
+        self.format_control = format_control
+        self.prefer_binary = prefer_binary
+        self.ignore_requires_python = ignore_requires_python
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/target_python.py b/venv/lib/python3.9/site-packages/pip/_internal/models/target_python.py
new file mode 100644
index 0000000..744bd7e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/target_python.py
@@ -0,0 +1,110 @@
+import sys
+from typing import List, Optional, Tuple
+
+from pip._vendor.packaging.tags import Tag
+
+from pip._internal.utils.compatibility_tags import get_supported, version_info_to_nodot
+from pip._internal.utils.misc import normalize_version_info
+
+
+class TargetPython:
+
+    """
+    Encapsulates the properties of a Python interpreter one is targeting
+    for a package install, download, etc.
+    """
+
+    __slots__ = [
+        "_given_py_version_info",
+        "abis",
+        "implementation",
+        "platforms",
+        "py_version",
+        "py_version_info",
+        "_valid_tags",
+    ]
+
+    def __init__(
+        self,
+        platforms: Optional[List[str]] = None,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+        abis: Optional[List[str]] = None,
+        implementation: Optional[str] = None,
+    ) -> None:
+        """
+        :param platforms: A list of strings or None. If None, searches for
+            packages that are supported by the current system. Otherwise, will
+            find packages that can be built on the platforms passed in. These
+            packages will only be downloaded for distribution: they will
+            not be built locally.
+        :param py_version_info: An optional tuple of ints representing the
+            Python version information to use (e.g. `sys.version_info[:3]`).
+            This can have length 1, 2, or 3 when provided.
+        :param abis: A list of strings or None. This is passed to
+            compatibility_tags.py's get_supported() function as is.
+        :param implementation: A string or None. This is passed to
+            compatibility_tags.py's get_supported() function as is.
+        """
+        # Store the given py_version_info for when we call get_supported().
+        self._given_py_version_info = py_version_info
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        py_version = ".".join(map(str, py_version_info[:2]))
+
+        self.abis = abis
+        self.implementation = implementation
+        self.platforms = platforms
+        self.py_version = py_version
+        self.py_version_info = py_version_info
+
+        # This is used to cache the return value of get_tags().
+        self._valid_tags: Optional[List[Tag]] = None
+
+    def format_given(self) -> str:
+        """
+        Format the given, non-None attributes for display.
+        """
+        display_version = None
+        if self._given_py_version_info is not None:
+            display_version = ".".join(
+                str(part) for part in self._given_py_version_info
+            )
+
+        key_values = [
+            ("platforms", self.platforms),
+            ("version_info", display_version),
+            ("abis", self.abis),
+            ("implementation", self.implementation),
+        ]
+        return " ".join(
+            f"{key}={value!r}" for key, value in key_values if value is not None
+        )
+
+    def get_tags(self) -> List[Tag]:
+        """
+        Return the supported PEP 425 tags to check wheel candidates against.
+
+        The tags are returned in order of preference (most preferred first).
+        """
+        if self._valid_tags is None:
+            # Pass versions=None if no py_version_info was given since
+            # versions=None uses special default logic.
+            py_version_info = self._given_py_version_info
+            if py_version_info is None:
+                version = None
+            else:
+                version = version_info_to_nodot(py_version_info)
+
+            tags = get_supported(
+                version=version,
+                platforms=self.platforms,
+                abis=self.abis,
+                impl=self.implementation,
+            )
+            self._valid_tags = tags
+
+        return self._valid_tags
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/models/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/models/wheel.py
new file mode 100644
index 0000000..a5dc12b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/models/wheel.py
@@ -0,0 +1,92 @@
+"""Represents a wheel file and provides access to the various parts of the
+name that have meaning.
+"""
+import re
+from typing import Dict, Iterable, List
+
+from pip._vendor.packaging.tags import Tag
+
+from pip._internal.exceptions import InvalidWheelFilename
+
+
+class Wheel:
+    """A wheel file"""
+
+    wheel_file_re = re.compile(
+        r"""^(?P<namever>(?P<name>[^\s-]+?)-(?P<ver>[^\s-]*?))
+        ((-(?P<build>\d[^-]*?))?-(?P<pyver>[^\s-]+?)-(?P<abi>[^\s-]+?)-(?P<plat>[^\s-]+?)
+        \.whl|\.dist-info)$""",
+        re.VERBOSE,
+    )
+
+    def __init__(self, filename: str) -> None:
+        """
+        :raises InvalidWheelFilename: when the filename is invalid for a wheel
+        """
+        wheel_info = self.wheel_file_re.match(filename)
+        if not wheel_info:
+            raise InvalidWheelFilename(f"{filename} is not a valid wheel filename.")
+        self.filename = filename
+        self.name = wheel_info.group("name").replace("_", "-")
+        # we'll assume "_" means "-" due to wheel naming scheme
+        # (https://github.com/pypa/pip/issues/1150)
+        self.version = wheel_info.group("ver").replace("_", "-")
+        self.build_tag = wheel_info.group("build")
+        self.pyversions = wheel_info.group("pyver").split(".")
+        self.abis = wheel_info.group("abi").split(".")
+        self.plats = wheel_info.group("plat").split(".")
+
+        # All the tag combinations from this file
+        self.file_tags = {
+            Tag(x, y, z) for x in self.pyversions for y in self.abis for z in self.plats
+        }
+
+    def get_formatted_file_tags(self) -> List[str]:
+        """Return the wheel's tags as a sorted list of strings."""
+        return sorted(str(tag) for tag in self.file_tags)
+
+    def support_index_min(self, tags: List[Tag]) -> int:
+        """Return the lowest index that one of the wheel's file_tag combinations
+        achieves in the given list of supported tags.
+
+        For example, if there are 8 supported tags and one of the file tags
+        is first in the list, then return 0.
+
+        :param tags: the PEP 425 tags to check the wheel against, in order
+            with most preferred first.
+
+        :raises ValueError: If none of the wheel's file tags match one of
+            the supported tags.
+        """
+        try:
+            return next(i for i, t in enumerate(tags) if t in self.file_tags)
+        except StopIteration:
+            raise ValueError()
+
+    def find_most_preferred_tag(
+        self, tags: List[Tag], tag_to_priority: Dict[Tag, int]
+    ) -> int:
+        """Return the priority of the most preferred tag that one of the wheel's file
+        tag combinations achieves in the given list of supported tags using the given
+        tag_to_priority mapping, where lower priorities are more-preferred.
+
+        This is used in place of support_index_min in some cases in order to avoid
+        an expensive linear scan of a large list of tags.
+
+        :param tags: the PEP 425 tags to check the wheel against.
+        :param tag_to_priority: a mapping from tag to priority of that tag, where
+            lower is more preferred.
+
+        :raises ValueError: If none of the wheel's file tags match one of
+            the supported tags.
+        """
+        return min(
+            tag_to_priority[tag] for tag in self.file_tags if tag in tag_to_priority
+        )
+
+    def supported(self, tags: Iterable[Tag]) -> bool:
+        """Return whether the wheel is compatible with one of the given tags.
+
+        :param tags: the PEP 425 tags to check the wheel against.
+        """
+        return not self.file_tags.isdisjoint(tags)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/network/__init__.py
new file mode 100644
index 0000000..b51bde9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/__init__.py
@@ -0,0 +1,2 @@
+"""Contains purely network-related utilities.
+"""
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/utils.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/xmlrpc.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/xmlrpc.cpython-39.pyc
new file mode 100644
index 0000000..ff2ff04
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+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/__pycache__/xmlrpc.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/auth.py b/venv/lib/python3.9/site-packages/pip/_internal/network/auth.py
new file mode 100644
index 0000000..ca42798
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/auth.py
@@ -0,0 +1,323 @@
+"""Network Authentication Helpers
+
+Contains interface (MultiDomainBasicAuth) and associated glue code for
+providing credentials in the context of network requests.
+"""
+
+import urllib.parse
+from typing import Any, Dict, List, Optional, Tuple
+
+from pip._vendor.requests.auth import AuthBase, HTTPBasicAuth
+from pip._vendor.requests.models import Request, Response
+from pip._vendor.requests.utils import get_netrc_auth
+
+from pip._internal.utils.logging import getLogger
+from pip._internal.utils.misc import (
+    ask,
+    ask_input,
+    ask_password,
+    remove_auth_from_url,
+    split_auth_netloc_from_url,
+)
+from pip._internal.vcs.versioncontrol import AuthInfo
+
+logger = getLogger(__name__)
+
+Credentials = Tuple[str, str, str]
+
+try:
+    import keyring
+except ImportError:
+    keyring = None  # type: ignore[assignment]
+except Exception as exc:
+    logger.warning(
+        "Keyring is skipped due to an exception: %s",
+        str(exc),
+    )
+    keyring = None  # type: ignore[assignment]
+
+
+def get_keyring_auth(url: Optional[str], username: Optional[str]) -> Optional[AuthInfo]:
+    """Return the tuple auth for a given url from keyring."""
+    global keyring
+    if not url or not keyring:
+        return None
+
+    try:
+        try:
+            get_credential = keyring.get_credential
+        except AttributeError:
+            pass
+        else:
+            logger.debug("Getting credentials from keyring for %s", url)
+            cred = get_credential(url, username)
+            if cred is not None:
+                return cred.username, cred.password
+            return None
+
+        if username:
+            logger.debug("Getting password from keyring for %s", url)
+            password = keyring.get_password(url, username)
+            if password:
+                return username, password
+
+    except Exception as exc:
+        logger.warning(
+            "Keyring is skipped due to an exception: %s",
+            str(exc),
+        )
+        keyring = None  # type: ignore[assignment]
+    return None
+
+
+class MultiDomainBasicAuth(AuthBase):
+    def __init__(
+        self, prompting: bool = True, index_urls: Optional[List[str]] = None
+    ) -> None:
+        self.prompting = prompting
+        self.index_urls = index_urls
+        self.passwords: Dict[str, AuthInfo] = {}
+        # When the user is prompted to enter credentials and keyring is
+        # available, we will offer to save them. If the user accepts,
+        # this value is set to the credentials they entered. After the
+        # request authenticates, the caller should call
+        # ``save_credentials`` to save these.
+        self._credentials_to_save: Optional[Credentials] = None
+
+    def _get_index_url(self, url: str) -> Optional[str]:
+        """Return the original index URL matching the requested URL.
+
+        Cached or dynamically generated credentials may work against
+        the original index URL rather than just the netloc.
+
+        The provided url should have had its username and password
+        removed already. If the original index url had credentials then
+        they will be included in the return value.
+
+        Returns None if no matching index was found, or if --no-index
+        was specified by the user.
+        """
+        if not url or not self.index_urls:
+            return None
+
+        for u in self.index_urls:
+            prefix = remove_auth_from_url(u).rstrip("/") + "/"
+            if url.startswith(prefix):
+                return u
+        return None
+
+    def _get_new_credentials(
+        self,
+        original_url: str,
+        allow_netrc: bool = True,
+        allow_keyring: bool = False,
+    ) -> AuthInfo:
+        """Find and return credentials for the specified URL."""
+        # Split the credentials and netloc from the url.
+        url, netloc, url_user_password = split_auth_netloc_from_url(
+            original_url,
+        )
+
+        # Start with the credentials embedded in the url
+        username, password = url_user_password
+        if username is not None and password is not None:
+            logger.debug("Found credentials in url for %s", netloc)
+            return url_user_password
+
+        # Find a matching index url for this request
+        index_url = self._get_index_url(url)
+        if index_url:
+            # Split the credentials from the url.
+            index_info = split_auth_netloc_from_url(index_url)
+            if index_info:
+                index_url, _, index_url_user_password = index_info
+                logger.debug("Found index url %s", index_url)
+
+        # If an index URL was found, try its embedded credentials
+        if index_url and index_url_user_password[0] is not None:
+            username, password = index_url_user_password
+            if username is not None and password is not None:
+                logger.debug("Found credentials in index url for %s", netloc)
+                return index_url_user_password
+
+        # Get creds from netrc if we still don't have them
+        if allow_netrc:
+            netrc_auth = get_netrc_auth(original_url)
+            if netrc_auth:
+                logger.debug("Found credentials in netrc for %s", netloc)
+                return netrc_auth
+
+        # If we don't have a password and keyring is available, use it.
+        if allow_keyring:
+            # The index url is more specific than the netloc, so try it first
+            # fmt: off
+            kr_auth = (
+                get_keyring_auth(index_url, username) or
+                get_keyring_auth(netloc, username)
+            )
+            # fmt: on
+            if kr_auth:
+                logger.debug("Found credentials in keyring for %s", netloc)
+                return kr_auth
+
+        return username, password
+
+    def _get_url_and_credentials(
+        self, original_url: str
+    ) -> Tuple[str, Optional[str], Optional[str]]:
+        """Return the credentials to use for the provided URL.
+
+        If allowed, netrc and keyring may be used to obtain the
+        correct credentials.
+
+        Returns (url_without_credentials, username, password). Note
+        that even if the original URL contains credentials, this
+        function may return a different username and password.
+        """
+        url, netloc, _ = split_auth_netloc_from_url(original_url)
+
+        # Try to get credentials from original url
+        username, password = self._get_new_credentials(original_url)
+
+        # If credentials not found, use any stored credentials for this netloc.
+        # Do this if either the username or the password is missing.
+        # This accounts for the situation in which the user has specified
+        # the username in the index url, but the password comes from keyring.
+        if (username is None or password is None) and netloc in self.passwords:
+            un, pw = self.passwords[netloc]
+            # It is possible that the cached credentials are for a different username,
+            # in which case the cache should be ignored.
+            if username is None or username == un:
+                username, password = un, pw
+
+        if username is not None or password is not None:
+            # Convert the username and password if they're None, so that
+            # this netloc will show up as "cached" in the conditional above.
+            # Further, HTTPBasicAuth doesn't accept None, so it makes sense to
+            # cache the value that is going to be used.
+            username = username or ""
+            password = password or ""
+
+            # Store any acquired credentials.
+            self.passwords[netloc] = (username, password)
+
+        assert (
+            # Credentials were found
+            (username is not None and password is not None)
+            # Credentials were not found
+            or (username is None and password is None)
+        ), f"Could not load credentials from url: {original_url}"
+
+        return url, username, password
+
+    def __call__(self, req: Request) -> Request:
+        # Get credentials for this request
+        url, username, password = self._get_url_and_credentials(req.url)
+
+        # Set the url of the request to the url without any credentials
+        req.url = url
+
+        if username is not None and password is not None:
+            # Send the basic auth with this request
+            req = HTTPBasicAuth(username, password)(req)
+
+        # Attach a hook to handle 401 responses
+        req.register_hook("response", self.handle_401)
+
+        return req
+
+    # Factored out to allow for easy patching in tests
+    def _prompt_for_password(
+        self, netloc: str
+    ) -> Tuple[Optional[str], Optional[str], bool]:
+        username = ask_input(f"User for {netloc}: ")
+        if not username:
+            return None, None, False
+        auth = get_keyring_auth(netloc, username)
+        if auth and auth[0] is not None and auth[1] is not None:
+            return auth[0], auth[1], False
+        password = ask_password("Password: ")
+        return username, password, True
+
+    # Factored out to allow for easy patching in tests
+    def _should_save_password_to_keyring(self) -> bool:
+        if not keyring:
+            return False
+        return ask("Save credentials to keyring [y/N]: ", ["y", "n"]) == "y"
+
+    def handle_401(self, resp: Response, **kwargs: Any) -> Response:
+        # We only care about 401 responses, anything else we want to just
+        #   pass through the actual response
+        if resp.status_code != 401:
+            return resp
+
+        # We are not able to prompt the user so simply return the response
+        if not self.prompting:
+            return resp
+
+        parsed = urllib.parse.urlparse(resp.url)
+
+        # Query the keyring for credentials:
+        username, password = self._get_new_credentials(
+            resp.url,
+            allow_netrc=False,
+            allow_keyring=True,
+        )
+
+        # Prompt the user for a new username and password
+        save = False
+        if not username and not password:
+            username, password, save = self._prompt_for_password(parsed.netloc)
+
+        # Store the new username and password to use for future requests
+        self._credentials_to_save = None
+        if username is not None and password is not None:
+            self.passwords[parsed.netloc] = (username, password)
+
+            # Prompt to save the password to keyring
+            if save and self._should_save_password_to_keyring():
+                self._credentials_to_save = (parsed.netloc, username, password)
+
+        # Consume content and release the original connection to allow our new
+        #   request to reuse the same one.
+        resp.content
+        resp.raw.release_conn()
+
+        # Add our new username and password to the request
+        req = HTTPBasicAuth(username or "", password or "")(resp.request)
+        req.register_hook("response", self.warn_on_401)
+
+        # On successful request, save the credentials that were used to
+        # keyring. (Note that if the user responded "no" above, this member
+        # is not set and nothing will be saved.)
+        if self._credentials_to_save:
+            req.register_hook("response", self.save_credentials)
+
+        # Send our new request
+        new_resp = resp.connection.send(req, **kwargs)
+        new_resp.history.append(resp)
+
+        return new_resp
+
+    def warn_on_401(self, resp: Response, **kwargs: Any) -> None:
+        """Response callback to warn about incorrect credentials."""
+        if resp.status_code == 401:
+            logger.warning(
+                "401 Error, Credentials not correct for %s",
+                resp.request.url,
+            )
+
+    def save_credentials(self, resp: Response, **kwargs: Any) -> None:
+        """Response callback to save credentials on success."""
+        assert keyring is not None, "should never reach here without keyring"
+        if not keyring:
+            return
+
+        creds = self._credentials_to_save
+        self._credentials_to_save = None
+        if creds and resp.status_code < 400:
+            try:
+                logger.info("Saving credentials to keyring")
+                keyring.set_password(*creds)
+            except Exception:
+                logger.exception("Failed to save credentials")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/cache.py b/venv/lib/python3.9/site-packages/pip/_internal/network/cache.py
new file mode 100644
index 0000000..a81a239
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/cache.py
@@ -0,0 +1,69 @@
+"""HTTP cache implementation.
+"""
+
+import os
+from contextlib import contextmanager
+from typing import Generator, Optional
+
+from pip._vendor.cachecontrol.cache import BaseCache
+from pip._vendor.cachecontrol.caches import FileCache
+from pip._vendor.requests.models import Response
+
+from pip._internal.utils.filesystem import adjacent_tmp_file, replace
+from pip._internal.utils.misc import ensure_dir
+
+
+def is_from_cache(response: Response) -> bool:
+    return getattr(response, "from_cache", False)
+
+
+@contextmanager
+def suppressed_cache_errors() -> Generator[None, None, None]:
+    """If we can't access the cache then we can just skip caching and process
+    requests as if caching wasn't enabled.
+    """
+    try:
+        yield
+    except OSError:
+        pass
+
+
+class SafeFileCache(BaseCache):
+    """
+    A file based cache which is safe to use even when the target directory may
+    not be accessible or writable.
+    """
+
+    def __init__(self, directory: str) -> None:
+        assert directory is not None, "Cache directory must not be None."
+        super().__init__()
+        self.directory = directory
+
+    def _get_cache_path(self, name: str) -> str:
+        # From cachecontrol.caches.file_cache.FileCache._fn, brought into our
+        # class for backwards-compatibility and to avoid using a non-public
+        # method.
+        hashed = FileCache.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key: str) -> Optional[bytes]:
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            with open(path, "rb") as f:
+                return f.read()
+
+    def set(self, key: str, value: bytes, expires: Optional[int] = None) -> None:
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            ensure_dir(os.path.dirname(path))
+
+            with adjacent_tmp_file(path) as f:
+                f.write(value)
+
+            replace(f.name, path)
+
+    def delete(self, key: str) -> None:
+        path = self._get_cache_path(key)
+        with suppressed_cache_errors():
+            os.remove(path)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/download.py b/venv/lib/python3.9/site-packages/pip/_internal/network/download.py
new file mode 100644
index 0000000..79b82a5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/download.py
@@ -0,0 +1,186 @@
+"""Download files with progress indicators.
+"""
+import email.message
+import logging
+import mimetypes
+import os
+from typing import Iterable, Optional, Tuple
+
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+
+from pip._internal.cli.progress_bars import get_download_progress_renderer
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.models.index import PyPI
+from pip._internal.models.link import Link
+from pip._internal.network.cache import is_from_cache
+from pip._internal.network.session import PipSession
+from pip._internal.network.utils import HEADERS, raise_for_status, response_chunks
+from pip._internal.utils.misc import format_size, redact_auth_from_url, splitext
+
+logger = logging.getLogger(__name__)
+
+
+def _get_http_response_size(resp: Response) -> Optional[int]:
+    try:
+        return int(resp.headers["content-length"])
+    except (ValueError, KeyError, TypeError):
+        return None
+
+
+def _prepare_download(
+    resp: Response,
+    link: Link,
+    progress_bar: str,
+) -> Iterable[bytes]:
+    total_length = _get_http_response_size(resp)
+
+    if link.netloc == PyPI.file_storage_domain:
+        url = link.show_url
+    else:
+        url = link.url_without_fragment
+
+    logged_url = redact_auth_from_url(url)
+
+    if total_length:
+        logged_url = "{} ({})".format(logged_url, format_size(total_length))
+
+    if is_from_cache(resp):
+        logger.info("Using cached %s", logged_url)
+    else:
+        logger.info("Downloading %s", logged_url)
+
+    if logger.getEffectiveLevel() > logging.INFO:
+        show_progress = False
+    elif is_from_cache(resp):
+        show_progress = False
+    elif not total_length:
+        show_progress = True
+    elif total_length > (40 * 1000):
+        show_progress = True
+    else:
+        show_progress = False
+
+    chunks = response_chunks(resp, CONTENT_CHUNK_SIZE)
+
+    if not show_progress:
+        return chunks
+
+    renderer = get_download_progress_renderer(bar_type=progress_bar, size=total_length)
+    return renderer(chunks)
+
+
+def sanitize_content_filename(filename: str) -> str:
+    """
+    Sanitize the "filename" value from a Content-Disposition header.
+    """
+    return os.path.basename(filename)
+
+
+def parse_content_disposition(content_disposition: str, default_filename: str) -> str:
+    """
+    Parse the "filename" value from a Content-Disposition header, and
+    return the default filename if the result is empty.
+    """
+    m = email.message.Message()
+    m["content-type"] = content_disposition
+    filename = m.get_param("filename")
+    if filename:
+        # We need to sanitize the filename to prevent directory traversal
+        # in case the filename contains ".." path parts.
+        filename = sanitize_content_filename(str(filename))
+    return filename or default_filename
+
+
+def _get_http_response_filename(resp: Response, link: Link) -> str:
+    """Get an ideal filename from the given HTTP response, falling back to
+    the link filename if not provided.
+    """
+    filename = link.filename  # fallback
+    # Have a look at the Content-Disposition header for a better guess
+    content_disposition = resp.headers.get("content-disposition")
+    if content_disposition:
+        filename = parse_content_disposition(content_disposition, filename)
+    ext: Optional[str] = splitext(filename)[1]
+    if not ext:
+        ext = mimetypes.guess_extension(resp.headers.get("content-type", ""))
+        if ext:
+            filename += ext
+    if not ext and link.url != resp.url:
+        ext = os.path.splitext(resp.url)[1]
+        if ext:
+            filename += ext
+    return filename
+
+
+def _http_get_download(session: PipSession, link: Link) -> Response:
+    target_url = link.url.split("#", 1)[0]
+    resp = session.get(target_url, headers=HEADERS, stream=True)
+    raise_for_status(resp)
+    return resp
+
+
+class Downloader:
+    def __init__(
+        self,
+        session: PipSession,
+        progress_bar: str,
+    ) -> None:
+        self._session = session
+        self._progress_bar = progress_bar
+
+    def __call__(self, link: Link, location: str) -> Tuple[str, str]:
+        """Download the file given by link into location."""
+        try:
+            resp = _http_get_download(self._session, link)
+        except NetworkConnectionError as e:
+            assert e.response is not None
+            logger.critical(
+                "HTTP error %s while getting %s", e.response.status_code, link
+            )
+            raise
+
+        filename = _get_http_response_filename(resp, link)
+        filepath = os.path.join(location, filename)
+
+        chunks = _prepare_download(resp, link, self._progress_bar)
+        with open(filepath, "wb") as content_file:
+            for chunk in chunks:
+                content_file.write(chunk)
+        content_type = resp.headers.get("Content-Type", "")
+        return filepath, content_type
+
+
+class BatchDownloader:
+    def __init__(
+        self,
+        session: PipSession,
+        progress_bar: str,
+    ) -> None:
+        self._session = session
+        self._progress_bar = progress_bar
+
+    def __call__(
+        self, links: Iterable[Link], location: str
+    ) -> Iterable[Tuple[Link, Tuple[str, str]]]:
+        """Download the files given by links into location."""
+        for link in links:
+            try:
+                resp = _http_get_download(self._session, link)
+            except NetworkConnectionError as e:
+                assert e.response is not None
+                logger.critical(
+                    "HTTP error %s while getting %s",
+                    e.response.status_code,
+                    link,
+                )
+                raise
+
+            filename = _get_http_response_filename(resp, link)
+            filepath = os.path.join(location, filename)
+
+            chunks = _prepare_download(resp, link, self._progress_bar)
+            with open(filepath, "wb") as content_file:
+                for chunk in chunks:
+                    content_file.write(chunk)
+            content_type = resp.headers.get("Content-Type", "")
+            yield link, (filepath, content_type)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/lazy_wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/network/lazy_wheel.py
new file mode 100644
index 0000000..854a6fa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/lazy_wheel.py
@@ -0,0 +1,210 @@
+"""Lazy ZIP over HTTP"""
+
+__all__ = ["HTTPRangeRequestUnsupported", "dist_from_wheel_url"]
+
+from bisect import bisect_left, bisect_right
+from contextlib import contextmanager
+from tempfile import NamedTemporaryFile
+from typing import Any, Dict, Generator, List, Optional, Tuple
+from zipfile import BadZipfile, ZipFile
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+
+from pip._internal.metadata import BaseDistribution, MemoryWheel, get_wheel_distribution
+from pip._internal.network.session import PipSession
+from pip._internal.network.utils import HEADERS, raise_for_status, response_chunks
+
+
+class HTTPRangeRequestUnsupported(Exception):
+    pass
+
+
+def dist_from_wheel_url(name: str, url: str, session: PipSession) -> BaseDistribution:
+    """Return a distribution object from the given wheel URL.
+
+    This uses HTTP range requests to only fetch the portion of the wheel
+    containing metadata, just enough for the object to be constructed.
+    If such requests are not supported, HTTPRangeRequestUnsupported
+    is raised.
+    """
+    with LazyZipOverHTTP(url, session) as zf:
+        # For read-only ZIP files, ZipFile only needs methods read,
+        # seek, seekable and tell, not the whole IO protocol.
+        wheel = MemoryWheel(zf.name, zf)  # type: ignore
+        # After context manager exit, wheel.name
+        # is an invalid file by intention.
+        return get_wheel_distribution(wheel, canonicalize_name(name))
+
+
+class LazyZipOverHTTP:
+    """File-like object mapped to a ZIP file over HTTP.
+
+    This uses HTTP range requests to lazily fetch the file's content,
+    which is supposed to be fed to ZipFile.  If such requests are not
+    supported by the server, raise HTTPRangeRequestUnsupported
+    during initialization.
+    """
+
+    def __init__(
+        self, url: str, session: PipSession, chunk_size: int = CONTENT_CHUNK_SIZE
+    ) -> None:
+        head = session.head(url, headers=HEADERS)
+        raise_for_status(head)
+        assert head.status_code == 200
+        self._session, self._url, self._chunk_size = session, url, chunk_size
+        self._length = int(head.headers["Content-Length"])
+        self._file = NamedTemporaryFile()
+        self.truncate(self._length)
+        self._left: List[int] = []
+        self._right: List[int] = []
+        if "bytes" not in head.headers.get("Accept-Ranges", "none"):
+            raise HTTPRangeRequestUnsupported("range request is not supported")
+        self._check_zip()
+
+    @property
+    def mode(self) -> str:
+        """Opening mode, which is always rb."""
+        return "rb"
+
+    @property
+    def name(self) -> str:
+        """Path to the underlying file."""
+        return self._file.name
+
+    def seekable(self) -> bool:
+        """Return whether random access is supported, which is True."""
+        return True
+
+    def close(self) -> None:
+        """Close the file."""
+        self._file.close()
+
+    @property
+    def closed(self) -> bool:
+        """Whether the file is closed."""
+        return self._file.closed
+
+    def read(self, size: int = -1) -> bytes:
+        """Read up to size bytes from the object and return them.
+
+        As a convenience, if size is unspecified or -1,
+        all bytes until EOF are returned.  Fewer than
+        size bytes may be returned if EOF is reached.
+        """
+        download_size = max(size, self._chunk_size)
+        start, length = self.tell(), self._length
+        stop = length if size < 0 else min(start + download_size, length)
+        start = max(0, stop - download_size)
+        self._download(start, stop - 1)
+        return self._file.read(size)
+
+    def readable(self) -> bool:
+        """Return whether the file is readable, which is True."""
+        return True
+
+    def seek(self, offset: int, whence: int = 0) -> int:
+        """Change stream position and return the new absolute position.
+
+        Seek to offset relative position indicated by whence:
+        * 0: Start of stream (the default).  pos should be >= 0;
+        * 1: Current position - pos may be negative;
+        * 2: End of stream - pos usually negative.
+        """
+        return self._file.seek(offset, whence)
+
+    def tell(self) -> int:
+        """Return the current position."""
+        return self._file.tell()
+
+    def truncate(self, size: Optional[int] = None) -> int:
+        """Resize the stream to the given size in bytes.
+
+        If size is unspecified resize to the current position.
+        The current stream position isn't changed.
+
+        Return the new file size.
+        """
+        return self._file.truncate(size)
+
+    def writable(self) -> bool:
+        """Return False."""
+        return False
+
+    def __enter__(self) -> "LazyZipOverHTTP":
+        self._file.__enter__()
+        return self
+
+    def __exit__(self, *exc: Any) -> None:
+        self._file.__exit__(*exc)
+
+    @contextmanager
+    def _stay(self) -> Generator[None, None, None]:
+        """Return a context manager keeping the position.
+
+        At the end of the block, seek back to original position.
+        """
+        pos = self.tell()
+        try:
+            yield
+        finally:
+            self.seek(pos)
+
+    def _check_zip(self) -> None:
+        """Check and download until the file is a valid ZIP."""
+        end = self._length - 1
+        for start in reversed(range(0, end, self._chunk_size)):
+            self._download(start, end)
+            with self._stay():
+                try:
+                    # For read-only ZIP files, ZipFile only needs
+                    # methods read, seek, seekable and tell.
+                    ZipFile(self)  # type: ignore
+                except BadZipfile:
+                    pass
+                else:
+                    break
+
+    def _stream_response(
+        self, start: int, end: int, base_headers: Dict[str, str] = HEADERS
+    ) -> Response:
+        """Return HTTP response to a range request from start to end."""
+        headers = base_headers.copy()
+        headers["Range"] = f"bytes={start}-{end}"
+        # TODO: Get range requests to be correctly cached
+        headers["Cache-Control"] = "no-cache"
+        return self._session.get(self._url, headers=headers, stream=True)
+
+    def _merge(
+        self, start: int, end: int, left: int, right: int
+    ) -> Generator[Tuple[int, int], None, None]:
+        """Return a generator of intervals to be fetched.
+
+        Args:
+            start (int): Start of needed interval
+            end (int): End of needed interval
+            left (int): Index of first overlapping downloaded data
+            right (int): Index after last overlapping downloaded data
+        """
+        lslice, rslice = self._left[left:right], self._right[left:right]
+        i = start = min([start] + lslice[:1])
+        end = max([end] + rslice[-1:])
+        for j, k in zip(lslice, rslice):
+            if j > i:
+                yield i, j - 1
+            i = k + 1
+        if i <= end:
+            yield i, end
+        self._left[left:right], self._right[left:right] = [start], [end]
+
+    def _download(self, start: int, end: int) -> None:
+        """Download bytes from start to end inclusively."""
+        with self._stay():
+            left = bisect_left(self._right, start)
+            right = bisect_right(self._left, end)
+            for start, end in self._merge(start, end, left, right):
+                response = self._stream_response(start, end)
+                response.raise_for_status()
+                self.seek(start)
+                for chunk in response_chunks(response, self._chunk_size):
+                    self._file.write(chunk)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/session.py b/venv/lib/python3.9/site-packages/pip/_internal/network/session.py
new file mode 100644
index 0000000..e512ac7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/session.py
@@ -0,0 +1,518 @@
+"""PipSession and supporting code, containing all pip-specific
+network request configuration and behavior.
+"""
+
+import email.utils
+import io
+import ipaddress
+import json
+import logging
+import mimetypes
+import os
+import platform
+import shutil
+import subprocess
+import sys
+import urllib.parse
+import warnings
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    Generator,
+    List,
+    Mapping,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)
+
+from pip._vendor import requests, urllib3
+from pip._vendor.cachecontrol import CacheControlAdapter as _BaseCacheControlAdapter
+from pip._vendor.requests.adapters import DEFAULT_POOLBLOCK, BaseAdapter
+from pip._vendor.requests.adapters import HTTPAdapter as _BaseHTTPAdapter
+from pip._vendor.requests.models import PreparedRequest, Response
+from pip._vendor.requests.structures import CaseInsensitiveDict
+from pip._vendor.urllib3.connectionpool import ConnectionPool
+from pip._vendor.urllib3.exceptions import InsecureRequestWarning
+
+from pip import __version__
+from pip._internal.metadata import get_default_environment
+from pip._internal.models.link import Link
+from pip._internal.network.auth import MultiDomainBasicAuth
+from pip._internal.network.cache import SafeFileCache
+
+# Import ssl from compat so the initial import occurs in only one place.
+from pip._internal.utils.compat import has_tls
+from pip._internal.utils.glibc import libc_ver
+from pip._internal.utils.misc import build_url_from_netloc, parse_netloc
+from pip._internal.utils.urls import url_to_path
+
+if TYPE_CHECKING:
+    from ssl import SSLContext
+
+    from pip._vendor.urllib3.poolmanager import PoolManager
+
+
+logger = logging.getLogger(__name__)
+
+SecureOrigin = Tuple[str, str, Optional[Union[int, str]]]
+
+
+# Ignore warning raised when using --trusted-host.
+warnings.filterwarnings("ignore", category=InsecureRequestWarning)
+
+
+SECURE_ORIGINS: List[SecureOrigin] = [
+    # protocol, hostname, port
+    # Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC)
+    ("https", "*", "*"),
+    ("*", "localhost", "*"),
+    ("*", "127.0.0.0/8", "*"),
+    ("*", "::1/128", "*"),
+    ("file", "*", None),
+    # ssh is always secure.
+    ("ssh", "*", "*"),
+]
+
+
+# These are environment variables present when running under various
+# CI systems.  For each variable, some CI systems that use the variable
+# are indicated.  The collection was chosen so that for each of a number
+# of popular systems, at least one of the environment variables is used.
+# This list is used to provide some indication of and lower bound for
+# CI traffic to PyPI.  Thus, it is okay if the list is not comprehensive.
+# For more background, see: https://github.com/pypa/pip/issues/5499
+CI_ENVIRONMENT_VARIABLES = (
+    # Azure Pipelines
+    "BUILD_BUILDID",
+    # Jenkins
+    "BUILD_ID",
+    # AppVeyor, CircleCI, Codeship, Gitlab CI, Shippable, Travis CI
+    "CI",
+    # Explicit environment variable.
+    "PIP_IS_CI",
+)
+
+
+def looks_like_ci() -> bool:
+    """
+    Return whether it looks like pip is running under CI.
+    """
+    # We don't use the method of checking for a tty (e.g. using isatty())
+    # because some CI systems mimic a tty (e.g. Travis CI).  Thus that
+    # method doesn't provide definitive information in either direction.
+    return any(name in os.environ for name in CI_ENVIRONMENT_VARIABLES)
+
+
+def user_agent() -> str:
+    """
+    Return a string representing the user agent.
+    """
+    data: Dict[str, Any] = {
+        "installer": {"name": "pip", "version": __version__},
+        "python": platform.python_version(),
+        "implementation": {
+            "name": platform.python_implementation(),
+        },
+    }
+
+    if data["implementation"]["name"] == "CPython":
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == "PyPy":
+        pypy_version_info = sys.pypy_version_info  # type: ignore
+        if pypy_version_info.releaselevel == "final":
+            pypy_version_info = pypy_version_info[:3]
+        data["implementation"]["version"] = ".".join(
+            [str(x) for x in pypy_version_info]
+        )
+    elif data["implementation"]["name"] == "Jython":
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+    elif data["implementation"]["name"] == "IronPython":
+        # Complete Guess
+        data["implementation"]["version"] = platform.python_version()
+
+    if sys.platform.startswith("linux"):
+        from pip._vendor import distro
+
+        linux_distribution = distro.name(), distro.version(), distro.codename()
+        distro_infos: Dict[str, Any] = dict(
+            filter(
+                lambda x: x[1],
+                zip(["name", "version", "id"], linux_distribution),
+            )
+        )
+        libc = dict(
+            filter(
+                lambda x: x[1],
+                zip(["lib", "version"], libc_ver()),
+            )
+        )
+        if libc:
+            distro_infos["libc"] = libc
+        if distro_infos:
+            data["distro"] = distro_infos
+
+    if sys.platform.startswith("darwin") and platform.mac_ver()[0]:
+        data["distro"] = {"name": "macOS", "version": platform.mac_ver()[0]}
+
+    if platform.system():
+        data.setdefault("system", {})["name"] = platform.system()
+
+    if platform.release():
+        data.setdefault("system", {})["release"] = platform.release()
+
+    if platform.machine():
+        data["cpu"] = platform.machine()
+
+    if has_tls():
+        import _ssl as ssl
+
+        data["openssl_version"] = ssl.OPENSSL_VERSION
+
+    setuptools_dist = get_default_environment().get_distribution("setuptools")
+    if setuptools_dist is not None:
+        data["setuptools_version"] = str(setuptools_dist.version)
+
+    if shutil.which("rustc") is not None:
+        # If for any reason `rustc --version` fails, silently ignore it
+        try:
+            rustc_output = subprocess.check_output(
+                ["rustc", "--version"], stderr=subprocess.STDOUT, timeout=0.5
+            )
+        except Exception:
+            pass
+        else:
+            if rustc_output.startswith(b"rustc "):
+                # The format of `rustc --version` is:
+                # `b'rustc 1.52.1 (9bc8c42bb 2021-05-09)\n'`
+                # We extract just the middle (1.52.1) part
+                data["rustc_version"] = rustc_output.split(b" ")[1].decode()
+
+    # Use None rather than False so as not to give the impression that
+    # pip knows it is not being run under CI.  Rather, it is a null or
+    # inconclusive result.  Also, we include some value rather than no
+    # value to make it easier to know that the check has been run.
+    data["ci"] = True if looks_like_ci() else None
+
+    user_data = os.environ.get("PIP_USER_AGENT_USER_DATA")
+    if user_data is not None:
+        data["user_data"] = user_data
+
+    return "{data[installer][name]}/{data[installer][version]} {json}".format(
+        data=data,
+        json=json.dumps(data, separators=(",", ":"), sort_keys=True),
+    )
+
+
+class LocalFSAdapter(BaseAdapter):
+    def send(
+        self,
+        request: PreparedRequest,
+        stream: bool = False,
+        timeout: Optional[Union[float, Tuple[float, float]]] = None,
+        verify: Union[bool, str] = True,
+        cert: Optional[Union[str, Tuple[str, str]]] = None,
+        proxies: Optional[Mapping[str, str]] = None,
+    ) -> Response:
+        pathname = url_to_path(request.url)
+
+        resp = Response()
+        resp.status_code = 200
+        resp.url = request.url
+
+        try:
+            stats = os.stat(pathname)
+        except OSError as exc:
+            # format the exception raised as a io.BytesIO object,
+            # to return a better error message:
+            resp.status_code = 404
+            resp.reason = type(exc).__name__
+            resp.raw = io.BytesIO(f"{resp.reason}: {exc}".encode("utf8"))
+        else:
+            modified = email.utils.formatdate(stats.st_mtime, usegmt=True)
+            content_type = mimetypes.guess_type(pathname)[0] or "text/plain"
+            resp.headers = CaseInsensitiveDict(
+                {
+                    "Content-Type": content_type,
+                    "Content-Length": stats.st_size,
+                    "Last-Modified": modified,
+                }
+            )
+
+            resp.raw = open(pathname, "rb")
+            resp.close = resp.raw.close
+
+        return resp
+
+    def close(self) -> None:
+        pass
+
+
+class _SSLContextAdapterMixin:
+    """Mixin to add the ``ssl_context`` constructor argument to HTTP adapters.
+
+    The additional argument is forwarded directly to the pool manager. This allows us
+    to dynamically decide what SSL store to use at runtime, which is used to implement
+    the optional ``truststore`` backend.
+    """
+
+    def __init__(
+        self,
+        *,
+        ssl_context: Optional["SSLContext"] = None,
+        **kwargs: Any,
+    ) -> None:
+        self._ssl_context = ssl_context
+        super().__init__(**kwargs)
+
+    def init_poolmanager(
+        self,
+        connections: int,
+        maxsize: int,
+        block: bool = DEFAULT_POOLBLOCK,
+        **pool_kwargs: Any,
+    ) -> "PoolManager":
+        if self._ssl_context is not None:
+            pool_kwargs.setdefault("ssl_context", self._ssl_context)
+        return super().init_poolmanager(  # type: ignore[misc]
+            connections=connections,
+            maxsize=maxsize,
+            block=block,
+            **pool_kwargs,
+        )
+
+
+class HTTPAdapter(_SSLContextAdapterMixin, _BaseHTTPAdapter):
+    pass
+
+
+class CacheControlAdapter(_SSLContextAdapterMixin, _BaseCacheControlAdapter):
+    pass
+
+
+class InsecureHTTPAdapter(HTTPAdapter):
+    def cert_verify(
+        self,
+        conn: ConnectionPool,
+        url: str,
+        verify: Union[bool, str],
+        cert: Optional[Union[str, Tuple[str, str]]],
+    ) -> None:
+        super().cert_verify(conn=conn, url=url, verify=False, cert=cert)
+
+
+class InsecureCacheControlAdapter(CacheControlAdapter):
+    def cert_verify(
+        self,
+        conn: ConnectionPool,
+        url: str,
+        verify: Union[bool, str],
+        cert: Optional[Union[str, Tuple[str, str]]],
+    ) -> None:
+        super().cert_verify(conn=conn, url=url, verify=False, cert=cert)
+
+
+class PipSession(requests.Session):
+
+    timeout: Optional[int] = None
+
+    def __init__(
+        self,
+        *args: Any,
+        retries: int = 0,
+        cache: Optional[str] = None,
+        trusted_hosts: Sequence[str] = (),
+        index_urls: Optional[List[str]] = None,
+        ssl_context: Optional["SSLContext"] = None,
+        **kwargs: Any,
+    ) -> None:
+        """
+        :param trusted_hosts: Domains not to emit warnings for when not using
+            HTTPS.
+        """
+        super().__init__(*args, **kwargs)
+
+        # Namespace the attribute with "pip_" just in case to prevent
+        # possible conflicts with the base class.
+        self.pip_trusted_origins: List[Tuple[str, Optional[int]]] = []
+
+        # Attach our User Agent to the request
+        self.headers["User-Agent"] = user_agent()
+
+        # Attach our Authentication handler to the session
+        self.auth = MultiDomainBasicAuth(index_urls=index_urls)
+
+        # Create our urllib3.Retry instance which will allow us to customize
+        # how we handle retries.
+        retries = urllib3.Retry(
+            # Set the total number of retries that a particular request can
+            # have.
+            total=retries,
+            # A 503 error from PyPI typically means that the Fastly -> Origin
+            # connection got interrupted in some way. A 503 error in general
+            # is typically considered a transient error so we'll go ahead and
+            # retry it.
+            # A 500 may indicate transient error in Amazon S3
+            # A 520 or 527 - may indicate transient error in CloudFlare
+            status_forcelist=[500, 503, 520, 527],
+            # Add a small amount of back off between failed requests in
+            # order to prevent hammering the service.
+            backoff_factor=0.25,
+        )  # type: ignore
+
+        # Our Insecure HTTPAdapter disables HTTPS validation. It does not
+        # support caching so we'll use it for all http:// URLs.
+        # If caching is disabled, we will also use it for
+        # https:// hosts that we've marked as ignoring
+        # TLS errors for (trusted-hosts).
+        insecure_adapter = InsecureHTTPAdapter(max_retries=retries)
+
+        # We want to _only_ cache responses on securely fetched origins or when
+        # the host is specified as trusted. We do this because
+        # we can't validate the response of an insecurely/untrusted fetched
+        # origin, and we don't want someone to be able to poison the cache and
+        # require manual eviction from the cache to fix it.
+        if cache:
+            secure_adapter = CacheControlAdapter(
+                cache=SafeFileCache(cache),
+                max_retries=retries,
+                ssl_context=ssl_context,
+            )
+            self._trusted_host_adapter = InsecureCacheControlAdapter(
+                cache=SafeFileCache(cache),
+                max_retries=retries,
+            )
+        else:
+            secure_adapter = HTTPAdapter(max_retries=retries, ssl_context=ssl_context)
+            self._trusted_host_adapter = insecure_adapter
+
+        self.mount("https://", secure_adapter)
+        self.mount("http://", insecure_adapter)
+
+        # Enable file:// urls
+        self.mount("file://", LocalFSAdapter())
+
+        for host in trusted_hosts:
+            self.add_trusted_host(host, suppress_logging=True)
+
+    def update_index_urls(self, new_index_urls: List[str]) -> None:
+        """
+        :param new_index_urls: New index urls to update the authentication
+            handler with.
+        """
+        self.auth.index_urls = new_index_urls
+
+    def add_trusted_host(
+        self, host: str, source: Optional[str] = None, suppress_logging: bool = False
+    ) -> None:
+        """
+        :param host: It is okay to provide a host that has previously been
+            added.
+        :param source: An optional source string, for logging where the host
+            string came from.
+        """
+        if not suppress_logging:
+            msg = f"adding trusted host: {host!r}"
+            if source is not None:
+                msg += f" (from {source})"
+            logger.info(msg)
+
+        host_port = parse_netloc(host)
+        if host_port not in self.pip_trusted_origins:
+            self.pip_trusted_origins.append(host_port)
+
+        self.mount(
+            build_url_from_netloc(host, scheme="http") + "/", self._trusted_host_adapter
+        )
+        self.mount(build_url_from_netloc(host) + "/", self._trusted_host_adapter)
+        if not host_port[1]:
+            self.mount(
+                build_url_from_netloc(host, scheme="http") + ":",
+                self._trusted_host_adapter,
+            )
+            # Mount wildcard ports for the same host.
+            self.mount(build_url_from_netloc(host) + ":", self._trusted_host_adapter)
+
+    def iter_secure_origins(self) -> Generator[SecureOrigin, None, None]:
+        yield from SECURE_ORIGINS
+        for host, port in self.pip_trusted_origins:
+            yield ("*", host, "*" if port is None else port)
+
+    def is_secure_origin(self, location: Link) -> bool:
+        # Determine if this url used a secure transport mechanism
+        parsed = urllib.parse.urlparse(str(location))
+        origin_protocol, origin_host, origin_port = (
+            parsed.scheme,
+            parsed.hostname,
+            parsed.port,
+        )
+
+        # The protocol to use to see if the protocol matches.
+        # Don't count the repository type as part of the protocol: in
+        # cases such as "git+ssh", only use "ssh". (I.e., Only verify against
+        # the last scheme.)
+        origin_protocol = origin_protocol.rsplit("+", 1)[-1]
+
+        # Determine if our origin is a secure origin by looking through our
+        # hardcoded list of secure origins, as well as any additional ones
+        # configured on this PackageFinder instance.
+        for secure_origin in self.iter_secure_origins():
+            secure_protocol, secure_host, secure_port = secure_origin
+            if origin_protocol != secure_protocol and secure_protocol != "*":
+                continue
+
+            try:
+                addr = ipaddress.ip_address(origin_host or "")
+                network = ipaddress.ip_network(secure_host)
+            except ValueError:
+                # We don't have both a valid address or a valid network, so
+                # we'll check this origin against hostnames.
+                if (
+                    origin_host
+                    and origin_host.lower() != secure_host.lower()
+                    and secure_host != "*"
+                ):
+                    continue
+            else:
+                # We have a valid address and network, so see if the address
+                # is contained within the network.
+                if addr not in network:
+                    continue
+
+            # Check to see if the port matches.
+            if (
+                origin_port != secure_port
+                and secure_port != "*"
+                and secure_port is not None
+            ):
+                continue
+
+            # If we've gotten here, then this origin matches the current
+            # secure origin and we should return True
+            return True
+
+        # If we've gotten to this point, then the origin isn't secure and we
+        # will not accept it as a valid location to search. We will however
+        # log a warning that we are ignoring it.
+        logger.warning(
+            "The repository located at %s is not a trusted or secure host and "
+            "is being ignored. If this repository is available via HTTPS we "
+            "recommend you use HTTPS instead, otherwise you may silence "
+            "this warning and allow it anyway with '--trusted-host %s'.",
+            origin_host,
+            origin_host,
+        )
+
+        return False
+
+    def request(self, method: str, url: str, *args: Any, **kwargs: Any) -> Response:
+        # Allow setting a default timeout on a session
+        kwargs.setdefault("timeout", self.timeout)
+        # Allow setting a default proxies on a session
+        kwargs.setdefault("proxies", self.proxies)
+
+        # Dispatch the actual request
+        return super().request(method, url, *args, **kwargs)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/utils.py b/venv/lib/python3.9/site-packages/pip/_internal/network/utils.py
new file mode 100644
index 0000000..134848a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/utils.py
@@ -0,0 +1,96 @@
+from typing import Dict, Generator
+
+from pip._vendor.requests.models import CONTENT_CHUNK_SIZE, Response
+
+from pip._internal.exceptions import NetworkConnectionError
+
+# The following comments and HTTP headers were originally added by
+# Donald Stufft in git commit 22c562429a61bb77172039e480873fb239dd8c03.
+#
+# We use Accept-Encoding: identity here because requests defaults to
+# accepting compressed responses. This breaks in a variety of ways
+# depending on how the server is configured.
+# - Some servers will notice that the file isn't a compressible file
+#   and will leave the file alone and with an empty Content-Encoding
+# - Some servers will notice that the file is already compressed and
+#   will leave the file alone, adding a Content-Encoding: gzip header
+# - Some servers won't notice anything at all and will take a file
+#   that's already been compressed and compress it again, and set
+#   the Content-Encoding: gzip header
+# By setting this to request only the identity encoding we're hoping
+# to eliminate the third case.  Hopefully there does not exist a server
+# which when given a file will notice it is already compressed and that
+# you're not asking for a compressed file and will then decompress it
+# before sending because if that's the case I don't think it'll ever be
+# possible to make this work.
+HEADERS: Dict[str, str] = {"Accept-Encoding": "identity"}
+
+
+def raise_for_status(resp: Response) -> None:
+    http_error_msg = ""
+    if isinstance(resp.reason, bytes):
+        # We attempt to decode utf-8 first because some servers
+        # choose to localize their reason strings. If the string
+        # isn't utf-8, we fall back to iso-8859-1 for all other
+        # encodings.
+        try:
+            reason = resp.reason.decode("utf-8")
+        except UnicodeDecodeError:
+            reason = resp.reason.decode("iso-8859-1")
+    else:
+        reason = resp.reason
+
+    if 400 <= resp.status_code < 500:
+        http_error_msg = (
+            f"{resp.status_code} Client Error: {reason} for url: {resp.url}"
+        )
+
+    elif 500 <= resp.status_code < 600:
+        http_error_msg = (
+            f"{resp.status_code} Server Error: {reason} for url: {resp.url}"
+        )
+
+    if http_error_msg:
+        raise NetworkConnectionError(http_error_msg, response=resp)
+
+
+def response_chunks(
+    response: Response, chunk_size: int = CONTENT_CHUNK_SIZE
+) -> Generator[bytes, None, None]:
+    """Given a requests Response, provide the data chunks."""
+    try:
+        # Special case for urllib3.
+        for chunk in response.raw.stream(
+            chunk_size,
+            # We use decode_content=False here because we don't
+            # want urllib3 to mess with the raw bytes we get
+            # from the server. If we decompress inside of
+            # urllib3 then we cannot verify the checksum
+            # because the checksum will be of the compressed
+            # file. This breakage will only occur if the
+            # server adds a Content-Encoding header, which
+            # depends on how the server was configured:
+            # - Some servers will notice that the file isn't a
+            #   compressible file and will leave the file alone
+            #   and with an empty Content-Encoding
+            # - Some servers will notice that the file is
+            #   already compressed and will leave the file
+            #   alone and will add a Content-Encoding: gzip
+            #   header
+            # - Some servers won't notice anything at all and
+            #   will take a file that's already been compressed
+            #   and compress it again and set the
+            #   Content-Encoding: gzip header
+            #
+            # By setting this not to decode automatically we
+            # hope to eliminate problems with the second case.
+            decode_content=False,
+        ):
+            yield chunk
+    except AttributeError:
+        # Standard file-like object.
+        while True:
+            chunk = response.raw.read(chunk_size)
+            if not chunk:
+                break
+            yield chunk
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/network/xmlrpc.py b/venv/lib/python3.9/site-packages/pip/_internal/network/xmlrpc.py
new file mode 100644
index 0000000..4a7d55d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/network/xmlrpc.py
@@ -0,0 +1,60 @@
+"""xmlrpclib.Transport implementation
+"""
+
+import logging
+import urllib.parse
+import xmlrpc.client
+from typing import TYPE_CHECKING, Tuple
+
+from pip._internal.exceptions import NetworkConnectionError
+from pip._internal.network.session import PipSession
+from pip._internal.network.utils import raise_for_status
+
+if TYPE_CHECKING:
+    from xmlrpc.client import _HostType, _Marshallable
+
+logger = logging.getLogger(__name__)
+
+
+class PipXmlrpcTransport(xmlrpc.client.Transport):
+    """Provide a `xmlrpclib.Transport` implementation via a `PipSession`
+    object.
+    """
+
+    def __init__(
+        self, index_url: str, session: PipSession, use_datetime: bool = False
+    ) -> None:
+        super().__init__(use_datetime)
+        index_parts = urllib.parse.urlparse(index_url)
+        self._scheme = index_parts.scheme
+        self._session = session
+
+    def request(
+        self,
+        host: "_HostType",
+        handler: str,
+        request_body: bytes,
+        verbose: bool = False,
+    ) -> Tuple["_Marshallable", ...]:
+        assert isinstance(host, str)
+        parts = (self._scheme, host, handler, None, None, None)
+        url = urllib.parse.urlunparse(parts)
+        try:
+            headers = {"Content-Type": "text/xml"}
+            response = self._session.post(
+                url,
+                data=request_body,
+                headers=headers,
+                stream=True,
+            )
+            raise_for_status(response)
+            self.verbose = verbose
+            return self.parse_response(response.raw)
+        except NetworkConnectionError as exc:
+            assert exc.response
+            logger.critical(
+                "HTTP error %s while getting %s",
+                exc.response.status_code,
+                url,
+            )
+            raise
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/__pycache__/wheel_legacy.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/__pycache__/wheel_legacy.cpython-39.pyc
new file mode 100644
index 0000000..066ca38
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/__pycache__/wheel_legacy.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/build_tracker.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/build_tracker.py
new file mode 100644
index 0000000..6621549
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/build_tracker.py
@@ -0,0 +1,124 @@
+import contextlib
+import hashlib
+import logging
+import os
+from types import TracebackType
+from typing import Dict, Generator, Optional, Set, Type, Union
+
+from pip._internal.models.link import Link
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+@contextlib.contextmanager
+def update_env_context_manager(**changes: str) -> Generator[None, None, None]:
+    target = os.environ
+
+    # Save values from the target and change them.
+    non_existent_marker = object()
+    saved_values: Dict[str, Union[object, str]] = {}
+    for name, new_value in changes.items():
+        try:
+            saved_values[name] = target[name]
+        except KeyError:
+            saved_values[name] = non_existent_marker
+        target[name] = new_value
+
+    try:
+        yield
+    finally:
+        # Restore original values in the target.
+        for name, original_value in saved_values.items():
+            if original_value is non_existent_marker:
+                del target[name]
+            else:
+                assert isinstance(original_value, str)  # for mypy
+                target[name] = original_value
+
+
+@contextlib.contextmanager
+def get_build_tracker() -> Generator["BuildTracker", None, None]:
+    root = os.environ.get("PIP_BUILD_TRACKER")
+    with contextlib.ExitStack() as ctx:
+        if root is None:
+            root = ctx.enter_context(TempDirectory(kind="build-tracker")).path
+            ctx.enter_context(update_env_context_manager(PIP_BUILD_TRACKER=root))
+            logger.debug("Initialized build tracking at %s", root)
+
+        with BuildTracker(root) as tracker:
+            yield tracker
+
+
+class BuildTracker:
+    def __init__(self, root: str) -> None:
+        self._root = root
+        self._entries: Set[InstallRequirement] = set()
+        logger.debug("Created build tracker: %s", self._root)
+
+    def __enter__(self) -> "BuildTracker":
+        logger.debug("Entered build tracker: %s", self._root)
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.cleanup()
+
+    def _entry_path(self, link: Link) -> str:
+        hashed = hashlib.sha224(link.url_without_fragment.encode()).hexdigest()
+        return os.path.join(self._root, hashed)
+
+    def add(self, req: InstallRequirement) -> None:
+        """Add an InstallRequirement to build tracking."""
+
+        assert req.link
+        # Get the file to write information about this requirement.
+        entry_path = self._entry_path(req.link)
+
+        # Try reading from the file. If it exists and can be read from, a build
+        # is already in progress, so a LookupError is raised.
+        try:
+            with open(entry_path) as fp:
+                contents = fp.read()
+        except FileNotFoundError:
+            pass
+        else:
+            message = "{} is already being built: {}".format(req.link, contents)
+            raise LookupError(message)
+
+        # If we're here, req should really not be building already.
+        assert req not in self._entries
+
+        # Start tracking this requirement.
+        with open(entry_path, "w", encoding="utf-8") as fp:
+            fp.write(str(req))
+        self._entries.add(req)
+
+        logger.debug("Added %s to build tracker %r", req, self._root)
+
+    def remove(self, req: InstallRequirement) -> None:
+        """Remove an InstallRequirement from build tracking."""
+
+        assert req.link
+        # Delete the created file and the corresponding entries.
+        os.unlink(self._entry_path(req.link))
+        self._entries.remove(req)
+
+        logger.debug("Removed %s from build tracker %r", req, self._root)
+
+    def cleanup(self) -> None:
+        for req in set(self._entries):
+            self.remove(req)
+
+        logger.debug("Removed build tracker: %r", self._root)
+
+    @contextlib.contextmanager
+    def track(self, req: InstallRequirement) -> Generator[None, None, None]:
+        self.add(req)
+        yield
+        self.remove(req)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata.py
new file mode 100644
index 0000000..e2b7b44
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata.py
@@ -0,0 +1,39 @@
+"""Metadata generation logic for source distributions.
+"""
+
+import os
+
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.exceptions import (
+    InstallationSubprocessError,
+    MetadataGenerationFailed,
+)
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+
+
+def generate_metadata(
+    build_env: BuildEnvironment, backend: Pep517HookCaller, details: str
+) -> str:
+    """Generate metadata using mechanisms described in PEP 517.
+
+    Returns the generated metadata directory.
+    """
+    metadata_tmpdir = TempDirectory(kind="modern-metadata", globally_managed=True)
+
+    metadata_dir = metadata_tmpdir.path
+
+    with build_env:
+        # Note that Pep517HookCaller implements a fallback for
+        # prepare_metadata_for_build_wheel, so we don't have to
+        # consider the possibility that this hook doesn't exist.
+        runner = runner_with_spinner_message("Preparing metadata (pyproject.toml)")
+        with backend.subprocess_runner(runner):
+            try:
+                distinfo_dir = backend.prepare_metadata_for_build_wheel(metadata_dir)
+            except InstallationSubprocessError as error:
+                raise MetadataGenerationFailed(package_details=details) from error
+
+    return os.path.join(metadata_dir, distinfo_dir)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_editable.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_editable.py
new file mode 100644
index 0000000..4c3f48b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_editable.py
@@ -0,0 +1,41 @@
+"""Metadata generation logic for source distributions.
+"""
+
+import os
+
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.exceptions import (
+    InstallationSubprocessError,
+    MetadataGenerationFailed,
+)
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+
+
+def generate_editable_metadata(
+    build_env: BuildEnvironment, backend: Pep517HookCaller, details: str
+) -> str:
+    """Generate metadata using mechanisms described in PEP 660.
+
+    Returns the generated metadata directory.
+    """
+    metadata_tmpdir = TempDirectory(kind="modern-metadata", globally_managed=True)
+
+    metadata_dir = metadata_tmpdir.path
+
+    with build_env:
+        # Note that Pep517HookCaller implements a fallback for
+        # prepare_metadata_for_build_wheel/editable, so we don't have to
+        # consider the possibility that this hook doesn't exist.
+        runner = runner_with_spinner_message(
+            "Preparing editable metadata (pyproject.toml)"
+        )
+        with backend.subprocess_runner(runner):
+            try:
+                distinfo_dir = backend.prepare_metadata_for_build_editable(metadata_dir)
+            except InstallationSubprocessError as error:
+                raise MetadataGenerationFailed(package_details=details) from error
+
+    return os.path.join(metadata_dir, distinfo_dir)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_legacy.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_legacy.py
new file mode 100644
index 0000000..e60988d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/metadata_legacy.py
@@ -0,0 +1,74 @@
+"""Metadata generation logic for legacy source distributions.
+"""
+
+import logging
+import os
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.exceptions import (
+    InstallationError,
+    InstallationSubprocessError,
+    MetadataGenerationFailed,
+)
+from pip._internal.utils.setuptools_build import make_setuptools_egg_info_args
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+def _find_egg_info(directory: str) -> str:
+    """Find an .egg-info subdirectory in `directory`."""
+    filenames = [f for f in os.listdir(directory) if f.endswith(".egg-info")]
+
+    if not filenames:
+        raise InstallationError(f"No .egg-info directory found in {directory}")
+
+    if len(filenames) > 1:
+        raise InstallationError(
+            "More than one .egg-info directory found in {}".format(directory)
+        )
+
+    return os.path.join(directory, filenames[0])
+
+
+def generate_metadata(
+    build_env: BuildEnvironment,
+    setup_py_path: str,
+    source_dir: str,
+    isolated: bool,
+    details: str,
+) -> str:
+    """Generate metadata using setup.py-based defacto mechanisms.
+
+    Returns the generated metadata directory.
+    """
+    logger.debug(
+        "Running setup.py (path:%s) egg_info for package %s",
+        setup_py_path,
+        details,
+    )
+
+    egg_info_dir = TempDirectory(kind="pip-egg-info", globally_managed=True).path
+
+    args = make_setuptools_egg_info_args(
+        setup_py_path,
+        egg_info_dir=egg_info_dir,
+        no_user_config=isolated,
+    )
+
+    with build_env:
+        with open_spinner("Preparing metadata (setup.py)") as spinner:
+            try:
+                call_subprocess(
+                    args,
+                    cwd=source_dir,
+                    command_desc="python setup.py egg_info",
+                    spinner=spinner,
+                )
+            except InstallationSubprocessError as error:
+                raise MetadataGenerationFailed(package_details=details) from error
+
+    # Return the .egg-info directory.
+    return _find_egg_info(egg_info_dir)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel.py
new file mode 100644
index 0000000..b0d2fc9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel.py
@@ -0,0 +1,37 @@
+import logging
+import os
+from typing import Optional
+
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal.utils.subprocess import runner_with_spinner_message
+
+logger = logging.getLogger(__name__)
+
+
+def build_wheel_pep517(
+    name: str,
+    backend: Pep517HookCaller,
+    metadata_directory: str,
+    tempd: str,
+) -> Optional[str]:
+    """Build one InstallRequirement using the PEP 517 build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    assert metadata_directory is not None
+    try:
+        logger.debug("Destination directory: %s", tempd)
+
+        runner = runner_with_spinner_message(
+            f"Building wheel for {name} (pyproject.toml)"
+        )
+        with backend.subprocess_runner(runner):
+            wheel_name = backend.build_wheel(
+                tempd,
+                metadata_directory=metadata_directory,
+            )
+    except Exception:
+        logger.error("Failed building wheel for %s", name)
+        return None
+    return os.path.join(tempd, wheel_name)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_editable.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_editable.py
new file mode 100644
index 0000000..cf7b01a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_editable.py
@@ -0,0 +1,46 @@
+import logging
+import os
+from typing import Optional
+
+from pip._vendor.pep517.wrappers import HookMissing, Pep517HookCaller
+
+from pip._internal.utils.subprocess import runner_with_spinner_message
+
+logger = logging.getLogger(__name__)
+
+
+def build_wheel_editable(
+    name: str,
+    backend: Pep517HookCaller,
+    metadata_directory: str,
+    tempd: str,
+) -> Optional[str]:
+    """Build one InstallRequirement using the PEP 660 build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    assert metadata_directory is not None
+    try:
+        logger.debug("Destination directory: %s", tempd)
+
+        runner = runner_with_spinner_message(
+            f"Building editable for {name} (pyproject.toml)"
+        )
+        with backend.subprocess_runner(runner):
+            try:
+                wheel_name = backend.build_editable(
+                    tempd,
+                    metadata_directory=metadata_directory,
+                )
+            except HookMissing as e:
+                logger.error(
+                    "Cannot build editable %s because the build "
+                    "backend does not have the %s hook",
+                    name,
+                    e,
+                )
+                return None
+    except Exception:
+        logger.error("Failed building editable for %s", name)
+        return None
+    return os.path.join(tempd, wheel_name)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_legacy.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_legacy.py
new file mode 100644
index 0000000..c5f0492
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/build/wheel_legacy.py
@@ -0,0 +1,102 @@
+import logging
+import os.path
+from typing import List, Optional
+
+from pip._internal.cli.spinners import open_spinner
+from pip._internal.utils.setuptools_build import make_setuptools_bdist_wheel_args
+from pip._internal.utils.subprocess import call_subprocess, format_command_args
+
+logger = logging.getLogger(__name__)
+
+
+def format_command_result(
+    command_args: List[str],
+    command_output: str,
+) -> str:
+    """Format command information for logging."""
+    command_desc = format_command_args(command_args)
+    text = f"Command arguments: {command_desc}\n"
+
+    if not command_output:
+        text += "Command output: None"
+    elif logger.getEffectiveLevel() > logging.DEBUG:
+        text += "Command output: [use --verbose to show]"
+    else:
+        if not command_output.endswith("\n"):
+            command_output += "\n"
+        text += f"Command output:\n{command_output}"
+
+    return text
+
+
+def get_legacy_build_wheel_path(
+    names: List[str],
+    temp_dir: str,
+    name: str,
+    command_args: List[str],
+    command_output: str,
+) -> Optional[str]:
+    """Return the path to the wheel in the temporary build directory."""
+    # Sort for determinism.
+    names = sorted(names)
+    if not names:
+        msg = ("Legacy build of wheel for {!r} created no files.\n").format(name)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+        return None
+
+    if len(names) > 1:
+        msg = (
+            "Legacy build of wheel for {!r} created more than one file.\n"
+            "Filenames (choosing first): {}\n"
+        ).format(name, names)
+        msg += format_command_result(command_args, command_output)
+        logger.warning(msg)
+
+    return os.path.join(temp_dir, names[0])
+
+
+def build_wheel_legacy(
+    name: str,
+    setup_py_path: str,
+    source_dir: str,
+    global_options: List[str],
+    build_options: List[str],
+    tempd: str,
+) -> Optional[str]:
+    """Build one unpacked package using the "legacy" build process.
+
+    Returns path to wheel if successfully built. Otherwise, returns None.
+    """
+    wheel_args = make_setuptools_bdist_wheel_args(
+        setup_py_path,
+        global_options=global_options,
+        build_options=build_options,
+        destination_dir=tempd,
+    )
+
+    spin_message = f"Building wheel for {name} (setup.py)"
+    with open_spinner(spin_message) as spinner:
+        logger.debug("Destination directory: %s", tempd)
+
+        try:
+            output = call_subprocess(
+                wheel_args,
+                command_desc="python setup.py bdist_wheel",
+                cwd=source_dir,
+                spinner=spinner,
+            )
+        except Exception:
+            spinner.finish("error")
+            logger.error("Failed building wheel for %s", name)
+            return None
+
+        names = os.listdir(tempd)
+        wheel_path = get_legacy_build_wheel_path(
+            names=names,
+            temp_dir=tempd,
+            name=name,
+            command_args=wheel_args,
+            command_output=output,
+        )
+        return wheel_path
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/check.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/check.py
new file mode 100644
index 0000000..fb3ac8b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/check.py
@@ -0,0 +1,149 @@
+"""Validation of dependencies of packages
+"""
+
+import logging
+from typing import Callable, Dict, List, NamedTuple, Optional, Set, Tuple
+
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+
+from pip._internal.distributions import make_distribution_for_install_requirement
+from pip._internal.metadata import get_default_environment
+from pip._internal.metadata.base import DistributionVersion
+from pip._internal.req.req_install import InstallRequirement
+
+logger = logging.getLogger(__name__)
+
+
+class PackageDetails(NamedTuple):
+    version: DistributionVersion
+    dependencies: List[Requirement]
+
+
+# Shorthands
+PackageSet = Dict[NormalizedName, PackageDetails]
+Missing = Tuple[NormalizedName, Requirement]
+Conflicting = Tuple[NormalizedName, DistributionVersion, Requirement]
+
+MissingDict = Dict[NormalizedName, List[Missing]]
+ConflictingDict = Dict[NormalizedName, List[Conflicting]]
+CheckResult = Tuple[MissingDict, ConflictingDict]
+ConflictDetails = Tuple[PackageSet, CheckResult]
+
+
+def create_package_set_from_installed() -> Tuple[PackageSet, bool]:
+    """Converts a list of distributions into a PackageSet."""
+    package_set = {}
+    problems = False
+    env = get_default_environment()
+    for dist in env.iter_installed_distributions(local_only=False, skip=()):
+        name = dist.canonical_name
+        try:
+            dependencies = list(dist.iter_dependencies())
+            package_set[name] = PackageDetails(dist.version, dependencies)
+        except (OSError, ValueError) as e:
+            # Don't crash on unreadable or broken metadata.
+            logger.warning("Error parsing requirements for %s: %s", name, e)
+            problems = True
+    return package_set, problems
+
+
+def check_package_set(
+    package_set: PackageSet, should_ignore: Optional[Callable[[str], bool]] = None
+) -> CheckResult:
+    """Check if a package set is consistent
+
+    If should_ignore is passed, it should be a callable that takes a
+    package name and returns a boolean.
+    """
+
+    missing = {}
+    conflicting = {}
+
+    for package_name, package_detail in package_set.items():
+        # Info about dependencies of package_name
+        missing_deps: Set[Missing] = set()
+        conflicting_deps: Set[Conflicting] = set()
+
+        if should_ignore and should_ignore(package_name):
+            continue
+
+        for req in package_detail.dependencies:
+            name = canonicalize_name(req.name)
+
+            # Check if it's missing
+            if name not in package_set:
+                missed = True
+                if req.marker is not None:
+                    missed = req.marker.evaluate()
+                if missed:
+                    missing_deps.add((name, req))
+                continue
+
+            # Check if there's a conflict
+            version = package_set[name].version
+            if not req.specifier.contains(version, prereleases=True):
+                conflicting_deps.add((name, version, req))
+
+        if missing_deps:
+            missing[package_name] = sorted(missing_deps, key=str)
+        if conflicting_deps:
+            conflicting[package_name] = sorted(conflicting_deps, key=str)
+
+    return missing, conflicting
+
+
+def check_install_conflicts(to_install: List[InstallRequirement]) -> ConflictDetails:
+    """For checking if the dependency graph would be consistent after \
+    installing given requirements
+    """
+    # Start from the current state
+    package_set, _ = create_package_set_from_installed()
+    # Install packages
+    would_be_installed = _simulate_installation_of(to_install, package_set)
+
+    # Only warn about directly-dependent packages; create a whitelist of them
+    whitelist = _create_whitelist(would_be_installed, package_set)
+
+    return (
+        package_set,
+        check_package_set(
+            package_set, should_ignore=lambda name: name not in whitelist
+        ),
+    )
+
+
+def _simulate_installation_of(
+    to_install: List[InstallRequirement], package_set: PackageSet
+) -> Set[NormalizedName]:
+    """Computes the version of packages after installing to_install."""
+    # Keep track of packages that were installed
+    installed = set()
+
+    # Modify it as installing requirement_set would (assuming no errors)
+    for inst_req in to_install:
+        abstract_dist = make_distribution_for_install_requirement(inst_req)
+        dist = abstract_dist.get_metadata_distribution()
+        name = dist.canonical_name
+        package_set[name] = PackageDetails(dist.version, list(dist.iter_dependencies()))
+
+        installed.add(name)
+
+    return installed
+
+
+def _create_whitelist(
+    would_be_installed: Set[NormalizedName], package_set: PackageSet
+) -> Set[NormalizedName]:
+    packages_affected = set(would_be_installed)
+
+    for package_name in package_set:
+        if package_name in packages_affected:
+            continue
+
+        for req in package_set[package_name].dependencies:
+            if canonicalize_name(req.name) in packages_affected:
+                packages_affected.add(package_name)
+                break
+
+    return packages_affected
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/freeze.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/freeze.py
new file mode 100644
index 0000000..930d4c6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/freeze.py
@@ -0,0 +1,254 @@
+import collections
+import logging
+import os
+from typing import Container, Dict, Generator, Iterable, List, NamedTuple, Optional, Set
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import Version
+
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.metadata import BaseDistribution, get_environment
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+)
+from pip._internal.req.req_file import COMMENT_RE
+from pip._internal.utils.direct_url_helpers import direct_url_as_pep440_direct_reference
+
+logger = logging.getLogger(__name__)
+
+
+class _EditableInfo(NamedTuple):
+    requirement: str
+    comments: List[str]
+
+
+def freeze(
+    requirement: Optional[List[str]] = None,
+    local_only: bool = False,
+    user_only: bool = False,
+    paths: Optional[List[str]] = None,
+    isolated: bool = False,
+    exclude_editable: bool = False,
+    skip: Container[str] = (),
+) -> Generator[str, None, None]:
+    installations: Dict[str, FrozenRequirement] = {}
+
+    dists = get_environment(paths).iter_installed_distributions(
+        local_only=local_only,
+        skip=(),
+        user_only=user_only,
+    )
+    for dist in dists:
+        req = FrozenRequirement.from_dist(dist)
+        if exclude_editable and req.editable:
+            continue
+        installations[req.canonical_name] = req
+
+    if requirement:
+        # the options that don't get turned into an InstallRequirement
+        # should only be emitted once, even if the same option is in multiple
+        # requirements files, so we need to keep track of what has been emitted
+        # so that we don't emit it again if it's seen again
+        emitted_options: Set[str] = set()
+        # keep track of which files a requirement is in so that we can
+        # give an accurate warning if a requirement appears multiple times.
+        req_files: Dict[str, List[str]] = collections.defaultdict(list)
+        for req_file_path in requirement:
+            with open(req_file_path) as req_file:
+                for line in req_file:
+                    if (
+                        not line.strip()
+                        or line.strip().startswith("#")
+                        or line.startswith(
+                            (
+                                "-r",
+                                "--requirement",
+                                "-f",
+                                "--find-links",
+                                "-i",
+                                "--index-url",
+                                "--pre",
+                                "--trusted-host",
+                                "--process-dependency-links",
+                                "--extra-index-url",
+                                "--use-feature",
+                            )
+                        )
+                    ):
+                        line = line.rstrip()
+                        if line not in emitted_options:
+                            emitted_options.add(line)
+                            yield line
+                        continue
+
+                    if line.startswith("-e") or line.startswith("--editable"):
+                        if line.startswith("-e"):
+                            line = line[2:].strip()
+                        else:
+                            line = line[len("--editable") :].strip().lstrip("=")
+                        line_req = install_req_from_editable(
+                            line,
+                            isolated=isolated,
+                        )
+                    else:
+                        line_req = install_req_from_line(
+                            COMMENT_RE.sub("", line).strip(),
+                            isolated=isolated,
+                        )
+
+                    if not line_req.name:
+                        logger.info(
+                            "Skipping line in requirement file [%s] because "
+                            "it's not clear what it would install: %s",
+                            req_file_path,
+                            line.strip(),
+                        )
+                        logger.info(
+                            "  (add #egg=PackageName to the URL to avoid"
+                            " this warning)"
+                        )
+                    else:
+                        line_req_canonical_name = canonicalize_name(line_req.name)
+                        if line_req_canonical_name not in installations:
+                            # either it's not installed, or it is installed
+                            # but has been processed already
+                            if not req_files[line_req.name]:
+                                logger.warning(
+                                    "Requirement file [%s] contains %s, but "
+                                    "package %r is not installed",
+                                    req_file_path,
+                                    COMMENT_RE.sub("", line).strip(),
+                                    line_req.name,
+                                )
+                            else:
+                                req_files[line_req.name].append(req_file_path)
+                        else:
+                            yield str(installations[line_req_canonical_name]).rstrip()
+                            del installations[line_req_canonical_name]
+                            req_files[line_req.name].append(req_file_path)
+
+        # Warn about requirements that were included multiple times (in a
+        # single requirements file or in different requirements files).
+        for name, files in req_files.items():
+            if len(files) > 1:
+                logger.warning(
+                    "Requirement %s included multiple times [%s]",
+                    name,
+                    ", ".join(sorted(set(files))),
+                )
+
+        yield ("## The following requirements were added by pip freeze:")
+    for installation in sorted(installations.values(), key=lambda x: x.name.lower()):
+        if installation.canonical_name not in skip:
+            yield str(installation).rstrip()
+
+
+def _format_as_name_version(dist: BaseDistribution) -> str:
+    if isinstance(dist.version, Version):
+        return f"{dist.raw_name}=={dist.version}"
+    return f"{dist.raw_name}==={dist.version}"
+
+
+def _get_editable_info(dist: BaseDistribution) -> _EditableInfo:
+    """
+    Compute and return values (req, comments) for use in
+    FrozenRequirement.from_dist().
+    """
+    editable_project_location = dist.editable_project_location
+    assert editable_project_location
+    location = os.path.normcase(os.path.abspath(editable_project_location))
+
+    from pip._internal.vcs import RemoteNotFoundError, RemoteNotValidError, vcs
+
+    vcs_backend = vcs.get_backend_for_dir(location)
+
+    if vcs_backend is None:
+        display = _format_as_name_version(dist)
+        logger.debug(
+            'No VCS found for editable requirement "%s" in: %r',
+            display,
+            location,
+        )
+        return _EditableInfo(
+            requirement=location,
+            comments=[f"# Editable install with no version control ({display})"],
+        )
+
+    vcs_name = type(vcs_backend).__name__
+
+    try:
+        req = vcs_backend.get_src_requirement(location, dist.raw_name)
+    except RemoteNotFoundError:
+        display = _format_as_name_version(dist)
+        return _EditableInfo(
+            requirement=location,
+            comments=[f"# Editable {vcs_name} install with no remote ({display})"],
+        )
+    except RemoteNotValidError as ex:
+        display = _format_as_name_version(dist)
+        return _EditableInfo(
+            requirement=location,
+            comments=[
+                f"# Editable {vcs_name} install ({display}) with either a deleted "
+                f"local remote or invalid URI:",
+                f"# '{ex.url}'",
+            ],
+        )
+    except BadCommand:
+        logger.warning(
+            "cannot determine version of editable source in %s "
+            "(%s command not found in path)",
+            location,
+            vcs_backend.name,
+        )
+        return _EditableInfo(requirement=location, comments=[])
+    except InstallationError as exc:
+        logger.warning("Error when trying to get requirement for VCS system %s", exc)
+    else:
+        return _EditableInfo(requirement=req, comments=[])
+
+    logger.warning("Could not determine repository location of %s", location)
+
+    return _EditableInfo(
+        requirement=location,
+        comments=["## !! Could not determine repository location"],
+    )
+
+
+class FrozenRequirement:
+    def __init__(
+        self,
+        name: str,
+        req: str,
+        editable: bool,
+        comments: Iterable[str] = (),
+    ) -> None:
+        self.name = name
+        self.canonical_name = canonicalize_name(name)
+        self.req = req
+        self.editable = editable
+        self.comments = comments
+
+    @classmethod
+    def from_dist(cls, dist: BaseDistribution) -> "FrozenRequirement":
+        editable = dist.editable
+        if editable:
+            req, comments = _get_editable_info(dist)
+        else:
+            comments = []
+            direct_url = dist.direct_url
+            if direct_url:
+                # if PEP 610 metadata is present, use it
+                req = direct_url_as_pep440_direct_reference(direct_url, dist.raw_name)
+            else:
+                # name==version requirement
+                req = _format_as_name_version(dist)
+
+        return cls(dist.raw_name, req, editable, comments=comments)
+
+    def __str__(self) -> str:
+        req = self.req
+        if self.editable:
+            req = f"-e {req}"
+        return "\n".join(list(self.comments) + [str(req)]) + "\n"
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__init__.py
new file mode 100644
index 0000000..24d6a5d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__init__.py
@@ -0,0 +1,2 @@
+"""For modules related to installing packages.
+"""
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..df334f6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/editable_legacy.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/editable_legacy.cpython-39.pyc
new file mode 100644
index 0000000..3237cde
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/editable_legacy.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/legacy.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/legacy.cpython-39.pyc
new file mode 100644
index 0000000..22ce590
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/legacy.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/wheel.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/wheel.cpython-39.pyc
new file mode 100644
index 0000000..5249bf5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/__pycache__/wheel.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/editable_legacy.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/editable_legacy.py
new file mode 100644
index 0000000..bb548cd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/editable_legacy.py
@@ -0,0 +1,47 @@
+"""Legacy editable installation process, i.e. `setup.py develop`.
+"""
+import logging
+from typing import List, Optional, Sequence
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.setuptools_build import make_setuptools_develop_args
+from pip._internal.utils.subprocess import call_subprocess
+
+logger = logging.getLogger(__name__)
+
+
+def install_editable(
+    install_options: List[str],
+    global_options: Sequence[str],
+    prefix: Optional[str],
+    home: Optional[str],
+    use_user_site: bool,
+    name: str,
+    setup_py_path: str,
+    isolated: bool,
+    build_env: BuildEnvironment,
+    unpacked_source_directory: str,
+) -> None:
+    """Install a package in editable mode. Most arguments are pass-through
+    to setuptools.
+    """
+    logger.info("Running setup.py develop for %s", name)
+
+    args = make_setuptools_develop_args(
+        setup_py_path,
+        global_options=global_options,
+        install_options=install_options,
+        no_user_config=isolated,
+        prefix=prefix,
+        home=home,
+        use_user_site=use_user_site,
+    )
+
+    with indent_log():
+        with build_env:
+            call_subprocess(
+                args,
+                command_desc="python setup.py develop",
+                cwd=unpacked_source_directory,
+            )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/legacy.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/legacy.py
new file mode 100644
index 0000000..290967d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/legacy.py
@@ -0,0 +1,120 @@
+"""Legacy installation process, i.e. `setup.py install`.
+"""
+
+import logging
+import os
+from typing import List, Optional, Sequence
+
+from pip._internal.build_env import BuildEnvironment
+from pip._internal.exceptions import InstallationError, LegacyInstallFailure
+from pip._internal.locations.base import change_root
+from pip._internal.models.scheme import Scheme
+from pip._internal.utils.misc import ensure_dir
+from pip._internal.utils.setuptools_build import make_setuptools_install_args
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+def write_installed_files_from_setuptools_record(
+    record_lines: List[str],
+    root: Optional[str],
+    req_description: str,
+) -> None:
+    def prepend_root(path: str) -> str:
+        if root is None or not os.path.isabs(path):
+            return path
+        else:
+            return change_root(root, path)
+
+    for line in record_lines:
+        directory = os.path.dirname(line)
+        if directory.endswith(".egg-info"):
+            egg_info_dir = prepend_root(directory)
+            break
+    else:
+        message = (
+            "{} did not indicate that it installed an "
+            ".egg-info directory. Only setup.py projects "
+            "generating .egg-info directories are supported."
+        ).format(req_description)
+        raise InstallationError(message)
+
+    new_lines = []
+    for line in record_lines:
+        filename = line.strip()
+        if os.path.isdir(filename):
+            filename += os.path.sep
+        new_lines.append(os.path.relpath(prepend_root(filename), egg_info_dir))
+    new_lines.sort()
+    ensure_dir(egg_info_dir)
+    inst_files_path = os.path.join(egg_info_dir, "installed-files.txt")
+    with open(inst_files_path, "w") as f:
+        f.write("\n".join(new_lines) + "\n")
+
+
+def install(
+    install_options: List[str],
+    global_options: Sequence[str],
+    root: Optional[str],
+    home: Optional[str],
+    prefix: Optional[str],
+    use_user_site: bool,
+    pycompile: bool,
+    scheme: Scheme,
+    setup_py_path: str,
+    isolated: bool,
+    req_name: str,
+    build_env: BuildEnvironment,
+    unpacked_source_directory: str,
+    req_description: str,
+) -> bool:
+
+    header_dir = scheme.headers
+
+    with TempDirectory(kind="record") as temp_dir:
+        try:
+            record_filename = os.path.join(temp_dir.path, "install-record.txt")
+            install_args = make_setuptools_install_args(
+                setup_py_path,
+                global_options=global_options,
+                install_options=install_options,
+                record_filename=record_filename,
+                root=root,
+                prefix=prefix,
+                header_dir=header_dir,
+                home=home,
+                use_user_site=use_user_site,
+                no_user_config=isolated,
+                pycompile=pycompile,
+            )
+
+            runner = runner_with_spinner_message(
+                f"Running setup.py install for {req_name}"
+            )
+            with build_env:
+                runner(
+                    cmd=install_args,
+                    cwd=unpacked_source_directory,
+                )
+
+            if not os.path.exists(record_filename):
+                logger.debug("Record file %s not found", record_filename)
+                # Signal to the caller that we didn't install the new package
+                return False
+
+        except Exception as e:
+            # Signal to the caller that we didn't install the new package
+            raise LegacyInstallFailure(package_details=req_name) from e
+
+        # At this point, we have successfully installed the requirement.
+
+        # We intentionally do not use any encoding to read the file because
+        # setuptools writes the file using distutils.file_util.write_file,
+        # which does not specify an encoding.
+        with open(record_filename) as f:
+            record_lines = f.read().splitlines()
+
+    write_installed_files_from_setuptools_record(record_lines, root, req_description)
+    return True
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/install/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/wheel.py
new file mode 100644
index 0000000..c799413
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/install/wheel.py
@@ -0,0 +1,738 @@
+"""Support for installing and building the "wheel" binary package format.
+"""
+
+import collections
+import compileall
+import contextlib
+import csv
+import importlib
+import logging
+import os.path
+import re
+import shutil
+import sys
+import warnings
+from base64 import urlsafe_b64encode
+from email.message import Message
+from itertools import chain, filterfalse, starmap
+from typing import (
+    IO,
+    TYPE_CHECKING,
+    Any,
+    BinaryIO,
+    Callable,
+    Dict,
+    Generator,
+    Iterable,
+    Iterator,
+    List,
+    NewType,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Union,
+    cast,
+)
+from zipfile import ZipFile, ZipInfo
+
+from pip._vendor.distlib.scripts import ScriptMaker
+from pip._vendor.distlib.util import get_export_entry
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.locations import get_major_minor_version
+from pip._internal.metadata import (
+    BaseDistribution,
+    FilesystemWheel,
+    get_wheel_distribution,
+)
+from pip._internal.models.direct_url import DIRECT_URL_METADATA_NAME, DirectUrl
+from pip._internal.models.scheme import SCHEME_KEYS, Scheme
+from pip._internal.utils.filesystem import adjacent_tmp_file, replace
+from pip._internal.utils.misc import captured_stdout, ensure_dir, hash_file, partition
+from pip._internal.utils.unpacking import (
+    current_umask,
+    is_within_directory,
+    set_extracted_file_to_default_mode_plus_executable,
+    zip_item_is_executable,
+)
+from pip._internal.utils.wheel import parse_wheel
+
+if TYPE_CHECKING:
+    from typing import Protocol
+
+    class File(Protocol):
+        src_record_path: "RecordPath"
+        dest_path: str
+        changed: bool
+
+        def save(self) -> None:
+            pass
+
+
+logger = logging.getLogger(__name__)
+
+RecordPath = NewType("RecordPath", str)
+InstalledCSVRow = Tuple[RecordPath, str, Union[int, str]]
+
+
+def rehash(path: str, blocksize: int = 1 << 20) -> Tuple[str, str]:
+    """Return (encoded_digest, length) for path using hashlib.sha256()"""
+    h, length = hash_file(path, blocksize)
+    digest = "sha256=" + urlsafe_b64encode(h.digest()).decode("latin1").rstrip("=")
+    return (digest, str(length))
+
+
+def csv_io_kwargs(mode: str) -> Dict[str, Any]:
+    """Return keyword arguments to properly open a CSV file
+    in the given mode.
+    """
+    return {"mode": mode, "newline": "", "encoding": "utf-8"}
+
+
+def fix_script(path: str) -> bool:
+    """Replace #!python with #!/path/to/python
+    Return True if file was changed.
+    """
+    # XXX RECORD hashes will need to be updated
+    assert os.path.isfile(path)
+
+    with open(path, "rb") as script:
+        firstline = script.readline()
+        if not firstline.startswith(b"#!python"):
+            return False
+        exename = sys.executable.encode(sys.getfilesystemencoding())
+        firstline = b"#!" + exename + os.linesep.encode("ascii")
+        rest = script.read()
+    with open(path, "wb") as script:
+        script.write(firstline)
+        script.write(rest)
+    return True
+
+
+def wheel_root_is_purelib(metadata: Message) -> bool:
+    return metadata.get("Root-Is-Purelib", "").lower() == "true"
+
+
+def get_entrypoints(dist: BaseDistribution) -> Tuple[Dict[str, str], Dict[str, str]]:
+    console_scripts = {}
+    gui_scripts = {}
+    for entry_point in dist.iter_entry_points():
+        if entry_point.group == "console_scripts":
+            console_scripts[entry_point.name] = entry_point.value
+        elif entry_point.group == "gui_scripts":
+            gui_scripts[entry_point.name] = entry_point.value
+    return console_scripts, gui_scripts
+
+
+def message_about_scripts_not_on_PATH(scripts: Sequence[str]) -> Optional[str]:
+    """Determine if any scripts are not on PATH and format a warning.
+    Returns a warning message if one or more scripts are not on PATH,
+    otherwise None.
+    """
+    if not scripts:
+        return None
+
+    # Group scripts by the path they were installed in
+    grouped_by_dir: Dict[str, Set[str]] = collections.defaultdict(set)
+    for destfile in scripts:
+        parent_dir = os.path.dirname(destfile)
+        script_name = os.path.basename(destfile)
+        grouped_by_dir[parent_dir].add(script_name)
+
+    # We don't want to warn for directories that are on PATH.
+    not_warn_dirs = [
+        os.path.normcase(i).rstrip(os.sep)
+        for i in os.environ.get("PATH", "").split(os.pathsep)
+    ]
+    # If an executable sits with sys.executable, we don't warn for it.
+    #     This covers the case of venv invocations without activating the venv.
+    not_warn_dirs.append(os.path.normcase(os.path.dirname(sys.executable)))
+    warn_for: Dict[str, Set[str]] = {
+        parent_dir: scripts
+        for parent_dir, scripts in grouped_by_dir.items()
+        if os.path.normcase(parent_dir) not in not_warn_dirs
+    }
+    if not warn_for:
+        return None
+
+    # Format a message
+    msg_lines = []
+    for parent_dir, dir_scripts in warn_for.items():
+        sorted_scripts: List[str] = sorted(dir_scripts)
+        if len(sorted_scripts) == 1:
+            start_text = "script {} is".format(sorted_scripts[0])
+        else:
+            start_text = "scripts {} are".format(
+                ", ".join(sorted_scripts[:-1]) + " and " + sorted_scripts[-1]
+            )
+
+        msg_lines.append(
+            "The {} installed in '{}' which is not on PATH.".format(
+                start_text, parent_dir
+            )
+        )
+
+    last_line_fmt = (
+        "Consider adding {} to PATH or, if you prefer "
+        "to suppress this warning, use --no-warn-script-location."
+    )
+    if len(msg_lines) == 1:
+        msg_lines.append(last_line_fmt.format("this directory"))
+    else:
+        msg_lines.append(last_line_fmt.format("these directories"))
+
+    # Add a note if any directory starts with ~
+    warn_for_tilde = any(
+        i[0] == "~" for i in os.environ.get("PATH", "").split(os.pathsep) if i
+    )
+    if warn_for_tilde:
+        tilde_warning_msg = (
+            "NOTE: The current PATH contains path(s) starting with `~`, "
+            "which may not be expanded by all applications."
+        )
+        msg_lines.append(tilde_warning_msg)
+
+    # Returns the formatted multiline message
+    return "\n".join(msg_lines)
+
+
+def _normalized_outrows(
+    outrows: Iterable[InstalledCSVRow],
+) -> List[Tuple[str, str, str]]:
+    """Normalize the given rows of a RECORD file.
+
+    Items in each row are converted into str. Rows are then sorted to make
+    the value more predictable for tests.
+
+    Each row is a 3-tuple (path, hash, size) and corresponds to a record of
+    a RECORD file (see PEP 376 and PEP 427 for details).  For the rows
+    passed to this function, the size can be an integer as an int or string,
+    or the empty string.
+    """
+    # Normally, there should only be one row per path, in which case the
+    # second and third elements don't come into play when sorting.
+    # However, in cases in the wild where a path might happen to occur twice,
+    # we don't want the sort operation to trigger an error (but still want
+    # determinism).  Since the third element can be an int or string, we
+    # coerce each element to a string to avoid a TypeError in this case.
+    # For additional background, see--
+    # https://github.com/pypa/pip/issues/5868
+    return sorted(
+        (record_path, hash_, str(size)) for record_path, hash_, size in outrows
+    )
+
+
+def _record_to_fs_path(record_path: RecordPath, lib_dir: str) -> str:
+    return os.path.join(lib_dir, record_path)
+
+
+def _fs_to_record_path(path: str, lib_dir: str) -> RecordPath:
+    # On Windows, do not handle relative paths if they belong to different
+    # logical disks
+    if os.path.splitdrive(path)[0].lower() == os.path.splitdrive(lib_dir)[0].lower():
+        path = os.path.relpath(path, lib_dir)
+
+    path = path.replace(os.path.sep, "/")
+    return cast("RecordPath", path)
+
+
+def get_csv_rows_for_installed(
+    old_csv_rows: List[List[str]],
+    installed: Dict[RecordPath, RecordPath],
+    changed: Set[RecordPath],
+    generated: List[str],
+    lib_dir: str,
+) -> List[InstalledCSVRow]:
+    """
+    :param installed: A map from archive RECORD path to installation RECORD
+        path.
+    """
+    installed_rows: List[InstalledCSVRow] = []
+    for row in old_csv_rows:
+        if len(row) > 3:
+            logger.warning("RECORD line has more than three elements: %s", row)
+        old_record_path = cast("RecordPath", row[0])
+        new_record_path = installed.pop(old_record_path, old_record_path)
+        if new_record_path in changed:
+            digest, length = rehash(_record_to_fs_path(new_record_path, lib_dir))
+        else:
+            digest = row[1] if len(row) > 1 else ""
+            length = row[2] if len(row) > 2 else ""
+        installed_rows.append((new_record_path, digest, length))
+    for f in generated:
+        path = _fs_to_record_path(f, lib_dir)
+        digest, length = rehash(f)
+        installed_rows.append((path, digest, length))
+    for installed_record_path in installed.values():
+        installed_rows.append((installed_record_path, "", ""))
+    return installed_rows
+
+
+def get_console_script_specs(console: Dict[str, str]) -> List[str]:
+    """
+    Given the mapping from entrypoint name to callable, return the relevant
+    console script specs.
+    """
+    # Don't mutate caller's version
+    console = console.copy()
+
+    scripts_to_generate = []
+
+    # Special case pip and setuptools to generate versioned wrappers
+    #
+    # The issue is that some projects (specifically, pip and setuptools) use
+    # code in setup.py to create "versioned" entry points - pip2.7 on Python
+    # 2.7, pip3.3 on Python 3.3, etc. But these entry points are baked into
+    # the wheel metadata at build time, and so if the wheel is installed with
+    # a *different* version of Python the entry points will be wrong. The
+    # correct fix for this is to enhance the metadata to be able to describe
+    # such versioned entry points, but that won't happen till Metadata 2.0 is
+    # available.
+    # In the meantime, projects using versioned entry points will either have
+    # incorrect versioned entry points, or they will not be able to distribute
+    # "universal" wheels (i.e., they will need a wheel per Python version).
+    #
+    # Because setuptools and pip are bundled with _ensurepip and virtualenv,
+    # we need to use universal wheels. So, as a stopgap until Metadata 2.0, we
+    # override the versioned entry points in the wheel and generate the
+    # correct ones. This code is purely a short-term measure until Metadata 2.0
+    # is available.
+    #
+    # To add the level of hack in this section of code, in order to support
+    # ensurepip this code will look for an ``ENSUREPIP_OPTIONS`` environment
+    # variable which will control which version scripts get installed.
+    #
+    # ENSUREPIP_OPTIONS=altinstall
+    #   - Only pipX.Y and easy_install-X.Y will be generated and installed
+    # ENSUREPIP_OPTIONS=install
+    #   - pipX.Y, pipX, easy_install-X.Y will be generated and installed. Note
+    #     that this option is technically if ENSUREPIP_OPTIONS is set and is
+    #     not altinstall
+    # DEFAULT
+    #   - The default behavior is to install pip, pipX, pipX.Y, easy_install
+    #     and easy_install-X.Y.
+    pip_script = console.pop("pip", None)
+    if pip_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            scripts_to_generate.append("pip = " + pip_script)
+
+        if os.environ.get("ENSUREPIP_OPTIONS", "") != "altinstall":
+            scripts_to_generate.append(
+                "pip{} = {}".format(sys.version_info[0], pip_script)
+            )
+
+        scripts_to_generate.append(f"pip{get_major_minor_version()} = {pip_script}")
+        # Delete any other versioned pip entry points
+        pip_ep = [k for k in console if re.match(r"pip(\d+(\.\d+)?)?$", k)]
+        for k in pip_ep:
+            del console[k]
+    easy_install_script = console.pop("easy_install", None)
+    if easy_install_script:
+        if "ENSUREPIP_OPTIONS" not in os.environ:
+            scripts_to_generate.append("easy_install = " + easy_install_script)
+
+        scripts_to_generate.append(
+            "easy_install-{} = {}".format(
+                get_major_minor_version(), easy_install_script
+            )
+        )
+        # Delete any other versioned easy_install entry points
+        easy_install_ep = [
+            k for k in console if re.match(r"easy_install(-\d+\.\d+)?$", k)
+        ]
+        for k in easy_install_ep:
+            del console[k]
+
+    # Generate the console entry points specified in the wheel
+    scripts_to_generate.extend(starmap("{} = {}".format, console.items()))
+
+    return scripts_to_generate
+
+
+class ZipBackedFile:
+    def __init__(
+        self, src_record_path: RecordPath, dest_path: str, zip_file: ZipFile
+    ) -> None:
+        self.src_record_path = src_record_path
+        self.dest_path = dest_path
+        self._zip_file = zip_file
+        self.changed = False
+
+    def _getinfo(self) -> ZipInfo:
+        return self._zip_file.getinfo(self.src_record_path)
+
+    def save(self) -> None:
+        # directory creation is lazy and after file filtering
+        # to ensure we don't install empty dirs; empty dirs can't be
+        # uninstalled.
+        parent_dir = os.path.dirname(self.dest_path)
+        ensure_dir(parent_dir)
+
+        # When we open the output file below, any existing file is truncated
+        # before we start writing the new contents. This is fine in most
+        # cases, but can cause a segfault if pip has loaded a shared
+        # object (e.g. from pyopenssl through its vendored urllib3)
+        # Since the shared object is mmap'd an attempt to call a
+        # symbol in it will then cause a segfault. Unlinking the file
+        # allows writing of new contents while allowing the process to
+        # continue to use the old copy.
+        if os.path.exists(self.dest_path):
+            os.unlink(self.dest_path)
+
+        zipinfo = self._getinfo()
+
+        with self._zip_file.open(zipinfo) as f:
+            with open(self.dest_path, "wb") as dest:
+                shutil.copyfileobj(f, dest)
+
+        if zip_item_is_executable(zipinfo):
+            set_extracted_file_to_default_mode_plus_executable(self.dest_path)
+
+
+class ScriptFile:
+    def __init__(self, file: "File") -> None:
+        self._file = file
+        self.src_record_path = self._file.src_record_path
+        self.dest_path = self._file.dest_path
+        self.changed = False
+
+    def save(self) -> None:
+        self._file.save()
+        self.changed = fix_script(self.dest_path)
+
+
+class MissingCallableSuffix(InstallationError):
+    def __init__(self, entry_point: str) -> None:
+        super().__init__(
+            "Invalid script entry point: {} - A callable "
+            "suffix is required. Cf https://packaging.python.org/"
+            "specifications/entry-points/#use-for-scripts for more "
+            "information.".format(entry_point)
+        )
+
+
+def _raise_for_invalid_entrypoint(specification: str) -> None:
+    entry = get_export_entry(specification)
+    if entry is not None and entry.suffix is None:
+        raise MissingCallableSuffix(str(entry))
+
+
+class PipScriptMaker(ScriptMaker):
+    def make(
+        self, specification: str, options: Optional[Dict[str, Any]] = None
+    ) -> List[str]:
+        _raise_for_invalid_entrypoint(specification)
+        return super().make(specification, options)
+
+
+def _install_wheel(
+    name: str,
+    wheel_zip: ZipFile,
+    wheel_path: str,
+    scheme: Scheme,
+    pycompile: bool = True,
+    warn_script_location: bool = True,
+    direct_url: Optional[DirectUrl] = None,
+    requested: bool = False,
+) -> None:
+    """Install a wheel.
+
+    :param name: Name of the project to install
+    :param wheel_zip: open ZipFile for wheel being installed
+    :param scheme: Distutils scheme dictating the install directories
+    :param req_description: String used in place of the requirement, for
+        logging
+    :param pycompile: Whether to byte-compile installed Python files
+    :param warn_script_location: Whether to check that scripts are installed
+        into a directory on PATH
+    :raises UnsupportedWheel:
+        * when the directory holds an unpacked wheel with incompatible
+          Wheel-Version
+        * when the .dist-info dir does not match the wheel
+    """
+    info_dir, metadata = parse_wheel(wheel_zip, name)
+
+    if wheel_root_is_purelib(metadata):
+        lib_dir = scheme.purelib
+    else:
+        lib_dir = scheme.platlib
+
+    # Record details of the files moved
+    #   installed = files copied from the wheel to the destination
+    #   changed = files changed while installing (scripts #! line typically)
+    #   generated = files newly generated during the install (script wrappers)
+    installed: Dict[RecordPath, RecordPath] = {}
+    changed: Set[RecordPath] = set()
+    generated: List[str] = []
+
+    def record_installed(
+        srcfile: RecordPath, destfile: str, modified: bool = False
+    ) -> None:
+        """Map archive RECORD paths to installation RECORD paths."""
+        newpath = _fs_to_record_path(destfile, lib_dir)
+        installed[srcfile] = newpath
+        if modified:
+            changed.add(newpath)
+
+    def is_dir_path(path: RecordPath) -> bool:
+        return path.endswith("/")
+
+    def assert_no_path_traversal(dest_dir_path: str, target_path: str) -> None:
+        if not is_within_directory(dest_dir_path, target_path):
+            message = (
+                "The wheel {!r} has a file {!r} trying to install"
+                " outside the target directory {!r}"
+            )
+            raise InstallationError(
+                message.format(wheel_path, target_path, dest_dir_path)
+            )
+
+    def root_scheme_file_maker(
+        zip_file: ZipFile, dest: str
+    ) -> Callable[[RecordPath], "File"]:
+        def make_root_scheme_file(record_path: RecordPath) -> "File":
+            normed_path = os.path.normpath(record_path)
+            dest_path = os.path.join(dest, normed_path)
+            assert_no_path_traversal(dest, dest_path)
+            return ZipBackedFile(record_path, dest_path, zip_file)
+
+        return make_root_scheme_file
+
+    def data_scheme_file_maker(
+        zip_file: ZipFile, scheme: Scheme
+    ) -> Callable[[RecordPath], "File"]:
+        scheme_paths = {key: getattr(scheme, key) for key in SCHEME_KEYS}
+
+        def make_data_scheme_file(record_path: RecordPath) -> "File":
+            normed_path = os.path.normpath(record_path)
+            try:
+                _, scheme_key, dest_subpath = normed_path.split(os.path.sep, 2)
+            except ValueError:
+                message = (
+                    "Unexpected file in {}: {!r}. .data directory contents"
+                    " should be named like: '<scheme key>/<path>'."
+                ).format(wheel_path, record_path)
+                raise InstallationError(message)
+
+            try:
+                scheme_path = scheme_paths[scheme_key]
+            except KeyError:
+                valid_scheme_keys = ", ".join(sorted(scheme_paths))
+                message = (
+                    "Unknown scheme key used in {}: {} (for file {!r}). .data"
+                    " directory contents should be in subdirectories named"
+                    " with a valid scheme key ({})"
+                ).format(wheel_path, scheme_key, record_path, valid_scheme_keys)
+                raise InstallationError(message)
+
+            dest_path = os.path.join(scheme_path, dest_subpath)
+            assert_no_path_traversal(scheme_path, dest_path)
+            return ZipBackedFile(record_path, dest_path, zip_file)
+
+        return make_data_scheme_file
+
+    def is_data_scheme_path(path: RecordPath) -> bool:
+        return path.split("/", 1)[0].endswith(".data")
+
+    paths = cast(List[RecordPath], wheel_zip.namelist())
+    file_paths = filterfalse(is_dir_path, paths)
+    root_scheme_paths, data_scheme_paths = partition(is_data_scheme_path, file_paths)
+
+    make_root_scheme_file = root_scheme_file_maker(wheel_zip, lib_dir)
+    files: Iterator[File] = map(make_root_scheme_file, root_scheme_paths)
+
+    def is_script_scheme_path(path: RecordPath) -> bool:
+        parts = path.split("/", 2)
+        return len(parts) > 2 and parts[0].endswith(".data") and parts[1] == "scripts"
+
+    other_scheme_paths, script_scheme_paths = partition(
+        is_script_scheme_path, data_scheme_paths
+    )
+
+    make_data_scheme_file = data_scheme_file_maker(wheel_zip, scheme)
+    other_scheme_files = map(make_data_scheme_file, other_scheme_paths)
+    files = chain(files, other_scheme_files)
+
+    # Get the defined entry points
+    distribution = get_wheel_distribution(
+        FilesystemWheel(wheel_path),
+        canonicalize_name(name),
+    )
+    console, gui = get_entrypoints(distribution)
+
+    def is_entrypoint_wrapper(file: "File") -> bool:
+        # EP, EP.exe and EP-script.py are scripts generated for
+        # entry point EP by setuptools
+        path = file.dest_path
+        name = os.path.basename(path)
+        if name.lower().endswith(".exe"):
+            matchname = name[:-4]
+        elif name.lower().endswith("-script.py"):
+            matchname = name[:-10]
+        elif name.lower().endswith(".pya"):
+            matchname = name[:-4]
+        else:
+            matchname = name
+        # Ignore setuptools-generated scripts
+        return matchname in console or matchname in gui
+
+    script_scheme_files: Iterator[File] = map(
+        make_data_scheme_file, script_scheme_paths
+    )
+    script_scheme_files = filterfalse(is_entrypoint_wrapper, script_scheme_files)
+    script_scheme_files = map(ScriptFile, script_scheme_files)
+    files = chain(files, script_scheme_files)
+
+    for file in files:
+        file.save()
+        record_installed(file.src_record_path, file.dest_path, file.changed)
+
+    def pyc_source_file_paths() -> Generator[str, None, None]:
+        # We de-duplicate installation paths, since there can be overlap (e.g.
+        # file in .data maps to same location as file in wheel root).
+        # Sorting installation paths makes it easier to reproduce and debug
+        # issues related to permissions on existing files.
+        for installed_path in sorted(set(installed.values())):
+            full_installed_path = os.path.join(lib_dir, installed_path)
+            if not os.path.isfile(full_installed_path):
+                continue
+            if not full_installed_path.endswith(".py"):
+                continue
+            yield full_installed_path
+
+    def pyc_output_path(path: str) -> str:
+        """Return the path the pyc file would have been written to."""
+        return importlib.util.cache_from_source(path)
+
+    # Compile all of the pyc files for the installed files
+    if pycompile:
+        with captured_stdout() as stdout:
+            with warnings.catch_warnings():
+                warnings.filterwarnings("ignore")
+                for path in pyc_source_file_paths():
+                    success = compileall.compile_file(path, force=True, quiet=True)
+                    if success:
+                        pyc_path = pyc_output_path(path)
+                        assert os.path.exists(pyc_path)
+                        pyc_record_path = cast(
+                            "RecordPath", pyc_path.replace(os.path.sep, "/")
+                        )
+                        record_installed(pyc_record_path, pyc_path)
+        logger.debug(stdout.getvalue())
+
+    maker = PipScriptMaker(None, scheme.scripts)
+
+    # Ensure old scripts are overwritten.
+    # See https://github.com/pypa/pip/issues/1800
+    maker.clobber = True
+
+    # Ensure we don't generate any variants for scripts because this is almost
+    # never what somebody wants.
+    # See https://bitbucket.org/pypa/distlib/issue/35/
+    maker.variants = {""}
+
+    # This is required because otherwise distlib creates scripts that are not
+    # executable.
+    # See https://bitbucket.org/pypa/distlib/issue/32/
+    maker.set_mode = True
+
+    # Generate the console and GUI entry points specified in the wheel
+    scripts_to_generate = get_console_script_specs(console)
+
+    gui_scripts_to_generate = list(starmap("{} = {}".format, gui.items()))
+
+    generated_console_scripts = maker.make_multiple(scripts_to_generate)
+    generated.extend(generated_console_scripts)
+
+    generated.extend(maker.make_multiple(gui_scripts_to_generate, {"gui": True}))
+
+    if warn_script_location:
+        msg = message_about_scripts_not_on_PATH(generated_console_scripts)
+        if msg is not None:
+            logger.warning(msg)
+
+    generated_file_mode = 0o666 & ~current_umask()
+
+    @contextlib.contextmanager
+    def _generate_file(path: str, **kwargs: Any) -> Generator[BinaryIO, None, None]:
+        with adjacent_tmp_file(path, **kwargs) as f:
+            yield f
+        os.chmod(f.name, generated_file_mode)
+        replace(f.name, path)
+
+    dest_info_dir = os.path.join(lib_dir, info_dir)
+
+    # Record pip as the installer
+    installer_path = os.path.join(dest_info_dir, "INSTALLER")
+    with _generate_file(installer_path) as installer_file:
+        installer_file.write(b"pip\n")
+    generated.append(installer_path)
+
+    # Record the PEP 610 direct URL reference
+    if direct_url is not None:
+        direct_url_path = os.path.join(dest_info_dir, DIRECT_URL_METADATA_NAME)
+        with _generate_file(direct_url_path) as direct_url_file:
+            direct_url_file.write(direct_url.to_json().encode("utf-8"))
+        generated.append(direct_url_path)
+
+    # Record the REQUESTED file
+    if requested:
+        requested_path = os.path.join(dest_info_dir, "REQUESTED")
+        with open(requested_path, "wb"):
+            pass
+        generated.append(requested_path)
+
+    record_text = distribution.read_text("RECORD")
+    record_rows = list(csv.reader(record_text.splitlines()))
+
+    rows = get_csv_rows_for_installed(
+        record_rows,
+        installed=installed,
+        changed=changed,
+        generated=generated,
+        lib_dir=lib_dir,
+    )
+
+    # Record details of all files installed
+    record_path = os.path.join(dest_info_dir, "RECORD")
+
+    with _generate_file(record_path, **csv_io_kwargs("w")) as record_file:
+        # Explicitly cast to typing.IO[str] as a workaround for the mypy error:
+        # "writer" has incompatible type "BinaryIO"; expected "_Writer"
+        writer = csv.writer(cast("IO[str]", record_file))
+        writer.writerows(_normalized_outrows(rows))
+
+
+@contextlib.contextmanager
+def req_error_context(req_description: str) -> Generator[None, None, None]:
+    try:
+        yield
+    except InstallationError as e:
+        message = "For req: {}. {}".format(req_description, e.args[0])
+        raise InstallationError(message) from e
+
+
+def install_wheel(
+    name: str,
+    wheel_path: str,
+    scheme: Scheme,
+    req_description: str,
+    pycompile: bool = True,
+    warn_script_location: bool = True,
+    direct_url: Optional[DirectUrl] = None,
+    requested: bool = False,
+) -> None:
+    with ZipFile(wheel_path, allowZip64=True) as z:
+        with req_error_context(req_description):
+            _install_wheel(
+                name=name,
+                wheel_zip=z,
+                wheel_path=wheel_path,
+                scheme=scheme,
+                pycompile=pycompile,
+                warn_script_location=warn_script_location,
+                direct_url=direct_url,
+                requested=requested,
+            )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/operations/prepare.py b/venv/lib/python3.9/site-packages/pip/_internal/operations/prepare.py
new file mode 100644
index 0000000..4bf414c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/operations/prepare.py
@@ -0,0 +1,667 @@
+"""Prepares a distribution for installation
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import logging
+import mimetypes
+import os
+import shutil
+from typing import Dict, Iterable, List, Optional
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.distributions import make_distribution_for_install_requirement
+from pip._internal.distributions.installed import InstalledDistribution
+from pip._internal.exceptions import (
+    DirectoryUrlHashUnsupported,
+    HashMismatch,
+    HashUnpinned,
+    InstallationError,
+    MetadataInconsistent,
+    NetworkConnectionError,
+    PreviousBuildDirError,
+    VcsHashUnsupported,
+)
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution, get_metadata_distribution
+from pip._internal.models.direct_url import ArchiveInfo
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.network.download import BatchDownloader, Downloader
+from pip._internal.network.lazy_wheel import (
+    HTTPRangeRequestUnsupported,
+    dist_from_wheel_url,
+)
+from pip._internal.network.session import PipSession
+from pip._internal.operations.build.build_tracker import BuildTracker
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.direct_url_helpers import (
+    direct_url_for_editable,
+    direct_url_from_link,
+)
+from pip._internal.utils.hashes import Hashes, MissingHashes
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import (
+    display_path,
+    hash_file,
+    hide_url,
+    is_installable_dir,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.unpacking import unpack_file
+from pip._internal.vcs import vcs
+
+logger = logging.getLogger(__name__)
+
+
+def _get_prepared_distribution(
+    req: InstallRequirement,
+    build_tracker: BuildTracker,
+    finder: PackageFinder,
+    build_isolation: bool,
+    check_build_deps: bool,
+) -> BaseDistribution:
+    """Prepare a distribution for installation."""
+    abstract_dist = make_distribution_for_install_requirement(req)
+    with build_tracker.track(req):
+        abstract_dist.prepare_distribution_metadata(
+            finder, build_isolation, check_build_deps
+        )
+    return abstract_dist.get_metadata_distribution()
+
+
+def unpack_vcs_link(link: Link, location: str, verbosity: int) -> None:
+    vcs_backend = vcs.get_backend_for_scheme(link.scheme)
+    assert vcs_backend is not None
+    vcs_backend.unpack(location, url=hide_url(link.url), verbosity=verbosity)
+
+
+class File:
+    def __init__(self, path: str, content_type: Optional[str]) -> None:
+        self.path = path
+        if content_type is None:
+            self.content_type = mimetypes.guess_type(path)[0]
+        else:
+            self.content_type = content_type
+
+
+def get_http_url(
+    link: Link,
+    download: Downloader,
+    download_dir: Optional[str] = None,
+    hashes: Optional[Hashes] = None,
+) -> File:
+    temp_dir = TempDirectory(kind="unpack", globally_managed=True)
+    # If a download dir is specified, is the file already downloaded there?
+    already_downloaded_path = None
+    if download_dir:
+        already_downloaded_path = _check_download_dir(link, download_dir, hashes)
+
+    if already_downloaded_path:
+        from_path = already_downloaded_path
+        content_type = None
+    else:
+        # let's download to a tmp dir
+        from_path, content_type = download(link, temp_dir.path)
+        if hashes:
+            hashes.check_against_path(from_path)
+
+    return File(from_path, content_type)
+
+
+def get_file_url(
+    link: Link, download_dir: Optional[str] = None, hashes: Optional[Hashes] = None
+) -> File:
+    """Get file and optionally check its hash."""
+    # If a download dir is specified, is the file already there and valid?
+    already_downloaded_path = None
+    if download_dir:
+        already_downloaded_path = _check_download_dir(link, download_dir, hashes)
+
+    if already_downloaded_path:
+        from_path = already_downloaded_path
+    else:
+        from_path = link.file_path
+
+    # If --require-hashes is off, `hashes` is either empty, the
+    # link's embedded hash, or MissingHashes; it is required to
+    # match. If --require-hashes is on, we are satisfied by any
+    # hash in `hashes` matching: a URL-based or an option-based
+    # one; no internet-sourced hash will be in `hashes`.
+    if hashes:
+        hashes.check_against_path(from_path)
+    return File(from_path, None)
+
+
+def unpack_url(
+    link: Link,
+    location: str,
+    download: Downloader,
+    verbosity: int,
+    download_dir: Optional[str] = None,
+    hashes: Optional[Hashes] = None,
+) -> Optional[File]:
+    """Unpack link into location, downloading if required.
+
+    :param hashes: A Hashes object, one of whose embedded hashes must match,
+        or HashMismatch will be raised. If the Hashes is empty, no matches are
+        required, and unhashable types of requirements (like VCS ones, which
+        would ordinarily raise HashUnsupported) are allowed.
+    """
+    # non-editable vcs urls
+    if link.is_vcs:
+        unpack_vcs_link(link, location, verbosity=verbosity)
+        return None
+
+    assert not link.is_existing_dir()
+
+    # file urls
+    if link.is_file:
+        file = get_file_url(link, download_dir, hashes=hashes)
+
+    # http urls
+    else:
+        file = get_http_url(
+            link,
+            download,
+            download_dir,
+            hashes=hashes,
+        )
+
+    # unpack the archive to the build dir location. even when only downloading
+    # archives, they have to be unpacked to parse dependencies, except wheels
+    if not link.is_wheel:
+        unpack_file(file.path, location, file.content_type)
+
+    return file
+
+
+def _check_download_dir(
+    link: Link, download_dir: str, hashes: Optional[Hashes]
+) -> Optional[str]:
+    """Check download_dir for previously downloaded file with correct hash
+    If a correct file is found return its path else None
+    """
+    download_path = os.path.join(download_dir, link.filename)
+
+    if not os.path.exists(download_path):
+        return None
+
+    # If already downloaded, does its hash match?
+    logger.info("File was already downloaded %s", download_path)
+    if hashes:
+        try:
+            hashes.check_against_path(download_path)
+        except HashMismatch:
+            logger.warning(
+                "Previously-downloaded file %s has bad hash. Re-downloading.",
+                download_path,
+            )
+            os.unlink(download_path)
+            return None
+    return download_path
+
+
+class RequirementPreparer:
+    """Prepares a Requirement"""
+
+    def __init__(
+        self,
+        build_dir: str,
+        download_dir: Optional[str],
+        src_dir: str,
+        build_isolation: bool,
+        check_build_deps: bool,
+        build_tracker: BuildTracker,
+        session: PipSession,
+        progress_bar: str,
+        finder: PackageFinder,
+        require_hashes: bool,
+        use_user_site: bool,
+        lazy_wheel: bool,
+        verbosity: int,
+    ) -> None:
+        super().__init__()
+
+        self.src_dir = src_dir
+        self.build_dir = build_dir
+        self.build_tracker = build_tracker
+        self._session = session
+        self._download = Downloader(session, progress_bar)
+        self._batch_download = BatchDownloader(session, progress_bar)
+        self.finder = finder
+
+        # Where still-packed archives should be written to. If None, they are
+        # not saved, and are deleted immediately after unpacking.
+        self.download_dir = download_dir
+
+        # Is build isolation allowed?
+        self.build_isolation = build_isolation
+
+        # Should check build dependencies?
+        self.check_build_deps = check_build_deps
+
+        # Should hash-checking be required?
+        self.require_hashes = require_hashes
+
+        # Should install in user site-packages?
+        self.use_user_site = use_user_site
+
+        # Should wheels be downloaded lazily?
+        self.use_lazy_wheel = lazy_wheel
+
+        # How verbose should underlying tooling be?
+        self.verbosity = verbosity
+
+        # Memoized downloaded files, as mapping of url: path.
+        self._downloaded: Dict[str, str] = {}
+
+        # Previous "header" printed for a link-based InstallRequirement
+        self._previous_requirement_header = ("", "")
+
+    def _log_preparing_link(self, req: InstallRequirement) -> None:
+        """Provide context for the requirement being prepared."""
+        if req.link.is_file and not req.original_link_is_in_wheel_cache:
+            message = "Processing %s"
+            information = str(display_path(req.link.file_path))
+        else:
+            message = "Collecting %s"
+            information = str(req.req or req)
+
+        if (message, information) != self._previous_requirement_header:
+            self._previous_requirement_header = (message, information)
+            logger.info(message, information)
+
+        if req.original_link_is_in_wheel_cache:
+            with indent_log():
+                logger.info("Using cached %s", req.link.filename)
+
+    def _ensure_link_req_src_dir(
+        self, req: InstallRequirement, parallel_builds: bool
+    ) -> None:
+        """Ensure source_dir of a linked InstallRequirement."""
+        # Since source_dir is only set for editable requirements.
+        if req.link.is_wheel:
+            # We don't need to unpack wheels, so no need for a source
+            # directory.
+            return
+        assert req.source_dir is None
+        if req.link.is_existing_dir():
+            # build local directories in-tree
+            req.source_dir = req.link.file_path
+            return
+
+        # We always delete unpacked sdists after pip runs.
+        req.ensure_has_source_dir(
+            self.build_dir,
+            autodelete=True,
+            parallel_builds=parallel_builds,
+        )
+
+        # If a checkout exists, it's unwise to keep going.  version
+        # inconsistencies are logged later, but do not fail the
+        # installation.
+        # FIXME: this won't upgrade when there's an existing
+        # package unpacked in `req.source_dir`
+        # TODO: this check is now probably dead code
+        if is_installable_dir(req.source_dir):
+            raise PreviousBuildDirError(
+                "pip can't proceed with requirements '{}' due to a"
+                "pre-existing build directory ({}). This is likely "
+                "due to a previous installation that failed . pip is "
+                "being responsible and not assuming it can delete this. "
+                "Please delete it and try again.".format(req, req.source_dir)
+            )
+
+    def _get_linked_req_hashes(self, req: InstallRequirement) -> Hashes:
+        # By the time this is called, the requirement's link should have
+        # been checked so we can tell what kind of requirements req is
+        # and raise some more informative errors than otherwise.
+        # (For example, we can raise VcsHashUnsupported for a VCS URL
+        # rather than HashMissing.)
+        if not self.require_hashes:
+            return req.hashes(trust_internet=True)
+
+        # We could check these first 2 conditions inside unpack_url
+        # and save repetition of conditions, but then we would
+        # report less-useful error messages for unhashable
+        # requirements, complaining that there's no hash provided.
+        if req.link.is_vcs:
+            raise VcsHashUnsupported()
+        if req.link.is_existing_dir():
+            raise DirectoryUrlHashUnsupported()
+
+        # Unpinned packages are asking for trouble when a new version
+        # is uploaded.  This isn't a security check, but it saves users
+        # a surprising hash mismatch in the future.
+        # file:/// URLs aren't pinnable, so don't complain about them
+        # not being pinned.
+        if req.original_link is None and not req.is_pinned:
+            raise HashUnpinned()
+
+        # If known-good hashes are missing for this requirement,
+        # shim it with a facade object that will provoke hash
+        # computation and then raise a HashMissing exception
+        # showing the user what the hash should be.
+        return req.hashes(trust_internet=False) or MissingHashes()
+
+    def _fetch_metadata_only(
+        self,
+        req: InstallRequirement,
+    ) -> Optional[BaseDistribution]:
+        if self.require_hashes:
+            logger.debug(
+                "Metadata-only fetching is not used as hash checking is required",
+            )
+            return None
+        # Try PEP 658 metadata first, then fall back to lazy wheel if unavailable.
+        return self._fetch_metadata_using_link_data_attr(
+            req
+        ) or self._fetch_metadata_using_lazy_wheel(req.link)
+
+    def _fetch_metadata_using_link_data_attr(
+        self,
+        req: InstallRequirement,
+    ) -> Optional[BaseDistribution]:
+        """Fetch metadata from the data-dist-info-metadata attribute, if possible."""
+        # (1) Get the link to the metadata file, if provided by the backend.
+        metadata_link = req.link.metadata_link()
+        if metadata_link is None:
+            return None
+        assert req.req is not None
+        logger.info(
+            "Obtaining dependency information for %s from %s",
+            req.req,
+            metadata_link,
+        )
+        # (2) Download the contents of the METADATA file, separate from the dist itself.
+        metadata_file = get_http_url(
+            metadata_link,
+            self._download,
+            hashes=metadata_link.as_hashes(),
+        )
+        with open(metadata_file.path, "rb") as f:
+            metadata_contents = f.read()
+        # (3) Generate a dist just from those file contents.
+        metadata_dist = get_metadata_distribution(
+            metadata_contents,
+            req.link.filename,
+            req.req.name,
+        )
+        # (4) Ensure the Name: field from the METADATA file matches the name from the
+        #     install requirement.
+        #
+        #     NB: raw_name will fall back to the name from the install requirement if
+        #     the Name: field is not present, but it's noted in the raw_name docstring
+        #     that that should NEVER happen anyway.
+        if metadata_dist.raw_name != req.req.name:
+            raise MetadataInconsistent(
+                req, "Name", req.req.name, metadata_dist.raw_name
+            )
+        return metadata_dist
+
+    def _fetch_metadata_using_lazy_wheel(
+        self,
+        link: Link,
+    ) -> Optional[BaseDistribution]:
+        """Fetch metadata using lazy wheel, if possible."""
+        # --use-feature=fast-deps must be provided.
+        if not self.use_lazy_wheel:
+            return None
+        if link.is_file or not link.is_wheel:
+            logger.debug(
+                "Lazy wheel is not used as %r does not point to a remote wheel",
+                link,
+            )
+            return None
+
+        wheel = Wheel(link.filename)
+        name = canonicalize_name(wheel.name)
+        logger.info(
+            "Obtaining dependency information from %s %s",
+            name,
+            wheel.version,
+        )
+        url = link.url.split("#", 1)[0]
+        try:
+            return dist_from_wheel_url(name, url, self._session)
+        except HTTPRangeRequestUnsupported:
+            logger.debug("%s does not support range requests", url)
+            return None
+
+    def _complete_partial_requirements(
+        self,
+        partially_downloaded_reqs: Iterable[InstallRequirement],
+        parallel_builds: bool = False,
+    ) -> None:
+        """Download any requirements which were only fetched by metadata."""
+        # Download to a temporary directory. These will be copied over as
+        # needed for downstream 'download', 'wheel', and 'install' commands.
+        temp_dir = TempDirectory(kind="unpack", globally_managed=True).path
+
+        # Map each link to the requirement that owns it. This allows us to set
+        # `req.local_file_path` on the appropriate requirement after passing
+        # all the links at once into BatchDownloader.
+        links_to_fully_download: Dict[Link, InstallRequirement] = {}
+        for req in partially_downloaded_reqs:
+            assert req.link
+            links_to_fully_download[req.link] = req
+
+        batch_download = self._batch_download(
+            links_to_fully_download.keys(),
+            temp_dir,
+        )
+        for link, (filepath, _) in batch_download:
+            logger.debug("Downloading link %s to %s", link, filepath)
+            req = links_to_fully_download[link]
+            req.local_file_path = filepath
+
+        # This step is necessary to ensure all lazy wheels are processed
+        # successfully by the 'download', 'wheel', and 'install' commands.
+        for req in partially_downloaded_reqs:
+            self._prepare_linked_requirement(req, parallel_builds)
+
+    def prepare_linked_requirement(
+        self, req: InstallRequirement, parallel_builds: bool = False
+    ) -> BaseDistribution:
+        """Prepare a requirement to be obtained from req.link."""
+        assert req.link
+        self._log_preparing_link(req)
+        with indent_log():
+            # Check if the relevant file is already available
+            # in the download directory
+            file_path = None
+            if self.download_dir is not None and req.link.is_wheel:
+                hashes = self._get_linked_req_hashes(req)
+                file_path = _check_download_dir(req.link, self.download_dir, hashes)
+
+            if file_path is not None:
+                # The file is already available, so mark it as downloaded
+                self._downloaded[req.link.url] = file_path
+            else:
+                # The file is not available, attempt to fetch only metadata
+                metadata_dist = self._fetch_metadata_only(req)
+                if metadata_dist is not None:
+                    req.needs_more_preparation = True
+                    return metadata_dist
+
+            # None of the optimizations worked, fully prepare the requirement
+            return self._prepare_linked_requirement(req, parallel_builds)
+
+    def prepare_linked_requirements_more(
+        self, reqs: Iterable[InstallRequirement], parallel_builds: bool = False
+    ) -> None:
+        """Prepare linked requirements more, if needed."""
+        reqs = [req for req in reqs if req.needs_more_preparation]
+        for req in reqs:
+            # Determine if any of these requirements were already downloaded.
+            if self.download_dir is not None and req.link.is_wheel:
+                hashes = self._get_linked_req_hashes(req)
+                file_path = _check_download_dir(req.link, self.download_dir, hashes)
+                if file_path is not None:
+                    self._downloaded[req.link.url] = file_path
+                    req.needs_more_preparation = False
+
+        # Prepare requirements we found were already downloaded for some
+        # reason. The other downloads will be completed separately.
+        partially_downloaded_reqs: List[InstallRequirement] = []
+        for req in reqs:
+            if req.needs_more_preparation:
+                partially_downloaded_reqs.append(req)
+            else:
+                self._prepare_linked_requirement(req, parallel_builds)
+
+        # TODO: separate this part out from RequirementPreparer when the v1
+        # resolver can be removed!
+        self._complete_partial_requirements(
+            partially_downloaded_reqs,
+            parallel_builds=parallel_builds,
+        )
+
+    def _prepare_linked_requirement(
+        self, req: InstallRequirement, parallel_builds: bool
+    ) -> BaseDistribution:
+        assert req.link
+        link = req.link
+
+        self._ensure_link_req_src_dir(req, parallel_builds)
+        hashes = self._get_linked_req_hashes(req)
+
+        if link.is_existing_dir():
+            local_file = None
+        elif link.url not in self._downloaded:
+            try:
+                local_file = unpack_url(
+                    link,
+                    req.source_dir,
+                    self._download,
+                    self.verbosity,
+                    self.download_dir,
+                    hashes,
+                )
+            except NetworkConnectionError as exc:
+                raise InstallationError(
+                    "Could not install requirement {} because of HTTP "
+                    "error {} for URL {}".format(req, exc, link)
+                )
+        else:
+            file_path = self._downloaded[link.url]
+            if hashes:
+                hashes.check_against_path(file_path)
+            local_file = File(file_path, content_type=None)
+
+        # If download_info is set, we got it from the wheel cache.
+        if req.download_info is None:
+            # Editables don't go through this function (see
+            # prepare_editable_requirement).
+            assert not req.editable
+            req.download_info = direct_url_from_link(link, req.source_dir)
+            # Make sure we have a hash in download_info. If we got it as part of the
+            # URL, it will have been verified and we can rely on it. Otherwise we
+            # compute it from the downloaded file.
+            if (
+                isinstance(req.download_info.info, ArchiveInfo)
+                and not req.download_info.info.hash
+                and local_file
+            ):
+                hash = hash_file(local_file.path)[0].hexdigest()
+                req.download_info.info.hash = f"sha256={hash}"
+
+        # For use in later processing,
+        # preserve the file path on the requirement.
+        if local_file:
+            req.local_file_path = local_file.path
+
+        dist = _get_prepared_distribution(
+            req,
+            self.build_tracker,
+            self.finder,
+            self.build_isolation,
+            self.check_build_deps,
+        )
+        return dist
+
+    def save_linked_requirement(self, req: InstallRequirement) -> None:
+        assert self.download_dir is not None
+        assert req.link is not None
+        link = req.link
+        if link.is_vcs or (link.is_existing_dir() and req.editable):
+            # Make a .zip of the source_dir we already created.
+            req.archive(self.download_dir)
+            return
+
+        if link.is_existing_dir():
+            logger.debug(
+                "Not copying link to destination directory "
+                "since it is a directory: %s",
+                link,
+            )
+            return
+        if req.local_file_path is None:
+            # No distribution was downloaded for this requirement.
+            return
+
+        download_location = os.path.join(self.download_dir, link.filename)
+        if not os.path.exists(download_location):
+            shutil.copy(req.local_file_path, download_location)
+            download_path = display_path(download_location)
+            logger.info("Saved %s", download_path)
+
+    def prepare_editable_requirement(
+        self,
+        req: InstallRequirement,
+    ) -> BaseDistribution:
+        """Prepare an editable requirement."""
+        assert req.editable, "cannot prepare a non-editable req as editable"
+
+        logger.info("Obtaining %s", req)
+
+        with indent_log():
+            if self.require_hashes:
+                raise InstallationError(
+                    "The editable requirement {} cannot be installed when "
+                    "requiring hashes, because there is no single file to "
+                    "hash.".format(req)
+                )
+            req.ensure_has_source_dir(self.src_dir)
+            req.update_editable()
+            assert req.source_dir
+            req.download_info = direct_url_for_editable(req.unpacked_source_directory)
+
+            dist = _get_prepared_distribution(
+                req,
+                self.build_tracker,
+                self.finder,
+                self.build_isolation,
+                self.check_build_deps,
+            )
+
+            req.check_if_exists(self.use_user_site)
+
+        return dist
+
+    def prepare_installed_requirement(
+        self,
+        req: InstallRequirement,
+        skip_reason: str,
+    ) -> BaseDistribution:
+        """Prepare an already-installed requirement."""
+        assert req.satisfied_by, "req should have been satisfied but isn't"
+        assert skip_reason is not None, (
+            "did not get skip reason skipped but req.satisfied_by "
+            "is set to {}".format(req.satisfied_by)
+        )
+        logger.info(
+            "Requirement %s: %s (%s)", skip_reason, req, req.satisfied_by.version
+        )
+        with indent_log():
+            if self.require_hashes:
+                logger.debug(
+                    "Since it is already installed, we are trusting this "
+                    "package without checking its hash. To ensure a "
+                    "completely repeatable environment, install into an "
+                    "empty virtualenv."
+                )
+            return InstalledDistribution(req).get_metadata_distribution()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/pyproject.py b/venv/lib/python3.9/site-packages/pip/_internal/pyproject.py
new file mode 100644
index 0000000..1e9119f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/pyproject.py
@@ -0,0 +1,175 @@
+import importlib.util
+import os
+from collections import namedtuple
+from typing import Any, List, Optional
+
+from pip._vendor import tomli
+from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
+
+from pip._internal.exceptions import (
+    InstallationError,
+    InvalidPyProjectBuildRequires,
+    MissingPyProjectBuildRequires,
+)
+
+
+def _is_list_of_str(obj: Any) -> bool:
+    return isinstance(obj, list) and all(isinstance(item, str) for item in obj)
+
+
+def make_pyproject_path(unpacked_source_directory: str) -> str:
+    return os.path.join(unpacked_source_directory, "pyproject.toml")
+
+
+BuildSystemDetails = namedtuple(
+    "BuildSystemDetails", ["requires", "backend", "check", "backend_path"]
+)
+
+
+def load_pyproject_toml(
+    use_pep517: Optional[bool], pyproject_toml: str, setup_py: str, req_name: str
+) -> Optional[BuildSystemDetails]:
+    """Load the pyproject.toml file.
+
+    Parameters:
+        use_pep517 - Has the user requested PEP 517 processing? None
+                     means the user hasn't explicitly specified.
+        pyproject_toml - Location of the project's pyproject.toml file
+        setup_py - Location of the project's setup.py file
+        req_name - The name of the requirement we're processing (for
+                   error reporting)
+
+    Returns:
+        None if we should use the legacy code path, otherwise a tuple
+        (
+            requirements from pyproject.toml,
+            name of PEP 517 backend,
+            requirements we should check are installed after setting
+                up the build environment
+            directory paths to import the backend from (backend-path),
+                relative to the project root.
+        )
+    """
+    has_pyproject = os.path.isfile(pyproject_toml)
+    has_setup = os.path.isfile(setup_py)
+
+    if not has_pyproject and not has_setup:
+        raise InstallationError(
+            f"{req_name} does not appear to be a Python project: "
+            f"neither 'setup.py' nor 'pyproject.toml' found."
+        )
+
+    if has_pyproject:
+        with open(pyproject_toml, encoding="utf-8") as f:
+            pp_toml = tomli.loads(f.read())
+        build_system = pp_toml.get("build-system")
+    else:
+        build_system = None
+
+    # The following cases must use PEP 517
+    # We check for use_pep517 being non-None and falsey because that means
+    # the user explicitly requested --no-use-pep517.  The value 0 as
+    # opposed to False can occur when the value is provided via an
+    # environment variable or config file option (due to the quirk of
+    # strtobool() returning an integer in pip's configuration code).
+    if has_pyproject and not has_setup:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project does not have a setup.py"
+            )
+        use_pep517 = True
+    elif build_system and "build-backend" in build_system:
+        if use_pep517 is not None and not use_pep517:
+            raise InstallationError(
+                "Disabling PEP 517 processing is invalid: "
+                "project specifies a build backend of {} "
+                "in pyproject.toml".format(build_system["build-backend"])
+            )
+        use_pep517 = True
+
+    # If we haven't worked out whether to use PEP 517 yet,
+    # and the user hasn't explicitly stated a preference,
+    # we do so if the project has a pyproject.toml file
+    # or if we cannot import setuptools.
+
+    # We fallback to PEP 517 when without setuptools,
+    # so setuptools can be installed as a default build backend.
+    # For more info see:
+    # https://discuss.python.org/t/pip-without-setuptools-could-the-experience-be-improved/11810/9
+    elif use_pep517 is None:
+        use_pep517 = has_pyproject or not importlib.util.find_spec("setuptools")
+
+    # At this point, we know whether we're going to use PEP 517.
+    assert use_pep517 is not None
+
+    # If we're using the legacy code path, there is nothing further
+    # for us to do here.
+    if not use_pep517:
+        return None
+
+    if build_system is None:
+        # Either the user has a pyproject.toml with no build-system
+        # section, or the user has no pyproject.toml, but has opted in
+        # explicitly via --use-pep517.
+        # In the absence of any explicit backend specification, we
+        # assume the setuptools backend that most closely emulates the
+        # traditional direct setup.py execution, and require wheel and
+        # a version of setuptools that supports that backend.
+
+        build_system = {
+            "requires": ["setuptools>=40.8.0", "wheel"],
+            "build-backend": "setuptools.build_meta:__legacy__",
+        }
+
+    # If we're using PEP 517, we have build system information (either
+    # from pyproject.toml, or defaulted by the code above).
+    # Note that at this point, we do not know if the user has actually
+    # specified a backend, though.
+    assert build_system is not None
+
+    # Ensure that the build-system section in pyproject.toml conforms
+    # to PEP 518.
+
+    # Specifying the build-system table but not the requires key is invalid
+    if "requires" not in build_system:
+        raise MissingPyProjectBuildRequires(package=req_name)
+
+    # Error out if requires is not a list of strings
+    requires = build_system["requires"]
+    if not _is_list_of_str(requires):
+        raise InvalidPyProjectBuildRequires(
+            package=req_name,
+            reason="It is not a list of strings.",
+        )
+
+    # Each requirement must be valid as per PEP 508
+    for requirement in requires:
+        try:
+            Requirement(requirement)
+        except InvalidRequirement as error:
+            raise InvalidPyProjectBuildRequires(
+                package=req_name,
+                reason=f"It contains an invalid requirement: {requirement!r}",
+            ) from error
+
+    backend = build_system.get("build-backend")
+    backend_path = build_system.get("backend-path", [])
+    check: List[str] = []
+    if backend is None:
+        # If the user didn't specify a backend, we assume they want to use
+        # the setuptools backend. But we can't be sure they have included
+        # a version of setuptools which supplies the backend, or wheel
+        # (which is needed by the backend) in their requirements. So we
+        # make a note to check that those requirements are present once
+        # we have set up the environment.
+        # This is quite a lot of work to check for a very specific case. But
+        # the problem is, that case is potentially quite common - projects that
+        # adopted PEP 518 early for the ability to specify requirements to
+        # execute setup.py, but never considered needing to mention the build
+        # tools themselves. The original PEP 518 code had a similar check (but
+        # implemented in a different way).
+        backend = "setuptools.build_meta:__legacy__"
+        check = ["setuptools>=40.8.0", "wheel"]
+
+    return BuildSystemDetails(requires, backend, check, backend_path)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/req/__init__.py
new file mode 100644
index 0000000..8d56359
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/__init__.py
@@ -0,0 +1,94 @@
+import collections
+import logging
+from typing import Generator, List, Optional, Sequence, Tuple
+
+from pip._internal.utils.logging import indent_log
+
+from .req_file import parse_requirements
+from .req_install import InstallRequirement
+from .req_set import RequirementSet
+
+__all__ = [
+    "RequirementSet",
+    "InstallRequirement",
+    "parse_requirements",
+    "install_given_reqs",
+]
+
+logger = logging.getLogger(__name__)
+
+
+class InstallationResult:
+    def __init__(self, name: str) -> None:
+        self.name = name
+
+    def __repr__(self) -> str:
+        return f"InstallationResult(name={self.name!r})"
+
+
+def _validate_requirements(
+    requirements: List[InstallRequirement],
+) -> Generator[Tuple[str, InstallRequirement], None, None]:
+    for req in requirements:
+        assert req.name, f"invalid to-be-installed requirement: {req}"
+        yield req.name, req
+
+
+def install_given_reqs(
+    requirements: List[InstallRequirement],
+    install_options: List[str],
+    global_options: Sequence[str],
+    root: Optional[str],
+    home: Optional[str],
+    prefix: Optional[str],
+    warn_script_location: bool,
+    use_user_site: bool,
+    pycompile: bool,
+) -> List[InstallationResult]:
+    """
+    Install everything in the given list.
+
+    (to be called after having downloaded and unpacked the packages)
+    """
+    to_install = collections.OrderedDict(_validate_requirements(requirements))
+
+    if to_install:
+        logger.info(
+            "Installing collected packages: %s",
+            ", ".join(to_install.keys()),
+        )
+
+    installed = []
+
+    with indent_log():
+        for req_name, requirement in to_install.items():
+            if requirement.should_reinstall:
+                logger.info("Attempting uninstall: %s", req_name)
+                with indent_log():
+                    uninstalled_pathset = requirement.uninstall(auto_confirm=True)
+            else:
+                uninstalled_pathset = None
+
+            try:
+                requirement.install(
+                    install_options,
+                    global_options,
+                    root=root,
+                    home=home,
+                    prefix=prefix,
+                    warn_script_location=warn_script_location,
+                    use_user_site=use_user_site,
+                    pycompile=pycompile,
+                )
+            except Exception:
+                # if install did not succeed, rollback previous uninstall
+                if uninstalled_pathset and not requirement.install_succeeded:
+                    uninstalled_pathset.rollback()
+                raise
+            else:
+                if uninstalled_pathset and requirement.install_succeeded:
+                    uninstalled_pathset.commit()
+
+            installed.append(InstallationResult(req_name))
+
+    return installed
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/req/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/__pycache__/req_uninstall.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/req/__pycache__/req_uninstall.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/constructors.py b/venv/lib/python3.9/site-packages/pip/_internal/req/constructors.py
new file mode 100644
index 0000000..dea7c3b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/constructors.py
@@ -0,0 +1,501 @@
+"""Backing implementation for InstallRequirement's various constructors
+
+The idea here is that these formed a major chunk of InstallRequirement's size
+so, moving them and support code dedicated to them outside of that class
+helps creates for better understandability for the rest of the code.
+
+These are meant to be used elsewhere within pip to create instances of
+InstallRequirement.
+"""
+
+import logging
+import os
+import re
+from typing import Any, Dict, Optional, Set, Tuple, Union
+
+from pip._vendor.packaging.markers import Marker
+from pip._vendor.packaging.requirements import InvalidRequirement, Requirement
+from pip._vendor.packaging.specifiers import Specifier
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.models.index import PyPI, TestPyPI
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.req.req_file import ParsedRequirement
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.filetypes import is_archive_file
+from pip._internal.utils.misc import is_installable_dir
+from pip._internal.utils.packaging import get_requirement
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs import is_url, vcs
+
+__all__ = [
+    "install_req_from_editable",
+    "install_req_from_line",
+    "parse_editable",
+]
+
+logger = logging.getLogger(__name__)
+operators = Specifier._operators.keys()
+
+
+def _strip_extras(path: str) -> Tuple[str, Optional[str]]:
+    m = re.match(r"^(.+)(\[[^\]]+\])$", path)
+    extras = None
+    if m:
+        path_no_extras = m.group(1)
+        extras = m.group(2)
+    else:
+        path_no_extras = path
+
+    return path_no_extras, extras
+
+
+def convert_extras(extras: Optional[str]) -> Set[str]:
+    if not extras:
+        return set()
+    return get_requirement("placeholder" + extras.lower()).extras
+
+
+def parse_editable(editable_req: str) -> Tuple[Optional[str], str, Set[str]]:
+    """Parses an editable requirement into:
+        - a requirement name
+        - an URL
+        - extras
+        - editable options
+    Accepted requirements:
+        svn+http://blahblah@rev#egg=Foobar[baz]&subdirectory=version_subdir
+        .[some_extra]
+    """
+
+    url = editable_req
+
+    # If a file path is specified with extras, strip off the extras.
+    url_no_extras, extras = _strip_extras(url)
+
+    if os.path.isdir(url_no_extras):
+        # Treating it as code that has already been checked out
+        url_no_extras = path_to_url(url_no_extras)
+
+    if url_no_extras.lower().startswith("file:"):
+        package_name = Link(url_no_extras).egg_fragment
+        if extras:
+            return (
+                package_name,
+                url_no_extras,
+                get_requirement("placeholder" + extras.lower()).extras,
+            )
+        else:
+            return package_name, url_no_extras, set()
+
+    for version_control in vcs:
+        if url.lower().startswith(f"{version_control}:"):
+            url = f"{version_control}+{url}"
+            break
+
+    link = Link(url)
+
+    if not link.is_vcs:
+        backends = ", ".join(vcs.all_schemes)
+        raise InstallationError(
+            f"{editable_req} is not a valid editable requirement. "
+            f"It should either be a path to a local project or a VCS URL "
+            f"(beginning with {backends})."
+        )
+
+    package_name = link.egg_fragment
+    if not package_name:
+        raise InstallationError(
+            "Could not detect requirement name for '{}', please specify one "
+            "with #egg=your_package_name".format(editable_req)
+        )
+    return package_name, url, set()
+
+
+def check_first_requirement_in_file(filename: str) -> None:
+    """Check if file is parsable as a requirements file.
+
+    This is heavily based on ``pkg_resources.parse_requirements``, but
+    simplified to just check the first meaningful line.
+
+    :raises InvalidRequirement: If the first meaningful line cannot be parsed
+        as an requirement.
+    """
+    with open(filename, encoding="utf-8", errors="ignore") as f:
+        # Create a steppable iterator, so we can handle \-continuations.
+        lines = (
+            line
+            for line in (line.strip() for line in f)
+            if line and not line.startswith("#")  # Skip blank lines/comments.
+        )
+
+        for line in lines:
+            # Drop comments -- a hash without a space may be in a URL.
+            if " #" in line:
+                line = line[: line.find(" #")]
+            # If there is a line continuation, drop it, and append the next line.
+            if line.endswith("\\"):
+                line = line[:-2].strip() + next(lines, "")
+            Requirement(line)
+            return
+
+
+def deduce_helpful_msg(req: str) -> str:
+    """Returns helpful msg in case requirements file does not exist,
+    or cannot be parsed.
+
+    :params req: Requirements file path
+    """
+    if not os.path.exists(req):
+        return f" File '{req}' does not exist."
+    msg = " The path does exist. "
+    # Try to parse and check if it is a requirements file.
+    try:
+        check_first_requirement_in_file(req)
+    except InvalidRequirement:
+        logger.debug("Cannot parse '%s' as requirements file", req)
+    else:
+        msg += (
+            f"The argument you provided "
+            f"({req}) appears to be a"
+            f" requirements file. If that is the"
+            f" case, use the '-r' flag to install"
+            f" the packages specified within it."
+        )
+    return msg
+
+
+class RequirementParts:
+    def __init__(
+        self,
+        requirement: Optional[Requirement],
+        link: Optional[Link],
+        markers: Optional[Marker],
+        extras: Set[str],
+    ):
+        self.requirement = requirement
+        self.link = link
+        self.markers = markers
+        self.extras = extras
+
+
+def parse_req_from_editable(editable_req: str) -> RequirementParts:
+    name, url, extras_override = parse_editable(editable_req)
+
+    if name is not None:
+        try:
+            req: Optional[Requirement] = Requirement(name)
+        except InvalidRequirement:
+            raise InstallationError(f"Invalid requirement: '{name}'")
+    else:
+        req = None
+
+    link = Link(url)
+
+    return RequirementParts(req, link, None, extras_override)
+
+
+# ---- The actual constructors follow ----
+
+
+def install_req_from_editable(
+    editable_req: str,
+    comes_from: Optional[Union[InstallRequirement, str]] = None,
+    use_pep517: Optional[bool] = None,
+    isolated: bool = False,
+    options: Optional[Dict[str, Any]] = None,
+    constraint: bool = False,
+    user_supplied: bool = False,
+    permit_editable_wheels: bool = False,
+    config_settings: Optional[Dict[str, str]] = None,
+) -> InstallRequirement:
+
+    parts = parse_req_from_editable(editable_req)
+
+    return InstallRequirement(
+        parts.requirement,
+        comes_from=comes_from,
+        user_supplied=user_supplied,
+        editable=True,
+        permit_editable_wheels=permit_editable_wheels,
+        link=parts.link,
+        constraint=constraint,
+        use_pep517=use_pep517,
+        isolated=isolated,
+        install_options=options.get("install_options", []) if options else [],
+        global_options=options.get("global_options", []) if options else [],
+        hash_options=options.get("hashes", {}) if options else {},
+        config_settings=config_settings,
+        extras=parts.extras,
+    )
+
+
+def _looks_like_path(name: str) -> bool:
+    """Checks whether the string "looks like" a path on the filesystem.
+
+    This does not check whether the target actually exists, only judge from the
+    appearance.
+
+    Returns true if any of the following conditions is true:
+    * a path separator is found (either os.path.sep or os.path.altsep);
+    * a dot is found (which represents the current directory).
+    """
+    if os.path.sep in name:
+        return True
+    if os.path.altsep is not None and os.path.altsep in name:
+        return True
+    if name.startswith("."):
+        return True
+    return False
+
+
+def _get_url_from_path(path: str, name: str) -> Optional[str]:
+    """
+    First, it checks whether a provided path is an installable directory. If it
+    is, returns the path.
+
+    If false, check if the path is an archive file (such as a .whl).
+    The function checks if the path is a file. If false, if the path has
+    an @, it will treat it as a PEP 440 URL requirement and return the path.
+    """
+    if _looks_like_path(name) and os.path.isdir(path):
+        if is_installable_dir(path):
+            return path_to_url(path)
+        # TODO: The is_installable_dir test here might not be necessary
+        #       now that it is done in load_pyproject_toml too.
+        raise InstallationError(
+            f"Directory {name!r} is not installable. Neither 'setup.py' "
+            "nor 'pyproject.toml' found."
+        )
+    if not is_archive_file(path):
+        return None
+    if os.path.isfile(path):
+        return path_to_url(path)
+    urlreq_parts = name.split("@", 1)
+    if len(urlreq_parts) >= 2 and not _looks_like_path(urlreq_parts[0]):
+        # If the path contains '@' and the part before it does not look
+        # like a path, try to treat it as a PEP 440 URL req instead.
+        return None
+    logger.warning(
+        "Requirement %r looks like a filename, but the file does not exist",
+        name,
+    )
+    return path_to_url(path)
+
+
+def parse_req_from_line(name: str, line_source: Optional[str]) -> RequirementParts:
+    if is_url(name):
+        marker_sep = "; "
+    else:
+        marker_sep = ";"
+    if marker_sep in name:
+        name, markers_as_string = name.split(marker_sep, 1)
+        markers_as_string = markers_as_string.strip()
+        if not markers_as_string:
+            markers = None
+        else:
+            markers = Marker(markers_as_string)
+    else:
+        markers = None
+    name = name.strip()
+    req_as_string = None
+    path = os.path.normpath(os.path.abspath(name))
+    link = None
+    extras_as_string = None
+
+    if is_url(name):
+        link = Link(name)
+    else:
+        p, extras_as_string = _strip_extras(path)
+        url = _get_url_from_path(p, name)
+        if url is not None:
+            link = Link(url)
+
+    # it's a local file, dir, or url
+    if link:
+        # Handle relative file URLs
+        if link.scheme == "file" and re.search(r"\.\./", link.url):
+            link = Link(path_to_url(os.path.normpath(os.path.abspath(link.path))))
+        # wheel file
+        if link.is_wheel:
+            wheel = Wheel(link.filename)  # can raise InvalidWheelFilename
+            req_as_string = f"{wheel.name}=={wheel.version}"
+        else:
+            # set the req to the egg fragment.  when it's not there, this
+            # will become an 'unnamed' requirement
+            req_as_string = link.egg_fragment
+
+    # a requirement specifier
+    else:
+        req_as_string = name
+
+    extras = convert_extras(extras_as_string)
+
+    def with_source(text: str) -> str:
+        if not line_source:
+            return text
+        return f"{text} (from {line_source})"
+
+    def _parse_req_string(req_as_string: str) -> Requirement:
+        try:
+            req = get_requirement(req_as_string)
+        except InvalidRequirement:
+            if os.path.sep in req_as_string:
+                add_msg = "It looks like a path."
+                add_msg += deduce_helpful_msg(req_as_string)
+            elif "=" in req_as_string and not any(
+                op in req_as_string for op in operators
+            ):
+                add_msg = "= is not a valid operator. Did you mean == ?"
+            else:
+                add_msg = ""
+            msg = with_source(f"Invalid requirement: {req_as_string!r}")
+            if add_msg:
+                msg += f"\nHint: {add_msg}"
+            raise InstallationError(msg)
+        else:
+            # Deprecate extras after specifiers: "name>=1.0[extras]"
+            # This currently works by accident because _strip_extras() parses
+            # any extras in the end of the string and those are saved in
+            # RequirementParts
+            for spec in req.specifier:
+                spec_str = str(spec)
+                if spec_str.endswith("]"):
+                    msg = f"Extras after version '{spec_str}'."
+                    raise InstallationError(msg)
+        return req
+
+    if req_as_string is not None:
+        req: Optional[Requirement] = _parse_req_string(req_as_string)
+    else:
+        req = None
+
+    return RequirementParts(req, link, markers, extras)
+
+
+def install_req_from_line(
+    name: str,
+    comes_from: Optional[Union[str, InstallRequirement]] = None,
+    use_pep517: Optional[bool] = None,
+    isolated: bool = False,
+    options: Optional[Dict[str, Any]] = None,
+    constraint: bool = False,
+    line_source: Optional[str] = None,
+    user_supplied: bool = False,
+    config_settings: Optional[Dict[str, str]] = None,
+) -> InstallRequirement:
+    """Creates an InstallRequirement from a name, which might be a
+    requirement, directory containing 'setup.py', filename, or URL.
+
+    :param line_source: An optional string describing where the line is from,
+        for logging purposes in case of an error.
+    """
+    parts = parse_req_from_line(name, line_source)
+
+    return InstallRequirement(
+        parts.requirement,
+        comes_from,
+        link=parts.link,
+        markers=parts.markers,
+        use_pep517=use_pep517,
+        isolated=isolated,
+        install_options=options.get("install_options", []) if options else [],
+        global_options=options.get("global_options", []) if options else [],
+        hash_options=options.get("hashes", {}) if options else {},
+        config_settings=config_settings,
+        constraint=constraint,
+        extras=parts.extras,
+        user_supplied=user_supplied,
+    )
+
+
+def install_req_from_req_string(
+    req_string: str,
+    comes_from: Optional[InstallRequirement] = None,
+    isolated: bool = False,
+    use_pep517: Optional[bool] = None,
+    user_supplied: bool = False,
+    config_settings: Optional[Dict[str, str]] = None,
+) -> InstallRequirement:
+    try:
+        req = get_requirement(req_string)
+    except InvalidRequirement:
+        raise InstallationError(f"Invalid requirement: '{req_string}'")
+
+    domains_not_allowed = [
+        PyPI.file_storage_domain,
+        TestPyPI.file_storage_domain,
+    ]
+    if (
+        req.url
+        and comes_from
+        and comes_from.link
+        and comes_from.link.netloc in domains_not_allowed
+    ):
+        # Explicitly disallow pypi packages that depend on external urls
+        raise InstallationError(
+            "Packages installed from PyPI cannot depend on packages "
+            "which are not also hosted on PyPI.\n"
+            "{} depends on {} ".format(comes_from.name, req)
+        )
+
+    return InstallRequirement(
+        req,
+        comes_from,
+        isolated=isolated,
+        use_pep517=use_pep517,
+        user_supplied=user_supplied,
+        config_settings=config_settings,
+    )
+
+
+def install_req_from_parsed_requirement(
+    parsed_req: ParsedRequirement,
+    isolated: bool = False,
+    use_pep517: Optional[bool] = None,
+    user_supplied: bool = False,
+    config_settings: Optional[Dict[str, str]] = None,
+) -> InstallRequirement:
+    if parsed_req.is_editable:
+        req = install_req_from_editable(
+            parsed_req.requirement,
+            comes_from=parsed_req.comes_from,
+            use_pep517=use_pep517,
+            constraint=parsed_req.constraint,
+            isolated=isolated,
+            user_supplied=user_supplied,
+            config_settings=config_settings,
+        )
+
+    else:
+        req = install_req_from_line(
+            parsed_req.requirement,
+            comes_from=parsed_req.comes_from,
+            use_pep517=use_pep517,
+            isolated=isolated,
+            options=parsed_req.options,
+            constraint=parsed_req.constraint,
+            line_source=parsed_req.line_source,
+            user_supplied=user_supplied,
+            config_settings=config_settings,
+        )
+    return req
+
+
+def install_req_from_link_and_ireq(
+    link: Link, ireq: InstallRequirement
+) -> InstallRequirement:
+    return InstallRequirement(
+        req=ireq.req,
+        comes_from=ireq.comes_from,
+        editable=ireq.editable,
+        link=link,
+        markers=ireq.markers,
+        use_pep517=ireq.use_pep517,
+        isolated=ireq.isolated,
+        install_options=ireq.install_options,
+        global_options=ireq.global_options,
+        hash_options=ireq.hash_options,
+        config_settings=ireq.config_settings,
+        user_supplied=ireq.user_supplied,
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/req_file.py b/venv/lib/python3.9/site-packages/pip/_internal/req/req_file.py
new file mode 100644
index 0000000..11ec699
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/req_file.py
@@ -0,0 +1,544 @@
+"""
+Requirements file parsing
+"""
+
+import optparse
+import os
+import re
+import shlex
+import urllib.parse
+from optparse import Values
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Generator,
+    Iterable,
+    List,
+    Optional,
+    Tuple,
+)
+
+from pip._internal.cli import cmdoptions
+from pip._internal.exceptions import InstallationError, RequirementsFileParseError
+from pip._internal.models.search_scope import SearchScope
+from pip._internal.network.session import PipSession
+from pip._internal.network.utils import raise_for_status
+from pip._internal.utils.encoding import auto_decode
+from pip._internal.utils.urls import get_url_scheme
+
+if TYPE_CHECKING:
+    # NoReturn introduced in 3.6.2; imported only for type checking to maintain
+    # pip compatibility with older patch versions of Python 3.6
+    from typing import NoReturn
+
+    from pip._internal.index.package_finder import PackageFinder
+
+__all__ = ["parse_requirements"]
+
+ReqFileLines = Iterable[Tuple[int, str]]
+
+LineParser = Callable[[str], Tuple[str, Values]]
+
+SCHEME_RE = re.compile(r"^(http|https|file):", re.I)
+COMMENT_RE = re.compile(r"(^|\s+)#.*$")
+
+# Matches environment variable-style values in '${MY_VARIABLE_1}' with the
+# variable name consisting of only uppercase letters, digits or the '_'
+# (underscore). This follows the POSIX standard defined in IEEE Std 1003.1,
+# 2013 Edition.
+ENV_VAR_RE = re.compile(r"(?P<var>\$\{(?P<name>[A-Z0-9_]+)\})")
+
+SUPPORTED_OPTIONS: List[Callable[..., optparse.Option]] = [
+    cmdoptions.index_url,
+    cmdoptions.extra_index_url,
+    cmdoptions.no_index,
+    cmdoptions.constraints,
+    cmdoptions.requirements,
+    cmdoptions.editable,
+    cmdoptions.find_links,
+    cmdoptions.no_binary,
+    cmdoptions.only_binary,
+    cmdoptions.prefer_binary,
+    cmdoptions.require_hashes,
+    cmdoptions.pre,
+    cmdoptions.trusted_host,
+    cmdoptions.use_new_feature,
+]
+
+# options to be passed to requirements
+SUPPORTED_OPTIONS_REQ: List[Callable[..., optparse.Option]] = [
+    cmdoptions.install_options,
+    cmdoptions.global_options,
+    cmdoptions.hash,
+]
+
+# the 'dest' string values
+SUPPORTED_OPTIONS_REQ_DEST = [str(o().dest) for o in SUPPORTED_OPTIONS_REQ]
+
+
+class ParsedRequirement:
+    def __init__(
+        self,
+        requirement: str,
+        is_editable: bool,
+        comes_from: str,
+        constraint: bool,
+        options: Optional[Dict[str, Any]] = None,
+        line_source: Optional[str] = None,
+    ) -> None:
+        self.requirement = requirement
+        self.is_editable = is_editable
+        self.comes_from = comes_from
+        self.options = options
+        self.constraint = constraint
+        self.line_source = line_source
+
+
+class ParsedLine:
+    def __init__(
+        self,
+        filename: str,
+        lineno: int,
+        args: str,
+        opts: Values,
+        constraint: bool,
+    ) -> None:
+        self.filename = filename
+        self.lineno = lineno
+        self.opts = opts
+        self.constraint = constraint
+
+        if args:
+            self.is_requirement = True
+            self.is_editable = False
+            self.requirement = args
+        elif opts.editables:
+            self.is_requirement = True
+            self.is_editable = True
+            # We don't support multiple -e on one line
+            self.requirement = opts.editables[0]
+        else:
+            self.is_requirement = False
+
+
+def parse_requirements(
+    filename: str,
+    session: PipSession,
+    finder: Optional["PackageFinder"] = None,
+    options: Optional[optparse.Values] = None,
+    constraint: bool = False,
+) -> Generator[ParsedRequirement, None, None]:
+    """Parse a requirements file and yield ParsedRequirement instances.
+
+    :param filename:    Path or url of requirements file.
+    :param session:     PipSession instance.
+    :param finder:      Instance of pip.index.PackageFinder.
+    :param options:     cli options.
+    :param constraint:  If true, parsing a constraint file rather than
+        requirements file.
+    """
+    line_parser = get_line_parser(finder)
+    parser = RequirementsFileParser(session, line_parser)
+
+    for parsed_line in parser.parse(filename, constraint):
+        parsed_req = handle_line(
+            parsed_line, options=options, finder=finder, session=session
+        )
+        if parsed_req is not None:
+            yield parsed_req
+
+
+def preprocess(content: str) -> ReqFileLines:
+    """Split, filter, and join lines, and return a line iterator
+
+    :param content: the content of the requirements file
+    """
+    lines_enum: ReqFileLines = enumerate(content.splitlines(), start=1)
+    lines_enum = join_lines(lines_enum)
+    lines_enum = ignore_comments(lines_enum)
+    lines_enum = expand_env_variables(lines_enum)
+    return lines_enum
+
+
+def handle_requirement_line(
+    line: ParsedLine,
+    options: Optional[optparse.Values] = None,
+) -> ParsedRequirement:
+
+    # preserve for the nested code path
+    line_comes_from = "{} {} (line {})".format(
+        "-c" if line.constraint else "-r",
+        line.filename,
+        line.lineno,
+    )
+
+    assert line.is_requirement
+
+    if line.is_editable:
+        # For editable requirements, we don't support per-requirement
+        # options, so just return the parsed requirement.
+        return ParsedRequirement(
+            requirement=line.requirement,
+            is_editable=line.is_editable,
+            comes_from=line_comes_from,
+            constraint=line.constraint,
+        )
+    else:
+        # get the options that apply to requirements
+        req_options = {}
+        for dest in SUPPORTED_OPTIONS_REQ_DEST:
+            if dest in line.opts.__dict__ and line.opts.__dict__[dest]:
+                req_options[dest] = line.opts.__dict__[dest]
+
+        line_source = f"line {line.lineno} of {line.filename}"
+        return ParsedRequirement(
+            requirement=line.requirement,
+            is_editable=line.is_editable,
+            comes_from=line_comes_from,
+            constraint=line.constraint,
+            options=req_options,
+            line_source=line_source,
+        )
+
+
+def handle_option_line(
+    opts: Values,
+    filename: str,
+    lineno: int,
+    finder: Optional["PackageFinder"] = None,
+    options: Optional[optparse.Values] = None,
+    session: Optional[PipSession] = None,
+) -> None:
+
+    if options:
+        # percolate options upward
+        if opts.require_hashes:
+            options.require_hashes = opts.require_hashes
+        if opts.features_enabled:
+            options.features_enabled.extend(
+                f for f in opts.features_enabled if f not in options.features_enabled
+            )
+
+    # set finder options
+    if finder:
+        find_links = finder.find_links
+        index_urls = finder.index_urls
+        no_index = finder.search_scope.no_index
+        if opts.no_index is True:
+            no_index = True
+            index_urls = []
+        if opts.index_url and not no_index:
+            index_urls = [opts.index_url]
+        if opts.extra_index_urls and not no_index:
+            index_urls.extend(opts.extra_index_urls)
+        if opts.find_links:
+            # FIXME: it would be nice to keep track of the source
+            # of the find_links: support a find-links local path
+            # relative to a requirements file.
+            value = opts.find_links[0]
+            req_dir = os.path.dirname(os.path.abspath(filename))
+            relative_to_reqs_file = os.path.join(req_dir, value)
+            if os.path.exists(relative_to_reqs_file):
+                value = relative_to_reqs_file
+            find_links.append(value)
+
+        if session:
+            # We need to update the auth urls in session
+            session.update_index_urls(index_urls)
+
+        search_scope = SearchScope(
+            find_links=find_links,
+            index_urls=index_urls,
+            no_index=no_index,
+        )
+        finder.search_scope = search_scope
+
+        if opts.pre:
+            finder.set_allow_all_prereleases()
+
+        if opts.prefer_binary:
+            finder.set_prefer_binary()
+
+        if session:
+            for host in opts.trusted_hosts or []:
+                source = f"line {lineno} of {filename}"
+                session.add_trusted_host(host, source=source)
+
+
+def handle_line(
+    line: ParsedLine,
+    options: Optional[optparse.Values] = None,
+    finder: Optional["PackageFinder"] = None,
+    session: Optional[PipSession] = None,
+) -> Optional[ParsedRequirement]:
+    """Handle a single parsed requirements line; This can result in
+    creating/yielding requirements, or updating the finder.
+
+    :param line:        The parsed line to be processed.
+    :param options:     CLI options.
+    :param finder:      The finder - updated by non-requirement lines.
+    :param session:     The session - updated by non-requirement lines.
+
+    Returns a ParsedRequirement object if the line is a requirement line,
+    otherwise returns None.
+
+    For lines that contain requirements, the only options that have an effect
+    are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
+    requirement. Other options from SUPPORTED_OPTIONS may be present, but are
+    ignored.
+
+    For lines that do not contain requirements, the only options that have an
+    effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
+    be present, but are ignored. These lines may contain multiple options
+    (although our docs imply only one is supported), and all our parsed and
+    affect the finder.
+    """
+
+    if line.is_requirement:
+        parsed_req = handle_requirement_line(line, options)
+        return parsed_req
+    else:
+        handle_option_line(
+            line.opts,
+            line.filename,
+            line.lineno,
+            finder,
+            options,
+            session,
+        )
+        return None
+
+
+class RequirementsFileParser:
+    def __init__(
+        self,
+        session: PipSession,
+        line_parser: LineParser,
+    ) -> None:
+        self._session = session
+        self._line_parser = line_parser
+
+    def parse(
+        self, filename: str, constraint: bool
+    ) -> Generator[ParsedLine, None, None]:
+        """Parse a given file, yielding parsed lines."""
+        yield from self._parse_and_recurse(filename, constraint)
+
+    def _parse_and_recurse(
+        self, filename: str, constraint: bool
+    ) -> Generator[ParsedLine, None, None]:
+        for line in self._parse_file(filename, constraint):
+            if not line.is_requirement and (
+                line.opts.requirements or line.opts.constraints
+            ):
+                # parse a nested requirements file
+                if line.opts.requirements:
+                    req_path = line.opts.requirements[0]
+                    nested_constraint = False
+                else:
+                    req_path = line.opts.constraints[0]
+                    nested_constraint = True
+
+                # original file is over http
+                if SCHEME_RE.search(filename):
+                    # do a url join so relative paths work
+                    req_path = urllib.parse.urljoin(filename, req_path)
+                # original file and nested file are paths
+                elif not SCHEME_RE.search(req_path):
+                    # do a join so relative paths work
+                    req_path = os.path.join(
+                        os.path.dirname(filename),
+                        req_path,
+                    )
+
+                yield from self._parse_and_recurse(req_path, nested_constraint)
+            else:
+                yield line
+
+    def _parse_file(
+        self, filename: str, constraint: bool
+    ) -> Generator[ParsedLine, None, None]:
+        _, content = get_file_content(filename, self._session)
+
+        lines_enum = preprocess(content)
+
+        for line_number, line in lines_enum:
+            try:
+                args_str, opts = self._line_parser(line)
+            except OptionParsingError as e:
+                # add offending line
+                msg = f"Invalid requirement: {line}\n{e.msg}"
+                raise RequirementsFileParseError(msg)
+
+            yield ParsedLine(
+                filename,
+                line_number,
+                args_str,
+                opts,
+                constraint,
+            )
+
+
+def get_line_parser(finder: Optional["PackageFinder"]) -> LineParser:
+    def parse_line(line: str) -> Tuple[str, Values]:
+        # Build new parser for each line since it accumulates appendable
+        # options.
+        parser = build_parser()
+        defaults = parser.get_default_values()
+        defaults.index_url = None
+        if finder:
+            defaults.format_control = finder.format_control
+
+        args_str, options_str = break_args_options(line)
+
+        try:
+            options = shlex.split(options_str)
+        except ValueError as e:
+            raise OptionParsingError(f"Could not split options: {options_str}") from e
+
+        opts, _ = parser.parse_args(options, defaults)
+
+        return args_str, opts
+
+    return parse_line
+
+
+def break_args_options(line: str) -> Tuple[str, str]:
+    """Break up the line into an args and options string.  We only want to shlex
+    (and then optparse) the options, not the args.  args can contain markers
+    which are corrupted by shlex.
+    """
+    tokens = line.split(" ")
+    args = []
+    options = tokens[:]
+    for token in tokens:
+        if token.startswith("-") or token.startswith("--"):
+            break
+        else:
+            args.append(token)
+            options.pop(0)
+    return " ".join(args), " ".join(options)
+
+
+class OptionParsingError(Exception):
+    def __init__(self, msg: str) -> None:
+        self.msg = msg
+
+
+def build_parser() -> optparse.OptionParser:
+    """
+    Return a parser for parsing requirement lines
+    """
+    parser = optparse.OptionParser(add_help_option=False)
+
+    option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ
+    for option_factory in option_factories:
+        option = option_factory()
+        parser.add_option(option)
+
+    # By default optparse sys.exits on parsing errors. We want to wrap
+    # that in our own exception.
+    def parser_exit(self: Any, msg: str) -> "NoReturn":
+        raise OptionParsingError(msg)
+
+    # NOTE: mypy disallows assigning to a method
+    #       https://github.com/python/mypy/issues/2427
+    parser.exit = parser_exit  # type: ignore
+
+    return parser
+
+
+def join_lines(lines_enum: ReqFileLines) -> ReqFileLines:
+    """Joins a line ending in '\' with the previous line (except when following
+    comments).  The joined line takes on the index of the first line.
+    """
+    primary_line_number = None
+    new_line: List[str] = []
+    for line_number, line in lines_enum:
+        if not line.endswith("\\") or COMMENT_RE.match(line):
+            if COMMENT_RE.match(line):
+                # this ensures comments are always matched later
+                line = " " + line
+            if new_line:
+                new_line.append(line)
+                assert primary_line_number is not None
+                yield primary_line_number, "".join(new_line)
+                new_line = []
+            else:
+                yield line_number, line
+        else:
+            if not new_line:
+                primary_line_number = line_number
+            new_line.append(line.strip("\\"))
+
+    # last line contains \
+    if new_line:
+        assert primary_line_number is not None
+        yield primary_line_number, "".join(new_line)
+
+    # TODO: handle space after '\'.
+
+
+def ignore_comments(lines_enum: ReqFileLines) -> ReqFileLines:
+    """
+    Strips comments and filter empty lines.
+    """
+    for line_number, line in lines_enum:
+        line = COMMENT_RE.sub("", line)
+        line = line.strip()
+        if line:
+            yield line_number, line
+
+
+def expand_env_variables(lines_enum: ReqFileLines) -> ReqFileLines:
+    """Replace all environment variables that can be retrieved via `os.getenv`.
+
+    The only allowed format for environment variables defined in the
+    requirement file is `${MY_VARIABLE_1}` to ensure two things:
+
+    1. Strings that contain a `$` aren't accidentally (partially) expanded.
+    2. Ensure consistency across platforms for requirement files.
+
+    These points are the result of a discussion on the `github pull
+    request #3514 <https://github.com/pypa/pip/pull/3514>`_.
+
+    Valid characters in variable names follow the `POSIX standard
+    <http://pubs.opengroup.org/onlinepubs/9699919799/>`_ and are limited
+    to uppercase letter, digits and the `_` (underscore).
+    """
+    for line_number, line in lines_enum:
+        for env_var, var_name in ENV_VAR_RE.findall(line):
+            value = os.getenv(var_name)
+            if not value:
+                continue
+
+            line = line.replace(env_var, value)
+
+        yield line_number, line
+
+
+def get_file_content(url: str, session: PipSession) -> Tuple[str, str]:
+    """Gets the content of a file; it may be a filename, file: URL, or
+    http: URL.  Returns (location, content).  Content is unicode.
+    Respects # -*- coding: declarations on the retrieved files.
+
+    :param url:         File path or url.
+    :param session:     PipSession instance.
+    """
+    scheme = get_url_scheme(url)
+
+    # Pip has special support for file:// URLs (LocalFSAdapter).
+    if scheme in ["http", "https", "file"]:
+        resp = session.get(url)
+        raise_for_status(resp)
+        return resp.url, resp.text
+
+    # Assume this is a bare path.
+    try:
+        with open(url, "rb") as f:
+            content = auto_decode(f.read())
+    except OSError as exc:
+        raise InstallationError(f"Could not open requirements file: {exc}")
+    return url, content
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/req_install.py b/venv/lib/python3.9/site-packages/pip/_internal/req/req_install.py
new file mode 100644
index 0000000..5f29261
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/req_install.py
@@ -0,0 +1,942 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import functools
+import logging
+import os
+import shutil
+import sys
+import uuid
+import zipfile
+from enum import Enum
+from optparse import Values
+from typing import Any, Collection, Dict, Iterable, List, Optional, Sequence, Union
+
+from pip._vendor.packaging.markers import Marker
+from pip._vendor.packaging.requirements import Requirement
+from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.packaging.version import Version
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.pep517.wrappers import Pep517HookCaller
+
+from pip._internal.build_env import BuildEnvironment, NoOpBuildEnvironment
+from pip._internal.exceptions import InstallationError, LegacyInstallFailure
+from pip._internal.locations import get_scheme
+from pip._internal.metadata import (
+    BaseDistribution,
+    get_default_environment,
+    get_directory_distribution,
+    get_wheel_distribution,
+)
+from pip._internal.metadata.base import FilesystemWheel
+from pip._internal.models.direct_url import DirectUrl
+from pip._internal.models.link import Link
+from pip._internal.operations.build.metadata import generate_metadata
+from pip._internal.operations.build.metadata_editable import generate_editable_metadata
+from pip._internal.operations.build.metadata_legacy import (
+    generate_metadata as generate_metadata_legacy,
+)
+from pip._internal.operations.install.editable_legacy import (
+    install_editable as install_editable_legacy,
+)
+from pip._internal.operations.install.legacy import install as install_legacy
+from pip._internal.operations.install.wheel import install_wheel
+from pip._internal.pyproject import load_pyproject_toml, make_pyproject_path
+from pip._internal.req.req_uninstall import UninstallPathSet
+from pip._internal.utils.deprecation import LegacyInstallReason, deprecated
+from pip._internal.utils.direct_url_helpers import (
+    direct_url_for_editable,
+    direct_url_from_link,
+)
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.misc import (
+    ConfiguredPep517HookCaller,
+    ask_path_exists,
+    backup_dir,
+    display_path,
+    hide_url,
+    redact_auth_from_url,
+)
+from pip._internal.utils.packaging import safe_extra
+from pip._internal.utils.subprocess import runner_with_spinner_message
+from pip._internal.utils.temp_dir import TempDirectory, tempdir_kinds
+from pip._internal.utils.virtualenv import running_under_virtualenv
+from pip._internal.vcs import vcs
+
+logger = logging.getLogger(__name__)
+
+
+class InstallRequirement:
+    """
+    Represents something that may be installed later on, may have information
+    about where to fetch the relevant requirement and also contains logic for
+    installing the said requirement.
+    """
+
+    def __init__(
+        self,
+        req: Optional[Requirement],
+        comes_from: Optional[Union[str, "InstallRequirement"]],
+        editable: bool = False,
+        link: Optional[Link] = None,
+        markers: Optional[Marker] = None,
+        use_pep517: Optional[bool] = None,
+        isolated: bool = False,
+        install_options: Optional[List[str]] = None,
+        global_options: Optional[List[str]] = None,
+        hash_options: Optional[Dict[str, List[str]]] = None,
+        config_settings: Optional[Dict[str, str]] = None,
+        constraint: bool = False,
+        extras: Collection[str] = (),
+        user_supplied: bool = False,
+        permit_editable_wheels: bool = False,
+    ) -> None:
+        assert req is None or isinstance(req, Requirement), req
+        self.req = req
+        self.comes_from = comes_from
+        self.constraint = constraint
+        self.editable = editable
+        self.permit_editable_wheels = permit_editable_wheels
+        self.legacy_install_reason: Optional[LegacyInstallReason] = None
+
+        # source_dir is the local directory where the linked requirement is
+        # located, or unpacked. In case unpacking is needed, creating and
+        # populating source_dir is done by the RequirementPreparer. Note this
+        # is not necessarily the directory where pyproject.toml or setup.py is
+        # located - that one is obtained via unpacked_source_directory.
+        self.source_dir: Optional[str] = None
+        if self.editable:
+            assert link
+            if link.is_file:
+                self.source_dir = os.path.normpath(os.path.abspath(link.file_path))
+
+        if link is None and req and req.url:
+            # PEP 508 URL requirement
+            link = Link(req.url)
+        self.link = self.original_link = link
+        self.original_link_is_in_wheel_cache = False
+
+        # Information about the location of the artifact that was downloaded . This
+        # property is guaranteed to be set in resolver results.
+        self.download_info: Optional[DirectUrl] = None
+
+        # Path to any downloaded or already-existing package.
+        self.local_file_path: Optional[str] = None
+        if self.link and self.link.is_file:
+            self.local_file_path = self.link.file_path
+
+        if extras:
+            self.extras = extras
+        elif req:
+            self.extras = {safe_extra(extra) for extra in req.extras}
+        else:
+            self.extras = set()
+        if markers is None and req:
+            markers = req.marker
+        self.markers = markers
+
+        # This holds the Distribution object if this requirement is already installed.
+        self.satisfied_by: Optional[BaseDistribution] = None
+        # Whether the installation process should try to uninstall an existing
+        # distribution before installing this requirement.
+        self.should_reinstall = False
+        # Temporary build location
+        self._temp_build_dir: Optional[TempDirectory] = None
+        # Set to True after successful installation
+        self.install_succeeded: Optional[bool] = None
+        # Supplied options
+        self.install_options = install_options if install_options else []
+        self.global_options = global_options if global_options else []
+        self.hash_options = hash_options if hash_options else {}
+        self.config_settings = config_settings
+        # Set to True after successful preparation of this requirement
+        self.prepared = False
+        # User supplied requirement are explicitly requested for installation
+        # by the user via CLI arguments or requirements files, as opposed to,
+        # e.g. dependencies, extras or constraints.
+        self.user_supplied = user_supplied
+
+        self.isolated = isolated
+        self.build_env: BuildEnvironment = NoOpBuildEnvironment()
+
+        # For PEP 517, the directory where we request the project metadata
+        # gets stored. We need this to pass to build_wheel, so the backend
+        # can ensure that the wheel matches the metadata (see the PEP for
+        # details).
+        self.metadata_directory: Optional[str] = None
+
+        # The static build requirements (from pyproject.toml)
+        self.pyproject_requires: Optional[List[str]] = None
+
+        # Build requirements that we will check are available
+        self.requirements_to_check: List[str] = []
+
+        # The PEP 517 backend we should use to build the project
+        self.pep517_backend: Optional[Pep517HookCaller] = None
+
+        # Are we using PEP 517 for this requirement?
+        # After pyproject.toml has been loaded, the only valid values are True
+        # and False. Before loading, None is valid (meaning "use the default").
+        # Setting an explicit value before loading pyproject.toml is supported,
+        # but after loading this flag should be treated as read only.
+        self.use_pep517 = use_pep517
+
+        # This requirement needs more preparation before it can be built
+        self.needs_more_preparation = False
+
+    def __str__(self) -> str:
+        if self.req:
+            s = str(self.req)
+            if self.link:
+                s += " from {}".format(redact_auth_from_url(self.link.url))
+        elif self.link:
+            s = redact_auth_from_url(self.link.url)
+        else:
+            s = "<InstallRequirement>"
+        if self.satisfied_by is not None:
+            s += " in {}".format(display_path(self.satisfied_by.location))
+        if self.comes_from:
+            if isinstance(self.comes_from, str):
+                comes_from: Optional[str] = self.comes_from
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += f" (from {comes_from})"
+        return s
+
+    def __repr__(self) -> str:
+        return "<{} object: {} editable={!r}>".format(
+            self.__class__.__name__, str(self), self.editable
+        )
+
+    def format_debug(self) -> str:
+        """An un-tested helper for getting state, for debugging."""
+        attributes = vars(self)
+        names = sorted(attributes)
+
+        state = ("{}={!r}".format(attr, attributes[attr]) for attr in sorted(names))
+        return "<{name} object: {{{state}}}>".format(
+            name=self.__class__.__name__,
+            state=", ".join(state),
+        )
+
+    # Things that are valid for all kinds of requirements?
+    @property
+    def name(self) -> Optional[str]:
+        if self.req is None:
+            return None
+        return self.req.name
+
+    @functools.lru_cache()  # use cached_property in python 3.8+
+    def supports_pyproject_editable(self) -> bool:
+        if not self.use_pep517:
+            return False
+        assert self.pep517_backend
+        with self.build_env:
+            runner = runner_with_spinner_message(
+                "Checking if build backend supports build_editable"
+            )
+            with self.pep517_backend.subprocess_runner(runner):
+                return "build_editable" in self.pep517_backend._supported_features()
+
+    @property
+    def specifier(self) -> SpecifierSet:
+        return self.req.specifier
+
+    @property
+    def is_pinned(self) -> bool:
+        """Return whether I am pinned to an exact version.
+
+        For example, some-package==1.2 is pinned; some-package>1.2 is not.
+        """
+        specifiers = self.specifier
+        return len(specifiers) == 1 and next(iter(specifiers)).operator in {"==", "==="}
+
+    def match_markers(self, extras_requested: Optional[Iterable[str]] = None) -> bool:
+        if not extras_requested:
+            # Provide an extra to safely evaluate the markers
+            # without matching any extra
+            extras_requested = ("",)
+        if self.markers is not None:
+            return any(
+                self.markers.evaluate({"extra": extra}) for extra in extras_requested
+            )
+        else:
+            return True
+
+    @property
+    def has_hash_options(self) -> bool:
+        """Return whether any known-good hashes are specified as options.
+
+        These activate --require-hashes mode; hashes specified as part of a
+        URL do not.
+
+        """
+        return bool(self.hash_options)
+
+    def hashes(self, trust_internet: bool = True) -> Hashes:
+        """Return a hash-comparer that considers my option- and URL-based
+        hashes to be known-good.
+
+        Hashes in URLs--ones embedded in the requirements file, not ones
+        downloaded from an index server--are almost peers with ones from
+        flags. They satisfy --require-hashes (whether it was implicitly or
+        explicitly activated) but do not activate it. md5 and sha224 are not
+        allowed in flags, which should nudge people toward good algos. We
+        always OR all hashes together, even ones from URLs.
+
+        :param trust_internet: Whether to trust URL-based (#md5=...) hashes
+            downloaded from the internet, as by populate_link()
+
+        """
+        good_hashes = self.hash_options.copy()
+        link = self.link if trust_internet else self.original_link
+        if link and link.hash:
+            good_hashes.setdefault(link.hash_name, []).append(link.hash)
+        return Hashes(good_hashes)
+
+    def from_path(self) -> Optional[str]:
+        """Format a nice indicator to show where this "comes from" """
+        if self.req is None:
+            return None
+        s = str(self.req)
+        if self.comes_from:
+            if isinstance(self.comes_from, str):
+                comes_from = self.comes_from
+            else:
+                comes_from = self.comes_from.from_path()
+            if comes_from:
+                s += "->" + comes_from
+        return s
+
+    def ensure_build_location(
+        self, build_dir: str, autodelete: bool, parallel_builds: bool
+    ) -> str:
+        assert build_dir is not None
+        if self._temp_build_dir is not None:
+            assert self._temp_build_dir.path
+            return self._temp_build_dir.path
+        if self.req is None:
+            # Some systems have /tmp as a symlink which confuses custom
+            # builds (such as numpy). Thus, we ensure that the real path
+            # is returned.
+            self._temp_build_dir = TempDirectory(
+                kind=tempdir_kinds.REQ_BUILD, globally_managed=True
+            )
+
+            return self._temp_build_dir.path
+
+        # This is the only remaining place where we manually determine the path
+        # for the temporary directory. It is only needed for editables where
+        # it is the value of the --src option.
+
+        # When parallel builds are enabled, add a UUID to the build directory
+        # name so multiple builds do not interfere with each other.
+        dir_name: str = canonicalize_name(self.name)
+        if parallel_builds:
+            dir_name = f"{dir_name}_{uuid.uuid4().hex}"
+
+        # FIXME: Is there a better place to create the build_dir? (hg and bzr
+        # need this)
+        if not os.path.exists(build_dir):
+            logger.debug("Creating directory %s", build_dir)
+            os.makedirs(build_dir)
+        actual_build_dir = os.path.join(build_dir, dir_name)
+        # `None` indicates that we respect the globally-configured deletion
+        # settings, which is what we actually want when auto-deleting.
+        delete_arg = None if autodelete else False
+        return TempDirectory(
+            path=actual_build_dir,
+            delete=delete_arg,
+            kind=tempdir_kinds.REQ_BUILD,
+            globally_managed=True,
+        ).path
+
+    def _set_requirement(self) -> None:
+        """Set requirement after generating metadata."""
+        assert self.req is None
+        assert self.metadata is not None
+        assert self.source_dir is not None
+
+        # Construct a Requirement object from the generated metadata
+        if isinstance(parse_version(self.metadata["Version"]), Version):
+            op = "=="
+        else:
+            op = "==="
+
+        self.req = Requirement(
+            "".join(
+                [
+                    self.metadata["Name"],
+                    op,
+                    self.metadata["Version"],
+                ]
+            )
+        )
+
+    def warn_on_mismatching_name(self) -> None:
+        metadata_name = canonicalize_name(self.metadata["Name"])
+        if canonicalize_name(self.req.name) == metadata_name:
+            # Everything is fine.
+            return
+
+        # If we're here, there's a mismatch. Log a warning about it.
+        logger.warning(
+            "Generating metadata for package %s "
+            "produced metadata for project name %s. Fix your "
+            "#egg=%s fragments.",
+            self.name,
+            metadata_name,
+            self.name,
+        )
+        self.req = Requirement(metadata_name)
+
+    def check_if_exists(self, use_user_site: bool) -> None:
+        """Find an installed distribution that satisfies or conflicts
+        with this requirement, and set self.satisfied_by or
+        self.should_reinstall appropriately.
+        """
+        if self.req is None:
+            return
+        existing_dist = get_default_environment().get_distribution(self.req.name)
+        if not existing_dist:
+            return
+
+        version_compatible = self.req.specifier.contains(
+            existing_dist.version,
+            prereleases=True,
+        )
+        if not version_compatible:
+            self.satisfied_by = None
+            if use_user_site:
+                if existing_dist.in_usersite:
+                    self.should_reinstall = True
+                elif running_under_virtualenv() and existing_dist.in_site_packages:
+                    raise InstallationError(
+                        f"Will not install to the user site because it will "
+                        f"lack sys.path precedence to {existing_dist.raw_name} "
+                        f"in {existing_dist.location}"
+                    )
+            else:
+                self.should_reinstall = True
+        else:
+            if self.editable:
+                self.should_reinstall = True
+                # when installing editables, nothing pre-existing should ever
+                # satisfy
+                self.satisfied_by = None
+            else:
+                self.satisfied_by = existing_dist
+
+    # Things valid for wheels
+    @property
+    def is_wheel(self) -> bool:
+        if not self.link:
+            return False
+        return self.link.is_wheel
+
+    # Things valid for sdists
+    @property
+    def unpacked_source_directory(self) -> str:
+        return os.path.join(
+            self.source_dir, self.link and self.link.subdirectory_fragment or ""
+        )
+
+    @property
+    def setup_py_path(self) -> str:
+        assert self.source_dir, f"No source dir for {self}"
+        setup_py = os.path.join(self.unpacked_source_directory, "setup.py")
+
+        return setup_py
+
+    @property
+    def setup_cfg_path(self) -> str:
+        assert self.source_dir, f"No source dir for {self}"
+        setup_cfg = os.path.join(self.unpacked_source_directory, "setup.cfg")
+
+        return setup_cfg
+
+    @property
+    def pyproject_toml_path(self) -> str:
+        assert self.source_dir, f"No source dir for {self}"
+        return make_pyproject_path(self.unpacked_source_directory)
+
+    def load_pyproject_toml(self) -> None:
+        """Load the pyproject.toml file.
+
+        After calling this routine, all of the attributes related to PEP 517
+        processing for this requirement have been set. In particular, the
+        use_pep517 attribute can be used to determine whether we should
+        follow the PEP 517 or legacy (setup.py) code path.
+        """
+        pyproject_toml_data = load_pyproject_toml(
+            self.use_pep517, self.pyproject_toml_path, self.setup_py_path, str(self)
+        )
+
+        if pyproject_toml_data is None:
+            self.use_pep517 = False
+            return
+
+        self.use_pep517 = True
+        requires, backend, check, backend_path = pyproject_toml_data
+        self.requirements_to_check = check
+        self.pyproject_requires = requires
+        self.pep517_backend = ConfiguredPep517HookCaller(
+            self,
+            self.unpacked_source_directory,
+            backend,
+            backend_path=backend_path,
+        )
+
+    def isolated_editable_sanity_check(self) -> None:
+        """Check that an editable requirement if valid for use with PEP 517/518.
+
+        This verifies that an editable that has a pyproject.toml either supports PEP 660
+        or as a setup.py or a setup.cfg
+        """
+        if (
+            self.editable
+            and self.use_pep517
+            and not self.supports_pyproject_editable()
+            and not os.path.isfile(self.setup_py_path)
+            and not os.path.isfile(self.setup_cfg_path)
+        ):
+            raise InstallationError(
+                f"Project {self} has a 'pyproject.toml' and its build "
+                f"backend is missing the 'build_editable' hook. Since it does not "
+                f"have a 'setup.py' nor a 'setup.cfg', "
+                f"it cannot be installed in editable mode. "
+                f"Consider using a build backend that supports PEP 660."
+            )
+
+    def prepare_metadata(self) -> None:
+        """Ensure that project metadata is available.
+
+        Under PEP 517 and PEP 660, call the backend hook to prepare the metadata.
+        Under legacy processing, call setup.py egg-info.
+        """
+        assert self.source_dir
+        details = self.name or f"from {self.link}"
+
+        if self.use_pep517:
+            assert self.pep517_backend is not None
+            if (
+                self.editable
+                and self.permit_editable_wheels
+                and self.supports_pyproject_editable()
+            ):
+                self.metadata_directory = generate_editable_metadata(
+                    build_env=self.build_env,
+                    backend=self.pep517_backend,
+                    details=details,
+                )
+            else:
+                self.metadata_directory = generate_metadata(
+                    build_env=self.build_env,
+                    backend=self.pep517_backend,
+                    details=details,
+                )
+        else:
+            self.metadata_directory = generate_metadata_legacy(
+                build_env=self.build_env,
+                setup_py_path=self.setup_py_path,
+                source_dir=self.unpacked_source_directory,
+                isolated=self.isolated,
+                details=details,
+            )
+
+        # Act on the newly generated metadata, based on the name and version.
+        if not self.name:
+            self._set_requirement()
+        else:
+            self.warn_on_mismatching_name()
+
+        self.assert_source_matches_version()
+
+    @property
+    def metadata(self) -> Any:
+        if not hasattr(self, "_metadata"):
+            self._metadata = self.get_dist().metadata
+
+        return self._metadata
+
+    def get_dist(self) -> BaseDistribution:
+        if self.metadata_directory:
+            return get_directory_distribution(self.metadata_directory)
+        elif self.local_file_path and self.is_wheel:
+            return get_wheel_distribution(
+                FilesystemWheel(self.local_file_path), canonicalize_name(self.name)
+            )
+        raise AssertionError(
+            f"InstallRequirement {self} has no metadata directory and no wheel: "
+            f"can't make a distribution."
+        )
+
+    def assert_source_matches_version(self) -> None:
+        assert self.source_dir
+        version = self.metadata["version"]
+        if self.req.specifier and version not in self.req.specifier:
+            logger.warning(
+                "Requested %s, but installing version %s",
+                self,
+                version,
+            )
+        else:
+            logger.debug(
+                "Source in %s has version %s, which satisfies requirement %s",
+                display_path(self.source_dir),
+                version,
+                self,
+            )
+
+    # For both source distributions and editables
+    def ensure_has_source_dir(
+        self,
+        parent_dir: str,
+        autodelete: bool = False,
+        parallel_builds: bool = False,
+    ) -> None:
+        """Ensure that a source_dir is set.
+
+        This will create a temporary build dir if the name of the requirement
+        isn't known yet.
+
+        :param parent_dir: The ideal pip parent_dir for the source_dir.
+            Generally src_dir for editables and build_dir for sdists.
+        :return: self.source_dir
+        """
+        if self.source_dir is None:
+            self.source_dir = self.ensure_build_location(
+                parent_dir,
+                autodelete=autodelete,
+                parallel_builds=parallel_builds,
+            )
+
+    # For editable installations
+    def update_editable(self) -> None:
+        if not self.link:
+            logger.debug(
+                "Cannot update repository at %s; repository location is unknown",
+                self.source_dir,
+            )
+            return
+        assert self.editable
+        assert self.source_dir
+        if self.link.scheme == "file":
+            # Static paths don't get updated
+            return
+        vcs_backend = vcs.get_backend_for_scheme(self.link.scheme)
+        # Editable requirements are validated in Requirement constructors.
+        # So here, if it's neither a path nor a valid VCS URL, it's a bug.
+        assert vcs_backend, f"Unsupported VCS URL {self.link.url}"
+        hidden_url = hide_url(self.link.url)
+        vcs_backend.obtain(self.source_dir, url=hidden_url, verbosity=0)
+
+    # Top-level Actions
+    def uninstall(
+        self, auto_confirm: bool = False, verbose: bool = False
+    ) -> Optional[UninstallPathSet]:
+        """
+        Uninstall the distribution currently satisfying this requirement.
+
+        Prompts before removing or modifying files unless
+        ``auto_confirm`` is True.
+
+        Refuses to delete or modify files outside of ``sys.prefix`` -
+        thus uninstallation within a virtual environment can only
+        modify that virtual environment, even if the virtualenv is
+        linked to global site-packages.
+
+        """
+        assert self.req
+        dist = get_default_environment().get_distribution(self.req.name)
+        if not dist:
+            logger.warning("Skipping %s as it is not installed.", self.name)
+            return None
+        logger.info("Found existing installation: %s", dist)
+
+        uninstalled_pathset = UninstallPathSet.from_dist(dist)
+        uninstalled_pathset.remove(auto_confirm, verbose)
+        return uninstalled_pathset
+
+    def _get_archive_name(self, path: str, parentdir: str, rootdir: str) -> str:
+        def _clean_zip_name(name: str, prefix: str) -> str:
+            assert name.startswith(
+                prefix + os.path.sep
+            ), f"name {name!r} doesn't start with prefix {prefix!r}"
+            name = name[len(prefix) + 1 :]
+            name = name.replace(os.path.sep, "/")
+            return name
+
+        path = os.path.join(parentdir, path)
+        name = _clean_zip_name(path, rootdir)
+        return self.name + "/" + name
+
+    def archive(self, build_dir: Optional[str]) -> None:
+        """Saves archive to provided build_dir.
+
+        Used for saving downloaded VCS requirements as part of `pip download`.
+        """
+        assert self.source_dir
+        if build_dir is None:
+            return
+
+        create_archive = True
+        archive_name = "{}-{}.zip".format(self.name, self.metadata["version"])
+        archive_path = os.path.join(build_dir, archive_name)
+
+        if os.path.exists(archive_path):
+            response = ask_path_exists(
+                "The file {} exists. (i)gnore, (w)ipe, "
+                "(b)ackup, (a)bort ".format(display_path(archive_path)),
+                ("i", "w", "b", "a"),
+            )
+            if response == "i":
+                create_archive = False
+            elif response == "w":
+                logger.warning("Deleting %s", display_path(archive_path))
+                os.remove(archive_path)
+            elif response == "b":
+                dest_file = backup_dir(archive_path)
+                logger.warning(
+                    "Backing up %s to %s",
+                    display_path(archive_path),
+                    display_path(dest_file),
+                )
+                shutil.move(archive_path, dest_file)
+            elif response == "a":
+                sys.exit(-1)
+
+        if not create_archive:
+            return
+
+        zip_output = zipfile.ZipFile(
+            archive_path,
+            "w",
+            zipfile.ZIP_DEFLATED,
+            allowZip64=True,
+        )
+        with zip_output:
+            dir = os.path.normcase(os.path.abspath(self.unpacked_source_directory))
+            for dirpath, dirnames, filenames in os.walk(dir):
+                for dirname in dirnames:
+                    dir_arcname = self._get_archive_name(
+                        dirname,
+                        parentdir=dirpath,
+                        rootdir=dir,
+                    )
+                    zipdir = zipfile.ZipInfo(dir_arcname + "/")
+                    zipdir.external_attr = 0x1ED << 16  # 0o755
+                    zip_output.writestr(zipdir, "")
+                for filename in filenames:
+                    file_arcname = self._get_archive_name(
+                        filename,
+                        parentdir=dirpath,
+                        rootdir=dir,
+                    )
+                    filename = os.path.join(dirpath, filename)
+                    zip_output.write(filename, file_arcname)
+
+        logger.info("Saved %s", display_path(archive_path))
+
+    def install(
+        self,
+        install_options: List[str],
+        global_options: Optional[Sequence[str]] = None,
+        root: Optional[str] = None,
+        home: Optional[str] = None,
+        prefix: Optional[str] = None,
+        warn_script_location: bool = True,
+        use_user_site: bool = False,
+        pycompile: bool = True,
+    ) -> None:
+        scheme = get_scheme(
+            self.name,
+            user=use_user_site,
+            home=home,
+            root=root,
+            isolated=self.isolated,
+            prefix=prefix,
+        )
+
+        global_options = global_options if global_options is not None else []
+        if self.editable and not self.is_wheel:
+            install_editable_legacy(
+                install_options,
+                global_options,
+                prefix=prefix,
+                home=home,
+                use_user_site=use_user_site,
+                name=self.name,
+                setup_py_path=self.setup_py_path,
+                isolated=self.isolated,
+                build_env=self.build_env,
+                unpacked_source_directory=self.unpacked_source_directory,
+            )
+            self.install_succeeded = True
+            return
+
+        if self.is_wheel:
+            assert self.local_file_path
+            direct_url = None
+            # TODO this can be refactored to direct_url = self.download_info
+            if self.editable:
+                direct_url = direct_url_for_editable(self.unpacked_source_directory)
+            elif self.original_link:
+                direct_url = direct_url_from_link(
+                    self.original_link,
+                    self.source_dir,
+                    self.original_link_is_in_wheel_cache,
+                )
+            install_wheel(
+                self.name,
+                self.local_file_path,
+                scheme=scheme,
+                req_description=str(self.req),
+                pycompile=pycompile,
+                warn_script_location=warn_script_location,
+                direct_url=direct_url,
+                requested=self.user_supplied,
+            )
+            self.install_succeeded = True
+            return
+
+        # TODO: Why don't we do this for editable installs?
+
+        # Extend the list of global and install options passed on to
+        # the setup.py call with the ones from the requirements file.
+        # Options specified in requirements file override those
+        # specified on the command line, since the last option given
+        # to setup.py is the one that is used.
+        global_options = list(global_options) + self.global_options
+        install_options = list(install_options) + self.install_options
+
+        try:
+            if (
+                self.legacy_install_reason is not None
+                and self.legacy_install_reason.emit_before_install
+            ):
+                self.legacy_install_reason.emit_deprecation(self.name)
+            success = install_legacy(
+                install_options=install_options,
+                global_options=global_options,
+                root=root,
+                home=home,
+                prefix=prefix,
+                use_user_site=use_user_site,
+                pycompile=pycompile,
+                scheme=scheme,
+                setup_py_path=self.setup_py_path,
+                isolated=self.isolated,
+                req_name=self.name,
+                build_env=self.build_env,
+                unpacked_source_directory=self.unpacked_source_directory,
+                req_description=str(self.req),
+            )
+        except LegacyInstallFailure as exc:
+            self.install_succeeded = False
+            raise exc
+        except Exception:
+            self.install_succeeded = True
+            raise
+
+        self.install_succeeded = success
+
+        if (
+            success
+            and self.legacy_install_reason is not None
+            and self.legacy_install_reason.emit_after_success
+        ):
+            self.legacy_install_reason.emit_deprecation(self.name)
+
+
+def check_invalid_constraint_type(req: InstallRequirement) -> str:
+
+    # Check for unsupported forms
+    problem = ""
+    if not req.name:
+        problem = "Unnamed requirements are not allowed as constraints"
+    elif req.editable:
+        problem = "Editable requirements are not allowed as constraints"
+    elif req.extras:
+        problem = "Constraints cannot have extras"
+
+    if problem:
+        deprecated(
+            reason=(
+                "Constraints are only allowed to take the form of a package "
+                "name and a version specifier. Other forms were originally "
+                "permitted as an accident of the implementation, but were "
+                "undocumented. The new implementation of the resolver no "
+                "longer supports these forms."
+            ),
+            replacement="replacing the constraint with a requirement",
+            # No plan yet for when the new resolver becomes default
+            gone_in=None,
+            issue=8210,
+        )
+
+    return problem
+
+
+def _has_option(options: Values, reqs: List[InstallRequirement], option: str) -> bool:
+    if getattr(options, option, None):
+        return True
+    for req in reqs:
+        if getattr(req, option, None):
+            return True
+    return False
+
+
+def _install_option_ignored(
+    install_options: List[str], reqs: List[InstallRequirement]
+) -> bool:
+    for req in reqs:
+        if (install_options or req.install_options) and not req.use_pep517:
+            return False
+    return True
+
+
+class LegacySetupPyOptionsCheckMode(Enum):
+    INSTALL = 1
+    WHEEL = 2
+    DOWNLOAD = 3
+
+
+def check_legacy_setup_py_options(
+    options: Values,
+    reqs: List[InstallRequirement],
+    mode: LegacySetupPyOptionsCheckMode,
+) -> None:
+    has_install_options = _has_option(options, reqs, "install_options")
+    has_build_options = _has_option(options, reqs, "build_options")
+    has_global_options = _has_option(options, reqs, "global_options")
+    legacy_setup_py_options_present = (
+        has_install_options or has_build_options or has_global_options
+    )
+    if not legacy_setup_py_options_present:
+        return
+
+    options.format_control.disallow_binaries()
+    logger.warning(
+        "Implying --no-binary=:all: due to the presence of "
+        "--build-option / --global-option / --install-option. "
+        "Consider using --config-settings for more flexibility.",
+    )
+    if mode == LegacySetupPyOptionsCheckMode.INSTALL and has_install_options:
+        if _install_option_ignored(options.install_options, reqs):
+            logger.warning(
+                "Ignoring --install-option when building using PEP 517",
+            )
+        else:
+            deprecated(
+                reason=(
+                    "--install-option is deprecated because "
+                    "it forces pip to use the 'setup.py install' "
+                    "command which is itself deprecated."
+                ),
+                issue=11358,
+                replacement="to use --config-settings",
+                gone_in="23.1",
+            )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/req_set.py b/venv/lib/python3.9/site-packages/pip/_internal/req/req_set.py
new file mode 100644
index 0000000..ec7a6e0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/req_set.py
@@ -0,0 +1,82 @@
+import logging
+from collections import OrderedDict
+from typing import Dict, List
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.req.req_install import InstallRequirement
+
+logger = logging.getLogger(__name__)
+
+
+class RequirementSet:
+    def __init__(self, check_supported_wheels: bool = True) -> None:
+        """Create a RequirementSet."""
+
+        self.requirements: Dict[str, InstallRequirement] = OrderedDict()
+        self.check_supported_wheels = check_supported_wheels
+
+        self.unnamed_requirements: List[InstallRequirement] = []
+
+    def __str__(self) -> str:
+        requirements = sorted(
+            (req for req in self.requirements.values() if not req.comes_from),
+            key=lambda req: canonicalize_name(req.name or ""),
+        )
+        return " ".join(str(req.req) for req in requirements)
+
+    def __repr__(self) -> str:
+        requirements = sorted(
+            self.requirements.values(),
+            key=lambda req: canonicalize_name(req.name or ""),
+        )
+
+        format_string = "<{classname} object; {count} requirement(s): {reqs}>"
+        return format_string.format(
+            classname=self.__class__.__name__,
+            count=len(requirements),
+            reqs=", ".join(str(req.req) for req in requirements),
+        )
+
+    def add_unnamed_requirement(self, install_req: InstallRequirement) -> None:
+        assert not install_req.name
+        self.unnamed_requirements.append(install_req)
+
+    def add_named_requirement(self, install_req: InstallRequirement) -> None:
+        assert install_req.name
+
+        project_name = canonicalize_name(install_req.name)
+        self.requirements[project_name] = install_req
+
+    def has_requirement(self, name: str) -> bool:
+        project_name = canonicalize_name(name)
+
+        return (
+            project_name in self.requirements
+            and not self.requirements[project_name].constraint
+        )
+
+    def get_requirement(self, name: str) -> InstallRequirement:
+        project_name = canonicalize_name(name)
+
+        if project_name in self.requirements:
+            return self.requirements[project_name]
+
+        raise KeyError(f"No project with the name {name!r}")
+
+    @property
+    def all_requirements(self) -> List[InstallRequirement]:
+        return self.unnamed_requirements + list(self.requirements.values())
+
+    @property
+    def requirements_to_install(self) -> List[InstallRequirement]:
+        """Return the list of requirements that need to be installed.
+
+        TODO remove this property together with the legacy resolver, since the new
+             resolver only returns requirements that need to be installed.
+        """
+        return [
+            install_req
+            for install_req in self.all_requirements
+            if not install_req.constraint and not install_req.satisfied_by
+        ]
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/req/req_uninstall.py b/venv/lib/python3.9/site-packages/pip/_internal/req/req_uninstall.py
new file mode 100644
index 0000000..15b6738
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/req/req_uninstall.py
@@ -0,0 +1,640 @@
+import functools
+import os
+import sys
+import sysconfig
+from importlib.util import cache_from_source
+from typing import Any, Callable, Dict, Generator, Iterable, List, Optional, Set, Tuple
+
+from pip._internal.exceptions import UninstallationError
+from pip._internal.locations import get_bin_prefix, get_bin_user
+from pip._internal.metadata import BaseDistribution
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.egg_link import egg_link_path_from_location
+from pip._internal.utils.logging import getLogger, indent_log
+from pip._internal.utils.misc import ask, is_local, normalize_path, renames, rmtree
+from pip._internal.utils.temp_dir import AdjacentTempDirectory, TempDirectory
+
+logger = getLogger(__name__)
+
+
+def _script_names(
+    bin_dir: str, script_name: str, is_gui: bool
+) -> Generator[str, None, None]:
+    """Create the fully qualified name of the files created by
+    {console,gui}_scripts for the given ``dist``.
+    Returns the list of file names
+    """
+    exe_name = os.path.join(bin_dir, script_name)
+    yield exe_name
+    if not WINDOWS:
+        return
+    yield f"{exe_name}.exe"
+    yield f"{exe_name}.exe.manifest"
+    if is_gui:
+        yield f"{exe_name}-script.pyw"
+    else:
+        yield f"{exe_name}-script.py"
+
+
+def _unique(
+    fn: Callable[..., Generator[Any, None, None]]
+) -> Callable[..., Generator[Any, None, None]]:
+    @functools.wraps(fn)
+    def unique(*args: Any, **kw: Any) -> Generator[Any, None, None]:
+        seen: Set[Any] = set()
+        for item in fn(*args, **kw):
+            if item not in seen:
+                seen.add(item)
+                yield item
+
+    return unique
+
+
+@_unique
+def uninstallation_paths(dist: BaseDistribution) -> Generator[str, None, None]:
+    """
+    Yield all the uninstallation paths for dist based on RECORD-without-.py[co]
+
+    Yield paths to all the files in RECORD. For each .py file in RECORD, add
+    the .pyc and .pyo in the same directory.
+
+    UninstallPathSet.add() takes care of the __pycache__ .py[co].
+
+    If RECORD is not found, raises UninstallationError,
+    with possible information from the INSTALLER file.
+
+    https://packaging.python.org/specifications/recording-installed-packages/
+    """
+    location = dist.location
+    assert location is not None, "not installed"
+
+    entries = dist.iter_declared_entries()
+    if entries is None:
+        msg = "Cannot uninstall {dist}, RECORD file not found.".format(dist=dist)
+        installer = dist.installer
+        if not installer or installer == "pip":
+            dep = "{}=={}".format(dist.raw_name, dist.version)
+            msg += (
+                " You might be able to recover from this via: "
+                "'pip install --force-reinstall --no-deps {}'.".format(dep)
+            )
+        else:
+            msg += " Hint: The package was installed by {}.".format(installer)
+        raise UninstallationError(msg)
+
+    for entry in entries:
+        path = os.path.join(location, entry)
+        yield path
+        if path.endswith(".py"):
+            dn, fn = os.path.split(path)
+            base = fn[:-3]
+            path = os.path.join(dn, base + ".pyc")
+            yield path
+            path = os.path.join(dn, base + ".pyo")
+            yield path
+
+
+def compact(paths: Iterable[str]) -> Set[str]:
+    """Compact a path set to contain the minimal number of paths
+    necessary to contain all paths in the set. If /a/path/ and
+    /a/path/to/a/file.txt are both in the set, leave only the
+    shorter path."""
+
+    sep = os.path.sep
+    short_paths: Set[str] = set()
+    for path in sorted(paths, key=len):
+        should_skip = any(
+            path.startswith(shortpath.rstrip("*"))
+            and path[len(shortpath.rstrip("*").rstrip(sep))] == sep
+            for shortpath in short_paths
+        )
+        if not should_skip:
+            short_paths.add(path)
+    return short_paths
+
+
+def compress_for_rename(paths: Iterable[str]) -> Set[str]:
+    """Returns a set containing the paths that need to be renamed.
+
+    This set may include directories when the original sequence of paths
+    included every file on disk.
+    """
+    case_map = {os.path.normcase(p): p for p in paths}
+    remaining = set(case_map)
+    unchecked = sorted({os.path.split(p)[0] for p in case_map.values()}, key=len)
+    wildcards: Set[str] = set()
+
+    def norm_join(*a: str) -> str:
+        return os.path.normcase(os.path.join(*a))
+
+    for root in unchecked:
+        if any(os.path.normcase(root).startswith(w) for w in wildcards):
+            # This directory has already been handled.
+            continue
+
+        all_files: Set[str] = set()
+        all_subdirs: Set[str] = set()
+        for dirname, subdirs, files in os.walk(root):
+            all_subdirs.update(norm_join(root, dirname, d) for d in subdirs)
+            all_files.update(norm_join(root, dirname, f) for f in files)
+        # If all the files we found are in our remaining set of files to
+        # remove, then remove them from the latter set and add a wildcard
+        # for the directory.
+        if not (all_files - remaining):
+            remaining.difference_update(all_files)
+            wildcards.add(root + os.sep)
+
+    return set(map(case_map.__getitem__, remaining)) | wildcards
+
+
+def compress_for_output_listing(paths: Iterable[str]) -> Tuple[Set[str], Set[str]]:
+    """Returns a tuple of 2 sets of which paths to display to user
+
+    The first set contains paths that would be deleted. Files of a package
+    are not added and the top-level directory of the package has a '*' added
+    at the end - to signify that all it's contents are removed.
+
+    The second set contains files that would have been skipped in the above
+    folders.
+    """
+
+    will_remove = set(paths)
+    will_skip = set()
+
+    # Determine folders and files
+    folders = set()
+    files = set()
+    for path in will_remove:
+        if path.endswith(".pyc"):
+            continue
+        if path.endswith("__init__.py") or ".dist-info" in path:
+            folders.add(os.path.dirname(path))
+        files.add(path)
+
+    # probably this one https://github.com/python/mypy/issues/390
+    _normcased_files = set(map(os.path.normcase, files))  # type: ignore
+
+    folders = compact(folders)
+
+    # This walks the tree using os.walk to not miss extra folders
+    # that might get added.
+    for folder in folders:
+        for dirpath, _, dirfiles in os.walk(folder):
+            for fname in dirfiles:
+                if fname.endswith(".pyc"):
+                    continue
+
+                file_ = os.path.join(dirpath, fname)
+                if (
+                    os.path.isfile(file_)
+                    and os.path.normcase(file_) not in _normcased_files
+                ):
+                    # We are skipping this file. Add it to the set.
+                    will_skip.add(file_)
+
+    will_remove = files | {os.path.join(folder, "*") for folder in folders}
+
+    return will_remove, will_skip
+
+
+class StashedUninstallPathSet:
+    """A set of file rename operations to stash files while
+    tentatively uninstalling them."""
+
+    def __init__(self) -> None:
+        # Mapping from source file root to [Adjacent]TempDirectory
+        # for files under that directory.
+        self._save_dirs: Dict[str, TempDirectory] = {}
+        # (old path, new path) tuples for each move that may need
+        # to be undone.
+        self._moves: List[Tuple[str, str]] = []
+
+    def _get_directory_stash(self, path: str) -> str:
+        """Stashes a directory.
+
+        Directories are stashed adjacent to their original location if
+        possible, or else moved/copied into the user's temp dir."""
+
+        try:
+            save_dir: TempDirectory = AdjacentTempDirectory(path)
+        except OSError:
+            save_dir = TempDirectory(kind="uninstall")
+        self._save_dirs[os.path.normcase(path)] = save_dir
+
+        return save_dir.path
+
+    def _get_file_stash(self, path: str) -> str:
+        """Stashes a file.
+
+        If no root has been provided, one will be created for the directory
+        in the user's temp directory."""
+        path = os.path.normcase(path)
+        head, old_head = os.path.dirname(path), None
+        save_dir = None
+
+        while head != old_head:
+            try:
+                save_dir = self._save_dirs[head]
+                break
+            except KeyError:
+                pass
+            head, old_head = os.path.dirname(head), head
+        else:
+            # Did not find any suitable root
+            head = os.path.dirname(path)
+            save_dir = TempDirectory(kind="uninstall")
+            self._save_dirs[head] = save_dir
+
+        relpath = os.path.relpath(path, head)
+        if relpath and relpath != os.path.curdir:
+            return os.path.join(save_dir.path, relpath)
+        return save_dir.path
+
+    def stash(self, path: str) -> str:
+        """Stashes the directory or file and returns its new location.
+        Handle symlinks as files to avoid modifying the symlink targets.
+        """
+        path_is_dir = os.path.isdir(path) and not os.path.islink(path)
+        if path_is_dir:
+            new_path = self._get_directory_stash(path)
+        else:
+            new_path = self._get_file_stash(path)
+
+        self._moves.append((path, new_path))
+        if path_is_dir and os.path.isdir(new_path):
+            # If we're moving a directory, we need to
+            # remove the destination first or else it will be
+            # moved to inside the existing directory.
+            # We just created new_path ourselves, so it will
+            # be removable.
+            os.rmdir(new_path)
+        renames(path, new_path)
+        return new_path
+
+    def commit(self) -> None:
+        """Commits the uninstall by removing stashed files."""
+        for _, save_dir in self._save_dirs.items():
+            save_dir.cleanup()
+        self._moves = []
+        self._save_dirs = {}
+
+    def rollback(self) -> None:
+        """Undoes the uninstall by moving stashed files back."""
+        for p in self._moves:
+            logger.info("Moving to %s\n from %s", *p)
+
+        for new_path, path in self._moves:
+            try:
+                logger.debug("Replacing %s from %s", new_path, path)
+                if os.path.isfile(new_path) or os.path.islink(new_path):
+                    os.unlink(new_path)
+                elif os.path.isdir(new_path):
+                    rmtree(new_path)
+                renames(path, new_path)
+            except OSError as ex:
+                logger.error("Failed to restore %s", new_path)
+                logger.debug("Exception: %s", ex)
+
+        self.commit()
+
+    @property
+    def can_rollback(self) -> bool:
+        return bool(self._moves)
+
+
+class UninstallPathSet:
+    """A set of file paths to be removed in the uninstallation of a
+    requirement."""
+
+    def __init__(self, dist: BaseDistribution) -> None:
+        self._paths: Set[str] = set()
+        self._refuse: Set[str] = set()
+        self._pth: Dict[str, UninstallPthEntries] = {}
+        self._dist = dist
+        self._moved_paths = StashedUninstallPathSet()
+
+    def _permitted(self, path: str) -> bool:
+        """
+        Return True if the given path is one we are permitted to
+        remove/modify, False otherwise.
+
+        """
+        return is_local(path)
+
+    def add(self, path: str) -> None:
+        head, tail = os.path.split(path)
+
+        # we normalize the head to resolve parent directory symlinks, but not
+        # the tail, since we only want to uninstall symlinks, not their targets
+        path = os.path.join(normalize_path(head), os.path.normcase(tail))
+
+        if not os.path.exists(path):
+            return
+        if self._permitted(path):
+            self._paths.add(path)
+        else:
+            self._refuse.add(path)
+
+        # __pycache__ files can show up after 'installed-files.txt' is created,
+        # due to imports
+        if os.path.splitext(path)[1] == ".py":
+            self.add(cache_from_source(path))
+
+    def add_pth(self, pth_file: str, entry: str) -> None:
+        pth_file = normalize_path(pth_file)
+        if self._permitted(pth_file):
+            if pth_file not in self._pth:
+                self._pth[pth_file] = UninstallPthEntries(pth_file)
+            self._pth[pth_file].add(entry)
+        else:
+            self._refuse.add(pth_file)
+
+    def remove(self, auto_confirm: bool = False, verbose: bool = False) -> None:
+        """Remove paths in ``self._paths`` with confirmation (unless
+        ``auto_confirm`` is True)."""
+
+        if not self._paths:
+            logger.info(
+                "Can't uninstall '%s'. No files were found to uninstall.",
+                self._dist.raw_name,
+            )
+            return
+
+        dist_name_version = f"{self._dist.raw_name}-{self._dist.version}"
+        logger.info("Uninstalling %s:", dist_name_version)
+
+        with indent_log():
+            if auto_confirm or self._allowed_to_proceed(verbose):
+                moved = self._moved_paths
+
+                for_rename = compress_for_rename(self._paths)
+
+                for path in sorted(compact(for_rename)):
+                    moved.stash(path)
+                    logger.verbose("Removing file or directory %s", path)
+
+                for pth in self._pth.values():
+                    pth.remove()
+
+                logger.info("Successfully uninstalled %s", dist_name_version)
+
+    def _allowed_to_proceed(self, verbose: bool) -> bool:
+        """Display which files would be deleted and prompt for confirmation"""
+
+        def _display(msg: str, paths: Iterable[str]) -> None:
+            if not paths:
+                return
+
+            logger.info(msg)
+            with indent_log():
+                for path in sorted(compact(paths)):
+                    logger.info(path)
+
+        if not verbose:
+            will_remove, will_skip = compress_for_output_listing(self._paths)
+        else:
+            # In verbose mode, display all the files that are going to be
+            # deleted.
+            will_remove = set(self._paths)
+            will_skip = set()
+
+        _display("Would remove:", will_remove)
+        _display("Would not remove (might be manually added):", will_skip)
+        _display("Would not remove (outside of prefix):", self._refuse)
+        if verbose:
+            _display("Will actually move:", compress_for_rename(self._paths))
+
+        return ask("Proceed (Y/n)? ", ("y", "n", "")) != "n"
+
+    def rollback(self) -> None:
+        """Rollback the changes previously made by remove()."""
+        if not self._moved_paths.can_rollback:
+            logger.error(
+                "Can't roll back %s; was not uninstalled",
+                self._dist.raw_name,
+            )
+            return
+        logger.info("Rolling back uninstall of %s", self._dist.raw_name)
+        self._moved_paths.rollback()
+        for pth in self._pth.values():
+            pth.rollback()
+
+    def commit(self) -> None:
+        """Remove temporary save dir: rollback will no longer be possible."""
+        self._moved_paths.commit()
+
+    @classmethod
+    def from_dist(cls, dist: BaseDistribution) -> "UninstallPathSet":
+        dist_location = dist.location
+        info_location = dist.info_location
+        if dist_location is None:
+            logger.info(
+                "Not uninstalling %s since it is not installed",
+                dist.canonical_name,
+            )
+            return cls(dist)
+
+        normalized_dist_location = normalize_path(dist_location)
+        if not dist.local:
+            logger.info(
+                "Not uninstalling %s at %s, outside environment %s",
+                dist.canonical_name,
+                normalized_dist_location,
+                sys.prefix,
+            )
+            return cls(dist)
+
+        if normalized_dist_location in {
+            p
+            for p in {sysconfig.get_path("stdlib"), sysconfig.get_path("platstdlib")}
+            if p
+        }:
+            logger.info(
+                "Not uninstalling %s at %s, as it is in the standard library.",
+                dist.canonical_name,
+                normalized_dist_location,
+            )
+            return cls(dist)
+
+        paths_to_remove = cls(dist)
+        develop_egg_link = egg_link_path_from_location(dist.raw_name)
+
+        # Distribution is installed with metadata in a "flat" .egg-info
+        # directory. This means it is not a modern .dist-info installation, an
+        # egg, or legacy editable.
+        setuptools_flat_installation = (
+            dist.installed_with_setuptools_egg_info
+            and info_location is not None
+            and os.path.exists(info_location)
+            # If dist is editable and the location points to a ``.egg-info``,
+            # we are in fact in the legacy editable case.
+            and not info_location.endswith(f"{dist.setuptools_filename}.egg-info")
+        )
+
+        # Uninstall cases order do matter as in the case of 2 installs of the
+        # same package, pip needs to uninstall the currently detected version
+        if setuptools_flat_installation:
+            if info_location is not None:
+                paths_to_remove.add(info_location)
+            installed_files = dist.iter_declared_entries()
+            if installed_files is not None:
+                for installed_file in installed_files:
+                    paths_to_remove.add(os.path.join(dist_location, installed_file))
+            # FIXME: need a test for this elif block
+            # occurs with --single-version-externally-managed/--record outside
+            # of pip
+            elif dist.is_file("top_level.txt"):
+                try:
+                    namespace_packages = dist.read_text("namespace_packages.txt")
+                except FileNotFoundError:
+                    namespaces = []
+                else:
+                    namespaces = namespace_packages.splitlines(keepends=False)
+                for top_level_pkg in [
+                    p
+                    for p in dist.read_text("top_level.txt").splitlines()
+                    if p and p not in namespaces
+                ]:
+                    path = os.path.join(dist_location, top_level_pkg)
+                    paths_to_remove.add(path)
+                    paths_to_remove.add(f"{path}.py")
+                    paths_to_remove.add(f"{path}.pyc")
+                    paths_to_remove.add(f"{path}.pyo")
+
+        elif dist.installed_by_distutils:
+            raise UninstallationError(
+                "Cannot uninstall {!r}. It is a distutils installed project "
+                "and thus we cannot accurately determine which files belong "
+                "to it which would lead to only a partial uninstall.".format(
+                    dist.raw_name,
+                )
+            )
+
+        elif dist.installed_as_egg:
+            # package installed by easy_install
+            # We cannot match on dist.egg_name because it can slightly vary
+            # i.e. setuptools-0.6c11-py2.6.egg vs setuptools-0.6rc11-py2.6.egg
+            paths_to_remove.add(dist_location)
+            easy_install_egg = os.path.split(dist_location)[1]
+            easy_install_pth = os.path.join(
+                os.path.dirname(dist_location),
+                "easy-install.pth",
+            )
+            paths_to_remove.add_pth(easy_install_pth, "./" + easy_install_egg)
+
+        elif dist.installed_with_dist_info:
+            for path in uninstallation_paths(dist):
+                paths_to_remove.add(path)
+
+        elif develop_egg_link:
+            # PEP 660 modern editable is handled in the ``.dist-info`` case
+            # above, so this only covers the setuptools-style editable.
+            with open(develop_egg_link) as fh:
+                link_pointer = os.path.normcase(fh.readline().strip())
+                normalized_link_pointer = normalize_path(link_pointer)
+            assert os.path.samefile(
+                normalized_link_pointer, normalized_dist_location
+            ), (
+                f"Egg-link {link_pointer} does not match installed location of "
+                f"{dist.raw_name} (at {dist_location})"
+            )
+            paths_to_remove.add(develop_egg_link)
+            easy_install_pth = os.path.join(
+                os.path.dirname(develop_egg_link), "easy-install.pth"
+            )
+            paths_to_remove.add_pth(easy_install_pth, dist_location)
+
+        else:
+            logger.debug(
+                "Not sure how to uninstall: %s - Check: %s",
+                dist,
+                dist_location,
+            )
+
+        if dist.in_usersite:
+            bin_dir = get_bin_user()
+        else:
+            bin_dir = get_bin_prefix()
+
+        # find distutils scripts= scripts
+        try:
+            for script in dist.iter_distutils_script_names():
+                paths_to_remove.add(os.path.join(bin_dir, script))
+                if WINDOWS:
+                    paths_to_remove.add(os.path.join(bin_dir, f"{script}.bat"))
+        except (FileNotFoundError, NotADirectoryError):
+            pass
+
+        # find console_scripts and gui_scripts
+        def iter_scripts_to_remove(
+            dist: BaseDistribution,
+            bin_dir: str,
+        ) -> Generator[str, None, None]:
+            for entry_point in dist.iter_entry_points():
+                if entry_point.group == "console_scripts":
+                    yield from _script_names(bin_dir, entry_point.name, False)
+                elif entry_point.group == "gui_scripts":
+                    yield from _script_names(bin_dir, entry_point.name, True)
+
+        for s in iter_scripts_to_remove(dist, bin_dir):
+            paths_to_remove.add(s)
+
+        return paths_to_remove
+
+
+class UninstallPthEntries:
+    def __init__(self, pth_file: str) -> None:
+        self.file = pth_file
+        self.entries: Set[str] = set()
+        self._saved_lines: Optional[List[bytes]] = None
+
+    def add(self, entry: str) -> None:
+        entry = os.path.normcase(entry)
+        # On Windows, os.path.normcase converts the entry to use
+        # backslashes.  This is correct for entries that describe absolute
+        # paths outside of site-packages, but all the others use forward
+        # slashes.
+        # os.path.splitdrive is used instead of os.path.isabs because isabs
+        # treats non-absolute paths with drive letter markings like c:foo\bar
+        # as absolute paths. It also does not recognize UNC paths if they don't
+        # have more than "\\sever\share". Valid examples: "\\server\share\" or
+        # "\\server\share\folder".
+        if WINDOWS and not os.path.splitdrive(entry)[0]:
+            entry = entry.replace("\\", "/")
+        self.entries.add(entry)
+
+    def remove(self) -> None:
+        logger.verbose("Removing pth entries from %s:", self.file)
+
+        # If the file doesn't exist, log a warning and return
+        if not os.path.isfile(self.file):
+            logger.warning("Cannot remove entries from nonexistent file %s", self.file)
+            return
+        with open(self.file, "rb") as fh:
+            # windows uses '\r\n' with py3k, but uses '\n' with py2.x
+            lines = fh.readlines()
+            self._saved_lines = lines
+        if any(b"\r\n" in line for line in lines):
+            endline = "\r\n"
+        else:
+            endline = "\n"
+        # handle missing trailing newline
+        if lines and not lines[-1].endswith(endline.encode("utf-8")):
+            lines[-1] = lines[-1] + endline.encode("utf-8")
+        for entry in self.entries:
+            try:
+                logger.verbose("Removing entry: %s", entry)
+                lines.remove((entry + endline).encode("utf-8"))
+            except ValueError:
+                pass
+        with open(self.file, "wb") as fh:
+            fh.writelines(lines)
+
+    def rollback(self) -> bool:
+        if self._saved_lines is None:
+            logger.error("Cannot roll back changes to %s, none were made", self.file)
+            return False
+        logger.debug("Rolling %s back to previous state", self.file)
+        with open(self.file, "wb") as fh:
+            fh.writelines(self._saved_lines)
+        return True
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..836e2a2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/base.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/base.cpython-39.pyc
new file mode 100644
index 0000000..072bc26
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/__pycache__/base.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/base.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/base.py
new file mode 100644
index 0000000..42dade1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/base.py
@@ -0,0 +1,20 @@
+from typing import Callable, List, Optional
+
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.req.req_set import RequirementSet
+
+InstallRequirementProvider = Callable[
+    [str, Optional[InstallRequirement]], InstallRequirement
+]
+
+
+class BaseResolver:
+    def resolve(
+        self, root_reqs: List[InstallRequirement], check_supported_wheels: bool
+    ) -> RequirementSet:
+        raise NotImplementedError()
+
+    def get_installation_order(
+        self, req_set: RequirementSet
+    ) -> List[InstallRequirement]:
+        raise NotImplementedError()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..f7dfa5b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/resolver.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/resolver.cpython-39.pyc
new file mode 100644
index 0000000..4bf56ff
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/__pycache__/resolver.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/resolver.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/resolver.py
new file mode 100644
index 0000000..fb49d41
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/legacy/resolver.py
@@ -0,0 +1,600 @@
+"""Dependency Resolution
+
+The dependency resolution in pip is performed as follows:
+
+for top-level requirements:
+    a. only one spec allowed per project, regardless of conflicts or not.
+       otherwise a "double requirement" exception is raised
+    b. they override sub-dependency requirements.
+for sub-dependencies
+    a. "first found, wins" (where the order is breadth first)
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import logging
+import sys
+from collections import defaultdict
+from itertools import chain
+from typing import DefaultDict, Iterable, List, Optional, Set, Tuple
+
+from pip._vendor.packaging import specifiers
+from pip._vendor.packaging.requirements import Requirement
+
+from pip._internal.cache import WheelCache
+from pip._internal.exceptions import (
+    BestVersionAlreadyInstalled,
+    DistributionNotFound,
+    HashError,
+    HashErrors,
+    InstallationError,
+    NoneMetadataError,
+    UnsupportedPythonVersion,
+)
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    check_invalid_constraint_type,
+)
+from pip._internal.req.req_set import RequirementSet
+from pip._internal.resolution.base import BaseResolver, InstallRequirementProvider
+from pip._internal.utils import compatibility_tags
+from pip._internal.utils.compatibility_tags import get_supported
+from pip._internal.utils.direct_url_helpers import direct_url_from_link
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import normalize_version_info
+from pip._internal.utils.packaging import check_requires_python
+
+logger = logging.getLogger(__name__)
+
+DiscoveredDependencies = DefaultDict[str, List[InstallRequirement]]
+
+
+def _check_dist_requires_python(
+    dist: BaseDistribution,
+    version_info: Tuple[int, int, int],
+    ignore_requires_python: bool = False,
+) -> None:
+    """
+    Check whether the given Python version is compatible with a distribution's
+    "Requires-Python" value.
+
+    :param version_info: A 3-tuple of ints representing the Python
+        major-minor-micro version to check.
+    :param ignore_requires_python: Whether to ignore the "Requires-Python"
+        value if the given Python version isn't compatible.
+
+    :raises UnsupportedPythonVersion: When the given Python version isn't
+        compatible.
+    """
+    # This idiosyncratically converts the SpecifierSet to str and let
+    # check_requires_python then parse it again into SpecifierSet. But this
+    # is the legacy resolver so I'm just not going to bother refactoring.
+    try:
+        requires_python = str(dist.requires_python)
+    except FileNotFoundError as e:
+        raise NoneMetadataError(dist, str(e))
+    try:
+        is_compatible = check_requires_python(
+            requires_python,
+            version_info=version_info,
+        )
+    except specifiers.InvalidSpecifier as exc:
+        logger.warning(
+            "Package %r has an invalid Requires-Python: %s", dist.raw_name, exc
+        )
+        return
+
+    if is_compatible:
+        return
+
+    version = ".".join(map(str, version_info))
+    if ignore_requires_python:
+        logger.debug(
+            "Ignoring failed Requires-Python check for package %r: %s not in %r",
+            dist.raw_name,
+            version,
+            requires_python,
+        )
+        return
+
+    raise UnsupportedPythonVersion(
+        "Package {!r} requires a different Python: {} not in {!r}".format(
+            dist.raw_name, version, requires_python
+        )
+    )
+
+
+class Resolver(BaseResolver):
+    """Resolves which packages need to be installed/uninstalled to perform \
+    the requested operation without breaking the requirements of any package.
+    """
+
+    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
+
+    def __init__(
+        self,
+        preparer: RequirementPreparer,
+        finder: PackageFinder,
+        wheel_cache: Optional[WheelCache],
+        make_install_req: InstallRequirementProvider,
+        use_user_site: bool,
+        ignore_dependencies: bool,
+        ignore_installed: bool,
+        ignore_requires_python: bool,
+        force_reinstall: bool,
+        upgrade_strategy: str,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+    ) -> None:
+        super().__init__()
+        assert upgrade_strategy in self._allowed_strategies
+
+        if py_version_info is None:
+            py_version_info = sys.version_info[:3]
+        else:
+            py_version_info = normalize_version_info(py_version_info)
+
+        self._py_version_info = py_version_info
+
+        self.preparer = preparer
+        self.finder = finder
+        self.wheel_cache = wheel_cache
+
+        self.upgrade_strategy = upgrade_strategy
+        self.force_reinstall = force_reinstall
+        self.ignore_dependencies = ignore_dependencies
+        self.ignore_installed = ignore_installed
+        self.ignore_requires_python = ignore_requires_python
+        self.use_user_site = use_user_site
+        self._make_install_req = make_install_req
+
+        self._discovered_dependencies: DiscoveredDependencies = defaultdict(list)
+
+    def resolve(
+        self, root_reqs: List[InstallRequirement], check_supported_wheels: bool
+    ) -> RequirementSet:
+        """Resolve what operations need to be done
+
+        As a side-effect of this method, the packages (and their dependencies)
+        are downloaded, unpacked and prepared for installation. This
+        preparation is done by ``pip.operations.prepare``.
+
+        Once PyPI has static dependency metadata available, it would be
+        possible to move the preparation to become a step separated from
+        dependency resolution.
+        """
+        requirement_set = RequirementSet(check_supported_wheels=check_supported_wheels)
+        for req in root_reqs:
+            if req.constraint:
+                check_invalid_constraint_type(req)
+            self._add_requirement_to_set(requirement_set, req)
+
+        # Actually prepare the files, and collect any exceptions. Most hash
+        # exceptions cannot be checked ahead of time, because
+        # _populate_link() needs to be called before we can make decisions
+        # based on link type.
+        discovered_reqs: List[InstallRequirement] = []
+        hash_errors = HashErrors()
+        for req in chain(requirement_set.all_requirements, discovered_reqs):
+            try:
+                discovered_reqs.extend(self._resolve_one(requirement_set, req))
+            except HashError as exc:
+                exc.req = req
+                hash_errors.append(exc)
+
+        if hash_errors:
+            raise hash_errors
+
+        return requirement_set
+
+    def _add_requirement_to_set(
+        self,
+        requirement_set: RequirementSet,
+        install_req: InstallRequirement,
+        parent_req_name: Optional[str] = None,
+        extras_requested: Optional[Iterable[str]] = None,
+    ) -> Tuple[List[InstallRequirement], Optional[InstallRequirement]]:
+        """Add install_req as a requirement to install.
+
+        :param parent_req_name: The name of the requirement that needed this
+            added. The name is used because when multiple unnamed requirements
+            resolve to the same name, we could otherwise end up with dependency
+            links that point outside the Requirements set. parent_req must
+            already be added. Note that None implies that this is a user
+            supplied requirement, vs an inferred one.
+        :param extras_requested: an iterable of extras used to evaluate the
+            environment markers.
+        :return: Additional requirements to scan. That is either [] if
+            the requirement is not applicable, or [install_req] if the
+            requirement is applicable and has just been added.
+        """
+        # If the markers do not match, ignore this requirement.
+        if not install_req.match_markers(extras_requested):
+            logger.info(
+                "Ignoring %s: markers '%s' don't match your environment",
+                install_req.name,
+                install_req.markers,
+            )
+            return [], None
+
+        # If the wheel is not supported, raise an error.
+        # Should check this after filtering out based on environment markers to
+        # allow specifying different wheels based on the environment/OS, in a
+        # single requirements file.
+        if install_req.link and install_req.link.is_wheel:
+            wheel = Wheel(install_req.link.filename)
+            tags = compatibility_tags.get_supported()
+            if requirement_set.check_supported_wheels and not wheel.supported(tags):
+                raise InstallationError(
+                    "{} is not a supported wheel on this platform.".format(
+                        wheel.filename
+                    )
+                )
+
+        # This next bit is really a sanity check.
+        assert (
+            not install_req.user_supplied or parent_req_name is None
+        ), "a user supplied req shouldn't have a parent"
+
+        # Unnamed requirements are scanned again and the requirement won't be
+        # added as a dependency until after scanning.
+        if not install_req.name:
+            requirement_set.add_unnamed_requirement(install_req)
+            return [install_req], None
+
+        try:
+            existing_req: Optional[
+                InstallRequirement
+            ] = requirement_set.get_requirement(install_req.name)
+        except KeyError:
+            existing_req = None
+
+        has_conflicting_requirement = (
+            parent_req_name is None
+            and existing_req
+            and not existing_req.constraint
+            and existing_req.extras == install_req.extras
+            and existing_req.req
+            and install_req.req
+            and existing_req.req.specifier != install_req.req.specifier
+        )
+        if has_conflicting_requirement:
+            raise InstallationError(
+                "Double requirement given: {} (already in {}, name={!r})".format(
+                    install_req, existing_req, install_req.name
+                )
+            )
+
+        # When no existing requirement exists, add the requirement as a
+        # dependency and it will be scanned again after.
+        if not existing_req:
+            requirement_set.add_named_requirement(install_req)
+            # We'd want to rescan this requirement later
+            return [install_req], install_req
+
+        # Assume there's no need to scan, and that we've already
+        # encountered this for scanning.
+        if install_req.constraint or not existing_req.constraint:
+            return [], existing_req
+
+        does_not_satisfy_constraint = install_req.link and not (
+            existing_req.link and install_req.link.path == existing_req.link.path
+        )
+        if does_not_satisfy_constraint:
+            raise InstallationError(
+                "Could not satisfy constraints for '{}': "
+                "installation from path or url cannot be "
+                "constrained to a version".format(install_req.name)
+            )
+        # If we're now installing a constraint, mark the existing
+        # object for real installation.
+        existing_req.constraint = False
+        # If we're now installing a user supplied requirement,
+        # mark the existing object as such.
+        if install_req.user_supplied:
+            existing_req.user_supplied = True
+        existing_req.extras = tuple(
+            sorted(set(existing_req.extras) | set(install_req.extras))
+        )
+        logger.debug(
+            "Setting %s extras to: %s",
+            existing_req,
+            existing_req.extras,
+        )
+        # Return the existing requirement for addition to the parent and
+        # scanning again.
+        return [existing_req], existing_req
+
+    def _is_upgrade_allowed(self, req: InstallRequirement) -> bool:
+        if self.upgrade_strategy == "to-satisfy-only":
+            return False
+        elif self.upgrade_strategy == "eager":
+            return True
+        else:
+            assert self.upgrade_strategy == "only-if-needed"
+            return req.user_supplied or req.constraint
+
+    def _set_req_to_reinstall(self, req: InstallRequirement) -> None:
+        """
+        Set a requirement to be installed.
+        """
+        # Don't uninstall the conflict if doing a user install and the
+        # conflict is not a user install.
+        if not self.use_user_site or req.satisfied_by.in_usersite:
+            req.should_reinstall = True
+        req.satisfied_by = None
+
+    def _check_skip_installed(
+        self, req_to_install: InstallRequirement
+    ) -> Optional[str]:
+        """Check if req_to_install should be skipped.
+
+        This will check if the req is installed, and whether we should upgrade
+        or reinstall it, taking into account all the relevant user options.
+
+        After calling this req_to_install will only have satisfied_by set to
+        None if the req_to_install is to be upgraded/reinstalled etc. Any
+        other value will be a dist recording the current thing installed that
+        satisfies the requirement.
+
+        Note that for vcs urls and the like we can't assess skipping in this
+        routine - we simply identify that we need to pull the thing down,
+        then later on it is pulled down and introspected to assess upgrade/
+        reinstalls etc.
+
+        :return: A text reason for why it was skipped, or None.
+        """
+        if self.ignore_installed:
+            return None
+
+        req_to_install.check_if_exists(self.use_user_site)
+        if not req_to_install.satisfied_by:
+            return None
+
+        if self.force_reinstall:
+            self._set_req_to_reinstall(req_to_install)
+            return None
+
+        if not self._is_upgrade_allowed(req_to_install):
+            if self.upgrade_strategy == "only-if-needed":
+                return "already satisfied, skipping upgrade"
+            return "already satisfied"
+
+        # Check for the possibility of an upgrade.  For link-based
+        # requirements we have to pull the tree down and inspect to assess
+        # the version #, so it's handled way down.
+        if not req_to_install.link:
+            try:
+                self.finder.find_requirement(req_to_install, upgrade=True)
+            except BestVersionAlreadyInstalled:
+                # Then the best version is installed.
+                return "already up-to-date"
+            except DistributionNotFound:
+                # No distribution found, so we squash the error.  It will
+                # be raised later when we re-try later to do the install.
+                # Why don't we just raise here?
+                pass
+
+        self._set_req_to_reinstall(req_to_install)
+        return None
+
+    def _find_requirement_link(self, req: InstallRequirement) -> Optional[Link]:
+        upgrade = self._is_upgrade_allowed(req)
+        best_candidate = self.finder.find_requirement(req, upgrade)
+        if not best_candidate:
+            return None
+
+        # Log a warning per PEP 592 if necessary before returning.
+        link = best_candidate.link
+        if link.is_yanked:
+            reason = link.yanked_reason or "<none given>"
+            msg = (
+                # Mark this as a unicode string to prevent
+                # "UnicodeEncodeError: 'ascii' codec can't encode character"
+                # in Python 2 when the reason contains non-ascii characters.
+                "The candidate selected for download or install is a "
+                "yanked version: {candidate}\n"
+                "Reason for being yanked: {reason}"
+            ).format(candidate=best_candidate, reason=reason)
+            logger.warning(msg)
+
+        return link
+
+    def _populate_link(self, req: InstallRequirement) -> None:
+        """Ensure that if a link can be found for this, that it is found.
+
+        Note that req.link may still be None - if the requirement is already
+        installed and not needed to be upgraded based on the return value of
+        _is_upgrade_allowed().
+
+        If preparer.require_hashes is True, don't use the wheel cache, because
+        cached wheels, always built locally, have different hashes than the
+        files downloaded from the index server and thus throw false hash
+        mismatches. Furthermore, cached wheels at present have undeterministic
+        contents due to file modification times.
+        """
+        if req.link is None:
+            req.link = self._find_requirement_link(req)
+
+        if self.wheel_cache is None or self.preparer.require_hashes:
+            return
+        cache_entry = self.wheel_cache.get_cache_entry(
+            link=req.link,
+            package_name=req.name,
+            supported_tags=get_supported(),
+        )
+        if cache_entry is not None:
+            logger.debug("Using cached wheel link: %s", cache_entry.link)
+            if req.link is req.original_link and cache_entry.persistent:
+                req.original_link_is_in_wheel_cache = True
+            if cache_entry.origin is not None:
+                req.download_info = cache_entry.origin
+            else:
+                # Legacy cache entry that does not have origin.json.
+                # download_info may miss the archive_info.hash field.
+                req.download_info = direct_url_from_link(
+                    req.link, link_is_in_wheel_cache=cache_entry.persistent
+                )
+            req.link = cache_entry.link
+
+    def _get_dist_for(self, req: InstallRequirement) -> BaseDistribution:
+        """Takes a InstallRequirement and returns a single AbstractDist \
+        representing a prepared variant of the same.
+        """
+        if req.editable:
+            return self.preparer.prepare_editable_requirement(req)
+
+        # satisfied_by is only evaluated by calling _check_skip_installed,
+        # so it must be None here.
+        assert req.satisfied_by is None
+        skip_reason = self._check_skip_installed(req)
+
+        if req.satisfied_by:
+            return self.preparer.prepare_installed_requirement(req, skip_reason)
+
+        # We eagerly populate the link, since that's our "legacy" behavior.
+        self._populate_link(req)
+        dist = self.preparer.prepare_linked_requirement(req)
+
+        # NOTE
+        # The following portion is for determining if a certain package is
+        # going to be re-installed/upgraded or not and reporting to the user.
+        # This should probably get cleaned up in a future refactor.
+
+        # req.req is only avail after unpack for URL
+        # pkgs repeat check_if_exists to uninstall-on-upgrade
+        # (#14)
+        if not self.ignore_installed:
+            req.check_if_exists(self.use_user_site)
+
+        if req.satisfied_by:
+            should_modify = (
+                self.upgrade_strategy != "to-satisfy-only"
+                or self.force_reinstall
+                or self.ignore_installed
+                or req.link.scheme == "file"
+            )
+            if should_modify:
+                self._set_req_to_reinstall(req)
+            else:
+                logger.info(
+                    "Requirement already satisfied (use --upgrade to upgrade): %s",
+                    req,
+                )
+        return dist
+
+    def _resolve_one(
+        self,
+        requirement_set: RequirementSet,
+        req_to_install: InstallRequirement,
+    ) -> List[InstallRequirement]:
+        """Prepare a single requirements file.
+
+        :return: A list of additional InstallRequirements to also install.
+        """
+        # Tell user what we are doing for this requirement:
+        # obtain (editable), skipping, processing (local url), collecting
+        # (remote url or package name)
+        if req_to_install.constraint or req_to_install.prepared:
+            return []
+
+        req_to_install.prepared = True
+
+        # Parse and return dependencies
+        dist = self._get_dist_for(req_to_install)
+        # This will raise UnsupportedPythonVersion if the given Python
+        # version isn't compatible with the distribution's Requires-Python.
+        _check_dist_requires_python(
+            dist,
+            version_info=self._py_version_info,
+            ignore_requires_python=self.ignore_requires_python,
+        )
+
+        more_reqs: List[InstallRequirement] = []
+
+        def add_req(subreq: Requirement, extras_requested: Iterable[str]) -> None:
+            # This idiosyncratically converts the Requirement to str and let
+            # make_install_req then parse it again into Requirement. But this is
+            # the legacy resolver so I'm just not going to bother refactoring.
+            sub_install_req = self._make_install_req(str(subreq), req_to_install)
+            parent_req_name = req_to_install.name
+            to_scan_again, add_to_parent = self._add_requirement_to_set(
+                requirement_set,
+                sub_install_req,
+                parent_req_name=parent_req_name,
+                extras_requested=extras_requested,
+            )
+            if parent_req_name and add_to_parent:
+                self._discovered_dependencies[parent_req_name].append(add_to_parent)
+            more_reqs.extend(to_scan_again)
+
+        with indent_log():
+            # We add req_to_install before its dependencies, so that we
+            # can refer to it when adding dependencies.
+            if not requirement_set.has_requirement(req_to_install.name):
+                # 'unnamed' requirements will get added here
+                # 'unnamed' requirements can only come from being directly
+                # provided by the user.
+                assert req_to_install.user_supplied
+                self._add_requirement_to_set(
+                    requirement_set, req_to_install, parent_req_name=None
+                )
+
+            if not self.ignore_dependencies:
+                if req_to_install.extras:
+                    logger.debug(
+                        "Installing extra requirements: %r",
+                        ",".join(req_to_install.extras),
+                    )
+                missing_requested = sorted(
+                    set(req_to_install.extras) - set(dist.iter_provided_extras())
+                )
+                for missing in missing_requested:
+                    logger.warning(
+                        "%s %s does not provide the extra '%s'",
+                        dist.raw_name,
+                        dist.version,
+                        missing,
+                    )
+
+                available_requested = sorted(
+                    set(dist.iter_provided_extras()) & set(req_to_install.extras)
+                )
+                for subreq in dist.iter_dependencies(available_requested):
+                    add_req(subreq, extras_requested=available_requested)
+
+        return more_reqs
+
+    def get_installation_order(
+        self, req_set: RequirementSet
+    ) -> List[InstallRequirement]:
+        """Create the installation order.
+
+        The installation order is topological - requirements are installed
+        before the requiring thing. We break cycles at an arbitrary point,
+        and make no other guarantees.
+        """
+        # The current implementation, which we may change at any point
+        # installs the user specified things in the order given, except when
+        # dependencies must come earlier to achieve topological order.
+        order = []
+        ordered_reqs: Set[InstallRequirement] = set()
+
+        def schedule(req: InstallRequirement) -> None:
+            if req.satisfied_by or req in ordered_reqs:
+                return
+            if req.constraint:
+                return
+            ordered_reqs.add(req)
+            for dep in self._discovered_dependencies[req.name]:
+                schedule(dep)
+            order.append(req)
+
+        for install_req in req_set.requirements.values():
+            schedule(install_req)
+        return order
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/base.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/base.py
new file mode 100644
index 0000000..b206692
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/base.py
@@ -0,0 +1,141 @@
+from typing import FrozenSet, Iterable, Optional, Tuple, Union
+
+from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+from pip._vendor.packaging.version import LegacyVersion, Version
+
+from pip._internal.models.link import Link, links_equivalent
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.hashes import Hashes
+
+CandidateLookup = Tuple[Optional["Candidate"], Optional[InstallRequirement]]
+CandidateVersion = Union[LegacyVersion, Version]
+
+
+def format_name(project: str, extras: FrozenSet[str]) -> str:
+    if not extras:
+        return project
+    canonical_extras = sorted(canonicalize_name(e) for e in extras)
+    return "{}[{}]".format(project, ",".join(canonical_extras))
+
+
+class Constraint:
+    def __init__(
+        self, specifier: SpecifierSet, hashes: Hashes, links: FrozenSet[Link]
+    ) -> None:
+        self.specifier = specifier
+        self.hashes = hashes
+        self.links = links
+
+    @classmethod
+    def empty(cls) -> "Constraint":
+        return Constraint(SpecifierSet(), Hashes(), frozenset())
+
+    @classmethod
+    def from_ireq(cls, ireq: InstallRequirement) -> "Constraint":
+        links = frozenset([ireq.link]) if ireq.link else frozenset()
+        return Constraint(ireq.specifier, ireq.hashes(trust_internet=False), links)
+
+    def __bool__(self) -> bool:
+        return bool(self.specifier) or bool(self.hashes) or bool(self.links)
+
+    def __and__(self, other: InstallRequirement) -> "Constraint":
+        if not isinstance(other, InstallRequirement):
+            return NotImplemented
+        specifier = self.specifier & other.specifier
+        hashes = self.hashes & other.hashes(trust_internet=False)
+        links = self.links
+        if other.link:
+            links = links.union([other.link])
+        return Constraint(specifier, hashes, links)
+
+    def is_satisfied_by(self, candidate: "Candidate") -> bool:
+        # Reject if there are any mismatched URL constraints on this package.
+        if self.links and not all(_match_link(link, candidate) for link in self.links):
+            return False
+        # We can safely always allow prereleases here since PackageFinder
+        # already implements the prerelease logic, and would have filtered out
+        # prerelease candidates if the user does not expect them.
+        return self.specifier.contains(candidate.version, prereleases=True)
+
+
+class Requirement:
+    @property
+    def project_name(self) -> NormalizedName:
+        """The "project name" of a requirement.
+
+        This is different from ``name`` if this requirement contains extras,
+        in which case ``name`` would contain the ``[...]`` part, while this
+        refers to the name of the project.
+        """
+        raise NotImplementedError("Subclass should override")
+
+    @property
+    def name(self) -> str:
+        """The name identifying this requirement in the resolver.
+
+        This is different from ``project_name`` if this requirement contains
+        extras, where ``project_name`` would not contain the ``[...]`` part.
+        """
+        raise NotImplementedError("Subclass should override")
+
+    def is_satisfied_by(self, candidate: "Candidate") -> bool:
+        return False
+
+    def get_candidate_lookup(self) -> CandidateLookup:
+        raise NotImplementedError("Subclass should override")
+
+    def format_for_error(self) -> str:
+        raise NotImplementedError("Subclass should override")
+
+
+def _match_link(link: Link, candidate: "Candidate") -> bool:
+    if candidate.source_link:
+        return links_equivalent(link, candidate.source_link)
+    return False
+
+
+class Candidate:
+    @property
+    def project_name(self) -> NormalizedName:
+        """The "project name" of the candidate.
+
+        This is different from ``name`` if this candidate contains extras,
+        in which case ``name`` would contain the ``[...]`` part, while this
+        refers to the name of the project.
+        """
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def name(self) -> str:
+        """The name identifying this candidate in the resolver.
+
+        This is different from ``project_name`` if this candidate contains
+        extras, where ``project_name`` would not contain the ``[...]`` part.
+        """
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def version(self) -> CandidateVersion:
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def is_installed(self) -> bool:
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def is_editable(self) -> bool:
+        raise NotImplementedError("Override in subclass")
+
+    @property
+    def source_link(self) -> Optional[Link]:
+        raise NotImplementedError("Override in subclass")
+
+    def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requirement]]:
+        raise NotImplementedError("Override in subclass")
+
+    def get_install_requirement(self) -> Optional[InstallRequirement]:
+        raise NotImplementedError("Override in subclass")
+
+    def format_for_error(self) -> str:
+        raise NotImplementedError("Subclass should override")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/candidates.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/candidates.py
new file mode 100644
index 0000000..f5bc343
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/candidates.py
@@ -0,0 +1,556 @@
+import logging
+import sys
+from typing import TYPE_CHECKING, Any, FrozenSet, Iterable, Optional, Tuple, Union, cast
+
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+from pip._vendor.packaging.version import Version
+
+from pip._internal.exceptions import (
+    HashError,
+    InstallationSubprocessError,
+    MetadataInconsistent,
+)
+from pip._internal.metadata import BaseDistribution
+from pip._internal.models.link import Link, links_equivalent
+from pip._internal.models.wheel import Wheel
+from pip._internal.req.constructors import (
+    install_req_from_editable,
+    install_req_from_line,
+)
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.direct_url_helpers import direct_url_from_link
+from pip._internal.utils.misc import normalize_version_info
+
+from .base import Candidate, CandidateVersion, Requirement, format_name
+
+if TYPE_CHECKING:
+    from .factory import Factory
+
+logger = logging.getLogger(__name__)
+
+BaseCandidate = Union[
+    "AlreadyInstalledCandidate",
+    "EditableCandidate",
+    "LinkCandidate",
+]
+
+# Avoid conflicting with the PyPI package "Python".
+REQUIRES_PYTHON_IDENTIFIER = cast(NormalizedName, "<Python from Requires-Python>")
+
+
+def as_base_candidate(candidate: Candidate) -> Optional[BaseCandidate]:
+    """The runtime version of BaseCandidate."""
+    base_candidate_classes = (
+        AlreadyInstalledCandidate,
+        EditableCandidate,
+        LinkCandidate,
+    )
+    if isinstance(candidate, base_candidate_classes):
+        return candidate
+    return None
+
+
+def make_install_req_from_link(
+    link: Link, template: InstallRequirement
+) -> InstallRequirement:
+    assert not template.editable, "template is editable"
+    if template.req:
+        line = str(template.req)
+    else:
+        line = link.url
+    ireq = install_req_from_line(
+        line,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options,
+        ),
+        config_settings=template.config_settings,
+    )
+    ireq.original_link = template.original_link
+    ireq.link = link
+    return ireq
+
+
+def make_install_req_from_editable(
+    link: Link, template: InstallRequirement
+) -> InstallRequirement:
+    assert template.editable, "template not editable"
+    return install_req_from_editable(
+        link.url,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        permit_editable_wheels=template.permit_editable_wheels,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options,
+        ),
+        config_settings=template.config_settings,
+    )
+
+
+def _make_install_req_from_dist(
+    dist: BaseDistribution, template: InstallRequirement
+) -> InstallRequirement:
+    if template.req:
+        line = str(template.req)
+    elif template.link:
+        line = f"{dist.canonical_name} @ {template.link.url}"
+    else:
+        line = f"{dist.canonical_name}=={dist.version}"
+    ireq = install_req_from_line(
+        line,
+        user_supplied=template.user_supplied,
+        comes_from=template.comes_from,
+        use_pep517=template.use_pep517,
+        isolated=template.isolated,
+        constraint=template.constraint,
+        options=dict(
+            install_options=template.install_options,
+            global_options=template.global_options,
+            hashes=template.hash_options,
+        ),
+        config_settings=template.config_settings,
+    )
+    ireq.satisfied_by = dist
+    return ireq
+
+
+class _InstallRequirementBackedCandidate(Candidate):
+    """A candidate backed by an ``InstallRequirement``.
+
+    This represents a package request with the target not being already
+    in the environment, and needs to be fetched and installed. The backing
+    ``InstallRequirement`` is responsible for most of the leg work; this
+    class exposes appropriate information to the resolver.
+
+    :param link: The link passed to the ``InstallRequirement``. The backing
+        ``InstallRequirement`` will use this link to fetch the distribution.
+    :param source_link: The link this candidate "originates" from. This is
+        different from ``link`` when the link is found in the wheel cache.
+        ``link`` would point to the wheel cache, while this points to the
+        found remote link (e.g. from pypi.org).
+    """
+
+    dist: BaseDistribution
+    is_installed = False
+
+    def __init__(
+        self,
+        link: Link,
+        source_link: Link,
+        ireq: InstallRequirement,
+        factory: "Factory",
+        name: Optional[NormalizedName] = None,
+        version: Optional[CandidateVersion] = None,
+    ) -> None:
+        self._link = link
+        self._source_link = source_link
+        self._factory = factory
+        self._ireq = ireq
+        self._name = name
+        self._version = version
+        self.dist = self._prepare()
+
+    def __str__(self) -> str:
+        return f"{self.name} {self.version}"
+
+    def __repr__(self) -> str:
+        return "{class_name}({link!r})".format(
+            class_name=self.__class__.__name__,
+            link=str(self._link),
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.__class__, self._link))
+
+    def __eq__(self, other: Any) -> bool:
+        if isinstance(other, self.__class__):
+            return links_equivalent(self._link, other._link)
+        return False
+
+    @property
+    def source_link(self) -> Optional[Link]:
+        return self._source_link
+
+    @property
+    def project_name(self) -> NormalizedName:
+        """The normalised name of the project the candidate refers to"""
+        if self._name is None:
+            self._name = self.dist.canonical_name
+        return self._name
+
+    @property
+    def name(self) -> str:
+        return self.project_name
+
+    @property
+    def version(self) -> CandidateVersion:
+        if self._version is None:
+            self._version = self.dist.version
+        return self._version
+
+    def format_for_error(self) -> str:
+        return "{} {} (from {})".format(
+            self.name,
+            self.version,
+            self._link.file_path if self._link.is_file else self._link,
+        )
+
+    def _prepare_distribution(self) -> BaseDistribution:
+        raise NotImplementedError("Override in subclass")
+
+    def _check_metadata_consistency(self, dist: BaseDistribution) -> None:
+        """Check for consistency of project name and version of dist."""
+        if self._name is not None and self._name != dist.canonical_name:
+            raise MetadataInconsistent(
+                self._ireq,
+                "name",
+                self._name,
+                dist.canonical_name,
+            )
+        if self._version is not None and self._version != dist.version:
+            raise MetadataInconsistent(
+                self._ireq,
+                "version",
+                str(self._version),
+                str(dist.version),
+            )
+
+    def _prepare(self) -> BaseDistribution:
+        try:
+            dist = self._prepare_distribution()
+        except HashError as e:
+            # Provide HashError the underlying ireq that caused it. This
+            # provides context for the resulting error message to show the
+            # offending line to the user.
+            e.req = self._ireq
+            raise
+        except InstallationSubprocessError as exc:
+            # The output has been presented already, so don't duplicate it.
+            exc.context = "See above for output."
+            raise
+
+        self._check_metadata_consistency(dist)
+        return dist
+
+    def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requirement]]:
+        requires = self.dist.iter_dependencies() if with_requires else ()
+        for r in requires:
+            yield self._factory.make_requirement_from_spec(str(r), self._ireq)
+        yield self._factory.make_requires_python_requirement(self.dist.requires_python)
+
+    def get_install_requirement(self) -> Optional[InstallRequirement]:
+        return self._ireq
+
+
+class LinkCandidate(_InstallRequirementBackedCandidate):
+    is_editable = False
+
+    def __init__(
+        self,
+        link: Link,
+        template: InstallRequirement,
+        factory: "Factory",
+        name: Optional[NormalizedName] = None,
+        version: Optional[CandidateVersion] = None,
+    ) -> None:
+        source_link = link
+        cache_entry = factory.get_wheel_cache_entry(link, name)
+        if cache_entry is not None:
+            logger.debug("Using cached wheel link: %s", cache_entry.link)
+            link = cache_entry.link
+        ireq = make_install_req_from_link(link, template)
+        assert ireq.link == link
+        if ireq.link.is_wheel and not ireq.link.is_file:
+            wheel = Wheel(ireq.link.filename)
+            wheel_name = canonicalize_name(wheel.name)
+            assert name == wheel_name, f"{name!r} != {wheel_name!r} for wheel"
+            # Version may not be present for PEP 508 direct URLs
+            if version is not None:
+                wheel_version = Version(wheel.version)
+                assert version == wheel_version, "{!r} != {!r} for wheel {}".format(
+                    version, wheel_version, name
+                )
+
+        if cache_entry is not None:
+            if cache_entry.persistent and template.link is template.original_link:
+                ireq.original_link_is_in_wheel_cache = True
+            if cache_entry.origin is not None:
+                ireq.download_info = cache_entry.origin
+            else:
+                # Legacy cache entry that does not have origin.json.
+                # download_info may miss the archive_info.hash field.
+                ireq.download_info = direct_url_from_link(
+                    source_link, link_is_in_wheel_cache=cache_entry.persistent
+                )
+
+        super().__init__(
+            link=link,
+            source_link=source_link,
+            ireq=ireq,
+            factory=factory,
+            name=name,
+            version=version,
+        )
+
+    def _prepare_distribution(self) -> BaseDistribution:
+        preparer = self._factory.preparer
+        return preparer.prepare_linked_requirement(self._ireq, parallel_builds=True)
+
+
+class EditableCandidate(_InstallRequirementBackedCandidate):
+    is_editable = True
+
+    def __init__(
+        self,
+        link: Link,
+        template: InstallRequirement,
+        factory: "Factory",
+        name: Optional[NormalizedName] = None,
+        version: Optional[CandidateVersion] = None,
+    ) -> None:
+        super().__init__(
+            link=link,
+            source_link=link,
+            ireq=make_install_req_from_editable(link, template),
+            factory=factory,
+            name=name,
+            version=version,
+        )
+
+    def _prepare_distribution(self) -> BaseDistribution:
+        return self._factory.preparer.prepare_editable_requirement(self._ireq)
+
+
+class AlreadyInstalledCandidate(Candidate):
+    is_installed = True
+    source_link = None
+
+    def __init__(
+        self,
+        dist: BaseDistribution,
+        template: InstallRequirement,
+        factory: "Factory",
+    ) -> None:
+        self.dist = dist
+        self._ireq = _make_install_req_from_dist(dist, template)
+        self._factory = factory
+
+        # This is just logging some messages, so we can do it eagerly.
+        # The returned dist would be exactly the same as self.dist because we
+        # set satisfied_by in _make_install_req_from_dist.
+        # TODO: Supply reason based on force_reinstall and upgrade_strategy.
+        skip_reason = "already satisfied"
+        factory.preparer.prepare_installed_requirement(self._ireq, skip_reason)
+
+    def __str__(self) -> str:
+        return str(self.dist)
+
+    def __repr__(self) -> str:
+        return "{class_name}({distribution!r})".format(
+            class_name=self.__class__.__name__,
+            distribution=self.dist,
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.__class__, self.name, self.version))
+
+    def __eq__(self, other: Any) -> bool:
+        if isinstance(other, self.__class__):
+            return self.name == other.name and self.version == other.version
+        return False
+
+    @property
+    def project_name(self) -> NormalizedName:
+        return self.dist.canonical_name
+
+    @property
+    def name(self) -> str:
+        return self.project_name
+
+    @property
+    def version(self) -> CandidateVersion:
+        return self.dist.version
+
+    @property
+    def is_editable(self) -> bool:
+        return self.dist.editable
+
+    def format_for_error(self) -> str:
+        return f"{self.name} {self.version} (Installed)"
+
+    def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requirement]]:
+        if not with_requires:
+            return
+        for r in self.dist.iter_dependencies():
+            yield self._factory.make_requirement_from_spec(str(r), self._ireq)
+
+    def get_install_requirement(self) -> Optional[InstallRequirement]:
+        return None
+
+
+class ExtrasCandidate(Candidate):
+    """A candidate that has 'extras', indicating additional dependencies.
+
+    Requirements can be for a project with dependencies, something like
+    foo[extra].  The extras don't affect the project/version being installed
+    directly, but indicate that we need additional dependencies. We model that
+    by having an artificial ExtrasCandidate that wraps the "base" candidate.
+
+    The ExtrasCandidate differs from the base in the following ways:
+
+    1. It has a unique name, of the form foo[extra]. This causes the resolver
+       to treat it as a separate node in the dependency graph.
+    2. When we're getting the candidate's dependencies,
+       a) We specify that we want the extra dependencies as well.
+       b) We add a dependency on the base candidate.
+          See below for why this is needed.
+    3. We return None for the underlying InstallRequirement, as the base
+       candidate will provide it, and we don't want to end up with duplicates.
+
+    The dependency on the base candidate is needed so that the resolver can't
+    decide that it should recommend foo[extra1] version 1.0 and foo[extra2]
+    version 2.0. Having those candidates depend on foo=1.0 and foo=2.0
+    respectively forces the resolver to recognise that this is a conflict.
+    """
+
+    def __init__(
+        self,
+        base: BaseCandidate,
+        extras: FrozenSet[str],
+    ) -> None:
+        self.base = base
+        self.extras = extras
+
+    def __str__(self) -> str:
+        name, rest = str(self.base).split(" ", 1)
+        return "{}[{}] {}".format(name, ",".join(self.extras), rest)
+
+    def __repr__(self) -> str:
+        return "{class_name}(base={base!r}, extras={extras!r})".format(
+            class_name=self.__class__.__name__,
+            base=self.base,
+            extras=self.extras,
+        )
+
+    def __hash__(self) -> int:
+        return hash((self.base, self.extras))
+
+    def __eq__(self, other: Any) -> bool:
+        if isinstance(other, self.__class__):
+            return self.base == other.base and self.extras == other.extras
+        return False
+
+    @property
+    def project_name(self) -> NormalizedName:
+        return self.base.project_name
+
+    @property
+    def name(self) -> str:
+        """The normalised name of the project the candidate refers to"""
+        return format_name(self.base.project_name, self.extras)
+
+    @property
+    def version(self) -> CandidateVersion:
+        return self.base.version
+
+    def format_for_error(self) -> str:
+        return "{} [{}]".format(
+            self.base.format_for_error(), ", ".join(sorted(self.extras))
+        )
+
+    @property
+    def is_installed(self) -> bool:
+        return self.base.is_installed
+
+    @property
+    def is_editable(self) -> bool:
+        return self.base.is_editable
+
+    @property
+    def source_link(self) -> Optional[Link]:
+        return self.base.source_link
+
+    def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requirement]]:
+        factory = self.base._factory
+
+        # Add a dependency on the exact base
+        # (See note 2b in the class docstring)
+        yield factory.make_requirement_from_candidate(self.base)
+        if not with_requires:
+            return
+
+        # The user may have specified extras that the candidate doesn't
+        # support. We ignore any unsupported extras here.
+        valid_extras = self.extras.intersection(self.base.dist.iter_provided_extras())
+        invalid_extras = self.extras.difference(self.base.dist.iter_provided_extras())
+        for extra in sorted(invalid_extras):
+            logger.warning(
+                "%s %s does not provide the extra '%s'",
+                self.base.name,
+                self.version,
+                extra,
+            )
+
+        for r in self.base.dist.iter_dependencies(valid_extras):
+            requirement = factory.make_requirement_from_spec(
+                str(r), self.base._ireq, valid_extras
+            )
+            if requirement:
+                yield requirement
+
+    def get_install_requirement(self) -> Optional[InstallRequirement]:
+        # We don't return anything here, because we always
+        # depend on the base candidate, and we'll get the
+        # install requirement from that.
+        return None
+
+
+class RequiresPythonCandidate(Candidate):
+    is_installed = False
+    source_link = None
+
+    def __init__(self, py_version_info: Optional[Tuple[int, ...]]) -> None:
+        if py_version_info is not None:
+            version_info = normalize_version_info(py_version_info)
+        else:
+            version_info = sys.version_info[:3]
+        self._version = Version(".".join(str(c) for c in version_info))
+
+    # We don't need to implement __eq__() and __ne__() since there is always
+    # only one RequiresPythonCandidate in a resolution, i.e. the host Python.
+    # The built-in object.__eq__() and object.__ne__() do exactly what we want.
+
+    def __str__(self) -> str:
+        return f"Python {self._version}"
+
+    @property
+    def project_name(self) -> NormalizedName:
+        return REQUIRES_PYTHON_IDENTIFIER
+
+    @property
+    def name(self) -> str:
+        return REQUIRES_PYTHON_IDENTIFIER
+
+    @property
+    def version(self) -> CandidateVersion:
+        return self._version
+
+    def format_for_error(self) -> str:
+        return f"Python {self.version}"
+
+    def iter_dependencies(self, with_requires: bool) -> Iterable[Optional[Requirement]]:
+        return ()
+
+    def get_install_requirement(self) -> Optional[InstallRequirement]:
+        return None
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/factory.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/factory.py
new file mode 100644
index 0000000..a4c24b5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/factory.py
@@ -0,0 +1,731 @@
+import contextlib
+import functools
+import logging
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    FrozenSet,
+    Iterable,
+    Iterator,
+    List,
+    Mapping,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    TypeVar,
+    cast,
+)
+
+from pip._vendor.packaging.requirements import InvalidRequirement
+from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+from pip._vendor.resolvelib import ResolutionImpossible
+
+from pip._internal.cache import CacheEntry, WheelCache
+from pip._internal.exceptions import (
+    DistributionNotFound,
+    InstallationError,
+    MetadataInconsistent,
+    UnsupportedPythonVersion,
+    UnsupportedWheel,
+)
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import BaseDistribution, get_default_environment
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.constructors import install_req_from_link_and_ireq
+from pip._internal.req.req_install import (
+    InstallRequirement,
+    check_invalid_constraint_type,
+)
+from pip._internal.resolution.base import InstallRequirementProvider
+from pip._internal.utils.compatibility_tags import get_supported
+from pip._internal.utils.hashes import Hashes
+from pip._internal.utils.packaging import get_requirement
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+from .base import Candidate, CandidateVersion, Constraint, Requirement
+from .candidates import (
+    AlreadyInstalledCandidate,
+    BaseCandidate,
+    EditableCandidate,
+    ExtrasCandidate,
+    LinkCandidate,
+    RequiresPythonCandidate,
+    as_base_candidate,
+)
+from .found_candidates import FoundCandidates, IndexCandidateInfo
+from .requirements import (
+    ExplicitRequirement,
+    RequiresPythonRequirement,
+    SpecifierRequirement,
+    UnsatisfiableRequirement,
+)
+
+if TYPE_CHECKING:
+    from typing import Protocol
+
+    class ConflictCause(Protocol):
+        requirement: RequiresPythonRequirement
+        parent: Candidate
+
+
+logger = logging.getLogger(__name__)
+
+C = TypeVar("C")
+Cache = Dict[Link, C]
+
+
+class CollectedRootRequirements(NamedTuple):
+    requirements: List[Requirement]
+    constraints: Dict[str, Constraint]
+    user_requested: Dict[str, int]
+
+
+class Factory:
+    def __init__(
+        self,
+        finder: PackageFinder,
+        preparer: RequirementPreparer,
+        make_install_req: InstallRequirementProvider,
+        wheel_cache: Optional[WheelCache],
+        use_user_site: bool,
+        force_reinstall: bool,
+        ignore_installed: bool,
+        ignore_requires_python: bool,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+    ) -> None:
+        self._finder = finder
+        self.preparer = preparer
+        self._wheel_cache = wheel_cache
+        self._python_candidate = RequiresPythonCandidate(py_version_info)
+        self._make_install_req_from_spec = make_install_req
+        self._use_user_site = use_user_site
+        self._force_reinstall = force_reinstall
+        self._ignore_requires_python = ignore_requires_python
+
+        self._build_failures: Cache[InstallationError] = {}
+        self._link_candidate_cache: Cache[LinkCandidate] = {}
+        self._editable_candidate_cache: Cache[EditableCandidate] = {}
+        self._installed_candidate_cache: Dict[str, AlreadyInstalledCandidate] = {}
+        self._extras_candidate_cache: Dict[
+            Tuple[int, FrozenSet[str]], ExtrasCandidate
+        ] = {}
+
+        if not ignore_installed:
+            env = get_default_environment()
+            self._installed_dists = {
+                dist.canonical_name: dist
+                for dist in env.iter_installed_distributions(local_only=False)
+            }
+        else:
+            self._installed_dists = {}
+
+    @property
+    def force_reinstall(self) -> bool:
+        return self._force_reinstall
+
+    def _fail_if_link_is_unsupported_wheel(self, link: Link) -> None:
+        if not link.is_wheel:
+            return
+        wheel = Wheel(link.filename)
+        if wheel.supported(self._finder.target_python.get_tags()):
+            return
+        msg = f"{link.filename} is not a supported wheel on this platform."
+        raise UnsupportedWheel(msg)
+
+    def _make_extras_candidate(
+        self, base: BaseCandidate, extras: FrozenSet[str]
+    ) -> ExtrasCandidate:
+        cache_key = (id(base), extras)
+        try:
+            candidate = self._extras_candidate_cache[cache_key]
+        except KeyError:
+            candidate = ExtrasCandidate(base, extras)
+            self._extras_candidate_cache[cache_key] = candidate
+        return candidate
+
+    def _make_candidate_from_dist(
+        self,
+        dist: BaseDistribution,
+        extras: FrozenSet[str],
+        template: InstallRequirement,
+    ) -> Candidate:
+        try:
+            base = self._installed_candidate_cache[dist.canonical_name]
+        except KeyError:
+            base = AlreadyInstalledCandidate(dist, template, factory=self)
+            self._installed_candidate_cache[dist.canonical_name] = base
+        if not extras:
+            return base
+        return self._make_extras_candidate(base, extras)
+
+    def _make_candidate_from_link(
+        self,
+        link: Link,
+        extras: FrozenSet[str],
+        template: InstallRequirement,
+        name: Optional[NormalizedName],
+        version: Optional[CandidateVersion],
+    ) -> Optional[Candidate]:
+        # TODO: Check already installed candidate, and use it if the link and
+        # editable flag match.
+
+        if link in self._build_failures:
+            # We already tried this candidate before, and it does not build.
+            # Don't bother trying again.
+            return None
+
+        if template.editable:
+            if link not in self._editable_candidate_cache:
+                try:
+                    self._editable_candidate_cache[link] = EditableCandidate(
+                        link,
+                        template,
+                        factory=self,
+                        name=name,
+                        version=version,
+                    )
+                except MetadataInconsistent as e:
+                    logger.info(
+                        "Discarding [blue underline]%s[/]: [yellow]%s[reset]",
+                        link,
+                        e,
+                        extra={"markup": True},
+                    )
+                    self._build_failures[link] = e
+                    return None
+
+            base: BaseCandidate = self._editable_candidate_cache[link]
+        else:
+            if link not in self._link_candidate_cache:
+                try:
+                    self._link_candidate_cache[link] = LinkCandidate(
+                        link,
+                        template,
+                        factory=self,
+                        name=name,
+                        version=version,
+                    )
+                except MetadataInconsistent as e:
+                    logger.info(
+                        "Discarding [blue underline]%s[/]: [yellow]%s[reset]",
+                        link,
+                        e,
+                        extra={"markup": True},
+                    )
+                    self._build_failures[link] = e
+                    return None
+            base = self._link_candidate_cache[link]
+
+        if not extras:
+            return base
+        return self._make_extras_candidate(base, extras)
+
+    def _iter_found_candidates(
+        self,
+        ireqs: Sequence[InstallRequirement],
+        specifier: SpecifierSet,
+        hashes: Hashes,
+        prefers_installed: bool,
+        incompatible_ids: Set[int],
+    ) -> Iterable[Candidate]:
+        if not ireqs:
+            return ()
+
+        # The InstallRequirement implementation requires us to give it a
+        # "template". Here we just choose the first requirement to represent
+        # all of them.
+        # Hopefully the Project model can correct this mismatch in the future.
+        template = ireqs[0]
+        assert template.req, "Candidates found on index must be PEP 508"
+        name = canonicalize_name(template.req.name)
+
+        extras: FrozenSet[str] = frozenset()
+        for ireq in ireqs:
+            assert ireq.req, "Candidates found on index must be PEP 508"
+            specifier &= ireq.req.specifier
+            hashes &= ireq.hashes(trust_internet=False)
+            extras |= frozenset(ireq.extras)
+
+        def _get_installed_candidate() -> Optional[Candidate]:
+            """Get the candidate for the currently-installed version."""
+            # If --force-reinstall is set, we want the version from the index
+            # instead, so we "pretend" there is nothing installed.
+            if self._force_reinstall:
+                return None
+            try:
+                installed_dist = self._installed_dists[name]
+            except KeyError:
+                return None
+            # Don't use the installed distribution if its version does not fit
+            # the current dependency graph.
+            if not specifier.contains(installed_dist.version, prereleases=True):
+                return None
+            candidate = self._make_candidate_from_dist(
+                dist=installed_dist,
+                extras=extras,
+                template=template,
+            )
+            # The candidate is a known incompatibility. Don't use it.
+            if id(candidate) in incompatible_ids:
+                return None
+            return candidate
+
+        def iter_index_candidate_infos() -> Iterator[IndexCandidateInfo]:
+            result = self._finder.find_best_candidate(
+                project_name=name,
+                specifier=specifier,
+                hashes=hashes,
+            )
+            icans = list(result.iter_applicable())
+
+            # PEP 592: Yanked releases are ignored unless the specifier
+            # explicitly pins a version (via '==' or '===') that can be
+            # solely satisfied by a yanked release.
+            all_yanked = all(ican.link.is_yanked for ican in icans)
+
+            def is_pinned(specifier: SpecifierSet) -> bool:
+                for sp in specifier:
+                    if sp.operator == "===":
+                        return True
+                    if sp.operator != "==":
+                        continue
+                    if sp.version.endswith(".*"):
+                        continue
+                    return True
+                return False
+
+            pinned = is_pinned(specifier)
+
+            # PackageFinder returns earlier versions first, so we reverse.
+            for ican in reversed(icans):
+                if not (all_yanked and pinned) and ican.link.is_yanked:
+                    continue
+                func = functools.partial(
+                    self._make_candidate_from_link,
+                    link=ican.link,
+                    extras=extras,
+                    template=template,
+                    name=name,
+                    version=ican.version,
+                )
+                yield ican.version, func
+
+        return FoundCandidates(
+            iter_index_candidate_infos,
+            _get_installed_candidate(),
+            prefers_installed,
+            incompatible_ids,
+        )
+
+    def _iter_explicit_candidates_from_base(
+        self,
+        base_requirements: Iterable[Requirement],
+        extras: FrozenSet[str],
+    ) -> Iterator[Candidate]:
+        """Produce explicit candidates from the base given an extra-ed package.
+
+        :param base_requirements: Requirements known to the resolver. The
+            requirements are guaranteed to not have extras.
+        :param extras: The extras to inject into the explicit requirements'
+            candidates.
+        """
+        for req in base_requirements:
+            lookup_cand, _ = req.get_candidate_lookup()
+            if lookup_cand is None:  # Not explicit.
+                continue
+            # We've stripped extras from the identifier, and should always
+            # get a BaseCandidate here, unless there's a bug elsewhere.
+            base_cand = as_base_candidate(lookup_cand)
+            assert base_cand is not None, "no extras here"
+            yield self._make_extras_candidate(base_cand, extras)
+
+    def _iter_candidates_from_constraints(
+        self,
+        identifier: str,
+        constraint: Constraint,
+        template: InstallRequirement,
+    ) -> Iterator[Candidate]:
+        """Produce explicit candidates from constraints.
+
+        This creates "fake" InstallRequirement objects that are basically clones
+        of what "should" be the template, but with original_link set to link.
+        """
+        for link in constraint.links:
+            self._fail_if_link_is_unsupported_wheel(link)
+            candidate = self._make_candidate_from_link(
+                link,
+                extras=frozenset(),
+                template=install_req_from_link_and_ireq(link, template),
+                name=canonicalize_name(identifier),
+                version=None,
+            )
+            if candidate:
+                yield candidate
+
+    def find_candidates(
+        self,
+        identifier: str,
+        requirements: Mapping[str, Iterable[Requirement]],
+        incompatibilities: Mapping[str, Iterator[Candidate]],
+        constraint: Constraint,
+        prefers_installed: bool,
+    ) -> Iterable[Candidate]:
+        # Collect basic lookup information from the requirements.
+        explicit_candidates: Set[Candidate] = set()
+        ireqs: List[InstallRequirement] = []
+        for req in requirements[identifier]:
+            cand, ireq = req.get_candidate_lookup()
+            if cand is not None:
+                explicit_candidates.add(cand)
+            if ireq is not None:
+                ireqs.append(ireq)
+
+        # If the current identifier contains extras, add explicit candidates
+        # from entries from extra-less identifier.
+        with contextlib.suppress(InvalidRequirement):
+            parsed_requirement = get_requirement(identifier)
+            explicit_candidates.update(
+                self._iter_explicit_candidates_from_base(
+                    requirements.get(parsed_requirement.name, ()),
+                    frozenset(parsed_requirement.extras),
+                ),
+            )
+
+        # Add explicit candidates from constraints. We only do this if there are
+        # known ireqs, which represent requirements not already explicit. If
+        # there are no ireqs, we're constraining already-explicit requirements,
+        # which is handled later when we return the explicit candidates.
+        if ireqs:
+            try:
+                explicit_candidates.update(
+                    self._iter_candidates_from_constraints(
+                        identifier,
+                        constraint,
+                        template=ireqs[0],
+                    ),
+                )
+            except UnsupportedWheel:
+                # If we're constrained to install a wheel incompatible with the
+                # target architecture, no candidates will ever be valid.
+                return ()
+
+        # Since we cache all the candidates, incompatibility identification
+        # can be made quicker by comparing only the id() values.
+        incompat_ids = {id(c) for c in incompatibilities.get(identifier, ())}
+
+        # If none of the requirements want an explicit candidate, we can ask
+        # the finder for candidates.
+        if not explicit_candidates:
+            return self._iter_found_candidates(
+                ireqs,
+                constraint.specifier,
+                constraint.hashes,
+                prefers_installed,
+                incompat_ids,
+            )
+
+        return (
+            c
+            for c in explicit_candidates
+            if id(c) not in incompat_ids
+            and constraint.is_satisfied_by(c)
+            and all(req.is_satisfied_by(c) for req in requirements[identifier])
+        )
+
+    def _make_requirement_from_install_req(
+        self, ireq: InstallRequirement, requested_extras: Iterable[str]
+    ) -> Optional[Requirement]:
+        if not ireq.match_markers(requested_extras):
+            logger.info(
+                "Ignoring %s: markers '%s' don't match your environment",
+                ireq.name,
+                ireq.markers,
+            )
+            return None
+        if not ireq.link:
+            return SpecifierRequirement(ireq)
+        self._fail_if_link_is_unsupported_wheel(ireq.link)
+        cand = self._make_candidate_from_link(
+            ireq.link,
+            extras=frozenset(ireq.extras),
+            template=ireq,
+            name=canonicalize_name(ireq.name) if ireq.name else None,
+            version=None,
+        )
+        if cand is None:
+            # There's no way we can satisfy a URL requirement if the underlying
+            # candidate fails to build. An unnamed URL must be user-supplied, so
+            # we fail eagerly. If the URL is named, an unsatisfiable requirement
+            # can make the resolver do the right thing, either backtrack (and
+            # maybe find some other requirement that's buildable) or raise a
+            # ResolutionImpossible eventually.
+            if not ireq.name:
+                raise self._build_failures[ireq.link]
+            return UnsatisfiableRequirement(canonicalize_name(ireq.name))
+        return self.make_requirement_from_candidate(cand)
+
+    def collect_root_requirements(
+        self, root_ireqs: List[InstallRequirement]
+    ) -> CollectedRootRequirements:
+        collected = CollectedRootRequirements([], {}, {})
+        for i, ireq in enumerate(root_ireqs):
+            if ireq.constraint:
+                # Ensure we only accept valid constraints
+                problem = check_invalid_constraint_type(ireq)
+                if problem:
+                    raise InstallationError(problem)
+                if not ireq.match_markers():
+                    continue
+                assert ireq.name, "Constraint must be named"
+                name = canonicalize_name(ireq.name)
+                if name in collected.constraints:
+                    collected.constraints[name] &= ireq
+                else:
+                    collected.constraints[name] = Constraint.from_ireq(ireq)
+            else:
+                req = self._make_requirement_from_install_req(
+                    ireq,
+                    requested_extras=(),
+                )
+                if req is None:
+                    continue
+                if ireq.user_supplied and req.name not in collected.user_requested:
+                    collected.user_requested[req.name] = i
+                collected.requirements.append(req)
+        return collected
+
+    def make_requirement_from_candidate(
+        self, candidate: Candidate
+    ) -> ExplicitRequirement:
+        return ExplicitRequirement(candidate)
+
+    def make_requirement_from_spec(
+        self,
+        specifier: str,
+        comes_from: Optional[InstallRequirement],
+        requested_extras: Iterable[str] = (),
+    ) -> Optional[Requirement]:
+        ireq = self._make_install_req_from_spec(specifier, comes_from)
+        return self._make_requirement_from_install_req(ireq, requested_extras)
+
+    def make_requires_python_requirement(
+        self,
+        specifier: SpecifierSet,
+    ) -> Optional[Requirement]:
+        if self._ignore_requires_python:
+            return None
+        # Don't bother creating a dependency for an empty Requires-Python.
+        if not str(specifier):
+            return None
+        return RequiresPythonRequirement(specifier, self._python_candidate)
+
+    def get_wheel_cache_entry(
+        self, link: Link, name: Optional[str]
+    ) -> Optional[CacheEntry]:
+        """Look up the link in the wheel cache.
+
+        If ``preparer.require_hashes`` is True, don't use the wheel cache,
+        because cached wheels, always built locally, have different hashes
+        than the files downloaded from the index server and thus throw false
+        hash mismatches. Furthermore, cached wheels at present have
+        nondeterministic contents due to file modification times.
+        """
+        if self._wheel_cache is None or self.preparer.require_hashes:
+            return None
+        return self._wheel_cache.get_cache_entry(
+            link=link,
+            package_name=name,
+            supported_tags=get_supported(),
+        )
+
+    def get_dist_to_uninstall(self, candidate: Candidate) -> Optional[BaseDistribution]:
+        # TODO: Are there more cases this needs to return True? Editable?
+        dist = self._installed_dists.get(candidate.project_name)
+        if dist is None:  # Not installed, no uninstallation required.
+            return None
+
+        # We're installing into global site. The current installation must
+        # be uninstalled, no matter it's in global or user site, because the
+        # user site installation has precedence over global.
+        if not self._use_user_site:
+            return dist
+
+        # We're installing into user site. Remove the user site installation.
+        if dist.in_usersite:
+            return dist
+
+        # We're installing into user site, but the installed incompatible
+        # package is in global site. We can't uninstall that, and would let
+        # the new user installation to "shadow" it. But shadowing won't work
+        # in virtual environments, so we error out.
+        if running_under_virtualenv() and dist.in_site_packages:
+            message = (
+                f"Will not install to the user site because it will lack "
+                f"sys.path precedence to {dist.raw_name} in {dist.location}"
+            )
+            raise InstallationError(message)
+        return None
+
+    def _report_requires_python_error(
+        self, causes: Sequence["ConflictCause"]
+    ) -> UnsupportedPythonVersion:
+        assert causes, "Requires-Python error reported with no cause"
+
+        version = self._python_candidate.version
+
+        if len(causes) == 1:
+            specifier = str(causes[0].requirement.specifier)
+            message = (
+                f"Package {causes[0].parent.name!r} requires a different "
+                f"Python: {version} not in {specifier!r}"
+            )
+            return UnsupportedPythonVersion(message)
+
+        message = f"Packages require a different Python. {version} not in:"
+        for cause in causes:
+            package = cause.parent.format_for_error()
+            specifier = str(cause.requirement.specifier)
+            message += f"\n{specifier!r} (required by {package})"
+        return UnsupportedPythonVersion(message)
+
+    def _report_single_requirement_conflict(
+        self, req: Requirement, parent: Optional[Candidate]
+    ) -> DistributionNotFound:
+        if parent is None:
+            req_disp = str(req)
+        else:
+            req_disp = f"{req} (from {parent.name})"
+
+        cands = self._finder.find_all_candidates(req.project_name)
+        skipped_by_requires_python = self._finder.requires_python_skipped_reasons()
+        versions = [str(v) for v in sorted({c.version for c in cands})]
+
+        if skipped_by_requires_python:
+            logger.critical(
+                "Ignored the following versions that require a different python "
+                "version: %s",
+                "; ".join(skipped_by_requires_python) or "none",
+            )
+        logger.critical(
+            "Could not find a version that satisfies the requirement %s "
+            "(from versions: %s)",
+            req_disp,
+            ", ".join(versions) or "none",
+        )
+        if str(req) == "requirements.txt":
+            logger.info(
+                "HINT: You are attempting to install a package literally "
+                'named "requirements.txt" (which cannot exist). Consider '
+                "using the '-r' flag to install the packages listed in "
+                "requirements.txt"
+            )
+
+        return DistributionNotFound(f"No matching distribution found for {req}")
+
+    def get_installation_error(
+        self,
+        e: "ResolutionImpossible[Requirement, Candidate]",
+        constraints: Dict[str, Constraint],
+    ) -> InstallationError:
+
+        assert e.causes, "Installation error reported with no cause"
+
+        # If one of the things we can't solve is "we need Python X.Y",
+        # that is what we report.
+        requires_python_causes = [
+            cause
+            for cause in e.causes
+            if isinstance(cause.requirement, RequiresPythonRequirement)
+            and not cause.requirement.is_satisfied_by(self._python_candidate)
+        ]
+        if requires_python_causes:
+            # The comprehension above makes sure all Requirement instances are
+            # RequiresPythonRequirement, so let's cast for convenience.
+            return self._report_requires_python_error(
+                cast("Sequence[ConflictCause]", requires_python_causes),
+            )
+
+        # Otherwise, we have a set of causes which can't all be satisfied
+        # at once.
+
+        # The simplest case is when we have *one* cause that can't be
+        # satisfied. We just report that case.
+        if len(e.causes) == 1:
+            req, parent = e.causes[0]
+            if req.name not in constraints:
+                return self._report_single_requirement_conflict(req, parent)
+
+        # OK, we now have a list of requirements that can't all be
+        # satisfied at once.
+
+        # A couple of formatting helpers
+        def text_join(parts: List[str]) -> str:
+            if len(parts) == 1:
+                return parts[0]
+
+            return ", ".join(parts[:-1]) + " and " + parts[-1]
+
+        def describe_trigger(parent: Candidate) -> str:
+            ireq = parent.get_install_requirement()
+            if not ireq or not ireq.comes_from:
+                return f"{parent.name}=={parent.version}"
+            if isinstance(ireq.comes_from, InstallRequirement):
+                return str(ireq.comes_from.name)
+            return str(ireq.comes_from)
+
+        triggers = set()
+        for req, parent in e.causes:
+            if parent is None:
+                # This is a root requirement, so we can report it directly
+                trigger = req.format_for_error()
+            else:
+                trigger = describe_trigger(parent)
+            triggers.add(trigger)
+
+        if triggers:
+            info = text_join(sorted(triggers))
+        else:
+            info = "the requested packages"
+
+        msg = (
+            "Cannot install {} because these package versions "
+            "have conflicting dependencies.".format(info)
+        )
+        logger.critical(msg)
+        msg = "\nThe conflict is caused by:"
+
+        relevant_constraints = set()
+        for req, parent in e.causes:
+            if req.name in constraints:
+                relevant_constraints.add(req.name)
+            msg = msg + "\n    "
+            if parent:
+                msg = msg + f"{parent.name} {parent.version} depends on "
+            else:
+                msg = msg + "The user requested "
+            msg = msg + req.format_for_error()
+        for key in relevant_constraints:
+            spec = constraints[key].specifier
+            msg += f"\n    The user requested (constraint) {key}{spec}"
+
+        msg = (
+            msg
+            + "\n\n"
+            + "To fix this you could try to:\n"
+            + "1. loosen the range of package versions you've specified\n"
+            + "2. remove package versions to allow pip attempt to solve "
+            + "the dependency conflict\n"
+        )
+
+        logger.info(msg)
+
+        return DistributionNotFound(
+            "ResolutionImpossible: for help visit "
+            "https://pip.pypa.io/en/latest/topics/dependency-resolution/"
+            "#dealing-with-dependency-conflicts"
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py
new file mode 100644
index 0000000..8663097
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/found_candidates.py
@@ -0,0 +1,155 @@
+"""Utilities to lazily create and visit candidates found.
+
+Creating and visiting a candidate is a *very* costly operation. It involves
+fetching, extracting, potentially building modules from source, and verifying
+distribution metadata. It is therefore crucial for performance to keep
+everything here lazy all the way down, so we only touch candidates that we
+absolutely need, and not "download the world" when we only need one version of
+something.
+"""
+
+import functools
+from collections.abc import Sequence
+from typing import TYPE_CHECKING, Any, Callable, Iterator, Optional, Set, Tuple
+
+from pip._vendor.packaging.version import _BaseVersion
+
+from .base import Candidate
+
+IndexCandidateInfo = Tuple[_BaseVersion, Callable[[], Optional[Candidate]]]
+
+if TYPE_CHECKING:
+    SequenceCandidate = Sequence[Candidate]
+else:
+    # For compatibility: Python before 3.9 does not support using [] on the
+    # Sequence class.
+    #
+    # >>> from collections.abc import Sequence
+    # >>> Sequence[str]
+    # Traceback (most recent call last):
+    #   File "<stdin>", line 1, in <module>
+    # TypeError: 'ABCMeta' object is not subscriptable
+    #
+    # TODO: Remove this block after dropping Python 3.8 support.
+    SequenceCandidate = Sequence
+
+
+def _iter_built(infos: Iterator[IndexCandidateInfo]) -> Iterator[Candidate]:
+    """Iterator for ``FoundCandidates``.
+
+    This iterator is used when the package is not already installed. Candidates
+    from index come later in their normal ordering.
+    """
+    versions_found: Set[_BaseVersion] = set()
+    for version, func in infos:
+        if version in versions_found:
+            continue
+        candidate = func()
+        if candidate is None:
+            continue
+        yield candidate
+        versions_found.add(version)
+
+
+def _iter_built_with_prepended(
+    installed: Candidate, infos: Iterator[IndexCandidateInfo]
+) -> Iterator[Candidate]:
+    """Iterator for ``FoundCandidates``.
+
+    This iterator is used when the resolver prefers the already-installed
+    candidate and NOT to upgrade. The installed candidate is therefore
+    always yielded first, and candidates from index come later in their
+    normal ordering, except skipped when the version is already installed.
+    """
+    yield installed
+    versions_found: Set[_BaseVersion] = {installed.version}
+    for version, func in infos:
+        if version in versions_found:
+            continue
+        candidate = func()
+        if candidate is None:
+            continue
+        yield candidate
+        versions_found.add(version)
+
+
+def _iter_built_with_inserted(
+    installed: Candidate, infos: Iterator[IndexCandidateInfo]
+) -> Iterator[Candidate]:
+    """Iterator for ``FoundCandidates``.
+
+    This iterator is used when the resolver prefers to upgrade an
+    already-installed package. Candidates from index are returned in their
+    normal ordering, except replaced when the version is already installed.
+
+    The implementation iterates through and yields other candidates, inserting
+    the installed candidate exactly once before we start yielding older or
+    equivalent candidates, or after all other candidates if they are all newer.
+    """
+    versions_found: Set[_BaseVersion] = set()
+    for version, func in infos:
+        if version in versions_found:
+            continue
+        # If the installed candidate is better, yield it first.
+        if installed.version >= version:
+            yield installed
+            versions_found.add(installed.version)
+        candidate = func()
+        if candidate is None:
+            continue
+        yield candidate
+        versions_found.add(version)
+
+    # If the installed candidate is older than all other candidates.
+    if installed.version not in versions_found:
+        yield installed
+
+
+class FoundCandidates(SequenceCandidate):
+    """A lazy sequence to provide candidates to the resolver.
+
+    The intended usage is to return this from `find_matches()` so the resolver
+    can iterate through the sequence multiple times, but only access the index
+    page when remote packages are actually needed. This improve performances
+    when suitable candidates are already installed on disk.
+    """
+
+    def __init__(
+        self,
+        get_infos: Callable[[], Iterator[IndexCandidateInfo]],
+        installed: Optional[Candidate],
+        prefers_installed: bool,
+        incompatible_ids: Set[int],
+    ):
+        self._get_infos = get_infos
+        self._installed = installed
+        self._prefers_installed = prefers_installed
+        self._incompatible_ids = incompatible_ids
+
+    def __getitem__(self, index: Any) -> Any:
+        # Implemented to satisfy the ABC check. This is not needed by the
+        # resolver, and should not be used by the provider either (for
+        # performance reasons).
+        raise NotImplementedError("don't do this")
+
+    def __iter__(self) -> Iterator[Candidate]:
+        infos = self._get_infos()
+        if not self._installed:
+            iterator = _iter_built(infos)
+        elif self._prefers_installed:
+            iterator = _iter_built_with_prepended(self._installed, infos)
+        else:
+            iterator = _iter_built_with_inserted(self._installed, infos)
+        return (c for c in iterator if id(c) not in self._incompatible_ids)
+
+    def __len__(self) -> int:
+        # Implemented to satisfy the ABC check. This is not needed by the
+        # resolver, and should not be used by the provider either (for
+        # performance reasons).
+        raise NotImplementedError("don't do this")
+
+    @functools.lru_cache(maxsize=1)
+    def __bool__(self) -> bool:
+        if self._prefers_installed and self._installed:
+            return True
+        return any(self)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/provider.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/provider.py
new file mode 100644
index 0000000..6300dfc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/provider.py
@@ -0,0 +1,248 @@
+import collections
+import math
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    Iterable,
+    Iterator,
+    Mapping,
+    Sequence,
+    TypeVar,
+    Union,
+)
+
+from pip._vendor.resolvelib.providers import AbstractProvider
+
+from .base import Candidate, Constraint, Requirement
+from .candidates import REQUIRES_PYTHON_IDENTIFIER
+from .factory import Factory
+
+if TYPE_CHECKING:
+    from pip._vendor.resolvelib.providers import Preference
+    from pip._vendor.resolvelib.resolvers import RequirementInformation
+
+    PreferenceInformation = RequirementInformation[Requirement, Candidate]
+
+    _ProviderBase = AbstractProvider[Requirement, Candidate, str]
+else:
+    _ProviderBase = AbstractProvider
+
+# Notes on the relationship between the provider, the factory, and the
+# candidate and requirement classes.
+#
+# The provider is a direct implementation of the resolvelib class. Its role
+# is to deliver the API that resolvelib expects.
+#
+# Rather than work with completely abstract "requirement" and "candidate"
+# concepts as resolvelib does, pip has concrete classes implementing these two
+# ideas. The API of Requirement and Candidate objects are defined in the base
+# classes, but essentially map fairly directly to the equivalent provider
+# methods. In particular, `find_matches` and `is_satisfied_by` are
+# requirement methods, and `get_dependencies` is a candidate method.
+#
+# The factory is the interface to pip's internal mechanisms. It is stateless,
+# and is created by the resolver and held as a property of the provider. It is
+# responsible for creating Requirement and Candidate objects, and provides
+# services to those objects (access to pip's finder and preparer).
+
+
+D = TypeVar("D")
+V = TypeVar("V")
+
+
+def _get_with_identifier(
+    mapping: Mapping[str, V],
+    identifier: str,
+    default: D,
+) -> Union[D, V]:
+    """Get item from a package name lookup mapping with a resolver identifier.
+
+    This extra logic is needed when the target mapping is keyed by package
+    name, which cannot be directly looked up with an identifier (which may
+    contain requested extras). Additional logic is added to also look up a value
+    by "cleaning up" the extras from the identifier.
+    """
+    if identifier in mapping:
+        return mapping[identifier]
+    # HACK: Theoretically we should check whether this identifier is a valid
+    # "NAME[EXTRAS]" format, and parse out the name part with packaging or
+    # some regular expression. But since pip's resolver only spits out three
+    # kinds of identifiers: normalized PEP 503 names, normalized names plus
+    # extras, and Requires-Python, we can cheat a bit here.
+    name, open_bracket, _ = identifier.partition("[")
+    if open_bracket and name in mapping:
+        return mapping[name]
+    return default
+
+
+class PipProvider(_ProviderBase):
+    """Pip's provider implementation for resolvelib.
+
+    :params constraints: A mapping of constraints specified by the user. Keys
+        are canonicalized project names.
+    :params ignore_dependencies: Whether the user specified ``--no-deps``.
+    :params upgrade_strategy: The user-specified upgrade strategy.
+    :params user_requested: A set of canonicalized package names that the user
+        supplied for pip to install/upgrade.
+    """
+
+    def __init__(
+        self,
+        factory: Factory,
+        constraints: Dict[str, Constraint],
+        ignore_dependencies: bool,
+        upgrade_strategy: str,
+        user_requested: Dict[str, int],
+    ) -> None:
+        self._factory = factory
+        self._constraints = constraints
+        self._ignore_dependencies = ignore_dependencies
+        self._upgrade_strategy = upgrade_strategy
+        self._user_requested = user_requested
+        self._known_depths: Dict[str, float] = collections.defaultdict(lambda: math.inf)
+
+    def identify(self, requirement_or_candidate: Union[Requirement, Candidate]) -> str:
+        return requirement_or_candidate.name
+
+    def get_preference(  # type: ignore
+        self,
+        identifier: str,
+        resolutions: Mapping[str, Candidate],
+        candidates: Mapping[str, Iterator[Candidate]],
+        information: Mapping[str, Iterable["PreferenceInformation"]],
+        backtrack_causes: Sequence["PreferenceInformation"],
+    ) -> "Preference":
+        """Produce a sort key for given requirement based on preference.
+
+        The lower the return value is, the more preferred this group of
+        arguments is.
+
+        Currently pip considers the following in order:
+
+        * Prefer if any of the known requirements is "direct", e.g. points to an
+          explicit URL.
+        * If equal, prefer if any requirement is "pinned", i.e. contains
+          operator ``===`` or ``==``.
+        * If equal, calculate an approximate "depth" and resolve requirements
+          closer to the user-specified requirements first.
+        * Order user-specified requirements by the order they are specified.
+        * If equal, prefers "non-free" requirements, i.e. contains at least one
+          operator, such as ``>=`` or ``<``.
+        * If equal, order alphabetically for consistency (helps debuggability).
+        """
+        lookups = (r.get_candidate_lookup() for r, _ in information[identifier])
+        candidate, ireqs = zip(*lookups)
+        operators = [
+            specifier.operator
+            for specifier_set in (ireq.specifier for ireq in ireqs if ireq)
+            for specifier in specifier_set
+        ]
+
+        direct = candidate is not None
+        pinned = any(op[:2] == "==" for op in operators)
+        unfree = bool(operators)
+
+        try:
+            requested_order: Union[int, float] = self._user_requested[identifier]
+        except KeyError:
+            requested_order = math.inf
+            parent_depths = (
+                self._known_depths[parent.name] if parent is not None else 0.0
+                for _, parent in information[identifier]
+            )
+            inferred_depth = min(d for d in parent_depths) + 1.0
+        else:
+            inferred_depth = 1.0
+        self._known_depths[identifier] = inferred_depth
+
+        requested_order = self._user_requested.get(identifier, math.inf)
+
+        # Requires-Python has only one candidate and the check is basically
+        # free, so we always do it first to avoid needless work if it fails.
+        requires_python = identifier == REQUIRES_PYTHON_IDENTIFIER
+
+        # HACK: Setuptools have a very long and solid backward compatibility
+        # track record, and extremely few projects would request a narrow,
+        # non-recent version range of it since that would break a lot things.
+        # (Most projects specify it only to request for an installer feature,
+        # which does not work, but that's another topic.) Intentionally
+        # delaying Setuptools helps reduce branches the resolver has to check.
+        # This serves as a temporary fix for issues like "apache-airflow[all]"
+        # while we work on "proper" branch pruning techniques.
+        delay_this = identifier == "setuptools"
+
+        # Prefer the causes of backtracking on the assumption that the problem
+        # resolving the dependency tree is related to the failures that caused
+        # the backtracking
+        backtrack_cause = self.is_backtrack_cause(identifier, backtrack_causes)
+
+        return (
+            not requires_python,
+            delay_this,
+            not direct,
+            not pinned,
+            not backtrack_cause,
+            inferred_depth,
+            requested_order,
+            not unfree,
+            identifier,
+        )
+
+    def find_matches(
+        self,
+        identifier: str,
+        requirements: Mapping[str, Iterator[Requirement]],
+        incompatibilities: Mapping[str, Iterator[Candidate]],
+    ) -> Iterable[Candidate]:
+        def _eligible_for_upgrade(identifier: str) -> bool:
+            """Are upgrades allowed for this project?
+
+            This checks the upgrade strategy, and whether the project was one
+            that the user specified in the command line, in order to decide
+            whether we should upgrade if there's a newer version available.
+
+            (Note that we don't need access to the `--upgrade` flag, because
+            an upgrade strategy of "to-satisfy-only" means that `--upgrade`
+            was not specified).
+            """
+            if self._upgrade_strategy == "eager":
+                return True
+            elif self._upgrade_strategy == "only-if-needed":
+                user_order = _get_with_identifier(
+                    self._user_requested,
+                    identifier,
+                    default=None,
+                )
+                return user_order is not None
+            return False
+
+        constraint = _get_with_identifier(
+            self._constraints,
+            identifier,
+            default=Constraint.empty(),
+        )
+        return self._factory.find_candidates(
+            identifier=identifier,
+            requirements=requirements,
+            constraint=constraint,
+            prefers_installed=(not _eligible_for_upgrade(identifier)),
+            incompatibilities=incompatibilities,
+        )
+
+    def is_satisfied_by(self, requirement: Requirement, candidate: Candidate) -> bool:
+        return requirement.is_satisfied_by(candidate)
+
+    def get_dependencies(self, candidate: Candidate) -> Sequence[Requirement]:
+        with_requires = not self._ignore_dependencies
+        return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
+
+    @staticmethod
+    def is_backtrack_cause(
+        identifier: str, backtrack_causes: Sequence["PreferenceInformation"]
+    ) -> bool:
+        for backtrack_cause in backtrack_causes:
+            if identifier == backtrack_cause.requirement.name:
+                return True
+            if backtrack_cause.parent and identifier == backtrack_cause.parent.name:
+                return True
+        return False
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/reporter.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/reporter.py
new file mode 100644
index 0000000..6ced532
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/reporter.py
@@ -0,0 +1,68 @@
+from collections import defaultdict
+from logging import getLogger
+from typing import Any, DefaultDict
+
+from pip._vendor.resolvelib.reporters import BaseReporter
+
+from .base import Candidate, Requirement
+
+logger = getLogger(__name__)
+
+
+class PipReporter(BaseReporter):
+    def __init__(self) -> None:
+        self.backtracks_by_package: DefaultDict[str, int] = defaultdict(int)
+
+        self._messages_at_backtrack = {
+            1: (
+                "pip is looking at multiple versions of {package_name} to "
+                "determine which version is compatible with other "
+                "requirements. This could take a while."
+            ),
+            8: (
+                "pip is looking at multiple versions of {package_name} to "
+                "determine which version is compatible with other "
+                "requirements. This could take a while."
+            ),
+            13: (
+                "This is taking longer than usual. You might need to provide "
+                "the dependency resolver with stricter constraints to reduce "
+                "runtime. See https://pip.pypa.io/warnings/backtracking for "
+                "guidance. If you want to abort this run, press Ctrl + C."
+            ),
+        }
+
+    def backtracking(self, candidate: Candidate) -> None:
+        self.backtracks_by_package[candidate.name] += 1
+
+        count = self.backtracks_by_package[candidate.name]
+        if count not in self._messages_at_backtrack:
+            return
+
+        message = self._messages_at_backtrack[count]
+        logger.info("INFO: %s", message.format(package_name=candidate.name))
+
+
+class PipDebuggingReporter(BaseReporter):
+    """A reporter that does an info log for every event it sees."""
+
+    def starting(self) -> None:
+        logger.info("Reporter.starting()")
+
+    def starting_round(self, index: int) -> None:
+        logger.info("Reporter.starting_round(%r)", index)
+
+    def ending_round(self, index: int, state: Any) -> None:
+        logger.info("Reporter.ending_round(%r, state)", index)
+
+    def ending(self, state: Any) -> None:
+        logger.info("Reporter.ending(%r)", state)
+
+    def adding_requirement(self, requirement: Requirement, parent: Candidate) -> None:
+        logger.info("Reporter.adding_requirement(%r, %r)", requirement, parent)
+
+    def backtracking(self, candidate: Candidate) -> None:
+        logger.info("Reporter.backtracking(%r)", candidate)
+
+    def pinning(self, candidate: Candidate) -> None:
+        logger.info("Reporter.pinning(%r)", candidate)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/requirements.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/requirements.py
new file mode 100644
index 0000000..f561f1f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/requirements.py
@@ -0,0 +1,166 @@
+from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.utils import NormalizedName, canonicalize_name
+
+from pip._internal.req.req_install import InstallRequirement
+
+from .base import Candidate, CandidateLookup, Requirement, format_name
+
+
+class ExplicitRequirement(Requirement):
+    def __init__(self, candidate: Candidate) -> None:
+        self.candidate = candidate
+
+    def __str__(self) -> str:
+        return str(self.candidate)
+
+    def __repr__(self) -> str:
+        return "{class_name}({candidate!r})".format(
+            class_name=self.__class__.__name__,
+            candidate=self.candidate,
+        )
+
+    @property
+    def project_name(self) -> NormalizedName:
+        # No need to canonicalize - the candidate did this
+        return self.candidate.project_name
+
+    @property
+    def name(self) -> str:
+        # No need to canonicalize - the candidate did this
+        return self.candidate.name
+
+    def format_for_error(self) -> str:
+        return self.candidate.format_for_error()
+
+    def get_candidate_lookup(self) -> CandidateLookup:
+        return self.candidate, None
+
+    def is_satisfied_by(self, candidate: Candidate) -> bool:
+        return candidate == self.candidate
+
+
+class SpecifierRequirement(Requirement):
+    def __init__(self, ireq: InstallRequirement) -> None:
+        assert ireq.link is None, "This is a link, not a specifier"
+        self._ireq = ireq
+        self._extras = frozenset(ireq.extras)
+
+    def __str__(self) -> str:
+        return str(self._ireq.req)
+
+    def __repr__(self) -> str:
+        return "{class_name}({requirement!r})".format(
+            class_name=self.__class__.__name__,
+            requirement=str(self._ireq.req),
+        )
+
+    @property
+    def project_name(self) -> NormalizedName:
+        assert self._ireq.req, "Specifier-backed ireq is always PEP 508"
+        return canonicalize_name(self._ireq.req.name)
+
+    @property
+    def name(self) -> str:
+        return format_name(self.project_name, self._extras)
+
+    def format_for_error(self) -> str:
+
+        # Convert comma-separated specifiers into "A, B, ..., F and G"
+        # This makes the specifier a bit more "human readable", without
+        # risking a change in meaning. (Hopefully! Not all edge cases have
+        # been checked)
+        parts = [s.strip() for s in str(self).split(",")]
+        if len(parts) == 0:
+            return ""
+        elif len(parts) == 1:
+            return parts[0]
+
+        return ", ".join(parts[:-1]) + " and " + parts[-1]
+
+    def get_candidate_lookup(self) -> CandidateLookup:
+        return None, self._ireq
+
+    def is_satisfied_by(self, candidate: Candidate) -> bool:
+        assert candidate.name == self.name, (
+            f"Internal issue: Candidate is not for this requirement "
+            f"{candidate.name} vs {self.name}"
+        )
+        # We can safely always allow prereleases here since PackageFinder
+        # already implements the prerelease logic, and would have filtered out
+        # prerelease candidates if the user does not expect them.
+        assert self._ireq.req, "Specifier-backed ireq is always PEP 508"
+        spec = self._ireq.req.specifier
+        return spec.contains(candidate.version, prereleases=True)
+
+
+class RequiresPythonRequirement(Requirement):
+    """A requirement representing Requires-Python metadata."""
+
+    def __init__(self, specifier: SpecifierSet, match: Candidate) -> None:
+        self.specifier = specifier
+        self._candidate = match
+
+    def __str__(self) -> str:
+        return f"Python {self.specifier}"
+
+    def __repr__(self) -> str:
+        return "{class_name}({specifier!r})".format(
+            class_name=self.__class__.__name__,
+            specifier=str(self.specifier),
+        )
+
+    @property
+    def project_name(self) -> NormalizedName:
+        return self._candidate.project_name
+
+    @property
+    def name(self) -> str:
+        return self._candidate.name
+
+    def format_for_error(self) -> str:
+        return str(self)
+
+    def get_candidate_lookup(self) -> CandidateLookup:
+        if self.specifier.contains(self._candidate.version, prereleases=True):
+            return self._candidate, None
+        return None, None
+
+    def is_satisfied_by(self, candidate: Candidate) -> bool:
+        assert candidate.name == self._candidate.name, "Not Python candidate"
+        # We can safely always allow prereleases here since PackageFinder
+        # already implements the prerelease logic, and would have filtered out
+        # prerelease candidates if the user does not expect them.
+        return self.specifier.contains(candidate.version, prereleases=True)
+
+
+class UnsatisfiableRequirement(Requirement):
+    """A requirement that cannot be satisfied."""
+
+    def __init__(self, name: NormalizedName) -> None:
+        self._name = name
+
+    def __str__(self) -> str:
+        return f"{self._name} (unavailable)"
+
+    def __repr__(self) -> str:
+        return "{class_name}({name!r})".format(
+            class_name=self.__class__.__name__,
+            name=str(self._name),
+        )
+
+    @property
+    def project_name(self) -> NormalizedName:
+        return self._name
+
+    @property
+    def name(self) -> str:
+        return self._name
+
+    def format_for_error(self) -> str:
+        return str(self)
+
+    def get_candidate_lookup(self) -> CandidateLookup:
+        return None, None
+
+    def is_satisfied_by(self, candidate: Candidate) -> bool:
+        return False
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/resolver.py b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/resolver.py
new file mode 100644
index 0000000..a605d6c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/resolution/resolvelib/resolver.py
@@ -0,0 +1,296 @@
+import functools
+import logging
+import os
+from typing import TYPE_CHECKING, Dict, List, Optional, Set, Tuple, cast
+
+from pip._vendor.packaging.utils import canonicalize_name
+from pip._vendor.resolvelib import BaseReporter, ResolutionImpossible
+from pip._vendor.resolvelib import Resolver as RLResolver
+from pip._vendor.resolvelib.structs import DirectedGraph
+
+from pip._internal.cache import WheelCache
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.operations.prepare import RequirementPreparer
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.req.req_set import RequirementSet
+from pip._internal.resolution.base import BaseResolver, InstallRequirementProvider
+from pip._internal.resolution.resolvelib.provider import PipProvider
+from pip._internal.resolution.resolvelib.reporter import (
+    PipDebuggingReporter,
+    PipReporter,
+)
+
+from .base import Candidate, Requirement
+from .factory import Factory
+
+if TYPE_CHECKING:
+    from pip._vendor.resolvelib.resolvers import Result as RLResult
+
+    Result = RLResult[Requirement, Candidate, str]
+
+
+logger = logging.getLogger(__name__)
+
+
+class Resolver(BaseResolver):
+    _allowed_strategies = {"eager", "only-if-needed", "to-satisfy-only"}
+
+    def __init__(
+        self,
+        preparer: RequirementPreparer,
+        finder: PackageFinder,
+        wheel_cache: Optional[WheelCache],
+        make_install_req: InstallRequirementProvider,
+        use_user_site: bool,
+        ignore_dependencies: bool,
+        ignore_installed: bool,
+        ignore_requires_python: bool,
+        force_reinstall: bool,
+        upgrade_strategy: str,
+        py_version_info: Optional[Tuple[int, ...]] = None,
+    ):
+        super().__init__()
+        assert upgrade_strategy in self._allowed_strategies
+
+        self.factory = Factory(
+            finder=finder,
+            preparer=preparer,
+            make_install_req=make_install_req,
+            wheel_cache=wheel_cache,
+            use_user_site=use_user_site,
+            force_reinstall=force_reinstall,
+            ignore_installed=ignore_installed,
+            ignore_requires_python=ignore_requires_python,
+            py_version_info=py_version_info,
+        )
+        self.ignore_dependencies = ignore_dependencies
+        self.upgrade_strategy = upgrade_strategy
+        self._result: Optional[Result] = None
+
+    def resolve(
+        self, root_reqs: List[InstallRequirement], check_supported_wheels: bool
+    ) -> RequirementSet:
+        collected = self.factory.collect_root_requirements(root_reqs)
+        provider = PipProvider(
+            factory=self.factory,
+            constraints=collected.constraints,
+            ignore_dependencies=self.ignore_dependencies,
+            upgrade_strategy=self.upgrade_strategy,
+            user_requested=collected.user_requested,
+        )
+        if "PIP_RESOLVER_DEBUG" in os.environ:
+            reporter: BaseReporter = PipDebuggingReporter()
+        else:
+            reporter = PipReporter()
+        resolver: RLResolver[Requirement, Candidate, str] = RLResolver(
+            provider,
+            reporter,
+        )
+
+        try:
+            try_to_avoid_resolution_too_deep = 2000000
+            result = self._result = resolver.resolve(
+                collected.requirements, max_rounds=try_to_avoid_resolution_too_deep
+            )
+
+        except ResolutionImpossible as e:
+            error = self.factory.get_installation_error(
+                cast("ResolutionImpossible[Requirement, Candidate]", e),
+                collected.constraints,
+            )
+            raise error from e
+
+        req_set = RequirementSet(check_supported_wheels=check_supported_wheels)
+        for candidate in result.mapping.values():
+            ireq = candidate.get_install_requirement()
+            if ireq is None:
+                continue
+
+            # Check if there is already an installation under the same name,
+            # and set a flag for later stages to uninstall it, if needed.
+            installed_dist = self.factory.get_dist_to_uninstall(candidate)
+            if installed_dist is None:
+                # There is no existing installation -- nothing to uninstall.
+                ireq.should_reinstall = False
+            elif self.factory.force_reinstall:
+                # The --force-reinstall flag is set -- reinstall.
+                ireq.should_reinstall = True
+            elif installed_dist.version != candidate.version:
+                # The installation is different in version -- reinstall.
+                ireq.should_reinstall = True
+            elif candidate.is_editable or installed_dist.editable:
+                # The incoming distribution is editable, or different in
+                # editable-ness to installation -- reinstall.
+                ireq.should_reinstall = True
+            elif candidate.source_link and candidate.source_link.is_file:
+                # The incoming distribution is under file://
+                if candidate.source_link.is_wheel:
+                    # is a local wheel -- do nothing.
+                    logger.info(
+                        "%s is already installed with the same version as the "
+                        "provided wheel. Use --force-reinstall to force an "
+                        "installation of the wheel.",
+                        ireq.name,
+                    )
+                    continue
+
+                # is a local sdist or path -- reinstall
+                ireq.should_reinstall = True
+            else:
+                continue
+
+            link = candidate.source_link
+            if link and link.is_yanked:
+                # The reason can contain non-ASCII characters, Unicode
+                # is required for Python 2.
+                msg = (
+                    "The candidate selected for download or install is a "
+                    "yanked version: {name!r} candidate (version {version} "
+                    "at {link})\nReason for being yanked: {reason}"
+                ).format(
+                    name=candidate.name,
+                    version=candidate.version,
+                    link=link,
+                    reason=link.yanked_reason or "<none given>",
+                )
+                logger.warning(msg)
+
+            req_set.add_named_requirement(ireq)
+
+        reqs = req_set.all_requirements
+        self.factory.preparer.prepare_linked_requirements_more(reqs)
+        return req_set
+
+    def get_installation_order(
+        self, req_set: RequirementSet
+    ) -> List[InstallRequirement]:
+        """Get order for installation of requirements in RequirementSet.
+
+        The returned list contains a requirement before another that depends on
+        it. This helps ensure that the environment is kept consistent as they
+        get installed one-by-one.
+
+        The current implementation creates a topological ordering of the
+        dependency graph, giving more weight to packages with less
+        or no dependencies, while breaking any cycles in the graph at
+        arbitrary points. We make no guarantees about where the cycle
+        would be broken, other than it *would* be broken.
+        """
+        assert self._result is not None, "must call resolve() first"
+
+        if not req_set.requirements:
+            # Nothing is left to install, so we do not need an order.
+            return []
+
+        graph = self._result.graph
+        weights = get_topological_weights(graph, set(req_set.requirements.keys()))
+
+        sorted_items = sorted(
+            req_set.requirements.items(),
+            key=functools.partial(_req_set_item_sorter, weights=weights),
+            reverse=True,
+        )
+        return [ireq for _, ireq in sorted_items]
+
+
+def get_topological_weights(
+    graph: "DirectedGraph[Optional[str]]", requirement_keys: Set[str]
+) -> Dict[Optional[str], int]:
+    """Assign weights to each node based on how "deep" they are.
+
+    This implementation may change at any point in the future without prior
+    notice.
+
+    We first simplify the dependency graph by pruning any leaves and giving them
+    the highest weight: a package without any dependencies should be installed
+    first. This is done again and again in the same way, giving ever less weight
+    to the newly found leaves. The loop stops when no leaves are left: all
+    remaining packages have at least one dependency left in the graph.
+
+    Then we continue with the remaining graph, by taking the length for the
+    longest path to any node from root, ignoring any paths that contain a single
+    node twice (i.e. cycles). This is done through a depth-first search through
+    the graph, while keeping track of the path to the node.
+
+    Cycles in the graph result would result in node being revisited while also
+    being on its own path. In this case, take no action. This helps ensure we
+    don't get stuck in a cycle.
+
+    When assigning weight, the longer path (i.e. larger length) is preferred.
+
+    We are only interested in the weights of packages that are in the
+    requirement_keys.
+    """
+    path: Set[Optional[str]] = set()
+    weights: Dict[Optional[str], int] = {}
+
+    def visit(node: Optional[str]) -> None:
+        if node in path:
+            # We hit a cycle, so we'll break it here.
+            return
+
+        # Time to visit the children!
+        path.add(node)
+        for child in graph.iter_children(node):
+            visit(child)
+        path.remove(node)
+
+        if node not in requirement_keys:
+            return
+
+        last_known_parent_count = weights.get(node, 0)
+        weights[node] = max(last_known_parent_count, len(path))
+
+    # Simplify the graph, pruning leaves that have no dependencies.
+    # This is needed for large graphs (say over 200 packages) because the
+    # `visit` function is exponentially slower then, taking minutes.
+    # See https://github.com/pypa/pip/issues/10557
+    # We will loop until we explicitly break the loop.
+    while True:
+        leaves = set()
+        for key in graph:
+            if key is None:
+                continue
+            for _child in graph.iter_children(key):
+                # This means we have at least one child
+                break
+            else:
+                # No child.
+                leaves.add(key)
+        if not leaves:
+            # We are done simplifying.
+            break
+        # Calculate the weight for the leaves.
+        weight = len(graph) - 1
+        for leaf in leaves:
+            if leaf not in requirement_keys:
+                continue
+            weights[leaf] = weight
+        # Remove the leaves from the graph, making it simpler.
+        for leaf in leaves:
+            graph.remove(leaf)
+
+    # Visit the remaining graph.
+    # `None` is guaranteed to be the root node by resolvelib.
+    visit(None)
+
+    # Sanity check: all requirement keys should be in the weights,
+    # and no other keys should be in the weights.
+    difference = set(weights.keys()).difference(requirement_keys)
+    assert not difference, difference
+
+    return weights
+
+
+def _req_set_item_sorter(
+    item: Tuple[str, InstallRequirement],
+    weights: Dict[Optional[str], int],
+) -> Tuple[int, str]:
+    """Key function used to sort install requirements for installation.
+
+    Based on the "weight" mapping calculated in ``get_installation_order()``.
+    The canonical package name is returned as the second member as a tie-
+    breaker to ensure the result is predictable, which is useful in tests.
+    """
+    name = canonicalize_name(item[0])
+    return weights[name], name
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/self_outdated_check.py b/venv/lib/python3.9/site-packages/pip/_internal/self_outdated_check.py
new file mode 100644
index 0000000..9e2149c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/self_outdated_check.py
@@ -0,0 +1,239 @@
+import datetime
+import functools
+import hashlib
+import json
+import logging
+import optparse
+import os.path
+import sys
+from dataclasses import dataclass
+from typing import Any, Callable, Dict, Optional
+
+from pip._vendor.packaging.version import parse as parse_version
+from pip._vendor.rich.console import Group
+from pip._vendor.rich.markup import escape
+from pip._vendor.rich.text import Text
+
+from pip._internal.index.collector import LinkCollector
+from pip._internal.index.package_finder import PackageFinder
+from pip._internal.metadata import get_default_environment
+from pip._internal.metadata.base import DistributionVersion
+from pip._internal.models.selection_prefs import SelectionPreferences
+from pip._internal.network.session import PipSession
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.entrypoints import (
+    get_best_invocation_for_this_pip,
+    get_best_invocation_for_this_python,
+)
+from pip._internal.utils.filesystem import adjacent_tmp_file, check_path_owner, replace
+from pip._internal.utils.misc import ensure_dir
+
+_DATE_FMT = "%Y-%m-%dT%H:%M:%SZ"
+
+
+logger = logging.getLogger(__name__)
+
+
+def _get_statefile_name(key: str) -> str:
+    key_bytes = key.encode()
+    name = hashlib.sha224(key_bytes).hexdigest()
+    return name
+
+
+class SelfCheckState:
+    def __init__(self, cache_dir: str) -> None:
+        self._state: Dict[str, Any] = {}
+        self._statefile_path = None
+
+        # Try to load the existing state
+        if cache_dir:
+            self._statefile_path = os.path.join(
+                cache_dir, "selfcheck", _get_statefile_name(self.key)
+            )
+            try:
+                with open(self._statefile_path, encoding="utf-8") as statefile:
+                    self._state = json.load(statefile)
+            except (OSError, ValueError, KeyError):
+                # Explicitly suppressing exceptions, since we don't want to
+                # error out if the cache file is invalid.
+                pass
+
+    @property
+    def key(self) -> str:
+        return sys.prefix
+
+    def get(self, current_time: datetime.datetime) -> Optional[str]:
+        """Check if we have a not-outdated version loaded already."""
+        if not self._state:
+            return None
+
+        if "last_check" not in self._state:
+            return None
+
+        if "pypi_version" not in self._state:
+            return None
+
+        seven_days_in_seconds = 7 * 24 * 60 * 60
+
+        # Determine if we need to refresh the state
+        last_check = datetime.datetime.strptime(self._state["last_check"], _DATE_FMT)
+        seconds_since_last_check = (current_time - last_check).total_seconds()
+        if seconds_since_last_check > seven_days_in_seconds:
+            return None
+
+        return self._state["pypi_version"]
+
+    def set(self, pypi_version: str, current_time: datetime.datetime) -> None:
+        # If we do not have a path to cache in, don't bother saving.
+        if not self._statefile_path:
+            return
+
+        # Check to make sure that we own the directory
+        if not check_path_owner(os.path.dirname(self._statefile_path)):
+            return
+
+        # Now that we've ensured the directory is owned by this user, we'll go
+        # ahead and make sure that all our directories are created.
+        ensure_dir(os.path.dirname(self._statefile_path))
+
+        state = {
+            # Include the key so it's easy to tell which pip wrote the
+            # file.
+            "key": self.key,
+            "last_check": current_time.strftime(_DATE_FMT),
+            "pypi_version": pypi_version,
+        }
+
+        text = json.dumps(state, sort_keys=True, separators=(",", ":"))
+
+        with adjacent_tmp_file(self._statefile_path) as f:
+            f.write(text.encode())
+
+        try:
+            # Since we have a prefix-specific state file, we can just
+            # overwrite whatever is there, no need to check.
+            replace(f.name, self._statefile_path)
+        except OSError:
+            # Best effort.
+            pass
+
+
+@dataclass
+class UpgradePrompt:
+    old: str
+    new: str
+
+    def __rich__(self) -> Group:
+        if WINDOWS:
+            pip_cmd = f"{get_best_invocation_for_this_python()} -m pip"
+        else:
+            pip_cmd = get_best_invocation_for_this_pip()
+
+        notice = "[bold][[reset][blue]notice[reset][bold]][reset]"
+        return Group(
+            Text(),
+            Text.from_markup(
+                f"{notice} A new release of pip available: "
+                f"[red]{self.old}[reset] -> [green]{self.new}[reset]"
+            ),
+            Text.from_markup(
+                f"{notice} To update, run: "
+                f"[green]{escape(pip_cmd)} install --upgrade pip"
+            ),
+        )
+
+
+def was_installed_by_pip(pkg: str) -> bool:
+    """Checks whether pkg was installed by pip
+
+    This is used not to display the upgrade message when pip is in fact
+    installed by system package manager, such as dnf on Fedora.
+    """
+    dist = get_default_environment().get_distribution(pkg)
+    return dist is not None and "pip" == dist.installer
+
+
+def _get_current_remote_pip_version(
+    session: PipSession, options: optparse.Values
+) -> str:
+    # Lets use PackageFinder to see what the latest pip version is
+    link_collector = LinkCollector.create(
+        session,
+        options=options,
+        suppress_no_index=True,
+    )
+
+    # Pass allow_yanked=False so we don't suggest upgrading to a
+    # yanked version.
+    selection_prefs = SelectionPreferences(
+        allow_yanked=False,
+        allow_all_prereleases=False,  # Explicitly set to False
+    )
+
+    finder = PackageFinder.create(
+        link_collector=link_collector,
+        selection_prefs=selection_prefs,
+    )
+    best_candidate = finder.find_best_candidate("pip").best_candidate
+    if best_candidate is None:
+        return
+
+    return str(best_candidate.version)
+
+
+def _self_version_check_logic(
+    *,
+    state: SelfCheckState,
+    current_time: datetime.datetime,
+    local_version: DistributionVersion,
+    get_remote_version: Callable[[], str],
+) -> Optional[UpgradePrompt]:
+    remote_version_str = state.get(current_time)
+    if remote_version_str is None:
+        remote_version_str = get_remote_version()
+        state.set(remote_version_str, current_time)
+
+    remote_version = parse_version(remote_version_str)
+    logger.debug("Remote version of pip: %s", remote_version)
+    logger.debug("Local version of pip:  %s", local_version)
+
+    pip_installed_by_pip = was_installed_by_pip("pip")
+    logger.debug("Was pip installed by pip? %s", pip_installed_by_pip)
+    if not pip_installed_by_pip:
+        return None  # Only suggest upgrade if pip is installed by pip.
+
+    local_version_is_older = (
+        local_version < remote_version
+        and local_version.base_version != remote_version.base_version
+    )
+    if local_version_is_older:
+        return UpgradePrompt(old=str(local_version), new=remote_version_str)
+
+    return None
+
+
+def pip_self_version_check(session: PipSession, options: optparse.Values) -> None:
+    """Check for an update for pip.
+
+    Limit the frequency of checks to once per week. State is stored either in
+    the active virtualenv or in the user's USER_CACHE_DIR keyed off the prefix
+    of the pip script path.
+    """
+    installed_dist = get_default_environment().get_distribution("pip")
+    if not installed_dist:
+        return
+
+    try:
+        upgrade_prompt = _self_version_check_logic(
+            state=SelfCheckState(cache_dir=options.cache_dir),
+            current_time=datetime.datetime.utcnow(),
+            local_version=installed_dist.version,
+            get_remote_version=functools.partial(
+                _get_current_remote_pip_version, session, options
+            ),
+        )
+        if upgrade_prompt is not None:
+            logger.warning("[present-rich] %s", upgrade_prompt)
+    except Exception:
+        logger.warning("There was an error checking the latest version of pip.")
+        logger.debug("See below for error", exc_info=True)
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/_log.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/_log.py
new file mode 100644
index 0000000..92c4c6a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/_log.py
@@ -0,0 +1,38 @@
+"""Customize logging
+
+Defines custom logger class for the `logger.verbose(...)` method.
+
+init_logging() must be called before any other modules that call logging.getLogger.
+"""
+
+import logging
+from typing import Any, cast
+
+# custom log level for `--verbose` output
+# between DEBUG and INFO
+VERBOSE = 15
+
+
+class VerboseLogger(logging.Logger):
+    """Custom Logger, defining a verbose log-level
+
+    VERBOSE is between INFO and DEBUG.
+    """
+
+    def verbose(self, msg: str, *args: Any, **kwargs: Any) -> None:
+        return self.log(VERBOSE, msg, *args, **kwargs)
+
+
+def getLogger(name: str) -> VerboseLogger:
+    """logging.getLogger, but ensures our VerboseLogger class is returned"""
+    return cast(VerboseLogger, logging.getLogger(name))
+
+
+def init_logging() -> None:
+    """Register our VerboseLogger and VERBOSE log level.
+
+    Should be called before any calls to getLogger(),
+    i.e. in pip._internal.__init__
+    """
+    logging.setLoggerClass(VerboseLogger)
+    logging.addLevelName(VERBOSE, "VERBOSE")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/appdirs.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/appdirs.py
new file mode 100644
index 0000000..16933bf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/appdirs.py
@@ -0,0 +1,52 @@
+"""
+This code wraps the vendored appdirs module to so the return values are
+compatible for the current pip code base.
+
+The intention is to rewrite current usages gradually, keeping the tests pass,
+and eventually drop this after all usages are changed.
+"""
+
+import os
+import sys
+from typing import List
+
+from pip._vendor import platformdirs as _appdirs
+
+
+def user_cache_dir(appname: str) -> str:
+    return _appdirs.user_cache_dir(appname, appauthor=False)
+
+
+def _macos_user_config_dir(appname: str, roaming: bool = True) -> str:
+    # Use ~/Application Support/pip, if the directory exists.
+    path = _appdirs.user_data_dir(appname, appauthor=False, roaming=roaming)
+    if os.path.isdir(path):
+        return path
+
+    # Use a Linux-like ~/.config/pip, by default.
+    linux_like_path = "~/.config/"
+    if appname:
+        linux_like_path = os.path.join(linux_like_path, appname)
+
+    return os.path.expanduser(linux_like_path)
+
+
+def user_config_dir(appname: str, roaming: bool = True) -> str:
+    if sys.platform == "darwin":
+        return _macos_user_config_dir(appname, roaming)
+
+    return _appdirs.user_config_dir(appname, appauthor=False, roaming=roaming)
+
+
+# for the discussion regarding site_config_dir locations
+# see <https://github.com/pypa/pip/issues/1733>
+def site_config_dirs(appname: str) -> List[str]:
+    if sys.platform == "darwin":
+        return [_appdirs.site_data_dir(appname, appauthor=False, multipath=True)]
+
+    dirval = _appdirs.site_config_dir(appname, appauthor=False, multipath=True)
+    if sys.platform == "win32":
+        return [dirval]
+
+    # Unix-y system. Look in /etc as well.
+    return dirval.split(os.pathsep) + ["/etc"]
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/compat.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/compat.py
new file mode 100644
index 0000000..3f4d300
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/compat.py
@@ -0,0 +1,63 @@
+"""Stuff that differs in different Python versions and platform
+distributions."""
+
+import logging
+import os
+import sys
+
+__all__ = ["get_path_uid", "stdlib_pkgs", "WINDOWS"]
+
+
+logger = logging.getLogger(__name__)
+
+
+def has_tls() -> bool:
+    try:
+        import _ssl  # noqa: F401  # ignore unused
+
+        return True
+    except ImportError:
+        pass
+
+    from pip._vendor.urllib3.util import IS_PYOPENSSL
+
+    return IS_PYOPENSSL
+
+
+def get_path_uid(path: str) -> int:
+    """
+    Return path's uid.
+
+    Does not follow symlinks:
+        https://github.com/pypa/pip/pull/935#discussion_r5307003
+
+    Placed this function in compat due to differences on AIX and
+    Jython, that should eventually go away.
+
+    :raises OSError: When path is a symlink or can't be read.
+    """
+    if hasattr(os, "O_NOFOLLOW"):
+        fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW)
+        file_uid = os.fstat(fd).st_uid
+        os.close(fd)
+    else:  # AIX and Jython
+        # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW
+        if not os.path.islink(path):
+            # older versions of Jython don't have `os.fstat`
+            file_uid = os.stat(path).st_uid
+        else:
+            # raise OSError for parity with os.O_NOFOLLOW above
+            raise OSError(f"{path} is a symlink; Will not return uid for symlinks")
+    return file_uid
+
+
+# packages in the stdlib that may have installation metadata, but should not be
+# considered 'installed'.  this theoretically could be determined based on
+# dist.location (py27:`sysconfig.get_paths()['stdlib']`,
+# py26:sysconfig.get_config_vars('LIBDEST')), but fear platform variation may
+# make this ineffective, so hard-coding
+stdlib_pkgs = {"python", "wsgiref", "argparse"}
+
+
+# windows detection, covers cpython and ironpython
+WINDOWS = sys.platform.startswith("win") or (sys.platform == "cli" and os.name == "nt")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/compatibility_tags.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/compatibility_tags.py
new file mode 100644
index 0000000..b6ed9a7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/compatibility_tags.py
@@ -0,0 +1,165 @@
+"""Generate and work with PEP 425 Compatibility Tags.
+"""
+
+import re
+from typing import List, Optional, Tuple
+
+from pip._vendor.packaging.tags import (
+    PythonVersion,
+    Tag,
+    compatible_tags,
+    cpython_tags,
+    generic_tags,
+    interpreter_name,
+    interpreter_version,
+    mac_platforms,
+)
+
+_osx_arch_pat = re.compile(r"(.+)_(\d+)_(\d+)_(.+)")
+
+
+def version_info_to_nodot(version_info: Tuple[int, ...]) -> str:
+    # Only use up to the first two numbers.
+    return "".join(map(str, version_info[:2]))
+
+
+def _mac_platforms(arch: str) -> List[str]:
+    match = _osx_arch_pat.match(arch)
+    if match:
+        name, major, minor, actual_arch = match.groups()
+        mac_version = (int(major), int(minor))
+        arches = [
+            # Since we have always only checked that the platform starts
+            # with "macosx", for backwards-compatibility we extract the
+            # actual prefix provided by the user in case they provided
+            # something like "macosxcustom_". It may be good to remove
+            # this as undocumented or deprecate it in the future.
+            "{}_{}".format(name, arch[len("macosx_") :])
+            for arch in mac_platforms(mac_version, actual_arch)
+        ]
+    else:
+        # arch pattern didn't match (?!)
+        arches = [arch]
+    return arches
+
+
+def _custom_manylinux_platforms(arch: str) -> List[str]:
+    arches = [arch]
+    arch_prefix, arch_sep, arch_suffix = arch.partition("_")
+    if arch_prefix == "manylinux2014":
+        # manylinux1/manylinux2010 wheels run on most manylinux2014 systems
+        # with the exception of wheels depending on ncurses. PEP 599 states
+        # manylinux1/manylinux2010 wheels should be considered
+        # manylinux2014 wheels:
+        # https://www.python.org/dev/peps/pep-0599/#backwards-compatibility-with-manylinux2010-wheels
+        if arch_suffix in {"i686", "x86_64"}:
+            arches.append("manylinux2010" + arch_sep + arch_suffix)
+            arches.append("manylinux1" + arch_sep + arch_suffix)
+    elif arch_prefix == "manylinux2010":
+        # manylinux1 wheels run on most manylinux2010 systems with the
+        # exception of wheels depending on ncurses. PEP 571 states
+        # manylinux1 wheels should be considered manylinux2010 wheels:
+        # https://www.python.org/dev/peps/pep-0571/#backwards-compatibility-with-manylinux1-wheels
+        arches.append("manylinux1" + arch_sep + arch_suffix)
+    return arches
+
+
+def _get_custom_platforms(arch: str) -> List[str]:
+    arch_prefix, arch_sep, arch_suffix = arch.partition("_")
+    if arch.startswith("macosx"):
+        arches = _mac_platforms(arch)
+    elif arch_prefix in ["manylinux2014", "manylinux2010"]:
+        arches = _custom_manylinux_platforms(arch)
+    else:
+        arches = [arch]
+    return arches
+
+
+def _expand_allowed_platforms(platforms: Optional[List[str]]) -> Optional[List[str]]:
+    if not platforms:
+        return None
+
+    seen = set()
+    result = []
+
+    for p in platforms:
+        if p in seen:
+            continue
+        additions = [c for c in _get_custom_platforms(p) if c not in seen]
+        seen.update(additions)
+        result.extend(additions)
+
+    return result
+
+
+def _get_python_version(version: str) -> PythonVersion:
+    if len(version) > 1:
+        return int(version[0]), int(version[1:])
+    else:
+        return (int(version[0]),)
+
+
+def _get_custom_interpreter(
+    implementation: Optional[str] = None, version: Optional[str] = None
+) -> str:
+    if implementation is None:
+        implementation = interpreter_name()
+    if version is None:
+        version = interpreter_version()
+    return f"{implementation}{version}"
+
+
+def get_supported(
+    version: Optional[str] = None,
+    platforms: Optional[List[str]] = None,
+    impl: Optional[str] = None,
+    abis: Optional[List[str]] = None,
+) -> List[Tag]:
+    """Return a list of supported tags for each version specified in
+    `versions`.
+
+    :param version: a string version, of the form "33" or "32",
+        or None. The version will be assumed to support our ABI.
+    :param platform: specify a list of platforms you want valid
+        tags for, or None. If None, use the local system platform.
+    :param impl: specify the exact implementation you want valid
+        tags for, or None. If None, use the local interpreter impl.
+    :param abis: specify a list of abis you want valid
+        tags for, or None. If None, use the local interpreter abi.
+    """
+    supported: List[Tag] = []
+
+    python_version: Optional[PythonVersion] = None
+    if version is not None:
+        python_version = _get_python_version(version)
+
+    interpreter = _get_custom_interpreter(impl, version)
+
+    platforms = _expand_allowed_platforms(platforms)
+
+    is_cpython = (impl or interpreter_name()) == "cp"
+    if is_cpython:
+        supported.extend(
+            cpython_tags(
+                python_version=python_version,
+                abis=abis,
+                platforms=platforms,
+            )
+        )
+    else:
+        supported.extend(
+            generic_tags(
+                interpreter=interpreter,
+                abis=abis,
+                platforms=platforms,
+            )
+        )
+    supported.extend(
+        compatible_tags(
+            python_version=python_version,
+            interpreter=interpreter,
+            platforms=platforms,
+        )
+    )
+
+    return supported
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/datetime.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/datetime.py
new file mode 100644
index 0000000..8668b3b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/datetime.py
@@ -0,0 +1,11 @@
+"""For when pip wants to check the date or time.
+"""
+
+import datetime
+
+
+def today_is_later_than(year: int, month: int, day: int) -> bool:
+    today = datetime.date.today()
+    given = datetime.date(year, month, day)
+
+    return today > given
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/deprecation.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/deprecation.py
new file mode 100644
index 0000000..18e9be9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/deprecation.py
@@ -0,0 +1,188 @@
+"""
+A module that implements tooling to enable easy warnings about deprecations.
+"""
+
+import logging
+import warnings
+from typing import Any, Optional, TextIO, Type, Union
+
+from pip._vendor.packaging.version import parse
+
+from pip import __version__ as current_version  # NOTE: tests patch this name.
+
+DEPRECATION_MSG_PREFIX = "DEPRECATION: "
+
+
+class PipDeprecationWarning(Warning):
+    pass
+
+
+_original_showwarning: Any = None
+
+
+# Warnings <-> Logging Integration
+def _showwarning(
+    message: Union[Warning, str],
+    category: Type[Warning],
+    filename: str,
+    lineno: int,
+    file: Optional[TextIO] = None,
+    line: Optional[str] = None,
+) -> None:
+    if file is not None:
+        if _original_showwarning is not None:
+            _original_showwarning(message, category, filename, lineno, file, line)
+    elif issubclass(category, PipDeprecationWarning):
+        # We use a specially named logger which will handle all of the
+        # deprecation messages for pip.
+        logger = logging.getLogger("pip._internal.deprecations")
+        logger.warning(message)
+    else:
+        _original_showwarning(message, category, filename, lineno, file, line)
+
+
+def install_warning_logger() -> None:
+    # Enable our Deprecation Warnings
+    warnings.simplefilter("default", PipDeprecationWarning, append=True)
+
+    global _original_showwarning
+
+    if _original_showwarning is None:
+        _original_showwarning = warnings.showwarning
+        warnings.showwarning = _showwarning
+
+
+def deprecated(
+    *,
+    reason: str,
+    replacement: Optional[str],
+    gone_in: Optional[str],
+    feature_flag: Optional[str] = None,
+    issue: Optional[int] = None,
+) -> None:
+    """Helper to deprecate existing functionality.
+
+    reason:
+        Textual reason shown to the user about why this functionality has
+        been deprecated. Should be a complete sentence.
+    replacement:
+        Textual suggestion shown to the user about what alternative
+        functionality they can use.
+    gone_in:
+        The version of pip does this functionality should get removed in.
+        Raises an error if pip's current version is greater than or equal to
+        this.
+    feature_flag:
+        Command-line flag of the form --use-feature={feature_flag} for testing
+        upcoming functionality.
+    issue:
+        Issue number on the tracker that would serve as a useful place for
+        users to find related discussion and provide feedback.
+    """
+
+    # Determine whether or not the feature is already gone in this version.
+    is_gone = gone_in is not None and parse(current_version) >= parse(gone_in)
+
+    message_parts = [
+        (reason, f"{DEPRECATION_MSG_PREFIX}{{}}"),
+        (
+            gone_in,
+            "pip {} will enforce this behaviour change."
+            if not is_gone
+            else "Since pip {}, this is no longer supported.",
+        ),
+        (
+            replacement,
+            "A possible replacement is {}.",
+        ),
+        (
+            feature_flag,
+            "You can use the flag --use-feature={} to test the upcoming behaviour."
+            if not is_gone
+            else None,
+        ),
+        (
+            issue,
+            "Discussion can be found at https://github.com/pypa/pip/issues/{}",
+        ),
+    ]
+
+    message = " ".join(
+        format_str.format(value)
+        for value, format_str in message_parts
+        if format_str is not None and value is not None
+    )
+
+    # Raise as an error if this behaviour is deprecated.
+    if is_gone:
+        raise PipDeprecationWarning(message)
+
+    warnings.warn(message, category=PipDeprecationWarning, stacklevel=2)
+
+
+class LegacyInstallReason:
+    def __init__(
+        self,
+        reason: str,
+        replacement: Optional[str] = None,
+        gone_in: Optional[str] = None,
+        feature_flag: Optional[str] = None,
+        issue: Optional[int] = None,
+        emit_after_success: bool = False,
+        emit_before_install: bool = False,
+    ):
+        self._reason = reason
+        self._replacement = replacement
+        self._gone_in = gone_in
+        self._feature_flag = feature_flag
+        self._issue = issue
+        self.emit_after_success = emit_after_success
+        self.emit_before_install = emit_before_install
+
+    def emit_deprecation(self, name: str) -> None:
+        deprecated(
+            reason=self._reason.format(name=name),
+            replacement=self._replacement,
+            gone_in=self._gone_in,
+            feature_flag=self._feature_flag,
+            issue=self._issue,
+        )
+
+
+LegacyInstallReasonFailedBdistWheel = LegacyInstallReason(
+    reason=(
+        "{name} was installed using the legacy 'setup.py install' "
+        "method, because a wheel could not be built for it."
+    ),
+    replacement="to fix the wheel build issue reported above",
+    gone_in="23.1",
+    issue=8368,
+    emit_after_success=True,
+)
+
+
+LegacyInstallReasonMissingWheelPackage = LegacyInstallReason(
+    reason=(
+        "{name} is being installed using the legacy "
+        "'setup.py install' method, because it does not have a "
+        "'pyproject.toml' and the 'wheel' package "
+        "is not installed."
+    ),
+    replacement="to enable the '--use-pep517' option",
+    gone_in="23.1",
+    issue=8559,
+    emit_before_install=True,
+)
+
+LegacyInstallReasonNoBinaryForcesSetuptoolsInstall = LegacyInstallReason(
+    reason=(
+        "{name} is being installed using the legacy "
+        "'setup.py install' method, because the '--no-binary' option was enabled "
+        "for it and this currently disables local wheel building for projects that "
+        "don't have a 'pyproject.toml' file."
+    ),
+    replacement="to enable the '--use-pep517' option",
+    gone_in="23.1",
+    issue=11451,
+    emit_before_install=True,
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/direct_url_helpers.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/direct_url_helpers.py
new file mode 100644
index 0000000..0e8e5e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/direct_url_helpers.py
@@ -0,0 +1,87 @@
+from typing import Optional
+
+from pip._internal.models.direct_url import ArchiveInfo, DirectUrl, DirInfo, VcsInfo
+from pip._internal.models.link import Link
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs import vcs
+
+
+def direct_url_as_pep440_direct_reference(direct_url: DirectUrl, name: str) -> str:
+    """Convert a DirectUrl to a pip requirement string."""
+    direct_url.validate()  # if invalid, this is a pip bug
+    requirement = name + " @ "
+    fragments = []
+    if isinstance(direct_url.info, VcsInfo):
+        requirement += "{}+{}@{}".format(
+            direct_url.info.vcs, direct_url.url, direct_url.info.commit_id
+        )
+    elif isinstance(direct_url.info, ArchiveInfo):
+        requirement += direct_url.url
+        if direct_url.info.hash:
+            fragments.append(direct_url.info.hash)
+    else:
+        assert isinstance(direct_url.info, DirInfo)
+        requirement += direct_url.url
+    if direct_url.subdirectory:
+        fragments.append("subdirectory=" + direct_url.subdirectory)
+    if fragments:
+        requirement += "#" + "&".join(fragments)
+    return requirement
+
+
+def direct_url_for_editable(source_dir: str) -> DirectUrl:
+    return DirectUrl(
+        url=path_to_url(source_dir),
+        info=DirInfo(editable=True),
+    )
+
+
+def direct_url_from_link(
+    link: Link, source_dir: Optional[str] = None, link_is_in_wheel_cache: bool = False
+) -> DirectUrl:
+    if link.is_vcs:
+        vcs_backend = vcs.get_backend_for_scheme(link.scheme)
+        assert vcs_backend
+        url, requested_revision, _ = vcs_backend.get_url_rev_and_auth(
+            link.url_without_fragment
+        )
+        # For VCS links, we need to find out and add commit_id.
+        if link_is_in_wheel_cache:
+            # If the requested VCS link corresponds to a cached
+            # wheel, it means the requested revision was an
+            # immutable commit hash, otherwise it would not have
+            # been cached. In that case we don't have a source_dir
+            # with the VCS checkout.
+            assert requested_revision
+            commit_id = requested_revision
+        else:
+            # If the wheel was not in cache, it means we have
+            # had to checkout from VCS to build and we have a source_dir
+            # which we can inspect to find out the commit id.
+            assert source_dir
+            commit_id = vcs_backend.get_revision(source_dir)
+        return DirectUrl(
+            url=url,
+            info=VcsInfo(
+                vcs=vcs_backend.name,
+                commit_id=commit_id,
+                requested_revision=requested_revision,
+            ),
+            subdirectory=link.subdirectory_fragment,
+        )
+    elif link.is_existing_dir():
+        return DirectUrl(
+            url=link.url_without_fragment,
+            info=DirInfo(),
+            subdirectory=link.subdirectory_fragment,
+        )
+    else:
+        hash = None
+        hash_name = link.hash_name
+        if hash_name:
+            hash = f"{hash_name}={link.hash}"
+        return DirectUrl(
+            url=link.url_without_fragment,
+            info=ArchiveInfo(hash=hash),
+            subdirectory=link.subdirectory_fragment,
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/distutils_args.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/distutils_args.py
new file mode 100644
index 0000000..2fd1862
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/distutils_args.py
@@ -0,0 +1,43 @@
+from getopt import GetoptError, getopt
+from typing import Dict, List
+
+_options = [
+    "exec-prefix=",
+    "home=",
+    "install-base=",
+    "install-data=",
+    "install-headers=",
+    "install-lib=",
+    "install-platlib=",
+    "install-purelib=",
+    "install-scripts=",
+    "prefix=",
+    "root=",
+    "user",
+]
+
+
+def parse_distutils_args(args: List[str]) -> Dict[str, str]:
+    """Parse provided arguments, returning an object that has the matched arguments.
+
+    Any unknown arguments are ignored.
+    """
+    result = {}
+    for arg in args:
+        try:
+            parsed_opt, _ = getopt(args=[arg], shortopts="", longopts=_options)
+        except GetoptError:
+            # We don't care about any other options, which here may be
+            # considered unrecognized since our option list is not
+            # exhaustive.
+            continue
+
+        if not parsed_opt:
+            continue
+
+        option = parsed_opt[0]
+        name_from_parsed = option[0][2:].replace("-", "_")
+        value_from_parsed = option[1] or "true"
+        result[name_from_parsed] = value_from_parsed
+
+    return result
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/egg_link.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/egg_link.py
new file mode 100644
index 0000000..9e0da8d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/egg_link.py
@@ -0,0 +1,75 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import os
+import re
+import sys
+from typing import Optional
+
+from pip._internal.locations import site_packages, user_site
+from pip._internal.utils.virtualenv import (
+    running_under_virtualenv,
+    virtualenv_no_global,
+)
+
+__all__ = [
+    "egg_link_path_from_sys_path",
+    "egg_link_path_from_location",
+]
+
+
+def _egg_link_name(raw_name: str) -> str:
+    """
+    Convert a Name metadata value to a .egg-link name, by applying
+    the same substitution as pkg_resources's safe_name function.
+    Note: we cannot use canonicalize_name because it has a different logic.
+    """
+    return re.sub("[^A-Za-z0-9.]+", "-", raw_name) + ".egg-link"
+
+
+def egg_link_path_from_sys_path(raw_name: str) -> Optional[str]:
+    """
+    Look for a .egg-link file for project name, by walking sys.path.
+    """
+    egg_link_name = _egg_link_name(raw_name)
+    for path_item in sys.path:
+        egg_link = os.path.join(path_item, egg_link_name)
+        if os.path.isfile(egg_link):
+            return egg_link
+    return None
+
+
+def egg_link_path_from_location(raw_name: str) -> Optional[str]:
+    """
+    Return the path for the .egg-link file if it exists, otherwise, None.
+
+    There's 3 scenarios:
+    1) not in a virtualenv
+       try to find in site.USER_SITE, then site_packages
+    2) in a no-global virtualenv
+       try to find in site_packages
+    3) in a yes-global virtualenv
+       try to find in site_packages, then site.USER_SITE
+       (don't look in global location)
+
+    For #1 and #3, there could be odd cases, where there's an egg-link in 2
+    locations.
+
+    This method will just return the first one found.
+    """
+    sites = []
+    if running_under_virtualenv():
+        sites.append(site_packages)
+        if not virtualenv_no_global() and user_site:
+            sites.append(user_site)
+    else:
+        if user_site:
+            sites.append(user_site)
+        sites.append(site_packages)
+
+    egg_link_name = _egg_link_name(raw_name)
+    for site in sites:
+        egglink = os.path.join(site, egg_link_name)
+        if os.path.isfile(egglink):
+            return egglink
+    return None
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/encoding.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/encoding.py
new file mode 100644
index 0000000..008f06a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/encoding.py
@@ -0,0 +1,36 @@
+import codecs
+import locale
+import re
+import sys
+from typing import List, Tuple
+
+BOMS: List[Tuple[bytes, str]] = [
+    (codecs.BOM_UTF8, "utf-8"),
+    (codecs.BOM_UTF16, "utf-16"),
+    (codecs.BOM_UTF16_BE, "utf-16-be"),
+    (codecs.BOM_UTF16_LE, "utf-16-le"),
+    (codecs.BOM_UTF32, "utf-32"),
+    (codecs.BOM_UTF32_BE, "utf-32-be"),
+    (codecs.BOM_UTF32_LE, "utf-32-le"),
+]
+
+ENCODING_RE = re.compile(rb"coding[:=]\s*([-\w.]+)")
+
+
+def auto_decode(data: bytes) -> str:
+    """Check a bytes string for a BOM to correctly detect the encoding
+
+    Fallback to locale.getpreferredencoding(False) like open() on Python3"""
+    for bom, encoding in BOMS:
+        if data.startswith(bom):
+            return data[len(bom) :].decode(encoding)
+    # Lets check the first two lines as in PEP263
+    for line in data.split(b"\n")[:2]:
+        if line[0:1] == b"#" and ENCODING_RE.search(line):
+            result = ENCODING_RE.search(line)
+            assert result is not None
+            encoding = result.groups()[0].decode("ascii")
+            return data.decode(encoding)
+    return data.decode(
+        locale.getpreferredencoding(False) or sys.getdefaultencoding(),
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/entrypoints.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/entrypoints.py
new file mode 100644
index 0000000..1501369
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/entrypoints.py
@@ -0,0 +1,84 @@
+import itertools
+import os
+import shutil
+import sys
+from typing import List, Optional
+
+from pip._internal.cli.main import main
+from pip._internal.utils.compat import WINDOWS
+
+_EXECUTABLE_NAMES = [
+    "pip",
+    f"pip{sys.version_info.major}",
+    f"pip{sys.version_info.major}.{sys.version_info.minor}",
+]
+if WINDOWS:
+    _allowed_extensions = {"", ".exe"}
+    _EXECUTABLE_NAMES = [
+        "".join(parts)
+        for parts in itertools.product(_EXECUTABLE_NAMES, _allowed_extensions)
+    ]
+
+
+def _wrapper(args: Optional[List[str]] = None) -> int:
+    """Central wrapper for all old entrypoints.
+
+    Historically pip has had several entrypoints defined. Because of issues
+    arising from PATH, sys.path, multiple Pythons, their interactions, and most
+    of them having a pip installed, users suffer every time an entrypoint gets
+    moved.
+
+    To alleviate this pain, and provide a mechanism for warning users and
+    directing them to an appropriate place for help, we now define all of
+    our old entrypoints as wrappers for the current one.
+    """
+    sys.stderr.write(
+        "WARNING: pip is being invoked by an old script wrapper. This will "
+        "fail in a future version of pip.\n"
+        "Please see https://github.com/pypa/pip/issues/5599 for advice on "
+        "fixing the underlying issue.\n"
+        "To avoid this problem you can invoke Python with '-m pip' instead of "
+        "running pip directly.\n"
+    )
+    return main(args)
+
+
+def get_best_invocation_for_this_pip() -> str:
+    """Try to figure out the best way to invoke pip in the current environment."""
+    binary_directory = "Scripts" if WINDOWS else "bin"
+    binary_prefix = os.path.join(sys.prefix, binary_directory)
+
+    # Try to use pip[X[.Y]] names, if those executables for this environment are
+    # the first on PATH with that name.
+    path_parts = os.path.normcase(os.environ.get("PATH", "")).split(os.pathsep)
+    exe_are_in_PATH = os.path.normcase(binary_prefix) in path_parts
+    if exe_are_in_PATH:
+        for exe_name in _EXECUTABLE_NAMES:
+            found_executable = shutil.which(exe_name)
+            binary_executable = os.path.join(binary_prefix, exe_name)
+            if (
+                found_executable
+                and os.path.exists(binary_executable)
+                and os.path.samefile(
+                    found_executable,
+                    binary_executable,
+                )
+            ):
+                return exe_name
+
+    # Use the `-m` invocation, if there's no "nice" invocation.
+    return f"{get_best_invocation_for_this_python()} -m pip"
+
+
+def get_best_invocation_for_this_python() -> str:
+    """Try to figure out the best way to invoke the current Python."""
+    exe = sys.executable
+    exe_name = os.path.basename(exe)
+
+    # Try to use the basename, if it's the first executable.
+    found_executable = shutil.which(exe_name)
+    if found_executable and os.path.samefile(found_executable, exe):
+        return exe_name
+
+    # Use the full executable name, because we couldn't find something simpler.
+    return exe
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/filesystem.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/filesystem.py
new file mode 100644
index 0000000..83c2df7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/filesystem.py
@@ -0,0 +1,153 @@
+import fnmatch
+import os
+import os.path
+import random
+import sys
+from contextlib import contextmanager
+from tempfile import NamedTemporaryFile
+from typing import Any, BinaryIO, Generator, List, Union, cast
+
+from pip._vendor.tenacity import retry, stop_after_delay, wait_fixed
+
+from pip._internal.utils.compat import get_path_uid
+from pip._internal.utils.misc import format_size
+
+
+def check_path_owner(path: str) -> bool:
+    # If we don't have a way to check the effective uid of this process, then
+    # we'll just assume that we own the directory.
+    if sys.platform == "win32" or not hasattr(os, "geteuid"):
+        return True
+
+    assert os.path.isabs(path)
+
+    previous = None
+    while path != previous:
+        if os.path.lexists(path):
+            # Check if path is writable by current user.
+            if os.geteuid() == 0:
+                # Special handling for root user in order to handle properly
+                # cases where users use sudo without -H flag.
+                try:
+                    path_uid = get_path_uid(path)
+                except OSError:
+                    return False
+                return path_uid == 0
+            else:
+                return os.access(path, os.W_OK)
+        else:
+            previous, path = path, os.path.dirname(path)
+    return False  # assume we don't own the path
+
+
+@contextmanager
+def adjacent_tmp_file(path: str, **kwargs: Any) -> Generator[BinaryIO, None, None]:
+    """Return a file-like object pointing to a tmp file next to path.
+
+    The file is created securely and is ensured to be written to disk
+    after the context reaches its end.
+
+    kwargs will be passed to tempfile.NamedTemporaryFile to control
+    the way the temporary file will be opened.
+    """
+    with NamedTemporaryFile(
+        delete=False,
+        dir=os.path.dirname(path),
+        prefix=os.path.basename(path),
+        suffix=".tmp",
+        **kwargs,
+    ) as f:
+        result = cast(BinaryIO, f)
+        try:
+            yield result
+        finally:
+            result.flush()
+            os.fsync(result.fileno())
+
+
+# Tenacity raises RetryError by default, explicitly raise the original exception
+_replace_retry = retry(reraise=True, stop=stop_after_delay(1), wait=wait_fixed(0.25))
+
+replace = _replace_retry(os.replace)
+
+
+# test_writable_dir and _test_writable_dir_win are copied from Flit,
+# with the author's agreement to also place them under pip's license.
+def test_writable_dir(path: str) -> bool:
+    """Check if a directory is writable.
+
+    Uses os.access() on POSIX, tries creating files on Windows.
+    """
+    # If the directory doesn't exist, find the closest parent that does.
+    while not os.path.isdir(path):
+        parent = os.path.dirname(path)
+        if parent == path:
+            break  # Should never get here, but infinite loops are bad
+        path = parent
+
+    if os.name == "posix":
+        return os.access(path, os.W_OK)
+
+    return _test_writable_dir_win(path)
+
+
+def _test_writable_dir_win(path: str) -> bool:
+    # os.access doesn't work on Windows: http://bugs.python.org/issue2528
+    # and we can't use tempfile: http://bugs.python.org/issue22107
+    basename = "accesstest_deleteme_fishfingers_custard_"
+    alphabet = "abcdefghijklmnopqrstuvwxyz0123456789"
+    for _ in range(10):
+        name = basename + "".join(random.choice(alphabet) for _ in range(6))
+        file = os.path.join(path, name)
+        try:
+            fd = os.open(file, os.O_RDWR | os.O_CREAT | os.O_EXCL)
+        except FileExistsError:
+            pass
+        except PermissionError:
+            # This could be because there's a directory with the same name.
+            # But it's highly unlikely there's a directory called that,
+            # so we'll assume it's because the parent dir is not writable.
+            # This could as well be because the parent dir is not readable,
+            # due to non-privileged user access.
+            return False
+        else:
+            os.close(fd)
+            os.unlink(file)
+            return True
+
+    # This should never be reached
+    raise OSError("Unexpected condition testing for writable directory")
+
+
+def find_files(path: str, pattern: str) -> List[str]:
+    """Returns a list of absolute paths of files beneath path, recursively,
+    with filenames which match the UNIX-style shell glob pattern."""
+    result: List[str] = []
+    for root, _, files in os.walk(path):
+        matches = fnmatch.filter(files, pattern)
+        result.extend(os.path.join(root, f) for f in matches)
+    return result
+
+
+def file_size(path: str) -> Union[int, float]:
+    # If it's a symlink, return 0.
+    if os.path.islink(path):
+        return 0
+    return os.path.getsize(path)
+
+
+def format_file_size(path: str) -> str:
+    return format_size(file_size(path))
+
+
+def directory_size(path: str) -> Union[int, float]:
+    size = 0.0
+    for root, _dirs, files in os.walk(path):
+        for filename in files:
+            file_path = os.path.join(root, filename)
+            size += file_size(file_path)
+    return size
+
+
+def format_directory_size(path: str) -> str:
+    return format_size(directory_size(path))
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/filetypes.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/filetypes.py
new file mode 100644
index 0000000..5948570
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/filetypes.py
@@ -0,0 +1,27 @@
+"""Filetype information.
+"""
+
+from typing import Tuple
+
+from pip._internal.utils.misc import splitext
+
+WHEEL_EXTENSION = ".whl"
+BZ2_EXTENSIONS: Tuple[str, ...] = (".tar.bz2", ".tbz")
+XZ_EXTENSIONS: Tuple[str, ...] = (
+    ".tar.xz",
+    ".txz",
+    ".tlz",
+    ".tar.lz",
+    ".tar.lzma",
+)
+ZIP_EXTENSIONS: Tuple[str, ...] = (".zip", WHEEL_EXTENSION)
+TAR_EXTENSIONS: Tuple[str, ...] = (".tar.gz", ".tgz", ".tar")
+ARCHIVE_EXTENSIONS = ZIP_EXTENSIONS + BZ2_EXTENSIONS + TAR_EXTENSIONS + XZ_EXTENSIONS
+
+
+def is_archive_file(name: str) -> bool:
+    """Return True if `name` is a considered as an archive file."""
+    ext = splitext(name)[1].lower()
+    if ext in ARCHIVE_EXTENSIONS:
+        return True
+    return False
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/glibc.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/glibc.py
new file mode 100644
index 0000000..7bd3c20
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/glibc.py
@@ -0,0 +1,88 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import os
+import sys
+from typing import Optional, Tuple
+
+
+def glibc_version_string() -> Optional[str]:
+    "Returns glibc version string, or None if not using glibc."
+    return glibc_version_string_confstr() or glibc_version_string_ctypes()
+
+
+def glibc_version_string_confstr() -> Optional[str]:
+    "Primary implementation of glibc_version_string using os.confstr."
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module:
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c9d0921ff3d70e1127ca1b71/Lib/platform.py#L175-L183
+    if sys.platform == "win32":
+        return None
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17":
+        _, version = os.confstr("CS_GNU_LIBC_VERSION").split()
+    except (AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def glibc_version_string_ctypes() -> Optional[str]:
+    "Fallback implementation of glibc_version_string using ctypes."
+
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# platform.libc_ver regularly returns completely nonsensical glibc
+# versions. E.g. on my computer, platform says:
+#
+#   ~$ python2.7 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.7')
+#   ~$ python3.5 -c 'import platform; print(platform.libc_ver())'
+#   ('glibc', '2.9')
+#
+# But the truth is:
+#
+#   ~$ ldd --version
+#   ldd (Debian GLIBC 2.22-11) 2.22
+#
+# This is unfortunate, because it means that the linehaul data on libc
+# versions that was generated by pip 8.1.2 and earlier is useless and
+# misleading. Solution: instead of using platform, use our code that actually
+# works.
+def libc_ver() -> Tuple[str, str]:
+    """Try to determine the glibc version
+
+    Returns a tuple of strings (lib, version) which default to empty strings
+    in case the lookup fails.
+    """
+    glibc_version = glibc_version_string()
+    if glibc_version is None:
+        return ("", "")
+    else:
+        return ("glibc", glibc_version)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/hashes.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/hashes.py
new file mode 100644
index 0000000..7672730
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/hashes.py
@@ -0,0 +1,144 @@
+import hashlib
+from typing import TYPE_CHECKING, BinaryIO, Dict, Iterable, List, Optional
+
+from pip._internal.exceptions import HashMismatch, HashMissing, InstallationError
+from pip._internal.utils.misc import read_chunks
+
+if TYPE_CHECKING:
+    from hashlib import _Hash
+
+    # NoReturn introduced in 3.6.2; imported only for type checking to maintain
+    # pip compatibility with older patch versions of Python 3.6
+    from typing import NoReturn
+
+
+# The recommended hash algo of the moment. Change this whenever the state of
+# the art changes; it won't hurt backward compatibility.
+FAVORITE_HASH = "sha256"
+
+
+# Names of hashlib algorithms allowed by the --hash option and ``pip hash``
+# Currently, those are the ones at least as collision-resistant as sha256.
+STRONG_HASHES = ["sha256", "sha384", "sha512"]
+
+
+class Hashes:
+    """A wrapper that builds multiple hashes at once and checks them against
+    known-good values
+
+    """
+
+    def __init__(self, hashes: Optional[Dict[str, List[str]]] = None) -> None:
+        """
+        :param hashes: A dict of algorithm names pointing to lists of allowed
+            hex digests
+        """
+        allowed = {}
+        if hashes is not None:
+            for alg, keys in hashes.items():
+                # Make sure values are always sorted (to ease equality checks)
+                allowed[alg] = sorted(keys)
+        self._allowed = allowed
+
+    def __and__(self, other: "Hashes") -> "Hashes":
+        if not isinstance(other, Hashes):
+            return NotImplemented
+
+        # If either of the Hashes object is entirely empty (i.e. no hash
+        # specified at all), all hashes from the other object are allowed.
+        if not other:
+            return self
+        if not self:
+            return other
+
+        # Otherwise only hashes that present in both objects are allowed.
+        new = {}
+        for alg, values in other._allowed.items():
+            if alg not in self._allowed:
+                continue
+            new[alg] = [v for v in values if v in self._allowed[alg]]
+        return Hashes(new)
+
+    @property
+    def digest_count(self) -> int:
+        return sum(len(digests) for digests in self._allowed.values())
+
+    def is_hash_allowed(self, hash_name: str, hex_digest: str) -> bool:
+        """Return whether the given hex digest is allowed."""
+        return hex_digest in self._allowed.get(hash_name, [])
+
+    def check_against_chunks(self, chunks: Iterable[bytes]) -> None:
+        """Check good hashes against ones built from iterable of chunks of
+        data.
+
+        Raise HashMismatch if none match.
+
+        """
+        gots = {}
+        for hash_name in self._allowed.keys():
+            try:
+                gots[hash_name] = hashlib.new(hash_name)
+            except (ValueError, TypeError):
+                raise InstallationError(f"Unknown hash name: {hash_name}")
+
+        for chunk in chunks:
+            for hash in gots.values():
+                hash.update(chunk)
+
+        for hash_name, got in gots.items():
+            if got.hexdigest() in self._allowed[hash_name]:
+                return
+        self._raise(gots)
+
+    def _raise(self, gots: Dict[str, "_Hash"]) -> "NoReturn":
+        raise HashMismatch(self._allowed, gots)
+
+    def check_against_file(self, file: BinaryIO) -> None:
+        """Check good hashes against a file-like object
+
+        Raise HashMismatch if none match.
+
+        """
+        return self.check_against_chunks(read_chunks(file))
+
+    def check_against_path(self, path: str) -> None:
+        with open(path, "rb") as file:
+            return self.check_against_file(file)
+
+    def __bool__(self) -> bool:
+        """Return whether I know any known-good hashes."""
+        return bool(self._allowed)
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Hashes):
+            return NotImplemented
+        return self._allowed == other._allowed
+
+    def __hash__(self) -> int:
+        return hash(
+            ",".join(
+                sorted(
+                    ":".join((alg, digest))
+                    for alg, digest_list in self._allowed.items()
+                    for digest in digest_list
+                )
+            )
+        )
+
+
+class MissingHashes(Hashes):
+    """A workalike for Hashes used when we're missing a hash for a requirement
+
+    It computes the actual hash of the requirement and raises a HashMissing
+    exception showing it to the user.
+
+    """
+
+    def __init__(self) -> None:
+        """Don't offer the ``hashes`` kwarg."""
+        # Pass our favorite hash in to generate a "gotten hash". With the
+        # empty list, it will never match, so an error will always raise.
+        super().__init__(hashes={FAVORITE_HASH: []})
+
+    def _raise(self, gots: Dict[str, "_Hash"]) -> "NoReturn":
+        raise HashMissing(gots[FAVORITE_HASH].hexdigest())
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/inject_securetransport.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/inject_securetransport.py
new file mode 100644
index 0000000..276aa79
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/inject_securetransport.py
@@ -0,0 +1,35 @@
+"""A helper module that injects SecureTransport, on import.
+
+The import should be done as early as possible, to ensure all requests and
+sessions (or whatever) are created after injecting SecureTransport.
+
+Note that we only do the injection on macOS, when the linked OpenSSL is too
+old to handle TLSv1.2.
+"""
+
+import sys
+
+
+def inject_securetransport() -> None:
+    # Only relevant on macOS
+    if sys.platform != "darwin":
+        return
+
+    try:
+        import ssl
+    except ImportError:
+        return
+
+    # Checks for OpenSSL 1.0.1
+    if ssl.OPENSSL_VERSION_NUMBER >= 0x1000100F:
+        return
+
+    try:
+        from pip._vendor.urllib3.contrib import securetransport
+    except (ImportError, OSError):
+        return
+
+    securetransport.inject_into_urllib3()
+
+
+inject_securetransport()
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/logging.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/logging.py
new file mode 100644
index 0000000..c10e1f4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/logging.py
@@ -0,0 +1,348 @@
+import contextlib
+import errno
+import logging
+import logging.handlers
+import os
+import sys
+import threading
+from dataclasses import dataclass
+from io import TextIOWrapper
+from logging import Filter
+from typing import Any, ClassVar, Generator, List, Optional, TextIO, Type
+
+from pip._vendor.rich.console import (
+    Console,
+    ConsoleOptions,
+    ConsoleRenderable,
+    RenderableType,
+    RenderResult,
+    RichCast,
+)
+from pip._vendor.rich.highlighter import NullHighlighter
+from pip._vendor.rich.logging import RichHandler
+from pip._vendor.rich.segment import Segment
+from pip._vendor.rich.style import Style
+
+from pip._internal.utils._log import VERBOSE, getLogger
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.deprecation import DEPRECATION_MSG_PREFIX
+from pip._internal.utils.misc import ensure_dir
+
+_log_state = threading.local()
+subprocess_logger = getLogger("pip.subprocessor")
+
+
+class BrokenStdoutLoggingError(Exception):
+    """
+    Raised if BrokenPipeError occurs for the stdout stream while logging.
+    """
+
+
+def _is_broken_pipe_error(exc_class: Type[BaseException], exc: BaseException) -> bool:
+    if exc_class is BrokenPipeError:
+        return True
+
+    # On Windows, a broken pipe can show up as EINVAL rather than EPIPE:
+    # https://bugs.python.org/issue19612
+    # https://bugs.python.org/issue30418
+    if not WINDOWS:
+        return False
+
+    return isinstance(exc, OSError) and exc.errno in (errno.EINVAL, errno.EPIPE)
+
+
+@contextlib.contextmanager
+def indent_log(num: int = 2) -> Generator[None, None, None]:
+    """
+    A context manager which will cause the log output to be indented for any
+    log messages emitted inside it.
+    """
+    # For thread-safety
+    _log_state.indentation = get_indentation()
+    _log_state.indentation += num
+    try:
+        yield
+    finally:
+        _log_state.indentation -= num
+
+
+def get_indentation() -> int:
+    return getattr(_log_state, "indentation", 0)
+
+
+class IndentingFormatter(logging.Formatter):
+    default_time_format = "%Y-%m-%dT%H:%M:%S"
+
+    def __init__(
+        self,
+        *args: Any,
+        add_timestamp: bool = False,
+        **kwargs: Any,
+    ) -> None:
+        """
+        A logging.Formatter that obeys the indent_log() context manager.
+
+        :param add_timestamp: A bool indicating output lines should be prefixed
+            with their record's timestamp.
+        """
+        self.add_timestamp = add_timestamp
+        super().__init__(*args, **kwargs)
+
+    def get_message_start(self, formatted: str, levelno: int) -> str:
+        """
+        Return the start of the formatted log message (not counting the
+        prefix to add to each line).
+        """
+        if levelno < logging.WARNING:
+            return ""
+        if formatted.startswith(DEPRECATION_MSG_PREFIX):
+            # Then the message already has a prefix.  We don't want it to
+            # look like "WARNING: DEPRECATION: ...."
+            return ""
+        if levelno < logging.ERROR:
+            return "WARNING: "
+
+        return "ERROR: "
+
+    def format(self, record: logging.LogRecord) -> str:
+        """
+        Calls the standard formatter, but will indent all of the log message
+        lines by our current indentation level.
+        """
+        formatted = super().format(record)
+        message_start = self.get_message_start(formatted, record.levelno)
+        formatted = message_start + formatted
+
+        prefix = ""
+        if self.add_timestamp:
+            prefix = f"{self.formatTime(record)} "
+        prefix += " " * get_indentation()
+        formatted = "".join([prefix + line for line in formatted.splitlines(True)])
+        return formatted
+
+
+@dataclass
+class IndentedRenderable:
+    renderable: RenderableType
+    indent: int
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        segments = console.render(self.renderable, options)
+        lines = Segment.split_lines(segments)
+        for line in lines:
+            yield Segment(" " * self.indent)
+            yield from line
+            yield Segment("\n")
+
+
+class RichPipStreamHandler(RichHandler):
+    KEYWORDS: ClassVar[Optional[List[str]]] = []
+
+    def __init__(self, stream: Optional[TextIO], no_color: bool) -> None:
+        super().__init__(
+            console=Console(file=stream, no_color=no_color, soft_wrap=True),
+            show_time=False,
+            show_level=False,
+            show_path=False,
+            highlighter=NullHighlighter(),
+        )
+
+    # Our custom override on Rich's logger, to make things work as we need them to.
+    def emit(self, record: logging.LogRecord) -> None:
+        style: Optional[Style] = None
+
+        # If we are given a diagnostic error to present, present it with indentation.
+        assert isinstance(record.args, tuple)
+        if record.msg == "[present-rich] %s" and len(record.args) == 1:
+            rich_renderable = record.args[0]
+            assert isinstance(
+                rich_renderable, (ConsoleRenderable, RichCast, str)
+            ), f"{rich_renderable} is not rich-console-renderable"
+
+            renderable: RenderableType = IndentedRenderable(
+                rich_renderable, indent=get_indentation()
+            )
+        else:
+            message = self.format(record)
+            renderable = self.render_message(record, message)
+            if record.levelno is not None:
+                if record.levelno >= logging.ERROR:
+                    style = Style(color="red")
+                elif record.levelno >= logging.WARNING:
+                    style = Style(color="yellow")
+
+        try:
+            self.console.print(renderable, overflow="ignore", crop=False, style=style)
+        except Exception:
+            self.handleError(record)
+
+    def handleError(self, record: logging.LogRecord) -> None:
+        """Called when logging is unable to log some output."""
+
+        exc_class, exc = sys.exc_info()[:2]
+        # If a broken pipe occurred while calling write() or flush() on the
+        # stdout stream in logging's Handler.emit(), then raise our special
+        # exception so we can handle it in main() instead of logging the
+        # broken pipe error and continuing.
+        if (
+            exc_class
+            and exc
+            and self.console.file is sys.stdout
+            and _is_broken_pipe_error(exc_class, exc)
+        ):
+            raise BrokenStdoutLoggingError()
+
+        return super().handleError(record)
+
+
+class BetterRotatingFileHandler(logging.handlers.RotatingFileHandler):
+    def _open(self) -> TextIOWrapper:
+        ensure_dir(os.path.dirname(self.baseFilename))
+        return super()._open()
+
+
+class MaxLevelFilter(Filter):
+    def __init__(self, level: int) -> None:
+        self.level = level
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        return record.levelno < self.level
+
+
+class ExcludeLoggerFilter(Filter):
+
+    """
+    A logging Filter that excludes records from a logger (or its children).
+    """
+
+    def filter(self, record: logging.LogRecord) -> bool:
+        # The base Filter class allows only records from a logger (or its
+        # children).
+        return not super().filter(record)
+
+
+def setup_logging(verbosity: int, no_color: bool, user_log_file: Optional[str]) -> int:
+    """Configures and sets up all of the logging
+
+    Returns the requested logging level, as its integer value.
+    """
+
+    # Determine the level to be logging at.
+    if verbosity >= 2:
+        level_number = logging.DEBUG
+    elif verbosity == 1:
+        level_number = VERBOSE
+    elif verbosity == -1:
+        level_number = logging.WARNING
+    elif verbosity == -2:
+        level_number = logging.ERROR
+    elif verbosity <= -3:
+        level_number = logging.CRITICAL
+    else:
+        level_number = logging.INFO
+
+    level = logging.getLevelName(level_number)
+
+    # The "root" logger should match the "console" level *unless* we also need
+    # to log to a user log file.
+    include_user_log = user_log_file is not None
+    if include_user_log:
+        additional_log_file = user_log_file
+        root_level = "DEBUG"
+    else:
+        additional_log_file = "/dev/null"
+        root_level = level
+
+    # Disable any logging besides WARNING unless we have DEBUG level logging
+    # enabled for vendored libraries.
+    vendored_log_level = "WARNING" if level in ["INFO", "ERROR"] else "DEBUG"
+
+    # Shorthands for clarity
+    log_streams = {
+        "stdout": "ext://sys.stdout",
+        "stderr": "ext://sys.stderr",
+    }
+    handler_classes = {
+        "stream": "pip._internal.utils.logging.RichPipStreamHandler",
+        "file": "pip._internal.utils.logging.BetterRotatingFileHandler",
+    }
+    handlers = ["console", "console_errors", "console_subprocess"] + (
+        ["user_log"] if include_user_log else []
+    )
+
+    logging.config.dictConfig(
+        {
+            "version": 1,
+            "disable_existing_loggers": False,
+            "filters": {
+                "exclude_warnings": {
+                    "()": "pip._internal.utils.logging.MaxLevelFilter",
+                    "level": logging.WARNING,
+                },
+                "restrict_to_subprocess": {
+                    "()": "logging.Filter",
+                    "name": subprocess_logger.name,
+                },
+                "exclude_subprocess": {
+                    "()": "pip._internal.utils.logging.ExcludeLoggerFilter",
+                    "name": subprocess_logger.name,
+                },
+            },
+            "formatters": {
+                "indent": {
+                    "()": IndentingFormatter,
+                    "format": "%(message)s",
+                },
+                "indent_with_timestamp": {
+                    "()": IndentingFormatter,
+                    "format": "%(message)s",
+                    "add_timestamp": True,
+                },
+            },
+            "handlers": {
+                "console": {
+                    "level": level,
+                    "class": handler_classes["stream"],
+                    "no_color": no_color,
+                    "stream": log_streams["stdout"],
+                    "filters": ["exclude_subprocess", "exclude_warnings"],
+                    "formatter": "indent",
+                },
+                "console_errors": {
+                    "level": "WARNING",
+                    "class": handler_classes["stream"],
+                    "no_color": no_color,
+                    "stream": log_streams["stderr"],
+                    "filters": ["exclude_subprocess"],
+                    "formatter": "indent",
+                },
+                # A handler responsible for logging to the console messages
+                # from the "subprocessor" logger.
+                "console_subprocess": {
+                    "level": level,
+                    "class": handler_classes["stream"],
+                    "stream": log_streams["stderr"],
+                    "no_color": no_color,
+                    "filters": ["restrict_to_subprocess"],
+                    "formatter": "indent",
+                },
+                "user_log": {
+                    "level": "DEBUG",
+                    "class": handler_classes["file"],
+                    "filename": additional_log_file,
+                    "encoding": "utf-8",
+                    "delay": True,
+                    "formatter": "indent_with_timestamp",
+                },
+            },
+            "root": {
+                "level": root_level,
+                "handlers": handlers,
+            },
+            "loggers": {"pip._vendor": {"level": vendored_log_level}},
+        }
+    )
+
+    return level_number
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/misc.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/misc.py
new file mode 100644
index 0000000..a8f4cb5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/misc.py
@@ -0,0 +1,723 @@
+# The following comment should be removed at some point in the future.
+# mypy: strict-optional=False
+
+import contextlib
+import errno
+import getpass
+import hashlib
+import io
+import logging
+import os
+import posixpath
+import shutil
+import stat
+import sys
+import urllib.parse
+from io import StringIO
+from itertools import filterfalse, tee, zip_longest
+from types import TracebackType
+from typing import (
+    Any,
+    BinaryIO,
+    Callable,
+    ContextManager,
+    Dict,
+    Generator,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    TextIO,
+    Tuple,
+    Type,
+    TypeVar,
+    cast,
+)
+
+from pip._vendor.pep517 import Pep517HookCaller
+from pip._vendor.tenacity import retry, stop_after_delay, wait_fixed
+
+from pip import __version__
+from pip._internal.exceptions import CommandError
+from pip._internal.locations import get_major_minor_version
+from pip._internal.utils.compat import WINDOWS
+from pip._internal.utils.virtualenv import running_under_virtualenv
+
+__all__ = [
+    "rmtree",
+    "display_path",
+    "backup_dir",
+    "ask",
+    "splitext",
+    "format_size",
+    "is_installable_dir",
+    "normalize_path",
+    "renames",
+    "get_prog",
+    "captured_stdout",
+    "ensure_dir",
+    "remove_auth_from_url",
+    "ConfiguredPep517HookCaller",
+]
+
+
+logger = logging.getLogger(__name__)
+
+T = TypeVar("T")
+ExcInfo = Tuple[Type[BaseException], BaseException, TracebackType]
+VersionInfo = Tuple[int, int, int]
+NetlocTuple = Tuple[str, Tuple[Optional[str], Optional[str]]]
+
+
+def get_pip_version() -> str:
+    pip_pkg_dir = os.path.join(os.path.dirname(__file__), "..", "..")
+    pip_pkg_dir = os.path.abspath(pip_pkg_dir)
+
+    return "pip {} from {} (python {})".format(
+        __version__,
+        pip_pkg_dir,
+        get_major_minor_version(),
+    )
+
+
+def normalize_version_info(py_version_info: Tuple[int, ...]) -> Tuple[int, int, int]:
+    """
+    Convert a tuple of ints representing a Python version to one of length
+    three.
+
+    :param py_version_info: a tuple of ints representing a Python version,
+        or None to specify no version. The tuple can have any length.
+
+    :return: a tuple of length three if `py_version_info` is non-None.
+        Otherwise, return `py_version_info` unchanged (i.e. None).
+    """
+    if len(py_version_info) < 3:
+        py_version_info += (3 - len(py_version_info)) * (0,)
+    elif len(py_version_info) > 3:
+        py_version_info = py_version_info[:3]
+
+    return cast("VersionInfo", py_version_info)
+
+
+def ensure_dir(path: str) -> None:
+    """os.path.makedirs without EEXIST."""
+    try:
+        os.makedirs(path)
+    except OSError as e:
+        # Windows can raise spurious ENOTEMPTY errors. See #6426.
+        if e.errno != errno.EEXIST and e.errno != errno.ENOTEMPTY:
+            raise
+
+
+def get_prog() -> str:
+    try:
+        prog = os.path.basename(sys.argv[0])
+        if prog in ("__main__.py", "-c"):
+            return f"{sys.executable} -m pip"
+        else:
+            return prog
+    except (AttributeError, TypeError, IndexError):
+        pass
+    return "pip"
+
+
+# Retry every half second for up to 3 seconds
+# Tenacity raises RetryError by default, explicitly raise the original exception
+@retry(reraise=True, stop=stop_after_delay(3), wait=wait_fixed(0.5))
+def rmtree(dir: str, ignore_errors: bool = False) -> None:
+    shutil.rmtree(dir, ignore_errors=ignore_errors, onerror=rmtree_errorhandler)
+
+
+def rmtree_errorhandler(func: Callable[..., Any], path: str, exc_info: ExcInfo) -> None:
+    """On Windows, the files in .svn are read-only, so when rmtree() tries to
+    remove them, an exception is thrown.  We catch that here, remove the
+    read-only attribute, and hopefully continue without problems."""
+    try:
+        has_attr_readonly = not (os.stat(path).st_mode & stat.S_IWRITE)
+    except OSError:
+        # it's equivalent to os.path.exists
+        return
+
+    if has_attr_readonly:
+        # convert to read/write
+        os.chmod(path, stat.S_IWRITE)
+        # use the original function to repeat the operation
+        func(path)
+        return
+    else:
+        raise
+
+
+def display_path(path: str) -> str:
+    """Gives the display value for a given path, making it relative to cwd
+    if possible."""
+    path = os.path.normcase(os.path.abspath(path))
+    if path.startswith(os.getcwd() + os.path.sep):
+        path = "." + path[len(os.getcwd()) :]
+    return path
+
+
+def backup_dir(dir: str, ext: str = ".bak") -> str:
+    """Figure out the name of a directory to back up the given dir to
+    (adding .bak, .bak2, etc)"""
+    n = 1
+    extension = ext
+    while os.path.exists(dir + extension):
+        n += 1
+        extension = ext + str(n)
+    return dir + extension
+
+
+def ask_path_exists(message: str, options: Iterable[str]) -> str:
+    for action in os.environ.get("PIP_EXISTS_ACTION", "").split():
+        if action in options:
+            return action
+    return ask(message, options)
+
+
+def _check_no_input(message: str) -> None:
+    """Raise an error if no input is allowed."""
+    if os.environ.get("PIP_NO_INPUT"):
+        raise Exception(
+            f"No input was expected ($PIP_NO_INPUT set); question: {message}"
+        )
+
+
+def ask(message: str, options: Iterable[str]) -> str:
+    """Ask the message interactively, with the given possible responses"""
+    while 1:
+        _check_no_input(message)
+        response = input(message)
+        response = response.strip().lower()
+        if response not in options:
+            print(
+                "Your response ({!r}) was not one of the expected responses: "
+                "{}".format(response, ", ".join(options))
+            )
+        else:
+            return response
+
+
+def ask_input(message: str) -> str:
+    """Ask for input interactively."""
+    _check_no_input(message)
+    return input(message)
+
+
+def ask_password(message: str) -> str:
+    """Ask for a password interactively."""
+    _check_no_input(message)
+    return getpass.getpass(message)
+
+
+def strtobool(val: str) -> int:
+    """Convert a string representation of truth to true (1) or false (0).
+
+    True values are 'y', 'yes', 't', 'true', 'on', and '1'; false values
+    are 'n', 'no', 'f', 'false', 'off', and '0'.  Raises ValueError if
+    'val' is anything else.
+    """
+    val = val.lower()
+    if val in ("y", "yes", "t", "true", "on", "1"):
+        return 1
+    elif val in ("n", "no", "f", "false", "off", "0"):
+        return 0
+    else:
+        raise ValueError(f"invalid truth value {val!r}")
+
+
+def format_size(bytes: float) -> str:
+    if bytes > 1000 * 1000:
+        return "{:.1f} MB".format(bytes / 1000.0 / 1000)
+    elif bytes > 10 * 1000:
+        return "{} kB".format(int(bytes / 1000))
+    elif bytes > 1000:
+        return "{:.1f} kB".format(bytes / 1000.0)
+    else:
+        return "{} bytes".format(int(bytes))
+
+
+def tabulate(rows: Iterable[Iterable[Any]]) -> Tuple[List[str], List[int]]:
+    """Return a list of formatted rows and a list of column sizes.
+
+    For example::
+
+    >>> tabulate([['foobar', 2000], [0xdeadbeef]])
+    (['foobar     2000', '3735928559'], [10, 4])
+    """
+    rows = [tuple(map(str, row)) for row in rows]
+    sizes = [max(map(len, col)) for col in zip_longest(*rows, fillvalue="")]
+    table = [" ".join(map(str.ljust, row, sizes)).rstrip() for row in rows]
+    return table, sizes
+
+
+def is_installable_dir(path: str) -> bool:
+    """Is path is a directory containing pyproject.toml or setup.py?
+
+    If pyproject.toml exists, this is a PEP 517 project. Otherwise we look for
+    a legacy setuptools layout by identifying setup.py. We don't check for the
+    setup.cfg because using it without setup.py is only available for PEP 517
+    projects, which are already covered by the pyproject.toml check.
+    """
+    if not os.path.isdir(path):
+        return False
+    if os.path.isfile(os.path.join(path, "pyproject.toml")):
+        return True
+    if os.path.isfile(os.path.join(path, "setup.py")):
+        return True
+    return False
+
+
+def read_chunks(
+    file: BinaryIO, size: int = io.DEFAULT_BUFFER_SIZE
+) -> Generator[bytes, None, None]:
+    """Yield pieces of data from a file-like object until EOF."""
+    while True:
+        chunk = file.read(size)
+        if not chunk:
+            break
+        yield chunk
+
+
+def normalize_path(path: str, resolve_symlinks: bool = True) -> str:
+    """
+    Convert a path to its canonical, case-normalized, absolute version.
+
+    """
+    path = os.path.expanduser(path)
+    if resolve_symlinks:
+        path = os.path.realpath(path)
+    else:
+        path = os.path.abspath(path)
+    return os.path.normcase(path)
+
+
+def splitext(path: str) -> Tuple[str, str]:
+    """Like os.path.splitext, but take off .tar too"""
+    base, ext = posixpath.splitext(path)
+    if base.lower().endswith(".tar"):
+        ext = base[-4:] + ext
+        base = base[:-4]
+    return base, ext
+
+
+def renames(old: str, new: str) -> None:
+    """Like os.renames(), but handles renaming across devices."""
+    # Implementation borrowed from os.renames().
+    head, tail = os.path.split(new)
+    if head and tail and not os.path.exists(head):
+        os.makedirs(head)
+
+    shutil.move(old, new)
+
+    head, tail = os.path.split(old)
+    if head and tail:
+        try:
+            os.removedirs(head)
+        except OSError:
+            pass
+
+
+def is_local(path: str) -> bool:
+    """
+    Return True if path is within sys.prefix, if we're running in a virtualenv.
+
+    If we're not in a virtualenv, all paths are considered "local."
+
+    Caution: this function assumes the head of path has been normalized
+    with normalize_path.
+    """
+    if not running_under_virtualenv():
+        return True
+    return path.startswith(normalize_path(sys.prefix))
+
+
+def write_output(msg: Any, *args: Any) -> None:
+    logger.info(msg, *args)
+
+
+class StreamWrapper(StringIO):
+    orig_stream: TextIO = None
+
+    @classmethod
+    def from_stream(cls, orig_stream: TextIO) -> "StreamWrapper":
+        cls.orig_stream = orig_stream
+        return cls()
+
+    # compileall.compile_dir() needs stdout.encoding to print to stdout
+    # https://github.com/python/mypy/issues/4125
+    @property
+    def encoding(self):  # type: ignore
+        return self.orig_stream.encoding
+
+
+@contextlib.contextmanager
+def captured_output(stream_name: str) -> Generator[StreamWrapper, None, None]:
+    """Return a context manager used by captured_stdout/stdin/stderr
+    that temporarily replaces the sys stream *stream_name* with a StringIO.
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    orig_stdout = getattr(sys, stream_name)
+    setattr(sys, stream_name, StreamWrapper.from_stream(orig_stdout))
+    try:
+        yield getattr(sys, stream_name)
+    finally:
+        setattr(sys, stream_name, orig_stdout)
+
+
+def captured_stdout() -> ContextManager[StreamWrapper]:
+    """Capture the output of sys.stdout:
+
+       with captured_stdout() as stdout:
+           print('hello')
+       self.assertEqual(stdout.getvalue(), 'hello\n')
+
+    Taken from Lib/support/__init__.py in the CPython repo.
+    """
+    return captured_output("stdout")
+
+
+def captured_stderr() -> ContextManager[StreamWrapper]:
+    """
+    See captured_stdout().
+    """
+    return captured_output("stderr")
+
+
+# Simulates an enum
+def enum(*sequential: Any, **named: Any) -> Type[Any]:
+    enums = dict(zip(sequential, range(len(sequential))), **named)
+    reverse = {value: key for key, value in enums.items()}
+    enums["reverse_mapping"] = reverse
+    return type("Enum", (), enums)
+
+
+def build_netloc(host: str, port: Optional[int]) -> str:
+    """
+    Build a netloc from a host-port pair
+    """
+    if port is None:
+        return host
+    if ":" in host:
+        # Only wrap host with square brackets when it is IPv6
+        host = f"[{host}]"
+    return f"{host}:{port}"
+
+
+def build_url_from_netloc(netloc: str, scheme: str = "https") -> str:
+    """
+    Build a full URL from a netloc.
+    """
+    if netloc.count(":") >= 2 and "@" not in netloc and "[" not in netloc:
+        # It must be a bare IPv6 address, so wrap it with brackets.
+        netloc = f"[{netloc}]"
+    return f"{scheme}://{netloc}"
+
+
+def parse_netloc(netloc: str) -> Tuple[str, Optional[int]]:
+    """
+    Return the host-port pair from a netloc.
+    """
+    url = build_url_from_netloc(netloc)
+    parsed = urllib.parse.urlparse(url)
+    return parsed.hostname, parsed.port
+
+
+def split_auth_from_netloc(netloc: str) -> NetlocTuple:
+    """
+    Parse out and remove the auth information from a netloc.
+
+    Returns: (netloc, (username, password)).
+    """
+    if "@" not in netloc:
+        return netloc, (None, None)
+
+    # Split from the right because that's how urllib.parse.urlsplit()
+    # behaves if more than one @ is present (which can be checked using
+    # the password attribute of urlsplit()'s return value).
+    auth, netloc = netloc.rsplit("@", 1)
+    pw: Optional[str] = None
+    if ":" in auth:
+        # Split from the left because that's how urllib.parse.urlsplit()
+        # behaves if more than one : is present (which again can be checked
+        # using the password attribute of the return value)
+        user, pw = auth.split(":", 1)
+    else:
+        user, pw = auth, None
+
+    user = urllib.parse.unquote(user)
+    if pw is not None:
+        pw = urllib.parse.unquote(pw)
+
+    return netloc, (user, pw)
+
+
+def redact_netloc(netloc: str) -> str:
+    """
+    Replace the sensitive data in a netloc with "****", if it exists.
+
+    For example:
+        - "user:pass@example.com" returns "user:****@example.com"
+        - "accesstoken@example.com" returns "****@example.com"
+    """
+    netloc, (user, password) = split_auth_from_netloc(netloc)
+    if user is None:
+        return netloc
+    if password is None:
+        user = "****"
+        password = ""
+    else:
+        user = urllib.parse.quote(user)
+        password = ":****"
+    return "{user}{password}@{netloc}".format(
+        user=user, password=password, netloc=netloc
+    )
+
+
+def _transform_url(
+    url: str, transform_netloc: Callable[[str], Tuple[Any, ...]]
+) -> Tuple[str, NetlocTuple]:
+    """Transform and replace netloc in a url.
+
+    transform_netloc is a function taking the netloc and returning a
+    tuple. The first element of this tuple is the new netloc. The
+    entire tuple is returned.
+
+    Returns a tuple containing the transformed url as item 0 and the
+    original tuple returned by transform_netloc as item 1.
+    """
+    purl = urllib.parse.urlsplit(url)
+    netloc_tuple = transform_netloc(purl.netloc)
+    # stripped url
+    url_pieces = (purl.scheme, netloc_tuple[0], purl.path, purl.query, purl.fragment)
+    surl = urllib.parse.urlunsplit(url_pieces)
+    return surl, cast("NetlocTuple", netloc_tuple)
+
+
+def _get_netloc(netloc: str) -> NetlocTuple:
+    return split_auth_from_netloc(netloc)
+
+
+def _redact_netloc(netloc: str) -> Tuple[str]:
+    return (redact_netloc(netloc),)
+
+
+def split_auth_netloc_from_url(url: str) -> Tuple[str, str, Tuple[str, str]]:
+    """
+    Parse a url into separate netloc, auth, and url with no auth.
+
+    Returns: (url_without_auth, netloc, (username, password))
+    """
+    url_without_auth, (netloc, auth) = _transform_url(url, _get_netloc)
+    return url_without_auth, netloc, auth
+
+
+def remove_auth_from_url(url: str) -> str:
+    """Return a copy of url with 'username:password@' removed."""
+    # username/pass params are passed to subversion through flags
+    # and are not recognized in the url.
+    return _transform_url(url, _get_netloc)[0]
+
+
+def redact_auth_from_url(url: str) -> str:
+    """Replace the password in a given url with ****."""
+    return _transform_url(url, _redact_netloc)[0]
+
+
+class HiddenText:
+    def __init__(self, secret: str, redacted: str) -> None:
+        self.secret = secret
+        self.redacted = redacted
+
+    def __repr__(self) -> str:
+        return "<HiddenText {!r}>".format(str(self))
+
+    def __str__(self) -> str:
+        return self.redacted
+
+    # This is useful for testing.
+    def __eq__(self, other: Any) -> bool:
+        if type(self) != type(other):
+            return False
+
+        # The string being used for redaction doesn't also have to match,
+        # just the raw, original string.
+        return self.secret == other.secret
+
+
+def hide_value(value: str) -> HiddenText:
+    return HiddenText(value, redacted="****")
+
+
+def hide_url(url: str) -> HiddenText:
+    redacted = redact_auth_from_url(url)
+    return HiddenText(url, redacted=redacted)
+
+
+def protect_pip_from_modification_on_windows(modifying_pip: bool) -> None:
+    """Protection of pip.exe from modification on Windows
+
+    On Windows, any operation modifying pip should be run as:
+        python -m pip ...
+    """
+    pip_names = [
+        "pip",
+        f"pip{sys.version_info.major}",
+        f"pip{sys.version_info.major}.{sys.version_info.minor}",
+    ]
+
+    # See https://github.com/pypa/pip/issues/1299 for more discussion
+    should_show_use_python_msg = (
+        modifying_pip and WINDOWS and os.path.basename(sys.argv[0]) in pip_names
+    )
+
+    if should_show_use_python_msg:
+        new_command = [sys.executable, "-m", "pip"] + sys.argv[1:]
+        raise CommandError(
+            "To modify pip, please run the following command:\n{}".format(
+                " ".join(new_command)
+            )
+        )
+
+
+def is_console_interactive() -> bool:
+    """Is this console interactive?"""
+    return sys.stdin is not None and sys.stdin.isatty()
+
+
+def hash_file(path: str, blocksize: int = 1 << 20) -> Tuple[Any, int]:
+    """Return (hash, length) for path using hashlib.sha256()"""
+
+    h = hashlib.sha256()
+    length = 0
+    with open(path, "rb") as f:
+        for block in read_chunks(f, size=blocksize):
+            length += len(block)
+            h.update(block)
+    return h, length
+
+
+def is_wheel_installed() -> bool:
+    """
+    Return whether the wheel package is installed.
+    """
+    try:
+        import wheel  # noqa: F401
+    except ImportError:
+        return False
+
+    return True
+
+
+def pairwise(iterable: Iterable[Any]) -> Iterator[Tuple[Any, Any]]:
+    """
+    Return paired elements.
+
+    For example:
+        s -> (s0, s1), (s2, s3), (s4, s5), ...
+    """
+    iterable = iter(iterable)
+    return zip_longest(iterable, iterable)
+
+
+def partition(
+    pred: Callable[[T], bool],
+    iterable: Iterable[T],
+) -> Tuple[Iterable[T], Iterable[T]]:
+    """
+    Use a predicate to partition entries into false entries and true entries,
+    like
+
+        partition(is_odd, range(10)) --> 0 2 4 6 8   and  1 3 5 7 9
+    """
+    t1, t2 = tee(iterable)
+    return filterfalse(pred, t1), filter(pred, t2)
+
+
+class ConfiguredPep517HookCaller(Pep517HookCaller):
+    def __init__(
+        self,
+        config_holder: Any,
+        source_dir: str,
+        build_backend: str,
+        backend_path: Optional[str] = None,
+        runner: Optional[Callable[..., None]] = None,
+        python_executable: Optional[str] = None,
+    ):
+        super().__init__(
+            source_dir, build_backend, backend_path, runner, python_executable
+        )
+        self.config_holder = config_holder
+
+    def build_wheel(
+        self,
+        wheel_directory: str,
+        config_settings: Optional[Dict[str, str]] = None,
+        metadata_directory: Optional[str] = None,
+    ) -> str:
+        cs = self.config_holder.config_settings
+        return super().build_wheel(
+            wheel_directory, config_settings=cs, metadata_directory=metadata_directory
+        )
+
+    def build_sdist(
+        self, sdist_directory: str, config_settings: Optional[Dict[str, str]] = None
+    ) -> str:
+        cs = self.config_holder.config_settings
+        return super().build_sdist(sdist_directory, config_settings=cs)
+
+    def build_editable(
+        self,
+        wheel_directory: str,
+        config_settings: Optional[Dict[str, str]] = None,
+        metadata_directory: Optional[str] = None,
+    ) -> str:
+        cs = self.config_holder.config_settings
+        return super().build_editable(
+            wheel_directory, config_settings=cs, metadata_directory=metadata_directory
+        )
+
+    def get_requires_for_build_wheel(
+        self, config_settings: Optional[Dict[str, str]] = None
+    ) -> List[str]:
+        cs = self.config_holder.config_settings
+        return super().get_requires_for_build_wheel(config_settings=cs)
+
+    def get_requires_for_build_sdist(
+        self, config_settings: Optional[Dict[str, str]] = None
+    ) -> List[str]:
+        cs = self.config_holder.config_settings
+        return super().get_requires_for_build_sdist(config_settings=cs)
+
+    def get_requires_for_build_editable(
+        self, config_settings: Optional[Dict[str, str]] = None
+    ) -> List[str]:
+        cs = self.config_holder.config_settings
+        return super().get_requires_for_build_editable(config_settings=cs)
+
+    def prepare_metadata_for_build_wheel(
+        self,
+        metadata_directory: str,
+        config_settings: Optional[Dict[str, str]] = None,
+        _allow_fallback: bool = True,
+    ) -> str:
+        cs = self.config_holder.config_settings
+        return super().prepare_metadata_for_build_wheel(
+            metadata_directory=metadata_directory,
+            config_settings=cs,
+            _allow_fallback=_allow_fallback,
+        )
+
+    def prepare_metadata_for_build_editable(
+        self,
+        metadata_directory: str,
+        config_settings: Optional[Dict[str, str]] = None,
+        _allow_fallback: bool = True,
+    ) -> str:
+        cs = self.config_holder.config_settings
+        return super().prepare_metadata_for_build_editable(
+            metadata_directory=metadata_directory,
+            config_settings=cs,
+            _allow_fallback=_allow_fallback,
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/models.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/models.py
new file mode 100644
index 0000000..b6bb21a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/models.py
@@ -0,0 +1,39 @@
+"""Utilities for defining models
+"""
+
+import operator
+from typing import Any, Callable, Type
+
+
+class KeyBasedCompareMixin:
+    """Provides comparison capabilities that is based on a key"""
+
+    __slots__ = ["_compare_key", "_defining_class"]
+
+    def __init__(self, key: Any, defining_class: Type["KeyBasedCompareMixin"]) -> None:
+        self._compare_key = key
+        self._defining_class = defining_class
+
+    def __hash__(self) -> int:
+        return hash(self._compare_key)
+
+    def __lt__(self, other: Any) -> bool:
+        return self._compare(other, operator.__lt__)
+
+    def __le__(self, other: Any) -> bool:
+        return self._compare(other, operator.__le__)
+
+    def __gt__(self, other: Any) -> bool:
+        return self._compare(other, operator.__gt__)
+
+    def __ge__(self, other: Any) -> bool:
+        return self._compare(other, operator.__ge__)
+
+    def __eq__(self, other: Any) -> bool:
+        return self._compare(other, operator.__eq__)
+
+    def _compare(self, other: Any, method: Callable[[Any, Any], bool]) -> bool:
+        if not isinstance(other, self._defining_class):
+            return NotImplemented
+
+        return method(self._compare_key, other._compare_key)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/packaging.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/packaging.py
new file mode 100644
index 0000000..b9f6af4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/packaging.py
@@ -0,0 +1,57 @@
+import functools
+import logging
+import re
+from typing import NewType, Optional, Tuple, cast
+
+from pip._vendor.packaging import specifiers, version
+from pip._vendor.packaging.requirements import Requirement
+
+NormalizedExtra = NewType("NormalizedExtra", str)
+
+logger = logging.getLogger(__name__)
+
+
+def check_requires_python(
+    requires_python: Optional[str], version_info: Tuple[int, ...]
+) -> bool:
+    """
+    Check if the given Python version matches a "Requires-Python" specifier.
+
+    :param version_info: A 3-tuple of ints representing a Python
+        major-minor-micro version to check (e.g. `sys.version_info[:3]`).
+
+    :return: `True` if the given Python version satisfies the requirement.
+        Otherwise, return `False`.
+
+    :raises InvalidSpecifier: If `requires_python` has an invalid format.
+    """
+    if requires_python is None:
+        # The package provides no information
+        return True
+    requires_python_specifier = specifiers.SpecifierSet(requires_python)
+
+    python_version = version.parse(".".join(map(str, version_info)))
+    return python_version in requires_python_specifier
+
+
+@functools.lru_cache(maxsize=512)
+def get_requirement(req_string: str) -> Requirement:
+    """Construct a packaging.Requirement object with caching"""
+    # Parsing requirement strings is expensive, and is also expected to happen
+    # with a low diversity of different arguments (at least relative the number
+    # constructed). This method adds a cache to requirement object creation to
+    # minimize repeated parsing of the same string to construct equivalent
+    # Requirement objects.
+    return Requirement(req_string)
+
+
+def safe_extra(extra: str) -> NormalizedExtra:
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+
+    This function is duplicated from ``pkg_resources``. Note that this is not
+    the same to either ``canonicalize_name`` or ``_egg_link_name``.
+    """
+    return cast(NormalizedExtra, re.sub("[^A-Za-z0-9.-]+", "_", extra).lower())
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/setuptools_build.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/setuptools_build.py
new file mode 100644
index 0000000..01ef4a4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/setuptools_build.py
@@ -0,0 +1,195 @@
+import sys
+import textwrap
+from typing import List, Optional, Sequence
+
+# Shim to wrap setup.py invocation with setuptools
+# Note that __file__ is handled via two {!r} *and* %r, to ensure that paths on
+# Windows are correctly handled (it should be "C:\\Users" not "C:\Users").
+_SETUPTOOLS_SHIM = textwrap.dedent(
+    """
+    exec(compile('''
+    # This is <pip-setuptools-caller> -- a caller that pip uses to run setup.py
+    #
+    # - It imports setuptools before invoking setup.py, to enable projects that directly
+    #   import from `distutils.core` to work with newer packaging standards.
+    # - It provides a clear error message when setuptools is not installed.
+    # - It sets `sys.argv[0]` to the underlying `setup.py`, when invoking `setup.py` so
+    #   setuptools doesn't think the script is `-c`. This avoids the following warning:
+    #     manifest_maker: standard file '-c' not found".
+    # - It generates a shim setup.py, for handling setup.cfg-only projects.
+    import os, sys, tokenize
+
+    try:
+        import setuptools
+    except ImportError as error:
+        print(
+            "ERROR: Can not execute `setup.py` since setuptools is not available in "
+            "the build environment.",
+            file=sys.stderr,
+        )
+        sys.exit(1)
+
+    __file__ = %r
+    sys.argv[0] = __file__
+
+    if os.path.exists(__file__):
+        filename = __file__
+        with tokenize.open(__file__) as f:
+            setup_py_code = f.read()
+    else:
+        filename = "<auto-generated setuptools caller>"
+        setup_py_code = "from setuptools import setup; setup()"
+
+    exec(compile(setup_py_code, filename, "exec"))
+    ''' % ({!r},), "<pip-setuptools-caller>", "exec"))
+    """
+).rstrip()
+
+
+def make_setuptools_shim_args(
+    setup_py_path: str,
+    global_options: Optional[Sequence[str]] = None,
+    no_user_config: bool = False,
+    unbuffered_output: bool = False,
+) -> List[str]:
+    """
+    Get setuptools command arguments with shim wrapped setup file invocation.
+
+    :param setup_py_path: The path to setup.py to be wrapped.
+    :param global_options: Additional global options.
+    :param no_user_config: If True, disables personal user configuration.
+    :param unbuffered_output: If True, adds the unbuffered switch to the
+     argument list.
+    """
+    args = [sys.executable]
+    if unbuffered_output:
+        args += ["-u"]
+    args += ["-c", _SETUPTOOLS_SHIM.format(setup_py_path)]
+    if global_options:
+        args += global_options
+    if no_user_config:
+        args += ["--no-user-cfg"]
+    return args
+
+
+def make_setuptools_bdist_wheel_args(
+    setup_py_path: str,
+    global_options: Sequence[str],
+    build_options: Sequence[str],
+    destination_dir: str,
+) -> List[str]:
+    # NOTE: Eventually, we'd want to also -S to the flags here, when we're
+    # isolating. Currently, it breaks Python in virtualenvs, because it
+    # relies on site.py to find parts of the standard library outside the
+    # virtualenv.
+    args = make_setuptools_shim_args(
+        setup_py_path, global_options=global_options, unbuffered_output=True
+    )
+    args += ["bdist_wheel", "-d", destination_dir]
+    args += build_options
+    return args
+
+
+def make_setuptools_clean_args(
+    setup_py_path: str,
+    global_options: Sequence[str],
+) -> List[str]:
+    args = make_setuptools_shim_args(
+        setup_py_path, global_options=global_options, unbuffered_output=True
+    )
+    args += ["clean", "--all"]
+    return args
+
+
+def make_setuptools_develop_args(
+    setup_py_path: str,
+    global_options: Sequence[str],
+    install_options: Sequence[str],
+    no_user_config: bool,
+    prefix: Optional[str],
+    home: Optional[str],
+    use_user_site: bool,
+) -> List[str]:
+    assert not (use_user_site and prefix)
+
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        no_user_config=no_user_config,
+    )
+
+    args += ["develop", "--no-deps"]
+
+    args += install_options
+
+    if prefix:
+        args += ["--prefix", prefix]
+    if home is not None:
+        args += ["--install-dir", home]
+
+    if use_user_site:
+        args += ["--user", "--prefix="]
+
+    return args
+
+
+def make_setuptools_egg_info_args(
+    setup_py_path: str,
+    egg_info_dir: Optional[str],
+    no_user_config: bool,
+) -> List[str]:
+    args = make_setuptools_shim_args(setup_py_path, no_user_config=no_user_config)
+
+    args += ["egg_info"]
+
+    if egg_info_dir:
+        args += ["--egg-base", egg_info_dir]
+
+    return args
+
+
+def make_setuptools_install_args(
+    setup_py_path: str,
+    global_options: Sequence[str],
+    install_options: Sequence[str],
+    record_filename: str,
+    root: Optional[str],
+    prefix: Optional[str],
+    header_dir: Optional[str],
+    home: Optional[str],
+    use_user_site: bool,
+    no_user_config: bool,
+    pycompile: bool,
+) -> List[str]:
+    assert not (use_user_site and prefix)
+    assert not (use_user_site and root)
+
+    args = make_setuptools_shim_args(
+        setup_py_path,
+        global_options=global_options,
+        no_user_config=no_user_config,
+        unbuffered_output=True,
+    )
+    args += ["install", "--record", record_filename]
+    args += ["--single-version-externally-managed"]
+
+    if root is not None:
+        args += ["--root", root]
+    if prefix is not None:
+        args += ["--prefix", prefix]
+    if home is not None:
+        args += ["--home", home]
+    if use_user_site:
+        args += ["--user", "--prefix="]
+
+    if pycompile:
+        args += ["--compile"]
+    else:
+        args += ["--no-compile"]
+
+    if header_dir:
+        args += ["--install-headers", header_dir]
+
+    args += install_options
+
+    return args
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/subprocess.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/subprocess.py
new file mode 100644
index 0000000..cf5bf6b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/subprocess.py
@@ -0,0 +1,260 @@
+import logging
+import os
+import shlex
+import subprocess
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Iterable,
+    List,
+    Mapping,
+    Optional,
+    Union,
+)
+
+from pip._vendor.rich.markup import escape
+
+from pip._internal.cli.spinners import SpinnerInterface, open_spinner
+from pip._internal.exceptions import InstallationSubprocessError
+from pip._internal.utils.logging import VERBOSE, subprocess_logger
+from pip._internal.utils.misc import HiddenText
+
+if TYPE_CHECKING:
+    # Literal was introduced in Python 3.8.
+    #
+    # TODO: Remove `if TYPE_CHECKING` when dropping support for Python 3.7.
+    from typing import Literal
+
+CommandArgs = List[Union[str, HiddenText]]
+
+
+def make_command(*args: Union[str, HiddenText, CommandArgs]) -> CommandArgs:
+    """
+    Create a CommandArgs object.
+    """
+    command_args: CommandArgs = []
+    for arg in args:
+        # Check for list instead of CommandArgs since CommandArgs is
+        # only known during type-checking.
+        if isinstance(arg, list):
+            command_args.extend(arg)
+        else:
+            # Otherwise, arg is str or HiddenText.
+            command_args.append(arg)
+
+    return command_args
+
+
+def format_command_args(args: Union[List[str], CommandArgs]) -> str:
+    """
+    Format command arguments for display.
+    """
+    # For HiddenText arguments, display the redacted form by calling str().
+    # Also, we don't apply str() to arguments that aren't HiddenText since
+    # this can trigger a UnicodeDecodeError in Python 2 if the argument
+    # has type unicode and includes a non-ascii character.  (The type
+    # checker doesn't ensure the annotations are correct in all cases.)
+    return " ".join(
+        shlex.quote(str(arg)) if isinstance(arg, HiddenText) else shlex.quote(arg)
+        for arg in args
+    )
+
+
+def reveal_command_args(args: Union[List[str], CommandArgs]) -> List[str]:
+    """
+    Return the arguments in their raw, unredacted form.
+    """
+    return [arg.secret if isinstance(arg, HiddenText) else arg for arg in args]
+
+
+def call_subprocess(
+    cmd: Union[List[str], CommandArgs],
+    show_stdout: bool = False,
+    cwd: Optional[str] = None,
+    on_returncode: 'Literal["raise", "warn", "ignore"]' = "raise",
+    extra_ok_returncodes: Optional[Iterable[int]] = None,
+    extra_environ: Optional[Mapping[str, Any]] = None,
+    unset_environ: Optional[Iterable[str]] = None,
+    spinner: Optional[SpinnerInterface] = None,
+    log_failed_cmd: Optional[bool] = True,
+    stdout_only: Optional[bool] = False,
+    *,
+    command_desc: str,
+) -> str:
+    """
+    Args:
+      show_stdout: if true, use INFO to log the subprocess's stderr and
+        stdout streams.  Otherwise, use DEBUG.  Defaults to False.
+      extra_ok_returncodes: an iterable of integer return codes that are
+        acceptable, in addition to 0. Defaults to None, which means [].
+      unset_environ: an iterable of environment variable names to unset
+        prior to calling subprocess.Popen().
+      log_failed_cmd: if false, failed commands are not logged, only raised.
+      stdout_only: if true, return only stdout, else return both. When true,
+        logging of both stdout and stderr occurs when the subprocess has
+        terminated, else logging occurs as subprocess output is produced.
+    """
+    if extra_ok_returncodes is None:
+        extra_ok_returncodes = []
+    if unset_environ is None:
+        unset_environ = []
+    # Most places in pip use show_stdout=False. What this means is--
+    #
+    # - We connect the child's output (combined stderr and stdout) to a
+    #   single pipe, which we read.
+    # - We log this output to stderr at DEBUG level as it is received.
+    # - If DEBUG logging isn't enabled (e.g. if --verbose logging wasn't
+    #   requested), then we show a spinner so the user can still see the
+    #   subprocess is in progress.
+    # - If the subprocess exits with an error, we log the output to stderr
+    #   at ERROR level if it hasn't already been displayed to the console
+    #   (e.g. if --verbose logging wasn't enabled).  This way we don't log
+    #   the output to the console twice.
+    #
+    # If show_stdout=True, then the above is still done, but with DEBUG
+    # replaced by INFO.
+    if show_stdout:
+        # Then log the subprocess output at INFO level.
+        log_subprocess: Callable[..., None] = subprocess_logger.info
+        used_level = logging.INFO
+    else:
+        # Then log the subprocess output using VERBOSE.  This also ensures
+        # it will be logged to the log file (aka user_log), if enabled.
+        log_subprocess = subprocess_logger.verbose
+        used_level = VERBOSE
+
+    # Whether the subprocess will be visible in the console.
+    showing_subprocess = subprocess_logger.getEffectiveLevel() <= used_level
+
+    # Only use the spinner if we're not showing the subprocess output
+    # and we have a spinner.
+    use_spinner = not showing_subprocess and spinner is not None
+
+    log_subprocess("Running command %s", command_desc)
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+    for name in unset_environ:
+        env.pop(name, None)
+    try:
+        proc = subprocess.Popen(
+            # Convert HiddenText objects to the underlying str.
+            reveal_command_args(cmd),
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT if not stdout_only else subprocess.PIPE,
+            cwd=cwd,
+            env=env,
+            errors="backslashreplace",
+        )
+    except Exception as exc:
+        if log_failed_cmd:
+            subprocess_logger.critical(
+                "Error %s while executing command %s",
+                exc,
+                command_desc,
+            )
+        raise
+    all_output = []
+    if not stdout_only:
+        assert proc.stdout
+        assert proc.stdin
+        proc.stdin.close()
+        # In this mode, stdout and stderr are in the same pipe.
+        while True:
+            line: str = proc.stdout.readline()
+            if not line:
+                break
+            line = line.rstrip()
+            all_output.append(line + "\n")
+
+            # Show the line immediately.
+            log_subprocess(line)
+            # Update the spinner.
+            if use_spinner:
+                assert spinner
+                spinner.spin()
+        try:
+            proc.wait()
+        finally:
+            if proc.stdout:
+                proc.stdout.close()
+        output = "".join(all_output)
+    else:
+        # In this mode, stdout and stderr are in different pipes.
+        # We must use communicate() which is the only safe way to read both.
+        out, err = proc.communicate()
+        # log line by line to preserve pip log indenting
+        for out_line in out.splitlines():
+            log_subprocess(out_line)
+        all_output.append(out)
+        for err_line in err.splitlines():
+            log_subprocess(err_line)
+        all_output.append(err)
+        output = out
+
+    proc_had_error = proc.returncode and proc.returncode not in extra_ok_returncodes
+    if use_spinner:
+        assert spinner
+        if proc_had_error:
+            spinner.finish("error")
+        else:
+            spinner.finish("done")
+    if proc_had_error:
+        if on_returncode == "raise":
+            error = InstallationSubprocessError(
+                command_description=command_desc,
+                exit_code=proc.returncode,
+                output_lines=all_output if not showing_subprocess else None,
+            )
+            if log_failed_cmd:
+                subprocess_logger.error("[present-rich] %s", error)
+                subprocess_logger.verbose(
+                    "[bold magenta]full command[/]: [blue]%s[/]",
+                    escape(format_command_args(cmd)),
+                    extra={"markup": True},
+                )
+                subprocess_logger.verbose(
+                    "[bold magenta]cwd[/]: %s",
+                    escape(cwd or "[inherit]"),
+                    extra={"markup": True},
+                )
+
+            raise error
+        elif on_returncode == "warn":
+            subprocess_logger.warning(
+                'Command "%s" had error code %s in %s',
+                command_desc,
+                proc.returncode,
+                cwd,
+            )
+        elif on_returncode == "ignore":
+            pass
+        else:
+            raise ValueError(f"Invalid value: on_returncode={on_returncode!r}")
+    return output
+
+
+def runner_with_spinner_message(message: str) -> Callable[..., None]:
+    """Provide a subprocess_runner that shows a spinner message.
+
+    Intended for use with for pep517's Pep517HookCaller. Thus, the runner has
+    an API that matches what's expected by Pep517HookCaller.subprocess_runner.
+    """
+
+    def runner(
+        cmd: List[str],
+        cwd: Optional[str] = None,
+        extra_environ: Optional[Mapping[str, Any]] = None,
+    ) -> None:
+        with open_spinner(message) as spinner:
+            call_subprocess(
+                cmd,
+                command_desc=message,
+                cwd=cwd,
+                extra_environ=extra_environ,
+                spinner=spinner,
+            )
+
+    return runner
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/temp_dir.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/temp_dir.py
new file mode 100644
index 0000000..8ee8a1c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/temp_dir.py
@@ -0,0 +1,246 @@
+import errno
+import itertools
+import logging
+import os.path
+import tempfile
+from contextlib import ExitStack, contextmanager
+from typing import Any, Dict, Generator, Optional, TypeVar, Union
+
+from pip._internal.utils.misc import enum, rmtree
+
+logger = logging.getLogger(__name__)
+
+_T = TypeVar("_T", bound="TempDirectory")
+
+
+# Kinds of temporary directories. Only needed for ones that are
+# globally-managed.
+tempdir_kinds = enum(
+    BUILD_ENV="build-env",
+    EPHEM_WHEEL_CACHE="ephem-wheel-cache",
+    REQ_BUILD="req-build",
+)
+
+
+_tempdir_manager: Optional[ExitStack] = None
+
+
+@contextmanager
+def global_tempdir_manager() -> Generator[None, None, None]:
+    global _tempdir_manager
+    with ExitStack() as stack:
+        old_tempdir_manager, _tempdir_manager = _tempdir_manager, stack
+        try:
+            yield
+        finally:
+            _tempdir_manager = old_tempdir_manager
+
+
+class TempDirectoryTypeRegistry:
+    """Manages temp directory behavior"""
+
+    def __init__(self) -> None:
+        self._should_delete: Dict[str, bool] = {}
+
+    def set_delete(self, kind: str, value: bool) -> None:
+        """Indicate whether a TempDirectory of the given kind should be
+        auto-deleted.
+        """
+        self._should_delete[kind] = value
+
+    def get_delete(self, kind: str) -> bool:
+        """Get configured auto-delete flag for a given TempDirectory type,
+        default True.
+        """
+        return self._should_delete.get(kind, True)
+
+
+_tempdir_registry: Optional[TempDirectoryTypeRegistry] = None
+
+
+@contextmanager
+def tempdir_registry() -> Generator[TempDirectoryTypeRegistry, None, None]:
+    """Provides a scoped global tempdir registry that can be used to dictate
+    whether directories should be deleted.
+    """
+    global _tempdir_registry
+    old_tempdir_registry = _tempdir_registry
+    _tempdir_registry = TempDirectoryTypeRegistry()
+    try:
+        yield _tempdir_registry
+    finally:
+        _tempdir_registry = old_tempdir_registry
+
+
+class _Default:
+    pass
+
+
+_default = _Default()
+
+
+class TempDirectory:
+    """Helper class that owns and cleans up a temporary directory.
+
+    This class can be used as a context manager or as an OO representation of a
+    temporary directory.
+
+    Attributes:
+        path
+            Location to the created temporary directory
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    Methods:
+        cleanup()
+            Deletes the temporary directory
+
+    When used as a context manager, if the delete attribute is True, on
+    exiting the context the temporary directory is deleted.
+    """
+
+    def __init__(
+        self,
+        path: Optional[str] = None,
+        delete: Union[bool, None, _Default] = _default,
+        kind: str = "temp",
+        globally_managed: bool = False,
+    ):
+        super().__init__()
+
+        if delete is _default:
+            if path is not None:
+                # If we were given an explicit directory, resolve delete option
+                # now.
+                delete = False
+            else:
+                # Otherwise, we wait until cleanup and see what
+                # tempdir_registry says.
+                delete = None
+
+        # The only time we specify path is in for editables where it
+        # is the value of the --src option.
+        if path is None:
+            path = self._create(kind)
+
+        self._path = path
+        self._deleted = False
+        self.delete = delete
+        self.kind = kind
+
+        if globally_managed:
+            assert _tempdir_manager is not None
+            _tempdir_manager.enter_context(self)
+
+    @property
+    def path(self) -> str:
+        assert not self._deleted, f"Attempted to access deleted path: {self._path}"
+        return self._path
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__} {self.path!r}>"
+
+    def __enter__(self: _T) -> _T:
+        return self
+
+    def __exit__(self, exc: Any, value: Any, tb: Any) -> None:
+        if self.delete is not None:
+            delete = self.delete
+        elif _tempdir_registry:
+            delete = _tempdir_registry.get_delete(self.kind)
+        else:
+            delete = True
+
+        if delete:
+            self.cleanup()
+
+    def _create(self, kind: str) -> str:
+        """Create a temporary directory and store its path in self.path"""
+        # We realpath here because some systems have their default tmpdir
+        # symlinked to another directory.  This tends to confuse build
+        # scripts, so we canonicalize the path by traversing potential
+        # symlinks here.
+        path = os.path.realpath(tempfile.mkdtemp(prefix=f"pip-{kind}-"))
+        logger.debug("Created temporary directory: %s", path)
+        return path
+
+    def cleanup(self) -> None:
+        """Remove the temporary directory created and reset state"""
+        self._deleted = True
+        if not os.path.exists(self._path):
+            return
+        rmtree(self._path)
+
+
+class AdjacentTempDirectory(TempDirectory):
+    """Helper class that creates a temporary directory adjacent to a real one.
+
+    Attributes:
+        original
+            The original directory to create a temp directory for.
+        path
+            After calling create() or entering, contains the full
+            path to the temporary directory.
+        delete
+            Whether the directory should be deleted when exiting
+            (when used as a contextmanager)
+
+    """
+
+    # The characters that may be used to name the temp directory
+    # We always prepend a ~ and then rotate through these until
+    # a usable name is found.
+    # pkg_resources raises a different error for .dist-info folder
+    # with leading '-' and invalid metadata
+    LEADING_CHARS = "-~.=%0123456789"
+
+    def __init__(self, original: str, delete: Optional[bool] = None) -> None:
+        self.original = original.rstrip("/\\")
+        super().__init__(delete=delete)
+
+    @classmethod
+    def _generate_names(cls, name: str) -> Generator[str, None, None]:
+        """Generates a series of temporary names.
+
+        The algorithm replaces the leading characters in the name
+        with ones that are valid filesystem characters, but are not
+        valid package names (for both Python and pip definitions of
+        package).
+        """
+        for i in range(1, len(name)):
+            for candidate in itertools.combinations_with_replacement(
+                cls.LEADING_CHARS, i - 1
+            ):
+                new_name = "~" + "".join(candidate) + name[i:]
+                if new_name != name:
+                    yield new_name
+
+        # If we make it this far, we will have to make a longer name
+        for i in range(len(cls.LEADING_CHARS)):
+            for candidate in itertools.combinations_with_replacement(
+                cls.LEADING_CHARS, i
+            ):
+                new_name = "~" + "".join(candidate) + name
+                if new_name != name:
+                    yield new_name
+
+    def _create(self, kind: str) -> str:
+        root, name = os.path.split(self.original)
+        for candidate in self._generate_names(name):
+            path = os.path.join(root, candidate)
+            try:
+                os.mkdir(path)
+            except OSError as ex:
+                # Continue if the name exists already
+                if ex.errno != errno.EEXIST:
+                    raise
+            else:
+                path = os.path.realpath(path)
+                break
+        else:
+            # Final fallback on the default behavior.
+            path = os.path.realpath(tempfile.mkdtemp(prefix=f"pip-{kind}-"))
+
+        logger.debug("Created temporary directory: %s", path)
+        return path
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/unpacking.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/unpacking.py
new file mode 100644
index 0000000..78b5c13
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/unpacking.py
@@ -0,0 +1,257 @@
+"""Utilities related archives.
+"""
+
+import logging
+import os
+import shutil
+import stat
+import tarfile
+import zipfile
+from typing import Iterable, List, Optional
+from zipfile import ZipInfo
+
+from pip._internal.exceptions import InstallationError
+from pip._internal.utils.filetypes import (
+    BZ2_EXTENSIONS,
+    TAR_EXTENSIONS,
+    XZ_EXTENSIONS,
+    ZIP_EXTENSIONS,
+)
+from pip._internal.utils.misc import ensure_dir
+
+logger = logging.getLogger(__name__)
+
+
+SUPPORTED_EXTENSIONS = ZIP_EXTENSIONS + TAR_EXTENSIONS
+
+try:
+    import bz2  # noqa
+
+    SUPPORTED_EXTENSIONS += BZ2_EXTENSIONS
+except ImportError:
+    logger.debug("bz2 module is not available")
+
+try:
+    # Only for Python 3.3+
+    import lzma  # noqa
+
+    SUPPORTED_EXTENSIONS += XZ_EXTENSIONS
+except ImportError:
+    logger.debug("lzma module is not available")
+
+
+def current_umask() -> int:
+    """Get the current umask which involves having to set it temporarily."""
+    mask = os.umask(0)
+    os.umask(mask)
+    return mask
+
+
+def split_leading_dir(path: str) -> List[str]:
+    path = path.lstrip("/").lstrip("\\")
+    if "/" in path and (
+        ("\\" in path and path.find("/") < path.find("\\")) or "\\" not in path
+    ):
+        return path.split("/", 1)
+    elif "\\" in path:
+        return path.split("\\", 1)
+    else:
+        return [path, ""]
+
+
+def has_leading_dir(paths: Iterable[str]) -> bool:
+    """Returns true if all the paths have the same leading path name
+    (i.e., everything is in one subdirectory in an archive)"""
+    common_prefix = None
+    for path in paths:
+        prefix, rest = split_leading_dir(path)
+        if not prefix:
+            return False
+        elif common_prefix is None:
+            common_prefix = prefix
+        elif prefix != common_prefix:
+            return False
+    return True
+
+
+def is_within_directory(directory: str, target: str) -> bool:
+    """
+    Return true if the absolute path of target is within the directory
+    """
+    abs_directory = os.path.abspath(directory)
+    abs_target = os.path.abspath(target)
+
+    prefix = os.path.commonprefix([abs_directory, abs_target])
+    return prefix == abs_directory
+
+
+def set_extracted_file_to_default_mode_plus_executable(path: str) -> None:
+    """
+    Make file present at path have execute for user/group/world
+    (chmod +x) is no-op on windows per python docs
+    """
+    os.chmod(path, (0o777 & ~current_umask() | 0o111))
+
+
+def zip_item_is_executable(info: ZipInfo) -> bool:
+    mode = info.external_attr >> 16
+    # if mode and regular file and any execute permissions for
+    # user/group/world?
+    return bool(mode and stat.S_ISREG(mode) and mode & 0o111)
+
+
+def unzip_file(filename: str, location: str, flatten: bool = True) -> None:
+    """
+    Unzip the file (with path `filename`) to the destination `location`.  All
+    files are written based on system defaults and umask (i.e. permissions are
+    not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written. Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    zipfp = open(filename, "rb")
+    try:
+        zip = zipfile.ZipFile(zipfp, allowZip64=True)
+        leading = has_leading_dir(zip.namelist()) and flatten
+        for info in zip.infolist():
+            name = info.filename
+            fn = name
+            if leading:
+                fn = split_leading_dir(name)[1]
+            fn = os.path.join(location, fn)
+            dir = os.path.dirname(fn)
+            if not is_within_directory(location, fn):
+                message = (
+                    "The zip file ({}) has a file ({}) trying to install "
+                    "outside target directory ({})"
+                )
+                raise InstallationError(message.format(filename, fn, location))
+            if fn.endswith("/") or fn.endswith("\\"):
+                # A directory
+                ensure_dir(fn)
+            else:
+                ensure_dir(dir)
+                # Don't use read() to avoid allocating an arbitrarily large
+                # chunk of memory for the file's content
+                fp = zip.open(name)
+                try:
+                    with open(fn, "wb") as destfp:
+                        shutil.copyfileobj(fp, destfp)
+                finally:
+                    fp.close()
+                    if zip_item_is_executable(info):
+                        set_extracted_file_to_default_mode_plus_executable(fn)
+    finally:
+        zipfp.close()
+
+
+def untar_file(filename: str, location: str) -> None:
+    """
+    Untar the file (with path `filename`) to the destination `location`.
+    All files are written based on system defaults and umask (i.e. permissions
+    are not preserved), except that regular file members with any execute
+    permissions (user, group, or world) have "chmod +x" applied after being
+    written.  Note that for windows, any execute changes using os.chmod are
+    no-ops per the python docs.
+    """
+    ensure_dir(location)
+    if filename.lower().endswith(".gz") or filename.lower().endswith(".tgz"):
+        mode = "r:gz"
+    elif filename.lower().endswith(BZ2_EXTENSIONS):
+        mode = "r:bz2"
+    elif filename.lower().endswith(XZ_EXTENSIONS):
+        mode = "r:xz"
+    elif filename.lower().endswith(".tar"):
+        mode = "r"
+    else:
+        logger.warning(
+            "Cannot determine compression type for file %s",
+            filename,
+        )
+        mode = "r:*"
+    tar = tarfile.open(filename, mode, encoding="utf-8")
+    try:
+        leading = has_leading_dir([member.name for member in tar.getmembers()])
+        for member in tar.getmembers():
+            fn = member.name
+            if leading:
+                fn = split_leading_dir(fn)[1]
+            path = os.path.join(location, fn)
+            if not is_within_directory(location, path):
+                message = (
+                    "The tar file ({}) has a file ({}) trying to install "
+                    "outside target directory ({})"
+                )
+                raise InstallationError(message.format(filename, path, location))
+            if member.isdir():
+                ensure_dir(path)
+            elif member.issym():
+                try:
+                    tar._extract_member(member, path)
+                except Exception as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        "In the tar file %s the member %s is invalid: %s",
+                        filename,
+                        member.name,
+                        exc,
+                    )
+                    continue
+            else:
+                try:
+                    fp = tar.extractfile(member)
+                except (KeyError, AttributeError) as exc:
+                    # Some corrupt tar files seem to produce this
+                    # (specifically bad symlinks)
+                    logger.warning(
+                        "In the tar file %s the member %s is invalid: %s",
+                        filename,
+                        member.name,
+                        exc,
+                    )
+                    continue
+                ensure_dir(os.path.dirname(path))
+                assert fp is not None
+                with open(path, "wb") as destfp:
+                    shutil.copyfileobj(fp, destfp)
+                fp.close()
+                # Update the timestamp (useful for cython compiled files)
+                tar.utime(member, path)
+                # member have any execute permissions for user/group/world?
+                if member.mode & 0o111:
+                    set_extracted_file_to_default_mode_plus_executable(path)
+    finally:
+        tar.close()
+
+
+def unpack_file(
+    filename: str,
+    location: str,
+    content_type: Optional[str] = None,
+) -> None:
+    filename = os.path.realpath(filename)
+    if (
+        content_type == "application/zip"
+        or filename.lower().endswith(ZIP_EXTENSIONS)
+        or zipfile.is_zipfile(filename)
+    ):
+        unzip_file(filename, location, flatten=not filename.endswith(".whl"))
+    elif (
+        content_type == "application/x-gzip"
+        or tarfile.is_tarfile(filename)
+        or filename.lower().endswith(TAR_EXTENSIONS + BZ2_EXTENSIONS + XZ_EXTENSIONS)
+    ):
+        untar_file(filename, location)
+    else:
+        # FIXME: handle?
+        # FIXME: magic signatures?
+        logger.critical(
+            "Cannot unpack file %s (downloaded from %s, content-type: %s); "
+            "cannot detect archive format",
+            filename,
+            location,
+            content_type,
+        )
+        raise InstallationError(f"Cannot determine archive format of {location}")
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/urls.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/urls.py
new file mode 100644
index 0000000..6ba2e04
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/urls.py
@@ -0,0 +1,62 @@
+import os
+import string
+import urllib.parse
+import urllib.request
+from typing import Optional
+
+from .compat import WINDOWS
+
+
+def get_url_scheme(url: str) -> Optional[str]:
+    if ":" not in url:
+        return None
+    return url.split(":", 1)[0].lower()
+
+
+def path_to_url(path: str) -> str:
+    """
+    Convert a path to a file: URL.  The path will be made absolute and have
+    quoted path parts.
+    """
+    path = os.path.normpath(os.path.abspath(path))
+    url = urllib.parse.urljoin("file:", urllib.request.pathname2url(path))
+    return url
+
+
+def url_to_path(url: str) -> str:
+    """
+    Convert a file: URL to a path.
+    """
+    assert url.startswith(
+        "file:"
+    ), f"You can only turn file: urls into filenames (not {url!r})"
+
+    _, netloc, path, _, _ = urllib.parse.urlsplit(url)
+
+    if not netloc or netloc == "localhost":
+        # According to RFC 8089, same as empty authority.
+        netloc = ""
+    elif WINDOWS:
+        # If we have a UNC path, prepend UNC share notation.
+        netloc = "\\\\" + netloc
+    else:
+        raise ValueError(
+            f"non-local file URIs are not supported on this platform: {url!r}"
+        )
+
+    path = urllib.request.url2pathname(netloc + path)
+
+    # On Windows, urlsplit parses the path as something like "/C:/Users/foo".
+    # This creates issues for path-related functions like io.open(), so we try
+    # to detect and strip the leading slash.
+    if (
+        WINDOWS
+        and not netloc  # Not UNC.
+        and len(path) >= 3
+        and path[0] == "/"  # Leading slash to strip.
+        and path[1] in string.ascii_letters  # Drive letter.
+        and path[2:4] in (":", ":/")  # Colon + end of string, or colon + absolute path.
+    ):
+        path = path[1:]
+
+    return path
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/virtualenv.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/virtualenv.py
new file mode 100644
index 0000000..c926db4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/virtualenv.py
@@ -0,0 +1,104 @@
+import logging
+import os
+import re
+import site
+import sys
+from typing import List, Optional
+
+logger = logging.getLogger(__name__)
+_INCLUDE_SYSTEM_SITE_PACKAGES_REGEX = re.compile(
+    r"include-system-site-packages\s*=\s*(?P<value>true|false)"
+)
+
+
+def _running_under_venv() -> bool:
+    """Checks if sys.base_prefix and sys.prefix match.
+
+    This handles PEP 405 compliant virtual environments.
+    """
+    return sys.prefix != getattr(sys, "base_prefix", sys.prefix)
+
+
+def _running_under_regular_virtualenv() -> bool:
+    """Checks if sys.real_prefix is set.
+
+    This handles virtual environments created with pypa's virtualenv.
+    """
+    # pypa/virtualenv case
+    return hasattr(sys, "real_prefix")
+
+
+def running_under_virtualenv() -> bool:
+    """Return True if we're running inside a virtualenv, False otherwise."""
+    return _running_under_venv() or _running_under_regular_virtualenv()
+
+
+def _get_pyvenv_cfg_lines() -> Optional[List[str]]:
+    """Reads {sys.prefix}/pyvenv.cfg and returns its contents as list of lines
+
+    Returns None, if it could not read/access the file.
+    """
+    pyvenv_cfg_file = os.path.join(sys.prefix, "pyvenv.cfg")
+    try:
+        # Although PEP 405 does not specify, the built-in venv module always
+        # writes with UTF-8. (pypa/pip#8717)
+        with open(pyvenv_cfg_file, encoding="utf-8") as f:
+            return f.read().splitlines()  # avoids trailing newlines
+    except OSError:
+        return None
+
+
+def _no_global_under_venv() -> bool:
+    """Check `{sys.prefix}/pyvenv.cfg` for system site-packages inclusion
+
+    PEP 405 specifies that when system site-packages are not supposed to be
+    visible from a virtual environment, `pyvenv.cfg` must contain the following
+    line:
+
+        include-system-site-packages = false
+
+    Additionally, log a warning if accessing the file fails.
+    """
+    cfg_lines = _get_pyvenv_cfg_lines()
+    if cfg_lines is None:
+        # We're not in a "sane" venv, so assume there is no system
+        # site-packages access (since that's PEP 405's default state).
+        logger.warning(
+            "Could not access 'pyvenv.cfg' despite a virtual environment "
+            "being active. Assuming global site-packages is not accessible "
+            "in this environment."
+        )
+        return True
+
+    for line in cfg_lines:
+        match = _INCLUDE_SYSTEM_SITE_PACKAGES_REGEX.match(line)
+        if match is not None and match.group("value") == "false":
+            return True
+    return False
+
+
+def _no_global_under_regular_virtualenv() -> bool:
+    """Check if "no-global-site-packages.txt" exists beside site.py
+
+    This mirrors logic in pypa/virtualenv for determining whether system
+    site-packages are visible in the virtual environment.
+    """
+    site_mod_dir = os.path.dirname(os.path.abspath(site.__file__))
+    no_global_site_packages_file = os.path.join(
+        site_mod_dir,
+        "no-global-site-packages.txt",
+    )
+    return os.path.exists(no_global_site_packages_file)
+
+
+def virtualenv_no_global() -> bool:
+    """Returns a boolean, whether running in venv with no system site-packages."""
+    # PEP 405 compliance needs to be checked first since virtualenv >=20 would
+    # return True for both checks, but is only able to use the PEP 405 config.
+    if _running_under_venv():
+        return _no_global_under_venv()
+
+    if _running_under_regular_virtualenv():
+        return _no_global_under_regular_virtualenv()
+
+    return False
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/utils/wheel.py b/venv/lib/python3.9/site-packages/pip/_internal/utils/wheel.py
new file mode 100644
index 0000000..e5e3f34
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/utils/wheel.py
@@ -0,0 +1,136 @@
+"""Support functions for working with wheel files.
+"""
+
+import logging
+from email.message import Message
+from email.parser import Parser
+from typing import Tuple
+from zipfile import BadZipFile, ZipFile
+
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.exceptions import UnsupportedWheel
+
+VERSION_COMPATIBLE = (1, 0)
+
+
+logger = logging.getLogger(__name__)
+
+
+def parse_wheel(wheel_zip: ZipFile, name: str) -> Tuple[str, Message]:
+    """Extract information from the provided wheel, ensuring it meets basic
+    standards.
+
+    Returns the name of the .dist-info directory and the parsed WHEEL metadata.
+    """
+    try:
+        info_dir = wheel_dist_info_dir(wheel_zip, name)
+        metadata = wheel_metadata(wheel_zip, info_dir)
+        version = wheel_version(metadata)
+    except UnsupportedWheel as e:
+        raise UnsupportedWheel("{} has an invalid wheel, {}".format(name, str(e)))
+
+    check_compatibility(version, name)
+
+    return info_dir, metadata
+
+
+def wheel_dist_info_dir(source: ZipFile, name: str) -> str:
+    """Returns the name of the contained .dist-info directory.
+
+    Raises AssertionError or UnsupportedWheel if not found, >1 found, or
+    it doesn't match the provided name.
+    """
+    # Zip file path separators must be /
+    subdirs = {p.split("/", 1)[0] for p in source.namelist()}
+
+    info_dirs = [s for s in subdirs if s.endswith(".dist-info")]
+
+    if not info_dirs:
+        raise UnsupportedWheel(".dist-info directory not found")
+
+    if len(info_dirs) > 1:
+        raise UnsupportedWheel(
+            "multiple .dist-info directories found: {}".format(", ".join(info_dirs))
+        )
+
+    info_dir = info_dirs[0]
+
+    info_dir_name = canonicalize_name(info_dir)
+    canonical_name = canonicalize_name(name)
+    if not info_dir_name.startswith(canonical_name):
+        raise UnsupportedWheel(
+            ".dist-info directory {!r} does not start with {!r}".format(
+                info_dir, canonical_name
+            )
+        )
+
+    return info_dir
+
+
+def read_wheel_metadata_file(source: ZipFile, path: str) -> bytes:
+    try:
+        return source.read(path)
+        # BadZipFile for general corruption, KeyError for missing entry,
+        # and RuntimeError for password-protected files
+    except (BadZipFile, KeyError, RuntimeError) as e:
+        raise UnsupportedWheel(f"could not read {path!r} file: {e!r}")
+
+
+def wheel_metadata(source: ZipFile, dist_info_dir: str) -> Message:
+    """Return the WHEEL metadata of an extracted wheel, if possible.
+    Otherwise, raise UnsupportedWheel.
+    """
+    path = f"{dist_info_dir}/WHEEL"
+    # Zip file path separators must be /
+    wheel_contents = read_wheel_metadata_file(source, path)
+
+    try:
+        wheel_text = wheel_contents.decode()
+    except UnicodeDecodeError as e:
+        raise UnsupportedWheel(f"error decoding {path!r}: {e!r}")
+
+    # FeedParser (used by Parser) does not raise any exceptions. The returned
+    # message may have .defects populated, but for backwards-compatibility we
+    # currently ignore them.
+    return Parser().parsestr(wheel_text)
+
+
+def wheel_version(wheel_data: Message) -> Tuple[int, ...]:
+    """Given WHEEL metadata, return the parsed Wheel-Version.
+    Otherwise, raise UnsupportedWheel.
+    """
+    version_text = wheel_data["Wheel-Version"]
+    if version_text is None:
+        raise UnsupportedWheel("WHEEL is missing Wheel-Version")
+
+    version = version_text.strip()
+
+    try:
+        return tuple(map(int, version.split(".")))
+    except ValueError:
+        raise UnsupportedWheel(f"invalid Wheel-Version: {version!r}")
+
+
+def check_compatibility(version: Tuple[int, ...], name: str) -> None:
+    """Raises errors or warns if called with an incompatible Wheel-Version.
+
+    pip should refuse to install a Wheel-Version that's a major series
+    ahead of what it's compatible with (e.g 2.0 > 1.1); and warn when
+    installing a version only minor version ahead (e.g 1.2 > 1.1).
+
+    version: a 2-tuple representing a Wheel-Version (Major, Minor)
+    name: name of wheel or package to raise exception about
+
+    :raises UnsupportedWheel: when an incompatible Wheel-Version is given
+    """
+    if version[0] > VERSION_COMPATIBLE[0]:
+        raise UnsupportedWheel(
+            "{}'s Wheel-Version ({}) is not compatible with this version "
+            "of pip".format(name, ".".join(map(str, version)))
+        )
+    elif version > VERSION_COMPATIBLE:
+        logger.warning(
+            "Installing from a newer Wheel-Version (%s)",
+            ".".join(map(str, version)),
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__init__.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__init__.py
new file mode 100644
index 0000000..b6beddb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__init__.py
@@ -0,0 +1,15 @@
+# Expose a limited set of classes and functions so callers outside of
+# the vcs package don't need to import deeper than `pip._internal.vcs`.
+# (The test directory may still need to import from a vcs sub-package.)
+# Import all vcs modules to register each VCS in the VcsSupport object.
+import pip._internal.vcs.bazaar
+import pip._internal.vcs.git
+import pip._internal.vcs.mercurial
+import pip._internal.vcs.subversion  # noqa: F401
+from pip._internal.vcs.versioncontrol import (  # noqa: F401
+    RemoteNotFoundError,
+    RemoteNotValidError,
+    is_url,
+    make_vcs_requirement_url,
+    vcs,
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..80bd479
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-39.pyc
new file mode 100644
index 0000000..80e2b7e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/bazaar.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/git.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/git.cpython-39.pyc
new file mode 100644
index 0000000..51e3c79
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/git.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-39.pyc
new file mode 100644
index 0000000..305bb30
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/mercurial.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-39.pyc
new file mode 100644
index 0000000..4452ce0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/subversion.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-39.pyc
new file mode 100644
index 0000000..438795d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/__pycache__/versioncontrol.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/bazaar.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/bazaar.py
new file mode 100644
index 0000000..06c80e4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/bazaar.py
@@ -0,0 +1,112 @@
+import logging
+from typing import List, Optional, Tuple
+
+from pip._internal.utils.misc import HiddenText, display_path
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs.versioncontrol import (
+    AuthInfo,
+    RemoteNotFoundError,
+    RevOptions,
+    VersionControl,
+    vcs,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class Bazaar(VersionControl):
+    name = "bzr"
+    dirname = ".bzr"
+    repo_name = "branch"
+    schemes = (
+        "bzr+http",
+        "bzr+https",
+        "bzr+ssh",
+        "bzr+sftp",
+        "bzr+ftp",
+        "bzr+lp",
+        "bzr+file",
+    )
+
+    @staticmethod
+    def get_base_rev_args(rev: str) -> List[str]:
+        return ["-r", rev]
+
+    def fetch_new(
+        self, dest: str, url: HiddenText, rev_options: RevOptions, verbosity: int
+    ) -> None:
+        rev_display = rev_options.to_display()
+        logger.info(
+            "Checking out %s%s to %s",
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        if verbosity <= 0:
+            flag = "--quiet"
+        elif verbosity == 1:
+            flag = ""
+        else:
+            flag = f"-{'v'*verbosity}"
+        cmd_args = make_command(
+            "checkout", "--lightweight", flag, rev_options.to_args(), url, dest
+        )
+        self.run_command(cmd_args)
+
+    def switch(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        self.run_command(make_command("switch", url), cwd=dest)
+
+    def update(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        output = self.run_command(
+            make_command("info"), show_stdout=False, stdout_only=True, cwd=dest
+        )
+        if output.startswith("Standalone "):
+            # Older versions of pip used to create standalone branches.
+            # Convert the standalone branch to a checkout by calling "bzr bind".
+            cmd_args = make_command("bind", "-q", url)
+            self.run_command(cmd_args, cwd=dest)
+
+        cmd_args = make_command("update", "-q", rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url: str) -> Tuple[str, Optional[str], AuthInfo]:
+        # hotfix the URL scheme after removing bzr+ from bzr+ssh:// readd it
+        url, rev, user_pass = super().get_url_rev_and_auth(url)
+        if url.startswith("ssh://"):
+            url = "bzr+" + url
+        return url, rev, user_pass
+
+    @classmethod
+    def get_remote_url(cls, location: str) -> str:
+        urls = cls.run_command(
+            ["info"], show_stdout=False, stdout_only=True, cwd=location
+        )
+        for line in urls.splitlines():
+            line = line.strip()
+            for x in ("checkout of branch: ", "parent branch: "):
+                if line.startswith(x):
+                    repo = line.split(x)[1]
+                    if cls._is_local_repository(repo):
+                        return path_to_url(repo)
+                    return repo
+        raise RemoteNotFoundError
+
+    @classmethod
+    def get_revision(cls, location: str) -> str:
+        revision = cls.run_command(
+            ["revno"],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        )
+        return revision.splitlines()[-1]
+
+    @classmethod
+    def is_commit_id_equal(cls, dest: str, name: Optional[str]) -> bool:
+        """Always assume the versions don't match"""
+        return False
+
+
+vcs.register(Bazaar)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/git.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/git.py
new file mode 100644
index 0000000..8d1d499
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/git.py
@@ -0,0 +1,526 @@
+import logging
+import os.path
+import pathlib
+import re
+import urllib.parse
+import urllib.request
+from typing import List, Optional, Tuple
+
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.utils.misc import HiddenText, display_path, hide_url
+from pip._internal.utils.subprocess import make_command
+from pip._internal.vcs.versioncontrol import (
+    AuthInfo,
+    RemoteNotFoundError,
+    RemoteNotValidError,
+    RevOptions,
+    VersionControl,
+    find_path_to_project_root_from_repo_root,
+    vcs,
+)
+
+urlsplit = urllib.parse.urlsplit
+urlunsplit = urllib.parse.urlunsplit
+
+
+logger = logging.getLogger(__name__)
+
+
+GIT_VERSION_REGEX = re.compile(
+    r"^git version "  # Prefix.
+    r"(\d+)"  # Major.
+    r"\.(\d+)"  # Dot, minor.
+    r"(?:\.(\d+))?"  # Optional dot, patch.
+    r".*$"  # Suffix, including any pre- and post-release segments we don't care about.
+)
+
+HASH_REGEX = re.compile("^[a-fA-F0-9]{40}$")
+
+# SCP (Secure copy protocol) shorthand. e.g. 'git@example.com:foo/bar.git'
+SCP_REGEX = re.compile(
+    r"""^
+    # Optional user, e.g. 'git@'
+    (\w+@)?
+    # Server, e.g. 'github.com'.
+    ([^/:]+):
+    # The server-side path. e.g. 'user/project.git'. Must start with an
+    # alphanumeric character so as not to be confusable with a Windows paths
+    # like 'C:/foo/bar' or 'C:\foo\bar'.
+    (\w[^:]*)
+    $""",
+    re.VERBOSE,
+)
+
+
+def looks_like_hash(sha: str) -> bool:
+    return bool(HASH_REGEX.match(sha))
+
+
+class Git(VersionControl):
+    name = "git"
+    dirname = ".git"
+    repo_name = "clone"
+    schemes = (
+        "git+http",
+        "git+https",
+        "git+ssh",
+        "git+git",
+        "git+file",
+    )
+    # Prevent the user's environment variables from interfering with pip:
+    # https://github.com/pypa/pip/issues/1130
+    unset_environ = ("GIT_DIR", "GIT_WORK_TREE")
+    default_arg_rev = "HEAD"
+
+    @staticmethod
+    def get_base_rev_args(rev: str) -> List[str]:
+        return [rev]
+
+    def is_immutable_rev_checkout(self, url: str, dest: str) -> bool:
+        _, rev_options = self.get_url_rev_options(hide_url(url))
+        if not rev_options.rev:
+            return False
+        if not self.is_commit_id_equal(dest, rev_options.rev):
+            # the current commit is different from rev,
+            # which means rev was something else than a commit hash
+            return False
+        # return False in the rare case rev is both a commit hash
+        # and a tag or a branch; we don't want to cache in that case
+        # because that branch/tag could point to something else in the future
+        is_tag_or_branch = bool(self.get_revision_sha(dest, rev_options.rev)[0])
+        return not is_tag_or_branch
+
+    def get_git_version(self) -> Tuple[int, ...]:
+        version = self.run_command(
+            ["version"],
+            command_desc="git version",
+            show_stdout=False,
+            stdout_only=True,
+        )
+        match = GIT_VERSION_REGEX.match(version)
+        if not match:
+            logger.warning("Can't parse git version: %s", version)
+            return ()
+        return tuple(int(c) for c in match.groups())
+
+    @classmethod
+    def get_current_branch(cls, location: str) -> Optional[str]:
+        """
+        Return the current branch, or None if HEAD isn't at a branch
+        (e.g. detached HEAD).
+        """
+        # git-symbolic-ref exits with empty stdout if "HEAD" is a detached
+        # HEAD rather than a symbolic ref.  In addition, the -q causes the
+        # command to exit with status code 1 instead of 128 in this case
+        # and to suppress the message to stderr.
+        args = ["symbolic-ref", "-q", "HEAD"]
+        output = cls.run_command(
+            args,
+            extra_ok_returncodes=(1,),
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        )
+        ref = output.strip()
+
+        if ref.startswith("refs/heads/"):
+            return ref[len("refs/heads/") :]
+
+        return None
+
+    @classmethod
+    def get_revision_sha(cls, dest: str, rev: str) -> Tuple[Optional[str], bool]:
+        """
+        Return (sha_or_none, is_branch), where sha_or_none is a commit hash
+        if the revision names a remote branch or tag, otherwise None.
+
+        Args:
+          dest: the repository directory.
+          rev: the revision name.
+        """
+        # Pass rev to pre-filter the list.
+        output = cls.run_command(
+            ["show-ref", rev],
+            cwd=dest,
+            show_stdout=False,
+            stdout_only=True,
+            on_returncode="ignore",
+        )
+        refs = {}
+        # NOTE: We do not use splitlines here since that would split on other
+        #       unicode separators, which can be maliciously used to install a
+        #       different revision.
+        for line in output.strip().split("\n"):
+            line = line.rstrip("\r")
+            if not line:
+                continue
+            try:
+                ref_sha, ref_name = line.split(" ", maxsplit=2)
+            except ValueError:
+                # Include the offending line to simplify troubleshooting if
+                # this error ever occurs.
+                raise ValueError(f"unexpected show-ref line: {line!r}")
+
+            refs[ref_name] = ref_sha
+
+        branch_ref = f"refs/remotes/origin/{rev}"
+        tag_ref = f"refs/tags/{rev}"
+
+        sha = refs.get(branch_ref)
+        if sha is not None:
+            return (sha, True)
+
+        sha = refs.get(tag_ref)
+
+        return (sha, False)
+
+    @classmethod
+    def _should_fetch(cls, dest: str, rev: str) -> bool:
+        """
+        Return true if rev is a ref or is a commit that we don't have locally.
+
+        Branches and tags are not considered in this method because they are
+        assumed to be always available locally (which is a normal outcome of
+        ``git clone`` and ``git fetch --tags``).
+        """
+        if rev.startswith("refs/"):
+            # Always fetch remote refs.
+            return True
+
+        if not looks_like_hash(rev):
+            # Git fetch would fail with abbreviated commits.
+            return False
+
+        if cls.has_commit(dest, rev):
+            # Don't fetch if we have the commit locally.
+            return False
+
+        return True
+
+    @classmethod
+    def resolve_revision(
+        cls, dest: str, url: HiddenText, rev_options: RevOptions
+    ) -> RevOptions:
+        """
+        Resolve a revision to a new RevOptions object with the SHA1 of the
+        branch, tag, or ref if found.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        rev = rev_options.arg_rev
+        # The arg_rev property's implementation for Git ensures that the
+        # rev return value is always non-None.
+        assert rev is not None
+
+        sha, is_branch = cls.get_revision_sha(dest, rev)
+
+        if sha is not None:
+            rev_options = rev_options.make_new(sha)
+            rev_options.branch_name = rev if is_branch else None
+
+            return rev_options
+
+        # Do not show a warning for the common case of something that has
+        # the form of a Git commit hash.
+        if not looks_like_hash(rev):
+            logger.warning(
+                "Did not find branch or tag '%s', assuming revision or ref.",
+                rev,
+            )
+
+        if not cls._should_fetch(dest, rev):
+            return rev_options
+
+        # fetch the requested revision
+        cls.run_command(
+            make_command("fetch", "-q", url, rev_options.to_args()),
+            cwd=dest,
+        )
+        # Change the revision to the SHA of the ref we fetched
+        sha = cls.get_revision(dest, rev="FETCH_HEAD")
+        rev_options = rev_options.make_new(sha)
+
+        return rev_options
+
+    @classmethod
+    def is_commit_id_equal(cls, dest: str, name: Optional[str]) -> bool:
+        """
+        Return whether the current commit hash equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        if not name:
+            # Then avoid an unnecessary subprocess call.
+            return False
+
+        return cls.get_revision(dest) == name
+
+    def fetch_new(
+        self, dest: str, url: HiddenText, rev_options: RevOptions, verbosity: int
+    ) -> None:
+        rev_display = rev_options.to_display()
+        logger.info("Cloning %s%s to %s", url, rev_display, display_path(dest))
+        if verbosity <= 0:
+            flags: Tuple[str, ...] = ("--quiet",)
+        elif verbosity == 1:
+            flags = ()
+        else:
+            flags = ("--verbose", "--progress")
+        if self.get_git_version() >= (2, 17):
+            # Git added support for partial clone in 2.17
+            # https://git-scm.com/docs/partial-clone
+            # Speeds up cloning by functioning without a complete copy of repository
+            self.run_command(
+                make_command(
+                    "clone",
+                    "--filter=blob:none",
+                    *flags,
+                    url,
+                    dest,
+                )
+            )
+        else:
+            self.run_command(make_command("clone", *flags, url, dest))
+
+        if rev_options.rev:
+            # Then a specific revision was requested.
+            rev_options = self.resolve_revision(dest, url, rev_options)
+            branch_name = getattr(rev_options, "branch_name", None)
+            logger.debug("Rev options %s, branch_name %s", rev_options, branch_name)
+            if branch_name is None:
+                # Only do a checkout if the current commit id doesn't match
+                # the requested revision.
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    cmd_args = make_command(
+                        "checkout",
+                        "-q",
+                        rev_options.to_args(),
+                    )
+                    self.run_command(cmd_args, cwd=dest)
+            elif self.get_current_branch(dest) != branch_name:
+                # Then a specific branch was requested, and that branch
+                # is not yet checked out.
+                track_branch = f"origin/{branch_name}"
+                cmd_args = [
+                    "checkout",
+                    "-b",
+                    branch_name,
+                    "--track",
+                    track_branch,
+                ]
+                self.run_command(cmd_args, cwd=dest)
+        else:
+            sha = self.get_revision(dest)
+            rev_options = rev_options.make_new(sha)
+
+        logger.info("Resolved %s to commit %s", url, rev_options.rev)
+
+        #: repo may contain submodules
+        self.update_submodules(dest)
+
+    def switch(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        self.run_command(
+            make_command("config", "remote.origin.url", url),
+            cwd=dest,
+        )
+        cmd_args = make_command("checkout", "-q", rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+        self.update_submodules(dest)
+
+    def update(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        # First fetch changes from the default remote
+        if self.get_git_version() >= (1, 9):
+            # fetch tags in addition to everything else
+            self.run_command(["fetch", "-q", "--tags"], cwd=dest)
+        else:
+            self.run_command(["fetch", "-q"], cwd=dest)
+        # Then reset to wanted revision (maybe even origin/master)
+        rev_options = self.resolve_revision(dest, url, rev_options)
+        cmd_args = make_command("reset", "--hard", "-q", rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+        #: update submodules
+        self.update_submodules(dest)
+
+    @classmethod
+    def get_remote_url(cls, location: str) -> str:
+        """
+        Return URL of the first remote encountered.
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        # We need to pass 1 for extra_ok_returncodes since the command
+        # exits with return code 1 if there are no matching lines.
+        stdout = cls.run_command(
+            ["config", "--get-regexp", r"remote\..*\.url"],
+            extra_ok_returncodes=(1,),
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        )
+        remotes = stdout.splitlines()
+        try:
+            found_remote = remotes[0]
+        except IndexError:
+            raise RemoteNotFoundError
+
+        for remote in remotes:
+            if remote.startswith("remote.origin.url "):
+                found_remote = remote
+                break
+        url = found_remote.split(" ")[1]
+        return cls._git_remote_to_pip_url(url.strip())
+
+    @staticmethod
+    def _git_remote_to_pip_url(url: str) -> str:
+        """
+        Convert a remote url from what git uses to what pip accepts.
+
+        There are 3 legal forms **url** may take:
+
+            1. A fully qualified url: ssh://git@example.com/foo/bar.git
+            2. A local project.git folder: /path/to/bare/repository.git
+            3. SCP shorthand for form 1: git@example.com:foo/bar.git
+
+        Form 1 is output as-is. Form 2 must be converted to URI and form 3 must
+        be converted to form 1.
+
+        See the corresponding test test_git_remote_url_to_pip() for examples of
+        sample inputs/outputs.
+        """
+        if re.match(r"\w+://", url):
+            # This is already valid. Pass it though as-is.
+            return url
+        if os.path.exists(url):
+            # A local bare remote (git clone --mirror).
+            # Needs a file:// prefix.
+            return pathlib.PurePath(url).as_uri()
+        scp_match = SCP_REGEX.match(url)
+        if scp_match:
+            # Add an ssh:// prefix and replace the ':' with a '/'.
+            return scp_match.expand(r"ssh://\1\2/\3")
+        # Otherwise, bail out.
+        raise RemoteNotValidError(url)
+
+    @classmethod
+    def has_commit(cls, location: str, rev: str) -> bool:
+        """
+        Check if rev is a commit that is available in the local repository.
+        """
+        try:
+            cls.run_command(
+                ["rev-parse", "-q", "--verify", "sha^" + rev],
+                cwd=location,
+                log_failed_cmd=False,
+            )
+        except InstallationError:
+            return False
+        else:
+            return True
+
+    @classmethod
+    def get_revision(cls, location: str, rev: Optional[str] = None) -> str:
+        if rev is None:
+            rev = "HEAD"
+        current_rev = cls.run_command(
+            ["rev-parse", rev],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        )
+        return current_rev.strip()
+
+    @classmethod
+    def get_subdirectory(cls, location: str) -> Optional[str]:
+        """
+        Return the path to Python project root, relative to the repo root.
+        Return None if the project root is in the repo root.
+        """
+        # find the repo root
+        git_dir = cls.run_command(
+            ["rev-parse", "--git-dir"],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        ).strip()
+        if not os.path.isabs(git_dir):
+            git_dir = os.path.join(location, git_dir)
+        repo_root = os.path.abspath(os.path.join(git_dir, ".."))
+        return find_path_to_project_root_from_repo_root(location, repo_root)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url: str) -> Tuple[str, Optional[str], AuthInfo]:
+        """
+        Prefixes stub URLs like 'user@hostname:user/repo.git' with 'ssh://'.
+        That's required because although they use SSH they sometimes don't
+        work with a ssh:// scheme (e.g. GitHub). But we need a scheme for
+        parsing. Hence we remove it again afterwards and return it as a stub.
+        """
+        # Works around an apparent Git bug
+        # (see https://article.gmane.org/gmane.comp.version-control.git/146500)
+        scheme, netloc, path, query, fragment = urlsplit(url)
+        if scheme.endswith("file"):
+            initial_slashes = path[: -len(path.lstrip("/"))]
+            newpath = initial_slashes + urllib.request.url2pathname(path).replace(
+                "\\", "/"
+            ).lstrip("/")
+            after_plus = scheme.find("+") + 1
+            url = scheme[:after_plus] + urlunsplit(
+                (scheme[after_plus:], netloc, newpath, query, fragment),
+            )
+
+        if "://" not in url:
+            assert "file:" not in url
+            url = url.replace("git+", "git+ssh://")
+            url, rev, user_pass = super().get_url_rev_and_auth(url)
+            url = url.replace("ssh://", "")
+        else:
+            url, rev, user_pass = super().get_url_rev_and_auth(url)
+
+        return url, rev, user_pass
+
+    @classmethod
+    def update_submodules(cls, location: str) -> None:
+        if not os.path.exists(os.path.join(location, ".gitmodules")):
+            return
+        cls.run_command(
+            ["submodule", "update", "--init", "--recursive", "-q"],
+            cwd=location,
+        )
+
+    @classmethod
+    def get_repository_root(cls, location: str) -> Optional[str]:
+        loc = super().get_repository_root(location)
+        if loc:
+            return loc
+        try:
+            r = cls.run_command(
+                ["rev-parse", "--show-toplevel"],
+                cwd=location,
+                show_stdout=False,
+                stdout_only=True,
+                on_returncode="raise",
+                log_failed_cmd=False,
+            )
+        except BadCommand:
+            logger.debug(
+                "could not determine if %s is under git control "
+                "because git is not available",
+                location,
+            )
+            return None
+        except InstallationError:
+            return None
+        return os.path.normpath(r.rstrip("\r\n"))
+
+    @staticmethod
+    def should_add_vcs_url_prefix(repo_url: str) -> bool:
+        """In either https or ssh form, requirements must be prefixed with git+."""
+        return True
+
+
+vcs.register(Git)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/mercurial.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/mercurial.py
new file mode 100644
index 0000000..2a005e0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/mercurial.py
@@ -0,0 +1,163 @@
+import configparser
+import logging
+import os
+from typing import List, Optional, Tuple
+
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.utils.misc import HiddenText, display_path
+from pip._internal.utils.subprocess import make_command
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs.versioncontrol import (
+    RevOptions,
+    VersionControl,
+    find_path_to_project_root_from_repo_root,
+    vcs,
+)
+
+logger = logging.getLogger(__name__)
+
+
+class Mercurial(VersionControl):
+    name = "hg"
+    dirname = ".hg"
+    repo_name = "clone"
+    schemes = (
+        "hg+file",
+        "hg+http",
+        "hg+https",
+        "hg+ssh",
+        "hg+static-http",
+    )
+
+    @staticmethod
+    def get_base_rev_args(rev: str) -> List[str]:
+        return [rev]
+
+    def fetch_new(
+        self, dest: str, url: HiddenText, rev_options: RevOptions, verbosity: int
+    ) -> None:
+        rev_display = rev_options.to_display()
+        logger.info(
+            "Cloning hg %s%s to %s",
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        if verbosity <= 0:
+            flags: Tuple[str, ...] = ("--quiet",)
+        elif verbosity == 1:
+            flags = ()
+        elif verbosity == 2:
+            flags = ("--verbose",)
+        else:
+            flags = ("--verbose", "--debug")
+        self.run_command(make_command("clone", "--noupdate", *flags, url, dest))
+        self.run_command(
+            make_command("update", *flags, rev_options.to_args()),
+            cwd=dest,
+        )
+
+    def switch(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        repo_config = os.path.join(dest, self.dirname, "hgrc")
+        config = configparser.RawConfigParser()
+        try:
+            config.read(repo_config)
+            config.set("paths", "default", url.secret)
+            with open(repo_config, "w") as config_file:
+                config.write(config_file)
+        except (OSError, configparser.NoSectionError) as exc:
+            logger.warning("Could not switch Mercurial repository to %s: %s", url, exc)
+        else:
+            cmd_args = make_command("update", "-q", rev_options.to_args())
+            self.run_command(cmd_args, cwd=dest)
+
+    def update(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        self.run_command(["pull", "-q"], cwd=dest)
+        cmd_args = make_command("update", "-q", rev_options.to_args())
+        self.run_command(cmd_args, cwd=dest)
+
+    @classmethod
+    def get_remote_url(cls, location: str) -> str:
+        url = cls.run_command(
+            ["showconfig", "paths.default"],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        ).strip()
+        if cls._is_local_repository(url):
+            url = path_to_url(url)
+        return url.strip()
+
+    @classmethod
+    def get_revision(cls, location: str) -> str:
+        """
+        Return the repository-local changeset revision number, as an integer.
+        """
+        current_revision = cls.run_command(
+            ["parents", "--template={rev}"],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        ).strip()
+        return current_revision
+
+    @classmethod
+    def get_requirement_revision(cls, location: str) -> str:
+        """
+        Return the changeset identification hash, as a 40-character
+        hexadecimal string
+        """
+        current_rev_hash = cls.run_command(
+            ["parents", "--template={node}"],
+            show_stdout=False,
+            stdout_only=True,
+            cwd=location,
+        ).strip()
+        return current_rev_hash
+
+    @classmethod
+    def is_commit_id_equal(cls, dest: str, name: Optional[str]) -> bool:
+        """Always assume the versions don't match"""
+        return False
+
+    @classmethod
+    def get_subdirectory(cls, location: str) -> Optional[str]:
+        """
+        Return the path to Python project root, relative to the repo root.
+        Return None if the project root is in the repo root.
+        """
+        # find the repo root
+        repo_root = cls.run_command(
+            ["root"], show_stdout=False, stdout_only=True, cwd=location
+        ).strip()
+        if not os.path.isabs(repo_root):
+            repo_root = os.path.abspath(os.path.join(location, repo_root))
+        return find_path_to_project_root_from_repo_root(location, repo_root)
+
+    @classmethod
+    def get_repository_root(cls, location: str) -> Optional[str]:
+        loc = super().get_repository_root(location)
+        if loc:
+            return loc
+        try:
+            r = cls.run_command(
+                ["root"],
+                cwd=location,
+                show_stdout=False,
+                stdout_only=True,
+                on_returncode="raise",
+                log_failed_cmd=False,
+            )
+        except BadCommand:
+            logger.debug(
+                "could not determine if %s is under hg control "
+                "because hg is not available",
+                location,
+            )
+            return None
+        except InstallationError:
+            return None
+        return os.path.normpath(r.rstrip("\r\n"))
+
+
+vcs.register(Mercurial)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/subversion.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/subversion.py
new file mode 100644
index 0000000..2cd6f0a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/subversion.py
@@ -0,0 +1,324 @@
+import logging
+import os
+import re
+from typing import List, Optional, Tuple
+
+from pip._internal.utils.misc import (
+    HiddenText,
+    display_path,
+    is_console_interactive,
+    is_installable_dir,
+    split_auth_from_netloc,
+)
+from pip._internal.utils.subprocess import CommandArgs, make_command
+from pip._internal.vcs.versioncontrol import (
+    AuthInfo,
+    RemoteNotFoundError,
+    RevOptions,
+    VersionControl,
+    vcs,
+)
+
+logger = logging.getLogger(__name__)
+
+_svn_xml_url_re = re.compile('url="([^"]+)"')
+_svn_rev_re = re.compile(r'committed-rev="(\d+)"')
+_svn_info_xml_rev_re = re.compile(r'\s*revision="(\d+)"')
+_svn_info_xml_url_re = re.compile(r"<url>(.*)</url>")
+
+
+class Subversion(VersionControl):
+    name = "svn"
+    dirname = ".svn"
+    repo_name = "checkout"
+    schemes = ("svn+ssh", "svn+http", "svn+https", "svn+svn", "svn+file")
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url: str) -> bool:
+        return True
+
+    @staticmethod
+    def get_base_rev_args(rev: str) -> List[str]:
+        return ["-r", rev]
+
+    @classmethod
+    def get_revision(cls, location: str) -> str:
+        """
+        Return the maximum revision for all files under a given location
+        """
+        # Note: taken from setuptools.command.egg_info
+        revision = 0
+
+        for base, dirs, _ in os.walk(location):
+            if cls.dirname not in dirs:
+                dirs[:] = []
+                continue  # no sense walking uncontrolled subdirs
+            dirs.remove(cls.dirname)
+            entries_fn = os.path.join(base, cls.dirname, "entries")
+            if not os.path.exists(entries_fn):
+                # FIXME: should we warn?
+                continue
+
+            dirurl, localrev = cls._get_svn_url_rev(base)
+
+            if base == location:
+                assert dirurl is not None
+                base = dirurl + "/"  # save the root url
+            elif not dirurl or not dirurl.startswith(base):
+                dirs[:] = []
+                continue  # not part of the same svn tree, skip it
+            revision = max(revision, localrev)
+        return str(revision)
+
+    @classmethod
+    def get_netloc_and_auth(
+        cls, netloc: str, scheme: str
+    ) -> Tuple[str, Tuple[Optional[str], Optional[str]]]:
+        """
+        This override allows the auth information to be passed to svn via the
+        --username and --password options instead of via the URL.
+        """
+        if scheme == "ssh":
+            # The --username and --password options can't be used for
+            # svn+ssh URLs, so keep the auth information in the URL.
+            return super().get_netloc_and_auth(netloc, scheme)
+
+        return split_auth_from_netloc(netloc)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url: str) -> Tuple[str, Optional[str], AuthInfo]:
+        # hotfix the URL scheme after removing svn+ from svn+ssh:// readd it
+        url, rev, user_pass = super().get_url_rev_and_auth(url)
+        if url.startswith("ssh://"):
+            url = "svn+" + url
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(
+        username: Optional[str], password: Optional[HiddenText]
+    ) -> CommandArgs:
+        extra_args: CommandArgs = []
+        if username:
+            extra_args += ["--username", username]
+        if password:
+            extra_args += ["--password", password]
+
+        return extra_args
+
+    @classmethod
+    def get_remote_url(cls, location: str) -> str:
+        # In cases where the source is in a subdirectory, we have to look up in
+        # the location until we find a valid project root.
+        orig_location = location
+        while not is_installable_dir(location):
+            last_location = location
+            location = os.path.dirname(location)
+            if location == last_location:
+                # We've traversed up to the root of the filesystem without
+                # finding a Python project.
+                logger.warning(
+                    "Could not find Python project for directory %s (tried all "
+                    "parent directories)",
+                    orig_location,
+                )
+                raise RemoteNotFoundError
+
+        url, _rev = cls._get_svn_url_rev(location)
+        if url is None:
+            raise RemoteNotFoundError
+
+        return url
+
+    @classmethod
+    def _get_svn_url_rev(cls, location: str) -> Tuple[Optional[str], int]:
+        from pip._internal.exceptions import InstallationError
+
+        entries_path = os.path.join(location, cls.dirname, "entries")
+        if os.path.exists(entries_path):
+            with open(entries_path) as f:
+                data = f.read()
+        else:  # subversion >= 1.7 does not have the 'entries' file
+            data = ""
+
+        url = None
+        if data.startswith("8") or data.startswith("9") or data.startswith("10"):
+            entries = list(map(str.splitlines, data.split("\n\x0c\n")))
+            del entries[0][0]  # get rid of the '8'
+            url = entries[0][3]
+            revs = [int(d[9]) for d in entries if len(d) > 9 and d[9]] + [0]
+        elif data.startswith("<?xml"):
+            match = _svn_xml_url_re.search(data)
+            if not match:
+                raise ValueError(f"Badly formatted data: {data!r}")
+            url = match.group(1)  # get repository URL
+            revs = [int(m.group(1)) for m in _svn_rev_re.finditer(data)] + [0]
+        else:
+            try:
+                # subversion >= 1.7
+                # Note that using get_remote_call_options is not necessary here
+                # because `svn info` is being run against a local directory.
+                # We don't need to worry about making sure interactive mode
+                # is being used to prompt for passwords, because passwords
+                # are only potentially needed for remote server requests.
+                xml = cls.run_command(
+                    ["info", "--xml", location],
+                    show_stdout=False,
+                    stdout_only=True,
+                )
+                match = _svn_info_xml_url_re.search(xml)
+                assert match is not None
+                url = match.group(1)
+                revs = [int(m.group(1)) for m in _svn_info_xml_rev_re.finditer(xml)]
+            except InstallationError:
+                url, revs = None, []
+
+        if revs:
+            rev = max(revs)
+        else:
+            rev = 0
+
+        return url, rev
+
+    @classmethod
+    def is_commit_id_equal(cls, dest: str, name: Optional[str]) -> bool:
+        """Always assume the versions don't match"""
+        return False
+
+    def __init__(self, use_interactive: Optional[bool] = None) -> None:
+        if use_interactive is None:
+            use_interactive = is_console_interactive()
+        self.use_interactive = use_interactive
+
+        # This member is used to cache the fetched version of the current
+        # ``svn`` client.
+        # Special value definitions:
+        #   None: Not evaluated yet.
+        #   Empty tuple: Could not parse version.
+        self._vcs_version: Optional[Tuple[int, ...]] = None
+
+        super().__init__()
+
+    def call_vcs_version(self) -> Tuple[int, ...]:
+        """Query the version of the currently installed Subversion client.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        # Example versions:
+        #   svn, version 1.10.3 (r1842928)
+        #      compiled Feb 25 2019, 14:20:39 on x86_64-apple-darwin17.0.0
+        #   svn, version 1.7.14 (r1542130)
+        #      compiled Mar 28 2018, 08:49:13 on x86_64-pc-linux-gnu
+        #   svn, version 1.12.0-SlikSvn (SlikSvn/1.12.0)
+        #      compiled May 28 2019, 13:44:56 on x86_64-microsoft-windows6.2
+        version_prefix = "svn, version "
+        version = self.run_command(["--version"], show_stdout=False, stdout_only=True)
+        if not version.startswith(version_prefix):
+            return ()
+
+        version = version[len(version_prefix) :].split()[0]
+        version_list = version.partition("-")[0].split(".")
+        try:
+            parsed_version = tuple(map(int, version_list))
+        except ValueError:
+            return ()
+
+        return parsed_version
+
+    def get_vcs_version(self) -> Tuple[int, ...]:
+        """Return the version of the currently installed Subversion client.
+
+        If the version of the Subversion client has already been queried,
+        a cached value will be used.
+
+        :return: A tuple containing the parts of the version information or
+            ``()`` if the version returned from ``svn`` could not be parsed.
+        :raises: BadCommand: If ``svn`` is not installed.
+        """
+        if self._vcs_version is not None:
+            # Use cached version, if available.
+            # If parsing the version failed previously (empty tuple),
+            # do not attempt to parse it again.
+            return self._vcs_version
+
+        vcs_version = self.call_vcs_version()
+        self._vcs_version = vcs_version
+        return vcs_version
+
+    def get_remote_call_options(self) -> CommandArgs:
+        """Return options to be used on calls to Subversion that contact the server.
+
+        These options are applicable for the following ``svn`` subcommands used
+        in this class.
+
+            - checkout
+            - switch
+            - update
+
+        :return: A list of command line arguments to pass to ``svn``.
+        """
+        if not self.use_interactive:
+            # --non-interactive switch is available since Subversion 0.14.4.
+            # Subversion < 1.8 runs in interactive mode by default.
+            return ["--non-interactive"]
+
+        svn_version = self.get_vcs_version()
+        # By default, Subversion >= 1.8 runs in non-interactive mode if
+        # stdin is not a TTY. Since that is how pip invokes SVN, in
+        # call_subprocess(), pip must pass --force-interactive to ensure
+        # the user can be prompted for a password, if required.
+        #   SVN added the --force-interactive option in SVN 1.8. Since
+        # e.g. RHEL/CentOS 7, which is supported until 2024, ships with
+        # SVN 1.7, pip should continue to support SVN 1.7. Therefore, pip
+        # can't safely add the option if the SVN version is < 1.8 (or unknown).
+        if svn_version >= (1, 8):
+            return ["--force-interactive"]
+
+        return []
+
+    def fetch_new(
+        self, dest: str, url: HiddenText, rev_options: RevOptions, verbosity: int
+    ) -> None:
+        rev_display = rev_options.to_display()
+        logger.info(
+            "Checking out %s%s to %s",
+            url,
+            rev_display,
+            display_path(dest),
+        )
+        if verbosity <= 0:
+            flag = "--quiet"
+        else:
+            flag = ""
+        cmd_args = make_command(
+            "checkout",
+            flag,
+            self.get_remote_call_options(),
+            rev_options.to_args(),
+            url,
+            dest,
+        )
+        self.run_command(cmd_args)
+
+    def switch(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        cmd_args = make_command(
+            "switch",
+            self.get_remote_call_options(),
+            rev_options.to_args(),
+            url,
+            dest,
+        )
+        self.run_command(cmd_args)
+
+    def update(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        cmd_args = make_command(
+            "update",
+            self.get_remote_call_options(),
+            rev_options.to_args(),
+            dest,
+        )
+        self.run_command(cmd_args)
+
+
+vcs.register(Subversion)
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/vcs/versioncontrol.py b/venv/lib/python3.9/site-packages/pip/_internal/vcs/versioncontrol.py
new file mode 100644
index 0000000..02bbf68
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/vcs/versioncontrol.py
@@ -0,0 +1,705 @@
+"""Handles all VCS (version control) support"""
+
+import logging
+import os
+import shutil
+import sys
+import urllib.parse
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Mapping,
+    Optional,
+    Tuple,
+    Type,
+    Union,
+)
+
+from pip._internal.cli.spinners import SpinnerInterface
+from pip._internal.exceptions import BadCommand, InstallationError
+from pip._internal.utils.misc import (
+    HiddenText,
+    ask_path_exists,
+    backup_dir,
+    display_path,
+    hide_url,
+    hide_value,
+    is_installable_dir,
+    rmtree,
+)
+from pip._internal.utils.subprocess import (
+    CommandArgs,
+    call_subprocess,
+    format_command_args,
+    make_command,
+)
+from pip._internal.utils.urls import get_url_scheme
+
+if TYPE_CHECKING:
+    # Literal was introduced in Python 3.8.
+    #
+    # TODO: Remove `if TYPE_CHECKING` when dropping support for Python 3.7.
+    from typing import Literal
+
+
+__all__ = ["vcs"]
+
+
+logger = logging.getLogger(__name__)
+
+AuthInfo = Tuple[Optional[str], Optional[str]]
+
+
+def is_url(name: str) -> bool:
+    """
+    Return true if the name looks like a URL.
+    """
+    scheme = get_url_scheme(name)
+    if scheme is None:
+        return False
+    return scheme in ["http", "https", "file", "ftp"] + vcs.all_schemes
+
+
+def make_vcs_requirement_url(
+    repo_url: str, rev: str, project_name: str, subdir: Optional[str] = None
+) -> str:
+    """
+    Return the URL for a VCS requirement.
+
+    Args:
+      repo_url: the remote VCS url, with any needed VCS prefix (e.g. "git+").
+      project_name: the (unescaped) project name.
+    """
+    egg_project_name = project_name.replace("-", "_")
+    req = f"{repo_url}@{rev}#egg={egg_project_name}"
+    if subdir:
+        req += f"&subdirectory={subdir}"
+
+    return req
+
+
+def find_path_to_project_root_from_repo_root(
+    location: str, repo_root: str
+) -> Optional[str]:
+    """
+    Find the the Python project's root by searching up the filesystem from
+    `location`. Return the path to project root relative to `repo_root`.
+    Return None if the project root is `repo_root`, or cannot be found.
+    """
+    # find project root.
+    orig_location = location
+    while not is_installable_dir(location):
+        last_location = location
+        location = os.path.dirname(location)
+        if location == last_location:
+            # We've traversed up to the root of the filesystem without
+            # finding a Python project.
+            logger.warning(
+                "Could not find a Python project for directory %s (tried all "
+                "parent directories)",
+                orig_location,
+            )
+            return None
+
+    if os.path.samefile(repo_root, location):
+        return None
+
+    return os.path.relpath(location, repo_root)
+
+
+class RemoteNotFoundError(Exception):
+    pass
+
+
+class RemoteNotValidError(Exception):
+    def __init__(self, url: str):
+        super().__init__(url)
+        self.url = url
+
+
+class RevOptions:
+
+    """
+    Encapsulates a VCS-specific revision to install, along with any VCS
+    install options.
+
+    Instances of this class should be treated as if immutable.
+    """
+
+    def __init__(
+        self,
+        vc_class: Type["VersionControl"],
+        rev: Optional[str] = None,
+        extra_args: Optional[CommandArgs] = None,
+    ) -> None:
+        """
+        Args:
+          vc_class: a VersionControl subclass.
+          rev: the name of the revision to install.
+          extra_args: a list of extra options.
+        """
+        if extra_args is None:
+            extra_args = []
+
+        self.extra_args = extra_args
+        self.rev = rev
+        self.vc_class = vc_class
+        self.branch_name: Optional[str] = None
+
+    def __repr__(self) -> str:
+        return f"<RevOptions {self.vc_class.name}: rev={self.rev!r}>"
+
+    @property
+    def arg_rev(self) -> Optional[str]:
+        if self.rev is None:
+            return self.vc_class.default_arg_rev
+
+        return self.rev
+
+    def to_args(self) -> CommandArgs:
+        """
+        Return the VCS-specific command arguments.
+        """
+        args: CommandArgs = []
+        rev = self.arg_rev
+        if rev is not None:
+            args += self.vc_class.get_base_rev_args(rev)
+        args += self.extra_args
+
+        return args
+
+    def to_display(self) -> str:
+        if not self.rev:
+            return ""
+
+        return f" (to revision {self.rev})"
+
+    def make_new(self, rev: str) -> "RevOptions":
+        """
+        Make a copy of the current instance, but with a new rev.
+
+        Args:
+          rev: the name of the revision for the new object.
+        """
+        return self.vc_class.make_rev_options(rev, extra_args=self.extra_args)
+
+
+class VcsSupport:
+    _registry: Dict[str, "VersionControl"] = {}
+    schemes = ["ssh", "git", "hg", "bzr", "sftp", "svn"]
+
+    def __init__(self) -> None:
+        # Register more schemes with urlparse for various version control
+        # systems
+        urllib.parse.uses_netloc.extend(self.schemes)
+        super().__init__()
+
+    def __iter__(self) -> Iterator[str]:
+        return self._registry.__iter__()
+
+    @property
+    def backends(self) -> List["VersionControl"]:
+        return list(self._registry.values())
+
+    @property
+    def dirnames(self) -> List[str]:
+        return [backend.dirname for backend in self.backends]
+
+    @property
+    def all_schemes(self) -> List[str]:
+        schemes: List[str] = []
+        for backend in self.backends:
+            schemes.extend(backend.schemes)
+        return schemes
+
+    def register(self, cls: Type["VersionControl"]) -> None:
+        if not hasattr(cls, "name"):
+            logger.warning("Cannot register VCS %s", cls.__name__)
+            return
+        if cls.name not in self._registry:
+            self._registry[cls.name] = cls()
+            logger.debug("Registered VCS backend: %s", cls.name)
+
+    def unregister(self, name: str) -> None:
+        if name in self._registry:
+            del self._registry[name]
+
+    def get_backend_for_dir(self, location: str) -> Optional["VersionControl"]:
+        """
+        Return a VersionControl object if a repository of that type is found
+        at the given directory.
+        """
+        vcs_backends = {}
+        for vcs_backend in self._registry.values():
+            repo_path = vcs_backend.get_repository_root(location)
+            if not repo_path:
+                continue
+            logger.debug("Determine that %s uses VCS: %s", location, vcs_backend.name)
+            vcs_backends[repo_path] = vcs_backend
+
+        if not vcs_backends:
+            return None
+
+        # Choose the VCS in the inner-most directory. Since all repository
+        # roots found here would be either `location` or one of its
+        # parents, the longest path should have the most path components,
+        # i.e. the backend representing the inner-most repository.
+        inner_most_repo_path = max(vcs_backends, key=len)
+        return vcs_backends[inner_most_repo_path]
+
+    def get_backend_for_scheme(self, scheme: str) -> Optional["VersionControl"]:
+        """
+        Return a VersionControl object or None.
+        """
+        for vcs_backend in self._registry.values():
+            if scheme in vcs_backend.schemes:
+                return vcs_backend
+        return None
+
+    def get_backend(self, name: str) -> Optional["VersionControl"]:
+        """
+        Return a VersionControl object or None.
+        """
+        name = name.lower()
+        return self._registry.get(name)
+
+
+vcs = VcsSupport()
+
+
+class VersionControl:
+    name = ""
+    dirname = ""
+    repo_name = ""
+    # List of supported schemes for this Version Control
+    schemes: Tuple[str, ...] = ()
+    # Iterable of environment variable names to pass to call_subprocess().
+    unset_environ: Tuple[str, ...] = ()
+    default_arg_rev: Optional[str] = None
+
+    @classmethod
+    def should_add_vcs_url_prefix(cls, remote_url: str) -> bool:
+        """
+        Return whether the vcs prefix (e.g. "git+") should be added to a
+        repository's remote url when used in a requirement.
+        """
+        return not remote_url.lower().startswith(f"{cls.name}:")
+
+    @classmethod
+    def get_subdirectory(cls, location: str) -> Optional[str]:
+        """
+        Return the path to Python project root, relative to the repo root.
+        Return None if the project root is in the repo root.
+        """
+        return None
+
+    @classmethod
+    def get_requirement_revision(cls, repo_dir: str) -> str:
+        """
+        Return the revision string that should be used in a requirement.
+        """
+        return cls.get_revision(repo_dir)
+
+    @classmethod
+    def get_src_requirement(cls, repo_dir: str, project_name: str) -> str:
+        """
+        Return the requirement string to use to redownload the files
+        currently at the given repository directory.
+
+        Args:
+          project_name: the (unescaped) project name.
+
+        The return value has a form similar to the following:
+
+            {repository_url}@{revision}#egg={project_name}
+        """
+        repo_url = cls.get_remote_url(repo_dir)
+
+        if cls.should_add_vcs_url_prefix(repo_url):
+            repo_url = f"{cls.name}+{repo_url}"
+
+        revision = cls.get_requirement_revision(repo_dir)
+        subdir = cls.get_subdirectory(repo_dir)
+        req = make_vcs_requirement_url(repo_url, revision, project_name, subdir=subdir)
+
+        return req
+
+    @staticmethod
+    def get_base_rev_args(rev: str) -> List[str]:
+        """
+        Return the base revision arguments for a vcs command.
+
+        Args:
+          rev: the name of a revision to install.  Cannot be None.
+        """
+        raise NotImplementedError
+
+    def is_immutable_rev_checkout(self, url: str, dest: str) -> bool:
+        """
+        Return true if the commit hash checked out at dest matches
+        the revision in url.
+
+        Always return False, if the VCS does not support immutable commit
+        hashes.
+
+        This method does not check if there are local uncommitted changes
+        in dest after checkout, as pip currently has no use case for that.
+        """
+        return False
+
+    @classmethod
+    def make_rev_options(
+        cls, rev: Optional[str] = None, extra_args: Optional[CommandArgs] = None
+    ) -> RevOptions:
+        """
+        Return a RevOptions object.
+
+        Args:
+          rev: the name of a revision to install.
+          extra_args: a list of extra options.
+        """
+        return RevOptions(cls, rev, extra_args=extra_args)
+
+    @classmethod
+    def _is_local_repository(cls, repo: str) -> bool:
+        """
+        posix absolute paths start with os.path.sep,
+        win32 ones start with drive (like c:\\folder)
+        """
+        drive, tail = os.path.splitdrive(repo)
+        return repo.startswith(os.path.sep) or bool(drive)
+
+    @classmethod
+    def get_netloc_and_auth(
+        cls, netloc: str, scheme: str
+    ) -> Tuple[str, Tuple[Optional[str], Optional[str]]]:
+        """
+        Parse the repository URL's netloc, and return the new netloc to use
+        along with auth information.
+
+        Args:
+          netloc: the original repository URL netloc.
+          scheme: the repository URL's scheme without the vcs prefix.
+
+        This is mainly for the Subversion class to override, so that auth
+        information can be provided via the --username and --password options
+        instead of through the URL.  For other subclasses like Git without
+        such an option, auth information must stay in the URL.
+
+        Returns: (netloc, (username, password)).
+        """
+        return netloc, (None, None)
+
+    @classmethod
+    def get_url_rev_and_auth(cls, url: str) -> Tuple[str, Optional[str], AuthInfo]:
+        """
+        Parse the repository URL to use, and return the URL, revision,
+        and auth info to use.
+
+        Returns: (url, rev, (username, password)).
+        """
+        scheme, netloc, path, query, frag = urllib.parse.urlsplit(url)
+        if "+" not in scheme:
+            raise ValueError(
+                "Sorry, {!r} is a malformed VCS url. "
+                "The format is <vcs>+<protocol>://<url>, "
+                "e.g. svn+http://myrepo/svn/MyApp#egg=MyApp".format(url)
+            )
+        # Remove the vcs prefix.
+        scheme = scheme.split("+", 1)[1]
+        netloc, user_pass = cls.get_netloc_and_auth(netloc, scheme)
+        rev = None
+        if "@" in path:
+            path, rev = path.rsplit("@", 1)
+            if not rev:
+                raise InstallationError(
+                    "The URL {!r} has an empty revision (after @) "
+                    "which is not supported. Include a revision after @ "
+                    "or remove @ from the URL.".format(url)
+                )
+        url = urllib.parse.urlunsplit((scheme, netloc, path, query, ""))
+        return url, rev, user_pass
+
+    @staticmethod
+    def make_rev_args(
+        username: Optional[str], password: Optional[HiddenText]
+    ) -> CommandArgs:
+        """
+        Return the RevOptions "extra arguments" to use in obtain().
+        """
+        return []
+
+    def get_url_rev_options(self, url: HiddenText) -> Tuple[HiddenText, RevOptions]:
+        """
+        Return the URL and RevOptions object to use in obtain(),
+        as a tuple (url, rev_options).
+        """
+        secret_url, rev, user_pass = self.get_url_rev_and_auth(url.secret)
+        username, secret_password = user_pass
+        password: Optional[HiddenText] = None
+        if secret_password is not None:
+            password = hide_value(secret_password)
+        extra_args = self.make_rev_args(username, password)
+        rev_options = self.make_rev_options(rev, extra_args=extra_args)
+
+        return hide_url(secret_url), rev_options
+
+    @staticmethod
+    def normalize_url(url: str) -> str:
+        """
+        Normalize a URL for comparison by unquoting it and removing any
+        trailing slash.
+        """
+        return urllib.parse.unquote(url).rstrip("/")
+
+    @classmethod
+    def compare_urls(cls, url1: str, url2: str) -> bool:
+        """
+        Compare two repo URLs for identity, ignoring incidental differences.
+        """
+        return cls.normalize_url(url1) == cls.normalize_url(url2)
+
+    def fetch_new(
+        self, dest: str, url: HiddenText, rev_options: RevOptions, verbosity: int
+    ) -> None:
+        """
+        Fetch a revision from a repository, in the case that this is the
+        first fetch from the repository.
+
+        Args:
+          dest: the directory to fetch the repository to.
+          rev_options: a RevOptions object.
+          verbosity: verbosity level.
+        """
+        raise NotImplementedError
+
+    def switch(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        """
+        Switch the repo at ``dest`` to point to ``URL``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    def update(self, dest: str, url: HiddenText, rev_options: RevOptions) -> None:
+        """
+        Update an already-existing repo to the given ``rev_options``.
+
+        Args:
+          rev_options: a RevOptions object.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def is_commit_id_equal(cls, dest: str, name: Optional[str]) -> bool:
+        """
+        Return whether the id of the current commit equals the given name.
+
+        Args:
+          dest: the repository directory.
+          name: a string name.
+        """
+        raise NotImplementedError
+
+    def obtain(self, dest: str, url: HiddenText, verbosity: int) -> None:
+        """
+        Install or update in editable mode the package represented by this
+        VersionControl object.
+
+        :param dest: the repository directory in which to install or update.
+        :param url: the repository URL starting with a vcs prefix.
+        :param verbosity: verbosity level.
+        """
+        url, rev_options = self.get_url_rev_options(url)
+
+        if not os.path.exists(dest):
+            self.fetch_new(dest, url, rev_options, verbosity=verbosity)
+            return
+
+        rev_display = rev_options.to_display()
+        if self.is_repository_directory(dest):
+            existing_url = self.get_remote_url(dest)
+            if self.compare_urls(existing_url, url.secret):
+                logger.debug(
+                    "%s in %s exists, and has correct URL (%s)",
+                    self.repo_name.title(),
+                    display_path(dest),
+                    url,
+                )
+                if not self.is_commit_id_equal(dest, rev_options.rev):
+                    logger.info(
+                        "Updating %s %s%s",
+                        display_path(dest),
+                        self.repo_name,
+                        rev_display,
+                    )
+                    self.update(dest, url, rev_options)
+                else:
+                    logger.info("Skipping because already up-to-date.")
+                return
+
+            logger.warning(
+                "%s %s in %s exists with URL %s",
+                self.name,
+                self.repo_name,
+                display_path(dest),
+                existing_url,
+            )
+            prompt = ("(s)witch, (i)gnore, (w)ipe, (b)ackup ", ("s", "i", "w", "b"))
+        else:
+            logger.warning(
+                "Directory %s already exists, and is not a %s %s.",
+                dest,
+                self.name,
+                self.repo_name,
+            )
+            # https://github.com/python/mypy/issues/1174
+            prompt = ("(i)gnore, (w)ipe, (b)ackup ", ("i", "w", "b"))  # type: ignore
+
+        logger.warning(
+            "The plan is to install the %s repository %s",
+            self.name,
+            url,
+        )
+        response = ask_path_exists("What to do?  {}".format(prompt[0]), prompt[1])
+
+        if response == "a":
+            sys.exit(-1)
+
+        if response == "w":
+            logger.warning("Deleting %s", display_path(dest))
+            rmtree(dest)
+            self.fetch_new(dest, url, rev_options, verbosity=verbosity)
+            return
+
+        if response == "b":
+            dest_dir = backup_dir(dest)
+            logger.warning("Backing up %s to %s", display_path(dest), dest_dir)
+            shutil.move(dest, dest_dir)
+            self.fetch_new(dest, url, rev_options, verbosity=verbosity)
+            return
+
+        # Do nothing if the response is "i".
+        if response == "s":
+            logger.info(
+                "Switching %s %s to %s%s",
+                self.repo_name,
+                display_path(dest),
+                url,
+                rev_display,
+            )
+            self.switch(dest, url, rev_options)
+
+    def unpack(self, location: str, url: HiddenText, verbosity: int) -> None:
+        """
+        Clean up current location and download the url repository
+        (and vcs infos) into location
+
+        :param url: the repository URL starting with a vcs prefix.
+        :param verbosity: verbosity level.
+        """
+        if os.path.exists(location):
+            rmtree(location)
+        self.obtain(location, url=url, verbosity=verbosity)
+
+    @classmethod
+    def get_remote_url(cls, location: str) -> str:
+        """
+        Return the url used at location
+
+        Raises RemoteNotFoundError if the repository does not have a remote
+        url configured.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def get_revision(cls, location: str) -> str:
+        """
+        Return the current commit id of the files at the given location.
+        """
+        raise NotImplementedError
+
+    @classmethod
+    def run_command(
+        cls,
+        cmd: Union[List[str], CommandArgs],
+        show_stdout: bool = True,
+        cwd: Optional[str] = None,
+        on_returncode: 'Literal["raise", "warn", "ignore"]' = "raise",
+        extra_ok_returncodes: Optional[Iterable[int]] = None,
+        command_desc: Optional[str] = None,
+        extra_environ: Optional[Mapping[str, Any]] = None,
+        spinner: Optional[SpinnerInterface] = None,
+        log_failed_cmd: bool = True,
+        stdout_only: bool = False,
+    ) -> str:
+        """
+        Run a VCS subcommand
+        This is simply a wrapper around call_subprocess that adds the VCS
+        command name, and checks that the VCS is available
+        """
+        cmd = make_command(cls.name, *cmd)
+        if command_desc is None:
+            command_desc = format_command_args(cmd)
+        try:
+            return call_subprocess(
+                cmd,
+                show_stdout,
+                cwd,
+                on_returncode=on_returncode,
+                extra_ok_returncodes=extra_ok_returncodes,
+                command_desc=command_desc,
+                extra_environ=extra_environ,
+                unset_environ=cls.unset_environ,
+                spinner=spinner,
+                log_failed_cmd=log_failed_cmd,
+                stdout_only=stdout_only,
+            )
+        except FileNotFoundError:
+            # errno.ENOENT = no such file or directory
+            # In other words, the VCS executable isn't available
+            raise BadCommand(
+                f"Cannot find command {cls.name!r} - do you have "
+                f"{cls.name!r} installed and in your PATH?"
+            )
+        except PermissionError:
+            # errno.EACCES = Permission denied
+            # This error occurs, for instance, when the command is installed
+            # only for another user. So, the current user don't have
+            # permission to call the other user command.
+            raise BadCommand(
+                f"No permission to execute {cls.name!r} - install it "
+                f"locally, globally (ask admin), or check your PATH. "
+                f"See possible solutions at "
+                f"https://pip.pypa.io/en/latest/reference/pip_freeze/"
+                f"#fixing-permission-denied."
+            )
+
+    @classmethod
+    def is_repository_directory(cls, path: str) -> bool:
+        """
+        Return whether a directory path is a repository directory.
+        """
+        logger.debug("Checking in %s for %s (%s)...", path, cls.dirname, cls.name)
+        return os.path.exists(os.path.join(path, cls.dirname))
+
+    @classmethod
+    def get_repository_root(cls, location: str) -> Optional[str]:
+        """
+        Return the "root" (top-level) directory controlled by the vcs,
+        or `None` if the directory is not in any.
+
+        It is meant to be overridden to implement smarter detection
+        mechanisms for specific vcs.
+
+        This can do more than is_repository_directory() alone. For
+        example, the Git override checks that Git is actually available.
+        """
+        if cls.is_repository_directory(location):
+            return location
+        return None
diff --git a/venv/lib/python3.9/site-packages/pip/_internal/wheel_builder.py b/venv/lib/python3.9/site-packages/pip/_internal/wheel_builder.py
new file mode 100644
index 0000000..15b30af
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_internal/wheel_builder.py
@@ -0,0 +1,382 @@
+"""Orchestrator for building wheels from InstallRequirements.
+"""
+
+import logging
+import os.path
+import re
+import shutil
+from typing import Callable, Iterable, List, Optional, Tuple
+
+from pip._vendor.packaging.utils import canonicalize_name, canonicalize_version
+from pip._vendor.packaging.version import InvalidVersion, Version
+
+from pip._internal.cache import WheelCache
+from pip._internal.exceptions import InvalidWheelFilename, UnsupportedWheel
+from pip._internal.metadata import FilesystemWheel, get_wheel_distribution
+from pip._internal.models.link import Link
+from pip._internal.models.wheel import Wheel
+from pip._internal.operations.build.wheel import build_wheel_pep517
+from pip._internal.operations.build.wheel_editable import build_wheel_editable
+from pip._internal.operations.build.wheel_legacy import build_wheel_legacy
+from pip._internal.req.req_install import InstallRequirement
+from pip._internal.utils.deprecation import (
+    LegacyInstallReasonMissingWheelPackage,
+    LegacyInstallReasonNoBinaryForcesSetuptoolsInstall,
+)
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import ensure_dir, hash_file, is_wheel_installed
+from pip._internal.utils.setuptools_build import make_setuptools_clean_args
+from pip._internal.utils.subprocess import call_subprocess
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.urls import path_to_url
+from pip._internal.vcs import vcs
+
+logger = logging.getLogger(__name__)
+
+_egg_info_re = re.compile(r"([a-z0-9_.]+)-([a-z0-9_.!+-]+)", re.IGNORECASE)
+
+BdistWheelAllowedPredicate = Callable[[InstallRequirement], bool]
+BuildResult = Tuple[List[InstallRequirement], List[InstallRequirement]]
+
+
+def _contains_egg_info(s: str) -> bool:
+    """Determine whether the string looks like an egg_info.
+
+    :param s: The string to parse. E.g. foo-2.1
+    """
+    return bool(_egg_info_re.search(s))
+
+
+def _should_build(
+    req: InstallRequirement,
+    need_wheel: bool,
+    check_bdist_wheel: Optional[BdistWheelAllowedPredicate] = None,
+) -> bool:
+    """Return whether an InstallRequirement should be built into a wheel."""
+    if req.constraint:
+        # never build requirements that are merely constraints
+        return False
+    if req.is_wheel:
+        if need_wheel:
+            logger.info(
+                "Skipping %s, due to already being wheel.",
+                req.name,
+            )
+        return False
+
+    if need_wheel:
+        # i.e. pip wheel, not pip install
+        return True
+
+    # From this point, this concerns the pip install command only
+    # (need_wheel=False).
+
+    if not req.source_dir:
+        return False
+
+    if req.editable:
+        # we only build PEP 660 editable requirements
+        return req.supports_pyproject_editable()
+
+    if req.use_pep517:
+        return True
+
+    assert check_bdist_wheel is not None
+    if not check_bdist_wheel(req):
+        # /!\ When we change this to unconditionally return True, we must also remove
+        # support for `--install-option`. Indeed, `--install-option` implies
+        # `--no-binary` so we can return False here and run `setup.py install`.
+        # `--global-option` and `--build-option` can remain until we drop support for
+        # building with `setup.py bdist_wheel`.
+        req.legacy_install_reason = LegacyInstallReasonNoBinaryForcesSetuptoolsInstall
+        return False
+
+    if not is_wheel_installed():
+        # we don't build legacy requirements if wheel is not installed
+        req.legacy_install_reason = LegacyInstallReasonMissingWheelPackage
+        return False
+
+    return True
+
+
+def should_build_for_wheel_command(
+    req: InstallRequirement,
+) -> bool:
+    return _should_build(req, need_wheel=True)
+
+
+def should_build_for_install_command(
+    req: InstallRequirement,
+    check_bdist_wheel_allowed: BdistWheelAllowedPredicate,
+) -> bool:
+    return _should_build(
+        req, need_wheel=False, check_bdist_wheel=check_bdist_wheel_allowed
+    )
+
+
+def _should_cache(
+    req: InstallRequirement,
+) -> Optional[bool]:
+    """
+    Return whether a built InstallRequirement can be stored in the persistent
+    wheel cache, assuming the wheel cache is available, and _should_build()
+    has determined a wheel needs to be built.
+    """
+    if req.editable or not req.source_dir:
+        # never cache editable requirements
+        return False
+
+    if req.link and req.link.is_vcs:
+        # VCS checkout. Do not cache
+        # unless it points to an immutable commit hash.
+        assert not req.editable
+        assert req.source_dir
+        vcs_backend = vcs.get_backend_for_scheme(req.link.scheme)
+        assert vcs_backend
+        if vcs_backend.is_immutable_rev_checkout(req.link.url, req.source_dir):
+            return True
+        return False
+
+    assert req.link
+    base, ext = req.link.splitext()
+    if _contains_egg_info(base):
+        return True
+
+    # Otherwise, do not cache.
+    return False
+
+
+def _get_cache_dir(
+    req: InstallRequirement,
+    wheel_cache: WheelCache,
+) -> str:
+    """Return the persistent or temporary cache directory where the built
+    wheel need to be stored.
+    """
+    cache_available = bool(wheel_cache.cache_dir)
+    assert req.link
+    if cache_available and _should_cache(req):
+        cache_dir = wheel_cache.get_path_for_link(req.link)
+    else:
+        cache_dir = wheel_cache.get_ephem_path_for_link(req.link)
+    return cache_dir
+
+
+def _verify_one(req: InstallRequirement, wheel_path: str) -> None:
+    canonical_name = canonicalize_name(req.name or "")
+    w = Wheel(os.path.basename(wheel_path))
+    if canonicalize_name(w.name) != canonical_name:
+        raise InvalidWheelFilename(
+            "Wheel has unexpected file name: expected {!r}, "
+            "got {!r}".format(canonical_name, w.name),
+        )
+    dist = get_wheel_distribution(FilesystemWheel(wheel_path), canonical_name)
+    dist_verstr = str(dist.version)
+    if canonicalize_version(dist_verstr) != canonicalize_version(w.version):
+        raise InvalidWheelFilename(
+            "Wheel has unexpected file name: expected {!r}, "
+            "got {!r}".format(dist_verstr, w.version),
+        )
+    metadata_version_value = dist.metadata_version
+    if metadata_version_value is None:
+        raise UnsupportedWheel("Missing Metadata-Version")
+    try:
+        metadata_version = Version(metadata_version_value)
+    except InvalidVersion:
+        msg = f"Invalid Metadata-Version: {metadata_version_value}"
+        raise UnsupportedWheel(msg)
+    if metadata_version >= Version("1.2") and not isinstance(dist.version, Version):
+        raise UnsupportedWheel(
+            "Metadata 1.2 mandates PEP 440 version, "
+            "but {!r} is not".format(dist_verstr)
+        )
+
+
+def _build_one(
+    req: InstallRequirement,
+    output_dir: str,
+    verify: bool,
+    build_options: List[str],
+    global_options: List[str],
+    editable: bool,
+) -> Optional[str]:
+    """Build one wheel.
+
+    :return: The filename of the built wheel, or None if the build failed.
+    """
+    artifact = "editable" if editable else "wheel"
+    try:
+        ensure_dir(output_dir)
+    except OSError as e:
+        logger.warning(
+            "Building %s for %s failed: %s",
+            artifact,
+            req.name,
+            e,
+        )
+        return None
+
+    # Install build deps into temporary directory (PEP 518)
+    with req.build_env:
+        wheel_path = _build_one_inside_env(
+            req, output_dir, build_options, global_options, editable
+        )
+    if wheel_path and verify:
+        try:
+            _verify_one(req, wheel_path)
+        except (InvalidWheelFilename, UnsupportedWheel) as e:
+            logger.warning("Built %s for %s is invalid: %s", artifact, req.name, e)
+            return None
+    return wheel_path
+
+
+def _build_one_inside_env(
+    req: InstallRequirement,
+    output_dir: str,
+    build_options: List[str],
+    global_options: List[str],
+    editable: bool,
+) -> Optional[str]:
+    with TempDirectory(kind="wheel") as temp_dir:
+        assert req.name
+        if req.use_pep517:
+            assert req.metadata_directory
+            assert req.pep517_backend
+            if global_options:
+                logger.warning(
+                    "Ignoring --global-option when building %s using PEP 517", req.name
+                )
+            if build_options:
+                logger.warning(
+                    "Ignoring --build-option when building %s using PEP 517", req.name
+                )
+            if editable:
+                wheel_path = build_wheel_editable(
+                    name=req.name,
+                    backend=req.pep517_backend,
+                    metadata_directory=req.metadata_directory,
+                    tempd=temp_dir.path,
+                )
+            else:
+                wheel_path = build_wheel_pep517(
+                    name=req.name,
+                    backend=req.pep517_backend,
+                    metadata_directory=req.metadata_directory,
+                    tempd=temp_dir.path,
+                )
+        else:
+            wheel_path = build_wheel_legacy(
+                name=req.name,
+                setup_py_path=req.setup_py_path,
+                source_dir=req.unpacked_source_directory,
+                global_options=global_options,
+                build_options=build_options,
+                tempd=temp_dir.path,
+            )
+
+        if wheel_path is not None:
+            wheel_name = os.path.basename(wheel_path)
+            dest_path = os.path.join(output_dir, wheel_name)
+            try:
+                wheel_hash, length = hash_file(wheel_path)
+                shutil.move(wheel_path, dest_path)
+                logger.info(
+                    "Created wheel for %s: filename=%s size=%d sha256=%s",
+                    req.name,
+                    wheel_name,
+                    length,
+                    wheel_hash.hexdigest(),
+                )
+                logger.info("Stored in directory: %s", output_dir)
+                return dest_path
+            except Exception as e:
+                logger.warning(
+                    "Building wheel for %s failed: %s",
+                    req.name,
+                    e,
+                )
+        # Ignore return, we can't do anything else useful.
+        if not req.use_pep517:
+            _clean_one_legacy(req, global_options)
+        return None
+
+
+def _clean_one_legacy(req: InstallRequirement, global_options: List[str]) -> bool:
+    clean_args = make_setuptools_clean_args(
+        req.setup_py_path,
+        global_options=global_options,
+    )
+
+    logger.info("Running setup.py clean for %s", req.name)
+    try:
+        call_subprocess(
+            clean_args, command_desc="python setup.py clean", cwd=req.source_dir
+        )
+        return True
+    except Exception:
+        logger.error("Failed cleaning build dir for %s", req.name)
+        return False
+
+
+def build(
+    requirements: Iterable[InstallRequirement],
+    wheel_cache: WheelCache,
+    verify: bool,
+    build_options: List[str],
+    global_options: List[str],
+) -> BuildResult:
+    """Build wheels.
+
+    :return: The list of InstallRequirement that succeeded to build and
+        the list of InstallRequirement that failed to build.
+    """
+    if not requirements:
+        return [], []
+
+    # Build the wheels.
+    logger.info(
+        "Building wheels for collected packages: %s",
+        ", ".join(req.name for req in requirements),  # type: ignore
+    )
+
+    with indent_log():
+        build_successes, build_failures = [], []
+        for req in requirements:
+            assert req.name
+            cache_dir = _get_cache_dir(req, wheel_cache)
+            wheel_file = _build_one(
+                req,
+                cache_dir,
+                verify,
+                build_options,
+                global_options,
+                req.editable and req.permit_editable_wheels,
+            )
+            if wheel_file:
+                # Record the download origin in the cache
+                if req.download_info is not None:
+                    # download_info is guaranteed to be set because when we build an
+                    # InstallRequirement it has been through the preparer before, but
+                    # let's be cautious.
+                    wheel_cache.record_download_origin(cache_dir, req.download_info)
+                # Update the link for this.
+                req.link = Link(path_to_url(wheel_file))
+                req.local_file_path = req.link.file_path
+                assert req.link.is_wheel
+                build_successes.append(req)
+            else:
+                build_failures.append(req)
+
+    # notify success/failure
+    if build_successes:
+        logger.info(
+            "Successfully built %s",
+            " ".join([req.name for req in build_successes]),  # type: ignore
+        )
+    if build_failures:
+        logger.info(
+            "Failed to build %s",
+            " ".join([req.name for req in build_failures]),  # type: ignore
+        )
+    # Return a list of requirements that failed to build
+    return build_successes, build_failures
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/__init__.py
new file mode 100644
index 0000000..b22f7ab
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/__init__.py
@@ -0,0 +1,120 @@
+"""
+pip._vendor is for vendoring dependencies of pip to prevent needing pip to
+depend on something external.
+
+Files inside of pip._vendor should be considered immutable and should only be
+updated to versions from upstream.
+"""
+from __future__ import absolute_import
+
+import glob
+import os.path
+import sys
+
+# Downstream redistributors which have debundled our dependencies should also
+# patch this value to be true. This will trigger the additional patching
+# to cause things like "six" to be available as pip.
+DEBUNDLED = False
+
+# By default, look in this directory for a bunch of .whl files which we will
+# add to the beginning of sys.path before attempting to import anything. This
+# is done to support downstream re-distributors like Debian and Fedora who
+# wish to create their own Wheels for our dependencies to aid in debundling.
+WHEEL_DIR = os.path.abspath(os.path.dirname(__file__))
+
+
+# Define a small helper function to alias our vendored modules to the real ones
+# if the vendored ones do not exist. This idea of this was taken from
+# https://github.com/kennethreitz/requests/pull/2567.
+def vendored(modulename):
+    vendored_name = "{0}.{1}".format(__name__, modulename)
+
+    try:
+        __import__(modulename, globals(), locals(), level=0)
+    except ImportError:
+        # We can just silently allow import failures to pass here. If we
+        # got to this point it means that ``import pip._vendor.whatever``
+        # failed and so did ``import whatever``. Since we're importing this
+        # upfront in an attempt to alias imports, not erroring here will
+        # just mean we get a regular import error whenever pip *actually*
+        # tries to import one of these modules to use it, which actually
+        # gives us a better error message than we would have otherwise
+        # gotten.
+        pass
+    else:
+        sys.modules[vendored_name] = sys.modules[modulename]
+        base, head = vendored_name.rsplit(".", 1)
+        setattr(sys.modules[base], head, sys.modules[modulename])
+
+
+# If we're operating in a debundled setup, then we want to go ahead and trigger
+# the aliasing of our vendored libraries as well as looking for wheels to add
+# to our sys.path. This will cause all of this code to be a no-op typically
+# however downstream redistributors can enable it in a consistent way across
+# all platforms.
+if DEBUNDLED:
+    # Actually look inside of WHEEL_DIR to find .whl files and add them to the
+    # front of our sys.path.
+    sys.path[:] = glob.glob(os.path.join(WHEEL_DIR, "*.whl")) + sys.path
+
+    # Actually alias all of our vendored dependencies.
+    vendored("cachecontrol")
+    vendored("certifi")
+    vendored("colorama")
+    vendored("distlib")
+    vendored("distro")
+    vendored("six")
+    vendored("six.moves")
+    vendored("six.moves.urllib")
+    vendored("six.moves.urllib.parse")
+    vendored("packaging")
+    vendored("packaging.version")
+    vendored("packaging.specifiers")
+    vendored("pep517")
+    vendored("pkg_resources")
+    vendored("platformdirs")
+    vendored("progress")
+    vendored("requests")
+    vendored("requests.exceptions")
+    vendored("requests.packages")
+    vendored("requests.packages.urllib3")
+    vendored("requests.packages.urllib3._collections")
+    vendored("requests.packages.urllib3.connection")
+    vendored("requests.packages.urllib3.connectionpool")
+    vendored("requests.packages.urllib3.contrib")
+    vendored("requests.packages.urllib3.contrib.ntlmpool")
+    vendored("requests.packages.urllib3.contrib.pyopenssl")
+    vendored("requests.packages.urllib3.exceptions")
+    vendored("requests.packages.urllib3.fields")
+    vendored("requests.packages.urllib3.filepost")
+    vendored("requests.packages.urllib3.packages")
+    vendored("requests.packages.urllib3.packages.ordered_dict")
+    vendored("requests.packages.urllib3.packages.six")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname")
+    vendored("requests.packages.urllib3.packages.ssl_match_hostname."
+             "_implementation")
+    vendored("requests.packages.urllib3.poolmanager")
+    vendored("requests.packages.urllib3.request")
+    vendored("requests.packages.urllib3.response")
+    vendored("requests.packages.urllib3.util")
+    vendored("requests.packages.urllib3.util.connection")
+    vendored("requests.packages.urllib3.util.request")
+    vendored("requests.packages.urllib3.util.response")
+    vendored("requests.packages.urllib3.util.retry")
+    vendored("requests.packages.urllib3.util.ssl_")
+    vendored("requests.packages.urllib3.util.timeout")
+    vendored("requests.packages.urllib3.util.url")
+    vendored("resolvelib")
+    vendored("rich")
+    vendored("rich.console")
+    vendored("rich.highlighter")
+    vendored("rich.logging")
+    vendored("rich.markup")
+    vendored("rich.progress")
+    vendored("rich.segment")
+    vendored("rich.style")
+    vendored("rich.text")
+    vendored("rich.traceback")
+    vendored("tenacity")
+    vendored("tomli")
+    vendored("urllib3")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/__pycache__/typing_extensions.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/__pycache__/typing_extensions.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__init__.py
new file mode 100644
index 0000000..f631ae6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__init__.py
@@ -0,0 +1,18 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+"""CacheControl import Interface.
+
+Make it easy to import from cachecontrol without long namespaces.
+"""
+__author__ = "Eric Larson"
+__email__ = "eric@ionrock.org"
+__version__ = "0.12.11"
+
+from .wrapper import CacheControl
+from .adapter import CacheControlAdapter
+from .controller import CacheController
+
+import logging
+logging.getLogger(__name__).addHandler(logging.NullHandler())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-39.pyc
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/serialize.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/wrapper.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/__pycache__/wrapper.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/_cmd.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/_cmd.py
new file mode 100644
index 0000000..4266b5e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/_cmd.py
@@ -0,0 +1,61 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import logging
+
+from pip._vendor import requests
+
+from pip._vendor.cachecontrol.adapter import CacheControlAdapter
+from pip._vendor.cachecontrol.cache import DictCache
+from pip._vendor.cachecontrol.controller import logger
+
+from argparse import ArgumentParser
+
+
+def setup_logging():
+    logger.setLevel(logging.DEBUG)
+    handler = logging.StreamHandler()
+    logger.addHandler(handler)
+
+
+def get_session():
+    adapter = CacheControlAdapter(
+        DictCache(), cache_etags=True, serializer=None, heuristic=None
+    )
+    sess = requests.Session()
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    sess.cache_controller = adapter.controller
+    return sess
+
+
+def get_args():
+    parser = ArgumentParser()
+    parser.add_argument("url", help="The URL to try and cache")
+    return parser.parse_args()
+
+
+def main(args=None):
+    args = get_args()
+    sess = get_session()
+
+    # Make a request to get a response
+    resp = sess.get(args.url)
+
+    # Turn on logging
+    setup_logging()
+
+    # try setting the cache
+    sess.cache_controller.cache_response(resp.request, resp.raw)
+
+    # Now try to get it
+    if sess.cache_controller.cached_request(resp.request):
+        print("Cached!")
+    else:
+        print("Not cached :(")
+
+
+if __name__ == "__main__":
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/adapter.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/adapter.py
new file mode 100644
index 0000000..94c75e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/adapter.py
@@ -0,0 +1,137 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import types
+import functools
+import zlib
+
+from pip._vendor.requests.adapters import HTTPAdapter
+
+from .controller import CacheController, PERMANENT_REDIRECT_STATUSES
+from .cache import DictCache
+from .filewrapper import CallbackFileWrapper
+
+
+class CacheControlAdapter(HTTPAdapter):
+    invalidating_methods = {"PUT", "PATCH", "DELETE"}
+
+    def __init__(
+        self,
+        cache=None,
+        cache_etags=True,
+        controller_class=None,
+        serializer=None,
+        heuristic=None,
+        cacheable_methods=None,
+        *args,
+        **kw
+    ):
+        super(CacheControlAdapter, self).__init__(*args, **kw)
+        self.cache = DictCache() if cache is None else cache
+        self.heuristic = heuristic
+        self.cacheable_methods = cacheable_methods or ("GET",)
+
+        controller_factory = controller_class or CacheController
+        self.controller = controller_factory(
+            self.cache, cache_etags=cache_etags, serializer=serializer
+        )
+
+    def send(self, request, cacheable_methods=None, **kw):
+        """
+        Send a request. Use the request information to see if it
+        exists in the cache and cache the response if we need to and can.
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if request.method in cacheable:
+            try:
+                cached_response = self.controller.cached_request(request)
+            except zlib.error:
+                cached_response = None
+            if cached_response:
+                return self.build_response(request, cached_response, from_cache=True)
+
+            # check for etags and add headers if appropriate
+            request.headers.update(self.controller.conditional_headers(request))
+
+        resp = super(CacheControlAdapter, self).send(request, **kw)
+
+        return resp
+
+    def build_response(
+        self, request, response, from_cache=False, cacheable_methods=None
+    ):
+        """
+        Build a response by making a request or using the cache.
+
+        This will end up calling send and returning a potentially
+        cached response
+        """
+        cacheable = cacheable_methods or self.cacheable_methods
+        if not from_cache and request.method in cacheable:
+            # Check for any heuristics that might update headers
+            # before trying to cache.
+            if self.heuristic:
+                response = self.heuristic.apply(response)
+
+            # apply any expiration heuristics
+            if response.status == 304:
+                # We must have sent an ETag request. This could mean
+                # that we've been expired already or that we simply
+                # have an etag. In either case, we want to try and
+                # update the cache if that is the case.
+                cached_response = self.controller.update_cached_response(
+                    request, response
+                )
+
+                if cached_response is not response:
+                    from_cache = True
+
+                # We are done with the server response, read a
+                # possible response body (compliant servers will
+                # not return one, but we cannot be 100% sure) and
+                # release the connection back to the pool.
+                response.read(decode_content=False)
+                response.release_conn()
+
+                response = cached_response
+
+            # We always cache the 301 responses
+            elif int(response.status) in PERMANENT_REDIRECT_STATUSES:
+                self.controller.cache_response(request, response)
+            else:
+                # Wrap the response file with a wrapper that will cache the
+                #   response when the stream has been consumed.
+                response._fp = CallbackFileWrapper(
+                    response._fp,
+                    functools.partial(
+                        self.controller.cache_response, request, response
+                    ),
+                )
+                if response.chunked:
+                    super_update_chunk_length = response._update_chunk_length
+
+                    def _update_chunk_length(self):
+                        super_update_chunk_length()
+                        if self.chunk_left == 0:
+                            self._fp._close()
+
+                    response._update_chunk_length = types.MethodType(
+                        _update_chunk_length, response
+                    )
+
+        resp = super(CacheControlAdapter, self).build_response(request, response)
+
+        # See if we should invalidate the cache.
+        if request.method in self.invalidating_methods and resp.ok:
+            cache_url = self.controller.cache_url(request.url)
+            self.cache.delete(cache_url)
+
+        # Give the request a from_cache attr to let people use it
+        resp.from_cache = from_cache
+
+        return resp
+
+    def close(self):
+        self.cache.close()
+        super(CacheControlAdapter, self).close()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/cache.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/cache.py
new file mode 100644
index 0000000..2a965f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/cache.py
@@ -0,0 +1,65 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+The cache object API for implementing caches. The default is a thread
+safe in-memory dictionary.
+"""
+from threading import Lock
+
+
+class BaseCache(object):
+
+    def get(self, key):
+        raise NotImplementedError()
+
+    def set(self, key, value, expires=None):
+        raise NotImplementedError()
+
+    def delete(self, key):
+        raise NotImplementedError()
+
+    def close(self):
+        pass
+
+
+class DictCache(BaseCache):
+
+    def __init__(self, init_dict=None):
+        self.lock = Lock()
+        self.data = init_dict or {}
+
+    def get(self, key):
+        return self.data.get(key, None)
+
+    def set(self, key, value, expires=None):
+        with self.lock:
+            self.data.update({key: value})
+
+    def delete(self, key):
+        with self.lock:
+            if key in self.data:
+                self.data.pop(key)
+
+
+class SeparateBodyBaseCache(BaseCache):
+    """
+    In this variant, the body is not stored mixed in with the metadata, but is
+    passed in (as a bytes-like object) in a separate call to ``set_body()``.
+
+    That is, the expected interaction pattern is::
+
+        cache.set(key, serialized_metadata)
+        cache.set_body(key)
+
+    Similarly, the body should be loaded separately via ``get_body()``.
+    """
+    def set_body(self, key, body):
+        raise NotImplementedError()
+
+    def get_body(self, key):
+        """
+        Return the body as file-like object.
+        """
+        raise NotImplementedError()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
new file mode 100644
index 0000000..3782729
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__init__.py
@@ -0,0 +1,9 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from .file_cache import FileCache, SeparateBodyFileCache
+from .redis_cache import RedisCache
+
+
+__all__ = ["FileCache", "SeparateBodyFileCache", "RedisCache"]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-39.pyc
new file mode 100644
index 0000000..b3d0db8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/file_cache.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-39.pyc
new file mode 100644
index 0000000..188ee14
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/__pycache__/redis_cache.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
new file mode 100644
index 0000000..f1ddb2e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/file_cache.py
@@ -0,0 +1,188 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import hashlib
+import os
+from textwrap import dedent
+
+from ..cache import BaseCache, SeparateBodyBaseCache
+from ..controller import CacheController
+
+try:
+    FileNotFoundError
+except NameError:
+    # py2.X
+    FileNotFoundError = (IOError, OSError)
+
+
+def _secure_open_write(filename, fmode):
+    # We only want to write to this file, so open it in write only mode
+    flags = os.O_WRONLY
+
+    # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only
+    #  will open *new* files.
+    # We specify this because we want to ensure that the mode we pass is the
+    # mode of the file.
+    flags |= os.O_CREAT | os.O_EXCL
+
+    # Do not follow symlinks to prevent someone from making a symlink that
+    # we follow and insecurely open a cache file.
+    if hasattr(os, "O_NOFOLLOW"):
+        flags |= os.O_NOFOLLOW
+
+    # On Windows we'll mark this file as binary
+    if hasattr(os, "O_BINARY"):
+        flags |= os.O_BINARY
+
+    # Before we open our file, we want to delete any existing file that is
+    # there
+    try:
+        os.remove(filename)
+    except (IOError, OSError):
+        # The file must not exist already, so we can just skip ahead to opening
+        pass
+
+    # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a
+    # race condition happens between the os.remove and this line, that an
+    # error will be raised. Because we utilize a lockfile this should only
+    # happen if someone is attempting to attack us.
+    fd = os.open(filename, flags, fmode)
+    try:
+        return os.fdopen(fd, "wb")
+
+    except:
+        # An error occurred wrapping our FD in a file object
+        os.close(fd)
+        raise
+
+
+class _FileCacheMixin:
+    """Shared implementation for both FileCache variants."""
+
+    def __init__(
+        self,
+        directory,
+        forever=False,
+        filemode=0o0600,
+        dirmode=0o0700,
+        use_dir_lock=None,
+        lock_class=None,
+    ):
+
+        if use_dir_lock is not None and lock_class is not None:
+            raise ValueError("Cannot use use_dir_lock and lock_class together")
+
+        try:
+            from lockfile import LockFile
+            from lockfile.mkdirlockfile import MkdirLockFile
+        except ImportError:
+            notice = dedent(
+                """
+            NOTE: In order to use the FileCache you must have
+            lockfile installed. You can install it via pip:
+              pip install lockfile
+            """
+            )
+            raise ImportError(notice)
+
+        else:
+            if use_dir_lock:
+                lock_class = MkdirLockFile
+
+            elif lock_class is None:
+                lock_class = LockFile
+
+        self.directory = directory
+        self.forever = forever
+        self.filemode = filemode
+        self.dirmode = dirmode
+        self.lock_class = lock_class
+
+    @staticmethod
+    def encode(x):
+        return hashlib.sha224(x.encode()).hexdigest()
+
+    def _fn(self, name):
+        # NOTE: This method should not change as some may depend on it.
+        #       See: https://github.com/ionrock/cachecontrol/issues/63
+        hashed = self.encode(name)
+        parts = list(hashed[:5]) + [hashed]
+        return os.path.join(self.directory, *parts)
+
+    def get(self, key):
+        name = self._fn(key)
+        try:
+            with open(name, "rb") as fh:
+                return fh.read()
+
+        except FileNotFoundError:
+            return None
+
+    def set(self, key, value, expires=None):
+        name = self._fn(key)
+        self._write(name, value)
+
+    def _write(self, path, data: bytes):
+        """
+        Safely write the data to the given path.
+        """
+        # Make sure the directory exists
+        try:
+            os.makedirs(os.path.dirname(path), self.dirmode)
+        except (IOError, OSError):
+            pass
+
+        with self.lock_class(path) as lock:
+            # Write our actual file
+            with _secure_open_write(lock.path, self.filemode) as fh:
+                fh.write(data)
+
+    def _delete(self, key, suffix):
+        name = self._fn(key) + suffix
+        if not self.forever:
+            try:
+                os.remove(name)
+            except FileNotFoundError:
+                pass
+
+
+class FileCache(_FileCacheMixin, BaseCache):
+    """
+    Traditional FileCache: body is stored in memory, so not suitable for large
+    downloads.
+    """
+
+    def delete(self, key):
+        self._delete(key, "")
+
+
+class SeparateBodyFileCache(_FileCacheMixin, SeparateBodyBaseCache):
+    """
+    Memory-efficient FileCache: body is stored in a separate file, reducing
+    peak memory usage.
+    """
+
+    def get_body(self, key):
+        name = self._fn(key) + ".body"
+        try:
+            return open(name, "rb")
+        except FileNotFoundError:
+            return None
+
+    def set_body(self, key, body):
+        name = self._fn(key) + ".body"
+        self._write(name, body)
+
+    def delete(self, key):
+        self._delete(key, "")
+        self._delete(key, ".body")
+
+
+def url_to_file_path(url, filecache):
+    """Return the file cache path based on the URL.
+
+    This does not ensure the file exists!
+    """
+    key = CacheController.cache_url(url)
+    return filecache._fn(key)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
new file mode 100644
index 0000000..2cba4b0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/caches/redis_cache.py
@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from __future__ import division
+
+from datetime import datetime
+from pip._vendor.cachecontrol.cache import BaseCache
+
+
+class RedisCache(BaseCache):
+
+    def __init__(self, conn):
+        self.conn = conn
+
+    def get(self, key):
+        return self.conn.get(key)
+
+    def set(self, key, value, expires=None):
+        if not expires:
+            self.conn.set(key, value)
+        elif isinstance(expires, datetime):
+            expires = expires - datetime.utcnow()
+            self.conn.setex(key, int(expires.total_seconds()), value)
+        else:
+            self.conn.setex(key, expires, value)
+
+    def delete(self, key):
+        self.conn.delete(key)
+
+    def clear(self):
+        """Helper for clearing all the keys in a database. Use with
+        caution!"""
+        for key in self.conn.keys():
+            self.conn.delete(key)
+
+    def close(self):
+        """Redis uses connection pooling, no need to close the connection."""
+        pass
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/compat.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/compat.py
new file mode 100644
index 0000000..ccec937
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/compat.py
@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+try:
+    from urllib.parse import urljoin
+except ImportError:
+    from urlparse import urljoin
+
+
+try:
+    import cPickle as pickle
+except ImportError:
+    import pickle
+
+# Handle the case where the requests module has been patched to not have
+# urllib3 bundled as part of its source.
+try:
+    from pip._vendor.requests.packages.urllib3.response import HTTPResponse
+except ImportError:
+    from pip._vendor.urllib3.response import HTTPResponse
+
+try:
+    from pip._vendor.requests.packages.urllib3.util import is_fp_closed
+except ImportError:
+    from pip._vendor.urllib3.util import is_fp_closed
+
+# Replicate some six behaviour
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/controller.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/controller.py
new file mode 100644
index 0000000..7f23529
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/controller.py
@@ -0,0 +1,439 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+"""
+The httplib2 algorithms ported for use with requests.
+"""
+import logging
+import re
+import calendar
+import time
+from email.utils import parsedate_tz
+
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .cache import DictCache, SeparateBodyBaseCache
+from .serialize import Serializer
+
+
+logger = logging.getLogger(__name__)
+
+URI = re.compile(r"^(([^:/?#]+):)?(//([^/?#]*))?([^?#]*)(\?([^#]*))?(#(.*))?")
+
+PERMANENT_REDIRECT_STATUSES = (301, 308)
+
+
+def parse_uri(uri):
+    """Parses a URI using the regex given in Appendix B of RFC 3986.
+
+    (scheme, authority, path, query, fragment) = parse_uri(uri)
+    """
+    groups = URI.match(uri).groups()
+    return (groups[1], groups[3], groups[4], groups[6], groups[8])
+
+
+class CacheController(object):
+    """An interface to see if request should cached or not."""
+
+    def __init__(
+        self, cache=None, cache_etags=True, serializer=None, status_codes=None
+    ):
+        self.cache = DictCache() if cache is None else cache
+        self.cache_etags = cache_etags
+        self.serializer = serializer or Serializer()
+        self.cacheable_status_codes = status_codes or (200, 203, 300, 301, 308)
+
+    @classmethod
+    def _urlnorm(cls, uri):
+        """Normalize the URL to create a safe key for the cache"""
+        (scheme, authority, path, query, fragment) = parse_uri(uri)
+        if not scheme or not authority:
+            raise Exception("Only absolute URIs are allowed. uri = %s" % uri)
+
+        scheme = scheme.lower()
+        authority = authority.lower()
+
+        if not path:
+            path = "/"
+
+        # Could do syntax based normalization of the URI before
+        # computing the digest. See Section 6.2.2 of Std 66.
+        request_uri = query and "?".join([path, query]) or path
+        defrag_uri = scheme + "://" + authority + request_uri
+
+        return defrag_uri
+
+    @classmethod
+    def cache_url(cls, uri):
+        return cls._urlnorm(uri)
+
+    def parse_cache_control(self, headers):
+        known_directives = {
+            # https://tools.ietf.org/html/rfc7234#section-5.2
+            "max-age": (int, True),
+            "max-stale": (int, False),
+            "min-fresh": (int, True),
+            "no-cache": (None, False),
+            "no-store": (None, False),
+            "no-transform": (None, False),
+            "only-if-cached": (None, False),
+            "must-revalidate": (None, False),
+            "public": (None, False),
+            "private": (None, False),
+            "proxy-revalidate": (None, False),
+            "s-maxage": (int, True),
+        }
+
+        cc_headers = headers.get("cache-control", headers.get("Cache-Control", ""))
+
+        retval = {}
+
+        for cc_directive in cc_headers.split(","):
+            if not cc_directive.strip():
+                continue
+
+            parts = cc_directive.split("=", 1)
+            directive = parts[0].strip()
+
+            try:
+                typ, required = known_directives[directive]
+            except KeyError:
+                logger.debug("Ignoring unknown cache-control directive: %s", directive)
+                continue
+
+            if not typ or not required:
+                retval[directive] = None
+            if typ:
+                try:
+                    retval[directive] = typ(parts[1].strip())
+                except IndexError:
+                    if required:
+                        logger.debug(
+                            "Missing value for cache-control " "directive: %s",
+                            directive,
+                        )
+                except ValueError:
+                    logger.debug(
+                        "Invalid value for cache-control directive " "%s, must be %s",
+                        directive,
+                        typ.__name__,
+                    )
+
+        return retval
+
+    def cached_request(self, request):
+        """
+        Return a cached response if it exists in the cache, otherwise
+        return False.
+        """
+        cache_url = self.cache_url(request.url)
+        logger.debug('Looking up "%s" in the cache', cache_url)
+        cc = self.parse_cache_control(request.headers)
+
+        # Bail out if the request insists on fresh data
+        if "no-cache" in cc:
+            logger.debug('Request header has "no-cache", cache bypassed')
+            return False
+
+        if "max-age" in cc and cc["max-age"] == 0:
+            logger.debug('Request header has "max_age" as 0, cache bypassed')
+            return False
+
+        # Request allows serving from the cache, let's see if we find something
+        cache_data = self.cache.get(cache_url)
+        if cache_data is None:
+            logger.debug("No cache entry available")
+            return False
+
+        if isinstance(self.cache, SeparateBodyBaseCache):
+            body_file = self.cache.get_body(cache_url)
+        else:
+            body_file = None
+
+        # Check whether it can be deserialized
+        resp = self.serializer.loads(request, cache_data, body_file)
+        if not resp:
+            logger.warning("Cache entry deserialization failed, entry ignored")
+            return False
+
+        # If we have a cached permanent redirect, return it immediately. We
+        # don't need to test our response for other headers b/c it is
+        # intrinsically "cacheable" as it is Permanent.
+        #
+        # See:
+        #   https://tools.ietf.org/html/rfc7231#section-6.4.2
+        #
+        # Client can try to refresh the value by repeating the request
+        # with cache busting headers as usual (ie no-cache).
+        if int(resp.status) in PERMANENT_REDIRECT_STATUSES:
+            msg = (
+                "Returning cached permanent redirect response "
+                "(ignoring date and etag information)"
+            )
+            logger.debug(msg)
+            return resp
+
+        headers = CaseInsensitiveDict(resp.headers)
+        if not headers or "date" not in headers:
+            if "etag" not in headers:
+                # Without date or etag, the cached response can never be used
+                # and should be deleted.
+                logger.debug("Purging cached response: no date or etag")
+                self.cache.delete(cache_url)
+            logger.debug("Ignoring cached response: no date")
+            return False
+
+        now = time.time()
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        current_age = max(0, now - date)
+        logger.debug("Current age based on date: %i", current_age)
+
+        # TODO: There is an assumption that the result will be a
+        #       urllib3 response object. This may not be best since we
+        #       could probably avoid instantiating or constructing the
+        #       response until we know we need it.
+        resp_cc = self.parse_cache_control(headers)
+
+        # determine freshness
+        freshness_lifetime = 0
+
+        # Check the max-age pragma in the cache control header
+        if "max-age" in resp_cc:
+            freshness_lifetime = resp_cc["max-age"]
+            logger.debug("Freshness lifetime from max-age: %i", freshness_lifetime)
+
+        # If there isn't a max-age, check for an expires header
+        elif "expires" in headers:
+            expires = parsedate_tz(headers["expires"])
+            if expires is not None:
+                expire_time = calendar.timegm(expires) - date
+                freshness_lifetime = max(0, expire_time)
+                logger.debug("Freshness lifetime from expires: %i", freshness_lifetime)
+
+        # Determine if we are setting freshness limit in the
+        # request. Note, this overrides what was in the response.
+        if "max-age" in cc:
+            freshness_lifetime = cc["max-age"]
+            logger.debug(
+                "Freshness lifetime from request max-age: %i", freshness_lifetime
+            )
+
+        if "min-fresh" in cc:
+            min_fresh = cc["min-fresh"]
+            # adjust our current age by our min fresh
+            current_age += min_fresh
+            logger.debug("Adjusted current age from min-fresh: %i", current_age)
+
+        # Return entry if it is fresh enough
+        if freshness_lifetime > current_age:
+            logger.debug('The response is "fresh", returning cached response')
+            logger.debug("%i > %i", freshness_lifetime, current_age)
+            return resp
+
+        # we're not fresh. If we don't have an Etag, clear it out
+        if "etag" not in headers:
+            logger.debug('The cached response is "stale" with no etag, purging')
+            self.cache.delete(cache_url)
+
+        # return the original handler
+        return False
+
+    def conditional_headers(self, request):
+        cache_url = self.cache_url(request.url)
+        resp = self.serializer.loads(request, self.cache.get(cache_url))
+        new_headers = {}
+
+        if resp:
+            headers = CaseInsensitiveDict(resp.headers)
+
+            if "etag" in headers:
+                new_headers["If-None-Match"] = headers["ETag"]
+
+            if "last-modified" in headers:
+                new_headers["If-Modified-Since"] = headers["Last-Modified"]
+
+        return new_headers
+
+    def _cache_set(self, cache_url, request, response, body=None, expires_time=None):
+        """
+        Store the data in the cache.
+        """
+        if isinstance(self.cache, SeparateBodyBaseCache):
+            # We pass in the body separately; just put a placeholder empty
+            # string in the metadata.
+            self.cache.set(
+                cache_url,
+                self.serializer.dumps(request, response, b""),
+                expires=expires_time,
+            )
+            self.cache.set_body(cache_url, body)
+        else:
+            self.cache.set(
+                cache_url,
+                self.serializer.dumps(request, response, body),
+                expires=expires_time,
+            )
+
+    def cache_response(self, request, response, body=None, status_codes=None):
+        """
+        Algorithm for caching requests.
+
+        This assumes a requests Response object.
+        """
+        # From httplib2: Don't cache 206's since we aren't going to
+        #                handle byte range requests
+        cacheable_status_codes = status_codes or self.cacheable_status_codes
+        if response.status not in cacheable_status_codes:
+            logger.debug(
+                "Status code %s not in %s", response.status, cacheable_status_codes
+            )
+            return
+
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        if "date" in response_headers:
+            date = calendar.timegm(parsedate_tz(response_headers["date"]))
+        else:
+            date = 0
+
+        # If we've been given a body, our response has a Content-Length, that
+        # Content-Length is valid then we can check to see if the body we've
+        # been given matches the expected size, and if it doesn't we'll just
+        # skip trying to cache it.
+        if (
+            body is not None
+            and "content-length" in response_headers
+            and response_headers["content-length"].isdigit()
+            and int(response_headers["content-length"]) != len(body)
+        ):
+            return
+
+        cc_req = self.parse_cache_control(request.headers)
+        cc = self.parse_cache_control(response_headers)
+
+        cache_url = self.cache_url(request.url)
+        logger.debug('Updating cache with response from "%s"', cache_url)
+
+        # Delete it from the cache if we happen to have it stored there
+        no_store = False
+        if "no-store" in cc:
+            no_store = True
+            logger.debug('Response header has "no-store"')
+        if "no-store" in cc_req:
+            no_store = True
+            logger.debug('Request header has "no-store"')
+        if no_store and self.cache.get(cache_url):
+            logger.debug('Purging existing cache entry to honor "no-store"')
+            self.cache.delete(cache_url)
+        if no_store:
+            return
+
+        # https://tools.ietf.org/html/rfc7234#section-4.1:
+        # A Vary header field-value of "*" always fails to match.
+        # Storing such a response leads to a deserialization warning
+        # during cache lookup and is not allowed to ever be served,
+        # so storing it can be avoided.
+        if "*" in response_headers.get("vary", ""):
+            logger.debug('Response header has "Vary: *"')
+            return
+
+        # If we've been given an etag, then keep the response
+        if self.cache_etags and "etag" in response_headers:
+            expires_time = 0
+            if response_headers.get("expires"):
+                expires = parsedate_tz(response_headers["expires"])
+                if expires is not None:
+                    expires_time = calendar.timegm(expires) - date
+
+            expires_time = max(expires_time, 14 * 86400)
+
+            logger.debug("etag object cached for {0} seconds".format(expires_time))
+            logger.debug("Caching due to etag")
+            self._cache_set(cache_url, request, response, body, expires_time)
+
+        # Add to the cache any permanent redirects. We do this before looking
+        # that the Date headers.
+        elif int(response.status) in PERMANENT_REDIRECT_STATUSES:
+            logger.debug("Caching permanent redirect")
+            self._cache_set(cache_url, request, response, b"")
+
+        # Add to the cache if the response headers demand it. If there
+        # is no date header then we can't do anything about expiring
+        # the cache.
+        elif "date" in response_headers:
+            date = calendar.timegm(parsedate_tz(response_headers["date"]))
+            # cache when there is a max-age > 0
+            if "max-age" in cc and cc["max-age"] > 0:
+                logger.debug("Caching b/c date exists and max-age > 0")
+                expires_time = cc["max-age"]
+                self._cache_set(
+                    cache_url,
+                    request,
+                    response,
+                    body,
+                    expires_time,
+                )
+
+            # If the request can expire, it means we should cache it
+            # in the meantime.
+            elif "expires" in response_headers:
+                if response_headers["expires"]:
+                    expires = parsedate_tz(response_headers["expires"])
+                    if expires is not None:
+                        expires_time = calendar.timegm(expires) - date
+                    else:
+                        expires_time = None
+
+                    logger.debug(
+                        "Caching b/c of expires header. expires in {0} seconds".format(
+                            expires_time
+                        )
+                    )
+                    self._cache_set(
+                        cache_url,
+                        request,
+                        response,
+                        body,
+                        expires_time,
+                    )
+
+    def update_cached_response(self, request, response):
+        """On a 304 we will get a new set of headers that we want to
+        update our cached value with, assuming we have one.
+
+        This should only ever be called when we've sent an ETag and
+        gotten a 304 as the response.
+        """
+        cache_url = self.cache_url(request.url)
+
+        cached_response = self.serializer.loads(request, self.cache.get(cache_url))
+
+        if not cached_response:
+            # we didn't have a cached response
+            return response
+
+        # Lets update our headers with the headers from the new request:
+        # http://tools.ietf.org/html/draft-ietf-httpbis-p4-conditional-26#section-4.1
+        #
+        # The server isn't supposed to send headers that would make
+        # the cached body invalid. But... just in case, we'll be sure
+        # to strip out ones we know that might be problmatic due to
+        # typical assumptions.
+        excluded_headers = ["content-length"]
+
+        cached_response.headers.update(
+            dict(
+                (k, v)
+                for k, v in response.headers.items()
+                if k.lower() not in excluded_headers
+            )
+        )
+
+        # we want a 200 b/c we have content via the cache
+        cached_response.status = 200
+
+        # update our cache
+        self._cache_set(cache_url, request, cached_response)
+
+        return cached_response
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/filewrapper.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/filewrapper.py
new file mode 100644
index 0000000..f5ed5f6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/filewrapper.py
@@ -0,0 +1,111 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from tempfile import NamedTemporaryFile
+import mmap
+
+
+class CallbackFileWrapper(object):
+    """
+    Small wrapper around a fp object which will tee everything read into a
+    buffer, and when that file is closed it will execute a callback with the
+    contents of that buffer.
+
+    All attributes are proxied to the underlying file object.
+
+    This class uses members with a double underscore (__) leading prefix so as
+    not to accidentally shadow an attribute.
+
+    The data is stored in a temporary file until it is all available.  As long
+    as the temporary files directory is disk-based (sometimes it's a
+    memory-backed-``tmpfs`` on Linux), data will be unloaded to disk if memory
+    pressure is high.  For small files the disk usually won't be used at all,
+    it'll all be in the filesystem memory cache, so there should be no
+    performance impact.
+    """
+
+    def __init__(self, fp, callback):
+        self.__buf = NamedTemporaryFile("rb+", delete=True)
+        self.__fp = fp
+        self.__callback = callback
+
+    def __getattr__(self, name):
+        # The vaguaries of garbage collection means that self.__fp is
+        # not always set.  By using __getattribute__ and the private
+        # name[0] allows looking up the attribute value and raising an
+        # AttributeError when it doesn't exist. This stop thigns from
+        # infinitely recursing calls to getattr in the case where
+        # self.__fp hasn't been set.
+        #
+        # [0] https://docs.python.org/2/reference/expressions.html#atom-identifiers
+        fp = self.__getattribute__("_CallbackFileWrapper__fp")
+        return getattr(fp, name)
+
+    def __is_fp_closed(self):
+        try:
+            return self.__fp.fp is None
+
+        except AttributeError:
+            pass
+
+        try:
+            return self.__fp.closed
+
+        except AttributeError:
+            pass
+
+        # We just don't cache it then.
+        # TODO: Add some logging here...
+        return False
+
+    def _close(self):
+        if self.__callback:
+            if self.__buf.tell() == 0:
+                # Empty file:
+                result = b""
+            else:
+                # Return the data without actually loading it into memory,
+                # relying on Python's buffer API and mmap(). mmap() just gives
+                # a view directly into the filesystem's memory cache, so it
+                # doesn't result in duplicate memory use.
+                self.__buf.seek(0, 0)
+                result = memoryview(
+                    mmap.mmap(self.__buf.fileno(), 0, access=mmap.ACCESS_READ)
+                )
+            self.__callback(result)
+
+        # We assign this to None here, because otherwise we can get into
+        # really tricky problems where the CPython interpreter dead locks
+        # because the callback is holding a reference to something which
+        # has a __del__ method. Setting this to None breaks the cycle
+        # and allows the garbage collector to do it's thing normally.
+        self.__callback = None
+
+        # Closing the temporary file releases memory and frees disk space.
+        # Important when caching big files.
+        self.__buf.close()
+
+    def read(self, amt=None):
+        data = self.__fp.read(amt)
+        if data:
+            # We may be dealing with b'', a sign that things are over:
+            # it's passed e.g. after we've already closed self.__buf.
+            self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
+
+    def _safe_read(self, amt):
+        data = self.__fp._safe_read(amt)
+        if amt == 2 and data == b"\r\n":
+            # urllib executes this read to toss the CRLF at the end
+            # of the chunk.
+            return data
+
+        self.__buf.write(data)
+        if self.__is_fp_closed():
+            self._close()
+
+        return data
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/heuristics.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/heuristics.py
new file mode 100644
index 0000000..ebe4a96
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/heuristics.py
@@ -0,0 +1,139 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import calendar
+import time
+
+from email.utils import formatdate, parsedate, parsedate_tz
+
+from datetime import datetime, timedelta
+
+TIME_FMT = "%a, %d %b %Y %H:%M:%S GMT"
+
+
+def expire_after(delta, date=None):
+    date = date or datetime.utcnow()
+    return date + delta
+
+
+def datetime_to_header(dt):
+    return formatdate(calendar.timegm(dt.timetuple()))
+
+
+class BaseHeuristic(object):
+
+    def warning(self, response):
+        """
+        Return a valid 1xx warning header value describing the cache
+        adjustments.
+
+        The response is provided too allow warnings like 113
+        http://tools.ietf.org/html/rfc7234#section-5.5.4 where we need
+        to explicitly say response is over 24 hours old.
+        """
+        return '110 - "Response is Stale"'
+
+    def update_headers(self, response):
+        """Update the response headers with any new headers.
+
+        NOTE: This SHOULD always include some Warning header to
+              signify that the response was cached by the client, not
+              by way of the provided headers.
+        """
+        return {}
+
+    def apply(self, response):
+        updated_headers = self.update_headers(response)
+
+        if updated_headers:
+            response.headers.update(updated_headers)
+            warning_header_value = self.warning(response)
+            if warning_header_value is not None:
+                response.headers.update({"Warning": warning_header_value})
+
+        return response
+
+
+class OneDayCache(BaseHeuristic):
+    """
+    Cache the response by providing an expires 1 day in the
+    future.
+    """
+
+    def update_headers(self, response):
+        headers = {}
+
+        if "expires" not in response.headers:
+            date = parsedate(response.headers["date"])
+            expires = expire_after(timedelta(days=1), date=datetime(*date[:6]))
+            headers["expires"] = datetime_to_header(expires)
+            headers["cache-control"] = "public"
+        return headers
+
+
+class ExpiresAfter(BaseHeuristic):
+    """
+    Cache **all** requests for a defined time period.
+    """
+
+    def __init__(self, **kw):
+        self.delta = timedelta(**kw)
+
+    def update_headers(self, response):
+        expires = expire_after(self.delta)
+        return {"expires": datetime_to_header(expires), "cache-control": "public"}
+
+    def warning(self, response):
+        tmpl = "110 - Automatically cached for %s. Response might be stale"
+        return tmpl % self.delta
+
+
+class LastModified(BaseHeuristic):
+    """
+    If there is no Expires header already, fall back on Last-Modified
+    using the heuristic from
+    http://tools.ietf.org/html/rfc7234#section-4.2.2
+    to calculate a reasonable value.
+
+    Firefox also does something like this per
+    https://developer.mozilla.org/en-US/docs/Web/HTTP/Caching_FAQ
+    http://lxr.mozilla.org/mozilla-release/source/netwerk/protocol/http/nsHttpResponseHead.cpp#397
+    Unlike mozilla we limit this to 24-hr.
+    """
+    cacheable_by_default_statuses = {
+        200, 203, 204, 206, 300, 301, 404, 405, 410, 414, 501
+    }
+
+    def update_headers(self, resp):
+        headers = resp.headers
+
+        if "expires" in headers:
+            return {}
+
+        if "cache-control" in headers and headers["cache-control"] != "public":
+            return {}
+
+        if resp.status not in self.cacheable_by_default_statuses:
+            return {}
+
+        if "date" not in headers or "last-modified" not in headers:
+            return {}
+
+        date = calendar.timegm(parsedate_tz(headers["date"]))
+        last_modified = parsedate(headers["last-modified"])
+        if date is None or last_modified is None:
+            return {}
+
+        now = time.time()
+        current_age = max(0, now - date)
+        delta = date - calendar.timegm(last_modified)
+        freshness_lifetime = max(0, min(delta / 10, 24 * 3600))
+        if freshness_lifetime <= current_age:
+            return {}
+
+        expires = date + freshness_lifetime
+        return {"expires": time.strftime(TIME_FMT, time.gmtime(expires))}
+
+    def warning(self, resp):
+        return None
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/serialize.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/serialize.py
new file mode 100644
index 0000000..7fe1a3e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/serialize.py
@@ -0,0 +1,190 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import base64
+import io
+import json
+import zlib
+
+from pip._vendor import msgpack
+from pip._vendor.requests.structures import CaseInsensitiveDict
+
+from .compat import HTTPResponse, pickle, text_type
+
+
+def _b64_decode_bytes(b):
+    return base64.b64decode(b.encode("ascii"))
+
+
+def _b64_decode_str(s):
+    return _b64_decode_bytes(s).decode("utf8")
+
+
+_default_body_read = object()
+
+
+class Serializer(object):
+    def dumps(self, request, response, body=None):
+        response_headers = CaseInsensitiveDict(response.headers)
+
+        if body is None:
+            # When a body isn't passed in, we'll read the response. We
+            # also update the response with a new file handler to be
+            # sure it acts as though it was never read.
+            body = response.read(decode_content=False)
+            response._fp = io.BytesIO(body)
+
+        # NOTE: This is all a bit weird, but it's really important that on
+        #       Python 2.x these objects are unicode and not str, even when
+        #       they contain only ascii. The problem here is that msgpack
+        #       understands the difference between unicode and bytes and we
+        #       have it set to differentiate between them, however Python 2
+        #       doesn't know the difference. Forcing these to unicode will be
+        #       enough to have msgpack know the difference.
+        data = {
+            u"response": {
+                u"body": body,  # Empty bytestring if body is stored separately
+                u"headers": dict(
+                    (text_type(k), text_type(v)) for k, v in response.headers.items()
+                ),
+                u"status": response.status,
+                u"version": response.version,
+                u"reason": text_type(response.reason),
+                u"strict": response.strict,
+                u"decode_content": response.decode_content,
+            }
+        }
+
+        # Construct our vary headers
+        data[u"vary"] = {}
+        if u"vary" in response_headers:
+            varied_headers = response_headers[u"vary"].split(",")
+            for header in varied_headers:
+                header = text_type(header).strip()
+                header_value = request.headers.get(header, None)
+                if header_value is not None:
+                    header_value = text_type(header_value)
+                data[u"vary"][header] = header_value
+
+        return b",".join([b"cc=4", msgpack.dumps(data, use_bin_type=True)])
+
+    def loads(self, request, data, body_file=None):
+        # Short circuit if we've been given an empty set of data
+        if not data:
+            return
+
+        # Determine what version of the serializer the data was serialized
+        # with
+        try:
+            ver, data = data.split(b",", 1)
+        except ValueError:
+            ver = b"cc=0"
+
+        # Make sure that our "ver" is actually a version and isn't a false
+        # positive from a , being in the data stream.
+        if ver[:3] != b"cc=":
+            data = ver + data
+            ver = b"cc=0"
+
+        # Get the version number out of the cc=N
+        ver = ver.split(b"=", 1)[-1].decode("ascii")
+
+        # Dispatch to the actual load method for the given version
+        try:
+            return getattr(self, "_loads_v{}".format(ver))(request, data, body_file)
+
+        except AttributeError:
+            # This is a version we don't have a loads function for, so we'll
+            # just treat it as a miss and return None
+            return
+
+    def prepare_response(self, request, cached, body_file=None):
+        """Verify our vary headers match and construct a real urllib3
+        HTTPResponse object.
+        """
+        # Special case the '*' Vary value as it means we cannot actually
+        # determine if the cached response is suitable for this request.
+        # This case is also handled in the controller code when creating
+        # a cache entry, but is left here for backwards compatibility.
+        if "*" in cached.get("vary", {}):
+            return
+
+        # Ensure that the Vary headers for the cached response match our
+        # request
+        for header, value in cached.get("vary", {}).items():
+            if request.headers.get(header, None) != value:
+                return
+
+        body_raw = cached["response"].pop("body")
+
+        headers = CaseInsensitiveDict(data=cached["response"]["headers"])
+        if headers.get("transfer-encoding", "") == "chunked":
+            headers.pop("transfer-encoding")
+
+        cached["response"]["headers"] = headers
+
+        try:
+            if body_file is None:
+                body = io.BytesIO(body_raw)
+            else:
+                body = body_file
+        except TypeError:
+            # This can happen if cachecontrol serialized to v1 format (pickle)
+            # using Python 2. A Python 2 str(byte string) will be unpickled as
+            # a Python 3 str (unicode string), which will cause the above to
+            # fail with:
+            #
+            #     TypeError: 'str' does not support the buffer interface
+            body = io.BytesIO(body_raw.encode("utf8"))
+
+        return HTTPResponse(body=body, preload_content=False, **cached["response"])
+
+    def _loads_v0(self, request, data, body_file=None):
+        # The original legacy cache data. This doesn't contain enough
+        # information to construct everything we need, so we'll treat this as
+        # a miss.
+        return
+
+    def _loads_v1(self, request, data, body_file=None):
+        try:
+            cached = pickle.loads(data)
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached, body_file)
+
+    def _loads_v2(self, request, data, body_file=None):
+        assert body_file is None
+        try:
+            cached = json.loads(zlib.decompress(data).decode("utf8"))
+        except (ValueError, zlib.error):
+            return
+
+        # We need to decode the items that we've base64 encoded
+        cached["response"]["body"] = _b64_decode_bytes(cached["response"]["body"])
+        cached["response"]["headers"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v))
+            for k, v in cached["response"]["headers"].items()
+        )
+        cached["response"]["reason"] = _b64_decode_str(cached["response"]["reason"])
+        cached["vary"] = dict(
+            (_b64_decode_str(k), _b64_decode_str(v) if v is not None else v)
+            for k, v in cached["vary"].items()
+        )
+
+        return self.prepare_response(request, cached, body_file)
+
+    def _loads_v3(self, request, data, body_file):
+        # Due to Python 2 encoding issues, it's impossible to know for sure
+        # exactly how to load v3 entries, thus we'll treat these as a miss so
+        # that they get rewritten out as v4 entries.
+        return
+
+    def _loads_v4(self, request, data, body_file=None):
+        try:
+            cached = msgpack.loads(data, raw=False)
+        except ValueError:
+            return
+
+        return self.prepare_response(request, cached, body_file)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/wrapper.py b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/wrapper.py
new file mode 100644
index 0000000..b6ee7f2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/cachecontrol/wrapper.py
@@ -0,0 +1,33 @@
+# SPDX-FileCopyrightText: 2015 Eric Larson
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from .adapter import CacheControlAdapter
+from .cache import DictCache
+
+
+def CacheControl(
+    sess,
+    cache=None,
+    cache_etags=True,
+    serializer=None,
+    heuristic=None,
+    controller_class=None,
+    adapter_class=None,
+    cacheable_methods=None,
+):
+
+    cache = DictCache() if cache is None else cache
+    adapter_class = adapter_class or CacheControlAdapter
+    adapter = adapter_class(
+        cache,
+        cache_etags=cache_etags,
+        serializer=serializer,
+        heuristic=heuristic,
+        controller_class=controller_class,
+        cacheable_methods=cacheable_methods,
+    )
+    sess.mount("http://", adapter)
+    sess.mount("https://", adapter)
+
+    return sess
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__init__.py
new file mode 100644
index 0000000..af4bcc1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__init__.py
@@ -0,0 +1,4 @@
+from .core import contents, where
+
+__all__ = ["contents", "where"]
+__version__ = "2022.09.24"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__main__.py b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__main__.py
new file mode 100644
index 0000000..0037634
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__main__.py
@@ -0,0 +1,12 @@
+import argparse
+
+from pip._vendor.certifi import contents, where
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-c", "--contents", action="store_true")
+args = parser.parse_args()
+
+if args.contents:
+    print(contents())
+else:
+    print(where())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..abcf80f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-39.pyc
new file mode 100644
index 0000000..9b08a16
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/__main__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-39.pyc
new file mode 100644
index 0000000..4f5198b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/__pycache__/core.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/cacert.pem b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/cacert.pem
new file mode 100644
index 0000000..4005155
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/cacert.pem
@@ -0,0 +1,4708 @@
+
+# Issuer: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Subject: CN=GlobalSign Root CA O=GlobalSign nv-sa OU=Root CA
+# Label: "GlobalSign Root CA"
+# Serial: 4835703278459707669005204
+# MD5 Fingerprint: 3e:45:52:15:09:51:92:e1:b7:5d:37:9f:b1:87:29:8a
+# SHA1 Fingerprint: b1:bc:96:8b:d4:f4:9d:62:2a:a8:9a:81:f2:15:01:52:a4:1d:82:9c
+# SHA256 Fingerprint: eb:d4:10:40:e4:bb:3e:c7:42:c9:e3:81:d3:1e:f2:a4:1a:48:b6:68:5c:96:e7:ce:f3:c1:df:6c:d4:33:1c:99
+-----BEGIN CERTIFICATE-----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+# Issuer: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Subject: CN=Entrust.net Certification Authority (2048) O=Entrust.net OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.)/(c) 1999 Entrust.net Limited
+# Label: "Entrust.net Premium 2048 Secure Server CA"
+# Serial: 946069240
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Subject: CN=Baltimore CyberTrust Root O=Baltimore OU=CyberTrust
+# Label: "Baltimore CyberTrust Root"
+# Serial: 33554617
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Subject: CN=Entrust Root Certification Authority O=Entrust, Inc. OU=www.entrust.net/CPS is incorporated by reference/(c) 2006 Entrust, Inc.
+# Label: "Entrust Root Certification Authority"
+# Serial: 1164660820
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=AAA Certificate Services O=Comodo CA Limited
+# Subject: CN=AAA Certificate Services O=Comodo CA Limited
+# Label: "Comodo AAA Services root"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2"
+# Serial: 1289
+# MD5 Fingerprint: 5e:39:7b:dd:f8:ba:ec:82:e9:ac:62:ba:0c:54:00:2b
+# SHA1 Fingerprint: ca:3a:fb:cf:12:40:36:4b:44:b2:16:20:88:80:48:39:19:93:7c:f7
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3"
+# Serial: 1478
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+# SHA1 Fingerprint: 1f:49:14:f7:d8:74:95:1d:dd:ae:02:c0:be:fd:3a:2d:82:75:51:85
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+-----BEGIN CERTIFICATE-----
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+# Subject: O=SECOM Trust.net OU=Security Communication RootCA1
+# Label: "Security Communication Root CA"
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=XRamp Global Certification Authority O=XRamp Security Services Inc OU=www.xrampsecurity.com
+# Label: "XRamp Global CA Root"
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+-----BEGIN CERTIFICATE-----
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+# Label: "Go Daddy Class 2 CA"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Label: "Starfield Class 2 CA"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=DigiCert Assured ID Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root CA"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root CA"
+# Serial: 10944719598952040374951832963794454346
+# MD5 Fingerprint: 79:e4:a9:84:0d:7d:3a:96:d7:c0:4f:e2:43:4c:89:2e
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert High Assurance EV Root CA O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert High Assurance EV Root CA"
+# Serial: 3553400076410547919724730734378100087
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Gold CA - G2 O=SwissSign AG
+# Label: "SwissSign Gold CA - G2"
+# Serial: 13492815561806991280
+# MD5 Fingerprint: 24:77:d9:a8:91:d1:3b:fa:88:2d:c2:ff:f8:cd:33:93
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Subject: CN=SwissSign Silver CA - G2 O=SwissSign AG
+# Label: "SwissSign Silver CA - G2"
+# Serial: 5700383053117599563
+# MD5 Fingerprint: e0:06:a1:c9:7d:cf:c9:fc:0d:c0:56:75:96:d8:62:13
+# SHA1 Fingerprint: 9b:aa:e5:9f:56:ee:21:cb:43:5a:be:25:93:df:a7:f0:40:d1:1d:cb
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SecureTrust CA O=SecureTrust Corporation
+# Subject: CN=SecureTrust CA O=SecureTrust Corporation
+# Label: "SecureTrust CA"
+# Serial: 17199774589125277788362757014266862032
+# MD5 Fingerprint: dc:32:c3:a7:6d:25:57:c7:68:09:9d:ea:2d:a9:a2:d1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Secure Global CA O=SecureTrust Corporation
+# Subject: CN=Secure Global CA O=SecureTrust Corporation
+# Label: "Secure Global CA"
+# Serial: 9751836167731051554232119481456978597
+# MD5 Fingerprint: cf:f4:27:0d:d4:ed:dc:65:16:49:6d:3d:da:bf:6e:de
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=COMODO Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO Certification Authority O=COMODO CA Limited
+# Label: "COMODO Certification Authority"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Subject: CN=Network Solutions Certificate Authority O=Network Solutions L.L.C.
+# Label: "Network Solutions Certificate Authority"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO ECC Certification Authority O=COMODO CA Limited
+# Label: "COMODO ECC Certification Authority"
+# Serial: 41578283867086692638256921589707938090
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certigna O=Dhimyotis
+# Subject: CN=Certigna O=Dhimyotis
+# Label: "Certigna"
+# Serial: 18364802974209362175
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+-----BEGIN CERTIFICATE-----
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+# Issuer: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Subject: O=Chunghwa Telecom Co., Ltd. OU=ePKI Root Certification Authority
+# Label: "ePKI Root Certification Authority"
+# Serial: 28956088682735189655030529057352760477
+# MD5 Fingerprint: 1b:2e:00:ca:26:06:90:3d:ad:fe:6f:15:68:d3:6b:b3
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=certSIGN OU=certSIGN ROOT CA
+# Subject: O=certSIGN OU=certSIGN ROOT CA
+# Label: "certSIGN ROOT CA"
+# Serial: 35210227249154
+# MD5 Fingerprint: 18:98:c0:d6:e9:3a:fc:f9:b0:f5:0c:f7:4b:01:44:17
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Subject: CN=NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny O=NetLock Kft. OU=Tan\xfas\xedtv\xe1nykiad\xf3k (Certification Services)
+# Label: "NetLock Arany (Class Gold) F\u0151tan\xfas\xedtv\xe1ny"
+# Serial: 80544274841616
+# MD5 Fingerprint: c5:a1:b7:ff:73:dd:d6:d7:34:32:18:df:fc:3c:ad:88
+# SHA1 Fingerprint: 06:08:3f:59:3f:15:a1:04:a0:69:a4:6b:a9:03:d0:06:b7:97:09:91
+# SHA256 Fingerprint: 6c:61:da:c3:a2:de:f0:31:50:6b:e0:36:d2:a6:fe:40:19:94:fb:d1:3d:f9:c8:d4:66:59:92:74:c4:46:ec:98
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 1 O=Hongkong Post
+# Label: "Hongkong Post Root CA 1"
+# Serial: 1000
+# MD5 Fingerprint: a8:0d:6f:39:78:b9:43:6d:77:42:6d:98:5a:cc:23:ca
+# SHA1 Fingerprint: d6:da:a8:20:8d:09:d2:15:4d:24:b5:2f:cb:34:6e:b2:58:b2:8a:58
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Subject: CN=SecureSign RootCA11 O=Japan Certification Services, Inc.
+# Label: "SecureSign RootCA11"
+# Serial: 1
+# MD5 Fingerprint: b7:52:74:e2:92:b4:80:93:f2:75:e4:cc:d7:f2:ea:26
+# SHA1 Fingerprint: 3b:c4:9f:48:f8:f3:73:a0:9c:1e:bd:f8:5b:b1:c3:65:c7:d8:11:b3
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Subject: CN=Microsec e-Szigno Root CA 2009 O=Microsec Ltd.
+# Label: "Microsec e-Szigno Root CA 2009"
+# Serial: 14014712776195784473
+# MD5 Fingerprint: f8:49:f4:03:bc:44:2d:83:be:48:69:7d:29:64:fc:b1
+# SHA1 Fingerprint: 89:df:74:fe:5c:f4:0f:4a:80:f9:e3:37:7d:54:da:91:e1:01:31:8e
+# SHA256 Fingerprint: 3c:5f:81:fe:a5:fa:b8:2c:64:bf:a2:ea:ec:af:cd:e8:e0:77:fc:86:20:a7:ca:e5:37:16:3d:f3:6e:db:f3:78
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R3
+# Label: "GlobalSign Root CA - R3"
+# Serial: 4835703278459759426209954
+# MD5 Fingerprint: c5:df:b8:49:ca:05:13:55:ee:2d:ba:1a:c3:3e:b0:28
+# SHA1 Fingerprint: d6:9b:56:11:48:f0:1c:77:c5:45:78:c1:09:26:df:5b:85:69:76:ad
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Subject: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Label: "Autoridad de Certificacion Firmaprofesional CIF A62634068"
+# Serial: 6047274297262753887
+# MD5 Fingerprint: 73:3a:74:7a:ec:bb:a3:96:a6:c2:e4:e2:c8:9b:c0:c3
+# SHA1 Fingerprint: ae:c5:fb:3f:c8:e1:bf:c4:e5:4f:03:07:5a:9a:e8:00:b7:f7:b6:fa
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+-----BEGIN CERTIFICATE-----
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+# Label: "Go Daddy Root Certificate Authority - G2"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Starfield Root Certificate Authority - G2 O=Starfield Technologies, Inc.
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+# Label: "Starfield Root Certificate Authority - G2"
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+-----BEGIN CERTIFICATE-----
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+# Label: "Starfield Services Root Certificate Authority - G2"
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+-----BEGIN CERTIFICATE-----
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+# Label: "AffirmTrust Commercial"
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+-----BEGIN CERTIFICATE-----
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+# Label: "AffirmTrust Networking"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=AffirmTrust Premium O=AffirmTrust
+# Subject: CN=AffirmTrust Premium O=AffirmTrust
+# Label: "AffirmTrust Premium"
+# Serial: 7893706540734352110
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Subject: CN=AffirmTrust Premium ECC O=AffirmTrust
+# Label: "AffirmTrust Premium ECC"
+# Serial: 8401224907861490260
+# MD5 Fingerprint: 64:b0:09:55:cf:b1:d5:99:e2:be:13:ab:a6:5d:ea:4d
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Subject: CN=Certum Trusted Network CA O=Unizeto Technologies S.A. OU=Certum Certification Authority
+# Label: "Certum Trusted Network CA"
+# Serial: 279744
+# MD5 Fingerprint: d5:e9:81:40:c5:18:69:fc:46:2c:89:75:62:0f:aa:78
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Root Certification Authority O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Root Certification Authority"
+# Serial: 1
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+# SHA1 Fingerprint: cf:9e:87:6d:d3:eb:fc:42:26:97:a3:b5:a3:7a:a0:76:a9:06:23:48
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Subject: O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
+# Label: "Security Communication RootCA2"
+# Serial: 0
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Actalis Authentication Root CA O=Actalis S.p.A./03358520967
+# Subject: CN=Actalis Authentication Root CA O=Actalis S.p.A./03358520967
+# Label: "Actalis Authentication Root CA"
+# Serial: 6271844772424770508
+# MD5 Fingerprint: 69:c1:0d:4f:07:a3:1b:c3:fe:56:3d:04:bc:11:f6:a6
+# SHA1 Fingerprint: f3:73:b3:87:06:5a:28:84:8a:f2:f3:4a:ce:19:2b:dd:c7:8e:9c:ac
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 2 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 2 Root CA"
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+# Issuer: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Subject: CN=Buypass Class 3 Root CA O=Buypass AS-983163327
+# Label: "Buypass Class 3 Root CA"
+# Serial: 2
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=T-TeleSec GlobalRoot Class 3 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
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+# Label: "T-TeleSec GlobalRoot Class 3"
+# Serial: 1
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 2009"
+# Serial: 623603
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Subject: CN=D-TRUST Root Class 3 CA 2 EV 2009 O=D-Trust GmbH
+# Label: "D-TRUST Root Class 3 CA 2 EV 2009"
+# Serial: 623604
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=CA Disig Root R2 O=Disig a.s.
+# Subject: CN=CA Disig Root R2 O=Disig a.s.
+# Label: "CA Disig Root R2"
+# Serial: 10572350602393338211
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+-----BEGIN CERTIFICATE-----
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+# Subject: CN=ACCVRAIZ1 O=ACCV OU=PKIACCV
+# Label: "ACCVRAIZ1"
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Subject: CN=TWCA Global Root CA O=TAIWAN-CA OU=Root CA
+# Label: "TWCA Global Root CA"
+# Serial: 3262
+# MD5 Fingerprint: f9:03:7e:cf:e6:9e:3c:73:7a:2a:90:07:69:ff:2b:96
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Subject: CN=TeliaSonera Root CA v1 O=TeliaSonera
+# Label: "TeliaSonera Root CA v1"
+# Serial: 199041966741090107964904287217786801558
+# MD5 Fingerprint: 37:41:49:1b:18:56:9a:26:f5:ad:c2:66:fb:40:a5:4c
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Subject: CN=E-Tugra Certification Authority O=E-Tu\u011fra EBG Bili\u015fim Teknolojileri ve Hizmetleri A.\u015e. OU=E-Tugra Sertifikasyon Merkezi
+# Label: "E-Tugra Certification Authority"
+# Serial: 7667447206703254355
+# MD5 Fingerprint: b8:a1:03:63:b0:bd:21:71:70:8a:6f:13:3a:bb:79:49
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Subject: CN=T-TeleSec GlobalRoot Class 2 O=T-Systems Enterprise Services GmbH OU=T-Systems Trust Center
+# Label: "T-TeleSec GlobalRoot Class 2"
+# Serial: 1
+# MD5 Fingerprint: 2b:9b:9e:e4:7b:6c:1f:00:72:1a:cc:c1:77:79:df:6a
+# SHA1 Fingerprint: 59:0d:2d:7d:88:4f:40:2e:61:7e:a5:62:32:17:65:cf:17:d8:94:e9
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Atos TrustedRoot 2011 O=Atos
+# Subject: CN=Atos TrustedRoot 2011 O=Atos
+# Label: "Atos TrustedRoot 2011"
+# Serial: 6643877497813316402
+# MD5 Fingerprint: ae:b9:c4:32:4b:ac:7f:5d:66:cc:77:94:bb:2a:77:56
+# SHA1 Fingerprint: 2b:b1:f5:3e:55:0c:1d:c5:f1:d4:e6:b7:6a:46:4b:55:06:02:ac:21
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 1 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 1 G3"
+# Serial: 687049649626669250736271037606554624078720034195
+# MD5 Fingerprint: a4:bc:5b:3f:fe:37:9a:fa:64:f0:e2:fa:05:3d:0b:ab
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 2 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 2 G3"
+# Serial: 390156079458959257446133169266079962026824725800
+# MD5 Fingerprint: af:0c:86:6e:bf:40:2d:7f:0b:3e:12:50:ba:12:3d:06
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Subject: CN=QuoVadis Root CA 3 G3 O=QuoVadis Limited
+# Label: "QuoVadis Root CA 3 G3"
+# Serial: 268090761170461462463995952157327242137089239581
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G2"
+# Serial: 15385348160840213938643033620894905419
+# MD5 Fingerprint: 92:38:b9:f8:63:24:82:65:2c:57:33:e6:fe:81:8f:9d
+# SHA1 Fingerprint: a1:4b:48:d9:43:ee:0a:0e:40:90:4f:3c:e0:a4:c0:91:93:51:5d:3f
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Assured ID Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Assured ID Root G3"
+# Serial: 15459312981008553731928384953135426796
+# MD5 Fingerprint: 7c:7f:65:31:0c:81:df:8d:ba:3e:99:e2:5c:ad:6e:fb
+# SHA1 Fingerprint: f5:17:a2:4f:9a:48:c6:c9:f8:a2:00:26:9f:dc:0f:48:2c:ab:30:89
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G2 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G2"
+# Serial: 4293743540046975378534879503202253541
+# MD5 Fingerprint: e4:a6:8a:c8:54:ac:52:42:46:0a:fd:72:48:1b:2a:44
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Global Root G3 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Global Root G3"
+# Serial: 7089244469030293291760083333884364146
+# MD5 Fingerprint: f5:5d:a4:50:a5:fb:28:7e:1e:0f:0d:cc:96:57:56:ca
+# SHA1 Fingerprint: 7e:04:de:89:6a:3e:66:6d:00:e6:87:d3:3f:fa:d9:3b:e8:3d:34:9e
+# SHA256 Fingerprint: 31:ad:66:48:f8:10:41:38:c7:38:f3:9e:a4:32:01:33:39:3e:3a:18:cc:02:29:6e:f9:7c:2a:c9:ef:67:31:d0
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Subject: CN=DigiCert Trusted Root G4 O=DigiCert Inc OU=www.digicert.com
+# Label: "DigiCert Trusted Root G4"
+# Serial: 7451500558977370777930084869016614236
+# MD5 Fingerprint: 78:f2:fc:aa:60:1f:2f:b4:eb:c9:37:ba:53:2e:75:49
+# SHA1 Fingerprint: dd:fb:16:cd:49:31:c9:73:a2:03:7d:3f:c8:3a:4d:7d:77:5d:05:e4
+# SHA256 Fingerprint: 55:2f:7b:dc:f1:a7:af:9e:6c:e6:72:01:7f:4f:12:ab:f7:72:40:c7:8e:76:1a:c2:03:d1:d9:d2:0a:c8:99:88
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Subject: CN=COMODO RSA Certification Authority O=COMODO CA Limited
+# Label: "COMODO RSA Certification Authority"
+# Serial: 101909084537582093308941363524873193117
+# MD5 Fingerprint: 1b:31:b0:71:40:36:cc:14:36:91:ad:c4:3e:fd:ec:18
+# SHA1 Fingerprint: af:e5:d2:44:a8:d1:19:42:30:ff:47:9f:e2:f8:97:bb:cd:7a:8c:b4
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust RSA Certification Authority O=The USERTRUST Network
+# Label: "USERTrust RSA Certification Authority"
+# Serial: 2645093764781058787591871645665788717
+# MD5 Fingerprint: 1b:fe:69:d1:91:b7:19:33:a3:72:a8:0f:e1:55:e5:b5
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Subject: CN=USERTrust ECC Certification Authority O=The USERTRUST Network
+# Label: "USERTrust ECC Certification Authority"
+# Serial: 123013823720199481456569720443997572134
+# MD5 Fingerprint: fa:68:bc:d9:b5:7f:ad:fd:c9:1d:06:83:28:cc:24:c1
+# SHA1 Fingerprint: d1:cb:ca:5d:b2:d5:2a:7f:69:3b:67:4d:e5:f0:5a:1d:0c:95:7d:f0
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign ECC Root CA - R5
+# Label: "GlobalSign ECC Root CA - R5"
+# Serial: 32785792099990507226680698011560947931244
+# MD5 Fingerprint: 9f:ad:3b:1c:02:1e:8a:ba:17:74:38:81:0c:a2:bc:08
+# SHA1 Fingerprint: 1f:24:c6:30:cd:a4:18:ef:20:69:ff:ad:4f:dd:5f:46:3a:1b:69:aa
+# SHA256 Fingerprint: 17:9f:bc:14:8a:3d:d0:0f:d2:4e:a1:34:58:cc:43:bf:a7:f5:9c:81:82:d7:83:a5:13:f6:eb:ec:10:0c:89:24
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Subject: CN=Staat der Nederlanden EV Root CA O=Staat der Nederlanden
+# Label: "Staat der Nederlanden EV Root CA"
+# Serial: 10000013
+# MD5 Fingerprint: fc:06:af:7b:e8:1a:f1:9a:b4:e8:d2:70:1f:c0:f5:ba
+# SHA1 Fingerprint: 76:e2:7e:c1:4f:db:82:c1:c0:a6:75:b5:05:be:3d:29:b4:ed:db:bb
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
+# Subject: CN=IdenTrust Commercial Root CA 1 O=IdenTrust
+# Label: "IdenTrust Commercial Root CA 1"
+# Serial: 13298821034946342390520003877796839426
+# MD5 Fingerprint: b3:3e:77:73:75:ee:a0:d3:e3:7e:49:63:49:59:bb:c7
+# SHA1 Fingerprint: df:71:7e:aa:4a:d9:4e:c9:55:84:99:60:2d:48:de:5f:bc:f0:3a:25
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
+# Subject: CN=IdenTrust Public Sector Root CA 1 O=IdenTrust
+# Label: "IdenTrust Public Sector Root CA 1"
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+# Issuer: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - G2 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2009 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G2"
+# Serial: 1246989352
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - EC1 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2012 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - EC1"
+# Serial: 51543124481930649114116133369
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Subject: CN=CFCA EV ROOT O=China Financial Certification Authority
+# Label: "CFCA EV ROOT"
+# Serial: 407555286
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GB CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GB CA"
+# Serial: 157768595616588414422159278966750757568
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+-----BEGIN CERTIFICATE-----
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+# SHA1 Fingerprint: ec:50:35:07:b2:15:c4:95:62:19:e2:a8:9a:5b:42:99:2c:4c:2c:20
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 1 O=Amazon
+# Subject: CN=Amazon Root CA 1 O=Amazon
+# Label: "Amazon Root CA 1"
+# Serial: 143266978916655856878034712317230054538369994
+# MD5 Fingerprint: 43:c6:bf:ae:ec:fe:ad:2f:18:c6:88:68:30:fc:c8:e6
+# SHA1 Fingerprint: 8d:a7:f9:65:ec:5e:fc:37:91:0f:1c:6e:59:fd:c1:cc:6a:6e:de:16
+# SHA256 Fingerprint: 8e:cd:e6:88:4f:3d:87:b1:12:5b:a3:1a:c3:fc:b1:3d:70:16:de:7f:57:cc:90:4f:e1:cb:97:c6:ae:98:19:6e
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 2 O=Amazon
+# Subject: CN=Amazon Root CA 2 O=Amazon
+# Label: "Amazon Root CA 2"
+# Serial: 143266982885963551818349160658925006970653239
+# MD5 Fingerprint: c8:e5:8d:ce:a8:42:e2:7a:c0:2a:5c:7c:9e:26:bf:66
+# SHA1 Fingerprint: 5a:8c:ef:45:d7:a6:98:59:76:7a:8c:8b:44:96:b5:78:cf:47:4b:1a
+# SHA256 Fingerprint: 1b:a5:b2:aa:8c:65:40:1a:82:96:01:18:f8:0b:ec:4f:62:30:4d:83:ce:c4:71:3a:19:c3:9c:01:1e:a4:6d:b4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 3 O=Amazon
+# Subject: CN=Amazon Root CA 3 O=Amazon
+# Label: "Amazon Root CA 3"
+# Serial: 143266986699090766294700635381230934788665930
+# MD5 Fingerprint: a0:d4:ef:0b:f7:b5:d8:49:95:2a:ec:f5:c4:fc:81:87
+# SHA1 Fingerprint: 0d:44:dd:8c:3c:8c:1a:1a:58:75:64:81:e9:0f:2e:2a:ff:b3:d2:6e
+# SHA256 Fingerprint: 18:ce:6c:fe:7b:f1:4e:60:b2:e3:47:b8:df:e8:68:cb:31:d0:2e:bb:3a:da:27:15:69:f5:03:43:b4:6d:b3:a4
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Amazon Root CA 4 O=Amazon
+# Subject: CN=Amazon Root CA 4 O=Amazon
+# Label: "Amazon Root CA 4"
+# Serial: 143266989758080763974105200630763877849284878
+# MD5 Fingerprint: 89:bc:27:d5:eb:17:8d:06:6a:69:d5:fd:89:47:b4:cd
+# SHA1 Fingerprint: f6:10:84:07:d6:f8:bb:67:98:0c:c2:e2:44:c2:eb:ae:1c:ef:63:be
+# SHA256 Fingerprint: e3:5d:28:41:9e:d0:20:25:cf:a6:90:38:cd:62:39:62:45:8d:a5:c6:95:fb:de:a3:c2:2b:0b:fb:25:89:70:92
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Subject: CN=TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1 O=Turkiye Bilimsel ve Teknolojik Arastirma Kurumu - TUBITAK OU=Kamu Sertifikasyon Merkezi - Kamu SM
+# Label: "TUBITAK Kamu SM SSL Kok Sertifikasi - Surum 1"
+# Serial: 1
+# MD5 Fingerprint: dc:00:81:dc:69:2f:3e:2f:b0:3b:f6:3d:5a:91:8e:49
+# SHA1 Fingerprint: 31:43:64:9b:ec:ce:27:ec:ed:3a:3f:0b:8f:0d:e4:e8:91:dd:ee:ca
+# SHA256 Fingerprint: 46:ed:c3:68:90:46:d5:3a:45:3f:b3:10:4a:b8:0d:ca:ec:65:8b:26:60:ea:16:29:dd:7e:86:79:90:64:87:16
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
+# Subject: CN=GDCA TrustAUTH R5 ROOT O=GUANG DONG CERTIFICATE AUTHORITY CO.,LTD.
+# Label: "GDCA TrustAUTH R5 ROOT"
+# Serial: 9009899650740120186
+# MD5 Fingerprint: 63:cc:d9:3d:34:35:5c:6f:53:a3:e2:08:70:48:1f:b4
+# SHA1 Fingerprint: 0f:36:38:5b:81:1a:25:c3:9b:31:4e:83:ca:e9:34:66:70:cc:74:b4
+# SHA256 Fingerprint: bf:ff:8f:d0:44:33:48:7d:6a:8a:a6:0c:1a:29:76:7a:9f:c2:bb:b0:5e:42:0f:71:3a:13:b9:92:89:1d:38:93
+-----BEGIN CERTIFICATE-----
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+# Label: "TrustCor RootCert CA-1"
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+-----BEGIN CERTIFICATE-----
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+# Label: "TrustCor RootCert CA-2"
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+# Issuer: CN=TrustCor ECA-1 O=TrustCor Systems S. de R.L. OU=TrustCor Certificate Authority
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+# Label: "TrustCor ECA-1"
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority RSA O=SSL Corporation
+# Label: "SSL.com Root Certification Authority RSA"
+# Serial: 8875640296558310041
+# MD5 Fingerprint: 86:69:12:c0:70:f1:ec:ac:ac:c2:d5:bc:a5:5b:a1:29
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com Root Certification Authority ECC"
+# Serial: 8495723813297216424
+# MD5 Fingerprint: 2e:da:e4:39:7f:9c:8f:37:d1:70:9f:26:17:51:3a:8e
+# SHA1 Fingerprint: c3:19:7c:39:24:e6:54:af:1b:c4:ab:20:95:7a:e2:c3:0e:13:02:6a
+# SHA256 Fingerprint: 34:17:bb:06:cc:60:07:da:1b:96:1c:92:0b:8a:b4:ce:3f:ad:82:0e:4a:a3:0b:9a:cb:c4:a7:4e:bd:ce:bc:65
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority RSA R2 O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority RSA R2"
+# Serial: 6248227494352943350
+# MD5 Fingerprint: e1:1e:31:58:1a:ae:54:53:02:f6:17:6a:11:7b:4d:95
+# SHA1 Fingerprint: 74:3a:f0:52:9b:d0:32:a0:f4:4a:83:cd:d4:ba:a9:7b:7c:2e:c4:9a
+# SHA256 Fingerprint: 2e:7b:f1:6c:c2:24:85:a7:bb:e2:aa:86:96:75:07:61:b0:ae:39:be:3b:2f:e9:d0:cc:6d:4e:f7:34:91:42:5c
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Subject: CN=SSL.com EV Root Certification Authority ECC O=SSL Corporation
+# Label: "SSL.com EV Root Certification Authority ECC"
+# Serial: 3182246526754555285
+# MD5 Fingerprint: 59:53:22:65:83:42:01:54:c0:ce:42:b9:5a:7c:f2:90
+# SHA1 Fingerprint: 4c:dd:51:a3:d1:f5:20:32:14:b0:c6:c5:32:23:03:91:c7:46:42:6d
+# SHA256 Fingerprint: 22:a2:c1:f7:bd:ed:70:4c:c1:e7:01:b5:f4:08:c3:10:88:0f:e9:56:b5:de:2a:4a:44:f9:9c:87:3a:25:a7:c8
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Subject: CN=GlobalSign O=GlobalSign OU=GlobalSign Root CA - R6
+# Label: "GlobalSign Root CA - R6"
+# Serial: 1417766617973444989252670301619537
+# MD5 Fingerprint: 4f:dd:07:e4:d4:22:64:39:1e:0c:37:42:ea:d1:c6:ae
+# SHA1 Fingerprint: 80:94:64:0e:b5:a7:a1:ca:11:9c:1f:dd:d5:9f:81:02:63:a7:fb:d1
+# SHA256 Fingerprint: 2c:ab:ea:fe:37:d0:6c:a2:2a:ba:73:91:c0:03:3d:25:98:29:52:c4:53:64:73:49:76:3a:3a:b5:ad:6c:cf:69
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Subject: CN=OISTE WISeKey Global Root GC CA O=WISeKey OU=OISTE Foundation Endorsed
+# Label: "OISTE WISeKey Global Root GC CA"
+# Serial: 44084345621038548146064804565436152554
+# MD5 Fingerprint: a9:d6:b9:2d:2f:93:64:f8:a5:69:ca:91:e9:68:07:23
+# SHA1 Fingerprint: e0:11:84:5e:34:de:be:88:81:b9:9c:f6:16:26:d1:96:1f:c3:b9:31
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=UCA Global G2 Root O=UniTrust
+# Subject: CN=UCA Global G2 Root O=UniTrust
+# Label: "UCA Global G2 Root"
+# Serial: 124779693093741543919145257850076631279
+# MD5 Fingerprint: 80:fe:f0:c4:4a:f0:5c:62:32:9f:1c:ba:78:a9:50:f8
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=UCA Extended Validation Root O=UniTrust
+# Subject: CN=UCA Extended Validation Root O=UniTrust
+# Label: "UCA Extended Validation Root"
+# Serial: 106100277556486529736699587978573607008
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Subject: CN=Certigna Root CA O=Dhimyotis OU=0002 48146308100036
+# Label: "Certigna Root CA"
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign Root CA - G1 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign Root CA - G1"
+# Serial: 235931866688319308814040
+# MD5 Fingerprint: 9c:42:84:57:dd:cb:0b:a7:2e:95:ad:b6:f3:da:bc:ac
+# SHA1 Fingerprint: 8a:c7:ad:8f:73:ac:4e:c1:b5:75:4d:a5:40:f4:fc:cf:7c:b5:8e:8c
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - G3 O=eMudhra Technologies Limited OU=emSign PKI
+# Label: "emSign ECC Root CA - G3"
+# Serial: 287880440101571086945156
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign Root CA - C1 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign Root CA - C1"
+# Serial: 825510296613316004955058
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Subject: CN=emSign ECC Root CA - C3 O=eMudhra Inc OU=emSign PKI
+# Label: "emSign ECC Root CA - C3"
+# Serial: 582948710642506000014504
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+# SHA1 Fingerprint: b6:af:43:c2:9b:81:53:7d:f6:ef:6b:c3:1f:1f:60:15:0c:ee:48:66
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Subject: CN=Hongkong Post Root CA 3 O=Hongkong Post
+# Label: "Hongkong Post Root CA 3"
+# Serial: 46170865288971385588281144162979347873371282084
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Subject: CN=Entrust Root Certification Authority - G4 O=Entrust, Inc. OU=See www.entrust.net/legal-terms/(c) 2015 Entrust, Inc. - for authorized use only
+# Label: "Entrust Root Certification Authority - G4"
+# Serial: 289383649854506086828220374796556676440
+# MD5 Fingerprint: 89:53:f1:83:23:b7:7c:8e:05:f1:8c:71:38:4e:1f:88
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Microsoft ECC Root Certificate Authority 2017 O=Microsoft Corporation
+# Subject: CN=Microsoft ECC Root Certificate Authority 2017 O=Microsoft Corporation
+# Label: "Microsoft ECC Root Certificate Authority 2017"
+# Serial: 136839042543790627607696632466672567020
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=Microsoft RSA Root Certificate Authority 2017 O=Microsoft Corporation
+# Subject: CN=Microsoft RSA Root Certificate Authority 2017 O=Microsoft Corporation
+# Label: "Microsoft RSA Root Certificate Authority 2017"
+# Serial: 40975477897264996090493496164228220339
+# MD5 Fingerprint: 10:ff:00:ff:cf:c9:f8:c7:7a:c0:ee:35:8e:c9:0f:47
+# SHA1 Fingerprint: 73:a5:e6:4a:3b:ff:83:16:ff:0e:dc:cc:61:8a:90:6e:4e:ae:4d:74
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=e-Szigno Root CA 2017 O=Microsec Ltd.
+# Subject: CN=e-Szigno Root CA 2017 O=Microsec Ltd.
+# Label: "e-Szigno Root CA 2017"
+# Serial: 411379200276854331539784714
+# MD5 Fingerprint: de:1f:f6:9e:84:ae:a7:b4:21:ce:1e:58:7d:d1:84:98
+# SHA1 Fingerprint: 89:d4:83:03:4f:9e:9a:48:80:5f:72:37:d4:a9:a6:ef:cb:7c:1f:d1
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: O=CERTSIGN SA OU=certSIGN ROOT CA G2
+# Subject: O=CERTSIGN SA OU=certSIGN ROOT CA G2
+# Label: "certSIGN Root CA G2"
+# Serial: 313609486401300475190
+# MD5 Fingerprint: 8c:f1:75:8a:c6:19:cf:94:b7:f7:65:20:87:c3:97:c7
+# SHA1 Fingerprint: 26:f9:93:b4:ed:3d:28:27:b0:b9:4b:a7:e9:15:1d:a3:8d:92:e5:32
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Trustwave Global Certification Authority O=Trustwave Holdings, Inc.
+# Subject: CN=Trustwave Global Certification Authority O=Trustwave Holdings, Inc.
+# Label: "Trustwave Global Certification Authority"
+# Serial: 1846098327275375458322922162
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Trustwave Global ECC P256 Certification Authority O=Trustwave Holdings, Inc.
+# Subject: CN=Trustwave Global ECC P256 Certification Authority O=Trustwave Holdings, Inc.
+# Label: "Trustwave Global ECC P256 Certification Authority"
+# Serial: 4151900041497450638097112925
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Trustwave Global ECC P384 Certification Authority O=Trustwave Holdings, Inc.
+# Subject: CN=Trustwave Global ECC P384 Certification Authority O=Trustwave Holdings, Inc.
+# Label: "Trustwave Global ECC P384 Certification Authority"
+# Serial: 2704997926503831671788816187
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=NAVER Global Root Certification Authority O=NAVER BUSINESS PLATFORM Corp.
+# Subject: CN=NAVER Global Root Certification Authority O=NAVER BUSINESS PLATFORM Corp.
+# Label: "NAVER Global Root Certification Authority"
+# Serial: 9013692873798656336226253319739695165984492813
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=AC RAIZ FNMT-RCM SERVIDORES SEGUROS O=FNMT-RCM OU=Ceres
+# Subject: CN=AC RAIZ FNMT-RCM SERVIDORES SEGUROS O=FNMT-RCM OU=Ceres
+# Label: "AC RAIZ FNMT-RCM SERVIDORES SEGUROS"
+# Serial: 131542671362353147877283741781055151509
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GlobalSign Root R46 O=GlobalSign nv-sa
+# Subject: CN=GlobalSign Root R46 O=GlobalSign nv-sa
+# Label: "GlobalSign Root R46"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GlobalSign Root E46 O=GlobalSign nv-sa
+# Subject: CN=GlobalSign Root E46 O=GlobalSign nv-sa
+# Label: "GlobalSign Root E46"
+# Serial: 1552617690338932563915843282459653771421763
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GLOBALTRUST 2020 O=e-commerce monitoring GmbH
+# Subject: CN=GLOBALTRUST 2020 O=e-commerce monitoring GmbH
+# Label: "GLOBALTRUST 2020"
+# Serial: 109160994242082918454945253
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=ANF Secure Server Root CA O=ANF Autoridad de Certificacion OU=ANF CA Raiz
+# Subject: CN=ANF Secure Server Root CA O=ANF Autoridad de Certificacion OU=ANF CA Raiz
+# Label: "ANF Secure Server Root CA"
+# Serial: 996390341000653745
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certum EC-384 CA O=Asseco Data Systems S.A. OU=Certum Certification Authority
+# Subject: CN=Certum EC-384 CA O=Asseco Data Systems S.A. OU=Certum Certification Authority
+# Label: "Certum EC-384 CA"
+# Serial: 160250656287871593594747141429395092468
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Certum Trusted Root CA O=Asseco Data Systems S.A. OU=Certum Certification Authority
+# Subject: CN=Certum Trusted Root CA O=Asseco Data Systems S.A. OU=Certum Certification Authority
+# Label: "Certum Trusted Root CA"
+# Serial: 40870380103424195783807378461123655149
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=TunTrust Root CA O=Agence Nationale de Certification Electronique
+# Subject: CN=TunTrust Root CA O=Agence Nationale de Certification Electronique
+# Label: "TunTrust Root CA"
+# Serial: 108534058042236574382096126452369648152337120275
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=HARICA TLS RSA Root CA 2021 O=Hellenic Academic and Research Institutions CA
+# Subject: CN=HARICA TLS RSA Root CA 2021 O=Hellenic Academic and Research Institutions CA
+# Label: "HARICA TLS RSA Root CA 2021"
+# Serial: 76817823531813593706434026085292783742
+# MD5 Fingerprint: 65:47:9b:58:86:dd:2c:f0:fc:a2:84:1f:1e:96:c4:91
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=HARICA TLS ECC Root CA 2021 O=Hellenic Academic and Research Institutions CA
+# Subject: CN=HARICA TLS ECC Root CA 2021 O=Hellenic Academic and Research Institutions CA
+# Label: "HARICA TLS ECC Root CA 2021"
+# Serial: 137515985548005187474074462014555733966
+# MD5 Fingerprint: ae:f7:4c:e5:66:35:d1:b7:9b:8c:22:93:74:d3:4b:b0
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Subject: CN=Autoridad de Certificacion Firmaprofesional CIF A62634068
+# Label: "Autoridad de Certificacion Firmaprofesional CIF A62634068"
+# Serial: 1977337328857672817
+# MD5 Fingerprint: 4e:6e:9b:54:4c:ca:b7:fa:48:e4:90:b1:15:4b:1c:a3
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=vTrus ECC Root CA O=iTrusChina Co.,Ltd.
+# Subject: CN=vTrus ECC Root CA O=iTrusChina Co.,Ltd.
+# Label: "vTrus ECC Root CA"
+# Serial: 630369271402956006249506845124680065938238527194
+# MD5 Fingerprint: de:4b:c1:f5:52:8c:9b:43:e1:3e:8f:55:54:17:8d:85
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=vTrus Root CA O=iTrusChina Co.,Ltd.
+# Subject: CN=vTrus Root CA O=iTrusChina Co.,Ltd.
+# Label: "vTrus Root CA"
+# Serial: 387574501246983434957692974888460947164905180485
+# MD5 Fingerprint: b8:c9:37:df:fa:6b:31:84:64:c5:ea:11:6a:1b:75:fc
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+-----BEGIN CERTIFICATE-----
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+# Label: "HiPKI Root CA - G1"
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+# Label: "GlobalSign ECC Root CA - R4"
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GTS Root R1 O=Google Trust Services LLC
+# Subject: CN=GTS Root R1 O=Google Trust Services LLC
+# Label: "GTS Root R1"
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+-----END CERTIFICATE-----
+
+# Issuer: CN=GTS Root R3 O=Google Trust Services LLC
+# Subject: CN=GTS Root R3 O=Google Trust Services LLC
+# Label: "GTS Root R3"
+# Serial: 159662495401136852707857743206
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=GTS Root R4 O=Google Trust Services LLC
+# Subject: CN=GTS Root R4 O=Google Trust Services LLC
+# Label: "GTS Root R4"
+# Serial: 159662532700760215368942768210
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=Telia Root CA v2 O=Telia Finland Oyj
+# Subject: CN=Telia Root CA v2 O=Telia Finland Oyj
+# Label: "Telia Root CA v2"
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=D-TRUST BR Root CA 1 2020 O=D-Trust GmbH
+# Subject: CN=D-TRUST BR Root CA 1 2020 O=D-Trust GmbH
+# Label: "D-TRUST BR Root CA 1 2020"
+# Serial: 165870826978392376648679885835942448534
+# MD5 Fingerprint: b5:aa:4b:d5:ed:f7:e3:55:2e:8f:72:0a:f3:75:b8:ed
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=D-TRUST EV Root CA 1 2020 O=D-Trust GmbH
+# Subject: CN=D-TRUST EV Root CA 1 2020 O=D-Trust GmbH
+# Label: "D-TRUST EV Root CA 1 2020"
+# Serial: 126288379621884218666039612629459926992
+# MD5 Fingerprint: 8c:2d:9d:70:9f:48:99:11:06:11:fb:e9:cb:30:c0:6e
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=DigiCert TLS ECC P384 Root G5 O=DigiCert, Inc.
+# Subject: CN=DigiCert TLS ECC P384 Root G5 O=DigiCert, Inc.
+# Label: "DigiCert TLS ECC P384 Root G5"
+# Serial: 13129116028163249804115411775095713523
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+
+# Issuer: CN=DigiCert TLS RSA4096 Root G5 O=DigiCert, Inc.
+# Subject: CN=DigiCert TLS RSA4096 Root G5 O=DigiCert, Inc.
+# Label: "DigiCert TLS RSA4096 Root G5"
+# Serial: 11930366277458970227240571539258396554
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Certainly Root R1 O=Certainly
+# Subject: CN=Certainly Root R1 O=Certainly
+# Label: "Certainly Root R1"
+# Serial: 188833316161142517227353805653483829216
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Certainly Root E1 O=Certainly
+# Subject: CN=Certainly Root E1 O=Certainly
+# Label: "Certainly Root E1"
+# Serial: 8168531406727139161245376702891150584
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=E-Tugra Global Root CA RSA v3 O=E-Tugra EBG A.S. OU=E-Tugra Trust Center
+# Subject: CN=E-Tugra Global Root CA RSA v3 O=E-Tugra EBG A.S. OU=E-Tugra Trust Center
+# Label: "E-Tugra Global Root CA RSA v3"
+# Serial: 75951268308633135324246244059508261641472512052
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+-----BEGIN CERTIFICATE-----
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+# Issuer: CN=E-Tugra Global Root CA ECC v3 O=E-Tugra EBG A.S. OU=E-Tugra Trust Center
+# Subject: CN=E-Tugra Global Root CA ECC v3 O=E-Tugra EBG A.S. OU=E-Tugra Trust Center
+# Label: "E-Tugra Global Root CA ECC v3"
+# Serial: 218504919822255052842371958738296604628416471745
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+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
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+# Issuer: CN=Security Communication RootCA3 O=SECOM Trust Systems CO.,LTD.
+# Subject: CN=Security Communication RootCA3 O=SECOM Trust Systems CO.,LTD.
+# Label: "Security Communication RootCA3"
+# Serial: 16247922307909811815
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+-----BEGIN CERTIFICATE-----
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+
+# Issuer: CN=Security Communication ECC RootCA1 O=SECOM Trust Systems CO.,LTD.
+# Subject: CN=Security Communication ECC RootCA1 O=SECOM Trust Systems CO.,LTD.
+# Label: "Security Communication ECC RootCA1"
+# Serial: 15446673492073852651
+# MD5 Fingerprint: 7e:43:b0:92:68:ec:05:43:4c:98:ab:5d:35:2e:7e:86
+# SHA1 Fingerprint: b8:0e:26:a9:bf:d2:b2:3b:c0:ef:46:c9:ba:c7:bb:f6:1d:0d:41:41
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+-----BEGIN CERTIFICATE-----
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+AASkpW9gAwPDvTH00xecK4R1rOX9PVdu12O/5gSJko6BnOPpR27KkBLIE+Cnnfdl
+dB9sELLo5OnvbYUymUSxXv3MdhDYW72ixvnWQuRXdtyQwjWpS4g8EkdtXP9JTxpK
+ULGjQjBAMB0GA1UdDgQWBBSGHOf+LaVKiwj+KBH6vqNm+GBZLzAOBgNVHQ8BAf8E
+BAMCAQYwDwYDVR0TAQH/BAUwAwEB/zAKBggqhkjOPQQDAwNoADBlAjAVXUI9/Lbu
+9zuxNuie9sRGKEkz0FhDKmMpzE2xtHqiuQ04pV1IKv3LsnNdo4gIxwwCMQDAqy0O
+be0YottT6SXbVQjgUMzfRGEWgqtJsLKB7HOHeLRMsmIbEvoWTSVLY70eN9k=
+-----END CERTIFICATE-----
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/certifi/core.py b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/core.py
new file mode 100644
index 0000000..c3e5466
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/certifi/core.py
@@ -0,0 +1,108 @@
+"""
+certifi.py
+~~~~~~~~~~
+
+This module returns the installation location of cacert.pem or its contents.
+"""
+import sys
+
+
+if sys.version_info >= (3, 11):
+
+    from importlib.resources import as_file, files
+
+    _CACERT_CTX = None
+    _CACERT_PATH = None
+
+    def where() -> str:
+        # This is slightly terrible, but we want to delay extracting the file
+        # in cases where we're inside of a zipimport situation until someone
+        # actually calls where(), but we don't want to re-extract the file
+        # on every call of where(), so we'll do it once then store it in a
+        # global variable.
+        global _CACERT_CTX
+        global _CACERT_PATH
+        if _CACERT_PATH is None:
+            # This is slightly janky, the importlib.resources API wants you to
+            # manage the cleanup of this file, so it doesn't actually return a
+            # path, it returns a context manager that will give you the path
+            # when you enter it and will do any cleanup when you leave it. In
+            # the common case of not needing a temporary file, it will just
+            # return the file system location and the __exit__() is a no-op.
+            #
+            # We also have to hold onto the actual context manager, because
+            # it will do the cleanup whenever it gets garbage collected, so
+            # we will also store that at the global level as well.
+            _CACERT_CTX = as_file(files("pip._vendor.certifi").joinpath("cacert.pem"))
+            _CACERT_PATH = str(_CACERT_CTX.__enter__())
+
+        return _CACERT_PATH
+
+    def contents() -> str:
+        return files("pip._vendor.certifi").joinpath("cacert.pem").read_text(encoding="ascii")
+
+elif sys.version_info >= (3, 7):
+
+    from importlib.resources import path as get_path, read_text
+
+    _CACERT_CTX = None
+    _CACERT_PATH = None
+
+    def where() -> str:
+        # This is slightly terrible, but we want to delay extracting the
+        # file in cases where we're inside of a zipimport situation until
+        # someone actually calls where(), but we don't want to re-extract
+        # the file on every call of where(), so we'll do it once then store
+        # it in a global variable.
+        global _CACERT_CTX
+        global _CACERT_PATH
+        if _CACERT_PATH is None:
+            # This is slightly janky, the importlib.resources API wants you
+            # to manage the cleanup of this file, so it doesn't actually
+            # return a path, it returns a context manager that will give
+            # you the path when you enter it and will do any cleanup when
+            # you leave it. In the common case of not needing a temporary
+            # file, it will just return the file system location and the
+            # __exit__() is a no-op.
+            #
+            # We also have to hold onto the actual context manager, because
+            # it will do the cleanup whenever it gets garbage collected, so
+            # we will also store that at the global level as well.
+            _CACERT_CTX = get_path("pip._vendor.certifi", "cacert.pem")
+            _CACERT_PATH = str(_CACERT_CTX.__enter__())
+
+        return _CACERT_PATH
+
+    def contents() -> str:
+        return read_text("pip._vendor.certifi", "cacert.pem", encoding="ascii")
+
+else:
+    import os
+    import types
+    from typing import Union
+
+    Package = Union[types.ModuleType, str]
+    Resource = Union[str, "os.PathLike"]
+
+    # This fallback will work for Python versions prior to 3.7 that lack the
+    # importlib.resources module but relies on the existing `where` function
+    # so won't address issues with environments like PyOxidizer that don't set
+    # __file__ on modules.
+    def read_text(
+        package: Package,
+        resource: Resource,
+        encoding: str = 'utf-8',
+        errors: str = 'strict'
+    ) -> str:
+        with open(where(), encoding=encoding) as data:
+            return data.read()
+
+    # If we don't have importlib.resources, then we will just do the old logic
+    # of assuming we're on the filesystem and munge the path directly.
+    def where() -> str:
+        f = os.path.dirname(__file__)
+
+        return os.path.join(f, "cacert.pem")
+
+    def contents() -> str:
+        return read_text("pip._vendor.certifi", "cacert.pem", encoding="ascii")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/__init__.py
new file mode 100644
index 0000000..e91ad61
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/__init__.py
@@ -0,0 +1,93 @@
+######################## BEGIN LICENSE BLOCK ########################
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import InputState
+from .universaldetector import UniversalDetector
+from .version import VERSION, __version__
+
+__all__ = ["UniversalDetector", "detect", "detect_all", "__version__", "VERSION"]
+
+
+def detect(byte_str):
+    """
+    Detect the encoding of the given byte string.
+
+    :param byte_str:     The byte sequence to examine.
+    :type byte_str:      ``bytes`` or ``bytearray``
+    """
+    if not isinstance(byte_str, bytearray):
+        if not isinstance(byte_str, bytes):
+            raise TypeError(
+                f"Expected object of type bytes or bytearray, got: {type(byte_str)}"
+            )
+        byte_str = bytearray(byte_str)
+    detector = UniversalDetector()
+    detector.feed(byte_str)
+    return detector.close()
+
+
+def detect_all(byte_str, ignore_threshold=False):
+    """
+    Detect all the possible encodings of the given byte string.
+
+    :param byte_str:          The byte sequence to examine.
+    :type byte_str:           ``bytes`` or ``bytearray``
+    :param ignore_threshold:  Include encodings that are below
+                              ``UniversalDetector.MINIMUM_THRESHOLD``
+                              in results.
+    :type ignore_threshold:   ``bool``
+    """
+    if not isinstance(byte_str, bytearray):
+        if not isinstance(byte_str, bytes):
+            raise TypeError(
+                f"Expected object of type bytes or bytearray, got: {type(byte_str)}"
+            )
+        byte_str = bytearray(byte_str)
+
+    detector = UniversalDetector()
+    detector.feed(byte_str)
+    detector.close()
+
+    if detector.input_state == InputState.HIGH_BYTE:
+        results = []
+        probers = []
+        for prober in detector.charset_probers:
+            if hasattr(prober, "probers"):
+                probers.extend(p for p in prober.probers)
+            else:
+                probers.append(prober)
+        for prober in probers:
+            if ignore_threshold or prober.get_confidence() > detector.MINIMUM_THRESHOLD:
+                charset_name = prober.charset_name or ""
+                lower_charset_name = charset_name.lower()
+                # Use Windows encoding name instead of ISO-8859 if we saw any
+                # extra Windows-specific bytes
+                if lower_charset_name.startswith("iso-8859") and detector.has_win_bytes:
+                    charset_name = detector.ISO_WIN_MAP.get(
+                        lower_charset_name, charset_name
+                    )
+                results.append(
+                    {
+                        "encoding": charset_name,
+                        "confidence": prober.get_confidence(),
+                        "language": prober.language,
+                    }
+                )
+        if len(results) > 0:
+            return sorted(results, key=lambda result: -result["confidence"])
+
+    return [detector.result]
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@@ -0,0 +1,386 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Big5 frequency table
+# by Taiwan's Mandarin Promotion Council
+# <http://www.edu.tw:81/mandr/>
+#
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Ideal Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+BIG5_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+# Char to FreqOrder table
+BIG5_TABLE_SIZE = 5376
+# fmt: off
+BIG5_CHAR_TO_FREQ_ORDER = (
+   1,1801,1506, 255,1431, 198,   9,  82,   6,5008, 177, 202,3681,1256,2821, 110, #   16
+3814,  33,3274, 261,  76,  44,2114,  16,2946,2187,1176, 659,3971,  26,3451,2653, #   32
+1198,3972,3350,4202, 410,2215, 302, 590, 361,1964,   8, 204,  58,4510,5009,1932, #   48
+  63,5010,5011, 317,1614,  75, 222, 159,4203,2417,1480,5012,3555,3091, 224,2822, #   64
+3682,   3,  10,3973,1471,  29,2787,1135,2866,1940, 873, 130,3275,1123, 312,5013, #   80
+4511,2052, 507, 252, 682,5014, 142,1915, 124, 206,2947,  34,3556,3204,  64, 604, #   96
+5015,2501,1977,1978, 155,1991, 645, 641,1606,5016,3452, 337,  72, 406,5017,  80, #  112
+ 630, 238,3205,1509, 263, 939,1092,2654, 756,1440,1094,3453, 449,  69,2987, 591, #  128
+ 179,2096, 471, 115,2035,1844,  60,  50,2988, 134, 806,1869, 734,2036,3454, 180, #  144
+ 995,1607, 156, 537,2907, 688,5018, 319,1305, 779,2145, 514,2379, 298,4512, 359, #  160
+2502,  90,2716,1338, 663,  11, 906,1099,2553,  20,2441, 182, 532,1716,5019, 732, #  176
+1376,4204,1311,1420,3206,  25,2317,1056, 113, 399, 382,1950, 242,3455,2474, 529, #  192
+3276, 475,1447,3683,5020, 117,  21, 656, 810,1297,2300,2334,3557,5021, 126,4205, #  208
+ 706, 456, 150, 613,4513,  71,1118,2037,4206, 145,3092,  85, 835, 486,2115,1246, #  224
+1426, 428, 727,1285,1015, 800, 106, 623, 303,1281,5022,2128,2359, 347,3815, 221, #  240
+3558,3135,5023,1956,1153,4207,  83, 296,1199,3093, 192, 624,  93,5024, 822,1898, #  256
+2823,3136, 795,2065, 991,1554,1542,1592,  27,  43,2867, 859, 139,1456, 860,4514, #  272
+ 437, 712,3974, 164,2397,3137, 695, 211,3037,2097, 195,3975,1608,3559,3560,3684, #  288
+3976, 234, 811,2989,2098,3977,2233,1441,3561,1615,2380, 668,2077,1638, 305, 228, #  304
+1664,4515, 467, 415,5025, 262,2099,1593, 239, 108, 300, 200,1033, 512,1247,2078, #  320
+5026,5027,2176,3207,3685,2682, 593, 845,1062,3277,  88,1723,2038,3978,1951, 212, #  336
+ 266, 152, 149, 468,1899,4208,4516,  77, 187,5028,3038,  37,   5,2990,5029,3979, #  352
+5030,5031,  39,2524,4517,2908,3208,2079,  55, 148,  74,4518, 545, 483,1474,1029, #  368
+1665, 217,1870,1531,3138,1104,2655,4209,  24, 172,3562, 900,3980,3563,3564,4519, #  384
+  32,1408,2824,1312, 329, 487,2360,2251,2717, 784,2683,   4,3039,3351,1427,1789, #  400
+ 188, 109, 499,5032,3686,1717,1790, 888,1217,3040,4520,5033,3565,5034,3352,1520, #  416
+3687,3981, 196,1034, 775,5035,5036, 929,1816, 249, 439,  38,5037,1063,5038, 794, #  432
+3982,1435,2301,  46, 178,3278,2066,5039,2381,5040, 214,1709,4521, 804,  35, 707, #  448
+ 324,3688,1601,2554, 140, 459,4210,5041,5042,1365, 839, 272, 978,2262,2580,3456, #  464
+2129,1363,3689,1423, 697, 100,3094,  48,  70,1231, 495,3139,2196,5043,1294,5044, #  480
+2080, 462, 586,1042,3279, 853, 256, 988, 185,2382,3457,1698, 434,1084,5045,3458, #  496
+ 314,2625,2788,4522,2335,2336, 569,2285, 637,1817,2525, 757,1162,1879,1616,3459, #  512
+ 287,1577,2116, 768,4523,1671,2868,3566,2526,1321,3816, 909,2418,5046,4211, 933, #  528
+3817,4212,2053,2361,1222,4524, 765,2419,1322, 786,4525,5047,1920,1462,1677,2909, #  544
+1699,5048,4526,1424,2442,3140,3690,2600,3353,1775,1941,3460,3983,4213, 309,1369, #  560
+1130,2825, 364,2234,1653,1299,3984,3567,3985,3986,2656, 525,1085,3041, 902,2001, #  576
+1475, 964,4527, 421,1845,1415,1057,2286, 940,1364,3141, 376,4528,4529,1381,   7, #  592
+2527, 983,2383, 336,1710,2684,1846, 321,3461, 559,1131,3042,2752,1809,1132,1313, #  608
+ 265,1481,1858,5049, 352,1203,2826,3280, 167,1089, 420,2827, 776, 792,1724,3568, #  624
+4214,2443,3281,5050,4215,5051, 446, 229, 333,2753, 901,3818,1200,1557,4530,2657, #  640
+1921, 395,2754,2685,3819,4216,1836, 125, 916,3209,2626,4531,5052,5053,3820,5054, #  656
+5055,5056,4532,3142,3691,1133,2555,1757,3462,1510,2318,1409,3569,5057,2146, 438, #  672
+2601,2910,2384,3354,1068, 958,3043, 461, 311,2869,2686,4217,1916,3210,4218,1979, #  688
+ 383, 750,2755,2627,4219, 274, 539, 385,1278,1442,5058,1154,1965, 384, 561, 210, #  704
+  98,1295,2556,3570,5059,1711,2420,1482,3463,3987,2911,1257, 129,5060,3821, 642, #  720
+ 523,2789,2790,2658,5061, 141,2235,1333,  68, 176, 441, 876, 907,4220, 603,2602, #  736
+ 710, 171,3464, 404, 549,  18,3143,2398,1410,3692,1666,5062,3571,4533,2912,4534, #  752
+5063,2991, 368,5064, 146, 366,  99, 871,3693,1543, 748, 807,1586,1185,  22,2263, #  768
+ 379,3822,3211,5065,3212, 505,1942,2628,1992,1382,2319,5066, 380,2362, 218, 702, #  784
+1818,1248,3465,3044,3572,3355,3282,5067,2992,3694, 930,3283,3823,5068,  59,5069, #  800
+ 585, 601,4221, 497,3466,1112,1314,4535,1802,5070,1223,1472,2177,5071, 749,1837, #  816
+ 690,1900,3824,1773,3988,1476, 429,1043,1791,2236,2117, 917,4222, 447,1086,1629, #  832
+5072, 556,5073,5074,2021,1654, 844,1090, 105, 550, 966,1758,2828,1008,1783, 686, #  848
+1095,5075,2287, 793,1602,5076,3573,2603,4536,4223,2948,2302,4537,3825, 980,2503, #  864
+ 544, 353, 527,4538, 908,2687,2913,5077, 381,2629,1943,1348,5078,1341,1252, 560, #  880
+3095,5079,3467,2870,5080,2054, 973, 886,2081, 143,4539,5081,5082, 157,3989, 496, #  896
+4224,  57, 840, 540,2039,4540,4541,3468,2118,1445, 970,2264,1748,1966,2082,4225, #  912
+3144,1234,1776,3284,2829,3695, 773,1206,2130,1066,2040,1326,3990,1738,1725,4226, #  928
+ 279,3145,  51,1544,2604, 423,1578,2131,2067, 173,4542,1880,5083,5084,1583, 264, #  944
+ 610,3696,4543,2444, 280, 154,5085,5086,5087,1739, 338,1282,3096, 693,2871,1411, #  960
+1074,3826,2445,5088,4544,5089,5090,1240, 952,2399,5091,2914,1538,2688, 685,1483, #  976
+4227,2475,1436, 953,4228,2055,4545, 671,2400,  79,4229,2446,3285, 608, 567,2689, #  992
+3469,4230,4231,1691, 393,1261,1792,2401,5092,4546,5093,5094,5095,5096,1383,1672, # 1008
+3827,3213,1464, 522,1119, 661,1150, 216, 675,4547,3991,1432,3574, 609,4548,2690, # 1024
+2402,5097,5098,5099,4232,3045,   0,5100,2476, 315, 231,2447, 301,3356,4549,2385, # 1040
+5101, 233,4233,3697,1819,4550,4551,5102,  96,1777,1315,2083,5103, 257,5104,1810, # 1056
+3698,2718,1139,1820,4234,2022,1124,2164,2791,1778,2659,5105,3097, 363,1655,3214, # 1072
+5106,2993,5107,5108,5109,3992,1567,3993, 718, 103,3215, 849,1443, 341,3357,2949, # 1088
+1484,5110,1712, 127,  67, 339,4235,2403, 679,1412, 821,5111,5112, 834, 738, 351, # 1104
+2994,2147, 846, 235,1497,1881, 418,1993,3828,2719, 186,1100,2148,2756,3575,1545, # 1120
+1355,2950,2872,1377, 583,3994,4236,2581,2995,5113,1298,3699,1078,2557,3700,2363, # 1136
+  78,3829,3830, 267,1289,2100,2002,1594,4237, 348, 369,1274,2197,2178,1838,4552, # 1152
+1821,2830,3701,2757,2288,2003,4553,2951,2758, 144,3358, 882,4554,3995,2759,3470, # 1168
+4555,2915,5114,4238,1726, 320,5115,3996,3046, 788,2996,5116,2831,1774,1327,2873, # 1184
+3997,2832,5117,1306,4556,2004,1700,3831,3576,2364,2660, 787,2023, 506, 824,3702, # 1200
+ 534, 323,4557,1044,3359,2024,1901, 946,3471,5118,1779,1500,1678,5119,1882,4558, # 1216
+ 165, 243,4559,3703,2528, 123, 683,4239, 764,4560,  36,3998,1793, 589,2916, 816, # 1232
+ 626,1667,3047,2237,1639,1555,1622,3832,3999,5120,4000,2874,1370,1228,1933, 891, # 1248
+2084,2917, 304,4240,5121, 292,2997,2720,3577, 691,2101,4241,1115,4561, 118, 662, # 1264
+5122, 611,1156, 854,2386,1316,2875,   2, 386, 515,2918,5123,5124,3286, 868,2238, # 1280
+1486, 855,2661, 785,2216,3048,5125,1040,3216,3578,5126,3146, 448,5127,1525,5128, # 1296
+2165,4562,5129,3833,5130,4242,2833,3579,3147, 503, 818,4001,3148,1568, 814, 676, # 1312
+1444, 306,1749,5131,3834,1416,1030, 197,1428, 805,2834,1501,4563,5132,5133,5134, # 1328
+1994,5135,4564,5136,5137,2198,  13,2792,3704,2998,3149,1229,1917,5138,3835,2132, # 1344
+5139,4243,4565,2404,3580,5140,2217,1511,1727,1120,5141,5142, 646,3836,2448, 307, # 1360
+5143,5144,1595,3217,5145,5146,5147,3705,1113,1356,4002,1465,2529,2530,5148, 519, # 1376
+5149, 128,2133,  92,2289,1980,5150,4003,1512, 342,3150,2199,5151,2793,2218,1981, # 1392
+3360,4244, 290,1656,1317, 789, 827,2365,5152,3837,4566, 562, 581,4004,5153, 401, # 1408
+4567,2252,  94,4568,5154,1399,2794,5155,1463,2025,4569,3218,1944,5156, 828,1105, # 1424
+4245,1262,1394,5157,4246, 605,4570,5158,1784,2876,5159,2835, 819,2102, 578,2200, # 1440
+2952,5160,1502, 436,3287,4247,3288,2836,4005,2919,3472,3473,5161,2721,2320,5162, # 1456
+5163,2337,2068,  23,4571, 193, 826,3838,2103, 699,1630,4248,3098, 390,1794,1064, # 1472
+3581,5164,1579,3099,3100,1400,5165,4249,1839,1640,2877,5166,4572,4573, 137,4250, # 1488
+ 598,3101,1967, 780, 104, 974,2953,5167, 278, 899, 253, 402, 572, 504, 493,1339, # 1504
+5168,4006,1275,4574,2582,2558,5169,3706,3049,3102,2253, 565,1334,2722, 863,  41, # 1520
+5170,5171,4575,5172,1657,2338,  19, 463,2760,4251, 606,5173,2999,3289,1087,2085, # 1536
+1323,2662,3000,5174,1631,1623,1750,4252,2691,5175,2878, 791,2723,2663,2339, 232, # 1552
+2421,5176,3001,1498,5177,2664,2630, 755,1366,3707,3290,3151,2026,1609, 119,1918, # 1568
+3474, 862,1026,4253,5178,4007,3839,4576,4008,4577,2265,1952,2477,5179,1125, 817, # 1584
+4254,4255,4009,1513,1766,2041,1487,4256,3050,3291,2837,3840,3152,5180,5181,1507, # 1600
+5182,2692, 733,  40,1632,1106,2879, 345,4257, 841,2531, 230,4578,3002,1847,3292, # 1616
+3475,5183,1263, 986,3476,5184, 735, 879, 254,1137, 857, 622,1300,1180,1388,1562, # 1632
+4010,4011,2954, 967,2761,2665,1349, 592,2134,1692,3361,3003,1995,4258,1679,4012, # 1648
+1902,2188,5185, 739,3708,2724,1296,1290,5186,4259,2201,2202,1922,1563,2605,2559, # 1664
+1871,2762,3004,5187, 435,5188, 343,1108, 596,  17,1751,4579,2239,3477,3709,5189, # 1680
+4580, 294,3582,2955,1693, 477, 979, 281,2042,3583, 643,2043,3710,2631,2795,2266, # 1696
+1031,2340,2135,2303,3584,4581, 367,1249,2560,5190,3585,5191,4582,1283,3362,2005, # 1712
+ 240,1762,3363,4583,4584, 836,1069,3153, 474,5192,2149,2532, 268,3586,5193,3219, # 1728
+1521,1284,5194,1658,1546,4260,5195,3587,3588,5196,4261,3364,2693,1685,4262, 961, # 1744
+1673,2632, 190,2006,2203,3841,4585,4586,5197, 570,2504,3711,1490,5198,4587,2633, # 1760
+3293,1957,4588, 584,1514, 396,1045,1945,5199,4589,1968,2449,5200,5201,4590,4013, # 1776
+ 619,5202,3154,3294, 215,2007,2796,2561,3220,4591,3221,4592, 763,4263,3842,4593, # 1792
+5203,5204,1958,1767,2956,3365,3712,1174, 452,1477,4594,3366,3155,5205,2838,1253, # 1808
+2387,2189,1091,2290,4264, 492,5206, 638,1169,1825,2136,1752,4014, 648, 926,1021, # 1824
+1324,4595, 520,4596, 997, 847,1007, 892,4597,3843,2267,1872,3713,2405,1785,4598, # 1840
+1953,2957,3103,3222,1728,4265,2044,3714,4599,2008,1701,3156,1551,  30,2268,4266, # 1856
+5207,2027,4600,3589,5208, 501,5209,4267, 594,3478,2166,1822,3590,3479,3591,3223, # 1872
+ 829,2839,4268,5210,1680,3157,1225,4269,5211,3295,4601,4270,3158,2341,5212,4602, # 1888
+4271,5213,4015,4016,5214,1848,2388,2606,3367,5215,4603, 374,4017, 652,4272,4273, # 1904
+ 375,1140, 798,5216,5217,5218,2366,4604,2269, 546,1659, 138,3051,2450,4605,5219, # 1920
+2254, 612,1849, 910, 796,3844,1740,1371, 825,3845,3846,5220,2920,2562,5221, 692, # 1936
+ 444,3052,2634, 801,4606,4274,5222,1491, 244,1053,3053,4275,4276, 340,5223,4018, # 1952
+1041,3005, 293,1168,  87,1357,5224,1539, 959,5225,2240, 721, 694,4277,3847, 219, # 1968
+1478, 644,1417,3368,2666,1413,1401,1335,1389,4019,5226,5227,3006,2367,3159,1826, # 1984
+ 730,1515, 184,2840,  66,4607,5228,1660,2958, 246,3369, 378,1457, 226,3480, 975, # 2000
+4020,2959,1264,3592, 674, 696,5229, 163,5230,1141,2422,2167, 713,3593,3370,4608, # 2016
+4021,5231,5232,1186,  15,5233,1079,1070,5234,1522,3224,3594, 276,1050,2725, 758, # 2032
+1126, 653,2960,3296,5235,2342, 889,3595,4022,3104,3007, 903,1250,4609,4023,3481, # 2048
+3596,1342,1681,1718, 766,3297, 286,  89,2961,3715,5236,1713,5237,2607,3371,3008, # 2064
+5238,2962,2219,3225,2880,5239,4610,2505,2533, 181, 387,1075,4024, 731,2190,3372, # 2080
+5240,3298, 310, 313,3482,2304, 770,4278,  54,3054, 189,4611,3105,3848,4025,5241, # 2096
+1230,1617,1850, 355,3597,4279,4612,3373, 111,4280,3716,1350,3160,3483,3055,4281, # 2112
+2150,3299,3598,5242,2797,4026,4027,3009, 722,2009,5243,1071, 247,1207,2343,2478, # 2128
+1378,4613,2010, 864,1437,1214,4614, 373,3849,1142,2220, 667,4615, 442,2763,2563, # 2144
+3850,4028,1969,4282,3300,1840, 837, 170,1107, 934,1336,1883,5244,5245,2119,4283, # 2160
+2841, 743,1569,5246,4616,4284, 582,2389,1418,3484,5247,1803,5248, 357,1395,1729, # 2176
+3717,3301,2423,1564,2241,5249,3106,3851,1633,4617,1114,2086,4285,1532,5250, 482, # 2192
+2451,4618,5251,5252,1492, 833,1466,5253,2726,3599,1641,2842,5254,1526,1272,3718, # 2208
+4286,1686,1795, 416,2564,1903,1954,1804,5255,3852,2798,3853,1159,2321,5256,2881, # 2224
+4619,1610,1584,3056,2424,2764, 443,3302,1163,3161,5257,5258,4029,5259,4287,2506, # 2240
+3057,4620,4030,3162,2104,1647,3600,2011,1873,4288,5260,4289, 431,3485,5261, 250, # 2256
+  97,  81,4290,5262,1648,1851,1558, 160, 848,5263, 866, 740,1694,5264,2204,2843, # 2272
+3226,4291,4621,3719,1687, 950,2479, 426, 469,3227,3720,3721,4031,5265,5266,1188, # 2288
+ 424,1996, 861,3601,4292,3854,2205,2694, 168,1235,3602,4293,5267,2087,1674,4622, # 2304
+3374,3303, 220,2565,1009,5268,3855, 670,3010, 332,1208, 717,5269,5270,3603,2452, # 2320
+4032,3375,5271, 513,5272,1209,2882,3376,3163,4623,1080,5273,5274,5275,5276,2534, # 2336
+3722,3604, 815,1587,4033,4034,5277,3605,3486,3856,1254,4624,1328,3058,1390,4035, # 2352
+1741,4036,3857,4037,5278, 236,3858,2453,3304,5279,5280,3723,3859,1273,3860,4625, # 2368
+5281, 308,5282,4626, 245,4627,1852,2480,1307,2583, 430, 715,2137,2454,5283, 270, # 2384
+ 199,2883,4038,5284,3606,2727,1753, 761,1754, 725,1661,1841,4628,3487,3724,5285, # 2400
+5286, 587,  14,3305, 227,2608, 326, 480,2270, 943,2765,3607, 291, 650,1884,5287, # 2416
+1702,1226, 102,1547,  62,3488, 904,4629,3489,1164,4294,5288,5289,1224,1548,2766, # 2432
+ 391, 498,1493,5290,1386,1419,5291,2056,1177,4630, 813, 880,1081,2368, 566,1145, # 2448
+4631,2291,1001,1035,2566,2609,2242, 394,1286,5292,5293,2069,5294,  86,1494,1730, # 2464
+4039, 491,1588, 745, 897,2963, 843,3377,4040,2767,2884,3306,1768, 998,2221,2070, # 2480
+ 397,1827,1195,1970,3725,3011,3378, 284,5295,3861,2507,2138,2120,1904,5296,4041, # 2496
+2151,4042,4295,1036,3490,1905, 114,2567,4296, 209,1527,5297,5298,2964,2844,2635, # 2512
+2390,2728,3164, 812,2568,5299,3307,5300,1559, 737,1885,3726,1210, 885,  28,2695, # 2528
+3608,3862,5301,4297,1004,1780,4632,5302, 346,1982,2222,2696,4633,3863,1742, 797, # 2544
+1642,4043,1934,1072,1384,2152, 896,4044,3308,3727,3228,2885,3609,5303,2569,1959, # 2560
+4634,2455,1786,5304,5305,5306,4045,4298,1005,1308,3728,4299,2729,4635,4636,1528, # 2576
+2610, 161,1178,4300,1983, 987,4637,1101,4301, 631,4046,1157,3229,2425,1343,1241, # 2592
+1016,2243,2570, 372, 877,2344,2508,1160, 555,1935, 911,4047,5307, 466,1170, 169, # 2608
+1051,2921,2697,3729,2481,3012,1182,2012,2571,1251,2636,5308, 992,2345,3491,1540, # 2624
+2730,1201,2071,2406,1997,2482,5309,4638, 528,1923,2191,1503,1874,1570,2369,3379, # 2640
+3309,5310, 557,1073,5311,1828,3492,2088,2271,3165,3059,3107, 767,3108,2799,4639, # 2656
+1006,4302,4640,2346,1267,2179,3730,3230, 778,4048,3231,2731,1597,2667,5312,4641, # 2672
+5313,3493,5314,5315,5316,3310,2698,1433,3311, 131,  95,1504,4049, 723,4303,3166, # 2688
+1842,3610,2768,2192,4050,2028,2105,3731,5317,3013,4051,1218,5318,3380,3232,4052, # 2704
+4304,2584, 248,1634,3864, 912,5319,2845,3732,3060,3865, 654,  53,5320,3014,5321, # 2720
+1688,4642, 777,3494,1032,4053,1425,5322, 191, 820,2121,2846, 971,4643, 931,3233, # 2736
+ 135, 664, 783,3866,1998, 772,2922,1936,4054,3867,4644,2923,3234, 282,2732, 640, # 2752
+1372,3495,1127, 922, 325,3381,5323,5324, 711,2045,5325,5326,4055,2223,2800,1937, # 2768
+4056,3382,2224,2255,3868,2305,5327,4645,3869,1258,3312,4057,3235,2139,2965,4058, # 2784
+4059,5328,2225, 258,3236,4646, 101,1227,5329,3313,1755,5330,1391,3314,5331,2924, # 2800
+2057, 893,5332,5333,5334,1402,4305,2347,5335,5336,3237,3611,5337,5338, 878,1325, # 2816
+1781,2801,4647, 259,1385,2585, 744,1183,2272,4648,5339,4060,2509,5340, 684,1024, # 2832
+4306,5341, 472,3612,3496,1165,3315,4061,4062, 322,2153, 881, 455,1695,1152,1340, # 2848
+ 660, 554,2154,4649,1058,4650,4307, 830,1065,3383,4063,4651,1924,5342,1703,1919, # 2864
+5343, 932,2273, 122,5344,4652, 947, 677,5345,3870,2637, 297,1906,1925,2274,4653, # 2880
+2322,3316,5346,5347,4308,5348,4309,  84,4310, 112, 989,5349, 547,1059,4064, 701, # 2896
+3613,1019,5350,4311,5351,3497, 942, 639, 457,2306,2456, 993,2966, 407, 851, 494, # 2912
+4654,3384, 927,5352,1237,5353,2426,3385, 573,4312, 680, 921,2925,1279,1875, 285, # 2928
+ 790,1448,1984, 719,2168,5354,5355,4655,4065,4066,1649,5356,1541, 563,5357,1077, # 2944
+5358,3386,3061,3498, 511,3015,4067,4068,3733,4069,1268,2572,3387,3238,4656,4657, # 2960
+5359, 535,1048,1276,1189,2926,2029,3167,1438,1373,2847,2967,1134,2013,5360,4313, # 2976
+1238,2586,3109,1259,5361, 700,5362,2968,3168,3734,4314,5363,4315,1146,1876,1907, # 2992
+4658,2611,4070, 781,2427, 132,1589, 203, 147, 273,2802,2407, 898,1787,2155,4071, # 3008
+4072,5364,3871,2803,5365,5366,4659,4660,5367,3239,5368,1635,3872, 965,5369,1805, # 3024
+2699,1516,3614,1121,1082,1329,3317,4073,1449,3873,  65,1128,2848,2927,2769,1590, # 3040
+3874,5370,5371,  12,2668,  45, 976,2587,3169,4661, 517,2535,1013,1037,3240,5372, # 3056
+3875,2849,5373,3876,5374,3499,5375,2612, 614,1999,2323,3877,3110,2733,2638,5376, # 3072
+2588,4316, 599,1269,5377,1811,3735,5378,2700,3111, 759,1060, 489,1806,3388,3318, # 3088
+1358,5379,5380,2391,1387,1215,2639,2256, 490,5381,5382,4317,1759,2392,2348,5383, # 3104
+4662,3878,1908,4074,2640,1807,3241,4663,3500,3319,2770,2349, 874,5384,5385,3501, # 3120
+3736,1859,  91,2928,3737,3062,3879,4664,5386,3170,4075,2669,5387,3502,1202,1403, # 3136
+3880,2969,2536,1517,2510,4665,3503,2511,5388,4666,5389,2701,1886,1495,1731,4076, # 3152
+2370,4667,5390,2030,5391,5392,4077,2702,1216, 237,2589,4318,2324,4078,3881,4668, # 3168
+4669,2703,3615,3504, 445,4670,5393,5394,5395,5396,2771,  61,4079,3738,1823,4080, # 3184
+5397, 687,2046, 935, 925, 405,2670, 703,1096,1860,2734,4671,4081,1877,1367,2704, # 3200
+3389, 918,2106,1782,2483, 334,3320,1611,1093,4672, 564,3171,3505,3739,3390, 945, # 3216
+2641,2058,4673,5398,1926, 872,4319,5399,3506,2705,3112, 349,4320,3740,4082,4674, # 3232
+3882,4321,3741,2156,4083,4675,4676,4322,4677,2408,2047, 782,4084, 400, 251,4323, # 3248
+1624,5400,5401, 277,3742, 299,1265, 476,1191,3883,2122,4324,4325,1109, 205,5402, # 3264
+2590,1000,2157,3616,1861,5403,5404,5405,4678,5406,4679,2573, 107,2484,2158,4085, # 3280
+3507,3172,5407,1533, 541,1301, 158, 753,4326,2886,3617,5408,1696, 370,1088,4327, # 3296
+4680,3618, 579, 327, 440, 162,2244, 269,1938,1374,3508, 968,3063,  56,1396,3113, # 3312
+2107,3321,3391,5409,1927,2159,4681,3016,5410,3619,5411,5412,3743,4682,2485,5413, # 3328
+2804,5414,1650,4683,5415,2613,5416,5417,4086,2671,3392,1149,3393,4087,3884,4088, # 3344
+5418,1076,  49,5419, 951,3242,3322,3323, 450,2850, 920,5420,1812,2805,2371,4328, # 3360
+1909,1138,2372,3885,3509,5421,3243,4684,1910,1147,1518,2428,4685,3886,5422,4686, # 3376
+2393,2614, 260,1796,3244,5423,5424,3887,3324, 708,5425,3620,1704,5426,3621,1351, # 3392
+1618,3394,3017,1887, 944,4329,3395,4330,3064,3396,4331,5427,3744, 422, 413,1714, # 3408
+3325, 500,2059,2350,4332,2486,5428,1344,1911, 954,5429,1668,5430,5431,4089,2409, # 3424
+4333,3622,3888,4334,5432,2307,1318,2512,3114, 133,3115,2887,4687, 629,  31,2851, # 3440
+2706,3889,4688, 850, 949,4689,4090,2970,1732,2089,4335,1496,1853,5433,4091, 620, # 3456
+3245, 981,1242,3745,3397,1619,3746,1643,3326,2140,2457,1971,1719,3510,2169,5434, # 3472
+3246,5435,5436,3398,1829,5437,1277,4690,1565,2048,5438,1636,3623,3116,5439, 869, # 3488
+2852, 655,3890,3891,3117,4092,3018,3892,1310,3624,4691,5440,5441,5442,1733, 558, # 3504
+4692,3747, 335,1549,3065,1756,4336,3748,1946,3511,1830,1291,1192, 470,2735,2108, # 3520
+2806, 913,1054,4093,5443,1027,5444,3066,4094,4693, 982,2672,3399,3173,3512,3247, # 3536
+3248,1947,2807,5445, 571,4694,5446,1831,5447,3625,2591,1523,2429,5448,2090, 984, # 3552
+4695,3749,1960,5449,3750, 852, 923,2808,3513,3751, 969,1519, 999,2049,2325,1705, # 3568
+5450,3118, 615,1662, 151, 597,4095,2410,2326,1049, 275,4696,3752,4337, 568,3753, # 3584
+3626,2487,4338,3754,5451,2430,2275, 409,3249,5452,1566,2888,3514,1002, 769,2853, # 3600
+ 194,2091,3174,3755,2226,3327,4339, 628,1505,5453,5454,1763,2180,3019,4096, 521, # 3616
+1161,2592,1788,2206,2411,4697,4097,1625,4340,4341, 412,  42,3119, 464,5455,2642, # 3632
+4698,3400,1760,1571,2889,3515,2537,1219,2207,3893,2643,2141,2373,4699,4700,3328, # 3648
+1651,3401,3627,5456,5457,3628,2488,3516,5458,3756,5459,5460,2276,2092, 460,5461, # 3664
+4701,5462,3020, 962, 588,3629, 289,3250,2644,1116,  52,5463,3067,1797,5464,5465, # 3680
+5466,1467,5467,1598,1143,3757,4342,1985,1734,1067,4702,1280,3402, 465,4703,1572, # 3696
+ 510,5468,1928,2245,1813,1644,3630,5469,4704,3758,5470,5471,2673,1573,1534,5472, # 3712
+5473, 536,1808,1761,3517,3894,3175,2645,5474,5475,5476,4705,3518,2929,1912,2809, # 3728
+5477,3329,1122, 377,3251,5478, 360,5479,5480,4343,1529, 551,5481,2060,3759,1769, # 3744
+2431,5482,2930,4344,3330,3120,2327,2109,2031,4706,1404, 136,1468,1479, 672,1171, # 3760
+3252,2308, 271,3176,5483,2772,5484,2050, 678,2736, 865,1948,4707,5485,2014,4098, # 3776
+2971,5486,2737,2227,1397,3068,3760,4708,4709,1735,2931,3403,3631,5487,3895, 509, # 3792
+2854,2458,2890,3896,5488,5489,3177,3178,4710,4345,2538,4711,2309,1166,1010, 552, # 3808
+ 681,1888,5490,5491,2972,2973,4099,1287,1596,1862,3179, 358, 453, 736, 175, 478, # 3824
+1117, 905,1167,1097,5492,1854,1530,5493,1706,5494,2181,3519,2292,3761,3520,3632, # 3840
+4346,2093,4347,5495,3404,1193,2489,4348,1458,2193,2208,1863,1889,1421,3331,2932, # 3856
+3069,2182,3521, 595,2123,5496,4100,5497,5498,4349,1707,2646, 223,3762,1359, 751, # 3872
+3121, 183,3522,5499,2810,3021, 419,2374, 633, 704,3897,2394, 241,5500,5501,5502, # 3888
+ 838,3022,3763,2277,2773,2459,3898,1939,2051,4101,1309,3122,2246,1181,5503,1136, # 3904
+2209,3899,2375,1446,4350,2310,4712,5504,5505,4351,1055,2615, 484,3764,5506,4102, # 3920
+ 625,4352,2278,3405,1499,4353,4103,5507,4104,4354,3253,2279,2280,3523,5508,5509, # 3936
+2774, 808,2616,3765,3406,4105,4355,3123,2539, 526,3407,3900,4356, 955,5510,1620, # 3952
+4357,2647,2432,5511,1429,3766,1669,1832, 994, 928,5512,3633,1260,5513,5514,5515, # 3968
+1949,2293, 741,2933,1626,4358,2738,2460, 867,1184, 362,3408,1392,5516,5517,4106, # 3984
+4359,1770,1736,3254,2934,4713,4714,1929,2707,1459,1158,5518,3070,3409,2891,1292, # 4000
+1930,2513,2855,3767,1986,1187,2072,2015,2617,4360,5519,2574,2514,2170,3768,2490, # 4016
+3332,5520,3769,4715,5521,5522, 666,1003,3023,1022,3634,4361,5523,4716,1814,2257, # 4032
+ 574,3901,1603, 295,1535, 705,3902,4362, 283, 858, 417,5524,5525,3255,4717,4718, # 4048
+3071,1220,1890,1046,2281,2461,4107,1393,1599, 689,2575, 388,4363,5526,2491, 802, # 4064
+5527,2811,3903,2061,1405,2258,5528,4719,3904,2110,1052,1345,3256,1585,5529, 809, # 4080
+5530,5531,5532, 575,2739,3524, 956,1552,1469,1144,2328,5533,2329,1560,2462,3635, # 4096
+3257,4108, 616,2210,4364,3180,2183,2294,5534,1833,5535,3525,4720,5536,1319,3770, # 4112
+3771,1211,3636,1023,3258,1293,2812,5537,5538,5539,3905, 607,2311,3906, 762,2892, # 4128
+1439,4365,1360,4721,1485,3072,5540,4722,1038,4366,1450,2062,2648,4367,1379,4723, # 4144
+2593,5541,5542,4368,1352,1414,2330,2935,1172,5543,5544,3907,3908,4724,1798,1451, # 4160
+5545,5546,5547,5548,2936,4109,4110,2492,2351, 411,4111,4112,3637,3333,3124,4725, # 4176
+1561,2674,1452,4113,1375,5549,5550,  47,2974, 316,5551,1406,1591,2937,3181,5552, # 4192
+1025,2142,3125,3182, 354,2740, 884,2228,4369,2412, 508,3772, 726,3638, 996,2433, # 4208
+3639, 729,5553, 392,2194,1453,4114,4726,3773,5554,5555,2463,3640,2618,1675,2813, # 4224
+ 919,2352,2975,2353,1270,4727,4115,  73,5556,5557, 647,5558,3259,2856,2259,1550, # 4240
+1346,3024,5559,1332, 883,3526,5560,5561,5562,5563,3334,2775,5564,1212, 831,1347, # 4256
+4370,4728,2331,3909,1864,3073, 720,3910,4729,4730,3911,5565,4371,5566,5567,4731, # 4272
+5568,5569,1799,4732,3774,2619,4733,3641,1645,2376,4734,5570,2938, 669,2211,2675, # 4288
+2434,5571,2893,5572,5573,1028,3260,5574,4372,2413,5575,2260,1353,5576,5577,4735, # 4304
+3183, 518,5578,4116,5579,4373,1961,5580,2143,4374,5581,5582,3025,2354,2355,3912, # 4320
+ 516,1834,1454,4117,2708,4375,4736,2229,2620,1972,1129,3642,5583,2776,5584,2976, # 4336
+1422, 577,1470,3026,1524,3410,5585,5586, 432,4376,3074,3527,5587,2594,1455,2515, # 4352
+2230,1973,1175,5588,1020,2741,4118,3528,4737,5589,2742,5590,1743,1361,3075,3529, # 4368
+2649,4119,4377,4738,2295, 895, 924,4378,2171, 331,2247,3076, 166,1627,3077,1098, # 4384
+5591,1232,2894,2231,3411,4739, 657, 403,1196,2377, 542,3775,3412,1600,4379,3530, # 4400
+5592,4740,2777,3261, 576, 530,1362,4741,4742,2540,2676,3776,4120,5593, 842,3913, # 4416
+5594,2814,2032,1014,4121, 213,2709,3413, 665, 621,4380,5595,3777,2939,2435,5596, # 4432
+2436,3335,3643,3414,4743,4381,2541,4382,4744,3644,1682,4383,3531,1380,5597, 724, # 4448
+2282, 600,1670,5598,1337,1233,4745,3126,2248,5599,1621,4746,5600, 651,4384,5601, # 4464
+1612,4385,2621,5602,2857,5603,2743,2312,3078,5604, 716,2464,3079, 174,1255,2710, # 4480
+4122,3645, 548,1320,1398, 728,4123,1574,5605,1891,1197,3080,4124,5606,3081,3082, # 4496
+3778,3646,3779, 747,5607, 635,4386,4747,5608,5609,5610,4387,5611,5612,4748,5613, # 4512
+3415,4749,2437, 451,5614,3780,2542,2073,4388,2744,4389,4125,5615,1764,4750,5616, # 4528
+4390, 350,4751,2283,2395,2493,5617,4391,4126,2249,1434,4127, 488,4752, 458,4392, # 4544
+4128,3781, 771,1330,2396,3914,2576,3184,2160,2414,1553,2677,3185,4393,5618,2494, # 4560
+2895,2622,1720,2711,4394,3416,4753,5619,2543,4395,5620,3262,4396,2778,5621,2016, # 4576
+2745,5622,1155,1017,3782,3915,5623,3336,2313, 201,1865,4397,1430,5624,4129,5625, # 4592
+5626,5627,5628,5629,4398,1604,5630, 414,1866, 371,2595,4754,4755,3532,2017,3127, # 4608
+4756,1708, 960,4399, 887, 389,2172,1536,1663,1721,5631,2232,4130,2356,2940,1580, # 4624
+5632,5633,1744,4757,2544,4758,4759,5634,4760,5635,2074,5636,4761,3647,3417,2896, # 4640
+4400,5637,4401,2650,3418,2815, 673,2712,2465, 709,3533,4131,3648,4402,5638,1148, # 4656
+ 502, 634,5639,5640,1204,4762,3649,1575,4763,2623,3783,5641,3784,3128, 948,3263, # 4672
+ 121,1745,3916,1110,5642,4403,3083,2516,3027,4132,3785,1151,1771,3917,1488,4133, # 4688
+1987,5643,2438,3534,5644,5645,2094,5646,4404,3918,1213,1407,2816, 531,2746,2545, # 4704
+3264,1011,1537,4764,2779,4405,3129,1061,5647,3786,3787,1867,2897,5648,2018, 120, # 4720
+4406,4407,2063,3650,3265,2314,3919,2678,3419,1955,4765,4134,5649,3535,1047,2713, # 4736
+1266,5650,1368,4766,2858, 649,3420,3920,2546,2747,1102,2859,2679,5651,5652,2000, # 4752
+5653,1111,3651,2977,5654,2495,3921,3652,2817,1855,3421,3788,5655,5656,3422,2415, # 4768
+2898,3337,3266,3653,5657,2577,5658,3654,2818,4135,1460, 856,5659,3655,5660,2899, # 4784
+2978,5661,2900,3922,5662,4408, 632,2517, 875,3923,1697,3924,2296,5663,5664,4767, # 4800
+3028,1239, 580,4768,4409,5665, 914, 936,2075,1190,4136,1039,2124,5666,5667,5668, # 4816
+5669,3423,1473,5670,1354,4410,3925,4769,2173,3084,4137, 915,3338,4411,4412,3339, # 4832
+1605,1835,5671,2748, 398,3656,4413,3926,4138, 328,1913,2860,4139,3927,1331,4414, # 4848
+3029, 937,4415,5672,3657,4140,4141,3424,2161,4770,3425, 524, 742, 538,3085,1012, # 4864
+5673,5674,3928,2466,5675, 658,1103, 225,3929,5676,5677,4771,5678,4772,5679,3267, # 4880
+1243,5680,4142, 963,2250,4773,5681,2714,3658,3186,5682,5683,2596,2332,5684,4774, # 4896
+5685,5686,5687,3536, 957,3426,2547,2033,1931,2941,2467, 870,2019,3659,1746,2780, # 4912
+2781,2439,2468,5688,3930,5689,3789,3130,3790,3537,3427,3791,5690,1179,3086,5691, # 4928
+3187,2378,4416,3792,2548,3188,3131,2749,4143,5692,3428,1556,2549,2297, 977,2901, # 4944
+2034,4144,1205,3429,5693,1765,3430,3189,2125,1271, 714,1689,4775,3538,5694,2333, # 4960
+3931, 533,4417,3660,2184, 617,5695,2469,3340,3539,2315,5696,5697,3190,5698,5699, # 4976
+3932,1988, 618, 427,2651,3540,3431,5700,5701,1244,1690,5702,2819,4418,4776,5703, # 4992
+3541,4777,5704,2284,1576, 473,3661,4419,3432, 972,5705,3662,5706,3087,5707,5708, # 5008
+4778,4779,5709,3793,4145,4146,5710, 153,4780, 356,5711,1892,2902,4420,2144, 408, # 5024
+ 803,2357,5712,3933,5713,4421,1646,2578,2518,4781,4782,3934,5714,3935,4422,5715, # 5040
+2416,3433, 752,5716,5717,1962,3341,2979,5718, 746,3030,2470,4783,4423,3794, 698, # 5056
+4784,1893,4424,3663,2550,4785,3664,3936,5719,3191,3434,5720,1824,1302,4147,2715, # 5072
+3937,1974,4425,5721,4426,3192, 823,1303,1288,1236,2861,3542,4148,3435, 774,3938, # 5088
+5722,1581,4786,1304,2862,3939,4787,5723,2440,2162,1083,3268,4427,4149,4428, 344, # 5104
+1173, 288,2316, 454,1683,5724,5725,1461,4788,4150,2597,5726,5727,4789, 985, 894, # 5120
+5728,3436,3193,5729,1914,2942,3795,1989,5730,2111,1975,5731,4151,5732,2579,1194, # 5136
+ 425,5733,4790,3194,1245,3796,4429,5734,5735,2863,5736, 636,4791,1856,3940, 760, # 5152
+1800,5737,4430,2212,1508,4792,4152,1894,1684,2298,5738,5739,4793,4431,4432,2213, # 5168
+ 479,5740,5741, 832,5742,4153,2496,5743,2980,2497,3797, 990,3132, 627,1815,2652, # 5184
+4433,1582,4434,2126,2112,3543,4794,5744, 799,4435,3195,5745,4795,2113,1737,3031, # 5200
+1018, 543, 754,4436,3342,1676,4796,4797,4154,4798,1489,5746,3544,5747,2624,2903, # 5216
+4155,5748,5749,2981,5750,5751,5752,5753,3196,4799,4800,2185,1722,5754,3269,3270, # 5232
+1843,3665,1715, 481, 365,1976,1857,5755,5756,1963,2498,4801,5757,2127,3666,3271, # 5248
+ 433,1895,2064,2076,5758, 602,2750,5759,5760,5761,5762,5763,3032,1628,3437,5764, # 5264
+3197,4802,4156,2904,4803,2519,5765,2551,2782,5766,5767,5768,3343,4804,2905,5769, # 5280
+4805,5770,2864,4806,4807,1221,2982,4157,2520,5771,5772,5773,1868,1990,5774,5775, # 5296
+5776,1896,5777,5778,4808,1897,4158, 318,5779,2095,4159,4437,5780,5781, 485,5782, # 5312
+ 938,3941, 553,2680, 116,5783,3942,3667,5784,3545,2681,2783,3438,3344,2820,5785, # 5328
+3668,2943,4160,1747,2944,2983,5786,5787, 207,5788,4809,5789,4810,2521,5790,3033, # 5344
+ 890,3669,3943,5791,1878,3798,3439,5792,2186,2358,3440,1652,5793,5794,5795, 941, # 5360
+2299, 208,3546,4161,2020, 330,4438,3944,2906,2499,3799,4439,4811,5796,5797,5798, # 5376
+)
+# fmt: on
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/big5prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/big5prober.py
new file mode 100644
index 0000000..e4dfa7a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/big5prober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import Big5DistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import BIG5_SM_MODEL
+
+
+class Big5Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(BIG5_SM_MODEL)
+        self.distribution_analyzer = Big5DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "Big5"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/chardistribution.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/chardistribution.py
new file mode 100644
index 0000000..27b4a29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/chardistribution.py
@@ -0,0 +1,259 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .big5freq import (
+    BIG5_CHAR_TO_FREQ_ORDER,
+    BIG5_TABLE_SIZE,
+    BIG5_TYPICAL_DISTRIBUTION_RATIO,
+)
+from .euckrfreq import (
+    EUCKR_CHAR_TO_FREQ_ORDER,
+    EUCKR_TABLE_SIZE,
+    EUCKR_TYPICAL_DISTRIBUTION_RATIO,
+)
+from .euctwfreq import (
+    EUCTW_CHAR_TO_FREQ_ORDER,
+    EUCTW_TABLE_SIZE,
+    EUCTW_TYPICAL_DISTRIBUTION_RATIO,
+)
+from .gb2312freq import (
+    GB2312_CHAR_TO_FREQ_ORDER,
+    GB2312_TABLE_SIZE,
+    GB2312_TYPICAL_DISTRIBUTION_RATIO,
+)
+from .jisfreq import (
+    JIS_CHAR_TO_FREQ_ORDER,
+    JIS_TABLE_SIZE,
+    JIS_TYPICAL_DISTRIBUTION_RATIO,
+)
+from .johabfreq import JOHAB_TO_EUCKR_ORDER_TABLE
+
+
+class CharDistributionAnalysis:
+    ENOUGH_DATA_THRESHOLD = 1024
+    SURE_YES = 0.99
+    SURE_NO = 0.01
+    MINIMUM_DATA_THRESHOLD = 3
+
+    def __init__(self):
+        # Mapping table to get frequency order from char order (get from
+        # GetOrder())
+        self._char_to_freq_order = tuple()
+        self._table_size = None  # Size of above table
+        # This is a constant value which varies from language to language,
+        # used in calculating confidence.  See
+        # http://www.mozilla.org/projects/intl/UniversalCharsetDetection.html
+        # for further detail.
+        self.typical_distribution_ratio = None
+        self._done = None
+        self._total_chars = None
+        self._freq_chars = None
+        self.reset()
+
+    def reset(self):
+        """reset analyser, clear any state"""
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+        self._total_chars = 0  # Total characters encountered
+        # The number of characters whose frequency order is less than 512
+        self._freq_chars = 0
+
+    def feed(self, char, char_len):
+        """feed a character with known length"""
+        if char_len == 2:
+            # we only care about 2-bytes character in our distribution analysis
+            order = self.get_order(char)
+        else:
+            order = -1
+        if order >= 0:
+            self._total_chars += 1
+            # order is valid
+            if order < self._table_size:
+                if 512 > self._char_to_freq_order[order]:
+                    self._freq_chars += 1
+
+    def get_confidence(self):
+        """return confidence based on existing data"""
+        # if we didn't receive any character in our consideration range,
+        # return negative answer
+        if self._total_chars <= 0 or self._freq_chars <= self.MINIMUM_DATA_THRESHOLD:
+            return self.SURE_NO
+
+        if self._total_chars != self._freq_chars:
+            r = self._freq_chars / (
+                (self._total_chars - self._freq_chars) * self.typical_distribution_ratio
+            )
+            if r < self.SURE_YES:
+                return r
+
+        # normalize confidence (we don't want to be 100% sure)
+        return self.SURE_YES
+
+    def got_enough_data(self):
+        # It is not necessary to receive all data to draw conclusion.
+        # For charset detection, certain amount of data is enough
+        return self._total_chars > self.ENOUGH_DATA_THRESHOLD
+
+    def get_order(self, _):
+        # We do not handle characters based on the original encoding string,
+        # but convert this encoding string to a number, here called order.
+        # This allows multiple encodings of a language to share one frequency
+        # table.
+        return -1
+
+
+class EUCTWDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = EUCTW_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCTW_TABLE_SIZE
+        self.typical_distribution_ratio = EUCTW_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-TW encoding, we are interested
+        #   first  byte range: 0xc4 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xC4:
+            return 94 * (first_char - 0xC4) + byte_str[1] - 0xA1
+        return -1
+
+
+class EUCKRDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCKR_TABLE_SIZE
+        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-KR encoding, we are interested
+        #   first  byte range: 0xb0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char = byte_str[0]
+        if first_char >= 0xB0:
+            return 94 * (first_char - 0xB0) + byte_str[1] - 0xA1
+        return -1
+
+
+class JOHABDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = EUCKR_CHAR_TO_FREQ_ORDER
+        self._table_size = EUCKR_TABLE_SIZE
+        self.typical_distribution_ratio = EUCKR_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        first_char = byte_str[0]
+        if 0x88 <= first_char < 0xD4:
+            code = first_char * 256 + byte_str[1]
+            return JOHAB_TO_EUCKR_ORDER_TABLE.get(code, -1)
+        return -1
+
+
+class GB2312DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = GB2312_CHAR_TO_FREQ_ORDER
+        self._table_size = GB2312_TABLE_SIZE
+        self.typical_distribution_ratio = GB2312_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for GB2312 encoding, we are interested
+        #  first  byte range: 0xb0 -- 0xfe
+        #  second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if (first_char >= 0xB0) and (second_char >= 0xA1):
+            return 94 * (first_char - 0xB0) + second_char - 0xA1
+        return -1
+
+
+class Big5DistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = BIG5_CHAR_TO_FREQ_ORDER
+        self._table_size = BIG5_TABLE_SIZE
+        self.typical_distribution_ratio = BIG5_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for big5 encoding, we are interested
+        #   first  byte range: 0xa4 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e , 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if first_char >= 0xA4:
+            if second_char >= 0xA1:
+                return 157 * (first_char - 0xA4) + second_char - 0xA1 + 63
+            return 157 * (first_char - 0xA4) + second_char - 0x40
+        return -1
+
+
+class SJISDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for sjis encoding, we are interested
+        #   first  byte range: 0x81 -- 0x9f , 0xe0 -- 0xfe
+        #   second byte range: 0x40 -- 0x7e,  0x81 -- oxfe
+        # no validation needed here. State machine has done that
+        first_char, second_char = byte_str[0], byte_str[1]
+        if 0x81 <= first_char <= 0x9F:
+            order = 188 * (first_char - 0x81)
+        elif 0xE0 <= first_char <= 0xEF:
+            order = 188 * (first_char - 0xE0 + 31)
+        else:
+            return -1
+        order = order + second_char - 0x40
+        if second_char > 0x7F:
+            order = -1
+        return order
+
+
+class EUCJPDistributionAnalysis(CharDistributionAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._char_to_freq_order = JIS_CHAR_TO_FREQ_ORDER
+        self._table_size = JIS_TABLE_SIZE
+        self.typical_distribution_ratio = JIS_TYPICAL_DISTRIBUTION_RATIO
+
+    def get_order(self, byte_str):
+        # for euc-JP encoding, we are interested
+        #   first  byte range: 0xa0 -- 0xfe
+        #   second byte range: 0xa1 -- 0xfe
+        # no validation needed here. State machine has done that
+        char = byte_str[0]
+        if char >= 0xA0:
+            return 94 * (char - 0xA1) + byte_str[1] - 0xA1
+        return -1
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetgroupprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetgroupprober.py
new file mode 100644
index 0000000..778ff33
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetgroupprober.py
@@ -0,0 +1,109 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+
+class CharSetGroupProber(CharSetProber):
+    def __init__(self, lang_filter=None):
+        super().__init__(lang_filter=lang_filter)
+        self._active_num = 0
+        self.probers = []
+        self._best_guess_prober = None
+
+    def reset(self):
+        super().reset()
+        self._active_num = 0
+        for prober in self.probers:
+            if prober:
+                prober.reset()
+                prober.active = True
+                self._active_num += 1
+        self._best_guess_prober = None
+
+    @property
+    def charset_name(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.charset_name
+
+    @property
+    def language(self):
+        if not self._best_guess_prober:
+            self.get_confidence()
+            if not self._best_guess_prober:
+                return None
+        return self._best_guess_prober.language
+
+    def feed(self, byte_str):
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                continue
+            state = prober.feed(byte_str)
+            if not state:
+                continue
+            if state == ProbingState.FOUND_IT:
+                self._best_guess_prober = prober
+                self._state = ProbingState.FOUND_IT
+                return self.state
+            if state == ProbingState.NOT_ME:
+                prober.active = False
+                self._active_num -= 1
+                if self._active_num <= 0:
+                    self._state = ProbingState.NOT_ME
+                    return self.state
+        return self.state
+
+    def get_confidence(self):
+        state = self.state
+        if state == ProbingState.FOUND_IT:
+            return 0.99
+        if state == ProbingState.NOT_ME:
+            return 0.01
+        best_conf = 0.0
+        self._best_guess_prober = None
+        for prober in self.probers:
+            if not prober:
+                continue
+            if not prober.active:
+                self.logger.debug("%s not active", prober.charset_name)
+                continue
+            conf = prober.get_confidence()
+            self.logger.debug(
+                "%s %s confidence = %s", prober.charset_name, prober.language, conf
+            )
+            if best_conf < conf:
+                best_conf = conf
+                self._best_guess_prober = prober
+        if not self._best_guess_prober:
+            return 0.0
+        return best_conf
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetprober.py
new file mode 100644
index 0000000..9f1afd9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/charsetprober.py
@@ -0,0 +1,138 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+import re
+
+from .enums import ProbingState
+
+INTERNATIONAL_WORDS_PATTERN = re.compile(
+    b"[a-zA-Z]*[\x80-\xFF]+[a-zA-Z]*[^a-zA-Z\x80-\xFF]?"
+)
+
+
+class CharSetProber:
+
+    SHORTCUT_THRESHOLD = 0.95
+
+    def __init__(self, lang_filter=None):
+        self._state = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+
+    def reset(self):
+        self._state = ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        return None
+
+    def feed(self, byte_str):
+        raise NotImplementedError
+
+    @property
+    def state(self):
+        return self._state
+
+    def get_confidence(self):
+        return 0.0
+
+    @staticmethod
+    def filter_high_byte_only(buf):
+        buf = re.sub(b"([\x00-\x7F])+", b" ", buf)
+        return buf
+
+    @staticmethod
+    def filter_international_words(buf):
+        """
+        We define three types of bytes:
+        alphabet: english alphabets [a-zA-Z]
+        international: international characters [\x80-\xFF]
+        marker: everything else [^a-zA-Z\x80-\xFF]
+        The input buffer can be thought to contain a series of words delimited
+        by markers. This function works to filter all words that contain at
+        least one international character. All contiguous sequences of markers
+        are replaced by a single space ascii character.
+        This filter applies to all scripts which do not use English characters.
+        """
+        filtered = bytearray()
+
+        # This regex expression filters out only words that have at-least one
+        # international character. The word may include one marker character at
+        # the end.
+        words = INTERNATIONAL_WORDS_PATTERN.findall(buf)
+
+        for word in words:
+            filtered.extend(word[:-1])
+
+            # If the last character in the word is a marker, replace it with a
+            # space as markers shouldn't affect our analysis (they are used
+            # similarly across all languages and may thus have similar
+            # frequencies).
+            last_char = word[-1:]
+            if not last_char.isalpha() and last_char < b"\x80":
+                last_char = b" "
+            filtered.extend(last_char)
+
+        return filtered
+
+    @staticmethod
+    def remove_xml_tags(buf):
+        """
+        Returns a copy of ``buf`` that retains only the sequences of English
+        alphabet and high byte characters that are not between <> characters.
+        This filter can be applied to all scripts which contain both English
+        characters and extended ASCII characters, but is currently only used by
+        ``Latin1Prober``.
+        """
+        filtered = bytearray()
+        in_tag = False
+        prev = 0
+        buf = memoryview(buf).cast("c")
+
+        for curr, buf_char in enumerate(buf):
+            # Check if we're coming out of or entering an XML tag
+            if buf_char == b">":
+                prev = curr + 1
+                in_tag = False
+            elif buf_char == b"<":
+                if curr > prev and not in_tag:
+                    # Keep everything after last non-extended-ASCII,
+                    # non-alphabetic character
+                    filtered.extend(buf[prev:curr])
+                    # Output a space to delimit stretch we kept
+                    filtered.extend(b" ")
+                in_tag = True
+
+        # If we're not in a tag...
+        if not in_tag:
+            # Keep everything after last non-extended-ASCII, non-alphabetic
+            # character
+            filtered.extend(buf[prev:])
+
+        return filtered
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..cb88808
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-39.pyc
new file mode 100644
index 0000000..e21b5e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/__pycache__/chardetect.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/chardetect.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/chardetect.py
new file mode 100644
index 0000000..7926fa3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cli/chardetect.py
@@ -0,0 +1,86 @@
+"""
+Script which takes one or more file paths and reports on their detected
+encodings
+
+Example::
+
+    % chardetect somefile someotherfile
+    somefile: windows-1252 with confidence 0.5
+    someotherfile: ascii with confidence 1.0
+
+If no paths are provided, it takes its input from stdin.
+
+"""
+
+
+import argparse
+import sys
+
+from .. import __version__
+from ..universaldetector import UniversalDetector
+
+
+def description_of(lines, name="stdin"):
+    """
+    Return a string describing the probable encoding of a file or
+    list of strings.
+
+    :param lines: The lines to get the encoding of.
+    :type lines: Iterable of bytes
+    :param name: Name of file or collection of lines
+    :type name: str
+    """
+    u = UniversalDetector()
+    for line in lines:
+        line = bytearray(line)
+        u.feed(line)
+        # shortcut out of the loop to save reading further - particularly useful if we read a BOM.
+        if u.done:
+            break
+    u.close()
+    result = u.result
+    if result["encoding"]:
+        return f'{name}: {result["encoding"]} with confidence {result["confidence"]}'
+    return f"{name}: no result"
+
+
+def main(argv=None):
+    """
+    Handles command line arguments and gets things started.
+
+    :param argv: List of arguments, as if specified on the command-line.
+                 If None, ``sys.argv[1:]`` is used instead.
+    :type argv: list of str
+    """
+    # Get command line arguments
+    parser = argparse.ArgumentParser(
+        description="Takes one or more file paths and reports their detected \
+                     encodings"
+    )
+    parser.add_argument(
+        "input",
+        help="File whose encoding we would like to determine. \
+                              (default: stdin)",
+        type=argparse.FileType("rb"),
+        nargs="*",
+        default=[sys.stdin.buffer],
+    )
+    parser.add_argument(
+        "--version", action="version", version=f"%(prog)s {__version__}"
+    )
+    args = parser.parse_args(argv)
+
+    for f in args.input:
+        if f.isatty():
+            print(
+                "You are running chardetect interactively. Press "
+                "CTRL-D twice at the start of a blank line to signal the "
+                "end of your input. If you want help, run chardetect "
+                "--help\n",
+                file=sys.stderr,
+            )
+        print(description_of(f, f.name))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/codingstatemachine.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/codingstatemachine.py
new file mode 100644
index 0000000..d3e3e82
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/codingstatemachine.py
@@ -0,0 +1,88 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+import logging
+
+from .enums import MachineState
+
+
+class CodingStateMachine:
+    """
+    A state machine to verify a byte sequence for a particular encoding. For
+    each byte the detector receives, it will feed that byte to every active
+    state machine available, one byte at a time. The state machine changes its
+    state based on its previous state and the byte it receives. There are 3
+    states in a state machine that are of interest to an auto-detector:
+
+    START state: This is the state to start with, or a legal byte sequence
+                 (i.e. a valid code point) for character has been identified.
+
+    ME state:  This indicates that the state machine identified a byte sequence
+               that is specific to the charset it is designed for and that
+               there is no other possible encoding which can contain this byte
+               sequence. This will to lead to an immediate positive answer for
+               the detector.
+
+    ERROR state: This indicates the state machine identified an illegal byte
+                 sequence for that encoding. This will lead to an immediate
+                 negative answer for this encoding. Detector will exclude this
+                 encoding from consideration from here on.
+    """
+
+    def __init__(self, sm):
+        self._model = sm
+        self._curr_byte_pos = 0
+        self._curr_char_len = 0
+        self._curr_state = None
+        self.logger = logging.getLogger(__name__)
+        self.reset()
+
+    def reset(self):
+        self._curr_state = MachineState.START
+
+    def next_state(self, c):
+        # for each byte we get its class
+        # if it is first byte, we also get byte length
+        byte_class = self._model["class_table"][c]
+        if self._curr_state == MachineState.START:
+            self._curr_byte_pos = 0
+            self._curr_char_len = self._model["char_len_table"][byte_class]
+        # from byte's class and state_table, we get its next state
+        curr_state = self._curr_state * self._model["class_factor"] + byte_class
+        self._curr_state = self._model["state_table"][curr_state]
+        self._curr_byte_pos += 1
+        return self._curr_state
+
+    def get_current_charlen(self):
+        return self._curr_char_len
+
+    def get_coding_state_machine(self):
+        return self._model["name"]
+
+    @property
+    def language(self):
+        return self._model["language"]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cp949prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cp949prober.py
new file mode 100644
index 0000000..28a1f3d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/cp949prober.py
@@ -0,0 +1,49 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCKRDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import CP949_SM_MODEL
+
+
+class CP949Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(CP949_SM_MODEL)
+        # NOTE: CP949 is a superset of EUC-KR, so the distribution should be
+        #       not different.
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "CP949"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/enums.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/enums.py
new file mode 100644
index 0000000..32a77e7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/enums.py
@@ -0,0 +1,82 @@
+"""
+All of the Enums that are used throughout the chardet package.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+
+class InputState:
+    """
+    This enum represents the different states a universal detector can be in.
+    """
+
+    PURE_ASCII = 0
+    ESC_ASCII = 1
+    HIGH_BYTE = 2
+
+
+class LanguageFilter:
+    """
+    This enum represents the different language filters we can apply to a
+    ``UniversalDetector``.
+    """
+
+    CHINESE_SIMPLIFIED = 0x01
+    CHINESE_TRADITIONAL = 0x02
+    JAPANESE = 0x04
+    KOREAN = 0x08
+    NON_CJK = 0x10
+    ALL = 0x1F
+    CHINESE = CHINESE_SIMPLIFIED | CHINESE_TRADITIONAL
+    CJK = CHINESE | JAPANESE | KOREAN
+
+
+class ProbingState:
+    """
+    This enum represents the different states a prober can be in.
+    """
+
+    DETECTING = 0
+    FOUND_IT = 1
+    NOT_ME = 2
+
+
+class MachineState:
+    """
+    This enum represents the different states a state machine can be in.
+    """
+
+    START = 0
+    ERROR = 1
+    ITS_ME = 2
+
+
+class SequenceLikelihood:
+    """
+    This enum represents the likelihood of a character following the previous one.
+    """
+
+    NEGATIVE = 0
+    UNLIKELY = 1
+    LIKELY = 2
+    POSITIVE = 3
+
+    @classmethod
+    def get_num_categories(cls):
+        """:returns: The number of likelihood categories in the enum."""
+        return 4
+
+
+class CharacterCategory:
+    """
+    This enum represents the different categories language models for
+    ``SingleByteCharsetProber`` put characters into.
+
+    Anything less than CONTROL is considered a letter.
+    """
+
+    UNDEFINED = 255
+    LINE_BREAK = 254
+    SYMBOL = 253
+    DIGIT = 252
+    CONTROL = 251
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escprober.py
new file mode 100644
index 0000000..d992611
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escprober.py
@@ -0,0 +1,102 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .codingstatemachine import CodingStateMachine
+from .enums import LanguageFilter, MachineState, ProbingState
+from .escsm import (
+    HZ_SM_MODEL,
+    ISO2022CN_SM_MODEL,
+    ISO2022JP_SM_MODEL,
+    ISO2022KR_SM_MODEL,
+)
+
+
+class EscCharSetProber(CharSetProber):
+    """
+    This CharSetProber uses a "code scheme" approach for detecting encodings,
+    whereby easily recognizable escape or shift sequences are relied on to
+    identify these encodings.
+    """
+
+    def __init__(self, lang_filter=None):
+        super().__init__(lang_filter=lang_filter)
+        self.coding_sm = []
+        if self.lang_filter & LanguageFilter.CHINESE_SIMPLIFIED:
+            self.coding_sm.append(CodingStateMachine(HZ_SM_MODEL))
+            self.coding_sm.append(CodingStateMachine(ISO2022CN_SM_MODEL))
+        if self.lang_filter & LanguageFilter.JAPANESE:
+            self.coding_sm.append(CodingStateMachine(ISO2022JP_SM_MODEL))
+        if self.lang_filter & LanguageFilter.KOREAN:
+            self.coding_sm.append(CodingStateMachine(ISO2022KR_SM_MODEL))
+        self.active_sm_count = None
+        self._detected_charset = None
+        self._detected_language = None
+        self._state = None
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        for coding_sm in self.coding_sm:
+            if not coding_sm:
+                continue
+            coding_sm.active = True
+            coding_sm.reset()
+        self.active_sm_count = len(self.coding_sm)
+        self._detected_charset = None
+        self._detected_language = None
+
+    @property
+    def charset_name(self):
+        return self._detected_charset
+
+    @property
+    def language(self):
+        return self._detected_language
+
+    def get_confidence(self):
+        return 0.99 if self._detected_charset else 0.00
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            for coding_sm in self.coding_sm:
+                if not coding_sm or not coding_sm.active:
+                    continue
+                coding_state = coding_sm.next_state(c)
+                if coding_state == MachineState.ERROR:
+                    coding_sm.active = False
+                    self.active_sm_count -= 1
+                    if self.active_sm_count <= 0:
+                        self._state = ProbingState.NOT_ME
+                        return self.state
+                elif coding_state == MachineState.ITS_ME:
+                    self._state = ProbingState.FOUND_IT
+                    self._detected_charset = coding_sm.get_coding_state_machine()
+                    self._detected_language = coding_sm.language
+                    return self.state
+
+        return self.state
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escsm.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escsm.py
new file mode 100644
index 0000000..3aa0f4d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/escsm.py
@@ -0,0 +1,260 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License,  or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not,  write to the Free Software
+# Foundation,  Inc.,  51 Franklin St,  Fifth Floor,  Boston,  MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+# fmt: off
+HZ_CLS = (
+    1, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 0, 0, 0, 0, 0, 0,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 1, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 20 - 27
+    0, 0, 0, 0, 0, 0, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 40 - 47
+    0, 0, 0, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 4, 0, 5, 2, 0,  # 78 - 7f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 80 - 87
+    1, 1, 1, 1, 1, 1, 1, 1,  # 88 - 8f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 90 - 97
+    1, 1, 1, 1, 1, 1, 1, 1,  # 98 - 9f
+    1, 1, 1, 1, 1, 1, 1, 1,  # a0 - a7
+    1, 1, 1, 1, 1, 1, 1, 1,  # a8 - af
+    1, 1, 1, 1, 1, 1, 1, 1,  # b0 - b7
+    1, 1, 1, 1, 1, 1, 1, 1,  # b8 - bf
+    1, 1, 1, 1, 1, 1, 1, 1,  # c0 - c7
+    1, 1, 1, 1, 1, 1, 1, 1,  # c8 - cf
+    1, 1, 1, 1, 1, 1, 1, 1,  # d0 - d7
+    1, 1, 1, 1, 1, 1, 1, 1,  # d8 - df
+    1, 1, 1, 1, 1, 1, 1, 1,  # e0 - e7
+    1, 1, 1, 1, 1, 1, 1, 1,  # e8 - ef
+    1, 1, 1, 1, 1, 1, 1, 1,  # f0 - f7
+    1, 1, 1, 1, 1, 1, 1, 1,  # f8 - ff
+)
+
+HZ_ST = (
+MachineState.START, MachineState.ERROR,      3, MachineState.START, MachineState.START, MachineState.START, MachineState.ERROR, MachineState.ERROR, # 00-07
+MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, # 08-0f
+MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.START, MachineState.START,      4, MachineState.ERROR, # 10-17
+     5, MachineState.ERROR,      6, MachineState.ERROR,      5,      5,      4, MachineState.ERROR, # 18-1f
+     4, MachineState.ERROR,      4,      4,      4, MachineState.ERROR,      4, MachineState.ERROR, # 20-27
+     4, MachineState.ITS_ME, MachineState.START, MachineState.START, MachineState.START, MachineState.START, MachineState.START, MachineState.START, # 28-2f
+)
+# fmt: on
+
+HZ_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+HZ_SM_MODEL = {
+    "class_table": HZ_CLS,
+    "class_factor": 6,
+    "state_table": HZ_ST,
+    "char_len_table": HZ_CHAR_LEN_TABLE,
+    "name": "HZ-GB-2312",
+    "language": "Chinese",
+}
+
+# fmt: off
+ISO2022CN_CLS = (
+    2, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 0, 0, 0, 0, 0, 0,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 1, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 20 - 27
+    0, 3, 0, 0, 0, 0, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    0, 0, 0, 4, 0, 0, 0, 0,  # 40 - 47
+    0, 0, 0, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 0, 0, 0, 0, 0,  # 78 - 7f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 80 - 87
+    2, 2, 2, 2, 2, 2, 2, 2,  # 88 - 8f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 90 - 97
+    2, 2, 2, 2, 2, 2, 2, 2,  # 98 - 9f
+    2, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 2, 2, 2,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 2, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    2, 2, 2, 2, 2, 2, 2, 2,  # e0 - e7
+    2, 2, 2, 2, 2, 2, 2, 2,  # e8 - ef
+    2, 2, 2, 2, 2, 2, 2, 2,  # f0 - f7
+    2, 2, 2, 2, 2, 2, 2, 2,  # f8 - ff
+)
+
+ISO2022CN_ST = (
+    MachineState.START,      3, MachineState.ERROR, MachineState.START, MachineState.START, MachineState.START, MachineState.START, MachineState.START, # 00-07
+    MachineState.START, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 08-0f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, # 10-17
+    MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR,      4, MachineState.ERROR, # 18-1f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 20-27
+        5,      6, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 28-2f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 30-37
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, MachineState.START, # 38-3f
+)
+# fmt: on
+
+ISO2022CN_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022CN_SM_MODEL = {
+    "class_table": ISO2022CN_CLS,
+    "class_factor": 9,
+    "state_table": ISO2022CN_ST,
+    "char_len_table": ISO2022CN_CHAR_LEN_TABLE,
+    "name": "ISO-2022-CN",
+    "language": "Chinese",
+}
+
+# fmt: off
+ISO2022JP_CLS = (
+    2, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 0, 0, 0, 0, 2, 2,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 1, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 7, 0, 0, 0,  # 20 - 27
+    3, 0, 0, 0, 0, 0, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    6, 0, 4, 0, 8, 0, 0, 0,  # 40 - 47
+    0, 9, 5, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 0, 0, 0, 0, 0,  # 78 - 7f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 80 - 87
+    2, 2, 2, 2, 2, 2, 2, 2,  # 88 - 8f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 90 - 97
+    2, 2, 2, 2, 2, 2, 2, 2,  # 98 - 9f
+    2, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 2, 2, 2,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 2, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    2, 2, 2, 2, 2, 2, 2, 2,  # e0 - e7
+    2, 2, 2, 2, 2, 2, 2, 2,  # e8 - ef
+    2, 2, 2, 2, 2, 2, 2, 2,  # f0 - f7
+    2, 2, 2, 2, 2, 2, 2, 2,  # f8 - ff
+)
+
+ISO2022JP_ST = (
+    MachineState.START,      3, MachineState.ERROR, MachineState.START, MachineState.START, MachineState.START, MachineState.START, MachineState.START, # 00-07
+    MachineState.START, MachineState.START, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 08-0f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, # 10-17
+    MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, # 18-1f
+    MachineState.ERROR,      5, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR,      4, MachineState.ERROR, MachineState.ERROR, # 20-27
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR,      6, MachineState.ITS_ME, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, # 28-2f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ITS_ME, # 30-37
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 38-3f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ERROR, MachineState.START, MachineState.START, # 40-47
+)
+# fmt: on
+
+ISO2022JP_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
+
+ISO2022JP_SM_MODEL = {
+    "class_table": ISO2022JP_CLS,
+    "class_factor": 10,
+    "state_table": ISO2022JP_ST,
+    "char_len_table": ISO2022JP_CHAR_LEN_TABLE,
+    "name": "ISO-2022-JP",
+    "language": "Japanese",
+}
+
+# fmt: off
+ISO2022KR_CLS = (
+    2, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 0, 0, 0, 0, 0, 0,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 1, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 3, 0, 0, 0,  # 20 - 27
+    0, 4, 0, 0, 0, 0, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    0, 0, 0, 5, 0, 0, 0, 0,  # 40 - 47
+    0, 0, 0, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 0, 0, 0, 0, 0,  # 78 - 7f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 80 - 87
+    2, 2, 2, 2, 2, 2, 2, 2,  # 88 - 8f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 90 - 97
+    2, 2, 2, 2, 2, 2, 2, 2,  # 98 - 9f
+    2, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 2, 2, 2,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 2, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    2, 2, 2, 2, 2, 2, 2, 2,  # e0 - e7
+    2, 2, 2, 2, 2, 2, 2, 2,  # e8 - ef
+    2, 2, 2, 2, 2, 2, 2, 2,  # f0 - f7
+    2, 2, 2, 2, 2, 2, 2, 2,  # f8 - ff
+)
+
+ISO2022KR_ST = (
+    MachineState.START,      3, MachineState.ERROR, MachineState.START, MachineState.START, MachineState.START, MachineState.ERROR, MachineState.ERROR, # 00-07
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ITS_ME, # 08-0f
+    MachineState.ITS_ME, MachineState.ITS_ME, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR,      4, MachineState.ERROR, MachineState.ERROR, # 10-17
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR,      5, MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, # 18-1f
+    MachineState.ERROR, MachineState.ERROR, MachineState.ERROR, MachineState.ITS_ME, MachineState.START, MachineState.START, MachineState.START, MachineState.START, # 20-27
+)
+# fmt: on
+
+ISO2022KR_CHAR_LEN_TABLE = (0, 0, 0, 0, 0, 0)
+
+ISO2022KR_SM_MODEL = {
+    "class_table": ISO2022KR_CLS,
+    "class_factor": 6,
+    "state_table": ISO2022KR_ST,
+    "char_len_table": ISO2022KR_CHAR_LEN_TABLE,
+    "name": "ISO-2022-KR",
+    "language": "Korean",
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/eucjpprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/eucjpprober.py
new file mode 100644
index 0000000..abf2e66
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/eucjpprober.py
@@ -0,0 +1,95 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCJPDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .enums import MachineState, ProbingState
+from .jpcntx import EUCJPContextAnalysis
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import EUCJP_SM_MODEL
+
+
+class EUCJPProber(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(EUCJP_SM_MODEL)
+        self.distribution_analyzer = EUCJPDistributionAnalysis()
+        self.context_analyzer = EUCJPContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-JP"
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i, byte in enumerate(byte_str):
+            # PY3K: byte_str is a byte array, so byte is an int, not a byte
+            coding_state = self.coding_sm.next_state(byte)
+            if coding_state == MachineState.ERROR:
+                self.logger.debug(
+                    "%s %s prober hit error at byte %s",
+                    self.charset_name,
+                    self.language,
+                    i,
+                )
+                self._state = ProbingState.NOT_ME
+                break
+            if coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            if coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte
+                    self.context_analyzer.feed(self._last_char, char_len)
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(byte_str[i - 1 : i + 1], char_len)
+                    self.distribution_analyzer.feed(byte_str[i - 1 : i + 1], char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if self.context_analyzer.got_enough_data() and (
+                self.get_confidence() > self.SHORTCUT_THRESHOLD
+            ):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrfreq.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrfreq.py
new file mode 100644
index 0000000..7dc3b10
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrfreq.py
@@ -0,0 +1,196 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+
+# 128  --> 0.79
+# 256  --> 0.92
+# 512  --> 0.986
+# 1024 --> 0.99944
+# 2048 --> 0.99999
+#
+# Idea Distribution Ratio = 0.98653 / (1-0.98653) = 73.24
+# Random Distribution Ration = 512 / (2350-512) = 0.279.
+#
+# Typical Distribution Ratio
+
+EUCKR_TYPICAL_DISTRIBUTION_RATIO = 6.0
+
+EUCKR_TABLE_SIZE = 2352
+
+# Char to FreqOrder table ,
+# fmt: off
+EUCKR_CHAR_TO_FREQ_ORDER = (
+  13, 130, 120,1396, 481,1719,1720, 328, 609, 212,1721, 707, 400, 299,1722,  87,
+1397,1723, 104, 536,1117,1203,1724,1267, 685,1268, 508,1725,1726,1727,1728,1398,
+1399,1729,1730,1731, 141, 621, 326,1057, 368,1732, 267, 488,  20,1733,1269,1734,
+ 945,1400,1735,  47, 904,1270,1736,1737, 773, 248,1738, 409, 313, 786, 429,1739,
+ 116, 987, 813,1401, 683,  75,1204, 145,1740,1741,1742,1743,  16, 847, 667, 622,
+ 708,1744,1745,1746, 966, 787, 304, 129,1747,  60, 820, 123, 676,1748,1749,1750,
+1751, 617,1752, 626,1753,1754,1755,1756, 653,1757,1758,1759,1760,1761,1762, 856,
+ 344,1763,1764,1765,1766,  89, 401, 418, 806, 905, 848,1767,1768,1769, 946,1205,
+ 709,1770,1118,1771, 241,1772,1773,1774,1271,1775, 569,1776, 999,1777,1778,1779,
+1780, 337, 751,1058,  28, 628, 254,1781, 177, 906, 270, 349, 891,1079,1782,  19,
+1783, 379,1784, 315,1785, 629, 754,1402, 559,1786, 636, 203,1206,1787, 710, 567,
+1788, 935, 814,1789,1790,1207, 766, 528,1791,1792,1208,1793,1794,1795,1796,1797,
+1403,1798,1799, 533,1059,1404,1405,1156,1406, 936, 884,1080,1800, 351,1801,1802,
+1803,1804,1805, 801,1806,1807,1808,1119,1809,1157, 714, 474,1407,1810, 298, 899,
+ 885,1811,1120, 802,1158,1812, 892,1813,1814,1408, 659,1815,1816,1121,1817,1818,
+1819,1820,1821,1822, 319,1823, 594, 545,1824, 815, 937,1209,1825,1826, 573,1409,
+1022,1827,1210,1828,1829,1830,1831,1832,1833, 556, 722, 807,1122,1060,1834, 697,
+1835, 900, 557, 715,1836,1410, 540,1411, 752,1159, 294, 597,1211, 976, 803, 770,
+1412,1837,1838,  39, 794,1413, 358,1839, 371, 925,1840, 453, 661, 788, 531, 723,
+ 544,1023,1081, 869,  91,1841, 392, 430, 790, 602,1414, 677,1082, 457,1415,1416,
+1842,1843, 475, 327,1024,1417, 795, 121,1844, 733, 403,1418,1845,1846,1847, 300,
+ 119, 711,1212, 627,1848,1272, 207,1849,1850, 796,1213, 382,1851, 519,1852,1083,
+ 893,1853,1854,1855, 367, 809, 487, 671,1856, 663,1857,1858, 956, 471, 306, 857,
+1859,1860,1160,1084,1861,1862,1863,1864,1865,1061,1866,1867,1868,1869,1870,1871,
+ 282,  96, 574,1872, 502,1085,1873,1214,1874, 907,1875,1876, 827, 977,1419,1420,
+1421, 268,1877,1422,1878,1879,1880, 308,1881,   2, 537,1882,1883,1215,1884,1885,
+ 127, 791,1886,1273,1423,1887,  34, 336, 404, 643,1888, 571, 654, 894, 840,1889,
+   0, 886,1274, 122, 575, 260, 908, 938,1890,1275, 410, 316,1891,1892, 100,1893,
+1894,1123,  48,1161,1124,1025,1895, 633, 901,1276,1896,1897, 115, 816,1898, 317,
+1899, 694,1900, 909, 734,1424, 572, 866,1425, 691,  85, 524,1010, 543, 394, 841,
+1901,1902,1903,1026,1904,1905,1906,1907,1908,1909,  30, 451, 651, 988, 310,1910,
+1911,1426, 810,1216,  93,1912,1913,1277,1217,1914, 858, 759,  45,  58, 181, 610,
+ 269,1915,1916, 131,1062, 551, 443,1000, 821,1427, 957, 895,1086,1917,1918, 375,
+1919, 359,1920, 687,1921, 822,1922, 293,1923,1924,  40, 662, 118, 692,  29, 939,
+ 887, 640, 482, 174,1925,  69,1162, 728,1428, 910,1926,1278,1218,1279, 386, 870,
+ 217, 854,1163, 823,1927,1928,1929,1930, 834,1931,  78,1932, 859,1933,1063,1934,
+1935,1936,1937, 438,1164, 208, 595,1938,1939,1940,1941,1219,1125,1942, 280, 888,
+1429,1430,1220,1431,1943,1944,1945,1946,1947,1280, 150, 510,1432,1948,1949,1950,
+1951,1952,1953,1954,1011,1087,1955,1433,1043,1956, 881,1957, 614, 958,1064,1065,
+1221,1958, 638,1001, 860, 967, 896,1434, 989, 492, 553,1281,1165,1959,1282,1002,
+1283,1222,1960,1961,1962,1963,  36, 383, 228, 753, 247, 454,1964, 876, 678,1965,
+1966,1284, 126, 464, 490, 835, 136, 672, 529, 940,1088,1435, 473,1967,1968, 467,
+  50, 390, 227, 587, 279, 378, 598, 792, 968, 240, 151, 160, 849, 882,1126,1285,
+ 639,1044, 133, 140, 288, 360, 811, 563,1027, 561, 142, 523,1969,1970,1971,   7,
+ 103, 296, 439, 407, 506, 634, 990,1972,1973,1974,1975, 645,1976,1977,1978,1979,
+1980,1981, 236,1982,1436,1983,1984,1089, 192, 828, 618, 518,1166, 333,1127,1985,
+ 818,1223,1986,1987,1988,1989,1990,1991,1992,1993, 342,1128,1286, 746, 842,1994,
+1995, 560, 223,1287,  98,   8, 189, 650, 978,1288,1996,1437,1997,  17, 345, 250,
+ 423, 277, 234, 512, 226,  97, 289,  42, 167,1998, 201,1999,2000, 843, 836, 824,
+ 532, 338, 783,1090, 182, 576, 436,1438,1439, 527, 500,2001, 947, 889,2002,2003,
+2004,2005, 262, 600, 314, 447,2006, 547,2007, 693, 738,1129,2008,  71,1440, 745,
+ 619, 688,2009, 829,2010,2011, 147,2012,  33, 948,2013,2014,  74, 224,2015,  61,
+ 191, 918, 399, 637,2016,1028,1130, 257, 902,2017,2018,2019,2020,2021,2022,2023,
+2024,2025,2026, 837,2027,2028,2029,2030, 179, 874, 591,  52, 724, 246,2031,2032,
+2033,2034,1167, 969,2035,1289, 630, 605, 911,1091,1168,2036,2037,2038,1441, 912,
+2039, 623,2040,2041, 253,1169,1290,2042,1442, 146, 620, 611, 577, 433,2043,1224,
+ 719,1170, 959, 440, 437, 534,  84, 388, 480,1131, 159, 220, 198, 679,2044,1012,
+ 819,1066,1443, 113,1225, 194, 318,1003,1029,2045,2046,2047,2048,1067,2049,2050,
+2051,2052,2053,  59, 913, 112,2054, 632,2055, 455, 144, 739,1291,2056, 273, 681,
+ 499,2057, 448,2058,2059, 760,2060,2061, 970, 384, 169, 245,1132,2062,2063, 414,
+1444,2064,2065,  41, 235,2066, 157, 252, 877, 568, 919, 789, 580,2067, 725,2068,
+2069,1292,2070,2071,1445,2072,1446,2073,2074,  55, 588,  66,1447, 271,1092,2075,
+1226,2076, 960,1013, 372,2077,2078,2079,2080,2081,1293,2082,2083,2084,2085, 850,
+2086,2087,2088,2089,2090, 186,2091,1068, 180,2092,2093,2094, 109,1227, 522, 606,
+2095, 867,1448,1093, 991,1171, 926, 353,1133,2096, 581,2097,2098,2099,1294,1449,
+1450,2100, 596,1172,1014,1228,2101,1451,1295,1173,1229,2102,2103,1296,1134,1452,
+ 949,1135,2104,2105,1094,1453,1454,1455,2106,1095,2107,2108,2109,2110,2111,2112,
+2113,2114,2115,2116,2117, 804,2118,2119,1230,1231, 805,1456, 405,1136,2120,2121,
+2122,2123,2124, 720, 701,1297, 992,1457, 927,1004,2125,2126,2127,2128,2129,2130,
+  22, 417,2131, 303,2132, 385,2133, 971, 520, 513,2134,1174,  73,1096, 231, 274,
+ 962,1458, 673,2135,1459,2136, 152,1137,2137,2138,2139,2140,1005,1138,1460,1139,
+2141,2142,2143,2144,  11, 374, 844,2145, 154,1232,  46,1461,2146, 838, 830, 721,
+1233, 106,2147,  90, 428, 462, 578, 566,1175, 352,2148,2149, 538,1234, 124,1298,
+2150,1462, 761, 565,2151, 686,2152, 649,2153,  72, 173,2154, 460, 415,2155,1463,
+2156,1235, 305,2157,2158,2159,2160,2161,2162, 579,2163,2164,2165,2166,2167, 747,
+2168,2169,2170,2171,1464, 669,2172,2173,2174,2175,2176,1465,2177,  23, 530, 285,
+2178, 335, 729,2179, 397,2180,2181,2182,1030,2183,2184, 698,2185,2186, 325,2187,
+2188, 369,2189, 799,1097,1015, 348,2190,1069, 680,2191, 851,1466,2192,2193,  10,
+2194, 613, 424,2195, 979, 108, 449, 589,  27, 172,  81,1031,  80, 774, 281, 350,
+1032, 525, 301, 582,1176,2196, 674,1045,2197,2198,1467, 730, 762,2199,2200,2201,
+2202,1468,2203, 993,2204,2205, 266,1070, 963,1140,2206,2207,2208, 664,1098, 972,
+2209,2210,2211,1177,1469,1470, 871,2212,2213,2214,2215,2216,1471,2217,2218,2219,
+2220,2221,2222,2223,2224,2225,2226,2227,1472,1236,2228,2229,2230,2231,2232,2233,
+2234,2235,1299,2236,2237, 200,2238, 477, 373,2239,2240, 731, 825, 777,2241,2242,
+2243, 521, 486, 548,2244,2245,2246,1473,1300,  53, 549, 137, 875,  76, 158,2247,
+1301,1474, 469, 396,1016, 278, 712,2248, 321, 442, 503, 767, 744, 941,1237,1178,
+1475,2249,  82, 178,1141,1179, 973,2250,1302,2251, 297,2252,2253, 570,2254,2255,
+2256,  18, 450, 206,2257, 290, 292,1142,2258, 511, 162,  99, 346, 164, 735,2259,
+1476,1477,   4, 554, 343, 798,1099,2260,1100,2261,  43, 171,1303, 139, 215,2262,
+2263, 717, 775,2264,1033, 322, 216,2265, 831,2266, 149,2267,1304,2268,2269, 702,
+1238, 135, 845, 347, 309,2270, 484,2271, 878, 655, 238,1006,1478,2272,  67,2273,
+ 295,2274,2275, 461,2276, 478, 942, 412,2277,1034,2278,2279,2280, 265,2281, 541,
+2282,2283,2284,2285,2286,  70, 852,1071,2287,2288,2289,2290,  21,  56, 509, 117,
+ 432,2291,2292, 331, 980, 552,1101, 148, 284, 105, 393,1180,1239, 755,2293, 187,
+2294,1046,1479,2295, 340,2296,  63,1047, 230,2297,2298,1305, 763,1306, 101, 800,
+ 808, 494,2299,2300,2301, 903,2302,  37,1072,  14,   5,2303,  79, 675,2304, 312,
+2305,2306,2307,2308,2309,1480,   6,1307,2310,2311,2312,   1, 470,  35,  24, 229,
+2313, 695, 210,  86, 778,  15, 784, 592, 779,  32,  77, 855, 964,2314, 259,2315,
+ 501, 380,2316,2317,  83, 981, 153, 689,1308,1481,1482,1483,2318,2319, 716,1484,
+2320,2321,2322,2323,2324,2325,1485,2326,2327, 128,  57,  68, 261,1048, 211, 170,
+1240,  31,2328,  51, 435, 742,2329,2330,2331, 635,2332, 264, 456,2333,2334,2335,
+ 425,2336,1486, 143, 507, 263, 943,2337, 363, 920,1487, 256,1488,1102, 243, 601,
+1489,2338,2339,2340,2341,2342,2343,2344, 861,2345,2346,2347,2348,2349,2350, 395,
+2351,1490,1491,  62, 535, 166, 225,2352,2353, 668, 419,1241, 138, 604, 928,2354,
+1181,2355,1492,1493,2356,2357,2358,1143,2359, 696,2360, 387, 307,1309, 682, 476,
+2361,2362, 332,  12, 222, 156,2363, 232,2364, 641, 276, 656, 517,1494,1495,1035,
+ 416, 736,1496,2365,1017, 586,2366,2367,2368,1497,2369, 242,2370,2371,2372,1498,
+2373, 965, 713,2374,2375,2376,2377, 740, 982,1499, 944,1500,1007,2378,2379,1310,
+1501,2380,2381,2382, 785, 329,2383,2384,1502,2385,2386,2387, 932,2388,1503,2389,
+2390,2391,2392,1242,2393,2394,2395,2396,2397, 994, 950,2398,2399,2400,2401,1504,
+1311,2402,2403,2404,2405,1049, 749,2406,2407, 853, 718,1144,1312,2408,1182,1505,
+2409,2410, 255, 516, 479, 564, 550, 214,1506,1507,1313, 413, 239, 444, 339,1145,
+1036,1508,1509,1314,1037,1510,1315,2411,1511,2412,2413,2414, 176, 703, 497, 624,
+ 593, 921, 302,2415, 341, 165,1103,1512,2416,1513,2417,2418,2419, 376,2420, 700,
+2421,2422,2423, 258, 768,1316,2424,1183,2425, 995, 608,2426,2427,2428,2429, 221,
+2430,2431,2432,2433,2434,2435,2436,2437, 195, 323, 726, 188, 897, 983,1317, 377,
+ 644,1050, 879,2438, 452,2439,2440,2441,2442,2443,2444, 914,2445,2446,2447,2448,
+ 915, 489,2449,1514,1184,2450,2451, 515,  64, 427, 495,2452, 583,2453, 483, 485,
+1038, 562, 213,1515, 748, 666,2454,2455,2456,2457, 334,2458, 780, 996,1008, 705,
+1243,2459,2460,2461,2462,2463, 114,2464, 493,1146, 366, 163,1516, 961,1104,2465,
+ 291,2466,1318,1105,2467,1517, 365,2468, 355, 951,1244,2469,1319,2470, 631,2471,
+2472, 218,1320, 364, 320, 756,1518,1519,1321,1520,1322,2473,2474,2475,2476, 997,
+2477,2478,2479,2480, 665,1185,2481, 916,1521,2482,2483,2484, 584, 684,2485,2486,
+ 797,2487,1051,1186,2488,2489,2490,1522,2491,2492, 370,2493,1039,1187,  65,2494,
+ 434, 205, 463,1188,2495, 125, 812, 391, 402, 826, 699, 286, 398, 155, 781, 771,
+ 585,2496, 590, 505,1073,2497, 599, 244, 219, 917,1018, 952, 646,1523,2498,1323,
+2499,2500,  49, 984, 354, 741,2501, 625,2502,1324,2503,1019, 190, 357, 757, 491,
+  95, 782, 868,2504,2505,2506,2507,2508,2509, 134,1524,1074, 422,1525, 898,2510,
+ 161,2511,2512,2513,2514, 769,2515,1526,2516,2517, 411,1325,2518, 472,1527,2519,
+2520,2521,2522,2523,2524, 985,2525,2526,2527,2528,2529,2530, 764,2531,1245,2532,
+2533,  25, 204, 311,2534, 496,2535,1052,2536,2537,2538,2539,2540,2541,2542, 199,
+ 704, 504, 468, 758, 657,1528, 196,  44, 839,1246, 272, 750,2543, 765, 862,2544,
+2545,1326,2546, 132, 615, 933,2547, 732,2548,2549,2550,1189,1529,2551, 283,1247,
+1053, 607, 929,2552,2553,2554, 930, 183, 872, 616,1040,1147,2555,1148,1020, 441,
+ 249,1075,2556,2557,2558, 466, 743,2559,2560,2561,  92, 514, 426, 420, 526,2562,
+2563,2564,2565,2566,2567,2568, 185,2569,2570,2571,2572, 776,1530, 658,2573, 362,
+2574, 361, 922,1076, 793,2575,2576,2577,2578,2579,2580,1531, 251,2581,2582,2583,
+2584,1532,  54, 612, 237,1327,2585,2586, 275, 408, 647, 111,2587,1533,1106, 465,
+   3, 458,   9,  38,2588, 107, 110, 890, 209,  26, 737, 498,2589,1534,2590, 431,
+ 202,  88,1535, 356, 287,1107, 660,1149,2591, 381,1536, 986,1150, 445,1248,1151,
+ 974,2592,2593, 846,2594, 446, 953, 184,1249,1250, 727,2595, 923, 193, 883,2596,
+2597,2598, 102, 324, 539, 817,2599, 421,1041,2600, 832,2601,  94, 175, 197, 406,
+2602, 459,2603,2604,2605,2606,2607, 330, 555,2608,2609,2610, 706,1108, 389,2611,
+2612,2613,2614, 233,2615, 833, 558, 931, 954,1251,2616,2617,1537, 546,2618,2619,
+1009,2620,2621,2622,1538, 690,1328,2623, 955,2624,1539,2625,2626, 772,2627,2628,
+2629,2630,2631, 924, 648, 863, 603,2632,2633, 934,1540, 864, 865,2634, 642,1042,
+ 670,1190,2635,2636,2637,2638, 168,2639, 652, 873, 542,1054,1541,2640,2641,2642,  # 512, 256
+)
+# fmt: on
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrprober.py
new file mode 100644
index 0000000..154a6d2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euckrprober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCKRDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import EUCKR_SM_MODEL
+
+
+class EUCKRProber(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(EUCKR_SM_MODEL)
+        self.distribution_analyzer = EUCKRDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-KR"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwfreq.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwfreq.py
new file mode 100644
index 0000000..4900ccc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwfreq.py
@@ -0,0 +1,388 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# EUCTW frequency table
+# Converted from big5 work
+# by Taiwan's Mandarin Promotion Council
+# <http:#www.edu.tw:81/mandr/>
+
+# 128  --> 0.42261
+# 256  --> 0.57851
+# 512  --> 0.74851
+# 1024 --> 0.89384
+# 2048 --> 0.97583
+#
+# Idea Distribution Ratio = 0.74851/(1-0.74851) =2.98
+# Random Distribution Ration = 512/(5401-512)=0.105
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher than RDR
+
+EUCTW_TYPICAL_DISTRIBUTION_RATIO = 0.75
+
+# Char to FreqOrder table
+EUCTW_TABLE_SIZE = 5376
+
+# fmt: off
+EUCTW_CHAR_TO_FREQ_ORDER = (
+    1, 1800, 1506, 255, 1431, 198, 9, 82, 6, 7310, 177, 202, 3615, 1256, 2808, 110,  # 2742
+    3735, 33, 3241, 261, 76, 44, 2113, 16, 2931, 2184, 1176, 659, 3868, 26, 3404, 2643,  # 2758
+    1198, 3869, 3313, 4060, 410, 2211, 302, 590, 361, 1963, 8, 204, 58, 4296, 7311, 1931,  # 2774
+    63, 7312, 7313, 317, 1614, 75, 222, 159, 4061, 2412, 1480, 7314, 3500, 3068, 224, 2809,  # 2790
+    3616, 3, 10, 3870, 1471, 29, 2774, 1135, 2852, 1939, 873, 130, 3242, 1123, 312, 7315,  # 2806
+    4297, 2051, 507, 252, 682, 7316, 142, 1914, 124, 206, 2932, 34, 3501, 3173, 64, 604,  # 2822
+    7317, 2494, 1976, 1977, 155, 1990, 645, 641, 1606, 7318, 3405, 337, 72, 406, 7319, 80,  # 2838
+    630, 238, 3174, 1509, 263, 939, 1092, 2644, 756, 1440, 1094, 3406, 449, 69, 2969, 591,  # 2854
+    179, 2095, 471, 115, 2034, 1843, 60, 50, 2970, 134, 806, 1868, 734, 2035, 3407, 180,  # 2870
+    995, 1607, 156, 537, 2893, 688, 7320, 319, 1305, 779, 2144, 514, 2374, 298, 4298, 359,  # 2886
+    2495, 90, 2707, 1338, 663, 11, 906, 1099, 2545, 20, 2436, 182, 532, 1716, 7321, 732,  # 2902
+    1376, 4062, 1311, 1420, 3175, 25, 2312, 1056, 113, 399, 382, 1949, 242, 3408, 2467, 529,  # 2918
+    3243, 475, 1447, 3617, 7322, 117, 21, 656, 810, 1297, 2295, 2329, 3502, 7323, 126, 4063,  # 2934
+    706, 456, 150, 613, 4299, 71, 1118, 2036, 4064, 145, 3069, 85, 835, 486, 2114, 1246,  # 2950
+    1426, 428, 727, 1285, 1015, 800, 106, 623, 303, 1281, 7324, 2127, 2354, 347, 3736, 221,  # 2966
+    3503, 3110, 7325, 1955, 1153, 4065, 83, 296, 1199, 3070, 192, 624, 93, 7326, 822, 1897,  # 2982
+    2810, 3111, 795, 2064, 991, 1554, 1542, 1592, 27, 43, 2853, 859, 139, 1456, 860, 4300,  # 2998
+    437, 712, 3871, 164, 2392, 3112, 695, 211, 3017, 2096, 195, 3872, 1608, 3504, 3505, 3618,  # 3014
+    3873, 234, 811, 2971, 2097, 3874, 2229, 1441, 3506, 1615, 2375, 668, 2076, 1638, 305, 228,  # 3030
+    1664, 4301, 467, 415, 7327, 262, 2098, 1593, 239, 108, 300, 200, 1033, 512, 1247, 2077,  # 3046
+    7328, 7329, 2173, 3176, 3619, 2673, 593, 845, 1062, 3244, 88, 1723, 2037, 3875, 1950, 212,  # 3062
+    266, 152, 149, 468, 1898, 4066, 4302, 77, 187, 7330, 3018, 37, 5, 2972, 7331, 3876,  # 3078
+    7332, 7333, 39, 2517, 4303, 2894, 3177, 2078, 55, 148, 74, 4304, 545, 483, 1474, 1029,  # 3094
+    1665, 217, 1869, 1531, 3113, 1104, 2645, 4067, 24, 172, 3507, 900, 3877, 3508, 3509, 4305,  # 3110
+    32, 1408, 2811, 1312, 329, 487, 2355, 2247, 2708, 784, 2674, 4, 3019, 3314, 1427, 1788,  # 3126
+    188, 109, 499, 7334, 3620, 1717, 1789, 888, 1217, 3020, 4306, 7335, 3510, 7336, 3315, 1520,  # 3142
+    3621, 3878, 196, 1034, 775, 7337, 7338, 929, 1815, 249, 439, 38, 7339, 1063, 7340, 794,  # 3158
+    3879, 1435, 2296, 46, 178, 3245, 2065, 7341, 2376, 7342, 214, 1709, 4307, 804, 35, 707,  # 3174
+    324, 3622, 1601, 2546, 140, 459, 4068, 7343, 7344, 1365, 839, 272, 978, 2257, 2572, 3409,  # 3190
+    2128, 1363, 3623, 1423, 697, 100, 3071, 48, 70, 1231, 495, 3114, 2193, 7345, 1294, 7346,  # 3206
+    2079, 462, 586, 1042, 3246, 853, 256, 988, 185, 2377, 3410, 1698, 434, 1084, 7347, 3411,  # 3222
+    314, 2615, 2775, 4308, 2330, 2331, 569, 2280, 637, 1816, 2518, 757, 1162, 1878, 1616, 3412,  # 3238
+    287, 1577, 2115, 768, 4309, 1671, 2854, 3511, 2519, 1321, 3737, 909, 2413, 7348, 4069, 933,  # 3254
+    3738, 7349, 2052, 2356, 1222, 4310, 765, 2414, 1322, 786, 4311, 7350, 1919, 1462, 1677, 2895,  # 3270
+    1699, 7351, 4312, 1424, 2437, 3115, 3624, 2590, 3316, 1774, 1940, 3413, 3880, 4070, 309, 1369,  # 3286
+    1130, 2812, 364, 2230, 1653, 1299, 3881, 3512, 3882, 3883, 2646, 525, 1085, 3021, 902, 2000,  # 3302
+    1475, 964, 4313, 421, 1844, 1415, 1057, 2281, 940, 1364, 3116, 376, 4314, 4315, 1381, 7,  # 3318
+    2520, 983, 2378, 336, 1710, 2675, 1845, 321, 3414, 559, 1131, 3022, 2742, 1808, 1132, 1313,  # 3334
+    265, 1481, 1857, 7352, 352, 1203, 2813, 3247, 167, 1089, 420, 2814, 776, 792, 1724, 3513,  # 3350
+    4071, 2438, 3248, 7353, 4072, 7354, 446, 229, 333, 2743, 901, 3739, 1200, 1557, 4316, 2647,  # 3366
+    1920, 395, 2744, 2676, 3740, 4073, 1835, 125, 916, 3178, 2616, 4317, 7355, 7356, 3741, 7357,  # 3382
+    7358, 7359, 4318, 3117, 3625, 1133, 2547, 1757, 3415, 1510, 2313, 1409, 3514, 7360, 2145, 438,  # 3398
+    2591, 2896, 2379, 3317, 1068, 958, 3023, 461, 311, 2855, 2677, 4074, 1915, 3179, 4075, 1978,  # 3414
+    383, 750, 2745, 2617, 4076, 274, 539, 385, 1278, 1442, 7361, 1154, 1964, 384, 561, 210,  # 3430
+    98, 1295, 2548, 3515, 7362, 1711, 2415, 1482, 3416, 3884, 2897, 1257, 129, 7363, 3742, 642,  # 3446
+    523, 2776, 2777, 2648, 7364, 141, 2231, 1333, 68, 176, 441, 876, 907, 4077, 603, 2592,  # 3462
+    710, 171, 3417, 404, 549, 18, 3118, 2393, 1410, 3626, 1666, 7365, 3516, 4319, 2898, 4320,  # 3478
+    7366, 2973, 368, 7367, 146, 366, 99, 871, 3627, 1543, 748, 807, 1586, 1185, 22, 2258,  # 3494
+    379, 3743, 3180, 7368, 3181, 505, 1941, 2618, 1991, 1382, 2314, 7369, 380, 2357, 218, 702,  # 3510
+    1817, 1248, 3418, 3024, 3517, 3318, 3249, 7370, 2974, 3628, 930, 3250, 3744, 7371, 59, 7372,  # 3526
+    585, 601, 4078, 497, 3419, 1112, 1314, 4321, 1801, 7373, 1223, 1472, 2174, 7374, 749, 1836,  # 3542
+    690, 1899, 3745, 1772, 3885, 1476, 429, 1043, 1790, 2232, 2116, 917, 4079, 447, 1086, 1629,  # 3558
+    7375, 556, 7376, 7377, 2020, 1654, 844, 1090, 105, 550, 966, 1758, 2815, 1008, 1782, 686,  # 3574
+    1095, 7378, 2282, 793, 1602, 7379, 3518, 2593, 4322, 4080, 2933, 2297, 4323, 3746, 980, 2496,  # 3590
+    544, 353, 527, 4324, 908, 2678, 2899, 7380, 381, 2619, 1942, 1348, 7381, 1341, 1252, 560,  # 3606
+    3072, 7382, 3420, 2856, 7383, 2053, 973, 886, 2080, 143, 4325, 7384, 7385, 157, 3886, 496,  # 3622
+    4081, 57, 840, 540, 2038, 4326, 4327, 3421, 2117, 1445, 970, 2259, 1748, 1965, 2081, 4082,  # 3638
+    3119, 1234, 1775, 3251, 2816, 3629, 773, 1206, 2129, 1066, 2039, 1326, 3887, 1738, 1725, 4083,  # 3654
+    279, 3120, 51, 1544, 2594, 423, 1578, 2130, 2066, 173, 4328, 1879, 7386, 7387, 1583, 264,  # 3670
+    610, 3630, 4329, 2439, 280, 154, 7388, 7389, 7390, 1739, 338, 1282, 3073, 693, 2857, 1411,  # 3686
+    1074, 3747, 2440, 7391, 4330, 7392, 7393, 1240, 952, 2394, 7394, 2900, 1538, 2679, 685, 1483,  # 3702
+    4084, 2468, 1436, 953, 4085, 2054, 4331, 671, 2395, 79, 4086, 2441, 3252, 608, 567, 2680,  # 3718
+    3422, 4087, 4088, 1691, 393, 1261, 1791, 2396, 7395, 4332, 7396, 7397, 7398, 7399, 1383, 1672,  # 3734
+    3748, 3182, 1464, 522, 1119, 661, 1150, 216, 675, 4333, 3888, 1432, 3519, 609, 4334, 2681,  # 3750
+    2397, 7400, 7401, 7402, 4089, 3025, 0, 7403, 2469, 315, 231, 2442, 301, 3319, 4335, 2380,  # 3766
+    7404, 233, 4090, 3631, 1818, 4336, 4337, 7405, 96, 1776, 1315, 2082, 7406, 257, 7407, 1809,  # 3782
+    3632, 2709, 1139, 1819, 4091, 2021, 1124, 2163, 2778, 1777, 2649, 7408, 3074, 363, 1655, 3183,  # 3798
+    7409, 2975, 7410, 7411, 7412, 3889, 1567, 3890, 718, 103, 3184, 849, 1443, 341, 3320, 2934,  # 3814
+    1484, 7413, 1712, 127, 67, 339, 4092, 2398, 679, 1412, 821, 7414, 7415, 834, 738, 351,  # 3830
+    2976, 2146, 846, 235, 1497, 1880, 418, 1992, 3749, 2710, 186, 1100, 2147, 2746, 3520, 1545,  # 3846
+    1355, 2935, 2858, 1377, 583, 3891, 4093, 2573, 2977, 7416, 1298, 3633, 1078, 2549, 3634, 2358,  # 3862
+    78, 3750, 3751, 267, 1289, 2099, 2001, 1594, 4094, 348, 369, 1274, 2194, 2175, 1837, 4338,  # 3878
+    1820, 2817, 3635, 2747, 2283, 2002, 4339, 2936, 2748, 144, 3321, 882, 4340, 3892, 2749, 3423,  # 3894
+    4341, 2901, 7417, 4095, 1726, 320, 7418, 3893, 3026, 788, 2978, 7419, 2818, 1773, 1327, 2859,  # 3910
+    3894, 2819, 7420, 1306, 4342, 2003, 1700, 3752, 3521, 2359, 2650, 787, 2022, 506, 824, 3636,  # 3926
+    534, 323, 4343, 1044, 3322, 2023, 1900, 946, 3424, 7421, 1778, 1500, 1678, 7422, 1881, 4344,  # 3942
+    165, 243, 4345, 3637, 2521, 123, 683, 4096, 764, 4346, 36, 3895, 1792, 589, 2902, 816,  # 3958
+    626, 1667, 3027, 2233, 1639, 1555, 1622, 3753, 3896, 7423, 3897, 2860, 1370, 1228, 1932, 891,  # 3974
+    2083, 2903, 304, 4097, 7424, 292, 2979, 2711, 3522, 691, 2100, 4098, 1115, 4347, 118, 662,  # 3990
+    7425, 611, 1156, 854, 2381, 1316, 2861, 2, 386, 515, 2904, 7426, 7427, 3253, 868, 2234,  # 4006
+    1486, 855, 2651, 785, 2212, 3028, 7428, 1040, 3185, 3523, 7429, 3121, 448, 7430, 1525, 7431,  # 4022
+    2164, 4348, 7432, 3754, 7433, 4099, 2820, 3524, 3122, 503, 818, 3898, 3123, 1568, 814, 676,  # 4038
+    1444, 306, 1749, 7434, 3755, 1416, 1030, 197, 1428, 805, 2821, 1501, 4349, 7435, 7436, 7437,  # 4054
+    1993, 7438, 4350, 7439, 7440, 2195, 13, 2779, 3638, 2980, 3124, 1229, 1916, 7441, 3756, 2131,  # 4070
+    7442, 4100, 4351, 2399, 3525, 7443, 2213, 1511, 1727, 1120, 7444, 7445, 646, 3757, 2443, 307,  # 4086
+    7446, 7447, 1595, 3186, 7448, 7449, 7450, 3639, 1113, 1356, 3899, 1465, 2522, 2523, 7451, 519,  # 4102
+    7452, 128, 2132, 92, 2284, 1979, 7453, 3900, 1512, 342, 3125, 2196, 7454, 2780, 2214, 1980,  # 4118
+    3323, 7455, 290, 1656, 1317, 789, 827, 2360, 7456, 3758, 4352, 562, 581, 3901, 7457, 401,  # 4134
+    4353, 2248, 94, 4354, 1399, 2781, 7458, 1463, 2024, 4355, 3187, 1943, 7459, 828, 1105, 4101,  # 4150
+    1262, 1394, 7460, 4102, 605, 4356, 7461, 1783, 2862, 7462, 2822, 819, 2101, 578, 2197, 2937,  # 4166
+    7463, 1502, 436, 3254, 4103, 3255, 2823, 3902, 2905, 3425, 3426, 7464, 2712, 2315, 7465, 7466,  # 4182
+    2332, 2067, 23, 4357, 193, 826, 3759, 2102, 699, 1630, 4104, 3075, 390, 1793, 1064, 3526,  # 4198
+    7467, 1579, 3076, 3077, 1400, 7468, 4105, 1838, 1640, 2863, 7469, 4358, 4359, 137, 4106, 598,  # 4214
+    3078, 1966, 780, 104, 974, 2938, 7470, 278, 899, 253, 402, 572, 504, 493, 1339, 7471,  # 4230
+    3903, 1275, 4360, 2574, 2550, 7472, 3640, 3029, 3079, 2249, 565, 1334, 2713, 863, 41, 7473,  # 4246
+    7474, 4361, 7475, 1657, 2333, 19, 463, 2750, 4107, 606, 7476, 2981, 3256, 1087, 2084, 1323,  # 4262
+    2652, 2982, 7477, 1631, 1623, 1750, 4108, 2682, 7478, 2864, 791, 2714, 2653, 2334, 232, 2416,  # 4278
+    7479, 2983, 1498, 7480, 2654, 2620, 755, 1366, 3641, 3257, 3126, 2025, 1609, 119, 1917, 3427,  # 4294
+    862, 1026, 4109, 7481, 3904, 3760, 4362, 3905, 4363, 2260, 1951, 2470, 7482, 1125, 817, 4110,  # 4310
+    4111, 3906, 1513, 1766, 2040, 1487, 4112, 3030, 3258, 2824, 3761, 3127, 7483, 7484, 1507, 7485,  # 4326
+    2683, 733, 40, 1632, 1106, 2865, 345, 4113, 841, 2524, 230, 4364, 2984, 1846, 3259, 3428,  # 4342
+    7486, 1263, 986, 3429, 7487, 735, 879, 254, 1137, 857, 622, 1300, 1180, 1388, 1562, 3907,  # 4358
+    3908, 2939, 967, 2751, 2655, 1349, 592, 2133, 1692, 3324, 2985, 1994, 4114, 1679, 3909, 1901,  # 4374
+    2185, 7488, 739, 3642, 2715, 1296, 1290, 7489, 4115, 2198, 2199, 1921, 1563, 2595, 2551, 1870,  # 4390
+    2752, 2986, 7490, 435, 7491, 343, 1108, 596, 17, 1751, 4365, 2235, 3430, 3643, 7492, 4366,  # 4406
+    294, 3527, 2940, 1693, 477, 979, 281, 2041, 3528, 643, 2042, 3644, 2621, 2782, 2261, 1031,  # 4422
+    2335, 2134, 2298, 3529, 4367, 367, 1249, 2552, 7493, 3530, 7494, 4368, 1283, 3325, 2004, 240,  # 4438
+    1762, 3326, 4369, 4370, 836, 1069, 3128, 474, 7495, 2148, 2525, 268, 3531, 7496, 3188, 1521,  # 4454
+    1284, 7497, 1658, 1546, 4116, 7498, 3532, 3533, 7499, 4117, 3327, 2684, 1685, 4118, 961, 1673,  # 4470
+    2622, 190, 2005, 2200, 3762, 4371, 4372, 7500, 570, 2497, 3645, 1490, 7501, 4373, 2623, 3260,  # 4486
+    1956, 4374, 584, 1514, 396, 1045, 1944, 7502, 4375, 1967, 2444, 7503, 7504, 4376, 3910, 619,  # 4502
+    7505, 3129, 3261, 215, 2006, 2783, 2553, 3189, 4377, 3190, 4378, 763, 4119, 3763, 4379, 7506,  # 4518
+    7507, 1957, 1767, 2941, 3328, 3646, 1174, 452, 1477, 4380, 3329, 3130, 7508, 2825, 1253, 2382,  # 4534
+    2186, 1091, 2285, 4120, 492, 7509, 638, 1169, 1824, 2135, 1752, 3911, 648, 926, 1021, 1324,  # 4550
+    4381, 520, 4382, 997, 847, 1007, 892, 4383, 3764, 2262, 1871, 3647, 7510, 2400, 1784, 4384,  # 4566
+    1952, 2942, 3080, 3191, 1728, 4121, 2043, 3648, 4385, 2007, 1701, 3131, 1551, 30, 2263, 4122,  # 4582
+    7511, 2026, 4386, 3534, 7512, 501, 7513, 4123, 594, 3431, 2165, 1821, 3535, 3432, 3536, 3192,  # 4598
+    829, 2826, 4124, 7514, 1680, 3132, 1225, 4125, 7515, 3262, 4387, 4126, 3133, 2336, 7516, 4388,  # 4614
+    4127, 7517, 3912, 3913, 7518, 1847, 2383, 2596, 3330, 7519, 4389, 374, 3914, 652, 4128, 4129,  # 4630
+    375, 1140, 798, 7520, 7521, 7522, 2361, 4390, 2264, 546, 1659, 138, 3031, 2445, 4391, 7523,  # 4646
+    2250, 612, 1848, 910, 796, 3765, 1740, 1371, 825, 3766, 3767, 7524, 2906, 2554, 7525, 692,  # 4662
+    444, 3032, 2624, 801, 4392, 4130, 7526, 1491, 244, 1053, 3033, 4131, 4132, 340, 7527, 3915,  # 4678
+    1041, 2987, 293, 1168, 87, 1357, 7528, 1539, 959, 7529, 2236, 721, 694, 4133, 3768, 219,  # 4694
+    1478, 644, 1417, 3331, 2656, 1413, 1401, 1335, 1389, 3916, 7530, 7531, 2988, 2362, 3134, 1825,  # 4710
+    730, 1515, 184, 2827, 66, 4393, 7532, 1660, 2943, 246, 3332, 378, 1457, 226, 3433, 975,  # 4726
+    3917, 2944, 1264, 3537, 674, 696, 7533, 163, 7534, 1141, 2417, 2166, 713, 3538, 3333, 4394,  # 4742
+    3918, 7535, 7536, 1186, 15, 7537, 1079, 1070, 7538, 1522, 3193, 3539, 276, 1050, 2716, 758,  # 4758
+    1126, 653, 2945, 3263, 7539, 2337, 889, 3540, 3919, 3081, 2989, 903, 1250, 4395, 3920, 3434,  # 4774
+    3541, 1342, 1681, 1718, 766, 3264, 286, 89, 2946, 3649, 7540, 1713, 7541, 2597, 3334, 2990,  # 4790
+    7542, 2947, 2215, 3194, 2866, 7543, 4396, 2498, 2526, 181, 387, 1075, 3921, 731, 2187, 3335,  # 4806
+    7544, 3265, 310, 313, 3435, 2299, 770, 4134, 54, 3034, 189, 4397, 3082, 3769, 3922, 7545,  # 4822
+    1230, 1617, 1849, 355, 3542, 4135, 4398, 3336, 111, 4136, 3650, 1350, 3135, 3436, 3035, 4137,  # 4838
+    2149, 3266, 3543, 7546, 2784, 3923, 3924, 2991, 722, 2008, 7547, 1071, 247, 1207, 2338, 2471,  # 4854
+    1378, 4399, 2009, 864, 1437, 1214, 4400, 373, 3770, 1142, 2216, 667, 4401, 442, 2753, 2555,  # 4870
+    3771, 3925, 1968, 4138, 3267, 1839, 837, 170, 1107, 934, 1336, 1882, 7548, 7549, 2118, 4139,  # 4886
+    2828, 743, 1569, 7550, 4402, 4140, 582, 2384, 1418, 3437, 7551, 1802, 7552, 357, 1395, 1729,  # 4902
+    3651, 3268, 2418, 1564, 2237, 7553, 3083, 3772, 1633, 4403, 1114, 2085, 4141, 1532, 7554, 482,  # 4918
+    2446, 4404, 7555, 7556, 1492, 833, 1466, 7557, 2717, 3544, 1641, 2829, 7558, 1526, 1272, 3652,  # 4934
+    4142, 1686, 1794, 416, 2556, 1902, 1953, 1803, 7559, 3773, 2785, 3774, 1159, 2316, 7560, 2867,  # 4950
+    4405, 1610, 1584, 3036, 2419, 2754, 443, 3269, 1163, 3136, 7561, 7562, 3926, 7563, 4143, 2499,  # 4966
+    3037, 4406, 3927, 3137, 2103, 1647, 3545, 2010, 1872, 4144, 7564, 4145, 431, 3438, 7565, 250,  # 4982
+    97, 81, 4146, 7566, 1648, 1850, 1558, 160, 848, 7567, 866, 740, 1694, 7568, 2201, 2830,  # 4998
+    3195, 4147, 4407, 3653, 1687, 950, 2472, 426, 469, 3196, 3654, 3655, 3928, 7569, 7570, 1188,  # 5014
+    424, 1995, 861, 3546, 4148, 3775, 2202, 2685, 168, 1235, 3547, 4149, 7571, 2086, 1674, 4408,  # 5030
+    3337, 3270, 220, 2557, 1009, 7572, 3776, 670, 2992, 332, 1208, 717, 7573, 7574, 3548, 2447,  # 5046
+    3929, 3338, 7575, 513, 7576, 1209, 2868, 3339, 3138, 4409, 1080, 7577, 7578, 7579, 7580, 2527,  # 5062
+    3656, 3549, 815, 1587, 3930, 3931, 7581, 3550, 3439, 3777, 1254, 4410, 1328, 3038, 1390, 3932,  # 5078
+    1741, 3933, 3778, 3934, 7582, 236, 3779, 2448, 3271, 7583, 7584, 3657, 3780, 1273, 3781, 4411,  # 5094
+    7585, 308, 7586, 4412, 245, 4413, 1851, 2473, 1307, 2575, 430, 715, 2136, 2449, 7587, 270,  # 5110
+    199, 2869, 3935, 7588, 3551, 2718, 1753, 761, 1754, 725, 1661, 1840, 4414, 3440, 3658, 7589,  # 5126
+    7590, 587, 14, 3272, 227, 2598, 326, 480, 2265, 943, 2755, 3552, 291, 650, 1883, 7591,  # 5142
+    1702, 1226, 102, 1547, 62, 3441, 904, 4415, 3442, 1164, 4150, 7592, 7593, 1224, 1548, 2756,  # 5158
+    391, 498, 1493, 7594, 1386, 1419, 7595, 2055, 1177, 4416, 813, 880, 1081, 2363, 566, 1145,  # 5174
+    4417, 2286, 1001, 1035, 2558, 2599, 2238, 394, 1286, 7596, 7597, 2068, 7598, 86, 1494, 1730,  # 5190
+    3936, 491, 1588, 745, 897, 2948, 843, 3340, 3937, 2757, 2870, 3273, 1768, 998, 2217, 2069,  # 5206
+    397, 1826, 1195, 1969, 3659, 2993, 3341, 284, 7599, 3782, 2500, 2137, 2119, 1903, 7600, 3938,  # 5222
+    2150, 3939, 4151, 1036, 3443, 1904, 114, 2559, 4152, 209, 1527, 7601, 7602, 2949, 2831, 2625,  # 5238
+    2385, 2719, 3139, 812, 2560, 7603, 3274, 7604, 1559, 737, 1884, 3660, 1210, 885, 28, 2686,  # 5254
+    3553, 3783, 7605, 4153, 1004, 1779, 4418, 7606, 346, 1981, 2218, 2687, 4419, 3784, 1742, 797,  # 5270
+    1642, 3940, 1933, 1072, 1384, 2151, 896, 3941, 3275, 3661, 3197, 2871, 3554, 7607, 2561, 1958,  # 5286
+    4420, 2450, 1785, 7608, 7609, 7610, 3942, 4154, 1005, 1308, 3662, 4155, 2720, 4421, 4422, 1528,  # 5302
+    2600, 161, 1178, 4156, 1982, 987, 4423, 1101, 4157, 631, 3943, 1157, 3198, 2420, 1343, 1241,  # 5318
+    1016, 2239, 2562, 372, 877, 2339, 2501, 1160, 555, 1934, 911, 3944, 7611, 466, 1170, 169,  # 5334
+    1051, 2907, 2688, 3663, 2474, 2994, 1182, 2011, 2563, 1251, 2626, 7612, 992, 2340, 3444, 1540,  # 5350
+    2721, 1201, 2070, 2401, 1996, 2475, 7613, 4424, 528, 1922, 2188, 1503, 1873, 1570, 2364, 3342,  # 5366
+    3276, 7614, 557, 1073, 7615, 1827, 3445, 2087, 2266, 3140, 3039, 3084, 767, 3085, 2786, 4425,  # 5382
+    1006, 4158, 4426, 2341, 1267, 2176, 3664, 3199, 778, 3945, 3200, 2722, 1597, 2657, 7616, 4427,  # 5398
+    7617, 3446, 7618, 7619, 7620, 3277, 2689, 1433, 3278, 131, 95, 1504, 3946, 723, 4159, 3141,  # 5414
+    1841, 3555, 2758, 2189, 3947, 2027, 2104, 3665, 7621, 2995, 3948, 1218, 7622, 3343, 3201, 3949,  # 5430
+    4160, 2576, 248, 1634, 3785, 912, 7623, 2832, 3666, 3040, 3786, 654, 53, 7624, 2996, 7625,  # 5446
+    1688, 4428, 777, 3447, 1032, 3950, 1425, 7626, 191, 820, 2120, 2833, 971, 4429, 931, 3202,  # 5462
+    135, 664, 783, 3787, 1997, 772, 2908, 1935, 3951, 3788, 4430, 2909, 3203, 282, 2723, 640,  # 5478
+    1372, 3448, 1127, 922, 325, 3344, 7627, 7628, 711, 2044, 7629, 7630, 3952, 2219, 2787, 1936,  # 5494
+    3953, 3345, 2220, 2251, 3789, 2300, 7631, 4431, 3790, 1258, 3279, 3954, 3204, 2138, 2950, 3955,  # 5510
+    3956, 7632, 2221, 258, 3205, 4432, 101, 1227, 7633, 3280, 1755, 7634, 1391, 3281, 7635, 2910,  # 5526
+    2056, 893, 7636, 7637, 7638, 1402, 4161, 2342, 7639, 7640, 3206, 3556, 7641, 7642, 878, 1325,  # 5542
+    1780, 2788, 4433, 259, 1385, 2577, 744, 1183, 2267, 4434, 7643, 3957, 2502, 7644, 684, 1024,  # 5558
+    4162, 7645, 472, 3557, 3449, 1165, 3282, 3958, 3959, 322, 2152, 881, 455, 1695, 1152, 1340,  # 5574
+    660, 554, 2153, 4435, 1058, 4436, 4163, 830, 1065, 3346, 3960, 4437, 1923, 7646, 1703, 1918,  # 5590
+    7647, 932, 2268, 122, 7648, 4438, 947, 677, 7649, 3791, 2627, 297, 1905, 1924, 2269, 4439,  # 5606
+    2317, 3283, 7650, 7651, 4164, 7652, 4165, 84, 4166, 112, 989, 7653, 547, 1059, 3961, 701,  # 5622
+    3558, 1019, 7654, 4167, 7655, 3450, 942, 639, 457, 2301, 2451, 993, 2951, 407, 851, 494,  # 5638
+    4440, 3347, 927, 7656, 1237, 7657, 2421, 3348, 573, 4168, 680, 921, 2911, 1279, 1874, 285,  # 5654
+    790, 1448, 1983, 719, 2167, 7658, 7659, 4441, 3962, 3963, 1649, 7660, 1541, 563, 7661, 1077,  # 5670
+    7662, 3349, 3041, 3451, 511, 2997, 3964, 3965, 3667, 3966, 1268, 2564, 3350, 3207, 4442, 4443,  # 5686
+    7663, 535, 1048, 1276, 1189, 2912, 2028, 3142, 1438, 1373, 2834, 2952, 1134, 2012, 7664, 4169,  # 5702
+    1238, 2578, 3086, 1259, 7665, 700, 7666, 2953, 3143, 3668, 4170, 7667, 4171, 1146, 1875, 1906,  # 5718
+    4444, 2601, 3967, 781, 2422, 132, 1589, 203, 147, 273, 2789, 2402, 898, 1786, 2154, 3968,  # 5734
+    3969, 7668, 3792, 2790, 7669, 7670, 4445, 4446, 7671, 3208, 7672, 1635, 3793, 965, 7673, 1804,  # 5750
+    2690, 1516, 3559, 1121, 1082, 1329, 3284, 3970, 1449, 3794, 65, 1128, 2835, 2913, 2759, 1590,  # 5766
+    3795, 7674, 7675, 12, 2658, 45, 976, 2579, 3144, 4447, 517, 2528, 1013, 1037, 3209, 7676,  # 5782
+    3796, 2836, 7677, 3797, 7678, 3452, 7679, 2602, 614, 1998, 2318, 3798, 3087, 2724, 2628, 7680,  # 5798
+    2580, 4172, 599, 1269, 7681, 1810, 3669, 7682, 2691, 3088, 759, 1060, 489, 1805, 3351, 3285,  # 5814
+    1358, 7683, 7684, 2386, 1387, 1215, 2629, 2252, 490, 7685, 7686, 4173, 1759, 2387, 2343, 7687,  # 5830
+    4448, 3799, 1907, 3971, 2630, 1806, 3210, 4449, 3453, 3286, 2760, 2344, 874, 7688, 7689, 3454,  # 5846
+    3670, 1858, 91, 2914, 3671, 3042, 3800, 4450, 7690, 3145, 3972, 2659, 7691, 3455, 1202, 1403,  # 5862
+    3801, 2954, 2529, 1517, 2503, 4451, 3456, 2504, 7692, 4452, 7693, 2692, 1885, 1495, 1731, 3973,  # 5878
+    2365, 4453, 7694, 2029, 7695, 7696, 3974, 2693, 1216, 237, 2581, 4174, 2319, 3975, 3802, 4454,  # 5894
+    4455, 2694, 3560, 3457, 445, 4456, 7697, 7698, 7699, 7700, 2761, 61, 3976, 3672, 1822, 3977,  # 5910
+    7701, 687, 2045, 935, 925, 405, 2660, 703, 1096, 1859, 2725, 4457, 3978, 1876, 1367, 2695,  # 5926
+    3352, 918, 2105, 1781, 2476, 334, 3287, 1611, 1093, 4458, 564, 3146, 3458, 3673, 3353, 945,  # 5942
+    2631, 2057, 4459, 7702, 1925, 872, 4175, 7703, 3459, 2696, 3089, 349, 4176, 3674, 3979, 4460,  # 5958
+    3803, 4177, 3675, 2155, 3980, 4461, 4462, 4178, 4463, 2403, 2046, 782, 3981, 400, 251, 4179,  # 5974
+    1624, 7704, 7705, 277, 3676, 299, 1265, 476, 1191, 3804, 2121, 4180, 4181, 1109, 205, 7706,  # 5990
+    2582, 1000, 2156, 3561, 1860, 7707, 7708, 7709, 4464, 7710, 4465, 2565, 107, 2477, 2157, 3982,  # 6006
+    3460, 3147, 7711, 1533, 541, 1301, 158, 753, 4182, 2872, 3562, 7712, 1696, 370, 1088, 4183,  # 6022
+    4466, 3563, 579, 327, 440, 162, 2240, 269, 1937, 1374, 3461, 968, 3043, 56, 1396, 3090,  # 6038
+    2106, 3288, 3354, 7713, 1926, 2158, 4467, 2998, 7714, 3564, 7715, 7716, 3677, 4468, 2478, 7717,  # 6054
+    2791, 7718, 1650, 4469, 7719, 2603, 7720, 7721, 3983, 2661, 3355, 1149, 3356, 3984, 3805, 3985,  # 6070
+    7722, 1076, 49, 7723, 951, 3211, 3289, 3290, 450, 2837, 920, 7724, 1811, 2792, 2366, 4184,  # 6086
+    1908, 1138, 2367, 3806, 3462, 7725, 3212, 4470, 1909, 1147, 1518, 2423, 4471, 3807, 7726, 4472,  # 6102
+    2388, 2604, 260, 1795, 3213, 7727, 7728, 3808, 3291, 708, 7729, 3565, 1704, 7730, 3566, 1351,  # 6118
+    1618, 3357, 2999, 1886, 944, 4185, 3358, 4186, 3044, 3359, 4187, 7731, 3678, 422, 413, 1714,  # 6134
+    3292, 500, 2058, 2345, 4188, 2479, 7732, 1344, 1910, 954, 7733, 1668, 7734, 7735, 3986, 2404,  # 6150
+    4189, 3567, 3809, 4190, 7736, 2302, 1318, 2505, 3091, 133, 3092, 2873, 4473, 629, 31, 2838,  # 6166
+    2697, 3810, 4474, 850, 949, 4475, 3987, 2955, 1732, 2088, 4191, 1496, 1852, 7737, 3988, 620,  # 6182
+    3214, 981, 1242, 3679, 3360, 1619, 3680, 1643, 3293, 2139, 2452, 1970, 1719, 3463, 2168, 7738,  # 6198
+    3215, 7739, 7740, 3361, 1828, 7741, 1277, 4476, 1565, 2047, 7742, 1636, 3568, 3093, 7743, 869,  # 6214
+    2839, 655, 3811, 3812, 3094, 3989, 3000, 3813, 1310, 3569, 4477, 7744, 7745, 7746, 1733, 558,  # 6230
+    4478, 3681, 335, 1549, 3045, 1756, 4192, 3682, 1945, 3464, 1829, 1291, 1192, 470, 2726, 2107,  # 6246
+    2793, 913, 1054, 3990, 7747, 1027, 7748, 3046, 3991, 4479, 982, 2662, 3362, 3148, 3465, 3216,  # 6262
+    3217, 1946, 2794, 7749, 571, 4480, 7750, 1830, 7751, 3570, 2583, 1523, 2424, 7752, 2089, 984,  # 6278
+    4481, 3683, 1959, 7753, 3684, 852, 923, 2795, 3466, 3685, 969, 1519, 999, 2048, 2320, 1705,  # 6294
+    7754, 3095, 615, 1662, 151, 597, 3992, 2405, 2321, 1049, 275, 4482, 3686, 4193, 568, 3687,  # 6310
+    3571, 2480, 4194, 3688, 7755, 2425, 2270, 409, 3218, 7756, 1566, 2874, 3467, 1002, 769, 2840,  # 6326
+    194, 2090, 3149, 3689, 2222, 3294, 4195, 628, 1505, 7757, 7758, 1763, 2177, 3001, 3993, 521,  # 6342
+    1161, 2584, 1787, 2203, 2406, 4483, 3994, 1625, 4196, 4197, 412, 42, 3096, 464, 7759, 2632,  # 6358
+    4484, 3363, 1760, 1571, 2875, 3468, 2530, 1219, 2204, 3814, 2633, 2140, 2368, 4485, 4486, 3295,  # 6374
+    1651, 3364, 3572, 7760, 7761, 3573, 2481, 3469, 7762, 3690, 7763, 7764, 2271, 2091, 460, 7765,  # 6390
+    4487, 7766, 3002, 962, 588, 3574, 289, 3219, 2634, 1116, 52, 7767, 3047, 1796, 7768, 7769,  # 6406
+    7770, 1467, 7771, 1598, 1143, 3691, 4198, 1984, 1734, 1067, 4488, 1280, 3365, 465, 4489, 1572,  # 6422
+    510, 7772, 1927, 2241, 1812, 1644, 3575, 7773, 4490, 3692, 7774, 7775, 2663, 1573, 1534, 7776,  # 6438
+    7777, 4199, 536, 1807, 1761, 3470, 3815, 3150, 2635, 7778, 7779, 7780, 4491, 3471, 2915, 1911,  # 6454
+    2796, 7781, 3296, 1122, 377, 3220, 7782, 360, 7783, 7784, 4200, 1529, 551, 7785, 2059, 3693,  # 6470
+    1769, 2426, 7786, 2916, 4201, 3297, 3097, 2322, 2108, 2030, 4492, 1404, 136, 1468, 1479, 672,  # 6486
+    1171, 3221, 2303, 271, 3151, 7787, 2762, 7788, 2049, 678, 2727, 865, 1947, 4493, 7789, 2013,  # 6502
+    3995, 2956, 7790, 2728, 2223, 1397, 3048, 3694, 4494, 4495, 1735, 2917, 3366, 3576, 7791, 3816,  # 6518
+    509, 2841, 2453, 2876, 3817, 7792, 7793, 3152, 3153, 4496, 4202, 2531, 4497, 2304, 1166, 1010,  # 6534
+    552, 681, 1887, 7794, 7795, 2957, 2958, 3996, 1287, 1596, 1861, 3154, 358, 453, 736, 175,  # 6550
+    478, 1117, 905, 1167, 1097, 7796, 1853, 1530, 7797, 1706, 7798, 2178, 3472, 2287, 3695, 3473,  # 6566
+    3577, 4203, 2092, 4204, 7799, 3367, 1193, 2482, 4205, 1458, 2190, 2205, 1862, 1888, 1421, 3298,  # 6582
+    2918, 3049, 2179, 3474, 595, 2122, 7800, 3997, 7801, 7802, 4206, 1707, 2636, 223, 3696, 1359,  # 6598
+    751, 3098, 183, 3475, 7803, 2797, 3003, 419, 2369, 633, 704, 3818, 2389, 241, 7804, 7805,  # 6614
+    7806, 838, 3004, 3697, 2272, 2763, 2454, 3819, 1938, 2050, 3998, 1309, 3099, 2242, 1181, 7807,  # 6630
+    1136, 2206, 3820, 2370, 1446, 4207, 2305, 4498, 7808, 7809, 4208, 1055, 2605, 484, 3698, 7810,  # 6646
+    3999, 625, 4209, 2273, 3368, 1499, 4210, 4000, 7811, 4001, 4211, 3222, 2274, 2275, 3476, 7812,  # 6662
+    7813, 2764, 808, 2606, 3699, 3369, 4002, 4212, 3100, 2532, 526, 3370, 3821, 4213, 955, 7814,  # 6678
+    1620, 4214, 2637, 2427, 7815, 1429, 3700, 1669, 1831, 994, 928, 7816, 3578, 1260, 7817, 7818,  # 6694
+    7819, 1948, 2288, 741, 2919, 1626, 4215, 2729, 2455, 867, 1184, 362, 3371, 1392, 7820, 7821,  # 6710
+    4003, 4216, 1770, 1736, 3223, 2920, 4499, 4500, 1928, 2698, 1459, 1158, 7822, 3050, 3372, 2877,  # 6726
+    1292, 1929, 2506, 2842, 3701, 1985, 1187, 2071, 2014, 2607, 4217, 7823, 2566, 2507, 2169, 3702,  # 6742
+    2483, 3299, 7824, 3703, 4501, 7825, 7826, 666, 1003, 3005, 1022, 3579, 4218, 7827, 4502, 1813,  # 6758
+    2253, 574, 3822, 1603, 295, 1535, 705, 3823, 4219, 283, 858, 417, 7828, 7829, 3224, 4503,  # 6774
+    4504, 3051, 1220, 1889, 1046, 2276, 2456, 4004, 1393, 1599, 689, 2567, 388, 4220, 7830, 2484,  # 6790
+    802, 7831, 2798, 3824, 2060, 1405, 2254, 7832, 4505, 3825, 2109, 1052, 1345, 3225, 1585, 7833,  # 6806
+    809, 7834, 7835, 7836, 575, 2730, 3477, 956, 1552, 1469, 1144, 2323, 7837, 2324, 1560, 2457,  # 6822
+    3580, 3226, 4005, 616, 2207, 3155, 2180, 2289, 7838, 1832, 7839, 3478, 4506, 7840, 1319, 3704,  # 6838
+    3705, 1211, 3581, 1023, 3227, 1293, 2799, 7841, 7842, 7843, 3826, 607, 2306, 3827, 762, 2878,  # 6854
+    1439, 4221, 1360, 7844, 1485, 3052, 7845, 4507, 1038, 4222, 1450, 2061, 2638, 4223, 1379, 4508,  # 6870
+    2585, 7846, 7847, 4224, 1352, 1414, 2325, 2921, 1172, 7848, 7849, 3828, 3829, 7850, 1797, 1451,  # 6886
+    7851, 7852, 7853, 7854, 2922, 4006, 4007, 2485, 2346, 411, 4008, 4009, 3582, 3300, 3101, 4509,  # 6902
+    1561, 2664, 1452, 4010, 1375, 7855, 7856, 47, 2959, 316, 7857, 1406, 1591, 2923, 3156, 7858,  # 6918
+    1025, 2141, 3102, 3157, 354, 2731, 884, 2224, 4225, 2407, 508, 3706, 726, 3583, 996, 2428,  # 6934
+    3584, 729, 7859, 392, 2191, 1453, 4011, 4510, 3707, 7860, 7861, 2458, 3585, 2608, 1675, 2800,  # 6950
+    919, 2347, 2960, 2348, 1270, 4511, 4012, 73, 7862, 7863, 647, 7864, 3228, 2843, 2255, 1550,  # 6966
+    1346, 3006, 7865, 1332, 883, 3479, 7866, 7867, 7868, 7869, 3301, 2765, 7870, 1212, 831, 1347,  # 6982
+    4226, 4512, 2326, 3830, 1863, 3053, 720, 3831, 4513, 4514, 3832, 7871, 4227, 7872, 7873, 4515,  # 6998
+    7874, 7875, 1798, 4516, 3708, 2609, 4517, 3586, 1645, 2371, 7876, 7877, 2924, 669, 2208, 2665,  # 7014
+    2429, 7878, 2879, 7879, 7880, 1028, 3229, 7881, 4228, 2408, 7882, 2256, 1353, 7883, 7884, 4518,  # 7030
+    3158, 518, 7885, 4013, 7886, 4229, 1960, 7887, 2142, 4230, 7888, 7889, 3007, 2349, 2350, 3833,  # 7046
+    516, 1833, 1454, 4014, 2699, 4231, 4519, 2225, 2610, 1971, 1129, 3587, 7890, 2766, 7891, 2961,  # 7062
+    1422, 577, 1470, 3008, 1524, 3373, 7892, 7893, 432, 4232, 3054, 3480, 7894, 2586, 1455, 2508,  # 7078
+    2226, 1972, 1175, 7895, 1020, 2732, 4015, 3481, 4520, 7896, 2733, 7897, 1743, 1361, 3055, 3482,  # 7094
+    2639, 4016, 4233, 4521, 2290, 895, 924, 4234, 2170, 331, 2243, 3056, 166, 1627, 3057, 1098,  # 7110
+    7898, 1232, 2880, 2227, 3374, 4522, 657, 403, 1196, 2372, 542, 3709, 3375, 1600, 4235, 3483,  # 7126
+    7899, 4523, 2767, 3230, 576, 530, 1362, 7900, 4524, 2533, 2666, 3710, 4017, 7901, 842, 3834,  # 7142
+    7902, 2801, 2031, 1014, 4018, 213, 2700, 3376, 665, 621, 4236, 7903, 3711, 2925, 2430, 7904,  # 7158
+    2431, 3302, 3588, 3377, 7905, 4237, 2534, 4238, 4525, 3589, 1682, 4239, 3484, 1380, 7906, 724,  # 7174
+    2277, 600, 1670, 7907, 1337, 1233, 4526, 3103, 2244, 7908, 1621, 4527, 7909, 651, 4240, 7910,  # 7190
+    1612, 4241, 2611, 7911, 2844, 7912, 2734, 2307, 3058, 7913, 716, 2459, 3059, 174, 1255, 2701,  # 7206
+    4019, 3590, 548, 1320, 1398, 728, 4020, 1574, 7914, 1890, 1197, 3060, 4021, 7915, 3061, 3062,  # 7222
+    3712, 3591, 3713, 747, 7916, 635, 4242, 4528, 7917, 7918, 7919, 4243, 7920, 7921, 4529, 7922,  # 7238
+    3378, 4530, 2432, 451, 7923, 3714, 2535, 2072, 4244, 2735, 4245, 4022, 7924, 1764, 4531, 7925,  # 7254
+    4246, 350, 7926, 2278, 2390, 2486, 7927, 4247, 4023, 2245, 1434, 4024, 488, 4532, 458, 4248,  # 7270
+    4025, 3715, 771, 1330, 2391, 3835, 2568, 3159, 2159, 2409, 1553, 2667, 3160, 4249, 7928, 2487,  # 7286
+    2881, 2612, 1720, 2702, 4250, 3379, 4533, 7929, 2536, 4251, 7930, 3231, 4252, 2768, 7931, 2015,  # 7302
+    2736, 7932, 1155, 1017, 3716, 3836, 7933, 3303, 2308, 201, 1864, 4253, 1430, 7934, 4026, 7935,  # 7318
+    7936, 7937, 7938, 7939, 4254, 1604, 7940, 414, 1865, 371, 2587, 4534, 4535, 3485, 2016, 3104,  # 7334
+    4536, 1708, 960, 4255, 887, 389, 2171, 1536, 1663, 1721, 7941, 2228, 4027, 2351, 2926, 1580,  # 7350
+    7942, 7943, 7944, 1744, 7945, 2537, 4537, 4538, 7946, 4539, 7947, 2073, 7948, 7949, 3592, 3380,  # 7366
+    2882, 4256, 7950, 4257, 2640, 3381, 2802, 673, 2703, 2460, 709, 3486, 4028, 3593, 4258, 7951,  # 7382
+    1148, 502, 634, 7952, 7953, 1204, 4540, 3594, 1575, 4541, 2613, 3717, 7954, 3718, 3105, 948,  # 7398
+    3232, 121, 1745, 3837, 1110, 7955, 4259, 3063, 2509, 3009, 4029, 3719, 1151, 1771, 3838, 1488,  # 7414
+    4030, 1986, 7956, 2433, 3487, 7957, 7958, 2093, 7959, 4260, 3839, 1213, 1407, 2803, 531, 2737,  # 7430
+    2538, 3233, 1011, 1537, 7960, 2769, 4261, 3106, 1061, 7961, 3720, 3721, 1866, 2883, 7962, 2017,  # 7446
+    120, 4262, 4263, 2062, 3595, 3234, 2309, 3840, 2668, 3382, 1954, 4542, 7963, 7964, 3488, 1047,  # 7462
+    2704, 1266, 7965, 1368, 4543, 2845, 649, 3383, 3841, 2539, 2738, 1102, 2846, 2669, 7966, 7967,  # 7478
+    1999, 7968, 1111, 3596, 2962, 7969, 2488, 3842, 3597, 2804, 1854, 3384, 3722, 7970, 7971, 3385,  # 7494
+    2410, 2884, 3304, 3235, 3598, 7972, 2569, 7973, 3599, 2805, 4031, 1460, 856, 7974, 3600, 7975,  # 7510
+    2885, 2963, 7976, 2886, 3843, 7977, 4264, 632, 2510, 875, 3844, 1697, 3845, 2291, 7978, 7979,  # 7526
+    4544, 3010, 1239, 580, 4545, 4265, 7980, 914, 936, 2074, 1190, 4032, 1039, 2123, 7981, 7982,  # 7542
+    7983, 3386, 1473, 7984, 1354, 4266, 3846, 7985, 2172, 3064, 4033, 915, 3305, 4267, 4268, 3306,  # 7558
+    1605, 1834, 7986, 2739, 398, 3601, 4269, 3847, 4034, 328, 1912, 2847, 4035, 3848, 1331, 4270,  # 7574
+    3011, 937, 4271, 7987, 3602, 4036, 4037, 3387, 2160, 4546, 3388, 524, 742, 538, 3065, 1012,  # 7590
+    7988, 7989, 3849, 2461, 7990, 658, 1103, 225, 3850, 7991, 7992, 4547, 7993, 4548, 7994, 3236,  # 7606
+    1243, 7995, 4038, 963, 2246, 4549, 7996, 2705, 3603, 3161, 7997, 7998, 2588, 2327, 7999, 4550,  # 7622
+    8000, 8001, 8002, 3489, 3307, 957, 3389, 2540, 2032, 1930, 2927, 2462, 870, 2018, 3604, 1746,  # 7638
+    2770, 2771, 2434, 2463, 8003, 3851, 8004, 3723, 3107, 3724, 3490, 3390, 3725, 8005, 1179, 3066,  # 7654
+    8006, 3162, 2373, 4272, 3726, 2541, 3163, 3108, 2740, 4039, 8007, 3391, 1556, 2542, 2292, 977,  # 7670
+    2887, 2033, 4040, 1205, 3392, 8008, 1765, 3393, 3164, 2124, 1271, 1689, 714, 4551, 3491, 8009,  # 7686
+    2328, 3852, 533, 4273, 3605, 2181, 617, 8010, 2464, 3308, 3492, 2310, 8011, 8012, 3165, 8013,  # 7702
+    8014, 3853, 1987, 618, 427, 2641, 3493, 3394, 8015, 8016, 1244, 1690, 8017, 2806, 4274, 4552,  # 7718
+    8018, 3494, 8019, 8020, 2279, 1576, 473, 3606, 4275, 3395, 972, 8021, 3607, 8022, 3067, 8023,  # 7734
+    8024, 4553, 4554, 8025, 3727, 4041, 4042, 8026, 153, 4555, 356, 8027, 1891, 2888, 4276, 2143,  # 7750
+    408, 803, 2352, 8028, 3854, 8029, 4277, 1646, 2570, 2511, 4556, 4557, 3855, 8030, 3856, 4278,  # 7766
+    8031, 2411, 3396, 752, 8032, 8033, 1961, 2964, 8034, 746, 3012, 2465, 8035, 4279, 3728, 698,  # 7782
+    4558, 1892, 4280, 3608, 2543, 4559, 3609, 3857, 8036, 3166, 3397, 8037, 1823, 1302, 4043, 2706,  # 7798
+    3858, 1973, 4281, 8038, 4282, 3167, 823, 1303, 1288, 1236, 2848, 3495, 4044, 3398, 774, 3859,  # 7814
+    8039, 1581, 4560, 1304, 2849, 3860, 4561, 8040, 2435, 2161, 1083, 3237, 4283, 4045, 4284, 344,  # 7830
+    1173, 288, 2311, 454, 1683, 8041, 8042, 1461, 4562, 4046, 2589, 8043, 8044, 4563, 985, 894,  # 7846
+    8045, 3399, 3168, 8046, 1913, 2928, 3729, 1988, 8047, 2110, 1974, 8048, 4047, 8049, 2571, 1194,  # 7862
+    425, 8050, 4564, 3169, 1245, 3730, 4285, 8051, 8052, 2850, 8053, 636, 4565, 1855, 3861, 760,  # 7878
+    1799, 8054, 4286, 2209, 1508, 4566, 4048, 1893, 1684, 2293, 8055, 8056, 8057, 4287, 4288, 2210,  # 7894
+    479, 8058, 8059, 832, 8060, 4049, 2489, 8061, 2965, 2490, 3731, 990, 3109, 627, 1814, 2642,  # 7910
+    4289, 1582, 4290, 2125, 2111, 3496, 4567, 8062, 799, 4291, 3170, 8063, 4568, 2112, 1737, 3013,  # 7926
+    1018, 543, 754, 4292, 3309, 1676, 4569, 4570, 4050, 8064, 1489, 8065, 3497, 8066, 2614, 2889,  # 7942
+    4051, 8067, 8068, 2966, 8069, 8070, 8071, 8072, 3171, 4571, 4572, 2182, 1722, 8073, 3238, 3239,  # 7958
+    1842, 3610, 1715, 481, 365, 1975, 1856, 8074, 8075, 1962, 2491, 4573, 8076, 2126, 3611, 3240,  # 7974
+    433, 1894, 2063, 2075, 8077, 602, 2741, 8078, 8079, 8080, 8081, 8082, 3014, 1628, 3400, 8083,  # 7990
+    3172, 4574, 4052, 2890, 4575, 2512, 8084, 2544, 2772, 8085, 8086, 8087, 3310, 4576, 2891, 8088,  # 8006
+    4577, 8089, 2851, 4578, 4579, 1221, 2967, 4053, 2513, 8090, 8091, 8092, 1867, 1989, 8093, 8094,  # 8022
+    8095, 1895, 8096, 8097, 4580, 1896, 4054, 318, 8098, 2094, 4055, 4293, 8099, 8100, 485, 8101,  # 8038
+    938, 3862, 553, 2670, 116, 8102, 3863, 3612, 8103, 3498, 2671, 2773, 3401, 3311, 2807, 8104,  # 8054
+    3613, 2929, 4056, 1747, 2930, 2968, 8105, 8106, 207, 8107, 8108, 2672, 4581, 2514, 8109, 3015,  # 8070
+    890, 3614, 3864, 8110, 1877, 3732, 3402, 8111, 2183, 2353, 3403, 1652, 8112, 8113, 8114, 941,  # 8086
+    2294, 208, 3499, 4057, 2019, 330, 4294, 3865, 2892, 2492, 3733, 4295, 8115, 8116, 8117, 8118,  # 8102
+)
+# fmt: on
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwprober.py
new file mode 100644
index 0000000..ca10a23
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/euctwprober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import EUCTWDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import EUCTW_SM_MODEL
+
+
+class EUCTWProber(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(EUCTW_SM_MODEL)
+        self.distribution_analyzer = EUCTWDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "EUC-TW"
+
+    @property
+    def language(self):
+        return "Taiwan"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312freq.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312freq.py
new file mode 100644
index 0000000..b32bfc7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312freq.py
@@ -0,0 +1,284 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# GB2312 most frequently used character table
+#
+# Char to FreqOrder table , from hz6763
+
+# 512  --> 0.79  -- 0.79
+# 1024 --> 0.92  -- 0.13
+# 2048 --> 0.98  -- 0.06
+# 6768 --> 1.00  -- 0.02
+#
+# Ideal Distribution Ratio = 0.79135/(1-0.79135) = 3.79
+# Random Distribution Ration = 512 / (3755 - 512) = 0.157
+#
+# Typical Distribution Ratio about 25% of Ideal one, still much higher that RDR
+
+GB2312_TYPICAL_DISTRIBUTION_RATIO = 0.9
+
+GB2312_TABLE_SIZE = 3760
+
+# fmt: off
+GB2312_CHAR_TO_FREQ_ORDER = (
+1671, 749,1443,2364,3924,3807,2330,3921,1704,3463,2691,1511,1515, 572,3191,2205,
+2361, 224,2558, 479,1711, 963,3162, 440,4060,1905,2966,2947,3580,2647,3961,3842,
+2204, 869,4207, 970,2678,5626,2944,2956,1479,4048, 514,3595, 588,1346,2820,3409,
+ 249,4088,1746,1873,2047,1774, 581,1813, 358,1174,3590,1014,1561,4844,2245, 670,
+1636,3112, 889,1286, 953, 556,2327,3060,1290,3141, 613, 185,3477,1367, 850,3820,
+1715,2428,2642,2303,2732,3041,2562,2648,3566,3946,1349, 388,3098,2091,1360,3585,
+ 152,1687,1539, 738,1559,  59,1232,2925,2267,1388,1249,1741,1679,2960, 151,1566,
+1125,1352,4271, 924,4296, 385,3166,4459, 310,1245,2850,  70,3285,2729,3534,3575,
+2398,3298,3466,1960,2265, 217,3647, 864,1909,2084,4401,2773,1010,3269,5152, 853,
+3051,3121,1244,4251,1895, 364,1499,1540,2313,1180,3655,2268, 562, 715,2417,3061,
+ 544, 336,3768,2380,1752,4075, 950, 280,2425,4382, 183,2759,3272, 333,4297,2155,
+1688,2356,1444,1039,4540, 736,1177,3349,2443,2368,2144,2225, 565, 196,1482,3406,
+ 927,1335,4147, 692, 878,1311,1653,3911,3622,1378,4200,1840,2969,3149,2126,1816,
+2534,1546,2393,2760, 737,2494,  13, 447, 245,2747,  38,2765,2129,2589,1079, 606,
+ 360, 471,3755,2890, 404, 848, 699,1785,1236, 370,2221,1023,3746,2074,2026,2023,
+2388,1581,2119, 812,1141,3091,2536,1519, 804,2053, 406,1596,1090, 784, 548,4414,
+1806,2264,2936,1100, 343,4114,5096, 622,3358, 743,3668,1510,1626,5020,3567,2513,
+3195,4115,5627,2489,2991,  24,2065,2697,1087,2719,  48,1634, 315,  68, 985,2052,
+ 198,2239,1347,1107,1439, 597,2366,2172, 871,3307, 919,2487,2790,1867, 236,2570,
+1413,3794, 906,3365,3381,1701,1982,1818,1524,2924,1205, 616,2586,2072,2004, 575,
+ 253,3099,  32,1365,1182, 197,1714,2454,1201, 554,3388,3224,2748, 756,2587, 250,
+2567,1507,1517,3529,1922,2761,2337,3416,1961,1677,2452,2238,3153, 615, 911,1506,
+1474,2495,1265,1906,2749,3756,3280,2161, 898,2714,1759,3450,2243,2444, 563,  26,
+3286,2266,3769,3344,2707,3677, 611,1402, 531,1028,2871,4548,1375, 261,2948, 835,
+1190,4134, 353, 840,2684,1900,3082,1435,2109,1207,1674, 329,1872,2781,4055,2686,
+2104, 608,3318,2423,2957,2768,1108,3739,3512,3271,3985,2203,1771,3520,1418,2054,
+1681,1153, 225,1627,2929, 162,2050,2511,3687,1954, 124,1859,2431,1684,3032,2894,
+ 585,4805,3969,2869,2704,2088,2032,2095,3656,2635,4362,2209, 256, 518,2042,2105,
+3777,3657, 643,2298,1148,1779, 190, 989,3544, 414,  11,2135,2063,2979,1471, 403,
+3678, 126, 770,1563, 671,2499,3216,2877, 600,1179, 307,2805,4937,1268,1297,2694,
+ 252,4032,1448,1494,1331,1394, 127,2256, 222,1647,1035,1481,3056,1915,1048, 873,
+3651, 210,  33,1608,2516, 200,1520, 415, 102,   0,3389,1287, 817,  91,3299,2940,
+ 836,1814, 549,2197,1396,1669,2987,3582,2297,2848,4528,1070, 687,  20,1819, 121,
+1552,1364,1461,1968,2617,3540,2824,2083, 177, 948,4938,2291, 110,4549,2066, 648,
+3359,1755,2110,2114,4642,4845,1693,3937,3308,1257,1869,2123, 208,1804,3159,2992,
+2531,2549,3361,2418,1350,2347,2800,2568,1291,2036,2680,  72, 842,1990, 212,1233,
+1154,1586,  75,2027,3410,4900,1823,1337,2710,2676, 728,2810,1522,3026,4995, 157,
+ 755,1050,4022, 710, 785,1936,2194,2085,1406,2777,2400, 150,1250,4049,1206, 807,
+1910, 534, 529,3309,1721,1660, 274,  39,2827, 661,2670,1578, 925,3248,3815,1094,
+4278,4901,4252,  41,1150,3747,2572,2227,4501,3658,4902,3813,3357,3617,2884,2258,
+ 887, 538,4187,3199,1294,2439,3042,2329,2343,2497,1255, 107, 543,1527, 521,3478,
+3568, 194,5062,  15, 961,3870,1241,1192,2664,  66,5215,3260,2111,1295,1127,2152,
+3805,4135, 901,1164,1976, 398,1278, 530,1460, 748, 904,1054,1966,1426,  53,2909,
+ 509, 523,2279,1534, 536,1019, 239,1685, 460,2353, 673,1065,2401,3600,4298,2272,
+1272,2363, 284,1753,3679,4064,1695,  81, 815,2677,2757,2731,1386, 859, 500,4221,
+2190,2566, 757,1006,2519,2068,1166,1455, 337,2654,3203,1863,1682,1914,3025,1252,
+1409,1366, 847, 714,2834,2038,3209, 964,2970,1901, 885,2553,1078,1756,3049, 301,
+1572,3326, 688,2130,1996,2429,1805,1648,2930,3421,2750,3652,3088, 262,1158,1254,
+ 389,1641,1812, 526,1719, 923,2073,1073,1902, 468, 489,4625,1140, 857,2375,3070,
+3319,2863, 380, 116,1328,2693,1161,2244, 273,1212,1884,2769,3011,1775,1142, 461,
+3066,1200,2147,2212, 790, 702,2695,4222,1601,1058, 434,2338,5153,3640,  67,2360,
+4099,2502, 618,3472,1329, 416,1132, 830,2782,1807,2653,3211,3510,1662, 192,2124,
+ 296,3979,1739,1611,3684,  23, 118, 324, 446,1239,1225, 293,2520,3814,3795,2535,
+3116,  17,1074, 467,2692,2201, 387,2922,  45,1326,3055,1645,3659,2817, 958, 243,
+1903,2320,1339,2825,1784,3289, 356, 576, 865,2315,2381,3377,3916,1088,3122,1713,
+1655, 935, 628,4689,1034,1327, 441, 800, 720, 894,1979,2183,1528,5289,2702,1071,
+4046,3572,2399,1571,3281,  79, 761,1103, 327, 134, 758,1899,1371,1615, 879, 442,
+ 215,2605,2579, 173,2048,2485,1057,2975,3317,1097,2253,3801,4263,1403,1650,2946,
+ 814,4968,3487,1548,2644,1567,1285,   2, 295,2636,  97, 946,3576, 832, 141,4257,
+3273, 760,3821,3521,3156,2607, 949,1024,1733,1516,1803,1920,2125,2283,2665,3180,
+1501,2064,3560,2171,1592, 803,3518,1416, 732,3897,4258,1363,1362,2458, 119,1427,
+ 602,1525,2608,1605,1639,3175, 694,3064,  10, 465,  76,2000,4846,4208, 444,3781,
+1619,3353,2206,1273,3796, 740,2483, 320,1723,2377,3660,2619,1359,1137,1762,1724,
+2345,2842,1850,1862, 912, 821,1866, 612,2625,1735,2573,3369,1093, 844,  89, 937,
+ 930,1424,3564,2413,2972,1004,3046,3019,2011, 711,3171,1452,4178, 428, 801,1943,
+ 432, 445,2811, 206,4136,1472, 730, 349,  73, 397,2802,2547, 998,1637,1167, 789,
+ 396,3217, 154,1218, 716,1120,1780,2819,4826,1931,3334,3762,2139,1215,2627, 552,
+3664,3628,3232,1405,2383,3111,1356,2652,3577,3320,3101,1703, 640,1045,1370,1246,
+4996, 371,1575,2436,1621,2210, 984,4033,1734,2638,  16,4529, 663,2755,3255,1451,
+3917,2257,1253,1955,2234,1263,2951, 214,1229, 617, 485, 359,1831,1969, 473,2310,
+ 750,2058, 165,  80,2864,2419, 361,4344,2416,2479,1134, 796,3726,1266,2943, 860,
+2715, 938, 390,2734,1313,1384, 248, 202, 877,1064,2854, 522,3907, 279,1602, 297,
+2357, 395,3740, 137,2075, 944,4089,2584,1267,3802,  62,1533,2285, 178, 176, 780,
+2440, 201,3707, 590, 478,1560,4354,2117,1075,  30,  74,4643,4004,1635,1441,2745,
+ 776,2596, 238,1077,1692,1912,2844, 605, 499,1742,3947, 241,3053, 980,1749, 936,
+2640,4511,2582, 515,1543,2162,5322,2892,2993, 890,2148,1924, 665,1827,3581,1032,
+ 968,3163, 339,1044,1896, 270, 583,1791,1720,4367,1194,3488,3669,  43,2523,1657,
+ 163,2167, 290,1209,1622,3378, 550, 634,2508,2510, 695,2634,2384,2512,1476,1414,
+ 220,1469,2341,2138,2852,3183,2900,4939,2865,3502,1211,3680, 854,3227,1299,2976,
+3172, 186,2998,1459, 443,1067,3251,1495, 321,1932,3054, 909, 753,1410,1828, 436,
+2441,1119,1587,3164,2186,1258, 227, 231,1425,1890,3200,3942, 247, 959, 725,5254,
+2741, 577,2158,2079, 929, 120, 174, 838,2813, 591,1115, 417,2024,  40,3240,1536,
+1037, 291,4151,2354, 632,1298,2406,2500,3535,1825,1846,3451, 205,1171, 345,4238,
+  18,1163, 811, 685,2208,1217, 425,1312,1508,1175,4308,2552,1033, 587,1381,3059,
+2984,3482, 340,1316,4023,3972, 792,3176, 519, 777,4690, 918, 933,4130,2981,3741,
+  90,3360,2911,2200,5184,4550, 609,3079,2030, 272,3379,2736, 363,3881,1130,1447,
+ 286, 779, 357,1169,3350,3137,1630,1220,2687,2391, 747,1277,3688,2618,2682,2601,
+1156,3196,5290,4034,3102,1689,3596,3128, 874, 219,2783, 798, 508,1843,2461, 269,
+1658,1776,1392,1913,2983,3287,2866,2159,2372, 829,4076,  46,4253,2873,1889,1894,
+ 915,1834,1631,2181,2318, 298, 664,2818,3555,2735, 954,3228,3117, 527,3511,2173,
+ 681,2712,3033,2247,2346,3467,1652, 155,2164,3382, 113,1994, 450, 899, 494, 994,
+1237,2958,1875,2336,1926,3727, 545,1577,1550, 633,3473, 204,1305,3072,2410,1956,
+2471, 707,2134, 841,2195,2196,2663,3843,1026,4940, 990,3252,4997, 368,1092, 437,
+3212,3258,1933,1829, 675,2977,2893, 412, 943,3723,4644,3294,3283,2230,2373,5154,
+2389,2241,2661,2323,1404,2524, 593, 787, 677,3008,1275,2059, 438,2709,2609,2240,
+2269,2246,1446,  36,1568,1373,3892,1574,2301,1456,3962, 693,2276,5216,2035,1143,
+2720,1919,1797,1811,2763,4137,2597,1830,1699,1488,1198,2090, 424,1694, 312,3634,
+3390,4179,3335,2252,1214, 561,1059,3243,2295,2561, 975,5155,2321,2751,3772, 472,
+1537,3282,3398,1047,2077,2348,2878,1323,3340,3076, 690,2906,  51, 369, 170,3541,
+1060,2187,2688,3670,2541,1083,1683, 928,3918, 459, 109,4427, 599,3744,4286, 143,
+2101,2730,2490,  82,1588,3036,2121, 281,1860, 477,4035,1238,2812,3020,2716,3312,
+1530,2188,2055,1317, 843, 636,1808,1173,3495, 649, 181,1002, 147,3641,1159,2414,
+3750,2289,2795, 813,3123,2610,1136,4368,   5,3391,4541,2174, 420, 429,1728, 754,
+1228,2115,2219, 347,2223,2733, 735,1518,3003,2355,3134,1764,3948,3329,1888,2424,
+1001,1234,1972,3321,3363,1672,1021,1450,1584, 226, 765, 655,2526,3404,3244,2302,
+3665, 731, 594,2184, 319,1576, 621, 658,2656,4299,2099,3864,1279,2071,2598,2739,
+ 795,3086,3699,3908,1707,2352,2402,1382,3136,2475,1465,4847,3496,3865,1085,3004,
+2591,1084, 213,2287,1963,3565,2250, 822, 793,4574,3187,1772,1789,3050, 595,1484,
+1959,2770,1080,2650, 456, 422,2996, 940,3322,4328,4345,3092,2742, 965,2784, 739,
+4124, 952,1358,2498,2949,2565, 332,2698,2378, 660,2260,2473,4194,3856,2919, 535,
+1260,2651,1208,1428,1300,1949,1303,2942, 433,2455,2450,1251,1946, 614,1269, 641,
+1306,1810,2737,3078,2912, 564,2365,1419,1415,1497,4460,2367,2185,1379,3005,1307,
+3218,2175,1897,3063, 682,1157,4040,4005,1712,1160,1941,1399, 394, 402,2952,1573,
+1151,2986,2404, 862, 299,2033,1489,3006, 346, 171,2886,3401,1726,2932, 168,2533,
+  47,2507,1030,3735,1145,3370,1395,1318,1579,3609,4560,2857,4116,1457,2529,1965,
+ 504,1036,2690,2988,2405, 745,5871, 849,2397,2056,3081, 863,2359,3857,2096,  99,
+1397,1769,2300,4428,1643,3455,1978,1757,3718,1440,  35,4879,3742,1296,4228,2280,
+ 160,5063,1599,2013, 166, 520,3479,1646,3345,3012, 490,1937,1545,1264,2182,2505,
+1096,1188,1369,1436,2421,1667,2792,2460,1270,2122, 727,3167,2143, 806,1706,1012,
+1800,3037, 960,2218,1882, 805, 139,2456,1139,1521, 851,1052,3093,3089, 342,2039,
+ 744,5097,1468,1502,1585,2087, 223, 939, 326,2140,2577, 892,2481,1623,4077, 982,
+3708, 135,2131,  87,2503,3114,2326,1106, 876,1616, 547,2997,2831,2093,3441,4530,
+4314,   9,3256,4229,4148, 659,1462,1986,1710,2046,2913,2231,4090,4880,5255,3392,
+3274,1368,3689,4645,1477, 705,3384,3635,1068,1529,2941,1458,3782,1509, 100,1656,
+2548, 718,2339, 408,1590,2780,3548,1838,4117,3719,1345,3530, 717,3442,2778,3220,
+2898,1892,4590,3614,3371,2043,1998,1224,3483, 891, 635, 584,2559,3355, 733,1766,
+1729,1172,3789,1891,2307, 781,2982,2271,1957,1580,5773,2633,2005,4195,3097,1535,
+3213,1189,1934,5693,3262, 586,3118,1324,1598, 517,1564,2217,1868,1893,4445,3728,
+2703,3139,1526,1787,1992,3882,2875,1549,1199,1056,2224,1904,2711,5098,4287, 338,
+1993,3129,3489,2689,1809,2815,1997, 957,1855,3898,2550,3275,3057,1105,1319, 627,
+1505,1911,1883,3526, 698,3629,3456,1833,1431, 746,  77,1261,2017,2296,1977,1885,
+ 125,1334,1600, 525,1798,1109,2222,1470,1945, 559,2236,1186,3443,2476,1929,1411,
+2411,3135,1777,3372,2621,1841,1613,3229, 668,1430,1839,2643,2916, 195,1989,2671,
+2358,1387, 629,3205,2293,5256,4439, 123,1310, 888,1879,4300,3021,3605,1003,1162,
+3192,2910,2010, 140,2395,2859,  55,1082,2012,2901, 662, 419,2081,1438, 680,2774,
+4654,3912,1620,1731,1625,5035,4065,2328, 512,1344, 802,5443,2163,2311,2537, 524,
+3399,  98,1155,2103,1918,2606,3925,2816,1393,2465,1504,3773,2177,3963,1478,4346,
+ 180,1113,4655,3461,2028,1698, 833,2696,1235,1322,1594,4408,3623,3013,3225,2040,
+3022, 541,2881, 607,3632,2029,1665,1219, 639,1385,1686,1099,2803,3231,1938,3188,
+2858, 427, 676,2772,1168,2025, 454,3253,2486,3556, 230,1950, 580, 791,1991,1280,
+1086,1974,2034, 630, 257,3338,2788,4903,1017,  86,4790, 966,2789,1995,1696,1131,
+ 259,3095,4188,1308, 179,1463,5257, 289,4107,1248,  42,3413,1725,2288, 896,1947,
+ 774,4474,4254, 604,3430,4264, 392,2514,2588, 452, 237,1408,3018, 988,4531,1970,
+3034,3310, 540,2370,1562,1288,2990, 502,4765,1147,   4,1853,2708, 207, 294,2814,
+4078,2902,2509, 684,  34,3105,3532,2551, 644, 709,2801,2344, 573,1727,3573,3557,
+2021,1081,3100,4315,2100,3681, 199,2263,1837,2385, 146,3484,1195,2776,3949, 997,
+1939,3973,1008,1091,1202,1962,1847,1149,4209,5444,1076, 493, 117,5400,2521, 972,
+1490,2934,1796,4542,2374,1512,2933,2657, 413,2888,1135,2762,2314,2156,1355,2369,
+ 766,2007,2527,2170,3124,2491,2593,2632,4757,2437, 234,3125,3591,1898,1750,1376,
+1942,3468,3138, 570,2127,2145,3276,4131, 962, 132,1445,4196,  19, 941,3624,3480,
+3366,1973,1374,4461,3431,2629, 283,2415,2275, 808,2887,3620,2112,2563,1353,3610,
+ 955,1089,3103,1053,  96,  88,4097, 823,3808,1583, 399, 292,4091,3313, 421,1128,
+ 642,4006, 903,2539,1877,2082, 596,  29,4066,1790, 722,2157, 130, 995,1569, 769,
+1485, 464, 513,2213, 288,1923,1101,2453,4316, 133, 486,2445,  50, 625, 487,2207,
+  57, 423, 481,2962, 159,3729,1558, 491, 303, 482, 501, 240,2837, 112,3648,2392,
+1783, 362,   8,3433,3422, 610,2793,3277,1390,1284,1654,  21,3823, 734, 367, 623,
+ 193, 287, 374,1009,1483, 816, 476, 313,2255,2340,1262,2150,2899,1146,2581, 782,
+2116,1659,2018,1880, 255,3586,3314,1110,2867,2137,2564, 986,2767,5185,2006, 650,
+ 158, 926, 762, 881,3157,2717,2362,3587, 306,3690,3245,1542,3077,2427,1691,2478,
+2118,2985,3490,2438, 539,2305, 983, 129,1754, 355,4201,2386, 827,2923, 104,1773,
+2838,2771, 411,2905,3919, 376, 767, 122,1114, 828,2422,1817,3506, 266,3460,1007,
+1609,4998, 945,2612,4429,2274, 726,1247,1964,2914,2199,2070,4002,4108, 657,3323,
+1422, 579, 455,2764,4737,1222,2895,1670, 824,1223,1487,2525, 558, 861,3080, 598,
+2659,2515,1967, 752,2583,2376,2214,4180, 977, 704,2464,4999,2622,4109,1210,2961,
+ 819,1541, 142,2284,  44, 418, 457,1126,3730,4347,4626,1644,1876,3671,1864, 302,
+1063,5694, 624, 723,1984,3745,1314,1676,2488,1610,1449,3558,3569,2166,2098, 409,
+1011,2325,3704,2306, 818,1732,1383,1824,1844,3757, 999,2705,3497,1216,1423,2683,
+2426,2954,2501,2726,2229,1475,2554,5064,1971,1794,1666,2014,1343, 783, 724, 191,
+2434,1354,2220,5065,1763,2752,2472,4152, 131, 175,2885,3434,  92,1466,4920,2616,
+3871,3872,3866, 128,1551,1632, 669,1854,3682,4691,4125,1230, 188,2973,3290,1302,
+1213, 560,3266, 917, 763,3909,3249,1760, 868,1958, 764,1782,2097, 145,2277,3774,
+4462,  64,1491,3062, 971,2132,3606,2442, 221,1226,1617, 218, 323,1185,3207,3147,
+ 571, 619,1473,1005,1744,2281, 449,1887,2396,3685, 275, 375,3816,1743,3844,3731,
+ 845,1983,2350,4210,1377, 773, 967,3499,3052,3743,2725,4007,1697,1022,3943,1464,
+3264,2855,2722,1952,1029,2839,2467,  84,4383,2215, 820,1391,2015,2448,3672, 377,
+1948,2168, 797,2545,3536,2578,2645,  94,2874,1678, 405,1259,3071, 771, 546,1315,
+ 470,1243,3083, 895,2468, 981, 969,2037, 846,4181, 653,1276,2928,  14,2594, 557,
+3007,2474, 156, 902,1338,1740,2574, 537,2518, 973,2282,2216,2433,1928, 138,2903,
+1293,2631,1612, 646,3457, 839,2935, 111, 496,2191,2847, 589,3186, 149,3994,2060,
+4031,2641,4067,3145,1870,  37,3597,2136,1025,2051,3009,3383,3549,1121,1016,3261,
+1301, 251,2446,2599,2153, 872,3246, 637, 334,3705, 831, 884, 921,3065,3140,4092,
+2198,1944, 246,2964, 108,2045,1152,1921,2308,1031, 203,3173,4170,1907,3890, 810,
+1401,2003,1690, 506, 647,1242,2828,1761,1649,3208,2249,1589,3709,2931,5156,1708,
+ 498, 666,2613, 834,3817,1231, 184,2851,1124, 883,3197,2261,3710,1765,1553,2658,
+1178,2639,2351,  93,1193, 942,2538,2141,4402, 235,1821, 870,1591,2192,1709,1871,
+3341,1618,4126,2595,2334, 603, 651,  69, 701, 268,2662,3411,2555,1380,1606, 503,
+ 448, 254,2371,2646, 574,1187,2309,1770, 322,2235,1292,1801, 305, 566,1133, 229,
+2067,2057, 706, 167, 483,2002,2672,3295,1820,3561,3067, 316, 378,2746,3452,1112,
+ 136,1981, 507,1651,2917,1117, 285,4591, 182,2580,3522,1304, 335,3303,1835,2504,
+1795,1792,2248, 674,1018,2106,2449,1857,2292,2845, 976,3047,1781,2600,2727,1389,
+1281,  52,3152, 153, 265,3950, 672,3485,3951,4463, 430,1183, 365, 278,2169,  27,
+1407,1336,2304, 209,1340,1730,2202,1852,2403,2883, 979,1737,1062, 631,2829,2542,
+3876,2592, 825,2086,2226,3048,3625, 352,1417,3724, 542, 991, 431,1351,3938,1861,
+2294, 826,1361,2927,3142,3503,1738, 463,2462,2723, 582,1916,1595,2808, 400,3845,
+3891,2868,3621,2254,  58,2492,1123, 910,2160,2614,1372,1603,1196,1072,3385,1700,
+3267,1980, 696, 480,2430, 920, 799,1570,2920,1951,2041,4047,2540,1321,4223,2469,
+3562,2228,1271,2602, 401,2833,3351,2575,5157, 907,2312,1256, 410, 263,3507,1582,
+ 996, 678,1849,2316,1480, 908,3545,2237, 703,2322, 667,1826,2849,1531,2604,2999,
+2407,3146,2151,2630,1786,3711, 469,3542, 497,3899,2409, 858, 837,4446,3393,1274,
+ 786, 620,1845,2001,3311, 484, 308,3367,1204,1815,3691,2332,1532,2557,1842,2020,
+2724,1927,2333,4440, 567,  22,1673,2728,4475,1987,1858,1144,1597, 101,1832,3601,
+  12, 974,3783,4391, 951,1412,   1,3720, 453,4608,4041, 528,1041,1027,3230,2628,
+1129, 875,1051,3291,1203,2262,1069,2860,2799,2149,2615,3278, 144,1758,3040,  31,
+ 475,1680, 366,2685,3184, 311,1642,4008,2466,5036,1593,1493,2809, 216,1420,1668,
+ 233, 304,2128,3284, 232,1429,1768,1040,2008,3407,2740,2967,2543, 242,2133, 778,
+1565,2022,2620, 505,2189,2756,1098,2273, 372,1614, 708, 553,2846,2094,2278, 169,
+3626,2835,4161, 228,2674,3165, 809,1454,1309, 466,1705,1095, 900,3423, 880,2667,
+3751,5258,2317,3109,2571,4317,2766,1503,1342, 866,4447,1118,  63,2076, 314,1881,
+1348,1061, 172, 978,3515,1747, 532, 511,3970,   6, 601, 905,2699,3300,1751, 276,
+1467,3725,2668,  65,4239,2544,2779,2556,1604, 578,2451,1802, 992,2331,2624,1320,
+3446, 713,1513,1013, 103,2786,2447,1661, 886,1702, 916, 654,3574,2031,1556, 751,
+2178,2821,2179,1498,1538,2176, 271, 914,2251,2080,1325, 638,1953,2937,3877,2432,
+2754,  95,3265,1716, 260,1227,4083, 775, 106,1357,3254, 426,1607, 555,2480, 772,
+1985, 244,2546, 474, 495,1046,2611,1851,2061,  71,2089,1675,2590, 742,3758,2843,
+3222,1433, 267,2180,2576,2826,2233,2092,3913,2435, 956,1745,3075, 856,2113,1116,
+ 451,   3,1988,2896,1398, 993,2463,1878,2049,1341,2718,2721,2870,2108, 712,2904,
+4363,2753,2324, 277,2872,2349,2649, 384, 987, 435, 691,3000, 922, 164,3939, 652,
+1500,1184,4153,2482,3373,2165,4848,2335,3775,3508,3154,2806,2830,1554,2102,1664,
+2530,1434,2408, 893,1547,2623,3447,2832,2242,2532,3169,2856,3223,2078,  49,3770,
+3469, 462, 318, 656,2259,3250,3069, 679,1629,2758, 344,1138,1104,3120,1836,1283,
+3115,2154,1437,4448, 934, 759,1999, 794,2862,1038, 533,2560,1722,2342, 855,2626,
+1197,1663,4476,3127,  85,4240,2528,  25,1111,1181,3673, 407,3470,4561,2679,2713,
+ 768,1925,2841,3986,1544,1165, 932, 373,1240,2146,1930,2673, 721,4766, 354,4333,
+ 391,2963, 187,  61,3364,1442,1102, 330,1940,1767, 341,3809,4118, 393,2496,2062,
+2211, 105, 331, 300, 439, 913,1332, 626, 379,3304,1557, 328, 689,3952, 309,1555,
+ 931, 317,2517,3027, 325, 569, 686,2107,3084,  60,1042,1333,2794, 264,3177,4014,
+1628, 258,3712,   7,4464,1176,1043,1778, 683, 114,1975,  78,1492, 383,1886, 510,
+ 386, 645,5291,2891,2069,3305,4138,3867,2939,2603,2493,1935,1066,1848,3588,1015,
+1282,1289,4609, 697,1453,3044,2666,3611,1856,2412,  54, 719,1330, 568,3778,2459,
+1748, 788, 492, 551,1191,1000, 488,3394,3763, 282,1799, 348,2016,1523,3155,2390,
+1049, 382,2019,1788,1170, 729,2968,3523, 897,3926,2785,2938,3292, 350,2319,3238,
+1718,1717,2655,3453,3143,4465, 161,2889,2980,2009,1421,  56,1908,1640,2387,2232,
+1917,1874,2477,4921, 148,  83,3438, 592,4245,2882,1822,1055, 741, 115,1496,1624,
+ 381,1638,4592,1020, 516,3214, 458, 947,4575,1432, 211,1514,2926,1865,2142, 189,
+ 852,1221,1400,1486, 882,2299,4036, 351,  28,1122, 700,6479,6480,6481,6482,6483,  #last 512
+)
+# fmt: on
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312prober.py
new file mode 100644
index 0000000..251c042
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/gb2312prober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import GB2312DistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import GB2312_SM_MODEL
+
+
+class GB2312Prober(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(GB2312_SM_MODEL)
+        self.distribution_analyzer = GB2312DistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "GB2312"
+
+    @property
+    def language(self):
+        return "Chinese"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/hebrewprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/hebrewprober.py
new file mode 100644
index 0000000..3ca634b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/hebrewprober.py
@@ -0,0 +1,302 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+#          Shy Shalom
+# Portions created by the Initial Developer are Copyright (C) 2005
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+# This prober doesn't actually recognize a language or a charset.
+# It is a helper prober for the use of the Hebrew model probers
+
+### General ideas of the Hebrew charset recognition ###
+#
+# Four main charsets exist in Hebrew:
+# "ISO-8859-8" - Visual Hebrew
+# "windows-1255" - Logical Hebrew
+# "ISO-8859-8-I" - Logical Hebrew
+# "x-mac-hebrew" - ?? Logical Hebrew ??
+#
+# Both "ISO" charsets use a completely identical set of code points, whereas
+# "windows-1255" and "x-mac-hebrew" are two different proper supersets of
+# these code points. windows-1255 defines additional characters in the range
+# 0x80-0x9F as some misc punctuation marks as well as some Hebrew-specific
+# diacritics and additional 'Yiddish' ligature letters in the range 0xc0-0xd6.
+# x-mac-hebrew defines similar additional code points but with a different
+# mapping.
+#
+# As far as an average Hebrew text with no diacritics is concerned, all four
+# charsets are identical with respect to code points. Meaning that for the
+# main Hebrew alphabet, all four map the same values to all 27 Hebrew letters
+# (including final letters).
+#
+# The dominant difference between these charsets is their directionality.
+# "Visual" directionality means that the text is ordered as if the renderer is
+# not aware of a BIDI rendering algorithm. The renderer sees the text and
+# draws it from left to right. The text itself when ordered naturally is read
+# backwards. A buffer of Visual Hebrew generally looks like so:
+# "[last word of first line spelled backwards] [whole line ordered backwards
+# and spelled backwards] [first word of first line spelled backwards]
+# [end of line] [last word of second line] ... etc' "
+# adding punctuation marks, numbers and English text to visual text is
+# naturally also "visual" and from left to right.
+#
+# "Logical" directionality means the text is ordered "naturally" according to
+# the order it is read. It is the responsibility of the renderer to display
+# the text from right to left. A BIDI algorithm is used to place general
+# punctuation marks, numbers and English text in the text.
+#
+# Texts in x-mac-hebrew are almost impossible to find on the Internet. From
+# what little evidence I could find, it seems that its general directionality
+# is Logical.
+#
+# To sum up all of the above, the Hebrew probing mechanism knows about two
+# charsets:
+# Visual Hebrew - "ISO-8859-8" - backwards text - Words and sentences are
+#    backwards while line order is natural. For charset recognition purposes
+#    the line order is unimportant (In fact, for this implementation, even
+#    word order is unimportant).
+# Logical Hebrew - "windows-1255" - normal, naturally ordered text.
+#
+# "ISO-8859-8-I" is a subset of windows-1255 and doesn't need to be
+#    specifically identified.
+# "x-mac-hebrew" is also identified as windows-1255. A text in x-mac-hebrew
+#    that contain special punctuation marks or diacritics is displayed with
+#    some unconverted characters showing as question marks. This problem might
+#    be corrected using another model prober for x-mac-hebrew. Due to the fact
+#    that x-mac-hebrew texts are so rare, writing another model prober isn't
+#    worth the effort and performance hit.
+#
+#### The Prober ####
+#
+# The prober is divided between two SBCharSetProbers and a HebrewProber,
+# all of which are managed, created, fed data, inquired and deleted by the
+# SBCSGroupProber. The two SBCharSetProbers identify that the text is in
+# fact some kind of Hebrew, Logical or Visual. The final decision about which
+# one is it is made by the HebrewProber by combining final-letter scores
+# with the scores of the two SBCharSetProbers to produce a final answer.
+#
+# The SBCSGroupProber is responsible for stripping the original text of HTML
+# tags, English characters, numbers, low-ASCII punctuation characters, spaces
+# and new lines. It reduces any sequence of such characters to a single space.
+# The buffer fed to each prober in the SBCS group prober is pure text in
+# high-ASCII.
+# The two SBCharSetProbers (model probers) share the same language model:
+# Win1255Model.
+# The first SBCharSetProber uses the model normally as any other
+# SBCharSetProber does, to recognize windows-1255, upon which this model was
+# built. The second SBCharSetProber is told to make the pair-of-letter
+# lookup in the language model backwards. This in practice exactly simulates
+# a visual Hebrew model using the windows-1255 logical Hebrew model.
+#
+# The HebrewProber is not using any language model. All it does is look for
+# final-letter evidence suggesting the text is either logical Hebrew or visual
+# Hebrew. Disjointed from the model probers, the results of the HebrewProber
+# alone are meaningless. HebrewProber always returns 0.00 as confidence
+# since it never identifies a charset by itself. Instead, the pointer to the
+# HebrewProber is passed to the model probers as a helper "Name Prober".
+# When the Group prober receives a positive identification from any prober,
+# it asks for the name of the charset identified. If the prober queried is a
+# Hebrew model prober, the model prober forwards the call to the
+# HebrewProber to make the final decision. In the HebrewProber, the
+# decision is made according to the final-letters scores maintained and Both
+# model probers scores. The answer is returned in the form of the name of the
+# charset identified, either "windows-1255" or "ISO-8859-8".
+
+
+class HebrewProber(CharSetProber):
+    # windows-1255 / ISO-8859-8 code points of interest
+    FINAL_KAF = 0xEA
+    NORMAL_KAF = 0xEB
+    FINAL_MEM = 0xED
+    NORMAL_MEM = 0xEE
+    FINAL_NUN = 0xEF
+    NORMAL_NUN = 0xF0
+    FINAL_PE = 0xF3
+    NORMAL_PE = 0xF4
+    FINAL_TSADI = 0xF5
+    NORMAL_TSADI = 0xF6
+
+    # Minimum Visual vs Logical final letter score difference.
+    # If the difference is below this, don't rely solely on the final letter score
+    # distance.
+    MIN_FINAL_CHAR_DISTANCE = 5
+
+    # Minimum Visual vs Logical model score difference.
+    # If the difference is below this, don't rely at all on the model score
+    # distance.
+    MIN_MODEL_DISTANCE = 0.01
+
+    VISUAL_HEBREW_NAME = "ISO-8859-8"
+    LOGICAL_HEBREW_NAME = "windows-1255"
+
+    def __init__(self):
+        super().__init__()
+        self._final_char_logical_score = None
+        self._final_char_visual_score = None
+        self._prev = None
+        self._before_prev = None
+        self._logical_prober = None
+        self._visual_prober = None
+        self.reset()
+
+    def reset(self):
+        self._final_char_logical_score = 0
+        self._final_char_visual_score = 0
+        # The two last characters seen in the previous buffer,
+        # mPrev and mBeforePrev are initialized to space in order to simulate
+        # a word delimiter at the beginning of the data
+        self._prev = " "
+        self._before_prev = " "
+        # These probers are owned by the group prober.
+
+    def set_model_probers(self, logical_prober, visual_prober):
+        self._logical_prober = logical_prober
+        self._visual_prober = visual_prober
+
+    def is_final(self, c):
+        return c in [
+            self.FINAL_KAF,
+            self.FINAL_MEM,
+            self.FINAL_NUN,
+            self.FINAL_PE,
+            self.FINAL_TSADI,
+        ]
+
+    def is_non_final(self, c):
+        # The normal Tsadi is not a good Non-Final letter due to words like
+        # 'lechotet' (to chat) containing an apostrophe after the tsadi. This
+        # apostrophe is converted to a space in FilterWithoutEnglishLetters
+        # causing the Non-Final tsadi to appear at an end of a word even
+        # though this is not the case in the original text.
+        # The letters Pe and Kaf rarely display a related behavior of not being
+        # a good Non-Final letter. Words like 'Pop', 'Winamp' and 'Mubarak'
+        # for example legally end with a Non-Final Pe or Kaf. However, the
+        # benefit of these letters as Non-Final letters outweighs the damage
+        # since these words are quite rare.
+        return c in [self.NORMAL_KAF, self.NORMAL_MEM, self.NORMAL_NUN, self.NORMAL_PE]
+
+    def feed(self, byte_str):
+        # Final letter analysis for logical-visual decision.
+        # Look for evidence that the received buffer is either logical Hebrew
+        # or visual Hebrew.
+        # The following cases are checked:
+        # 1) A word longer than 1 letter, ending with a final letter. This is
+        #    an indication that the text is laid out "naturally" since the
+        #    final letter really appears at the end. +1 for logical score.
+        # 2) A word longer than 1 letter, ending with a Non-Final letter. In
+        #    normal Hebrew, words ending with Kaf, Mem, Nun, Pe or Tsadi,
+        #    should not end with the Non-Final form of that letter. Exceptions
+        #    to this rule are mentioned above in isNonFinal(). This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score
+        # 3) A word longer than 1 letter, starting with a final letter. Final
+        #    letters should not appear at the beginning of a word. This is an
+        #    indication that the text is laid out backwards. +1 for visual
+        #    score.
+        #
+        # The visual score and logical score are accumulated throughout the
+        # text and are finally checked against each other in GetCharSetName().
+        # No checking for final letters in the middle of words is done since
+        # that case is not an indication for either Logical or Visual text.
+        #
+        # We automatically filter out all 7-bit characters (replace them with
+        # spaces) so the word boundary detection works properly. [MAP]
+
+        if self.state == ProbingState.NOT_ME:
+            # Both model probers say it's not them. No reason to continue.
+            return ProbingState.NOT_ME
+
+        byte_str = self.filter_high_byte_only(byte_str)
+
+        for cur in byte_str:
+            if cur == " ":
+                # We stand on a space - a word just ended
+                if self._before_prev != " ":
+                    # next-to-last char was not a space so self._prev is not a
+                    # 1 letter word
+                    if self.is_final(self._prev):
+                        # case (1) [-2:not space][-1:final letter][cur:space]
+                        self._final_char_logical_score += 1
+                    elif self.is_non_final(self._prev):
+                        # case (2) [-2:not space][-1:Non-Final letter][
+                        #  cur:space]
+                        self._final_char_visual_score += 1
+            else:
+                # Not standing on a space
+                if (
+                    (self._before_prev == " ")
+                    and (self.is_final(self._prev))
+                    and (cur != " ")
+                ):
+                    # case (3) [-2:space][-1:final letter][cur:not space]
+                    self._final_char_visual_score += 1
+            self._before_prev = self._prev
+            self._prev = cur
+
+        # Forever detecting, till the end or until both model probers return
+        # ProbingState.NOT_ME (handled above)
+        return ProbingState.DETECTING
+
+    @property
+    def charset_name(self):
+        # Make the decision: is it Logical or Visual?
+        # If the final letter score distance is dominant enough, rely on it.
+        finalsub = self._final_char_logical_score - self._final_char_visual_score
+        if finalsub >= self.MIN_FINAL_CHAR_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if finalsub <= -self.MIN_FINAL_CHAR_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # It's not dominant enough, try to rely on the model scores instead.
+        modelsub = (
+            self._logical_prober.get_confidence() - self._visual_prober.get_confidence()
+        )
+        if modelsub > self.MIN_MODEL_DISTANCE:
+            return self.LOGICAL_HEBREW_NAME
+        if modelsub < -self.MIN_MODEL_DISTANCE:
+            return self.VISUAL_HEBREW_NAME
+
+        # Still no good, back to final letter distance, maybe it'll save the
+        # day.
+        if finalsub < 0.0:
+            return self.VISUAL_HEBREW_NAME
+
+        # (finalsub > 0 - Logical) or (don't know what to do) default to
+        # Logical.
+        return self.LOGICAL_HEBREW_NAME
+
+    @property
+    def language(self):
+        return "Hebrew"
+
+    @property
+    def state(self):
+        # Remain active as long as any of the model probers are active.
+        if (self._logical_prober.state == ProbingState.NOT_ME) and (
+            self._visual_prober.state == ProbingState.NOT_ME
+        ):
+            return ProbingState.NOT_ME
+        return ProbingState.DETECTING
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jisfreq.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jisfreq.py
new file mode 100644
index 0000000..3293576
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jisfreq.py
@@ -0,0 +1,325 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# Sampling from about 20M text materials include literature and computer technology
+#
+# Japanese frequency table, applied to both S-JIS and EUC-JP
+# They are sorted in order.
+
+# 128  --> 0.77094
+# 256  --> 0.85710
+# 512  --> 0.92635
+# 1024 --> 0.97130
+# 2048 --> 0.99431
+#
+# Ideal Distribution Ratio = 0.92635 / (1-0.92635) = 12.58
+# Random Distribution Ration = 512 / (2965+62+83+86-512) = 0.191
+#
+# Typical Distribution Ratio, 25% of IDR
+
+JIS_TYPICAL_DISTRIBUTION_RATIO = 3.0
+
+# Char to FreqOrder table ,
+JIS_TABLE_SIZE = 4368
+
+# fmt: off
+JIS_CHAR_TO_FREQ_ORDER = (
+  40,   1,   6, 182, 152, 180, 295,2127, 285, 381,3295,4304,3068,4606,3165,3510, #   16
+3511,1822,2785,4607,1193,2226,5070,4608, 171,2996,1247,  18, 179,5071, 856,1661, #   32
+1262,5072, 619, 127,3431,3512,3230,1899,1700, 232, 228,1294,1298, 284, 283,2041, #   48
+2042,1061,1062,  48,  49,  44,  45, 433, 434,1040,1041, 996, 787,2997,1255,4305, #   64
+2108,4609,1684,1648,5073,5074,5075,5076,5077,5078,3687,5079,4610,5080,3927,3928, #   80
+5081,3296,3432, 290,2285,1471,2187,5082,2580,2825,1303,2140,1739,1445,2691,3375, #   96
+1691,3297,4306,4307,4611, 452,3376,1182,2713,3688,3069,4308,5083,5084,5085,5086, #  112
+5087,5088,5089,5090,5091,5092,5093,5094,5095,5096,5097,5098,5099,5100,5101,5102, #  128
+5103,5104,5105,5106,5107,5108,5109,5110,5111,5112,4097,5113,5114,5115,5116,5117, #  144
+5118,5119,5120,5121,5122,5123,5124,5125,5126,5127,5128,5129,5130,5131,5132,5133, #  160
+5134,5135,5136,5137,5138,5139,5140,5141,5142,5143,5144,5145,5146,5147,5148,5149, #  176
+5150,5151,5152,4612,5153,5154,5155,5156,5157,5158,5159,5160,5161,5162,5163,5164, #  192
+5165,5166,5167,5168,5169,5170,5171,5172,5173,5174,5175,1472, 598, 618, 820,1205, #  208
+1309,1412,1858,1307,1692,5176,5177,5178,5179,5180,5181,5182,1142,1452,1234,1172, #  224
+1875,2043,2149,1793,1382,2973, 925,2404,1067,1241, 960,1377,2935,1491, 919,1217, #  240
+1865,2030,1406,1499,2749,4098,5183,5184,5185,5186,5187,5188,2561,4099,3117,1804, #  256
+2049,3689,4309,3513,1663,5189,3166,3118,3298,1587,1561,3433,5190,3119,1625,2998, #  272
+3299,4613,1766,3690,2786,4614,5191,5192,5193,5194,2161,  26,3377,   2,3929,  20, #  288
+3691,  47,4100,  50,  17,  16,  35, 268,  27, 243,  42, 155,  24, 154,  29, 184, #  304
+   4,  91,  14,  92,  53, 396,  33, 289,   9,  37,  64, 620,  21,  39, 321,   5, #  320
+  12,  11,  52,  13,   3, 208, 138,   0,   7,  60, 526, 141, 151,1069, 181, 275, #  336
+1591,  83, 132,1475, 126, 331, 829,  15,  69, 160,  59,  22, 157,  55,1079, 312, #  352
+ 109,  38,  23,  25,  10,  19,  79,5195,  61, 382,1124,   8,  30,5196,5197,5198, #  368
+5199,5200,5201,5202,5203,5204,5205,5206,  89,  62,  74,  34,2416, 112, 139, 196, #  384
+ 271, 149,  84, 607, 131, 765,  46,  88, 153, 683,  76, 874, 101, 258,  57,  80, #  400
+  32, 364, 121,1508, 169,1547,  68, 235, 145,2999,  41, 360,3027,  70,  63,  31, #  416
+  43, 259, 262,1383,  99, 533, 194,  66,  93, 846, 217, 192,  56, 106,  58, 565, #  432
+ 280, 272, 311, 256, 146,  82, 308,  71, 100, 128, 214, 655, 110, 261, 104,1140, #  448
+  54,  51,  36,  87,  67,3070, 185,2618,2936,2020,  28,1066,2390,2059,5207,5208, #  464
+5209,5210,5211,5212,5213,5214,5215,5216,4615,5217,5218,5219,5220,5221,5222,5223, #  480
+5224,5225,5226,5227,5228,5229,5230,5231,5232,5233,5234,5235,5236,3514,5237,5238, #  496
+5239,5240,5241,5242,5243,5244,2297,2031,4616,4310,3692,5245,3071,5246,3598,5247, #  512
+4617,3231,3515,5248,4101,4311,4618,3808,4312,4102,5249,4103,4104,3599,5250,5251, #  528
+5252,5253,5254,5255,5256,5257,5258,5259,5260,5261,5262,5263,5264,5265,5266,5267, #  544
+5268,5269,5270,5271,5272,5273,5274,5275,5276,5277,5278,5279,5280,5281,5282,5283, #  560
+5284,5285,5286,5287,5288,5289,5290,5291,5292,5293,5294,5295,5296,5297,5298,5299, #  576
+5300,5301,5302,5303,5304,5305,5306,5307,5308,5309,5310,5311,5312,5313,5314,5315, #  592
+5316,5317,5318,5319,5320,5321,5322,5323,5324,5325,5326,5327,5328,5329,5330,5331, #  608
+5332,5333,5334,5335,5336,5337,5338,5339,5340,5341,5342,5343,5344,5345,5346,5347, #  624
+5348,5349,5350,5351,5352,5353,5354,5355,5356,5357,5358,5359,5360,5361,5362,5363, #  640
+5364,5365,5366,5367,5368,5369,5370,5371,5372,5373,5374,5375,5376,5377,5378,5379, #  656
+5380,5381, 363, 642,2787,2878,2788,2789,2316,3232,2317,3434,2011, 165,1942,3930, #  672
+3931,3932,3933,5382,4619,5383,4620,5384,5385,5386,5387,5388,5389,5390,5391,5392, #  688
+5393,5394,5395,5396,5397,5398,5399,5400,5401,5402,5403,5404,5405,5406,5407,5408, #  704
+5409,5410,5411,5412,5413,5414,5415,5416,5417,5418,5419,5420,5421,5422,5423,5424, #  720
+5425,5426,5427,5428,5429,5430,5431,5432,5433,5434,5435,5436,5437,5438,5439,5440, #  736
+5441,5442,5443,5444,5445,5446,5447,5448,5449,5450,5451,5452,5453,5454,5455,5456, #  752
+5457,5458,5459,5460,5461,5462,5463,5464,5465,5466,5467,5468,5469,5470,5471,5472, #  768
+5473,5474,5475,5476,5477,5478,5479,5480,5481,5482,5483,5484,5485,5486,5487,5488, #  784
+5489,5490,5491,5492,5493,5494,5495,5496,5497,5498,5499,5500,5501,5502,5503,5504, #  800
+5505,5506,5507,5508,5509,5510,5511,5512,5513,5514,5515,5516,5517,5518,5519,5520, #  816
+5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5532,5533,5534,5535,5536, #  832
+5537,5538,5539,5540,5541,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552, #  848
+5553,5554,5555,5556,5557,5558,5559,5560,5561,5562,5563,5564,5565,5566,5567,5568, #  864
+5569,5570,5571,5572,5573,5574,5575,5576,5577,5578,5579,5580,5581,5582,5583,5584, #  880
+5585,5586,5587,5588,5589,5590,5591,5592,5593,5594,5595,5596,5597,5598,5599,5600, #  896
+5601,5602,5603,5604,5605,5606,5607,5608,5609,5610,5611,5612,5613,5614,5615,5616, #  912
+5617,5618,5619,5620,5621,5622,5623,5624,5625,5626,5627,5628,5629,5630,5631,5632, #  928
+5633,5634,5635,5636,5637,5638,5639,5640,5641,5642,5643,5644,5645,5646,5647,5648, #  944
+5649,5650,5651,5652,5653,5654,5655,5656,5657,5658,5659,5660,5661,5662,5663,5664, #  960
+5665,5666,5667,5668,5669,5670,5671,5672,5673,5674,5675,5676,5677,5678,5679,5680, #  976
+5681,5682,5683,5684,5685,5686,5687,5688,5689,5690,5691,5692,5693,5694,5695,5696, #  992
+5697,5698,5699,5700,5701,5702,5703,5704,5705,5706,5707,5708,5709,5710,5711,5712, # 1008
+5713,5714,5715,5716,5717,5718,5719,5720,5721,5722,5723,5724,5725,5726,5727,5728, # 1024
+5729,5730,5731,5732,5733,5734,5735,5736,5737,5738,5739,5740,5741,5742,5743,5744, # 1040
+5745,5746,5747,5748,5749,5750,5751,5752,5753,5754,5755,5756,5757,5758,5759,5760, # 1056
+5761,5762,5763,5764,5765,5766,5767,5768,5769,5770,5771,5772,5773,5774,5775,5776, # 1072
+5777,5778,5779,5780,5781,5782,5783,5784,5785,5786,5787,5788,5789,5790,5791,5792, # 1088
+5793,5794,5795,5796,5797,5798,5799,5800,5801,5802,5803,5804,5805,5806,5807,5808, # 1104
+5809,5810,5811,5812,5813,5814,5815,5816,5817,5818,5819,5820,5821,5822,5823,5824, # 1120
+5825,5826,5827,5828,5829,5830,5831,5832,5833,5834,5835,5836,5837,5838,5839,5840, # 1136
+5841,5842,5843,5844,5845,5846,5847,5848,5849,5850,5851,5852,5853,5854,5855,5856, # 1152
+5857,5858,5859,5860,5861,5862,5863,5864,5865,5866,5867,5868,5869,5870,5871,5872, # 1168
+5873,5874,5875,5876,5877,5878,5879,5880,5881,5882,5883,5884,5885,5886,5887,5888, # 1184
+5889,5890,5891,5892,5893,5894,5895,5896,5897,5898,5899,5900,5901,5902,5903,5904, # 1200
+5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5916,5917,5918,5919,5920, # 1216
+5921,5922,5923,5924,5925,5926,5927,5928,5929,5930,5931,5932,5933,5934,5935,5936, # 1232
+5937,5938,5939,5940,5941,5942,5943,5944,5945,5946,5947,5948,5949,5950,5951,5952, # 1248
+5953,5954,5955,5956,5957,5958,5959,5960,5961,5962,5963,5964,5965,5966,5967,5968, # 1264
+5969,5970,5971,5972,5973,5974,5975,5976,5977,5978,5979,5980,5981,5982,5983,5984, # 1280
+5985,5986,5987,5988,5989,5990,5991,5992,5993,5994,5995,5996,5997,5998,5999,6000, # 1296
+6001,6002,6003,6004,6005,6006,6007,6008,6009,6010,6011,6012,6013,6014,6015,6016, # 1312
+6017,6018,6019,6020,6021,6022,6023,6024,6025,6026,6027,6028,6029,6030,6031,6032, # 1328
+6033,6034,6035,6036,6037,6038,6039,6040,6041,6042,6043,6044,6045,6046,6047,6048, # 1344
+6049,6050,6051,6052,6053,6054,6055,6056,6057,6058,6059,6060,6061,6062,6063,6064, # 1360
+6065,6066,6067,6068,6069,6070,6071,6072,6073,6074,6075,6076,6077,6078,6079,6080, # 1376
+6081,6082,6083,6084,6085,6086,6087,6088,6089,6090,6091,6092,6093,6094,6095,6096, # 1392
+6097,6098,6099,6100,6101,6102,6103,6104,6105,6106,6107,6108,6109,6110,6111,6112, # 1408
+6113,6114,2044,2060,4621, 997,1235, 473,1186,4622, 920,3378,6115,6116, 379,1108, # 1424
+4313,2657,2735,3934,6117,3809, 636,3233, 573,1026,3693,3435,2974,3300,2298,4105, # 1440
+ 854,2937,2463, 393,2581,2417, 539, 752,1280,2750,2480, 140,1161, 440, 708,1569, # 1456
+ 665,2497,1746,1291,1523,3000, 164,1603, 847,1331, 537,1997, 486, 508,1693,2418, # 1472
+1970,2227, 878,1220, 299,1030, 969, 652,2751, 624,1137,3301,2619,  65,3302,2045, # 1488
+1761,1859,3120,1930,3694,3516, 663,1767, 852, 835,3695, 269, 767,2826,2339,1305, # 1504
+ 896,1150, 770,1616,6118, 506,1502,2075,1012,2519, 775,2520,2975,2340,2938,4314, # 1520
+3028,2086,1224,1943,2286,6119,3072,4315,2240,1273,1987,3935,1557, 175, 597, 985, # 1536
+3517,2419,2521,1416,3029, 585, 938,1931,1007,1052,1932,1685,6120,3379,4316,4623, # 1552
+ 804, 599,3121,1333,2128,2539,1159,1554,2032,3810, 687,2033,2904, 952, 675,1467, # 1568
+3436,6121,2241,1096,1786,2440,1543,1924, 980,1813,2228, 781,2692,1879, 728,1918, # 1584
+3696,4624, 548,1950,4625,1809,1088,1356,3303,2522,1944, 502, 972, 373, 513,2827, # 1600
+ 586,2377,2391,1003,1976,1631,6122,2464,1084, 648,1776,4626,2141, 324, 962,2012, # 1616
+2177,2076,1384, 742,2178,1448,1173,1810, 222, 102, 301, 445, 125,2420, 662,2498, # 1632
+ 277, 200,1476,1165,1068, 224,2562,1378,1446, 450,1880, 659, 791, 582,4627,2939, # 1648
+3936,1516,1274, 555,2099,3697,1020,1389,1526,3380,1762,1723,1787,2229, 412,2114, # 1664
+1900,2392,3518, 512,2597, 427,1925,2341,3122,1653,1686,2465,2499, 697, 330, 273, # 1680
+ 380,2162, 951, 832, 780, 991,1301,3073, 965,2270,3519, 668,2523,2636,1286, 535, # 1696
+1407, 518, 671, 957,2658,2378, 267, 611,2197,3030,6123, 248,2299, 967,1799,2356, # 1712
+ 850,1418,3437,1876,1256,1480,2828,1718,6124,6125,1755,1664,2405,6126,4628,2879, # 1728
+2829, 499,2179, 676,4629, 557,2329,2214,2090, 325,3234, 464, 811,3001, 992,2342, # 1744
+2481,1232,1469, 303,2242, 466,1070,2163, 603,1777,2091,4630,2752,4631,2714, 322, # 1760
+2659,1964,1768, 481,2188,1463,2330,2857,3600,2092,3031,2421,4632,2318,2070,1849, # 1776
+2598,4633,1302,2254,1668,1701,2422,3811,2905,3032,3123,2046,4106,1763,1694,4634, # 1792
+1604, 943,1724,1454, 917, 868,2215,1169,2940, 552,1145,1800,1228,1823,1955, 316, # 1808
+1080,2510, 361,1807,2830,4107,2660,3381,1346,1423,1134,4108,6127, 541,1263,1229, # 1824
+1148,2540, 545, 465,1833,2880,3438,1901,3074,2482, 816,3937, 713,1788,2500, 122, # 1840
+1575, 195,1451,2501,1111,6128, 859, 374,1225,2243,2483,4317, 390,1033,3439,3075, # 1856
+2524,1687, 266, 793,1440,2599, 946, 779, 802, 507, 897,1081, 528,2189,1292, 711, # 1872
+1866,1725,1167,1640, 753, 398,2661,1053, 246, 348,4318, 137,1024,3440,1600,2077, # 1888
+2129, 825,4319, 698, 238, 521, 187,2300,1157,2423,1641,1605,1464,1610,1097,2541, # 1904
+1260,1436, 759,2255,1814,2150, 705,3235, 409,2563,3304, 561,3033,2005,2564, 726, # 1920
+1956,2343,3698,4109, 949,3812,3813,3520,1669, 653,1379,2525, 881,2198, 632,2256, # 1936
+1027, 778,1074, 733,1957, 514,1481,2466, 554,2180, 702,3938,1606,1017,1398,6129, # 1952
+1380,3521, 921, 993,1313, 594, 449,1489,1617,1166, 768,1426,1360, 495,1794,3601, # 1968
+1177,3602,1170,4320,2344, 476, 425,3167,4635,3168,1424, 401,2662,1171,3382,1998, # 1984
+1089,4110, 477,3169, 474,6130,1909, 596,2831,1842, 494, 693,1051,1028,1207,3076, # 2000
+ 606,2115, 727,2790,1473,1115, 743,3522, 630, 805,1532,4321,2021, 366,1057, 838, # 2016
+ 684,1114,2142,4322,2050,1492,1892,1808,2271,3814,2424,1971,1447,1373,3305,1090, # 2032
+1536,3939,3523,3306,1455,2199, 336, 369,2331,1035, 584,2393, 902, 718,2600,6131, # 2048
+2753, 463,2151,1149,1611,2467, 715,1308,3124,1268, 343,1413,3236,1517,1347,2663, # 2064
+2093,3940,2022,1131,1553,2100,2941,1427,3441,2942,1323,2484,6132,1980, 872,2368, # 2080
+2441,2943, 320,2369,2116,1082, 679,1933,3941,2791,3815, 625,1143,2023, 422,2200, # 2096
+3816,6133, 730,1695, 356,2257,1626,2301,2858,2637,1627,1778, 937, 883,2906,2693, # 2112
+3002,1769,1086, 400,1063,1325,3307,2792,4111,3077, 456,2345,1046, 747,6134,1524, # 2128
+ 884,1094,3383,1474,2164,1059, 974,1688,2181,2258,1047, 345,1665,1187, 358, 875, # 2144
+3170, 305, 660,3524,2190,1334,1135,3171,1540,1649,2542,1527, 927, 968,2793, 885, # 2160
+1972,1850, 482, 500,2638,1218,1109,1085,2543,1654,2034, 876,  78,2287,1482,1277, # 2176
+ 861,1675,1083,1779, 724,2754, 454, 397,1132,1612,2332, 893, 672,1237, 257,2259, # 2192
+2370, 135,3384, 337,2244, 547, 352, 340, 709,2485,1400, 788,1138,2511, 540, 772, # 2208
+1682,2260,2272,2544,2013,1843,1902,4636,1999,1562,2288,4637,2201,1403,1533, 407, # 2224
+ 576,3308,1254,2071, 978,3385, 170, 136,1201,3125,2664,3172,2394, 213, 912, 873, # 2240
+3603,1713,2202, 699,3604,3699, 813,3442, 493, 531,1054, 468,2907,1483, 304, 281, # 2256
+4112,1726,1252,2094, 339,2319,2130,2639, 756,1563,2944, 748, 571,2976,1588,2425, # 2272
+2715,1851,1460,2426,1528,1392,1973,3237, 288,3309, 685,3386, 296, 892,2716,2216, # 2288
+1570,2245, 722,1747,2217, 905,3238,1103,6135,1893,1441,1965, 251,1805,2371,3700, # 2304
+2601,1919,1078,  75,2182,1509,1592,1270,2640,4638,2152,6136,3310,3817, 524, 706, # 2320
+1075, 292,3818,1756,2602, 317,  98,3173,3605,3525,1844,2218,3819,2502, 814, 567, # 2336
+ 385,2908,1534,6137, 534,1642,3239, 797,6138,1670,1529, 953,4323, 188,1071, 538, # 2352
+ 178, 729,3240,2109,1226,1374,2000,2357,2977, 731,2468,1116,2014,2051,6139,1261, # 2368
+1593, 803,2859,2736,3443, 556, 682, 823,1541,6140,1369,2289,1706,2794, 845, 462, # 2384
+2603,2665,1361, 387, 162,2358,1740, 739,1770,1720,1304,1401,3241,1049, 627,1571, # 2400
+2427,3526,1877,3942,1852,1500, 431,1910,1503, 677, 297,2795, 286,1433,1038,1198, # 2416
+2290,1133,1596,4113,4639,2469,1510,1484,3943,6141,2442, 108, 712,4640,2372, 866, # 2432
+3701,2755,3242,1348, 834,1945,1408,3527,2395,3243,1811, 824, 994,1179,2110,1548, # 2448
+1453, 790,3003, 690,4324,4325,2832,2909,3820,1860,3821, 225,1748, 310, 346,1780, # 2464
+2470, 821,1993,2717,2796, 828, 877,3528,2860,2471,1702,2165,2910,2486,1789, 453, # 2480
+ 359,2291,1676,  73,1164,1461,1127,3311, 421, 604, 314,1037, 589, 116,2487, 737, # 2496
+ 837,1180, 111, 244, 735,6142,2261,1861,1362, 986, 523, 418, 581,2666,3822, 103, # 2512
+ 855, 503,1414,1867,2488,1091, 657,1597, 979, 605,1316,4641,1021,2443,2078,2001, # 2528
+1209,  96, 587,2166,1032, 260,1072,2153, 173,  94, 226,3244, 819,2006,4642,4114, # 2544
+2203, 231,1744, 782,  97,2667, 786,3387, 887, 391, 442,2219,4326,1425,6143,2694, # 2560
+ 633,1544,1202, 483,2015, 592,2052,1958,2472,1655, 419, 129,4327,3444,3312,1714, # 2576
+1257,3078,4328,1518,1098, 865,1310,1019,1885,1512,1734, 469,2444, 148, 773, 436, # 2592
+1815,1868,1128,1055,4329,1245,2756,3445,2154,1934,1039,4643, 579,1238, 932,2320, # 2608
+ 353, 205, 801, 115,2428, 944,2321,1881, 399,2565,1211, 678, 766,3944, 335,2101, # 2624
+1459,1781,1402,3945,2737,2131,1010, 844, 981,1326,1013, 550,1816,1545,2620,1335, # 2640
+1008, 371,2881, 936,1419,1613,3529,1456,1395,2273,1834,2604,1317,2738,2503, 416, # 2656
+1643,4330, 806,1126, 229, 591,3946,1314,1981,1576,1837,1666, 347,1790, 977,3313, # 2672
+ 764,2861,1853, 688,2429,1920,1462,  77, 595, 415,2002,3034, 798,1192,4115,6144, # 2688
+2978,4331,3035,2695,2582,2072,2566, 430,2430,1727, 842,1396,3947,3702, 613, 377, # 2704
+ 278, 236,1417,3388,3314,3174, 757,1869, 107,3530,6145,1194, 623,2262, 207,1253, # 2720
+2167,3446,3948, 492,1117,1935, 536,1838,2757,1246,4332, 696,2095,2406,1393,1572, # 2736
+3175,1782, 583, 190, 253,1390,2230, 830,3126,3389, 934,3245,1703,1749,2979,1870, # 2752
+2545,1656,2204, 869,2346,4116,3176,1817, 496,1764,4644, 942,1504, 404,1903,1122, # 2768
+1580,3606,2945,1022, 515, 372,1735, 955,2431,3036,6146,2797,1110,2302,2798, 617, # 2784
+6147, 441, 762,1771,3447,3607,3608,1904, 840,3037,  86, 939,1385, 572,1370,2445, # 2800
+1336, 114,3703, 898, 294, 203,3315, 703,1583,2274, 429, 961,4333,1854,1951,3390, # 2816
+2373,3704,4334,1318,1381, 966,1911,2322,1006,1155, 309, 989, 458,2718,1795,1372, # 2832
+1203, 252,1689,1363,3177, 517,1936, 168,1490, 562, 193,3823,1042,4117,1835, 551, # 2848
+ 470,4645, 395, 489,3448,1871,1465,2583,2641, 417,1493, 279,1295, 511,1236,1119, # 2864
+  72,1231,1982,1812,3004, 871,1564, 984,3449,1667,2696,2096,4646,2347,2833,1673, # 2880
+3609, 695,3246,2668, 807,1183,4647, 890, 388,2333,1801,1457,2911,1765,1477,1031, # 2896
+3316,3317,1278,3391,2799,2292,2526, 163,3450,4335,2669,1404,1802,6148,2323,2407, # 2912
+1584,1728,1494,1824,1269, 298, 909,3318,1034,1632, 375, 776,1683,2061, 291, 210, # 2928
+1123, 809,1249,1002,2642,3038, 206,1011,2132, 144, 975, 882,1565, 342, 667, 754, # 2944
+1442,2143,1299,2303,2062, 447, 626,2205,1221,2739,2912,1144,1214,2206,2584, 760, # 2960
+1715, 614, 950,1281,2670,2621, 810, 577,1287,2546,4648, 242,2168, 250,2643, 691, # 2976
+ 123,2644, 647, 313,1029, 689,1357,2946,1650, 216, 771,1339,1306, 808,2063, 549, # 2992
+ 913,1371,2913,2914,6149,1466,1092,1174,1196,1311,2605,2396,1783,1796,3079, 406, # 3008
+2671,2117,3949,4649, 487,1825,2220,6150,2915, 448,2348,1073,6151,2397,1707, 130, # 3024
+ 900,1598, 329, 176,1959,2527,1620,6152,2275,4336,3319,1983,2191,3705,3610,2155, # 3040
+3706,1912,1513,1614,6153,1988, 646, 392,2304,1589,3320,3039,1826,1239,1352,1340, # 3056
+2916, 505,2567,1709,1437,2408,2547, 906,6154,2672, 384,1458,1594,1100,1329, 710, # 3072
+ 423,3531,2064,2231,2622,1989,2673,1087,1882, 333, 841,3005,1296,2882,2379, 580, # 3088
+1937,1827,1293,2585, 601, 574, 249,1772,4118,2079,1120, 645, 901,1176,1690, 795, # 3104
+2207, 478,1434, 516,1190,1530, 761,2080, 930,1264, 355, 435,1552, 644,1791, 987, # 3120
+ 220,1364,1163,1121,1538, 306,2169,1327,1222, 546,2645, 218, 241, 610,1704,3321, # 3136
+1984,1839,1966,2528, 451,6155,2586,3707,2568, 907,3178, 254,2947, 186,1845,4650, # 3152
+ 745, 432,1757, 428,1633, 888,2246,2221,2489,3611,2118,1258,1265, 956,3127,1784, # 3168
+4337,2490, 319, 510, 119, 457,3612, 274,2035,2007,4651,1409,3128, 970,2758, 590, # 3184
+2800, 661,2247,4652,2008,3950,1420,1549,3080,3322,3951,1651,1375,2111, 485,2491, # 3200
+1429,1156,6156,2548,2183,1495, 831,1840,2529,2446, 501,1657, 307,1894,3247,1341, # 3216
+ 666, 899,2156,1539,2549,1559, 886, 349,2208,3081,2305,1736,3824,2170,2759,1014, # 3232
+1913,1386, 542,1397,2948, 490, 368, 716, 362, 159, 282,2569,1129,1658,1288,1750, # 3248
+2674, 276, 649,2016, 751,1496, 658,1818,1284,1862,2209,2087,2512,3451, 622,2834, # 3264
+ 376, 117,1060,2053,1208,1721,1101,1443, 247,1250,3179,1792,3952,2760,2398,3953, # 3280
+6157,2144,3708, 446,2432,1151,2570,3452,2447,2761,2835,1210,2448,3082, 424,2222, # 3296
+1251,2449,2119,2836, 504,1581,4338, 602, 817, 857,3825,2349,2306, 357,3826,1470, # 3312
+1883,2883, 255, 958, 929,2917,3248, 302,4653,1050,1271,1751,2307,1952,1430,2697, # 3328
+2719,2359, 354,3180, 777, 158,2036,4339,1659,4340,4654,2308,2949,2248,1146,2232, # 3344
+3532,2720,1696,2623,3827,6158,3129,1550,2698,1485,1297,1428, 637, 931,2721,2145, # 3360
+ 914,2550,2587,  81,2450, 612, 827,2646,1242,4655,1118,2884, 472,1855,3181,3533, # 3376
+3534, 569,1353,2699,1244,1758,2588,4119,2009,2762,2171,3709,1312,1531,6159,1152, # 3392
+1938, 134,1830, 471,3710,2276,1112,1535,3323,3453,3535, 982,1337,2950, 488, 826, # 3408
+ 674,1058,1628,4120,2017, 522,2399, 211, 568,1367,3454, 350, 293,1872,1139,3249, # 3424
+1399,1946,3006,1300,2360,3324, 588, 736,6160,2606, 744, 669,3536,3828,6161,1358, # 3440
+ 199, 723, 848, 933, 851,1939,1505,1514,1338,1618,1831,4656,1634,3613, 443,2740, # 3456
+3829, 717,1947, 491,1914,6162,2551,1542,4121,1025,6163,1099,1223, 198,3040,2722, # 3472
+ 370, 410,1905,2589, 998,1248,3182,2380, 519,1449,4122,1710, 947, 928,1153,4341, # 3488
+2277, 344,2624,1511, 615, 105, 161,1212,1076,1960,3130,2054,1926,1175,1906,2473, # 3504
+ 414,1873,2801,6164,2309, 315,1319,3325, 318,2018,2146,2157, 963, 631, 223,4342, # 3520
+4343,2675, 479,3711,1197,2625,3712,2676,2361,6165,4344,4123,6166,2451,3183,1886, # 3536
+2184,1674,1330,1711,1635,1506, 799, 219,3250,3083,3954,1677,3713,3326,2081,3614, # 3552
+1652,2073,4657,1147,3041,1752, 643,1961, 147,1974,3955,6167,1716,2037, 918,3007, # 3568
+1994, 120,1537, 118, 609,3184,4345, 740,3455,1219, 332,1615,3830,6168,1621,2980, # 3584
+1582, 783, 212, 553,2350,3714,1349,2433,2082,4124, 889,6169,2310,1275,1410, 973, # 3600
+ 166,1320,3456,1797,1215,3185,2885,1846,2590,2763,4658, 629, 822,3008, 763, 940, # 3616
+1990,2862, 439,2409,1566,1240,1622, 926,1282,1907,2764, 654,2210,1607, 327,1130, # 3632
+3956,1678,1623,6170,2434,2192, 686, 608,3831,3715, 903,3957,3042,6171,2741,1522, # 3648
+1915,1105,1555,2552,1359, 323,3251,4346,3457, 738,1354,2553,2311,2334,1828,2003, # 3664
+3832,1753,2351,1227,6172,1887,4125,1478,6173,2410,1874,1712,1847, 520,1204,2607, # 3680
+ 264,4659, 836,2677,2102, 600,4660,3833,2278,3084,6174,4347,3615,1342, 640, 532, # 3696
+ 543,2608,1888,2400,2591,1009,4348,1497, 341,1737,3616,2723,1394, 529,3252,1321, # 3712
+ 983,4661,1515,2120, 971,2592, 924, 287,1662,3186,4349,2700,4350,1519, 908,1948, # 3728
+2452, 156, 796,1629,1486,2223,2055, 694,4126,1259,1036,3392,1213,2249,2742,1889, # 3744
+1230,3958,1015, 910, 408, 559,3617,4662, 746, 725, 935,4663,3959,3009,1289, 563, # 3760
+ 867,4664,3960,1567,2981,2038,2626, 988,2263,2381,4351, 143,2374, 704,1895,6175, # 3776
+1188,3716,2088, 673,3085,2362,4352, 484,1608,1921,2765,2918, 215, 904,3618,3537, # 3792
+ 894, 509, 976,3043,2701,3961,4353,2837,2982, 498,6176,6177,1102,3538,1332,3393, # 3808
+1487,1636,1637, 233, 245,3962, 383, 650, 995,3044, 460,1520,1206,2352, 749,3327, # 3824
+ 530, 700, 389,1438,1560,1773,3963,2264, 719,2951,2724,3834, 870,1832,1644,1000, # 3840
+ 839,2474,3717, 197,1630,3394, 365,2886,3964,1285,2133, 734, 922, 818,1106, 732, # 3856
+ 480,2083,1774,3458, 923,2279,1350, 221,3086,  85,2233,2234,3835,1585,3010,2147, # 3872
+1387,1705,2382,1619,2475, 133, 239,2802,1991,1016,2084,2383, 411,2838,1113, 651, # 3888
+1985,1160,3328, 990,1863,3087,1048,1276,2647, 265,2627,1599,3253,2056, 150, 638, # 3904
+2019, 656, 853, 326,1479, 680,1439,4354,1001,1759, 413,3459,3395,2492,1431, 459, # 3920
+4355,1125,3329,2265,1953,1450,2065,2863, 849, 351,2678,3131,3254,3255,1104,1577, # 3936
+ 227,1351,1645,2453,2193,1421,2887, 812,2121, 634,  95,2435, 201,2312,4665,1646, # 3952
+1671,2743,1601,2554,2702,2648,2280,1315,1366,2089,3132,1573,3718,3965,1729,1189, # 3968
+ 328,2679,1077,1940,1136, 558,1283, 964,1195, 621,2074,1199,1743,3460,3619,1896, # 3984
+1916,1890,3836,2952,1154,2112,1064, 862, 378,3011,2066,2113,2803,1568,2839,6178, # 4000
+3088,2919,1941,1660,2004,1992,2194, 142, 707,1590,1708,1624,1922,1023,1836,1233, # 4016
+1004,2313, 789, 741,3620,6179,1609,2411,1200,4127,3719,3720,4666,2057,3721, 593, # 4032
+2840, 367,2920,1878,6180,3461,1521, 628,1168, 692,2211,2649, 300, 720,2067,2571, # 4048
+2953,3396, 959,2504,3966,3539,3462,1977, 701,6181, 954,1043, 800, 681, 183,3722, # 4064
+1803,1730,3540,4128,2103, 815,2314, 174, 467, 230,2454,1093,2134, 755,3541,3397, # 4080
+1141,1162,6182,1738,2039, 270,3256,2513,1005,1647,2185,3837, 858,1679,1897,1719, # 4096
+2954,2324,1806, 402, 670, 167,4129,1498,2158,2104, 750,6183, 915, 189,1680,1551, # 4112
+ 455,4356,1501,2455, 405,1095,2955, 338,1586,1266,1819, 570, 641,1324, 237,1556, # 4128
+2650,1388,3723,6184,1368,2384,1343,1978,3089,2436, 879,3724, 792,1191, 758,3012, # 4144
+1411,2135,1322,4357, 240,4667,1848,3725,1574,6185, 420,3045,1546,1391, 714,4358, # 4160
+1967, 941,1864, 863, 664, 426, 560,1731,2680,1785,2864,1949,2363, 403,3330,1415, # 4176
+1279,2136,1697,2335, 204, 721,2097,3838,  90,6186,2085,2505, 191,3967, 124,2148, # 4192
+1376,1798,1178,1107,1898,1405, 860,4359,1243,1272,2375,2983,1558,2456,1638, 113, # 4208
+3621, 578,1923,2609, 880, 386,4130, 784,2186,2266,1422,2956,2172,1722, 497, 263, # 4224
+2514,1267,2412,2610, 177,2703,3542, 774,1927,1344, 616,1432,1595,1018, 172,4360, # 4240
+2325, 911,4361, 438,1468,3622, 794,3968,2024,2173,1681,1829,2957, 945, 895,3090, # 4256
+ 575,2212,2476, 475,2401,2681, 785,2744,1745,2293,2555,1975,3133,2865, 394,4668, # 4272
+3839, 635,4131, 639, 202,1507,2195,2766,1345,1435,2572,3726,1908,1184,1181,2457, # 4288
+3727,3134,4362, 843,2611, 437, 916,4669, 234, 769,1884,3046,3047,3623, 833,6187, # 4304
+1639,2250,2402,1355,1185,2010,2047, 999, 525,1732,1290,1488,2612, 948,1578,3728, # 4320
+2413,2477,1216,2725,2159, 334,3840,1328,3624,2921,1525,4132, 564,1056, 891,4363, # 4336
+1444,1698,2385,2251,3729,1365,2281,2235,1717,6188, 864,3841,2515, 444, 527,2767, # 4352
+2922,3625, 544, 461,6189, 566, 209,2437,3398,2098,1065,2068,3331,3626,3257,2137, # 4368  #last 512
+)
+# fmt: on
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabfreq.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabfreq.py
new file mode 100644
index 0000000..c129699
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabfreq.py
@@ -0,0 +1,2382 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+# The frequency data itself is the same as euc-kr.
+# This is just a mapping table to euc-kr.
+
+JOHAB_TO_EUCKR_ORDER_TABLE = {
+    0x8861: 0,
+    0x8862: 1,
+    0x8865: 2,
+    0x8868: 3,
+    0x8869: 4,
+    0x886A: 5,
+    0x886B: 6,
+    0x8871: 7,
+    0x8873: 8,
+    0x8874: 9,
+    0x8875: 10,
+    0x8876: 11,
+    0x8877: 12,
+    0x8878: 13,
+    0x8879: 14,
+    0x887B: 15,
+    0x887C: 16,
+    0x887D: 17,
+    0x8881: 18,
+    0x8882: 19,
+    0x8885: 20,
+    0x8889: 21,
+    0x8891: 22,
+    0x8893: 23,
+    0x8895: 24,
+    0x8896: 25,
+    0x8897: 26,
+    0x88A1: 27,
+    0x88A2: 28,
+    0x88A5: 29,
+    0x88A9: 30,
+    0x88B5: 31,
+    0x88B7: 32,
+    0x88C1: 33,
+    0x88C5: 34,
+    0x88C9: 35,
+    0x88E1: 36,
+    0x88E2: 37,
+    0x88E5: 38,
+    0x88E8: 39,
+    0x88E9: 40,
+    0x88EB: 41,
+    0x88F1: 42,
+    0x88F3: 43,
+    0x88F5: 44,
+    0x88F6: 45,
+    0x88F7: 46,
+    0x88F8: 47,
+    0x88FB: 48,
+    0x88FC: 49,
+    0x88FD: 50,
+    0x8941: 51,
+    0x8945: 52,
+    0x8949: 53,
+    0x8951: 54,
+    0x8953: 55,
+    0x8955: 56,
+    0x8956: 57,
+    0x8957: 58,
+    0x8961: 59,
+    0x8962: 60,
+    0x8963: 61,
+    0x8965: 62,
+    0x8968: 63,
+    0x8969: 64,
+    0x8971: 65,
+    0x8973: 66,
+    0x8975: 67,
+    0x8976: 68,
+    0x8977: 69,
+    0x897B: 70,
+    0x8981: 71,
+    0x8985: 72,
+    0x8989: 73,
+    0x8993: 74,
+    0x8995: 75,
+    0x89A1: 76,
+    0x89A2: 77,
+    0x89A5: 78,
+    0x89A8: 79,
+    0x89A9: 80,
+    0x89AB: 81,
+    0x89AD: 82,
+    0x89B0: 83,
+    0x89B1: 84,
+    0x89B3: 85,
+    0x89B5: 86,
+    0x89B7: 87,
+    0x89B8: 88,
+    0x89C1: 89,
+    0x89C2: 90,
+    0x89C5: 91,
+    0x89C9: 92,
+    0x89CB: 93,
+    0x89D1: 94,
+    0x89D3: 95,
+    0x89D5: 96,
+    0x89D7: 97,
+    0x89E1: 98,
+    0x89E5: 99,
+    0x89E9: 100,
+    0x89F3: 101,
+    0x89F6: 102,
+    0x89F7: 103,
+    0x8A41: 104,
+    0x8A42: 105,
+    0x8A45: 106,
+    0x8A49: 107,
+    0x8A51: 108,
+    0x8A53: 109,
+    0x8A55: 110,
+    0x8A57: 111,
+    0x8A61: 112,
+    0x8A65: 113,
+    0x8A69: 114,
+    0x8A73: 115,
+    0x8A75: 116,
+    0x8A81: 117,
+    0x8A82: 118,
+    0x8A85: 119,
+    0x8A88: 120,
+    0x8A89: 121,
+    0x8A8A: 122,
+    0x8A8B: 123,
+    0x8A90: 124,
+    0x8A91: 125,
+    0x8A93: 126,
+    0x8A95: 127,
+    0x8A97: 128,
+    0x8A98: 129,
+    0x8AA1: 130,
+    0x8AA2: 131,
+    0x8AA5: 132,
+    0x8AA9: 133,
+    0x8AB6: 134,
+    0x8AB7: 135,
+    0x8AC1: 136,
+    0x8AD5: 137,
+    0x8AE1: 138,
+    0x8AE2: 139,
+    0x8AE5: 140,
+    0x8AE9: 141,
+    0x8AF1: 142,
+    0x8AF3: 143,
+    0x8AF5: 144,
+    0x8B41: 145,
+    0x8B45: 146,
+    0x8B49: 147,
+    0x8B61: 148,
+    0x8B62: 149,
+    0x8B65: 150,
+    0x8B68: 151,
+    0x8B69: 152,
+    0x8B6A: 153,
+    0x8B71: 154,
+    0x8B73: 155,
+    0x8B75: 156,
+    0x8B77: 157,
+    0x8B81: 158,
+    0x8BA1: 159,
+    0x8BA2: 160,
+    0x8BA5: 161,
+    0x8BA8: 162,
+    0x8BA9: 163,
+    0x8BAB: 164,
+    0x8BB1: 165,
+    0x8BB3: 166,
+    0x8BB5: 167,
+    0x8BB7: 168,
+    0x8BB8: 169,
+    0x8BBC: 170,
+    0x8C61: 171,
+    0x8C62: 172,
+    0x8C63: 173,
+    0x8C65: 174,
+    0x8C69: 175,
+    0x8C6B: 176,
+    0x8C71: 177,
+    0x8C73: 178,
+    0x8C75: 179,
+    0x8C76: 180,
+    0x8C77: 181,
+    0x8C7B: 182,
+    0x8C81: 183,
+    0x8C82: 184,
+    0x8C85: 185,
+    0x8C89: 186,
+    0x8C91: 187,
+    0x8C93: 188,
+    0x8C95: 189,
+    0x8C96: 190,
+    0x8C97: 191,
+    0x8CA1: 192,
+    0x8CA2: 193,
+    0x8CA9: 194,
+    0x8CE1: 195,
+    0x8CE2: 196,
+    0x8CE3: 197,
+    0x8CE5: 198,
+    0x8CE9: 199,
+    0x8CF1: 200,
+    0x8CF3: 201,
+    0x8CF5: 202,
+    0x8CF6: 203,
+    0x8CF7: 204,
+    0x8D41: 205,
+    0x8D42: 206,
+    0x8D45: 207,
+    0x8D51: 208,
+    0x8D55: 209,
+    0x8D57: 210,
+    0x8D61: 211,
+    0x8D65: 212,
+    0x8D69: 213,
+    0x8D75: 214,
+    0x8D76: 215,
+    0x8D7B: 216,
+    0x8D81: 217,
+    0x8DA1: 218,
+    0x8DA2: 219,
+    0x8DA5: 220,
+    0x8DA7: 221,
+    0x8DA9: 222,
+    0x8DB1: 223,
+    0x8DB3: 224,
+    0x8DB5: 225,
+    0x8DB7: 226,
+    0x8DB8: 227,
+    0x8DB9: 228,
+    0x8DC1: 229,
+    0x8DC2: 230,
+    0x8DC9: 231,
+    0x8DD6: 232,
+    0x8DD7: 233,
+    0x8DE1: 234,
+    0x8DE2: 235,
+    0x8DF7: 236,
+    0x8E41: 237,
+    0x8E45: 238,
+    0x8E49: 239,
+    0x8E51: 240,
+    0x8E53: 241,
+    0x8E57: 242,
+    0x8E61: 243,
+    0x8E81: 244,
+    0x8E82: 245,
+    0x8E85: 246,
+    0x8E89: 247,
+    0x8E90: 248,
+    0x8E91: 249,
+    0x8E93: 250,
+    0x8E95: 251,
+    0x8E97: 252,
+    0x8E98: 253,
+    0x8EA1: 254,
+    0x8EA9: 255,
+    0x8EB6: 256,
+    0x8EB7: 257,
+    0x8EC1: 258,
+    0x8EC2: 259,
+    0x8EC5: 260,
+    0x8EC9: 261,
+    0x8ED1: 262,
+    0x8ED3: 263,
+    0x8ED6: 264,
+    0x8EE1: 265,
+    0x8EE5: 266,
+    0x8EE9: 267,
+    0x8EF1: 268,
+    0x8EF3: 269,
+    0x8F41: 270,
+    0x8F61: 271,
+    0x8F62: 272,
+    0x8F65: 273,
+    0x8F67: 274,
+    0x8F69: 275,
+    0x8F6B: 276,
+    0x8F70: 277,
+    0x8F71: 278,
+    0x8F73: 279,
+    0x8F75: 280,
+    0x8F77: 281,
+    0x8F7B: 282,
+    0x8FA1: 283,
+    0x8FA2: 284,
+    0x8FA5: 285,
+    0x8FA9: 286,
+    0x8FB1: 287,
+    0x8FB3: 288,
+    0x8FB5: 289,
+    0x8FB7: 290,
+    0x9061: 291,
+    0x9062: 292,
+    0x9063: 293,
+    0x9065: 294,
+    0x9068: 295,
+    0x9069: 296,
+    0x906A: 297,
+    0x906B: 298,
+    0x9071: 299,
+    0x9073: 300,
+    0x9075: 301,
+    0x9076: 302,
+    0x9077: 303,
+    0x9078: 304,
+    0x9079: 305,
+    0x907B: 306,
+    0x907D: 307,
+    0x9081: 308,
+    0x9082: 309,
+    0x9085: 310,
+    0x9089: 311,
+    0x9091: 312,
+    0x9093: 313,
+    0x9095: 314,
+    0x9096: 315,
+    0x9097: 316,
+    0x90A1: 317,
+    0x90A2: 318,
+    0x90A5: 319,
+    0x90A9: 320,
+    0x90B1: 321,
+    0x90B7: 322,
+    0x90E1: 323,
+    0x90E2: 324,
+    0x90E4: 325,
+    0x90E5: 326,
+    0x90E9: 327,
+    0x90EB: 328,
+    0x90EC: 329,
+    0x90F1: 330,
+    0x90F3: 331,
+    0x90F5: 332,
+    0x90F6: 333,
+    0x90F7: 334,
+    0x90FD: 335,
+    0x9141: 336,
+    0x9142: 337,
+    0x9145: 338,
+    0x9149: 339,
+    0x9151: 340,
+    0x9153: 341,
+    0x9155: 342,
+    0x9156: 343,
+    0x9157: 344,
+    0x9161: 345,
+    0x9162: 346,
+    0x9165: 347,
+    0x9169: 348,
+    0x9171: 349,
+    0x9173: 350,
+    0x9176: 351,
+    0x9177: 352,
+    0x917A: 353,
+    0x9181: 354,
+    0x9185: 355,
+    0x91A1: 356,
+    0x91A2: 357,
+    0x91A5: 358,
+    0x91A9: 359,
+    0x91AB: 360,
+    0x91B1: 361,
+    0x91B3: 362,
+    0x91B5: 363,
+    0x91B7: 364,
+    0x91BC: 365,
+    0x91BD: 366,
+    0x91C1: 367,
+    0x91C5: 368,
+    0x91C9: 369,
+    0x91D6: 370,
+    0x9241: 371,
+    0x9245: 372,
+    0x9249: 373,
+    0x9251: 374,
+    0x9253: 375,
+    0x9255: 376,
+    0x9261: 377,
+    0x9262: 378,
+    0x9265: 379,
+    0x9269: 380,
+    0x9273: 381,
+    0x9275: 382,
+    0x9277: 383,
+    0x9281: 384,
+    0x9282: 385,
+    0x9285: 386,
+    0x9288: 387,
+    0x9289: 388,
+    0x9291: 389,
+    0x9293: 390,
+    0x9295: 391,
+    0x9297: 392,
+    0x92A1: 393,
+    0x92B6: 394,
+    0x92C1: 395,
+    0x92E1: 396,
+    0x92E5: 397,
+    0x92E9: 398,
+    0x92F1: 399,
+    0x92F3: 400,
+    0x9341: 401,
+    0x9342: 402,
+    0x9349: 403,
+    0x9351: 404,
+    0x9353: 405,
+    0x9357: 406,
+    0x9361: 407,
+    0x9362: 408,
+    0x9365: 409,
+    0x9369: 410,
+    0x936A: 411,
+    0x936B: 412,
+    0x9371: 413,
+    0x9373: 414,
+    0x9375: 415,
+    0x9377: 416,
+    0x9378: 417,
+    0x937C: 418,
+    0x9381: 419,
+    0x9385: 420,
+    0x9389: 421,
+    0x93A1: 422,
+    0x93A2: 423,
+    0x93A5: 424,
+    0x93A9: 425,
+    0x93AB: 426,
+    0x93B1: 427,
+    0x93B3: 428,
+    0x93B5: 429,
+    0x93B7: 430,
+    0x93BC: 431,
+    0x9461: 432,
+    0x9462: 433,
+    0x9463: 434,
+    0x9465: 435,
+    0x9468: 436,
+    0x9469: 437,
+    0x946A: 438,
+    0x946B: 439,
+    0x946C: 440,
+    0x9470: 441,
+    0x9471: 442,
+    0x9473: 443,
+    0x9475: 444,
+    0x9476: 445,
+    0x9477: 446,
+    0x9478: 447,
+    0x9479: 448,
+    0x947D: 449,
+    0x9481: 450,
+    0x9482: 451,
+    0x9485: 452,
+    0x9489: 453,
+    0x9491: 454,
+    0x9493: 455,
+    0x9495: 456,
+    0x9496: 457,
+    0x9497: 458,
+    0x94A1: 459,
+    0x94E1: 460,
+    0x94E2: 461,
+    0x94E3: 462,
+    0x94E5: 463,
+    0x94E8: 464,
+    0x94E9: 465,
+    0x94EB: 466,
+    0x94EC: 467,
+    0x94F1: 468,
+    0x94F3: 469,
+    0x94F5: 470,
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+    0xC185: 1825,
+    0xC197: 1826,
+    0xC1A1: 1827,
+    0xC1A2: 1828,
+    0xC1A5: 1829,
+    0xC1A9: 1830,
+    0xC1B1: 1831,
+    0xC1B3: 1832,
+    0xC1B5: 1833,
+    0xC1B7: 1834,
+    0xC1C1: 1835,
+    0xC1C5: 1836,
+    0xC1C9: 1837,
+    0xC1D7: 1838,
+    0xC241: 1839,
+    0xC245: 1840,
+    0xC249: 1841,
+    0xC251: 1842,
+    0xC253: 1843,
+    0xC255: 1844,
+    0xC257: 1845,
+    0xC261: 1846,
+    0xC271: 1847,
+    0xC281: 1848,
+    0xC282: 1849,
+    0xC285: 1850,
+    0xC289: 1851,
+    0xC291: 1852,
+    0xC293: 1853,
+    0xC295: 1854,
+    0xC297: 1855,
+    0xC2A1: 1856,
+    0xC2B6: 1857,
+    0xC2C1: 1858,
+    0xC2C5: 1859,
+    0xC2E1: 1860,
+    0xC2E5: 1861,
+    0xC2E9: 1862,
+    0xC2F1: 1863,
+    0xC2F3: 1864,
+    0xC2F5: 1865,
+    0xC2F7: 1866,
+    0xC341: 1867,
+    0xC345: 1868,
+    0xC349: 1869,
+    0xC351: 1870,
+    0xC357: 1871,
+    0xC361: 1872,
+    0xC362: 1873,
+    0xC365: 1874,
+    0xC369: 1875,
+    0xC371: 1876,
+    0xC373: 1877,
+    0xC375: 1878,
+    0xC377: 1879,
+    0xC3A1: 1880,
+    0xC3A2: 1881,
+    0xC3A5: 1882,
+    0xC3A8: 1883,
+    0xC3A9: 1884,
+    0xC3AA: 1885,
+    0xC3B1: 1886,
+    0xC3B3: 1887,
+    0xC3B5: 1888,
+    0xC3B7: 1889,
+    0xC461: 1890,
+    0xC462: 1891,
+    0xC465: 1892,
+    0xC469: 1893,
+    0xC471: 1894,
+    0xC473: 1895,
+    0xC475: 1896,
+    0xC477: 1897,
+    0xC481: 1898,
+    0xC482: 1899,
+    0xC485: 1900,
+    0xC489: 1901,
+    0xC491: 1902,
+    0xC493: 1903,
+    0xC495: 1904,
+    0xC496: 1905,
+    0xC497: 1906,
+    0xC4A1: 1907,
+    0xC4A2: 1908,
+    0xC4B7: 1909,
+    0xC4E1: 1910,
+    0xC4E2: 1911,
+    0xC4E5: 1912,
+    0xC4E8: 1913,
+    0xC4E9: 1914,
+    0xC4F1: 1915,
+    0xC4F3: 1916,
+    0xC4F5: 1917,
+    0xC4F6: 1918,
+    0xC4F7: 1919,
+    0xC541: 1920,
+    0xC542: 1921,
+    0xC545: 1922,
+    0xC549: 1923,
+    0xC551: 1924,
+    0xC553: 1925,
+    0xC555: 1926,
+    0xC557: 1927,
+    0xC561: 1928,
+    0xC565: 1929,
+    0xC569: 1930,
+    0xC571: 1931,
+    0xC573: 1932,
+    0xC575: 1933,
+    0xC576: 1934,
+    0xC577: 1935,
+    0xC581: 1936,
+    0xC5A1: 1937,
+    0xC5A2: 1938,
+    0xC5A5: 1939,
+    0xC5A9: 1940,
+    0xC5B1: 1941,
+    0xC5B3: 1942,
+    0xC5B5: 1943,
+    0xC5B7: 1944,
+    0xC5C1: 1945,
+    0xC5C2: 1946,
+    0xC5C5: 1947,
+    0xC5C9: 1948,
+    0xC5D1: 1949,
+    0xC5D7: 1950,
+    0xC5E1: 1951,
+    0xC5F7: 1952,
+    0xC641: 1953,
+    0xC649: 1954,
+    0xC661: 1955,
+    0xC681: 1956,
+    0xC682: 1957,
+    0xC685: 1958,
+    0xC689: 1959,
+    0xC691: 1960,
+    0xC693: 1961,
+    0xC695: 1962,
+    0xC697: 1963,
+    0xC6A1: 1964,
+    0xC6A5: 1965,
+    0xC6A9: 1966,
+    0xC6B7: 1967,
+    0xC6C1: 1968,
+    0xC6D7: 1969,
+    0xC6E1: 1970,
+    0xC6E2: 1971,
+    0xC6E5: 1972,
+    0xC6E9: 1973,
+    0xC6F1: 1974,
+    0xC6F3: 1975,
+    0xC6F5: 1976,
+    0xC6F7: 1977,
+    0xC741: 1978,
+    0xC745: 1979,
+    0xC749: 1980,
+    0xC751: 1981,
+    0xC761: 1982,
+    0xC762: 1983,
+    0xC765: 1984,
+    0xC769: 1985,
+    0xC771: 1986,
+    0xC773: 1987,
+    0xC777: 1988,
+    0xC7A1: 1989,
+    0xC7A2: 1990,
+    0xC7A5: 1991,
+    0xC7A9: 1992,
+    0xC7B1: 1993,
+    0xC7B3: 1994,
+    0xC7B5: 1995,
+    0xC7B7: 1996,
+    0xC861: 1997,
+    0xC862: 1998,
+    0xC865: 1999,
+    0xC869: 2000,
+    0xC86A: 2001,
+    0xC871: 2002,
+    0xC873: 2003,
+    0xC875: 2004,
+    0xC876: 2005,
+    0xC877: 2006,
+    0xC881: 2007,
+    0xC882: 2008,
+    0xC885: 2009,
+    0xC889: 2010,
+    0xC891: 2011,
+    0xC893: 2012,
+    0xC895: 2013,
+    0xC896: 2014,
+    0xC897: 2015,
+    0xC8A1: 2016,
+    0xC8B7: 2017,
+    0xC8E1: 2018,
+    0xC8E2: 2019,
+    0xC8E5: 2020,
+    0xC8E9: 2021,
+    0xC8EB: 2022,
+    0xC8F1: 2023,
+    0xC8F3: 2024,
+    0xC8F5: 2025,
+    0xC8F6: 2026,
+    0xC8F7: 2027,
+    0xC941: 2028,
+    0xC942: 2029,
+    0xC945: 2030,
+    0xC949: 2031,
+    0xC951: 2032,
+    0xC953: 2033,
+    0xC955: 2034,
+    0xC957: 2035,
+    0xC961: 2036,
+    0xC965: 2037,
+    0xC976: 2038,
+    0xC981: 2039,
+    0xC985: 2040,
+    0xC9A1: 2041,
+    0xC9A2: 2042,
+    0xC9A5: 2043,
+    0xC9A9: 2044,
+    0xC9B1: 2045,
+    0xC9B3: 2046,
+    0xC9B5: 2047,
+    0xC9B7: 2048,
+    0xC9BC: 2049,
+    0xC9C1: 2050,
+    0xC9C5: 2051,
+    0xC9E1: 2052,
+    0xCA41: 2053,
+    0xCA45: 2054,
+    0xCA55: 2055,
+    0xCA57: 2056,
+    0xCA61: 2057,
+    0xCA81: 2058,
+    0xCA82: 2059,
+    0xCA85: 2060,
+    0xCA89: 2061,
+    0xCA91: 2062,
+    0xCA93: 2063,
+    0xCA95: 2064,
+    0xCA97: 2065,
+    0xCAA1: 2066,
+    0xCAB6: 2067,
+    0xCAC1: 2068,
+    0xCAE1: 2069,
+    0xCAE2: 2070,
+    0xCAE5: 2071,
+    0xCAE9: 2072,
+    0xCAF1: 2073,
+    0xCAF3: 2074,
+    0xCAF7: 2075,
+    0xCB41: 2076,
+    0xCB45: 2077,
+    0xCB49: 2078,
+    0xCB51: 2079,
+    0xCB57: 2080,
+    0xCB61: 2081,
+    0xCB62: 2082,
+    0xCB65: 2083,
+    0xCB68: 2084,
+    0xCB69: 2085,
+    0xCB6B: 2086,
+    0xCB71: 2087,
+    0xCB73: 2088,
+    0xCB75: 2089,
+    0xCB81: 2090,
+    0xCB85: 2091,
+    0xCB89: 2092,
+    0xCB91: 2093,
+    0xCB93: 2094,
+    0xCBA1: 2095,
+    0xCBA2: 2096,
+    0xCBA5: 2097,
+    0xCBA9: 2098,
+    0xCBB1: 2099,
+    0xCBB3: 2100,
+    0xCBB5: 2101,
+    0xCBB7: 2102,
+    0xCC61: 2103,
+    0xCC62: 2104,
+    0xCC63: 2105,
+    0xCC65: 2106,
+    0xCC69: 2107,
+    0xCC6B: 2108,
+    0xCC71: 2109,
+    0xCC73: 2110,
+    0xCC75: 2111,
+    0xCC76: 2112,
+    0xCC77: 2113,
+    0xCC7B: 2114,
+    0xCC81: 2115,
+    0xCC82: 2116,
+    0xCC85: 2117,
+    0xCC89: 2118,
+    0xCC91: 2119,
+    0xCC93: 2120,
+    0xCC95: 2121,
+    0xCC96: 2122,
+    0xCC97: 2123,
+    0xCCA1: 2124,
+    0xCCA2: 2125,
+    0xCCE1: 2126,
+    0xCCE2: 2127,
+    0xCCE5: 2128,
+    0xCCE9: 2129,
+    0xCCF1: 2130,
+    0xCCF3: 2131,
+    0xCCF5: 2132,
+    0xCCF6: 2133,
+    0xCCF7: 2134,
+    0xCD41: 2135,
+    0xCD42: 2136,
+    0xCD45: 2137,
+    0xCD49: 2138,
+    0xCD51: 2139,
+    0xCD53: 2140,
+    0xCD55: 2141,
+    0xCD57: 2142,
+    0xCD61: 2143,
+    0xCD65: 2144,
+    0xCD69: 2145,
+    0xCD71: 2146,
+    0xCD73: 2147,
+    0xCD76: 2148,
+    0xCD77: 2149,
+    0xCD81: 2150,
+    0xCD89: 2151,
+    0xCD93: 2152,
+    0xCD95: 2153,
+    0xCDA1: 2154,
+    0xCDA2: 2155,
+    0xCDA5: 2156,
+    0xCDA9: 2157,
+    0xCDB1: 2158,
+    0xCDB3: 2159,
+    0xCDB5: 2160,
+    0xCDB7: 2161,
+    0xCDC1: 2162,
+    0xCDD7: 2163,
+    0xCE41: 2164,
+    0xCE45: 2165,
+    0xCE61: 2166,
+    0xCE65: 2167,
+    0xCE69: 2168,
+    0xCE73: 2169,
+    0xCE75: 2170,
+    0xCE81: 2171,
+    0xCE82: 2172,
+    0xCE85: 2173,
+    0xCE88: 2174,
+    0xCE89: 2175,
+    0xCE8B: 2176,
+    0xCE91: 2177,
+    0xCE93: 2178,
+    0xCE95: 2179,
+    0xCE97: 2180,
+    0xCEA1: 2181,
+    0xCEB7: 2182,
+    0xCEE1: 2183,
+    0xCEE5: 2184,
+    0xCEE9: 2185,
+    0xCEF1: 2186,
+    0xCEF5: 2187,
+    0xCF41: 2188,
+    0xCF45: 2189,
+    0xCF49: 2190,
+    0xCF51: 2191,
+    0xCF55: 2192,
+    0xCF57: 2193,
+    0xCF61: 2194,
+    0xCF65: 2195,
+    0xCF69: 2196,
+    0xCF71: 2197,
+    0xCF73: 2198,
+    0xCF75: 2199,
+    0xCFA1: 2200,
+    0xCFA2: 2201,
+    0xCFA5: 2202,
+    0xCFA9: 2203,
+    0xCFB1: 2204,
+    0xCFB3: 2205,
+    0xCFB5: 2206,
+    0xCFB7: 2207,
+    0xD061: 2208,
+    0xD062: 2209,
+    0xD065: 2210,
+    0xD069: 2211,
+    0xD06E: 2212,
+    0xD071: 2213,
+    0xD073: 2214,
+    0xD075: 2215,
+    0xD077: 2216,
+    0xD081: 2217,
+    0xD082: 2218,
+    0xD085: 2219,
+    0xD089: 2220,
+    0xD091: 2221,
+    0xD093: 2222,
+    0xD095: 2223,
+    0xD096: 2224,
+    0xD097: 2225,
+    0xD0A1: 2226,
+    0xD0B7: 2227,
+    0xD0E1: 2228,
+    0xD0E2: 2229,
+    0xD0E5: 2230,
+    0xD0E9: 2231,
+    0xD0EB: 2232,
+    0xD0F1: 2233,
+    0xD0F3: 2234,
+    0xD0F5: 2235,
+    0xD0F7: 2236,
+    0xD141: 2237,
+    0xD142: 2238,
+    0xD145: 2239,
+    0xD149: 2240,
+    0xD151: 2241,
+    0xD153: 2242,
+    0xD155: 2243,
+    0xD157: 2244,
+    0xD161: 2245,
+    0xD162: 2246,
+    0xD165: 2247,
+    0xD169: 2248,
+    0xD171: 2249,
+    0xD173: 2250,
+    0xD175: 2251,
+    0xD176: 2252,
+    0xD177: 2253,
+    0xD181: 2254,
+    0xD185: 2255,
+    0xD189: 2256,
+    0xD193: 2257,
+    0xD1A1: 2258,
+    0xD1A2: 2259,
+    0xD1A5: 2260,
+    0xD1A9: 2261,
+    0xD1AE: 2262,
+    0xD1B1: 2263,
+    0xD1B3: 2264,
+    0xD1B5: 2265,
+    0xD1B7: 2266,
+    0xD1BB: 2267,
+    0xD1C1: 2268,
+    0xD1C2: 2269,
+    0xD1C5: 2270,
+    0xD1C9: 2271,
+    0xD1D5: 2272,
+    0xD1D7: 2273,
+    0xD1E1: 2274,
+    0xD1E2: 2275,
+    0xD1E5: 2276,
+    0xD1F5: 2277,
+    0xD1F7: 2278,
+    0xD241: 2279,
+    0xD242: 2280,
+    0xD245: 2281,
+    0xD249: 2282,
+    0xD253: 2283,
+    0xD255: 2284,
+    0xD257: 2285,
+    0xD261: 2286,
+    0xD265: 2287,
+    0xD269: 2288,
+    0xD273: 2289,
+    0xD275: 2290,
+    0xD281: 2291,
+    0xD282: 2292,
+    0xD285: 2293,
+    0xD289: 2294,
+    0xD28E: 2295,
+    0xD291: 2296,
+    0xD295: 2297,
+    0xD297: 2298,
+    0xD2A1: 2299,
+    0xD2A5: 2300,
+    0xD2A9: 2301,
+    0xD2B1: 2302,
+    0xD2B7: 2303,
+    0xD2C1: 2304,
+    0xD2C2: 2305,
+    0xD2C5: 2306,
+    0xD2C9: 2307,
+    0xD2D7: 2308,
+    0xD2E1: 2309,
+    0xD2E2: 2310,
+    0xD2E5: 2311,
+    0xD2E9: 2312,
+    0xD2F1: 2313,
+    0xD2F3: 2314,
+    0xD2F5: 2315,
+    0xD2F7: 2316,
+    0xD341: 2317,
+    0xD342: 2318,
+    0xD345: 2319,
+    0xD349: 2320,
+    0xD351: 2321,
+    0xD355: 2322,
+    0xD357: 2323,
+    0xD361: 2324,
+    0xD362: 2325,
+    0xD365: 2326,
+    0xD367: 2327,
+    0xD368: 2328,
+    0xD369: 2329,
+    0xD36A: 2330,
+    0xD371: 2331,
+    0xD373: 2332,
+    0xD375: 2333,
+    0xD377: 2334,
+    0xD37B: 2335,
+    0xD381: 2336,
+    0xD385: 2337,
+    0xD389: 2338,
+    0xD391: 2339,
+    0xD393: 2340,
+    0xD397: 2341,
+    0xD3A1: 2342,
+    0xD3A2: 2343,
+    0xD3A5: 2344,
+    0xD3A9: 2345,
+    0xD3B1: 2346,
+    0xD3B3: 2347,
+    0xD3B5: 2348,
+    0xD3B7: 2349,
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabprober.py
new file mode 100644
index 0000000..6f359d1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/johabprober.py
@@ -0,0 +1,47 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import JOHABDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import JOHAB_SM_MODEL
+
+
+class JOHABProber(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(JOHAB_SM_MODEL)
+        self.distribution_analyzer = JOHABDistributionAnalysis()
+        self.reset()
+
+    @property
+    def charset_name(self):
+        return "Johab"
+
+    @property
+    def language(self):
+        return "Korean"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jpcntx.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jpcntx.py
new file mode 100644
index 0000000..7a8e5be
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/jpcntx.py
@@ -0,0 +1,237 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Communicator client code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+
+# This is hiragana 2-char sequence table, the number in each cell represents its frequency category
+# fmt: off
+jp2_char_context = (
+    (0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1),
+    (2, 4, 0, 4, 0, 3, 0, 4, 0, 3, 4, 4, 4, 2, 4, 3, 3, 4, 3, 2, 3, 3, 4, 2, 3, 3, 3, 2, 4, 1, 4, 3, 3, 1, 5, 4, 3, 4, 3, 4, 3, 5, 3, 0, 3, 5, 4, 2, 0, 3, 1, 0, 3, 3, 0, 3, 3, 0, 1, 1, 0, 4, 3, 0, 3, 3, 0, 4, 0, 2, 0, 3, 5, 5, 5, 5, 4, 0, 4, 1, 0, 3, 4),
+    (0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2),
+    (0, 4, 0, 5, 0, 5, 0, 4, 0, 4, 5, 4, 4, 3, 5, 3, 5, 1, 5, 3, 4, 3, 4, 4, 3, 4, 3, 3, 4, 3, 5, 4, 4, 3, 5, 5, 3, 5, 5, 5, 3, 5, 5, 3, 4, 5, 5, 3, 1, 3, 2, 0, 3, 4, 0, 4, 2, 0, 4, 2, 1, 5, 3, 2, 3, 5, 0, 4, 0, 2, 0, 5, 4, 4, 5, 4, 5, 0, 4, 0, 0, 4, 4),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
+    (0, 3, 0, 4, 0, 3, 0, 3, 0, 4, 5, 4, 3, 3, 3, 3, 4, 3, 5, 4, 4, 3, 5, 4, 4, 3, 4, 3, 4, 4, 4, 4, 5, 3, 4, 4, 3, 4, 5, 5, 4, 5, 5, 1, 4, 5, 4, 3, 0, 3, 3, 1, 3, 3, 0, 4, 4, 0, 3, 3, 1, 5, 3, 3, 3, 5, 0, 4, 0, 3, 0, 4, 4, 3, 4, 3, 3, 0, 4, 1, 1, 3, 4),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
+    (0, 4, 0, 3, 0, 3, 0, 4, 0, 3, 4, 4, 3, 2, 2, 1, 2, 1, 3, 1, 3, 3, 3, 3, 3, 4, 3, 1, 3, 3, 5, 3, 3, 0, 4, 3, 0, 5, 4, 3, 3, 5, 4, 4, 3, 4, 4, 5, 0, 1, 2, 0, 1, 2, 0, 2, 2, 0, 1, 0, 0, 5, 2, 2, 1, 4, 0, 3, 0, 1, 0, 4, 4, 3, 5, 4, 3, 0, 2, 1, 0, 4, 3),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
+    (0, 3, 0, 5, 0, 4, 0, 2, 1, 4, 4, 2, 4, 1, 4, 2, 4, 2, 4, 3, 3, 3, 4, 3, 3, 3, 3, 1, 4, 2, 3, 3, 3, 1, 4, 4, 1, 1, 1, 4, 3, 3, 2, 0, 2, 4, 3, 2, 0, 3, 3, 0, 3, 1, 1, 0, 0, 0, 3, 3, 0, 4, 2, 2, 3, 4, 0, 4, 0, 3, 0, 4, 4, 5, 3, 4, 4, 0, 3, 0, 0, 1, 4),
+    (1, 4, 0, 4, 0, 4, 0, 4, 0, 3, 5, 4, 4, 3, 4, 3, 5, 4, 3, 3, 4, 3, 5, 4, 4, 4, 4, 3, 4, 2, 4, 3, 3, 1, 5, 4, 3, 2, 4, 5, 4, 5, 5, 4, 4, 5, 4, 4, 0, 3, 2, 2, 3, 3, 0, 4, 3, 1, 3, 2, 1, 4, 3, 3, 4, 5, 0, 3, 0, 2, 0, 4, 5, 5, 4, 5, 4, 0, 4, 0, 0, 5, 4),
+    (0, 5, 0, 5, 0, 4, 0, 3, 0, 4, 4, 3, 4, 3, 3, 3, 4, 0, 4, 4, 4, 3, 4, 3, 4, 3, 3, 1, 4, 2, 4, 3, 4, 0, 5, 4, 1, 4, 5, 4, 4, 5, 3, 2, 4, 3, 4, 3, 2, 4, 1, 3, 3, 3, 2, 3, 2, 0, 4, 3, 3, 4, 3, 3, 3, 4, 0, 4, 0, 3, 0, 4, 5, 4, 4, 4, 3, 0, 4, 1, 0, 1, 3),
+    (0, 3, 1, 4, 0, 3, 0, 2, 0, 3, 4, 4, 3, 1, 4, 2, 3, 3, 4, 3, 4, 3, 4, 3, 4, 4, 3, 2, 3, 1, 5, 4, 4, 1, 4, 4, 3, 5, 4, 4, 3, 5, 5, 4, 3, 4, 4, 3, 1, 2, 3, 1, 2, 2, 0, 3, 2, 0, 3, 1, 0, 5, 3, 3, 3, 4, 3, 3, 3, 3, 4, 4, 4, 4, 5, 4, 2, 0, 3, 3, 2, 4, 3),
+    (0, 2, 0, 3, 0, 1, 0, 1, 0, 0, 3, 2, 0, 0, 2, 0, 1, 0, 2, 1, 3, 3, 3, 1, 2, 3, 1, 0, 1, 0, 4, 2, 1, 1, 3, 3, 0, 4, 3, 3, 1, 4, 3, 3, 0, 3, 3, 2, 0, 0, 0, 0, 1, 0, 0, 2, 0, 0, 0, 0, 0, 4, 1, 0, 2, 3, 2, 2, 2, 1, 3, 3, 3, 4, 4, 3, 2, 0, 3, 1, 0, 3, 3),
+    (0, 4, 0, 4, 0, 3, 0, 3, 0, 4, 4, 4, 3, 3, 3, 3, 3, 3, 4, 3, 4, 2, 4, 3, 4, 3, 3, 2, 4, 3, 4, 5, 4, 1, 4, 5, 3, 5, 4, 5, 3, 5, 4, 0, 3, 5, 5, 3, 1, 3, 3, 2, 2, 3, 0, 3, 4, 1, 3, 3, 2, 4, 3, 3, 3, 4, 0, 4, 0, 3, 0, 4, 5, 4, 4, 5, 3, 0, 4, 1, 0, 3, 4),
+    (0, 2, 0, 3, 0, 3, 0, 0, 0, 2, 2, 2, 1, 0, 1, 0, 0, 0, 3, 0, 3, 0, 3, 0, 1, 3, 1, 0, 3, 1, 3, 3, 3, 1, 3, 3, 3, 0, 1, 3, 1, 3, 4, 0, 0, 3, 1, 1, 0, 3, 2, 0, 0, 0, 0, 1, 3, 0, 1, 0, 0, 3, 3, 2, 0, 3, 0, 0, 0, 0, 0, 3, 4, 3, 4, 3, 3, 0, 3, 0, 0, 2, 3),
+    (2, 3, 0, 3, 0, 2, 0, 1, 0, 3, 3, 4, 3, 1, 3, 1, 1, 1, 3, 1, 4, 3, 4, 3, 3, 3, 0, 0, 3, 1, 5, 4, 3, 1, 4, 3, 2, 5, 5, 4, 4, 4, 4, 3, 3, 4, 4, 4, 0, 2, 1, 1, 3, 2, 0, 1, 2, 0, 0, 1, 0, 4, 1, 3, 3, 3, 0, 3, 0, 1, 0, 4, 4, 4, 5, 5, 3, 0, 2, 0, 0, 4, 4),
+    (0, 2, 0, 1, 0, 3, 1, 3, 0, 2, 3, 3, 3, 0, 3, 1, 0, 0, 3, 0, 3, 2, 3, 1, 3, 2, 1, 1, 0, 0, 4, 2, 1, 0, 2, 3, 1, 4, 3, 2, 0, 4, 4, 3, 1, 3, 1, 3, 0, 1, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 4, 1, 1, 1, 2, 0, 3, 0, 0, 0, 3, 4, 2, 4, 3, 2, 0, 1, 0, 0, 3, 3),
+    (0, 1, 0, 4, 0, 5, 0, 4, 0, 2, 4, 4, 2, 3, 3, 2, 3, 3, 5, 3, 3, 3, 4, 3, 4, 2, 3, 0, 4, 3, 3, 3, 4, 1, 4, 3, 2, 1, 5, 5, 3, 4, 5, 1, 3, 5, 4, 2, 0, 3, 3, 0, 1, 3, 0, 4, 2, 0, 1, 3, 1, 4, 3, 3, 3, 3, 0, 3, 0, 1, 0, 3, 4, 4, 4, 5, 5, 0, 3, 0, 1, 4, 5),
+    (0, 2, 0, 3, 0, 3, 0, 0, 0, 2, 3, 1, 3, 0, 4, 0, 1, 1, 3, 0, 3, 4, 3, 2, 3, 1, 0, 3, 3, 2, 3, 1, 3, 0, 2, 3, 0, 2, 1, 4, 1, 2, 2, 0, 0, 3, 3, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 0, 2, 2, 0, 3, 2, 1, 3, 3, 0, 2, 0, 2, 0, 0, 3, 3, 1, 2, 4, 0, 3, 0, 2, 2, 3),
+    (2, 4, 0, 5, 0, 4, 0, 4, 0, 2, 4, 4, 4, 3, 4, 3, 3, 3, 1, 2, 4, 3, 4, 3, 4, 4, 5, 0, 3, 3, 3, 3, 2, 0, 4, 3, 1, 4, 3, 4, 1, 4, 4, 3, 3, 4, 4, 3, 1, 2, 3, 0, 4, 2, 0, 4, 1, 0, 3, 3, 0, 4, 3, 3, 3, 4, 0, 4, 0, 2, 0, 3, 5, 3, 4, 5, 2, 0, 3, 0, 0, 4, 5),
+    (0, 3, 0, 4, 0, 1, 0, 1, 0, 1, 3, 2, 2, 1, 3, 0, 3, 0, 2, 0, 2, 0, 3, 0, 2, 0, 0, 0, 1, 0, 1, 1, 0, 0, 3, 1, 0, 0, 0, 4, 0, 3, 1, 0, 2, 1, 3, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4, 2, 2, 3, 1, 0, 3, 0, 0, 0, 1, 4, 4, 4, 3, 0, 0, 4, 0, 0, 1, 4),
+    (1, 4, 1, 5, 0, 3, 0, 3, 0, 4, 5, 4, 4, 3, 5, 3, 3, 4, 4, 3, 4, 1, 3, 3, 3, 3, 2, 1, 4, 1, 5, 4, 3, 1, 4, 4, 3, 5, 4, 4, 3, 5, 4, 3, 3, 4, 4, 4, 0, 3, 3, 1, 2, 3, 0, 3, 1, 0, 3, 3, 0, 5, 4, 4, 4, 4, 4, 4, 3, 3, 5, 4, 4, 3, 3, 5, 4, 0, 3, 2, 0, 4, 4),
+    (0, 2, 0, 3, 0, 1, 0, 0, 0, 1, 3, 3, 3, 2, 4, 1, 3, 0, 3, 1, 3, 0, 2, 2, 1, 1, 0, 0, 2, 0, 4, 3, 1, 0, 4, 3, 0, 4, 4, 4, 1, 4, 3, 1, 1, 3, 3, 1, 0, 2, 0, 0, 1, 3, 0, 0, 0, 0, 2, 0, 0, 4, 3, 2, 4, 3, 5, 4, 3, 3, 3, 4, 3, 3, 4, 3, 3, 0, 2, 1, 0, 3, 3),
+    (0, 2, 0, 4, 0, 3, 0, 2, 0, 2, 5, 5, 3, 4, 4, 4, 4, 1, 4, 3, 3, 0, 4, 3, 4, 3, 1, 3, 3, 2, 4, 3, 0, 3, 4, 3, 0, 3, 4, 4, 2, 4, 4, 0, 4, 5, 3, 3, 2, 2, 1, 1, 1, 2, 0, 1, 5, 0, 3, 3, 2, 4, 3, 3, 3, 4, 0, 3, 0, 2, 0, 4, 4, 3, 5, 5, 0, 0, 3, 0, 2, 3, 3),
+    (0, 3, 0, 4, 0, 3, 0, 1, 0, 3, 4, 3, 3, 1, 3, 3, 3, 0, 3, 1, 3, 0, 4, 3, 3, 1, 1, 0, 3, 0, 3, 3, 0, 0, 4, 4, 0, 1, 5, 4, 3, 3, 5, 0, 3, 3, 4, 3, 0, 2, 0, 1, 1, 1, 0, 1, 3, 0, 1, 2, 1, 3, 3, 2, 3, 3, 0, 3, 0, 1, 0, 1, 3, 3, 4, 4, 1, 0, 1, 2, 2, 1, 3),
+    (0, 1, 0, 4, 0, 4, 0, 3, 0, 1, 3, 3, 3, 2, 3, 1, 1, 0, 3, 0, 3, 3, 4, 3, 2, 4, 2, 0, 1, 0, 4, 3, 2, 0, 4, 3, 0, 5, 3, 3, 2, 4, 4, 4, 3, 3, 3, 4, 0, 1, 3, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 4, 2, 3, 3, 3, 0, 3, 0, 0, 0, 4, 4, 4, 5, 3, 2, 0, 3, 3, 0, 3, 5),
+    (0, 2, 0, 3, 0, 0, 0, 3, 0, 1, 3, 0, 2, 0, 0, 0, 1, 0, 3, 1, 1, 3, 3, 0, 0, 3, 0, 0, 3, 0, 2, 3, 1, 0, 3, 1, 0, 3, 3, 2, 0, 4, 2, 2, 0, 2, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 2, 0, 1, 0, 1, 0, 0, 0, 1, 3, 1, 2, 0, 0, 0, 1, 0, 0, 1, 4),
+    (0, 3, 0, 3, 0, 5, 0, 1, 0, 2, 4, 3, 1, 3, 3, 2, 1, 1, 5, 2, 1, 0, 5, 1, 2, 0, 0, 0, 3, 3, 2, 2, 3, 2, 4, 3, 0, 0, 3, 3, 1, 3, 3, 0, 2, 5, 3, 4, 0, 3, 3, 0, 1, 2, 0, 2, 2, 0, 3, 2, 0, 2, 2, 3, 3, 3, 0, 2, 0, 1, 0, 3, 4, 4, 2, 5, 4, 0, 3, 0, 0, 3, 5),
+    (0, 3, 0, 3, 0, 3, 0, 1, 0, 3, 3, 3, 3, 0, 3, 0, 2, 0, 2, 1, 1, 0, 2, 0, 1, 0, 0, 0, 2, 1, 0, 0, 1, 0, 3, 2, 0, 0, 3, 3, 1, 2, 3, 1, 0, 3, 3, 0, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 2, 3, 1, 2, 3, 0, 3, 0, 1, 0, 3, 2, 1, 0, 4, 3, 0, 1, 1, 0, 3, 3),
+    (0, 4, 0, 5, 0, 3, 0, 3, 0, 4, 5, 5, 4, 3, 5, 3, 4, 3, 5, 3, 3, 2, 5, 3, 4, 4, 4, 3, 4, 3, 4, 5, 5, 3, 4, 4, 3, 4, 4, 5, 4, 4, 4, 3, 4, 5, 5, 4, 2, 3, 4, 2, 3, 4, 0, 3, 3, 1, 4, 3, 2, 4, 3, 3, 5, 5, 0, 3, 0, 3, 0, 5, 5, 5, 5, 4, 4, 0, 4, 0, 1, 4, 4),
+    (0, 4, 0, 4, 0, 3, 0, 3, 0, 3, 5, 4, 4, 2, 3, 2, 5, 1, 3, 2, 5, 1, 4, 2, 3, 2, 3, 3, 4, 3, 3, 3, 3, 2, 5, 4, 1, 3, 3, 5, 3, 4, 4, 0, 4, 4, 3, 1, 1, 3, 1, 0, 2, 3, 0, 2, 3, 0, 3, 0, 0, 4, 3, 1, 3, 4, 0, 3, 0, 2, 0, 4, 4, 4, 3, 4, 5, 0, 4, 0, 0, 3, 4),
+    (0, 3, 0, 3, 0, 3, 1, 2, 0, 3, 4, 4, 3, 3, 3, 0, 2, 2, 4, 3, 3, 1, 3, 3, 3, 1, 1, 0, 3, 1, 4, 3, 2, 3, 4, 4, 2, 4, 4, 4, 3, 4, 4, 3, 2, 4, 4, 3, 1, 3, 3, 1, 3, 3, 0, 4, 1, 0, 2, 2, 1, 4, 3, 2, 3, 3, 5, 4, 3, 3, 5, 4, 4, 3, 3, 0, 4, 0, 3, 2, 2, 4, 4),
+    (0, 2, 0, 1, 0, 0, 0, 0, 0, 1, 2, 1, 3, 0, 0, 0, 0, 0, 2, 0, 1, 2, 1, 0, 0, 1, 0, 0, 0, 0, 3, 0, 0, 1, 0, 1, 1, 3, 1, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 2, 0, 3, 4, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1),
+    (0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 4, 0, 4, 1, 4, 0, 3, 0, 4, 0, 3, 0, 4, 0, 3, 0, 3, 0, 4, 1, 5, 1, 4, 0, 0, 3, 0, 5, 0, 5, 2, 0, 1, 0, 0, 0, 2, 1, 4, 0, 1, 3, 0, 0, 3, 0, 0, 3, 1, 1, 4, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0),
+    (1, 4, 0, 5, 0, 3, 0, 2, 0, 3, 5, 4, 4, 3, 4, 3, 5, 3, 4, 3, 3, 0, 4, 3, 3, 3, 3, 3, 3, 2, 4, 4, 3, 1, 3, 4, 4, 5, 4, 4, 3, 4, 4, 1, 3, 5, 4, 3, 3, 3, 1, 2, 2, 3, 3, 1, 3, 1, 3, 3, 3, 5, 3, 3, 4, 5, 0, 3, 0, 3, 0, 3, 4, 3, 4, 4, 3, 0, 3, 0, 2, 4, 3),
+    (0, 1, 0, 4, 0, 0, 0, 0, 0, 1, 4, 0, 4, 1, 4, 2, 4, 0, 3, 0, 1, 0, 1, 0, 0, 0, 0, 0, 2, 0, 3, 1, 1, 1, 0, 3, 0, 0, 0, 1, 2, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 0, 3, 0, 0, 0, 0, 3, 2, 0, 2, 2, 0, 1, 0, 0, 0, 2, 3, 2, 3, 3, 0, 0, 0, 0, 2, 1, 0),
+    (0, 5, 1, 5, 0, 3, 0, 3, 0, 5, 4, 4, 5, 1, 5, 3, 3, 0, 4, 3, 4, 3, 5, 3, 4, 3, 3, 2, 4, 3, 4, 3, 3, 0, 3, 3, 1, 4, 4, 3, 4, 4, 4, 3, 4, 5, 5, 3, 2, 3, 1, 1, 3, 3, 1, 3, 1, 1, 3, 3, 2, 4, 5, 3, 3, 5, 0, 4, 0, 3, 0, 4, 4, 3, 5, 3, 3, 0, 3, 4, 0, 4, 3),
+    (0, 5, 0, 5, 0, 3, 0, 2, 0, 4, 4, 3, 5, 2, 4, 3, 3, 3, 4, 4, 4, 3, 5, 3, 5, 3, 3, 1, 4, 0, 4, 3, 3, 0, 3, 3, 0, 4, 4, 4, 4, 5, 4, 3, 3, 5, 5, 3, 2, 3, 1, 2, 3, 2, 0, 1, 0, 0, 3, 2, 2, 4, 4, 3, 1, 5, 0, 4, 0, 3, 0, 4, 3, 1, 3, 2, 1, 0, 3, 3, 0, 3, 3),
+    (0, 4, 0, 5, 0, 5, 0, 4, 0, 4, 5, 5, 5, 3, 4, 3, 3, 2, 5, 4, 4, 3, 5, 3, 5, 3, 4, 0, 4, 3, 4, 4, 3, 2, 4, 4, 3, 4, 5, 4, 4, 5, 5, 0, 3, 5, 5, 4, 1, 3, 3, 2, 3, 3, 1, 3, 1, 0, 4, 3, 1, 4, 4, 3, 4, 5, 0, 4, 0, 2, 0, 4, 3, 4, 4, 3, 3, 0, 4, 0, 0, 5, 5),
+    (0, 4, 0, 4, 0, 5, 0, 1, 1, 3, 3, 4, 4, 3, 4, 1, 3, 0, 5, 1, 3, 0, 3, 1, 3, 1, 1, 0, 3, 0, 3, 3, 4, 0, 4, 3, 0, 4, 4, 4, 3, 4, 4, 0, 3, 5, 4, 1, 0, 3, 0, 0, 2, 3, 0, 3, 1, 0, 3, 1, 0, 3, 2, 1, 3, 5, 0, 3, 0, 1, 0, 3, 2, 3, 3, 4, 4, 0, 2, 2, 0, 4, 4),
+    (2, 4, 0, 5, 0, 4, 0, 3, 0, 4, 5, 5, 4, 3, 5, 3, 5, 3, 5, 3, 5, 2, 5, 3, 4, 3, 3, 4, 3, 4, 5, 3, 2, 1, 5, 4, 3, 2, 3, 4, 5, 3, 4, 1, 2, 5, 4, 3, 0, 3, 3, 0, 3, 2, 0, 2, 3, 0, 4, 1, 0, 3, 4, 3, 3, 5, 0, 3, 0, 1, 0, 4, 5, 5, 5, 4, 3, 0, 4, 2, 0, 3, 5),
+    (0, 5, 0, 4, 0, 4, 0, 2, 0, 5, 4, 3, 4, 3, 4, 3, 3, 3, 4, 3, 4, 2, 5, 3, 5, 3, 4, 1, 4, 3, 4, 4, 4, 0, 3, 5, 0, 4, 4, 4, 4, 5, 3, 1, 3, 4, 5, 3, 3, 3, 3, 3, 3, 3, 0, 2, 2, 0, 3, 3, 2, 4, 3, 3, 3, 5, 3, 4, 1, 3, 3, 5, 3, 2, 0, 0, 0, 0, 4, 3, 1, 3, 3),
+    (0, 1, 0, 3, 0, 3, 0, 1, 0, 1, 3, 3, 3, 2, 3, 3, 3, 0, 3, 0, 0, 0, 3, 1, 3, 0, 0, 0, 2, 2, 2, 3, 0, 0, 3, 2, 0, 1, 2, 4, 1, 3, 3, 0, 0, 3, 3, 3, 0, 1, 0, 0, 2, 1, 0, 0, 3, 0, 3, 1, 0, 3, 0, 0, 1, 3, 0, 2, 0, 1, 0, 3, 3, 1, 3, 3, 0, 0, 1, 1, 0, 3, 3),
+    (0, 2, 0, 3, 0, 2, 1, 4, 0, 2, 2, 3, 1, 1, 3, 1, 1, 0, 2, 0, 3, 1, 2, 3, 1, 3, 0, 0, 1, 0, 4, 3, 2, 3, 3, 3, 1, 4, 2, 3, 3, 3, 3, 1, 0, 3, 1, 4, 0, 1, 1, 0, 1, 2, 0, 1, 1, 0, 1, 1, 0, 3, 1, 3, 2, 2, 0, 1, 0, 0, 0, 2, 3, 3, 3, 1, 0, 0, 0, 0, 0, 2, 3),
+    (0, 5, 0, 4, 0, 5, 0, 2, 0, 4, 5, 5, 3, 3, 4, 3, 3, 1, 5, 4, 4, 2, 4, 4, 4, 3, 4, 2, 4, 3, 5, 5, 4, 3, 3, 4, 3, 3, 5, 5, 4, 5, 5, 1, 3, 4, 5, 3, 1, 4, 3, 1, 3, 3, 0, 3, 3, 1, 4, 3, 1, 4, 5, 3, 3, 5, 0, 4, 0, 3, 0, 5, 3, 3, 1, 4, 3, 0, 4, 0, 1, 5, 3),
+    (0, 5, 0, 5, 0, 4, 0, 2, 0, 4, 4, 3, 4, 3, 3, 3, 3, 3, 5, 4, 4, 4, 4, 4, 4, 5, 3, 3, 5, 2, 4, 4, 4, 3, 4, 4, 3, 3, 4, 4, 5, 5, 3, 3, 4, 3, 4, 3, 3, 4, 3, 3, 3, 3, 1, 2, 2, 1, 4, 3, 3, 5, 4, 4, 3, 4, 0, 4, 0, 3, 0, 4, 4, 4, 4, 4, 1, 0, 4, 2, 0, 2, 4),
+    (0, 4, 0, 4, 0, 3, 0, 1, 0, 3, 5, 2, 3, 0, 3, 0, 2, 1, 4, 2, 3, 3, 4, 1, 4, 3, 3, 2, 4, 1, 3, 3, 3, 0, 3, 3, 0, 0, 3, 3, 3, 5, 3, 3, 3, 3, 3, 2, 0, 2, 0, 0, 2, 0, 0, 2, 0, 0, 1, 0, 0, 3, 1, 2, 2, 3, 0, 3, 0, 2, 0, 4, 4, 3, 3, 4, 1, 0, 3, 0, 0, 2, 4),
+    (0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 2, 0, 0, 0, 0, 0, 1, 0, 2, 0, 1, 0, 0, 0, 0, 0, 3, 1, 3, 0, 3, 2, 0, 0, 0, 1, 0, 3, 2, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 4, 0, 2, 0, 0, 0, 0, 0, 0, 2),
+    (0, 2, 1, 3, 0, 2, 0, 2, 0, 3, 3, 3, 3, 1, 3, 1, 3, 3, 3, 3, 3, 3, 4, 2, 2, 1, 2, 1, 4, 0, 4, 3, 1, 3, 3, 3, 2, 4, 3, 5, 4, 3, 3, 3, 3, 3, 3, 3, 0, 1, 3, 0, 2, 0, 0, 1, 0, 0, 1, 0, 0, 4, 2, 0, 2, 3, 0, 3, 3, 0, 3, 3, 4, 2, 3, 1, 4, 0, 1, 2, 0, 2, 3),
+    (0, 3, 0, 3, 0, 1, 0, 3, 0, 2, 3, 3, 3, 0, 3, 1, 2, 0, 3, 3, 2, 3, 3, 2, 3, 2, 3, 1, 3, 0, 4, 3, 2, 0, 3, 3, 1, 4, 3, 3, 2, 3, 4, 3, 1, 3, 3, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 4, 1, 1, 0, 3, 0, 3, 1, 0, 2, 3, 3, 3, 3, 3, 1, 0, 0, 2, 0, 3, 3),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 2, 0, 3, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 3, 0, 3, 0, 3, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 2, 0, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 3),
+    (0, 2, 0, 3, 1, 3, 0, 3, 0, 2, 3, 3, 3, 1, 3, 1, 3, 1, 3, 1, 3, 3, 3, 1, 3, 0, 2, 3, 1, 1, 4, 3, 3, 2, 3, 3, 1, 2, 2, 4, 1, 3, 3, 0, 1, 4, 2, 3, 0, 1, 3, 0, 3, 0, 0, 1, 3, 0, 2, 0, 0, 3, 3, 2, 1, 3, 0, 3, 0, 2, 0, 3, 4, 4, 4, 3, 1, 0, 3, 0, 0, 3, 3),
+    (0, 2, 0, 1, 0, 2, 0, 0, 0, 1, 3, 2, 2, 1, 3, 0, 1, 1, 3, 0, 3, 2, 3, 1, 2, 0, 2, 0, 1, 1, 3, 3, 3, 0, 3, 3, 1, 1, 2, 3, 2, 3, 3, 1, 2, 3, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 3, 0, 1, 0, 0, 2, 1, 2, 1, 3, 0, 3, 0, 0, 0, 3, 4, 4, 4, 3, 2, 0, 2, 0, 0, 2, 4),
+    (0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 3, 1, 0, 0, 0, 0, 0, 0, 0, 3),
+    (0, 3, 0, 3, 0, 2, 0, 3, 0, 3, 3, 3, 2, 3, 2, 2, 2, 0, 3, 1, 3, 3, 3, 2, 3, 3, 0, 0, 3, 0, 3, 2, 2, 0, 2, 3, 1, 4, 3, 4, 3, 3, 2, 3, 1, 5, 4, 4, 0, 3, 1, 2, 1, 3, 0, 3, 1, 1, 2, 0, 2, 3, 1, 3, 1, 3, 0, 3, 0, 1, 0, 3, 3, 4, 4, 2, 1, 0, 2, 1, 0, 2, 4),
+    (0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 4, 2, 5, 1, 4, 0, 2, 0, 2, 1, 3, 1, 4, 0, 2, 1, 0, 0, 2, 1, 4, 1, 1, 0, 3, 3, 0, 5, 1, 3, 2, 3, 3, 1, 0, 3, 2, 3, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 4, 0, 1, 0, 3, 0, 2, 0, 1, 0, 3, 3, 3, 4, 3, 3, 0, 0, 0, 0, 2, 3),
+    (0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 1, 0, 0, 1, 0, 0, 0, 0, 0, 3),
+    (0, 1, 0, 3, 0, 4, 0, 3, 0, 2, 4, 3, 1, 0, 3, 2, 2, 1, 3, 1, 2, 2, 3, 1, 1, 1, 2, 1, 3, 0, 1, 2, 0, 1, 3, 2, 1, 3, 0, 5, 5, 1, 0, 0, 1, 3, 2, 1, 0, 3, 0, 0, 1, 0, 0, 0, 0, 0, 3, 4, 0, 1, 1, 1, 3, 2, 0, 2, 0, 1, 0, 2, 3, 3, 1, 2, 3, 0, 1, 0, 1, 0, 4),
+    (0, 0, 0, 1, 0, 3, 0, 3, 0, 2, 2, 1, 0, 0, 4, 0, 3, 0, 3, 1, 3, 0, 3, 0, 3, 0, 1, 0, 3, 0, 3, 1, 3, 0, 3, 3, 0, 0, 1, 2, 1, 1, 1, 0, 1, 2, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 1, 2, 0, 0, 2, 0, 0, 0, 0, 2, 3, 3, 3, 3, 0, 0, 0, 0, 1, 4),
+    (0, 0, 0, 3, 0, 3, 0, 0, 0, 0, 3, 1, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 3, 0, 2, 0, 2, 3, 0, 0, 2, 2, 3, 1, 2, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 2, 0, 0, 0, 0, 2, 3),
+    (2, 4, 0, 5, 0, 5, 0, 4, 0, 3, 4, 3, 3, 3, 4, 3, 3, 3, 4, 3, 4, 4, 5, 4, 5, 5, 5, 2, 3, 0, 5, 5, 4, 1, 5, 4, 3, 1, 5, 4, 3, 4, 4, 3, 3, 4, 3, 3, 0, 3, 2, 0, 2, 3, 0, 3, 0, 0, 3, 3, 0, 5, 3, 2, 3, 3, 0, 3, 0, 3, 0, 3, 4, 5, 4, 5, 3, 0, 4, 3, 0, 3, 4),
+    (0, 3, 0, 3, 0, 3, 0, 3, 0, 3, 3, 4, 3, 2, 3, 2, 3, 0, 4, 3, 3, 3, 3, 3, 3, 3, 3, 0, 3, 2, 4, 3, 3, 1, 3, 4, 3, 4, 4, 4, 3, 4, 4, 3, 2, 4, 4, 1, 0, 2, 0, 0, 1, 1, 0, 2, 0, 0, 3, 1, 0, 5, 3, 2, 1, 3, 0, 3, 0, 1, 2, 4, 3, 2, 4, 3, 3, 0, 3, 2, 0, 4, 4),
+    (0, 3, 0, 3, 0, 1, 0, 0, 0, 1, 4, 3, 3, 2, 3, 1, 3, 1, 4, 2, 3, 2, 4, 2, 3, 4, 3, 0, 2, 2, 3, 3, 3, 0, 3, 3, 3, 0, 3, 4, 1, 3, 3, 0, 3, 4, 3, 3, 0, 1, 1, 0, 1, 0, 0, 0, 4, 0, 3, 0, 0, 3, 1, 2, 1, 3, 0, 4, 0, 1, 0, 4, 3, 3, 4, 3, 3, 0, 2, 0, 0, 3, 3),
+    (0, 3, 0, 4, 0, 1, 0, 3, 0, 3, 4, 3, 3, 0, 3, 3, 3, 1, 3, 1, 3, 3, 4, 3, 3, 3, 0, 0, 3, 1, 5, 3, 3, 1, 3, 3, 2, 5, 4, 3, 3, 4, 5, 3, 2, 5, 3, 4, 0, 1, 0, 0, 0, 0, 0, 2, 0, 0, 1, 1, 0, 4, 2, 2, 1, 3, 0, 3, 0, 2, 0, 4, 4, 3, 5, 3, 2, 0, 1, 1, 0, 3, 4),
+    (0, 5, 0, 4, 0, 5, 0, 2, 0, 4, 4, 3, 3, 2, 3, 3, 3, 1, 4, 3, 4, 1, 5, 3, 4, 3, 4, 0, 4, 2, 4, 3, 4, 1, 5, 4, 0, 4, 4, 4, 4, 5, 4, 1, 3, 5, 4, 2, 1, 4, 1, 1, 3, 2, 0, 3, 1, 0, 3, 2, 1, 4, 3, 3, 3, 4, 0, 4, 0, 3, 0, 4, 4, 4, 3, 3, 3, 0, 4, 2, 0, 3, 4),
+    (1, 4, 0, 4, 0, 3, 0, 1, 0, 3, 3, 3, 1, 1, 3, 3, 2, 2, 3, 3, 1, 0, 3, 2, 2, 1, 2, 0, 3, 1, 2, 1, 2, 0, 3, 2, 0, 2, 2, 3, 3, 4, 3, 0, 3, 3, 1, 2, 0, 1, 1, 3, 1, 2, 0, 0, 3, 0, 1, 1, 0, 3, 2, 2, 3, 3, 0, 3, 0, 0, 0, 2, 3, 3, 4, 3, 3, 0, 1, 0, 0, 1, 4),
+    (0, 4, 0, 4, 0, 4, 0, 0, 0, 3, 4, 4, 3, 1, 4, 2, 3, 2, 3, 3, 3, 1, 4, 3, 4, 0, 3, 0, 4, 2, 3, 3, 2, 2, 5, 4, 2, 1, 3, 4, 3, 4, 3, 1, 3, 3, 4, 2, 0, 2, 1, 0, 3, 3, 0, 0, 2, 0, 3, 1, 0, 4, 4, 3, 4, 3, 0, 4, 0, 1, 0, 2, 4, 4, 4, 4, 4, 0, 3, 2, 0, 3, 3),
+    (0, 0, 0, 1, 0, 4, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 3, 2, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 2),
+    (0, 2, 0, 3, 0, 4, 0, 4, 0, 1, 3, 3, 3, 0, 4, 0, 2, 1, 2, 1, 1, 1, 2, 0, 3, 1, 1, 0, 1, 0, 3, 1, 0, 0, 3, 3, 2, 0, 1, 1, 0, 0, 0, 0, 0, 1, 0, 2, 0, 2, 2, 0, 3, 1, 0, 0, 1, 0, 1, 1, 0, 1, 2, 0, 3, 0, 0, 0, 0, 1, 0, 0, 3, 3, 4, 3, 1, 0, 1, 0, 3, 0, 2),
+    (0, 0, 0, 3, 0, 5, 0, 0, 0, 0, 1, 0, 2, 0, 3, 1, 0, 1, 3, 0, 0, 0, 2, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 0, 4, 0, 0, 0, 2, 3, 0, 1, 4, 1, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 3, 0, 0, 0, 0, 0, 3),
+    (0, 2, 0, 5, 0, 5, 0, 1, 0, 2, 4, 3, 3, 2, 5, 1, 3, 2, 3, 3, 3, 0, 4, 1, 2, 0, 3, 0, 4, 0, 2, 2, 1, 1, 5, 3, 0, 0, 1, 4, 2, 3, 2, 0, 3, 3, 3, 2, 0, 2, 4, 1, 1, 2, 0, 1, 1, 0, 3, 1, 0, 1, 3, 1, 2, 3, 0, 2, 0, 0, 0, 1, 3, 5, 4, 4, 4, 0, 3, 0, 0, 1, 3),
+    (0, 4, 0, 5, 0, 4, 0, 4, 0, 4, 5, 4, 3, 3, 4, 3, 3, 3, 4, 3, 4, 4, 5, 3, 4, 5, 4, 2, 4, 2, 3, 4, 3, 1, 4, 4, 1, 3, 5, 4, 4, 5, 5, 4, 4, 5, 5, 5, 2, 3, 3, 1, 4, 3, 1, 3, 3, 0, 3, 3, 1, 4, 3, 4, 4, 4, 0, 3, 0, 4, 0, 3, 3, 4, 4, 5, 0, 0, 4, 3, 0, 4, 5),
+    (0, 4, 0, 4, 0, 3, 0, 3, 0, 3, 4, 4, 4, 3, 3, 2, 4, 3, 4, 3, 4, 3, 5, 3, 4, 3, 2, 1, 4, 2, 4, 4, 3, 1, 3, 4, 2, 4, 5, 5, 3, 4, 5, 4, 1, 5, 4, 3, 0, 3, 2, 2, 3, 2, 1, 3, 1, 0, 3, 3, 3, 5, 3, 3, 3, 5, 4, 4, 2, 3, 3, 4, 3, 3, 3, 2, 1, 0, 3, 2, 1, 4, 3),
+    (0, 4, 0, 5, 0, 4, 0, 3, 0, 3, 5, 5, 3, 2, 4, 3, 4, 0, 5, 4, 4, 1, 4, 4, 4, 3, 3, 3, 4, 3, 5, 5, 2, 3, 3, 4, 1, 2, 5, 5, 3, 5, 5, 2, 3, 5, 5, 4, 0, 3, 2, 0, 3, 3, 1, 1, 5, 1, 4, 1, 0, 4, 3, 2, 3, 5, 0, 4, 0, 3, 0, 5, 4, 3, 4, 3, 0, 0, 4, 1, 0, 4, 4),
+    (1, 3, 0, 4, 0, 2, 0, 2, 0, 2, 5, 5, 3, 3, 3, 3, 3, 0, 4, 2, 3, 4, 4, 4, 3, 4, 0, 0, 3, 4, 5, 4, 3, 3, 3, 3, 2, 5, 5, 4, 5, 5, 5, 4, 3, 5, 5, 5, 1, 3, 1, 0, 1, 0, 0, 3, 2, 0, 4, 2, 0, 5, 2, 3, 2, 4, 1, 3, 0, 3, 0, 4, 5, 4, 5, 4, 3, 0, 4, 2, 0, 5, 4),
+    (0, 3, 0, 4, 0, 5, 0, 3, 0, 3, 4, 4, 3, 2, 3, 2, 3, 3, 3, 3, 3, 2, 4, 3, 3, 2, 2, 0, 3, 3, 3, 3, 3, 1, 3, 3, 3, 0, 4, 4, 3, 4, 4, 1, 1, 4, 4, 2, 0, 3, 1, 0, 1, 1, 0, 4, 1, 0, 2, 3, 1, 3, 3, 1, 3, 4, 0, 3, 0, 1, 0, 3, 1, 3, 0, 0, 1, 0, 2, 0, 0, 4, 4),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
+    (0, 3, 0, 3, 0, 2, 0, 3, 0, 1, 5, 4, 3, 3, 3, 1, 4, 2, 1, 2, 3, 4, 4, 2, 4, 4, 5, 0, 3, 1, 4, 3, 4, 0, 4, 3, 3, 3, 2, 3, 2, 5, 3, 4, 3, 2, 2, 3, 0, 0, 3, 0, 2, 1, 0, 1, 2, 0, 0, 0, 0, 2, 1, 1, 3, 1, 0, 2, 0, 4, 0, 3, 4, 4, 4, 5, 2, 0, 2, 0, 0, 1, 3),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 0, 0, 4, 2, 1, 1, 0, 1, 0, 3, 2, 0, 0, 3, 1, 1, 1, 2, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 1, 0, 0, 0, 2, 0, 0, 0, 1, 4, 0, 4, 2, 1, 0, 0, 0, 0, 0, 1),
+    (0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 2, 0, 2, 1, 0, 0, 1, 2, 1, 0, 1, 1, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 0, 0, 0, 0, 0, 1, 0, 0, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 2),
+    (0, 4, 0, 4, 0, 4, 0, 3, 0, 4, 4, 3, 4, 2, 4, 3, 2, 0, 4, 4, 4, 3, 5, 3, 5, 3, 3, 2, 4, 2, 4, 3, 4, 3, 1, 4, 0, 2, 3, 4, 4, 4, 3, 3, 3, 4, 4, 4, 3, 4, 1, 3, 4, 3, 2, 1, 2, 1, 3, 3, 3, 4, 4, 3, 3, 5, 0, 4, 0, 3, 0, 4, 3, 3, 3, 2, 1, 0, 3, 0, 0, 3, 3),
+    (0, 4, 0, 3, 0, 3, 0, 3, 0, 3, 5, 5, 3, 3, 3, 3, 4, 3, 4, 3, 3, 3, 4, 4, 4, 3, 3, 3, 3, 4, 3, 5, 3, 3, 1, 3, 2, 4, 5, 5, 5, 5, 4, 3, 4, 5, 5, 3, 2, 2, 3, 3, 3, 3, 2, 3, 3, 1, 2, 3, 2, 4, 3, 3, 3, 4, 0, 4, 0, 2, 0, 4, 3, 2, 2, 1, 2, 0, 3, 0, 0, 4, 1),
+)
+# fmt: on
+
+
+class JapaneseContextAnalysis:
+    NUM_OF_CATEGORY = 6
+    DONT_KNOW = -1
+    ENOUGH_REL_THRESHOLD = 100
+    MAX_REL_THRESHOLD = 1000
+    MINIMUM_DATA_THRESHOLD = 4
+
+    def __init__(self):
+        self._total_rel = None
+        self._rel_sample = None
+        self._need_to_skip_char_num = None
+        self._last_char_order = None
+        self._done = None
+        self.reset()
+
+    def reset(self):
+        self._total_rel = 0  # total sequence received
+        # category counters, each integer counts sequence in its category
+        self._rel_sample = [0] * self.NUM_OF_CATEGORY
+        # if last byte in current buffer is not the last byte of a character,
+        # we need to know how many bytes to skip in next buffer
+        self._need_to_skip_char_num = 0
+        self._last_char_order = -1  # The order of previous char
+        # If this flag is set to True, detection is done and conclusion has
+        # been made
+        self._done = False
+
+    def feed(self, byte_str, num_bytes):
+        if self._done:
+            return
+
+        # The buffer we got is byte oriented, and a character may span in more than one
+        # buffers. In case the last one or two byte in last buffer is not
+        # complete, we record how many byte needed to complete that character
+        # and skip these bytes here.  We can choose to record those bytes as
+        # well and analyse the character once it is complete, but since a
+        # character will not make much difference, by simply skipping
+        # this character will simply our logic and improve performance.
+        i = self._need_to_skip_char_num
+        while i < num_bytes:
+            order, char_len = self.get_order(byte_str[i : i + 2])
+            i += char_len
+            if i > num_bytes:
+                self._need_to_skip_char_num = i - num_bytes
+                self._last_char_order = -1
+            else:
+                if (order != -1) and (self._last_char_order != -1):
+                    self._total_rel += 1
+                    if self._total_rel > self.MAX_REL_THRESHOLD:
+                        self._done = True
+                        break
+                    self._rel_sample[
+                        jp2_char_context[self._last_char_order][order]
+                    ] += 1
+                self._last_char_order = order
+
+    def got_enough_data(self):
+        return self._total_rel > self.ENOUGH_REL_THRESHOLD
+
+    def get_confidence(self):
+        # This is just one way to calculate confidence. It works well for me.
+        if self._total_rel > self.MINIMUM_DATA_THRESHOLD:
+            return (self._total_rel - self._rel_sample[0]) / self._total_rel
+        return self.DONT_KNOW
+
+    def get_order(self, _):
+        return -1, 1
+
+
+class SJISContextAnalysis(JapaneseContextAnalysis):
+    def __init__(self):
+        super().__init__()
+        self._charset_name = "SHIFT_JIS"
+
+    @property
+    def charset_name(self):
+        return self._charset_name
+
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (0x81 <= first_char <= 0x9F) or (0xE0 <= first_char <= 0xFC):
+            char_len = 2
+            if (first_char == 0x87) or (0xFA <= first_char <= 0xFC):
+                self._charset_name = "CP932"
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 202) and (0x9F <= second_char <= 0xF1):
+                return second_char - 0x9F, char_len
+
+        return -1, char_len
+
+
+class EUCJPContextAnalysis(JapaneseContextAnalysis):
+    def get_order(self, byte_str):
+        if not byte_str:
+            return -1, 1
+        # find out current char's byte length
+        first_char = byte_str[0]
+        if (first_char == 0x8E) or (0xA1 <= first_char <= 0xFE):
+            char_len = 2
+        elif first_char == 0x8F:
+            char_len = 3
+        else:
+            char_len = 1
+
+        # return its order if it is hiragana
+        if len(byte_str) > 1:
+            second_char = byte_str[1]
+            if (first_char == 0xA4) and (0xA1 <= second_char <= 0xF3):
+                return second_char - 0xA1, char_len
+
+        return -1, char_len
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langbulgarianmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
new file mode 100644
index 0000000..9946682
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langbulgarianmodel.py
@@ -0,0 +1,4649 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+BULGARIAN_LANG_MODEL = {
+    63: {  # 'e'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 1,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 0,  # 'и'
+        26: 1,  # 'й'
+        12: 1,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 1,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 0,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    45: {  # '\xad'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 0,  # 'Л'
+        38: 1,  # 'М'
+        36: 0,  # 'Н'
+        41: 1,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 0,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 0,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    31: {  # 'А'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 2,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 2,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 2,  # 'З'
+        40: 1,  # 'И'
+        59: 1,  # 'Й'
+        33: 1,  # 'К'
+        46: 2,  # 'Л'
+        38: 1,  # 'М'
+        36: 2,  # 'Н'
+        41: 1,  # 'О'
+        30: 2,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 2,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 2,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 1,  # 'а'
+        18: 2,  # 'б'
+        9: 2,  # 'в'
+        20: 2,  # 'г'
+        11: 2,  # 'д'
+        3: 1,  # 'е'
+        23: 1,  # 'ж'
+        15: 2,  # 'з'
+        2: 0,  # 'и'
+        26: 2,  # 'й'
+        12: 2,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 0,  # 'о'
+        13: 2,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 1,  # 'у'
+        29: 2,  # 'ф'
+        25: 1,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    32: {  # 'Б'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 2,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 1,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 2,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 2,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 2,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 2,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 2,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 1,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    35: {  # 'В'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 2,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 2,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 2,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 2,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    43: {  # 'Г'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 0,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 1,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    37: {  # 'Д'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 2,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 2,  # 'Е'
+        55: 2,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 2,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 2,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 2,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    44: {  # 'Е'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 2,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 1,  # 'Й'
+        33: 2,  # 'К'
+        46: 2,  # 'Л'
+        38: 1,  # 'М'
+        36: 2,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 2,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 2,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 0,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 2,  # 'д'
+        3: 0,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 0,  # 'и'
+        26: 1,  # 'й'
+        12: 2,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 2,  # 'н'
+        4: 0,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 1,  # 'т'
+        19: 1,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    55: {  # 'Ж'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    47: {  # 'З'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 2,  # 'Н'
+        41: 1,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 2,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 1,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 1,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    40: {  # 'И'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 2,  # 'З'
+        40: 1,  # 'И'
+        59: 1,  # 'Й'
+        33: 2,  # 'К'
+        46: 2,  # 'Л'
+        38: 2,  # 'М'
+        36: 2,  # 'Н'
+        41: 1,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 0,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 2,  # 'Я'
+        1: 1,  # 'а'
+        18: 1,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 1,  # 'д'
+        3: 1,  # 'е'
+        23: 0,  # 'ж'
+        15: 3,  # 'з'
+        2: 0,  # 'и'
+        26: 1,  # 'й'
+        12: 1,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 2,  # 'н'
+        4: 0,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 0,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    59: {  # 'Й'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 1,  # 'С'
+        34: 1,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 1,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    33: {  # 'К'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 2,  # 'Н'
+        41: 2,  # 'О'
+        30: 2,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 1,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 2,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 3,  # 'р'
+        8: 1,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    46: {  # 'Л'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 2,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 0,  # 'Р'
+        28: 1,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    38: {  # 'М'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 2,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 2,  # 'л'
+        14: 0,  # 'м'
+        6: 2,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    36: {  # 'Н'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 2,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 2,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 1,  # 'Й'
+        33: 2,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 1,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 1,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 2,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    41: {  # 'О'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 2,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 1,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 1,  # 'Й'
+        33: 2,  # 'К'
+        46: 2,  # 'Л'
+        38: 2,  # 'М'
+        36: 2,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 1,  # 'а'
+        18: 2,  # 'б'
+        9: 2,  # 'в'
+        20: 2,  # 'г'
+        11: 1,  # 'д'
+        3: 1,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 0,  # 'и'
+        26: 1,  # 'й'
+        12: 2,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 0,  # 'о'
+        13: 2,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 3,  # 'т'
+        19: 1,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 1,  # 'ц'
+        21: 2,  # 'ч'
+        27: 0,  # 'ш'
+        24: 2,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    30: {  # 'П'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 2,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 2,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 3,  # 'л'
+        14: 0,  # 'м'
+        6: 1,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 3,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 2,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    39: {  # 'Р'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 2,  # 'Г'
+        37: 2,  # 'Д'
+        44: 2,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 0,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 2,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 1,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 1,  # 'с'
+        5: 0,  # 'т'
+        19: 3,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    28: {  # 'С'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 3,  # 'А'
+        32: 2,  # 'Б'
+        35: 2,  # 'В'
+        43: 1,  # 'Г'
+        37: 2,  # 'Д'
+        44: 2,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 2,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 2,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 2,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 1,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 2,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 1,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 3,  # 'т'
+        19: 2,  # 'у'
+        29: 2,  # 'ф'
+        25: 1,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    34: {  # 'Т'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 2,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 2,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 2,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 1,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 1,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 1,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 3,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    51: {  # 'У'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 2,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 0,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 2,  # 'Т'
+        51: 0,  # 'У'
+        48: 1,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 1,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 2,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 2,  # 'и'
+        26: 1,  # 'й'
+        12: 2,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 2,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 2,  # 'с'
+        5: 1,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    48: {  # 'Ф'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 2,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 1,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 2,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    49: {  # 'Х'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 1,  # 'П'
+        39: 1,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    53: {  # 'Ц'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 2,  # 'И'
+        59: 0,  # 'Й'
+        33: 2,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 1,  # 'Р'
+        28: 2,  # 'С'
+        34: 0,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 2,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 1,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    50: {  # 'Ч'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 2,  # 'А'
+        32: 1,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 1,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 2,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    54: {  # 'Ш'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 1,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 1,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 2,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 2,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    57: {  # 'Щ'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 1,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 1,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 1,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 1,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    61: {  # 'Ъ'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 1,  # 'Д'
+        44: 0,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 1,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 2,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 0,  # 'О'
+        30: 1,  # 'П'
+        39: 2,  # 'Р'
+        28: 1,  # 'С'
+        34: 1,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 1,  # 'Х'
+        53: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        54: 1,  # 'Ш'
+        57: 1,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 0,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 1,  # 'л'
+        14: 0,  # 'м'
+        6: 1,  # 'н'
+        4: 0,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    60: {  # 'Ю'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 1,  # 'Б'
+        35: 0,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 0,  # 'Е'
+        55: 1,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 0,  # 'М'
+        36: 1,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 1,  # 'Р'
+        28: 1,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 2,  # 'г'
+        11: 1,  # 'д'
+        3: 0,  # 'е'
+        23: 2,  # 'ж'
+        15: 1,  # 'з'
+        2: 1,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 0,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    56: {  # 'Я'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 1,  # 'Б'
+        35: 1,  # 'В'
+        43: 1,  # 'Г'
+        37: 1,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 1,  # 'Л'
+        38: 1,  # 'М'
+        36: 1,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 1,  # 'С'
+        34: 2,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 0,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 1,  # 'и'
+        26: 1,  # 'й'
+        12: 1,  # 'к'
+        10: 1,  # 'л'
+        14: 2,  # 'м'
+        6: 2,  # 'н'
+        4: 0,  # 'о'
+        13: 2,  # 'п'
+        7: 1,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    1: {  # 'а'
+        63: 1,  # 'e'
+        45: 1,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 1,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 1,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 3,  # 'и'
+        26: 3,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 3,  # 'ф'
+        25: 3,  # 'х'
+        22: 3,  # 'ц'
+        21: 3,  # 'ч'
+        27: 3,  # 'ш'
+        24: 3,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    18: {  # 'б'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 3,  # 'в'
+        20: 1,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 0,  # 'т'
+        19: 3,  # 'у'
+        29: 0,  # 'ф'
+        25: 2,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 3,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    9: {  # 'в'
+        63: 1,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 1,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 0,  # 'в'
+        20: 2,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 3,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 2,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 3,  # 'ч'
+        27: 2,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    20: {  # 'г'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 3,  # 'л'
+        14: 1,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 3,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    11: {  # 'д'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 2,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 1,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    3: {  # 'е'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 2,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 2,  # 'и'
+        26: 3,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 2,  # 'у'
+        29: 3,  # 'ф'
+        25: 3,  # 'х'
+        22: 3,  # 'ц'
+        21: 3,  # 'ч'
+        27: 3,  # 'ш'
+        24: 3,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    23: {  # 'ж'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 2,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    15: {  # 'з'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 2,  # 'ш'
+        24: 1,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    2: {  # 'и'
+        63: 1,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 1,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 1,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 1,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 1,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 3,  # 'и'
+        26: 3,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 2,  # 'у'
+        29: 3,  # 'ф'
+        25: 3,  # 'х'
+        22: 3,  # 'ц'
+        21: 3,  # 'ч'
+        27: 3,  # 'ш'
+        24: 3,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    26: {  # 'й'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 1,  # 'а'
+        18: 2,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 2,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 2,  # 'з'
+        2: 1,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 1,  # 'у'
+        29: 2,  # 'ф'
+        25: 1,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    12: {  # 'к'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 1,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 1,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 3,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    10: {  # 'л'
+        63: 1,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 1,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 1,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 2,  # 'п'
+        7: 2,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 2,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 2,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 2,  # 'ь'
+        42: 3,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    14: {  # 'м'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 1,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 2,  # 'к'
+        10: 3,  # 'л'
+        14: 1,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 1,  # 'т'
+        19: 3,  # 'у'
+        29: 2,  # 'ф'
+        25: 1,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 2,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    6: {  # 'н'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 1,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 2,  # 'б'
+        9: 2,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 2,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 3,  # 'ф'
+        25: 2,  # 'х'
+        22: 3,  # 'ц'
+        21: 3,  # 'ч'
+        27: 2,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 2,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    4: {  # 'о'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 2,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 3,  # 'и'
+        26: 3,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 2,  # 'у'
+        29: 3,  # 'ф'
+        25: 3,  # 'х'
+        22: 3,  # 'ц'
+        21: 3,  # 'ч'
+        27: 3,  # 'ш'
+        24: 3,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    13: {  # 'п'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 1,  # 'й'
+        12: 2,  # 'к'
+        10: 3,  # 'л'
+        14: 1,  # 'м'
+        6: 2,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 3,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    7: {  # 'р'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 3,  # 'е'
+        23: 3,  # 'ж'
+        15: 2,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 2,  # 'п'
+        7: 1,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 2,  # 'ф'
+        25: 3,  # 'х'
+        22: 3,  # 'ц'
+        21: 2,  # 'ч'
+        27: 3,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    8: {  # 'с'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 2,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 1,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 2,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 2,  # 'ш'
+        24: 0,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 2,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    5: {  # 'т'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 2,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 2,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 3,  # 'у'
+        29: 1,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 2,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 3,  # 'ъ'
+        52: 2,  # 'ь'
+        42: 2,  # 'ю'
+        16: 3,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    19: {  # 'у'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 2,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 2,  # 'и'
+        26: 2,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 1,  # 'у'
+        29: 2,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 3,  # 'ч'
+        27: 3,  # 'ш'
+        24: 2,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    29: {  # 'ф'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 1,  # 'в'
+        20: 1,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 2,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 2,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 2,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    25: {  # 'х'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 3,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 2,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 1,  # 'п'
+        7: 3,  # 'р'
+        8: 1,  # 'с'
+        5: 2,  # 'т'
+        19: 3,  # 'у'
+        29: 0,  # 'ф'
+        25: 1,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    22: {  # 'ц'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 2,  # 'в'
+        20: 1,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 1,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 2,  # 'к'
+        10: 1,  # 'л'
+        14: 1,  # 'м'
+        6: 1,  # 'н'
+        4: 2,  # 'о'
+        13: 1,  # 'п'
+        7: 1,  # 'р'
+        8: 1,  # 'с'
+        5: 1,  # 'т'
+        19: 2,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 1,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 0,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    21: {  # 'ч'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 1,  # 'б'
+        9: 3,  # 'в'
+        20: 1,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 1,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 2,  # 'р'
+        8: 0,  # 'с'
+        5: 2,  # 'т'
+        19: 3,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 1,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    27: {  # 'ш'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 2,  # 'в'
+        20: 0,  # 'г'
+        11: 1,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 3,  # 'к'
+        10: 2,  # 'л'
+        14: 1,  # 'м'
+        6: 3,  # 'н'
+        4: 2,  # 'о'
+        13: 2,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 1,  # 'т'
+        19: 2,  # 'у'
+        29: 1,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 1,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 2,  # 'ъ'
+        52: 1,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    24: {  # 'щ'
+        63: 1,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 3,  # 'а'
+        18: 0,  # 'б'
+        9: 1,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 3,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 3,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 2,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 1,  # 'р'
+        8: 0,  # 'с'
+        5: 2,  # 'т'
+        19: 3,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 1,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 2,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    17: {  # 'ъ'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 1,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 3,  # 'г'
+        11: 3,  # 'д'
+        3: 2,  # 'е'
+        23: 3,  # 'ж'
+        15: 3,  # 'з'
+        2: 1,  # 'и'
+        26: 2,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 3,  # 'о'
+        13: 3,  # 'п'
+        7: 3,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 1,  # 'у'
+        29: 1,  # 'ф'
+        25: 2,  # 'х'
+        22: 2,  # 'ц'
+        21: 3,  # 'ч'
+        27: 2,  # 'ш'
+        24: 3,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 2,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    52: {  # 'ь'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 1,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 1,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 1,  # 'н'
+        4: 3,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 1,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 1,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 1,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    42: {  # 'ю'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 1,  # 'а'
+        18: 2,  # 'б'
+        9: 1,  # 'в'
+        20: 2,  # 'г'
+        11: 2,  # 'д'
+        3: 1,  # 'е'
+        23: 2,  # 'ж'
+        15: 2,  # 'з'
+        2: 1,  # 'и'
+        26: 1,  # 'й'
+        12: 2,  # 'к'
+        10: 2,  # 'л'
+        14: 2,  # 'м'
+        6: 2,  # 'н'
+        4: 1,  # 'о'
+        13: 1,  # 'п'
+        7: 2,  # 'р'
+        8: 2,  # 'с'
+        5: 2,  # 'т'
+        19: 1,  # 'у'
+        29: 1,  # 'ф'
+        25: 1,  # 'х'
+        22: 2,  # 'ц'
+        21: 3,  # 'ч'
+        27: 1,  # 'ш'
+        24: 1,  # 'щ'
+        17: 1,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    16: {  # 'я'
+        63: 0,  # 'e'
+        45: 1,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 3,  # 'б'
+        9: 3,  # 'в'
+        20: 2,  # 'г'
+        11: 3,  # 'д'
+        3: 2,  # 'е'
+        23: 1,  # 'ж'
+        15: 2,  # 'з'
+        2: 1,  # 'и'
+        26: 2,  # 'й'
+        12: 3,  # 'к'
+        10: 3,  # 'л'
+        14: 3,  # 'м'
+        6: 3,  # 'н'
+        4: 1,  # 'о'
+        13: 2,  # 'п'
+        7: 2,  # 'р'
+        8: 3,  # 'с'
+        5: 3,  # 'т'
+        19: 1,  # 'у'
+        29: 1,  # 'ф'
+        25: 3,  # 'х'
+        22: 2,  # 'ц'
+        21: 1,  # 'ч'
+        27: 1,  # 'ш'
+        24: 2,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 1,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    58: {  # 'є'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 0,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 0,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+    62: {  # '№'
+        63: 0,  # 'e'
+        45: 0,  # '\xad'
+        31: 0,  # 'А'
+        32: 0,  # 'Б'
+        35: 0,  # 'В'
+        43: 0,  # 'Г'
+        37: 0,  # 'Д'
+        44: 0,  # 'Е'
+        55: 0,  # 'Ж'
+        47: 0,  # 'З'
+        40: 0,  # 'И'
+        59: 0,  # 'Й'
+        33: 0,  # 'К'
+        46: 0,  # 'Л'
+        38: 0,  # 'М'
+        36: 0,  # 'Н'
+        41: 0,  # 'О'
+        30: 0,  # 'П'
+        39: 0,  # 'Р'
+        28: 0,  # 'С'
+        34: 0,  # 'Т'
+        51: 0,  # 'У'
+        48: 0,  # 'Ф'
+        49: 0,  # 'Х'
+        53: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        54: 0,  # 'Ш'
+        57: 0,  # 'Щ'
+        61: 0,  # 'Ъ'
+        60: 0,  # 'Ю'
+        56: 0,  # 'Я'
+        1: 0,  # 'а'
+        18: 0,  # 'б'
+        9: 0,  # 'в'
+        20: 0,  # 'г'
+        11: 0,  # 'д'
+        3: 0,  # 'е'
+        23: 0,  # 'ж'
+        15: 0,  # 'з'
+        2: 0,  # 'и'
+        26: 0,  # 'й'
+        12: 0,  # 'к'
+        10: 0,  # 'л'
+        14: 0,  # 'м'
+        6: 0,  # 'н'
+        4: 0,  # 'о'
+        13: 0,  # 'п'
+        7: 0,  # 'р'
+        8: 0,  # 'с'
+        5: 0,  # 'т'
+        19: 0,  # 'у'
+        29: 0,  # 'ф'
+        25: 0,  # 'х'
+        22: 0,  # 'ц'
+        21: 0,  # 'ч'
+        27: 0,  # 'ш'
+        24: 0,  # 'щ'
+        17: 0,  # 'ъ'
+        52: 0,  # 'ь'
+        42: 0,  # 'ю'
+        16: 0,  # 'я'
+        58: 0,  # 'є'
+        62: 0,  # '№'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+ISO_8859_5_BULGARIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 77,  # 'A'
+    66: 90,  # 'B'
+    67: 99,  # 'C'
+    68: 100,  # 'D'
+    69: 72,  # 'E'
+    70: 109,  # 'F'
+    71: 107,  # 'G'
+    72: 101,  # 'H'
+    73: 79,  # 'I'
+    74: 185,  # 'J'
+    75: 81,  # 'K'
+    76: 102,  # 'L'
+    77: 76,  # 'M'
+    78: 94,  # 'N'
+    79: 82,  # 'O'
+    80: 110,  # 'P'
+    81: 186,  # 'Q'
+    82: 108,  # 'R'
+    83: 91,  # 'S'
+    84: 74,  # 'T'
+    85: 119,  # 'U'
+    86: 84,  # 'V'
+    87: 96,  # 'W'
+    88: 111,  # 'X'
+    89: 187,  # 'Y'
+    90: 115,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 65,  # 'a'
+    98: 69,  # 'b'
+    99: 70,  # 'c'
+    100: 66,  # 'd'
+    101: 63,  # 'e'
+    102: 68,  # 'f'
+    103: 112,  # 'g'
+    104: 103,  # 'h'
+    105: 92,  # 'i'
+    106: 194,  # 'j'
+    107: 104,  # 'k'
+    108: 95,  # 'l'
+    109: 86,  # 'm'
+    110: 87,  # 'n'
+    111: 71,  # 'o'
+    112: 116,  # 'p'
+    113: 195,  # 'q'
+    114: 85,  # 'r'
+    115: 93,  # 's'
+    116: 97,  # 't'
+    117: 113,  # 'u'
+    118: 196,  # 'v'
+    119: 197,  # 'w'
+    120: 198,  # 'x'
+    121: 199,  # 'y'
+    122: 200,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 194,  # '\x80'
+    129: 195,  # '\x81'
+    130: 196,  # '\x82'
+    131: 197,  # '\x83'
+    132: 198,  # '\x84'
+    133: 199,  # '\x85'
+    134: 200,  # '\x86'
+    135: 201,  # '\x87'
+    136: 202,  # '\x88'
+    137: 203,  # '\x89'
+    138: 204,  # '\x8a'
+    139: 205,  # '\x8b'
+    140: 206,  # '\x8c'
+    141: 207,  # '\x8d'
+    142: 208,  # '\x8e'
+    143: 209,  # '\x8f'
+    144: 210,  # '\x90'
+    145: 211,  # '\x91'
+    146: 212,  # '\x92'
+    147: 213,  # '\x93'
+    148: 214,  # '\x94'
+    149: 215,  # '\x95'
+    150: 216,  # '\x96'
+    151: 217,  # '\x97'
+    152: 218,  # '\x98'
+    153: 219,  # '\x99'
+    154: 220,  # '\x9a'
+    155: 221,  # '\x9b'
+    156: 222,  # '\x9c'
+    157: 223,  # '\x9d'
+    158: 224,  # '\x9e'
+    159: 225,  # '\x9f'
+    160: 81,  # '\xa0'
+    161: 226,  # 'Ё'
+    162: 227,  # 'Ђ'
+    163: 228,  # 'Ѓ'
+    164: 229,  # 'Є'
+    165: 230,  # 'Ѕ'
+    166: 105,  # 'І'
+    167: 231,  # 'Ї'
+    168: 232,  # 'Ј'
+    169: 233,  # 'Љ'
+    170: 234,  # 'Њ'
+    171: 235,  # 'Ћ'
+    172: 236,  # 'Ќ'
+    173: 45,  # '\xad'
+    174: 237,  # 'Ў'
+    175: 238,  # 'Џ'
+    176: 31,  # 'А'
+    177: 32,  # 'Б'
+    178: 35,  # 'В'
+    179: 43,  # 'Г'
+    180: 37,  # 'Д'
+    181: 44,  # 'Е'
+    182: 55,  # 'Ж'
+    183: 47,  # 'З'
+    184: 40,  # 'И'
+    185: 59,  # 'Й'
+    186: 33,  # 'К'
+    187: 46,  # 'Л'
+    188: 38,  # 'М'
+    189: 36,  # 'Н'
+    190: 41,  # 'О'
+    191: 30,  # 'П'
+    192: 39,  # 'Р'
+    193: 28,  # 'С'
+    194: 34,  # 'Т'
+    195: 51,  # 'У'
+    196: 48,  # 'Ф'
+    197: 49,  # 'Х'
+    198: 53,  # 'Ц'
+    199: 50,  # 'Ч'
+    200: 54,  # 'Ш'
+    201: 57,  # 'Щ'
+    202: 61,  # 'Ъ'
+    203: 239,  # 'Ы'
+    204: 67,  # 'Ь'
+    205: 240,  # 'Э'
+    206: 60,  # 'Ю'
+    207: 56,  # 'Я'
+    208: 1,  # 'а'
+    209: 18,  # 'б'
+    210: 9,  # 'в'
+    211: 20,  # 'г'
+    212: 11,  # 'д'
+    213: 3,  # 'е'
+    214: 23,  # 'ж'
+    215: 15,  # 'з'
+    216: 2,  # 'и'
+    217: 26,  # 'й'
+    218: 12,  # 'к'
+    219: 10,  # 'л'
+    220: 14,  # 'м'
+    221: 6,  # 'н'
+    222: 4,  # 'о'
+    223: 13,  # 'п'
+    224: 7,  # 'р'
+    225: 8,  # 'с'
+    226: 5,  # 'т'
+    227: 19,  # 'у'
+    228: 29,  # 'ф'
+    229: 25,  # 'х'
+    230: 22,  # 'ц'
+    231: 21,  # 'ч'
+    232: 27,  # 'ш'
+    233: 24,  # 'щ'
+    234: 17,  # 'ъ'
+    235: 75,  # 'ы'
+    236: 52,  # 'ь'
+    237: 241,  # 'э'
+    238: 42,  # 'ю'
+    239: 16,  # 'я'
+    240: 62,  # '№'
+    241: 242,  # 'ё'
+    242: 243,  # 'ђ'
+    243: 244,  # 'ѓ'
+    244: 58,  # 'є'
+    245: 245,  # 'ѕ'
+    246: 98,  # 'і'
+    247: 246,  # 'ї'
+    248: 247,  # 'ј'
+    249: 248,  # 'љ'
+    250: 249,  # 'њ'
+    251: 250,  # 'ћ'
+    252: 251,  # 'ќ'
+    253: 91,  # '§'
+    254: 252,  # 'ў'
+    255: 253,  # 'џ'
+}
+
+ISO_8859_5_BULGARIAN_MODEL = SingleByteCharSetModel(
+    charset_name="ISO-8859-5",
+    language="Bulgarian",
+    char_to_order_map=ISO_8859_5_BULGARIAN_CHAR_TO_ORDER,
+    language_model=BULGARIAN_LANG_MODEL,
+    typical_positive_ratio=0.969392,
+    keep_ascii_letters=False,
+    alphabet="АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя",
+)
+
+WINDOWS_1251_BULGARIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 77,  # 'A'
+    66: 90,  # 'B'
+    67: 99,  # 'C'
+    68: 100,  # 'D'
+    69: 72,  # 'E'
+    70: 109,  # 'F'
+    71: 107,  # 'G'
+    72: 101,  # 'H'
+    73: 79,  # 'I'
+    74: 185,  # 'J'
+    75: 81,  # 'K'
+    76: 102,  # 'L'
+    77: 76,  # 'M'
+    78: 94,  # 'N'
+    79: 82,  # 'O'
+    80: 110,  # 'P'
+    81: 186,  # 'Q'
+    82: 108,  # 'R'
+    83: 91,  # 'S'
+    84: 74,  # 'T'
+    85: 119,  # 'U'
+    86: 84,  # 'V'
+    87: 96,  # 'W'
+    88: 111,  # 'X'
+    89: 187,  # 'Y'
+    90: 115,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 65,  # 'a'
+    98: 69,  # 'b'
+    99: 70,  # 'c'
+    100: 66,  # 'd'
+    101: 63,  # 'e'
+    102: 68,  # 'f'
+    103: 112,  # 'g'
+    104: 103,  # 'h'
+    105: 92,  # 'i'
+    106: 194,  # 'j'
+    107: 104,  # 'k'
+    108: 95,  # 'l'
+    109: 86,  # 'm'
+    110: 87,  # 'n'
+    111: 71,  # 'o'
+    112: 116,  # 'p'
+    113: 195,  # 'q'
+    114: 85,  # 'r'
+    115: 93,  # 's'
+    116: 97,  # 't'
+    117: 113,  # 'u'
+    118: 196,  # 'v'
+    119: 197,  # 'w'
+    120: 198,  # 'x'
+    121: 199,  # 'y'
+    122: 200,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 206,  # 'Ђ'
+    129: 207,  # 'Ѓ'
+    130: 208,  # '‚'
+    131: 209,  # 'ѓ'
+    132: 210,  # '„'
+    133: 211,  # '…'
+    134: 212,  # '†'
+    135: 213,  # '‡'
+    136: 120,  # '€'
+    137: 214,  # '‰'
+    138: 215,  # 'Љ'
+    139: 216,  # '‹'
+    140: 217,  # 'Њ'
+    141: 218,  # 'Ќ'
+    142: 219,  # 'Ћ'
+    143: 220,  # 'Џ'
+    144: 221,  # 'ђ'
+    145: 78,  # '‘'
+    146: 64,  # '’'
+    147: 83,  # '“'
+    148: 121,  # '”'
+    149: 98,  # '•'
+    150: 117,  # '–'
+    151: 105,  # '—'
+    152: 222,  # None
+    153: 223,  # '™'
+    154: 224,  # 'љ'
+    155: 225,  # '›'
+    156: 226,  # 'њ'
+    157: 227,  # 'ќ'
+    158: 228,  # 'ћ'
+    159: 229,  # 'џ'
+    160: 88,  # '\xa0'
+    161: 230,  # 'Ў'
+    162: 231,  # 'ў'
+    163: 232,  # 'Ј'
+    164: 233,  # '¤'
+    165: 122,  # 'Ґ'
+    166: 89,  # '¦'
+    167: 106,  # '§'
+    168: 234,  # 'Ё'
+    169: 235,  # '©'
+    170: 236,  # 'Є'
+    171: 237,  # '«'
+    172: 238,  # '¬'
+    173: 45,  # '\xad'
+    174: 239,  # '®'
+    175: 240,  # 'Ї'
+    176: 73,  # '°'
+    177: 80,  # '±'
+    178: 118,  # 'І'
+    179: 114,  # 'і'
+    180: 241,  # 'ґ'
+    181: 242,  # 'µ'
+    182: 243,  # '¶'
+    183: 244,  # '·'
+    184: 245,  # 'ё'
+    185: 62,  # '№'
+    186: 58,  # 'є'
+    187: 246,  # '»'
+    188: 247,  # 'ј'
+    189: 248,  # 'Ѕ'
+    190: 249,  # 'ѕ'
+    191: 250,  # 'ї'
+    192: 31,  # 'А'
+    193: 32,  # 'Б'
+    194: 35,  # 'В'
+    195: 43,  # 'Г'
+    196: 37,  # 'Д'
+    197: 44,  # 'Е'
+    198: 55,  # 'Ж'
+    199: 47,  # 'З'
+    200: 40,  # 'И'
+    201: 59,  # 'Й'
+    202: 33,  # 'К'
+    203: 46,  # 'Л'
+    204: 38,  # 'М'
+    205: 36,  # 'Н'
+    206: 41,  # 'О'
+    207: 30,  # 'П'
+    208: 39,  # 'Р'
+    209: 28,  # 'С'
+    210: 34,  # 'Т'
+    211: 51,  # 'У'
+    212: 48,  # 'Ф'
+    213: 49,  # 'Х'
+    214: 53,  # 'Ц'
+    215: 50,  # 'Ч'
+    216: 54,  # 'Ш'
+    217: 57,  # 'Щ'
+    218: 61,  # 'Ъ'
+    219: 251,  # 'Ы'
+    220: 67,  # 'Ь'
+    221: 252,  # 'Э'
+    222: 60,  # 'Ю'
+    223: 56,  # 'Я'
+    224: 1,  # 'а'
+    225: 18,  # 'б'
+    226: 9,  # 'в'
+    227: 20,  # 'г'
+    228: 11,  # 'д'
+    229: 3,  # 'е'
+    230: 23,  # 'ж'
+    231: 15,  # 'з'
+    232: 2,  # 'и'
+    233: 26,  # 'й'
+    234: 12,  # 'к'
+    235: 10,  # 'л'
+    236: 14,  # 'м'
+    237: 6,  # 'н'
+    238: 4,  # 'о'
+    239: 13,  # 'п'
+    240: 7,  # 'р'
+    241: 8,  # 'с'
+    242: 5,  # 'т'
+    243: 19,  # 'у'
+    244: 29,  # 'ф'
+    245: 25,  # 'х'
+    246: 22,  # 'ц'
+    247: 21,  # 'ч'
+    248: 27,  # 'ш'
+    249: 24,  # 'щ'
+    250: 17,  # 'ъ'
+    251: 75,  # 'ы'
+    252: 52,  # 'ь'
+    253: 253,  # 'э'
+    254: 42,  # 'ю'
+    255: 16,  # 'я'
+}
+
+WINDOWS_1251_BULGARIAN_MODEL = SingleByteCharSetModel(
+    charset_name="windows-1251",
+    language="Bulgarian",
+    char_to_order_map=WINDOWS_1251_BULGARIAN_CHAR_TO_ORDER,
+    language_model=BULGARIAN_LANG_MODEL,
+    typical_positive_ratio=0.969392,
+    keep_ascii_letters=False,
+    alphabet="АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langgreekmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langgreekmodel.py
new file mode 100644
index 0000000..cfb8639
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langgreekmodel.py
@@ -0,0 +1,4397 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+GREEK_LANG_MODEL = {
+    60: {  # 'e'
+        60: 2,  # 'e'
+        55: 1,  # 'o'
+        58: 2,  # 't'
+        36: 1,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    55: {  # 'o'
+        60: 0,  # 'e'
+        55: 2,  # 'o'
+        58: 2,  # 't'
+        36: 1,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 1,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 1,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    58: {  # 't'
+        60: 2,  # 'e'
+        55: 1,  # 'o'
+        58: 1,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 1,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    36: {  # '·'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    61: {  # 'Ά'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 1,  # 'γ'
+        21: 2,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 1,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    46: {  # 'Έ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 2,  # 'β'
+        20: 2,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 2,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 2,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 1,  # 'σ'
+        2: 2,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    54: {  # 'Ό'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 2,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 2,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 2,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    31: {  # 'Α'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 2,  # 'Β'
+        43: 2,  # 'Γ'
+        41: 1,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 2,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 1,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 2,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 2,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 1,  # 'θ'
+        5: 0,  # 'ι'
+        11: 2,  # 'κ'
+        16: 3,  # 'λ'
+        10: 2,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 2,  # 'ς'
+        7: 2,  # 'σ'
+        2: 0,  # 'τ'
+        12: 3,  # 'υ'
+        28: 2,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    51: {  # 'Β'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 1,  # 'Ε'
+        40: 1,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 1,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 1,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 2,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    43: {  # 'Γ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 1,  # 'Α'
+        51: 0,  # 'Β'
+        43: 2,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 1,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 1,  # 'Κ'
+        53: 1,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 1,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    41: {  # 'Δ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 2,  # 'ή'
+        15: 2,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 1,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    34: {  # 'Ε'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 2,  # 'Γ'
+        41: 2,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 1,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 2,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 3,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 1,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 1,  # 'θ'
+        5: 2,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 2,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 2,  # 'σ'
+        2: 2,  # 'τ'
+        12: 2,  # 'υ'
+        28: 2,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 1,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    40: {  # 'Η'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 1,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 2,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 1,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 1,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 1,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    52: {  # 'Θ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 1,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 1,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    47: {  # 'Ι'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 1,  # 'Β'
+        43: 1,  # 'Γ'
+        41: 2,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 2,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 2,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 1,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 2,  # 'σ'
+        2: 1,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 1,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    44: {  # 'Κ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 1,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 1,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 1,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 1,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 2,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    53: {  # 'Λ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 1,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 2,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    38: {  # 'Μ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 2,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 2,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 3,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 2,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    49: {  # 'Ν'
+        60: 2,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 1,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 1,  # 'ω'
+        19: 2,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    59: {  # 'Ξ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 1,  # 'Ε'
+        40: 1,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 1,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    39: {  # 'Ο'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 1,  # 'Β'
+        43: 2,  # 'Γ'
+        41: 2,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 1,  # 'Η'
+        52: 2,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 2,  # 'Φ'
+        50: 2,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 2,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 2,  # 'κ'
+        16: 2,  # 'λ'
+        10: 2,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 2,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 2,  # 'τ'
+        12: 2,  # 'υ'
+        28: 1,  # 'φ'
+        23: 1,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    35: {  # 'Π'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 2,  # 'Λ'
+        38: 1,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 1,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 1,  # 'έ'
+        22: 1,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 2,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    48: {  # 'Ρ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 1,  # 'Γ'
+        41: 1,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 1,  # 'Τ'
+        45: 1,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 1,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 2,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 1,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    37: {  # 'Σ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 1,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 2,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 2,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 2,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 2,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 2,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 2,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    33: {  # 'Τ'
+        60: 0,  # 'e'
+        55: 1,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 2,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 2,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 1,  # 'Τ'
+        45: 1,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 2,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 2,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 2,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 2,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    45: {  # 'Υ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 2,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 1,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 2,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 1,  # 'Λ'
+        38: 2,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 2,  # 'Π'
+        48: 1,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    56: {  # 'Φ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 1,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 1,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 2,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 2,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 1,  # 'ύ'
+        27: 1,  # 'ώ'
+    },
+    50: {  # 'Χ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 1,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 2,  # 'Ε'
+        40: 2,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 2,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 1,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 1,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 1,  # 'Χ'
+        57: 1,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 2,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 2,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    57: {  # 'Ω'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 1,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 1,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 2,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 2,  # 'Ρ'
+        37: 2,  # 'Σ'
+        33: 2,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 2,  # 'ρ'
+        14: 2,  # 'ς'
+        7: 2,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 1,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    17: {  # 'ά'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 3,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 2,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 3,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    18: {  # 'έ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 3,  # 'α'
+        29: 2,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 3,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 3,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    22: {  # 'ή'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 1,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 2,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    15: {  # 'ί'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 3,  # 'α'
+        29: 2,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 3,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 1,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    1: {  # 'α'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 2,  # 'έ'
+        22: 0,  # 'ή'
+        15: 3,  # 'ί'
+        1: 0,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 2,  # 'ε'
+        32: 3,  # 'ζ'
+        13: 1,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 2,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    29: {  # 'β'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 2,  # 'έ'
+        22: 3,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 2,  # 'γ'
+        21: 2,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 3,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 2,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    20: {  # 'γ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 3,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 3,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    21: {  # 'δ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    3: {  # 'ε'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 3,  # 'ί'
+        1: 2,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 2,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 2,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    32: {  # 'ζ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 2,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 1,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 2,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    13: {  # 'η'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 2,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    25: {  # 'θ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 1,  # 'λ'
+        10: 3,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    5: {  # 'ι'
+        60: 0,  # 'e'
+        55: 1,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 1,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 0,  # 'ί'
+        1: 3,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    11: {  # 'κ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 2,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 2,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 2,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    16: {  # 'λ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 1,  # 'β'
+        20: 2,  # 'γ'
+        21: 1,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 2,  # 'θ'
+        5: 3,  # 'ι'
+        11: 2,  # 'κ'
+        16: 3,  # 'λ'
+        10: 2,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 2,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    10: {  # 'μ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 1,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 3,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 2,  # 'υ'
+        28: 3,  # 'φ'
+        23: 0,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    6: {  # 'ν'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 1,  # 'λ'
+        10: 0,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    30: {  # 'ξ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 2,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 2,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 1,  # 'ώ'
+    },
+    4: {  # 'ο'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 2,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 2,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 1,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    9: {  # 'π'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 3,  # 'λ'
+        10: 0,  # 'μ'
+        6: 2,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 2,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    8: {  # 'ρ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 2,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 1,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 2,  # 'π'
+        8: 2,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 2,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    14: {  # 'ς'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 2,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 0,  # 'θ'
+        5: 0,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 0,  # 'τ'
+        12: 0,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    7: {  # 'σ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 3,  # 'β'
+        20: 0,  # 'γ'
+        21: 2,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 3,  # 'θ'
+        5: 3,  # 'ι'
+        11: 3,  # 'κ'
+        16: 2,  # 'λ'
+        10: 3,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 3,  # 'φ'
+        23: 3,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    2: {  # 'τ'
+        60: 0,  # 'e'
+        55: 2,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 3,  # 'ι'
+        11: 2,  # 'κ'
+        16: 2,  # 'λ'
+        10: 3,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 2,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    12: {  # 'υ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 3,  # 'ή'
+        15: 2,  # 'ί'
+        1: 3,  # 'α'
+        29: 2,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 2,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 2,  # 'η'
+        25: 3,  # 'θ'
+        5: 2,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 3,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 2,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    28: {  # 'φ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 3,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 2,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 0,  # 'μ'
+        6: 1,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 1,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 2,  # 'ύ'
+        27: 2,  # 'ώ'
+    },
+    23: {  # 'χ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 3,  # 'ά'
+        18: 2,  # 'έ'
+        22: 3,  # 'ή'
+        15: 3,  # 'ί'
+        1: 3,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 2,  # 'θ'
+        5: 3,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 2,  # 'μ'
+        6: 3,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 0,  # 'π'
+        8: 3,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 3,  # 'τ'
+        12: 3,  # 'υ'
+        28: 0,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 3,  # 'ω'
+        19: 3,  # 'ό'
+        26: 3,  # 'ύ'
+        27: 3,  # 'ώ'
+    },
+    42: {  # 'ψ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 2,  # 'ά'
+        18: 2,  # 'έ'
+        22: 1,  # 'ή'
+        15: 2,  # 'ί'
+        1: 2,  # 'α'
+        29: 0,  # 'β'
+        20: 0,  # 'γ'
+        21: 0,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 3,  # 'η'
+        25: 0,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 0,  # 'λ'
+        10: 0,  # 'μ'
+        6: 0,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 0,  # 'π'
+        8: 0,  # 'ρ'
+        14: 0,  # 'ς'
+        7: 0,  # 'σ'
+        2: 2,  # 'τ'
+        12: 1,  # 'υ'
+        28: 0,  # 'φ'
+        23: 0,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    24: {  # 'ω'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 1,  # 'ά'
+        18: 0,  # 'έ'
+        22: 2,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 2,  # 'β'
+        20: 3,  # 'γ'
+        21: 2,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 0,  # 'η'
+        25: 3,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 0,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 2,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    19: {  # 'ό'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 3,  # 'β'
+        20: 3,  # 'γ'
+        21: 3,  # 'δ'
+        3: 1,  # 'ε'
+        32: 2,  # 'ζ'
+        13: 2,  # 'η'
+        25: 2,  # 'θ'
+        5: 2,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 1,  # 'ξ'
+        4: 2,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 3,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    26: {  # 'ύ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 2,  # 'α'
+        29: 2,  # 'β'
+        20: 2,  # 'γ'
+        21: 1,  # 'δ'
+        3: 3,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 2,  # 'η'
+        25: 3,  # 'θ'
+        5: 0,  # 'ι'
+        11: 3,  # 'κ'
+        16: 3,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 2,  # 'ξ'
+        4: 3,  # 'ο'
+        9: 3,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 2,  # 'φ'
+        23: 2,  # 'χ'
+        42: 2,  # 'ψ'
+        24: 2,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+    27: {  # 'ώ'
+        60: 0,  # 'e'
+        55: 0,  # 'o'
+        58: 0,  # 't'
+        36: 0,  # '·'
+        61: 0,  # 'Ά'
+        46: 0,  # 'Έ'
+        54: 0,  # 'Ό'
+        31: 0,  # 'Α'
+        51: 0,  # 'Β'
+        43: 0,  # 'Γ'
+        41: 0,  # 'Δ'
+        34: 0,  # 'Ε'
+        40: 0,  # 'Η'
+        52: 0,  # 'Θ'
+        47: 0,  # 'Ι'
+        44: 0,  # 'Κ'
+        53: 0,  # 'Λ'
+        38: 0,  # 'Μ'
+        49: 0,  # 'Ν'
+        59: 0,  # 'Ξ'
+        39: 0,  # 'Ο'
+        35: 0,  # 'Π'
+        48: 0,  # 'Ρ'
+        37: 0,  # 'Σ'
+        33: 0,  # 'Τ'
+        45: 0,  # 'Υ'
+        56: 0,  # 'Φ'
+        50: 0,  # 'Χ'
+        57: 0,  # 'Ω'
+        17: 0,  # 'ά'
+        18: 0,  # 'έ'
+        22: 0,  # 'ή'
+        15: 0,  # 'ί'
+        1: 0,  # 'α'
+        29: 1,  # 'β'
+        20: 0,  # 'γ'
+        21: 3,  # 'δ'
+        3: 0,  # 'ε'
+        32: 0,  # 'ζ'
+        13: 1,  # 'η'
+        25: 2,  # 'θ'
+        5: 2,  # 'ι'
+        11: 0,  # 'κ'
+        16: 2,  # 'λ'
+        10: 3,  # 'μ'
+        6: 3,  # 'ν'
+        30: 1,  # 'ξ'
+        4: 0,  # 'ο'
+        9: 2,  # 'π'
+        8: 3,  # 'ρ'
+        14: 3,  # 'ς'
+        7: 3,  # 'σ'
+        2: 3,  # 'τ'
+        12: 0,  # 'υ'
+        28: 1,  # 'φ'
+        23: 1,  # 'χ'
+        42: 0,  # 'ψ'
+        24: 0,  # 'ω'
+        19: 0,  # 'ό'
+        26: 0,  # 'ύ'
+        27: 0,  # 'ώ'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+WINDOWS_1253_GREEK_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 82,  # 'A'
+    66: 100,  # 'B'
+    67: 104,  # 'C'
+    68: 94,  # 'D'
+    69: 98,  # 'E'
+    70: 101,  # 'F'
+    71: 116,  # 'G'
+    72: 102,  # 'H'
+    73: 111,  # 'I'
+    74: 187,  # 'J'
+    75: 117,  # 'K'
+    76: 92,  # 'L'
+    77: 88,  # 'M'
+    78: 113,  # 'N'
+    79: 85,  # 'O'
+    80: 79,  # 'P'
+    81: 118,  # 'Q'
+    82: 105,  # 'R'
+    83: 83,  # 'S'
+    84: 67,  # 'T'
+    85: 114,  # 'U'
+    86: 119,  # 'V'
+    87: 95,  # 'W'
+    88: 99,  # 'X'
+    89: 109,  # 'Y'
+    90: 188,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 72,  # 'a'
+    98: 70,  # 'b'
+    99: 80,  # 'c'
+    100: 81,  # 'd'
+    101: 60,  # 'e'
+    102: 96,  # 'f'
+    103: 93,  # 'g'
+    104: 89,  # 'h'
+    105: 68,  # 'i'
+    106: 120,  # 'j'
+    107: 97,  # 'k'
+    108: 77,  # 'l'
+    109: 86,  # 'm'
+    110: 69,  # 'n'
+    111: 55,  # 'o'
+    112: 78,  # 'p'
+    113: 115,  # 'q'
+    114: 65,  # 'r'
+    115: 66,  # 's'
+    116: 58,  # 't'
+    117: 76,  # 'u'
+    118: 106,  # 'v'
+    119: 103,  # 'w'
+    120: 87,  # 'x'
+    121: 107,  # 'y'
+    122: 112,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 255,  # '€'
+    129: 255,  # None
+    130: 255,  # '‚'
+    131: 255,  # 'ƒ'
+    132: 255,  # '„'
+    133: 255,  # '…'
+    134: 255,  # '†'
+    135: 255,  # '‡'
+    136: 255,  # None
+    137: 255,  # '‰'
+    138: 255,  # None
+    139: 255,  # '‹'
+    140: 255,  # None
+    141: 255,  # None
+    142: 255,  # None
+    143: 255,  # None
+    144: 255,  # None
+    145: 255,  # '‘'
+    146: 255,  # '’'
+    147: 255,  # '“'
+    148: 255,  # '”'
+    149: 255,  # '•'
+    150: 255,  # '–'
+    151: 255,  # '—'
+    152: 255,  # None
+    153: 255,  # '™'
+    154: 255,  # None
+    155: 255,  # '›'
+    156: 255,  # None
+    157: 255,  # None
+    158: 255,  # None
+    159: 255,  # None
+    160: 253,  # '\xa0'
+    161: 233,  # '΅'
+    162: 61,  # 'Ά'
+    163: 253,  # '£'
+    164: 253,  # '¤'
+    165: 253,  # '¥'
+    166: 253,  # '¦'
+    167: 253,  # '§'
+    168: 253,  # '¨'
+    169: 253,  # '©'
+    170: 253,  # None
+    171: 253,  # '«'
+    172: 253,  # '¬'
+    173: 74,  # '\xad'
+    174: 253,  # '®'
+    175: 253,  # '―'
+    176: 253,  # '°'
+    177: 253,  # '±'
+    178: 253,  # '²'
+    179: 253,  # '³'
+    180: 247,  # '΄'
+    181: 253,  # 'µ'
+    182: 253,  # '¶'
+    183: 36,  # '·'
+    184: 46,  # 'Έ'
+    185: 71,  # 'Ή'
+    186: 73,  # 'Ί'
+    187: 253,  # '»'
+    188: 54,  # 'Ό'
+    189: 253,  # '½'
+    190: 108,  # 'Ύ'
+    191: 123,  # 'Ώ'
+    192: 110,  # 'ΐ'
+    193: 31,  # 'Α'
+    194: 51,  # 'Β'
+    195: 43,  # 'Γ'
+    196: 41,  # 'Δ'
+    197: 34,  # 'Ε'
+    198: 91,  # 'Ζ'
+    199: 40,  # 'Η'
+    200: 52,  # 'Θ'
+    201: 47,  # 'Ι'
+    202: 44,  # 'Κ'
+    203: 53,  # 'Λ'
+    204: 38,  # 'Μ'
+    205: 49,  # 'Ν'
+    206: 59,  # 'Ξ'
+    207: 39,  # 'Ο'
+    208: 35,  # 'Π'
+    209: 48,  # 'Ρ'
+    210: 250,  # None
+    211: 37,  # 'Σ'
+    212: 33,  # 'Τ'
+    213: 45,  # 'Υ'
+    214: 56,  # 'Φ'
+    215: 50,  # 'Χ'
+    216: 84,  # 'Ψ'
+    217: 57,  # 'Ω'
+    218: 120,  # 'Ϊ'
+    219: 121,  # 'Ϋ'
+    220: 17,  # 'ά'
+    221: 18,  # 'έ'
+    222: 22,  # 'ή'
+    223: 15,  # 'ί'
+    224: 124,  # 'ΰ'
+    225: 1,  # 'α'
+    226: 29,  # 'β'
+    227: 20,  # 'γ'
+    228: 21,  # 'δ'
+    229: 3,  # 'ε'
+    230: 32,  # 'ζ'
+    231: 13,  # 'η'
+    232: 25,  # 'θ'
+    233: 5,  # 'ι'
+    234: 11,  # 'κ'
+    235: 16,  # 'λ'
+    236: 10,  # 'μ'
+    237: 6,  # 'ν'
+    238: 30,  # 'ξ'
+    239: 4,  # 'ο'
+    240: 9,  # 'π'
+    241: 8,  # 'ρ'
+    242: 14,  # 'ς'
+    243: 7,  # 'σ'
+    244: 2,  # 'τ'
+    245: 12,  # 'υ'
+    246: 28,  # 'φ'
+    247: 23,  # 'χ'
+    248: 42,  # 'ψ'
+    249: 24,  # 'ω'
+    250: 64,  # 'ϊ'
+    251: 75,  # 'ϋ'
+    252: 19,  # 'ό'
+    253: 26,  # 'ύ'
+    254: 27,  # 'ώ'
+    255: 253,  # None
+}
+
+WINDOWS_1253_GREEK_MODEL = SingleByteCharSetModel(
+    charset_name="windows-1253",
+    language="Greek",
+    char_to_order_map=WINDOWS_1253_GREEK_CHAR_TO_ORDER,
+    language_model=GREEK_LANG_MODEL,
+    typical_positive_ratio=0.982851,
+    keep_ascii_letters=False,
+    alphabet="ΆΈΉΊΌΎΏΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩάέήίαβγδεζηθικλμνξοπρςστυφχψωόύώ",
+)
+
+ISO_8859_7_GREEK_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 82,  # 'A'
+    66: 100,  # 'B'
+    67: 104,  # 'C'
+    68: 94,  # 'D'
+    69: 98,  # 'E'
+    70: 101,  # 'F'
+    71: 116,  # 'G'
+    72: 102,  # 'H'
+    73: 111,  # 'I'
+    74: 187,  # 'J'
+    75: 117,  # 'K'
+    76: 92,  # 'L'
+    77: 88,  # 'M'
+    78: 113,  # 'N'
+    79: 85,  # 'O'
+    80: 79,  # 'P'
+    81: 118,  # 'Q'
+    82: 105,  # 'R'
+    83: 83,  # 'S'
+    84: 67,  # 'T'
+    85: 114,  # 'U'
+    86: 119,  # 'V'
+    87: 95,  # 'W'
+    88: 99,  # 'X'
+    89: 109,  # 'Y'
+    90: 188,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 72,  # 'a'
+    98: 70,  # 'b'
+    99: 80,  # 'c'
+    100: 81,  # 'd'
+    101: 60,  # 'e'
+    102: 96,  # 'f'
+    103: 93,  # 'g'
+    104: 89,  # 'h'
+    105: 68,  # 'i'
+    106: 120,  # 'j'
+    107: 97,  # 'k'
+    108: 77,  # 'l'
+    109: 86,  # 'm'
+    110: 69,  # 'n'
+    111: 55,  # 'o'
+    112: 78,  # 'p'
+    113: 115,  # 'q'
+    114: 65,  # 'r'
+    115: 66,  # 's'
+    116: 58,  # 't'
+    117: 76,  # 'u'
+    118: 106,  # 'v'
+    119: 103,  # 'w'
+    120: 87,  # 'x'
+    121: 107,  # 'y'
+    122: 112,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 255,  # '\x80'
+    129: 255,  # '\x81'
+    130: 255,  # '\x82'
+    131: 255,  # '\x83'
+    132: 255,  # '\x84'
+    133: 255,  # '\x85'
+    134: 255,  # '\x86'
+    135: 255,  # '\x87'
+    136: 255,  # '\x88'
+    137: 255,  # '\x89'
+    138: 255,  # '\x8a'
+    139: 255,  # '\x8b'
+    140: 255,  # '\x8c'
+    141: 255,  # '\x8d'
+    142: 255,  # '\x8e'
+    143: 255,  # '\x8f'
+    144: 255,  # '\x90'
+    145: 255,  # '\x91'
+    146: 255,  # '\x92'
+    147: 255,  # '\x93'
+    148: 255,  # '\x94'
+    149: 255,  # '\x95'
+    150: 255,  # '\x96'
+    151: 255,  # '\x97'
+    152: 255,  # '\x98'
+    153: 255,  # '\x99'
+    154: 255,  # '\x9a'
+    155: 255,  # '\x9b'
+    156: 255,  # '\x9c'
+    157: 255,  # '\x9d'
+    158: 255,  # '\x9e'
+    159: 255,  # '\x9f'
+    160: 253,  # '\xa0'
+    161: 233,  # '‘'
+    162: 90,  # '’'
+    163: 253,  # '£'
+    164: 253,  # '€'
+    165: 253,  # '₯'
+    166: 253,  # '¦'
+    167: 253,  # '§'
+    168: 253,  # '¨'
+    169: 253,  # '©'
+    170: 253,  # 'ͺ'
+    171: 253,  # '«'
+    172: 253,  # '¬'
+    173: 74,  # '\xad'
+    174: 253,  # None
+    175: 253,  # '―'
+    176: 253,  # '°'
+    177: 253,  # '±'
+    178: 253,  # '²'
+    179: 253,  # '³'
+    180: 247,  # '΄'
+    181: 248,  # '΅'
+    182: 61,  # 'Ά'
+    183: 36,  # '·'
+    184: 46,  # 'Έ'
+    185: 71,  # 'Ή'
+    186: 73,  # 'Ί'
+    187: 253,  # '»'
+    188: 54,  # 'Ό'
+    189: 253,  # '½'
+    190: 108,  # 'Ύ'
+    191: 123,  # 'Ώ'
+    192: 110,  # 'ΐ'
+    193: 31,  # 'Α'
+    194: 51,  # 'Β'
+    195: 43,  # 'Γ'
+    196: 41,  # 'Δ'
+    197: 34,  # 'Ε'
+    198: 91,  # 'Ζ'
+    199: 40,  # 'Η'
+    200: 52,  # 'Θ'
+    201: 47,  # 'Ι'
+    202: 44,  # 'Κ'
+    203: 53,  # 'Λ'
+    204: 38,  # 'Μ'
+    205: 49,  # 'Ν'
+    206: 59,  # 'Ξ'
+    207: 39,  # 'Ο'
+    208: 35,  # 'Π'
+    209: 48,  # 'Ρ'
+    210: 250,  # None
+    211: 37,  # 'Σ'
+    212: 33,  # 'Τ'
+    213: 45,  # 'Υ'
+    214: 56,  # 'Φ'
+    215: 50,  # 'Χ'
+    216: 84,  # 'Ψ'
+    217: 57,  # 'Ω'
+    218: 120,  # 'Ϊ'
+    219: 121,  # 'Ϋ'
+    220: 17,  # 'ά'
+    221: 18,  # 'έ'
+    222: 22,  # 'ή'
+    223: 15,  # 'ί'
+    224: 124,  # 'ΰ'
+    225: 1,  # 'α'
+    226: 29,  # 'β'
+    227: 20,  # 'γ'
+    228: 21,  # 'δ'
+    229: 3,  # 'ε'
+    230: 32,  # 'ζ'
+    231: 13,  # 'η'
+    232: 25,  # 'θ'
+    233: 5,  # 'ι'
+    234: 11,  # 'κ'
+    235: 16,  # 'λ'
+    236: 10,  # 'μ'
+    237: 6,  # 'ν'
+    238: 30,  # 'ξ'
+    239: 4,  # 'ο'
+    240: 9,  # 'π'
+    241: 8,  # 'ρ'
+    242: 14,  # 'ς'
+    243: 7,  # 'σ'
+    244: 2,  # 'τ'
+    245: 12,  # 'υ'
+    246: 28,  # 'φ'
+    247: 23,  # 'χ'
+    248: 42,  # 'ψ'
+    249: 24,  # 'ω'
+    250: 64,  # 'ϊ'
+    251: 75,  # 'ϋ'
+    252: 19,  # 'ό'
+    253: 26,  # 'ύ'
+    254: 27,  # 'ώ'
+    255: 253,  # None
+}
+
+ISO_8859_7_GREEK_MODEL = SingleByteCharSetModel(
+    charset_name="ISO-8859-7",
+    language="Greek",
+    char_to_order_map=ISO_8859_7_GREEK_CHAR_TO_ORDER,
+    language_model=GREEK_LANG_MODEL,
+    typical_positive_ratio=0.982851,
+    keep_ascii_letters=False,
+    alphabet="ΆΈΉΊΌΎΏΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩάέήίαβγδεζηθικλμνξοπρςστυφχψωόύώ",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhebrewmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhebrewmodel.py
new file mode 100644
index 0000000..56d2975
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhebrewmodel.py
@@ -0,0 +1,4380 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+HEBREW_LANG_MODEL = {
+    50: {  # 'a'
+        50: 0,  # 'a'
+        60: 1,  # 'c'
+        61: 1,  # 'd'
+        42: 1,  # 'e'
+        53: 1,  # 'i'
+        56: 2,  # 'l'
+        54: 2,  # 'n'
+        49: 0,  # 'o'
+        51: 2,  # 'r'
+        43: 1,  # 's'
+        44: 2,  # 't'
+        63: 1,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 0,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 0,  # 'ו'
+        24: 0,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 0,  # 'כ'
+        4: 0,  # 'ל'
+        11: 0,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 0,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 1,  # 'ק'
+        7: 0,  # 'ר'
+        10: 1,  # 'ש'
+        5: 0,  # 'ת'
+        32: 0,  # '–'
+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    60: {  # 'c'
+        50: 1,  # 'a'
+        60: 1,  # 'c'
+        61: 0,  # 'd'
+        42: 1,  # 'e'
+        53: 1,  # 'i'
+        56: 1,  # 'l'
+        54: 0,  # 'n'
+        49: 1,  # 'o'
+        51: 1,  # 'r'
+        43: 1,  # 's'
+        44: 2,  # 't'
+        63: 1,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 0,  # 'ו'
+        24: 0,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 0,  # 'כ'
+        4: 0,  # 'ל'
+        11: 0,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 1,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
+        7: 0,  # 'ר'
+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    61: {  # 'd'
+        50: 1,  # 'a'
+        60: 0,  # 'c'
+        61: 1,  # 'd'
+        42: 1,  # 'e'
+        53: 1,  # 'i'
+        56: 1,  # 'l'
+        54: 1,  # 'n'
+        49: 2,  # 'o'
+        51: 1,  # 'r'
+        43: 1,  # 's'
+        44: 0,  # 't'
+        63: 1,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 0,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 0,  # 'ו'
+        24: 0,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 0,  # 'כ'
+        4: 0,  # 'ל'
+        11: 0,  # 'ם'
+        6: 0,  # 'מ'
+        23: 0,  # 'ן'
+        12: 0,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
+        7: 0,  # 'ר'
+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
+        32: 1,  # '–'
+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    42: {  # 'e'
+        50: 1,  # 'a'
+        60: 1,  # 'c'
+        61: 2,  # 'd'
+        42: 1,  # 'e'
+        53: 1,  # 'i'
+        56: 2,  # 'l'
+        54: 2,  # 'n'
+        49: 1,  # 'o'
+        51: 2,  # 'r'
+        43: 2,  # 's'
+        44: 2,  # 't'
+        63: 1,  # 'u'
+        34: 1,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 0,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
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+        2: 0,  # 'ו'
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+        1: 0,  # 'י'
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+        6: 0,  # 'מ'
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+        12: 0,  # 'נ'
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+        13: 0,  # 'ע'
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+        18: 1,  # 'פ'
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+        17: 0,  # 'ק'
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+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
+        32: 1,  # '–'
+        52: 2,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    53: {  # 'i'
+        50: 1,  # 'a'
+        60: 2,  # 'c'
+        61: 1,  # 'd'
+        42: 1,  # 'e'
+        53: 0,  # 'i'
+        56: 1,  # 'l'
+        54: 2,  # 'n'
+        49: 2,  # 'o'
+        51: 1,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 0,  # 'ִ'
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+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 0,  # 'א'
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+        20: 0,  # 'ג'
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+        3: 0,  # 'ה'
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+        14: 0,  # 'ח'
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+        1: 0,  # 'י'
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+        6: 0,  # 'מ'
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+        12: 0,  # 'נ'
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+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
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+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
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+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
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+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    56: {  # 'l'
+        50: 1,  # 'a'
+        60: 1,  # 'c'
+        61: 1,  # 'd'
+        42: 2,  # 'e'
+        53: 2,  # 'i'
+        56: 2,  # 'l'
+        54: 1,  # 'n'
+        49: 1,  # 'o'
+        51: 0,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        9: 0,  # 'א'
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+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
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+        50: 1,  # 'a'
+        60: 1,  # 'c'
+        61: 1,  # 'd'
+        42: 1,  # 'e'
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+        56: 1,  # 'l'
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+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
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+        38: 0,  # 'ׁ'
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+        9: 0,  # 'א'
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+        20: 0,  # 'ג'
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+        3: 1,  # 'ה'
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+        1: 0,  # 'י'
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+        52: 2,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
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+        50: 1,  # 'a'
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+        54: 2,  # 'n'
+        49: 1,  # 'o'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
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+        30: 0,  # 'ְ'
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+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    51: {  # 'r'
+        50: 2,  # 'a'
+        60: 1,  # 'c'
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+        51: 1,  # 'r'
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+        39: 0,  # '½'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
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+        9: 0,  # 'א'
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+        52: 2,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    43: {  # 's'
+        50: 1,  # 'a'
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+        42: 2,  # 'e'
+        53: 1,  # 'i'
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+        51: 1,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
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+        9: 0,  # 'א'
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+        1: 0,  # 'י'
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+        52: 1,  # '’'
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+        46: 2,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    44: {  # 't'
+        50: 1,  # 'a'
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+        56: 1,  # 'l'
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+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
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+        28: 0,  # 'ּ'
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+        52: 2,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    63: {  # 'u'
+        50: 1,  # 'a'
+        60: 1,  # 'c'
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+        48: 0,  # '¼'
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+        40: 0,  # '…'
+    },
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+        40: 0,  # '…'
+    },
+    55: {  # '´'
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+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
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+        28: 0,  # 'ּ'
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+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
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+        3: 1,  # 'ה'
+        2: 1,  # 'ו'
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+        1: 2,  # 'י'
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+        6: 1,  # 'מ'
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+        12: 1,  # 'נ'
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+        13: 0,  # 'ע'
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+        18: 0,  # 'פ'
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+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
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+        10: 1,  # 'ש'
+        5: 0,  # 'ת'
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+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    48: {  # '¼'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 0,  # 'ִ'
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+        36: 0,  # 'ֶ'
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+        29: 0,  # 'ָ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
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+        20: 0,  # 'ג'
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+        3: 0,  # 'ה'
+        2: 1,  # 'ו'
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+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
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+        6: 1,  # 'מ'
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+        12: 0,  # 'נ'
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+        13: 0,  # 'ע'
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+        18: 0,  # 'פ'
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+        52: 0,  # '’'
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+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    39: {  # '½'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
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+        21: 1,  # 'צ'
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+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    57: {  # '¾'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 0,  # 'ִ'
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+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
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+        50: 0,  # 'a'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 1,  # 'ֶ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 2,  # 'ב'
+        20: 2,  # 'ג'
+        16: 2,  # 'ד'
+        3: 2,  # 'ה'
+        2: 2,  # 'ו'
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+        14: 2,  # 'ח'
+        22: 2,  # 'ט'
+        1: 2,  # 'י'
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+        15: 2,  # 'כ'
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+        21: 2,  # 'צ'
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+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    59: {  # 'ֱ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
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+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 1,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
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+        29: 0,  # 'ָ'
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+        28: 0,  # 'ּ'
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+        9: 0,  # 'א'
+        8: 1,  # 'ב'
+        20: 1,  # 'ג'
+        16: 0,  # 'ד'
+        3: 0,  # 'ה'
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+        14: 0,  # 'ח'
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+        1: 1,  # 'י'
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+        6: 2,  # 'מ'
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+        12: 1,  # 'נ'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    41: {  # 'ֲ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
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+        29: 0,  # 'ָ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
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+        9: 0,  # 'א'
+        8: 2,  # 'ב'
+        20: 1,  # 'ג'
+        16: 2,  # 'ד'
+        3: 1,  # 'ה'
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+        14: 1,  # 'ח'
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+        1: 1,  # 'י'
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+        5: 1,  # 'ת'
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+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    33: {  # 'ִ'
+        50: 0,  # 'a'
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+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 1,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 1,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 1,  # 'ָ'
+        35: 0,  # 'ֹ'
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+        28: 1,  # 'ּ'
+        38: 0,  # 'ׁ'
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+        9: 1,  # 'א'
+        8: 2,  # 'ב'
+        20: 2,  # 'ג'
+        16: 2,  # 'ד'
+        3: 1,  # 'ה'
+        2: 1,  # 'ו'
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+        14: 1,  # 'ח'
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+        1: 3,  # 'י'
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+        18: 2,  # 'פ'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
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+        50: 0,  # 'a'
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+        57: 0,  # '¾'
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+        36: 1,  # 'ֶ'
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+        9: 2,  # 'א'
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+        1: 3,  # 'י'
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+        18: 1,  # 'פ'
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+        32: 0,  # '–'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    36: {  # 'ֶ'
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+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
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+        33: 0,  # 'ִ'
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+        36: 1,  # 'ֶ'
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+        28: 0,  # 'ּ'
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+        9: 2,  # 'א'
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+        16: 2,  # 'ד'
+        3: 2,  # 'ה'
+        2: 1,  # 'ו'
+        24: 1,  # 'ז'
+        14: 2,  # 'ח'
+        22: 1,  # 'ט'
+        1: 2,  # 'י'
+        25: 2,  # 'ך'
+        15: 1,  # 'כ'
+        4: 2,  # 'ל'
+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 2,  # 'ן'
+        12: 2,  # 'נ'
+        19: 2,  # 'ס'
+        13: 1,  # 'ע'
+        26: 1,  # 'ף'
+        18: 1,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 1,  # 'צ'
+        17: 1,  # 'ק'
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+        10: 2,  # 'ש'
+        5: 2,  # 'ת'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    31: {  # 'ַ'
+        50: 0,  # 'a'
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+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 1,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 2,  # 'ב'
+        20: 2,  # 'ג'
+        16: 2,  # 'ד'
+        3: 2,  # 'ה'
+        2: 1,  # 'ו'
+        24: 2,  # 'ז'
+        14: 2,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 2,  # 'כ'
+        4: 2,  # 'ל'
+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 2,  # 'ן'
+        12: 2,  # 'נ'
+        19: 2,  # 'ס'
+        13: 2,  # 'ע'
+        26: 2,  # 'ף'
+        18: 2,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 2,  # 'ק'
+        7: 2,  # 'ר'
+        10: 2,  # 'ש'
+        5: 2,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    29: {  # 'ָ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        56: 0,  # 'l'
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+        51: 0,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 1,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 1,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 2,  # 'ב'
+        20: 2,  # 'ג'
+        16: 2,  # 'ד'
+        3: 3,  # 'ה'
+        2: 2,  # 'ו'
+        24: 2,  # 'ז'
+        14: 2,  # 'ח'
+        22: 1,  # 'ט'
+        1: 2,  # 'י'
+        25: 2,  # 'ך'
+        15: 2,  # 'כ'
+        4: 2,  # 'ל'
+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 2,  # 'ן'
+        12: 2,  # 'נ'
+        19: 1,  # 'ס'
+        13: 2,  # 'ע'
+        26: 1,  # 'ף'
+        18: 2,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 2,  # 'ק'
+        7: 2,  # 'ר'
+        10: 2,  # 'ש'
+        5: 2,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    35: {  # 'ֹ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        54: 0,  # 'n'
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+        51: 0,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 2,  # 'ב'
+        20: 1,  # 'ג'
+        16: 2,  # 'ד'
+        3: 2,  # 'ה'
+        2: 1,  # 'ו'
+        24: 1,  # 'ז'
+        14: 1,  # 'ח'
+        22: 1,  # 'ט'
+        1: 1,  # 'י'
+        25: 1,  # 'ך'
+        15: 2,  # 'כ'
+        4: 2,  # 'ל'
+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 2,  # 'ן'
+        12: 2,  # 'נ'
+        19: 2,  # 'ס'
+        13: 2,  # 'ע'
+        26: 1,  # 'ף'
+        18: 2,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 2,  # 'ק'
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+        10: 2,  # 'ש'
+        5: 2,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    62: {  # 'ֻ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 0,  # 'ִ'
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+        28: 0,  # 'ּ'
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+        9: 0,  # 'א'
+        8: 1,  # 'ב'
+        20: 1,  # 'ג'
+        16: 1,  # 'ד'
+        3: 1,  # 'ה'
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+        14: 1,  # 'ח'
+        22: 0,  # 'ט'
+        1: 1,  # 'י'
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+        12: 1,  # 'נ'
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+        13: 1,  # 'ע'
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+        18: 1,  # 'פ'
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+        21: 1,  # 'צ'
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+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    28: {  # 'ּ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 3,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 1,  # 'ֲ'
+        33: 3,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 3,  # 'ַ'
+        29: 3,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 2,  # 'ׁ'
+        45: 1,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 2,  # 'ב'
+        20: 1,  # 'ג'
+        16: 2,  # 'ד'
+        3: 1,  # 'ה'
+        2: 2,  # 'ו'
+        24: 1,  # 'ז'
+        14: 1,  # 'ח'
+        22: 1,  # 'ט'
+        1: 2,  # 'י'
+        25: 2,  # 'ך'
+        15: 2,  # 'כ'
+        4: 2,  # 'ל'
+        11: 1,  # 'ם'
+        6: 2,  # 'מ'
+        23: 1,  # 'ן'
+        12: 2,  # 'נ'
+        19: 1,  # 'ס'
+        13: 2,  # 'ע'
+        26: 1,  # 'ף'
+        18: 1,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 1,  # 'צ'
+        17: 1,  # 'ק'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    38: {  # 'ׁ'
+        50: 0,  # 'a'
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+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
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+        9: 0,  # 'א'
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+        13: 1,  # 'ע'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    45: {  # 'ׂ'
+        50: 0,  # 'a'
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+        61: 0,  # 'd'
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+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
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+        33: 2,  # 'ִ'
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+        36: 2,  # 'ֶ'
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+        29: 2,  # 'ָ'
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+        28: 0,  # 'ּ'
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+        9: 1,  # 'א'
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+        20: 1,  # 'ג'
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+        3: 1,  # 'ה'
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+        18: 1,  # 'פ'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    9: {  # 'א'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
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+        28: 0,  # 'ּ'
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+        9: 2,  # 'א'
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+        1: 3,  # 'י'
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+        18: 3,  # 'פ'
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+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    8: {  # 'ב'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 1,  # 'd'
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+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
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+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 3,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
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+        6: 3,  # 'מ'
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+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
+        26: 1,  # 'ף'
+        18: 3,  # 'פ'
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+        5: 3,  # 'ת'
+        32: 1,  # '–'
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+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    20: {  # 'ג'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
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+        34: 1,  # '\xa0'
+        55: 2,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 1,  # 'ִ'
+        37: 1,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 3,  # 'ב'
+        20: 2,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 2,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 1,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
+        19: 2,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 2,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 1,  # 'צ'
+        17: 1,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    16: {  # 'ד'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 1,  # 'ז'
+        14: 2,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 2,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 2,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 3,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    3: {  # 'ה'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 1,  # 'd'
+        42: 0,  # 'e'
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+        34: 1,  # '\xa0'
+        55: 0,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 1,  # 'ְ'
+        59: 1,  # 'ֱ'
+        41: 2,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 3,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 3,  # 'כ'
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+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 1,  # '–'
+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    2: {  # 'ו'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        49: 0,  # 'o'
+        51: 0,  # 'r'
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+        44: 1,  # 't'
+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 1,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 3,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 3,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 3,  # 'ך'
+        15: 3,  # 'כ'
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+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
+        27: 3,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 1,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    24: {  # 'ז'
+        50: 0,  # 'a'
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+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 1,  # 'ֲ'
+        33: 1,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 2,  # 'ב'
+        20: 2,  # 'ג'
+        16: 2,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 2,  # 'ח'
+        22: 1,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 3,  # 'כ'
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+        11: 2,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 2,  # 'נ'
+        19: 1,  # 'ס'
+        13: 2,  # 'ע'
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+        18: 1,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 1,  # 'ש'
+        5: 2,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    14: {  # 'ח'
+        50: 0,  # 'a'
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+        61: 0,  # 'd'
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+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 1,  # 'ֱ'
+        41: 2,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 3,  # 'ב'
+        20: 2,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 2,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 2,  # 'כ'
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+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
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+        13: 1,  # 'ע'
+        26: 2,  # 'ף'
+        18: 2,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 1,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    22: {  # 'ט'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        34: 1,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 1,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 1,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 1,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 1,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 3,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 2,  # 'כ'
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+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 2,  # 'ס'
+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 2,  # 'ק'
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+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    1: {  # 'י'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
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+        56: 0,  # 'l'
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+        49: 0,  # 'o'
+        51: 0,  # 'r'
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+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
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+        14: 3,  # 'ח'
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+        1: 3,  # 'י'
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+        15: 3,  # 'כ'
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+        6: 3,  # 'מ'
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+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
+        27: 3,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
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+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 1,  # '–'
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+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    25: {  # 'ך'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
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+        49: 0,  # 'o'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 0,  # 'ִ'
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+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 1,  # 'ּ'
+        38: 0,  # 'ׁ'
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+        9: 1,  # 'א'
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+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 0,  # 'ו'
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+        14: 1,  # 'ח'
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+        1: 0,  # 'י'
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+        18: 0,  # 'פ'
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+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
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+        10: 1,  # 'ש'
+        5: 0,  # 'ת'
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+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    15: {  # 'כ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
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+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
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+        28: 3,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
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+        20: 2,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 3,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 3,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 2,  # 'ע'
+        26: 3,  # 'ף'
+        18: 3,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 2,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    4: {  # 'ל'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 3,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 3,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 3,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 1,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    11: {  # 'ם'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
+        8: 1,  # 'ב'
+        20: 1,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 1,  # 'ו'
+        24: 1,  # 'ז'
+        14: 1,  # 'ח'
+        22: 0,  # 'ט'
+        1: 1,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
+        4: 1,  # 'ל'
+        11: 1,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 1,  # 'נ'
+        19: 0,  # 'ס'
+        13: 1,  # 'ע'
+        26: 0,  # 'ף'
+        18: 1,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 1,  # 'צ'
+        17: 1,  # 'ק'
+        7: 1,  # 'ר'
+        10: 1,  # 'ש'
+        5: 1,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    6: {  # 'מ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 3,  # 'ע'
+        26: 0,  # 'ף'
+        18: 3,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    23: {  # 'ן'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 0,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
+        8: 1,  # 'ב'
+        20: 1,  # 'ג'
+        16: 1,  # 'ד'
+        3: 1,  # 'ה'
+        2: 1,  # 'ו'
+        24: 0,  # 'ז'
+        14: 1,  # 'ח'
+        22: 1,  # 'ט'
+        1: 1,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
+        4: 1,  # 'ל'
+        11: 1,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 1,  # 'נ'
+        19: 1,  # 'ס'
+        13: 1,  # 'ע'
+        26: 1,  # 'ף'
+        18: 1,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 1,  # 'ק'
+        7: 1,  # 'ר'
+        10: 1,  # 'ש'
+        5: 1,  # 'ת'
+        32: 1,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+    12: {  # 'נ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 3,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    19: {  # 'ס'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 1,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 1,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 2,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 1,  # 'ז'
+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 2,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 2,  # 'ס'
+        13: 3,  # 'ע'
+        26: 3,  # 'ף'
+        18: 3,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 1,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    13: {  # 'ע'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 1,  # 'ְ'
+        59: 1,  # 'ֱ'
+        41: 2,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 2,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 2,  # 'א'
+        8: 3,  # 'ב'
+        20: 3,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 3,  # 'ז'
+        14: 1,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 2,  # 'כ'
+        4: 3,  # 'ל'
+        11: 3,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 2,  # 'ע'
+        26: 1,  # 'ף'
+        18: 2,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    26: {  # 'ף'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 0,  # 'ה'
+        2: 1,  # 'ו'
+        24: 0,  # 'ז'
+        14: 1,  # 'ח'
+        22: 0,  # 'ט'
+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
+        4: 1,  # 'ל'
+        11: 0,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 0,  # 'נ'
+        19: 1,  # 'ס'
+        13: 0,  # 'ע'
+        26: 1,  # 'ף'
+        18: 1,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 1,  # 'ק'
+        7: 1,  # 'ר'
+        10: 1,  # 'ש'
+        5: 0,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    18: {  # 'פ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 1,  # 'ֵ'
+        36: 2,  # 'ֶ'
+        31: 1,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
+        8: 2,  # 'ב'
+        20: 3,  # 'ג'
+        16: 2,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 2,  # 'ז'
+        14: 3,  # 'ח'
+        22: 3,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 3,  # 'כ'
+        4: 3,  # 'ל'
+        11: 2,  # 'ם'
+        6: 2,  # 'מ'
+        23: 3,  # 'ן'
+        12: 3,  # 'נ'
+        19: 3,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 2,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 3,  # 'צ'
+        17: 3,  # 'ק'
+        7: 3,  # 'ר'
+        10: 3,  # 'ש'
+        5: 3,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    27: {  # 'ץ'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
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+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        29: 0,  # 'ָ'
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+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
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+        1: 0,  # 'י'
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+        6: 0,  # 'מ'
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+        12: 0,  # 'נ'
+        19: 1,  # 'ס'
+        13: 0,  # 'ע'
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+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
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+        10: 0,  # 'ש'
+        5: 1,  # 'ת'
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+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
+    21: {  # 'צ'
+        50: 0,  # 'a'
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+        34: 0,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 2,  # 'ִ'
+        37: 2,  # 'ֵ'
+        36: 1,  # 'ֶ'
+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
+        62: 1,  # 'ֻ'
+        28: 2,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 3,  # 'א'
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+        20: 2,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
+        2: 3,  # 'ו'
+        24: 1,  # 'ז'
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+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 1,  # 'כ'
+        4: 3,  # 'ל'
+        11: 2,  # 'ם'
+        6: 3,  # 'מ'
+        23: 2,  # 'ן'
+        12: 3,  # 'נ'
+        19: 1,  # 'ס'
+        13: 3,  # 'ע'
+        26: 2,  # 'ף'
+        18: 3,  # 'פ'
+        27: 2,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 3,  # 'ק'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    17: {  # 'ק'
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+        34: 1,  # '\xa0'
+        55: 1,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 2,  # 'ִ'
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+        36: 1,  # 'ֶ'
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+        38: 0,  # 'ׁ'
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+        9: 3,  # 'א'
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+        20: 2,  # 'ג'
+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
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+        14: 3,  # 'ח'
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+        1: 3,  # 'י'
+        25: 1,  # 'ך'
+        15: 1,  # 'כ'
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+        11: 2,  # 'ם'
+        6: 3,  # 'מ'
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+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
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+        21: 3,  # 'צ'
+        17: 2,  # 'ק'
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+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
+    },
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+        50: 0,  # 'a'
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+        34: 1,  # '\xa0'
+        55: 2,  # '´'
+        48: 1,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 1,  # 'ֲ'
+        33: 2,  # 'ִ'
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+        28: 0,  # 'ּ'
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+        9: 3,  # 'א'
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+        1: 3,  # 'י'
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+        18: 3,  # 'פ'
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+        46: 1,  # '”'
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+        40: 2,  # '…'
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+        39: 0,  # '½'
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+        30: 1,  # 'ְ'
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+        33: 1,  # 'ִ'
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+        28: 2,  # 'ּ'
+        38: 3,  # 'ׁ'
+        45: 2,  # 'ׂ'
+        9: 3,  # 'א'
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+        16: 3,  # 'ד'
+        3: 3,  # 'ה'
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+        14: 3,  # 'ח'
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+        1: 3,  # 'י'
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+        12: 3,  # 'נ'
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+        18: 3,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
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+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 1,  # '…'
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+        55: 0,  # '´'
+        48: 1,  # '¼'
+        39: 1,  # '½'
+        57: 0,  # '¾'
+        30: 2,  # 'ְ'
+        59: 0,  # 'ֱ'
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+        33: 2,  # 'ִ'
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+        31: 2,  # 'ַ'
+        29: 2,  # 'ָ'
+        35: 1,  # 'ֹ'
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+        28: 2,  # 'ּ'
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+        9: 3,  # 'א'
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+        3: 3,  # 'ה'
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+        14: 3,  # 'ח'
+        22: 2,  # 'ט'
+        1: 3,  # 'י'
+        25: 2,  # 'ך'
+        15: 3,  # 'כ'
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+        6: 3,  # 'מ'
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+        12: 3,  # 'נ'
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+        13: 3,  # 'ע'
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+        18: 3,  # 'פ'
+        27: 1,  # 'ץ'
+        21: 2,  # 'צ'
+        17: 3,  # 'ק'
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+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
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+        9: 1,  # 'א'
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+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    52: {  # '’'
+        50: 1,  # 'a'
+        60: 0,  # 'c'
+        61: 1,  # 'd'
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+        51: 1,  # 'r'
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+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
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+        30: 0,  # 'ְ'
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+        40: 0,  # '…'
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+        40: 0,  # '…'
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+        16: 0,  # 'ד'
+        3: 0,  # 'ה'
+        2: 0,  # 'ו'
+        24: 0,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 1,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
+        4: 1,  # 'ל'
+        11: 0,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 0,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 1,  # 'צ'
+        17: 0,  # 'ק'
+        7: 1,  # 'ר'
+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 0,  # '†'
+        40: 0,  # '…'
+    },
+    58: {  # '†'
+        50: 0,  # 'a'
+        60: 0,  # 'c'
+        61: 0,  # 'd'
+        42: 0,  # 'e'
+        53: 0,  # 'i'
+        56: 0,  # 'l'
+        54: 0,  # 'n'
+        49: 0,  # 'o'
+        51: 0,  # 'r'
+        43: 0,  # 's'
+        44: 0,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 0,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 0,  # 'ה'
+        2: 0,  # 'ו'
+        24: 0,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 0,  # 'י'
+        25: 0,  # 'ך'
+        15: 0,  # 'כ'
+        4: 0,  # 'ל'
+        11: 0,  # 'ם'
+        6: 0,  # 'מ'
+        23: 0,  # 'ן'
+        12: 0,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 0,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
+        7: 0,  # 'ר'
+        10: 0,  # 'ש'
+        5: 0,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 0,  # '”'
+        58: 2,  # '†'
+        40: 0,  # '…'
+    },
+    40: {  # '…'
+        50: 1,  # 'a'
+        60: 1,  # 'c'
+        61: 1,  # 'd'
+        42: 1,  # 'e'
+        53: 1,  # 'i'
+        56: 0,  # 'l'
+        54: 1,  # 'n'
+        49: 0,  # 'o'
+        51: 1,  # 'r'
+        43: 1,  # 's'
+        44: 1,  # 't'
+        63: 0,  # 'u'
+        34: 0,  # '\xa0'
+        55: 0,  # '´'
+        48: 0,  # '¼'
+        39: 0,  # '½'
+        57: 0,  # '¾'
+        30: 0,  # 'ְ'
+        59: 0,  # 'ֱ'
+        41: 0,  # 'ֲ'
+        33: 0,  # 'ִ'
+        37: 0,  # 'ֵ'
+        36: 0,  # 'ֶ'
+        31: 0,  # 'ַ'
+        29: 0,  # 'ָ'
+        35: 0,  # 'ֹ'
+        62: 0,  # 'ֻ'
+        28: 0,  # 'ּ'
+        38: 0,  # 'ׁ'
+        45: 0,  # 'ׂ'
+        9: 1,  # 'א'
+        8: 0,  # 'ב'
+        20: 0,  # 'ג'
+        16: 0,  # 'ד'
+        3: 1,  # 'ה'
+        2: 1,  # 'ו'
+        24: 1,  # 'ז'
+        14: 0,  # 'ח'
+        22: 0,  # 'ט'
+        1: 1,  # 'י'
+        25: 0,  # 'ך'
+        15: 1,  # 'כ'
+        4: 1,  # 'ל'
+        11: 0,  # 'ם'
+        6: 1,  # 'מ'
+        23: 0,  # 'ן'
+        12: 1,  # 'נ'
+        19: 0,  # 'ס'
+        13: 0,  # 'ע'
+        26: 0,  # 'ף'
+        18: 1,  # 'פ'
+        27: 0,  # 'ץ'
+        21: 0,  # 'צ'
+        17: 0,  # 'ק'
+        7: 1,  # 'ר'
+        10: 1,  # 'ש'
+        5: 1,  # 'ת'
+        32: 0,  # '–'
+        52: 0,  # '’'
+        47: 0,  # '“'
+        46: 1,  # '”'
+        58: 0,  # '†'
+        40: 2,  # '…'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+WINDOWS_1255_HEBREW_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 69,  # 'A'
+    66: 91,  # 'B'
+    67: 79,  # 'C'
+    68: 80,  # 'D'
+    69: 92,  # 'E'
+    70: 89,  # 'F'
+    71: 97,  # 'G'
+    72: 90,  # 'H'
+    73: 68,  # 'I'
+    74: 111,  # 'J'
+    75: 112,  # 'K'
+    76: 82,  # 'L'
+    77: 73,  # 'M'
+    78: 95,  # 'N'
+    79: 85,  # 'O'
+    80: 78,  # 'P'
+    81: 121,  # 'Q'
+    82: 86,  # 'R'
+    83: 71,  # 'S'
+    84: 67,  # 'T'
+    85: 102,  # 'U'
+    86: 107,  # 'V'
+    87: 84,  # 'W'
+    88: 114,  # 'X'
+    89: 103,  # 'Y'
+    90: 115,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 50,  # 'a'
+    98: 74,  # 'b'
+    99: 60,  # 'c'
+    100: 61,  # 'd'
+    101: 42,  # 'e'
+    102: 76,  # 'f'
+    103: 70,  # 'g'
+    104: 64,  # 'h'
+    105: 53,  # 'i'
+    106: 105,  # 'j'
+    107: 93,  # 'k'
+    108: 56,  # 'l'
+    109: 65,  # 'm'
+    110: 54,  # 'n'
+    111: 49,  # 'o'
+    112: 66,  # 'p'
+    113: 110,  # 'q'
+    114: 51,  # 'r'
+    115: 43,  # 's'
+    116: 44,  # 't'
+    117: 63,  # 'u'
+    118: 81,  # 'v'
+    119: 77,  # 'w'
+    120: 98,  # 'x'
+    121: 75,  # 'y'
+    122: 108,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 124,  # '€'
+    129: 202,  # None
+    130: 203,  # '‚'
+    131: 204,  # 'ƒ'
+    132: 205,  # '„'
+    133: 40,  # '…'
+    134: 58,  # '†'
+    135: 206,  # '‡'
+    136: 207,  # 'ˆ'
+    137: 208,  # '‰'
+    138: 209,  # None
+    139: 210,  # '‹'
+    140: 211,  # None
+    141: 212,  # None
+    142: 213,  # None
+    143: 214,  # None
+    144: 215,  # None
+    145: 83,  # '‘'
+    146: 52,  # '’'
+    147: 47,  # '“'
+    148: 46,  # '”'
+    149: 72,  # '•'
+    150: 32,  # '–'
+    151: 94,  # '—'
+    152: 216,  # '˜'
+    153: 113,  # '™'
+    154: 217,  # None
+    155: 109,  # '›'
+    156: 218,  # None
+    157: 219,  # None
+    158: 220,  # None
+    159: 221,  # None
+    160: 34,  # '\xa0'
+    161: 116,  # '¡'
+    162: 222,  # '¢'
+    163: 118,  # '£'
+    164: 100,  # '₪'
+    165: 223,  # '¥'
+    166: 224,  # '¦'
+    167: 117,  # '§'
+    168: 119,  # '¨'
+    169: 104,  # '©'
+    170: 125,  # '×'
+    171: 225,  # '«'
+    172: 226,  # '¬'
+    173: 87,  # '\xad'
+    174: 99,  # '®'
+    175: 227,  # '¯'
+    176: 106,  # '°'
+    177: 122,  # '±'
+    178: 123,  # '²'
+    179: 228,  # '³'
+    180: 55,  # '´'
+    181: 229,  # 'µ'
+    182: 230,  # '¶'
+    183: 101,  # '·'
+    184: 231,  # '¸'
+    185: 232,  # '¹'
+    186: 120,  # '÷'
+    187: 233,  # '»'
+    188: 48,  # '¼'
+    189: 39,  # '½'
+    190: 57,  # '¾'
+    191: 234,  # '¿'
+    192: 30,  # 'ְ'
+    193: 59,  # 'ֱ'
+    194: 41,  # 'ֲ'
+    195: 88,  # 'ֳ'
+    196: 33,  # 'ִ'
+    197: 37,  # 'ֵ'
+    198: 36,  # 'ֶ'
+    199: 31,  # 'ַ'
+    200: 29,  # 'ָ'
+    201: 35,  # 'ֹ'
+    202: 235,  # None
+    203: 62,  # 'ֻ'
+    204: 28,  # 'ּ'
+    205: 236,  # 'ֽ'
+    206: 126,  # '־'
+    207: 237,  # 'ֿ'
+    208: 238,  # '׀'
+    209: 38,  # 'ׁ'
+    210: 45,  # 'ׂ'
+    211: 239,  # '׃'
+    212: 240,  # 'װ'
+    213: 241,  # 'ױ'
+    214: 242,  # 'ײ'
+    215: 243,  # '׳'
+    216: 127,  # '״'
+    217: 244,  # None
+    218: 245,  # None
+    219: 246,  # None
+    220: 247,  # None
+    221: 248,  # None
+    222: 249,  # None
+    223: 250,  # None
+    224: 9,  # 'א'
+    225: 8,  # 'ב'
+    226: 20,  # 'ג'
+    227: 16,  # 'ד'
+    228: 3,  # 'ה'
+    229: 2,  # 'ו'
+    230: 24,  # 'ז'
+    231: 14,  # 'ח'
+    232: 22,  # 'ט'
+    233: 1,  # 'י'
+    234: 25,  # 'ך'
+    235: 15,  # 'כ'
+    236: 4,  # 'ל'
+    237: 11,  # 'ם'
+    238: 6,  # 'מ'
+    239: 23,  # 'ן'
+    240: 12,  # 'נ'
+    241: 19,  # 'ס'
+    242: 13,  # 'ע'
+    243: 26,  # 'ף'
+    244: 18,  # 'פ'
+    245: 27,  # 'ץ'
+    246: 21,  # 'צ'
+    247: 17,  # 'ק'
+    248: 7,  # 'ר'
+    249: 10,  # 'ש'
+    250: 5,  # 'ת'
+    251: 251,  # None
+    252: 252,  # None
+    253: 128,  # '\u200e'
+    254: 96,  # '\u200f'
+    255: 253,  # None
+}
+
+WINDOWS_1255_HEBREW_MODEL = SingleByteCharSetModel(
+    charset_name="windows-1255",
+    language="Hebrew",
+    char_to_order_map=WINDOWS_1255_HEBREW_CHAR_TO_ORDER,
+    language_model=HEBREW_LANG_MODEL,
+    typical_positive_ratio=0.984004,
+    keep_ascii_letters=False,
+    alphabet="אבגדהוזחטיךכלםמןנסעףפץצקרשתװױײ",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhungarianmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhungarianmodel.py
new file mode 100644
index 0000000..09a0d32
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langhungarianmodel.py
@@ -0,0 +1,4649 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+HUNGARIAN_LANG_MODEL = {
+    28: {  # 'A'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 2,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 2,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 2,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 2,  # 'N'
+        47: 1,  # 'O'
+        46: 2,  # 'P'
+        43: 2,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 2,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 2,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 2,  # 'n'
+        8: 0,  # 'o'
+        23: 2,  # 'p'
+        10: 2,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 1,  # 'u'
+        19: 1,  # 'v'
+        62: 1,  # 'x'
+        16: 0,  # 'y'
+        11: 3,  # 'z'
+        51: 1,  # 'Á'
+        44: 0,  # 'É'
+        61: 1,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    40: {  # 'B'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 0,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 1,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 3,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    54: {  # 'C'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 0,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 0,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 1,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 3,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 1,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    45: {  # 'D'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 0,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 0,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 1,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 1,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    32: {  # 'E'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 2,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 2,  # 'K'
+        41: 2,  # 'L'
+        34: 2,  # 'M'
+        35: 2,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 1,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 3,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 2,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 1,  # 't'
+        21: 2,  # 'u'
+        19: 1,  # 'v'
+        62: 1,  # 'x'
+        16: 0,  # 'y'
+        11: 3,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    50: {  # 'F'
+        28: 1,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 0,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 0,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 0,  # 'V'
+        55: 1,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 1,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 1,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    49: {  # 'G'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 2,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 2,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    38: {  # 'H'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 0,  # 'D'
+        32: 1,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 1,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 1,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 1,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 0,  # 'V'
+        55: 1,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 1,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 0,  # 'n'
+        8: 3,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 2,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 2,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    39: {  # 'I'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 2,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 2,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 2,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 0,  # 'e'
+        27: 1,  # 'f'
+        12: 2,  # 'g'
+        20: 1,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    53: {  # 'J'
+        28: 2,  # 'A'
+        40: 0,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 1,  # 'o'
+        23: 0,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 2,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 0,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    36: {  # 'K'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 0,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 1,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 3,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 2,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    41: {  # 'L'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 1,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    34: {  # 'M'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 0,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 3,  # 'a'
+        18: 0,  # 'b'
+        26: 1,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 3,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 3,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    35: {  # 'N'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 2,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 2,  # 'Y'
+        52: 1,  # 'Z'
+        2: 3,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 2,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 1,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    47: {  # 'O'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 2,  # 'K'
+        41: 2,  # 'L'
+        34: 2,  # 'M'
+        35: 2,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 2,  # 'k'
+        6: 2,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 1,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 1,  # 's'
+        3: 2,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 1,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    46: {  # 'P'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 0,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 1,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 1,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 3,  # 'á'
+        15: 2,  # 'é'
+        30: 0,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    43: {  # 'R'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 2,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 2,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    33: {  # 'S'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 3,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 1,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 1,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 1,  # 't'
+        21: 1,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    37: {  # 'T'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 1,  # 'S'
+        37: 2,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 2,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 1,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 0,  # 't'
+        21: 2,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 1,  # 'z'
+        51: 2,  # 'Á'
+        44: 2,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    57: {  # 'U'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 1,  # 'e'
+        27: 0,  # 'f'
+        12: 2,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 1,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    48: {  # 'V'
+        28: 2,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 0,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 2,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 2,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 2,  # 'o'
+        23: 0,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 2,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 0,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    55: {  # 'Y'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 1,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 2,  # 'Z'
+        2: 1,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 1,  # 'd'
+        1: 1,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 0,  # 'n'
+        8: 1,  # 'o'
+        23: 1,  # 'p'
+        10: 0,  # 'r'
+        5: 0,  # 's'
+        3: 0,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 1,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    52: {  # 'Z'
+        28: 2,  # 'A'
+        40: 1,  # 'B'
+        54: 0,  # 'C'
+        45: 1,  # 'D'
+        32: 2,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 2,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 2,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 2,  # 'S'
+        37: 1,  # 'T'
+        57: 1,  # 'U'
+        48: 1,  # 'V'
+        55: 1,  # 'Y'
+        52: 1,  # 'Z'
+        2: 1,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 1,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 1,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 2,  # 's'
+        3: 0,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 2,  # 'Á'
+        44: 1,  # 'É'
+        61: 1,  # 'Í'
+        58: 1,  # 'Ó'
+        59: 1,  # 'Ö'
+        60: 1,  # 'Ú'
+        63: 1,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    2: {  # 'a'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 2,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 2,  # 'o'
+        23: 3,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 1,  # 'x'
+        16: 2,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    18: {  # 'b'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 2,  # 'k'
+        6: 2,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 2,  # 's'
+        3: 1,  # 't'
+        21: 3,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 3,  # 'ó'
+        24: 2,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    26: {  # 'c'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 1,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 1,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 1,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 1,  # 'j'
+        7: 2,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 2,  # 't'
+        21: 2,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 2,  # 'á'
+        15: 2,  # 'é'
+        30: 2,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    17: {  # 'd'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 2,  # 'k'
+        6: 1,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 2,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    1: {  # 'e'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 2,  # 'e'
+        27: 3,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 2,  # 'o'
+        23: 3,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 2,  # 'u'
+        19: 3,  # 'v'
+        62: 2,  # 'x'
+        16: 2,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    27: {  # 'f'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 3,  # 'o'
+        23: 0,  # 'p'
+        10: 3,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 2,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 0,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 3,  # 'ö'
+        31: 1,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    12: {  # 'g'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 2,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 2,  # 'k'
+        6: 3,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 3,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 3,  # 'ó'
+        24: 2,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    20: {  # 'h'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 0,  # 'd'
+        1: 3,  # 'e'
+        27: 0,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 3,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 2,  # 's'
+        3: 1,  # 't'
+        21: 3,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 2,  # 'y'
+        11: 0,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 2,  # 'ó'
+        24: 2,  # 'ö'
+        31: 2,  # 'ú'
+        29: 1,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    9: {  # 'i'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 3,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 2,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 2,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 1,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 3,  # 'ó'
+        24: 1,  # 'ö'
+        31: 2,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    22: {  # 'j'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 1,  # 'i'
+        22: 2,  # 'j'
+        7: 2,  # 'k'
+        6: 2,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 1,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 3,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    7: {  # 'k'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 1,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 2,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 2,  # 'ó'
+        24: 3,  # 'ö'
+        31: 1,  # 'ú'
+        29: 3,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    6: {  # 'l'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 1,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 3,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 2,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 3,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 3,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    13: {  # 'm'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 1,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        8: 3,  # 'o'
+        23: 3,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 3,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 2,  # 'ó'
+        24: 2,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 2,  # 'ű'
+    },
+    4: {  # 'n'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 2,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 2,  # 'v'
+        62: 1,  # 'x'
+        16: 3,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 2,  # 'ó'
+        24: 3,  # 'ö'
+        31: 2,  # 'ú'
+        29: 3,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    8: {  # 'o'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 1,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 2,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 2,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 1,  # 'o'
+        23: 3,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 2,  # 'u'
+        19: 3,  # 'v'
+        62: 1,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    23: {  # 'p'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 1,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 2,  # 'k'
+        6: 3,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 3,  # 'o'
+        23: 3,  # 'p'
+        10: 3,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 3,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 2,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    10: {  # 'r'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 1,  # 'x'
+        16: 2,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 3,  # 'ú'
+        29: 3,  # 'ü'
+        42: 2,  # 'ő'
+        56: 2,  # 'ű'
+    },
+    5: {  # 's'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 2,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 2,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 1,  # 'j'
+        7: 3,  # 'k'
+        6: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 3,  # 'ú'
+        29: 3,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    3: {  # 't'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 1,  # 'g'
+        20: 3,  # 'h'
+        9: 3,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 3,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 3,  # 'ú'
+        29: 3,  # 'ü'
+        42: 3,  # 'ő'
+        56: 2,  # 'ű'
+    },
+    21: {  # 'u'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 2,  # 'b'
+        26: 2,  # 'c'
+        17: 3,  # 'd'
+        1: 2,  # 'e'
+        27: 1,  # 'f'
+        12: 3,  # 'g'
+        20: 2,  # 'h'
+        9: 2,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 1,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 1,  # 'u'
+        19: 3,  # 'v'
+        62: 1,  # 'x'
+        16: 1,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 2,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 0,  # 'ö'
+        31: 1,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    19: {  # 'v'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 3,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 1,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 2,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 2,  # 'ó'
+        24: 2,  # 'ö'
+        31: 1,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    62: {  # 'x'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 0,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 1,  # 'i'
+        22: 0,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 1,  # 'o'
+        23: 1,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 1,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 1,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    16: {  # 'y'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 3,  # 'e'
+        27: 2,  # 'f'
+        12: 2,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 2,  # 'j'
+        7: 2,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 2,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 2,  # 'í'
+        25: 2,  # 'ó'
+        24: 3,  # 'ö'
+        31: 2,  # 'ú'
+        29: 2,  # 'ü'
+        42: 1,  # 'ő'
+        56: 2,  # 'ű'
+    },
+    11: {  # 'z'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 3,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 3,  # 'd'
+        1: 3,  # 'e'
+        27: 1,  # 'f'
+        12: 2,  # 'g'
+        20: 2,  # 'h'
+        9: 3,  # 'i'
+        22: 1,  # 'j'
+        7: 3,  # 'k'
+        6: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 3,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 3,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 3,  # 'á'
+        15: 3,  # 'é'
+        30: 3,  # 'í'
+        25: 3,  # 'ó'
+        24: 3,  # 'ö'
+        31: 2,  # 'ú'
+        29: 3,  # 'ü'
+        42: 2,  # 'ő'
+        56: 1,  # 'ű'
+    },
+    51: {  # 'Á'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 1,  # 'F'
+        49: 2,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 2,  # 'N'
+        47: 0,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 2,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 1,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    44: {  # 'É'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 1,  # 'E'
+        50: 0,  # 'F'
+        49: 2,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 2,  # 'N'
+        47: 0,  # 'O'
+        46: 1,  # 'P'
+        43: 2,  # 'R'
+        33: 2,  # 'S'
+        37: 2,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 2,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 3,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 0,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    61: {  # 'Í'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 1,  # 'J'
+        36: 0,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 2,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 0,  # 'n'
+        8: 0,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 0,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    58: {  # 'Ó'
+        28: 1,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 1,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 2,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 2,  # 'h'
+        9: 0,  # 'i'
+        22: 0,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 0,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 1,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    59: {  # 'Ö'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 0,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 1,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 0,  # 'b'
+        26: 1,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 0,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 0,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 0,  # 'p'
+        10: 2,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    60: {  # 'Ú'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 1,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 1,  # 'F'
+        49: 1,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 0,  # 'b'
+        26: 0,  # 'c'
+        17: 0,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 2,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 2,  # 'j'
+        7: 0,  # 'k'
+        6: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 0,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 0,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    63: {  # 'Ü'
+        28: 0,  # 'A'
+        40: 1,  # 'B'
+        54: 0,  # 'C'
+        45: 1,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 1,  # 'G'
+        38: 1,  # 'H'
+        39: 0,  # 'I'
+        53: 1,  # 'J'
+        36: 1,  # 'K'
+        41: 1,  # 'L'
+        34: 1,  # 'M'
+        35: 1,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 1,  # 'R'
+        33: 1,  # 'S'
+        37: 1,  # 'T'
+        57: 0,  # 'U'
+        48: 1,  # 'V'
+        55: 0,  # 'Y'
+        52: 1,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 0,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 0,  # 'f'
+        12: 1,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 0,  # 'j'
+        7: 0,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        8: 0,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 1,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    14: {  # 'á'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 3,  # 'b'
+        26: 3,  # 'c'
+        17: 3,  # 'd'
+        1: 1,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 2,  # 'h'
+        9: 2,  # 'i'
+        22: 3,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 1,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 2,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 1,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 2,  # 'é'
+        30: 1,  # 'í'
+        25: 0,  # 'ó'
+        24: 1,  # 'ö'
+        31: 0,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    15: {  # 'é'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 3,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 3,  # 'g'
+        20: 3,  # 'h'
+        9: 2,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 1,  # 'o'
+        23: 3,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 0,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    30: {  # 'í'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 0,  # 'a'
+        18: 1,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 0,  # 'e'
+        27: 1,  # 'f'
+        12: 3,  # 'g'
+        20: 0,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 2,  # 's'
+        3: 3,  # 't'
+        21: 0,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    25: {  # 'ó'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 2,  # 'a'
+        18: 3,  # 'b'
+        26: 2,  # 'c'
+        17: 3,  # 'd'
+        1: 1,  # 'e'
+        27: 2,  # 'f'
+        12: 2,  # 'g'
+        20: 2,  # 'h'
+        9: 2,  # 'i'
+        22: 2,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        8: 1,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 1,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 0,  # 'ó'
+        24: 1,  # 'ö'
+        31: 1,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    24: {  # 'ö'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 0,  # 'a'
+        18: 3,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 0,  # 'e'
+        27: 1,  # 'f'
+        12: 2,  # 'g'
+        20: 1,  # 'h'
+        9: 0,  # 'i'
+        22: 1,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        8: 0,  # 'o'
+        23: 2,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 3,  # 't'
+        21: 0,  # 'u'
+        19: 3,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 3,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    31: {  # 'ú'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 1,  # 'b'
+        26: 2,  # 'c'
+        17: 1,  # 'd'
+        1: 1,  # 'e'
+        27: 2,  # 'f'
+        12: 3,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 3,  # 'j'
+        7: 1,  # 'k'
+        6: 3,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 3,  # 'r'
+        5: 3,  # 's'
+        3: 2,  # 't'
+        21: 1,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 1,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    29: {  # 'ü'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 1,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 3,  # 'g'
+        20: 2,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 3,  # 'k'
+        6: 3,  # 'l'
+        13: 1,  # 'm'
+        4: 3,  # 'n'
+        8: 0,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 0,  # 'u'
+        19: 2,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 1,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    42: {  # 'ő'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 2,  # 'b'
+        26: 1,  # 'c'
+        17: 2,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 2,  # 'k'
+        6: 3,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        8: 1,  # 'o'
+        23: 1,  # 'p'
+        10: 2,  # 'r'
+        5: 2,  # 's'
+        3: 2,  # 't'
+        21: 1,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 1,  # 'é'
+        30: 1,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 1,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+    56: {  # 'ű'
+        28: 0,  # 'A'
+        40: 0,  # 'B'
+        54: 0,  # 'C'
+        45: 0,  # 'D'
+        32: 0,  # 'E'
+        50: 0,  # 'F'
+        49: 0,  # 'G'
+        38: 0,  # 'H'
+        39: 0,  # 'I'
+        53: 0,  # 'J'
+        36: 0,  # 'K'
+        41: 0,  # 'L'
+        34: 0,  # 'M'
+        35: 0,  # 'N'
+        47: 0,  # 'O'
+        46: 0,  # 'P'
+        43: 0,  # 'R'
+        33: 0,  # 'S'
+        37: 0,  # 'T'
+        57: 0,  # 'U'
+        48: 0,  # 'V'
+        55: 0,  # 'Y'
+        52: 0,  # 'Z'
+        2: 1,  # 'a'
+        18: 1,  # 'b'
+        26: 0,  # 'c'
+        17: 1,  # 'd'
+        1: 1,  # 'e'
+        27: 1,  # 'f'
+        12: 1,  # 'g'
+        20: 1,  # 'h'
+        9: 1,  # 'i'
+        22: 1,  # 'j'
+        7: 1,  # 'k'
+        6: 1,  # 'l'
+        13: 0,  # 'm'
+        4: 2,  # 'n'
+        8: 0,  # 'o'
+        23: 0,  # 'p'
+        10: 1,  # 'r'
+        5: 1,  # 's'
+        3: 1,  # 't'
+        21: 0,  # 'u'
+        19: 1,  # 'v'
+        62: 0,  # 'x'
+        16: 0,  # 'y'
+        11: 2,  # 'z'
+        51: 0,  # 'Á'
+        44: 0,  # 'É'
+        61: 0,  # 'Í'
+        58: 0,  # 'Ó'
+        59: 0,  # 'Ö'
+        60: 0,  # 'Ú'
+        63: 0,  # 'Ü'
+        14: 0,  # 'á'
+        15: 0,  # 'é'
+        30: 0,  # 'í'
+        25: 0,  # 'ó'
+        24: 0,  # 'ö'
+        31: 0,  # 'ú'
+        29: 0,  # 'ü'
+        42: 0,  # 'ő'
+        56: 0,  # 'ű'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+WINDOWS_1250_HUNGARIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 28,  # 'A'
+    66: 40,  # 'B'
+    67: 54,  # 'C'
+    68: 45,  # 'D'
+    69: 32,  # 'E'
+    70: 50,  # 'F'
+    71: 49,  # 'G'
+    72: 38,  # 'H'
+    73: 39,  # 'I'
+    74: 53,  # 'J'
+    75: 36,  # 'K'
+    76: 41,  # 'L'
+    77: 34,  # 'M'
+    78: 35,  # 'N'
+    79: 47,  # 'O'
+    80: 46,  # 'P'
+    81: 72,  # 'Q'
+    82: 43,  # 'R'
+    83: 33,  # 'S'
+    84: 37,  # 'T'
+    85: 57,  # 'U'
+    86: 48,  # 'V'
+    87: 64,  # 'W'
+    88: 68,  # 'X'
+    89: 55,  # 'Y'
+    90: 52,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 2,  # 'a'
+    98: 18,  # 'b'
+    99: 26,  # 'c'
+    100: 17,  # 'd'
+    101: 1,  # 'e'
+    102: 27,  # 'f'
+    103: 12,  # 'g'
+    104: 20,  # 'h'
+    105: 9,  # 'i'
+    106: 22,  # 'j'
+    107: 7,  # 'k'
+    108: 6,  # 'l'
+    109: 13,  # 'm'
+    110: 4,  # 'n'
+    111: 8,  # 'o'
+    112: 23,  # 'p'
+    113: 67,  # 'q'
+    114: 10,  # 'r'
+    115: 5,  # 's'
+    116: 3,  # 't'
+    117: 21,  # 'u'
+    118: 19,  # 'v'
+    119: 65,  # 'w'
+    120: 62,  # 'x'
+    121: 16,  # 'y'
+    122: 11,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 161,  # '€'
+    129: 162,  # None
+    130: 163,  # '‚'
+    131: 164,  # None
+    132: 165,  # '„'
+    133: 166,  # '…'
+    134: 167,  # '†'
+    135: 168,  # '‡'
+    136: 169,  # None
+    137: 170,  # '‰'
+    138: 171,  # 'Š'
+    139: 172,  # '‹'
+    140: 173,  # 'Ś'
+    141: 174,  # 'Ť'
+    142: 175,  # 'Ž'
+    143: 176,  # 'Ź'
+    144: 177,  # None
+    145: 178,  # '‘'
+    146: 179,  # '’'
+    147: 180,  # '“'
+    148: 78,  # '”'
+    149: 181,  # '•'
+    150: 69,  # '–'
+    151: 182,  # '—'
+    152: 183,  # None
+    153: 184,  # '™'
+    154: 185,  # 'š'
+    155: 186,  # '›'
+    156: 187,  # 'ś'
+    157: 188,  # 'ť'
+    158: 189,  # 'ž'
+    159: 190,  # 'ź'
+    160: 191,  # '\xa0'
+    161: 192,  # 'ˇ'
+    162: 193,  # '˘'
+    163: 194,  # 'Ł'
+    164: 195,  # '¤'
+    165: 196,  # 'Ą'
+    166: 197,  # '¦'
+    167: 76,  # '§'
+    168: 198,  # '¨'
+    169: 199,  # '©'
+    170: 200,  # 'Ş'
+    171: 201,  # '«'
+    172: 202,  # '¬'
+    173: 203,  # '\xad'
+    174: 204,  # '®'
+    175: 205,  # 'Ż'
+    176: 81,  # '°'
+    177: 206,  # '±'
+    178: 207,  # '˛'
+    179: 208,  # 'ł'
+    180: 209,  # '´'
+    181: 210,  # 'µ'
+    182: 211,  # '¶'
+    183: 212,  # '·'
+    184: 213,  # '¸'
+    185: 214,  # 'ą'
+    186: 215,  # 'ş'
+    187: 216,  # '»'
+    188: 217,  # 'Ľ'
+    189: 218,  # '˝'
+    190: 219,  # 'ľ'
+    191: 220,  # 'ż'
+    192: 221,  # 'Ŕ'
+    193: 51,  # 'Á'
+    194: 83,  # 'Â'
+    195: 222,  # 'Ă'
+    196: 80,  # 'Ä'
+    197: 223,  # 'Ĺ'
+    198: 224,  # 'Ć'
+    199: 225,  # 'Ç'
+    200: 226,  # 'Č'
+    201: 44,  # 'É'
+    202: 227,  # 'Ę'
+    203: 228,  # 'Ë'
+    204: 229,  # 'Ě'
+    205: 61,  # 'Í'
+    206: 230,  # 'Î'
+    207: 231,  # 'Ď'
+    208: 232,  # 'Đ'
+    209: 233,  # 'Ń'
+    210: 234,  # 'Ň'
+    211: 58,  # 'Ó'
+    212: 235,  # 'Ô'
+    213: 66,  # 'Ő'
+    214: 59,  # 'Ö'
+    215: 236,  # '×'
+    216: 237,  # 'Ř'
+    217: 238,  # 'Ů'
+    218: 60,  # 'Ú'
+    219: 70,  # 'Ű'
+    220: 63,  # 'Ü'
+    221: 239,  # 'Ý'
+    222: 240,  # 'Ţ'
+    223: 241,  # 'ß'
+    224: 84,  # 'ŕ'
+    225: 14,  # 'á'
+    226: 75,  # 'â'
+    227: 242,  # 'ă'
+    228: 71,  # 'ä'
+    229: 82,  # 'ĺ'
+    230: 243,  # 'ć'
+    231: 73,  # 'ç'
+    232: 244,  # 'č'
+    233: 15,  # 'é'
+    234: 85,  # 'ę'
+    235: 79,  # 'ë'
+    236: 86,  # 'ě'
+    237: 30,  # 'í'
+    238: 77,  # 'î'
+    239: 87,  # 'ď'
+    240: 245,  # 'đ'
+    241: 246,  # 'ń'
+    242: 247,  # 'ň'
+    243: 25,  # 'ó'
+    244: 74,  # 'ô'
+    245: 42,  # 'ő'
+    246: 24,  # 'ö'
+    247: 248,  # '÷'
+    248: 249,  # 'ř'
+    249: 250,  # 'ů'
+    250: 31,  # 'ú'
+    251: 56,  # 'ű'
+    252: 29,  # 'ü'
+    253: 251,  # 'ý'
+    254: 252,  # 'ţ'
+    255: 253,  # '˙'
+}
+
+WINDOWS_1250_HUNGARIAN_MODEL = SingleByteCharSetModel(
+    charset_name="windows-1250",
+    language="Hungarian",
+    char_to_order_map=WINDOWS_1250_HUNGARIAN_CHAR_TO_ORDER,
+    language_model=HUNGARIAN_LANG_MODEL,
+    typical_positive_ratio=0.947368,
+    keep_ascii_letters=True,
+    alphabet="ABCDEFGHIJKLMNOPRSTUVZabcdefghijklmnoprstuvzÁÉÍÓÖÚÜáéíóöúüŐőŰű",
+)
+
+ISO_8859_2_HUNGARIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 28,  # 'A'
+    66: 40,  # 'B'
+    67: 54,  # 'C'
+    68: 45,  # 'D'
+    69: 32,  # 'E'
+    70: 50,  # 'F'
+    71: 49,  # 'G'
+    72: 38,  # 'H'
+    73: 39,  # 'I'
+    74: 53,  # 'J'
+    75: 36,  # 'K'
+    76: 41,  # 'L'
+    77: 34,  # 'M'
+    78: 35,  # 'N'
+    79: 47,  # 'O'
+    80: 46,  # 'P'
+    81: 71,  # 'Q'
+    82: 43,  # 'R'
+    83: 33,  # 'S'
+    84: 37,  # 'T'
+    85: 57,  # 'U'
+    86: 48,  # 'V'
+    87: 64,  # 'W'
+    88: 68,  # 'X'
+    89: 55,  # 'Y'
+    90: 52,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 2,  # 'a'
+    98: 18,  # 'b'
+    99: 26,  # 'c'
+    100: 17,  # 'd'
+    101: 1,  # 'e'
+    102: 27,  # 'f'
+    103: 12,  # 'g'
+    104: 20,  # 'h'
+    105: 9,  # 'i'
+    106: 22,  # 'j'
+    107: 7,  # 'k'
+    108: 6,  # 'l'
+    109: 13,  # 'm'
+    110: 4,  # 'n'
+    111: 8,  # 'o'
+    112: 23,  # 'p'
+    113: 67,  # 'q'
+    114: 10,  # 'r'
+    115: 5,  # 's'
+    116: 3,  # 't'
+    117: 21,  # 'u'
+    118: 19,  # 'v'
+    119: 65,  # 'w'
+    120: 62,  # 'x'
+    121: 16,  # 'y'
+    122: 11,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 159,  # '\x80'
+    129: 160,  # '\x81'
+    130: 161,  # '\x82'
+    131: 162,  # '\x83'
+    132: 163,  # '\x84'
+    133: 164,  # '\x85'
+    134: 165,  # '\x86'
+    135: 166,  # '\x87'
+    136: 167,  # '\x88'
+    137: 168,  # '\x89'
+    138: 169,  # '\x8a'
+    139: 170,  # '\x8b'
+    140: 171,  # '\x8c'
+    141: 172,  # '\x8d'
+    142: 173,  # '\x8e'
+    143: 174,  # '\x8f'
+    144: 175,  # '\x90'
+    145: 176,  # '\x91'
+    146: 177,  # '\x92'
+    147: 178,  # '\x93'
+    148: 179,  # '\x94'
+    149: 180,  # '\x95'
+    150: 181,  # '\x96'
+    151: 182,  # '\x97'
+    152: 183,  # '\x98'
+    153: 184,  # '\x99'
+    154: 185,  # '\x9a'
+    155: 186,  # '\x9b'
+    156: 187,  # '\x9c'
+    157: 188,  # '\x9d'
+    158: 189,  # '\x9e'
+    159: 190,  # '\x9f'
+    160: 191,  # '\xa0'
+    161: 192,  # 'Ą'
+    162: 193,  # '˘'
+    163: 194,  # 'Ł'
+    164: 195,  # '¤'
+    165: 196,  # 'Ľ'
+    166: 197,  # 'Ś'
+    167: 75,  # '§'
+    168: 198,  # '¨'
+    169: 199,  # 'Š'
+    170: 200,  # 'Ş'
+    171: 201,  # 'Ť'
+    172: 202,  # 'Ź'
+    173: 203,  # '\xad'
+    174: 204,  # 'Ž'
+    175: 205,  # 'Ż'
+    176: 79,  # '°'
+    177: 206,  # 'ą'
+    178: 207,  # '˛'
+    179: 208,  # 'ł'
+    180: 209,  # '´'
+    181: 210,  # 'ľ'
+    182: 211,  # 'ś'
+    183: 212,  # 'ˇ'
+    184: 213,  # '¸'
+    185: 214,  # 'š'
+    186: 215,  # 'ş'
+    187: 216,  # 'ť'
+    188: 217,  # 'ź'
+    189: 218,  # '˝'
+    190: 219,  # 'ž'
+    191: 220,  # 'ż'
+    192: 221,  # 'Ŕ'
+    193: 51,  # 'Á'
+    194: 81,  # 'Â'
+    195: 222,  # 'Ă'
+    196: 78,  # 'Ä'
+    197: 223,  # 'Ĺ'
+    198: 224,  # 'Ć'
+    199: 225,  # 'Ç'
+    200: 226,  # 'Č'
+    201: 44,  # 'É'
+    202: 227,  # 'Ę'
+    203: 228,  # 'Ë'
+    204: 229,  # 'Ě'
+    205: 61,  # 'Í'
+    206: 230,  # 'Î'
+    207: 231,  # 'Ď'
+    208: 232,  # 'Đ'
+    209: 233,  # 'Ń'
+    210: 234,  # 'Ň'
+    211: 58,  # 'Ó'
+    212: 235,  # 'Ô'
+    213: 66,  # 'Ő'
+    214: 59,  # 'Ö'
+    215: 236,  # '×'
+    216: 237,  # 'Ř'
+    217: 238,  # 'Ů'
+    218: 60,  # 'Ú'
+    219: 69,  # 'Ű'
+    220: 63,  # 'Ü'
+    221: 239,  # 'Ý'
+    222: 240,  # 'Ţ'
+    223: 241,  # 'ß'
+    224: 82,  # 'ŕ'
+    225: 14,  # 'á'
+    226: 74,  # 'â'
+    227: 242,  # 'ă'
+    228: 70,  # 'ä'
+    229: 80,  # 'ĺ'
+    230: 243,  # 'ć'
+    231: 72,  # 'ç'
+    232: 244,  # 'č'
+    233: 15,  # 'é'
+    234: 83,  # 'ę'
+    235: 77,  # 'ë'
+    236: 84,  # 'ě'
+    237: 30,  # 'í'
+    238: 76,  # 'î'
+    239: 85,  # 'ď'
+    240: 245,  # 'đ'
+    241: 246,  # 'ń'
+    242: 247,  # 'ň'
+    243: 25,  # 'ó'
+    244: 73,  # 'ô'
+    245: 42,  # 'ő'
+    246: 24,  # 'ö'
+    247: 248,  # '÷'
+    248: 249,  # 'ř'
+    249: 250,  # 'ů'
+    250: 31,  # 'ú'
+    251: 56,  # 'ű'
+    252: 29,  # 'ü'
+    253: 251,  # 'ý'
+    254: 252,  # 'ţ'
+    255: 253,  # '˙'
+}
+
+ISO_8859_2_HUNGARIAN_MODEL = SingleByteCharSetModel(
+    charset_name="ISO-8859-2",
+    language="Hungarian",
+    char_to_order_map=ISO_8859_2_HUNGARIAN_CHAR_TO_ORDER,
+    language_model=HUNGARIAN_LANG_MODEL,
+    typical_positive_ratio=0.947368,
+    keep_ascii_letters=True,
+    alphabet="ABCDEFGHIJKLMNOPRSTUVZabcdefghijklmnoprstuvzÁÉÍÓÖÚÜáéíóöúüŐőŰű",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langrussianmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langrussianmodel.py
new file mode 100644
index 0000000..39a5388
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langrussianmodel.py
@@ -0,0 +1,5725 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+RUSSIAN_LANG_MODEL = {
+    37: {  # 'А'
+        37: 0,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 2,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 1,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 1,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 0,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 0,  # 'и'
+        23: 1,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 0,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 2,  # 'ф'
+        26: 2,  # 'х'
+        28: 0,  # 'ц'
+        22: 1,  # 'ч'
+        25: 2,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    44: {  # 'Б'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 1,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 2,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    33: {  # 'В'
+        37: 2,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 2,  # 'а'
+        21: 1,  # 'б'
+        10: 1,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 2,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 1,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 0,  # 'ю'
+        16: 1,  # 'я'
+    },
+    46: {  # 'Г'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 2,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 1,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    41: {  # 'Д'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 2,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 2,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 3,  # 'ж'
+        20: 1,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    48: {  # 'Е'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 2,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 2,  # 'Р'
+        32: 2,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 0,  # 'а'
+        21: 0,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 2,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 0,  # 'и'
+        23: 2,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 1,  # 'н'
+        1: 0,  # 'о'
+        15: 1,  # 'п'
+        9: 1,  # 'р'
+        7: 3,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 2,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    56: {  # 'Ж'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 1,  # 'б'
+        10: 0,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 2,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 1,  # 'м'
+        5: 0,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 2,  # 'ю'
+        16: 0,  # 'я'
+    },
+    51: {  # 'З'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 0,  # 'г'
+        13: 2,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 1,  # 'л'
+        12: 1,  # 'м'
+        5: 2,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 1,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 1,  # 'я'
+    },
+    42: {  # 'И'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 2,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 2,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 1,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 1,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 2,  # 'з'
+        4: 1,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 1,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 1,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    60: {  # 'Й'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 1,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    36: {  # 'К'
+        37: 2,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 2,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 0,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    49: {  # 'Л'
+        37: 2,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 1,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 0,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 0,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 1,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 1,  # 'л'
+        12: 0,  # 'м'
+        5: 1,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 2,  # 'ю'
+        16: 1,  # 'я'
+    },
+    38: {  # 'М'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 1,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 1,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 1,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 1,  # 'л'
+        12: 1,  # 'м'
+        5: 2,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 1,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    31: {  # 'Н'
+        37: 2,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 1,  # 'З'
+        42: 2,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 1,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 1,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 3,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    34: {  # 'О'
+        37: 0,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 2,  # 'Д'
+        48: 1,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 1,  # 'З'
+        42: 1,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 2,  # 'Л'
+        38: 1,  # 'М'
+        31: 2,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 2,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 1,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 1,  # 'а'
+        21: 2,  # 'б'
+        10: 1,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 0,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 0,  # 'и'
+        23: 1,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 0,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 1,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 2,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    35: {  # 'П'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 2,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 0,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 3,  # 'р'
+        7: 1,  # 'с'
+        6: 1,  # 'т'
+        14: 2,  # 'у'
+        39: 1,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 0,  # 'ю'
+        16: 2,  # 'я'
+    },
+    45: {  # 'Р'
+        37: 2,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 2,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 0,  # 'З'
+        42: 2,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 2,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 1,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 2,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 2,  # 'я'
+    },
+    32: {  # 'С'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 2,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 1,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 2,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 2,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 1,  # 'с'
+        6: 3,  # 'т'
+        14: 2,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 1,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 1,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    40: {  # 'Т'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 2,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 1,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 1,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 1,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    52: {  # 'У'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 1,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 1,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 1,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 2,  # 'и'
+        23: 1,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 1,  # 'н'
+        1: 2,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 0,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    53: {  # 'Ф'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 1,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    55: {  # 'Х'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 2,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 0,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 1,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 1,  # 'ь'
+        30: 1,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    58: {  # 'Ц'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 1,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 1,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 0,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 1,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    50: {  # 'Ч'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 1,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 1,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 1,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 1,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 3,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 1,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    57: {  # 'Ш'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 1,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 1,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 1,  # 'н'
+        1: 2,  # 'о'
+        15: 2,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    63: {  # 'Щ'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 1,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 1,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 1,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 1,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 1,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 1,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    62: {  # 'Ы'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 1,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 0,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 0,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    61: {  # 'Ь'
+        37: 0,  # 'А'
+        44: 1,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 1,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 1,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 1,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 1,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 0,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 0,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 0,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    47: {  # 'Э'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 1,  # 'Й'
+        36: 1,  # 'К'
+        49: 1,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 1,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 1,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 0,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 2,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 0,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 1,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    59: {  # 'Ю'
+        37: 1,  # 'А'
+        44: 1,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 1,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 0,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 1,  # 'б'
+        10: 0,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 0,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 2,  # 'н'
+        1: 0,  # 'о'
+        15: 1,  # 'п'
+        9: 1,  # 'р'
+        7: 1,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    43: {  # 'Я'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 1,  # 'В'
+        46: 1,  # 'Г'
+        41: 0,  # 'Д'
+        48: 1,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 1,  # 'С'
+        40: 1,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 1,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 1,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 1,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 1,  # 'Ю'
+        43: 1,  # 'Я'
+        3: 0,  # 'а'
+        21: 1,  # 'б'
+        10: 1,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 0,  # 'е'
+        24: 0,  # 'ж'
+        20: 1,  # 'з'
+        4: 0,  # 'и'
+        23: 1,  # 'й'
+        11: 1,  # 'к'
+        8: 1,  # 'л'
+        12: 1,  # 'м'
+        5: 2,  # 'н'
+        1: 0,  # 'о'
+        15: 1,  # 'п'
+        9: 1,  # 'р'
+        7: 1,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    3: {  # 'а'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 1,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 3,  # 'и'
+        23: 3,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 3,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 2,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    21: {  # 'б'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 1,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 1,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 0,  # 'ф'
+        26: 2,  # 'х'
+        28: 1,  # 'ц'
+        22: 1,  # 'ч'
+        25: 2,  # 'ш'
+        29: 3,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 2,  # 'ю'
+        16: 3,  # 'я'
+    },
+    10: {  # 'в'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 3,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 3,  # 'ш'
+        29: 2,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 3,  # 'я'
+    },
+    19: {  # 'г'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 3,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    13: {  # 'д'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 3,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 3,  # 'ц'
+        22: 2,  # 'ч'
+        25: 2,  # 'ш'
+        29: 1,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 1,  # 'э'
+        27: 2,  # 'ю'
+        16: 3,  # 'я'
+    },
+    2: {  # 'е'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 2,  # 'и'
+        23: 3,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 2,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 3,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 2,  # 'ю'
+        16: 3,  # 'я'
+    },
+    24: {  # 'ж'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 1,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 1,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 0,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    20: {  # 'з'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 3,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 1,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 3,  # 'я'
+    },
+    4: {  # 'и'
+        37: 1,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 3,  # 'и'
+        23: 3,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 2,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 3,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 2,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    23: {  # 'й'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 1,  # 'а'
+        21: 1,  # 'б'
+        10: 1,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 2,  # 'з'
+        4: 1,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 2,  # 'ф'
+        26: 1,  # 'х'
+        28: 2,  # 'ц'
+        22: 3,  # 'ч'
+        25: 2,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 2,  # 'я'
+    },
+    11: {  # 'к'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 3,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 2,  # 'ц'
+        22: 1,  # 'ч'
+        25: 2,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 1,  # 'ы'
+        17: 1,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    8: {  # 'л'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 3,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 1,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 2,  # 'х'
+        28: 1,  # 'ц'
+        22: 3,  # 'ч'
+        25: 2,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 1,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    12: {  # 'м'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 1,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 2,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 2,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 3,  # 'я'
+    },
+    5: {  # 'н'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 2,  # 'х'
+        28: 3,  # 'ц'
+        22: 3,  # 'ч'
+        25: 2,  # 'ш'
+        29: 2,  # 'щ'
+        54: 1,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 1,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    1: {  # 'о'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 3,  # 'и'
+        23: 3,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 2,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 2,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    15: {  # 'п'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 3,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 3,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 0,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 1,  # 'ш'
+        29: 1,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 2,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 3,  # 'я'
+    },
+    9: {  # 'р'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 2,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 3,  # 'ш'
+        29: 2,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 2,  # 'э'
+        27: 2,  # 'ю'
+        16: 3,  # 'я'
+    },
+    7: {  # 'с'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 1,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 3,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 3,  # 'ч'
+        25: 2,  # 'ш'
+        29: 1,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 2,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    6: {  # 'т'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 2,  # 'б'
+        10: 3,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 2,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 2,  # 'ш'
+        29: 2,  # 'щ'
+        54: 2,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 3,  # 'ь'
+        30: 2,  # 'э'
+        27: 2,  # 'ю'
+        16: 3,  # 'я'
+    },
+    14: {  # 'у'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 3,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 2,  # 'и'
+        23: 2,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 2,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 2,  # 'э'
+        27: 3,  # 'ю'
+        16: 2,  # 'я'
+    },
+    39: {  # 'ф'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 0,  # 'в'
+        19: 1,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 1,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 2,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 1,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 2,  # 'ы'
+        17: 1,  # 'ь'
+        30: 2,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    26: {  # 'х'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 3,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 1,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 1,  # 'п'
+        9: 3,  # 'р'
+        7: 2,  # 'с'
+        6: 2,  # 'т'
+        14: 2,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 1,  # 'ч'
+        25: 2,  # 'ш'
+        29: 0,  # 'щ'
+        54: 1,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 1,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    28: {  # 'ц'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 1,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 1,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 2,  # 'к'
+        8: 1,  # 'л'
+        12: 1,  # 'м'
+        5: 1,  # 'н'
+        1: 3,  # 'о'
+        15: 0,  # 'п'
+        9: 1,  # 'р'
+        7: 0,  # 'с'
+        6: 1,  # 'т'
+        14: 3,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 1,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 3,  # 'ы'
+        17: 1,  # 'ь'
+        30: 0,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    22: {  # 'ч'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 2,  # 'л'
+        12: 1,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 1,  # 'с'
+        6: 3,  # 'т'
+        14: 3,  # 'у'
+        39: 1,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 1,  # 'ч'
+        25: 2,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 3,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    25: {  # 'ш'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 1,  # 'б'
+        10: 2,  # 'в'
+        19: 1,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 2,  # 'м'
+        5: 3,  # 'н'
+        1: 3,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 1,  # 'с'
+        6: 2,  # 'т'
+        14: 3,  # 'у'
+        39: 2,  # 'ф'
+        26: 1,  # 'х'
+        28: 1,  # 'ц'
+        22: 1,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 3,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 0,  # 'я'
+    },
+    29: {  # 'щ'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 3,  # 'а'
+        21: 0,  # 'б'
+        10: 1,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 3,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 3,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 1,  # 'м'
+        5: 2,  # 'н'
+        1: 1,  # 'о'
+        15: 0,  # 'п'
+        9: 2,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 2,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 2,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 0,  # 'я'
+    },
+    54: {  # 'ъ'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 0,  # 'б'
+        10: 0,  # 'в'
+        19: 0,  # 'г'
+        13: 0,  # 'д'
+        2: 2,  # 'е'
+        24: 0,  # 'ж'
+        20: 0,  # 'з'
+        4: 0,  # 'и'
+        23: 0,  # 'й'
+        11: 0,  # 'к'
+        8: 0,  # 'л'
+        12: 0,  # 'м'
+        5: 0,  # 'н'
+        1: 0,  # 'о'
+        15: 0,  # 'п'
+        9: 0,  # 'р'
+        7: 0,  # 'с'
+        6: 0,  # 'т'
+        14: 0,  # 'у'
+        39: 0,  # 'ф'
+        26: 0,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 0,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 1,  # 'ю'
+        16: 2,  # 'я'
+    },
+    18: {  # 'ы'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 3,  # 'б'
+        10: 3,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 2,  # 'и'
+        23: 3,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 1,  # 'о'
+        15: 3,  # 'п'
+        9: 3,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 0,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 3,  # 'ч'
+        25: 3,  # 'ш'
+        29: 2,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 0,  # 'ю'
+        16: 2,  # 'я'
+    },
+    17: {  # 'ь'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 2,  # 'б'
+        10: 2,  # 'в'
+        19: 2,  # 'г'
+        13: 2,  # 'д'
+        2: 3,  # 'е'
+        24: 1,  # 'ж'
+        20: 3,  # 'з'
+        4: 2,  # 'и'
+        23: 0,  # 'й'
+        11: 3,  # 'к'
+        8: 0,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 2,  # 'о'
+        15: 2,  # 'п'
+        9: 1,  # 'р'
+        7: 3,  # 'с'
+        6: 2,  # 'т'
+        14: 0,  # 'у'
+        39: 2,  # 'ф'
+        26: 1,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 3,  # 'ш'
+        29: 2,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 3,  # 'ю'
+        16: 3,  # 'я'
+    },
+    30: {  # 'э'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 1,  # 'М'
+        31: 1,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 1,  # 'Р'
+        32: 1,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 1,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 1,  # 'б'
+        10: 1,  # 'в'
+        19: 1,  # 'г'
+        13: 2,  # 'д'
+        2: 1,  # 'е'
+        24: 0,  # 'ж'
+        20: 1,  # 'з'
+        4: 0,  # 'и'
+        23: 2,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 0,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 2,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 2,  # 'ф'
+        26: 1,  # 'х'
+        28: 0,  # 'ц'
+        22: 0,  # 'ч'
+        25: 1,  # 'ш'
+        29: 0,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 1,  # 'ю'
+        16: 1,  # 'я'
+    },
+    27: {  # 'ю'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 2,  # 'а'
+        21: 3,  # 'б'
+        10: 1,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 1,  # 'е'
+        24: 2,  # 'ж'
+        20: 2,  # 'з'
+        4: 1,  # 'и'
+        23: 1,  # 'й'
+        11: 2,  # 'к'
+        8: 2,  # 'л'
+        12: 2,  # 'м'
+        5: 2,  # 'н'
+        1: 1,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 0,  # 'у'
+        39: 1,  # 'ф'
+        26: 2,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 2,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 1,  # 'э'
+        27: 2,  # 'ю'
+        16: 1,  # 'я'
+    },
+    16: {  # 'я'
+        37: 0,  # 'А'
+        44: 0,  # 'Б'
+        33: 0,  # 'В'
+        46: 0,  # 'Г'
+        41: 0,  # 'Д'
+        48: 0,  # 'Е'
+        56: 0,  # 'Ж'
+        51: 0,  # 'З'
+        42: 0,  # 'И'
+        60: 0,  # 'Й'
+        36: 0,  # 'К'
+        49: 0,  # 'Л'
+        38: 0,  # 'М'
+        31: 0,  # 'Н'
+        34: 0,  # 'О'
+        35: 0,  # 'П'
+        45: 0,  # 'Р'
+        32: 0,  # 'С'
+        40: 0,  # 'Т'
+        52: 0,  # 'У'
+        53: 0,  # 'Ф'
+        55: 0,  # 'Х'
+        58: 0,  # 'Ц'
+        50: 0,  # 'Ч'
+        57: 0,  # 'Ш'
+        63: 0,  # 'Щ'
+        62: 0,  # 'Ы'
+        61: 0,  # 'Ь'
+        47: 0,  # 'Э'
+        59: 0,  # 'Ю'
+        43: 0,  # 'Я'
+        3: 0,  # 'а'
+        21: 2,  # 'б'
+        10: 3,  # 'в'
+        19: 2,  # 'г'
+        13: 3,  # 'д'
+        2: 3,  # 'е'
+        24: 3,  # 'ж'
+        20: 3,  # 'з'
+        4: 2,  # 'и'
+        23: 2,  # 'й'
+        11: 3,  # 'к'
+        8: 3,  # 'л'
+        12: 3,  # 'м'
+        5: 3,  # 'н'
+        1: 0,  # 'о'
+        15: 2,  # 'п'
+        9: 2,  # 'р'
+        7: 3,  # 'с'
+        6: 3,  # 'т'
+        14: 1,  # 'у'
+        39: 1,  # 'ф'
+        26: 3,  # 'х'
+        28: 2,  # 'ц'
+        22: 2,  # 'ч'
+        25: 2,  # 'ш'
+        29: 3,  # 'щ'
+        54: 0,  # 'ъ'
+        18: 0,  # 'ы'
+        17: 0,  # 'ь'
+        30: 0,  # 'э'
+        27: 2,  # 'ю'
+        16: 2,  # 'я'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+IBM866_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 37,  # 'А'
+    129: 44,  # 'Б'
+    130: 33,  # 'В'
+    131: 46,  # 'Г'
+    132: 41,  # 'Д'
+    133: 48,  # 'Е'
+    134: 56,  # 'Ж'
+    135: 51,  # 'З'
+    136: 42,  # 'И'
+    137: 60,  # 'Й'
+    138: 36,  # 'К'
+    139: 49,  # 'Л'
+    140: 38,  # 'М'
+    141: 31,  # 'Н'
+    142: 34,  # 'О'
+    143: 35,  # 'П'
+    144: 45,  # 'Р'
+    145: 32,  # 'С'
+    146: 40,  # 'Т'
+    147: 52,  # 'У'
+    148: 53,  # 'Ф'
+    149: 55,  # 'Х'
+    150: 58,  # 'Ц'
+    151: 50,  # 'Ч'
+    152: 57,  # 'Ш'
+    153: 63,  # 'Щ'
+    154: 70,  # 'Ъ'
+    155: 62,  # 'Ы'
+    156: 61,  # 'Ь'
+    157: 47,  # 'Э'
+    158: 59,  # 'Ю'
+    159: 43,  # 'Я'
+    160: 3,  # 'а'
+    161: 21,  # 'б'
+    162: 10,  # 'в'
+    163: 19,  # 'г'
+    164: 13,  # 'д'
+    165: 2,  # 'е'
+    166: 24,  # 'ж'
+    167: 20,  # 'з'
+    168: 4,  # 'и'
+    169: 23,  # 'й'
+    170: 11,  # 'к'
+    171: 8,  # 'л'
+    172: 12,  # 'м'
+    173: 5,  # 'н'
+    174: 1,  # 'о'
+    175: 15,  # 'п'
+    176: 191,  # '░'
+    177: 192,  # '▒'
+    178: 193,  # '▓'
+    179: 194,  # '│'
+    180: 195,  # '┤'
+    181: 196,  # '╡'
+    182: 197,  # '╢'
+    183: 198,  # '╖'
+    184: 199,  # '╕'
+    185: 200,  # '╣'
+    186: 201,  # '║'
+    187: 202,  # '╗'
+    188: 203,  # '╝'
+    189: 204,  # '╜'
+    190: 205,  # '╛'
+    191: 206,  # '┐'
+    192: 207,  # '└'
+    193: 208,  # '┴'
+    194: 209,  # '┬'
+    195: 210,  # '├'
+    196: 211,  # '─'
+    197: 212,  # '┼'
+    198: 213,  # '╞'
+    199: 214,  # '╟'
+    200: 215,  # '╚'
+    201: 216,  # '╔'
+    202: 217,  # '╩'
+    203: 218,  # '╦'
+    204: 219,  # '╠'
+    205: 220,  # '═'
+    206: 221,  # '╬'
+    207: 222,  # '╧'
+    208: 223,  # '╨'
+    209: 224,  # '╤'
+    210: 225,  # '╥'
+    211: 226,  # '╙'
+    212: 227,  # '╘'
+    213: 228,  # '╒'
+    214: 229,  # '╓'
+    215: 230,  # '╫'
+    216: 231,  # '╪'
+    217: 232,  # '┘'
+    218: 233,  # '┌'
+    219: 234,  # '█'
+    220: 235,  # '▄'
+    221: 236,  # '▌'
+    222: 237,  # '▐'
+    223: 238,  # '▀'
+    224: 9,  # 'р'
+    225: 7,  # 'с'
+    226: 6,  # 'т'
+    227: 14,  # 'у'
+    228: 39,  # 'ф'
+    229: 26,  # 'х'
+    230: 28,  # 'ц'
+    231: 22,  # 'ч'
+    232: 25,  # 'ш'
+    233: 29,  # 'щ'
+    234: 54,  # 'ъ'
+    235: 18,  # 'ы'
+    236: 17,  # 'ь'
+    237: 30,  # 'э'
+    238: 27,  # 'ю'
+    239: 16,  # 'я'
+    240: 239,  # 'Ё'
+    241: 68,  # 'ё'
+    242: 240,  # 'Є'
+    243: 241,  # 'є'
+    244: 242,  # 'Ї'
+    245: 243,  # 'ї'
+    246: 244,  # 'Ў'
+    247: 245,  # 'ў'
+    248: 246,  # '°'
+    249: 247,  # '∙'
+    250: 248,  # '·'
+    251: 249,  # '√'
+    252: 250,  # '№'
+    253: 251,  # '¤'
+    254: 252,  # '■'
+    255: 255,  # '\xa0'
+}
+
+IBM866_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="IBM866",
+    language="Russian",
+    char_to_order_map=IBM866_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
+
+WINDOWS_1251_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 191,  # 'Ђ'
+    129: 192,  # 'Ѓ'
+    130: 193,  # '‚'
+    131: 194,  # 'ѓ'
+    132: 195,  # '„'
+    133: 196,  # '…'
+    134: 197,  # '†'
+    135: 198,  # '‡'
+    136: 199,  # '€'
+    137: 200,  # '‰'
+    138: 201,  # 'Љ'
+    139: 202,  # '‹'
+    140: 203,  # 'Њ'
+    141: 204,  # 'Ќ'
+    142: 205,  # 'Ћ'
+    143: 206,  # 'Џ'
+    144: 207,  # 'ђ'
+    145: 208,  # '‘'
+    146: 209,  # '’'
+    147: 210,  # '“'
+    148: 211,  # '”'
+    149: 212,  # '•'
+    150: 213,  # '–'
+    151: 214,  # '—'
+    152: 215,  # None
+    153: 216,  # '™'
+    154: 217,  # 'љ'
+    155: 218,  # '›'
+    156: 219,  # 'њ'
+    157: 220,  # 'ќ'
+    158: 221,  # 'ћ'
+    159: 222,  # 'џ'
+    160: 223,  # '\xa0'
+    161: 224,  # 'Ў'
+    162: 225,  # 'ў'
+    163: 226,  # 'Ј'
+    164: 227,  # '¤'
+    165: 228,  # 'Ґ'
+    166: 229,  # '¦'
+    167: 230,  # '§'
+    168: 231,  # 'Ё'
+    169: 232,  # '©'
+    170: 233,  # 'Є'
+    171: 234,  # '«'
+    172: 235,  # '¬'
+    173: 236,  # '\xad'
+    174: 237,  # '®'
+    175: 238,  # 'Ї'
+    176: 239,  # '°'
+    177: 240,  # '±'
+    178: 241,  # 'І'
+    179: 242,  # 'і'
+    180: 243,  # 'ґ'
+    181: 244,  # 'µ'
+    182: 245,  # '¶'
+    183: 246,  # '·'
+    184: 68,  # 'ё'
+    185: 247,  # '№'
+    186: 248,  # 'є'
+    187: 249,  # '»'
+    188: 250,  # 'ј'
+    189: 251,  # 'Ѕ'
+    190: 252,  # 'ѕ'
+    191: 253,  # 'ї'
+    192: 37,  # 'А'
+    193: 44,  # 'Б'
+    194: 33,  # 'В'
+    195: 46,  # 'Г'
+    196: 41,  # 'Д'
+    197: 48,  # 'Е'
+    198: 56,  # 'Ж'
+    199: 51,  # 'З'
+    200: 42,  # 'И'
+    201: 60,  # 'Й'
+    202: 36,  # 'К'
+    203: 49,  # 'Л'
+    204: 38,  # 'М'
+    205: 31,  # 'Н'
+    206: 34,  # 'О'
+    207: 35,  # 'П'
+    208: 45,  # 'Р'
+    209: 32,  # 'С'
+    210: 40,  # 'Т'
+    211: 52,  # 'У'
+    212: 53,  # 'Ф'
+    213: 55,  # 'Х'
+    214: 58,  # 'Ц'
+    215: 50,  # 'Ч'
+    216: 57,  # 'Ш'
+    217: 63,  # 'Щ'
+    218: 70,  # 'Ъ'
+    219: 62,  # 'Ы'
+    220: 61,  # 'Ь'
+    221: 47,  # 'Э'
+    222: 59,  # 'Ю'
+    223: 43,  # 'Я'
+    224: 3,  # 'а'
+    225: 21,  # 'б'
+    226: 10,  # 'в'
+    227: 19,  # 'г'
+    228: 13,  # 'д'
+    229: 2,  # 'е'
+    230: 24,  # 'ж'
+    231: 20,  # 'з'
+    232: 4,  # 'и'
+    233: 23,  # 'й'
+    234: 11,  # 'к'
+    235: 8,  # 'л'
+    236: 12,  # 'м'
+    237: 5,  # 'н'
+    238: 1,  # 'о'
+    239: 15,  # 'п'
+    240: 9,  # 'р'
+    241: 7,  # 'с'
+    242: 6,  # 'т'
+    243: 14,  # 'у'
+    244: 39,  # 'ф'
+    245: 26,  # 'х'
+    246: 28,  # 'ц'
+    247: 22,  # 'ч'
+    248: 25,  # 'ш'
+    249: 29,  # 'щ'
+    250: 54,  # 'ъ'
+    251: 18,  # 'ы'
+    252: 17,  # 'ь'
+    253: 30,  # 'э'
+    254: 27,  # 'ю'
+    255: 16,  # 'я'
+}
+
+WINDOWS_1251_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="windows-1251",
+    language="Russian",
+    char_to_order_map=WINDOWS_1251_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
+
+IBM855_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 191,  # 'ђ'
+    129: 192,  # 'Ђ'
+    130: 193,  # 'ѓ'
+    131: 194,  # 'Ѓ'
+    132: 68,  # 'ё'
+    133: 195,  # 'Ё'
+    134: 196,  # 'є'
+    135: 197,  # 'Є'
+    136: 198,  # 'ѕ'
+    137: 199,  # 'Ѕ'
+    138: 200,  # 'і'
+    139: 201,  # 'І'
+    140: 202,  # 'ї'
+    141: 203,  # 'Ї'
+    142: 204,  # 'ј'
+    143: 205,  # 'Ј'
+    144: 206,  # 'љ'
+    145: 207,  # 'Љ'
+    146: 208,  # 'њ'
+    147: 209,  # 'Њ'
+    148: 210,  # 'ћ'
+    149: 211,  # 'Ћ'
+    150: 212,  # 'ќ'
+    151: 213,  # 'Ќ'
+    152: 214,  # 'ў'
+    153: 215,  # 'Ў'
+    154: 216,  # 'џ'
+    155: 217,  # 'Џ'
+    156: 27,  # 'ю'
+    157: 59,  # 'Ю'
+    158: 54,  # 'ъ'
+    159: 70,  # 'Ъ'
+    160: 3,  # 'а'
+    161: 37,  # 'А'
+    162: 21,  # 'б'
+    163: 44,  # 'Б'
+    164: 28,  # 'ц'
+    165: 58,  # 'Ц'
+    166: 13,  # 'д'
+    167: 41,  # 'Д'
+    168: 2,  # 'е'
+    169: 48,  # 'Е'
+    170: 39,  # 'ф'
+    171: 53,  # 'Ф'
+    172: 19,  # 'г'
+    173: 46,  # 'Г'
+    174: 218,  # '«'
+    175: 219,  # '»'
+    176: 220,  # '░'
+    177: 221,  # '▒'
+    178: 222,  # '▓'
+    179: 223,  # '│'
+    180: 224,  # '┤'
+    181: 26,  # 'х'
+    182: 55,  # 'Х'
+    183: 4,  # 'и'
+    184: 42,  # 'И'
+    185: 225,  # '╣'
+    186: 226,  # '║'
+    187: 227,  # '╗'
+    188: 228,  # '╝'
+    189: 23,  # 'й'
+    190: 60,  # 'Й'
+    191: 229,  # '┐'
+    192: 230,  # '└'
+    193: 231,  # '┴'
+    194: 232,  # '┬'
+    195: 233,  # '├'
+    196: 234,  # '─'
+    197: 235,  # '┼'
+    198: 11,  # 'к'
+    199: 36,  # 'К'
+    200: 236,  # '╚'
+    201: 237,  # '╔'
+    202: 238,  # '╩'
+    203: 239,  # '╦'
+    204: 240,  # '╠'
+    205: 241,  # '═'
+    206: 242,  # '╬'
+    207: 243,  # '¤'
+    208: 8,  # 'л'
+    209: 49,  # 'Л'
+    210: 12,  # 'м'
+    211: 38,  # 'М'
+    212: 5,  # 'н'
+    213: 31,  # 'Н'
+    214: 1,  # 'о'
+    215: 34,  # 'О'
+    216: 15,  # 'п'
+    217: 244,  # '┘'
+    218: 245,  # '┌'
+    219: 246,  # '█'
+    220: 247,  # '▄'
+    221: 35,  # 'П'
+    222: 16,  # 'я'
+    223: 248,  # '▀'
+    224: 43,  # 'Я'
+    225: 9,  # 'р'
+    226: 45,  # 'Р'
+    227: 7,  # 'с'
+    228: 32,  # 'С'
+    229: 6,  # 'т'
+    230: 40,  # 'Т'
+    231: 14,  # 'у'
+    232: 52,  # 'У'
+    233: 24,  # 'ж'
+    234: 56,  # 'Ж'
+    235: 10,  # 'в'
+    236: 33,  # 'В'
+    237: 17,  # 'ь'
+    238: 61,  # 'Ь'
+    239: 249,  # '№'
+    240: 250,  # '\xad'
+    241: 18,  # 'ы'
+    242: 62,  # 'Ы'
+    243: 20,  # 'з'
+    244: 51,  # 'З'
+    245: 25,  # 'ш'
+    246: 57,  # 'Ш'
+    247: 30,  # 'э'
+    248: 47,  # 'Э'
+    249: 29,  # 'щ'
+    250: 63,  # 'Щ'
+    251: 22,  # 'ч'
+    252: 50,  # 'Ч'
+    253: 251,  # '§'
+    254: 252,  # '■'
+    255: 255,  # '\xa0'
+}
+
+IBM855_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="IBM855",
+    language="Russian",
+    char_to_order_map=IBM855_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
+
+KOI8_R_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 191,  # '─'
+    129: 192,  # '│'
+    130: 193,  # '┌'
+    131: 194,  # '┐'
+    132: 195,  # '└'
+    133: 196,  # '┘'
+    134: 197,  # '├'
+    135: 198,  # '┤'
+    136: 199,  # '┬'
+    137: 200,  # '┴'
+    138: 201,  # '┼'
+    139: 202,  # '▀'
+    140: 203,  # '▄'
+    141: 204,  # '█'
+    142: 205,  # '▌'
+    143: 206,  # '▐'
+    144: 207,  # '░'
+    145: 208,  # '▒'
+    146: 209,  # '▓'
+    147: 210,  # '⌠'
+    148: 211,  # '■'
+    149: 212,  # '∙'
+    150: 213,  # '√'
+    151: 214,  # '≈'
+    152: 215,  # '≤'
+    153: 216,  # '≥'
+    154: 217,  # '\xa0'
+    155: 218,  # '⌡'
+    156: 219,  # '°'
+    157: 220,  # '²'
+    158: 221,  # '·'
+    159: 222,  # '÷'
+    160: 223,  # '═'
+    161: 224,  # '║'
+    162: 225,  # '╒'
+    163: 68,  # 'ё'
+    164: 226,  # '╓'
+    165: 227,  # '╔'
+    166: 228,  # '╕'
+    167: 229,  # '╖'
+    168: 230,  # '╗'
+    169: 231,  # '╘'
+    170: 232,  # '╙'
+    171: 233,  # '╚'
+    172: 234,  # '╛'
+    173: 235,  # '╜'
+    174: 236,  # '╝'
+    175: 237,  # '╞'
+    176: 238,  # '╟'
+    177: 239,  # '╠'
+    178: 240,  # '╡'
+    179: 241,  # 'Ё'
+    180: 242,  # '╢'
+    181: 243,  # '╣'
+    182: 244,  # '╤'
+    183: 245,  # '╥'
+    184: 246,  # '╦'
+    185: 247,  # '╧'
+    186: 248,  # '╨'
+    187: 249,  # '╩'
+    188: 250,  # '╪'
+    189: 251,  # '╫'
+    190: 252,  # '╬'
+    191: 253,  # '©'
+    192: 27,  # 'ю'
+    193: 3,  # 'а'
+    194: 21,  # 'б'
+    195: 28,  # 'ц'
+    196: 13,  # 'д'
+    197: 2,  # 'е'
+    198: 39,  # 'ф'
+    199: 19,  # 'г'
+    200: 26,  # 'х'
+    201: 4,  # 'и'
+    202: 23,  # 'й'
+    203: 11,  # 'к'
+    204: 8,  # 'л'
+    205: 12,  # 'м'
+    206: 5,  # 'н'
+    207: 1,  # 'о'
+    208: 15,  # 'п'
+    209: 16,  # 'я'
+    210: 9,  # 'р'
+    211: 7,  # 'с'
+    212: 6,  # 'т'
+    213: 14,  # 'у'
+    214: 24,  # 'ж'
+    215: 10,  # 'в'
+    216: 17,  # 'ь'
+    217: 18,  # 'ы'
+    218: 20,  # 'з'
+    219: 25,  # 'ш'
+    220: 30,  # 'э'
+    221: 29,  # 'щ'
+    222: 22,  # 'ч'
+    223: 54,  # 'ъ'
+    224: 59,  # 'Ю'
+    225: 37,  # 'А'
+    226: 44,  # 'Б'
+    227: 58,  # 'Ц'
+    228: 41,  # 'Д'
+    229: 48,  # 'Е'
+    230: 53,  # 'Ф'
+    231: 46,  # 'Г'
+    232: 55,  # 'Х'
+    233: 42,  # 'И'
+    234: 60,  # 'Й'
+    235: 36,  # 'К'
+    236: 49,  # 'Л'
+    237: 38,  # 'М'
+    238: 31,  # 'Н'
+    239: 34,  # 'О'
+    240: 35,  # 'П'
+    241: 43,  # 'Я'
+    242: 45,  # 'Р'
+    243: 32,  # 'С'
+    244: 40,  # 'Т'
+    245: 52,  # 'У'
+    246: 56,  # 'Ж'
+    247: 33,  # 'В'
+    248: 61,  # 'Ь'
+    249: 62,  # 'Ы'
+    250: 51,  # 'З'
+    251: 57,  # 'Ш'
+    252: 47,  # 'Э'
+    253: 63,  # 'Щ'
+    254: 50,  # 'Ч'
+    255: 70,  # 'Ъ'
+}
+
+KOI8_R_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="KOI8-R",
+    language="Russian",
+    char_to_order_map=KOI8_R_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
+
+MACCYRILLIC_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 37,  # 'А'
+    129: 44,  # 'Б'
+    130: 33,  # 'В'
+    131: 46,  # 'Г'
+    132: 41,  # 'Д'
+    133: 48,  # 'Е'
+    134: 56,  # 'Ж'
+    135: 51,  # 'З'
+    136: 42,  # 'И'
+    137: 60,  # 'Й'
+    138: 36,  # 'К'
+    139: 49,  # 'Л'
+    140: 38,  # 'М'
+    141: 31,  # 'Н'
+    142: 34,  # 'О'
+    143: 35,  # 'П'
+    144: 45,  # 'Р'
+    145: 32,  # 'С'
+    146: 40,  # 'Т'
+    147: 52,  # 'У'
+    148: 53,  # 'Ф'
+    149: 55,  # 'Х'
+    150: 58,  # 'Ц'
+    151: 50,  # 'Ч'
+    152: 57,  # 'Ш'
+    153: 63,  # 'Щ'
+    154: 70,  # 'Ъ'
+    155: 62,  # 'Ы'
+    156: 61,  # 'Ь'
+    157: 47,  # 'Э'
+    158: 59,  # 'Ю'
+    159: 43,  # 'Я'
+    160: 191,  # '†'
+    161: 192,  # '°'
+    162: 193,  # 'Ґ'
+    163: 194,  # '£'
+    164: 195,  # '§'
+    165: 196,  # '•'
+    166: 197,  # '¶'
+    167: 198,  # 'І'
+    168: 199,  # '®'
+    169: 200,  # '©'
+    170: 201,  # '™'
+    171: 202,  # 'Ђ'
+    172: 203,  # 'ђ'
+    173: 204,  # '≠'
+    174: 205,  # 'Ѓ'
+    175: 206,  # 'ѓ'
+    176: 207,  # '∞'
+    177: 208,  # '±'
+    178: 209,  # '≤'
+    179: 210,  # '≥'
+    180: 211,  # 'і'
+    181: 212,  # 'µ'
+    182: 213,  # 'ґ'
+    183: 214,  # 'Ј'
+    184: 215,  # 'Є'
+    185: 216,  # 'є'
+    186: 217,  # 'Ї'
+    187: 218,  # 'ї'
+    188: 219,  # 'Љ'
+    189: 220,  # 'љ'
+    190: 221,  # 'Њ'
+    191: 222,  # 'њ'
+    192: 223,  # 'ј'
+    193: 224,  # 'Ѕ'
+    194: 225,  # '¬'
+    195: 226,  # '√'
+    196: 227,  # 'ƒ'
+    197: 228,  # '≈'
+    198: 229,  # '∆'
+    199: 230,  # '«'
+    200: 231,  # '»'
+    201: 232,  # '…'
+    202: 233,  # '\xa0'
+    203: 234,  # 'Ћ'
+    204: 235,  # 'ћ'
+    205: 236,  # 'Ќ'
+    206: 237,  # 'ќ'
+    207: 238,  # 'ѕ'
+    208: 239,  # '–'
+    209: 240,  # '—'
+    210: 241,  # '“'
+    211: 242,  # '”'
+    212: 243,  # '‘'
+    213: 244,  # '’'
+    214: 245,  # '÷'
+    215: 246,  # '„'
+    216: 247,  # 'Ў'
+    217: 248,  # 'ў'
+    218: 249,  # 'Џ'
+    219: 250,  # 'џ'
+    220: 251,  # '№'
+    221: 252,  # 'Ё'
+    222: 68,  # 'ё'
+    223: 16,  # 'я'
+    224: 3,  # 'а'
+    225: 21,  # 'б'
+    226: 10,  # 'в'
+    227: 19,  # 'г'
+    228: 13,  # 'д'
+    229: 2,  # 'е'
+    230: 24,  # 'ж'
+    231: 20,  # 'з'
+    232: 4,  # 'и'
+    233: 23,  # 'й'
+    234: 11,  # 'к'
+    235: 8,  # 'л'
+    236: 12,  # 'м'
+    237: 5,  # 'н'
+    238: 1,  # 'о'
+    239: 15,  # 'п'
+    240: 9,  # 'р'
+    241: 7,  # 'с'
+    242: 6,  # 'т'
+    243: 14,  # 'у'
+    244: 39,  # 'ф'
+    245: 26,  # 'х'
+    246: 28,  # 'ц'
+    247: 22,  # 'ч'
+    248: 25,  # 'ш'
+    249: 29,  # 'щ'
+    250: 54,  # 'ъ'
+    251: 18,  # 'ы'
+    252: 17,  # 'ь'
+    253: 30,  # 'э'
+    254: 27,  # 'ю'
+    255: 255,  # '€'
+}
+
+MACCYRILLIC_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="MacCyrillic",
+    language="Russian",
+    char_to_order_map=MACCYRILLIC_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
+
+ISO_8859_5_RUSSIAN_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 142,  # 'A'
+    66: 143,  # 'B'
+    67: 144,  # 'C'
+    68: 145,  # 'D'
+    69: 146,  # 'E'
+    70: 147,  # 'F'
+    71: 148,  # 'G'
+    72: 149,  # 'H'
+    73: 150,  # 'I'
+    74: 151,  # 'J'
+    75: 152,  # 'K'
+    76: 74,  # 'L'
+    77: 153,  # 'M'
+    78: 75,  # 'N'
+    79: 154,  # 'O'
+    80: 155,  # 'P'
+    81: 156,  # 'Q'
+    82: 157,  # 'R'
+    83: 158,  # 'S'
+    84: 159,  # 'T'
+    85: 160,  # 'U'
+    86: 161,  # 'V'
+    87: 162,  # 'W'
+    88: 163,  # 'X'
+    89: 164,  # 'Y'
+    90: 165,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 71,  # 'a'
+    98: 172,  # 'b'
+    99: 66,  # 'c'
+    100: 173,  # 'd'
+    101: 65,  # 'e'
+    102: 174,  # 'f'
+    103: 76,  # 'g'
+    104: 175,  # 'h'
+    105: 64,  # 'i'
+    106: 176,  # 'j'
+    107: 177,  # 'k'
+    108: 77,  # 'l'
+    109: 72,  # 'm'
+    110: 178,  # 'n'
+    111: 69,  # 'o'
+    112: 67,  # 'p'
+    113: 179,  # 'q'
+    114: 78,  # 'r'
+    115: 73,  # 's'
+    116: 180,  # 't'
+    117: 181,  # 'u'
+    118: 79,  # 'v'
+    119: 182,  # 'w'
+    120: 183,  # 'x'
+    121: 184,  # 'y'
+    122: 185,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 191,  # '\x80'
+    129: 192,  # '\x81'
+    130: 193,  # '\x82'
+    131: 194,  # '\x83'
+    132: 195,  # '\x84'
+    133: 196,  # '\x85'
+    134: 197,  # '\x86'
+    135: 198,  # '\x87'
+    136: 199,  # '\x88'
+    137: 200,  # '\x89'
+    138: 201,  # '\x8a'
+    139: 202,  # '\x8b'
+    140: 203,  # '\x8c'
+    141: 204,  # '\x8d'
+    142: 205,  # '\x8e'
+    143: 206,  # '\x8f'
+    144: 207,  # '\x90'
+    145: 208,  # '\x91'
+    146: 209,  # '\x92'
+    147: 210,  # '\x93'
+    148: 211,  # '\x94'
+    149: 212,  # '\x95'
+    150: 213,  # '\x96'
+    151: 214,  # '\x97'
+    152: 215,  # '\x98'
+    153: 216,  # '\x99'
+    154: 217,  # '\x9a'
+    155: 218,  # '\x9b'
+    156: 219,  # '\x9c'
+    157: 220,  # '\x9d'
+    158: 221,  # '\x9e'
+    159: 222,  # '\x9f'
+    160: 223,  # '\xa0'
+    161: 224,  # 'Ё'
+    162: 225,  # 'Ђ'
+    163: 226,  # 'Ѓ'
+    164: 227,  # 'Є'
+    165: 228,  # 'Ѕ'
+    166: 229,  # 'І'
+    167: 230,  # 'Ї'
+    168: 231,  # 'Ј'
+    169: 232,  # 'Љ'
+    170: 233,  # 'Њ'
+    171: 234,  # 'Ћ'
+    172: 235,  # 'Ќ'
+    173: 236,  # '\xad'
+    174: 237,  # 'Ў'
+    175: 238,  # 'Џ'
+    176: 37,  # 'А'
+    177: 44,  # 'Б'
+    178: 33,  # 'В'
+    179: 46,  # 'Г'
+    180: 41,  # 'Д'
+    181: 48,  # 'Е'
+    182: 56,  # 'Ж'
+    183: 51,  # 'З'
+    184: 42,  # 'И'
+    185: 60,  # 'Й'
+    186: 36,  # 'К'
+    187: 49,  # 'Л'
+    188: 38,  # 'М'
+    189: 31,  # 'Н'
+    190: 34,  # 'О'
+    191: 35,  # 'П'
+    192: 45,  # 'Р'
+    193: 32,  # 'С'
+    194: 40,  # 'Т'
+    195: 52,  # 'У'
+    196: 53,  # 'Ф'
+    197: 55,  # 'Х'
+    198: 58,  # 'Ц'
+    199: 50,  # 'Ч'
+    200: 57,  # 'Ш'
+    201: 63,  # 'Щ'
+    202: 70,  # 'Ъ'
+    203: 62,  # 'Ы'
+    204: 61,  # 'Ь'
+    205: 47,  # 'Э'
+    206: 59,  # 'Ю'
+    207: 43,  # 'Я'
+    208: 3,  # 'а'
+    209: 21,  # 'б'
+    210: 10,  # 'в'
+    211: 19,  # 'г'
+    212: 13,  # 'д'
+    213: 2,  # 'е'
+    214: 24,  # 'ж'
+    215: 20,  # 'з'
+    216: 4,  # 'и'
+    217: 23,  # 'й'
+    218: 11,  # 'к'
+    219: 8,  # 'л'
+    220: 12,  # 'м'
+    221: 5,  # 'н'
+    222: 1,  # 'о'
+    223: 15,  # 'п'
+    224: 9,  # 'р'
+    225: 7,  # 'с'
+    226: 6,  # 'т'
+    227: 14,  # 'у'
+    228: 39,  # 'ф'
+    229: 26,  # 'х'
+    230: 28,  # 'ц'
+    231: 22,  # 'ч'
+    232: 25,  # 'ш'
+    233: 29,  # 'щ'
+    234: 54,  # 'ъ'
+    235: 18,  # 'ы'
+    236: 17,  # 'ь'
+    237: 30,  # 'э'
+    238: 27,  # 'ю'
+    239: 16,  # 'я'
+    240: 239,  # '№'
+    241: 68,  # 'ё'
+    242: 240,  # 'ђ'
+    243: 241,  # 'ѓ'
+    244: 242,  # 'є'
+    245: 243,  # 'ѕ'
+    246: 244,  # 'і'
+    247: 245,  # 'ї'
+    248: 246,  # 'ј'
+    249: 247,  # 'љ'
+    250: 248,  # 'њ'
+    251: 249,  # 'ћ'
+    252: 250,  # 'ќ'
+    253: 251,  # '§'
+    254: 252,  # 'ў'
+    255: 255,  # 'џ'
+}
+
+ISO_8859_5_RUSSIAN_MODEL = SingleByteCharSetModel(
+    charset_name="ISO-8859-5",
+    language="Russian",
+    char_to_order_map=ISO_8859_5_RUSSIAN_CHAR_TO_ORDER,
+    language_model=RUSSIAN_LANG_MODEL,
+    typical_positive_ratio=0.976601,
+    keep_ascii_letters=False,
+    alphabet="ЁАБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯабвгдежзийклмнопрстуфхцчшщъыьэюяё",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langthaimodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langthaimodel.py
new file mode 100644
index 0000000..489cad9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langthaimodel.py
@@ -0,0 +1,4380 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+THAI_LANG_MODEL = {
+    5: {  # 'ก'
+        5: 2,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 2,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 3,  # 'ฎ'
+        57: 2,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 2,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 3,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 1,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 1,  # 'ย'
+        2: 3,  # 'ร'
+        61: 2,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 3,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 3,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 3,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 1,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 3,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    30: {  # 'ข'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 1,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 2,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 2,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 1,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 2,  # '่'
+        7: 3,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    24: {  # 'ค'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 2,  # 'ค'
+        8: 2,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 2,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 0,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 2,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 3,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 2,  # 'า'
+        36: 3,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 1,  # 'เ'
+        28: 0,  # 'แ'
+        41: 3,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    8: {  # 'ง'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 3,  # 'ค'
+        8: 2,  # 'ง'
+        26: 2,  # 'จ'
+        52: 1,  # 'ฉ'
+        34: 2,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 1,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 1,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 1,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 3,  # 'ๆ'
+        37: 0,  # '็'
+        6: 2,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    26: {  # 'จ'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 0,  # 'ค'
+        8: 2,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 1,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 1,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 1,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 3,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 3,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 2,  # '่'
+        7: 2,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    52: {  # 'ฉ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 3,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 3,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 1,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 1,  # 'ั'
+        1: 1,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    34: {  # 'ช'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 1,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 1,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 1,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 3,  # 'า'
+        36: 1,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 1,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    51: {  # 'ซ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 1,  # 'ั'
+        1: 1,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 1,  # 'ู'
+        11: 1,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 1,  # '่'
+        7: 2,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    47: {  # 'ญ'
+        5: 1,  # 'ก'
+        30: 1,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 3,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 2,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 0,  # '็'
+        6: 2,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    58: {  # 'ฎ'
+        5: 2,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 1,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    57: {  # 'ฏ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    49: {  # 'ฐ'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 2,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    53: {  # 'ฑ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    55: {  # 'ฒ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    43: {  # 'ณ'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 3,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 3,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 1,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 3,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    20: {  # 'ด'
+        5: 2,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 3,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 2,  # 'า'
+        36: 2,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 1,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 2,  # 'ๆ'
+        37: 2,  # '็'
+        6: 1,  # '่'
+        7: 3,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    19: {  # 'ต'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 1,  # 'ต'
+        44: 2,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 2,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 1,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 0,  # 'ห'
+        4: 3,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 1,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 2,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    44: {  # 'ถ'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 2,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 2,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    14: {  # 'ท'
+        5: 1,  # 'ก'
+        30: 1,  # 'ข'
+        24: 3,  # 'ค'
+        8: 1,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 3,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 3,  # 'ย'
+        2: 3,  # 'ร'
+        61: 1,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 2,  # 'ว'
+        42: 3,  # 'ศ'
+        46: 1,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 3,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 2,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 1,  # 'ู'
+        11: 0,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    48: {  # 'ธ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 1,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 2,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    3: {  # 'น'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 3,  # 'ค'
+        8: 1,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 1,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 2,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 3,  # 'ธ'
+        3: 2,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 1,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 3,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 3,  # 'โ'
+        29: 3,  # 'ใ'
+        33: 3,  # 'ไ'
+        50: 2,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    17: {  # 'บ'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 1,  # 'ง'
+        26: 1,  # 'จ'
+        52: 1,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 2,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 2,  # '่'
+        7: 2,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    25: {  # 'ป'
+        5: 2,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 1,  # 'ฎ'
+        57: 3,  # 'ฏ'
+        49: 1,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 1,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 0,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 1,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 1,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 2,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 3,  # '็'
+        6: 1,  # '่'
+        7: 2,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    39: {  # 'ผ'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 1,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 2,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 1,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 1,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    62: {  # 'ฝ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 1,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 2,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 2,  # '่'
+        7: 1,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    31: {  # 'พ'
+        5: 1,  # 'ก'
+        30: 1,  # 'ข'
+        24: 1,  # 'ค'
+        8: 1,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 1,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 0,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 2,  # 'ย'
+        2: 3,  # 'ร'
+        61: 2,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 1,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 1,  # '็'
+        6: 0,  # '่'
+        7: 1,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    54: {  # 'ฟ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 2,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 1,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 2,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    45: {  # 'ภ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    9: {  # 'ม'
+        5: 2,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 2,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 1,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 3,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 1,  # 'ย'
+        2: 2,  # 'ร'
+        61: 2,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 1,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 2,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 2,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    16: {  # 'ย'
+        5: 3,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 2,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 0,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 3,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 1,  # 'ึ'
+        27: 2,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 2,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 2,  # 'ๆ'
+        37: 1,  # '็'
+        6: 3,  # '่'
+        7: 2,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    2: {  # 'ร'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 2,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 3,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 3,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 3,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 2,  # 'น'
+        17: 2,  # 'บ'
+        25: 3,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 2,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 3,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 2,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 3,  # 'เ'
+        28: 3,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 3,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 3,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    61: {  # 'ฤ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 2,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    15: {  # 'ล'
+        5: 2,  # 'ก'
+        30: 3,  # 'ข'
+        24: 1,  # 'ค'
+        8: 3,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 3,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 3,  # 'อ'
+        63: 2,  # 'ฯ'
+        22: 3,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 2,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 2,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 2,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    12: {  # 'ว'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 1,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 1,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 1,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 3,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 2,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 2,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    42: {  # 'ศ'
+        5: 1,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 1,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 2,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 2,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 3,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 2,  # 'ู'
+        11: 0,  # 'เ'
+        28: 1,  # 'แ'
+        41: 0,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    46: {  # 'ษ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 2,  # 'ฎ'
+        57: 1,  # 'ฏ'
+        49: 2,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 3,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 2,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    18: {  # 'ส'
+        5: 2,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 2,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 3,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 2,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 1,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 3,  # 'ำ'
+        23: 3,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 2,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 3,  # 'ู'
+        11: 2,  # 'เ'
+        28: 0,  # 'แ'
+        41: 1,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 1,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    21: {  # 'ห'
+        5: 3,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 1,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 3,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 0,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 0,  # 'ำ'
+        23: 1,  # 'ิ'
+        13: 1,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 1,  # 'ุ'
+        35: 1,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 3,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    4: {  # 'อ'
+        5: 3,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 3,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 2,  # 'ะ'
+        10: 3,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 2,  # 'ิ'
+        13: 3,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 3,  # 'ื'
+        32: 3,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 1,  # '็'
+        6: 2,  # '่'
+        7: 2,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    63: {  # 'ฯ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    22: {  # 'ะ'
+        5: 3,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 1,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 3,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 2,  # 'น'
+        17: 3,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 2,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    10: {  # 'ั'
+        5: 3,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 3,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 3,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 2,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 3,  # 'ฒ'
+        43: 3,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 3,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    1: {  # 'า'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 3,  # 'ค'
+        8: 3,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 3,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 3,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 2,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 3,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 3,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 3,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 3,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 2,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 3,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    36: {  # 'ำ'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 3,  # 'ค'
+        8: 2,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 1,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 1,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 3,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    23: {  # 'ิ'
+        5: 3,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 3,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 3,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 3,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 2,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 3,  # 'ศ'
+        46: 2,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 3,  # 'ห'
+        4: 1,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 2,  # '้'
+        38: 2,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    13: {  # 'ี'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 1,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 3,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 2,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    40: {  # 'ึ'
+        5: 3,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 3,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    27: {  # 'ื'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 3,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    32: {  # 'ุ'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 3,  # 'ค'
+        8: 3,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 1,  # 'ฒ'
+        43: 3,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 2,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 1,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 1,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 2,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 1,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 0,  # 'แ'
+        41: 1,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 2,  # '้'
+        38: 1,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    35: {  # 'ู'
+        5: 3,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 2,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 2,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 1,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 2,  # 'น'
+        17: 0,  # 'บ'
+        25: 3,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 1,  # 'แ'
+        41: 1,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 3,  # '่'
+        7: 3,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    11: {  # 'เ'
+        5: 3,  # 'ก'
+        30: 3,  # 'ข'
+        24: 3,  # 'ค'
+        8: 2,  # 'ง'
+        26: 3,  # 'จ'
+        52: 3,  # 'ฉ'
+        34: 3,  # 'ช'
+        51: 2,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 1,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 3,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 3,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 3,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 3,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 3,  # 'ว'
+        42: 2,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    28: {  # 'แ'
+        5: 3,  # 'ก'
+        30: 2,  # 'ข'
+        24: 2,  # 'ค'
+        8: 1,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 3,  # 'ต'
+        44: 2,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 2,  # 'ป'
+        39: 3,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 2,  # 'พ'
+        54: 2,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    41: {  # 'โ'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 1,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 1,  # 'บ'
+        25: 3,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 1,  # 'ภ'
+        9: 1,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 3,  # 'ล'
+        12: 0,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 0,  # 'ห'
+        4: 2,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    29: {  # 'ใ'
+        5: 2,  # 'ก'
+        30: 0,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 3,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 1,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 3,  # 'ส'
+        21: 3,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    33: {  # 'ไ'
+        5: 1,  # 'ก'
+        30: 2,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 3,  # 'ด'
+        19: 1,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 3,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 1,  # 'บ'
+        25: 3,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 2,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 0,  # 'ย'
+        2: 3,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 3,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 2,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    50: {  # 'ๆ'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    37: {  # '็'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 2,  # 'ง'
+        26: 3,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 1,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 2,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 3,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 1,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 2,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 0,  # 'ห'
+        4: 1,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 1,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    6: {  # '่'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 1,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 1,  # 'ธ'
+        3: 3,  # 'น'
+        17: 1,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 1,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 3,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 2,  # 'ล'
+        12: 3,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 1,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 1,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 3,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 1,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    7: {  # '้'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 2,  # 'ค'
+        8: 3,  # 'ง'
+        26: 2,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 1,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 1,  # 'ด'
+        19: 2,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 2,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 3,  # 'น'
+        17: 2,  # 'บ'
+        25: 2,  # 'ป'
+        39: 2,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 3,  # 'ม'
+        16: 2,  # 'ย'
+        2: 2,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 3,  # 'ว'
+        42: 1,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 2,  # 'ส'
+        21: 2,  # 'ห'
+        4: 3,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 3,  # 'า'
+        36: 2,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 2,  # 'ใ'
+        33: 2,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    38: {  # '์'
+        5: 2,  # 'ก'
+        30: 1,  # 'ข'
+        24: 1,  # 'ค'
+        8: 0,  # 'ง'
+        26: 1,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 1,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 2,  # 'ด'
+        19: 1,  # 'ต'
+        44: 1,  # 'ถ'
+        14: 1,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 1,  # 'น'
+        17: 1,  # 'บ'
+        25: 1,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 1,  # 'พ'
+        54: 1,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 2,  # 'ม'
+        16: 0,  # 'ย'
+        2: 1,  # 'ร'
+        61: 1,  # 'ฤ'
+        15: 1,  # 'ล'
+        12: 1,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 1,  # 'ส'
+        21: 1,  # 'ห'
+        4: 2,  # 'อ'
+        63: 1,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 2,  # 'เ'
+        28: 2,  # 'แ'
+        41: 1,  # 'โ'
+        29: 1,  # 'ใ'
+        33: 1,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 0,  # '๑'
+        59: 0,  # '๒'
+        60: 0,  # '๕'
+    },
+    56: {  # '๑'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 2,  # '๑'
+        59: 1,  # '๒'
+        60: 1,  # '๕'
+    },
+    59: {  # '๒'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 1,  # '๑'
+        59: 1,  # '๒'
+        60: 3,  # '๕'
+    },
+    60: {  # '๕'
+        5: 0,  # 'ก'
+        30: 0,  # 'ข'
+        24: 0,  # 'ค'
+        8: 0,  # 'ง'
+        26: 0,  # 'จ'
+        52: 0,  # 'ฉ'
+        34: 0,  # 'ช'
+        51: 0,  # 'ซ'
+        47: 0,  # 'ญ'
+        58: 0,  # 'ฎ'
+        57: 0,  # 'ฏ'
+        49: 0,  # 'ฐ'
+        53: 0,  # 'ฑ'
+        55: 0,  # 'ฒ'
+        43: 0,  # 'ณ'
+        20: 0,  # 'ด'
+        19: 0,  # 'ต'
+        44: 0,  # 'ถ'
+        14: 0,  # 'ท'
+        48: 0,  # 'ธ'
+        3: 0,  # 'น'
+        17: 0,  # 'บ'
+        25: 0,  # 'ป'
+        39: 0,  # 'ผ'
+        62: 0,  # 'ฝ'
+        31: 0,  # 'พ'
+        54: 0,  # 'ฟ'
+        45: 0,  # 'ภ'
+        9: 0,  # 'ม'
+        16: 0,  # 'ย'
+        2: 0,  # 'ร'
+        61: 0,  # 'ฤ'
+        15: 0,  # 'ล'
+        12: 0,  # 'ว'
+        42: 0,  # 'ศ'
+        46: 0,  # 'ษ'
+        18: 0,  # 'ส'
+        21: 0,  # 'ห'
+        4: 0,  # 'อ'
+        63: 0,  # 'ฯ'
+        22: 0,  # 'ะ'
+        10: 0,  # 'ั'
+        1: 0,  # 'า'
+        36: 0,  # 'ำ'
+        23: 0,  # 'ิ'
+        13: 0,  # 'ี'
+        40: 0,  # 'ึ'
+        27: 0,  # 'ื'
+        32: 0,  # 'ุ'
+        35: 0,  # 'ู'
+        11: 0,  # 'เ'
+        28: 0,  # 'แ'
+        41: 0,  # 'โ'
+        29: 0,  # 'ใ'
+        33: 0,  # 'ไ'
+        50: 0,  # 'ๆ'
+        37: 0,  # '็'
+        6: 0,  # '่'
+        7: 0,  # '้'
+        38: 0,  # '์'
+        56: 2,  # '๑'
+        59: 1,  # '๒'
+        60: 0,  # '๕'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+TIS_620_THAI_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 254,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 254,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 253,  # ' '
+    33: 253,  # '!'
+    34: 253,  # '"'
+    35: 253,  # '#'
+    36: 253,  # '$'
+    37: 253,  # '%'
+    38: 253,  # '&'
+    39: 253,  # "'"
+    40: 253,  # '('
+    41: 253,  # ')'
+    42: 253,  # '*'
+    43: 253,  # '+'
+    44: 253,  # ','
+    45: 253,  # '-'
+    46: 253,  # '.'
+    47: 253,  # '/'
+    48: 252,  # '0'
+    49: 252,  # '1'
+    50: 252,  # '2'
+    51: 252,  # '3'
+    52: 252,  # '4'
+    53: 252,  # '5'
+    54: 252,  # '6'
+    55: 252,  # '7'
+    56: 252,  # '8'
+    57: 252,  # '9'
+    58: 253,  # ':'
+    59: 253,  # ';'
+    60: 253,  # '<'
+    61: 253,  # '='
+    62: 253,  # '>'
+    63: 253,  # '?'
+    64: 253,  # '@'
+    65: 182,  # 'A'
+    66: 106,  # 'B'
+    67: 107,  # 'C'
+    68: 100,  # 'D'
+    69: 183,  # 'E'
+    70: 184,  # 'F'
+    71: 185,  # 'G'
+    72: 101,  # 'H'
+    73: 94,  # 'I'
+    74: 186,  # 'J'
+    75: 187,  # 'K'
+    76: 108,  # 'L'
+    77: 109,  # 'M'
+    78: 110,  # 'N'
+    79: 111,  # 'O'
+    80: 188,  # 'P'
+    81: 189,  # 'Q'
+    82: 190,  # 'R'
+    83: 89,  # 'S'
+    84: 95,  # 'T'
+    85: 112,  # 'U'
+    86: 113,  # 'V'
+    87: 191,  # 'W'
+    88: 192,  # 'X'
+    89: 193,  # 'Y'
+    90: 194,  # 'Z'
+    91: 253,  # '['
+    92: 253,  # '\\'
+    93: 253,  # ']'
+    94: 253,  # '^'
+    95: 253,  # '_'
+    96: 253,  # '`'
+    97: 64,  # 'a'
+    98: 72,  # 'b'
+    99: 73,  # 'c'
+    100: 114,  # 'd'
+    101: 74,  # 'e'
+    102: 115,  # 'f'
+    103: 116,  # 'g'
+    104: 102,  # 'h'
+    105: 81,  # 'i'
+    106: 201,  # 'j'
+    107: 117,  # 'k'
+    108: 90,  # 'l'
+    109: 103,  # 'm'
+    110: 78,  # 'n'
+    111: 82,  # 'o'
+    112: 96,  # 'p'
+    113: 202,  # 'q'
+    114: 91,  # 'r'
+    115: 79,  # 's'
+    116: 84,  # 't'
+    117: 104,  # 'u'
+    118: 105,  # 'v'
+    119: 97,  # 'w'
+    120: 98,  # 'x'
+    121: 92,  # 'y'
+    122: 203,  # 'z'
+    123: 253,  # '{'
+    124: 253,  # '|'
+    125: 253,  # '}'
+    126: 253,  # '~'
+    127: 253,  # '\x7f'
+    128: 209,  # '\x80'
+    129: 210,  # '\x81'
+    130: 211,  # '\x82'
+    131: 212,  # '\x83'
+    132: 213,  # '\x84'
+    133: 88,  # '\x85'
+    134: 214,  # '\x86'
+    135: 215,  # '\x87'
+    136: 216,  # '\x88'
+    137: 217,  # '\x89'
+    138: 218,  # '\x8a'
+    139: 219,  # '\x8b'
+    140: 220,  # '\x8c'
+    141: 118,  # '\x8d'
+    142: 221,  # '\x8e'
+    143: 222,  # '\x8f'
+    144: 223,  # '\x90'
+    145: 224,  # '\x91'
+    146: 99,  # '\x92'
+    147: 85,  # '\x93'
+    148: 83,  # '\x94'
+    149: 225,  # '\x95'
+    150: 226,  # '\x96'
+    151: 227,  # '\x97'
+    152: 228,  # '\x98'
+    153: 229,  # '\x99'
+    154: 230,  # '\x9a'
+    155: 231,  # '\x9b'
+    156: 232,  # '\x9c'
+    157: 233,  # '\x9d'
+    158: 234,  # '\x9e'
+    159: 235,  # '\x9f'
+    160: 236,  # None
+    161: 5,  # 'ก'
+    162: 30,  # 'ข'
+    163: 237,  # 'ฃ'
+    164: 24,  # 'ค'
+    165: 238,  # 'ฅ'
+    166: 75,  # 'ฆ'
+    167: 8,  # 'ง'
+    168: 26,  # 'จ'
+    169: 52,  # 'ฉ'
+    170: 34,  # 'ช'
+    171: 51,  # 'ซ'
+    172: 119,  # 'ฌ'
+    173: 47,  # 'ญ'
+    174: 58,  # 'ฎ'
+    175: 57,  # 'ฏ'
+    176: 49,  # 'ฐ'
+    177: 53,  # 'ฑ'
+    178: 55,  # 'ฒ'
+    179: 43,  # 'ณ'
+    180: 20,  # 'ด'
+    181: 19,  # 'ต'
+    182: 44,  # 'ถ'
+    183: 14,  # 'ท'
+    184: 48,  # 'ธ'
+    185: 3,  # 'น'
+    186: 17,  # 'บ'
+    187: 25,  # 'ป'
+    188: 39,  # 'ผ'
+    189: 62,  # 'ฝ'
+    190: 31,  # 'พ'
+    191: 54,  # 'ฟ'
+    192: 45,  # 'ภ'
+    193: 9,  # 'ม'
+    194: 16,  # 'ย'
+    195: 2,  # 'ร'
+    196: 61,  # 'ฤ'
+    197: 15,  # 'ล'
+    198: 239,  # 'ฦ'
+    199: 12,  # 'ว'
+    200: 42,  # 'ศ'
+    201: 46,  # 'ษ'
+    202: 18,  # 'ส'
+    203: 21,  # 'ห'
+    204: 76,  # 'ฬ'
+    205: 4,  # 'อ'
+    206: 66,  # 'ฮ'
+    207: 63,  # 'ฯ'
+    208: 22,  # 'ะ'
+    209: 10,  # 'ั'
+    210: 1,  # 'า'
+    211: 36,  # 'ำ'
+    212: 23,  # 'ิ'
+    213: 13,  # 'ี'
+    214: 40,  # 'ึ'
+    215: 27,  # 'ื'
+    216: 32,  # 'ุ'
+    217: 35,  # 'ู'
+    218: 86,  # 'ฺ'
+    219: 240,  # None
+    220: 241,  # None
+    221: 242,  # None
+    222: 243,  # None
+    223: 244,  # '฿'
+    224: 11,  # 'เ'
+    225: 28,  # 'แ'
+    226: 41,  # 'โ'
+    227: 29,  # 'ใ'
+    228: 33,  # 'ไ'
+    229: 245,  # 'ๅ'
+    230: 50,  # 'ๆ'
+    231: 37,  # '็'
+    232: 6,  # '่'
+    233: 7,  # '้'
+    234: 67,  # '๊'
+    235: 77,  # '๋'
+    236: 38,  # '์'
+    237: 93,  # 'ํ'
+    238: 246,  # '๎'
+    239: 247,  # '๏'
+    240: 68,  # '๐'
+    241: 56,  # '๑'
+    242: 59,  # '๒'
+    243: 65,  # '๓'
+    244: 69,  # '๔'
+    245: 60,  # '๕'
+    246: 70,  # '๖'
+    247: 80,  # '๗'
+    248: 71,  # '๘'
+    249: 87,  # '๙'
+    250: 248,  # '๚'
+    251: 249,  # '๛'
+    252: 250,  # None
+    253: 251,  # None
+    254: 252,  # None
+    255: 253,  # None
+}
+
+TIS_620_THAI_MODEL = SingleByteCharSetModel(
+    charset_name="TIS-620",
+    language="Thai",
+    char_to_order_map=TIS_620_THAI_CHAR_TO_ORDER,
+    language_model=THAI_LANG_MODEL,
+    typical_positive_ratio=0.926386,
+    keep_ascii_letters=False,
+    alphabet="กขฃคฅฆงจฉชซฌญฎฏฐฑฒณดตถทธนบปผฝพฟภมยรฤลฦวศษสหฬอฮฯะัาำิีึืฺุู฿เแโใไๅๆ็่้๊๋์ํ๎๏๐๑๒๓๔๕๖๗๘๙๚๛",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langturkishmodel.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langturkishmodel.py
new file mode 100644
index 0000000..291857c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/langturkishmodel.py
@@ -0,0 +1,4380 @@
+from pip._vendor.chardet.sbcharsetprober import SingleByteCharSetModel
+
+# 3: Positive
+# 2: Likely
+# 1: Unlikely
+# 0: Negative
+
+TURKISH_LANG_MODEL = {
+    23: {  # 'A'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 1,  # 'h'
+        3: 1,  # 'i'
+        24: 0,  # 'j'
+        10: 2,  # 'k'
+        5: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 1,  # 'r'
+        8: 1,  # 's'
+        9: 1,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    37: {  # 'B'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 2,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    47: {  # 'C'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 1,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 2,  # 'j'
+        10: 1,  # 'k'
+        5: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 2,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 2,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    39: {  # 'D'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 1,  # 'l'
+        13: 3,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    29: {  # 'E'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 1,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 0,  # 'h'
+        3: 1,  # 'i'
+        24: 1,  # 'j'
+        10: 0,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 1,  # 's'
+        9: 1,  # 't'
+        14: 1,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    52: {  # 'F'
+        23: 0,  # 'A'
+        37: 1,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 1,  # 'E'
+        52: 2,  # 'F'
+        36: 0,  # 'G'
+        45: 2,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 1,  # 'b'
+        28: 1,  # 'c'
+        12: 1,  # 'd'
+        2: 0,  # 'e'
+        18: 1,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 2,  # 'i'
+        24: 1,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 2,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 2,  # 'r'
+        8: 1,  # 's'
+        9: 1,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 1,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 2,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 2,  # 'ş'
+    },
+    36: {  # 'G'
+        23: 1,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 2,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 2,  # 'N'
+        42: 1,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 1,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 1,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 0,  # 'r'
+        8: 1,  # 's'
+        9: 1,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 1,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 2,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    45: {  # 'H'
+        23: 0,  # 'A'
+        37: 1,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 2,  # 'G'
+        45: 1,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 1,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 2,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 2,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 1,  # 'p'
+        7: 1,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 0,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    53: {  # 'I'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    60: {  # 'J'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 1,  # 'd'
+        2: 0,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 1,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 1,  # 's'
+        9: 0,  # 't'
+        14: 0,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    16: {  # 'K'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 1,  # 'e'
+        18: 3,  # 'f'
+        27: 3,  # 'g'
+        25: 3,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 0,  # 'u'
+        32: 3,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    49: {  # 'L'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 2,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 2,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 0,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 2,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 2,  # 'n'
+        15: 1,  # 'o'
+        26: 1,  # 'p'
+        7: 1,  # 'r'
+        8: 1,  # 's'
+        9: 1,  # 't'
+        14: 0,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 2,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 1,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    20: {  # 'M'
+        23: 1,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 1,  # 'h'
+        3: 2,  # 'i'
+        24: 2,  # 'j'
+        10: 2,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 0,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    46: {  # 'N'
+        23: 0,  # 'A'
+        37: 1,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 2,  # 'j'
+        10: 1,  # 'k'
+        5: 1,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 1,  # 'o'
+        26: 1,  # 'p'
+        7: 1,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 1,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 2,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    42: {  # 'O'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 1,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 2,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 2,  # 'İ'
+        6: 1,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    48: {  # 'P'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 2,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 2,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 2,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 0,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    44: {  # 'R'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 1,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 1,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 1,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    35: {  # 'S'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 1,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 1,  # 'l'
+        13: 2,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 1,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 2,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    31: {  # 'T'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 0,  # 'c'
+        12: 1,  # 'd'
+        2: 3,  # 'e'
+        18: 2,  # 'f'
+        27: 2,  # 'g'
+        25: 0,  # 'h'
+        3: 1,  # 'i'
+        24: 1,  # 'j'
+        10: 2,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 2,  # 'p'
+        7: 2,  # 'r'
+        8: 0,  # 's'
+        9: 2,  # 't'
+        14: 2,  # 'u'
+        32: 1,  # 'v'
+        57: 1,  # 'w'
+        58: 1,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    51: {  # 'U'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 1,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 2,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 1,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 0,  # 'o'
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+        7: 0,  # 'r'
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+        9: 0,  # 't'
+        14: 2,  # 'u'
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+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    38: {  # 'V'
+        23: 1,  # 'A'
+        37: 1,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 2,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 2,  # 'o'
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+        8: 0,  # 's'
+        9: 1,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 1,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 1,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 3,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    62: {  # 'W'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
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+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
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+        43: 0,  # 'Y'
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+        1: 0,  # 'a'
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+        12: 0,  # 'd'
+        2: 0,  # 'e'
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+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
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+        13: 0,  # 'm'
+        4: 0,  # 'n'
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+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    43: {  # 'Y'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 0,  # 'G'
+        45: 1,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 2,  # 'N'
+        42: 0,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 1,  # 'j'
+        10: 1,  # 'k'
+        5: 1,  # 'l'
+        13: 3,  # 'm'
+        4: 0,  # 'n'
+        15: 2,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 1,  # 'Ü'
+        59: 1,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 0,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    56: {  # 'Z'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 2,  # 'Z'
+        1: 2,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 2,  # 'i'
+        24: 1,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 1,  # 'r'
+        8: 1,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
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+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    1: {  # 'a'
+        23: 3,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 3,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 2,  # 'Z'
+        1: 2,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 2,  # 'e'
+        18: 3,  # 'f'
+        27: 3,  # 'g'
+        25: 3,  # 'h'
+        3: 3,  # 'i'
+        24: 3,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
+        26: 3,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 3,  # 'v'
+        57: 2,  # 'w'
+        58: 0,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 1,  # 'î'
+        34: 1,  # 'ö'
+        17: 3,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    21: {  # 'b'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 3,  # 'g'
+        25: 1,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 3,  # 'p'
+        7: 1,  # 'r'
+        8: 2,  # 's'
+        9: 2,  # 't'
+        14: 2,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    28: {  # 'c'
+        23: 0,  # 'A'
+        37: 1,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 2,  # 'E'
+        52: 0,  # 'F'
+        36: 2,  # 'G'
+        45: 2,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 2,  # 'T'
+        51: 2,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 3,  # 'Y'
+        56: 0,  # 'Z'
+        1: 1,  # 'a'
+        21: 1,  # 'b'
+        28: 2,  # 'c'
+        12: 2,  # 'd'
+        2: 1,  # 'e'
+        18: 1,  # 'f'
+        27: 2,  # 'g'
+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 1,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 2,  # 'o'
+        26: 2,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 1,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 1,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 1,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 1,  # 'î'
+        34: 2,  # 'ö'
+        17: 2,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 2,  # 'ş'
+    },
+    12: {  # 'd'
+        23: 1,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 2,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
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+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 1,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 1,  # 'f'
+        27: 3,  # 'g'
+        25: 3,  # 'h'
+        3: 2,  # 'i'
+        24: 3,  # 'j'
+        10: 2,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
+        26: 2,  # 'p'
+        7: 3,  # 'r'
+        8: 2,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 3,  # 'y'
+        22: 1,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    2: {  # 'e'
+        23: 2,  # 'A'
+        37: 0,  # 'B'
+        47: 2,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 0,  # 'S'
+        31: 3,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 2,  # 'e'
+        18: 3,  # 'f'
+        27: 3,  # 'g'
+        25: 3,  # 'h'
+        3: 3,  # 'i'
+        24: 3,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
+        26: 3,  # 'p'
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+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
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+        57: 2,  # 'w'
+        58: 0,  # 'x'
+        11: 3,  # 'y'
+        22: 1,  # 'z'
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+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 3,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    18: {  # 'f'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 2,  # 'f'
+        27: 1,  # 'g'
+        25: 1,  # 'h'
+        3: 1,  # 'i'
+        24: 1,  # 'j'
+        10: 1,  # 'k'
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+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
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+        7: 1,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 1,  # 'u'
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+        57: 0,  # 'w'
+        58: 0,  # 'x'
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+        22: 0,  # 'z'
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+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    27: {  # 'g'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
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+        60: 0,  # 'J'
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+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
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+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 1,  # 'd'
+        2: 3,  # 'e'
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+        27: 2,  # 'g'
+        25: 1,  # 'h'
+        3: 2,  # 'i'
+        24: 3,  # 'j'
+        10: 2,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
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+        8: 2,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
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+        22: 0,  # 'z'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    25: {  # 'h'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
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+        43: 0,  # 'Y'
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+        1: 3,  # 'a'
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+        12: 2,  # 'd'
+        2: 3,  # 'e'
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+        27: 1,  # 'g'
+        25: 2,  # 'h'
+        3: 2,  # 'i'
+        24: 3,  # 'j'
+        10: 3,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
+        32: 2,  # 'v'
+        57: 1,  # 'w'
+        58: 0,  # 'x'
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+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    3: {  # 'i'
+        23: 2,  # 'A'
+        37: 0,  # 'B'
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+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 0,  # 'N'
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+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 2,  # 'T'
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+        38: 1,  # 'V'
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+        43: 0,  # 'Y'
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+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 2,  # 'f'
+        27: 3,  # 'g'
+        25: 1,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
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+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
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+        9: 3,  # 't'
+        14: 3,  # 'u'
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+        57: 1,  # 'w'
+        58: 1,  # 'x'
+        11: 3,  # 'y'
+        22: 1,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 1,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 3,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    24: {  # 'j'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 2,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 1,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 2,  # 'f'
+        27: 1,  # 'g'
+        25: 1,  # 'h'
+        3: 2,  # 'i'
+        24: 1,  # 'j'
+        10: 2,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 2,  # 'r'
+        8: 3,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
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+        57: 0,  # 'w'
+        58: 2,  # 'x'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    10: {  # 'k'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 3,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
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+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
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+        12: 2,  # 'd'
+        2: 3,  # 'e'
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+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 2,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 3,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    5: {  # 'l'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
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+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
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+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
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+        1: 0,  # 'a'
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+        12: 3,  # 'd'
+        2: 1,  # 'e'
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+        27: 3,  # 'g'
+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 3,  # 'n'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
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+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    13: {  # 'm'
+        23: 1,  # 'A'
+        37: 0,  # 'B'
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+        39: 0,  # 'D'
+        29: 3,  # 'E'
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+        60: 0,  # 'J'
+        16: 0,  # 'K'
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+        20: 3,  # 'M'
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+        1: 2,  # 'a'
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+        3: 3,  # 'i'
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+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    4: {  # 'n'
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+        47: 0,  # 'C'
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+        29: 0,  # 'E'
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+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 2,  # 'J'
+        16: 3,  # 'K'
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+        1: 3,  # 'a'
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+        12: 3,  # 'd'
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+        3: 2,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
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+        4: 3,  # 'n'
+        15: 1,  # 'o'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
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+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    15: {  # 'o'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 2,  # 'L'
+        20: 0,  # 'M'
+        46: 2,  # 'N'
+        42: 1,  # 'O'
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+        44: 1,  # 'R'
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+        3: 1,  # 'i'
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+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
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+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 2,  # 'İ'
+        6: 3,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 2,  # 'ş'
+    },
+    26: {  # 'p'
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+        37: 0,  # 'B'
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+        39: 0,  # 'D'
+        29: 0,  # 'E'
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+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
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+        27: 1,  # 'g'
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+        3: 2,  # 'i'
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+        58: 1,  # 'x'
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+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
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+        33: 3,  # 'ç'
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+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    7: {  # 'r'
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+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 1,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 2,  # 'J'
+        16: 3,  # 'K'
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+        44: 0,  # 'R'
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+        31: 2,  # 'T'
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+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
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+        27: 2,  # 'g'
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+        3: 2,  # 'i'
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+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    8: {  # 's'
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+        12: 3,  # 'd'
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+        25: 2,  # 'h'
+        3: 2,  # 'i'
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+        4: 3,  # 'n'
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+        33: 2,  # 'ç'
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+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
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+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    9: {  # 't'
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+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 2,  # 'f'
+        27: 2,  # 'g'
+        25: 2,  # 'h'
+        3: 2,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 2,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 3,  # 'v'
+        57: 0,  # 'w'
+        58: 2,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    14: {  # 'u'
+        23: 3,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 2,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 3,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 2,  # 'Z'
+        1: 2,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 2,  # 'e'
+        18: 2,  # 'f'
+        27: 3,  # 'g'
+        25: 3,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 3,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 2,  # 'v'
+        57: 2,  # 'w'
+        58: 0,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 3,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    32: {  # 'v'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 1,  # 'j'
+        10: 1,  # 'k'
+        5: 3,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 1,  # 'r'
+        8: 2,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    57: {  # 'w'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 1,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 1,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 1,  # 's'
+        9: 0,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 2,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    58: {  # 'x'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 1,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 1,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 2,  # 'i'
+        24: 2,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 2,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 1,  # 'r'
+        8: 2,  # 's'
+        9: 1,  # 't'
+        14: 0,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    11: {  # 'y'
+        23: 1,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 2,  # 'g'
+        25: 2,  # 'h'
+        3: 2,  # 'i'
+        24: 1,  # 'j'
+        10: 2,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 2,  # 'r'
+        8: 1,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 1,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 3,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    22: {  # 'z'
+        23: 2,  # 'A'
+        37: 2,  # 'B'
+        47: 1,  # 'C'
+        39: 2,  # 'D'
+        29: 3,  # 'E'
+        52: 1,  # 'F'
+        36: 2,  # 'G'
+        45: 2,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 2,  # 'N'
+        42: 2,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 3,  # 'T'
+        51: 2,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 1,  # 'Z'
+        1: 1,  # 'a'
+        21: 2,  # 'b'
+        28: 1,  # 'c'
+        12: 2,  # 'd'
+        2: 2,  # 'e'
+        18: 3,  # 'f'
+        27: 2,  # 'g'
+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 2,  # 'o'
+        26: 2,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 0,  # 'u'
+        32: 2,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 3,  # 'y'
+        22: 2,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 2,  # 'Ü'
+        59: 1,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 2,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 3,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 2,  # 'ş'
+    },
+    63: {  # '·'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 0,  # 'd'
+        2: 1,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    54: {  # 'Ç'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 1,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 1,  # 'b'
+        28: 0,  # 'c'
+        12: 1,  # 'd'
+        2: 0,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 0,  # 'h'
+        3: 3,  # 'i'
+        24: 0,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 2,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 2,  # 'r'
+        8: 0,  # 's'
+        9: 1,  # 't'
+        14: 0,  # 'u'
+        32: 2,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 2,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    50: {  # 'Ö'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 2,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 2,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 1,  # 'N'
+        42: 2,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 2,  # 'b'
+        28: 1,  # 'c'
+        12: 2,  # 'd'
+        2: 0,  # 'e'
+        18: 1,  # 'f'
+        27: 1,  # 'g'
+        25: 1,  # 'h'
+        3: 2,  # 'i'
+        24: 0,  # 'j'
+        10: 2,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 3,  # 'n'
+        15: 2,  # 'o'
+        26: 2,  # 'p'
+        7: 3,  # 'r'
+        8: 1,  # 's'
+        9: 2,  # 't'
+        14: 0,  # 'u'
+        32: 1,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 2,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    55: {  # 'Ü'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 1,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 1,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 1,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 1,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 1,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 0,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    59: {  # 'â'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 0,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 2,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 2,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    33: {  # 'ç'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 3,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 0,  # 'Z'
+        1: 0,  # 'a'
+        21: 3,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 0,  # 'e'
+        18: 2,  # 'f'
+        27: 1,  # 'g'
+        25: 3,  # 'h'
+        3: 3,  # 'i'
+        24: 0,  # 'j'
+        10: 3,  # 'k'
+        5: 0,  # 'l'
+        13: 0,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 2,  # 's'
+        9: 3,  # 't'
+        14: 0,  # 'u'
+        32: 2,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 1,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    61: {  # 'î'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 0,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 0,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 2,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 1,  # 'j'
+        10: 0,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 1,  # 'n'
+        15: 0,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 1,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 1,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 1,  # 'î'
+        34: 0,  # 'ö'
+        17: 0,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 1,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    34: {  # 'ö'
+        23: 0,  # 'A'
+        37: 1,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 1,  # 'G'
+        45: 1,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 1,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 2,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 2,  # 'c'
+        12: 1,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 2,  # 'g'
+        25: 2,  # 'h'
+        3: 1,  # 'i'
+        24: 2,  # 'j'
+        10: 1,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 2,  # 'n'
+        15: 2,  # 'o'
+        26: 0,  # 'p'
+        7: 0,  # 'r'
+        8: 3,  # 's'
+        9: 1,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 1,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 0,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 1,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    17: {  # 'ü'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 0,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 1,  # 'J'
+        16: 1,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 0,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 0,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 0,  # 'c'
+        12: 1,  # 'd'
+        2: 3,  # 'e'
+        18: 1,  # 'f'
+        27: 2,  # 'g'
+        25: 0,  # 'h'
+        3: 1,  # 'i'
+        24: 1,  # 'j'
+        10: 2,  # 'k'
+        5: 3,  # 'l'
+        13: 2,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 2,  # 'p'
+        7: 2,  # 'r'
+        8: 3,  # 's'
+        9: 2,  # 't'
+        14: 3,  # 'u'
+        32: 1,  # 'v'
+        57: 1,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 2,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    30: {  # 'ğ'
+        23: 0,  # 'A'
+        37: 2,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 1,  # 'M'
+        46: 2,  # 'N'
+        42: 2,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 0,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 2,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 0,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 2,  # 'e'
+        18: 0,  # 'f'
+        27: 0,  # 'g'
+        25: 0,  # 'h'
+        3: 0,  # 'i'
+        24: 3,  # 'j'
+        10: 1,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 0,  # 'n'
+        15: 1,  # 'o'
+        26: 0,  # 'p'
+        7: 1,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 2,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 2,  # 'İ'
+        6: 2,  # 'ı'
+        40: 2,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    41: {  # 'İ'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 1,  # 'E'
+        52: 0,  # 'F'
+        36: 2,  # 'G'
+        45: 2,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 2,  # 'P'
+        44: 0,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 0,  # 'Z'
+        1: 1,  # 'a'
+        21: 2,  # 'b'
+        28: 1,  # 'c'
+        12: 2,  # 'd'
+        2: 1,  # 'e'
+        18: 0,  # 'f'
+        27: 3,  # 'g'
+        25: 2,  # 'h'
+        3: 2,  # 'i'
+        24: 2,  # 'j'
+        10: 2,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 3,  # 'n'
+        15: 1,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 2,  # 't'
+        14: 0,  # 'u'
+        32: 0,  # 'v'
+        57: 1,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 1,  # 'Ü'
+        59: 1,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 1,  # 'ö'
+        17: 1,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+    6: {  # 'ı'
+        23: 2,  # 'A'
+        37: 0,  # 'B'
+        47: 0,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 2,  # 'J'
+        16: 3,  # 'K'
+        49: 0,  # 'L'
+        20: 3,  # 'M'
+        46: 1,  # 'N'
+        42: 0,  # 'O'
+        48: 0,  # 'P'
+        44: 0,  # 'R'
+        35: 0,  # 'S'
+        31: 2,  # 'T'
+        51: 0,  # 'U'
+        38: 0,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 1,  # 'Z'
+        1: 3,  # 'a'
+        21: 2,  # 'b'
+        28: 1,  # 'c'
+        12: 3,  # 'd'
+        2: 3,  # 'e'
+        18: 3,  # 'f'
+        27: 3,  # 'g'
+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 3,  # 'j'
+        10: 3,  # 'k'
+        5: 3,  # 'l'
+        13: 3,  # 'm'
+        4: 3,  # 'n'
+        15: 0,  # 'o'
+        26: 3,  # 'p'
+        7: 3,  # 'r'
+        8: 3,  # 's'
+        9: 3,  # 't'
+        14: 3,  # 'u'
+        32: 3,  # 'v'
+        57: 1,  # 'w'
+        58: 1,  # 'x'
+        11: 3,  # 'y'
+        22: 0,  # 'z'
+        63: 1,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 2,  # 'ç'
+        61: 0,  # 'î'
+        34: 0,  # 'ö'
+        17: 3,  # 'ü'
+        30: 0,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 3,  # 'ı'
+        40: 0,  # 'Ş'
+        19: 0,  # 'ş'
+    },
+    40: {  # 'Ş'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 1,  # 'D'
+        29: 1,  # 'E'
+        52: 0,  # 'F'
+        36: 1,  # 'G'
+        45: 2,  # 'H'
+        53: 1,  # 'I'
+        60: 0,  # 'J'
+        16: 0,  # 'K'
+        49: 0,  # 'L'
+        20: 2,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 2,  # 'P'
+        44: 2,  # 'R'
+        35: 1,  # 'S'
+        31: 1,  # 'T'
+        51: 0,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 2,  # 'Y'
+        56: 1,  # 'Z'
+        1: 0,  # 'a'
+        21: 2,  # 'b'
+        28: 0,  # 'c'
+        12: 2,  # 'd'
+        2: 0,  # 'e'
+        18: 3,  # 'f'
+        27: 0,  # 'g'
+        25: 2,  # 'h'
+        3: 3,  # 'i'
+        24: 2,  # 'j'
+        10: 1,  # 'k'
+        5: 0,  # 'l'
+        13: 1,  # 'm'
+        4: 3,  # 'n'
+        15: 2,  # 'o'
+        26: 0,  # 'p'
+        7: 3,  # 'r'
+        8: 2,  # 's'
+        9: 2,  # 't'
+        14: 1,  # 'u'
+        32: 3,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 2,  # 'y'
+        22: 0,  # 'z'
+        63: 0,  # '·'
+        54: 0,  # 'Ç'
+        50: 0,  # 'Ö'
+        55: 1,  # 'Ü'
+        59: 0,  # 'â'
+        33: 0,  # 'ç'
+        61: 0,  # 'î'
+        34: 2,  # 'ö'
+        17: 1,  # 'ü'
+        30: 2,  # 'ğ'
+        41: 0,  # 'İ'
+        6: 2,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 2,  # 'ş'
+    },
+    19: {  # 'ş'
+        23: 0,  # 'A'
+        37: 0,  # 'B'
+        47: 1,  # 'C'
+        39: 0,  # 'D'
+        29: 0,  # 'E'
+        52: 2,  # 'F'
+        36: 1,  # 'G'
+        45: 0,  # 'H'
+        53: 0,  # 'I'
+        60: 0,  # 'J'
+        16: 3,  # 'K'
+        49: 2,  # 'L'
+        20: 0,  # 'M'
+        46: 1,  # 'N'
+        42: 1,  # 'O'
+        48: 1,  # 'P'
+        44: 1,  # 'R'
+        35: 1,  # 'S'
+        31: 0,  # 'T'
+        51: 1,  # 'U'
+        38: 1,  # 'V'
+        62: 0,  # 'W'
+        43: 1,  # 'Y'
+        56: 0,  # 'Z'
+        1: 3,  # 'a'
+        21: 1,  # 'b'
+        28: 2,  # 'c'
+        12: 0,  # 'd'
+        2: 3,  # 'e'
+        18: 0,  # 'f'
+        27: 2,  # 'g'
+        25: 1,  # 'h'
+        3: 1,  # 'i'
+        24: 0,  # 'j'
+        10: 2,  # 'k'
+        5: 2,  # 'l'
+        13: 3,  # 'm'
+        4: 0,  # 'n'
+        15: 0,  # 'o'
+        26: 1,  # 'p'
+        7: 3,  # 'r'
+        8: 0,  # 's'
+        9: 0,  # 't'
+        14: 3,  # 'u'
+        32: 0,  # 'v'
+        57: 0,  # 'w'
+        58: 0,  # 'x'
+        11: 0,  # 'y'
+        22: 2,  # 'z'
+        63: 0,  # '·'
+        54: 1,  # 'Ç'
+        50: 2,  # 'Ö'
+        55: 0,  # 'Ü'
+        59: 0,  # 'â'
+        33: 1,  # 'ç'
+        61: 1,  # 'î'
+        34: 2,  # 'ö'
+        17: 0,  # 'ü'
+        30: 1,  # 'ğ'
+        41: 1,  # 'İ'
+        6: 1,  # 'ı'
+        40: 1,  # 'Ş'
+        19: 1,  # 'ş'
+    },
+}
+
+# 255: Undefined characters that did not exist in training text
+# 254: Carriage/Return
+# 253: symbol (punctuation) that does not belong to word
+# 252: 0 - 9
+# 251: Control characters
+
+# Character Mapping Table(s):
+ISO_8859_9_TURKISH_CHAR_TO_ORDER = {
+    0: 255,  # '\x00'
+    1: 255,  # '\x01'
+    2: 255,  # '\x02'
+    3: 255,  # '\x03'
+    4: 255,  # '\x04'
+    5: 255,  # '\x05'
+    6: 255,  # '\x06'
+    7: 255,  # '\x07'
+    8: 255,  # '\x08'
+    9: 255,  # '\t'
+    10: 255,  # '\n'
+    11: 255,  # '\x0b'
+    12: 255,  # '\x0c'
+    13: 255,  # '\r'
+    14: 255,  # '\x0e'
+    15: 255,  # '\x0f'
+    16: 255,  # '\x10'
+    17: 255,  # '\x11'
+    18: 255,  # '\x12'
+    19: 255,  # '\x13'
+    20: 255,  # '\x14'
+    21: 255,  # '\x15'
+    22: 255,  # '\x16'
+    23: 255,  # '\x17'
+    24: 255,  # '\x18'
+    25: 255,  # '\x19'
+    26: 255,  # '\x1a'
+    27: 255,  # '\x1b'
+    28: 255,  # '\x1c'
+    29: 255,  # '\x1d'
+    30: 255,  # '\x1e'
+    31: 255,  # '\x1f'
+    32: 255,  # ' '
+    33: 255,  # '!'
+    34: 255,  # '"'
+    35: 255,  # '#'
+    36: 255,  # '$'
+    37: 255,  # '%'
+    38: 255,  # '&'
+    39: 255,  # "'"
+    40: 255,  # '('
+    41: 255,  # ')'
+    42: 255,  # '*'
+    43: 255,  # '+'
+    44: 255,  # ','
+    45: 255,  # '-'
+    46: 255,  # '.'
+    47: 255,  # '/'
+    48: 255,  # '0'
+    49: 255,  # '1'
+    50: 255,  # '2'
+    51: 255,  # '3'
+    52: 255,  # '4'
+    53: 255,  # '5'
+    54: 255,  # '6'
+    55: 255,  # '7'
+    56: 255,  # '8'
+    57: 255,  # '9'
+    58: 255,  # ':'
+    59: 255,  # ';'
+    60: 255,  # '<'
+    61: 255,  # '='
+    62: 255,  # '>'
+    63: 255,  # '?'
+    64: 255,  # '@'
+    65: 23,  # 'A'
+    66: 37,  # 'B'
+    67: 47,  # 'C'
+    68: 39,  # 'D'
+    69: 29,  # 'E'
+    70: 52,  # 'F'
+    71: 36,  # 'G'
+    72: 45,  # 'H'
+    73: 53,  # 'I'
+    74: 60,  # 'J'
+    75: 16,  # 'K'
+    76: 49,  # 'L'
+    77: 20,  # 'M'
+    78: 46,  # 'N'
+    79: 42,  # 'O'
+    80: 48,  # 'P'
+    81: 69,  # 'Q'
+    82: 44,  # 'R'
+    83: 35,  # 'S'
+    84: 31,  # 'T'
+    85: 51,  # 'U'
+    86: 38,  # 'V'
+    87: 62,  # 'W'
+    88: 65,  # 'X'
+    89: 43,  # 'Y'
+    90: 56,  # 'Z'
+    91: 255,  # '['
+    92: 255,  # '\\'
+    93: 255,  # ']'
+    94: 255,  # '^'
+    95: 255,  # '_'
+    96: 255,  # '`'
+    97: 1,  # 'a'
+    98: 21,  # 'b'
+    99: 28,  # 'c'
+    100: 12,  # 'd'
+    101: 2,  # 'e'
+    102: 18,  # 'f'
+    103: 27,  # 'g'
+    104: 25,  # 'h'
+    105: 3,  # 'i'
+    106: 24,  # 'j'
+    107: 10,  # 'k'
+    108: 5,  # 'l'
+    109: 13,  # 'm'
+    110: 4,  # 'n'
+    111: 15,  # 'o'
+    112: 26,  # 'p'
+    113: 64,  # 'q'
+    114: 7,  # 'r'
+    115: 8,  # 's'
+    116: 9,  # 't'
+    117: 14,  # 'u'
+    118: 32,  # 'v'
+    119: 57,  # 'w'
+    120: 58,  # 'x'
+    121: 11,  # 'y'
+    122: 22,  # 'z'
+    123: 255,  # '{'
+    124: 255,  # '|'
+    125: 255,  # '}'
+    126: 255,  # '~'
+    127: 255,  # '\x7f'
+    128: 180,  # '\x80'
+    129: 179,  # '\x81'
+    130: 178,  # '\x82'
+    131: 177,  # '\x83'
+    132: 176,  # '\x84'
+    133: 175,  # '\x85'
+    134: 174,  # '\x86'
+    135: 173,  # '\x87'
+    136: 172,  # '\x88'
+    137: 171,  # '\x89'
+    138: 170,  # '\x8a'
+    139: 169,  # '\x8b'
+    140: 168,  # '\x8c'
+    141: 167,  # '\x8d'
+    142: 166,  # '\x8e'
+    143: 165,  # '\x8f'
+    144: 164,  # '\x90'
+    145: 163,  # '\x91'
+    146: 162,  # '\x92'
+    147: 161,  # '\x93'
+    148: 160,  # '\x94'
+    149: 159,  # '\x95'
+    150: 101,  # '\x96'
+    151: 158,  # '\x97'
+    152: 157,  # '\x98'
+    153: 156,  # '\x99'
+    154: 155,  # '\x9a'
+    155: 154,  # '\x9b'
+    156: 153,  # '\x9c'
+    157: 152,  # '\x9d'
+    158: 151,  # '\x9e'
+    159: 106,  # '\x9f'
+    160: 150,  # '\xa0'
+    161: 149,  # '¡'
+    162: 148,  # '¢'
+    163: 147,  # '£'
+    164: 146,  # '¤'
+    165: 145,  # '¥'
+    166: 144,  # '¦'
+    167: 100,  # '§'
+    168: 143,  # '¨'
+    169: 142,  # '©'
+    170: 141,  # 'ª'
+    171: 140,  # '«'
+    172: 139,  # '¬'
+    173: 138,  # '\xad'
+    174: 137,  # '®'
+    175: 136,  # '¯'
+    176: 94,  # '°'
+    177: 80,  # '±'
+    178: 93,  # '²'
+    179: 135,  # '³'
+    180: 105,  # '´'
+    181: 134,  # 'µ'
+    182: 133,  # '¶'
+    183: 63,  # '·'
+    184: 132,  # '¸'
+    185: 131,  # '¹'
+    186: 130,  # 'º'
+    187: 129,  # '»'
+    188: 128,  # '¼'
+    189: 127,  # '½'
+    190: 126,  # '¾'
+    191: 125,  # '¿'
+    192: 124,  # 'À'
+    193: 104,  # 'Á'
+    194: 73,  # 'Â'
+    195: 99,  # 'Ã'
+    196: 79,  # 'Ä'
+    197: 85,  # 'Å'
+    198: 123,  # 'Æ'
+    199: 54,  # 'Ç'
+    200: 122,  # 'È'
+    201: 98,  # 'É'
+    202: 92,  # 'Ê'
+    203: 121,  # 'Ë'
+    204: 120,  # 'Ì'
+    205: 91,  # 'Í'
+    206: 103,  # 'Î'
+    207: 119,  # 'Ï'
+    208: 68,  # 'Ğ'
+    209: 118,  # 'Ñ'
+    210: 117,  # 'Ò'
+    211: 97,  # 'Ó'
+    212: 116,  # 'Ô'
+    213: 115,  # 'Õ'
+    214: 50,  # 'Ö'
+    215: 90,  # '×'
+    216: 114,  # 'Ø'
+    217: 113,  # 'Ù'
+    218: 112,  # 'Ú'
+    219: 111,  # 'Û'
+    220: 55,  # 'Ü'
+    221: 41,  # 'İ'
+    222: 40,  # 'Ş'
+    223: 86,  # 'ß'
+    224: 89,  # 'à'
+    225: 70,  # 'á'
+    226: 59,  # 'â'
+    227: 78,  # 'ã'
+    228: 71,  # 'ä'
+    229: 82,  # 'å'
+    230: 88,  # 'æ'
+    231: 33,  # 'ç'
+    232: 77,  # 'è'
+    233: 66,  # 'é'
+    234: 84,  # 'ê'
+    235: 83,  # 'ë'
+    236: 110,  # 'ì'
+    237: 75,  # 'í'
+    238: 61,  # 'î'
+    239: 96,  # 'ï'
+    240: 30,  # 'ğ'
+    241: 67,  # 'ñ'
+    242: 109,  # 'ò'
+    243: 74,  # 'ó'
+    244: 87,  # 'ô'
+    245: 102,  # 'õ'
+    246: 34,  # 'ö'
+    247: 95,  # '÷'
+    248: 81,  # 'ø'
+    249: 108,  # 'ù'
+    250: 76,  # 'ú'
+    251: 72,  # 'û'
+    252: 17,  # 'ü'
+    253: 6,  # 'ı'
+    254: 19,  # 'ş'
+    255: 107,  # 'ÿ'
+}
+
+ISO_8859_9_TURKISH_MODEL = SingleByteCharSetModel(
+    charset_name="ISO-8859-9",
+    language="Turkish",
+    char_to_order_map=ISO_8859_9_TURKISH_CHAR_TO_ORDER,
+    language_model=TURKISH_LANG_MODEL,
+    typical_positive_ratio=0.97029,
+    keep_ascii_letters=True,
+    alphabet="ABCDEFGHIJKLMNOPRSTUVYZabcdefghijklmnoprstuvyzÂÇÎÖÛÜâçîöûüĞğİıŞş",
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/latin1prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/latin1prober.py
new file mode 100644
index 0000000..241f14a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/latin1prober.py
@@ -0,0 +1,145 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+FREQ_CAT_NUM = 4
+
+UDF = 0  # undefined
+OTH = 1  # other
+ASC = 2  # ascii capital letter
+ASS = 3  # ascii small letter
+ACV = 4  # accent capital vowel
+ACO = 5  # accent capital other
+ASV = 6  # accent small vowel
+ASO = 7  # accent small other
+CLASS_NUM = 8  # total classes
+
+# fmt: off
+Latin1_CharToClass = (
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 00 - 07
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 08 - 0F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 10 - 17
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 18 - 1F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 20 - 27
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 28 - 2F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 30 - 37
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 38 - 3F
+    OTH, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 40 - 47
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 48 - 4F
+    ASC, ASC, ASC, ASC, ASC, ASC, ASC, ASC,   # 50 - 57
+    ASC, ASC, ASC, OTH, OTH, OTH, OTH, OTH,   # 58 - 5F
+    OTH, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 60 - 67
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 68 - 6F
+    ASS, ASS, ASS, ASS, ASS, ASS, ASS, ASS,   # 70 - 77
+    ASS, ASS, ASS, OTH, OTH, OTH, OTH, OTH,   # 78 - 7F
+    OTH, UDF, OTH, ASO, OTH, OTH, OTH, OTH,   # 80 - 87
+    OTH, OTH, ACO, OTH, ACO, UDF, ACO, UDF,   # 88 - 8F
+    UDF, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # 90 - 97
+    OTH, OTH, ASO, OTH, ASO, UDF, ASO, ACO,   # 98 - 9F
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A0 - A7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # A8 - AF
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B0 - B7
+    OTH, OTH, OTH, OTH, OTH, OTH, OTH, OTH,   # B8 - BF
+    ACV, ACV, ACV, ACV, ACV, ACV, ACO, ACO,   # C0 - C7
+    ACV, ACV, ACV, ACV, ACV, ACV, ACV, ACV,   # C8 - CF
+    ACO, ACO, ACV, ACV, ACV, ACV, ACV, OTH,   # D0 - D7
+    ACV, ACV, ACV, ACV, ACV, ACO, ACO, ACO,   # D8 - DF
+    ASV, ASV, ASV, ASV, ASV, ASV, ASO, ASO,   # E0 - E7
+    ASV, ASV, ASV, ASV, ASV, ASV, ASV, ASV,   # E8 - EF
+    ASO, ASO, ASV, ASV, ASV, ASV, ASV, OTH,   # F0 - F7
+    ASV, ASV, ASV, ASV, ASV, ASO, ASO, ASO,   # F8 - FF
+)
+
+# 0 : illegal
+# 1 : very unlikely
+# 2 : normal
+# 3 : very likely
+Latin1ClassModel = (
+# UDF OTH ASC ASS ACV ACO ASV ASO
+    0,  0,  0,  0,  0,  0,  0,  0,  # UDF
+    0,  3,  3,  3,  3,  3,  3,  3,  # OTH
+    0,  3,  3,  3,  3,  3,  3,  3,  # ASC
+    0,  3,  3,  3,  1,  1,  3,  3,  # ASS
+    0,  3,  3,  3,  1,  2,  1,  2,  # ACV
+    0,  3,  3,  3,  3,  3,  3,  3,  # ACO
+    0,  3,  1,  3,  1,  1,  1,  3,  # ASV
+    0,  3,  1,  3,  1,  1,  3,  3,  # ASO
+)
+# fmt: on
+
+
+class Latin1Prober(CharSetProber):
+    def __init__(self):
+        super().__init__()
+        self._last_char_class = None
+        self._freq_counter = None
+        self.reset()
+
+    def reset(self):
+        self._last_char_class = OTH
+        self._freq_counter = [0] * FREQ_CAT_NUM
+        super().reset()
+
+    @property
+    def charset_name(self):
+        return "ISO-8859-1"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        byte_str = self.remove_xml_tags(byte_str)
+        for c in byte_str:
+            char_class = Latin1_CharToClass[c]
+            freq = Latin1ClassModel[(self._last_char_class * CLASS_NUM) + char_class]
+            if freq == 0:
+                self._state = ProbingState.NOT_ME
+                break
+            self._freq_counter[freq] += 1
+            self._last_char_class = char_class
+
+        return self.state
+
+    def get_confidence(self):
+        if self.state == ProbingState.NOT_ME:
+            return 0.01
+
+        total = sum(self._freq_counter)
+        confidence = (
+            0.0
+            if total < 0.01
+            else (self._freq_counter[3] - self._freq_counter[1] * 20.0) / total
+        )
+        confidence = max(confidence, 0.0)
+        # lower the confidence of latin1 so that other more accurate
+        # detector can take priority.
+        confidence *= 0.73
+        return confidence
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcharsetprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcharsetprober.py
new file mode 100644
index 0000000..bf96ad5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcharsetprober.py
@@ -0,0 +1,95 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .enums import MachineState, ProbingState
+
+
+class MultiByteCharSetProber(CharSetProber):
+    """
+    MultiByteCharSetProber
+    """
+
+    def __init__(self, lang_filter=None):
+        super().__init__(lang_filter=lang_filter)
+        self.distribution_analyzer = None
+        self.coding_sm = None
+        self._last_char = [0, 0]
+
+    def reset(self):
+        super().reset()
+        if self.coding_sm:
+            self.coding_sm.reset()
+        if self.distribution_analyzer:
+            self.distribution_analyzer.reset()
+        self._last_char = [0, 0]
+
+    @property
+    def charset_name(self):
+        raise NotImplementedError
+
+    @property
+    def language(self):
+        raise NotImplementedError
+
+    def feed(self, byte_str):
+        for i, byte in enumerate(byte_str):
+            coding_state = self.coding_sm.next_state(byte)
+            if coding_state == MachineState.ERROR:
+                self.logger.debug(
+                    "%s %s prober hit error at byte %s",
+                    self.charset_name,
+                    self.language,
+                    i,
+                )
+                self._state = ProbingState.NOT_ME
+                break
+            if coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            if coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.distribution_analyzer.feed(byte_str[i - 1 : i + 1], char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if self.distribution_analyzer.got_enough_data() and (
+                self.get_confidence() > self.SHORTCUT_THRESHOLD
+            ):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        return self.distribution_analyzer.get_confidence()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcsgroupprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
new file mode 100644
index 0000000..9448836
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcsgroupprober.py
@@ -0,0 +1,56 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#   Proofpoint, Inc.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .big5prober import Big5Prober
+from .charsetgroupprober import CharSetGroupProber
+from .cp949prober import CP949Prober
+from .eucjpprober import EUCJPProber
+from .euckrprober import EUCKRProber
+from .euctwprober import EUCTWProber
+from .gb2312prober import GB2312Prober
+from .johabprober import JOHABProber
+from .sjisprober import SJISProber
+from .utf8prober import UTF8Prober
+
+
+class MBCSGroupProber(CharSetGroupProber):
+    def __init__(self, lang_filter=None):
+        super().__init__(lang_filter=lang_filter)
+        self.probers = [
+            UTF8Prober(),
+            SJISProber(),
+            EUCJPProber(),
+            GB2312Prober(),
+            EUCKRProber(),
+            CP949Prober(),
+            Big5Prober(),
+            EUCTWProber(),
+            JOHABProber(),
+        ]
+        self.reset()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcssm.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcssm.py
new file mode 100644
index 0000000..d3b9c4b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/mbcssm.py
@@ -0,0 +1,660 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .enums import MachineState
+
+# BIG5
+
+# fmt: off
+BIG5_CLS = (
+    1, 1, 1, 1, 1, 1, 1, 1,  # 00 - 07    #allow 0x00 as legal value
+    1, 1, 1, 1, 1, 1, 0, 0,  # 08 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 10 - 17
+    1, 1, 1, 0, 1, 1, 1, 1,  # 18 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 27
+    1, 1, 1, 1, 1, 1, 1, 1,  # 28 - 2f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 30 - 37
+    1, 1, 1, 1, 1, 1, 1, 1,  # 38 - 3f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 40 - 47
+    2, 2, 2, 2, 2, 2, 2, 2,  # 48 - 4f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 50 - 57
+    2, 2, 2, 2, 2, 2, 2, 2,  # 58 - 5f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 60 - 67
+    2, 2, 2, 2, 2, 2, 2, 2,  # 68 - 6f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 70 - 77
+    2, 2, 2, 2, 2, 2, 2, 1,  # 78 - 7f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 80 - 87
+    4, 4, 4, 4, 4, 4, 4, 4,  # 88 - 8f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 90 - 97
+    4, 4, 4, 4, 4, 4, 4, 4,  # 98 - 9f
+    4, 3, 3, 3, 3, 3, 3, 3,  # a0 - a7
+    3, 3, 3, 3, 3, 3, 3, 3,  # a8 - af
+    3, 3, 3, 3, 3, 3, 3, 3,  # b0 - b7
+    3, 3, 3, 3, 3, 3, 3, 3,  # b8 - bf
+    3, 3, 3, 3, 3, 3, 3, 3,  # c0 - c7
+    3, 3, 3, 3, 3, 3, 3, 3,  # c8 - cf
+    3, 3, 3, 3, 3, 3, 3, 3,  # d0 - d7
+    3, 3, 3, 3, 3, 3, 3, 3,  # d8 - df
+    3, 3, 3, 3, 3, 3, 3, 3,  # e0 - e7
+    3, 3, 3, 3, 3, 3, 3, 3,  # e8 - ef
+    3, 3, 3, 3, 3, 3, 3, 3,  # f0 - f7
+    3, 3, 3, 3, 3, 3, 3, 0  # f8 - ff
+)
+
+BIG5_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,#08-0f
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START#10-17
+)
+# fmt: on
+
+BIG5_CHAR_LEN_TABLE = (0, 1, 1, 2, 0)
+
+BIG5_SM_MODEL = {
+    "class_table": BIG5_CLS,
+    "class_factor": 5,
+    "state_table": BIG5_ST,
+    "char_len_table": BIG5_CHAR_LEN_TABLE,
+    "name": "Big5",
+}
+
+# CP949
+# fmt: off
+CP949_CLS  = (
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0,  # 00 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1,  # 10 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 2f
+    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  # 30 - 3f
+    1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,  # 40 - 4f
+    4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1,  # 50 - 5f
+    1, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,  # 60 - 6f
+    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1,  # 70 - 7f
+    0, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,  # 80 - 8f
+    6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,  # 90 - 9f
+    6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8,  # a0 - af
+    7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,  # b0 - bf
+    7, 7, 7, 7, 7, 7, 9, 2, 2, 3, 2, 2, 2, 2, 2, 2,  # c0 - cf
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,  # d0 - df
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,  # e0 - ef
+    2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 0,  # f0 - ff
+)
+
+CP949_ST = (
+#cls=    0      1      2      3      4      5      6      7      8      9  # previous state =
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.START,MachineState.START,     4,     5,MachineState.ERROR,     6, # MachineState.START
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR, # MachineState.ERROR
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME, # MachineState.ITS_ME
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 3
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 4
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START, # 5
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START, # 6
+)
+# fmt: on
+
+CP949_CHAR_LEN_TABLE = (0, 1, 2, 0, 1, 1, 2, 2, 0, 2)
+
+CP949_SM_MODEL = {
+    "class_table": CP949_CLS,
+    "class_factor": 10,
+    "state_table": CP949_ST,
+    "char_len_table": CP949_CHAR_LEN_TABLE,
+    "name": "CP949",
+}
+
+# EUC-JP
+# fmt: off
+EUCJP_CLS = (
+    4, 4, 4, 4, 4, 4, 4, 4,  # 00 - 07
+    4, 4, 4, 4, 4, 4, 5, 5,  # 08 - 0f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 10 - 17
+    4, 4, 4, 5, 4, 4, 4, 4,  # 18 - 1f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 20 - 27
+    4, 4, 4, 4, 4, 4, 4, 4,  # 28 - 2f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 30 - 37
+    4, 4, 4, 4, 4, 4, 4, 4,  # 38 - 3f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 40 - 47
+    4, 4, 4, 4, 4, 4, 4, 4,  # 48 - 4f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 50 - 57
+    4, 4, 4, 4, 4, 4, 4, 4,  # 58 - 5f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 60 - 67
+    4, 4, 4, 4, 4, 4, 4, 4,  # 68 - 6f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 70 - 77
+    4, 4, 4, 4, 4, 4, 4, 4,  # 78 - 7f
+    5, 5, 5, 5, 5, 5, 5, 5,  # 80 - 87
+    5, 5, 5, 5, 5, 5, 1, 3,  # 88 - 8f
+    5, 5, 5, 5, 5, 5, 5, 5,  # 90 - 97
+    5, 5, 5, 5, 5, 5, 5, 5,  # 98 - 9f
+    5, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 2, 2, 2,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 2, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    0, 0, 0, 0, 0, 0, 0, 0,  # e0 - e7
+    0, 0, 0, 0, 0, 0, 0, 0,  # e8 - ef
+    0, 0, 0, 0, 0, 0, 0, 0,  # f0 - f7
+    0, 0, 0, 0, 0, 0, 0, 5  # f8 - ff
+)
+
+EUCJP_ST = (
+          3,     4,     3,     5,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+     MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     3,MachineState.ERROR,#18-1f
+          3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START#20-27
+)
+# fmt: on
+
+EUCJP_CHAR_LEN_TABLE = (2, 2, 2, 3, 1, 0)
+
+EUCJP_SM_MODEL = {
+    "class_table": EUCJP_CLS,
+    "class_factor": 6,
+    "state_table": EUCJP_ST,
+    "char_len_table": EUCJP_CHAR_LEN_TABLE,
+    "name": "EUC-JP",
+}
+
+# EUC-KR
+# fmt: off
+EUCKR_CLS  = (
+    1, 1, 1, 1, 1, 1, 1, 1,  # 00 - 07
+    1, 1, 1, 1, 1, 1, 0, 0,  # 08 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 10 - 17
+    1, 1, 1, 0, 1, 1, 1, 1,  # 18 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 27
+    1, 1, 1, 1, 1, 1, 1, 1,  # 28 - 2f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 30 - 37
+    1, 1, 1, 1, 1, 1, 1, 1,  # 38 - 3f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 40 - 47
+    1, 1, 1, 1, 1, 1, 1, 1,  # 48 - 4f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 50 - 57
+    1, 1, 1, 1, 1, 1, 1, 1,  # 58 - 5f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 60 - 67
+    1, 1, 1, 1, 1, 1, 1, 1,  # 68 - 6f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 70 - 77
+    1, 1, 1, 1, 1, 1, 1, 1,  # 78 - 7f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 80 - 87
+    0, 0, 0, 0, 0, 0, 0, 0,  # 88 - 8f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 90 - 97
+    0, 0, 0, 0, 0, 0, 0, 0,  # 98 - 9f
+    0, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 3, 3, 3,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 3, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    2, 2, 2, 2, 2, 2, 2, 2,  # e0 - e7
+    2, 2, 2, 2, 2, 2, 2, 2,  # e8 - ef
+    2, 2, 2, 2, 2, 2, 2, 2,  # f0 - f7
+    2, 2, 2, 2, 2, 2, 2, 0   # f8 - ff
+)
+
+EUCKR_ST = (
+    MachineState.ERROR,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #08-0f
+)
+# fmt: on
+
+EUCKR_CHAR_LEN_TABLE = (0, 1, 2, 0)
+
+EUCKR_SM_MODEL = {
+    "class_table": EUCKR_CLS,
+    "class_factor": 4,
+    "state_table": EUCKR_ST,
+    "char_len_table": EUCKR_CHAR_LEN_TABLE,
+    "name": "EUC-KR",
+}
+
+# JOHAB
+# fmt: off
+JOHAB_CLS = (
+    4,4,4,4,4,4,4,4,  # 00 - 07
+    4,4,4,4,4,4,0,0,  # 08 - 0f
+    4,4,4,4,4,4,4,4,  # 10 - 17
+    4,4,4,0,4,4,4,4,  # 18 - 1f
+    4,4,4,4,4,4,4,4,  # 20 - 27
+    4,4,4,4,4,4,4,4,  # 28 - 2f
+    4,3,3,3,3,3,3,3,  # 30 - 37
+    3,3,3,3,3,3,3,3,  # 38 - 3f
+    3,1,1,1,1,1,1,1,  # 40 - 47
+    1,1,1,1,1,1,1,1,  # 48 - 4f
+    1,1,1,1,1,1,1,1,  # 50 - 57
+    1,1,1,1,1,1,1,1,  # 58 - 5f
+    1,1,1,1,1,1,1,1,  # 60 - 67
+    1,1,1,1,1,1,1,1,  # 68 - 6f
+    1,1,1,1,1,1,1,1,  # 70 - 77
+    1,1,1,1,1,1,1,2,  # 78 - 7f
+    6,6,6,6,8,8,8,8,  # 80 - 87
+    8,8,8,8,8,8,8,8,  # 88 - 8f
+    8,7,7,7,7,7,7,7,  # 90 - 97
+    7,7,7,7,7,7,7,7,  # 98 - 9f
+    7,7,7,7,7,7,7,7,  # a0 - a7
+    7,7,7,7,7,7,7,7,  # a8 - af
+    7,7,7,7,7,7,7,7,  # b0 - b7
+    7,7,7,7,7,7,7,7,  # b8 - bf
+    7,7,7,7,7,7,7,7,  # c0 - c7
+    7,7,7,7,7,7,7,7,  # c8 - cf
+    7,7,7,7,5,5,5,5,  # d0 - d7
+    5,9,9,9,9,9,9,5,  # d8 - df
+    9,9,9,9,9,9,9,9,  # e0 - e7
+    9,9,9,9,9,9,9,9,  # e8 - ef
+    9,9,9,9,9,9,9,9,  # f0 - f7
+    9,9,5,5,5,5,5,0   # f8 - ff
+)
+
+JOHAB_ST = (
+# cls = 0                   1                   2                   3                   4                   5                   6                   7                   8                   9
+    MachineState.ERROR ,MachineState.START ,MachineState.START ,MachineState.START ,MachineState.START ,MachineState.ERROR ,MachineState.ERROR ,3                  ,3                  ,4                  ,  # MachineState.START
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,  # MachineState.ITS_ME
+    MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,MachineState.ERROR ,  # MachineState.ERROR
+    MachineState.ERROR ,MachineState.START ,MachineState.START ,MachineState.ERROR ,MachineState.ERROR ,MachineState.START ,MachineState.START ,MachineState.START ,MachineState.START ,MachineState.START ,  # 3
+    MachineState.ERROR ,MachineState.START ,MachineState.ERROR ,MachineState.START ,MachineState.ERROR ,MachineState.START ,MachineState.ERROR ,MachineState.START ,MachineState.ERROR ,MachineState.START ,  # 4
+)
+# fmt: on
+
+JOHAB_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 0, 0, 2, 2, 2)
+
+JOHAB_SM_MODEL = {
+    "class_table": JOHAB_CLS,
+    "class_factor": 10,
+    "state_table": JOHAB_ST,
+    "char_len_table": JOHAB_CHAR_LEN_TABLE,
+    "name": "Johab",
+}
+
+# EUC-TW
+# fmt: off
+EUCTW_CLS = (
+    2, 2, 2, 2, 2, 2, 2, 2,  # 00 - 07
+    2, 2, 2, 2, 2, 2, 0, 0,  # 08 - 0f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 10 - 17
+    2, 2, 2, 0, 2, 2, 2, 2,  # 18 - 1f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 20 - 27
+    2, 2, 2, 2, 2, 2, 2, 2,  # 28 - 2f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 30 - 37
+    2, 2, 2, 2, 2, 2, 2, 2,  # 38 - 3f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 40 - 47
+    2, 2, 2, 2, 2, 2, 2, 2,  # 48 - 4f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 50 - 57
+    2, 2, 2, 2, 2, 2, 2, 2,  # 58 - 5f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 60 - 67
+    2, 2, 2, 2, 2, 2, 2, 2,  # 68 - 6f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 70 - 77
+    2, 2, 2, 2, 2, 2, 2, 2,  # 78 - 7f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 80 - 87
+    0, 0, 0, 0, 0, 0, 6, 0,  # 88 - 8f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 90 - 97
+    0, 0, 0, 0, 0, 0, 0, 0,  # 98 - 9f
+    0, 3, 4, 4, 4, 4, 4, 4,  # a0 - a7
+    5, 5, 1, 1, 1, 1, 1, 1,  # a8 - af
+    1, 1, 1, 1, 1, 1, 1, 1,  # b0 - b7
+    1, 1, 1, 1, 1, 1, 1, 1,  # b8 - bf
+    1, 1, 3, 1, 3, 3, 3, 3,  # c0 - c7
+    3, 3, 3, 3, 3, 3, 3, 3,  # c8 - cf
+    3, 3, 3, 3, 3, 3, 3, 3,  # d0 - d7
+    3, 3, 3, 3, 3, 3, 3, 3,  # d8 - df
+    3, 3, 3, 3, 3, 3, 3, 3,  # e0 - e7
+    3, 3, 3, 3, 3, 3, 3, 3,  # e8 - ef
+    3, 3, 3, 3, 3, 3, 3, 3,  # f0 - f7
+    3, 3, 3, 3, 3, 3, 3, 0   # f8 - ff
+)
+
+EUCTW_ST = (
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,     3,     3,     3,     4,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.START,MachineState.ERROR,#10-17
+    MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+         5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,#20-27
+    MachineState.START,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+# fmt: on
+
+EUCTW_CHAR_LEN_TABLE = (0, 0, 1, 2, 2, 2, 3)
+
+EUCTW_SM_MODEL = {
+    "class_table": EUCTW_CLS,
+    "class_factor": 7,
+    "state_table": EUCTW_ST,
+    "char_len_table": EUCTW_CHAR_LEN_TABLE,
+    "name": "x-euc-tw",
+}
+
+# GB2312
+# fmt: off
+GB2312_CLS = (
+    1, 1, 1, 1, 1, 1, 1, 1,  # 00 - 07
+    1, 1, 1, 1, 1, 1, 0, 0,  # 08 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 10 - 17
+    1, 1, 1, 0, 1, 1, 1, 1,  # 18 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 27
+    1, 1, 1, 1, 1, 1, 1, 1,  # 28 - 2f
+    3, 3, 3, 3, 3, 3, 3, 3,  # 30 - 37
+    3, 3, 1, 1, 1, 1, 1, 1,  # 38 - 3f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 40 - 47
+    2, 2, 2, 2, 2, 2, 2, 2,  # 48 - 4f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 50 - 57
+    2, 2, 2, 2, 2, 2, 2, 2,  # 58 - 5f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 60 - 67
+    2, 2, 2, 2, 2, 2, 2, 2,  # 68 - 6f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 70 - 77
+    2, 2, 2, 2, 2, 2, 2, 4,  # 78 - 7f
+    5, 6, 6, 6, 6, 6, 6, 6,  # 80 - 87
+    6, 6, 6, 6, 6, 6, 6, 6,  # 88 - 8f
+    6, 6, 6, 6, 6, 6, 6, 6,  # 90 - 97
+    6, 6, 6, 6, 6, 6, 6, 6,  # 98 - 9f
+    6, 6, 6, 6, 6, 6, 6, 6,  # a0 - a7
+    6, 6, 6, 6, 6, 6, 6, 6,  # a8 - af
+    6, 6, 6, 6, 6, 6, 6, 6,  # b0 - b7
+    6, 6, 6, 6, 6, 6, 6, 6,  # b8 - bf
+    6, 6, 6, 6, 6, 6, 6, 6,  # c0 - c7
+    6, 6, 6, 6, 6, 6, 6, 6,  # c8 - cf
+    6, 6, 6, 6, 6, 6, 6, 6,  # d0 - d7
+    6, 6, 6, 6, 6, 6, 6, 6,  # d8 - df
+    6, 6, 6, 6, 6, 6, 6, 6,  # e0 - e7
+    6, 6, 6, 6, 6, 6, 6, 6,  # e8 - ef
+    6, 6, 6, 6, 6, 6, 6, 6,  # f0 - f7
+    6, 6, 6, 6, 6, 6, 6, 0   # f8 - ff
+)
+
+GB2312_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,     3,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,#10-17
+         4,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ERROR,MachineState.ERROR,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#20-27
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.START #28-2f
+)
+# fmt: on
+
+# To be accurate, the length of class 6 can be either 2 or 4.
+# But it is not necessary to discriminate between the two since
+# it is used for frequency analysis only, and we are validating
+# each code range there as well. So it is safe to set it to be
+# 2 here.
+GB2312_CHAR_LEN_TABLE = (0, 1, 1, 1, 1, 1, 2)
+
+GB2312_SM_MODEL = {
+    "class_table": GB2312_CLS,
+    "class_factor": 7,
+    "state_table": GB2312_ST,
+    "char_len_table": GB2312_CHAR_LEN_TABLE,
+    "name": "GB2312",
+}
+
+# Shift_JIS
+# fmt: off
+SJIS_CLS = (
+    1, 1, 1, 1, 1, 1, 1, 1,  # 00 - 07
+    1, 1, 1, 1, 1, 1, 0, 0,  # 08 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 10 - 17
+    1, 1, 1, 0, 1, 1, 1, 1,  # 18 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 27
+    1, 1, 1, 1, 1, 1, 1, 1,  # 28 - 2f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 30 - 37
+    1, 1, 1, 1, 1, 1, 1, 1,  # 38 - 3f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 40 - 47
+    2, 2, 2, 2, 2, 2, 2, 2,  # 48 - 4f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 50 - 57
+    2, 2, 2, 2, 2, 2, 2, 2,  # 58 - 5f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 60 - 67
+    2, 2, 2, 2, 2, 2, 2, 2,  # 68 - 6f
+    2, 2, 2, 2, 2, 2, 2, 2,  # 70 - 77
+    2, 2, 2, 2, 2, 2, 2, 1,  # 78 - 7f
+    3, 3, 3, 3, 3, 2, 2, 3,  # 80 - 87
+    3, 3, 3, 3, 3, 3, 3, 3,  # 88 - 8f
+    3, 3, 3, 3, 3, 3, 3, 3,  # 90 - 97
+    3, 3, 3, 3, 3, 3, 3, 3,  # 98 - 9f
+    #0xa0 is illegal in sjis encoding, but some pages does
+    #contain such byte. We need to be more error forgiven.
+    2, 2, 2, 2, 2, 2, 2, 2,  # a0 - a7
+    2, 2, 2, 2, 2, 2, 2, 2,  # a8 - af
+    2, 2, 2, 2, 2, 2, 2, 2,  # b0 - b7
+    2, 2, 2, 2, 2, 2, 2, 2,  # b8 - bf
+    2, 2, 2, 2, 2, 2, 2, 2,  # c0 - c7
+    2, 2, 2, 2, 2, 2, 2, 2,  # c8 - cf
+    2, 2, 2, 2, 2, 2, 2, 2,  # d0 - d7
+    2, 2, 2, 2, 2, 2, 2, 2,  # d8 - df
+    3, 3, 3, 3, 3, 3, 3, 3,  # e0 - e7
+    3, 3, 3, 3, 3, 4, 4, 4,  # e8 - ef
+    3, 3, 3, 3, 3, 3, 3, 3,  # f0 - f7
+    3, 3, 3, 3, 3, 0, 0, 0,  # f8 - ff
+)
+
+SJIS_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.START,     3,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#00-07
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START #10-17
+)
+# fmt: on
+
+SJIS_CHAR_LEN_TABLE = (0, 1, 1, 2, 0, 0)
+
+SJIS_SM_MODEL = {
+    "class_table": SJIS_CLS,
+    "class_factor": 6,
+    "state_table": SJIS_ST,
+    "char_len_table": SJIS_CHAR_LEN_TABLE,
+    "name": "Shift_JIS",
+}
+
+# UCS2-BE
+# fmt: off
+UCS2BE_CLS = (
+    0, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 1, 0, 0, 2, 0, 0,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 3, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 20 - 27
+    0, 3, 3, 3, 3, 3, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 40 - 47
+    0, 0, 0, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 0, 0, 0, 0, 0,  # 78 - 7f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 80 - 87
+    0, 0, 0, 0, 0, 0, 0, 0,  # 88 - 8f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 90 - 97
+    0, 0, 0, 0, 0, 0, 0, 0,  # 98 - 9f
+    0, 0, 0, 0, 0, 0, 0, 0,  # a0 - a7
+    0, 0, 0, 0, 0, 0, 0, 0,  # a8 - af
+    0, 0, 0, 0, 0, 0, 0, 0,  # b0 - b7
+    0, 0, 0, 0, 0, 0, 0, 0,  # b8 - bf
+    0, 0, 0, 0, 0, 0, 0, 0,  # c0 - c7
+    0, 0, 0, 0, 0, 0, 0, 0,  # c8 - cf
+    0, 0, 0, 0, 0, 0, 0, 0,  # d0 - d7
+    0, 0, 0, 0, 0, 0, 0, 0,  # d8 - df
+    0, 0, 0, 0, 0, 0, 0, 0,  # e0 - e7
+    0, 0, 0, 0, 0, 0, 0, 0,  # e8 - ef
+    0, 0, 0, 0, 0, 0, 0, 0,  # f0 - f7
+    0, 0, 0, 0, 0, 0, 4, 5   # f8 - ff
+)
+
+UCS2BE_ST  = (
+          5,     7,     7,MachineState.ERROR,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,#10-17
+          6,     6,     6,     6,     6,MachineState.ITS_ME,     6,     6,#18-1f
+          6,     6,     6,     6,     5,     7,     7,MachineState.ERROR,#20-27
+          5,     8,     6,     6,MachineState.ERROR,     6,     6,     6,#28-2f
+          6,     6,     6,     6,MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+# fmt: on
+
+UCS2BE_CHAR_LEN_TABLE = (2, 2, 2, 0, 2, 2)
+
+UCS2BE_SM_MODEL = {
+    "class_table": UCS2BE_CLS,
+    "class_factor": 6,
+    "state_table": UCS2BE_ST,
+    "char_len_table": UCS2BE_CHAR_LEN_TABLE,
+    "name": "UTF-16BE",
+}
+
+# UCS2-LE
+# fmt: off
+UCS2LE_CLS = (
+    0, 0, 0, 0, 0, 0, 0, 0,  # 00 - 07
+    0, 0, 1, 0, 0, 2, 0, 0,  # 08 - 0f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 10 - 17
+    0, 0, 0, 3, 0, 0, 0, 0,  # 18 - 1f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 20 - 27
+    0, 3, 3, 3, 3, 3, 0, 0,  # 28 - 2f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 30 - 37
+    0, 0, 0, 0, 0, 0, 0, 0,  # 38 - 3f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 40 - 47
+    0, 0, 0, 0, 0, 0, 0, 0,  # 48 - 4f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 50 - 57
+    0, 0, 0, 0, 0, 0, 0, 0,  # 58 - 5f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 60 - 67
+    0, 0, 0, 0, 0, 0, 0, 0,  # 68 - 6f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 70 - 77
+    0, 0, 0, 0, 0, 0, 0, 0,  # 78 - 7f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 80 - 87
+    0, 0, 0, 0, 0, 0, 0, 0,  # 88 - 8f
+    0, 0, 0, 0, 0, 0, 0, 0,  # 90 - 97
+    0, 0, 0, 0, 0, 0, 0, 0,  # 98 - 9f
+    0, 0, 0, 0, 0, 0, 0, 0,  # a0 - a7
+    0, 0, 0, 0, 0, 0, 0, 0,  # a8 - af
+    0, 0, 0, 0, 0, 0, 0, 0,  # b0 - b7
+    0, 0, 0, 0, 0, 0, 0, 0,  # b8 - bf
+    0, 0, 0, 0, 0, 0, 0, 0,  # c0 - c7
+    0, 0, 0, 0, 0, 0, 0, 0,  # c8 - cf
+    0, 0, 0, 0, 0, 0, 0, 0,  # d0 - d7
+    0, 0, 0, 0, 0, 0, 0, 0,  # d8 - df
+    0, 0, 0, 0, 0, 0, 0, 0,  # e0 - e7
+    0, 0, 0, 0, 0, 0, 0, 0,  # e8 - ef
+    0, 0, 0, 0, 0, 0, 0, 0,  # f0 - f7
+    0, 0, 0, 0, 0, 0, 4, 5   # f8 - ff
+)
+
+UCS2LE_ST = (
+          6,     6,     7,     6,     4,     3,MachineState.ERROR,MachineState.ERROR,#00-07
+     MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#08-0f
+     MachineState.ITS_ME,MachineState.ITS_ME,     5,     5,     5,MachineState.ERROR,MachineState.ITS_ME,MachineState.ERROR,#10-17
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,     6,     6,#18-1f
+          7,     6,     8,     8,     5,     5,     5,MachineState.ERROR,#20-27
+          5,     5,     5,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,#28-2f
+          5,     5,     5,MachineState.ERROR,     5,MachineState.ERROR,MachineState.START,MachineState.START #30-37
+)
+# fmt: on
+
+UCS2LE_CHAR_LEN_TABLE = (2, 2, 2, 2, 2, 2)
+
+UCS2LE_SM_MODEL = {
+    "class_table": UCS2LE_CLS,
+    "class_factor": 6,
+    "state_table": UCS2LE_ST,
+    "char_len_table": UCS2LE_CHAR_LEN_TABLE,
+    "name": "UTF-16LE",
+}
+
+# UTF-8
+# fmt: off
+UTF8_CLS = (
+    1, 1, 1, 1, 1, 1, 1, 1,  # 00 - 07  #allow 0x00 as a legal value
+    1, 1, 1, 1, 1, 1, 0, 0,  # 08 - 0f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 10 - 17
+    1, 1, 1, 0, 1, 1, 1, 1,  # 18 - 1f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 20 - 27
+    1, 1, 1, 1, 1, 1, 1, 1,  # 28 - 2f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 30 - 37
+    1, 1, 1, 1, 1, 1, 1, 1,  # 38 - 3f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 40 - 47
+    1, 1, 1, 1, 1, 1, 1, 1,  # 48 - 4f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 50 - 57
+    1, 1, 1, 1, 1, 1, 1, 1,  # 58 - 5f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 60 - 67
+    1, 1, 1, 1, 1, 1, 1, 1,  # 68 - 6f
+    1, 1, 1, 1, 1, 1, 1, 1,  # 70 - 77
+    1, 1, 1, 1, 1, 1, 1, 1,  # 78 - 7f
+    2, 2, 2, 2, 3, 3, 3, 3,  # 80 - 87
+    4, 4, 4, 4, 4, 4, 4, 4,  # 88 - 8f
+    4, 4, 4, 4, 4, 4, 4, 4,  # 90 - 97
+    4, 4, 4, 4, 4, 4, 4, 4,  # 98 - 9f
+    5, 5, 5, 5, 5, 5, 5, 5,  # a0 - a7
+    5, 5, 5, 5, 5, 5, 5, 5,  # a8 - af
+    5, 5, 5, 5, 5, 5, 5, 5,  # b0 - b7
+    5, 5, 5, 5, 5, 5, 5, 5,  # b8 - bf
+    0, 0, 6, 6, 6, 6, 6, 6,  # c0 - c7
+    6, 6, 6, 6, 6, 6, 6, 6,  # c8 - cf
+    6, 6, 6, 6, 6, 6, 6, 6,  # d0 - d7
+    6, 6, 6, 6, 6, 6, 6, 6,  # d8 - df
+    7, 8, 8, 8, 8, 8, 8, 8,  # e0 - e7
+    8, 8, 8, 8, 8, 9, 8, 8,  # e8 - ef
+    10, 11, 11, 11, 11, 11, 11, 11,  # f0 - f7
+    12, 13, 13, 13, 14, 15, 0, 0    # f8 - ff
+)
+
+UTF8_ST = (
+    MachineState.ERROR,MachineState.START,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     12,   10,#00-07
+         9,     11,     8,     7,     6,     5,     4,    3,#08-0f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#10-17
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#18-1f
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#20-27
+    MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,MachineState.ITS_ME,#28-2f
+    MachineState.ERROR,MachineState.ERROR,     5,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#30-37
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#38-3f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     5,     5,     5,MachineState.ERROR,MachineState.ERROR,#40-47
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#48-4f
+    MachineState.ERROR,MachineState.ERROR,     7,     7,     7,     7,MachineState.ERROR,MachineState.ERROR,#50-57
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#58-5f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     7,     7,MachineState.ERROR,MachineState.ERROR,#60-67
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#68-6f
+    MachineState.ERROR,MachineState.ERROR,     9,     9,     9,     9,MachineState.ERROR,MachineState.ERROR,#70-77
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#78-7f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,     9,MachineState.ERROR,MachineState.ERROR,#80-87
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#88-8f
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,#90-97
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#98-9f
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,    12,MachineState.ERROR,MachineState.ERROR,#a0-a7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#a8-af
+    MachineState.ERROR,MachineState.ERROR,    12,    12,    12,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b0-b7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,#b8-bf
+    MachineState.ERROR,MachineState.ERROR,MachineState.START,MachineState.START,MachineState.START,MachineState.START,MachineState.ERROR,MachineState.ERROR,#c0-c7
+    MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR,MachineState.ERROR #c8-cf
+)
+# fmt: on
+
+UTF8_CHAR_LEN_TABLE = (0, 1, 0, 0, 0, 0, 2, 3, 3, 3, 4, 4, 5, 5, 6, 6)
+
+UTF8_SM_MODEL = {
+    "class_table": UTF8_CLS,
+    "class_factor": 16,
+    "state_table": UTF8_ST,
+    "char_len_table": UTF8_CHAR_LEN_TABLE,
+    "name": "UTF-8",
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..0d4d036
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/languages.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/languages.cpython-39.pyc
new file mode 100644
index 0000000..8086ebd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/__pycache__/languages.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/languages.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/languages.py
new file mode 100644
index 0000000..1d37884
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/metadata/languages.py
@@ -0,0 +1,351 @@
+"""
+Metadata about languages used by our model training code for our
+SingleByteCharSetProbers.  Could be used for other things in the future.
+
+This code is based on the language metadata from the uchardet project.
+"""
+
+from string import ascii_letters
+
+# TODO: Add Ukrainian (KOI8-U)
+
+
+class Language:
+    """Metadata about a language useful for training models
+
+    :ivar name: The human name for the language, in English.
+    :type name: str
+    :ivar iso_code: 2-letter ISO 639-1 if possible, 3-letter ISO code otherwise,
+                    or use another catalog as a last resort.
+    :type iso_code: str
+    :ivar use_ascii: Whether or not ASCII letters should be included in trained
+                     models.
+    :type use_ascii: bool
+    :ivar charsets: The charsets we want to support and create data for.
+    :type charsets: list of str
+    :ivar alphabet: The characters in the language's alphabet. If `use_ascii` is
+                    `True`, you only need to add those not in the ASCII set.
+    :type alphabet: str
+    :ivar wiki_start_pages: The Wikipedia pages to start from if we're crawling
+                            Wikipedia for training data.
+    :type wiki_start_pages: list of str
+    """
+
+    def __init__(
+        self,
+        name=None,
+        iso_code=None,
+        use_ascii=True,
+        charsets=None,
+        alphabet=None,
+        wiki_start_pages=None,
+    ):
+        super().__init__()
+        self.name = name
+        self.iso_code = iso_code
+        self.use_ascii = use_ascii
+        self.charsets = charsets
+        if self.use_ascii:
+            if alphabet:
+                alphabet += ascii_letters
+            else:
+                alphabet = ascii_letters
+        elif not alphabet:
+            raise ValueError("Must supply alphabet if use_ascii is False")
+        self.alphabet = "".join(sorted(set(alphabet))) if alphabet else None
+        self.wiki_start_pages = wiki_start_pages
+
+    def __repr__(self):
+        param_str = ", ".join(
+            f"{k}={v!r}" for k, v in self.__dict__.items() if not k.startswith("_")
+        )
+        return f"{self.__class__.__name__}({param_str})"
+
+
+LANGUAGES = {
+    "Arabic": Language(
+        name="Arabic",
+        iso_code="ar",
+        use_ascii=False,
+        # We only support encodings that use isolated
+        # forms, because the current recommendation is
+        # that the rendering system handles presentation
+        # forms. This means we purposefully skip IBM864.
+        charsets=["ISO-8859-6", "WINDOWS-1256", "CP720", "CP864"],
+        alphabet="ءآأؤإئابةتثجحخدذرزسشصضطظعغػؼؽؾؿـفقكلمنهوىيًٌٍَُِّ",
+        wiki_start_pages=["الصفحة_الرئيسية"],
+    ),
+    "Belarusian": Language(
+        name="Belarusian",
+        iso_code="be",
+        use_ascii=False,
+        charsets=["ISO-8859-5", "WINDOWS-1251", "IBM866", "MacCyrillic"],
+        alphabet="АБВГДЕЁЖЗІЙКЛМНОПРСТУЎФХЦЧШЫЬЭЮЯабвгдеёжзійклмнопрстуўфхцчшыьэюяʼ",
+        wiki_start_pages=["Галоўная_старонка"],
+    ),
+    "Bulgarian": Language(
+        name="Bulgarian",
+        iso_code="bg",
+        use_ascii=False,
+        charsets=["ISO-8859-5", "WINDOWS-1251", "IBM855"],
+        alphabet="АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЬЮЯабвгдежзийклмнопрстуфхцчшщъьюя",
+        wiki_start_pages=["Начална_страница"],
+    ),
+    "Czech": Language(
+        name="Czech",
+        iso_code="cz",
+        use_ascii=True,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="áčďéěíňóřšťúůýžÁČĎÉĚÍŇÓŘŠŤÚŮÝŽ",
+        wiki_start_pages=["Hlavní_strana"],
+    ),
+    "Danish": Language(
+        name="Danish",
+        iso_code="da",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="æøåÆØÅ",
+        wiki_start_pages=["Forside"],
+    ),
+    "German": Language(
+        name="German",
+        iso_code="de",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "WINDOWS-1252"],
+        alphabet="äöüßÄÖÜ",
+        wiki_start_pages=["Wikipedia:Hauptseite"],
+    ),
+    "Greek": Language(
+        name="Greek",
+        iso_code="el",
+        use_ascii=False,
+        charsets=["ISO-8859-7", "WINDOWS-1253"],
+        alphabet="αβγδεζηθικλμνξοπρσςτυφχψωάέήίόύώΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΣΤΥΦΧΨΩΆΈΉΊΌΎΏ",
+        wiki_start_pages=["Πύλη:Κύρια"],
+    ),
+    "English": Language(
+        name="English",
+        iso_code="en",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "WINDOWS-1252"],
+        wiki_start_pages=["Main_Page"],
+    ),
+    "Esperanto": Language(
+        name="Esperanto",
+        iso_code="eo",
+        # Q, W, X, and Y not used at all
+        use_ascii=False,
+        charsets=["ISO-8859-3"],
+        alphabet="abcĉdefgĝhĥijĵklmnoprsŝtuŭvzABCĈDEFGĜHĤIJĴKLMNOPRSŜTUŬVZ",
+        wiki_start_pages=["Vikipedio:Ĉefpaĝo"],
+    ),
+    "Spanish": Language(
+        name="Spanish",
+        iso_code="es",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="ñáéíóúüÑÁÉÍÓÚÜ",
+        wiki_start_pages=["Wikipedia:Portada"],
+    ),
+    "Estonian": Language(
+        name="Estonian",
+        iso_code="et",
+        use_ascii=False,
+        charsets=["ISO-8859-4", "ISO-8859-13", "WINDOWS-1257"],
+        # C, F, Š, Q, W, X, Y, Z, Ž are only for
+        # loanwords
+        alphabet="ABDEGHIJKLMNOPRSTUVÕÄÖÜabdeghijklmnoprstuvõäöü",
+        wiki_start_pages=["Esileht"],
+    ),
+    "Finnish": Language(
+        name="Finnish",
+        iso_code="fi",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="ÅÄÖŠŽåäöšž",
+        wiki_start_pages=["Wikipedia:Etusivu"],
+    ),
+    "French": Language(
+        name="French",
+        iso_code="fr",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="œàâçèéîïùûêŒÀÂÇÈÉÎÏÙÛÊ",
+        wiki_start_pages=["Wikipédia:Accueil_principal", "Bœuf (animal)"],
+    ),
+    "Hebrew": Language(
+        name="Hebrew",
+        iso_code="he",
+        use_ascii=False,
+        charsets=["ISO-8859-8", "WINDOWS-1255"],
+        alphabet="אבגדהוזחטיךכלםמןנסעףפץצקרשתװױײ",
+        wiki_start_pages=["עמוד_ראשי"],
+    ),
+    "Croatian": Language(
+        name="Croatian",
+        iso_code="hr",
+        # Q, W, X, Y are only used for foreign words.
+        use_ascii=False,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="abcčćdđefghijklmnoprsštuvzžABCČĆDĐEFGHIJKLMNOPRSŠTUVZŽ",
+        wiki_start_pages=["Glavna_stranica"],
+    ),
+    "Hungarian": Language(
+        name="Hungarian",
+        iso_code="hu",
+        # Q, W, X, Y are only used for foreign words.
+        use_ascii=False,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="abcdefghijklmnoprstuvzáéíóöőúüűABCDEFGHIJKLMNOPRSTUVZÁÉÍÓÖŐÚÜŰ",
+        wiki_start_pages=["Kezdőlap"],
+    ),
+    "Italian": Language(
+        name="Italian",
+        iso_code="it",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="ÀÈÉÌÒÓÙàèéìòóù",
+        wiki_start_pages=["Pagina_principale"],
+    ),
+    "Lithuanian": Language(
+        name="Lithuanian",
+        iso_code="lt",
+        use_ascii=False,
+        charsets=["ISO-8859-13", "WINDOWS-1257", "ISO-8859-4"],
+        # Q, W, and X not used at all
+        alphabet="AĄBCČDEĘĖFGHIĮYJKLMNOPRSŠTUŲŪVZŽaąbcčdeęėfghiįyjklmnoprsštuųūvzž",
+        wiki_start_pages=["Pagrindinis_puslapis"],
+    ),
+    "Latvian": Language(
+        name="Latvian",
+        iso_code="lv",
+        use_ascii=False,
+        charsets=["ISO-8859-13", "WINDOWS-1257", "ISO-8859-4"],
+        # Q, W, X, Y are only for loanwords
+        alphabet="AĀBCČDEĒFGĢHIĪJKĶLĻMNŅOPRSŠTUŪVZŽaābcčdeēfgģhiījkķlļmnņoprsštuūvzž",
+        wiki_start_pages=["Sākumlapa"],
+    ),
+    "Macedonian": Language(
+        name="Macedonian",
+        iso_code="mk",
+        use_ascii=False,
+        charsets=["ISO-8859-5", "WINDOWS-1251", "MacCyrillic", "IBM855"],
+        alphabet="АБВГДЃЕЖЗЅИЈКЛЉМНЊОПРСТЌУФХЦЧЏШабвгдѓежзѕијклљмнњопрстќуфхцчџш",
+        wiki_start_pages=["Главна_страница"],
+    ),
+    "Dutch": Language(
+        name="Dutch",
+        iso_code="nl",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "WINDOWS-1252"],
+        wiki_start_pages=["Hoofdpagina"],
+    ),
+    "Polish": Language(
+        name="Polish",
+        iso_code="pl",
+        # Q and X are only used for foreign words.
+        use_ascii=False,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="AĄBCĆDEĘFGHIJKLŁMNŃOÓPRSŚTUWYZŹŻaąbcćdeęfghijklłmnńoóprsśtuwyzźż",
+        wiki_start_pages=["Wikipedia:Strona_główna"],
+    ),
+    "Portuguese": Language(
+        name="Portuguese",
+        iso_code="pt",
+        use_ascii=True,
+        charsets=["ISO-8859-1", "ISO-8859-15", "WINDOWS-1252"],
+        alphabet="ÁÂÃÀÇÉÊÍÓÔÕÚáâãàçéêíóôõú",
+        wiki_start_pages=["Wikipédia:Página_principal"],
+    ),
+    "Romanian": Language(
+        name="Romanian",
+        iso_code="ro",
+        use_ascii=True,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="ăâîșțĂÂÎȘȚ",
+        wiki_start_pages=["Pagina_principală"],
+    ),
+    "Russian": Language(
+        name="Russian",
+        iso_code="ru",
+        use_ascii=False,
+        charsets=[
+            "ISO-8859-5",
+            "WINDOWS-1251",
+            "KOI8-R",
+            "MacCyrillic",
+            "IBM866",
+            "IBM855",
+        ],
+        alphabet="абвгдеёжзийклмнопрстуфхцчшщъыьэюяАБВГДЕЁЖЗИЙКЛМНОПРСТУФХЦЧШЩЪЫЬЭЮЯ",
+        wiki_start_pages=["Заглавная_страница"],
+    ),
+    "Slovak": Language(
+        name="Slovak",
+        iso_code="sk",
+        use_ascii=True,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="áäčďéíĺľňóôŕšťúýžÁÄČĎÉÍĹĽŇÓÔŔŠŤÚÝŽ",
+        wiki_start_pages=["Hlavná_stránka"],
+    ),
+    "Slovene": Language(
+        name="Slovene",
+        iso_code="sl",
+        # Q, W, X, Y are only used for foreign words.
+        use_ascii=False,
+        charsets=["ISO-8859-2", "WINDOWS-1250"],
+        alphabet="abcčdefghijklmnoprsštuvzžABCČDEFGHIJKLMNOPRSŠTUVZŽ",
+        wiki_start_pages=["Glavna_stran"],
+    ),
+    # Serbian can be written in both Latin and Cyrillic, but there's no
+    # simple way to get the Latin alphabet pages from Wikipedia through
+    # the API, so for now we just support Cyrillic.
+    "Serbian": Language(
+        name="Serbian",
+        iso_code="sr",
+        alphabet="АБВГДЂЕЖЗИЈКЛЉМНЊОПРСТЋУФХЦЧЏШабвгдђежзијклљмнњопрстћуфхцчџш",
+        charsets=["ISO-8859-5", "WINDOWS-1251", "MacCyrillic", "IBM855"],
+        wiki_start_pages=["Главна_страна"],
+    ),
+    "Thai": Language(
+        name="Thai",
+        iso_code="th",
+        use_ascii=False,
+        charsets=["ISO-8859-11", "TIS-620", "CP874"],
+        alphabet="กขฃคฅฆงจฉชซฌญฎฏฐฑฒณดตถทธนบปผฝพฟภมยรฤลฦวศษสหฬอฮฯะัาำิีึืฺุู฿เแโใไๅๆ็่้๊๋์ํ๎๏๐๑๒๓๔๕๖๗๘๙๚๛",
+        wiki_start_pages=["หน้าหลัก"],
+    ),
+    "Turkish": Language(
+        name="Turkish",
+        iso_code="tr",
+        # Q, W, and X are not used by Turkish
+        use_ascii=False,
+        charsets=["ISO-8859-3", "ISO-8859-9", "WINDOWS-1254"],
+        alphabet="abcçdefgğhıijklmnoöprsştuüvyzâîûABCÇDEFGĞHIİJKLMNOÖPRSŞTUÜVYZÂÎÛ",
+        wiki_start_pages=["Ana_Sayfa"],
+    ),
+    "Vietnamese": Language(
+        name="Vietnamese",
+        iso_code="vi",
+        use_ascii=False,
+        # Windows-1258 is the only common 8-bit
+        # Vietnamese encoding supported by Python.
+        # From Wikipedia:
+        # For systems that lack support for Unicode,
+        # dozens of 8-bit Vietnamese code pages are
+        # available.[1] The most common are VISCII
+        # (TCVN 5712:1993), VPS, and Windows-1258.[3]
+        # Where ASCII is required, such as when
+        # ensuring readability in plain text e-mail,
+        # Vietnamese letters are often encoded
+        # according to Vietnamese Quoted-Readable
+        # (VIQR) or VSCII Mnemonic (VSCII-MNEM),[4]
+        # though usage of either variable-width
+        # scheme has declined dramatically following
+        # the adoption of Unicode on the World Wide
+        # Web.
+        charsets=["WINDOWS-1258"],
+        alphabet="aăâbcdđeêghiklmnoôơpqrstuưvxyAĂÂBCDĐEÊGHIKLMNOÔƠPQRSTUƯVXY",
+        wiki_start_pages=["Chữ_Quốc_ngữ"],
+    ),
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcharsetprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcharsetprober.py
new file mode 100644
index 0000000..31d70e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcharsetprober.py
@@ -0,0 +1,160 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from collections import namedtuple
+
+from .charsetprober import CharSetProber
+from .enums import CharacterCategory, ProbingState, SequenceLikelihood
+
+SingleByteCharSetModel = namedtuple(
+    "SingleByteCharSetModel",
+    [
+        "charset_name",
+        "language",
+        "char_to_order_map",
+        "language_model",
+        "typical_positive_ratio",
+        "keep_ascii_letters",
+        "alphabet",
+    ],
+)
+
+
+class SingleByteCharSetProber(CharSetProber):
+    SAMPLE_SIZE = 64
+    SB_ENOUGH_REL_THRESHOLD = 1024  # 0.25 * SAMPLE_SIZE^2
+    POSITIVE_SHORTCUT_THRESHOLD = 0.95
+    NEGATIVE_SHORTCUT_THRESHOLD = 0.05
+
+    def __init__(self, model, is_reversed=False, name_prober=None):
+        super().__init__()
+        self._model = model
+        # TRUE if we need to reverse every pair in the model lookup
+        self._reversed = is_reversed
+        # Optional auxiliary prober for name decision
+        self._name_prober = name_prober
+        self._last_order = None
+        self._seq_counters = None
+        self._total_seqs = None
+        self._total_char = None
+        self._control_char = None
+        self._freq_char = None
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        # char order of last character
+        self._last_order = 255
+        self._seq_counters = [0] * SequenceLikelihood.get_num_categories()
+        self._total_seqs = 0
+        self._total_char = 0
+        self._control_char = 0
+        # characters that fall in our sampling range
+        self._freq_char = 0
+
+    @property
+    def charset_name(self):
+        if self._name_prober:
+            return self._name_prober.charset_name
+        return self._model.charset_name
+
+    @property
+    def language(self):
+        if self._name_prober:
+            return self._name_prober.language
+        return self._model.language
+
+    def feed(self, byte_str):
+        # TODO: Make filter_international_words keep things in self.alphabet
+        if not self._model.keep_ascii_letters:
+            byte_str = self.filter_international_words(byte_str)
+        else:
+            byte_str = self.remove_xml_tags(byte_str)
+        if not byte_str:
+            return self.state
+        char_to_order_map = self._model.char_to_order_map
+        language_model = self._model.language_model
+        for char in byte_str:
+            order = char_to_order_map.get(char, CharacterCategory.UNDEFINED)
+            # XXX: This was SYMBOL_CAT_ORDER before, with a value of 250, but
+            #      CharacterCategory.SYMBOL is actually 253, so we use CONTROL
+            #      to make it closer to the original intent. The only difference
+            #      is whether or not we count digits and control characters for
+            #      _total_char purposes.
+            if order < CharacterCategory.CONTROL:
+                self._total_char += 1
+            if order < self.SAMPLE_SIZE:
+                self._freq_char += 1
+                if self._last_order < self.SAMPLE_SIZE:
+                    self._total_seqs += 1
+                    if not self._reversed:
+                        lm_cat = language_model[self._last_order][order]
+                    else:
+                        lm_cat = language_model[order][self._last_order]
+                    self._seq_counters[lm_cat] += 1
+            self._last_order = order
+
+        charset_name = self._model.charset_name
+        if self.state == ProbingState.DETECTING:
+            if self._total_seqs > self.SB_ENOUGH_REL_THRESHOLD:
+                confidence = self.get_confidence()
+                if confidence > self.POSITIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug(
+                        "%s confidence = %s, we have a winner", charset_name, confidence
+                    )
+                    self._state = ProbingState.FOUND_IT
+                elif confidence < self.NEGATIVE_SHORTCUT_THRESHOLD:
+                    self.logger.debug(
+                        "%s confidence = %s, below negative shortcut threshold %s",
+                        charset_name,
+                        confidence,
+                        self.NEGATIVE_SHORTCUT_THRESHOLD,
+                    )
+                    self._state = ProbingState.NOT_ME
+
+        return self.state
+
+    def get_confidence(self):
+        r = 0.01
+        if self._total_seqs > 0:
+            r = (
+                (
+                    self._seq_counters[SequenceLikelihood.POSITIVE]
+                    + 0.25 * self._seq_counters[SequenceLikelihood.LIKELY]
+                )
+                / self._total_seqs
+                / self._model.typical_positive_ratio
+            )
+            # The more control characters (proportionnaly to the size
+            # of the text), the less confident we become in the current
+            # charset.
+            r = r * (self._total_char - self._control_char) / self._total_char
+            r = r * self._freq_char / self._total_char
+            if r >= 1.0:
+                r = 0.99
+        return r
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcsgroupprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
new file mode 100644
index 0000000..cad001c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sbcsgroupprober.py
@@ -0,0 +1,88 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetgroupprober import CharSetGroupProber
+from .hebrewprober import HebrewProber
+from .langbulgarianmodel import ISO_8859_5_BULGARIAN_MODEL, WINDOWS_1251_BULGARIAN_MODEL
+from .langgreekmodel import ISO_8859_7_GREEK_MODEL, WINDOWS_1253_GREEK_MODEL
+from .langhebrewmodel import WINDOWS_1255_HEBREW_MODEL
+
+# from .langhungarianmodel import (ISO_8859_2_HUNGARIAN_MODEL,
+#                                  WINDOWS_1250_HUNGARIAN_MODEL)
+from .langrussianmodel import (
+    IBM855_RUSSIAN_MODEL,
+    IBM866_RUSSIAN_MODEL,
+    ISO_8859_5_RUSSIAN_MODEL,
+    KOI8_R_RUSSIAN_MODEL,
+    MACCYRILLIC_RUSSIAN_MODEL,
+    WINDOWS_1251_RUSSIAN_MODEL,
+)
+from .langthaimodel import TIS_620_THAI_MODEL
+from .langturkishmodel import ISO_8859_9_TURKISH_MODEL
+from .sbcharsetprober import SingleByteCharSetProber
+
+
+class SBCSGroupProber(CharSetGroupProber):
+    def __init__(self):
+        super().__init__()
+        hebrew_prober = HebrewProber()
+        logical_hebrew_prober = SingleByteCharSetProber(
+            WINDOWS_1255_HEBREW_MODEL, is_reversed=False, name_prober=hebrew_prober
+        )
+        # TODO: See if using ISO-8859-8 Hebrew model works better here, since
+        #       it's actually the visual one
+        visual_hebrew_prober = SingleByteCharSetProber(
+            WINDOWS_1255_HEBREW_MODEL, is_reversed=True, name_prober=hebrew_prober
+        )
+        hebrew_prober.set_model_probers(logical_hebrew_prober, visual_hebrew_prober)
+        # TODO: ORDER MATTERS HERE. I changed the order vs what was in master
+        #       and several tests failed that did not before. Some thought
+        #       should be put into the ordering, and we should consider making
+        #       order not matter here, because that is very counter-intuitive.
+        self.probers = [
+            SingleByteCharSetProber(WINDOWS_1251_RUSSIAN_MODEL),
+            SingleByteCharSetProber(KOI8_R_RUSSIAN_MODEL),
+            SingleByteCharSetProber(ISO_8859_5_RUSSIAN_MODEL),
+            SingleByteCharSetProber(MACCYRILLIC_RUSSIAN_MODEL),
+            SingleByteCharSetProber(IBM866_RUSSIAN_MODEL),
+            SingleByteCharSetProber(IBM855_RUSSIAN_MODEL),
+            SingleByteCharSetProber(ISO_8859_7_GREEK_MODEL),
+            SingleByteCharSetProber(WINDOWS_1253_GREEK_MODEL),
+            SingleByteCharSetProber(ISO_8859_5_BULGARIAN_MODEL),
+            SingleByteCharSetProber(WINDOWS_1251_BULGARIAN_MODEL),
+            # TODO: Restore Hungarian encodings (iso-8859-2 and windows-1250)
+            #       after we retrain model.
+            # SingleByteCharSetProber(ISO_8859_2_HUNGARIAN_MODEL),
+            # SingleByteCharSetProber(WINDOWS_1250_HUNGARIAN_MODEL),
+            SingleByteCharSetProber(TIS_620_THAI_MODEL),
+            SingleByteCharSetProber(ISO_8859_9_TURKISH_MODEL),
+            hebrew_prober,
+            logical_hebrew_prober,
+            visual_hebrew_prober,
+        ]
+        self.reset()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sjisprober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sjisprober.py
new file mode 100644
index 0000000..3bcbdb7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/sjisprober.py
@@ -0,0 +1,98 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .chardistribution import SJISDistributionAnalysis
+from .codingstatemachine import CodingStateMachine
+from .enums import MachineState, ProbingState
+from .jpcntx import SJISContextAnalysis
+from .mbcharsetprober import MultiByteCharSetProber
+from .mbcssm import SJIS_SM_MODEL
+
+
+class SJISProber(MultiByteCharSetProber):
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(SJIS_SM_MODEL)
+        self.distribution_analyzer = SJISDistributionAnalysis()
+        self.context_analyzer = SJISContextAnalysis()
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        self.context_analyzer.reset()
+
+    @property
+    def charset_name(self):
+        return self.context_analyzer.charset_name
+
+    @property
+    def language(self):
+        return "Japanese"
+
+    def feed(self, byte_str):
+        for i, byte in enumerate(byte_str):
+            coding_state = self.coding_sm.next_state(byte)
+            if coding_state == MachineState.ERROR:
+                self.logger.debug(
+                    "%s %s prober hit error at byte %s",
+                    self.charset_name,
+                    self.language,
+                    i,
+                )
+                self._state = ProbingState.NOT_ME
+                break
+            if coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            if coding_state == MachineState.START:
+                char_len = self.coding_sm.get_current_charlen()
+                if i == 0:
+                    self._last_char[1] = byte
+                    self.context_analyzer.feed(
+                        self._last_char[2 - char_len :], char_len
+                    )
+                    self.distribution_analyzer.feed(self._last_char, char_len)
+                else:
+                    self.context_analyzer.feed(
+                        byte_str[i + 1 - char_len : i + 3 - char_len], char_len
+                    )
+                    self.distribution_analyzer.feed(byte_str[i - 1 : i + 1], char_len)
+
+        self._last_char[0] = byte_str[-1]
+
+        if self.state == ProbingState.DETECTING:
+            if self.context_analyzer.got_enough_data() and (
+                self.get_confidence() > self.SHORTCUT_THRESHOLD
+            ):
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        context_conf = self.context_analyzer.get_confidence()
+        distrib_conf = self.distribution_analyzer.get_confidence()
+        return max(context_conf, distrib_conf)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/universaldetector.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/universaldetector.py
new file mode 100644
index 0000000..22fcf82
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/universaldetector.py
@@ -0,0 +1,328 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is Mozilla Universal charset detector code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 2001
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#   Shy Shalom - original C code
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+"""
+Module containing the UniversalDetector detector class, which is the primary
+class a user of ``chardet`` should use.
+
+:author: Mark Pilgrim (initial port to Python)
+:author: Shy Shalom (original C code)
+:author: Dan Blanchard (major refactoring for 3.0)
+:author: Ian Cordasco
+"""
+
+
+import codecs
+import logging
+import re
+
+from .charsetgroupprober import CharSetGroupProber
+from .enums import InputState, LanguageFilter, ProbingState
+from .escprober import EscCharSetProber
+from .latin1prober import Latin1Prober
+from .mbcsgroupprober import MBCSGroupProber
+from .sbcsgroupprober import SBCSGroupProber
+from .utf1632prober import UTF1632Prober
+
+
+class UniversalDetector:
+    """
+    The ``UniversalDetector`` class underlies the ``chardet.detect`` function
+    and coordinates all of the different charset probers.
+
+    To get a ``dict`` containing an encoding and its confidence, you can simply
+    run:
+
+    .. code::
+
+            u = UniversalDetector()
+            u.feed(some_bytes)
+            u.close()
+            detected = u.result
+
+    """
+
+    MINIMUM_THRESHOLD = 0.20
+    HIGH_BYTE_DETECTOR = re.compile(b"[\x80-\xFF]")
+    ESC_DETECTOR = re.compile(b"(\033|~{)")
+    WIN_BYTE_DETECTOR = re.compile(b"[\x80-\x9F]")
+    ISO_WIN_MAP = {
+        "iso-8859-1": "Windows-1252",
+        "iso-8859-2": "Windows-1250",
+        "iso-8859-5": "Windows-1251",
+        "iso-8859-6": "Windows-1256",
+        "iso-8859-7": "Windows-1253",
+        "iso-8859-8": "Windows-1255",
+        "iso-8859-9": "Windows-1254",
+        "iso-8859-13": "Windows-1257",
+    }
+
+    def __init__(self, lang_filter=LanguageFilter.ALL):
+        self._esc_charset_prober = None
+        self._utf1632_prober = None
+        self._charset_probers = []
+        self.result = None
+        self.done = None
+        self._got_data = None
+        self._input_state = None
+        self._last_char = None
+        self.lang_filter = lang_filter
+        self.logger = logging.getLogger(__name__)
+        self._has_win_bytes = None
+        self.reset()
+
+    @property
+    def input_state(self):
+        return self._input_state
+
+    @property
+    def has_win_bytes(self):
+        return self._has_win_bytes
+
+    @property
+    def charset_probers(self):
+        return self._charset_probers
+
+    def reset(self):
+        """
+        Reset the UniversalDetector and all of its probers back to their
+        initial states.  This is called by ``__init__``, so you only need to
+        call this directly in between analyses of different documents.
+        """
+        self.result = {"encoding": None, "confidence": 0.0, "language": None}
+        self.done = False
+        self._got_data = False
+        self._has_win_bytes = False
+        self._input_state = InputState.PURE_ASCII
+        self._last_char = b""
+        if self._esc_charset_prober:
+            self._esc_charset_prober.reset()
+        if self._utf1632_prober:
+            self._utf1632_prober.reset()
+        for prober in self._charset_probers:
+            prober.reset()
+
+    def feed(self, byte_str):
+        """
+        Takes a chunk of a document and feeds it through all of the relevant
+        charset probers.
+
+        After calling ``feed``, you can check the value of the ``done``
+        attribute to see if you need to continue feeding the
+        ``UniversalDetector`` more data, or if it has made a prediction
+        (in the ``result`` attribute).
+
+        .. note::
+           You should always call ``close`` when you're done feeding in your
+           document if ``done`` is not already ``True``.
+        """
+        if self.done:
+            return
+
+        if not byte_str:
+            return
+
+        if not isinstance(byte_str, bytearray):
+            byte_str = bytearray(byte_str)
+
+        # First check for known BOMs, since these are guaranteed to be correct
+        if not self._got_data:
+            # If the data starts with BOM, we know it is UTF
+            if byte_str.startswith(codecs.BOM_UTF8):
+                # EF BB BF  UTF-8 with BOM
+                self.result = {
+                    "encoding": "UTF-8-SIG",
+                    "confidence": 1.0,
+                    "language": "",
+                }
+            elif byte_str.startswith((codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE)):
+                # FF FE 00 00  UTF-32, little-endian BOM
+                # 00 00 FE FF  UTF-32, big-endian BOM
+                self.result = {"encoding": "UTF-32", "confidence": 1.0, "language": ""}
+            elif byte_str.startswith(b"\xFE\xFF\x00\x00"):
+                # FE FF 00 00  UCS-4, unusual octet order BOM (3412)
+                self.result = {
+                    "encoding": "X-ISO-10646-UCS-4-3412",
+                    "confidence": 1.0,
+                    "language": "",
+                }
+            elif byte_str.startswith(b"\x00\x00\xFF\xFE"):
+                # 00 00 FF FE  UCS-4, unusual octet order BOM (2143)
+                self.result = {
+                    "encoding": "X-ISO-10646-UCS-4-2143",
+                    "confidence": 1.0,
+                    "language": "",
+                }
+            elif byte_str.startswith((codecs.BOM_LE, codecs.BOM_BE)):
+                # FF FE  UTF-16, little endian BOM
+                # FE FF  UTF-16, big endian BOM
+                self.result = {"encoding": "UTF-16", "confidence": 1.0, "language": ""}
+
+            self._got_data = True
+            if self.result["encoding"] is not None:
+                self.done = True
+                return
+
+        # If none of those matched and we've only see ASCII so far, check
+        # for high bytes and escape sequences
+        if self._input_state == InputState.PURE_ASCII:
+            if self.HIGH_BYTE_DETECTOR.search(byte_str):
+                self._input_state = InputState.HIGH_BYTE
+            elif (
+                self._input_state == InputState.PURE_ASCII
+                and self.ESC_DETECTOR.search(self._last_char + byte_str)
+            ):
+                self._input_state = InputState.ESC_ASCII
+
+        self._last_char = byte_str[-1:]
+
+        # next we will look to see if it is appears to be either a UTF-16 or
+        # UTF-32 encoding
+        if not self._utf1632_prober:
+            self._utf1632_prober = UTF1632Prober()
+
+        if self._utf1632_prober.state == ProbingState.DETECTING:
+            if self._utf1632_prober.feed(byte_str) == ProbingState.FOUND_IT:
+                self.result = {
+                    "encoding": self._utf1632_prober.charset_name,
+                    "confidence": self._utf1632_prober.get_confidence(),
+                    "language": "",
+                }
+                self.done = True
+                return
+
+        # If we've seen escape sequences, use the EscCharSetProber, which
+        # uses a simple state machine to check for known escape sequences in
+        # HZ and ISO-2022 encodings, since those are the only encodings that
+        # use such sequences.
+        if self._input_state == InputState.ESC_ASCII:
+            if not self._esc_charset_prober:
+                self._esc_charset_prober = EscCharSetProber(self.lang_filter)
+            if self._esc_charset_prober.feed(byte_str) == ProbingState.FOUND_IT:
+                self.result = {
+                    "encoding": self._esc_charset_prober.charset_name,
+                    "confidence": self._esc_charset_prober.get_confidence(),
+                    "language": self._esc_charset_prober.language,
+                }
+                self.done = True
+        # If we've seen high bytes (i.e., those with values greater than 127),
+        # we need to do more complicated checks using all our multi-byte and
+        # single-byte probers that are left.  The single-byte probers
+        # use character bigram distributions to determine the encoding, whereas
+        # the multi-byte probers use a combination of character unigram and
+        # bigram distributions.
+        elif self._input_state == InputState.HIGH_BYTE:
+            if not self._charset_probers:
+                self._charset_probers = [MBCSGroupProber(self.lang_filter)]
+                # If we're checking non-CJK encodings, use single-byte prober
+                if self.lang_filter & LanguageFilter.NON_CJK:
+                    self._charset_probers.append(SBCSGroupProber())
+                self._charset_probers.append(Latin1Prober())
+            for prober in self._charset_probers:
+                if prober.feed(byte_str) == ProbingState.FOUND_IT:
+                    self.result = {
+                        "encoding": prober.charset_name,
+                        "confidence": prober.get_confidence(),
+                        "language": prober.language,
+                    }
+                    self.done = True
+                    break
+            if self.WIN_BYTE_DETECTOR.search(byte_str):
+                self._has_win_bytes = True
+
+    def close(self):
+        """
+        Stop analyzing the current document and come up with a final
+        prediction.
+
+        :returns:  The ``result`` attribute, a ``dict`` with the keys
+                   `encoding`, `confidence`, and `language`.
+        """
+        # Don't bother with checks if we're already done
+        if self.done:
+            return self.result
+        self.done = True
+
+        if not self._got_data:
+            self.logger.debug("no data received!")
+
+        # Default to ASCII if it is all we've seen so far
+        elif self._input_state == InputState.PURE_ASCII:
+            self.result = {"encoding": "ascii", "confidence": 1.0, "language": ""}
+
+        # If we have seen non-ASCII, return the best that met MINIMUM_THRESHOLD
+        elif self._input_state == InputState.HIGH_BYTE:
+            prober_confidence = None
+            max_prober_confidence = 0.0
+            max_prober = None
+            for prober in self._charset_probers:
+                if not prober:
+                    continue
+                prober_confidence = prober.get_confidence()
+                if prober_confidence > max_prober_confidence:
+                    max_prober_confidence = prober_confidence
+                    max_prober = prober
+            if max_prober and (max_prober_confidence > self.MINIMUM_THRESHOLD):
+                charset_name = max_prober.charset_name
+                lower_charset_name = max_prober.charset_name.lower()
+                confidence = max_prober.get_confidence()
+                # Use Windows encoding name instead of ISO-8859 if we saw any
+                # extra Windows-specific bytes
+                if lower_charset_name.startswith("iso-8859"):
+                    if self._has_win_bytes:
+                        charset_name = self.ISO_WIN_MAP.get(
+                            lower_charset_name, charset_name
+                        )
+                self.result = {
+                    "encoding": charset_name,
+                    "confidence": confidence,
+                    "language": max_prober.language,
+                }
+
+        # Log all prober confidences if none met MINIMUM_THRESHOLD
+        if self.logger.getEffectiveLevel() <= logging.DEBUG:
+            if self.result["encoding"] is None:
+                self.logger.debug("no probers hit minimum threshold")
+                for group_prober in self._charset_probers:
+                    if not group_prober:
+                        continue
+                    if isinstance(group_prober, CharSetGroupProber):
+                        for prober in group_prober.probers:
+                            self.logger.debug(
+                                "%s %s confidence = %s",
+                                prober.charset_name,
+                                prober.language,
+                                prober.get_confidence(),
+                            )
+                    else:
+                        self.logger.debug(
+                            "%s %s confidence = %s",
+                            group_prober.charset_name,
+                            group_prober.language,
+                            group_prober.get_confidence(),
+                        )
+        return self.result
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf1632prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf1632prober.py
new file mode 100644
index 0000000..9fd1580
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf1632prober.py
@@ -0,0 +1,223 @@
+######################## BEGIN LICENSE BLOCK ########################
+#
+# Contributor(s):
+#   Jason Zavaglia
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+from .charsetprober import CharSetProber
+from .enums import ProbingState
+
+
+class UTF1632Prober(CharSetProber):
+    """
+    This class simply looks for occurrences of zero bytes, and infers
+    whether the file is UTF16 or UTF32 (low-endian or big-endian)
+    For instance, files looking like ( \0 \0 \0 [nonzero] )+
+    have a good probability to be UTF32BE.  Files looking like ( \0 [nonzero] )+
+    may be guessed to be UTF16BE, and inversely for little-endian varieties.
+    """
+
+    # how many logical characters to scan before feeling confident of prediction
+    MIN_CHARS_FOR_DETECTION = 20
+    # a fixed constant ratio of expected zeros or non-zeros in modulo-position.
+    EXPECTED_RATIO = 0.94
+
+    def __init__(self):
+        super().__init__()
+        self.position = 0
+        self.zeros_at_mod = [0] * 4
+        self.nonzeros_at_mod = [0] * 4
+        self._state = ProbingState.DETECTING
+        self.quad = [0, 0, 0, 0]
+        self.invalid_utf16be = False
+        self.invalid_utf16le = False
+        self.invalid_utf32be = False
+        self.invalid_utf32le = False
+        self.first_half_surrogate_pair_detected_16be = False
+        self.first_half_surrogate_pair_detected_16le = False
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        self.position = 0
+        self.zeros_at_mod = [0] * 4
+        self.nonzeros_at_mod = [0] * 4
+        self._state = ProbingState.DETECTING
+        self.invalid_utf16be = False
+        self.invalid_utf16le = False
+        self.invalid_utf32be = False
+        self.invalid_utf32le = False
+        self.first_half_surrogate_pair_detected_16be = False
+        self.first_half_surrogate_pair_detected_16le = False
+        self.quad = [0, 0, 0, 0]
+
+    @property
+    def charset_name(self):
+        if self.is_likely_utf32be():
+            return "utf-32be"
+        if self.is_likely_utf32le():
+            return "utf-32le"
+        if self.is_likely_utf16be():
+            return "utf-16be"
+        if self.is_likely_utf16le():
+            return "utf-16le"
+        # default to something valid
+        return "utf-16"
+
+    @property
+    def language(self):
+        return ""
+
+    def approx_32bit_chars(self):
+        return max(1.0, self.position / 4.0)
+
+    def approx_16bit_chars(self):
+        return max(1.0, self.position / 2.0)
+
+    def is_likely_utf32be(self):
+        approx_chars = self.approx_32bit_chars()
+        return approx_chars >= self.MIN_CHARS_FOR_DETECTION and (
+            self.zeros_at_mod[0] / approx_chars > self.EXPECTED_RATIO
+            and self.zeros_at_mod[1] / approx_chars > self.EXPECTED_RATIO
+            and self.zeros_at_mod[2] / approx_chars > self.EXPECTED_RATIO
+            and self.nonzeros_at_mod[3] / approx_chars > self.EXPECTED_RATIO
+            and not self.invalid_utf32be
+        )
+
+    def is_likely_utf32le(self):
+        approx_chars = self.approx_32bit_chars()
+        return approx_chars >= self.MIN_CHARS_FOR_DETECTION and (
+            self.nonzeros_at_mod[0] / approx_chars > self.EXPECTED_RATIO
+            and self.zeros_at_mod[1] / approx_chars > self.EXPECTED_RATIO
+            and self.zeros_at_mod[2] / approx_chars > self.EXPECTED_RATIO
+            and self.zeros_at_mod[3] / approx_chars > self.EXPECTED_RATIO
+            and not self.invalid_utf32le
+        )
+
+    def is_likely_utf16be(self):
+        approx_chars = self.approx_16bit_chars()
+        return approx_chars >= self.MIN_CHARS_FOR_DETECTION and (
+            (self.nonzeros_at_mod[1] + self.nonzeros_at_mod[3]) / approx_chars
+            > self.EXPECTED_RATIO
+            and (self.zeros_at_mod[0] + self.zeros_at_mod[2]) / approx_chars
+            > self.EXPECTED_RATIO
+            and not self.invalid_utf16be
+        )
+
+    def is_likely_utf16le(self):
+        approx_chars = self.approx_16bit_chars()
+        return approx_chars >= self.MIN_CHARS_FOR_DETECTION and (
+            (self.nonzeros_at_mod[0] + self.nonzeros_at_mod[2]) / approx_chars
+            > self.EXPECTED_RATIO
+            and (self.zeros_at_mod[1] + self.zeros_at_mod[3]) / approx_chars
+            > self.EXPECTED_RATIO
+            and not self.invalid_utf16le
+        )
+
+    def validate_utf32_characters(self, quad):
+        """
+        Validate if the quad of bytes is valid UTF-32.
+
+        UTF-32 is valid in the range 0x00000000 - 0x0010FFFF
+        excluding 0x0000D800 - 0x0000DFFF
+
+        https://en.wikipedia.org/wiki/UTF-32
+        """
+        if (
+            quad[0] != 0
+            or quad[1] > 0x10
+            or (quad[0] == 0 and quad[1] == 0 and 0xD8 <= quad[2] <= 0xDF)
+        ):
+            self.invalid_utf32be = True
+        if (
+            quad[3] != 0
+            or quad[2] > 0x10
+            or (quad[3] == 0 and quad[2] == 0 and 0xD8 <= quad[1] <= 0xDF)
+        ):
+            self.invalid_utf32le = True
+
+    def validate_utf16_characters(self, pair):
+        """
+        Validate if the pair of bytes is  valid UTF-16.
+
+        UTF-16 is valid in the range 0x0000 - 0xFFFF excluding 0xD800 - 0xFFFF
+        with an exception for surrogate pairs, which must be in the range
+        0xD800-0xDBFF followed by 0xDC00-0xDFFF
+
+        https://en.wikipedia.org/wiki/UTF-16
+        """
+        if not self.first_half_surrogate_pair_detected_16be:
+            if 0xD8 <= pair[0] <= 0xDB:
+                self.first_half_surrogate_pair_detected_16be = True
+            elif 0xDC <= pair[0] <= 0xDF:
+                self.invalid_utf16be = True
+        else:
+            if 0xDC <= pair[0] <= 0xDF:
+                self.first_half_surrogate_pair_detected_16be = False
+            else:
+                self.invalid_utf16be = True
+
+        if not self.first_half_surrogate_pair_detected_16le:
+            if 0xD8 <= pair[1] <= 0xDB:
+                self.first_half_surrogate_pair_detected_16le = True
+            elif 0xDC <= pair[1] <= 0xDF:
+                self.invalid_utf16le = True
+        else:
+            if 0xDC <= pair[1] <= 0xDF:
+                self.first_half_surrogate_pair_detected_16le = False
+            else:
+                self.invalid_utf16le = True
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            mod4 = self.position % 4
+            self.quad[mod4] = c
+            if mod4 == 3:
+                self.validate_utf32_characters(self.quad)
+                self.validate_utf16_characters(self.quad[0:2])
+                self.validate_utf16_characters(self.quad[2:4])
+            if c == 0:
+                self.zeros_at_mod[mod4] += 1
+            else:
+                self.nonzeros_at_mod[mod4] += 1
+            self.position += 1
+        return self.state
+
+    @property
+    def state(self):
+        if self._state in {ProbingState.NOT_ME, ProbingState.FOUND_IT}:
+            # terminal, decided states
+            return self._state
+        if self.get_confidence() > 0.80:
+            self._state = ProbingState.FOUND_IT
+        elif self.position > 4 * 1024:
+            # if we get to 4kb into the file, and we can't conclude it's UTF,
+            # let's give up
+            self._state = ProbingState.NOT_ME
+        return self._state
+
+    def get_confidence(self):
+        return (
+            0.85
+            if (
+                self.is_likely_utf16le()
+                or self.is_likely_utf16be()
+                or self.is_likely_utf32le()
+                or self.is_likely_utf32be()
+            )
+            else 0.00
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf8prober.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf8prober.py
new file mode 100644
index 0000000..3aae09e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/utf8prober.py
@@ -0,0 +1,80 @@
+######################## BEGIN LICENSE BLOCK ########################
+# The Original Code is mozilla.org code.
+#
+# The Initial Developer of the Original Code is
+# Netscape Communications Corporation.
+# Portions created by the Initial Developer are Copyright (C) 1998
+# the Initial Developer. All Rights Reserved.
+#
+# Contributor(s):
+#   Mark Pilgrim - port to Python
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+# 02110-1301  USA
+######################### END LICENSE BLOCK #########################
+
+from .charsetprober import CharSetProber
+from .codingstatemachine import CodingStateMachine
+from .enums import MachineState, ProbingState
+from .mbcssm import UTF8_SM_MODEL
+
+
+class UTF8Prober(CharSetProber):
+    ONE_CHAR_PROB = 0.5
+
+    def __init__(self):
+        super().__init__()
+        self.coding_sm = CodingStateMachine(UTF8_SM_MODEL)
+        self._num_mb_chars = None
+        self.reset()
+
+    def reset(self):
+        super().reset()
+        self.coding_sm.reset()
+        self._num_mb_chars = 0
+
+    @property
+    def charset_name(self):
+        return "utf-8"
+
+    @property
+    def language(self):
+        return ""
+
+    def feed(self, byte_str):
+        for c in byte_str:
+            coding_state = self.coding_sm.next_state(c)
+            if coding_state == MachineState.ERROR:
+                self._state = ProbingState.NOT_ME
+                break
+            if coding_state == MachineState.ITS_ME:
+                self._state = ProbingState.FOUND_IT
+                break
+            if coding_state == MachineState.START:
+                if self.coding_sm.get_current_charlen() >= 2:
+                    self._num_mb_chars += 1
+
+        if self.state == ProbingState.DETECTING:
+            if self.get_confidence() > self.SHORTCUT_THRESHOLD:
+                self._state = ProbingState.FOUND_IT
+
+        return self.state
+
+    def get_confidence(self):
+        unlike = 0.99
+        if self._num_mb_chars < 6:
+            unlike *= self.ONE_CHAR_PROB**self._num_mb_chars
+            return 1.0 - unlike
+        return unlike
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/chardet/version.py b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/version.py
new file mode 100644
index 0000000..a08a06b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/chardet/version.py
@@ -0,0 +1,9 @@
+"""
+This module exists only to simplify retrieving the version number of chardet
+from within setup.py and from chardet subpackages.
+
+:author: Dan Blanchard (dan.blanchard@gmail.com)
+"""
+
+__version__ = "5.0.0"
+VERSION = __version__.split(".")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__init__.py
new file mode 100644
index 0000000..9138a8c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__init__.py
@@ -0,0 +1,6 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from .initialise import init, deinit, reinit, colorama_text
+from .ansi import Fore, Back, Style, Cursor
+from .ansitowin32 import AnsiToWin32
+
+__version__ = '0.4.5'
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..d30a6af
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-39.pyc
new file mode 100644
index 0000000..d9d503e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansi.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-39.pyc
new file mode 100644
index 0000000..95c740f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/ansitowin32.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-39.pyc
new file mode 100644
index 0000000..752e557
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/initialise.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-39.pyc
new file mode 100644
index 0000000..bc144bb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/win32.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-39.pyc
new file mode 100644
index 0000000..57bce66
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/__pycache__/winterm.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansi.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansi.py
new file mode 100644
index 0000000..11ec695
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansi.py
@@ -0,0 +1,102 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+'''
+This module generates ANSI character codes to printing colors to terminals.
+See: http://en.wikipedia.org/wiki/ANSI_escape_code
+'''
+
+CSI = '\033['
+OSC = '\033]'
+BEL = '\a'
+
+
+def code_to_chars(code):
+    return CSI + str(code) + 'm'
+
+def set_title(title):
+    return OSC + '2;' + title + BEL
+
+def clear_screen(mode=2):
+    return CSI + str(mode) + 'J'
+
+def clear_line(mode=2):
+    return CSI + str(mode) + 'K'
+
+
+class AnsiCodes(object):
+    def __init__(self):
+        # the subclasses declare class attributes which are numbers.
+        # Upon instantiation we define instance attributes, which are the same
+        # as the class attributes but wrapped with the ANSI escape sequence
+        for name in dir(self):
+            if not name.startswith('_'):
+                value = getattr(self, name)
+                setattr(self, name, code_to_chars(value))
+
+
+class AnsiCursor(object):
+    def UP(self, n=1):
+        return CSI + str(n) + 'A'
+    def DOWN(self, n=1):
+        return CSI + str(n) + 'B'
+    def FORWARD(self, n=1):
+        return CSI + str(n) + 'C'
+    def BACK(self, n=1):
+        return CSI + str(n) + 'D'
+    def POS(self, x=1, y=1):
+        return CSI + str(y) + ';' + str(x) + 'H'
+
+
+class AnsiFore(AnsiCodes):
+    BLACK           = 30
+    RED             = 31
+    GREEN           = 32
+    YELLOW          = 33
+    BLUE            = 34
+    MAGENTA         = 35
+    CYAN            = 36
+    WHITE           = 37
+    RESET           = 39
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 90
+    LIGHTRED_EX     = 91
+    LIGHTGREEN_EX   = 92
+    LIGHTYELLOW_EX  = 93
+    LIGHTBLUE_EX    = 94
+    LIGHTMAGENTA_EX = 95
+    LIGHTCYAN_EX    = 96
+    LIGHTWHITE_EX   = 97
+
+
+class AnsiBack(AnsiCodes):
+    BLACK           = 40
+    RED             = 41
+    GREEN           = 42
+    YELLOW          = 43
+    BLUE            = 44
+    MAGENTA         = 45
+    CYAN            = 46
+    WHITE           = 47
+    RESET           = 49
+
+    # These are fairly well supported, but not part of the standard.
+    LIGHTBLACK_EX   = 100
+    LIGHTRED_EX     = 101
+    LIGHTGREEN_EX   = 102
+    LIGHTYELLOW_EX  = 103
+    LIGHTBLUE_EX    = 104
+    LIGHTMAGENTA_EX = 105
+    LIGHTCYAN_EX    = 106
+    LIGHTWHITE_EX   = 107
+
+
+class AnsiStyle(AnsiCodes):
+    BRIGHT    = 1
+    DIM       = 2
+    NORMAL    = 22
+    RESET_ALL = 0
+
+Fore   = AnsiFore()
+Back   = AnsiBack()
+Style  = AnsiStyle()
+Cursor = AnsiCursor()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansitowin32.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansitowin32.py
new file mode 100644
index 0000000..3db248b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/ansitowin32.py
@@ -0,0 +1,266 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import re
+import sys
+import os
+
+from .ansi import AnsiFore, AnsiBack, AnsiStyle, Style, BEL
+from .winterm import WinTerm, WinColor, WinStyle
+from .win32 import windll, winapi_test
+
+
+winterm = None
+if windll is not None:
+    winterm = WinTerm()
+
+
+class StreamWrapper(object):
+    '''
+    Wraps a stream (such as stdout), acting as a transparent proxy for all
+    attribute access apart from method 'write()', which is delegated to our
+    Converter instance.
+    '''
+    def __init__(self, wrapped, converter):
+        # double-underscore everything to prevent clashes with names of
+        # attributes on the wrapped stream object.
+        self.__wrapped = wrapped
+        self.__convertor = converter
+
+    def __getattr__(self, name):
+        return getattr(self.__wrapped, name)
+
+    def __enter__(self, *args, **kwargs):
+        # special method lookup bypasses __getattr__/__getattribute__, see
+        # https://stackoverflow.com/questions/12632894/why-doesnt-getattr-work-with-exit
+        # thus, contextlib magic methods are not proxied via __getattr__
+        return self.__wrapped.__enter__(*args, **kwargs)
+
+    def __exit__(self, *args, **kwargs):
+        return self.__wrapped.__exit__(*args, **kwargs)
+
+    def __setstate__(self, state):
+        self.__dict__ = state
+
+    def __getstate__(self):
+        return self.__dict__
+
+    def write(self, text):
+        self.__convertor.write(text)
+
+    def isatty(self):
+        stream = self.__wrapped
+        if 'PYCHARM_HOSTED' in os.environ:
+            if stream is not None and (stream is sys.__stdout__ or stream is sys.__stderr__):
+                return True
+        try:
+            stream_isatty = stream.isatty
+        except AttributeError:
+            return False
+        else:
+            return stream_isatty()
+
+    @property
+    def closed(self):
+        stream = self.__wrapped
+        try:
+            return stream.closed
+        # AttributeError in the case that the stream doesn't support being closed
+        # ValueError for the case that the stream has already been detached when atexit runs
+        except (AttributeError, ValueError):
+            return True
+
+
+class AnsiToWin32(object):
+    '''
+    Implements a 'write()' method which, on Windows, will strip ANSI character
+    sequences from the text, and if outputting to a tty, will convert them into
+    win32 function calls.
+    '''
+    ANSI_CSI_RE = re.compile('\001?\033\\[((?:\\d|;)*)([a-zA-Z])\002?')   # Control Sequence Introducer
+    ANSI_OSC_RE = re.compile('\001?\033\\]([^\a]*)(\a)\002?')             # Operating System Command
+
+    def __init__(self, wrapped, convert=None, strip=None, autoreset=False):
+        # The wrapped stream (normally sys.stdout or sys.stderr)
+        self.wrapped = wrapped
+
+        # should we reset colors to defaults after every .write()
+        self.autoreset = autoreset
+
+        # create the proxy wrapping our output stream
+        self.stream = StreamWrapper(wrapped, self)
+
+        on_windows = os.name == 'nt'
+        # We test if the WinAPI works, because even if we are on Windows
+        # we may be using a terminal that doesn't support the WinAPI
+        # (e.g. Cygwin Terminal). In this case it's up to the terminal
+        # to support the ANSI codes.
+        conversion_supported = on_windows and winapi_test()
+
+        # should we strip ANSI sequences from our output?
+        if strip is None:
+            strip = conversion_supported or (not self.stream.closed and not self.stream.isatty())
+        self.strip = strip
+
+        # should we should convert ANSI sequences into win32 calls?
+        if convert is None:
+            convert = conversion_supported and not self.stream.closed and self.stream.isatty()
+        self.convert = convert
+
+        # dict of ansi codes to win32 functions and parameters
+        self.win32_calls = self.get_win32_calls()
+
+        # are we wrapping stderr?
+        self.on_stderr = self.wrapped is sys.stderr
+
+    def should_wrap(self):
+        '''
+        True if this class is actually needed. If false, then the output
+        stream will not be affected, nor will win32 calls be issued, so
+        wrapping stdout is not actually required. This will generally be
+        False on non-Windows platforms, unless optional functionality like
+        autoreset has been requested using kwargs to init()
+        '''
+        return self.convert or self.strip or self.autoreset
+
+    def get_win32_calls(self):
+        if self.convert and winterm:
+            return {
+                AnsiStyle.RESET_ALL: (winterm.reset_all, ),
+                AnsiStyle.BRIGHT: (winterm.style, WinStyle.BRIGHT),
+                AnsiStyle.DIM: (winterm.style, WinStyle.NORMAL),
+                AnsiStyle.NORMAL: (winterm.style, WinStyle.NORMAL),
+                AnsiFore.BLACK: (winterm.fore, WinColor.BLACK),
+                AnsiFore.RED: (winterm.fore, WinColor.RED),
+                AnsiFore.GREEN: (winterm.fore, WinColor.GREEN),
+                AnsiFore.YELLOW: (winterm.fore, WinColor.YELLOW),
+                AnsiFore.BLUE: (winterm.fore, WinColor.BLUE),
+                AnsiFore.MAGENTA: (winterm.fore, WinColor.MAGENTA),
+                AnsiFore.CYAN: (winterm.fore, WinColor.CYAN),
+                AnsiFore.WHITE: (winterm.fore, WinColor.GREY),
+                AnsiFore.RESET: (winterm.fore, ),
+                AnsiFore.LIGHTBLACK_EX: (winterm.fore, WinColor.BLACK, True),
+                AnsiFore.LIGHTRED_EX: (winterm.fore, WinColor.RED, True),
+                AnsiFore.LIGHTGREEN_EX: (winterm.fore, WinColor.GREEN, True),
+                AnsiFore.LIGHTYELLOW_EX: (winterm.fore, WinColor.YELLOW, True),
+                AnsiFore.LIGHTBLUE_EX: (winterm.fore, WinColor.BLUE, True),
+                AnsiFore.LIGHTMAGENTA_EX: (winterm.fore, WinColor.MAGENTA, True),
+                AnsiFore.LIGHTCYAN_EX: (winterm.fore, WinColor.CYAN, True),
+                AnsiFore.LIGHTWHITE_EX: (winterm.fore, WinColor.GREY, True),
+                AnsiBack.BLACK: (winterm.back, WinColor.BLACK),
+                AnsiBack.RED: (winterm.back, WinColor.RED),
+                AnsiBack.GREEN: (winterm.back, WinColor.GREEN),
+                AnsiBack.YELLOW: (winterm.back, WinColor.YELLOW),
+                AnsiBack.BLUE: (winterm.back, WinColor.BLUE),
+                AnsiBack.MAGENTA: (winterm.back, WinColor.MAGENTA),
+                AnsiBack.CYAN: (winterm.back, WinColor.CYAN),
+                AnsiBack.WHITE: (winterm.back, WinColor.GREY),
+                AnsiBack.RESET: (winterm.back, ),
+                AnsiBack.LIGHTBLACK_EX: (winterm.back, WinColor.BLACK, True),
+                AnsiBack.LIGHTRED_EX: (winterm.back, WinColor.RED, True),
+                AnsiBack.LIGHTGREEN_EX: (winterm.back, WinColor.GREEN, True),
+                AnsiBack.LIGHTYELLOW_EX: (winterm.back, WinColor.YELLOW, True),
+                AnsiBack.LIGHTBLUE_EX: (winterm.back, WinColor.BLUE, True),
+                AnsiBack.LIGHTMAGENTA_EX: (winterm.back, WinColor.MAGENTA, True),
+                AnsiBack.LIGHTCYAN_EX: (winterm.back, WinColor.CYAN, True),
+                AnsiBack.LIGHTWHITE_EX: (winterm.back, WinColor.GREY, True),
+            }
+        return dict()
+
+    def write(self, text):
+        if self.strip or self.convert:
+            self.write_and_convert(text)
+        else:
+            self.wrapped.write(text)
+            self.wrapped.flush()
+        if self.autoreset:
+            self.reset_all()
+
+
+    def reset_all(self):
+        if self.convert:
+            self.call_win32('m', (0,))
+        elif not self.strip and not self.stream.closed:
+            self.wrapped.write(Style.RESET_ALL)
+
+
+    def write_and_convert(self, text):
+        '''
+        Write the given text to our wrapped stream, stripping any ANSI
+        sequences from the text, and optionally converting them into win32
+        calls.
+        '''
+        cursor = 0
+        text = self.convert_osc(text)
+        for match in self.ANSI_CSI_RE.finditer(text):
+            start, end = match.span()
+            self.write_plain_text(text, cursor, start)
+            self.convert_ansi(*match.groups())
+            cursor = end
+        self.write_plain_text(text, cursor, len(text))
+
+
+    def write_plain_text(self, text, start, end):
+        if start < end:
+            self.wrapped.write(text[start:end])
+            self.wrapped.flush()
+
+
+    def convert_ansi(self, paramstring, command):
+        if self.convert:
+            params = self.extract_params(command, paramstring)
+            self.call_win32(command, params)
+
+
+    def extract_params(self, command, paramstring):
+        if command in 'Hf':
+            params = tuple(int(p) if len(p) != 0 else 1 for p in paramstring.split(';'))
+            while len(params) < 2:
+                # defaults:
+                params = params + (1,)
+        else:
+            params = tuple(int(p) for p in paramstring.split(';') if len(p) != 0)
+            if len(params) == 0:
+                # defaults:
+                if command in 'JKm':
+                    params = (0,)
+                elif command in 'ABCD':
+                    params = (1,)
+
+        return params
+
+
+    def call_win32(self, command, params):
+        if command == 'm':
+            for param in params:
+                if param in self.win32_calls:
+                    func_args = self.win32_calls[param]
+                    func = func_args[0]
+                    args = func_args[1:]
+                    kwargs = dict(on_stderr=self.on_stderr)
+                    func(*args, **kwargs)
+        elif command in 'J':
+            winterm.erase_screen(params[0], on_stderr=self.on_stderr)
+        elif command in 'K':
+            winterm.erase_line(params[0], on_stderr=self.on_stderr)
+        elif command in 'Hf':     # cursor position - absolute
+            winterm.set_cursor_position(params, on_stderr=self.on_stderr)
+        elif command in 'ABCD':   # cursor position - relative
+            n = params[0]
+            # A - up, B - down, C - forward, D - back
+            x, y = {'A': (0, -n), 'B': (0, n), 'C': (n, 0), 'D': (-n, 0)}[command]
+            winterm.cursor_adjust(x, y, on_stderr=self.on_stderr)
+
+
+    def convert_osc(self, text):
+        for match in self.ANSI_OSC_RE.finditer(text):
+            start, end = match.span()
+            text = text[:start] + text[end:]
+            paramstring, command = match.groups()
+            if command == BEL:
+                if paramstring.count(";") == 1:
+                    params = paramstring.split(";")
+                    # 0 - change title and icon (we will only change title)
+                    # 1 - change icon (we don't support this)
+                    # 2 - change title
+                    if params[0] in '02':
+                        winterm.set_title(params[1])
+        return text
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/initialise.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/initialise.py
new file mode 100644
index 0000000..430d066
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/initialise.py
@@ -0,0 +1,80 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+import atexit
+import contextlib
+import sys
+
+from .ansitowin32 import AnsiToWin32
+
+
+orig_stdout = None
+orig_stderr = None
+
+wrapped_stdout = None
+wrapped_stderr = None
+
+atexit_done = False
+
+
+def reset_all():
+    if AnsiToWin32 is not None:    # Issue #74: objects might become None at exit
+        AnsiToWin32(orig_stdout).reset_all()
+
+
+def init(autoreset=False, convert=None, strip=None, wrap=True):
+
+    if not wrap and any([autoreset, convert, strip]):
+        raise ValueError('wrap=False conflicts with any other arg=True')
+
+    global wrapped_stdout, wrapped_stderr
+    global orig_stdout, orig_stderr
+
+    orig_stdout = sys.stdout
+    orig_stderr = sys.stderr
+
+    if sys.stdout is None:
+        wrapped_stdout = None
+    else:
+        sys.stdout = wrapped_stdout = \
+            wrap_stream(orig_stdout, convert, strip, autoreset, wrap)
+    if sys.stderr is None:
+        wrapped_stderr = None
+    else:
+        sys.stderr = wrapped_stderr = \
+            wrap_stream(orig_stderr, convert, strip, autoreset, wrap)
+
+    global atexit_done
+    if not atexit_done:
+        atexit.register(reset_all)
+        atexit_done = True
+
+
+def deinit():
+    if orig_stdout is not None:
+        sys.stdout = orig_stdout
+    if orig_stderr is not None:
+        sys.stderr = orig_stderr
+
+
+@contextlib.contextmanager
+def colorama_text(*args, **kwargs):
+    init(*args, **kwargs)
+    try:
+        yield
+    finally:
+        deinit()
+
+
+def reinit():
+    if wrapped_stdout is not None:
+        sys.stdout = wrapped_stdout
+    if wrapped_stderr is not None:
+        sys.stderr = wrapped_stderr
+
+
+def wrap_stream(stream, convert, strip, autoreset, wrap):
+    if wrap:
+        wrapper = AnsiToWin32(stream,
+            convert=convert, strip=strip, autoreset=autoreset)
+        if wrapper.should_wrap():
+            stream = wrapper.stream
+    return stream
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/win32.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/win32.py
new file mode 100644
index 0000000..c2d8360
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/win32.py
@@ -0,0 +1,152 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+
+# from winbase.h
+STDOUT = -11
+STDERR = -12
+
+try:
+    import ctypes
+    from ctypes import LibraryLoader
+    windll = LibraryLoader(ctypes.WinDLL)
+    from ctypes import wintypes
+except (AttributeError, ImportError):
+    windll = None
+    SetConsoleTextAttribute = lambda *_: None
+    winapi_test = lambda *_: None
+else:
+    from ctypes import byref, Structure, c_char, POINTER
+
+    COORD = wintypes._COORD
+
+    class CONSOLE_SCREEN_BUFFER_INFO(Structure):
+        """struct in wincon.h."""
+        _fields_ = [
+            ("dwSize", COORD),
+            ("dwCursorPosition", COORD),
+            ("wAttributes", wintypes.WORD),
+            ("srWindow", wintypes.SMALL_RECT),
+            ("dwMaximumWindowSize", COORD),
+        ]
+        def __str__(self):
+            return '(%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d)' % (
+                self.dwSize.Y, self.dwSize.X
+                , self.dwCursorPosition.Y, self.dwCursorPosition.X
+                , self.wAttributes
+                , self.srWindow.Top, self.srWindow.Left, self.srWindow.Bottom, self.srWindow.Right
+                , self.dwMaximumWindowSize.Y, self.dwMaximumWindowSize.X
+            )
+
+    _GetStdHandle = windll.kernel32.GetStdHandle
+    _GetStdHandle.argtypes = [
+        wintypes.DWORD,
+    ]
+    _GetStdHandle.restype = wintypes.HANDLE
+
+    _GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo
+    _GetConsoleScreenBufferInfo.argtypes = [
+        wintypes.HANDLE,
+        POINTER(CONSOLE_SCREEN_BUFFER_INFO),
+    ]
+    _GetConsoleScreenBufferInfo.restype = wintypes.BOOL
+
+    _SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute
+    _SetConsoleTextAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+    ]
+    _SetConsoleTextAttribute.restype = wintypes.BOOL
+
+    _SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition
+    _SetConsoleCursorPosition.argtypes = [
+        wintypes.HANDLE,
+        COORD,
+    ]
+    _SetConsoleCursorPosition.restype = wintypes.BOOL
+
+    _FillConsoleOutputCharacterA = windll.kernel32.FillConsoleOutputCharacterA
+    _FillConsoleOutputCharacterA.argtypes = [
+        wintypes.HANDLE,
+        c_char,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputCharacterA.restype = wintypes.BOOL
+
+    _FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute
+    _FillConsoleOutputAttribute.argtypes = [
+        wintypes.HANDLE,
+        wintypes.WORD,
+        wintypes.DWORD,
+        COORD,
+        POINTER(wintypes.DWORD),
+    ]
+    _FillConsoleOutputAttribute.restype = wintypes.BOOL
+
+    _SetConsoleTitleW = windll.kernel32.SetConsoleTitleW
+    _SetConsoleTitleW.argtypes = [
+        wintypes.LPCWSTR
+    ]
+    _SetConsoleTitleW.restype = wintypes.BOOL
+
+    def _winapi_test(handle):
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return bool(success)
+
+    def winapi_test():
+        return any(_winapi_test(h) for h in
+                   (_GetStdHandle(STDOUT), _GetStdHandle(STDERR)))
+
+    def GetConsoleScreenBufferInfo(stream_id=STDOUT):
+        handle = _GetStdHandle(stream_id)
+        csbi = CONSOLE_SCREEN_BUFFER_INFO()
+        success = _GetConsoleScreenBufferInfo(
+            handle, byref(csbi))
+        return csbi
+
+    def SetConsoleTextAttribute(stream_id, attrs):
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleTextAttribute(handle, attrs)
+
+    def SetConsoleCursorPosition(stream_id, position, adjust=True):
+        position = COORD(*position)
+        # If the position is out of range, do nothing.
+        if position.Y <= 0 or position.X <= 0:
+            return
+        # Adjust for Windows' SetConsoleCursorPosition:
+        #    1. being 0-based, while ANSI is 1-based.
+        #    2. expecting (x,y), while ANSI uses (y,x).
+        adjusted_position = COORD(position.Y - 1, position.X - 1)
+        if adjust:
+            # Adjust for viewport's scroll position
+            sr = GetConsoleScreenBufferInfo(STDOUT).srWindow
+            adjusted_position.Y += sr.Top
+            adjusted_position.X += sr.Left
+        # Resume normal processing
+        handle = _GetStdHandle(stream_id)
+        return _SetConsoleCursorPosition(handle, adjusted_position)
+
+    def FillConsoleOutputCharacter(stream_id, char, length, start):
+        handle = _GetStdHandle(stream_id)
+        char = c_char(char.encode())
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        success = _FillConsoleOutputCharacterA(
+            handle, char, length, start, byref(num_written))
+        return num_written.value
+
+    def FillConsoleOutputAttribute(stream_id, attr, length, start):
+        ''' FillConsoleOutputAttribute( hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten )'''
+        handle = _GetStdHandle(stream_id)
+        attribute = wintypes.WORD(attr)
+        length = wintypes.DWORD(length)
+        num_written = wintypes.DWORD(0)
+        # Note that this is hard-coded for ANSI (vs wide) bytes.
+        return _FillConsoleOutputAttribute(
+            handle, attribute, length, start, byref(num_written))
+
+    def SetConsoleTitle(title):
+        return _SetConsoleTitleW(title)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/colorama/winterm.py b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/winterm.py
new file mode 100644
index 0000000..0fdb4ec
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/colorama/winterm.py
@@ -0,0 +1,169 @@
+# Copyright Jonathan Hartley 2013. BSD 3-Clause license, see LICENSE file.
+from . import win32
+
+
+# from wincon.h
+class WinColor(object):
+    BLACK   = 0
+    BLUE    = 1
+    GREEN   = 2
+    CYAN    = 3
+    RED     = 4
+    MAGENTA = 5
+    YELLOW  = 6
+    GREY    = 7
+
+# from wincon.h
+class WinStyle(object):
+    NORMAL              = 0x00 # dim text, dim background
+    BRIGHT              = 0x08 # bright text, dim background
+    BRIGHT_BACKGROUND   = 0x80 # dim text, bright background
+
+class WinTerm(object):
+
+    def __init__(self):
+        self._default = win32.GetConsoleScreenBufferInfo(win32.STDOUT).wAttributes
+        self.set_attrs(self._default)
+        self._default_fore = self._fore
+        self._default_back = self._back
+        self._default_style = self._style
+        # In order to emulate LIGHT_EX in windows, we borrow the BRIGHT style.
+        # So that LIGHT_EX colors and BRIGHT style do not clobber each other,
+        # we track them separately, since LIGHT_EX is overwritten by Fore/Back
+        # and BRIGHT is overwritten by Style codes.
+        self._light = 0
+
+    def get_attrs(self):
+        return self._fore + self._back * 16 + (self._style | self._light)
+
+    def set_attrs(self, value):
+        self._fore = value & 7
+        self._back = (value >> 4) & 7
+        self._style = value & (WinStyle.BRIGHT | WinStyle.BRIGHT_BACKGROUND)
+
+    def reset_all(self, on_stderr=None):
+        self.set_attrs(self._default)
+        self.set_console(attrs=self._default)
+        self._light = 0
+
+    def fore(self, fore=None, light=False, on_stderr=False):
+        if fore is None:
+            fore = self._default_fore
+        self._fore = fore
+        # Emulate LIGHT_EX with BRIGHT Style
+        if light:
+            self._light |= WinStyle.BRIGHT
+        else:
+            self._light &= ~WinStyle.BRIGHT
+        self.set_console(on_stderr=on_stderr)
+
+    def back(self, back=None, light=False, on_stderr=False):
+        if back is None:
+            back = self._default_back
+        self._back = back
+        # Emulate LIGHT_EX with BRIGHT_BACKGROUND Style
+        if light:
+            self._light |= WinStyle.BRIGHT_BACKGROUND
+        else:
+            self._light &= ~WinStyle.BRIGHT_BACKGROUND
+        self.set_console(on_stderr=on_stderr)
+
+    def style(self, style=None, on_stderr=False):
+        if style is None:
+            style = self._default_style
+        self._style = style
+        self.set_console(on_stderr=on_stderr)
+
+    def set_console(self, attrs=None, on_stderr=False):
+        if attrs is None:
+            attrs = self.get_attrs()
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleTextAttribute(handle, attrs)
+
+    def get_position(self, handle):
+        position = win32.GetConsoleScreenBufferInfo(handle).dwCursorPosition
+        # Because Windows coordinates are 0-based,
+        # and win32.SetConsoleCursorPosition expects 1-based.
+        position.X += 1
+        position.Y += 1
+        return position
+
+    def set_cursor_position(self, position=None, on_stderr=False):
+        if position is None:
+            # I'm not currently tracking the position, so there is no default.
+            # position = self.get_position()
+            return
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        win32.SetConsoleCursorPosition(handle, position)
+
+    def cursor_adjust(self, x, y, on_stderr=False):
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        position = self.get_position(handle)
+        adjusted_position = (position.Y + y, position.X + x)
+        win32.SetConsoleCursorPosition(handle, adjusted_position, adjust=False)
+
+    def erase_screen(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the screen.
+        # 1 should clear from the cursor to the beginning of the screen.
+        # 2 should clear the entire screen, and move cursor to (1,1)
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        # get the number of character cells in the current buffer
+        cells_in_screen = csbi.dwSize.X * csbi.dwSize.Y
+        # get number of character cells before current cursor position
+        cells_before_cursor = csbi.dwSize.X * csbi.dwCursorPosition.Y + csbi.dwCursorPosition.X
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = cells_in_screen - cells_before_cursor
+        elif mode == 1:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_before_cursor
+        elif mode == 2:
+            from_coord = win32.COORD(0, 0)
+            cells_to_erase = cells_in_screen
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+        if mode == 2:
+            # put the cursor where needed
+            win32.SetConsoleCursorPosition(handle, (1, 1))
+
+    def erase_line(self, mode=0, on_stderr=False):
+        # 0 should clear from the cursor to the end of the line.
+        # 1 should clear from the cursor to the beginning of the line.
+        # 2 should clear the entire line.
+        handle = win32.STDOUT
+        if on_stderr:
+            handle = win32.STDERR
+        csbi = win32.GetConsoleScreenBufferInfo(handle)
+        if mode == 0:
+            from_coord = csbi.dwCursorPosition
+            cells_to_erase = csbi.dwSize.X - csbi.dwCursorPosition.X
+        elif mode == 1:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwCursorPosition.X
+        elif mode == 2:
+            from_coord = win32.COORD(0, csbi.dwCursorPosition.Y)
+            cells_to_erase = csbi.dwSize.X
+        else:
+            # invalid mode
+            return
+        # fill the entire screen with blanks
+        win32.FillConsoleOutputCharacter(handle, ' ', cells_to_erase, from_coord)
+        # now set the buffer's attributes accordingly
+        win32.FillConsoleOutputAttribute(handle, self.get_attrs(), cells_to_erase, from_coord)
+
+    def set_title(self, title):
+        win32.SetConsoleTitle(title)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__init__.py
new file mode 100644
index 0000000..962173c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__init__.py
@@ -0,0 +1,23 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2022 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import logging
+
+__version__ = '0.3.6'
+
+class DistlibException(Exception):
+    pass
+
+try:
+    from logging import NullHandler
+except ImportError: # pragma: no cover
+    class NullHandler(logging.Handler):
+        def handle(self, record): pass
+        def emit(self, record): pass
+        def createLock(self): self.lock = None
+
+logger = logging.getLogger(__name__)
+logger.addHandler(NullHandler())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..3a70dc1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-39.pyc
new file mode 100644
index 0000000..6320e30
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/compat.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/database.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/__pycache__/database.cpython-39.pyc
new file mode 100644
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@@ -0,0 +1,1116 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import absolute_import
+
+import os
+import re
+import sys
+
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+
+if sys.version_info[0] < 3:  # pragma: no cover
+    from StringIO import StringIO
+    string_types = basestring,
+    text_type = unicode
+    from types import FileType as file_type
+    import __builtin__ as builtins
+    import ConfigParser as configparser
+    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urlunsplit
+    from urllib import (urlretrieve, quote as _quote, unquote, url2pathname,
+                        pathname2url, ContentTooShortError, splittype)
+
+    def quote(s):
+        if isinstance(s, unicode):
+            s = s.encode('utf-8')
+        return _quote(s)
+
+    import urllib2
+    from urllib2 import (Request, urlopen, URLError, HTTPError,
+                         HTTPBasicAuthHandler, HTTPPasswordMgr,
+                         HTTPHandler, HTTPRedirectHandler,
+                         build_opener)
+    if ssl:
+        from urllib2 import HTTPSHandler
+    import httplib
+    import xmlrpclib
+    import Queue as queue
+    from HTMLParser import HTMLParser
+    import htmlentitydefs
+    raw_input = raw_input
+    from itertools import ifilter as filter
+    from itertools import ifilterfalse as filterfalse
+
+    # Leaving this around for now, in case it needs resurrecting in some way
+    # _userprog = None
+    # def splituser(host):
+        # """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+        # global _userprog
+        # if _userprog is None:
+            # import re
+            # _userprog = re.compile('^(.*)@(.*)$')
+
+        # match = _userprog.match(host)
+        # if match: return match.group(1, 2)
+        # return None, host
+
+else:  # pragma: no cover
+    from io import StringIO
+    string_types = str,
+    text_type = str
+    from io import TextIOWrapper as file_type
+    import builtins
+    import configparser
+    import shutil
+    from urllib.parse import (urlparse, urlunparse, urljoin, quote,
+                              unquote, urlsplit, urlunsplit, splittype)
+    from urllib.request import (urlopen, urlretrieve, Request, url2pathname,
+                                pathname2url,
+                                HTTPBasicAuthHandler, HTTPPasswordMgr,
+                                HTTPHandler, HTTPRedirectHandler,
+                                build_opener)
+    if ssl:
+        from urllib.request import HTTPSHandler
+    from urllib.error import HTTPError, URLError, ContentTooShortError
+    import http.client as httplib
+    import urllib.request as urllib2
+    import xmlrpc.client as xmlrpclib
+    import queue
+    from html.parser import HTMLParser
+    import html.entities as htmlentitydefs
+    raw_input = input
+    from itertools import filterfalse
+    filter = filter
+
+
+try:
+    from ssl import match_hostname, CertificateError
+except ImportError: # pragma: no cover
+    class CertificateError(ValueError):
+        pass
+
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        http://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        parts = dn.split('.')
+        leftmost, remainder = parts[0], parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate, match_hostname needs a "
+                             "SSL socket or SSL context with either "
+                             "CERT_OPTIONAL or CERT_REQUIRED")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+try:
+    from types import SimpleNamespace as Container
+except ImportError:  # pragma: no cover
+    class Container(object):
+        """
+        A generic container for when multiple values need to be returned
+        """
+        def __init__(self, **kwargs):
+            self.__dict__.update(kwargs)
+
+
+try:
+    from shutil import which
+except ImportError:  # pragma: no cover
+    # Implementation from Python 3.3
+    def which(cmd, mode=os.F_OK | os.X_OK, path=None):
+        """Given a command, mode, and a PATH string, return the path which
+        conforms to the given mode on the PATH, or None if there is no such
+        file.
+
+        `mode` defaults to os.F_OK | os.X_OK. `path` defaults to the result
+        of os.environ.get("PATH"), or can be overridden with a custom search
+        path.
+
+        """
+        # Check that a given file can be accessed with the correct mode.
+        # Additionally check that `file` is not a directory, as on Windows
+        # directories pass the os.access check.
+        def _access_check(fn, mode):
+            return (os.path.exists(fn) and os.access(fn, mode)
+                    and not os.path.isdir(fn))
+
+        # If we're given a path with a directory part, look it up directly rather
+        # than referring to PATH directories. This includes checking relative to the
+        # current directory, e.g. ./script
+        if os.path.dirname(cmd):
+            if _access_check(cmd, mode):
+                return cmd
+            return None
+
+        if path is None:
+            path = os.environ.get("PATH", os.defpath)
+        if not path:
+            return None
+        path = path.split(os.pathsep)
+
+        if sys.platform == "win32":
+            # The current directory takes precedence on Windows.
+            if not os.curdir in path:
+                path.insert(0, os.curdir)
+
+            # PATHEXT is necessary to check on Windows.
+            pathext = os.environ.get("PATHEXT", "").split(os.pathsep)
+            # See if the given file matches any of the expected path extensions.
+            # This will allow us to short circuit when given "python.exe".
+            # If it does match, only test that one, otherwise we have to try
+            # others.
+            if any(cmd.lower().endswith(ext.lower()) for ext in pathext):
+                files = [cmd]
+            else:
+                files = [cmd + ext for ext in pathext]
+        else:
+            # On other platforms you don't have things like PATHEXT to tell you
+            # what file suffixes are executable, so just pass on cmd as-is.
+            files = [cmd]
+
+        seen = set()
+        for dir in path:
+            normdir = os.path.normcase(dir)
+            if not normdir in seen:
+                seen.add(normdir)
+                for thefile in files:
+                    name = os.path.join(dir, thefile)
+                    if _access_check(name, mode):
+                        return name
+        return None
+
+
+# ZipFile is a context manager in 2.7, but not in 2.6
+
+from zipfile import ZipFile as BaseZipFile
+
+if hasattr(BaseZipFile, '__enter__'):  # pragma: no cover
+    ZipFile = BaseZipFile
+else:  # pragma: no cover
+    from zipfile import ZipExtFile as BaseZipExtFile
+
+    class ZipExtFile(BaseZipExtFile):
+        def __init__(self, base):
+            self.__dict__.update(base.__dict__)
+
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+    class ZipFile(BaseZipFile):
+        def __enter__(self):
+            return self
+
+        def __exit__(self, *exc_info):
+            self.close()
+            # return None, so if an exception occurred, it will propagate
+
+        def open(self, *args, **kwargs):
+            base = BaseZipFile.open(self, *args, **kwargs)
+            return ZipExtFile(base)
+
+try:
+    from platform import python_implementation
+except ImportError: # pragma: no cover
+    def python_implementation():
+        """Return a string identifying the Python implementation."""
+        if 'PyPy' in sys.version:
+            return 'PyPy'
+        if os.name == 'java':
+            return 'Jython'
+        if sys.version.startswith('IronPython'):
+            return 'IronPython'
+        return 'CPython'
+
+import shutil
+import sysconfig
+
+try:
+    callable = callable
+except NameError:   # pragma: no cover
+    from collections.abc import Callable
+
+    def callable(obj):
+        return isinstance(obj, Callable)
+
+
+try:
+    fsencode = os.fsencode
+    fsdecode = os.fsdecode
+except AttributeError:  # pragma: no cover
+    # Issue #99: on some systems (e.g. containerised),
+    # sys.getfilesystemencoding() returns None, and we need a real value,
+    # so fall back to utf-8. From the CPython 2.7 docs relating to Unix and
+    # sys.getfilesystemencoding(): the return value is "the user’s preference
+    # according to the result of nl_langinfo(CODESET), or None if the
+    # nl_langinfo(CODESET) failed."
+    _fsencoding = sys.getfilesystemencoding() or 'utf-8'
+    if _fsencoding == 'mbcs':
+        _fserrors = 'strict'
+    else:
+        _fserrors = 'surrogateescape'
+
+    def fsencode(filename):
+        if isinstance(filename, bytes):
+            return filename
+        elif isinstance(filename, text_type):
+            return filename.encode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+    def fsdecode(filename):
+        if isinstance(filename, text_type):
+            return filename
+        elif isinstance(filename, bytes):
+            return filename.decode(_fsencoding, _fserrors)
+        else:
+            raise TypeError("expect bytes or str, not %s" %
+                            type(filename).__name__)
+
+try:
+    from tokenize import detect_encoding
+except ImportError: # pragma: no cover
+    from codecs import BOM_UTF8, lookup
+    import re
+
+    cookie_re = re.compile(r"coding[:=]\s*([-\w.]+)")
+
+    def _get_normal_name(orig_enc):
+        """Imitates get_normal_name in tokenizer.c."""
+        # Only care about the first 12 characters.
+        enc = orig_enc[:12].lower().replace("_", "-")
+        if enc == "utf-8" or enc.startswith("utf-8-"):
+            return "utf-8"
+        if enc in ("latin-1", "iso-8859-1", "iso-latin-1") or \
+           enc.startswith(("latin-1-", "iso-8859-1-", "iso-latin-1-")):
+            return "iso-8859-1"
+        return orig_enc
+
+    def detect_encoding(readline):
+        """
+        The detect_encoding() function is used to detect the encoding that should
+        be used to decode a Python source file.  It requires one argument, readline,
+        in the same way as the tokenize() generator.
+
+        It will call readline a maximum of twice, and return the encoding used
+        (as a string) and a list of any lines (left as bytes) it has read in.
+
+        It detects the encoding from the presence of a utf-8 bom or an encoding
+        cookie as specified in pep-0263.  If both a bom and a cookie are present,
+        but disagree, a SyntaxError will be raised.  If the encoding cookie is an
+        invalid charset, raise a SyntaxError.  Note that if a utf-8 bom is found,
+        'utf-8-sig' is returned.
+
+        If no encoding is specified, then the default of 'utf-8' will be returned.
+        """
+        try:
+            filename = readline.__self__.name
+        except AttributeError:
+            filename = None
+        bom_found = False
+        encoding = None
+        default = 'utf-8'
+        def read_or_stop():
+            try:
+                return readline()
+            except StopIteration:
+                return b''
+
+        def find_cookie(line):
+            try:
+                # Decode as UTF-8. Either the line is an encoding declaration,
+                # in which case it should be pure ASCII, or it must be UTF-8
+                # per default encoding.
+                line_string = line.decode('utf-8')
+            except UnicodeDecodeError:
+                msg = "invalid or missing encoding declaration"
+                if filename is not None:
+                    msg = '{} for {!r}'.format(msg, filename)
+                raise SyntaxError(msg)
+
+            matches = cookie_re.findall(line_string)
+            if not matches:
+                return None
+            encoding = _get_normal_name(matches[0])
+            try:
+                codec = lookup(encoding)
+            except LookupError:
+                # This behaviour mimics the Python interpreter
+                if filename is None:
+                    msg = "unknown encoding: " + encoding
+                else:
+                    msg = "unknown encoding for {!r}: {}".format(filename,
+                            encoding)
+                raise SyntaxError(msg)
+
+            if bom_found:
+                if codec.name != 'utf-8':
+                    # This behaviour mimics the Python interpreter
+                    if filename is None:
+                        msg = 'encoding problem: utf-8'
+                    else:
+                        msg = 'encoding problem for {!r}: utf-8'.format(filename)
+                    raise SyntaxError(msg)
+                encoding += '-sig'
+            return encoding
+
+        first = read_or_stop()
+        if first.startswith(BOM_UTF8):
+            bom_found = True
+            first = first[3:]
+            default = 'utf-8-sig'
+        if not first:
+            return default, []
+
+        encoding = find_cookie(first)
+        if encoding:
+            return encoding, [first]
+
+        second = read_or_stop()
+        if not second:
+            return default, [first]
+
+        encoding = find_cookie(second)
+        if encoding:
+            return encoding, [first, second]
+
+        return default, [first, second]
+
+# For converting & <-> &amp; etc.
+try:
+    from html import escape
+except ImportError:
+    from cgi import escape
+if sys.version_info[:2] < (3, 4):
+    unescape = HTMLParser().unescape
+else:
+    from html import unescape
+
+try:
+    from collections import ChainMap
+except ImportError: # pragma: no cover
+    from collections import MutableMapping
+
+    try:
+        from reprlib import recursive_repr as _recursive_repr
+    except ImportError:
+        def _recursive_repr(fillvalue='...'):
+            '''
+            Decorator to make a repr function return fillvalue for a recursive
+            call
+            '''
+
+            def decorating_function(user_function):
+                repr_running = set()
+
+                def wrapper(self):
+                    key = id(self), get_ident()
+                    if key in repr_running:
+                        return fillvalue
+                    repr_running.add(key)
+                    try:
+                        result = user_function(self)
+                    finally:
+                        repr_running.discard(key)
+                    return result
+
+                # Can't use functools.wraps() here because of bootstrap issues
+                wrapper.__module__ = getattr(user_function, '__module__')
+                wrapper.__doc__ = getattr(user_function, '__doc__')
+                wrapper.__name__ = getattr(user_function, '__name__')
+                wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
+                return wrapper
+
+            return decorating_function
+
+    class ChainMap(MutableMapping):
+        ''' A ChainMap groups multiple dicts (or other mappings) together
+        to create a single, updateable view.
+
+        The underlying mappings are stored in a list.  That list is public and can
+        accessed or updated using the *maps* attribute.  There is no other state.
+
+        Lookups search the underlying mappings successively until a key is found.
+        In contrast, writes, updates, and deletions only operate on the first
+        mapping.
+
+        '''
+
+        def __init__(self, *maps):
+            '''Initialize a ChainMap by setting *maps* to the given mappings.
+            If no mappings are provided, a single empty dictionary is used.
+
+            '''
+            self.maps = list(maps) or [{}]          # always at least one map
+
+        def __missing__(self, key):
+            raise KeyError(key)
+
+        def __getitem__(self, key):
+            for mapping in self.maps:
+                try:
+                    return mapping[key]             # can't use 'key in mapping' with defaultdict
+                except KeyError:
+                    pass
+            return self.__missing__(key)            # support subclasses that define __missing__
+
+        def get(self, key, default=None):
+            return self[key] if key in self else default
+
+        def __len__(self):
+            return len(set().union(*self.maps))     # reuses stored hash values if possible
+
+        def __iter__(self):
+            return iter(set().union(*self.maps))
+
+        def __contains__(self, key):
+            return any(key in m for m in self.maps)
+
+        def __bool__(self):
+            return any(self.maps)
+
+        @_recursive_repr()
+        def __repr__(self):
+            return '{0.__class__.__name__}({1})'.format(
+                self, ', '.join(map(repr, self.maps)))
+
+        @classmethod
+        def fromkeys(cls, iterable, *args):
+            'Create a ChainMap with a single dict created from the iterable.'
+            return cls(dict.fromkeys(iterable, *args))
+
+        def copy(self):
+            'New ChainMap or subclass with a new copy of maps[0] and refs to maps[1:]'
+            return self.__class__(self.maps[0].copy(), *self.maps[1:])
+
+        __copy__ = copy
+
+        def new_child(self):                        # like Django's Context.push()
+            'New ChainMap with a new dict followed by all previous maps.'
+            return self.__class__({}, *self.maps)
+
+        @property
+        def parents(self):                          # like Django's Context.pop()
+            'New ChainMap from maps[1:].'
+            return self.__class__(*self.maps[1:])
+
+        def __setitem__(self, key, value):
+            self.maps[0][key] = value
+
+        def __delitem__(self, key):
+            try:
+                del self.maps[0][key]
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def popitem(self):
+            'Remove and return an item pair from maps[0]. Raise KeyError is maps[0] is empty.'
+            try:
+                return self.maps[0].popitem()
+            except KeyError:
+                raise KeyError('No keys found in the first mapping.')
+
+        def pop(self, key, *args):
+            'Remove *key* from maps[0] and return its value. Raise KeyError if *key* not in maps[0].'
+            try:
+                return self.maps[0].pop(key, *args)
+            except KeyError:
+                raise KeyError('Key not found in the first mapping: {!r}'.format(key))
+
+        def clear(self):
+            'Clear maps[0], leaving maps[1:] intact.'
+            self.maps[0].clear()
+
+try:
+    from importlib.util import cache_from_source  # Python >= 3.4
+except ImportError:  # pragma: no cover
+    def cache_from_source(path, debug_override=None):
+        assert path.endswith('.py')
+        if debug_override is None:
+            debug_override = __debug__
+        if debug_override:
+            suffix = 'c'
+        else:
+            suffix = 'o'
+        return path + suffix
+
+try:
+    from collections import OrderedDict
+except ImportError: # pragma: no cover
+## {{{ http://code.activestate.com/recipes/576693/ (r9)
+# Backport of OrderedDict() class that runs on Python 2.4, 2.5, 2.6, 2.7 and pypy.
+# Passes Python2.7's test suite and incorporates all the latest updates.
+    try:
+        from thread import get_ident as _get_ident
+    except ImportError:
+        from dummy_thread import get_ident as _get_ident
+
+    try:
+        from _abcoll import KeysView, ValuesView, ItemsView
+    except ImportError:
+        pass
+
+
+    class OrderedDict(dict):
+        'Dictionary that remembers insertion order'
+        # An inherited dict maps keys to values.
+        # The inherited dict provides __getitem__, __len__, __contains__, and get.
+        # The remaining methods are order-aware.
+        # Big-O running times for all methods are the same as for regular dictionaries.
+
+        # The internal self.__map dictionary maps keys to links in a doubly linked list.
+        # The circular doubly linked list starts and ends with a sentinel element.
+        # The sentinel element never gets deleted (this simplifies the algorithm).
+        # Each link is stored as a list of length three:  [PREV, NEXT, KEY].
+
+        def __init__(self, *args, **kwds):
+            '''Initialize an ordered dictionary.  Signature is the same as for
+            regular dictionaries, but keyword arguments are not recommended
+            because their insertion order is arbitrary.
+
+            '''
+            if len(args) > 1:
+                raise TypeError('expected at most 1 arguments, got %d' % len(args))
+            try:
+                self.__root
+            except AttributeError:
+                self.__root = root = []                     # sentinel node
+                root[:] = [root, root, None]
+                self.__map = {}
+            self.__update(*args, **kwds)
+
+        def __setitem__(self, key, value, dict_setitem=dict.__setitem__):
+            'od.__setitem__(i, y) <==> od[i]=y'
+            # Setting a new item creates a new link which goes at the end of the linked
+            # list, and the inherited dictionary is updated with the new key/value pair.
+            if key not in self:
+                root = self.__root
+                last = root[0]
+                last[1] = root[0] = self.__map[key] = [last, root, key]
+            dict_setitem(self, key, value)
+
+        def __delitem__(self, key, dict_delitem=dict.__delitem__):
+            'od.__delitem__(y) <==> del od[y]'
+            # Deleting an existing item uses self.__map to find the link which is
+            # then removed by updating the links in the predecessor and successor nodes.
+            dict_delitem(self, key)
+            link_prev, link_next, key = self.__map.pop(key)
+            link_prev[1] = link_next
+            link_next[0] = link_prev
+
+        def __iter__(self):
+            'od.__iter__() <==> iter(od)'
+            root = self.__root
+            curr = root[1]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[1]
+
+        def __reversed__(self):
+            'od.__reversed__() <==> reversed(od)'
+            root = self.__root
+            curr = root[0]
+            while curr is not root:
+                yield curr[2]
+                curr = curr[0]
+
+        def clear(self):
+            'od.clear() -> None.  Remove all items from od.'
+            try:
+                for node in self.__map.itervalues():
+                    del node[:]
+                root = self.__root
+                root[:] = [root, root, None]
+                self.__map.clear()
+            except AttributeError:
+                pass
+            dict.clear(self)
+
+        def popitem(self, last=True):
+            '''od.popitem() -> (k, v), return and remove a (key, value) pair.
+            Pairs are returned in LIFO order if last is true or FIFO order if false.
+
+            '''
+            if not self:
+                raise KeyError('dictionary is empty')
+            root = self.__root
+            if last:
+                link = root[0]
+                link_prev = link[0]
+                link_prev[1] = root
+                root[0] = link_prev
+            else:
+                link = root[1]
+                link_next = link[1]
+                root[1] = link_next
+                link_next[0] = root
+            key = link[2]
+            del self.__map[key]
+            value = dict.pop(self, key)
+            return key, value
+
+        # -- the following methods do not depend on the internal structure --
+
+        def keys(self):
+            'od.keys() -> list of keys in od'
+            return list(self)
+
+        def values(self):
+            'od.values() -> list of values in od'
+            return [self[key] for key in self]
+
+        def items(self):
+            'od.items() -> list of (key, value) pairs in od'
+            return [(key, self[key]) for key in self]
+
+        def iterkeys(self):
+            'od.iterkeys() -> an iterator over the keys in od'
+            return iter(self)
+
+        def itervalues(self):
+            'od.itervalues -> an iterator over the values in od'
+            for k in self:
+                yield self[k]
+
+        def iteritems(self):
+            'od.iteritems -> an iterator over the (key, value) items in od'
+            for k in self:
+                yield (k, self[k])
+
+        def update(*args, **kwds):
+            '''od.update(E, **F) -> None.  Update od from dict/iterable E and F.
+
+            If E is a dict instance, does:           for k in E: od[k] = E[k]
+            If E has a .keys() method, does:         for k in E.keys(): od[k] = E[k]
+            Or if E is an iterable of items, does:   for k, v in E: od[k] = v
+            In either case, this is followed by:     for k, v in F.items(): od[k] = v
+
+            '''
+            if len(args) > 2:
+                raise TypeError('update() takes at most 2 positional '
+                                'arguments (%d given)' % (len(args),))
+            elif not args:
+                raise TypeError('update() takes at least 1 argument (0 given)')
+            self = args[0]
+            # Make progressively weaker assumptions about "other"
+            other = ()
+            if len(args) == 2:
+                other = args[1]
+            if isinstance(other, dict):
+                for key in other:
+                    self[key] = other[key]
+            elif hasattr(other, 'keys'):
+                for key in other.keys():
+                    self[key] = other[key]
+            else:
+                for key, value in other:
+                    self[key] = value
+            for key, value in kwds.items():
+                self[key] = value
+
+        __update = update  # let subclasses override update without breaking __init__
+
+        __marker = object()
+
+        def pop(self, key, default=__marker):
+            '''od.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+            If key is not found, d is returned if given, otherwise KeyError is raised.
+
+            '''
+            if key in self:
+                result = self[key]
+                del self[key]
+                return result
+            if default is self.__marker:
+                raise KeyError(key)
+            return default
+
+        def setdefault(self, key, default=None):
+            'od.setdefault(k[,d]) -> od.get(k,d), also set od[k]=d if k not in od'
+            if key in self:
+                return self[key]
+            self[key] = default
+            return default
+
+        def __repr__(self, _repr_running=None):
+            'od.__repr__() <==> repr(od)'
+            if not _repr_running: _repr_running = {}
+            call_key = id(self), _get_ident()
+            if call_key in _repr_running:
+                return '...'
+            _repr_running[call_key] = 1
+            try:
+                if not self:
+                    return '%s()' % (self.__class__.__name__,)
+                return '%s(%r)' % (self.__class__.__name__, self.items())
+            finally:
+                del _repr_running[call_key]
+
+        def __reduce__(self):
+            'Return state information for pickling'
+            items = [[k, self[k]] for k in self]
+            inst_dict = vars(self).copy()
+            for k in vars(OrderedDict()):
+                inst_dict.pop(k, None)
+            if inst_dict:
+                return (self.__class__, (items,), inst_dict)
+            return self.__class__, (items,)
+
+        def copy(self):
+            'od.copy() -> a shallow copy of od'
+            return self.__class__(self)
+
+        @classmethod
+        def fromkeys(cls, iterable, value=None):
+            '''OD.fromkeys(S[, v]) -> New ordered dictionary with keys from S
+            and values equal to v (which defaults to None).
+
+            '''
+            d = cls()
+            for key in iterable:
+                d[key] = value
+            return d
+
+        def __eq__(self, other):
+            '''od.__eq__(y) <==> od==y.  Comparison to another OD is order-sensitive
+            while comparison to a regular mapping is order-insensitive.
+
+            '''
+            if isinstance(other, OrderedDict):
+                return len(self)==len(other) and self.items() == other.items()
+            return dict.__eq__(self, other)
+
+        def __ne__(self, other):
+            return not self == other
+
+        # -- the following methods are only used in Python 2.7 --
+
+        def viewkeys(self):
+            "od.viewkeys() -> a set-like object providing a view on od's keys"
+            return KeysView(self)
+
+        def viewvalues(self):
+            "od.viewvalues() -> an object providing a view on od's values"
+            return ValuesView(self)
+
+        def viewitems(self):
+            "od.viewitems() -> a set-like object providing a view on od's items"
+            return ItemsView(self)
+
+try:
+    from logging.config import BaseConfigurator, valid_ident
+except ImportError: # pragma: no cover
+    IDENTIFIER = re.compile('^[a-z_][a-z0-9_]*$', re.I)
+
+
+    def valid_ident(s):
+        m = IDENTIFIER.match(s)
+        if not m:
+            raise ValueError('Not a valid Python identifier: %r' % s)
+        return True
+
+
+    # The ConvertingXXX classes are wrappers around standard Python containers,
+    # and they serve to convert any suitable values in the container. The
+    # conversion converts base dicts, lists and tuples to their wrapped
+    # equivalents, whereas strings which match a conversion format are converted
+    # appropriately.
+    #
+    # Each wrapper should have a configurator attribute holding the actual
+    # configurator to use for conversion.
+
+    class ConvertingDict(dict):
+        """A converting dictionary wrapper."""
+
+        def __getitem__(self, key):
+            value = dict.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def get(self, key, default=None):
+            value = dict.get(self, key, default)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    def pop(self, key, default=None):
+        value = dict.pop(self, key, default)
+        result = self.configurator.convert(value)
+        if value is not result:
+            if type(result) in (ConvertingDict, ConvertingList,
+                                ConvertingTuple):
+                result.parent = self
+                result.key = key
+        return result
+
+    class ConvertingList(list):
+        """A converting list wrapper."""
+        def __getitem__(self, key):
+            value = list.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            #If the converted value is different, save for next time
+            if value is not result:
+                self[key] = result
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+        def pop(self, idx=-1):
+            value = list.pop(self, idx)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+            return result
+
+    class ConvertingTuple(tuple):
+        """A converting tuple wrapper."""
+        def __getitem__(self, key):
+            value = tuple.__getitem__(self, key)
+            result = self.configurator.convert(value)
+            if value is not result:
+                if type(result) in (ConvertingDict, ConvertingList,
+                                    ConvertingTuple):
+                    result.parent = self
+                    result.key = key
+            return result
+
+    class BaseConfigurator(object):
+        """
+        The configurator base class which defines some useful defaults.
+        """
+
+        CONVERT_PATTERN = re.compile(r'^(?P<prefix>[a-z]+)://(?P<suffix>.*)$')
+
+        WORD_PATTERN = re.compile(r'^\s*(\w+)\s*')
+        DOT_PATTERN = re.compile(r'^\.\s*(\w+)\s*')
+        INDEX_PATTERN = re.compile(r'^\[\s*(\w+)\s*\]\s*')
+        DIGIT_PATTERN = re.compile(r'^\d+$')
+
+        value_converters = {
+            'ext' : 'ext_convert',
+            'cfg' : 'cfg_convert',
+        }
+
+        # We might want to use a different one, e.g. importlib
+        importer = staticmethod(__import__)
+
+        def __init__(self, config):
+            self.config = ConvertingDict(config)
+            self.config.configurator = self
+
+        def resolve(self, s):
+            """
+            Resolve strings to objects using standard import and attribute
+            syntax.
+            """
+            name = s.split('.')
+            used = name.pop(0)
+            try:
+                found = self.importer(used)
+                for frag in name:
+                    used += '.' + frag
+                    try:
+                        found = getattr(found, frag)
+                    except AttributeError:
+                        self.importer(used)
+                        found = getattr(found, frag)
+                return found
+            except ImportError:
+                e, tb = sys.exc_info()[1:]
+                v = ValueError('Cannot resolve %r: %s' % (s, e))
+                v.__cause__, v.__traceback__ = e, tb
+                raise v
+
+        def ext_convert(self, value):
+            """Default converter for the ext:// protocol."""
+            return self.resolve(value)
+
+        def cfg_convert(self, value):
+            """Default converter for the cfg:// protocol."""
+            rest = value
+            m = self.WORD_PATTERN.match(rest)
+            if m is None:
+                raise ValueError("Unable to convert %r" % value)
+            else:
+                rest = rest[m.end():]
+                d = self.config[m.groups()[0]]
+                #print d, rest
+                while rest:
+                    m = self.DOT_PATTERN.match(rest)
+                    if m:
+                        d = d[m.groups()[0]]
+                    else:
+                        m = self.INDEX_PATTERN.match(rest)
+                        if m:
+                            idx = m.groups()[0]
+                            if not self.DIGIT_PATTERN.match(idx):
+                                d = d[idx]
+                            else:
+                                try:
+                                    n = int(idx) # try as number first (most likely)
+                                    d = d[n]
+                                except TypeError:
+                                    d = d[idx]
+                    if m:
+                        rest = rest[m.end():]
+                    else:
+                        raise ValueError('Unable to convert '
+                                         '%r at %r' % (value, rest))
+            #rest should be empty
+            return d
+
+        def convert(self, value):
+            """
+            Convert values to an appropriate type. dicts, lists and tuples are
+            replaced by their converting alternatives. Strings are checked to
+            see if they have a conversion format and are converted if they do.
+            """
+            if not isinstance(value, ConvertingDict) and isinstance(value, dict):
+                value = ConvertingDict(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingList) and isinstance(value, list):
+                value = ConvertingList(value)
+                value.configurator = self
+            elif not isinstance(value, ConvertingTuple) and\
+                     isinstance(value, tuple):
+                value = ConvertingTuple(value)
+                value.configurator = self
+            elif isinstance(value, string_types):
+                m = self.CONVERT_PATTERN.match(value)
+                if m:
+                    d = m.groupdict()
+                    prefix = d['prefix']
+                    converter = self.value_converters.get(prefix, None)
+                    if converter:
+                        suffix = d['suffix']
+                        converter = getattr(self, converter)
+                        value = converter(suffix)
+            return value
+
+        def configure_custom(self, config):
+            """Configure an object with a user-supplied factory."""
+            c = config.pop('()')
+            if not callable(c):
+                c = self.resolve(c)
+            props = config.pop('.', None)
+            # Check for valid identifiers
+            kwargs = dict([(k, config[k]) for k in config if valid_ident(k)])
+            result = c(**kwargs)
+            if props:
+                for name, value in props.items():
+                    setattr(result, name, value)
+            return result
+
+        def as_tuple(self, value):
+            """Utility function which converts lists to tuples."""
+            if isinstance(value, list):
+                value = tuple(value)
+            return value
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/database.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/database.py
new file mode 100644
index 0000000..5db5d7f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/database.py
@@ -0,0 +1,1350 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""PEP 376 implementation."""
+
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import contextlib
+import hashlib
+import logging
+import os
+import posixpath
+import sys
+import zipimport
+
+from . import DistlibException, resources
+from .compat import StringIO
+from .version import get_scheme, UnsupportedVersionError
+from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
+                       LEGACY_METADATA_FILENAME)
+from .util import (parse_requirement, cached_property, parse_name_and_version,
+                   read_exports, write_exports, CSVReader, CSVWriter)
+
+
+__all__ = ['Distribution', 'BaseInstalledDistribution',
+           'InstalledDistribution', 'EggInfoDistribution',
+           'DistributionPath']
+
+
+logger = logging.getLogger(__name__)
+
+EXPORTS_FILENAME = 'pydist-exports.json'
+COMMANDS_FILENAME = 'pydist-commands.json'
+
+DIST_FILES = ('INSTALLER', METADATA_FILENAME, 'RECORD', 'REQUESTED',
+              'RESOURCES', EXPORTS_FILENAME, 'SHARED')
+
+DISTINFO_EXT = '.dist-info'
+
+
+class _Cache(object):
+    """
+    A simple cache mapping names and .dist-info paths to distributions
+    """
+    def __init__(self):
+        """
+        Initialise an instance. There is normally one for each DistributionPath.
+        """
+        self.name = {}
+        self.path = {}
+        self.generated = False
+
+    def clear(self):
+        """
+        Clear the cache, setting it to its initial state.
+        """
+        self.name.clear()
+        self.path.clear()
+        self.generated = False
+
+    def add(self, dist):
+        """
+        Add a distribution to the cache.
+        :param dist: The distribution to add.
+        """
+        if dist.path not in self.path:
+            self.path[dist.path] = dist
+            self.name.setdefault(dist.key, []).append(dist)
+
+
+class DistributionPath(object):
+    """
+    Represents a set of distributions installed on a path (typically sys.path).
+    """
+    def __init__(self, path=None, include_egg=False):
+        """
+        Create an instance from a path, optionally including legacy (distutils/
+        setuptools/distribute) distributions.
+        :param path: The path to use, as a list of directories. If not specified,
+                     sys.path is used.
+        :param include_egg: If True, this instance will look for and return legacy
+                            distributions as well as those based on PEP 376.
+        """
+        if path is None:
+            path = sys.path
+        self.path = path
+        self._include_dist = True
+        self._include_egg = include_egg
+
+        self._cache = _Cache()
+        self._cache_egg = _Cache()
+        self._cache_enabled = True
+        self._scheme = get_scheme('default')
+
+    def _get_cache_enabled(self):
+        return self._cache_enabled
+
+    def _set_cache_enabled(self, value):
+        self._cache_enabled = value
+
+    cache_enabled = property(_get_cache_enabled, _set_cache_enabled)
+
+    def clear_cache(self):
+        """
+        Clears the internal cache.
+        """
+        self._cache.clear()
+        self._cache_egg.clear()
+
+
+    def _yield_distributions(self):
+        """
+        Yield .dist-info and/or .egg(-info) distributions.
+        """
+        # We need to check if we've seen some resources already, because on
+        # some Linux systems (e.g. some Debian/Ubuntu variants) there are
+        # symlinks which alias other files in the environment.
+        seen = set()
+        for path in self.path:
+            finder = resources.finder_for_path(path)
+            if finder is None:
+                continue
+            r = finder.find('')
+            if not r or not r.is_container:
+                continue
+            rset = sorted(r.resources)
+            for entry in rset:
+                r = finder.find(entry)
+                if not r or r.path in seen:
+                    continue
+                try:
+                    if self._include_dist and entry.endswith(DISTINFO_EXT):
+                        possible_filenames = [METADATA_FILENAME,
+                                              WHEEL_METADATA_FILENAME,
+                                              LEGACY_METADATA_FILENAME]
+                        for metadata_filename in possible_filenames:
+                            metadata_path = posixpath.join(entry, metadata_filename)
+                            pydist = finder.find(metadata_path)
+                            if pydist:
+                                break
+                        else:
+                            continue
+
+                        with contextlib.closing(pydist.as_stream()) as stream:
+                            metadata = Metadata(fileobj=stream, scheme='legacy')
+                        logger.debug('Found %s', r.path)
+                        seen.add(r.path)
+                        yield new_dist_class(r.path, metadata=metadata,
+                                             env=self)
+                    elif self._include_egg and entry.endswith(('.egg-info',
+                                                              '.egg')):
+                        logger.debug('Found %s', r.path)
+                        seen.add(r.path)
+                        yield old_dist_class(r.path, self)
+                except Exception as e:
+                    msg = 'Unable to read distribution at %s, perhaps due to bad metadata: %s'
+                    logger.warning(msg, r.path, e)
+                    import warnings
+                    warnings.warn(msg % (r.path, e), stacklevel=2)
+
+    def _generate_cache(self):
+        """
+        Scan the path for distributions and populate the cache with
+        those that are found.
+        """
+        gen_dist = not self._cache.generated
+        gen_egg = self._include_egg and not self._cache_egg.generated
+        if gen_dist or gen_egg:
+            for dist in self._yield_distributions():
+                if isinstance(dist, InstalledDistribution):
+                    self._cache.add(dist)
+                else:
+                    self._cache_egg.add(dist)
+
+            if gen_dist:
+                self._cache.generated = True
+            if gen_egg:
+                self._cache_egg.generated = True
+
+    @classmethod
+    def distinfo_dirname(cls, name, version):
+        """
+        The *name* and *version* parameters are converted into their
+        filename-escaped form, i.e. any ``'-'`` characters are replaced
+        with ``'_'`` other than the one in ``'dist-info'`` and the one
+        separating the name from the version number.
+
+        :parameter name: is converted to a standard distribution name by replacing
+                         any runs of non- alphanumeric characters with a single
+                         ``'-'``.
+        :type name: string
+        :parameter version: is converted to a standard version string. Spaces
+                            become dots, and all other non-alphanumeric characters
+                            (except dots) become dashes, with runs of multiple
+                            dashes condensed to a single dash.
+        :type version: string
+        :returns: directory name
+        :rtype: string"""
+        name = name.replace('-', '_')
+        return '-'.join([name, version]) + DISTINFO_EXT
+
+    def get_distributions(self):
+        """
+        Provides an iterator that looks for distributions and returns
+        :class:`InstalledDistribution` or
+        :class:`EggInfoDistribution` instances for each one of them.
+
+        :rtype: iterator of :class:`InstalledDistribution` and
+                :class:`EggInfoDistribution` instances
+        """
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                yield dist
+        else:
+            self._generate_cache()
+
+            for dist in self._cache.path.values():
+                yield dist
+
+            if self._include_egg:
+                for dist in self._cache_egg.path.values():
+                    yield dist
+
+    def get_distribution(self, name):
+        """
+        Looks for a named distribution on the path.
+
+        This function only returns the first result found, as no more than one
+        value is expected. If nothing is found, ``None`` is returned.
+
+        :rtype: :class:`InstalledDistribution`, :class:`EggInfoDistribution`
+                or ``None``
+        """
+        result = None
+        name = name.lower()
+        if not self._cache_enabled:
+            for dist in self._yield_distributions():
+                if dist.key == name:
+                    result = dist
+                    break
+        else:
+            self._generate_cache()
+
+            if name in self._cache.name:
+                result = self._cache.name[name][0]
+            elif self._include_egg and name in self._cache_egg.name:
+                result = self._cache_egg.name[name][0]
+        return result
+
+    def provides_distribution(self, name, version=None):
+        """
+        Iterates over all distributions to find which distributions provide *name*.
+        If a *version* is provided, it will be used to filter the results.
+
+        This function only returns the first result found, since no more than
+        one values are expected. If the directory is not found, returns ``None``.
+
+        :parameter version: a version specifier that indicates the version
+                            required, conforming to the format in ``PEP-345``
+
+        :type name: string
+        :type version: string
+        """
+        matcher = None
+        if version is not None:
+            try:
+                matcher = self._scheme.matcher('%s (%s)' % (name, version))
+            except ValueError:
+                raise DistlibException('invalid name or version: %r, %r' %
+                                      (name, version))
+
+        for dist in self.get_distributions():
+            # We hit a problem on Travis where enum34 was installed and doesn't
+            # have a provides attribute ...
+            if not hasattr(dist, 'provides'):
+                logger.debug('No "provides": %s', dist)
+            else:
+                provided = dist.provides
+
+                for p in provided:
+                    p_name, p_ver = parse_name_and_version(p)
+                    if matcher is None:
+                        if p_name == name:
+                            yield dist
+                            break
+                    else:
+                        if p_name == name and matcher.match(p_ver):
+                            yield dist
+                            break
+
+    def get_file_path(self, name, relative_path):
+        """
+        Return the path to a resource file.
+        """
+        dist = self.get_distribution(name)
+        if dist is None:
+            raise LookupError('no distribution named %r found' % name)
+        return dist.get_resource_path(relative_path)
+
+    def get_exported_entries(self, category, name=None):
+        """
+        Return all of the exported entries in a particular category.
+
+        :param category: The category to search for entries.
+        :param name: If specified, only entries with that name are returned.
+        """
+        for dist in self.get_distributions():
+            r = dist.exports
+            if category in r:
+                d = r[category]
+                if name is not None:
+                    if name in d:
+                        yield d[name]
+                else:
+                    for v in d.values():
+                        yield v
+
+
+class Distribution(object):
+    """
+    A base class for distributions, whether installed or from indexes.
+    Either way, it must have some metadata, so that's all that's needed
+    for construction.
+    """
+
+    build_time_dependency = False
+    """
+    Set to True if it's known to be only a build-time dependency (i.e.
+    not needed after installation).
+    """
+
+    requested = False
+    """A boolean that indicates whether the ``REQUESTED`` metadata file is
+    present (in other words, whether the package was installed by user
+    request or it was installed as a dependency)."""
+
+    def __init__(self, metadata):
+        """
+        Initialise an instance.
+        :param metadata: The instance of :class:`Metadata` describing this
+        distribution.
+        """
+        self.metadata = metadata
+        self.name = metadata.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        self.version = metadata.version
+        self.locator = None
+        self.digest = None
+        self.extras = None      # additional features requested
+        self.context = None     # environment marker overrides
+        self.download_urls = set()
+        self.digests = {}
+
+    @property
+    def source_url(self):
+        """
+        The source archive download URL for this distribution.
+        """
+        return self.metadata.source_url
+
+    download_url = source_url   # Backward compatibility
+
+    @property
+    def name_and_version(self):
+        """
+        A utility property which displays the name and version in parentheses.
+        """
+        return '%s (%s)' % (self.name, self.version)
+
+    @property
+    def provides(self):
+        """
+        A set of distribution names and versions provided by this distribution.
+        :return: A set of "name (version)" strings.
+        """
+        plist = self.metadata.provides
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in plist:
+            plist.append(s)
+        return plist
+
+    def _get_requirements(self, req_attr):
+        md = self.metadata
+        reqts = getattr(md, req_attr)
+        logger.debug('%s: got requirements %r from metadata: %r', self.name, req_attr,
+                     reqts)
+        return set(md.get_requirements(reqts, extras=self.extras,
+                                       env=self.context))
+
+    @property
+    def run_requires(self):
+        return self._get_requirements('run_requires')
+
+    @property
+    def meta_requires(self):
+        return self._get_requirements('meta_requires')
+
+    @property
+    def build_requires(self):
+        return self._get_requirements('build_requires')
+
+    @property
+    def test_requires(self):
+        return self._get_requirements('test_requires')
+
+    @property
+    def dev_requires(self):
+        return self._get_requirements('dev_requires')
+
+    def matches_requirement(self, req):
+        """
+        Say if this instance matches (fulfills) a requirement.
+        :param req: The requirement to match.
+        :rtype req: str
+        :return: True if it matches, else False.
+        """
+        # Requirement may contain extras - parse to lose those
+        # from what's passed to the matcher
+        r = parse_requirement(req)
+        scheme = get_scheme(self.metadata.scheme)
+        try:
+            matcher = scheme.matcher(r.requirement)
+        except UnsupportedVersionError:
+            # XXX compat-mode if cannot read the version
+            logger.warning('could not read version %r - using name only',
+                           req)
+            name = req.split()[0]
+            matcher = scheme.matcher(name)
+
+        name = matcher.key   # case-insensitive
+
+        result = False
+        for p in self.provides:
+            p_name, p_ver = parse_name_and_version(p)
+            if p_name != name:
+                continue
+            try:
+                result = matcher.match(p_ver)
+                break
+            except UnsupportedVersionError:
+                pass
+        return result
+
+    def __repr__(self):
+        """
+        Return a textual representation of this instance,
+        """
+        if self.source_url:
+            suffix = ' [%s]' % self.source_url
+        else:
+            suffix = ''
+        return '<Distribution %s (%s)%s>' % (self.name, self.version, suffix)
+
+    def __eq__(self, other):
+        """
+        See if this distribution is the same as another.
+        :param other: The distribution to compare with. To be equal to one
+                      another. distributions must have the same type, name,
+                      version and source_url.
+        :return: True if it is the same, else False.
+        """
+        if type(other) is not type(self):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.version == other.version and
+                      self.source_url == other.source_url)
+        return result
+
+    def __hash__(self):
+        """
+        Compute hash in a way which matches the equality test.
+        """
+        return hash(self.name) + hash(self.version) + hash(self.source_url)
+
+
+class BaseInstalledDistribution(Distribution):
+    """
+    This is the base class for installed distributions (whether PEP 376 or
+    legacy).
+    """
+
+    hasher = None
+
+    def __init__(self, metadata, path, env=None):
+        """
+        Initialise an instance.
+        :param metadata: An instance of :class:`Metadata` which describes the
+                         distribution. This will normally have been initialised
+                         from a metadata file in the ``path``.
+        :param path:     The path of the ``.dist-info`` or ``.egg-info``
+                         directory for the distribution.
+        :param env:      This is normally the :class:`DistributionPath`
+                         instance where this distribution was found.
+        """
+        super(BaseInstalledDistribution, self).__init__(metadata)
+        self.path = path
+        self.dist_path = env
+
+    def get_hash(self, data, hasher=None):
+        """
+        Get the hash of some data, using a particular hash algorithm, if
+        specified.
+
+        :param data: The data to be hashed.
+        :type data: bytes
+        :param hasher: The name of a hash implementation, supported by hashlib,
+                       or ``None``. Examples of valid values are ``'sha1'``,
+                       ``'sha224'``, ``'sha384'``, '``sha256'``, ``'md5'`` and
+                       ``'sha512'``. If no hasher is specified, the ``hasher``
+                       attribute of the :class:`InstalledDistribution` instance
+                       is used. If the hasher is determined to be ``None``, MD5
+                       is used as the hashing algorithm.
+        :returns: The hash of the data. If a hasher was explicitly specified,
+                  the returned hash will be prefixed with the specified hasher
+                  followed by '='.
+        :rtype: str
+        """
+        if hasher is None:
+            hasher = self.hasher
+        if hasher is None:
+            hasher = hashlib.md5
+            prefix = ''
+        else:
+            hasher = getattr(hashlib, hasher)
+            prefix = '%s=' % self.hasher
+        digest = hasher(data).digest()
+        digest = base64.urlsafe_b64encode(digest).rstrip(b'=').decode('ascii')
+        return '%s%s' % (prefix, digest)
+
+
+class InstalledDistribution(BaseInstalledDistribution):
+    """
+    Created with the *path* of the ``.dist-info`` directory provided to the
+    constructor. It reads the metadata contained in ``pydist.json`` when it is
+    instantiated., or uses a passed in Metadata instance (useful for when
+    dry-run mode is being used).
+    """
+
+    hasher = 'sha256'
+
+    def __init__(self, path, metadata=None, env=None):
+        self.modules = []
+        self.finder = finder = resources.finder_for_path(path)
+        if finder is None:
+            raise ValueError('finder unavailable for %s' % path)
+        if env and env._cache_enabled and path in env._cache.path:
+            metadata = env._cache.path[path].metadata
+        elif metadata is None:
+            r = finder.find(METADATA_FILENAME)
+            # Temporary - for Wheel 0.23 support
+            if r is None:
+                r = finder.find(WHEEL_METADATA_FILENAME)
+            # Temporary - for legacy support
+            if r is None:
+                r = finder.find(LEGACY_METADATA_FILENAME)
+            if r is None:
+                raise ValueError('no %s found in %s' % (METADATA_FILENAME,
+                                                        path))
+            with contextlib.closing(r.as_stream()) as stream:
+                metadata = Metadata(fileobj=stream, scheme='legacy')
+
+        super(InstalledDistribution, self).__init__(metadata, path, env)
+
+        if env and env._cache_enabled:
+            env._cache.add(self)
+
+        r = finder.find('REQUESTED')
+        self.requested = r is not None
+        p  = os.path.join(path, 'top_level.txt')
+        if os.path.exists(p):
+            with open(p, 'rb') as f:
+                data = f.read().decode('utf-8')
+            self.modules = data.splitlines()
+
+    def __repr__(self):
+        return '<InstalledDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def _get_records(self):
+        """
+        Get the list of installed files for the distribution
+        :return: A list of tuples of path, hash and size. Note that hash and
+                 size might be ``None`` for some entries. The path is exactly
+                 as stored in the file (which is as in PEP 376).
+        """
+        results = []
+        r = self.get_distinfo_resource('RECORD')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as record_reader:
+                # Base location is parent dir of .dist-info dir
+                #base_location = os.path.dirname(self.path)
+                #base_location = os.path.abspath(base_location)
+                for row in record_reader:
+                    missing = [None for i in range(len(row), 3)]
+                    path, checksum, size = row + missing
+                    #if not os.path.isabs(path):
+                    #    path = path.replace('/', os.sep)
+                    #    path = os.path.join(base_location, path)
+                    results.append((path, checksum, size))
+        return results
+
+    @cached_property
+    def exports(self):
+        """
+        Return the information exported by this distribution.
+        :return: A dictionary of exports, mapping an export category to a dict
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries, and keyed by name.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            result = self.read_exports()
+        return result
+
+    def read_exports(self):
+        """
+        Read exports data from a file in .ini format.
+
+        :return: A dictionary of exports, mapping an export category to a list
+                 of :class:`ExportEntry` instances describing the individual
+                 export entries.
+        """
+        result = {}
+        r = self.get_distinfo_resource(EXPORTS_FILENAME)
+        if r:
+            with contextlib.closing(r.as_stream()) as stream:
+                result = read_exports(stream)
+        return result
+
+    def write_exports(self, exports):
+        """
+        Write a dictionary of exports to a file in .ini format.
+        :param exports: A dictionary of exports, mapping an export category to
+                        a list of :class:`ExportEntry` instances describing the
+                        individual export entries.
+        """
+        rf = self.get_distinfo_file(EXPORTS_FILENAME)
+        with open(rf, 'w') as f:
+            write_exports(exports, f)
+
+    def get_resource_path(self, relative_path):
+        """
+        NOTE: This API may change in the future.
+
+        Return the absolute path to a resource file with the given relative
+        path.
+
+        :param relative_path: The path, relative to .dist-info, of the resource
+                              of interest.
+        :return: The absolute path where the resource is to be found.
+        """
+        r = self.get_distinfo_resource('RESOURCES')
+        with contextlib.closing(r.as_stream()) as stream:
+            with CSVReader(stream=stream) as resources_reader:
+                for relative, destination in resources_reader:
+                    if relative == relative_path:
+                        return destination
+        raise KeyError('no resource file with relative path %r '
+                       'is installed' % relative_path)
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: iterator of (path, hash, size)
+        """
+        for result in self._get_records():
+            yield result
+
+    def write_installed_files(self, paths, prefix, dry_run=False):
+        """
+        Writes the ``RECORD`` file, using the ``paths`` iterable passed in. Any
+        existing ``RECORD`` file is silently overwritten.
+
+        prefix is used to determine when to write absolute paths.
+        """
+        prefix = os.path.join(prefix, '')
+        base = os.path.dirname(self.path)
+        base_under_prefix = base.startswith(prefix)
+        base = os.path.join(base, '')
+        record_path = self.get_distinfo_file('RECORD')
+        logger.info('creating %s', record_path)
+        if dry_run:
+            return None
+        with CSVWriter(record_path) as writer:
+            for path in paths:
+                if os.path.isdir(path) or path.endswith(('.pyc', '.pyo')):
+                    # do not put size and hash, as in PEP-376
+                    hash_value = size = ''
+                else:
+                    size = '%d' % os.path.getsize(path)
+                    with open(path, 'rb') as fp:
+                        hash_value = self.get_hash(fp.read())
+                if path.startswith(base) or (base_under_prefix and
+                                             path.startswith(prefix)):
+                    path = os.path.relpath(path, base)
+                writer.writerow((path, hash_value, size))
+
+            # add the RECORD file itself
+            if record_path.startswith(base):
+                record_path = os.path.relpath(record_path, base)
+            writer.writerow((record_path, '', ''))
+        return record_path
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        base = os.path.dirname(self.path)
+        record_path = self.get_distinfo_file('RECORD')
+        for path, hash_value, size in self.list_installed_files():
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path == record_path:
+                continue
+            if not os.path.exists(path):
+                mismatches.append((path, 'exists', True, False))
+            elif os.path.isfile(path):
+                actual_size = str(os.path.getsize(path))
+                if size and actual_size != size:
+                    mismatches.append((path, 'size', size, actual_size))
+                elif hash_value:
+                    if '=' in hash_value:
+                        hasher = hash_value.split('=', 1)[0]
+                    else:
+                        hasher = None
+
+                    with open(path, 'rb') as f:
+                        actual_hash = self.get_hash(f.read(), hasher)
+                        if actual_hash != hash_value:
+                            mismatches.append((path, 'hash', hash_value, actual_hash))
+        return mismatches
+
+    @cached_property
+    def shared_locations(self):
+        """
+        A dictionary of shared locations whose keys are in the set 'prefix',
+        'purelib', 'platlib', 'scripts', 'headers', 'data' and 'namespace'.
+        The corresponding value is the absolute path of that category for
+        this distribution, and takes into account any paths selected by the
+        user at installation time (e.g. via command-line arguments). In the
+        case of the 'namespace' key, this would be a list of absolute paths
+        for the roots of namespace packages in this distribution.
+
+        The first time this property is accessed, the relevant information is
+        read from the SHARED file in the .dist-info directory.
+        """
+        result = {}
+        shared_path = os.path.join(self.path, 'SHARED')
+        if os.path.isfile(shared_path):
+            with codecs.open(shared_path, 'r', encoding='utf-8') as f:
+                lines = f.read().splitlines()
+            for line in lines:
+                key, value = line.split('=', 1)
+                if key == 'namespace':
+                    result.setdefault(key, []).append(value)
+                else:
+                    result[key] = value
+        return result
+
+    def write_shared_locations(self, paths, dry_run=False):
+        """
+        Write shared location information to the SHARED file in .dist-info.
+        :param paths: A dictionary as described in the documentation for
+        :meth:`shared_locations`.
+        :param dry_run: If True, the action is logged but no file is actually
+                        written.
+        :return: The path of the file written to.
+        """
+        shared_path = os.path.join(self.path, 'SHARED')
+        logger.info('creating %s', shared_path)
+        if dry_run:
+            return None
+        lines = []
+        for key in ('prefix', 'lib', 'headers', 'scripts', 'data'):
+            path = paths[key]
+            if os.path.isdir(paths[key]):
+                lines.append('%s=%s' % (key,  path))
+        for ns in paths.get('namespace', ()):
+            lines.append('namespace=%s' % ns)
+
+        with codecs.open(shared_path, 'w', encoding='utf-8') as f:
+            f.write('\n'.join(lines))
+        return shared_path
+
+    def get_distinfo_resource(self, path):
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+        finder = resources.finder_for_path(self.path)
+        if finder is None:
+            raise DistlibException('Unable to get a finder for %s' % self.path)
+        return finder.find(path)
+
+    def get_distinfo_file(self, path):
+        """
+        Returns a path located under the ``.dist-info`` directory. Returns a
+        string representing the path.
+
+        :parameter path: a ``'/'``-separated path relative to the
+                         ``.dist-info`` directory or an absolute path;
+                         If *path* is an absolute path and doesn't start
+                         with the ``.dist-info`` directory path,
+                         a :class:`DistlibException` is raised
+        :type path: str
+        :rtype: str
+        """
+        # Check if it is an absolute path  # XXX use relpath, add tests
+        if path.find(os.sep) >= 0:
+            # it's an absolute path?
+            distinfo_dirname, path = path.split(os.sep)[-2:]
+            if distinfo_dirname != self.path.split(os.sep)[-1]:
+                raise DistlibException(
+                    'dist-info file %r does not belong to the %r %s '
+                    'distribution' % (path, self.name, self.version))
+
+        # The file must be relative
+        if path not in DIST_FILES:
+            raise DistlibException('invalid path for a dist-info file: '
+                                   '%r at %r' % (path, self.path))
+
+        return os.path.join(self.path, path)
+
+    def list_distinfo_files(self):
+        """
+        Iterates over the ``RECORD`` entries and returns paths for each line if
+        the path is pointing to a file located in the ``.dist-info`` directory
+        or one of its subdirectories.
+
+        :returns: iterator of paths
+        """
+        base = os.path.dirname(self.path)
+        for path, checksum, size in self._get_records():
+            # XXX add separator or use real relpath algo
+            if not os.path.isabs(path):
+                path = os.path.join(base, path)
+            if path.startswith(self.path):
+                yield path
+
+    def __eq__(self, other):
+        return (isinstance(other, InstalledDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+
+class EggInfoDistribution(BaseInstalledDistribution):
+    """Created with the *path* of the ``.egg-info`` directory or file provided
+    to the constructor. It reads the metadata contained in the file itself, or
+    if the given path happens to be a directory, the metadata is read from the
+    file ``PKG-INFO`` under that directory."""
+
+    requested = True    # as we have no way of knowing, assume it was
+    shared_locations = {}
+
+    def __init__(self, path, env=None):
+        def set_name_and_version(s, n, v):
+            s.name = n
+            s.key = n.lower()   # for case-insensitive comparisons
+            s.version = v
+
+        self.path = path
+        self.dist_path = env
+        if env and env._cache_enabled and path in env._cache_egg.path:
+            metadata = env._cache_egg.path[path].metadata
+            set_name_and_version(self, metadata.name, metadata.version)
+        else:
+            metadata = self._get_metadata(path)
+
+            # Need to be set before caching
+            set_name_and_version(self, metadata.name, metadata.version)
+
+            if env and env._cache_enabled:
+                env._cache_egg.add(self)
+        super(EggInfoDistribution, self).__init__(metadata, path, env)
+
+    def _get_metadata(self, path):
+        requires = None
+
+        def parse_requires_data(data):
+            """Create a list of dependencies from a requires.txt file.
+
+            *data*: the contents of a setuptools-produced requires.txt file.
+            """
+            reqs = []
+            lines = data.splitlines()
+            for line in lines:
+                line = line.strip()
+                if line.startswith('['):
+                    logger.warning('Unexpected line: quitting requirement scan: %r',
+                                   line)
+                    break
+                r = parse_requirement(line)
+                if not r:
+                    logger.warning('Not recognised as a requirement: %r', line)
+                    continue
+                if r.extras:
+                    logger.warning('extra requirements in requires.txt are '
+                                   'not supported')
+                if not r.constraints:
+                    reqs.append(r.name)
+                else:
+                    cons = ', '.join('%s%s' % c for c in r.constraints)
+                    reqs.append('%s (%s)' % (r.name, cons))
+            return reqs
+
+        def parse_requires_path(req_path):
+            """Create a list of dependencies from a requires.txt file.
+
+            *req_path*: the path to a setuptools-produced requires.txt file.
+            """
+
+            reqs = []
+            try:
+                with codecs.open(req_path, 'r', 'utf-8') as fp:
+                    reqs = parse_requires_data(fp.read())
+            except IOError:
+                pass
+            return reqs
+
+        tl_path = tl_data = None
+        if path.endswith('.egg'):
+            if os.path.isdir(path):
+                p = os.path.join(path, 'EGG-INFO')
+                meta_path = os.path.join(p, 'PKG-INFO')
+                metadata = Metadata(path=meta_path, scheme='legacy')
+                req_path = os.path.join(p, 'requires.txt')
+                tl_path = os.path.join(p, 'top_level.txt')
+                requires = parse_requires_path(req_path)
+            else:
+                # FIXME handle the case where zipfile is not available
+                zipf = zipimport.zipimporter(path)
+                fileobj = StringIO(
+                    zipf.get_data('EGG-INFO/PKG-INFO').decode('utf8'))
+                metadata = Metadata(fileobj=fileobj, scheme='legacy')
+                try:
+                    data = zipf.get_data('EGG-INFO/requires.txt')
+                    tl_data = zipf.get_data('EGG-INFO/top_level.txt').decode('utf-8')
+                    requires = parse_requires_data(data.decode('utf-8'))
+                except IOError:
+                    requires = None
+        elif path.endswith('.egg-info'):
+            if os.path.isdir(path):
+                req_path = os.path.join(path, 'requires.txt')
+                requires = parse_requires_path(req_path)
+                path = os.path.join(path, 'PKG-INFO')
+                tl_path = os.path.join(path, 'top_level.txt')
+            metadata = Metadata(path=path, scheme='legacy')
+        else:
+            raise DistlibException('path must end with .egg-info or .egg, '
+                                   'got %r' % path)
+
+        if requires:
+            metadata.add_requirements(requires)
+        # look for top-level modules in top_level.txt, if present
+        if tl_data is None:
+            if tl_path is not None and os.path.exists(tl_path):
+                with open(tl_path, 'rb') as f:
+                    tl_data = f.read().decode('utf-8')
+        if not tl_data:
+            tl_data = []
+        else:
+            tl_data = tl_data.splitlines()
+        self.modules = tl_data
+        return metadata
+
+    def __repr__(self):
+        return '<EggInfoDistribution %r %s at %r>' % (
+            self.name, self.version, self.path)
+
+    def __str__(self):
+        return "%s %s" % (self.name, self.version)
+
+    def check_installed_files(self):
+        """
+        Checks that the hashes and sizes of the files in ``RECORD`` are
+        matched by the files themselves. Returns a (possibly empty) list of
+        mismatches. Each entry in the mismatch list will be a tuple consisting
+        of the path, 'exists', 'size' or 'hash' according to what didn't match
+        (existence is checked first, then size, then hash), the expected
+        value and the actual value.
+        """
+        mismatches = []
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            for path, _, _ in self.list_installed_files():
+                if path == record_path:
+                    continue
+                if not os.path.exists(path):
+                    mismatches.append((path, 'exists', True, False))
+        return mismatches
+
+    def list_installed_files(self):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns a tuple
+        ``(path, hash, size)`` for each line.
+
+        :returns: a list of (path, hash, size)
+        """
+
+        def _md5(path):
+            f = open(path, 'rb')
+            try:
+                content = f.read()
+            finally:
+                f.close()
+            return hashlib.md5(content).hexdigest()
+
+        def _size(path):
+            return os.stat(path).st_size
+
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        result = []
+        if os.path.exists(record_path):
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    p = os.path.normpath(os.path.join(self.path, line))
+                    # "./" is present as a marker between installed files
+                    # and installation metadata files
+                    if not os.path.exists(p):
+                        logger.warning('Non-existent file: %s', p)
+                        if p.endswith(('.pyc', '.pyo')):
+                            continue
+                        #otherwise fall through and fail
+                    if not os.path.isdir(p):
+                        result.append((p, _md5(p), _size(p)))
+            result.append((record_path, None, None))
+        return result
+
+    def list_distinfo_files(self, absolute=False):
+        """
+        Iterates over the ``installed-files.txt`` entries and returns paths for
+        each line if the path is pointing to a file located in the
+        ``.egg-info`` directory or one of its subdirectories.
+
+        :parameter absolute: If *absolute* is ``True``, each returned path is
+                          transformed into a local absolute path. Otherwise the
+                          raw value from ``installed-files.txt`` is returned.
+        :type absolute: boolean
+        :returns: iterator of paths
+        """
+        record_path = os.path.join(self.path, 'installed-files.txt')
+        if os.path.exists(record_path):
+            skip = True
+            with codecs.open(record_path, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    if line == './':
+                        skip = False
+                        continue
+                    if not skip:
+                        p = os.path.normpath(os.path.join(self.path, line))
+                        if p.startswith(self.path):
+                            if absolute:
+                                yield p
+                            else:
+                                yield line
+
+    def __eq__(self, other):
+        return (isinstance(other, EggInfoDistribution) and
+                self.path == other.path)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    __hash__ = object.__hash__
+
+new_dist_class = InstalledDistribution
+old_dist_class = EggInfoDistribution
+
+
+class DependencyGraph(object):
+    """
+    Represents a dependency graph between distributions.
+
+    The dependency relationships are stored in an ``adjacency_list`` that maps
+    distributions to a list of ``(other, label)`` tuples where  ``other``
+    is a distribution and the edge is labeled with ``label`` (i.e. the version
+    specifier, if such was provided). Also, for more efficient traversal, for
+    every distribution ``x``, a list of predecessors is kept in
+    ``reverse_list[x]``. An edge from distribution ``a`` to
+    distribution ``b`` means that ``a`` depends on ``b``. If any missing
+    dependencies are found, they are stored in ``missing``, which is a
+    dictionary that maps distributions to a list of requirements that were not
+    provided by any other distributions.
+    """
+
+    def __init__(self):
+        self.adjacency_list = {}
+        self.reverse_list = {}
+        self.missing = {}
+
+    def add_distribution(self, distribution):
+        """Add the *distribution* to the graph.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        """
+        self.adjacency_list[distribution] = []
+        self.reverse_list[distribution] = []
+        #self.missing[distribution] = []
+
+    def add_edge(self, x, y, label=None):
+        """Add an edge from distribution *x* to distribution *y* with the given
+        *label*.
+
+        :type x: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type y: :class:`distutils2.database.InstalledDistribution` or
+                 :class:`distutils2.database.EggInfoDistribution`
+        :type label: ``str`` or ``None``
+        """
+        self.adjacency_list[x].append((y, label))
+        # multiple edges are allowed, so be careful
+        if x not in self.reverse_list[y]:
+            self.reverse_list[y].append(x)
+
+    def add_missing(self, distribution, requirement):
+        """
+        Add a missing *requirement* for the given *distribution*.
+
+        :type distribution: :class:`distutils2.database.InstalledDistribution`
+                            or :class:`distutils2.database.EggInfoDistribution`
+        :type requirement: ``str``
+        """
+        logger.debug('%s missing %r', distribution, requirement)
+        self.missing.setdefault(distribution, []).append(requirement)
+
+    def _repr_dist(self, dist):
+        return '%s %s' % (dist.name, dist.version)
+
+    def repr_node(self, dist, level=1):
+        """Prints only a subgraph"""
+        output = [self._repr_dist(dist)]
+        for other, label in self.adjacency_list[dist]:
+            dist = self._repr_dist(other)
+            if label is not None:
+                dist = '%s [%s]' % (dist, label)
+            output.append('    ' * level + str(dist))
+            suboutput = self.repr_node(other, level + 1)
+            subs = suboutput.split('\n')
+            output.extend(subs[1:])
+        return '\n'.join(output)
+
+    def to_dot(self, f, skip_disconnected=True):
+        """Writes a DOT output for the graph to the provided file *f*.
+
+        If *skip_disconnected* is set to ``True``, then all distributions
+        that are not dependent on any other distribution are skipped.
+
+        :type f: has to support ``file``-like operations
+        :type skip_disconnected: ``bool``
+        """
+        disconnected = []
+
+        f.write("digraph dependencies {\n")
+        for dist, adjs in self.adjacency_list.items():
+            if len(adjs) == 0 and not skip_disconnected:
+                disconnected.append(dist)
+            for other, label in adjs:
+                if not label is None:
+                    f.write('"%s" -> "%s" [label="%s"]\n' %
+                            (dist.name, other.name, label))
+                else:
+                    f.write('"%s" -> "%s"\n' % (dist.name, other.name))
+        if not skip_disconnected and len(disconnected) > 0:
+            f.write('subgraph disconnected {\n')
+            f.write('label = "Disconnected"\n')
+            f.write('bgcolor = red\n')
+
+            for dist in disconnected:
+                f.write('"%s"' % dist.name)
+                f.write('\n')
+            f.write('}\n')
+        f.write('}\n')
+
+    def topological_sort(self):
+        """
+        Perform a topological sort of the graph.
+        :return: A tuple, the first element of which is a topologically sorted
+                 list of distributions, and the second element of which is a
+                 list of distributions that cannot be sorted because they have
+                 circular dependencies and so form a cycle.
+        """
+        result = []
+        # Make a shallow copy of the adjacency list
+        alist = {}
+        for k, v in self.adjacency_list.items():
+            alist[k] = v[:]
+        while True:
+            # See what we can remove in this run
+            to_remove = []
+            for k, v in list(alist.items())[:]:
+                if not v:
+                    to_remove.append(k)
+                    del alist[k]
+            if not to_remove:
+                # What's left in alist (if anything) is a cycle.
+                break
+            # Remove from the adjacency list of others
+            for k, v in alist.items():
+                alist[k] = [(d, r) for d, r in v if d not in to_remove]
+            logger.debug('Moving to result: %s',
+                         ['%s (%s)' % (d.name, d.version) for d in to_remove])
+            result.extend(to_remove)
+        return result, list(alist.keys())
+
+    def __repr__(self):
+        """Representation of the graph"""
+        output = []
+        for dist, adjs in self.adjacency_list.items():
+            output.append(self.repr_node(dist))
+        return '\n'.join(output)
+
+
+def make_graph(dists, scheme='default'):
+    """Makes a dependency graph from the given distributions.
+
+    :parameter dists: a list of distributions
+    :type dists: list of :class:`distutils2.database.InstalledDistribution` and
+                 :class:`distutils2.database.EggInfoDistribution` instances
+    :rtype: a :class:`DependencyGraph` instance
+    """
+    scheme = get_scheme(scheme)
+    graph = DependencyGraph()
+    provided = {}  # maps names to lists of (version, dist) tuples
+
+    # first, build the graph and find out what's provided
+    for dist in dists:
+        graph.add_distribution(dist)
+
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            provided.setdefault(name, []).append((version, dist))
+
+    # now make the edges
+    for dist in dists:
+        requires = (dist.run_requires | dist.meta_requires |
+                    dist.build_requires | dist.dev_requires)
+        for req in requires:
+            try:
+                matcher = scheme.matcher(req)
+            except UnsupportedVersionError:
+                # XXX compat-mode if cannot read the version
+                logger.warning('could not read version %r - using name only',
+                               req)
+                name = req.split()[0]
+                matcher = scheme.matcher(name)
+
+            name = matcher.key   # case-insensitive
+
+            matched = False
+            if name in provided:
+                for version, provider in provided[name]:
+                    try:
+                        match = matcher.match(version)
+                    except UnsupportedVersionError:
+                        match = False
+
+                    if match:
+                        graph.add_edge(dist, provider, req)
+                        matched = True
+                        break
+            if not matched:
+                graph.add_missing(dist, req)
+    return graph
+
+
+def get_dependent_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    dependent on *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    dep = [dist]  # dependent distributions
+    todo = graph.reverse_list[dist]  # list of nodes we should inspect
+
+    while todo:
+        d = todo.pop()
+        dep.append(d)
+        for succ in graph.reverse_list[d]:
+            if succ not in dep:
+                todo.append(succ)
+
+    dep.pop(0)  # remove dist from dep, was there to prevent infinite loops
+    return dep
+
+
+def get_required_dists(dists, dist):
+    """Recursively generate a list of distributions from *dists* that are
+    required by *dist*.
+
+    :param dists: a list of distributions
+    :param dist: a distribution, member of *dists* for which we are interested
+                 in finding the dependencies.
+    """
+    if dist not in dists:
+        raise DistlibException('given distribution %r is not a member '
+                               'of the list' % dist.name)
+    graph = make_graph(dists)
+
+    req = set()  # required distributions
+    todo = graph.adjacency_list[dist]  # list of nodes we should inspect
+    seen = set(t[0] for t in todo) # already added to todo
+
+    while todo:
+        d = todo.pop()[0]
+        req.add(d)
+        pred_list = graph.adjacency_list[d]
+        for pred in pred_list:
+            d = pred[0]
+            if d not in req and d not in seen:
+                seen.add(d)
+                todo.append(pred)
+    return req
+
+
+def make_dist(name, version, **kwargs):
+    """
+    A convenience method for making a dist given just a name and version.
+    """
+    summary = kwargs.pop('summary', 'Placeholder for summary')
+    md = Metadata(**kwargs)
+    md.name = name
+    md.version = version
+    md.summary = summary or 'Placeholder for summary'
+    return Distribution(md)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/index.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/index.py
new file mode 100644
index 0000000..9b6d129
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/index.py
@@ -0,0 +1,508 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import hashlib
+import logging
+import os
+import shutil
+import subprocess
+import tempfile
+try:
+    from threading import Thread
+except ImportError:  # pragma: no cover
+    from dummy_threading import Thread
+
+from . import DistlibException
+from .compat import (HTTPBasicAuthHandler, Request, HTTPPasswordMgr,
+                     urlparse, build_opener, string_types)
+from .util import zip_dir, ServerProxy
+
+logger = logging.getLogger(__name__)
+
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+DEFAULT_REALM = 'pypi'
+
+class PackageIndex(object):
+    """
+    This class represents a package index compatible with PyPI, the Python
+    Package Index.
+    """
+
+    boundary = b'----------ThIs_Is_tHe_distlib_index_bouNdaRY_$'
+
+    def __init__(self, url=None):
+        """
+        Initialise an instance.
+
+        :param url: The URL of the index. If not specified, the URL for PyPI is
+                    used.
+        """
+        self.url = url or DEFAULT_INDEX
+        self.read_configuration()
+        scheme, netloc, path, params, query, frag = urlparse(self.url)
+        if params or query or frag or scheme not in ('http', 'https'):
+            raise DistlibException('invalid repository: %s' % self.url)
+        self.password_handler = None
+        self.ssl_verifier = None
+        self.gpg = None
+        self.gpg_home = None
+        with open(os.devnull, 'w') as sink:
+            # Use gpg by default rather than gpg2, as gpg2 insists on
+            # prompting for passwords
+            for s in ('gpg', 'gpg2'):
+                try:
+                    rc = subprocess.check_call([s, '--version'], stdout=sink,
+                                               stderr=sink)
+                    if rc == 0:
+                        self.gpg = s
+                        break
+                except OSError:
+                    pass
+
+    def _get_pypirc_command(self):
+        """
+        Get the distutils command for interacting with PyPI configurations.
+        :return: the command.
+        """
+        from .util import _get_pypirc_command as cmd
+        return cmd()
+
+    def read_configuration(self):
+        """
+        Read the PyPI access configuration as supported by distutils. This populates
+        ``username``, ``password``, ``realm`` and ``url`` attributes from the
+        configuration.
+        """
+        from .util import _load_pypirc
+        cfg = _load_pypirc(self)
+        self.username = cfg.get('username')
+        self.password = cfg.get('password')
+        self.realm = cfg.get('realm', 'pypi')
+        self.url = cfg.get('repository', self.url)
+
+    def save_configuration(self):
+        """
+        Save the PyPI access configuration. You must have set ``username`` and
+        ``password`` attributes before calling this method.
+        """
+        self.check_credentials()
+        from .util import _store_pypirc
+        _store_pypirc(self)
+
+    def check_credentials(self):
+        """
+        Check that ``username`` and ``password`` have been set, and raise an
+        exception if not.
+        """
+        if self.username is None or self.password is None:
+            raise DistlibException('username and password must be set')
+        pm = HTTPPasswordMgr()
+        _, netloc, _, _, _, _ = urlparse(self.url)
+        pm.add_password(self.realm, netloc, self.username, self.password)
+        self.password_handler = HTTPBasicAuthHandler(pm)
+
+    def register(self, metadata):  # pragma: no cover
+        """
+        Register a distribution on PyPI, using the provided metadata.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the distribution to be
+                         registered.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        metadata.validate()
+        d = metadata.todict()
+        d[':action'] = 'verify'
+        request = self.encode_request(d.items(), [])
+        response = self.send_request(request)
+        d[':action'] = 'submit'
+        request = self.encode_request(d.items(), [])
+        return self.send_request(request)
+
+    def _reader(self, name, stream, outbuf):
+        """
+        Thread runner for reading lines of from a subprocess into a buffer.
+
+        :param name: The logical name of the stream (used for logging only).
+        :param stream: The stream to read from. This will typically a pipe
+                       connected to the output stream of a subprocess.
+        :param outbuf: The list to append the read lines to.
+        """
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            s = s.decode('utf-8').rstrip()
+            outbuf.append(s)
+            logger.debug('%s: %s' % (name, s))
+        stream.close()
+
+    def get_sign_command(self, filename, signer, sign_password, keystore=None):  # pragma: no cover
+        """
+        Return a suitable command for signing a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The signing command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        if sign_password is not None:
+            cmd.extend(['--batch', '--passphrase-fd', '0'])
+        td = tempfile.mkdtemp()
+        sf = os.path.join(td, os.path.basename(filename) + '.asc')
+        cmd.extend(['--detach-sign', '--armor', '--local-user',
+                    signer, '--output', sf, filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd, sf
+
+    def run_command(self, cmd, input_data=None):
+        """
+        Run a command in a child process , passing it any input data specified.
+
+        :param cmd: The command to run.
+        :param input_data: If specified, this must be a byte string containing
+                           data to be sent to the child process.
+        :return: A tuple consisting of the subprocess' exit code, a list of
+                 lines read from the subprocess' ``stdout``, and a list of
+                 lines read from the subprocess' ``stderr``.
+        """
+        kwargs = {
+            'stdout': subprocess.PIPE,
+            'stderr': subprocess.PIPE,
+        }
+        if input_data is not None:
+            kwargs['stdin'] = subprocess.PIPE
+        stdout = []
+        stderr = []
+        p = subprocess.Popen(cmd, **kwargs)
+        # We don't use communicate() here because we may need to
+        # get clever with interacting with the command
+        t1 = Thread(target=self._reader, args=('stdout', p.stdout, stdout))
+        t1.start()
+        t2 = Thread(target=self._reader, args=('stderr', p.stderr, stderr))
+        t2.start()
+        if input_data is not None:
+            p.stdin.write(input_data)
+            p.stdin.close()
+
+        p.wait()
+        t1.join()
+        t2.join()
+        return p.returncode, stdout, stderr
+
+    def sign_file(self, filename, signer, sign_password, keystore=None):  # pragma: no cover
+        """
+        Sign a file.
+
+        :param filename: The pathname to the file to be signed.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The absolute pathname of the file where the signature is
+                 stored.
+        """
+        cmd, sig_file = self.get_sign_command(filename, signer, sign_password,
+                                              keystore)
+        rc, stdout, stderr = self.run_command(cmd,
+                                              sign_password.encode('utf-8'))
+        if rc != 0:
+            raise DistlibException('sign command failed with error '
+                                   'code %s' % rc)
+        return sig_file
+
+    def upload_file(self, metadata, filename, signer=None, sign_password=None,
+                    filetype='sdist', pyversion='source', keystore=None):
+        """
+        Upload a release file to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the file to be uploaded.
+        :param filename: The pathname of the file to be uploaded.
+        :param signer: The identifier of the signer of the file.
+        :param sign_password: The passphrase for the signer's
+                              private key used for signing.
+        :param filetype: The type of the file being uploaded. This is the
+                        distutils command which produced that file, e.g.
+                        ``sdist`` or ``bdist_wheel``.
+        :param pyversion: The version of Python which the release relates
+                          to. For code compatible with any Python, this would
+                          be ``source``, otherwise it would be e.g. ``3.2``.
+        :param keystore: The path to a directory which contains the keys
+                         used in signing. If not specified, the instance's
+                         ``gpg_home`` attribute is used instead.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.exists(filename):
+            raise DistlibException('not found: %s' % filename)
+        metadata.validate()
+        d = metadata.todict()
+        sig_file = None
+        if signer:
+            if not self.gpg:
+                logger.warning('no signing program available - not signed')
+            else:
+                sig_file = self.sign_file(filename, signer, sign_password,
+                                          keystore)
+        with open(filename, 'rb') as f:
+            file_data = f.read()
+        md5_digest = hashlib.md5(file_data).hexdigest()
+        sha256_digest = hashlib.sha256(file_data).hexdigest()
+        d.update({
+            ':action': 'file_upload',
+            'protocol_version': '1',
+            'filetype': filetype,
+            'pyversion': pyversion,
+            'md5_digest': md5_digest,
+            'sha256_digest': sha256_digest,
+        })
+        files = [('content', os.path.basename(filename), file_data)]
+        if sig_file:
+            with open(sig_file, 'rb') as f:
+                sig_data = f.read()
+            files.append(('gpg_signature', os.path.basename(sig_file),
+                         sig_data))
+            shutil.rmtree(os.path.dirname(sig_file))
+        request = self.encode_request(d.items(), files)
+        return self.send_request(request)
+
+    def upload_documentation(self, metadata, doc_dir):  # pragma: no cover
+        """
+        Upload documentation to the index.
+
+        :param metadata: A :class:`Metadata` instance defining at least a name
+                         and version number for the documentation to be
+                         uploaded.
+        :param doc_dir: The pathname of the directory which contains the
+                        documentation. This should be the directory that
+                        contains the ``index.html`` for the documentation.
+        :return: The HTTP response received from PyPI upon submission of the
+                request.
+        """
+        self.check_credentials()
+        if not os.path.isdir(doc_dir):
+            raise DistlibException('not a directory: %r' % doc_dir)
+        fn = os.path.join(doc_dir, 'index.html')
+        if not os.path.exists(fn):
+            raise DistlibException('not found: %r' % fn)
+        metadata.validate()
+        name, version = metadata.name, metadata.version
+        zip_data = zip_dir(doc_dir).getvalue()
+        fields = [(':action', 'doc_upload'),
+                  ('name', name), ('version', version)]
+        files = [('content', name, zip_data)]
+        request = self.encode_request(fields, files)
+        return self.send_request(request)
+
+    def get_verify_command(self, signature_filename, data_filename,
+                           keystore=None):
+        """
+        Return a suitable command for verifying a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: The verifying command as a list suitable to be
+                 passed to :class:`subprocess.Popen`.
+        """
+        cmd = [self.gpg, '--status-fd', '2', '--no-tty']
+        if keystore is None:
+            keystore = self.gpg_home
+        if keystore:
+            cmd.extend(['--homedir', keystore])
+        cmd.extend(['--verify', signature_filename, data_filename])
+        logger.debug('invoking: %s', ' '.join(cmd))
+        return cmd
+
+    def verify_signature(self, signature_filename, data_filename,
+                         keystore=None):
+        """
+        Verify a signature for a file.
+
+        :param signature_filename: The pathname to the file containing the
+                                   signature.
+        :param data_filename: The pathname to the file containing the
+                              signed data.
+        :param keystore: The path to a directory which contains the keys
+                         used in verification. If not specified, the
+                         instance's ``gpg_home`` attribute is used instead.
+        :return: True if the signature was verified, else False.
+        """
+        if not self.gpg:
+            raise DistlibException('verification unavailable because gpg '
+                                   'unavailable')
+        cmd = self.get_verify_command(signature_filename, data_filename,
+                                      keystore)
+        rc, stdout, stderr = self.run_command(cmd)
+        if rc not in (0, 1):
+            raise DistlibException('verify command failed with error '
+                             'code %s' % rc)
+        return rc == 0
+
+    def download_file(self, url, destfile, digest=None, reporthook=None):
+        """
+        This is a convenience method for downloading a file from an URL.
+        Normally, this will be a file from the index, though currently
+        no check is made for this (i.e. a file can be downloaded from
+        anywhere).
+
+        The method is just like the :func:`urlretrieve` function in the
+        standard library, except that it allows digest computation to be
+        done during download and checking that the downloaded data
+        matched any expected value.
+
+        :param url: The URL of the file to be downloaded (assumed to be
+                    available via an HTTP GET request).
+        :param destfile: The pathname where the downloaded file is to be
+                         saved.
+        :param digest: If specified, this must be a (hasher, value)
+                       tuple, where hasher is the algorithm used (e.g.
+                       ``'md5'``) and ``value`` is the expected value.
+        :param reporthook: The same as for :func:`urlretrieve` in the
+                           standard library.
+        """
+        if digest is None:
+            digester = None
+            logger.debug('No digest specified')
+        else:
+            if isinstance(digest, (list, tuple)):
+                hasher, digest = digest
+            else:
+                hasher = 'md5'
+            digester = getattr(hashlib, hasher)()
+            logger.debug('Digest specified: %s' % digest)
+        # The following code is equivalent to urlretrieve.
+        # We need to do it this way so that we can compute the
+        # digest of the file as we go.
+        with open(destfile, 'wb') as dfp:
+            # addinfourl is not a context manager on 2.x
+            # so we have to use try/finally
+            sfp = self.send_request(Request(url))
+            try:
+                headers = sfp.info()
+                blocksize = 8192
+                size = -1
+                read = 0
+                blocknum = 0
+                if "content-length" in headers:
+                    size = int(headers["Content-Length"])
+                if reporthook:
+                    reporthook(blocknum, blocksize, size)
+                while True:
+                    block = sfp.read(blocksize)
+                    if not block:
+                        break
+                    read += len(block)
+                    dfp.write(block)
+                    if digester:
+                        digester.update(block)
+                    blocknum += 1
+                    if reporthook:
+                        reporthook(blocknum, blocksize, size)
+            finally:
+                sfp.close()
+
+        # check that we got the whole file, if we can
+        if size >= 0 and read < size:
+            raise DistlibException(
+                'retrieval incomplete: got only %d out of %d bytes'
+                % (read, size))
+        # if we have a digest, it must match.
+        if digester:
+            actual = digester.hexdigest()
+            if digest != actual:
+                raise DistlibException('%s digest mismatch for %s: expected '
+                                       '%s, got %s' % (hasher, destfile,
+                                                       digest, actual))
+            logger.debug('Digest verified: %s', digest)
+
+    def send_request(self, req):
+        """
+        Send a standard library :class:`Request` to PyPI and return its
+        response.
+
+        :param req: The request to send.
+        :return: The HTTP response from PyPI (a standard library HTTPResponse).
+        """
+        handlers = []
+        if self.password_handler:
+            handlers.append(self.password_handler)
+        if self.ssl_verifier:
+            handlers.append(self.ssl_verifier)
+        opener = build_opener(*handlers)
+        return opener.open(req)
+
+    def encode_request(self, fields, files):
+        """
+        Encode fields and files for posting to an HTTP server.
+
+        :param fields: The fields to send as a list of (fieldname, value)
+                       tuples.
+        :param files: The files to send as a list of (fieldname, filename,
+                      file_bytes) tuple.
+        """
+        # Adapted from packaging, which in turn was adapted from
+        # http://code.activestate.com/recipes/146306
+
+        parts = []
+        boundary = self.boundary
+        for k, values in fields:
+            if not isinstance(values, (list, tuple)):
+                values = [values]
+
+            for v in values:
+                parts.extend((
+                    b'--' + boundary,
+                    ('Content-Disposition: form-data; name="%s"' %
+                     k).encode('utf-8'),
+                    b'',
+                    v.encode('utf-8')))
+        for key, filename, value in files:
+            parts.extend((
+                b'--' + boundary,
+                ('Content-Disposition: form-data; name="%s"; filename="%s"' %
+                 (key, filename)).encode('utf-8'),
+                b'',
+                value))
+
+        parts.extend((b'--' + boundary + b'--', b''))
+
+        body = b'\r\n'.join(parts)
+        ct = b'multipart/form-data; boundary=' + boundary
+        headers = {
+            'Content-type': ct,
+            'Content-length': str(len(body))
+        }
+        return Request(self.url, body, headers)
+
+    def search(self, terms, operator=None):  # pragma: no cover
+        if isinstance(terms, string_types):
+            terms = {'name': terms}
+        rpc_proxy = ServerProxy(self.url, timeout=3.0)
+        try:
+            return rpc_proxy.search(terms, operator or 'and')
+        finally:
+            rpc_proxy('close')()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/locators.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/locators.py
new file mode 100644
index 0000000..966ebc0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/locators.py
@@ -0,0 +1,1300 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+
+import gzip
+from io import BytesIO
+import json
+import logging
+import os
+import posixpath
+import re
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import zlib
+
+from . import DistlibException
+from .compat import (urljoin, urlparse, urlunparse, url2pathname, pathname2url,
+                     queue, quote, unescape, build_opener,
+                     HTTPRedirectHandler as BaseRedirectHandler, text_type,
+                     Request, HTTPError, URLError)
+from .database import Distribution, DistributionPath, make_dist
+from .metadata import Metadata, MetadataInvalidError
+from .util import (cached_property, ensure_slash, split_filename, get_project_data,
+                   parse_requirement, parse_name_and_version, ServerProxy,
+                   normalize_name)
+from .version import get_scheme, UnsupportedVersionError
+from .wheel import Wheel, is_compatible
+
+logger = logging.getLogger(__name__)
+
+HASHER_HASH = re.compile(r'^(\w+)=([a-f0-9]+)')
+CHARSET = re.compile(r';\s*charset\s*=\s*(.*)\s*$', re.I)
+HTML_CONTENT_TYPE = re.compile('text/html|application/x(ht)?ml')
+DEFAULT_INDEX = 'https://pypi.org/pypi'
+
+def get_all_distribution_names(url=None):
+    """
+    Return all distribution names known by an index.
+    :param url: The URL of the index.
+    :return: A list of all known distribution names.
+    """
+    if url is None:
+        url = DEFAULT_INDEX
+    client = ServerProxy(url, timeout=3.0)
+    try:
+        return client.list_packages()
+    finally:
+        client('close')()
+
+class RedirectHandler(BaseRedirectHandler):
+    """
+    A class to work around a bug in some Python 3.2.x releases.
+    """
+    # There's a bug in the base version for some 3.2.x
+    # (e.g. 3.2.2 on Ubuntu Oneiric). If a Location header
+    # returns e.g. /abc, it bails because it says the scheme ''
+    # is bogus, when actually it should use the request's
+    # URL for the scheme. See Python issue #13696.
+    def http_error_302(self, req, fp, code, msg, headers):
+        # Some servers (incorrectly) return multiple Location headers
+        # (so probably same goes for URI).  Use first header.
+        newurl = None
+        for key in ('location', 'uri'):
+            if key in headers:
+                newurl = headers[key]
+                break
+        if newurl is None:  # pragma: no cover
+            return
+        urlparts = urlparse(newurl)
+        if urlparts.scheme == '':
+            newurl = urljoin(req.get_full_url(), newurl)
+            if hasattr(headers, 'replace_header'):
+                headers.replace_header(key, newurl)
+            else:
+                headers[key] = newurl
+        return BaseRedirectHandler.http_error_302(self, req, fp, code, msg,
+                                                  headers)
+
+    http_error_301 = http_error_303 = http_error_307 = http_error_302
+
+class Locator(object):
+    """
+    A base class for locators - things that locate distributions.
+    """
+    source_extensions = ('.tar.gz', '.tar.bz2', '.tar', '.zip', '.tgz', '.tbz')
+    binary_extensions = ('.egg', '.exe', '.whl')
+    excluded_extensions = ('.pdf',)
+
+    # A list of tags indicating which wheels you want to match. The default
+    # value of None matches against the tags compatible with the running
+    # Python. If you want to match other values, set wheel_tags on a locator
+    # instance to a list of tuples (pyver, abi, arch) which you want to match.
+    wheel_tags = None
+
+    downloadable_extensions = source_extensions + ('.whl',)
+
+    def __init__(self, scheme='default'):
+        """
+        Initialise an instance.
+        :param scheme: Because locators look for most recent versions, they
+                       need to know the version scheme to use. This specifies
+                       the current PEP-recommended scheme - use ``'legacy'``
+                       if you need to support existing distributions on PyPI.
+        """
+        self._cache = {}
+        self.scheme = scheme
+        # Because of bugs in some of the handlers on some of the platforms,
+        # we use our own opener rather than just using urlopen.
+        self.opener = build_opener(RedirectHandler())
+        # If get_project() is called from locate(), the matcher instance
+        # is set from the requirement passed to locate(). See issue #18 for
+        # why this can be useful to know.
+        self.matcher = None
+        self.errors = queue.Queue()
+
+    def get_errors(self):
+        """
+        Return any errors which have occurred.
+        """
+        result = []
+        while not self.errors.empty():  # pragma: no cover
+            try:
+                e = self.errors.get(False)
+                result.append(e)
+            except self.errors.Empty:
+                continue
+            self.errors.task_done()
+        return result
+
+    def clear_errors(self):
+        """
+        Clear any errors which may have been logged.
+        """
+        # Just get the errors and throw them away
+        self.get_errors()
+
+    def clear_cache(self):
+        self._cache.clear()
+
+    def _get_scheme(self):
+        return self._scheme
+
+    def _set_scheme(self, value):
+        self._scheme = value
+
+    scheme = property(_get_scheme, _set_scheme)
+
+    def _get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This should be implemented in subclasses.
+
+        If called from a locate() request, self.matcher will be set to a
+        matcher for the requirement to satisfy, otherwise it will be None.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Please implement in the subclass')
+
+    def get_project(self, name):
+        """
+        For a given project, get a dictionary mapping available versions to Distribution
+        instances.
+
+        This calls _get_project to do all the work, and just implements a caching layer on top.
+        """
+        if self._cache is None:  # pragma: no cover
+            result = self._get_project(name)
+        elif name in self._cache:
+            result = self._cache[name]
+        else:
+            self.clear_errors()
+            result = self._get_project(name)
+            self._cache[name] = result
+        return result
+
+    def score_url(self, url):
+        """
+        Give an url a score which can be used to choose preferred URLs
+        for a given project release.
+        """
+        t = urlparse(url)
+        basename = posixpath.basename(t.path)
+        compatible = True
+        is_wheel = basename.endswith('.whl')
+        is_downloadable = basename.endswith(self.downloadable_extensions)
+        if is_wheel:
+            compatible = is_compatible(Wheel(basename), self.wheel_tags)
+        return (t.scheme == 'https', 'pypi.org' in t.netloc,
+                is_downloadable, is_wheel, compatible, basename)
+
+    def prefer_url(self, url1, url2):
+        """
+        Choose one of two URLs where both are candidates for distribution
+        archives for the same version of a distribution (for example,
+        .tar.gz vs. zip).
+
+        The current implementation favours https:// URLs over http://, archives
+        from PyPI over those from other locations, wheel compatibility (if a
+        wheel) and then the archive name.
+        """
+        result = url2
+        if url1:
+            s1 = self.score_url(url1)
+            s2 = self.score_url(url2)
+            if s1 > s2:
+                result = url1
+            if result != url2:
+                logger.debug('Not replacing %r with %r', url1, url2)
+            else:
+                logger.debug('Replacing %r with %r', url1, url2)
+        return result
+
+    def split_filename(self, filename, project_name):
+        """
+        Attempt to split a filename in project name, version and Python version.
+        """
+        return split_filename(filename, project_name)
+
+    def convert_url_to_download_info(self, url, project_name):
+        """
+        See if a URL is a candidate for a download URL for a project (the URL
+        has typically been scraped from an HTML page).
+
+        If it is, a dictionary is returned with keys "name", "version",
+        "filename" and "url"; otherwise, None is returned.
+        """
+        def same_project(name1, name2):
+            return normalize_name(name1) == normalize_name(name2)
+
+        result = None
+        scheme, netloc, path, params, query, frag = urlparse(url)
+        if frag.lower().startswith('egg='):  # pragma: no cover
+            logger.debug('%s: version hint in fragment: %r',
+                         project_name, frag)
+        m = HASHER_HASH.match(frag)
+        if m:
+            algo, digest = m.groups()
+        else:
+            algo, digest = None, None
+        origpath = path
+        if path and path[-1] == '/':  # pragma: no cover
+            path = path[:-1]
+        if path.endswith('.whl'):
+            try:
+                wheel = Wheel(path)
+                if not is_compatible(wheel, self.wheel_tags):
+                    logger.debug('Wheel not compatible: %s', path)
+                else:
+                    if project_name is None:
+                        include = True
+                    else:
+                        include = same_project(wheel.name, project_name)
+                    if include:
+                        result = {
+                            'name': wheel.name,
+                            'version': wheel.version,
+                            'filename': wheel.filename,
+                            'url': urlunparse((scheme, netloc, origpath,
+                                               params, query, '')),
+                            'python-version': ', '.join(
+                                ['.'.join(list(v[2:])) for v in wheel.pyver]),
+                        }
+            except Exception as e:  # pragma: no cover
+                logger.warning('invalid path for wheel: %s', path)
+        elif not path.endswith(self.downloadable_extensions):  # pragma: no cover
+            logger.debug('Not downloadable: %s', path)
+        else:  # downloadable extension
+            path = filename = posixpath.basename(path)
+            for ext in self.downloadable_extensions:
+                if path.endswith(ext):
+                    path = path[:-len(ext)]
+                    t = self.split_filename(path, project_name)
+                    if not t:  # pragma: no cover
+                        logger.debug('No match for project/version: %s', path)
+                    else:
+                        name, version, pyver = t
+                        if not project_name or same_project(project_name, name):
+                            result = {
+                                'name': name,
+                                'version': version,
+                                'filename': filename,
+                                'url': urlunparse((scheme, netloc, origpath,
+                                                   params, query, '')),
+                                #'packagetype': 'sdist',
+                            }
+                            if pyver:  # pragma: no cover
+                                result['python-version'] = pyver
+                    break
+        if result and algo:
+            result['%s_digest' % algo] = digest
+        return result
+
+    def _get_digest(self, info):
+        """
+        Get a digest from a dictionary by looking at a "digests" dictionary
+        or keys of the form 'algo_digest'.
+
+        Returns a 2-tuple (algo, digest) if found, else None. Currently
+        looks only for SHA256, then MD5.
+        """
+        result = None
+        if 'digests' in info:
+            digests = info['digests']
+            for algo in ('sha256', 'md5'):
+                if algo in digests:
+                    result = (algo, digests[algo])
+                    break
+        if not result:
+            for algo in ('sha256', 'md5'):
+                key = '%s_digest' % algo
+                if key in info:
+                    result = (algo, info[key])
+                    break
+        return result
+
+    def _update_version_data(self, result, info):
+        """
+        Update a result dictionary (the final result from _get_project) with a
+        dictionary for a specific version, which typically holds information
+        gleaned from a filename or URL for an archive for the distribution.
+        """
+        name = info.pop('name')
+        version = info.pop('version')
+        if version in result:
+            dist = result[version]
+            md = dist.metadata
+        else:
+            dist = make_dist(name, version, scheme=self.scheme)
+            md = dist.metadata
+        dist.digest = digest = self._get_digest(info)
+        url = info['url']
+        result['digests'][url] = digest
+        if md.source_url != info['url']:
+            md.source_url = self.prefer_url(md.source_url, url)
+            result['urls'].setdefault(version, set()).add(url)
+        dist.locator = self
+        result[version] = dist
+
+    def locate(self, requirement, prereleases=False):
+        """
+        Find the most recent distribution which matches the given
+        requirement.
+
+        :param requirement: A requirement of the form 'foo (1.0)' or perhaps
+                            'foo (>= 1.0, < 2.0, != 1.3)'
+        :param prereleases: If ``True``, allow pre-release versions
+                            to be located. Otherwise, pre-release versions
+                            are not returned.
+        :return: A :class:`Distribution` instance, or ``None`` if no such
+                 distribution could be located.
+        """
+        result = None
+        r = parse_requirement(requirement)
+        if r is None:  # pragma: no cover
+            raise DistlibException('Not a valid requirement: %r' % requirement)
+        scheme = get_scheme(self.scheme)
+        self.matcher = matcher = scheme.matcher(r.requirement)
+        logger.debug('matcher: %s (%s)', matcher, type(matcher).__name__)
+        versions = self.get_project(r.name)
+        if len(versions) > 2:   # urls and digests keys are present
+            # sometimes, versions are invalid
+            slist = []
+            vcls = matcher.version_class
+            for k in versions:
+                if k in ('urls', 'digests'):
+                    continue
+                try:
+                    if not matcher.match(k):
+                        pass  # logger.debug('%s did not match %r', matcher, k)
+                    else:
+                        if prereleases or not vcls(k).is_prerelease:
+                            slist.append(k)
+                        # else:
+                            # logger.debug('skipping pre-release '
+                                         # 'version %s of %s', k, matcher.name)
+                except Exception:  # pragma: no cover
+                    logger.warning('error matching %s with %r', matcher, k)
+                    pass # slist.append(k)
+            if len(slist) > 1:
+                slist = sorted(slist, key=scheme.key)
+            if slist:
+                logger.debug('sorted list: %s', slist)
+                version = slist[-1]
+                result = versions[version]
+        if result:
+            if r.extras:
+                result.extras = r.extras
+            result.download_urls = versions.get('urls', {}).get(version, set())
+            d = {}
+            sd = versions.get('digests', {})
+            for url in result.download_urls:
+                if url in sd:  # pragma: no cover
+                    d[url] = sd[url]
+            result.digests = d
+        self.matcher = None
+        return result
+
+
+class PyPIRPCLocator(Locator):
+    """
+    This locator uses XML-RPC to locate distributions. It therefore
+    cannot be used with simple mirrors (that only mirror file content).
+    """
+    def __init__(self, url, **kwargs):
+        """
+        Initialise an instance.
+
+        :param url: The URL to use for XML-RPC.
+        :param kwargs: Passed to the superclass constructor.
+        """
+        super(PyPIRPCLocator, self).__init__(**kwargs)
+        self.base_url = url
+        self.client = ServerProxy(url, timeout=3.0)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        return set(self.client.list_packages())
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        versions = self.client.package_releases(name, True)
+        for v in versions:
+            urls = self.client.release_urls(name, v)
+            data = self.client.release_data(name, v)
+            metadata = Metadata(scheme=self.scheme)
+            metadata.name = data['name']
+            metadata.version = data['version']
+            metadata.license = data.get('license')
+            metadata.keywords = data.get('keywords', [])
+            metadata.summary = data.get('summary')
+            dist = Distribution(metadata)
+            if urls:
+                info = urls[0]
+                metadata.source_url = info['url']
+                dist.digest = self._get_digest(info)
+                dist.locator = self
+                result[v] = dist
+                for info in urls:
+                    url = info['url']
+                    digest = self._get_digest(info)
+                    result['urls'].setdefault(v, set()).add(url)
+                    result['digests'][url] = digest
+        return result
+
+class PyPIJSONLocator(Locator):
+    """
+    This locator uses PyPI's JSON interface. It's very limited in functionality
+    and probably not worth using.
+    """
+    def __init__(self, url, **kwargs):
+        super(PyPIJSONLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        url = urljoin(self.base_url, '%s/json' % quote(name))
+        try:
+            resp = self.opener.open(url)
+            data = resp.read().decode() # for now
+            d = json.loads(data)
+            md = Metadata(scheme=self.scheme)
+            data = d['info']
+            md.name = data['name']
+            md.version = data['version']
+            md.license = data.get('license')
+            md.keywords = data.get('keywords', [])
+            md.summary = data.get('summary')
+            dist = Distribution(md)
+            dist.locator = self
+            urls = d['urls']
+            result[md.version] = dist
+            for info in d['urls']:
+                url = info['url']
+                dist.download_urls.add(url)
+                dist.digests[url] = self._get_digest(info)
+                result['urls'].setdefault(md.version, set()).add(url)
+                result['digests'][url] = self._get_digest(info)
+            # Now get other releases
+            for version, infos in d['releases'].items():
+                if version == md.version:
+                    continue    # already done
+                omd = Metadata(scheme=self.scheme)
+                omd.name = md.name
+                omd.version = version
+                odist = Distribution(omd)
+                odist.locator = self
+                result[version] = odist
+                for info in infos:
+                    url = info['url']
+                    odist.download_urls.add(url)
+                    odist.digests[url] = self._get_digest(info)
+                    result['urls'].setdefault(version, set()).add(url)
+                    result['digests'][url] = self._get_digest(info)
+#            for info in urls:
+#                md.source_url = info['url']
+#                dist.digest = self._get_digest(info)
+#                dist.locator = self
+#                for info in urls:
+#                    url = info['url']
+#                    result['urls'].setdefault(md.version, set()).add(url)
+#                    result['digests'][url] = self._get_digest(info)
+        except Exception as e:
+            self.errors.put(text_type(e))
+            logger.exception('JSON fetch failed: %s', e)
+        return result
+
+
+class Page(object):
+    """
+    This class represents a scraped HTML page.
+    """
+    # The following slightly hairy-looking regex just looks for the contents of
+    # an anchor link, which has an attribute "href" either immediately preceded
+    # or immediately followed by a "rel" attribute. The attribute values can be
+    # declared with double quotes, single quotes or no quotes - which leads to
+    # the length of the expression.
+    _href = re.compile("""
+(rel\\s*=\\s*(?:"(?P<rel1>[^"]*)"|'(?P<rel2>[^']*)'|(?P<rel3>[^>\\s\n]*))\\s+)?
+href\\s*=\\s*(?:"(?P<url1>[^"]*)"|'(?P<url2>[^']*)'|(?P<url3>[^>\\s\n]*))
+(\\s+rel\\s*=\\s*(?:"(?P<rel4>[^"]*)"|'(?P<rel5>[^']*)'|(?P<rel6>[^>\\s\n]*)))?
+""", re.I | re.S | re.X)
+    _base = re.compile(r"""<base\s+href\s*=\s*['"]?([^'">]+)""", re.I | re.S)
+
+    def __init__(self, data, url):
+        """
+        Initialise an instance with the Unicode page contents and the URL they
+        came from.
+        """
+        self.data = data
+        self.base_url = self.url = url
+        m = self._base.search(self.data)
+        if m:
+            self.base_url = m.group(1)
+
+    _clean_re = re.compile(r'[^a-z0-9$&+,/:;=?@.#%_\\|-]', re.I)
+
+    @cached_property
+    def links(self):
+        """
+        Return the URLs of all the links on a page together with information
+        about their "rel" attribute, for determining which ones to treat as
+        downloads and which ones to queue for further scraping.
+        """
+        def clean(url):
+            "Tidy up an URL."
+            scheme, netloc, path, params, query, frag = urlparse(url)
+            return urlunparse((scheme, netloc, quote(path),
+                               params, query, frag))
+
+        result = set()
+        for match in self._href.finditer(self.data):
+            d = match.groupdict('')
+            rel = (d['rel1'] or d['rel2'] or d['rel3'] or
+                   d['rel4'] or d['rel5'] or d['rel6'])
+            url = d['url1'] or d['url2'] or d['url3']
+            url = urljoin(self.base_url, url)
+            url = unescape(url)
+            url = self._clean_re.sub(lambda m: '%%%2x' % ord(m.group(0)), url)
+            result.add((url, rel))
+        # We sort the result, hoping to bring the most recent versions
+        # to the front
+        result = sorted(result, key=lambda t: t[0], reverse=True)
+        return result
+
+
+class SimpleScrapingLocator(Locator):
+    """
+    A locator which scrapes HTML pages to locate downloads for a distribution.
+    This runs multiple threads to do the I/O; performance is at least as good
+    as pip's PackageFinder, which works in an analogous fashion.
+    """
+
+    # These are used to deal with various Content-Encoding schemes.
+    decoders = {
+        'deflate': zlib.decompress,
+        'gzip': lambda b: gzip.GzipFile(fileobj=BytesIO(b)).read(),
+        'none': lambda b: b,
+    }
+
+    def __init__(self, url, timeout=None, num_workers=10, **kwargs):
+        """
+        Initialise an instance.
+        :param url: The root URL to use for scraping.
+        :param timeout: The timeout, in seconds, to be applied to requests.
+                        This defaults to ``None`` (no timeout specified).
+        :param num_workers: The number of worker threads you want to do I/O,
+                            This defaults to 10.
+        :param kwargs: Passed to the superclass.
+        """
+        super(SimpleScrapingLocator, self).__init__(**kwargs)
+        self.base_url = ensure_slash(url)
+        self.timeout = timeout
+        self._page_cache = {}
+        self._seen = set()
+        self._to_fetch = queue.Queue()
+        self._bad_hosts = set()
+        self.skip_externals = False
+        self.num_workers = num_workers
+        self._lock = threading.RLock()
+        # See issue #45: we need to be resilient when the locator is used
+        # in a thread, e.g. with concurrent.futures. We can't use self._lock
+        # as it is for coordinating our internal threads - the ones created
+        # in _prepare_threads.
+        self._gplock = threading.RLock()
+        self.platform_check = False  # See issue #112
+
+    def _prepare_threads(self):
+        """
+        Threads are created only when get_project is called, and terminate
+        before it returns. They are there primarily to parallelise I/O (i.e.
+        fetching web pages).
+        """
+        self._threads = []
+        for i in range(self.num_workers):
+            t = threading.Thread(target=self._fetch)
+            t.daemon = True
+            t.start()
+            self._threads.append(t)
+
+    def _wait_threads(self):
+        """
+        Tell all the threads to terminate (by sending a sentinel value) and
+        wait for them to do so.
+        """
+        # Note that you need two loops, since you can't say which
+        # thread will get each sentinel
+        for t in self._threads:
+            self._to_fetch.put(None)    # sentinel
+        for t in self._threads:
+            t.join()
+        self._threads = []
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        with self._gplock:
+            self.result = result
+            self.project_name = name
+            url = urljoin(self.base_url, '%s/' % quote(name))
+            self._seen.clear()
+            self._page_cache.clear()
+            self._prepare_threads()
+            try:
+                logger.debug('Queueing %s', url)
+                self._to_fetch.put(url)
+                self._to_fetch.join()
+            finally:
+                self._wait_threads()
+            del self.result
+        return result
+
+    platform_dependent = re.compile(r'\b(linux_(i\d86|x86_64|arm\w+)|'
+                                    r'win(32|_amd64)|macosx_?\d+)\b', re.I)
+
+    def _is_platform_dependent(self, url):
+        """
+        Does an URL refer to a platform-specific download?
+        """
+        return self.platform_dependent.search(url)
+
+    def _process_download(self, url):
+        """
+        See if an URL is a suitable download for a project.
+
+        If it is, register information in the result dictionary (for
+        _get_project) about the specific version it's for.
+
+        Note that the return value isn't actually used other than as a boolean
+        value.
+        """
+        if self.platform_check and self._is_platform_dependent(url):
+            info = None
+        else:
+            info = self.convert_url_to_download_info(url, self.project_name)
+        logger.debug('process_download: %s -> %s', url, info)
+        if info:
+            with self._lock:    # needed because self.result is shared
+                self._update_version_data(self.result, info)
+        return info
+
+    def _should_queue(self, link, referrer, rel):
+        """
+        Determine whether a link URL from a referring page and with a
+        particular "rel" attribute should be queued for scraping.
+        """
+        scheme, netloc, path, _, _, _ = urlparse(link)
+        if path.endswith(self.source_extensions + self.binary_extensions +
+                         self.excluded_extensions):
+            result = False
+        elif self.skip_externals and not link.startswith(self.base_url):
+            result = False
+        elif not referrer.startswith(self.base_url):
+            result = False
+        elif rel not in ('homepage', 'download'):
+            result = False
+        elif scheme not in ('http', 'https', 'ftp'):
+            result = False
+        elif self._is_platform_dependent(link):
+            result = False
+        else:
+            host = netloc.split(':', 1)[0]
+            if host.lower() == 'localhost':
+                result = False
+            else:
+                result = True
+        logger.debug('should_queue: %s (%s) from %s -> %s', link, rel,
+                     referrer, result)
+        return result
+
+    def _fetch(self):
+        """
+        Get a URL to fetch from the work queue, get the HTML page, examine its
+        links for download candidates and candidates for further scraping.
+
+        This is a handy method to run in a thread.
+        """
+        while True:
+            url = self._to_fetch.get()
+            try:
+                if url:
+                    page = self.get_page(url)
+                    if page is None:    # e.g. after an error
+                        continue
+                    for link, rel in page.links:
+                        if link not in self._seen:
+                            try:
+                                self._seen.add(link)
+                                if (not self._process_download(link) and
+                                    self._should_queue(link, url, rel)):
+                                    logger.debug('Queueing %s from %s', link, url)
+                                    self._to_fetch.put(link)
+                            except MetadataInvalidError:  # e.g. invalid versions
+                                pass
+            except Exception as e:  # pragma: no cover
+                self.errors.put(text_type(e))
+            finally:
+                # always do this, to avoid hangs :-)
+                self._to_fetch.task_done()
+            if not url:
+                #logger.debug('Sentinel seen, quitting.')
+                break
+
+    def get_page(self, url):
+        """
+        Get the HTML for an URL, possibly from an in-memory cache.
+
+        XXX TODO Note: this cache is never actually cleared. It's assumed that
+        the data won't get stale over the lifetime of a locator instance (not
+        necessarily true for the default_locator).
+        """
+        # http://peak.telecommunity.com/DevCenter/EasyInstall#package-index-api
+        scheme, netloc, path, _, _, _ = urlparse(url)
+        if scheme == 'file' and os.path.isdir(url2pathname(path)):
+            url = urljoin(ensure_slash(url), 'index.html')
+
+        if url in self._page_cache:
+            result = self._page_cache[url]
+            logger.debug('Returning %s from cache: %s', url, result)
+        else:
+            host = netloc.split(':', 1)[0]
+            result = None
+            if host in self._bad_hosts:
+                logger.debug('Skipping %s due to bad host %s', url, host)
+            else:
+                req = Request(url, headers={'Accept-encoding': 'identity'})
+                try:
+                    logger.debug('Fetching %s', url)
+                    resp = self.opener.open(req, timeout=self.timeout)
+                    logger.debug('Fetched %s', url)
+                    headers = resp.info()
+                    content_type = headers.get('Content-Type', '')
+                    if HTML_CONTENT_TYPE.match(content_type):
+                        final_url = resp.geturl()
+                        data = resp.read()
+                        encoding = headers.get('Content-Encoding')
+                        if encoding:
+                            decoder = self.decoders[encoding]   # fail if not found
+                            data = decoder(data)
+                        encoding = 'utf-8'
+                        m = CHARSET.search(content_type)
+                        if m:
+                            encoding = m.group(1)
+                        try:
+                            data = data.decode(encoding)
+                        except UnicodeError:  # pragma: no cover
+                            data = data.decode('latin-1')    # fallback
+                        result = Page(data, final_url)
+                        self._page_cache[final_url] = result
+                except HTTPError as e:
+                    if e.code != 404:
+                        logger.exception('Fetch failed: %s: %s', url, e)
+                except URLError as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                    with self._lock:
+                        self._bad_hosts.add(host)
+                except Exception as e:  # pragma: no cover
+                    logger.exception('Fetch failed: %s: %s', url, e)
+                finally:
+                    self._page_cache[url] = result   # even if None (failure)
+        return result
+
+    _distname_re = re.compile('<a href=[^>]*>([^<]+)<')
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        page = self.get_page(self.base_url)
+        if not page:
+            raise DistlibException('Unable to get %s' % self.base_url)
+        for match in self._distname_re.finditer(page.data):
+            result.add(match.group(1))
+        return result
+
+class DirectoryLocator(Locator):
+    """
+    This class locates distributions in a directory tree.
+    """
+
+    def __init__(self, path, **kwargs):
+        """
+        Initialise an instance.
+        :param path: The root of the directory tree to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * recursive - if True (the default), subdirectories are
+                         recursed into. If False, only the top-level directory
+                         is searched,
+        """
+        self.recursive = kwargs.pop('recursive', True)
+        super(DirectoryLocator, self).__init__(**kwargs)
+        path = os.path.abspath(path)
+        if not os.path.isdir(path):  # pragma: no cover
+            raise DistlibException('Not a directory: %r' % path)
+        self.base_dir = path
+
+    def should_include(self, filename, parent):
+        """
+        Should a filename be considered as a candidate for a distribution
+        archive? As well as the filename, the directory which contains it
+        is provided, though not used by the current implementation.
+        """
+        return filename.endswith(self.downloadable_extensions)
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, name)
+                    if info:
+                        self._update_version_data(result, info)
+            if not self.recursive:
+                break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for root, dirs, files in os.walk(self.base_dir):
+            for fn in files:
+                if self.should_include(fn, root):
+                    fn = os.path.join(root, fn)
+                    url = urlunparse(('file', '',
+                                      pathname2url(os.path.abspath(fn)),
+                                      '', '', ''))
+                    info = self.convert_url_to_download_info(url, None)
+                    if info:
+                        result.add(info['name'])
+            if not self.recursive:
+                break
+        return result
+
+class JSONLocator(Locator):
+    """
+    This locator uses special extended metadata (not available on PyPI) and is
+    the basis of performant dependency resolution in distlib. Other locators
+    require archive downloads before dependencies can be determined! As you
+    might imagine, that can be slow.
+    """
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        raise NotImplementedError('Not available from this locator')
+
+    def _get_project(self, name):
+        result = {'urls': {}, 'digests': {}}
+        data = get_project_data(name)
+        if data:
+            for info in data.get('files', []):
+                if info['ptype'] != 'sdist' or info['pyversion'] != 'source':
+                    continue
+                # We don't store summary in project metadata as it makes
+                # the data bigger for no benefit during dependency
+                # resolution
+                dist = make_dist(data['name'], info['version'],
+                                 summary=data.get('summary',
+                                                  'Placeholder for summary'),
+                                 scheme=self.scheme)
+                md = dist.metadata
+                md.source_url = info['url']
+                # TODO SHA256 digest
+                if 'digest' in info and info['digest']:
+                    dist.digest = ('md5', info['digest'])
+                md.dependencies = info.get('requirements', {})
+                dist.exports = info.get('exports', {})
+                result[dist.version] = dist
+                result['urls'].setdefault(dist.version, set()).add(info['url'])
+        return result
+
+class DistPathLocator(Locator):
+    """
+    This locator finds installed distributions in a path. It can be useful for
+    adding to an :class:`AggregatingLocator`.
+    """
+    def __init__(self, distpath, **kwargs):
+        """
+        Initialise an instance.
+
+        :param distpath: A :class:`DistributionPath` instance to search.
+        """
+        super(DistPathLocator, self).__init__(**kwargs)
+        assert isinstance(distpath, DistributionPath)
+        self.distpath = distpath
+
+    def _get_project(self, name):
+        dist = self.distpath.get_distribution(name)
+        if dist is None:
+            result = {'urls': {}, 'digests': {}}
+        else:
+            result = {
+                dist.version: dist,
+                'urls': {dist.version: set([dist.source_url])},
+                'digests': {dist.version: set([None])}
+            }
+        return result
+
+
+class AggregatingLocator(Locator):
+    """
+    This class allows you to chain and/or merge a list of locators.
+    """
+    def __init__(self, *locators, **kwargs):
+        """
+        Initialise an instance.
+
+        :param locators: The list of locators to search.
+        :param kwargs: Passed to the superclass constructor,
+                       except for:
+                       * merge - if False (the default), the first successful
+                         search from any of the locators is returned. If True,
+                         the results from all locators are merged (this can be
+                         slow).
+        """
+        self.merge = kwargs.pop('merge', False)
+        self.locators = locators
+        super(AggregatingLocator, self).__init__(**kwargs)
+
+    def clear_cache(self):
+        super(AggregatingLocator, self).clear_cache()
+        for locator in self.locators:
+            locator.clear_cache()
+
+    def _set_scheme(self, value):
+        self._scheme = value
+        for locator in self.locators:
+            locator.scheme = value
+
+    scheme = property(Locator.scheme.fget, _set_scheme)
+
+    def _get_project(self, name):
+        result = {}
+        for locator in self.locators:
+            d = locator.get_project(name)
+            if d:
+                if self.merge:
+                    files = result.get('urls', {})
+                    digests = result.get('digests', {})
+                    # next line could overwrite result['urls'], result['digests']
+                    result.update(d)
+                    df = result.get('urls')
+                    if files and df:
+                        for k, v in files.items():
+                            if k in df:
+                                df[k] |= v
+                            else:
+                                df[k] = v
+                    dd = result.get('digests')
+                    if digests and dd:
+                        dd.update(digests)
+                else:
+                    # See issue #18. If any dists are found and we're looking
+                    # for specific constraints, we only return something if
+                    # a match is found. For example, if a DirectoryLocator
+                    # returns just foo (1.0) while we're looking for
+                    # foo (>= 2.0), we'll pretend there was nothing there so
+                    # that subsequent locators can be queried. Otherwise we
+                    # would just return foo (1.0) which would then lead to a
+                    # failure to find foo (>= 2.0), because other locators
+                    # weren't searched. Note that this only matters when
+                    # merge=False.
+                    if self.matcher is None:
+                        found = True
+                    else:
+                        found = False
+                        for k in d:
+                            if self.matcher.match(k):
+                                found = True
+                                break
+                    if found:
+                        result = d
+                        break
+        return result
+
+    def get_distribution_names(self):
+        """
+        Return all the distribution names known to this locator.
+        """
+        result = set()
+        for locator in self.locators:
+            try:
+                result |= locator.get_distribution_names()
+            except NotImplementedError:
+                pass
+        return result
+
+
+# We use a legacy scheme simply because most of the dists on PyPI use legacy
+# versions which don't conform to PEP 440.
+default_locator = AggregatingLocator(
+                    # JSONLocator(), # don't use as PEP 426 is withdrawn
+                    SimpleScrapingLocator('https://pypi.org/simple/',
+                                          timeout=3.0),
+                    scheme='legacy')
+
+locate = default_locator.locate
+
+
+class DependencyFinder(object):
+    """
+    Locate dependencies for distributions.
+    """
+
+    def __init__(self, locator=None):
+        """
+        Initialise an instance, using the specified locator
+        to locate distributions.
+        """
+        self.locator = locator or default_locator
+        self.scheme = get_scheme(self.locator.scheme)
+
+    def add_distribution(self, dist):
+        """
+        Add a distribution to the finder. This will update internal information
+        about who provides what.
+        :param dist: The distribution to add.
+        """
+        logger.debug('adding distribution %s', dist)
+        name = dist.key
+        self.dists_by_name[name] = dist
+        self.dists[(name, dist.version)] = dist
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Add to provided: %s, %s, %s', name, version, dist)
+            self.provided.setdefault(name, set()).add((version, dist))
+
+    def remove_distribution(self, dist):
+        """
+        Remove a distribution from the finder. This will update internal
+        information about who provides what.
+        :param dist: The distribution to remove.
+        """
+        logger.debug('removing distribution %s', dist)
+        name = dist.key
+        del self.dists_by_name[name]
+        del self.dists[(name, dist.version)]
+        for p in dist.provides:
+            name, version = parse_name_and_version(p)
+            logger.debug('Remove from provided: %s, %s, %s', name, version, dist)
+            s = self.provided[name]
+            s.remove((version, dist))
+            if not s:
+                del self.provided[name]
+
+    def get_matcher(self, reqt):
+        """
+        Get a version matcher for a requirement.
+        :param reqt: The requirement
+        :type reqt: str
+        :return: A version matcher (an instance of
+                 :class:`distlib.version.Matcher`).
+        """
+        try:
+            matcher = self.scheme.matcher(reqt)
+        except UnsupportedVersionError:  # pragma: no cover
+            # XXX compat-mode if cannot read the version
+            name = reqt.split()[0]
+            matcher = self.scheme.matcher(name)
+        return matcher
+
+    def find_providers(self, reqt):
+        """
+        Find the distributions which can fulfill a requirement.
+
+        :param reqt: The requirement.
+         :type reqt: str
+        :return: A set of distribution which can fulfill the requirement.
+        """
+        matcher = self.get_matcher(reqt)
+        name = matcher.key   # case-insensitive
+        result = set()
+        provided = self.provided
+        if name in provided:
+            for version, provider in provided[name]:
+                try:
+                    match = matcher.match(version)
+                except UnsupportedVersionError:
+                    match = False
+
+                if match:
+                    result.add(provider)
+                    break
+        return result
+
+    def try_to_replace(self, provider, other, problems):
+        """
+        Attempt to replace one provider with another. This is typically used
+        when resolving dependencies from multiple sources, e.g. A requires
+        (B >= 1.0) while C requires (B >= 1.1).
+
+        For successful replacement, ``provider`` must meet all the requirements
+        which ``other`` fulfills.
+
+        :param provider: The provider we are trying to replace with.
+        :param other: The provider we're trying to replace.
+        :param problems: If False is returned, this will contain what
+                         problems prevented replacement. This is currently
+                         a tuple of the literal string 'cantreplace',
+                         ``provider``, ``other``  and the set of requirements
+                         that ``provider`` couldn't fulfill.
+        :return: True if we can replace ``other`` with ``provider``, else
+                 False.
+        """
+        rlist = self.reqts[other]
+        unmatched = set()
+        for s in rlist:
+            matcher = self.get_matcher(s)
+            if not matcher.match(provider.version):
+                unmatched.add(s)
+        if unmatched:
+            # can't replace other with provider
+            problems.add(('cantreplace', provider, other,
+                          frozenset(unmatched)))
+            result = False
+        else:
+            # can replace other with provider
+            self.remove_distribution(other)
+            del self.reqts[other]
+            for s in rlist:
+                self.reqts.setdefault(provider, set()).add(s)
+            self.add_distribution(provider)
+            result = True
+        return result
+
+    def find(self, requirement, meta_extras=None, prereleases=False):
+        """
+        Find a distribution and all distributions it depends on.
+
+        :param requirement: The requirement specifying the distribution to
+                            find, or a Distribution instance.
+        :param meta_extras: A list of meta extras such as :test:, :build: and
+                            so on.
+        :param prereleases: If ``True``, allow pre-release versions to be
+                            returned - otherwise, don't return prereleases
+                            unless they're all that's available.
+
+        Return a set of :class:`Distribution` instances and a set of
+        problems.
+
+        The distributions returned should be such that they have the
+        :attr:`required` attribute set to ``True`` if they were
+        from the ``requirement`` passed to ``find()``, and they have the
+        :attr:`build_time_dependency` attribute set to ``True`` unless they
+        are post-installation dependencies of the ``requirement``.
+
+        The problems should be a tuple consisting of the string
+        ``'unsatisfied'`` and the requirement which couldn't be satisfied
+        by any distribution known to the locator.
+        """
+
+        self.provided = {}
+        self.dists = {}
+        self.dists_by_name = {}
+        self.reqts = {}
+
+        meta_extras = set(meta_extras or [])
+        if ':*:' in meta_extras:
+            meta_extras.remove(':*:')
+            # :meta: and :run: are implicitly included
+            meta_extras |= set([':test:', ':build:', ':dev:'])
+
+        if isinstance(requirement, Distribution):
+            dist = odist = requirement
+            logger.debug('passed %s as requirement', odist)
+        else:
+            dist = odist = self.locator.locate(requirement,
+                                               prereleases=prereleases)
+            if dist is None:
+                raise DistlibException('Unable to locate %r' % requirement)
+            logger.debug('located %s', odist)
+        dist.requested = True
+        problems = set()
+        todo = set([dist])
+        install_dists = set([odist])
+        while todo:
+            dist = todo.pop()
+            name = dist.key     # case-insensitive
+            if name not in self.dists_by_name:
+                self.add_distribution(dist)
+            else:
+                #import pdb; pdb.set_trace()
+                other = self.dists_by_name[name]
+                if other != dist:
+                    self.try_to_replace(dist, other, problems)
+
+            ireqts = dist.run_requires | dist.meta_requires
+            sreqts = dist.build_requires
+            ereqts = set()
+            if meta_extras and dist in install_dists:
+                for key in ('test', 'build', 'dev'):
+                    e = ':%s:' % key
+                    if e in meta_extras:
+                        ereqts |= getattr(dist, '%s_requires' % key)
+            all_reqts = ireqts | sreqts | ereqts
+            for r in all_reqts:
+                providers = self.find_providers(r)
+                if not providers:
+                    logger.debug('No providers found for %r', r)
+                    provider = self.locator.locate(r, prereleases=prereleases)
+                    # If no provider is found and we didn't consider
+                    # prereleases, consider them now.
+                    if provider is None and not prereleases:
+                        provider = self.locator.locate(r, prereleases=True)
+                    if provider is None:
+                        logger.debug('Cannot satisfy %r', r)
+                        problems.add(('unsatisfied', r))
+                    else:
+                        n, v = provider.key, provider.version
+                        if (n, v) not in self.dists:
+                            todo.add(provider)
+                        providers.add(provider)
+                        if r in ireqts and dist in install_dists:
+                            install_dists.add(provider)
+                            logger.debug('Adding %s to install_dists',
+                                         provider.name_and_version)
+                for p in providers:
+                    name = p.key
+                    if name not in self.dists_by_name:
+                        self.reqts.setdefault(p, set()).add(r)
+                    else:
+                        other = self.dists_by_name[name]
+                        if other != p:
+                            # see if other can be replaced by p
+                            self.try_to_replace(p, other, problems)
+
+        dists = set(self.dists.values())
+        for dist in dists:
+            dist.build_time_dependency = dist not in install_dists
+            if dist.build_time_dependency:
+                logger.debug('%s is a build-time dependency only.',
+                             dist.name_and_version)
+        logger.debug('find done for %s', odist)
+        return dists, problems
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/manifest.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/manifest.py
new file mode 100644
index 0000000..ca0fe44
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/manifest.py
@@ -0,0 +1,393 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2013 Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Class representing the list of files in a distribution.
+
+Equivalent to distutils.filelist, but fixes some problems.
+"""
+import fnmatch
+import logging
+import os
+import re
+import sys
+
+from . import DistlibException
+from .compat import fsdecode
+from .util import convert_path
+
+
+__all__ = ['Manifest']
+
+logger = logging.getLogger(__name__)
+
+# a \ followed by some spaces + EOL
+_COLLAPSE_PATTERN = re.compile('\\\\w*\n', re.M)
+_COMMENTED_LINE = re.compile('#.*?(?=\n)|\n(?=$)', re.M | re.S)
+
+#
+# Due to the different results returned by fnmatch.translate, we need
+# to do slightly different processing for Python 2.7 and 3.2 ... this needed
+# to be brought in for Python 3.6 onwards.
+#
+_PYTHON_VERSION = sys.version_info[:2]
+
+class Manifest(object):
+    """A list of files built by on exploring the filesystem and filtered by
+    applying various patterns to what we find there.
+    """
+
+    def __init__(self, base=None):
+        """
+        Initialise an instance.
+
+        :param base: The base directory to explore under.
+        """
+        self.base = os.path.abspath(os.path.normpath(base or os.getcwd()))
+        self.prefix = self.base + os.sep
+        self.allfiles = None
+        self.files = set()
+
+    #
+    # Public API
+    #
+
+    def findall(self):
+        """Find all files under the base and set ``allfiles`` to the absolute
+        pathnames of files found.
+        """
+        from stat import S_ISREG, S_ISDIR, S_ISLNK
+
+        self.allfiles = allfiles = []
+        root = self.base
+        stack = [root]
+        pop = stack.pop
+        push = stack.append
+
+        while stack:
+            root = pop()
+            names = os.listdir(root)
+
+            for name in names:
+                fullname = os.path.join(root, name)
+
+                # Avoid excess stat calls -- just one will do, thank you!
+                stat = os.stat(fullname)
+                mode = stat.st_mode
+                if S_ISREG(mode):
+                    allfiles.append(fsdecode(fullname))
+                elif S_ISDIR(mode) and not S_ISLNK(mode):
+                    push(fullname)
+
+    def add(self, item):
+        """
+        Add a file to the manifest.
+
+        :param item: The pathname to add. This can be relative to the base.
+        """
+        if not item.startswith(self.prefix):
+            item = os.path.join(self.base, item)
+        self.files.add(os.path.normpath(item))
+
+    def add_many(self, items):
+        """
+        Add a list of files to the manifest.
+
+        :param items: The pathnames to add. These can be relative to the base.
+        """
+        for item in items:
+            self.add(item)
+
+    def sorted(self, wantdirs=False):
+        """
+        Return sorted files in directory order
+        """
+
+        def add_dir(dirs, d):
+            dirs.add(d)
+            logger.debug('add_dir added %s', d)
+            if d != self.base:
+                parent, _ = os.path.split(d)
+                assert parent not in ('', '/')
+                add_dir(dirs, parent)
+
+        result = set(self.files)    # make a copy!
+        if wantdirs:
+            dirs = set()
+            for f in result:
+                add_dir(dirs, os.path.dirname(f))
+            result |= dirs
+        return [os.path.join(*path_tuple) for path_tuple in
+                sorted(os.path.split(path) for path in result)]
+
+    def clear(self):
+        """Clear all collected files."""
+        self.files = set()
+        self.allfiles = []
+
+    def process_directive(self, directive):
+        """
+        Process a directive which either adds some files from ``allfiles`` to
+        ``files``, or removes some files from ``files``.
+
+        :param directive: The directive to process. This should be in a format
+                     compatible with distutils ``MANIFEST.in`` files:
+
+                     http://docs.python.org/distutils/sourcedist.html#commands
+        """
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dirpattern).
+        action, patterns, thedir, dirpattern = self._parse_directive(directive)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=True):
+                    logger.warning('no files found matching %r', pattern)
+
+        elif action == 'exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=True)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'found matching %r', pattern)
+
+        elif action == 'global-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, anchor=False):
+                    logger.warning('no files found matching %r '
+                                   'anywhere in distribution', pattern)
+
+        elif action == 'global-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, anchor=False)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found anywhere in '
+                #                   'distribution', pattern)
+
+        elif action == 'recursive-include':
+            for pattern in patterns:
+                if not self._include_pattern(pattern, prefix=thedir):
+                    logger.warning('no files found matching %r '
+                                   'under directory %r', pattern, thedir)
+
+        elif action == 'recursive-exclude':
+            for pattern in patterns:
+                found = self._exclude_pattern(pattern, prefix=thedir)
+                #if not found:
+                #    logger.warning('no previously-included files '
+                #                   'matching %r found under directory %r',
+                #                   pattern, thedir)
+
+        elif action == 'graft':
+            if not self._include_pattern(None, prefix=dirpattern):
+                logger.warning('no directories found matching %r',
+                               dirpattern)
+
+        elif action == 'prune':
+            if not self._exclude_pattern(None, prefix=dirpattern):
+                logger.warning('no previously-included directories found '
+                               'matching %r', dirpattern)
+        else:   # pragma: no cover
+            # This should never happen, as it should be caught in
+            # _parse_template_line
+            raise DistlibException(
+                'invalid action %r' % action)
+
+    #
+    # Private API
+    #
+
+    def _parse_directive(self, directive):
+        """
+        Validate a directive.
+        :param directive: The directive to validate.
+        :return: A tuple of action, patterns, thedir, dir_patterns
+        """
+        words = directive.split()
+        if len(words) == 1 and words[0] not in ('include', 'exclude',
+                                                'global-include',
+                                                'global-exclude',
+                                                'recursive-include',
+                                                'recursive-exclude',
+                                                'graft', 'prune'):
+            # no action given, let's use the default 'include'
+            words.insert(0, 'include')
+
+        action = words[0]
+        patterns = thedir = dir_pattern = None
+
+        if action in ('include', 'exclude',
+                      'global-include', 'global-exclude'):
+            if len(words) < 2:
+                raise DistlibException(
+                    '%r expects <pattern1> <pattern2> ...' % action)
+
+            patterns = [convert_path(word) for word in words[1:]]
+
+        elif action in ('recursive-include', 'recursive-exclude'):
+            if len(words) < 3:
+                raise DistlibException(
+                    '%r expects <dir> <pattern1> <pattern2> ...' % action)
+
+            thedir = convert_path(words[1])
+            patterns = [convert_path(word) for word in words[2:]]
+
+        elif action in ('graft', 'prune'):
+            if len(words) != 2:
+                raise DistlibException(
+                    '%r expects a single <dir_pattern>' % action)
+
+            dir_pattern = convert_path(words[1])
+
+        else:
+            raise DistlibException('unknown action %r' % action)
+
+        return action, patterns, thedir, dir_pattern
+
+    def _include_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Select strings (presumably filenames) from 'self.files' that
+        match 'pattern', a Unix-style wildcard (glob) pattern.
+
+        Patterns are not quite the same as implemented by the 'fnmatch'
+        module: '*' and '?'  match non-special characters, where "special"
+        is platform-dependent: slash on Unix; colon, slash, and backslash on
+        DOS/Windows; and colon on Mac OS.
+
+        If 'anchor' is true (the default), then the pattern match is more
+        stringent: "*.py" will match "foo.py" but not "foo/bar.py".  If
+        'anchor' is false, both of these will match.
+
+        If 'prefix' is supplied, then only filenames starting with 'prefix'
+        (itself a pattern) and ending with 'pattern', with anything in between
+        them, will match.  'anchor' is ignored in this case.
+
+        If 'is_regex' is true, 'anchor' and 'prefix' are ignored, and
+        'pattern' is assumed to be either a string containing a regex or a
+        regex object -- no translation is done, the regex is just compiled
+        and used as-is.
+
+        Selected strings will be added to self.files.
+
+        Return True if files are found.
+        """
+        # XXX docstring lying about what the special chars are?
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+
+        # delayed loading of allfiles list
+        if self.allfiles is None:
+            self.findall()
+
+        for name in self.allfiles:
+            if pattern_re.search(name):
+                self.files.add(name)
+                found = True
+        return found
+
+    def _exclude_pattern(self, pattern, anchor=True, prefix=None,
+                         is_regex=False):
+        """Remove strings (presumably filenames) from 'files' that match
+        'pattern'.
+
+        Other parameters are the same as for 'include_pattern()', above.
+        The list 'self.files' is modified in place. Return True if files are
+        found.
+
+        This API is public to allow e.g. exclusion of SCM subdirs, e.g. when
+        packaging source distributions
+        """
+        found = False
+        pattern_re = self._translate_pattern(pattern, anchor, prefix, is_regex)
+        for f in list(self.files):
+            if pattern_re.search(f):
+                self.files.remove(f)
+                found = True
+        return found
+
+    def _translate_pattern(self, pattern, anchor=True, prefix=None,
+                           is_regex=False):
+        """Translate a shell-like wildcard pattern to a compiled regular
+        expression.
+
+        Return the compiled regex.  If 'is_regex' true,
+        then 'pattern' is directly compiled to a regex (if it's a string)
+        or just returned as-is (assumes it's a regex object).
+        """
+        if is_regex:
+            if isinstance(pattern, str):
+                return re.compile(pattern)
+            else:
+                return pattern
+
+        if _PYTHON_VERSION > (3, 2):
+            # ditch start and end characters
+            start, _, end = self._glob_to_re('_').partition('_')
+
+        if pattern:
+            pattern_re = self._glob_to_re(pattern)
+            if _PYTHON_VERSION > (3, 2):
+                assert pattern_re.startswith(start) and pattern_re.endswith(end)
+        else:
+            pattern_re = ''
+
+        base = re.escape(os.path.join(self.base, ''))
+        if prefix is not None:
+            # ditch end of pattern character
+            if _PYTHON_VERSION <= (3, 2):
+                empty_pattern = self._glob_to_re('')
+                prefix_re = self._glob_to_re(prefix)[:-len(empty_pattern)]
+            else:
+                prefix_re = self._glob_to_re(prefix)
+                assert prefix_re.startswith(start) and prefix_re.endswith(end)
+                prefix_re = prefix_re[len(start): len(prefix_re) - len(end)]
+            sep = os.sep
+            if os.sep == '\\':
+                sep = r'\\'
+            if _PYTHON_VERSION <= (3, 2):
+                pattern_re = '^' + base + sep.join((prefix_re,
+                                                    '.*' + pattern_re))
+            else:
+                pattern_re = pattern_re[len(start): len(pattern_re) - len(end)]
+                pattern_re = r'%s%s%s%s.*%s%s' % (start, base, prefix_re, sep,
+                                                  pattern_re, end)
+        else:  # no prefix -- respect anchor flag
+            if anchor:
+                if _PYTHON_VERSION <= (3, 2):
+                    pattern_re = '^' + base + pattern_re
+                else:
+                    pattern_re = r'%s%s%s' % (start, base, pattern_re[len(start):])
+
+        return re.compile(pattern_re)
+
+    def _glob_to_re(self, pattern):
+        """Translate a shell-like glob pattern to a regular expression.
+
+        Return a string containing the regex.  Differs from
+        'fnmatch.translate()' in that '*' does not match "special characters"
+        (which are platform-specific).
+        """
+        pattern_re = fnmatch.translate(pattern)
+
+        # '?' and '*' in the glob pattern become '.' and '.*' in the RE, which
+        # IMHO is wrong -- '?' and '*' aren't supposed to match slash in Unix,
+        # and by extension they shouldn't match such "special characters" under
+        # any OS.  So change all non-escaped dots in the RE to match any
+        # character except the special characters (currently: just os.sep).
+        sep = os.sep
+        if os.sep == '\\':
+            # we're using a regex to manipulate a regex, so we need
+            # to escape the backslash twice
+            sep = r'\\\\'
+        escaped = r'\1[^%s]' % sep
+        pattern_re = re.sub(r'((?<!\\)(\\\\)*)\.', escaped, pattern_re)
+        return pattern_re
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/markers.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/markers.py
new file mode 100644
index 0000000..9dc6841
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/markers.py
@@ -0,0 +1,152 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Parser for the environment markers micro-language defined in PEP 508.
+"""
+
+# Note: In PEP 345, the micro-language was Python compatible, so the ast
+# module could be used to parse it. However, PEP 508 introduced operators such
+# as ~= and === which aren't in Python, necessitating a different approach.
+
+import os
+import re
+import sys
+import platform
+
+from .compat import string_types
+from .util import in_venv, parse_marker
+from .version import NormalizedVersion as NV
+
+__all__ = ['interpret']
+
+_VERSION_PATTERN = re.compile(r'((\d+(\.\d+)*\w*)|\'(\d+(\.\d+)*\w*)\'|\"(\d+(\.\d+)*\w*)\")')
+
+def _is_literal(o):
+    if not isinstance(o, string_types) or not o:
+        return False
+    return o[0] in '\'"'
+
+def _get_versions(s):
+    result = []
+    for m in _VERSION_PATTERN.finditer(s):
+        result.append(NV(m.groups()[0]))
+    return set(result)
+
+class Evaluator(object):
+    """
+    This class is used to evaluate marker expessions.
+    """
+
+    operations = {
+        '==': lambda x, y: x == y,
+        '===': lambda x, y: x == y,
+        '~=': lambda x, y: x == y or x > y,
+        '!=': lambda x, y: x != y,
+        '<':  lambda x, y: x < y,
+        '<=':  lambda x, y: x == y or x < y,
+        '>':  lambda x, y: x > y,
+        '>=':  lambda x, y: x == y or x > y,
+        'and': lambda x, y: x and y,
+        'or': lambda x, y: x or y,
+        'in': lambda x, y: x in y,
+        'not in': lambda x, y: x not in y,
+    }
+
+    def evaluate(self, expr, context):
+        """
+        Evaluate a marker expression returned by the :func:`parse_requirement`
+        function in the specified context.
+        """
+        if isinstance(expr, string_types):
+            if expr[0] in '\'"':
+                result = expr[1:-1]
+            else:
+                if expr not in context:
+                    raise SyntaxError('unknown variable: %s' % expr)
+                result = context[expr]
+        else:
+            assert isinstance(expr, dict)
+            op = expr['op']
+            if op not in self.operations:
+                raise NotImplementedError('op not implemented: %s' % op)
+            elhs = expr['lhs']
+            erhs = expr['rhs']
+            if _is_literal(expr['lhs']) and _is_literal(expr['rhs']):
+                raise SyntaxError('invalid comparison: %s %s %s' % (elhs, op, erhs))
+
+            lhs = self.evaluate(elhs, context)
+            rhs = self.evaluate(erhs, context)
+            if ((elhs == 'python_version' or erhs == 'python_version') and
+                op in ('<', '<=', '>', '>=', '===', '==', '!=', '~=')):
+                lhs = NV(lhs)
+                rhs = NV(rhs)
+            elif elhs == 'python_version' and op in ('in', 'not in'):
+                lhs = NV(lhs)
+                rhs = _get_versions(rhs)
+            result = self.operations[op](lhs, rhs)
+        return result
+
+_DIGITS = re.compile(r'\d+\.\d+')
+
+def default_context():
+    def format_full_version(info):
+        version = '%s.%s.%s' % (info.major, info.minor, info.micro)
+        kind = info.releaselevel
+        if kind != 'final':
+            version += kind[0] + str(info.serial)
+        return version
+
+    if hasattr(sys, 'implementation'):
+        implementation_version = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        implementation_version = '0'
+        implementation_name = ''
+
+    ppv = platform.python_version()
+    m = _DIGITS.match(ppv)
+    pv = m.group(0)
+    result = {
+        'implementation_name': implementation_name,
+        'implementation_version': implementation_version,
+        'os_name': os.name,
+        'platform_machine': platform.machine(),
+        'platform_python_implementation': platform.python_implementation(),
+        'platform_release': platform.release(),
+        'platform_system': platform.system(),
+        'platform_version': platform.version(),
+        'platform_in_venv': str(in_venv()),
+        'python_full_version': ppv,
+        'python_version': pv,
+        'sys_platform': sys.platform,
+    }
+    return result
+
+DEFAULT_CONTEXT = default_context()
+del default_context
+
+evaluator = Evaluator()
+
+def interpret(marker, execution_context=None):
+    """
+    Interpret a marker and return a result depending on environment.
+
+    :param marker: The marker to interpret.
+    :type marker: str
+    :param execution_context: The context used for name lookup.
+    :type execution_context: mapping
+    """
+    try:
+        expr, rest = parse_marker(marker)
+    except Exception as e:
+        raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
+    if rest and rest[0] != '#':
+        raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
+    context = dict(DEFAULT_CONTEXT)
+    if execution_context:
+        context.update(execution_context)
+    return evaluator.evaluate(expr, context)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/metadata.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/metadata.py
new file mode 100644
index 0000000..c329e19
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/metadata.py
@@ -0,0 +1,1076 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""Implementation of the Metadata for Python packages PEPs.
+
+Supports all metadata formats (1.0, 1.1, 1.2, 1.3/2.1 and 2.2).
+"""
+from __future__ import unicode_literals
+
+import codecs
+from email import message_from_file
+import json
+import logging
+import re
+
+
+from . import DistlibException, __version__
+from .compat import StringIO, string_types, text_type
+from .markers import interpret
+from .util import extract_by_key, get_extras
+from .version import get_scheme, PEP440_VERSION_RE
+
+logger = logging.getLogger(__name__)
+
+
+class MetadataMissingError(DistlibException):
+    """A required metadata is missing"""
+
+
+class MetadataConflictError(DistlibException):
+    """Attempt to read or write metadata fields that are conflictual."""
+
+
+class MetadataUnrecognizedVersionError(DistlibException):
+    """Unknown metadata version number."""
+
+
+class MetadataInvalidError(DistlibException):
+    """A metadata value is invalid"""
+
+# public API of this module
+__all__ = ['Metadata', 'PKG_INFO_ENCODING', 'PKG_INFO_PREFERRED_VERSION']
+
+# Encoding used for the PKG-INFO files
+PKG_INFO_ENCODING = 'utf-8'
+
+# preferred version. Hopefully will be changed
+# to 1.2 once PEP 345 is supported everywhere
+PKG_INFO_PREFERRED_VERSION = '1.1'
+
+_LINE_PREFIX_1_2 = re.compile('\n       \\|')
+_LINE_PREFIX_PRE_1_2 = re.compile('\n        ')
+_241_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License')
+
+_314_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'License', 'Classifier', 'Download-URL', 'Obsoletes',
+               'Provides', 'Requires')
+
+_314_MARKERS = ('Obsoletes', 'Provides', 'Requires', 'Classifier',
+                'Download-URL')
+
+_345_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External')
+
+_345_MARKERS = ('Provides-Dist', 'Requires-Dist', 'Requires-Python',
+                'Obsoletes-Dist', 'Requires-External', 'Maintainer',
+                'Maintainer-email', 'Project-URL')
+
+_426_FIELDS = ('Metadata-Version', 'Name', 'Version', 'Platform',
+               'Supported-Platform', 'Summary', 'Description',
+               'Keywords', 'Home-page', 'Author', 'Author-email',
+               'Maintainer', 'Maintainer-email', 'License',
+               'Classifier', 'Download-URL', 'Obsoletes-Dist',
+               'Project-URL', 'Provides-Dist', 'Requires-Dist',
+               'Requires-Python', 'Requires-External', 'Private-Version',
+               'Obsoleted-By', 'Setup-Requires-Dist', 'Extension',
+               'Provides-Extra')
+
+_426_MARKERS = ('Private-Version', 'Provides-Extra', 'Obsoleted-By',
+                'Setup-Requires-Dist', 'Extension')
+
+# See issue #106: Sometimes 'Requires' and 'Provides' occur wrongly in
+# the metadata. Include them in the tuple literal below to allow them
+# (for now).
+# Ditto for Obsoletes - see issue #140.
+_566_FIELDS = _426_FIELDS + ('Description-Content-Type',
+                             'Requires', 'Provides', 'Obsoletes')
+
+_566_MARKERS = ('Description-Content-Type',)
+
+_643_MARKERS = ('Dynamic', 'License-File')
+
+_643_FIELDS = _566_FIELDS + _643_MARKERS
+
+_ALL_FIELDS = set()
+_ALL_FIELDS.update(_241_FIELDS)
+_ALL_FIELDS.update(_314_FIELDS)
+_ALL_FIELDS.update(_345_FIELDS)
+_ALL_FIELDS.update(_426_FIELDS)
+_ALL_FIELDS.update(_566_FIELDS)
+_ALL_FIELDS.update(_643_FIELDS)
+
+EXTRA_RE = re.compile(r'''extra\s*==\s*("([^"]+)"|'([^']+)')''')
+
+
+def _version2fieldlist(version):
+    if version == '1.0':
+        return _241_FIELDS
+    elif version == '1.1':
+        return _314_FIELDS
+    elif version == '1.2':
+        return _345_FIELDS
+    elif version in ('1.3', '2.1'):
+        # avoid adding field names if already there
+        return _345_FIELDS + tuple(f for f in _566_FIELDS if f not in _345_FIELDS)
+    elif version == '2.0':
+        raise ValueError('Metadata 2.0 is withdrawn and not supported')
+        # return _426_FIELDS
+    elif version == '2.2':
+        return _643_FIELDS
+    raise MetadataUnrecognizedVersionError(version)
+
+
+def _best_version(fields):
+    """Detect the best version depending on the fields used."""
+    def _has_marker(keys, markers):
+        for marker in markers:
+            if marker in keys:
+                return True
+        return False
+
+    keys = []
+    for key, value in fields.items():
+        if value in ([], 'UNKNOWN', None):
+            continue
+        keys.append(key)
+
+    possible_versions = ['1.0', '1.1', '1.2', '1.3', '2.1', '2.2']  # 2.0 removed
+
+    # first let's try to see if a field is not part of one of the version
+    for key in keys:
+        if key not in _241_FIELDS and '1.0' in possible_versions:
+            possible_versions.remove('1.0')
+            logger.debug('Removed 1.0 due to %s', key)
+        if key not in _314_FIELDS and '1.1' in possible_versions:
+            possible_versions.remove('1.1')
+            logger.debug('Removed 1.1 due to %s', key)
+        if key not in _345_FIELDS and '1.2' in possible_versions:
+            possible_versions.remove('1.2')
+            logger.debug('Removed 1.2 due to %s', key)
+        if key not in _566_FIELDS and '1.3' in possible_versions:
+            possible_versions.remove('1.3')
+            logger.debug('Removed 1.3 due to %s', key)
+        if key not in _566_FIELDS and '2.1' in possible_versions:
+            if key != 'Description':  # In 2.1, description allowed after headers
+                possible_versions.remove('2.1')
+                logger.debug('Removed 2.1 due to %s', key)
+        if key not in _643_FIELDS and '2.2' in possible_versions:
+            possible_versions.remove('2.2')
+            logger.debug('Removed 2.2 due to %s', key)
+        # if key not in _426_FIELDS and '2.0' in possible_versions:
+            # possible_versions.remove('2.0')
+            # logger.debug('Removed 2.0 due to %s', key)
+
+    # possible_version contains qualified versions
+    if len(possible_versions) == 1:
+        return possible_versions[0]   # found !
+    elif len(possible_versions) == 0:
+        logger.debug('Out of options - unknown metadata set: %s', fields)
+        raise MetadataConflictError('Unknown metadata set')
+
+    # let's see if one unique marker is found
+    is_1_1 = '1.1' in possible_versions and _has_marker(keys, _314_MARKERS)
+    is_1_2 = '1.2' in possible_versions and _has_marker(keys, _345_MARKERS)
+    is_2_1 = '2.1' in possible_versions and _has_marker(keys, _566_MARKERS)
+    # is_2_0 = '2.0' in possible_versions and _has_marker(keys, _426_MARKERS)
+    is_2_2 = '2.2' in possible_versions and _has_marker(keys, _643_MARKERS)
+    if int(is_1_1) + int(is_1_2) + int(is_2_1) + int(is_2_2) > 1:
+        raise MetadataConflictError('You used incompatible 1.1/1.2/2.1/2.2 fields')
+
+    # we have the choice, 1.0, or 1.2, 2.1 or 2.2
+    #   - 1.0 has a broken Summary field but works with all tools
+    #   - 1.1 is to avoid
+    #   - 1.2 fixes Summary but has little adoption
+    #   - 2.1 adds more features
+    #   - 2.2 is the latest
+    if not is_1_1 and not is_1_2 and not is_2_1 and not is_2_2:
+        # we couldn't find any specific marker
+        if PKG_INFO_PREFERRED_VERSION in possible_versions:
+            return PKG_INFO_PREFERRED_VERSION
+    if is_1_1:
+        return '1.1'
+    if is_1_2:
+        return '1.2'
+    if is_2_1:
+        return '2.1'
+    # if is_2_2:
+        # return '2.2'
+
+    return '2.2'
+
+# This follows the rules about transforming keys as described in
+# https://www.python.org/dev/peps/pep-0566/#id17
+_ATTR2FIELD = {
+    name.lower().replace("-", "_"): name for name in _ALL_FIELDS
+}
+_FIELD2ATTR = {field: attr for attr, field in _ATTR2FIELD.items()}
+
+_PREDICATE_FIELDS = ('Requires-Dist', 'Obsoletes-Dist', 'Provides-Dist')
+_VERSIONS_FIELDS = ('Requires-Python',)
+_VERSION_FIELDS = ('Version',)
+_LISTFIELDS = ('Platform', 'Classifier', 'Obsoletes',
+               'Requires', 'Provides', 'Obsoletes-Dist',
+               'Provides-Dist', 'Requires-Dist', 'Requires-External',
+               'Project-URL', 'Supported-Platform', 'Setup-Requires-Dist',
+               'Provides-Extra', 'Extension', 'License-File')
+_LISTTUPLEFIELDS = ('Project-URL',)
+
+_ELEMENTSFIELD = ('Keywords',)
+
+_UNICODEFIELDS = ('Author', 'Maintainer', 'Summary', 'Description')
+
+_MISSING = object()
+
+_FILESAFE = re.compile('[^A-Za-z0-9.]+')
+
+
+def _get_name_and_version(name, version, for_filename=False):
+    """Return the distribution name with version.
+
+    If for_filename is true, return a filename-escaped form."""
+    if for_filename:
+        # For both name and version any runs of non-alphanumeric or '.'
+        # characters are replaced with a single '-'.  Additionally any
+        # spaces in the version string become '.'
+        name = _FILESAFE.sub('-', name)
+        version = _FILESAFE.sub('-', version.replace(' ', '.'))
+    return '%s-%s' % (name, version)
+
+
+class LegacyMetadata(object):
+    """The legacy metadata of a release.
+
+    Supports versions 1.0, 1.1, 1.2, 2.0 and 1.3/2.1 (auto-detected). You can
+    instantiate the class with one of these arguments (or none):
+    - *path*, the path to a metadata file
+    - *fileobj* give a file-like object with metadata as content
+    - *mapping* is a dict-like object
+    - *scheme* is a version scheme name
+    """
+    # TODO document the mapping API and UNKNOWN default key
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._fields = {}
+        self.requires_files = []
+        self._dependencies = None
+        self.scheme = scheme
+        if path is not None:
+            self.read(path)
+        elif fileobj is not None:
+            self.read_file(fileobj)
+        elif mapping is not None:
+            self.update(mapping)
+            self.set_metadata_version()
+
+    def set_metadata_version(self):
+        self._fields['Metadata-Version'] = _best_version(self._fields)
+
+    def _write_field(self, fileobj, name, value):
+        fileobj.write('%s: %s\n' % (name, value))
+
+    def __getitem__(self, name):
+        return self.get(name)
+
+    def __setitem__(self, name, value):
+        return self.set(name, value)
+
+    def __delitem__(self, name):
+        field_name = self._convert_name(name)
+        try:
+            del self._fields[field_name]
+        except KeyError:
+            raise KeyError(name)
+
+    def __contains__(self, name):
+        return (name in self._fields or
+                self._convert_name(name) in self._fields)
+
+    def _convert_name(self, name):
+        if name in _ALL_FIELDS:
+            return name
+        name = name.replace('-', '_').lower()
+        return _ATTR2FIELD.get(name, name)
+
+    def _default_value(self, name):
+        if name in _LISTFIELDS or name in _ELEMENTSFIELD:
+            return []
+        return 'UNKNOWN'
+
+    def _remove_line_prefix(self, value):
+        if self.metadata_version in ('1.0', '1.1'):
+            return _LINE_PREFIX_PRE_1_2.sub('\n', value)
+        else:
+            return _LINE_PREFIX_1_2.sub('\n', value)
+
+    def __getattr__(self, name):
+        if name in _ATTR2FIELD:
+            return self[name]
+        raise AttributeError(name)
+
+    #
+    # Public API
+    #
+
+#    dependencies = property(_get_dependencies, _set_dependencies)
+
+    def get_fullname(self, filesafe=False):
+        """Return the distribution name with version.
+
+        If filesafe is true, return a filename-escaped form."""
+        return _get_name_and_version(self['Name'], self['Version'], filesafe)
+
+    def is_field(self, name):
+        """return True if name is a valid metadata key"""
+        name = self._convert_name(name)
+        return name in _ALL_FIELDS
+
+    def is_multi_field(self, name):
+        name = self._convert_name(name)
+        return name in _LISTFIELDS
+
+    def read(self, filepath):
+        """Read the metadata values from a file path."""
+        fp = codecs.open(filepath, 'r', encoding='utf-8')
+        try:
+            self.read_file(fp)
+        finally:
+            fp.close()
+
+    def read_file(self, fileob):
+        """Read the metadata values from a file object."""
+        msg = message_from_file(fileob)
+        self._fields['Metadata-Version'] = msg['metadata-version']
+
+        # When reading, get all the fields we can
+        for field in _ALL_FIELDS:
+            if field not in msg:
+                continue
+            if field in _LISTFIELDS:
+                # we can have multiple lines
+                values = msg.get_all(field)
+                if field in _LISTTUPLEFIELDS and values is not None:
+                    values = [tuple(value.split(',')) for value in values]
+                self.set(field, values)
+            else:
+                # single line
+                value = msg[field]
+                if value is not None and value != 'UNKNOWN':
+                    self.set(field, value)
+
+        # PEP 566 specifies that the body be used for the description, if
+        # available
+        body = msg.get_payload()
+        self["Description"] = body if body else self["Description"]
+        # logger.debug('Attempting to set metadata for %s', self)
+        # self.set_metadata_version()
+
+    def write(self, filepath, skip_unknown=False):
+        """Write the metadata fields to filepath."""
+        fp = codecs.open(filepath, 'w', encoding='utf-8')
+        try:
+            self.write_file(fp, skip_unknown)
+        finally:
+            fp.close()
+
+    def write_file(self, fileobject, skip_unknown=False):
+        """Write the PKG-INFO format data to a file object."""
+        self.set_metadata_version()
+
+        for field in _version2fieldlist(self['Metadata-Version']):
+            values = self.get(field)
+            if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']):
+                continue
+            if field in _ELEMENTSFIELD:
+                self._write_field(fileobject, field, ','.join(values))
+                continue
+            if field not in _LISTFIELDS:
+                if field == 'Description':
+                    if self.metadata_version in ('1.0', '1.1'):
+                        values = values.replace('\n', '\n        ')
+                    else:
+                        values = values.replace('\n', '\n       |')
+                values = [values]
+
+            if field in _LISTTUPLEFIELDS:
+                values = [','.join(value) for value in values]
+
+            for value in values:
+                self._write_field(fileobject, field, value)
+
+    def update(self, other=None, **kwargs):
+        """Set metadata values from the given iterable `other` and kwargs.
+
+        Behavior is like `dict.update`: If `other` has a ``keys`` method,
+        they are looped over and ``self[key]`` is assigned ``other[key]``.
+        Else, ``other`` is an iterable of ``(key, value)`` iterables.
+
+        Keys that don't match a metadata field or that have an empty value are
+        dropped.
+        """
+        def _set(key, value):
+            if key in _ATTR2FIELD and value:
+                self.set(self._convert_name(key), value)
+
+        if not other:
+            # other is None or empty container
+            pass
+        elif hasattr(other, 'keys'):
+            for k in other.keys():
+                _set(k, other[k])
+        else:
+            for k, v in other:
+                _set(k, v)
+
+        if kwargs:
+            for k, v in kwargs.items():
+                _set(k, v)
+
+    def set(self, name, value):
+        """Control then set a metadata field."""
+        name = self._convert_name(name)
+
+        if ((name in _ELEMENTSFIELD or name == 'Platform') and
+            not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [v.strip() for v in value.split(',')]
+            else:
+                value = []
+        elif (name in _LISTFIELDS and
+              not isinstance(value, (list, tuple))):
+            if isinstance(value, string_types):
+                value = [value]
+            else:
+                value = []
+
+        if logger.isEnabledFor(logging.WARNING):
+            project_name = self['Name']
+
+            scheme = get_scheme(self.scheme)
+            if name in _PREDICATE_FIELDS and value is not None:
+                for v in value:
+                    # check that the values are valid
+                    if not scheme.is_valid_matcher(v.split(';')[0]):
+                        logger.warning(
+                            "'%s': '%s' is not valid (field '%s')",
+                            project_name, v, name)
+            # FIXME this rejects UNKNOWN, is that right?
+            elif name in _VERSIONS_FIELDS and value is not None:
+                if not scheme.is_valid_constraint_list(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+            elif name in _VERSION_FIELDS and value is not None:
+                if not scheme.is_valid_version(value):
+                    logger.warning("'%s': '%s' is not a valid version (field '%s')",
+                                   project_name, value, name)
+
+        if name in _UNICODEFIELDS:
+            if name == 'Description':
+                value = self._remove_line_prefix(value)
+
+        self._fields[name] = value
+
+    def get(self, name, default=_MISSING):
+        """Get a metadata field."""
+        name = self._convert_name(name)
+        if name not in self._fields:
+            if default is _MISSING:
+                default = self._default_value(name)
+            return default
+        if name in _UNICODEFIELDS:
+            value = self._fields[name]
+            return value
+        elif name in _LISTFIELDS:
+            value = self._fields[name]
+            if value is None:
+                return []
+            res = []
+            for val in value:
+                if name not in _LISTTUPLEFIELDS:
+                    res.append(val)
+                else:
+                    # That's for Project-URL
+                    res.append((val[0], val[1]))
+            return res
+
+        elif name in _ELEMENTSFIELD:
+            value = self._fields[name]
+            if isinstance(value, string_types):
+                return value.split(',')
+        return self._fields[name]
+
+    def check(self, strict=False):
+        """Check if the metadata is compliant. If strict is True then raise if
+        no Name or Version are provided"""
+        self.set_metadata_version()
+
+        # XXX should check the versions (if the file was loaded)
+        missing, warnings = [], []
+
+        for attr in ('Name', 'Version'):  # required by PEP 345
+            if attr not in self:
+                missing.append(attr)
+
+        if strict and missing != []:
+            msg = 'missing required metadata: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+
+        for attr in ('Home-page', 'Author'):
+            if attr not in self:
+                missing.append(attr)
+
+        # checking metadata 1.2 (XXX needs to check 1.1, 1.0)
+        if self['Metadata-Version'] != '1.2':
+            return missing, warnings
+
+        scheme = get_scheme(self.scheme)
+
+        def are_valid_constraints(value):
+            for v in value:
+                if not scheme.is_valid_matcher(v.split(';')[0]):
+                    return False
+            return True
+
+        for fields, controller in ((_PREDICATE_FIELDS, are_valid_constraints),
+                                   (_VERSIONS_FIELDS,
+                                    scheme.is_valid_constraint_list),
+                                   (_VERSION_FIELDS,
+                                    scheme.is_valid_version)):
+            for field in fields:
+                value = self.get(field, None)
+                if value is not None and not controller(value):
+                    warnings.append("Wrong value for '%s': %s" % (field, value))
+
+        return missing, warnings
+
+    def todict(self, skip_missing=False):
+        """Return fields as a dict.
+
+        Field names will be converted to use the underscore-lowercase style
+        instead of hyphen-mixed case (i.e. home_page instead of Home-page).
+        This is as per https://www.python.org/dev/peps/pep-0566/#id17.
+        """
+        self.set_metadata_version()
+
+        fields = _version2fieldlist(self['Metadata-Version'])
+
+        data = {}
+
+        for field_name in fields:
+            if not skip_missing or field_name in self._fields:
+                key = _FIELD2ATTR[field_name]
+                if key != 'project_url':
+                    data[key] = self[field_name]
+                else:
+                    data[key] = [','.join(u) for u in self[field_name]]
+
+        return data
+
+    def add_requirements(self, requirements):
+        if self['Metadata-Version'] == '1.1':
+            # we can't have 1.1 metadata *and* Setuptools requires
+            for field in ('Obsoletes', 'Requires', 'Provides'):
+                if field in self:
+                    del self[field]
+        self['Requires-Dist'] += requirements
+
+    # Mapping API
+    # TODO could add iter* variants
+
+    def keys(self):
+        return list(_version2fieldlist(self['Metadata-Version']))
+
+    def __iter__(self):
+        for key in self.keys():
+            yield key
+
+    def values(self):
+        return [self[key] for key in self.keys()]
+
+    def items(self):
+        return [(key, self[key]) for key in self.keys()]
+
+    def __repr__(self):
+        return '<%s %s %s>' % (self.__class__.__name__, self.name,
+                               self.version)
+
+
+METADATA_FILENAME = 'pydist.json'
+WHEEL_METADATA_FILENAME = 'metadata.json'
+LEGACY_METADATA_FILENAME = 'METADATA'
+
+
+class Metadata(object):
+    """
+    The metadata of a release. This implementation uses 2.1
+    metadata where possible. If not possible, it wraps a LegacyMetadata
+    instance which handles the key-value metadata format.
+    """
+
+    METADATA_VERSION_MATCHER = re.compile(r'^\d+(\.\d+)*$')
+
+    NAME_MATCHER = re.compile('^[0-9A-Z]([0-9A-Z_.-]*[0-9A-Z])?$', re.I)
+
+    FIELDNAME_MATCHER = re.compile('^[A-Z]([0-9A-Z-]*[0-9A-Z])?$', re.I)
+
+    VERSION_MATCHER = PEP440_VERSION_RE
+
+    SUMMARY_MATCHER = re.compile('.{1,2047}')
+
+    METADATA_VERSION = '2.0'
+
+    GENERATOR = 'distlib (%s)' % __version__
+
+    MANDATORY_KEYS = {
+        'name': (),
+        'version': (),
+        'summary': ('legacy',),
+    }
+
+    INDEX_KEYS = ('name version license summary description author '
+                  'author_email keywords platform home_page classifiers '
+                  'download_url')
+
+    DEPENDENCY_KEYS = ('extras run_requires test_requires build_requires '
+                       'dev_requires provides meta_requires obsoleted_by '
+                       'supports_environments')
+
+    SYNTAX_VALIDATORS = {
+        'metadata_version': (METADATA_VERSION_MATCHER, ()),
+        'name': (NAME_MATCHER, ('legacy',)),
+        'version': (VERSION_MATCHER, ('legacy',)),
+        'summary': (SUMMARY_MATCHER, ('legacy',)),
+        'dynamic': (FIELDNAME_MATCHER, ('legacy',)),
+    }
+
+    __slots__ = ('_legacy', '_data', 'scheme')
+
+    def __init__(self, path=None, fileobj=None, mapping=None,
+                 scheme='default'):
+        if [path, fileobj, mapping].count(None) < 2:
+            raise TypeError('path, fileobj and mapping are exclusive')
+        self._legacy = None
+        self._data = None
+        self.scheme = scheme
+        #import pdb; pdb.set_trace()
+        if mapping is not None:
+            try:
+                self._validate_mapping(mapping, scheme)
+                self._data = mapping
+            except MetadataUnrecognizedVersionError:
+                self._legacy = LegacyMetadata(mapping=mapping, scheme=scheme)
+                self.validate()
+        else:
+            data = None
+            if path:
+                with open(path, 'rb') as f:
+                    data = f.read()
+            elif fileobj:
+                data = fileobj.read()
+            if data is None:
+                # Initialised with no args - to be added
+                self._data = {
+                    'metadata_version': self.METADATA_VERSION,
+                    'generator': self.GENERATOR,
+                }
+            else:
+                if not isinstance(data, text_type):
+                    data = data.decode('utf-8')
+                try:
+                    self._data = json.loads(data)
+                    self._validate_mapping(self._data, scheme)
+                except ValueError:
+                    # Note: MetadataUnrecognizedVersionError does not
+                    # inherit from ValueError (it's a DistlibException,
+                    # which should not inherit from ValueError).
+                    # The ValueError comes from the json.load - if that
+                    # succeeds and we get a validation error, we want
+                    # that to propagate
+                    self._legacy = LegacyMetadata(fileobj=StringIO(data),
+                                                  scheme=scheme)
+                    self.validate()
+
+    common_keys = set(('name', 'version', 'license', 'keywords', 'summary'))
+
+    none_list = (None, list)
+    none_dict = (None, dict)
+
+    mapped_keys = {
+        'run_requires': ('Requires-Dist', list),
+        'build_requires': ('Setup-Requires-Dist', list),
+        'dev_requires': none_list,
+        'test_requires': none_list,
+        'meta_requires': none_list,
+        'extras': ('Provides-Extra', list),
+        'modules': none_list,
+        'namespaces': none_list,
+        'exports': none_dict,
+        'commands': none_dict,
+        'classifiers': ('Classifier', list),
+        'source_url': ('Download-URL', None),
+        'metadata_version': ('Metadata-Version', None),
+    }
+
+    del none_list, none_dict
+
+    def __getattribute__(self, key):
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, maker = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    result = None if maker is None else maker()
+                else:
+                    result = self._legacy.get(lk)
+            else:
+                value = None if maker is None else maker()
+                if key not in ('commands', 'exports', 'modules', 'namespaces',
+                               'classifiers'):
+                    result = self._data.get(key, value)
+                else:
+                    # special cases for PEP 459
+                    sentinel = object()
+                    result = sentinel
+                    d = self._data.get('extensions')
+                    if d:
+                        if key == 'commands':
+                            result = d.get('python.commands', value)
+                        elif key == 'classifiers':
+                            d = d.get('python.details')
+                            if d:
+                                result = d.get(key, value)
+                        else:
+                            d = d.get('python.exports')
+                            if not d:
+                                d = self._data.get('python.exports')
+                            if d:
+                                result = d.get(key, value)
+                    if result is sentinel:
+                        result = value
+        elif key not in common:
+            result = object.__getattribute__(self, key)
+        elif self._legacy:
+            result = self._legacy.get(key)
+        else:
+            result = self._data.get(key)
+        return result
+
+    def _validate_value(self, key, value, scheme=None):
+        if key in self.SYNTAX_VALIDATORS:
+            pattern, exclusions = self.SYNTAX_VALIDATORS[key]
+            if (scheme or self.scheme) not in exclusions:
+                m = pattern.match(value)
+                if not m:
+                    raise MetadataInvalidError("'%s' is an invalid value for "
+                                               "the '%s' property" % (value,
+                                                                    key))
+
+    def __setattr__(self, key, value):
+        self._validate_value(key, value)
+        common = object.__getattribute__(self, 'common_keys')
+        mapped = object.__getattribute__(self, 'mapped_keys')
+        if key in mapped:
+            lk, _ = mapped[key]
+            if self._legacy:
+                if lk is None:
+                    raise NotImplementedError
+                self._legacy[lk] = value
+            elif key not in ('commands', 'exports', 'modules', 'namespaces',
+                             'classifiers'):
+                self._data[key] = value
+            else:
+                # special cases for PEP 459
+                d = self._data.setdefault('extensions', {})
+                if key == 'commands':
+                    d['python.commands'] = value
+                elif key == 'classifiers':
+                    d = d.setdefault('python.details', {})
+                    d[key] = value
+                else:
+                    d = d.setdefault('python.exports', {})
+                    d[key] = value
+        elif key not in common:
+            object.__setattr__(self, key, value)
+        else:
+            if key == 'keywords':
+                if isinstance(value, string_types):
+                    value = value.strip()
+                    if value:
+                        value = value.split()
+                    else:
+                        value = []
+            if self._legacy:
+                self._legacy[key] = value
+            else:
+                self._data[key] = value
+
+    @property
+    def name_and_version(self):
+        return _get_name_and_version(self.name, self.version, True)
+
+    @property
+    def provides(self):
+        if self._legacy:
+            result = self._legacy['Provides-Dist']
+        else:
+            result = self._data.setdefault('provides', [])
+        s = '%s (%s)' % (self.name, self.version)
+        if s not in result:
+            result.append(s)
+        return result
+
+    @provides.setter
+    def provides(self, value):
+        if self._legacy:
+            self._legacy['Provides-Dist'] = value
+        else:
+            self._data['provides'] = value
+
+    def get_requirements(self, reqts, extras=None, env=None):
+        """
+        Base method to get dependencies, given a set of extras
+        to satisfy and an optional environment context.
+        :param reqts: A list of sometimes-wanted dependencies,
+                      perhaps dependent on extras and environment.
+        :param extras: A list of optional components being requested.
+        :param env: An optional environment for marker evaluation.
+        """
+        if self._legacy:
+            result = reqts
+        else:
+            result = []
+            extras = get_extras(extras or [], self.extras)
+            for d in reqts:
+                if 'extra' not in d and 'environment' not in d:
+                    # unconditional
+                    include = True
+                else:
+                    if 'extra' not in d:
+                        # Not extra-dependent - only environment-dependent
+                        include = True
+                    else:
+                        include = d.get('extra') in extras
+                    if include:
+                        # Not excluded because of extras, check environment
+                        marker = d.get('environment')
+                        if marker:
+                            include = interpret(marker, env)
+                if include:
+                    result.extend(d['requires'])
+            for key in ('build', 'dev', 'test'):
+                e = ':%s:' % key
+                if e in extras:
+                    extras.remove(e)
+                    # A recursive call, but it should terminate since 'test'
+                    # has been removed from the extras
+                    reqts = self._data.get('%s_requires' % key, [])
+                    result.extend(self.get_requirements(reqts, extras=extras,
+                                                        env=env))
+        return result
+
+    @property
+    def dictionary(self):
+        if self._legacy:
+            return self._from_legacy()
+        return self._data
+
+    @property
+    def dependencies(self):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            return extract_by_key(self._data, self.DEPENDENCY_KEYS)
+
+    @dependencies.setter
+    def dependencies(self, value):
+        if self._legacy:
+            raise NotImplementedError
+        else:
+            self._data.update(value)
+
+    def _validate_mapping(self, mapping, scheme):
+        if mapping.get('metadata_version') != self.METADATA_VERSION:
+            raise MetadataUnrecognizedVersionError()
+        missing = []
+        for key, exclusions in self.MANDATORY_KEYS.items():
+            if key not in mapping:
+                if scheme not in exclusions:
+                    missing.append(key)
+        if missing:
+            msg = 'Missing metadata items: %s' % ', '.join(missing)
+            raise MetadataMissingError(msg)
+        for k, v in mapping.items():
+            self._validate_value(k, v, scheme)
+
+    def validate(self):
+        if self._legacy:
+            missing, warnings = self._legacy.check(True)
+            if missing or warnings:
+                logger.warning('Metadata: missing: %s, warnings: %s',
+                               missing, warnings)
+        else:
+            self._validate_mapping(self._data, self.scheme)
+
+    def todict(self):
+        if self._legacy:
+            return self._legacy.todict(True)
+        else:
+            result = extract_by_key(self._data, self.INDEX_KEYS)
+            return result
+
+    def _from_legacy(self):
+        assert self._legacy and not self._data
+        result = {
+            'metadata_version': self.METADATA_VERSION,
+            'generator': self.GENERATOR,
+        }
+        lmd = self._legacy.todict(True)     # skip missing ones
+        for k in ('name', 'version', 'license', 'summary', 'description',
+                  'classifier'):
+            if k in lmd:
+                if k == 'classifier':
+                    nk = 'classifiers'
+                else:
+                    nk = k
+                result[nk] = lmd[k]
+        kw = lmd.get('Keywords', [])
+        if kw == ['']:
+            kw = []
+        result['keywords'] = kw
+        keys = (('requires_dist', 'run_requires'),
+                ('setup_requires_dist', 'build_requires'))
+        for ok, nk in keys:
+            if ok in lmd and lmd[ok]:
+                result[nk] = [{'requires': lmd[ok]}]
+        result['provides'] = self.provides
+        author = {}
+        maintainer = {}
+        return result
+
+    LEGACY_MAPPING = {
+        'name': 'Name',
+        'version': 'Version',
+        ('extensions', 'python.details', 'license'): 'License',
+        'summary': 'Summary',
+        'description': 'Description',
+        ('extensions', 'python.project', 'project_urls', 'Home'): 'Home-page',
+        ('extensions', 'python.project', 'contacts', 0, 'name'): 'Author',
+        ('extensions', 'python.project', 'contacts', 0, 'email'): 'Author-email',
+        'source_url': 'Download-URL',
+        ('extensions', 'python.details', 'classifiers'): 'Classifier',
+    }
+
+    def _to_legacy(self):
+        def process_entries(entries):
+            reqts = set()
+            for e in entries:
+                extra = e.get('extra')
+                env = e.get('environment')
+                rlist = e['requires']
+                for r in rlist:
+                    if not env and not extra:
+                        reqts.add(r)
+                    else:
+                        marker = ''
+                        if extra:
+                            marker = 'extra == "%s"' % extra
+                        if env:
+                            if marker:
+                                marker = '(%s) and %s' % (env, marker)
+                            else:
+                                marker = env
+                        reqts.add(';'.join((r, marker)))
+            return reqts
+
+        assert self._data and not self._legacy
+        result = LegacyMetadata()
+        nmd = self._data
+        # import pdb; pdb.set_trace()
+        for nk, ok in self.LEGACY_MAPPING.items():
+            if not isinstance(nk, tuple):
+                if nk in nmd:
+                    result[ok] = nmd[nk]
+            else:
+                d = nmd
+                found = True
+                for k in nk:
+                    try:
+                        d = d[k]
+                    except (KeyError, IndexError):
+                        found = False
+                        break
+                if found:
+                    result[ok] = d
+        r1 = process_entries(self.run_requires + self.meta_requires)
+        r2 = process_entries(self.build_requires + self.dev_requires)
+        if self.extras:
+            result['Provides-Extra'] = sorted(self.extras)
+        result['Requires-Dist'] = sorted(r1)
+        result['Setup-Requires-Dist'] = sorted(r2)
+        # TODO: any other fields wanted
+        return result
+
+    def write(self, path=None, fileobj=None, legacy=False, skip_unknown=True):
+        if [path, fileobj].count(None) != 1:
+            raise ValueError('Exactly one of path and fileobj is needed')
+        self.validate()
+        if legacy:
+            if self._legacy:
+                legacy_md = self._legacy
+            else:
+                legacy_md = self._to_legacy()
+            if path:
+                legacy_md.write(path, skip_unknown=skip_unknown)
+            else:
+                legacy_md.write_file(fileobj, skip_unknown=skip_unknown)
+        else:
+            if self._legacy:
+                d = self._from_legacy()
+            else:
+                d = self._data
+            if fileobj:
+                json.dump(d, fileobj, ensure_ascii=True, indent=2,
+                          sort_keys=True)
+            else:
+                with codecs.open(path, 'w', 'utf-8') as f:
+                    json.dump(d, f, ensure_ascii=True, indent=2,
+                              sort_keys=True)
+
+    def add_requirements(self, requirements):
+        if self._legacy:
+            self._legacy.add_requirements(requirements)
+        else:
+            run_requires = self._data.setdefault('run_requires', [])
+            always = None
+            for entry in run_requires:
+                if 'environment' not in entry and 'extra' not in entry:
+                    always = entry
+                    break
+            if always is None:
+                always = { 'requires': requirements }
+                run_requires.insert(0, always)
+            else:
+                rset = set(always['requires']) | set(requirements)
+                always['requires'] = sorted(rset)
+
+    def __repr__(self):
+        name = self.name or '(no name)'
+        version = self.version or 'no version'
+        return '<%s %s %s (%s)>' % (self.__class__.__name__,
+                                    self.metadata_version, name, version)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/resources.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/resources.py
new file mode 100644
index 0000000..fef52aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/resources.py
@@ -0,0 +1,358 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2017 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import bisect
+import io
+import logging
+import os
+import pkgutil
+import sys
+import types
+import zipimport
+
+from . import DistlibException
+from .util import cached_property, get_cache_base, Cache
+
+logger = logging.getLogger(__name__)
+
+
+cache = None    # created when needed
+
+
+class ResourceCache(Cache):
+    def __init__(self, base=None):
+        if base is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('resource-cache'))
+        super(ResourceCache, self).__init__(base)
+
+    def is_stale(self, resource, path):
+        """
+        Is the cache stale for the given resource?
+
+        :param resource: The :class:`Resource` being cached.
+        :param path: The path of the resource in the cache.
+        :return: True if the cache is stale.
+        """
+        # Cache invalidation is a hard problem :-)
+        return True
+
+    def get(self, resource):
+        """
+        Get a resource into the cache,
+
+        :param resource: A :class:`Resource` instance.
+        :return: The pathname of the resource in the cache.
+        """
+        prefix, path = resource.finder.get_cache_info(resource)
+        if prefix is None:
+            result = path
+        else:
+            result = os.path.join(self.base, self.prefix_to_dir(prefix), path)
+            dirname = os.path.dirname(result)
+            if not os.path.isdir(dirname):
+                os.makedirs(dirname)
+            if not os.path.exists(result):
+                stale = True
+            else:
+                stale = self.is_stale(resource, path)
+            if stale:
+                # write the bytes of the resource to the cache location
+                with open(result, 'wb') as f:
+                    f.write(resource.bytes)
+        return result
+
+
+class ResourceBase(object):
+    def __init__(self, finder, name):
+        self.finder = finder
+        self.name = name
+
+
+class Resource(ResourceBase):
+    """
+    A class representing an in-package resource, such as a data file. This is
+    not normally instantiated by user code, but rather by a
+    :class:`ResourceFinder` which manages the resource.
+    """
+    is_container = False        # Backwards compatibility
+
+    def as_stream(self):
+        """
+        Get the resource as a stream.
+
+        This is not a property to make it obvious that it returns a new stream
+        each time.
+        """
+        return self.finder.get_stream(self)
+
+    @cached_property
+    def file_path(self):
+        global cache
+        if cache is None:
+            cache = ResourceCache()
+        return cache.get(self)
+
+    @cached_property
+    def bytes(self):
+        return self.finder.get_bytes(self)
+
+    @cached_property
+    def size(self):
+        return self.finder.get_size(self)
+
+
+class ResourceContainer(ResourceBase):
+    is_container = True     # Backwards compatibility
+
+    @cached_property
+    def resources(self):
+        return self.finder.get_resources(self)
+
+
+class ResourceFinder(object):
+    """
+    Resource finder for file system resources.
+    """
+
+    if sys.platform.startswith('java'):
+        skipped_extensions = ('.pyc', '.pyo', '.class')
+    else:
+        skipped_extensions = ('.pyc', '.pyo')
+
+    def __init__(self, module):
+        self.module = module
+        self.loader = getattr(module, '__loader__', None)
+        self.base = os.path.dirname(getattr(module, '__file__', ''))
+
+    def _adjust_path(self, path):
+        return os.path.realpath(path)
+
+    def _make_path(self, resource_name):
+        # Issue #50: need to preserve type of path on Python 2.x
+        # like os.path._get_sep
+        if isinstance(resource_name, bytes):    # should only happen on 2.x
+            sep = b'/'
+        else:
+            sep = '/'
+        parts = resource_name.split(sep)
+        parts.insert(0, self.base)
+        result = os.path.join(*parts)
+        return self._adjust_path(result)
+
+    def _find(self, path):
+        return os.path.exists(path)
+
+    def get_cache_info(self, resource):
+        return None, resource.path
+
+    def find(self, resource_name):
+        path = self._make_path(resource_name)
+        if not self._find(path):
+            result = None
+        else:
+            if self._is_directory(path):
+                result = ResourceContainer(self, resource_name)
+            else:
+                result = Resource(self, resource_name)
+            result.path = path
+        return result
+
+    def get_stream(self, resource):
+        return open(resource.path, 'rb')
+
+    def get_bytes(self, resource):
+        with open(resource.path, 'rb') as f:
+            return f.read()
+
+    def get_size(self, resource):
+        return os.path.getsize(resource.path)
+
+    def get_resources(self, resource):
+        def allowed(f):
+            return (f != '__pycache__' and not
+                    f.endswith(self.skipped_extensions))
+        return set([f for f in os.listdir(resource.path) if allowed(f)])
+
+    def is_container(self, resource):
+        return self._is_directory(resource.path)
+
+    _is_directory = staticmethod(os.path.isdir)
+
+    def iterator(self, resource_name):
+        resource = self.find(resource_name)
+        if resource is not None:
+            todo = [resource]
+            while todo:
+                resource = todo.pop(0)
+                yield resource
+                if resource.is_container:
+                    rname = resource.name
+                    for name in resource.resources:
+                        if not rname:
+                            new_name = name
+                        else:
+                            new_name = '/'.join([rname, name])
+                        child = self.find(new_name)
+                        if child.is_container:
+                            todo.append(child)
+                        else:
+                            yield child
+
+
+class ZipResourceFinder(ResourceFinder):
+    """
+    Resource finder for resources in .zip files.
+    """
+    def __init__(self, module):
+        super(ZipResourceFinder, self).__init__(module)
+        archive = self.loader.archive
+        self.prefix_len = 1 + len(archive)
+        # PyPy doesn't have a _files attr on zipimporter, and you can't set one
+        if hasattr(self.loader, '_files'):
+            self._files = self.loader._files
+        else:
+            self._files = zipimport._zip_directory_cache[archive]
+        self.index = sorted(self._files)
+
+    def _adjust_path(self, path):
+        return path
+
+    def _find(self, path):
+        path = path[self.prefix_len:]
+        if path in self._files:
+            result = True
+        else:
+            if path and path[-1] != os.sep:
+                path = path + os.sep
+            i = bisect.bisect(self.index, path)
+            try:
+                result = self.index[i].startswith(path)
+            except IndexError:
+                result = False
+        if not result:
+            logger.debug('_find failed: %r %r', path, self.loader.prefix)
+        else:
+            logger.debug('_find worked: %r %r', path, self.loader.prefix)
+        return result
+
+    def get_cache_info(self, resource):
+        prefix = self.loader.archive
+        path = resource.path[1 + len(prefix):]
+        return prefix, path
+
+    def get_bytes(self, resource):
+        return self.loader.get_data(resource.path)
+
+    def get_stream(self, resource):
+        return io.BytesIO(self.get_bytes(resource))
+
+    def get_size(self, resource):
+        path = resource.path[self.prefix_len:]
+        return self._files[path][3]
+
+    def get_resources(self, resource):
+        path = resource.path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        plen = len(path)
+        result = set()
+        i = bisect.bisect(self.index, path)
+        while i < len(self.index):
+            if not self.index[i].startswith(path):
+                break
+            s = self.index[i][plen:]
+            result.add(s.split(os.sep, 1)[0])   # only immediate children
+            i += 1
+        return result
+
+    def _is_directory(self, path):
+        path = path[self.prefix_len:]
+        if path and path[-1] != os.sep:
+            path += os.sep
+        i = bisect.bisect(self.index, path)
+        try:
+            result = self.index[i].startswith(path)
+        except IndexError:
+            result = False
+        return result
+
+
+_finder_registry = {
+    type(None): ResourceFinder,
+    zipimport.zipimporter: ZipResourceFinder
+}
+
+try:
+    # In Python 3.6, _frozen_importlib -> _frozen_importlib_external
+    try:
+        import _frozen_importlib_external as _fi
+    except ImportError:
+        import _frozen_importlib as _fi
+    _finder_registry[_fi.SourceFileLoader] = ResourceFinder
+    _finder_registry[_fi.FileFinder] = ResourceFinder
+    # See issue #146
+    _finder_registry[_fi.SourcelessFileLoader] = ResourceFinder
+    del _fi
+except (ImportError, AttributeError):
+    pass
+
+
+def register_finder(loader, finder_maker):
+    _finder_registry[type(loader)] = finder_maker
+
+
+_finder_cache = {}
+
+
+def finder(package):
+    """
+    Return a resource finder for a package.
+    :param package: The name of the package.
+    :return: A :class:`ResourceFinder` instance for the package.
+    """
+    if package in _finder_cache:
+        result = _finder_cache[package]
+    else:
+        if package not in sys.modules:
+            __import__(package)
+        module = sys.modules[package]
+        path = getattr(module, '__path__', None)
+        if path is None:
+            raise DistlibException('You cannot get a finder for a module, '
+                                   'only for a package')
+        loader = getattr(module, '__loader__', None)
+        finder_maker = _finder_registry.get(type(loader))
+        if finder_maker is None:
+            raise DistlibException('Unable to locate finder for %r' % package)
+        result = finder_maker(module)
+        _finder_cache[package] = result
+    return result
+
+
+_dummy_module = types.ModuleType(str('__dummy__'))
+
+
+def finder_for_path(path):
+    """
+    Return a resource finder for a path, which should represent a container.
+
+    :param path: The path.
+    :return: A :class:`ResourceFinder` instance for the path.
+    """
+    result = None
+    # calls any path hooks, gets importer into cache
+    pkgutil.get_importer(path)
+    loader = sys.path_importer_cache.get(path)
+    finder = _finder_registry.get(type(loader))
+    if finder:
+        module = _dummy_module
+        module.__file__ = os.path.join(path, '')
+        module.__loader__ = loader
+        result = finder(module)
+    return result
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/scripts.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/scripts.py
new file mode 100644
index 0000000..d270624
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/scripts.py
@@ -0,0 +1,437 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2015 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from io import BytesIO
+import logging
+import os
+import re
+import struct
+import sys
+import time
+from zipfile import ZipInfo
+
+from .compat import sysconfig, detect_encoding, ZipFile
+from .resources import finder
+from .util import (FileOperator, get_export_entry, convert_path,
+                   get_executable, get_platform, in_venv)
+
+logger = logging.getLogger(__name__)
+
+_DEFAULT_MANIFEST = '''
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+ <assemblyIdentity version="1.0.0.0"
+ processorArchitecture="X86"
+ name="%s"
+ type="win32"/>
+
+ <!-- Identify the application security requirements. -->
+ <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+ <security>
+ <requestedPrivileges>
+ <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+ </requestedPrivileges>
+ </security>
+ </trustInfo>
+</assembly>'''.strip()
+
+# check if Python is called on the first line with this expression
+FIRST_LINE_RE = re.compile(b'^#!.*pythonw?[0-9.]*([ \t].*)?$')
+SCRIPT_TEMPLATE = r'''# -*- coding: utf-8 -*-
+import re
+import sys
+from %(module)s import %(import_name)s
+if __name__ == '__main__':
+    sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
+    sys.exit(%(func)s())
+'''
+
+
+def enquote_executable(executable):
+    if ' ' in executable:
+        # make sure we quote only the executable in case of env
+        # for example /usr/bin/env "/dir with spaces/bin/jython"
+        # instead of "/usr/bin/env /dir with spaces/bin/jython"
+        # otherwise whole
+        if executable.startswith('/usr/bin/env '):
+            env, _executable = executable.split(' ', 1)
+            if ' ' in _executable and not _executable.startswith('"'):
+                executable = '%s "%s"' % (env, _executable)
+        else:
+            if not executable.startswith('"'):
+                executable = '"%s"' % executable
+    return executable
+
+# Keep the old name around (for now), as there is at least one project using it!
+_enquote_executable = enquote_executable
+
+class ScriptMaker(object):
+    """
+    A class to copy or create scripts from source scripts or callable
+    specifications.
+    """
+    script_template = SCRIPT_TEMPLATE
+
+    executable = None  # for shebangs
+
+    def __init__(self, source_dir, target_dir, add_launchers=True,
+                 dry_run=False, fileop=None):
+        self.source_dir = source_dir
+        self.target_dir = target_dir
+        self.add_launchers = add_launchers
+        self.force = False
+        self.clobber = False
+        # It only makes sense to set mode bits on POSIX.
+        self.set_mode = (os.name == 'posix') or (os.name == 'java' and
+                                                 os._name == 'posix')
+        self.variants = set(('', 'X.Y'))
+        self._fileop = fileop or FileOperator(dry_run)
+
+        self._is_nt = os.name == 'nt' or (
+            os.name == 'java' and os._name == 'nt')
+        self.version_info = sys.version_info
+
+    def _get_alternate_executable(self, executable, options):
+        if options.get('gui', False) and self._is_nt:  # pragma: no cover
+            dn, fn = os.path.split(executable)
+            fn = fn.replace('python', 'pythonw')
+            executable = os.path.join(dn, fn)
+        return executable
+
+    if sys.platform.startswith('java'):  # pragma: no cover
+        def _is_shell(self, executable):
+            """
+            Determine if the specified executable is a script
+            (contains a #! line)
+            """
+            try:
+                with open(executable) as fp:
+                    return fp.read(2) == '#!'
+            except (OSError, IOError):
+                logger.warning('Failed to open %s', executable)
+                return False
+
+        def _fix_jython_executable(self, executable):
+            if self._is_shell(executable):
+                # Workaround for Jython is not needed on Linux systems.
+                import java
+
+                if java.lang.System.getProperty('os.name') == 'Linux':
+                    return executable
+            elif executable.lower().endswith('jython.exe'):
+                # Use wrapper exe for Jython on Windows
+                return executable
+            return '/usr/bin/env %s' % executable
+
+    def _build_shebang(self, executable, post_interp):
+        """
+        Build a shebang line. In the simple case (on Windows, or a shebang line
+        which is not too long or contains spaces) use a simple formulation for
+        the shebang. Otherwise, use /bin/sh as the executable, with a contrived
+        shebang which allows the script to run either under Python or sh, using
+        suitable quoting. Thanks to Harald Nordgren for his input.
+
+        See also: http://www.in-ulm.de/~mascheck/various/shebang/#length
+                  https://hg.mozilla.org/mozilla-central/file/tip/mach
+        """
+        if os.name != 'posix':
+            simple_shebang = True
+        else:
+            # Add 3 for '#!' prefix and newline suffix.
+            shebang_length = len(executable) + len(post_interp) + 3
+            if sys.platform == 'darwin':
+                max_shebang_length = 512
+            else:
+                max_shebang_length = 127
+            simple_shebang = ((b' ' not in executable) and
+                              (shebang_length <= max_shebang_length))
+
+        if simple_shebang:
+            result = b'#!' + executable + post_interp + b'\n'
+        else:
+            result = b'#!/bin/sh\n'
+            result += b"'''exec' " + executable + post_interp + b' "$0" "$@"\n'
+            result += b"' '''"
+        return result
+
+    def _get_shebang(self, encoding, post_interp=b'', options=None):
+        enquote = True
+        if self.executable:
+            executable = self.executable
+            enquote = False     # assume this will be taken care of
+        elif not sysconfig.is_python_build():
+            executable = get_executable()
+        elif in_venv():  # pragma: no cover
+            executable = os.path.join(sysconfig.get_path('scripts'),
+                            'python%s' % sysconfig.get_config_var('EXE'))
+        else:  # pragma: no cover
+            executable = os.path.join(
+                sysconfig.get_config_var('BINDIR'),
+               'python%s%s' % (sysconfig.get_config_var('VERSION'),
+                               sysconfig.get_config_var('EXE')))
+            if not os.path.isfile(executable):
+                # for Python builds from source on Windows, no Python executables with
+                # a version suffix are created, so we use python.exe
+                executable = os.path.join(sysconfig.get_config_var('BINDIR'),
+                                'python%s' % (sysconfig.get_config_var('EXE')))
+        if options:
+            executable = self._get_alternate_executable(executable, options)
+
+        if sys.platform.startswith('java'):  # pragma: no cover
+            executable = self._fix_jython_executable(executable)
+
+        # Normalise case for Windows - COMMENTED OUT
+        # executable = os.path.normcase(executable)
+        # N.B. The normalising operation above has been commented out: See
+        # issue #124. Although paths in Windows are generally case-insensitive,
+        # they aren't always. For example, a path containing a ẞ (which is a
+        # LATIN CAPITAL LETTER SHARP S - U+1E9E) is normcased to ß (which is a
+        # LATIN SMALL LETTER SHARP S' - U+00DF). The two are not considered by
+        # Windows as equivalent in path names.
+
+        # If the user didn't specify an executable, it may be necessary to
+        # cater for executable paths with spaces (not uncommon on Windows)
+        if enquote:
+            executable = enquote_executable(executable)
+        # Issue #51: don't use fsencode, since we later try to
+        # check that the shebang is decodable using utf-8.
+        executable = executable.encode('utf-8')
+        # in case of IronPython, play safe and enable frames support
+        if (sys.platform == 'cli' and '-X:Frames' not in post_interp
+            and '-X:FullFrames' not in post_interp):  # pragma: no cover
+            post_interp += b' -X:Frames'
+        shebang = self._build_shebang(executable, post_interp)
+        # Python parser starts to read a script using UTF-8 until
+        # it gets a #coding:xxx cookie. The shebang has to be the
+        # first line of a file, the #coding:xxx cookie cannot be
+        # written before. So the shebang has to be decodable from
+        # UTF-8.
+        try:
+            shebang.decode('utf-8')
+        except UnicodeDecodeError:  # pragma: no cover
+            raise ValueError(
+                'The shebang (%r) is not decodable from utf-8' % shebang)
+        # If the script is encoded to a custom encoding (use a
+        # #coding:xxx cookie), the shebang has to be decodable from
+        # the script encoding too.
+        if encoding != 'utf-8':
+            try:
+                shebang.decode(encoding)
+            except UnicodeDecodeError:  # pragma: no cover
+                raise ValueError(
+                    'The shebang (%r) is not decodable '
+                    'from the script encoding (%r)' % (shebang, encoding))
+        return shebang
+
+    def _get_script_text(self, entry):
+        return self.script_template % dict(module=entry.prefix,
+                                           import_name=entry.suffix.split('.')[0],
+                                           func=entry.suffix)
+
+    manifest = _DEFAULT_MANIFEST
+
+    def get_manifest(self, exename):
+        base = os.path.basename(exename)
+        return self.manifest % base
+
+    def _write_script(self, names, shebang, script_bytes, filenames, ext):
+        use_launcher = self.add_launchers and self._is_nt
+        linesep = os.linesep.encode('utf-8')
+        if not shebang.endswith(linesep):
+            shebang += linesep
+        if not use_launcher:
+            script_bytes = shebang + script_bytes
+        else:  # pragma: no cover
+            if ext == 'py':
+                launcher = self._get_launcher('t')
+            else:
+                launcher = self._get_launcher('w')
+            stream = BytesIO()
+            with ZipFile(stream, 'w') as zf:
+                source_date_epoch = os.environ.get('SOURCE_DATE_EPOCH')
+                if source_date_epoch:
+                    date_time = time.gmtime(int(source_date_epoch))[:6]
+                    zinfo = ZipInfo(filename='__main__.py', date_time=date_time)
+                    zf.writestr(zinfo, script_bytes)
+                else:
+                    zf.writestr('__main__.py', script_bytes)
+            zip_data = stream.getvalue()
+            script_bytes = launcher + shebang + zip_data
+        for name in names:
+            outname = os.path.join(self.target_dir, name)
+            if use_launcher:  # pragma: no cover
+                n, e = os.path.splitext(outname)
+                if e.startswith('.py'):
+                    outname = n
+                outname = '%s.exe' % outname
+                try:
+                    self._fileop.write_binary_file(outname, script_bytes)
+                except Exception:
+                    # Failed writing an executable - it might be in use.
+                    logger.warning('Failed to write executable - trying to '
+                                   'use .deleteme logic')
+                    dfname = '%s.deleteme' % outname
+                    if os.path.exists(dfname):
+                        os.remove(dfname)       # Not allowed to fail here
+                    os.rename(outname, dfname)  # nor here
+                    self._fileop.write_binary_file(outname, script_bytes)
+                    logger.debug('Able to replace executable using '
+                                 '.deleteme logic')
+                    try:
+                        os.remove(dfname)
+                    except Exception:
+                        pass    # still in use - ignore error
+            else:
+                if self._is_nt and not outname.endswith('.' + ext):  # pragma: no cover
+                    outname = '%s.%s' % (outname, ext)
+                if os.path.exists(outname) and not self.clobber:
+                    logger.warning('Skipping existing file %s', outname)
+                    continue
+                self._fileop.write_binary_file(outname, script_bytes)
+                if self.set_mode:
+                    self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+
+    variant_separator = '-'
+
+    def get_script_filenames(self, name):
+        result = set()
+        if '' in self.variants:
+            result.add(name)
+        if 'X' in self.variants:
+            result.add('%s%s' % (name, self.version_info[0]))
+        if 'X.Y' in self.variants:
+            result.add('%s%s%s.%s' % (name, self.variant_separator,
+                                      self.version_info[0], self.version_info[1]))
+        return result
+
+    def _make_script(self, entry, filenames, options=None):
+        post_interp = b''
+        if options:
+            args = options.get('interpreter_args', [])
+            if args:
+                args = ' %s' % ' '.join(args)
+                post_interp = args.encode('utf-8')
+        shebang = self._get_shebang('utf-8', post_interp, options=options)
+        script = self._get_script_text(entry).encode('utf-8')
+        scriptnames = self.get_script_filenames(entry.name)
+        if options and options.get('gui', False):
+            ext = 'pyw'
+        else:
+            ext = 'py'
+        self._write_script(scriptnames, shebang, script, filenames, ext)
+
+    def _copy_script(self, script, filenames):
+        adjust = False
+        script = os.path.join(self.source_dir, convert_path(script))
+        outname = os.path.join(self.target_dir, os.path.basename(script))
+        if not self.force and not self._fileop.newer(script, outname):
+            logger.debug('not copying %s (up-to-date)', script)
+            return
+
+        # Always open the file, but ignore failures in dry-run mode --
+        # that way, we'll get accurate feedback if we can read the
+        # script.
+        try:
+            f = open(script, 'rb')
+        except IOError:  # pragma: no cover
+            if not self.dry_run:
+                raise
+            f = None
+        else:
+            first_line = f.readline()
+            if not first_line:  # pragma: no cover
+                logger.warning('%s is an empty file (skipping)', script)
+                return
+
+            match = FIRST_LINE_RE.match(first_line.replace(b'\r\n', b'\n'))
+            if match:
+                adjust = True
+                post_interp = match.group(1) or b''
+
+        if not adjust:
+            if f:
+                f.close()
+            self._fileop.copy_file(script, outname)
+            if self.set_mode:
+                self._fileop.set_executable_mode([outname])
+            filenames.append(outname)
+        else:
+            logger.info('copying and adjusting %s -> %s', script,
+                        self.target_dir)
+            if not self._fileop.dry_run:
+                encoding, lines = detect_encoding(f.readline)
+                f.seek(0)
+                shebang = self._get_shebang(encoding, post_interp)
+                if b'pythonw' in first_line:  # pragma: no cover
+                    ext = 'pyw'
+                else:
+                    ext = 'py'
+                n = os.path.basename(outname)
+                self._write_script([n], shebang, f.read(), filenames, ext)
+            if f:
+                f.close()
+
+    @property
+    def dry_run(self):
+        return self._fileop.dry_run
+
+    @dry_run.setter
+    def dry_run(self, value):
+        self._fileop.dry_run = value
+
+    if os.name == 'nt' or (os.name == 'java' and os._name == 'nt'):  # pragma: no cover
+        # Executable launcher support.
+        # Launchers are from https://bitbucket.org/vinay.sajip/simple_launcher/
+
+        def _get_launcher(self, kind):
+            if struct.calcsize('P') == 8:   # 64-bit
+                bits = '64'
+            else:
+                bits = '32'
+            platform_suffix = '-arm' if get_platform() == 'win-arm64' else ''
+            name = '%s%s%s.exe' % (kind, bits, platform_suffix)
+            # Issue 31: don't hardcode an absolute package name, but
+            # determine it relative to the current package
+            distlib_package = __name__.rsplit('.', 1)[0]
+            resource = finder(distlib_package).find(name)
+            if not resource:
+                msg = ('Unable to find resource %s in package %s' % (name,
+                       distlib_package))
+                raise ValueError(msg)
+            return resource.bytes
+
+    # Public API follows
+
+    def make(self, specification, options=None):
+        """
+        Make a script.
+
+        :param specification: The specification, which is either a valid export
+                              entry specification (to make a script from a
+                              callable) or a filename (to make a script by
+                              copying from a source location).
+        :param options: A dictionary of options controlling script generation.
+        :return: A list of all absolute pathnames written to.
+        """
+        filenames = []
+        entry = get_export_entry(specification)
+        if entry is None:
+            self._copy_script(specification, filenames)
+        else:
+            self._make_script(entry, filenames, options=options)
+        return filenames
+
+    def make_multiple(self, specifications, options=None):
+        """
+        Take a list of specifications and make scripts from them,
+        :param specifications: A list of specifications.
+        :return: A list of all absolute pathnames written to,
+        """
+        filenames = []
+        for specification in specifications:
+            filenames.extend(self.make(specification, options))
+        return filenames
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t32.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t32.exe
new file mode 100644
index 0000000..52154f0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t32.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64-arm.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64-arm.exe
new file mode 100644
index 0000000..e1ab8f8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64-arm.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64.exe
new file mode 100644
index 0000000..e8bebdb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/t64.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/util.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/util.py
new file mode 100644
index 0000000..dd01849
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/util.py
@@ -0,0 +1,1932 @@
+#
+# Copyright (C) 2012-2021 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+import codecs
+from collections import deque
+import contextlib
+import csv
+from glob import iglob as std_iglob
+import io
+import json
+import logging
+import os
+import py_compile
+import re
+import socket
+try:
+    import ssl
+except ImportError:  # pragma: no cover
+    ssl = None
+import subprocess
+import sys
+import tarfile
+import tempfile
+import textwrap
+
+try:
+    import threading
+except ImportError:  # pragma: no cover
+    import dummy_threading as threading
+import time
+
+from . import DistlibException
+from .compat import (string_types, text_type, shutil, raw_input, StringIO,
+                     cache_from_source, urlopen, urljoin, httplib, xmlrpclib,
+                     splittype, HTTPHandler, BaseConfigurator, valid_ident,
+                     Container, configparser, URLError, ZipFile, fsdecode,
+                     unquote, urlparse)
+
+logger = logging.getLogger(__name__)
+
+#
+# Requirement parsing code as per PEP 508
+#
+
+IDENTIFIER = re.compile(r'^([\w\.-]+)\s*')
+VERSION_IDENTIFIER = re.compile(r'^([\w\.*+-]+)\s*')
+COMPARE_OP = re.compile(r'^(<=?|>=?|={2,3}|[~!]=)\s*')
+MARKER_OP = re.compile(r'^((<=?)|(>=?)|={2,3}|[~!]=|in|not\s+in)\s*')
+OR = re.compile(r'^or\b\s*')
+AND = re.compile(r'^and\b\s*')
+NON_SPACE = re.compile(r'(\S+)\s*')
+STRING_CHUNK = re.compile(r'([\s\w\.{}()*+#:;,/?!~`@$%^&=|<>\[\]-]+)')
+
+
+def parse_marker(marker_string):
+    """
+    Parse a marker string and return a dictionary containing a marker expression.
+
+    The dictionary will contain keys "op", "lhs" and "rhs" for non-terminals in
+    the expression grammar, or strings. A string contained in quotes is to be
+    interpreted as a literal string, and a string not contained in quotes is a
+    variable (such as os_name).
+    """
+    def marker_var(remaining):
+        # either identifier, or literal string
+        m = IDENTIFIER.match(remaining)
+        if m:
+            result = m.groups()[0]
+            remaining = remaining[m.end():]
+        elif not remaining:
+            raise SyntaxError('unexpected end of input')
+        else:
+            q = remaining[0]
+            if q not in '\'"':
+                raise SyntaxError('invalid expression: %s' % remaining)
+            oq = '\'"'.replace(q, '')
+            remaining = remaining[1:]
+            parts = [q]
+            while remaining:
+                # either a string chunk, or oq, or q to terminate
+                if remaining[0] == q:
+                    break
+                elif remaining[0] == oq:
+                    parts.append(oq)
+                    remaining = remaining[1:]
+                else:
+                    m = STRING_CHUNK.match(remaining)
+                    if not m:
+                        raise SyntaxError('error in string literal: %s' % remaining)
+                    parts.append(m.groups()[0])
+                    remaining = remaining[m.end():]
+            else:
+                s = ''.join(parts)
+                raise SyntaxError('unterminated string: %s' % s)
+            parts.append(q)
+            result = ''.join(parts)
+            remaining = remaining[1:].lstrip() # skip past closing quote
+        return result, remaining
+
+    def marker_expr(remaining):
+        if remaining and remaining[0] == '(':
+            result, remaining = marker(remaining[1:].lstrip())
+            if remaining[0] != ')':
+                raise SyntaxError('unterminated parenthesis: %s' % remaining)
+            remaining = remaining[1:].lstrip()
+        else:
+            lhs, remaining = marker_var(remaining)
+            while remaining:
+                m = MARKER_OP.match(remaining)
+                if not m:
+                    break
+                op = m.groups()[0]
+                remaining = remaining[m.end():]
+                rhs, remaining = marker_var(remaining)
+                lhs = {'op': op, 'lhs': lhs, 'rhs': rhs}
+            result = lhs
+        return result, remaining
+
+    def marker_and(remaining):
+        lhs, remaining = marker_expr(remaining)
+        while remaining:
+            m = AND.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_expr(remaining)
+            lhs = {'op': 'and', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    def marker(remaining):
+        lhs, remaining = marker_and(remaining)
+        while remaining:
+            m = OR.match(remaining)
+            if not m:
+                break
+            remaining = remaining[m.end():]
+            rhs, remaining = marker_and(remaining)
+            lhs = {'op': 'or', 'lhs': lhs, 'rhs': rhs}
+        return lhs, remaining
+
+    return marker(marker_string)
+
+
+def parse_requirement(req):
+    """
+    Parse a requirement passed in as a string. Return a Container
+    whose attributes contain the various parts of the requirement.
+    """
+    remaining = req.strip()
+    if not remaining or remaining.startswith('#'):
+        return None
+    m = IDENTIFIER.match(remaining)
+    if not m:
+        raise SyntaxError('name expected: %s' % remaining)
+    distname = m.groups()[0]
+    remaining = remaining[m.end():]
+    extras = mark_expr = versions = uri = None
+    if remaining and remaining[0] == '[':
+        i = remaining.find(']', 1)
+        if i < 0:
+            raise SyntaxError('unterminated extra: %s' % remaining)
+        s = remaining[1:i]
+        remaining = remaining[i + 1:].lstrip()
+        extras = []
+        while s:
+            m = IDENTIFIER.match(s)
+            if not m:
+                raise SyntaxError('malformed extra: %s' % s)
+            extras.append(m.groups()[0])
+            s = s[m.end():]
+            if not s:
+                break
+            if s[0] != ',':
+                raise SyntaxError('comma expected in extras: %s' % s)
+            s = s[1:].lstrip()
+        if not extras:
+            extras = None
+    if remaining:
+        if remaining[0] == '@':
+            # it's a URI
+            remaining = remaining[1:].lstrip()
+            m = NON_SPACE.match(remaining)
+            if not m:
+                raise SyntaxError('invalid URI: %s' % remaining)
+            uri = m.groups()[0]
+            t = urlparse(uri)
+            # there are issues with Python and URL parsing, so this test
+            # is a bit crude. See bpo-20271, bpo-23505. Python doesn't
+            # always parse invalid URLs correctly - it should raise
+            # exceptions for malformed URLs
+            if not (t.scheme and t.netloc):
+                raise SyntaxError('Invalid URL: %s' % uri)
+            remaining = remaining[m.end():].lstrip()
+        else:
+
+            def get_versions(ver_remaining):
+                """
+                Return a list of operator, version tuples if any are
+                specified, else None.
+                """
+                m = COMPARE_OP.match(ver_remaining)
+                versions = None
+                if m:
+                    versions = []
+                    while True:
+                        op = m.groups()[0]
+                        ver_remaining = ver_remaining[m.end():]
+                        m = VERSION_IDENTIFIER.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid version: %s' % ver_remaining)
+                        v = m.groups()[0]
+                        versions.append((op, v))
+                        ver_remaining = ver_remaining[m.end():]
+                        if not ver_remaining or ver_remaining[0] != ',':
+                            break
+                        ver_remaining = ver_remaining[1:].lstrip()
+                        # Some packages have a trailing comma which would break things
+                        # See issue #148
+                        if not ver_remaining:
+                            break
+                        m = COMPARE_OP.match(ver_remaining)
+                        if not m:
+                            raise SyntaxError('invalid constraint: %s' % ver_remaining)
+                    if not versions:
+                        versions = None
+                return versions, ver_remaining
+
+            if remaining[0] != '(':
+                versions, remaining = get_versions(remaining)
+            else:
+                i = remaining.find(')', 1)
+                if i < 0:
+                    raise SyntaxError('unterminated parenthesis: %s' % remaining)
+                s = remaining[1:i]
+                remaining = remaining[i + 1:].lstrip()
+                # As a special diversion from PEP 508, allow a version number
+                # a.b.c in parentheses as a synonym for ~= a.b.c (because this
+                # is allowed in earlier PEPs)
+                if COMPARE_OP.match(s):
+                    versions, _ = get_versions(s)
+                else:
+                    m = VERSION_IDENTIFIER.match(s)
+                    if not m:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    v = m.groups()[0]
+                    s = s[m.end():].lstrip()
+                    if s:
+                        raise SyntaxError('invalid constraint: %s' % s)
+                    versions = [('~=', v)]
+
+    if remaining:
+        if remaining[0] != ';':
+            raise SyntaxError('invalid requirement: %s' % remaining)
+        remaining = remaining[1:].lstrip()
+
+        mark_expr, remaining = parse_marker(remaining)
+
+    if remaining and remaining[0] != '#':
+        raise SyntaxError('unexpected trailing data: %s' % remaining)
+
+    if not versions:
+        rs = distname
+    else:
+        rs = '%s %s' % (distname, ', '.join(['%s %s' % con for con in versions]))
+    return Container(name=distname, extras=extras, constraints=versions,
+                     marker=mark_expr, url=uri, requirement=rs)
+
+
+def get_resources_dests(resources_root, rules):
+    """Find destinations for resources files"""
+
+    def get_rel_path(root, path):
+        # normalizes and returns a lstripped-/-separated path
+        root = root.replace(os.path.sep, '/')
+        path = path.replace(os.path.sep, '/')
+        assert path.startswith(root)
+        return path[len(root):].lstrip('/')
+
+    destinations = {}
+    for base, suffix, dest in rules:
+        prefix = os.path.join(resources_root, base)
+        for abs_base in iglob(prefix):
+            abs_glob = os.path.join(abs_base, suffix)
+            for abs_path in iglob(abs_glob):
+                resource_file = get_rel_path(resources_root, abs_path)
+                if dest is None:  # remove the entry if it was here
+                    destinations.pop(resource_file, None)
+                else:
+                    rel_path = get_rel_path(abs_base, abs_path)
+                    rel_dest = dest.replace(os.path.sep, '/').rstrip('/')
+                    destinations[resource_file] = rel_dest + '/' + rel_path
+    return destinations
+
+
+def in_venv():
+    if hasattr(sys, 'real_prefix'):
+        # virtualenv venvs
+        result = True
+    else:
+        # PEP 405 venvs
+        result = sys.prefix != getattr(sys, 'base_prefix', sys.prefix)
+    return result
+
+
+def get_executable():
+# The __PYVENV_LAUNCHER__ dance is apparently no longer needed, as
+# changes to the stub launcher mean that sys.executable always points
+# to the stub on OS X
+#    if sys.platform == 'darwin' and ('__PYVENV_LAUNCHER__'
+#                                     in os.environ):
+#        result =  os.environ['__PYVENV_LAUNCHER__']
+#    else:
+#        result = sys.executable
+#    return result
+    # Avoid normcasing: see issue #143
+    # result = os.path.normcase(sys.executable)
+    result = sys.executable
+    if not isinstance(result, text_type):
+        result = fsdecode(result)
+    return result
+
+
+def proceed(prompt, allowed_chars, error_prompt=None, default=None):
+    p = prompt
+    while True:
+        s = raw_input(p)
+        p = prompt
+        if not s and default:
+            s = default
+        if s:
+            c = s[0].lower()
+            if c in allowed_chars:
+                break
+            if error_prompt:
+                p = '%c: %s\n%s' % (c, error_prompt, prompt)
+    return c
+
+
+def extract_by_key(d, keys):
+    if isinstance(keys, string_types):
+        keys = keys.split()
+    result = {}
+    for key in keys:
+        if key in d:
+            result[key] = d[key]
+    return result
+
+def read_exports(stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getreader('utf-8')(stream)
+    # Try to load as JSON, falling back on legacy format
+    data = stream.read()
+    stream = StringIO(data)
+    try:
+        jdata = json.load(stream)
+        result = jdata['extensions']['python.exports']['exports']
+        for group, entries in result.items():
+            for k, v in entries.items():
+                s = '%s = %s' % (k, v)
+                entry = get_export_entry(s)
+                assert entry is not None
+                entries[k] = entry
+        return result
+    except Exception:
+        stream.seek(0, 0)
+
+    def read_stream(cp, stream):
+        if hasattr(cp, 'read_file'):
+            cp.read_file(stream)
+        else:
+            cp.readfp(stream)
+
+    cp = configparser.ConfigParser()
+    try:
+        read_stream(cp, stream)
+    except configparser.MissingSectionHeaderError:
+        stream.close()
+        data = textwrap.dedent(data)
+        stream = StringIO(data)
+        read_stream(cp, stream)
+
+    result = {}
+    for key in cp.sections():
+        result[key] = entries = {}
+        for name, value in cp.items(key):
+            s = '%s = %s' % (name, value)
+            entry = get_export_entry(s)
+            assert entry is not None
+            #entry.dist = self
+            entries[name] = entry
+    return result
+
+
+def write_exports(exports, stream):
+    if sys.version_info[0] >= 3:
+        # needs to be a text stream
+        stream = codecs.getwriter('utf-8')(stream)
+    cp = configparser.ConfigParser()
+    for k, v in exports.items():
+        # TODO check k, v for valid values
+        cp.add_section(k)
+        for entry in v.values():
+            if entry.suffix is None:
+                s = entry.prefix
+            else:
+                s = '%s:%s' % (entry.prefix, entry.suffix)
+            if entry.flags:
+                s = '%s [%s]' % (s, ', '.join(entry.flags))
+            cp.set(k, entry.name, s)
+    cp.write(stream)
+
+
+@contextlib.contextmanager
+def tempdir():
+    td = tempfile.mkdtemp()
+    try:
+        yield td
+    finally:
+        shutil.rmtree(td)
+
+@contextlib.contextmanager
+def chdir(d):
+    cwd = os.getcwd()
+    try:
+        os.chdir(d)
+        yield
+    finally:
+        os.chdir(cwd)
+
+
+@contextlib.contextmanager
+def socket_timeout(seconds=15):
+    cto = socket.getdefaulttimeout()
+    try:
+        socket.setdefaulttimeout(seconds)
+        yield
+    finally:
+        socket.setdefaulttimeout(cto)
+
+
+class cached_property(object):
+    def __init__(self, func):
+        self.func = func
+        #for attr in ('__name__', '__module__', '__doc__'):
+        #    setattr(self, attr, getattr(func, attr, None))
+
+    def __get__(self, obj, cls=None):
+        if obj is None:
+            return self
+        value = self.func(obj)
+        object.__setattr__(obj, self.func.__name__, value)
+        #obj.__dict__[self.func.__name__] = value = self.func(obj)
+        return value
+
+def convert_path(pathname):
+    """Return 'pathname' as a name that will work on the native filesystem.
+
+    The path is split on '/' and put back together again using the current
+    directory separator.  Needed because filenames in the setup script are
+    always supplied in Unix style, and have to be converted to the local
+    convention before we can actually use them in the filesystem.  Raises
+    ValueError on non-Unix-ish systems if 'pathname' either starts or
+    ends with a slash.
+    """
+    if os.sep == '/':
+        return pathname
+    if not pathname:
+        return pathname
+    if pathname[0] == '/':
+        raise ValueError("path '%s' cannot be absolute" % pathname)
+    if pathname[-1] == '/':
+        raise ValueError("path '%s' cannot end with '/'" % pathname)
+
+    paths = pathname.split('/')
+    while os.curdir in paths:
+        paths.remove(os.curdir)
+    if not paths:
+        return os.curdir
+    return os.path.join(*paths)
+
+
+class FileOperator(object):
+    def __init__(self, dry_run=False):
+        self.dry_run = dry_run
+        self.ensured = set()
+        self._init_record()
+
+    def _init_record(self):
+        self.record = False
+        self.files_written = set()
+        self.dirs_created = set()
+
+    def record_as_written(self, path):
+        if self.record:
+            self.files_written.add(path)
+
+    def newer(self, source, target):
+        """Tell if the target is newer than the source.
+
+        Returns true if 'source' exists and is more recently modified than
+        'target', or if 'source' exists and 'target' doesn't.
+
+        Returns false if both exist and 'target' is the same age or younger
+        than 'source'. Raise PackagingFileError if 'source' does not exist.
+
+        Note that this test is not very accurate: files created in the same
+        second will have the same "age".
+        """
+        if not os.path.exists(source):
+            raise DistlibException("file '%r' does not exist" %
+                                   os.path.abspath(source))
+        if not os.path.exists(target):
+            return True
+
+        return os.stat(source).st_mtime > os.stat(target).st_mtime
+
+    def copy_file(self, infile, outfile, check=True):
+        """Copy a file respecting dry-run and force flags.
+        """
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying %s to %s', infile, outfile)
+        if not self.dry_run:
+            msg = None
+            if check:
+                if os.path.islink(outfile):
+                    msg = '%s is a symlink' % outfile
+                elif os.path.exists(outfile) and not os.path.isfile(outfile):
+                    msg = '%s is a non-regular file' % outfile
+            if msg:
+                raise ValueError(msg + ' which would be overwritten')
+            shutil.copyfile(infile, outfile)
+        self.record_as_written(outfile)
+
+    def copy_stream(self, instream, outfile, encoding=None):
+        assert not os.path.isdir(outfile)
+        self.ensure_dir(os.path.dirname(outfile))
+        logger.info('Copying stream %s to %s', instream, outfile)
+        if not self.dry_run:
+            if encoding is None:
+                outstream = open(outfile, 'wb')
+            else:
+                outstream = codecs.open(outfile, 'w', encoding=encoding)
+            try:
+                shutil.copyfileobj(instream, outstream)
+            finally:
+                outstream.close()
+        self.record_as_written(outfile)
+
+    def write_binary_file(self, path, data):
+        self.ensure_dir(os.path.dirname(path))
+        if not self.dry_run:
+            if os.path.exists(path):
+                os.remove(path)
+            with open(path, 'wb') as f:
+                f.write(data)
+        self.record_as_written(path)
+
+    def write_text_file(self, path, data, encoding):
+        self.write_binary_file(path, data.encode(encoding))
+
+    def set_mode(self, bits, mask, files):
+        if os.name == 'posix' or (os.name == 'java' and os._name == 'posix'):
+            # Set the executable bits (owner, group, and world) on
+            # all the files specified.
+            for f in files:
+                if self.dry_run:
+                    logger.info("changing mode of %s", f)
+                else:
+                    mode = (os.stat(f).st_mode | bits) & mask
+                    logger.info("changing mode of %s to %o", f, mode)
+                    os.chmod(f, mode)
+
+    set_executable_mode = lambda s, f: s.set_mode(0o555, 0o7777, f)
+
+    def ensure_dir(self, path):
+        path = os.path.abspath(path)
+        if path not in self.ensured and not os.path.exists(path):
+            self.ensured.add(path)
+            d, f = os.path.split(path)
+            self.ensure_dir(d)
+            logger.info('Creating %s' % path)
+            if not self.dry_run:
+                os.mkdir(path)
+            if self.record:
+                self.dirs_created.add(path)
+
+    def byte_compile(self, path, optimize=False, force=False, prefix=None, hashed_invalidation=False):
+        dpath = cache_from_source(path, not optimize)
+        logger.info('Byte-compiling %s to %s', path, dpath)
+        if not self.dry_run:
+            if force or self.newer(path, dpath):
+                if not prefix:
+                    diagpath = None
+                else:
+                    assert path.startswith(prefix)
+                    diagpath = path[len(prefix):]
+            compile_kwargs = {}
+            if hashed_invalidation and hasattr(py_compile, 'PycInvalidationMode'):
+                compile_kwargs['invalidation_mode'] = py_compile.PycInvalidationMode.CHECKED_HASH
+            py_compile.compile(path, dpath, diagpath, True, **compile_kwargs)     # raise error
+        self.record_as_written(dpath)
+        return dpath
+
+    def ensure_removed(self, path):
+        if os.path.exists(path):
+            if os.path.isdir(path) and not os.path.islink(path):
+                logger.debug('Removing directory tree at %s', path)
+                if not self.dry_run:
+                    shutil.rmtree(path)
+                if self.record:
+                    if path in self.dirs_created:
+                        self.dirs_created.remove(path)
+            else:
+                if os.path.islink(path):
+                    s = 'link'
+                else:
+                    s = 'file'
+                logger.debug('Removing %s %s', s, path)
+                if not self.dry_run:
+                    os.remove(path)
+                if self.record:
+                    if path in self.files_written:
+                        self.files_written.remove(path)
+
+    def is_writable(self, path):
+        result = False
+        while not result:
+            if os.path.exists(path):
+                result = os.access(path, os.W_OK)
+                break
+            parent = os.path.dirname(path)
+            if parent == path:
+                break
+            path = parent
+        return result
+
+    def commit(self):
+        """
+        Commit recorded changes, turn off recording, return
+        changes.
+        """
+        assert self.record
+        result = self.files_written, self.dirs_created
+        self._init_record()
+        return result
+
+    def rollback(self):
+        if not self.dry_run:
+            for f in list(self.files_written):
+                if os.path.exists(f):
+                    os.remove(f)
+            # dirs should all be empty now, except perhaps for
+            # __pycache__ subdirs
+            # reverse so that subdirs appear before their parents
+            dirs = sorted(self.dirs_created, reverse=True)
+            for d in dirs:
+                flist = os.listdir(d)
+                if flist:
+                    assert flist == ['__pycache__']
+                    sd = os.path.join(d, flist[0])
+                    os.rmdir(sd)
+                os.rmdir(d)     # should fail if non-empty
+        self._init_record()
+
+def resolve(module_name, dotted_path):
+    if module_name in sys.modules:
+        mod = sys.modules[module_name]
+    else:
+        mod = __import__(module_name)
+    if dotted_path is None:
+        result = mod
+    else:
+        parts = dotted_path.split('.')
+        result = getattr(mod, parts.pop(0))
+        for p in parts:
+            result = getattr(result, p)
+    return result
+
+
+class ExportEntry(object):
+    def __init__(self, name, prefix, suffix, flags):
+        self.name = name
+        self.prefix = prefix
+        self.suffix = suffix
+        self.flags = flags
+
+    @cached_property
+    def value(self):
+        return resolve(self.prefix, self.suffix)
+
+    def __repr__(self):  # pragma: no cover
+        return '<ExportEntry %s = %s:%s %s>' % (self.name, self.prefix,
+                                                self.suffix, self.flags)
+
+    def __eq__(self, other):
+        if not isinstance(other, ExportEntry):
+            result = False
+        else:
+            result = (self.name == other.name and
+                      self.prefix == other.prefix and
+                      self.suffix == other.suffix and
+                      self.flags == other.flags)
+        return result
+
+    __hash__ = object.__hash__
+
+
+ENTRY_RE = re.compile(r'''(?P<name>(\w|[-.+])+)
+                      \s*=\s*(?P<callable>(\w+)([:\.]\w+)*)
+                      \s*(\[\s*(?P<flags>[\w-]+(=\w+)?(,\s*\w+(=\w+)?)*)\s*\])?
+                      ''', re.VERBOSE)
+
+def get_export_entry(specification):
+    m = ENTRY_RE.search(specification)
+    if not m:
+        result = None
+        if '[' in specification or ']' in specification:
+            raise DistlibException("Invalid specification "
+                                   "'%s'" % specification)
+    else:
+        d = m.groupdict()
+        name = d['name']
+        path = d['callable']
+        colons = path.count(':')
+        if colons == 0:
+            prefix, suffix = path, None
+        else:
+            if colons != 1:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            prefix, suffix = path.split(':')
+        flags = d['flags']
+        if flags is None:
+            if '[' in specification or ']' in specification:
+                raise DistlibException("Invalid specification "
+                                       "'%s'" % specification)
+            flags = []
+        else:
+            flags = [f.strip() for f in flags.split(',')]
+        result = ExportEntry(name, prefix, suffix, flags)
+    return result
+
+
+def get_cache_base(suffix=None):
+    """
+    Return the default base location for distlib caches. If the directory does
+    not exist, it is created. Use the suffix provided for the base directory,
+    and default to '.distlib' if it isn't provided.
+
+    On Windows, if LOCALAPPDATA is defined in the environment, then it is
+    assumed to be a directory, and will be the parent directory of the result.
+    On POSIX, and on Windows if LOCALAPPDATA is not defined, the user's home
+    directory - using os.expanduser('~') - will be the parent directory of
+    the result.
+
+    The result is just the directory '.distlib' in the parent directory as
+    determined above, or with the name specified with ``suffix``.
+    """
+    if suffix is None:
+        suffix = '.distlib'
+    if os.name == 'nt' and 'LOCALAPPDATA' in os.environ:
+        result = os.path.expandvars('$localappdata')
+    else:
+        # Assume posix, or old Windows
+        result = os.path.expanduser('~')
+    # we use 'isdir' instead of 'exists', because we want to
+    # fail if there's a file with that name
+    if os.path.isdir(result):
+        usable = os.access(result, os.W_OK)
+        if not usable:
+            logger.warning('Directory exists but is not writable: %s', result)
+    else:
+        try:
+            os.makedirs(result)
+            usable = True
+        except OSError:
+            logger.warning('Unable to create %s', result, exc_info=True)
+            usable = False
+    if not usable:
+        result = tempfile.mkdtemp()
+        logger.warning('Default location unusable, using %s', result)
+    return os.path.join(result, suffix)
+
+
+def path_to_cache_dir(path):
+    """
+    Convert an absolute path to a directory name for use in a cache.
+
+    The algorithm used is:
+
+    #. On Windows, any ``':'`` in the drive is replaced with ``'---'``.
+    #. Any occurrence of ``os.sep`` is replaced with ``'--'``.
+    #. ``'.cache'`` is appended.
+    """
+    d, p = os.path.splitdrive(os.path.abspath(path))
+    if d:
+        d = d.replace(':', '---')
+    p = p.replace(os.sep, '--')
+    return d + p + '.cache'
+
+
+def ensure_slash(s):
+    if not s.endswith('/'):
+        return s + '/'
+    return s
+
+
+def parse_credentials(netloc):
+    username = password = None
+    if '@' in netloc:
+        prefix, netloc = netloc.rsplit('@', 1)
+        if ':' not in prefix:
+            username = prefix
+        else:
+            username, password = prefix.split(':', 1)
+    if username:
+        username = unquote(username)
+    if password:
+        password = unquote(password)
+    return username, password, netloc
+
+
+def get_process_umask():
+    result = os.umask(0o22)
+    os.umask(result)
+    return result
+
+def is_string_sequence(seq):
+    result = True
+    i = None
+    for i, s in enumerate(seq):
+        if not isinstance(s, string_types):
+            result = False
+            break
+    assert i is not None
+    return result
+
+PROJECT_NAME_AND_VERSION = re.compile('([a-z0-9_]+([.-][a-z_][a-z0-9_]*)*)-'
+                                      '([a-z0-9_.+-]+)', re.I)
+PYTHON_VERSION = re.compile(r'-py(\d\.?\d?)')
+
+
+def split_filename(filename, project_name=None):
+    """
+    Extract name, version, python version from a filename (no extension)
+
+    Return name, version, pyver or None
+    """
+    result = None
+    pyver = None
+    filename = unquote(filename).replace(' ', '-')
+    m = PYTHON_VERSION.search(filename)
+    if m:
+        pyver = m.group(1)
+        filename = filename[:m.start()]
+    if project_name and len(filename) > len(project_name) + 1:
+        m = re.match(re.escape(project_name) + r'\b', filename)
+        if m:
+            n = m.end()
+            result = filename[:n], filename[n + 1:], pyver
+    if result is None:
+        m = PROJECT_NAME_AND_VERSION.match(filename)
+        if m:
+            result = m.group(1), m.group(3), pyver
+    return result
+
+# Allow spaces in name because of legacy dists like "Twisted Core"
+NAME_VERSION_RE = re.compile(r'(?P<name>[\w .-]+)\s*'
+                             r'\(\s*(?P<ver>[^\s)]+)\)$')
+
+def parse_name_and_version(p):
+    """
+    A utility method used to get name and version from a string.
+
+    From e.g. a Provides-Dist value.
+
+    :param p: A value in a form 'foo (1.0)'
+    :return: The name and version as a tuple.
+    """
+    m = NAME_VERSION_RE.match(p)
+    if not m:
+        raise DistlibException('Ill-formed name/version string: \'%s\'' % p)
+    d = m.groupdict()
+    return d['name'].strip().lower(), d['ver']
+
+def get_extras(requested, available):
+    result = set()
+    requested = set(requested or [])
+    available = set(available or [])
+    if '*' in requested:
+        requested.remove('*')
+        result |= available
+    for r in requested:
+        if r == '-':
+            result.add(r)
+        elif r.startswith('-'):
+            unwanted = r[1:]
+            if unwanted not in available:
+                logger.warning('undeclared extra: %s' % unwanted)
+            if unwanted in result:
+                result.remove(unwanted)
+        else:
+            if r not in available:
+                logger.warning('undeclared extra: %s' % r)
+            result.add(r)
+    return result
+#
+# Extended metadata functionality
+#
+
+def _get_external_data(url):
+    result = {}
+    try:
+        # urlopen might fail if it runs into redirections,
+        # because of Python issue #13696. Fixed in locators
+        # using a custom redirect handler.
+        resp = urlopen(url)
+        headers = resp.info()
+        ct = headers.get('Content-Type')
+        if not ct.startswith('application/json'):
+            logger.debug('Unexpected response for JSON request: %s', ct)
+        else:
+            reader = codecs.getreader('utf-8')(resp)
+            #data = reader.read().decode('utf-8')
+            #result = json.loads(data)
+            result = json.load(reader)
+    except Exception as e:
+        logger.exception('Failed to get external data for %s: %s', url, e)
+    return result
+
+_external_data_base_url = 'https://www.red-dove.com/pypi/projects/'
+
+def get_project_data(name):
+    url = '%s/%s/project.json' % (name[0].upper(), name)
+    url = urljoin(_external_data_base_url, url)
+    result = _get_external_data(url)
+    return result
+
+def get_package_data(name, version):
+    url = '%s/%s/package-%s.json' % (name[0].upper(), name, version)
+    url = urljoin(_external_data_base_url, url)
+    return _get_external_data(url)
+
+
+class Cache(object):
+    """
+    A class implementing a cache for resources that need to live in the file system
+    e.g. shared libraries. This class was moved from resources to here because it
+    could be used by other modules, e.g. the wheel module.
+    """
+
+    def __init__(self, base):
+        """
+        Initialise an instance.
+
+        :param base: The base directory where the cache should be located.
+        """
+        # we use 'isdir' instead of 'exists', because we want to
+        # fail if there's a file with that name
+        if not os.path.isdir(base):  # pragma: no cover
+            os.makedirs(base)
+        if (os.stat(base).st_mode & 0o77) != 0:
+            logger.warning('Directory \'%s\' is not private', base)
+        self.base = os.path.abspath(os.path.normpath(base))
+
+    def prefix_to_dir(self, prefix):
+        """
+        Converts a resource prefix to a directory name in the cache.
+        """
+        return path_to_cache_dir(prefix)
+
+    def clear(self):
+        """
+        Clear the cache.
+        """
+        not_removed = []
+        for fn in os.listdir(self.base):
+            fn = os.path.join(self.base, fn)
+            try:
+                if os.path.islink(fn) or os.path.isfile(fn):
+                    os.remove(fn)
+                elif os.path.isdir(fn):
+                    shutil.rmtree(fn)
+            except Exception:
+                not_removed.append(fn)
+        return not_removed
+
+
+class EventMixin(object):
+    """
+    A very simple publish/subscribe system.
+    """
+    def __init__(self):
+        self._subscribers = {}
+
+    def add(self, event, subscriber, append=True):
+        """
+        Add a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be added (and called when the
+                           event is published).
+        :param append: Whether to append or prepend the subscriber to an
+                       existing subscriber list for the event.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            subs[event] = deque([subscriber])
+        else:
+            sq = subs[event]
+            if append:
+                sq.append(subscriber)
+            else:
+                sq.appendleft(subscriber)
+
+    def remove(self, event, subscriber):
+        """
+        Remove a subscriber for an event.
+
+        :param event: The name of an event.
+        :param subscriber: The subscriber to be removed.
+        """
+        subs = self._subscribers
+        if event not in subs:
+            raise ValueError('No subscribers: %r' % event)
+        subs[event].remove(subscriber)
+
+    def get_subscribers(self, event):
+        """
+        Return an iterator for the subscribers for an event.
+        :param event: The event to return subscribers for.
+        """
+        return iter(self._subscribers.get(event, ()))
+
+    def publish(self, event, *args, **kwargs):
+        """
+        Publish a event and return a list of values returned by its
+        subscribers.
+
+        :param event: The event to publish.
+        :param args: The positional arguments to pass to the event's
+                     subscribers.
+        :param kwargs: The keyword arguments to pass to the event's
+                       subscribers.
+        """
+        result = []
+        for subscriber in self.get_subscribers(event):
+            try:
+                value = subscriber(event, *args, **kwargs)
+            except Exception:
+                logger.exception('Exception during event publication')
+                value = None
+            result.append(value)
+        logger.debug('publish %s: args = %s, kwargs = %s, result = %s',
+                     event, args, kwargs, result)
+        return result
+
+#
+# Simple sequencing
+#
+class Sequencer(object):
+    def __init__(self):
+        self._preds = {}
+        self._succs = {}
+        self._nodes = set()     # nodes with no preds/succs
+
+    def add_node(self, node):
+        self._nodes.add(node)
+
+    def remove_node(self, node, edges=False):
+        if node in self._nodes:
+            self._nodes.remove(node)
+        if edges:
+            for p in set(self._preds.get(node, ())):
+                self.remove(p, node)
+            for s in set(self._succs.get(node, ())):
+                self.remove(node, s)
+            # Remove empties
+            for k, v in list(self._preds.items()):
+                if not v:
+                    del self._preds[k]
+            for k, v in list(self._succs.items()):
+                if not v:
+                    del self._succs[k]
+
+    def add(self, pred, succ):
+        assert pred != succ
+        self._preds.setdefault(succ, set()).add(pred)
+        self._succs.setdefault(pred, set()).add(succ)
+
+    def remove(self, pred, succ):
+        assert pred != succ
+        try:
+            preds = self._preds[succ]
+            succs = self._succs[pred]
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of anything' % succ)
+        try:
+            preds.remove(pred)
+            succs.remove(succ)
+        except KeyError:  # pragma: no cover
+            raise ValueError('%r not a successor of %r' % (succ, pred))
+
+    def is_step(self, step):
+        return (step in self._preds or step in self._succs or
+                step in self._nodes)
+
+    def get_steps(self, final):
+        if not self.is_step(final):
+            raise ValueError('Unknown: %r' % final)
+        result = []
+        todo = []
+        seen = set()
+        todo.append(final)
+        while todo:
+            step = todo.pop(0)
+            if step in seen:
+                # if a step was already seen,
+                # move it to the end (so it will appear earlier
+                # when reversed on return) ... but not for the
+                # final step, as that would be confusing for
+                # users
+                if step != final:
+                    result.remove(step)
+                    result.append(step)
+            else:
+                seen.add(step)
+                result.append(step)
+                preds = self._preds.get(step, ())
+                todo.extend(preds)
+        return reversed(result)
+
+    @property
+    def strong_connections(self):
+        #http://en.wikipedia.org/wiki/Tarjan%27s_strongly_connected_components_algorithm
+        index_counter = [0]
+        stack = []
+        lowlinks = {}
+        index = {}
+        result = []
+
+        graph = self._succs
+
+        def strongconnect(node):
+            # set the depth index for this node to the smallest unused index
+            index[node] = index_counter[0]
+            lowlinks[node] = index_counter[0]
+            index_counter[0] += 1
+            stack.append(node)
+
+            # Consider successors
+            try:
+                successors = graph[node]
+            except Exception:
+                successors = []
+            for successor in successors:
+                if successor not in lowlinks:
+                    # Successor has not yet been visited
+                    strongconnect(successor)
+                    lowlinks[node] = min(lowlinks[node],lowlinks[successor])
+                elif successor in stack:
+                    # the successor is in the stack and hence in the current
+                    # strongly connected component (SCC)
+                    lowlinks[node] = min(lowlinks[node],index[successor])
+
+            # If `node` is a root node, pop the stack and generate an SCC
+            if lowlinks[node] == index[node]:
+                connected_component = []
+
+                while True:
+                    successor = stack.pop()
+                    connected_component.append(successor)
+                    if successor == node: break
+                component = tuple(connected_component)
+                # storing the result
+                result.append(component)
+
+        for node in graph:
+            if node not in lowlinks:
+                strongconnect(node)
+
+        return result
+
+    @property
+    def dot(self):
+        result = ['digraph G {']
+        for succ in self._preds:
+            preds = self._preds[succ]
+            for pred in preds:
+                result.append('  %s -> %s;' % (pred, succ))
+        for node in self._nodes:
+            result.append('  %s;' % node)
+        result.append('}')
+        return '\n'.join(result)
+
+#
+# Unarchiving functionality for zip, tar, tgz, tbz, whl
+#
+
+ARCHIVE_EXTENSIONS = ('.tar.gz', '.tar.bz2', '.tar', '.zip',
+                      '.tgz', '.tbz', '.whl')
+
+def unarchive(archive_filename, dest_dir, format=None, check=True):
+
+    def check_path(path):
+        if not isinstance(path, text_type):
+            path = path.decode('utf-8')
+        p = os.path.abspath(os.path.join(dest_dir, path))
+        if not p.startswith(dest_dir) or p[plen] != os.sep:
+            raise ValueError('path outside destination: %r' % p)
+
+    dest_dir = os.path.abspath(dest_dir)
+    plen = len(dest_dir)
+    archive = None
+    if format is None:
+        if archive_filename.endswith(('.zip', '.whl')):
+            format = 'zip'
+        elif archive_filename.endswith(('.tar.gz', '.tgz')):
+            format = 'tgz'
+            mode = 'r:gz'
+        elif archive_filename.endswith(('.tar.bz2', '.tbz')):
+            format = 'tbz'
+            mode = 'r:bz2'
+        elif archive_filename.endswith('.tar'):
+            format = 'tar'
+            mode = 'r'
+        else:  # pragma: no cover
+            raise ValueError('Unknown format for %r' % archive_filename)
+    try:
+        if format == 'zip':
+            archive = ZipFile(archive_filename, 'r')
+            if check:
+                names = archive.namelist()
+                for name in names:
+                    check_path(name)
+        else:
+            archive = tarfile.open(archive_filename, mode)
+            if check:
+                names = archive.getnames()
+                for name in names:
+                    check_path(name)
+        if format != 'zip' and sys.version_info[0] < 3:
+            # See Python issue 17153. If the dest path contains Unicode,
+            # tarfile extraction fails on Python 2.x if a member path name
+            # contains non-ASCII characters - it leads to an implicit
+            # bytes -> unicode conversion using ASCII to decode.
+            for tarinfo in archive.getmembers():
+                if not isinstance(tarinfo.name, text_type):
+                    tarinfo.name = tarinfo.name.decode('utf-8')
+        archive.extractall(dest_dir)
+
+    finally:
+        if archive:
+            archive.close()
+
+
+def zip_dir(directory):
+    """zip a directory tree into a BytesIO object"""
+    result = io.BytesIO()
+    dlen = len(directory)
+    with ZipFile(result, "w") as zf:
+        for root, dirs, files in os.walk(directory):
+            for name in files:
+                full = os.path.join(root, name)
+                rel = root[dlen:]
+                dest = os.path.join(rel, name)
+                zf.write(full, dest)
+    return result
+
+#
+# Simple progress bar
+#
+
+UNITS = ('', 'K', 'M', 'G','T','P')
+
+
+class Progress(object):
+    unknown = 'UNKNOWN'
+
+    def __init__(self, minval=0, maxval=100):
+        assert maxval is None or maxval >= minval
+        self.min = self.cur = minval
+        self.max = maxval
+        self.started = None
+        self.elapsed = 0
+        self.done = False
+
+    def update(self, curval):
+        assert self.min <= curval
+        assert self.max is None or curval <= self.max
+        self.cur = curval
+        now = time.time()
+        if self.started is None:
+            self.started = now
+        else:
+            self.elapsed = now - self.started
+
+    def increment(self, incr):
+        assert incr >= 0
+        self.update(self.cur + incr)
+
+    def start(self):
+        self.update(self.min)
+        return self
+
+    def stop(self):
+        if self.max is not None:
+            self.update(self.max)
+        self.done = True
+
+    @property
+    def maximum(self):
+        return self.unknown if self.max is None else self.max
+
+    @property
+    def percentage(self):
+        if self.done:
+            result = '100 %'
+        elif self.max is None:
+            result = ' ?? %'
+        else:
+            v = 100.0 * (self.cur - self.min) / (self.max - self.min)
+            result = '%3d %%' % v
+        return result
+
+    def format_duration(self, duration):
+        if (duration <= 0) and self.max is None or self.cur == self.min:
+            result = '??:??:??'
+        #elif duration < 1:
+        #    result = '--:--:--'
+        else:
+            result = time.strftime('%H:%M:%S', time.gmtime(duration))
+        return result
+
+    @property
+    def ETA(self):
+        if self.done:
+            prefix = 'Done'
+            t = self.elapsed
+            #import pdb; pdb.set_trace()
+        else:
+            prefix = 'ETA '
+            if self.max is None:
+                t = -1
+            elif self.elapsed == 0 or (self.cur == self.min):
+                t = 0
+            else:
+                #import pdb; pdb.set_trace()
+                t = float(self.max - self.min)
+                t /= self.cur - self.min
+                t = (t - 1) * self.elapsed
+        return '%s: %s' % (prefix, self.format_duration(t))
+
+    @property
+    def speed(self):
+        if self.elapsed == 0:
+            result = 0.0
+        else:
+            result = (self.cur - self.min) / self.elapsed
+        for unit in UNITS:
+            if result < 1000:
+                break
+            result /= 1000.0
+        return '%d %sB/s' % (result, unit)
+
+#
+# Glob functionality
+#
+
+RICH_GLOB = re.compile(r'\{([^}]*)\}')
+_CHECK_RECURSIVE_GLOB = re.compile(r'[^/\\,{]\*\*|\*\*[^/\\,}]')
+_CHECK_MISMATCH_SET = re.compile(r'^[^{]*\}|\{[^}]*$')
+
+
+def iglob(path_glob):
+    """Extended globbing function that supports ** and {opt1,opt2,opt3}."""
+    if _CHECK_RECURSIVE_GLOB.search(path_glob):
+        msg = """invalid glob %r: recursive glob "**" must be used alone"""
+        raise ValueError(msg % path_glob)
+    if _CHECK_MISMATCH_SET.search(path_glob):
+        msg = """invalid glob %r: mismatching set marker '{' or '}'"""
+        raise ValueError(msg % path_glob)
+    return _iglob(path_glob)
+
+
+def _iglob(path_glob):
+    rich_path_glob = RICH_GLOB.split(path_glob, 1)
+    if len(rich_path_glob) > 1:
+        assert len(rich_path_glob) == 3, rich_path_glob
+        prefix, set, suffix = rich_path_glob
+        for item in set.split(','):
+            for path in _iglob(''.join((prefix, item, suffix))):
+                yield path
+    else:
+        if '**' not in path_glob:
+            for item in std_iglob(path_glob):
+                yield item
+        else:
+            prefix, radical = path_glob.split('**', 1)
+            if prefix == '':
+                prefix = '.'
+            if radical == '':
+                radical = '*'
+            else:
+                # we support both
+                radical = radical.lstrip('/')
+                radical = radical.lstrip('\\')
+            for path, dir, files in os.walk(prefix):
+                path = os.path.normpath(path)
+                for fn in _iglob(os.path.join(path, radical)):
+                    yield fn
+
+if ssl:
+    from .compat import (HTTPSHandler as BaseHTTPSHandler, match_hostname,
+                         CertificateError)
+
+
+#
+# HTTPSConnection which verifies certificates/matches domains
+#
+
+    class HTTPSConnection(httplib.HTTPSConnection):
+        ca_certs = None # set this to the path to the certs file (.pem)
+        check_domain = True # only used if ca_certs is not None
+
+        # noinspection PyPropertyAccess
+        def connect(self):
+            sock = socket.create_connection((self.host, self.port), self.timeout)
+            if getattr(self, '_tunnel_host', False):
+                self.sock = sock
+                self._tunnel()
+
+            context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
+            if hasattr(ssl, 'OP_NO_SSLv2'):
+                context.options |= ssl.OP_NO_SSLv2
+            if self.cert_file:
+                context.load_cert_chain(self.cert_file, self.key_file)
+            kwargs = {}
+            if self.ca_certs:
+                context.verify_mode = ssl.CERT_REQUIRED
+                context.load_verify_locations(cafile=self.ca_certs)
+                if getattr(ssl, 'HAS_SNI', False):
+                    kwargs['server_hostname'] = self.host
+
+            self.sock = context.wrap_socket(sock, **kwargs)
+            if self.ca_certs and self.check_domain:
+                try:
+                    match_hostname(self.sock.getpeercert(), self.host)
+                    logger.debug('Host verified: %s', self.host)
+                except CertificateError:  # pragma: no cover
+                    self.sock.shutdown(socket.SHUT_RDWR)
+                    self.sock.close()
+                    raise
+
+    class HTTPSHandler(BaseHTTPSHandler):
+        def __init__(self, ca_certs, check_domain=True):
+            BaseHTTPSHandler.__init__(self)
+            self.ca_certs = ca_certs
+            self.check_domain = check_domain
+
+        def _conn_maker(self, *args, **kwargs):
+            """
+            This is called to create a connection instance. Normally you'd
+            pass a connection class to do_open, but it doesn't actually check for
+            a class, and just expects a callable. As long as we behave just as a
+            constructor would have, we should be OK. If it ever changes so that
+            we *must* pass a class, we'll create an UnsafeHTTPSConnection class
+            which just sets check_domain to False in the class definition, and
+            choose which one to pass to do_open.
+            """
+            result = HTTPSConnection(*args, **kwargs)
+            if self.ca_certs:
+                result.ca_certs = self.ca_certs
+                result.check_domain = self.check_domain
+            return result
+
+        def https_open(self, req):
+            try:
+                return self.do_open(self._conn_maker, req)
+            except URLError as e:
+                if 'certificate verify failed' in str(e.reason):
+                    raise CertificateError('Unable to verify server certificate '
+                                           'for %s' % req.host)
+                else:
+                    raise
+
+    #
+    # To prevent against mixing HTTP traffic with HTTPS (examples: A Man-In-The-
+    # Middle proxy using HTTP listens on port 443, or an index mistakenly serves
+    # HTML containing a http://xyz link when it should be https://xyz),
+    # you can use the following handler class, which does not allow HTTP traffic.
+    #
+    # It works by inheriting from HTTPHandler - so build_opener won't add a
+    # handler for HTTP itself.
+    #
+    class HTTPSOnlyHandler(HTTPSHandler, HTTPHandler):
+        def http_open(self, req):
+            raise URLError('Unexpected HTTP request on what should be a secure '
+                           'connection: %s' % req)
+
+#
+# XML-RPC with timeouts
+#
+class Transport(xmlrpclib.Transport):
+    def __init__(self, timeout, use_datetime=0):
+        self.timeout = timeout
+        xmlrpclib.Transport.__init__(self, use_datetime)
+
+    def make_connection(self, host):
+        h, eh, x509 = self.get_host_info(host)
+        if not self._connection or host != self._connection[0]:
+            self._extra_headers = eh
+            self._connection = host, httplib.HTTPConnection(h)
+        return self._connection[1]
+
+if ssl:
+    class SafeTransport(xmlrpclib.SafeTransport):
+        def __init__(self, timeout, use_datetime=0):
+            self.timeout = timeout
+            xmlrpclib.SafeTransport.__init__(self, use_datetime)
+
+        def make_connection(self, host):
+            h, eh, kwargs = self.get_host_info(host)
+            if not kwargs:
+                kwargs = {}
+            kwargs['timeout'] = self.timeout
+            if not self._connection or host != self._connection[0]:
+                self._extra_headers = eh
+                self._connection = host, httplib.HTTPSConnection(h, None,
+                                                                 **kwargs)
+            return self._connection[1]
+
+
+class ServerProxy(xmlrpclib.ServerProxy):
+    def __init__(self, uri, **kwargs):
+        self.timeout = timeout = kwargs.pop('timeout', None)
+        # The above classes only come into play if a timeout
+        # is specified
+        if timeout is not None:
+            # scheme = splittype(uri)  # deprecated as of Python 3.8
+            scheme = urlparse(uri)[0]
+            use_datetime = kwargs.get('use_datetime', 0)
+            if scheme == 'https':
+                tcls = SafeTransport
+            else:
+                tcls = Transport
+            kwargs['transport'] = t = tcls(timeout, use_datetime=use_datetime)
+            self.transport = t
+        xmlrpclib.ServerProxy.__init__(self, uri, **kwargs)
+
+#
+# CSV functionality. This is provided because on 2.x, the csv module can't
+# handle Unicode. However, we need to deal with Unicode in e.g. RECORD files.
+#
+
+def _csv_open(fn, mode, **kwargs):
+    if sys.version_info[0] < 3:
+        mode += 'b'
+    else:
+        kwargs['newline'] = ''
+        # Python 3 determines encoding from locale. Force 'utf-8'
+        # file encoding to match other forced utf-8 encoding
+        kwargs['encoding'] = 'utf-8'
+    return open(fn, mode, **kwargs)
+
+
+class CSVBase(object):
+    defaults = {
+        'delimiter': str(','),      # The strs are used because we need native
+        'quotechar': str('"'),      # str in the csv API (2.x won't take
+        'lineterminator': str('\n') # Unicode)
+    }
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *exc_info):
+        self.stream.close()
+
+
+class CSVReader(CSVBase):
+    def __init__(self, **kwargs):
+        if 'stream' in kwargs:
+            stream = kwargs['stream']
+            if sys.version_info[0] >= 3:
+                # needs to be a text stream
+                stream = codecs.getreader('utf-8')(stream)
+            self.stream = stream
+        else:
+            self.stream = _csv_open(kwargs['path'], 'r')
+        self.reader = csv.reader(self.stream, **self.defaults)
+
+    def __iter__(self):
+        return self
+
+    def next(self):
+        result = next(self.reader)
+        if sys.version_info[0] < 3:
+            for i, item in enumerate(result):
+                if not isinstance(item, text_type):
+                    result[i] = item.decode('utf-8')
+        return result
+
+    __next__ = next
+
+class CSVWriter(CSVBase):
+    def __init__(self, fn, **kwargs):
+        self.stream = _csv_open(fn, 'w')
+        self.writer = csv.writer(self.stream, **self.defaults)
+
+    def writerow(self, row):
+        if sys.version_info[0] < 3:
+            r = []
+            for item in row:
+                if isinstance(item, text_type):
+                    item = item.encode('utf-8')
+                r.append(item)
+            row = r
+        self.writer.writerow(row)
+
+#
+#   Configurator functionality
+#
+
+class Configurator(BaseConfigurator):
+
+    value_converters = dict(BaseConfigurator.value_converters)
+    value_converters['inc'] = 'inc_convert'
+
+    def __init__(self, config, base=None):
+        super(Configurator, self).__init__(config)
+        self.base = base or os.getcwd()
+
+    def configure_custom(self, config):
+        def convert(o):
+            if isinstance(o, (list, tuple)):
+                result = type(o)([convert(i) for i in o])
+            elif isinstance(o, dict):
+                if '()' in o:
+                    result = self.configure_custom(o)
+                else:
+                    result = {}
+                    for k in o:
+                        result[k] = convert(o[k])
+            else:
+                result = self.convert(o)
+            return result
+
+        c = config.pop('()')
+        if not callable(c):
+            c = self.resolve(c)
+        props = config.pop('.', None)
+        # Check for valid identifiers
+        args = config.pop('[]', ())
+        if args:
+            args = tuple([convert(o) for o in args])
+        items = [(k, convert(config[k])) for k in config if valid_ident(k)]
+        kwargs = dict(items)
+        result = c(*args, **kwargs)
+        if props:
+            for n, v in props.items():
+                setattr(result, n, convert(v))
+        return result
+
+    def __getitem__(self, key):
+        result = self.config[key]
+        if isinstance(result, dict) and '()' in result:
+            self.config[key] = result = self.configure_custom(result)
+        return result
+
+    def inc_convert(self, value):
+        """Default converter for the inc:// protocol."""
+        if not os.path.isabs(value):
+            value = os.path.join(self.base, value)
+        with codecs.open(value, 'r', encoding='utf-8') as f:
+            result = json.load(f)
+        return result
+
+
+class SubprocessMixin(object):
+    """
+    Mixin for running subprocesses and capturing their output
+    """
+    def __init__(self, verbose=False, progress=None):
+        self.verbose = verbose
+        self.progress = progress
+
+    def reader(self, stream, context):
+        """
+        Read lines from a subprocess' output stream and either pass to a progress
+        callable (if specified) or write progress information to sys.stderr.
+        """
+        progress = self.progress
+        verbose = self.verbose
+        while True:
+            s = stream.readline()
+            if not s:
+                break
+            if progress is not None:
+                progress(s, context)
+            else:
+                if not verbose:
+                    sys.stderr.write('.')
+                else:
+                    sys.stderr.write(s.decode('utf-8'))
+                sys.stderr.flush()
+        stream.close()
+
+    def run_command(self, cmd, **kwargs):
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE, **kwargs)
+        t1 = threading.Thread(target=self.reader, args=(p.stdout, 'stdout'))
+        t1.start()
+        t2 = threading.Thread(target=self.reader, args=(p.stderr, 'stderr'))
+        t2.start()
+        p.wait()
+        t1.join()
+        t2.join()
+        if self.progress is not None:
+            self.progress('done.', 'main')
+        elif self.verbose:
+            sys.stderr.write('done.\n')
+        return p
+
+
+def normalize_name(name):
+    """Normalize a python package name a la PEP 503"""
+    # https://www.python.org/dev/peps/pep-0503/#normalized-names
+    return re.sub('[-_.]+', '-', name).lower()
+
+# def _get_pypirc_command():
+    # """
+    # Get the distutils command for interacting with PyPI configurations.
+    # :return: the command.
+    # """
+    # from distutils.core import Distribution
+    # from distutils.config import PyPIRCCommand
+    # d = Distribution()
+    # return PyPIRCCommand(d)
+
+class PyPIRCFile(object):
+
+    DEFAULT_REPOSITORY = 'https://upload.pypi.org/legacy/'
+    DEFAULT_REALM = 'pypi'
+
+    def __init__(self, fn=None, url=None):
+        if fn is None:
+            fn = os.path.join(os.path.expanduser('~'), '.pypirc')
+        self.filename = fn
+        self.url = url
+
+    def read(self):
+        result = {}
+
+        if os.path.exists(self.filename):
+            repository = self.url or self.DEFAULT_REPOSITORY
+
+            config = configparser.RawConfigParser()
+            config.read(self.filename)
+            sections = config.sections()
+            if 'distutils' in sections:
+                # let's get the list of servers
+                index_servers = config.get('distutils', 'index-servers')
+                _servers = [server.strip() for server in
+                            index_servers.split('\n')
+                            if server.strip() != '']
+                if _servers == []:
+                    # nothing set, let's try to get the default pypi
+                    if 'pypi' in sections:
+                        _servers = ['pypi']
+                else:
+                    for server in _servers:
+                        result = {'server': server}
+                        result['username'] = config.get(server, 'username')
+
+                        # optional params
+                        for key, default in (('repository', self.DEFAULT_REPOSITORY),
+                                             ('realm', self.DEFAULT_REALM),
+                                             ('password', None)):
+                            if config.has_option(server, key):
+                                result[key] = config.get(server, key)
+                            else:
+                                result[key] = default
+
+                        # work around people having "repository" for the "pypi"
+                        # section of their config set to the HTTP (rather than
+                        # HTTPS) URL
+                        if (server == 'pypi' and
+                            repository in (self.DEFAULT_REPOSITORY, 'pypi')):
+                            result['repository'] = self.DEFAULT_REPOSITORY
+                        elif (result['server'] != repository and
+                              result['repository'] != repository):
+                            result = {}
+            elif 'server-login' in sections:
+                # old format
+                server = 'server-login'
+                if config.has_option(server, 'repository'):
+                    repository = config.get(server, 'repository')
+                else:
+                    repository = self.DEFAULT_REPOSITORY
+                result = {
+                    'username': config.get(server, 'username'),
+                    'password': config.get(server, 'password'),
+                    'repository': repository,
+                    'server': server,
+                    'realm': self.DEFAULT_REALM
+                }
+        return result
+
+    def update(self, username, password):
+        # import pdb; pdb.set_trace()
+        config = configparser.RawConfigParser()
+        fn = self.filename
+        config.read(fn)
+        if not config.has_section('pypi'):
+            config.add_section('pypi')
+        config.set('pypi', 'username', username)
+        config.set('pypi', 'password', password)
+        with open(fn, 'w') as f:
+            config.write(f)
+
+def _load_pypirc(index):
+    """
+    Read the PyPI access configuration as supported by distutils.
+    """
+    return PyPIRCFile(url=index.url).read()
+
+def _store_pypirc(index):
+    PyPIRCFile().update(index.username, index.password)
+
+#
+# get_platform()/get_host_platform() copied from Python 3.10.a0 source, with some minor
+# tweaks
+#
+
+def get_host_platform():
+    """Return a string that identifies the current platform.  This is used mainly to
+    distinguish platform-specific build directories and platform-specific built
+    distributions.  Typically includes the OS name and version and the
+    architecture (as supplied by 'os.uname()'), although the exact information
+    included depends on the OS; eg. on Linux, the kernel version isn't
+    particularly important.
+
+    Examples of returned values:
+       linux-i586
+       linux-alpha (?)
+       solaris-2.6-sun4u
+
+    Windows will return one of:
+       win-amd64 (64bit Windows on AMD64 (aka x86_64, Intel64, EM64T, etc)
+       win32 (all others - specifically, sys.platform is returned)
+
+    For other non-POSIX platforms, currently just returns 'sys.platform'.
+
+    """
+    if os.name == 'nt':
+        if 'amd64' in sys.version.lower():
+            return 'win-amd64'
+        if '(arm)' in sys.version.lower():
+            return 'win-arm32'
+        if '(arm64)' in sys.version.lower():
+            return 'win-arm64'
+        return sys.platform
+
+    # Set for cross builds explicitly
+    if "_PYTHON_HOST_PLATFORM" in os.environ:
+        return os.environ["_PYTHON_HOST_PLATFORM"]
+
+    if os.name != 'posix' or not hasattr(os, 'uname'):
+        # XXX what about the architecture? NT is Intel or Alpha,
+        # Mac OS is M68k or PPC, etc.
+        return sys.platform
+
+    # Try to distinguish various flavours of Unix
+
+    (osname, host, release, version, machine) = os.uname()
+
+    # Convert the OS name to lowercase, remove '/' characters, and translate
+    # spaces (for "Power Macintosh")
+    osname = osname.lower().replace('/', '')
+    machine = machine.replace(' ', '_').replace('/', '-')
+
+    if osname[:5] == 'linux':
+        # At least on Linux/Intel, 'machine' is the processor --
+        # i386, etc.
+        # XXX what about Alpha, SPARC, etc?
+        return  "%s-%s" % (osname, machine)
+
+    elif osname[:5] == 'sunos':
+        if release[0] >= '5':           # SunOS 5 == Solaris 2
+            osname = 'solaris'
+            release = '%d.%s' % (int(release[0]) - 3, release[2:])
+            # We can't use 'platform.architecture()[0]' because a
+            # bootstrap problem. We use a dict to get an error
+            # if some suspicious happens.
+            bitness = {2147483647:'32bit', 9223372036854775807:'64bit'}
+            machine += '.%s' % bitness[sys.maxsize]
+        # fall through to standard osname-release-machine representation
+    elif osname[:3] == 'aix':
+        from _aix_support import aix_platform
+        return aix_platform()
+    elif osname[:6] == 'cygwin':
+        osname = 'cygwin'
+        rel_re = re.compile (r'[\d.]+', re.ASCII)
+        m = rel_re.match(release)
+        if m:
+            release = m.group()
+    elif osname[:6] == 'darwin':
+        import _osx_support, distutils.sysconfig
+        osname, release, machine = _osx_support.get_platform_osx(
+                                        distutils.sysconfig.get_config_vars(),
+                                        osname, release, machine)
+
+    return '%s-%s-%s' % (osname, release, machine)
+
+
+_TARGET_TO_PLAT = {
+    'x86' : 'win32',
+    'x64' : 'win-amd64',
+    'arm' : 'win-arm32',
+}
+
+
+def get_platform():
+    if os.name != 'nt':
+        return get_host_platform()
+    cross_compilation_target = os.environ.get('VSCMD_ARG_TGT_ARCH')
+    if cross_compilation_target not in _TARGET_TO_PLAT:
+        return get_host_platform()
+    return _TARGET_TO_PLAT[cross_compilation_target]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/version.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/version.py
new file mode 100644
index 0000000..c7c8bb6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/version.py
@@ -0,0 +1,739 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2012-2017 The Python Software Foundation.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+"""
+Implementation of a flexible versioning scheme providing support for PEP-440,
+setuptools-compatible and semantic versioning.
+"""
+
+import logging
+import re
+
+from .compat import string_types
+from .util import parse_requirement
+
+__all__ = ['NormalizedVersion', 'NormalizedMatcher',
+           'LegacyVersion', 'LegacyMatcher',
+           'SemanticVersion', 'SemanticMatcher',
+           'UnsupportedVersionError', 'get_scheme']
+
+logger = logging.getLogger(__name__)
+
+
+class UnsupportedVersionError(ValueError):
+    """This is an unsupported version."""
+    pass
+
+
+class Version(object):
+    def __init__(self, s):
+        self._string = s = s.strip()
+        self._parts = parts = self.parse(s)
+        assert isinstance(parts, tuple)
+        assert len(parts) > 0
+
+    def parse(self, s):
+        raise NotImplementedError('please implement in a subclass')
+
+    def _check_compatible(self, other):
+        if type(self) != type(other):
+            raise TypeError('cannot compare %r and %r' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __lt__(self, other):
+        self._check_compatible(other)
+        return self._parts < other._parts
+
+    def __gt__(self, other):
+        return not (self.__lt__(other) or self.__eq__(other))
+
+    def __le__(self, other):
+        return self.__lt__(other) or self.__eq__(other)
+
+    def __ge__(self, other):
+        return self.__gt__(other) or self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self._parts)
+
+    def __repr__(self):
+        return "%s('%s')" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+    @property
+    def is_prerelease(self):
+        raise NotImplementedError('Please implement in subclasses.')
+
+
+class Matcher(object):
+    version_class = None
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '<': lambda v, c, p: v < c,
+        '>': lambda v, c, p: v > c,
+        '<=': lambda v, c, p: v == c or v < c,
+        '>=': lambda v, c, p: v == c or v > c,
+        '==': lambda v, c, p: v == c,
+        '===': lambda v, c, p: v == c,
+        # by default, compatible => >=.
+        '~=': lambda v, c, p: v == c or v > c,
+        '!=': lambda v, c, p: v != c,
+    }
+
+    # this is a method only to support alternative implementations
+    # via overriding
+    def parse_requirement(self, s):
+        return parse_requirement(s)
+
+    def __init__(self, s):
+        if self.version_class is None:
+            raise ValueError('Please specify a version class')
+        self._string = s = s.strip()
+        r = self.parse_requirement(s)
+        if not r:
+            raise ValueError('Not valid: %r' % s)
+        self.name = r.name
+        self.key = self.name.lower()    # for case-insensitive comparisons
+        clist = []
+        if r.constraints:
+            # import pdb; pdb.set_trace()
+            for op, s in r.constraints:
+                if s.endswith('.*'):
+                    if op not in ('==', '!='):
+                        raise ValueError('\'.*\' not allowed for '
+                                         '%r constraints' % op)
+                    # Could be a partial version (e.g. for '2.*') which
+                    # won't parse as a version, so keep it as a string
+                    vn, prefix = s[:-2], True
+                    # Just to check that vn is a valid version
+                    self.version_class(vn)
+                else:
+                    # Should parse as a version, so we can create an
+                    # instance for the comparison
+                    vn, prefix = self.version_class(s), False
+                clist.append((op, vn, prefix))
+        self._parts = tuple(clist)
+
+    def match(self, version):
+        """
+        Check if the provided version matches the constraints.
+
+        :param version: The version to match against this instance.
+        :type version: String or :class:`Version` instance.
+        """
+        if isinstance(version, string_types):
+            version = self.version_class(version)
+        for operator, constraint, prefix in self._parts:
+            f = self._operators.get(operator)
+            if isinstance(f, string_types):
+                f = getattr(self, f)
+            if not f:
+                msg = ('%r not implemented '
+                       'for %s' % (operator, self.__class__.__name__))
+                raise NotImplementedError(msg)
+            if not f(version, constraint, prefix):
+                return False
+        return True
+
+    @property
+    def exact_version(self):
+        result = None
+        if len(self._parts) == 1 and self._parts[0][0] in ('==', '==='):
+            result = self._parts[0][1]
+        return result
+
+    def _check_compatible(self, other):
+        if type(self) != type(other) or self.name != other.name:
+            raise TypeError('cannot compare %s and %s' % (self, other))
+
+    def __eq__(self, other):
+        self._check_compatible(other)
+        return self.key == other.key and self._parts == other._parts
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    # See http://docs.python.org/reference/datamodel#object.__hash__
+    def __hash__(self):
+        return hash(self.key) + hash(self._parts)
+
+    def __repr__(self):
+        return "%s(%r)" % (self.__class__.__name__, self._string)
+
+    def __str__(self):
+        return self._string
+
+
+PEP440_VERSION_RE = re.compile(r'^v?(\d+!)?(\d+(\.\d+)*)((a|b|c|rc)(\d+))?'
+                               r'(\.(post)(\d+))?(\.(dev)(\d+))?'
+                               r'(\+([a-zA-Z\d]+(\.[a-zA-Z\d]+)?))?$')
+
+
+def _pep_440_key(s):
+    s = s.strip()
+    m = PEP440_VERSION_RE.match(s)
+    if not m:
+        raise UnsupportedVersionError('Not a valid version: %s' % s)
+    groups = m.groups()
+    nums = tuple(int(v) for v in groups[1].split('.'))
+    while len(nums) > 1 and nums[-1] == 0:
+        nums = nums[:-1]
+
+    if not groups[0]:
+        epoch = 0
+    else:
+        epoch = int(groups[0][:-1])
+    pre = groups[4:6]
+    post = groups[7:9]
+    dev = groups[10:12]
+    local = groups[13]
+    if pre == (None, None):
+        pre = ()
+    else:
+        pre = pre[0], int(pre[1])
+    if post == (None, None):
+        post = ()
+    else:
+        post = post[0], int(post[1])
+    if dev == (None, None):
+        dev = ()
+    else:
+        dev = dev[0], int(dev[1])
+    if local is None:
+        local = ()
+    else:
+        parts = []
+        for part in local.split('.'):
+            # to ensure that numeric compares as > lexicographic, avoid
+            # comparing them directly, but encode a tuple which ensures
+            # correct sorting
+            if part.isdigit():
+                part = (1, int(part))
+            else:
+                part = (0, part)
+            parts.append(part)
+        local = tuple(parts)
+    if not pre:
+        # either before pre-release, or final release and after
+        if not post and dev:
+            # before pre-release
+            pre = ('a', -1)     # to sort before a0
+        else:
+            pre = ('z',)        # to sort after all pre-releases
+    # now look at the state of post and dev.
+    if not post:
+        post = ('_',)   # sort before 'a'
+    if not dev:
+        dev = ('final',)
+
+    #print('%s -> %s' % (s, m.groups()))
+    return epoch, nums, pre, post, dev, local
+
+
+_normalized_key = _pep_440_key
+
+
+class NormalizedVersion(Version):
+    """A rational version.
+
+    Good:
+        1.2         # equivalent to "1.2.0"
+        1.2.0
+        1.2a1
+        1.2.3a2
+        1.2.3b1
+        1.2.3c1
+        1.2.3.4
+        TODO: fill this out
+
+    Bad:
+        1           # minimum two numbers
+        1.2a        # release level must have a release serial
+        1.2.3b
+    """
+    def parse(self, s):
+        result = _normalized_key(s)
+        # _normalized_key loses trailing zeroes in the release
+        # clause, since that's needed to ensure that X.Y == X.Y.0 == X.Y.0.0
+        # However, PEP 440 prefix matching needs it: for example,
+        # (~= 1.4.5.0) matches differently to (~= 1.4.5.0.0).
+        m = PEP440_VERSION_RE.match(s)      # must succeed
+        groups = m.groups()
+        self._release_clause = tuple(int(v) for v in groups[1].split('.'))
+        return result
+
+    PREREL_TAGS = set(['a', 'b', 'c', 'rc', 'dev'])
+
+    @property
+    def is_prerelease(self):
+        return any(t[0] in self.PREREL_TAGS for t in self._parts if t)
+
+
+def _match_prefix(x, y):
+    x = str(x)
+    y = str(y)
+    if x == y:
+        return True
+    if not x.startswith(y):
+        return False
+    n = len(y)
+    return x[n] == '.'
+
+
+class NormalizedMatcher(Matcher):
+    version_class = NormalizedVersion
+
+    # value is either a callable or the name of a method
+    _operators = {
+        '~=': '_match_compatible',
+        '<': '_match_lt',
+        '>': '_match_gt',
+        '<=': '_match_le',
+        '>=': '_match_ge',
+        '==': '_match_eq',
+        '===': '_match_arbitrary',
+        '!=': '_match_ne',
+    }
+
+    def _adjust_local(self, version, constraint, prefix):
+        if prefix:
+            strip_local = '+' not in constraint and version._parts[-1]
+        else:
+            # both constraint and version are
+            # NormalizedVersion instances.
+            # If constraint does not have a local component,
+            # ensure the version doesn't, either.
+            strip_local = not constraint._parts[-1] and version._parts[-1]
+        if strip_local:
+            s = version._string.split('+', 1)[0]
+            version = self.version_class(s)
+        return version, constraint
+
+    def _match_lt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version >= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_gt(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version <= constraint:
+            return False
+        release_clause = constraint._release_clause
+        pfx = '.'.join([str(i) for i in release_clause])
+        return not _match_prefix(version, pfx)
+
+    def _match_le(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version <= constraint
+
+    def _match_ge(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        return version >= constraint
+
+    def _match_eq(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version == constraint)
+        else:
+            result = _match_prefix(version, constraint)
+        return result
+
+    def _match_arbitrary(self, version, constraint, prefix):
+        return str(version) == str(constraint)
+
+    def _match_ne(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if not prefix:
+            result = (version != constraint)
+        else:
+            result = not _match_prefix(version, constraint)
+        return result
+
+    def _match_compatible(self, version, constraint, prefix):
+        version, constraint = self._adjust_local(version, constraint, prefix)
+        if version == constraint:
+            return True
+        if version < constraint:
+            return False
+#        if not prefix:
+#            return True
+        release_clause = constraint._release_clause
+        if len(release_clause) > 1:
+            release_clause = release_clause[:-1]
+        pfx = '.'.join([str(i) for i in release_clause])
+        return _match_prefix(version, pfx)
+
+_REPLACEMENTS = (
+    (re.compile('[.+-]$'), ''),                     # remove trailing puncts
+    (re.compile(r'^[.](\d)'), r'0.\1'),             # .N -> 0.N at start
+    (re.compile('^[.-]'), ''),                      # remove leading puncts
+    (re.compile(r'^\((.*)\)$'), r'\1'),             # remove parentheses
+    (re.compile(r'^v(ersion)?\s*(\d+)'), r'\2'),    # remove leading v(ersion)
+    (re.compile(r'^r(ev)?\s*(\d+)'), r'\2'),        # remove leading v(ersion)
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\b(alfa|apha)\b'), 'alpha'),      # misspelt alpha
+    (re.compile(r'\b(pre-alpha|prealpha)\b'),
+                'pre.alpha'),                       # standardise
+    (re.compile(r'\(beta\)$'), 'beta'),             # remove parentheses
+)
+
+_SUFFIX_REPLACEMENTS = (
+    (re.compile('^[:~._+-]+'), ''),                   # remove leading puncts
+    (re.compile('[,*")([\\]]'), ''),                  # remove unwanted chars
+    (re.compile('[~:+_ -]'), '.'),                    # replace illegal chars
+    (re.compile('[.]{2,}'), '.'),                   # multiple runs of '.'
+    (re.compile(r'\.$'), ''),                       # trailing '.'
+)
+
+_NUMERIC_PREFIX = re.compile(r'(\d+(\.\d+)*)')
+
+
+def _suggest_semantic_version(s):
+    """
+    Try to suggest a semantic form for a version for which
+    _suggest_normalized_version couldn't come up with anything.
+    """
+    result = s.strip().lower()
+    for pat, repl in _REPLACEMENTS:
+        result = pat.sub(repl, result)
+    if not result:
+        result = '0.0.0'
+
+    # Now look for numeric prefix, and separate it out from
+    # the rest.
+    #import pdb; pdb.set_trace()
+    m = _NUMERIC_PREFIX.match(result)
+    if not m:
+        prefix = '0.0.0'
+        suffix = result
+    else:
+        prefix = m.groups()[0].split('.')
+        prefix = [int(i) for i in prefix]
+        while len(prefix) < 3:
+            prefix.append(0)
+        if len(prefix) == 3:
+            suffix = result[m.end():]
+        else:
+            suffix = '.'.join([str(i) for i in prefix[3:]]) + result[m.end():]
+            prefix = prefix[:3]
+        prefix = '.'.join([str(i) for i in prefix])
+        suffix = suffix.strip()
+    if suffix:
+        #import pdb; pdb.set_trace()
+        # massage the suffix.
+        for pat, repl in _SUFFIX_REPLACEMENTS:
+            suffix = pat.sub(repl, suffix)
+
+    if not suffix:
+        result = prefix
+    else:
+        sep = '-' if 'dev' in suffix else '+'
+        result = prefix + sep + suffix
+    if not is_semver(result):
+        result = None
+    return result
+
+
+def _suggest_normalized_version(s):
+    """Suggest a normalized version close to the given version string.
+
+    If you have a version string that isn't rational (i.e. NormalizedVersion
+    doesn't like it) then you might be able to get an equivalent (or close)
+    rational version from this function.
+
+    This does a number of simple normalizations to the given string, based
+    on observation of versions currently in use on PyPI. Given a dump of
+    those version during PyCon 2009, 4287 of them:
+    - 2312 (53.93%) match NormalizedVersion without change
+      with the automatic suggestion
+    - 3474 (81.04%) match when using this suggestion method
+
+    @param s {str} An irrational version string.
+    @returns A rational version string, or None, if couldn't determine one.
+    """
+    try:
+        _normalized_key(s)
+        return s   # already rational
+    except UnsupportedVersionError:
+        pass
+
+    rs = s.lower()
+
+    # part of this could use maketrans
+    for orig, repl in (('-alpha', 'a'), ('-beta', 'b'), ('alpha', 'a'),
+                       ('beta', 'b'), ('rc', 'c'), ('-final', ''),
+                       ('-pre', 'c'),
+                       ('-release', ''), ('.release', ''), ('-stable', ''),
+                       ('+', '.'), ('_', '.'), (' ', ''), ('.final', ''),
+                       ('final', '')):
+        rs = rs.replace(orig, repl)
+
+    # if something ends with dev or pre, we add a 0
+    rs = re.sub(r"pre$", r"pre0", rs)
+    rs = re.sub(r"dev$", r"dev0", rs)
+
+    # if we have something like "b-2" or "a.2" at the end of the
+    # version, that is probably beta, alpha, etc
+    # let's remove the dash or dot
+    rs = re.sub(r"([abc]|rc)[\-\.](\d+)$", r"\1\2", rs)
+
+    # 1.0-dev-r371 -> 1.0.dev371
+    # 0.1-dev-r79 -> 0.1.dev79
+    rs = re.sub(r"[\-\.](dev)[\-\.]?r?(\d+)$", r".\1\2", rs)
+
+    # Clean: 2.0.a.3, 2.0.b1, 0.9.0~c1
+    rs = re.sub(r"[.~]?([abc])\.?", r"\1", rs)
+
+    # Clean: v0.3, v1.0
+    if rs.startswith('v'):
+        rs = rs[1:]
+
+    # Clean leading '0's on numbers.
+    #TODO: unintended side-effect on, e.g., "2003.05.09"
+    # PyPI stats: 77 (~2%) better
+    rs = re.sub(r"\b0+(\d+)(?!\d)", r"\1", rs)
+
+    # Clean a/b/c with no version. E.g. "1.0a" -> "1.0a0". Setuptools infers
+    # zero.
+    # PyPI stats: 245 (7.56%) better
+    rs = re.sub(r"(\d+[abc])$", r"\g<1>0", rs)
+
+    # the 'dev-rNNN' tag is a dev tag
+    rs = re.sub(r"\.?(dev-r|dev\.r)\.?(\d+)$", r".dev\2", rs)
+
+    # clean the - when used as a pre delimiter
+    rs = re.sub(r"-(a|b|c)(\d+)$", r"\1\2", rs)
+
+    # a terminal "dev" or "devel" can be changed into ".dev0"
+    rs = re.sub(r"[\.\-](dev|devel)$", r".dev0", rs)
+
+    # a terminal "dev" can be changed into ".dev0"
+    rs = re.sub(r"(?![\.\-])dev$", r".dev0", rs)
+
+    # a terminal "final" or "stable" can be removed
+    rs = re.sub(r"(final|stable)$", "", rs)
+
+    # The 'r' and the '-' tags are post release tags
+    #   0.4a1.r10       ->  0.4a1.post10
+    #   0.9.33-17222    ->  0.9.33.post17222
+    #   0.9.33-r17222   ->  0.9.33.post17222
+    rs = re.sub(r"\.?(r|-|-r)\.?(\d+)$", r".post\2", rs)
+
+    # Clean 'r' instead of 'dev' usage:
+    #   0.9.33+r17222   ->  0.9.33.dev17222
+    #   1.0dev123       ->  1.0.dev123
+    #   1.0.git123      ->  1.0.dev123
+    #   1.0.bzr123      ->  1.0.dev123
+    #   0.1a0dev.123    ->  0.1a0.dev123
+    # PyPI stats:  ~150 (~4%) better
+    rs = re.sub(r"\.?(dev|git|bzr)\.?(\d+)$", r".dev\2", rs)
+
+    # Clean '.pre' (normalized from '-pre' above) instead of 'c' usage:
+    #   0.2.pre1        ->  0.2c1
+    #   0.2-c1         ->  0.2c1
+    #   1.0preview123   ->  1.0c123
+    # PyPI stats: ~21 (0.62%) better
+    rs = re.sub(r"\.?(pre|preview|-c)(\d+)$", r"c\g<2>", rs)
+
+    # Tcl/Tk uses "px" for their post release markers
+    rs = re.sub(r"p(\d+)$", r".post\1", rs)
+
+    try:
+        _normalized_key(rs)
+    except UnsupportedVersionError:
+        rs = None
+    return rs
+
+#
+#   Legacy version processing (distribute-compatible)
+#
+
+_VERSION_PART = re.compile(r'([a-z]+|\d+|[\.-])', re.I)
+_VERSION_REPLACE = {
+    'pre': 'c',
+    'preview': 'c',
+    '-': 'final-',
+    'rc': 'c',
+    'dev': '@',
+    '': None,
+    '.': None,
+}
+
+
+def _legacy_key(s):
+    def get_parts(s):
+        result = []
+        for p in _VERSION_PART.split(s.lower()):
+            p = _VERSION_REPLACE.get(p, p)
+            if p:
+                if '0' <= p[:1] <= '9':
+                    p = p.zfill(8)
+                else:
+                    p = '*' + p
+                result.append(p)
+        result.append('*final')
+        return result
+
+    result = []
+    for p in get_parts(s):
+        if p.startswith('*'):
+            if p < '*final':
+                while result and result[-1] == '*final-':
+                    result.pop()
+            while result and result[-1] == '00000000':
+                result.pop()
+        result.append(p)
+    return tuple(result)
+
+
+class LegacyVersion(Version):
+    def parse(self, s):
+        return _legacy_key(s)
+
+    @property
+    def is_prerelease(self):
+        result = False
+        for x in self._parts:
+            if (isinstance(x, string_types) and x.startswith('*') and
+                x < '*final'):
+                result = True
+                break
+        return result
+
+
+class LegacyMatcher(Matcher):
+    version_class = LegacyVersion
+
+    _operators = dict(Matcher._operators)
+    _operators['~='] = '_match_compatible'
+
+    numeric_re = re.compile(r'^(\d+(\.\d+)*)')
+
+    def _match_compatible(self, version, constraint, prefix):
+        if version < constraint:
+            return False
+        m = self.numeric_re.match(str(constraint))
+        if not m:
+            logger.warning('Cannot compute compatible match for version %s '
+                           ' and constraint %s', version, constraint)
+            return True
+        s = m.groups()[0]
+        if '.' in s:
+            s = s.rsplit('.', 1)[0]
+        return _match_prefix(version, s)
+
+#
+#   Semantic versioning
+#
+
+_SEMVER_RE = re.compile(r'^(\d+)\.(\d+)\.(\d+)'
+                        r'(-[a-z0-9]+(\.[a-z0-9-]+)*)?'
+                        r'(\+[a-z0-9]+(\.[a-z0-9-]+)*)?$', re.I)
+
+
+def is_semver(s):
+    return _SEMVER_RE.match(s)
+
+
+def _semantic_key(s):
+    def make_tuple(s, absent):
+        if s is None:
+            result = (absent,)
+        else:
+            parts = s[1:].split('.')
+            # We can't compare ints and strings on Python 3, so fudge it
+            # by zero-filling numeric values so simulate a numeric comparison
+            result = tuple([p.zfill(8) if p.isdigit() else p for p in parts])
+        return result
+
+    m = is_semver(s)
+    if not m:
+        raise UnsupportedVersionError(s)
+    groups = m.groups()
+    major, minor, patch = [int(i) for i in groups[:3]]
+    # choose the '|' and '*' so that versions sort correctly
+    pre, build = make_tuple(groups[3], '|'), make_tuple(groups[5], '*')
+    return (major, minor, patch), pre, build
+
+
+class SemanticVersion(Version):
+    def parse(self, s):
+        return _semantic_key(s)
+
+    @property
+    def is_prerelease(self):
+        return self._parts[1][0] != '|'
+
+
+class SemanticMatcher(Matcher):
+    version_class = SemanticVersion
+
+
+class VersionScheme(object):
+    def __init__(self, key, matcher, suggester=None):
+        self.key = key
+        self.matcher = matcher
+        self.suggester = suggester
+
+    def is_valid_version(self, s):
+        try:
+            self.matcher.version_class(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_matcher(self, s):
+        try:
+            self.matcher(s)
+            result = True
+        except UnsupportedVersionError:
+            result = False
+        return result
+
+    def is_valid_constraint_list(self, s):
+        """
+        Used for processing some metadata fields
+        """
+        # See issue #140. Be tolerant of a single trailing comma.
+        if s.endswith(','):
+            s = s[:-1]
+        return self.is_valid_matcher('dummy_name (%s)' % s)
+
+    def suggest(self, s):
+        if self.suggester is None:
+            result = None
+        else:
+            result = self.suggester(s)
+        return result
+
+_SCHEMES = {
+    'normalized': VersionScheme(_normalized_key, NormalizedMatcher,
+                                _suggest_normalized_version),
+    'legacy': VersionScheme(_legacy_key, LegacyMatcher, lambda self, s: s),
+    'semantic': VersionScheme(_semantic_key, SemanticMatcher,
+                              _suggest_semantic_version),
+}
+
+_SCHEMES['default'] = _SCHEMES['normalized']
+
+
+def get_scheme(name):
+    if name not in _SCHEMES:
+        raise ValueError('unknown scheme name: %r' % name)
+    return _SCHEMES[name]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w32.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w32.exe
new file mode 100644
index 0000000..4ee2d3a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w32.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64-arm.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64-arm.exe
new file mode 100644
index 0000000..951d581
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64-arm.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64.exe b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64.exe
new file mode 100644
index 0000000..5763076
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/w64.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distlib/wheel.py b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/wheel.py
new file mode 100644
index 0000000..028c2d9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distlib/wheel.py
@@ -0,0 +1,1082 @@
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2013-2020 Vinay Sajip.
+# Licensed to the Python Software Foundation under a contributor agreement.
+# See LICENSE.txt and CONTRIBUTORS.txt.
+#
+from __future__ import unicode_literals
+
+import base64
+import codecs
+import datetime
+from email import message_from_file
+import hashlib
+import json
+import logging
+import os
+import posixpath
+import re
+import shutil
+import sys
+import tempfile
+import zipfile
+
+from . import __version__, DistlibException
+from .compat import sysconfig, ZipFile, fsdecode, text_type, filter
+from .database import InstalledDistribution
+from .metadata import (Metadata, METADATA_FILENAME, WHEEL_METADATA_FILENAME,
+                       LEGACY_METADATA_FILENAME)
+from .util import (FileOperator, convert_path, CSVReader, CSVWriter, Cache,
+                   cached_property, get_cache_base, read_exports, tempdir,
+                   get_platform)
+from .version import NormalizedVersion, UnsupportedVersionError
+
+logger = logging.getLogger(__name__)
+
+cache = None    # created when needed
+
+if hasattr(sys, 'pypy_version_info'):  # pragma: no cover
+    IMP_PREFIX = 'pp'
+elif sys.platform.startswith('java'):  # pragma: no cover
+    IMP_PREFIX = 'jy'
+elif sys.platform == 'cli':  # pragma: no cover
+    IMP_PREFIX = 'ip'
+else:
+    IMP_PREFIX = 'cp'
+
+VER_SUFFIX = sysconfig.get_config_var('py_version_nodot')
+if not VER_SUFFIX:   # pragma: no cover
+    VER_SUFFIX = '%s%s' % sys.version_info[:2]
+PYVER = 'py' + VER_SUFFIX
+IMPVER = IMP_PREFIX + VER_SUFFIX
+
+ARCH = get_platform().replace('-', '_').replace('.', '_')
+
+ABI = sysconfig.get_config_var('SOABI')
+if ABI and ABI.startswith('cpython-'):
+    ABI = ABI.replace('cpython-', 'cp').split('-')[0]
+else:
+    def _derive_abi():
+        parts = ['cp', VER_SUFFIX]
+        if sysconfig.get_config_var('Py_DEBUG'):
+            parts.append('d')
+        if IMP_PREFIX == 'cp':
+            vi = sys.version_info[:2]
+            if vi < (3, 8):
+                wpm = sysconfig.get_config_var('WITH_PYMALLOC')
+                if wpm is None:
+                    wpm = True
+                if wpm:
+                    parts.append('m')
+                if vi < (3, 3):
+                    us = sysconfig.get_config_var('Py_UNICODE_SIZE')
+                    if us == 4 or (us is None and sys.maxunicode == 0x10FFFF):
+                        parts.append('u')
+        return ''.join(parts)
+    ABI = _derive_abi()
+    del _derive_abi
+
+FILENAME_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?
+-(?P<py>\w+\d+(\.\w+\d+)*)
+-(?P<bi>\w+)
+-(?P<ar>\w+(\.\w+)*)
+\.whl$
+''', re.IGNORECASE | re.VERBOSE)
+
+NAME_VERSION_RE = re.compile(r'''
+(?P<nm>[^-]+)
+-(?P<vn>\d+[^-]*)
+(-(?P<bn>\d+[^-]*))?$
+''', re.IGNORECASE | re.VERBOSE)
+
+SHEBANG_RE = re.compile(br'\s*#![^\r\n]*')
+SHEBANG_DETAIL_RE = re.compile(br'^(\s*#!("[^"]+"|\S+))\s+(.*)$')
+SHEBANG_PYTHON = b'#!python'
+SHEBANG_PYTHONW = b'#!pythonw'
+
+if os.sep == '/':
+    to_posix = lambda o: o
+else:
+    to_posix = lambda o: o.replace(os.sep, '/')
+
+if sys.version_info[0] < 3:
+    import imp
+else:
+    imp = None
+    import importlib.machinery
+    import importlib.util
+
+def _get_suffixes():
+    if imp:
+        return [s[0] for s in imp.get_suffixes()]
+    else:
+        return importlib.machinery.EXTENSION_SUFFIXES
+
+def _load_dynamic(name, path):
+    # https://docs.python.org/3/library/importlib.html#importing-a-source-file-directly
+    if imp:
+        return imp.load_dynamic(name, path)
+    else:
+        spec = importlib.util.spec_from_file_location(name, path)
+        module = importlib.util.module_from_spec(spec)
+        sys.modules[name] = module
+        spec.loader.exec_module(module)
+        return module
+
+class Mounter(object):
+    def __init__(self):
+        self.impure_wheels = {}
+        self.libs = {}
+
+    def add(self, pathname, extensions):
+        self.impure_wheels[pathname] = extensions
+        self.libs.update(extensions)
+
+    def remove(self, pathname):
+        extensions = self.impure_wheels.pop(pathname)
+        for k, v in extensions:
+            if k in self.libs:
+                del self.libs[k]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.libs:
+            result = self
+        else:
+            result = None
+        return result
+
+    def load_module(self, fullname):
+        if fullname in sys.modules:
+            result = sys.modules[fullname]
+        else:
+            if fullname not in self.libs:
+                raise ImportError('unable to find extension for %s' % fullname)
+            result = _load_dynamic(fullname, self.libs[fullname])
+            result.__loader__ = self
+            parts = fullname.rsplit('.', 1)
+            if len(parts) > 1:
+                result.__package__ = parts[0]
+        return result
+
+_hook = Mounter()
+
+
+class Wheel(object):
+    """
+    Class to build and install from Wheel files (PEP 427).
+    """
+
+    wheel_version = (1, 1)
+    hash_kind = 'sha256'
+
+    def __init__(self, filename=None, sign=False, verify=False):
+        """
+        Initialise an instance using a (valid) filename.
+        """
+        self.sign = sign
+        self.should_verify = verify
+        self.buildver = ''
+        self.pyver = [PYVER]
+        self.abi = ['none']
+        self.arch = ['any']
+        self.dirname = os.getcwd()
+        if filename is None:
+            self.name = 'dummy'
+            self.version = '0.1'
+            self._filename = self.filename
+        else:
+            m = NAME_VERSION_RE.match(filename)
+            if m:
+                info = m.groupdict('')
+                self.name = info['nm']
+                # Reinstate the local version separator
+                self.version = info['vn'].replace('_', '-')
+                self.buildver = info['bn']
+                self._filename = self.filename
+            else:
+                dirname, filename = os.path.split(filename)
+                m = FILENAME_RE.match(filename)
+                if not m:
+                    raise DistlibException('Invalid name or '
+                                           'filename: %r' % filename)
+                if dirname:
+                    self.dirname = os.path.abspath(dirname)
+                self._filename = filename
+                info = m.groupdict('')
+                self.name = info['nm']
+                self.version = info['vn']
+                self.buildver = info['bn']
+                self.pyver = info['py'].split('.')
+                self.abi = info['bi'].split('.')
+                self.arch = info['ar'].split('.')
+
+    @property
+    def filename(self):
+        """
+        Build and return a filename from the various components.
+        """
+        if self.buildver:
+            buildver = '-' + self.buildver
+        else:
+            buildver = ''
+        pyver = '.'.join(self.pyver)
+        abi = '.'.join(self.abi)
+        arch = '.'.join(self.arch)
+        # replace - with _ as a local version separator
+        version = self.version.replace('-', '_')
+        return '%s-%s%s-%s-%s-%s.whl' % (self.name, version, buildver,
+                                         pyver, abi, arch)
+
+    @property
+    def exists(self):
+        path = os.path.join(self.dirname, self.filename)
+        return os.path.isfile(path)
+
+    @property
+    def tags(self):
+        for pyver in self.pyver:
+            for abi in self.abi:
+                for arch in self.arch:
+                    yield pyver, abi, arch
+
+    @cached_property
+    def metadata(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        wrapper = codecs.getreader('utf-8')
+        with ZipFile(pathname, 'r') as zf:
+            wheel_metadata = self.get_wheel_metadata(zf)
+            wv = wheel_metadata['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            # if file_version < (1, 1):
+                # fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME,
+                       # LEGACY_METADATA_FILENAME]
+            # else:
+                # fns = [WHEEL_METADATA_FILENAME, METADATA_FILENAME]
+            fns = [WHEEL_METADATA_FILENAME, LEGACY_METADATA_FILENAME]
+            result = None
+            for fn in fns:
+                try:
+                    metadata_filename = posixpath.join(info_dir, fn)
+                    with zf.open(metadata_filename) as bf:
+                        wf = wrapper(bf)
+                        result = Metadata(fileobj=wf)
+                        if result:
+                            break
+                except KeyError:
+                    pass
+            if not result:
+                raise ValueError('Invalid wheel, because metadata is '
+                                 'missing: looked in %s' % ', '.join(fns))
+        return result
+
+    def get_wheel_metadata(self, zf):
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        metadata_filename = posixpath.join(info_dir, 'WHEEL')
+        with zf.open(metadata_filename) as bf:
+            wf = codecs.getreader('utf-8')(bf)
+            message = message_from_file(wf)
+        return dict(message)
+
+    @cached_property
+    def info(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        with ZipFile(pathname, 'r') as zf:
+            result = self.get_wheel_metadata(zf)
+        return result
+
+    def process_shebang(self, data):
+        m = SHEBANG_RE.match(data)
+        if m:
+            end = m.end()
+            shebang, data_after_shebang = data[:end], data[end:]
+            # Preserve any arguments after the interpreter
+            if b'pythonw' in shebang.lower():
+                shebang_python = SHEBANG_PYTHONW
+            else:
+                shebang_python = SHEBANG_PYTHON
+            m = SHEBANG_DETAIL_RE.match(shebang)
+            if m:
+                args = b' ' + m.groups()[-1]
+            else:
+                args = b''
+            shebang = shebang_python + args
+            data = shebang + data_after_shebang
+        else:
+            cr = data.find(b'\r')
+            lf = data.find(b'\n')
+            if cr < 0 or cr > lf:
+                term = b'\n'
+            else:
+                if data[cr:cr + 2] == b'\r\n':
+                    term = b'\r\n'
+                else:
+                    term = b'\r'
+            data = SHEBANG_PYTHON + term + data
+        return data
+
+    def get_hash(self, data, hash_kind=None):
+        if hash_kind is None:
+            hash_kind = self.hash_kind
+        try:
+            hasher = getattr(hashlib, hash_kind)
+        except AttributeError:
+            raise DistlibException('Unsupported hash algorithm: %r' % hash_kind)
+        result = hasher(data).digest()
+        result = base64.urlsafe_b64encode(result).rstrip(b'=').decode('ascii')
+        return hash_kind, result
+
+    def write_record(self, records, record_path, archive_record_path):
+        records = list(records) # make a copy, as mutated
+        records.append((archive_record_path, '', ''))
+        with CSVWriter(record_path) as writer:
+            for row in records:
+                writer.writerow(row)
+
+    def write_records(self, info, libdir, archive_paths):
+        records = []
+        distinfo, info_dir = info
+        hasher = getattr(hashlib, self.hash_kind)
+        for ap, p in archive_paths:
+            with open(p, 'rb') as f:
+                data = f.read()
+            digest = '%s=%s' % self.get_hash(data)
+            size = os.path.getsize(p)
+            records.append((ap, digest, size))
+
+        p = os.path.join(distinfo, 'RECORD')
+        ap = to_posix(os.path.join(info_dir, 'RECORD'))
+        self.write_record(records, p, ap)
+        archive_paths.append((ap, p))
+
+    def build_zip(self, pathname, archive_paths):
+        with ZipFile(pathname, 'w', zipfile.ZIP_DEFLATED) as zf:
+            for ap, p in archive_paths:
+                logger.debug('Wrote %s to %s in wheel', p, ap)
+                zf.write(p, ap)
+
+    def build(self, paths, tags=None, wheel_version=None):
+        """
+        Build a wheel from files in specified paths, and use any specified tags
+        when determining the name of the wheel.
+        """
+        if tags is None:
+            tags = {}
+
+        libkey = list(filter(lambda o: o in paths, ('purelib', 'platlib')))[0]
+        if libkey == 'platlib':
+            is_pure = 'false'
+            default_pyver = [IMPVER]
+            default_abi = [ABI]
+            default_arch = [ARCH]
+        else:
+            is_pure = 'true'
+            default_pyver = [PYVER]
+            default_abi = ['none']
+            default_arch = ['any']
+
+        self.pyver = tags.get('pyver', default_pyver)
+        self.abi = tags.get('abi', default_abi)
+        self.arch = tags.get('arch', default_arch)
+
+        libdir = paths[libkey]
+
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        archive_paths = []
+
+        # First, stuff which is not in site-packages
+        for key in ('data', 'headers', 'scripts'):
+            if key not in paths:
+                continue
+            path = paths[key]
+            if os.path.isdir(path):
+                for root, dirs, files in os.walk(path):
+                    for fn in files:
+                        p = fsdecode(os.path.join(root, fn))
+                        rp = os.path.relpath(p, path)
+                        ap = to_posix(os.path.join(data_dir, key, rp))
+                        archive_paths.append((ap, p))
+                        if key == 'scripts' and not p.endswith('.exe'):
+                            with open(p, 'rb') as f:
+                                data = f.read()
+                            data = self.process_shebang(data)
+                            with open(p, 'wb') as f:
+                                f.write(data)
+
+        # Now, stuff which is in site-packages, other than the
+        # distinfo stuff.
+        path = libdir
+        distinfo = None
+        for root, dirs, files in os.walk(path):
+            if root == path:
+                # At the top level only, save distinfo for later
+                # and skip it for now
+                for i, dn in enumerate(dirs):
+                    dn = fsdecode(dn)
+                    if dn.endswith('.dist-info'):
+                        distinfo = os.path.join(root, dn)
+                        del dirs[i]
+                        break
+                assert distinfo, '.dist-info directory expected, not found'
+
+            for fn in files:
+                # comment out next suite to leave .pyc files in
+                if fsdecode(fn).endswith(('.pyc', '.pyo')):
+                    continue
+                p = os.path.join(root, fn)
+                rp = to_posix(os.path.relpath(p, path))
+                archive_paths.append((rp, p))
+
+        # Now distinfo. Assumed to be flat, i.e. os.listdir is enough.
+        files = os.listdir(distinfo)
+        for fn in files:
+            if fn not in ('RECORD', 'INSTALLER', 'SHARED', 'WHEEL'):
+                p = fsdecode(os.path.join(distinfo, fn))
+                ap = to_posix(os.path.join(info_dir, fn))
+                archive_paths.append((ap, p))
+
+        wheel_metadata = [
+            'Wheel-Version: %d.%d' % (wheel_version or self.wheel_version),
+            'Generator: distlib %s' % __version__,
+            'Root-Is-Purelib: %s' % is_pure,
+        ]
+        for pyver, abi, arch in self.tags:
+            wheel_metadata.append('Tag: %s-%s-%s' % (pyver, abi, arch))
+        p = os.path.join(distinfo, 'WHEEL')
+        with open(p, 'w') as f:
+            f.write('\n'.join(wheel_metadata))
+        ap = to_posix(os.path.join(info_dir, 'WHEEL'))
+        archive_paths.append((ap, p))
+
+        # sort the entries by archive path. Not needed by any spec, but it
+        # keeps the archive listing and RECORD tidier than they would otherwise
+        # be. Use the number of path segments to keep directory entries together,
+        # and keep the dist-info stuff at the end.
+        def sorter(t):
+            ap = t[0]
+            n = ap.count('/')
+            if '.dist-info' in ap:
+                n += 10000
+            return (n, ap)
+        archive_paths = sorted(archive_paths, key=sorter)
+
+        # Now, at last, RECORD.
+        # Paths in here are archive paths - nothing else makes sense.
+        self.write_records((distinfo, info_dir), libdir, archive_paths)
+        # Now, ready to build the zip file
+        pathname = os.path.join(self.dirname, self.filename)
+        self.build_zip(pathname, archive_paths)
+        return pathname
+
+    def skip_entry(self, arcname):
+        """
+        Determine whether an archive entry should be skipped when verifying
+        or installing.
+        """
+        # The signature file won't be in RECORD,
+        # and we  don't currently don't do anything with it
+        # We also skip directories, as they won't be in RECORD
+        # either. See:
+        #
+        # https://github.com/pypa/wheel/issues/294
+        # https://github.com/pypa/wheel/issues/287
+        # https://github.com/pypa/wheel/pull/289
+        #
+        return arcname.endswith(('/', '/RECORD.jws'))
+
+    def install(self, paths, maker, **kwargs):
+        """
+        Install a wheel to the specified paths. If kwarg ``warner`` is
+        specified, it should be a callable, which will be called with two
+        tuples indicating the wheel version of this software and the wheel
+        version in the file, if there is a discrepancy in the versions.
+        This can be used to issue any warnings to raise any exceptions.
+        If kwarg ``lib_only`` is True, only the purelib/platlib files are
+        installed, and the headers, scripts, data and dist-info metadata are
+        not written. If kwarg ``bytecode_hashed_invalidation`` is True, written
+        bytecode will try to use file-hash based invalidation (PEP-552) on
+        supported interpreter versions (CPython 2.7+).
+
+        The return value is a :class:`InstalledDistribution` instance unless
+        ``options.lib_only`` is True, in which case the return value is ``None``.
+        """
+
+        dry_run = maker.dry_run
+        warner = kwargs.get('warner')
+        lib_only = kwargs.get('lib_only', False)
+        bc_hashed_invalidation = kwargs.get('bytecode_hashed_invalidation', False)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, LEGACY_METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            if (file_version != self.wheel_version) and warner:
+                warner(self.wheel_version, file_version)
+
+            if message['Root-Is-Purelib'] == 'true':
+                libdir = paths['purelib']
+            else:
+                libdir = paths['platlib']
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            data_pfx = posixpath.join(data_dir, '')
+            info_pfx = posixpath.join(info_dir, '')
+            script_pfx = posixpath.join(data_dir, 'scripts', '')
+
+            # make a new instance rather than a copy of maker's,
+            # as we mutate it
+            fileop = FileOperator(dry_run=dry_run)
+            fileop.record = True    # so we can rollback if needed
+
+            bc = not sys.dont_write_bytecode    # Double negatives. Lovely!
+
+            outfiles = []   # for RECORD writing
+
+            # for script copying/shebang processing
+            workdir = tempfile.mkdtemp()
+            # set target dir later
+            # we default add_launchers to False, as the
+            # Python Launcher should be used instead
+            maker.source_dir = workdir
+            maker.target_dir = None
+            try:
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if self.skip_entry(u_arcname):
+                        continue
+                    row = records[u_arcname]
+                    if row[2] and str(zinfo.file_size) != row[2]:
+                        raise DistlibException('size mismatch for '
+                                               '%s' % u_arcname)
+                    if row[1]:
+                        kind, value = row[1].split('=', 1)
+                        with zf.open(arcname) as bf:
+                            data = bf.read()
+                        _, digest = self.get_hash(data, kind)
+                        if digest != value:
+                            raise DistlibException('digest mismatch for '
+                                                   '%s' % arcname)
+
+                    if lib_only and u_arcname.startswith((info_pfx, data_pfx)):
+                        logger.debug('lib_only: skipping %s', u_arcname)
+                        continue
+                    is_script = (u_arcname.startswith(script_pfx)
+                                 and not u_arcname.endswith('.exe'))
+
+                    if u_arcname.startswith(data_pfx):
+                        _, where, rp = u_arcname.split('/', 2)
+                        outfile = os.path.join(paths[where], convert_path(rp))
+                    else:
+                        # meant for site-packages.
+                        if u_arcname in (wheel_metadata_name, record_name):
+                            continue
+                        outfile = os.path.join(libdir, convert_path(u_arcname))
+                    if not is_script:
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, outfile)
+                        # Issue #147: permission bits aren't preserved. Using
+                        # zf.extract(zinfo, libdir) should have worked, but didn't,
+                        # see https://www.thetopsites.net/article/53834422.shtml
+                        # So ... manually preserve permission bits as given in zinfo
+                        if os.name == 'posix':
+                            # just set the normal permission bits
+                            os.chmod(outfile, (zinfo.external_attr >> 16) & 0x1FF)
+                        outfiles.append(outfile)
+                        # Double check the digest of the written file
+                        if not dry_run and row[1]:
+                            with open(outfile, 'rb') as bf:
+                                data = bf.read()
+                                _, newdigest = self.get_hash(data, kind)
+                                if newdigest != digest:
+                                    raise DistlibException('digest mismatch '
+                                                           'on write for '
+                                                           '%s' % outfile)
+                        if bc and outfile.endswith('.py'):
+                            try:
+                                pyc = fileop.byte_compile(outfile,
+                                                          hashed_invalidation=bc_hashed_invalidation)
+                                outfiles.append(pyc)
+                            except Exception:
+                                # Don't give up if byte-compilation fails,
+                                # but log it and perhaps warn the user
+                                logger.warning('Byte-compilation failed',
+                                               exc_info=True)
+                    else:
+                        fn = os.path.basename(convert_path(arcname))
+                        workname = os.path.join(workdir, fn)
+                        with zf.open(arcname) as bf:
+                            fileop.copy_stream(bf, workname)
+
+                        dn, fn = os.path.split(outfile)
+                        maker.target_dir = dn
+                        filenames = maker.make(fn)
+                        fileop.set_executable_mode(filenames)
+                        outfiles.extend(filenames)
+
+                if lib_only:
+                    logger.debug('lib_only: returning None')
+                    dist = None
+                else:
+                    # Generate scripts
+
+                    # Try to get pydist.json so we can see if there are
+                    # any commands to generate. If this fails (e.g. because
+                    # of a legacy wheel), log a warning but don't give up.
+                    commands = None
+                    file_version = self.info['Wheel-Version']
+                    if file_version == '1.0':
+                        # Use legacy info
+                        ep = posixpath.join(info_dir, 'entry_points.txt')
+                        try:
+                            with zf.open(ep) as bwf:
+                                epdata = read_exports(bwf)
+                            commands = {}
+                            for key in ('console', 'gui'):
+                                k = '%s_scripts' % key
+                                if k in epdata:
+                                    commands['wrap_%s' % key] = d = {}
+                                    for v in epdata[k].values():
+                                        s = '%s:%s' % (v.prefix, v.suffix)
+                                        if v.flags:
+                                            s += ' [%s]' % ','.join(v.flags)
+                                        d[v.name] = s
+                        except Exception:
+                            logger.warning('Unable to read legacy script '
+                                           'metadata, so cannot generate '
+                                           'scripts')
+                    else:
+                        try:
+                            with zf.open(metadata_name) as bwf:
+                                wf = wrapper(bwf)
+                                commands = json.load(wf).get('extensions')
+                                if commands:
+                                    commands = commands.get('python.commands')
+                        except Exception:
+                            logger.warning('Unable to read JSON metadata, so '
+                                           'cannot generate scripts')
+                    if commands:
+                        console_scripts = commands.get('wrap_console', {})
+                        gui_scripts = commands.get('wrap_gui', {})
+                        if console_scripts or gui_scripts:
+                            script_dir = paths.get('scripts', '')
+                            if not os.path.isdir(script_dir):
+                                raise ValueError('Valid script path not '
+                                                 'specified')
+                            maker.target_dir = script_dir
+                            for k, v in console_scripts.items():
+                                script = '%s = %s' % (k, v)
+                                filenames = maker.make(script)
+                                fileop.set_executable_mode(filenames)
+
+                            if gui_scripts:
+                                options = {'gui': True }
+                                for k, v in gui_scripts.items():
+                                    script = '%s = %s' % (k, v)
+                                    filenames = maker.make(script, options)
+                                    fileop.set_executable_mode(filenames)
+
+                    p = os.path.join(libdir, info_dir)
+                    dist = InstalledDistribution(p)
+
+                    # Write SHARED
+                    paths = dict(paths)     # don't change passed in dict
+                    del paths['purelib']
+                    del paths['platlib']
+                    paths['lib'] = libdir
+                    p = dist.write_shared_locations(paths, dry_run)
+                    if p:
+                        outfiles.append(p)
+
+                    # Write RECORD
+                    dist.write_installed_files(outfiles, paths['prefix'],
+                                               dry_run)
+                return dist
+            except Exception:  # pragma: no cover
+                logger.exception('installation failed.')
+                fileop.rollback()
+                raise
+            finally:
+                shutil.rmtree(workdir)
+
+    def _get_dylib_cache(self):
+        global cache
+        if cache is None:
+            # Use native string to avoid issues on 2.x: see Python #20140.
+            base = os.path.join(get_cache_base(), str('dylib-cache'),
+                                '%s.%s' % sys.version_info[:2])
+            cache = Cache(base)
+        return cache
+
+    def _get_extensions(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        arcname = posixpath.join(info_dir, 'EXTENSIONS')
+        wrapper = codecs.getreader('utf-8')
+        result = []
+        with ZipFile(pathname, 'r') as zf:
+            try:
+                with zf.open(arcname) as bf:
+                    wf = wrapper(bf)
+                    extensions = json.load(wf)
+                    cache = self._get_dylib_cache()
+                    prefix = cache.prefix_to_dir(pathname)
+                    cache_base = os.path.join(cache.base, prefix)
+                    if not os.path.isdir(cache_base):
+                        os.makedirs(cache_base)
+                    for name, relpath in extensions.items():
+                        dest = os.path.join(cache_base, convert_path(relpath))
+                        if not os.path.exists(dest):
+                            extract = True
+                        else:
+                            file_time = os.stat(dest).st_mtime
+                            file_time = datetime.datetime.fromtimestamp(file_time)
+                            info = zf.getinfo(relpath)
+                            wheel_time = datetime.datetime(*info.date_time)
+                            extract = wheel_time > file_time
+                        if extract:
+                            zf.extract(relpath, cache_base)
+                        result.append((name, dest))
+            except KeyError:
+                pass
+        return result
+
+    def is_compatible(self):
+        """
+        Determine if a wheel is compatible with the running system.
+        """
+        return is_compatible(self)
+
+    def is_mountable(self):
+        """
+        Determine if a wheel is asserted as mountable by its metadata.
+        """
+        return True # for now - metadata details TBD
+
+    def mount(self, append=False):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if not self.is_compatible():
+            msg = 'Wheel %s not compatible with this Python.' % pathname
+            raise DistlibException(msg)
+        if not self.is_mountable():
+            msg = 'Wheel %s is marked as not mountable.' % pathname
+            raise DistlibException(msg)
+        if pathname in sys.path:
+            logger.debug('%s already in path', pathname)
+        else:
+            if append:
+                sys.path.append(pathname)
+            else:
+                sys.path.insert(0, pathname)
+            extensions = self._get_extensions()
+            if extensions:
+                if _hook not in sys.meta_path:
+                    sys.meta_path.append(_hook)
+                _hook.add(pathname, extensions)
+
+    def unmount(self):
+        pathname = os.path.abspath(os.path.join(self.dirname, self.filename))
+        if pathname not in sys.path:
+            logger.debug('%s not in path', pathname)
+        else:
+            sys.path.remove(pathname)
+            if pathname in _hook.impure_wheels:
+                _hook.remove(pathname)
+            if not _hook.impure_wheels:
+                if _hook in sys.meta_path:
+                    sys.meta_path.remove(_hook)
+
+    def verify(self):
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        data_dir = '%s.data' % name_ver
+        info_dir = '%s.dist-info' % name_ver
+
+        metadata_name = posixpath.join(info_dir, LEGACY_METADATA_FILENAME)
+        wheel_metadata_name = posixpath.join(info_dir, 'WHEEL')
+        record_name = posixpath.join(info_dir, 'RECORD')
+
+        wrapper = codecs.getreader('utf-8')
+
+        with ZipFile(pathname, 'r') as zf:
+            with zf.open(wheel_metadata_name) as bwf:
+                wf = wrapper(bwf)
+                message = message_from_file(wf)
+            wv = message['Wheel-Version'].split('.', 1)
+            file_version = tuple([int(i) for i in wv])
+            # TODO version verification
+
+            records = {}
+            with zf.open(record_name) as bf:
+                with CSVReader(stream=bf) as reader:
+                    for row in reader:
+                        p = row[0]
+                        records[p] = row
+
+            for zinfo in zf.infolist():
+                arcname = zinfo.filename
+                if isinstance(arcname, text_type):
+                    u_arcname = arcname
+                else:
+                    u_arcname = arcname.decode('utf-8')
+                # See issue #115: some wheels have .. in their entries, but
+                # in the filename ... e.g. __main__..py ! So the check is
+                # updated to look for .. in the directory portions
+                p = u_arcname.split('/')
+                if '..' in p:
+                    raise DistlibException('invalid entry in '
+                                           'wheel: %r' % u_arcname)
+
+                if self.skip_entry(u_arcname):
+                    continue
+                row = records[u_arcname]
+                if row[2] and str(zinfo.file_size) != row[2]:
+                    raise DistlibException('size mismatch for '
+                                           '%s' % u_arcname)
+                if row[1]:
+                    kind, value = row[1].split('=', 1)
+                    with zf.open(arcname) as bf:
+                        data = bf.read()
+                    _, digest = self.get_hash(data, kind)
+                    if digest != value:
+                        raise DistlibException('digest mismatch for '
+                                               '%s' % arcname)
+
+    def update(self, modifier, dest_dir=None, **kwargs):
+        """
+        Update the contents of a wheel in a generic way. The modifier should
+        be a callable which expects a dictionary argument: its keys are
+        archive-entry paths, and its values are absolute filesystem paths
+        where the contents the corresponding archive entries can be found. The
+        modifier is free to change the contents of the files pointed to, add
+        new entries and remove entries, before returning. This method will
+        extract the entire contents of the wheel to a temporary location, call
+        the modifier, and then use the passed (and possibly updated)
+        dictionary to write a new wheel. If ``dest_dir`` is specified, the new
+        wheel is written there -- otherwise, the original wheel is overwritten.
+
+        The modifier should return True if it updated the wheel, else False.
+        This method returns the same value the modifier returns.
+        """
+
+        def get_version(path_map, info_dir):
+            version = path = None
+            key = '%s/%s' % (info_dir, LEGACY_METADATA_FILENAME)
+            if key not in path_map:
+                key = '%s/PKG-INFO' % info_dir
+            if key in path_map:
+                path = path_map[key]
+                version = Metadata(path=path).version
+            return version, path
+
+        def update_version(version, path):
+            updated = None
+            try:
+                v = NormalizedVersion(version)
+                i = version.find('-')
+                if i < 0:
+                    updated = '%s+1' % version
+                else:
+                    parts = [int(s) for s in version[i + 1:].split('.')]
+                    parts[-1] += 1
+                    updated = '%s+%s' % (version[:i],
+                                         '.'.join(str(i) for i in parts))
+            except UnsupportedVersionError:
+                logger.debug('Cannot update non-compliant (PEP-440) '
+                             'version %r', version)
+            if updated:
+                md = Metadata(path=path)
+                md.version = updated
+                legacy = path.endswith(LEGACY_METADATA_FILENAME)
+                md.write(path=path, legacy=legacy)
+                logger.debug('Version updated from %r to %r', version,
+                             updated)
+
+        pathname = os.path.join(self.dirname, self.filename)
+        name_ver = '%s-%s' % (self.name, self.version)
+        info_dir = '%s.dist-info' % name_ver
+        record_name = posixpath.join(info_dir, 'RECORD')
+        with tempdir() as workdir:
+            with ZipFile(pathname, 'r') as zf:
+                path_map = {}
+                for zinfo in zf.infolist():
+                    arcname = zinfo.filename
+                    if isinstance(arcname, text_type):
+                        u_arcname = arcname
+                    else:
+                        u_arcname = arcname.decode('utf-8')
+                    if u_arcname == record_name:
+                        continue
+                    if '..' in u_arcname:
+                        raise DistlibException('invalid entry in '
+                                               'wheel: %r' % u_arcname)
+                    zf.extract(zinfo, workdir)
+                    path = os.path.join(workdir, convert_path(u_arcname))
+                    path_map[u_arcname] = path
+
+            # Remember the version.
+            original_version, _ = get_version(path_map, info_dir)
+            # Files extracted. Call the modifier.
+            modified = modifier(path_map, **kwargs)
+            if modified:
+                # Something changed - need to build a new wheel.
+                current_version, path = get_version(path_map, info_dir)
+                if current_version and (current_version == original_version):
+                    # Add or update local version to signify changes.
+                    update_version(current_version, path)
+                # Decide where the new wheel goes.
+                if dest_dir is None:
+                    fd, newpath = tempfile.mkstemp(suffix='.whl',
+                                                   prefix='wheel-update-',
+                                                   dir=workdir)
+                    os.close(fd)
+                else:
+                    if not os.path.isdir(dest_dir):
+                        raise DistlibException('Not a directory: %r' % dest_dir)
+                    newpath = os.path.join(dest_dir, self.filename)
+                archive_paths = list(path_map.items())
+                distinfo = os.path.join(workdir, info_dir)
+                info = distinfo, info_dir
+                self.write_records(info, workdir, archive_paths)
+                self.build_zip(newpath, archive_paths)
+                if dest_dir is None:
+                    shutil.copyfile(newpath, pathname)
+        return modified
+
+def _get_glibc_version():
+    import platform
+    ver = platform.libc_ver()
+    result = []
+    if ver[0] == 'glibc':
+        for s in ver[1].split('.'):
+            result.append(int(s) if s.isdigit() else 0)
+        result = tuple(result)
+    return result
+
+def compatible_tags():
+    """
+    Return (pyver, abi, arch) tuples compatible with this Python.
+    """
+    versions = [VER_SUFFIX]
+    major = VER_SUFFIX[0]
+    for minor in range(sys.version_info[1] - 1, - 1, -1):
+        versions.append(''.join([major, str(minor)]))
+
+    abis = []
+    for suffix in _get_suffixes():
+        if suffix.startswith('.abi'):
+            abis.append(suffix.split('.', 2)[1])
+    abis.sort()
+    if ABI != 'none':
+        abis.insert(0, ABI)
+    abis.append('none')
+    result = []
+
+    arches = [ARCH]
+    if sys.platform == 'darwin':
+        m = re.match(r'(\w+)_(\d+)_(\d+)_(\w+)$', ARCH)
+        if m:
+            name, major, minor, arch = m.groups()
+            minor = int(minor)
+            matches = [arch]
+            if arch in ('i386', 'ppc'):
+                matches.append('fat')
+            if arch in ('i386', 'ppc', 'x86_64'):
+                matches.append('fat3')
+            if arch in ('ppc64', 'x86_64'):
+                matches.append('fat64')
+            if arch in ('i386', 'x86_64'):
+                matches.append('intel')
+            if arch in ('i386', 'x86_64', 'intel', 'ppc', 'ppc64'):
+                matches.append('universal')
+            while minor >= 0:
+                for match in matches:
+                    s = '%s_%s_%s_%s' % (name, major, minor, match)
+                    if s != ARCH:   # already there
+                        arches.append(s)
+                minor -= 1
+
+    # Most specific - our Python version, ABI and arch
+    for abi in abis:
+        for arch in arches:
+            result.append((''.join((IMP_PREFIX, versions[0])), abi, arch))
+            # manylinux
+            if abi != 'none' and sys.platform.startswith('linux'):
+                arch = arch.replace('linux_', '')
+                parts = _get_glibc_version()
+                if len(parts) == 2:
+                    if parts >= (2, 5):
+                        result.append((''.join((IMP_PREFIX, versions[0])), abi,
+                                       'manylinux1_%s' % arch))
+                    if parts >= (2, 12):
+                        result.append((''.join((IMP_PREFIX, versions[0])), abi,
+                                       'manylinux2010_%s' % arch))
+                    if parts >= (2, 17):
+                        result.append((''.join((IMP_PREFIX, versions[0])), abi,
+                                       'manylinux2014_%s' % arch))
+                    result.append((''.join((IMP_PREFIX, versions[0])), abi,
+                                   'manylinux_%s_%s_%s' % (parts[0], parts[1],
+                                                           arch)))
+
+    # where no ABI / arch dependency, but IMP_PREFIX dependency
+    for i, version in enumerate(versions):
+        result.append((''.join((IMP_PREFIX, version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join((IMP_PREFIX, version[0])), 'none', 'any'))
+
+    # no IMP_PREFIX, ABI or arch dependency
+    for i, version in enumerate(versions):
+        result.append((''.join(('py', version)), 'none', 'any'))
+        if i == 0:
+            result.append((''.join(('py', version[0])), 'none', 'any'))
+
+    return set(result)
+
+
+COMPATIBLE_TAGS = compatible_tags()
+
+del compatible_tags
+
+
+def is_compatible(wheel, tags=None):
+    if not isinstance(wheel, Wheel):
+        wheel = Wheel(wheel)    # assume it's a filename
+    result = False
+    if tags is None:
+        tags = COMPATIBLE_TAGS
+    for ver, abi, arch in tags:
+        if ver in wheel.pyver and abi in wheel.abi and arch in wheel.arch:
+            result = True
+            break
+    return result
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distro/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__init__.py
new file mode 100644
index 0000000..7686fe8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__init__.py
@@ -0,0 +1,54 @@
+from .distro import (
+    NORMALIZED_DISTRO_ID,
+    NORMALIZED_LSB_ID,
+    NORMALIZED_OS_ID,
+    LinuxDistribution,
+    __version__,
+    build_number,
+    codename,
+    distro_release_attr,
+    distro_release_info,
+    id,
+    info,
+    like,
+    linux_distribution,
+    lsb_release_attr,
+    lsb_release_info,
+    major_version,
+    minor_version,
+    name,
+    os_release_attr,
+    os_release_info,
+    uname_attr,
+    uname_info,
+    version,
+    version_parts,
+)
+
+__all__ = [
+    "NORMALIZED_DISTRO_ID",
+    "NORMALIZED_LSB_ID",
+    "NORMALIZED_OS_ID",
+    "LinuxDistribution",
+    "build_number",
+    "codename",
+    "distro_release_attr",
+    "distro_release_info",
+    "id",
+    "info",
+    "like",
+    "linux_distribution",
+    "lsb_release_attr",
+    "lsb_release_info",
+    "major_version",
+    "minor_version",
+    "name",
+    "os_release_attr",
+    "os_release_info",
+    "uname_attr",
+    "uname_info",
+    "version",
+    "version_parts",
+]
+
+__version__ = __version__
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distro/__main__.py b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__main__.py
new file mode 100644
index 0000000..0c01d5b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__main__.py
@@ -0,0 +1,4 @@
+from .distro import main
+
+if __name__ == "__main__":
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distro/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distro/__pycache__/distro.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/distro/__pycache__/distro.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/distro/distro.py b/venv/lib/python3.9/site-packages/pip/_vendor/distro/distro.py
new file mode 100644
index 0000000..49066ae
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/distro/distro.py
@@ -0,0 +1,1374 @@
+#!/usr/bin/env python
+# Copyright 2015,2016,2017 Nir Cohen
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+The ``distro`` package (``distro`` stands for Linux Distribution) provides
+information about the Linux distribution it runs on, such as a reliable
+machine-readable distro ID, or version information.
+
+It is the recommended replacement for Python's original
+:py:func:`platform.linux_distribution` function, but it provides much more
+functionality. An alternative implementation became necessary because Python
+3.5 deprecated this function, and Python 3.8 removed it altogether. Its
+predecessor function :py:func:`platform.dist` was already deprecated since
+Python 2.6 and removed in Python 3.8. Still, there are many cases in which
+access to OS distribution information is needed. See `Python issue 1322
+<https://bugs.python.org/issue1322>`_ for more information.
+"""
+
+import argparse
+import json
+import logging
+import os
+import re
+import shlex
+import subprocess
+import sys
+import warnings
+from typing import (
+    Any,
+    Callable,
+    Dict,
+    Iterable,
+    Optional,
+    Sequence,
+    TextIO,
+    Tuple,
+    Type,
+)
+
+try:
+    from typing import TypedDict
+except ImportError:
+    # Python 3.7
+    TypedDict = dict
+
+__version__ = "1.7.0"
+
+
+class VersionDict(TypedDict):
+    major: str
+    minor: str
+    build_number: str
+
+
+class InfoDict(TypedDict):
+    id: str
+    version: str
+    version_parts: VersionDict
+    like: str
+    codename: str
+
+
+_UNIXCONFDIR = os.environ.get("UNIXCONFDIR", "/etc")
+_UNIXUSRLIBDIR = os.environ.get("UNIXUSRLIBDIR", "/usr/lib")
+_OS_RELEASE_BASENAME = "os-release"
+
+#: Translation table for normalizing the "ID" attribute defined in os-release
+#: files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as defined in the os-release file, translated to lower case,
+#:   with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_OS_ID = {
+    "ol": "oracle",  # Oracle Linux
+    "opensuse-leap": "opensuse",  # Newer versions of OpenSuSE report as opensuse-leap
+}
+
+#: Translation table for normalizing the "Distributor ID" attribute returned by
+#: the lsb_release command, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as returned by the lsb_release command, translated to lower
+#:   case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_LSB_ID = {
+    "enterpriseenterpriseas": "oracle",  # Oracle Enterprise Linux 4
+    "enterpriseenterpriseserver": "oracle",  # Oracle Linux 5
+    "redhatenterpriseworkstation": "rhel",  # RHEL 6, 7 Workstation
+    "redhatenterpriseserver": "rhel",  # RHEL 6, 7 Server
+    "redhatenterprisecomputenode": "rhel",  # RHEL 6 ComputeNode
+}
+
+#: Translation table for normalizing the distro ID derived from the file name
+#: of distro release files, for use by the :func:`distro.id` method.
+#:
+#: * Key: Value as derived from the file name of a distro release file,
+#:   translated to lower case, with blanks translated to underscores.
+#:
+#: * Value: Normalized value.
+NORMALIZED_DISTRO_ID = {
+    "redhat": "rhel",  # RHEL 6.x, 7.x
+}
+
+# Pattern for content of distro release file (reversed)
+_DISTRO_RELEASE_CONTENT_REVERSED_PATTERN = re.compile(
+    r"(?:[^)]*\)(.*)\()? *(?:STL )?([\d.+\-a-z]*\d) *(?:esaeler *)?(.+)"
+)
+
+# Pattern for base file name of distro release file
+_DISTRO_RELEASE_BASENAME_PATTERN = re.compile(r"(\w+)[-_](release|version)$")
+
+# Base file names to be ignored when searching for distro release file
+_DISTRO_RELEASE_IGNORE_BASENAMES = (
+    "debian_version",
+    "lsb-release",
+    "oem-release",
+    _OS_RELEASE_BASENAME,
+    "system-release",
+    "plesk-release",
+    "iredmail-release",
+)
+
+
+def linux_distribution(full_distribution_name: bool = True) -> Tuple[str, str, str]:
+    """
+    .. deprecated:: 1.6.0
+
+        :func:`distro.linux_distribution()` is deprecated. It should only be
+        used as a compatibility shim with Python's
+        :py:func:`platform.linux_distribution()`. Please use :func:`distro.id`,
+        :func:`distro.version` and :func:`distro.name` instead.
+
+    Return information about the current OS distribution as a tuple
+    ``(id_name, version, codename)`` with items as follows:
+
+    * ``id_name``:  If *full_distribution_name* is false, the result of
+      :func:`distro.id`. Otherwise, the result of :func:`distro.name`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``codename``:  The extra item (usually in parentheses) after the
+      os-release version number, or the result of :func:`distro.codename`.
+
+    The interface of this function is compatible with the original
+    :py:func:`platform.linux_distribution` function, supporting a subset of
+    its parameters.
+
+    The data it returns may not exactly be the same, because it uses more data
+    sources than the original function, and that may lead to different data if
+    the OS distribution is not consistent across multiple data sources it
+    provides (there are indeed such distributions ...).
+
+    Another reason for differences is the fact that the :func:`distro.id`
+    method normalizes the distro ID string to a reliable machine-readable value
+    for a number of popular OS distributions.
+    """
+    warnings.warn(
+        "distro.linux_distribution() is deprecated. It should only be used as a "
+        "compatibility shim with Python's platform.linux_distribution(). Please use "
+        "distro.id(), distro.version() and distro.name() instead.",
+        DeprecationWarning,
+        stacklevel=2,
+    )
+    return _distro.linux_distribution(full_distribution_name)
+
+
+def id() -> str:
+    """
+    Return the distro ID of the current distribution, as a
+    machine-readable string.
+
+    For a number of OS distributions, the returned distro ID value is
+    *reliable*, in the sense that it is documented and that it does not change
+    across releases of the distribution.
+
+    This package maintains the following reliable distro ID values:
+
+    ==============  =========================================
+    Distro ID       Distribution
+    ==============  =========================================
+    "ubuntu"        Ubuntu
+    "debian"        Debian
+    "rhel"          RedHat Enterprise Linux
+    "centos"        CentOS
+    "fedora"        Fedora
+    "sles"          SUSE Linux Enterprise Server
+    "opensuse"      openSUSE
+    "amzn"          Amazon Linux
+    "arch"          Arch Linux
+    "cloudlinux"    CloudLinux OS
+    "exherbo"       Exherbo Linux
+    "gentoo"        GenToo Linux
+    "ibm_powerkvm"  IBM PowerKVM
+    "kvmibm"        KVM for IBM z Systems
+    "linuxmint"     Linux Mint
+    "mageia"        Mageia
+    "mandriva"      Mandriva Linux
+    "parallels"     Parallels
+    "pidora"        Pidora
+    "raspbian"      Raspbian
+    "oracle"        Oracle Linux (and Oracle Enterprise Linux)
+    "scientific"    Scientific Linux
+    "slackware"     Slackware
+    "xenserver"     XenServer
+    "openbsd"       OpenBSD
+    "netbsd"        NetBSD
+    "freebsd"       FreeBSD
+    "midnightbsd"   MidnightBSD
+    "rocky"         Rocky Linux
+    "aix"           AIX
+    ==============  =========================================
+
+    If you have a need to get distros for reliable IDs added into this set,
+    or if you find that the :func:`distro.id` function returns a different
+    distro ID for one of the listed distros, please create an issue in the
+    `distro issue tracker`_.
+
+    **Lookup hierarchy and transformations:**
+
+    First, the ID is obtained from the following sources, in the specified
+    order. The first available and non-empty value is used:
+
+    * the value of the "ID" attribute of the os-release file,
+
+    * the value of the "Distributor ID" attribute returned by the lsb_release
+      command,
+
+    * the first part of the file name of the distro release file,
+
+    The so determined ID value then passes the following transformations,
+    before it is returned by this method:
+
+    * it is translated to lower case,
+
+    * blanks (which should not be there anyway) are translated to underscores,
+
+    * a normalization of the ID is performed, based upon
+      `normalization tables`_. The purpose of this normalization is to ensure
+      that the ID is as reliable as possible, even across incompatible changes
+      in the OS distributions. A common reason for an incompatible change is
+      the addition of an os-release file, or the addition of the lsb_release
+      command, with ID values that differ from what was previously determined
+      from the distro release file name.
+    """
+    return _distro.id()
+
+
+def name(pretty: bool = False) -> str:
+    """
+    Return the name of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the name is returned without version or codename.
+    (e.g. "CentOS Linux")
+
+    If *pretty* is true, the version and codename are appended.
+    (e.g. "CentOS Linux 7.1.1503 (Core)")
+
+    **Lookup hierarchy:**
+
+    The name is obtained from the following sources, in the specified order.
+    The first available and non-empty value is used:
+
+    * If *pretty* is false:
+
+      - the value of the "NAME" attribute of the os-release file,
+
+      - the value of the "Distributor ID" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file.
+
+    * If *pretty* is true:
+
+      - the value of the "PRETTY_NAME" attribute of the os-release file,
+
+      - the value of the "Description" attribute returned by the lsb_release
+        command,
+
+      - the value of the "<name>" field of the distro release file, appended
+        with the value of the pretty version ("<version_id>" and "<codename>"
+        fields) of the distro release file, if available.
+    """
+    return _distro.name(pretty)
+
+
+def version(pretty: bool = False, best: bool = False) -> str:
+    """
+    Return the version of the current OS distribution, as a human-readable
+    string.
+
+    If *pretty* is false, the version is returned without codename (e.g.
+    "7.0").
+
+    If *pretty* is true, the codename in parenthesis is appended, if the
+    codename is non-empty (e.g. "7.0 (Maipo)").
+
+    Some distributions provide version numbers with different precisions in
+    the different sources of distribution information. Examining the different
+    sources in a fixed priority order does not always yield the most precise
+    version (e.g. for Debian 8.2, or CentOS 7.1).
+
+    Some other distributions may not provide this kind of information. In these
+    cases, an empty string would be returned. This behavior can be observed
+    with rolling releases distributions (e.g. Arch Linux).
+
+    The *best* parameter can be used to control the approach for the returned
+    version:
+
+    If *best* is false, the first non-empty version number in priority order of
+    the examined sources is returned.
+
+    If *best* is true, the most precise version number out of all examined
+    sources is returned.
+
+    **Lookup hierarchy:**
+
+    In all cases, the version number is obtained from the following sources.
+    If *best* is false, this order represents the priority order:
+
+    * the value of the "VERSION_ID" attribute of the os-release file,
+    * the value of the "Release" attribute returned by the lsb_release
+      command,
+    * the version number parsed from the "<version_id>" field of the first line
+      of the distro release file,
+    * the version number parsed from the "PRETTY_NAME" attribute of the
+      os-release file, if it follows the format of the distro release files.
+    * the version number parsed from the "Description" attribute returned by
+      the lsb_release command, if it follows the format of the distro release
+      files.
+    """
+    return _distro.version(pretty, best)
+
+
+def version_parts(best: bool = False) -> Tuple[str, str, str]:
+    """
+    Return the version of the current OS distribution as a tuple
+    ``(major, minor, build_number)`` with items as follows:
+
+    * ``major``:  The result of :func:`distro.major_version`.
+
+    * ``minor``:  The result of :func:`distro.minor_version`.
+
+    * ``build_number``:  The result of :func:`distro.build_number`.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.version_parts(best)
+
+
+def major_version(best: bool = False) -> str:
+    """
+    Return the major version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The major version is the first
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.major_version(best)
+
+
+def minor_version(best: bool = False) -> str:
+    """
+    Return the minor version of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The minor version is the second
+    part of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.minor_version(best)
+
+
+def build_number(best: bool = False) -> str:
+    """
+    Return the build number of the current OS distribution, as a string,
+    if provided.
+    Otherwise, the empty string is returned. The build number is the third part
+    of the dot-separated version string.
+
+    For a description of the *best* parameter, see the :func:`distro.version`
+    method.
+    """
+    return _distro.build_number(best)
+
+
+def like() -> str:
+    """
+    Return a space-separated list of distro IDs of distributions that are
+    closely related to the current OS distribution in regards to packaging
+    and programming interfaces, for example distributions the current
+    distribution is a derivative from.
+
+    **Lookup hierarchy:**
+
+    This information item is only provided by the os-release file.
+    For details, see the description of the "ID_LIKE" attribute in the
+    `os-release man page
+    <http://www.freedesktop.org/software/systemd/man/os-release.html>`_.
+    """
+    return _distro.like()
+
+
+def codename() -> str:
+    """
+    Return the codename for the release of the current OS distribution,
+    as a string.
+
+    If the distribution does not have a codename, an empty string is returned.
+
+    Note that the returned codename is not always really a codename. For
+    example, openSUSE returns "x86_64". This function does not handle such
+    cases in any special way and just returns the string it finds, if any.
+
+    **Lookup hierarchy:**
+
+    * the codename within the "VERSION" attribute of the os-release file, if
+      provided,
+
+    * the value of the "Codename" attribute returned by the lsb_release
+      command,
+
+    * the value of the "<codename>" field of the distro release file.
+    """
+    return _distro.codename()
+
+
+def info(pretty: bool = False, best: bool = False) -> InfoDict:
+    """
+    Return certain machine-readable information items about the current OS
+    distribution in a dictionary, as shown in the following example:
+
+    .. sourcecode:: python
+
+        {
+            'id': 'rhel',
+            'version': '7.0',
+            'version_parts': {
+                'major': '7',
+                'minor': '0',
+                'build_number': ''
+            },
+            'like': 'fedora',
+            'codename': 'Maipo'
+        }
+
+    The dictionary structure and keys are always the same, regardless of which
+    information items are available in the underlying data sources. The values
+    for the various keys are as follows:
+
+    * ``id``:  The result of :func:`distro.id`.
+
+    * ``version``:  The result of :func:`distro.version`.
+
+    * ``version_parts -> major``:  The result of :func:`distro.major_version`.
+
+    * ``version_parts -> minor``:  The result of :func:`distro.minor_version`.
+
+    * ``version_parts -> build_number``:  The result of
+      :func:`distro.build_number`.
+
+    * ``like``:  The result of :func:`distro.like`.
+
+    * ``codename``:  The result of :func:`distro.codename`.
+
+    For a description of the *pretty* and *best* parameters, see the
+    :func:`distro.version` method.
+    """
+    return _distro.info(pretty, best)
+
+
+def os_release_info() -> Dict[str, str]:
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the os-release file data source of the current OS distribution.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_info()
+
+
+def lsb_release_info() -> Dict[str, str]:
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the lsb_release command data source of the current OS distribution.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_info()
+
+
+def distro_release_info() -> Dict[str, str]:
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_info()
+
+
+def uname_info() -> Dict[str, str]:
+    """
+    Return a dictionary containing key-value pairs for the information items
+    from the distro release file data source of the current OS distribution.
+    """
+    return _distro.uname_info()
+
+
+def os_release_attr(attribute: str) -> str:
+    """
+    Return a single named information item from the os-release file data source
+    of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `os-release file`_ for details about these information items.
+    """
+    return _distro.os_release_attr(attribute)
+
+
+def lsb_release_attr(attribute: str) -> str:
+    """
+    Return a single named information item from the lsb_release command output
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `lsb_release command output`_ for details about these information
+    items.
+    """
+    return _distro.lsb_release_attr(attribute)
+
+
+def distro_release_attr(attribute: str) -> str:
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+      The empty string, if the item does not exist.
+
+    See `distro release file`_ for details about these information items.
+    """
+    return _distro.distro_release_attr(attribute)
+
+
+def uname_attr(attribute: str) -> str:
+    """
+    Return a single named information item from the distro release file
+    data source of the current OS distribution.
+
+    Parameters:
+
+    * ``attribute`` (string): Key of the information item.
+
+    Returns:
+
+    * (string): Value of the information item, if the item exists.
+                The empty string, if the item does not exist.
+    """
+    return _distro.uname_attr(attribute)
+
+
+try:
+    from functools import cached_property
+except ImportError:
+    # Python < 3.8
+    class cached_property:  # type: ignore
+        """A version of @property which caches the value.  On access, it calls the
+        underlying function and sets the value in `__dict__` so future accesses
+        will not re-call the property.
+        """
+
+        def __init__(self, f: Callable[[Any], Any]) -> None:
+            self._fname = f.__name__
+            self._f = f
+
+        def __get__(self, obj: Any, owner: Type[Any]) -> Any:
+            assert obj is not None, f"call {self._fname} on an instance"
+            ret = obj.__dict__[self._fname] = self._f(obj)
+            return ret
+
+
+class LinuxDistribution:
+    """
+    Provides information about a OS distribution.
+
+    This package creates a private module-global instance of this class with
+    default initialization arguments, that is used by the
+    `consolidated accessor functions`_ and `single source accessor functions`_.
+    By using default initialization arguments, that module-global instance
+    returns data about the current OS distribution (i.e. the distro this
+    package runs on).
+
+    Normally, it is not necessary to create additional instances of this class.
+    However, in situations where control is needed over the exact data sources
+    that are used, instances of this class can be created with a specific
+    distro release file, or a specific os-release file, or without invoking the
+    lsb_release command.
+    """
+
+    def __init__(
+        self,
+        include_lsb: Optional[bool] = None,
+        os_release_file: str = "",
+        distro_release_file: str = "",
+        include_uname: Optional[bool] = None,
+        root_dir: Optional[str] = None,
+        include_oslevel: Optional[bool] = None,
+    ) -> None:
+        """
+        The initialization method of this class gathers information from the
+        available data sources, and stores that in private instance attributes.
+        Subsequent access to the information items uses these private instance
+        attributes, so that the data sources are read only once.
+
+        Parameters:
+
+        * ``include_lsb`` (bool): Controls whether the
+          `lsb_release command output`_ is included as a data source.
+
+          If the lsb_release command is not available in the program execution
+          path, the data source for the lsb_release command will be empty.
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause the default path name to
+          be used (see `os-release file`_ for details).
+
+          If the specified or defaulted os-release file does not exist, the
+          data source for the os-release file will be empty.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is to be used as a data source.
+
+          An empty string (the default) will cause a default search algorithm
+          to be used (see `distro release file`_ for details).
+
+          If the specified distro release file does not exist, or if no default
+          distro release file can be found, the data source for the distro
+          release file will be empty.
+
+        * ``include_uname`` (bool): Controls whether uname command output is
+          included as a data source. If the uname command is not available in
+          the program execution path the data source for the uname command will
+          be empty.
+
+        * ``root_dir`` (string): The absolute path to the root directory to use
+          to find distro-related information files. Note that ``include_*``
+          parameters must not be enabled in combination with ``root_dir``.
+
+        * ``include_oslevel`` (bool): Controls whether (AIX) oslevel command
+          output is included as a data source. If the oslevel command is not
+          available in the program execution path the data source will be
+          empty.
+
+        Public instance attributes:
+
+        * ``os_release_file`` (string): The path name of the
+          `os-release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``distro_release_file`` (string): The path name of the
+          `distro release file`_ that is actually used as a data source. The
+          empty string if no distro release file is used as a data source.
+
+        * ``include_lsb`` (bool): The result of the ``include_lsb`` parameter.
+          This controls whether the lsb information will be loaded.
+
+        * ``include_uname`` (bool): The result of the ``include_uname``
+          parameter. This controls whether the uname information will
+          be loaded.
+
+        * ``include_oslevel`` (bool): The result of the ``include_oslevel``
+          parameter. This controls whether (AIX) oslevel information will be
+          loaded.
+
+        * ``root_dir`` (string): The result of the ``root_dir`` parameter.
+          The absolute path to the root directory to use to find distro-related
+          information files.
+
+        Raises:
+
+        * :py:exc:`ValueError`: Initialization parameters combination is not
+           supported.
+
+        * :py:exc:`OSError`: Some I/O issue with an os-release file or distro
+          release file.
+
+        * :py:exc:`UnicodeError`: A data source has unexpected characters or
+          uses an unexpected encoding.
+        """
+        self.root_dir = root_dir
+        self.etc_dir = os.path.join(root_dir, "etc") if root_dir else _UNIXCONFDIR
+        self.usr_lib_dir = (
+            os.path.join(root_dir, "usr/lib") if root_dir else _UNIXUSRLIBDIR
+        )
+
+        if os_release_file:
+            self.os_release_file = os_release_file
+        else:
+            etc_dir_os_release_file = os.path.join(self.etc_dir, _OS_RELEASE_BASENAME)
+            usr_lib_os_release_file = os.path.join(
+                self.usr_lib_dir, _OS_RELEASE_BASENAME
+            )
+
+            # NOTE: The idea is to respect order **and** have it set
+            #       at all times for API backwards compatibility.
+            if os.path.isfile(etc_dir_os_release_file) or not os.path.isfile(
+                usr_lib_os_release_file
+            ):
+                self.os_release_file = etc_dir_os_release_file
+            else:
+                self.os_release_file = usr_lib_os_release_file
+
+        self.distro_release_file = distro_release_file or ""  # updated later
+
+        is_root_dir_defined = root_dir is not None
+        if is_root_dir_defined and (include_lsb or include_uname or include_oslevel):
+            raise ValueError(
+                "Including subprocess data sources from specific root_dir is disallowed"
+                " to prevent false information"
+            )
+        self.include_lsb = (
+            include_lsb if include_lsb is not None else not is_root_dir_defined
+        )
+        self.include_uname = (
+            include_uname if include_uname is not None else not is_root_dir_defined
+        )
+        self.include_oslevel = (
+            include_oslevel if include_oslevel is not None else not is_root_dir_defined
+        )
+
+    def __repr__(self) -> str:
+        """Return repr of all info"""
+        return (
+            "LinuxDistribution("
+            "os_release_file={self.os_release_file!r}, "
+            "distro_release_file={self.distro_release_file!r}, "
+            "include_lsb={self.include_lsb!r}, "
+            "include_uname={self.include_uname!r}, "
+            "include_oslevel={self.include_oslevel!r}, "
+            "root_dir={self.root_dir!r}, "
+            "_os_release_info={self._os_release_info!r}, "
+            "_lsb_release_info={self._lsb_release_info!r}, "
+            "_distro_release_info={self._distro_release_info!r}, "
+            "_uname_info={self._uname_info!r}, "
+            "_oslevel_info={self._oslevel_info!r})".format(self=self)
+        )
+
+    def linux_distribution(
+        self, full_distribution_name: bool = True
+    ) -> Tuple[str, str, str]:
+        """
+        Return information about the OS distribution that is compatible
+        with Python's :func:`platform.linux_distribution`, supporting a subset
+        of its parameters.
+
+        For details, see :func:`distro.linux_distribution`.
+        """
+        return (
+            self.name() if full_distribution_name else self.id(),
+            self.version(),
+            self._os_release_info.get("release_codename") or self.codename(),
+        )
+
+    def id(self) -> str:
+        """Return the distro ID of the OS distribution, as a string.
+
+        For details, see :func:`distro.id`.
+        """
+
+        def normalize(distro_id: str, table: Dict[str, str]) -> str:
+            distro_id = distro_id.lower().replace(" ", "_")
+            return table.get(distro_id, distro_id)
+
+        distro_id = self.os_release_attr("id")
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_OS_ID)
+
+        distro_id = self.lsb_release_attr("distributor_id")
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_LSB_ID)
+
+        distro_id = self.distro_release_attr("id")
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        distro_id = self.uname_attr("id")
+        if distro_id:
+            return normalize(distro_id, NORMALIZED_DISTRO_ID)
+
+        return ""
+
+    def name(self, pretty: bool = False) -> str:
+        """
+        Return the name of the OS distribution, as a string.
+
+        For details, see :func:`distro.name`.
+        """
+        name = (
+            self.os_release_attr("name")
+            or self.lsb_release_attr("distributor_id")
+            or self.distro_release_attr("name")
+            or self.uname_attr("name")
+        )
+        if pretty:
+            name = self.os_release_attr("pretty_name") or self.lsb_release_attr(
+                "description"
+            )
+            if not name:
+                name = self.distro_release_attr("name") or self.uname_attr("name")
+                version = self.version(pretty=True)
+                if version:
+                    name = f"{name} {version}"
+        return name or ""
+
+    def version(self, pretty: bool = False, best: bool = False) -> str:
+        """
+        Return the version of the OS distribution, as a string.
+
+        For details, see :func:`distro.version`.
+        """
+        versions = [
+            self.os_release_attr("version_id"),
+            self.lsb_release_attr("release"),
+            self.distro_release_attr("version_id"),
+            self._parse_distro_release_content(self.os_release_attr("pretty_name")).get(
+                "version_id", ""
+            ),
+            self._parse_distro_release_content(
+                self.lsb_release_attr("description")
+            ).get("version_id", ""),
+            self.uname_attr("release"),
+        ]
+        if self.uname_attr("id").startswith("aix"):
+            # On AIX platforms, prefer oslevel command output.
+            versions.insert(0, self.oslevel_info())
+        version = ""
+        if best:
+            # This algorithm uses the last version in priority order that has
+            # the best precision. If the versions are not in conflict, that
+            # does not matter; otherwise, using the last one instead of the
+            # first one might be considered a surprise.
+            for v in versions:
+                if v.count(".") > version.count(".") or version == "":
+                    version = v
+        else:
+            for v in versions:
+                if v != "":
+                    version = v
+                    break
+        if pretty and version and self.codename():
+            version = f"{version} ({self.codename()})"
+        return version
+
+    def version_parts(self, best: bool = False) -> Tuple[str, str, str]:
+        """
+        Return the version of the OS distribution, as a tuple of version
+        numbers.
+
+        For details, see :func:`distro.version_parts`.
+        """
+        version_str = self.version(best=best)
+        if version_str:
+            version_regex = re.compile(r"(\d+)\.?(\d+)?\.?(\d+)?")
+            matches = version_regex.match(version_str)
+            if matches:
+                major, minor, build_number = matches.groups()
+                return major, minor or "", build_number or ""
+        return "", "", ""
+
+    def major_version(self, best: bool = False) -> str:
+        """
+        Return the major version number of the current distribution.
+
+        For details, see :func:`distro.major_version`.
+        """
+        return self.version_parts(best)[0]
+
+    def minor_version(self, best: bool = False) -> str:
+        """
+        Return the minor version number of the current distribution.
+
+        For details, see :func:`distro.minor_version`.
+        """
+        return self.version_parts(best)[1]
+
+    def build_number(self, best: bool = False) -> str:
+        """
+        Return the build number of the current distribution.
+
+        For details, see :func:`distro.build_number`.
+        """
+        return self.version_parts(best)[2]
+
+    def like(self) -> str:
+        """
+        Return the IDs of distributions that are like the OS distribution.
+
+        For details, see :func:`distro.like`.
+        """
+        return self.os_release_attr("id_like") or ""
+
+    def codename(self) -> str:
+        """
+        Return the codename of the OS distribution.
+
+        For details, see :func:`distro.codename`.
+        """
+        try:
+            # Handle os_release specially since distros might purposefully set
+            # this to empty string to have no codename
+            return self._os_release_info["codename"]
+        except KeyError:
+            return (
+                self.lsb_release_attr("codename")
+                or self.distro_release_attr("codename")
+                or ""
+            )
+
+    def info(self, pretty: bool = False, best: bool = False) -> InfoDict:
+        """
+        Return certain machine-readable information about the OS
+        distribution.
+
+        For details, see :func:`distro.info`.
+        """
+        return dict(
+            id=self.id(),
+            version=self.version(pretty, best),
+            version_parts=dict(
+                major=self.major_version(best),
+                minor=self.minor_version(best),
+                build_number=self.build_number(best),
+            ),
+            like=self.like(),
+            codename=self.codename(),
+        )
+
+    def os_release_info(self) -> Dict[str, str]:
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the os-release file data source of the OS distribution.
+
+        For details, see :func:`distro.os_release_info`.
+        """
+        return self._os_release_info
+
+    def lsb_release_info(self) -> Dict[str, str]:
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the lsb_release command data source of the OS
+        distribution.
+
+        For details, see :func:`distro.lsb_release_info`.
+        """
+        return self._lsb_release_info
+
+    def distro_release_info(self) -> Dict[str, str]:
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the distro release file data source of the OS
+        distribution.
+
+        For details, see :func:`distro.distro_release_info`.
+        """
+        return self._distro_release_info
+
+    def uname_info(self) -> Dict[str, str]:
+        """
+        Return a dictionary containing key-value pairs for the information
+        items from the uname command data source of the OS distribution.
+
+        For details, see :func:`distro.uname_info`.
+        """
+        return self._uname_info
+
+    def oslevel_info(self) -> str:
+        """
+        Return AIX' oslevel command output.
+        """
+        return self._oslevel_info
+
+    def os_release_attr(self, attribute: str) -> str:
+        """
+        Return a single named information item from the os-release file data
+        source of the OS distribution.
+
+        For details, see :func:`distro.os_release_attr`.
+        """
+        return self._os_release_info.get(attribute, "")
+
+    def lsb_release_attr(self, attribute: str) -> str:
+        """
+        Return a single named information item from the lsb_release command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.lsb_release_attr`.
+        """
+        return self._lsb_release_info.get(attribute, "")
+
+    def distro_release_attr(self, attribute: str) -> str:
+        """
+        Return a single named information item from the distro release file
+        data source of the OS distribution.
+
+        For details, see :func:`distro.distro_release_attr`.
+        """
+        return self._distro_release_info.get(attribute, "")
+
+    def uname_attr(self, attribute: str) -> str:
+        """
+        Return a single named information item from the uname command
+        output data source of the OS distribution.
+
+        For details, see :func:`distro.uname_attr`.
+        """
+        return self._uname_info.get(attribute, "")
+
+    @cached_property
+    def _os_release_info(self) -> Dict[str, str]:
+        """
+        Get the information items from the specified os-release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if os.path.isfile(self.os_release_file):
+            with open(self.os_release_file, encoding="utf-8") as release_file:
+                return self._parse_os_release_content(release_file)
+        return {}
+
+    @staticmethod
+    def _parse_os_release_content(lines: TextIO) -> Dict[str, str]:
+        """
+        Parse the lines of an os-release file.
+
+        Parameters:
+
+        * lines: Iterable through the lines in the os-release file.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        lexer = shlex.shlex(lines, posix=True)
+        lexer.whitespace_split = True
+
+        tokens = list(lexer)
+        for token in tokens:
+            # At this point, all shell-like parsing has been done (i.e.
+            # comments processed, quotes and backslash escape sequences
+            # processed, multi-line values assembled, trailing newlines
+            # stripped, etc.), so the tokens are now either:
+            # * variable assignments: var=value
+            # * commands or their arguments (not allowed in os-release)
+            # Ignore any tokens that are not variable assignments
+            if "=" in token:
+                k, v = token.split("=", 1)
+                props[k.lower()] = v
+
+        if "version" in props:
+            # extract release codename (if any) from version attribute
+            match = re.search(r"\((\D+)\)|,\s*(\D+)", props["version"])
+            if match:
+                release_codename = match.group(1) or match.group(2)
+                props["codename"] = props["release_codename"] = release_codename
+
+        if "version_codename" in props:
+            # os-release added a version_codename field.  Use that in
+            # preference to anything else Note that some distros purposefully
+            # do not have code names.  They should be setting
+            # version_codename=""
+            props["codename"] = props["version_codename"]
+        elif "ubuntu_codename" in props:
+            # Same as above but a non-standard field name used on older Ubuntus
+            props["codename"] = props["ubuntu_codename"]
+
+        return props
+
+    @cached_property
+    def _lsb_release_info(self) -> Dict[str, str]:
+        """
+        Get the information items from the lsb_release command output.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if not self.include_lsb:
+            return {}
+        try:
+            cmd = ("lsb_release", "-a")
+            stdout = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
+        # Command not found or lsb_release returned error
+        except (OSError, subprocess.CalledProcessError):
+            return {}
+        content = self._to_str(stdout).splitlines()
+        return self._parse_lsb_release_content(content)
+
+    @staticmethod
+    def _parse_lsb_release_content(lines: Iterable[str]) -> Dict[str, str]:
+        """
+        Parse the output of the lsb_release command.
+
+        Parameters:
+
+        * lines: Iterable through the lines of the lsb_release output.
+                 Each line must be a unicode string or a UTF-8 encoded byte
+                 string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        props = {}
+        for line in lines:
+            kv = line.strip("\n").split(":", 1)
+            if len(kv) != 2:
+                # Ignore lines without colon.
+                continue
+            k, v = kv
+            props.update({k.replace(" ", "_").lower(): v.strip()})
+        return props
+
+    @cached_property
+    def _uname_info(self) -> Dict[str, str]:
+        if not self.include_uname:
+            return {}
+        try:
+            cmd = ("uname", "-rs")
+            stdout = subprocess.check_output(cmd, stderr=subprocess.DEVNULL)
+        except OSError:
+            return {}
+        content = self._to_str(stdout).splitlines()
+        return self._parse_uname_content(content)
+
+    @cached_property
+    def _oslevel_info(self) -> str:
+        if not self.include_oslevel:
+            return ""
+        try:
+            stdout = subprocess.check_output("oslevel", stderr=subprocess.DEVNULL)
+        except (OSError, subprocess.CalledProcessError):
+            return ""
+        return self._to_str(stdout).strip()
+
+    @staticmethod
+    def _parse_uname_content(lines: Sequence[str]) -> Dict[str, str]:
+        if not lines:
+            return {}
+        props = {}
+        match = re.search(r"^([^\s]+)\s+([\d\.]+)", lines[0].strip())
+        if match:
+            name, version = match.groups()
+
+            # This is to prevent the Linux kernel version from
+            # appearing as the 'best' version on otherwise
+            # identifiable distributions.
+            if name == "Linux":
+                return {}
+            props["id"] = name.lower()
+            props["name"] = name
+            props["release"] = version
+        return props
+
+    @staticmethod
+    def _to_str(bytestring: bytes) -> str:
+        encoding = sys.getfilesystemencoding()
+        return bytestring.decode(encoding)
+
+    @cached_property
+    def _distro_release_info(self) -> Dict[str, str]:
+        """
+        Get the information items from the specified distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        if self.distro_release_file:
+            # If it was specified, we use it and parse what we can, even if
+            # its file name or content does not match the expected pattern.
+            distro_info = self._parse_distro_release_file(self.distro_release_file)
+            basename = os.path.basename(self.distro_release_file)
+            # The file name pattern for user-specified distro release files
+            # is somewhat more tolerant (compared to when searching for the
+            # file), because we want to use what was specified as best as
+            # possible.
+            match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+            if "name" in distro_info and "cloudlinux" in distro_info["name"].lower():
+                distro_info["id"] = "cloudlinux"
+            elif match:
+                distro_info["id"] = match.group(1)
+            return distro_info
+        else:
+            try:
+                basenames = os.listdir(self.etc_dir)
+                # We sort for repeatability in cases where there are multiple
+                # distro specific files; e.g. CentOS, Oracle, Enterprise all
+                # containing `redhat-release` on top of their own.
+                basenames.sort()
+            except OSError:
+                # This may occur when /etc is not readable but we can't be
+                # sure about the *-release files. Check common entries of
+                # /etc for information. If they turn out to not be there the
+                # error is handled in `_parse_distro_release_file()`.
+                basenames = [
+                    "SuSE-release",
+                    "arch-release",
+                    "base-release",
+                    "centos-release",
+                    "fedora-release",
+                    "gentoo-release",
+                    "mageia-release",
+                    "mandrake-release",
+                    "mandriva-release",
+                    "mandrivalinux-release",
+                    "manjaro-release",
+                    "oracle-release",
+                    "redhat-release",
+                    "rocky-release",
+                    "sl-release",
+                    "slackware-version",
+                ]
+            for basename in basenames:
+                if basename in _DISTRO_RELEASE_IGNORE_BASENAMES:
+                    continue
+                match = _DISTRO_RELEASE_BASENAME_PATTERN.match(basename)
+                if match:
+                    filepath = os.path.join(self.etc_dir, basename)
+                    distro_info = self._parse_distro_release_file(filepath)
+                    if "name" in distro_info:
+                        # The name is always present if the pattern matches
+                        self.distro_release_file = filepath
+                        distro_info["id"] = match.group(1)
+                        if "cloudlinux" in distro_info["name"].lower():
+                            distro_info["id"] = "cloudlinux"
+                        return distro_info
+            return {}
+
+    def _parse_distro_release_file(self, filepath: str) -> Dict[str, str]:
+        """
+        Parse a distro release file.
+
+        Parameters:
+
+        * filepath: Path name of the distro release file.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        try:
+            with open(filepath, encoding="utf-8") as fp:
+                # Only parse the first line. For instance, on SLES there
+                # are multiple lines. We don't want them...
+                return self._parse_distro_release_content(fp.readline())
+        except OSError:
+            # Ignore not being able to read a specific, seemingly version
+            # related file.
+            # See https://github.com/python-distro/distro/issues/162
+            return {}
+
+    @staticmethod
+    def _parse_distro_release_content(line: str) -> Dict[str, str]:
+        """
+        Parse a line from a distro release file.
+
+        Parameters:
+        * line: Line from the distro release file. Must be a unicode string
+                or a UTF-8 encoded byte string.
+
+        Returns:
+            A dictionary containing all information items.
+        """
+        matches = _DISTRO_RELEASE_CONTENT_REVERSED_PATTERN.match(line.strip()[::-1])
+        distro_info = {}
+        if matches:
+            # regexp ensures non-None
+            distro_info["name"] = matches.group(3)[::-1]
+            if matches.group(2):
+                distro_info["version_id"] = matches.group(2)[::-1]
+            if matches.group(1):
+                distro_info["codename"] = matches.group(1)[::-1]
+        elif line:
+            distro_info["name"] = line.strip()
+        return distro_info
+
+
+_distro = LinuxDistribution()
+
+
+def main() -> None:
+    logger = logging.getLogger(__name__)
+    logger.setLevel(logging.DEBUG)
+    logger.addHandler(logging.StreamHandler(sys.stdout))
+
+    parser = argparse.ArgumentParser(description="OS distro info tool")
+    parser.add_argument(
+        "--json", "-j", help="Output in machine readable format", action="store_true"
+    )
+
+    parser.add_argument(
+        "--root-dir",
+        "-r",
+        type=str,
+        dest="root_dir",
+        help="Path to the root filesystem directory (defaults to /)",
+    )
+
+    args = parser.parse_args()
+
+    if args.root_dir:
+        dist = LinuxDistribution(
+            include_lsb=False,
+            include_uname=False,
+            include_oslevel=False,
+            root_dir=args.root_dir,
+        )
+    else:
+        dist = _distro
+
+    if args.json:
+        logger.info(json.dumps(dist.info(), indent=4, sort_keys=True))
+    else:
+        logger.info("Name: %s", dist.name(pretty=True))
+        distribution_version = dist.version(pretty=True)
+        logger.info("Version: %s", distribution_version)
+        distribution_codename = dist.codename()
+        logger.info("Codename: %s", distribution_codename)
+
+
+if __name__ == "__main__":
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__init__.py
new file mode 100644
index 0000000..a40eeaf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__init__.py
@@ -0,0 +1,44 @@
+from .package_data import __version__
+from .core import (
+    IDNABidiError,
+    IDNAError,
+    InvalidCodepoint,
+    InvalidCodepointContext,
+    alabel,
+    check_bidi,
+    check_hyphen_ok,
+    check_initial_combiner,
+    check_label,
+    check_nfc,
+    decode,
+    encode,
+    ulabel,
+    uts46_remap,
+    valid_contextj,
+    valid_contexto,
+    valid_label_length,
+    valid_string_length,
+)
+from .intranges import intranges_contain
+
+__all__ = [
+    "IDNABidiError",
+    "IDNAError",
+    "InvalidCodepoint",
+    "InvalidCodepointContext",
+    "alabel",
+    "check_bidi",
+    "check_hyphen_ok",
+    "check_initial_combiner",
+    "check_label",
+    "check_nfc",
+    "decode",
+    "encode",
+    "intranges_contain",
+    "ulabel",
+    "uts46_remap",
+    "valid_contextj",
+    "valid_contexto",
+    "valid_label_length",
+    "valid_string_length",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/core.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/core.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/idnadata.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/idnadata.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/intranges.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/intranges.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-39.pyc
new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/package_data.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-39.pyc
new file mode 100644
index 0000000..d1a8ed0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/__pycache__/uts46data.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/codec.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/codec.py
new file mode 100644
index 0000000..1ca9ba6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/codec.py
@@ -0,0 +1,112 @@
+from .core import encode, decode, alabel, ulabel, IDNAError
+import codecs
+import re
+from typing import Tuple, Optional
+
+_unicode_dots_re = re.compile('[\u002e\u3002\uff0e\uff61]')
+
+class Codec(codecs.Codec):
+
+    def encode(self, data: str, errors: str = 'strict') -> Tuple[bytes, int]:
+        if errors != 'strict':
+            raise IDNAError('Unsupported error handling \"{}\"'.format(errors))
+
+        if not data:
+            return b"", 0
+
+        return encode(data), len(data)
+
+    def decode(self, data: bytes, errors: str = 'strict') -> Tuple[str, int]:
+        if errors != 'strict':
+            raise IDNAError('Unsupported error handling \"{}\"'.format(errors))
+
+        if not data:
+            return '', 0
+
+        return decode(data), len(data)
+
+class IncrementalEncoder(codecs.BufferedIncrementalEncoder):
+    def _buffer_encode(self, data: str, errors: str, final: bool) -> Tuple[str, int]:  # type: ignore
+        if errors != 'strict':
+            raise IDNAError('Unsupported error handling \"{}\"'.format(errors))
+
+        if not data:
+            return "", 0
+
+        labels = _unicode_dots_re.split(data)
+        trailing_dot = ''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = '.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = '.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(alabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        # Join with U+002E
+        result_str = '.'.join(result) + trailing_dot  # type: ignore
+        size += len(trailing_dot)
+        return result_str, size
+
+class IncrementalDecoder(codecs.BufferedIncrementalDecoder):
+    def _buffer_decode(self, data: str, errors: str, final: bool) -> Tuple[str, int]:  # type: ignore
+        if errors != 'strict':
+            raise IDNAError('Unsupported error handling \"{}\"'.format(errors))
+
+        if not data:
+            return ('', 0)
+
+        labels = _unicode_dots_re.split(data)
+        trailing_dot = ''
+        if labels:
+            if not labels[-1]:
+                trailing_dot = '.'
+                del labels[-1]
+            elif not final:
+                # Keep potentially unfinished label until the next call
+                del labels[-1]
+                if labels:
+                    trailing_dot = '.'
+
+        result = []
+        size = 0
+        for label in labels:
+            result.append(ulabel(label))
+            if size:
+                size += 1
+            size += len(label)
+
+        result_str = '.'.join(result) + trailing_dot
+        size += len(trailing_dot)
+        return (result_str, size)
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+
+def getregentry() -> codecs.CodecInfo:
+    # Compatibility as a search_function for codecs.register()
+    return codecs.CodecInfo(
+        name='idna',
+        encode=Codec().encode,  # type: ignore
+        decode=Codec().decode,  # type: ignore
+        incrementalencoder=IncrementalEncoder,
+        incrementaldecoder=IncrementalDecoder,
+        streamwriter=StreamWriter,
+        streamreader=StreamReader,
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/compat.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/compat.py
new file mode 100644
index 0000000..786e6bd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/compat.py
@@ -0,0 +1,13 @@
+from .core import *
+from .codec import *
+from typing import Any, Union
+
+def ToASCII(label: str) -> bytes:
+    return encode(label)
+
+def ToUnicode(label: Union[bytes, bytearray]) -> str:
+    return decode(label)
+
+def nameprep(s: Any) -> None:
+    raise NotImplementedError('IDNA 2008 does not utilise nameprep protocol')
+
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/core.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/core.py
new file mode 100644
index 0000000..4f30037
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/core.py
@@ -0,0 +1,400 @@
+from . import idnadata
+import bisect
+import unicodedata
+import re
+from typing import Union, Optional
+from .intranges import intranges_contain
+
+_virama_combining_class = 9
+_alabel_prefix = b'xn--'
+_unicode_dots_re = re.compile('[\u002e\u3002\uff0e\uff61]')
+
+class IDNAError(UnicodeError):
+    """ Base exception for all IDNA-encoding related problems """
+    pass
+
+
+class IDNABidiError(IDNAError):
+    """ Exception when bidirectional requirements are not satisfied """
+    pass
+
+
+class InvalidCodepoint(IDNAError):
+    """ Exception when a disallowed or unallocated codepoint is used """
+    pass
+
+
+class InvalidCodepointContext(IDNAError):
+    """ Exception when the codepoint is not valid in the context it is used """
+    pass
+
+
+def _combining_class(cp: int) -> int:
+    v = unicodedata.combining(chr(cp))
+    if v == 0:
+        if not unicodedata.name(chr(cp)):
+            raise ValueError('Unknown character in unicodedata')
+    return v
+
+def _is_script(cp: str, script: str) -> bool:
+    return intranges_contain(ord(cp), idnadata.scripts[script])
+
+def _punycode(s: str) -> bytes:
+    return s.encode('punycode')
+
+def _unot(s: int) -> str:
+    return 'U+{:04X}'.format(s)
+
+
+def valid_label_length(label: Union[bytes, str]) -> bool:
+    if len(label) > 63:
+        return False
+    return True
+
+
+def valid_string_length(label: Union[bytes, str], trailing_dot: bool) -> bool:
+    if len(label) > (254 if trailing_dot else 253):
+        return False
+    return True
+
+
+def check_bidi(label: str, check_ltr: bool = False) -> bool:
+    # Bidi rules should only be applied if string contains RTL characters
+    bidi_label = False
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+        if direction == '':
+            # String likely comes from a newer version of Unicode
+            raise IDNABidiError('Unknown directionality in label {} at position {}'.format(repr(label), idx))
+        if direction in ['R', 'AL', 'AN']:
+            bidi_label = True
+    if not bidi_label and not check_ltr:
+        return True
+
+    # Bidi rule 1
+    direction = unicodedata.bidirectional(label[0])
+    if direction in ['R', 'AL']:
+        rtl = True
+    elif direction == 'L':
+        rtl = False
+    else:
+        raise IDNABidiError('First codepoint in label {} must be directionality L, R or AL'.format(repr(label)))
+
+    valid_ending = False
+    number_type = None  # type: Optional[str]
+    for (idx, cp) in enumerate(label, 1):
+        direction = unicodedata.bidirectional(cp)
+
+        if rtl:
+            # Bidi rule 2
+            if not direction in ['R', 'AL', 'AN', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {} in a right-to-left label'.format(idx))
+            # Bidi rule 3
+            if direction in ['R', 'AL', 'EN', 'AN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+            # Bidi rule 4
+            if direction in ['AN', 'EN']:
+                if not number_type:
+                    number_type = direction
+                else:
+                    if number_type != direction:
+                        raise IDNABidiError('Can not mix numeral types in a right-to-left label')
+        else:
+            # Bidi rule 5
+            if not direction in ['L', 'EN', 'ES', 'CS', 'ET', 'ON', 'BN', 'NSM']:
+                raise IDNABidiError('Invalid direction for codepoint at position {} in a left-to-right label'.format(idx))
+            # Bidi rule 6
+            if direction in ['L', 'EN']:
+                valid_ending = True
+            elif direction != 'NSM':
+                valid_ending = False
+
+    if not valid_ending:
+        raise IDNABidiError('Label ends with illegal codepoint directionality')
+
+    return True
+
+
+def check_initial_combiner(label: str) -> bool:
+    if unicodedata.category(label[0])[0] == 'M':
+        raise IDNAError('Label begins with an illegal combining character')
+    return True
+
+
+def check_hyphen_ok(label: str) -> bool:
+    if label[2:4] == '--':
+        raise IDNAError('Label has disallowed hyphens in 3rd and 4th position')
+    if label[0] == '-' or label[-1] == '-':
+        raise IDNAError('Label must not start or end with a hyphen')
+    return True
+
+
+def check_nfc(label: str) -> None:
+    if unicodedata.normalize('NFC', label) != label:
+        raise IDNAError('Label must be in Normalization Form C')
+
+
+def valid_contextj(label: str, pos: int) -> bool:
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x200c:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+
+        ok = False
+        for i in range(pos-1, -1, -1):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('L'), ord('D')]:
+                ok = True
+                break
+
+        if not ok:
+            return False
+
+        ok = False
+        for i in range(pos+1, len(label)):
+            joining_type = idnadata.joining_types.get(ord(label[i]))
+            if joining_type == ord('T'):
+                continue
+            if joining_type in [ord('R'), ord('D')]:
+                ok = True
+                break
+        return ok
+
+    if cp_value == 0x200d:
+
+        if pos > 0:
+            if _combining_class(ord(label[pos - 1])) == _virama_combining_class:
+                return True
+        return False
+
+    else:
+
+        return False
+
+
+def valid_contexto(label: str, pos: int, exception: bool = False) -> bool:
+    cp_value = ord(label[pos])
+
+    if cp_value == 0x00b7:
+        if 0 < pos < len(label)-1:
+            if ord(label[pos - 1]) == 0x006c and ord(label[pos + 1]) == 0x006c:
+                return True
+        return False
+
+    elif cp_value == 0x0375:
+        if pos < len(label)-1 and len(label) > 1:
+            return _is_script(label[pos + 1], 'Greek')
+        return False
+
+    elif cp_value == 0x05f3 or cp_value == 0x05f4:
+        if pos > 0:
+            return _is_script(label[pos - 1], 'Hebrew')
+        return False
+
+    elif cp_value == 0x30fb:
+        for cp in label:
+            if cp == '\u30fb':
+                continue
+            if _is_script(cp, 'Hiragana') or _is_script(cp, 'Katakana') or _is_script(cp, 'Han'):
+                return True
+        return False
+
+    elif 0x660 <= cp_value <= 0x669:
+        for cp in label:
+            if 0x6f0 <= ord(cp) <= 0x06f9:
+                return False
+        return True
+
+    elif 0x6f0 <= cp_value <= 0x6f9:
+        for cp in label:
+            if 0x660 <= ord(cp) <= 0x0669:
+                return False
+        return True
+
+    return False
+
+
+def check_label(label: Union[str, bytes, bytearray]) -> None:
+    if isinstance(label, (bytes, bytearray)):
+        label = label.decode('utf-8')
+    if len(label) == 0:
+        raise IDNAError('Empty Label')
+
+    check_nfc(label)
+    check_hyphen_ok(label)
+    check_initial_combiner(label)
+
+    for (pos, cp) in enumerate(label):
+        cp_value = ord(cp)
+        if intranges_contain(cp_value, idnadata.codepoint_classes['PVALID']):
+            continue
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTJ']):
+            try:
+                if not valid_contextj(label, pos):
+                    raise InvalidCodepointContext('Joiner {} not allowed at position {} in {}'.format(
+                        _unot(cp_value), pos+1, repr(label)))
+            except ValueError:
+                raise IDNAError('Unknown codepoint adjacent to joiner {} at position {} in {}'.format(
+                    _unot(cp_value), pos+1, repr(label)))
+        elif intranges_contain(cp_value, idnadata.codepoint_classes['CONTEXTO']):
+            if not valid_contexto(label, pos):
+                raise InvalidCodepointContext('Codepoint {} not allowed at position {} in {}'.format(_unot(cp_value), pos+1, repr(label)))
+        else:
+            raise InvalidCodepoint('Codepoint {} at position {} of {} not allowed'.format(_unot(cp_value), pos+1, repr(label)))
+
+    check_bidi(label)
+
+
+def alabel(label: str) -> bytes:
+    try:
+        label_bytes = label.encode('ascii')
+        ulabel(label_bytes)
+        if not valid_label_length(label_bytes):
+            raise IDNAError('Label too long')
+        return label_bytes
+    except UnicodeEncodeError:
+        pass
+
+    if not label:
+        raise IDNAError('No Input')
+
+    label = str(label)
+    check_label(label)
+    label_bytes = _punycode(label)
+    label_bytes = _alabel_prefix + label_bytes
+
+    if not valid_label_length(label_bytes):
+        raise IDNAError('Label too long')
+
+    return label_bytes
+
+
+def ulabel(label: Union[str, bytes, bytearray]) -> str:
+    if not isinstance(label, (bytes, bytearray)):
+        try:
+            label_bytes = label.encode('ascii')
+        except UnicodeEncodeError:
+            check_label(label)
+            return label
+    else:
+        label_bytes = label
+
+    label_bytes = label_bytes.lower()
+    if label_bytes.startswith(_alabel_prefix):
+        label_bytes = label_bytes[len(_alabel_prefix):]
+        if not label_bytes:
+            raise IDNAError('Malformed A-label, no Punycode eligible content found')
+        if label_bytes.decode('ascii')[-1] == '-':
+            raise IDNAError('A-label must not end with a hyphen')
+    else:
+        check_label(label_bytes)
+        return label_bytes.decode('ascii')
+
+    try:
+        label = label_bytes.decode('punycode')
+    except UnicodeError:
+        raise IDNAError('Invalid A-label')
+    check_label(label)
+    return label
+
+
+def uts46_remap(domain: str, std3_rules: bool = True, transitional: bool = False) -> str:
+    """Re-map the characters in the string according to UTS46 processing."""
+    from .uts46data import uts46data
+    output = ''
+
+    for pos, char in enumerate(domain):
+        code_point = ord(char)
+        try:
+            uts46row = uts46data[code_point if code_point < 256 else
+                bisect.bisect_left(uts46data, (code_point, 'Z')) - 1]
+            status = uts46row[1]
+            replacement = None  # type: Optional[str]
+            if len(uts46row) == 3:
+                replacement = uts46row[2]  # type: ignore
+            if (status == 'V' or
+                    (status == 'D' and not transitional) or
+                    (status == '3' and not std3_rules and replacement is None)):
+                output += char
+            elif replacement is not None and (status == 'M' or
+                    (status == '3' and not std3_rules) or
+                    (status == 'D' and transitional)):
+                output += replacement
+            elif status != 'I':
+                raise IndexError()
+        except IndexError:
+            raise InvalidCodepoint(
+                'Codepoint {} not allowed at position {} in {}'.format(
+                _unot(code_point), pos + 1, repr(domain)))
+
+    return unicodedata.normalize('NFC', output)
+
+
+def encode(s: Union[str, bytes, bytearray], strict: bool = False, uts46: bool = False, std3_rules: bool = False, transitional: bool = False) -> bytes:
+    if isinstance(s, (bytes, bytearray)):
+        try:
+            s = s.decode('ascii')
+        except UnicodeDecodeError:
+            raise IDNAError('should pass a unicode string to the function rather than a byte string.')
+    if uts46:
+        s = uts46_remap(s, std3_rules, transitional)
+    trailing_dot = False
+    result = []
+    if strict:
+        labels = s.split('.')
+    else:
+        labels = _unicode_dots_re.split(s)
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if labels[-1] == '':
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = alabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append(b'')
+    s = b'.'.join(result)
+    if not valid_string_length(s, trailing_dot):
+        raise IDNAError('Domain too long')
+    return s
+
+
+def decode(s: Union[str, bytes, bytearray], strict: bool = False, uts46: bool = False, std3_rules: bool = False) -> str:
+    try:
+        if isinstance(s, (bytes, bytearray)):
+            s = s.decode('ascii')
+    except UnicodeDecodeError:
+        raise IDNAError('Invalid ASCII in A-label')
+    if uts46:
+        s = uts46_remap(s, std3_rules, False)
+    trailing_dot = False
+    result = []
+    if not strict:
+        labels = _unicode_dots_re.split(s)
+    else:
+        labels = s.split('.')
+    if not labels or labels == ['']:
+        raise IDNAError('Empty domain')
+    if not labels[-1]:
+        del labels[-1]
+        trailing_dot = True
+    for label in labels:
+        s = ulabel(label)
+        if s:
+            result.append(s)
+        else:
+            raise IDNAError('Empty label')
+    if trailing_dot:
+        result.append('')
+    return '.'.join(result)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/idnadata.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/idnadata.py
new file mode 100644
index 0000000..67db462
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/idnadata.py
@@ -0,0 +1,2151 @@
+# This file is automatically generated by tools/idna-data
+
+__version__ = '15.0.0'
+scripts = {
+    'Greek': (
+        0x37000000374,
+        0x37500000378,
+        0x37a0000037e,
+        0x37f00000380,
+        0x38400000385,
+        0x38600000387,
+        0x3880000038b,
+        0x38c0000038d,
+        0x38e000003a2,
+        0x3a3000003e2,
+        0x3f000000400,
+        0x1d2600001d2b,
+        0x1d5d00001d62,
+        0x1d6600001d6b,
+        0x1dbf00001dc0,
+        0x1f0000001f16,
+        0x1f1800001f1e,
+        0x1f2000001f46,
+        0x1f4800001f4e,
+        0x1f5000001f58,
+        0x1f5900001f5a,
+        0x1f5b00001f5c,
+        0x1f5d00001f5e,
+        0x1f5f00001f7e,
+        0x1f8000001fb5,
+        0x1fb600001fc5,
+        0x1fc600001fd4,
+        0x1fd600001fdc,
+        0x1fdd00001ff0,
+        0x1ff200001ff5,
+        0x1ff600001fff,
+        0x212600002127,
+        0xab650000ab66,
+        0x101400001018f,
+        0x101a0000101a1,
+        0x1d2000001d246,
+    ),
+    'Han': (
+        0x2e8000002e9a,
+        0x2e9b00002ef4,
+        0x2f0000002fd6,
+        0x300500003006,
+        0x300700003008,
+        0x30210000302a,
+        0x30380000303c,
+        0x340000004dc0,
+        0x4e000000a000,
+        0xf9000000fa6e,
+        0xfa700000fada,
+        0x16fe200016fe4,
+        0x16ff000016ff2,
+        0x200000002a6e0,
+        0x2a7000002b73a,
+        0x2b7400002b81e,
+        0x2b8200002cea2,
+        0x2ceb00002ebe1,
+        0x2f8000002fa1e,
+        0x300000003134b,
+        0x31350000323b0,
+    ),
+    'Hebrew': (
+        0x591000005c8,
+        0x5d0000005eb,
+        0x5ef000005f5,
+        0xfb1d0000fb37,
+        0xfb380000fb3d,
+        0xfb3e0000fb3f,
+        0xfb400000fb42,
+        0xfb430000fb45,
+        0xfb460000fb50,
+    ),
+    'Hiragana': (
+        0x304100003097,
+        0x309d000030a0,
+        0x1b0010001b120,
+        0x1b1320001b133,
+        0x1b1500001b153,
+        0x1f2000001f201,
+    ),
+    'Katakana': (
+        0x30a1000030fb,
+        0x30fd00003100,
+        0x31f000003200,
+        0x32d0000032ff,
+        0x330000003358,
+        0xff660000ff70,
+        0xff710000ff9e,
+        0x1aff00001aff4,
+        0x1aff50001affc,
+        0x1affd0001afff,
+        0x1b0000001b001,
+        0x1b1200001b123,
+        0x1b1550001b156,
+        0x1b1640001b168,
+    ),
+}
+joining_types = {
+    0x600: 85,
+    0x601: 85,
+    0x602: 85,
+    0x603: 85,
+    0x604: 85,
+    0x605: 85,
+    0x608: 85,
+    0x60b: 85,
+    0x620: 68,
+    0x621: 85,
+    0x622: 82,
+    0x623: 82,
+    0x624: 82,
+    0x625: 82,
+    0x626: 68,
+    0x627: 82,
+    0x628: 68,
+    0x629: 82,
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+    0x62b: 68,
+    0x62c: 68,
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+    0x62e: 68,
+    0x62f: 82,
+    0x630: 82,
+    0x631: 82,
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+    0xa86e: 68,
+    0xa86f: 68,
+    0xa870: 68,
+    0xa871: 68,
+    0xa872: 76,
+    0xa873: 85,
+    0x10ac0: 68,
+    0x10ac1: 68,
+    0x10ac2: 68,
+    0x10ac3: 68,
+    0x10ac4: 68,
+    0x10ac5: 82,
+    0x10ac6: 85,
+    0x10ac7: 82,
+    0x10ac8: 85,
+    0x10ac9: 82,
+    0x10aca: 82,
+    0x10acb: 85,
+    0x10acc: 85,
+    0x10acd: 76,
+    0x10ace: 82,
+    0x10acf: 82,
+    0x10ad0: 82,
+    0x10ad1: 82,
+    0x10ad2: 82,
+    0x10ad3: 68,
+    0x10ad4: 68,
+    0x10ad5: 68,
+    0x10ad6: 68,
+    0x10ad7: 76,
+    0x10ad8: 68,
+    0x10ad9: 68,
+    0x10ada: 68,
+    0x10adb: 68,
+    0x10adc: 68,
+    0x10add: 82,
+    0x10ade: 68,
+    0x10adf: 68,
+    0x10ae0: 68,
+    0x10ae1: 82,
+    0x10ae2: 85,
+    0x10ae3: 85,
+    0x10ae4: 82,
+    0x10aeb: 68,
+    0x10aec: 68,
+    0x10aed: 68,
+    0x10aee: 68,
+    0x10aef: 82,
+    0x10b80: 68,
+    0x10b81: 82,
+    0x10b82: 68,
+    0x10b83: 82,
+    0x10b84: 82,
+    0x10b85: 82,
+    0x10b86: 68,
+    0x10b87: 68,
+    0x10b88: 68,
+    0x10b89: 82,
+    0x10b8a: 68,
+    0x10b8b: 68,
+    0x10b8c: 82,
+    0x10b8d: 68,
+    0x10b8e: 82,
+    0x10b8f: 82,
+    0x10b90: 68,
+    0x10b91: 82,
+    0x10ba9: 82,
+    0x10baa: 82,
+    0x10bab: 82,
+    0x10bac: 82,
+    0x10bad: 68,
+    0x10bae: 68,
+    0x10baf: 85,
+    0x10d00: 76,
+    0x10d01: 68,
+    0x10d02: 68,
+    0x10d03: 68,
+    0x10d04: 68,
+    0x10d05: 68,
+    0x10d06: 68,
+    0x10d07: 68,
+    0x10d08: 68,
+    0x10d09: 68,
+    0x10d0a: 68,
+    0x10d0b: 68,
+    0x10d0c: 68,
+    0x10d0d: 68,
+    0x10d0e: 68,
+    0x10d0f: 68,
+    0x10d10: 68,
+    0x10d11: 68,
+    0x10d12: 68,
+    0x10d13: 68,
+    0x10d14: 68,
+    0x10d15: 68,
+    0x10d16: 68,
+    0x10d17: 68,
+    0x10d18: 68,
+    0x10d19: 68,
+    0x10d1a: 68,
+    0x10d1b: 68,
+    0x10d1c: 68,
+    0x10d1d: 68,
+    0x10d1e: 68,
+    0x10d1f: 68,
+    0x10d20: 68,
+    0x10d21: 68,
+    0x10d22: 82,
+    0x10d23: 68,
+    0x10f30: 68,
+    0x10f31: 68,
+    0x10f32: 68,
+    0x10f33: 82,
+    0x10f34: 68,
+    0x10f35: 68,
+    0x10f36: 68,
+    0x10f37: 68,
+    0x10f38: 68,
+    0x10f39: 68,
+    0x10f3a: 68,
+    0x10f3b: 68,
+    0x10f3c: 68,
+    0x10f3d: 68,
+    0x10f3e: 68,
+    0x10f3f: 68,
+    0x10f40: 68,
+    0x10f41: 68,
+    0x10f42: 68,
+    0x10f43: 68,
+    0x10f44: 68,
+    0x10f45: 85,
+    0x10f51: 68,
+    0x10f52: 68,
+    0x10f53: 68,
+    0x10f54: 82,
+    0x10f70: 68,
+    0x10f71: 68,
+    0x10f72: 68,
+    0x10f73: 68,
+    0x10f74: 82,
+    0x10f75: 82,
+    0x10f76: 68,
+    0x10f77: 68,
+    0x10f78: 68,
+    0x10f79: 68,
+    0x10f7a: 68,
+    0x10f7b: 68,
+    0x10f7c: 68,
+    0x10f7d: 68,
+    0x10f7e: 68,
+    0x10f7f: 68,
+    0x10f80: 68,
+    0x10f81: 68,
+    0x10fb0: 68,
+    0x10fb1: 85,
+    0x10fb2: 68,
+    0x10fb3: 68,
+    0x10fb4: 82,
+    0x10fb5: 82,
+    0x10fb6: 82,
+    0x10fb7: 85,
+    0x10fb8: 68,
+    0x10fb9: 82,
+    0x10fba: 82,
+    0x10fbb: 68,
+    0x10fbc: 68,
+    0x10fbd: 82,
+    0x10fbe: 68,
+    0x10fbf: 68,
+    0x10fc0: 85,
+    0x10fc1: 68,
+    0x10fc2: 82,
+    0x10fc3: 82,
+    0x10fc4: 68,
+    0x10fc5: 85,
+    0x10fc6: 85,
+    0x10fc7: 85,
+    0x10fc8: 85,
+    0x10fc9: 82,
+    0x10fca: 68,
+    0x10fcb: 76,
+    0x110bd: 85,
+    0x110cd: 85,
+    0x1e900: 68,
+    0x1e901: 68,
+    0x1e902: 68,
+    0x1e903: 68,
+    0x1e904: 68,
+    0x1e905: 68,
+    0x1e906: 68,
+    0x1e907: 68,
+    0x1e908: 68,
+    0x1e909: 68,
+    0x1e90a: 68,
+    0x1e90b: 68,
+    0x1e90c: 68,
+    0x1e90d: 68,
+    0x1e90e: 68,
+    0x1e90f: 68,
+    0x1e910: 68,
+    0x1e911: 68,
+    0x1e912: 68,
+    0x1e913: 68,
+    0x1e914: 68,
+    0x1e915: 68,
+    0x1e916: 68,
+    0x1e917: 68,
+    0x1e918: 68,
+    0x1e919: 68,
+    0x1e91a: 68,
+    0x1e91b: 68,
+    0x1e91c: 68,
+    0x1e91d: 68,
+    0x1e91e: 68,
+    0x1e91f: 68,
+    0x1e920: 68,
+    0x1e921: 68,
+    0x1e922: 68,
+    0x1e923: 68,
+    0x1e924: 68,
+    0x1e925: 68,
+    0x1e926: 68,
+    0x1e927: 68,
+    0x1e928: 68,
+    0x1e929: 68,
+    0x1e92a: 68,
+    0x1e92b: 68,
+    0x1e92c: 68,
+    0x1e92d: 68,
+    0x1e92e: 68,
+    0x1e92f: 68,
+    0x1e930: 68,
+    0x1e931: 68,
+    0x1e932: 68,
+    0x1e933: 68,
+    0x1e934: 68,
+    0x1e935: 68,
+    0x1e936: 68,
+    0x1e937: 68,
+    0x1e938: 68,
+    0x1e939: 68,
+    0x1e93a: 68,
+    0x1e93b: 68,
+    0x1e93c: 68,
+    0x1e93d: 68,
+    0x1e93e: 68,
+    0x1e93f: 68,
+    0x1e940: 68,
+    0x1e941: 68,
+    0x1e942: 68,
+    0x1e943: 68,
+    0x1e94b: 84,
+}
+codepoint_classes = {
+    'PVALID': (
+        0x2d0000002e,
+        0x300000003a,
+        0x610000007b,
+        0xdf000000f7,
+        0xf800000100,
+        0x10100000102,
+        0x10300000104,
+        0x10500000106,
+        0x10700000108,
+        0x1090000010a,
+        0x10b0000010c,
+        0x10d0000010e,
+        0x10f00000110,
+        0x11100000112,
+        0x11300000114,
+        0x11500000116,
+        0x11700000118,
+        0x1190000011a,
+        0x11b0000011c,
+        0x11d0000011e,
+        0x11f00000120,
+        0x12100000122,
+        0x12300000124,
+        0x12500000126,
+        0x12700000128,
+        0x1290000012a,
+        0x12b0000012c,
+        0x12d0000012e,
+        0x12f00000130,
+        0x13100000132,
+        0x13500000136,
+        0x13700000139,
+        0x13a0000013b,
+        0x13c0000013d,
+        0x13e0000013f,
+        0x14200000143,
+        0x14400000145,
+        0x14600000147,
+        0x14800000149,
+        0x14b0000014c,
+        0x14d0000014e,
+        0x14f00000150,
+        0x15100000152,
+        0x15300000154,
+        0x15500000156,
+        0x15700000158,
+        0x1590000015a,
+        0x15b0000015c,
+        0x15d0000015e,
+        0x15f00000160,
+        0x16100000162,
+        0x16300000164,
+        0x16500000166,
+        0x16700000168,
+        0x1690000016a,
+        0x16b0000016c,
+        0x16d0000016e,
+        0x16f00000170,
+        0x17100000172,
+        0x17300000174,
+        0x17500000176,
+        0x17700000178,
+        0x17a0000017b,
+        0x17c0000017d,
+        0x17e0000017f,
+        0x18000000181,
+        0x18300000184,
+        0x18500000186,
+        0x18800000189,
+        0x18c0000018e,
+        0x19200000193,
+        0x19500000196,
+        0x1990000019c,
+        0x19e0000019f,
+        0x1a1000001a2,
+        0x1a3000001a4,
+        0x1a5000001a6,
+        0x1a8000001a9,
+        0x1aa000001ac,
+        0x1ad000001ae,
+        0x1b0000001b1,
+        0x1b4000001b5,
+        0x1b6000001b7,
+        0x1b9000001bc,
+        0x1bd000001c4,
+        0x1ce000001cf,
+        0x1d0000001d1,
+        0x1d2000001d3,
+        0x1d4000001d5,
+        0x1d6000001d7,
+        0x1d8000001d9,
+        0x1da000001db,
+        0x1dc000001de,
+        0x1df000001e0,
+        0x1e1000001e2,
+        0x1e3000001e4,
+        0x1e5000001e6,
+        0x1e7000001e8,
+        0x1e9000001ea,
+        0x1eb000001ec,
+        0x1ed000001ee,
+        0x1ef000001f1,
+        0x1f5000001f6,
+        0x1f9000001fa,
+        0x1fb000001fc,
+        0x1fd000001fe,
+        0x1ff00000200,
+        0x20100000202,
+        0x20300000204,
+        0x20500000206,
+        0x20700000208,
+        0x2090000020a,
+        0x20b0000020c,
+        0x20d0000020e,
+        0x20f00000210,
+        0x21100000212,
+        0x21300000214,
+        0x21500000216,
+        0x21700000218,
+        0x2190000021a,
+        0x21b0000021c,
+        0x21d0000021e,
+        0x21f00000220,
+        0x22100000222,
+        0x22300000224,
+        0x22500000226,
+        0x22700000228,
+        0x2290000022a,
+        0x22b0000022c,
+        0x22d0000022e,
+        0x22f00000230,
+        0x23100000232,
+        0x2330000023a,
+        0x23c0000023d,
+        0x23f00000241,
+        0x24200000243,
+        0x24700000248,
+        0x2490000024a,
+        0x24b0000024c,
+        0x24d0000024e,
+        0x24f000002b0,
+        0x2b9000002c2,
+        0x2c6000002d2,
+        0x2ec000002ed,
+        0x2ee000002ef,
+        0x30000000340,
+        0x34200000343,
+        0x3460000034f,
+        0x35000000370,
+        0x37100000372,
+        0x37300000374,
+        0x37700000378,
+        0x37b0000037e,
+        0x39000000391,
+        0x3ac000003cf,
+        0x3d7000003d8,
+        0x3d9000003da,
+        0x3db000003dc,
+        0x3dd000003de,
+        0x3df000003e0,
+        0x3e1000003e2,
+        0x3e3000003e4,
+        0x3e5000003e6,
+        0x3e7000003e8,
+        0x3e9000003ea,
+        0x3eb000003ec,
+        0x3ed000003ee,
+        0x3ef000003f0,
+        0x3f3000003f4,
+        0x3f8000003f9,
+        0x3fb000003fd,
+        0x43000000460,
+        0x46100000462,
+        0x46300000464,
+        0x46500000466,
+        0x46700000468,
+        0x4690000046a,
+        0x46b0000046c,
+        0x46d0000046e,
+        0x46f00000470,
+        0x47100000472,
+        0x47300000474,
+        0x47500000476,
+        0x47700000478,
+        0x4790000047a,
+        0x47b0000047c,
+        0x47d0000047e,
+        0x47f00000480,
+        0x48100000482,
+        0x48300000488,
+        0x48b0000048c,
+        0x48d0000048e,
+        0x48f00000490,
+        0x49100000492,
+        0x49300000494,
+        0x49500000496,
+        0x49700000498,
+        0x4990000049a,
+        0x49b0000049c,
+        0x49d0000049e,
+        0x49f000004a0,
+        0x4a1000004a2,
+        0x4a3000004a4,
+        0x4a5000004a6,
+        0x4a7000004a8,
+        0x4a9000004aa,
+        0x4ab000004ac,
+        0x4ad000004ae,
+        0x4af000004b0,
+        0x4b1000004b2,
+        0x4b3000004b4,
+        0x4b5000004b6,
+        0x4b7000004b8,
+        0x4b9000004ba,
+        0x4bb000004bc,
+        0x4bd000004be,
+        0x4bf000004c0,
+        0x4c2000004c3,
+        0x4c4000004c5,
+        0x4c6000004c7,
+        0x4c8000004c9,
+        0x4ca000004cb,
+        0x4cc000004cd,
+        0x4ce000004d0,
+        0x4d1000004d2,
+        0x4d3000004d4,
+        0x4d5000004d6,
+        0x4d7000004d8,
+        0x4d9000004da,
+        0x4db000004dc,
+        0x4dd000004de,
+        0x4df000004e0,
+        0x4e1000004e2,
+        0x4e3000004e4,
+        0x4e5000004e6,
+        0x4e7000004e8,
+        0x4e9000004ea,
+        0x4eb000004ec,
+        0x4ed000004ee,
+        0x4ef000004f0,
+        0x4f1000004f2,
+        0x4f3000004f4,
+        0x4f5000004f6,
+        0x4f7000004f8,
+        0x4f9000004fa,
+        0x4fb000004fc,
+        0x4fd000004fe,
+        0x4ff00000500,
+        0x50100000502,
+        0x50300000504,
+        0x50500000506,
+        0x50700000508,
+        0x5090000050a,
+        0x50b0000050c,
+        0x50d0000050e,
+        0x50f00000510,
+        0x51100000512,
+        0x51300000514,
+        0x51500000516,
+        0x51700000518,
+        0x5190000051a,
+        0x51b0000051c,
+        0x51d0000051e,
+        0x51f00000520,
+        0x52100000522,
+        0x52300000524,
+        0x52500000526,
+        0x52700000528,
+        0x5290000052a,
+        0x52b0000052c,
+        0x52d0000052e,
+        0x52f00000530,
+        0x5590000055a,
+        0x56000000587,
+        0x58800000589,
+        0x591000005be,
+        0x5bf000005c0,
+        0x5c1000005c3,
+        0x5c4000005c6,
+        0x5c7000005c8,
+        0x5d0000005eb,
+        0x5ef000005f3,
+        0x6100000061b,
+        0x62000000640,
+        0x64100000660,
+        0x66e00000675,
+        0x679000006d4,
+        0x6d5000006dd,
+        0x6df000006e9,
+        0x6ea000006f0,
+        0x6fa00000700,
+        0x7100000074b,
+        0x74d000007b2,
+        0x7c0000007f6,
+        0x7fd000007fe,
+        0x8000000082e,
+        0x8400000085c,
+        0x8600000086b,
+        0x87000000888,
+        0x8890000088f,
+        0x898000008e2,
+        0x8e300000958,
+        0x96000000964,
+        0x96600000970,
+        0x97100000984,
+        0x9850000098d,
+        0x98f00000991,
+        0x993000009a9,
+        0x9aa000009b1,
+        0x9b2000009b3,
+        0x9b6000009ba,
+        0x9bc000009c5,
+        0x9c7000009c9,
+        0x9cb000009cf,
+        0x9d7000009d8,
+        0x9e0000009e4,
+        0x9e6000009f2,
+        0x9fc000009fd,
+        0x9fe000009ff,
+        0xa0100000a04,
+        0xa0500000a0b,
+        0xa0f00000a11,
+        0xa1300000a29,
+        0xa2a00000a31,
+        0xa3200000a33,
+        0xa3500000a36,
+        0xa3800000a3a,
+        0xa3c00000a3d,
+        0xa3e00000a43,
+        0xa4700000a49,
+        0xa4b00000a4e,
+        0xa5100000a52,
+        0xa5c00000a5d,
+        0xa6600000a76,
+        0xa8100000a84,
+        0xa8500000a8e,
+        0xa8f00000a92,
+        0xa9300000aa9,
+        0xaaa00000ab1,
+        0xab200000ab4,
+        0xab500000aba,
+        0xabc00000ac6,
+        0xac700000aca,
+        0xacb00000ace,
+        0xad000000ad1,
+        0xae000000ae4,
+        0xae600000af0,
+        0xaf900000b00,
+        0xb0100000b04,
+        0xb0500000b0d,
+        0xb0f00000b11,
+        0xb1300000b29,
+        0xb2a00000b31,
+        0xb3200000b34,
+        0xb3500000b3a,
+        0xb3c00000b45,
+        0xb4700000b49,
+        0xb4b00000b4e,
+        0xb5500000b58,
+        0xb5f00000b64,
+        0xb6600000b70,
+        0xb7100000b72,
+        0xb8200000b84,
+        0xb8500000b8b,
+        0xb8e00000b91,
+        0xb9200000b96,
+        0xb9900000b9b,
+        0xb9c00000b9d,
+        0xb9e00000ba0,
+        0xba300000ba5,
+        0xba800000bab,
+        0xbae00000bba,
+        0xbbe00000bc3,
+        0xbc600000bc9,
+        0xbca00000bce,
+        0xbd000000bd1,
+        0xbd700000bd8,
+        0xbe600000bf0,
+        0xc0000000c0d,
+        0xc0e00000c11,
+        0xc1200000c29,
+        0xc2a00000c3a,
+        0xc3c00000c45,
+        0xc4600000c49,
+        0xc4a00000c4e,
+        0xc5500000c57,
+        0xc5800000c5b,
+        0xc5d00000c5e,
+        0xc6000000c64,
+        0xc6600000c70,
+        0xc8000000c84,
+        0xc8500000c8d,
+        0xc8e00000c91,
+        0xc9200000ca9,
+        0xcaa00000cb4,
+        0xcb500000cba,
+        0xcbc00000cc5,
+        0xcc600000cc9,
+        0xcca00000cce,
+        0xcd500000cd7,
+        0xcdd00000cdf,
+        0xce000000ce4,
+        0xce600000cf0,
+        0xcf100000cf4,
+        0xd0000000d0d,
+        0xd0e00000d11,
+        0xd1200000d45,
+        0xd4600000d49,
+        0xd4a00000d4f,
+        0xd5400000d58,
+        0xd5f00000d64,
+        0xd6600000d70,
+        0xd7a00000d80,
+        0xd8100000d84,
+        0xd8500000d97,
+        0xd9a00000db2,
+        0xdb300000dbc,
+        0xdbd00000dbe,
+        0xdc000000dc7,
+        0xdca00000dcb,
+        0xdcf00000dd5,
+        0xdd600000dd7,
+        0xdd800000de0,
+        0xde600000df0,
+        0xdf200000df4,
+        0xe0100000e33,
+        0xe3400000e3b,
+        0xe4000000e4f,
+        0xe5000000e5a,
+        0xe8100000e83,
+        0xe8400000e85,
+        0xe8600000e8b,
+        0xe8c00000ea4,
+        0xea500000ea6,
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/intranges.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/intranges.py
new file mode 100644
index 0000000..6a43b04
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/intranges.py
@@ -0,0 +1,54 @@
+"""
+Given a list of integers, made up of (hopefully) a small number of long runs
+of consecutive integers, compute a representation of the form
+((start1, end1), (start2, end2) ...). Then answer the question "was x present
+in the original list?" in time O(log(# runs)).
+"""
+
+import bisect
+from typing import List, Tuple
+
+def intranges_from_list(list_: List[int]) -> Tuple[int, ...]:
+    """Represent a list of integers as a sequence of ranges:
+    ((start_0, end_0), (start_1, end_1), ...), such that the original
+    integers are exactly those x such that start_i <= x < end_i for some i.
+
+    Ranges are encoded as single integers (start << 32 | end), not as tuples.
+    """
+
+    sorted_list = sorted(list_)
+    ranges = []
+    last_write = -1
+    for i in range(len(sorted_list)):
+        if i+1 < len(sorted_list):
+            if sorted_list[i] == sorted_list[i+1]-1:
+                continue
+        current_range = sorted_list[last_write+1:i+1]
+        ranges.append(_encode_range(current_range[0], current_range[-1] + 1))
+        last_write = i
+
+    return tuple(ranges)
+
+def _encode_range(start: int, end: int) -> int:
+    return (start << 32) | end
+
+def _decode_range(r: int) -> Tuple[int, int]:
+    return (r >> 32), (r & ((1 << 32) - 1))
+
+
+def intranges_contain(int_: int, ranges: Tuple[int, ...]) -> bool:
+    """Determine if `int_` falls into one of the ranges in `ranges`."""
+    tuple_ = _encode_range(int_, 0)
+    pos = bisect.bisect_left(ranges, tuple_)
+    # we could be immediately ahead of a tuple (start, end)
+    # with start < int_ <= end
+    if pos > 0:
+        left, right = _decode_range(ranges[pos-1])
+        if left <= int_ < right:
+            return True
+    # or we could be immediately behind a tuple (int_, end)
+    if pos < len(ranges):
+        left, _ = _decode_range(ranges[pos])
+        if left == int_:
+            return True
+    return False
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/package_data.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/package_data.py
new file mode 100644
index 0000000..8501893
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/package_data.py
@@ -0,0 +1,2 @@
+__version__ = '3.4'
+
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/idna/uts46data.py b/venv/lib/python3.9/site-packages/pip/_vendor/idna/uts46data.py
new file mode 100644
index 0000000..186796c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/idna/uts46data.py
@@ -0,0 +1,8600 @@
+# This file is automatically generated by tools/idna-data
+# vim: set fileencoding=utf-8 :
+
+from typing import List, Tuple, Union
+
+
+"""IDNA Mapping Table from UTS46."""
+
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+    (0x2F945, 'M', '眞'),
+    (0x2F946, 'M', '真'),
+    (0x2F948, 'M', '睊'),
+    (0x2F949, 'M', '䀹'),
+    (0x2F94A, 'M', '瞋'),
+    (0x2F94B, 'M', '䁆'),
+    (0x2F94C, 'M', '䂖'),
+    (0x2F94D, 'M', '𥐝'),
+    (0x2F94E, 'M', '硎'),
+    (0x2F94F, 'M', '碌'),
+    (0x2F950, 'M', '磌'),
+    (0x2F951, 'M', '䃣'),
+    (0x2F952, 'M', '𥘦'),
+    (0x2F953, 'M', '祖'),
+    (0x2F954, 'M', '𥚚'),
+    (0x2F955, 'M', '𥛅'),
+    (0x2F956, 'M', '福'),
+    (0x2F957, 'M', '秫'),
+    (0x2F958, 'M', '䄯'),
+    (0x2F959, 'M', '穀'),
+    (0x2F95A, 'M', '穊'),
+    (0x2F95B, 'M', '穏'),
+    (0x2F95C, 'M', '𥥼'),
+    (0x2F95D, 'M', '𥪧'),
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+    (0x2F960, 'M', '䈂'),
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+    (0x2F964, 'M', '䈧'),
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+    (0x2F96C, 'M', '絣'),
+    (0x2F96D, 'M', '䌁'),
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+    (0x2F96F, 'M', '縂'),
+    (0x2F970, 'M', '繅'),
+    (0x2F971, 'M', '䌴'),
+    ]
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+    (0x2F973, 'M', '𦉇'),
+    (0x2F974, 'M', '䍙'),
+    (0x2F975, 'M', '𦋙'),
+    (0x2F976, 'M', '罺'),
+    (0x2F977, 'M', '𦌾'),
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+    (0x2F97C, 'M', '𦔣'),
+    (0x2F97D, 'M', '聠'),
+    (0x2F97E, 'M', '𦖨'),
+    (0x2F97F, 'M', '聰'),
+    (0x2F980, 'M', '𣍟'),
+    (0x2F981, 'M', '䏕'),
+    (0x2F982, 'M', '育'),
+    (0x2F983, 'M', '脃'),
+    (0x2F984, 'M', '䐋'),
+    (0x2F985, 'M', '脾'),
+    (0x2F986, 'M', '媵'),
+    (0x2F987, 'M', '𦞧'),
+    (0x2F988, 'M', '𦞵'),
+    (0x2F989, 'M', '𣎓'),
+    (0x2F98A, 'M', '𣎜'),
+    (0x2F98B, 'M', '舁'),
+    (0x2F98C, 'M', '舄'),
+    (0x2F98D, 'M', '辞'),
+    (0x2F98E, 'M', '䑫'),
+    (0x2F98F, 'M', '芑'),
+    (0x2F990, 'M', '芋'),
+    (0x2F991, 'M', '芝'),
+    (0x2F992, 'M', '劳'),
+    (0x2F993, 'M', '花'),
+    (0x2F994, 'M', '芳'),
+    (0x2F995, 'M', '芽'),
+    (0x2F996, 'M', '苦'),
+    (0x2F997, 'M', '𦬼'),
+    (0x2F998, 'M', '若'),
+    (0x2F999, 'M', '茝'),
+    (0x2F99A, 'M', '荣'),
+    (0x2F99B, 'M', '莭'),
+    (0x2F99C, 'M', '茣'),
+    (0x2F99D, 'M', '莽'),
+    (0x2F99E, 'M', '菧'),
+    (0x2F99F, 'M', '著'),
+    (0x2F9A0, 'M', '荓'),
+    (0x2F9A1, 'M', '菊'),
+    (0x2F9A2, 'M', '菌'),
+    (0x2F9A3, 'M', '菜'),
+    (0x2F9A4, 'M', '𦰶'),
+    (0x2F9A5, 'M', '𦵫'),
+    (0x2F9A6, 'M', '𦳕'),
+    (0x2F9A7, 'M', '䔫'),
+    (0x2F9A8, 'M', '蓱'),
+    (0x2F9A9, 'M', '蓳'),
+    (0x2F9AA, 'M', '蔖'),
+    (0x2F9AB, 'M', '𧏊'),
+    (0x2F9AC, 'M', '蕤'),
+    (0x2F9AD, 'M', '𦼬'),
+    (0x2F9AE, 'M', '䕝'),
+    (0x2F9AF, 'M', '䕡'),
+    (0x2F9B0, 'M', '𦾱'),
+    (0x2F9B1, 'M', '𧃒'),
+    (0x2F9B2, 'M', '䕫'),
+    (0x2F9B3, 'M', '虐'),
+    (0x2F9B4, 'M', '虜'),
+    (0x2F9B5, 'M', '虧'),
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+    (0x2F9BB, 'M', '蝹'),
+    (0x2F9BC, 'M', '蜨'),
+    (0x2F9BD, 'M', '蝫'),
+    (0x2F9BE, 'M', '螆'),
+    (0x2F9BF, 'X'),
+    (0x2F9C0, 'M', '蟡'),
+    (0x2F9C1, 'M', '蠁'),
+    (0x2F9C2, 'M', '䗹'),
+    (0x2F9C3, 'M', '衠'),
+    (0x2F9C4, 'M', '衣'),
+    (0x2F9C5, 'M', '𧙧'),
+    (0x2F9C6, 'M', '裗'),
+    (0x2F9C7, 'M', '裞'),
+    (0x2F9C8, 'M', '䘵'),
+    (0x2F9C9, 'M', '裺'),
+    (0x2F9CA, 'M', '㒻'),
+    (0x2F9CB, 'M', '𧢮'),
+    (0x2F9CC, 'M', '𧥦'),
+    (0x2F9CD, 'M', '䚾'),
+    (0x2F9CE, 'M', '䛇'),
+    (0x2F9CF, 'M', '誠'),
+    (0x2F9D0, 'M', '諭'),
+    (0x2F9D1, 'M', '變'),
+    (0x2F9D2, 'M', '豕'),
+    (0x2F9D3, 'M', '𧲨'),
+    (0x2F9D4, 'M', '貫'),
+    (0x2F9D5, 'M', '賁'),
+    ]
+
+def _seg_81() -> List[Union[Tuple[int, str], Tuple[int, str, str]]]:
+    return [
+    (0x2F9D6, 'M', '贛'),
+    (0x2F9D7, 'M', '起'),
+    (0x2F9D8, 'M', '𧼯'),
+    (0x2F9D9, 'M', '𠠄'),
+    (0x2F9DA, 'M', '跋'),
+    (0x2F9DB, 'M', '趼'),
+    (0x2F9DC, 'M', '跰'),
+    (0x2F9DD, 'M', '𠣞'),
+    (0x2F9DE, 'M', '軔'),
+    (0x2F9DF, 'M', '輸'),
+    (0x2F9E0, 'M', '𨗒'),
+    (0x2F9E1, 'M', '𨗭'),
+    (0x2F9E2, 'M', '邔'),
+    (0x2F9E3, 'M', '郱'),
+    (0x2F9E4, 'M', '鄑'),
+    (0x2F9E5, 'M', '𨜮'),
+    (0x2F9E6, 'M', '鄛'),
+    (0x2F9E7, 'M', '鈸'),
+    (0x2F9E8, 'M', '鋗'),
+    (0x2F9E9, 'M', '鋘'),
+    (0x2F9EA, 'M', '鉼'),
+    (0x2F9EB, 'M', '鏹'),
+    (0x2F9EC, 'M', '鐕'),
+    (0x2F9ED, 'M', '𨯺'),
+    (0x2F9EE, 'M', '開'),
+    (0x2F9EF, 'M', '䦕'),
+    (0x2F9F0, 'M', '閷'),
+    (0x2F9F1, 'M', '𨵷'),
+    (0x2F9F2, 'M', '䧦'),
+    (0x2F9F3, 'M', '雃'),
+    (0x2F9F4, 'M', '嶲'),
+    (0x2F9F5, 'M', '霣'),
+    (0x2F9F6, 'M', '𩅅'),
+    (0x2F9F7, 'M', '𩈚'),
+    (0x2F9F8, 'M', '䩮'),
+    (0x2F9F9, 'M', '䩶'),
+    (0x2F9FA, 'M', '韠'),
+    (0x2F9FB, 'M', '𩐊'),
+    (0x2F9FC, 'M', '䪲'),
+    (0x2F9FD, 'M', '𩒖'),
+    (0x2F9FE, 'M', '頋'),
+    (0x2FA00, 'M', '頩'),
+    (0x2FA01, 'M', '𩖶'),
+    (0x2FA02, 'M', '飢'),
+    (0x2FA03, 'M', '䬳'),
+    (0x2FA04, 'M', '餩'),
+    (0x2FA05, 'M', '馧'),
+    (0x2FA06, 'M', '駂'),
+    (0x2FA07, 'M', '駾'),
+    (0x2FA08, 'M', '䯎'),
+    (0x2FA09, 'M', '𩬰'),
+    (0x2FA0A, 'M', '鬒'),
+    (0x2FA0B, 'M', '鱀'),
+    (0x2FA0C, 'M', '鳽'),
+    (0x2FA0D, 'M', '䳎'),
+    (0x2FA0E, 'M', '䳭'),
+    (0x2FA0F, 'M', '鵧'),
+    (0x2FA10, 'M', '𪃎'),
+    (0x2FA11, 'M', '䳸'),
+    (0x2FA12, 'M', '𪄅'),
+    (0x2FA13, 'M', '𪈎'),
+    (0x2FA14, 'M', '𪊑'),
+    (0x2FA15, 'M', '麻'),
+    (0x2FA16, 'M', '䵖'),
+    (0x2FA17, 'M', '黹'),
+    (0x2FA18, 'M', '黾'),
+    (0x2FA19, 'M', '鼅'),
+    (0x2FA1A, 'M', '鼏'),
+    (0x2FA1B, 'M', '鼖'),
+    (0x2FA1C, 'M', '鼻'),
+    (0x2FA1D, 'M', '𪘀'),
+    (0x2FA1E, 'X'),
+    (0x30000, 'V'),
+    (0x3134B, 'X'),
+    (0x31350, 'V'),
+    (0x323B0, 'X'),
+    (0xE0100, 'I'),
+    (0xE01F0, 'X'),
+    ]
+
+uts46data = tuple(
+    _seg_0()
+    + _seg_1()
+    + _seg_2()
+    + _seg_3()
+    + _seg_4()
+    + _seg_5()
+    + _seg_6()
+    + _seg_7()
+    + _seg_8()
+    + _seg_9()
+    + _seg_10()
+    + _seg_11()
+    + _seg_12()
+    + _seg_13()
+    + _seg_14()
+    + _seg_15()
+    + _seg_16()
+    + _seg_17()
+    + _seg_18()
+    + _seg_19()
+    + _seg_20()
+    + _seg_21()
+    + _seg_22()
+    + _seg_23()
+    + _seg_24()
+    + _seg_25()
+    + _seg_26()
+    + _seg_27()
+    + _seg_28()
+    + _seg_29()
+    + _seg_30()
+    + _seg_31()
+    + _seg_32()
+    + _seg_33()
+    + _seg_34()
+    + _seg_35()
+    + _seg_36()
+    + _seg_37()
+    + _seg_38()
+    + _seg_39()
+    + _seg_40()
+    + _seg_41()
+    + _seg_42()
+    + _seg_43()
+    + _seg_44()
+    + _seg_45()
+    + _seg_46()
+    + _seg_47()
+    + _seg_48()
+    + _seg_49()
+    + _seg_50()
+    + _seg_51()
+    + _seg_52()
+    + _seg_53()
+    + _seg_54()
+    + _seg_55()
+    + _seg_56()
+    + _seg_57()
+    + _seg_58()
+    + _seg_59()
+    + _seg_60()
+    + _seg_61()
+    + _seg_62()
+    + _seg_63()
+    + _seg_64()
+    + _seg_65()
+    + _seg_66()
+    + _seg_67()
+    + _seg_68()
+    + _seg_69()
+    + _seg_70()
+    + _seg_71()
+    + _seg_72()
+    + _seg_73()
+    + _seg_74()
+    + _seg_75()
+    + _seg_76()
+    + _seg_77()
+    + _seg_78()
+    + _seg_79()
+    + _seg_80()
+    + _seg_81()
+)  # type: Tuple[Union[Tuple[int, str], Tuple[int, str, str]], ...]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__init__.py
new file mode 100644
index 0000000..5071021
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__init__.py
@@ -0,0 +1,57 @@
+# coding: utf-8
+from .exceptions import *
+from .ext import ExtType, Timestamp
+
+import os
+import sys
+
+
+version = (1, 0, 4)
+__version__ = "1.0.4"
+
+
+if os.environ.get("MSGPACK_PUREPYTHON") or sys.version_info[0] == 2:
+    from .fallback import Packer, unpackb, Unpacker
+else:
+    try:
+        from ._cmsgpack import Packer, unpackb, Unpacker
+    except ImportError:
+        from .fallback import Packer, unpackb, Unpacker
+
+
+def pack(o, stream, **kwargs):
+    """
+    Pack object `o` and write it to `stream`
+
+    See :class:`Packer` for options.
+    """
+    packer = Packer(**kwargs)
+    stream.write(packer.pack(o))
+
+
+def packb(o, **kwargs):
+    """
+    Pack object `o` and return packed bytes
+
+    See :class:`Packer` for options.
+    """
+    return Packer(**kwargs).pack(o)
+
+
+def unpack(stream, **kwargs):
+    """
+    Unpack an object from `stream`.
+
+    Raises `ExtraData` when `stream` contains extra bytes.
+    See :class:`Unpacker` for options.
+    """
+    data = stream.read()
+    return unpackb(data, **kwargs)
+
+
+# alias for compatibility to simplejson/marshal/pickle.
+load = unpack
+loads = unpackb
+
+dump = pack
+dumps = packb
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..d570e10
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-39.pyc
new file mode 100644
index 0000000..c10c30d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/exceptions.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/ext.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/ext.cpython-39.pyc
new file mode 100644
index 0000000..a768505
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/ext.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-39.pyc
new file mode 100644
index 0000000..2fe83c6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/__pycache__/fallback.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/exceptions.py b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/exceptions.py
new file mode 100644
index 0000000..d6d2615
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/exceptions.py
@@ -0,0 +1,48 @@
+class UnpackException(Exception):
+    """Base class for some exceptions raised while unpacking.
+
+    NOTE: unpack may raise exception other than subclass of
+    UnpackException.  If you want to catch all error, catch
+    Exception instead.
+    """
+
+
+class BufferFull(UnpackException):
+    pass
+
+
+class OutOfData(UnpackException):
+    pass
+
+
+class FormatError(ValueError, UnpackException):
+    """Invalid msgpack format"""
+
+
+class StackError(ValueError, UnpackException):
+    """Too nested"""
+
+
+# Deprecated.  Use ValueError instead
+UnpackValueError = ValueError
+
+
+class ExtraData(UnpackValueError):
+    """ExtraData is raised when there is trailing data.
+
+    This exception is raised while only one-shot (not streaming)
+    unpack.
+    """
+
+    def __init__(self, unpacked, extra):
+        self.unpacked = unpacked
+        self.extra = extra
+
+    def __str__(self):
+        return "unpack(b) received extra data."
+
+
+# Deprecated.  Use Exception instead to catch all exception during packing.
+PackException = Exception
+PackValueError = ValueError
+PackOverflowError = OverflowError
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/ext.py b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/ext.py
new file mode 100644
index 0000000..25544c5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/ext.py
@@ -0,0 +1,193 @@
+# coding: utf-8
+from collections import namedtuple
+import datetime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+
+if PY2:
+    int_types = (int, long)
+    _utc = None
+else:
+    int_types = int
+    try:
+        _utc = datetime.timezone.utc
+    except AttributeError:
+        _utc = datetime.timezone(datetime.timedelta(0))
+
+
+class ExtType(namedtuple("ExtType", "code data")):
+    """ExtType represents ext type in msgpack."""
+
+    def __new__(cls, code, data):
+        if not isinstance(code, int):
+            raise TypeError("code must be int")
+        if not isinstance(data, bytes):
+            raise TypeError("data must be bytes")
+        if not 0 <= code <= 127:
+            raise ValueError("code must be 0~127")
+        return super(ExtType, cls).__new__(cls, code, data)
+
+
+class Timestamp(object):
+    """Timestamp represents the Timestamp extension type in msgpack.
+
+    When built with Cython, msgpack uses C methods to pack and unpack `Timestamp`. When using pure-Python
+    msgpack, :func:`to_bytes` and :func:`from_bytes` are used to pack and unpack `Timestamp`.
+
+    This class is immutable: Do not override seconds and nanoseconds.
+    """
+
+    __slots__ = ["seconds", "nanoseconds"]
+
+    def __init__(self, seconds, nanoseconds=0):
+        """Initialize a Timestamp object.
+
+        :param int seconds:
+            Number of seconds since the UNIX epoch (00:00:00 UTC Jan 1 1970, minus leap seconds).
+            May be negative.
+
+        :param int nanoseconds:
+            Number of nanoseconds to add to `seconds` to get fractional time.
+            Maximum is 999_999_999.  Default is 0.
+
+        Note: Negative times (before the UNIX epoch) are represented as negative seconds + positive ns.
+        """
+        if not isinstance(seconds, int_types):
+            raise TypeError("seconds must be an interger")
+        if not isinstance(nanoseconds, int_types):
+            raise TypeError("nanoseconds must be an integer")
+        if not (0 <= nanoseconds < 10**9):
+            raise ValueError(
+                "nanoseconds must be a non-negative integer less than 999999999."
+            )
+        self.seconds = seconds
+        self.nanoseconds = nanoseconds
+
+    def __repr__(self):
+        """String representation of Timestamp."""
+        return "Timestamp(seconds={0}, nanoseconds={1})".format(
+            self.seconds, self.nanoseconds
+        )
+
+    def __eq__(self, other):
+        """Check for equality with another Timestamp object"""
+        if type(other) is self.__class__:
+            return (
+                self.seconds == other.seconds and self.nanoseconds == other.nanoseconds
+            )
+        return False
+
+    def __ne__(self, other):
+        """not-equals method (see :func:`__eq__()`)"""
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return hash((self.seconds, self.nanoseconds))
+
+    @staticmethod
+    def from_bytes(b):
+        """Unpack bytes into a `Timestamp` object.
+
+        Used for pure-Python msgpack unpacking.
+
+        :param b: Payload from msgpack ext message with code -1
+        :type b: bytes
+
+        :returns: Timestamp object unpacked from msgpack ext payload
+        :rtype: Timestamp
+        """
+        if len(b) == 4:
+            seconds = struct.unpack("!L", b)[0]
+            nanoseconds = 0
+        elif len(b) == 8:
+            data64 = struct.unpack("!Q", b)[0]
+            seconds = data64 & 0x00000003FFFFFFFF
+            nanoseconds = data64 >> 34
+        elif len(b) == 12:
+            nanoseconds, seconds = struct.unpack("!Iq", b)
+        else:
+            raise ValueError(
+                "Timestamp type can only be created from 32, 64, or 96-bit byte objects"
+            )
+        return Timestamp(seconds, nanoseconds)
+
+    def to_bytes(self):
+        """Pack this Timestamp object into bytes.
+
+        Used for pure-Python msgpack packing.
+
+        :returns data: Payload for EXT message with code -1 (timestamp type)
+        :rtype: bytes
+        """
+        if (self.seconds >> 34) == 0:  # seconds is non-negative and fits in 34 bits
+            data64 = self.nanoseconds << 34 | self.seconds
+            if data64 & 0xFFFFFFFF00000000 == 0:
+                # nanoseconds is zero and seconds < 2**32, so timestamp 32
+                data = struct.pack("!L", data64)
+            else:
+                # timestamp 64
+                data = struct.pack("!Q", data64)
+        else:
+            # timestamp 96
+            data = struct.pack("!Iq", self.nanoseconds, self.seconds)
+        return data
+
+    @staticmethod
+    def from_unix(unix_sec):
+        """Create a Timestamp from posix timestamp in seconds.
+
+        :param unix_float: Posix timestamp in seconds.
+        :type unix_float: int or float.
+        """
+        seconds = int(unix_sec // 1)
+        nanoseconds = int((unix_sec % 1) * 10**9)
+        return Timestamp(seconds, nanoseconds)
+
+    def to_unix(self):
+        """Get the timestamp as a floating-point value.
+
+        :returns: posix timestamp
+        :rtype: float
+        """
+        return self.seconds + self.nanoseconds / 1e9
+
+    @staticmethod
+    def from_unix_nano(unix_ns):
+        """Create a Timestamp from posix timestamp in nanoseconds.
+
+        :param int unix_ns: Posix timestamp in nanoseconds.
+        :rtype: Timestamp
+        """
+        return Timestamp(*divmod(unix_ns, 10**9))
+
+    def to_unix_nano(self):
+        """Get the timestamp as a unixtime in nanoseconds.
+
+        :returns: posix timestamp in nanoseconds
+        :rtype: int
+        """
+        return self.seconds * 10**9 + self.nanoseconds
+
+    def to_datetime(self):
+        """Get the timestamp as a UTC datetime.
+
+        Python 2 is not supported.
+
+        :rtype: datetime.
+        """
+        return datetime.datetime.fromtimestamp(0, _utc) + datetime.timedelta(
+            seconds=self.to_unix()
+        )
+
+    @staticmethod
+    def from_datetime(dt):
+        """Create a Timestamp from datetime with tzinfo.
+
+        Python 2 is not supported.
+
+        :rtype: Timestamp
+        """
+        return Timestamp.from_unix(dt.timestamp())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/fallback.py b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/fallback.py
new file mode 100644
index 0000000..f560c7b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/msgpack/fallback.py
@@ -0,0 +1,1010 @@
+"""Fallback pure Python implementation of msgpack"""
+from datetime import datetime as _DateTime
+import sys
+import struct
+
+
+PY2 = sys.version_info[0] == 2
+if PY2:
+    int_types = (int, long)
+
+    def dict_iteritems(d):
+        return d.iteritems()
+
+else:
+    int_types = int
+    unicode = str
+    xrange = range
+
+    def dict_iteritems(d):
+        return d.items()
+
+
+if sys.version_info < (3, 5):
+    # Ugly hack...
+    RecursionError = RuntimeError
+
+    def _is_recursionerror(e):
+        return (
+            len(e.args) == 1
+            and isinstance(e.args[0], str)
+            and e.args[0].startswith("maximum recursion depth exceeded")
+        )
+
+else:
+
+    def _is_recursionerror(e):
+        return True
+
+
+if hasattr(sys, "pypy_version_info"):
+    # StringIO is slow on PyPy, StringIO is faster.  However: PyPy's own
+    # StringBuilder is fastest.
+    from __pypy__ import newlist_hint
+
+    try:
+        from __pypy__.builders import BytesBuilder as StringBuilder
+    except ImportError:
+        from __pypy__.builders import StringBuilder
+    USING_STRINGBUILDER = True
+
+    class StringIO(object):
+        def __init__(self, s=b""):
+            if s:
+                self.builder = StringBuilder(len(s))
+                self.builder.append(s)
+            else:
+                self.builder = StringBuilder()
+
+        def write(self, s):
+            if isinstance(s, memoryview):
+                s = s.tobytes()
+            elif isinstance(s, bytearray):
+                s = bytes(s)
+            self.builder.append(s)
+
+        def getvalue(self):
+            return self.builder.build()
+
+else:
+    USING_STRINGBUILDER = False
+    from io import BytesIO as StringIO
+
+    newlist_hint = lambda size: []
+
+
+from .exceptions import BufferFull, OutOfData, ExtraData, FormatError, StackError
+
+from .ext import ExtType, Timestamp
+
+
+EX_SKIP = 0
+EX_CONSTRUCT = 1
+EX_READ_ARRAY_HEADER = 2
+EX_READ_MAP_HEADER = 3
+
+TYPE_IMMEDIATE = 0
+TYPE_ARRAY = 1
+TYPE_MAP = 2
+TYPE_RAW = 3
+TYPE_BIN = 4
+TYPE_EXT = 5
+
+DEFAULT_RECURSE_LIMIT = 511
+
+
+def _check_type_strict(obj, t, type=type, tuple=tuple):
+    if type(t) is tuple:
+        return type(obj) in t
+    else:
+        return type(obj) is t
+
+
+def _get_data_from_buffer(obj):
+    view = memoryview(obj)
+    if view.itemsize != 1:
+        raise ValueError("cannot unpack from multi-byte object")
+    return view
+
+
+def unpackb(packed, **kwargs):
+    """
+    Unpack an object from `packed`.
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``ValueError`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+
+    See :class:`Unpacker` for options.
+    """
+    unpacker = Unpacker(None, max_buffer_size=len(packed), **kwargs)
+    unpacker.feed(packed)
+    try:
+        ret = unpacker._unpack()
+    except OutOfData:
+        raise ValueError("Unpack failed: incomplete input")
+    except RecursionError as e:
+        if _is_recursionerror(e):
+            raise StackError
+        raise
+    if unpacker._got_extradata():
+        raise ExtraData(ret, unpacker._get_extradata())
+    return ret
+
+
+if sys.version_info < (2, 7, 6):
+
+    def _unpack_from(f, b, o=0):
+        """Explicit type cast for legacy struct.unpack_from"""
+        return struct.unpack_from(f, bytes(b), o)
+
+else:
+    _unpack_from = struct.unpack_from
+
+_NO_FORMAT_USED = ""
+_MSGPACK_HEADERS = {
+    0xC4: (1, _NO_FORMAT_USED, TYPE_BIN),
+    0xC5: (2, ">H", TYPE_BIN),
+    0xC6: (4, ">I", TYPE_BIN),
+    0xC7: (2, "Bb", TYPE_EXT),
+    0xC8: (3, ">Hb", TYPE_EXT),
+    0xC9: (5, ">Ib", TYPE_EXT),
+    0xCA: (4, ">f"),
+    0xCB: (8, ">d"),
+    0xCC: (1, _NO_FORMAT_USED),
+    0xCD: (2, ">H"),
+    0xCE: (4, ">I"),
+    0xCF: (8, ">Q"),
+    0xD0: (1, "b"),
+    0xD1: (2, ">h"),
+    0xD2: (4, ">i"),
+    0xD3: (8, ">q"),
+    0xD4: (1, "b1s", TYPE_EXT),
+    0xD5: (2, "b2s", TYPE_EXT),
+    0xD6: (4, "b4s", TYPE_EXT),
+    0xD7: (8, "b8s", TYPE_EXT),
+    0xD8: (16, "b16s", TYPE_EXT),
+    0xD9: (1, _NO_FORMAT_USED, TYPE_RAW),
+    0xDA: (2, ">H", TYPE_RAW),
+    0xDB: (4, ">I", TYPE_RAW),
+    0xDC: (2, ">H", TYPE_ARRAY),
+    0xDD: (4, ">I", TYPE_ARRAY),
+    0xDE: (2, ">H", TYPE_MAP),
+    0xDF: (4, ">I", TYPE_MAP),
+}
+
+
+class Unpacker(object):
+    """Streaming unpacker.
+
+    Arguments:
+
+    :param file_like:
+        File-like object having `.read(n)` method.
+        If specified, unpacker reads serialized data from it and :meth:`feed()` is not usable.
+
+    :param int read_size:
+        Used as `file_like.read(read_size)`. (default: `min(16*1024, max_buffer_size)`)
+
+    :param bool use_list:
+        If true, unpack msgpack array to Python list.
+        Otherwise, unpack to Python tuple. (default: True)
+
+    :param bool raw:
+        If true, unpack msgpack raw to Python bytes.
+        Otherwise, unpack to Python str by decoding with UTF-8 encoding (default).
+
+    :param int timestamp:
+        Control how timestamp type is unpacked:
+
+            0 - Timestamp
+            1 - float  (Seconds from the EPOCH)
+            2 - int  (Nanoseconds from the EPOCH)
+            3 - datetime.datetime  (UTC).  Python 2 is not supported.
+
+    :param bool strict_map_key:
+        If true (default), only str or bytes are accepted for map (dict) keys.
+
+    :param callable object_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a dict argument after unpacking msgpack map.
+        (See also simplejson)
+
+    :param callable object_pairs_hook:
+        When specified, it should be callable.
+        Unpacker calls it with a list of key-value pairs after unpacking msgpack map.
+        (See also simplejson)
+
+    :param str unicode_errors:
+        The error handler for decoding unicode. (default: 'strict')
+        This option should be used only when you have msgpack data which
+        contains invalid UTF-8 string.
+
+    :param int max_buffer_size:
+        Limits size of data waiting unpacked.  0 means 2**32-1.
+        The default value is 100*1024*1024 (100MiB).
+        Raises `BufferFull` exception when it is insufficient.
+        You should set this parameter when unpacking data from untrusted source.
+
+    :param int max_str_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of str. (default: max_buffer_size)
+
+    :param int max_bin_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max length of bin. (default: max_buffer_size)
+
+    :param int max_array_len:
+        Limits max length of array.
+        (default: max_buffer_size)
+
+    :param int max_map_len:
+        Limits max length of map.
+        (default: max_buffer_size//2)
+
+    :param int max_ext_len:
+        Deprecated, use *max_buffer_size* instead.
+        Limits max size of ext type.  (default: max_buffer_size)
+
+    Example of streaming deserialize from file-like object::
+
+        unpacker = Unpacker(file_like)
+        for o in unpacker:
+            process(o)
+
+    Example of streaming deserialize from socket::
+
+        unpacker = Unpacker()
+        while True:
+            buf = sock.recv(1024**2)
+            if not buf:
+                break
+            unpacker.feed(buf)
+            for o in unpacker:
+                process(o)
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``OutOfData`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+    """
+
+    def __init__(
+        self,
+        file_like=None,
+        read_size=0,
+        use_list=True,
+        raw=False,
+        timestamp=0,
+        strict_map_key=True,
+        object_hook=None,
+        object_pairs_hook=None,
+        list_hook=None,
+        unicode_errors=None,
+        max_buffer_size=100 * 1024 * 1024,
+        ext_hook=ExtType,
+        max_str_len=-1,
+        max_bin_len=-1,
+        max_array_len=-1,
+        max_map_len=-1,
+        max_ext_len=-1,
+    ):
+        if unicode_errors is None:
+            unicode_errors = "strict"
+
+        if file_like is None:
+            self._feeding = True
+        else:
+            if not callable(file_like.read):
+                raise TypeError("`file_like.read` must be callable")
+            self.file_like = file_like
+            self._feeding = False
+
+        #: array of bytes fed.
+        self._buffer = bytearray()
+        #: Which position we currently reads
+        self._buff_i = 0
+
+        # When Unpacker is used as an iterable, between the calls to next(),
+        # the buffer is not "consumed" completely, for efficiency sake.
+        # Instead, it is done sloppily.  To make sure we raise BufferFull at
+        # the correct moments, we have to keep track of how sloppy we were.
+        # Furthermore, when the buffer is incomplete (that is: in the case
+        # we raise an OutOfData) we need to rollback the buffer to the correct
+        # state, which _buf_checkpoint records.
+        self._buf_checkpoint = 0
+
+        if not max_buffer_size:
+            max_buffer_size = 2**31 - 1
+        if max_str_len == -1:
+            max_str_len = max_buffer_size
+        if max_bin_len == -1:
+            max_bin_len = max_buffer_size
+        if max_array_len == -1:
+            max_array_len = max_buffer_size
+        if max_map_len == -1:
+            max_map_len = max_buffer_size // 2
+        if max_ext_len == -1:
+            max_ext_len = max_buffer_size
+
+        self._max_buffer_size = max_buffer_size
+        if read_size > self._max_buffer_size:
+            raise ValueError("read_size must be smaller than max_buffer_size")
+        self._read_size = read_size or min(self._max_buffer_size, 16 * 1024)
+        self._raw = bool(raw)
+        self._strict_map_key = bool(strict_map_key)
+        self._unicode_errors = unicode_errors
+        self._use_list = use_list
+        if not (0 <= timestamp <= 3):
+            raise ValueError("timestamp must be 0..3")
+        self._timestamp = timestamp
+        self._list_hook = list_hook
+        self._object_hook = object_hook
+        self._object_pairs_hook = object_pairs_hook
+        self._ext_hook = ext_hook
+        self._max_str_len = max_str_len
+        self._max_bin_len = max_bin_len
+        self._max_array_len = max_array_len
+        self._max_map_len = max_map_len
+        self._max_ext_len = max_ext_len
+        self._stream_offset = 0
+
+        if list_hook is not None and not callable(list_hook):
+            raise TypeError("`list_hook` is not callable")
+        if object_hook is not None and not callable(object_hook):
+            raise TypeError("`object_hook` is not callable")
+        if object_pairs_hook is not None and not callable(object_pairs_hook):
+            raise TypeError("`object_pairs_hook` is not callable")
+        if object_hook is not None and object_pairs_hook is not None:
+            raise TypeError(
+                "object_pairs_hook and object_hook are mutually " "exclusive"
+            )
+        if not callable(ext_hook):
+            raise TypeError("`ext_hook` is not callable")
+
+    def feed(self, next_bytes):
+        assert self._feeding
+        view = _get_data_from_buffer(next_bytes)
+        if len(self._buffer) - self._buff_i + len(view) > self._max_buffer_size:
+            raise BufferFull
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Use extend here: INPLACE_ADD += doesn't reliably typecast memoryview in jython
+        self._buffer.extend(view)
+
+    def _consume(self):
+        """Gets rid of the used parts of the buffer."""
+        self._stream_offset += self._buff_i - self._buf_checkpoint
+        self._buf_checkpoint = self._buff_i
+
+    def _got_extradata(self):
+        return self._buff_i < len(self._buffer)
+
+    def _get_extradata(self):
+        return self._buffer[self._buff_i :]
+
+    def read_bytes(self, n):
+        ret = self._read(n, raise_outofdata=False)
+        self._consume()
+        return ret
+
+    def _read(self, n, raise_outofdata=True):
+        # (int) -> bytearray
+        self._reserve(n, raise_outofdata=raise_outofdata)
+        i = self._buff_i
+        ret = self._buffer[i : i + n]
+        self._buff_i = i + len(ret)
+        return ret
+
+    def _reserve(self, n, raise_outofdata=True):
+        remain_bytes = len(self._buffer) - self._buff_i - n
+
+        # Fast path: buffer has n bytes already
+        if remain_bytes >= 0:
+            return
+
+        if self._feeding:
+            self._buff_i = self._buf_checkpoint
+            raise OutOfData
+
+        # Strip buffer before checkpoint before reading file.
+        if self._buf_checkpoint > 0:
+            del self._buffer[: self._buf_checkpoint]
+            self._buff_i -= self._buf_checkpoint
+            self._buf_checkpoint = 0
+
+        # Read from file
+        remain_bytes = -remain_bytes
+        if remain_bytes + len(self._buffer) > self._max_buffer_size:
+            raise BufferFull
+        while remain_bytes > 0:
+            to_read_bytes = max(self._read_size, remain_bytes)
+            read_data = self.file_like.read(to_read_bytes)
+            if not read_data:
+                break
+            assert isinstance(read_data, bytes)
+            self._buffer += read_data
+            remain_bytes -= len(read_data)
+
+        if len(self._buffer) < n + self._buff_i and raise_outofdata:
+            self._buff_i = 0  # rollback
+            raise OutOfData
+
+    def _read_header(self):
+        typ = TYPE_IMMEDIATE
+        n = 0
+        obj = None
+        self._reserve(1)
+        b = self._buffer[self._buff_i]
+        self._buff_i += 1
+        if b & 0b10000000 == 0:
+            obj = b
+        elif b & 0b11100000 == 0b11100000:
+            obj = -1 - (b ^ 0xFF)
+        elif b & 0b11100000 == 0b10100000:
+            n = b & 0b00011111
+            typ = TYPE_RAW
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)" % (n, self._max_str_len))
+            obj = self._read(n)
+        elif b & 0b11110000 == 0b10010000:
+            n = b & 0b00001111
+            typ = TYPE_ARRAY
+            if n > self._max_array_len:
+                raise ValueError(
+                    "%s exceeds max_array_len(%s)" % (n, self._max_array_len)
+                )
+        elif b & 0b11110000 == 0b10000000:
+            n = b & 0b00001111
+            typ = TYPE_MAP
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)" % (n, self._max_map_len))
+        elif b == 0xC0:
+            obj = None
+        elif b == 0xC2:
+            obj = False
+        elif b == 0xC3:
+            obj = True
+        elif 0xC4 <= b <= 0xC6:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            if len(fmt) > 0:
+                n = _unpack_from(fmt, self._buffer, self._buff_i)[0]
+            else:
+                n = self._buffer[self._buff_i]
+            self._buff_i += size
+            if n > self._max_bin_len:
+                raise ValueError("%s exceeds max_bin_len(%s)" % (n, self._max_bin_len))
+            obj = self._read(n)
+        elif 0xC7 <= b <= 0xC9:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            L, n = _unpack_from(fmt, self._buffer, self._buff_i)
+            self._buff_i += size
+            if L > self._max_ext_len:
+                raise ValueError("%s exceeds max_ext_len(%s)" % (L, self._max_ext_len))
+            obj = self._read(L)
+        elif 0xCA <= b <= 0xD3:
+            size, fmt = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            if len(fmt) > 0:
+                obj = _unpack_from(fmt, self._buffer, self._buff_i)[0]
+            else:
+                obj = self._buffer[self._buff_i]
+            self._buff_i += size
+        elif 0xD4 <= b <= 0xD8:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            if self._max_ext_len < size:
+                raise ValueError(
+                    "%s exceeds max_ext_len(%s)" % (size, self._max_ext_len)
+                )
+            self._reserve(size + 1)
+            n, obj = _unpack_from(fmt, self._buffer, self._buff_i)
+            self._buff_i += size + 1
+        elif 0xD9 <= b <= 0xDB:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            if len(fmt) > 0:
+                (n,) = _unpack_from(fmt, self._buffer, self._buff_i)
+            else:
+                n = self._buffer[self._buff_i]
+            self._buff_i += size
+            if n > self._max_str_len:
+                raise ValueError("%s exceeds max_str_len(%s)" % (n, self._max_str_len))
+            obj = self._read(n)
+        elif 0xDC <= b <= 0xDD:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            (n,) = _unpack_from(fmt, self._buffer, self._buff_i)
+            self._buff_i += size
+            if n > self._max_array_len:
+                raise ValueError(
+                    "%s exceeds max_array_len(%s)" % (n, self._max_array_len)
+                )
+        elif 0xDE <= b <= 0xDF:
+            size, fmt, typ = _MSGPACK_HEADERS[b]
+            self._reserve(size)
+            (n,) = _unpack_from(fmt, self._buffer, self._buff_i)
+            self._buff_i += size
+            if n > self._max_map_len:
+                raise ValueError("%s exceeds max_map_len(%s)" % (n, self._max_map_len))
+        else:
+            raise FormatError("Unknown header: 0x%x" % b)
+        return typ, n, obj
+
+    def _unpack(self, execute=EX_CONSTRUCT):
+        typ, n, obj = self._read_header()
+
+        if execute == EX_READ_ARRAY_HEADER:
+            if typ != TYPE_ARRAY:
+                raise ValueError("Expected array")
+            return n
+        if execute == EX_READ_MAP_HEADER:
+            if typ != TYPE_MAP:
+                raise ValueError("Expected map")
+            return n
+        # TODO should we eliminate the recursion?
+        if typ == TYPE_ARRAY:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call `list_hook`
+                    self._unpack(EX_SKIP)
+                return
+            ret = newlist_hint(n)
+            for i in xrange(n):
+                ret.append(self._unpack(EX_CONSTRUCT))
+            if self._list_hook is not None:
+                ret = self._list_hook(ret)
+            # TODO is the interaction between `list_hook` and `use_list` ok?
+            return ret if self._use_list else tuple(ret)
+        if typ == TYPE_MAP:
+            if execute == EX_SKIP:
+                for i in xrange(n):
+                    # TODO check whether we need to call hooks
+                    self._unpack(EX_SKIP)
+                    self._unpack(EX_SKIP)
+                return
+            if self._object_pairs_hook is not None:
+                ret = self._object_pairs_hook(
+                    (self._unpack(EX_CONSTRUCT), self._unpack(EX_CONSTRUCT))
+                    for _ in xrange(n)
+                )
+            else:
+                ret = {}
+                for _ in xrange(n):
+                    key = self._unpack(EX_CONSTRUCT)
+                    if self._strict_map_key and type(key) not in (unicode, bytes):
+                        raise ValueError(
+                            "%s is not allowed for map key" % str(type(key))
+                        )
+                    if not PY2 and type(key) is str:
+                        key = sys.intern(key)
+                    ret[key] = self._unpack(EX_CONSTRUCT)
+                if self._object_hook is not None:
+                    ret = self._object_hook(ret)
+            return ret
+        if execute == EX_SKIP:
+            return
+        if typ == TYPE_RAW:
+            if self._raw:
+                obj = bytes(obj)
+            else:
+                obj = obj.decode("utf_8", self._unicode_errors)
+            return obj
+        if typ == TYPE_BIN:
+            return bytes(obj)
+        if typ == TYPE_EXT:
+            if n == -1:  # timestamp
+                ts = Timestamp.from_bytes(bytes(obj))
+                if self._timestamp == 1:
+                    return ts.to_unix()
+                elif self._timestamp == 2:
+                    return ts.to_unix_nano()
+                elif self._timestamp == 3:
+                    return ts.to_datetime()
+                else:
+                    return ts
+            else:
+                return self._ext_hook(n, bytes(obj))
+        assert typ == TYPE_IMMEDIATE
+        return obj
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+            self._consume()
+            return ret
+        except OutOfData:
+            self._consume()
+            raise StopIteration
+        except RecursionError:
+            raise StackError
+
+    next = __next__
+
+    def skip(self):
+        self._unpack(EX_SKIP)
+        self._consume()
+
+    def unpack(self):
+        try:
+            ret = self._unpack(EX_CONSTRUCT)
+        except RecursionError:
+            raise StackError
+        self._consume()
+        return ret
+
+    def read_array_header(self):
+        ret = self._unpack(EX_READ_ARRAY_HEADER)
+        self._consume()
+        return ret
+
+    def read_map_header(self):
+        ret = self._unpack(EX_READ_MAP_HEADER)
+        self._consume()
+        return ret
+
+    def tell(self):
+        return self._stream_offset
+
+
+class Packer(object):
+    """
+    MessagePack Packer
+
+    Usage::
+
+        packer = Packer()
+        astream.write(packer.pack(a))
+        astream.write(packer.pack(b))
+
+    Packer's constructor has some keyword arguments:
+
+    :param callable default:
+        Convert user type to builtin type that Packer supports.
+        See also simplejson's document.
+
+    :param bool use_single_float:
+        Use single precision float type for float. (default: False)
+
+    :param bool autoreset:
+        Reset buffer after each pack and return its content as `bytes`. (default: True).
+        If set this to false, use `bytes()` to get content and `.reset()` to clear buffer.
+
+    :param bool use_bin_type:
+        Use bin type introduced in msgpack spec 2.0 for bytes.
+        It also enables str8 type for unicode. (default: True)
+
+    :param bool strict_types:
+        If set to true, types will be checked to be exact. Derived classes
+        from serializable types will not be serialized and will be
+        treated as unsupported type and forwarded to default.
+        Additionally tuples will not be serialized as lists.
+        This is useful when trying to implement accurate serialization
+        for python types.
+
+    :param bool datetime:
+        If set to true, datetime with tzinfo is packed into Timestamp type.
+        Note that the tzinfo is stripped in the timestamp.
+        You can get UTC datetime with `timestamp=3` option of the Unpacker.
+        (Python 2 is not supported).
+
+    :param str unicode_errors:
+        The error handler for encoding unicode. (default: 'strict')
+        DO NOT USE THIS!!  This option is kept for very specific usage.
+
+    Example of streaming deserialize from file-like object::
+
+        unpacker = Unpacker(file_like)
+        for o in unpacker:
+            process(o)
+
+    Example of streaming deserialize from socket::
+
+        unpacker = Unpacker()
+        while True:
+            buf = sock.recv(1024**2)
+            if not buf:
+                break
+            unpacker.feed(buf)
+            for o in unpacker:
+                process(o)
+
+    Raises ``ExtraData`` when *packed* contains extra bytes.
+    Raises ``OutOfData`` when *packed* is incomplete.
+    Raises ``FormatError`` when *packed* is not valid msgpack.
+    Raises ``StackError`` when *packed* contains too nested.
+    Other exceptions can be raised during unpacking.
+    """
+
+    def __init__(
+        self,
+        default=None,
+        use_single_float=False,
+        autoreset=True,
+        use_bin_type=True,
+        strict_types=False,
+        datetime=False,
+        unicode_errors=None,
+    ):
+        self._strict_types = strict_types
+        self._use_float = use_single_float
+        self._autoreset = autoreset
+        self._use_bin_type = use_bin_type
+        self._buffer = StringIO()
+        if PY2 and datetime:
+            raise ValueError("datetime is not supported in Python 2")
+        self._datetime = bool(datetime)
+        self._unicode_errors = unicode_errors or "strict"
+        if default is not None:
+            if not callable(default):
+                raise TypeError("default must be callable")
+        self._default = default
+
+    def _pack(
+        self,
+        obj,
+        nest_limit=DEFAULT_RECURSE_LIMIT,
+        check=isinstance,
+        check_type_strict=_check_type_strict,
+    ):
+        default_used = False
+        if self._strict_types:
+            check = check_type_strict
+            list_types = list
+        else:
+            list_types = (list, tuple)
+        while True:
+            if nest_limit < 0:
+                raise ValueError("recursion limit exceeded")
+            if obj is None:
+                return self._buffer.write(b"\xc0")
+            if check(obj, bool):
+                if obj:
+                    return self._buffer.write(b"\xc3")
+                return self._buffer.write(b"\xc2")
+            if check(obj, int_types):
+                if 0 <= obj < 0x80:
+                    return self._buffer.write(struct.pack("B", obj))
+                if -0x20 <= obj < 0:
+                    return self._buffer.write(struct.pack("b", obj))
+                if 0x80 <= obj <= 0xFF:
+                    return self._buffer.write(struct.pack("BB", 0xCC, obj))
+                if -0x80 <= obj < 0:
+                    return self._buffer.write(struct.pack(">Bb", 0xD0, obj))
+                if 0xFF < obj <= 0xFFFF:
+                    return self._buffer.write(struct.pack(">BH", 0xCD, obj))
+                if -0x8000 <= obj < -0x80:
+                    return self._buffer.write(struct.pack(">Bh", 0xD1, obj))
+                if 0xFFFF < obj <= 0xFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BI", 0xCE, obj))
+                if -0x80000000 <= obj < -0x8000:
+                    return self._buffer.write(struct.pack(">Bi", 0xD2, obj))
+                if 0xFFFFFFFF < obj <= 0xFFFFFFFFFFFFFFFF:
+                    return self._buffer.write(struct.pack(">BQ", 0xCF, obj))
+                if -0x8000000000000000 <= obj < -0x80000000:
+                    return self._buffer.write(struct.pack(">Bq", 0xD3, obj))
+                if not default_used and self._default is not None:
+                    obj = self._default(obj)
+                    default_used = True
+                    continue
+                raise OverflowError("Integer value out of range")
+            if check(obj, (bytes, bytearray)):
+                n = len(obj)
+                if n >= 2**32:
+                    raise ValueError("%s is too large" % type(obj).__name__)
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, unicode):
+                obj = obj.encode("utf-8", self._unicode_errors)
+                n = len(obj)
+                if n >= 2**32:
+                    raise ValueError("String is too large")
+                self._pack_raw_header(n)
+                return self._buffer.write(obj)
+            if check(obj, memoryview):
+                n = len(obj) * obj.itemsize
+                if n >= 2**32:
+                    raise ValueError("Memoryview is too large")
+                self._pack_bin_header(n)
+                return self._buffer.write(obj)
+            if check(obj, float):
+                if self._use_float:
+                    return self._buffer.write(struct.pack(">Bf", 0xCA, obj))
+                return self._buffer.write(struct.pack(">Bd", 0xCB, obj))
+            if check(obj, (ExtType, Timestamp)):
+                if check(obj, Timestamp):
+                    code = -1
+                    data = obj.to_bytes()
+                else:
+                    code = obj.code
+                    data = obj.data
+                assert isinstance(code, int)
+                assert isinstance(data, bytes)
+                L = len(data)
+                if L == 1:
+                    self._buffer.write(b"\xd4")
+                elif L == 2:
+                    self._buffer.write(b"\xd5")
+                elif L == 4:
+                    self._buffer.write(b"\xd6")
+                elif L == 8:
+                    self._buffer.write(b"\xd7")
+                elif L == 16:
+                    self._buffer.write(b"\xd8")
+                elif L <= 0xFF:
+                    self._buffer.write(struct.pack(">BB", 0xC7, L))
+                elif L <= 0xFFFF:
+                    self._buffer.write(struct.pack(">BH", 0xC8, L))
+                else:
+                    self._buffer.write(struct.pack(">BI", 0xC9, L))
+                self._buffer.write(struct.pack("b", code))
+                self._buffer.write(data)
+                return
+            if check(obj, list_types):
+                n = len(obj)
+                self._pack_array_header(n)
+                for i in xrange(n):
+                    self._pack(obj[i], nest_limit - 1)
+                return
+            if check(obj, dict):
+                return self._pack_map_pairs(
+                    len(obj), dict_iteritems(obj), nest_limit - 1
+                )
+
+            if self._datetime and check(obj, _DateTime) and obj.tzinfo is not None:
+                obj = Timestamp.from_datetime(obj)
+                default_used = 1
+                continue
+
+            if not default_used and self._default is not None:
+                obj = self._default(obj)
+                default_used = 1
+                continue
+
+            if self._datetime and check(obj, _DateTime):
+                raise ValueError("Cannot serialize %r where tzinfo=None" % (obj,))
+
+            raise TypeError("Cannot serialize %r" % (obj,))
+
+    def pack(self, obj):
+        try:
+            self._pack(obj)
+        except:
+            self._buffer = StringIO()  # force reset
+            raise
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_pairs(self, pairs):
+        self._pack_map_pairs(len(pairs), pairs)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_array_header(self, n):
+        if n >= 2**32:
+            raise ValueError
+        self._pack_array_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_map_header(self, n):
+        if n >= 2**32:
+            raise ValueError
+        self._pack_map_header(n)
+        if self._autoreset:
+            ret = self._buffer.getvalue()
+            self._buffer = StringIO()
+            return ret
+
+    def pack_ext_type(self, typecode, data):
+        if not isinstance(typecode, int):
+            raise TypeError("typecode must have int type.")
+        if not 0 <= typecode <= 127:
+            raise ValueError("typecode should be 0-127")
+        if not isinstance(data, bytes):
+            raise TypeError("data must have bytes type")
+        L = len(data)
+        if L > 0xFFFFFFFF:
+            raise ValueError("Too large data")
+        if L == 1:
+            self._buffer.write(b"\xd4")
+        elif L == 2:
+            self._buffer.write(b"\xd5")
+        elif L == 4:
+            self._buffer.write(b"\xd6")
+        elif L == 8:
+            self._buffer.write(b"\xd7")
+        elif L == 16:
+            self._buffer.write(b"\xd8")
+        elif L <= 0xFF:
+            self._buffer.write(b"\xc7" + struct.pack("B", L))
+        elif L <= 0xFFFF:
+            self._buffer.write(b"\xc8" + struct.pack(">H", L))
+        else:
+            self._buffer.write(b"\xc9" + struct.pack(">I", L))
+        self._buffer.write(struct.pack("B", typecode))
+        self._buffer.write(data)
+
+    def _pack_array_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x90 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDC, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDD, n))
+        raise ValueError("Array is too large")
+
+    def _pack_map_header(self, n):
+        if n <= 0x0F:
+            return self._buffer.write(struct.pack("B", 0x80 + n))
+        if n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xDE, n))
+        if n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xDF, n))
+        raise ValueError("Dict is too large")
+
+    def _pack_map_pairs(self, n, pairs, nest_limit=DEFAULT_RECURSE_LIMIT):
+        self._pack_map_header(n)
+        for (k, v) in pairs:
+            self._pack(k, nest_limit - 1)
+            self._pack(v, nest_limit - 1)
+
+    def _pack_raw_header(self, n):
+        if n <= 0x1F:
+            self._buffer.write(struct.pack("B", 0xA0 + n))
+        elif self._use_bin_type and n <= 0xFF:
+            self._buffer.write(struct.pack(">BB", 0xD9, n))
+        elif n <= 0xFFFF:
+            self._buffer.write(struct.pack(">BH", 0xDA, n))
+        elif n <= 0xFFFFFFFF:
+            self._buffer.write(struct.pack(">BI", 0xDB, n))
+        else:
+            raise ValueError("Raw is too large")
+
+    def _pack_bin_header(self, n):
+        if not self._use_bin_type:
+            return self._pack_raw_header(n)
+        elif n <= 0xFF:
+            return self._buffer.write(struct.pack(">BB", 0xC4, n))
+        elif n <= 0xFFFF:
+            return self._buffer.write(struct.pack(">BH", 0xC5, n))
+        elif n <= 0xFFFFFFFF:
+            return self._buffer.write(struct.pack(">BI", 0xC6, n))
+        else:
+            raise ValueError("Bin is too large")
+
+    def bytes(self):
+        """Return internal buffer contents as bytes object"""
+        return self._buffer.getvalue()
+
+    def reset(self):
+        """Reset internal buffer.
+
+        This method is useful only when autoreset=False.
+        """
+        self._buffer = StringIO()
+
+    def getbuffer(self):
+        """Return view of internal buffer."""
+        if USING_STRINGBUILDER or PY2:
+            return memoryview(self.bytes())
+        else:
+            return self._buffer.getbuffer()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__about__.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..3551bc2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__about__.py
@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "21.3"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD-2-Clause or Apache-2.0"
+__copyright__ = "2014-2019 %s" % __author__
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..3c50c5d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__init__.py
@@ -0,0 +1,25 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from .__about__ import (
+    __author__,
+    __copyright__,
+    __email__,
+    __license__,
+    __summary__,
+    __title__,
+    __uri__,
+    __version__,
+)
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/__about__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/__about__.cpython-39.pyc
new file mode 100644
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new file mode 100644
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--- /dev/null
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new file mode 100644
index 0000000..7ebf2f8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/_manylinux.cpython-39.pyc
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new file mode 100644
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--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/_musllinux.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
new file mode 100644
index 0000000..d212ade
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-39.pyc
new file mode 100644
index 0000000..459a8e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/markers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
new file mode 100644
index 0000000..c9cc279
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
new file mode 100644
index 0000000..e17a95b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/tags.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/tags.cpython-39.pyc
new file mode 100644
index 0000000..93adc45
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/tags.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-39.pyc
new file mode 100644
index 0000000..5b041c5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/utils.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-39.pyc
new file mode 100644
index 0000000..778ff5c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/__pycache__/version.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_manylinux.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_manylinux.py
new file mode 100644
index 0000000..4c379aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_manylinux.py
@@ -0,0 +1,301 @@
+import collections
+import functools
+import os
+import re
+import struct
+import sys
+import warnings
+from typing import IO, Dict, Iterator, NamedTuple, Optional, Tuple
+
+
+# Python does not provide platform information at sufficient granularity to
+# identify the architecture of the running executable in some cases, so we
+# determine it dynamically by reading the information from the running
+# process. This only applies on Linux, which uses the ELF format.
+class _ELFFileHeader:
+    # https://en.wikipedia.org/wiki/Executable_and_Linkable_Format#File_header
+    class _InvalidELFFileHeader(ValueError):
+        """
+        An invalid ELF file header was found.
+        """
+
+    ELF_MAGIC_NUMBER = 0x7F454C46
+    ELFCLASS32 = 1
+    ELFCLASS64 = 2
+    ELFDATA2LSB = 1
+    ELFDATA2MSB = 2
+    EM_386 = 3
+    EM_S390 = 22
+    EM_ARM = 40
+    EM_X86_64 = 62
+    EF_ARM_ABIMASK = 0xFF000000
+    EF_ARM_ABI_VER5 = 0x05000000
+    EF_ARM_ABI_FLOAT_HARD = 0x00000400
+
+    def __init__(self, file: IO[bytes]) -> None:
+        def unpack(fmt: str) -> int:
+            try:
+                data = file.read(struct.calcsize(fmt))
+                result: Tuple[int, ...] = struct.unpack(fmt, data)
+            except struct.error:
+                raise _ELFFileHeader._InvalidELFFileHeader()
+            return result[0]
+
+        self.e_ident_magic = unpack(">I")
+        if self.e_ident_magic != self.ELF_MAGIC_NUMBER:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_class = unpack("B")
+        if self.e_ident_class not in {self.ELFCLASS32, self.ELFCLASS64}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_data = unpack("B")
+        if self.e_ident_data not in {self.ELFDATA2LSB, self.ELFDATA2MSB}:
+            raise _ELFFileHeader._InvalidELFFileHeader()
+        self.e_ident_version = unpack("B")
+        self.e_ident_osabi = unpack("B")
+        self.e_ident_abiversion = unpack("B")
+        self.e_ident_pad = file.read(7)
+        format_h = "<H" if self.e_ident_data == self.ELFDATA2LSB else ">H"
+        format_i = "<I" if self.e_ident_data == self.ELFDATA2LSB else ">I"
+        format_q = "<Q" if self.e_ident_data == self.ELFDATA2LSB else ">Q"
+        format_p = format_i if self.e_ident_class == self.ELFCLASS32 else format_q
+        self.e_type = unpack(format_h)
+        self.e_machine = unpack(format_h)
+        self.e_version = unpack(format_i)
+        self.e_entry = unpack(format_p)
+        self.e_phoff = unpack(format_p)
+        self.e_shoff = unpack(format_p)
+        self.e_flags = unpack(format_i)
+        self.e_ehsize = unpack(format_h)
+        self.e_phentsize = unpack(format_h)
+        self.e_phnum = unpack(format_h)
+        self.e_shentsize = unpack(format_h)
+        self.e_shnum = unpack(format_h)
+        self.e_shstrndx = unpack(format_h)
+
+
+def _get_elf_header() -> Optional[_ELFFileHeader]:
+    try:
+        with open(sys.executable, "rb") as f:
+            elf_header = _ELFFileHeader(f)
+    except (OSError, TypeError, _ELFFileHeader._InvalidELFFileHeader):
+        return None
+    return elf_header
+
+
+def _is_linux_armhf() -> bool:
+    # hard-float ABI can be detected from the ELF header of the running
+    # process
+    # https://static.docs.arm.com/ihi0044/g/aaelf32.pdf
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_ARM
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABIMASK
+    ) == elf_header.EF_ARM_ABI_VER5
+    result &= (
+        elf_header.e_flags & elf_header.EF_ARM_ABI_FLOAT_HARD
+    ) == elf_header.EF_ARM_ABI_FLOAT_HARD
+    return result
+
+
+def _is_linux_i686() -> bool:
+    elf_header = _get_elf_header()
+    if elf_header is None:
+        return False
+    result = elf_header.e_ident_class == elf_header.ELFCLASS32
+    result &= elf_header.e_ident_data == elf_header.ELFDATA2LSB
+    result &= elf_header.e_machine == elf_header.EM_386
+    return result
+
+
+def _have_compatible_abi(arch: str) -> bool:
+    if arch == "armv7l":
+        return _is_linux_armhf()
+    if arch == "i686":
+        return _is_linux_i686()
+    return arch in {"x86_64", "aarch64", "ppc64", "ppc64le", "s390x"}
+
+
+# If glibc ever changes its major version, we need to know what the last
+# minor version was, so we can build the complete list of all versions.
+# For now, guess what the highest minor version might be, assume it will
+# be 50 for testing. Once this actually happens, update the dictionary
+# with the actual value.
+_LAST_GLIBC_MINOR: Dict[int, int] = collections.defaultdict(lambda: 50)
+
+
+class _GLibCVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _glibc_version_string_confstr() -> Optional[str]:
+    """
+    Primary implementation of glibc_version_string using os.confstr.
+    """
+    # os.confstr is quite a bit faster than ctypes.DLL. It's also less likely
+    # to be broken or missing. This strategy is used in the standard library
+    # platform module.
+    # https://github.com/python/cpython/blob/fcf1d003bf4f0100c/Lib/platform.py#L175-L183
+    try:
+        # os.confstr("CS_GNU_LIBC_VERSION") returns a string like "glibc 2.17".
+        version_string = os.confstr("CS_GNU_LIBC_VERSION")
+        assert version_string is not None
+        _, version = version_string.split()
+    except (AssertionError, AttributeError, OSError, ValueError):
+        # os.confstr() or CS_GNU_LIBC_VERSION not available (or a bad value)...
+        return None
+    return version
+
+
+def _glibc_version_string_ctypes() -> Optional[str]:
+    """
+    Fallback implementation of glibc_version_string using ctypes.
+    """
+    try:
+        import ctypes
+    except ImportError:
+        return None
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    #
+    # We must also handle the special case where the executable is not a
+    # dynamically linked executable. This can occur when using musl libc,
+    # for example. In this situation, dlopen() will error, leading to an
+    # OSError. Interestingly, at least in the case of musl, there is no
+    # errno set on the OSError. The single string argument used to construct
+    # OSError comes from libc itself and is therefore not portable to
+    # hard code here. In any case, failure to call dlopen() means we
+    # can proceed, so we bail on our attempt.
+    try:
+        process_namespace = ctypes.CDLL(None)
+    except OSError:
+        return None
+
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str: str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+def _glibc_version_string() -> Optional[str]:
+    """Returns glibc version string, or None if not using glibc."""
+    return _glibc_version_string_confstr() or _glibc_version_string_ctypes()
+
+
+def _parse_glibc_version(version_str: str) -> Tuple[int, int]:
+    """Parse glibc version.
+
+    We use a regexp instead of str.split because we want to discard any
+    random junk that might come after the minor version -- this might happen
+    in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    uses version strings like "2.20-2014.11"). See gh-3588.
+    """
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            "Expected glibc version with 2 components major.minor,"
+            " got: %s" % version_str,
+            RuntimeWarning,
+        )
+        return -1, -1
+    return int(m.group("major")), int(m.group("minor"))
+
+
+@functools.lru_cache()
+def _get_glibc_version() -> Tuple[int, int]:
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return (-1, -1)
+    return _parse_glibc_version(version_str)
+
+
+# From PEP 513, PEP 600
+def _is_compatible(name: str, arch: str, version: _GLibCVersion) -> bool:
+    sys_glibc = _get_glibc_version()
+    if sys_glibc < version:
+        return False
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux  # noqa
+    except ImportError:
+        return True
+    if hasattr(_manylinux, "manylinux_compatible"):
+        result = _manylinux.manylinux_compatible(version[0], version[1], arch)
+        if result is not None:
+            return bool(result)
+        return True
+    if version == _GLibCVersion(2, 5):
+        if hasattr(_manylinux, "manylinux1_compatible"):
+            return bool(_manylinux.manylinux1_compatible)
+    if version == _GLibCVersion(2, 12):
+        if hasattr(_manylinux, "manylinux2010_compatible"):
+            return bool(_manylinux.manylinux2010_compatible)
+    if version == _GLibCVersion(2, 17):
+        if hasattr(_manylinux, "manylinux2014_compatible"):
+            return bool(_manylinux.manylinux2014_compatible)
+    return True
+
+
+_LEGACY_MANYLINUX_MAP = {
+    # CentOS 7 w/ glibc 2.17 (PEP 599)
+    (2, 17): "manylinux2014",
+    # CentOS 6 w/ glibc 2.12 (PEP 571)
+    (2, 12): "manylinux2010",
+    # CentOS 5 w/ glibc 2.5 (PEP 513)
+    (2, 5): "manylinux1",
+}
+
+
+def platform_tags(linux: str, arch: str) -> Iterator[str]:
+    if not _have_compatible_abi(arch):
+        return
+    # Oldest glibc to be supported regardless of architecture is (2, 17).
+    too_old_glibc2 = _GLibCVersion(2, 16)
+    if arch in {"x86_64", "i686"}:
+        # On x86/i686 also oldest glibc to be supported is (2, 5).
+        too_old_glibc2 = _GLibCVersion(2, 4)
+    current_glibc = _GLibCVersion(*_get_glibc_version())
+    glibc_max_list = [current_glibc]
+    # We can assume compatibility across glibc major versions.
+    # https://sourceware.org/bugzilla/show_bug.cgi?id=24636
+    #
+    # Build a list of maximum glibc versions so that we can
+    # output the canonical list of all glibc from current_glibc
+    # down to too_old_glibc2, including all intermediary versions.
+    for glibc_major in range(current_glibc.major - 1, 1, -1):
+        glibc_minor = _LAST_GLIBC_MINOR[glibc_major]
+        glibc_max_list.append(_GLibCVersion(glibc_major, glibc_minor))
+    for glibc_max in glibc_max_list:
+        if glibc_max.major == too_old_glibc2.major:
+            min_minor = too_old_glibc2.minor
+        else:
+            # For other glibc major versions oldest supported is (x, 0).
+            min_minor = -1
+        for glibc_minor in range(glibc_max.minor, min_minor, -1):
+            glibc_version = _GLibCVersion(glibc_max.major, glibc_minor)
+            tag = "manylinux_{}_{}".format(*glibc_version)
+            if _is_compatible(tag, arch, glibc_version):
+                yield linux.replace("linux", tag)
+            # Handle the legacy manylinux1, manylinux2010, manylinux2014 tags.
+            if glibc_version in _LEGACY_MANYLINUX_MAP:
+                legacy_tag = _LEGACY_MANYLINUX_MAP[glibc_version]
+                if _is_compatible(legacy_tag, arch, glibc_version):
+                    yield linux.replace("linux", legacy_tag)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_musllinux.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_musllinux.py
new file mode 100644
index 0000000..8ac3059
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_musllinux.py
@@ -0,0 +1,136 @@
+"""PEP 656 support.
+
+This module implements logic to detect if the currently running Python is
+linked against musl, and what musl version is used.
+"""
+
+import contextlib
+import functools
+import operator
+import os
+import re
+import struct
+import subprocess
+import sys
+from typing import IO, Iterator, NamedTuple, Optional, Tuple
+
+
+def _read_unpacked(f: IO[bytes], fmt: str) -> Tuple[int, ...]:
+    return struct.unpack(fmt, f.read(struct.calcsize(fmt)))
+
+
+def _parse_ld_musl_from_elf(f: IO[bytes]) -> Optional[str]:
+    """Detect musl libc location by parsing the Python executable.
+
+    Based on: https://gist.github.com/lyssdod/f51579ae8d93c8657a5564aefc2ffbca
+    ELF header: https://refspecs.linuxfoundation.org/elf/gabi4+/ch4.eheader.html
+    """
+    f.seek(0)
+    try:
+        ident = _read_unpacked(f, "16B")
+    except struct.error:
+        return None
+    if ident[:4] != tuple(b"\x7fELF"):  # Invalid magic, not ELF.
+        return None
+    f.seek(struct.calcsize("HHI"), 1)  # Skip file type, machine, and version.
+
+    try:
+        # e_fmt: Format for program header.
+        # p_fmt: Format for section header.
+        # p_idx: Indexes to find p_type, p_offset, and p_filesz.
+        e_fmt, p_fmt, p_idx = {
+            1: ("IIIIHHH", "IIIIIIII", (0, 1, 4)),  # 32-bit.
+            2: ("QQQIHHH", "IIQQQQQQ", (0, 2, 5)),  # 64-bit.
+        }[ident[4]]
+    except KeyError:
+        return None
+    else:
+        p_get = operator.itemgetter(*p_idx)
+
+    # Find the interpreter section and return its content.
+    try:
+        _, e_phoff, _, _, _, e_phentsize, e_phnum = _read_unpacked(f, e_fmt)
+    except struct.error:
+        return None
+    for i in range(e_phnum + 1):
+        f.seek(e_phoff + e_phentsize * i)
+        try:
+            p_type, p_offset, p_filesz = p_get(_read_unpacked(f, p_fmt))
+        except struct.error:
+            return None
+        if p_type != 3:  # Not PT_INTERP.
+            continue
+        f.seek(p_offset)
+        interpreter = os.fsdecode(f.read(p_filesz)).strip("\0")
+        if "musl" not in interpreter:
+            return None
+        return interpreter
+    return None
+
+
+class _MuslVersion(NamedTuple):
+    major: int
+    minor: int
+
+
+def _parse_musl_version(output: str) -> Optional[_MuslVersion]:
+    lines = [n for n in (n.strip() for n in output.splitlines()) if n]
+    if len(lines) < 2 or lines[0][:4] != "musl":
+        return None
+    m = re.match(r"Version (\d+)\.(\d+)", lines[1])
+    if not m:
+        return None
+    return _MuslVersion(major=int(m.group(1)), minor=int(m.group(2)))
+
+
+@functools.lru_cache()
+def _get_musl_version(executable: str) -> Optional[_MuslVersion]:
+    """Detect currently-running musl runtime version.
+
+    This is done by checking the specified executable's dynamic linking
+    information, and invoking the loader to parse its output for a version
+    string. If the loader is musl, the output would be something like::
+
+        musl libc (x86_64)
+        Version 1.2.2
+        Dynamic Program Loader
+    """
+    with contextlib.ExitStack() as stack:
+        try:
+            f = stack.enter_context(open(executable, "rb"))
+        except OSError:
+            return None
+        ld = _parse_ld_musl_from_elf(f)
+    if not ld:
+        return None
+    proc = subprocess.run([ld], stderr=subprocess.PIPE, universal_newlines=True)
+    return _parse_musl_version(proc.stderr)
+
+
+def platform_tags(arch: str) -> Iterator[str]:
+    """Generate musllinux tags compatible to the current platform.
+
+    :param arch: Should be the part of platform tag after the ``linux_``
+        prefix, e.g. ``x86_64``. The ``linux_`` prefix is assumed as a
+        prerequisite for the current platform to be musllinux-compatible.
+
+    :returns: An iterator of compatible musllinux tags.
+    """
+    sys_musl = _get_musl_version(sys.executable)
+    if sys_musl is None:  # Python not dynamically linked against musl.
+        return
+    for minor in range(sys_musl.minor, -1, -1):
+        yield f"musllinux_{sys_musl.major}_{minor}_{arch}"
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sysconfig
+
+    plat = sysconfig.get_platform()
+    assert plat.startswith("linux-"), "not linux"
+
+    print("plat:", plat)
+    print("musl:", _get_musl_version(sys.executable))
+    print("tags:", end=" ")
+    for t in platform_tags(re.sub(r"[.-]", "_", plat.split("-", 1)[-1])):
+        print(t, end="\n      ")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_structures.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..90a6465
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/_structures.py
@@ -0,0 +1,61 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+
+class InfinityType:
+    def __repr__(self) -> str:
+        return "Infinity"
+
+    def __hash__(self) -> int:
+        return hash(repr(self))
+
+    def __lt__(self, other: object) -> bool:
+        return False
+
+    def __le__(self, other: object) -> bool:
+        return False
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, self.__class__)
+
+    def __gt__(self, other: object) -> bool:
+        return True
+
+    def __ge__(self, other: object) -> bool:
+        return True
+
+    def __neg__(self: object) -> "NegativeInfinityType":
+        return NegativeInfinity
+
+
+Infinity = InfinityType()
+
+
+class NegativeInfinityType:
+    def __repr__(self) -> str:
+        return "-Infinity"
+
+    def __hash__(self) -> int:
+        return hash(repr(self))
+
+    def __lt__(self, other: object) -> bool:
+        return True
+
+    def __le__(self, other: object) -> bool:
+        return True
+
+    def __eq__(self, other: object) -> bool:
+        return isinstance(other, self.__class__)
+
+    def __gt__(self, other: object) -> bool:
+        return False
+
+    def __ge__(self, other: object) -> bool:
+        return False
+
+    def __neg__(self: object) -> InfinityType:
+        return Infinity
+
+
+NegativeInfinity = NegativeInfinityType()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/markers.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/markers.py
new file mode 100644
index 0000000..540e7a4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/markers.py
@@ -0,0 +1,304 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import operator
+import os
+import platform
+import sys
+from typing import Any, Callable, Dict, List, Optional, Tuple, Union
+
+from pip._vendor.pyparsing import (  # noqa: N817
+    Forward,
+    Group,
+    Literal as L,
+    ParseException,
+    ParseResults,
+    QuotedString,
+    ZeroOrMore,
+    stringEnd,
+    stringStart,
+)
+
+from .specifiers import InvalidSpecifier, Specifier
+
+__all__ = [
+    "InvalidMarker",
+    "UndefinedComparison",
+    "UndefinedEnvironmentName",
+    "Marker",
+    "default_environment",
+]
+
+Operator = Callable[[str, str], bool]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node:
+    def __init__(self, value: Any) -> None:
+        self.value = value
+
+    def __str__(self) -> str:
+        return str(self.value)
+
+    def __repr__(self) -> str:
+        return f"<{self.__class__.__name__}('{self}')>"
+
+    def serialize(self) -> str:
+        raise NotImplementedError
+
+
+class Variable(Node):
+    def serialize(self) -> str:
+        return str(self)
+
+
+class Value(Node):
+    def serialize(self) -> str:
+        return f'"{self}"'
+
+
+class Op(Node):
+    def serialize(self) -> str:
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version")
+    | L("platform_python_implementation")
+    | L("implementation_name")
+    | L("python_full_version")
+    | L("platform_release")
+    | L("platform_version")
+    | L("platform_machine")
+    | L("platform_system")
+    | L("python_version")
+    | L("sys_platform")
+    | L("os_name")
+    | L("os.name")  # PEP-345
+    | L("sys.platform")  # PEP-345
+    | L("platform.version")  # PEP-345
+    | L("platform.machine")  # PEP-345
+    | L("platform.python_implementation")  # PEP-345
+    | L("python_implementation")  # undocumented setuptools legacy
+    | L("extra")  # PEP-508
+)
+ALIASES = {
+    "os.name": "os_name",
+    "sys.platform": "sys_platform",
+    "platform.version": "platform_version",
+    "platform.machine": "platform_machine",
+    "platform.python_implementation": "platform_python_implementation",
+    "python_implementation": "platform_python_implementation",
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results: Union[ParseResults, List[Any]]) -> List[Any]:
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(
+    marker: Union[List[str], Tuple[Node, ...], str], first: Optional[bool] = True
+) -> str:
+
+    assert isinstance(marker, (list, tuple, str))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (
+        isinstance(marker, list)
+        and len(marker) == 1
+        and isinstance(marker[0], (list, tuple))
+    ):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators: Dict[str, Operator] = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs: str, op: Op, rhs: str) -> bool:
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper: Optional[Operator] = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(f"Undefined {op!r} on {lhs!r} and {rhs!r}.")
+
+    return oper(lhs, rhs)
+
+
+class Undefined:
+    pass
+
+
+_undefined = Undefined()
+
+
+def _get_env(environment: Dict[str, str], name: str) -> str:
+    value: Union[str, Undefined] = environment.get(name, _undefined)
+
+    if isinstance(value, Undefined):
+        raise UndefinedEnvironmentName(
+            f"{name!r} does not exist in evaluation environment."
+        )
+
+    return value
+
+
+def _evaluate_markers(markers: List[Any], environment: Dict[str, str]) -> bool:
+    groups: List[List[bool]] = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, str))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info: "sys._version_info") -> str:
+    version = "{0.major}.{0.minor}.{0.micro}".format(info)
+    kind = info.releaselevel
+    if kind != "final":
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment() -> Dict[str, str]:
+    iver = format_full_version(sys.implementation.version)
+    implementation_name = sys.implementation.name
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": ".".join(platform.python_version_tuple()[:2]),
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker:
+    def __init__(self, marker: str) -> None:
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            raise InvalidMarker(
+                f"Invalid marker: {marker!r}, parse error at "
+                f"{marker[e.loc : e.loc + 8]!r}"
+            )
+
+    def __str__(self) -> str:
+        return _format_marker(self._markers)
+
+    def __repr__(self) -> str:
+        return f"<Marker('{self}')>"
+
+    def evaluate(self, environment: Optional[Dict[str, str]] = None) -> bool:
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/requirements.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..1eab7dd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/requirements.py
@@ -0,0 +1,146 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import re
+import string
+import urllib.parse
+from typing import List, Optional as TOptional, Set
+
+from pip._vendor.pyparsing import (  # noqa
+    Combine,
+    Literal as L,
+    Optional,
+    ParseException,
+    Regex,
+    Word,
+    ZeroOrMore,
+    originalTextFor,
+    stringEnd,
+    stringStart,
+)
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r"[^ ]+")("url")
+URL = AT + URI
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(
+    VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
+)("_raw_spec")
+_VERSION_SPEC = Optional((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY)
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start : t._original_end])
+)
+MARKER_SEPARATOR = SEMICOLON
+MARKER = MARKER_SEPARATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+# pyparsing isn't thread safe during initialization, so we do it eagerly, see
+# issue #104
+REQUIREMENT.parseString("x[]")
+
+
+class Requirement:
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string: str) -> None:
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                f'Parse error at "{ requirement_string[e.loc : e.loc + 8]!r}": {e.msg}'
+            )
+
+        self.name: str = req.name
+        if req.url:
+            parsed_url = urllib.parse.urlparse(req.url)
+            if parsed_url.scheme == "file":
+                if urllib.parse.urlunparse(parsed_url) != req.url:
+                    raise InvalidRequirement("Invalid URL given")
+            elif not (parsed_url.scheme and parsed_url.netloc) or (
+                not parsed_url.scheme and not parsed_url.netloc
+            ):
+                raise InvalidRequirement(f"Invalid URL: {req.url}")
+            self.url: TOptional[str] = req.url
+        else:
+            self.url = None
+        self.extras: Set[str] = set(req.extras.asList() if req.extras else [])
+        self.specifier: SpecifierSet = SpecifierSet(req.specifier)
+        self.marker: TOptional[Marker] = req.marker if req.marker else None
+
+    def __str__(self) -> str:
+        parts: List[str] = [self.name]
+
+        if self.extras:
+            formatted_extras = ",".join(sorted(self.extras))
+            parts.append(f"[{formatted_extras}]")
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append(f"@ {self.url}")
+            if self.marker:
+                parts.append(" ")
+
+        if self.marker:
+            parts.append(f"; {self.marker}")
+
+        return "".join(parts)
+
+    def __repr__(self) -> str:
+        return f"<Requirement('{self}')>"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/specifiers.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..0e218a6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/specifiers.py
@@ -0,0 +1,802 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import abc
+import functools
+import itertools
+import re
+import warnings
+from typing import (
+    Callable,
+    Dict,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Pattern,
+    Set,
+    Tuple,
+    TypeVar,
+    Union,
+)
+
+from .utils import canonicalize_version
+from .version import LegacyVersion, Version, parse
+
+ParsedVersion = Union[Version, LegacyVersion]
+UnparsedVersion = Union[Version, LegacyVersion, str]
+VersionTypeVar = TypeVar("VersionTypeVar", bound=UnparsedVersion)
+CallableOperator = Callable[[ParsedVersion, str], bool]
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(metaclass=abc.ABCMeta):
+    @abc.abstractmethod
+    def __str__(self) -> str:
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self) -> int:
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other: object) -> bool:
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self) -> Optional[bool]:
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value: bool) -> None:
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item: str, prereleases: Optional[bool] = None) -> bool:
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators: Dict[str, str] = {}
+    _regex: Pattern[str]
+
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier(f"Invalid specifier: '{spec}'")
+
+        self._spec: Tuple[str, str] = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self) -> str:
+        pre = (
+            f", prereleases={self.prereleases!r}"
+            if self._prereleases is not None
+            else ""
+        )
+
+        return f"<{self.__class__.__name__}({str(self)!r}{pre})>"
+
+    def __str__(self) -> str:
+        return "{}{}".format(*self._spec)
+
+    @property
+    def _canonical_spec(self) -> Tuple[str, str]:
+        return self._spec[0], canonicalize_version(self._spec[1])
+
+    def __hash__(self) -> int:
+        return hash(self._canonical_spec)
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, str):
+            try:
+                other = self.__class__(str(other))
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._canonical_spec == other._canonical_spec
+
+    def _get_operator(self, op: str) -> CallableOperator:
+        operator_callable: CallableOperator = getattr(
+            self, f"_compare_{self._operators[op]}"
+        )
+        return operator_callable
+
+    def _coerce_version(self, version: UnparsedVersion) -> ParsedVersion:
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self) -> str:
+        return self._spec[0]
+
+    @property
+    def version(self) -> str:
+        return self._spec[1]
+
+    @property
+    def prereleases(self) -> Optional[bool]:
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value: bool) -> None:
+        self._prereleases = value
+
+    def __contains__(self, item: str) -> bool:
+        return self.contains(item)
+
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
+
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        normalized_item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if normalized_item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        operator_callable: CallableOperator = self._get_operator(self.operator)
+        return operator_callable(normalized_item, self.version)
+
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
+
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later in case nothing
+                # else matches this specifier.
+                if parsed_version.is_prerelease and not (
+                    prereleases or self.prereleases
+                ):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the beginning.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
+        super().__init__(spec, prereleases)
+
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def _coerce_version(self, version: UnparsedVersion) -> LegacyVersion:
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective: LegacyVersion, spec: str) -> bool:
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective: LegacyVersion, spec: str) -> bool:
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective: LegacyVersion, spec: str) -> bool:
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(
+        self, prospective: LegacyVersion, spec: str
+    ) -> bool:
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective: LegacyVersion, spec: str) -> bool:
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective: LegacyVersion, spec: str) -> bool:
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(
+    fn: Callable[["Specifier", ParsedVersion, str], bool]
+) -> Callable[["Specifier", ParsedVersion, str], bool]:
+    @functools.wraps(fn)
+    def wrapped(self: "Specifier", prospective: ParsedVersion, spec: str) -> bool:
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective: ParsedVersion, spec: str) -> bool:
+
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore suffix segments.
+        prefix = ".".join(
+            list(itertools.takewhile(_is_not_suffix, _version_split(spec)))[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
+            prospective, prefix
+        )
+
+    @_require_version_compare
+    def _compare_equal(self, prospective: ParsedVersion, spec: str) -> bool:
+
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            split_spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            split_prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            shortened_prospective = split_prospective[: len(split_spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            padded_spec, padded_prospective = _pad_version(
+                split_spec, shortened_prospective
+            )
+
+            return padded_prospective == padded_spec
+        else:
+            # Convert our spec string into a Version
+            spec_version = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec_version.local:
+                prospective = Version(prospective.public)
+
+            return prospective == spec_version
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective: ParsedVersion, spec: str) -> bool:
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective: ParsedVersion, spec: str) -> bool:
+
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return Version(prospective.public) <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(
+        self, prospective: ParsedVersion, spec: str
+    ) -> bool:
+
+        # NB: Local version identifiers are NOT permitted in the version
+        # specifier, so local version labels can be universally removed from
+        # the prospective version.
+        return Version(prospective.public) >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
+
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec_str)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective: ParsedVersion, spec_str: str) -> bool:
+
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec_str)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is technically greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective: Version, spec: str) -> bool:
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self) -> bool:
+
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value: bool) -> None:
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version: str) -> List[str]:
+    result: List[str] = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _is_not_suffix(segment: str) -> bool:
+    return not any(
+        segment.startswith(prefix) for prefix in ("dev", "a", "b", "rc", "post")
+    )
+
+
+def _pad_version(left: List[str], right: List[str]) -> Tuple[List[str], List[str]]:
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]) :])
+    right_split.append(right[len(right_split[0]) :])
+
+    # Insert our padding
+    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
+    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
+
+    return (list(itertools.chain(*left_split)), list(itertools.chain(*right_split)))
+
+
+class SpecifierSet(BaseSpecifier):
+    def __init__(
+        self, specifiers: str = "", prereleases: Optional[bool] = None
+    ) -> None:
+
+        # Split on , to break each individual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        split_specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed: Set[_IndividualSpecifier] = set()
+        for specifier in split_specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self) -> str:
+        pre = (
+            f", prereleases={self.prereleases!r}"
+            if self._prereleases is not None
+            else ""
+        )
+
+        return f"<SpecifierSet({str(self)!r}{pre})>"
+
+    def __str__(self) -> str:
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self) -> int:
+        return hash(self._specs)
+
+    def __and__(self, other: Union["SpecifierSet", str]) -> "SpecifierSet":
+        if isinstance(other, str):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other: object) -> bool:
+        if isinstance(other, (str, _IndividualSpecifier)):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __len__(self) -> int:
+        return len(self._specs)
+
+    def __iter__(self) -> Iterator[_IndividualSpecifier]:
+        return iter(self._specs)
+
+    @property
+    def prereleases(self) -> Optional[bool]:
+
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value: bool) -> None:
+        self._prereleases = value
+
+    def __contains__(self, item: UnparsedVersion) -> bool:
+        return self.contains(item)
+
+    def contains(
+        self, item: UnparsedVersion, prereleases: Optional[bool] = None
+    ) -> bool:
+
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(s.contains(item, prereleases=prereleases) for s in self._specs)
+
+    def filter(
+        self, iterable: Iterable[VersionTypeVar], prereleases: Optional[bool] = None
+    ) -> Iterable[VersionTypeVar]:
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered: List[VersionTypeVar] = []
+            found_prereleases: List[VersionTypeVar] = []
+
+            item: UnparsedVersion
+            parsed_version: Union[Version, LegacyVersion]
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/tags.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/tags.py
new file mode 100644
index 0000000..9a3d25a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/tags.py
@@ -0,0 +1,487 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import logging
+import platform
+import sys
+import sysconfig
+from importlib.machinery import EXTENSION_SUFFIXES
+from typing import (
+    Dict,
+    FrozenSet,
+    Iterable,
+    Iterator,
+    List,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+    cast,
+)
+
+from . import _manylinux, _musllinux
+
+logger = logging.getLogger(__name__)
+
+PythonVersion = Sequence[int]
+MacVersion = Tuple[int, int]
+
+INTERPRETER_SHORT_NAMES: Dict[str, str] = {
+    "python": "py",  # Generic.
+    "cpython": "cp",
+    "pypy": "pp",
+    "ironpython": "ip",
+    "jython": "jy",
+}
+
+
+_32_BIT_INTERPRETER = sys.maxsize <= 2 ** 32
+
+
+class Tag:
+    """
+    A representation of the tag triple for a wheel.
+
+    Instances are considered immutable and thus are hashable. Equality checking
+    is also supported.
+    """
+
+    __slots__ = ["_interpreter", "_abi", "_platform", "_hash"]
+
+    def __init__(self, interpreter: str, abi: str, platform: str) -> None:
+        self._interpreter = interpreter.lower()
+        self._abi = abi.lower()
+        self._platform = platform.lower()
+        # The __hash__ of every single element in a Set[Tag] will be evaluated each time
+        # that a set calls its `.disjoint()` method, which may be called hundreds of
+        # times when scanning a page of links for packages with tags matching that
+        # Set[Tag]. Pre-computing the value here produces significant speedups for
+        # downstream consumers.
+        self._hash = hash((self._interpreter, self._abi, self._platform))
+
+    @property
+    def interpreter(self) -> str:
+        return self._interpreter
+
+    @property
+    def abi(self) -> str:
+        return self._abi
+
+    @property
+    def platform(self) -> str:
+        return self._platform
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Tag):
+            return NotImplemented
+
+        return (
+            (self._hash == other._hash)  # Short-circuit ASAP for perf reasons.
+            and (self._platform == other._platform)
+            and (self._abi == other._abi)
+            and (self._interpreter == other._interpreter)
+        )
+
+    def __hash__(self) -> int:
+        return self._hash
+
+    def __str__(self) -> str:
+        return f"{self._interpreter}-{self._abi}-{self._platform}"
+
+    def __repr__(self) -> str:
+        return f"<{self} @ {id(self)}>"
+
+
+def parse_tag(tag: str) -> FrozenSet[Tag]:
+    """
+    Parses the provided tag (e.g. `py3-none-any`) into a frozenset of Tag instances.
+
+    Returning a set is required due to the possibility that the tag is a
+    compressed tag set.
+    """
+    tags = set()
+    interpreters, abis, platforms = tag.split("-")
+    for interpreter in interpreters.split("."):
+        for abi in abis.split("."):
+            for platform_ in platforms.split("."):
+                tags.add(Tag(interpreter, abi, platform_))
+    return frozenset(tags)
+
+
+def _get_config_var(name: str, warn: bool = False) -> Union[int, str, None]:
+    value = sysconfig.get_config_var(name)
+    if value is None and warn:
+        logger.debug(
+            "Config variable '%s' is unset, Python ABI tag may be incorrect", name
+        )
+    return value
+
+
+def _normalize_string(string: str) -> str:
+    return string.replace(".", "_").replace("-", "_")
+
+
+def _abi3_applies(python_version: PythonVersion) -> bool:
+    """
+    Determine if the Python version supports abi3.
+
+    PEP 384 was first implemented in Python 3.2.
+    """
+    return len(python_version) > 1 and tuple(python_version) >= (3, 2)
+
+
+def _cpython_abis(py_version: PythonVersion, warn: bool = False) -> List[str]:
+    py_version = tuple(py_version)  # To allow for version comparison.
+    abis = []
+    version = _version_nodot(py_version[:2])
+    debug = pymalloc = ucs4 = ""
+    with_debug = _get_config_var("Py_DEBUG", warn)
+    has_refcount = hasattr(sys, "gettotalrefcount")
+    # Windows doesn't set Py_DEBUG, so checking for support of debug-compiled
+    # extension modules is the best option.
+    # https://github.com/pypa/pip/issues/3383#issuecomment-173267692
+    has_ext = "_d.pyd" in EXTENSION_SUFFIXES
+    if with_debug or (with_debug is None and (has_refcount or has_ext)):
+        debug = "d"
+    if py_version < (3, 8):
+        with_pymalloc = _get_config_var("WITH_PYMALLOC", warn)
+        if with_pymalloc or with_pymalloc is None:
+            pymalloc = "m"
+        if py_version < (3, 3):
+            unicode_size = _get_config_var("Py_UNICODE_SIZE", warn)
+            if unicode_size == 4 or (
+                unicode_size is None and sys.maxunicode == 0x10FFFF
+            ):
+                ucs4 = "u"
+    elif debug:
+        # Debug builds can also load "normal" extension modules.
+        # We can also assume no UCS-4 or pymalloc requirement.
+        abis.append(f"cp{version}")
+    abis.insert(
+        0,
+        "cp{version}{debug}{pymalloc}{ucs4}".format(
+            version=version, debug=debug, pymalloc=pymalloc, ucs4=ucs4
+        ),
+    )
+    return abis
+
+
+def cpython_tags(
+    python_version: Optional[PythonVersion] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
+    """
+    Yields the tags for a CPython interpreter.
+
+    The tags consist of:
+    - cp<python_version>-<abi>-<platform>
+    - cp<python_version>-abi3-<platform>
+    - cp<python_version>-none-<platform>
+    - cp<less than python_version>-abi3-<platform>  # Older Python versions down to 3.2.
+
+    If python_version only specifies a major version then user-provided ABIs and
+    the 'none' ABItag will be used.
+
+    If 'abi3' or 'none' are specified in 'abis' then they will be yielded at
+    their normal position and not at the beginning.
+    """
+    if not python_version:
+        python_version = sys.version_info[:2]
+
+    interpreter = f"cp{_version_nodot(python_version[:2])}"
+
+    if abis is None:
+        if len(python_version) > 1:
+            abis = _cpython_abis(python_version, warn)
+        else:
+            abis = []
+    abis = list(abis)
+    # 'abi3' and 'none' are explicitly handled later.
+    for explicit_abi in ("abi3", "none"):
+        try:
+            abis.remove(explicit_abi)
+        except ValueError:
+            pass
+
+    platforms = list(platforms or platform_tags())
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+    if _abi3_applies(python_version):
+        yield from (Tag(interpreter, "abi3", platform_) for platform_ in platforms)
+    yield from (Tag(interpreter, "none", platform_) for platform_ in platforms)
+
+    if _abi3_applies(python_version):
+        for minor_version in range(python_version[1] - 1, 1, -1):
+            for platform_ in platforms:
+                interpreter = "cp{version}".format(
+                    version=_version_nodot((python_version[0], minor_version))
+                )
+                yield Tag(interpreter, "abi3", platform_)
+
+
+def _generic_abi() -> Iterator[str]:
+    abi = sysconfig.get_config_var("SOABI")
+    if abi:
+        yield _normalize_string(abi)
+
+
+def generic_tags(
+    interpreter: Optional[str] = None,
+    abis: Optional[Iterable[str]] = None,
+    platforms: Optional[Iterable[str]] = None,
+    *,
+    warn: bool = False,
+) -> Iterator[Tag]:
+    """
+    Yields the tags for a generic interpreter.
+
+    The tags consist of:
+    - <interpreter>-<abi>-<platform>
+
+    The "none" ABI will be added if it was not explicitly provided.
+    """
+    if not interpreter:
+        interp_name = interpreter_name()
+        interp_version = interpreter_version(warn=warn)
+        interpreter = "".join([interp_name, interp_version])
+    if abis is None:
+        abis = _generic_abi()
+    platforms = list(platforms or platform_tags())
+    abis = list(abis)
+    if "none" not in abis:
+        abis.append("none")
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+
+
+def _py_interpreter_range(py_version: PythonVersion) -> Iterator[str]:
+    """
+    Yields Python versions in descending order.
+
+    After the latest version, the major-only version will be yielded, and then
+    all previous versions of that major version.
+    """
+    if len(py_version) > 1:
+        yield f"py{_version_nodot(py_version[:2])}"
+    yield f"py{py_version[0]}"
+    if len(py_version) > 1:
+        for minor in range(py_version[1] - 1, -1, -1):
+            yield f"py{_version_nodot((py_version[0], minor))}"
+
+
+def compatible_tags(
+    python_version: Optional[PythonVersion] = None,
+    interpreter: Optional[str] = None,
+    platforms: Optional[Iterable[str]] = None,
+) -> Iterator[Tag]:
+    """
+    Yields the sequence of tags that are compatible with a specific version of Python.
+
+    The tags consist of:
+    - py*-none-<platform>
+    - <interpreter>-none-any  # ... if `interpreter` is provided.
+    - py*-none-any
+    """
+    if not python_version:
+        python_version = sys.version_info[:2]
+    platforms = list(platforms or platform_tags())
+    for version in _py_interpreter_range(python_version):
+        for platform_ in platforms:
+            yield Tag(version, "none", platform_)
+    if interpreter:
+        yield Tag(interpreter, "none", "any")
+    for version in _py_interpreter_range(python_version):
+        yield Tag(version, "none", "any")
+
+
+def _mac_arch(arch: str, is_32bit: bool = _32_BIT_INTERPRETER) -> str:
+    if not is_32bit:
+        return arch
+
+    if arch.startswith("ppc"):
+        return "ppc"
+
+    return "i386"
+
+
+def _mac_binary_formats(version: MacVersion, cpu_arch: str) -> List[str]:
+    formats = [cpu_arch]
+    if cpu_arch == "x86_64":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat64", "fat32"])
+
+    elif cpu_arch == "i386":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat32", "fat"])
+
+    elif cpu_arch == "ppc64":
+        # TODO: Need to care about 32-bit PPC for ppc64 through 10.2?
+        if version > (10, 5) or version < (10, 4):
+            return []
+        formats.append("fat64")
+
+    elif cpu_arch == "ppc":
+        if version > (10, 6):
+            return []
+        formats.extend(["fat32", "fat"])
+
+    if cpu_arch in {"arm64", "x86_64"}:
+        formats.append("universal2")
+
+    if cpu_arch in {"x86_64", "i386", "ppc64", "ppc", "intel"}:
+        formats.append("universal")
+
+    return formats
+
+
+def mac_platforms(
+    version: Optional[MacVersion] = None, arch: Optional[str] = None
+) -> Iterator[str]:
+    """
+    Yields the platform tags for a macOS system.
+
+    The `version` parameter is a two-item tuple specifying the macOS version to
+    generate platform tags for. The `arch` parameter is the CPU architecture to
+    generate platform tags for. Both parameters default to the appropriate value
+    for the current system.
+    """
+    version_str, _, cpu_arch = platform.mac_ver()
+    if version is None:
+        version = cast("MacVersion", tuple(map(int, version_str.split(".")[:2])))
+    else:
+        version = version
+    if arch is None:
+        arch = _mac_arch(cpu_arch)
+    else:
+        arch = arch
+
+    if (10, 0) <= version and version < (11, 0):
+        # Prior to Mac OS 11, each yearly release of Mac OS bumped the
+        # "minor" version number.  The major version was always 10.
+        for minor_version in range(version[1], -1, -1):
+            compat_version = 10, minor_version
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=10, minor=minor_version, binary_format=binary_format
+                )
+
+    if version >= (11, 0):
+        # Starting with Mac OS 11, each yearly release bumps the major version
+        # number.   The minor versions are now the midyear updates.
+        for major_version in range(version[0], 10, -1):
+            compat_version = major_version, 0
+            binary_formats = _mac_binary_formats(compat_version, arch)
+            for binary_format in binary_formats:
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=major_version, minor=0, binary_format=binary_format
+                )
+
+    if version >= (11, 0):
+        # Mac OS 11 on x86_64 is compatible with binaries from previous releases.
+        # Arm64 support was introduced in 11.0, so no Arm binaries from previous
+        # releases exist.
+        #
+        # However, the "universal2" binary format can have a
+        # macOS version earlier than 11.0 when the x86_64 part of the binary supports
+        # that version of macOS.
+        if arch == "x86_64":
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_formats = _mac_binary_formats(compat_version, arch)
+                for binary_format in binary_formats:
+                    yield "macosx_{major}_{minor}_{binary_format}".format(
+                        major=compat_version[0],
+                        minor=compat_version[1],
+                        binary_format=binary_format,
+                    )
+        else:
+            for minor_version in range(16, 3, -1):
+                compat_version = 10, minor_version
+                binary_format = "universal2"
+                yield "macosx_{major}_{minor}_{binary_format}".format(
+                    major=compat_version[0],
+                    minor=compat_version[1],
+                    binary_format=binary_format,
+                )
+
+
+def _linux_platforms(is_32bit: bool = _32_BIT_INTERPRETER) -> Iterator[str]:
+    linux = _normalize_string(sysconfig.get_platform())
+    if is_32bit:
+        if linux == "linux_x86_64":
+            linux = "linux_i686"
+        elif linux == "linux_aarch64":
+            linux = "linux_armv7l"
+    _, arch = linux.split("_", 1)
+    yield from _manylinux.platform_tags(linux, arch)
+    yield from _musllinux.platform_tags(arch)
+    yield linux
+
+
+def _generic_platforms() -> Iterator[str]:
+    yield _normalize_string(sysconfig.get_platform())
+
+
+def platform_tags() -> Iterator[str]:
+    """
+    Provides the platform tags for this installation.
+    """
+    if platform.system() == "Darwin":
+        return mac_platforms()
+    elif platform.system() == "Linux":
+        return _linux_platforms()
+    else:
+        return _generic_platforms()
+
+
+def interpreter_name() -> str:
+    """
+    Returns the name of the running interpreter.
+    """
+    name = sys.implementation.name
+    return INTERPRETER_SHORT_NAMES.get(name) or name
+
+
+def interpreter_version(*, warn: bool = False) -> str:
+    """
+    Returns the version of the running interpreter.
+    """
+    version = _get_config_var("py_version_nodot", warn=warn)
+    if version:
+        version = str(version)
+    else:
+        version = _version_nodot(sys.version_info[:2])
+    return version
+
+
+def _version_nodot(version: PythonVersion) -> str:
+    return "".join(map(str, version))
+
+
+def sys_tags(*, warn: bool = False) -> Iterator[Tag]:
+    """
+    Returns the sequence of tag triples for the running interpreter.
+
+    The order of the sequence corresponds to priority order for the
+    interpreter, from most to least important.
+    """
+
+    interp_name = interpreter_name()
+    if interp_name == "cp":
+        yield from cpython_tags(warn=warn)
+    else:
+        yield from generic_tags()
+
+    if interp_name == "pp":
+        yield from compatible_tags(interpreter="pp3")
+    else:
+        yield from compatible_tags()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/utils.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/utils.py
new file mode 100644
index 0000000..bab11b8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/utils.py
@@ -0,0 +1,136 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import re
+from typing import FrozenSet, NewType, Tuple, Union, cast
+
+from .tags import Tag, parse_tag
+from .version import InvalidVersion, Version
+
+BuildTag = Union[Tuple[()], Tuple[int, str]]
+NormalizedName = NewType("NormalizedName", str)
+
+
+class InvalidWheelFilename(ValueError):
+    """
+    An invalid wheel filename was found, users should refer to PEP 427.
+    """
+
+
+class InvalidSdistFilename(ValueError):
+    """
+    An invalid sdist filename was found, users should refer to the packaging user guide.
+    """
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+# PEP 427: The build number must start with a digit.
+_build_tag_regex = re.compile(r"(\d+)(.*)")
+
+
+def canonicalize_name(name: str) -> NormalizedName:
+    # This is taken from PEP 503.
+    value = _canonicalize_regex.sub("-", name).lower()
+    return cast(NormalizedName, value)
+
+
+def canonicalize_version(version: Union[Version, str]) -> str:
+    """
+    This is very similar to Version.__str__, but has one subtle difference
+    with the way it handles the release segment.
+    """
+    if isinstance(version, str):
+        try:
+            parsed = Version(version)
+        except InvalidVersion:
+            # Legacy versions cannot be normalized
+            return version
+    else:
+        parsed = version
+
+    parts = []
+
+    # Epoch
+    if parsed.epoch != 0:
+        parts.append(f"{parsed.epoch}!")
+
+    # Release segment
+    # NB: This strips trailing '.0's to normalize
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in parsed.release)))
+
+    # Pre-release
+    if parsed.pre is not None:
+        parts.append("".join(str(x) for x in parsed.pre))
+
+    # Post-release
+    if parsed.post is not None:
+        parts.append(f".post{parsed.post}")
+
+    # Development release
+    if parsed.dev is not None:
+        parts.append(f".dev{parsed.dev}")
+
+    # Local version segment
+    if parsed.local is not None:
+        parts.append(f"+{parsed.local}")
+
+    return "".join(parts)
+
+
+def parse_wheel_filename(
+    filename: str,
+) -> Tuple[NormalizedName, Version, BuildTag, FrozenSet[Tag]]:
+    if not filename.endswith(".whl"):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (extension must be '.whl'): {filename}"
+        )
+
+    filename = filename[:-4]
+    dashes = filename.count("-")
+    if dashes not in (4, 5):
+        raise InvalidWheelFilename(
+            f"Invalid wheel filename (wrong number of parts): {filename}"
+        )
+
+    parts = filename.split("-", dashes - 2)
+    name_part = parts[0]
+    # See PEP 427 for the rules on escaping the project name
+    if "__" in name_part or re.match(r"^[\w\d._]*$", name_part, re.UNICODE) is None:
+        raise InvalidWheelFilename(f"Invalid project name: {filename}")
+    name = canonicalize_name(name_part)
+    version = Version(parts[1])
+    if dashes == 5:
+        build_part = parts[2]
+        build_match = _build_tag_regex.match(build_part)
+        if build_match is None:
+            raise InvalidWheelFilename(
+                f"Invalid build number: {build_part} in '{filename}'"
+            )
+        build = cast(BuildTag, (int(build_match.group(1)), build_match.group(2)))
+    else:
+        build = ()
+    tags = parse_tag(parts[-1])
+    return (name, version, build, tags)
+
+
+def parse_sdist_filename(filename: str) -> Tuple[NormalizedName, Version]:
+    if filename.endswith(".tar.gz"):
+        file_stem = filename[: -len(".tar.gz")]
+    elif filename.endswith(".zip"):
+        file_stem = filename[: -len(".zip")]
+    else:
+        raise InvalidSdistFilename(
+            f"Invalid sdist filename (extension must be '.tar.gz' or '.zip'):"
+            f" {filename}"
+        )
+
+    # We are requiring a PEP 440 version, which cannot contain dashes,
+    # so we split on the last dash.
+    name_part, sep, version_part = file_stem.rpartition("-")
+    if not sep:
+        raise InvalidSdistFilename(f"Invalid sdist filename: {filename}")
+
+    name = canonicalize_name(name_part)
+    version = Version(version_part)
+    return (name, version)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/packaging/version.py b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/version.py
new file mode 100644
index 0000000..de9a09a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/packaging/version.py
@@ -0,0 +1,504 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+import collections
+import itertools
+import re
+import warnings
+from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
+
+from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
+
+__all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
+
+InfiniteTypes = Union[InfinityType, NegativeInfinityType]
+PrePostDevType = Union[InfiniteTypes, Tuple[str, int]]
+SubLocalType = Union[InfiniteTypes, int, str]
+LocalType = Union[
+    NegativeInfinityType,
+    Tuple[
+        Union[
+            SubLocalType,
+            Tuple[SubLocalType, str],
+            Tuple[NegativeInfinityType, SubLocalType],
+        ],
+        ...,
+    ],
+]
+CmpKey = Tuple[
+    int, Tuple[int, ...], PrePostDevType, PrePostDevType, PrePostDevType, LocalType
+]
+LegacyCmpKey = Tuple[int, Tuple[str, ...]]
+VersionComparisonMethod = Callable[
+    [Union[CmpKey, LegacyCmpKey], Union[CmpKey, LegacyCmpKey]], bool
+]
+
+_Version = collections.namedtuple(
+    "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
+)
+
+
+def parse(version: str) -> Union["LegacyVersion", "Version"]:
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion:
+    _key: Union[CmpKey, LegacyCmpKey]
+
+    def __hash__(self) -> int:
+        return hash(self._key)
+
+    # Please keep the duplicated `isinstance` check
+    # in the six comparisons hereunder
+    # unless you find a way to avoid adding overhead function calls.
+    def __lt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key < other._key
+
+    def __le__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key <= other._key
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key == other._key
+
+    def __ge__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key >= other._key
+
+    def __gt__(self, other: "_BaseVersion") -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key > other._key
+
+    def __ne__(self, other: object) -> bool:
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return self._key != other._key
+
+
+class LegacyVersion(_BaseVersion):
+    def __init__(self, version: str) -> None:
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+        warnings.warn(
+            "Creating a LegacyVersion has been deprecated and will be "
+            "removed in the next major release",
+            DeprecationWarning,
+        )
+
+    def __str__(self) -> str:
+        return self._version
+
+    def __repr__(self) -> str:
+        return f"<LegacyVersion('{self}')>"
+
+    @property
+    def public(self) -> str:
+        return self._version
+
+    @property
+    def base_version(self) -> str:
+        return self._version
+
+    @property
+    def epoch(self) -> int:
+        return -1
+
+    @property
+    def release(self) -> None:
+        return None
+
+    @property
+    def pre(self) -> None:
+        return None
+
+    @property
+    def post(self) -> None:
+        return None
+
+    @property
+    def dev(self) -> None:
+        return None
+
+    @property
+    def local(self) -> None:
+        return None
+
+    @property
+    def is_prerelease(self) -> bool:
+        return False
+
+    @property
+    def is_postrelease(self) -> bool:
+        return False
+
+    @property
+    def is_devrelease(self) -> bool:
+        return False
+
+
+_legacy_version_component_re = re.compile(r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE)
+
+_legacy_version_replacement_map = {
+    "pre": "c",
+    "preview": "c",
+    "-": "final-",
+    "rc": "c",
+    "dev": "@",
+}
+
+
+def _parse_version_parts(s: str) -> Iterator[str]:
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version: str) -> LegacyCmpKey:
+
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts: List[str] = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+
+    return epoch, tuple(parts)
+
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    def __init__(self, version: str) -> None:
+
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion(f"Invalid version: '{version}'")
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
+            post=_parse_letter_version(
+                match.group("post_l"), match.group("post_n1") or match.group("post_n2")
+            ),
+            dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self) -> str:
+        return f"<Version('{self}')>"
+
+    def __str__(self) -> str:
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append(f"{self.epoch}!")
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        # Pre-release
+        if self.pre is not None:
+            parts.append("".join(str(x) for x in self.pre))
+
+        # Post-release
+        if self.post is not None:
+            parts.append(f".post{self.post}")
+
+        # Development release
+        if self.dev is not None:
+            parts.append(f".dev{self.dev}")
+
+        # Local version segment
+        if self.local is not None:
+            parts.append(f"+{self.local}")
+
+        return "".join(parts)
+
+    @property
+    def epoch(self) -> int:
+        _epoch: int = self._version.epoch
+        return _epoch
+
+    @property
+    def release(self) -> Tuple[int, ...]:
+        _release: Tuple[int, ...] = self._version.release
+        return _release
+
+    @property
+    def pre(self) -> Optional[Tuple[str, int]]:
+        _pre: Optional[Tuple[str, int]] = self._version.pre
+        return _pre
+
+    @property
+    def post(self) -> Optional[int]:
+        return self._version.post[1] if self._version.post else None
+
+    @property
+    def dev(self) -> Optional[int]:
+        return self._version.dev[1] if self._version.dev else None
+
+    @property
+    def local(self) -> Optional[str]:
+        if self._version.local:
+            return ".".join(str(x) for x in self._version.local)
+        else:
+            return None
+
+    @property
+    def public(self) -> str:
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self) -> str:
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append(f"{self.epoch}!")
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        return "".join(parts)
+
+    @property
+    def is_prerelease(self) -> bool:
+        return self.dev is not None or self.pre is not None
+
+    @property
+    def is_postrelease(self) -> bool:
+        return self.post is not None
+
+    @property
+    def is_devrelease(self) -> bool:
+        return self.dev is not None
+
+    @property
+    def major(self) -> int:
+        return self.release[0] if len(self.release) >= 1 else 0
+
+    @property
+    def minor(self) -> int:
+        return self.release[1] if len(self.release) >= 2 else 0
+
+    @property
+    def micro(self) -> int:
+        return self.release[2] if len(self.release) >= 3 else 0
+
+
+def _parse_letter_version(
+    letter: str, number: Union[str, bytes, SupportsInt]
+) -> Optional[Tuple[str, int]]:
+
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+    return None
+
+
+_local_version_separators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local: str) -> Optional[LocalType]:
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_separators.split(local)
+        )
+    return None
+
+
+def _cmpkey(
+    epoch: int,
+    release: Tuple[int, ...],
+    pre: Optional[Tuple[str, int]],
+    post: Optional[Tuple[str, int]],
+    dev: Optional[Tuple[str, int]],
+    local: Optional[Tuple[SubLocalType]],
+) -> CmpKey:
+
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    _release = tuple(
+        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        _pre: PrePostDevType = NegativeInfinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        _pre = Infinity
+    else:
+        _pre = pre
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        _post: PrePostDevType = NegativeInfinity
+
+    else:
+        _post = post
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        _dev: PrePostDevType = Infinity
+
+    else:
+        _dev = dev
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        _local: LocalType = NegativeInfinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        _local = tuple(
+            (i, "") if isinstance(i, int) else (NegativeInfinity, i) for i in local
+        )
+
+    return epoch, _release, _pre, _post, _dev, _local
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__init__.py
new file mode 100644
index 0000000..38ea0f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__init__.py
@@ -0,0 +1,6 @@
+"""Wrappers to build Python packages using PEP 517 hooks
+"""
+
+__version__ = '0.13.0'
+
+from .wrappers import *  # noqa: F401, F403
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/_compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/_compat.cpython-39.pyc
new file mode 100644
index 0000000..fa27646
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/_compat.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-39.pyc
new file mode 100644
index 0000000..9c646ae
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/build.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-39.pyc
new file mode 100644
index 0000000..8335ca0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/check.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-39.pyc
new file mode 100644
index 0000000..d57bda3
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/colorlog.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/dirtools.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/dirtools.cpython-39.pyc
new file mode 100644
index 0000000..8940ca1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/dirtools.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-39.pyc
new file mode 100644
index 0000000..72c1e44
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/envbuild.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/meta.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/meta.cpython-39.pyc
new file mode 100644
index 0000000..3eced08
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/meta.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-39.pyc
new file mode 100644
index 0000000..1be6a1c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/__pycache__/wrappers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/_compat.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/_compat.py
new file mode 100644
index 0000000..95e509c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/_compat.py
@@ -0,0 +1,8 @@
+__all__ = ("tomllib",)
+
+import sys
+
+if sys.version_info >= (3, 11):
+    import tomllib
+else:
+    from pip._vendor import tomli as tomllib
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/build.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/build.py
new file mode 100644
index 0000000..b30909c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/build.py
@@ -0,0 +1,126 @@
+"""Build a project using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+import shutil
+import tempfile
+
+from ._compat import tomllib
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def validate_system(system):
+    """
+    Ensure build system has the requisite fields.
+    """
+    required = {'requires', 'build-backend'}
+    if not (required <= set(system)):
+        message = "Missing required fields: {missing}".format(
+            missing=required-set(system),
+        )
+        raise ValueError(message)
+
+
+def load_system(source_dir):
+    """
+    Load the build system from a source dir (pyproject.toml).
+    """
+    pyproject = os.path.join(source_dir, 'pyproject.toml')
+    with open(pyproject, 'rb') as f:
+        pyproject_data = tomllib.load(f)
+    return pyproject_data['build-system']
+
+
+def compat_system(source_dir):
+    """
+    Given a source dir, attempt to get a build system backend
+    and requirements from pyproject.toml. Fallback to
+    setuptools but only if the file was not found or a build
+    system was not indicated.
+    """
+    try:
+        system = load_system(source_dir)
+    except (FileNotFoundError, KeyError):
+        system = {}
+    system.setdefault(
+        'build-backend',
+        'setuptools.build_meta:__legacy__',
+    )
+    system.setdefault('requires', ['setuptools', 'wheel'])
+    return system
+
+
+def _do_build(hooks, env, dist, dest):
+    get_requires_name = 'get_requires_for_build_{dist}'.format(**locals())
+    get_requires = getattr(hooks, get_requires_name)
+    reqs = get_requires({})
+    log.info('Got build requires: %s', reqs)
+
+    env.pip_install(reqs)
+    log.info('Installed dynamic build dependencies')
+
+    with tempfile.TemporaryDirectory() as td:
+        log.info('Trying to build %s in %s', dist, td)
+        build_name = 'build_{dist}'.format(**locals())
+        build = getattr(hooks, build_name)
+        filename = build(td, {})
+        source = os.path.join(td, filename)
+        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
+
+
+def build(source_dir, dist, dest=None, system=None):
+    system = system or load_system(source_dir)
+    dest = os.path.join(source_dir, dest or 'dist')
+    os.makedirs(dest, exist_ok=True)
+
+    validate_system(system)
+    hooks = Pep517HookCaller(
+        source_dir, system['build-backend'], system.get('backend-path')
+    )
+
+    with BuildEnvironment() as env:
+        env.pip_install(system['requires'])
+        _do_build(hooks, env, dist, dest)
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'source_dir',
+    help="A directory containing pyproject.toml",
+)
+parser.add_argument(
+    '--binary', '-b',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--source', '-s',
+    action='store_true',
+    default=False,
+)
+parser.add_argument(
+    '--out-dir', '-o',
+    help="Destination in which to save the builds relative to source dir",
+)
+
+
+def main(args):
+    log.warning('pep517.build is deprecated. '
+                'Consider switching to https://pypi.org/project/build/')
+
+    # determine which dists to build
+    dists = list(filter(None, (
+        'sdist' if args.source or not args.binary else None,
+        'wheel' if args.binary or not args.source else None,
+    )))
+
+    for dist in dists:
+        build(args.source_dir, dist, args.out_dir)
+
+
+if __name__ == '__main__':
+    main(parser.parse_args())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/check.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/check.py
new file mode 100644
index 0000000..b79f627
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/check.py
@@ -0,0 +1,207 @@
+"""Check a project and backend by attempting to build using PEP 517 hooks.
+"""
+import argparse
+import logging
+import os
+import shutil
+import sys
+import tarfile
+import zipfile
+from os.path import isfile
+from os.path import join as pjoin
+from subprocess import CalledProcessError
+from tempfile import mkdtemp
+
+from ._compat import tomllib
+from .colorlog import enable_colourful_output
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def check_build_sdist(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_sdist({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build sdist in %s', td)
+        try:
+            try:
+                filename = hooks.build_sdist(td, {})
+                log.info('build_sdist returned %r', filename)
+            except Exception:
+                log.info('Failure in build_sdist', exc_info=True)
+                return False
+
+            if not filename.endswith('.tar.gz'):
+                log.error(
+                    "Filename %s doesn't have .tar.gz extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if tarfile.is_tarfile(path):
+                log.info("Output file is a tar file")
+            else:
+                log.error("Output file is not a tar file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check_build_wheel(hooks, build_sys_requires):
+    with BuildEnvironment() as env:
+        try:
+            env.pip_install(build_sys_requires)
+            log.info('Installed static build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install static build dependencies')
+            return False
+
+        try:
+            reqs = hooks.get_requires_for_build_wheel({})
+            log.info('Got build requires: %s', reqs)
+        except Exception:
+            log.error('Failure in get_requires_for_build_sdist', exc_info=True)
+            return False
+
+        try:
+            env.pip_install(reqs)
+            log.info('Installed dynamic build dependencies')
+        except CalledProcessError:
+            log.error('Failed to install dynamic build dependencies')
+            return False
+
+        td = mkdtemp()
+        log.info('Trying to build wheel in %s', td)
+        try:
+            try:
+                filename = hooks.build_wheel(td, {})
+                log.info('build_wheel returned %r', filename)
+            except Exception:
+                log.info('Failure in build_wheel', exc_info=True)
+                return False
+
+            if not filename.endswith('.whl'):
+                log.error("Filename %s doesn't have .whl extension", filename)
+                return False
+
+            path = pjoin(td, filename)
+            if isfile(path):
+                log.info("Output file %s exists", path)
+            else:
+                log.error("Output file %s does not exist", path)
+                return False
+
+            if zipfile.is_zipfile(path):
+                log.info("Output file is a zip file")
+            else:
+                log.error("Output file is not a zip file")
+                return False
+
+        finally:
+            shutil.rmtree(td)
+
+        return True
+
+
+def check(source_dir):
+    pyproject = pjoin(source_dir, 'pyproject.toml')
+    if isfile(pyproject):
+        log.info('Found pyproject.toml')
+    else:
+        log.error('Missing pyproject.toml')
+        return False
+
+    try:
+        with open(pyproject, 'rb') as f:
+            pyproject_data = tomllib.load(f)
+        # Ensure the mandatory data can be loaded
+        buildsys = pyproject_data['build-system']
+        requires = buildsys['requires']
+        backend = buildsys['build-backend']
+        backend_path = buildsys.get('backend-path')
+        log.info('Loaded pyproject.toml')
+    except (tomllib.TOMLDecodeError, KeyError):
+        log.error("Invalid pyproject.toml", exc_info=True)
+        return False
+
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    sdist_ok = check_build_sdist(hooks, requires)
+    wheel_ok = check_build_wheel(hooks, requires)
+
+    if not sdist_ok:
+        log.warning('Sdist checks failed; scroll up to see')
+    if not wheel_ok:
+        log.warning('Wheel checks failed')
+
+    return sdist_ok
+
+
+def main(argv=None):
+    log.warning('pep517.check is deprecated. '
+                'Consider switching to https://pypi.org/project/build/')
+
+    ap = argparse.ArgumentParser()
+    ap.add_argument(
+        'source_dir',
+        help="A directory containing pyproject.toml")
+    args = ap.parse_args(argv)
+
+    enable_colourful_output()
+
+    ok = check(args.source_dir)
+
+    if ok:
+        print(ansi('Checks passed', 'green'))
+    else:
+        print(ansi('Checks failed', 'red'))
+        sys.exit(1)
+
+
+ansi_codes = {
+    'reset': '\x1b[0m',
+    'bold': '\x1b[1m',
+    'red': '\x1b[31m',
+    'green': '\x1b[32m',
+}
+
+
+def ansi(s, attr):
+    if os.name != 'nt' and sys.stdout.isatty():
+        return ansi_codes[attr] + str(s) + ansi_codes['reset']
+    else:
+        return str(s)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/colorlog.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/colorlog.py
new file mode 100644
index 0000000..66310a7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/colorlog.py
@@ -0,0 +1,113 @@
+"""Nicer log formatting with colours.
+
+Code copied from Tornado, Apache licensed.
+"""
+# Copyright 2012 Facebook
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+import logging
+import sys
+
+try:
+    import curses
+except ImportError:
+    curses = None
+
+
+def _stderr_supports_color():
+    color = False
+    if curses and hasattr(sys.stderr, 'isatty') and sys.stderr.isatty():
+        try:
+            curses.setupterm()
+            if curses.tigetnum("colors") > 0:
+                color = True
+        except Exception:
+            pass
+    return color
+
+
+class LogFormatter(logging.Formatter):
+    """Log formatter with colour support
+    """
+    DEFAULT_COLORS = {
+        logging.INFO: 2,  # Green
+        logging.WARNING: 3,  # Yellow
+        logging.ERROR: 1,  # Red
+        logging.CRITICAL: 1,
+    }
+
+    def __init__(self, color=True, datefmt=None):
+        r"""
+        :arg bool color: Enables color support.
+        :arg string fmt: Log message format.
+        It will be applied to the attributes dict of log records. The
+        text between ``%(color)s`` and ``%(end_color)s`` will be colored
+        depending on the level if color support is on.
+        :arg dict colors: color mappings from logging level to terminal color
+        code
+        :arg string datefmt: Datetime format.
+        Used for formatting ``(asctime)`` placeholder in ``prefix_fmt``.
+        .. versionchanged:: 3.2
+        Added ``fmt`` and ``datefmt`` arguments.
+        """
+        logging.Formatter.__init__(self, datefmt=datefmt)
+        self._colors = {}
+        if color and _stderr_supports_color():
+            # The curses module has some str/bytes confusion in
+            # python3. Until version 3.2.3, most methods return
+            # bytes, but only accept strings. In addition, we want to
+            # output these strings with the logging module, which
+            # works with unicode strings. The explicit calls to
+            # unicode() below are harmless in python2 but will do the
+            # right conversion in python 3.
+            fg_color = (curses.tigetstr("setaf") or
+                        curses.tigetstr("setf") or "")
+
+            for levelno, code in self.DEFAULT_COLORS.items():
+                self._colors[levelno] = str(
+                    curses.tparm(fg_color, code), "ascii")
+            self._normal = str(curses.tigetstr("sgr0"), "ascii")
+
+            scr = curses.initscr()
+            self.termwidth = scr.getmaxyx()[1]
+            curses.endwin()
+        else:
+            self._normal = ''
+            # Default width is usually 80, but too wide is
+            # worse than too narrow
+            self.termwidth = 70
+
+    def formatMessage(self, record):
+        mlen = len(record.message)
+        right_text = '{initial}-{name}'.format(initial=record.levelname[0],
+                                               name=record.name)
+        if mlen + len(right_text) < self.termwidth:
+            space = ' ' * (self.termwidth - (mlen + len(right_text)))
+        else:
+            space = '  '
+
+        if record.levelno in self._colors:
+            start_color = self._colors[record.levelno]
+            end_color = self._normal
+        else:
+            start_color = end_color = ''
+
+        return record.message + space + start_color + right_text + end_color
+
+
+def enable_colourful_output(level=logging.INFO):
+    handler = logging.StreamHandler()
+    handler.setFormatter(LogFormatter())
+    logging.root.addHandler(handler)
+    logging.root.setLevel(level)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/dirtools.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/dirtools.py
new file mode 100644
index 0000000..3eff4d8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/dirtools.py
@@ -0,0 +1,19 @@
+import io
+import os
+import zipfile
+
+
+def dir_to_zipfile(root):
+    """Construct an in-memory zip file for a directory."""
+    buffer = io.BytesIO()
+    zip_file = zipfile.ZipFile(buffer, 'w')
+    for root, dirs, files in os.walk(root):
+        for path in dirs:
+            fs_path = os.path.join(root, path)
+            rel_path = os.path.relpath(fs_path, root)
+            zip_file.writestr(rel_path + '/', '')
+        for path in files:
+            fs_path = os.path.join(root, path)
+            rel_path = os.path.relpath(fs_path, root)
+            zip_file.write(fs_path, rel_path)
+    return zip_file
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/envbuild.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/envbuild.py
new file mode 100644
index 0000000..c0415c4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/envbuild.py
@@ -0,0 +1,170 @@
+"""Build wheels/sdists by installing build deps to a temporary environment.
+"""
+
+import logging
+import os
+import shutil
+import sys
+from subprocess import check_call
+from sysconfig import get_paths
+from tempfile import mkdtemp
+
+from ._compat import tomllib
+from .wrappers import LoggerWrapper, Pep517HookCaller
+
+log = logging.getLogger(__name__)
+
+
+def _load_pyproject(source_dir):
+    with open(
+            os.path.join(source_dir, 'pyproject.toml'),
+            'rb',
+            ) as f:
+        pyproject_data = tomllib.load(f)
+    buildsys = pyproject_data['build-system']
+    return (
+        buildsys['requires'],
+        buildsys['build-backend'],
+        buildsys.get('backend-path'),
+    )
+
+
+class BuildEnvironment:
+    """Context manager to install build deps in a simple temporary environment
+
+    Based on code I wrote for pip, which is MIT licensed.
+    """
+    # Copyright (c) 2008-2016 The pip developers (see AUTHORS.txt file)
+    #
+    # Permission is hereby granted, free of charge, to any person obtaining
+    # a copy of this software and associated documentation files (the
+    # "Software"), to deal in the Software without restriction, including
+    # without limitation the rights to use, copy, modify, merge, publish,
+    # distribute, sublicense, and/or sell copies of the Software, and to
+    # permit persons to whom the Software is furnished to do so, subject to
+    # the following conditions:
+    #
+    # The above copyright notice and this permission notice shall be
+    # included in all copies or substantial portions of the Software.
+    #
+    # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+    # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+    # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+    # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+    # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+    # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+    # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+    path = None
+
+    def __init__(self, cleanup=True):
+        self._cleanup = cleanup
+
+    def __enter__(self):
+        self.path = mkdtemp(prefix='pep517-build-env-')
+        log.info('Temporary build environment: %s', self.path)
+
+        self.save_path = os.environ.get('PATH', None)
+        self.save_pythonpath = os.environ.get('PYTHONPATH', None)
+
+        install_scheme = 'nt' if (os.name == 'nt') else 'posix_prefix'
+        install_dirs = get_paths(install_scheme, vars={
+            'base': self.path,
+            'platbase': self.path,
+        })
+
+        scripts = install_dirs['scripts']
+        if self.save_path:
+            os.environ['PATH'] = scripts + os.pathsep + self.save_path
+        else:
+            os.environ['PATH'] = scripts + os.pathsep + os.defpath
+
+        if install_dirs['purelib'] == install_dirs['platlib']:
+            lib_dirs = install_dirs['purelib']
+        else:
+            lib_dirs = install_dirs['purelib'] + os.pathsep + \
+                install_dirs['platlib']
+        if self.save_pythonpath:
+            os.environ['PYTHONPATH'] = lib_dirs + os.pathsep + \
+                self.save_pythonpath
+        else:
+            os.environ['PYTHONPATH'] = lib_dirs
+
+        return self
+
+    def pip_install(self, reqs):
+        """Install dependencies into this env by calling pip in a subprocess"""
+        if not reqs:
+            return
+        log.info('Calling pip to install %s', reqs)
+        cmd = [
+            sys.executable, '-m', 'pip', 'install', '--ignore-installed',
+            '--prefix', self.path] + list(reqs)
+        check_call(
+            cmd,
+            stdout=LoggerWrapper(log, logging.INFO),
+            stderr=LoggerWrapper(log, logging.ERROR),
+        )
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        needs_cleanup = (
+            self._cleanup and
+            self.path is not None and
+            os.path.isdir(self.path)
+        )
+        if needs_cleanup:
+            shutil.rmtree(self.path)
+
+        if self.save_path is None:
+            os.environ.pop('PATH', None)
+        else:
+            os.environ['PATH'] = self.save_path
+
+        if self.save_pythonpath is None:
+            os.environ.pop('PYTHONPATH', None)
+        else:
+            os.environ['PYTHONPATH'] = self.save_pythonpath
+
+
+def build_wheel(source_dir, wheel_dir, config_settings=None):
+    """Build a wheel from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str wheel_dir: Target directory to create wheel in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend, backend_path = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_wheel(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_wheel(wheel_dir, config_settings)
+
+
+def build_sdist(source_dir, sdist_dir, config_settings=None):
+    """Build an sdist from a source directory using PEP 517 hooks.
+
+    :param str source_dir: Source directory containing pyproject.toml
+    :param str sdist_dir: Target directory to place sdist in
+    :param dict config_settings: Options to pass to build backend
+
+    This is a blocking function which will run pip in a subprocess to install
+    build requirements.
+    """
+    if config_settings is None:
+        config_settings = {}
+    requires, backend, backend_path = _load_pyproject(source_dir)
+    hooks = Pep517HookCaller(source_dir, backend, backend_path)
+
+    with BuildEnvironment() as env:
+        env.pip_install(requires)
+        reqs = hooks.get_requires_for_build_sdist(config_settings)
+        env.pip_install(reqs)
+        return hooks.build_sdist(sdist_dir, config_settings)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__init__.py
new file mode 100644
index 0000000..281a356
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__init__.py
@@ -0,0 +1,26 @@
+"""This is a subpackage because the directory is on sys.path for _in_process.py
+
+The subpackage should stay as empty as possible to avoid shadowing modules that
+the backend might import.
+"""
+from contextlib import contextmanager
+from os.path import abspath, dirname
+from os.path import join as pjoin
+
+try:
+    import importlib.resources as resources
+    try:
+        resources.files
+    except AttributeError:
+        # Python 3.8 compatibility
+        def _in_proc_script_path():
+            return resources.path(__package__, '_in_process.py')
+    else:
+        def _in_proc_script_path():
+            return resources.as_file(
+                resources.files(__package__).joinpath('_in_process.py'))
+except ImportError:
+    # Python 3.6 compatibility
+    @contextmanager
+    def _in_proc_script_path():
+        yield pjoin(dirname(abspath(__file__)), '_in_process.py')
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..78d1168
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/_in_process.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/_in_process.cpython-39.pyc
new file mode 100644
index 0000000..df4f753
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/__pycache__/_in_process.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py
new file mode 100644
index 0000000..ae4cf9e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/in_process/_in_process.py
@@ -0,0 +1,351 @@
+"""This is invoked in a subprocess to call the build backend hooks.
+
+It expects:
+- Command line args: hook_name, control_dir
+- Environment variables:
+      PEP517_BUILD_BACKEND=entry.point:spec
+      PEP517_BACKEND_PATH=paths (separated with os.pathsep)
+- control_dir/input.json:
+  - {"kwargs": {...}}
+
+Results:
+- control_dir/output.json
+  - {"return_val": ...}
+"""
+import json
+import os
+import os.path
+import re
+import shutil
+import sys
+import traceback
+from glob import glob
+from importlib import import_module
+from os.path import join as pjoin
+
+# This file is run as a script, and `import wrappers` is not zip-safe, so we
+# include write_json() and read_json() from wrappers.py.
+
+
+def write_json(obj, path, **kwargs):
+    with open(path, 'w', encoding='utf-8') as f:
+        json.dump(obj, f, **kwargs)
+
+
+def read_json(path):
+    with open(path, encoding='utf-8') as f:
+        return json.load(f)
+
+
+class BackendUnavailable(Exception):
+    """Raised if we cannot import the backend"""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+class BackendInvalid(Exception):
+    """Raised if the backend is invalid"""
+    def __init__(self, message):
+        self.message = message
+
+
+class HookMissing(Exception):
+    """Raised if a hook is missing and we are not executing the fallback"""
+    def __init__(self, hook_name=None):
+        super().__init__(hook_name)
+        self.hook_name = hook_name
+
+
+def contained_in(filename, directory):
+    """Test if a file is located within the given directory."""
+    filename = os.path.normcase(os.path.abspath(filename))
+    directory = os.path.normcase(os.path.abspath(directory))
+    return os.path.commonprefix([filename, directory]) == directory
+
+
+def _build_backend():
+    """Find and load the build backend"""
+    # Add in-tree backend directories to the front of sys.path.
+    backend_path = os.environ.get('PEP517_BACKEND_PATH')
+    if backend_path:
+        extra_pathitems = backend_path.split(os.pathsep)
+        sys.path[:0] = extra_pathitems
+
+    ep = os.environ['PEP517_BUILD_BACKEND']
+    mod_path, _, obj_path = ep.partition(':')
+    try:
+        obj = import_module(mod_path)
+    except ImportError:
+        raise BackendUnavailable(traceback.format_exc())
+
+    if backend_path:
+        if not any(
+            contained_in(obj.__file__, path)
+            for path in extra_pathitems
+        ):
+            raise BackendInvalid("Backend was not loaded from backend-path")
+
+    if obj_path:
+        for path_part in obj_path.split('.'):
+            obj = getattr(obj, path_part)
+    return obj
+
+
+def _supported_features():
+    """Return the list of options features supported by the backend.
+
+    Returns a list of strings.
+    The only possible value is 'build_editable'.
+    """
+    backend = _build_backend()
+    features = []
+    if hasattr(backend, "build_editable"):
+        features.append("build_editable")
+    return features
+
+
+def get_requires_for_build_wheel(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_wheel
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+def get_requires_for_build_editable(config_settings):
+    """Invoke the optional get_requires_for_build_editable hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_editable
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+def prepare_metadata_for_build_wheel(
+        metadata_directory, config_settings, _allow_fallback):
+    """Invoke optional prepare_metadata_for_build_wheel
+
+    Implements a fallback by building a wheel if the hook isn't defined,
+    unless _allow_fallback is False in which case HookMissing is raised.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.prepare_metadata_for_build_wheel
+    except AttributeError:
+        if not _allow_fallback:
+            raise HookMissing()
+        whl_basename = backend.build_wheel(metadata_directory, config_settings)
+        return _get_wheel_metadata_from_wheel(whl_basename, metadata_directory,
+                                              config_settings)
+    else:
+        return hook(metadata_directory, config_settings)
+
+
+def prepare_metadata_for_build_editable(
+        metadata_directory, config_settings, _allow_fallback):
+    """Invoke optional prepare_metadata_for_build_editable
+
+    Implements a fallback by building an editable wheel if the hook isn't
+    defined, unless _allow_fallback is False in which case HookMissing is
+    raised.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.prepare_metadata_for_build_editable
+    except AttributeError:
+        if not _allow_fallback:
+            raise HookMissing()
+        try:
+            build_hook = backend.build_editable
+        except AttributeError:
+            raise HookMissing(hook_name='build_editable')
+        else:
+            whl_basename = build_hook(metadata_directory, config_settings)
+            return _get_wheel_metadata_from_wheel(whl_basename,
+                                                  metadata_directory,
+                                                  config_settings)
+    else:
+        return hook(metadata_directory, config_settings)
+
+
+WHEEL_BUILT_MARKER = 'PEP517_ALREADY_BUILT_WHEEL'
+
+
+def _dist_info_files(whl_zip):
+    """Identify the .dist-info folder inside a wheel ZipFile."""
+    res = []
+    for path in whl_zip.namelist():
+        m = re.match(r'[^/\\]+-[^/\\]+\.dist-info/', path)
+        if m:
+            res.append(path)
+    if res:
+        return res
+    raise Exception("No .dist-info folder found in wheel")
+
+
+def _get_wheel_metadata_from_wheel(
+        whl_basename, metadata_directory, config_settings):
+    """Extract the metadata from a wheel.
+
+    Fallback for when the build backend does not
+    define the 'get_wheel_metadata' hook.
+    """
+    from zipfile import ZipFile
+    with open(os.path.join(metadata_directory, WHEEL_BUILT_MARKER), 'wb'):
+        pass  # Touch marker file
+
+    whl_file = os.path.join(metadata_directory, whl_basename)
+    with ZipFile(whl_file) as zipf:
+        dist_info = _dist_info_files(zipf)
+        zipf.extractall(path=metadata_directory, members=dist_info)
+    return dist_info[0].split('/')[0]
+
+
+def _find_already_built_wheel(metadata_directory):
+    """Check for a wheel already built during the get_wheel_metadata hook.
+    """
+    if not metadata_directory:
+        return None
+    metadata_parent = os.path.dirname(metadata_directory)
+    if not os.path.isfile(pjoin(metadata_parent, WHEEL_BUILT_MARKER)):
+        return None
+
+    whl_files = glob(os.path.join(metadata_parent, '*.whl'))
+    if not whl_files:
+        print('Found wheel built marker, but no .whl files')
+        return None
+    if len(whl_files) > 1:
+        print('Found multiple .whl files; unspecified behaviour. '
+              'Will call build_wheel.')
+        return None
+
+    # Exactly one .whl file
+    return whl_files[0]
+
+
+def build_wheel(wheel_directory, config_settings, metadata_directory=None):
+    """Invoke the mandatory build_wheel hook.
+
+    If a wheel was already built in the
+    prepare_metadata_for_build_wheel fallback, this
+    will copy it rather than rebuilding the wheel.
+    """
+    prebuilt_whl = _find_already_built_wheel(metadata_directory)
+    if prebuilt_whl:
+        shutil.copy2(prebuilt_whl, wheel_directory)
+        return os.path.basename(prebuilt_whl)
+
+    return _build_backend().build_wheel(wheel_directory, config_settings,
+                                        metadata_directory)
+
+
+def build_editable(wheel_directory, config_settings, metadata_directory=None):
+    """Invoke the optional build_editable hook.
+
+    If a wheel was already built in the
+    prepare_metadata_for_build_editable fallback, this
+    will copy it rather than rebuilding the wheel.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.build_editable
+    except AttributeError:
+        raise HookMissing()
+    else:
+        prebuilt_whl = _find_already_built_wheel(metadata_directory)
+        if prebuilt_whl:
+            shutil.copy2(prebuilt_whl, wheel_directory)
+            return os.path.basename(prebuilt_whl)
+
+        return hook(wheel_directory, config_settings, metadata_directory)
+
+
+def get_requires_for_build_sdist(config_settings):
+    """Invoke the optional get_requires_for_build_wheel hook
+
+    Returns [] if the hook is not defined.
+    """
+    backend = _build_backend()
+    try:
+        hook = backend.get_requires_for_build_sdist
+    except AttributeError:
+        return []
+    else:
+        return hook(config_settings)
+
+
+class _DummyException(Exception):
+    """Nothing should ever raise this exception"""
+
+
+class GotUnsupportedOperation(Exception):
+    """For internal use when backend raises UnsupportedOperation"""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+def build_sdist(sdist_directory, config_settings):
+    """Invoke the mandatory build_sdist hook."""
+    backend = _build_backend()
+    try:
+        return backend.build_sdist(sdist_directory, config_settings)
+    except getattr(backend, 'UnsupportedOperation', _DummyException):
+        raise GotUnsupportedOperation(traceback.format_exc())
+
+
+HOOK_NAMES = {
+    'get_requires_for_build_wheel',
+    'prepare_metadata_for_build_wheel',
+    'build_wheel',
+    'get_requires_for_build_editable',
+    'prepare_metadata_for_build_editable',
+    'build_editable',
+    'get_requires_for_build_sdist',
+    'build_sdist',
+    '_supported_features',
+}
+
+
+def main():
+    if len(sys.argv) < 3:
+        sys.exit("Needs args: hook_name, control_dir")
+    hook_name = sys.argv[1]
+    control_dir = sys.argv[2]
+    if hook_name not in HOOK_NAMES:
+        sys.exit("Unknown hook: %s" % hook_name)
+    hook = globals()[hook_name]
+
+    hook_input = read_json(pjoin(control_dir, 'input.json'))
+
+    json_out = {'unsupported': False, 'return_val': None}
+    try:
+        json_out['return_val'] = hook(**hook_input['kwargs'])
+    except BackendUnavailable as e:
+        json_out['no_backend'] = True
+        json_out['traceback'] = e.traceback
+    except BackendInvalid as e:
+        json_out['backend_invalid'] = True
+        json_out['backend_error'] = e.message
+    except GotUnsupportedOperation as e:
+        json_out['unsupported'] = True
+        json_out['traceback'] = e.traceback
+    except HookMissing as e:
+        json_out['hook_missing'] = True
+        json_out['missing_hook_name'] = e.hook_name or hook_name
+
+    write_json(json_out, pjoin(control_dir, 'output.json'), indent=2)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/meta.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/meta.py
new file mode 100644
index 0000000..4afc3c0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/meta.py
@@ -0,0 +1,93 @@
+"""Build metadata for a project using PEP 517 hooks.
+"""
+import argparse
+import functools
+import logging
+import os
+import shutil
+import tempfile
+
+try:
+    import importlib.metadata as imp_meta
+except ImportError:
+    import importlib_metadata as imp_meta
+
+try:
+    from zipfile import Path
+except ImportError:
+    from zipp import Path
+
+from .build import compat_system, load_system, validate_system
+from .dirtools import dir_to_zipfile
+from .envbuild import BuildEnvironment
+from .wrappers import Pep517HookCaller, quiet_subprocess_runner
+
+log = logging.getLogger(__name__)
+
+
+def _prep_meta(hooks, env, dest):
+    reqs = hooks.get_requires_for_build_wheel({})
+    log.info('Got build requires: %s', reqs)
+
+    env.pip_install(reqs)
+    log.info('Installed dynamic build dependencies')
+
+    with tempfile.TemporaryDirectory() as td:
+        log.info('Trying to build metadata in %s', td)
+        filename = hooks.prepare_metadata_for_build_wheel(td, {})
+        source = os.path.join(td, filename)
+        shutil.move(source, os.path.join(dest, os.path.basename(filename)))
+
+
+def build(source_dir='.', dest=None, system=None):
+    system = system or load_system(source_dir)
+    dest = os.path.join(source_dir, dest or 'dist')
+    os.makedirs(dest, exist_ok=True)
+    validate_system(system)
+    hooks = Pep517HookCaller(
+        source_dir, system['build-backend'], system.get('backend-path')
+    )
+
+    with hooks.subprocess_runner(quiet_subprocess_runner):
+        with BuildEnvironment() as env:
+            env.pip_install(system['requires'])
+            _prep_meta(hooks, env, dest)
+
+
+def build_as_zip(builder=build):
+    with tempfile.TemporaryDirectory() as out_dir:
+        builder(dest=out_dir)
+        return dir_to_zipfile(out_dir)
+
+
+def load(root):
+    """
+    Given a source directory (root) of a package,
+    return an importlib.metadata.Distribution object
+    with metadata build from that package.
+    """
+    root = os.path.expanduser(root)
+    system = compat_system(root)
+    builder = functools.partial(build, source_dir=root, system=system)
+    path = Path(build_as_zip(builder))
+    return imp_meta.PathDistribution(path)
+
+
+parser = argparse.ArgumentParser()
+parser.add_argument(
+    'source_dir',
+    help="A directory containing pyproject.toml",
+)
+parser.add_argument(
+    '--out-dir', '-o',
+    help="Destination in which to save the builds relative to source dir",
+)
+
+
+def main():
+    args = parser.parse_args()
+    build(args.source_dir, args.out_dir)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pep517/wrappers.py b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/wrappers.py
new file mode 100644
index 0000000..987a62a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pep517/wrappers.py
@@ -0,0 +1,362 @@
+import json
+import os
+import sys
+import tempfile
+import threading
+from contextlib import contextmanager
+from os.path import abspath
+from os.path import join as pjoin
+from subprocess import STDOUT, check_call, check_output
+
+from .in_process import _in_proc_script_path
+
+__all__ = [
+    'BackendUnavailable',
+    'BackendInvalid',
+    'HookMissing',
+    'UnsupportedOperation',
+    'default_subprocess_runner',
+    'quiet_subprocess_runner',
+    'Pep517HookCaller',
+]
+
+
+def write_json(obj, path, **kwargs):
+    with open(path, 'w', encoding='utf-8') as f:
+        json.dump(obj, f, **kwargs)
+
+
+def read_json(path):
+    with open(path, encoding='utf-8') as f:
+        return json.load(f)
+
+
+class BackendUnavailable(Exception):
+    """Will be raised if the backend cannot be imported in the hook process."""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+class BackendInvalid(Exception):
+    """Will be raised if the backend is invalid."""
+    def __init__(self, backend_name, backend_path, message):
+        self.backend_name = backend_name
+        self.backend_path = backend_path
+        self.message = message
+
+
+class HookMissing(Exception):
+    """Will be raised on missing hooks."""
+    def __init__(self, hook_name):
+        super().__init__(hook_name)
+        self.hook_name = hook_name
+
+
+class UnsupportedOperation(Exception):
+    """May be raised by build_sdist if the backend indicates that it can't."""
+    def __init__(self, traceback):
+        self.traceback = traceback
+
+
+def default_subprocess_runner(cmd, cwd=None, extra_environ=None):
+    """The default method of calling the wrapper subprocess."""
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    check_call(cmd, cwd=cwd, env=env)
+
+
+def quiet_subprocess_runner(cmd, cwd=None, extra_environ=None):
+    """A method of calling the wrapper subprocess while suppressing output."""
+    env = os.environ.copy()
+    if extra_environ:
+        env.update(extra_environ)
+
+    check_output(cmd, cwd=cwd, env=env, stderr=STDOUT)
+
+
+def norm_and_check(source_tree, requested):
+    """Normalise and check a backend path.
+
+    Ensure that the requested backend path is specified as a relative path,
+    and resolves to a location under the given source tree.
+
+    Return an absolute version of the requested path.
+    """
+    if os.path.isabs(requested):
+        raise ValueError("paths must be relative")
+
+    abs_source = os.path.abspath(source_tree)
+    abs_requested = os.path.normpath(os.path.join(abs_source, requested))
+    # We have to use commonprefix for Python 2.7 compatibility. So we
+    # normalise case to avoid problems because commonprefix is a character
+    # based comparison :-(
+    norm_source = os.path.normcase(abs_source)
+    norm_requested = os.path.normcase(abs_requested)
+    if os.path.commonprefix([norm_source, norm_requested]) != norm_source:
+        raise ValueError("paths must be inside source tree")
+
+    return abs_requested
+
+
+class Pep517HookCaller:
+    """A wrapper around a source directory to be built with a PEP 517 backend.
+
+    :param source_dir: The path to the source directory, containing
+        pyproject.toml.
+    :param build_backend: The build backend spec, as per PEP 517, from
+        pyproject.toml.
+    :param backend_path: The backend path, as per PEP 517, from pyproject.toml.
+    :param runner: A callable that invokes the wrapper subprocess.
+    :param python_executable: The Python executable used to invoke the backend
+
+    The 'runner', if provided, must expect the following:
+
+    - cmd: a list of strings representing the command and arguments to
+      execute, as would be passed to e.g. 'subprocess.check_call'.
+    - cwd: a string representing the working directory that must be
+      used for the subprocess. Corresponds to the provided source_dir.
+    - extra_environ: a dict mapping environment variable names to values
+      which must be set for the subprocess execution.
+    """
+    def __init__(
+            self,
+            source_dir,
+            build_backend,
+            backend_path=None,
+            runner=None,
+            python_executable=None,
+    ):
+        if runner is None:
+            runner = default_subprocess_runner
+
+        self.source_dir = abspath(source_dir)
+        self.build_backend = build_backend
+        if backend_path:
+            backend_path = [
+                norm_and_check(self.source_dir, p) for p in backend_path
+            ]
+        self.backend_path = backend_path
+        self._subprocess_runner = runner
+        if not python_executable:
+            python_executable = sys.executable
+        self.python_executable = python_executable
+
+    @contextmanager
+    def subprocess_runner(self, runner):
+        """A context manager for temporarily overriding the default subprocess
+        runner.
+        """
+        prev = self._subprocess_runner
+        self._subprocess_runner = runner
+        try:
+            yield
+        finally:
+            self._subprocess_runner = prev
+
+    def _supported_features(self):
+        """Return the list of optional features supported by the backend."""
+        return self._call_hook('_supported_features', {})
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.::
+
+            ["wheel >= 0.25", "setuptools"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_wheel', {
+            'config_settings': config_settings
+        })
+
+    def prepare_metadata_for_build_wheel(
+            self, metadata_directory, config_settings=None,
+            _allow_fallback=True):
+        """Prepare a ``*.dist-info`` folder with metadata for this project.
+
+        Returns the name of the newly created folder.
+
+        If the build backend defines a hook with this name, it will be called
+        in a subprocess. If not, the backend will be asked to build a wheel,
+        and the dist-info extracted from that (unless _allow_fallback is
+        False).
+        """
+        return self._call_hook('prepare_metadata_for_build_wheel', {
+            'metadata_directory': abspath(metadata_directory),
+            'config_settings': config_settings,
+            '_allow_fallback': _allow_fallback,
+        })
+
+    def build_wheel(
+            self, wheel_directory, config_settings=None,
+            metadata_directory=None):
+        """Build a wheel from this project.
+
+        Returns the name of the newly created file.
+
+        In general, this will call the 'build_wheel' hook in the backend.
+        However, if that was previously called by
+        'prepare_metadata_for_build_wheel', and the same metadata_directory is
+        used, the previously built wheel will be copied to wheel_directory.
+        """
+        if metadata_directory is not None:
+            metadata_directory = abspath(metadata_directory)
+        return self._call_hook('build_wheel', {
+            'wheel_directory': abspath(wheel_directory),
+            'config_settings': config_settings,
+            'metadata_directory': metadata_directory,
+        })
+
+    def get_requires_for_build_editable(self, config_settings=None):
+        """Identify packages required for building an editable wheel
+
+        Returns a list of dependency specifications, e.g.::
+
+            ["wheel >= 0.25", "setuptools"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_editable', {
+            'config_settings': config_settings
+        })
+
+    def prepare_metadata_for_build_editable(
+            self, metadata_directory, config_settings=None,
+            _allow_fallback=True):
+        """Prepare a ``*.dist-info`` folder with metadata for this project.
+
+        Returns the name of the newly created folder.
+
+        If the build backend defines a hook with this name, it will be called
+        in a subprocess. If not, the backend will be asked to build an editable
+        wheel, and the dist-info extracted from that (unless _allow_fallback is
+        False).
+        """
+        return self._call_hook('prepare_metadata_for_build_editable', {
+            'metadata_directory': abspath(metadata_directory),
+            'config_settings': config_settings,
+            '_allow_fallback': _allow_fallback,
+        })
+
+    def build_editable(
+            self, wheel_directory, config_settings=None,
+            metadata_directory=None):
+        """Build an editable wheel from this project.
+
+        Returns the name of the newly created file.
+
+        In general, this will call the 'build_editable' hook in the backend.
+        However, if that was previously called by
+        'prepare_metadata_for_build_editable', and the same metadata_directory
+        is used, the previously built wheel will be copied to wheel_directory.
+        """
+        if metadata_directory is not None:
+            metadata_directory = abspath(metadata_directory)
+        return self._call_hook('build_editable', {
+            'wheel_directory': abspath(wheel_directory),
+            'config_settings': config_settings,
+            'metadata_directory': metadata_directory,
+        })
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        """Identify packages required for building a wheel
+
+        Returns a list of dependency specifications, e.g.::
+
+            ["setuptools >= 26"]
+
+        This does not include requirements specified in pyproject.toml.
+        It returns the result of calling the equivalently named hook in a
+        subprocess.
+        """
+        return self._call_hook('get_requires_for_build_sdist', {
+            'config_settings': config_settings
+        })
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        """Build an sdist from this project.
+
+        Returns the name of the newly created file.
+
+        This calls the 'build_sdist' backend hook in a subprocess.
+        """
+        return self._call_hook('build_sdist', {
+            'sdist_directory': abspath(sdist_directory),
+            'config_settings': config_settings,
+        })
+
+    def _call_hook(self, hook_name, kwargs):
+        extra_environ = {'PEP517_BUILD_BACKEND': self.build_backend}
+
+        if self.backend_path:
+            backend_path = os.pathsep.join(self.backend_path)
+            extra_environ['PEP517_BACKEND_PATH'] = backend_path
+
+        with tempfile.TemporaryDirectory() as td:
+            hook_input = {'kwargs': kwargs}
+            write_json(hook_input, pjoin(td, 'input.json'), indent=2)
+
+            # Run the hook in a subprocess
+            with _in_proc_script_path() as script:
+                python = self.python_executable
+                self._subprocess_runner(
+                    [python, abspath(str(script)), hook_name, td],
+                    cwd=self.source_dir,
+                    extra_environ=extra_environ
+                )
+
+            data = read_json(pjoin(td, 'output.json'))
+            if data.get('unsupported'):
+                raise UnsupportedOperation(data.get('traceback', ''))
+            if data.get('no_backend'):
+                raise BackendUnavailable(data.get('traceback', ''))
+            if data.get('backend_invalid'):
+                raise BackendInvalid(
+                    backend_name=self.build_backend,
+                    backend_path=self.backend_path,
+                    message=data.get('backend_error', '')
+                )
+            if data.get('hook_missing'):
+                raise HookMissing(data.get('missing_hook_name') or hook_name)
+            return data['return_val']
+
+
+class LoggerWrapper(threading.Thread):
+    """
+    Read messages from a pipe and redirect them
+    to a logger (see python's logging module).
+    """
+
+    def __init__(self, logger, level):
+        threading.Thread.__init__(self)
+        self.daemon = True
+
+        self.logger = logger
+        self.level = level
+
+        # create the pipe and reader
+        self.fd_read, self.fd_write = os.pipe()
+        self.reader = os.fdopen(self.fd_read)
+
+        self.start()
+
+    def fileno(self):
+        return self.fd_write
+
+    @staticmethod
+    def remove_newline(msg):
+        return msg[:-1] if msg.endswith(os.linesep) else msg
+
+    def run(self):
+        for line in self.reader:
+            self._write(self.remove_newline(line))
+
+    def _write(self, message):
+        self.logger.log(self.level, message)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py
new file mode 100644
index 0000000..4cd562c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__init__.py
@@ -0,0 +1,3296 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pip._vendor import six
+from pip._vendor.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pip._vendor import platformdirs
+from pip._vendor import packaging
+__import__('pip._vendor.packaging.version')
+__import__('pip._vendor.packaging.specifiers')
+__import__('pip._vendor.packaging.requirements')
+__import__('pip._vendor.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 5):
+    raise RuntimeError("Python 3.5 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = '{}.{}'.format(*sys.version_info)
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or platformdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        path = self._get_metadata_path(name)
+        value = self._get(path)
+        if six.PY2:
+            return value
+        try:
+            return value.decode('utf-8')
+        except UnicodeDecodeError as exc:
+            # Include the path in the error message to simplify
+            # troubleshooting, and without changing the exception type.
+            exc.reason += ' in {} file at path: {}'.format(name, path)
+            raise
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.url,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..726a91f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-39.pyc
new file mode 100644
index 0000000..d969e34
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/__pycache__/py31compat.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/py31compat.py b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/py31compat.py
new file mode 100644
index 0000000..a2d3007
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from pip._vendor import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__init__.py
new file mode 100644
index 0000000..9d513dc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__init__.py
@@ -0,0 +1,340 @@
+"""
+Utilities for determining application-specific dirs. See <https://github.com/platformdirs/platformdirs> for details and
+usage.
+"""
+from __future__ import annotations
+
+import os
+import sys
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+if TYPE_CHECKING:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+from .api import PlatformDirsABC
+from .version import __version__, __version_info__
+
+
+def _set_platform_dir_class() -> type[PlatformDirsABC]:
+    if sys.platform == "win32":
+        from pip._vendor.platformdirs.windows import Windows as Result
+    elif sys.platform == "darwin":
+        from pip._vendor.platformdirs.macos import MacOS as Result
+    else:
+        from pip._vendor.platformdirs.unix import Unix as Result
+
+    if os.getenv("ANDROID_DATA") == "/data" and os.getenv("ANDROID_ROOT") == "/system":
+
+        if os.getenv("SHELL") is not None:
+            return Result
+
+        from pip._vendor.platformdirs.android import _android_folder
+
+        if _android_folder() is not None:
+            from pip._vendor.platformdirs.android import Android
+
+            return Android  # return to avoid redefinition of result
+
+    return Result
+
+
+PlatformDirs = _set_platform_dir_class()  #: Currently active platform
+AppDirs = PlatformDirs  #: Backwards compatibility with appdirs
+
+
+def user_data_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: data directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_data_dir
+
+
+def site_data_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    multipath: bool = False,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param multipath: See `roaming <platformdirs.api.PlatformDirsABC.multipath>`.
+    :returns: data directory shared by users
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, multipath=multipath).site_data_dir
+
+
+def user_config_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: config directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_config_dir
+
+
+def site_config_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    multipath: bool = False,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param multipath: See `roaming <platformdirs.api.PlatformDirsABC.multipath>`.
+    :returns: config directory shared by the users
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, multipath=multipath).site_config_dir
+
+
+def user_cache_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `roaming <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: cache directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_cache_dir
+
+
+def user_state_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: state directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_state_dir
+
+
+def user_log_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `roaming <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: log directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_log_dir
+
+
+def user_documents_dir() -> str:
+    """
+    :returns: documents directory tied to the user
+    """
+    return PlatformDirs().user_documents_dir
+
+
+def user_runtime_dir(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> str:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `opinion <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: runtime directory tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_runtime_dir
+
+
+def user_data_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: data path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_data_path
+
+
+def site_data_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    multipath: bool = False,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param multipath: See `multipath <platformdirs.api.PlatformDirsABC.multipath>`.
+    :returns: data path shared by users
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, multipath=multipath).site_data_path
+
+
+def user_config_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: config path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_config_path
+
+
+def site_config_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    multipath: bool = False,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param multipath: See `roaming <platformdirs.api.PlatformDirsABC.multipath>`.
+    :returns: config path shared by the users
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, multipath=multipath).site_config_path
+
+
+def user_cache_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `roaming <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: cache path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_cache_path
+
+
+def user_state_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    roaming: bool = False,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param roaming: See `roaming <platformdirs.api.PlatformDirsABC.version>`.
+    :returns: state path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, roaming=roaming).user_state_path
+
+
+def user_log_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `roaming <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: log path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_log_path
+
+
+def user_documents_path() -> Path:
+    """
+    :returns: documents path tied to the user
+    """
+    return PlatformDirs().user_documents_path
+
+
+def user_runtime_path(
+    appname: str | None = None,
+    appauthor: str | None | Literal[False] = None,
+    version: str | None = None,
+    opinion: bool = True,
+) -> Path:
+    """
+    :param appname: See `appname <platformdirs.api.PlatformDirsABC.appname>`.
+    :param appauthor: See `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`.
+    :param version: See `version <platformdirs.api.PlatformDirsABC.version>`.
+    :param opinion: See `opinion <platformdirs.api.PlatformDirsABC.opinion>`.
+    :returns: runtime path tied to the user
+    """
+    return PlatformDirs(appname=appname, appauthor=appauthor, version=version, opinion=opinion).user_runtime_path
+
+
+__all__ = [
+    "__version__",
+    "__version_info__",
+    "PlatformDirs",
+    "AppDirs",
+    "PlatformDirsABC",
+    "user_data_dir",
+    "user_config_dir",
+    "user_cache_dir",
+    "user_state_dir",
+    "user_log_dir",
+    "user_documents_dir",
+    "user_runtime_dir",
+    "site_data_dir",
+    "site_config_dir",
+    "user_data_path",
+    "user_config_path",
+    "user_cache_path",
+    "user_state_path",
+    "user_log_path",
+    "user_documents_path",
+    "user_runtime_path",
+    "site_data_path",
+    "site_config_path",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__main__.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__main__.py
new file mode 100644
index 0000000..9c54bfb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/__main__.py
@@ -0,0 +1,46 @@
+from __future__ import annotations
+
+from pip._vendor.platformdirs import PlatformDirs, __version__
+
+PROPS = (
+    "user_data_dir",
+    "user_config_dir",
+    "user_cache_dir",
+    "user_state_dir",
+    "user_log_dir",
+    "user_documents_dir",
+    "user_runtime_dir",
+    "site_data_dir",
+    "site_config_dir",
+)
+
+
+def main() -> None:
+    app_name = "MyApp"
+    app_author = "MyCompany"
+
+    print(f"-- platformdirs {__version__} --")
+
+    print("-- app dirs (with optional 'version')")
+    dirs = PlatformDirs(app_name, app_author, version="1.0")
+    for prop in PROPS:
+        print(f"{prop}: {getattr(dirs, prop)}")
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = PlatformDirs(app_name, app_author)
+    for prop in PROPS:
+        print(f"{prop}: {getattr(dirs, prop)}")
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = PlatformDirs(app_name)
+    for prop in PROPS:
+        print(f"{prop}: {getattr(dirs, prop)}")
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = PlatformDirs(app_name, appauthor=False)
+    for prop in PROPS:
+        print(f"{prop}: {getattr(dirs, prop)}")
+
+
+if __name__ == "__main__":
+    main()
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/android.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/android.py
new file mode 100644
index 0000000..eda8093
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/android.py
@@ -0,0 +1,120 @@
+from __future__ import annotations
+
+import os
+import re
+import sys
+from functools import lru_cache
+from typing import cast
+
+from .api import PlatformDirsABC
+
+
+class Android(PlatformDirsABC):
+    """
+    Follows the guidance `from here <https://android.stackexchange.com/a/216132>`_. Makes use of the
+    `appname <platformdirs.api.PlatformDirsABC.appname>` and
+    `version <platformdirs.api.PlatformDirsABC.version>`.
+    """
+
+    @property
+    def user_data_dir(self) -> str:
+        """:return: data directory tied to the user, e.g. ``/data/user/<userid>/<packagename>/files/<AppName>``"""
+        return self._append_app_name_and_version(cast(str, _android_folder()), "files")
+
+    @property
+    def site_data_dir(self) -> str:
+        """:return: data directory shared by users, same as `user_data_dir`"""
+        return self.user_data_dir
+
+    @property
+    def user_config_dir(self) -> str:
+        """
+        :return: config directory tied to the user, e.g. ``/data/user/<userid>/<packagename>/shared_prefs/<AppName>``
+        """
+        return self._append_app_name_and_version(cast(str, _android_folder()), "shared_prefs")
+
+    @property
+    def site_config_dir(self) -> str:
+        """:return: config directory shared by the users, same as `user_config_dir`"""
+        return self.user_config_dir
+
+    @property
+    def user_cache_dir(self) -> str:
+        """:return: cache directory tied to the user, e.g. e.g. ``/data/user/<userid>/<packagename>/cache/<AppName>``"""
+        return self._append_app_name_and_version(cast(str, _android_folder()), "cache")
+
+    @property
+    def user_state_dir(self) -> str:
+        """:return: state directory tied to the user, same as `user_data_dir`"""
+        return self.user_data_dir
+
+    @property
+    def user_log_dir(self) -> str:
+        """
+        :return: log directory tied to the user, same as `user_cache_dir` if not opinionated else ``log`` in it,
+          e.g. ``/data/user/<userid>/<packagename>/cache/<AppName>/log``
+        """
+        path = self.user_cache_dir
+        if self.opinion:
+            path = os.path.join(path, "log")
+        return path
+
+    @property
+    def user_documents_dir(self) -> str:
+        """
+        :return: documents directory tied to the user e.g. ``/storage/emulated/0/Documents``
+        """
+        return _android_documents_folder()
+
+    @property
+    def user_runtime_dir(self) -> str:
+        """
+        :return: runtime directory tied to the user, same as `user_cache_dir` if not opinionated else ``tmp`` in it,
+          e.g. ``/data/user/<userid>/<packagename>/cache/<AppName>/tmp``
+        """
+        path = self.user_cache_dir
+        if self.opinion:
+            path = os.path.join(path, "tmp")
+        return path
+
+
+@lru_cache(maxsize=1)
+def _android_folder() -> str | None:
+    """:return: base folder for the Android OS or None if cannot be found"""
+    try:
+        # First try to get path to android app via pyjnius
+        from jnius import autoclass
+
+        Context = autoclass("android.content.Context")  # noqa: N806
+        result: str | None = Context.getFilesDir().getParentFile().getAbsolutePath()
+    except Exception:
+        # if fails find an android folder looking path on the sys.path
+        pattern = re.compile(r"/data/(data|user/\d+)/(.+)/files")
+        for path in sys.path:
+            if pattern.match(path):
+                result = path.split("/files")[0]
+                break
+        else:
+            result = None
+    return result
+
+
+@lru_cache(maxsize=1)
+def _android_documents_folder() -> str:
+    """:return: documents folder for the Android OS"""
+    # Get directories with pyjnius
+    try:
+        from jnius import autoclass
+
+        Context = autoclass("android.content.Context")  # noqa: N806
+        Environment = autoclass("android.os.Environment")  # noqa: N806
+        documents_dir: str = Context.getExternalFilesDir(Environment.DIRECTORY_DOCUMENTS).getAbsolutePath()
+    except Exception:
+        documents_dir = "/storage/emulated/0/Documents"
+
+    return documents_dir
+
+
+__all__ = [
+    "Android",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/api.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/api.py
new file mode 100644
index 0000000..6f6e2c2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/api.py
@@ -0,0 +1,156 @@
+from __future__ import annotations
+
+import os
+import sys
+from abc import ABC, abstractmethod
+from pathlib import Path
+
+if sys.version_info >= (3, 8):  # pragma: no branch
+    from typing import Literal  # pragma: no cover
+
+
+class PlatformDirsABC(ABC):
+    """
+    Abstract base class for platform directories.
+    """
+
+    def __init__(
+        self,
+        appname: str | None = None,
+        appauthor: str | None | Literal[False] = None,
+        version: str | None = None,
+        roaming: bool = False,
+        multipath: bool = False,
+        opinion: bool = True,
+    ):
+        """
+        Create a new platform directory.
+
+        :param appname: See `appname`.
+        :param appauthor: See `appauthor`.
+        :param version: See `version`.
+        :param roaming: See `roaming`.
+        :param multipath: See `multipath`.
+        :param opinion: See `opinion`.
+        """
+        self.appname = appname  #: The name of application.
+        self.appauthor = appauthor
+        """
+        The name of the app author or distributing body for this application. Typically, it is the owning company name.
+        Defaults to `appname`. You may pass ``False`` to disable it.
+        """
+        self.version = version
+        """
+        An optional version path element to append to the path. You might want to use this if you want multiple versions
+        of your app to be able to run independently. If used, this would typically be ``<major>.<minor>``.
+        """
+        self.roaming = roaming
+        """
+        Whether to use the roaming appdata directory on Windows. That means that for users on a Windows network setup
+        for roaming profiles, this user data will be synced on login (see
+        `here <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>`_).
+        """
+        self.multipath = multipath
+        """
+        An optional parameter only applicable to Unix/Linux which indicates that the entire list of data dirs should be
+        returned. By default, the first item would only be returned.
+        """
+        self.opinion = opinion  #: A flag to indicating to use opinionated values.
+
+    def _append_app_name_and_version(self, *base: str) -> str:
+        params = list(base[1:])
+        if self.appname:
+            params.append(self.appname)
+            if self.version:
+                params.append(self.version)
+        return os.path.join(base[0], *params)
+
+    @property
+    @abstractmethod
+    def user_data_dir(self) -> str:
+        """:return: data directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def site_data_dir(self) -> str:
+        """:return: data directory shared by users"""
+
+    @property
+    @abstractmethod
+    def user_config_dir(self) -> str:
+        """:return: config directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def site_config_dir(self) -> str:
+        """:return: config directory shared by the users"""
+
+    @property
+    @abstractmethod
+    def user_cache_dir(self) -> str:
+        """:return: cache directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def user_state_dir(self) -> str:
+        """:return: state directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def user_log_dir(self) -> str:
+        """:return: log directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def user_documents_dir(self) -> str:
+        """:return: documents directory tied to the user"""
+
+    @property
+    @abstractmethod
+    def user_runtime_dir(self) -> str:
+        """:return: runtime directory tied to the user"""
+
+    @property
+    def user_data_path(self) -> Path:
+        """:return: data path tied to the user"""
+        return Path(self.user_data_dir)
+
+    @property
+    def site_data_path(self) -> Path:
+        """:return: data path shared by users"""
+        return Path(self.site_data_dir)
+
+    @property
+    def user_config_path(self) -> Path:
+        """:return: config path tied to the user"""
+        return Path(self.user_config_dir)
+
+    @property
+    def site_config_path(self) -> Path:
+        """:return: config path shared by the users"""
+        return Path(self.site_config_dir)
+
+    @property
+    def user_cache_path(self) -> Path:
+        """:return: cache path tied to the user"""
+        return Path(self.user_cache_dir)
+
+    @property
+    def user_state_path(self) -> Path:
+        """:return: state path tied to the user"""
+        return Path(self.user_state_dir)
+
+    @property
+    def user_log_path(self) -> Path:
+        """:return: log path tied to the user"""
+        return Path(self.user_log_dir)
+
+    @property
+    def user_documents_path(self) -> Path:
+        """:return: documents path tied to the user"""
+        return Path(self.user_documents_dir)
+
+    @property
+    def user_runtime_path(self) -> Path:
+        """:return: runtime path tied to the user"""
+        return Path(self.user_runtime_dir)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/macos.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/macos.py
new file mode 100644
index 0000000..a01337c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/macos.py
@@ -0,0 +1,64 @@
+from __future__ import annotations
+
+import os
+
+from .api import PlatformDirsABC
+
+
+class MacOS(PlatformDirsABC):
+    """
+    Platform directories for the macOS operating system. Follows the guidance from `Apple documentation
+    <https://developer.apple.com/library/archive/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/MacOSXDirectories/MacOSXDirectories.html>`_.
+    Makes use of the `appname <platformdirs.api.PlatformDirsABC.appname>` and
+    `version <platformdirs.api.PlatformDirsABC.version>`.
+    """
+
+    @property
+    def user_data_dir(self) -> str:
+        """:return: data directory tied to the user, e.g. ``~/Library/Application Support/$appname/$version``"""
+        return self._append_app_name_and_version(os.path.expanduser("~/Library/Application Support/"))
+
+    @property
+    def site_data_dir(self) -> str:
+        """:return: data directory shared by users, e.g. ``/Library/Application Support/$appname/$version``"""
+        return self._append_app_name_and_version("/Library/Application Support")
+
+    @property
+    def user_config_dir(self) -> str:
+        """:return: config directory tied to the user, e.g. ``~/Library/Preferences/$appname/$version``"""
+        return self._append_app_name_and_version(os.path.expanduser("~/Library/Preferences/"))
+
+    @property
+    def site_config_dir(self) -> str:
+        """:return: config directory shared by the users, e.g. ``/Library/Preferences/$appname``"""
+        return self._append_app_name_and_version("/Library/Preferences")
+
+    @property
+    def user_cache_dir(self) -> str:
+        """:return: cache directory tied to the user, e.g. ``~/Library/Caches/$appname/$version``"""
+        return self._append_app_name_and_version(os.path.expanduser("~/Library/Caches"))
+
+    @property
+    def user_state_dir(self) -> str:
+        """:return: state directory tied to the user, same as `user_data_dir`"""
+        return self.user_data_dir
+
+    @property
+    def user_log_dir(self) -> str:
+        """:return: log directory tied to the user, e.g. ``~/Library/Logs/$appname/$version``"""
+        return self._append_app_name_and_version(os.path.expanduser("~/Library/Logs"))
+
+    @property
+    def user_documents_dir(self) -> str:
+        """:return: documents directory tied to the user, e.g. ``~/Documents``"""
+        return os.path.expanduser("~/Documents")
+
+    @property
+    def user_runtime_dir(self) -> str:
+        """:return: runtime directory tied to the user, e.g. ``~/Library/Caches/TemporaryItems/$appname/$version``"""
+        return self._append_app_name_and_version(os.path.expanduser("~/Library/Caches/TemporaryItems"))
+
+
+__all__ = [
+    "MacOS",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/unix.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/unix.py
new file mode 100644
index 0000000..2fbd4d4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/unix.py
@@ -0,0 +1,181 @@
+from __future__ import annotations
+
+import os
+import sys
+from configparser import ConfigParser
+from pathlib import Path
+
+from .api import PlatformDirsABC
+
+if sys.platform.startswith("linux"):  # pragma: no branch # no op check, only to please the type checker
+    from os import getuid
+else:
+
+    def getuid() -> int:
+        raise RuntimeError("should only be used on Linux")
+
+
+class Unix(PlatformDirsABC):
+    """
+    On Unix/Linux, we follow the
+    `XDG Basedir Spec <https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html>`_. The spec allows
+    overriding directories with environment variables. The examples show are the default values, alongside the name of
+    the environment variable that overrides them. Makes use of the
+    `appname <platformdirs.api.PlatformDirsABC.appname>`,
+    `version <platformdirs.api.PlatformDirsABC.version>`,
+    `multipath <platformdirs.api.PlatformDirsABC.multipath>`,
+    `opinion <platformdirs.api.PlatformDirsABC.opinion>`.
+    """
+
+    @property
+    def user_data_dir(self) -> str:
+        """
+        :return: data directory tied to the user, e.g. ``~/.local/share/$appname/$version`` or
+         ``$XDG_DATA_HOME/$appname/$version``
+        """
+        path = os.environ.get("XDG_DATA_HOME", "")
+        if not path.strip():
+            path = os.path.expanduser("~/.local/share")
+        return self._append_app_name_and_version(path)
+
+    @property
+    def site_data_dir(self) -> str:
+        """
+        :return: data directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>` is
+         enabled and ``XDG_DATA_DIR`` is set and a multi path the response is also a multi path separated by the OS
+         path separator), e.g. ``/usr/local/share/$appname/$version`` or ``/usr/share/$appname/$version``
+        """
+        # XDG default for $XDG_DATA_DIRS; only first, if multipath is False
+        path = os.environ.get("XDG_DATA_DIRS", "")
+        if not path.strip():
+            path = f"/usr/local/share{os.pathsep}/usr/share"
+        return self._with_multi_path(path)
+
+    def _with_multi_path(self, path: str) -> str:
+        path_list = path.split(os.pathsep)
+        if not self.multipath:
+            path_list = path_list[0:1]
+        path_list = [self._append_app_name_and_version(os.path.expanduser(p)) for p in path_list]
+        return os.pathsep.join(path_list)
+
+    @property
+    def user_config_dir(self) -> str:
+        """
+        :return: config directory tied to the user, e.g. ``~/.config/$appname/$version`` or
+         ``$XDG_CONFIG_HOME/$appname/$version``
+        """
+        path = os.environ.get("XDG_CONFIG_HOME", "")
+        if not path.strip():
+            path = os.path.expanduser("~/.config")
+        return self._append_app_name_and_version(path)
+
+    @property
+    def site_config_dir(self) -> str:
+        """
+        :return: config directories shared by users (if `multipath <platformdirs.api.PlatformDirsABC.multipath>`
+         is enabled and ``XDG_DATA_DIR`` is set and a multi path the response is also a multi path separated by the OS
+         path separator), e.g. ``/etc/xdg/$appname/$version``
+        """
+        # XDG default for $XDG_CONFIG_DIRS only first, if multipath is False
+        path = os.environ.get("XDG_CONFIG_DIRS", "")
+        if not path.strip():
+            path = "/etc/xdg"
+        return self._with_multi_path(path)
+
+    @property
+    def user_cache_dir(self) -> str:
+        """
+        :return: cache directory tied to the user, e.g. ``~/.cache/$appname/$version`` or
+         ``~/$XDG_CACHE_HOME/$appname/$version``
+        """
+        path = os.environ.get("XDG_CACHE_HOME", "")
+        if not path.strip():
+            path = os.path.expanduser("~/.cache")
+        return self._append_app_name_and_version(path)
+
+    @property
+    def user_state_dir(self) -> str:
+        """
+        :return: state directory tied to the user, e.g. ``~/.local/state/$appname/$version`` or
+         ``$XDG_STATE_HOME/$appname/$version``
+        """
+        path = os.environ.get("XDG_STATE_HOME", "")
+        if not path.strip():
+            path = os.path.expanduser("~/.local/state")
+        return self._append_app_name_and_version(path)
+
+    @property
+    def user_log_dir(self) -> str:
+        """
+        :return: log directory tied to the user, same as `user_data_dir` if not opinionated else ``log`` in it
+        """
+        path = self.user_cache_dir
+        if self.opinion:
+            path = os.path.join(path, "log")
+        return path
+
+    @property
+    def user_documents_dir(self) -> str:
+        """
+        :return: documents directory tied to the user, e.g. ``~/Documents``
+        """
+        documents_dir = _get_user_dirs_folder("XDG_DOCUMENTS_DIR")
+        if documents_dir is None:
+            documents_dir = os.environ.get("XDG_DOCUMENTS_DIR", "").strip()
+            if not documents_dir:
+                documents_dir = os.path.expanduser("~/Documents")
+
+        return documents_dir
+
+    @property
+    def user_runtime_dir(self) -> str:
+        """
+        :return: runtime directory tied to the user, e.g. ``/run/user/$(id -u)/$appname/$version`` or
+         ``$XDG_RUNTIME_DIR/$appname/$version``
+        """
+        path = os.environ.get("XDG_RUNTIME_DIR", "")
+        if not path.strip():
+            path = f"/run/user/{getuid()}"
+        return self._append_app_name_and_version(path)
+
+    @property
+    def site_data_path(self) -> Path:
+        """:return: data path shared by users. Only return first item, even if ``multipath`` is set to ``True``"""
+        return self._first_item_as_path_if_multipath(self.site_data_dir)
+
+    @property
+    def site_config_path(self) -> Path:
+        """:return: config path shared by the users. Only return first item, even if ``multipath`` is set to ``True``"""
+        return self._first_item_as_path_if_multipath(self.site_config_dir)
+
+    def _first_item_as_path_if_multipath(self, directory: str) -> Path:
+        if self.multipath:
+            # If multipath is True, the first path is returned.
+            directory = directory.split(os.pathsep)[0]
+        return Path(directory)
+
+
+def _get_user_dirs_folder(key: str) -> str | None:
+    """Return directory from user-dirs.dirs config file. See https://freedesktop.org/wiki/Software/xdg-user-dirs/"""
+    user_dirs_config_path = os.path.join(Unix().user_config_dir, "user-dirs.dirs")
+    if os.path.exists(user_dirs_config_path):
+        parser = ConfigParser()
+
+        with open(user_dirs_config_path) as stream:
+            # Add fake section header, so ConfigParser doesn't complain
+            parser.read_string(f"[top]\n{stream.read()}")
+
+        if key not in parser["top"]:
+            return None
+
+        path = parser["top"][key].strip('"')
+        # Handle relative home paths
+        path = path.replace("$HOME", os.path.expanduser("~"))
+        return path
+
+    return None
+
+
+__all__ = [
+    "Unix",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/version.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/version.py
new file mode 100644
index 0000000..4552c02
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/version.py
@@ -0,0 +1,4 @@
+"""Version information"""
+
+__version__ = "2.5.2"
+__version_info__ = (2, 5, 2)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/windows.py b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/windows.py
new file mode 100644
index 0000000..ef972bd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/platformdirs/windows.py
@@ -0,0 +1,182 @@
+from __future__ import annotations
+
+import ctypes
+import os
+from functools import lru_cache
+from typing import Callable
+
+from .api import PlatformDirsABC
+
+
+class Windows(PlatformDirsABC):
+    """`MSDN on where to store app data files
+    <http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120>`_.
+    Makes use of the
+    `appname <platformdirs.api.PlatformDirsABC.appname>`,
+    `appauthor <platformdirs.api.PlatformDirsABC.appauthor>`,
+    `version <platformdirs.api.PlatformDirsABC.version>`,
+    `roaming <platformdirs.api.PlatformDirsABC.roaming>`,
+    `opinion <platformdirs.api.PlatformDirsABC.opinion>`."""
+
+    @property
+    def user_data_dir(self) -> str:
+        """
+        :return: data directory tied to the user, e.g.
+         ``%USERPROFILE%\\AppData\\Local\\$appauthor\\$appname`` (not roaming) or
+         ``%USERPROFILE%\\AppData\\Roaming\\$appauthor\\$appname`` (roaming)
+        """
+        const = "CSIDL_APPDATA" if self.roaming else "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(get_win_folder(const))
+        return self._append_parts(path)
+
+    def _append_parts(self, path: str, *, opinion_value: str | None = None) -> str:
+        params = []
+        if self.appname:
+            if self.appauthor is not False:
+                author = self.appauthor or self.appname
+                params.append(author)
+            params.append(self.appname)
+            if opinion_value is not None and self.opinion:
+                params.append(opinion_value)
+            if self.version:
+                params.append(self.version)
+        return os.path.join(path, *params)
+
+    @property
+    def site_data_dir(self) -> str:
+        """:return: data directory shared by users, e.g. ``C:\\ProgramData\\$appauthor\\$appname``"""
+        path = os.path.normpath(get_win_folder("CSIDL_COMMON_APPDATA"))
+        return self._append_parts(path)
+
+    @property
+    def user_config_dir(self) -> str:
+        """:return: config directory tied to the user, same as `user_data_dir`"""
+        return self.user_data_dir
+
+    @property
+    def site_config_dir(self) -> str:
+        """:return: config directory shared by the users, same as `site_data_dir`"""
+        return self.site_data_dir
+
+    @property
+    def user_cache_dir(self) -> str:
+        """
+        :return: cache directory tied to the user (if opinionated with ``Cache`` folder within ``$appname``) e.g.
+         ``%USERPROFILE%\\AppData\\Local\\$appauthor\\$appname\\Cache\\$version``
+        """
+        path = os.path.normpath(get_win_folder("CSIDL_LOCAL_APPDATA"))
+        return self._append_parts(path, opinion_value="Cache")
+
+    @property
+    def user_state_dir(self) -> str:
+        """:return: state directory tied to the user, same as `user_data_dir`"""
+        return self.user_data_dir
+
+    @property
+    def user_log_dir(self) -> str:
+        """
+        :return: log directory tied to the user, same as `user_data_dir` if not opinionated else ``Logs`` in it
+        """
+        path = self.user_data_dir
+        if self.opinion:
+            path = os.path.join(path, "Logs")
+        return path
+
+    @property
+    def user_documents_dir(self) -> str:
+        """
+        :return: documents directory tied to the user e.g. ``%USERPROFILE%\\Documents``
+        """
+        return os.path.normpath(get_win_folder("CSIDL_PERSONAL"))
+
+    @property
+    def user_runtime_dir(self) -> str:
+        """
+        :return: runtime directory tied to the user, e.g.
+         ``%USERPROFILE%\\AppData\\Local\\Temp\\$appauthor\\$appname``
+        """
+        path = os.path.normpath(os.path.join(get_win_folder("CSIDL_LOCAL_APPDATA"), "Temp"))
+        return self._append_parts(path)
+
+
+def get_win_folder_from_env_vars(csidl_name: str) -> str:
+    """Get folder from environment variables."""
+    if csidl_name == "CSIDL_PERSONAL":  # does not have an environment name
+        return os.path.join(os.path.normpath(os.environ["USERPROFILE"]), "Documents")
+
+    env_var_name = {
+        "CSIDL_APPDATA": "APPDATA",
+        "CSIDL_COMMON_APPDATA": "ALLUSERSPROFILE",
+        "CSIDL_LOCAL_APPDATA": "LOCALAPPDATA",
+    }.get(csidl_name)
+    if env_var_name is None:
+        raise ValueError(f"Unknown CSIDL name: {csidl_name}")
+    result = os.environ.get(env_var_name)
+    if result is None:
+        raise ValueError(f"Unset environment variable: {env_var_name}")
+    return result
+
+
+def get_win_folder_from_registry(csidl_name: str) -> str:
+    """Get folder from the registry.
+
+    This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+        "CSIDL_PERSONAL": "Personal",
+    }.get(csidl_name)
+    if shell_folder_name is None:
+        raise ValueError(f"Unknown CSIDL name: {csidl_name}")
+
+    import winreg
+
+    key = winreg.OpenKey(winreg.HKEY_CURRENT_USER, r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders")
+    directory, _ = winreg.QueryValueEx(key, shell_folder_name)
+    return str(directory)
+
+
+def get_win_folder_via_ctypes(csidl_name: str) -> str:
+    """Get folder with ctypes."""
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+        "CSIDL_PERSONAL": 5,
+    }.get(csidl_name)
+    if csidl_const is None:
+        raise ValueError(f"Unknown CSIDL name: {csidl_name}")
+
+    buf = ctypes.create_unicode_buffer(1024)
+    windll = getattr(ctypes, "windll")  # noqa: B009 # using getattr to avoid false positive with mypy type checker
+    windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if it has highbit chars.
+    if any(ord(c) > 255 for c in buf):
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+
+def _pick_get_win_folder() -> Callable[[str], str]:
+    if hasattr(ctypes, "windll"):
+        return get_win_folder_via_ctypes
+    try:
+        import winreg  # noqa: F401
+    except ImportError:
+        return get_win_folder_from_env_vars
+    else:
+        return get_win_folder_from_registry
+
+
+get_win_folder = lru_cache(maxsize=None)(_pick_get_win_folder())
+
+__all__ = [
+    "Windows",
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__init__.py
new file mode 100644
index 0000000..7185e53
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__init__.py
@@ -0,0 +1,82 @@
+"""
+    Pygments
+    ~~~~~~~~
+
+    Pygments is a syntax highlighting package written in Python.
+
+    It is a generic syntax highlighter for general use in all kinds of software
+    such as forum systems, wikis or other applications that need to prettify
+    source code. Highlights are:
+
+    * a wide range of common languages and markup formats is supported
+    * special attention is paid to details, increasing quality by a fair amount
+    * support for new languages and formats are added easily
+    * a number of output formats, presently HTML, LaTeX, RTF, SVG, all image
+      formats that PIL supports, and ANSI sequences
+    * it is usable as a command-line tool and as a library
+    * ... and it highlights even Brainfuck!
+
+    The `Pygments master branch`_ is installable with ``easy_install Pygments==dev``.
+
+    .. _Pygments master branch:
+       https://github.com/pygments/pygments/archive/master.zip#egg=Pygments-dev
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+from io import StringIO, BytesIO
+
+__version__ = '2.13.0'
+__docformat__ = 'restructuredtext'
+
+__all__ = ['lex', 'format', 'highlight']
+
+
+def lex(code, lexer):
+    """
+    Lex ``code`` with ``lexer`` and return an iterable of tokens.
+    """
+    try:
+        return lexer.get_tokens(code)
+    except TypeError:
+        # Heuristic to catch a common mistake.
+        from pip._vendor.pygments.lexer import RegexLexer
+        if isinstance(lexer, type) and issubclass(lexer, RegexLexer):
+            raise TypeError('lex() argument must be a lexer instance, '
+                            'not a class')
+        raise
+
+
+def format(tokens, formatter, outfile=None):  # pylint: disable=redefined-builtin
+    """
+    Format a tokenlist ``tokens`` with the formatter ``formatter``.
+
+    If ``outfile`` is given and a valid file object (an object
+    with a ``write`` method), the result will be written to it, otherwise
+    it is returned as a string.
+    """
+    try:
+        if not outfile:
+            realoutfile = getattr(formatter, 'encoding', None) and BytesIO() or StringIO()
+            formatter.format(tokens, realoutfile)
+            return realoutfile.getvalue()
+        else:
+            formatter.format(tokens, outfile)
+    except TypeError:
+        # Heuristic to catch a common mistake.
+        from pip._vendor.pygments.formatter import Formatter
+        if isinstance(formatter, type) and issubclass(formatter, Formatter):
+            raise TypeError('format() argument must be a formatter instance, '
+                            'not a class')
+        raise
+
+
+def highlight(code, lexer, formatter, outfile=None):
+    """
+    Lex ``code`` with ``lexer`` and format it with the formatter ``formatter``.
+
+    If ``outfile`` is given and a valid file object (an object
+    with a ``write`` method), the result will be written to it, otherwise
+    it is returned as a string.
+    """
+    return format(lex(code, lexer), formatter, outfile)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__main__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__main__.py
new file mode 100644
index 0000000..90cafd9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/__main__.py
@@ -0,0 +1,17 @@
+"""
+    pygments.__main__
+    ~~~~~~~~~~~~~~~~~
+
+    Main entry point for ``python -m pygments``.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import sys
+from pip._vendor.pygments.cmdline import main
+
+try:
+    sys.exit(main(sys.argv))
+except KeyboardInterrupt:
+    sys.exit(1)
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/cmdline.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/cmdline.py
new file mode 100644
index 0000000..de73b06
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/cmdline.py
@@ -0,0 +1,668 @@
+"""
+    pygments.cmdline
+    ~~~~~~~~~~~~~~~~
+
+    Command line interface.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import os
+import sys
+import shutil
+import argparse
+from textwrap import dedent
+
+from pip._vendor.pygments import __version__, highlight
+from pip._vendor.pygments.util import ClassNotFound, OptionError, docstring_headline, \
+    guess_decode, guess_decode_from_terminal, terminal_encoding, \
+    UnclosingTextIOWrapper
+from pip._vendor.pygments.lexers import get_all_lexers, get_lexer_by_name, guess_lexer, \
+    load_lexer_from_file, get_lexer_for_filename, find_lexer_class_for_filename
+from pip._vendor.pygments.lexers.special import TextLexer
+from pip._vendor.pygments.formatters.latex import LatexEmbeddedLexer, LatexFormatter
+from pip._vendor.pygments.formatters import get_all_formatters, get_formatter_by_name, \
+    load_formatter_from_file, get_formatter_for_filename, find_formatter_class
+from pip._vendor.pygments.formatters.terminal import TerminalFormatter
+from pip._vendor.pygments.formatters.terminal256 import Terminal256Formatter, TerminalTrueColorFormatter
+from pip._vendor.pygments.filters import get_all_filters, find_filter_class
+from pip._vendor.pygments.styles import get_all_styles, get_style_by_name
+
+
+def _parse_options(o_strs):
+    opts = {}
+    if not o_strs:
+        return opts
+    for o_str in o_strs:
+        if not o_str.strip():
+            continue
+        o_args = o_str.split(',')
+        for o_arg in o_args:
+            o_arg = o_arg.strip()
+            try:
+                o_key, o_val = o_arg.split('=', 1)
+                o_key = o_key.strip()
+                o_val = o_val.strip()
+            except ValueError:
+                opts[o_arg] = True
+            else:
+                opts[o_key] = o_val
+    return opts
+
+
+def _parse_filters(f_strs):
+    filters = []
+    if not f_strs:
+        return filters
+    for f_str in f_strs:
+        if ':' in f_str:
+            fname, fopts = f_str.split(':', 1)
+            filters.append((fname, _parse_options([fopts])))
+        else:
+            filters.append((f_str, {}))
+    return filters
+
+
+def _print_help(what, name):
+    try:
+        if what == 'lexer':
+            cls = get_lexer_by_name(name)
+            print("Help on the %s lexer:" % cls.name)
+            print(dedent(cls.__doc__))
+        elif what == 'formatter':
+            cls = find_formatter_class(name)
+            print("Help on the %s formatter:" % cls.name)
+            print(dedent(cls.__doc__))
+        elif what == 'filter':
+            cls = find_filter_class(name)
+            print("Help on the %s filter:" % name)
+            print(dedent(cls.__doc__))
+        return 0
+    except (AttributeError, ValueError):
+        print("%s not found!" % what, file=sys.stderr)
+        return 1
+
+
+def _print_list(what):
+    if what == 'lexer':
+        print()
+        print("Lexers:")
+        print("~~~~~~~")
+
+        info = []
+        for fullname, names, exts, _ in get_all_lexers():
+            tup = (', '.join(names)+':', fullname,
+                   exts and '(filenames ' + ', '.join(exts) + ')' or '')
+            info.append(tup)
+        info.sort()
+        for i in info:
+            print(('* %s\n    %s %s') % i)
+
+    elif what == 'formatter':
+        print()
+        print("Formatters:")
+        print("~~~~~~~~~~~")
+
+        info = []
+        for cls in get_all_formatters():
+            doc = docstring_headline(cls)
+            tup = (', '.join(cls.aliases) + ':', doc, cls.filenames and
+                   '(filenames ' + ', '.join(cls.filenames) + ')' or '')
+            info.append(tup)
+        info.sort()
+        for i in info:
+            print(('* %s\n    %s %s') % i)
+
+    elif what == 'filter':
+        print()
+        print("Filters:")
+        print("~~~~~~~~")
+
+        for name in get_all_filters():
+            cls = find_filter_class(name)
+            print("* " + name + ':')
+            print("    %s" % docstring_headline(cls))
+
+    elif what == 'style':
+        print()
+        print("Styles:")
+        print("~~~~~~~")
+
+        for name in get_all_styles():
+            cls = get_style_by_name(name)
+            print("* " + name + ':')
+            print("    %s" % docstring_headline(cls))
+
+
+def _print_list_as_json(requested_items):
+    import json
+    result = {}
+    if 'lexer' in requested_items:
+        info = {}
+        for fullname, names, filenames, mimetypes in get_all_lexers():
+            info[fullname] = {
+                'aliases': names,
+                'filenames': filenames,
+                'mimetypes': mimetypes
+            }
+        result['lexers'] = info
+
+    if 'formatter' in requested_items:
+        info = {}
+        for cls in get_all_formatters():
+            doc = docstring_headline(cls)
+            info[cls.name] = {
+                'aliases': cls.aliases,
+                'filenames': cls.filenames,
+                'doc': doc
+            }
+        result['formatters'] = info
+
+    if 'filter' in requested_items:
+        info = {}
+        for name in get_all_filters():
+            cls = find_filter_class(name)
+            info[name] = {
+                'doc': docstring_headline(cls)
+            }
+        result['filters'] = info
+
+    if 'style' in requested_items:
+        info = {}
+        for name in get_all_styles():
+            cls = get_style_by_name(name)
+            info[name] = {
+                'doc': docstring_headline(cls)
+            }
+        result['styles'] = info
+
+    json.dump(result, sys.stdout)
+
+def main_inner(parser, argns):
+    if argns.help:
+        parser.print_help()
+        return 0
+
+    if argns.V:
+        print('Pygments version %s, (c) 2006-2022 by Georg Brandl, Matthäus '
+              'Chajdas and contributors.' % __version__)
+        return 0
+
+    def is_only_option(opt):
+        return not any(v for (k, v) in vars(argns).items() if k != opt)
+
+    # handle ``pygmentize -L``
+    if argns.L is not None:
+        arg_set = set()
+        for k, v in vars(argns).items():
+            if v:
+                arg_set.add(k)
+
+        arg_set.discard('L')
+        arg_set.discard('json')
+
+        if arg_set:
+            parser.print_help(sys.stderr)
+            return 2
+
+        # print version
+        if not argns.json:
+            main(['', '-V'])
+        allowed_types = {'lexer', 'formatter', 'filter', 'style'}
+        largs = [arg.rstrip('s') for arg in argns.L]
+        if any(arg not in allowed_types for arg in largs):
+            parser.print_help(sys.stderr)
+            return 0
+        if not largs:
+            largs = allowed_types
+        if not argns.json:
+            for arg in largs:
+                _print_list(arg)
+        else:
+            _print_list_as_json(largs)
+        return 0
+
+    # handle ``pygmentize -H``
+    if argns.H:
+        if not is_only_option('H'):
+            parser.print_help(sys.stderr)
+            return 2
+        what, name = argns.H
+        if what not in ('lexer', 'formatter', 'filter'):
+            parser.print_help(sys.stderr)
+            return 2
+        return _print_help(what, name)
+
+    # parse -O options
+    parsed_opts = _parse_options(argns.O or [])
+
+    # parse -P options
+    for p_opt in argns.P or []:
+        try:
+            name, value = p_opt.split('=', 1)
+        except ValueError:
+            parsed_opts[p_opt] = True
+        else:
+            parsed_opts[name] = value
+
+    # encodings
+    inencoding = parsed_opts.get('inencoding', parsed_opts.get('encoding'))
+    outencoding = parsed_opts.get('outencoding', parsed_opts.get('encoding'))
+
+    # handle ``pygmentize -N``
+    if argns.N:
+        lexer = find_lexer_class_for_filename(argns.N)
+        if lexer is None:
+            lexer = TextLexer
+
+        print(lexer.aliases[0])
+        return 0
+
+    # handle ``pygmentize -C``
+    if argns.C:
+        inp = sys.stdin.buffer.read()
+        try:
+            lexer = guess_lexer(inp, inencoding=inencoding)
+        except ClassNotFound:
+            lexer = TextLexer
+
+        print(lexer.aliases[0])
+        return 0
+
+    # handle ``pygmentize -S``
+    S_opt = argns.S
+    a_opt = argns.a
+    if S_opt is not None:
+        f_opt = argns.f
+        if not f_opt:
+            parser.print_help(sys.stderr)
+            return 2
+        if argns.l or argns.INPUTFILE:
+            parser.print_help(sys.stderr)
+            return 2
+
+        try:
+            parsed_opts['style'] = S_opt
+            fmter = get_formatter_by_name(f_opt, **parsed_opts)
+        except ClassNotFound as err:
+            print(err, file=sys.stderr)
+            return 1
+
+        print(fmter.get_style_defs(a_opt or ''))
+        return 0
+
+    # if no -S is given, -a is not allowed
+    if argns.a is not None:
+        parser.print_help(sys.stderr)
+        return 2
+
+    # parse -F options
+    F_opts = _parse_filters(argns.F or [])
+
+    # -x: allow custom (eXternal) lexers and formatters
+    allow_custom_lexer_formatter = bool(argns.x)
+
+    # select lexer
+    lexer = None
+
+    # given by name?
+    lexername = argns.l
+    if lexername:
+        # custom lexer, located relative to user's cwd
+        if allow_custom_lexer_formatter and '.py' in lexername:
+            try:
+                filename = None
+                name = None
+                if ':' in lexername:
+                    filename, name = lexername.rsplit(':', 1)
+
+                    if '.py' in name:
+                        # This can happen on Windows: If the lexername is
+                        # C:\lexer.py -- return to normal load path in that case
+                        name = None
+
+                if filename and name:
+                    lexer = load_lexer_from_file(filename, name,
+                                                 **parsed_opts)
+                else:
+                    lexer = load_lexer_from_file(lexername, **parsed_opts)
+            except ClassNotFound as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+        else:
+            try:
+                lexer = get_lexer_by_name(lexername, **parsed_opts)
+            except (OptionError, ClassNotFound) as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+
+    # read input code
+    code = None
+
+    if argns.INPUTFILE:
+        if argns.s:
+            print('Error: -s option not usable when input file specified',
+                  file=sys.stderr)
+            return 2
+
+        infn = argns.INPUTFILE
+        try:
+            with open(infn, 'rb') as infp:
+                code = infp.read()
+        except Exception as err:
+            print('Error: cannot read infile:', err, file=sys.stderr)
+            return 1
+        if not inencoding:
+            code, inencoding = guess_decode(code)
+
+        # do we have to guess the lexer?
+        if not lexer:
+            try:
+                lexer = get_lexer_for_filename(infn, code, **parsed_opts)
+            except ClassNotFound as err:
+                if argns.g:
+                    try:
+                        lexer = guess_lexer(code, **parsed_opts)
+                    except ClassNotFound:
+                        lexer = TextLexer(**parsed_opts)
+                else:
+                    print('Error:', err, file=sys.stderr)
+                    return 1
+            except OptionError as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+
+    elif not argns.s:  # treat stdin as full file (-s support is later)
+        # read code from terminal, always in binary mode since we want to
+        # decode ourselves and be tolerant with it
+        code = sys.stdin.buffer.read()  # use .buffer to get a binary stream
+        if not inencoding:
+            code, inencoding = guess_decode_from_terminal(code, sys.stdin)
+            # else the lexer will do the decoding
+        if not lexer:
+            try:
+                lexer = guess_lexer(code, **parsed_opts)
+            except ClassNotFound:
+                lexer = TextLexer(**parsed_opts)
+
+    else:  # -s option needs a lexer with -l
+        if not lexer:
+            print('Error: when using -s a lexer has to be selected with -l',
+                  file=sys.stderr)
+            return 2
+
+    # process filters
+    for fname, fopts in F_opts:
+        try:
+            lexer.add_filter(fname, **fopts)
+        except ClassNotFound as err:
+            print('Error:', err, file=sys.stderr)
+            return 1
+
+    # select formatter
+    outfn = argns.o
+    fmter = argns.f
+    if fmter:
+        # custom formatter, located relative to user's cwd
+        if allow_custom_lexer_formatter and '.py' in fmter:
+            try:
+                filename = None
+                name = None
+                if ':' in fmter:
+                    # Same logic as above for custom lexer
+                    filename, name = fmter.rsplit(':', 1)
+
+                    if '.py' in name:
+                        name = None
+
+                if filename and name:
+                    fmter = load_formatter_from_file(filename, name,
+                                                     **parsed_opts)
+                else:
+                    fmter = load_formatter_from_file(fmter, **parsed_opts)
+            except ClassNotFound as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+        else:
+            try:
+                fmter = get_formatter_by_name(fmter, **parsed_opts)
+            except (OptionError, ClassNotFound) as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+
+    if outfn:
+        if not fmter:
+            try:
+                fmter = get_formatter_for_filename(outfn, **parsed_opts)
+            except (OptionError, ClassNotFound) as err:
+                print('Error:', err, file=sys.stderr)
+                return 1
+        try:
+            outfile = open(outfn, 'wb')
+        except Exception as err:
+            print('Error: cannot open outfile:', err, file=sys.stderr)
+            return 1
+    else:
+        if not fmter:
+            if os.environ.get('COLORTERM','') in ('truecolor', '24bit'):
+                fmter = TerminalTrueColorFormatter(**parsed_opts)
+            elif '256' in os.environ.get('TERM', ''):
+                fmter = Terminal256Formatter(**parsed_opts)
+            else:
+                fmter = TerminalFormatter(**parsed_opts)
+        outfile = sys.stdout.buffer
+
+    # determine output encoding if not explicitly selected
+    if not outencoding:
+        if outfn:
+            # output file? use lexer encoding for now (can still be None)
+            fmter.encoding = inencoding
+        else:
+            # else use terminal encoding
+            fmter.encoding = terminal_encoding(sys.stdout)
+
+    # provide coloring under Windows, if possible
+    if not outfn and sys.platform in ('win32', 'cygwin') and \
+       fmter.name in ('Terminal', 'Terminal256'):  # pragma: no cover
+        # unfortunately colorama doesn't support binary streams on Py3
+        outfile = UnclosingTextIOWrapper(outfile, encoding=fmter.encoding)
+        fmter.encoding = None
+        try:
+            import pip._vendor.colorama.initialise as colorama_initialise
+        except ImportError:
+            pass
+        else:
+            outfile = colorama_initialise.wrap_stream(
+                outfile, convert=None, strip=None, autoreset=False, wrap=True)
+
+    # When using the LaTeX formatter and the option `escapeinside` is
+    # specified, we need a special lexer which collects escaped text
+    # before running the chosen language lexer.
+    escapeinside = parsed_opts.get('escapeinside', '')
+    if len(escapeinside) == 2 and isinstance(fmter, LatexFormatter):
+        left = escapeinside[0]
+        right = escapeinside[1]
+        lexer = LatexEmbeddedLexer(left, right, lexer)
+
+    # ... and do it!
+    if not argns.s:
+        # process whole input as per normal...
+        try:
+            highlight(code, lexer, fmter, outfile)
+        finally:
+            if outfn:
+                outfile.close()
+        return 0
+    else:
+        # line by line processing of stdin (eg: for 'tail -f')...
+        try:
+            while 1:
+                line = sys.stdin.buffer.readline()
+                if not line:
+                    break
+                if not inencoding:
+                    line = guess_decode_from_terminal(line, sys.stdin)[0]
+                highlight(line, lexer, fmter, outfile)
+                if hasattr(outfile, 'flush'):
+                    outfile.flush()
+            return 0
+        except KeyboardInterrupt:  # pragma: no cover
+            return 0
+        finally:
+            if outfn:
+                outfile.close()
+
+
+class HelpFormatter(argparse.HelpFormatter):
+    def __init__(self, prog, indent_increment=2, max_help_position=16, width=None):
+        if width is None:
+            try:
+                width = shutil.get_terminal_size().columns - 2
+            except Exception:
+                pass
+        argparse.HelpFormatter.__init__(self, prog, indent_increment,
+                                        max_help_position, width)
+
+
+def main(args=sys.argv):
+    """
+    Main command line entry point.
+    """
+    desc = "Highlight an input file and write the result to an output file."
+    parser = argparse.ArgumentParser(description=desc, add_help=False,
+                                     formatter_class=HelpFormatter)
+
+    operation = parser.add_argument_group('Main operation')
+    lexersel = operation.add_mutually_exclusive_group()
+    lexersel.add_argument(
+        '-l', metavar='LEXER',
+        help='Specify the lexer to use.  (Query names with -L.)  If not '
+        'given and -g is not present, the lexer is guessed from the filename.')
+    lexersel.add_argument(
+        '-g', action='store_true',
+        help='Guess the lexer from the file contents, or pass through '
+        'as plain text if nothing can be guessed.')
+    operation.add_argument(
+        '-F', metavar='FILTER[:options]', action='append',
+        help='Add a filter to the token stream.  (Query names with -L.) '
+        'Filter options are given after a colon if necessary.')
+    operation.add_argument(
+        '-f', metavar='FORMATTER',
+        help='Specify the formatter to use.  (Query names with -L.) '
+        'If not given, the formatter is guessed from the output filename, '
+        'and defaults to the terminal formatter if the output is to the '
+        'terminal or an unknown file extension.')
+    operation.add_argument(
+        '-O', metavar='OPTION=value[,OPTION=value,...]', action='append',
+        help='Give options to the lexer and formatter as a comma-separated '
+        'list of key-value pairs. '
+        'Example: `-O bg=light,python=cool`.')
+    operation.add_argument(
+        '-P', metavar='OPTION=value', action='append',
+        help='Give a single option to the lexer and formatter - with this '
+        'you can pass options whose value contains commas and equal signs. '
+        'Example: `-P "heading=Pygments, the Python highlighter"`.')
+    operation.add_argument(
+        '-o', metavar='OUTPUTFILE',
+        help='Where to write the output.  Defaults to standard output.')
+
+    operation.add_argument(
+        'INPUTFILE', nargs='?',
+        help='Where to read the input.  Defaults to standard input.')
+
+    flags = parser.add_argument_group('Operation flags')
+    flags.add_argument(
+        '-v', action='store_true',
+        help='Print a detailed traceback on unhandled exceptions, which '
+        'is useful for debugging and bug reports.')
+    flags.add_argument(
+        '-s', action='store_true',
+        help='Process lines one at a time until EOF, rather than waiting to '
+        'process the entire file.  This only works for stdin, only for lexers '
+        'with no line-spanning constructs, and is intended for streaming '
+        'input such as you get from `tail -f`. '
+        'Example usage: `tail -f sql.log | pygmentize -s -l sql`.')
+    flags.add_argument(
+        '-x', action='store_true',
+        help='Allow custom lexers and formatters to be loaded from a .py file '
+        'relative to the current working directory. For example, '
+        '`-l ./customlexer.py -x`. By default, this option expects a file '
+        'with a class named CustomLexer or CustomFormatter; you can also '
+        'specify your own class name with a colon (`-l ./lexer.py:MyLexer`). '
+        'Users should be very careful not to use this option with untrusted '
+        'files, because it will import and run them.')
+    flags.add_argument('--json', help='Output as JSON. This can '
+        'be only used in conjunction with -L.',
+        default=False,
+        action='store_true')
+
+    special_modes_group = parser.add_argument_group(
+        'Special modes - do not do any highlighting')
+    special_modes = special_modes_group.add_mutually_exclusive_group()
+    special_modes.add_argument(
+        '-S', metavar='STYLE -f formatter',
+        help='Print style definitions for STYLE for a formatter '
+        'given with -f. The argument given by -a is formatter '
+        'dependent.')
+    special_modes.add_argument(
+        '-L', nargs='*', metavar='WHAT',
+        help='List lexers, formatters, styles or filters -- '
+        'give additional arguments for the thing(s) you want to list '
+        '(e.g. "styles"), or omit them to list everything.')
+    special_modes.add_argument(
+        '-N', metavar='FILENAME',
+        help='Guess and print out a lexer name based solely on the given '
+        'filename. Does not take input or highlight anything. If no specific '
+        'lexer can be determined, "text" is printed.')
+    special_modes.add_argument(
+        '-C', action='store_true',
+        help='Like -N, but print out a lexer name based solely on '
+        'a given content from standard input.')
+    special_modes.add_argument(
+        '-H', action='store', nargs=2, metavar=('NAME', 'TYPE'),
+        help='Print detailed help for the object <name> of type <type>, '
+        'where <type> is one of "lexer", "formatter" or "filter".')
+    special_modes.add_argument(
+        '-V', action='store_true',
+        help='Print the package version.')
+    special_modes.add_argument(
+        '-h', '--help', action='store_true',
+        help='Print this help.')
+    special_modes_group.add_argument(
+        '-a', metavar='ARG',
+        help='Formatter-specific additional argument for the -S (print '
+        'style sheet) mode.')
+
+    argns = parser.parse_args(args[1:])
+
+    try:
+        return main_inner(parser, argns)
+    except BrokenPipeError:
+        # someone closed our stdout, e.g. by quitting a pager.
+        return 0
+    except Exception:
+        if argns.v:
+            print(file=sys.stderr)
+            print('*' * 65, file=sys.stderr)
+            print('An unhandled exception occurred while highlighting.',
+                  file=sys.stderr)
+            print('Please report the whole traceback to the issue tracker at',
+                  file=sys.stderr)
+            print('<https://github.com/pygments/pygments/issues>.',
+                  file=sys.stderr)
+            print('*' * 65, file=sys.stderr)
+            print(file=sys.stderr)
+            raise
+        import traceback
+        info = traceback.format_exception(*sys.exc_info())
+        msg = info[-1].strip()
+        if len(info) >= 3:
+            # extract relevant file and position info
+            msg += '\n   (f%s)' % info[-2].split('\n')[0].strip()[1:]
+        print(file=sys.stderr)
+        print('*** Error while highlighting:', file=sys.stderr)
+        print(msg, file=sys.stderr)
+        print('*** If this is a bug you want to report, please rerun with -v.',
+              file=sys.stderr)
+        return 1
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/console.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/console.py
new file mode 100644
index 0000000..2ada68e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/console.py
@@ -0,0 +1,70 @@
+"""
+    pygments.console
+    ~~~~~~~~~~~~~~~~
+
+    Format colored console output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+esc = "\x1b["
+
+codes = {}
+codes[""] = ""
+codes["reset"] = esc + "39;49;00m"
+
+codes["bold"] = esc + "01m"
+codes["faint"] = esc + "02m"
+codes["standout"] = esc + "03m"
+codes["underline"] = esc + "04m"
+codes["blink"] = esc + "05m"
+codes["overline"] = esc + "06m"
+
+dark_colors = ["black", "red", "green", "yellow", "blue",
+               "magenta", "cyan", "gray"]
+light_colors = ["brightblack", "brightred", "brightgreen", "brightyellow", "brightblue",
+                "brightmagenta", "brightcyan", "white"]
+
+x = 30
+for d, l in zip(dark_colors, light_colors):
+    codes[d] = esc + "%im" % x
+    codes[l] = esc + "%im" % (60 + x)
+    x += 1
+
+del d, l, x
+
+codes["white"] = codes["bold"]
+
+
+def reset_color():
+    return codes["reset"]
+
+
+def colorize(color_key, text):
+    return codes[color_key] + text + codes["reset"]
+
+
+def ansiformat(attr, text):
+    """
+    Format ``text`` with a color and/or some attributes::
+
+        color       normal color
+        *color*     bold color
+        _color_     underlined color
+        +color+     blinking color
+    """
+    result = []
+    if attr[:1] == attr[-1:] == '+':
+        result.append(codes['blink'])
+        attr = attr[1:-1]
+    if attr[:1] == attr[-1:] == '*':
+        result.append(codes['bold'])
+        attr = attr[1:-1]
+    if attr[:1] == attr[-1:] == '_':
+        result.append(codes['underline'])
+        attr = attr[1:-1]
+    result.append(codes[attr])
+    result.append(text)
+    result.append(codes['reset'])
+    return ''.join(result)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filter.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filter.py
new file mode 100644
index 0000000..e5c9664
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filter.py
@@ -0,0 +1,71 @@
+"""
+    pygments.filter
+    ~~~~~~~~~~~~~~~
+
+    Module that implements the default filter.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+
+def apply_filters(stream, filters, lexer=None):
+    """
+    Use this method to apply an iterable of filters to
+    a stream. If lexer is given it's forwarded to the
+    filter, otherwise the filter receives `None`.
+    """
+    def _apply(filter_, stream):
+        yield from filter_.filter(lexer, stream)
+    for filter_ in filters:
+        stream = _apply(filter_, stream)
+    return stream
+
+
+def simplefilter(f):
+    """
+    Decorator that converts a function into a filter::
+
+        @simplefilter
+        def lowercase(self, lexer, stream, options):
+            for ttype, value in stream:
+                yield ttype, value.lower()
+    """
+    return type(f.__name__, (FunctionFilter,), {
+        '__module__': getattr(f, '__module__'),
+        '__doc__': f.__doc__,
+        'function': f,
+    })
+
+
+class Filter:
+    """
+    Default filter. Subclass this class or use the `simplefilter`
+    decorator to create own filters.
+    """
+
+    def __init__(self, **options):
+        self.options = options
+
+    def filter(self, lexer, stream):
+        raise NotImplementedError()
+
+
+class FunctionFilter(Filter):
+    """
+    Abstract class used by `simplefilter` to create simple
+    function filters on the fly. The `simplefilter` decorator
+    automatically creates subclasses of this class for
+    functions passed to it.
+    """
+    function = None
+
+    def __init__(self, **options):
+        if not hasattr(self, 'function'):
+            raise TypeError('%r used without bound function' %
+                            self.__class__.__name__)
+        Filter.__init__(self, **options)
+
+    def filter(self, lexer, stream):
+        # pylint: disable=not-callable
+        yield from self.function(lexer, stream, self.options)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__init__.py
new file mode 100644
index 0000000..c302a6c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__init__.py
@@ -0,0 +1,940 @@
+"""
+    pygments.filters
+    ~~~~~~~~~~~~~~~~
+
+    Module containing filter lookup functions and default
+    filters.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+from pip._vendor.pygments.token import String, Comment, Keyword, Name, Error, Whitespace, \
+    string_to_tokentype
+from pip._vendor.pygments.filter import Filter
+from pip._vendor.pygments.util import get_list_opt, get_int_opt, get_bool_opt, \
+    get_choice_opt, ClassNotFound, OptionError
+from pip._vendor.pygments.plugin import find_plugin_filters
+
+
+def find_filter_class(filtername):
+    """Lookup a filter by name. Return None if not found."""
+    if filtername in FILTERS:
+        return FILTERS[filtername]
+    for name, cls in find_plugin_filters():
+        if name == filtername:
+            return cls
+    return None
+
+
+def get_filter_by_name(filtername, **options):
+    """Return an instantiated filter.
+
+    Options are passed to the filter initializer if wanted.
+    Raise a ClassNotFound if not found.
+    """
+    cls = find_filter_class(filtername)
+    if cls:
+        return cls(**options)
+    else:
+        raise ClassNotFound('filter %r not found' % filtername)
+
+
+def get_all_filters():
+    """Return a generator of all filter names."""
+    yield from FILTERS
+    for name, _ in find_plugin_filters():
+        yield name
+
+
+def _replace_special(ttype, value, regex, specialttype,
+                     replacefunc=lambda x: x):
+    last = 0
+    for match in regex.finditer(value):
+        start, end = match.start(), match.end()
+        if start != last:
+            yield ttype, value[last:start]
+        yield specialttype, replacefunc(value[start:end])
+        last = end
+    if last != len(value):
+        yield ttype, value[last:]
+
+
+class CodeTagFilter(Filter):
+    """Highlight special code tags in comments and docstrings.
+
+    Options accepted:
+
+    `codetags` : list of strings
+       A list of strings that are flagged as code tags.  The default is to
+       highlight ``XXX``, ``TODO``, ``FIXME``, ``BUG`` and ``NOTE``.
+
+    .. versionchanged:: 2.13
+       Now recognizes ``FIXME`` by default.
+    """
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        tags = get_list_opt(options, 'codetags',
+                            ['XXX', 'TODO', 'FIXME', 'BUG', 'NOTE'])
+        self.tag_re = re.compile(r'\b(%s)\b' % '|'.join([
+            re.escape(tag) for tag in tags if tag
+        ]))
+
+    def filter(self, lexer, stream):
+        regex = self.tag_re
+        for ttype, value in stream:
+            if ttype in String.Doc or \
+               ttype in Comment and \
+               ttype not in Comment.Preproc:
+                yield from _replace_special(ttype, value, regex, Comment.Special)
+            else:
+                yield ttype, value
+
+
+class SymbolFilter(Filter):
+    """Convert mathematical symbols such as \\<longrightarrow> in Isabelle
+    or \\longrightarrow in LaTeX into Unicode characters.
+
+    This is mostly useful for HTML or console output when you want to
+    approximate the source rendering you'd see in an IDE.
+
+    Options accepted:
+
+    `lang` : string
+       The symbol language. Must be one of ``'isabelle'`` or
+       ``'latex'``.  The default is ``'isabelle'``.
+    """
+
+    latex_symbols = {
+        '\\alpha'                : '\U000003b1',
+        '\\beta'                 : '\U000003b2',
+        '\\gamma'                : '\U000003b3',
+        '\\delta'                : '\U000003b4',
+        '\\varepsilon'           : '\U000003b5',
+        '\\zeta'                 : '\U000003b6',
+        '\\eta'                  : '\U000003b7',
+        '\\vartheta'             : '\U000003b8',
+        '\\iota'                 : '\U000003b9',
+        '\\kappa'                : '\U000003ba',
+        '\\lambda'               : '\U000003bb',
+        '\\mu'                   : '\U000003bc',
+        '\\nu'                   : '\U000003bd',
+        '\\xi'                   : '\U000003be',
+        '\\pi'                   : '\U000003c0',
+        '\\varrho'               : '\U000003c1',
+        '\\sigma'                : '\U000003c3',
+        '\\tau'                  : '\U000003c4',
+        '\\upsilon'              : '\U000003c5',
+        '\\varphi'               : '\U000003c6',
+        '\\chi'                  : '\U000003c7',
+        '\\psi'                  : '\U000003c8',
+        '\\omega'                : '\U000003c9',
+        '\\Gamma'                : '\U00000393',
+        '\\Delta'                : '\U00000394',
+        '\\Theta'                : '\U00000398',
+        '\\Lambda'               : '\U0000039b',
+        '\\Xi'                   : '\U0000039e',
+        '\\Pi'                   : '\U000003a0',
+        '\\Sigma'                : '\U000003a3',
+        '\\Upsilon'              : '\U000003a5',
+        '\\Phi'                  : '\U000003a6',
+        '\\Psi'                  : '\U000003a8',
+        '\\Omega'                : '\U000003a9',
+        '\\leftarrow'            : '\U00002190',
+        '\\longleftarrow'        : '\U000027f5',
+        '\\rightarrow'           : '\U00002192',
+        '\\longrightarrow'       : '\U000027f6',
+        '\\Leftarrow'            : '\U000021d0',
+        '\\Longleftarrow'        : '\U000027f8',
+        '\\Rightarrow'           : '\U000021d2',
+        '\\Longrightarrow'       : '\U000027f9',
+        '\\leftrightarrow'       : '\U00002194',
+        '\\longleftrightarrow'   : '\U000027f7',
+        '\\Leftrightarrow'       : '\U000021d4',
+        '\\Longleftrightarrow'   : '\U000027fa',
+        '\\mapsto'               : '\U000021a6',
+        '\\longmapsto'           : '\U000027fc',
+        '\\relbar'               : '\U00002500',
+        '\\Relbar'               : '\U00002550',
+        '\\hookleftarrow'        : '\U000021a9',
+        '\\hookrightarrow'       : '\U000021aa',
+        '\\leftharpoondown'      : '\U000021bd',
+        '\\rightharpoondown'     : '\U000021c1',
+        '\\leftharpoonup'        : '\U000021bc',
+        '\\rightharpoonup'       : '\U000021c0',
+        '\\rightleftharpoons'    : '\U000021cc',
+        '\\leadsto'              : '\U0000219d',
+        '\\downharpoonleft'      : '\U000021c3',
+        '\\downharpoonright'     : '\U000021c2',
+        '\\upharpoonleft'        : '\U000021bf',
+        '\\upharpoonright'       : '\U000021be',
+        '\\restriction'          : '\U000021be',
+        '\\uparrow'              : '\U00002191',
+        '\\Uparrow'              : '\U000021d1',
+        '\\downarrow'            : '\U00002193',
+        '\\Downarrow'            : '\U000021d3',
+        '\\updownarrow'          : '\U00002195',
+        '\\Updownarrow'          : '\U000021d5',
+        '\\langle'               : '\U000027e8',
+        '\\rangle'               : '\U000027e9',
+        '\\lceil'                : '\U00002308',
+        '\\rceil'                : '\U00002309',
+        '\\lfloor'               : '\U0000230a',
+        '\\rfloor'               : '\U0000230b',
+        '\\flqq'                 : '\U000000ab',
+        '\\frqq'                 : '\U000000bb',
+        '\\bot'                  : '\U000022a5',
+        '\\top'                  : '\U000022a4',
+        '\\wedge'                : '\U00002227',
+        '\\bigwedge'             : '\U000022c0',
+        '\\vee'                  : '\U00002228',
+        '\\bigvee'               : '\U000022c1',
+        '\\forall'               : '\U00002200',
+        '\\exists'               : '\U00002203',
+        '\\nexists'              : '\U00002204',
+        '\\neg'                  : '\U000000ac',
+        '\\Box'                  : '\U000025a1',
+        '\\Diamond'              : '\U000025c7',
+        '\\vdash'                : '\U000022a2',
+        '\\models'               : '\U000022a8',
+        '\\dashv'                : '\U000022a3',
+        '\\surd'                 : '\U0000221a',
+        '\\le'                   : '\U00002264',
+        '\\ge'                   : '\U00002265',
+        '\\ll'                   : '\U0000226a',
+        '\\gg'                   : '\U0000226b',
+        '\\lesssim'              : '\U00002272',
+        '\\gtrsim'               : '\U00002273',
+        '\\lessapprox'           : '\U00002a85',
+        '\\gtrapprox'            : '\U00002a86',
+        '\\in'                   : '\U00002208',
+        '\\notin'                : '\U00002209',
+        '\\subset'               : '\U00002282',
+        '\\supset'               : '\U00002283',
+        '\\subseteq'             : '\U00002286',
+        '\\supseteq'             : '\U00002287',
+        '\\sqsubset'             : '\U0000228f',
+        '\\sqsupset'             : '\U00002290',
+        '\\sqsubseteq'           : '\U00002291',
+        '\\sqsupseteq'           : '\U00002292',
+        '\\cap'                  : '\U00002229',
+        '\\bigcap'               : '\U000022c2',
+        '\\cup'                  : '\U0000222a',
+        '\\bigcup'               : '\U000022c3',
+        '\\sqcup'                : '\U00002294',
+        '\\bigsqcup'             : '\U00002a06',
+        '\\sqcap'                : '\U00002293',
+        '\\Bigsqcap'             : '\U00002a05',
+        '\\setminus'             : '\U00002216',
+        '\\propto'               : '\U0000221d',
+        '\\uplus'                : '\U0000228e',
+        '\\bigplus'              : '\U00002a04',
+        '\\sim'                  : '\U0000223c',
+        '\\doteq'                : '\U00002250',
+        '\\simeq'                : '\U00002243',
+        '\\approx'               : '\U00002248',
+        '\\asymp'                : '\U0000224d',
+        '\\cong'                 : '\U00002245',
+        '\\equiv'                : '\U00002261',
+        '\\Join'                 : '\U000022c8',
+        '\\bowtie'               : '\U00002a1d',
+        '\\prec'                 : '\U0000227a',
+        '\\succ'                 : '\U0000227b',
+        '\\preceq'               : '\U0000227c',
+        '\\succeq'               : '\U0000227d',
+        '\\parallel'             : '\U00002225',
+        '\\mid'                  : '\U000000a6',
+        '\\pm'                   : '\U000000b1',
+        '\\mp'                   : '\U00002213',
+        '\\times'                : '\U000000d7',
+        '\\div'                  : '\U000000f7',
+        '\\cdot'                 : '\U000022c5',
+        '\\star'                 : '\U000022c6',
+        '\\circ'                 : '\U00002218',
+        '\\dagger'               : '\U00002020',
+        '\\ddagger'              : '\U00002021',
+        '\\lhd'                  : '\U000022b2',
+        '\\rhd'                  : '\U000022b3',
+        '\\unlhd'                : '\U000022b4',
+        '\\unrhd'                : '\U000022b5',
+        '\\triangleleft'         : '\U000025c3',
+        '\\triangleright'        : '\U000025b9',
+        '\\triangle'             : '\U000025b3',
+        '\\triangleq'            : '\U0000225c',
+        '\\oplus'                : '\U00002295',
+        '\\bigoplus'             : '\U00002a01',
+        '\\otimes'               : '\U00002297',
+        '\\bigotimes'            : '\U00002a02',
+        '\\odot'                 : '\U00002299',
+        '\\bigodot'              : '\U00002a00',
+        '\\ominus'               : '\U00002296',
+        '\\oslash'               : '\U00002298',
+        '\\dots'                 : '\U00002026',
+        '\\cdots'                : '\U000022ef',
+        '\\sum'                  : '\U00002211',
+        '\\prod'                 : '\U0000220f',
+        '\\coprod'               : '\U00002210',
+        '\\infty'                : '\U0000221e',
+        '\\int'                  : '\U0000222b',
+        '\\oint'                 : '\U0000222e',
+        '\\clubsuit'             : '\U00002663',
+        '\\diamondsuit'          : '\U00002662',
+        '\\heartsuit'            : '\U00002661',
+        '\\spadesuit'            : '\U00002660',
+        '\\aleph'                : '\U00002135',
+        '\\emptyset'             : '\U00002205',
+        '\\nabla'                : '\U00002207',
+        '\\partial'              : '\U00002202',
+        '\\flat'                 : '\U0000266d',
+        '\\natural'              : '\U0000266e',
+        '\\sharp'                : '\U0000266f',
+        '\\angle'                : '\U00002220',
+        '\\copyright'            : '\U000000a9',
+        '\\textregistered'       : '\U000000ae',
+        '\\textonequarter'       : '\U000000bc',
+        '\\textonehalf'          : '\U000000bd',
+        '\\textthreequarters'    : '\U000000be',
+        '\\textordfeminine'      : '\U000000aa',
+        '\\textordmasculine'     : '\U000000ba',
+        '\\euro'                 : '\U000020ac',
+        '\\pounds'               : '\U000000a3',
+        '\\yen'                  : '\U000000a5',
+        '\\textcent'             : '\U000000a2',
+        '\\textcurrency'         : '\U000000a4',
+        '\\textdegree'           : '\U000000b0',
+    }
+
+    isabelle_symbols = {
+        '\\<zero>'                 : '\U0001d7ec',
+        '\\<one>'                  : '\U0001d7ed',
+        '\\<two>'                  : '\U0001d7ee',
+        '\\<three>'                : '\U0001d7ef',
+        '\\<four>'                 : '\U0001d7f0',
+        '\\<five>'                 : '\U0001d7f1',
+        '\\<six>'                  : '\U0001d7f2',
+        '\\<seven>'                : '\U0001d7f3',
+        '\\<eight>'                : '\U0001d7f4',
+        '\\<nine>'                 : '\U0001d7f5',
+        '\\<A>'                    : '\U0001d49c',
+        '\\<B>'                    : '\U0000212c',
+        '\\<C>'                    : '\U0001d49e',
+        '\\<D>'                    : '\U0001d49f',
+        '\\<E>'                    : '\U00002130',
+        '\\<F>'                    : '\U00002131',
+        '\\<G>'                    : '\U0001d4a2',
+        '\\<H>'                    : '\U0000210b',
+        '\\<I>'                    : '\U00002110',
+        '\\<J>'                    : '\U0001d4a5',
+        '\\<K>'                    : '\U0001d4a6',
+        '\\<L>'                    : '\U00002112',
+        '\\<M>'                    : '\U00002133',
+        '\\<N>'                    : '\U0001d4a9',
+        '\\<O>'                    : '\U0001d4aa',
+        '\\<P>'                    : '\U0001d4ab',
+        '\\<Q>'                    : '\U0001d4ac',
+        '\\<R>'                    : '\U0000211b',
+        '\\<S>'                    : '\U0001d4ae',
+        '\\<T>'                    : '\U0001d4af',
+        '\\<U>'                    : '\U0001d4b0',
+        '\\<V>'                    : '\U0001d4b1',
+        '\\<W>'                    : '\U0001d4b2',
+        '\\<X>'                    : '\U0001d4b3',
+        '\\<Y>'                    : '\U0001d4b4',
+        '\\<Z>'                    : '\U0001d4b5',
+        '\\<a>'                    : '\U0001d5ba',
+        '\\<b>'                    : '\U0001d5bb',
+        '\\<c>'                    : '\U0001d5bc',
+        '\\<d>'                    : '\U0001d5bd',
+        '\\<e>'                    : '\U0001d5be',
+        '\\<f>'                    : '\U0001d5bf',
+        '\\<g>'                    : '\U0001d5c0',
+        '\\<h>'                    : '\U0001d5c1',
+        '\\<i>'                    : '\U0001d5c2',
+        '\\<j>'                    : '\U0001d5c3',
+        '\\<k>'                    : '\U0001d5c4',
+        '\\<l>'                    : '\U0001d5c5',
+        '\\<m>'                    : '\U0001d5c6',
+        '\\<n>'                    : '\U0001d5c7',
+        '\\<o>'                    : '\U0001d5c8',
+        '\\<p>'                    : '\U0001d5c9',
+        '\\<q>'                    : '\U0001d5ca',
+        '\\<r>'                    : '\U0001d5cb',
+        '\\<s>'                    : '\U0001d5cc',
+        '\\<t>'                    : '\U0001d5cd',
+        '\\<u>'                    : '\U0001d5ce',
+        '\\<v>'                    : '\U0001d5cf',
+        '\\<w>'                    : '\U0001d5d0',
+        '\\<x>'                    : '\U0001d5d1',
+        '\\<y>'                    : '\U0001d5d2',
+        '\\<z>'                    : '\U0001d5d3',
+        '\\<AA>'                   : '\U0001d504',
+        '\\<BB>'                   : '\U0001d505',
+        '\\<CC>'                   : '\U0000212d',
+        '\\<DD>'                   : '\U0001d507',
+        '\\<EE>'                   : '\U0001d508',
+        '\\<FF>'                   : '\U0001d509',
+        '\\<GG>'                   : '\U0001d50a',
+        '\\<HH>'                   : '\U0000210c',
+        '\\<II>'                   : '\U00002111',
+        '\\<JJ>'                   : '\U0001d50d',
+        '\\<KK>'                   : '\U0001d50e',
+        '\\<LL>'                   : '\U0001d50f',
+        '\\<MM>'                   : '\U0001d510',
+        '\\<NN>'                   : '\U0001d511',
+        '\\<OO>'                   : '\U0001d512',
+        '\\<PP>'                   : '\U0001d513',
+        '\\<QQ>'                   : '\U0001d514',
+        '\\<RR>'                   : '\U0000211c',
+        '\\<SS>'                   : '\U0001d516',
+        '\\<TT>'                   : '\U0001d517',
+        '\\<UU>'                   : '\U0001d518',
+        '\\<VV>'                   : '\U0001d519',
+        '\\<WW>'                   : '\U0001d51a',
+        '\\<XX>'                   : '\U0001d51b',
+        '\\<YY>'                   : '\U0001d51c',
+        '\\<ZZ>'                   : '\U00002128',
+        '\\<aa>'                   : '\U0001d51e',
+        '\\<bb>'                   : '\U0001d51f',
+        '\\<cc>'                   : '\U0001d520',
+        '\\<dd>'                   : '\U0001d521',
+        '\\<ee>'                   : '\U0001d522',
+        '\\<ff>'                   : '\U0001d523',
+        '\\<gg>'                   : '\U0001d524',
+        '\\<hh>'                   : '\U0001d525',
+        '\\<ii>'                   : '\U0001d526',
+        '\\<jj>'                   : '\U0001d527',
+        '\\<kk>'                   : '\U0001d528',
+        '\\<ll>'                   : '\U0001d529',
+        '\\<mm>'                   : '\U0001d52a',
+        '\\<nn>'                   : '\U0001d52b',
+        '\\<oo>'                   : '\U0001d52c',
+        '\\<pp>'                   : '\U0001d52d',
+        '\\<qq>'                   : '\U0001d52e',
+        '\\<rr>'                   : '\U0001d52f',
+        '\\<ss>'                   : '\U0001d530',
+        '\\<tt>'                   : '\U0001d531',
+        '\\<uu>'                   : '\U0001d532',
+        '\\<vv>'                   : '\U0001d533',
+        '\\<ww>'                   : '\U0001d534',
+        '\\<xx>'                   : '\U0001d535',
+        '\\<yy>'                   : '\U0001d536',
+        '\\<zz>'                   : '\U0001d537',
+        '\\<alpha>'                : '\U000003b1',
+        '\\<beta>'                 : '\U000003b2',
+        '\\<gamma>'                : '\U000003b3',
+        '\\<delta>'                : '\U000003b4',
+        '\\<epsilon>'              : '\U000003b5',
+        '\\<zeta>'                 : '\U000003b6',
+        '\\<eta>'                  : '\U000003b7',
+        '\\<theta>'                : '\U000003b8',
+        '\\<iota>'                 : '\U000003b9',
+        '\\<kappa>'                : '\U000003ba',
+        '\\<lambda>'               : '\U000003bb',
+        '\\<mu>'                   : '\U000003bc',
+        '\\<nu>'                   : '\U000003bd',
+        '\\<xi>'                   : '\U000003be',
+        '\\<pi>'                   : '\U000003c0',
+        '\\<rho>'                  : '\U000003c1',
+        '\\<sigma>'                : '\U000003c3',
+        '\\<tau>'                  : '\U000003c4',
+        '\\<upsilon>'              : '\U000003c5',
+        '\\<phi>'                  : '\U000003c6',
+        '\\<chi>'                  : '\U000003c7',
+        '\\<psi>'                  : '\U000003c8',
+        '\\<omega>'                : '\U000003c9',
+        '\\<Gamma>'                : '\U00000393',
+        '\\<Delta>'                : '\U00000394',
+        '\\<Theta>'                : '\U00000398',
+        '\\<Lambda>'               : '\U0000039b',
+        '\\<Xi>'                   : '\U0000039e',
+        '\\<Pi>'                   : '\U000003a0',
+        '\\<Sigma>'                : '\U000003a3',
+        '\\<Upsilon>'              : '\U000003a5',
+        '\\<Phi>'                  : '\U000003a6',
+        '\\<Psi>'                  : '\U000003a8',
+        '\\<Omega>'                : '\U000003a9',
+        '\\<bool>'                 : '\U0001d539',
+        '\\<complex>'              : '\U00002102',
+        '\\<nat>'                  : '\U00002115',
+        '\\<rat>'                  : '\U0000211a',
+        '\\<real>'                 : '\U0000211d',
+        '\\<int>'                  : '\U00002124',
+        '\\<leftarrow>'            : '\U00002190',
+        '\\<longleftarrow>'        : '\U000027f5',
+        '\\<rightarrow>'           : '\U00002192',
+        '\\<longrightarrow>'       : '\U000027f6',
+        '\\<Leftarrow>'            : '\U000021d0',
+        '\\<Longleftarrow>'        : '\U000027f8',
+        '\\<Rightarrow>'           : '\U000021d2',
+        '\\<Longrightarrow>'       : '\U000027f9',
+        '\\<leftrightarrow>'       : '\U00002194',
+        '\\<longleftrightarrow>'   : '\U000027f7',
+        '\\<Leftrightarrow>'       : '\U000021d4',
+        '\\<Longleftrightarrow>'   : '\U000027fa',
+        '\\<mapsto>'               : '\U000021a6',
+        '\\<longmapsto>'           : '\U000027fc',
+        '\\<midarrow>'             : '\U00002500',
+        '\\<Midarrow>'             : '\U00002550',
+        '\\<hookleftarrow>'        : '\U000021a9',
+        '\\<hookrightarrow>'       : '\U000021aa',
+        '\\<leftharpoondown>'      : '\U000021bd',
+        '\\<rightharpoondown>'     : '\U000021c1',
+        '\\<leftharpoonup>'        : '\U000021bc',
+        '\\<rightharpoonup>'       : '\U000021c0',
+        '\\<rightleftharpoons>'    : '\U000021cc',
+        '\\<leadsto>'              : '\U0000219d',
+        '\\<downharpoonleft>'      : '\U000021c3',
+        '\\<downharpoonright>'     : '\U000021c2',
+        '\\<upharpoonleft>'        : '\U000021bf',
+        '\\<upharpoonright>'       : '\U000021be',
+        '\\<restriction>'          : '\U000021be',
+        '\\<Colon>'                : '\U00002237',
+        '\\<up>'                   : '\U00002191',
+        '\\<Up>'                   : '\U000021d1',
+        '\\<down>'                 : '\U00002193',
+        '\\<Down>'                 : '\U000021d3',
+        '\\<updown>'               : '\U00002195',
+        '\\<Updown>'               : '\U000021d5',
+        '\\<langle>'               : '\U000027e8',
+        '\\<rangle>'               : '\U000027e9',
+        '\\<lceil>'                : '\U00002308',
+        '\\<rceil>'                : '\U00002309',
+        '\\<lfloor>'               : '\U0000230a',
+        '\\<rfloor>'               : '\U0000230b',
+        '\\<lparr>'                : '\U00002987',
+        '\\<rparr>'                : '\U00002988',
+        '\\<lbrakk>'               : '\U000027e6',
+        '\\<rbrakk>'               : '\U000027e7',
+        '\\<lbrace>'               : '\U00002983',
+        '\\<rbrace>'               : '\U00002984',
+        '\\<guillemotleft>'        : '\U000000ab',
+        '\\<guillemotright>'       : '\U000000bb',
+        '\\<bottom>'               : '\U000022a5',
+        '\\<top>'                  : '\U000022a4',
+        '\\<and>'                  : '\U00002227',
+        '\\<And>'                  : '\U000022c0',
+        '\\<or>'                   : '\U00002228',
+        '\\<Or>'                   : '\U000022c1',
+        '\\<forall>'               : '\U00002200',
+        '\\<exists>'               : '\U00002203',
+        '\\<nexists>'              : '\U00002204',
+        '\\<not>'                  : '\U000000ac',
+        '\\<box>'                  : '\U000025a1',
+        '\\<diamond>'              : '\U000025c7',
+        '\\<turnstile>'            : '\U000022a2',
+        '\\<Turnstile>'            : '\U000022a8',
+        '\\<tturnstile>'           : '\U000022a9',
+        '\\<TTurnstile>'           : '\U000022ab',
+        '\\<stileturn>'            : '\U000022a3',
+        '\\<surd>'                 : '\U0000221a',
+        '\\<le>'                   : '\U00002264',
+        '\\<ge>'                   : '\U00002265',
+        '\\<lless>'                : '\U0000226a',
+        '\\<ggreater>'             : '\U0000226b',
+        '\\<lesssim>'              : '\U00002272',
+        '\\<greatersim>'           : '\U00002273',
+        '\\<lessapprox>'           : '\U00002a85',
+        '\\<greaterapprox>'        : '\U00002a86',
+        '\\<in>'                   : '\U00002208',
+        '\\<notin>'                : '\U00002209',
+        '\\<subset>'               : '\U00002282',
+        '\\<supset>'               : '\U00002283',
+        '\\<subseteq>'             : '\U00002286',
+        '\\<supseteq>'             : '\U00002287',
+        '\\<sqsubset>'             : '\U0000228f',
+        '\\<sqsupset>'             : '\U00002290',
+        '\\<sqsubseteq>'           : '\U00002291',
+        '\\<sqsupseteq>'           : '\U00002292',
+        '\\<inter>'                : '\U00002229',
+        '\\<Inter>'                : '\U000022c2',
+        '\\<union>'                : '\U0000222a',
+        '\\<Union>'                : '\U000022c3',
+        '\\<squnion>'              : '\U00002294',
+        '\\<Squnion>'              : '\U00002a06',
+        '\\<sqinter>'              : '\U00002293',
+        '\\<Sqinter>'              : '\U00002a05',
+        '\\<setminus>'             : '\U00002216',
+        '\\<propto>'               : '\U0000221d',
+        '\\<uplus>'                : '\U0000228e',
+        '\\<Uplus>'                : '\U00002a04',
+        '\\<noteq>'                : '\U00002260',
+        '\\<sim>'                  : '\U0000223c',
+        '\\<doteq>'                : '\U00002250',
+        '\\<simeq>'                : '\U00002243',
+        '\\<approx>'               : '\U00002248',
+        '\\<asymp>'                : '\U0000224d',
+        '\\<cong>'                 : '\U00002245',
+        '\\<smile>'                : '\U00002323',
+        '\\<equiv>'                : '\U00002261',
+        '\\<frown>'                : '\U00002322',
+        '\\<Join>'                 : '\U000022c8',
+        '\\<bowtie>'               : '\U00002a1d',
+        '\\<prec>'                 : '\U0000227a',
+        '\\<succ>'                 : '\U0000227b',
+        '\\<preceq>'               : '\U0000227c',
+        '\\<succeq>'               : '\U0000227d',
+        '\\<parallel>'             : '\U00002225',
+        '\\<bar>'                  : '\U000000a6',
+        '\\<plusminus>'            : '\U000000b1',
+        '\\<minusplus>'            : '\U00002213',
+        '\\<times>'                : '\U000000d7',
+        '\\<div>'                  : '\U000000f7',
+        '\\<cdot>'                 : '\U000022c5',
+        '\\<star>'                 : '\U000022c6',
+        '\\<bullet>'               : '\U00002219',
+        '\\<circ>'                 : '\U00002218',
+        '\\<dagger>'               : '\U00002020',
+        '\\<ddagger>'              : '\U00002021',
+        '\\<lhd>'                  : '\U000022b2',
+        '\\<rhd>'                  : '\U000022b3',
+        '\\<unlhd>'                : '\U000022b4',
+        '\\<unrhd>'                : '\U000022b5',
+        '\\<triangleleft>'         : '\U000025c3',
+        '\\<triangleright>'        : '\U000025b9',
+        '\\<triangle>'             : '\U000025b3',
+        '\\<triangleq>'            : '\U0000225c',
+        '\\<oplus>'                : '\U00002295',
+        '\\<Oplus>'                : '\U00002a01',
+        '\\<otimes>'               : '\U00002297',
+        '\\<Otimes>'               : '\U00002a02',
+        '\\<odot>'                 : '\U00002299',
+        '\\<Odot>'                 : '\U00002a00',
+        '\\<ominus>'               : '\U00002296',
+        '\\<oslash>'               : '\U00002298',
+        '\\<dots>'                 : '\U00002026',
+        '\\<cdots>'                : '\U000022ef',
+        '\\<Sum>'                  : '\U00002211',
+        '\\<Prod>'                 : '\U0000220f',
+        '\\<Coprod>'               : '\U00002210',
+        '\\<infinity>'             : '\U0000221e',
+        '\\<integral>'             : '\U0000222b',
+        '\\<ointegral>'            : '\U0000222e',
+        '\\<clubsuit>'             : '\U00002663',
+        '\\<diamondsuit>'          : '\U00002662',
+        '\\<heartsuit>'            : '\U00002661',
+        '\\<spadesuit>'            : '\U00002660',
+        '\\<aleph>'                : '\U00002135',
+        '\\<emptyset>'             : '\U00002205',
+        '\\<nabla>'                : '\U00002207',
+        '\\<partial>'              : '\U00002202',
+        '\\<flat>'                 : '\U0000266d',
+        '\\<natural>'              : '\U0000266e',
+        '\\<sharp>'                : '\U0000266f',
+        '\\<angle>'                : '\U00002220',
+        '\\<copyright>'            : '\U000000a9',
+        '\\<registered>'           : '\U000000ae',
+        '\\<hyphen>'               : '\U000000ad',
+        '\\<inverse>'              : '\U000000af',
+        '\\<onequarter>'           : '\U000000bc',
+        '\\<onehalf>'              : '\U000000bd',
+        '\\<threequarters>'        : '\U000000be',
+        '\\<ordfeminine>'          : '\U000000aa',
+        '\\<ordmasculine>'         : '\U000000ba',
+        '\\<section>'              : '\U000000a7',
+        '\\<paragraph>'            : '\U000000b6',
+        '\\<exclamdown>'           : '\U000000a1',
+        '\\<questiondown>'         : '\U000000bf',
+        '\\<euro>'                 : '\U000020ac',
+        '\\<pounds>'               : '\U000000a3',
+        '\\<yen>'                  : '\U000000a5',
+        '\\<cent>'                 : '\U000000a2',
+        '\\<currency>'             : '\U000000a4',
+        '\\<degree>'               : '\U000000b0',
+        '\\<amalg>'                : '\U00002a3f',
+        '\\<mho>'                  : '\U00002127',
+        '\\<lozenge>'              : '\U000025ca',
+        '\\<wp>'                   : '\U00002118',
+        '\\<wrong>'                : '\U00002240',
+        '\\<struct>'               : '\U000022c4',
+        '\\<acute>'                : '\U000000b4',
+        '\\<index>'                : '\U00000131',
+        '\\<dieresis>'             : '\U000000a8',
+        '\\<cedilla>'              : '\U000000b8',
+        '\\<hungarumlaut>'         : '\U000002dd',
+        '\\<some>'                 : '\U000003f5',
+        '\\<newline>'              : '\U000023ce',
+        '\\<open>'                 : '\U00002039',
+        '\\<close>'                : '\U0000203a',
+        '\\<here>'                 : '\U00002302',
+        '\\<^sub>'                 : '\U000021e9',
+        '\\<^sup>'                 : '\U000021e7',
+        '\\<^bold>'                : '\U00002759',
+        '\\<^bsub>'                : '\U000021d8',
+        '\\<^esub>'                : '\U000021d9',
+        '\\<^bsup>'                : '\U000021d7',
+        '\\<^esup>'                : '\U000021d6',
+    }
+
+    lang_map = {'isabelle' : isabelle_symbols, 'latex' : latex_symbols}
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        lang = get_choice_opt(options, 'lang',
+                              ['isabelle', 'latex'], 'isabelle')
+        self.symbols = self.lang_map[lang]
+
+    def filter(self, lexer, stream):
+        for ttype, value in stream:
+            if value in self.symbols:
+                yield ttype, self.symbols[value]
+            else:
+                yield ttype, value
+
+
+class KeywordCaseFilter(Filter):
+    """Convert keywords to lowercase or uppercase or capitalize them, which
+    means first letter uppercase, rest lowercase.
+
+    This can be useful e.g. if you highlight Pascal code and want to adapt the
+    code to your styleguide.
+
+    Options accepted:
+
+    `case` : string
+       The casing to convert keywords to. Must be one of ``'lower'``,
+       ``'upper'`` or ``'capitalize'``.  The default is ``'lower'``.
+    """
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        case = get_choice_opt(options, 'case',
+                              ['lower', 'upper', 'capitalize'], 'lower')
+        self.convert = getattr(str, case)
+
+    def filter(self, lexer, stream):
+        for ttype, value in stream:
+            if ttype in Keyword:
+                yield ttype, self.convert(value)
+            else:
+                yield ttype, value
+
+
+class NameHighlightFilter(Filter):
+    """Highlight a normal Name (and Name.*) token with a different token type.
+
+    Example::
+
+        filter = NameHighlightFilter(
+            names=['foo', 'bar', 'baz'],
+            tokentype=Name.Function,
+        )
+
+    This would highlight the names "foo", "bar" and "baz"
+    as functions. `Name.Function` is the default token type.
+
+    Options accepted:
+
+    `names` : list of strings
+      A list of names that should be given the different token type.
+      There is no default.
+    `tokentype` : TokenType or string
+      A token type or a string containing a token type name that is
+      used for highlighting the strings in `names`.  The default is
+      `Name.Function`.
+    """
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        self.names = set(get_list_opt(options, 'names', []))
+        tokentype = options.get('tokentype')
+        if tokentype:
+            self.tokentype = string_to_tokentype(tokentype)
+        else:
+            self.tokentype = Name.Function
+
+    def filter(self, lexer, stream):
+        for ttype, value in stream:
+            if ttype in Name and value in self.names:
+                yield self.tokentype, value
+            else:
+                yield ttype, value
+
+
+class ErrorToken(Exception):
+    pass
+
+
+class RaiseOnErrorTokenFilter(Filter):
+    """Raise an exception when the lexer generates an error token.
+
+    Options accepted:
+
+    `excclass` : Exception class
+      The exception class to raise.
+      The default is `pygments.filters.ErrorToken`.
+
+    .. versionadded:: 0.8
+    """
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        self.exception = options.get('excclass', ErrorToken)
+        try:
+            # issubclass() will raise TypeError if first argument is not a class
+            if not issubclass(self.exception, Exception):
+                raise TypeError
+        except TypeError:
+            raise OptionError('excclass option is not an exception class')
+
+    def filter(self, lexer, stream):
+        for ttype, value in stream:
+            if ttype is Error:
+                raise self.exception(value)
+            yield ttype, value
+
+
+class VisibleWhitespaceFilter(Filter):
+    """Convert tabs, newlines and/or spaces to visible characters.
+
+    Options accepted:
+
+    `spaces` : string or bool
+      If this is a one-character string, spaces will be replaces by this string.
+      If it is another true value, spaces will be replaced by ``·`` (unicode
+      MIDDLE DOT).  If it is a false value, spaces will not be replaced.  The
+      default is ``False``.
+    `tabs` : string or bool
+      The same as for `spaces`, but the default replacement character is ``»``
+      (unicode RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK).  The default value
+      is ``False``.  Note: this will not work if the `tabsize` option for the
+      lexer is nonzero, as tabs will already have been expanded then.
+    `tabsize` : int
+      If tabs are to be replaced by this filter (see the `tabs` option), this
+      is the total number of characters that a tab should be expanded to.
+      The default is ``8``.
+    `newlines` : string or bool
+      The same as for `spaces`, but the default replacement character is ``¶``
+      (unicode PILCROW SIGN).  The default value is ``False``.
+    `wstokentype` : bool
+      If true, give whitespace the special `Whitespace` token type.  This allows
+      styling the visible whitespace differently (e.g. greyed out), but it can
+      disrupt background colors.  The default is ``True``.
+
+    .. versionadded:: 0.8
+    """
+
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        for name, default in [('spaces',   '·'),
+                              ('tabs',     '»'),
+                              ('newlines', '¶')]:
+            opt = options.get(name, False)
+            if isinstance(opt, str) and len(opt) == 1:
+                setattr(self, name, opt)
+            else:
+                setattr(self, name, (opt and default or ''))
+        tabsize = get_int_opt(options, 'tabsize', 8)
+        if self.tabs:
+            self.tabs += ' ' * (tabsize - 1)
+        if self.newlines:
+            self.newlines += '\n'
+        self.wstt = get_bool_opt(options, 'wstokentype', True)
+
+    def filter(self, lexer, stream):
+        if self.wstt:
+            spaces = self.spaces or ' '
+            tabs = self.tabs or '\t'
+            newlines = self.newlines or '\n'
+            regex = re.compile(r'\s')
+
+            def replacefunc(wschar):
+                if wschar == ' ':
+                    return spaces
+                elif wschar == '\t':
+                    return tabs
+                elif wschar == '\n':
+                    return newlines
+                return wschar
+
+            for ttype, value in stream:
+                yield from _replace_special(ttype, value, regex, Whitespace,
+                                            replacefunc)
+        else:
+            spaces, tabs, newlines = self.spaces, self.tabs, self.newlines
+            # simpler processing
+            for ttype, value in stream:
+                if spaces:
+                    value = value.replace(' ', spaces)
+                if tabs:
+                    value = value.replace('\t', tabs)
+                if newlines:
+                    value = value.replace('\n', newlines)
+                yield ttype, value
+
+
+class GobbleFilter(Filter):
+    """Gobbles source code lines (eats initial characters).
+
+    This filter drops the first ``n`` characters off every line of code.  This
+    may be useful when the source code fed to the lexer is indented by a fixed
+    amount of space that isn't desired in the output.
+
+    Options accepted:
+
+    `n` : int
+       The number of characters to gobble.
+
+    .. versionadded:: 1.2
+    """
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+        self.n = get_int_opt(options, 'n', 0)
+
+    def gobble(self, value, left):
+        if left < len(value):
+            return value[left:], 0
+        else:
+            return '', left - len(value)
+
+    def filter(self, lexer, stream):
+        n = self.n
+        left = n  # How many characters left to gobble.
+        for ttype, value in stream:
+            # Remove ``left`` tokens from first line, ``n`` from all others.
+            parts = value.split('\n')
+            (parts[0], left) = self.gobble(parts[0], left)
+            for i in range(1, len(parts)):
+                (parts[i], left) = self.gobble(parts[i], n)
+            value = '\n'.join(parts)
+
+            if value != '':
+                yield ttype, value
+
+
+class TokenMergeFilter(Filter):
+    """Merges consecutive tokens with the same token type in the output
+    stream of a lexer.
+
+    .. versionadded:: 1.2
+    """
+    def __init__(self, **options):
+        Filter.__init__(self, **options)
+
+    def filter(self, lexer, stream):
+        current_type = None
+        current_value = None
+        for ttype, value in stream:
+            if ttype is current_type:
+                current_value += value
+            else:
+                if current_type is not None:
+                    yield current_type, current_value
+                current_type = ttype
+                current_value = value
+        if current_type is not None:
+            yield current_type, current_value
+
+
+FILTERS = {
+    'codetagify':     CodeTagFilter,
+    'keywordcase':    KeywordCaseFilter,
+    'highlight':      NameHighlightFilter,
+    'raiseonerror':   RaiseOnErrorTokenFilter,
+    'whitespace':     VisibleWhitespaceFilter,
+    'gobble':         GobbleFilter,
+    'tokenmerge':     TokenMergeFilter,
+    'symbols':        SymbolFilter,
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..6396ee6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/filters/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatter.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatter.py
new file mode 100644
index 0000000..a2349ef
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatter.py
@@ -0,0 +1,94 @@
+"""
+    pygments.formatter
+    ~~~~~~~~~~~~~~~~~~
+
+    Base formatter class.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import codecs
+
+from pip._vendor.pygments.util import get_bool_opt
+from pip._vendor.pygments.styles import get_style_by_name
+
+__all__ = ['Formatter']
+
+
+def _lookup_style(style):
+    if isinstance(style, str):
+        return get_style_by_name(style)
+    return style
+
+
+class Formatter:
+    """
+    Converts a token stream to text.
+
+    Options accepted:
+
+    ``style``
+        The style to use, can be a string or a Style subclass
+        (default: "default"). Not used by e.g. the
+        TerminalFormatter.
+    ``full``
+        Tells the formatter to output a "full" document, i.e.
+        a complete self-contained document. This doesn't have
+        any effect for some formatters (default: false).
+    ``title``
+        If ``full`` is true, the title that should be used to
+        caption the document (default: '').
+    ``encoding``
+        If given, must be an encoding name. This will be used to
+        convert the Unicode token strings to byte strings in the
+        output. If it is "" or None, Unicode strings will be written
+        to the output file, which most file-like objects do not
+        support (default: None).
+    ``outencoding``
+        Overrides ``encoding`` if given.
+    """
+
+    #: Name of the formatter
+    name = None
+
+    #: Shortcuts for the formatter
+    aliases = []
+
+    #: fn match rules
+    filenames = []
+
+    #: If True, this formatter outputs Unicode strings when no encoding
+    #: option is given.
+    unicodeoutput = True
+
+    def __init__(self, **options):
+        self.style = _lookup_style(options.get('style', 'default'))
+        self.full = get_bool_opt(options, 'full', False)
+        self.title = options.get('title', '')
+        self.encoding = options.get('encoding', None) or None
+        if self.encoding in ('guess', 'chardet'):
+            # can happen for e.g. pygmentize -O encoding=guess
+            self.encoding = 'utf-8'
+        self.encoding = options.get('outencoding') or self.encoding
+        self.options = options
+
+    def get_style_defs(self, arg=''):
+        """
+        Return the style definitions for the current style as a string.
+
+        ``arg`` is an additional argument whose meaning depends on the
+        formatter used. Note that ``arg`` can also be a list or tuple
+        for some formatters like the html formatter.
+        """
+        return ''
+
+    def format(self, tokensource, outfile):
+        """
+        Format ``tokensource``, an iterable of ``(tokentype, tokenstring)``
+        tuples and write it into ``outfile``.
+        """
+        if self.encoding:
+            # wrap the outfile in a StreamWriter
+            outfile = codecs.lookup(self.encoding)[3](outfile)
+        return self.format_unencoded(tokensource, outfile)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__init__.py
new file mode 100644
index 0000000..43c4c89
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__init__.py
@@ -0,0 +1,143 @@
+"""
+    pygments.formatters
+    ~~~~~~~~~~~~~~~~~~~
+
+    Pygments formatters.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+import sys
+import types
+from fnmatch import fnmatch
+from os.path import basename
+
+from pip._vendor.pygments.formatters._mapping import FORMATTERS
+from pip._vendor.pygments.plugin import find_plugin_formatters
+from pip._vendor.pygments.util import ClassNotFound
+
+__all__ = ['get_formatter_by_name', 'get_formatter_for_filename',
+           'get_all_formatters', 'load_formatter_from_file'] + list(FORMATTERS)
+
+_formatter_cache = {}  # classes by name
+
+def _load_formatters(module_name):
+    """Load a formatter (and all others in the module too)."""
+    mod = __import__(module_name, None, None, ['__all__'])
+    for formatter_name in mod.__all__:
+        cls = getattr(mod, formatter_name)
+        _formatter_cache[cls.name] = cls
+
+
+def get_all_formatters():
+    """Return a generator for all formatter classes."""
+    # NB: this returns formatter classes, not info like get_all_lexers().
+    for info in FORMATTERS.values():
+        if info[1] not in _formatter_cache:
+            _load_formatters(info[0])
+        yield _formatter_cache[info[1]]
+    for _, formatter in find_plugin_formatters():
+        yield formatter
+
+
+def find_formatter_class(alias):
+    """Lookup a formatter by alias.
+
+    Returns None if not found.
+    """
+    for module_name, name, aliases, _, _ in FORMATTERS.values():
+        if alias in aliases:
+            if name not in _formatter_cache:
+                _load_formatters(module_name)
+            return _formatter_cache[name]
+    for _, cls in find_plugin_formatters():
+        if alias in cls.aliases:
+            return cls
+
+
+def get_formatter_by_name(_alias, **options):
+    """Lookup and instantiate a formatter by alias.
+
+    Raises ClassNotFound if not found.
+    """
+    cls = find_formatter_class(_alias)
+    if cls is None:
+        raise ClassNotFound("no formatter found for name %r" % _alias)
+    return cls(**options)
+
+
+def load_formatter_from_file(filename, formattername="CustomFormatter",
+                             **options):
+    """Load a formatter from a file.
+
+    This method expects a file located relative to the current working
+    directory, which contains a class named CustomFormatter. By default,
+    it expects the Formatter to be named CustomFormatter; you can specify
+    your own class name as the second argument to this function.
+
+    Users should be very careful with the input, because this method
+    is equivalent to running eval on the input file.
+
+    Raises ClassNotFound if there are any problems importing the Formatter.
+
+    .. versionadded:: 2.2
+    """
+    try:
+        # This empty dict will contain the namespace for the exec'd file
+        custom_namespace = {}
+        with open(filename, 'rb') as f:
+            exec(f.read(), custom_namespace)
+        # Retrieve the class `formattername` from that namespace
+        if formattername not in custom_namespace:
+            raise ClassNotFound('no valid %s class found in %s' %
+                                (formattername, filename))
+        formatter_class = custom_namespace[formattername]
+        # And finally instantiate it with the options
+        return formatter_class(**options)
+    except OSError as err:
+        raise ClassNotFound('cannot read %s: %s' % (filename, err))
+    except ClassNotFound:
+        raise
+    except Exception as err:
+        raise ClassNotFound('error when loading custom formatter: %s' % err)
+
+
+def get_formatter_for_filename(fn, **options):
+    """Lookup and instantiate a formatter by filename pattern.
+
+    Raises ClassNotFound if not found.
+    """
+    fn = basename(fn)
+    for modname, name, _, filenames, _ in FORMATTERS.values():
+        for filename in filenames:
+            if fnmatch(fn, filename):
+                if name not in _formatter_cache:
+                    _load_formatters(modname)
+                return _formatter_cache[name](**options)
+    for cls in find_plugin_formatters():
+        for filename in cls.filenames:
+            if fnmatch(fn, filename):
+                return cls(**options)
+    raise ClassNotFound("no formatter found for file name %r" % fn)
+
+
+class _automodule(types.ModuleType):
+    """Automatically import formatters."""
+
+    def __getattr__(self, name):
+        info = FORMATTERS.get(name)
+        if info:
+            _load_formatters(info[0])
+            cls = _formatter_cache[info[1]]
+            setattr(self, name, cls)
+            return cls
+        raise AttributeError(name)
+
+
+oldmod = sys.modules[__name__]
+newmod = _automodule(__name__)
+newmod.__dict__.update(oldmod.__dict__)
+sys.modules[__name__] = newmod
+del newmod.newmod, newmod.oldmod, newmod.sys, newmod.types
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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new file mode 100644
index 0000000..40c32c7
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/groff.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/groff.cpython-39.pyc
new file mode 100644
index 0000000..f7bf3a8
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new file mode 100644
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new file mode 100644
index 0000000..2b1894b
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/img.cpython-39.pyc
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new file mode 100644
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new file mode 100644
index 0000000..88db230
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/pangomarkup.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/pangomarkup.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/svg.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/svg.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/terminal.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/terminal.cpython-39.pyc
new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/terminal256.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/__pycache__/terminal256.cpython-39.pyc
new file mode 100644
index 0000000..3feacc4
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/_mapping.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/_mapping.py
new file mode 100644
index 0000000..6e34f96
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/_mapping.py
@@ -0,0 +1,23 @@
+# Automatically generated by scripts/gen_mapfiles.py.
+# DO NOT EDIT BY HAND; run `make mapfiles` instead.
+
+FORMATTERS = {
+    'BBCodeFormatter': ('pygments.formatters.bbcode', 'BBCode', ('bbcode', 'bb'), (), 'Format tokens with BBcodes. These formatting codes are used by many bulletin boards, so you can highlight your sourcecode with pygments before posting it there.'),
+    'BmpImageFormatter': ('pygments.formatters.img', 'img_bmp', ('bmp', 'bitmap'), ('*.bmp',), 'Create a bitmap image from source code. This uses the Python Imaging Library to generate a pixmap from the source code.'),
+    'GifImageFormatter': ('pygments.formatters.img', 'img_gif', ('gif',), ('*.gif',), 'Create a GIF image from source code. This uses the Python Imaging Library to generate a pixmap from the source code.'),
+    'GroffFormatter': ('pygments.formatters.groff', 'groff', ('groff', 'troff', 'roff'), (), 'Format tokens with groff escapes to change their color and font style.'),
+    'HtmlFormatter': ('pygments.formatters.html', 'HTML', ('html',), ('*.html', '*.htm'), "Format tokens as HTML 4 ``<span>`` tags within a ``<pre>`` tag, wrapped in a ``<div>`` tag. The ``<div>``'s CSS class can be set by the `cssclass` option."),
+    'IRCFormatter': ('pygments.formatters.irc', 'IRC', ('irc', 'IRC'), (), 'Format tokens with IRC color sequences'),
+    'ImageFormatter': ('pygments.formatters.img', 'img', ('img', 'IMG', 'png'), ('*.png',), 'Create a PNG image from source code. This uses the Python Imaging Library to generate a pixmap from the source code.'),
+    'JpgImageFormatter': ('pygments.formatters.img', 'img_jpg', ('jpg', 'jpeg'), ('*.jpg',), 'Create a JPEG image from source code. This uses the Python Imaging Library to generate a pixmap from the source code.'),
+    'LatexFormatter': ('pygments.formatters.latex', 'LaTeX', ('latex', 'tex'), ('*.tex',), 'Format tokens as LaTeX code. This needs the `fancyvrb` and `color` standard packages.'),
+    'NullFormatter': ('pygments.formatters.other', 'Text only', ('text', 'null'), ('*.txt',), 'Output the text unchanged without any formatting.'),
+    'PangoMarkupFormatter': ('pygments.formatters.pangomarkup', 'Pango Markup', ('pango', 'pangomarkup'), (), 'Format tokens as Pango Markup code. It can then be rendered to an SVG.'),
+    'RawTokenFormatter': ('pygments.formatters.other', 'Raw tokens', ('raw', 'tokens'), ('*.raw',), 'Format tokens as a raw representation for storing token streams.'),
+    'RtfFormatter': ('pygments.formatters.rtf', 'RTF', ('rtf',), ('*.rtf',), 'Format tokens as RTF markup. This formatter automatically outputs full RTF documents with color information and other useful stuff. Perfect for Copy and Paste into Microsoft(R) Word(R) documents.'),
+    'SvgFormatter': ('pygments.formatters.svg', 'SVG', ('svg',), ('*.svg',), 'Format tokens as an SVG graphics file.  This formatter is still experimental. Each line of code is a ``<text>`` element with explicit ``x`` and ``y`` coordinates containing ``<tspan>`` elements with the individual token styles.'),
+    'Terminal256Formatter': ('pygments.formatters.terminal256', 'Terminal256', ('terminal256', 'console256', '256'), (), 'Format tokens with ANSI color sequences, for output in a 256-color terminal or console.  Like in `TerminalFormatter` color sequences are terminated at newlines, so that paging the output works correctly.'),
+    'TerminalFormatter': ('pygments.formatters.terminal', 'Terminal', ('terminal', 'console'), (), 'Format tokens with ANSI color sequences, for output in a text console. Color sequences are terminated at newlines, so that paging the output works correctly.'),
+    'TerminalTrueColorFormatter': ('pygments.formatters.terminal256', 'TerminalTrueColor', ('terminal16m', 'console16m', '16m'), (), 'Format tokens with ANSI color sequences, for output in a true-color terminal or console.  Like in `TerminalFormatter` color sequences are terminated at newlines, so that paging the output works correctly.'),
+    'TestcaseFormatter': ('pygments.formatters.other', 'Testcase', ('testcase',), (), 'Format tokens as appropriate for a new testcase.'),
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/bbcode.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/bbcode.py
new file mode 100644
index 0000000..2be2b4e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/bbcode.py
@@ -0,0 +1,108 @@
+"""
+    pygments.formatters.bbcode
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    BBcode formatter.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.util import get_bool_opt
+
+__all__ = ['BBCodeFormatter']
+
+
+class BBCodeFormatter(Formatter):
+    """
+    Format tokens with BBcodes. These formatting codes are used by many
+    bulletin boards, so you can highlight your sourcecode with pygments before
+    posting it there.
+
+    This formatter has no support for background colors and borders, as there
+    are no common BBcode tags for that.
+
+    Some board systems (e.g. phpBB) don't support colors in their [code] tag,
+    so you can't use the highlighting together with that tag.
+    Text in a [code] tag usually is shown with a monospace font (which this
+    formatter can do with the ``monofont`` option) and no spaces (which you
+    need for indentation) are removed.
+
+    Additional options accepted:
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+
+    `codetag`
+        If set to true, put the output into ``[code]`` tags (default:
+        ``false``)
+
+    `monofont`
+        If set to true, add a tag to show the code with a monospace font
+        (default: ``false``).
+    """
+    name = 'BBCode'
+    aliases = ['bbcode', 'bb']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self._code = get_bool_opt(options, 'codetag', False)
+        self._mono = get_bool_opt(options, 'monofont', False)
+
+        self.styles = {}
+        self._make_styles()
+
+    def _make_styles(self):
+        for ttype, ndef in self.style:
+            start = end = ''
+            if ndef['color']:
+                start += '[color=#%s]' % ndef['color']
+                end = '[/color]' + end
+            if ndef['bold']:
+                start += '[b]'
+                end = '[/b]' + end
+            if ndef['italic']:
+                start += '[i]'
+                end = '[/i]' + end
+            if ndef['underline']:
+                start += '[u]'
+                end = '[/u]' + end
+            # there are no common BBcodes for background-color and border
+
+            self.styles[ttype] = start, end
+
+    def format_unencoded(self, tokensource, outfile):
+        if self._code:
+            outfile.write('[code]')
+        if self._mono:
+            outfile.write('[font=monospace]')
+
+        lastval = ''
+        lasttype = None
+
+        for ttype, value in tokensource:
+            while ttype not in self.styles:
+                ttype = ttype.parent
+            if ttype == lasttype:
+                lastval += value
+            else:
+                if lastval:
+                    start, end = self.styles[lasttype]
+                    outfile.write(''.join((start, lastval, end)))
+                lastval = value
+                lasttype = ttype
+
+        if lastval:
+            start, end = self.styles[lasttype]
+            outfile.write(''.join((start, lastval, end)))
+
+        if self._mono:
+            outfile.write('[/font]')
+        if self._code:
+            outfile.write('[/code]')
+        if self._code or self._mono:
+            outfile.write('\n')
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/groff.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/groff.py
new file mode 100644
index 0000000..f3dcbce
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/groff.py
@@ -0,0 +1,170 @@
+"""
+    pygments.formatters.groff
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for groff output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import math
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt
+
+__all__ = ['GroffFormatter']
+
+
+class GroffFormatter(Formatter):
+    """
+    Format tokens with groff escapes to change their color and font style.
+
+    .. versionadded:: 2.11
+
+    Additional options accepted:
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+
+    `monospaced`
+        If set to true, monospace font will be used (default: ``true``).
+
+    `linenos`
+        If set to true, print the line numbers (default: ``false``).
+
+    `wrap`
+        Wrap lines to the specified number of characters. Disabled if set to 0
+        (default: ``0``).
+    """
+
+    name = 'groff'
+    aliases = ['groff','troff','roff']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+
+        self.monospaced = get_bool_opt(options, 'monospaced', True)
+        self.linenos = get_bool_opt(options, 'linenos', False)
+        self._lineno = 0
+        self.wrap = get_int_opt(options, 'wrap', 0)
+        self._linelen = 0
+
+        self.styles = {}
+        self._make_styles()
+
+
+    def _make_styles(self):
+        regular = '\\f[CR]' if self.monospaced else '\\f[R]'
+        bold = '\\f[CB]' if self.monospaced else '\\f[B]'
+        italic = '\\f[CI]' if self.monospaced else '\\f[I]'
+
+        for ttype, ndef in self.style:
+            start = end = ''
+            if ndef['color']:
+                start += '\\m[%s]' % ndef['color']
+                end = '\\m[]' + end
+            if ndef['bold']:
+                start += bold
+                end = regular + end
+            if ndef['italic']:
+                start += italic
+                end = regular + end
+            if ndef['bgcolor']:
+                start += '\\M[%s]' % ndef['bgcolor']
+                end = '\\M[]' + end
+
+            self.styles[ttype] = start, end
+
+
+    def _define_colors(self, outfile):
+        colors = set()
+        for _, ndef in self.style:
+            if ndef['color'] is not None:
+                colors.add(ndef['color'])
+
+        for color in colors:
+            outfile.write('.defcolor ' + color + ' rgb #' + color + '\n')
+
+
+    def _write_lineno(self, outfile):
+        self._lineno += 1
+        outfile.write("%s% 4d " % (self._lineno != 1 and '\n' or '', self._lineno))
+
+
+    def _wrap_line(self, line):
+        length = len(line.rstrip('\n'))
+        space = '     ' if self.linenos else ''
+        newline = ''
+
+        if length > self.wrap:
+            for i in range(0, math.floor(length / self.wrap)):
+                chunk = line[i*self.wrap:i*self.wrap+self.wrap]
+                newline += (chunk + '\n' + space)
+            remainder = length % self.wrap
+            if remainder > 0:
+                newline += line[-remainder-1:]
+                self._linelen = remainder
+        elif self._linelen + length > self.wrap:
+            newline = ('\n' + space) + line
+            self._linelen = length
+        else:
+            newline = line
+            self._linelen += length
+
+        return newline
+
+
+    def _escape_chars(self, text):
+        text = text.replace('\\', '\\[u005C]'). \
+                    replace('.', '\\[char46]'). \
+                    replace('\'', '\\[u0027]'). \
+                    replace('`', '\\[u0060]'). \
+                    replace('~', '\\[u007E]')
+        copy = text
+
+        for char in copy:
+            if len(char) != len(char.encode()):
+                uni = char.encode('unicode_escape') \
+                    .decode()[1:] \
+                    .replace('x', 'u00') \
+                    .upper()
+                text = text.replace(char, '\\[u' + uni[1:] + ']')
+
+        return text
+
+
+    def format_unencoded(self, tokensource, outfile):
+        self._define_colors(outfile)
+
+        outfile.write('.nf\n\\f[CR]\n')
+
+        if self.linenos:
+            self._write_lineno(outfile)
+
+        for ttype, value in tokensource:
+            while ttype not in self.styles:
+                ttype = ttype.parent
+            start, end = self.styles[ttype]
+
+            for line in value.splitlines(True):
+                if self.wrap > 0:
+                    line = self._wrap_line(line)
+
+                if start and end:
+                    text = self._escape_chars(line.rstrip('\n'))
+                    if text != '':
+                        outfile.write(''.join((start, text, end)))
+                else:
+                    outfile.write(self._escape_chars(line.rstrip('\n')))
+
+                if line.endswith('\n'):
+                    if self.linenos:
+                        self._write_lineno(outfile)
+                        self._linelen = 0
+                    else:
+                        outfile.write('\n')
+                        self._linelen = 0
+
+        outfile.write('\n.fi')
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/html.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/html.py
new file mode 100644
index 0000000..d5cda4c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/html.py
@@ -0,0 +1,989 @@
+"""
+    pygments.formatters.html
+    ~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for HTML output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import functools
+import os
+import sys
+import os.path
+from io import StringIO
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.token import Token, Text, STANDARD_TYPES
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt, get_list_opt
+
+try:
+    import ctags
+except ImportError:
+    ctags = None
+
+__all__ = ['HtmlFormatter']
+
+
+_escape_html_table = {
+    ord('&'): '&amp;',
+    ord('<'): '&lt;',
+    ord('>'): '&gt;',
+    ord('"'): '&quot;',
+    ord("'"): '&#39;',
+}
+
+
+def escape_html(text, table=_escape_html_table):
+    """Escape &, <, > as well as single and double quotes for HTML."""
+    return text.translate(table)
+
+
+def webify(color):
+    if color.startswith('calc') or color.startswith('var'):
+        return color
+    else:
+        return '#' + color
+
+
+def _get_ttype_class(ttype):
+    fname = STANDARD_TYPES.get(ttype)
+    if fname:
+        return fname
+    aname = ''
+    while fname is None:
+        aname = '-' + ttype[-1] + aname
+        ttype = ttype.parent
+        fname = STANDARD_TYPES.get(ttype)
+    return fname + aname
+
+
+CSSFILE_TEMPLATE = '''\
+/*
+generated by Pygments <https://pygments.org/>
+Copyright 2006-2022 by the Pygments team.
+Licensed under the BSD license, see LICENSE for details.
+*/
+%(styledefs)s
+'''
+
+DOC_HEADER = '''\
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
+   "http://www.w3.org/TR/html4/strict.dtd">
+<!--
+generated by Pygments <https://pygments.org/>
+Copyright 2006-2022 by the Pygments team.
+Licensed under the BSD license, see LICENSE for details.
+-->
+<html>
+<head>
+  <title>%(title)s</title>
+  <meta http-equiv="content-type" content="text/html; charset=%(encoding)s">
+  <style type="text/css">
+''' + CSSFILE_TEMPLATE + '''
+  </style>
+</head>
+<body>
+<h2>%(title)s</h2>
+
+'''
+
+DOC_HEADER_EXTERNALCSS = '''\
+<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
+   "http://www.w3.org/TR/html4/strict.dtd">
+
+<html>
+<head>
+  <title>%(title)s</title>
+  <meta http-equiv="content-type" content="text/html; charset=%(encoding)s">
+  <link rel="stylesheet" href="%(cssfile)s" type="text/css">
+</head>
+<body>
+<h2>%(title)s</h2>
+
+'''
+
+DOC_FOOTER = '''\
+</body>
+</html>
+'''
+
+
+class HtmlFormatter(Formatter):
+    r"""
+    Format tokens as HTML 4 ``<span>`` tags within a ``<pre>`` tag, wrapped
+    in a ``<div>`` tag. The ``<div>``'s CSS class can be set by the `cssclass`
+    option.
+
+    If the `linenos` option is set to ``"table"``, the ``<pre>`` is
+    additionally wrapped inside a ``<table>`` which has one row and two
+    cells: one containing the line numbers and one containing the code.
+    Example:
+
+    .. sourcecode:: html
+
+        <div class="highlight" >
+        <table><tr>
+          <td class="linenos" title="click to toggle"
+            onclick="with (this.firstChild.style)
+                     { display = (display == '') ? 'none' : '' }">
+            <pre>1
+            2</pre>
+          </td>
+          <td class="code">
+            <pre><span class="Ke">def </span><span class="NaFu">foo</span>(bar):
+              <span class="Ke">pass</span>
+            </pre>
+          </td>
+        </tr></table></div>
+
+    (whitespace added to improve clarity).
+
+    Wrapping can be disabled using the `nowrap` option.
+
+    A list of lines can be specified using the `hl_lines` option to make these
+    lines highlighted (as of Pygments 0.11).
+
+    With the `full` option, a complete HTML 4 document is output, including
+    the style definitions inside a ``<style>`` tag, or in a separate file if
+    the `cssfile` option is given.
+
+    When `tagsfile` is set to the path of a ctags index file, it is used to
+    generate hyperlinks from names to their definition.  You must enable
+    `lineanchors` and run ctags with the `-n` option for this to work.  The
+    `python-ctags` module from PyPI must be installed to use this feature;
+    otherwise a `RuntimeError` will be raised.
+
+    The `get_style_defs(arg='')` method of a `HtmlFormatter` returns a string
+    containing CSS rules for the CSS classes used by the formatter. The
+    argument `arg` can be used to specify additional CSS selectors that
+    are prepended to the classes. A call `fmter.get_style_defs('td .code')`
+    would result in the following CSS classes:
+
+    .. sourcecode:: css
+
+        td .code .kw { font-weight: bold; color: #00FF00 }
+        td .code .cm { color: #999999 }
+        ...
+
+    If you have Pygments 0.6 or higher, you can also pass a list or tuple to the
+    `get_style_defs()` method to request multiple prefixes for the tokens:
+
+    .. sourcecode:: python
+
+        formatter.get_style_defs(['div.syntax pre', 'pre.syntax'])
+
+    The output would then look like this:
+
+    .. sourcecode:: css
+
+        div.syntax pre .kw,
+        pre.syntax .kw { font-weight: bold; color: #00FF00 }
+        div.syntax pre .cm,
+        pre.syntax .cm { color: #999999 }
+        ...
+
+    Additional options accepted:
+
+    `nowrap`
+        If set to ``True``, don't wrap the tokens at all, not even inside a ``<pre>``
+        tag. This disables most other options (default: ``False``).
+
+    `full`
+        Tells the formatter to output a "full" document, i.e. a complete
+        self-contained document (default: ``False``).
+
+    `title`
+        If `full` is true, the title that should be used to caption the
+        document (default: ``''``).
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``). This option has no effect if the `cssfile`
+        and `noclobber_cssfile` option are given and the file specified in
+        `cssfile` exists.
+
+    `noclasses`
+        If set to true, token ``<span>`` tags (as well as line number elements)
+        will not use CSS classes, but inline styles. This is not recommended
+        for larger pieces of code since it increases output size by quite a bit
+        (default: ``False``).
+
+    `classprefix`
+        Since the token types use relatively short class names, they may clash
+        with some of your own class names. In this case you can use the
+        `classprefix` option to give a string to prepend to all Pygments-generated
+        CSS class names for token types.
+        Note that this option also affects the output of `get_style_defs()`.
+
+    `cssclass`
+        CSS class for the wrapping ``<div>`` tag (default: ``'highlight'``).
+        If you set this option, the default selector for `get_style_defs()`
+        will be this class.
+
+        .. versionadded:: 0.9
+           If you select the ``'table'`` line numbers, the wrapping table will
+           have a CSS class of this string plus ``'table'``, the default is
+           accordingly ``'highlighttable'``.
+
+    `cssstyles`
+        Inline CSS styles for the wrapping ``<div>`` tag (default: ``''``).
+
+    `prestyles`
+        Inline CSS styles for the ``<pre>`` tag (default: ``''``).
+
+        .. versionadded:: 0.11
+
+    `cssfile`
+        If the `full` option is true and this option is given, it must be the
+        name of an external file. If the filename does not include an absolute
+        path, the file's path will be assumed to be relative to the main output
+        file's path, if the latter can be found. The stylesheet is then written
+        to this file instead of the HTML file.
+
+        .. versionadded:: 0.6
+
+    `noclobber_cssfile`
+        If `cssfile` is given and the specified file exists, the css file will
+        not be overwritten. This allows the use of the `full` option in
+        combination with a user specified css file. Default is ``False``.
+
+        .. versionadded:: 1.1
+
+    `linenos`
+        If set to ``'table'``, output line numbers as a table with two cells,
+        one containing the line numbers, the other the whole code.  This is
+        copy-and-paste-friendly, but may cause alignment problems with some
+        browsers or fonts.  If set to ``'inline'``, the line numbers will be
+        integrated in the ``<pre>`` tag that contains the code (that setting
+        is *new in Pygments 0.8*).
+
+        For compatibility with Pygments 0.7 and earlier, every true value
+        except ``'inline'`` means the same as ``'table'`` (in particular, that
+        means also ``True``).
+
+        The default value is ``False``, which means no line numbers at all.
+
+        **Note:** with the default ("table") line number mechanism, the line
+        numbers and code can have different line heights in Internet Explorer
+        unless you give the enclosing ``<pre>`` tags an explicit ``line-height``
+        CSS property (you get the default line spacing with ``line-height:
+        125%``).
+
+    `hl_lines`
+        Specify a list of lines to be highlighted. The line numbers are always
+        relative to the input (i.e. the first line is line 1) and are
+        independent of `linenostart`.
+
+        .. versionadded:: 0.11
+
+    `linenostart`
+        The line number for the first line (default: ``1``).
+
+    `linenostep`
+        If set to a number n > 1, only every nth line number is printed.
+
+    `linenospecial`
+        If set to a number n > 0, every nth line number is given the CSS
+        class ``"special"`` (default: ``0``).
+
+    `nobackground`
+        If set to ``True``, the formatter won't output the background color
+        for the wrapping element (this automatically defaults to ``False``
+        when there is no wrapping element [eg: no argument for the
+        `get_syntax_defs` method given]) (default: ``False``).
+
+        .. versionadded:: 0.6
+
+    `lineseparator`
+        This string is output between lines of code. It defaults to ``"\n"``,
+        which is enough to break a line inside ``<pre>`` tags, but you can
+        e.g. set it to ``"<br>"`` to get HTML line breaks.
+
+        .. versionadded:: 0.7
+
+    `lineanchors`
+        If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
+        output line in an anchor tag with an ``id`` (and `name`) of ``foo-linenumber``.
+        This allows easy linking to certain lines.
+
+        .. versionadded:: 0.9
+
+    `linespans`
+        If set to a nonempty string, e.g. ``foo``, the formatter will wrap each
+        output line in a span tag with an ``id`` of ``foo-linenumber``.
+        This allows easy access to lines via javascript.
+
+        .. versionadded:: 1.6
+
+    `anchorlinenos`
+        If set to `True`, will wrap line numbers in <a> tags. Used in
+        combination with `linenos` and `lineanchors`.
+
+    `tagsfile`
+        If set to the path of a ctags file, wrap names in anchor tags that
+        link to their definitions. `lineanchors` should be used, and the
+        tags file should specify line numbers (see the `-n` option to ctags).
+
+        .. versionadded:: 1.6
+
+    `tagurlformat`
+        A string formatting pattern used to generate links to ctags definitions.
+        Available variables are `%(path)s`, `%(fname)s` and `%(fext)s`.
+        Defaults to an empty string, resulting in just `#prefix-number` links.
+
+        .. versionadded:: 1.6
+
+    `filename`
+        A string used to generate a filename when rendering ``<pre>`` blocks,
+        for example if displaying source code. If `linenos` is set to
+        ``'table'`` then the filename will be rendered in an initial row
+        containing a single `<th>` which spans both columns.
+
+        .. versionadded:: 2.1
+
+    `wrapcode`
+        Wrap the code inside ``<pre>`` blocks using ``<code>``, as recommended
+        by the HTML5 specification.
+
+        .. versionadded:: 2.4
+
+    `debug_token_types`
+        Add ``title`` attributes to all token ``<span>`` tags that show the
+        name of the token.
+
+        .. versionadded:: 2.10
+
+
+    **Subclassing the HTML formatter**
+
+    .. versionadded:: 0.7
+
+    The HTML formatter is now built in a way that allows easy subclassing, thus
+    customizing the output HTML code. The `format()` method calls
+    `self._format_lines()` which returns a generator that yields tuples of ``(1,
+    line)``, where the ``1`` indicates that the ``line`` is a line of the
+    formatted source code.
+
+    If the `nowrap` option is set, the generator is the iterated over and the
+    resulting HTML is output.
+
+    Otherwise, `format()` calls `self.wrap()`, which wraps the generator with
+    other generators. These may add some HTML code to the one generated by
+    `_format_lines()`, either by modifying the lines generated by the latter,
+    then yielding them again with ``(1, line)``, and/or by yielding other HTML
+    code before or after the lines, with ``(0, html)``. The distinction between
+    source lines and other code makes it possible to wrap the generator multiple
+    times.
+
+    The default `wrap()` implementation adds a ``<div>`` and a ``<pre>`` tag.
+
+    A custom `HtmlFormatter` subclass could look like this:
+
+    .. sourcecode:: python
+
+        class CodeHtmlFormatter(HtmlFormatter):
+
+            def wrap(self, source, *, include_div):
+                return self._wrap_code(source)
+
+            def _wrap_code(self, source):
+                yield 0, '<code>'
+                for i, t in source:
+                    if i == 1:
+                        # it's a line of formatted code
+                        t += '<br>'
+                    yield i, t
+                yield 0, '</code>'
+
+    This results in wrapping the formatted lines with a ``<code>`` tag, where the
+    source lines are broken using ``<br>`` tags.
+
+    After calling `wrap()`, the `format()` method also adds the "line numbers"
+    and/or "full document" wrappers if the respective options are set. Then, all
+    HTML yielded by the wrapped generator is output.
+    """
+
+    name = 'HTML'
+    aliases = ['html']
+    filenames = ['*.html', '*.htm']
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self.title = self._decodeifneeded(self.title)
+        self.nowrap = get_bool_opt(options, 'nowrap', False)
+        self.noclasses = get_bool_opt(options, 'noclasses', False)
+        self.classprefix = options.get('classprefix', '')
+        self.cssclass = self._decodeifneeded(options.get('cssclass', 'highlight'))
+        self.cssstyles = self._decodeifneeded(options.get('cssstyles', ''))
+        self.prestyles = self._decodeifneeded(options.get('prestyles', ''))
+        self.cssfile = self._decodeifneeded(options.get('cssfile', ''))
+        self.noclobber_cssfile = get_bool_opt(options, 'noclobber_cssfile', False)
+        self.tagsfile = self._decodeifneeded(options.get('tagsfile', ''))
+        self.tagurlformat = self._decodeifneeded(options.get('tagurlformat', ''))
+        self.filename = self._decodeifneeded(options.get('filename', ''))
+        self.wrapcode = get_bool_opt(options, 'wrapcode', False)
+        self.span_element_openers = {}
+        self.debug_token_types = get_bool_opt(options, 'debug_token_types', False)
+
+        if self.tagsfile:
+            if not ctags:
+                raise RuntimeError('The "ctags" package must to be installed '
+                                   'to be able to use the "tagsfile" feature.')
+            self._ctags = ctags.CTags(self.tagsfile)
+
+        linenos = options.get('linenos', False)
+        if linenos == 'inline':
+            self.linenos = 2
+        elif linenos:
+            # compatibility with <= 0.7
+            self.linenos = 1
+        else:
+            self.linenos = 0
+        self.linenostart = abs(get_int_opt(options, 'linenostart', 1))
+        self.linenostep = abs(get_int_opt(options, 'linenostep', 1))
+        self.linenospecial = abs(get_int_opt(options, 'linenospecial', 0))
+        self.nobackground = get_bool_opt(options, 'nobackground', False)
+        self.lineseparator = options.get('lineseparator', '\n')
+        self.lineanchors = options.get('lineanchors', '')
+        self.linespans = options.get('linespans', '')
+        self.anchorlinenos = get_bool_opt(options, 'anchorlinenos', False)
+        self.hl_lines = set()
+        for lineno in get_list_opt(options, 'hl_lines', []):
+            try:
+                self.hl_lines.add(int(lineno))
+            except ValueError:
+                pass
+
+        self._create_stylesheet()
+
+    def _get_css_class(self, ttype):
+        """Return the css class of this token type prefixed with
+        the classprefix option."""
+        ttypeclass = _get_ttype_class(ttype)
+        if ttypeclass:
+            return self.classprefix + ttypeclass
+        return ''
+
+    def _get_css_classes(self, ttype):
+        """Return the CSS classes of this token type prefixed with the classprefix option."""
+        cls = self._get_css_class(ttype)
+        while ttype not in STANDARD_TYPES:
+            ttype = ttype.parent
+            cls = self._get_css_class(ttype) + ' ' + cls
+        return cls or ''
+
+    def _get_css_inline_styles(self, ttype):
+        """Return the inline CSS styles for this token type."""
+        cclass = self.ttype2class.get(ttype)
+        while cclass is None:
+            ttype = ttype.parent
+            cclass = self.ttype2class.get(ttype)
+        return cclass or ''
+
+    def _create_stylesheet(self):
+        t2c = self.ttype2class = {Token: ''}
+        c2s = self.class2style = {}
+        for ttype, ndef in self.style:
+            name = self._get_css_class(ttype)
+            style = ''
+            if ndef['color']:
+                style += 'color: %s; ' % webify(ndef['color'])
+            if ndef['bold']:
+                style += 'font-weight: bold; '
+            if ndef['italic']:
+                style += 'font-style: italic; '
+            if ndef['underline']:
+                style += 'text-decoration: underline; '
+            if ndef['bgcolor']:
+                style += 'background-color: %s; ' % webify(ndef['bgcolor'])
+            if ndef['border']:
+                style += 'border: 1px solid %s; ' % webify(ndef['border'])
+            if style:
+                t2c[ttype] = name
+                # save len(ttype) to enable ordering the styles by
+                # hierarchy (necessary for CSS cascading rules!)
+                c2s[name] = (style[:-2], ttype, len(ttype))
+
+    def get_style_defs(self, arg=None):
+        """
+        Return CSS style definitions for the classes produced by the current
+        highlighting style. ``arg`` can be a string or list of selectors to
+        insert before the token type classes.
+        """
+        style_lines = []
+
+        style_lines.extend(self.get_linenos_style_defs())
+        style_lines.extend(self.get_background_style_defs(arg))
+        style_lines.extend(self.get_token_style_defs(arg))
+
+        return '\n'.join(style_lines)
+
+    def get_token_style_defs(self, arg=None):
+        prefix = self.get_css_prefix(arg)
+
+        styles = [
+            (level, ttype, cls, style)
+            for cls, (style, ttype, level) in self.class2style.items()
+            if cls and style
+        ]
+        styles.sort()
+
+        lines = [
+            '%s { %s } /* %s */' % (prefix(cls), style, repr(ttype)[6:])
+            for (level, ttype, cls, style) in styles
+        ]
+
+        return lines
+
+    def get_background_style_defs(self, arg=None):
+        prefix = self.get_css_prefix(arg)
+        bg_color = self.style.background_color
+        hl_color = self.style.highlight_color
+
+        lines = []
+
+        if arg and not self.nobackground and bg_color is not None:
+            text_style = ''
+            if Text in self.ttype2class:
+                text_style = ' ' + self.class2style[self.ttype2class[Text]][0]
+            lines.insert(
+                0, '%s{ background: %s;%s }' % (
+                    prefix(''), bg_color, text_style
+                )
+            )
+        if hl_color is not None:
+            lines.insert(
+                0, '%s { background-color: %s }' % (prefix('hll'), hl_color)
+            )
+
+        return lines
+
+    def get_linenos_style_defs(self):
+        lines = [
+            'pre { %s }' % self._pre_style,
+            'td.linenos .normal { %s }' % self._linenos_style,
+            'span.linenos { %s }' % self._linenos_style,
+            'td.linenos .special { %s }' % self._linenos_special_style,
+            'span.linenos.special { %s }' % self._linenos_special_style,
+        ]
+
+        return lines
+
+    def get_css_prefix(self, arg):
+        if arg is None:
+            arg = ('cssclass' in self.options and '.'+self.cssclass or '')
+        if isinstance(arg, str):
+            args = [arg]
+        else:
+            args = list(arg)
+
+        def prefix(cls):
+            if cls:
+                cls = '.' + cls
+            tmp = []
+            for arg in args:
+                tmp.append((arg and arg + ' ' or '') + cls)
+            return ', '.join(tmp)
+
+        return prefix
+
+    @property
+    def _pre_style(self):
+        return 'line-height: 125%;'
+
+    @property
+    def _linenos_style(self):
+        return 'color: %s; background-color: %s; padding-left: 5px; padding-right: 5px;' % (
+            self.style.line_number_color,
+            self.style.line_number_background_color
+        )
+
+    @property
+    def _linenos_special_style(self):
+        return 'color: %s; background-color: %s; padding-left: 5px; padding-right: 5px;' % (
+            self.style.line_number_special_color,
+            self.style.line_number_special_background_color
+        )
+
+    def _decodeifneeded(self, value):
+        if isinstance(value, bytes):
+            if self.encoding:
+                return value.decode(self.encoding)
+            return value.decode()
+        return value
+
+    def _wrap_full(self, inner, outfile):
+        if self.cssfile:
+            if os.path.isabs(self.cssfile):
+                # it's an absolute filename
+                cssfilename = self.cssfile
+            else:
+                try:
+                    filename = outfile.name
+                    if not filename or filename[0] == '<':
+                        # pseudo files, e.g. name == '<fdopen>'
+                        raise AttributeError
+                    cssfilename = os.path.join(os.path.dirname(filename),
+                                               self.cssfile)
+                except AttributeError:
+                    print('Note: Cannot determine output file name, '
+                          'using current directory as base for the CSS file name',
+                          file=sys.stderr)
+                    cssfilename = self.cssfile
+            # write CSS file only if noclobber_cssfile isn't given as an option.
+            try:
+                if not os.path.exists(cssfilename) or not self.noclobber_cssfile:
+                    with open(cssfilename, "w") as cf:
+                        cf.write(CSSFILE_TEMPLATE %
+                                 {'styledefs': self.get_style_defs('body')})
+            except OSError as err:
+                err.strerror = 'Error writing CSS file: ' + err.strerror
+                raise
+
+            yield 0, (DOC_HEADER_EXTERNALCSS %
+                      dict(title=self.title,
+                           cssfile=self.cssfile,
+                           encoding=self.encoding))
+        else:
+            yield 0, (DOC_HEADER %
+                      dict(title=self.title,
+                           styledefs=self.get_style_defs('body'),
+                           encoding=self.encoding))
+
+        yield from inner
+        yield 0, DOC_FOOTER
+
+    def _wrap_tablelinenos(self, inner):
+        dummyoutfile = StringIO()
+        lncount = 0
+        for t, line in inner:
+            if t:
+                lncount += 1
+            dummyoutfile.write(line)
+
+        fl = self.linenostart
+        mw = len(str(lncount + fl - 1))
+        sp = self.linenospecial
+        st = self.linenostep
+        anchor_name = self.lineanchors or self.linespans
+        aln = self.anchorlinenos
+        nocls = self.noclasses
+
+        lines = []
+
+        for i in range(fl, fl+lncount):
+            print_line = i % st == 0
+            special_line = sp and i % sp == 0
+
+            if print_line:
+                line = '%*d' % (mw, i)
+                if aln:
+                    line = '<a href="#%s-%d">%s</a>' % (anchor_name, i, line)
+            else:
+                line = ' ' * mw
+
+            if nocls:
+                if special_line:
+                    style = ' style="%s"' % self._linenos_special_style
+                else:
+                    style = ' style="%s"' % self._linenos_style
+            else:
+                if special_line:
+                    style = ' class="special"'
+                else:
+                    style = ' class="normal"'
+
+            if style:
+                line = '<span%s>%s</span>' % (style, line)
+
+            lines.append(line)
+
+        ls = '\n'.join(lines)
+
+        # If a filename was specified, we can't put it into the code table as it
+        # would misalign the line numbers. Hence we emit a separate row for it.
+        filename_tr = ""
+        if self.filename:
+            filename_tr = (
+                '<tr><th colspan="2" class="filename">'
+                '<span class="filename">' + self.filename + '</span>'
+                '</th></tr>')
+
+        # in case you wonder about the seemingly redundant <div> here: since the
+        # content in the other cell also is wrapped in a div, some browsers in
+        # some configurations seem to mess up the formatting...
+        yield 0, (f'<table class="{self.cssclass}table">' + filename_tr +
+            '<tr><td class="linenos"><div class="linenodiv"><pre>' +
+            ls + '</pre></div></td><td class="code">')
+        yield 0, '<div>'
+        yield 0, dummyoutfile.getvalue()
+        yield 0, '</div>'
+        yield 0, '</td></tr></table>'
+        
+
+    def _wrap_inlinelinenos(self, inner):
+        # need a list of lines since we need the width of a single number :(
+        inner_lines = list(inner)
+        sp = self.linenospecial
+        st = self.linenostep
+        num = self.linenostart
+        mw = len(str(len(inner_lines) + num - 1))
+        anchor_name = self.lineanchors or self.linespans
+        aln = self.anchorlinenos
+        nocls = self.noclasses
+
+        for _, inner_line in inner_lines:
+            print_line = num % st == 0
+            special_line = sp and num % sp == 0
+
+            if print_line:
+                line = '%*d' % (mw, num)
+            else:
+                line = ' ' * mw
+
+            if nocls:
+                if special_line:
+                    style = ' style="%s"' % self._linenos_special_style
+                else:
+                    style = ' style="%s"' % self._linenos_style
+            else:
+                if special_line:
+                    style = ' class="linenos special"'
+                else:
+                    style = ' class="linenos"'
+
+            if style:
+                linenos = '<span%s>%s</span>' % (style, line)
+            else:
+                linenos = line
+
+            if aln:
+                yield 1, ('<a href="#%s-%d">%s</a>' % (anchor_name, num, linenos) +
+                          inner_line)
+            else:
+                yield 1, linenos + inner_line
+            num += 1
+
+    def _wrap_lineanchors(self, inner):
+        s = self.lineanchors
+        # subtract 1 since we have to increment i *before* yielding
+        i = self.linenostart - 1
+        for t, line in inner:
+            if t:
+                i += 1
+                href = "" if self.linenos else ' href="#%s-%d"' % (s, i)
+                yield 1, '<a id="%s-%d" name="%s-%d"%s></a>' % (s, i, s, i, href) + line
+            else:
+                yield 0, line
+
+    def _wrap_linespans(self, inner):
+        s = self.linespans
+        i = self.linenostart - 1
+        for t, line in inner:
+            if t:
+                i += 1
+                yield 1, '<span id="%s-%d">%s</span>' % (s, i, line)
+            else:
+                yield 0, line
+
+    def _wrap_div(self, inner):
+        style = []
+        if (self.noclasses and not self.nobackground and
+                self.style.background_color is not None):
+            style.append('background: %s' % (self.style.background_color,))
+        if self.cssstyles:
+            style.append(self.cssstyles)
+        style = '; '.join(style)
+
+        yield 0, ('<div' + (self.cssclass and ' class="%s"' % self.cssclass) +
+                  (style and (' style="%s"' % style)) + '>')
+        yield from inner
+        yield 0, '</div>\n'
+
+    def _wrap_pre(self, inner):
+        style = []
+        if self.prestyles:
+            style.append(self.prestyles)
+        if self.noclasses:
+            style.append(self._pre_style)
+        style = '; '.join(style)
+
+        if self.filename and self.linenos != 1:
+            yield 0, ('<span class="filename">' + self.filename + '</span>')
+
+        # the empty span here is to keep leading empty lines from being
+        # ignored by HTML parsers
+        yield 0, ('<pre' + (style and ' style="%s"' % style) + '><span></span>')
+        yield from inner
+        yield 0, '</pre>'
+
+    def _wrap_code(self, inner):
+        yield 0, '<code>'
+        yield from inner
+        yield 0, '</code>'
+
+    @functools.lru_cache(maxsize=100)
+    def _translate_parts(self, value):
+        """HTML-escape a value and split it by newlines."""
+        return value.translate(_escape_html_table).split('\n')
+
+    def _format_lines(self, tokensource):
+        """
+        Just format the tokens, without any wrapping tags.
+        Yield individual lines.
+        """
+        nocls = self.noclasses
+        lsep = self.lineseparator
+        tagsfile = self.tagsfile
+
+        lspan = ''
+        line = []
+        for ttype, value in tokensource:
+            try:
+                cspan = self.span_element_openers[ttype]
+            except KeyError:
+                title = ' title="%s"' % '.'.join(ttype) if self.debug_token_types else ''
+                if nocls:
+                    css_style = self._get_css_inline_styles(ttype)
+                    if css_style:
+                        css_style = self.class2style[css_style][0]
+                        cspan = '<span style="%s"%s>' % (css_style, title)
+                    else:
+                        cspan = ''
+                else:
+                    css_class = self._get_css_classes(ttype)
+                    if css_class:
+                        cspan = '<span class="%s"%s>' % (css_class, title)
+                    else:
+                        cspan = ''
+                self.span_element_openers[ttype] = cspan
+
+            parts = self._translate_parts(value)
+
+            if tagsfile and ttype in Token.Name:
+                filename, linenumber = self._lookup_ctag(value)
+                if linenumber:
+                    base, filename = os.path.split(filename)
+                    if base:
+                        base += '/'
+                    filename, extension = os.path.splitext(filename)
+                    url = self.tagurlformat % {'path': base, 'fname': filename,
+                                               'fext': extension}
+                    parts[0] = "<a href=\"%s#%s-%d\">%s" % \
+                        (url, self.lineanchors, linenumber, parts[0])
+                    parts[-1] = parts[-1] + "</a>"
+
+            # for all but the last line
+            for part in parts[:-1]:
+                if line:
+                    if lspan != cspan:
+                        line.extend(((lspan and '</span>'), cspan, part,
+                                     (cspan and '</span>'), lsep))
+                    else:  # both are the same
+                        line.extend((part, (lspan and '</span>'), lsep))
+                    yield 1, ''.join(line)
+                    line = []
+                elif part:
+                    yield 1, ''.join((cspan, part, (cspan and '</span>'), lsep))
+                else:
+                    yield 1, lsep
+            # for the last line
+            if line and parts[-1]:
+                if lspan != cspan:
+                    line.extend(((lspan and '</span>'), cspan, parts[-1]))
+                    lspan = cspan
+                else:
+                    line.append(parts[-1])
+            elif parts[-1]:
+                line = [cspan, parts[-1]]
+                lspan = cspan
+            # else we neither have to open a new span nor set lspan
+
+        if line:
+            line.extend(((lspan and '</span>'), lsep))
+            yield 1, ''.join(line)
+
+    def _lookup_ctag(self, token):
+        entry = ctags.TagEntry()
+        if self._ctags.find(entry, token.encode(), 0):
+            return entry['file'], entry['lineNumber']
+        else:
+            return None, None
+
+    def _highlight_lines(self, tokensource):
+        """
+        Highlighted the lines specified in the `hl_lines` option by
+        post-processing the token stream coming from `_format_lines`.
+        """
+        hls = self.hl_lines
+
+        for i, (t, value) in enumerate(tokensource):
+            if t != 1:
+                yield t, value
+            if i + 1 in hls:  # i + 1 because Python indexes start at 0
+                if self.noclasses:
+                    style = ''
+                    if self.style.highlight_color is not None:
+                        style = (' style="background-color: %s"' %
+                                 (self.style.highlight_color,))
+                    yield 1, '<span%s>%s</span>' % (style, value)
+                else:
+                    yield 1, '<span class="hll">%s</span>' % value
+            else:
+                yield 1, value
+
+    def wrap(self, source):
+        """
+        Wrap the ``source``, which is a generator yielding
+        individual lines, in custom generators. See docstring
+        for `format`. Can be overridden.
+        """
+
+        output = source
+        if self.wrapcode:
+            output = self._wrap_code(output)
+        
+        output = self._wrap_pre(output)
+    
+        return output
+
+    def format_unencoded(self, tokensource, outfile):
+        """
+        The formatting process uses several nested generators; which of
+        them are used is determined by the user's options.
+
+        Each generator should take at least one argument, ``inner``,
+        and wrap the pieces of text generated by this.
+
+        Always yield 2-tuples: (code, text). If "code" is 1, the text
+        is part of the original tokensource being highlighted, if it's
+        0, the text is some piece of wrapping. This makes it possible to
+        use several different wrappers that process the original source
+        linewise, e.g. line number generators.
+        """
+        source = self._format_lines(tokensource)
+
+        # As a special case, we wrap line numbers before line highlighting
+        # so the line numbers get wrapped in the highlighting tag.
+        if not self.nowrap and self.linenos == 2:
+            source = self._wrap_inlinelinenos(source)
+
+        if self.hl_lines:
+            source = self._highlight_lines(source)
+
+        if not self.nowrap:
+            if self.lineanchors:
+                source = self._wrap_lineanchors(source)
+            if self.linespans:
+                source = self._wrap_linespans(source)
+            source = self.wrap(source)
+            if self.linenos == 1:
+                source = self._wrap_tablelinenos(source)
+            source = self._wrap_div(source)
+            if self.full:
+                source = self._wrap_full(source, outfile)
+
+        for t, piece in source:
+            outfile.write(piece)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/img.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/img.py
new file mode 100644
index 0000000..0f36a32
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/img.py
@@ -0,0 +1,645 @@
+"""
+    pygments.formatters.img
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for Pixmap output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import os
+import sys
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt, get_list_opt, \
+    get_choice_opt
+
+import subprocess
+
+# Import this carefully
+try:
+    from PIL import Image, ImageDraw, ImageFont
+    pil_available = True
+except ImportError:
+    pil_available = False
+
+try:
+    import _winreg
+except ImportError:
+    try:
+        import winreg as _winreg
+    except ImportError:
+        _winreg = None
+
+__all__ = ['ImageFormatter', 'GifImageFormatter', 'JpgImageFormatter',
+           'BmpImageFormatter']
+
+
+# For some unknown reason every font calls it something different
+STYLES = {
+    'NORMAL':     ['', 'Roman', 'Book', 'Normal', 'Regular', 'Medium'],
+    'ITALIC':     ['Oblique', 'Italic'],
+    'BOLD':       ['Bold'],
+    'BOLDITALIC': ['Bold Oblique', 'Bold Italic'],
+}
+
+# A sane default for modern systems
+DEFAULT_FONT_NAME_NIX = 'DejaVu Sans Mono'
+DEFAULT_FONT_NAME_WIN = 'Courier New'
+DEFAULT_FONT_NAME_MAC = 'Menlo'
+
+
+class PilNotAvailable(ImportError):
+    """When Python imaging library is not available"""
+
+
+class FontNotFound(Exception):
+    """When there are no usable fonts specified"""
+
+
+class FontManager:
+    """
+    Manages a set of fonts: normal, italic, bold, etc...
+    """
+
+    def __init__(self, font_name, font_size=14):
+        self.font_name = font_name
+        self.font_size = font_size
+        self.fonts = {}
+        self.encoding = None
+        if sys.platform.startswith('win'):
+            if not font_name:
+                self.font_name = DEFAULT_FONT_NAME_WIN
+            self._create_win()
+        elif sys.platform.startswith('darwin'):
+            if not font_name:
+                self.font_name = DEFAULT_FONT_NAME_MAC
+            self._create_mac()
+        else:
+            if not font_name:
+                self.font_name = DEFAULT_FONT_NAME_NIX
+            self._create_nix()
+
+    def _get_nix_font_path(self, name, style):
+        proc = subprocess.Popen(['fc-list', "%s:style=%s" % (name, style), 'file'],
+                                stdout=subprocess.PIPE, stderr=None)
+        stdout, _ = proc.communicate()
+        if proc.returncode == 0:
+            lines = stdout.splitlines()
+            for line in lines:
+                if line.startswith(b'Fontconfig warning:'):
+                    continue
+                path = line.decode().strip().strip(':')
+                if path:
+                    return path
+            return None
+
+    def _create_nix(self):
+        for name in STYLES['NORMAL']:
+            path = self._get_nix_font_path(self.font_name, name)
+            if path is not None:
+                self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
+                break
+        else:
+            raise FontNotFound('No usable fonts named: "%s"' %
+                               self.font_name)
+        for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
+            for stylename in STYLES[style]:
+                path = self._get_nix_font_path(self.font_name, stylename)
+                if path is not None:
+                    self.fonts[style] = ImageFont.truetype(path, self.font_size)
+                    break
+            else:
+                if style == 'BOLDITALIC':
+                    self.fonts[style] = self.fonts['BOLD']
+                else:
+                    self.fonts[style] = self.fonts['NORMAL']
+
+    def _get_mac_font_path(self, font_map, name, style):
+        return font_map.get((name + ' ' + style).strip().lower())
+
+    def _create_mac(self):
+        font_map = {}
+        for font_dir in (os.path.join(os.getenv("HOME"), 'Library/Fonts/'),
+                         '/Library/Fonts/', '/System/Library/Fonts/'):
+            font_map.update(
+                (os.path.splitext(f)[0].lower(), os.path.join(font_dir, f))
+                for f in os.listdir(font_dir)
+                if f.lower().endswith(('ttf', 'ttc')))
+
+        for name in STYLES['NORMAL']:
+            path = self._get_mac_font_path(font_map, self.font_name, name)
+            if path is not None:
+                self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
+                break
+        else:
+            raise FontNotFound('No usable fonts named: "%s"' %
+                               self.font_name)
+        for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
+            for stylename in STYLES[style]:
+                path = self._get_mac_font_path(font_map, self.font_name, stylename)
+                if path is not None:
+                    self.fonts[style] = ImageFont.truetype(path, self.font_size)
+                    break
+            else:
+                if style == 'BOLDITALIC':
+                    self.fonts[style] = self.fonts['BOLD']
+                else:
+                    self.fonts[style] = self.fonts['NORMAL']
+
+    def _lookup_win(self, key, basename, styles, fail=False):
+        for suffix in ('', ' (TrueType)'):
+            for style in styles:
+                try:
+                    valname = '%s%s%s' % (basename, style and ' '+style, suffix)
+                    val, _ = _winreg.QueryValueEx(key, valname)
+                    return val
+                except OSError:
+                    continue
+        else:
+            if fail:
+                raise FontNotFound('Font %s (%s) not found in registry' %
+                                   (basename, styles[0]))
+            return None
+
+    def _create_win(self):
+        lookuperror = None
+        keynames = [ (_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
+                     (_winreg.HKEY_CURRENT_USER, r'Software\Microsoft\Windows\CurrentVersion\Fonts'),
+                     (_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows NT\CurrentVersion\Fonts'),
+                     (_winreg.HKEY_LOCAL_MACHINE, r'Software\Microsoft\Windows\CurrentVersion\Fonts') ]
+        for keyname in keynames:
+            try:
+                key = _winreg.OpenKey(*keyname)
+                try:
+                    path = self._lookup_win(key, self.font_name, STYLES['NORMAL'], True)
+                    self.fonts['NORMAL'] = ImageFont.truetype(path, self.font_size)
+                    for style in ('ITALIC', 'BOLD', 'BOLDITALIC'):
+                        path = self._lookup_win(key, self.font_name, STYLES[style])
+                        if path:
+                            self.fonts[style] = ImageFont.truetype(path, self.font_size)
+                        else:
+                            if style == 'BOLDITALIC':
+                                self.fonts[style] = self.fonts['BOLD']
+                            else:
+                                self.fonts[style] = self.fonts['NORMAL']
+                    return
+                except FontNotFound as err:
+                    lookuperror = err
+                finally:
+                    _winreg.CloseKey(key)
+            except OSError:
+                pass
+        else:
+            # If we get here, we checked all registry keys and had no luck
+            # We can be in one of two situations now:
+            # * All key lookups failed. In this case lookuperror is None and we
+            #   will raise a generic error
+            # * At least one lookup failed with a FontNotFound error. In this
+            #   case, we will raise that as a more specific error
+            if lookuperror:
+                raise lookuperror
+            raise FontNotFound('Can\'t open Windows font registry key')
+
+    def get_char_size(self):
+        """
+        Get the character size.
+        """
+        return self.get_text_size('M')
+
+    def get_text_size(self, text):
+        """
+        Get the text size (width, height).
+        """
+        font = self.fonts['NORMAL']
+        if hasattr(font, 'getbbox'):  # Pillow >= 9.2.0
+            return font.getbbox(text)[2:4]
+        else:
+            return font.getsize(text)
+
+    def get_font(self, bold, oblique):
+        """
+        Get the font based on bold and italic flags.
+        """
+        if bold and oblique:
+            return self.fonts['BOLDITALIC']
+        elif bold:
+            return self.fonts['BOLD']
+        elif oblique:
+            return self.fonts['ITALIC']
+        else:
+            return self.fonts['NORMAL']
+
+
+class ImageFormatter(Formatter):
+    """
+    Create a PNG image from source code. This uses the Python Imaging Library to
+    generate a pixmap from the source code.
+
+    .. versionadded:: 0.10
+
+    Additional options accepted:
+
+    `image_format`
+        An image format to output to that is recognised by PIL, these include:
+
+        * "PNG" (default)
+        * "JPEG"
+        * "BMP"
+        * "GIF"
+
+    `line_pad`
+        The extra spacing (in pixels) between each line of text.
+
+        Default: 2
+
+    `font_name`
+        The font name to be used as the base font from which others, such as
+        bold and italic fonts will be generated.  This really should be a
+        monospace font to look sane.
+
+        Default: "Courier New" on Windows, "Menlo" on Mac OS, and
+                 "DejaVu Sans Mono" on \\*nix
+
+    `font_size`
+        The font size in points to be used.
+
+        Default: 14
+
+    `image_pad`
+        The padding, in pixels to be used at each edge of the resulting image.
+
+        Default: 10
+
+    `line_numbers`
+        Whether line numbers should be shown: True/False
+
+        Default: True
+
+    `line_number_start`
+        The line number of the first line.
+
+        Default: 1
+
+    `line_number_step`
+        The step used when printing line numbers.
+
+        Default: 1
+
+    `line_number_bg`
+        The background colour (in "#123456" format) of the line number bar, or
+        None to use the style background color.
+
+        Default: "#eed"
+
+    `line_number_fg`
+        The text color of the line numbers (in "#123456"-like format).
+
+        Default: "#886"
+
+    `line_number_chars`
+        The number of columns of line numbers allowable in the line number
+        margin.
+
+        Default: 2
+
+    `line_number_bold`
+        Whether line numbers will be bold: True/False
+
+        Default: False
+
+    `line_number_italic`
+        Whether line numbers will be italicized: True/False
+
+        Default: False
+
+    `line_number_separator`
+        Whether a line will be drawn between the line number area and the
+        source code area: True/False
+
+        Default: True
+
+    `line_number_pad`
+        The horizontal padding (in pixels) between the line number margin, and
+        the source code area.
+
+        Default: 6
+
+    `hl_lines`
+        Specify a list of lines to be highlighted.
+
+        .. versionadded:: 1.2
+
+        Default: empty list
+
+    `hl_color`
+        Specify the color for highlighting lines.
+
+        .. versionadded:: 1.2
+
+        Default: highlight color of the selected style
+    """
+
+    # Required by the pygments mapper
+    name = 'img'
+    aliases = ['img', 'IMG', 'png']
+    filenames = ['*.png']
+
+    unicodeoutput = False
+
+    default_image_format = 'png'
+
+    def __init__(self, **options):
+        """
+        See the class docstring for explanation of options.
+        """
+        if not pil_available:
+            raise PilNotAvailable(
+                'Python Imaging Library is required for this formatter')
+        Formatter.__init__(self, **options)
+        self.encoding = 'latin1'  # let pygments.format() do the right thing
+        # Read the style
+        self.styles = dict(self.style)
+        if self.style.background_color is None:
+            self.background_color = '#fff'
+        else:
+            self.background_color = self.style.background_color
+        # Image options
+        self.image_format = get_choice_opt(
+            options, 'image_format', ['png', 'jpeg', 'gif', 'bmp'],
+            self.default_image_format, normcase=True)
+        self.image_pad = get_int_opt(options, 'image_pad', 10)
+        self.line_pad = get_int_opt(options, 'line_pad', 2)
+        # The fonts
+        fontsize = get_int_opt(options, 'font_size', 14)
+        self.fonts = FontManager(options.get('font_name', ''), fontsize)
+        self.fontw, self.fonth = self.fonts.get_char_size()
+        # Line number options
+        self.line_number_fg = options.get('line_number_fg', '#886')
+        self.line_number_bg = options.get('line_number_bg', '#eed')
+        self.line_number_chars = get_int_opt(options,
+                                             'line_number_chars', 2)
+        self.line_number_bold = get_bool_opt(options,
+                                             'line_number_bold', False)
+        self.line_number_italic = get_bool_opt(options,
+                                               'line_number_italic', False)
+        self.line_number_pad = get_int_opt(options, 'line_number_pad', 6)
+        self.line_numbers = get_bool_opt(options, 'line_numbers', True)
+        self.line_number_separator = get_bool_opt(options,
+                                                  'line_number_separator', True)
+        self.line_number_step = get_int_opt(options, 'line_number_step', 1)
+        self.line_number_start = get_int_opt(options, 'line_number_start', 1)
+        if self.line_numbers:
+            self.line_number_width = (self.fontw * self.line_number_chars +
+                                      self.line_number_pad * 2)
+        else:
+            self.line_number_width = 0
+        self.hl_lines = []
+        hl_lines_str = get_list_opt(options, 'hl_lines', [])
+        for line in hl_lines_str:
+            try:
+                self.hl_lines.append(int(line))
+            except ValueError:
+                pass
+        self.hl_color = options.get('hl_color',
+                                    self.style.highlight_color) or '#f90'
+        self.drawables = []
+
+    def get_style_defs(self, arg=''):
+        raise NotImplementedError('The -S option is meaningless for the image '
+                                  'formatter. Use -O style=<stylename> instead.')
+
+    def _get_line_height(self):
+        """
+        Get the height of a line.
+        """
+        return self.fonth + self.line_pad
+
+    def _get_line_y(self, lineno):
+        """
+        Get the Y coordinate of a line number.
+        """
+        return lineno * self._get_line_height() + self.image_pad
+
+    def _get_char_width(self):
+        """
+        Get the width of a character.
+        """
+        return self.fontw
+
+    def _get_char_x(self, linelength):
+        """
+        Get the X coordinate of a character position.
+        """
+        return linelength + self.image_pad + self.line_number_width
+
+    def _get_text_pos(self, linelength, lineno):
+        """
+        Get the actual position for a character and line position.
+        """
+        return self._get_char_x(linelength), self._get_line_y(lineno)
+
+    def _get_linenumber_pos(self, lineno):
+        """
+        Get the actual position for the start of a line number.
+        """
+        return (self.image_pad, self._get_line_y(lineno))
+
+    def _get_text_color(self, style):
+        """
+        Get the correct color for the token from the style.
+        """
+        if style['color'] is not None:
+            fill = '#' + style['color']
+        else:
+            fill = '#000'
+        return fill
+
+    def _get_text_bg_color(self, style):
+        """
+        Get the correct background color for the token from the style.
+        """
+        if style['bgcolor'] is not None:
+            bg_color = '#' + style['bgcolor']
+        else:
+            bg_color = None
+        return bg_color
+
+    def _get_style_font(self, style):
+        """
+        Get the correct font for the style.
+        """
+        return self.fonts.get_font(style['bold'], style['italic'])
+
+    def _get_image_size(self, maxlinelength, maxlineno):
+        """
+        Get the required image size.
+        """
+        return (self._get_char_x(maxlinelength) + self.image_pad,
+                self._get_line_y(maxlineno + 0) + self.image_pad)
+
+    def _draw_linenumber(self, posno, lineno):
+        """
+        Remember a line number drawable to paint later.
+        """
+        self._draw_text(
+            self._get_linenumber_pos(posno),
+            str(lineno).rjust(self.line_number_chars),
+            font=self.fonts.get_font(self.line_number_bold,
+                                     self.line_number_italic),
+            text_fg=self.line_number_fg,
+            text_bg=None,
+        )
+
+    def _draw_text(self, pos, text, font, text_fg, text_bg):
+        """
+        Remember a single drawable tuple to paint later.
+        """
+        self.drawables.append((pos, text, font, text_fg, text_bg))
+
+    def _create_drawables(self, tokensource):
+        """
+        Create drawables for the token content.
+        """
+        lineno = charno = maxcharno = 0
+        maxlinelength = linelength = 0
+        for ttype, value in tokensource:
+            while ttype not in self.styles:
+                ttype = ttype.parent
+            style = self.styles[ttype]
+            # TODO: make sure tab expansion happens earlier in the chain.  It
+            # really ought to be done on the input, as to do it right here is
+            # quite complex.
+            value = value.expandtabs(4)
+            lines = value.splitlines(True)
+            # print lines
+            for i, line in enumerate(lines):
+                temp = line.rstrip('\n')
+                if temp:
+                    self._draw_text(
+                        self._get_text_pos(linelength, lineno),
+                        temp,
+                        font = self._get_style_font(style),
+                        text_fg = self._get_text_color(style),
+                        text_bg = self._get_text_bg_color(style),
+                    )
+                    temp_width, _ = self.fonts.get_text_size(temp)
+                    linelength += temp_width
+                    maxlinelength = max(maxlinelength, linelength)
+                    charno += len(temp)
+                    maxcharno = max(maxcharno, charno)
+                if line.endswith('\n'):
+                    # add a line for each extra line in the value
+                    linelength = 0
+                    charno = 0
+                    lineno += 1
+        self.maxlinelength = maxlinelength
+        self.maxcharno = maxcharno
+        self.maxlineno = lineno
+
+    def _draw_line_numbers(self):
+        """
+        Create drawables for the line numbers.
+        """
+        if not self.line_numbers:
+            return
+        for p in range(self.maxlineno):
+            n = p + self.line_number_start
+            if (n % self.line_number_step) == 0:
+                self._draw_linenumber(p, n)
+
+    def _paint_line_number_bg(self, im):
+        """
+        Paint the line number background on the image.
+        """
+        if not self.line_numbers:
+            return
+        if self.line_number_fg is None:
+            return
+        draw = ImageDraw.Draw(im)
+        recth = im.size[-1]
+        rectw = self.image_pad + self.line_number_width - self.line_number_pad
+        draw.rectangle([(0, 0), (rectw, recth)],
+                       fill=self.line_number_bg)
+        if self.line_number_separator:
+            draw.line([(rectw, 0), (rectw, recth)], fill=self.line_number_fg)
+        del draw
+
+    def format(self, tokensource, outfile):
+        """
+        Format ``tokensource``, an iterable of ``(tokentype, tokenstring)``
+        tuples and write it into ``outfile``.
+
+        This implementation calculates where it should draw each token on the
+        pixmap, then calculates the required pixmap size and draws the items.
+        """
+        self._create_drawables(tokensource)
+        self._draw_line_numbers()
+        im = Image.new(
+            'RGB',
+            self._get_image_size(self.maxlinelength, self.maxlineno),
+            self.background_color
+        )
+        self._paint_line_number_bg(im)
+        draw = ImageDraw.Draw(im)
+        # Highlight
+        if self.hl_lines:
+            x = self.image_pad + self.line_number_width - self.line_number_pad + 1
+            recth = self._get_line_height()
+            rectw = im.size[0] - x
+            for linenumber in self.hl_lines:
+                y = self._get_line_y(linenumber - 1)
+                draw.rectangle([(x, y), (x + rectw, y + recth)],
+                               fill=self.hl_color)
+        for pos, value, font, text_fg, text_bg in self.drawables:
+            if text_bg:
+                text_size = draw.textsize(text=value, font=font)
+                draw.rectangle([pos[0], pos[1], pos[0] + text_size[0], pos[1] + text_size[1]], fill=text_bg)
+            draw.text(pos, value, font=font, fill=text_fg)
+        im.save(outfile, self.image_format.upper())
+
+
+# Add one formatter per format, so that the "-f gif" option gives the correct result
+# when used in pygmentize.
+
+class GifImageFormatter(ImageFormatter):
+    """
+    Create a GIF image from source code. This uses the Python Imaging Library to
+    generate a pixmap from the source code.
+
+    .. versionadded:: 1.0
+    """
+
+    name = 'img_gif'
+    aliases = ['gif']
+    filenames = ['*.gif']
+    default_image_format = 'gif'
+
+
+class JpgImageFormatter(ImageFormatter):
+    """
+    Create a JPEG image from source code. This uses the Python Imaging Library to
+    generate a pixmap from the source code.
+
+    .. versionadded:: 1.0
+    """
+
+    name = 'img_jpg'
+    aliases = ['jpg', 'jpeg']
+    filenames = ['*.jpg']
+    default_image_format = 'jpeg'
+
+
+class BmpImageFormatter(ImageFormatter):
+    """
+    Create a bitmap image from source code. This uses the Python Imaging Library to
+    generate a pixmap from the source code.
+
+    .. versionadded:: 1.0
+    """
+
+    name = 'img_bmp'
+    aliases = ['bmp', 'bitmap']
+    filenames = ['*.bmp']
+    default_image_format = 'bmp'
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/irc.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/irc.py
new file mode 100644
index 0000000..3f6d52d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/irc.py
@@ -0,0 +1,179 @@
+"""
+    pygments.formatters.irc
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for IRC output
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.token import Keyword, Name, Comment, String, Error, \
+    Number, Operator, Generic, Token, Whitespace
+from pip._vendor.pygments.util import get_choice_opt
+
+
+__all__ = ['IRCFormatter']
+
+
+#: Map token types to a tuple of color values for light and dark
+#: backgrounds.
+IRC_COLORS = {
+    Token:              ('',            ''),
+
+    Whitespace:         ('gray',   'brightblack'),
+    Comment:            ('gray',   'brightblack'),
+    Comment.Preproc:    ('cyan',        'brightcyan'),
+    Keyword:            ('blue',    'brightblue'),
+    Keyword.Type:       ('cyan',        'brightcyan'),
+    Operator.Word:      ('magenta',      'brightcyan'),
+    Name.Builtin:       ('cyan',        'brightcyan'),
+    Name.Function:      ('green',   'brightgreen'),
+    Name.Namespace:     ('_cyan_',      '_brightcyan_'),
+    Name.Class:         ('_green_', '_brightgreen_'),
+    Name.Exception:     ('cyan',        'brightcyan'),
+    Name.Decorator:     ('brightblack',    'gray'),
+    Name.Variable:      ('red',     'brightred'),
+    Name.Constant:      ('red',     'brightred'),
+    Name.Attribute:     ('cyan',        'brightcyan'),
+    Name.Tag:           ('brightblue',        'brightblue'),
+    String:             ('yellow',       'yellow'),
+    Number:             ('blue',    'brightblue'),
+
+    Generic.Deleted:    ('brightred',        'brightred'),
+    Generic.Inserted:   ('green',  'brightgreen'),
+    Generic.Heading:    ('**',         '**'),
+    Generic.Subheading: ('*magenta*',   '*brightmagenta*'),
+    Generic.Error:      ('brightred',        'brightred'),
+
+    Error:              ('_brightred_',      '_brightred_'),
+}
+
+
+IRC_COLOR_MAP = {
+    'white': 0,
+    'black': 1,
+    'blue': 2,
+    'brightgreen': 3,
+    'brightred': 4,
+    'yellow': 5,
+    'magenta': 6,
+    'orange': 7,
+    'green': 7, #compat w/ ansi
+    'brightyellow': 8,
+    'lightgreen': 9,
+    'brightcyan': 9, # compat w/ ansi
+    'cyan': 10,
+    'lightblue': 11,
+    'red': 11, # compat w/ ansi
+    'brightblue': 12,
+    'brightmagenta': 13,
+    'brightblack': 14,
+    'gray': 15,
+}
+
+def ircformat(color, text):
+    if len(color) < 1:
+        return text
+    add = sub = ''
+    if '_' in color: # italic
+        add += '\x1D'
+        sub = '\x1D' + sub
+        color = color.strip('_')
+    if '*' in color: # bold
+        add += '\x02'
+        sub = '\x02' + sub
+        color = color.strip('*')
+    # underline (\x1F) not supported
+    # backgrounds (\x03FF,BB) not supported
+    if len(color) > 0: # actual color - may have issues with ircformat("red", "blah")+"10" type stuff
+        add += '\x03' + str(IRC_COLOR_MAP[color]).zfill(2)
+        sub = '\x03' + sub
+    return add + text + sub
+    return '<'+add+'>'+text+'</'+sub+'>'
+
+
+class IRCFormatter(Formatter):
+    r"""
+    Format tokens with IRC color sequences
+
+    The `get_style_defs()` method doesn't do anything special since there is
+    no support for common styles.
+
+    Options accepted:
+
+    `bg`
+        Set to ``"light"`` or ``"dark"`` depending on the terminal's background
+        (default: ``"light"``).
+
+    `colorscheme`
+        A dictionary mapping token types to (lightbg, darkbg) color names or
+        ``None`` (default: ``None`` = use builtin colorscheme).
+
+    `linenos`
+        Set to ``True`` to have line numbers in the output as well
+        (default: ``False`` = no line numbers).
+    """
+    name = 'IRC'
+    aliases = ['irc', 'IRC']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self.darkbg = get_choice_opt(options, 'bg',
+                                     ['light', 'dark'], 'light') == 'dark'
+        self.colorscheme = options.get('colorscheme', None) or IRC_COLORS
+        self.linenos = options.get('linenos', False)
+        self._lineno = 0
+
+    def _write_lineno(self, outfile):
+        self._lineno += 1
+        outfile.write("\n%04d: " % self._lineno)
+
+    def _format_unencoded_with_lineno(self, tokensource, outfile):
+        self._write_lineno(outfile)
+
+        for ttype, value in tokensource:
+            if value.endswith("\n"):
+                self._write_lineno(outfile)
+                value = value[:-1]
+            color = self.colorscheme.get(ttype)
+            while color is None:
+                ttype = ttype.parent
+                color = self.colorscheme.get(ttype)
+            if color:
+                color = color[self.darkbg]
+                spl = value.split('\n')
+                for line in spl[:-1]:
+                    self._write_lineno(outfile)
+                    if line:
+                        outfile.write(ircformat(color, line[:-1]))
+                if spl[-1]:
+                    outfile.write(ircformat(color, spl[-1]))
+            else:
+                outfile.write(value)
+
+        outfile.write("\n")
+
+    def format_unencoded(self, tokensource, outfile):
+        if self.linenos:
+            self._format_unencoded_with_lineno(tokensource, outfile)
+            return
+
+        for ttype, value in tokensource:
+            color = self.colorscheme.get(ttype)
+            while color is None:
+                ttype = ttype[:-1]
+                color = self.colorscheme.get(ttype)
+            if color:
+                color = color[self.darkbg]
+                spl = value.split('\n')
+                for line in spl[:-1]:
+                    if line:
+                        outfile.write(ircformat(color, line))
+                    outfile.write('\n')
+                if spl[-1]:
+                    outfile.write(ircformat(color, spl[-1]))
+            else:
+                outfile.write(value)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/latex.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/latex.py
new file mode 100644
index 0000000..4a7375a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/latex.py
@@ -0,0 +1,521 @@
+"""
+    pygments.formatters.latex
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for LaTeX fancyvrb output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from io import StringIO
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.lexer import Lexer, do_insertions
+from pip._vendor.pygments.token import Token, STANDARD_TYPES
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt
+
+
+__all__ = ['LatexFormatter']
+
+
+def escape_tex(text, commandprefix):
+    return text.replace('\\', '\x00'). \
+                replace('{', '\x01'). \
+                replace('}', '\x02'). \
+                replace('\x00', r'\%sZbs{}' % commandprefix). \
+                replace('\x01', r'\%sZob{}' % commandprefix). \
+                replace('\x02', r'\%sZcb{}' % commandprefix). \
+                replace('^', r'\%sZca{}' % commandprefix). \
+                replace('_', r'\%sZus{}' % commandprefix). \
+                replace('&', r'\%sZam{}' % commandprefix). \
+                replace('<', r'\%sZlt{}' % commandprefix). \
+                replace('>', r'\%sZgt{}' % commandprefix). \
+                replace('#', r'\%sZsh{}' % commandprefix). \
+                replace('%', r'\%sZpc{}' % commandprefix). \
+                replace('$', r'\%sZdl{}' % commandprefix). \
+                replace('-', r'\%sZhy{}' % commandprefix). \
+                replace("'", r'\%sZsq{}' % commandprefix). \
+                replace('"', r'\%sZdq{}' % commandprefix). \
+                replace('~', r'\%sZti{}' % commandprefix)
+
+
+DOC_TEMPLATE = r'''
+\documentclass{%(docclass)s}
+\usepackage{fancyvrb}
+\usepackage{color}
+\usepackage[%(encoding)s]{inputenc}
+%(preamble)s
+
+%(styledefs)s
+
+\begin{document}
+
+\section*{%(title)s}
+
+%(code)s
+\end{document}
+'''
+
+## Small explanation of the mess below :)
+#
+# The previous version of the LaTeX formatter just assigned a command to
+# each token type defined in the current style.  That obviously is
+# problematic if the highlighted code is produced for a different style
+# than the style commands themselves.
+#
+# This version works much like the HTML formatter which assigns multiple
+# CSS classes to each <span> tag, from the most specific to the least
+# specific token type, thus falling back to the parent token type if one
+# is not defined.  Here, the classes are there too and use the same short
+# forms given in token.STANDARD_TYPES.
+#
+# Highlighted code now only uses one custom command, which by default is
+# \PY and selectable by the commandprefix option (and in addition the
+# escapes \PYZat, \PYZlb and \PYZrb which haven't been renamed for
+# backwards compatibility purposes).
+#
+# \PY has two arguments: the classes, separated by +, and the text to
+# render in that style.  The classes are resolved into the respective
+# style commands by magic, which serves to ignore unknown classes.
+#
+# The magic macros are:
+# * \PY@it, \PY@bf, etc. are unconditionally wrapped around the text
+#   to render in \PY@do.  Their definition determines the style.
+# * \PY@reset resets \PY@it etc. to do nothing.
+# * \PY@toks parses the list of classes, using magic inspired by the
+#   keyval package (but modified to use plusses instead of commas
+#   because fancyvrb redefines commas inside its environments).
+# * \PY@tok processes one class, calling the \PY@tok@classname command
+#   if it exists.
+# * \PY@tok@classname sets the \PY@it etc. to reflect the chosen style
+#   for its class.
+# * \PY resets the style, parses the classnames and then calls \PY@do.
+#
+# Tip: to read this code, print it out in substituted form using e.g.
+# >>> print STYLE_TEMPLATE % {'cp': 'PY'}
+
+STYLE_TEMPLATE = r'''
+\makeatletter
+\def\%(cp)s@reset{\let\%(cp)s@it=\relax \let\%(cp)s@bf=\relax%%
+    \let\%(cp)s@ul=\relax \let\%(cp)s@tc=\relax%%
+    \let\%(cp)s@bc=\relax \let\%(cp)s@ff=\relax}
+\def\%(cp)s@tok#1{\csname %(cp)s@tok@#1\endcsname}
+\def\%(cp)s@toks#1+{\ifx\relax#1\empty\else%%
+    \%(cp)s@tok{#1}\expandafter\%(cp)s@toks\fi}
+\def\%(cp)s@do#1{\%(cp)s@bc{\%(cp)s@tc{\%(cp)s@ul{%%
+    \%(cp)s@it{\%(cp)s@bf{\%(cp)s@ff{#1}}}}}}}
+\def\%(cp)s#1#2{\%(cp)s@reset\%(cp)s@toks#1+\relax+\%(cp)s@do{#2}}
+
+%(styles)s
+
+\def\%(cp)sZbs{\char`\\}
+\def\%(cp)sZus{\char`\_}
+\def\%(cp)sZob{\char`\{}
+\def\%(cp)sZcb{\char`\}}
+\def\%(cp)sZca{\char`\^}
+\def\%(cp)sZam{\char`\&}
+\def\%(cp)sZlt{\char`\<}
+\def\%(cp)sZgt{\char`\>}
+\def\%(cp)sZsh{\char`\#}
+\def\%(cp)sZpc{\char`\%%}
+\def\%(cp)sZdl{\char`\$}
+\def\%(cp)sZhy{\char`\-}
+\def\%(cp)sZsq{\char`\'}
+\def\%(cp)sZdq{\char`\"}
+\def\%(cp)sZti{\char`\~}
+%% for compatibility with earlier versions
+\def\%(cp)sZat{@}
+\def\%(cp)sZlb{[}
+\def\%(cp)sZrb{]}
+\makeatother
+'''
+
+
+def _get_ttype_name(ttype):
+    fname = STANDARD_TYPES.get(ttype)
+    if fname:
+        return fname
+    aname = ''
+    while fname is None:
+        aname = ttype[-1] + aname
+        ttype = ttype.parent
+        fname = STANDARD_TYPES.get(ttype)
+    return fname + aname
+
+
+class LatexFormatter(Formatter):
+    r"""
+    Format tokens as LaTeX code. This needs the `fancyvrb` and `color`
+    standard packages.
+
+    Without the `full` option, code is formatted as one ``Verbatim``
+    environment, like this:
+
+    .. sourcecode:: latex
+
+        \begin{Verbatim}[commandchars=\\\{\}]
+        \PY{k}{def }\PY{n+nf}{foo}(\PY{n}{bar}):
+            \PY{k}{pass}
+        \end{Verbatim}
+
+    Wrapping can be disabled using the `nowrap` option.
+
+    The special command used here (``\PY``) and all the other macros it needs
+    are output by the `get_style_defs` method.
+
+    With the `full` option, a complete LaTeX document is output, including
+    the command definitions in the preamble.
+
+    The `get_style_defs()` method of a `LatexFormatter` returns a string
+    containing ``\def`` commands defining the macros needed inside the
+    ``Verbatim`` environments.
+
+    Additional options accepted:
+
+    `nowrap`
+        If set to ``True``, don't wrap the tokens at all, not even inside a
+        ``\begin{Verbatim}`` environment. This disables most other options
+        (default: ``False``).
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+
+    `full`
+        Tells the formatter to output a "full" document, i.e. a complete
+        self-contained document (default: ``False``).
+
+    `title`
+        If `full` is true, the title that should be used to caption the
+        document (default: ``''``).
+
+    `docclass`
+        If the `full` option is enabled, this is the document class to use
+        (default: ``'article'``).
+
+    `preamble`
+        If the `full` option is enabled, this can be further preamble commands,
+        e.g. ``\usepackage`` (default: ``''``).
+
+    `linenos`
+        If set to ``True``, output line numbers (default: ``False``).
+
+    `linenostart`
+        The line number for the first line (default: ``1``).
+
+    `linenostep`
+        If set to a number n > 1, only every nth line number is printed.
+
+    `verboptions`
+        Additional options given to the Verbatim environment (see the *fancyvrb*
+        docs for possible values) (default: ``''``).
+
+    `commandprefix`
+        The LaTeX commands used to produce colored output are constructed
+        using this prefix and some letters (default: ``'PY'``).
+
+        .. versionadded:: 0.7
+        .. versionchanged:: 0.10
+           The default is now ``'PY'`` instead of ``'C'``.
+
+    `texcomments`
+        If set to ``True``, enables LaTeX comment lines.  That is, LaTex markup
+        in comment tokens is not escaped so that LaTeX can render it (default:
+        ``False``).
+
+        .. versionadded:: 1.2
+
+    `mathescape`
+        If set to ``True``, enables LaTeX math mode escape in comments. That
+        is, ``'$...$'`` inside a comment will trigger math mode (default:
+        ``False``).
+
+        .. versionadded:: 1.2
+
+    `escapeinside`
+        If set to a string of length 2, enables escaping to LaTeX. Text
+        delimited by these 2 characters is read as LaTeX code and
+        typeset accordingly. It has no effect in string literals. It has
+        no effect in comments if `texcomments` or `mathescape` is
+        set. (default: ``''``).
+
+        .. versionadded:: 2.0
+
+    `envname`
+        Allows you to pick an alternative environment name replacing Verbatim.
+        The alternate environment still has to support Verbatim's option syntax.
+        (default: ``'Verbatim'``).
+
+        .. versionadded:: 2.0
+    """
+    name = 'LaTeX'
+    aliases = ['latex', 'tex']
+    filenames = ['*.tex']
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self.nowrap = get_bool_opt(options, 'nowrap', False)
+        self.docclass = options.get('docclass', 'article')
+        self.preamble = options.get('preamble', '')
+        self.linenos = get_bool_opt(options, 'linenos', False)
+        self.linenostart = abs(get_int_opt(options, 'linenostart', 1))
+        self.linenostep = abs(get_int_opt(options, 'linenostep', 1))
+        self.verboptions = options.get('verboptions', '')
+        self.nobackground = get_bool_opt(options, 'nobackground', False)
+        self.commandprefix = options.get('commandprefix', 'PY')
+        self.texcomments = get_bool_opt(options, 'texcomments', False)
+        self.mathescape = get_bool_opt(options, 'mathescape', False)
+        self.escapeinside = options.get('escapeinside', '')
+        if len(self.escapeinside) == 2:
+            self.left = self.escapeinside[0]
+            self.right = self.escapeinside[1]
+        else:
+            self.escapeinside = ''
+        self.envname = options.get('envname', 'Verbatim')
+
+        self._create_stylesheet()
+
+    def _create_stylesheet(self):
+        t2n = self.ttype2name = {Token: ''}
+        c2d = self.cmd2def = {}
+        cp = self.commandprefix
+
+        def rgbcolor(col):
+            if col:
+                return ','.join(['%.2f' % (int(col[i] + col[i + 1], 16) / 255.0)
+                                 for i in (0, 2, 4)])
+            else:
+                return '1,1,1'
+
+        for ttype, ndef in self.style:
+            name = _get_ttype_name(ttype)
+            cmndef = ''
+            if ndef['bold']:
+                cmndef += r'\let\$$@bf=\textbf'
+            if ndef['italic']:
+                cmndef += r'\let\$$@it=\textit'
+            if ndef['underline']:
+                cmndef += r'\let\$$@ul=\underline'
+            if ndef['roman']:
+                cmndef += r'\let\$$@ff=\textrm'
+            if ndef['sans']:
+                cmndef += r'\let\$$@ff=\textsf'
+            if ndef['mono']:
+                cmndef += r'\let\$$@ff=\textsf'
+            if ndef['color']:
+                cmndef += (r'\def\$$@tc##1{\textcolor[rgb]{%s}{##1}}' %
+                           rgbcolor(ndef['color']))
+            if ndef['border']:
+                cmndef += (r'\def\$$@bc##1{{\setlength{\fboxsep}{\string -\fboxrule}'
+                           r'\fcolorbox[rgb]{%s}{%s}{\strut ##1}}}' %
+                           (rgbcolor(ndef['border']),
+                            rgbcolor(ndef['bgcolor'])))
+            elif ndef['bgcolor']:
+                cmndef += (r'\def\$$@bc##1{{\setlength{\fboxsep}{0pt}'
+                           r'\colorbox[rgb]{%s}{\strut ##1}}}' %
+                           rgbcolor(ndef['bgcolor']))
+            if cmndef == '':
+                continue
+            cmndef = cmndef.replace('$$', cp)
+            t2n[ttype] = name
+            c2d[name] = cmndef
+
+    def get_style_defs(self, arg=''):
+        """
+        Return the command sequences needed to define the commands
+        used to format text in the verbatim environment. ``arg`` is ignored.
+        """
+        cp = self.commandprefix
+        styles = []
+        for name, definition in self.cmd2def.items():
+            styles.append(r'\@namedef{%s@tok@%s}{%s}' % (cp, name, definition))
+        return STYLE_TEMPLATE % {'cp': self.commandprefix,
+                                 'styles': '\n'.join(styles)}
+
+    def format_unencoded(self, tokensource, outfile):
+        # TODO: add support for background colors
+        t2n = self.ttype2name
+        cp = self.commandprefix
+
+        if self.full:
+            realoutfile = outfile
+            outfile = StringIO()
+
+        if not self.nowrap:
+            outfile.write('\\begin{' + self.envname + '}[commandchars=\\\\\\{\\}')
+            if self.linenos:
+                start, step = self.linenostart, self.linenostep
+                outfile.write(',numbers=left' +
+                              (start and ',firstnumber=%d' % start or '') +
+                              (step and ',stepnumber=%d' % step or ''))
+            if self.mathescape or self.texcomments or self.escapeinside:
+                outfile.write(',codes={\\catcode`\\$=3\\catcode`\\^=7'
+                              '\\catcode`\\_=8\\relax}')
+            if self.verboptions:
+                outfile.write(',' + self.verboptions)
+            outfile.write(']\n')
+
+        for ttype, value in tokensource:
+            if ttype in Token.Comment:
+                if self.texcomments:
+                    # Try to guess comment starting lexeme and escape it ...
+                    start = value[0:1]
+                    for i in range(1, len(value)):
+                        if start[0] != value[i]:
+                            break
+                        start += value[i]
+
+                    value = value[len(start):]
+                    start = escape_tex(start, cp)
+
+                    # ... but do not escape inside comment.
+                    value = start + value
+                elif self.mathescape:
+                    # Only escape parts not inside a math environment.
+                    parts = value.split('$')
+                    in_math = False
+                    for i, part in enumerate(parts):
+                        if not in_math:
+                            parts[i] = escape_tex(part, cp)
+                        in_math = not in_math
+                    value = '$'.join(parts)
+                elif self.escapeinside:
+                    text = value
+                    value = ''
+                    while text:
+                        a, sep1, text = text.partition(self.left)
+                        if sep1:
+                            b, sep2, text = text.partition(self.right)
+                            if sep2:
+                                value += escape_tex(a, cp) + b
+                            else:
+                                value += escape_tex(a + sep1 + b, cp)
+                        else:
+                            value += escape_tex(a, cp)
+                else:
+                    value = escape_tex(value, cp)
+            elif ttype not in Token.Escape:
+                value = escape_tex(value, cp)
+            styles = []
+            while ttype is not Token:
+                try:
+                    styles.append(t2n[ttype])
+                except KeyError:
+                    # not in current style
+                    styles.append(_get_ttype_name(ttype))
+                ttype = ttype.parent
+            styleval = '+'.join(reversed(styles))
+            if styleval:
+                spl = value.split('\n')
+                for line in spl[:-1]:
+                    if line:
+                        outfile.write("\\%s{%s}{%s}" % (cp, styleval, line))
+                    outfile.write('\n')
+                if spl[-1]:
+                    outfile.write("\\%s{%s}{%s}" % (cp, styleval, spl[-1]))
+            else:
+                outfile.write(value)
+
+        if not self.nowrap:
+            outfile.write('\\end{' + self.envname + '}\n')
+
+        if self.full:
+            encoding = self.encoding or 'utf8'
+            # map known existings encodings from LaTeX distribution
+            encoding = {
+                'utf_8': 'utf8',
+                'latin_1': 'latin1',
+                'iso_8859_1': 'latin1',
+            }.get(encoding.replace('-', '_'), encoding)
+            realoutfile.write(DOC_TEMPLATE %
+                dict(docclass  = self.docclass,
+                     preamble  = self.preamble,
+                     title     = self.title,
+                     encoding  = encoding,
+                     styledefs = self.get_style_defs(),
+                     code      = outfile.getvalue()))
+
+
+class LatexEmbeddedLexer(Lexer):
+    """
+    This lexer takes one lexer as argument, the lexer for the language
+    being formatted, and the left and right delimiters for escaped text.
+
+    First everything is scanned using the language lexer to obtain
+    strings and comments. All other consecutive tokens are merged and
+    the resulting text is scanned for escaped segments, which are given
+    the Token.Escape type. Finally text that is not escaped is scanned
+    again with the language lexer.
+    """
+    def __init__(self, left, right, lang, **options):
+        self.left = left
+        self.right = right
+        self.lang = lang
+        Lexer.__init__(self, **options)
+
+    def get_tokens_unprocessed(self, text):
+        # find and remove all the escape tokens (replace with an empty string)
+        # this is very similar to DelegatingLexer.get_tokens_unprocessed.
+        buffered = ''
+        insertions = []
+        insertion_buf = []
+        for i, t, v in self._find_safe_escape_tokens(text):
+            if t is None:
+                if insertion_buf:
+                    insertions.append((len(buffered), insertion_buf))
+                    insertion_buf = []
+                buffered += v
+            else:
+                insertion_buf.append((i, t, v))
+        if insertion_buf:
+            insertions.append((len(buffered), insertion_buf))
+        return do_insertions(insertions,
+                             self.lang.get_tokens_unprocessed(buffered))
+
+    def _find_safe_escape_tokens(self, text):
+        """ find escape tokens that are not in strings or comments """
+        for i, t, v in self._filter_to(
+            self.lang.get_tokens_unprocessed(text),
+            lambda t: t in Token.Comment or t in Token.String
+        ):
+            if t is None:
+                for i2, t2, v2 in self._find_escape_tokens(v):
+                    yield i + i2, t2, v2
+            else:
+                yield i, None, v
+
+    def _filter_to(self, it, pred):
+        """ Keep only the tokens that match `pred`, merge the others together """
+        buf = ''
+        idx = 0
+        for i, t, v in it:
+            if pred(t):
+                if buf:
+                    yield idx, None, buf
+                    buf = ''
+                yield i, t, v
+            else:
+                if not buf:
+                    idx = i
+                buf += v
+        if buf:
+            yield idx, None, buf
+
+    def _find_escape_tokens(self, text):
+        """ Find escape tokens within text, give token=None otherwise """
+        index = 0
+        while text:
+            a, sep1, text = text.partition(self.left)
+            if a:
+                yield index, None, a
+                index += len(a)
+            if sep1:
+                b, sep2, text = text.partition(self.right)
+                if sep2:
+                    yield index + len(sep1), Token.Escape, b
+                    index += len(sep1) + len(b) + len(sep2)
+                else:
+                    yield index, Token.Error, sep1
+                    index += len(sep1)
+                    text = b
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/other.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/other.py
new file mode 100644
index 0000000..1e39cd4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/other.py
@@ -0,0 +1,161 @@
+"""
+    pygments.formatters.other
+    ~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Other formatters: NullFormatter, RawTokenFormatter.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.util import get_choice_opt
+from pip._vendor.pygments.token import Token
+from pip._vendor.pygments.console import colorize
+
+__all__ = ['NullFormatter', 'RawTokenFormatter', 'TestcaseFormatter']
+
+
+class NullFormatter(Formatter):
+    """
+    Output the text unchanged without any formatting.
+    """
+    name = 'Text only'
+    aliases = ['text', 'null']
+    filenames = ['*.txt']
+
+    def format(self, tokensource, outfile):
+        enc = self.encoding
+        for ttype, value in tokensource:
+            if enc:
+                outfile.write(value.encode(enc))
+            else:
+                outfile.write(value)
+
+
+class RawTokenFormatter(Formatter):
+    r"""
+    Format tokens as a raw representation for storing token streams.
+
+    The format is ``tokentype<TAB>repr(tokenstring)\n``. The output can later
+    be converted to a token stream with the `RawTokenLexer`, described in the
+    :doc:`lexer list <lexers>`.
+
+    Only two options are accepted:
+
+    `compress`
+        If set to ``'gz'`` or ``'bz2'``, compress the output with the given
+        compression algorithm after encoding (default: ``''``).
+    `error_color`
+        If set to a color name, highlight error tokens using that color.  If
+        set but with no value, defaults to ``'red'``.
+
+        .. versionadded:: 0.11
+
+    """
+    name = 'Raw tokens'
+    aliases = ['raw', 'tokens']
+    filenames = ['*.raw']
+
+    unicodeoutput = False
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        # We ignore self.encoding if it is set, since it gets set for lexer
+        # and formatter if given with -Oencoding on the command line.
+        # The RawTokenFormatter outputs only ASCII. Override here.
+        self.encoding = 'ascii'  # let pygments.format() do the right thing
+        self.compress = get_choice_opt(options, 'compress',
+                                       ['', 'none', 'gz', 'bz2'], '')
+        self.error_color = options.get('error_color', None)
+        if self.error_color is True:
+            self.error_color = 'red'
+        if self.error_color is not None:
+            try:
+                colorize(self.error_color, '')
+            except KeyError:
+                raise ValueError("Invalid color %r specified" %
+                                 self.error_color)
+
+    def format(self, tokensource, outfile):
+        try:
+            outfile.write(b'')
+        except TypeError:
+            raise TypeError('The raw tokens formatter needs a binary '
+                            'output file')
+        if self.compress == 'gz':
+            import gzip
+            outfile = gzip.GzipFile('', 'wb', 9, outfile)
+
+            write = outfile.write
+            flush = outfile.close
+        elif self.compress == 'bz2':
+            import bz2
+            compressor = bz2.BZ2Compressor(9)
+
+            def write(text):
+                outfile.write(compressor.compress(text))
+
+            def flush():
+                outfile.write(compressor.flush())
+                outfile.flush()
+        else:
+            write = outfile.write
+            flush = outfile.flush
+
+        if self.error_color:
+            for ttype, value in tokensource:
+                line = b"%r\t%r\n" % (ttype, value)
+                if ttype is Token.Error:
+                    write(colorize(self.error_color, line))
+                else:
+                    write(line)
+        else:
+            for ttype, value in tokensource:
+                write(b"%r\t%r\n" % (ttype, value))
+        flush()
+
+
+TESTCASE_BEFORE = '''\
+    def testNeedsName(lexer):
+        fragment = %r
+        tokens = [
+'''
+TESTCASE_AFTER = '''\
+        ]
+        assert list(lexer.get_tokens(fragment)) == tokens
+'''
+
+
+class TestcaseFormatter(Formatter):
+    """
+    Format tokens as appropriate for a new testcase.
+
+    .. versionadded:: 2.0
+    """
+    name = 'Testcase'
+    aliases = ['testcase']
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        if self.encoding is not None and self.encoding != 'utf-8':
+            raise ValueError("Only None and utf-8 are allowed encodings.")
+
+    def format(self, tokensource, outfile):
+        indentation = ' ' * 12
+        rawbuf = []
+        outbuf = []
+        for ttype, value in tokensource:
+            rawbuf.append(value)
+            outbuf.append('%s(%s, %r),\n' % (indentation, ttype, value))
+
+        before = TESTCASE_BEFORE % (''.join(rawbuf),)
+        during = ''.join(outbuf)
+        after = TESTCASE_AFTER
+        if self.encoding is None:
+            outfile.write(before + during + after)
+        else:
+            outfile.write(before.encode('utf-8'))
+            outfile.write(during.encode('utf-8'))
+            outfile.write(after.encode('utf-8'))
+        outfile.flush()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/pangomarkup.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/pangomarkup.py
new file mode 100644
index 0000000..bd00866
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/pangomarkup.py
@@ -0,0 +1,83 @@
+"""
+    pygments.formatters.pangomarkup
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for Pango markup output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+
+
+__all__ = ['PangoMarkupFormatter']
+
+
+_escape_table = {
+    ord('&'): '&amp;',
+    ord('<'): '&lt;',
+}
+
+
+def escape_special_chars(text, table=_escape_table):
+    """Escape & and < for Pango Markup."""
+    return text.translate(table)
+
+
+class PangoMarkupFormatter(Formatter):
+    """
+    Format tokens as Pango Markup code. It can then be rendered to an SVG.
+
+    .. versionadded:: 2.9
+    """
+
+    name = 'Pango Markup'
+    aliases = ['pango', 'pangomarkup']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+
+        self.styles = {}
+
+        for token, style in self.style:
+            start = ''
+            end = ''
+            if style['color']:
+                start += '<span fgcolor="#%s">' % style['color']
+                end = '</span>' + end
+            if style['bold']:
+                start += '<b>'
+                end = '</b>' + end
+            if style['italic']:
+                start += '<i>'
+                end = '</i>' + end
+            if style['underline']:
+                start += '<u>'
+                end = '</u>' + end
+            self.styles[token] = (start, end)
+
+    def format_unencoded(self, tokensource, outfile):
+        lastval = ''
+        lasttype = None
+
+        outfile.write('<tt>')
+
+        for ttype, value in tokensource:
+            while ttype not in self.styles:
+                ttype = ttype.parent
+            if ttype == lasttype:
+                lastval += escape_special_chars(value)
+            else:
+                if lastval:
+                    stylebegin, styleend = self.styles[lasttype]
+                    outfile.write(stylebegin + lastval + styleend)
+                lastval = escape_special_chars(value)
+                lasttype = ttype
+
+        if lastval:
+            stylebegin, styleend = self.styles[lasttype]
+            outfile.write(stylebegin + lastval + styleend)
+
+        outfile.write('</tt>')
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/rtf.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/rtf.py
new file mode 100644
index 0000000..4114d16
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/rtf.py
@@ -0,0 +1,146 @@
+"""
+    pygments.formatters.rtf
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    A formatter that generates RTF files.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.util import get_int_opt, surrogatepair
+
+
+__all__ = ['RtfFormatter']
+
+
+class RtfFormatter(Formatter):
+    """
+    Format tokens as RTF markup. This formatter automatically outputs full RTF
+    documents with color information and other useful stuff. Perfect for Copy and
+    Paste into Microsoft(R) Word(R) documents.
+
+    Please note that ``encoding`` and ``outencoding`` options are ignored.
+    The RTF format is ASCII natively, but handles unicode characters correctly
+    thanks to escape sequences.
+
+    .. versionadded:: 0.6
+
+    Additional options accepted:
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+
+    `fontface`
+        The used font family, for example ``Bitstream Vera Sans``. Defaults to
+        some generic font which is supposed to have fixed width.
+
+    `fontsize`
+        Size of the font used. Size is specified in half points. The
+        default is 24 half-points, giving a size 12 font.
+
+        .. versionadded:: 2.0
+    """
+    name = 'RTF'
+    aliases = ['rtf']
+    filenames = ['*.rtf']
+
+    def __init__(self, **options):
+        r"""
+        Additional options accepted:
+
+        ``fontface``
+            Name of the font used. Could for example be ``'Courier New'``
+            to further specify the default which is ``'\fmodern'``. The RTF
+            specification claims that ``\fmodern`` are "Fixed-pitch serif
+            and sans serif fonts". Hope every RTF implementation thinks
+            the same about modern...
+
+        """
+        Formatter.__init__(self, **options)
+        self.fontface = options.get('fontface') or ''
+        self.fontsize = get_int_opt(options, 'fontsize', 0)
+
+    def _escape(self, text):
+        return text.replace('\\', '\\\\') \
+                   .replace('{', '\\{') \
+                   .replace('}', '\\}')
+
+    def _escape_text(self, text):
+        # empty strings, should give a small performance improvement
+        if not text:
+            return ''
+
+        # escape text
+        text = self._escape(text)
+
+        buf = []
+        for c in text:
+            cn = ord(c)
+            if cn < (2**7):
+                # ASCII character
+                buf.append(str(c))
+            elif (2**7) <= cn < (2**16):
+                # single unicode escape sequence
+                buf.append('{\\u%d}' % cn)
+            elif (2**16) <= cn:
+                # RTF limits unicode to 16 bits.
+                # Force surrogate pairs
+                buf.append('{\\u%d}{\\u%d}' % surrogatepair(cn))
+
+        return ''.join(buf).replace('\n', '\\par\n')
+
+    def format_unencoded(self, tokensource, outfile):
+        # rtf 1.8 header
+        outfile.write('{\\rtf1\\ansi\\uc0\\deff0'
+                      '{\\fonttbl{\\f0\\fmodern\\fprq1\\fcharset0%s;}}'
+                      '{\\colortbl;' % (self.fontface and
+                                        ' ' + self._escape(self.fontface) or
+                                        ''))
+
+        # convert colors and save them in a mapping to access them later.
+        color_mapping = {}
+        offset = 1
+        for _, style in self.style:
+            for color in style['color'], style['bgcolor'], style['border']:
+                if color and color not in color_mapping:
+                    color_mapping[color] = offset
+                    outfile.write('\\red%d\\green%d\\blue%d;' % (
+                        int(color[0:2], 16),
+                        int(color[2:4], 16),
+                        int(color[4:6], 16)
+                    ))
+                    offset += 1
+        outfile.write('}\\f0 ')
+        if self.fontsize:
+            outfile.write('\\fs%d' % self.fontsize)
+
+        # highlight stream
+        for ttype, value in tokensource:
+            while not self.style.styles_token(ttype) and ttype.parent:
+                ttype = ttype.parent
+            style = self.style.style_for_token(ttype)
+            buf = []
+            if style['bgcolor']:
+                buf.append('\\cb%d' % color_mapping[style['bgcolor']])
+            if style['color']:
+                buf.append('\\cf%d' % color_mapping[style['color']])
+            if style['bold']:
+                buf.append('\\b')
+            if style['italic']:
+                buf.append('\\i')
+            if style['underline']:
+                buf.append('\\ul')
+            if style['border']:
+                buf.append('\\chbrdr\\chcfpat%d' %
+                           color_mapping[style['border']])
+            start = ''.join(buf)
+            if start:
+                outfile.write('{%s ' % start)
+            outfile.write(self._escape_text(value))
+            if start:
+                outfile.write('}')
+
+        outfile.write('}')
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/svg.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/svg.py
new file mode 100644
index 0000000..075150a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/svg.py
@@ -0,0 +1,188 @@
+"""
+    pygments.formatters.svg
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for SVG output.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.token import Comment
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt
+
+__all__ = ['SvgFormatter']
+
+
+def escape_html(text):
+    """Escape &, <, > as well as single and double quotes for HTML."""
+    return text.replace('&', '&amp;').  \
+                replace('<', '&lt;').   \
+                replace('>', '&gt;').   \
+                replace('"', '&quot;'). \
+                replace("'", '&#39;')
+
+
+class2style = {}
+
+class SvgFormatter(Formatter):
+    """
+    Format tokens as an SVG graphics file.  This formatter is still experimental.
+    Each line of code is a ``<text>`` element with explicit ``x`` and ``y``
+    coordinates containing ``<tspan>`` elements with the individual token styles.
+
+    By default, this formatter outputs a full SVG document including doctype
+    declaration and the ``<svg>`` root element.
+
+    .. versionadded:: 0.9
+
+    Additional options accepted:
+
+    `nowrap`
+        Don't wrap the SVG ``<text>`` elements in ``<svg><g>`` elements and
+        don't add a XML declaration and a doctype.  If true, the `fontfamily`
+        and `fontsize` options are ignored.  Defaults to ``False``.
+
+    `fontfamily`
+        The value to give the wrapping ``<g>`` element's ``font-family``
+        attribute, defaults to ``"monospace"``.
+
+    `fontsize`
+        The value to give the wrapping ``<g>`` element's ``font-size``
+        attribute, defaults to ``"14px"``.
+
+    `linenos`
+        If ``True``, add line numbers (default: ``False``).
+
+    `linenostart`
+        The line number for the first line (default: ``1``).
+
+    `linenostep`
+        If set to a number n > 1, only every nth line number is printed.
+        
+    `linenowidth`
+        Maximum width devoted to line numbers (default: ``3*ystep``, sufficient
+        for up to 4-digit line numbers. Increase width for longer code blocks).  
+        
+    `xoffset`
+        Starting offset in X direction, defaults to ``0``.
+
+    `yoffset`
+        Starting offset in Y direction, defaults to the font size if it is given
+        in pixels, or ``20`` else.  (This is necessary since text coordinates
+        refer to the text baseline, not the top edge.)
+
+    `ystep`
+        Offset to add to the Y coordinate for each subsequent line.  This should
+        roughly be the text size plus 5.  It defaults to that value if the text
+        size is given in pixels, or ``25`` else.
+
+    `spacehack`
+        Convert spaces in the source to ``&#160;``, which are non-breaking
+        spaces.  SVG provides the ``xml:space`` attribute to control how
+        whitespace inside tags is handled, in theory, the ``preserve`` value
+        could be used to keep all whitespace as-is.  However, many current SVG
+        viewers don't obey that rule, so this option is provided as a workaround
+        and defaults to ``True``.
+    """
+    name = 'SVG'
+    aliases = ['svg']
+    filenames = ['*.svg']
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self.nowrap = get_bool_opt(options, 'nowrap', False)
+        self.fontfamily = options.get('fontfamily', 'monospace')
+        self.fontsize = options.get('fontsize', '14px')
+        self.xoffset = get_int_opt(options, 'xoffset', 0)
+        fs = self.fontsize.strip()
+        if fs.endswith('px'): fs = fs[:-2].strip()
+        try:
+            int_fs = int(fs)
+        except:
+            int_fs = 20
+        self.yoffset = get_int_opt(options, 'yoffset', int_fs)
+        self.ystep = get_int_opt(options, 'ystep', int_fs + 5)
+        self.spacehack = get_bool_opt(options, 'spacehack', True)
+        self.linenos = get_bool_opt(options,'linenos',False)
+        self.linenostart = get_int_opt(options,'linenostart',1)
+        self.linenostep = get_int_opt(options,'linenostep',1)
+        self.linenowidth = get_int_opt(options,'linenowidth', 3*self.ystep)
+        self._stylecache = {}
+
+    def format_unencoded(self, tokensource, outfile):
+        """
+        Format ``tokensource``, an iterable of ``(tokentype, tokenstring)``
+        tuples and write it into ``outfile``.
+
+        For our implementation we put all lines in their own 'line group'.
+        """
+        x = self.xoffset
+        y = self.yoffset
+        if not self.nowrap:
+            if self.encoding:
+                outfile.write('<?xml version="1.0" encoding="%s"?>\n' %
+                              self.encoding)
+            else:
+                outfile.write('<?xml version="1.0"?>\n')
+            outfile.write('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" '
+                          '"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/'
+                          'svg10.dtd">\n')
+            outfile.write('<svg xmlns="http://www.w3.org/2000/svg">\n')
+            outfile.write('<g font-family="%s" font-size="%s">\n' %
+                          (self.fontfamily, self.fontsize))
+        
+        counter = self.linenostart 
+        counter_step = self.linenostep
+        counter_style = self._get_style(Comment)
+        line_x = x
+        
+        if self.linenos:
+            if counter % counter_step == 0:
+                outfile.write('<text x="%s" y="%s" %s text-anchor="end">%s</text>' %
+                    (x+self.linenowidth,y,counter_style,counter))
+            line_x += self.linenowidth + self.ystep
+            counter += 1
+
+        outfile.write('<text x="%s" y="%s" xml:space="preserve">' % (line_x, y))
+        for ttype, value in tokensource:
+            style = self._get_style(ttype)
+            tspan = style and '<tspan' + style + '>' or ''
+            tspanend = tspan and '</tspan>' or ''
+            value = escape_html(value)
+            if self.spacehack:
+                value = value.expandtabs().replace(' ', '&#160;')
+            parts = value.split('\n')
+            for part in parts[:-1]:
+                outfile.write(tspan + part + tspanend)
+                y += self.ystep
+                outfile.write('</text>\n')
+                if self.linenos and counter % counter_step == 0:
+                    outfile.write('<text x="%s" y="%s" text-anchor="end" %s>%s</text>' %
+                        (x+self.linenowidth,y,counter_style,counter))
+                
+                counter += 1
+                outfile.write('<text x="%s" y="%s" ' 'xml:space="preserve">' % (line_x,y))
+            outfile.write(tspan + parts[-1] + tspanend)
+        outfile.write('</text>')
+
+        if not self.nowrap:
+            outfile.write('</g></svg>\n')
+
+    def _get_style(self, tokentype):
+        if tokentype in self._stylecache:
+            return self._stylecache[tokentype]
+        otokentype = tokentype
+        while not self.style.styles_token(tokentype):
+            tokentype = tokentype.parent
+        value = self.style.style_for_token(tokentype)
+        result = ''
+        if value['color']:
+            result = ' fill="#' + value['color'] + '"'
+        if value['bold']:
+            result += ' font-weight="bold"'
+        if value['italic']:
+            result += ' font-style="italic"'
+        self._stylecache[otokentype] = result
+        return result
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal.py
new file mode 100644
index 0000000..e0bda16
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal.py
@@ -0,0 +1,127 @@
+"""
+    pygments.formatters.terminal
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for terminal output with ANSI sequences.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.token import Keyword, Name, Comment, String, Error, \
+    Number, Operator, Generic, Token, Whitespace
+from pip._vendor.pygments.console import ansiformat
+from pip._vendor.pygments.util import get_choice_opt
+
+
+__all__ = ['TerminalFormatter']
+
+
+#: Map token types to a tuple of color values for light and dark
+#: backgrounds.
+TERMINAL_COLORS = {
+    Token:              ('',            ''),
+
+    Whitespace:         ('gray',   'brightblack'),
+    Comment:            ('gray',   'brightblack'),
+    Comment.Preproc:    ('cyan',        'brightcyan'),
+    Keyword:            ('blue',    'brightblue'),
+    Keyword.Type:       ('cyan',        'brightcyan'),
+    Operator.Word:      ('magenta',      'brightmagenta'),
+    Name.Builtin:       ('cyan',        'brightcyan'),
+    Name.Function:      ('green',   'brightgreen'),
+    Name.Namespace:     ('_cyan_',      '_brightcyan_'),
+    Name.Class:         ('_green_', '_brightgreen_'),
+    Name.Exception:     ('cyan',        'brightcyan'),
+    Name.Decorator:     ('brightblack',    'gray'),
+    Name.Variable:      ('red',     'brightred'),
+    Name.Constant:      ('red',     'brightred'),
+    Name.Attribute:     ('cyan',        'brightcyan'),
+    Name.Tag:           ('brightblue',        'brightblue'),
+    String:             ('yellow',       'yellow'),
+    Number:             ('blue',    'brightblue'),
+
+    Generic.Deleted:    ('brightred',        'brightred'),
+    Generic.Inserted:   ('green',  'brightgreen'),
+    Generic.Heading:    ('**',         '**'),
+    Generic.Subheading: ('*magenta*',   '*brightmagenta*'),
+    Generic.Prompt:     ('**',         '**'),
+    Generic.Error:      ('brightred',        'brightred'),
+
+    Error:              ('_brightred_',      '_brightred_'),
+}
+
+
+class TerminalFormatter(Formatter):
+    r"""
+    Format tokens with ANSI color sequences, for output in a text console.
+    Color sequences are terminated at newlines, so that paging the output
+    works correctly.
+
+    The `get_style_defs()` method doesn't do anything special since there is
+    no support for common styles.
+
+    Options accepted:
+
+    `bg`
+        Set to ``"light"`` or ``"dark"`` depending on the terminal's background
+        (default: ``"light"``).
+
+    `colorscheme`
+        A dictionary mapping token types to (lightbg, darkbg) color names or
+        ``None`` (default: ``None`` = use builtin colorscheme).
+
+    `linenos`
+        Set to ``True`` to have line numbers on the terminal output as well
+        (default: ``False`` = no line numbers).
+    """
+    name = 'Terminal'
+    aliases = ['terminal', 'console']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+        self.darkbg = get_choice_opt(options, 'bg',
+                                     ['light', 'dark'], 'light') == 'dark'
+        self.colorscheme = options.get('colorscheme', None) or TERMINAL_COLORS
+        self.linenos = options.get('linenos', False)
+        self._lineno = 0
+
+    def format(self, tokensource, outfile):
+        return Formatter.format(self, tokensource, outfile)
+
+    def _write_lineno(self, outfile):
+        self._lineno += 1
+        outfile.write("%s%04d: " % (self._lineno != 1 and '\n' or '', self._lineno))
+
+    def _get_color(self, ttype):
+        # self.colorscheme is a dict containing usually generic types, so we
+        # have to walk the tree of dots.  The base Token type must be a key,
+        # even if it's empty string, as in the default above.
+        colors = self.colorscheme.get(ttype)
+        while colors is None:
+            ttype = ttype.parent
+            colors = self.colorscheme.get(ttype)
+        return colors[self.darkbg]
+
+    def format_unencoded(self, tokensource, outfile):
+        if self.linenos:
+            self._write_lineno(outfile)
+
+        for ttype, value in tokensource:
+            color = self._get_color(ttype)
+
+            for line in value.splitlines(True):
+                if color:
+                    outfile.write(ansiformat(color, line.rstrip('\n')))
+                else:
+                    outfile.write(line.rstrip('\n'))
+                if line.endswith('\n'):
+                    if self.linenos:
+                        self._write_lineno(outfile)
+                    else:
+                        outfile.write('\n')
+
+        if self.linenos:
+            outfile.write("\n")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal256.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal256.py
new file mode 100644
index 0000000..201b3c3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/formatters/terminal256.py
@@ -0,0 +1,338 @@
+"""
+    pygments.formatters.terminal256
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    Formatter for 256-color terminal output with ANSI sequences.
+
+    RGB-to-XTERM color conversion routines adapted from xterm256-conv
+    tool (http://frexx.de/xterm-256-notes/data/xterm256-conv2.tar.bz2)
+    by Wolfgang Frisch.
+
+    Formatter version 1.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+# TODO:
+#  - Options to map style's bold/underline/italic/border attributes
+#    to some ANSI attrbutes (something like 'italic=underline')
+#  - An option to output "style RGB to xterm RGB/index" conversion table
+#  - An option to indicate that we are running in "reverse background"
+#    xterm. This means that default colors are white-on-black, not
+#    black-on-while, so colors like "white background" need to be converted
+#    to "white background, black foreground", etc...
+
+from pip._vendor.pygments.formatter import Formatter
+from pip._vendor.pygments.console import codes
+from pip._vendor.pygments.style import ansicolors
+
+
+__all__ = ['Terminal256Formatter', 'TerminalTrueColorFormatter']
+
+
+class EscapeSequence:
+    def __init__(self, fg=None, bg=None, bold=False, underline=False, italic=False):
+        self.fg = fg
+        self.bg = bg
+        self.bold = bold
+        self.underline = underline
+        self.italic = italic
+
+    def escape(self, attrs):
+        if len(attrs):
+            return "\x1b[" + ";".join(attrs) + "m"
+        return ""
+
+    def color_string(self):
+        attrs = []
+        if self.fg is not None:
+            if self.fg in ansicolors:
+                esc = codes[self.fg.replace('ansi','')]
+                if ';01m' in esc:
+                    self.bold = True
+                # extract fg color code.
+                attrs.append(esc[2:4])
+            else:
+                attrs.extend(("38", "5", "%i" % self.fg))
+        if self.bg is not None:
+            if self.bg in ansicolors:
+                esc = codes[self.bg.replace('ansi','')]
+                # extract fg color code, add 10 for bg.
+                attrs.append(str(int(esc[2:4])+10))
+            else:
+                attrs.extend(("48", "5", "%i" % self.bg))
+        if self.bold:
+            attrs.append("01")
+        if self.underline:
+            attrs.append("04")
+        if self.italic:
+            attrs.append("03")
+        return self.escape(attrs)
+
+    def true_color_string(self):
+        attrs = []
+        if self.fg:
+            attrs.extend(("38", "2", str(self.fg[0]), str(self.fg[1]), str(self.fg[2])))
+        if self.bg:
+            attrs.extend(("48", "2", str(self.bg[0]), str(self.bg[1]), str(self.bg[2])))
+        if self.bold:
+            attrs.append("01")
+        if self.underline:
+            attrs.append("04")
+        if self.italic:
+            attrs.append("03")
+        return self.escape(attrs)
+
+    def reset_string(self):
+        attrs = []
+        if self.fg is not None:
+            attrs.append("39")
+        if self.bg is not None:
+            attrs.append("49")
+        if self.bold or self.underline or self.italic:
+            attrs.append("00")
+        return self.escape(attrs)
+
+
+class Terminal256Formatter(Formatter):
+    """
+    Format tokens with ANSI color sequences, for output in a 256-color
+    terminal or console.  Like in `TerminalFormatter` color sequences
+    are terminated at newlines, so that paging the output works correctly.
+
+    The formatter takes colors from a style defined by the `style` option
+    and converts them to nearest ANSI 256-color escape sequences. Bold and
+    underline attributes from the style are preserved (and displayed).
+
+    .. versionadded:: 0.9
+
+    .. versionchanged:: 2.2
+       If the used style defines foreground colors in the form ``#ansi*``, then
+       `Terminal256Formatter` will map these to non extended foreground color.
+       See :ref:`AnsiTerminalStyle` for more information.
+
+    .. versionchanged:: 2.4
+       The ANSI color names have been updated with names that are easier to
+       understand and align with colornames of other projects and terminals.
+       See :ref:`this table <new-ansi-color-names>` for more information.
+
+
+    Options accepted:
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+
+    `linenos`
+        Set to ``True`` to have line numbers on the terminal output as well
+        (default: ``False`` = no line numbers).
+    """
+    name = 'Terminal256'
+    aliases = ['terminal256', 'console256', '256']
+    filenames = []
+
+    def __init__(self, **options):
+        Formatter.__init__(self, **options)
+
+        self.xterm_colors = []
+        self.best_match = {}
+        self.style_string = {}
+
+        self.usebold = 'nobold' not in options
+        self.useunderline = 'nounderline' not in options
+        self.useitalic = 'noitalic' not in options
+
+        self._build_color_table()  # build an RGB-to-256 color conversion table
+        self._setup_styles()  # convert selected style's colors to term. colors
+
+        self.linenos = options.get('linenos', False)
+        self._lineno = 0
+
+    def _build_color_table(self):
+        # colors 0..15: 16 basic colors
+
+        self.xterm_colors.append((0x00, 0x00, 0x00))  # 0
+        self.xterm_colors.append((0xcd, 0x00, 0x00))  # 1
+        self.xterm_colors.append((0x00, 0xcd, 0x00))  # 2
+        self.xterm_colors.append((0xcd, 0xcd, 0x00))  # 3
+        self.xterm_colors.append((0x00, 0x00, 0xee))  # 4
+        self.xterm_colors.append((0xcd, 0x00, 0xcd))  # 5
+        self.xterm_colors.append((0x00, 0xcd, 0xcd))  # 6
+        self.xterm_colors.append((0xe5, 0xe5, 0xe5))  # 7
+        self.xterm_colors.append((0x7f, 0x7f, 0x7f))  # 8
+        self.xterm_colors.append((0xff, 0x00, 0x00))  # 9
+        self.xterm_colors.append((0x00, 0xff, 0x00))  # 10
+        self.xterm_colors.append((0xff, 0xff, 0x00))  # 11
+        self.xterm_colors.append((0x5c, 0x5c, 0xff))  # 12
+        self.xterm_colors.append((0xff, 0x00, 0xff))  # 13
+        self.xterm_colors.append((0x00, 0xff, 0xff))  # 14
+        self.xterm_colors.append((0xff, 0xff, 0xff))  # 15
+
+        # colors 16..232: the 6x6x6 color cube
+
+        valuerange = (0x00, 0x5f, 0x87, 0xaf, 0xd7, 0xff)
+
+        for i in range(217):
+            r = valuerange[(i // 36) % 6]
+            g = valuerange[(i // 6) % 6]
+            b = valuerange[i % 6]
+            self.xterm_colors.append((r, g, b))
+
+        # colors 233..253: grayscale
+
+        for i in range(1, 22):
+            v = 8 + i * 10
+            self.xterm_colors.append((v, v, v))
+
+    def _closest_color(self, r, g, b):
+        distance = 257*257*3  # "infinity" (>distance from #000000 to #ffffff)
+        match = 0
+
+        for i in range(0, 254):
+            values = self.xterm_colors[i]
+
+            rd = r - values[0]
+            gd = g - values[1]
+            bd = b - values[2]
+            d = rd*rd + gd*gd + bd*bd
+
+            if d < distance:
+                match = i
+                distance = d
+        return match
+
+    def _color_index(self, color):
+        index = self.best_match.get(color, None)
+        if color in ansicolors:
+            # strip the `ansi/#ansi` part and look up code
+            index = color
+            self.best_match[color] = index
+        if index is None:
+            try:
+                rgb = int(str(color), 16)
+            except ValueError:
+                rgb = 0
+
+            r = (rgb >> 16) & 0xff
+            g = (rgb >> 8) & 0xff
+            b = rgb & 0xff
+            index = self._closest_color(r, g, b)
+            self.best_match[color] = index
+        return index
+
+    def _setup_styles(self):
+        for ttype, ndef in self.style:
+            escape = EscapeSequence()
+            # get foreground from ansicolor if set
+            if ndef['ansicolor']:
+                escape.fg = self._color_index(ndef['ansicolor'])
+            elif ndef['color']:
+                escape.fg = self._color_index(ndef['color'])
+            if ndef['bgansicolor']:
+                escape.bg = self._color_index(ndef['bgansicolor'])
+            elif ndef['bgcolor']:
+                escape.bg = self._color_index(ndef['bgcolor'])
+            if self.usebold and ndef['bold']:
+                escape.bold = True
+            if self.useunderline and ndef['underline']:
+                escape.underline = True
+            if self.useitalic and ndef['italic']:
+                escape.italic = True
+            self.style_string[str(ttype)] = (escape.color_string(),
+                                             escape.reset_string())
+
+    def _write_lineno(self, outfile):
+        self._lineno += 1
+        outfile.write("%s%04d: " % (self._lineno != 1 and '\n' or '', self._lineno))
+
+    def format(self, tokensource, outfile):
+        return Formatter.format(self, tokensource, outfile)
+
+    def format_unencoded(self, tokensource, outfile):
+        if self.linenos:
+            self._write_lineno(outfile)
+
+        for ttype, value in tokensource:
+            not_found = True
+            while ttype and not_found:
+                try:
+                    # outfile.write( "<" + str(ttype) + ">" )
+                    on, off = self.style_string[str(ttype)]
+
+                    # Like TerminalFormatter, add "reset colors" escape sequence
+                    # on newline.
+                    spl = value.split('\n')
+                    for line in spl[:-1]:
+                        if line:
+                            outfile.write(on + line + off)
+                        if self.linenos:
+                            self._write_lineno(outfile)
+                        else:
+                            outfile.write('\n')
+
+                    if spl[-1]:
+                        outfile.write(on + spl[-1] + off)
+
+                    not_found = False
+                    # outfile.write( '#' + str(ttype) + '#' )
+
+                except KeyError:
+                    # ottype = ttype
+                    ttype = ttype.parent
+                    # outfile.write( '!' + str(ottype) + '->' + str(ttype) + '!' )
+
+            if not_found:
+                outfile.write(value)
+
+        if self.linenos:
+            outfile.write("\n")
+
+
+
+class TerminalTrueColorFormatter(Terminal256Formatter):
+    r"""
+    Format tokens with ANSI color sequences, for output in a true-color
+    terminal or console.  Like in `TerminalFormatter` color sequences
+    are terminated at newlines, so that paging the output works correctly.
+
+    .. versionadded:: 2.1
+
+    Options accepted:
+
+    `style`
+        The style to use, can be a string or a Style subclass (default:
+        ``'default'``).
+    """
+    name = 'TerminalTrueColor'
+    aliases = ['terminal16m', 'console16m', '16m']
+    filenames = []
+
+    def _build_color_table(self):
+        pass
+
+    def _color_tuple(self, color):
+        try:
+            rgb = int(str(color), 16)
+        except ValueError:
+            return None
+        r = (rgb >> 16) & 0xff
+        g = (rgb >> 8) & 0xff
+        b = rgb & 0xff
+        return (r, g, b)
+
+    def _setup_styles(self):
+        for ttype, ndef in self.style:
+            escape = EscapeSequence()
+            if ndef['color']:
+                escape.fg = self._color_tuple(ndef['color'])
+            if ndef['bgcolor']:
+                escape.bg = self._color_tuple(ndef['bgcolor'])
+            if self.usebold and ndef['bold']:
+                escape.bold = True
+            if self.useunderline and ndef['underline']:
+                escape.underline = True
+            if self.useitalic and ndef['italic']:
+                escape.italic = True
+            self.style_string[str(ttype)] = (escape.true_color_string(),
+                                             escape.reset_string())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexer.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexer.py
new file mode 100644
index 0000000..ec7f4de
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexer.py
@@ -0,0 +1,882 @@
+"""
+    pygments.lexer
+    ~~~~~~~~~~~~~~
+
+    Base lexer classes.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+import sys
+import time
+
+from pip._vendor.pygments.filter import apply_filters, Filter
+from pip._vendor.pygments.filters import get_filter_by_name
+from pip._vendor.pygments.token import Error, Text, Other, _TokenType
+from pip._vendor.pygments.util import get_bool_opt, get_int_opt, get_list_opt, \
+    make_analysator, Future, guess_decode
+from pip._vendor.pygments.regexopt import regex_opt
+
+__all__ = ['Lexer', 'RegexLexer', 'ExtendedRegexLexer', 'DelegatingLexer',
+           'LexerContext', 'include', 'inherit', 'bygroups', 'using', 'this',
+           'default', 'words']
+
+
+_encoding_map = [(b'\xef\xbb\xbf', 'utf-8'),
+                 (b'\xff\xfe\0\0', 'utf-32'),
+                 (b'\0\0\xfe\xff', 'utf-32be'),
+                 (b'\xff\xfe', 'utf-16'),
+                 (b'\xfe\xff', 'utf-16be')]
+
+_default_analyse = staticmethod(lambda x: 0.0)
+
+
+class LexerMeta(type):
+    """
+    This metaclass automagically converts ``analyse_text`` methods into
+    static methods which always return float values.
+    """
+
+    def __new__(mcs, name, bases, d):
+        if 'analyse_text' in d:
+            d['analyse_text'] = make_analysator(d['analyse_text'])
+        return type.__new__(mcs, name, bases, d)
+
+
+class Lexer(metaclass=LexerMeta):
+    """
+    Lexer for a specific language.
+
+    Basic options recognized:
+    ``stripnl``
+        Strip leading and trailing newlines from the input (default: True).
+    ``stripall``
+        Strip all leading and trailing whitespace from the input
+        (default: False).
+    ``ensurenl``
+        Make sure that the input ends with a newline (default: True).  This
+        is required for some lexers that consume input linewise.
+
+        .. versionadded:: 1.3
+
+    ``tabsize``
+        If given and greater than 0, expand tabs in the input (default: 0).
+    ``encoding``
+        If given, must be an encoding name. This encoding will be used to
+        convert the input string to Unicode, if it is not already a Unicode
+        string (default: ``'guess'``, which uses a simple UTF-8 / Locale /
+        Latin1 detection.  Can also be ``'chardet'`` to use the chardet
+        library, if it is installed.
+    ``inencoding``
+        Overrides the ``encoding`` if given.
+    """
+
+    #: Name of the lexer
+    name = None
+
+    #: URL of the language specification/definition
+    url = None
+
+    #: Shortcuts for the lexer
+    aliases = []
+
+    #: File name globs
+    filenames = []
+
+    #: Secondary file name globs
+    alias_filenames = []
+
+    #: MIME types
+    mimetypes = []
+
+    #: Priority, should multiple lexers match and no content is provided
+    priority = 0
+
+    def __init__(self, **options):
+        self.options = options
+        self.stripnl = get_bool_opt(options, 'stripnl', True)
+        self.stripall = get_bool_opt(options, 'stripall', False)
+        self.ensurenl = get_bool_opt(options, 'ensurenl', True)
+        self.tabsize = get_int_opt(options, 'tabsize', 0)
+        self.encoding = options.get('encoding', 'guess')
+        self.encoding = options.get('inencoding') or self.encoding
+        self.filters = []
+        for filter_ in get_list_opt(options, 'filters', ()):
+            self.add_filter(filter_)
+
+    def __repr__(self):
+        if self.options:
+            return '<pygments.lexers.%s with %r>' % (self.__class__.__name__,
+                                                     self.options)
+        else:
+            return '<pygments.lexers.%s>' % self.__class__.__name__
+
+    def add_filter(self, filter_, **options):
+        """
+        Add a new stream filter to this lexer.
+        """
+        if not isinstance(filter_, Filter):
+            filter_ = get_filter_by_name(filter_, **options)
+        self.filters.append(filter_)
+
+    def analyse_text(text):
+        """
+        Has to return a float between ``0`` and ``1`` that indicates
+        if a lexer wants to highlight this text. Used by ``guess_lexer``.
+        If this method returns ``0`` it won't highlight it in any case, if
+        it returns ``1`` highlighting with this lexer is guaranteed.
+
+        The `LexerMeta` metaclass automatically wraps this function so
+        that it works like a static method (no ``self`` or ``cls``
+        parameter) and the return value is automatically converted to
+        `float`. If the return value is an object that is boolean `False`
+        it's the same as if the return values was ``0.0``.
+        """
+
+    def get_tokens(self, text, unfiltered=False):
+        """
+        Return an iterable of (tokentype, value) pairs generated from
+        `text`. If `unfiltered` is set to `True`, the filtering mechanism
+        is bypassed even if filters are defined.
+
+        Also preprocess the text, i.e. expand tabs and strip it if
+        wanted and applies registered filters.
+        """
+        if not isinstance(text, str):
+            if self.encoding == 'guess':
+                text, _ = guess_decode(text)
+            elif self.encoding == 'chardet':
+                try:
+                    from pip._vendor import chardet
+                except ImportError as e:
+                    raise ImportError('To enable chardet encoding guessing, '
+                                      'please install the chardet library '
+                                      'from http://chardet.feedparser.org/') from e
+                # check for BOM first
+                decoded = None
+                for bom, encoding in _encoding_map:
+                    if text.startswith(bom):
+                        decoded = text[len(bom):].decode(encoding, 'replace')
+                        break
+                # no BOM found, so use chardet
+                if decoded is None:
+                    enc = chardet.detect(text[:1024])  # Guess using first 1KB
+                    decoded = text.decode(enc.get('encoding') or 'utf-8',
+                                          'replace')
+                text = decoded
+            else:
+                text = text.decode(self.encoding)
+                if text.startswith('\ufeff'):
+                    text = text[len('\ufeff'):]
+        else:
+            if text.startswith('\ufeff'):
+                text = text[len('\ufeff'):]
+
+        # text now *is* a unicode string
+        text = text.replace('\r\n', '\n')
+        text = text.replace('\r', '\n')
+        if self.stripall:
+            text = text.strip()
+        elif self.stripnl:
+            text = text.strip('\n')
+        if self.tabsize > 0:
+            text = text.expandtabs(self.tabsize)
+        if self.ensurenl and not text.endswith('\n'):
+            text += '\n'
+
+        def streamer():
+            for _, t, v in self.get_tokens_unprocessed(text):
+                yield t, v
+        stream = streamer()
+        if not unfiltered:
+            stream = apply_filters(stream, self.filters, self)
+        return stream
+
+    def get_tokens_unprocessed(self, text):
+        """
+        Return an iterable of (index, tokentype, value) pairs where "index"
+        is the starting position of the token within the input text.
+
+        In subclasses, implement this method as a generator to
+        maximize effectiveness.
+        """
+        raise NotImplementedError
+
+
+class DelegatingLexer(Lexer):
+    """
+    This lexer takes two lexer as arguments. A root lexer and
+    a language lexer. First everything is scanned using the language
+    lexer, afterwards all ``Other`` tokens are lexed using the root
+    lexer.
+
+    The lexers from the ``template`` lexer package use this base lexer.
+    """
+
+    def __init__(self, _root_lexer, _language_lexer, _needle=Other, **options):
+        self.root_lexer = _root_lexer(**options)
+        self.language_lexer = _language_lexer(**options)
+        self.needle = _needle
+        Lexer.__init__(self, **options)
+
+    def get_tokens_unprocessed(self, text):
+        buffered = ''
+        insertions = []
+        lng_buffer = []
+        for i, t, v in self.language_lexer.get_tokens_unprocessed(text):
+            if t is self.needle:
+                if lng_buffer:
+                    insertions.append((len(buffered), lng_buffer))
+                    lng_buffer = []
+                buffered += v
+            else:
+                lng_buffer.append((i, t, v))
+        if lng_buffer:
+            insertions.append((len(buffered), lng_buffer))
+        return do_insertions(insertions,
+                             self.root_lexer.get_tokens_unprocessed(buffered))
+
+
+# ------------------------------------------------------------------------------
+# RegexLexer and ExtendedRegexLexer
+#
+
+
+class include(str):  # pylint: disable=invalid-name
+    """
+    Indicates that a state should include rules from another state.
+    """
+    pass
+
+
+class _inherit:
+    """
+    Indicates the a state should inherit from its superclass.
+    """
+    def __repr__(self):
+        return 'inherit'
+
+inherit = _inherit()  # pylint: disable=invalid-name
+
+
+class combined(tuple):  # pylint: disable=invalid-name
+    """
+    Indicates a state combined from multiple states.
+    """
+
+    def __new__(cls, *args):
+        return tuple.__new__(cls, args)
+
+    def __init__(self, *args):
+        # tuple.__init__ doesn't do anything
+        pass
+
+
+class _PseudoMatch:
+    """
+    A pseudo match object constructed from a string.
+    """
+
+    def __init__(self, start, text):
+        self._text = text
+        self._start = start
+
+    def start(self, arg=None):
+        return self._start
+
+    def end(self, arg=None):
+        return self._start + len(self._text)
+
+    def group(self, arg=None):
+        if arg:
+            raise IndexError('No such group')
+        return self._text
+
+    def groups(self):
+        return (self._text,)
+
+    def groupdict(self):
+        return {}
+
+
+def bygroups(*args):
+    """
+    Callback that yields multiple actions for each group in the match.
+    """
+    def callback(lexer, match, ctx=None):
+        for i, action in enumerate(args):
+            if action is None:
+                continue
+            elif type(action) is _TokenType:
+                data = match.group(i + 1)
+                if data:
+                    yield match.start(i + 1), action, data
+            else:
+                data = match.group(i + 1)
+                if data is not None:
+                    if ctx:
+                        ctx.pos = match.start(i + 1)
+                    for item in action(lexer,
+                                       _PseudoMatch(match.start(i + 1), data), ctx):
+                        if item:
+                            yield item
+        if ctx:
+            ctx.pos = match.end()
+    return callback
+
+
+class _This:
+    """
+    Special singleton used for indicating the caller class.
+    Used by ``using``.
+    """
+
+this = _This()
+
+
+def using(_other, **kwargs):
+    """
+    Callback that processes the match with a different lexer.
+
+    The keyword arguments are forwarded to the lexer, except `state` which
+    is handled separately.
+
+    `state` specifies the state that the new lexer will start in, and can
+    be an enumerable such as ('root', 'inline', 'string') or a simple
+    string which is assumed to be on top of the root state.
+
+    Note: For that to work, `_other` must not be an `ExtendedRegexLexer`.
+    """
+    gt_kwargs = {}
+    if 'state' in kwargs:
+        s = kwargs.pop('state')
+        if isinstance(s, (list, tuple)):
+            gt_kwargs['stack'] = s
+        else:
+            gt_kwargs['stack'] = ('root', s)
+
+    if _other is this:
+        def callback(lexer, match, ctx=None):
+            # if keyword arguments are given the callback
+            # function has to create a new lexer instance
+            if kwargs:
+                # XXX: cache that somehow
+                kwargs.update(lexer.options)
+                lx = lexer.__class__(**kwargs)
+            else:
+                lx = lexer
+            s = match.start()
+            for i, t, v in lx.get_tokens_unprocessed(match.group(), **gt_kwargs):
+                yield i + s, t, v
+            if ctx:
+                ctx.pos = match.end()
+    else:
+        def callback(lexer, match, ctx=None):
+            # XXX: cache that somehow
+            kwargs.update(lexer.options)
+            lx = _other(**kwargs)
+
+            s = match.start()
+            for i, t, v in lx.get_tokens_unprocessed(match.group(), **gt_kwargs):
+                yield i + s, t, v
+            if ctx:
+                ctx.pos = match.end()
+    return callback
+
+
+class default:
+    """
+    Indicates a state or state action (e.g. #pop) to apply.
+    For example default('#pop') is equivalent to ('', Token, '#pop')
+    Note that state tuples may be used as well.
+
+    .. versionadded:: 2.0
+    """
+    def __init__(self, state):
+        self.state = state
+
+
+class words(Future):
+    """
+    Indicates a list of literal words that is transformed into an optimized
+    regex that matches any of the words.
+
+    .. versionadded:: 2.0
+    """
+    def __init__(self, words, prefix='', suffix=''):
+        self.words = words
+        self.prefix = prefix
+        self.suffix = suffix
+
+    def get(self):
+        return regex_opt(self.words, prefix=self.prefix, suffix=self.suffix)
+
+
+class RegexLexerMeta(LexerMeta):
+    """
+    Metaclass for RegexLexer, creates the self._tokens attribute from
+    self.tokens on the first instantiation.
+    """
+
+    def _process_regex(cls, regex, rflags, state):
+        """Preprocess the regular expression component of a token definition."""
+        if isinstance(regex, Future):
+            regex = regex.get()
+        return re.compile(regex, rflags).match
+
+    def _process_token(cls, token):
+        """Preprocess the token component of a token definition."""
+        assert type(token) is _TokenType or callable(token), \
+            'token type must be simple type or callable, not %r' % (token,)
+        return token
+
+    def _process_new_state(cls, new_state, unprocessed, processed):
+        """Preprocess the state transition action of a token definition."""
+        if isinstance(new_state, str):
+            # an existing state
+            if new_state == '#pop':
+                return -1
+            elif new_state in unprocessed:
+                return (new_state,)
+            elif new_state == '#push':
+                return new_state
+            elif new_state[:5] == '#pop:':
+                return -int(new_state[5:])
+            else:
+                assert False, 'unknown new state %r' % new_state
+        elif isinstance(new_state, combined):
+            # combine a new state from existing ones
+            tmp_state = '_tmp_%d' % cls._tmpname
+            cls._tmpname += 1
+            itokens = []
+            for istate in new_state:
+                assert istate != new_state, 'circular state ref %r' % istate
+                itokens.extend(cls._process_state(unprocessed,
+                                                  processed, istate))
+            processed[tmp_state] = itokens
+            return (tmp_state,)
+        elif isinstance(new_state, tuple):
+            # push more than one state
+            for istate in new_state:
+                assert (istate in unprocessed or
+                        istate in ('#pop', '#push')), \
+                    'unknown new state ' + istate
+            return new_state
+        else:
+            assert False, 'unknown new state def %r' % new_state
+
+    def _process_state(cls, unprocessed, processed, state):
+        """Preprocess a single state definition."""
+        assert type(state) is str, "wrong state name %r" % state
+        assert state[0] != '#', "invalid state name %r" % state
+        if state in processed:
+            return processed[state]
+        tokens = processed[state] = []
+        rflags = cls.flags
+        for tdef in unprocessed[state]:
+            if isinstance(tdef, include):
+                # it's a state reference
+                assert tdef != state, "circular state reference %r" % state
+                tokens.extend(cls._process_state(unprocessed, processed,
+                                                 str(tdef)))
+                continue
+            if isinstance(tdef, _inherit):
+                # should be processed already, but may not in the case of:
+                # 1. the state has no counterpart in any parent
+                # 2. the state includes more than one 'inherit'
+                continue
+            if isinstance(tdef, default):
+                new_state = cls._process_new_state(tdef.state, unprocessed, processed)
+                tokens.append((re.compile('').match, None, new_state))
+                continue
+
+            assert type(tdef) is tuple, "wrong rule def %r" % tdef
+
+            try:
+                rex = cls._process_regex(tdef[0], rflags, state)
+            except Exception as err:
+                raise ValueError("uncompilable regex %r in state %r of %r: %s" %
+                                 (tdef[0], state, cls, err)) from err
+
+            token = cls._process_token(tdef[1])
+
+            if len(tdef) == 2:
+                new_state = None
+            else:
+                new_state = cls._process_new_state(tdef[2],
+                                                   unprocessed, processed)
+
+            tokens.append((rex, token, new_state))
+        return tokens
+
+    def process_tokendef(cls, name, tokendefs=None):
+        """Preprocess a dictionary of token definitions."""
+        processed = cls._all_tokens[name] = {}
+        tokendefs = tokendefs or cls.tokens[name]
+        for state in list(tokendefs):
+            cls._process_state(tokendefs, processed, state)
+        return processed
+
+    def get_tokendefs(cls):
+        """
+        Merge tokens from superclasses in MRO order, returning a single tokendef
+        dictionary.
+
+        Any state that is not defined by a subclass will be inherited
+        automatically.  States that *are* defined by subclasses will, by
+        default, override that state in the superclass.  If a subclass wishes to
+        inherit definitions from a superclass, it can use the special value
+        "inherit", which will cause the superclass' state definition to be
+        included at that point in the state.
+        """
+        tokens = {}
+        inheritable = {}
+        for c in cls.__mro__:
+            toks = c.__dict__.get('tokens', {})
+
+            for state, items in toks.items():
+                curitems = tokens.get(state)
+                if curitems is None:
+                    # N.b. because this is assigned by reference, sufficiently
+                    # deep hierarchies are processed incrementally (e.g. for
+                    # A(B), B(C), C(RegexLexer), B will be premodified so X(B)
+                    # will not see any inherits in B).
+                    tokens[state] = items
+                    try:
+                        inherit_ndx = items.index(inherit)
+                    except ValueError:
+                        continue
+                    inheritable[state] = inherit_ndx
+                    continue
+
+                inherit_ndx = inheritable.pop(state, None)
+                if inherit_ndx is None:
+                    continue
+
+                # Replace the "inherit" value with the items
+                curitems[inherit_ndx:inherit_ndx+1] = items
+                try:
+                    # N.b. this is the index in items (that is, the superclass
+                    # copy), so offset required when storing below.
+                    new_inh_ndx = items.index(inherit)
+                except ValueError:
+                    pass
+                else:
+                    inheritable[state] = inherit_ndx + new_inh_ndx
+
+        return tokens
+
+    def __call__(cls, *args, **kwds):
+        """Instantiate cls after preprocessing its token definitions."""
+        if '_tokens' not in cls.__dict__:
+            cls._all_tokens = {}
+            cls._tmpname = 0
+            if hasattr(cls, 'token_variants') and cls.token_variants:
+                # don't process yet
+                pass
+            else:
+                cls._tokens = cls.process_tokendef('', cls.get_tokendefs())
+
+        return type.__call__(cls, *args, **kwds)
+
+
+class RegexLexer(Lexer, metaclass=RegexLexerMeta):
+    """
+    Base for simple stateful regular expression-based lexers.
+    Simplifies the lexing process so that you need only
+    provide a list of states and regular expressions.
+    """
+
+    #: Flags for compiling the regular expressions.
+    #: Defaults to MULTILINE.
+    flags = re.MULTILINE
+
+    #: At all time there is a stack of states. Initially, the stack contains
+    #: a single state 'root'. The top of the stack is called "the current state".
+    #:
+    #: Dict of ``{'state': [(regex, tokentype, new_state), ...], ...}``
+    #:
+    #: ``new_state`` can be omitted to signify no state transition.
+    #: If ``new_state`` is a string, it is pushed on the stack. This ensure
+    #: the new current state is ``new_state``.
+    #: If ``new_state`` is a tuple of strings, all of those strings are pushed
+    #: on the stack and the current state will be the last element of the list.
+    #: ``new_state`` can also be ``combined('state1', 'state2', ...)``
+    #: to signify a new, anonymous state combined from the rules of two
+    #: or more existing ones.
+    #: Furthermore, it can be '#pop' to signify going back one step in
+    #: the state stack, or '#push' to push the current state on the stack
+    #: again. Note that if you push while in a combined state, the combined
+    #: state itself is pushed, and not only the state in which the rule is
+    #: defined.
+    #:
+    #: The tuple can also be replaced with ``include('state')``, in which
+    #: case the rules from the state named by the string are included in the
+    #: current one.
+    tokens = {}
+
+    def get_tokens_unprocessed(self, text, stack=('root',)):
+        """
+        Split ``text`` into (tokentype, text) pairs.
+
+        ``stack`` is the initial stack (default: ``['root']``)
+        """
+        pos = 0
+        tokendefs = self._tokens
+        statestack = list(stack)
+        statetokens = tokendefs[statestack[-1]]
+        while 1:
+            for rexmatch, action, new_state in statetokens:
+                m = rexmatch(text, pos)
+                if m:
+                    if action is not None:
+                        if type(action) is _TokenType:
+                            yield pos, action, m.group()
+                        else:
+                            yield from action(self, m)
+                    pos = m.end()
+                    if new_state is not None:
+                        # state transition
+                        if isinstance(new_state, tuple):
+                            for state in new_state:
+                                if state == '#pop':
+                                    if len(statestack) > 1:
+                                        statestack.pop()
+                                elif state == '#push':
+                                    statestack.append(statestack[-1])
+                                else:
+                                    statestack.append(state)
+                        elif isinstance(new_state, int):
+                            # pop, but keep at least one state on the stack
+                            # (random code leading to unexpected pops should
+                            # not allow exceptions)
+                            if abs(new_state) >= len(statestack):
+                                del statestack[1:]
+                            else:
+                                del statestack[new_state:]
+                        elif new_state == '#push':
+                            statestack.append(statestack[-1])
+                        else:
+                            assert False, "wrong state def: %r" % new_state
+                        statetokens = tokendefs[statestack[-1]]
+                    break
+            else:
+                # We are here only if all state tokens have been considered
+                # and there was not a match on any of them.
+                try:
+                    if text[pos] == '\n':
+                        # at EOL, reset state to "root"
+                        statestack = ['root']
+                        statetokens = tokendefs['root']
+                        yield pos, Text, '\n'
+                        pos += 1
+                        continue
+                    yield pos, Error, text[pos]
+                    pos += 1
+                except IndexError:
+                    break
+
+
+class LexerContext:
+    """
+    A helper object that holds lexer position data.
+    """
+
+    def __init__(self, text, pos, stack=None, end=None):
+        self.text = text
+        self.pos = pos
+        self.end = end or len(text)  # end=0 not supported ;-)
+        self.stack = stack or ['root']
+
+    def __repr__(self):
+        return 'LexerContext(%r, %r, %r)' % (
+            self.text, self.pos, self.stack)
+
+
+class ExtendedRegexLexer(RegexLexer):
+    """
+    A RegexLexer that uses a context object to store its state.
+    """
+
+    def get_tokens_unprocessed(self, text=None, context=None):
+        """
+        Split ``text`` into (tokentype, text) pairs.
+        If ``context`` is given, use this lexer context instead.
+        """
+        tokendefs = self._tokens
+        if not context:
+            ctx = LexerContext(text, 0)
+            statetokens = tokendefs['root']
+        else:
+            ctx = context
+            statetokens = tokendefs[ctx.stack[-1]]
+            text = ctx.text
+        while 1:
+            for rexmatch, action, new_state in statetokens:
+                m = rexmatch(text, ctx.pos, ctx.end)
+                if m:
+                    if action is not None:
+                        if type(action) is _TokenType:
+                            yield ctx.pos, action, m.group()
+                            ctx.pos = m.end()
+                        else:
+                            yield from action(self, m, ctx)
+                            if not new_state:
+                                # altered the state stack?
+                                statetokens = tokendefs[ctx.stack[-1]]
+                    # CAUTION: callback must set ctx.pos!
+                    if new_state is not None:
+                        # state transition
+                        if isinstance(new_state, tuple):
+                            for state in new_state:
+                                if state == '#pop':
+                                    if len(ctx.stack) > 1:
+                                        ctx.stack.pop()
+                                elif state == '#push':
+                                    ctx.stack.append(ctx.stack[-1])
+                                else:
+                                    ctx.stack.append(state)
+                        elif isinstance(new_state, int):
+                            # see RegexLexer for why this check is made
+                            if abs(new_state) >= len(ctx.stack):
+                                del ctx.stack[1:]
+                            else:
+                                del ctx.stack[new_state:]
+                        elif new_state == '#push':
+                            ctx.stack.append(ctx.stack[-1])
+                        else:
+                            assert False, "wrong state def: %r" % new_state
+                        statetokens = tokendefs[ctx.stack[-1]]
+                    break
+            else:
+                try:
+                    if ctx.pos >= ctx.end:
+                        break
+                    if text[ctx.pos] == '\n':
+                        # at EOL, reset state to "root"
+                        ctx.stack = ['root']
+                        statetokens = tokendefs['root']
+                        yield ctx.pos, Text, '\n'
+                        ctx.pos += 1
+                        continue
+                    yield ctx.pos, Error, text[ctx.pos]
+                    ctx.pos += 1
+                except IndexError:
+                    break
+
+
+def do_insertions(insertions, tokens):
+    """
+    Helper for lexers which must combine the results of several
+    sublexers.
+
+    ``insertions`` is a list of ``(index, itokens)`` pairs.
+    Each ``itokens`` iterable should be inserted at position
+    ``index`` into the token stream given by the ``tokens``
+    argument.
+
+    The result is a combined token stream.
+
+    TODO: clean up the code here.
+    """
+    insertions = iter(insertions)
+    try:
+        index, itokens = next(insertions)
+    except StopIteration:
+        # no insertions
+        yield from tokens
+        return
+
+    realpos = None
+    insleft = True
+
+    # iterate over the token stream where we want to insert
+    # the tokens from the insertion list.
+    for i, t, v in tokens:
+        # first iteration. store the position of first item
+        if realpos is None:
+            realpos = i
+        oldi = 0
+        while insleft and i + len(v) >= index:
+            tmpval = v[oldi:index - i]
+            if tmpval:
+                yield realpos, t, tmpval
+                realpos += len(tmpval)
+            for it_index, it_token, it_value in itokens:
+                yield realpos, it_token, it_value
+                realpos += len(it_value)
+            oldi = index - i
+            try:
+                index, itokens = next(insertions)
+            except StopIteration:
+                insleft = False
+                break  # not strictly necessary
+        if oldi < len(v):
+            yield realpos, t, v[oldi:]
+            realpos += len(v) - oldi
+
+    # leftover tokens
+    while insleft:
+        # no normal tokens, set realpos to zero
+        realpos = realpos or 0
+        for p, t, v in itokens:
+            yield realpos, t, v
+            realpos += len(v)
+        try:
+            index, itokens = next(insertions)
+        except StopIteration:
+            insleft = False
+            break  # not strictly necessary
+
+
+class ProfilingRegexLexerMeta(RegexLexerMeta):
+    """Metaclass for ProfilingRegexLexer, collects regex timing info."""
+
+    def _process_regex(cls, regex, rflags, state):
+        if isinstance(regex, words):
+            rex = regex_opt(regex.words, prefix=regex.prefix,
+                            suffix=regex.suffix)
+        else:
+            rex = regex
+        compiled = re.compile(rex, rflags)
+
+        def match_func(text, pos, endpos=sys.maxsize):
+            info = cls._prof_data[-1].setdefault((state, rex), [0, 0.0])
+            t0 = time.time()
+            res = compiled.match(text, pos, endpos)
+            t1 = time.time()
+            info[0] += 1
+            info[1] += t1 - t0
+            return res
+        return match_func
+
+
+class ProfilingRegexLexer(RegexLexer, metaclass=ProfilingRegexLexerMeta):
+    """Drop-in replacement for RegexLexer that does profiling of its regexes."""
+
+    _prof_data = []
+    _prof_sort_index = 4  # defaults to time per call
+
+    def get_tokens_unprocessed(self, text, stack=('root',)):
+        # this needs to be a stack, since using(this) will produce nested calls
+        self.__class__._prof_data.append({})
+        yield from RegexLexer.get_tokens_unprocessed(self, text, stack)
+        rawdata = self.__class__._prof_data.pop()
+        data = sorted(((s, repr(r).strip('u\'').replace('\\\\', '\\')[:65],
+                        n, 1000 * t, 1000 * t / n)
+                       for ((s, r), (n, t)) in rawdata.items()),
+                      key=lambda x: x[self._prof_sort_index],
+                      reverse=True)
+        sum_total = sum(x[3] for x in data)
+
+        print()
+        print('Profiling result for %s lexing %d chars in %.3f ms' %
+              (self.__class__.__name__, len(text), sum_total))
+        print('=' * 110)
+        print('%-20s %-64s ncalls  tottime  percall' % ('state', 'regex'))
+        print('-' * 110)
+        for d in data:
+            print('%-20s %-65s %5d %8.4f %8.4f' % d)
+        print('=' * 110)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/__init__.py
new file mode 100644
index 0000000..ed69f24
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/__init__.py
@@ -0,0 +1,335 @@
+"""
+    pygments.lexers
+    ~~~~~~~~~~~~~~~
+
+    Pygments lexers.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+import sys
+import types
+from fnmatch import fnmatch
+from os.path import basename
+
+from pip._vendor.pygments.lexers._mapping import LEXERS
+from pip._vendor.pygments.modeline import get_filetype_from_buffer
+from pip._vendor.pygments.plugin import find_plugin_lexers
+from pip._vendor.pygments.util import ClassNotFound, guess_decode
+
+COMPAT = {
+    'Python3Lexer': 'PythonLexer',
+    'Python3TracebackLexer': 'PythonTracebackLexer',
+}
+
+__all__ = ['get_lexer_by_name', 'get_lexer_for_filename', 'find_lexer_class',
+           'guess_lexer', 'load_lexer_from_file'] + list(LEXERS) + list(COMPAT)
+
+_lexer_cache = {}
+
+def _load_lexers(module_name):
+    """Load a lexer (and all others in the module too)."""
+    mod = __import__(module_name, None, None, ['__all__'])
+    for lexer_name in mod.__all__:
+        cls = getattr(mod, lexer_name)
+        _lexer_cache[cls.name] = cls
+
+
+def get_all_lexers(plugins=True):
+    """Return a generator of tuples in the form ``(name, aliases,
+    filenames, mimetypes)`` of all know lexers.
+
+    If *plugins* is true (the default), plugin lexers supplied by entrypoints
+    are also returned.  Otherwise, only builtin ones are considered.
+    """
+    for item in LEXERS.values():
+        yield item[1:]
+    if plugins:
+        for lexer in find_plugin_lexers():
+            yield lexer.name, lexer.aliases, lexer.filenames, lexer.mimetypes
+
+
+def find_lexer_class(name):
+    """Lookup a lexer class by name.
+
+    Return None if not found.
+    """
+    if name in _lexer_cache:
+        return _lexer_cache[name]
+    # lookup builtin lexers
+    for module_name, lname, aliases, _, _ in LEXERS.values():
+        if name == lname:
+            _load_lexers(module_name)
+            return _lexer_cache[name]
+    # continue with lexers from setuptools entrypoints
+    for cls in find_plugin_lexers():
+        if cls.name == name:
+            return cls
+
+
+def find_lexer_class_by_name(_alias):
+    """Lookup a lexer class by alias.
+
+    Like `get_lexer_by_name`, but does not instantiate the class.
+
+    .. versionadded:: 2.2
+    """
+    if not _alias:
+        raise ClassNotFound('no lexer for alias %r found' % _alias)
+    # lookup builtin lexers
+    for module_name, name, aliases, _, _ in LEXERS.values():
+        if _alias.lower() in aliases:
+            if name not in _lexer_cache:
+                _load_lexers(module_name)
+            return _lexer_cache[name]
+    # continue with lexers from setuptools entrypoints
+    for cls in find_plugin_lexers():
+        if _alias.lower() in cls.aliases:
+            return cls
+    raise ClassNotFound('no lexer for alias %r found' % _alias)
+
+
+def get_lexer_by_name(_alias, **options):
+    """Get a lexer by an alias.
+
+    Raises ClassNotFound if not found.
+    """
+    if not _alias:
+        raise ClassNotFound('no lexer for alias %r found' % _alias)
+
+    # lookup builtin lexers
+    for module_name, name, aliases, _, _ in LEXERS.values():
+        if _alias.lower() in aliases:
+            if name not in _lexer_cache:
+                _load_lexers(module_name)
+            return _lexer_cache[name](**options)
+    # continue with lexers from setuptools entrypoints
+    for cls in find_plugin_lexers():
+        if _alias.lower() in cls.aliases:
+            return cls(**options)
+    raise ClassNotFound('no lexer for alias %r found' % _alias)
+
+
+def load_lexer_from_file(filename, lexername="CustomLexer", **options):
+    """Load a lexer from a file.
+
+    This method expects a file located relative to the current working
+    directory, which contains a Lexer class. By default, it expects the
+    Lexer to be name CustomLexer; you can specify your own class name
+    as the second argument to this function.
+
+    Users should be very careful with the input, because this method
+    is equivalent to running eval on the input file.
+
+    Raises ClassNotFound if there are any problems importing the Lexer.
+
+    .. versionadded:: 2.2
+    """
+    try:
+        # This empty dict will contain the namespace for the exec'd file
+        custom_namespace = {}
+        with open(filename, 'rb') as f:
+            exec(f.read(), custom_namespace)
+        # Retrieve the class `lexername` from that namespace
+        if lexername not in custom_namespace:
+            raise ClassNotFound('no valid %s class found in %s' %
+                                (lexername, filename))
+        lexer_class = custom_namespace[lexername]
+        # And finally instantiate it with the options
+        return lexer_class(**options)
+    except OSError as err:
+        raise ClassNotFound('cannot read %s: %s' % (filename, err))
+    except ClassNotFound:
+        raise
+    except Exception as err:
+        raise ClassNotFound('error when loading custom lexer: %s' % err)
+
+
+def find_lexer_class_for_filename(_fn, code=None):
+    """Get a lexer for a filename.
+
+    If multiple lexers match the filename pattern, use ``analyse_text()`` to
+    figure out which one is more appropriate.
+
+    Returns None if not found.
+    """
+    matches = []
+    fn = basename(_fn)
+    for modname, name, _, filenames, _ in LEXERS.values():
+        for filename in filenames:
+            if fnmatch(fn, filename):
+                if name not in _lexer_cache:
+                    _load_lexers(modname)
+                matches.append((_lexer_cache[name], filename))
+    for cls in find_plugin_lexers():
+        for filename in cls.filenames:
+            if fnmatch(fn, filename):
+                matches.append((cls, filename))
+
+    if isinstance(code, bytes):
+        # decode it, since all analyse_text functions expect unicode
+        code = guess_decode(code)
+
+    def get_rating(info):
+        cls, filename = info
+        # explicit patterns get a bonus
+        bonus = '*' not in filename and 0.5 or 0
+        # The class _always_ defines analyse_text because it's included in
+        # the Lexer class.  The default implementation returns None which
+        # gets turned into 0.0.  Run scripts/detect_missing_analyse_text.py
+        # to find lexers which need it overridden.
+        if code:
+            return cls.analyse_text(code) + bonus, cls.__name__
+        return cls.priority + bonus, cls.__name__
+
+    if matches:
+        matches.sort(key=get_rating)
+        # print "Possible lexers, after sort:", matches
+        return matches[-1][0]
+
+
+def get_lexer_for_filename(_fn, code=None, **options):
+    """Get a lexer for a filename.
+
+    If multiple lexers match the filename pattern, use ``analyse_text()`` to
+    figure out which one is more appropriate.
+
+    Raises ClassNotFound if not found.
+    """
+    res = find_lexer_class_for_filename(_fn, code)
+    if not res:
+        raise ClassNotFound('no lexer for filename %r found' % _fn)
+    return res(**options)
+
+
+def get_lexer_for_mimetype(_mime, **options):
+    """Get a lexer for a mimetype.
+
+    Raises ClassNotFound if not found.
+    """
+    for modname, name, _, _, mimetypes in LEXERS.values():
+        if _mime in mimetypes:
+            if name not in _lexer_cache:
+                _load_lexers(modname)
+            return _lexer_cache[name](**options)
+    for cls in find_plugin_lexers():
+        if _mime in cls.mimetypes:
+            return cls(**options)
+    raise ClassNotFound('no lexer for mimetype %r found' % _mime)
+
+
+def _iter_lexerclasses(plugins=True):
+    """Return an iterator over all lexer classes."""
+    for key in sorted(LEXERS):
+        module_name, name = LEXERS[key][:2]
+        if name not in _lexer_cache:
+            _load_lexers(module_name)
+        yield _lexer_cache[name]
+    if plugins:
+        yield from find_plugin_lexers()
+
+
+def guess_lexer_for_filename(_fn, _text, **options):
+    """
+    Lookup all lexers that handle those filenames primary (``filenames``)
+    or secondary (``alias_filenames``). Then run a text analysis for those
+    lexers and choose the best result.
+
+    usage::
+
+        >>> from pygments.lexers import guess_lexer_for_filename
+        >>> guess_lexer_for_filename('hello.html', '<%= @foo %>')
+        <pygments.lexers.templates.RhtmlLexer object at 0xb7d2f32c>
+        >>> guess_lexer_for_filename('hello.html', '<h1>{{ title|e }}</h1>')
+        <pygments.lexers.templates.HtmlDjangoLexer object at 0xb7d2f2ac>
+        >>> guess_lexer_for_filename('style.css', 'a { color: <?= $link ?> }')
+        <pygments.lexers.templates.CssPhpLexer object at 0xb7ba518c>
+    """
+    fn = basename(_fn)
+    primary = {}
+    matching_lexers = set()
+    for lexer in _iter_lexerclasses():
+        for filename in lexer.filenames:
+            if fnmatch(fn, filename):
+                matching_lexers.add(lexer)
+                primary[lexer] = True
+        for filename in lexer.alias_filenames:
+            if fnmatch(fn, filename):
+                matching_lexers.add(lexer)
+                primary[lexer] = False
+    if not matching_lexers:
+        raise ClassNotFound('no lexer for filename %r found' % fn)
+    if len(matching_lexers) == 1:
+        return matching_lexers.pop()(**options)
+    result = []
+    for lexer in matching_lexers:
+        rv = lexer.analyse_text(_text)
+        if rv == 1.0:
+            return lexer(**options)
+        result.append((rv, lexer))
+
+    def type_sort(t):
+        # sort by:
+        # - analyse score
+        # - is primary filename pattern?
+        # - priority
+        # - last resort: class name
+        return (t[0], primary[t[1]], t[1].priority, t[1].__name__)
+    result.sort(key=type_sort)
+
+    return result[-1][1](**options)
+
+
+def guess_lexer(_text, **options):
+    """Guess a lexer by strong distinctions in the text (eg, shebang)."""
+
+    if not isinstance(_text, str):
+        inencoding = options.get('inencoding', options.get('encoding'))
+        if inencoding:
+            _text = _text.decode(inencoding or 'utf8')
+        else:
+            _text, _ = guess_decode(_text)
+
+    # try to get a vim modeline first
+    ft = get_filetype_from_buffer(_text)
+
+    if ft is not None:
+        try:
+            return get_lexer_by_name(ft, **options)
+        except ClassNotFound:
+            pass
+
+    best_lexer = [0.0, None]
+    for lexer in _iter_lexerclasses():
+        rv = lexer.analyse_text(_text)
+        if rv == 1.0:
+            return lexer(**options)
+        if rv > best_lexer[0]:
+            best_lexer[:] = (rv, lexer)
+    if not best_lexer[0] or best_lexer[1] is None:
+        raise ClassNotFound('no lexer matching the text found')
+    return best_lexer[1](**options)
+
+
+class _automodule(types.ModuleType):
+    """Automatically import lexers."""
+
+    def __getattr__(self, name):
+        info = LEXERS.get(name)
+        if info:
+            _load_lexers(info[0])
+            cls = _lexer_cache[info[1]]
+            setattr(self, name, cls)
+            return cls
+        if name in COMPAT:
+            return getattr(self, COMPAT[name])
+        raise AttributeError(name)
+
+
+oldmod = sys.modules[__name__]
+newmod = _automodule(__name__)
+newmod.__dict__.update(oldmod.__dict__)
+sys.modules[__name__] = newmod
+del newmod.newmod, newmod.oldmod, newmod.sys, newmod.types
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/__pycache__/__init__.cpython-39.pyc
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/_mapping.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/_mapping.py
new file mode 100644
index 0000000..40dcaa3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/_mapping.py
@@ -0,0 +1,541 @@
+# Automatically generated by scripts/gen_mapfiles.py.
+# DO NOT EDIT BY HAND; run `make mapfiles` instead.
+
+LEXERS = {
+    'ABAPLexer': ('pip._vendor.pygments.lexers.business', 'ABAP', ('abap',), ('*.abap', '*.ABAP'), ('text/x-abap',)),
+    'AMDGPULexer': ('pip._vendor.pygments.lexers.amdgpu', 'AMDGPU', ('amdgpu',), ('*.isa',), ()),
+    'APLLexer': ('pip._vendor.pygments.lexers.apl', 'APL', ('apl',), ('*.apl', '*.aplf', '*.aplo', '*.apln', '*.aplc', '*.apli', '*.dyalog'), ()),
+    'AbnfLexer': ('pip._vendor.pygments.lexers.grammar_notation', 'ABNF', ('abnf',), ('*.abnf',), ('text/x-abnf',)),
+    'ActionScript3Lexer': ('pip._vendor.pygments.lexers.actionscript', 'ActionScript 3', ('actionscript3', 'as3'), ('*.as',), ('application/x-actionscript3', 'text/x-actionscript3', 'text/actionscript3')),
+    'ActionScriptLexer': ('pip._vendor.pygments.lexers.actionscript', 'ActionScript', ('actionscript', 'as'), ('*.as',), ('application/x-actionscript', 'text/x-actionscript', 'text/actionscript')),
+    'AdaLexer': ('pip._vendor.pygments.lexers.ada', 'Ada', ('ada', 'ada95', 'ada2005'), ('*.adb', '*.ads', '*.ada'), ('text/x-ada',)),
+    'AdlLexer': ('pip._vendor.pygments.lexers.archetype', 'ADL', ('adl',), ('*.adl', '*.adls', '*.adlf', '*.adlx'), ()),
+    'AgdaLexer': ('pip._vendor.pygments.lexers.haskell', 'Agda', ('agda',), ('*.agda',), ('text/x-agda',)),
+    'AheuiLexer': ('pip._vendor.pygments.lexers.esoteric', 'Aheui', ('aheui',), ('*.aheui',), ()),
+    'AlloyLexer': ('pip._vendor.pygments.lexers.dsls', 'Alloy', ('alloy',), ('*.als',), ('text/x-alloy',)),
+    'AmbientTalkLexer': ('pip._vendor.pygments.lexers.ambient', 'AmbientTalk', ('ambienttalk', 'ambienttalk/2', 'at'), ('*.at',), ('text/x-ambienttalk',)),
+    'AmplLexer': ('pip._vendor.pygments.lexers.ampl', 'Ampl', ('ampl',), ('*.run',), ()),
+    'Angular2HtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML + Angular2', ('html+ng2',), ('*.ng2',), ()),
+    'Angular2Lexer': ('pip._vendor.pygments.lexers.templates', 'Angular2', ('ng2',), (), ()),
+    'AntlrActionScriptLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With ActionScript Target', ('antlr-actionscript', 'antlr-as'), ('*.G', '*.g'), ()),
+    'AntlrCSharpLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With C# Target', ('antlr-csharp', 'antlr-c#'), ('*.G', '*.g'), ()),
+    'AntlrCppLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With CPP Target', ('antlr-cpp',), ('*.G', '*.g'), ()),
+    'AntlrJavaLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With Java Target', ('antlr-java',), ('*.G', '*.g'), ()),
+    'AntlrLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR', ('antlr',), (), ()),
+    'AntlrObjectiveCLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With ObjectiveC Target', ('antlr-objc',), ('*.G', '*.g'), ()),
+    'AntlrPerlLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With Perl Target', ('antlr-perl',), ('*.G', '*.g'), ()),
+    'AntlrPythonLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With Python Target', ('antlr-python',), ('*.G', '*.g'), ()),
+    'AntlrRubyLexer': ('pip._vendor.pygments.lexers.parsers', 'ANTLR With Ruby Target', ('antlr-ruby', 'antlr-rb'), ('*.G', '*.g'), ()),
+    'ApacheConfLexer': ('pip._vendor.pygments.lexers.configs', 'ApacheConf', ('apacheconf', 'aconf', 'apache'), ('.htaccess', 'apache.conf', 'apache2.conf'), ('text/x-apacheconf',)),
+    'AppleScriptLexer': ('pip._vendor.pygments.lexers.scripting', 'AppleScript', ('applescript',), ('*.applescript',), ()),
+    'ArduinoLexer': ('pip._vendor.pygments.lexers.c_like', 'Arduino', ('arduino',), ('*.ino',), ('text/x-arduino',)),
+    'ArrowLexer': ('pip._vendor.pygments.lexers.arrow', 'Arrow', ('arrow',), ('*.arw',), ()),
+    'AscLexer': ('pip._vendor.pygments.lexers.asc', 'ASCII armored', ('asc', 'pem'), ('*.asc', '*.pem', 'id_dsa', 'id_ecdsa', 'id_ecdsa_sk', 'id_ed25519', 'id_ed25519_sk', 'id_rsa'), ('application/pgp-keys', 'application/pgp-encrypted', 'application/pgp-signature')),
+    'AspectJLexer': ('pip._vendor.pygments.lexers.jvm', 'AspectJ', ('aspectj',), ('*.aj',), ('text/x-aspectj',)),
+    'AsymptoteLexer': ('pip._vendor.pygments.lexers.graphics', 'Asymptote', ('asymptote', 'asy'), ('*.asy',), ('text/x-asymptote',)),
+    'AugeasLexer': ('pip._vendor.pygments.lexers.configs', 'Augeas', ('augeas',), ('*.aug',), ()),
+    'AutoItLexer': ('pip._vendor.pygments.lexers.automation', 'AutoIt', ('autoit',), ('*.au3',), ('text/x-autoit',)),
+    'AutohotkeyLexer': ('pip._vendor.pygments.lexers.automation', 'autohotkey', ('autohotkey', 'ahk'), ('*.ahk', '*.ahkl'), ('text/x-autohotkey',)),
+    'AwkLexer': ('pip._vendor.pygments.lexers.textedit', 'Awk', ('awk', 'gawk', 'mawk', 'nawk'), ('*.awk',), ('application/x-awk',)),
+    'BBCBasicLexer': ('pip._vendor.pygments.lexers.basic', 'BBC Basic', ('bbcbasic',), ('*.bbc',), ()),
+    'BBCodeLexer': ('pip._vendor.pygments.lexers.markup', 'BBCode', ('bbcode',), (), ('text/x-bbcode',)),
+    'BCLexer': ('pip._vendor.pygments.lexers.algebra', 'BC', ('bc',), ('*.bc',), ()),
+    'BSTLexer': ('pip._vendor.pygments.lexers.bibtex', 'BST', ('bst', 'bst-pybtex'), ('*.bst',), ()),
+    'BareLexer': ('pip._vendor.pygments.lexers.bare', 'BARE', ('bare',), ('*.bare',), ()),
+    'BaseMakefileLexer': ('pip._vendor.pygments.lexers.make', 'Base Makefile', ('basemake',), (), ()),
+    'BashLexer': ('pip._vendor.pygments.lexers.shell', 'Bash', ('bash', 'sh', 'ksh', 'zsh', 'shell'), ('*.sh', '*.ksh', '*.bash', '*.ebuild', '*.eclass', '*.exheres-0', '*.exlib', '*.zsh', '.bashrc', 'bashrc', '.bash_*', 'bash_*', 'zshrc', '.zshrc', '.kshrc', 'kshrc', 'PKGBUILD'), ('application/x-sh', 'application/x-shellscript', 'text/x-shellscript')),
+    'BashSessionLexer': ('pip._vendor.pygments.lexers.shell', 'Bash Session', ('console', 'shell-session'), ('*.sh-session', '*.shell-session'), ('application/x-shell-session', 'application/x-sh-session')),
+    'BatchLexer': ('pip._vendor.pygments.lexers.shell', 'Batchfile', ('batch', 'bat', 'dosbatch', 'winbatch'), ('*.bat', '*.cmd'), ('application/x-dos-batch',)),
+    'BddLexer': ('pip._vendor.pygments.lexers.bdd', 'Bdd', ('bdd',), ('*.feature',), ('text/x-bdd',)),
+    'BefungeLexer': ('pip._vendor.pygments.lexers.esoteric', 'Befunge', ('befunge',), ('*.befunge',), ('application/x-befunge',)),
+    'BerryLexer': ('pip._vendor.pygments.lexers.berry', 'Berry', ('berry', 'be'), ('*.be',), ('text/x-berry', 'application/x-berry')),
+    'BibTeXLexer': ('pip._vendor.pygments.lexers.bibtex', 'BibTeX', ('bibtex', 'bib'), ('*.bib',), ('text/x-bibtex',)),
+    'BlitzBasicLexer': ('pip._vendor.pygments.lexers.basic', 'BlitzBasic', ('blitzbasic', 'b3d', 'bplus'), ('*.bb', '*.decls'), ('text/x-bb',)),
+    'BlitzMaxLexer': ('pip._vendor.pygments.lexers.basic', 'BlitzMax', ('blitzmax', 'bmax'), ('*.bmx',), ('text/x-bmx',)),
+    'BnfLexer': ('pip._vendor.pygments.lexers.grammar_notation', 'BNF', ('bnf',), ('*.bnf',), ('text/x-bnf',)),
+    'BoaLexer': ('pip._vendor.pygments.lexers.boa', 'Boa', ('boa',), ('*.boa',), ()),
+    'BooLexer': ('pip._vendor.pygments.lexers.dotnet', 'Boo', ('boo',), ('*.boo',), ('text/x-boo',)),
+    'BoogieLexer': ('pip._vendor.pygments.lexers.verification', 'Boogie', ('boogie',), ('*.bpl',), ()),
+    'BrainfuckLexer': ('pip._vendor.pygments.lexers.esoteric', 'Brainfuck', ('brainfuck', 'bf'), ('*.bf', '*.b'), ('application/x-brainfuck',)),
+    'BugsLexer': ('pip._vendor.pygments.lexers.modeling', 'BUGS', ('bugs', 'winbugs', 'openbugs'), ('*.bug',), ()),
+    'CAmkESLexer': ('pip._vendor.pygments.lexers.esoteric', 'CAmkES', ('camkes', 'idl4'), ('*.camkes', '*.idl4'), ()),
+    'CLexer': ('pip._vendor.pygments.lexers.c_cpp', 'C', ('c',), ('*.c', '*.h', '*.idc', '*.x[bp]m'), ('text/x-chdr', 'text/x-csrc', 'image/x-xbitmap', 'image/x-xpixmap')),
+    'CMakeLexer': ('pip._vendor.pygments.lexers.make', 'CMake', ('cmake',), ('*.cmake', 'CMakeLists.txt'), ('text/x-cmake',)),
+    'CObjdumpLexer': ('pip._vendor.pygments.lexers.asm', 'c-objdump', ('c-objdump',), ('*.c-objdump',), ('text/x-c-objdump',)),
+    'CPSALexer': ('pip._vendor.pygments.lexers.lisp', 'CPSA', ('cpsa',), ('*.cpsa',), ()),
+    'CSSUL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'CSS+UL4', ('css+ul4',), ('*.cssul4',), ()),
+    'CSharpAspxLexer': ('pip._vendor.pygments.lexers.dotnet', 'aspx-cs', ('aspx-cs',), ('*.aspx', '*.asax', '*.ascx', '*.ashx', '*.asmx', '*.axd'), ()),
+    'CSharpLexer': ('pip._vendor.pygments.lexers.dotnet', 'C#', ('csharp', 'c#', 'cs'), ('*.cs',), ('text/x-csharp',)),
+    'Ca65Lexer': ('pip._vendor.pygments.lexers.asm', 'ca65 assembler', ('ca65',), ('*.s',), ()),
+    'CadlLexer': ('pip._vendor.pygments.lexers.archetype', 'cADL', ('cadl',), ('*.cadl',), ()),
+    'CapDLLexer': ('pip._vendor.pygments.lexers.esoteric', 'CapDL', ('capdl',), ('*.cdl',), ()),
+    'CapnProtoLexer': ('pip._vendor.pygments.lexers.capnproto', "Cap'n Proto", ('capnp',), ('*.capnp',), ()),
+    'CbmBasicV2Lexer': ('pip._vendor.pygments.lexers.basic', 'CBM BASIC V2', ('cbmbas',), ('*.bas',), ()),
+    'CddlLexer': ('pip._vendor.pygments.lexers.cddl', 'CDDL', ('cddl',), ('*.cddl',), ('text/x-cddl',)),
+    'CeylonLexer': ('pip._vendor.pygments.lexers.jvm', 'Ceylon', ('ceylon',), ('*.ceylon',), ('text/x-ceylon',)),
+    'Cfengine3Lexer': ('pip._vendor.pygments.lexers.configs', 'CFEngine3', ('cfengine3', 'cf3'), ('*.cf',), ()),
+    'ChaiscriptLexer': ('pip._vendor.pygments.lexers.scripting', 'ChaiScript', ('chaiscript', 'chai'), ('*.chai',), ('text/x-chaiscript', 'application/x-chaiscript')),
+    'ChapelLexer': ('pip._vendor.pygments.lexers.chapel', 'Chapel', ('chapel', 'chpl'), ('*.chpl',), ()),
+    'CharmciLexer': ('pip._vendor.pygments.lexers.c_like', 'Charmci', ('charmci',), ('*.ci',), ()),
+    'CheetahHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Cheetah', ('html+cheetah', 'html+spitfire', 'htmlcheetah'), (), ('text/html+cheetah', 'text/html+spitfire')),
+    'CheetahJavascriptLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Cheetah', ('javascript+cheetah', 'js+cheetah', 'javascript+spitfire', 'js+spitfire'), (), ('application/x-javascript+cheetah', 'text/x-javascript+cheetah', 'text/javascript+cheetah', 'application/x-javascript+spitfire', 'text/x-javascript+spitfire', 'text/javascript+spitfire')),
+    'CheetahLexer': ('pip._vendor.pygments.lexers.templates', 'Cheetah', ('cheetah', 'spitfire'), ('*.tmpl', '*.spt'), ('application/x-cheetah', 'application/x-spitfire')),
+    'CheetahXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Cheetah', ('xml+cheetah', 'xml+spitfire'), (), ('application/xml+cheetah', 'application/xml+spitfire')),
+    'CirruLexer': ('pip._vendor.pygments.lexers.webmisc', 'Cirru', ('cirru',), ('*.cirru',), ('text/x-cirru',)),
+    'ClayLexer': ('pip._vendor.pygments.lexers.c_like', 'Clay', ('clay',), ('*.clay',), ('text/x-clay',)),
+    'CleanLexer': ('pip._vendor.pygments.lexers.clean', 'Clean', ('clean',), ('*.icl', '*.dcl'), ()),
+    'ClojureLexer': ('pip._vendor.pygments.lexers.jvm', 'Clojure', ('clojure', 'clj'), ('*.clj', '*.cljc'), ('text/x-clojure', 'application/x-clojure')),
+    'ClojureScriptLexer': ('pip._vendor.pygments.lexers.jvm', 'ClojureScript', ('clojurescript', 'cljs'), ('*.cljs',), ('text/x-clojurescript', 'application/x-clojurescript')),
+    'CobolFreeformatLexer': ('pip._vendor.pygments.lexers.business', 'COBOLFree', ('cobolfree',), ('*.cbl', '*.CBL'), ()),
+    'CobolLexer': ('pip._vendor.pygments.lexers.business', 'COBOL', ('cobol',), ('*.cob', '*.COB', '*.cpy', '*.CPY'), ('text/x-cobol',)),
+    'CoffeeScriptLexer': ('pip._vendor.pygments.lexers.javascript', 'CoffeeScript', ('coffeescript', 'coffee-script', 'coffee'), ('*.coffee',), ('text/coffeescript',)),
+    'ColdfusionCFCLexer': ('pip._vendor.pygments.lexers.templates', 'Coldfusion CFC', ('cfc',), ('*.cfc',), ()),
+    'ColdfusionHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'Coldfusion HTML', ('cfm',), ('*.cfm', '*.cfml'), ('application/x-coldfusion',)),
+    'ColdfusionLexer': ('pip._vendor.pygments.lexers.templates', 'cfstatement', ('cfs',), (), ()),
+    'Comal80Lexer': ('pip._vendor.pygments.lexers.comal', 'COMAL-80', ('comal', 'comal80'), ('*.cml', '*.comal'), ()),
+    'CommonLispLexer': ('pip._vendor.pygments.lexers.lisp', 'Common Lisp', ('common-lisp', 'cl', 'lisp'), ('*.cl', '*.lisp'), ('text/x-common-lisp',)),
+    'ComponentPascalLexer': ('pip._vendor.pygments.lexers.oberon', 'Component Pascal', ('componentpascal', 'cp'), ('*.cp', '*.cps'), ('text/x-component-pascal',)),
+    'CoqLexer': ('pip._vendor.pygments.lexers.theorem', 'Coq', ('coq',), ('*.v',), ('text/x-coq',)),
+    'CplintLexer': ('pip._vendor.pygments.lexers.cplint', 'cplint', ('cplint',), ('*.ecl', '*.prolog', '*.pro', '*.pl', '*.P', '*.lpad', '*.cpl'), ('text/x-cplint',)),
+    'CppLexer': ('pip._vendor.pygments.lexers.c_cpp', 'C++', ('cpp', 'c++'), ('*.cpp', '*.hpp', '*.c++', '*.h++', '*.cc', '*.hh', '*.cxx', '*.hxx', '*.C', '*.H', '*.cp', '*.CPP', '*.tpp'), ('text/x-c++hdr', 'text/x-c++src')),
+    'CppObjdumpLexer': ('pip._vendor.pygments.lexers.asm', 'cpp-objdump', ('cpp-objdump', 'c++-objdumb', 'cxx-objdump'), ('*.cpp-objdump', '*.c++-objdump', '*.cxx-objdump'), ('text/x-cpp-objdump',)),
+    'CrmshLexer': ('pip._vendor.pygments.lexers.dsls', 'Crmsh', ('crmsh', 'pcmk'), ('*.crmsh', '*.pcmk'), ()),
+    'CrocLexer': ('pip._vendor.pygments.lexers.d', 'Croc', ('croc',), ('*.croc',), ('text/x-crocsrc',)),
+    'CryptolLexer': ('pip._vendor.pygments.lexers.haskell', 'Cryptol', ('cryptol', 'cry'), ('*.cry',), ('text/x-cryptol',)),
+    'CrystalLexer': ('pip._vendor.pygments.lexers.crystal', 'Crystal', ('cr', 'crystal'), ('*.cr',), ('text/x-crystal',)),
+    'CsoundDocumentLexer': ('pip._vendor.pygments.lexers.csound', 'Csound Document', ('csound-document', 'csound-csd'), ('*.csd',), ()),
+    'CsoundOrchestraLexer': ('pip._vendor.pygments.lexers.csound', 'Csound Orchestra', ('csound', 'csound-orc'), ('*.orc', '*.udo'), ()),
+    'CsoundScoreLexer': ('pip._vendor.pygments.lexers.csound', 'Csound Score', ('csound-score', 'csound-sco'), ('*.sco',), ()),
+    'CssDjangoLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Django/Jinja', ('css+django', 'css+jinja'), ('*.css.j2', '*.css.jinja2'), ('text/css+django', 'text/css+jinja')),
+    'CssErbLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Ruby', ('css+ruby', 'css+erb'), (), ('text/css+ruby',)),
+    'CssGenshiLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Genshi Text', ('css+genshitext', 'css+genshi'), (), ('text/css+genshi',)),
+    'CssLexer': ('pip._vendor.pygments.lexers.css', 'CSS', ('css',), ('*.css',), ('text/css',)),
+    'CssPhpLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+PHP', ('css+php',), (), ('text/css+php',)),
+    'CssSmartyLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Smarty', ('css+smarty',), (), ('text/css+smarty',)),
+    'CudaLexer': ('pip._vendor.pygments.lexers.c_like', 'CUDA', ('cuda', 'cu'), ('*.cu', '*.cuh'), ('text/x-cuda',)),
+    'CypherLexer': ('pip._vendor.pygments.lexers.graph', 'Cypher', ('cypher',), ('*.cyp', '*.cypher'), ()),
+    'CythonLexer': ('pip._vendor.pygments.lexers.python', 'Cython', ('cython', 'pyx', 'pyrex'), ('*.pyx', '*.pxd', '*.pxi'), ('text/x-cython', 'application/x-cython')),
+    'DLexer': ('pip._vendor.pygments.lexers.d', 'D', ('d',), ('*.d', '*.di'), ('text/x-dsrc',)),
+    'DObjdumpLexer': ('pip._vendor.pygments.lexers.asm', 'd-objdump', ('d-objdump',), ('*.d-objdump',), ('text/x-d-objdump',)),
+    'DarcsPatchLexer': ('pip._vendor.pygments.lexers.diff', 'Darcs Patch', ('dpatch',), ('*.dpatch', '*.darcspatch'), ()),
+    'DartLexer': ('pip._vendor.pygments.lexers.javascript', 'Dart', ('dart',), ('*.dart',), ('text/x-dart',)),
+    'Dasm16Lexer': ('pip._vendor.pygments.lexers.asm', 'DASM16', ('dasm16',), ('*.dasm16', '*.dasm'), ('text/x-dasm16',)),
+    'DebianControlLexer': ('pip._vendor.pygments.lexers.installers', 'Debian Control file', ('debcontrol', 'control'), ('control',), ()),
+    'DelphiLexer': ('pip._vendor.pygments.lexers.pascal', 'Delphi', ('delphi', 'pas', 'pascal', 'objectpascal'), ('*.pas', '*.dpr'), ('text/x-pascal',)),
+    'DevicetreeLexer': ('pip._vendor.pygments.lexers.devicetree', 'Devicetree', ('devicetree', 'dts'), ('*.dts', '*.dtsi'), ('text/x-c',)),
+    'DgLexer': ('pip._vendor.pygments.lexers.python', 'dg', ('dg',), ('*.dg',), ('text/x-dg',)),
+    'DiffLexer': ('pip._vendor.pygments.lexers.diff', 'Diff', ('diff', 'udiff'), ('*.diff', '*.patch'), ('text/x-diff', 'text/x-patch')),
+    'DjangoLexer': ('pip._vendor.pygments.lexers.templates', 'Django/Jinja', ('django', 'jinja'), (), ('application/x-django-templating', 'application/x-jinja')),
+    'DockerLexer': ('pip._vendor.pygments.lexers.configs', 'Docker', ('docker', 'dockerfile'), ('Dockerfile', '*.docker'), ('text/x-dockerfile-config',)),
+    'DtdLexer': ('pip._vendor.pygments.lexers.html', 'DTD', ('dtd',), ('*.dtd',), ('application/xml-dtd',)),
+    'DuelLexer': ('pip._vendor.pygments.lexers.webmisc', 'Duel', ('duel', 'jbst', 'jsonml+bst'), ('*.duel', '*.jbst'), ('text/x-duel', 'text/x-jbst')),
+    'DylanConsoleLexer': ('pip._vendor.pygments.lexers.dylan', 'Dylan session', ('dylan-console', 'dylan-repl'), ('*.dylan-console',), ('text/x-dylan-console',)),
+    'DylanLexer': ('pip._vendor.pygments.lexers.dylan', 'Dylan', ('dylan',), ('*.dylan', '*.dyl', '*.intr'), ('text/x-dylan',)),
+    'DylanLidLexer': ('pip._vendor.pygments.lexers.dylan', 'DylanLID', ('dylan-lid', 'lid'), ('*.lid', '*.hdp'), ('text/x-dylan-lid',)),
+    'ECLLexer': ('pip._vendor.pygments.lexers.ecl', 'ECL', ('ecl',), ('*.ecl',), ('application/x-ecl',)),
+    'ECLexer': ('pip._vendor.pygments.lexers.c_like', 'eC', ('ec',), ('*.ec', '*.eh'), ('text/x-echdr', 'text/x-ecsrc')),
+    'EarlGreyLexer': ('pip._vendor.pygments.lexers.javascript', 'Earl Grey', ('earl-grey', 'earlgrey', 'eg'), ('*.eg',), ('text/x-earl-grey',)),
+    'EasytrieveLexer': ('pip._vendor.pygments.lexers.scripting', 'Easytrieve', ('easytrieve',), ('*.ezt', '*.mac'), ('text/x-easytrieve',)),
+    'EbnfLexer': ('pip._vendor.pygments.lexers.parsers', 'EBNF', ('ebnf',), ('*.ebnf',), ('text/x-ebnf',)),
+    'EiffelLexer': ('pip._vendor.pygments.lexers.eiffel', 'Eiffel', ('eiffel',), ('*.e',), ('text/x-eiffel',)),
+    'ElixirConsoleLexer': ('pip._vendor.pygments.lexers.erlang', 'Elixir iex session', ('iex',), (), ('text/x-elixir-shellsession',)),
+    'ElixirLexer': ('pip._vendor.pygments.lexers.erlang', 'Elixir', ('elixir', 'ex', 'exs'), ('*.ex', '*.eex', '*.exs', '*.leex'), ('text/x-elixir',)),
+    'ElmLexer': ('pip._vendor.pygments.lexers.elm', 'Elm', ('elm',), ('*.elm',), ('text/x-elm',)),
+    'ElpiLexer': ('pip._vendor.pygments.lexers.elpi', 'Elpi', ('elpi',), ('*.elpi',), ('text/x-elpi',)),
+    'EmacsLispLexer': ('pip._vendor.pygments.lexers.lisp', 'EmacsLisp', ('emacs-lisp', 'elisp', 'emacs'), ('*.el',), ('text/x-elisp', 'application/x-elisp')),
+    'EmailLexer': ('pip._vendor.pygments.lexers.email', 'E-mail', ('email', 'eml'), ('*.eml',), ('message/rfc822',)),
+    'ErbLexer': ('pip._vendor.pygments.lexers.templates', 'ERB', ('erb',), (), ('application/x-ruby-templating',)),
+    'ErlangLexer': ('pip._vendor.pygments.lexers.erlang', 'Erlang', ('erlang',), ('*.erl', '*.hrl', '*.es', '*.escript'), ('text/x-erlang',)),
+    'ErlangShellLexer': ('pip._vendor.pygments.lexers.erlang', 'Erlang erl session', ('erl',), ('*.erl-sh',), ('text/x-erl-shellsession',)),
+    'EvoqueHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Evoque', ('html+evoque',), ('*.html',), ('text/html+evoque',)),
+    'EvoqueLexer': ('pip._vendor.pygments.lexers.templates', 'Evoque', ('evoque',), ('*.evoque',), ('application/x-evoque',)),
+    'EvoqueXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Evoque', ('xml+evoque',), ('*.xml',), ('application/xml+evoque',)),
+    'ExeclineLexer': ('pip._vendor.pygments.lexers.shell', 'execline', ('execline',), ('*.exec',), ()),
+    'EzhilLexer': ('pip._vendor.pygments.lexers.ezhil', 'Ezhil', ('ezhil',), ('*.n',), ('text/x-ezhil',)),
+    'FSharpLexer': ('pip._vendor.pygments.lexers.dotnet', 'F#', ('fsharp', 'f#'), ('*.fs', '*.fsi'), ('text/x-fsharp',)),
+    'FStarLexer': ('pip._vendor.pygments.lexers.ml', 'FStar', ('fstar',), ('*.fst', '*.fsti'), ('text/x-fstar',)),
+    'FactorLexer': ('pip._vendor.pygments.lexers.factor', 'Factor', ('factor',), ('*.factor',), ('text/x-factor',)),
+    'FancyLexer': ('pip._vendor.pygments.lexers.ruby', 'Fancy', ('fancy', 'fy'), ('*.fy', '*.fancypack'), ('text/x-fancysrc',)),
+    'FantomLexer': ('pip._vendor.pygments.lexers.fantom', 'Fantom', ('fan',), ('*.fan',), ('application/x-fantom',)),
+    'FelixLexer': ('pip._vendor.pygments.lexers.felix', 'Felix', ('felix', 'flx'), ('*.flx', '*.flxh'), ('text/x-felix',)),
+    'FennelLexer': ('pip._vendor.pygments.lexers.lisp', 'Fennel', ('fennel', 'fnl'), ('*.fnl',), ()),
+    'FishShellLexer': ('pip._vendor.pygments.lexers.shell', 'Fish', ('fish', 'fishshell'), ('*.fish', '*.load'), ('application/x-fish',)),
+    'FlatlineLexer': ('pip._vendor.pygments.lexers.dsls', 'Flatline', ('flatline',), (), ('text/x-flatline',)),
+    'FloScriptLexer': ('pip._vendor.pygments.lexers.floscript', 'FloScript', ('floscript', 'flo'), ('*.flo',), ()),
+    'ForthLexer': ('pip._vendor.pygments.lexers.forth', 'Forth', ('forth',), ('*.frt', '*.fs'), ('application/x-forth',)),
+    'FortranFixedLexer': ('pip._vendor.pygments.lexers.fortran', 'FortranFixed', ('fortranfixed',), ('*.f', '*.F'), ()),
+    'FortranLexer': ('pip._vendor.pygments.lexers.fortran', 'Fortran', ('fortran', 'f90'), ('*.f03', '*.f90', '*.F03', '*.F90'), ('text/x-fortran',)),
+    'FoxProLexer': ('pip._vendor.pygments.lexers.foxpro', 'FoxPro', ('foxpro', 'vfp', 'clipper', 'xbase'), ('*.PRG', '*.prg'), ()),
+    'FreeFemLexer': ('pip._vendor.pygments.lexers.freefem', 'Freefem', ('freefem',), ('*.edp',), ('text/x-freefem',)),
+    'FutharkLexer': ('pip._vendor.pygments.lexers.futhark', 'Futhark', ('futhark',), ('*.fut',), ('text/x-futhark',)),
+    'GAPLexer': ('pip._vendor.pygments.lexers.algebra', 'GAP', ('gap',), ('*.g', '*.gd', '*.gi', '*.gap'), ()),
+    'GDScriptLexer': ('pip._vendor.pygments.lexers.gdscript', 'GDScript', ('gdscript', 'gd'), ('*.gd',), ('text/x-gdscript', 'application/x-gdscript')),
+    'GLShaderLexer': ('pip._vendor.pygments.lexers.graphics', 'GLSL', ('glsl',), ('*.vert', '*.frag', '*.geo'), ('text/x-glslsrc',)),
+    'GSQLLexer': ('pip._vendor.pygments.lexers.gsql', 'GSQL', ('gsql',), ('*.gsql',), ()),
+    'GasLexer': ('pip._vendor.pygments.lexers.asm', 'GAS', ('gas', 'asm'), ('*.s', '*.S'), ('text/x-gas',)),
+    'GcodeLexer': ('pip._vendor.pygments.lexers.gcodelexer', 'g-code', ('gcode',), ('*.gcode',), ()),
+    'GenshiLexer': ('pip._vendor.pygments.lexers.templates', 'Genshi', ('genshi', 'kid', 'xml+genshi', 'xml+kid'), ('*.kid',), ('application/x-genshi', 'application/x-kid')),
+    'GenshiTextLexer': ('pip._vendor.pygments.lexers.templates', 'Genshi Text', ('genshitext',), (), ('application/x-genshi-text', 'text/x-genshi')),
+    'GettextLexer': ('pip._vendor.pygments.lexers.textfmts', 'Gettext Catalog', ('pot', 'po'), ('*.pot', '*.po'), ('application/x-gettext', 'text/x-gettext', 'text/gettext')),
+    'GherkinLexer': ('pip._vendor.pygments.lexers.testing', 'Gherkin', ('gherkin', 'cucumber'), ('*.feature',), ('text/x-gherkin',)),
+    'GnuplotLexer': ('pip._vendor.pygments.lexers.graphics', 'Gnuplot', ('gnuplot',), ('*.plot', '*.plt'), ('text/x-gnuplot',)),
+    'GoLexer': ('pip._vendor.pygments.lexers.go', 'Go', ('go', 'golang'), ('*.go',), ('text/x-gosrc',)),
+    'GoloLexer': ('pip._vendor.pygments.lexers.jvm', 'Golo', ('golo',), ('*.golo',), ()),
+    'GoodDataCLLexer': ('pip._vendor.pygments.lexers.business', 'GoodData-CL', ('gooddata-cl',), ('*.gdc',), ('text/x-gooddata-cl',)),
+    'GosuLexer': ('pip._vendor.pygments.lexers.jvm', 'Gosu', ('gosu',), ('*.gs', '*.gsx', '*.gsp', '*.vark'), ('text/x-gosu',)),
+    'GosuTemplateLexer': ('pip._vendor.pygments.lexers.jvm', 'Gosu Template', ('gst',), ('*.gst',), ('text/x-gosu-template',)),
+    'GraphvizLexer': ('pip._vendor.pygments.lexers.graphviz', 'Graphviz', ('graphviz', 'dot'), ('*.gv', '*.dot'), ('text/x-graphviz', 'text/vnd.graphviz')),
+    'GroffLexer': ('pip._vendor.pygments.lexers.markup', 'Groff', ('groff', 'nroff', 'man'), ('*.[1-9]', '*.man', '*.1p', '*.3pm'), ('application/x-troff', 'text/troff')),
+    'GroovyLexer': ('pip._vendor.pygments.lexers.jvm', 'Groovy', ('groovy',), ('*.groovy', '*.gradle'), ('text/x-groovy',)),
+    'HLSLShaderLexer': ('pip._vendor.pygments.lexers.graphics', 'HLSL', ('hlsl',), ('*.hlsl', '*.hlsli'), ('text/x-hlsl',)),
+    'HTMLUL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'HTML+UL4', ('html+ul4',), ('*.htmlul4',), ()),
+    'HamlLexer': ('pip._vendor.pygments.lexers.html', 'Haml', ('haml',), ('*.haml',), ('text/x-haml',)),
+    'HandlebarsHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Handlebars', ('html+handlebars',), ('*.handlebars', '*.hbs'), ('text/html+handlebars', 'text/x-handlebars-template')),
+    'HandlebarsLexer': ('pip._vendor.pygments.lexers.templates', 'Handlebars', ('handlebars',), (), ()),
+    'HaskellLexer': ('pip._vendor.pygments.lexers.haskell', 'Haskell', ('haskell', 'hs'), ('*.hs',), ('text/x-haskell',)),
+    'HaxeLexer': ('pip._vendor.pygments.lexers.haxe', 'Haxe', ('haxe', 'hxsl', 'hx'), ('*.hx', '*.hxsl'), ('text/haxe', 'text/x-haxe', 'text/x-hx')),
+    'HexdumpLexer': ('pip._vendor.pygments.lexers.hexdump', 'Hexdump', ('hexdump',), (), ()),
+    'HsailLexer': ('pip._vendor.pygments.lexers.asm', 'HSAIL', ('hsail', 'hsa'), ('*.hsail',), ('text/x-hsail',)),
+    'HspecLexer': ('pip._vendor.pygments.lexers.haskell', 'Hspec', ('hspec',), (), ()),
+    'HtmlDjangoLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Django/Jinja', ('html+django', 'html+jinja', 'htmldjango'), ('*.html.j2', '*.htm.j2', '*.xhtml.j2', '*.html.jinja2', '*.htm.jinja2', '*.xhtml.jinja2'), ('text/html+django', 'text/html+jinja')),
+    'HtmlGenshiLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Genshi', ('html+genshi', 'html+kid'), (), ('text/html+genshi',)),
+    'HtmlLexer': ('pip._vendor.pygments.lexers.html', 'HTML', ('html',), ('*.html', '*.htm', '*.xhtml', '*.xslt'), ('text/html', 'application/xhtml+xml')),
+    'HtmlPhpLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+PHP', ('html+php',), ('*.phtml',), ('application/x-php', 'application/x-httpd-php', 'application/x-httpd-php3', 'application/x-httpd-php4', 'application/x-httpd-php5')),
+    'HtmlSmartyLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Smarty', ('html+smarty',), (), ('text/html+smarty',)),
+    'HttpLexer': ('pip._vendor.pygments.lexers.textfmts', 'HTTP', ('http',), (), ()),
+    'HxmlLexer': ('pip._vendor.pygments.lexers.haxe', 'Hxml', ('haxeml', 'hxml'), ('*.hxml',), ()),
+    'HyLexer': ('pip._vendor.pygments.lexers.lisp', 'Hy', ('hylang',), ('*.hy',), ('text/x-hy', 'application/x-hy')),
+    'HybrisLexer': ('pip._vendor.pygments.lexers.scripting', 'Hybris', ('hybris', 'hy'), ('*.hy', '*.hyb'), ('text/x-hybris', 'application/x-hybris')),
+    'IDLLexer': ('pip._vendor.pygments.lexers.idl', 'IDL', ('idl',), ('*.pro',), ('text/idl',)),
+    'IconLexer': ('pip._vendor.pygments.lexers.unicon', 'Icon', ('icon',), ('*.icon', '*.ICON'), ()),
+    'IdrisLexer': ('pip._vendor.pygments.lexers.haskell', 'Idris', ('idris', 'idr'), ('*.idr',), ('text/x-idris',)),
+    'IgorLexer': ('pip._vendor.pygments.lexers.igor', 'Igor', ('igor', 'igorpro'), ('*.ipf',), ('text/ipf',)),
+    'Inform6Lexer': ('pip._vendor.pygments.lexers.int_fiction', 'Inform 6', ('inform6', 'i6'), ('*.inf',), ()),
+    'Inform6TemplateLexer': ('pip._vendor.pygments.lexers.int_fiction', 'Inform 6 template', ('i6t',), ('*.i6t',), ()),
+    'Inform7Lexer': ('pip._vendor.pygments.lexers.int_fiction', 'Inform 7', ('inform7', 'i7'), ('*.ni', '*.i7x'), ()),
+    'IniLexer': ('pip._vendor.pygments.lexers.configs', 'INI', ('ini', 'cfg', 'dosini'), ('*.ini', '*.cfg', '*.inf', '.editorconfig', '*.service', '*.socket', '*.device', '*.mount', '*.automount', '*.swap', '*.target', '*.path', '*.timer', '*.slice', '*.scope'), ('text/x-ini', 'text/inf')),
+    'IoLexer': ('pip._vendor.pygments.lexers.iolang', 'Io', ('io',), ('*.io',), ('text/x-iosrc',)),
+    'IokeLexer': ('pip._vendor.pygments.lexers.jvm', 'Ioke', ('ioke', 'ik'), ('*.ik',), ('text/x-iokesrc',)),
+    'IrcLogsLexer': ('pip._vendor.pygments.lexers.textfmts', 'IRC logs', ('irc',), ('*.weechatlog',), ('text/x-irclog',)),
+    'IsabelleLexer': ('pip._vendor.pygments.lexers.theorem', 'Isabelle', ('isabelle',), ('*.thy',), ('text/x-isabelle',)),
+    'JLexer': ('pip._vendor.pygments.lexers.j', 'J', ('j',), ('*.ijs',), ('text/x-j',)),
+    'JMESPathLexer': ('pip._vendor.pygments.lexers.jmespath', 'JMESPath', ('jmespath', 'jp'), ('*.jp',), ()),
+    'JSLTLexer': ('pip._vendor.pygments.lexers.jslt', 'JSLT', ('jslt',), ('*.jslt',), ('text/x-jslt',)),
+    'JagsLexer': ('pip._vendor.pygments.lexers.modeling', 'JAGS', ('jags',), ('*.jag', '*.bug'), ()),
+    'JasminLexer': ('pip._vendor.pygments.lexers.jvm', 'Jasmin', ('jasmin', 'jasminxt'), ('*.j',), ()),
+    'JavaLexer': ('pip._vendor.pygments.lexers.jvm', 'Java', ('java',), ('*.java',), ('text/x-java',)),
+    'JavascriptDjangoLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Django/Jinja', ('javascript+django', 'js+django', 'javascript+jinja', 'js+jinja'), ('*.js.j2', '*.js.jinja2'), ('application/x-javascript+django', 'application/x-javascript+jinja', 'text/x-javascript+django', 'text/x-javascript+jinja', 'text/javascript+django', 'text/javascript+jinja')),
+    'JavascriptErbLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Ruby', ('javascript+ruby', 'js+ruby', 'javascript+erb', 'js+erb'), (), ('application/x-javascript+ruby', 'text/x-javascript+ruby', 'text/javascript+ruby')),
+    'JavascriptGenshiLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Genshi Text', ('js+genshitext', 'js+genshi', 'javascript+genshitext', 'javascript+genshi'), (), ('application/x-javascript+genshi', 'text/x-javascript+genshi', 'text/javascript+genshi')),
+    'JavascriptLexer': ('pip._vendor.pygments.lexers.javascript', 'JavaScript', ('javascript', 'js'), ('*.js', '*.jsm', '*.mjs', '*.cjs'), ('application/javascript', 'application/x-javascript', 'text/x-javascript', 'text/javascript')),
+    'JavascriptPhpLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+PHP', ('javascript+php', 'js+php'), (), ('application/x-javascript+php', 'text/x-javascript+php', 'text/javascript+php')),
+    'JavascriptSmartyLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Smarty', ('javascript+smarty', 'js+smarty'), (), ('application/x-javascript+smarty', 'text/x-javascript+smarty', 'text/javascript+smarty')),
+    'JavascriptUL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'Javascript+UL4', ('js+ul4',), ('*.jsul4',), ()),
+    'JclLexer': ('pip._vendor.pygments.lexers.scripting', 'JCL', ('jcl',), ('*.jcl',), ('text/x-jcl',)),
+    'JsgfLexer': ('pip._vendor.pygments.lexers.grammar_notation', 'JSGF', ('jsgf',), ('*.jsgf',), ('application/jsgf', 'application/x-jsgf', 'text/jsgf')),
+    'JsonBareObjectLexer': ('pip._vendor.pygments.lexers.data', 'JSONBareObject', (), (), ()),
+    'JsonLdLexer': ('pip._vendor.pygments.lexers.data', 'JSON-LD', ('jsonld', 'json-ld'), ('*.jsonld',), ('application/ld+json',)),
+    'JsonLexer': ('pip._vendor.pygments.lexers.data', 'JSON', ('json', 'json-object'), ('*.json', 'Pipfile.lock'), ('application/json', 'application/json-object')),
+    'JspLexer': ('pip._vendor.pygments.lexers.templates', 'Java Server Page', ('jsp',), ('*.jsp',), ('application/x-jsp',)),
+    'JuliaConsoleLexer': ('pip._vendor.pygments.lexers.julia', 'Julia console', ('jlcon', 'julia-repl'), (), ()),
+    'JuliaLexer': ('pip._vendor.pygments.lexers.julia', 'Julia', ('julia', 'jl'), ('*.jl',), ('text/x-julia', 'application/x-julia')),
+    'JuttleLexer': ('pip._vendor.pygments.lexers.javascript', 'Juttle', ('juttle',), ('*.juttle',), ('application/juttle', 'application/x-juttle', 'text/x-juttle', 'text/juttle')),
+    'KLexer': ('pip._vendor.pygments.lexers.q', 'K', ('k',), ('*.k',), ()),
+    'KalLexer': ('pip._vendor.pygments.lexers.javascript', 'Kal', ('kal',), ('*.kal',), ('text/kal', 'application/kal')),
+    'KconfigLexer': ('pip._vendor.pygments.lexers.configs', 'Kconfig', ('kconfig', 'menuconfig', 'linux-config', 'kernel-config'), ('Kconfig*', '*Config.in*', 'external.in*', 'standard-modules.in'), ('text/x-kconfig',)),
+    'KernelLogLexer': ('pip._vendor.pygments.lexers.textfmts', 'Kernel log', ('kmsg', 'dmesg'), ('*.kmsg', '*.dmesg'), ()),
+    'KokaLexer': ('pip._vendor.pygments.lexers.haskell', 'Koka', ('koka',), ('*.kk', '*.kki'), ('text/x-koka',)),
+    'KotlinLexer': ('pip._vendor.pygments.lexers.jvm', 'Kotlin', ('kotlin',), ('*.kt', '*.kts'), ('text/x-kotlin',)),
+    'KuinLexer': ('pip._vendor.pygments.lexers.kuin', 'Kuin', ('kuin',), ('*.kn',), ()),
+    'LSLLexer': ('pip._vendor.pygments.lexers.scripting', 'LSL', ('lsl',), ('*.lsl',), ('text/x-lsl',)),
+    'LassoCssLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Lasso', ('css+lasso',), (), ('text/css+lasso',)),
+    'LassoHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Lasso', ('html+lasso',), (), ('text/html+lasso', 'application/x-httpd-lasso', 'application/x-httpd-lasso[89]')),
+    'LassoJavascriptLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Lasso', ('javascript+lasso', 'js+lasso'), (), ('application/x-javascript+lasso', 'text/x-javascript+lasso', 'text/javascript+lasso')),
+    'LassoLexer': ('pip._vendor.pygments.lexers.javascript', 'Lasso', ('lasso', 'lassoscript'), ('*.lasso', '*.lasso[89]'), ('text/x-lasso',)),
+    'LassoXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Lasso', ('xml+lasso',), (), ('application/xml+lasso',)),
+    'LeanLexer': ('pip._vendor.pygments.lexers.theorem', 'Lean', ('lean',), ('*.lean',), ('text/x-lean',)),
+    'LessCssLexer': ('pip._vendor.pygments.lexers.css', 'LessCss', ('less',), ('*.less',), ('text/x-less-css',)),
+    'LighttpdConfLexer': ('pip._vendor.pygments.lexers.configs', 'Lighttpd configuration file', ('lighttpd', 'lighty'), ('lighttpd.conf',), ('text/x-lighttpd-conf',)),
+    'LilyPondLexer': ('pip._vendor.pygments.lexers.lilypond', 'LilyPond', ('lilypond',), ('*.ly',), ()),
+    'LimboLexer': ('pip._vendor.pygments.lexers.inferno', 'Limbo', ('limbo',), ('*.b',), ('text/limbo',)),
+    'LiquidLexer': ('pip._vendor.pygments.lexers.templates', 'liquid', ('liquid',), ('*.liquid',), ()),
+    'LiterateAgdaLexer': ('pip._vendor.pygments.lexers.haskell', 'Literate Agda', ('literate-agda', 'lagda'), ('*.lagda',), ('text/x-literate-agda',)),
+    'LiterateCryptolLexer': ('pip._vendor.pygments.lexers.haskell', 'Literate Cryptol', ('literate-cryptol', 'lcryptol', 'lcry'), ('*.lcry',), ('text/x-literate-cryptol',)),
+    'LiterateHaskellLexer': ('pip._vendor.pygments.lexers.haskell', 'Literate Haskell', ('literate-haskell', 'lhaskell', 'lhs'), ('*.lhs',), ('text/x-literate-haskell',)),
+    'LiterateIdrisLexer': ('pip._vendor.pygments.lexers.haskell', 'Literate Idris', ('literate-idris', 'lidris', 'lidr'), ('*.lidr',), ('text/x-literate-idris',)),
+    'LiveScriptLexer': ('pip._vendor.pygments.lexers.javascript', 'LiveScript', ('livescript', 'live-script'), ('*.ls',), ('text/livescript',)),
+    'LlvmLexer': ('pip._vendor.pygments.lexers.asm', 'LLVM', ('llvm',), ('*.ll',), ('text/x-llvm',)),
+    'LlvmMirBodyLexer': ('pip._vendor.pygments.lexers.asm', 'LLVM-MIR Body', ('llvm-mir-body',), (), ()),
+    'LlvmMirLexer': ('pip._vendor.pygments.lexers.asm', 'LLVM-MIR', ('llvm-mir',), ('*.mir',), ()),
+    'LogosLexer': ('pip._vendor.pygments.lexers.objective', 'Logos', ('logos',), ('*.x', '*.xi', '*.xm', '*.xmi'), ('text/x-logos',)),
+    'LogtalkLexer': ('pip._vendor.pygments.lexers.prolog', 'Logtalk', ('logtalk',), ('*.lgt', '*.logtalk'), ('text/x-logtalk',)),
+    'LuaLexer': ('pip._vendor.pygments.lexers.scripting', 'Lua', ('lua',), ('*.lua', '*.wlua'), ('text/x-lua', 'application/x-lua')),
+    'MCFunctionLexer': ('pip._vendor.pygments.lexers.mcfunction', 'MCFunction', ('mcfunction', 'mcf'), ('*.mcfunction',), ('text/mcfunction',)),
+    'MIMELexer': ('pip._vendor.pygments.lexers.mime', 'MIME', ('mime',), (), ('multipart/mixed', 'multipart/related', 'multipart/alternative')),
+    'MOOCodeLexer': ('pip._vendor.pygments.lexers.scripting', 'MOOCode', ('moocode', 'moo'), ('*.moo',), ('text/x-moocode',)),
+    'MSDOSSessionLexer': ('pip._vendor.pygments.lexers.shell', 'MSDOS Session', ('doscon',), (), ()),
+    'Macaulay2Lexer': ('pip._vendor.pygments.lexers.macaulay2', 'Macaulay2', ('macaulay2',), ('*.m2',), ()),
+    'MakefileLexer': ('pip._vendor.pygments.lexers.make', 'Makefile', ('make', 'makefile', 'mf', 'bsdmake'), ('*.mak', '*.mk', 'Makefile', 'makefile', 'Makefile.*', 'GNUmakefile'), ('text/x-makefile',)),
+    'MakoCssLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Mako', ('css+mako',), (), ('text/css+mako',)),
+    'MakoHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Mako', ('html+mako',), (), ('text/html+mako',)),
+    'MakoJavascriptLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Mako', ('javascript+mako', 'js+mako'), (), ('application/x-javascript+mako', 'text/x-javascript+mako', 'text/javascript+mako')),
+    'MakoLexer': ('pip._vendor.pygments.lexers.templates', 'Mako', ('mako',), ('*.mao',), ('application/x-mako',)),
+    'MakoXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Mako', ('xml+mako',), (), ('application/xml+mako',)),
+    'MaqlLexer': ('pip._vendor.pygments.lexers.business', 'MAQL', ('maql',), ('*.maql',), ('text/x-gooddata-maql', 'application/x-gooddata-maql')),
+    'MarkdownLexer': ('pip._vendor.pygments.lexers.markup', 'Markdown', ('markdown', 'md'), ('*.md', '*.markdown'), ('text/x-markdown',)),
+    'MaskLexer': ('pip._vendor.pygments.lexers.javascript', 'Mask', ('mask',), ('*.mask',), ('text/x-mask',)),
+    'MasonLexer': ('pip._vendor.pygments.lexers.templates', 'Mason', ('mason',), ('*.m', '*.mhtml', '*.mc', '*.mi', 'autohandler', 'dhandler'), ('application/x-mason',)),
+    'MathematicaLexer': ('pip._vendor.pygments.lexers.algebra', 'Mathematica', ('mathematica', 'mma', 'nb'), ('*.nb', '*.cdf', '*.nbp', '*.ma'), ('application/mathematica', 'application/vnd.wolfram.mathematica', 'application/vnd.wolfram.mathematica.package', 'application/vnd.wolfram.cdf')),
+    'MatlabLexer': ('pip._vendor.pygments.lexers.matlab', 'Matlab', ('matlab',), ('*.m',), ('text/matlab',)),
+    'MatlabSessionLexer': ('pip._vendor.pygments.lexers.matlab', 'Matlab session', ('matlabsession',), (), ()),
+    'MaximaLexer': ('pip._vendor.pygments.lexers.maxima', 'Maxima', ('maxima', 'macsyma'), ('*.mac', '*.max'), ()),
+    'MesonLexer': ('pip._vendor.pygments.lexers.meson', 'Meson', ('meson', 'meson.build'), ('meson.build', 'meson_options.txt'), ('text/x-meson',)),
+    'MiniDLexer': ('pip._vendor.pygments.lexers.d', 'MiniD', ('minid',), (), ('text/x-minidsrc',)),
+    'MiniScriptLexer': ('pip._vendor.pygments.lexers.scripting', 'MiniScript', ('miniscript', 'ms'), ('*.ms',), ('text/x-minicript', 'application/x-miniscript')),
+    'ModelicaLexer': ('pip._vendor.pygments.lexers.modeling', 'Modelica', ('modelica',), ('*.mo',), ('text/x-modelica',)),
+    'Modula2Lexer': ('pip._vendor.pygments.lexers.modula2', 'Modula-2', ('modula2', 'm2'), ('*.def', '*.mod'), ('text/x-modula2',)),
+    'MoinWikiLexer': ('pip._vendor.pygments.lexers.markup', 'MoinMoin/Trac Wiki markup', ('trac-wiki', 'moin'), (), ('text/x-trac-wiki',)),
+    'MonkeyLexer': ('pip._vendor.pygments.lexers.basic', 'Monkey', ('monkey',), ('*.monkey',), ('text/x-monkey',)),
+    'MonteLexer': ('pip._vendor.pygments.lexers.monte', 'Monte', ('monte',), ('*.mt',), ()),
+    'MoonScriptLexer': ('pip._vendor.pygments.lexers.scripting', 'MoonScript', ('moonscript', 'moon'), ('*.moon',), ('text/x-moonscript', 'application/x-moonscript')),
+    'MoselLexer': ('pip._vendor.pygments.lexers.mosel', 'Mosel', ('mosel',), ('*.mos',), ()),
+    'MozPreprocCssLexer': ('pip._vendor.pygments.lexers.markup', 'CSS+mozpreproc', ('css+mozpreproc',), ('*.css.in',), ()),
+    'MozPreprocHashLexer': ('pip._vendor.pygments.lexers.markup', 'mozhashpreproc', ('mozhashpreproc',), (), ()),
+    'MozPreprocJavascriptLexer': ('pip._vendor.pygments.lexers.markup', 'Javascript+mozpreproc', ('javascript+mozpreproc',), ('*.js.in',), ()),
+    'MozPreprocPercentLexer': ('pip._vendor.pygments.lexers.markup', 'mozpercentpreproc', ('mozpercentpreproc',), (), ()),
+    'MozPreprocXulLexer': ('pip._vendor.pygments.lexers.markup', 'XUL+mozpreproc', ('xul+mozpreproc',), ('*.xul.in',), ()),
+    'MqlLexer': ('pip._vendor.pygments.lexers.c_like', 'MQL', ('mql', 'mq4', 'mq5', 'mql4', 'mql5'), ('*.mq4', '*.mq5', '*.mqh'), ('text/x-mql',)),
+    'MscgenLexer': ('pip._vendor.pygments.lexers.dsls', 'Mscgen', ('mscgen', 'msc'), ('*.msc',), ()),
+    'MuPADLexer': ('pip._vendor.pygments.lexers.algebra', 'MuPAD', ('mupad',), ('*.mu',), ()),
+    'MxmlLexer': ('pip._vendor.pygments.lexers.actionscript', 'MXML', ('mxml',), ('*.mxml',), ()),
+    'MySqlLexer': ('pip._vendor.pygments.lexers.sql', 'MySQL', ('mysql',), (), ('text/x-mysql',)),
+    'MyghtyCssLexer': ('pip._vendor.pygments.lexers.templates', 'CSS+Myghty', ('css+myghty',), (), ('text/css+myghty',)),
+    'MyghtyHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Myghty', ('html+myghty',), (), ('text/html+myghty',)),
+    'MyghtyJavascriptLexer': ('pip._vendor.pygments.lexers.templates', 'JavaScript+Myghty', ('javascript+myghty', 'js+myghty'), (), ('application/x-javascript+myghty', 'text/x-javascript+myghty', 'text/javascript+mygthy')),
+    'MyghtyLexer': ('pip._vendor.pygments.lexers.templates', 'Myghty', ('myghty',), ('*.myt', 'autodelegate'), ('application/x-myghty',)),
+    'MyghtyXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Myghty', ('xml+myghty',), (), ('application/xml+myghty',)),
+    'NCLLexer': ('pip._vendor.pygments.lexers.ncl', 'NCL', ('ncl',), ('*.ncl',), ('text/ncl',)),
+    'NSISLexer': ('pip._vendor.pygments.lexers.installers', 'NSIS', ('nsis', 'nsi', 'nsh'), ('*.nsi', '*.nsh'), ('text/x-nsis',)),
+    'NasmLexer': ('pip._vendor.pygments.lexers.asm', 'NASM', ('nasm',), ('*.asm', '*.ASM'), ('text/x-nasm',)),
+    'NasmObjdumpLexer': ('pip._vendor.pygments.lexers.asm', 'objdump-nasm', ('objdump-nasm',), ('*.objdump-intel',), ('text/x-nasm-objdump',)),
+    'NemerleLexer': ('pip._vendor.pygments.lexers.dotnet', 'Nemerle', ('nemerle',), ('*.n',), ('text/x-nemerle',)),
+    'NesCLexer': ('pip._vendor.pygments.lexers.c_like', 'nesC', ('nesc',), ('*.nc',), ('text/x-nescsrc',)),
+    'NestedTextLexer': ('pip._vendor.pygments.lexers.configs', 'NestedText', ('nestedtext', 'nt'), ('*.nt',), ()),
+    'NewLispLexer': ('pip._vendor.pygments.lexers.lisp', 'NewLisp', ('newlisp',), ('*.lsp', '*.nl', '*.kif'), ('text/x-newlisp', 'application/x-newlisp')),
+    'NewspeakLexer': ('pip._vendor.pygments.lexers.smalltalk', 'Newspeak', ('newspeak',), ('*.ns2',), ('text/x-newspeak',)),
+    'NginxConfLexer': ('pip._vendor.pygments.lexers.configs', 'Nginx configuration file', ('nginx',), ('nginx.conf',), ('text/x-nginx-conf',)),
+    'NimrodLexer': ('pip._vendor.pygments.lexers.nimrod', 'Nimrod', ('nimrod', 'nim'), ('*.nim', '*.nimrod'), ('text/x-nim',)),
+    'NitLexer': ('pip._vendor.pygments.lexers.nit', 'Nit', ('nit',), ('*.nit',), ()),
+    'NixLexer': ('pip._vendor.pygments.lexers.nix', 'Nix', ('nixos', 'nix'), ('*.nix',), ('text/x-nix',)),
+    'NodeConsoleLexer': ('pip._vendor.pygments.lexers.javascript', 'Node.js REPL console session', ('nodejsrepl',), (), ('text/x-nodejsrepl',)),
+    'NotmuchLexer': ('pip._vendor.pygments.lexers.textfmts', 'Notmuch', ('notmuch',), (), ()),
+    'NuSMVLexer': ('pip._vendor.pygments.lexers.smv', 'NuSMV', ('nusmv',), ('*.smv',), ()),
+    'NumPyLexer': ('pip._vendor.pygments.lexers.python', 'NumPy', ('numpy',), (), ()),
+    'ObjdumpLexer': ('pip._vendor.pygments.lexers.asm', 'objdump', ('objdump',), ('*.objdump',), ('text/x-objdump',)),
+    'ObjectiveCLexer': ('pip._vendor.pygments.lexers.objective', 'Objective-C', ('objective-c', 'objectivec', 'obj-c', 'objc'), ('*.m', '*.h'), ('text/x-objective-c',)),
+    'ObjectiveCppLexer': ('pip._vendor.pygments.lexers.objective', 'Objective-C++', ('objective-c++', 'objectivec++', 'obj-c++', 'objc++'), ('*.mm', '*.hh'), ('text/x-objective-c++',)),
+    'ObjectiveJLexer': ('pip._vendor.pygments.lexers.javascript', 'Objective-J', ('objective-j', 'objectivej', 'obj-j', 'objj'), ('*.j',), ('text/x-objective-j',)),
+    'OcamlLexer': ('pip._vendor.pygments.lexers.ml', 'OCaml', ('ocaml',), ('*.ml', '*.mli', '*.mll', '*.mly'), ('text/x-ocaml',)),
+    'OctaveLexer': ('pip._vendor.pygments.lexers.matlab', 'Octave', ('octave',), ('*.m',), ('text/octave',)),
+    'OdinLexer': ('pip._vendor.pygments.lexers.archetype', 'ODIN', ('odin',), ('*.odin',), ('text/odin',)),
+    'OmgIdlLexer': ('pip._vendor.pygments.lexers.c_like', 'OMG Interface Definition Language', ('omg-idl',), ('*.idl', '*.pidl'), ()),
+    'OocLexer': ('pip._vendor.pygments.lexers.ooc', 'Ooc', ('ooc',), ('*.ooc',), ('text/x-ooc',)),
+    'OpaLexer': ('pip._vendor.pygments.lexers.ml', 'Opa', ('opa',), ('*.opa',), ('text/x-opa',)),
+    'OpenEdgeLexer': ('pip._vendor.pygments.lexers.business', 'OpenEdge ABL', ('openedge', 'abl', 'progress'), ('*.p', '*.cls'), ('text/x-openedge', 'application/x-openedge')),
+    'OutputLexer': ('pip._vendor.pygments.lexers.special', 'Text output', ('output',), (), ()),
+    'PacmanConfLexer': ('pip._vendor.pygments.lexers.configs', 'PacmanConf', ('pacmanconf',), ('pacman.conf',), ()),
+    'PanLexer': ('pip._vendor.pygments.lexers.dsls', 'Pan', ('pan',), ('*.pan',), ()),
+    'ParaSailLexer': ('pip._vendor.pygments.lexers.parasail', 'ParaSail', ('parasail',), ('*.psi', '*.psl'), ('text/x-parasail',)),
+    'PawnLexer': ('pip._vendor.pygments.lexers.pawn', 'Pawn', ('pawn',), ('*.p', '*.pwn', '*.inc'), ('text/x-pawn',)),
+    'PegLexer': ('pip._vendor.pygments.lexers.grammar_notation', 'PEG', ('peg',), ('*.peg',), ('text/x-peg',)),
+    'Perl6Lexer': ('pip._vendor.pygments.lexers.perl', 'Perl6', ('perl6', 'pl6', 'raku'), ('*.pl', '*.pm', '*.nqp', '*.p6', '*.6pl', '*.p6l', '*.pl6', '*.6pm', '*.p6m', '*.pm6', '*.t', '*.raku', '*.rakumod', '*.rakutest', '*.rakudoc'), ('text/x-perl6', 'application/x-perl6')),
+    'PerlLexer': ('pip._vendor.pygments.lexers.perl', 'Perl', ('perl', 'pl'), ('*.pl', '*.pm', '*.t', '*.perl'), ('text/x-perl', 'application/x-perl')),
+    'PhpLexer': ('pip._vendor.pygments.lexers.php', 'PHP', ('php', 'php3', 'php4', 'php5'), ('*.php', '*.php[345]', '*.inc'), ('text/x-php',)),
+    'PigLexer': ('pip._vendor.pygments.lexers.jvm', 'Pig', ('pig',), ('*.pig',), ('text/x-pig',)),
+    'PikeLexer': ('pip._vendor.pygments.lexers.c_like', 'Pike', ('pike',), ('*.pike', '*.pmod'), ('text/x-pike',)),
+    'PkgConfigLexer': ('pip._vendor.pygments.lexers.configs', 'PkgConfig', ('pkgconfig',), ('*.pc',), ()),
+    'PlPgsqlLexer': ('pip._vendor.pygments.lexers.sql', 'PL/pgSQL', ('plpgsql',), (), ('text/x-plpgsql',)),
+    'PointlessLexer': ('pip._vendor.pygments.lexers.pointless', 'Pointless', ('pointless',), ('*.ptls',), ()),
+    'PonyLexer': ('pip._vendor.pygments.lexers.pony', 'Pony', ('pony',), ('*.pony',), ()),
+    'PostScriptLexer': ('pip._vendor.pygments.lexers.graphics', 'PostScript', ('postscript', 'postscr'), ('*.ps', '*.eps'), ('application/postscript',)),
+    'PostgresConsoleLexer': ('pip._vendor.pygments.lexers.sql', 'PostgreSQL console (psql)', ('psql', 'postgresql-console', 'postgres-console'), (), ('text/x-postgresql-psql',)),
+    'PostgresLexer': ('pip._vendor.pygments.lexers.sql', 'PostgreSQL SQL dialect', ('postgresql', 'postgres'), (), ('text/x-postgresql',)),
+    'PovrayLexer': ('pip._vendor.pygments.lexers.graphics', 'POVRay', ('pov',), ('*.pov', '*.inc'), ('text/x-povray',)),
+    'PowerShellLexer': ('pip._vendor.pygments.lexers.shell', 'PowerShell', ('powershell', 'pwsh', 'posh', 'ps1', 'psm1'), ('*.ps1', '*.psm1'), ('text/x-powershell',)),
+    'PowerShellSessionLexer': ('pip._vendor.pygments.lexers.shell', 'PowerShell Session', ('pwsh-session', 'ps1con'), (), ()),
+    'PraatLexer': ('pip._vendor.pygments.lexers.praat', 'Praat', ('praat',), ('*.praat', '*.proc', '*.psc'), ()),
+    'ProcfileLexer': ('pip._vendor.pygments.lexers.procfile', 'Procfile', ('procfile',), ('Procfile',), ()),
+    'PrologLexer': ('pip._vendor.pygments.lexers.prolog', 'Prolog', ('prolog',), ('*.ecl', '*.prolog', '*.pro', '*.pl'), ('text/x-prolog',)),
+    'PromQLLexer': ('pip._vendor.pygments.lexers.promql', 'PromQL', ('promql',), ('*.promql',), ()),
+    'PropertiesLexer': ('pip._vendor.pygments.lexers.configs', 'Properties', ('properties', 'jproperties'), ('*.properties',), ('text/x-java-properties',)),
+    'ProtoBufLexer': ('pip._vendor.pygments.lexers.dsls', 'Protocol Buffer', ('protobuf', 'proto'), ('*.proto',), ()),
+    'PsyshConsoleLexer': ('pip._vendor.pygments.lexers.php', 'PsySH console session for PHP', ('psysh',), (), ()),
+    'PugLexer': ('pip._vendor.pygments.lexers.html', 'Pug', ('pug', 'jade'), ('*.pug', '*.jade'), ('text/x-pug', 'text/x-jade')),
+    'PuppetLexer': ('pip._vendor.pygments.lexers.dsls', 'Puppet', ('puppet',), ('*.pp',), ()),
+    'PyPyLogLexer': ('pip._vendor.pygments.lexers.console', 'PyPy Log', ('pypylog', 'pypy'), ('*.pypylog',), ('application/x-pypylog',)),
+    'Python2Lexer': ('pip._vendor.pygments.lexers.python', 'Python 2.x', ('python2', 'py2'), (), ('text/x-python2', 'application/x-python2')),
+    'Python2TracebackLexer': ('pip._vendor.pygments.lexers.python', 'Python 2.x Traceback', ('py2tb',), ('*.py2tb',), ('text/x-python2-traceback',)),
+    'PythonConsoleLexer': ('pip._vendor.pygments.lexers.python', 'Python console session', ('pycon',), (), ('text/x-python-doctest',)),
+    'PythonLexer': ('pip._vendor.pygments.lexers.python', 'Python', ('python', 'py', 'sage', 'python3', 'py3'), ('*.py', '*.pyw', '*.jy', '*.sage', '*.sc', 'SConstruct', 'SConscript', '*.bzl', 'BUCK', 'BUILD', 'BUILD.bazel', 'WORKSPACE', '*.tac'), ('text/x-python', 'application/x-python', 'text/x-python3', 'application/x-python3')),
+    'PythonTracebackLexer': ('pip._vendor.pygments.lexers.python', 'Python Traceback', ('pytb', 'py3tb'), ('*.pytb', '*.py3tb'), ('text/x-python-traceback', 'text/x-python3-traceback')),
+    'PythonUL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'Python+UL4', ('py+ul4',), ('*.pyul4',), ()),
+    'QBasicLexer': ('pip._vendor.pygments.lexers.basic', 'QBasic', ('qbasic', 'basic'), ('*.BAS', '*.bas'), ('text/basic',)),
+    'QLexer': ('pip._vendor.pygments.lexers.q', 'Q', ('q',), ('*.q',), ()),
+    'QVToLexer': ('pip._vendor.pygments.lexers.qvt', 'QVTO', ('qvto', 'qvt'), ('*.qvto',), ()),
+    'QlikLexer': ('pip._vendor.pygments.lexers.qlik', 'Qlik', ('qlik', 'qlikview', 'qliksense', 'qlikscript'), ('*.qvs', '*.qvw'), ()),
+    'QmlLexer': ('pip._vendor.pygments.lexers.webmisc', 'QML', ('qml', 'qbs'), ('*.qml', '*.qbs'), ('application/x-qml', 'application/x-qt.qbs+qml')),
+    'RConsoleLexer': ('pip._vendor.pygments.lexers.r', 'RConsole', ('rconsole', 'rout'), ('*.Rout',), ()),
+    'RNCCompactLexer': ('pip._vendor.pygments.lexers.rnc', 'Relax-NG Compact', ('rng-compact', 'rnc'), ('*.rnc',), ()),
+    'RPMSpecLexer': ('pip._vendor.pygments.lexers.installers', 'RPMSpec', ('spec',), ('*.spec',), ('text/x-rpm-spec',)),
+    'RacketLexer': ('pip._vendor.pygments.lexers.lisp', 'Racket', ('racket', 'rkt'), ('*.rkt', '*.rktd', '*.rktl'), ('text/x-racket', 'application/x-racket')),
+    'RagelCLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in C Host', ('ragel-c',), ('*.rl',), ()),
+    'RagelCppLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in CPP Host', ('ragel-cpp',), ('*.rl',), ()),
+    'RagelDLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in D Host', ('ragel-d',), ('*.rl',), ()),
+    'RagelEmbeddedLexer': ('pip._vendor.pygments.lexers.parsers', 'Embedded Ragel', ('ragel-em',), ('*.rl',), ()),
+    'RagelJavaLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in Java Host', ('ragel-java',), ('*.rl',), ()),
+    'RagelLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel', ('ragel',), (), ()),
+    'RagelObjectiveCLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in Objective C Host', ('ragel-objc',), ('*.rl',), ()),
+    'RagelRubyLexer': ('pip._vendor.pygments.lexers.parsers', 'Ragel in Ruby Host', ('ragel-ruby', 'ragel-rb'), ('*.rl',), ()),
+    'RawTokenLexer': ('pip._vendor.pygments.lexers.special', 'Raw token data', (), (), ('application/x-pygments-tokens',)),
+    'RdLexer': ('pip._vendor.pygments.lexers.r', 'Rd', ('rd',), ('*.Rd',), ('text/x-r-doc',)),
+    'ReasonLexer': ('pip._vendor.pygments.lexers.ml', 'ReasonML', ('reasonml', 'reason'), ('*.re', '*.rei'), ('text/x-reasonml',)),
+    'RebolLexer': ('pip._vendor.pygments.lexers.rebol', 'REBOL', ('rebol',), ('*.r', '*.r3', '*.reb'), ('text/x-rebol',)),
+    'RedLexer': ('pip._vendor.pygments.lexers.rebol', 'Red', ('red', 'red/system'), ('*.red', '*.reds'), ('text/x-red', 'text/x-red-system')),
+    'RedcodeLexer': ('pip._vendor.pygments.lexers.esoteric', 'Redcode', ('redcode',), ('*.cw',), ()),
+    'RegeditLexer': ('pip._vendor.pygments.lexers.configs', 'reg', ('registry',), ('*.reg',), ('text/x-windows-registry',)),
+    'ResourceLexer': ('pip._vendor.pygments.lexers.resource', 'ResourceBundle', ('resourcebundle', 'resource'), (), ()),
+    'RexxLexer': ('pip._vendor.pygments.lexers.scripting', 'Rexx', ('rexx', 'arexx'), ('*.rexx', '*.rex', '*.rx', '*.arexx'), ('text/x-rexx',)),
+    'RhtmlLexer': ('pip._vendor.pygments.lexers.templates', 'RHTML', ('rhtml', 'html+erb', 'html+ruby'), ('*.rhtml',), ('text/html+ruby',)),
+    'RideLexer': ('pip._vendor.pygments.lexers.ride', 'Ride', ('ride',), ('*.ride',), ('text/x-ride',)),
+    'RitaLexer': ('pip._vendor.pygments.lexers.rita', 'Rita', ('rita',), ('*.rita',), ('text/rita',)),
+    'RoboconfGraphLexer': ('pip._vendor.pygments.lexers.roboconf', 'Roboconf Graph', ('roboconf-graph',), ('*.graph',), ()),
+    'RoboconfInstancesLexer': ('pip._vendor.pygments.lexers.roboconf', 'Roboconf Instances', ('roboconf-instances',), ('*.instances',), ()),
+    'RobotFrameworkLexer': ('pip._vendor.pygments.lexers.robotframework', 'RobotFramework', ('robotframework',), ('*.robot', '*.resource'), ('text/x-robotframework',)),
+    'RqlLexer': ('pip._vendor.pygments.lexers.sql', 'RQL', ('rql',), ('*.rql',), ('text/x-rql',)),
+    'RslLexer': ('pip._vendor.pygments.lexers.dsls', 'RSL', ('rsl',), ('*.rsl',), ('text/rsl',)),
+    'RstLexer': ('pip._vendor.pygments.lexers.markup', 'reStructuredText', ('restructuredtext', 'rst', 'rest'), ('*.rst', '*.rest'), ('text/x-rst', 'text/prs.fallenstein.rst')),
+    'RtsLexer': ('pip._vendor.pygments.lexers.trafficscript', 'TrafficScript', ('trafficscript', 'rts'), ('*.rts',), ()),
+    'RubyConsoleLexer': ('pip._vendor.pygments.lexers.ruby', 'Ruby irb session', ('rbcon', 'irb'), (), ('text/x-ruby-shellsession',)),
+    'RubyLexer': ('pip._vendor.pygments.lexers.ruby', 'Ruby', ('ruby', 'rb', 'duby'), ('*.rb', '*.rbw', 'Rakefile', '*.rake', '*.gemspec', '*.rbx', '*.duby', 'Gemfile', 'Vagrantfile'), ('text/x-ruby', 'application/x-ruby')),
+    'RustLexer': ('pip._vendor.pygments.lexers.rust', 'Rust', ('rust', 'rs'), ('*.rs', '*.rs.in'), ('text/rust', 'text/x-rust')),
+    'SASLexer': ('pip._vendor.pygments.lexers.sas', 'SAS', ('sas',), ('*.SAS', '*.sas'), ('text/x-sas', 'text/sas', 'application/x-sas')),
+    'SLexer': ('pip._vendor.pygments.lexers.r', 'S', ('splus', 's', 'r'), ('*.S', '*.R', '.Rhistory', '.Rprofile', '.Renviron'), ('text/S-plus', 'text/S', 'text/x-r-source', 'text/x-r', 'text/x-R', 'text/x-r-history', 'text/x-r-profile')),
+    'SMLLexer': ('pip._vendor.pygments.lexers.ml', 'Standard ML', ('sml',), ('*.sml', '*.sig', '*.fun'), ('text/x-standardml', 'application/x-standardml')),
+    'SNBTLexer': ('pip._vendor.pygments.lexers.mcfunction', 'SNBT', ('snbt',), ('*.snbt',), ('text/snbt',)),
+    'SarlLexer': ('pip._vendor.pygments.lexers.jvm', 'SARL', ('sarl',), ('*.sarl',), ('text/x-sarl',)),
+    'SassLexer': ('pip._vendor.pygments.lexers.css', 'Sass', ('sass',), ('*.sass',), ('text/x-sass',)),
+    'SaviLexer': ('pip._vendor.pygments.lexers.savi', 'Savi', ('savi',), ('*.savi',), ()),
+    'ScalaLexer': ('pip._vendor.pygments.lexers.jvm', 'Scala', ('scala',), ('*.scala',), ('text/x-scala',)),
+    'ScamlLexer': ('pip._vendor.pygments.lexers.html', 'Scaml', ('scaml',), ('*.scaml',), ('text/x-scaml',)),
+    'ScdocLexer': ('pip._vendor.pygments.lexers.scdoc', 'scdoc', ('scdoc', 'scd'), ('*.scd', '*.scdoc'), ()),
+    'SchemeLexer': ('pip._vendor.pygments.lexers.lisp', 'Scheme', ('scheme', 'scm'), ('*.scm', '*.ss'), ('text/x-scheme', 'application/x-scheme')),
+    'ScilabLexer': ('pip._vendor.pygments.lexers.matlab', 'Scilab', ('scilab',), ('*.sci', '*.sce', '*.tst'), ('text/scilab',)),
+    'ScssLexer': ('pip._vendor.pygments.lexers.css', 'SCSS', ('scss',), ('*.scss',), ('text/x-scss',)),
+    'SedLexer': ('pip._vendor.pygments.lexers.textedit', 'Sed', ('sed', 'gsed', 'ssed'), ('*.sed', '*.[gs]sed'), ('text/x-sed',)),
+    'ShExCLexer': ('pip._vendor.pygments.lexers.rdf', 'ShExC', ('shexc', 'shex'), ('*.shex',), ('text/shex',)),
+    'ShenLexer': ('pip._vendor.pygments.lexers.lisp', 'Shen', ('shen',), ('*.shen',), ('text/x-shen', 'application/x-shen')),
+    'SieveLexer': ('pip._vendor.pygments.lexers.sieve', 'Sieve', ('sieve',), ('*.siv', '*.sieve'), ()),
+    'SilverLexer': ('pip._vendor.pygments.lexers.verification', 'Silver', ('silver',), ('*.sil', '*.vpr'), ()),
+    'SingularityLexer': ('pip._vendor.pygments.lexers.configs', 'Singularity', ('singularity',), ('*.def', 'Singularity'), ()),
+    'SlashLexer': ('pip._vendor.pygments.lexers.slash', 'Slash', ('slash',), ('*.sla',), ()),
+    'SlimLexer': ('pip._vendor.pygments.lexers.webmisc', 'Slim', ('slim',), ('*.slim',), ('text/x-slim',)),
+    'SlurmBashLexer': ('pip._vendor.pygments.lexers.shell', 'Slurm', ('slurm', 'sbatch'), ('*.sl',), ()),
+    'SmaliLexer': ('pip._vendor.pygments.lexers.dalvik', 'Smali', ('smali',), ('*.smali',), ('text/smali',)),
+    'SmalltalkLexer': ('pip._vendor.pygments.lexers.smalltalk', 'Smalltalk', ('smalltalk', 'squeak', 'st'), ('*.st',), ('text/x-smalltalk',)),
+    'SmartGameFormatLexer': ('pip._vendor.pygments.lexers.sgf', 'SmartGameFormat', ('sgf',), ('*.sgf',), ()),
+    'SmartyLexer': ('pip._vendor.pygments.lexers.templates', 'Smarty', ('smarty',), ('*.tpl',), ('application/x-smarty',)),
+    'SmithyLexer': ('pip._vendor.pygments.lexers.smithy', 'Smithy', ('smithy',), ('*.smithy',), ()),
+    'SnobolLexer': ('pip._vendor.pygments.lexers.snobol', 'Snobol', ('snobol',), ('*.snobol',), ('text/x-snobol',)),
+    'SnowballLexer': ('pip._vendor.pygments.lexers.dsls', 'Snowball', ('snowball',), ('*.sbl',), ()),
+    'SolidityLexer': ('pip._vendor.pygments.lexers.solidity', 'Solidity', ('solidity',), ('*.sol',), ()),
+    'SophiaLexer': ('pip._vendor.pygments.lexers.sophia', 'Sophia', ('sophia',), ('*.aes',), ()),
+    'SourcePawnLexer': ('pip._vendor.pygments.lexers.pawn', 'SourcePawn', ('sp',), ('*.sp',), ('text/x-sourcepawn',)),
+    'SourcesListLexer': ('pip._vendor.pygments.lexers.installers', 'Debian Sourcelist', ('debsources', 'sourceslist', 'sources.list'), ('sources.list',), ()),
+    'SparqlLexer': ('pip._vendor.pygments.lexers.rdf', 'SPARQL', ('sparql',), ('*.rq', '*.sparql'), ('application/sparql-query',)),
+    'SpiceLexer': ('pip._vendor.pygments.lexers.spice', 'Spice', ('spice', 'spicelang'), ('*.spice',), ('text/x-spice',)),
+    'SqlJinjaLexer': ('pip._vendor.pygments.lexers.templates', 'SQL+Jinja', ('sql+jinja',), ('*.sql', '*.sql.j2', '*.sql.jinja2'), ()),
+    'SqlLexer': ('pip._vendor.pygments.lexers.sql', 'SQL', ('sql',), ('*.sql',), ('text/x-sql',)),
+    'SqliteConsoleLexer': ('pip._vendor.pygments.lexers.sql', 'sqlite3con', ('sqlite3',), ('*.sqlite3-console',), ('text/x-sqlite3-console',)),
+    'SquidConfLexer': ('pip._vendor.pygments.lexers.configs', 'SquidConf', ('squidconf', 'squid.conf', 'squid'), ('squid.conf',), ('text/x-squidconf',)),
+    'SrcinfoLexer': ('pip._vendor.pygments.lexers.srcinfo', 'Srcinfo', ('srcinfo',), ('.SRCINFO',), ()),
+    'SspLexer': ('pip._vendor.pygments.lexers.templates', 'Scalate Server Page', ('ssp',), ('*.ssp',), ('application/x-ssp',)),
+    'StanLexer': ('pip._vendor.pygments.lexers.modeling', 'Stan', ('stan',), ('*.stan',), ()),
+    'StataLexer': ('pip._vendor.pygments.lexers.stata', 'Stata', ('stata', 'do'), ('*.do', '*.ado'), ('text/x-stata', 'text/stata', 'application/x-stata')),
+    'SuperColliderLexer': ('pip._vendor.pygments.lexers.supercollider', 'SuperCollider', ('supercollider', 'sc'), ('*.sc', '*.scd'), ('application/supercollider', 'text/supercollider')),
+    'SwiftLexer': ('pip._vendor.pygments.lexers.objective', 'Swift', ('swift',), ('*.swift',), ('text/x-swift',)),
+    'SwigLexer': ('pip._vendor.pygments.lexers.c_like', 'SWIG', ('swig',), ('*.swg', '*.i'), ('text/swig',)),
+    'SystemVerilogLexer': ('pip._vendor.pygments.lexers.hdl', 'systemverilog', ('systemverilog', 'sv'), ('*.sv', '*.svh'), ('text/x-systemverilog',)),
+    'TAPLexer': ('pip._vendor.pygments.lexers.testing', 'TAP', ('tap',), ('*.tap',), ()),
+    'TNTLexer': ('pip._vendor.pygments.lexers.tnt', 'Typographic Number Theory', ('tnt',), ('*.tnt',), ()),
+    'TOMLLexer': ('pip._vendor.pygments.lexers.configs', 'TOML', ('toml',), ('*.toml', 'Pipfile', 'poetry.lock'), ()),
+    'Tads3Lexer': ('pip._vendor.pygments.lexers.int_fiction', 'TADS 3', ('tads3',), ('*.t',), ()),
+    'TalLexer': ('pip._vendor.pygments.lexers.tal', 'Tal', ('tal', 'uxntal'), ('*.tal',), ('text/x-uxntal',)),
+    'TasmLexer': ('pip._vendor.pygments.lexers.asm', 'TASM', ('tasm',), ('*.asm', '*.ASM', '*.tasm'), ('text/x-tasm',)),
+    'TclLexer': ('pip._vendor.pygments.lexers.tcl', 'Tcl', ('tcl',), ('*.tcl', '*.rvt'), ('text/x-tcl', 'text/x-script.tcl', 'application/x-tcl')),
+    'TcshLexer': ('pip._vendor.pygments.lexers.shell', 'Tcsh', ('tcsh', 'csh'), ('*.tcsh', '*.csh'), ('application/x-csh',)),
+    'TcshSessionLexer': ('pip._vendor.pygments.lexers.shell', 'Tcsh Session', ('tcshcon',), (), ()),
+    'TeaTemplateLexer': ('pip._vendor.pygments.lexers.templates', 'Tea', ('tea',), ('*.tea',), ('text/x-tea',)),
+    'TealLexer': ('pip._vendor.pygments.lexers.teal', 'teal', ('teal',), ('*.teal',), ()),
+    'TeraTermLexer': ('pip._vendor.pygments.lexers.teraterm', 'Tera Term macro', ('teratermmacro', 'teraterm', 'ttl'), ('*.ttl',), ('text/x-teratermmacro',)),
+    'TermcapLexer': ('pip._vendor.pygments.lexers.configs', 'Termcap', ('termcap',), ('termcap', 'termcap.src'), ()),
+    'TerminfoLexer': ('pip._vendor.pygments.lexers.configs', 'Terminfo', ('terminfo',), ('terminfo', 'terminfo.src'), ()),
+    'TerraformLexer': ('pip._vendor.pygments.lexers.configs', 'Terraform', ('terraform', 'tf'), ('*.tf',), ('application/x-tf', 'application/x-terraform')),
+    'TexLexer': ('pip._vendor.pygments.lexers.markup', 'TeX', ('tex', 'latex'), ('*.tex', '*.aux', '*.toc'), ('text/x-tex', 'text/x-latex')),
+    'TextLexer': ('pip._vendor.pygments.lexers.special', 'Text only', ('text',), ('*.txt',), ('text/plain',)),
+    'ThingsDBLexer': ('pip._vendor.pygments.lexers.thingsdb', 'ThingsDB', ('ti', 'thingsdb'), ('*.ti',), ()),
+    'ThriftLexer': ('pip._vendor.pygments.lexers.dsls', 'Thrift', ('thrift',), ('*.thrift',), ('application/x-thrift',)),
+    'TiddlyWiki5Lexer': ('pip._vendor.pygments.lexers.markup', 'tiddler', ('tid',), ('*.tid',), ('text/vnd.tiddlywiki',)),
+    'TodotxtLexer': ('pip._vendor.pygments.lexers.textfmts', 'Todotxt', ('todotxt',), ('todo.txt', '*.todotxt'), ('text/x-todo',)),
+    'TransactSqlLexer': ('pip._vendor.pygments.lexers.sql', 'Transact-SQL', ('tsql', 't-sql'), ('*.sql',), ('text/x-tsql',)),
+    'TreetopLexer': ('pip._vendor.pygments.lexers.parsers', 'Treetop', ('treetop',), ('*.treetop', '*.tt'), ()),
+    'TurtleLexer': ('pip._vendor.pygments.lexers.rdf', 'Turtle', ('turtle',), ('*.ttl',), ('text/turtle', 'application/x-turtle')),
+    'TwigHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Twig', ('html+twig',), ('*.twig',), ('text/html+twig',)),
+    'TwigLexer': ('pip._vendor.pygments.lexers.templates', 'Twig', ('twig',), (), ('application/x-twig',)),
+    'TypeScriptLexer': ('pip._vendor.pygments.lexers.javascript', 'TypeScript', ('typescript', 'ts'), ('*.ts',), ('application/x-typescript', 'text/x-typescript')),
+    'TypoScriptCssDataLexer': ('pip._vendor.pygments.lexers.typoscript', 'TypoScriptCssData', ('typoscriptcssdata',), (), ()),
+    'TypoScriptHtmlDataLexer': ('pip._vendor.pygments.lexers.typoscript', 'TypoScriptHtmlData', ('typoscripthtmldata',), (), ()),
+    'TypoScriptLexer': ('pip._vendor.pygments.lexers.typoscript', 'TypoScript', ('typoscript',), ('*.typoscript',), ('text/x-typoscript',)),
+    'UL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'UL4', ('ul4',), ('*.ul4',), ()),
+    'UcodeLexer': ('pip._vendor.pygments.lexers.unicon', 'ucode', ('ucode',), ('*.u', '*.u1', '*.u2'), ()),
+    'UniconLexer': ('pip._vendor.pygments.lexers.unicon', 'Unicon', ('unicon',), ('*.icn',), ('text/unicon',)),
+    'UnixConfigLexer': ('pip._vendor.pygments.lexers.configs', 'Unix/Linux config files', ('unixconfig', 'linuxconfig'), (), ()),
+    'UrbiscriptLexer': ('pip._vendor.pygments.lexers.urbi', 'UrbiScript', ('urbiscript',), ('*.u',), ('application/x-urbiscript',)),
+    'UsdLexer': ('pip._vendor.pygments.lexers.usd', 'USD', ('usd', 'usda'), ('*.usd', '*.usda'), ()),
+    'VBScriptLexer': ('pip._vendor.pygments.lexers.basic', 'VBScript', ('vbscript',), ('*.vbs', '*.VBS'), ()),
+    'VCLLexer': ('pip._vendor.pygments.lexers.varnish', 'VCL', ('vcl',), ('*.vcl',), ('text/x-vclsrc',)),
+    'VCLSnippetLexer': ('pip._vendor.pygments.lexers.varnish', 'VCLSnippets', ('vclsnippets', 'vclsnippet'), (), ('text/x-vclsnippet',)),
+    'VCTreeStatusLexer': ('pip._vendor.pygments.lexers.console', 'VCTreeStatus', ('vctreestatus',), (), ()),
+    'VGLLexer': ('pip._vendor.pygments.lexers.dsls', 'VGL', ('vgl',), ('*.rpf',), ()),
+    'ValaLexer': ('pip._vendor.pygments.lexers.c_like', 'Vala', ('vala', 'vapi'), ('*.vala', '*.vapi'), ('text/x-vala',)),
+    'VbNetAspxLexer': ('pip._vendor.pygments.lexers.dotnet', 'aspx-vb', ('aspx-vb',), ('*.aspx', '*.asax', '*.ascx', '*.ashx', '*.asmx', '*.axd'), ()),
+    'VbNetLexer': ('pip._vendor.pygments.lexers.dotnet', 'VB.net', ('vb.net', 'vbnet', 'lobas', 'oobas', 'sobas'), ('*.vb', '*.bas'), ('text/x-vbnet', 'text/x-vba')),
+    'VelocityHtmlLexer': ('pip._vendor.pygments.lexers.templates', 'HTML+Velocity', ('html+velocity',), (), ('text/html+velocity',)),
+    'VelocityLexer': ('pip._vendor.pygments.lexers.templates', 'Velocity', ('velocity',), ('*.vm', '*.fhtml'), ()),
+    'VelocityXmlLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Velocity', ('xml+velocity',), (), ('application/xml+velocity',)),
+    'VerilogLexer': ('pip._vendor.pygments.lexers.hdl', 'verilog', ('verilog', 'v'), ('*.v',), ('text/x-verilog',)),
+    'VhdlLexer': ('pip._vendor.pygments.lexers.hdl', 'vhdl', ('vhdl',), ('*.vhdl', '*.vhd'), ('text/x-vhdl',)),
+    'VimLexer': ('pip._vendor.pygments.lexers.textedit', 'VimL', ('vim',), ('*.vim', '.vimrc', '.exrc', '.gvimrc', '_vimrc', '_exrc', '_gvimrc', 'vimrc', 'gvimrc'), ('text/x-vim',)),
+    'WDiffLexer': ('pip._vendor.pygments.lexers.diff', 'WDiff', ('wdiff',), ('*.wdiff',), ()),
+    'WatLexer': ('pip._vendor.pygments.lexers.webassembly', 'WebAssembly', ('wast', 'wat'), ('*.wat', '*.wast'), ()),
+    'WebIDLLexer': ('pip._vendor.pygments.lexers.webidl', 'Web IDL', ('webidl',), ('*.webidl',), ()),
+    'WhileyLexer': ('pip._vendor.pygments.lexers.whiley', 'Whiley', ('whiley',), ('*.whiley',), ('text/x-whiley',)),
+    'X10Lexer': ('pip._vendor.pygments.lexers.x10', 'X10', ('x10', 'xten'), ('*.x10',), ('text/x-x10',)),
+    'XMLUL4Lexer': ('pip._vendor.pygments.lexers.ul4', 'XML+UL4', ('xml+ul4',), ('*.xmlul4',), ()),
+    'XQueryLexer': ('pip._vendor.pygments.lexers.webmisc', 'XQuery', ('xquery', 'xqy', 'xq', 'xql', 'xqm'), ('*.xqy', '*.xquery', '*.xq', '*.xql', '*.xqm'), ('text/xquery', 'application/xquery')),
+    'XmlDjangoLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Django/Jinja', ('xml+django', 'xml+jinja'), ('*.xml.j2', '*.xml.jinja2'), ('application/xml+django', 'application/xml+jinja')),
+    'XmlErbLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Ruby', ('xml+ruby', 'xml+erb'), (), ('application/xml+ruby',)),
+    'XmlLexer': ('pip._vendor.pygments.lexers.html', 'XML', ('xml',), ('*.xml', '*.xsl', '*.rss', '*.xslt', '*.xsd', '*.wsdl', '*.wsf'), ('text/xml', 'application/xml', 'image/svg+xml', 'application/rss+xml', 'application/atom+xml')),
+    'XmlPhpLexer': ('pip._vendor.pygments.lexers.templates', 'XML+PHP', ('xml+php',), (), ('application/xml+php',)),
+    'XmlSmartyLexer': ('pip._vendor.pygments.lexers.templates', 'XML+Smarty', ('xml+smarty',), (), ('application/xml+smarty',)),
+    'XorgLexer': ('pip._vendor.pygments.lexers.xorg', 'Xorg', ('xorg.conf',), ('xorg.conf',), ()),
+    'XsltLexer': ('pip._vendor.pygments.lexers.html', 'XSLT', ('xslt',), ('*.xsl', '*.xslt', '*.xpl'), ('application/xsl+xml', 'application/xslt+xml')),
+    'XtendLexer': ('pip._vendor.pygments.lexers.jvm', 'Xtend', ('xtend',), ('*.xtend',), ('text/x-xtend',)),
+    'XtlangLexer': ('pip._vendor.pygments.lexers.lisp', 'xtlang', ('extempore',), ('*.xtm',), ()),
+    'YamlJinjaLexer': ('pip._vendor.pygments.lexers.templates', 'YAML+Jinja', ('yaml+jinja', 'salt', 'sls'), ('*.sls', '*.yaml.j2', '*.yml.j2', '*.yaml.jinja2', '*.yml.jinja2'), ('text/x-yaml+jinja', 'text/x-sls')),
+    'YamlLexer': ('pip._vendor.pygments.lexers.data', 'YAML', ('yaml',), ('*.yaml', '*.yml'), ('text/x-yaml',)),
+    'YangLexer': ('pip._vendor.pygments.lexers.yang', 'YANG', ('yang',), ('*.yang',), ('application/yang',)),
+    'ZeekLexer': ('pip._vendor.pygments.lexers.dsls', 'Zeek', ('zeek', 'bro'), ('*.zeek', '*.bro'), ()),
+    'ZephirLexer': ('pip._vendor.pygments.lexers.php', 'Zephir', ('zephir',), ('*.zep',), ()),
+    'ZigLexer': ('pip._vendor.pygments.lexers.zig', 'Zig', ('zig',), ('*.zig',), ('text/zig',)),
+    'apdlexer': ('pip._vendor.pygments.lexers.apdlexer', 'ANSYS parametric design language', ('ansys', 'apdl'), ('*.ans',), ()),
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/python.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/python.py
new file mode 100644
index 0000000..c24e3c8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/lexers/python.py
@@ -0,0 +1,1204 @@
+"""
+    pygments.lexers.python
+    ~~~~~~~~~~~~~~~~~~~~~~
+
+    Lexers for Python and related languages.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+import keyword
+
+from pip._vendor.pygments.lexer import Lexer, RegexLexer, include, bygroups, using, \
+    default, words, combined, do_insertions, this
+from pip._vendor.pygments.util import get_bool_opt, shebang_matches
+from pip._vendor.pygments.token import Text, Comment, Operator, Keyword, Name, String, \
+    Number, Punctuation, Generic, Other, Error
+from pip._vendor.pygments import unistring as uni
+
+__all__ = ['PythonLexer', 'PythonConsoleLexer', 'PythonTracebackLexer',
+           'Python2Lexer', 'Python2TracebackLexer',
+           'CythonLexer', 'DgLexer', 'NumPyLexer']
+
+line_re = re.compile('.*?\n')
+
+
+class PythonLexer(RegexLexer):
+    """
+    For Python source code (version 3.x).
+
+    .. versionadded:: 0.10
+
+    .. versionchanged:: 2.5
+       This is now the default ``PythonLexer``.  It is still available as the
+       alias ``Python3Lexer``.
+    """
+
+    name = 'Python'
+    url = 'http://www.python.org'
+    aliases = ['python', 'py', 'sage', 'python3', 'py3']
+    filenames = [
+        '*.py',
+        '*.pyw',
+        # Jython
+        '*.jy',
+        # Sage
+        '*.sage',
+        # SCons
+        '*.sc',
+        'SConstruct',
+        'SConscript',
+        # Skylark/Starlark (used by Bazel, Buck, and Pants)
+        '*.bzl',
+        'BUCK',
+        'BUILD',
+        'BUILD.bazel',
+        'WORKSPACE',
+        # Twisted Application infrastructure
+        '*.tac',
+    ]
+    mimetypes = ['text/x-python', 'application/x-python',
+                 'text/x-python3', 'application/x-python3']
+
+    uni_name = "[%s][%s]*" % (uni.xid_start, uni.xid_continue)
+
+    def innerstring_rules(ttype):
+        return [
+            # the old style '%s' % (...) string formatting (still valid in Py3)
+            (r'%(\(\w+\))?[-#0 +]*([0-9]+|[*])?(\.([0-9]+|[*]))?'
+             '[hlL]?[E-GXc-giorsaux%]', String.Interpol),
+            # the new style '{}'.format(...) string formatting
+            (r'\{'
+             r'((\w+)((\.\w+)|(\[[^\]]+\]))*)?'  # field name
+             r'(\![sra])?'                       # conversion
+             r'(\:(.?[<>=\^])?[-+ ]?#?0?(\d+)?,?(\.\d+)?[E-GXb-gnosx%]?)?'
+             r'\}', String.Interpol),
+
+            # backslashes, quotes and formatting signs must be parsed one at a time
+            (r'[^\\\'"%{\n]+', ttype),
+            (r'[\'"\\]', ttype),
+            # unhandled string formatting sign
+            (r'%|(\{{1,2})', ttype)
+            # newlines are an error (use "nl" state)
+        ]
+
+    def fstring_rules(ttype):
+        return [
+            # Assuming that a '}' is the closing brace after format specifier.
+            # Sadly, this means that we won't detect syntax error. But it's
+            # more important to parse correct syntax correctly, than to
+            # highlight invalid syntax.
+            (r'\}', String.Interpol),
+            (r'\{', String.Interpol, 'expr-inside-fstring'),
+            # backslashes, quotes and formatting signs must be parsed one at a time
+            (r'[^\\\'"{}\n]+', ttype),
+            (r'[\'"\\]', ttype),
+            # newlines are an error (use "nl" state)
+        ]
+
+    tokens = {
+        'root': [
+            (r'\n', Text),
+            (r'^(\s*)([rRuUbB]{,2})("""(?:.|\n)*?""")',
+             bygroups(Text, String.Affix, String.Doc)),
+            (r"^(\s*)([rRuUbB]{,2})('''(?:.|\n)*?''')",
+             bygroups(Text, String.Affix, String.Doc)),
+            (r'\A#!.+$', Comment.Hashbang),
+            (r'#.*$', Comment.Single),
+            (r'\\\n', Text),
+            (r'\\', Text),
+            include('keywords'),
+            include('soft-keywords'),
+            (r'(def)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'funcname'),
+            (r'(class)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'classname'),
+            (r'(from)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text),
+             'fromimport'),
+            (r'(import)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text),
+             'import'),
+            include('expr'),
+        ],
+        'expr': [
+            # raw f-strings
+            ('(?i)(rf|fr)(""")',
+             bygroups(String.Affix, String.Double),
+             combined('rfstringescape', 'tdqf')),
+            ("(?i)(rf|fr)(''')",
+             bygroups(String.Affix, String.Single),
+             combined('rfstringescape', 'tsqf')),
+            ('(?i)(rf|fr)(")',
+             bygroups(String.Affix, String.Double),
+             combined('rfstringescape', 'dqf')),
+            ("(?i)(rf|fr)(')",
+             bygroups(String.Affix, String.Single),
+             combined('rfstringescape', 'sqf')),
+            # non-raw f-strings
+            ('([fF])(""")', bygroups(String.Affix, String.Double),
+             combined('fstringescape', 'tdqf')),
+            ("([fF])(''')", bygroups(String.Affix, String.Single),
+             combined('fstringescape', 'tsqf')),
+            ('([fF])(")', bygroups(String.Affix, String.Double),
+             combined('fstringescape', 'dqf')),
+            ("([fF])(')", bygroups(String.Affix, String.Single),
+             combined('fstringescape', 'sqf')),
+            # raw bytes and strings
+            ('(?i)(rb|br|r)(""")',
+             bygroups(String.Affix, String.Double), 'tdqs'),
+            ("(?i)(rb|br|r)(''')",
+             bygroups(String.Affix, String.Single), 'tsqs'),
+            ('(?i)(rb|br|r)(")',
+             bygroups(String.Affix, String.Double), 'dqs'),
+            ("(?i)(rb|br|r)(')",
+             bygroups(String.Affix, String.Single), 'sqs'),
+            # non-raw strings
+            ('([uU]?)(""")', bygroups(String.Affix, String.Double),
+             combined('stringescape', 'tdqs')),
+            ("([uU]?)(''')", bygroups(String.Affix, String.Single),
+             combined('stringescape', 'tsqs')),
+            ('([uU]?)(")', bygroups(String.Affix, String.Double),
+             combined('stringescape', 'dqs')),
+            ("([uU]?)(')", bygroups(String.Affix, String.Single),
+             combined('stringescape', 'sqs')),
+            # non-raw bytes
+            ('([bB])(""")', bygroups(String.Affix, String.Double),
+             combined('bytesescape', 'tdqs')),
+            ("([bB])(''')", bygroups(String.Affix, String.Single),
+             combined('bytesescape', 'tsqs')),
+            ('([bB])(")', bygroups(String.Affix, String.Double),
+             combined('bytesescape', 'dqs')),
+            ("([bB])(')", bygroups(String.Affix, String.Single),
+             combined('bytesescape', 'sqs')),
+            
+            (r'[^\S\n]+', Text),
+            include('numbers'),
+            (r'!=|==|<<|>>|:=|[-~+/*%=<>&^|.]', Operator),
+            (r'[]{}:(),;[]', Punctuation),
+            (r'(in|is|and|or|not)\b', Operator.Word),
+            include('expr-keywords'),
+            include('builtins'),
+            include('magicfuncs'),
+            include('magicvars'),
+            include('name'),
+        ],
+        'expr-inside-fstring': [
+            (r'[{([]', Punctuation, 'expr-inside-fstring-inner'),
+            # without format specifier
+            (r'(=\s*)?'         # debug (https://bugs.python.org/issue36817)
+             r'(\![sraf])?'     # conversion
+             r'\}', String.Interpol, '#pop'),
+            # with format specifier
+            # we'll catch the remaining '}' in the outer scope
+            (r'(=\s*)?'         # debug (https://bugs.python.org/issue36817)
+             r'(\![sraf])?'     # conversion
+             r':', String.Interpol, '#pop'),
+            (r'\s+', Text),  # allow new lines
+            include('expr'),
+        ],
+        'expr-inside-fstring-inner': [
+            (r'[{([]', Punctuation, 'expr-inside-fstring-inner'),
+            (r'[])}]', Punctuation, '#pop'),
+            (r'\s+', Text),  # allow new lines
+            include('expr'),
+        ],
+        'expr-keywords': [
+            # Based on https://docs.python.org/3/reference/expressions.html
+            (words((
+                'async for', 'await', 'else', 'for', 'if', 'lambda',
+                'yield', 'yield from'), suffix=r'\b'),
+             Keyword),
+            (words(('True', 'False', 'None'), suffix=r'\b'), Keyword.Constant),
+        ],
+        'keywords': [
+            (words((
+                'assert', 'async', 'await', 'break', 'continue', 'del', 'elif',
+                'else', 'except', 'finally', 'for', 'global', 'if', 'lambda',
+                'pass', 'raise', 'nonlocal', 'return', 'try', 'while', 'yield',
+                'yield from', 'as', 'with'), suffix=r'\b'),
+             Keyword),
+            (words(('True', 'False', 'None'), suffix=r'\b'), Keyword.Constant),
+        ],
+        'soft-keywords': [
+            # `match`, `case` and `_` soft keywords
+            (r'(^[ \t]*)'              # at beginning of line + possible indentation
+             r'(match|case)\b'         # a possible keyword
+             r'(?![ \t]*(?:'           # not followed by...
+             r'[:,;=^&|@~)\]}]|(?:' +  # characters and keywords that mean this isn't
+             r'|'.join(keyword.kwlist) + r')\b))',                 # pattern matching
+             bygroups(Text, Keyword), 'soft-keywords-inner'),
+        ],
+        'soft-keywords-inner': [
+            # optional `_` keyword
+            (r'(\s+)([^\n_]*)(_\b)', bygroups(Text, using(this), Keyword)),
+            default('#pop')
+        ],
+        'builtins': [
+            (words((
+                '__import__', 'abs', 'all', 'any', 'bin', 'bool', 'bytearray',
+                'breakpoint', 'bytes', 'chr', 'classmethod', 'compile', 'complex',
+                'delattr', 'dict', 'dir', 'divmod', 'enumerate', 'eval', 'filter',
+                'float', 'format', 'frozenset', 'getattr', 'globals', 'hasattr',
+                'hash', 'hex', 'id', 'input', 'int', 'isinstance', 'issubclass',
+                'iter', 'len', 'list', 'locals', 'map', 'max', 'memoryview',
+                'min', 'next', 'object', 'oct', 'open', 'ord', 'pow', 'print',
+                'property', 'range', 'repr', 'reversed', 'round', 'set', 'setattr',
+                'slice', 'sorted', 'staticmethod', 'str', 'sum', 'super', 'tuple',
+                'type', 'vars', 'zip'), prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Builtin),
+            (r'(?<!\.)(self|Ellipsis|NotImplemented|cls)\b', Name.Builtin.Pseudo),
+            (words((
+                'ArithmeticError', 'AssertionError', 'AttributeError',
+                'BaseException', 'BufferError', 'BytesWarning', 'DeprecationWarning',
+                'EOFError', 'EnvironmentError', 'Exception', 'FloatingPointError',
+                'FutureWarning', 'GeneratorExit', 'IOError', 'ImportError',
+                'ImportWarning', 'IndentationError', 'IndexError', 'KeyError',
+                'KeyboardInterrupt', 'LookupError', 'MemoryError', 'NameError',
+                'NotImplementedError', 'OSError', 'OverflowError',
+                'PendingDeprecationWarning', 'ReferenceError', 'ResourceWarning',
+                'RuntimeError', 'RuntimeWarning', 'StopIteration',
+                'SyntaxError', 'SyntaxWarning', 'SystemError', 'SystemExit',
+                'TabError', 'TypeError', 'UnboundLocalError', 'UnicodeDecodeError',
+                'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError',
+                'UnicodeWarning', 'UserWarning', 'ValueError', 'VMSError',
+                'Warning', 'WindowsError', 'ZeroDivisionError',
+                # new builtin exceptions from PEP 3151
+                'BlockingIOError', 'ChildProcessError', 'ConnectionError',
+                'BrokenPipeError', 'ConnectionAbortedError', 'ConnectionRefusedError',
+                'ConnectionResetError', 'FileExistsError', 'FileNotFoundError',
+                'InterruptedError', 'IsADirectoryError', 'NotADirectoryError',
+                'PermissionError', 'ProcessLookupError', 'TimeoutError',
+                # others new in Python 3
+                'StopAsyncIteration', 'ModuleNotFoundError', 'RecursionError',
+                'EncodingWarning'),
+                prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Exception),
+        ],
+        'magicfuncs': [
+            (words((
+                '__abs__', '__add__', '__aenter__', '__aexit__', '__aiter__',
+                '__and__', '__anext__', '__await__', '__bool__', '__bytes__',
+                '__call__', '__complex__', '__contains__', '__del__', '__delattr__',
+                '__delete__', '__delitem__', '__dir__', '__divmod__', '__enter__',
+                '__eq__', '__exit__', '__float__', '__floordiv__', '__format__',
+                '__ge__', '__get__', '__getattr__', '__getattribute__',
+                '__getitem__', '__gt__', '__hash__', '__iadd__', '__iand__',
+                '__ifloordiv__', '__ilshift__', '__imatmul__', '__imod__',
+                '__imul__', '__index__', '__init__', '__instancecheck__',
+                '__int__', '__invert__', '__ior__', '__ipow__', '__irshift__',
+                '__isub__', '__iter__', '__itruediv__', '__ixor__', '__le__',
+                '__len__', '__length_hint__', '__lshift__', '__lt__', '__matmul__',
+                '__missing__', '__mod__', '__mul__', '__ne__', '__neg__',
+                '__new__', '__next__', '__or__', '__pos__', '__pow__',
+                '__prepare__', '__radd__', '__rand__', '__rdivmod__', '__repr__',
+                '__reversed__', '__rfloordiv__', '__rlshift__', '__rmatmul__',
+                '__rmod__', '__rmul__', '__ror__', '__round__', '__rpow__',
+                '__rrshift__', '__rshift__', '__rsub__', '__rtruediv__',
+                '__rxor__', '__set__', '__setattr__', '__setitem__', '__str__',
+                '__sub__', '__subclasscheck__', '__truediv__',
+                '__xor__'), suffix=r'\b'),
+             Name.Function.Magic),
+        ],
+        'magicvars': [
+            (words((
+                '__annotations__', '__bases__', '__class__', '__closure__',
+                '__code__', '__defaults__', '__dict__', '__doc__', '__file__',
+                '__func__', '__globals__', '__kwdefaults__', '__module__',
+                '__mro__', '__name__', '__objclass__', '__qualname__',
+                '__self__', '__slots__', '__weakref__'), suffix=r'\b'),
+             Name.Variable.Magic),
+        ],
+        'numbers': [
+            (r'(\d(?:_?\d)*\.(?:\d(?:_?\d)*)?|(?:\d(?:_?\d)*)?\.\d(?:_?\d)*)'
+             r'([eE][+-]?\d(?:_?\d)*)?', Number.Float),
+            (r'\d(?:_?\d)*[eE][+-]?\d(?:_?\d)*j?', Number.Float),
+            (r'0[oO](?:_?[0-7])+', Number.Oct),
+            (r'0[bB](?:_?[01])+', Number.Bin),
+            (r'0[xX](?:_?[a-fA-F0-9])+', Number.Hex),
+            (r'\d(?:_?\d)*', Number.Integer),
+        ],
+        'name': [
+            (r'@' + uni_name, Name.Decorator),
+            (r'@', Operator),  # new matrix multiplication operator
+            (uni_name, Name),
+        ],
+        'funcname': [
+            include('magicfuncs'),
+            (uni_name, Name.Function, '#pop'),
+            default('#pop'),
+        ],
+        'classname': [
+            (uni_name, Name.Class, '#pop'),
+        ],
+        'import': [
+            (r'(\s+)(as)(\s+)', bygroups(Text, Keyword, Text)),
+            (r'\.', Name.Namespace),
+            (uni_name, Name.Namespace),
+            (r'(\s*)(,)(\s*)', bygroups(Text, Operator, Text)),
+            default('#pop')  # all else: go back
+        ],
+        'fromimport': [
+            (r'(\s+)(import)\b', bygroups(Text, Keyword.Namespace), '#pop'),
+            (r'\.', Name.Namespace),
+            # if None occurs here, it's "raise x from None", since None can
+            # never be a module name
+            (r'None\b', Name.Builtin.Pseudo, '#pop'),
+            (uni_name, Name.Namespace),
+            default('#pop'),
+        ],
+        'rfstringescape': [
+            (r'\{\{', String.Escape),
+            (r'\}\}', String.Escape),
+        ],
+        'fstringescape': [
+            include('rfstringescape'),
+            include('stringescape'),
+        ],
+        'bytesescape': [
+            (r'\\([\\abfnrtv"\']|\n|x[a-fA-F0-9]{2}|[0-7]{1,3})', String.Escape)
+        ],
+        'stringescape': [
+            (r'\\(N\{.*?\}|u[a-fA-F0-9]{4}|U[a-fA-F0-9]{8})', String.Escape),
+            include('bytesescape')
+        ],
+        'fstrings-single': fstring_rules(String.Single),
+        'fstrings-double': fstring_rules(String.Double),
+        'strings-single': innerstring_rules(String.Single),
+        'strings-double': innerstring_rules(String.Double),
+        'dqf': [
+            (r'"', String.Double, '#pop'),
+            (r'\\\\|\\"|\\\n', String.Escape),  # included here for raw strings
+            include('fstrings-double')
+        ],
+        'sqf': [
+            (r"'", String.Single, '#pop'),
+            (r"\\\\|\\'|\\\n", String.Escape),  # included here for raw strings
+            include('fstrings-single')
+        ],
+        'dqs': [
+            (r'"', String.Double, '#pop'),
+            (r'\\\\|\\"|\\\n', String.Escape),  # included here for raw strings
+            include('strings-double')
+        ],
+        'sqs': [
+            (r"'", String.Single, '#pop'),
+            (r"\\\\|\\'|\\\n", String.Escape),  # included here for raw strings
+            include('strings-single')
+        ],
+        'tdqf': [
+            (r'"""', String.Double, '#pop'),
+            include('fstrings-double'),
+            (r'\n', String.Double)
+        ],
+        'tsqf': [
+            (r"'''", String.Single, '#pop'),
+            include('fstrings-single'),
+            (r'\n', String.Single)
+        ],
+        'tdqs': [
+            (r'"""', String.Double, '#pop'),
+            include('strings-double'),
+            (r'\n', String.Double)
+        ],
+        'tsqs': [
+            (r"'''", String.Single, '#pop'),
+            include('strings-single'),
+            (r'\n', String.Single)
+        ],
+    }
+
+    def analyse_text(text):
+        return shebang_matches(text, r'pythonw?(3(\.\d)?)?') or \
+            'import ' in text[:1000]
+
+
+Python3Lexer = PythonLexer
+
+
+class Python2Lexer(RegexLexer):
+    """
+    For Python 2.x source code.
+
+    .. versionchanged:: 2.5
+       This class has been renamed from ``PythonLexer``.  ``PythonLexer`` now
+       refers to the Python 3 variant.  File name patterns like ``*.py`` have
+       been moved to Python 3 as well.
+    """
+
+    name = 'Python 2.x'
+    url = 'http://www.python.org'
+    aliases = ['python2', 'py2']
+    filenames = []  # now taken over by PythonLexer (3.x)
+    mimetypes = ['text/x-python2', 'application/x-python2']
+
+    def innerstring_rules(ttype):
+        return [
+            # the old style '%s' % (...) string formatting
+            (r'%(\(\w+\))?[-#0 +]*([0-9]+|[*])?(\.([0-9]+|[*]))?'
+             '[hlL]?[E-GXc-giorsux%]', String.Interpol),
+            # backslashes, quotes and formatting signs must be parsed one at a time
+            (r'[^\\\'"%\n]+', ttype),
+            (r'[\'"\\]', ttype),
+            # unhandled string formatting sign
+            (r'%', ttype),
+            # newlines are an error (use "nl" state)
+        ]
+
+    tokens = {
+        'root': [
+            (r'\n', Text),
+            (r'^(\s*)([rRuUbB]{,2})("""(?:.|\n)*?""")',
+             bygroups(Text, String.Affix, String.Doc)),
+            (r"^(\s*)([rRuUbB]{,2})('''(?:.|\n)*?''')",
+             bygroups(Text, String.Affix, String.Doc)),
+            (r'[^\S\n]+', Text),
+            (r'\A#!.+$', Comment.Hashbang),
+            (r'#.*$', Comment.Single),
+            (r'[]{}:(),;[]', Punctuation),
+            (r'\\\n', Text),
+            (r'\\', Text),
+            (r'(in|is|and|or|not)\b', Operator.Word),
+            (r'!=|==|<<|>>|[-~+/*%=<>&^|.]', Operator),
+            include('keywords'),
+            (r'(def)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'funcname'),
+            (r'(class)((?:\s|\\\s)+)', bygroups(Keyword, Text), 'classname'),
+            (r'(from)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text),
+             'fromimport'),
+            (r'(import)((?:\s|\\\s)+)', bygroups(Keyword.Namespace, Text),
+             'import'),
+            include('builtins'),
+            include('magicfuncs'),
+            include('magicvars'),
+            include('backtick'),
+            ('([rR]|[uUbB][rR]|[rR][uUbB])(""")',
+             bygroups(String.Affix, String.Double), 'tdqs'),
+            ("([rR]|[uUbB][rR]|[rR][uUbB])(''')",
+             bygroups(String.Affix, String.Single), 'tsqs'),
+            ('([rR]|[uUbB][rR]|[rR][uUbB])(")',
+             bygroups(String.Affix, String.Double), 'dqs'),
+            ("([rR]|[uUbB][rR]|[rR][uUbB])(')",
+             bygroups(String.Affix, String.Single), 'sqs'),
+            ('([uUbB]?)(""")', bygroups(String.Affix, String.Double),
+             combined('stringescape', 'tdqs')),
+            ("([uUbB]?)(''')", bygroups(String.Affix, String.Single),
+             combined('stringescape', 'tsqs')),
+            ('([uUbB]?)(")', bygroups(String.Affix, String.Double),
+             combined('stringescape', 'dqs')),
+            ("([uUbB]?)(')", bygroups(String.Affix, String.Single),
+             combined('stringescape', 'sqs')),
+            include('name'),
+            include('numbers'),
+        ],
+        'keywords': [
+            (words((
+                'assert', 'break', 'continue', 'del', 'elif', 'else', 'except',
+                'exec', 'finally', 'for', 'global', 'if', 'lambda', 'pass',
+                'print', 'raise', 'return', 'try', 'while', 'yield',
+                'yield from', 'as', 'with'), suffix=r'\b'),
+             Keyword),
+        ],
+        'builtins': [
+            (words((
+                '__import__', 'abs', 'all', 'any', 'apply', 'basestring', 'bin',
+                'bool', 'buffer', 'bytearray', 'bytes', 'callable', 'chr', 'classmethod',
+                'cmp', 'coerce', 'compile', 'complex', 'delattr', 'dict', 'dir', 'divmod',
+                'enumerate', 'eval', 'execfile', 'exit', 'file', 'filter', 'float',
+                'frozenset', 'getattr', 'globals', 'hasattr', 'hash', 'hex', 'id',
+                'input', 'int', 'intern', 'isinstance', 'issubclass', 'iter', 'len',
+                'list', 'locals', 'long', 'map', 'max', 'min', 'next', 'object',
+                'oct', 'open', 'ord', 'pow', 'property', 'range', 'raw_input', 'reduce',
+                'reload', 'repr', 'reversed', 'round', 'set', 'setattr', 'slice',
+                'sorted', 'staticmethod', 'str', 'sum', 'super', 'tuple', 'type',
+                'unichr', 'unicode', 'vars', 'xrange', 'zip'),
+                prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Builtin),
+            (r'(?<!\.)(self|None|Ellipsis|NotImplemented|False|True|cls'
+             r')\b', Name.Builtin.Pseudo),
+            (words((
+                'ArithmeticError', 'AssertionError', 'AttributeError',
+                'BaseException', 'DeprecationWarning', 'EOFError', 'EnvironmentError',
+                'Exception', 'FloatingPointError', 'FutureWarning', 'GeneratorExit',
+                'IOError', 'ImportError', 'ImportWarning', 'IndentationError',
+                'IndexError', 'KeyError', 'KeyboardInterrupt', 'LookupError',
+                'MemoryError', 'NameError',
+                'NotImplementedError', 'OSError', 'OverflowError', 'OverflowWarning',
+                'PendingDeprecationWarning', 'ReferenceError',
+                'RuntimeError', 'RuntimeWarning', 'StandardError', 'StopIteration',
+                'SyntaxError', 'SyntaxWarning', 'SystemError', 'SystemExit',
+                'TabError', 'TypeError', 'UnboundLocalError', 'UnicodeDecodeError',
+                'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError',
+                'UnicodeWarning', 'UserWarning', 'ValueError', 'VMSError', 'Warning',
+                'WindowsError', 'ZeroDivisionError'), prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Exception),
+        ],
+        'magicfuncs': [
+            (words((
+                '__abs__', '__add__', '__and__', '__call__', '__cmp__', '__coerce__',
+                '__complex__', '__contains__', '__del__', '__delattr__', '__delete__',
+                '__delitem__', '__delslice__', '__div__', '__divmod__', '__enter__',
+                '__eq__', '__exit__', '__float__', '__floordiv__', '__ge__', '__get__',
+                '__getattr__', '__getattribute__', '__getitem__', '__getslice__', '__gt__',
+                '__hash__', '__hex__', '__iadd__', '__iand__', '__idiv__', '__ifloordiv__',
+                '__ilshift__', '__imod__', '__imul__', '__index__', '__init__',
+                '__instancecheck__', '__int__', '__invert__', '__iop__', '__ior__',
+                '__ipow__', '__irshift__', '__isub__', '__iter__', '__itruediv__',
+                '__ixor__', '__le__', '__len__', '__long__', '__lshift__', '__lt__',
+                '__missing__', '__mod__', '__mul__', '__ne__', '__neg__', '__new__',
+                '__nonzero__', '__oct__', '__op__', '__or__', '__pos__', '__pow__',
+                '__radd__', '__rand__', '__rcmp__', '__rdiv__', '__rdivmod__', '__repr__',
+                '__reversed__', '__rfloordiv__', '__rlshift__', '__rmod__', '__rmul__',
+                '__rop__', '__ror__', '__rpow__', '__rrshift__', '__rshift__', '__rsub__',
+                '__rtruediv__', '__rxor__', '__set__', '__setattr__', '__setitem__',
+                '__setslice__', '__str__', '__sub__', '__subclasscheck__', '__truediv__',
+                '__unicode__', '__xor__'), suffix=r'\b'),
+             Name.Function.Magic),
+        ],
+        'magicvars': [
+            (words((
+                '__bases__', '__class__', '__closure__', '__code__', '__defaults__',
+                '__dict__', '__doc__', '__file__', '__func__', '__globals__',
+                '__metaclass__', '__module__', '__mro__', '__name__', '__self__',
+                '__slots__', '__weakref__'),
+                suffix=r'\b'),
+             Name.Variable.Magic),
+        ],
+        'numbers': [
+            (r'(\d+\.\d*|\d*\.\d+)([eE][+-]?[0-9]+)?j?', Number.Float),
+            (r'\d+[eE][+-]?[0-9]+j?', Number.Float),
+            (r'0[0-7]+j?', Number.Oct),
+            (r'0[bB][01]+', Number.Bin),
+            (r'0[xX][a-fA-F0-9]+', Number.Hex),
+            (r'\d+L', Number.Integer.Long),
+            (r'\d+j?', Number.Integer)
+        ],
+        'backtick': [
+            ('`.*?`', String.Backtick),
+        ],
+        'name': [
+            (r'@[\w.]+', Name.Decorator),
+            (r'[a-zA-Z_]\w*', Name),
+        ],
+        'funcname': [
+            include('magicfuncs'),
+            (r'[a-zA-Z_]\w*', Name.Function, '#pop'),
+            default('#pop'),
+        ],
+        'classname': [
+            (r'[a-zA-Z_]\w*', Name.Class, '#pop')
+        ],
+        'import': [
+            (r'(?:[ \t]|\\\n)+', Text),
+            (r'as\b', Keyword.Namespace),
+            (r',', Operator),
+            (r'[a-zA-Z_][\w.]*', Name.Namespace),
+            default('#pop')  # all else: go back
+        ],
+        'fromimport': [
+            (r'(?:[ \t]|\\\n)+', Text),
+            (r'import\b', Keyword.Namespace, '#pop'),
+            # if None occurs here, it's "raise x from None", since None can
+            # never be a module name
+            (r'None\b', Name.Builtin.Pseudo, '#pop'),
+            # sadly, in "raise x from y" y will be highlighted as namespace too
+            (r'[a-zA-Z_.][\w.]*', Name.Namespace),
+            # anything else here also means "raise x from y" and is therefore
+            # not an error
+            default('#pop'),
+        ],
+        'stringescape': [
+            (r'\\([\\abfnrtv"\']|\n|N\{.*?\}|u[a-fA-F0-9]{4}|'
+             r'U[a-fA-F0-9]{8}|x[a-fA-F0-9]{2}|[0-7]{1,3})', String.Escape)
+        ],
+        'strings-single': innerstring_rules(String.Single),
+        'strings-double': innerstring_rules(String.Double),
+        'dqs': [
+            (r'"', String.Double, '#pop'),
+            (r'\\\\|\\"|\\\n', String.Escape),  # included here for raw strings
+            include('strings-double')
+        ],
+        'sqs': [
+            (r"'", String.Single, '#pop'),
+            (r"\\\\|\\'|\\\n", String.Escape),  # included here for raw strings
+            include('strings-single')
+        ],
+        'tdqs': [
+            (r'"""', String.Double, '#pop'),
+            include('strings-double'),
+            (r'\n', String.Double)
+        ],
+        'tsqs': [
+            (r"'''", String.Single, '#pop'),
+            include('strings-single'),
+            (r'\n', String.Single)
+        ],
+    }
+
+    def analyse_text(text):
+        return shebang_matches(text, r'pythonw?2(\.\d)?')
+
+
+class PythonConsoleLexer(Lexer):
+    """
+    For Python console output or doctests, such as:
+
+    .. sourcecode:: pycon
+
+        >>> a = 'foo'
+        >>> print a
+        foo
+        >>> 1 / 0
+        Traceback (most recent call last):
+          File "<stdin>", line 1, in <module>
+        ZeroDivisionError: integer division or modulo by zero
+
+    Additional options:
+
+    `python3`
+        Use Python 3 lexer for code.  Default is ``True``.
+
+        .. versionadded:: 1.0
+        .. versionchanged:: 2.5
+           Now defaults to ``True``.
+    """
+    name = 'Python console session'
+    aliases = ['pycon']
+    mimetypes = ['text/x-python-doctest']
+
+    def __init__(self, **options):
+        self.python3 = get_bool_opt(options, 'python3', True)
+        Lexer.__init__(self, **options)
+
+    def get_tokens_unprocessed(self, text):
+        if self.python3:
+            pylexer = PythonLexer(**self.options)
+            tblexer = PythonTracebackLexer(**self.options)
+        else:
+            pylexer = Python2Lexer(**self.options)
+            tblexer = Python2TracebackLexer(**self.options)
+
+        curcode = ''
+        insertions = []
+        curtb = ''
+        tbindex = 0
+        tb = 0
+        for match in line_re.finditer(text):
+            line = match.group()
+            if line.startswith('>>> ') or line.startswith('... '):
+                tb = 0
+                insertions.append((len(curcode),
+                                   [(0, Generic.Prompt, line[:4])]))
+                curcode += line[4:]
+            elif line.rstrip() == '...' and not tb:
+                # only a new >>> prompt can end an exception block
+                # otherwise an ellipsis in place of the traceback frames
+                # will be mishandled
+                insertions.append((len(curcode),
+                                   [(0, Generic.Prompt, '...')]))
+                curcode += line[3:]
+            else:
+                if curcode:
+                    yield from do_insertions(
+                        insertions, pylexer.get_tokens_unprocessed(curcode))
+                    curcode = ''
+                    insertions = []
+                if (line.startswith('Traceback (most recent call last):') or
+                        re.match('  File "[^"]+", line \\d+\\n$', line)):
+                    tb = 1
+                    curtb = line
+                    tbindex = match.start()
+                elif line == 'KeyboardInterrupt\n':
+                    yield match.start(), Name.Class, line
+                elif tb:
+                    curtb += line
+                    if not (line.startswith(' ') or line.strip() == '...'):
+                        tb = 0
+                        for i, t, v in tblexer.get_tokens_unprocessed(curtb):
+                            yield tbindex+i, t, v
+                        curtb = ''
+                else:
+                    yield match.start(), Generic.Output, line
+        if curcode:
+            yield from do_insertions(insertions,
+                                     pylexer.get_tokens_unprocessed(curcode))
+        if curtb:
+            for i, t, v in tblexer.get_tokens_unprocessed(curtb):
+                yield tbindex+i, t, v
+
+
+class PythonTracebackLexer(RegexLexer):
+    """
+    For Python 3.x tracebacks, with support for chained exceptions.
+
+    .. versionadded:: 1.0
+
+    .. versionchanged:: 2.5
+       This is now the default ``PythonTracebackLexer``.  It is still available
+       as the alias ``Python3TracebackLexer``.
+    """
+
+    name = 'Python Traceback'
+    aliases = ['pytb', 'py3tb']
+    filenames = ['*.pytb', '*.py3tb']
+    mimetypes = ['text/x-python-traceback', 'text/x-python3-traceback']
+
+    tokens = {
+        'root': [
+            (r'\n', Text),
+            (r'^Traceback \(most recent call last\):\n', Generic.Traceback, 'intb'),
+            (r'^During handling of the above exception, another '
+             r'exception occurred:\n\n', Generic.Traceback),
+            (r'^The above exception was the direct cause of the '
+             r'following exception:\n\n', Generic.Traceback),
+            (r'^(?=  File "[^"]+", line \d+)', Generic.Traceback, 'intb'),
+            (r'^.*\n', Other),
+        ],
+        'intb': [
+            (r'^(  File )("[^"]+")(, line )(\d+)(, in )(.+)(\n)',
+             bygroups(Text, Name.Builtin, Text, Number, Text, Name, Text)),
+            (r'^(  File )("[^"]+")(, line )(\d+)(\n)',
+             bygroups(Text, Name.Builtin, Text, Number, Text)),
+            (r'^(    )(.+)(\n)',
+             bygroups(Text, using(PythonLexer), Text), 'markers'),
+            (r'^([ \t]*)(\.\.\.)(\n)',
+             bygroups(Text, Comment, Text)),  # for doctests...
+            (r'^([^:]+)(: )(.+)(\n)',
+             bygroups(Generic.Error, Text, Name, Text), '#pop'),
+            (r'^([a-zA-Z_][\w.]*)(:?\n)',
+             bygroups(Generic.Error, Text), '#pop')
+        ],
+        'markers': [
+            # Either `PEP 657 <https://www.python.org/dev/peps/pep-0657/>`
+            # error locations in Python 3.11+, or single-caret markers
+            # for syntax errors before that.
+            (r'^( {4,})([~^]+)(\n)',
+             bygroups(Text, Punctuation.Marker, Text),
+             '#pop'),
+            default('#pop'),
+        ],
+    }
+
+
+Python3TracebackLexer = PythonTracebackLexer
+
+
+class Python2TracebackLexer(RegexLexer):
+    """
+    For Python tracebacks.
+
+    .. versionadded:: 0.7
+
+    .. versionchanged:: 2.5
+       This class has been renamed from ``PythonTracebackLexer``.
+       ``PythonTracebackLexer`` now refers to the Python 3 variant.
+    """
+
+    name = 'Python 2.x Traceback'
+    aliases = ['py2tb']
+    filenames = ['*.py2tb']
+    mimetypes = ['text/x-python2-traceback']
+
+    tokens = {
+        'root': [
+            # Cover both (most recent call last) and (innermost last)
+            # The optional ^C allows us to catch keyboard interrupt signals.
+            (r'^(\^C)?(Traceback.*\n)',
+             bygroups(Text, Generic.Traceback), 'intb'),
+            # SyntaxError starts with this.
+            (r'^(?=  File "[^"]+", line \d+)', Generic.Traceback, 'intb'),
+            (r'^.*\n', Other),
+        ],
+        'intb': [
+            (r'^(  File )("[^"]+")(, line )(\d+)(, in )(.+)(\n)',
+             bygroups(Text, Name.Builtin, Text, Number, Text, Name, Text)),
+            (r'^(  File )("[^"]+")(, line )(\d+)(\n)',
+             bygroups(Text, Name.Builtin, Text, Number, Text)),
+            (r'^(    )(.+)(\n)',
+             bygroups(Text, using(Python2Lexer), Text), 'marker'),
+            (r'^([ \t]*)(\.\.\.)(\n)',
+             bygroups(Text, Comment, Text)),  # for doctests...
+            (r'^([^:]+)(: )(.+)(\n)',
+             bygroups(Generic.Error, Text, Name, Text), '#pop'),
+            (r'^([a-zA-Z_]\w*)(:?\n)',
+             bygroups(Generic.Error, Text), '#pop')
+        ],
+        'marker': [
+            # For syntax errors.
+            (r'( {4,})(\^)', bygroups(Text, Punctuation.Marker), '#pop'),
+            default('#pop'),
+        ],
+    }
+
+
+class CythonLexer(RegexLexer):
+    """
+    For Pyrex and Cython source code.
+
+    .. versionadded:: 1.1
+    """
+
+    name = 'Cython'
+    url = 'http://cython.org'
+    aliases = ['cython', 'pyx', 'pyrex']
+    filenames = ['*.pyx', '*.pxd', '*.pxi']
+    mimetypes = ['text/x-cython', 'application/x-cython']
+
+    tokens = {
+        'root': [
+            (r'\n', Text),
+            (r'^(\s*)("""(?:.|\n)*?""")', bygroups(Text, String.Doc)),
+            (r"^(\s*)('''(?:.|\n)*?''')", bygroups(Text, String.Doc)),
+            (r'[^\S\n]+', Text),
+            (r'#.*$', Comment),
+            (r'[]{}:(),;[]', Punctuation),
+            (r'\\\n', Text),
+            (r'\\', Text),
+            (r'(in|is|and|or|not)\b', Operator.Word),
+            (r'(<)([a-zA-Z0-9.?]+)(>)',
+             bygroups(Punctuation, Keyword.Type, Punctuation)),
+            (r'!=|==|<<|>>|[-~+/*%=<>&^|.?]', Operator),
+            (r'(from)(\d+)(<=)(\s+)(<)(\d+)(:)',
+             bygroups(Keyword, Number.Integer, Operator, Name, Operator,
+                      Name, Punctuation)),
+            include('keywords'),
+            (r'(def|property)(\s+)', bygroups(Keyword, Text), 'funcname'),
+            (r'(cp?def)(\s+)', bygroups(Keyword, Text), 'cdef'),
+            # (should actually start a block with only cdefs)
+            (r'(cdef)(:)', bygroups(Keyword, Punctuation)),
+            (r'(class|struct)(\s+)', bygroups(Keyword, Text), 'classname'),
+            (r'(from)(\s+)', bygroups(Keyword, Text), 'fromimport'),
+            (r'(c?import)(\s+)', bygroups(Keyword, Text), 'import'),
+            include('builtins'),
+            include('backtick'),
+            ('(?:[rR]|[uU][rR]|[rR][uU])"""', String, 'tdqs'),
+            ("(?:[rR]|[uU][rR]|[rR][uU])'''", String, 'tsqs'),
+            ('(?:[rR]|[uU][rR]|[rR][uU])"', String, 'dqs'),
+            ("(?:[rR]|[uU][rR]|[rR][uU])'", String, 'sqs'),
+            ('[uU]?"""', String, combined('stringescape', 'tdqs')),
+            ("[uU]?'''", String, combined('stringescape', 'tsqs')),
+            ('[uU]?"', String, combined('stringescape', 'dqs')),
+            ("[uU]?'", String, combined('stringescape', 'sqs')),
+            include('name'),
+            include('numbers'),
+        ],
+        'keywords': [
+            (words((
+                'assert', 'async', 'await', 'break', 'by', 'continue', 'ctypedef', 'del', 'elif',
+                'else', 'except', 'except?', 'exec', 'finally', 'for', 'fused', 'gil',
+                'global', 'if', 'include', 'lambda', 'nogil', 'pass', 'print',
+                'raise', 'return', 'try', 'while', 'yield', 'as', 'with'), suffix=r'\b'),
+             Keyword),
+            (r'(DEF|IF|ELIF|ELSE)\b', Comment.Preproc),
+        ],
+        'builtins': [
+            (words((
+                '__import__', 'abs', 'all', 'any', 'apply', 'basestring', 'bin', 'bint',
+                'bool', 'buffer', 'bytearray', 'bytes', 'callable', 'chr',
+                'classmethod', 'cmp', 'coerce', 'compile', 'complex', 'delattr',
+                'dict', 'dir', 'divmod', 'enumerate', 'eval', 'execfile', 'exit',
+                'file', 'filter', 'float', 'frozenset', 'getattr', 'globals',
+                'hasattr', 'hash', 'hex', 'id', 'input', 'int', 'intern', 'isinstance',
+                'issubclass', 'iter', 'len', 'list', 'locals', 'long', 'map', 'max',
+                'min', 'next', 'object', 'oct', 'open', 'ord', 'pow', 'property', 'Py_ssize_t',
+                'range', 'raw_input', 'reduce', 'reload', 'repr', 'reversed',
+                'round', 'set', 'setattr', 'slice', 'sorted', 'staticmethod',
+                'str', 'sum', 'super', 'tuple', 'type', 'unichr', 'unicode', 'unsigned',
+                'vars', 'xrange', 'zip'), prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Builtin),
+            (r'(?<!\.)(self|None|Ellipsis|NotImplemented|False|True|NULL'
+             r')\b', Name.Builtin.Pseudo),
+            (words((
+                'ArithmeticError', 'AssertionError', 'AttributeError',
+                'BaseException', 'DeprecationWarning', 'EOFError', 'EnvironmentError',
+                'Exception', 'FloatingPointError', 'FutureWarning', 'GeneratorExit',
+                'IOError', 'ImportError', 'ImportWarning', 'IndentationError',
+                'IndexError', 'KeyError', 'KeyboardInterrupt', 'LookupError',
+                'MemoryError', 'NameError', 'NotImplemented', 'NotImplementedError',
+                'OSError', 'OverflowError', 'OverflowWarning',
+                'PendingDeprecationWarning', 'ReferenceError', 'RuntimeError',
+                'RuntimeWarning', 'StandardError', 'StopIteration', 'SyntaxError',
+                'SyntaxWarning', 'SystemError', 'SystemExit', 'TabError',
+                'TypeError', 'UnboundLocalError', 'UnicodeDecodeError',
+                'UnicodeEncodeError', 'UnicodeError', 'UnicodeTranslateError',
+                'UnicodeWarning', 'UserWarning', 'ValueError', 'Warning',
+                'ZeroDivisionError'), prefix=r'(?<!\.)', suffix=r'\b'),
+             Name.Exception),
+        ],
+        'numbers': [
+            (r'(\d+\.?\d*|\d*\.\d+)([eE][+-]?[0-9]+)?', Number.Float),
+            (r'0\d+', Number.Oct),
+            (r'0[xX][a-fA-F0-9]+', Number.Hex),
+            (r'\d+L', Number.Integer.Long),
+            (r'\d+', Number.Integer)
+        ],
+        'backtick': [
+            ('`.*?`', String.Backtick),
+        ],
+        'name': [
+            (r'@\w+', Name.Decorator),
+            (r'[a-zA-Z_]\w*', Name),
+        ],
+        'funcname': [
+            (r'[a-zA-Z_]\w*', Name.Function, '#pop')
+        ],
+        'cdef': [
+            (r'(public|readonly|extern|api|inline)\b', Keyword.Reserved),
+            (r'(struct|enum|union|class)\b', Keyword),
+            (r'([a-zA-Z_]\w*)(\s*)(?=[(:#=]|$)',
+             bygroups(Name.Function, Text), '#pop'),
+            (r'([a-zA-Z_]\w*)(\s*)(,)',
+             bygroups(Name.Function, Text, Punctuation)),
+            (r'from\b', Keyword, '#pop'),
+            (r'as\b', Keyword),
+            (r':', Punctuation, '#pop'),
+            (r'(?=["\'])', Text, '#pop'),
+            (r'[a-zA-Z_]\w*', Keyword.Type),
+            (r'.', Text),
+        ],
+        'classname': [
+            (r'[a-zA-Z_]\w*', Name.Class, '#pop')
+        ],
+        'import': [
+            (r'(\s+)(as)(\s+)', bygroups(Text, Keyword, Text)),
+            (r'[a-zA-Z_][\w.]*', Name.Namespace),
+            (r'(\s*)(,)(\s*)', bygroups(Text, Operator, Text)),
+            default('#pop')  # all else: go back
+        ],
+        'fromimport': [
+            (r'(\s+)(c?import)\b', bygroups(Text, Keyword), '#pop'),
+            (r'[a-zA-Z_.][\w.]*', Name.Namespace),
+            # ``cdef foo from "header"``, or ``for foo from 0 < i < 10``
+            default('#pop'),
+        ],
+        'stringescape': [
+            (r'\\([\\abfnrtv"\']|\n|N\{.*?\}|u[a-fA-F0-9]{4}|'
+             r'U[a-fA-F0-9]{8}|x[a-fA-F0-9]{2}|[0-7]{1,3})', String.Escape)
+        ],
+        'strings': [
+            (r'%(\([a-zA-Z0-9]+\))?[-#0 +]*([0-9]+|[*])?(\.([0-9]+|[*]))?'
+             '[hlL]?[E-GXc-giorsux%]', String.Interpol),
+            (r'[^\\\'"%\n]+', String),
+            # quotes, percents and backslashes must be parsed one at a time
+            (r'[\'"\\]', String),
+            # unhandled string formatting sign
+            (r'%', String)
+            # newlines are an error (use "nl" state)
+        ],
+        'nl': [
+            (r'\n', String)
+        ],
+        'dqs': [
+            (r'"', String, '#pop'),
+            (r'\\\\|\\"|\\\n', String.Escape),  # included here again for raw strings
+            include('strings')
+        ],
+        'sqs': [
+            (r"'", String, '#pop'),
+            (r"\\\\|\\'|\\\n", String.Escape),  # included here again for raw strings
+            include('strings')
+        ],
+        'tdqs': [
+            (r'"""', String, '#pop'),
+            include('strings'),
+            include('nl')
+        ],
+        'tsqs': [
+            (r"'''", String, '#pop'),
+            include('strings'),
+            include('nl')
+        ],
+    }
+
+
+class DgLexer(RegexLexer):
+    """
+    Lexer for dg,
+    a functional and object-oriented programming language
+    running on the CPython 3 VM.
+
+    .. versionadded:: 1.6
+    """
+    name = 'dg'
+    aliases = ['dg']
+    filenames = ['*.dg']
+    mimetypes = ['text/x-dg']
+
+    tokens = {
+        'root': [
+            (r'\s+', Text),
+            (r'#.*?$', Comment.Single),
+
+            (r'(?i)0b[01]+', Number.Bin),
+            (r'(?i)0o[0-7]+', Number.Oct),
+            (r'(?i)0x[0-9a-f]+', Number.Hex),
+            (r'(?i)[+-]?[0-9]+\.[0-9]+(e[+-]?[0-9]+)?j?', Number.Float),
+            (r'(?i)[+-]?[0-9]+e[+-]?\d+j?', Number.Float),
+            (r'(?i)[+-]?[0-9]+j?', Number.Integer),
+
+            (r"(?i)(br|r?b?)'''", String, combined('stringescape', 'tsqs', 'string')),
+            (r'(?i)(br|r?b?)"""', String, combined('stringescape', 'tdqs', 'string')),
+            (r"(?i)(br|r?b?)'", String, combined('stringescape', 'sqs', 'string')),
+            (r'(?i)(br|r?b?)"', String, combined('stringescape', 'dqs', 'string')),
+
+            (r"`\w+'*`", Operator),
+            (r'\b(and|in|is|or|where)\b', Operator.Word),
+            (r'[!$%&*+\-./:<-@\\^|~;,]+', Operator),
+
+            (words((
+                'bool', 'bytearray', 'bytes', 'classmethod', 'complex', 'dict', 'dict\'',
+                'float', 'frozenset', 'int', 'list', 'list\'', 'memoryview', 'object',
+                'property', 'range', 'set', 'set\'', 'slice', 'staticmethod', 'str',
+                'super', 'tuple', 'tuple\'', 'type'),
+                   prefix=r'(?<!\.)', suffix=r'(?![\'\w])'),
+             Name.Builtin),
+            (words((
+                '__import__', 'abs', 'all', 'any', 'bin', 'bind', 'chr', 'cmp', 'compile',
+                'complex', 'delattr', 'dir', 'divmod', 'drop', 'dropwhile', 'enumerate',
+                'eval', 'exhaust', 'filter', 'flip', 'foldl1?', 'format', 'fst',
+                'getattr', 'globals', 'hasattr', 'hash', 'head', 'hex', 'id', 'init',
+                'input', 'isinstance', 'issubclass', 'iter', 'iterate', 'last', 'len',
+                'locals', 'map', 'max', 'min', 'next', 'oct', 'open', 'ord', 'pow',
+                'print', 'repr', 'reversed', 'round', 'setattr', 'scanl1?', 'snd',
+                'sorted', 'sum', 'tail', 'take', 'takewhile', 'vars', 'zip'),
+                   prefix=r'(?<!\.)', suffix=r'(?![\'\w])'),
+             Name.Builtin),
+            (r"(?<!\.)(self|Ellipsis|NotImplemented|None|True|False)(?!['\w])",
+             Name.Builtin.Pseudo),
+
+            (r"(?<!\.)[A-Z]\w*(Error|Exception|Warning)'*(?!['\w])",
+             Name.Exception),
+            (r"(?<!\.)(Exception|GeneratorExit|KeyboardInterrupt|StopIteration|"
+             r"SystemExit)(?!['\w])", Name.Exception),
+
+            (r"(?<![\w.])(except|finally|for|if|import|not|otherwise|raise|"
+             r"subclass|while|with|yield)(?!['\w])", Keyword.Reserved),
+
+            (r"[A-Z_]+'*(?!['\w])", Name),
+            (r"[A-Z]\w+'*(?!['\w])", Keyword.Type),
+            (r"\w+'*", Name),
+
+            (r'[()]', Punctuation),
+            (r'.', Error),
+        ],
+        'stringescape': [
+            (r'\\([\\abfnrtv"\']|\n|N\{.*?\}|u[a-fA-F0-9]{4}|'
+             r'U[a-fA-F0-9]{8}|x[a-fA-F0-9]{2}|[0-7]{1,3})', String.Escape)
+        ],
+        'string': [
+            (r'%(\(\w+\))?[-#0 +]*([0-9]+|[*])?(\.([0-9]+|[*]))?'
+             '[hlL]?[E-GXc-giorsux%]', String.Interpol),
+            (r'[^\\\'"%\n]+', String),
+            # quotes, percents and backslashes must be parsed one at a time
+            (r'[\'"\\]', String),
+            # unhandled string formatting sign
+            (r'%', String),
+            (r'\n', String)
+        ],
+        'dqs': [
+            (r'"', String, '#pop')
+        ],
+        'sqs': [
+            (r"'", String, '#pop')
+        ],
+        'tdqs': [
+            (r'"""', String, '#pop')
+        ],
+        'tsqs': [
+            (r"'''", String, '#pop')
+        ],
+    }
+
+
+class NumPyLexer(PythonLexer):
+    """
+    A Python lexer recognizing Numerical Python builtins.
+
+    .. versionadded:: 0.10
+    """
+
+    name = 'NumPy'
+    url = 'https://numpy.org/'
+    aliases = ['numpy']
+
+    # override the mimetypes to not inherit them from python
+    mimetypes = []
+    filenames = []
+
+    EXTRA_KEYWORDS = {
+        'abs', 'absolute', 'accumulate', 'add', 'alen', 'all', 'allclose',
+        'alltrue', 'alterdot', 'amax', 'amin', 'angle', 'any', 'append',
+        'apply_along_axis', 'apply_over_axes', 'arange', 'arccos', 'arccosh',
+        'arcsin', 'arcsinh', 'arctan', 'arctan2', 'arctanh', 'argmax', 'argmin',
+        'argsort', 'argwhere', 'around', 'array', 'array2string', 'array_equal',
+        'array_equiv', 'array_repr', 'array_split', 'array_str', 'arrayrange',
+        'asanyarray', 'asarray', 'asarray_chkfinite', 'ascontiguousarray',
+        'asfarray', 'asfortranarray', 'asmatrix', 'asscalar', 'astype',
+        'atleast_1d', 'atleast_2d', 'atleast_3d', 'average', 'bartlett',
+        'base_repr', 'beta', 'binary_repr', 'bincount', 'binomial',
+        'bitwise_and', 'bitwise_not', 'bitwise_or', 'bitwise_xor', 'blackman',
+        'bmat', 'broadcast', 'byte_bounds', 'bytes', 'byteswap', 'c_',
+        'can_cast', 'ceil', 'choose', 'clip', 'column_stack', 'common_type',
+        'compare_chararrays', 'compress', 'concatenate', 'conj', 'conjugate',
+        'convolve', 'copy', 'corrcoef', 'correlate', 'cos', 'cosh', 'cov',
+        'cross', 'cumprod', 'cumproduct', 'cumsum', 'delete', 'deprecate',
+        'diag', 'diagflat', 'diagonal', 'diff', 'digitize', 'disp', 'divide',
+        'dot', 'dsplit', 'dstack', 'dtype', 'dump', 'dumps', 'ediff1d', 'empty',
+        'empty_like', 'equal', 'exp', 'expand_dims', 'expm1', 'extract', 'eye',
+        'fabs', 'fastCopyAndTranspose', 'fft', 'fftfreq', 'fftshift', 'fill',
+        'finfo', 'fix', 'flat', 'flatnonzero', 'flatten', 'fliplr', 'flipud',
+        'floor', 'floor_divide', 'fmod', 'frexp', 'fromarrays', 'frombuffer',
+        'fromfile', 'fromfunction', 'fromiter', 'frompyfunc', 'fromstring',
+        'generic', 'get_array_wrap', 'get_include', 'get_numarray_include',
+        'get_numpy_include', 'get_printoptions', 'getbuffer', 'getbufsize',
+        'geterr', 'geterrcall', 'geterrobj', 'getfield', 'gradient', 'greater',
+        'greater_equal', 'gumbel', 'hamming', 'hanning', 'histogram',
+        'histogram2d', 'histogramdd', 'hsplit', 'hstack', 'hypot', 'i0',
+        'identity', 'ifft', 'imag', 'index_exp', 'indices', 'inf', 'info',
+        'inner', 'insert', 'int_asbuffer', 'interp', 'intersect1d',
+        'intersect1d_nu', 'inv', 'invert', 'iscomplex', 'iscomplexobj',
+        'isfinite', 'isfortran', 'isinf', 'isnan', 'isneginf', 'isposinf',
+        'isreal', 'isrealobj', 'isscalar', 'issctype', 'issubclass_',
+        'issubdtype', 'issubsctype', 'item', 'itemset', 'iterable', 'ix_',
+        'kaiser', 'kron', 'ldexp', 'left_shift', 'less', 'less_equal', 'lexsort',
+        'linspace', 'load', 'loads', 'loadtxt', 'log', 'log10', 'log1p', 'log2',
+        'logical_and', 'logical_not', 'logical_or', 'logical_xor', 'logspace',
+        'lstsq', 'mat', 'matrix', 'max', 'maximum', 'maximum_sctype',
+        'may_share_memory', 'mean', 'median', 'meshgrid', 'mgrid', 'min',
+        'minimum', 'mintypecode', 'mod', 'modf', 'msort', 'multiply', 'nan',
+        'nan_to_num', 'nanargmax', 'nanargmin', 'nanmax', 'nanmin', 'nansum',
+        'ndenumerate', 'ndim', 'ndindex', 'negative', 'newaxis', 'newbuffer',
+        'newbyteorder', 'nonzero', 'not_equal', 'obj2sctype', 'ogrid', 'ones',
+        'ones_like', 'outer', 'permutation', 'piecewise', 'pinv', 'pkgload',
+        'place', 'poisson', 'poly', 'poly1d', 'polyadd', 'polyder', 'polydiv',
+        'polyfit', 'polyint', 'polymul', 'polysub', 'polyval', 'power', 'prod',
+        'product', 'ptp', 'put', 'putmask', 'r_', 'randint', 'random_integers',
+        'random_sample', 'ranf', 'rank', 'ravel', 'real', 'real_if_close',
+        'recarray', 'reciprocal', 'reduce', 'remainder', 'repeat', 'require',
+        'reshape', 'resize', 'restoredot', 'right_shift', 'rint', 'roll',
+        'rollaxis', 'roots', 'rot90', 'round', 'round_', 'row_stack', 's_',
+        'sample', 'savetxt', 'sctype2char', 'searchsorted', 'seed', 'select',
+        'set_numeric_ops', 'set_printoptions', 'set_string_function',
+        'setbufsize', 'setdiff1d', 'seterr', 'seterrcall', 'seterrobj',
+        'setfield', 'setflags', 'setmember1d', 'setxor1d', 'shape',
+        'show_config', 'shuffle', 'sign', 'signbit', 'sin', 'sinc', 'sinh',
+        'size', 'slice', 'solve', 'sometrue', 'sort', 'sort_complex', 'source',
+        'split', 'sqrt', 'square', 'squeeze', 'standard_normal', 'std',
+        'subtract', 'sum', 'svd', 'swapaxes', 'take', 'tan', 'tanh', 'tensordot',
+        'test', 'tile', 'tofile', 'tolist', 'tostring', 'trace', 'transpose',
+        'trapz', 'tri', 'tril', 'trim_zeros', 'triu', 'true_divide', 'typeDict',
+        'typename', 'uniform', 'union1d', 'unique', 'unique1d', 'unravel_index',
+        'unwrap', 'vander', 'var', 'vdot', 'vectorize', 'view', 'vonmises',
+        'vsplit', 'vstack', 'weibull', 'where', 'who', 'zeros', 'zeros_like'
+    }
+
+    def get_tokens_unprocessed(self, text):
+        for index, token, value in \
+                PythonLexer.get_tokens_unprocessed(self, text):
+            if token is Name and value in self.EXTRA_KEYWORDS:
+                yield index, Keyword.Pseudo, value
+            else:
+                yield index, token, value
+
+    def analyse_text(text):
+        ltext = text[:1000]
+        return (shebang_matches(text, r'pythonw?(3(\.\d)?)?') or
+                'import ' in ltext) \
+            and ('import numpy' in ltext or 'from numpy import' in ltext)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/modeline.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/modeline.py
new file mode 100644
index 0000000..4363083
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/modeline.py
@@ -0,0 +1,43 @@
+"""
+    pygments.modeline
+    ~~~~~~~~~~~~~~~~~
+
+    A simple modeline parser (based on pymodeline).
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+
+__all__ = ['get_filetype_from_buffer']
+
+
+modeline_re = re.compile(r'''
+    (?: vi | vim | ex ) (?: [<=>]? \d* )? :
+    .* (?: ft | filetype | syn | syntax ) = ( [^:\s]+ )
+''', re.VERBOSE)
+
+
+def get_filetype_from_line(l):
+    m = modeline_re.search(l)
+    if m:
+        return m.group(1)
+
+
+def get_filetype_from_buffer(buf, max_lines=5):
+    """
+    Scan the buffer for modelines and return filetype if one is found.
+    """
+    lines = buf.splitlines()
+    for l in lines[-1:-max_lines-1:-1]:
+        ret = get_filetype_from_line(l)
+        if ret:
+            return ret
+    for i in range(max_lines, -1, -1):
+        if i < len(lines):
+            ret = get_filetype_from_line(lines[i])
+            if ret:
+                return ret
+
+    return None
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/plugin.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/plugin.py
new file mode 100644
index 0000000..3590bee
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/plugin.py
@@ -0,0 +1,88 @@
+"""
+    pygments.plugin
+    ~~~~~~~~~~~~~~~
+
+    Pygments plugin interface. By default, this tries to use
+    ``importlib.metadata``, which is in the Python standard
+    library since Python 3.8, or its ``importlib_metadata``
+    backport for earlier versions of Python. It falls back on
+    ``pkg_resources`` if not found. Finally, if ``pkg_resources``
+    is not found either, no plugins are loaded at all.
+
+    lexer plugins::
+
+        [pygments.lexers]
+        yourlexer = yourmodule:YourLexer
+
+    formatter plugins::
+
+        [pygments.formatters]
+        yourformatter = yourformatter:YourFormatter
+        /.ext = yourformatter:YourFormatter
+
+    As you can see, you can define extensions for the formatter
+    with a leading slash.
+
+    syntax plugins::
+
+        [pygments.styles]
+        yourstyle = yourstyle:YourStyle
+
+    filter plugin::
+
+        [pygments.filter]
+        yourfilter = yourfilter:YourFilter
+
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+LEXER_ENTRY_POINT = 'pygments.lexers'
+FORMATTER_ENTRY_POINT = 'pygments.formatters'
+STYLE_ENTRY_POINT = 'pygments.styles'
+FILTER_ENTRY_POINT = 'pygments.filters'
+
+
+def iter_entry_points(group_name):
+    try:
+        from importlib.metadata import entry_points
+    except ImportError:
+        try:
+            from importlib_metadata import entry_points
+        except ImportError:
+            try:
+                from pip._vendor.pkg_resources import iter_entry_points
+            except (ImportError, OSError):
+                return []
+            else:
+                return iter_entry_points(group_name)
+    groups = entry_points()
+    if hasattr(groups, 'select'):
+        # New interface in Python 3.10 and newer versions of the
+        # importlib_metadata backport.
+        return groups.select(group=group_name)
+    else:
+        # Older interface, deprecated in Python 3.10 and recent
+        # importlib_metadata, but we need it in Python 3.8 and 3.9.
+        return groups.get(group_name, [])
+
+
+def find_plugin_lexers():
+    for entrypoint in iter_entry_points(LEXER_ENTRY_POINT):
+        yield entrypoint.load()
+
+
+def find_plugin_formatters():
+    for entrypoint in iter_entry_points(FORMATTER_ENTRY_POINT):
+        yield entrypoint.name, entrypoint.load()
+
+
+def find_plugin_styles():
+    for entrypoint in iter_entry_points(STYLE_ENTRY_POINT):
+        yield entrypoint.name, entrypoint.load()
+
+
+def find_plugin_filters():
+    for entrypoint in iter_entry_points(FILTER_ENTRY_POINT):
+        yield entrypoint.name, entrypoint.load()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/regexopt.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/regexopt.py
new file mode 100644
index 0000000..ae00791
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/regexopt.py
@@ -0,0 +1,91 @@
+"""
+    pygments.regexopt
+    ~~~~~~~~~~~~~~~~~
+
+    An algorithm that generates optimized regexes for matching long lists of
+    literal strings.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+from re import escape
+from os.path import commonprefix
+from itertools import groupby
+from operator import itemgetter
+
+CS_ESCAPE = re.compile(r'[\[\^\\\-\]]')
+FIRST_ELEMENT = itemgetter(0)
+
+
+def make_charset(letters):
+    return '[' + CS_ESCAPE.sub(lambda m: '\\' + m.group(), ''.join(letters)) + ']'
+
+
+def regex_opt_inner(strings, open_paren):
+    """Return a regex that matches any string in the sorted list of strings."""
+    close_paren = open_paren and ')' or ''
+    # print strings, repr(open_paren)
+    if not strings:
+        # print '-> nothing left'
+        return ''
+    first = strings[0]
+    if len(strings) == 1:
+        # print '-> only 1 string'
+        return open_paren + escape(first) + close_paren
+    if not first:
+        # print '-> first string empty'
+        return open_paren + regex_opt_inner(strings[1:], '(?:') \
+            + '?' + close_paren
+    if len(first) == 1:
+        # multiple one-char strings? make a charset
+        oneletter = []
+        rest = []
+        for s in strings:
+            if len(s) == 1:
+                oneletter.append(s)
+            else:
+                rest.append(s)
+        if len(oneletter) > 1:  # do we have more than one oneletter string?
+            if rest:
+                # print '-> 1-character + rest'
+                return open_paren + regex_opt_inner(rest, '') + '|' \
+                    + make_charset(oneletter) + close_paren
+            # print '-> only 1-character'
+            return open_paren + make_charset(oneletter) + close_paren
+    prefix = commonprefix(strings)
+    if prefix:
+        plen = len(prefix)
+        # we have a prefix for all strings
+        # print '-> prefix:', prefix
+        return open_paren + escape(prefix) \
+            + regex_opt_inner([s[plen:] for s in strings], '(?:') \
+            + close_paren
+    # is there a suffix?
+    strings_rev = [s[::-1] for s in strings]
+    suffix = commonprefix(strings_rev)
+    if suffix:
+        slen = len(suffix)
+        # print '-> suffix:', suffix[::-1]
+        return open_paren \
+            + regex_opt_inner(sorted(s[:-slen] for s in strings), '(?:') \
+            + escape(suffix[::-1]) + close_paren
+    # recurse on common 1-string prefixes
+    # print '-> last resort'
+    return open_paren + \
+        '|'.join(regex_opt_inner(list(group[1]), '')
+                 for group in groupby(strings, lambda s: s[0] == first[0])) \
+        + close_paren
+
+
+def regex_opt(strings, prefix='', suffix=''):
+    """Return a compiled regex that matches any string in the given list.
+
+    The strings to match must be literal strings, not regexes.  They will be
+    regex-escaped.
+
+    *prefix* and *suffix* are pre- and appended to the final regex.
+    """
+    strings = sorted(strings)
+    return prefix + regex_opt_inner(strings, '(') + suffix
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/scanner.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/scanner.py
new file mode 100644
index 0000000..d47ed48
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/scanner.py
@@ -0,0 +1,104 @@
+"""
+    pygments.scanner
+    ~~~~~~~~~~~~~~~~
+
+    This library implements a regex based scanner. Some languages
+    like Pascal are easy to parse but have some keywords that
+    depend on the context. Because of this it's impossible to lex
+    that just by using a regular expression lexer like the
+    `RegexLexer`.
+
+    Have a look at the `DelphiLexer` to get an idea of how to use
+    this scanner.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+import re
+
+
+class EndOfText(RuntimeError):
+    """
+    Raise if end of text is reached and the user
+    tried to call a match function.
+    """
+
+
+class Scanner:
+    """
+    Simple scanner
+
+    All method patterns are regular expression strings (not
+    compiled expressions!)
+    """
+
+    def __init__(self, text, flags=0):
+        """
+        :param text:    The text which should be scanned
+        :param flags:   default regular expression flags
+        """
+        self.data = text
+        self.data_length = len(text)
+        self.start_pos = 0
+        self.pos = 0
+        self.flags = flags
+        self.last = None
+        self.match = None
+        self._re_cache = {}
+
+    def eos(self):
+        """`True` if the scanner reached the end of text."""
+        return self.pos >= self.data_length
+    eos = property(eos, eos.__doc__)
+
+    def check(self, pattern):
+        """
+        Apply `pattern` on the current position and return
+        the match object. (Doesn't touch pos). Use this for
+        lookahead.
+        """
+        if self.eos:
+            raise EndOfText()
+        if pattern not in self._re_cache:
+            self._re_cache[pattern] = re.compile(pattern, self.flags)
+        return self._re_cache[pattern].match(self.data, self.pos)
+
+    def test(self, pattern):
+        """Apply a pattern on the current position and check
+        if it patches. Doesn't touch pos.
+        """
+        return self.check(pattern) is not None
+
+    def scan(self, pattern):
+        """
+        Scan the text for the given pattern and update pos/match
+        and related fields. The return value is a boolean that
+        indicates if the pattern matched. The matched value is
+        stored on the instance as ``match``, the last value is
+        stored as ``last``. ``start_pos`` is the position of the
+        pointer before the pattern was matched, ``pos`` is the
+        end position.
+        """
+        if self.eos:
+            raise EndOfText()
+        if pattern not in self._re_cache:
+            self._re_cache[pattern] = re.compile(pattern, self.flags)
+        self.last = self.match
+        m = self._re_cache[pattern].match(self.data, self.pos)
+        if m is None:
+            return False
+        self.start_pos = m.start()
+        self.pos = m.end()
+        self.match = m.group()
+        return True
+
+    def get_char(self):
+        """Scan exactly one char."""
+        self.scan('.')
+
+    def __repr__(self):
+        return '<%s %d/%d>' % (
+            self.__class__.__name__,
+            self.pos,
+            self.data_length
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/sphinxext.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/sphinxext.py
new file mode 100644
index 0000000..c41bd49
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/sphinxext.py
@@ -0,0 +1,155 @@
+"""
+    pygments.sphinxext
+    ~~~~~~~~~~~~~~~~~~
+
+    Sphinx extension to generate automatic documentation of lexers,
+    formatters and filters.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import sys
+
+from docutils import nodes
+from docutils.statemachine import ViewList
+from docutils.parsers.rst import Directive
+from sphinx.util.nodes import nested_parse_with_titles
+
+
+MODULEDOC = '''
+.. module:: %s
+
+%s
+%s
+'''
+
+LEXERDOC = '''
+.. class:: %s
+
+    :Short names: %s
+    :Filenames:   %s
+    :MIME types:  %s
+
+    %s
+
+'''
+
+FMTERDOC = '''
+.. class:: %s
+
+    :Short names: %s
+    :Filenames: %s
+
+    %s
+
+'''
+
+FILTERDOC = '''
+.. class:: %s
+
+    :Name: %s
+
+    %s
+
+'''
+
+
+class PygmentsDoc(Directive):
+    """
+    A directive to collect all lexers/formatters/filters and generate
+    autoclass directives for them.
+    """
+    has_content = False
+    required_arguments = 1
+    optional_arguments = 0
+    final_argument_whitespace = False
+    option_spec = {}
+
+    def run(self):
+        self.filenames = set()
+        if self.arguments[0] == 'lexers':
+            out = self.document_lexers()
+        elif self.arguments[0] == 'formatters':
+            out = self.document_formatters()
+        elif self.arguments[0] == 'filters':
+            out = self.document_filters()
+        else:
+            raise Exception('invalid argument for "pygmentsdoc" directive')
+        node = nodes.compound()
+        vl = ViewList(out.split('\n'), source='')
+        nested_parse_with_titles(self.state, vl, node)
+        for fn in self.filenames:
+            self.state.document.settings.record_dependencies.add(fn)
+        return node.children
+
+    def document_lexers(self):
+        from pip._vendor.pygments.lexers._mapping import LEXERS
+        out = []
+        modules = {}
+        moduledocstrings = {}
+        for classname, data in sorted(LEXERS.items(), key=lambda x: x[0]):
+            module = data[0]
+            mod = __import__(module, None, None, [classname])
+            self.filenames.add(mod.__file__)
+            cls = getattr(mod, classname)
+            if not cls.__doc__:
+                print("Warning: %s does not have a docstring." % classname)
+            docstring = cls.__doc__
+            if isinstance(docstring, bytes):
+                docstring = docstring.decode('utf8')
+            modules.setdefault(module, []).append((
+                classname,
+                ', '.join(data[2]) or 'None',
+                ', '.join(data[3]).replace('*', '\\*').replace('_', '\\') or 'None',
+                ', '.join(data[4]) or 'None',
+                docstring))
+            if module not in moduledocstrings:
+                moddoc = mod.__doc__
+                if isinstance(moddoc, bytes):
+                    moddoc = moddoc.decode('utf8')
+                moduledocstrings[module] = moddoc
+
+        for module, lexers in sorted(modules.items(), key=lambda x: x[0]):
+            if moduledocstrings[module] is None:
+                raise Exception("Missing docstring for %s" % (module,))
+            heading = moduledocstrings[module].splitlines()[4].strip().rstrip('.')
+            out.append(MODULEDOC % (module, heading, '-'*len(heading)))
+            for data in lexers:
+                out.append(LEXERDOC % data)
+
+        return ''.join(out)
+
+    def document_formatters(self):
+        from pip._vendor.pygments.formatters import FORMATTERS
+
+        out = []
+        for classname, data in sorted(FORMATTERS.items(), key=lambda x: x[0]):
+            module = data[0]
+            mod = __import__(module, None, None, [classname])
+            self.filenames.add(mod.__file__)
+            cls = getattr(mod, classname)
+            docstring = cls.__doc__
+            if isinstance(docstring, bytes):
+                docstring = docstring.decode('utf8')
+            heading = cls.__name__
+            out.append(FMTERDOC % (heading, ', '.join(data[2]) or 'None',
+                                   ', '.join(data[3]).replace('*', '\\*') or 'None',
+                                   docstring))
+        return ''.join(out)
+
+    def document_filters(self):
+        from pip._vendor.pygments.filters import FILTERS
+
+        out = []
+        for name, cls in FILTERS.items():
+            self.filenames.add(sys.modules[cls.__module__].__file__)
+            docstring = cls.__doc__
+            if isinstance(docstring, bytes):
+                docstring = docstring.decode('utf8')
+            out.append(FILTERDOC % (cls.__name__, name, docstring))
+        return ''.join(out)
+
+
+def setup(app):
+    app.add_directive('pygmentsdoc', PygmentsDoc)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/style.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/style.py
new file mode 100644
index 0000000..84abbc2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/style.py
@@ -0,0 +1,197 @@
+"""
+    pygments.style
+    ~~~~~~~~~~~~~~
+
+    Basic style object.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.token import Token, STANDARD_TYPES
+
+# Default mapping of ansixxx to RGB colors.
+_ansimap = {
+    # dark
+    'ansiblack': '000000',
+    'ansired': '7f0000',
+    'ansigreen': '007f00',
+    'ansiyellow': '7f7fe0',
+    'ansiblue': '00007f',
+    'ansimagenta': '7f007f',
+    'ansicyan': '007f7f',
+    'ansigray': 'e5e5e5',
+    # normal
+    'ansibrightblack': '555555',
+    'ansibrightred': 'ff0000',
+    'ansibrightgreen': '00ff00',
+    'ansibrightyellow': 'ffff00',
+    'ansibrightblue': '0000ff',
+    'ansibrightmagenta': 'ff00ff',
+    'ansibrightcyan': '00ffff',
+    'ansiwhite': 'ffffff',
+}
+# mapping of deprecated #ansixxx colors to new color names
+_deprecated_ansicolors = {
+    # dark
+    '#ansiblack': 'ansiblack',
+    '#ansidarkred': 'ansired',
+    '#ansidarkgreen': 'ansigreen',
+    '#ansibrown': 'ansiyellow',
+    '#ansidarkblue': 'ansiblue',
+    '#ansipurple': 'ansimagenta',
+    '#ansiteal': 'ansicyan',
+    '#ansilightgray': 'ansigray',
+    # normal
+    '#ansidarkgray': 'ansibrightblack',
+    '#ansired': 'ansibrightred',
+    '#ansigreen': 'ansibrightgreen',
+    '#ansiyellow': 'ansibrightyellow',
+    '#ansiblue': 'ansibrightblue',
+    '#ansifuchsia': 'ansibrightmagenta',
+    '#ansiturquoise': 'ansibrightcyan',
+    '#ansiwhite': 'ansiwhite',
+}
+ansicolors = set(_ansimap)
+
+
+class StyleMeta(type):
+
+    def __new__(mcs, name, bases, dct):
+        obj = type.__new__(mcs, name, bases, dct)
+        for token in STANDARD_TYPES:
+            if token not in obj.styles:
+                obj.styles[token] = ''
+
+        def colorformat(text):
+            if text in ansicolors:
+                return text
+            if text[0:1] == '#':
+                col = text[1:]
+                if len(col) == 6:
+                    return col
+                elif len(col) == 3:
+                    return col[0] * 2 + col[1] * 2 + col[2] * 2
+            elif text == '':
+                return ''
+            elif text.startswith('var') or text.startswith('calc'):
+                return text
+            assert False, "wrong color format %r" % text
+
+        _styles = obj._styles = {}
+
+        for ttype in obj.styles:
+            for token in ttype.split():
+                if token in _styles:
+                    continue
+                ndef = _styles.get(token.parent, None)
+                styledefs = obj.styles.get(token, '').split()
+                if not ndef or token is None:
+                    ndef = ['', 0, 0, 0, '', '', 0, 0, 0]
+                elif 'noinherit' in styledefs and token is not Token:
+                    ndef = _styles[Token][:]
+                else:
+                    ndef = ndef[:]
+                _styles[token] = ndef
+                for styledef in obj.styles.get(token, '').split():
+                    if styledef == 'noinherit':
+                        pass
+                    elif styledef == 'bold':
+                        ndef[1] = 1
+                    elif styledef == 'nobold':
+                        ndef[1] = 0
+                    elif styledef == 'italic':
+                        ndef[2] = 1
+                    elif styledef == 'noitalic':
+                        ndef[2] = 0
+                    elif styledef == 'underline':
+                        ndef[3] = 1
+                    elif styledef == 'nounderline':
+                        ndef[3] = 0
+                    elif styledef[:3] == 'bg:':
+                        ndef[4] = colorformat(styledef[3:])
+                    elif styledef[:7] == 'border:':
+                        ndef[5] = colorformat(styledef[7:])
+                    elif styledef == 'roman':
+                        ndef[6] = 1
+                    elif styledef == 'sans':
+                        ndef[7] = 1
+                    elif styledef == 'mono':
+                        ndef[8] = 1
+                    else:
+                        ndef[0] = colorformat(styledef)
+
+        return obj
+
+    def style_for_token(cls, token):
+        t = cls._styles[token]
+        ansicolor = bgansicolor = None
+        color = t[0]
+        if color in _deprecated_ansicolors:
+            color = _deprecated_ansicolors[color]
+        if color in ansicolors:
+            ansicolor = color
+            color = _ansimap[color]
+        bgcolor = t[4]
+        if bgcolor in _deprecated_ansicolors:
+            bgcolor = _deprecated_ansicolors[bgcolor]
+        if bgcolor in ansicolors:
+            bgansicolor = bgcolor
+            bgcolor = _ansimap[bgcolor]
+
+        return {
+            'color':        color or None,
+            'bold':         bool(t[1]),
+            'italic':       bool(t[2]),
+            'underline':    bool(t[3]),
+            'bgcolor':      bgcolor or None,
+            'border':       t[5] or None,
+            'roman':        bool(t[6]) or None,
+            'sans':         bool(t[7]) or None,
+            'mono':         bool(t[8]) or None,
+            'ansicolor':    ansicolor,
+            'bgansicolor':  bgansicolor,
+        }
+
+    def list_styles(cls):
+        return list(cls)
+
+    def styles_token(cls, ttype):
+        return ttype in cls._styles
+
+    def __iter__(cls):
+        for token in cls._styles:
+            yield token, cls.style_for_token(token)
+
+    def __len__(cls):
+        return len(cls._styles)
+
+
+class Style(metaclass=StyleMeta):
+
+    #: overall background color (``None`` means transparent)
+    background_color = '#ffffff'
+
+    #: highlight background color
+    highlight_color = '#ffffcc'
+
+    #: line number font color
+    line_number_color = 'inherit'
+
+    #: line number background color
+    line_number_background_color = 'transparent'
+
+    #: special line number font color
+    line_number_special_color = '#000000'
+
+    #: special line number background color
+    line_number_special_background_color = '#ffffc0'
+
+    #: Style definitions for individual token types.
+    styles = {}
+
+    # Attribute for lexers defined within Pygments. If set
+    # to True, the style is not shown in the style gallery
+    # on the website. This is intended for language-specific
+    # styles.
+    web_style_gallery_exclude = False
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__init__.py
new file mode 100644
index 0000000..44cc0ef
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__init__.py
@@ -0,0 +1,97 @@
+"""
+    pygments.styles
+    ~~~~~~~~~~~~~~~
+
+    Contains built-in styles.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from pip._vendor.pygments.plugin import find_plugin_styles
+from pip._vendor.pygments.util import ClassNotFound
+
+
+#: Maps style names to 'submodule::classname'.
+STYLE_MAP = {
+    'default':  'default::DefaultStyle',
+    'emacs':    'emacs::EmacsStyle',
+    'friendly': 'friendly::FriendlyStyle',
+    'friendly_grayscale': 'friendly_grayscale::FriendlyGrayscaleStyle',
+    'colorful': 'colorful::ColorfulStyle',
+    'autumn':   'autumn::AutumnStyle',
+    'murphy':   'murphy::MurphyStyle',
+    'manni':    'manni::ManniStyle',
+    'material': 'material::MaterialStyle',
+    'monokai':  'monokai::MonokaiStyle',
+    'perldoc':  'perldoc::PerldocStyle',
+    'pastie':   'pastie::PastieStyle',
+    'borland':  'borland::BorlandStyle',
+    'trac':     'trac::TracStyle',
+    'native':   'native::NativeStyle',
+    'fruity':   'fruity::FruityStyle',
+    'bw':       'bw::BlackWhiteStyle',
+    'vim':      'vim::VimStyle',
+    'vs':       'vs::VisualStudioStyle',
+    'tango':    'tango::TangoStyle',
+    'rrt':      'rrt::RrtStyle',
+    'xcode':    'xcode::XcodeStyle',
+    'igor':     'igor::IgorStyle',
+    'paraiso-light': 'paraiso_light::ParaisoLightStyle',
+    'paraiso-dark': 'paraiso_dark::ParaisoDarkStyle',
+    'lovelace': 'lovelace::LovelaceStyle',
+    'algol':    'algol::AlgolStyle',
+    'algol_nu': 'algol_nu::Algol_NuStyle',
+    'arduino':  'arduino::ArduinoStyle',
+    'rainbow_dash': 'rainbow_dash::RainbowDashStyle',
+    'abap':     'abap::AbapStyle',
+    'solarized-dark': 'solarized::SolarizedDarkStyle',
+    'solarized-light': 'solarized::SolarizedLightStyle',
+    'sas':         'sas::SasStyle',
+    'staroffice' : 'staroffice::StarofficeStyle',
+    'stata':       'stata_light::StataLightStyle',
+    'stata-light': 'stata_light::StataLightStyle',
+    'stata-dark':  'stata_dark::StataDarkStyle',
+    'inkpot':      'inkpot::InkPotStyle',
+    'zenburn': 'zenburn::ZenburnStyle',
+    'gruvbox-dark': 'gruvbox::GruvboxDarkStyle',
+    'gruvbox-light': 'gruvbox::GruvboxLightStyle',
+    'dracula': 'dracula::DraculaStyle',
+    'one-dark': 'onedark::OneDarkStyle',
+    'lilypond' : 'lilypond::LilyPondStyle',
+    'nord': 'nord::NordStyle',
+    'nord-darker': 'nord::NordDarkerStyle',
+    'github-dark': 'gh_dark::GhDarkStyle'
+}
+
+
+def get_style_by_name(name):
+    if name in STYLE_MAP:
+        mod, cls = STYLE_MAP[name].split('::')
+        builtin = "yes"
+    else:
+        for found_name, style in find_plugin_styles():
+            if name == found_name:
+                return style
+        # perhaps it got dropped into our styles package
+        builtin = ""
+        mod = name
+        cls = name.title() + "Style"
+
+    try:
+        mod = __import__('pygments.styles.' + mod, None, None, [cls])
+    except ImportError:
+        raise ClassNotFound("Could not find style module %r" % mod +
+                         (builtin and ", though it should be builtin") + ".")
+    try:
+        return getattr(mod, cls)
+    except AttributeError:
+        raise ClassNotFound("Could not find style class %r in style module." % cls)
+
+
+def get_all_styles():
+    """Return a generator for all styles by name,
+    both builtin and plugin."""
+    yield from STYLE_MAP
+    for name, _ in find_plugin_styles():
+        yield name
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..e2d3e58
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/styles/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/token.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/token.py
new file mode 100644
index 0000000..e3e565a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/token.py
@@ -0,0 +1,213 @@
+"""
+    pygments.token
+    ~~~~~~~~~~~~~~
+
+    Basic token types and the standard tokens.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+
+class _TokenType(tuple):
+    parent = None
+
+    def split(self):
+        buf = []
+        node = self
+        while node is not None:
+            buf.append(node)
+            node = node.parent
+        buf.reverse()
+        return buf
+
+    def __init__(self, *args):
+        # no need to call super.__init__
+        self.subtypes = set()
+
+    def __contains__(self, val):
+        return self is val or (
+            type(val) is self.__class__ and
+            val[:len(self)] == self
+        )
+
+    def __getattr__(self, val):
+        if not val or not val[0].isupper():
+            return tuple.__getattribute__(self, val)
+        new = _TokenType(self + (val,))
+        setattr(self, val, new)
+        self.subtypes.add(new)
+        new.parent = self
+        return new
+
+    def __repr__(self):
+        return 'Token' + (self and '.' or '') + '.'.join(self)
+
+    def __copy__(self):
+        # These instances are supposed to be singletons
+        return self
+
+    def __deepcopy__(self, memo):
+        # These instances are supposed to be singletons
+        return self
+
+
+Token = _TokenType()
+
+# Special token types
+Text = Token.Text
+Whitespace = Text.Whitespace
+Escape = Token.Escape
+Error = Token.Error
+# Text that doesn't belong to this lexer (e.g. HTML in PHP)
+Other = Token.Other
+
+# Common token types for source code
+Keyword = Token.Keyword
+Name = Token.Name
+Literal = Token.Literal
+String = Literal.String
+Number = Literal.Number
+Punctuation = Token.Punctuation
+Operator = Token.Operator
+Comment = Token.Comment
+
+# Generic types for non-source code
+Generic = Token.Generic
+
+# String and some others are not direct children of Token.
+# alias them:
+Token.Token = Token
+Token.String = String
+Token.Number = Number
+
+
+def is_token_subtype(ttype, other):
+    """
+    Return True if ``ttype`` is a subtype of ``other``.
+
+    exists for backwards compatibility. use ``ttype in other`` now.
+    """
+    return ttype in other
+
+
+def string_to_tokentype(s):
+    """
+    Convert a string into a token type::
+
+        >>> string_to_token('String.Double')
+        Token.Literal.String.Double
+        >>> string_to_token('Token.Literal.Number')
+        Token.Literal.Number
+        >>> string_to_token('')
+        Token
+
+    Tokens that are already tokens are returned unchanged:
+
+        >>> string_to_token(String)
+        Token.Literal.String
+    """
+    if isinstance(s, _TokenType):
+        return s
+    if not s:
+        return Token
+    node = Token
+    for item in s.split('.'):
+        node = getattr(node, item)
+    return node
+
+
+# Map standard token types to short names, used in CSS class naming.
+# If you add a new item, please be sure to run this file to perform
+# a consistency check for duplicate values.
+STANDARD_TYPES = {
+    Token:                         '',
+
+    Text:                          '',
+    Whitespace:                    'w',
+    Escape:                        'esc',
+    Error:                         'err',
+    Other:                         'x',
+
+    Keyword:                       'k',
+    Keyword.Constant:              'kc',
+    Keyword.Declaration:           'kd',
+    Keyword.Namespace:             'kn',
+    Keyword.Pseudo:                'kp',
+    Keyword.Reserved:              'kr',
+    Keyword.Type:                  'kt',
+
+    Name:                          'n',
+    Name.Attribute:                'na',
+    Name.Builtin:                  'nb',
+    Name.Builtin.Pseudo:           'bp',
+    Name.Class:                    'nc',
+    Name.Constant:                 'no',
+    Name.Decorator:                'nd',
+    Name.Entity:                   'ni',
+    Name.Exception:                'ne',
+    Name.Function:                 'nf',
+    Name.Function.Magic:           'fm',
+    Name.Property:                 'py',
+    Name.Label:                    'nl',
+    Name.Namespace:                'nn',
+    Name.Other:                    'nx',
+    Name.Tag:                      'nt',
+    Name.Variable:                 'nv',
+    Name.Variable.Class:           'vc',
+    Name.Variable.Global:          'vg',
+    Name.Variable.Instance:        'vi',
+    Name.Variable.Magic:           'vm',
+
+    Literal:                       'l',
+    Literal.Date:                  'ld',
+
+    String:                        's',
+    String.Affix:                  'sa',
+    String.Backtick:               'sb',
+    String.Char:                   'sc',
+    String.Delimiter:              'dl',
+    String.Doc:                    'sd',
+    String.Double:                 's2',
+    String.Escape:                 'se',
+    String.Heredoc:                'sh',
+    String.Interpol:               'si',
+    String.Other:                  'sx',
+    String.Regex:                  'sr',
+    String.Single:                 's1',
+    String.Symbol:                 'ss',
+
+    Number:                        'm',
+    Number.Bin:                    'mb',
+    Number.Float:                  'mf',
+    Number.Hex:                    'mh',
+    Number.Integer:                'mi',
+    Number.Integer.Long:           'il',
+    Number.Oct:                    'mo',
+
+    Operator:                      'o',
+    Operator.Word:                 'ow',
+
+    Punctuation:                   'p',
+    Punctuation.Marker:            'pm',
+
+    Comment:                       'c',
+    Comment.Hashbang:              'ch',
+    Comment.Multiline:             'cm',
+    Comment.Preproc:               'cp',
+    Comment.PreprocFile:           'cpf',
+    Comment.Single:                'c1',
+    Comment.Special:               'cs',
+
+    Generic:                       'g',
+    Generic.Deleted:               'gd',
+    Generic.Emph:                  'ge',
+    Generic.Error:                 'gr',
+    Generic.Heading:               'gh',
+    Generic.Inserted:              'gi',
+    Generic.Output:                'go',
+    Generic.Prompt:                'gp',
+    Generic.Strong:                'gs',
+    Generic.Subheading:            'gu',
+    Generic.Traceback:             'gt',
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/unistring.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/unistring.py
new file mode 100644
index 0000000..2e3c808
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/unistring.py
@@ -0,0 +1,153 @@
+"""
+    pygments.unistring
+    ~~~~~~~~~~~~~~~~~~
+
+    Strings of all Unicode characters of a certain category.
+    Used for matching in Unicode-aware languages. Run to regenerate.
+
+    Inspired by chartypes_create.py from the MoinMoin project.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+Cc = '\x00-\x1f\x7f-\x9f'
+
+Cf = '\xad\u0600-\u0605\u061c\u06dd\u070f\u08e2\u180e\u200b-\u200f\u202a-\u202e\u2060-\u2064\u2066-\u206f\ufeff\ufff9-\ufffb\U000110bd\U000110cd\U0001bca0-\U0001bca3\U0001d173-\U0001d17a\U000e0001\U000e0020-\U000e007f'
+
+Cn = '\u0378-\u0379\u0380-\u0383\u038b\u038d\u03a2\u0530\u0557-\u0558\u058b-\u058c\u0590\u05c8-\u05cf\u05eb-\u05ee\u05f5-\u05ff\u061d\u070e\u074b-\u074c\u07b2-\u07bf\u07fb-\u07fc\u082e-\u082f\u083f\u085c-\u085d\u085f\u086b-\u089f\u08b5\u08be-\u08d2\u0984\u098d-\u098e\u0991-\u0992\u09a9\u09b1\u09b3-\u09b5\u09ba-\u09bb\u09c5-\u09c6\u09c9-\u09ca\u09cf-\u09d6\u09d8-\u09db\u09de\u09e4-\u09e5\u09ff-\u0a00\u0a04\u0a0b-\u0a0e\u0a11-\u0a12\u0a29\u0a31\u0a34\u0a37\u0a3a-\u0a3b\u0a3d\u0a43-\u0a46\u0a49-\u0a4a\u0a4e-\u0a50\u0a52-\u0a58\u0a5d\u0a5f-\u0a65\u0a77-\u0a80\u0a84\u0a8e\u0a92\u0aa9\u0ab1\u0ab4\u0aba-\u0abb\u0ac6\u0aca\u0ace-\u0acf\u0ad1-\u0adf\u0ae4-\u0ae5\u0af2-\u0af8\u0b00\u0b04\u0b0d-\u0b0e\u0b11-\u0b12\u0b29\u0b31\u0b34\u0b3a-\u0b3b\u0b45-\u0b46\u0b49-\u0b4a\u0b4e-\u0b55\u0b58-\u0b5b\u0b5e\u0b64-\u0b65\u0b78-\u0b81\u0b84\u0b8b-\u0b8d\u0b91\u0b96-\u0b98\u0b9b\u0b9d\u0ba0-\u0ba2\u0ba5-\u0ba7\u0bab-\u0bad\u0bba-\u0bbd\u0bc3-\u0bc5\u0bc9\u0bce-\u0bcf\u0bd1-\u0bd6\u0bd8-\u0be5\u0bfb-\u0bff\u0c0d\u0c11\u0c29\u0c3a-\u0c3c\u0c45\u0c49\u0c4e-\u0c54\u0c57\u0c5b-\u0c5f\u0c64-\u0c65\u0c70-\u0c77\u0c8d\u0c91\u0ca9\u0cb4\u0cba-\u0cbb\u0cc5\u0cc9\u0cce-\u0cd4\u0cd7-\u0cdd\u0cdf\u0ce4-\u0ce5\u0cf0\u0cf3-\u0cff\u0d04\u0d0d\u0d11\u0d45\u0d49\u0d50-\u0d53\u0d64-\u0d65\u0d80-\u0d81\u0d84\u0d97-\u0d99\u0db2\u0dbc\u0dbe-\u0dbf\u0dc7-\u0dc9\u0dcb-\u0dce\u0dd5\u0dd7\u0de0-\u0de5\u0df0-\u0df1\u0df5-\u0e00\u0e3b-\u0e3e\u0e5c-\u0e80\u0e83\u0e85-\u0e86\u0e89\u0e8b-\u0e8c\u0e8e-\u0e93\u0e98\u0ea0\u0ea4\u0ea6\u0ea8-\u0ea9\u0eac\u0eba\u0ebe-\u0ebf\u0ec5\u0ec7\u0ece-\u0ecf\u0eda-\u0edb\u0ee0-\u0eff\u0f48\u0f6d-\u0f70\u0f98\u0fbd\u0fcd\u0fdb-\u0fff\u10c6\u10c8-\u10cc\u10ce-\u10cf\u1249\u124e-\u124f\u1257\u1259\u125e-\u125f\u1289\u128e-\u128f\u12b1\u12b6-\u12b7\u12bf\u12c1\u12c6-\u12c7\u12d7\u1311\u1316-\u1317\u135b-\u135c\u137d-\u137f\u139a-\u139f\u13f6-\u13f7\u13fe-\u13ff\u169d-\u169f\u16f9-\u16ff\u170d\u1715-\u171f\u1737-\u173f\u1754-\u175f\u176d\u1771\u1774-\u177f\u17de-\u17df\u17ea-\u17ef\u17fa-\u17ff\u180f\u181a-\u181f\u1879-\u187f\u18ab-\u18af\u18f6-\u18ff\u191f\u192c-\u192f\u193c-\u193f\u1941-\u1943\u196e-\u196f\u1975-\u197f\u19ac-\u19af\u19ca-\u19cf\u19db-\u19dd\u1a1c-\u1a1d\u1a5f\u1a7d-\u1a7e\u1a8a-\u1a8f\u1a9a-\u1a9f\u1aae-\u1aaf\u1abf-\u1aff\u1b4c-\u1b4f\u1b7d-\u1b7f\u1bf4-\u1bfb\u1c38-\u1c3a\u1c4a-\u1c4c\u1c89-\u1c8f\u1cbb-\u1cbc\u1cc8-\u1ccf\u1cfa-\u1cff\u1dfa\u1f16-\u1f17\u1f1e-\u1f1f\u1f46-\u1f47\u1f4e-\u1f4f\u1f58\u1f5a\u1f5c\u1f5e\u1f7e-\u1f7f\u1fb5\u1fc5\u1fd4-\u1fd5\u1fdc\u1ff0-\u1ff1\u1ff5\u1fff\u2065\u2072-\u2073\u208f\u209d-\u209f\u20c0-\u20cf\u20f1-\u20ff\u218c-\u218f\u2427-\u243f\u244b-\u245f\u2b74-\u2b75\u2b96-\u2b97\u2bc9\u2bff\u2c2f\u2c5f\u2cf4-\u2cf8\u2d26\u2d28-\u2d2c\u2d2e-\u2d2f\u2d68-\u2d6e\u2d71-\u2d7e\u2d97-\u2d9f\u2da7\u2daf\u2db7\u2dbf\u2dc7\u2dcf\u2dd7\u2ddf\u2e4f-\u2e7f\u2e9a\u2ef4-\u2eff\u2fd6-\u2fef\u2ffc-\u2fff\u3040\u3097-\u3098\u3100-\u3104\u3130\u318f\u31bb-\u31bf\u31e4-\u31ef\u321f\u32ff\u4db6-\u4dbf\u9ff0-\u9fff\ua48d-\ua48f\ua4c7-\ua4cf\ua62c-\ua63f\ua6f8-\ua6ff\ua7ba-\ua7f6\ua82c-\ua82f\ua83a-\ua83f\ua878-\ua87f\ua8c6-\ua8cd\ua8da-\ua8df\ua954-\ua95e\ua97d-\ua97f\ua9ce\ua9da-\ua9dd\ua9ff\uaa37-\uaa3f\uaa4e-\uaa4f\uaa5a-\uaa5b\uaac3-\uaada\uaaf7-\uab00\uab07-\uab08\uab0f-\uab10\uab17-\uab1f\uab27\uab2f\uab66-\uab6f\uabee-\uabef\uabfa-\uabff\ud7a4-\ud7af\ud7c7-\ud7ca\ud7fc-\ud7ff\ufa6e-\ufa6f\ufada-\ufaff\ufb07-\ufb12\ufb18-\ufb1c\ufb37\ufb3d\ufb3f\ufb42\ufb45\ufbc2-\ufbd2\ufd40-\ufd4f\ufd90-\ufd91\ufdc8-\ufdef\ufdfe-\ufdff\ufe1a-\ufe1f\ufe53\ufe67\ufe6c-\ufe6f\ufe75\ufefd-\ufefe\uff00\uffbf-\uffc1\uffc8-\uffc9\uffd0-\uffd1\uffd8-\uffd9\uffdd-\uffdf\uffe7\uffef-\ufff8\ufffe-\uffff\U0001000c\U00010027\U0001003b\U0001003e\U0001004e-\U0001004f\U0001005e-\U0001007f\U000100fb-\U000100ff\U00010103-\U00010106\U00010134-\U00010136\U0001018f\U0001019c-\U0001019f\U000101a1-\U000101cf\U000101fe-\U0001027f\U0001029d-\U0001029f\U000102d1-\U000102df\U000102fc-\U000102ff\U00010324-\U0001032c\U0001034b-\U0001034f\U0001037b-\U0001037f\U0001039e\U000103c4-\U000103c7\U000103d6-\U000103ff\U0001049e-\U0001049f\U000104aa-\U000104af\U000104d4-\U000104d7\U000104fc-\U000104ff\U00010528-\U0001052f\U00010564-\U0001056e\U00010570-\U000105ff\U00010737-\U0001073f\U00010756-\U0001075f\U00010768-\U000107ff\U00010806-\U00010807\U00010809\U00010836\U00010839-\U0001083b\U0001083d-\U0001083e\U00010856\U0001089f-\U000108a6\U000108b0-\U000108df\U000108f3\U000108f6-\U000108fa\U0001091c-\U0001091e\U0001093a-\U0001093e\U00010940-\U0001097f\U000109b8-\U000109bb\U000109d0-\U000109d1\U00010a04\U00010a07-\U00010a0b\U00010a14\U00010a18\U00010a36-\U00010a37\U00010a3b-\U00010a3e\U00010a49-\U00010a4f\U00010a59-\U00010a5f\U00010aa0-\U00010abf\U00010ae7-\U00010aea\U00010af7-\U00010aff\U00010b36-\U00010b38\U00010b56-\U00010b57\U00010b73-\U00010b77\U00010b92-\U00010b98\U00010b9d-\U00010ba8\U00010bb0-\U00010bff\U00010c49-\U00010c7f\U00010cb3-\U00010cbf\U00010cf3-\U00010cf9\U00010d28-\U00010d2f\U00010d3a-\U00010e5f\U00010e7f-\U00010eff\U00010f28-\U00010f2f\U00010f5a-\U00010fff\U0001104e-\U00011051\U00011070-\U0001107e\U000110c2-\U000110cc\U000110ce-\U000110cf\U000110e9-\U000110ef\U000110fa-\U000110ff\U00011135\U00011147-\U0001114f\U00011177-\U0001117f\U000111ce-\U000111cf\U000111e0\U000111f5-\U000111ff\U00011212\U0001123f-\U0001127f\U00011287\U00011289\U0001128e\U0001129e\U000112aa-\U000112af\U000112eb-\U000112ef\U000112fa-\U000112ff\U00011304\U0001130d-\U0001130e\U00011311-\U00011312\U00011329\U00011331\U00011334\U0001133a\U00011345-\U00011346\U00011349-\U0001134a\U0001134e-\U0001134f\U00011351-\U00011356\U00011358-\U0001135c\U00011364-\U00011365\U0001136d-\U0001136f\U00011375-\U000113ff\U0001145a\U0001145c\U0001145f-\U0001147f\U000114c8-\U000114cf\U000114da-\U0001157f\U000115b6-\U000115b7\U000115de-\U000115ff\U00011645-\U0001164f\U0001165a-\U0001165f\U0001166d-\U0001167f\U000116b8-\U000116bf\U000116ca-\U000116ff\U0001171b-\U0001171c\U0001172c-\U0001172f\U00011740-\U000117ff\U0001183c-\U0001189f\U000118f3-\U000118fe\U00011900-\U000119ff\U00011a48-\U00011a4f\U00011a84-\U00011a85\U00011aa3-\U00011abf\U00011af9-\U00011bff\U00011c09\U00011c37\U00011c46-\U00011c4f\U00011c6d-\U00011c6f\U00011c90-\U00011c91\U00011ca8\U00011cb7-\U00011cff\U00011d07\U00011d0a\U00011d37-\U00011d39\U00011d3b\U00011d3e\U00011d48-\U00011d4f\U00011d5a-\U00011d5f\U00011d66\U00011d69\U00011d8f\U00011d92\U00011d99-\U00011d9f\U00011daa-\U00011edf\U00011ef9-\U00011fff\U0001239a-\U000123ff\U0001246f\U00012475-\U0001247f\U00012544-\U00012fff\U0001342f-\U000143ff\U00014647-\U000167ff\U00016a39-\U00016a3f\U00016a5f\U00016a6a-\U00016a6d\U00016a70-\U00016acf\U00016aee-\U00016aef\U00016af6-\U00016aff\U00016b46-\U00016b4f\U00016b5a\U00016b62\U00016b78-\U00016b7c\U00016b90-\U00016e3f\U00016e9b-\U00016eff\U00016f45-\U00016f4f\U00016f7f-\U00016f8e\U00016fa0-\U00016fdf\U00016fe2-\U00016fff\U000187f2-\U000187ff\U00018af3-\U0001afff\U0001b11f-\U0001b16f\U0001b2fc-\U0001bbff\U0001bc6b-\U0001bc6f\U0001bc7d-\U0001bc7f\U0001bc89-\U0001bc8f\U0001bc9a-\U0001bc9b\U0001bca4-\U0001cfff\U0001d0f6-\U0001d0ff\U0001d127-\U0001d128\U0001d1e9-\U0001d1ff\U0001d246-\U0001d2df\U0001d2f4-\U0001d2ff\U0001d357-\U0001d35f\U0001d379-\U0001d3ff\U0001d455\U0001d49d\U0001d4a0-\U0001d4a1\U0001d4a3-\U0001d4a4\U0001d4a7-\U0001d4a8\U0001d4ad\U0001d4ba\U0001d4bc\U0001d4c4\U0001d506\U0001d50b-\U0001d50c\U0001d515\U0001d51d\U0001d53a\U0001d53f\U0001d545\U0001d547-\U0001d549\U0001d551\U0001d6a6-\U0001d6a7\U0001d7cc-\U0001d7cd\U0001da8c-\U0001da9a\U0001daa0\U0001dab0-\U0001dfff\U0001e007\U0001e019-\U0001e01a\U0001e022\U0001e025\U0001e02b-\U0001e7ff\U0001e8c5-\U0001e8c6\U0001e8d7-\U0001e8ff\U0001e94b-\U0001e94f\U0001e95a-\U0001e95d\U0001e960-\U0001ec70\U0001ecb5-\U0001edff\U0001ee04\U0001ee20\U0001ee23\U0001ee25-\U0001ee26\U0001ee28\U0001ee33\U0001ee38\U0001ee3a\U0001ee3c-\U0001ee41\U0001ee43-\U0001ee46\U0001ee48\U0001ee4a\U0001ee4c\U0001ee50\U0001ee53\U0001ee55-\U0001ee56\U0001ee58\U0001ee5a\U0001ee5c\U0001ee5e\U0001ee60\U0001ee63\U0001ee65-\U0001ee66\U0001ee6b\U0001ee73\U0001ee78\U0001ee7d\U0001ee7f\U0001ee8a\U0001ee9c-\U0001eea0\U0001eea4\U0001eeaa\U0001eebc-\U0001eeef\U0001eef2-\U0001efff\U0001f02c-\U0001f02f\U0001f094-\U0001f09f\U0001f0af-\U0001f0b0\U0001f0c0\U0001f0d0\U0001f0f6-\U0001f0ff\U0001f10d-\U0001f10f\U0001f16c-\U0001f16f\U0001f1ad-\U0001f1e5\U0001f203-\U0001f20f\U0001f23c-\U0001f23f\U0001f249-\U0001f24f\U0001f252-\U0001f25f\U0001f266-\U0001f2ff\U0001f6d5-\U0001f6df\U0001f6ed-\U0001f6ef\U0001f6fa-\U0001f6ff\U0001f774-\U0001f77f\U0001f7d9-\U0001f7ff\U0001f80c-\U0001f80f\U0001f848-\U0001f84f\U0001f85a-\U0001f85f\U0001f888-\U0001f88f\U0001f8ae-\U0001f8ff\U0001f90c-\U0001f90f\U0001f93f\U0001f971-\U0001f972\U0001f977-\U0001f979\U0001f97b\U0001f9a3-\U0001f9af\U0001f9ba-\U0001f9bf\U0001f9c3-\U0001f9cf\U0001fa00-\U0001fa5f\U0001fa6e-\U0001ffff\U0002a6d7-\U0002a6ff\U0002b735-\U0002b73f\U0002b81e-\U0002b81f\U0002cea2-\U0002ceaf\U0002ebe1-\U0002f7ff\U0002fa1e-\U000e0000\U000e0002-\U000e001f\U000e0080-\U000e00ff\U000e01f0-\U000effff\U000ffffe-\U000fffff\U0010fffe-\U0010ffff'
+
+Co = '\ue000-\uf8ff\U000f0000-\U000ffffd\U00100000-\U0010fffd'
+
+Cs = '\ud800-\udbff\\\udc00\udc01-\udfff'
+
+Ll = 'a-z\xb5\xdf-\xf6\xf8-\xff\u0101\u0103\u0105\u0107\u0109\u010b\u010d\u010f\u0111\u0113\u0115\u0117\u0119\u011b\u011d\u011f\u0121\u0123\u0125\u0127\u0129\u012b\u012d\u012f\u0131\u0133\u0135\u0137-\u0138\u013a\u013c\u013e\u0140\u0142\u0144\u0146\u0148-\u0149\u014b\u014d\u014f\u0151\u0153\u0155\u0157\u0159\u015b\u015d\u015f\u0161\u0163\u0165\u0167\u0169\u016b\u016d\u016f\u0171\u0173\u0175\u0177\u017a\u017c\u017e-\u0180\u0183\u0185\u0188\u018c-\u018d\u0192\u0195\u0199-\u019b\u019e\u01a1\u01a3\u01a5\u01a8\u01aa-\u01ab\u01ad\u01b0\u01b4\u01b6\u01b9-\u01ba\u01bd-\u01bf\u01c6\u01c9\u01cc\u01ce\u01d0\u01d2\u01d4\u01d6\u01d8\u01da\u01dc-\u01dd\u01df\u01e1\u01e3\u01e5\u01e7\u01e9\u01eb\u01ed\u01ef-\u01f0\u01f3\u01f5\u01f9\u01fb\u01fd\u01ff\u0201\u0203\u0205\u0207\u0209\u020b\u020d\u020f\u0211\u0213\u0215\u0217\u0219\u021b\u021d\u021f\u0221\u0223\u0225\u0227\u0229\u022b\u022d\u022f\u0231\u0233-\u0239\u023c\u023f-\u0240\u0242\u0247\u0249\u024b\u024d\u024f-\u0293\u0295-\u02af\u0371\u0373\u0377\u037b-\u037d\u0390\u03ac-\u03ce\u03d0-\u03d1\u03d5-\u03d7\u03d9\u03db\u03dd\u03df\u03e1\u03e3\u03e5\u03e7\u03e9\u03eb\u03ed\u03ef-\u03f3\u03f5\u03f8\u03fb-\u03fc\u0430-\u045f\u0461\u0463\u0465\u0467\u0469\u046b\u046d\u046f\u0471\u0473\u0475\u0477\u0479\u047b\u047d\u047f\u0481\u048b\u048d\u048f\u0491\u0493\u0495\u0497\u0499\u049b\u049d\u049f\u04a1\u04a3\u04a5\u04a7\u04a9\u04ab\u04ad\u04af\u04b1\u04b3\u04b5\u04b7\u04b9\u04bb\u04bd\u04bf\u04c2\u04c4\u04c6\u04c8\u04ca\u04cc\u04ce-\u04cf\u04d1\u04d3\u04d5\u04d7\u04d9\u04db\u04dd\u04df\u04e1\u04e3\u04e5\u04e7\u04e9\u04eb\u04ed\u04ef\u04f1\u04f3\u04f5\u04f7\u04f9\u04fb\u04fd\u04ff\u0501\u0503\u0505\u0507\u0509\u050b\u050d\u050f\u0511\u0513\u0515\u0517\u0519\u051b\u051d\u051f\u0521\u0523\u0525\u0527\u0529\u052b\u052d\u052f\u0560-\u0588\u10d0-\u10fa\u10fd-\u10ff\u13f8-\u13fd\u1c80-\u1c88\u1d00-\u1d2b\u1d6b-\u1d77\u1d79-\u1d9a\u1e01\u1e03\u1e05\u1e07\u1e09\u1e0b\u1e0d\u1e0f\u1e11\u1e13\u1e15\u1e17\u1e19\u1e1b\u1e1d\u1e1f\u1e21\u1e23\u1e25\u1e27\u1e29\u1e2b\u1e2d\u1e2f\u1e31\u1e33\u1e35\u1e37\u1e39\u1e3b\u1e3d\u1e3f\u1e41\u1e43\u1e45\u1e47\u1e49\u1e4b\u1e4d\u1e4f\u1e51\u1e53\u1e55\u1e57\u1e59\u1e5b\u1e5d\u1e5f\u1e61\u1e63\u1e65\u1e67\u1e69\u1e6b\u1e6d\u1e6f\u1e71\u1e73\u1e75\u1e77\u1e79\u1e7b\u1e7d\u1e7f\u1e81\u1e83\u1e85\u1e87\u1e89\u1e8b\u1e8d\u1e8f\u1e91\u1e93\u1e95-\u1e9d\u1e9f\u1ea1\u1ea3\u1ea5\u1ea7\u1ea9\u1eab\u1ead\u1eaf\u1eb1\u1eb3\u1eb5\u1eb7\u1eb9\u1ebb\u1ebd\u1ebf\u1ec1\u1ec3\u1ec5\u1ec7\u1ec9\u1ecb\u1ecd\u1ecf\u1ed1\u1ed3\u1ed5\u1ed7\u1ed9\u1edb\u1edd\u1edf\u1ee1\u1ee3\u1ee5\u1ee7\u1ee9\u1eeb\u1eed\u1eef\u1ef1\u1ef3\u1ef5\u1ef7\u1ef9\u1efb\u1efd\u1eff-\u1f07\u1f10-\u1f15\u1f20-\u1f27\u1f30-\u1f37\u1f40-\u1f45\u1f50-\u1f57\u1f60-\u1f67\u1f70-\u1f7d\u1f80-\u1f87\u1f90-\u1f97\u1fa0-\u1fa7\u1fb0-\u1fb4\u1fb6-\u1fb7\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fc7\u1fd0-\u1fd3\u1fd6-\u1fd7\u1fe0-\u1fe7\u1ff2-\u1ff4\u1ff6-\u1ff7\u210a\u210e-\u210f\u2113\u212f\u2134\u2139\u213c-\u213d\u2146-\u2149\u214e\u2184\u2c30-\u2c5e\u2c61\u2c65-\u2c66\u2c68\u2c6a\u2c6c\u2c71\u2c73-\u2c74\u2c76-\u2c7b\u2c81\u2c83\u2c85\u2c87\u2c89\u2c8b\u2c8d\u2c8f\u2c91\u2c93\u2c95\u2c97\u2c99\u2c9b\u2c9d\u2c9f\u2ca1\u2ca3\u2ca5\u2ca7\u2ca9\u2cab\u2cad\u2caf\u2cb1\u2cb3\u2cb5\u2cb7\u2cb9\u2cbb\u2cbd\u2cbf\u2cc1\u2cc3\u2cc5\u2cc7\u2cc9\u2ccb\u2ccd\u2ccf\u2cd1\u2cd3\u2cd5\u2cd7\u2cd9\u2cdb\u2cdd\u2cdf\u2ce1\u2ce3-\u2ce4\u2cec\u2cee\u2cf3\u2d00-\u2d25\u2d27\u2d2d\ua641\ua643\ua645\ua647\ua649\ua64b\ua64d\ua64f\ua651\ua653\ua655\ua657\ua659\ua65b\ua65d\ua65f\ua661\ua663\ua665\ua667\ua669\ua66b\ua66d\ua681\ua683\ua685\ua687\ua689\ua68b\ua68d\ua68f\ua691\ua693\ua695\ua697\ua699\ua69b\ua723\ua725\ua727\ua729\ua72b\ua72d\ua72f-\ua731\ua733\ua735\ua737\ua739\ua73b\ua73d\ua73f\ua741\ua743\ua745\ua747\ua749\ua74b\ua74d\ua74f\ua751\ua753\ua755\ua757\ua759\ua75b\ua75d\ua75f\ua761\ua763\ua765\ua767\ua769\ua76b\ua76d\ua76f\ua771-\ua778\ua77a\ua77c\ua77f\ua781\ua783\ua785\ua787\ua78c\ua78e\ua791\ua793-\ua795\ua797\ua799\ua79b\ua79d\ua79f\ua7a1\ua7a3\ua7a5\ua7a7\ua7a9\ua7af\ua7b5\ua7b7\ua7b9\ua7fa\uab30-\uab5a\uab60-\uab65\uab70-\uabbf\ufb00-\ufb06\ufb13-\ufb17\uff41-\uff5a\U00010428-\U0001044f\U000104d8-\U000104fb\U00010cc0-\U00010cf2\U000118c0-\U000118df\U00016e60-\U00016e7f\U0001d41a-\U0001d433\U0001d44e-\U0001d454\U0001d456-\U0001d467\U0001d482-\U0001d49b\U0001d4b6-\U0001d4b9\U0001d4bb\U0001d4bd-\U0001d4c3\U0001d4c5-\U0001d4cf\U0001d4ea-\U0001d503\U0001d51e-\U0001d537\U0001d552-\U0001d56b\U0001d586-\U0001d59f\U0001d5ba-\U0001d5d3\U0001d5ee-\U0001d607\U0001d622-\U0001d63b\U0001d656-\U0001d66f\U0001d68a-\U0001d6a5\U0001d6c2-\U0001d6da\U0001d6dc-\U0001d6e1\U0001d6fc-\U0001d714\U0001d716-\U0001d71b\U0001d736-\U0001d74e\U0001d750-\U0001d755\U0001d770-\U0001d788\U0001d78a-\U0001d78f\U0001d7aa-\U0001d7c2\U0001d7c4-\U0001d7c9\U0001d7cb\U0001e922-\U0001e943'
+
+Lm = '\u02b0-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0374\u037a\u0559\u0640\u06e5-\u06e6\u07f4-\u07f5\u07fa\u081a\u0824\u0828\u0971\u0e46\u0ec6\u10fc\u17d7\u1843\u1aa7\u1c78-\u1c7d\u1d2c-\u1d6a\u1d78\u1d9b-\u1dbf\u2071\u207f\u2090-\u209c\u2c7c-\u2c7d\u2d6f\u2e2f\u3005\u3031-\u3035\u303b\u309d-\u309e\u30fc-\u30fe\ua015\ua4f8-\ua4fd\ua60c\ua67f\ua69c-\ua69d\ua717-\ua71f\ua770\ua788\ua7f8-\ua7f9\ua9cf\ua9e6\uaa70\uaadd\uaaf3-\uaaf4\uab5c-\uab5f\uff70\uff9e-\uff9f\U00016b40-\U00016b43\U00016f93-\U00016f9f\U00016fe0-\U00016fe1'
+
+Lo = '\xaa\xba\u01bb\u01c0-\u01c3\u0294\u05d0-\u05ea\u05ef-\u05f2\u0620-\u063f\u0641-\u064a\u066e-\u066f\u0671-\u06d3\u06d5\u06ee-\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u0800-\u0815\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0972-\u0980\u0985-\u098c\u098f-\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc-\u09dd\u09df-\u09e1\u09f0-\u09f1\u09fc\u0a05-\u0a0a\u0a0f-\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32-\u0a33\u0a35-\u0a36\u0a38-\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2-\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0-\u0ae1\u0af9\u0b05-\u0b0c\u0b0f-\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32-\u0b33\u0b35-\u0b39\u0b3d\u0b5c-\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99-\u0b9a\u0b9c\u0b9e-\u0b9f\u0ba3-\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60-\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0-\u0ce1\u0cf1-\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32-\u0e33\u0e40-\u0e45\u0e81-\u0e82\u0e84\u0e87-\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa-\u0eab\u0ead-\u0eb0\u0eb2-\u0eb3\u0ebd\u0ec0-\u0ec4\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065-\u1066\u106e-\u1070\u1075-\u1081\u108e\u1100-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16f1-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17dc\u1820-\u1842\u1844-\u1878\u1880-\u1884\u1887-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae-\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c77\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5-\u1cf6\u2135-\u2138\u2d30-\u2d67\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3006\u303c\u3041-\u3096\u309f\u30a1-\u30fa\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua014\ua016-\ua48c\ua4d0-\ua4f7\ua500-\ua60b\ua610-\ua61f\ua62a-\ua62b\ua66e\ua6a0-\ua6e5\ua78f\ua7f7\ua7fb-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd-\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9e0-\ua9e4\ua9e7-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa6f\uaa71-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5-\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadc\uaae0-\uaaea\uaaf2\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uabc0-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff66-\uff6f\uff71-\uff9d\uffa0-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc\U00010000-\U0001000b\U0001000d-\U00010026\U00010028-\U0001003a\U0001003c-\U0001003d\U0001003f-\U0001004d\U00010050-\U0001005d\U00010080-\U000100fa\U00010280-\U0001029c\U000102a0-\U000102d0\U00010300-\U0001031f\U0001032d-\U00010340\U00010342-\U00010349\U00010350-\U00010375\U00010380-\U0001039d\U000103a0-\U000103c3\U000103c8-\U000103cf\U00010450-\U0001049d\U00010500-\U00010527\U00010530-\U00010563\U00010600-\U00010736\U00010740-\U00010755\U00010760-\U00010767\U00010800-\U00010805\U00010808\U0001080a-\U00010835\U00010837-\U00010838\U0001083c\U0001083f-\U00010855\U00010860-\U00010876\U00010880-\U0001089e\U000108e0-\U000108f2\U000108f4-\U000108f5\U00010900-\U00010915\U00010920-\U00010939\U00010980-\U000109b7\U000109be-\U000109bf\U00010a00\U00010a10-\U00010a13\U00010a15-\U00010a17\U00010a19-\U00010a35\U00010a60-\U00010a7c\U00010a80-\U00010a9c\U00010ac0-\U00010ac7\U00010ac9-\U00010ae4\U00010b00-\U00010b35\U00010b40-\U00010b55\U00010b60-\U00010b72\U00010b80-\U00010b91\U00010c00-\U00010c48\U00010d00-\U00010d23\U00010f00-\U00010f1c\U00010f27\U00010f30-\U00010f45\U00011003-\U00011037\U00011083-\U000110af\U000110d0-\U000110e8\U00011103-\U00011126\U00011144\U00011150-\U00011172\U00011176\U00011183-\U000111b2\U000111c1-\U000111c4\U000111da\U000111dc\U00011200-\U00011211\U00011213-\U0001122b\U00011280-\U00011286\U00011288\U0001128a-\U0001128d\U0001128f-\U0001129d\U0001129f-\U000112a8\U000112b0-\U000112de\U00011305-\U0001130c\U0001130f-\U00011310\U00011313-\U00011328\U0001132a-\U00011330\U00011332-\U00011333\U00011335-\U00011339\U0001133d\U00011350\U0001135d-\U00011361\U00011400-\U00011434\U00011447-\U0001144a\U00011480-\U000114af\U000114c4-\U000114c5\U000114c7\U00011580-\U000115ae\U000115d8-\U000115db\U00011600-\U0001162f\U00011644\U00011680-\U000116aa\U00011700-\U0001171a\U00011800-\U0001182b\U000118ff\U00011a00\U00011a0b-\U00011a32\U00011a3a\U00011a50\U00011a5c-\U00011a83\U00011a86-\U00011a89\U00011a9d\U00011ac0-\U00011af8\U00011c00-\U00011c08\U00011c0a-\U00011c2e\U00011c40\U00011c72-\U00011c8f\U00011d00-\U00011d06\U00011d08-\U00011d09\U00011d0b-\U00011d30\U00011d46\U00011d60-\U00011d65\U00011d67-\U00011d68\U00011d6a-\U00011d89\U00011d98\U00011ee0-\U00011ef2\U00012000-\U00012399\U00012480-\U00012543\U00013000-\U0001342e\U00014400-\U00014646\U00016800-\U00016a38\U00016a40-\U00016a5e\U00016ad0-\U00016aed\U00016b00-\U00016b2f\U00016b63-\U00016b77\U00016b7d-\U00016b8f\U00016f00-\U00016f44\U00016f50\U00017000-\U000187f1\U00018800-\U00018af2\U0001b000-\U0001b11e\U0001b170-\U0001b2fb\U0001bc00-\U0001bc6a\U0001bc70-\U0001bc7c\U0001bc80-\U0001bc88\U0001bc90-\U0001bc99\U0001e800-\U0001e8c4\U0001ee00-\U0001ee03\U0001ee05-\U0001ee1f\U0001ee21-\U0001ee22\U0001ee24\U0001ee27\U0001ee29-\U0001ee32\U0001ee34-\U0001ee37\U0001ee39\U0001ee3b\U0001ee42\U0001ee47\U0001ee49\U0001ee4b\U0001ee4d-\U0001ee4f\U0001ee51-\U0001ee52\U0001ee54\U0001ee57\U0001ee59\U0001ee5b\U0001ee5d\U0001ee5f\U0001ee61-\U0001ee62\U0001ee64\U0001ee67-\U0001ee6a\U0001ee6c-\U0001ee72\U0001ee74-\U0001ee77\U0001ee79-\U0001ee7c\U0001ee7e\U0001ee80-\U0001ee89\U0001ee8b-\U0001ee9b\U0001eea1-\U0001eea3\U0001eea5-\U0001eea9\U0001eeab-\U0001eebb\U00020000-\U0002a6d6\U0002a700-\U0002b734\U0002b740-\U0002b81d\U0002b820-\U0002cea1\U0002ceb0-\U0002ebe0\U0002f800-\U0002fa1d'
+
+Lt = '\u01c5\u01c8\u01cb\u01f2\u1f88-\u1f8f\u1f98-\u1f9f\u1fa8-\u1faf\u1fbc\u1fcc\u1ffc'
+
+Lu = 'A-Z\xc0-\xd6\xd8-\xde\u0100\u0102\u0104\u0106\u0108\u010a\u010c\u010e\u0110\u0112\u0114\u0116\u0118\u011a\u011c\u011e\u0120\u0122\u0124\u0126\u0128\u012a\u012c\u012e\u0130\u0132\u0134\u0136\u0139\u013b\u013d\u013f\u0141\u0143\u0145\u0147\u014a\u014c\u014e\u0150\u0152\u0154\u0156\u0158\u015a\u015c\u015e\u0160\u0162\u0164\u0166\u0168\u016a\u016c\u016e\u0170\u0172\u0174\u0176\u0178-\u0179\u017b\u017d\u0181-\u0182\u0184\u0186-\u0187\u0189-\u018b\u018e-\u0191\u0193-\u0194\u0196-\u0198\u019c-\u019d\u019f-\u01a0\u01a2\u01a4\u01a6-\u01a7\u01a9\u01ac\u01ae-\u01af\u01b1-\u01b3\u01b5\u01b7-\u01b8\u01bc\u01c4\u01c7\u01ca\u01cd\u01cf\u01d1\u01d3\u01d5\u01d7\u01d9\u01db\u01de\u01e0\u01e2\u01e4\u01e6\u01e8\u01ea\u01ec\u01ee\u01f1\u01f4\u01f6-\u01f8\u01fa\u01fc\u01fe\u0200\u0202\u0204\u0206\u0208\u020a\u020c\u020e\u0210\u0212\u0214\u0216\u0218\u021a\u021c\u021e\u0220\u0222\u0224\u0226\u0228\u022a\u022c\u022e\u0230\u0232\u023a-\u023b\u023d-\u023e\u0241\u0243-\u0246\u0248\u024a\u024c\u024e\u0370\u0372\u0376\u037f\u0386\u0388-\u038a\u038c\u038e-\u038f\u0391-\u03a1\u03a3-\u03ab\u03cf\u03d2-\u03d4\u03d8\u03da\u03dc\u03de\u03e0\u03e2\u03e4\u03e6\u03e8\u03ea\u03ec\u03ee\u03f4\u03f7\u03f9-\u03fa\u03fd-\u042f\u0460\u0462\u0464\u0466\u0468\u046a\u046c\u046e\u0470\u0472\u0474\u0476\u0478\u047a\u047c\u047e\u0480\u048a\u048c\u048e\u0490\u0492\u0494\u0496\u0498\u049a\u049c\u049e\u04a0\u04a2\u04a4\u04a6\u04a8\u04aa\u04ac\u04ae\u04b0\u04b2\u04b4\u04b6\u04b8\u04ba\u04bc\u04be\u04c0-\u04c1\u04c3\u04c5\u04c7\u04c9\u04cb\u04cd\u04d0\u04d2\u04d4\u04d6\u04d8\u04da\u04dc\u04de\u04e0\u04e2\u04e4\u04e6\u04e8\u04ea\u04ec\u04ee\u04f0\u04f2\u04f4\u04f6\u04f8\u04fa\u04fc\u04fe\u0500\u0502\u0504\u0506\u0508\u050a\u050c\u050e\u0510\u0512\u0514\u0516\u0518\u051a\u051c\u051e\u0520\u0522\u0524\u0526\u0528\u052a\u052c\u052e\u0531-\u0556\u10a0-\u10c5\u10c7\u10cd\u13a0-\u13f5\u1c90-\u1cba\u1cbd-\u1cbf\u1e00\u1e02\u1e04\u1e06\u1e08\u1e0a\u1e0c\u1e0e\u1e10\u1e12\u1e14\u1e16\u1e18\u1e1a\u1e1c\u1e1e\u1e20\u1e22\u1e24\u1e26\u1e28\u1e2a\u1e2c\u1e2e\u1e30\u1e32\u1e34\u1e36\u1e38\u1e3a\u1e3c\u1e3e\u1e40\u1e42\u1e44\u1e46\u1e48\u1e4a\u1e4c\u1e4e\u1e50\u1e52\u1e54\u1e56\u1e58\u1e5a\u1e5c\u1e5e\u1e60\u1e62\u1e64\u1e66\u1e68\u1e6a\u1e6c\u1e6e\u1e70\u1e72\u1e74\u1e76\u1e78\u1e7a\u1e7c\u1e7e\u1e80\u1e82\u1e84\u1e86\u1e88\u1e8a\u1e8c\u1e8e\u1e90\u1e92\u1e94\u1e9e\u1ea0\u1ea2\u1ea4\u1ea6\u1ea8\u1eaa\u1eac\u1eae\u1eb0\u1eb2\u1eb4\u1eb6\u1eb8\u1eba\u1ebc\u1ebe\u1ec0\u1ec2\u1ec4\u1ec6\u1ec8\u1eca\u1ecc\u1ece\u1ed0\u1ed2\u1ed4\u1ed6\u1ed8\u1eda\u1edc\u1ede\u1ee0\u1ee2\u1ee4\u1ee6\u1ee8\u1eea\u1eec\u1eee\u1ef0\u1ef2\u1ef4\u1ef6\u1ef8\u1efa\u1efc\u1efe\u1f08-\u1f0f\u1f18-\u1f1d\u1f28-\u1f2f\u1f38-\u1f3f\u1f48-\u1f4d\u1f59\u1f5b\u1f5d\u1f5f\u1f68-\u1f6f\u1fb8-\u1fbb\u1fc8-\u1fcb\u1fd8-\u1fdb\u1fe8-\u1fec\u1ff8-\u1ffb\u2102\u2107\u210b-\u210d\u2110-\u2112\u2115\u2119-\u211d\u2124\u2126\u2128\u212a-\u212d\u2130-\u2133\u213e-\u213f\u2145\u2183\u2c00-\u2c2e\u2c60\u2c62-\u2c64\u2c67\u2c69\u2c6b\u2c6d-\u2c70\u2c72\u2c75\u2c7e-\u2c80\u2c82\u2c84\u2c86\u2c88\u2c8a\u2c8c\u2c8e\u2c90\u2c92\u2c94\u2c96\u2c98\u2c9a\u2c9c\u2c9e\u2ca0\u2ca2\u2ca4\u2ca6\u2ca8\u2caa\u2cac\u2cae\u2cb0\u2cb2\u2cb4\u2cb6\u2cb8\u2cba\u2cbc\u2cbe\u2cc0\u2cc2\u2cc4\u2cc6\u2cc8\u2cca\u2ccc\u2cce\u2cd0\u2cd2\u2cd4\u2cd6\u2cd8\u2cda\u2cdc\u2cde\u2ce0\u2ce2\u2ceb\u2ced\u2cf2\ua640\ua642\ua644\ua646\ua648\ua64a\ua64c\ua64e\ua650\ua652\ua654\ua656\ua658\ua65a\ua65c\ua65e\ua660\ua662\ua664\ua666\ua668\ua66a\ua66c\ua680\ua682\ua684\ua686\ua688\ua68a\ua68c\ua68e\ua690\ua692\ua694\ua696\ua698\ua69a\ua722\ua724\ua726\ua728\ua72a\ua72c\ua72e\ua732\ua734\ua736\ua738\ua73a\ua73c\ua73e\ua740\ua742\ua744\ua746\ua748\ua74a\ua74c\ua74e\ua750\ua752\ua754\ua756\ua758\ua75a\ua75c\ua75e\ua760\ua762\ua764\ua766\ua768\ua76a\ua76c\ua76e\ua779\ua77b\ua77d-\ua77e\ua780\ua782\ua784\ua786\ua78b\ua78d\ua790\ua792\ua796\ua798\ua79a\ua79c\ua79e\ua7a0\ua7a2\ua7a4\ua7a6\ua7a8\ua7aa-\ua7ae\ua7b0-\ua7b4\ua7b6\ua7b8\uff21-\uff3a\U00010400-\U00010427\U000104b0-\U000104d3\U00010c80-\U00010cb2\U000118a0-\U000118bf\U00016e40-\U00016e5f\U0001d400-\U0001d419\U0001d434-\U0001d44d\U0001d468-\U0001d481\U0001d49c\U0001d49e-\U0001d49f\U0001d4a2\U0001d4a5-\U0001d4a6\U0001d4a9-\U0001d4ac\U0001d4ae-\U0001d4b5\U0001d4d0-\U0001d4e9\U0001d504-\U0001d505\U0001d507-\U0001d50a\U0001d50d-\U0001d514\U0001d516-\U0001d51c\U0001d538-\U0001d539\U0001d53b-\U0001d53e\U0001d540-\U0001d544\U0001d546\U0001d54a-\U0001d550\U0001d56c-\U0001d585\U0001d5a0-\U0001d5b9\U0001d5d4-\U0001d5ed\U0001d608-\U0001d621\U0001d63c-\U0001d655\U0001d670-\U0001d689\U0001d6a8-\U0001d6c0\U0001d6e2-\U0001d6fa\U0001d71c-\U0001d734\U0001d756-\U0001d76e\U0001d790-\U0001d7a8\U0001d7ca\U0001e900-\U0001e921'
+
+Mc = '\u0903\u093b\u093e-\u0940\u0949-\u094c\u094e-\u094f\u0982-\u0983\u09be-\u09c0\u09c7-\u09c8\u09cb-\u09cc\u09d7\u0a03\u0a3e-\u0a40\u0a83\u0abe-\u0ac0\u0ac9\u0acb-\u0acc\u0b02-\u0b03\u0b3e\u0b40\u0b47-\u0b48\u0b4b-\u0b4c\u0b57\u0bbe-\u0bbf\u0bc1-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcc\u0bd7\u0c01-\u0c03\u0c41-\u0c44\u0c82-\u0c83\u0cbe\u0cc0-\u0cc4\u0cc7-\u0cc8\u0cca-\u0ccb\u0cd5-\u0cd6\u0d02-\u0d03\u0d3e-\u0d40\u0d46-\u0d48\u0d4a-\u0d4c\u0d57\u0d82-\u0d83\u0dcf-\u0dd1\u0dd8-\u0ddf\u0df2-\u0df3\u0f3e-\u0f3f\u0f7f\u102b-\u102c\u1031\u1038\u103b-\u103c\u1056-\u1057\u1062-\u1064\u1067-\u106d\u1083-\u1084\u1087-\u108c\u108f\u109a-\u109c\u17b6\u17be-\u17c5\u17c7-\u17c8\u1923-\u1926\u1929-\u192b\u1930-\u1931\u1933-\u1938\u1a19-\u1a1a\u1a55\u1a57\u1a61\u1a63-\u1a64\u1a6d-\u1a72\u1b04\u1b35\u1b3b\u1b3d-\u1b41\u1b43-\u1b44\u1b82\u1ba1\u1ba6-\u1ba7\u1baa\u1be7\u1bea-\u1bec\u1bee\u1bf2-\u1bf3\u1c24-\u1c2b\u1c34-\u1c35\u1ce1\u1cf2-\u1cf3\u1cf7\u302e-\u302f\ua823-\ua824\ua827\ua880-\ua881\ua8b4-\ua8c3\ua952-\ua953\ua983\ua9b4-\ua9b5\ua9ba-\ua9bb\ua9bd-\ua9c0\uaa2f-\uaa30\uaa33-\uaa34\uaa4d\uaa7b\uaa7d\uaaeb\uaaee-\uaaef\uaaf5\uabe3-\uabe4\uabe6-\uabe7\uabe9-\uabea\uabec\U00011000\U00011002\U00011082\U000110b0-\U000110b2\U000110b7-\U000110b8\U0001112c\U00011145-\U00011146\U00011182\U000111b3-\U000111b5\U000111bf-\U000111c0\U0001122c-\U0001122e\U00011232-\U00011233\U00011235\U000112e0-\U000112e2\U00011302-\U00011303\U0001133e-\U0001133f\U00011341-\U00011344\U00011347-\U00011348\U0001134b-\U0001134d\U00011357\U00011362-\U00011363\U00011435-\U00011437\U00011440-\U00011441\U00011445\U000114b0-\U000114b2\U000114b9\U000114bb-\U000114be\U000114c1\U000115af-\U000115b1\U000115b8-\U000115bb\U000115be\U00011630-\U00011632\U0001163b-\U0001163c\U0001163e\U000116ac\U000116ae-\U000116af\U000116b6\U00011720-\U00011721\U00011726\U0001182c-\U0001182e\U00011838\U00011a39\U00011a57-\U00011a58\U00011a97\U00011c2f\U00011c3e\U00011ca9\U00011cb1\U00011cb4\U00011d8a-\U00011d8e\U00011d93-\U00011d94\U00011d96\U00011ef5-\U00011ef6\U00016f51-\U00016f7e\U0001d165-\U0001d166\U0001d16d-\U0001d172'
+
+Me = '\u0488-\u0489\u1abe\u20dd-\u20e0\u20e2-\u20e4\ua670-\ua672'
+
+Mn = '\u0300-\u036f\u0483-\u0487\u0591-\u05bd\u05bf\u05c1-\u05c2\u05c4-\u05c5\u05c7\u0610-\u061a\u064b-\u065f\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7-\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0902\u093a\u093c\u0941-\u0948\u094d\u0951-\u0957\u0962-\u0963\u0981\u09bc\u09c1-\u09c4\u09cd\u09e2-\u09e3\u09fe\u0a01-\u0a02\u0a3c\u0a41-\u0a42\u0a47-\u0a48\u0a4b-\u0a4d\u0a51\u0a70-\u0a71\u0a75\u0a81-\u0a82\u0abc\u0ac1-\u0ac5\u0ac7-\u0ac8\u0acd\u0ae2-\u0ae3\u0afa-\u0aff\u0b01\u0b3c\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b62-\u0b63\u0b82\u0bc0\u0bcd\u0c00\u0c04\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55-\u0c56\u0c62-\u0c63\u0c81\u0cbc\u0cbf\u0cc6\u0ccc-\u0ccd\u0ce2-\u0ce3\u0d00-\u0d01\u0d3b-\u0d3c\u0d41-\u0d44\u0d4d\u0d62-\u0d63\u0dca\u0dd2-\u0dd4\u0dd6\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb-\u0ebc\u0ec8-\u0ecd\u0f18-\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86-\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039-\u103a\u103d-\u103e\u1058-\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085-\u1086\u108d\u109d\u135d-\u135f\u1712-\u1714\u1732-\u1734\u1752-\u1753\u1772-\u1773\u17b4-\u17b5\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u1885-\u1886\u18a9\u1920-\u1922\u1927-\u1928\u1932\u1939-\u193b\u1a17-\u1a18\u1a1b\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1ab0-\u1abd\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80-\u1b81\u1ba2-\u1ba5\u1ba8-\u1ba9\u1bab-\u1bad\u1be6\u1be8-\u1be9\u1bed\u1bef-\u1bf1\u1c2c-\u1c33\u1c36-\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1cf4\u1cf8-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302d\u3099-\u309a\ua66f\ua674-\ua67d\ua69e-\ua69f\ua6f0-\ua6f1\ua802\ua806\ua80b\ua825-\ua826\ua8c4-\ua8c5\ua8e0-\ua8f1\ua8ff\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\ua9e5\uaa29-\uaa2e\uaa31-\uaa32\uaa35-\uaa36\uaa43\uaa4c\uaa7c\uaab0\uaab2-\uaab4\uaab7-\uaab8\uaabe-\uaabf\uaac1\uaaec-\uaaed\uaaf6\uabe5\uabe8\uabed\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\U000101fd\U000102e0\U00010376-\U0001037a\U00010a01-\U00010a03\U00010a05-\U00010a06\U00010a0c-\U00010a0f\U00010a38-\U00010a3a\U00010a3f\U00010ae5-\U00010ae6\U00010d24-\U00010d27\U00010f46-\U00010f50\U00011001\U00011038-\U00011046\U0001107f-\U00011081\U000110b3-\U000110b6\U000110b9-\U000110ba\U00011100-\U00011102\U00011127-\U0001112b\U0001112d-\U00011134\U00011173\U00011180-\U00011181\U000111b6-\U000111be\U000111c9-\U000111cc\U0001122f-\U00011231\U00011234\U00011236-\U00011237\U0001123e\U000112df\U000112e3-\U000112ea\U00011300-\U00011301\U0001133b-\U0001133c\U00011340\U00011366-\U0001136c\U00011370-\U00011374\U00011438-\U0001143f\U00011442-\U00011444\U00011446\U0001145e\U000114b3-\U000114b8\U000114ba\U000114bf-\U000114c0\U000114c2-\U000114c3\U000115b2-\U000115b5\U000115bc-\U000115bd\U000115bf-\U000115c0\U000115dc-\U000115dd\U00011633-\U0001163a\U0001163d\U0001163f-\U00011640\U000116ab\U000116ad\U000116b0-\U000116b5\U000116b7\U0001171d-\U0001171f\U00011722-\U00011725\U00011727-\U0001172b\U0001182f-\U00011837\U00011839-\U0001183a\U00011a01-\U00011a0a\U00011a33-\U00011a38\U00011a3b-\U00011a3e\U00011a47\U00011a51-\U00011a56\U00011a59-\U00011a5b\U00011a8a-\U00011a96\U00011a98-\U00011a99\U00011c30-\U00011c36\U00011c38-\U00011c3d\U00011c3f\U00011c92-\U00011ca7\U00011caa-\U00011cb0\U00011cb2-\U00011cb3\U00011cb5-\U00011cb6\U00011d31-\U00011d36\U00011d3a\U00011d3c-\U00011d3d\U00011d3f-\U00011d45\U00011d47\U00011d90-\U00011d91\U00011d95\U00011d97\U00011ef3-\U00011ef4\U00016af0-\U00016af4\U00016b30-\U00016b36\U00016f8f-\U00016f92\U0001bc9d-\U0001bc9e\U0001d167-\U0001d169\U0001d17b-\U0001d182\U0001d185-\U0001d18b\U0001d1aa-\U0001d1ad\U0001d242-\U0001d244\U0001da00-\U0001da36\U0001da3b-\U0001da6c\U0001da75\U0001da84\U0001da9b-\U0001da9f\U0001daa1-\U0001daaf\U0001e000-\U0001e006\U0001e008-\U0001e018\U0001e01b-\U0001e021\U0001e023-\U0001e024\U0001e026-\U0001e02a\U0001e8d0-\U0001e8d6\U0001e944-\U0001e94a\U000e0100-\U000e01ef'
+
+Nd = '0-9\u0660-\u0669\u06f0-\u06f9\u07c0-\u07c9\u0966-\u096f\u09e6-\u09ef\u0a66-\u0a6f\u0ae6-\u0aef\u0b66-\u0b6f\u0be6-\u0bef\u0c66-\u0c6f\u0ce6-\u0cef\u0d66-\u0d6f\u0de6-\u0def\u0e50-\u0e59\u0ed0-\u0ed9\u0f20-\u0f29\u1040-\u1049\u1090-\u1099\u17e0-\u17e9\u1810-\u1819\u1946-\u194f\u19d0-\u19d9\u1a80-\u1a89\u1a90-\u1a99\u1b50-\u1b59\u1bb0-\u1bb9\u1c40-\u1c49\u1c50-\u1c59\ua620-\ua629\ua8d0-\ua8d9\ua900-\ua909\ua9d0-\ua9d9\ua9f0-\ua9f9\uaa50-\uaa59\uabf0-\uabf9\uff10-\uff19\U000104a0-\U000104a9\U00010d30-\U00010d39\U00011066-\U0001106f\U000110f0-\U000110f9\U00011136-\U0001113f\U000111d0-\U000111d9\U000112f0-\U000112f9\U00011450-\U00011459\U000114d0-\U000114d9\U00011650-\U00011659\U000116c0-\U000116c9\U00011730-\U00011739\U000118e0-\U000118e9\U00011c50-\U00011c59\U00011d50-\U00011d59\U00011da0-\U00011da9\U00016a60-\U00016a69\U00016b50-\U00016b59\U0001d7ce-\U0001d7ff\U0001e950-\U0001e959'
+
+Nl = '\u16ee-\u16f0\u2160-\u2182\u2185-\u2188\u3007\u3021-\u3029\u3038-\u303a\ua6e6-\ua6ef\U00010140-\U00010174\U00010341\U0001034a\U000103d1-\U000103d5\U00012400-\U0001246e'
+
+No = '\xb2-\xb3\xb9\xbc-\xbe\u09f4-\u09f9\u0b72-\u0b77\u0bf0-\u0bf2\u0c78-\u0c7e\u0d58-\u0d5e\u0d70-\u0d78\u0f2a-\u0f33\u1369-\u137c\u17f0-\u17f9\u19da\u2070\u2074-\u2079\u2080-\u2089\u2150-\u215f\u2189\u2460-\u249b\u24ea-\u24ff\u2776-\u2793\u2cfd\u3192-\u3195\u3220-\u3229\u3248-\u324f\u3251-\u325f\u3280-\u3289\u32b1-\u32bf\ua830-\ua835\U00010107-\U00010133\U00010175-\U00010178\U0001018a-\U0001018b\U000102e1-\U000102fb\U00010320-\U00010323\U00010858-\U0001085f\U00010879-\U0001087f\U000108a7-\U000108af\U000108fb-\U000108ff\U00010916-\U0001091b\U000109bc-\U000109bd\U000109c0-\U000109cf\U000109d2-\U000109ff\U00010a40-\U00010a48\U00010a7d-\U00010a7e\U00010a9d-\U00010a9f\U00010aeb-\U00010aef\U00010b58-\U00010b5f\U00010b78-\U00010b7f\U00010ba9-\U00010baf\U00010cfa-\U00010cff\U00010e60-\U00010e7e\U00010f1d-\U00010f26\U00010f51-\U00010f54\U00011052-\U00011065\U000111e1-\U000111f4\U0001173a-\U0001173b\U000118ea-\U000118f2\U00011c5a-\U00011c6c\U00016b5b-\U00016b61\U00016e80-\U00016e96\U0001d2e0-\U0001d2f3\U0001d360-\U0001d378\U0001e8c7-\U0001e8cf\U0001ec71-\U0001ecab\U0001ecad-\U0001ecaf\U0001ecb1-\U0001ecb4\U0001f100-\U0001f10c'
+
+Pc = '_\u203f-\u2040\u2054\ufe33-\ufe34\ufe4d-\ufe4f\uff3f'
+
+Pd = '\\-\u058a\u05be\u1400\u1806\u2010-\u2015\u2e17\u2e1a\u2e3a-\u2e3b\u2e40\u301c\u3030\u30a0\ufe31-\ufe32\ufe58\ufe63\uff0d'
+
+Pe = ')\\]}\u0f3b\u0f3d\u169c\u2046\u207e\u208e\u2309\u230b\u232a\u2769\u276b\u276d\u276f\u2771\u2773\u2775\u27c6\u27e7\u27e9\u27eb\u27ed\u27ef\u2984\u2986\u2988\u298a\u298c\u298e\u2990\u2992\u2994\u2996\u2998\u29d9\u29db\u29fd\u2e23\u2e25\u2e27\u2e29\u3009\u300b\u300d\u300f\u3011\u3015\u3017\u3019\u301b\u301e-\u301f\ufd3e\ufe18\ufe36\ufe38\ufe3a\ufe3c\ufe3e\ufe40\ufe42\ufe44\ufe48\ufe5a\ufe5c\ufe5e\uff09\uff3d\uff5d\uff60\uff63'
+
+Pf = '\xbb\u2019\u201d\u203a\u2e03\u2e05\u2e0a\u2e0d\u2e1d\u2e21'
+
+Pi = '\xab\u2018\u201b-\u201c\u201f\u2039\u2e02\u2e04\u2e09\u2e0c\u2e1c\u2e20'
+
+Po = "!-#%-'*,.-/:-;?-@\\\\\xa1\xa7\xb6-\xb7\xbf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3-\u05f4\u0609-\u060a\u060c-\u060d\u061b\u061e-\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964-\u0965\u0970\u09fd\u0a76\u0af0\u0c84\u0df4\u0e4f\u0e5a-\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9-\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d-\u166e\u16eb-\u16ed\u1735-\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944-\u1945\u1a1e-\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e-\u1c7f\u1cc0-\u1cc7\u1cd3\u2016-\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe-\u2cff\u2d70\u2e00-\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18-\u2e19\u2e1b\u2e1e-\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u2e3c-\u2e3f\u2e41\u2e43-\u2e4e\u3001-\u3003\u303d\u30fb\ua4fe-\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce-\ua8cf\ua8f8-\ua8fa\ua8fc\ua92e-\ua92f\ua95f\ua9c1-\ua9cd\ua9de-\ua9df\uaa5c-\uaa5f\uaade-\uaadf\uaaf0-\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45-\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a-\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e-\uff0f\uff1a-\uff1b\uff1f-\uff20\uff3c\uff61\uff64-\uff65\U00010100-\U00010102\U0001039f\U000103d0\U0001056f\U00010857\U0001091f\U0001093f\U00010a50-\U00010a58\U00010a7f\U00010af0-\U00010af6\U00010b39-\U00010b3f\U00010b99-\U00010b9c\U00010f55-\U00010f59\U00011047-\U0001104d\U000110bb-\U000110bc\U000110be-\U000110c1\U00011140-\U00011143\U00011174-\U00011175\U000111c5-\U000111c8\U000111cd\U000111db\U000111dd-\U000111df\U00011238-\U0001123d\U000112a9\U0001144b-\U0001144f\U0001145b\U0001145d\U000114c6\U000115c1-\U000115d7\U00011641-\U00011643\U00011660-\U0001166c\U0001173c-\U0001173e\U0001183b\U00011a3f-\U00011a46\U00011a9a-\U00011a9c\U00011a9e-\U00011aa2\U00011c41-\U00011c45\U00011c70-\U00011c71\U00011ef7-\U00011ef8\U00012470-\U00012474\U00016a6e-\U00016a6f\U00016af5\U00016b37-\U00016b3b\U00016b44\U00016e97-\U00016e9a\U0001bc9f\U0001da87-\U0001da8b\U0001e95e-\U0001e95f"
+
+Ps = '(\\[{\u0f3a\u0f3c\u169b\u201a\u201e\u2045\u207d\u208d\u2308\u230a\u2329\u2768\u276a\u276c\u276e\u2770\u2772\u2774\u27c5\u27e6\u27e8\u27ea\u27ec\u27ee\u2983\u2985\u2987\u2989\u298b\u298d\u298f\u2991\u2993\u2995\u2997\u29d8\u29da\u29fc\u2e22\u2e24\u2e26\u2e28\u2e42\u3008\u300a\u300c\u300e\u3010\u3014\u3016\u3018\u301a\u301d\ufd3f\ufe17\ufe35\ufe37\ufe39\ufe3b\ufe3d\ufe3f\ufe41\ufe43\ufe47\ufe59\ufe5b\ufe5d\uff08\uff3b\uff5b\uff5f\uff62'
+
+Sc = '$\xa2-\xa5\u058f\u060b\u07fe-\u07ff\u09f2-\u09f3\u09fb\u0af1\u0bf9\u0e3f\u17db\u20a0-\u20bf\ua838\ufdfc\ufe69\uff04\uffe0-\uffe1\uffe5-\uffe6\U0001ecb0'
+
+Sk = '\\^`\xa8\xaf\xb4\xb8\u02c2-\u02c5\u02d2-\u02df\u02e5-\u02eb\u02ed\u02ef-\u02ff\u0375\u0384-\u0385\u1fbd\u1fbf-\u1fc1\u1fcd-\u1fcf\u1fdd-\u1fdf\u1fed-\u1fef\u1ffd-\u1ffe\u309b-\u309c\ua700-\ua716\ua720-\ua721\ua789-\ua78a\uab5b\ufbb2-\ufbc1\uff3e\uff40\uffe3\U0001f3fb-\U0001f3ff'
+
+Sm = '+<->|~\xac\xb1\xd7\xf7\u03f6\u0606-\u0608\u2044\u2052\u207a-\u207c\u208a-\u208c\u2118\u2140-\u2144\u214b\u2190-\u2194\u219a-\u219b\u21a0\u21a3\u21a6\u21ae\u21ce-\u21cf\u21d2\u21d4\u21f4-\u22ff\u2320-\u2321\u237c\u239b-\u23b3\u23dc-\u23e1\u25b7\u25c1\u25f8-\u25ff\u266f\u27c0-\u27c4\u27c7-\u27e5\u27f0-\u27ff\u2900-\u2982\u2999-\u29d7\u29dc-\u29fb\u29fe-\u2aff\u2b30-\u2b44\u2b47-\u2b4c\ufb29\ufe62\ufe64-\ufe66\uff0b\uff1c-\uff1e\uff5c\uff5e\uffe2\uffe9-\uffec\U0001d6c1\U0001d6db\U0001d6fb\U0001d715\U0001d735\U0001d74f\U0001d76f\U0001d789\U0001d7a9\U0001d7c3\U0001eef0-\U0001eef1'
+
+So = '\xa6\xa9\xae\xb0\u0482\u058d-\u058e\u060e-\u060f\u06de\u06e9\u06fd-\u06fe\u07f6\u09fa\u0b70\u0bf3-\u0bf8\u0bfa\u0c7f\u0d4f\u0d79\u0f01-\u0f03\u0f13\u0f15-\u0f17\u0f1a-\u0f1f\u0f34\u0f36\u0f38\u0fbe-\u0fc5\u0fc7-\u0fcc\u0fce-\u0fcf\u0fd5-\u0fd8\u109e-\u109f\u1390-\u1399\u1940\u19de-\u19ff\u1b61-\u1b6a\u1b74-\u1b7c\u2100-\u2101\u2103-\u2106\u2108-\u2109\u2114\u2116-\u2117\u211e-\u2123\u2125\u2127\u2129\u212e\u213a-\u213b\u214a\u214c-\u214d\u214f\u218a-\u218b\u2195-\u2199\u219c-\u219f\u21a1-\u21a2\u21a4-\u21a5\u21a7-\u21ad\u21af-\u21cd\u21d0-\u21d1\u21d3\u21d5-\u21f3\u2300-\u2307\u230c-\u231f\u2322-\u2328\u232b-\u237b\u237d-\u239a\u23b4-\u23db\u23e2-\u2426\u2440-\u244a\u249c-\u24e9\u2500-\u25b6\u25b8-\u25c0\u25c2-\u25f7\u2600-\u266e\u2670-\u2767\u2794-\u27bf\u2800-\u28ff\u2b00-\u2b2f\u2b45-\u2b46\u2b4d-\u2b73\u2b76-\u2b95\u2b98-\u2bc8\u2bca-\u2bfe\u2ce5-\u2cea\u2e80-\u2e99\u2e9b-\u2ef3\u2f00-\u2fd5\u2ff0-\u2ffb\u3004\u3012-\u3013\u3020\u3036-\u3037\u303e-\u303f\u3190-\u3191\u3196-\u319f\u31c0-\u31e3\u3200-\u321e\u322a-\u3247\u3250\u3260-\u327f\u328a-\u32b0\u32c0-\u32fe\u3300-\u33ff\u4dc0-\u4dff\ua490-\ua4c6\ua828-\ua82b\ua836-\ua837\ua839\uaa77-\uaa79\ufdfd\uffe4\uffe8\uffed-\uffee\ufffc-\ufffd\U00010137-\U0001013f\U00010179-\U00010189\U0001018c-\U0001018e\U00010190-\U0001019b\U000101a0\U000101d0-\U000101fc\U00010877-\U00010878\U00010ac8\U0001173f\U00016b3c-\U00016b3f\U00016b45\U0001bc9c\U0001d000-\U0001d0f5\U0001d100-\U0001d126\U0001d129-\U0001d164\U0001d16a-\U0001d16c\U0001d183-\U0001d184\U0001d18c-\U0001d1a9\U0001d1ae-\U0001d1e8\U0001d200-\U0001d241\U0001d245\U0001d300-\U0001d356\U0001d800-\U0001d9ff\U0001da37-\U0001da3a\U0001da6d-\U0001da74\U0001da76-\U0001da83\U0001da85-\U0001da86\U0001ecac\U0001f000-\U0001f02b\U0001f030-\U0001f093\U0001f0a0-\U0001f0ae\U0001f0b1-\U0001f0bf\U0001f0c1-\U0001f0cf\U0001f0d1-\U0001f0f5\U0001f110-\U0001f16b\U0001f170-\U0001f1ac\U0001f1e6-\U0001f202\U0001f210-\U0001f23b\U0001f240-\U0001f248\U0001f250-\U0001f251\U0001f260-\U0001f265\U0001f300-\U0001f3fa\U0001f400-\U0001f6d4\U0001f6e0-\U0001f6ec\U0001f6f0-\U0001f6f9\U0001f700-\U0001f773\U0001f780-\U0001f7d8\U0001f800-\U0001f80b\U0001f810-\U0001f847\U0001f850-\U0001f859\U0001f860-\U0001f887\U0001f890-\U0001f8ad\U0001f900-\U0001f90b\U0001f910-\U0001f93e\U0001f940-\U0001f970\U0001f973-\U0001f976\U0001f97a\U0001f97c-\U0001f9a2\U0001f9b0-\U0001f9b9\U0001f9c0-\U0001f9c2\U0001f9d0-\U0001f9ff\U0001fa60-\U0001fa6d'
+
+Zl = '\u2028'
+
+Zp = '\u2029'
+
+Zs = ' \xa0\u1680\u2000-\u200a\u202f\u205f\u3000'
+
+xid_continue = 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+
+xid_start = 'A-Z_a-z\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376-\u0377\u037b-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e-\u066f\u0671-\u06d3\u06d5\u06e5-\u06e6\u06ee-\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4-\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f-\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc-\u09dd\u09df-\u09e1\u09f0-\u09f1\u09fc\u0a05-\u0a0a\u0a0f-\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32-\u0a33\u0a35-\u0a36\u0a38-\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2-\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0-\u0ae1\u0af9\u0b05-\u0b0c\u0b0f-\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32-\u0b33\u0b35-\u0b39\u0b3d\u0b5c-\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99-\u0b9a\u0b9c\u0b9e-\u0b9f\u0ba3-\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60-\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0-\u0ce1\u0cf1-\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e40-\u0e46\u0e81-\u0e82\u0e84\u0e87-\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa-\u0eab\u0ead-\u0eb0\u0eb2\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065-\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae-\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5-\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2-\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309d-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a-\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd-\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5-\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40-\ufb41\ufb43-\ufb44\ufb46-\ufbb1\ufbd3-\ufc5d\ufc64-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdf9\ufe71\ufe73\ufe77\ufe79\ufe7b\ufe7d\ufe7f-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uff9d\uffa0-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc\U00010000-\U0001000b\U0001000d-\U00010026\U00010028-\U0001003a\U0001003c-\U0001003d\U0001003f-\U0001004d\U00010050-\U0001005d\U00010080-\U000100fa\U00010140-\U00010174\U00010280-\U0001029c\U000102a0-\U000102d0\U00010300-\U0001031f\U0001032d-\U0001034a\U00010350-\U00010375\U00010380-\U0001039d\U000103a0-\U000103c3\U000103c8-\U000103cf\U000103d1-\U000103d5\U00010400-\U0001049d\U000104b0-\U000104d3\U000104d8-\U000104fb\U00010500-\U00010527\U00010530-\U00010563\U00010600-\U00010736\U00010740-\U00010755\U00010760-\U00010767\U00010800-\U00010805\U00010808\U0001080a-\U00010835\U00010837-\U00010838\U0001083c\U0001083f-\U00010855\U00010860-\U00010876\U00010880-\U0001089e\U000108e0-\U000108f2\U000108f4-\U000108f5\U00010900-\U00010915\U00010920-\U00010939\U00010980-\U000109b7\U000109be-\U000109bf\U00010a00\U00010a10-\U00010a13\U00010a15-\U00010a17\U00010a19-\U00010a35\U00010a60-\U00010a7c\U00010a80-\U00010a9c\U00010ac0-\U00010ac7\U00010ac9-\U00010ae4\U00010b00-\U00010b35\U00010b40-\U00010b55\U00010b60-\U00010b72\U00010b80-\U00010b91\U00010c00-\U00010c48\U00010c80-\U00010cb2\U00010cc0-\U00010cf2\U00010d00-\U00010d23\U00010f00-\U00010f1c\U00010f27\U00010f30-\U00010f45\U00011003-\U00011037\U00011083-\U000110af\U000110d0-\U000110e8\U00011103-\U00011126\U00011144\U00011150-\U00011172\U00011176\U00011183-\U000111b2\U000111c1-\U000111c4\U000111da\U000111dc\U00011200-\U00011211\U00011213-\U0001122b\U00011280-\U00011286\U00011288\U0001128a-\U0001128d\U0001128f-\U0001129d\U0001129f-\U000112a8\U000112b0-\U000112de\U00011305-\U0001130c\U0001130f-\U00011310\U00011313-\U00011328\U0001132a-\U00011330\U00011332-\U00011333\U00011335-\U00011339\U0001133d\U00011350\U0001135d-\U00011361\U00011400-\U00011434\U00011447-\U0001144a\U00011480-\U000114af\U000114c4-\U000114c5\U000114c7\U00011580-\U000115ae\U000115d8-\U000115db\U00011600-\U0001162f\U00011644\U00011680-\U000116aa\U00011700-\U0001171a\U00011800-\U0001182b\U000118a0-\U000118df\U000118ff\U00011a00\U00011a0b-\U00011a32\U00011a3a\U00011a50\U00011a5c-\U00011a83\U00011a86-\U00011a89\U00011a9d\U00011ac0-\U00011af8\U00011c00-\U00011c08\U00011c0a-\U00011c2e\U00011c40\U00011c72-\U00011c8f\U00011d00-\U00011d06\U00011d08-\U00011d09\U00011d0b-\U00011d30\U00011d46\U00011d60-\U00011d65\U00011d67-\U00011d68\U00011d6a-\U00011d89\U00011d98\U00011ee0-\U00011ef2\U00012000-\U00012399\U00012400-\U0001246e\U00012480-\U00012543\U00013000-\U0001342e\U00014400-\U00014646\U00016800-\U00016a38\U00016a40-\U00016a5e\U00016ad0-\U00016aed\U00016b00-\U00016b2f\U00016b40-\U00016b43\U00016b63-\U00016b77\U00016b7d-\U00016b8f\U00016e40-\U00016e7f\U00016f00-\U00016f44\U00016f50\U00016f93-\U00016f9f\U00016fe0-\U00016fe1\U00017000-\U000187f1\U00018800-\U00018af2\U0001b000-\U0001b11e\U0001b170-\U0001b2fb\U0001bc00-\U0001bc6a\U0001bc70-\U0001bc7c\U0001bc80-\U0001bc88\U0001bc90-\U0001bc99\U0001d400-\U0001d454\U0001d456-\U0001d49c\U0001d49e-\U0001d49f\U0001d4a2\U0001d4a5-\U0001d4a6\U0001d4a9-\U0001d4ac\U0001d4ae-\U0001d4b9\U0001d4bb\U0001d4bd-\U0001d4c3\U0001d4c5-\U0001d505\U0001d507-\U0001d50a\U0001d50d-\U0001d514\U0001d516-\U0001d51c\U0001d51e-\U0001d539\U0001d53b-\U0001d53e\U0001d540-\U0001d544\U0001d546\U0001d54a-\U0001d550\U0001d552-\U0001d6a5\U0001d6a8-\U0001d6c0\U0001d6c2-\U0001d6da\U0001d6dc-\U0001d6fa\U0001d6fc-\U0001d714\U0001d716-\U0001d734\U0001d736-\U0001d74e\U0001d750-\U0001d76e\U0001d770-\U0001d788\U0001d78a-\U0001d7a8\U0001d7aa-\U0001d7c2\U0001d7c4-\U0001d7cb\U0001e800-\U0001e8c4\U0001e900-\U0001e943\U0001ee00-\U0001ee03\U0001ee05-\U0001ee1f\U0001ee21-\U0001ee22\U0001ee24\U0001ee27\U0001ee29-\U0001ee32\U0001ee34-\U0001ee37\U0001ee39\U0001ee3b\U0001ee42\U0001ee47\U0001ee49\U0001ee4b\U0001ee4d-\U0001ee4f\U0001ee51-\U0001ee52\U0001ee54\U0001ee57\U0001ee59\U0001ee5b\U0001ee5d\U0001ee5f\U0001ee61-\U0001ee62\U0001ee64\U0001ee67-\U0001ee6a\U0001ee6c-\U0001ee72\U0001ee74-\U0001ee77\U0001ee79-\U0001ee7c\U0001ee7e\U0001ee80-\U0001ee89\U0001ee8b-\U0001ee9b\U0001eea1-\U0001eea3\U0001eea5-\U0001eea9\U0001eeab-\U0001eebb\U00020000-\U0002a6d6\U0002a700-\U0002b734\U0002b740-\U0002b81d\U0002b820-\U0002cea1\U0002ceb0-\U0002ebe0\U0002f800-\U0002fa1d'
+
+cats = ['Cc', 'Cf', 'Cn', 'Co', 'Cs', 'Ll', 'Lm', 'Lo', 'Lt', 'Lu', 'Mc', 'Me', 'Mn', 'Nd', 'Nl', 'No', 'Pc', 'Pd', 'Pe', 'Pf', 'Pi', 'Po', 'Ps', 'Sc', 'Sk', 'Sm', 'So', 'Zl', 'Zp', 'Zs']
+
+# Generated from unidata 11.0.0
+
+def combine(*args):
+    return ''.join(globals()[cat] for cat in args)
+
+
+def allexcept(*args):
+    newcats = cats[:]
+    for arg in args:
+        newcats.remove(arg)
+    return ''.join(globals()[cat] for cat in newcats)
+
+
+def _handle_runs(char_list):  # pragma: no cover
+    buf = []
+    for c in char_list:
+        if len(c) == 1:
+            if buf and buf[-1][1] == chr(ord(c)-1):
+                buf[-1] = (buf[-1][0], c)
+            else:
+                buf.append((c, c))
+        else:
+            buf.append((c, c))
+    for a, b in buf:
+        if a == b:
+            yield a
+        else:
+            yield '%s-%s' % (a, b)
+
+
+if __name__ == '__main__':  # pragma: no cover
+    import unicodedata
+
+    categories = {'xid_start': [], 'xid_continue': []}
+
+    with open(__file__) as fp:
+        content = fp.read()
+
+    header = content[:content.find('Cc =')]
+    footer = content[content.find("def combine("):]
+
+    for code in range(0x110000):
+        c = chr(code)
+        cat = unicodedata.category(c)
+        if ord(c) == 0xdc00:
+            # Hack to avoid combining this combining with the preceding high
+            # surrogate, 0xdbff, when doing a repr.
+            c = '\\' + c
+        elif ord(c) in (0x2d, 0x5b, 0x5c, 0x5d, 0x5e):
+            # Escape regex metachars.
+            c = '\\' + c
+        categories.setdefault(cat, []).append(c)
+        # XID_START and XID_CONTINUE are special categories used for matching
+        # identifiers in Python 3.
+        if c.isidentifier():
+            categories['xid_start'].append(c)
+        if ('a' + c).isidentifier():
+            categories['xid_continue'].append(c)
+
+    with open(__file__, 'w') as fp:
+        fp.write(header)
+
+        for cat in sorted(categories):
+            val = ''.join(_handle_runs(categories[cat]))
+            fp.write('%s = %a\n\n' % (cat, val))
+
+        cats = sorted(categories)
+        cats.remove('xid_start')
+        cats.remove('xid_continue')
+        fp.write('cats = %r\n\n' % cats)
+
+        fp.write('# Generated from unidata %s\n\n' % (unicodedata.unidata_version,))
+
+        fp.write(footer)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pygments/util.py b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/util.py
new file mode 100644
index 0000000..8032962
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pygments/util.py
@@ -0,0 +1,308 @@
+"""
+    pygments.util
+    ~~~~~~~~~~~~~
+
+    Utility functions.
+
+    :copyright: Copyright 2006-2022 by the Pygments team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import re
+from io import TextIOWrapper
+
+
+split_path_re = re.compile(r'[/\\ ]')
+doctype_lookup_re = re.compile(r'''
+    <!DOCTYPE\s+(
+     [a-zA-Z_][a-zA-Z0-9]*
+     (?: \s+      # optional in HTML5
+     [a-zA-Z_][a-zA-Z0-9]*\s+
+     "[^"]*")?
+     )
+     [^>]*>
+''', re.DOTALL | re.MULTILINE | re.VERBOSE)
+tag_re = re.compile(r'<(.+?)(\s.*?)?>.*?</.+?>',
+                    re.IGNORECASE | re.DOTALL | re.MULTILINE)
+xml_decl_re = re.compile(r'\s*<\?xml[^>]*\?>', re.I)
+
+
+class ClassNotFound(ValueError):
+    """Raised if one of the lookup functions didn't find a matching class."""
+
+
+class OptionError(Exception):
+    pass
+
+
+def get_choice_opt(options, optname, allowed, default=None, normcase=False):
+    string = options.get(optname, default)
+    if normcase:
+        string = string.lower()
+    if string not in allowed:
+        raise OptionError('Value for option %s must be one of %s' %
+                          (optname, ', '.join(map(str, allowed))))
+    return string
+
+
+def get_bool_opt(options, optname, default=None):
+    string = options.get(optname, default)
+    if isinstance(string, bool):
+        return string
+    elif isinstance(string, int):
+        return bool(string)
+    elif not isinstance(string, str):
+        raise OptionError('Invalid type %r for option %s; use '
+                          '1/0, yes/no, true/false, on/off' % (
+                              string, optname))
+    elif string.lower() in ('1', 'yes', 'true', 'on'):
+        return True
+    elif string.lower() in ('0', 'no', 'false', 'off'):
+        return False
+    else:
+        raise OptionError('Invalid value %r for option %s; use '
+                          '1/0, yes/no, true/false, on/off' % (
+                              string, optname))
+
+
+def get_int_opt(options, optname, default=None):
+    string = options.get(optname, default)
+    try:
+        return int(string)
+    except TypeError:
+        raise OptionError('Invalid type %r for option %s; you '
+                          'must give an integer value' % (
+                              string, optname))
+    except ValueError:
+        raise OptionError('Invalid value %r for option %s; you '
+                          'must give an integer value' % (
+                              string, optname))
+
+
+def get_list_opt(options, optname, default=None):
+    val = options.get(optname, default)
+    if isinstance(val, str):
+        return val.split()
+    elif isinstance(val, (list, tuple)):
+        return list(val)
+    else:
+        raise OptionError('Invalid type %r for option %s; you '
+                          'must give a list value' % (
+                              val, optname))
+
+
+def docstring_headline(obj):
+    if not obj.__doc__:
+        return ''
+    res = []
+    for line in obj.__doc__.strip().splitlines():
+        if line.strip():
+            res.append(" " + line.strip())
+        else:
+            break
+    return ''.join(res).lstrip()
+
+
+def make_analysator(f):
+    """Return a static text analyser function that returns float values."""
+    def text_analyse(text):
+        try:
+            rv = f(text)
+        except Exception:
+            return 0.0
+        if not rv:
+            return 0.0
+        try:
+            return min(1.0, max(0.0, float(rv)))
+        except (ValueError, TypeError):
+            return 0.0
+    text_analyse.__doc__ = f.__doc__
+    return staticmethod(text_analyse)
+
+
+def shebang_matches(text, regex):
+    r"""Check if the given regular expression matches the last part of the
+    shebang if one exists.
+
+        >>> from pygments.util import shebang_matches
+        >>> shebang_matches('#!/usr/bin/env python', r'python(2\.\d)?')
+        True
+        >>> shebang_matches('#!/usr/bin/python2.4', r'python(2\.\d)?')
+        True
+        >>> shebang_matches('#!/usr/bin/python-ruby', r'python(2\.\d)?')
+        False
+        >>> shebang_matches('#!/usr/bin/python/ruby', r'python(2\.\d)?')
+        False
+        >>> shebang_matches('#!/usr/bin/startsomethingwith python',
+        ...                 r'python(2\.\d)?')
+        True
+
+    It also checks for common windows executable file extensions::
+
+        >>> shebang_matches('#!C:\\Python2.4\\Python.exe', r'python(2\.\d)?')
+        True
+
+    Parameters (``'-f'`` or ``'--foo'`` are ignored so ``'perl'`` does
+    the same as ``'perl -e'``)
+
+    Note that this method automatically searches the whole string (eg:
+    the regular expression is wrapped in ``'^$'``)
+    """
+    index = text.find('\n')
+    if index >= 0:
+        first_line = text[:index].lower()
+    else:
+        first_line = text.lower()
+    if first_line.startswith('#!'):
+        try:
+            found = [x for x in split_path_re.split(first_line[2:].strip())
+                     if x and not x.startswith('-')][-1]
+        except IndexError:
+            return False
+        regex = re.compile(r'^%s(\.(exe|cmd|bat|bin))?$' % regex, re.IGNORECASE)
+        if regex.search(found) is not None:
+            return True
+    return False
+
+
+def doctype_matches(text, regex):
+    """Check if the doctype matches a regular expression (if present).
+
+    Note that this method only checks the first part of a DOCTYPE.
+    eg: 'html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"'
+    """
+    m = doctype_lookup_re.search(text)
+    if m is None:
+        return False
+    doctype = m.group(1)
+    return re.compile(regex, re.I).match(doctype.strip()) is not None
+
+
+def html_doctype_matches(text):
+    """Check if the file looks like it has a html doctype."""
+    return doctype_matches(text, r'html')
+
+
+_looks_like_xml_cache = {}
+
+
+def looks_like_xml(text):
+    """Check if a doctype exists or if we have some tags."""
+    if xml_decl_re.match(text):
+        return True
+    key = hash(text)
+    try:
+        return _looks_like_xml_cache[key]
+    except KeyError:
+        m = doctype_lookup_re.search(text)
+        if m is not None:
+            return True
+        rv = tag_re.search(text[:1000]) is not None
+        _looks_like_xml_cache[key] = rv
+        return rv
+
+
+def surrogatepair(c):
+    """Given a unicode character code with length greater than 16 bits,
+    return the two 16 bit surrogate pair.
+    """
+    # From example D28 of:
+    # http://www.unicode.org/book/ch03.pdf
+    return (0xd7c0 + (c >> 10), (0xdc00 + (c & 0x3ff)))
+
+
+def format_lines(var_name, seq, raw=False, indent_level=0):
+    """Formats a sequence of strings for output."""
+    lines = []
+    base_indent = ' ' * indent_level * 4
+    inner_indent = ' ' * (indent_level + 1) * 4
+    lines.append(base_indent + var_name + ' = (')
+    if raw:
+        # These should be preformatted reprs of, say, tuples.
+        for i in seq:
+            lines.append(inner_indent + i + ',')
+    else:
+        for i in seq:
+            # Force use of single quotes
+            r = repr(i + '"')
+            lines.append(inner_indent + r[:-2] + r[-1] + ',')
+    lines.append(base_indent + ')')
+    return '\n'.join(lines)
+
+
+def duplicates_removed(it, already_seen=()):
+    """
+    Returns a list with duplicates removed from the iterable `it`.
+
+    Order is preserved.
+    """
+    lst = []
+    seen = set()
+    for i in it:
+        if i in seen or i in already_seen:
+            continue
+        lst.append(i)
+        seen.add(i)
+    return lst
+
+
+class Future:
+    """Generic class to defer some work.
+
+    Handled specially in RegexLexerMeta, to support regex string construction at
+    first use.
+    """
+    def get(self):
+        raise NotImplementedError
+
+
+def guess_decode(text):
+    """Decode *text* with guessed encoding.
+
+    First try UTF-8; this should fail for non-UTF-8 encodings.
+    Then try the preferred locale encoding.
+    Fall back to latin-1, which always works.
+    """
+    try:
+        text = text.decode('utf-8')
+        return text, 'utf-8'
+    except UnicodeDecodeError:
+        try:
+            import locale
+            prefencoding = locale.getpreferredencoding()
+            text = text.decode()
+            return text, prefencoding
+        except (UnicodeDecodeError, LookupError):
+            text = text.decode('latin1')
+            return text, 'latin1'
+
+
+def guess_decode_from_terminal(text, term):
+    """Decode *text* coming from terminal *term*.
+
+    First try the terminal encoding, if given.
+    Then try UTF-8.  Then try the preferred locale encoding.
+    Fall back to latin-1, which always works.
+    """
+    if getattr(term, 'encoding', None):
+        try:
+            text = text.decode(term.encoding)
+        except UnicodeDecodeError:
+            pass
+        else:
+            return text, term.encoding
+    return guess_decode(text)
+
+
+def terminal_encoding(term):
+    """Return our best guess of encoding for the given *term*."""
+    if getattr(term, 'encoding', None):
+        return term.encoding
+    import locale
+    return locale.getpreferredencoding()
+
+
+class UnclosingTextIOWrapper(TextIOWrapper):
+    # Don't close underlying buffer on destruction.
+    def close(self):
+        self.flush()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/__init__.py
new file mode 100644
index 0000000..7537250
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/__init__.py
@@ -0,0 +1,331 @@
+# module pyparsing.py
+#
+# Copyright (c) 2003-2022  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = """
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and
+executing simple grammars, vs. the traditional lex/yacc approach, or the
+use of regular expressions.  With pyparsing, you don't need to learn
+a new syntax for defining grammars or matching expressions - the parsing
+module provides a library of classes that you use to construct the
+grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form
+``"<salutation>, <addressee>!"``), built up using :class:`Word`,
+:class:`Literal`, and :class:`And` elements
+(the :meth:`'+'<ParserElement.__add__>` operators create :class:`And` expressions,
+and the strings are auto-converted to :class:`Literal` expressions)::
+
+    from pip._vendor.pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print(hello, "->", greet.parse_string(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the
+self-explanatory class names, and the use of :class:`'+'<And>`,
+:class:`'|'<MatchFirst>`, :class:`'^'<Or>` and :class:`'&'<Each>` operators.
+
+The :class:`ParseResults` object returned from
+:class:`ParserElement.parseString` can be
+accessed as a nested list, a dictionary, or an object with named
+attributes.
+
+The pyparsing module handles some of the problems that are typically
+vexing when writing text parsers:
+
+  - extra or missing whitespace (the above program will also handle
+    "Hello,World!", "Hello  ,  World  !", etc.)
+  - quoted strings
+  - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes :class:`ParserElement` and :class:`ParseResults` to
+see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+
+ - construct literal match expressions from :class:`Literal` and
+   :class:`CaselessLiteral` classes
+ - construct character word-group expressions using the :class:`Word`
+   class
+ - see how to create repetitive expressions using :class:`ZeroOrMore`
+   and :class:`OneOrMore` classes
+ - use :class:`'+'<And>`, :class:`'|'<MatchFirst>`, :class:`'^'<Or>`,
+   and :class:`'&'<Each>` operators to combine simple expressions into
+   more complex ones
+ - associate names with your parsed results using
+   :class:`ParserElement.setResultsName`
+ - access the parsed data, which is returned as a :class:`ParseResults`
+   object
+ - find some helpful expression short-cuts like :class:`delimitedList`
+   and :class:`oneOf`
+ - find more useful common expressions in the :class:`pyparsing_common`
+   namespace class
+"""
+from typing import NamedTuple
+
+
+class version_info(NamedTuple):
+    major: int
+    minor: int
+    micro: int
+    releaselevel: str
+    serial: int
+
+    @property
+    def __version__(self):
+        return (
+            "{}.{}.{}".format(self.major, self.minor, self.micro)
+            + (
+                "{}{}{}".format(
+                    "r" if self.releaselevel[0] == "c" else "",
+                    self.releaselevel[0],
+                    self.serial,
+                ),
+                "",
+            )[self.releaselevel == "final"]
+        )
+
+    def __str__(self):
+        return "{} {} / {}".format(__name__, self.__version__, __version_time__)
+
+    def __repr__(self):
+        return "{}.{}({})".format(
+            __name__,
+            type(self).__name__,
+            ", ".join("{}={!r}".format(*nv) for nv in zip(self._fields, self)),
+        )
+
+
+__version_info__ = version_info(3, 0, 9, "final", 0)
+__version_time__ = "05 May 2022 07:02 UTC"
+__version__ = __version_info__.__version__
+__versionTime__ = __version_time__
+__author__ = "Paul McGuire <ptmcg.gm+pyparsing@gmail.com>"
+
+from .util import *
+from .exceptions import *
+from .actions import *
+from .core import __diag__, __compat__
+from .results import *
+from .core import *
+from .core import _builtin_exprs as core_builtin_exprs
+from .helpers import *
+from .helpers import _builtin_exprs as helper_builtin_exprs
+
+from .unicode import unicode_set, UnicodeRangeList, pyparsing_unicode as unicode
+from .testing import pyparsing_test as testing
+from .common import (
+    pyparsing_common as common,
+    _builtin_exprs as common_builtin_exprs,
+)
+
+# define backward compat synonyms
+if "pyparsing_unicode" not in globals():
+    pyparsing_unicode = unicode
+if "pyparsing_common" not in globals():
+    pyparsing_common = common
+if "pyparsing_test" not in globals():
+    pyparsing_test = testing
+
+core_builtin_exprs += common_builtin_exprs + helper_builtin_exprs
+
+
+__all__ = [
+    "__version__",
+    "__version_time__",
+    "__author__",
+    "__compat__",
+    "__diag__",
+    "And",
+    "AtLineStart",
+    "AtStringStart",
+    "CaselessKeyword",
+    "CaselessLiteral",
+    "CharsNotIn",
+    "Combine",
+    "Dict",
+    "Each",
+    "Empty",
+    "FollowedBy",
+    "Forward",
+    "GoToColumn",
+    "Group",
+    "IndentedBlock",
+    "Keyword",
+    "LineEnd",
+    "LineStart",
+    "Literal",
+    "Located",
+    "PrecededBy",
+    "MatchFirst",
+    "NoMatch",
+    "NotAny",
+    "OneOrMore",
+    "OnlyOnce",
+    "OpAssoc",
+    "Opt",
+    "Optional",
+    "Or",
+    "ParseBaseException",
+    "ParseElementEnhance",
+    "ParseException",
+    "ParseExpression",
+    "ParseFatalException",
+    "ParseResults",
+    "ParseSyntaxException",
+    "ParserElement",
+    "PositionToken",
+    "QuotedString",
+    "RecursiveGrammarException",
+    "Regex",
+    "SkipTo",
+    "StringEnd",
+    "StringStart",
+    "Suppress",
+    "Token",
+    "TokenConverter",
+    "White",
+    "Word",
+    "WordEnd",
+    "WordStart",
+    "ZeroOrMore",
+    "Char",
+    "alphanums",
+    "alphas",
+    "alphas8bit",
+    "any_close_tag",
+    "any_open_tag",
+    "c_style_comment",
+    "col",
+    "common_html_entity",
+    "counted_array",
+    "cpp_style_comment",
+    "dbl_quoted_string",
+    "dbl_slash_comment",
+    "delimited_list",
+    "dict_of",
+    "empty",
+    "hexnums",
+    "html_comment",
+    "identchars",
+    "identbodychars",
+    "java_style_comment",
+    "line",
+    "line_end",
+    "line_start",
+    "lineno",
+    "make_html_tags",
+    "make_xml_tags",
+    "match_only_at_col",
+    "match_previous_expr",
+    "match_previous_literal",
+    "nested_expr",
+    "null_debug_action",
+    "nums",
+    "one_of",
+    "printables",
+    "punc8bit",
+    "python_style_comment",
+    "quoted_string",
+    "remove_quotes",
+    "replace_with",
+    "replace_html_entity",
+    "rest_of_line",
+    "sgl_quoted_string",
+    "srange",
+    "string_end",
+    "string_start",
+    "trace_parse_action",
+    "unicode_string",
+    "with_attribute",
+    "indentedBlock",
+    "original_text_for",
+    "ungroup",
+    "infix_notation",
+    "locatedExpr",
+    "with_class",
+    "CloseMatch",
+    "token_map",
+    "pyparsing_common",
+    "pyparsing_unicode",
+    "unicode_set",
+    "condition_as_parse_action",
+    "pyparsing_test",
+    # pre-PEP8 compatibility names
+    "__versionTime__",
+    "anyCloseTag",
+    "anyOpenTag",
+    "cStyleComment",
+    "commonHTMLEntity",
+    "countedArray",
+    "cppStyleComment",
+    "dblQuotedString",
+    "dblSlashComment",
+    "delimitedList",
+    "dictOf",
+    "htmlComment",
+    "javaStyleComment",
+    "lineEnd",
+    "lineStart",
+    "makeHTMLTags",
+    "makeXMLTags",
+    "matchOnlyAtCol",
+    "matchPreviousExpr",
+    "matchPreviousLiteral",
+    "nestedExpr",
+    "nullDebugAction",
+    "oneOf",
+    "opAssoc",
+    "pythonStyleComment",
+    "quotedString",
+    "removeQuotes",
+    "replaceHTMLEntity",
+    "replaceWith",
+    "restOfLine",
+    "sglQuotedString",
+    "stringEnd",
+    "stringStart",
+    "traceParseAction",
+    "unicodeString",
+    "withAttribute",
+    "indentedBlock",
+    "originalTextFor",
+    "infixNotation",
+    "locatedExpr",
+    "withClass",
+    "tokenMap",
+    "conditionAsParseAction",
+    "autoname_elements",
+]
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/actions.py
@@ -0,0 +1,207 @@
+# actions.py
+
+from .exceptions import ParseException
+from .util import col
+
+
+class OnlyOnce:
+    """
+    Wrapper for parse actions, to ensure they are only called once.
+    """
+
+    def __init__(self, method_call):
+        from .core import _trim_arity
+
+        self.callable = _trim_arity(method_call)
+        self.called = False
+
+    def __call__(self, s, l, t):
+        if not self.called:
+            results = self.callable(s, l, t)
+            self.called = True
+            return results
+        raise ParseException(s, l, "OnlyOnce obj called multiple times w/out reset")
+
+    def reset(self):
+        """
+        Allow the associated parse action to be called once more.
+        """
+
+        self.called = False
+
+
+def match_only_at_col(n):
+    """
+    Helper method for defining parse actions that require matching at
+    a specific column in the input text.
+    """
+
+    def verify_col(strg, locn, toks):
+        if col(locn, strg) != n:
+            raise ParseException(strg, locn, "matched token not at column {}".format(n))
+
+    return verify_col
+
+
+def replace_with(repl_str):
+    """
+    Helper method for common parse actions that simply return
+    a literal value.  Especially useful when used with
+    :class:`transform_string<ParserElement.transform_string>` ().
+
+    Example::
+
+        num = Word(nums).set_parse_action(lambda toks: int(toks[0]))
+        na = one_of("N/A NA").set_parse_action(replace_with(math.nan))
+        term = na | num
+
+        term[1, ...].parse_string("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s, l, t: [repl_str]
+
+
+def remove_quotes(s, l, t):
+    """
+    Helper parse action for removing quotation marks from parsed
+    quoted strings.
+
+    Example::
+
+        # by default, quotation marks are included in parsed results
+        quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use remove_quotes to strip quotation marks from parsed results
+        quoted_string.set_parse_action(remove_quotes)
+        quoted_string.parse_string("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+
+def with_attribute(*args, **attr_dict):
+    """
+    Helper to create a validating parse action to be used with start
+    tags created with :class:`make_xml_tags` or
+    :class:`make_html_tags`. Use ``with_attribute`` to qualify
+    a starting tag with a required attribute value, to avoid false
+    matches on common tags such as ``<TD>`` or ``<DIV>``.
+
+    Call ``with_attribute`` with a series of attribute names and
+    values. Specify the list of filter attributes names and values as:
+
+    - keyword arguments, as in ``(align="right")``, or
+    - as an explicit dict with ``**`` operator, when an attribute
+      name is also a Python reserved word, as in ``**{"class":"Customer", "align":"right"}``
+    - a list of name-value tuples, as in ``(("ns1:class", "Customer"), ("ns2:align", "right"))``
+
+    For attribute names with a namespace prefix, you must use the second
+    form.  Attribute names are matched insensitive to upper/lower case.
+
+    If just testing for ``class`` (with or without a namespace), use
+    :class:`with_class`.
+
+    To verify that the attribute exists, but without specifying a value,
+    pass ``with_attribute.ANY_VALUE`` as the value.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+
+        '''
+        div,div_end = make_html_tags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().set_parse_action(with_attribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.search_string(html):
+            print(grid_header.body)
+
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().set_parse_action(with_attribute(type=with_attribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.search_string(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attr_dict.items()
+    attrs = [(k, v) for k, v in attrs]
+
+    def pa(s, l, tokens):
+        for attrName, attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s, l, "no matching attribute " + attrName)
+            if attrValue != with_attribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(
+                    s,
+                    l,
+                    "attribute {!r} has value {!r}, must be {!r}".format(
+                        attrName, tokens[attrName], attrValue
+                    ),
+                )
+
+    return pa
+
+
+with_attribute.ANY_VALUE = object()
+
+
+def with_class(classname, namespace=""):
+    """
+    Simplified version of :class:`with_attribute` when
+    matching on a div class - made difficult because ``class`` is
+    a reserved word in Python.
+
+    Example::
+
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+
+        '''
+        div,div_end = make_html_tags("div")
+        div_grid = div().set_parse_action(with_class("grid"))
+
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.search_string(html):
+            print(grid_header.body)
+
+        div_any_type = div().set_parse_action(with_class(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.search_string(html):
+            print(div_header.body)
+
+    prints::
+
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "{}:class".format(namespace) if namespace else "class"
+    return with_attribute(**{classattr: classname})
+
+
+# pre-PEP8 compatibility symbols
+replaceWith = replace_with
+removeQuotes = remove_quotes
+withAttribute = with_attribute
+withClass = with_class
+matchOnlyAtCol = match_only_at_col
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/common.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/common.py
new file mode 100644
index 0000000..1859fb7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/common.py
@@ -0,0 +1,424 @@
+# common.py
+from .core import *
+from .helpers import delimited_list, any_open_tag, any_close_tag
+from datetime import datetime
+
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """Here are some common low-level expressions that may be useful in
+    jump-starting parser development:
+
+    - numeric forms (:class:`integers<integer>`, :class:`reals<real>`,
+      :class:`scientific notation<sci_real>`)
+    - common :class:`programming identifiers<identifier>`
+    - network addresses (:class:`MAC<mac_address>`,
+      :class:`IPv4<ipv4_address>`, :class:`IPv6<ipv6_address>`)
+    - ISO8601 :class:`dates<iso8601_date>` and
+      :class:`datetime<iso8601_datetime>`
+    - :class:`UUID<uuid>`
+    - :class:`comma-separated list<comma_separated_list>`
+    - :class:`url`
+
+    Parse actions:
+
+    - :class:`convertToInteger`
+    - :class:`convertToFloat`
+    - :class:`convertToDate`
+    - :class:`convertToDatetime`
+    - :class:`stripHTMLTags`
+    - :class:`upcaseTokens`
+    - :class:`downcaseTokens`
+
+    Example::
+
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+
+    prints::
+
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convert_to_integer = token_map(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convert_to_float = token_map(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).set_name("integer").set_parse_action(convert_to_integer)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = (
+        Word(hexnums).set_name("hex integer").set_parse_action(token_map(int, 16))
+    )
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = (
+        Regex(r"[+-]?\d+")
+        .set_name("signed integer")
+        .set_parse_action(convert_to_integer)
+    )
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (
+        signed_integer().set_parse_action(convert_to_float)
+        + "/"
+        + signed_integer().set_parse_action(convert_to_float)
+    ).set_name("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.add_parse_action(lambda tt: tt[0] / tt[-1])
+
+    mixed_integer = (
+        fraction | signed_integer + Opt(Opt("-").suppress() + fraction)
+    ).set_name("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.add_parse_action(sum)
+
+    real = (
+        Regex(r"[+-]?(?:\d+\.\d*|\.\d+)")
+        .set_name("real number")
+        .set_parse_action(convert_to_float)
+    )
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = (
+        Regex(r"[+-]?(?:\d+(?:[eE][+-]?\d+)|(?:\d+\.\d*|\.\d+)(?:[eE][+-]?\d+)?)")
+        .set_name("real number with scientific notation")
+        .set_parse_action(convert_to_float)
+    )
+    """expression that parses a floating point number with optional
+    scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).setName("number").streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = (
+        Regex(r"[+-]?\d+\.?\d*([eE][+-]?\d+)?")
+        .set_name("fnumber")
+        .set_parse_action(convert_to_float)
+    )
+    """any int or real number, returned as float"""
+
+    identifier = Word(identchars, identbodychars).set_name("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+
+    ipv4_address = Regex(
+        r"(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}"
+    ).set_name("IPv4 address")
+    "IPv4 address (``0.0.0.0 - 255.255.255.255``)"
+
+    _ipv6_part = Regex(r"[0-9a-fA-F]{1,4}").set_name("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (":" + _ipv6_part) * 7).set_name(
+        "full IPv6 address"
+    )
+    _short_ipv6_address = (
+        Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6))
+        + "::"
+        + Opt(_ipv6_part + (":" + _ipv6_part) * (0, 6))
+    ).set_name("short IPv6 address")
+    _short_ipv6_address.add_condition(
+        lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8
+    )
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).set_name("mixed IPv6 address")
+    ipv6_address = Combine(
+        (_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).set_name(
+            "IPv6 address"
+        )
+    ).set_name("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+
+    mac_address = Regex(
+        r"[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}"
+    ).set_name("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convert_to_date(fmt: str = "%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+        - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%d"``)
+
+        Example::
+
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+
+        prints::
+
+            [datetime.date(1999, 12, 31)]
+        """
+
+        def cvt_fn(ss, ll, tt):
+            try:
+                return datetime.strptime(tt[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(ss, ll, str(ve))
+
+        return cvt_fn
+
+    @staticmethod
+    def convert_to_datetime(fmt: str = "%Y-%m-%dT%H:%M:%S.%f"):
+        """Helper to create a parse action for converting parsed
+        datetime string to Python datetime.datetime
+
+        Params -
+        - fmt - format to be passed to datetime.strptime (default= ``"%Y-%m-%dT%H:%M:%S.%f"``)
+
+        Example::
+
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+
+        prints::
+
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+
+        def cvt_fn(s, l, t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+
+        return cvt_fn
+
+    iso8601_date = Regex(
+        r"(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?"
+    ).set_name("ISO8601 date")
+    "ISO8601 date (``yyyy-mm-dd``)"
+
+    iso8601_datetime = Regex(
+        r"(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?"
+    ).set_name("ISO8601 datetime")
+    "ISO8601 datetime (``yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)``) - trailing seconds, milliseconds, and timezone optional; accepts separating ``'T'`` or ``' '``"
+
+    uuid = Regex(r"[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}").set_name("UUID")
+    "UUID (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``)"
+
+    _html_stripper = any_open_tag.suppress() | any_close_tag.suppress()
+
+    @staticmethod
+    def strip_html_tags(s: str, l: int, tokens: ParseResults):
+        """Parse action to remove HTML tags from web page HTML source
+
+        Example::
+
+            # strip HTML links from normal text
+            text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+            td, td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            print(table_text.parseString(text).body)
+
+        Prints::
+
+            More info at the pyparsing wiki page
+        """
+        return pyparsing_common._html_stripper.transform_string(tokens[0])
+
+    _commasepitem = (
+        Combine(
+            OneOrMore(
+                ~Literal(",")
+                + ~LineEnd()
+                + Word(printables, exclude_chars=",")
+                + Opt(White(" \t") + ~FollowedBy(LineEnd() | ","))
+            )
+        )
+        .streamline()
+        .set_name("commaItem")
+    )
+    comma_separated_list = delimited_list(
+        Opt(quoted_string.copy() | _commasepitem, default="")
+    ).set_name("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcase_tokens = staticmethod(token_map(lambda t: t.upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcase_tokens = staticmethod(token_map(lambda t: t.lower()))
+    """Parse action to convert tokens to lower case."""
+
+    # fmt: off
+    url = Regex(
+        # https://mathiasbynens.be/demo/url-regex
+        # https://gist.github.com/dperini/729294
+        r"^" +
+        # protocol identifier (optional)
+        # short syntax // still required
+        r"(?:(?:(?P<scheme>https?|ftp):)?\/\/)" +
+        # user:pass BasicAuth (optional)
+        r"(?:(?P<auth>\S+(?::\S*)?)@)?" +
+        r"(?P<host>" +
+        # IP address exclusion
+        # private & local networks
+        r"(?!(?:10|127)(?:\.\d{1,3}){3})" +
+        r"(?!(?:169\.254|192\.168)(?:\.\d{1,3}){2})" +
+        r"(?!172\.(?:1[6-9]|2\d|3[0-1])(?:\.\d{1,3}){2})" +
+        # IP address dotted notation octets
+        # excludes loopback network 0.0.0.0
+        # excludes reserved space >= 224.0.0.0
+        # excludes network & broadcast addresses
+        # (first & last IP address of each class)
+        r"(?:[1-9]\d?|1\d\d|2[01]\d|22[0-3])" +
+        r"(?:\.(?:1?\d{1,2}|2[0-4]\d|25[0-5])){2}" +
+        r"(?:\.(?:[1-9]\d?|1\d\d|2[0-4]\d|25[0-4]))" +
+        r"|" +
+        # host & domain names, may end with dot
+        # can be replaced by a shortest alternative
+        # (?![-_])(?:[-\w\u00a1-\uffff]{0,63}[^-_]\.)+
+        r"(?:" +
+        r"(?:" +
+        r"[a-z0-9\u00a1-\uffff]" +
+        r"[a-z0-9\u00a1-\uffff_-]{0,62}" +
+        r")?" +
+        r"[a-z0-9\u00a1-\uffff]\." +
+        r")+" +
+        # TLD identifier name, may end with dot
+        r"(?:[a-z\u00a1-\uffff]{2,}\.?)" +
+        r")" +
+        # port number (optional)
+        r"(:(?P<port>\d{2,5}))?" +
+        # resource path (optional)
+        r"(?P<path>\/[^?# ]*)?" +
+        # query string (optional)
+        r"(\?(?P<query>[^#]*))?" +
+        # fragment (optional)
+        r"(#(?P<fragment>\S*))?" +
+        r"$"
+    ).set_name("url")
+    # fmt: on
+
+    # pre-PEP8 compatibility names
+    convertToInteger = convert_to_integer
+    convertToFloat = convert_to_float
+    convertToDate = convert_to_date
+    convertToDatetime = convert_to_datetime
+    stripHTMLTags = strip_html_tags
+    upcaseTokens = upcase_tokens
+    downcaseTokens = downcase_tokens
+
+
+_builtin_exprs = [
+    v for v in vars(pyparsing_common).values() if isinstance(v, ParserElement)
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/core.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/core.py
new file mode 100644
index 0000000..6ff3c76
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/core.py
@@ -0,0 +1,5814 @@
+#
+# core.py
+#
+import os
+import typing
+from typing import (
+    NamedTuple,
+    Union,
+    Callable,
+    Any,
+    Generator,
+    Tuple,
+    List,
+    TextIO,
+    Set,
+    Sequence,
+)
+from abc import ABC, abstractmethod
+from enum import Enum
+import string
+import copy
+import warnings
+import re
+import sys
+from collections.abc import Iterable
+import traceback
+import types
+from operator import itemgetter
+from functools import wraps
+from threading import RLock
+from pathlib import Path
+
+from .util import (
+    _FifoCache,
+    _UnboundedCache,
+    __config_flags,
+    _collapse_string_to_ranges,
+    _escape_regex_range_chars,
+    _bslash,
+    _flatten,
+    LRUMemo as _LRUMemo,
+    UnboundedMemo as _UnboundedMemo,
+)
+from .exceptions import *
+from .actions import *
+from .results import ParseResults, _ParseResultsWithOffset
+from .unicode import pyparsing_unicode
+
+_MAX_INT = sys.maxsize
+str_type: Tuple[type, ...] = (str, bytes)
+
+#
+# Copyright (c) 2003-2022  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+
+if sys.version_info >= (3, 8):
+    from functools import cached_property
+else:
+
+    class cached_property:
+        def __init__(self, func):
+            self._func = func
+
+        def __get__(self, instance, owner=None):
+            ret = instance.__dict__[self._func.__name__] = self._func(instance)
+            return ret
+
+
+class __compat__(__config_flags):
+    """
+    A cross-version compatibility configuration for pyparsing features that will be
+    released in a future version. By setting values in this configuration to True,
+    those features can be enabled in prior versions for compatibility development
+    and testing.
+
+    - ``collect_all_And_tokens`` - flag to enable fix for Issue #63 that fixes erroneous grouping
+      of results names when an :class:`And` expression is nested within an :class:`Or` or :class:`MatchFirst`;
+      maintained for compatibility, but setting to ``False`` no longer restores pre-2.3.1
+      behavior
+    """
+
+    _type_desc = "compatibility"
+
+    collect_all_And_tokens = True
+
+    _all_names = [__ for __ in locals() if not __.startswith("_")]
+    _fixed_names = """
+        collect_all_And_tokens
+        """.split()
+
+
+class __diag__(__config_flags):
+    _type_desc = "diagnostic"
+
+    warn_multiple_tokens_in_named_alternation = False
+    warn_ungrouped_named_tokens_in_collection = False
+    warn_name_set_on_empty_Forward = False
+    warn_on_parse_using_empty_Forward = False
+    warn_on_assignment_to_Forward = False
+    warn_on_multiple_string_args_to_oneof = False
+    warn_on_match_first_with_lshift_operator = False
+    enable_debug_on_named_expressions = False
+
+    _all_names = [__ for __ in locals() if not __.startswith("_")]
+    _warning_names = [name for name in _all_names if name.startswith("warn")]
+    _debug_names = [name for name in _all_names if name.startswith("enable_debug")]
+
+    @classmethod
+    def enable_all_warnings(cls) -> None:
+        for name in cls._warning_names:
+            cls.enable(name)
+
+
+class Diagnostics(Enum):
+    """
+    Diagnostic configuration (all default to disabled)
+    - ``warn_multiple_tokens_in_named_alternation`` - flag to enable warnings when a results
+      name is defined on a :class:`MatchFirst` or :class:`Or` expression with one or more :class:`And` subexpressions
+    - ``warn_ungrouped_named_tokens_in_collection`` - flag to enable warnings when a results
+      name is defined on a containing expression with ungrouped subexpressions that also
+      have results names
+    - ``warn_name_set_on_empty_Forward`` - flag to enable warnings when a :class:`Forward` is defined
+      with a results name, but has no contents defined
+    - ``warn_on_parse_using_empty_Forward`` - flag to enable warnings when a :class:`Forward` is
+      defined in a grammar but has never had an expression attached to it
+    - ``warn_on_assignment_to_Forward`` - flag to enable warnings when a :class:`Forward` is defined
+      but is overwritten by assigning using ``'='`` instead of ``'<<='`` or ``'<<'``
+    - ``warn_on_multiple_string_args_to_oneof`` - flag to enable warnings when :class:`one_of` is
+      incorrectly called with multiple str arguments
+    - ``enable_debug_on_named_expressions`` - flag to auto-enable debug on all subsequent
+      calls to :class:`ParserElement.set_name`
+
+    Diagnostics are enabled/disabled by calling :class:`enable_diag` and :class:`disable_diag`.
+    All warnings can be enabled by calling :class:`enable_all_warnings`.
+    """
+
+    warn_multiple_tokens_in_named_alternation = 0
+    warn_ungrouped_named_tokens_in_collection = 1
+    warn_name_set_on_empty_Forward = 2
+    warn_on_parse_using_empty_Forward = 3
+    warn_on_assignment_to_Forward = 4
+    warn_on_multiple_string_args_to_oneof = 5
+    warn_on_match_first_with_lshift_operator = 6
+    enable_debug_on_named_expressions = 7
+
+
+def enable_diag(diag_enum: Diagnostics) -> None:
+    """
+    Enable a global pyparsing diagnostic flag (see :class:`Diagnostics`).
+    """
+    __diag__.enable(diag_enum.name)
+
+
+def disable_diag(diag_enum: Diagnostics) -> None:
+    """
+    Disable a global pyparsing diagnostic flag (see :class:`Diagnostics`).
+    """
+    __diag__.disable(diag_enum.name)
+
+
+def enable_all_warnings() -> None:
+    """
+    Enable all global pyparsing diagnostic warnings (see :class:`Diagnostics`).
+    """
+    __diag__.enable_all_warnings()
+
+
+# hide abstract class
+del __config_flags
+
+
+def _should_enable_warnings(
+    cmd_line_warn_options: typing.Iterable[str], warn_env_var: typing.Optional[str]
+) -> bool:
+    enable = bool(warn_env_var)
+    for warn_opt in cmd_line_warn_options:
+        w_action, w_message, w_category, w_module, w_line = (warn_opt + "::::").split(
+            ":"
+        )[:5]
+        if not w_action.lower().startswith("i") and (
+            not (w_message or w_category or w_module) or w_module == "pyparsing"
+        ):
+            enable = True
+        elif w_action.lower().startswith("i") and w_module in ("pyparsing", ""):
+            enable = False
+    return enable
+
+
+if _should_enable_warnings(
+    sys.warnoptions, os.environ.get("PYPARSINGENABLEALLWARNINGS")
+):
+    enable_all_warnings()
+
+
+# build list of single arg builtins, that can be used as parse actions
+_single_arg_builtins = {
+    sum,
+    len,
+    sorted,
+    reversed,
+    list,
+    tuple,
+    set,
+    any,
+    all,
+    min,
+    max,
+}
+
+_generatorType = types.GeneratorType
+ParseAction = Union[
+    Callable[[], Any],
+    Callable[[ParseResults], Any],
+    Callable[[int, ParseResults], Any],
+    Callable[[str, int, ParseResults], Any],
+]
+ParseCondition = Union[
+    Callable[[], bool],
+    Callable[[ParseResults], bool],
+    Callable[[int, ParseResults], bool],
+    Callable[[str, int, ParseResults], bool],
+]
+ParseFailAction = Callable[[str, int, "ParserElement", Exception], None]
+DebugStartAction = Callable[[str, int, "ParserElement", bool], None]
+DebugSuccessAction = Callable[
+    [str, int, int, "ParserElement", ParseResults, bool], None
+]
+DebugExceptionAction = Callable[[str, int, "ParserElement", Exception, bool], None]
+
+
+alphas = string.ascii_uppercase + string.ascii_lowercase
+identchars = pyparsing_unicode.Latin1.identchars
+identbodychars = pyparsing_unicode.Latin1.identbodychars
+nums = "0123456789"
+hexnums = nums + "ABCDEFabcdef"
+alphanums = alphas + nums
+printables = "".join([c for c in string.printable if c not in string.whitespace])
+
+_trim_arity_call_line: traceback.StackSummary = None
+
+
+def _trim_arity(func, max_limit=3):
+    """decorator to trim function calls to match the arity of the target"""
+    global _trim_arity_call_line
+
+    if func in _single_arg_builtins:
+        return lambda s, l, t: func(t)
+
+    limit = 0
+    found_arity = False
+
+    def extract_tb(tb, limit=0):
+        frames = traceback.extract_tb(tb, limit=limit)
+        frame_summary = frames[-1]
+        return [frame_summary[:2]]
+
+    # synthesize what would be returned by traceback.extract_stack at the call to
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+
+    # fmt: off
+    LINE_DIFF = 7
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    _trim_arity_call_line = (_trim_arity_call_line or traceback.extract_stack(limit=2)[-1])
+    pa_call_line_synth = (_trim_arity_call_line[0], _trim_arity_call_line[1] + LINE_DIFF)
+
+    def wrapper(*args):
+        nonlocal found_arity, limit
+        while 1:
+            try:
+                ret = func(*args[limit:])
+                found_arity = True
+                return ret
+            except TypeError as te:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if found_arity:
+                    raise
+                else:
+                    tb = te.__traceback__
+                    trim_arity_type_error = (
+                        extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth
+                    )
+                    del tb
+
+                    if trim_arity_type_error:
+                        if limit < max_limit:
+                            limit += 1
+                            continue
+
+                    raise
+    # fmt: on
+
+    # copy func name to wrapper for sensible debug output
+    # (can't use functools.wraps, since that messes with function signature)
+    func_name = getattr(func, "__name__", getattr(func, "__class__").__name__)
+    wrapper.__name__ = func_name
+    wrapper.__doc__ = func.__doc__
+
+    return wrapper
+
+
+def condition_as_parse_action(
+    fn: ParseCondition, message: str = None, fatal: bool = False
+) -> ParseAction:
+    """
+    Function to convert a simple predicate function that returns ``True`` or ``False``
+    into a parse action. Can be used in places when a parse action is required
+    and :class:`ParserElement.add_condition` cannot be used (such as when adding a condition
+    to an operator level in :class:`infix_notation`).
+
+    Optional keyword arguments:
+
+    - ``message`` - define a custom message to be used in the raised exception
+    - ``fatal`` - if True, will raise :class:`ParseFatalException` to stop parsing immediately;
+      otherwise will raise :class:`ParseException`
+
+    """
+    msg = message if message is not None else "failed user-defined condition"
+    exc_type = ParseFatalException if fatal else ParseException
+    fn = _trim_arity(fn)
+
+    @wraps(fn)
+    def pa(s, l, t):
+        if not bool(fn(s, l, t)):
+            raise exc_type(s, l, msg)
+
+    return pa
+
+
+def _default_start_debug_action(
+    instring: str, loc: int, expr: "ParserElement", cache_hit: bool = False
+):
+    cache_hit_str = "*" if cache_hit else ""
+    print(
+        (
+            "{}Match {} at loc {}({},{})\n  {}\n  {}^".format(
+                cache_hit_str,
+                expr,
+                loc,
+                lineno(loc, instring),
+                col(loc, instring),
+                line(loc, instring),
+                " " * (col(loc, instring) - 1),
+            )
+        )
+    )
+
+
+def _default_success_debug_action(
+    instring: str,
+    startloc: int,
+    endloc: int,
+    expr: "ParserElement",
+    toks: ParseResults,
+    cache_hit: bool = False,
+):
+    cache_hit_str = "*" if cache_hit else ""
+    print("{}Matched {} -> {}".format(cache_hit_str, expr, toks.as_list()))
+
+
+def _default_exception_debug_action(
+    instring: str,
+    loc: int,
+    expr: "ParserElement",
+    exc: Exception,
+    cache_hit: bool = False,
+):
+    cache_hit_str = "*" if cache_hit else ""
+    print(
+        "{}Match {} failed, {} raised: {}".format(
+            cache_hit_str, expr, type(exc).__name__, exc
+        )
+    )
+
+
+def null_debug_action(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+
+
+class ParserElement(ABC):
+    """Abstract base level parser element class."""
+
+    DEFAULT_WHITE_CHARS: str = " \n\t\r"
+    verbose_stacktrace: bool = False
+    _literalStringClass: typing.Optional[type] = None
+
+    @staticmethod
+    def set_default_whitespace_chars(chars: str) -> None:
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+
+            # default whitespace chars are space, <TAB> and newline
+            Word(alphas)[1, ...].parse_string("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+
+            # change to just treat newline as significant
+            ParserElement.set_default_whitespace_chars(" \t")
+            Word(alphas)[1, ...].parse_string("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+        # update whitespace all parse expressions defined in this module
+        for expr in _builtin_exprs:
+            if expr.copyDefaultWhiteChars:
+                expr.whiteChars = set(chars)
+
+    @staticmethod
+    def inline_literals_using(cls: type) -> None:
+        """
+        Set class to be used for inclusion of string literals into a parser.
+
+        Example::
+
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parse_string("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inline_literals_using(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            date_str.parse_string("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    class DebugActions(NamedTuple):
+        debug_try: typing.Optional[DebugStartAction]
+        debug_match: typing.Optional[DebugSuccessAction]
+        debug_fail: typing.Optional[DebugExceptionAction]
+
+    def __init__(self, savelist: bool = False):
+        self.parseAction: List[ParseAction] = list()
+        self.failAction: typing.Optional[ParseFailAction] = None
+        self.customName = None
+        self._defaultName = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS)
+        self.copyDefaultWhiteChars = True
+        # used when checking for left-recursion
+        self.mayReturnEmpty = False
+        self.keepTabs = False
+        self.ignoreExprs: List["ParserElement"] = list()
+        self.debug = False
+        self.streamlined = False
+        # optimize exception handling for subclasses that don't advance parse index
+        self.mayIndexError = True
+        self.errmsg = ""
+        # mark results names as modal (report only last) or cumulative (list all)
+        self.modalResults = True
+        # custom debug actions
+        self.debugActions = self.DebugActions(None, None, None)
+        # avoid redundant calls to preParse
+        self.callPreparse = True
+        self.callDuringTry = False
+        self.suppress_warnings_: List[Diagnostics] = []
+
+    def suppress_warning(self, warning_type: Diagnostics) -> "ParserElement":
+        """
+        Suppress warnings emitted for a particular diagnostic on this expression.
+
+        Example::
+
+            base = pp.Forward()
+            base.suppress_warning(Diagnostics.warn_on_parse_using_empty_Forward)
+
+            # statement would normally raise a warning, but is now suppressed
+            print(base.parseString("x"))
+
+        """
+        self.suppress_warnings_.append(warning_type)
+        return self
+
+    def copy(self) -> "ParserElement":
+        """
+        Make a copy of this :class:`ParserElement`.  Useful for defining
+        different parse actions for the same parsing pattern, using copies of
+        the original parse element.
+
+        Example::
+
+            integer = Word(nums).set_parse_action(lambda toks: int(toks[0]))
+            integerK = integer.copy().add_parse_action(lambda toks: toks[0] * 1024) + Suppress("K")
+            integerM = integer.copy().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
+
+            print((integerK | integerM | integer)[1, ...].parse_string("5K 100 640K 256M"))
+
+        prints::
+
+            [5120, 100, 655360, 268435456]
+
+        Equivalent form of ``expr.copy()`` is just ``expr()``::
+
+            integerM = integer().add_parse_action(lambda toks: toks[0] * 1024 * 1024) + Suppress("M")
+        """
+        cpy = copy.copy(self)
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = set(ParserElement.DEFAULT_WHITE_CHARS)
+        return cpy
+
+    def set_results_name(
+        self, name: str, list_all_matches: bool = False, *, listAllMatches: bool = False
+    ) -> "ParserElement":
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+
+        Normally, results names are assigned as you would assign keys in a dict:
+        any existing value is overwritten by later values. If it is necessary to
+        keep all values captured for a particular results name, call ``set_results_name``
+        with ``list_all_matches`` = True.
+
+        NOTE: ``set_results_name`` returns a *copy* of the original :class:`ParserElement` object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        ``expr("name")`` in place of ``expr.set_results_name("name")``
+        - see :class:`__call__`. If ``list_all_matches`` is required, use
+        ``expr("name*")``.
+
+        Example::
+
+            date_str = (integer.set_results_name("year") + '/'
+                        + integer.set_results_name("month") + '/'
+                        + integer.set_results_name("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        listAllMatches = listAllMatches or list_all_matches
+        return self._setResultsName(name, listAllMatches)
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if name is None:
+            return self
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches = True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def set_break(self, break_flag: bool = True) -> "ParserElement":
+        """
+        Method to invoke the Python pdb debugger when this element is
+        about to be parsed. Set ``break_flag`` to ``True`` to enable, ``False`` to
+        disable.
+        """
+        if break_flag:
+            _parseMethod = self._parse
+
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+
+                # this call to pdb.set_trace() is intentional, not a checkin error
+                pdb.set_trace()
+                return _parseMethod(instring, loc, doActions, callPreParse)
+
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse, "_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def set_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement":
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+
+        Parse actions can be called to perform data conversions, do extra validation,
+        update external data structures, or enhance or replace the parsed tokens.
+        Each parse action ``fn`` is a callable method with 0-3 arguments, called as
+        ``fn(s, loc, toks)`` , ``fn(loc, toks)`` , ``fn(toks)`` , or just ``fn()`` , where:
+
+        - s   = the original string being parsed (see note below)
+        - loc = the location of the matching substring
+        - toks = a list of the matched tokens, packaged as a :class:`ParseResults` object
+
+        The parsed tokens are passed to the parse action as ParseResults. They can be
+        modified in place using list-style append, extend, and pop operations to update
+        the parsed list elements; and with dictionary-style item set and del operations
+        to add, update, or remove any named results. If the tokens are modified in place,
+        it is not necessary to return them with a return statement.
+
+        Parse actions can also completely replace the given tokens, with another ``ParseResults``
+        object, or with some entirely different object (common for parse actions that perform data
+        conversions). A convenient way to build a new parse result is to define the values
+        using a dict, and then create the return value using :class:`ParseResults.from_dict`.
+
+        If None is passed as the ``fn`` parse action, all previously added parse actions for this
+        expression are cleared.
+
+        Optional keyword arguments:
+
+        - call_during_try = (default= ``False``) indicate if parse action should be run during
+          lookaheads and alternate testing. For parse actions that have side effects, it is
+          important to only call the parse action once it is determined that it is being
+          called as part of a successful parse. For parse actions that perform additional
+          validation, then call_during_try should be passed as True, so that the validation
+          code is included in the preliminary "try" parses.
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See :class:`parse_string` for more
+        information on parsing strings containing ``<TAB>`` s, and suggested
+        methods to maintain a consistent view of the parsed string, the parse
+        location, and line and column positions within the parsed string.
+
+        Example::
+
+            # parse dates in the form YYYY/MM/DD
+
+            # use parse action to convert toks from str to int at parse time
+            def convert_to_int(toks):
+                return int(toks[0])
+
+            # use a parse action to verify that the date is a valid date
+            def is_valid_date(instring, loc, toks):
+                from datetime import date
+                year, month, day = toks[::2]
+                try:
+                    date(year, month, day)
+                except ValueError:
+                    raise ParseException(instring, loc, "invalid date given")
+
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            # add parse actions
+            integer.set_parse_action(convert_to_int)
+            date_str.set_parse_action(is_valid_date)
+
+            # note that integer fields are now ints, not strings
+            date_str.run_tests('''
+                # successful parse - note that integer fields were converted to ints
+                1999/12/31
+
+                # fail - invalid date
+                1999/13/31
+                ''')
+        """
+        if list(fns) == [None]:
+            self.parseAction = []
+        else:
+            if not all(callable(fn) for fn in fns):
+                raise TypeError("parse actions must be callable")
+            self.parseAction = [_trim_arity(fn) for fn in fns]
+            self.callDuringTry = kwargs.get(
+                "call_during_try", kwargs.get("callDuringTry", False)
+            )
+        return self
+
+    def add_parse_action(self, *fns: ParseAction, **kwargs) -> "ParserElement":
+        """
+        Add one or more parse actions to expression's list of parse actions. See :class:`set_parse_action`.
+
+        See examples in :class:`copy`.
+        """
+        self.parseAction += [_trim_arity(fn) for fn in fns]
+        self.callDuringTry = self.callDuringTry or kwargs.get(
+            "call_during_try", kwargs.get("callDuringTry", False)
+        )
+        return self
+
+    def add_condition(self, *fns: ParseCondition, **kwargs) -> "ParserElement":
+        """Add a boolean predicate function to expression's list of parse actions. See
+        :class:`set_parse_action` for function call signatures. Unlike ``set_parse_action``,
+        functions passed to ``add_condition`` need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+
+        - message = define a custom message to be used in the raised exception
+        - fatal = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise
+          ParseException
+        - call_during_try = boolean to indicate if this method should be called during internal tryParse calls,
+          default=False
+
+        Example::
+
+            integer = Word(nums).set_parse_action(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.add_condition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parse_string("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0),
+                                                                         (line:1, col:1)
+        """
+        for fn in fns:
+            self.parseAction.append(
+                condition_as_parse_action(
+                    fn, message=kwargs.get("message"), fatal=kwargs.get("fatal", False)
+                )
+            )
+
+        self.callDuringTry = self.callDuringTry or kwargs.get(
+            "call_during_try", kwargs.get("callDuringTry", False)
+        )
+        return self
+
+    def set_fail_action(self, fn: ParseFailAction) -> "ParserElement":
+        """
+        Define action to perform if parsing fails at this expression.
+        Fail acton fn is a callable function that takes the arguments
+        ``fn(s, loc, expr, err)`` where:
+
+        - s = string being parsed
+        - loc = location where expression match was attempted and failed
+        - expr = the parse expression that failed
+        - err = the exception thrown
+
+        The function returns no value.  It may throw :class:`ParseFatalException`
+        if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables(self, instring, loc):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc, dummy = e._parse(instring, loc)
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse(self, instring, loc):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables(instring, loc)
+
+        if self.skipWhitespace:
+            instrlen = len(instring)
+            white_chars = self.whiteChars
+            while loc < instrlen and instring[loc] in white_chars:
+                loc += 1
+
+        return loc
+
+    def parseImpl(self, instring, loc, doActions=True):
+        return loc, []
+
+    def postParse(self, instring, loc, tokenlist):
+        return tokenlist
+
+    # @profile
+    def _parseNoCache(
+        self, instring, loc, doActions=True, callPreParse=True
+    ) -> Tuple[int, ParseResults]:
+        TRY, MATCH, FAIL = 0, 1, 2
+        debugging = self.debug  # and doActions)
+        len_instring = len(instring)
+
+        if debugging or self.failAction:
+            # print("Match {} at loc {}({}, {})".format(self, loc, lineno(loc, instring), col(loc, instring)))
+            try:
+                if callPreParse and self.callPreparse:
+                    pre_loc = self.preParse(instring, loc)
+                else:
+                    pre_loc = loc
+                tokens_start = pre_loc
+                if self.debugActions.debug_try:
+                    self.debugActions.debug_try(instring, tokens_start, self, False)
+                if self.mayIndexError or pre_loc >= len_instring:
+                    try:
+                        loc, tokens = self.parseImpl(instring, pre_loc, doActions)
+                    except IndexError:
+                        raise ParseException(instring, len_instring, self.errmsg, self)
+                else:
+                    loc, tokens = self.parseImpl(instring, pre_loc, doActions)
+            except Exception as err:
+                # print("Exception raised:", err)
+                if self.debugActions.debug_fail:
+                    self.debugActions.debug_fail(
+                        instring, tokens_start, self, err, False
+                    )
+                if self.failAction:
+                    self.failAction(instring, tokens_start, self, err)
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                pre_loc = self.preParse(instring, loc)
+            else:
+                pre_loc = loc
+            tokens_start = pre_loc
+            if self.mayIndexError or pre_loc >= len_instring:
+                try:
+                    loc, tokens = self.parseImpl(instring, pre_loc, doActions)
+                except IndexError:
+                    raise ParseException(instring, len_instring, self.errmsg, self)
+            else:
+                loc, tokens = self.parseImpl(instring, pre_loc, doActions)
+
+        tokens = self.postParse(instring, loc, tokens)
+
+        ret_tokens = ParseResults(
+            tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults
+        )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        try:
+                            tokens = fn(instring, tokens_start, ret_tokens)
+                        except IndexError as parse_action_exc:
+                            exc = ParseException("exception raised in parse action")
+                            raise exc from parse_action_exc
+
+                        if tokens is not None and tokens is not ret_tokens:
+                            ret_tokens = ParseResults(
+                                tokens,
+                                self.resultsName,
+                                asList=self.saveAsList
+                                and isinstance(tokens, (ParseResults, list)),
+                                modal=self.modalResults,
+                            )
+                except Exception as err:
+                    # print "Exception raised in user parse action:", err
+                    if self.debugActions.debug_fail:
+                        self.debugActions.debug_fail(
+                            instring, tokens_start, self, err, False
+                        )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    try:
+                        tokens = fn(instring, tokens_start, ret_tokens)
+                    except IndexError as parse_action_exc:
+                        exc = ParseException("exception raised in parse action")
+                        raise exc from parse_action_exc
+
+                    if tokens is not None and tokens is not ret_tokens:
+                        ret_tokens = ParseResults(
+                            tokens,
+                            self.resultsName,
+                            asList=self.saveAsList
+                            and isinstance(tokens, (ParseResults, list)),
+                            modal=self.modalResults,
+                        )
+        if debugging:
+            # print("Matched", self, "->", ret_tokens.as_list())
+            if self.debugActions.debug_match:
+                self.debugActions.debug_match(
+                    instring, tokens_start, loc, self, ret_tokens, False
+                )
+
+        return loc, ret_tokens
+
+    def try_parse(self, instring: str, loc: int, raise_fatal: bool = False) -> int:
+        try:
+            return self._parse(instring, loc, doActions=False)[0]
+        except ParseFatalException:
+            if raise_fatal:
+                raise
+            raise ParseException(instring, loc, self.errmsg, self)
+
+    def can_parse_next(self, instring: str, loc: int) -> bool:
+        try:
+            self.try_parse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    # cache for left-recursion in Forward references
+    recursion_lock = RLock()
+    recursion_memos: typing.Dict[
+        Tuple[int, "Forward", bool], Tuple[int, Union[ParseResults, Exception]]
+    ] = {}
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = (
+        {}
+    )  # this is set later by enabled_packrat(); this is here so that reset_cache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache(
+        self, instring, loc, doActions=True, callPreParse=True
+    ) -> Tuple[int, ParseResults]:
+        HIT, MISS = 0, 1
+        TRY, MATCH, FAIL = 0, 1, 2
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy(), loc))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if self.debug and self.debugActions.debug_try:
+                    try:
+                        self.debugActions.debug_try(instring, loc, self, cache_hit=True)
+                    except TypeError:
+                        pass
+                if isinstance(value, Exception):
+                    if self.debug and self.debugActions.debug_fail:
+                        try:
+                            self.debugActions.debug_fail(
+                                instring, loc, self, value, cache_hit=True
+                            )
+                        except TypeError:
+                            pass
+                    raise value
+
+                loc_, result, endloc = value[0], value[1].copy(), value[2]
+                if self.debug and self.debugActions.debug_match:
+                    try:
+                        self.debugActions.debug_match(
+                            instring, loc_, endloc, self, result, cache_hit=True
+                        )
+                    except TypeError:
+                        pass
+
+                return loc_, result
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def reset_cache() -> None:
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(
+            ParserElement.packrat_cache_stats
+        )
+        ParserElement.recursion_memos.clear()
+
+    _packratEnabled = False
+    _left_recursion_enabled = False
+
+    @staticmethod
+    def disable_memoization() -> None:
+        """
+        Disables active Packrat or Left Recursion parsing and their memoization
+
+        This method also works if neither Packrat nor Left Recursion are enabled.
+        This makes it safe to call before activating Packrat nor Left Recursion
+        to clear any previous settings.
+        """
+        ParserElement.reset_cache()
+        ParserElement._left_recursion_enabled = False
+        ParserElement._packratEnabled = False
+        ParserElement._parse = ParserElement._parseNoCache
+
+    @staticmethod
+    def enable_left_recursion(
+        cache_size_limit: typing.Optional[int] = None, *, force=False
+    ) -> None:
+        """
+        Enables "bounded recursion" parsing, which allows for both direct and indirect
+        left-recursion. During parsing, left-recursive :class:`Forward` elements are
+        repeatedly matched with a fixed recursion depth that is gradually increased
+        until finding the longest match.
+
+        Example::
+
+            from pip._vendor import pyparsing as pp
+            pp.ParserElement.enable_left_recursion()
+
+            E = pp.Forward("E")
+            num = pp.Word(pp.nums)
+            # match `num`, or `num '+' num`, or `num '+' num '+' num`, ...
+            E <<= E + '+' - num | num
+
+            print(E.parse_string("1+2+3"))
+
+        Recursion search naturally memoizes matches of ``Forward`` elements and may
+        thus skip reevaluation of parse actions during backtracking. This may break
+        programs with parse actions which rely on strict ordering of side-effects.
+
+        Parameters:
+
+        - cache_size_limit - (default=``None``) - memoize at most this many
+          ``Forward`` elements during matching; if ``None`` (the default),
+          memoize all ``Forward`` elements.
+
+        Bounded Recursion parsing works similar but not identical to Packrat parsing,
+        thus the two cannot be used together. Use ``force=True`` to disable any
+        previous, conflicting settings.
+        """
+        if force:
+            ParserElement.disable_memoization()
+        elif ParserElement._packratEnabled:
+            raise RuntimeError("Packrat and Bounded Recursion are not compatible")
+        if cache_size_limit is None:
+            ParserElement.recursion_memos = _UnboundedMemo()
+        elif cache_size_limit > 0:
+            ParserElement.recursion_memos = _LRUMemo(capacity=cache_size_limit)
+        else:
+            raise NotImplementedError("Memo size of %s" % cache_size_limit)
+        ParserElement._left_recursion_enabled = True
+
+    @staticmethod
+    def enable_packrat(cache_size_limit: int = 128, *, force: bool = False) -> None:
+        """
+        Enables "packrat" parsing, which adds memoizing to the parsing logic.
+        Repeated parse attempts at the same string location (which happens
+        often in many complex grammars) can immediately return a cached value,
+        instead of re-executing parsing/validating code.  Memoizing is done of
+        both valid results and parsing exceptions.
+
+        Parameters:
+
+        - cache_size_limit - (default= ``128``) - if an integer value is provided
+          will limit the size of the packrat cache; if None is passed, then
+          the cache size will be unbounded; if 0 is passed, the cache will
+          be effectively disabled.
+
+        This speedup may break existing programs that use parse actions that
+        have side-effects.  For this reason, packrat parsing is disabled when
+        you first import pyparsing.  To activate the packrat feature, your
+        program must call the class method :class:`ParserElement.enable_packrat`.
+        For best results, call ``enable_packrat()`` immediately after
+        importing pyparsing.
+
+        Example::
+
+            from pip._vendor import pyparsing
+            pyparsing.ParserElement.enable_packrat()
+
+        Packrat parsing works similar but not identical to Bounded Recursion parsing,
+        thus the two cannot be used together. Use ``force=True`` to disable any
+        previous, conflicting settings.
+        """
+        if force:
+            ParserElement.disable_memoization()
+        elif ParserElement._left_recursion_enabled:
+            raise RuntimeError("Packrat and Bounded Recursion are not compatible")
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = _UnboundedCache()
+            else:
+                ParserElement.packrat_cache = _FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parse_string(
+        self, instring: str, parse_all: bool = False, *, parseAll: bool = False
+    ) -> ParseResults:
+        """
+        Parse a string with respect to the parser definition. This function is intended as the primary interface to the
+        client code.
+
+        :param instring: The input string to be parsed.
+        :param parse_all: If set, the entire input string must match the grammar.
+        :param parseAll: retained for pre-PEP8 compatibility, will be removed in a future release.
+        :raises ParseException: Raised if ``parse_all`` is set and the input string does not match the whole grammar.
+        :returns: the parsed data as a :class:`ParseResults` object, which may be accessed as a `list`, a `dict`, or
+          an object with attributes if the given parser includes results names.
+
+        If the input string is required to match the entire grammar, ``parse_all`` flag must be set to ``True``. This
+        is also equivalent to ending the grammar with :class:`StringEnd`().
+
+        To report proper column numbers, ``parse_string`` operates on a copy of the input string where all tabs are
+        converted to spaces (8 spaces per tab, as per the default in ``string.expandtabs``). If the input string
+        contains tabs and the grammar uses parse actions that use the ``loc`` argument to index into the string
+        being parsed, one can ensure a consistent view of the input string by doing one of the following:
+
+        - calling ``parse_with_tabs`` on your grammar before calling ``parse_string`` (see :class:`parse_with_tabs`),
+        - define your parse action using the full ``(s,loc,toks)`` signature, and reference the input string using the
+          parse action's ``s`` argument, or
+        - explicitly expand the tabs in your input string before calling ``parse_string``.
+
+        Examples:
+
+        By default, partial matches are OK.
+
+        >>> res = Word('a').parse_string('aaaaabaaa')
+        >>> print(res)
+        ['aaaaa']
+
+        The parsing behavior varies by the inheriting class of this abstract class. Please refer to the children
+        directly to see more examples.
+
+        It raises an exception if parse_all flag is set and instring does not match the whole grammar.
+
+        >>> res = Word('a').parse_string('aaaaabaaa', parse_all=True)
+        Traceback (most recent call last):
+        ...
+        pyparsing.ParseException: Expected end of text, found 'b'  (at char 5), (line:1, col:6)
+        """
+        parseAll = parse_all or parseAll
+
+        ParserElement.reset_cache()
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse(instring, 0)
+            if parseAll:
+                loc = self.preParse(instring, loc)
+                se = Empty() + StringEnd()
+                se._parse(instring, loc)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clearing out pyparsing internal stack trace
+                raise exc.with_traceback(None)
+        else:
+            return tokens
+
+    def scan_string(
+        self,
+        instring: str,
+        max_matches: int = _MAX_INT,
+        overlap: bool = False,
+        *,
+        debug: bool = False,
+        maxMatches: int = _MAX_INT,
+    ) -> Generator[Tuple[ParseResults, int, int], None, None]:
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        ``max_matches`` argument, to clip scanning after 'n' matches are found.  If
+        ``overlap`` is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See :class:`parse_string` for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens, start, end in Word(alphas).scan_string(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+
+        prints::
+
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        maxMatches = min(maxMatches, max_matches)
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = str(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn(instring, loc)
+                    nextLoc, tokens = parseFn(instring, preloc, callPreParse=False)
+                except ParseException:
+                    loc = preloc + 1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        if debug:
+                            print(
+                                {
+                                    "tokens": tokens.asList(),
+                                    "start": preloc,
+                                    "end": nextLoc,
+                                }
+                            )
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn(instring, loc)
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc + 1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc.with_traceback(None)
+
+    def transform_string(self, instring: str, *, debug: bool = False) -> str:
+        """
+        Extension to :class:`scan_string`, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use ``transform_string``, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking ``transform_string()`` on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  ``transform_string()`` returns the resulting transformed string.
+
+        Example::
+
+            wd = Word(alphas)
+            wd.set_parse_action(lambda toks: toks[0].title())
+
+            print(wd.transform_string("now is the winter of our discontent made glorious summer by this sun of york."))
+
+        prints::
+
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out: List[str] = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transform_string and scan_string
+        self.keepTabs = True
+        try:
+            for t, s, e in self.scan_string(instring, debug=debug):
+                out.append(instring[lastE:s])
+                if t:
+                    if isinstance(t, ParseResults):
+                        out += t.as_list()
+                    elif isinstance(t, Iterable) and not isinstance(t, str_type):
+                        out.extend(t)
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join([str(s) for s in _flatten(out)])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc.with_traceback(None)
+
+    def search_string(
+        self,
+        instring: str,
+        max_matches: int = _MAX_INT,
+        *,
+        debug: bool = False,
+        maxMatches: int = _MAX_INT,
+    ) -> ParseResults:
+        """
+        Another extension to :class:`scan_string`, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        ``max_matches`` argument, to clip searching after 'n' matches are found.
+
+        Example::
+
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+
+            print(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.search_string("More than Iron, more than Lead, more than Gold I need Electricity")))
+
+        prints::
+
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        maxMatches = min(maxMatches, max_matches)
+        try:
+            return ParseResults(
+                [t for t, s, e in self.scan_string(instring, maxMatches, debug=debug)]
+            )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc.with_traceback(None)
+
+    def split(
+        self,
+        instring: str,
+        maxsplit: int = _MAX_INT,
+        include_separators: bool = False,
+        *,
+        includeSeparators=False,
+    ) -> Generator[str, None, None]:
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional ``maxsplit`` argument, to limit the number of splits;
+        and the optional ``include_separators`` argument (default= ``False``), if the separating
+        matching text should be included in the split results.
+
+        Example::
+
+            punc = one_of(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+
+        prints::
+
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        includeSeparators = includeSeparators or include_separators
+        last = 0
+        for t, s, e in self.scan_string(instring, max_matches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other) -> "ParserElement":
+        """
+        Implementation of ``+`` operator - returns :class:`And`. Adding strings to a :class:`ParserElement`
+        converts them to :class:`Literal`s by default.
+
+        Example::
+
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print(hello, "->", greet.parse_string(hello))
+
+        prints::
+
+            Hello, World! -> ['Hello', ',', 'World', '!']
+
+        ``...`` may be used as a parse expression as a short form of :class:`SkipTo`.
+
+            Literal('start') + ... + Literal('end')
+
+        is equivalent to:
+
+            Literal('start') + SkipTo('end')("_skipped*") + Literal('end')
+
+        Note that the skipped text is returned with '_skipped' as a results name,
+        and to support having multiple skips in the same parser, the value returned is
+        a list of all skipped text.
+        """
+        if other is Ellipsis:
+            return _PendingSkip(self)
+
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return And([self, other])
+
+    def __radd__(self, other) -> "ParserElement":
+        """
+        Implementation of ``+`` operator when left operand is not a :class:`ParserElement`
+        """
+        if other is Ellipsis:
+            return SkipTo(self)("_skipped*") + self
+
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return other + self
+
+    def __sub__(self, other) -> "ParserElement":
+        """
+        Implementation of ``-`` operator, returns :class:`And` with error stop
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other) -> "ParserElement":
+        """
+        Implementation of ``-`` operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return other - self
+
+    def __mul__(self, other) -> "ParserElement":
+        """
+        Implementation of ``*`` operator, allows use of ``expr * 3`` in place of
+        ``expr + expr + expr``.  Expressions may also be multiplied by a 2-integer
+        tuple, similar to ``{min, max}`` multipliers in regular expressions.  Tuples
+        may also include ``None`` as in:
+        - ``expr*(n, None)`` or ``expr*(n, )`` is equivalent
+             to ``expr*n + ZeroOrMore(expr)``
+             (read as "at least n instances of ``expr``")
+        - ``expr*(None, n)`` is equivalent to ``expr*(0, n)``
+             (read as "0 to n instances of ``expr``")
+        - ``expr*(None, None)`` is equivalent to ``ZeroOrMore(expr)``
+        - ``expr*(1, None)`` is equivalent to ``OneOrMore(expr)``
+
+        Note that ``expr*(None, n)`` does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        ``expr*(None, n)`` does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        ``expr*(None, n) + ~expr``
+        """
+        if other is Ellipsis:
+            other = (0, None)
+        elif isinstance(other, tuple) and other[:1] == (Ellipsis,):
+            other = ((0,) + other[1:] + (None,))[:2]
+
+        if isinstance(other, int):
+            minElements, optElements = other, 0
+        elif isinstance(other, tuple):
+            other = tuple(o if o is not Ellipsis else None for o in other)
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0], int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self * other[0] + ZeroOrMore(self)
+            elif isinstance(other[0], int) and isinstance(other[1], int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError(
+                    "cannot multiply ParserElement and ({}) objects".format(
+                        ",".join(type(item).__name__ for item in other)
+                    )
+                )
+        else:
+            raise TypeError(
+                "cannot multiply ParserElement and {} objects".format(
+                    type(other).__name__
+                )
+            )
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError(
+                "second tuple value must be greater or equal to first tuple value"
+            )
+        if minElements == optElements == 0:
+            return And([])
+
+        if optElements:
+
+            def makeOptionalList(n):
+                if n > 1:
+                    return Opt(self + makeOptionalList(n - 1))
+                else:
+                    return Opt(self)
+
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self] * minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self] * minElements)
+        return ret
+
+    def __rmul__(self, other) -> "ParserElement":
+        return self.__mul__(other)
+
+    def __or__(self, other) -> "ParserElement":
+        """
+        Implementation of ``|`` operator - returns :class:`MatchFirst`
+        """
+        if other is Ellipsis:
+            return _PendingSkip(self, must_skip=True)
+
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return MatchFirst([self, other])
+
+    def __ror__(self, other) -> "ParserElement":
+        """
+        Implementation of ``|`` operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return other | self
+
+    def __xor__(self, other) -> "ParserElement":
+        """
+        Implementation of ``^`` operator - returns :class:`Or`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return Or([self, other])
+
+    def __rxor__(self, other) -> "ParserElement":
+        """
+        Implementation of ``^`` operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return other ^ self
+
+    def __and__(self, other) -> "ParserElement":
+        """
+        Implementation of ``&`` operator - returns :class:`Each`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return Each([self, other])
+
+    def __rand__(self, other) -> "ParserElement":
+        """
+        Implementation of ``&`` operator when left operand is not a :class:`ParserElement`
+        """
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        if not isinstance(other, ParserElement):
+            raise TypeError(
+                "Cannot combine element of type {} with ParserElement".format(
+                    type(other).__name__
+                )
+            )
+        return other & self
+
+    def __invert__(self) -> "ParserElement":
+        """
+        Implementation of ``~`` operator - returns :class:`NotAny`
+        """
+        return NotAny(self)
+
+    # disable __iter__ to override legacy use of sequential access to __getitem__ to
+    # iterate over a sequence
+    __iter__ = None
+
+    def __getitem__(self, key):
+        """
+        use ``[]`` indexing notation as a short form for expression repetition:
+
+        - ``expr[n]`` is equivalent to ``expr*n``
+        - ``expr[m, n]`` is equivalent to ``expr*(m, n)``
+        - ``expr[n, ...]`` or ``expr[n,]`` is equivalent
+             to ``expr*n + ZeroOrMore(expr)``
+             (read as "at least n instances of ``expr``")
+        - ``expr[..., n]`` is equivalent to ``expr*(0, n)``
+             (read as "0 to n instances of ``expr``")
+        - ``expr[...]`` and ``expr[0, ...]`` are equivalent to ``ZeroOrMore(expr)``
+        - ``expr[1, ...]`` is equivalent to ``OneOrMore(expr)``
+
+        ``None`` may be used in place of ``...``.
+
+        Note that ``expr[..., n]`` and ``expr[m, n]``do not raise an exception
+        if more than ``n`` ``expr``s exist in the input stream.  If this behavior is
+        desired, then write ``expr[..., n] + ~expr``.
+        """
+
+        # convert single arg keys to tuples
+        try:
+            if isinstance(key, str_type):
+                key = (key,)
+            iter(key)
+        except TypeError:
+            key = (key, key)
+
+        if len(key) > 2:
+            raise TypeError(
+                "only 1 or 2 index arguments supported ({}{})".format(
+                    key[:5], "... [{}]".format(len(key)) if len(key) > 5 else ""
+                )
+            )
+
+        # clip to 2 elements
+        ret = self * tuple(key[:2])
+        return ret
+
+    def __call__(self, name: str = None) -> "ParserElement":
+        """
+        Shortcut for :class:`set_results_name`, with ``list_all_matches=False``.
+
+        If ``name`` is given with a trailing ``'*'`` character, then ``list_all_matches`` will be
+        passed as ``True``.
+
+        If ``name` is omitted, same as calling :class:`copy`.
+
+        Example::
+
+            # these are equivalent
+            userdata = Word(alphas).set_results_name("name") + Word(nums + "-").set_results_name("socsecno")
+            userdata = Word(alphas)("name") + Word(nums + "-")("socsecno")
+        """
+        if name is not None:
+            return self._setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress(self) -> "ParserElement":
+        """
+        Suppresses the output of this :class:`ParserElement`; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress(self)
+
+    def ignore_whitespace(self, recursive: bool = True) -> "ParserElement":
+        """
+        Enables the skipping of whitespace before matching the characters in the
+        :class:`ParserElement`'s defined pattern.
+
+        :param recursive: If ``True`` (the default), also enable whitespace skipping in child elements (if any)
+        """
+        self.skipWhitespace = True
+        return self
+
+    def leave_whitespace(self, recursive: bool = True) -> "ParserElement":
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        :class:`ParserElement`'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+
+        :param recursive: If true (the default), also disable whitespace skipping in child elements (if any)
+        """
+        self.skipWhitespace = False
+        return self
+
+    def set_whitespace_chars(
+        self, chars: Union[Set[str], str], copy_defaults: bool = False
+    ) -> "ParserElement":
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = set(chars)
+        self.copyDefaultWhiteChars = copy_defaults
+        return self
+
+    def parse_with_tabs(self) -> "ParserElement":
+        """
+        Overrides default behavior to expand ``<TAB>`` s to spaces before parsing the input string.
+        Must be called before ``parse_string`` when the input grammar contains elements that
+        match ``<TAB>`` characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore(self, other: "ParserElement") -> "ParserElement":
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+
+        Example::
+
+            patt = Word(alphas)[1, ...]
+            patt.parse_string('ablaj /* comment */ lskjd')
+            # -> ['ablaj']
+
+            patt.ignore(c_style_comment)
+            patt.parse_string('ablaj /* comment */ lskjd')
+            # -> ['ablaj', 'lskjd']
+        """
+        import typing
+
+        if isinstance(other, str_type):
+            other = Suppress(other)
+
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append(Suppress(other.copy()))
+        return self
+
+    def set_debug_actions(
+        self,
+        start_action: DebugStartAction,
+        success_action: DebugSuccessAction,
+        exception_action: DebugExceptionAction,
+    ) -> "ParserElement":
+        """
+        Customize display of debugging messages while doing pattern matching:
+
+        - ``start_action`` - method to be called when an expression is about to be parsed;
+          should have the signature ``fn(input_string: str, location: int, expression: ParserElement, cache_hit: bool)``
+
+        - ``success_action`` - method to be called when an expression has successfully parsed;
+          should have the signature ``fn(input_string: str, start_location: int, end_location: int, expression: ParserELement, parsed_tokens: ParseResults, cache_hit: bool)``
+
+        - ``exception_action`` - method to be called when expression fails to parse;
+          should have the signature ``fn(input_string: str, location: int, expression: ParserElement, exception: Exception, cache_hit: bool)``
+        """
+        self.debugActions = self.DebugActions(
+            start_action or _default_start_debug_action,
+            success_action or _default_success_debug_action,
+            exception_action or _default_exception_debug_action,
+        )
+        self.debug = True
+        return self
+
+    def set_debug(self, flag: bool = True) -> "ParserElement":
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set ``flag`` to ``True`` to enable, ``False`` to disable.
+
+        Example::
+
+            wd = Word(alphas).set_name("alphaword")
+            integer = Word(nums).set_name("numword")
+            term = wd | integer
+
+            # turn on debugging for wd
+            wd.set_debug()
+
+            term[1, ...].parse_string("abc 123 xyz 890")
+
+        prints::
+
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using :class:`set_debug_actions`. Prior to attempting
+        to match the ``wd`` expression, the debugging message ``"Match <exprname> at loc <n>(<line>,<col>)"``
+        is shown. Then if the parse succeeds, a ``"Matched"`` message is shown, or an ``"Exception raised"``
+        message is shown. Also note the use of :class:`set_name` to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the :class:`Word` expression without calling ``set_name`` is ``"W:(A-Za-z)"``.
+        """
+        if flag:
+            self.set_debug_actions(
+                _default_start_debug_action,
+                _default_success_debug_action,
+                _default_exception_debug_action,
+            )
+        else:
+            self.debug = False
+        return self
+
+    @property
+    def default_name(self) -> str:
+        if self._defaultName is None:
+            self._defaultName = self._generateDefaultName()
+        return self._defaultName
+
+    @abstractmethod
+    def _generateDefaultName(self):
+        """
+        Child classes must define this method, which defines how the ``default_name`` is set.
+        """
+
+    def set_name(self, name: str) -> "ParserElement":
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+        Example::
+            Word(nums).parse_string("ABC")  # -> Exception: Expected W:(0-9) (at char 0), (line:1, col:1)
+            Word(nums).set_name("integer").parse_string("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.customName = name
+        self.errmsg = "Expected " + self.name
+        if __diag__.enable_debug_on_named_expressions:
+            self.set_debug()
+        return self
+
+    @property
+    def name(self) -> str:
+        # This will use a user-defined name if available, but otherwise defaults back to the auto-generated name
+        return self.customName if self.customName is not None else self.default_name
+
+    def __str__(self) -> str:
+        return self.name
+
+    def __repr__(self) -> str:
+        return str(self)
+
+    def streamline(self) -> "ParserElement":
+        self.streamlined = True
+        self._defaultName = None
+        return self
+
+    def recurse(self) -> Sequence["ParserElement"]:
+        return []
+
+    def _checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.recurse():
+            e._checkRecursion(subRecCheckList)
+
+    def validate(self, validateTrace=None) -> None:
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self._checkRecursion([])
+
+    def parse_file(
+        self,
+        file_or_filename: Union[str, Path, TextIO],
+        encoding: str = "utf-8",
+        parse_all: bool = False,
+        *,
+        parseAll: bool = False,
+    ) -> ParseResults:
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        parseAll = parseAll or parse_all
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r", encoding=encoding) as f:
+                file_contents = f.read()
+        try:
+            return self.parse_string(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc.with_traceback(None)
+
+    def __eq__(self, other):
+        if self is other:
+            return True
+        elif isinstance(other, str_type):
+            return self.matches(other, parse_all=True)
+        elif isinstance(other, ParserElement):
+            return vars(self) == vars(other)
+        return False
+
+    def __hash__(self):
+        return id(self)
+
+    def matches(
+        self, test_string: str, parse_all: bool = True, *, parseAll: bool = True
+    ) -> bool:
+        """
+        Method for quick testing of a parser against a test string. Good for simple
+        inline microtests of sub expressions while building up larger parser.
+
+        Parameters:
+        - ``test_string`` - to test against this expression for a match
+        - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests
+
+        Example::
+
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        parseAll = parseAll and parse_all
+        try:
+            self.parse_string(str(test_string), parse_all=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+
+    def run_tests(
+        self,
+        tests: Union[str, List[str]],
+        parse_all: bool = True,
+        comment: typing.Optional[Union["ParserElement", str]] = "#",
+        full_dump: bool = True,
+        print_results: bool = True,
+        failure_tests: bool = False,
+        post_parse: Callable[[str, ParseResults], str] = None,
+        file: typing.Optional[TextIO] = None,
+        with_line_numbers: bool = False,
+        *,
+        parseAll: bool = True,
+        fullDump: bool = True,
+        printResults: bool = True,
+        failureTests: bool = False,
+        postParse: Callable[[str, ParseResults], str] = None,
+    ) -> Tuple[bool, List[Tuple[str, Union[ParseResults, Exception]]]]:
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+
+        Parameters:
+        - ``tests`` - a list of separate test strings, or a multiline string of test strings
+        - ``parse_all`` - (default= ``True``) - flag to pass to :class:`parse_string` when running tests
+        - ``comment`` - (default= ``'#'``) - expression for indicating embedded comments in the test
+          string; pass None to disable comment filtering
+        - ``full_dump`` - (default= ``True``) - dump results as list followed by results names in nested outline;
+          if False, only dump nested list
+        - ``print_results`` - (default= ``True``) prints test output to stdout
+        - ``failure_tests`` - (default= ``False``) indicates if these tests are expected to fail parsing
+        - ``post_parse`` - (default= ``None``) optional callback for successful parse results; called as
+          `fn(test_string, parse_results)` and returns a string to be added to the test output
+        - ``file`` - (default= ``None``) optional file-like object to which test output will be written;
+          if None, will default to ``sys.stdout``
+        - ``with_line_numbers`` - default= ``False``) show test strings with line and column numbers
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if ``failure_tests`` is True), and the results contain a list of lines of each
+        test's output
+
+        Example::
+
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.run_tests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.run_tests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failure_tests=True)
+            print("Success" if result[0] else "Failed!")
+
+        prints::
+
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.run_tests(r"this is a test\\n of strings that spans \\n 3 lines")
+
+        (Note that this is a raw string literal, you must include the leading ``'r'``.)
+        """
+        from .testing import pyparsing_test
+
+        parseAll = parseAll and parse_all
+        fullDump = fullDump and full_dump
+        printResults = printResults and print_results
+        failureTests = failureTests or failure_tests
+        postParse = postParse or post_parse
+        if isinstance(tests, str_type):
+            line_strip = type(tests).strip
+            tests = [line_strip(test_line) for test_line in tests.rstrip().splitlines()]
+        if isinstance(comment, str_type):
+            comment = Literal(comment)
+        if file is None:
+            file = sys.stdout
+        print_ = file.write
+
+        result: Union[ParseResults, Exception]
+        allResults = []
+        comments = []
+        success = True
+        NL = Literal(r"\n").add_parse_action(replace_with("\n")).ignore(quoted_string)
+        BOM = "\ufeff"
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(
+                    pyparsing_test.with_line_numbers(t) if with_line_numbers else t
+                )
+                continue
+            if not t:
+                continue
+            out = [
+                "\n" + "\n".join(comments) if comments else "",
+                pyparsing_test.with_line_numbers(t) if with_line_numbers else t,
+            ]
+            comments = []
+            try:
+                # convert newline marks to actual newlines, and strip leading BOM if present
+                t = NL.transform_string(t.lstrip(BOM))
+                result = self.parse_string(t, parse_all=parseAll)
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                out.append(pe.explain())
+                out.append("FAIL: " + str(pe))
+                if ParserElement.verbose_stacktrace:
+                    out.extend(traceback.format_tb(pe.__traceback__))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: {}: {}".format(type(exc).__name__, exc))
+                if ParserElement.verbose_stacktrace:
+                    out.extend(traceback.format_tb(exc.__traceback__))
+                success = success and failureTests
+                result = exc
+            else:
+                success = success and not failureTests
+                if postParse is not None:
+                    try:
+                        pp_value = postParse(t, result)
+                        if pp_value is not None:
+                            if isinstance(pp_value, ParseResults):
+                                out.append(pp_value.dump())
+                            else:
+                                out.append(str(pp_value))
+                        else:
+                            out.append(result.dump())
+                    except Exception as e:
+                        out.append(result.dump(full=fullDump))
+                        out.append(
+                            "{} failed: {}: {}".format(
+                                postParse.__name__, type(e).__name__, e
+                            )
+                        )
+                else:
+                    out.append(result.dump(full=fullDump))
+            out.append("")
+
+            if printResults:
+                print_("\n".join(out))
+
+            allResults.append((t, result))
+
+        return success, allResults
+
+    def create_diagram(
+        self,
+        output_html: Union[TextIO, Path, str],
+        vertical: int = 3,
+        show_results_names: bool = False,
+        show_groups: bool = False,
+        **kwargs,
+    ) -> None:
+        """
+        Create a railroad diagram for the parser.
+
+        Parameters:
+        - output_html (str or file-like object) - output target for generated
+          diagram HTML
+        - vertical (int) - threshold for formatting multiple alternatives vertically
+          instead of horizontally (default=3)
+        - show_results_names - bool flag whether diagram should show annotations for
+          defined results names
+        - show_groups - bool flag whether groups should be highlighted with an unlabeled surrounding box
+        Additional diagram-formatting keyword arguments can also be included;
+        see railroad.Diagram class.
+        """
+
+        try:
+            from .diagram import to_railroad, railroad_to_html
+        except ImportError as ie:
+            raise Exception(
+                "must ``pip install pyparsing[diagrams]`` to generate parser railroad diagrams"
+            ) from ie
+
+        self.streamline()
+
+        railroad = to_railroad(
+            self,
+            vertical=vertical,
+            show_results_names=show_results_names,
+            show_groups=show_groups,
+            diagram_kwargs=kwargs,
+        )
+        if isinstance(output_html, (str, Path)):
+            with open(output_html, "w", encoding="utf-8") as diag_file:
+                diag_file.write(railroad_to_html(railroad))
+        else:
+            # we were passed a file-like object, just write to it
+            output_html.write(railroad_to_html(railroad))
+
+    setDefaultWhitespaceChars = set_default_whitespace_chars
+    inlineLiteralsUsing = inline_literals_using
+    setResultsName = set_results_name
+    setBreak = set_break
+    setParseAction = set_parse_action
+    addParseAction = add_parse_action
+    addCondition = add_condition
+    setFailAction = set_fail_action
+    tryParse = try_parse
+    canParseNext = can_parse_next
+    resetCache = reset_cache
+    enableLeftRecursion = enable_left_recursion
+    enablePackrat = enable_packrat
+    parseString = parse_string
+    scanString = scan_string
+    searchString = search_string
+    transformString = transform_string
+    setWhitespaceChars = set_whitespace_chars
+    parseWithTabs = parse_with_tabs
+    setDebugActions = set_debug_actions
+    setDebug = set_debug
+    defaultName = default_name
+    setName = set_name
+    parseFile = parse_file
+    runTests = run_tests
+    ignoreWhitespace = ignore_whitespace
+    leaveWhitespace = leave_whitespace
+
+
+class _PendingSkip(ParserElement):
+    # internal placeholder class to hold a place were '...' is added to a parser element,
+    # once another ParserElement is added, this placeholder will be replaced with a SkipTo
+    def __init__(self, expr: ParserElement, must_skip: bool = False):
+        super().__init__()
+        self.anchor = expr
+        self.must_skip = must_skip
+
+    def _generateDefaultName(self):
+        return str(self.anchor + Empty()).replace("Empty", "...")
+
+    def __add__(self, other) -> "ParserElement":
+        skipper = SkipTo(other).set_name("...")("_skipped*")
+        if self.must_skip:
+
+            def must_skip(t):
+                if not t._skipped or t._skipped.as_list() == [""]:
+                    del t[0]
+                    t.pop("_skipped", None)
+
+            def show_skip(t):
+                if t._skipped.as_list()[-1:] == [""]:
+                    t.pop("_skipped")
+                    t["_skipped"] = "missing <" + repr(self.anchor) + ">"
+
+            return (
+                self.anchor + skipper().add_parse_action(must_skip)
+                | skipper().add_parse_action(show_skip)
+            ) + other
+
+        return self.anchor + skipper + other
+
+    def __repr__(self):
+        return self.defaultName
+
+    def parseImpl(self, *args):
+        raise Exception(
+            "use of `...` expression without following SkipTo target expression"
+        )
+
+
+class Token(ParserElement):
+    """Abstract :class:`ParserElement` subclass, for defining atomic
+    matching patterns.
+    """
+
+    def __init__(self):
+        super().__init__(savelist=False)
+
+    def _generateDefaultName(self):
+        return type(self).__name__
+
+
+class Empty(Token):
+    """
+    An empty token, will always match.
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """
+    A token that will never match.
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """
+    Token to exactly match a specified string.
+
+    Example::
+
+        Literal('blah').parse_string('blah')  # -> ['blah']
+        Literal('blah').parse_string('blahfooblah')  # -> ['blah']
+        Literal('blah').parse_string('bla')  # -> Exception: Expected "blah"
+
+    For case-insensitive matching, use :class:`CaselessLiteral`.
+
+    For keyword matching (force word break before and after the matched string),
+    use :class:`Keyword` or :class:`CaselessKeyword`.
+    """
+
+    def __init__(self, match_string: str = "", *, matchString: str = ""):
+        super().__init__()
+        match_string = matchString or match_string
+        self.match = match_string
+        self.matchLen = len(match_string)
+        try:
+            self.firstMatchChar = match_string[0]
+        except IndexError:
+            raise ValueError("null string passed to Literal; use Empty() instead")
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+        # Performance tuning: modify __class__ to select
+        # a parseImpl optimized for single-character check
+        if self.matchLen == 1 and type(self) is Literal:
+            self.__class__ = _SingleCharLiteral
+
+    def _generateDefaultName(self):
+        return repr(self.match)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] == self.firstMatchChar and instring.startswith(
+            self.match, loc
+        ):
+            return loc + self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class _SingleCharLiteral(Literal):
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] == self.firstMatchChar:
+            return loc + 1, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+ParserElement._literalStringClass = Literal
+
+
+class Keyword(Token):
+    """
+    Token to exactly match a specified string as a keyword, that is,
+    it must be immediately followed by a non-keyword character.  Compare
+    with :class:`Literal`:
+
+    - ``Literal("if")`` will match the leading ``'if'`` in
+      ``'ifAndOnlyIf'``.
+    - ``Keyword("if")`` will not; it will only match the leading
+      ``'if'`` in ``'if x=1'``, or ``'if(y==2)'``
+
+    Accepts two optional constructor arguments in addition to the
+    keyword string:
+
+    - ``identChars`` is a string of characters that would be valid
+      identifier characters, defaulting to all alphanumerics + "_" and
+      "$"
+    - ``caseless`` allows case-insensitive matching, default is ``False``.
+
+    Example::
+
+        Keyword("start").parse_string("start")  # -> ['start']
+        Keyword("start").parse_string("starting")  # -> Exception
+
+    For case-insensitive matching, use :class:`CaselessKeyword`.
+    """
+
+    DEFAULT_KEYWORD_CHARS = alphanums + "_$"
+
+    def __init__(
+        self,
+        match_string: str = "",
+        ident_chars: typing.Optional[str] = None,
+        caseless: bool = False,
+        *,
+        matchString: str = "",
+        identChars: typing.Optional[str] = None,
+    ):
+        super().__init__()
+        identChars = identChars or ident_chars
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        match_string = matchString or match_string
+        self.match = match_string
+        self.matchLen = len(match_string)
+        try:
+            self.firstMatchChar = match_string[0]
+        except IndexError:
+            raise ValueError("null string passed to Keyword; use Empty() instead")
+        self.errmsg = "Expected {} {}".format(type(self).__name__, self.name)
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = match_string.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def _generateDefaultName(self):
+        return repr(self.match)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        errmsg = self.errmsg
+        errloc = loc
+        if self.caseless:
+            if instring[loc : loc + self.matchLen].upper() == self.caselessmatch:
+                if loc == 0 or instring[loc - 1].upper() not in self.identChars:
+                    if (
+                        loc >= len(instring) - self.matchLen
+                        or instring[loc + self.matchLen].upper() not in self.identChars
+                    ):
+                        return loc + self.matchLen, self.match
+                    else:
+                        # followed by keyword char
+                        errmsg += ", was immediately followed by keyword character"
+                        errloc = loc + self.matchLen
+                else:
+                    # preceded by keyword char
+                    errmsg += ", keyword was immediately preceded by keyword character"
+                    errloc = loc - 1
+            # else no match just raise plain exception
+
+        else:
+            if (
+                instring[loc] == self.firstMatchChar
+                and self.matchLen == 1
+                or instring.startswith(self.match, loc)
+            ):
+                if loc == 0 or instring[loc - 1] not in self.identChars:
+                    if (
+                        loc >= len(instring) - self.matchLen
+                        or instring[loc + self.matchLen] not in self.identChars
+                    ):
+                        return loc + self.matchLen, self.match
+                    else:
+                        # followed by keyword char
+                        errmsg += (
+                            ", keyword was immediately followed by keyword character"
+                        )
+                        errloc = loc + self.matchLen
+                else:
+                    # preceded by keyword char
+                    errmsg += ", keyword was immediately preceded by keyword character"
+                    errloc = loc - 1
+            # else no match just raise plain exception
+
+        raise ParseException(instring, errloc, errmsg, self)
+
+    @staticmethod
+    def set_default_keyword_chars(chars) -> None:
+        """
+        Overrides the default characters used by :class:`Keyword` expressions.
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+    setDefaultKeywordChars = set_default_keyword_chars
+
+
+class CaselessLiteral(Literal):
+    """
+    Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+
+        CaselessLiteral("CMD")[1, ...].parse_string("cmd CMD Cmd10")
+        # -> ['CMD', 'CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessKeyword`.)
+    """
+
+    def __init__(self, match_string: str = "", *, matchString: str = ""):
+        match_string = matchString or match_string
+        super().__init__(match_string.upper())
+        # Preserve the defining literal.
+        self.returnString = match_string
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc : loc + self.matchLen].upper() == self.match:
+            return loc + self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of :class:`Keyword`.
+
+    Example::
+
+        CaselessKeyword("CMD")[1, ...].parse_string("cmd CMD Cmd10")
+        # -> ['CMD', 'CMD']
+
+    (Contrast with example for :class:`CaselessLiteral`.)
+    """
+
+    def __init__(
+        self,
+        match_string: str = "",
+        ident_chars: typing.Optional[str] = None,
+        *,
+        matchString: str = "",
+        identChars: typing.Optional[str] = None,
+    ):
+        identChars = identChars or ident_chars
+        match_string = matchString or match_string
+        super().__init__(match_string, identChars, caseless=True)
+
+
+class CloseMatch(Token):
+    """A variation on :class:`Literal` which matches "close" matches,
+    that is, strings with at most 'n' mismatching characters.
+    :class:`CloseMatch` takes parameters:
+
+    - ``match_string`` - string to be matched
+    - ``caseless`` - a boolean indicating whether to ignore casing when comparing characters
+    - ``max_mismatches`` - (``default=1``) maximum number of
+      mismatches allowed to count as a match
+
+    The results from a successful parse will contain the matched text
+    from the input string and the following named results:
+
+    - ``mismatches`` - a list of the positions within the
+      match_string where mismatches were found
+    - ``original`` - the original match_string used to compare
+      against the input string
+
+    If ``mismatches`` is an empty list, then the match was an exact
+    match.
+
+    Example::
+
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parse_string("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parse_string("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parse_string("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", max_mismatches=2)
+        patt.parse_string("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+
+    def __init__(
+        self,
+        match_string: str,
+        max_mismatches: int = None,
+        *,
+        maxMismatches: int = 1,
+        caseless=False,
+    ):
+        maxMismatches = max_mismatches if max_mismatches is not None else maxMismatches
+        super().__init__()
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected {!r} (with up to {} mismatches)".format(
+            self.match_string, self.maxMismatches
+        )
+        self.caseless = caseless
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def _generateDefaultName(self):
+        return "{}:{!r}".format(type(self).__name__, self.match_string)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc, s_m in enumerate(
+                zip(instring[loc:maxloc], match_string)
+            ):
+                src, mat = s_m
+                if self.caseless:
+                    src, mat = src.lower(), mat.lower()
+
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = start + match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results["original"] = match_string
+                results["mismatches"] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """Token for matching words composed of allowed character sets.
+    Parameters:
+    - ``init_chars`` - string of all characters that should be used to
+      match as a word; "ABC" will match "AAA", "ABAB", "CBAC", etc.;
+      if ``body_chars`` is also specified, then this is the string of
+      initial characters
+    - ``body_chars`` - string of characters that
+      can be used for matching after a matched initial character as
+      given in ``init_chars``; if omitted, same as the initial characters
+      (default=``None``)
+    - ``min`` - minimum number of characters to match (default=1)
+    - ``max`` - maximum number of characters to match (default=0)
+    - ``exact`` - exact number of characters to match (default=0)
+    - ``as_keyword`` - match as a keyword (default=``False``)
+    - ``exclude_chars`` - characters that might be
+      found in the input ``body_chars`` string but which should not be
+      accepted for matching ;useful to define a word of all
+      printables except for one or two characters, for instance
+      (default=``None``)
+
+    :class:`srange` is useful for defining custom character set strings
+    for defining :class:`Word` expressions, using range notation from
+    regular expression character sets.
+
+    A common mistake is to use :class:`Word` to match a specific literal
+    string, as in ``Word("Address")``. Remember that :class:`Word`
+    uses the string argument to define *sets* of matchable characters.
+    This expression would match "Add", "AAA", "dAred", or any other word
+    made up of the characters 'A', 'd', 'r', 'e', and 's'. To match an
+    exact literal string, use :class:`Literal` or :class:`Keyword`.
+
+    pyparsing includes helper strings for building Words:
+
+    - :class:`alphas`
+    - :class:`nums`
+    - :class:`alphanums`
+    - :class:`hexnums`
+    - :class:`alphas8bit` (alphabetic characters in ASCII range 128-255
+      - accented, tilded, umlauted, etc.)
+    - :class:`punc8bit` (non-alphabetic characters in ASCII range
+      128-255 - currency, symbols, superscripts, diacriticals, etc.)
+    - :class:`printables` (any non-whitespace character)
+
+    ``alphas``, ``nums``, and ``printables`` are also defined in several
+    Unicode sets - see :class:`pyparsing_unicode``.
+
+    Example::
+
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums + '-')
+
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, exclude_chars=",")
+    """
+
+    def __init__(
+        self,
+        init_chars: str = "",
+        body_chars: typing.Optional[str] = None,
+        min: int = 1,
+        max: int = 0,
+        exact: int = 0,
+        as_keyword: bool = False,
+        exclude_chars: typing.Optional[str] = None,
+        *,
+        initChars: typing.Optional[str] = None,
+        bodyChars: typing.Optional[str] = None,
+        asKeyword: bool = False,
+        excludeChars: typing.Optional[str] = None,
+    ):
+        initChars = initChars or init_chars
+        bodyChars = bodyChars or body_chars
+        asKeyword = asKeyword or as_keyword
+        excludeChars = excludeChars or exclude_chars
+        super().__init__()
+        if not initChars:
+            raise ValueError(
+                "invalid {}, initChars cannot be empty string".format(
+                    type(self).__name__
+                )
+            )
+
+        initChars = set(initChars)
+        self.initChars = initChars
+        if excludeChars:
+            excludeChars = set(excludeChars)
+            initChars -= excludeChars
+            if bodyChars:
+                bodyChars = set(bodyChars) - excludeChars
+        self.initCharsOrig = "".join(sorted(initChars))
+
+        if bodyChars:
+            self.bodyCharsOrig = "".join(sorted(bodyChars))
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = "".join(sorted(initChars))
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError(
+                "cannot specify a minimum length < 1; use Opt(Word()) if zero-length word is permitted"
+            )
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        # see if we can make a regex for this Word
+        if " " not in self.initChars | self.bodyChars and (min == 1 and exact == 0):
+            if self.bodyChars == self.initChars:
+                if max == 0:
+                    repeat = "+"
+                elif max == 1:
+                    repeat = ""
+                else:
+                    repeat = "{{{},{}}}".format(
+                        self.minLen, "" if self.maxLen == _MAX_INT else self.maxLen
+                    )
+                self.reString = "[{}]{}".format(
+                    _collapse_string_to_ranges(self.initChars),
+                    repeat,
+                )
+            elif len(self.initChars) == 1:
+                if max == 0:
+                    repeat = "*"
+                else:
+                    repeat = "{{0,{}}}".format(max - 1)
+                self.reString = "{}[{}]{}".format(
+                    re.escape(self.initCharsOrig),
+                    _collapse_string_to_ranges(self.bodyChars),
+                    repeat,
+                )
+            else:
+                if max == 0:
+                    repeat = "*"
+                elif max == 2:
+                    repeat = ""
+                else:
+                    repeat = "{{0,{}}}".format(max - 1)
+                self.reString = "[{}][{}]{}".format(
+                    _collapse_string_to_ranges(self.initChars),
+                    _collapse_string_to_ranges(self.bodyChars),
+                    repeat,
+                )
+            if self.asKeyword:
+                self.reString = r"\b" + self.reString + r"\b"
+
+            try:
+                self.re = re.compile(self.reString)
+            except re.error:
+                self.re = None
+            else:
+                self.re_match = self.re.match
+                self.__class__ = _WordRegex
+
+    def _generateDefaultName(self):
+        def charsAsStr(s):
+            max_repr_len = 16
+            s = _collapse_string_to_ranges(s, re_escape=False)
+            if len(s) > max_repr_len:
+                return s[: max_repr_len - 3] + "..."
+            else:
+                return s
+
+        if self.initChars != self.bodyChars:
+            base = "W:({}, {})".format(
+                charsAsStr(self.initChars), charsAsStr(self.bodyChars)
+            )
+        else:
+            base = "W:({})".format(charsAsStr(self.initChars))
+
+        # add length specification
+        if self.minLen > 1 or self.maxLen != _MAX_INT:
+            if self.minLen == self.maxLen:
+                if self.minLen == 1:
+                    return base[2:]
+                else:
+                    return base + "{{{}}}".format(self.minLen)
+            elif self.maxLen == _MAX_INT:
+                return base + "{{{},...}}".format(self.minLen)
+            else:
+                return base + "{{{},{}}}".format(self.minLen, self.maxLen)
+        return base
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] not in self.initChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min(maxloc, instrlen)
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        elif self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        elif self.asKeyword:
+            if (
+                start > 0
+                and instring[start - 1] in bodychars
+                or loc < instrlen
+                and instring[loc] in bodychars
+            ):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _WordRegex(Word):
+    def parseImpl(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        return loc, result.group()
+
+
+class Char(_WordRegex):
+    """A short-cut class for defining :class:`Word` ``(characters, exact=1)``,
+    when defining a match of any single character in a string of
+    characters.
+    """
+
+    def __init__(
+        self,
+        charset: str,
+        as_keyword: bool = False,
+        exclude_chars: typing.Optional[str] = None,
+        *,
+        asKeyword: bool = False,
+        excludeChars: typing.Optional[str] = None,
+    ):
+        asKeyword = asKeyword or as_keyword
+        excludeChars = excludeChars or exclude_chars
+        super().__init__(
+            charset, exact=1, asKeyword=asKeyword, excludeChars=excludeChars
+        )
+        self.reString = "[{}]".format(_collapse_string_to_ranges(self.initChars))
+        if asKeyword:
+            self.reString = r"\b{}\b".format(self.reString)
+        self.re = re.compile(self.reString)
+        self.re_match = self.re.match
+
+
+class Regex(Token):
+    r"""Token for matching strings that match a given regular
+    expression. Defined with string specifying the regular expression in
+    a form recognized by the stdlib Python  `re module <https://docs.python.org/3/library/re.html>`_.
+    If the given regex contains named groups (defined using ``(?P<name>...)``),
+    these will be preserved as named :class:`ParseResults`.
+
+    If instead of the Python stdlib ``re`` module you wish to use a different RE module
+    (such as the ``regex`` module), you can do so by building your ``Regex`` object with
+    a compiled RE that was compiled using ``regex``.
+
+    Example::
+
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        # ref: https://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+
+        # named fields in a regex will be returned as named results
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+
+        # the Regex class will accept re's compiled using the regex module
+        import regex
+        parser = pp.Regex(regex.compile(r'[0-9]'))
+    """
+
+    def __init__(
+        self,
+        pattern: Any,
+        flags: Union[re.RegexFlag, int] = 0,
+        as_group_list: bool = False,
+        as_match: bool = False,
+        *,
+        asGroupList: bool = False,
+        asMatch: bool = False,
+    ):
+        """The parameters ``pattern`` and ``flags`` are passed
+        to the ``re.compile()`` function as-is. See the Python
+        `re module <https://docs.python.org/3/library/re.html>`_ module for an
+        explanation of the acceptable patterns and flags.
+        """
+        super().__init__()
+        asGroupList = asGroupList or as_group_list
+        asMatch = asMatch or as_match
+
+        if isinstance(pattern, str_type):
+            if not pattern:
+                raise ValueError("null string passed to Regex; use Empty() instead")
+
+            self._re = None
+            self.reString = self.pattern = pattern
+            self.flags = flags
+
+        elif hasattr(pattern, "pattern") and hasattr(pattern, "match"):
+            self._re = pattern
+            self.pattern = self.reString = pattern.pattern
+            self.flags = flags
+
+        else:
+            raise TypeError(
+                "Regex may only be constructed with a string or a compiled RE object"
+            )
+
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asGroupList = asGroupList
+        self.asMatch = asMatch
+        if self.asGroupList:
+            self.parseImpl = self.parseImplAsGroupList
+        if self.asMatch:
+            self.parseImpl = self.parseImplAsMatch
+
+    @cached_property
+    def re(self):
+        if self._re:
+            return self._re
+        else:
+            try:
+                return re.compile(self.pattern, self.flags)
+            except re.error:
+                raise ValueError(
+                    "invalid pattern ({!r}) passed to Regex".format(self.pattern)
+                )
+
+    @cached_property
+    def re_match(self):
+        return self.re.match
+
+    @cached_property
+    def mayReturnEmpty(self):
+        return self.re_match("") is not None
+
+    def _generateDefaultName(self):
+        return "Re:({})".format(repr(self.pattern).replace("\\\\", "\\"))
+
+    def parseImpl(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = ParseResults(result.group())
+        d = result.groupdict()
+        if d:
+            for k, v in d.items():
+                ret[k] = v
+        return loc, ret
+
+    def parseImplAsGroupList(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.groups()
+        return loc, ret
+
+    def parseImplAsMatch(self, instring, loc, doActions=True):
+        result = self.re_match(instring, loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result
+        return loc, ret
+
+    def sub(self, repl: str) -> ParserElement:
+        r"""
+        Return :class:`Regex` with an attached parse action to transform the parsed
+        result as if called using `re.sub(expr, repl, string) <https://docs.python.org/3/library/re.html#re.sub>`_.
+
+        Example::
+
+            make_html = Regex(r"(\w+):(.*?):").sub(r"<\1>\2</\1>")
+            print(make_html.transform_string("h1:main title:"))
+            # prints "<h1>main title</h1>"
+        """
+        if self.asGroupList:
+            raise TypeError("cannot use sub() with Regex(asGroupList=True)")
+
+        if self.asMatch and callable(repl):
+            raise TypeError("cannot use sub() with a callable with Regex(asMatch=True)")
+
+        if self.asMatch:
+
+            def pa(tokens):
+                return tokens[0].expand(repl)
+
+        else:
+
+            def pa(tokens):
+                return self.re.sub(repl, tokens[0])
+
+        return self.add_parse_action(pa)
+
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+
+    Defined with the following parameters:
+
+    - ``quote_char`` - string of one or more characters defining the
+      quote delimiting string
+    - ``esc_char`` - character to re_escape quotes, typically backslash
+      (default= ``None``)
+    - ``esc_quote`` - special quote sequence to re_escape an embedded quote
+      string (such as SQL's ``""`` to re_escape an embedded ``"``)
+      (default= ``None``)
+    - ``multiline`` - boolean indicating whether quotes can span
+      multiple lines (default= ``False``)
+    - ``unquote_results`` - boolean indicating whether the matched text
+      should be unquoted (default= ``True``)
+    - ``end_quote_char`` - string of one or more characters defining the
+      end of the quote delimited string (default= ``None``  => same as
+      quote_char)
+    - ``convert_whitespace_escapes`` - convert escaped whitespace
+      (``'\t'``, ``'\n'``, etc.) to actual whitespace
+      (default= ``True``)
+
+    Example::
+
+        qs = QuotedString('"')
+        print(qs.search_string('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', end_quote_char='}}')
+        print(complex_qs.search_string('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', esc_quote='""')
+        print(sql_qs.search_string('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+
+    prints::
+
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    ws_map = ((r"\t", "\t"), (r"\n", "\n"), (r"\f", "\f"), (r"\r", "\r"))
+
+    def __init__(
+        self,
+        quote_char: str = "",
+        esc_char: typing.Optional[str] = None,
+        esc_quote: typing.Optional[str] = None,
+        multiline: bool = False,
+        unquote_results: bool = True,
+        end_quote_char: typing.Optional[str] = None,
+        convert_whitespace_escapes: bool = True,
+        *,
+        quoteChar: str = "",
+        escChar: typing.Optional[str] = None,
+        escQuote: typing.Optional[str] = None,
+        unquoteResults: bool = True,
+        endQuoteChar: typing.Optional[str] = None,
+        convertWhitespaceEscapes: bool = True,
+    ):
+        super().__init__()
+        escChar = escChar or esc_char
+        escQuote = escQuote or esc_quote
+        unquoteResults = unquoteResults and unquote_results
+        endQuoteChar = endQuoteChar or end_quote_char
+        convertWhitespaceEscapes = (
+            convertWhitespaceEscapes and convert_whitespace_escapes
+        )
+        quote_char = quoteChar or quote_char
+
+        # remove white space from quote chars - wont work anyway
+        quote_char = quote_char.strip()
+        if not quote_char:
+            raise ValueError("quote_char cannot be the empty string")
+
+        if endQuoteChar is None:
+            endQuoteChar = quote_char
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                raise ValueError("endQuoteChar cannot be the empty string")
+
+        self.quoteChar = quote_char
+        self.quoteCharLen = len(quote_char)
+        self.firstQuoteChar = quote_char[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        sep = ""
+        inner_pattern = ""
+
+        if escQuote:
+            inner_pattern += r"{}(?:{})".format(sep, re.escape(escQuote))
+            sep = "|"
+
+        if escChar:
+            inner_pattern += r"{}(?:{}.)".format(sep, re.escape(escChar))
+            sep = "|"
+            self.escCharReplacePattern = re.escape(self.escChar) + "(.)"
+
+        if len(self.endQuoteChar) > 1:
+            inner_pattern += (
+                "{}(?:".format(sep)
+                + "|".join(
+                    "(?:{}(?!{}))".format(
+                        re.escape(self.endQuoteChar[:i]),
+                        re.escape(self.endQuoteChar[i:]),
+                    )
+                    for i in range(len(self.endQuoteChar) - 1, 0, -1)
+                )
+                + ")"
+            )
+            sep = "|"
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            inner_pattern += r"{}(?:[^{}{}])".format(
+                sep,
+                _escape_regex_range_chars(self.endQuoteChar[0]),
+                (_escape_regex_range_chars(escChar) if escChar is not None else ""),
+            )
+        else:
+            self.flags = 0
+            inner_pattern += r"{}(?:[^{}\n\r{}])".format(
+                sep,
+                _escape_regex_range_chars(self.endQuoteChar[0]),
+                (_escape_regex_range_chars(escChar) if escChar is not None else ""),
+            )
+
+        self.pattern = "".join(
+            [
+                re.escape(self.quoteChar),
+                "(?:",
+                inner_pattern,
+                ")*",
+                re.escape(self.endQuoteChar),
+            ]
+        )
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+            self.re_match = self.re.match
+        except re.error:
+            raise ValueError(
+                "invalid pattern {!r} passed to Regex".format(self.pattern)
+            )
+
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def _generateDefaultName(self):
+        if self.quoteChar == self.endQuoteChar and isinstance(self.quoteChar, str_type):
+            return "string enclosed in {!r}".format(self.quoteChar)
+
+        return "quoted string, starting with {} ending with {}".format(
+            self.quoteChar, self.endQuoteChar
+        )
+
+    def parseImpl(self, instring, loc, doActions=True):
+        result = (
+            instring[loc] == self.firstQuoteChar
+            and self.re_match(instring, loc)
+            or None
+        )
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen : -self.endQuoteCharLen]
+
+            if isinstance(ret, str_type):
+                # replace escaped whitespace
+                if "\\" in ret and self.convertWhitespaceEscapes:
+                    for wslit, wschar in self.ws_map:
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+
+class CharsNotIn(Token):
+    """Token for matching words composed of characters *not* in a given
+    set (will include whitespace in matched characters if not listed in
+    the provided exclusion set - see example). Defined with string
+    containing all disallowed characters, and an optional minimum,
+    maximum, and/or exact length.  The default value for ``min`` is
+    1 (a minimum value < 1 is not valid); the default values for
+    ``max`` and ``exact`` are 0, meaning no maximum or exact
+    length restriction.
+
+    Example::
+
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimited_list(csv_value).parse_string("dkls,lsdkjf,s12 34,@!#,213"))
+
+    prints::
+
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+
+    def __init__(
+        self,
+        not_chars: str = "",
+        min: int = 1,
+        max: int = 0,
+        exact: int = 0,
+        *,
+        notChars: str = "",
+    ):
+        super().__init__()
+        self.skipWhitespace = False
+        self.notChars = not_chars or notChars
+        self.notCharsSet = set(self.notChars)
+
+        if min < 1:
+            raise ValueError(
+                "cannot specify a minimum length < 1; use "
+                "Opt(CharsNotIn()) if zero-length char group is permitted"
+            )
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = self.minLen == 0
+        self.mayIndexError = False
+
+    def _generateDefaultName(self):
+        not_chars_str = _collapse_string_to_ranges(self.notChars)
+        if len(not_chars_str) > 16:
+            return "!W:({}...)".format(self.notChars[: 16 - 3])
+        else:
+            return "!W:({})".format(self.notChars)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        notchars = self.notCharsSet
+        if instring[loc] in notchars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        maxlen = min(start + self.maxLen, len(instring))
+        while loc < maxlen and instring[loc] not in notchars:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class White(Token):
+    """Special matching class for matching whitespace.  Normally,
+    whitespace is ignored by pyparsing grammars.  This class is included
+    when some whitespace structures are significant.  Define with
+    a string containing the whitespace characters to be matched; default
+    is ``" \\t\\r\\n"``.  Also takes optional ``min``,
+    ``max``, and ``exact`` arguments, as defined for the
+    :class:`Word` class.
+    """
+
+    whiteStrs = {
+        " ": "<SP>",
+        "\t": "<TAB>",
+        "\n": "<LF>",
+        "\r": "<CR>",
+        "\f": "<FF>",
+        "\u00A0": "<NBSP>",
+        "\u1680": "<OGHAM_SPACE_MARK>",
+        "\u180E": "<MONGOLIAN_VOWEL_SEPARATOR>",
+        "\u2000": "<EN_QUAD>",
+        "\u2001": "<EM_QUAD>",
+        "\u2002": "<EN_SPACE>",
+        "\u2003": "<EM_SPACE>",
+        "\u2004": "<THREE-PER-EM_SPACE>",
+        "\u2005": "<FOUR-PER-EM_SPACE>",
+        "\u2006": "<SIX-PER-EM_SPACE>",
+        "\u2007": "<FIGURE_SPACE>",
+        "\u2008": "<PUNCTUATION_SPACE>",
+        "\u2009": "<THIN_SPACE>",
+        "\u200A": "<HAIR_SPACE>",
+        "\u200B": "<ZERO_WIDTH_SPACE>",
+        "\u202F": "<NNBSP>",
+        "\u205F": "<MMSP>",
+        "\u3000": "<IDEOGRAPHIC_SPACE>",
+    }
+
+    def __init__(self, ws: str = " \t\r\n", min: int = 1, max: int = 0, exact: int = 0):
+        super().__init__()
+        self.matchWhite = ws
+        self.set_whitespace_chars(
+            "".join(c for c in self.whiteStrs if c not in self.matchWhite),
+            copy_defaults=True,
+        )
+        # self.leave_whitespace()
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def _generateDefaultName(self):
+        return "".join(White.whiteStrs[c] for c in self.matchWhite)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if instring[loc] not in self.matchWhite:
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min(maxloc, len(instring))
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class PositionToken(Token):
+    def __init__(self):
+        super().__init__()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class GoToColumn(PositionToken):
+    """Token to advance to a specific column of input text; useful for
+    tabular report scraping.
+    """
+
+    def __init__(self, colno: int):
+        super().__init__()
+        self.col = colno
+
+    def preParse(self, instring, loc):
+        if col(loc, instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables(instring, loc)
+            while (
+                loc < instrlen
+                and instring[loc].isspace()
+                and col(loc, instring) != self.col
+            ):
+                loc += 1
+        return loc
+
+    def parseImpl(self, instring, loc, doActions=True):
+        thiscol = col(loc, instring)
+        if thiscol > self.col:
+            raise ParseException(instring, loc, "Text not in expected column", self)
+        newloc = loc + self.col - thiscol
+        ret = instring[loc:newloc]
+        return newloc, ret
+
+
+class LineStart(PositionToken):
+    r"""Matches if current position is at the beginning of a line within
+    the parse string
+
+    Example::
+
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).search_string(test):
+            print(t)
+
+    prints::
+
+        ['AAA', ' this line']
+        ['AAA', ' and this line']
+
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.leave_whitespace()
+        self.orig_whiteChars = set() | self.whiteChars
+        self.whiteChars.discard("\n")
+        self.skipper = Empty().set_whitespace_chars(self.whiteChars)
+        self.errmsg = "Expected start of line"
+
+    def preParse(self, instring, loc):
+        if loc == 0:
+            return loc
+        else:
+            ret = self.skipper.preParse(instring, loc)
+            if "\n" in self.orig_whiteChars:
+                while instring[ret : ret + 1] == "\n":
+                    ret = self.skipper.preParse(instring, ret + 1)
+            return ret
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class LineEnd(PositionToken):
+    """Matches if current position is at the end of a line within the
+    parse string
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.whiteChars.discard("\n")
+        self.set_whitespace_chars(self.whiteChars, copy_defaults=False)
+        self.errmsg = "Expected end of line"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc < len(instring):
+            if instring[loc] == "\n":
+                return loc + 1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc + 1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+
+class StringStart(PositionToken):
+    """Matches if current position is at the beginning of the parse
+    string
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse(instring, 0):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class StringEnd(PositionToken):
+    """
+    Matches if current position is at the end of the parse string
+    """
+
+    def __init__(self):
+        super().__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc + 1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+
+class WordStart(PositionToken):
+    """Matches if the current position is at the beginning of a
+    :class:`Word`, and is not preceded by any character in a given
+    set of ``word_chars`` (default= ``printables``). To emulate the
+    ``\b`` behavior of regular expressions, use
+    ``WordStart(alphanums)``. ``WordStart`` will also match at
+    the beginning of the string being parsed, or at the beginning of
+    a line.
+    """
+
+    def __init__(self, word_chars: str = printables, *, wordChars: str = printables):
+        wordChars = word_chars if wordChars == printables else wordChars
+        super().__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc != 0:
+            if (
+                instring[loc - 1] in self.wordChars
+                or instring[loc] not in self.wordChars
+            ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class WordEnd(PositionToken):
+    """Matches if the current position is at the end of a :class:`Word`,
+    and is not followed by any character in a given set of ``word_chars``
+    (default= ``printables``). To emulate the ``\b`` behavior of
+    regular expressions, use ``WordEnd(alphanums)``. ``WordEnd``
+    will also match at the end of the string being parsed, or at the end
+    of a line.
+    """
+
+    def __init__(self, word_chars: str = printables, *, wordChars: str = printables):
+        wordChars = word_chars if wordChars == printables else wordChars
+        super().__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True):
+        instrlen = len(instring)
+        if instrlen > 0 and loc < instrlen:
+            if (
+                instring[loc] in self.wordChars
+                or instring[loc - 1] not in self.wordChars
+            ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """Abstract subclass of ParserElement, for combining and
+    post-processing parsed tokens.
+    """
+
+    def __init__(self, exprs: typing.Iterable[ParserElement], savelist: bool = False):
+        super().__init__(savelist)
+        self.exprs: List[ParserElement]
+        if isinstance(exprs, _generatorType):
+            exprs = list(exprs)
+
+        if isinstance(exprs, str_type):
+            self.exprs = [self._literalStringClass(exprs)]
+        elif isinstance(exprs, ParserElement):
+            self.exprs = [exprs]
+        elif isinstance(exprs, Iterable):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if any(isinstance(expr, str_type) for expr in exprs):
+                exprs = (
+                    self._literalStringClass(e) if isinstance(e, str_type) else e
+                    for e in exprs
+                )
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list(exprs)
+            except TypeError:
+                self.exprs = [exprs]
+        self.callPreparse = False
+
+    def recurse(self) -> Sequence[ParserElement]:
+        return self.exprs[:]
+
+    def append(self, other) -> ParserElement:
+        self.exprs.append(other)
+        self._defaultName = None
+        return self
+
+    def leave_whitespace(self, recursive: bool = True) -> ParserElement:
+        """
+        Extends ``leave_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on
+           all contained expressions.
+        """
+        super().leave_whitespace(recursive)
+
+        if recursive:
+            self.exprs = [e.copy() for e in self.exprs]
+            for e in self.exprs:
+                e.leave_whitespace(recursive)
+        return self
+
+    def ignore_whitespace(self, recursive: bool = True) -> ParserElement:
+        """
+        Extends ``ignore_whitespace`` defined in base class, and also invokes ``leave_whitespace`` on
+           all contained expressions.
+        """
+        super().ignore_whitespace(recursive)
+        if recursive:
+            self.exprs = [e.copy() for e in self.exprs]
+            for e in self.exprs:
+                e.ignore_whitespace(recursive)
+        return self
+
+    def ignore(self, other) -> ParserElement:
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                super().ignore(other)
+                for e in self.exprs:
+                    e.ignore(self.ignoreExprs[-1])
+        else:
+            super().ignore(other)
+            for e in self.exprs:
+                e.ignore(self.ignoreExprs[-1])
+        return self
+
+    def _generateDefaultName(self):
+        return "{}:({})".format(self.__class__.__name__, str(self.exprs))
+
+    def streamline(self) -> ParserElement:
+        if self.streamlined:
+            return self
+
+        super().streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested :class:`And`'s of the form ``And(And(And(a, b), c), d)`` to ``And(a, b, c, d)``
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for :class:`Or`'s and :class:`MatchFirst`'s)
+        if len(self.exprs) == 2:
+            other = self.exprs[0]
+            if (
+                isinstance(other, self.__class__)
+                and not other.parseAction
+                and other.resultsName is None
+                and not other.debug
+            ):
+                self.exprs = other.exprs[:] + [self.exprs[1]]
+                self._defaultName = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if (
+                isinstance(other, self.__class__)
+                and not other.parseAction
+                and other.resultsName is None
+                and not other.debug
+            ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self._defaultName = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError |= other.mayIndexError
+
+        self.errmsg = "Expected " + str(self)
+
+        return self
+
+    def validate(self, validateTrace=None) -> None:
+        tmp = (validateTrace if validateTrace is not None else [])[:] + [self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self._checkRecursion([])
+
+    def copy(self) -> ParserElement:
+        ret = super().copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (
+            __diag__.warn_ungrouped_named_tokens_in_collection
+            and Diagnostics.warn_ungrouped_named_tokens_in_collection
+            not in self.suppress_warnings_
+        ):
+            for e in self.exprs:
+                if (
+                    isinstance(e, ParserElement)
+                    and e.resultsName
+                    and Diagnostics.warn_ungrouped_named_tokens_in_collection
+                    not in e.suppress_warnings_
+                ):
+                    warnings.warn(
+                        "{}: setting results name {!r} on {} expression "
+                        "collides with {!r} on contained expression".format(
+                            "warn_ungrouped_named_tokens_in_collection",
+                            name,
+                            type(self).__name__,
+                            e.resultsName,
+                        ),
+                        stacklevel=3,
+                    )
+
+        return super()._setResultsName(name, listAllMatches)
+
+    ignoreWhitespace = ignore_whitespace
+    leaveWhitespace = leave_whitespace
+
+
+class And(ParseExpression):
+    """
+    Requires all given :class:`ParseExpression` s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the ``'+'`` operator.
+    May also be constructed using the ``'-'`` operator, which will
+    suppress backtracking.
+
+    Example::
+
+        integer = Word(nums)
+        name_expr = Word(alphas)[1, ...]
+
+        expr = And([integer("id"), name_expr("name"), integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super().__init__(*args, **kwargs)
+            self.leave_whitespace()
+
+        def _generateDefaultName(self):
+            return "-"
+
+    def __init__(
+        self, exprs_arg: typing.Iterable[ParserElement], savelist: bool = True
+    ):
+        exprs: List[ParserElement] = list(exprs_arg)
+        if exprs and Ellipsis in exprs:
+            tmp = []
+            for i, expr in enumerate(exprs):
+                if expr is Ellipsis:
+                    if i < len(exprs) - 1:
+                        skipto_arg: ParserElement = (Empty() + exprs[i + 1]).exprs[-1]
+                        tmp.append(SkipTo(skipto_arg)("_skipped*"))
+                    else:
+                        raise Exception(
+                            "cannot construct And with sequence ending in ..."
+                        )
+                else:
+                    tmp.append(expr)
+            exprs[:] = tmp
+        super().__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+            if not isinstance(self.exprs[0], White):
+                self.set_whitespace_chars(
+                    self.exprs[0].whiteChars,
+                    copy_defaults=self.exprs[0].copyDefaultWhiteChars,
+                )
+                self.skipWhitespace = self.exprs[0].skipWhitespace
+            else:
+                self.skipWhitespace = False
+        else:
+            self.mayReturnEmpty = True
+        self.callPreparse = True
+
+    def streamline(self) -> ParserElement:
+        # collapse any _PendingSkip's
+        if self.exprs:
+            if any(
+                isinstance(e, ParseExpression)
+                and e.exprs
+                and isinstance(e.exprs[-1], _PendingSkip)
+                for e in self.exprs[:-1]
+            ):
+                for i, e in enumerate(self.exprs[:-1]):
+                    if e is None:
+                        continue
+                    if (
+                        isinstance(e, ParseExpression)
+                        and e.exprs
+                        and isinstance(e.exprs[-1], _PendingSkip)
+                    ):
+                        e.exprs[-1] = e.exprs[-1] + self.exprs[i + 1]
+                        self.exprs[i + 1] = None
+                self.exprs = [e for e in self.exprs if e is not None]
+
+        super().streamline()
+
+        # link any IndentedBlocks to the prior expression
+        for prev, cur in zip(self.exprs, self.exprs[1:]):
+            # traverse cur or any first embedded expr of cur looking for an IndentedBlock
+            # (but watch out for recursive grammar)
+            seen = set()
+            while cur:
+                if id(cur) in seen:
+                    break
+                seen.add(id(cur))
+                if isinstance(cur, IndentedBlock):
+                    prev.add_parse_action(
+                        lambda s, l, t, cur_=cur: setattr(
+                            cur_, "parent_anchor", col(l, s)
+                        )
+                    )
+                    break
+                subs = cur.recurse()
+                cur = next(iter(subs), None)
+
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        # pass False as callPreParse arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse(
+            instring, loc, doActions, callPreParse=False
+        )
+        errorStop = False
+        for e in self.exprs[1:]:
+            # if isinstance(e, And._ErrorStop):
+            if type(e) is And._ErrorStop:
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse(instring, loc, doActions)
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(
+                        instring, len(instring), self.errmsg, self
+                    )
+            else:
+                loc, exprtokens = e._parse(instring, loc, doActions)
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other):
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        return self.append(other)  # And([self, other])
+
+    def _checkRecursion(self, parseElementList):
+        subRecCheckList = parseElementList[:] + [self]
+        for e in self.exprs:
+            e._checkRecursion(subRecCheckList)
+            if not e.mayReturnEmpty:
+                break
+
+    def _generateDefaultName(self):
+        inner = " ".join(str(e) for e in self.exprs)
+        # strip off redundant inner {}'s
+        while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}":
+            inner = inner[1:-1]
+        return "{" + inner + "}"
+
+
+class Or(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    two expressions match, the expression that matches the longest
+    string will be used. May be constructed using the ``'^'``
+    operator.
+
+    Example::
+
+        # construct Or using '^' operator
+
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.search_string("123 3.1416 789"))
+
+    prints::
+
+        [['123'], ['3.1416'], ['789']]
+    """
+
+    def __init__(self, exprs: typing.Iterable[ParserElement], savelist: bool = False):
+        super().__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+            self.skipWhitespace = all(e.skipWhitespace for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self) -> ParserElement:
+        super().streamline()
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+            self.skipWhitespace = all(
+                e.skipWhitespace and not isinstance(e, White) for e in self.exprs
+            )
+        else:
+            self.saveAsList = False
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        fatals = []
+        if all(e.callPreparse for e in self.exprs):
+            loc = self.preParse(instring, loc)
+        for e in self.exprs:
+            try:
+                loc2 = e.try_parse(instring, loc, raise_fatal=True)
+            except ParseFatalException as pfe:
+                pfe.__traceback__ = None
+                pfe.parserElement = e
+                fatals.append(pfe)
+                maxException = None
+                maxExcLoc = -1
+            except ParseException as err:
+                if not fatals:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(
+                        instring, len(instring), e.errmsg, self
+                    )
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            # re-evaluate all matches in descending order of length of match, in case attached actions
+            # might change whether or how much they match of the input.
+            matches.sort(key=itemgetter(0), reverse=True)
+
+            if not doActions:
+                # no further conditions or parse actions to change the selection of
+                # alternative, so the first match will be the best match
+                best_expr = matches[0][1]
+                return best_expr._parse(instring, loc, doActions)
+
+            longest = -1, None
+            for loc1, expr1 in matches:
+                if loc1 <= longest[0]:
+                    # already have a longer match than this one will deliver, we are done
+                    return longest
+
+                try:
+                    loc2, toks = expr1._parse(instring, loc, doActions)
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+                else:
+                    if loc2 >= loc1:
+                        return loc2, toks
+                    # didn't match as much as before
+                    elif loc2 > longest[0]:
+                        longest = loc2, toks
+
+            if longest != (-1, None):
+                return longest
+
+        if fatals:
+            if len(fatals) > 1:
+                fatals.sort(key=lambda e: -e.loc)
+                if fatals[0].loc == fatals[1].loc:
+                    fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement))))
+            max_fatal = fatals[0]
+            raise max_fatal
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(
+                instring, loc, "no defined alternatives to match", self
+            )
+
+    def __ixor__(self, other):
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        return self.append(other)  # Or([self, other])
+
+    def _generateDefaultName(self):
+        return "{" + " ^ ".join(str(e) for e in self.exprs) + "}"
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (
+            __diag__.warn_multiple_tokens_in_named_alternation
+            and Diagnostics.warn_multiple_tokens_in_named_alternation
+            not in self.suppress_warnings_
+        ):
+            if any(
+                isinstance(e, And)
+                and Diagnostics.warn_multiple_tokens_in_named_alternation
+                not in e.suppress_warnings_
+                for e in self.exprs
+            ):
+                warnings.warn(
+                    "{}: setting results name {!r} on {} expression "
+                    "will return a list of all parsed tokens in an And alternative, "
+                    "in prior versions only the first token was returned; enclose "
+                    "contained argument in Group".format(
+                        "warn_multiple_tokens_in_named_alternation",
+                        name,
+                        type(self).__name__,
+                    ),
+                    stacklevel=3,
+                )
+
+        return super()._setResultsName(name, listAllMatches)
+
+
+class MatchFirst(ParseExpression):
+    """Requires that at least one :class:`ParseExpression` is found. If
+    more than one expression matches, the first one listed is the one that will
+    match. May be constructed using the ``'|'`` operator.
+
+    Example::
+
+        # construct MatchFirst using '|' operator
+
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.search_string("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.search_string("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+
+    def __init__(self, exprs: typing.Iterable[ParserElement], savelist: bool = False):
+        super().__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+            self.skipWhitespace = all(e.skipWhitespace for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def streamline(self) -> ParserElement:
+        if self.streamlined:
+            return self
+
+        super().streamline()
+        if self.exprs:
+            self.saveAsList = any(e.saveAsList for e in self.exprs)
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+            self.skipWhitespace = all(
+                e.skipWhitespace and not isinstance(e, White) for e in self.exprs
+            )
+        else:
+            self.saveAsList = False
+            self.mayReturnEmpty = True
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        maxExcLoc = -1
+        maxException = None
+
+        for e in self.exprs:
+            try:
+                return e._parse(
+                    instring,
+                    loc,
+                    doActions,
+                )
+            except ParseFatalException as pfe:
+                pfe.__traceback__ = None
+                pfe.parserElement = e
+                raise
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(
+                        instring, len(instring), e.errmsg, self
+                    )
+                    maxExcLoc = len(instring)
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(
+                instring, loc, "no defined alternatives to match", self
+            )
+
+    def __ior__(self, other):
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        return self.append(other)  # MatchFirst([self, other])
+
+    def _generateDefaultName(self):
+        return "{" + " | ".join(str(e) for e in self.exprs) + "}"
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (
+            __diag__.warn_multiple_tokens_in_named_alternation
+            and Diagnostics.warn_multiple_tokens_in_named_alternation
+            not in self.suppress_warnings_
+        ):
+            if any(
+                isinstance(e, And)
+                and Diagnostics.warn_multiple_tokens_in_named_alternation
+                not in e.suppress_warnings_
+                for e in self.exprs
+            ):
+                warnings.warn(
+                    "{}: setting results name {!r} on {} expression "
+                    "will return a list of all parsed tokens in an And alternative, "
+                    "in prior versions only the first token was returned; enclose "
+                    "contained argument in Group".format(
+                        "warn_multiple_tokens_in_named_alternation",
+                        name,
+                        type(self).__name__,
+                    ),
+                    stacklevel=3,
+                )
+
+        return super()._setResultsName(name, listAllMatches)
+
+
+class Each(ParseExpression):
+    """Requires all given :class:`ParseExpression` s to be found, but in
+    any order. Expressions may be separated by whitespace.
+
+    May be constructed using the ``'&'`` operator.
+
+    Example::
+
+        color = one_of("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = one_of("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Opt(color_attr) & Opt(size_attr)
+
+        shape_spec.run_tests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+
+    prints::
+
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+
+    def __init__(self, exprs: typing.Iterable[ParserElement], savelist: bool = True):
+        super().__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+        self.skipWhitespace = True
+        self.initExprGroups = True
+        self.saveAsList = True
+
+    def streamline(self) -> ParserElement:
+        super().streamline()
+        if self.exprs:
+            self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.initExprGroups:
+            self.opt1map = dict(
+                (id(e.expr), e) for e in self.exprs if isinstance(e, Opt)
+            )
+            opt1 = [e.expr for e in self.exprs if isinstance(e, Opt)]
+            opt2 = [
+                e
+                for e in self.exprs
+                if e.mayReturnEmpty and not isinstance(e, (Opt, Regex, ZeroOrMore))
+            ]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [
+                e.expr.set_results_name(e.resultsName, list_all_matches=True)
+                for e in self.exprs
+                if isinstance(e, _MultipleMatch)
+            ]
+            self.multirequired = [
+                e.expr.set_results_name(e.resultsName, list_all_matches=True)
+                for e in self.exprs
+                if isinstance(e, OneOrMore)
+            ]
+            self.required = [
+                e for e in self.exprs if not isinstance(e, (Opt, ZeroOrMore, OneOrMore))
+            ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt = self.optionals[:]
+        multis = self.multioptionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        failed = []
+        fatals = []
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + multis
+            failed.clear()
+            fatals.clear()
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.try_parse(instring, tmpLoc, raise_fatal=True)
+                except ParseFatalException as pfe:
+                    pfe.__traceback__ = None
+                    pfe.parserElement = e
+                    fatals.append(pfe)
+                    failed.append(e)
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e), e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        # look for any ParseFatalExceptions
+        if fatals:
+            if len(fatals) > 1:
+                fatals.sort(key=lambda e: -e.loc)
+                if fatals[0].loc == fatals[1].loc:
+                    fatals.sort(key=lambda e: (-e.loc, -len(str(e.parserElement))))
+            max_fatal = fatals[0]
+            raise max_fatal
+
+        if tmpReqd:
+            missing = ", ".join([str(e) for e in tmpReqd])
+            raise ParseException(
+                instring,
+                loc,
+                "Missing one or more required elements ({})".format(missing),
+            )
+
+        # add any unmatched Opts, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e, Opt) and e.expr in tmpOpt]
+
+        total_results = ParseResults([])
+        for e in matchOrder:
+            loc, results = e._parse(instring, loc, doActions)
+            total_results += results
+
+        return loc, total_results
+
+    def _generateDefaultName(self):
+        return "{" + " & ".join(str(e) for e in self.exprs) + "}"
+
+
+class ParseElementEnhance(ParserElement):
+    """Abstract subclass of :class:`ParserElement`, for combining and
+    post-processing parsed tokens.
+    """
+
+    def __init__(self, expr: Union[ParserElement, str], savelist: bool = False):
+        super().__init__(savelist)
+        if isinstance(expr, str_type):
+            if issubclass(self._literalStringClass, Token):
+                expr = self._literalStringClass(expr)
+            elif issubclass(type(self), self._literalStringClass):
+                expr = Literal(expr)
+            else:
+                expr = self._literalStringClass(Literal(expr))
+        self.expr = expr
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.set_whitespace_chars(
+                expr.whiteChars, copy_defaults=expr.copyDefaultWhiteChars
+            )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def recurse(self) -> Sequence[ParserElement]:
+        return [self.expr] if self.expr is not None else []
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.expr is not None:
+            return self.expr._parse(instring, loc, doActions, callPreParse=False)
+        else:
+            raise ParseException(instring, loc, "No expression defined", self)
+
+    def leave_whitespace(self, recursive: bool = True) -> ParserElement:
+        super().leave_whitespace(recursive)
+
+        if recursive:
+            self.expr = self.expr.copy()
+            if self.expr is not None:
+                self.expr.leave_whitespace(recursive)
+        return self
+
+    def ignore_whitespace(self, recursive: bool = True) -> ParserElement:
+        super().ignore_whitespace(recursive)
+
+        if recursive:
+            self.expr = self.expr.copy()
+            if self.expr is not None:
+                self.expr.ignore_whitespace(recursive)
+        return self
+
+    def ignore(self, other) -> ParserElement:
+        if isinstance(other, Suppress):
+            if other not in self.ignoreExprs:
+                super().ignore(other)
+                if self.expr is not None:
+                    self.expr.ignore(self.ignoreExprs[-1])
+        else:
+            super().ignore(other)
+            if self.expr is not None:
+                self.expr.ignore(self.ignoreExprs[-1])
+        return self
+
+    def streamline(self) -> ParserElement:
+        super().streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def _checkRecursion(self, parseElementList):
+        if self in parseElementList:
+            raise RecursiveGrammarException(parseElementList + [self])
+        subRecCheckList = parseElementList[:] + [self]
+        if self.expr is not None:
+            self.expr._checkRecursion(subRecCheckList)
+
+    def validate(self, validateTrace=None) -> None:
+        if validateTrace is None:
+            validateTrace = []
+        tmp = validateTrace[:] + [self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self._checkRecursion([])
+
+    def _generateDefaultName(self):
+        return "{}:({})".format(self.__class__.__name__, str(self.expr))
+
+    ignoreWhitespace = ignore_whitespace
+    leaveWhitespace = leave_whitespace
+
+
+class IndentedBlock(ParseElementEnhance):
+    """
+    Expression to match one or more expressions at a given indentation level.
+    Useful for parsing text where structure is implied by indentation (like Python source code).
+    """
+
+    class _Indent(Empty):
+        def __init__(self, ref_col: int):
+            super().__init__()
+            self.errmsg = "expected indent at column {}".format(ref_col)
+            self.add_condition(lambda s, l, t: col(l, s) == ref_col)
+
+    class _IndentGreater(Empty):
+        def __init__(self, ref_col: int):
+            super().__init__()
+            self.errmsg = "expected indent at column greater than {}".format(ref_col)
+            self.add_condition(lambda s, l, t: col(l, s) > ref_col)
+
+    def __init__(
+        self, expr: ParserElement, *, recursive: bool = False, grouped: bool = True
+    ):
+        super().__init__(expr, savelist=True)
+        # if recursive:
+        #     raise NotImplementedError("IndentedBlock with recursive is not implemented")
+        self._recursive = recursive
+        self._grouped = grouped
+        self.parent_anchor = 1
+
+    def parseImpl(self, instring, loc, doActions=True):
+        # advance parse position to non-whitespace by using an Empty()
+        # this should be the column to be used for all subsequent indented lines
+        anchor_loc = Empty().preParse(instring, loc)
+
+        # see if self.expr matches at the current location - if not it will raise an exception
+        # and no further work is necessary
+        self.expr.try_parse(instring, anchor_loc, doActions)
+
+        indent_col = col(anchor_loc, instring)
+        peer_detect_expr = self._Indent(indent_col)
+
+        inner_expr = Empty() + peer_detect_expr + self.expr
+        if self._recursive:
+            sub_indent = self._IndentGreater(indent_col)
+            nested_block = IndentedBlock(
+                self.expr, recursive=self._recursive, grouped=self._grouped
+            )
+            nested_block.set_debug(self.debug)
+            nested_block.parent_anchor = indent_col
+            inner_expr += Opt(sub_indent + nested_block)
+
+        inner_expr.set_name(f"inner {hex(id(inner_expr))[-4:].upper()}@{indent_col}")
+        block = OneOrMore(inner_expr)
+
+        trailing_undent = self._Indent(self.parent_anchor) | StringEnd()
+
+        if self._grouped:
+            wrapper = Group
+        else:
+            wrapper = lambda expr: expr
+        return (wrapper(block) + Optional(trailing_undent)).parseImpl(
+            instring, anchor_loc, doActions
+        )
+
+
+class AtStringStart(ParseElementEnhance):
+    """Matches if expression matches at the beginning of the parse
+    string::
+
+        AtStringStart(Word(nums)).parse_string("123")
+        # prints ["123"]
+
+        AtStringStart(Word(nums)).parse_string("    123")
+        # raises ParseException
+    """
+
+    def __init__(self, expr: Union[ParserElement, str]):
+        super().__init__(expr)
+        self.callPreparse = False
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if loc != 0:
+            raise ParseException(instring, loc, "not found at string start")
+        return super().parseImpl(instring, loc, doActions)
+
+
+class AtLineStart(ParseElementEnhance):
+    r"""Matches if an expression matches at the beginning of a line within
+    the parse string
+
+    Example::
+
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (AtLineStart('AAA') + restOfLine).search_string(test):
+            print(t)
+
+    prints::
+
+        ['AAA', ' this line']
+        ['AAA', ' and this line']
+
+    """
+
+    def __init__(self, expr: Union[ParserElement, str]):
+        super().__init__(expr)
+        self.callPreparse = False
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if col(loc, instring) != 1:
+            raise ParseException(instring, loc, "not found at line start")
+        return super().parseImpl(instring, loc, doActions)
+
+
+class FollowedBy(ParseElementEnhance):
+    """Lookahead matching of the given parse expression.
+    ``FollowedBy`` does *not* advance the parsing position within
+    the input string, it only verifies that the specified parse
+    expression matches at the current position.  ``FollowedBy``
+    always returns a null token list. If any results names are defined
+    in the lookahead expression, those *will* be returned for access by
+    name.
+
+    Example::
+
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join))
+
+        attr_expr[1, ...].parse_string("shape: SQUARE color: BLACK posn: upper left").pprint()
+
+    prints::
+
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+
+    def __init__(self, expr: Union[ParserElement, str]):
+        super().__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        # by using self._expr.parse and deleting the contents of the returned ParseResults list
+        # we keep any named results that were defined in the FollowedBy expression
+        _, ret = self.expr._parse(instring, loc, doActions=doActions)
+        del ret[:]
+
+        return loc, ret
+
+
+class PrecededBy(ParseElementEnhance):
+    """Lookbehind matching of the given parse expression.
+    ``PrecededBy`` does not advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    matches prior to the current position.  ``PrecededBy`` always
+    returns a null token list, but if a results name is defined on the
+    given expression, it is returned.
+
+    Parameters:
+
+    - expr - expression that must match prior to the current parse
+      location
+    - retreat - (default= ``None``) - (int) maximum number of characters
+      to lookbehind prior to the current parse location
+
+    If the lookbehind expression is a string, :class:`Literal`,
+    :class:`Keyword`, or a :class:`Word` or :class:`CharsNotIn`
+    with a specified exact or maximum length, then the retreat
+    parameter is not required. Otherwise, retreat must be specified to
+    give a maximum number of characters to look back from
+    the current parse position for a lookbehind match.
+
+    Example::
+
+        # VB-style variable names with type prefixes
+        int_var = PrecededBy("#") + pyparsing_common.identifier
+        str_var = PrecededBy("$") + pyparsing_common.identifier
+
+    """
+
+    def __init__(
+        self, expr: Union[ParserElement, str], retreat: typing.Optional[int] = None
+    ):
+        super().__init__(expr)
+        self.expr = self.expr().leave_whitespace()
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.exact = False
+        if isinstance(expr, str_type):
+            retreat = len(expr)
+            self.exact = True
+        elif isinstance(expr, (Literal, Keyword)):
+            retreat = expr.matchLen
+            self.exact = True
+        elif isinstance(expr, (Word, CharsNotIn)) and expr.maxLen != _MAX_INT:
+            retreat = expr.maxLen
+            self.exact = True
+        elif isinstance(expr, PositionToken):
+            retreat = 0
+            self.exact = True
+        self.retreat = retreat
+        self.errmsg = "not preceded by " + str(expr)
+        self.skipWhitespace = False
+        self.parseAction.append(lambda s, l, t: t.__delitem__(slice(None, None)))
+
+    def parseImpl(self, instring, loc=0, doActions=True):
+        if self.exact:
+            if loc < self.retreat:
+                raise ParseException(instring, loc, self.errmsg)
+            start = loc - self.retreat
+            _, ret = self.expr._parse(instring, start)
+        else:
+            # retreat specified a maximum lookbehind window, iterate
+            test_expr = self.expr + StringEnd()
+            instring_slice = instring[max(0, loc - self.retreat) : loc]
+            last_expr = ParseException(instring, loc, self.errmsg)
+            for offset in range(1, min(loc, self.retreat + 1) + 1):
+                try:
+                    # print('trying', offset, instring_slice, repr(instring_slice[loc - offset:]))
+                    _, ret = test_expr._parse(
+                        instring_slice, len(instring_slice) - offset
+                    )
+                except ParseBaseException as pbe:
+                    last_expr = pbe
+                else:
+                    break
+            else:
+                raise last_expr
+        return loc, ret
+
+
+class Located(ParseElementEnhance):
+    """
+    Decorates a returned token with its starting and ending
+    locations in the input string.
+
+    This helper adds the following results names:
+
+    - ``locn_start`` - location where matched expression begins
+    - ``locn_end`` - location where matched expression ends
+    - ``value`` - the actual parsed results
+
+    Be careful if the input text contains ``<TAB>`` characters, you
+    may want to call :class:`ParserElement.parse_with_tabs`
+
+    Example::
+
+        wd = Word(alphas)
+        for match in Located(wd).search_string("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+
+    prints::
+
+        [0, ['ljsdf'], 5]
+        [8, ['lksdjjf'], 15]
+        [18, ['lkkjj'], 23]
+
+    """
+
+    def parseImpl(self, instring, loc, doActions=True):
+        start = loc
+        loc, tokens = self.expr._parse(instring, start, doActions, callPreParse=False)
+        ret_tokens = ParseResults([start, tokens, loc])
+        ret_tokens["locn_start"] = start
+        ret_tokens["value"] = tokens
+        ret_tokens["locn_end"] = loc
+        if self.resultsName:
+            # must return as a list, so that the name will be attached to the complete group
+            return loc, [ret_tokens]
+        else:
+            return loc, ret_tokens
+
+
+class NotAny(ParseElementEnhance):
+    """
+    Lookahead to disallow matching with the given parse expression.
+    ``NotAny`` does *not* advance the parsing position within the
+    input string, it only verifies that the specified parse expression
+    does *not* match at the current position.  Also, ``NotAny`` does
+    *not* skip over leading whitespace. ``NotAny`` always returns
+    a null token list.  May be constructed using the ``'~'`` operator.
+
+    Example::
+
+        AND, OR, NOT = map(CaselessKeyword, "AND OR NOT".split())
+
+        # take care not to mistake keywords for identifiers
+        ident = ~(AND | OR | NOT) + Word(alphas)
+        boolean_term = Opt(NOT) + ident
+
+        # very crude boolean expression - to support parenthesis groups and
+        # operation hierarchy, use infix_notation
+        boolean_expr = boolean_term + ((AND | OR) + boolean_term)[...]
+
+        # integers that are followed by "." are actually floats
+        integer = Word(nums) + ~Char(".")
+    """
+
+    def __init__(self, expr: Union[ParserElement, str]):
+        super().__init__(expr)
+        # do NOT use self.leave_whitespace(), don't want to propagate to exprs
+        # self.leave_whitespace()
+        self.skipWhitespace = False
+
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, " + str(self.expr)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if self.expr.can_parse_next(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def _generateDefaultName(self):
+        return "~{" + str(self.expr) + "}"
+
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__(
+        self,
+        expr: ParserElement,
+        stop_on: typing.Optional[Union[ParserElement, str]] = None,
+        *,
+        stopOn: typing.Optional[Union[ParserElement, str]] = None,
+    ):
+        super().__init__(expr)
+        stopOn = stopOn or stop_on
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, str_type):
+            ender = self._literalStringClass(ender)
+        self.stopOn(ender)
+
+    def stopOn(self, ender) -> ParserElement:
+        if isinstance(ender, str_type):
+            ender = self._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+        return self
+
+    def parseImpl(self, instring, loc, doActions=True):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse(instring, loc, doActions)
+        try:
+            hasIgnoreExprs = not not self.ignoreExprs
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables(instring, loc)
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse(instring, preloc, doActions)
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException, IndexError):
+            pass
+
+        return loc, tokens
+
+    def _setResultsName(self, name, listAllMatches=False):
+        if (
+            __diag__.warn_ungrouped_named_tokens_in_collection
+            and Diagnostics.warn_ungrouped_named_tokens_in_collection
+            not in self.suppress_warnings_
+        ):
+            for e in [self.expr] + self.expr.recurse():
+                if (
+                    isinstance(e, ParserElement)
+                    and e.resultsName
+                    and Diagnostics.warn_ungrouped_named_tokens_in_collection
+                    not in e.suppress_warnings_
+                ):
+                    warnings.warn(
+                        "{}: setting results name {!r} on {} expression "
+                        "collides with {!r} on contained expression".format(
+                            "warn_ungrouped_named_tokens_in_collection",
+                            name,
+                            type(self).__name__,
+                            e.resultsName,
+                        ),
+                        stacklevel=3,
+                    )
+
+        return super()._setResultsName(name, listAllMatches)
+
+
+class OneOrMore(_MultipleMatch):
+    """
+    Repetition of one or more of the given expression.
+
+    Parameters:
+    - expr - expression that must match one or more times
+    - stop_on - (default= ``None``) - expression for a terminating sentinel
+         (only required if the sentinel would ordinarily match the repetition
+         expression)
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).set_parse_action(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        attr_expr[1, ...].parse_string(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stop_on attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join))
+        OneOrMore(attr_expr).parse_string(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+
+        # could also be written as
+        (attr_expr * (1,)).parse_string(text).pprint()
+    """
+
+    def _generateDefaultName(self):
+        return "{" + str(self.expr) + "}..."
+
+
+class ZeroOrMore(_MultipleMatch):
+    """
+    Optional repetition of zero or more of the given expression.
+
+    Parameters:
+    - ``expr`` - expression that must match zero or more times
+    - ``stop_on`` - expression for a terminating sentinel
+      (only required if the sentinel would ordinarily match the repetition
+      expression) - (default= ``None``)
+
+    Example: similar to :class:`OneOrMore`
+    """
+
+    def __init__(
+        self,
+        expr: ParserElement,
+        stop_on: typing.Optional[Union[ParserElement, str]] = None,
+        *,
+        stopOn: typing.Optional[Union[ParserElement, str]] = None,
+    ):
+        super().__init__(expr, stopOn=stopOn or stop_on)
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        try:
+            return super().parseImpl(instring, loc, doActions)
+        except (ParseException, IndexError):
+            return loc, ParseResults([], name=self.resultsName)
+
+    def _generateDefaultName(self):
+        return "[" + str(self.expr) + "]..."
+
+
+class _NullToken:
+    def __bool__(self):
+        return False
+
+    def __str__(self):
+        return ""
+
+
+class Opt(ParseElementEnhance):
+    """
+    Optional matching of the given expression.
+
+    Parameters:
+    - ``expr`` - expression that must match zero or more times
+    - ``default`` (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Opt('-' + Word(nums, exact=4)))
+        zip.run_tests('''
+            # traditional ZIP code
+            12345
+
+            # ZIP+4 form
+            12101-0001
+
+            # invalid ZIP
+            98765-
+            ''')
+
+    prints::
+
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+
+    __optionalNotMatched = _NullToken()
+
+    def __init__(
+        self, expr: Union[ParserElement, str], default: Any = __optionalNotMatched
+    ):
+        super().__init__(expr, savelist=False)
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl(self, instring, loc, doActions=True):
+        self_expr = self.expr
+        try:
+            loc, tokens = self_expr._parse(instring, loc, doActions, callPreParse=False)
+        except (ParseException, IndexError):
+            default_value = self.defaultValue
+            if default_value is not self.__optionalNotMatched:
+                if self_expr.resultsName:
+                    tokens = ParseResults([default_value])
+                    tokens[self_expr.resultsName] = default_value
+                else:
+                    tokens = [default_value]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def _generateDefaultName(self):
+        inner = str(self.expr)
+        # strip off redundant inner {}'s
+        while len(inner) > 1 and inner[0 :: len(inner) - 1] == "{}":
+            inner = inner[1:-1]
+        return "[" + inner + "]"
+
+
+Optional = Opt
+
+
+class SkipTo(ParseElementEnhance):
+    """
+    Token for skipping over all undefined text until the matched
+    expression is found.
+
+    Parameters:
+    - ``expr`` - target expression marking the end of the data to be skipped
+    - ``include`` - if ``True``, the target expression is also parsed
+      (the skipped text and target expression are returned as a 2-element
+      list) (default= ``False``).
+    - ``ignore`` - (default= ``None``) used to define grammars (typically quoted strings and
+      comments) that might contain false matches to the target expression
+    - ``fail_on`` - (default= ``None``) define expressions that are not allowed to be
+      included in the skipped test; if found before the target expression is found,
+      the :class:`SkipTo` is not a match
+
+    Example::
+
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quoted_string)
+        string_data.set_parse_action(token_map(str.strip))
+        ticket_expr = (integer("issue_num") + SEP
+                      + string_data("sev") + SEP
+                      + string_data("desc") + SEP
+                      + integer("days_open"))
+
+        for tkt in ticket_expr.search_string(report):
+            print tkt.dump()
+
+    prints::
+
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: '6'
+        - desc: 'Intermittent system crash'
+        - issue_num: '101'
+        - sev: 'Critical'
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: '14'
+        - desc: "Spelling error on Login ('log|n')"
+        - issue_num: '94'
+        - sev: 'Cosmetic'
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: '47'
+        - desc: 'System slow when running too many reports'
+        - issue_num: '79'
+        - sev: 'Minor'
+    """
+
+    def __init__(
+        self,
+        other: Union[ParserElement, str],
+        include: bool = False,
+        ignore: bool = None,
+        fail_on: typing.Optional[Union[ParserElement, str]] = None,
+        *,
+        failOn: Union[ParserElement, str] = None,
+    ):
+        super().__init__(other)
+        failOn = failOn or fail_on
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.saveAsList = False
+        if isinstance(failOn, str_type):
+            self.failOn = self._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for " + str(self.expr)
+
+    def parseImpl(self, instring, loc, doActions=True):
+        startloc = loc
+        instrlen = len(instring)
+        self_expr_parse = self.expr._parse
+        self_failOn_canParseNext = (
+            self.failOn.canParseNext if self.failOn is not None else None
+        )
+        self_ignoreExpr_tryParse = (
+            self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+        )
+
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+
+            try:
+                self_expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+
+        if self.includeMatch:
+            loc, mat = self_expr_parse(instring, loc, doActions, callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+
+class Forward(ParseElementEnhance):
+    """
+    Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the ``Forward``
+    variable using the ``'<<'`` operator.
+
+    Note: take care when assigning to ``Forward`` not to overlook
+    precedence of operators.
+
+    Specifically, ``'|'`` has a lower precedence than ``'<<'``, so that::
+
+        fwd_expr << a | b | c
+
+    will actually be evaluated as::
+
+        (fwd_expr << a) | b | c
+
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the ``Forward``::
+
+        fwd_expr << (a | b | c)
+
+    Converting to use the ``'<<='`` operator instead will avoid this problem.
+
+    See :class:`ParseResults.pprint` for an example of a recursive
+    parser created using ``Forward``.
+    """
+
+    def __init__(self, other: typing.Optional[Union[ParserElement, str]] = None):
+        self.caller_frame = traceback.extract_stack(limit=2)[0]
+        super().__init__(other, savelist=False)
+        self.lshift_line = None
+
+    def __lshift__(self, other):
+        if hasattr(self, "caller_frame"):
+            del self.caller_frame
+        if isinstance(other, str_type):
+            other = self._literalStringClass(other)
+        self.expr = other
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.set_whitespace_chars(
+            self.expr.whiteChars, copy_defaults=self.expr.copyDefaultWhiteChars
+        )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        self.lshift_line = traceback.extract_stack(limit=2)[-2]
+        return self
+
+    def __ilshift__(self, other):
+        return self << other
+
+    def __or__(self, other):
+        caller_line = traceback.extract_stack(limit=2)[-2]
+        if (
+            __diag__.warn_on_match_first_with_lshift_operator
+            and caller_line == self.lshift_line
+            and Diagnostics.warn_on_match_first_with_lshift_operator
+            not in self.suppress_warnings_
+        ):
+            warnings.warn(
+                "using '<<' operator with '|' is probably an error, use '<<='",
+                stacklevel=2,
+            )
+        ret = super().__or__(other)
+        return ret
+
+    def __del__(self):
+        # see if we are getting dropped because of '=' reassignment of var instead of '<<=' or '<<'
+        if (
+            self.expr is None
+            and __diag__.warn_on_assignment_to_Forward
+            and Diagnostics.warn_on_assignment_to_Forward not in self.suppress_warnings_
+        ):
+            warnings.warn_explicit(
+                "Forward defined here but no expression attached later using '<<=' or '<<'",
+                UserWarning,
+                filename=self.caller_frame.filename,
+                lineno=self.caller_frame.lineno,
+            )
+
+    def parseImpl(self, instring, loc, doActions=True):
+        if (
+            self.expr is None
+            and __diag__.warn_on_parse_using_empty_Forward
+            and Diagnostics.warn_on_parse_using_empty_Forward
+            not in self.suppress_warnings_
+        ):
+            # walk stack until parse_string, scan_string, search_string, or transform_string is found
+            parse_fns = [
+                "parse_string",
+                "scan_string",
+                "search_string",
+                "transform_string",
+            ]
+            tb = traceback.extract_stack(limit=200)
+            for i, frm in enumerate(reversed(tb), start=1):
+                if frm.name in parse_fns:
+                    stacklevel = i + 1
+                    break
+            else:
+                stacklevel = 2
+            warnings.warn(
+                "Forward expression was never assigned a value, will not parse any input",
+                stacklevel=stacklevel,
+            )
+        if not ParserElement._left_recursion_enabled:
+            return super().parseImpl(instring, loc, doActions)
+        # ## Bounded Recursion algorithm ##
+        # Recursion only needs to be processed at ``Forward`` elements, since they are
+        # the only ones that can actually refer to themselves. The general idea is
+        # to handle recursion stepwise: We start at no recursion, then recurse once,
+        # recurse twice, ..., until more recursion offers no benefit (we hit the bound).
+        #
+        # The "trick" here is that each ``Forward`` gets evaluated in two contexts
+        # - to *match* a specific recursion level, and
+        # - to *search* the bounded recursion level
+        # and the two run concurrently. The *search* must *match* each recursion level
+        # to find the best possible match. This is handled by a memo table, which
+        # provides the previous match to the next level match attempt.
+        #
+        # See also "Left Recursion in Parsing Expression Grammars", Medeiros et al.
+        #
+        # There is a complication since we not only *parse* but also *transform* via
+        # actions: We do not want to run the actions too often while expanding. Thus,
+        # we expand using `doActions=False` and only run `doActions=True` if the next
+        # recursion level is acceptable.
+        with ParserElement.recursion_lock:
+            memo = ParserElement.recursion_memos
+            try:
+                # we are parsing at a specific recursion expansion - use it as-is
+                prev_loc, prev_result = memo[loc, self, doActions]
+                if isinstance(prev_result, Exception):
+                    raise prev_result
+                return prev_loc, prev_result.copy()
+            except KeyError:
+                act_key = (loc, self, True)
+                peek_key = (loc, self, False)
+                # we are searching for the best recursion expansion - keep on improving
+                # both `doActions` cases must be tracked separately here!
+                prev_loc, prev_peek = memo[peek_key] = (
+                    loc - 1,
+                    ParseException(
+                        instring, loc, "Forward recursion without base case", self
+                    ),
+                )
+                if doActions:
+                    memo[act_key] = memo[peek_key]
+                while True:
+                    try:
+                        new_loc, new_peek = super().parseImpl(instring, loc, False)
+                    except ParseException:
+                        # we failed before getting any match – do not hide the error
+                        if isinstance(prev_peek, Exception):
+                            raise
+                        new_loc, new_peek = prev_loc, prev_peek
+                    # the match did not get better: we are done
+                    if new_loc <= prev_loc:
+                        if doActions:
+                            # replace the match for doActions=False as well,
+                            # in case the action did backtrack
+                            prev_loc, prev_result = memo[peek_key] = memo[act_key]
+                            del memo[peek_key], memo[act_key]
+                            return prev_loc, prev_result.copy()
+                        del memo[peek_key]
+                        return prev_loc, prev_peek.copy()
+                    # the match did get better: see if we can improve further
+                    else:
+                        if doActions:
+                            try:
+                                memo[act_key] = super().parseImpl(instring, loc, True)
+                            except ParseException as e:
+                                memo[peek_key] = memo[act_key] = (new_loc, e)
+                                raise
+                        prev_loc, prev_peek = memo[peek_key] = new_loc, new_peek
+
+    def leave_whitespace(self, recursive: bool = True) -> ParserElement:
+        self.skipWhitespace = False
+        return self
+
+    def ignore_whitespace(self, recursive: bool = True) -> ParserElement:
+        self.skipWhitespace = True
+        return self
+
+    def streamline(self) -> ParserElement:
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate(self, validateTrace=None) -> None:
+        if validateTrace is None:
+            validateTrace = []
+
+        if self not in validateTrace:
+            tmp = validateTrace[:] + [self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self._checkRecursion([])
+
+    def _generateDefaultName(self):
+        # Avoid infinite recursion by setting a temporary _defaultName
+        self._defaultName = ": ..."
+
+        # Use the string representation of main expression.
+        retString = "..."
+        try:
+            if self.expr is not None:
+                retString = str(self.expr)[:1000]
+            else:
+                retString = "None"
+        finally:
+            return self.__class__.__name__ + ": " + retString
+
+    def copy(self) -> ParserElement:
+        if self.expr is not None:
+            return super().copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+    def _setResultsName(self, name, list_all_matches=False):
+        if (
+            __diag__.warn_name_set_on_empty_Forward
+            and Diagnostics.warn_name_set_on_empty_Forward
+            not in self.suppress_warnings_
+        ):
+            if self.expr is None:
+                warnings.warn(
+                    "{}: setting results name {!r} on {} expression "
+                    "that has no contained expression".format(
+                        "warn_name_set_on_empty_Forward", name, type(self).__name__
+                    ),
+                    stacklevel=3,
+                )
+
+        return super()._setResultsName(name, list_all_matches)
+
+    ignoreWhitespace = ignore_whitespace
+    leaveWhitespace = leave_whitespace
+
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of :class:`ParseExpression`, for converting parsed results.
+    """
+
+    def __init__(self, expr: Union[ParserElement, str], savelist=False):
+        super().__init__(expr)  # , savelist)
+        self.saveAsList = False
+
+
+class Combine(TokenConverter):
+    """Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the
+    input string; this can be disabled by specifying
+    ``'adjacent=False'`` in the constructor.
+
+    Example::
+
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parse_string('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parse_string('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parse_string('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parse_string('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+
+    def __init__(
+        self,
+        expr: ParserElement,
+        join_string: str = "",
+        adjacent: bool = True,
+        *,
+        joinString: typing.Optional[str] = None,
+    ):
+        super().__init__(expr)
+        joinString = joinString if joinString is not None else join_string
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leave_whitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore(self, other) -> ParserElement:
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super().ignore(other)
+        return self
+
+    def postParse(self, instring, loc, tokenlist):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults(
+            ["".join(tokenlist._asStringList(self.joinString))], modal=self.modalResults
+        )
+
+        if self.resultsName and retToks.haskeys():
+            return [retToks]
+        else:
+            return retToks
+
+
+class Group(TokenConverter):
+    """Converter to return the matched tokens as a list - useful for
+    returning tokens of :class:`ZeroOrMore` and :class:`OneOrMore` expressions.
+
+    The optional ``aslist`` argument when set to True will return the
+    parsed tokens as a Python list instead of a pyparsing ParseResults.
+
+    Example::
+
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Opt(delimited_list(term))
+        print(func.parse_string("fn a, b, 100"))
+        # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Opt(delimited_list(term)))
+        print(func.parse_string("fn a, b, 100"))
+        # -> ['fn', ['a', 'b', '100']]
+    """
+
+    def __init__(self, expr: ParserElement, aslist: bool = False):
+        super().__init__(expr)
+        self.saveAsList = True
+        self._asPythonList = aslist
+
+    def postParse(self, instring, loc, tokenlist):
+        if self._asPythonList:
+            return ParseResults.List(
+                tokenlist.asList()
+                if isinstance(tokenlist, ParseResults)
+                else list(tokenlist)
+            )
+        else:
+            return [tokenlist]
+
+
+class Dict(TokenConverter):
+    """Converter to return a repetitive expression as a list, but also
+    as a dictionary. Each element can also be referenced using the first
+    token in the expression as its key. Useful for tabular report
+    scraping when the first column can be used as a item key.
+
+    The optional ``asdict`` argument when set to True will return the
+    parsed tokens as a Python dict instead of a pyparsing ParseResults.
+
+    Example::
+
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join))
+
+        # print attributes as plain groups
+        print(attr_expr[1, ...].parse_string(text).dump())
+
+        # instead of OneOrMore(expr), parse using Dict(Group(expr)[1, ...]) - Dict will auto-assign names
+        result = Dict(Group(attr_expr)[1, ...]).parse_string(text)
+        print(result.dump())
+
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])
+        print(result.as_dict())
+
+    prints::
+
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: 'light blue'
+        - posn: 'upper left'
+        - shape: 'SQUARE'
+        - texture: 'burlap'
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+
+    See more examples at :class:`ParseResults` of accessing fields by results name.
+    """
+
+    def __init__(self, expr: ParserElement, asdict: bool = False):
+        super().__init__(expr)
+        self.saveAsList = True
+        self._asPythonDict = asdict
+
+    def postParse(self, instring, loc, tokenlist):
+        for i, tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+
+            ikey = tok[0]
+            if isinstance(ikey, int):
+                ikey = str(ikey).strip()
+
+            if len(tok) == 1:
+                tokenlist[ikey] = _ParseResultsWithOffset("", i)
+
+            elif len(tok) == 2 and not isinstance(tok[1], ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1], i)
+
+            else:
+                try:
+                    dictvalue = tok.copy()  # ParseResults(i)
+                except Exception:
+                    exc = TypeError(
+                        "could not extract dict values from parsed results"
+                        " - Dict expression must contain Grouped expressions"
+                    )
+                    raise exc from None
+
+                del dictvalue[0]
+
+                if len(dictvalue) != 1 or (
+                    isinstance(dictvalue, ParseResults) and dictvalue.haskeys()
+                ):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue, i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0], i)
+
+        if self._asPythonDict:
+            return [tokenlist.as_dict()] if self.resultsName else tokenlist.as_dict()
+        else:
+            return [tokenlist] if self.resultsName else tokenlist
+
+
+class Suppress(TokenConverter):
+    """Converter for ignoring the results of a parsed expression.
+
+    Example::
+
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + (',' + wd)[...]
+        print(wd_list1.parse_string(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + (Suppress(',') + wd)[...]
+        print(wd_list2.parse_string(source))
+
+        # Skipped text (using '...') can be suppressed as well
+        source = "lead in START relevant text END trailing text"
+        start_marker = Keyword("START")
+        end_marker = Keyword("END")
+        find_body = Suppress(...) + start_marker + ... + end_marker
+        print(find_body.parse_string(source)
+
+    prints::
+
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+        ['START', 'relevant text ', 'END']
+
+    (See also :class:`delimited_list`.)
+    """
+
+    def __init__(self, expr: Union[ParserElement, str], savelist: bool = False):
+        if expr is ...:
+            expr = _PendingSkip(NoMatch())
+        super().__init__(expr)
+
+    def __add__(self, other) -> "ParserElement":
+        if isinstance(self.expr, _PendingSkip):
+            return Suppress(SkipTo(other)) + other
+        else:
+            return super().__add__(other)
+
+    def __sub__(self, other) -> "ParserElement":
+        if isinstance(self.expr, _PendingSkip):
+            return Suppress(SkipTo(other)) - other
+        else:
+            return super().__sub__(other)
+
+    def postParse(self, instring, loc, tokenlist):
+        return []
+
+    def suppress(self) -> ParserElement:
+        return self
+
+
+def trace_parse_action(f: ParseAction) -> ParseAction:
+    """Decorator for debugging parse actions.
+
+    When the parse action is called, this decorator will print
+    ``">> entering method-name(line:<current_source_line>, <parse_location>, <matched_tokens>)"``.
+    When the parse action completes, the decorator will print
+    ``"<<"`` followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+
+        wd = Word(alphas)
+
+        @trace_parse_action
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = wd[1, ...].set_parse_action(remove_duplicate_chars)
+        print(wds.parse_string("slkdjs sld sldd sdlf sdljf"))
+
+    prints::
+
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s, l, t = paArgs[-3:]
+        if len(paArgs) > 3:
+            thisFunc = paArgs[0].__class__.__name__ + "." + thisFunc
+        sys.stderr.write(
+            ">>entering {}(line: {!r}, {}, {!r})\n".format(thisFunc, line(l, s), l, t)
+        )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write("<<leaving {} (exception: {})\n".format(thisFunc, exc))
+            raise
+        sys.stderr.write("<<leaving {} (ret: {!r})\n".format(thisFunc, ret))
+        return ret
+
+    z.__name__ = f.__name__
+    return z
+
+
+# convenience constants for positional expressions
+empty = Empty().set_name("empty")
+line_start = LineStart().set_name("line_start")
+line_end = LineEnd().set_name("line_end")
+string_start = StringStart().set_name("string_start")
+string_end = StringEnd().set_name("string_end")
+
+_escapedPunc = Word(_bslash, r"\[]-*.$+^?()~ ", exact=2).set_parse_action(
+    lambda s, l, t: t[0][1]
+)
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").set_parse_action(
+    lambda s, l, t: chr(int(t[0].lstrip(r"\0x"), 16))
+)
+_escapedOctChar = Regex(r"\\0[0-7]+").set_parse_action(
+    lambda s, l, t: chr(int(t[0][1:], 8))
+)
+_singleChar = (
+    _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r"\]", exact=1)
+)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = (
+    Literal("[")
+    + Opt("^").set_results_name("negate")
+    + Group(OneOrMore(_charRange | _singleChar)).set_results_name("body")
+    + "]"
+)
+
+
+def srange(s: str) -> str:
+    r"""Helper to easily define string ranges for use in :class:`Word`
+    construction. Borrows syntax from regexp ``'[]'`` string range
+    definitions::
+
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+
+    The input string must be enclosed in []'s, and the returned string
+    is the expanded character set joined into a single string. The
+    values enclosed in the []'s may be:
+
+    - a single character
+    - an escaped character with a leading backslash (such as ``\-``
+      or ``\]``)
+    - an escaped hex character with a leading ``'\x'``
+      (``\x21``, which is a ``'!'`` character) (``\0x##``
+      is also supported for backwards compatibility)
+    - an escaped octal character with a leading ``'\0'``
+      (``\041``, which is a ``'!'`` character)
+    - a range of any of the above, separated by a dash (``'a-z'``,
+      etc.)
+    - any combination of the above (``'aeiouy'``,
+      ``'a-zA-Z0-9_$'``, etc.)
+    """
+    _expanded = (
+        lambda p: p
+        if not isinstance(p, ParseResults)
+        else "".join(chr(c) for c in range(ord(p[0]), ord(p[1]) + 1))
+    )
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parse_string(s).body)
+    except Exception:
+        return ""
+
+
+def token_map(func, *args) -> ParseAction:
+    """Helper to define a parse action by mapping a function to all
+    elements of a :class:`ParseResults` list. If any additional args are passed,
+    they are forwarded to the given function as additional arguments
+    after the token, as in
+    ``hex_integer = Word(hexnums).set_parse_action(token_map(int, 16))``,
+    which will convert the parsed data to an integer using base 16.
+
+    Example (compare the last to example in :class:`ParserElement.transform_string`::
+
+        hex_ints = Word(hexnums)[1, ...].set_parse_action(token_map(int, 16))
+        hex_ints.run_tests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+
+        upperword = Word(alphas).set_parse_action(token_map(str.upper))
+        upperword[1, ...].run_tests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).set_parse_action(token_map(str.title))
+        wd[1, ...].set_parse_action(' '.join).run_tests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+
+    prints::
+
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+
+    def pa(s, l, t):
+        return [func(tokn, *args) for tokn in t]
+
+    func_name = getattr(func, "__name__", getattr(func, "__class__").__name__)
+    pa.__name__ = func_name
+
+    return pa
+
+
+def autoname_elements() -> None:
+    """
+    Utility to simplify mass-naming of parser elements, for
+    generating railroad diagram with named subdiagrams.
+    """
+    for name, var in sys._getframe().f_back.f_locals.items():
+        if isinstance(var, ParserElement) and not var.customName:
+            var.set_name(name)
+
+
+dbl_quoted_string = Combine(
+    Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"'
+).set_name("string enclosed in double quotes")
+
+sgl_quoted_string = Combine(
+    Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'"
+).set_name("string enclosed in single quotes")
+
+quoted_string = Combine(
+    Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*') + '"'
+    | Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*") + "'"
+).set_name("quotedString using single or double quotes")
+
+unicode_string = Combine("u" + quoted_string.copy()).set_name("unicode string literal")
+
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+# build list of built-in expressions, for future reference if a global default value
+# gets updated
+_builtin_exprs: List[ParserElement] = [
+    v for v in vars().values() if isinstance(v, ParserElement)
+]
+
+# backward compatibility names
+tokenMap = token_map
+conditionAsParseAction = condition_as_parse_action
+nullDebugAction = null_debug_action
+sglQuotedString = sgl_quoted_string
+dblQuotedString = dbl_quoted_string
+quotedString = quoted_string
+unicodeString = unicode_string
+lineStart = line_start
+lineEnd = line_end
+stringStart = string_start
+stringEnd = string_end
+traceParseAction = trace_parse_action
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__init__.py
new file mode 100644
index 0000000..1506d66
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__init__.py
@@ -0,0 +1,642 @@
+import railroad
+from pip._vendor import pyparsing
+import typing
+from typing import (
+    List,
+    NamedTuple,
+    Generic,
+    TypeVar,
+    Dict,
+    Callable,
+    Set,
+    Iterable,
+)
+from jinja2 import Template
+from io import StringIO
+import inspect
+
+
+jinja2_template_source = """\
+<!DOCTYPE html>
+<html>
+<head>
+    {% if not head %}
+        <style type="text/css">
+            .railroad-heading {
+                font-family: monospace;
+            }
+        </style>
+    {% else %}
+        {{ head | safe }}
+    {% endif %}
+</head>
+<body>
+{{ body | safe }}
+{% for diagram in diagrams %}
+    <div class="railroad-group">
+        <h1 class="railroad-heading">{{ diagram.title }}</h1>
+        <div class="railroad-description">{{ diagram.text }}</div>
+        <div class="railroad-svg">
+            {{ diagram.svg }}
+        </div>
+    </div>
+{% endfor %}
+</body>
+</html>
+"""
+
+template = Template(jinja2_template_source)
+
+# Note: ideally this would be a dataclass, but we're supporting Python 3.5+ so we can't do this yet
+NamedDiagram = NamedTuple(
+    "NamedDiagram",
+    [("name", str), ("diagram", typing.Optional[railroad.DiagramItem]), ("index", int)],
+)
+"""
+A simple structure for associating a name with a railroad diagram
+"""
+
+T = TypeVar("T")
+
+
+class EachItem(railroad.Group):
+    """
+    Custom railroad item to compose a:
+    - Group containing a
+      - OneOrMore containing a
+        - Choice of the elements in the Each
+    with the group label indicating that all must be matched
+    """
+
+    all_label = "[ALL]"
+
+    def __init__(self, *items):
+        choice_item = railroad.Choice(len(items) - 1, *items)
+        one_or_more_item = railroad.OneOrMore(item=choice_item)
+        super().__init__(one_or_more_item, label=self.all_label)
+
+
+class AnnotatedItem(railroad.Group):
+    """
+    Simple subclass of Group that creates an annotation label
+    """
+
+    def __init__(self, label: str, item):
+        super().__init__(item=item, label="[{}]".format(label) if label else label)
+
+
+class EditablePartial(Generic[T]):
+    """
+    Acts like a functools.partial, but can be edited. In other words, it represents a type that hasn't yet been
+    constructed.
+    """
+
+    # We need this here because the railroad constructors actually transform the data, so can't be called until the
+    # entire tree is assembled
+
+    def __init__(self, func: Callable[..., T], args: list, kwargs: dict):
+        self.func = func
+        self.args = args
+        self.kwargs = kwargs
+
+    @classmethod
+    def from_call(cls, func: Callable[..., T], *args, **kwargs) -> "EditablePartial[T]":
+        """
+        If you call this function in the same way that you would call the constructor, it will store the arguments
+        as you expect. For example EditablePartial.from_call(Fraction, 1, 3)() == Fraction(1, 3)
+        """
+        return EditablePartial(func=func, args=list(args), kwargs=kwargs)
+
+    @property
+    def name(self):
+        return self.kwargs["name"]
+
+    def __call__(self) -> T:
+        """
+        Evaluate the partial and return the result
+        """
+        args = self.args.copy()
+        kwargs = self.kwargs.copy()
+
+        # This is a helpful hack to allow you to specify varargs parameters (e.g. *args) as keyword args (e.g.
+        # args=['list', 'of', 'things'])
+        arg_spec = inspect.getfullargspec(self.func)
+        if arg_spec.varargs in self.kwargs:
+            args += kwargs.pop(arg_spec.varargs)
+
+        return self.func(*args, **kwargs)
+
+
+def railroad_to_html(diagrams: List[NamedDiagram], **kwargs) -> str:
+    """
+    Given a list of NamedDiagram, produce a single HTML string that visualises those diagrams
+    :params kwargs: kwargs to be passed in to the template
+    """
+    data = []
+    for diagram in diagrams:
+        if diagram.diagram is None:
+            continue
+        io = StringIO()
+        diagram.diagram.writeSvg(io.write)
+        title = diagram.name
+        if diagram.index == 0:
+            title += " (root)"
+        data.append({"title": title, "text": "", "svg": io.getvalue()})
+
+    return template.render(diagrams=data, **kwargs)
+
+
+def resolve_partial(partial: "EditablePartial[T]") -> T:
+    """
+    Recursively resolves a collection of Partials into whatever type they are
+    """
+    if isinstance(partial, EditablePartial):
+        partial.args = resolve_partial(partial.args)
+        partial.kwargs = resolve_partial(partial.kwargs)
+        return partial()
+    elif isinstance(partial, list):
+        return [resolve_partial(x) for x in partial]
+    elif isinstance(partial, dict):
+        return {key: resolve_partial(x) for key, x in partial.items()}
+    else:
+        return partial
+
+
+def to_railroad(
+    element: pyparsing.ParserElement,
+    diagram_kwargs: typing.Optional[dict] = None,
+    vertical: int = 3,
+    show_results_names: bool = False,
+    show_groups: bool = False,
+) -> List[NamedDiagram]:
+    """
+    Convert a pyparsing element tree into a list of diagrams. This is the recommended entrypoint to diagram
+    creation if you want to access the Railroad tree before it is converted to HTML
+    :param element: base element of the parser being diagrammed
+    :param diagram_kwargs: kwargs to pass to the Diagram() constructor
+    :param vertical: (optional) - int - limit at which number of alternatives should be
+       shown vertically instead of horizontally
+    :param show_results_names - bool to indicate whether results name annotations should be
+       included in the diagram
+    :param show_groups - bool to indicate whether groups should be highlighted with an unlabeled
+       surrounding box
+    """
+    # Convert the whole tree underneath the root
+    lookup = ConverterState(diagram_kwargs=diagram_kwargs or {})
+    _to_diagram_element(
+        element,
+        lookup=lookup,
+        parent=None,
+        vertical=vertical,
+        show_results_names=show_results_names,
+        show_groups=show_groups,
+    )
+
+    root_id = id(element)
+    # Convert the root if it hasn't been already
+    if root_id in lookup:
+        if not element.customName:
+            lookup[root_id].name = ""
+        lookup[root_id].mark_for_extraction(root_id, lookup, force=True)
+
+    # Now that we're finished, we can convert from intermediate structures into Railroad elements
+    diags = list(lookup.diagrams.values())
+    if len(diags) > 1:
+        # collapse out duplicate diags with the same name
+        seen = set()
+        deduped_diags = []
+        for d in diags:
+            # don't extract SkipTo elements, they are uninformative as subdiagrams
+            if d.name == "...":
+                continue
+            if d.name is not None and d.name not in seen:
+                seen.add(d.name)
+                deduped_diags.append(d)
+        resolved = [resolve_partial(partial) for partial in deduped_diags]
+    else:
+        # special case - if just one diagram, always display it, even if
+        # it has no name
+        resolved = [resolve_partial(partial) for partial in diags]
+    return sorted(resolved, key=lambda diag: diag.index)
+
+
+def _should_vertical(
+    specification: int, exprs: Iterable[pyparsing.ParserElement]
+) -> bool:
+    """
+    Returns true if we should return a vertical list of elements
+    """
+    if specification is None:
+        return False
+    else:
+        return len(_visible_exprs(exprs)) >= specification
+
+
+class ElementState:
+    """
+    State recorded for an individual pyparsing Element
+    """
+
+    # Note: this should be a dataclass, but we have to support Python 3.5
+    def __init__(
+        self,
+        element: pyparsing.ParserElement,
+        converted: EditablePartial,
+        parent: EditablePartial,
+        number: int,
+        name: str = None,
+        parent_index: typing.Optional[int] = None,
+    ):
+        #: The pyparsing element that this represents
+        self.element: pyparsing.ParserElement = element
+        #: The name of the element
+        self.name: typing.Optional[str] = name
+        #: The output Railroad element in an unconverted state
+        self.converted: EditablePartial = converted
+        #: The parent Railroad element, which we store so that we can extract this if it's duplicated
+        self.parent: EditablePartial = parent
+        #: The order in which we found this element, used for sorting diagrams if this is extracted into a diagram
+        self.number: int = number
+        #: The index of this inside its parent
+        self.parent_index: typing.Optional[int] = parent_index
+        #: If true, we should extract this out into a subdiagram
+        self.extract: bool = False
+        #: If true, all of this element's children have been filled out
+        self.complete: bool = False
+
+    def mark_for_extraction(
+        self, el_id: int, state: "ConverterState", name: str = None, force: bool = False
+    ):
+        """
+        Called when this instance has been seen twice, and thus should eventually be extracted into a sub-diagram
+        :param el_id: id of the element
+        :param state: element/diagram state tracker
+        :param name: name to use for this element's text
+        :param force: If true, force extraction now, regardless of the state of this. Only useful for extracting the
+        root element when we know we're finished
+        """
+        self.extract = True
+
+        # Set the name
+        if not self.name:
+            if name:
+                # Allow forcing a custom name
+                self.name = name
+            elif self.element.customName:
+                self.name = self.element.customName
+            else:
+                self.name = ""
+
+        # Just because this is marked for extraction doesn't mean we can do it yet. We may have to wait for children
+        # to be added
+        # Also, if this is just a string literal etc, don't bother extracting it
+        if force or (self.complete and _worth_extracting(self.element)):
+            state.extract_into_diagram(el_id)
+
+
+class ConverterState:
+    """
+    Stores some state that persists between recursions into the element tree
+    """
+
+    def __init__(self, diagram_kwargs: typing.Optional[dict] = None):
+        #: A dictionary mapping ParserElements to state relating to them
+        self._element_diagram_states: Dict[int, ElementState] = {}
+        #: A dictionary mapping ParserElement IDs to subdiagrams generated from them
+        self.diagrams: Dict[int, EditablePartial[NamedDiagram]] = {}
+        #: The index of the next unnamed element
+        self.unnamed_index: int = 1
+        #: The index of the next element. This is used for sorting
+        self.index: int = 0
+        #: Shared kwargs that are used to customize the construction of diagrams
+        self.diagram_kwargs: dict = diagram_kwargs or {}
+        self.extracted_diagram_names: Set[str] = set()
+
+    def __setitem__(self, key: int, value: ElementState):
+        self._element_diagram_states[key] = value
+
+    def __getitem__(self, key: int) -> ElementState:
+        return self._element_diagram_states[key]
+
+    def __delitem__(self, key: int):
+        del self._element_diagram_states[key]
+
+    def __contains__(self, key: int):
+        return key in self._element_diagram_states
+
+    def generate_unnamed(self) -> int:
+        """
+        Generate a number used in the name of an otherwise unnamed diagram
+        """
+        self.unnamed_index += 1
+        return self.unnamed_index
+
+    def generate_index(self) -> int:
+        """
+        Generate a number used to index a diagram
+        """
+        self.index += 1
+        return self.index
+
+    def extract_into_diagram(self, el_id: int):
+        """
+        Used when we encounter the same token twice in the same tree. When this
+        happens, we replace all instances of that token with a terminal, and
+        create a new subdiagram for the token
+        """
+        position = self[el_id]
+
+        # Replace the original definition of this element with a regular block
+        if position.parent:
+            ret = EditablePartial.from_call(railroad.NonTerminal, text=position.name)
+            if "item" in position.parent.kwargs:
+                position.parent.kwargs["item"] = ret
+            elif "items" in position.parent.kwargs:
+                position.parent.kwargs["items"][position.parent_index] = ret
+
+        # If the element we're extracting is a group, skip to its content but keep the title
+        if position.converted.func == railroad.Group:
+            content = position.converted.kwargs["item"]
+        else:
+            content = position.converted
+
+        self.diagrams[el_id] = EditablePartial.from_call(
+            NamedDiagram,
+            name=position.name,
+            diagram=EditablePartial.from_call(
+                railroad.Diagram, content, **self.diagram_kwargs
+            ),
+            index=position.number,
+        )
+
+        del self[el_id]
+
+
+def _worth_extracting(element: pyparsing.ParserElement) -> bool:
+    """
+    Returns true if this element is worth having its own sub-diagram. Simply, if any of its children
+    themselves have children, then its complex enough to extract
+    """
+    children = element.recurse()
+    return any(child.recurse() for child in children)
+
+
+def _apply_diagram_item_enhancements(fn):
+    """
+    decorator to ensure enhancements to a diagram item (such as results name annotations)
+    get applied on return from _to_diagram_element (we do this since there are several
+    returns in _to_diagram_element)
+    """
+
+    def _inner(
+        element: pyparsing.ParserElement,
+        parent: typing.Optional[EditablePartial],
+        lookup: ConverterState = None,
+        vertical: int = None,
+        index: int = 0,
+        name_hint: str = None,
+        show_results_names: bool = False,
+        show_groups: bool = False,
+    ) -> typing.Optional[EditablePartial]:
+
+        ret = fn(
+            element,
+            parent,
+            lookup,
+            vertical,
+            index,
+            name_hint,
+            show_results_names,
+            show_groups,
+        )
+
+        # apply annotation for results name, if present
+        if show_results_names and ret is not None:
+            element_results_name = element.resultsName
+            if element_results_name:
+                # add "*" to indicate if this is a "list all results" name
+                element_results_name += "" if element.modalResults else "*"
+                ret = EditablePartial.from_call(
+                    railroad.Group, item=ret, label=element_results_name
+                )
+
+        return ret
+
+    return _inner
+
+
+def _visible_exprs(exprs: Iterable[pyparsing.ParserElement]):
+    non_diagramming_exprs = (
+        pyparsing.ParseElementEnhance,
+        pyparsing.PositionToken,
+        pyparsing.And._ErrorStop,
+    )
+    return [
+        e
+        for e in exprs
+        if not (e.customName or e.resultsName or isinstance(e, non_diagramming_exprs))
+    ]
+
+
+@_apply_diagram_item_enhancements
+def _to_diagram_element(
+    element: pyparsing.ParserElement,
+    parent: typing.Optional[EditablePartial],
+    lookup: ConverterState = None,
+    vertical: int = None,
+    index: int = 0,
+    name_hint: str = None,
+    show_results_names: bool = False,
+    show_groups: bool = False,
+) -> typing.Optional[EditablePartial]:
+    """
+    Recursively converts a PyParsing Element to a railroad Element
+    :param lookup: The shared converter state that keeps track of useful things
+    :param index: The index of this element within the parent
+    :param parent: The parent of this element in the output tree
+    :param vertical: Controls at what point we make a list of elements vertical. If this is an integer (the default),
+    it sets the threshold of the number of items before we go vertical. If True, always go vertical, if False, never
+    do so
+    :param name_hint: If provided, this will override the generated name
+    :param show_results_names: bool flag indicating whether to add annotations for results names
+    :returns: The converted version of the input element, but as a Partial that hasn't yet been constructed
+    :param show_groups: bool flag indicating whether to show groups using bounding box
+    """
+    exprs = element.recurse()
+    name = name_hint or element.customName or element.__class__.__name__
+
+    # Python's id() is used to provide a unique identifier for elements
+    el_id = id(element)
+
+    element_results_name = element.resultsName
+
+    # Here we basically bypass processing certain wrapper elements if they contribute nothing to the diagram
+    if not element.customName:
+        if isinstance(
+            element,
+            (
+                # pyparsing.TokenConverter,
+                # pyparsing.Forward,
+                pyparsing.Located,
+            ),
+        ):
+            # However, if this element has a useful custom name, and its child does not, we can pass it on to the child
+            if exprs:
+                if not exprs[0].customName:
+                    propagated_name = name
+                else:
+                    propagated_name = None
+
+                return _to_diagram_element(
+                    element.expr,
+                    parent=parent,
+                    lookup=lookup,
+                    vertical=vertical,
+                    index=index,
+                    name_hint=propagated_name,
+                    show_results_names=show_results_names,
+                    show_groups=show_groups,
+                )
+
+    # If the element isn't worth extracting, we always treat it as the first time we say it
+    if _worth_extracting(element):
+        if el_id in lookup:
+            # If we've seen this element exactly once before, we are only just now finding out that it's a duplicate,
+            # so we have to extract it into a new diagram.
+            looked_up = lookup[el_id]
+            looked_up.mark_for_extraction(el_id, lookup, name=name_hint)
+            ret = EditablePartial.from_call(railroad.NonTerminal, text=looked_up.name)
+            return ret
+
+        elif el_id in lookup.diagrams:
+            # If we have seen the element at least twice before, and have already extracted it into a subdiagram, we
+            # just put in a marker element that refers to the sub-diagram
+            ret = EditablePartial.from_call(
+                railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"]
+            )
+            return ret
+
+    # Recursively convert child elements
+    # Here we find the most relevant Railroad element for matching pyparsing Element
+    # We use ``items=[]`` here to hold the place for where the child elements will go once created
+    if isinstance(element, pyparsing.And):
+        # detect And's created with ``expr*N`` notation - for these use a OneOrMore with a repeat
+        # (all will have the same name, and resultsName)
+        if not exprs:
+            return None
+        if len(set((e.name, e.resultsName) for e in exprs)) == 1:
+            ret = EditablePartial.from_call(
+                railroad.OneOrMore, item="", repeat=str(len(exprs))
+            )
+        elif _should_vertical(vertical, exprs):
+            ret = EditablePartial.from_call(railroad.Stack, items=[])
+        else:
+            ret = EditablePartial.from_call(railroad.Sequence, items=[])
+    elif isinstance(element, (pyparsing.Or, pyparsing.MatchFirst)):
+        if not exprs:
+            return None
+        if _should_vertical(vertical, exprs):
+            ret = EditablePartial.from_call(railroad.Choice, 0, items=[])
+        else:
+            ret = EditablePartial.from_call(railroad.HorizontalChoice, items=[])
+    elif isinstance(element, pyparsing.Each):
+        if not exprs:
+            return None
+        ret = EditablePartial.from_call(EachItem, items=[])
+    elif isinstance(element, pyparsing.NotAny):
+        ret = EditablePartial.from_call(AnnotatedItem, label="NOT", item="")
+    elif isinstance(element, pyparsing.FollowedBy):
+        ret = EditablePartial.from_call(AnnotatedItem, label="LOOKAHEAD", item="")
+    elif isinstance(element, pyparsing.PrecededBy):
+        ret = EditablePartial.from_call(AnnotatedItem, label="LOOKBEHIND", item="")
+    elif isinstance(element, pyparsing.Group):
+        if show_groups:
+            ret = EditablePartial.from_call(AnnotatedItem, label="", item="")
+        else:
+            ret = EditablePartial.from_call(railroad.Group, label="", item="")
+    elif isinstance(element, pyparsing.TokenConverter):
+        ret = EditablePartial.from_call(
+            AnnotatedItem, label=type(element).__name__.lower(), item=""
+        )
+    elif isinstance(element, pyparsing.Opt):
+        ret = EditablePartial.from_call(railroad.Optional, item="")
+    elif isinstance(element, pyparsing.OneOrMore):
+        ret = EditablePartial.from_call(railroad.OneOrMore, item="")
+    elif isinstance(element, pyparsing.ZeroOrMore):
+        ret = EditablePartial.from_call(railroad.ZeroOrMore, item="")
+    elif isinstance(element, pyparsing.Group):
+        ret = EditablePartial.from_call(
+            railroad.Group, item=None, label=element_results_name
+        )
+    elif isinstance(element, pyparsing.Empty) and not element.customName:
+        # Skip unnamed "Empty" elements
+        ret = None
+    elif len(exprs) > 1:
+        ret = EditablePartial.from_call(railroad.Sequence, items=[])
+    elif len(exprs) > 0 and not element_results_name:
+        ret = EditablePartial.from_call(railroad.Group, item="", label=name)
+    else:
+        terminal = EditablePartial.from_call(railroad.Terminal, element.defaultName)
+        ret = terminal
+
+    if ret is None:
+        return
+
+    # Indicate this element's position in the tree so we can extract it if necessary
+    lookup[el_id] = ElementState(
+        element=element,
+        converted=ret,
+        parent=parent,
+        parent_index=index,
+        number=lookup.generate_index(),
+    )
+    if element.customName:
+        lookup[el_id].mark_for_extraction(el_id, lookup, element.customName)
+
+    i = 0
+    for expr in exprs:
+        # Add a placeholder index in case we have to extract the child before we even add it to the parent
+        if "items" in ret.kwargs:
+            ret.kwargs["items"].insert(i, None)
+
+        item = _to_diagram_element(
+            expr,
+            parent=ret,
+            lookup=lookup,
+            vertical=vertical,
+            index=i,
+            show_results_names=show_results_names,
+            show_groups=show_groups,
+        )
+
+        # Some elements don't need to be shown in the diagram
+        if item is not None:
+            if "item" in ret.kwargs:
+                ret.kwargs["item"] = item
+            elif "items" in ret.kwargs:
+                # If we've already extracted the child, don't touch this index, since it's occupied by a nonterminal
+                ret.kwargs["items"][i] = item
+                i += 1
+        elif "items" in ret.kwargs:
+            # If we're supposed to skip this element, remove it from the parent
+            del ret.kwargs["items"][i]
+
+    # If all this items children are none, skip this item
+    if ret and (
+        ("items" in ret.kwargs and len(ret.kwargs["items"]) == 0)
+        or ("item" in ret.kwargs and ret.kwargs["item"] is None)
+    ):
+        ret = EditablePartial.from_call(railroad.Terminal, name)
+
+    # Mark this element as "complete", ie it has all of its children
+    if el_id in lookup:
+        lookup[el_id].complete = True
+
+    if el_id in lookup and lookup[el_id].extract and lookup[el_id].complete:
+        lookup.extract_into_diagram(el_id)
+        if ret is not None:
+            ret = EditablePartial.from_call(
+                railroad.NonTerminal, text=lookup.diagrams[el_id].kwargs["name"]
+            )
+
+    return ret
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..0838614
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/diagram/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/exceptions.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/exceptions.py
new file mode 100644
index 0000000..a38447b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/exceptions.py
@@ -0,0 +1,267 @@
+# exceptions.py
+
+import re
+import sys
+import typing
+
+from .util import col, line, lineno, _collapse_string_to_ranges
+from .unicode import pyparsing_unicode as ppu
+
+
+class ExceptionWordUnicode(ppu.Latin1, ppu.LatinA, ppu.LatinB, ppu.Greek, ppu.Cyrillic):
+    pass
+
+
+_extract_alphanums = _collapse_string_to_ranges(ExceptionWordUnicode.alphanums)
+_exception_word_extractor = re.compile("([" + _extract_alphanums + "]{1,16})|.")
+
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__(
+        self,
+        pstr: str,
+        loc: int = 0,
+        msg: typing.Optional[str] = None,
+        elem=None,
+    ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parser_element = self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @staticmethod
+    def explain_exception(exc, depth=16):
+        """
+        Method to take an exception and translate the Python internal traceback into a list
+        of the pyparsing expressions that caused the exception to be raised.
+
+        Parameters:
+
+        - exc - exception raised during parsing (need not be a ParseException, in support
+          of Python exceptions that might be raised in a parse action)
+        - depth (default=16) - number of levels back in the stack trace to list expression
+          and function names; if None, the full stack trace names will be listed; if 0, only
+          the failing input line, marker, and exception string will be shown
+
+        Returns a multi-line string listing the ParserElements and/or function names in the
+        exception's stack trace.
+        """
+        import inspect
+        from .core import ParserElement
+
+        if depth is None:
+            depth = sys.getrecursionlimit()
+        ret = []
+        if isinstance(exc, ParseBaseException):
+            ret.append(exc.line)
+            ret.append(" " * (exc.column - 1) + "^")
+        ret.append("{}: {}".format(type(exc).__name__, exc))
+
+        if depth > 0:
+            callers = inspect.getinnerframes(exc.__traceback__, context=depth)
+            seen = set()
+            for i, ff in enumerate(callers[-depth:]):
+                frm = ff[0]
+
+                f_self = frm.f_locals.get("self", None)
+                if isinstance(f_self, ParserElement):
+                    if frm.f_code.co_name not in ("parseImpl", "_parseNoCache"):
+                        continue
+                    if id(f_self) in seen:
+                        continue
+                    seen.add(id(f_self))
+
+                    self_type = type(f_self)
+                    ret.append(
+                        "{}.{} - {}".format(
+                            self_type.__module__, self_type.__name__, f_self
+                        )
+                    )
+
+                elif f_self is not None:
+                    self_type = type(f_self)
+                    ret.append("{}.{}".format(self_type.__module__, self_type.__name__))
+
+                else:
+                    code = frm.f_code
+                    if code.co_name in ("wrapper", "<module>"):
+                        continue
+
+                    ret.append("{}".format(code.co_name))
+
+                depth -= 1
+                if not depth:
+                    break
+
+        return "\n".join(ret)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    @property
+    def line(self) -> str:
+        """
+        Return the line of text where the exception occurred.
+        """
+        return line(self.loc, self.pstr)
+
+    @property
+    def lineno(self) -> int:
+        """
+        Return the 1-based line number of text where the exception occurred.
+        """
+        return lineno(self.loc, self.pstr)
+
+    @property
+    def col(self) -> int:
+        """
+        Return the 1-based column on the line of text where the exception occurred.
+        """
+        return col(self.loc, self.pstr)
+
+    @property
+    def column(self) -> int:
+        """
+        Return the 1-based column on the line of text where the exception occurred.
+        """
+        return col(self.loc, self.pstr)
+
+    def __str__(self) -> str:
+        if self.pstr:
+            if self.loc >= len(self.pstr):
+                foundstr = ", found end of text"
+            else:
+                # pull out next word at error location
+                found_match = _exception_word_extractor.match(self.pstr, self.loc)
+                if found_match is not None:
+                    found = found_match.group(0)
+                else:
+                    found = self.pstr[self.loc : self.loc + 1]
+                foundstr = (", found %r" % found).replace(r"\\", "\\")
+        else:
+            foundstr = ""
+        return "{}{}  (at char {}), (line:{}, col:{})".format(
+            self.msg, foundstr, self.loc, self.lineno, self.column
+        )
+
+    def __repr__(self):
+        return str(self)
+
+    def mark_input_line(self, marker_string: str = None, *, markerString=">!<") -> str:
+        """
+        Extracts the exception line from the input string, and marks
+        the location of the exception with a special symbol.
+        """
+        markerString = marker_string if marker_string is not None else markerString
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join(
+                (line_str[:line_column], markerString, line_str[line_column:])
+            )
+        return line_str.strip()
+
+    def explain(self, depth=16) -> str:
+        """
+        Method to translate the Python internal traceback into a list
+        of the pyparsing expressions that caused the exception to be raised.
+
+        Parameters:
+
+        - depth (default=16) - number of levels back in the stack trace to list expression
+          and function names; if None, the full stack trace names will be listed; if 0, only
+          the failing input line, marker, and exception string will be shown
+
+        Returns a multi-line string listing the ParserElements and/or function names in the
+        exception's stack trace.
+
+        Example::
+
+            expr = pp.Word(pp.nums) * 3
+            try:
+                expr.parse_string("123 456 A789")
+            except pp.ParseException as pe:
+                print(pe.explain(depth=0))
+
+        prints::
+
+            123 456 A789
+                    ^
+            ParseException: Expected W:(0-9), found 'A'  (at char 8), (line:1, col:9)
+
+        Note: the diagnostic output will include string representations of the expressions
+        that failed to parse. These representations will be more helpful if you use `set_name` to
+        give identifiable names to your expressions. Otherwise they will use the default string
+        forms, which may be cryptic to read.
+
+        Note: pyparsing's default truncation of exception tracebacks may also truncate the
+        stack of expressions that are displayed in the ``explain`` output. To get the full listing
+        of parser expressions, you may have to set ``ParserElement.verbose_stacktrace = True``
+        """
+        return self.explain_exception(self, depth)
+
+    markInputline = mark_input_line
+
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when a parse expression doesn't match the input string
+
+    Example::
+
+        try:
+            Word(nums).set_name("integer").parse_string("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.column))
+
+    prints::
+
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+
+    """
+
+
+class ParseFatalException(ParseBaseException):
+    """
+    User-throwable exception thrown when inconsistent parse content
+    is found; stops all parsing immediately
+    """
+
+
+class ParseSyntaxException(ParseFatalException):
+    """
+    Just like :class:`ParseFatalException`, but thrown internally
+    when an :class:`ErrorStop<And._ErrorStop>` ('-' operator) indicates
+    that parsing is to stop immediately because an unbacktrackable
+    syntax error has been found.
+    """
+
+
+class RecursiveGrammarException(Exception):
+    """
+    Exception thrown by :class:`ParserElement.validate` if the
+    grammar could be left-recursive; parser may need to enable
+    left recursion using :class:`ParserElement.enable_left_recursion<ParserElement.enable_left_recursion>`
+    """
+
+    def __init__(self, parseElementList):
+        self.parseElementTrace = parseElementList
+
+    def __str__(self) -> str:
+        return "RecursiveGrammarException: {}".format(self.parseElementTrace)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/helpers.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/helpers.py
new file mode 100644
index 0000000..9588b3b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/helpers.py
@@ -0,0 +1,1088 @@
+# helpers.py
+import html.entities
+import re
+import typing
+
+from . import __diag__
+from .core import *
+from .util import _bslash, _flatten, _escape_regex_range_chars
+
+
+#
+# global helpers
+#
+def delimited_list(
+    expr: Union[str, ParserElement],
+    delim: Union[str, ParserElement] = ",",
+    combine: bool = False,
+    min: typing.Optional[int] = None,
+    max: typing.Optional[int] = None,
+    *,
+    allow_trailing_delim: bool = False,
+) -> ParserElement:
+    """Helper to define a delimited list of expressions - the delimiter
+    defaults to ','. By default, the list elements and delimiters can
+    have intervening whitespace, and comments, but this can be
+    overridden by passing ``combine=True`` in the constructor. If
+    ``combine`` is set to ``True``, the matching tokens are
+    returned as a single token string, with the delimiters included;
+    otherwise, the matching tokens are returned as a list of tokens,
+    with the delimiters suppressed.
+
+    If ``allow_trailing_delim`` is set to True, then the list may end with
+    a delimiter.
+
+    Example::
+
+        delimited_list(Word(alphas)).parse_string("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimited_list(Word(hexnums), delim=':', combine=True).parse_string("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    if isinstance(expr, str_type):
+        expr = ParserElement._literalStringClass(expr)
+
+    dlName = "{expr} [{delim} {expr}]...{end}".format(
+        expr=str(expr.copy().streamline()),
+        delim=str(delim),
+        end=" [{}]".format(str(delim)) if allow_trailing_delim else "",
+    )
+
+    if not combine:
+        delim = Suppress(delim)
+
+    if min is not None:
+        if min < 1:
+            raise ValueError("min must be greater than 0")
+        min -= 1
+    if max is not None:
+        if min is not None and max <= min:
+            raise ValueError("max must be greater than, or equal to min")
+        max -= 1
+    delimited_list_expr = expr + (delim + expr)[min, max]
+
+    if allow_trailing_delim:
+        delimited_list_expr += Opt(delim)
+
+    if combine:
+        return Combine(delimited_list_expr).set_name(dlName)
+    else:
+        return delimited_list_expr.set_name(dlName)
+
+
+def counted_array(
+    expr: ParserElement,
+    int_expr: typing.Optional[ParserElement] = None,
+    *,
+    intExpr: typing.Optional[ParserElement] = None,
+) -> ParserElement:
+    """Helper to define a counted list of expressions.
+
+    This helper defines a pattern of the form::
+
+        integer expr expr expr...
+
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the
+    leading count token is suppressed.
+
+    If ``int_expr`` is specified, it should be a pyparsing expression
+    that produces an integer value.
+
+    Example::
+
+        counted_array(Word(alphas)).parse_string('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binary_constant = Word('01').set_parse_action(lambda t: int(t[0], 2))
+        counted_array(Word(alphas), int_expr=binary_constant).parse_string('10 ab cd ef')  # -> ['ab', 'cd']
+
+        # if other fields must be parsed after the count but before the
+        # list items, give the fields results names and they will
+        # be preserved in the returned ParseResults:
+        count_with_metadata = integer + Word(alphas)("type")
+        typed_array = counted_array(Word(alphanums), int_expr=count_with_metadata)("items")
+        result = typed_array.parse_string("3 bool True True False")
+        print(result.dump())
+
+        # prints
+        # ['True', 'True', 'False']
+        # - items: ['True', 'True', 'False']
+        # - type: 'bool'
+    """
+    intExpr = intExpr or int_expr
+    array_expr = Forward()
+
+    def count_field_parse_action(s, l, t):
+        nonlocal array_expr
+        n = t[0]
+        array_expr <<= (expr * n) if n else Empty()
+        # clear list contents, but keep any named results
+        del t[:]
+
+    if intExpr is None:
+        intExpr = Word(nums).set_parse_action(lambda t: int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.set_name("arrayLen")
+    intExpr.add_parse_action(count_field_parse_action, call_during_try=True)
+    return (intExpr + array_expr).set_name("(len) " + str(expr) + "...")
+
+
+def match_previous_literal(expr: ParserElement) -> ParserElement:
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = match_previous_literal(first)
+        match_expr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches a previous literal, will also match the leading
+    ``"1:1"`` in ``"1:10"``. If this is not desired, use
+    :class:`match_previous_expr`. Do *not* use with packrat parsing
+    enabled.
+    """
+    rep = Forward()
+
+    def copy_token_to_repeater(s, l, t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.as_list())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+
+    expr.add_parse_action(copy_token_to_repeater, callDuringTry=True)
+    rep.set_name("(prev) " + str(expr))
+    return rep
+
+
+def match_previous_expr(expr: ParserElement) -> ParserElement:
+    """Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks for
+    a 'repeat' of a previous expression.  For example::
+
+        first = Word(nums)
+        second = match_previous_expr(first)
+        match_expr = first + ":" + second
+
+    will match ``"1:1"``, but not ``"1:2"``.  Because this
+    matches by expressions, will *not* match the leading ``"1:1"``
+    in ``"1:10"``; the expressions are evaluated first, and then
+    compared, so ``"1"`` is compared with ``"10"``. Do *not* use
+    with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+
+    def copy_token_to_repeater(s, l, t):
+        matchTokens = _flatten(t.as_list())
+
+        def must_match_these_tokens(s, l, t):
+            theseTokens = _flatten(t.as_list())
+            if theseTokens != matchTokens:
+                raise ParseException(
+                    s, l, "Expected {}, found{}".format(matchTokens, theseTokens)
+                )
+
+        rep.set_parse_action(must_match_these_tokens, callDuringTry=True)
+
+    expr.add_parse_action(copy_token_to_repeater, callDuringTry=True)
+    rep.set_name("(prev) " + str(expr))
+    return rep
+
+
+def one_of(
+    strs: Union[typing.Iterable[str], str],
+    caseless: bool = False,
+    use_regex: bool = True,
+    as_keyword: bool = False,
+    *,
+    useRegex: bool = True,
+    asKeyword: bool = False,
+) -> ParserElement:
+    """Helper to quickly define a set of alternative :class:`Literal` s,
+    and makes sure to do longest-first testing when there is a conflict,
+    regardless of the input order, but returns
+    a :class:`MatchFirst` for best performance.
+
+    Parameters:
+
+    - ``strs`` - a string of space-delimited literals, or a collection of
+      string literals
+    - ``caseless`` - treat all literals as caseless - (default= ``False``)
+    - ``use_regex`` - as an optimization, will
+      generate a :class:`Regex` object; otherwise, will generate
+      a :class:`MatchFirst` object (if ``caseless=True`` or ``asKeyword=True``, or if
+      creating a :class:`Regex` raises an exception) - (default= ``True``)
+    - ``as_keyword`` - enforce :class:`Keyword`-style matching on the
+      generated expressions - (default= ``False``)
+    - ``asKeyword`` and ``useRegex`` are retained for pre-PEP8 compatibility,
+      but will be removed in a future release
+
+    Example::
+
+        comp_oper = one_of("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.search_string("B = 12  AA=23 B<=AA AA>12"))
+
+    prints::
+
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    asKeyword = asKeyword or as_keyword
+    useRegex = useRegex and use_regex
+
+    if (
+        isinstance(caseless, str_type)
+        and __diag__.warn_on_multiple_string_args_to_oneof
+    ):
+        warnings.warn(
+            "More than one string argument passed to one_of, pass"
+            " choices as a list or space-delimited string",
+            stacklevel=2,
+        )
+
+    if caseless:
+        isequal = lambda a, b: a.upper() == b.upper()
+        masks = lambda a, b: b.upper().startswith(a.upper())
+        parseElementClass = CaselessKeyword if asKeyword else CaselessLiteral
+    else:
+        isequal = lambda a, b: a == b
+        masks = lambda a, b: b.startswith(a)
+        parseElementClass = Keyword if asKeyword else Literal
+
+    symbols: List[str] = []
+    if isinstance(strs, str_type):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        raise TypeError("Invalid argument to one_of, expected string or iterable")
+    if not symbols:
+        return NoMatch()
+
+    # reorder given symbols to take care to avoid masking longer choices with shorter ones
+    # (but only if the given symbols are not just single characters)
+    if any(len(sym) > 1 for sym in symbols):
+        i = 0
+        while i < len(symbols) - 1:
+            cur = symbols[i]
+            for j, other in enumerate(symbols[i + 1 :]):
+                if isequal(other, cur):
+                    del symbols[i + j + 1]
+                    break
+                elif masks(cur, other):
+                    del symbols[i + j + 1]
+                    symbols.insert(i, other)
+                    break
+            else:
+                i += 1
+
+    if useRegex:
+        re_flags: int = re.IGNORECASE if caseless else 0
+
+        try:
+            if all(len(sym) == 1 for sym in symbols):
+                # symbols are just single characters, create range regex pattern
+                patt = "[{}]".format(
+                    "".join(_escape_regex_range_chars(sym) for sym in symbols)
+                )
+            else:
+                patt = "|".join(re.escape(sym) for sym in symbols)
+
+            # wrap with \b word break markers if defining as keywords
+            if asKeyword:
+                patt = r"\b(?:{})\b".format(patt)
+
+            ret = Regex(patt, flags=re_flags).set_name(" | ".join(symbols))
+
+            if caseless:
+                # add parse action to return symbols as specified, not in random
+                # casing as found in input string
+                symbol_map = {sym.lower(): sym for sym in symbols}
+                ret.add_parse_action(lambda s, l, t: symbol_map[t[0].lower()])
+
+            return ret
+
+        except re.error:
+            warnings.warn(
+                "Exception creating Regex for one_of, building MatchFirst", stacklevel=2
+            )
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).set_name(
+        " | ".join(symbols)
+    )
+
+
+def dict_of(key: ParserElement, value: ParserElement) -> ParserElement:
+    """Helper to easily and clearly define a dictionary by specifying
+    the respective patterns for the key and value.  Takes care of
+    defining the :class:`Dict`, :class:`ZeroOrMore`, and
+    :class:`Group` tokens in the proper order.  The key pattern
+    can include delimiting markers or punctuation, as long as they are
+    suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the :class:`Dict` results
+    can include named token fields.
+
+    Example::
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join))
+        print(attr_expr[1, ...].parse_string(text).dump())
+
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stop_on=label).set_parse_action(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dict_of(attr_label, attr_value).parse_string(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.as_dict())
+
+    prints::
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: 'light blue'
+        - posn: 'upper left'
+        - shape: 'SQUARE'
+        - texture: 'burlap'
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict(OneOrMore(Group(key + value)))
+
+
+def original_text_for(
+    expr: ParserElement, as_string: bool = True, *, asString: bool = True
+) -> ParserElement:
+    """Helper to return the original, untokenized text for a given
+    expression.  Useful to restore the parsed fields of an HTML start
+    tag into the raw tag text itself, or to revert separate tokens with
+    intervening whitespace back to the original matching input text. By
+    default, returns astring containing the original parsed text.
+
+    If the optional ``as_string`` argument is passed as
+    ``False``, then the return value is
+    a :class:`ParseResults` containing any results names that
+    were originally matched, and a single token containing the original
+    matched text from the input string.  So if the expression passed to
+    :class:`original_text_for` contains expressions with defined
+    results names, you must set ``as_string`` to ``False`` if you
+    want to preserve those results name values.
+
+    The ``asString`` pre-PEP8 argument is retained for compatibility,
+    but will be removed in a future release.
+
+    Example::
+
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b", "i"):
+            opener, closer = make_html_tags(tag)
+            patt = original_text_for(opener + SkipTo(closer) + closer)
+            print(patt.search_string(src)[0])
+
+    prints::
+
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    asString = asString and as_string
+
+    locMarker = Empty().set_parse_action(lambda s, loc, t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s, l, t: s[t._original_start : t._original_end]
+    else:
+
+        def extractText(s, l, t):
+            t[:] = [s[t.pop("_original_start") : t.pop("_original_end")]]
+
+    matchExpr.set_parse_action(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    matchExpr.suppress_warning(Diagnostics.warn_ungrouped_named_tokens_in_collection)
+    return matchExpr
+
+
+def ungroup(expr: ParserElement) -> ParserElement:
+    """Helper to undo pyparsing's default grouping of And expressions,
+    even if all but one are non-empty.
+    """
+    return TokenConverter(expr).add_parse_action(lambda t: t[0])
+
+
+def locatedExpr(expr: ParserElement) -> ParserElement:
+    """
+    (DEPRECATED - future code should use the Located class)
+    Helper to decorate a returned token with its starting and ending
+    locations in the input string.
+
+    This helper adds the following results names:
+
+    - ``locn_start`` - location where matched expression begins
+    - ``locn_end`` - location where matched expression ends
+    - ``value`` - the actual parsed results
+
+    Be careful if the input text contains ``<TAB>`` characters, you
+    may want to call :class:`ParserElement.parseWithTabs`
+
+    Example::
+
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+
+    prints::
+
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().set_parse_action(lambda ss, ll, tt: ll)
+    return Group(
+        locator("locn_start")
+        + expr("value")
+        + locator.copy().leaveWhitespace()("locn_end")
+    )
+
+
+def nested_expr(
+    opener: Union[str, ParserElement] = "(",
+    closer: Union[str, ParserElement] = ")",
+    content: typing.Optional[ParserElement] = None,
+    ignore_expr: ParserElement = quoted_string(),
+    *,
+    ignoreExpr: ParserElement = quoted_string(),
+) -> ParserElement:
+    """Helper method for defining nested lists enclosed in opening and
+    closing delimiters (``"("`` and ``")"`` are the default).
+
+    Parameters:
+    - ``opener`` - opening character for a nested list
+      (default= ``"("``); can also be a pyparsing expression
+    - ``closer`` - closing character for a nested list
+      (default= ``")"``); can also be a pyparsing expression
+    - ``content`` - expression for items within the nested lists
+      (default= ``None``)
+    - ``ignore_expr`` - expression for ignoring opening and closing delimiters
+      (default= :class:`quoted_string`)
+    - ``ignoreExpr`` - this pre-PEP8 argument is retained for compatibility
+      but will be removed in a future release
+
+    If an expression is not provided for the content argument, the
+    nested expression will capture all whitespace-delimited content
+    between delimiters as a list of separate values.
+
+    Use the ``ignore_expr`` argument to define expressions that may
+    contain opening or closing characters that should not be treated as
+    opening or closing characters for nesting, such as quoted_string or
+    a comment expression.  Specify multiple expressions using an
+    :class:`Or` or :class:`MatchFirst`. The default is
+    :class:`quoted_string`, but if no expressions are to be ignored, then
+    pass ``None`` for this argument.
+
+    Example::
+
+        data_type = one_of("void int short long char float double")
+        decl_data_type = Combine(data_type + Opt(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR, RPAR = map(Suppress, "()")
+
+        code_body = nested_expr('{', '}', ignore_expr=(quoted_string | c_style_comment))
+
+        c_function = (decl_data_type("type")
+                      + ident("name")
+                      + LPAR + Opt(delimited_list(arg), [])("args") + RPAR
+                      + code_body("body"))
+        c_function.ignore(c_style_comment)
+
+        source_code = '''
+            int is_odd(int x) {
+                return (x%2);
+            }
+
+            int dec_to_hex(char hchar) {
+                if (hchar >= '0' && hchar <= '9') {
+                    return (ord(hchar)-ord('0'));
+                } else {
+                    return (10+ord(hchar)-ord('A'));
+                }
+            }
+        '''
+        for func in c_function.search_string(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+
+    prints::
+
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if ignoreExpr != ignore_expr:
+        ignoreExpr = ignore_expr if ignoreExpr == quoted_string() else ignoreExpr
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener, str_type) and isinstance(closer, str_type):
+            if len(opener) == 1 and len(closer) == 1:
+                if ignoreExpr is not None:
+                    content = Combine(
+                        OneOrMore(
+                            ~ignoreExpr
+                            + CharsNotIn(
+                                opener + closer + ParserElement.DEFAULT_WHITE_CHARS,
+                                exact=1,
+                            )
+                        )
+                    ).set_parse_action(lambda t: t[0].strip())
+                else:
+                    content = empty.copy() + CharsNotIn(
+                        opener + closer + ParserElement.DEFAULT_WHITE_CHARS
+                    ).set_parse_action(lambda t: t[0].strip())
+            else:
+                if ignoreExpr is not None:
+                    content = Combine(
+                        OneOrMore(
+                            ~ignoreExpr
+                            + ~Literal(opener)
+                            + ~Literal(closer)
+                            + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1)
+                        )
+                    ).set_parse_action(lambda t: t[0].strip())
+                else:
+                    content = Combine(
+                        OneOrMore(
+                            ~Literal(opener)
+                            + ~Literal(closer)
+                            + CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS, exact=1)
+                        )
+                    ).set_parse_action(lambda t: t[0].strip())
+        else:
+            raise ValueError(
+                "opening and closing arguments must be strings if no content expression is given"
+            )
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group(
+            Suppress(opener) + ZeroOrMore(ignoreExpr | ret | content) + Suppress(closer)
+        )
+    else:
+        ret <<= Group(Suppress(opener) + ZeroOrMore(ret | content) + Suppress(closer))
+    ret.set_name("nested %s%s expression" % (opener, closer))
+    return ret
+
+
+def _makeTags(tagStr, xml, suppress_LT=Suppress("<"), suppress_GT=Suppress(">")):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr, str_type):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas, alphanums + "_-:")
+    if xml:
+        tagAttrValue = dbl_quoted_string.copy().set_parse_action(remove_quotes)
+        openTag = (
+            suppress_LT
+            + tagStr("tag")
+            + Dict(ZeroOrMore(Group(tagAttrName + Suppress("=") + tagAttrValue)))
+            + Opt("/", default=[False])("empty").set_parse_action(
+                lambda s, l, t: t[0] == "/"
+            )
+            + suppress_GT
+        )
+    else:
+        tagAttrValue = quoted_string.copy().set_parse_action(remove_quotes) | Word(
+            printables, exclude_chars=">"
+        )
+        openTag = (
+            suppress_LT
+            + tagStr("tag")
+            + Dict(
+                ZeroOrMore(
+                    Group(
+                        tagAttrName.set_parse_action(lambda t: t[0].lower())
+                        + Opt(Suppress("=") + tagAttrValue)
+                    )
+                )
+            )
+            + Opt("/", default=[False])("empty").set_parse_action(
+                lambda s, l, t: t[0] == "/"
+            )
+            + suppress_GT
+        )
+    closeTag = Combine(Literal("</") + tagStr + ">", adjacent=False)
+
+    openTag.set_name("<%s>" % resname)
+    # add start<tagname> results name in parse action now that ungrouped names are not reported at two levels
+    openTag.add_parse_action(
+        lambda t: t.__setitem__(
+            "start" + "".join(resname.replace(":", " ").title().split()), t.copy()
+        )
+    )
+    closeTag = closeTag(
+        "end" + "".join(resname.replace(":", " ").title().split())
+    ).set_name("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    openTag.tag_body = SkipTo(closeTag())
+    return openTag, closeTag
+
+
+def make_html_tags(
+    tag_str: Union[str, ParserElement]
+) -> Tuple[ParserElement, ParserElement]:
+    """Helper to construct opening and closing tag expressions for HTML,
+    given a tag name. Matches tags in either upper or lower case,
+    attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+
+        text = '<td>More info at the <a href="https://github.com/pyparsing/pyparsing/wiki">pyparsing</a> wiki page</td>'
+        # make_html_tags returns pyparsing expressions for the opening and
+        # closing tags as a 2-tuple
+        a, a_end = make_html_tags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+
+        for link in link_expr.search_string(text):
+            # attributes in the <A> tag (like "href" shown here) are
+            # also accessible as named results
+            print(link.link_text, '->', link.href)
+
+    prints::
+
+        pyparsing -> https://github.com/pyparsing/pyparsing/wiki
+    """
+    return _makeTags(tag_str, False)
+
+
+def make_xml_tags(
+    tag_str: Union[str, ParserElement]
+) -> Tuple[ParserElement, ParserElement]:
+    """Helper to construct opening and closing tag expressions for XML,
+    given a tag name. Matches tags only in the given upper/lower case.
+
+    Example: similar to :class:`make_html_tags`
+    """
+    return _makeTags(tag_str, True)
+
+
+any_open_tag: ParserElement
+any_close_tag: ParserElement
+any_open_tag, any_close_tag = make_html_tags(
+    Word(alphas, alphanums + "_:").set_name("any tag")
+)
+
+_htmlEntityMap = {k.rstrip(";"): v for k, v in html.entities.html5.items()}
+common_html_entity = Regex("&(?P<entity>" + "|".join(_htmlEntityMap) + ");").set_name(
+    "common HTML entity"
+)
+
+
+def replace_html_entity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+
+class OpAssoc(Enum):
+    LEFT = 1
+    RIGHT = 2
+
+
+InfixNotationOperatorArgType = Union[
+    ParserElement, str, Tuple[Union[ParserElement, str], Union[ParserElement, str]]
+]
+InfixNotationOperatorSpec = Union[
+    Tuple[
+        InfixNotationOperatorArgType,
+        int,
+        OpAssoc,
+        typing.Optional[ParseAction],
+    ],
+    Tuple[
+        InfixNotationOperatorArgType,
+        int,
+        OpAssoc,
+    ],
+]
+
+
+def infix_notation(
+    base_expr: ParserElement,
+    op_list: List[InfixNotationOperatorSpec],
+    lpar: Union[str, ParserElement] = Suppress("("),
+    rpar: Union[str, ParserElement] = Suppress(")"),
+) -> ParserElement:
+    """Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary
+    or binary, left- or right-associative.  Parse actions can also be
+    attached to operator expressions. The generated parser will also
+    recognize the use of parentheses to override operator precedences
+    (see example below).
+
+    Note: if you define a deep operator list, you may see performance
+    issues when using infix_notation. See
+    :class:`ParserElement.enable_packrat` for a mechanism to potentially
+    improve your parser performance.
+
+    Parameters:
+    - ``base_expr`` - expression representing the most basic operand to
+      be used in the expression
+    - ``op_list`` - list of tuples, one for each operator precedence level
+      in the expression grammar; each tuple is of the form ``(op_expr,
+      num_operands, right_left_assoc, (optional)parse_action)``, where:
+
+      - ``op_expr`` is the pyparsing expression for the operator; may also
+        be a string, which will be converted to a Literal; if ``num_operands``
+        is 3, ``op_expr`` is a tuple of two expressions, for the two
+        operators separating the 3 terms
+      - ``num_operands`` is the number of terms for this operator (must be 1,
+        2, or 3)
+      - ``right_left_assoc`` is the indicator whether the operator is right
+        or left associative, using the pyparsing-defined constants
+        ``OpAssoc.RIGHT`` and ``OpAssoc.LEFT``.
+      - ``parse_action`` is the parse action to be associated with
+        expressions matching this operator expression (the parse action
+        tuple member may be omitted); if the parse action is passed
+        a tuple or list of functions, this is equivalent to calling
+        ``set_parse_action(*fn)``
+        (:class:`ParserElement.set_parse_action`)
+    - ``lpar`` - expression for matching left-parentheses; if passed as a
+      str, then will be parsed as Suppress(lpar). If lpar is passed as
+      an expression (such as ``Literal('(')``), then it will be kept in
+      the parsed results, and grouped with them. (default= ``Suppress('(')``)
+    - ``rpar`` - expression for matching right-parentheses; if passed as a
+      str, then will be parsed as Suppress(rpar). If rpar is passed as
+      an expression (such as ``Literal(')')``), then it will be kept in
+      the parsed results, and grouped with them. (default= ``Suppress(')')``)
+
+    Example::
+
+        # simple example of four-function arithmetic with ints and
+        # variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier
+
+        arith_expr = infix_notation(integer | varname,
+            [
+            ('-', 1, OpAssoc.RIGHT),
+            (one_of('* /'), 2, OpAssoc.LEFT),
+            (one_of('+ -'), 2, OpAssoc.LEFT),
+            ])
+
+        arith_expr.run_tests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', full_dump=False)
+
+    prints::
+
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    # captive version of FollowedBy that does not do parse actions or capture results names
+    class _FB(FollowedBy):
+        def parseImpl(self, instring, loc, doActions=True):
+            self.expr.try_parse(instring, loc)
+            return loc, []
+
+    _FB.__name__ = "FollowedBy>"
+
+    ret = Forward()
+    if isinstance(lpar, str):
+        lpar = Suppress(lpar)
+    if isinstance(rpar, str):
+        rpar = Suppress(rpar)
+
+    # if lpar and rpar are not suppressed, wrap in group
+    if not (isinstance(rpar, Suppress) and isinstance(rpar, Suppress)):
+        lastExpr = base_expr | Group(lpar + ret + rpar)
+    else:
+        lastExpr = base_expr | (lpar + ret + rpar)
+
+    for i, operDef in enumerate(op_list):
+        opExpr, arity, rightLeftAssoc, pa = (operDef + (None,))[:4]
+        if isinstance(opExpr, str_type):
+            opExpr = ParserElement._literalStringClass(opExpr)
+        if arity == 3:
+            if not isinstance(opExpr, (tuple, list)) or len(opExpr) != 2:
+                raise ValueError(
+                    "if numterms=3, opExpr must be a tuple or list of two expressions"
+                )
+            opExpr1, opExpr2 = opExpr
+            term_name = "{}{} term".format(opExpr1, opExpr2)
+        else:
+            term_name = "{} term".format(opExpr)
+
+        if not 1 <= arity <= 3:
+            raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+
+        if rightLeftAssoc not in (OpAssoc.LEFT, OpAssoc.RIGHT):
+            raise ValueError("operator must indicate right or left associativity")
+
+        thisExpr: Forward = Forward().set_name(term_name)
+        if rightLeftAssoc is OpAssoc.LEFT:
+            if arity == 1:
+                matchExpr = _FB(lastExpr + opExpr) + Group(lastExpr + opExpr[1, ...])
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + lastExpr) + Group(
+                        lastExpr + (opExpr + lastExpr)[1, ...]
+                    )
+                else:
+                    matchExpr = _FB(lastExpr + lastExpr) + Group(lastExpr[2, ...])
+            elif arity == 3:
+                matchExpr = _FB(
+                    lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr
+                ) + Group(lastExpr + OneOrMore(opExpr1 + lastExpr + opExpr2 + lastExpr))
+        elif rightLeftAssoc is OpAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Opt):
+                    opExpr = Opt(opExpr)
+                matchExpr = _FB(opExpr.expr + thisExpr) + Group(opExpr + thisExpr)
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = _FB(lastExpr + opExpr + thisExpr) + Group(
+                        lastExpr + (opExpr + thisExpr)[1, ...]
+                    )
+                else:
+                    matchExpr = _FB(lastExpr + thisExpr) + Group(
+                        lastExpr + thisExpr[1, ...]
+                    )
+            elif arity == 3:
+                matchExpr = _FB(
+                    lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr
+                ) + Group(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr)
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.set_parse_action(*pa)
+            else:
+                matchExpr.set_parse_action(pa)
+        thisExpr <<= (matchExpr | lastExpr).setName(term_name)
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True, backup_stacks=[]):
+    """
+    (DEPRECATED - use IndentedBlock class instead)
+    Helper method for defining space-delimited indentation blocks,
+    such as those used to define block statements in Python source code.
+
+    Parameters:
+
+    - ``blockStatementExpr`` - expression defining syntax of statement that
+      is repeated within the indented block
+    - ``indentStack`` - list created by caller to manage indentation stack
+      (multiple ``statementWithIndentedBlock`` expressions within a single
+      grammar should share a common ``indentStack``)
+    - ``indent`` - boolean indicating whether block must be indented beyond
+      the current level; set to ``False`` for block of left-most statements
+      (default= ``True``)
+
+    A valid block must contain at least one ``blockStatement``.
+
+    (Note that indentedBlock uses internal parse actions which make it
+    incompatible with packrat parsing.)
+
+    Example::
+
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group("(" + Opt(delimitedList(identifier)) + ")") + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group(funcDecl + func_body)
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Opt(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << (funcDef | assignment | identifier)
+
+        module_body = stmt[1, ...]
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+
+    prints::
+
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]]
+    """
+    backup_stacks.append(indentStack[:])
+
+    def reset_stack():
+        indentStack[:] = backup_stacks[-1]
+
+    def checkPeerIndent(s, l, t):
+        if l >= len(s):
+            return
+        curCol = col(l, s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseException(s, l, "illegal nesting")
+            raise ParseException(s, l, "not a peer entry")
+
+    def checkSubIndent(s, l, t):
+        curCol = col(l, s)
+        if curCol > indentStack[-1]:
+            indentStack.append(curCol)
+        else:
+            raise ParseException(s, l, "not a subentry")
+
+    def checkUnindent(s, l, t):
+        if l >= len(s):
+            return
+        curCol = col(l, s)
+        if not (indentStack and curCol in indentStack):
+            raise ParseException(s, l, "not an unindent")
+        if curCol < indentStack[-1]:
+            indentStack.pop()
+
+    NL = OneOrMore(LineEnd().set_whitespace_chars("\t ").suppress())
+    INDENT = (Empty() + Empty().set_parse_action(checkSubIndent)).set_name("INDENT")
+    PEER = Empty().set_parse_action(checkPeerIndent).set_name("")
+    UNDENT = Empty().set_parse_action(checkUnindent).set_name("UNINDENT")
+    if indent:
+        smExpr = Group(
+            Opt(NL)
+            + INDENT
+            + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL))
+            + UNDENT
+        )
+    else:
+        smExpr = Group(
+            Opt(NL)
+            + OneOrMore(PEER + Group(blockStatementExpr) + Opt(NL))
+            + Opt(UNDENT)
+        )
+
+    # add a parse action to remove backup_stack from list of backups
+    smExpr.add_parse_action(
+        lambda: backup_stacks.pop(-1) and None if backup_stacks else None
+    )
+    smExpr.set_fail_action(lambda a, b, c, d: reset_stack())
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.set_name("indented block")
+
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+c_style_comment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/").set_name(
+    "C style comment"
+)
+"Comment of the form ``/* ... */``"
+
+html_comment = Regex(r"<!--[\s\S]*?-->").set_name("HTML comment")
+"Comment of the form ``<!-- ... -->``"
+
+rest_of_line = Regex(r".*").leave_whitespace().set_name("rest of line")
+dbl_slash_comment = Regex(r"//(?:\\\n|[^\n])*").set_name("// comment")
+"Comment of the form ``// ... (to end of line)``"
+
+cpp_style_comment = Combine(
+    Regex(r"/\*(?:[^*]|\*(?!/))*") + "*/" | dbl_slash_comment
+).set_name("C++ style comment")
+"Comment of either form :class:`c_style_comment` or :class:`dbl_slash_comment`"
+
+java_style_comment = cpp_style_comment
+"Same as :class:`cpp_style_comment`"
+
+python_style_comment = Regex(r"#.*").set_name("Python style comment")
+"Comment of the form ``# ... (to end of line)``"
+
+
+# build list of built-in expressions, for future reference if a global default value
+# gets updated
+_builtin_exprs: List[ParserElement] = [
+    v for v in vars().values() if isinstance(v, ParserElement)
+]
+
+
+# pre-PEP8 compatible names
+delimitedList = delimited_list
+countedArray = counted_array
+matchPreviousLiteral = match_previous_literal
+matchPreviousExpr = match_previous_expr
+oneOf = one_of
+dictOf = dict_of
+originalTextFor = original_text_for
+nestedExpr = nested_expr
+makeHTMLTags = make_html_tags
+makeXMLTags = make_xml_tags
+anyOpenTag, anyCloseTag = any_open_tag, any_close_tag
+commonHTMLEntity = common_html_entity
+replaceHTMLEntity = replace_html_entity
+opAssoc = OpAssoc
+infixNotation = infix_notation
+cStyleComment = c_style_comment
+htmlComment = html_comment
+restOfLine = rest_of_line
+dblSlashComment = dbl_slash_comment
+cppStyleComment = cpp_style_comment
+javaStyleComment = java_style_comment
+pythonStyleComment = python_style_comment
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/results.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/results.py
new file mode 100644
index 0000000..00c9421
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/results.py
@@ -0,0 +1,760 @@
+# results.py
+from collections.abc import MutableMapping, Mapping, MutableSequence, Iterator
+import pprint
+from weakref import ref as wkref
+from typing import Tuple, Any
+
+str_type: Tuple[type, ...] = (str, bytes)
+_generator_type = type((_ for _ in ()))
+
+
+class _ParseResultsWithOffset:
+    __slots__ = ["tup"]
+
+    def __init__(self, p1, p2):
+        self.tup = (p1, p2)
+
+    def __getitem__(self, i):
+        return self.tup[i]
+
+    def __getstate__(self):
+        return self.tup
+
+    def __setstate__(self, *args):
+        self.tup = args[0]
+
+
+class ParseResults:
+    """Structured parse results, to provide multiple means of access to
+    the parsed data:
+
+    - as a list (``len(results)``)
+    - by list index (``results[0], results[1]``, etc.)
+    - by attribute (``results.<results_name>`` - see :class:`ParserElement.set_results_name`)
+
+    Example::
+
+        integer = Word(nums)
+        date_str = (integer.set_results_name("year") + '/'
+                    + integer.set_results_name("month") + '/'
+                    + integer.set_results_name("day"))
+        # equivalent form:
+        # date_str = (integer("year") + '/'
+        #             + integer("month") + '/'
+        #             + integer("day"))
+
+        # parse_string returns a ParseResults object
+        result = date_str.parse_string("1999/12/31")
+
+        def test(s, fn=repr):
+            print("{} -> {}".format(s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+
+    prints::
+
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: '31'
+        - month: '12'
+        - year: '1999'
+    """
+
+    _null_values: Tuple[Any, ...] = (None, [], "", ())
+
+    __slots__ = [
+        "_name",
+        "_parent",
+        "_all_names",
+        "_modal",
+        "_toklist",
+        "_tokdict",
+        "__weakref__",
+    ]
+
+    class List(list):
+        """
+        Simple wrapper class to distinguish parsed list results that should be preserved
+        as actual Python lists, instead of being converted to :class:`ParseResults`:
+
+            LBRACK, RBRACK = map(pp.Suppress, "[]")
+            element = pp.Forward()
+            item = ppc.integer
+            element_list = LBRACK + pp.delimited_list(element) + RBRACK
+
+            # add parse actions to convert from ParseResults to actual Python collection types
+            def as_python_list(t):
+                return pp.ParseResults.List(t.as_list())
+            element_list.add_parse_action(as_python_list)
+
+            element <<= item | element_list
+
+            element.run_tests('''
+                100
+                [2,3,4]
+                [[2, 1],3,4]
+                [(2, 1),3,4]
+                (2,3,4)
+                ''', post_parse=lambda s, r: (r[0], type(r[0])))
+
+        prints:
+
+            100
+            (100, <class 'int'>)
+
+            [2,3,4]
+            ([2, 3, 4], <class 'list'>)
+
+            [[2, 1],3,4]
+            ([[2, 1], 3, 4], <class 'list'>)
+
+        (Used internally by :class:`Group` when `aslist=True`.)
+        """
+
+        def __new__(cls, contained=None):
+            if contained is None:
+                contained = []
+
+            if not isinstance(contained, list):
+                raise TypeError(
+                    "{} may only be constructed with a list,"
+                    " not {}".format(cls.__name__, type(contained).__name__)
+                )
+
+            return list.__new__(cls)
+
+    def __new__(cls, toklist=None, name=None, **kwargs):
+        if isinstance(toklist, ParseResults):
+            return toklist
+        self = object.__new__(cls)
+        self._name = None
+        self._parent = None
+        self._all_names = set()
+
+        if toklist is None:
+            self._toklist = []
+        elif isinstance(toklist, (list, _generator_type)):
+            self._toklist = (
+                [toklist[:]]
+                if isinstance(toklist, ParseResults.List)
+                else list(toklist)
+            )
+        else:
+            self._toklist = [toklist]
+        self._tokdict = dict()
+        return self
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__(
+        self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance
+    ):
+        self._modal = modal
+        if name is not None and name != "":
+            if isinstance(name, int):
+                name = str(name)
+            if not modal:
+                self._all_names = {name}
+            self._name = name
+            if toklist not in self._null_values:
+                if isinstance(toklist, (str_type, type)):
+                    toklist = [toklist]
+                if asList:
+                    if isinstance(toklist, ParseResults):
+                        self[name] = _ParseResultsWithOffset(
+                            ParseResults(toklist._toklist), 0
+                        )
+                    else:
+                        self[name] = _ParseResultsWithOffset(
+                            ParseResults(toklist[0]), 0
+                        )
+                    self[name]._name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError, TypeError, IndexError):
+                        if toklist is not self:
+                            self[name] = toklist
+                        else:
+                            self._name = name
+
+    def __getitem__(self, i):
+        if isinstance(i, (int, slice)):
+            return self._toklist[i]
+        else:
+            if i not in self._all_names:
+                return self._tokdict[i][-1][0]
+            else:
+                return ParseResults([v[0] for v in self._tokdict[i]])
+
+    def __setitem__(self, k, v, isinstance=isinstance):
+        if isinstance(v, _ParseResultsWithOffset):
+            self._tokdict[k] = self._tokdict.get(k, list()) + [v]
+            sub = v[0]
+        elif isinstance(k, (int, slice)):
+            self._toklist[k] = v
+            sub = v
+        else:
+            self._tokdict[k] = self._tokdict.get(k, list()) + [
+                _ParseResultsWithOffset(v, 0)
+            ]
+            sub = v
+        if isinstance(sub, ParseResults):
+            sub._parent = wkref(self)
+
+    def __delitem__(self, i):
+        if isinstance(i, (int, slice)):
+            mylen = len(self._toklist)
+            del self._toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i + 1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name, occurrences in self._tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(
+                            value, position - (position > j)
+                        )
+        else:
+            del self._tokdict[i]
+
+    def __contains__(self, k) -> bool:
+        return k in self._tokdict
+
+    def __len__(self) -> int:
+        return len(self._toklist)
+
+    def __bool__(self) -> bool:
+        return not not (self._toklist or self._tokdict)
+
+    def __iter__(self) -> Iterator:
+        return iter(self._toklist)
+
+    def __reversed__(self) -> Iterator:
+        return iter(self._toklist[::-1])
+
+    def keys(self):
+        return iter(self._tokdict)
+
+    def values(self):
+        return (self[k] for k in self.keys())
+
+    def items(self):
+        return ((k, self[k]) for k in self.keys())
+
+    def haskeys(self) -> bool:
+        """
+        Since ``keys()`` returns an iterator, this method is helpful in bypassing
+        code that looks for the existence of any defined results names."""
+        return bool(self._tokdict)
+
+    def pop(self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default= ``last``).
+        Supports both ``list`` and ``dict`` semantics for ``pop()``. If
+        passed no argument or an integer argument, it will use ``list``
+        semantics and pop tokens from the list of parsed tokens. If passed
+        a non-integer argument (most likely a string), it will use ``dict``
+        semantics and pop the corresponding value from any defined results
+        names. A second default return value argument is supported, just as in
+        ``dict.pop()``.
+
+        Example::
+
+            numlist = Word(nums)[...]
+            print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321']
+
+            def remove_first(tokens):
+                tokens.pop(0)
+            numlist.add_parse_action(remove_first)
+            print(numlist.parse_string("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + Word(nums)[1, ...]
+            print(patt.parse_string("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.add_parse_action(remove_LABEL)
+            print(patt.parse_string("AAB 123 321").dump())
+
+        prints::
+
+            ['AAB', '123', '321']
+            - LABEL: 'AAB'
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k, v in kwargs.items():
+            if k == "default":
+                args = (args[0], v)
+            else:
+                raise TypeError(
+                    "pop() got an unexpected keyword argument {!r}".format(k)
+                )
+        if isinstance(args[0], int) or len(args) == 1 or args[0] in self:
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, default_value=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given ``default_value`` or ``None`` if no
+        ``default_value`` is specified.
+
+        Similar to ``dict.get()``.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parse_string("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return default_value
+
+    def insert(self, index, ins_string):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+
+        Similar to ``list.insert()``.
+
+        Example::
+
+            numlist = Word(nums)[...]
+            print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            numlist.add_parse_action(insert_locn)
+            print(numlist.parse_string("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self._toklist.insert(index, ins_string)
+        # fixup indices in token dictionary
+        for name, occurrences in self._tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(
+                    value, position + (position > index)
+                )
+
+    def append(self, item):
+        """
+        Add single element to end of ``ParseResults`` list of elements.
+
+        Example::
+
+            numlist = Word(nums)[...]
+            print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            numlist.add_parse_action(append_sum)
+            print(numlist.parse_string("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self._toklist.append(item)
+
+    def extend(self, itemseq):
+        """
+        Add sequence of elements to end of ``ParseResults`` list of elements.
+
+        Example::
+
+            patt = Word(alphas)[1, ...]
+
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            patt.add_parse_action(make_palindrome)
+            print(patt.parse_string("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self.__iadd__(itemseq)
+        else:
+            self._toklist.extend(itemseq)
+
+    def clear(self):
+        """
+        Clear all elements and results names.
+        """
+        del self._toklist[:]
+        self._tokdict.clear()
+
+    def __getattr__(self, name):
+        try:
+            return self[name]
+        except KeyError:
+            if name.startswith("__"):
+                raise AttributeError(name)
+            return ""
+
+    def __add__(self, other) -> "ParseResults":
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__(self, other) -> "ParseResults":
+        if other._tokdict:
+            offset = len(self._toklist)
+            addoffset = lambda a: offset if a < 0 else a + offset
+            otheritems = other._tokdict.items()
+            otherdictitems = [
+                (k, _ParseResultsWithOffset(v[0], addoffset(v[1])))
+                for k, vlist in otheritems
+                for v in vlist
+            ]
+            for k, v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0], ParseResults):
+                    v[0]._parent = wkref(self)
+
+        self._toklist += other._toklist
+        self._all_names |= other._all_names
+        return self
+
+    def __radd__(self, other) -> "ParseResults":
+        if isinstance(other, int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+
+    def __repr__(self) -> str:
+        return "{}({!r}, {})".format(type(self).__name__, self._toklist, self.as_dict())
+
+    def __str__(self) -> str:
+        return (
+            "["
+            + ", ".join(
+                [
+                    str(i) if isinstance(i, ParseResults) else repr(i)
+                    for i in self._toklist
+                ]
+            )
+            + "]"
+        )
+
+    def _asStringList(self, sep=""):
+        out = []
+        for item in self._toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance(item, ParseResults):
+                out += item._asStringList()
+            else:
+                out.append(str(item))
+        return out
+
+    def as_list(self) -> list:
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+
+            patt = Word(alphas)[1, ...]
+            result = patt.parse_string("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+
+            # Use as_list() to create an actual list
+            result_list = result.as_list()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [
+            res.as_list() if isinstance(res, ParseResults) else res
+            for res in self._toklist
+        ]
+
+    def as_dict(self) -> dict:
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parse_string('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+
+            result_dict = result.as_dict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.as_dict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+
+        def to_item(obj):
+            if isinstance(obj, ParseResults):
+                return obj.as_dict() if obj.haskeys() else [to_item(v) for v in obj]
+            else:
+                return obj
+
+        return dict((k, to_item(v)) for k, v in self.items())
+
+    def copy(self) -> "ParseResults":
+        """
+        Returns a new copy of a :class:`ParseResults` object.
+        """
+        ret = ParseResults(self._toklist)
+        ret._tokdict = self._tokdict.copy()
+        ret._parent = self._parent
+        ret._all_names |= self._all_names
+        ret._name = self._name
+        return ret
+
+    def get_name(self):
+        r"""
+        Returns the results name for this token expression. Useful when several
+        different expressions might match at a particular location.
+
+        Example::
+
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number")
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = user_data[1, ...]
+
+            result = user_info.parse_string("22 111-22-3333 #221B")
+            for item in result:
+                print(item.get_name(), ':', item[0])
+
+        prints::
+
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self._name:
+            return self._name
+        elif self._parent:
+            par = self._parent()
+
+            def find_in_parent(sub):
+                return next(
+                    (
+                        k
+                        for k, vlist in par._tokdict.items()
+                        for v, loc in vlist
+                        if sub is v
+                    ),
+                    None,
+                )
+
+            return find_in_parent(self) if par else None
+        elif (
+            len(self) == 1
+            and len(self._tokdict) == 1
+            and next(iter(self._tokdict.values()))[0][1] in (0, -1)
+        ):
+            return next(iter(self._tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent="", full=True, include_list=True, _depth=0) -> str:
+        """
+        Diagnostic method for listing out the contents of
+        a :class:`ParseResults`. Accepts an optional ``indent`` argument so
+        that this string can be embedded in a nested display of other data.
+
+        Example::
+
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+            result = date_str.parse_string('1999/12/31')
+            print(result.dump())
+
+        prints::
+
+            ['1999', '/', '12', '/', '31']
+            - day: '31'
+            - month: '12'
+            - year: '1999'
+        """
+        out = []
+        NL = "\n"
+        out.append(indent + str(self.as_list()) if include_list else "")
+
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k, v in self.items())
+                for k, v in items:
+                    if out:
+                        out.append(NL)
+                    out.append("{}{}- {}: ".format(indent, ("  " * _depth), k))
+                    if isinstance(v, ParseResults):
+                        if v:
+                            out.append(
+                                v.dump(
+                                    indent=indent,
+                                    full=full,
+                                    include_list=include_list,
+                                    _depth=_depth + 1,
+                                )
+                            )
+                        else:
+                            out.append(str(v))
+                    else:
+                        out.append(repr(v))
+            if any(isinstance(vv, ParseResults) for vv in self):
+                v = self
+                for i, vv in enumerate(v):
+                    if isinstance(vv, ParseResults):
+                        out.append(
+                            "\n{}{}[{}]:\n{}{}{}".format(
+                                indent,
+                                ("  " * (_depth)),
+                                i,
+                                indent,
+                                ("  " * (_depth + 1)),
+                                vv.dump(
+                                    indent=indent,
+                                    full=full,
+                                    include_list=include_list,
+                                    _depth=_depth + 1,
+                                ),
+                            )
+                        )
+                    else:
+                        out.append(
+                            "\n%s%s[%d]:\n%s%s%s"
+                            % (
+                                indent,
+                                ("  " * (_depth)),
+                                i,
+                                indent,
+                                ("  " * (_depth + 1)),
+                                str(vv),
+                            )
+                        )
+
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the
+        `pprint <https://docs.python.org/3/library/pprint.html>`_ module.
+        Accepts additional positional or keyword args as defined for
+        `pprint.pprint <https://docs.python.org/3/library/pprint.html#pprint.pprint>`_ .
+
+        Example::
+
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimited_list(term)))
+            result = func.parse_string("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+
+        prints::
+
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.as_list(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return (
+            self._toklist,
+            (
+                self._tokdict.copy(),
+                self._parent is not None and self._parent() or None,
+                self._all_names,
+                self._name,
+            ),
+        )
+
+    def __setstate__(self, state):
+        self._toklist, (self._tokdict, par, inAccumNames, self._name) = state
+        self._all_names = set(inAccumNames)
+        if par is not None:
+            self._parent = wkref(par)
+        else:
+            self._parent = None
+
+    def __getnewargs__(self):
+        return self._toklist, self._name
+
+    def __dir__(self):
+        return dir(type(self)) + list(self.keys())
+
+    @classmethod
+    def from_dict(cls, other, name=None) -> "ParseResults":
+        """
+        Helper classmethod to construct a ``ParseResults`` from a ``dict``, preserving the
+        name-value relations as results names. If an optional ``name`` argument is
+        given, a nested ``ParseResults`` will be returned.
+        """
+
+        def is_iterable(obj):
+            try:
+                iter(obj)
+            except Exception:
+                return False
+            else:
+                return not isinstance(obj, str_type)
+
+        ret = cls([])
+        for k, v in other.items():
+            if isinstance(v, Mapping):
+                ret += cls.from_dict(v, name=k)
+            else:
+                ret += cls([v], name=k, asList=is_iterable(v))
+        if name is not None:
+            ret = cls([ret], name=name)
+        return ret
+
+    asList = as_list
+    asDict = as_dict
+    getName = get_name
+
+
+MutableMapping.register(ParseResults)
+MutableSequence.register(ParseResults)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/testing.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/testing.py
new file mode 100644
index 0000000..84a0ef1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/testing.py
@@ -0,0 +1,331 @@
+# testing.py
+
+from contextlib import contextmanager
+import typing
+
+from .core import (
+    ParserElement,
+    ParseException,
+    Keyword,
+    __diag__,
+    __compat__,
+)
+
+
+class pyparsing_test:
+    """
+    namespace class for classes useful in writing unit tests
+    """
+
+    class reset_pyparsing_context:
+        """
+        Context manager to be used when writing unit tests that modify pyparsing config values:
+        - packrat parsing
+        - bounded recursion parsing
+        - default whitespace characters.
+        - default keyword characters
+        - literal string auto-conversion class
+        - __diag__ settings
+
+        Example::
+
+            with reset_pyparsing_context():
+                # test that literals used to construct a grammar are automatically suppressed
+                ParserElement.inlineLiteralsUsing(Suppress)
+
+                term = Word(alphas) | Word(nums)
+                group = Group('(' + term[...] + ')')
+
+                # assert that the '()' characters are not included in the parsed tokens
+                self.assertParseAndCheckList(group, "(abc 123 def)", ['abc', '123', 'def'])
+
+            # after exiting context manager, literals are converted to Literal expressions again
+        """
+
+        def __init__(self):
+            self._save_context = {}
+
+        def save(self):
+            self._save_context["default_whitespace"] = ParserElement.DEFAULT_WHITE_CHARS
+            self._save_context["default_keyword_chars"] = Keyword.DEFAULT_KEYWORD_CHARS
+
+            self._save_context[
+                "literal_string_class"
+            ] = ParserElement._literalStringClass
+
+            self._save_context["verbose_stacktrace"] = ParserElement.verbose_stacktrace
+
+            self._save_context["packrat_enabled"] = ParserElement._packratEnabled
+            if ParserElement._packratEnabled:
+                self._save_context[
+                    "packrat_cache_size"
+                ] = ParserElement.packrat_cache.size
+            else:
+                self._save_context["packrat_cache_size"] = None
+            self._save_context["packrat_parse"] = ParserElement._parse
+            self._save_context[
+                "recursion_enabled"
+            ] = ParserElement._left_recursion_enabled
+
+            self._save_context["__diag__"] = {
+                name: getattr(__diag__, name) for name in __diag__._all_names
+            }
+
+            self._save_context["__compat__"] = {
+                "collect_all_And_tokens": __compat__.collect_all_And_tokens
+            }
+
+            return self
+
+        def restore(self):
+            # reset pyparsing global state
+            if (
+                ParserElement.DEFAULT_WHITE_CHARS
+                != self._save_context["default_whitespace"]
+            ):
+                ParserElement.set_default_whitespace_chars(
+                    self._save_context["default_whitespace"]
+                )
+
+            ParserElement.verbose_stacktrace = self._save_context["verbose_stacktrace"]
+
+            Keyword.DEFAULT_KEYWORD_CHARS = self._save_context["default_keyword_chars"]
+            ParserElement.inlineLiteralsUsing(
+                self._save_context["literal_string_class"]
+            )
+
+            for name, value in self._save_context["__diag__"].items():
+                (__diag__.enable if value else __diag__.disable)(name)
+
+            ParserElement._packratEnabled = False
+            if self._save_context["packrat_enabled"]:
+                ParserElement.enable_packrat(self._save_context["packrat_cache_size"])
+            else:
+                ParserElement._parse = self._save_context["packrat_parse"]
+            ParserElement._left_recursion_enabled = self._save_context[
+                "recursion_enabled"
+            ]
+
+            __compat__.collect_all_And_tokens = self._save_context["__compat__"]
+
+            return self
+
+        def copy(self):
+            ret = type(self)()
+            ret._save_context.update(self._save_context)
+            return ret
+
+        def __enter__(self):
+            return self.save()
+
+        def __exit__(self, *args):
+            self.restore()
+
+    class TestParseResultsAsserts:
+        """
+        A mixin class to add parse results assertion methods to normal unittest.TestCase classes.
+        """
+
+        def assertParseResultsEquals(
+            self, result, expected_list=None, expected_dict=None, msg=None
+        ):
+            """
+            Unit test assertion to compare a :class:`ParseResults` object with an optional ``expected_list``,
+            and compare any defined results names with an optional ``expected_dict``.
+            """
+            if expected_list is not None:
+                self.assertEqual(expected_list, result.as_list(), msg=msg)
+            if expected_dict is not None:
+                self.assertEqual(expected_dict, result.as_dict(), msg=msg)
+
+        def assertParseAndCheckList(
+            self, expr, test_string, expected_list, msg=None, verbose=True
+        ):
+            """
+            Convenience wrapper assert to test a parser element and input string, and assert that
+            the resulting ``ParseResults.asList()`` is equal to the ``expected_list``.
+            """
+            result = expr.parse_string(test_string, parse_all=True)
+            if verbose:
+                print(result.dump())
+            else:
+                print(result.as_list())
+            self.assertParseResultsEquals(result, expected_list=expected_list, msg=msg)
+
+        def assertParseAndCheckDict(
+            self, expr, test_string, expected_dict, msg=None, verbose=True
+        ):
+            """
+            Convenience wrapper assert to test a parser element and input string, and assert that
+            the resulting ``ParseResults.asDict()`` is equal to the ``expected_dict``.
+            """
+            result = expr.parse_string(test_string, parseAll=True)
+            if verbose:
+                print(result.dump())
+            else:
+                print(result.as_list())
+            self.assertParseResultsEquals(result, expected_dict=expected_dict, msg=msg)
+
+        def assertRunTestResults(
+            self, run_tests_report, expected_parse_results=None, msg=None
+        ):
+            """
+            Unit test assertion to evaluate output of ``ParserElement.runTests()``. If a list of
+            list-dict tuples is given as the ``expected_parse_results`` argument, then these are zipped
+            with the report tuples returned by ``runTests`` and evaluated using ``assertParseResultsEquals``.
+            Finally, asserts that the overall ``runTests()`` success value is ``True``.
+
+            :param run_tests_report: tuple(bool, [tuple(str, ParseResults or Exception)]) returned from runTests
+            :param expected_parse_results (optional): [tuple(str, list, dict, Exception)]
+            """
+            run_test_success, run_test_results = run_tests_report
+
+            if expected_parse_results is not None:
+                merged = [
+                    (*rpt, expected)
+                    for rpt, expected in zip(run_test_results, expected_parse_results)
+                ]
+                for test_string, result, expected in merged:
+                    # expected should be a tuple containing a list and/or a dict or an exception,
+                    # and optional failure message string
+                    # an empty tuple will skip any result validation
+                    fail_msg = next(
+                        (exp for exp in expected if isinstance(exp, str)), None
+                    )
+                    expected_exception = next(
+                        (
+                            exp
+                            for exp in expected
+                            if isinstance(exp, type) and issubclass(exp, Exception)
+                        ),
+                        None,
+                    )
+                    if expected_exception is not None:
+                        with self.assertRaises(
+                            expected_exception=expected_exception, msg=fail_msg or msg
+                        ):
+                            if isinstance(result, Exception):
+                                raise result
+                    else:
+                        expected_list = next(
+                            (exp for exp in expected if isinstance(exp, list)), None
+                        )
+                        expected_dict = next(
+                            (exp for exp in expected if isinstance(exp, dict)), None
+                        )
+                        if (expected_list, expected_dict) != (None, None):
+                            self.assertParseResultsEquals(
+                                result,
+                                expected_list=expected_list,
+                                expected_dict=expected_dict,
+                                msg=fail_msg or msg,
+                            )
+                        else:
+                            # warning here maybe?
+                            print("no validation for {!r}".format(test_string))
+
+            # do this last, in case some specific test results can be reported instead
+            self.assertTrue(
+                run_test_success, msg=msg if msg is not None else "failed runTests"
+            )
+
+        @contextmanager
+        def assertRaisesParseException(self, exc_type=ParseException, msg=None):
+            with self.assertRaises(exc_type, msg=msg):
+                yield
+
+    @staticmethod
+    def with_line_numbers(
+        s: str,
+        start_line: typing.Optional[int] = None,
+        end_line: typing.Optional[int] = None,
+        expand_tabs: bool = True,
+        eol_mark: str = "|",
+        mark_spaces: typing.Optional[str] = None,
+        mark_control: typing.Optional[str] = None,
+    ) -> str:
+        """
+        Helpful method for debugging a parser - prints a string with line and column numbers.
+        (Line and column numbers are 1-based.)
+
+        :param s: tuple(bool, str - string to be printed with line and column numbers
+        :param start_line: int - (optional) starting line number in s to print (default=1)
+        :param end_line: int - (optional) ending line number in s to print (default=len(s))
+        :param expand_tabs: bool - (optional) expand tabs to spaces, to match the pyparsing default
+        :param eol_mark: str - (optional) string to mark the end of lines, helps visualize trailing spaces (default="|")
+        :param mark_spaces: str - (optional) special character to display in place of spaces
+        :param mark_control: str - (optional) convert non-printing control characters to a placeholding
+                                 character; valid values:
+                                 - "unicode" - replaces control chars with Unicode symbols, such as "␍" and "␊"
+                                 - any single character string - replace control characters with given string
+                                 - None (default) - string is displayed as-is
+
+        :return: str - input string with leading line numbers and column number headers
+        """
+        if expand_tabs:
+            s = s.expandtabs()
+        if mark_control is not None:
+            if mark_control == "unicode":
+                tbl = str.maketrans(
+                    {c: u for c, u in zip(range(0, 33), range(0x2400, 0x2433))}
+                    | {127: 0x2421}
+                )
+                eol_mark = ""
+            else:
+                tbl = str.maketrans(
+                    {c: mark_control for c in list(range(0, 32)) + [127]}
+                )
+            s = s.translate(tbl)
+        if mark_spaces is not None and mark_spaces != " ":
+            if mark_spaces == "unicode":
+                tbl = str.maketrans({9: 0x2409, 32: 0x2423})
+                s = s.translate(tbl)
+            else:
+                s = s.replace(" ", mark_spaces)
+        if start_line is None:
+            start_line = 1
+        if end_line is None:
+            end_line = len(s)
+        end_line = min(end_line, len(s))
+        start_line = min(max(1, start_line), end_line)
+
+        if mark_control != "unicode":
+            s_lines = s.splitlines()[start_line - 1 : end_line]
+        else:
+            s_lines = [line + "␊" for line in s.split("␊")[start_line - 1 : end_line]]
+        if not s_lines:
+            return ""
+
+        lineno_width = len(str(end_line))
+        max_line_len = max(len(line) for line in s_lines)
+        lead = " " * (lineno_width + 1)
+        if max_line_len >= 99:
+            header0 = (
+                lead
+                + "".join(
+                    "{}{}".format(" " * 99, (i + 1) % 100)
+                    for i in range(max(max_line_len // 100, 1))
+                )
+                + "\n"
+            )
+        else:
+            header0 = ""
+        header1 = (
+            header0
+            + lead
+            + "".join(
+                "         {}".format((i + 1) % 10)
+                for i in range(-(-max_line_len // 10))
+            )
+            + "\n"
+        )
+        header2 = lead + "1234567890" * (-(-max_line_len // 10)) + "\n"
+        return (
+            header1
+            + header2
+            + "\n".join(
+                "{:{}d}:{}{}".format(i, lineno_width, line, eol_mark)
+                for i, line in enumerate(s_lines, start=start_line)
+            )
+            + "\n"
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/unicode.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/unicode.py
new file mode 100644
index 0000000..0652620
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/unicode.py
@@ -0,0 +1,352 @@
+# unicode.py
+
+import sys
+from itertools import filterfalse
+from typing import List, Tuple, Union
+
+
+class _lazyclassproperty:
+    def __init__(self, fn):
+        self.fn = fn
+        self.__doc__ = fn.__doc__
+        self.__name__ = fn.__name__
+
+    def __get__(self, obj, cls):
+        if cls is None:
+            cls = type(obj)
+        if not hasattr(cls, "_intern") or any(
+            cls._intern is getattr(superclass, "_intern", [])
+            for superclass in cls.__mro__[1:]
+        ):
+            cls._intern = {}
+        attrname = self.fn.__name__
+        if attrname not in cls._intern:
+            cls._intern[attrname] = self.fn(cls)
+        return cls._intern[attrname]
+
+
+UnicodeRangeList = List[Union[Tuple[int, int], Tuple[int]]]
+
+
+class unicode_set:
+    """
+    A set of Unicode characters, for language-specific strings for
+    ``alphas``, ``nums``, ``alphanums``, and ``printables``.
+    A unicode_set is defined by a list of ranges in the Unicode character
+    set, in a class attribute ``_ranges``. Ranges can be specified using
+    2-tuples or a 1-tuple, such as::
+
+        _ranges = [
+            (0x0020, 0x007e),
+            (0x00a0, 0x00ff),
+            (0x0100,),
+            ]
+
+    Ranges are left- and right-inclusive. A 1-tuple of (x,) is treated as (x, x).
+
+    A unicode set can also be defined using multiple inheritance of other unicode sets::
+
+        class CJK(Chinese, Japanese, Korean):
+            pass
+    """
+
+    _ranges: UnicodeRangeList = []
+
+    @_lazyclassproperty
+    def _chars_for_ranges(cls):
+        ret = []
+        for cc in cls.__mro__:
+            if cc is unicode_set:
+                break
+            for rr in getattr(cc, "_ranges", ()):
+                ret.extend(range(rr[0], rr[-1] + 1))
+        return [chr(c) for c in sorted(set(ret))]
+
+    @_lazyclassproperty
+    def printables(cls):
+        "all non-whitespace characters in this range"
+        return "".join(filterfalse(str.isspace, cls._chars_for_ranges))
+
+    @_lazyclassproperty
+    def alphas(cls):
+        "all alphabetic characters in this range"
+        return "".join(filter(str.isalpha, cls._chars_for_ranges))
+
+    @_lazyclassproperty
+    def nums(cls):
+        "all numeric digit characters in this range"
+        return "".join(filter(str.isdigit, cls._chars_for_ranges))
+
+    @_lazyclassproperty
+    def alphanums(cls):
+        "all alphanumeric characters in this range"
+        return cls.alphas + cls.nums
+
+    @_lazyclassproperty
+    def identchars(cls):
+        "all characters in this range that are valid identifier characters, plus underscore '_'"
+        return "".join(
+            sorted(
+                set(
+                    "".join(filter(str.isidentifier, cls._chars_for_ranges))
+                    + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyzªµº"
+                    + "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ"
+                    + "_"
+                )
+            )
+        )
+
+    @_lazyclassproperty
+    def identbodychars(cls):
+        """
+        all characters in this range that are valid identifier body characters,
+        plus the digits 0-9
+        """
+        return "".join(
+            sorted(
+                set(
+                    cls.identchars
+                    + "0123456789"
+                    + "".join(
+                        [c for c in cls._chars_for_ranges if ("_" + c).isidentifier()]
+                    )
+                )
+            )
+        )
+
+
+class pyparsing_unicode(unicode_set):
+    """
+    A namespace class for defining common language unicode_sets.
+    """
+
+    # fmt: off
+
+    # define ranges in language character sets
+    _ranges: UnicodeRangeList = [
+        (0x0020, sys.maxunicode),
+    ]
+
+    class BasicMultilingualPlane(unicode_set):
+        "Unicode set for the Basic Multilingual Plane"
+        _ranges: UnicodeRangeList = [
+            (0x0020, 0xFFFF),
+        ]
+
+    class Latin1(unicode_set):
+        "Unicode set for Latin-1 Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0020, 0x007E),
+            (0x00A0, 0x00FF),
+        ]
+
+    class LatinA(unicode_set):
+        "Unicode set for Latin-A Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0100, 0x017F),
+        ]
+
+    class LatinB(unicode_set):
+        "Unicode set for Latin-B Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0180, 0x024F),
+        ]
+
+    class Greek(unicode_set):
+        "Unicode set for Greek Unicode Character Ranges"
+        _ranges: UnicodeRangeList = [
+            (0x0342, 0x0345),
+            (0x0370, 0x0377),
+            (0x037A, 0x037F),
+            (0x0384, 0x038A),
+            (0x038C,),
+            (0x038E, 0x03A1),
+            (0x03A3, 0x03E1),
+            (0x03F0, 0x03FF),
+            (0x1D26, 0x1D2A),
+            (0x1D5E,),
+            (0x1D60,),
+            (0x1D66, 0x1D6A),
+            (0x1F00, 0x1F15),
+            (0x1F18, 0x1F1D),
+            (0x1F20, 0x1F45),
+            (0x1F48, 0x1F4D),
+            (0x1F50, 0x1F57),
+            (0x1F59,),
+            (0x1F5B,),
+            (0x1F5D,),
+            (0x1F5F, 0x1F7D),
+            (0x1F80, 0x1FB4),
+            (0x1FB6, 0x1FC4),
+            (0x1FC6, 0x1FD3),
+            (0x1FD6, 0x1FDB),
+            (0x1FDD, 0x1FEF),
+            (0x1FF2, 0x1FF4),
+            (0x1FF6, 0x1FFE),
+            (0x2129,),
+            (0x2719, 0x271A),
+            (0xAB65,),
+            (0x10140, 0x1018D),
+            (0x101A0,),
+            (0x1D200, 0x1D245),
+            (0x1F7A1, 0x1F7A7),
+        ]
+
+    class Cyrillic(unicode_set):
+        "Unicode set for Cyrillic Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0400, 0x052F),
+            (0x1C80, 0x1C88),
+            (0x1D2B,),
+            (0x1D78,),
+            (0x2DE0, 0x2DFF),
+            (0xA640, 0xA672),
+            (0xA674, 0xA69F),
+            (0xFE2E, 0xFE2F),
+        ]
+
+    class Chinese(unicode_set):
+        "Unicode set for Chinese Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x2E80, 0x2E99),
+            (0x2E9B, 0x2EF3),
+            (0x31C0, 0x31E3),
+            (0x3400, 0x4DB5),
+            (0x4E00, 0x9FEF),
+            (0xA700, 0xA707),
+            (0xF900, 0xFA6D),
+            (0xFA70, 0xFAD9),
+            (0x16FE2, 0x16FE3),
+            (0x1F210, 0x1F212),
+            (0x1F214, 0x1F23B),
+            (0x1F240, 0x1F248),
+            (0x20000, 0x2A6D6),
+            (0x2A700, 0x2B734),
+            (0x2B740, 0x2B81D),
+            (0x2B820, 0x2CEA1),
+            (0x2CEB0, 0x2EBE0),
+            (0x2F800, 0x2FA1D),
+        ]
+
+    class Japanese(unicode_set):
+        "Unicode set for Japanese Unicode Character Range, combining Kanji, Hiragana, and Katakana ranges"
+        _ranges: UnicodeRangeList = []
+
+        class Kanji(unicode_set):
+            "Unicode set for Kanji Unicode Character Range"
+            _ranges: UnicodeRangeList = [
+                (0x4E00, 0x9FBF),
+                (0x3000, 0x303F),
+            ]
+
+        class Hiragana(unicode_set):
+            "Unicode set for Hiragana Unicode Character Range"
+            _ranges: UnicodeRangeList = [
+                (0x3041, 0x3096),
+                (0x3099, 0x30A0),
+                (0x30FC,),
+                (0xFF70,),
+                (0x1B001,),
+                (0x1B150, 0x1B152),
+                (0x1F200,),
+            ]
+
+        class Katakana(unicode_set):
+            "Unicode set for Katakana  Unicode Character Range"
+            _ranges: UnicodeRangeList = [
+                (0x3099, 0x309C),
+                (0x30A0, 0x30FF),
+                (0x31F0, 0x31FF),
+                (0x32D0, 0x32FE),
+                (0xFF65, 0xFF9F),
+                (0x1B000,),
+                (0x1B164, 0x1B167),
+                (0x1F201, 0x1F202),
+                (0x1F213,),
+            ]
+
+    class Hangul(unicode_set):
+        "Unicode set for Hangul (Korean) Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x1100, 0x11FF),
+            (0x302E, 0x302F),
+            (0x3131, 0x318E),
+            (0x3200, 0x321C),
+            (0x3260, 0x327B),
+            (0x327E,),
+            (0xA960, 0xA97C),
+            (0xAC00, 0xD7A3),
+            (0xD7B0, 0xD7C6),
+            (0xD7CB, 0xD7FB),
+            (0xFFA0, 0xFFBE),
+            (0xFFC2, 0xFFC7),
+            (0xFFCA, 0xFFCF),
+            (0xFFD2, 0xFFD7),
+            (0xFFDA, 0xFFDC),
+        ]
+
+    Korean = Hangul
+
+    class CJK(Chinese, Japanese, Hangul):
+        "Unicode set for combined Chinese, Japanese, and Korean (CJK) Unicode Character Range"
+
+    class Thai(unicode_set):
+        "Unicode set for Thai Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0E01, 0x0E3A),
+            (0x0E3F, 0x0E5B)
+        ]
+
+    class Arabic(unicode_set):
+        "Unicode set for Arabic Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0600, 0x061B),
+            (0x061E, 0x06FF),
+            (0x0700, 0x077F),
+        ]
+
+    class Hebrew(unicode_set):
+        "Unicode set for Hebrew Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0591, 0x05C7),
+            (0x05D0, 0x05EA),
+            (0x05EF, 0x05F4),
+            (0xFB1D, 0xFB36),
+            (0xFB38, 0xFB3C),
+            (0xFB3E,),
+            (0xFB40, 0xFB41),
+            (0xFB43, 0xFB44),
+            (0xFB46, 0xFB4F),
+        ]
+
+    class Devanagari(unicode_set):
+        "Unicode set for Devanagari Unicode Character Range"
+        _ranges: UnicodeRangeList = [
+            (0x0900, 0x097F),
+            (0xA8E0, 0xA8FF)
+        ]
+
+    # fmt: on
+
+
+pyparsing_unicode.Japanese._ranges = (
+    pyparsing_unicode.Japanese.Kanji._ranges
+    + pyparsing_unicode.Japanese.Hiragana._ranges
+    + pyparsing_unicode.Japanese.Katakana._ranges
+)
+
+pyparsing_unicode.BMP = pyparsing_unicode.BasicMultilingualPlane
+
+# add language identifiers using language Unicode
+pyparsing_unicode.العربية = pyparsing_unicode.Arabic
+pyparsing_unicode.中文 = pyparsing_unicode.Chinese
+pyparsing_unicode.кириллица = pyparsing_unicode.Cyrillic
+pyparsing_unicode.Ελληνικά = pyparsing_unicode.Greek
+pyparsing_unicode.עִברִית = pyparsing_unicode.Hebrew
+pyparsing_unicode.日本語 = pyparsing_unicode.Japanese
+pyparsing_unicode.Japanese.漢字 = pyparsing_unicode.Japanese.Kanji
+pyparsing_unicode.Japanese.カタカナ = pyparsing_unicode.Japanese.Katakana
+pyparsing_unicode.Japanese.ひらがな = pyparsing_unicode.Japanese.Hiragana
+pyparsing_unicode.한국어 = pyparsing_unicode.Korean
+pyparsing_unicode.ไทย = pyparsing_unicode.Thai
+pyparsing_unicode.देवनागरी = pyparsing_unicode.Devanagari
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/util.py b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/util.py
new file mode 100644
index 0000000..34ce092
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/pyparsing/util.py
@@ -0,0 +1,235 @@
+# util.py
+import warnings
+import types
+import collections
+import itertools
+from functools import lru_cache
+from typing import List, Union, Iterable
+
+_bslash = chr(92)
+
+
+class __config_flags:
+    """Internal class for defining compatibility and debugging flags"""
+
+    _all_names: List[str] = []
+    _fixed_names: List[str] = []
+    _type_desc = "configuration"
+
+    @classmethod
+    def _set(cls, dname, value):
+        if dname in cls._fixed_names:
+            warnings.warn(
+                "{}.{} {} is {} and cannot be overridden".format(
+                    cls.__name__,
+                    dname,
+                    cls._type_desc,
+                    str(getattr(cls, dname)).upper(),
+                )
+            )
+            return
+        if dname in cls._all_names:
+            setattr(cls, dname, value)
+        else:
+            raise ValueError("no such {} {!r}".format(cls._type_desc, dname))
+
+    enable = classmethod(lambda cls, name: cls._set(name, True))
+    disable = classmethod(lambda cls, name: cls._set(name, False))
+
+
+@lru_cache(maxsize=128)
+def col(loc: int, strg: str) -> int:
+    """
+    Returns current column within a string, counting newlines as line separators.
+    The first column is number 1.
+
+    Note: the default parsing behavior is to expand tabs in the input string
+    before starting the parsing process.  See
+    :class:`ParserElement.parseString` for more
+    information on parsing strings containing ``<TAB>`` s, and suggested
+    methods to maintain a consistent view of the parsed string, the parse
+    location, and line and column positions within the parsed string.
+    """
+    s = strg
+    return 1 if 0 < loc < len(s) and s[loc - 1] == "\n" else loc - s.rfind("\n", 0, loc)
+
+
+@lru_cache(maxsize=128)
+def lineno(loc: int, strg: str) -> int:
+    """Returns current line number within a string, counting newlines as line separators.
+    The first line is number 1.
+
+    Note - the default parsing behavior is to expand tabs in the input string
+    before starting the parsing process.  See :class:`ParserElement.parseString`
+    for more information on parsing strings containing ``<TAB>`` s, and
+    suggested methods to maintain a consistent view of the parsed string, the
+    parse location, and line and column positions within the parsed string.
+    """
+    return strg.count("\n", 0, loc) + 1
+
+
+@lru_cache(maxsize=128)
+def line(loc: int, strg: str) -> str:
+    """
+    Returns the line of text containing loc within a string, counting newlines as line separators.
+    """
+    last_cr = strg.rfind("\n", 0, loc)
+    next_cr = strg.find("\n", loc)
+    return strg[last_cr + 1 : next_cr] if next_cr >= 0 else strg[last_cr + 1 :]
+
+
+class _UnboundedCache:
+    def __init__(self):
+        cache = {}
+        cache_get = cache.get
+        self.not_in_cache = not_in_cache = object()
+
+        def get(_, key):
+            return cache_get(key, not_in_cache)
+
+        def set_(_, key, value):
+            cache[key] = value
+
+        def clear(_):
+            cache.clear()
+
+        self.size = None
+        self.get = types.MethodType(get, self)
+        self.set = types.MethodType(set_, self)
+        self.clear = types.MethodType(clear, self)
+
+
+class _FifoCache:
+    def __init__(self, size):
+        self.not_in_cache = not_in_cache = object()
+        cache = collections.OrderedDict()
+        cache_get = cache.get
+
+        def get(_, key):
+            return cache_get(key, not_in_cache)
+
+        def set_(_, key, value):
+            cache[key] = value
+            while len(cache) > size:
+                cache.popitem(last=False)
+
+        def clear(_):
+            cache.clear()
+
+        self.size = size
+        self.get = types.MethodType(get, self)
+        self.set = types.MethodType(set_, self)
+        self.clear = types.MethodType(clear, self)
+
+
+class LRUMemo:
+    """
+    A memoizing mapping that retains `capacity` deleted items
+
+    The memo tracks retained items by their access order; once `capacity` items
+    are retained, the least recently used item is discarded.
+    """
+
+    def __init__(self, capacity):
+        self._capacity = capacity
+        self._active = {}
+        self._memory = collections.OrderedDict()
+
+    def __getitem__(self, key):
+        try:
+            return self._active[key]
+        except KeyError:
+            self._memory.move_to_end(key)
+            return self._memory[key]
+
+    def __setitem__(self, key, value):
+        self._memory.pop(key, None)
+        self._active[key] = value
+
+    def __delitem__(self, key):
+        try:
+            value = self._active.pop(key)
+        except KeyError:
+            pass
+        else:
+            while len(self._memory) >= self._capacity:
+                self._memory.popitem(last=False)
+            self._memory[key] = value
+
+    def clear(self):
+        self._active.clear()
+        self._memory.clear()
+
+
+class UnboundedMemo(dict):
+    """
+    A memoizing mapping that retains all deleted items
+    """
+
+    def __delitem__(self, key):
+        pass
+
+
+def _escape_regex_range_chars(s: str) -> str:
+    # escape these chars: ^-[]
+    for c in r"\^-[]":
+        s = s.replace(c, _bslash + c)
+    s = s.replace("\n", r"\n")
+    s = s.replace("\t", r"\t")
+    return str(s)
+
+
+def _collapse_string_to_ranges(
+    s: Union[str, Iterable[str]], re_escape: bool = True
+) -> str:
+    def is_consecutive(c):
+        c_int = ord(c)
+        is_consecutive.prev, prev = c_int, is_consecutive.prev
+        if c_int - prev > 1:
+            is_consecutive.value = next(is_consecutive.counter)
+        return is_consecutive.value
+
+    is_consecutive.prev = 0
+    is_consecutive.counter = itertools.count()
+    is_consecutive.value = -1
+
+    def escape_re_range_char(c):
+        return "\\" + c if c in r"\^-][" else c
+
+    def no_escape_re_range_char(c):
+        return c
+
+    if not re_escape:
+        escape_re_range_char = no_escape_re_range_char
+
+    ret = []
+    s = "".join(sorted(set(s)))
+    if len(s) > 3:
+        for _, chars in itertools.groupby(s, key=is_consecutive):
+            first = last = next(chars)
+            last = collections.deque(
+                itertools.chain(iter([last]), chars), maxlen=1
+            ).pop()
+            if first == last:
+                ret.append(escape_re_range_char(first))
+            else:
+                sep = "" if ord(last) == ord(first) + 1 else "-"
+                ret.append(
+                    "{}{}{}".format(
+                        escape_re_range_char(first), sep, escape_re_range_char(last)
+                    )
+                )
+    else:
+        ret = [escape_re_range_char(c) for c in s]
+
+    return "".join(ret)
+
+
+def _flatten(ll: list) -> list:
+    ret = []
+    for i in ll:
+        if isinstance(i, list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/__init__.py
new file mode 100644
index 0000000..9e97059
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/__init__.py
@@ -0,0 +1,182 @@
+#   __
+#  /__)  _  _     _   _ _/   _
+# / (   (- (/ (/ (- _)  /  _)
+#          /
+
+"""
+Requests HTTP Library
+~~~~~~~~~~~~~~~~~~~~~
+
+Requests is an HTTP library, written in Python, for human beings.
+Basic GET usage:
+
+   >>> import requests
+   >>> r = requests.get('https://www.python.org')
+   >>> r.status_code
+   200
+   >>> b'Python is a programming language' in r.content
+   True
+
+... or POST:
+
+   >>> payload = dict(key1='value1', key2='value2')
+   >>> r = requests.post('https://httpbin.org/post', data=payload)
+   >>> print(r.text)
+   {
+     ...
+     "form": {
+       "key1": "value1",
+       "key2": "value2"
+     },
+     ...
+   }
+
+The other HTTP methods are supported - see `requests.api`. Full documentation
+is at <https://requests.readthedocs.io>.
+
+:copyright: (c) 2017 by Kenneth Reitz.
+:license: Apache 2.0, see LICENSE for more details.
+"""
+
+import warnings
+
+from pip._vendor import urllib3
+
+from .exceptions import RequestsDependencyWarning
+
+charset_normalizer_version = None
+
+try:
+    from pip._vendor.chardet import __version__ as chardet_version
+except ImportError:
+    chardet_version = None
+
+
+def check_compatibility(urllib3_version, chardet_version, charset_normalizer_version):
+    urllib3_version = urllib3_version.split(".")
+    assert urllib3_version != ["dev"]  # Verify urllib3 isn't installed from git.
+
+    # Sometimes, urllib3 only reports its version as 16.1.
+    if len(urllib3_version) == 2:
+        urllib3_version.append("0")
+
+    # Check urllib3 for compatibility.
+    major, minor, patch = urllib3_version  # noqa: F811
+    major, minor, patch = int(major), int(minor), int(patch)
+    # urllib3 >= 1.21.1, <= 1.26
+    assert major == 1
+    assert minor >= 21
+    assert minor <= 26
+
+    # Check charset_normalizer for compatibility.
+    if chardet_version:
+        major, minor, patch = chardet_version.split(".")[:3]
+        major, minor, patch = int(major), int(minor), int(patch)
+        # chardet_version >= 3.0.2, < 6.0.0
+        assert (3, 0, 2) <= (major, minor, patch) < (6, 0, 0)
+    elif charset_normalizer_version:
+        major, minor, patch = charset_normalizer_version.split(".")[:3]
+        major, minor, patch = int(major), int(minor), int(patch)
+        # charset_normalizer >= 2.0.0 < 3.0.0
+        assert (2, 0, 0) <= (major, minor, patch) < (3, 0, 0)
+    else:
+        raise Exception("You need either charset_normalizer or chardet installed")
+
+
+def _check_cryptography(cryptography_version):
+    # cryptography < 1.3.4
+    try:
+        cryptography_version = list(map(int, cryptography_version.split(".")))
+    except ValueError:
+        return
+
+    if cryptography_version < [1, 3, 4]:
+        warning = "Old version of cryptography ({}) may cause slowdown.".format(
+            cryptography_version
+        )
+        warnings.warn(warning, RequestsDependencyWarning)
+
+
+# Check imported dependencies for compatibility.
+try:
+    check_compatibility(
+        urllib3.__version__, chardet_version, charset_normalizer_version
+    )
+except (AssertionError, ValueError):
+    warnings.warn(
+        "urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn't match a supported "
+        "version!".format(
+            urllib3.__version__, chardet_version, charset_normalizer_version
+        ),
+        RequestsDependencyWarning,
+    )
+
+# Attempt to enable urllib3's fallback for SNI support
+# if the standard library doesn't support SNI or the
+# 'ssl' library isn't available.
+try:
+    # Note: This logic prevents upgrading cryptography on Windows, if imported
+    #       as part of pip.
+    from pip._internal.utils.compat import WINDOWS
+    if not WINDOWS:
+        raise ImportError("pip internals: don't import cryptography on Windows")
+    try:
+        import ssl
+    except ImportError:
+        ssl = None
+
+    if not getattr(ssl, "HAS_SNI", False):
+        from pip._vendor.urllib3.contrib import pyopenssl
+
+        pyopenssl.inject_into_urllib3()
+
+        # Check cryptography version
+        from cryptography import __version__ as cryptography_version
+
+        _check_cryptography(cryptography_version)
+except ImportError:
+    pass
+
+# urllib3's DependencyWarnings should be silenced.
+from pip._vendor.urllib3.exceptions import DependencyWarning
+
+warnings.simplefilter("ignore", DependencyWarning)
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+from logging import NullHandler
+
+from . import packages, utils
+from .__version__ import (
+    __author__,
+    __author_email__,
+    __build__,
+    __cake__,
+    __copyright__,
+    __description__,
+    __license__,
+    __title__,
+    __url__,
+    __version__,
+)
+from .api import delete, get, head, options, patch, post, put, request
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    FileModeWarning,
+    HTTPError,
+    JSONDecodeError,
+    ReadTimeout,
+    RequestException,
+    Timeout,
+    TooManyRedirects,
+    URLRequired,
+)
+from .models import PreparedRequest, Request, Response
+from .sessions import Session, session
+from .status_codes import codes
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+# FileModeWarnings go off per the default.
+warnings.simplefilter("default", FileModeWarning, append=True)
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/__version__.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/__version__.py
new file mode 100644
index 0000000..e725ada
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/__version__.py
@@ -0,0 +1,14 @@
+# .-. .-. .-. . . .-. .-. .-. .-.
+# |(  |-  |.| | | |-  `-.  |  `-.
+# ' ' `-' `-`.`-' `-' `-'  '  `-'
+
+__title__ = "requests"
+__description__ = "Python HTTP for Humans."
+__url__ = "https://requests.readthedocs.io"
+__version__ = "2.28.1"
+__build__ = 0x022801
+__author__ = "Kenneth Reitz"
+__author_email__ = "me@kennethreitz.org"
+__license__ = "Apache 2.0"
+__copyright__ = "Copyright 2022 Kenneth Reitz"
+__cake__ = "\u2728 \U0001f370 \u2728"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/_internal_utils.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/_internal_utils.py
new file mode 100644
index 0000000..7dc9bc5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/_internal_utils.py
@@ -0,0 +1,48 @@
+"""
+requests._internal_utils
+~~~~~~~~~~~~~~
+
+Provides utility functions that are consumed internally by Requests
+which depend on extremely few external helpers (such as compat)
+"""
+import re
+
+from .compat import builtin_str
+
+_VALID_HEADER_NAME_RE_BYTE = re.compile(rb"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_NAME_RE_STR = re.compile(r"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_VALUE_RE_BYTE = re.compile(rb"^\S[^\r\n]*$|^$")
+_VALID_HEADER_VALUE_RE_STR = re.compile(r"^\S[^\r\n]*$|^$")
+
+HEADER_VALIDATORS = {
+    bytes: (_VALID_HEADER_NAME_RE_BYTE, _VALID_HEADER_VALUE_RE_BYTE),
+    str: (_VALID_HEADER_NAME_RE_STR, _VALID_HEADER_VALUE_RE_STR),
+}
+
+
+def to_native_string(string, encoding="ascii"):
+    """Given a string object, regardless of type, returns a representation of
+    that string in the native string type, encoding and decoding where
+    necessary. This assumes ASCII unless told otherwise.
+    """
+    if isinstance(string, builtin_str):
+        out = string
+    else:
+        out = string.decode(encoding)
+
+    return out
+
+
+def unicode_is_ascii(u_string):
+    """Determine if unicode string only contains ASCII characters.
+
+    :param str u_string: unicode string to check. Must be unicode
+        and not Python 2 `str`.
+    :rtype: bool
+    """
+    assert isinstance(u_string, str)
+    try:
+        u_string.encode("ascii")
+        return True
+    except UnicodeEncodeError:
+        return False
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/adapters.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/adapters.py
new file mode 100644
index 0000000..f68f7d4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/adapters.py
@@ -0,0 +1,584 @@
+"""
+requests.adapters
+~~~~~~~~~~~~~~~~~
+
+This module contains the transport adapters that Requests uses to define
+and maintain connections.
+"""
+
+import os.path
+import socket  # noqa: F401
+
+from pip._vendor.urllib3.exceptions import ClosedPoolError, ConnectTimeoutError
+from pip._vendor.urllib3.exceptions import HTTPError as _HTTPError
+from pip._vendor.urllib3.exceptions import InvalidHeader as _InvalidHeader
+from pip._vendor.urllib3.exceptions import (
+    LocationValueError,
+    MaxRetryError,
+    NewConnectionError,
+    ProtocolError,
+)
+from pip._vendor.urllib3.exceptions import ProxyError as _ProxyError
+from pip._vendor.urllib3.exceptions import ReadTimeoutError, ResponseError
+from pip._vendor.urllib3.exceptions import SSLError as _SSLError
+from pip._vendor.urllib3.poolmanager import PoolManager, proxy_from_url
+from pip._vendor.urllib3.response import HTTPResponse
+from pip._vendor.urllib3.util import Timeout as TimeoutSauce
+from pip._vendor.urllib3.util import parse_url
+from pip._vendor.urllib3.util.retry import Retry
+
+from .auth import _basic_auth_str
+from .compat import basestring, urlparse
+from .cookies import extract_cookies_to_jar
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    InvalidHeader,
+    InvalidProxyURL,
+    InvalidSchema,
+    InvalidURL,
+    ProxyError,
+    ReadTimeout,
+    RetryError,
+    SSLError,
+)
+from .models import Response
+from .structures import CaseInsensitiveDict
+from .utils import (
+    DEFAULT_CA_BUNDLE_PATH,
+    extract_zipped_paths,
+    get_auth_from_url,
+    get_encoding_from_headers,
+    prepend_scheme_if_needed,
+    select_proxy,
+    urldefragauth,
+)
+
+try:
+    from pip._vendor.urllib3.contrib.socks import SOCKSProxyManager
+except ImportError:
+
+    def SOCKSProxyManager(*args, **kwargs):
+        raise InvalidSchema("Missing dependencies for SOCKS support.")
+
+
+DEFAULT_POOLBLOCK = False
+DEFAULT_POOLSIZE = 10
+DEFAULT_RETRIES = 0
+DEFAULT_POOL_TIMEOUT = None
+
+
+class BaseAdapter:
+    """The Base Transport Adapter"""
+
+    def __init__(self):
+        super().__init__()
+
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        """
+        raise NotImplementedError
+
+    def close(self):
+        """Cleans up adapter specific items."""
+        raise NotImplementedError
+
+
+class HTTPAdapter(BaseAdapter):
+    """The built-in HTTP Adapter for urllib3.
+
+    Provides a general-case interface for Requests sessions to contact HTTP and
+    HTTPS urls by implementing the Transport Adapter interface. This class will
+    usually be created by the :class:`Session <Session>` class under the
+    covers.
+
+    :param pool_connections: The number of urllib3 connection pools to cache.
+    :param pool_maxsize: The maximum number of connections to save in the pool.
+    :param max_retries: The maximum number of retries each connection
+        should attempt. Note, this applies only to failed DNS lookups, socket
+        connections and connection timeouts, never to requests where data has
+        made it to the server. By default, Requests does not retry failed
+        connections. If you need granular control over the conditions under
+        which we retry a request, import urllib3's ``Retry`` class and pass
+        that instead.
+    :param pool_block: Whether the connection pool should block for connections.
+
+    Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> a = requests.adapters.HTTPAdapter(max_retries=3)
+      >>> s.mount('http://', a)
+    """
+
+    __attrs__ = [
+        "max_retries",
+        "config",
+        "_pool_connections",
+        "_pool_maxsize",
+        "_pool_block",
+    ]
+
+    def __init__(
+        self,
+        pool_connections=DEFAULT_POOLSIZE,
+        pool_maxsize=DEFAULT_POOLSIZE,
+        max_retries=DEFAULT_RETRIES,
+        pool_block=DEFAULT_POOLBLOCK,
+    ):
+        if max_retries == DEFAULT_RETRIES:
+            self.max_retries = Retry(0, read=False)
+        else:
+            self.max_retries = Retry.from_int(max_retries)
+        self.config = {}
+        self.proxy_manager = {}
+
+        super().__init__()
+
+        self._pool_connections = pool_connections
+        self._pool_maxsize = pool_maxsize
+        self._pool_block = pool_block
+
+        self.init_poolmanager(pool_connections, pool_maxsize, block=pool_block)
+
+    def __getstate__(self):
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        # Can't handle by adding 'proxy_manager' to self.__attrs__ because
+        # self.poolmanager uses a lambda function, which isn't pickleable.
+        self.proxy_manager = {}
+        self.config = {}
+
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+        self.init_poolmanager(
+            self._pool_connections, self._pool_maxsize, block=self._pool_block
+        )
+
+    def init_poolmanager(
+        self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs
+    ):
+        """Initializes a urllib3 PoolManager.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param connections: The number of urllib3 connection pools to cache.
+        :param maxsize: The maximum number of connections to save in the pool.
+        :param block: Block when no free connections are available.
+        :param pool_kwargs: Extra keyword arguments used to initialize the Pool Manager.
+        """
+        # save these values for pickling
+        self._pool_connections = connections
+        self._pool_maxsize = maxsize
+        self._pool_block = block
+
+        self.poolmanager = PoolManager(
+            num_pools=connections,
+            maxsize=maxsize,
+            block=block,
+            strict=True,
+            **pool_kwargs,
+        )
+
+    def proxy_manager_for(self, proxy, **proxy_kwargs):
+        """Return urllib3 ProxyManager for the given proxy.
+
+        This method should not be called from user code, and is only
+        exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The proxy to return a urllib3 ProxyManager for.
+        :param proxy_kwargs: Extra keyword arguments used to configure the Proxy Manager.
+        :returns: ProxyManager
+        :rtype: urllib3.ProxyManager
+        """
+        if proxy in self.proxy_manager:
+            manager = self.proxy_manager[proxy]
+        elif proxy.lower().startswith("socks"):
+            username, password = get_auth_from_url(proxy)
+            manager = self.proxy_manager[proxy] = SOCKSProxyManager(
+                proxy,
+                username=username,
+                password=password,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs,
+            )
+        else:
+            proxy_headers = self.proxy_headers(proxy)
+            manager = self.proxy_manager[proxy] = proxy_from_url(
+                proxy,
+                proxy_headers=proxy_headers,
+                num_pools=self._pool_connections,
+                maxsize=self._pool_maxsize,
+                block=self._pool_block,
+                **proxy_kwargs,
+            )
+
+        return manager
+
+    def cert_verify(self, conn, url, verify, cert):
+        """Verify a SSL certificate. This method should not be called from user
+        code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param conn: The urllib3 connection object associated with the cert.
+        :param url: The requested URL.
+        :param verify: Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use
+        :param cert: The SSL certificate to verify.
+        """
+        if url.lower().startswith("https") and verify:
+
+            cert_loc = None
+
+            # Allow self-specified cert location.
+            if verify is not True:
+                cert_loc = verify
+
+            if not cert_loc:
+                cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
+
+            if not cert_loc or not os.path.exists(cert_loc):
+                raise OSError(
+                    f"Could not find a suitable TLS CA certificate bundle, "
+                    f"invalid path: {cert_loc}"
+                )
+
+            conn.cert_reqs = "CERT_REQUIRED"
+
+            if not os.path.isdir(cert_loc):
+                conn.ca_certs = cert_loc
+            else:
+                conn.ca_cert_dir = cert_loc
+        else:
+            conn.cert_reqs = "CERT_NONE"
+            conn.ca_certs = None
+            conn.ca_cert_dir = None
+
+        if cert:
+            if not isinstance(cert, basestring):
+                conn.cert_file = cert[0]
+                conn.key_file = cert[1]
+            else:
+                conn.cert_file = cert
+                conn.key_file = None
+            if conn.cert_file and not os.path.exists(conn.cert_file):
+                raise OSError(
+                    f"Could not find the TLS certificate file, "
+                    f"invalid path: {conn.cert_file}"
+                )
+            if conn.key_file and not os.path.exists(conn.key_file):
+                raise OSError(
+                    f"Could not find the TLS key file, invalid path: {conn.key_file}"
+                )
+
+    def build_response(self, req, resp):
+        """Builds a :class:`Response <requests.Response>` object from a urllib3
+        response. This should not be called from user code, and is only exposed
+        for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`
+
+        :param req: The :class:`PreparedRequest <PreparedRequest>` used to generate the response.
+        :param resp: The urllib3 response object.
+        :rtype: requests.Response
+        """
+        response = Response()
+
+        # Fallback to None if there's no status_code, for whatever reason.
+        response.status_code = getattr(resp, "status", None)
+
+        # Make headers case-insensitive.
+        response.headers = CaseInsensitiveDict(getattr(resp, "headers", {}))
+
+        # Set encoding.
+        response.encoding = get_encoding_from_headers(response.headers)
+        response.raw = resp
+        response.reason = response.raw.reason
+
+        if isinstance(req.url, bytes):
+            response.url = req.url.decode("utf-8")
+        else:
+            response.url = req.url
+
+        # Add new cookies from the server.
+        extract_cookies_to_jar(response.cookies, req, resp)
+
+        # Give the Response some context.
+        response.request = req
+        response.connection = self
+
+        return response
+
+    def get_connection(self, url, proxies=None):
+        """Returns a urllib3 connection for the given URL. This should not be
+        called from user code, and is only exposed for use when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param url: The URL to connect to.
+        :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
+        :rtype: urllib3.ConnectionPool
+        """
+        proxy = select_proxy(url, proxies)
+
+        if proxy:
+            proxy = prepend_scheme_if_needed(proxy, "http")
+            proxy_url = parse_url(proxy)
+            if not proxy_url.host:
+                raise InvalidProxyURL(
+                    "Please check proxy URL. It is malformed "
+                    "and could be missing the host."
+                )
+            proxy_manager = self.proxy_manager_for(proxy)
+            conn = proxy_manager.connection_from_url(url)
+        else:
+            # Only scheme should be lower case
+            parsed = urlparse(url)
+            url = parsed.geturl()
+            conn = self.poolmanager.connection_from_url(url)
+
+        return conn
+
+    def close(self):
+        """Disposes of any internal state.
+
+        Currently, this closes the PoolManager and any active ProxyManager,
+        which closes any pooled connections.
+        """
+        self.poolmanager.clear()
+        for proxy in self.proxy_manager.values():
+            proxy.clear()
+
+    def request_url(self, request, proxies):
+        """Obtain the url to use when making the final request.
+
+        If the message is being sent through a HTTP proxy, the full URL has to
+        be used. Otherwise, we should only use the path portion of the URL.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs.
+        :rtype: str
+        """
+        proxy = select_proxy(request.url, proxies)
+        scheme = urlparse(request.url).scheme
+
+        is_proxied_http_request = proxy and scheme != "https"
+        using_socks_proxy = False
+        if proxy:
+            proxy_scheme = urlparse(proxy).scheme.lower()
+            using_socks_proxy = proxy_scheme.startswith("socks")
+
+        url = request.path_url
+        if is_proxied_http_request and not using_socks_proxy:
+            url = urldefragauth(request.url)
+
+        return url
+
+    def add_headers(self, request, **kwargs):
+        """Add any headers needed by the connection. As of v2.0 this does
+        nothing by default, but is left for overriding by users that subclass
+        the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` to add headers to.
+        :param kwargs: The keyword arguments from the call to send().
+        """
+        pass
+
+    def proxy_headers(self, proxy):
+        """Returns a dictionary of the headers to add to any request sent
+        through a proxy. This works with urllib3 magic to ensure that they are
+        correctly sent to the proxy, rather than in a tunnelled request if
+        CONNECT is being used.
+
+        This should not be called from user code, and is only exposed for use
+        when subclassing the
+        :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param proxy: The url of the proxy being used for this request.
+        :rtype: dict
+        """
+        headers = {}
+        username, password = get_auth_from_url(proxy)
+
+        if username:
+            headers["Proxy-Authorization"] = _basic_auth_str(username, password)
+
+        return headers
+
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
+        """Sends PreparedRequest object. Returns Response object.
+
+        :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
+        :param stream: (optional) Whether to stream the request content.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple or urllib3 Timeout object
+        :param verify: (optional) Either a boolean, in which case it controls whether
+            we verify the server's TLS certificate, or a string, in which case it
+            must be a path to a CA bundle to use
+        :param cert: (optional) Any user-provided SSL certificate to be trusted.
+        :param proxies: (optional) The proxies dictionary to apply to the request.
+        :rtype: requests.Response
+        """
+
+        try:
+            conn = self.get_connection(request.url, proxies)
+        except LocationValueError as e:
+            raise InvalidURL(e, request=request)
+
+        self.cert_verify(conn, request.url, verify, cert)
+        url = self.request_url(request, proxies)
+        self.add_headers(
+            request,
+            stream=stream,
+            timeout=timeout,
+            verify=verify,
+            cert=cert,
+            proxies=proxies,
+        )
+
+        chunked = not (request.body is None or "Content-Length" in request.headers)
+
+        if isinstance(timeout, tuple):
+            try:
+                connect, read = timeout
+                timeout = TimeoutSauce(connect=connect, read=read)
+            except ValueError:
+                raise ValueError(
+                    f"Invalid timeout {timeout}. Pass a (connect, read) timeout tuple, "
+                    f"or a single float to set both timeouts to the same value."
+                )
+        elif isinstance(timeout, TimeoutSauce):
+            pass
+        else:
+            timeout = TimeoutSauce(connect=timeout, read=timeout)
+
+        try:
+            if not chunked:
+                resp = conn.urlopen(
+                    method=request.method,
+                    url=url,
+                    body=request.body,
+                    headers=request.headers,
+                    redirect=False,
+                    assert_same_host=False,
+                    preload_content=False,
+                    decode_content=False,
+                    retries=self.max_retries,
+                    timeout=timeout,
+                )
+
+            # Send the request.
+            else:
+                if hasattr(conn, "proxy_pool"):
+                    conn = conn.proxy_pool
+
+                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
+
+                try:
+                    skip_host = "Host" in request.headers
+                    low_conn.putrequest(
+                        request.method,
+                        url,
+                        skip_accept_encoding=True,
+                        skip_host=skip_host,
+                    )
+
+                    for header, value in request.headers.items():
+                        low_conn.putheader(header, value)
+
+                    low_conn.endheaders()
+
+                    for i in request.body:
+                        low_conn.send(hex(len(i))[2:].encode("utf-8"))
+                        low_conn.send(b"\r\n")
+                        low_conn.send(i)
+                        low_conn.send(b"\r\n")
+                    low_conn.send(b"0\r\n\r\n")
+
+                    # Receive the response from the server
+                    r = low_conn.getresponse()
+
+                    resp = HTTPResponse.from_httplib(
+                        r,
+                        pool=conn,
+                        connection=low_conn,
+                        preload_content=False,
+                        decode_content=False,
+                    )
+                except Exception:
+                    # If we hit any problems here, clean up the connection.
+                    # Then, raise so that we can handle the actual exception.
+                    low_conn.close()
+                    raise
+
+        except (ProtocolError, OSError) as err:
+            raise ConnectionError(err, request=request)
+
+        except MaxRetryError as e:
+            if isinstance(e.reason, ConnectTimeoutError):
+                # TODO: Remove this in 3.0.0: see #2811
+                if not isinstance(e.reason, NewConnectionError):
+                    raise ConnectTimeout(e, request=request)
+
+            if isinstance(e.reason, ResponseError):
+                raise RetryError(e, request=request)
+
+            if isinstance(e.reason, _ProxyError):
+                raise ProxyError(e, request=request)
+
+            if isinstance(e.reason, _SSLError):
+                # This branch is for urllib3 v1.22 and later.
+                raise SSLError(e, request=request)
+
+            raise ConnectionError(e, request=request)
+
+        except ClosedPoolError as e:
+            raise ConnectionError(e, request=request)
+
+        except _ProxyError as e:
+            raise ProxyError(e)
+
+        except (_SSLError, _HTTPError) as e:
+            if isinstance(e, _SSLError):
+                # This branch is for urllib3 versions earlier than v1.22
+                raise SSLError(e, request=request)
+            elif isinstance(e, ReadTimeoutError):
+                raise ReadTimeout(e, request=request)
+            elif isinstance(e, _InvalidHeader):
+                raise InvalidHeader(e, request=request)
+            else:
+                raise
+
+        return self.build_response(request, resp)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/api.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/api.py
new file mode 100644
index 0000000..2f71aae
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/api.py
@@ -0,0 +1,157 @@
+"""
+requests.api
+~~~~~~~~~~~~
+
+This module implements the Requests API.
+
+:copyright: (c) 2012 by Kenneth Reitz.
+:license: Apache2, see LICENSE for more details.
+"""
+
+from . import sessions
+
+
+def request(method, url, **kwargs):
+    """Constructs and sends a :class:`Request <Request>`.
+
+    :param method: method for the new :class:`Request` object: ``GET``, ``OPTIONS``, ``HEAD``, ``POST``, ``PUT``, ``PATCH``, or ``DELETE``.
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
+    :param headers: (optional) Dictionary of HTTP Headers to send with the :class:`Request`.
+    :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
+    :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
+        ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
+        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
+        defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
+        to add for the file.
+    :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
+    :param timeout: (optional) How many seconds to wait for the server to send data
+        before giving up, as a float, or a :ref:`(connect timeout, read
+        timeout) <timeouts>` tuple.
+    :type timeout: float or tuple
+    :param allow_redirects: (optional) Boolean. Enable/disable GET/OPTIONS/POST/PUT/PATCH/DELETE/HEAD redirection. Defaults to ``True``.
+    :type allow_redirects: bool
+    :param proxies: (optional) Dictionary mapping protocol to the URL of the proxy.
+    :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``.
+    :param stream: (optional) if ``False``, the response content will be immediately downloaded.
+    :param cert: (optional) if String, path to ssl client cert file (.pem). If Tuple, ('cert', 'key') pair.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.request('GET', 'https://httpbin.org/get')
+      >>> req
+      <Response [200]>
+    """
+
+    # By using the 'with' statement we are sure the session is closed, thus we
+    # avoid leaving sockets open which can trigger a ResourceWarning in some
+    # cases, and look like a memory leak in others.
+    with sessions.Session() as session:
+        return session.request(method=method, url=url, **kwargs)
+
+
+def get(url, params=None, **kwargs):
+    r"""Sends a GET request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param params: (optional) Dictionary, list of tuples or bytes to send
+        in the query string for the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("get", url, params=params, **kwargs)
+
+
+def options(url, **kwargs):
+    r"""Sends an OPTIONS request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("options", url, **kwargs)
+
+
+def head(url, **kwargs):
+    r"""Sends a HEAD request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes. If
+        `allow_redirects` is not provided, it will be set to `False` (as
+        opposed to the default :meth:`request` behavior).
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    kwargs.setdefault("allow_redirects", False)
+    return request("head", url, **kwargs)
+
+
+def post(url, data=None, json=None, **kwargs):
+    r"""Sends a POST request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("post", url, data=data, json=json, **kwargs)
+
+
+def put(url, data=None, **kwargs):
+    r"""Sends a PUT request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("put", url, data=data, **kwargs)
+
+
+def patch(url, data=None, **kwargs):
+    r"""Sends a PATCH request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+        object to send in the body of the :class:`Request`.
+    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("patch", url, data=data, **kwargs)
+
+
+def delete(url, **kwargs):
+    r"""Sends a DELETE request.
+
+    :param url: URL for the new :class:`Request` object.
+    :param \*\*kwargs: Optional arguments that ``request`` takes.
+    :return: :class:`Response <Response>` object
+    :rtype: requests.Response
+    """
+
+    return request("delete", url, **kwargs)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/auth.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/auth.py
new file mode 100644
index 0000000..9733686
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/auth.py
@@ -0,0 +1,315 @@
+"""
+requests.auth
+~~~~~~~~~~~~~
+
+This module contains the authentication handlers for Requests.
+"""
+
+import hashlib
+import os
+import re
+import threading
+import time
+import warnings
+from base64 import b64encode
+
+from ._internal_utils import to_native_string
+from .compat import basestring, str, urlparse
+from .cookies import extract_cookies_to_jar
+from .utils import parse_dict_header
+
+CONTENT_TYPE_FORM_URLENCODED = "application/x-www-form-urlencoded"
+CONTENT_TYPE_MULTI_PART = "multipart/form-data"
+
+
+def _basic_auth_str(username, password):
+    """Returns a Basic Auth string."""
+
+    # "I want us to put a big-ol' comment on top of it that
+    # says that this behaviour is dumb but we need to preserve
+    # it because people are relying on it."
+    #    - Lukasa
+    #
+    # These are here solely to maintain backwards compatibility
+    # for things like ints. This will be removed in 3.0.0.
+    if not isinstance(username, basestring):
+        warnings.warn(
+            "Non-string usernames will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(username),
+            category=DeprecationWarning,
+        )
+        username = str(username)
+
+    if not isinstance(password, basestring):
+        warnings.warn(
+            "Non-string passwords will no longer be supported in Requests "
+            "3.0.0. Please convert the object you've passed in ({!r}) to "
+            "a string or bytes object in the near future to avoid "
+            "problems.".format(type(password)),
+            category=DeprecationWarning,
+        )
+        password = str(password)
+    # -- End Removal --
+
+    if isinstance(username, str):
+        username = username.encode("latin1")
+
+    if isinstance(password, str):
+        password = password.encode("latin1")
+
+    authstr = "Basic " + to_native_string(
+        b64encode(b":".join((username, password))).strip()
+    )
+
+    return authstr
+
+
+class AuthBase:
+    """Base class that all auth implementations derive from"""
+
+    def __call__(self, r):
+        raise NotImplementedError("Auth hooks must be callable.")
+
+
+class HTTPBasicAuth(AuthBase):
+    """Attaches HTTP Basic Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __eq__(self, other):
+        return all(
+            [
+                self.username == getattr(other, "username", None),
+                self.password == getattr(other, "password", None),
+            ]
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __call__(self, r):
+        r.headers["Authorization"] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPProxyAuth(HTTPBasicAuth):
+    """Attaches HTTP Proxy Authentication to a given Request object."""
+
+    def __call__(self, r):
+        r.headers["Proxy-Authorization"] = _basic_auth_str(self.username, self.password)
+        return r
+
+
+class HTTPDigestAuth(AuthBase):
+    """Attaches HTTP Digest Authentication to the given Request object."""
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+        # Keep state in per-thread local storage
+        self._thread_local = threading.local()
+
+    def init_per_thread_state(self):
+        # Ensure state is initialized just once per-thread
+        if not hasattr(self._thread_local, "init"):
+            self._thread_local.init = True
+            self._thread_local.last_nonce = ""
+            self._thread_local.nonce_count = 0
+            self._thread_local.chal = {}
+            self._thread_local.pos = None
+            self._thread_local.num_401_calls = None
+
+    def build_digest_header(self, method, url):
+        """
+        :rtype: str
+        """
+
+        realm = self._thread_local.chal["realm"]
+        nonce = self._thread_local.chal["nonce"]
+        qop = self._thread_local.chal.get("qop")
+        algorithm = self._thread_local.chal.get("algorithm")
+        opaque = self._thread_local.chal.get("opaque")
+        hash_utf8 = None
+
+        if algorithm is None:
+            _algorithm = "MD5"
+        else:
+            _algorithm = algorithm.upper()
+        # lambdas assume digest modules are imported at the top level
+        if _algorithm == "MD5" or _algorithm == "MD5-SESS":
+
+            def md5_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode("utf-8")
+                return hashlib.md5(x).hexdigest()
+
+            hash_utf8 = md5_utf8
+        elif _algorithm == "SHA":
+
+            def sha_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode("utf-8")
+                return hashlib.sha1(x).hexdigest()
+
+            hash_utf8 = sha_utf8
+        elif _algorithm == "SHA-256":
+
+            def sha256_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode("utf-8")
+                return hashlib.sha256(x).hexdigest()
+
+            hash_utf8 = sha256_utf8
+        elif _algorithm == "SHA-512":
+
+            def sha512_utf8(x):
+                if isinstance(x, str):
+                    x = x.encode("utf-8")
+                return hashlib.sha512(x).hexdigest()
+
+            hash_utf8 = sha512_utf8
+
+        KD = lambda s, d: hash_utf8(f"{s}:{d}")  # noqa:E731
+
+        if hash_utf8 is None:
+            return None
+
+        # XXX not implemented yet
+        entdig = None
+        p_parsed = urlparse(url)
+        #: path is request-uri defined in RFC 2616 which should not be empty
+        path = p_parsed.path or "/"
+        if p_parsed.query:
+            path += f"?{p_parsed.query}"
+
+        A1 = f"{self.username}:{realm}:{self.password}"
+        A2 = f"{method}:{path}"
+
+        HA1 = hash_utf8(A1)
+        HA2 = hash_utf8(A2)
+
+        if nonce == self._thread_local.last_nonce:
+            self._thread_local.nonce_count += 1
+        else:
+            self._thread_local.nonce_count = 1
+        ncvalue = f"{self._thread_local.nonce_count:08x}"
+        s = str(self._thread_local.nonce_count).encode("utf-8")
+        s += nonce.encode("utf-8")
+        s += time.ctime().encode("utf-8")
+        s += os.urandom(8)
+
+        cnonce = hashlib.sha1(s).hexdigest()[:16]
+        if _algorithm == "MD5-SESS":
+            HA1 = hash_utf8(f"{HA1}:{nonce}:{cnonce}")
+
+        if not qop:
+            respdig = KD(HA1, f"{nonce}:{HA2}")
+        elif qop == "auth" or "auth" in qop.split(","):
+            noncebit = f"{nonce}:{ncvalue}:{cnonce}:auth:{HA2}"
+            respdig = KD(HA1, noncebit)
+        else:
+            # XXX handle auth-int.
+            return None
+
+        self._thread_local.last_nonce = nonce
+
+        # XXX should the partial digests be encoded too?
+        base = (
+            f'username="{self.username}", realm="{realm}", nonce="{nonce}", '
+            f'uri="{path}", response="{respdig}"'
+        )
+        if opaque:
+            base += f', opaque="{opaque}"'
+        if algorithm:
+            base += f', algorithm="{algorithm}"'
+        if entdig:
+            base += f', digest="{entdig}"'
+        if qop:
+            base += f', qop="auth", nc={ncvalue}, cnonce="{cnonce}"'
+
+        return f"Digest {base}"
+
+    def handle_redirect(self, r, **kwargs):
+        """Reset num_401_calls counter on redirects."""
+        if r.is_redirect:
+            self._thread_local.num_401_calls = 1
+
+    def handle_401(self, r, **kwargs):
+        """
+        Takes the given response and tries digest-auth, if needed.
+
+        :rtype: requests.Response
+        """
+
+        # If response is not 4xx, do not auth
+        # See https://github.com/psf/requests/issues/3772
+        if not 400 <= r.status_code < 500:
+            self._thread_local.num_401_calls = 1
+            return r
+
+        if self._thread_local.pos is not None:
+            # Rewind the file position indicator of the body to where
+            # it was to resend the request.
+            r.request.body.seek(self._thread_local.pos)
+        s_auth = r.headers.get("www-authenticate", "")
+
+        if "digest" in s_auth.lower() and self._thread_local.num_401_calls < 2:
+
+            self._thread_local.num_401_calls += 1
+            pat = re.compile(r"digest ", flags=re.IGNORECASE)
+            self._thread_local.chal = parse_dict_header(pat.sub("", s_auth, count=1))
+
+            # Consume content and release the original connection
+            # to allow our new request to reuse the same one.
+            r.content
+            r.close()
+            prep = r.request.copy()
+            extract_cookies_to_jar(prep._cookies, r.request, r.raw)
+            prep.prepare_cookies(prep._cookies)
+
+            prep.headers["Authorization"] = self.build_digest_header(
+                prep.method, prep.url
+            )
+            _r = r.connection.send(prep, **kwargs)
+            _r.history.append(r)
+            _r.request = prep
+
+            return _r
+
+        self._thread_local.num_401_calls = 1
+        return r
+
+    def __call__(self, r):
+        # Initialize per-thread state, if needed
+        self.init_per_thread_state()
+        # If we have a saved nonce, skip the 401
+        if self._thread_local.last_nonce:
+            r.headers["Authorization"] = self.build_digest_header(r.method, r.url)
+        try:
+            self._thread_local.pos = r.body.tell()
+        except AttributeError:
+            # In the case of HTTPDigestAuth being reused and the body of
+            # the previous request was a file-like object, pos has the
+            # file position of the previous body. Ensure it's set to
+            # None.
+            self._thread_local.pos = None
+        r.register_hook("response", self.handle_401)
+        r.register_hook("response", self.handle_redirect)
+        self._thread_local.num_401_calls = 1
+
+        return r
+
+    def __eq__(self, other):
+        return all(
+            [
+                self.username == getattr(other, "username", None),
+                self.password == getattr(other, "password", None),
+            ]
+        )
+
+    def __ne__(self, other):
+        return not self == other
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/certs.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/certs.py
new file mode 100644
index 0000000..38696a1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/certs.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+"""
+requests.certs
+~~~~~~~~~~~~~~
+
+This module returns the preferred default CA certificate bundle. There is
+only one — the one from the certifi package.
+
+If you are packaging Requests, e.g., for a Linux distribution or a managed
+environment, you can change the definition of where() to return a separately
+packaged CA bundle.
+"""
+
+import os
+
+if "_PIP_STANDALONE_CERT" not in os.environ:
+    from pip._vendor.certifi import where
+else:
+    def where():
+        return os.environ["_PIP_STANDALONE_CERT"]
+
+if __name__ == "__main__":
+    print(where())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/compat.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/compat.py
new file mode 100644
index 0000000..9ab2bb4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/compat.py
@@ -0,0 +1,67 @@
+"""
+requests.compat
+~~~~~~~~~~~~~~~
+
+This module previously handled import compatibility issues
+between Python 2 and Python 3. It remains for backwards
+compatibility until the next major version.
+"""
+
+from pip._vendor import chardet
+
+import sys
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+is_py2 = _ver[0] == 2
+
+#: Python 3.x?
+is_py3 = _ver[0] == 3
+
+# Note: We've patched out simplejson support in pip because it prevents
+#       upgrading simplejson on Windows.
+import json
+from json import JSONDecodeError
+
+# Keep OrderedDict for backwards compatibility.
+from collections import OrderedDict
+from collections.abc import Callable, Mapping, MutableMapping
+from http import cookiejar as cookielib
+from http.cookies import Morsel
+from io import StringIO
+
+# --------------
+# Legacy Imports
+# --------------
+from urllib.parse import (
+    quote,
+    quote_plus,
+    unquote,
+    unquote_plus,
+    urldefrag,
+    urlencode,
+    urljoin,
+    urlparse,
+    urlsplit,
+    urlunparse,
+)
+from urllib.request import (
+    getproxies,
+    getproxies_environment,
+    parse_http_list,
+    proxy_bypass,
+    proxy_bypass_environment,
+)
+
+builtin_str = str
+str = str
+bytes = bytes
+basestring = (str, bytes)
+numeric_types = (int, float)
+integer_types = (int,)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/cookies.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/cookies.py
new file mode 100644
index 0000000..bf54ab2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/cookies.py
@@ -0,0 +1,561 @@
+"""
+requests.cookies
+~~~~~~~~~~~~~~~~
+
+Compatibility code to be able to use `cookielib.CookieJar` with requests.
+
+requests.utils imports from here, so be careful with imports.
+"""
+
+import calendar
+import copy
+import time
+
+from ._internal_utils import to_native_string
+from .compat import Morsel, MutableMapping, cookielib, urlparse, urlunparse
+
+try:
+    import threading
+except ImportError:
+    import dummy_threading as threading
+
+
+class MockRequest:
+    """Wraps a `requests.Request` to mimic a `urllib2.Request`.
+
+    The code in `cookielib.CookieJar` expects this interface in order to correctly
+    manage cookie policies, i.e., determine whether a cookie can be set, given the
+    domains of the request and the cookie.
+
+    The original request object is read-only. The client is responsible for collecting
+    the new headers via `get_new_headers()` and interpreting them appropriately. You
+    probably want `get_cookie_header`, defined below.
+    """
+
+    def __init__(self, request):
+        self._r = request
+        self._new_headers = {}
+        self.type = urlparse(self._r.url).scheme
+
+    def get_type(self):
+        return self.type
+
+    def get_host(self):
+        return urlparse(self._r.url).netloc
+
+    def get_origin_req_host(self):
+        return self.get_host()
+
+    def get_full_url(self):
+        # Only return the response's URL if the user hadn't set the Host
+        # header
+        if not self._r.headers.get("Host"):
+            return self._r.url
+        # If they did set it, retrieve it and reconstruct the expected domain
+        host = to_native_string(self._r.headers["Host"], encoding="utf-8")
+        parsed = urlparse(self._r.url)
+        # Reconstruct the URL as we expect it
+        return urlunparse(
+            [
+                parsed.scheme,
+                host,
+                parsed.path,
+                parsed.params,
+                parsed.query,
+                parsed.fragment,
+            ]
+        )
+
+    def is_unverifiable(self):
+        return True
+
+    def has_header(self, name):
+        return name in self._r.headers or name in self._new_headers
+
+    def get_header(self, name, default=None):
+        return self._r.headers.get(name, self._new_headers.get(name, default))
+
+    def add_header(self, key, val):
+        """cookielib has no legitimate use for this method; add it back if you find one."""
+        raise NotImplementedError(
+            "Cookie headers should be added with add_unredirected_header()"
+        )
+
+    def add_unredirected_header(self, name, value):
+        self._new_headers[name] = value
+
+    def get_new_headers(self):
+        return self._new_headers
+
+    @property
+    def unverifiable(self):
+        return self.is_unverifiable()
+
+    @property
+    def origin_req_host(self):
+        return self.get_origin_req_host()
+
+    @property
+    def host(self):
+        return self.get_host()
+
+
+class MockResponse:
+    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
+
+    ...what? Basically, expose the parsed HTTP headers from the server response
+    the way `cookielib` expects to see them.
+    """
+
+    def __init__(self, headers):
+        """Make a MockResponse for `cookielib` to read.
+
+        :param headers: a httplib.HTTPMessage or analogous carrying the headers
+        """
+        self._headers = headers
+
+    def info(self):
+        return self._headers
+
+    def getheaders(self, name):
+        self._headers.getheaders(name)
+
+
+def extract_cookies_to_jar(jar, request, response):
+    """Extract the cookies from the response into a CookieJar.
+
+    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
+    :param request: our own requests.Request object
+    :param response: urllib3.HTTPResponse object
+    """
+    if not (hasattr(response, "_original_response") and response._original_response):
+        return
+    # the _original_response field is the wrapped httplib.HTTPResponse object,
+    req = MockRequest(request)
+    # pull out the HTTPMessage with the headers and put it in the mock:
+    res = MockResponse(response._original_response.msg)
+    jar.extract_cookies(res, req)
+
+
+def get_cookie_header(jar, request):
+    """
+    Produce an appropriate Cookie header string to be sent with `request`, or None.
+
+    :rtype: str
+    """
+    r = MockRequest(request)
+    jar.add_cookie_header(r)
+    return r.get_new_headers().get("Cookie")
+
+
+def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
+    """Unsets a cookie by name, by default over all domains and paths.
+
+    Wraps CookieJar.clear(), is O(n).
+    """
+    clearables = []
+    for cookie in cookiejar:
+        if cookie.name != name:
+            continue
+        if domain is not None and domain != cookie.domain:
+            continue
+        if path is not None and path != cookie.path:
+            continue
+        clearables.append((cookie.domain, cookie.path, cookie.name))
+
+    for domain, path, name in clearables:
+        cookiejar.clear(domain, path, name)
+
+
+class CookieConflictError(RuntimeError):
+    """There are two cookies that meet the criteria specified in the cookie jar.
+    Use .get and .set and include domain and path args in order to be more specific.
+    """
+
+
+class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
+    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
+    interface.
+
+    This is the CookieJar we create by default for requests and sessions that
+    don't specify one, since some clients may expect response.cookies and
+    session.cookies to support dict operations.
+
+    Requests does not use the dict interface internally; it's just for
+    compatibility with external client code. All requests code should work
+    out of the box with externally provided instances of ``CookieJar``, e.g.
+    ``LWPCookieJar`` and ``FileCookieJar``.
+
+    Unlike a regular CookieJar, this class is pickleable.
+
+    .. warning:: dictionary operations that are normally O(1) may be O(n).
+    """
+
+    def get(self, name, default=None, domain=None, path=None):
+        """Dict-like get() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        try:
+            return self._find_no_duplicates(name, domain, path)
+        except KeyError:
+            return default
+
+    def set(self, name, value, **kwargs):
+        """Dict-like set() that also supports optional domain and path args in
+        order to resolve naming collisions from using one cookie jar over
+        multiple domains.
+        """
+        # support client code that unsets cookies by assignment of a None value:
+        if value is None:
+            remove_cookie_by_name(
+                self, name, domain=kwargs.get("domain"), path=kwargs.get("path")
+            )
+            return
+
+        if isinstance(value, Morsel):
+            c = morsel_to_cookie(value)
+        else:
+            c = create_cookie(name, value, **kwargs)
+        self.set_cookie(c)
+        return c
+
+    def iterkeys(self):
+        """Dict-like iterkeys() that returns an iterator of names of cookies
+        from the jar.
+
+        .. seealso:: itervalues() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.name
+
+    def keys(self):
+        """Dict-like keys() that returns a list of names of cookies from the
+        jar.
+
+        .. seealso:: values() and items().
+        """
+        return list(self.iterkeys())
+
+    def itervalues(self):
+        """Dict-like itervalues() that returns an iterator of values of cookies
+        from the jar.
+
+        .. seealso:: iterkeys() and iteritems().
+        """
+        for cookie in iter(self):
+            yield cookie.value
+
+    def values(self):
+        """Dict-like values() that returns a list of values of cookies from the
+        jar.
+
+        .. seealso:: keys() and items().
+        """
+        return list(self.itervalues())
+
+    def iteritems(self):
+        """Dict-like iteritems() that returns an iterator of name-value tuples
+        from the jar.
+
+        .. seealso:: iterkeys() and itervalues().
+        """
+        for cookie in iter(self):
+            yield cookie.name, cookie.value
+
+    def items(self):
+        """Dict-like items() that returns a list of name-value tuples from the
+        jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
+        vanilla python dict of key value pairs.
+
+        .. seealso:: keys() and values().
+        """
+        return list(self.iteritems())
+
+    def list_domains(self):
+        """Utility method to list all the domains in the jar."""
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain not in domains:
+                domains.append(cookie.domain)
+        return domains
+
+    def list_paths(self):
+        """Utility method to list all the paths in the jar."""
+        paths = []
+        for cookie in iter(self):
+            if cookie.path not in paths:
+                paths.append(cookie.path)
+        return paths
+
+    def multiple_domains(self):
+        """Returns True if there are multiple domains in the jar.
+        Returns False otherwise.
+
+        :rtype: bool
+        """
+        domains = []
+        for cookie in iter(self):
+            if cookie.domain is not None and cookie.domain in domains:
+                return True
+            domains.append(cookie.domain)
+        return False  # there is only one domain in jar
+
+    def get_dict(self, domain=None, path=None):
+        """Takes as an argument an optional domain and path and returns a plain
+        old Python dict of name-value pairs of cookies that meet the
+        requirements.
+
+        :rtype: dict
+        """
+        dictionary = {}
+        for cookie in iter(self):
+            if (domain is None or cookie.domain == domain) and (
+                path is None or cookie.path == path
+            ):
+                dictionary[cookie.name] = cookie.value
+        return dictionary
+
+    def __contains__(self, name):
+        try:
+            return super().__contains__(name)
+        except CookieConflictError:
+            return True
+
+    def __getitem__(self, name):
+        """Dict-like __getitem__() for compatibility with client code. Throws
+        exception if there are more than one cookie with name. In that case,
+        use the more explicit get() method instead.
+
+        .. warning:: operation is O(n), not O(1).
+        """
+        return self._find_no_duplicates(name)
+
+    def __setitem__(self, name, value):
+        """Dict-like __setitem__ for compatibility with client code. Throws
+        exception if there is already a cookie of that name in the jar. In that
+        case, use the more explicit set() method instead.
+        """
+        self.set(name, value)
+
+    def __delitem__(self, name):
+        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
+        ``remove_cookie_by_name()``.
+        """
+        remove_cookie_by_name(self, name)
+
+    def set_cookie(self, cookie, *args, **kwargs):
+        if (
+            hasattr(cookie.value, "startswith")
+            and cookie.value.startswith('"')
+            and cookie.value.endswith('"')
+        ):
+            cookie.value = cookie.value.replace('\\"', "")
+        return super().set_cookie(cookie, *args, **kwargs)
+
+    def update(self, other):
+        """Updates this jar with cookies from another CookieJar or dict-like"""
+        if isinstance(other, cookielib.CookieJar):
+            for cookie in other:
+                self.set_cookie(copy.copy(cookie))
+        else:
+            super().update(other)
+
+    def _find(self, name, domain=None, path=None):
+        """Requests uses this method internally to get cookie values.
+
+        If there are conflicting cookies, _find arbitrarily chooses one.
+        See _find_no_duplicates if you want an exception thrown if there are
+        conflicting cookies.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :return: cookie.value
+        """
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        return cookie.value
+
+        raise KeyError(f"name={name!r}, domain={domain!r}, path={path!r}")
+
+    def _find_no_duplicates(self, name, domain=None, path=None):
+        """Both ``__get_item__`` and ``get`` call this function: it's never
+        used elsewhere in Requests.
+
+        :param name: a string containing name of cookie
+        :param domain: (optional) string containing domain of cookie
+        :param path: (optional) string containing path of cookie
+        :raises KeyError: if cookie is not found
+        :raises CookieConflictError: if there are multiple cookies
+            that match name and optionally domain and path
+        :return: cookie.value
+        """
+        toReturn = None
+        for cookie in iter(self):
+            if cookie.name == name:
+                if domain is None or cookie.domain == domain:
+                    if path is None or cookie.path == path:
+                        if toReturn is not None:
+                            # if there are multiple cookies that meet passed in criteria
+                            raise CookieConflictError(
+                                f"There are multiple cookies with name, {name!r}"
+                            )
+                        # we will eventually return this as long as no cookie conflict
+                        toReturn = cookie.value
+
+        if toReturn:
+            return toReturn
+        raise KeyError(f"name={name!r}, domain={domain!r}, path={path!r}")
+
+    def __getstate__(self):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        state = self.__dict__.copy()
+        # remove the unpickleable RLock object
+        state.pop("_cookies_lock")
+        return state
+
+    def __setstate__(self, state):
+        """Unlike a normal CookieJar, this class is pickleable."""
+        self.__dict__.update(state)
+        if "_cookies_lock" not in self.__dict__:
+            self._cookies_lock = threading.RLock()
+
+    def copy(self):
+        """Return a copy of this RequestsCookieJar."""
+        new_cj = RequestsCookieJar()
+        new_cj.set_policy(self.get_policy())
+        new_cj.update(self)
+        return new_cj
+
+    def get_policy(self):
+        """Return the CookiePolicy instance used."""
+        return self._policy
+
+
+def _copy_cookie_jar(jar):
+    if jar is None:
+        return None
+
+    if hasattr(jar, "copy"):
+        # We're dealing with an instance of RequestsCookieJar
+        return jar.copy()
+    # We're dealing with a generic CookieJar instance
+    new_jar = copy.copy(jar)
+    new_jar.clear()
+    for cookie in jar:
+        new_jar.set_cookie(copy.copy(cookie))
+    return new_jar
+
+
+def create_cookie(name, value, **kwargs):
+    """Make a cookie from underspecified parameters.
+
+    By default, the pair of `name` and `value` will be set for the domain ''
+    and sent on every request (this is sometimes called a "supercookie").
+    """
+    result = {
+        "version": 0,
+        "name": name,
+        "value": value,
+        "port": None,
+        "domain": "",
+        "path": "/",
+        "secure": False,
+        "expires": None,
+        "discard": True,
+        "comment": None,
+        "comment_url": None,
+        "rest": {"HttpOnly": None},
+        "rfc2109": False,
+    }
+
+    badargs = set(kwargs) - set(result)
+    if badargs:
+        raise TypeError(
+            f"create_cookie() got unexpected keyword arguments: {list(badargs)}"
+        )
+
+    result.update(kwargs)
+    result["port_specified"] = bool(result["port"])
+    result["domain_specified"] = bool(result["domain"])
+    result["domain_initial_dot"] = result["domain"].startswith(".")
+    result["path_specified"] = bool(result["path"])
+
+    return cookielib.Cookie(**result)
+
+
+def morsel_to_cookie(morsel):
+    """Convert a Morsel object into a Cookie containing the one k/v pair."""
+
+    expires = None
+    if morsel["max-age"]:
+        try:
+            expires = int(time.time() + int(morsel["max-age"]))
+        except ValueError:
+            raise TypeError(f"max-age: {morsel['max-age']} must be integer")
+    elif morsel["expires"]:
+        time_template = "%a, %d-%b-%Y %H:%M:%S GMT"
+        expires = calendar.timegm(time.strptime(morsel["expires"], time_template))
+    return create_cookie(
+        comment=morsel["comment"],
+        comment_url=bool(morsel["comment"]),
+        discard=False,
+        domain=morsel["domain"],
+        expires=expires,
+        name=morsel.key,
+        path=morsel["path"],
+        port=None,
+        rest={"HttpOnly": morsel["httponly"]},
+        rfc2109=False,
+        secure=bool(morsel["secure"]),
+        value=morsel.value,
+        version=morsel["version"] or 0,
+    )
+
+
+def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :param cookiejar: (optional) A cookiejar to add the cookies to.
+    :param overwrite: (optional) If False, will not replace cookies
+        already in the jar with new ones.
+    :rtype: CookieJar
+    """
+    if cookiejar is None:
+        cookiejar = RequestsCookieJar()
+
+    if cookie_dict is not None:
+        names_from_jar = [cookie.name for cookie in cookiejar]
+        for name in cookie_dict:
+            if overwrite or (name not in names_from_jar):
+                cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
+
+    return cookiejar
+
+
+def merge_cookies(cookiejar, cookies):
+    """Add cookies to cookiejar and returns a merged CookieJar.
+
+    :param cookiejar: CookieJar object to add the cookies to.
+    :param cookies: Dictionary or CookieJar object to be added.
+    :rtype: CookieJar
+    """
+    if not isinstance(cookiejar, cookielib.CookieJar):
+        raise ValueError("You can only merge into CookieJar")
+
+    if isinstance(cookies, dict):
+        cookiejar = cookiejar_from_dict(cookies, cookiejar=cookiejar, overwrite=False)
+    elif isinstance(cookies, cookielib.CookieJar):
+        try:
+            cookiejar.update(cookies)
+        except AttributeError:
+            for cookie_in_jar in cookies:
+                cookiejar.set_cookie(cookie_in_jar)
+
+    return cookiejar
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/exceptions.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/exceptions.py
new file mode 100644
index 0000000..168d073
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/exceptions.py
@@ -0,0 +1,141 @@
+"""
+requests.exceptions
+~~~~~~~~~~~~~~~~~~~
+
+This module contains the set of Requests' exceptions.
+"""
+from pip._vendor.urllib3.exceptions import HTTPError as BaseHTTPError
+
+from .compat import JSONDecodeError as CompatJSONDecodeError
+
+
+class RequestException(IOError):
+    """There was an ambiguous exception that occurred while handling your
+    request.
+    """
+
+    def __init__(self, *args, **kwargs):
+        """Initialize RequestException with `request` and `response` objects."""
+        response = kwargs.pop("response", None)
+        self.response = response
+        self.request = kwargs.pop("request", None)
+        if response is not None and not self.request and hasattr(response, "request"):
+            self.request = self.response.request
+        super().__init__(*args, **kwargs)
+
+
+class InvalidJSONError(RequestException):
+    """A JSON error occurred."""
+
+
+class JSONDecodeError(InvalidJSONError, CompatJSONDecodeError):
+    """Couldn't decode the text into json"""
+
+    def __init__(self, *args, **kwargs):
+        """
+        Construct the JSONDecodeError instance first with all
+        args. Then use it's args to construct the IOError so that
+        the json specific args aren't used as IOError specific args
+        and the error message from JSONDecodeError is preserved.
+        """
+        CompatJSONDecodeError.__init__(self, *args)
+        InvalidJSONError.__init__(self, *self.args, **kwargs)
+
+
+class HTTPError(RequestException):
+    """An HTTP error occurred."""
+
+
+class ConnectionError(RequestException):
+    """A Connection error occurred."""
+
+
+class ProxyError(ConnectionError):
+    """A proxy error occurred."""
+
+
+class SSLError(ConnectionError):
+    """An SSL error occurred."""
+
+
+class Timeout(RequestException):
+    """The request timed out.
+
+    Catching this error will catch both
+    :exc:`~requests.exceptions.ConnectTimeout` and
+    :exc:`~requests.exceptions.ReadTimeout` errors.
+    """
+
+
+class ConnectTimeout(ConnectionError, Timeout):
+    """The request timed out while trying to connect to the remote server.
+
+    Requests that produced this error are safe to retry.
+    """
+
+
+class ReadTimeout(Timeout):
+    """The server did not send any data in the allotted amount of time."""
+
+
+class URLRequired(RequestException):
+    """A valid URL is required to make a request."""
+
+
+class TooManyRedirects(RequestException):
+    """Too many redirects."""
+
+
+class MissingSchema(RequestException, ValueError):
+    """The URL scheme (e.g. http or https) is missing."""
+
+
+class InvalidSchema(RequestException, ValueError):
+    """The URL scheme provided is either invalid or unsupported."""
+
+
+class InvalidURL(RequestException, ValueError):
+    """The URL provided was somehow invalid."""
+
+
+class InvalidHeader(RequestException, ValueError):
+    """The header value provided was somehow invalid."""
+
+
+class InvalidProxyURL(InvalidURL):
+    """The proxy URL provided is invalid."""
+
+
+class ChunkedEncodingError(RequestException):
+    """The server declared chunked encoding but sent an invalid chunk."""
+
+
+class ContentDecodingError(RequestException, BaseHTTPError):
+    """Failed to decode response content."""
+
+
+class StreamConsumedError(RequestException, TypeError):
+    """The content for this response was already consumed."""
+
+
+class RetryError(RequestException):
+    """Custom retries logic failed"""
+
+
+class UnrewindableBodyError(RequestException):
+    """Requests encountered an error when trying to rewind a body."""
+
+
+# Warnings
+
+
+class RequestsWarning(Warning):
+    """Base warning for Requests."""
+
+
+class FileModeWarning(RequestsWarning, DeprecationWarning):
+    """A file was opened in text mode, but Requests determined its binary length."""
+
+
+class RequestsDependencyWarning(RequestsWarning):
+    """An imported dependency doesn't match the expected version range."""
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/help.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/help.py
new file mode 100644
index 0000000..2d292c2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/help.py
@@ -0,0 +1,131 @@
+"""Module containing bug report helper(s)."""
+
+import json
+import platform
+import ssl
+import sys
+
+from pip._vendor import idna
+from pip._vendor import urllib3
+
+from . import __version__ as requests_version
+
+charset_normalizer = None
+
+try:
+    from pip._vendor import chardet
+except ImportError:
+    chardet = None
+
+try:
+    from pip._vendor.urllib3.contrib import pyopenssl
+except ImportError:
+    pyopenssl = None
+    OpenSSL = None
+    cryptography = None
+else:
+    import cryptography
+    import OpenSSL
+
+
+def _implementation():
+    """Return a dict with the Python implementation and version.
+
+    Provide both the name and the version of the Python implementation
+    currently running. For example, on CPython 3.10.3 it will return
+    {'name': 'CPython', 'version': '3.10.3'}.
+
+    This function works best on CPython and PyPy: in particular, it probably
+    doesn't work for Jython or IronPython. Future investigation should be done
+    to work out the correct shape of the code for those platforms.
+    """
+    implementation = platform.python_implementation()
+
+    if implementation == "CPython":
+        implementation_version = platform.python_version()
+    elif implementation == "PyPy":
+        implementation_version = "{}.{}.{}".format(
+            sys.pypy_version_info.major,
+            sys.pypy_version_info.minor,
+            sys.pypy_version_info.micro,
+        )
+        if sys.pypy_version_info.releaselevel != "final":
+            implementation_version = "".join(
+                [implementation_version, sys.pypy_version_info.releaselevel]
+            )
+    elif implementation == "Jython":
+        implementation_version = platform.python_version()  # Complete Guess
+    elif implementation == "IronPython":
+        implementation_version = platform.python_version()  # Complete Guess
+    else:
+        implementation_version = "Unknown"
+
+    return {"name": implementation, "version": implementation_version}
+
+
+def info():
+    """Generate information for a bug report."""
+    try:
+        platform_info = {
+            "system": platform.system(),
+            "release": platform.release(),
+        }
+    except OSError:
+        platform_info = {
+            "system": "Unknown",
+            "release": "Unknown",
+        }
+
+    implementation_info = _implementation()
+    urllib3_info = {"version": urllib3.__version__}
+    charset_normalizer_info = {"version": None}
+    chardet_info = {"version": None}
+    if charset_normalizer:
+        charset_normalizer_info = {"version": charset_normalizer.__version__}
+    if chardet:
+        chardet_info = {"version": chardet.__version__}
+
+    pyopenssl_info = {
+        "version": None,
+        "openssl_version": "",
+    }
+    if OpenSSL:
+        pyopenssl_info = {
+            "version": OpenSSL.__version__,
+            "openssl_version": f"{OpenSSL.SSL.OPENSSL_VERSION_NUMBER:x}",
+        }
+    cryptography_info = {
+        "version": getattr(cryptography, "__version__", ""),
+    }
+    idna_info = {
+        "version": getattr(idna, "__version__", ""),
+    }
+
+    system_ssl = ssl.OPENSSL_VERSION_NUMBER
+    system_ssl_info = {"version": f"{system_ssl:x}" if system_ssl is not None else ""}
+
+    return {
+        "platform": platform_info,
+        "implementation": implementation_info,
+        "system_ssl": system_ssl_info,
+        "using_pyopenssl": pyopenssl is not None,
+        "using_charset_normalizer": chardet is None,
+        "pyOpenSSL": pyopenssl_info,
+        "urllib3": urllib3_info,
+        "chardet": chardet_info,
+        "charset_normalizer": charset_normalizer_info,
+        "cryptography": cryptography_info,
+        "idna": idna_info,
+        "requests": {
+            "version": requests_version,
+        },
+    }
+
+
+def main():
+    """Pretty-print the bug information as JSON."""
+    print(json.dumps(info(), sort_keys=True, indent=2))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/hooks.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/hooks.py
new file mode 100644
index 0000000..d181ba2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/hooks.py
@@ -0,0 +1,33 @@
+"""
+requests.hooks
+~~~~~~~~~~~~~~
+
+This module provides the capabilities for the Requests hooks system.
+
+Available hooks:
+
+``response``:
+    The response generated from a Request.
+"""
+HOOKS = ["response"]
+
+
+def default_hooks():
+    return {event: [] for event in HOOKS}
+
+
+# TODO: response is the only one
+
+
+def dispatch_hook(key, hooks, hook_data, **kwargs):
+    """Dispatches a hook dictionary on a given piece of data."""
+    hooks = hooks or {}
+    hooks = hooks.get(key)
+    if hooks:
+        if hasattr(hooks, "__call__"):
+            hooks = [hooks]
+        for hook in hooks:
+            _hook_data = hook(hook_data, **kwargs)
+            if _hook_data is not None:
+                hook_data = _hook_data
+    return hook_data
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/models.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/models.py
new file mode 100644
index 0000000..b45e810
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/models.py
@@ -0,0 +1,1034 @@
+"""
+requests.models
+~~~~~~~~~~~~~~~
+
+This module contains the primary objects that power Requests.
+"""
+
+import datetime
+
+# Import encoding now, to avoid implicit import later.
+# Implicit import within threads may cause LookupError when standard library is in a ZIP,
+# such as in Embedded Python. See https://github.com/psf/requests/issues/3578.
+import encodings.idna  # noqa: F401
+from io import UnsupportedOperation
+
+from pip._vendor.urllib3.exceptions import (
+    DecodeError,
+    LocationParseError,
+    ProtocolError,
+    ReadTimeoutError,
+    SSLError,
+)
+from pip._vendor.urllib3.fields import RequestField
+from pip._vendor.urllib3.filepost import encode_multipart_formdata
+from pip._vendor.urllib3.util import parse_url
+
+from ._internal_utils import to_native_string, unicode_is_ascii
+from .auth import HTTPBasicAuth
+from .compat import (
+    Callable,
+    JSONDecodeError,
+    Mapping,
+    basestring,
+    builtin_str,
+    chardet,
+    cookielib,
+)
+from .compat import json as complexjson
+from .compat import urlencode, urlsplit, urlunparse
+from .cookies import _copy_cookie_jar, cookiejar_from_dict, get_cookie_header
+from .exceptions import (
+    ChunkedEncodingError,
+    ConnectionError,
+    ContentDecodingError,
+    HTTPError,
+    InvalidJSONError,
+    InvalidURL,
+)
+from .exceptions import JSONDecodeError as RequestsJSONDecodeError
+from .exceptions import MissingSchema
+from .exceptions import SSLError as RequestsSSLError
+from .exceptions import StreamConsumedError
+from .hooks import default_hooks
+from .status_codes import codes
+from .structures import CaseInsensitiveDict
+from .utils import (
+    check_header_validity,
+    get_auth_from_url,
+    guess_filename,
+    guess_json_utf,
+    iter_slices,
+    parse_header_links,
+    requote_uri,
+    stream_decode_response_unicode,
+    super_len,
+    to_key_val_list,
+)
+
+#: The set of HTTP status codes that indicate an automatically
+#: processable redirect.
+REDIRECT_STATI = (
+    codes.moved,  # 301
+    codes.found,  # 302
+    codes.other,  # 303
+    codes.temporary_redirect,  # 307
+    codes.permanent_redirect,  # 308
+)
+
+DEFAULT_REDIRECT_LIMIT = 30
+CONTENT_CHUNK_SIZE = 10 * 1024
+ITER_CHUNK_SIZE = 512
+
+
+class RequestEncodingMixin:
+    @property
+    def path_url(self):
+        """Build the path URL to use."""
+
+        url = []
+
+        p = urlsplit(self.url)
+
+        path = p.path
+        if not path:
+            path = "/"
+
+        url.append(path)
+
+        query = p.query
+        if query:
+            url.append("?")
+            url.append(query)
+
+        return "".join(url)
+
+    @staticmethod
+    def _encode_params(data):
+        """Encode parameters in a piece of data.
+
+        Will successfully encode parameters when passed as a dict or a list of
+        2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
+        if parameters are supplied as a dict.
+        """
+
+        if isinstance(data, (str, bytes)):
+            return data
+        elif hasattr(data, "read"):
+            return data
+        elif hasattr(data, "__iter__"):
+            result = []
+            for k, vs in to_key_val_list(data):
+                if isinstance(vs, basestring) or not hasattr(vs, "__iter__"):
+                    vs = [vs]
+                for v in vs:
+                    if v is not None:
+                        result.append(
+                            (
+                                k.encode("utf-8") if isinstance(k, str) else k,
+                                v.encode("utf-8") if isinstance(v, str) else v,
+                            )
+                        )
+            return urlencode(result, doseq=True)
+        else:
+            return data
+
+    @staticmethod
+    def _encode_files(files, data):
+        """Build the body for a multipart/form-data request.
+
+        Will successfully encode files when passed as a dict or a list of
+        tuples. Order is retained if data is a list of tuples but arbitrary
+        if parameters are supplied as a dict.
+        The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
+        or 4-tuples (filename, fileobj, contentype, custom_headers).
+        """
+        if not files:
+            raise ValueError("Files must be provided.")
+        elif isinstance(data, basestring):
+            raise ValueError("Data must not be a string.")
+
+        new_fields = []
+        fields = to_key_val_list(data or {})
+        files = to_key_val_list(files or {})
+
+        for field, val in fields:
+            if isinstance(val, basestring) or not hasattr(val, "__iter__"):
+                val = [val]
+            for v in val:
+                if v is not None:
+                    # Don't call str() on bytestrings: in Py3 it all goes wrong.
+                    if not isinstance(v, bytes):
+                        v = str(v)
+
+                    new_fields.append(
+                        (
+                            field.decode("utf-8")
+                            if isinstance(field, bytes)
+                            else field,
+                            v.encode("utf-8") if isinstance(v, str) else v,
+                        )
+                    )
+
+        for (k, v) in files:
+            # support for explicit filename
+            ft = None
+            fh = None
+            if isinstance(v, (tuple, list)):
+                if len(v) == 2:
+                    fn, fp = v
+                elif len(v) == 3:
+                    fn, fp, ft = v
+                else:
+                    fn, fp, ft, fh = v
+            else:
+                fn = guess_filename(v) or k
+                fp = v
+
+            if isinstance(fp, (str, bytes, bytearray)):
+                fdata = fp
+            elif hasattr(fp, "read"):
+                fdata = fp.read()
+            elif fp is None:
+                continue
+            else:
+                fdata = fp
+
+            rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
+            rf.make_multipart(content_type=ft)
+            new_fields.append(rf)
+
+        body, content_type = encode_multipart_formdata(new_fields)
+
+        return body, content_type
+
+
+class RequestHooksMixin:
+    def register_hook(self, event, hook):
+        """Properly register a hook."""
+
+        if event not in self.hooks:
+            raise ValueError(f'Unsupported event specified, with event name "{event}"')
+
+        if isinstance(hook, Callable):
+            self.hooks[event].append(hook)
+        elif hasattr(hook, "__iter__"):
+            self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
+
+    def deregister_hook(self, event, hook):
+        """Deregister a previously registered hook.
+        Returns True if the hook existed, False if not.
+        """
+
+        try:
+            self.hooks[event].remove(hook)
+            return True
+        except ValueError:
+            return False
+
+
+class Request(RequestHooksMixin):
+    """A user-created :class:`Request <Request>` object.
+
+    Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
+
+    :param method: HTTP method to use.
+    :param url: URL to send.
+    :param headers: dictionary of headers to send.
+    :param files: dictionary of {filename: fileobject} files to multipart upload.
+    :param data: the body to attach to the request. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param json: json for the body to attach to the request (if files or data is not specified).
+    :param params: URL parameters to append to the URL. If a dictionary or
+        list of tuples ``[(key, value)]`` is provided, form-encoding will
+        take place.
+    :param auth: Auth handler or (user, pass) tuple.
+    :param cookies: dictionary or CookieJar of cookies to attach to this request.
+    :param hooks: dictionary of callback hooks, for internal usage.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> req.prepare()
+      <PreparedRequest [GET]>
+    """
+
+    def __init__(
+        self,
+        method=None,
+        url=None,
+        headers=None,
+        files=None,
+        data=None,
+        params=None,
+        auth=None,
+        cookies=None,
+        hooks=None,
+        json=None,
+    ):
+
+        # Default empty dicts for dict params.
+        data = [] if data is None else data
+        files = [] if files is None else files
+        headers = {} if headers is None else headers
+        params = {} if params is None else params
+        hooks = {} if hooks is None else hooks
+
+        self.hooks = default_hooks()
+        for (k, v) in list(hooks.items()):
+            self.register_hook(event=k, hook=v)
+
+        self.method = method
+        self.url = url
+        self.headers = headers
+        self.files = files
+        self.data = data
+        self.json = json
+        self.params = params
+        self.auth = auth
+        self.cookies = cookies
+
+    def __repr__(self):
+        return f"<Request [{self.method}]>"
+
+    def prepare(self):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
+        p = PreparedRequest()
+        p.prepare(
+            method=self.method,
+            url=self.url,
+            headers=self.headers,
+            files=self.files,
+            data=self.data,
+            json=self.json,
+            params=self.params,
+            auth=self.auth,
+            cookies=self.cookies,
+            hooks=self.hooks,
+        )
+        return p
+
+
+class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
+    """The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
+    containing the exact bytes that will be sent to the server.
+
+    Instances are generated from a :class:`Request <Request>` object, and
+    should not be instantiated manually; doing so may produce undesirable
+    effects.
+
+    Usage::
+
+      >>> import requests
+      >>> req = requests.Request('GET', 'https://httpbin.org/get')
+      >>> r = req.prepare()
+      >>> r
+      <PreparedRequest [GET]>
+
+      >>> s = requests.Session()
+      >>> s.send(r)
+      <Response [200]>
+    """
+
+    def __init__(self):
+        #: HTTP verb to send to the server.
+        self.method = None
+        #: HTTP URL to send the request to.
+        self.url = None
+        #: dictionary of HTTP headers.
+        self.headers = None
+        # The `CookieJar` used to create the Cookie header will be stored here
+        # after prepare_cookies is called
+        self._cookies = None
+        #: request body to send to the server.
+        self.body = None
+        #: dictionary of callback hooks, for internal usage.
+        self.hooks = default_hooks()
+        #: integer denoting starting position of a readable file-like body.
+        self._body_position = None
+
+    def prepare(
+        self,
+        method=None,
+        url=None,
+        headers=None,
+        files=None,
+        data=None,
+        params=None,
+        auth=None,
+        cookies=None,
+        hooks=None,
+        json=None,
+    ):
+        """Prepares the entire request with the given parameters."""
+
+        self.prepare_method(method)
+        self.prepare_url(url, params)
+        self.prepare_headers(headers)
+        self.prepare_cookies(cookies)
+        self.prepare_body(data, files, json)
+        self.prepare_auth(auth, url)
+
+        # Note that prepare_auth must be last to enable authentication schemes
+        # such as OAuth to work on a fully prepared request.
+
+        # This MUST go after prepare_auth. Authenticators could add a hook
+        self.prepare_hooks(hooks)
+
+    def __repr__(self):
+        return f"<PreparedRequest [{self.method}]>"
+
+    def copy(self):
+        p = PreparedRequest()
+        p.method = self.method
+        p.url = self.url
+        p.headers = self.headers.copy() if self.headers is not None else None
+        p._cookies = _copy_cookie_jar(self._cookies)
+        p.body = self.body
+        p.hooks = self.hooks
+        p._body_position = self._body_position
+        return p
+
+    def prepare_method(self, method):
+        """Prepares the given HTTP method."""
+        self.method = method
+        if self.method is not None:
+            self.method = to_native_string(self.method.upper())
+
+    @staticmethod
+    def _get_idna_encoded_host(host):
+        from pip._vendor import idna
+
+        try:
+            host = idna.encode(host, uts46=True).decode("utf-8")
+        except idna.IDNAError:
+            raise UnicodeError
+        return host
+
+    def prepare_url(self, url, params):
+        """Prepares the given HTTP URL."""
+        #: Accept objects that have string representations.
+        #: We're unable to blindly call unicode/str functions
+        #: as this will include the bytestring indicator (b'')
+        #: on python 3.x.
+        #: https://github.com/psf/requests/pull/2238
+        if isinstance(url, bytes):
+            url = url.decode("utf8")
+        else:
+            url = str(url)
+
+        # Remove leading whitespaces from url
+        url = url.lstrip()
+
+        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
+        # `data` etc to work around exceptions from `url_parse`, which
+        # handles RFC 3986 only.
+        if ":" in url and not url.lower().startswith("http"):
+            self.url = url
+            return
+
+        # Support for unicode domain names and paths.
+        try:
+            scheme, auth, host, port, path, query, fragment = parse_url(url)
+        except LocationParseError as e:
+            raise InvalidURL(*e.args)
+
+        if not scheme:
+            raise MissingSchema(
+                f"Invalid URL {url!r}: No scheme supplied. "
+                f"Perhaps you meant http://{url}?"
+            )
+
+        if not host:
+            raise InvalidURL(f"Invalid URL {url!r}: No host supplied")
+
+        # In general, we want to try IDNA encoding the hostname if the string contains
+        # non-ASCII characters. This allows users to automatically get the correct IDNA
+        # behaviour. For strings containing only ASCII characters, we need to also verify
+        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.
+        if not unicode_is_ascii(host):
+            try:
+                host = self._get_idna_encoded_host(host)
+            except UnicodeError:
+                raise InvalidURL("URL has an invalid label.")
+        elif host.startswith(("*", ".")):
+            raise InvalidURL("URL has an invalid label.")
+
+        # Carefully reconstruct the network location
+        netloc = auth or ""
+        if netloc:
+            netloc += "@"
+        netloc += host
+        if port:
+            netloc += f":{port}"
+
+        # Bare domains aren't valid URLs.
+        if not path:
+            path = "/"
+
+        if isinstance(params, (str, bytes)):
+            params = to_native_string(params)
+
+        enc_params = self._encode_params(params)
+        if enc_params:
+            if query:
+                query = f"{query}&{enc_params}"
+            else:
+                query = enc_params
+
+        url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
+        self.url = url
+
+    def prepare_headers(self, headers):
+        """Prepares the given HTTP headers."""
+
+        self.headers = CaseInsensitiveDict()
+        if headers:
+            for header in headers.items():
+                # Raise exception on invalid header value.
+                check_header_validity(header)
+                name, value = header
+                self.headers[to_native_string(name)] = value
+
+    def prepare_body(self, data, files, json=None):
+        """Prepares the given HTTP body data."""
+
+        # Check if file, fo, generator, iterator.
+        # If not, run through normal process.
+
+        # Nottin' on you.
+        body = None
+        content_type = None
+
+        if not data and json is not None:
+            # urllib3 requires a bytes-like body. Python 2's json.dumps
+            # provides this natively, but Python 3 gives a Unicode string.
+            content_type = "application/json"
+
+            try:
+                body = complexjson.dumps(json, allow_nan=False)
+            except ValueError as ve:
+                raise InvalidJSONError(ve, request=self)
+
+            if not isinstance(body, bytes):
+                body = body.encode("utf-8")
+
+        is_stream = all(
+            [
+                hasattr(data, "__iter__"),
+                not isinstance(data, (basestring, list, tuple, Mapping)),
+            ]
+        )
+
+        if is_stream:
+            try:
+                length = super_len(data)
+            except (TypeError, AttributeError, UnsupportedOperation):
+                length = None
+
+            body = data
+
+            if getattr(body, "tell", None) is not None:
+                # Record the current file position before reading.
+                # This will allow us to rewind a file in the event
+                # of a redirect.
+                try:
+                    self._body_position = body.tell()
+                except OSError:
+                    # This differentiates from None, allowing us to catch
+                    # a failed `tell()` later when trying to rewind the body
+                    self._body_position = object()
+
+            if files:
+                raise NotImplementedError(
+                    "Streamed bodies and files are mutually exclusive."
+                )
+
+            if length:
+                self.headers["Content-Length"] = builtin_str(length)
+            else:
+                self.headers["Transfer-Encoding"] = "chunked"
+        else:
+            # Multi-part file uploads.
+            if files:
+                (body, content_type) = self._encode_files(files, data)
+            else:
+                if data:
+                    body = self._encode_params(data)
+                    if isinstance(data, basestring) or hasattr(data, "read"):
+                        content_type = None
+                    else:
+                        content_type = "application/x-www-form-urlencoded"
+
+            self.prepare_content_length(body)
+
+            # Add content-type if it wasn't explicitly provided.
+            if content_type and ("content-type" not in self.headers):
+                self.headers["Content-Type"] = content_type
+
+        self.body = body
+
+    def prepare_content_length(self, body):
+        """Prepare Content-Length header based on request method and body"""
+        if body is not None:
+            length = super_len(body)
+            if length:
+                # If length exists, set it. Otherwise, we fallback
+                # to Transfer-Encoding: chunked.
+                self.headers["Content-Length"] = builtin_str(length)
+        elif (
+            self.method not in ("GET", "HEAD")
+            and self.headers.get("Content-Length") is None
+        ):
+            # Set Content-Length to 0 for methods that can have a body
+            # but don't provide one. (i.e. not GET or HEAD)
+            self.headers["Content-Length"] = "0"
+
+    def prepare_auth(self, auth, url=""):
+        """Prepares the given HTTP auth data."""
+
+        # If no Auth is explicitly provided, extract it from the URL first.
+        if auth is None:
+            url_auth = get_auth_from_url(self.url)
+            auth = url_auth if any(url_auth) else None
+
+        if auth:
+            if isinstance(auth, tuple) and len(auth) == 2:
+                # special-case basic HTTP auth
+                auth = HTTPBasicAuth(*auth)
+
+            # Allow auth to make its changes.
+            r = auth(self)
+
+            # Update self to reflect the auth changes.
+            self.__dict__.update(r.__dict__)
+
+            # Recompute Content-Length
+            self.prepare_content_length(self.body)
+
+    def prepare_cookies(self, cookies):
+        """Prepares the given HTTP cookie data.
+
+        This function eventually generates a ``Cookie`` header from the
+        given cookies using cookielib. Due to cookielib's design, the header
+        will not be regenerated if it already exists, meaning this function
+        can only be called once for the life of the
+        :class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
+        to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
+        header is removed beforehand.
+        """
+        if isinstance(cookies, cookielib.CookieJar):
+            self._cookies = cookies
+        else:
+            self._cookies = cookiejar_from_dict(cookies)
+
+        cookie_header = get_cookie_header(self._cookies, self)
+        if cookie_header is not None:
+            self.headers["Cookie"] = cookie_header
+
+    def prepare_hooks(self, hooks):
+        """Prepares the given hooks."""
+        # hooks can be passed as None to the prepare method and to this
+        # method. To prevent iterating over None, simply use an empty list
+        # if hooks is False-y
+        hooks = hooks or []
+        for event in hooks:
+            self.register_hook(event, hooks[event])
+
+
+class Response:
+    """The :class:`Response <Response>` object, which contains a
+    server's response to an HTTP request.
+    """
+
+    __attrs__ = [
+        "_content",
+        "status_code",
+        "headers",
+        "url",
+        "history",
+        "encoding",
+        "reason",
+        "cookies",
+        "elapsed",
+        "request",
+    ]
+
+    def __init__(self):
+        self._content = False
+        self._content_consumed = False
+        self._next = None
+
+        #: Integer Code of responded HTTP Status, e.g. 404 or 200.
+        self.status_code = None
+
+        #: Case-insensitive Dictionary of Response Headers.
+        #: For example, ``headers['content-encoding']`` will return the
+        #: value of a ``'Content-Encoding'`` response header.
+        self.headers = CaseInsensitiveDict()
+
+        #: File-like object representation of response (for advanced usage).
+        #: Use of ``raw`` requires that ``stream=True`` be set on the request.
+        #: This requirement does not apply for use internally to Requests.
+        self.raw = None
+
+        #: Final URL location of Response.
+        self.url = None
+
+        #: Encoding to decode with when accessing r.text.
+        self.encoding = None
+
+        #: A list of :class:`Response <Response>` objects from
+        #: the history of the Request. Any redirect responses will end
+        #: up here. The list is sorted from the oldest to the most recent request.
+        self.history = []
+
+        #: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
+        self.reason = None
+
+        #: A CookieJar of Cookies the server sent back.
+        self.cookies = cookiejar_from_dict({})
+
+        #: The amount of time elapsed between sending the request
+        #: and the arrival of the response (as a timedelta).
+        #: This property specifically measures the time taken between sending
+        #: the first byte of the request and finishing parsing the headers. It
+        #: is therefore unaffected by consuming the response content or the
+        #: value of the ``stream`` keyword argument.
+        self.elapsed = datetime.timedelta(0)
+
+        #: The :class:`PreparedRequest <PreparedRequest>` object to which this
+        #: is a response.
+        self.request = None
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def __getstate__(self):
+        # Consume everything; accessing the content attribute makes
+        # sure the content has been fully read.
+        if not self._content_consumed:
+            self.content
+
+        return {attr: getattr(self, attr, None) for attr in self.__attrs__}
+
+    def __setstate__(self, state):
+        for name, value in state.items():
+            setattr(self, name, value)
+
+        # pickled objects do not have .raw
+        setattr(self, "_content_consumed", True)
+        setattr(self, "raw", None)
+
+    def __repr__(self):
+        return f"<Response [{self.status_code}]>"
+
+    def __bool__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __nonzero__(self):
+        """Returns True if :attr:`status_code` is less than 400.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code, is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        return self.ok
+
+    def __iter__(self):
+        """Allows you to use a response as an iterator."""
+        return self.iter_content(128)
+
+    @property
+    def ok(self):
+        """Returns True if :attr:`status_code` is less than 400, False if not.
+
+        This attribute checks if the status code of the response is between
+        400 and 600 to see if there was a client error or a server error. If
+        the status code is between 200 and 400, this will return True. This
+        is **not** a check to see if the response code is ``200 OK``.
+        """
+        try:
+            self.raise_for_status()
+        except HTTPError:
+            return False
+        return True
+
+    @property
+    def is_redirect(self):
+        """True if this Response is a well-formed HTTP redirect that could have
+        been processed automatically (by :meth:`Session.resolve_redirects`).
+        """
+        return "location" in self.headers and self.status_code in REDIRECT_STATI
+
+    @property
+    def is_permanent_redirect(self):
+        """True if this Response one of the permanent versions of redirect."""
+        return "location" in self.headers and self.status_code in (
+            codes.moved_permanently,
+            codes.permanent_redirect,
+        )
+
+    @property
+    def next(self):
+        """Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
+        return self._next
+
+    @property
+    def apparent_encoding(self):
+        """The apparent encoding, provided by the charset_normalizer or chardet libraries."""
+        return chardet.detect(self.content)["encoding"]
+
+    def iter_content(self, chunk_size=1, decode_unicode=False):
+        """Iterates over the response data.  When stream=True is set on the
+        request, this avoids reading the content at once into memory for
+        large responses.  The chunk size is the number of bytes it should
+        read into memory.  This is not necessarily the length of each item
+        returned as decoding can take place.
+
+        chunk_size must be of type int or None. A value of None will
+        function differently depending on the value of `stream`.
+        stream=True will read data as it arrives in whatever size the
+        chunks are received. If stream=False, data is returned as
+        a single chunk.
+
+        If decode_unicode is True, content will be decoded using the best
+        available encoding based on the response.
+        """
+
+        def generate():
+            # Special case for urllib3.
+            if hasattr(self.raw, "stream"):
+                try:
+                    yield from self.raw.stream(chunk_size, decode_content=True)
+                except ProtocolError as e:
+                    raise ChunkedEncodingError(e)
+                except DecodeError as e:
+                    raise ContentDecodingError(e)
+                except ReadTimeoutError as e:
+                    raise ConnectionError(e)
+                except SSLError as e:
+                    raise RequestsSSLError(e)
+            else:
+                # Standard file-like object.
+                while True:
+                    chunk = self.raw.read(chunk_size)
+                    if not chunk:
+                        break
+                    yield chunk
+
+            self._content_consumed = True
+
+        if self._content_consumed and isinstance(self._content, bool):
+            raise StreamConsumedError()
+        elif chunk_size is not None and not isinstance(chunk_size, int):
+            raise TypeError(
+                f"chunk_size must be an int, it is instead a {type(chunk_size)}."
+            )
+        # simulate reading small chunks of the content
+        reused_chunks = iter_slices(self._content, chunk_size)
+
+        stream_chunks = generate()
+
+        chunks = reused_chunks if self._content_consumed else stream_chunks
+
+        if decode_unicode:
+            chunks = stream_decode_response_unicode(chunks, self)
+
+        return chunks
+
+    def iter_lines(
+        self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None
+    ):
+        """Iterates over the response data, one line at a time.  When
+        stream=True is set on the request, this avoids reading the
+        content at once into memory for large responses.
+
+        .. note:: This method is not reentrant safe.
+        """
+
+        pending = None
+
+        for chunk in self.iter_content(
+            chunk_size=chunk_size, decode_unicode=decode_unicode
+        ):
+
+            if pending is not None:
+                chunk = pending + chunk
+
+            if delimiter:
+                lines = chunk.split(delimiter)
+            else:
+                lines = chunk.splitlines()
+
+            if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
+                pending = lines.pop()
+            else:
+                pending = None
+
+            yield from lines
+
+        if pending is not None:
+            yield pending
+
+    @property
+    def content(self):
+        """Content of the response, in bytes."""
+
+        if self._content is False:
+            # Read the contents.
+            if self._content_consumed:
+                raise RuntimeError("The content for this response was already consumed")
+
+            if self.status_code == 0 or self.raw is None:
+                self._content = None
+            else:
+                self._content = b"".join(self.iter_content(CONTENT_CHUNK_SIZE)) or b""
+
+        self._content_consumed = True
+        # don't need to release the connection; that's been handled by urllib3
+        # since we exhausted the data.
+        return self._content
+
+    @property
+    def text(self):
+        """Content of the response, in unicode.
+
+        If Response.encoding is None, encoding will be guessed using
+        ``charset_normalizer`` or ``chardet``.
+
+        The encoding of the response content is determined based solely on HTTP
+        headers, following RFC 2616 to the letter. If you can take advantage of
+        non-HTTP knowledge to make a better guess at the encoding, you should
+        set ``r.encoding`` appropriately before accessing this property.
+        """
+
+        # Try charset from content-type
+        content = None
+        encoding = self.encoding
+
+        if not self.content:
+            return ""
+
+        # Fallback to auto-detected encoding.
+        if self.encoding is None:
+            encoding = self.apparent_encoding
+
+        # Decode unicode from given encoding.
+        try:
+            content = str(self.content, encoding, errors="replace")
+        except (LookupError, TypeError):
+            # A LookupError is raised if the encoding was not found which could
+            # indicate a misspelling or similar mistake.
+            #
+            # A TypeError can be raised if encoding is None
+            #
+            # So we try blindly encoding.
+            content = str(self.content, errors="replace")
+
+        return content
+
+    def json(self, **kwargs):
+        r"""Returns the json-encoded content of a response, if any.
+
+        :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
+        :raises requests.exceptions.JSONDecodeError: If the response body does not
+            contain valid json.
+        """
+
+        if not self.encoding and self.content and len(self.content) > 3:
+            # No encoding set. JSON RFC 4627 section 3 states we should expect
+            # UTF-8, -16 or -32. Detect which one to use; If the detection or
+            # decoding fails, fall back to `self.text` (using charset_normalizer to make
+            # a best guess).
+            encoding = guess_json_utf(self.content)
+            if encoding is not None:
+                try:
+                    return complexjson.loads(self.content.decode(encoding), **kwargs)
+                except UnicodeDecodeError:
+                    # Wrong UTF codec detected; usually because it's not UTF-8
+                    # but some other 8-bit codec.  This is an RFC violation,
+                    # and the server didn't bother to tell us what codec *was*
+                    # used.
+                    pass
+                except JSONDecodeError as e:
+                    raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
+
+        try:
+            return complexjson.loads(self.text, **kwargs)
+        except JSONDecodeError as e:
+            # Catch JSON-related errors and raise as requests.JSONDecodeError
+            # This aliases json.JSONDecodeError and simplejson.JSONDecodeError
+            raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
+
+    @property
+    def links(self):
+        """Returns the parsed header links of the response, if any."""
+
+        header = self.headers.get("link")
+
+        resolved_links = {}
+
+        if header:
+            links = parse_header_links(header)
+
+            for link in links:
+                key = link.get("rel") or link.get("url")
+                resolved_links[key] = link
+
+        return resolved_links
+
+    def raise_for_status(self):
+        """Raises :class:`HTTPError`, if one occurred."""
+
+        http_error_msg = ""
+        if isinstance(self.reason, bytes):
+            # We attempt to decode utf-8 first because some servers
+            # choose to localize their reason strings. If the string
+            # isn't utf-8, we fall back to iso-8859-1 for all other
+            # encodings. (See PR #3538)
+            try:
+                reason = self.reason.decode("utf-8")
+            except UnicodeDecodeError:
+                reason = self.reason.decode("iso-8859-1")
+        else:
+            reason = self.reason
+
+        if 400 <= self.status_code < 500:
+            http_error_msg = (
+                f"{self.status_code} Client Error: {reason} for url: {self.url}"
+            )
+
+        elif 500 <= self.status_code < 600:
+            http_error_msg = (
+                f"{self.status_code} Server Error: {reason} for url: {self.url}"
+            )
+
+        if http_error_msg:
+            raise HTTPError(http_error_msg, response=self)
+
+    def close(self):
+        """Releases the connection back to the pool. Once this method has been
+        called the underlying ``raw`` object must not be accessed again.
+
+        *Note: Should not normally need to be called explicitly.*
+        """
+        if not self._content_consumed:
+            self.raw.close()
+
+        release_conn = getattr(self.raw, "release_conn", None)
+        if release_conn is not None:
+            release_conn()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/packages.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/packages.py
new file mode 100644
index 0000000..9582fa7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/packages.py
@@ -0,0 +1,16 @@
+import sys
+
+# This code exists for backwards compatibility reasons.
+# I don't like it either. Just look the other way. :)
+
+for package in ('urllib3', 'idna', 'chardet'):
+    vendored_package = "pip._vendor." + package
+    locals()[package] = __import__(vendored_package)
+    # This traversal is apparently necessary such that the identities are
+    # preserved (requests.packages.urllib3.* is urllib3.*)
+    for mod in list(sys.modules):
+        if mod == vendored_package or mod.startswith(vendored_package + '.'):
+            unprefixed_mod = mod[len("pip._vendor."):]
+            sys.modules['pip._vendor.requests.packages.' + unprefixed_mod] = sys.modules[mod]
+
+# Kinda cool, though, right?
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py
new file mode 100644
index 0000000..6cb3b4d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/sessions.py
@@ -0,0 +1,831 @@
+"""
+requests.sessions
+~~~~~~~~~~~~~~~~~
+
+This module provides a Session object to manage and persist settings across
+requests (cookies, auth, proxies).
+"""
+import os
+import sys
+import time
+from collections import OrderedDict
+from datetime import timedelta
+
+from ._internal_utils import to_native_string
+from .adapters import HTTPAdapter
+from .auth import _basic_auth_str
+from .compat import Mapping, cookielib, urljoin, urlparse
+from .cookies import (
+    RequestsCookieJar,
+    cookiejar_from_dict,
+    extract_cookies_to_jar,
+    merge_cookies,
+)
+from .exceptions import (
+    ChunkedEncodingError,
+    ContentDecodingError,
+    InvalidSchema,
+    TooManyRedirects,
+)
+from .hooks import default_hooks, dispatch_hook
+
+# formerly defined here, reexposed here for backward compatibility
+from .models import (  # noqa: F401
+    DEFAULT_REDIRECT_LIMIT,
+    REDIRECT_STATI,
+    PreparedRequest,
+    Request,
+)
+from .status_codes import codes
+from .structures import CaseInsensitiveDict
+from .utils import (  # noqa: F401
+    DEFAULT_PORTS,
+    default_headers,
+    get_auth_from_url,
+    get_environ_proxies,
+    get_netrc_auth,
+    requote_uri,
+    resolve_proxies,
+    rewind_body,
+    should_bypass_proxies,
+    to_key_val_list,
+)
+
+# Preferred clock, based on which one is more accurate on a given system.
+if sys.platform == "win32":
+    preferred_clock = time.perf_counter
+else:
+    preferred_clock = time.time
+
+
+def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
+    """Determines appropriate setting for a given request, taking into account
+    the explicit setting on that request, and the setting in the session. If a
+    setting is a dictionary, they will be merged together using `dict_class`
+    """
+
+    if session_setting is None:
+        return request_setting
+
+    if request_setting is None:
+        return session_setting
+
+    # Bypass if not a dictionary (e.g. verify)
+    if not (
+        isinstance(session_setting, Mapping) and isinstance(request_setting, Mapping)
+    ):
+        return request_setting
+
+    merged_setting = dict_class(to_key_val_list(session_setting))
+    merged_setting.update(to_key_val_list(request_setting))
+
+    # Remove keys that are set to None. Extract keys first to avoid altering
+    # the dictionary during iteration.
+    none_keys = [k for (k, v) in merged_setting.items() if v is None]
+    for key in none_keys:
+        del merged_setting[key]
+
+    return merged_setting
+
+
+def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
+    """Properly merges both requests and session hooks.
+
+    This is necessary because when request_hooks == {'response': []}, the
+    merge breaks Session hooks entirely.
+    """
+    if session_hooks is None or session_hooks.get("response") == []:
+        return request_hooks
+
+    if request_hooks is None or request_hooks.get("response") == []:
+        return session_hooks
+
+    return merge_setting(request_hooks, session_hooks, dict_class)
+
+
+class SessionRedirectMixin:
+    def get_redirect_target(self, resp):
+        """Receives a Response. Returns a redirect URI or ``None``"""
+        # Due to the nature of how requests processes redirects this method will
+        # be called at least once upon the original response and at least twice
+        # on each subsequent redirect response (if any).
+        # If a custom mixin is used to handle this logic, it may be advantageous
+        # to cache the redirect location onto the response object as a private
+        # attribute.
+        if resp.is_redirect:
+            location = resp.headers["location"]
+            # Currently the underlying http module on py3 decode headers
+            # in latin1, but empirical evidence suggests that latin1 is very
+            # rarely used with non-ASCII characters in HTTP headers.
+            # It is more likely to get UTF8 header rather than latin1.
+            # This causes incorrect handling of UTF8 encoded location headers.
+            # To solve this, we re-encode the location in latin1.
+            location = location.encode("latin1")
+            return to_native_string(location, "utf8")
+        return None
+
+    def should_strip_auth(self, old_url, new_url):
+        """Decide whether Authorization header should be removed when redirecting"""
+        old_parsed = urlparse(old_url)
+        new_parsed = urlparse(new_url)
+        if old_parsed.hostname != new_parsed.hostname:
+            return True
+        # Special case: allow http -> https redirect when using the standard
+        # ports. This isn't specified by RFC 7235, but is kept to avoid
+        # breaking backwards compatibility with older versions of requests
+        # that allowed any redirects on the same host.
+        if (
+            old_parsed.scheme == "http"
+            and old_parsed.port in (80, None)
+            and new_parsed.scheme == "https"
+            and new_parsed.port in (443, None)
+        ):
+            return False
+
+        # Handle default port usage corresponding to scheme.
+        changed_port = old_parsed.port != new_parsed.port
+        changed_scheme = old_parsed.scheme != new_parsed.scheme
+        default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
+        if (
+            not changed_scheme
+            and old_parsed.port in default_port
+            and new_parsed.port in default_port
+        ):
+            return False
+
+        # Standard case: root URI must match
+        return changed_port or changed_scheme
+
+    def resolve_redirects(
+        self,
+        resp,
+        req,
+        stream=False,
+        timeout=None,
+        verify=True,
+        cert=None,
+        proxies=None,
+        yield_requests=False,
+        **adapter_kwargs,
+    ):
+        """Receives a Response. Returns a generator of Responses or Requests."""
+
+        hist = []  # keep track of history
+
+        url = self.get_redirect_target(resp)
+        previous_fragment = urlparse(req.url).fragment
+        while url:
+            prepared_request = req.copy()
+
+            # Update history and keep track of redirects.
+            # resp.history must ignore the original request in this loop
+            hist.append(resp)
+            resp.history = hist[1:]
+
+            try:
+                resp.content  # Consume socket so it can be released
+            except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
+                resp.raw.read(decode_content=False)
+
+            if len(resp.history) >= self.max_redirects:
+                raise TooManyRedirects(
+                    f"Exceeded {self.max_redirects} redirects.", response=resp
+                )
+
+            # Release the connection back into the pool.
+            resp.close()
+
+            # Handle redirection without scheme (see: RFC 1808 Section 4)
+            if url.startswith("//"):
+                parsed_rurl = urlparse(resp.url)
+                url = ":".join([to_native_string(parsed_rurl.scheme), url])
+
+            # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
+            parsed = urlparse(url)
+            if parsed.fragment == "" and previous_fragment:
+                parsed = parsed._replace(fragment=previous_fragment)
+            elif parsed.fragment:
+                previous_fragment = parsed.fragment
+            url = parsed.geturl()
+
+            # Facilitate relative 'location' headers, as allowed by RFC 7231.
+            # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
+            # Compliant with RFC3986, we percent encode the url.
+            if not parsed.netloc:
+                url = urljoin(resp.url, requote_uri(url))
+            else:
+                url = requote_uri(url)
+
+            prepared_request.url = to_native_string(url)
+
+            self.rebuild_method(prepared_request, resp)
+
+            # https://github.com/psf/requests/issues/1084
+            if resp.status_code not in (
+                codes.temporary_redirect,
+                codes.permanent_redirect,
+            ):
+                # https://github.com/psf/requests/issues/3490
+                purged_headers = ("Content-Length", "Content-Type", "Transfer-Encoding")
+                for header in purged_headers:
+                    prepared_request.headers.pop(header, None)
+                prepared_request.body = None
+
+            headers = prepared_request.headers
+            headers.pop("Cookie", None)
+
+            # Extract any cookies sent on the response to the cookiejar
+            # in the new request. Because we've mutated our copied prepared
+            # request, use the old one that we haven't yet touched.
+            extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
+            merge_cookies(prepared_request._cookies, self.cookies)
+            prepared_request.prepare_cookies(prepared_request._cookies)
+
+            # Rebuild auth and proxy information.
+            proxies = self.rebuild_proxies(prepared_request, proxies)
+            self.rebuild_auth(prepared_request, resp)
+
+            # A failed tell() sets `_body_position` to `object()`. This non-None
+            # value ensures `rewindable` will be True, allowing us to raise an
+            # UnrewindableBodyError, instead of hanging the connection.
+            rewindable = prepared_request._body_position is not None and (
+                "Content-Length" in headers or "Transfer-Encoding" in headers
+            )
+
+            # Attempt to rewind consumed file-like object.
+            if rewindable:
+                rewind_body(prepared_request)
+
+            # Override the original request.
+            req = prepared_request
+
+            if yield_requests:
+                yield req
+            else:
+
+                resp = self.send(
+                    req,
+                    stream=stream,
+                    timeout=timeout,
+                    verify=verify,
+                    cert=cert,
+                    proxies=proxies,
+                    allow_redirects=False,
+                    **adapter_kwargs,
+                )
+
+                extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
+
+                # extract redirect url, if any, for the next loop
+                url = self.get_redirect_target(resp)
+                yield resp
+
+    def rebuild_auth(self, prepared_request, response):
+        """When being redirected we may want to strip authentication from the
+        request to avoid leaking credentials. This method intelligently removes
+        and reapplies authentication where possible to avoid credential loss.
+        """
+        headers = prepared_request.headers
+        url = prepared_request.url
+
+        if "Authorization" in headers and self.should_strip_auth(
+            response.request.url, url
+        ):
+            # If we get redirected to a new host, we should strip out any
+            # authentication headers.
+            del headers["Authorization"]
+
+        # .netrc might have more auth for us on our new host.
+        new_auth = get_netrc_auth(url) if self.trust_env else None
+        if new_auth is not None:
+            prepared_request.prepare_auth(new_auth)
+
+    def rebuild_proxies(self, prepared_request, proxies):
+        """This method re-evaluates the proxy configuration by considering the
+        environment variables. If we are redirected to a URL covered by
+        NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
+        proxy keys for this URL (in case they were stripped by a previous
+        redirect).
+
+        This method also replaces the Proxy-Authorization header where
+        necessary.
+
+        :rtype: dict
+        """
+        headers = prepared_request.headers
+        scheme = urlparse(prepared_request.url).scheme
+        new_proxies = resolve_proxies(prepared_request, proxies, self.trust_env)
+
+        if "Proxy-Authorization" in headers:
+            del headers["Proxy-Authorization"]
+
+        try:
+            username, password = get_auth_from_url(new_proxies[scheme])
+        except KeyError:
+            username, password = None, None
+
+        if username and password:
+            headers["Proxy-Authorization"] = _basic_auth_str(username, password)
+
+        return new_proxies
+
+    def rebuild_method(self, prepared_request, response):
+        """When being redirected we may want to change the method of the request
+        based on certain specs or browser behavior.
+        """
+        method = prepared_request.method
+
+        # https://tools.ietf.org/html/rfc7231#section-6.4.4
+        if response.status_code == codes.see_other and method != "HEAD":
+            method = "GET"
+
+        # Do what the browsers do, despite standards...
+        # First, turn 302s into GETs.
+        if response.status_code == codes.found and method != "HEAD":
+            method = "GET"
+
+        # Second, if a POST is responded to with a 301, turn it into a GET.
+        # This bizarre behaviour is explained in Issue 1704.
+        if response.status_code == codes.moved and method == "POST":
+            method = "GET"
+
+        prepared_request.method = method
+
+
+class Session(SessionRedirectMixin):
+    """A Requests session.
+
+    Provides cookie persistence, connection-pooling, and configuration.
+
+    Basic Usage::
+
+      >>> import requests
+      >>> s = requests.Session()
+      >>> s.get('https://httpbin.org/get')
+      <Response [200]>
+
+    Or as a context manager::
+
+      >>> with requests.Session() as s:
+      ...     s.get('https://httpbin.org/get')
+      <Response [200]>
+    """
+
+    __attrs__ = [
+        "headers",
+        "cookies",
+        "auth",
+        "proxies",
+        "hooks",
+        "params",
+        "verify",
+        "cert",
+        "adapters",
+        "stream",
+        "trust_env",
+        "max_redirects",
+    ]
+
+    def __init__(self):
+
+        #: A case-insensitive dictionary of headers to be sent on each
+        #: :class:`Request <Request>` sent from this
+        #: :class:`Session <Session>`.
+        self.headers = default_headers()
+
+        #: Default Authentication tuple or object to attach to
+        #: :class:`Request <Request>`.
+        self.auth = None
+
+        #: Dictionary mapping protocol or protocol and host to the URL of the proxy
+        #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
+        #: be used on each :class:`Request <Request>`.
+        self.proxies = {}
+
+        #: Event-handling hooks.
+        self.hooks = default_hooks()
+
+        #: Dictionary of querystring data to attach to each
+        #: :class:`Request <Request>`. The dictionary values may be lists for
+        #: representing multivalued query parameters.
+        self.params = {}
+
+        #: Stream response content default.
+        self.stream = False
+
+        #: SSL Verification default.
+        #: Defaults to `True`, requiring requests to verify the TLS certificate at the
+        #: remote end.
+        #: If verify is set to `False`, requests will accept any TLS certificate
+        #: presented by the server, and will ignore hostname mismatches and/or
+        #: expired certificates, which will make your application vulnerable to
+        #: man-in-the-middle (MitM) attacks.
+        #: Only set this to `False` for testing.
+        self.verify = True
+
+        #: SSL client certificate default, if String, path to ssl client
+        #: cert file (.pem). If Tuple, ('cert', 'key') pair.
+        self.cert = None
+
+        #: Maximum number of redirects allowed. If the request exceeds this
+        #: limit, a :class:`TooManyRedirects` exception is raised.
+        #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
+        #: 30.
+        self.max_redirects = DEFAULT_REDIRECT_LIMIT
+
+        #: Trust environment settings for proxy configuration, default
+        #: authentication and similar.
+        self.trust_env = True
+
+        #: A CookieJar containing all currently outstanding cookies set on this
+        #: session. By default it is a
+        #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
+        #: may be any other ``cookielib.CookieJar`` compatible object.
+        self.cookies = cookiejar_from_dict({})
+
+        # Default connection adapters.
+        self.adapters = OrderedDict()
+        self.mount("https://", HTTPAdapter())
+        self.mount("http://", HTTPAdapter())
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *args):
+        self.close()
+
+    def prepare_request(self, request):
+        """Constructs a :class:`PreparedRequest <PreparedRequest>` for
+        transmission and returns it. The :class:`PreparedRequest` has settings
+        merged from the :class:`Request <Request>` instance and those of the
+        :class:`Session`.
+
+        :param request: :class:`Request` instance to prepare with this
+            session's settings.
+        :rtype: requests.PreparedRequest
+        """
+        cookies = request.cookies or {}
+
+        # Bootstrap CookieJar.
+        if not isinstance(cookies, cookielib.CookieJar):
+            cookies = cookiejar_from_dict(cookies)
+
+        # Merge with session cookies
+        merged_cookies = merge_cookies(
+            merge_cookies(RequestsCookieJar(), self.cookies), cookies
+        )
+
+        # Set environment's basic authentication if not explicitly set.
+        auth = request.auth
+        if self.trust_env and not auth and not self.auth:
+            auth = get_netrc_auth(request.url)
+
+        p = PreparedRequest()
+        p.prepare(
+            method=request.method.upper(),
+            url=request.url,
+            files=request.files,
+            data=request.data,
+            json=request.json,
+            headers=merge_setting(
+                request.headers, self.headers, dict_class=CaseInsensitiveDict
+            ),
+            params=merge_setting(request.params, self.params),
+            auth=merge_setting(auth, self.auth),
+            cookies=merged_cookies,
+            hooks=merge_hooks(request.hooks, self.hooks),
+        )
+        return p
+
+    def request(
+        self,
+        method,
+        url,
+        params=None,
+        data=None,
+        headers=None,
+        cookies=None,
+        files=None,
+        auth=None,
+        timeout=None,
+        allow_redirects=True,
+        proxies=None,
+        hooks=None,
+        stream=None,
+        verify=None,
+        cert=None,
+        json=None,
+    ):
+        """Constructs a :class:`Request <Request>`, prepares it and sends it.
+        Returns :class:`Response <Response>` object.
+
+        :param method: method for the new :class:`Request` object.
+        :param url: URL for the new :class:`Request` object.
+        :param params: (optional) Dictionary or bytes to be sent in the query
+            string for the :class:`Request`.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the
+            :class:`Request`.
+        :param headers: (optional) Dictionary of HTTP Headers to send with the
+            :class:`Request`.
+        :param cookies: (optional) Dict or CookieJar object to send with the
+            :class:`Request`.
+        :param files: (optional) Dictionary of ``'filename': file-like-objects``
+            for multipart encoding upload.
+        :param auth: (optional) Auth tuple or callable to enable
+            Basic/Digest/Custom HTTP Auth.
+        :param timeout: (optional) How long to wait for the server to send
+            data before giving up, as a float, or a :ref:`(connect timeout,
+            read timeout) <timeouts>` tuple.
+        :type timeout: float or tuple
+        :param allow_redirects: (optional) Set to True by default.
+        :type allow_redirects: bool
+        :param proxies: (optional) Dictionary mapping protocol or protocol and
+            hostname to the URL of the proxy.
+        :param stream: (optional) whether to immediately download the response
+            content. Defaults to ``False``.
+        :param verify: (optional) Either a boolean, in which case it controls whether we verify
+            the server's TLS certificate, or a string, in which case it must be a path
+            to a CA bundle to use. Defaults to ``True``. When set to
+            ``False``, requests will accept any TLS certificate presented by
+            the server, and will ignore hostname mismatches and/or expired
+            certificates, which will make your application vulnerable to
+            man-in-the-middle (MitM) attacks. Setting verify to ``False``
+            may be useful during local development or testing.
+        :param cert: (optional) if String, path to ssl client cert file (.pem).
+            If Tuple, ('cert', 'key') pair.
+        :rtype: requests.Response
+        """
+        # Create the Request.
+        req = Request(
+            method=method.upper(),
+            url=url,
+            headers=headers,
+            files=files,
+            data=data or {},
+            json=json,
+            params=params or {},
+            auth=auth,
+            cookies=cookies,
+            hooks=hooks,
+        )
+        prep = self.prepare_request(req)
+
+        proxies = proxies or {}
+
+        settings = self.merge_environment_settings(
+            prep.url, proxies, stream, verify, cert
+        )
+
+        # Send the request.
+        send_kwargs = {
+            "timeout": timeout,
+            "allow_redirects": allow_redirects,
+        }
+        send_kwargs.update(settings)
+        resp = self.send(prep, **send_kwargs)
+
+        return resp
+
+    def get(self, url, **kwargs):
+        r"""Sends a GET request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault("allow_redirects", True)
+        return self.request("GET", url, **kwargs)
+
+    def options(self, url, **kwargs):
+        r"""Sends a OPTIONS request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault("allow_redirects", True)
+        return self.request("OPTIONS", url, **kwargs)
+
+    def head(self, url, **kwargs):
+        r"""Sends a HEAD request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        kwargs.setdefault("allow_redirects", False)
+        return self.request("HEAD", url, **kwargs)
+
+    def post(self, url, data=None, json=None, **kwargs):
+        r"""Sends a POST request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param json: (optional) json to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request("POST", url, data=data, json=json, **kwargs)
+
+    def put(self, url, data=None, **kwargs):
+        r"""Sends a PUT request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request("PUT", url, data=data, **kwargs)
+
+    def patch(self, url, data=None, **kwargs):
+        r"""Sends a PATCH request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param data: (optional) Dictionary, list of tuples, bytes, or file-like
+            object to send in the body of the :class:`Request`.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request("PATCH", url, data=data, **kwargs)
+
+    def delete(self, url, **kwargs):
+        r"""Sends a DELETE request. Returns :class:`Response` object.
+
+        :param url: URL for the new :class:`Request` object.
+        :param \*\*kwargs: Optional arguments that ``request`` takes.
+        :rtype: requests.Response
+        """
+
+        return self.request("DELETE", url, **kwargs)
+
+    def send(self, request, **kwargs):
+        """Send a given PreparedRequest.
+
+        :rtype: requests.Response
+        """
+        # Set defaults that the hooks can utilize to ensure they always have
+        # the correct parameters to reproduce the previous request.
+        kwargs.setdefault("stream", self.stream)
+        kwargs.setdefault("verify", self.verify)
+        kwargs.setdefault("cert", self.cert)
+        if "proxies" not in kwargs:
+            kwargs["proxies"] = resolve_proxies(request, self.proxies, self.trust_env)
+
+        # It's possible that users might accidentally send a Request object.
+        # Guard against that specific failure case.
+        if isinstance(request, Request):
+            raise ValueError("You can only send PreparedRequests.")
+
+        # Set up variables needed for resolve_redirects and dispatching of hooks
+        allow_redirects = kwargs.pop("allow_redirects", True)
+        stream = kwargs.get("stream")
+        hooks = request.hooks
+
+        # Get the appropriate adapter to use
+        adapter = self.get_adapter(url=request.url)
+
+        # Start time (approximately) of the request
+        start = preferred_clock()
+
+        # Send the request
+        r = adapter.send(request, **kwargs)
+
+        # Total elapsed time of the request (approximately)
+        elapsed = preferred_clock() - start
+        r.elapsed = timedelta(seconds=elapsed)
+
+        # Response manipulation hooks
+        r = dispatch_hook("response", hooks, r, **kwargs)
+
+        # Persist cookies
+        if r.history:
+
+            # If the hooks create history then we want those cookies too
+            for resp in r.history:
+                extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
+
+        extract_cookies_to_jar(self.cookies, request, r.raw)
+
+        # Resolve redirects if allowed.
+        if allow_redirects:
+            # Redirect resolving generator.
+            gen = self.resolve_redirects(r, request, **kwargs)
+            history = [resp for resp in gen]
+        else:
+            history = []
+
+        # Shuffle things around if there's history.
+        if history:
+            # Insert the first (original) request at the start
+            history.insert(0, r)
+            # Get the last request made
+            r = history.pop()
+            r.history = history
+
+        # If redirects aren't being followed, store the response on the Request for Response.next().
+        if not allow_redirects:
+            try:
+                r._next = next(
+                    self.resolve_redirects(r, request, yield_requests=True, **kwargs)
+                )
+            except StopIteration:
+                pass
+
+        if not stream:
+            r.content
+
+        return r
+
+    def merge_environment_settings(self, url, proxies, stream, verify, cert):
+        """
+        Check the environment and merge it with some settings.
+
+        :rtype: dict
+        """
+        # Gather clues from the surrounding environment.
+        if self.trust_env:
+            # Set environment's proxies.
+            no_proxy = proxies.get("no_proxy") if proxies is not None else None
+            env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+            for (k, v) in env_proxies.items():
+                proxies.setdefault(k, v)
+
+            # Look for requests environment configuration
+            # and be compatible with cURL.
+            if verify is True or verify is None:
+                verify = (
+                    os.environ.get("REQUESTS_CA_BUNDLE")
+                    or os.environ.get("CURL_CA_BUNDLE")
+                    or verify
+                )
+
+        # Merge all the kwargs.
+        proxies = merge_setting(proxies, self.proxies)
+        stream = merge_setting(stream, self.stream)
+        verify = merge_setting(verify, self.verify)
+        cert = merge_setting(cert, self.cert)
+
+        return {"proxies": proxies, "stream": stream, "verify": verify, "cert": cert}
+
+    def get_adapter(self, url):
+        """
+        Returns the appropriate connection adapter for the given URL.
+
+        :rtype: requests.adapters.BaseAdapter
+        """
+        for (prefix, adapter) in self.adapters.items():
+
+            if url.lower().startswith(prefix.lower()):
+                return adapter
+
+        # Nothing matches :-/
+        raise InvalidSchema(f"No connection adapters were found for {url!r}")
+
+    def close(self):
+        """Closes all adapters and as such the session"""
+        for v in self.adapters.values():
+            v.close()
+
+    def mount(self, prefix, adapter):
+        """Registers a connection adapter to a prefix.
+
+        Adapters are sorted in descending order by prefix length.
+        """
+        self.adapters[prefix] = adapter
+        keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
+
+        for key in keys_to_move:
+            self.adapters[key] = self.adapters.pop(key)
+
+    def __getstate__(self):
+        state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
+        return state
+
+    def __setstate__(self, state):
+        for attr, value in state.items():
+            setattr(self, attr, value)
+
+
+def session():
+    """
+    Returns a :class:`Session` for context-management.
+
+    .. deprecated:: 1.0.0
+
+        This method has been deprecated since version 1.0.0 and is only kept for
+        backwards compatibility. New code should use :class:`~requests.sessions.Session`
+        to create a session. This may be removed at a future date.
+
+    :rtype: Session
+    """
+    return Session()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/status_codes.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/status_codes.py
new file mode 100644
index 0000000..4bd072b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/status_codes.py
@@ -0,0 +1,128 @@
+r"""
+The ``codes`` object defines a mapping from common names for HTTP statuses
+to their numerical codes, accessible either as attributes or as dictionary
+items.
+
+Example::
+
+    >>> import requests
+    >>> requests.codes['temporary_redirect']
+    307
+    >>> requests.codes.teapot
+    418
+    >>> requests.codes['\o/']
+    200
+
+Some codes have multiple names, and both upper- and lower-case versions of
+the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
+``codes.okay`` all correspond to the HTTP status code 200.
+"""
+
+from .structures import LookupDict
+
+_codes = {
+    # Informational.
+    100: ("continue",),
+    101: ("switching_protocols",),
+    102: ("processing",),
+    103: ("checkpoint",),
+    122: ("uri_too_long", "request_uri_too_long"),
+    200: ("ok", "okay", "all_ok", "all_okay", "all_good", "\\o/", "✓"),
+    201: ("created",),
+    202: ("accepted",),
+    203: ("non_authoritative_info", "non_authoritative_information"),
+    204: ("no_content",),
+    205: ("reset_content", "reset"),
+    206: ("partial_content", "partial"),
+    207: ("multi_status", "multiple_status", "multi_stati", "multiple_stati"),
+    208: ("already_reported",),
+    226: ("im_used",),
+    # Redirection.
+    300: ("multiple_choices",),
+    301: ("moved_permanently", "moved", "\\o-"),
+    302: ("found",),
+    303: ("see_other", "other"),
+    304: ("not_modified",),
+    305: ("use_proxy",),
+    306: ("switch_proxy",),
+    307: ("temporary_redirect", "temporary_moved", "temporary"),
+    308: (
+        "permanent_redirect",
+        "resume_incomplete",
+        "resume",
+    ),  # "resume" and "resume_incomplete" to be removed in 3.0
+    # Client Error.
+    400: ("bad_request", "bad"),
+    401: ("unauthorized",),
+    402: ("payment_required", "payment"),
+    403: ("forbidden",),
+    404: ("not_found", "-o-"),
+    405: ("method_not_allowed", "not_allowed"),
+    406: ("not_acceptable",),
+    407: ("proxy_authentication_required", "proxy_auth", "proxy_authentication"),
+    408: ("request_timeout", "timeout"),
+    409: ("conflict",),
+    410: ("gone",),
+    411: ("length_required",),
+    412: ("precondition_failed", "precondition"),
+    413: ("request_entity_too_large",),
+    414: ("request_uri_too_large",),
+    415: ("unsupported_media_type", "unsupported_media", "media_type"),
+    416: (
+        "requested_range_not_satisfiable",
+        "requested_range",
+        "range_not_satisfiable",
+    ),
+    417: ("expectation_failed",),
+    418: ("im_a_teapot", "teapot", "i_am_a_teapot"),
+    421: ("misdirected_request",),
+    422: ("unprocessable_entity", "unprocessable"),
+    423: ("locked",),
+    424: ("failed_dependency", "dependency"),
+    425: ("unordered_collection", "unordered"),
+    426: ("upgrade_required", "upgrade"),
+    428: ("precondition_required", "precondition"),
+    429: ("too_many_requests", "too_many"),
+    431: ("header_fields_too_large", "fields_too_large"),
+    444: ("no_response", "none"),
+    449: ("retry_with", "retry"),
+    450: ("blocked_by_windows_parental_controls", "parental_controls"),
+    451: ("unavailable_for_legal_reasons", "legal_reasons"),
+    499: ("client_closed_request",),
+    # Server Error.
+    500: ("internal_server_error", "server_error", "/o\\", "✗"),
+    501: ("not_implemented",),
+    502: ("bad_gateway",),
+    503: ("service_unavailable", "unavailable"),
+    504: ("gateway_timeout",),
+    505: ("http_version_not_supported", "http_version"),
+    506: ("variant_also_negotiates",),
+    507: ("insufficient_storage",),
+    509: ("bandwidth_limit_exceeded", "bandwidth"),
+    510: ("not_extended",),
+    511: ("network_authentication_required", "network_auth", "network_authentication"),
+}
+
+codes = LookupDict(name="status_codes")
+
+
+def _init():
+    for code, titles in _codes.items():
+        for title in titles:
+            setattr(codes, title, code)
+            if not title.startswith(("\\", "/")):
+                setattr(codes, title.upper(), code)
+
+    def doc(code):
+        names = ", ".join(f"``{n}``" for n in _codes[code])
+        return "* %d: %s" % (code, names)
+
+    global __doc__
+    __doc__ = (
+        __doc__ + "\n" + "\n".join(doc(code) for code in sorted(_codes))
+        if __doc__ is not None
+        else None
+    )
+
+
+_init()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/structures.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/structures.py
new file mode 100644
index 0000000..188e13e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/structures.py
@@ -0,0 +1,99 @@
+"""
+requests.structures
+~~~~~~~~~~~~~~~~~~~
+
+Data structures that power Requests.
+"""
+
+from collections import OrderedDict
+
+from .compat import Mapping, MutableMapping
+
+
+class CaseInsensitiveDict(MutableMapping):
+    """A case-insensitive ``dict``-like object.
+
+    Implements all methods and operations of
+    ``MutableMapping`` as well as dict's ``copy``. Also
+    provides ``lower_items``.
+
+    All keys are expected to be strings. The structure remembers the
+    case of the last key to be set, and ``iter(instance)``,
+    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
+    will contain case-sensitive keys. However, querying and contains
+    testing is case insensitive::
+
+        cid = CaseInsensitiveDict()
+        cid['Accept'] = 'application/json'
+        cid['aCCEPT'] == 'application/json'  # True
+        list(cid) == ['Accept']  # True
+
+    For example, ``headers['content-encoding']`` will return the
+    value of a ``'Content-Encoding'`` response header, regardless
+    of how the header name was originally stored.
+
+    If the constructor, ``.update``, or equality comparison
+    operations are given keys that have equal ``.lower()``s, the
+    behavior is undefined.
+    """
+
+    def __init__(self, data=None, **kwargs):
+        self._store = OrderedDict()
+        if data is None:
+            data = {}
+        self.update(data, **kwargs)
+
+    def __setitem__(self, key, value):
+        # Use the lowercased key for lookups, but store the actual
+        # key alongside the value.
+        self._store[key.lower()] = (key, value)
+
+    def __getitem__(self, key):
+        return self._store[key.lower()][1]
+
+    def __delitem__(self, key):
+        del self._store[key.lower()]
+
+    def __iter__(self):
+        return (casedkey for casedkey, mappedvalue in self._store.values())
+
+    def __len__(self):
+        return len(self._store)
+
+    def lower_items(self):
+        """Like iteritems(), but with all lowercase keys."""
+        return ((lowerkey, keyval[1]) for (lowerkey, keyval) in self._store.items())
+
+    def __eq__(self, other):
+        if isinstance(other, Mapping):
+            other = CaseInsensitiveDict(other)
+        else:
+            return NotImplemented
+        # Compare insensitively
+        return dict(self.lower_items()) == dict(other.lower_items())
+
+    # Copy is required
+    def copy(self):
+        return CaseInsensitiveDict(self._store.values())
+
+    def __repr__(self):
+        return str(dict(self.items()))
+
+
+class LookupDict(dict):
+    """Dictionary lookup object."""
+
+    def __init__(self, name=None):
+        self.name = name
+        super().__init__()
+
+    def __repr__(self):
+        return f"<lookup '{self.name}'>"
+
+    def __getitem__(self, key):
+        # We allow fall-through here, so values default to None
+
+        return self.__dict__.get(key, None)
+
+    def get(self, key, default=None):
+        return self.__dict__.get(key, default)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/requests/utils.py b/venv/lib/python3.9/site-packages/pip/_vendor/requests/utils.py
new file mode 100644
index 0000000..33f394d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/requests/utils.py
@@ -0,0 +1,1086 @@
+"""
+requests.utils
+~~~~~~~~~~~~~~
+
+This module provides utility functions that are used within Requests
+that are also useful for external consumption.
+"""
+
+import codecs
+import contextlib
+import io
+import os
+import re
+import socket
+import struct
+import sys
+import tempfile
+import warnings
+import zipfile
+from collections import OrderedDict
+
+from pip._vendor.urllib3.util import make_headers, parse_url
+
+from . import certs
+from .__version__ import __version__
+
+# to_native_string is unused here, but imported here for backwards compatibility
+from ._internal_utils import HEADER_VALIDATORS, to_native_string  # noqa: F401
+from .compat import (
+    Mapping,
+    basestring,
+    bytes,
+    getproxies,
+    getproxies_environment,
+    integer_types,
+)
+from .compat import parse_http_list as _parse_list_header
+from .compat import (
+    proxy_bypass,
+    proxy_bypass_environment,
+    quote,
+    str,
+    unquote,
+    urlparse,
+    urlunparse,
+)
+from .cookies import cookiejar_from_dict
+from .exceptions import (
+    FileModeWarning,
+    InvalidHeader,
+    InvalidURL,
+    UnrewindableBodyError,
+)
+from .structures import CaseInsensitiveDict
+
+NETRC_FILES = (".netrc", "_netrc")
+
+DEFAULT_CA_BUNDLE_PATH = certs.where()
+
+DEFAULT_PORTS = {"http": 80, "https": 443}
+
+# Ensure that ', ' is used to preserve previous delimiter behavior.
+DEFAULT_ACCEPT_ENCODING = ", ".join(
+    re.split(r",\s*", make_headers(accept_encoding=True)["accept-encoding"])
+)
+
+
+if sys.platform == "win32":
+    # provide a proxy_bypass version on Windows without DNS lookups
+
+    def proxy_bypass_registry(host):
+        try:
+            import winreg
+        except ImportError:
+            return False
+
+        try:
+            internetSettings = winreg.OpenKey(
+                winreg.HKEY_CURRENT_USER,
+                r"Software\Microsoft\Windows\CurrentVersion\Internet Settings",
+            )
+            # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
+            proxyEnable = int(winreg.QueryValueEx(internetSettings, "ProxyEnable")[0])
+            # ProxyOverride is almost always a string
+            proxyOverride = winreg.QueryValueEx(internetSettings, "ProxyOverride")[0]
+        except (OSError, ValueError):
+            return False
+        if not proxyEnable or not proxyOverride:
+            return False
+
+        # make a check value list from the registry entry: replace the
+        # '<local>' string by the localhost entry and the corresponding
+        # canonical entry.
+        proxyOverride = proxyOverride.split(";")
+        # now check if we match one of the registry values.
+        for test in proxyOverride:
+            if test == "<local>":
+                if "." not in host:
+                    return True
+            test = test.replace(".", r"\.")  # mask dots
+            test = test.replace("*", r".*")  # change glob sequence
+            test = test.replace("?", r".")  # change glob char
+            if re.match(test, host, re.I):
+                return True
+        return False
+
+    def proxy_bypass(host):  # noqa
+        """Return True, if the host should be bypassed.
+
+        Checks proxy settings gathered from the environment, if specified,
+        or the registry.
+        """
+        if getproxies_environment():
+            return proxy_bypass_environment(host)
+        else:
+            return proxy_bypass_registry(host)
+
+
+def dict_to_sequence(d):
+    """Returns an internal sequence dictionary update."""
+
+    if hasattr(d, "items"):
+        d = d.items()
+
+    return d
+
+
+def super_len(o):
+    total_length = None
+    current_position = 0
+
+    if hasattr(o, "__len__"):
+        total_length = len(o)
+
+    elif hasattr(o, "len"):
+        total_length = o.len
+
+    elif hasattr(o, "fileno"):
+        try:
+            fileno = o.fileno()
+        except (io.UnsupportedOperation, AttributeError):
+            # AttributeError is a surprising exception, seeing as how we've just checked
+            # that `hasattr(o, 'fileno')`.  It happens for objects obtained via
+            # `Tarfile.extractfile()`, per issue 5229.
+            pass
+        else:
+            total_length = os.fstat(fileno).st_size
+
+            # Having used fstat to determine the file length, we need to
+            # confirm that this file was opened up in binary mode.
+            if "b" not in o.mode:
+                warnings.warn(
+                    (
+                        "Requests has determined the content-length for this "
+                        "request using the binary size of the file: however, the "
+                        "file has been opened in text mode (i.e. without the 'b' "
+                        "flag in the mode). This may lead to an incorrect "
+                        "content-length. In Requests 3.0, support will be removed "
+                        "for files in text mode."
+                    ),
+                    FileModeWarning,
+                )
+
+    if hasattr(o, "tell"):
+        try:
+            current_position = o.tell()
+        except OSError:
+            # This can happen in some weird situations, such as when the file
+            # is actually a special file descriptor like stdin. In this
+            # instance, we don't know what the length is, so set it to zero and
+            # let requests chunk it instead.
+            if total_length is not None:
+                current_position = total_length
+        else:
+            if hasattr(o, "seek") and total_length is None:
+                # StringIO and BytesIO have seek but no usable fileno
+                try:
+                    # seek to end of file
+                    o.seek(0, 2)
+                    total_length = o.tell()
+
+                    # seek back to current position to support
+                    # partially read file-like objects
+                    o.seek(current_position or 0)
+                except OSError:
+                    total_length = 0
+
+    if total_length is None:
+        total_length = 0
+
+    return max(0, total_length - current_position)
+
+
+def get_netrc_auth(url, raise_errors=False):
+    """Returns the Requests tuple auth for a given url from netrc."""
+
+    netrc_file = os.environ.get("NETRC")
+    if netrc_file is not None:
+        netrc_locations = (netrc_file,)
+    else:
+        netrc_locations = (f"~/{f}" for f in NETRC_FILES)
+
+    try:
+        from netrc import NetrcParseError, netrc
+
+        netrc_path = None
+
+        for f in netrc_locations:
+            try:
+                loc = os.path.expanduser(f)
+            except KeyError:
+                # os.path.expanduser can fail when $HOME is undefined and
+                # getpwuid fails. See https://bugs.python.org/issue20164 &
+                # https://github.com/psf/requests/issues/1846
+                return
+
+            if os.path.exists(loc):
+                netrc_path = loc
+                break
+
+        # Abort early if there isn't one.
+        if netrc_path is None:
+            return
+
+        ri = urlparse(url)
+
+        # Strip port numbers from netloc. This weird `if...encode`` dance is
+        # used for Python 3.2, which doesn't support unicode literals.
+        splitstr = b":"
+        if isinstance(url, str):
+            splitstr = splitstr.decode("ascii")
+        host = ri.netloc.split(splitstr)[0]
+
+        try:
+            _netrc = netrc(netrc_path).authenticators(host)
+            if _netrc:
+                # Return with login / password
+                login_i = 0 if _netrc[0] else 1
+                return (_netrc[login_i], _netrc[2])
+        except (NetrcParseError, OSError):
+            # If there was a parsing error or a permissions issue reading the file,
+            # we'll just skip netrc auth unless explicitly asked to raise errors.
+            if raise_errors:
+                raise
+
+    # App Engine hackiness.
+    except (ImportError, AttributeError):
+        pass
+
+
+def guess_filename(obj):
+    """Tries to guess the filename of the given object."""
+    name = getattr(obj, "name", None)
+    if name and isinstance(name, basestring) and name[0] != "<" and name[-1] != ">":
+        return os.path.basename(name)
+
+
+def extract_zipped_paths(path):
+    """Replace nonexistent paths that look like they refer to a member of a zip
+    archive with the location of an extracted copy of the target, or else
+    just return the provided path unchanged.
+    """
+    if os.path.exists(path):
+        # this is already a valid path, no need to do anything further
+        return path
+
+    # find the first valid part of the provided path and treat that as a zip archive
+    # assume the rest of the path is the name of a member in the archive
+    archive, member = os.path.split(path)
+    while archive and not os.path.exists(archive):
+        archive, prefix = os.path.split(archive)
+        if not prefix:
+            # If we don't check for an empty prefix after the split (in other words, archive remains unchanged after the split),
+            # we _can_ end up in an infinite loop on a rare corner case affecting a small number of users
+            break
+        member = "/".join([prefix, member])
+
+    if not zipfile.is_zipfile(archive):
+        return path
+
+    zip_file = zipfile.ZipFile(archive)
+    if member not in zip_file.namelist():
+        return path
+
+    # we have a valid zip archive and a valid member of that archive
+    tmp = tempfile.gettempdir()
+    extracted_path = os.path.join(tmp, member.split("/")[-1])
+    if not os.path.exists(extracted_path):
+        # use read + write to avoid the creating nested folders, we only want the file, avoids mkdir racing condition
+        with atomic_open(extracted_path) as file_handler:
+            file_handler.write(zip_file.read(member))
+    return extracted_path
+
+
+@contextlib.contextmanager
+def atomic_open(filename):
+    """Write a file to the disk in an atomic fashion"""
+    tmp_descriptor, tmp_name = tempfile.mkstemp(dir=os.path.dirname(filename))
+    try:
+        with os.fdopen(tmp_descriptor, "wb") as tmp_handler:
+            yield tmp_handler
+        os.replace(tmp_name, filename)
+    except BaseException:
+        os.remove(tmp_name)
+        raise
+
+
+def from_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. Unless it can not be represented as such, return an
+    OrderedDict, e.g.,
+
+    ::
+
+        >>> from_key_val_list([('key', 'val')])
+        OrderedDict([('key', 'val')])
+        >>> from_key_val_list('string')
+        Traceback (most recent call last):
+        ...
+        ValueError: cannot encode objects that are not 2-tuples
+        >>> from_key_val_list({'key': 'val'})
+        OrderedDict([('key', 'val')])
+
+    :rtype: OrderedDict
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError("cannot encode objects that are not 2-tuples")
+
+    return OrderedDict(value)
+
+
+def to_key_val_list(value):
+    """Take an object and test to see if it can be represented as a
+    dictionary. If it can be, return a list of tuples, e.g.,
+
+    ::
+
+        >>> to_key_val_list([('key', 'val')])
+        [('key', 'val')]
+        >>> to_key_val_list({'key': 'val'})
+        [('key', 'val')]
+        >>> to_key_val_list('string')
+        Traceback (most recent call last):
+        ...
+        ValueError: cannot encode objects that are not 2-tuples
+
+    :rtype: list
+    """
+    if value is None:
+        return None
+
+    if isinstance(value, (str, bytes, bool, int)):
+        raise ValueError("cannot encode objects that are not 2-tuples")
+
+    if isinstance(value, Mapping):
+        value = value.items()
+
+    return list(value)
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_list_header(value):
+    """Parse lists as described by RFC 2068 Section 2.
+
+    In particular, parse comma-separated lists where the elements of
+    the list may include quoted-strings.  A quoted-string could
+    contain a comma.  A non-quoted string could have quotes in the
+    middle.  Quotes are removed automatically after parsing.
+
+    It basically works like :func:`parse_set_header` just that items
+    may appear multiple times and case sensitivity is preserved.
+
+    The return value is a standard :class:`list`:
+
+    >>> parse_list_header('token, "quoted value"')
+    ['token', 'quoted value']
+
+    To create a header from the :class:`list` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a list header.
+    :return: :class:`list`
+    :rtype: list
+    """
+    result = []
+    for item in _parse_list_header(value):
+        if item[:1] == item[-1:] == '"':
+            item = unquote_header_value(item[1:-1])
+        result.append(item)
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def parse_dict_header(value):
+    """Parse lists of key, value pairs as described by RFC 2068 Section 2 and
+    convert them into a python dict:
+
+    >>> d = parse_dict_header('foo="is a fish", bar="as well"')
+    >>> type(d) is dict
+    True
+    >>> sorted(d.items())
+    [('bar', 'as well'), ('foo', 'is a fish')]
+
+    If there is no value for a key it will be `None`:
+
+    >>> parse_dict_header('key_without_value')
+    {'key_without_value': None}
+
+    To create a header from the :class:`dict` again, use the
+    :func:`dump_header` function.
+
+    :param value: a string with a dict header.
+    :return: :class:`dict`
+    :rtype: dict
+    """
+    result = {}
+    for item in _parse_list_header(value):
+        if "=" not in item:
+            result[item] = None
+            continue
+        name, value = item.split("=", 1)
+        if value[:1] == value[-1:] == '"':
+            value = unquote_header_value(value[1:-1])
+        result[name] = value
+    return result
+
+
+# From mitsuhiko/werkzeug (used with permission).
+def unquote_header_value(value, is_filename=False):
+    r"""Unquotes a header value.  (Reversal of :func:`quote_header_value`).
+    This does not use the real unquoting but what browsers are actually
+    using for quoting.
+
+    :param value: the header value to unquote.
+    :rtype: str
+    """
+    if value and value[0] == value[-1] == '"':
+        # this is not the real unquoting, but fixing this so that the
+        # RFC is met will result in bugs with internet explorer and
+        # probably some other browsers as well.  IE for example is
+        # uploading files with "C:\foo\bar.txt" as filename
+        value = value[1:-1]
+
+        # if this is a filename and the starting characters look like
+        # a UNC path, then just return the value without quotes.  Using the
+        # replace sequence below on a UNC path has the effect of turning
+        # the leading double slash into a single slash and then
+        # _fix_ie_filename() doesn't work correctly.  See #458.
+        if not is_filename or value[:2] != "\\\\":
+            return value.replace("\\\\", "\\").replace('\\"', '"')
+    return value
+
+
+def dict_from_cookiejar(cj):
+    """Returns a key/value dictionary from a CookieJar.
+
+    :param cj: CookieJar object to extract cookies from.
+    :rtype: dict
+    """
+
+    cookie_dict = {}
+
+    for cookie in cj:
+        cookie_dict[cookie.name] = cookie.value
+
+    return cookie_dict
+
+
+def add_dict_to_cookiejar(cj, cookie_dict):
+    """Returns a CookieJar from a key/value dictionary.
+
+    :param cj: CookieJar to insert cookies into.
+    :param cookie_dict: Dict of key/values to insert into CookieJar.
+    :rtype: CookieJar
+    """
+
+    return cookiejar_from_dict(cookie_dict, cj)
+
+
+def get_encodings_from_content(content):
+    """Returns encodings from given content string.
+
+    :param content: bytestring to extract encodings from.
+    """
+    warnings.warn(
+        (
+            "In requests 3.0, get_encodings_from_content will be removed. For "
+            "more information, please see the discussion on issue #2266. (This"
+            " warning should only appear once.)"
+        ),
+        DeprecationWarning,
+    )
+
+    charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
+    pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
+    xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
+
+    return (
+        charset_re.findall(content)
+        + pragma_re.findall(content)
+        + xml_re.findall(content)
+    )
+
+
+def _parse_content_type_header(header):
+    """Returns content type and parameters from given header
+
+    :param header: string
+    :return: tuple containing content type and dictionary of
+         parameters
+    """
+
+    tokens = header.split(";")
+    content_type, params = tokens[0].strip(), tokens[1:]
+    params_dict = {}
+    items_to_strip = "\"' "
+
+    for param in params:
+        param = param.strip()
+        if param:
+            key, value = param, True
+            index_of_equals = param.find("=")
+            if index_of_equals != -1:
+                key = param[:index_of_equals].strip(items_to_strip)
+                value = param[index_of_equals + 1 :].strip(items_to_strip)
+            params_dict[key.lower()] = value
+    return content_type, params_dict
+
+
+def get_encoding_from_headers(headers):
+    """Returns encodings from given HTTP Header Dict.
+
+    :param headers: dictionary to extract encoding from.
+    :rtype: str
+    """
+
+    content_type = headers.get("content-type")
+
+    if not content_type:
+        return None
+
+    content_type, params = _parse_content_type_header(content_type)
+
+    if "charset" in params:
+        return params["charset"].strip("'\"")
+
+    if "text" in content_type:
+        return "ISO-8859-1"
+
+    if "application/json" in content_type:
+        # Assume UTF-8 based on RFC 4627: https://www.ietf.org/rfc/rfc4627.txt since the charset was unset
+        return "utf-8"
+
+
+def stream_decode_response_unicode(iterator, r):
+    """Stream decodes an iterator."""
+
+    if r.encoding is None:
+        yield from iterator
+        return
+
+    decoder = codecs.getincrementaldecoder(r.encoding)(errors="replace")
+    for chunk in iterator:
+        rv = decoder.decode(chunk)
+        if rv:
+            yield rv
+    rv = decoder.decode(b"", final=True)
+    if rv:
+        yield rv
+
+
+def iter_slices(string, slice_length):
+    """Iterate over slices of a string."""
+    pos = 0
+    if slice_length is None or slice_length <= 0:
+        slice_length = len(string)
+    while pos < len(string):
+        yield string[pos : pos + slice_length]
+        pos += slice_length
+
+
+def get_unicode_from_response(r):
+    """Returns the requested content back in unicode.
+
+    :param r: Response object to get unicode content from.
+
+    Tried:
+
+    1. charset from content-type
+    2. fall back and replace all unicode characters
+
+    :rtype: str
+    """
+    warnings.warn(
+        (
+            "In requests 3.0, get_unicode_from_response will be removed. For "
+            "more information, please see the discussion on issue #2266. (This"
+            " warning should only appear once.)"
+        ),
+        DeprecationWarning,
+    )
+
+    tried_encodings = []
+
+    # Try charset from content-type
+    encoding = get_encoding_from_headers(r.headers)
+
+    if encoding:
+        try:
+            return str(r.content, encoding)
+        except UnicodeError:
+            tried_encodings.append(encoding)
+
+    # Fall back:
+    try:
+        return str(r.content, encoding, errors="replace")
+    except TypeError:
+        return r.content
+
+
+# The unreserved URI characters (RFC 3986)
+UNRESERVED_SET = frozenset(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~"
+)
+
+
+def unquote_unreserved(uri):
+    """Un-escape any percent-escape sequences in a URI that are unreserved
+    characters. This leaves all reserved, illegal and non-ASCII bytes encoded.
+
+    :rtype: str
+    """
+    parts = uri.split("%")
+    for i in range(1, len(parts)):
+        h = parts[i][0:2]
+        if len(h) == 2 and h.isalnum():
+            try:
+                c = chr(int(h, 16))
+            except ValueError:
+                raise InvalidURL(f"Invalid percent-escape sequence: '{h}'")
+
+            if c in UNRESERVED_SET:
+                parts[i] = c + parts[i][2:]
+            else:
+                parts[i] = f"%{parts[i]}"
+        else:
+            parts[i] = f"%{parts[i]}"
+    return "".join(parts)
+
+
+def requote_uri(uri):
+    """Re-quote the given URI.
+
+    This function passes the given URI through an unquote/quote cycle to
+    ensure that it is fully and consistently quoted.
+
+    :rtype: str
+    """
+    safe_with_percent = "!#$%&'()*+,/:;=?@[]~"
+    safe_without_percent = "!#$&'()*+,/:;=?@[]~"
+    try:
+        # Unquote only the unreserved characters
+        # Then quote only illegal characters (do not quote reserved,
+        # unreserved, or '%')
+        return quote(unquote_unreserved(uri), safe=safe_with_percent)
+    except InvalidURL:
+        # We couldn't unquote the given URI, so let's try quoting it, but
+        # there may be unquoted '%'s in the URI. We need to make sure they're
+        # properly quoted so they do not cause issues elsewhere.
+        return quote(uri, safe=safe_without_percent)
+
+
+def address_in_network(ip, net):
+    """This function allows you to check if an IP belongs to a network subnet
+
+    Example: returns True if ip = 192.168.1.1 and net = 192.168.1.0/24
+             returns False if ip = 192.168.1.1 and net = 192.168.100.0/24
+
+    :rtype: bool
+    """
+    ipaddr = struct.unpack("=L", socket.inet_aton(ip))[0]
+    netaddr, bits = net.split("/")
+    netmask = struct.unpack("=L", socket.inet_aton(dotted_netmask(int(bits))))[0]
+    network = struct.unpack("=L", socket.inet_aton(netaddr))[0] & netmask
+    return (ipaddr & netmask) == (network & netmask)
+
+
+def dotted_netmask(mask):
+    """Converts mask from /xx format to xxx.xxx.xxx.xxx
+
+    Example: if mask is 24 function returns 255.255.255.0
+
+    :rtype: str
+    """
+    bits = 0xFFFFFFFF ^ (1 << 32 - mask) - 1
+    return socket.inet_ntoa(struct.pack(">I", bits))
+
+
+def is_ipv4_address(string_ip):
+    """
+    :rtype: bool
+    """
+    try:
+        socket.inet_aton(string_ip)
+    except OSError:
+        return False
+    return True
+
+
+def is_valid_cidr(string_network):
+    """
+    Very simple check of the cidr format in no_proxy variable.
+
+    :rtype: bool
+    """
+    if string_network.count("/") == 1:
+        try:
+            mask = int(string_network.split("/")[1])
+        except ValueError:
+            return False
+
+        if mask < 1 or mask > 32:
+            return False
+
+        try:
+            socket.inet_aton(string_network.split("/")[0])
+        except OSError:
+            return False
+    else:
+        return False
+    return True
+
+
+@contextlib.contextmanager
+def set_environ(env_name, value):
+    """Set the environment variable 'env_name' to 'value'
+
+    Save previous value, yield, and then restore the previous value stored in
+    the environment variable 'env_name'.
+
+    If 'value' is None, do nothing"""
+    value_changed = value is not None
+    if value_changed:
+        old_value = os.environ.get(env_name)
+        os.environ[env_name] = value
+    try:
+        yield
+    finally:
+        if value_changed:
+            if old_value is None:
+                del os.environ[env_name]
+            else:
+                os.environ[env_name] = old_value
+
+
+def should_bypass_proxies(url, no_proxy):
+    """
+    Returns whether we should bypass proxies or not.
+
+    :rtype: bool
+    """
+    # Prioritize lowercase environment variables over uppercase
+    # to keep a consistent behaviour with other http projects (curl, wget).
+    def get_proxy(key):
+        return os.environ.get(key) or os.environ.get(key.upper())
+
+    # First check whether no_proxy is defined. If it is, check that the URL
+    # we're getting isn't in the no_proxy list.
+    no_proxy_arg = no_proxy
+    if no_proxy is None:
+        no_proxy = get_proxy("no_proxy")
+    parsed = urlparse(url)
+
+    if parsed.hostname is None:
+        # URLs don't always have hostnames, e.g. file:/// urls.
+        return True
+
+    if no_proxy:
+        # We need to check whether we match here. We need to see if we match
+        # the end of the hostname, both with and without the port.
+        no_proxy = (host for host in no_proxy.replace(" ", "").split(",") if host)
+
+        if is_ipv4_address(parsed.hostname):
+            for proxy_ip in no_proxy:
+                if is_valid_cidr(proxy_ip):
+                    if address_in_network(parsed.hostname, proxy_ip):
+                        return True
+                elif parsed.hostname == proxy_ip:
+                    # If no_proxy ip was defined in plain IP notation instead of cidr notation &
+                    # matches the IP of the index
+                    return True
+        else:
+            host_with_port = parsed.hostname
+            if parsed.port:
+                host_with_port += f":{parsed.port}"
+
+            for host in no_proxy:
+                if parsed.hostname.endswith(host) or host_with_port.endswith(host):
+                    # The URL does match something in no_proxy, so we don't want
+                    # to apply the proxies on this URL.
+                    return True
+
+    with set_environ("no_proxy", no_proxy_arg):
+        # parsed.hostname can be `None` in cases such as a file URI.
+        try:
+            bypass = proxy_bypass(parsed.hostname)
+        except (TypeError, socket.gaierror):
+            bypass = False
+
+    if bypass:
+        return True
+
+    return False
+
+
+def get_environ_proxies(url, no_proxy=None):
+    """
+    Return a dict of environment proxies.
+
+    :rtype: dict
+    """
+    if should_bypass_proxies(url, no_proxy=no_proxy):
+        return {}
+    else:
+        return getproxies()
+
+
+def select_proxy(url, proxies):
+    """Select a proxy for the url, if applicable.
+
+    :param url: The url being for the request
+    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
+    """
+    proxies = proxies or {}
+    urlparts = urlparse(url)
+    if urlparts.hostname is None:
+        return proxies.get(urlparts.scheme, proxies.get("all"))
+
+    proxy_keys = [
+        urlparts.scheme + "://" + urlparts.hostname,
+        urlparts.scheme,
+        "all://" + urlparts.hostname,
+        "all",
+    ]
+    proxy = None
+    for proxy_key in proxy_keys:
+        if proxy_key in proxies:
+            proxy = proxies[proxy_key]
+            break
+
+    return proxy
+
+
+def resolve_proxies(request, proxies, trust_env=True):
+    """This method takes proxy information from a request and configuration
+    input to resolve a mapping of target proxies. This will consider settings
+    such a NO_PROXY to strip proxy configurations.
+
+    :param request: Request or PreparedRequest
+    :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
+    :param trust_env: Boolean declaring whether to trust environment configs
+
+    :rtype: dict
+    """
+    proxies = proxies if proxies is not None else {}
+    url = request.url
+    scheme = urlparse(url).scheme
+    no_proxy = proxies.get("no_proxy")
+    new_proxies = proxies.copy()
+
+    if trust_env and not should_bypass_proxies(url, no_proxy=no_proxy):
+        environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
+
+        proxy = environ_proxies.get(scheme, environ_proxies.get("all"))
+
+        if proxy:
+            new_proxies.setdefault(scheme, proxy)
+    return new_proxies
+
+
+def default_user_agent(name="python-requests"):
+    """
+    Return a string representing the default user agent.
+
+    :rtype: str
+    """
+    return f"{name}/{__version__}"
+
+
+def default_headers():
+    """
+    :rtype: requests.structures.CaseInsensitiveDict
+    """
+    return CaseInsensitiveDict(
+        {
+            "User-Agent": default_user_agent(),
+            "Accept-Encoding": DEFAULT_ACCEPT_ENCODING,
+            "Accept": "*/*",
+            "Connection": "keep-alive",
+        }
+    )
+
+
+def parse_header_links(value):
+    """Return a list of parsed link headers proxies.
+
+    i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
+
+    :rtype: list
+    """
+
+    links = []
+
+    replace_chars = " '\""
+
+    value = value.strip(replace_chars)
+    if not value:
+        return links
+
+    for val in re.split(", *<", value):
+        try:
+            url, params = val.split(";", 1)
+        except ValueError:
+            url, params = val, ""
+
+        link = {"url": url.strip("<> '\"")}
+
+        for param in params.split(";"):
+            try:
+                key, value = param.split("=")
+            except ValueError:
+                break
+
+            link[key.strip(replace_chars)] = value.strip(replace_chars)
+
+        links.append(link)
+
+    return links
+
+
+# Null bytes; no need to recreate these on each call to guess_json_utf
+_null = "\x00".encode("ascii")  # encoding to ASCII for Python 3
+_null2 = _null * 2
+_null3 = _null * 3
+
+
+def guess_json_utf(data):
+    """
+    :rtype: str
+    """
+    # JSON always starts with two ASCII characters, so detection is as
+    # easy as counting the nulls and from their location and count
+    # determine the encoding. Also detect a BOM, if present.
+    sample = data[:4]
+    if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
+        return "utf-32"  # BOM included
+    if sample[:3] == codecs.BOM_UTF8:
+        return "utf-8-sig"  # BOM included, MS style (discouraged)
+    if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
+        return "utf-16"  # BOM included
+    nullcount = sample.count(_null)
+    if nullcount == 0:
+        return "utf-8"
+    if nullcount == 2:
+        if sample[::2] == _null2:  # 1st and 3rd are null
+            return "utf-16-be"
+        if sample[1::2] == _null2:  # 2nd and 4th are null
+            return "utf-16-le"
+        # Did not detect 2 valid UTF-16 ascii-range characters
+    if nullcount == 3:
+        if sample[:3] == _null3:
+            return "utf-32-be"
+        if sample[1:] == _null3:
+            return "utf-32-le"
+        # Did not detect a valid UTF-32 ascii-range character
+    return None
+
+
+def prepend_scheme_if_needed(url, new_scheme):
+    """Given a URL that may or may not have a scheme, prepend the given scheme.
+    Does not replace a present scheme with the one provided as an argument.
+
+    :rtype: str
+    """
+    parsed = parse_url(url)
+    scheme, auth, host, port, path, query, fragment = parsed
+
+    # A defect in urlparse determines that there isn't a netloc present in some
+    # urls. We previously assumed parsing was overly cautious, and swapped the
+    # netloc and path. Due to a lack of tests on the original defect, this is
+    # maintained with parse_url for backwards compatibility.
+    netloc = parsed.netloc
+    if not netloc:
+        netloc, path = path, netloc
+
+    if auth:
+        # parse_url doesn't provide the netloc with auth
+        # so we'll add it ourselves.
+        netloc = "@".join([auth, netloc])
+    if scheme is None:
+        scheme = new_scheme
+    if path is None:
+        path = ""
+
+    return urlunparse((scheme, netloc, path, "", query, fragment))
+
+
+def get_auth_from_url(url):
+    """Given a url with authentication components, extract them into a tuple of
+    username,password.
+
+    :rtype: (str,str)
+    """
+    parsed = urlparse(url)
+
+    try:
+        auth = (unquote(parsed.username), unquote(parsed.password))
+    except (AttributeError, TypeError):
+        auth = ("", "")
+
+    return auth
+
+
+def check_header_validity(header):
+    """Verifies that header parts don't contain leading whitespace
+    reserved characters, or return characters.
+
+    :param header: tuple, in the format (name, value).
+    """
+    name, value = header
+
+    for part in header:
+        if type(part) not in HEADER_VALIDATORS:
+            raise InvalidHeader(
+                f"Header part ({part!r}) from {{{name!r}: {value!r}}} must be "
+                f"of type str or bytes, not {type(part)}"
+            )
+
+    _validate_header_part(name, "name", HEADER_VALIDATORS[type(name)][0])
+    _validate_header_part(value, "value", HEADER_VALIDATORS[type(value)][1])
+
+
+def _validate_header_part(header_part, header_kind, validator):
+    if not validator.match(header_part):
+        raise InvalidHeader(
+            f"Invalid leading whitespace, reserved character(s), or return"
+            f"character(s) in header {header_kind}: {header_part!r}"
+        )
+
+
+def urldefragauth(url):
+    """
+    Given a url remove the fragment and the authentication part.
+
+    :rtype: str
+    """
+    scheme, netloc, path, params, query, fragment = urlparse(url)
+
+    # see func:`prepend_scheme_if_needed`
+    if not netloc:
+        netloc, path = path, netloc
+
+    netloc = netloc.rsplit("@", 1)[-1]
+
+    return urlunparse((scheme, netloc, path, params, query, ""))
+
+
+def rewind_body(prepared_request):
+    """Move file pointer back to its recorded starting position
+    so it can be read again on redirect.
+    """
+    body_seek = getattr(prepared_request.body, "seek", None)
+    if body_seek is not None and isinstance(
+        prepared_request._body_position, integer_types
+    ):
+        try:
+            body_seek(prepared_request._body_position)
+        except OSError:
+            raise UnrewindableBodyError(
+                "An error occurred when rewinding request body for redirect."
+            )
+    else:
+        raise UnrewindableBodyError("Unable to rewind request body for redirect.")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/__init__.py
new file mode 100644
index 0000000..ce05fd3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/__init__.py
@@ -0,0 +1,26 @@
+__all__ = [
+    "__version__",
+    "AbstractProvider",
+    "AbstractResolver",
+    "BaseReporter",
+    "InconsistentCandidate",
+    "Resolver",
+    "RequirementsConflicted",
+    "ResolutionError",
+    "ResolutionImpossible",
+    "ResolutionTooDeep",
+]
+
+__version__ = "0.8.1"
+
+
+from .providers import AbstractProvider, AbstractResolver
+from .reporters import BaseReporter
+from .resolvers import (
+    InconsistentCandidate,
+    RequirementsConflicted,
+    ResolutionError,
+    ResolutionImpossible,
+    ResolutionTooDeep,
+    Resolver,
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/__pycache__/__init__.cpython-39.pyc
new file mode 100644
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new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py
new file mode 100644
index 0000000..1becc50
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/compat/collections_abc.py
@@ -0,0 +1,6 @@
+__all__ = ["Mapping", "Sequence"]
+
+try:
+    from collections.abc import Mapping, Sequence
+except ImportError:
+    from collections import Mapping, Sequence
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/providers.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/providers.py
new file mode 100644
index 0000000..7d0a9c2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/providers.py
@@ -0,0 +1,133 @@
+class AbstractProvider(object):
+    """Delegate class to provide requirement interface for the resolver."""
+
+    def identify(self, requirement_or_candidate):
+        """Given a requirement, return an identifier for it.
+
+        This is used to identify a requirement, e.g. whether two requirements
+        should have their specifier parts merged.
+        """
+        raise NotImplementedError
+
+    def get_preference(
+        self,
+        identifier,
+        resolutions,
+        candidates,
+        information,
+        backtrack_causes,
+    ):
+        """Produce a sort key for given requirement based on preference.
+
+        The preference is defined as "I think this requirement should be
+        resolved first". The lower the return value is, the more preferred
+        this group of arguments is.
+
+        :param identifier: An identifier as returned by ``identify()``. This
+            identifies the dependency matches of which should be returned.
+        :param resolutions: Mapping of candidates currently pinned by the
+            resolver. Each key is an identifier, and the value a candidate.
+            The candidate may conflict with requirements from ``information``.
+        :param candidates: Mapping of each dependency's possible candidates.
+            Each value is an iterator of candidates.
+        :param information: Mapping of requirement information of each package.
+            Each value is an iterator of *requirement information*.
+        :param backtrack_causes: Sequence of requirement information that were
+            the requirements that caused the resolver to most recently backtrack.
+
+        A *requirement information* instance is a named tuple with two members:
+
+        * ``requirement`` specifies a requirement contributing to the current
+          list of candidates.
+        * ``parent`` specifies the candidate that provides (dependend on) the
+          requirement, or ``None`` to indicate a root requirement.
+
+        The preference could depend on a various of issues, including (not
+        necessarily in this order):
+
+        * Is this package pinned in the current resolution result?
+        * How relaxed is the requirement? Stricter ones should probably be
+          worked on first? (I don't know, actually.)
+        * How many possibilities are there to satisfy this requirement? Those
+          with few left should likely be worked on first, I guess?
+        * Are there any known conflicts for this requirement? We should
+          probably work on those with the most known conflicts.
+
+        A sortable value should be returned (this will be used as the ``key``
+        parameter of the built-in sorting function). The smaller the value is,
+        the more preferred this requirement is (i.e. the sorting function
+        is called with ``reverse=False``).
+        """
+        raise NotImplementedError
+
+    def find_matches(self, identifier, requirements, incompatibilities):
+        """Find all possible candidates that satisfy given constraints.
+
+        :param identifier: An identifier as returned by ``identify()``. This
+            identifies the dependency matches of which should be returned.
+        :param requirements: A mapping of requirements that all returned
+            candidates must satisfy. Each key is an identifier, and the value
+            an iterator of requirements for that dependency.
+        :param incompatibilities: A mapping of known incompatibilities of
+            each dependency. Each key is an identifier, and the value an
+            iterator of incompatibilities known to the resolver. All
+            incompatibilities *must* be excluded from the return value.
+
+        This should try to get candidates based on the requirements' types.
+        For VCS, local, and archive requirements, the one-and-only match is
+        returned, and for a "named" requirement, the index(es) should be
+        consulted to find concrete candidates for this requirement.
+
+        The return value should produce candidates ordered by preference; the
+        most preferred candidate should come first. The return type may be one
+        of the following:
+
+        * A callable that returns an iterator that yields candidates.
+        * An collection of candidates.
+        * An iterable of candidates. This will be consumed immediately into a
+          list of candidates.
+        """
+        raise NotImplementedError
+
+    def is_satisfied_by(self, requirement, candidate):
+        """Whether the given requirement can be satisfied by a candidate.
+
+        The candidate is guarenteed to have been generated from the
+        requirement.
+
+        A boolean should be returned to indicate whether ``candidate`` is a
+        viable solution to the requirement.
+        """
+        raise NotImplementedError
+
+    def get_dependencies(self, candidate):
+        """Get dependencies of a candidate.
+
+        This should return a collection of requirements that `candidate`
+        specifies as its dependencies.
+        """
+        raise NotImplementedError
+
+
+class AbstractResolver(object):
+    """The thing that performs the actual resolution work."""
+
+    base_exception = Exception
+
+    def __init__(self, provider, reporter):
+        self.provider = provider
+        self.reporter = reporter
+
+    def resolve(self, requirements, **kwargs):
+        """Take a collection of constraints, spit out the resolution result.
+
+        This returns a representation of the final resolution state, with one
+        guarenteed attribute ``mapping`` that contains resolved candidates as
+        values. The keys are their respective identifiers.
+
+        :param requirements: A collection of constraints.
+        :param kwargs: Additional keyword arguments that subclasses may accept.
+
+        :raises: ``self.base_exception`` or its subclass.
+        """
+        raise NotImplementedError
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/reporters.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/reporters.py
new file mode 100644
index 0000000..6695480
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/reporters.py
@@ -0,0 +1,43 @@
+class BaseReporter(object):
+    """Delegate class to provider progress reporting for the resolver."""
+
+    def starting(self):
+        """Called before the resolution actually starts."""
+
+    def starting_round(self, index):
+        """Called before each round of resolution starts.
+
+        The index is zero-based.
+        """
+
+    def ending_round(self, index, state):
+        """Called before each round of resolution ends.
+
+        This is NOT called if the resolution ends at this round. Use `ending`
+        if you want to report finalization. The index is zero-based.
+        """
+
+    def ending(self, state):
+        """Called before the resolution ends successfully."""
+
+    def adding_requirement(self, requirement, parent):
+        """Called when adding a new requirement into the resolve criteria.
+
+        :param requirement: The additional requirement to be applied to filter
+            the available candidaites.
+        :param parent: The candidate that requires ``requirement`` as a
+            dependency, or None if ``requirement`` is one of the root
+            requirements passed in from ``Resolver.resolve()``.
+        """
+
+    def resolving_conflicts(self, causes):
+        """Called when starting to attempt requirement conflict resolution.
+
+        :param causes: The information on the collision that caused the backtracking.
+        """
+
+    def backtracking(self, candidate):
+        """Called when rejecting a candidate during backtracking."""
+
+    def pinning(self, candidate):
+        """Called when adding a candidate to the potential solution."""
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/resolvers.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/resolvers.py
new file mode 100644
index 0000000..787681b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/resolvers.py
@@ -0,0 +1,482 @@
+import collections
+import operator
+
+from .providers import AbstractResolver
+from .structs import DirectedGraph, IteratorMapping, build_iter_view
+
+RequirementInformation = collections.namedtuple(
+    "RequirementInformation", ["requirement", "parent"]
+)
+
+
+class ResolverException(Exception):
+    """A base class for all exceptions raised by this module.
+
+    Exceptions derived by this class should all be handled in this module. Any
+    bubbling pass the resolver should be treated as a bug.
+    """
+
+
+class RequirementsConflicted(ResolverException):
+    def __init__(self, criterion):
+        super(RequirementsConflicted, self).__init__(criterion)
+        self.criterion = criterion
+
+    def __str__(self):
+        return "Requirements conflict: {}".format(
+            ", ".join(repr(r) for r in self.criterion.iter_requirement()),
+        )
+
+
+class InconsistentCandidate(ResolverException):
+    def __init__(self, candidate, criterion):
+        super(InconsistentCandidate, self).__init__(candidate, criterion)
+        self.candidate = candidate
+        self.criterion = criterion
+
+    def __str__(self):
+        return "Provided candidate {!r} does not satisfy {}".format(
+            self.candidate,
+            ", ".join(repr(r) for r in self.criterion.iter_requirement()),
+        )
+
+
+class Criterion(object):
+    """Representation of possible resolution results of a package.
+
+    This holds three attributes:
+
+    * `information` is a collection of `RequirementInformation` pairs.
+      Each pair is a requirement contributing to this criterion, and the
+      candidate that provides the requirement.
+    * `incompatibilities` is a collection of all known not-to-work candidates
+      to exclude from consideration.
+    * `candidates` is a collection containing all possible candidates deducted
+      from the union of contributing requirements and known incompatibilities.
+      It should never be empty, except when the criterion is an attribute of a
+      raised `RequirementsConflicted` (in which case it is always empty).
+
+    .. note::
+        This class is intended to be externally immutable. **Do not** mutate
+        any of its attribute containers.
+    """
+
+    def __init__(self, candidates, information, incompatibilities):
+        self.candidates = candidates
+        self.information = information
+        self.incompatibilities = incompatibilities
+
+    def __repr__(self):
+        requirements = ", ".join(
+            "({!r}, via={!r})".format(req, parent)
+            for req, parent in self.information
+        )
+        return "Criterion({})".format(requirements)
+
+    def iter_requirement(self):
+        return (i.requirement for i in self.information)
+
+    def iter_parent(self):
+        return (i.parent for i in self.information)
+
+
+class ResolutionError(ResolverException):
+    pass
+
+
+class ResolutionImpossible(ResolutionError):
+    def __init__(self, causes):
+        super(ResolutionImpossible, self).__init__(causes)
+        # causes is a list of RequirementInformation objects
+        self.causes = causes
+
+
+class ResolutionTooDeep(ResolutionError):
+    def __init__(self, round_count):
+        super(ResolutionTooDeep, self).__init__(round_count)
+        self.round_count = round_count
+
+
+# Resolution state in a round.
+State = collections.namedtuple("State", "mapping criteria backtrack_causes")
+
+
+class Resolution(object):
+    """Stateful resolution object.
+
+    This is designed as a one-off object that holds information to kick start
+    the resolution process, and holds the results afterwards.
+    """
+
+    def __init__(self, provider, reporter):
+        self._p = provider
+        self._r = reporter
+        self._states = []
+
+    @property
+    def state(self):
+        try:
+            return self._states[-1]
+        except IndexError:
+            raise AttributeError("state")
+
+    def _push_new_state(self):
+        """Push a new state into history.
+
+        This new state will be used to hold resolution results of the next
+        coming round.
+        """
+        base = self._states[-1]
+        state = State(
+            mapping=base.mapping.copy(),
+            criteria=base.criteria.copy(),
+            backtrack_causes=base.backtrack_causes[:],
+        )
+        self._states.append(state)
+
+    def _add_to_criteria(self, criteria, requirement, parent):
+        self._r.adding_requirement(requirement=requirement, parent=parent)
+
+        identifier = self._p.identify(requirement_or_candidate=requirement)
+        criterion = criteria.get(identifier)
+        if criterion:
+            incompatibilities = list(criterion.incompatibilities)
+        else:
+            incompatibilities = []
+
+        matches = self._p.find_matches(
+            identifier=identifier,
+            requirements=IteratorMapping(
+                criteria,
+                operator.methodcaller("iter_requirement"),
+                {identifier: [requirement]},
+            ),
+            incompatibilities=IteratorMapping(
+                criteria,
+                operator.attrgetter("incompatibilities"),
+                {identifier: incompatibilities},
+            ),
+        )
+
+        if criterion:
+            information = list(criterion.information)
+            information.append(RequirementInformation(requirement, parent))
+        else:
+            information = [RequirementInformation(requirement, parent)]
+
+        criterion = Criterion(
+            candidates=build_iter_view(matches),
+            information=information,
+            incompatibilities=incompatibilities,
+        )
+        if not criterion.candidates:
+            raise RequirementsConflicted(criterion)
+        criteria[identifier] = criterion
+
+    def _get_preference(self, name):
+        return self._p.get_preference(
+            identifier=name,
+            resolutions=self.state.mapping,
+            candidates=IteratorMapping(
+                self.state.criteria,
+                operator.attrgetter("candidates"),
+            ),
+            information=IteratorMapping(
+                self.state.criteria,
+                operator.attrgetter("information"),
+            ),
+            backtrack_causes=self.state.backtrack_causes,
+        )
+
+    def _is_current_pin_satisfying(self, name, criterion):
+        try:
+            current_pin = self.state.mapping[name]
+        except KeyError:
+            return False
+        return all(
+            self._p.is_satisfied_by(requirement=r, candidate=current_pin)
+            for r in criterion.iter_requirement()
+        )
+
+    def _get_updated_criteria(self, candidate):
+        criteria = self.state.criteria.copy()
+        for requirement in self._p.get_dependencies(candidate=candidate):
+            self._add_to_criteria(criteria, requirement, parent=candidate)
+        return criteria
+
+    def _attempt_to_pin_criterion(self, name):
+        criterion = self.state.criteria[name]
+
+        causes = []
+        for candidate in criterion.candidates:
+            try:
+                criteria = self._get_updated_criteria(candidate)
+            except RequirementsConflicted as e:
+                causes.append(e.criterion)
+                continue
+
+            # Check the newly-pinned candidate actually works. This should
+            # always pass under normal circumstances, but in the case of a
+            # faulty provider, we will raise an error to notify the implementer
+            # to fix find_matches() and/or is_satisfied_by().
+            satisfied = all(
+                self._p.is_satisfied_by(requirement=r, candidate=candidate)
+                for r in criterion.iter_requirement()
+            )
+            if not satisfied:
+                raise InconsistentCandidate(candidate, criterion)
+
+            self._r.pinning(candidate=candidate)
+            self.state.criteria.update(criteria)
+
+            # Put newly-pinned candidate at the end. This is essential because
+            # backtracking looks at this mapping to get the last pin.
+            self.state.mapping.pop(name, None)
+            self.state.mapping[name] = candidate
+
+            return []
+
+        # All candidates tried, nothing works. This criterion is a dead
+        # end, signal for backtracking.
+        return causes
+
+    def _backtrack(self):
+        """Perform backtracking.
+
+        When we enter here, the stack is like this::
+
+            [ state Z ]
+            [ state Y ]
+            [ state X ]
+            .... earlier states are irrelevant.
+
+        1. No pins worked for Z, so it does not have a pin.
+        2. We want to reset state Y to unpinned, and pin another candidate.
+        3. State X holds what state Y was before the pin, but does not
+           have the incompatibility information gathered in state Y.
+
+        Each iteration of the loop will:
+
+        1.  Discard Z.
+        2.  Discard Y but remember its incompatibility information gathered
+            previously, and the failure we're dealing with right now.
+        3.  Push a new state Y' based on X, and apply the incompatibility
+            information from Y to Y'.
+        4a. If this causes Y' to conflict, we need to backtrack again. Make Y'
+            the new Z and go back to step 2.
+        4b. If the incompatibilities apply cleanly, end backtracking.
+        """
+        while len(self._states) >= 3:
+            # Remove the state that triggered backtracking.
+            del self._states[-1]
+
+            # Retrieve the last candidate pin and known incompatibilities.
+            broken_state = self._states.pop()
+            name, candidate = broken_state.mapping.popitem()
+            incompatibilities_from_broken = [
+                (k, list(v.incompatibilities))
+                for k, v in broken_state.criteria.items()
+            ]
+
+            # Also mark the newly known incompatibility.
+            incompatibilities_from_broken.append((name, [candidate]))
+
+            self._r.backtracking(candidate=candidate)
+
+            # Create a new state from the last known-to-work one, and apply
+            # the previously gathered incompatibility information.
+            def _patch_criteria():
+                for k, incompatibilities in incompatibilities_from_broken:
+                    if not incompatibilities:
+                        continue
+                    try:
+                        criterion = self.state.criteria[k]
+                    except KeyError:
+                        continue
+                    matches = self._p.find_matches(
+                        identifier=k,
+                        requirements=IteratorMapping(
+                            self.state.criteria,
+                            operator.methodcaller("iter_requirement"),
+                        ),
+                        incompatibilities=IteratorMapping(
+                            self.state.criteria,
+                            operator.attrgetter("incompatibilities"),
+                            {k: incompatibilities},
+                        ),
+                    )
+                    candidates = build_iter_view(matches)
+                    if not candidates:
+                        return False
+                    incompatibilities.extend(criterion.incompatibilities)
+                    self.state.criteria[k] = Criterion(
+                        candidates=candidates,
+                        information=list(criterion.information),
+                        incompatibilities=incompatibilities,
+                    )
+                return True
+
+            self._push_new_state()
+            success = _patch_criteria()
+
+            # It works! Let's work on this new state.
+            if success:
+                return True
+
+            # State does not work after applying known incompatibilities.
+            # Try the still previous state.
+
+        # No way to backtrack anymore.
+        return False
+
+    def resolve(self, requirements, max_rounds):
+        if self._states:
+            raise RuntimeError("already resolved")
+
+        self._r.starting()
+
+        # Initialize the root state.
+        self._states = [
+            State(
+                mapping=collections.OrderedDict(),
+                criteria={},
+                backtrack_causes=[],
+            )
+        ]
+        for r in requirements:
+            try:
+                self._add_to_criteria(self.state.criteria, r, parent=None)
+            except RequirementsConflicted as e:
+                raise ResolutionImpossible(e.criterion.information)
+
+        # The root state is saved as a sentinel so the first ever pin can have
+        # something to backtrack to if it fails. The root state is basically
+        # pinning the virtual "root" package in the graph.
+        self._push_new_state()
+
+        for round_index in range(max_rounds):
+            self._r.starting_round(index=round_index)
+
+            unsatisfied_names = [
+                key
+                for key, criterion in self.state.criteria.items()
+                if not self._is_current_pin_satisfying(key, criterion)
+            ]
+
+            # All criteria are accounted for. Nothing more to pin, we are done!
+            if not unsatisfied_names:
+                self._r.ending(state=self.state)
+                return self.state
+
+            # Choose the most preferred unpinned criterion to try.
+            name = min(unsatisfied_names, key=self._get_preference)
+            failure_causes = self._attempt_to_pin_criterion(name)
+
+            if failure_causes:
+                causes = [i for c in failure_causes for i in c.information]
+                # Backtrack if pinning fails. The backtrack process puts us in
+                # an unpinned state, so we can work on it in the next round.
+                self._r.resolving_conflicts(causes=causes)
+                success = self._backtrack()
+                self.state.backtrack_causes[:] = causes
+
+                # Dead ends everywhere. Give up.
+                if not success:
+                    raise ResolutionImpossible(self.state.backtrack_causes)
+            else:
+                # Pinning was successful. Push a new state to do another pin.
+                self._push_new_state()
+
+            self._r.ending_round(index=round_index, state=self.state)
+
+        raise ResolutionTooDeep(max_rounds)
+
+
+def _has_route_to_root(criteria, key, all_keys, connected):
+    if key in connected:
+        return True
+    if key not in criteria:
+        return False
+    for p in criteria[key].iter_parent():
+        try:
+            pkey = all_keys[id(p)]
+        except KeyError:
+            continue
+        if pkey in connected:
+            connected.add(key)
+            return True
+        if _has_route_to_root(criteria, pkey, all_keys, connected):
+            connected.add(key)
+            return True
+    return False
+
+
+Result = collections.namedtuple("Result", "mapping graph criteria")
+
+
+def _build_result(state):
+    mapping = state.mapping
+    all_keys = {id(v): k for k, v in mapping.items()}
+    all_keys[id(None)] = None
+
+    graph = DirectedGraph()
+    graph.add(None)  # Sentinel as root dependencies' parent.
+
+    connected = {None}
+    for key, criterion in state.criteria.items():
+        if not _has_route_to_root(state.criteria, key, all_keys, connected):
+            continue
+        if key not in graph:
+            graph.add(key)
+        for p in criterion.iter_parent():
+            try:
+                pkey = all_keys[id(p)]
+            except KeyError:
+                continue
+            if pkey not in graph:
+                graph.add(pkey)
+            graph.connect(pkey, key)
+
+    return Result(
+        mapping={k: v for k, v in mapping.items() if k in connected},
+        graph=graph,
+        criteria=state.criteria,
+    )
+
+
+class Resolver(AbstractResolver):
+    """The thing that performs the actual resolution work."""
+
+    base_exception = ResolverException
+
+    def resolve(self, requirements, max_rounds=100):
+        """Take a collection of constraints, spit out the resolution result.
+
+        The return value is a representation to the final resolution result. It
+        is a tuple subclass with three public members:
+
+        * `mapping`: A dict of resolved candidates. Each key is an identifier
+            of a requirement (as returned by the provider's `identify` method),
+            and the value is the resolved candidate.
+        * `graph`: A `DirectedGraph` instance representing the dependency tree.
+            The vertices are keys of `mapping`, and each edge represents *why*
+            a particular package is included. A special vertex `None` is
+            included to represent parents of user-supplied requirements.
+        * `criteria`: A dict of "criteria" that hold detailed information on
+            how edges in the graph are derived. Each key is an identifier of a
+            requirement, and the value is a `Criterion` instance.
+
+        The following exceptions may be raised if a resolution cannot be found:
+
+        * `ResolutionImpossible`: A resolution cannot be found for the given
+            combination of requirements. The `causes` attribute of the
+            exception is a list of (requirement, parent), giving the
+            requirements that could not be satisfied.
+        * `ResolutionTooDeep`: The dependency tree is too deeply nested and
+            the resolver gave up. This is usually caused by a circular
+            dependency, but you can try to resolve this by increasing the
+            `max_rounds` argument.
+        """
+        resolution = Resolution(self.provider, self.reporter)
+        state = resolution.resolve(requirements, max_rounds=max_rounds)
+        return _build_result(state)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/structs.py b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/structs.py
new file mode 100644
index 0000000..93d1568
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/resolvelib/structs.py
@@ -0,0 +1,165 @@
+import itertools
+
+from .compat import collections_abc
+
+
+class DirectedGraph(object):
+    """A graph structure with directed edges."""
+
+    def __init__(self):
+        self._vertices = set()
+        self._forwards = {}  # <key> -> Set[<key>]
+        self._backwards = {}  # <key> -> Set[<key>]
+
+    def __iter__(self):
+        return iter(self._vertices)
+
+    def __len__(self):
+        return len(self._vertices)
+
+    def __contains__(self, key):
+        return key in self._vertices
+
+    def copy(self):
+        """Return a shallow copy of this graph."""
+        other = DirectedGraph()
+        other._vertices = set(self._vertices)
+        other._forwards = {k: set(v) for k, v in self._forwards.items()}
+        other._backwards = {k: set(v) for k, v in self._backwards.items()}
+        return other
+
+    def add(self, key):
+        """Add a new vertex to the graph."""
+        if key in self._vertices:
+            raise ValueError("vertex exists")
+        self._vertices.add(key)
+        self._forwards[key] = set()
+        self._backwards[key] = set()
+
+    def remove(self, key):
+        """Remove a vertex from the graph, disconnecting all edges from/to it."""
+        self._vertices.remove(key)
+        for f in self._forwards.pop(key):
+            self._backwards[f].remove(key)
+        for t in self._backwards.pop(key):
+            self._forwards[t].remove(key)
+
+    def connected(self, f, t):
+        return f in self._backwards[t] and t in self._forwards[f]
+
+    def connect(self, f, t):
+        """Connect two existing vertices.
+
+        Nothing happens if the vertices are already connected.
+        """
+        if t not in self._vertices:
+            raise KeyError(t)
+        self._forwards[f].add(t)
+        self._backwards[t].add(f)
+
+    def iter_edges(self):
+        for f, children in self._forwards.items():
+            for t in children:
+                yield f, t
+
+    def iter_children(self, key):
+        return iter(self._forwards[key])
+
+    def iter_parents(self, key):
+        return iter(self._backwards[key])
+
+
+class IteratorMapping(collections_abc.Mapping):
+    def __init__(self, mapping, accessor, appends=None):
+        self._mapping = mapping
+        self._accessor = accessor
+        self._appends = appends or {}
+
+    def __repr__(self):
+        return "IteratorMapping({!r}, {!r}, {!r})".format(
+            self._mapping,
+            self._accessor,
+            self._appends,
+        )
+
+    def __bool__(self):
+        return bool(self._mapping or self._appends)
+
+    __nonzero__ = __bool__  # XXX: Python 2.
+
+    def __contains__(self, key):
+        return key in self._mapping or key in self._appends
+
+    def __getitem__(self, k):
+        try:
+            v = self._mapping[k]
+        except KeyError:
+            return iter(self._appends[k])
+        return itertools.chain(self._accessor(v), self._appends.get(k, ()))
+
+    def __iter__(self):
+        more = (k for k in self._appends if k not in self._mapping)
+        return itertools.chain(self._mapping, more)
+
+    def __len__(self):
+        more = sum(1 for k in self._appends if k not in self._mapping)
+        return len(self._mapping) + more
+
+
+class _FactoryIterableView(object):
+    """Wrap an iterator factory returned by `find_matches()`.
+
+    Calling `iter()` on this class would invoke the underlying iterator
+    factory, making it a "collection with ordering" that can be iterated
+    through multiple times, but lacks random access methods presented in
+    built-in Python sequence types.
+    """
+
+    def __init__(self, factory):
+        self._factory = factory
+
+    def __repr__(self):
+        return "{}({})".format(type(self).__name__, list(self._factory()))
+
+    def __bool__(self):
+        try:
+            next(self._factory())
+        except StopIteration:
+            return False
+        return True
+
+    __nonzero__ = __bool__  # XXX: Python 2.
+
+    def __iter__(self):
+        return self._factory()
+
+
+class _SequenceIterableView(object):
+    """Wrap an iterable returned by find_matches().
+
+    This is essentially just a proxy to the underlying sequence that provides
+    the same interface as `_FactoryIterableView`.
+    """
+
+    def __init__(self, sequence):
+        self._sequence = sequence
+
+    def __repr__(self):
+        return "{}({})".format(type(self).__name__, self._sequence)
+
+    def __bool__(self):
+        return bool(self._sequence)
+
+    __nonzero__ = __bool__  # XXX: Python 2.
+
+    def __iter__(self):
+        return iter(self._sequence)
+
+
+def build_iter_view(matches):
+    """Build an iterable view from the value returned by `find_matches()`."""
+    if callable(matches):
+        return _FactoryIterableView(matches)
+    if not isinstance(matches, collections_abc.Sequence):
+        matches = list(matches)
+    return _SequenceIterableView(matches)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__init__.py
new file mode 100644
index 0000000..d35875d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__init__.py
@@ -0,0 +1,176 @@
+"""Rich text and beautiful formatting in the terminal."""
+
+import os
+from typing import IO, TYPE_CHECKING, Any, Callable, Optional, Union
+
+from ._extension import load_ipython_extension  # noqa: F401
+
+__all__ = ["get_console", "reconfigure", "print", "inspect"]
+
+if TYPE_CHECKING:
+    from .console import Console
+
+# Global console used by alternative print
+_console: Optional["Console"] = None
+
+try:
+    _IMPORT_CWD = os.path.abspath(os.getcwd())
+except FileNotFoundError:
+    # Can happen if the cwd has been deleted
+    _IMPORT_CWD = ""
+
+
+def get_console() -> "Console":
+    """Get a global :class:`~rich.console.Console` instance. This function is used when Rich requires a Console,
+    and hasn't been explicitly given one.
+
+    Returns:
+        Console: A console instance.
+    """
+    global _console
+    if _console is None:
+        from .console import Console
+
+        _console = Console()
+
+    return _console
+
+
+def reconfigure(*args: Any, **kwargs: Any) -> None:
+    """Reconfigures the global console by replacing it with another.
+
+    Args:
+        console (Console): Replacement console instance.
+    """
+    from pip._vendor.rich.console import Console
+
+    new_console = Console(*args, **kwargs)
+    _console = get_console()
+    _console.__dict__ = new_console.__dict__
+
+
+def print(
+    *objects: Any,
+    sep: str = " ",
+    end: str = "\n",
+    file: Optional[IO[str]] = None,
+    flush: bool = False,
+) -> None:
+    r"""Print object(s) supplied via positional arguments.
+    This function has an identical signature to the built-in print.
+    For more advanced features, see the :class:`~rich.console.Console` class.
+
+    Args:
+        sep (str, optional): Separator between printed objects. Defaults to " ".
+        end (str, optional): Character to write at end of output. Defaults to "\\n".
+        file (IO[str], optional): File to write to, or None for stdout. Defaults to None.
+        flush (bool, optional): Has no effect as Rich always flushes output. Defaults to False.
+
+    """
+    from .console import Console
+
+    write_console = get_console() if file is None else Console(file=file)
+    return write_console.print(*objects, sep=sep, end=end)
+
+
+def print_json(
+    json: Optional[str] = None,
+    *,
+    data: Any = None,
+    indent: Union[None, int, str] = 2,
+    highlight: bool = True,
+    skip_keys: bool = False,
+    ensure_ascii: bool = True,
+    check_circular: bool = True,
+    allow_nan: bool = True,
+    default: Optional[Callable[[Any], Any]] = None,
+    sort_keys: bool = False,
+) -> None:
+    """Pretty prints JSON. Output will be valid JSON.
+
+    Args:
+        json (str): A string containing JSON.
+        data (Any): If json is not supplied, then encode this data.
+        indent (int, optional): Number of spaces to indent. Defaults to 2.
+        highlight (bool, optional): Enable highlighting of output: Defaults to True.
+        skip_keys (bool, optional): Skip keys not of a basic type. Defaults to False.
+        ensure_ascii (bool, optional): Escape all non-ascii characters. Defaults to False.
+        check_circular (bool, optional): Check for circular references. Defaults to True.
+        allow_nan (bool, optional): Allow NaN and Infinity values. Defaults to True.
+        default (Callable, optional): A callable that converts values that can not be encoded
+            in to something that can be JSON encoded. Defaults to None.
+        sort_keys (bool, optional): Sort dictionary keys. Defaults to False.
+    """
+
+    get_console().print_json(
+        json,
+        data=data,
+        indent=indent,
+        highlight=highlight,
+        skip_keys=skip_keys,
+        ensure_ascii=ensure_ascii,
+        check_circular=check_circular,
+        allow_nan=allow_nan,
+        default=default,
+        sort_keys=sort_keys,
+    )
+
+
+def inspect(
+    obj: Any,
+    *,
+    console: Optional["Console"] = None,
+    title: Optional[str] = None,
+    help: bool = False,
+    methods: bool = False,
+    docs: bool = True,
+    private: bool = False,
+    dunder: bool = False,
+    sort: bool = True,
+    all: bool = False,
+    value: bool = True,
+) -> None:
+    """Inspect any Python object.
+
+    * inspect(<OBJECT>) to see summarized info.
+    * inspect(<OBJECT>, methods=True) to see methods.
+    * inspect(<OBJECT>, help=True) to see full (non-abbreviated) help.
+    * inspect(<OBJECT>, private=True) to see private attributes (single underscore).
+    * inspect(<OBJECT>, dunder=True) to see attributes beginning with double underscore.
+    * inspect(<OBJECT>, all=True) to see all attributes.
+
+    Args:
+        obj (Any): An object to inspect.
+        title (str, optional): Title to display over inspect result, or None use type. Defaults to None.
+        help (bool, optional): Show full help text rather than just first paragraph. Defaults to False.
+        methods (bool, optional): Enable inspection of callables. Defaults to False.
+        docs (bool, optional): Also render doc strings. Defaults to True.
+        private (bool, optional): Show private attributes (beginning with underscore). Defaults to False.
+        dunder (bool, optional): Show attributes starting with double underscore. Defaults to False.
+        sort (bool, optional): Sort attributes alphabetically. Defaults to True.
+        all (bool, optional): Show all attributes. Defaults to False.
+        value (bool, optional): Pretty print value. Defaults to True.
+    """
+    _console = console or get_console()
+    from pip._vendor.rich._inspect import Inspect
+
+    # Special case for inspect(inspect)
+    is_inspect = obj is inspect
+
+    _inspect = Inspect(
+        obj,
+        title=title,
+        help=is_inspect or help,
+        methods=is_inspect or methods,
+        docs=is_inspect or docs,
+        private=private,
+        dunder=dunder,
+        sort=sort,
+        all=all,
+        value=value,
+    )
+    _console.print(_inspect)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    print("Hello, **World**")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/__main__.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__main__.py
new file mode 100644
index 0000000..54e6d5e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__main__.py
@@ -0,0 +1,282 @@
+import colorsys
+import io
+from time import process_time
+
+from pip._vendor.rich import box
+from pip._vendor.rich.color import Color
+from pip._vendor.rich.console import Console, ConsoleOptions, Group, RenderableType, RenderResult
+from pip._vendor.rich.markdown import Markdown
+from pip._vendor.rich.measure import Measurement
+from pip._vendor.rich.pretty import Pretty
+from pip._vendor.rich.segment import Segment
+from pip._vendor.rich.style import Style
+from pip._vendor.rich.syntax import Syntax
+from pip._vendor.rich.table import Table
+from pip._vendor.rich.text import Text
+
+
+class ColorBox:
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        for y in range(0, 5):
+            for x in range(options.max_width):
+                h = x / options.max_width
+                l = 0.1 + ((y / 5) * 0.7)
+                r1, g1, b1 = colorsys.hls_to_rgb(h, l, 1.0)
+                r2, g2, b2 = colorsys.hls_to_rgb(h, l + 0.7 / 10, 1.0)
+                bgcolor = Color.from_rgb(r1 * 255, g1 * 255, b1 * 255)
+                color = Color.from_rgb(r2 * 255, g2 * 255, b2 * 255)
+                yield Segment("▄", Style(color=color, bgcolor=bgcolor))
+            yield Segment.line()
+
+    def __rich_measure__(
+        self, console: "Console", options: ConsoleOptions
+    ) -> Measurement:
+        return Measurement(1, options.max_width)
+
+
+def make_test_card() -> Table:
+    """Get a renderable that demonstrates a number of features."""
+    table = Table.grid(padding=1, pad_edge=True)
+    table.title = "Rich features"
+    table.add_column("Feature", no_wrap=True, justify="center", style="bold red")
+    table.add_column("Demonstration")
+
+    color_table = Table(
+        box=None,
+        expand=False,
+        show_header=False,
+        show_edge=False,
+        pad_edge=False,
+    )
+    color_table.add_row(
+        (
+            "✓ [bold green]4-bit color[/]\n"
+            "✓ [bold blue]8-bit color[/]\n"
+            "✓ [bold magenta]Truecolor (16.7 million)[/]\n"
+            "✓ [bold yellow]Dumb terminals[/]\n"
+            "✓ [bold cyan]Automatic color conversion"
+        ),
+        ColorBox(),
+    )
+
+    table.add_row("Colors", color_table)
+
+    table.add_row(
+        "Styles",
+        "All ansi styles: [bold]bold[/], [dim]dim[/], [italic]italic[/italic], [underline]underline[/], [strike]strikethrough[/], [reverse]reverse[/], and even [blink]blink[/].",
+    )
+
+    lorem = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Quisque in metus sed sapien ultricies pretium a at justo. Maecenas luctus velit et auctor maximus."
+    lorem_table = Table.grid(padding=1, collapse_padding=True)
+    lorem_table.pad_edge = False
+    lorem_table.add_row(
+        Text(lorem, justify="left", style="green"),
+        Text(lorem, justify="center", style="yellow"),
+        Text(lorem, justify="right", style="blue"),
+        Text(lorem, justify="full", style="red"),
+    )
+    table.add_row(
+        "Text",
+        Group(
+            Text.from_markup(
+                """Word wrap text. Justify [green]left[/], [yellow]center[/], [blue]right[/] or [red]full[/].\n"""
+            ),
+            lorem_table,
+        ),
+    )
+
+    def comparison(renderable1: RenderableType, renderable2: RenderableType) -> Table:
+        table = Table(show_header=False, pad_edge=False, box=None, expand=True)
+        table.add_column("1", ratio=1)
+        table.add_column("2", ratio=1)
+        table.add_row(renderable1, renderable2)
+        return table
+
+    table.add_row(
+        "Asian\nlanguage\nsupport",
+        ":flag_for_china:  该库支持中文，日文和韩文文本！\n:flag_for_japan:  ライブラリは中国語、日本語、韓国語のテキストをサポートしています\n:flag_for_south_korea:  이 라이브러리는 중국어, 일본어 및 한국어 텍스트를 지원합니다",
+    )
+
+    markup_example = (
+        "[bold magenta]Rich[/] supports a simple [i]bbcode[/i]-like [b]markup[/b] for [yellow]color[/], [underline]style[/], and emoji! "
+        ":+1: :apple: :ant: :bear: :baguette_bread: :bus: "
+    )
+    table.add_row("Markup", markup_example)
+
+    example_table = Table(
+        show_edge=False,
+        show_header=True,
+        expand=False,
+        row_styles=["none", "dim"],
+        box=box.SIMPLE,
+    )
+    example_table.add_column("[green]Date", style="green", no_wrap=True)
+    example_table.add_column("[blue]Title", style="blue")
+    example_table.add_column(
+        "[cyan]Production Budget",
+        style="cyan",
+        justify="right",
+        no_wrap=True,
+    )
+    example_table.add_column(
+        "[magenta]Box Office",
+        style="magenta",
+        justify="right",
+        no_wrap=True,
+    )
+    example_table.add_row(
+        "Dec 20, 2019",
+        "Star Wars: The Rise of Skywalker",
+        "$275,000,000",
+        "$375,126,118",
+    )
+    example_table.add_row(
+        "May 25, 2018",
+        "[b]Solo[/]: A Star Wars Story",
+        "$275,000,000",
+        "$393,151,347",
+    )
+    example_table.add_row(
+        "Dec 15, 2017",
+        "Star Wars Ep. VIII: The Last Jedi",
+        "$262,000,000",
+        "[bold]$1,332,539,889[/bold]",
+    )
+    example_table.add_row(
+        "May 19, 1999",
+        "Star Wars Ep. [b]I[/b]: [i]The phantom Menace",
+        "$115,000,000",
+        "$1,027,044,677",
+    )
+
+    table.add_row("Tables", example_table)
+
+    code = '''\
+def iter_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value'''
+
+    pretty_data = {
+        "foo": [
+            3.1427,
+            (
+                "Paul Atreides",
+                "Vladimir Harkonnen",
+                "Thufir Hawat",
+            ),
+        ],
+        "atomic": (False, True, None),
+    }
+    table.add_row(
+        "Syntax\nhighlighting\n&\npretty\nprinting",
+        comparison(
+            Syntax(code, "python3", line_numbers=True, indent_guides=True),
+            Pretty(pretty_data, indent_guides=True),
+        ),
+    )
+
+    markdown_example = """\
+# Markdown
+
+Supports much of the *markdown* __syntax__!
+
+- Headers
+- Basic formatting: **bold**, *italic*, `code`
+- Block quotes
+- Lists, and more...
+    """
+    table.add_row(
+        "Markdown", comparison("[cyan]" + markdown_example, Markdown(markdown_example))
+    )
+
+    table.add_row(
+        "+more!",
+        """Progress bars, columns, styled logging handler, tracebacks, etc...""",
+    )
+    return table
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    console = Console(
+        file=io.StringIO(),
+        force_terminal=True,
+    )
+    test_card = make_test_card()
+
+    # Print once to warm cache
+    start = process_time()
+    console.print(test_card)
+    pre_cache_taken = round((process_time() - start) * 1000.0, 1)
+
+    console.file = io.StringIO()
+
+    start = process_time()
+    console.print(test_card)
+    taken = round((process_time() - start) * 1000.0, 1)
+
+    c = Console(record=True)
+    c.print(test_card)
+    # c.save_svg(
+    #     path="/Users/darrenburns/Library/Application Support/JetBrains/PyCharm2021.3/scratches/svg_export.svg",
+    #     title="Rich can export to SVG",
+    # )
+
+    print(f"rendered in {pre_cache_taken}ms (cold cache)")
+    print(f"rendered in {taken}ms (warm cache)")
+
+    from pip._vendor.rich.panel import Panel
+
+    console = Console()
+
+    sponsor_message = Table.grid(padding=1)
+    sponsor_message.add_column(style="green", justify="right")
+    sponsor_message.add_column(no_wrap=True)
+
+    sponsor_message.add_row(
+        "Textualize",
+        "[u blue link=https://github.com/textualize]https://github.com/textualize",
+    )
+    sponsor_message.add_row(
+        "Buy devs a :coffee:",
+        "[u blue link=https://ko-fi.com/textualize]https://ko-fi.com/textualize",
+    )
+    sponsor_message.add_row(
+        "Twitter",
+        "[u blue link=https://twitter.com/willmcgugan]https://twitter.com/willmcgugan",
+    )
+
+    intro_message = Text.from_markup(
+        """\
+We hope you enjoy using Rich!
+
+Rich is maintained with [red]:heart:[/] by [link=https://www.textualize.io]Textualize.io[/]
+
+- Will McGugan"""
+    )
+
+    message = Table.grid(padding=2)
+    message.add_column()
+    message.add_column(no_wrap=True)
+    message.add_row(intro_message, sponsor_message)
+
+    console.print(
+        Panel.fit(
+            message,
+            box=box.ROUNDED,
+            padding=(1, 2),
+            title="[b red]Thanks for trying out Rich!",
+            border_style="bright_blue",
+        ),
+        justify="center",
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..e451ec5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/__pycache__/__init__.cpython-39.pyc
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+    (122918, 122922, 0),
+    (123184, 123190, 0),
+    (123628, 123631, 0),
+    (125136, 125142, 0),
+    (125252, 125258, 0),
+    (126980, 126980, 2),
+    (127183, 127183, 2),
+    (127374, 127374, 2),
+    (127377, 127386, 2),
+    (127488, 127490, 2),
+    (127504, 127547, 2),
+    (127552, 127560, 2),
+    (127568, 127569, 2),
+    (127584, 127589, 2),
+    (127744, 127776, 2),
+    (127789, 127797, 2),
+    (127799, 127868, 2),
+    (127870, 127891, 2),
+    (127904, 127946, 2),
+    (127951, 127955, 2),
+    (127968, 127984, 2),
+    (127988, 127988, 2),
+    (127992, 128062, 2),
+    (128064, 128064, 2),
+    (128066, 128252, 2),
+    (128255, 128317, 2),
+    (128331, 128334, 2),
+    (128336, 128359, 2),
+    (128378, 128378, 2),
+    (128405, 128406, 2),
+    (128420, 128420, 2),
+    (128507, 128591, 2),
+    (128640, 128709, 2),
+    (128716, 128716, 2),
+    (128720, 128722, 2),
+    (128725, 128727, 2),
+    (128747, 128748, 2),
+    (128756, 128764, 2),
+    (128992, 129003, 2),
+    (129292, 129338, 2),
+    (129340, 129349, 2),
+    (129351, 129400, 2),
+    (129402, 129483, 2),
+    (129485, 129535, 2),
+    (129648, 129652, 2),
+    (129656, 129658, 2),
+    (129664, 129670, 2),
+    (129680, 129704, 2),
+    (129712, 129718, 2),
+    (129728, 129730, 2),
+    (129744, 129750, 2),
+    (131072, 196605, 2),
+    (196608, 262141, 2),
+    (917760, 917999, 0),
+]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_codes.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_codes.py
new file mode 100644
index 0000000..1f2877b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_codes.py
@@ -0,0 +1,3610 @@
+EMOJI = {
+    "1st_place_medal": "🥇",
+    "2nd_place_medal": "🥈",
+    "3rd_place_medal": "🥉",
+    "ab_button_(blood_type)": "🆎",
+    "atm_sign": "🏧",
+    "a_button_(blood_type)": "🅰",
+    "afghanistan": "🇦🇫",
+    "albania": "🇦🇱",
+    "algeria": "🇩🇿",
+    "american_samoa": "🇦🇸",
+    "andorra": "🇦🇩",
+    "angola": "🇦🇴",
+    "anguilla": "🇦🇮",
+    "antarctica": "🇦🇶",
+    "antigua_&_barbuda": "🇦🇬",
+    "aquarius": "♒",
+    "argentina": "🇦🇷",
+    "aries": "♈",
+    "armenia": "🇦🇲",
+    "aruba": "🇦🇼",
+    "ascension_island": "🇦🇨",
+    "australia": "🇦🇺",
+    "austria": "🇦🇹",
+    "azerbaijan": "🇦🇿",
+    "back_arrow": "🔙",
+    "b_button_(blood_type)": "🅱",
+    "bahamas": "🇧🇸",
+    "bahrain": "🇧🇭",
+    "bangladesh": "🇧🇩",
+    "barbados": "🇧🇧",
+    "belarus": "🇧🇾",
+    "belgium": "🇧🇪",
+    "belize": "🇧🇿",
+    "benin": "🇧🇯",
+    "bermuda": "🇧🇲",
+    "bhutan": "🇧🇹",
+    "bolivia": "🇧🇴",
+    "bosnia_&_herzegovina": "🇧🇦",
+    "botswana": "🇧🇼",
+    "bouvet_island": "🇧🇻",
+    "brazil": "🇧🇷",
+    "british_indian_ocean_territory": "🇮🇴",
+    "british_virgin_islands": "🇻🇬",
+    "brunei": "🇧🇳",
+    "bulgaria": "🇧🇬",
+    "burkina_faso": "🇧🇫",
+    "burundi": "🇧🇮",
+    "cl_button": "🆑",
+    "cool_button": "🆒",
+    "cambodia": "🇰🇭",
+    "cameroon": "🇨🇲",
+    "canada": "🇨🇦",
+    "canary_islands": "🇮🇨",
+    "cancer": "♋",
+    "cape_verde": "🇨🇻",
+    "capricorn": "♑",
+    "caribbean_netherlands": "🇧🇶",
+    "cayman_islands": "🇰🇾",
+    "central_african_republic": "🇨🇫",
+    "ceuta_&_melilla": "🇪🇦",
+    "chad": "🇹🇩",
+    "chile": "🇨🇱",
+    "china": "🇨🇳",
+    "christmas_island": "🇨🇽",
+    "christmas_tree": "🎄",
+    "clipperton_island": "🇨🇵",
+    "cocos_(keeling)_islands": "🇨🇨",
+    "colombia": "🇨🇴",
+    "comoros": "🇰🇲",
+    "congo_-_brazzaville": "🇨🇬",
+    "congo_-_kinshasa": "🇨🇩",
+    "cook_islands": "🇨🇰",
+    "costa_rica": "🇨🇷",
+    "croatia": "🇭🇷",
+    "cuba": "🇨🇺",
+    "curaçao": "🇨🇼",
+    "cyprus": "🇨🇾",
+    "czechia": "🇨🇿",
+    "côte_d’ivoire": "🇨🇮",
+    "denmark": "🇩🇰",
+    "diego_garcia": "🇩🇬",
+    "djibouti": "🇩🇯",
+    "dominica": "🇩🇲",
+    "dominican_republic": "🇩🇴",
+    "end_arrow": "🔚",
+    "ecuador": "🇪🇨",
+    "egypt": "🇪🇬",
+    "el_salvador": "🇸🇻",
+    "england": "🏴\U000e0067\U000e0062\U000e0065\U000e006e\U000e0067\U000e007f",
+    "equatorial_guinea": "🇬🇶",
+    "eritrea": "🇪🇷",
+    "estonia": "🇪🇪",
+    "ethiopia": "🇪🇹",
+    "european_union": "🇪🇺",
+    "free_button": "🆓",
+    "falkland_islands": "🇫🇰",
+    "faroe_islands": "🇫🇴",
+    "fiji": "🇫🇯",
+    "finland": "🇫🇮",
+    "france": "🇫🇷",
+    "french_guiana": "🇬🇫",
+    "french_polynesia": "🇵🇫",
+    "french_southern_territories": "🇹🇫",
+    "gabon": "🇬🇦",
+    "gambia": "🇬🇲",
+    "gemini": "♊",
+    "georgia": "🇬🇪",
+    "germany": "🇩🇪",
+    "ghana": "🇬🇭",
+    "gibraltar": "🇬🇮",
+    "greece": "🇬🇷",
+    "greenland": "🇬🇱",
+    "grenada": "🇬🇩",
+    "guadeloupe": "🇬🇵",
+    "guam": "🇬🇺",
+    "guatemala": "🇬🇹",
+    "guernsey": "🇬🇬",
+    "guinea": "🇬🇳",
+    "guinea-bissau": "🇬🇼",
+    "guyana": "🇬🇾",
+    "haiti": "🇭🇹",
+    "heard_&_mcdonald_islands": "🇭🇲",
+    "honduras": "🇭🇳",
+    "hong_kong_sar_china": "🇭🇰",
+    "hungary": "🇭🇺",
+    "id_button": "🆔",
+    "iceland": "🇮🇸",
+    "india": "🇮🇳",
+    "indonesia": "🇮🇩",
+    "iran": "🇮🇷",
+    "iraq": "🇮🇶",
+    "ireland": "🇮🇪",
+    "isle_of_man": "🇮🇲",
+    "israel": "🇮🇱",
+    "italy": "🇮🇹",
+    "jamaica": "🇯🇲",
+    "japan": "🗾",
+    "japanese_acceptable_button": "🉑",
+    "japanese_application_button": "🈸",
+    "japanese_bargain_button": "🉐",
+    "japanese_castle": "🏯",
+    "japanese_congratulations_button": "㊗",
+    "japanese_discount_button": "🈹",
+    "japanese_dolls": "🎎",
+    "japanese_free_of_charge_button": "🈚",
+    "japanese_here_button": "🈁",
+    "japanese_monthly_amount_button": "🈷",
+    "japanese_no_vacancy_button": "🈵",
+    "japanese_not_free_of_charge_button": "🈶",
+    "japanese_open_for_business_button": "🈺",
+    "japanese_passing_grade_button": "🈴",
+    "japanese_post_office": "🏣",
+    "japanese_prohibited_button": "🈲",
+    "japanese_reserved_button": "🈯",
+    "japanese_secret_button": "㊙",
+    "japanese_service_charge_button": "🈂",
+    "japanese_symbol_for_beginner": "🔰",
+    "japanese_vacancy_button": "🈳",
+    "jersey": "🇯🇪",
+    "jordan": "🇯🇴",
+    "kazakhstan": "🇰🇿",
+    "kenya": "🇰🇪",
+    "kiribati": "🇰🇮",
+    "kosovo": "🇽🇰",
+    "kuwait": "🇰🇼",
+    "kyrgyzstan": "🇰🇬",
+    "laos": "🇱🇦",
+    "latvia": "🇱🇻",
+    "lebanon": "🇱🇧",
+    "leo": "♌",
+    "lesotho": "🇱🇸",
+    "liberia": "🇱🇷",
+    "libra": "♎",
+    "libya": "🇱🇾",
+    "liechtenstein": "🇱🇮",
+    "lithuania": "🇱🇹",
+    "luxembourg": "🇱🇺",
+    "macau_sar_china": "🇲🇴",
+    "macedonia": "🇲🇰",
+    "madagascar": "🇲🇬",
+    "malawi": "🇲🇼",
+    "malaysia": "🇲🇾",
+    "maldives": "🇲🇻",
+    "mali": "🇲🇱",
+    "malta": "🇲🇹",
+    "marshall_islands": "🇲🇭",
+    "martinique": "🇲🇶",
+    "mauritania": "🇲🇷",
+    "mauritius": "🇲🇺",
+    "mayotte": "🇾🇹",
+    "mexico": "🇲🇽",
+    "micronesia": "🇫🇲",
+    "moldova": "🇲🇩",
+    "monaco": "🇲🇨",
+    "mongolia": "🇲🇳",
+    "montenegro": "🇲🇪",
+    "montserrat": "🇲🇸",
+    "morocco": "🇲🇦",
+    "mozambique": "🇲🇿",
+    "mrs._claus": "🤶",
+    "mrs._claus_dark_skin_tone": "🤶🏿",
+    "mrs._claus_light_skin_tone": "🤶🏻",
+    "mrs._claus_medium-dark_skin_tone": "🤶🏾",
+    "mrs._claus_medium-light_skin_tone": "🤶🏼",
+    "mrs._claus_medium_skin_tone": "🤶🏽",
+    "myanmar_(burma)": "🇲🇲",
+    "new_button": "🆕",
+    "ng_button": "🆖",
+    "namibia": "🇳🇦",
+    "nauru": "🇳🇷",
+    "nepal": "🇳🇵",
+    "netherlands": "🇳🇱",
+    "new_caledonia": "🇳🇨",
+    "new_zealand": "🇳🇿",
+    "nicaragua": "🇳🇮",
+    "niger": "🇳🇪",
+    "nigeria": "🇳🇬",
+    "niue": "🇳🇺",
+    "norfolk_island": "🇳🇫",
+    "north_korea": "🇰🇵",
+    "northern_mariana_islands": "🇲🇵",
+    "norway": "🇳🇴",
+    "ok_button": "🆗",
+    "ok_hand": "👌",
+    "ok_hand_dark_skin_tone": "👌🏿",
+    "ok_hand_light_skin_tone": "👌🏻",
+    "ok_hand_medium-dark_skin_tone": "👌🏾",
+    "ok_hand_medium-light_skin_tone": "👌🏼",
+    "ok_hand_medium_skin_tone": "👌🏽",
+    "on!_arrow": "🔛",
+    "o_button_(blood_type)": "🅾",
+    "oman": "🇴🇲",
+    "ophiuchus": "⛎",
+    "p_button": "🅿",
+    "pakistan": "🇵🇰",
+    "palau": "🇵🇼",
+    "palestinian_territories": "🇵🇸",
+    "panama": "🇵🇦",
+    "papua_new_guinea": "🇵🇬",
+    "paraguay": "🇵🇾",
+    "peru": "🇵🇪",
+    "philippines": "🇵🇭",
+    "pisces": "♓",
+    "pitcairn_islands": "🇵🇳",
+    "poland": "🇵🇱",
+    "portugal": "🇵🇹",
+    "puerto_rico": "🇵🇷",
+    "qatar": "🇶🇦",
+    "romania": "🇷🇴",
+    "russia": "🇷🇺",
+    "rwanda": "🇷🇼",
+    "réunion": "🇷🇪",
+    "soon_arrow": "🔜",
+    "sos_button": "🆘",
+    "sagittarius": "♐",
+    "samoa": "🇼🇸",
+    "san_marino": "🇸🇲",
+    "santa_claus": "🎅",
+    "santa_claus_dark_skin_tone": "🎅🏿",
+    "santa_claus_light_skin_tone": "🎅🏻",
+    "santa_claus_medium-dark_skin_tone": "🎅🏾",
+    "santa_claus_medium-light_skin_tone": "🎅🏼",
+    "santa_claus_medium_skin_tone": "🎅🏽",
+    "saudi_arabia": "🇸🇦",
+    "scorpio": "♏",
+    "scotland": "🏴\U000e0067\U000e0062\U000e0073\U000e0063\U000e0074\U000e007f",
+    "senegal": "🇸🇳",
+    "serbia": "🇷🇸",
+    "seychelles": "🇸🇨",
+    "sierra_leone": "🇸🇱",
+    "singapore": "🇸🇬",
+    "sint_maarten": "🇸🇽",
+    "slovakia": "🇸🇰",
+    "slovenia": "🇸🇮",
+    "solomon_islands": "🇸🇧",
+    "somalia": "🇸🇴",
+    "south_africa": "🇿🇦",
+    "south_georgia_&_south_sandwich_islands": "🇬🇸",
+    "south_korea": "🇰🇷",
+    "south_sudan": "🇸🇸",
+    "spain": "🇪🇸",
+    "sri_lanka": "🇱🇰",
+    "st._barthélemy": "🇧🇱",
+    "st._helena": "🇸🇭",
+    "st._kitts_&_nevis": "🇰🇳",
+    "st._lucia": "🇱🇨",
+    "st._martin": "🇲🇫",
+    "st._pierre_&_miquelon": "🇵🇲",
+    "st._vincent_&_grenadines": "🇻🇨",
+    "statue_of_liberty": "🗽",
+    "sudan": "🇸🇩",
+    "suriname": "🇸🇷",
+    "svalbard_&_jan_mayen": "🇸🇯",
+    "swaziland": "🇸🇿",
+    "sweden": "🇸🇪",
+    "switzerland": "🇨🇭",
+    "syria": "🇸🇾",
+    "são_tomé_&_príncipe": "🇸🇹",
+    "t-rex": "🦖",
+    "top_arrow": "🔝",
+    "taiwan": "🇹🇼",
+    "tajikistan": "🇹🇯",
+    "tanzania": "🇹🇿",
+    "taurus": "♉",
+    "thailand": "🇹🇭",
+    "timor-leste": "🇹🇱",
+    "togo": "🇹🇬",
+    "tokelau": "🇹🇰",
+    "tokyo_tower": "🗼",
+    "tonga": "🇹🇴",
+    "trinidad_&_tobago": "🇹🇹",
+    "tristan_da_cunha": "🇹🇦",
+    "tunisia": "🇹🇳",
+    "turkey": "🦃",
+    "turkmenistan": "🇹🇲",
+    "turks_&_caicos_islands": "🇹🇨",
+    "tuvalu": "🇹🇻",
+    "u.s._outlying_islands": "🇺🇲",
+    "u.s._virgin_islands": "🇻🇮",
+    "up!_button": "🆙",
+    "uganda": "🇺🇬",
+    "ukraine": "🇺🇦",
+    "united_arab_emirates": "🇦🇪",
+    "united_kingdom": "🇬🇧",
+    "united_nations": "🇺🇳",
+    "united_states": "🇺🇸",
+    "uruguay": "🇺🇾",
+    "uzbekistan": "🇺🇿",
+    "vs_button": "🆚",
+    "vanuatu": "🇻🇺",
+    "vatican_city": "🇻🇦",
+    "venezuela": "🇻🇪",
+    "vietnam": "🇻🇳",
+    "virgo": "♍",
+    "wales": "🏴\U000e0067\U000e0062\U000e0077\U000e006c\U000e0073\U000e007f",
+    "wallis_&_futuna": "🇼🇫",
+    "western_sahara": "🇪🇭",
+    "yemen": "🇾🇪",
+    "zambia": "🇿🇲",
+    "zimbabwe": "🇿🇼",
+    "abacus": "🧮",
+    "adhesive_bandage": "🩹",
+    "admission_tickets": "🎟",
+    "adult": "🧑",
+    "adult_dark_skin_tone": "🧑🏿",
+    "adult_light_skin_tone": "🧑🏻",
+    "adult_medium-dark_skin_tone": "🧑🏾",
+    "adult_medium-light_skin_tone": "🧑🏼",
+    "adult_medium_skin_tone": "🧑🏽",
+    "aerial_tramway": "🚡",
+    "airplane": "✈",
+    "airplane_arrival": "🛬",
+    "airplane_departure": "🛫",
+    "alarm_clock": "⏰",
+    "alembic": "⚗",
+    "alien": "👽",
+    "alien_monster": "👾",
+    "ambulance": "🚑",
+    "american_football": "🏈",
+    "amphora": "🏺",
+    "anchor": "⚓",
+    "anger_symbol": "💢",
+    "angry_face": "😠",
+    "angry_face_with_horns": "👿",
+    "anguished_face": "😧",
+    "ant": "🐜",
+    "antenna_bars": "📶",
+    "anxious_face_with_sweat": "😰",
+    "articulated_lorry": "🚛",
+    "artist_palette": "🎨",
+    "astonished_face": "😲",
+    "atom_symbol": "⚛",
+    "auto_rickshaw": "🛺",
+    "automobile": "🚗",
+    "avocado": "🥑",
+    "axe": "🪓",
+    "baby": "👶",
+    "baby_angel": "👼",
+    "baby_angel_dark_skin_tone": "👼🏿",
+    "baby_angel_light_skin_tone": "👼🏻",
+    "baby_angel_medium-dark_skin_tone": "👼🏾",
+    "baby_angel_medium-light_skin_tone": "👼🏼",
+    "baby_angel_medium_skin_tone": "👼🏽",
+    "baby_bottle": "🍼",
+    "baby_chick": "🐤",
+    "baby_dark_skin_tone": "👶🏿",
+    "baby_light_skin_tone": "👶🏻",
+    "baby_medium-dark_skin_tone": "👶🏾",
+    "baby_medium-light_skin_tone": "👶🏼",
+    "baby_medium_skin_tone": "👶🏽",
+    "baby_symbol": "🚼",
+    "backhand_index_pointing_down": "👇",
+    "backhand_index_pointing_down_dark_skin_tone": "👇🏿",
+    "backhand_index_pointing_down_light_skin_tone": "👇🏻",
+    "backhand_index_pointing_down_medium-dark_skin_tone": "👇🏾",
+    "backhand_index_pointing_down_medium-light_skin_tone": "👇🏼",
+    "backhand_index_pointing_down_medium_skin_tone": "👇🏽",
+    "backhand_index_pointing_left": "👈",
+    "backhand_index_pointing_left_dark_skin_tone": "👈🏿",
+    "backhand_index_pointing_left_light_skin_tone": "👈🏻",
+    "backhand_index_pointing_left_medium-dark_skin_tone": "👈🏾",
+    "backhand_index_pointing_left_medium-light_skin_tone": "👈🏼",
+    "backhand_index_pointing_left_medium_skin_tone": "👈🏽",
+    "backhand_index_pointing_right": "👉",
+    "backhand_index_pointing_right_dark_skin_tone": "👉🏿",
+    "backhand_index_pointing_right_light_skin_tone": "👉🏻",
+    "backhand_index_pointing_right_medium-dark_skin_tone": "👉🏾",
+    "backhand_index_pointing_right_medium-light_skin_tone": "👉🏼",
+    "backhand_index_pointing_right_medium_skin_tone": "👉🏽",
+    "backhand_index_pointing_up": "👆",
+    "backhand_index_pointing_up_dark_skin_tone": "👆🏿",
+    "backhand_index_pointing_up_light_skin_tone": "👆🏻",
+    "backhand_index_pointing_up_medium-dark_skin_tone": "👆🏾",
+    "backhand_index_pointing_up_medium-light_skin_tone": "👆🏼",
+    "backhand_index_pointing_up_medium_skin_tone": "👆🏽",
+    "bacon": "🥓",
+    "badger": "🦡",
+    "badminton": "🏸",
+    "bagel": "🥯",
+    "baggage_claim": "🛄",
+    "baguette_bread": "🥖",
+    "balance_scale": "⚖",
+    "bald": "🦲",
+    "bald_man": "👨\u200d🦲",
+    "bald_woman": "👩\u200d🦲",
+    "ballet_shoes": "🩰",
+    "balloon": "🎈",
+    "ballot_box_with_ballot": "🗳",
+    "ballot_box_with_check": "☑",
+    "banana": "🍌",
+    "banjo": "🪕",
+    "bank": "🏦",
+    "bar_chart": "📊",
+    "barber_pole": "💈",
+    "baseball": "⚾",
+    "basket": "🧺",
+    "basketball": "🏀",
+    "bat": "🦇",
+    "bathtub": "🛁",
+    "battery": "🔋",
+    "beach_with_umbrella": "🏖",
+    "beaming_face_with_smiling_eyes": "😁",
+    "bear_face": "🐻",
+    "bearded_person": "🧔",
+    "bearded_person_dark_skin_tone": "🧔🏿",
+    "bearded_person_light_skin_tone": "🧔🏻",
+    "bearded_person_medium-dark_skin_tone": "🧔🏾",
+    "bearded_person_medium-light_skin_tone": "🧔🏼",
+    "bearded_person_medium_skin_tone": "🧔🏽",
+    "beating_heart": "💓",
+    "bed": "🛏",
+    "beer_mug": "🍺",
+    "bell": "🔔",
+    "bell_with_slash": "🔕",
+    "bellhop_bell": "🛎",
+    "bento_box": "🍱",
+    "beverage_box": "🧃",
+    "bicycle": "🚲",
+    "bikini": "👙",
+    "billed_cap": "🧢",
+    "biohazard": "☣",
+    "bird": "🐦",
+    "birthday_cake": "🎂",
+    "black_circle": "⚫",
+    "black_flag": "🏴",
+    "black_heart": "🖤",
+    "black_large_square": "⬛",
+    "black_medium-small_square": "◾",
+    "black_medium_square": "◼",
+    "black_nib": "✒",
+    "black_small_square": "▪",
+    "black_square_button": "🔲",
+    "blond-haired_man": "👱\u200d♂️",
+    "blond-haired_man_dark_skin_tone": "👱🏿\u200d♂️",
+    "blond-haired_man_light_skin_tone": "👱🏻\u200d♂️",
+    "blond-haired_man_medium-dark_skin_tone": "👱🏾\u200d♂️",
+    "blond-haired_man_medium-light_skin_tone": "👱🏼\u200d♂️",
+    "blond-haired_man_medium_skin_tone": "👱🏽\u200d♂️",
+    "blond-haired_person": "👱",
+    "blond-haired_person_dark_skin_tone": "👱🏿",
+    "blond-haired_person_light_skin_tone": "👱🏻",
+    "blond-haired_person_medium-dark_skin_tone": "👱🏾",
+    "blond-haired_person_medium-light_skin_tone": "👱🏼",
+    "blond-haired_person_medium_skin_tone": "👱🏽",
+    "blond-haired_woman": "👱\u200d♀️",
+    "blond-haired_woman_dark_skin_tone": "👱🏿\u200d♀️",
+    "blond-haired_woman_light_skin_tone": "👱🏻\u200d♀️",
+    "blond-haired_woman_medium-dark_skin_tone": "👱🏾\u200d♀️",
+    "blond-haired_woman_medium-light_skin_tone": "👱🏼\u200d♀️",
+    "blond-haired_woman_medium_skin_tone": "👱🏽\u200d♀️",
+    "blossom": "🌼",
+    "blowfish": "🐡",
+    "blue_book": "📘",
+    "blue_circle": "🔵",
+    "blue_heart": "💙",
+    "blue_square": "🟦",
+    "boar": "🐗",
+    "bomb": "💣",
+    "bone": "🦴",
+    "bookmark": "🔖",
+    "bookmark_tabs": "📑",
+    "books": "📚",
+    "bottle_with_popping_cork": "🍾",
+    "bouquet": "💐",
+    "bow_and_arrow": "🏹",
+    "bowl_with_spoon": "🥣",
+    "bowling": "🎳",
+    "boxing_glove": "🥊",
+    "boy": "👦",
+    "boy_dark_skin_tone": "👦🏿",
+    "boy_light_skin_tone": "👦🏻",
+    "boy_medium-dark_skin_tone": "👦🏾",
+    "boy_medium-light_skin_tone": "👦🏼",
+    "boy_medium_skin_tone": "👦🏽",
+    "brain": "🧠",
+    "bread": "🍞",
+    "breast-feeding": "🤱",
+    "breast-feeding_dark_skin_tone": "🤱🏿",
+    "breast-feeding_light_skin_tone": "🤱🏻",
+    "breast-feeding_medium-dark_skin_tone": "🤱🏾",
+    "breast-feeding_medium-light_skin_tone": "🤱🏼",
+    "breast-feeding_medium_skin_tone": "🤱🏽",
+    "brick": "🧱",
+    "bride_with_veil": "👰",
+    "bride_with_veil_dark_skin_tone": "👰🏿",
+    "bride_with_veil_light_skin_tone": "👰🏻",
+    "bride_with_veil_medium-dark_skin_tone": "👰🏾",
+    "bride_with_veil_medium-light_skin_tone": "👰🏼",
+    "bride_with_veil_medium_skin_tone": "👰🏽",
+    "bridge_at_night": "🌉",
+    "briefcase": "💼",
+    "briefs": "🩲",
+    "bright_button": "🔆",
+    "broccoli": "🥦",
+    "broken_heart": "💔",
+    "broom": "🧹",
+    "brown_circle": "🟤",
+    "brown_heart": "🤎",
+    "brown_square": "🟫",
+    "bug": "🐛",
+    "building_construction": "🏗",
+    "bullet_train": "🚅",
+    "burrito": "🌯",
+    "bus": "🚌",
+    "bus_stop": "🚏",
+    "bust_in_silhouette": "👤",
+    "busts_in_silhouette": "👥",
+    "butter": "🧈",
+    "butterfly": "🦋",
+    "cactus": "🌵",
+    "calendar": "📆",
+    "call_me_hand": "🤙",
+    "call_me_hand_dark_skin_tone": "🤙🏿",
+    "call_me_hand_light_skin_tone": "🤙🏻",
+    "call_me_hand_medium-dark_skin_tone": "🤙🏾",
+    "call_me_hand_medium-light_skin_tone": "🤙🏼",
+    "call_me_hand_medium_skin_tone": "🤙🏽",
+    "camel": "🐫",
+    "camera": "📷",
+    "camera_with_flash": "📸",
+    "camping": "🏕",
+    "candle": "🕯",
+    "candy": "🍬",
+    "canned_food": "🥫",
+    "canoe": "🛶",
+    "card_file_box": "🗃",
+    "card_index": "📇",
+    "card_index_dividers": "🗂",
+    "carousel_horse": "🎠",
+    "carp_streamer": "🎏",
+    "carrot": "🥕",
+    "castle": "🏰",
+    "cat": "🐱",
+    "cat_face": "🐱",
+    "cat_face_with_tears_of_joy": "😹",
+    "cat_face_with_wry_smile": "😼",
+    "chains": "⛓",
+    "chair": "🪑",
+    "chart_decreasing": "📉",
+    "chart_increasing": "📈",
+    "chart_increasing_with_yen": "💹",
+    "cheese_wedge": "🧀",
+    "chequered_flag": "🏁",
+    "cherries": "🍒",
+    "cherry_blossom": "🌸",
+    "chess_pawn": "♟",
+    "chestnut": "🌰",
+    "chicken": "🐔",
+    "child": "🧒",
+    "child_dark_skin_tone": "🧒🏿",
+    "child_light_skin_tone": "🧒🏻",
+    "child_medium-dark_skin_tone": "🧒🏾",
+    "child_medium-light_skin_tone": "🧒🏼",
+    "child_medium_skin_tone": "🧒🏽",
+    "children_crossing": "🚸",
+    "chipmunk": "🐿",
+    "chocolate_bar": "🍫",
+    "chopsticks": "🥢",
+    "church": "⛪",
+    "cigarette": "🚬",
+    "cinema": "🎦",
+    "circled_m": "Ⓜ",
+    "circus_tent": "🎪",
+    "cityscape": "🏙",
+    "cityscape_at_dusk": "🌆",
+    "clamp": "🗜",
+    "clapper_board": "🎬",
+    "clapping_hands": "👏",
+    "clapping_hands_dark_skin_tone": "👏🏿",
+    "clapping_hands_light_skin_tone": "👏🏻",
+    "clapping_hands_medium-dark_skin_tone": "👏🏾",
+    "clapping_hands_medium-light_skin_tone": "👏🏼",
+    "clapping_hands_medium_skin_tone": "👏🏽",
+    "classical_building": "🏛",
+    "clinking_beer_mugs": "🍻",
+    "clinking_glasses": "🥂",
+    "clipboard": "📋",
+    "clockwise_vertical_arrows": "🔃",
+    "closed_book": "📕",
+    "closed_mailbox_with_lowered_flag": "📪",
+    "closed_mailbox_with_raised_flag": "📫",
+    "closed_umbrella": "🌂",
+    "cloud": "☁",
+    "cloud_with_lightning": "🌩",
+    "cloud_with_lightning_and_rain": "⛈",
+    "cloud_with_rain": "🌧",
+    "cloud_with_snow": "🌨",
+    "clown_face": "🤡",
+    "club_suit": "♣",
+    "clutch_bag": "👝",
+    "coat": "🧥",
+    "cocktail_glass": "🍸",
+    "coconut": "🥥",
+    "coffin": "⚰",
+    "cold_face": "🥶",
+    "collision": "💥",
+    "comet": "☄",
+    "compass": "🧭",
+    "computer_disk": "💽",
+    "computer_mouse": "🖱",
+    "confetti_ball": "🎊",
+    "confounded_face": "😖",
+    "confused_face": "😕",
+    "construction": "🚧",
+    "construction_worker": "👷",
+    "construction_worker_dark_skin_tone": "👷🏿",
+    "construction_worker_light_skin_tone": "👷🏻",
+    "construction_worker_medium-dark_skin_tone": "👷🏾",
+    "construction_worker_medium-light_skin_tone": "👷🏼",
+    "construction_worker_medium_skin_tone": "👷🏽",
+    "control_knobs": "🎛",
+    "convenience_store": "🏪",
+    "cooked_rice": "🍚",
+    "cookie": "🍪",
+    "cooking": "🍳",
+    "copyright": "©",
+    "couch_and_lamp": "🛋",
+    "counterclockwise_arrows_button": "🔄",
+    "couple_with_heart": "💑",
+    "couple_with_heart_man_man": "👨\u200d❤️\u200d👨",
+    "couple_with_heart_woman_man": "👩\u200d❤️\u200d👨",
+    "couple_with_heart_woman_woman": "👩\u200d❤️\u200d👩",
+    "cow": "🐮",
+    "cow_face": "🐮",
+    "cowboy_hat_face": "🤠",
+    "crab": "🦀",
+    "crayon": "🖍",
+    "credit_card": "💳",
+    "crescent_moon": "🌙",
+    "cricket": "🦗",
+    "cricket_game": "🏏",
+    "crocodile": "🐊",
+    "croissant": "🥐",
+    "cross_mark": "❌",
+    "cross_mark_button": "❎",
+    "crossed_fingers": "🤞",
+    "crossed_fingers_dark_skin_tone": "🤞🏿",
+    "crossed_fingers_light_skin_tone": "🤞🏻",
+    "crossed_fingers_medium-dark_skin_tone": "🤞🏾",
+    "crossed_fingers_medium-light_skin_tone": "🤞🏼",
+    "crossed_fingers_medium_skin_tone": "🤞🏽",
+    "crossed_flags": "🎌",
+    "crossed_swords": "⚔",
+    "crown": "👑",
+    "crying_cat_face": "😿",
+    "crying_face": "😢",
+    "crystal_ball": "🔮",
+    "cucumber": "🥒",
+    "cupcake": "🧁",
+    "cup_with_straw": "🥤",
+    "curling_stone": "🥌",
+    "curly_hair": "🦱",
+    "curly-haired_man": "👨\u200d🦱",
+    "curly-haired_woman": "👩\u200d🦱",
+    "curly_loop": "➰",
+    "currency_exchange": "💱",
+    "curry_rice": "🍛",
+    "custard": "🍮",
+    "customs": "🛃",
+    "cut_of_meat": "🥩",
+    "cyclone": "🌀",
+    "dagger": "🗡",
+    "dango": "🍡",
+    "dashing_away": "💨",
+    "deaf_person": "🧏",
+    "deciduous_tree": "🌳",
+    "deer": "🦌",
+    "delivery_truck": "🚚",
+    "department_store": "🏬",
+    "derelict_house": "🏚",
+    "desert": "🏜",
+    "desert_island": "🏝",
+    "desktop_computer": "🖥",
+    "detective": "🕵",
+    "detective_dark_skin_tone": "🕵🏿",
+    "detective_light_skin_tone": "🕵🏻",
+    "detective_medium-dark_skin_tone": "🕵🏾",
+    "detective_medium-light_skin_tone": "🕵🏼",
+    "detective_medium_skin_tone": "🕵🏽",
+    "diamond_suit": "♦",
+    "diamond_with_a_dot": "💠",
+    "dim_button": "🔅",
+    "direct_hit": "🎯",
+    "disappointed_face": "😞",
+    "diving_mask": "🤿",
+    "diya_lamp": "🪔",
+    "dizzy": "💫",
+    "dizzy_face": "😵",
+    "dna": "🧬",
+    "dog": "🐶",
+    "dog_face": "🐶",
+    "dollar_banknote": "💵",
+    "dolphin": "🐬",
+    "door": "🚪",
+    "dotted_six-pointed_star": "🔯",
+    "double_curly_loop": "➿",
+    "double_exclamation_mark": "‼",
+    "doughnut": "🍩",
+    "dove": "🕊",
+    "down-left_arrow": "↙",
+    "down-right_arrow": "↘",
+    "down_arrow": "⬇",
+    "downcast_face_with_sweat": "😓",
+    "downwards_button": "🔽",
+    "dragon": "🐉",
+    "dragon_face": "🐲",
+    "dress": "👗",
+    "drooling_face": "🤤",
+    "drop_of_blood": "🩸",
+    "droplet": "💧",
+    "drum": "🥁",
+    "duck": "🦆",
+    "dumpling": "🥟",
+    "dvd": "📀",
+    "e-mail": "📧",
+    "eagle": "🦅",
+    "ear": "👂",
+    "ear_dark_skin_tone": "👂🏿",
+    "ear_light_skin_tone": "👂🏻",
+    "ear_medium-dark_skin_tone": "👂🏾",
+    "ear_medium-light_skin_tone": "👂🏼",
+    "ear_medium_skin_tone": "👂🏽",
+    "ear_of_corn": "🌽",
+    "ear_with_hearing_aid": "🦻",
+    "egg": "🍳",
+    "eggplant": "🍆",
+    "eight-pointed_star": "✴",
+    "eight-spoked_asterisk": "✳",
+    "eight-thirty": "🕣",
+    "eight_o’clock": "🕗",
+    "eject_button": "⏏",
+    "electric_plug": "🔌",
+    "elephant": "🐘",
+    "eleven-thirty": "🕦",
+    "eleven_o’clock": "🕚",
+    "elf": "🧝",
+    "elf_dark_skin_tone": "🧝🏿",
+    "elf_light_skin_tone": "🧝🏻",
+    "elf_medium-dark_skin_tone": "🧝🏾",
+    "elf_medium-light_skin_tone": "🧝🏼",
+    "elf_medium_skin_tone": "🧝🏽",
+    "envelope": "✉",
+    "envelope_with_arrow": "📩",
+    "euro_banknote": "💶",
+    "evergreen_tree": "🌲",
+    "ewe": "🐑",
+    "exclamation_mark": "❗",
+    "exclamation_question_mark": "⁉",
+    "exploding_head": "🤯",
+    "expressionless_face": "😑",
+    "eye": "👁",
+    "eye_in_speech_bubble": "👁️\u200d🗨️",
+    "eyes": "👀",
+    "face_blowing_a_kiss": "😘",
+    "face_savoring_food": "😋",
+    "face_screaming_in_fear": "😱",
+    "face_vomiting": "🤮",
+    "face_with_hand_over_mouth": "🤭",
+    "face_with_head-bandage": "🤕",
+    "face_with_medical_mask": "😷",
+    "face_with_monocle": "🧐",
+    "face_with_open_mouth": "😮",
+    "face_with_raised_eyebrow": "🤨",
+    "face_with_rolling_eyes": "🙄",
+    "face_with_steam_from_nose": "😤",
+    "face_with_symbols_on_mouth": "🤬",
+    "face_with_tears_of_joy": "😂",
+    "face_with_thermometer": "🤒",
+    "face_with_tongue": "😛",
+    "face_without_mouth": "😶",
+    "factory": "🏭",
+    "fairy": "🧚",
+    "fairy_dark_skin_tone": "🧚🏿",
+    "fairy_light_skin_tone": "🧚🏻",
+    "fairy_medium-dark_skin_tone": "🧚🏾",
+    "fairy_medium-light_skin_tone": "🧚🏼",
+    "fairy_medium_skin_tone": "🧚🏽",
+    "falafel": "🧆",
+    "fallen_leaf": "🍂",
+    "family": "👪",
+    "family_man_boy": "👨\u200d👦",
+    "family_man_boy_boy": "👨\u200d👦\u200d👦",
+    "family_man_girl": "👨\u200d👧",
+    "family_man_girl_boy": "👨\u200d👧\u200d👦",
+    "family_man_girl_girl": "👨\u200d👧\u200d👧",
+    "family_man_man_boy": "👨\u200d👨\u200d👦",
+    "family_man_man_boy_boy": "👨\u200d👨\u200d👦\u200d👦",
+    "family_man_man_girl": "👨\u200d👨\u200d👧",
+    "family_man_man_girl_boy": "👨\u200d👨\u200d👧\u200d👦",
+    "family_man_man_girl_girl": "👨\u200d👨\u200d👧\u200d👧",
+    "family_man_woman_boy": "👨\u200d👩\u200d👦",
+    "family_man_woman_boy_boy": "👨\u200d👩\u200d👦\u200d👦",
+    "family_man_woman_girl": "👨\u200d👩\u200d👧",
+    "family_man_woman_girl_boy": "👨\u200d👩\u200d👧\u200d👦",
+    "family_man_woman_girl_girl": "👨\u200d👩\u200d👧\u200d👧",
+    "family_woman_boy": "👩\u200d👦",
+    "family_woman_boy_boy": "👩\u200d👦\u200d👦",
+    "family_woman_girl": "👩\u200d👧",
+    "family_woman_girl_boy": "👩\u200d👧\u200d👦",
+    "family_woman_girl_girl": "👩\u200d👧\u200d👧",
+    "family_woman_woman_boy": "👩\u200d👩\u200d👦",
+    "family_woman_woman_boy_boy": "👩\u200d👩\u200d👦\u200d👦",
+    "family_woman_woman_girl": "👩\u200d👩\u200d👧",
+    "family_woman_woman_girl_boy": "👩\u200d👩\u200d👧\u200d👦",
+    "family_woman_woman_girl_girl": "👩\u200d👩\u200d👧\u200d👧",
+    "fast-forward_button": "⏩",
+    "fast_down_button": "⏬",
+    "fast_reverse_button": "⏪",
+    "fast_up_button": "⏫",
+    "fax_machine": "📠",
+    "fearful_face": "😨",
+    "female_sign": "♀",
+    "ferris_wheel": "🎡",
+    "ferry": "⛴",
+    "field_hockey": "🏑",
+    "file_cabinet": "🗄",
+    "file_folder": "📁",
+    "film_frames": "🎞",
+    "film_projector": "📽",
+    "fire": "🔥",
+    "fire_extinguisher": "🧯",
+    "firecracker": "🧨",
+    "fire_engine": "🚒",
+    "fireworks": "🎆",
+    "first_quarter_moon": "🌓",
+    "first_quarter_moon_face": "🌛",
+    "fish": "🐟",
+    "fish_cake_with_swirl": "🍥",
+    "fishing_pole": "🎣",
+    "five-thirty": "🕠",
+    "five_o’clock": "🕔",
+    "flag_in_hole": "⛳",
+    "flamingo": "🦩",
+    "flashlight": "🔦",
+    "flat_shoe": "🥿",
+    "fleur-de-lis": "⚜",
+    "flexed_biceps": "💪",
+    "flexed_biceps_dark_skin_tone": "💪🏿",
+    "flexed_biceps_light_skin_tone": "💪🏻",
+    "flexed_biceps_medium-dark_skin_tone": "💪🏾",
+    "flexed_biceps_medium-light_skin_tone": "💪🏼",
+    "flexed_biceps_medium_skin_tone": "💪🏽",
+    "floppy_disk": "💾",
+    "flower_playing_cards": "🎴",
+    "flushed_face": "😳",
+    "flying_disc": "🥏",
+    "flying_saucer": "🛸",
+    "fog": "🌫",
+    "foggy": "🌁",
+    "folded_hands": "🙏",
+    "folded_hands_dark_skin_tone": "🙏🏿",
+    "folded_hands_light_skin_tone": "🙏🏻",
+    "folded_hands_medium-dark_skin_tone": "🙏🏾",
+    "folded_hands_medium-light_skin_tone": "🙏🏼",
+    "folded_hands_medium_skin_tone": "🙏🏽",
+    "foot": "🦶",
+    "footprints": "👣",
+    "fork_and_knife": "🍴",
+    "fork_and_knife_with_plate": "🍽",
+    "fortune_cookie": "🥠",
+    "fountain": "⛲",
+    "fountain_pen": "🖋",
+    "four-thirty": "🕟",
+    "four_leaf_clover": "🍀",
+    "four_o’clock": "🕓",
+    "fox_face": "🦊",
+    "framed_picture": "🖼",
+    "french_fries": "🍟",
+    "fried_shrimp": "🍤",
+    "frog_face": "🐸",
+    "front-facing_baby_chick": "🐥",
+    "frowning_face": "☹",
+    "frowning_face_with_open_mouth": "😦",
+    "fuel_pump": "⛽",
+    "full_moon": "🌕",
+    "full_moon_face": "🌝",
+    "funeral_urn": "⚱",
+    "game_die": "🎲",
+    "garlic": "🧄",
+    "gear": "⚙",
+    "gem_stone": "💎",
+    "genie": "🧞",
+    "ghost": "👻",
+    "giraffe": "🦒",
+    "girl": "👧",
+    "girl_dark_skin_tone": "👧🏿",
+    "girl_light_skin_tone": "👧🏻",
+    "girl_medium-dark_skin_tone": "👧🏾",
+    "girl_medium-light_skin_tone": "👧🏼",
+    "girl_medium_skin_tone": "👧🏽",
+    "glass_of_milk": "🥛",
+    "glasses": "👓",
+    "globe_showing_americas": "🌎",
+    "globe_showing_asia-australia": "🌏",
+    "globe_showing_europe-africa": "🌍",
+    "globe_with_meridians": "🌐",
+    "gloves": "🧤",
+    "glowing_star": "🌟",
+    "goal_net": "🥅",
+    "goat": "🐐",
+    "goblin": "👺",
+    "goggles": "🥽",
+    "gorilla": "🦍",
+    "graduation_cap": "🎓",
+    "grapes": "🍇",
+    "green_apple": "🍏",
+    "green_book": "📗",
+    "green_circle": "🟢",
+    "green_heart": "💚",
+    "green_salad": "🥗",
+    "green_square": "🟩",
+    "grimacing_face": "😬",
+    "grinning_cat_face": "😺",
+    "grinning_cat_face_with_smiling_eyes": "😸",
+    "grinning_face": "😀",
+    "grinning_face_with_big_eyes": "😃",
+    "grinning_face_with_smiling_eyes": "😄",
+    "grinning_face_with_sweat": "😅",
+    "grinning_squinting_face": "😆",
+    "growing_heart": "💗",
+    "guard": "💂",
+    "guard_dark_skin_tone": "💂🏿",
+    "guard_light_skin_tone": "💂🏻",
+    "guard_medium-dark_skin_tone": "💂🏾",
+    "guard_medium-light_skin_tone": "💂🏼",
+    "guard_medium_skin_tone": "💂🏽",
+    "guide_dog": "🦮",
+    "guitar": "🎸",
+    "hamburger": "🍔",
+    "hammer": "🔨",
+    "hammer_and_pick": "⚒",
+    "hammer_and_wrench": "🛠",
+    "hamster_face": "🐹",
+    "hand_with_fingers_splayed": "🖐",
+    "hand_with_fingers_splayed_dark_skin_tone": "🖐🏿",
+    "hand_with_fingers_splayed_light_skin_tone": "🖐🏻",
+    "hand_with_fingers_splayed_medium-dark_skin_tone": "🖐🏾",
+    "hand_with_fingers_splayed_medium-light_skin_tone": "🖐🏼",
+    "hand_with_fingers_splayed_medium_skin_tone": "🖐🏽",
+    "handbag": "👜",
+    "handshake": "🤝",
+    "hatching_chick": "🐣",
+    "headphone": "🎧",
+    "hear-no-evil_monkey": "🙉",
+    "heart_decoration": "💟",
+    "heart_suit": "♥",
+    "heart_with_arrow": "💘",
+    "heart_with_ribbon": "💝",
+    "heavy_check_mark": "✔",
+    "heavy_division_sign": "➗",
+    "heavy_dollar_sign": "💲",
+    "heavy_heart_exclamation": "❣",
+    "heavy_large_circle": "⭕",
+    "heavy_minus_sign": "➖",
+    "heavy_multiplication_x": "✖",
+    "heavy_plus_sign": "➕",
+    "hedgehog": "🦔",
+    "helicopter": "🚁",
+    "herb": "🌿",
+    "hibiscus": "🌺",
+    "high-heeled_shoe": "👠",
+    "high-speed_train": "🚄",
+    "high_voltage": "⚡",
+    "hiking_boot": "🥾",
+    "hindu_temple": "🛕",
+    "hippopotamus": "🦛",
+    "hole": "🕳",
+    "honey_pot": "🍯",
+    "honeybee": "🐝",
+    "horizontal_traffic_light": "🚥",
+    "horse": "🐴",
+    "horse_face": "🐴",
+    "horse_racing": "🏇",
+    "horse_racing_dark_skin_tone": "🏇🏿",
+    "horse_racing_light_skin_tone": "🏇🏻",
+    "horse_racing_medium-dark_skin_tone": "🏇🏾",
+    "horse_racing_medium-light_skin_tone": "🏇🏼",
+    "horse_racing_medium_skin_tone": "🏇🏽",
+    "hospital": "🏥",
+    "hot_beverage": "☕",
+    "hot_dog": "🌭",
+    "hot_face": "🥵",
+    "hot_pepper": "🌶",
+    "hot_springs": "♨",
+    "hotel": "🏨",
+    "hourglass_done": "⌛",
+    "hourglass_not_done": "⏳",
+    "house": "🏠",
+    "house_with_garden": "🏡",
+    "houses": "🏘",
+    "hugging_face": "🤗",
+    "hundred_points": "💯",
+    "hushed_face": "😯",
+    "ice": "🧊",
+    "ice_cream": "🍨",
+    "ice_hockey": "🏒",
+    "ice_skate": "⛸",
+    "inbox_tray": "📥",
+    "incoming_envelope": "📨",
+    "index_pointing_up": "☝",
+    "index_pointing_up_dark_skin_tone": "☝🏿",
+    "index_pointing_up_light_skin_tone": "☝🏻",
+    "index_pointing_up_medium-dark_skin_tone": "☝🏾",
+    "index_pointing_up_medium-light_skin_tone": "☝🏼",
+    "index_pointing_up_medium_skin_tone": "☝🏽",
+    "infinity": "♾",
+    "information": "ℹ",
+    "input_latin_letters": "🔤",
+    "input_latin_lowercase": "🔡",
+    "input_latin_uppercase": "🔠",
+    "input_numbers": "🔢",
+    "input_symbols": "🔣",
+    "jack-o-lantern": "🎃",
+    "jeans": "👖",
+    "jigsaw": "🧩",
+    "joker": "🃏",
+    "joystick": "🕹",
+    "kaaba": "🕋",
+    "kangaroo": "🦘",
+    "key": "🔑",
+    "keyboard": "⌨",
+    "keycap_#": "#️⃣",
+    "keycap_*": "*️⃣",
+    "keycap_0": "0️⃣",
+    "keycap_1": "1️⃣",
+    "keycap_10": "🔟",
+    "keycap_2": "2️⃣",
+    "keycap_3": "3️⃣",
+    "keycap_4": "4️⃣",
+    "keycap_5": "5️⃣",
+    "keycap_6": "6️⃣",
+    "keycap_7": "7️⃣",
+    "keycap_8": "8️⃣",
+    "keycap_9": "9️⃣",
+    "kick_scooter": "🛴",
+    "kimono": "👘",
+    "kiss": "💋",
+    "kiss_man_man": "👨\u200d❤️\u200d💋\u200d👨",
+    "kiss_mark": "💋",
+    "kiss_woman_man": "👩\u200d❤️\u200d💋\u200d👨",
+    "kiss_woman_woman": "👩\u200d❤️\u200d💋\u200d👩",
+    "kissing_cat_face": "😽",
+    "kissing_face": "😗",
+    "kissing_face_with_closed_eyes": "😚",
+    "kissing_face_with_smiling_eyes": "😙",
+    "kitchen_knife": "🔪",
+    "kite": "🪁",
+    "kiwi_fruit": "🥝",
+    "koala": "🐨",
+    "lab_coat": "🥼",
+    "label": "🏷",
+    "lacrosse": "🥍",
+    "lady_beetle": "🐞",
+    "laptop_computer": "💻",
+    "large_blue_diamond": "🔷",
+    "large_orange_diamond": "🔶",
+    "last_quarter_moon": "🌗",
+    "last_quarter_moon_face": "🌜",
+    "last_track_button": "⏮",
+    "latin_cross": "✝",
+    "leaf_fluttering_in_wind": "🍃",
+    "leafy_green": "🥬",
+    "ledger": "📒",
+    "left-facing_fist": "🤛",
+    "left-facing_fist_dark_skin_tone": "🤛🏿",
+    "left-facing_fist_light_skin_tone": "🤛🏻",
+    "left-facing_fist_medium-dark_skin_tone": "🤛🏾",
+    "left-facing_fist_medium-light_skin_tone": "🤛🏼",
+    "left-facing_fist_medium_skin_tone": "🤛🏽",
+    "left-right_arrow": "↔",
+    "left_arrow": "⬅",
+    "left_arrow_curving_right": "↪",
+    "left_luggage": "🛅",
+    "left_speech_bubble": "🗨",
+    "leg": "🦵",
+    "lemon": "🍋",
+    "leopard": "🐆",
+    "level_slider": "🎚",
+    "light_bulb": "💡",
+    "light_rail": "🚈",
+    "link": "🔗",
+    "linked_paperclips": "🖇",
+    "lion_face": "🦁",
+    "lipstick": "💄",
+    "litter_in_bin_sign": "🚮",
+    "lizard": "🦎",
+    "llama": "🦙",
+    "lobster": "🦞",
+    "locked": "🔒",
+    "locked_with_key": "🔐",
+    "locked_with_pen": "🔏",
+    "locomotive": "🚂",
+    "lollipop": "🍭",
+    "lotion_bottle": "🧴",
+    "loudly_crying_face": "😭",
+    "loudspeaker": "📢",
+    "love-you_gesture": "🤟",
+    "love-you_gesture_dark_skin_tone": "🤟🏿",
+    "love-you_gesture_light_skin_tone": "🤟🏻",
+    "love-you_gesture_medium-dark_skin_tone": "🤟🏾",
+    "love-you_gesture_medium-light_skin_tone": "🤟🏼",
+    "love-you_gesture_medium_skin_tone": "🤟🏽",
+    "love_hotel": "🏩",
+    "love_letter": "💌",
+    "luggage": "🧳",
+    "lying_face": "🤥",
+    "mage": "🧙",
+    "mage_dark_skin_tone": "🧙🏿",
+    "mage_light_skin_tone": "🧙🏻",
+    "mage_medium-dark_skin_tone": "🧙🏾",
+    "mage_medium-light_skin_tone": "🧙🏼",
+    "mage_medium_skin_tone": "🧙🏽",
+    "magnet": "🧲",
+    "magnifying_glass_tilted_left": "🔍",
+    "magnifying_glass_tilted_right": "🔎",
+    "mahjong_red_dragon": "🀄",
+    "male_sign": "♂",
+    "man": "👨",
+    "man_and_woman_holding_hands": "👫",
+    "man_artist": "👨\u200d🎨",
+    "man_artist_dark_skin_tone": "👨🏿\u200d🎨",
+    "man_artist_light_skin_tone": "👨🏻\u200d🎨",
+    "man_artist_medium-dark_skin_tone": "👨🏾\u200d🎨",
+    "man_artist_medium-light_skin_tone": "👨🏼\u200d🎨",
+    "man_artist_medium_skin_tone": "👨🏽\u200d🎨",
+    "man_astronaut": "👨\u200d🚀",
+    "man_astronaut_dark_skin_tone": "👨🏿\u200d🚀",
+    "man_astronaut_light_skin_tone": "👨🏻\u200d🚀",
+    "man_astronaut_medium-dark_skin_tone": "👨🏾\u200d🚀",
+    "man_astronaut_medium-light_skin_tone": "👨🏼\u200d🚀",
+    "man_astronaut_medium_skin_tone": "👨🏽\u200d🚀",
+    "man_biking": "🚴\u200d♂️",
+    "man_biking_dark_skin_tone": "🚴🏿\u200d♂️",
+    "man_biking_light_skin_tone": "🚴🏻\u200d♂️",
+    "man_biking_medium-dark_skin_tone": "🚴🏾\u200d♂️",
+    "man_biking_medium-light_skin_tone": "🚴🏼\u200d♂️",
+    "man_biking_medium_skin_tone": "🚴🏽\u200d♂️",
+    "man_bouncing_ball": "⛹️\u200d♂️",
+    "man_bouncing_ball_dark_skin_tone": "⛹🏿\u200d♂️",
+    "man_bouncing_ball_light_skin_tone": "⛹🏻\u200d♂️",
+    "man_bouncing_ball_medium-dark_skin_tone": "⛹🏾\u200d♂️",
+    "man_bouncing_ball_medium-light_skin_tone": "⛹🏼\u200d♂️",
+    "man_bouncing_ball_medium_skin_tone": "⛹🏽\u200d♂️",
+    "man_bowing": "🙇\u200d♂️",
+    "man_bowing_dark_skin_tone": "🙇🏿\u200d♂️",
+    "man_bowing_light_skin_tone": "🙇🏻\u200d♂️",
+    "man_bowing_medium-dark_skin_tone": "🙇🏾\u200d♂️",
+    "man_bowing_medium-light_skin_tone": "🙇🏼\u200d♂️",
+    "man_bowing_medium_skin_tone": "🙇🏽\u200d♂️",
+    "man_cartwheeling": "🤸\u200d♂️",
+    "man_cartwheeling_dark_skin_tone": "🤸🏿\u200d♂️",
+    "man_cartwheeling_light_skin_tone": "🤸🏻\u200d♂️",
+    "man_cartwheeling_medium-dark_skin_tone": "🤸🏾\u200d♂️",
+    "man_cartwheeling_medium-light_skin_tone": "🤸🏼\u200d♂️",
+    "man_cartwheeling_medium_skin_tone": "🤸🏽\u200d♂️",
+    "man_climbing": "🧗\u200d♂️",
+    "man_climbing_dark_skin_tone": "🧗🏿\u200d♂️",
+    "man_climbing_light_skin_tone": "🧗🏻\u200d♂️",
+    "man_climbing_medium-dark_skin_tone": "🧗🏾\u200d♂️",
+    "man_climbing_medium-light_skin_tone": "🧗🏼\u200d♂️",
+    "man_climbing_medium_skin_tone": "🧗🏽\u200d♂️",
+    "man_construction_worker": "👷\u200d♂️",
+    "man_construction_worker_dark_skin_tone": "👷🏿\u200d♂️",
+    "man_construction_worker_light_skin_tone": "👷🏻\u200d♂️",
+    "man_construction_worker_medium-dark_skin_tone": "👷🏾\u200d♂️",
+    "man_construction_worker_medium-light_skin_tone": "👷🏼\u200d♂️",
+    "man_construction_worker_medium_skin_tone": "👷🏽\u200d♂️",
+    "man_cook": "👨\u200d🍳",
+    "man_cook_dark_skin_tone": "👨🏿\u200d🍳",
+    "man_cook_light_skin_tone": "👨🏻\u200d🍳",
+    "man_cook_medium-dark_skin_tone": "👨🏾\u200d🍳",
+    "man_cook_medium-light_skin_tone": "👨🏼\u200d🍳",
+    "man_cook_medium_skin_tone": "👨🏽\u200d🍳",
+    "man_dancing": "🕺",
+    "man_dancing_dark_skin_tone": "🕺🏿",
+    "man_dancing_light_skin_tone": "🕺🏻",
+    "man_dancing_medium-dark_skin_tone": "🕺🏾",
+    "man_dancing_medium-light_skin_tone": "🕺🏼",
+    "man_dancing_medium_skin_tone": "🕺🏽",
+    "man_dark_skin_tone": "👨🏿",
+    "man_detective": "🕵️\u200d♂️",
+    "man_detective_dark_skin_tone": "🕵🏿\u200d♂️",
+    "man_detective_light_skin_tone": "🕵🏻\u200d♂️",
+    "man_detective_medium-dark_skin_tone": "🕵🏾\u200d♂️",
+    "man_detective_medium-light_skin_tone": "🕵🏼\u200d♂️",
+    "man_detective_medium_skin_tone": "🕵🏽\u200d♂️",
+    "man_elf": "🧝\u200d♂️",
+    "man_elf_dark_skin_tone": "🧝🏿\u200d♂️",
+    "man_elf_light_skin_tone": "🧝🏻\u200d♂️",
+    "man_elf_medium-dark_skin_tone": "🧝🏾\u200d♂️",
+    "man_elf_medium-light_skin_tone": "🧝🏼\u200d♂️",
+    "man_elf_medium_skin_tone": "🧝🏽\u200d♂️",
+    "man_facepalming": "🤦\u200d♂️",
+    "man_facepalming_dark_skin_tone": "🤦🏿\u200d♂️",
+    "man_facepalming_light_skin_tone": "🤦🏻\u200d♂️",
+    "man_facepalming_medium-dark_skin_tone": "🤦🏾\u200d♂️",
+    "man_facepalming_medium-light_skin_tone": "🤦🏼\u200d♂️",
+    "man_facepalming_medium_skin_tone": "🤦🏽\u200d♂️",
+    "man_factory_worker": "👨\u200d🏭",
+    "man_factory_worker_dark_skin_tone": "👨🏿\u200d🏭",
+    "man_factory_worker_light_skin_tone": "👨🏻\u200d🏭",
+    "man_factory_worker_medium-dark_skin_tone": "👨🏾\u200d🏭",
+    "man_factory_worker_medium-light_skin_tone": "👨🏼\u200d🏭",
+    "man_factory_worker_medium_skin_tone": "👨🏽\u200d🏭",
+    "man_fairy": "🧚\u200d♂️",
+    "man_fairy_dark_skin_tone": "🧚🏿\u200d♂️",
+    "man_fairy_light_skin_tone": "🧚🏻\u200d♂️",
+    "man_fairy_medium-dark_skin_tone": "🧚🏾\u200d♂️",
+    "man_fairy_medium-light_skin_tone": "🧚🏼\u200d♂️",
+    "man_fairy_medium_skin_tone": "🧚🏽\u200d♂️",
+    "man_farmer": "👨\u200d🌾",
+    "man_farmer_dark_skin_tone": "👨🏿\u200d🌾",
+    "man_farmer_light_skin_tone": "👨🏻\u200d🌾",
+    "man_farmer_medium-dark_skin_tone": "👨🏾\u200d🌾",
+    "man_farmer_medium-light_skin_tone": "👨🏼\u200d🌾",
+    "man_farmer_medium_skin_tone": "👨🏽\u200d🌾",
+    "man_firefighter": "👨\u200d🚒",
+    "man_firefighter_dark_skin_tone": "👨🏿\u200d🚒",
+    "man_firefighter_light_skin_tone": "👨🏻\u200d🚒",
+    "man_firefighter_medium-dark_skin_tone": "👨🏾\u200d🚒",
+    "man_firefighter_medium-light_skin_tone": "👨🏼\u200d🚒",
+    "man_firefighter_medium_skin_tone": "👨🏽\u200d🚒",
+    "man_frowning": "🙍\u200d♂️",
+    "man_frowning_dark_skin_tone": "🙍🏿\u200d♂️",
+    "man_frowning_light_skin_tone": "🙍🏻\u200d♂️",
+    "man_frowning_medium-dark_skin_tone": "🙍🏾\u200d♂️",
+    "man_frowning_medium-light_skin_tone": "🙍🏼\u200d♂️",
+    "man_frowning_medium_skin_tone": "🙍🏽\u200d♂️",
+    "man_genie": "🧞\u200d♂️",
+    "man_gesturing_no": "🙅\u200d♂️",
+    "man_gesturing_no_dark_skin_tone": "🙅🏿\u200d♂️",
+    "man_gesturing_no_light_skin_tone": "🙅🏻\u200d♂️",
+    "man_gesturing_no_medium-dark_skin_tone": "🙅🏾\u200d♂️",
+    "man_gesturing_no_medium-light_skin_tone": "🙅🏼\u200d♂️",
+    "man_gesturing_no_medium_skin_tone": "🙅🏽\u200d♂️",
+    "man_gesturing_ok": "🙆\u200d♂️",
+    "man_gesturing_ok_dark_skin_tone": "🙆🏿\u200d♂️",
+    "man_gesturing_ok_light_skin_tone": "🙆🏻\u200d♂️",
+    "man_gesturing_ok_medium-dark_skin_tone": "🙆🏾\u200d♂️",
+    "man_gesturing_ok_medium-light_skin_tone": "🙆🏼\u200d♂️",
+    "man_gesturing_ok_medium_skin_tone": "🙆🏽\u200d♂️",
+    "man_getting_haircut": "💇\u200d♂️",
+    "man_getting_haircut_dark_skin_tone": "💇🏿\u200d♂️",
+    "man_getting_haircut_light_skin_tone": "💇🏻\u200d♂️",
+    "man_getting_haircut_medium-dark_skin_tone": "💇🏾\u200d♂️",
+    "man_getting_haircut_medium-light_skin_tone": "💇🏼\u200d♂️",
+    "man_getting_haircut_medium_skin_tone": "💇🏽\u200d♂️",
+    "man_getting_massage": "💆\u200d♂️",
+    "man_getting_massage_dark_skin_tone": "💆🏿\u200d♂️",
+    "man_getting_massage_light_skin_tone": "💆🏻\u200d♂️",
+    "man_getting_massage_medium-dark_skin_tone": "💆🏾\u200d♂️",
+    "man_getting_massage_medium-light_skin_tone": "💆🏼\u200d♂️",
+    "man_getting_massage_medium_skin_tone": "💆🏽\u200d♂️",
+    "man_golfing": "🏌️\u200d♂️",
+    "man_golfing_dark_skin_tone": "🏌🏿\u200d♂️",
+    "man_golfing_light_skin_tone": "🏌🏻\u200d♂️",
+    "man_golfing_medium-dark_skin_tone": "🏌🏾\u200d♂️",
+    "man_golfing_medium-light_skin_tone": "🏌🏼\u200d♂️",
+    "man_golfing_medium_skin_tone": "🏌🏽\u200d♂️",
+    "man_guard": "💂\u200d♂️",
+    "man_guard_dark_skin_tone": "💂🏿\u200d♂️",
+    "man_guard_light_skin_tone": "💂🏻\u200d♂️",
+    "man_guard_medium-dark_skin_tone": "💂🏾\u200d♂️",
+    "man_guard_medium-light_skin_tone": "💂🏼\u200d♂️",
+    "man_guard_medium_skin_tone": "💂🏽\u200d♂️",
+    "man_health_worker": "👨\u200d⚕️",
+    "man_health_worker_dark_skin_tone": "👨🏿\u200d⚕️",
+    "man_health_worker_light_skin_tone": "👨🏻\u200d⚕️",
+    "man_health_worker_medium-dark_skin_tone": "👨🏾\u200d⚕️",
+    "man_health_worker_medium-light_skin_tone": "👨🏼\u200d⚕️",
+    "man_health_worker_medium_skin_tone": "👨🏽\u200d⚕️",
+    "man_in_lotus_position": "🧘\u200d♂️",
+    "man_in_lotus_position_dark_skin_tone": "🧘🏿\u200d♂️",
+    "man_in_lotus_position_light_skin_tone": "🧘🏻\u200d♂️",
+    "man_in_lotus_position_medium-dark_skin_tone": "🧘🏾\u200d♂️",
+    "man_in_lotus_position_medium-light_skin_tone": "🧘🏼\u200d♂️",
+    "man_in_lotus_position_medium_skin_tone": "🧘🏽\u200d♂️",
+    "man_in_manual_wheelchair": "👨\u200d🦽",
+    "man_in_motorized_wheelchair": "👨\u200d🦼",
+    "man_in_steamy_room": "🧖\u200d♂️",
+    "man_in_steamy_room_dark_skin_tone": "🧖🏿\u200d♂️",
+    "man_in_steamy_room_light_skin_tone": "🧖🏻\u200d♂️",
+    "man_in_steamy_room_medium-dark_skin_tone": "🧖🏾\u200d♂️",
+    "man_in_steamy_room_medium-light_skin_tone": "🧖🏼\u200d♂️",
+    "man_in_steamy_room_medium_skin_tone": "🧖🏽\u200d♂️",
+    "man_in_suit_levitating": "🕴",
+    "man_in_suit_levitating_dark_skin_tone": "🕴🏿",
+    "man_in_suit_levitating_light_skin_tone": "🕴🏻",
+    "man_in_suit_levitating_medium-dark_skin_tone": "🕴🏾",
+    "man_in_suit_levitating_medium-light_skin_tone": "🕴🏼",
+    "man_in_suit_levitating_medium_skin_tone": "🕴🏽",
+    "man_in_tuxedo": "🤵",
+    "man_in_tuxedo_dark_skin_tone": "🤵🏿",
+    "man_in_tuxedo_light_skin_tone": "🤵🏻",
+    "man_in_tuxedo_medium-dark_skin_tone": "🤵🏾",
+    "man_in_tuxedo_medium-light_skin_tone": "🤵🏼",
+    "man_in_tuxedo_medium_skin_tone": "🤵🏽",
+    "man_judge": "👨\u200d⚖️",
+    "man_judge_dark_skin_tone": "👨🏿\u200d⚖️",
+    "man_judge_light_skin_tone": "👨🏻\u200d⚖️",
+    "man_judge_medium-dark_skin_tone": "👨🏾\u200d⚖️",
+    "man_judge_medium-light_skin_tone": "👨🏼\u200d⚖️",
+    "man_judge_medium_skin_tone": "👨🏽\u200d⚖️",
+    "man_juggling": "🤹\u200d♂️",
+    "man_juggling_dark_skin_tone": "🤹🏿\u200d♂️",
+    "man_juggling_light_skin_tone": "🤹🏻\u200d♂️",
+    "man_juggling_medium-dark_skin_tone": "🤹🏾\u200d♂️",
+    "man_juggling_medium-light_skin_tone": "🤹🏼\u200d♂️",
+    "man_juggling_medium_skin_tone": "🤹🏽\u200d♂️",
+    "man_lifting_weights": "🏋️\u200d♂️",
+    "man_lifting_weights_dark_skin_tone": "🏋🏿\u200d♂️",
+    "man_lifting_weights_light_skin_tone": "🏋🏻\u200d♂️",
+    "man_lifting_weights_medium-dark_skin_tone": "🏋🏾\u200d♂️",
+    "man_lifting_weights_medium-light_skin_tone": "🏋🏼\u200d♂️",
+    "man_lifting_weights_medium_skin_tone": "🏋🏽\u200d♂️",
+    "man_light_skin_tone": "👨🏻",
+    "man_mage": "🧙\u200d♂️",
+    "man_mage_dark_skin_tone": "🧙🏿\u200d♂️",
+    "man_mage_light_skin_tone": "🧙🏻\u200d♂️",
+    "man_mage_medium-dark_skin_tone": "🧙🏾\u200d♂️",
+    "man_mage_medium-light_skin_tone": "🧙🏼\u200d♂️",
+    "man_mage_medium_skin_tone": "🧙🏽\u200d♂️",
+    "man_mechanic": "👨\u200d🔧",
+    "man_mechanic_dark_skin_tone": "👨🏿\u200d🔧",
+    "man_mechanic_light_skin_tone": "👨🏻\u200d🔧",
+    "man_mechanic_medium-dark_skin_tone": "👨🏾\u200d🔧",
+    "man_mechanic_medium-light_skin_tone": "👨🏼\u200d🔧",
+    "man_mechanic_medium_skin_tone": "👨🏽\u200d🔧",
+    "man_medium-dark_skin_tone": "👨🏾",
+    "man_medium-light_skin_tone": "👨🏼",
+    "man_medium_skin_tone": "👨🏽",
+    "man_mountain_biking": "🚵\u200d♂️",
+    "man_mountain_biking_dark_skin_tone": "🚵🏿\u200d♂️",
+    "man_mountain_biking_light_skin_tone": "🚵🏻\u200d♂️",
+    "man_mountain_biking_medium-dark_skin_tone": "🚵🏾\u200d♂️",
+    "man_mountain_biking_medium-light_skin_tone": "🚵🏼\u200d♂️",
+    "man_mountain_biking_medium_skin_tone": "🚵🏽\u200d♂️",
+    "man_office_worker": "👨\u200d💼",
+    "man_office_worker_dark_skin_tone": "👨🏿\u200d💼",
+    "man_office_worker_light_skin_tone": "👨🏻\u200d💼",
+    "man_office_worker_medium-dark_skin_tone": "👨🏾\u200d💼",
+    "man_office_worker_medium-light_skin_tone": "👨🏼\u200d💼",
+    "man_office_worker_medium_skin_tone": "👨🏽\u200d💼",
+    "man_pilot": "👨\u200d✈️",
+    "man_pilot_dark_skin_tone": "👨🏿\u200d✈️",
+    "man_pilot_light_skin_tone": "👨🏻\u200d✈️",
+    "man_pilot_medium-dark_skin_tone": "👨🏾\u200d✈️",
+    "man_pilot_medium-light_skin_tone": "👨🏼\u200d✈️",
+    "man_pilot_medium_skin_tone": "👨🏽\u200d✈️",
+    "man_playing_handball": "🤾\u200d♂️",
+    "man_playing_handball_dark_skin_tone": "🤾🏿\u200d♂️",
+    "man_playing_handball_light_skin_tone": "🤾🏻\u200d♂️",
+    "man_playing_handball_medium-dark_skin_tone": "🤾🏾\u200d♂️",
+    "man_playing_handball_medium-light_skin_tone": "🤾🏼\u200d♂️",
+    "man_playing_handball_medium_skin_tone": "🤾🏽\u200d♂️",
+    "man_playing_water_polo": "🤽\u200d♂️",
+    "man_playing_water_polo_dark_skin_tone": "🤽🏿\u200d♂️",
+    "man_playing_water_polo_light_skin_tone": "🤽🏻\u200d♂️",
+    "man_playing_water_polo_medium-dark_skin_tone": "🤽🏾\u200d♂️",
+    "man_playing_water_polo_medium-light_skin_tone": "🤽🏼\u200d♂️",
+    "man_playing_water_polo_medium_skin_tone": "🤽🏽\u200d♂️",
+    "man_police_officer": "👮\u200d♂️",
+    "man_police_officer_dark_skin_tone": "👮🏿\u200d♂️",
+    "man_police_officer_light_skin_tone": "👮🏻\u200d♂️",
+    "man_police_officer_medium-dark_skin_tone": "👮🏾\u200d♂️",
+    "man_police_officer_medium-light_skin_tone": "👮🏼\u200d♂️",
+    "man_police_officer_medium_skin_tone": "👮🏽\u200d♂️",
+    "man_pouting": "🙎\u200d♂️",
+    "man_pouting_dark_skin_tone": "🙎🏿\u200d♂️",
+    "man_pouting_light_skin_tone": "🙎🏻\u200d♂️",
+    "man_pouting_medium-dark_skin_tone": "🙎🏾\u200d♂️",
+    "man_pouting_medium-light_skin_tone": "🙎🏼\u200d♂️",
+    "man_pouting_medium_skin_tone": "🙎🏽\u200d♂️",
+    "man_raising_hand": "🙋\u200d♂️",
+    "man_raising_hand_dark_skin_tone": "🙋🏿\u200d♂️",
+    "man_raising_hand_light_skin_tone": "🙋🏻\u200d♂️",
+    "man_raising_hand_medium-dark_skin_tone": "🙋🏾\u200d♂️",
+    "man_raising_hand_medium-light_skin_tone": "🙋🏼\u200d♂️",
+    "man_raising_hand_medium_skin_tone": "🙋🏽\u200d♂️",
+    "man_rowing_boat": "🚣\u200d♂️",
+    "man_rowing_boat_dark_skin_tone": "🚣🏿\u200d♂️",
+    "man_rowing_boat_light_skin_tone": "🚣🏻\u200d♂️",
+    "man_rowing_boat_medium-dark_skin_tone": "🚣🏾\u200d♂️",
+    "man_rowing_boat_medium-light_skin_tone": "🚣🏼\u200d♂️",
+    "man_rowing_boat_medium_skin_tone": "🚣🏽\u200d♂️",
+    "man_running": "🏃\u200d♂️",
+    "man_running_dark_skin_tone": "🏃🏿\u200d♂️",
+    "man_running_light_skin_tone": "🏃🏻\u200d♂️",
+    "man_running_medium-dark_skin_tone": "🏃🏾\u200d♂️",
+    "man_running_medium-light_skin_tone": "🏃🏼\u200d♂️",
+    "man_running_medium_skin_tone": "🏃🏽\u200d♂️",
+    "man_scientist": "👨\u200d🔬",
+    "man_scientist_dark_skin_tone": "👨🏿\u200d🔬",
+    "man_scientist_light_skin_tone": "👨🏻\u200d🔬",
+    "man_scientist_medium-dark_skin_tone": "👨🏾\u200d🔬",
+    "man_scientist_medium-light_skin_tone": "👨🏼\u200d🔬",
+    "man_scientist_medium_skin_tone": "👨🏽\u200d🔬",
+    "man_shrugging": "🤷\u200d♂️",
+    "man_shrugging_dark_skin_tone": "🤷🏿\u200d♂️",
+    "man_shrugging_light_skin_tone": "🤷🏻\u200d♂️",
+    "man_shrugging_medium-dark_skin_tone": "🤷🏾\u200d♂️",
+    "man_shrugging_medium-light_skin_tone": "🤷🏼\u200d♂️",
+    "man_shrugging_medium_skin_tone": "🤷🏽\u200d♂️",
+    "man_singer": "👨\u200d🎤",
+    "man_singer_dark_skin_tone": "👨🏿\u200d🎤",
+    "man_singer_light_skin_tone": "👨🏻\u200d🎤",
+    "man_singer_medium-dark_skin_tone": "👨🏾\u200d🎤",
+    "man_singer_medium-light_skin_tone": "👨🏼\u200d🎤",
+    "man_singer_medium_skin_tone": "👨🏽\u200d🎤",
+    "man_student": "👨\u200d🎓",
+    "man_student_dark_skin_tone": "👨🏿\u200d🎓",
+    "man_student_light_skin_tone": "👨🏻\u200d🎓",
+    "man_student_medium-dark_skin_tone": "👨🏾\u200d🎓",
+    "man_student_medium-light_skin_tone": "👨🏼\u200d🎓",
+    "man_student_medium_skin_tone": "👨🏽\u200d🎓",
+    "man_surfing": "🏄\u200d♂️",
+    "man_surfing_dark_skin_tone": "🏄🏿\u200d♂️",
+    "man_surfing_light_skin_tone": "🏄🏻\u200d♂️",
+    "man_surfing_medium-dark_skin_tone": "🏄🏾\u200d♂️",
+    "man_surfing_medium-light_skin_tone": "🏄🏼\u200d♂️",
+    "man_surfing_medium_skin_tone": "🏄🏽\u200d♂️",
+    "man_swimming": "🏊\u200d♂️",
+    "man_swimming_dark_skin_tone": "🏊🏿\u200d♂️",
+    "man_swimming_light_skin_tone": "🏊🏻\u200d♂️",
+    "man_swimming_medium-dark_skin_tone": "🏊🏾\u200d♂️",
+    "man_swimming_medium-light_skin_tone": "🏊🏼\u200d♂️",
+    "man_swimming_medium_skin_tone": "🏊🏽\u200d♂️",
+    "man_teacher": "👨\u200d🏫",
+    "man_teacher_dark_skin_tone": "👨🏿\u200d🏫",
+    "man_teacher_light_skin_tone": "👨🏻\u200d🏫",
+    "man_teacher_medium-dark_skin_tone": "👨🏾\u200d🏫",
+    "man_teacher_medium-light_skin_tone": "👨🏼\u200d🏫",
+    "man_teacher_medium_skin_tone": "👨🏽\u200d🏫",
+    "man_technologist": "👨\u200d💻",
+    "man_technologist_dark_skin_tone": "👨🏿\u200d💻",
+    "man_technologist_light_skin_tone": "👨🏻\u200d💻",
+    "man_technologist_medium-dark_skin_tone": "👨🏾\u200d💻",
+    "man_technologist_medium-light_skin_tone": "👨🏼\u200d💻",
+    "man_technologist_medium_skin_tone": "👨🏽\u200d💻",
+    "man_tipping_hand": "💁\u200d♂️",
+    "man_tipping_hand_dark_skin_tone": "💁🏿\u200d♂️",
+    "man_tipping_hand_light_skin_tone": "💁🏻\u200d♂️",
+    "man_tipping_hand_medium-dark_skin_tone": "💁🏾\u200d♂️",
+    "man_tipping_hand_medium-light_skin_tone": "💁🏼\u200d♂️",
+    "man_tipping_hand_medium_skin_tone": "💁🏽\u200d♂️",
+    "man_vampire": "🧛\u200d♂️",
+    "man_vampire_dark_skin_tone": "🧛🏿\u200d♂️",
+    "man_vampire_light_skin_tone": "🧛🏻\u200d♂️",
+    "man_vampire_medium-dark_skin_tone": "🧛🏾\u200d♂️",
+    "man_vampire_medium-light_skin_tone": "🧛🏼\u200d♂️",
+    "man_vampire_medium_skin_tone": "🧛🏽\u200d♂️",
+    "man_walking": "🚶\u200d♂️",
+    "man_walking_dark_skin_tone": "🚶🏿\u200d♂️",
+    "man_walking_light_skin_tone": "🚶🏻\u200d♂️",
+    "man_walking_medium-dark_skin_tone": "🚶🏾\u200d♂️",
+    "man_walking_medium-light_skin_tone": "🚶🏼\u200d♂️",
+    "man_walking_medium_skin_tone": "🚶🏽\u200d♂️",
+    "man_wearing_turban": "👳\u200d♂️",
+    "man_wearing_turban_dark_skin_tone": "👳🏿\u200d♂️",
+    "man_wearing_turban_light_skin_tone": "👳🏻\u200d♂️",
+    "man_wearing_turban_medium-dark_skin_tone": "👳🏾\u200d♂️",
+    "man_wearing_turban_medium-light_skin_tone": "👳🏼\u200d♂️",
+    "man_wearing_turban_medium_skin_tone": "👳🏽\u200d♂️",
+    "man_with_probing_cane": "👨\u200d🦯",
+    "man_with_chinese_cap": "👲",
+    "man_with_chinese_cap_dark_skin_tone": "👲🏿",
+    "man_with_chinese_cap_light_skin_tone": "👲🏻",
+    "man_with_chinese_cap_medium-dark_skin_tone": "👲🏾",
+    "man_with_chinese_cap_medium-light_skin_tone": "👲🏼",
+    "man_with_chinese_cap_medium_skin_tone": "👲🏽",
+    "man_zombie": "🧟\u200d♂️",
+    "mango": "🥭",
+    "mantelpiece_clock": "🕰",
+    "manual_wheelchair": "🦽",
+    "man’s_shoe": "👞",
+    "map_of_japan": "🗾",
+    "maple_leaf": "🍁",
+    "martial_arts_uniform": "🥋",
+    "mate": "🧉",
+    "meat_on_bone": "🍖",
+    "mechanical_arm": "🦾",
+    "mechanical_leg": "🦿",
+    "medical_symbol": "⚕",
+    "megaphone": "📣",
+    "melon": "🍈",
+    "memo": "📝",
+    "men_with_bunny_ears": "👯\u200d♂️",
+    "men_wrestling": "🤼\u200d♂️",
+    "menorah": "🕎",
+    "men’s_room": "🚹",
+    "mermaid": "🧜\u200d♀️",
+    "mermaid_dark_skin_tone": "🧜🏿\u200d♀️",
+    "mermaid_light_skin_tone": "🧜🏻\u200d♀️",
+    "mermaid_medium-dark_skin_tone": "🧜🏾\u200d♀️",
+    "mermaid_medium-light_skin_tone": "🧜🏼\u200d♀️",
+    "mermaid_medium_skin_tone": "🧜🏽\u200d♀️",
+    "merman": "🧜\u200d♂️",
+    "merman_dark_skin_tone": "🧜🏿\u200d♂️",
+    "merman_light_skin_tone": "🧜🏻\u200d♂️",
+    "merman_medium-dark_skin_tone": "🧜🏾\u200d♂️",
+    "merman_medium-light_skin_tone": "🧜🏼\u200d♂️",
+    "merman_medium_skin_tone": "🧜🏽\u200d♂️",
+    "merperson": "🧜",
+    "merperson_dark_skin_tone": "🧜🏿",
+    "merperson_light_skin_tone": "🧜🏻",
+    "merperson_medium-dark_skin_tone": "🧜🏾",
+    "merperson_medium-light_skin_tone": "🧜🏼",
+    "merperson_medium_skin_tone": "🧜🏽",
+    "metro": "🚇",
+    "microbe": "🦠",
+    "microphone": "🎤",
+    "microscope": "🔬",
+    "middle_finger": "🖕",
+    "middle_finger_dark_skin_tone": "🖕🏿",
+    "middle_finger_light_skin_tone": "🖕🏻",
+    "middle_finger_medium-dark_skin_tone": "🖕🏾",
+    "middle_finger_medium-light_skin_tone": "🖕🏼",
+    "middle_finger_medium_skin_tone": "🖕🏽",
+    "military_medal": "🎖",
+    "milky_way": "🌌",
+    "minibus": "🚐",
+    "moai": "🗿",
+    "mobile_phone": "📱",
+    "mobile_phone_off": "📴",
+    "mobile_phone_with_arrow": "📲",
+    "money-mouth_face": "🤑",
+    "money_bag": "💰",
+    "money_with_wings": "💸",
+    "monkey": "🐒",
+    "monkey_face": "🐵",
+    "monorail": "🚝",
+    "moon_cake": "🥮",
+    "moon_viewing_ceremony": "🎑",
+    "mosque": "🕌",
+    "mosquito": "🦟",
+    "motor_boat": "🛥",
+    "motor_scooter": "🛵",
+    "motorcycle": "🏍",
+    "motorized_wheelchair": "🦼",
+    "motorway": "🛣",
+    "mount_fuji": "🗻",
+    "mountain": "⛰",
+    "mountain_cableway": "🚠",
+    "mountain_railway": "🚞",
+    "mouse": "🐭",
+    "mouse_face": "🐭",
+    "mouth": "👄",
+    "movie_camera": "🎥",
+    "mushroom": "🍄",
+    "musical_keyboard": "🎹",
+    "musical_note": "🎵",
+    "musical_notes": "🎶",
+    "musical_score": "🎼",
+    "muted_speaker": "🔇",
+    "nail_polish": "💅",
+    "nail_polish_dark_skin_tone": "💅🏿",
+    "nail_polish_light_skin_tone": "💅🏻",
+    "nail_polish_medium-dark_skin_tone": "💅🏾",
+    "nail_polish_medium-light_skin_tone": "💅🏼",
+    "nail_polish_medium_skin_tone": "💅🏽",
+    "name_badge": "📛",
+    "national_park": "🏞",
+    "nauseated_face": "🤢",
+    "nazar_amulet": "🧿",
+    "necktie": "👔",
+    "nerd_face": "🤓",
+    "neutral_face": "😐",
+    "new_moon": "🌑",
+    "new_moon_face": "🌚",
+    "newspaper": "📰",
+    "next_track_button": "⏭",
+    "night_with_stars": "🌃",
+    "nine-thirty": "🕤",
+    "nine_o’clock": "🕘",
+    "no_bicycles": "🚳",
+    "no_entry": "⛔",
+    "no_littering": "🚯",
+    "no_mobile_phones": "📵",
+    "no_one_under_eighteen": "🔞",
+    "no_pedestrians": "🚷",
+    "no_smoking": "🚭",
+    "non-potable_water": "🚱",
+    "nose": "👃",
+    "nose_dark_skin_tone": "👃🏿",
+    "nose_light_skin_tone": "👃🏻",
+    "nose_medium-dark_skin_tone": "👃🏾",
+    "nose_medium-light_skin_tone": "👃🏼",
+    "nose_medium_skin_tone": "👃🏽",
+    "notebook": "📓",
+    "notebook_with_decorative_cover": "📔",
+    "nut_and_bolt": "🔩",
+    "octopus": "🐙",
+    "oden": "🍢",
+    "office_building": "🏢",
+    "ogre": "👹",
+    "oil_drum": "🛢",
+    "old_key": "🗝",
+    "old_man": "👴",
+    "old_man_dark_skin_tone": "👴🏿",
+    "old_man_light_skin_tone": "👴🏻",
+    "old_man_medium-dark_skin_tone": "👴🏾",
+    "old_man_medium-light_skin_tone": "👴🏼",
+    "old_man_medium_skin_tone": "👴🏽",
+    "old_woman": "👵",
+    "old_woman_dark_skin_tone": "👵🏿",
+    "old_woman_light_skin_tone": "👵🏻",
+    "old_woman_medium-dark_skin_tone": "👵🏾",
+    "old_woman_medium-light_skin_tone": "👵🏼",
+    "old_woman_medium_skin_tone": "👵🏽",
+    "older_adult": "🧓",
+    "older_adult_dark_skin_tone": "🧓🏿",
+    "older_adult_light_skin_tone": "🧓🏻",
+    "older_adult_medium-dark_skin_tone": "🧓🏾",
+    "older_adult_medium-light_skin_tone": "🧓🏼",
+    "older_adult_medium_skin_tone": "🧓🏽",
+    "om": "🕉",
+    "oncoming_automobile": "🚘",
+    "oncoming_bus": "🚍",
+    "oncoming_fist": "👊",
+    "oncoming_fist_dark_skin_tone": "👊🏿",
+    "oncoming_fist_light_skin_tone": "👊🏻",
+    "oncoming_fist_medium-dark_skin_tone": "👊🏾",
+    "oncoming_fist_medium-light_skin_tone": "👊🏼",
+    "oncoming_fist_medium_skin_tone": "👊🏽",
+    "oncoming_police_car": "🚔",
+    "oncoming_taxi": "🚖",
+    "one-piece_swimsuit": "🩱",
+    "one-thirty": "🕜",
+    "one_o’clock": "🕐",
+    "onion": "🧅",
+    "open_book": "📖",
+    "open_file_folder": "📂",
+    "open_hands": "👐",
+    "open_hands_dark_skin_tone": "👐🏿",
+    "open_hands_light_skin_tone": "👐🏻",
+    "open_hands_medium-dark_skin_tone": "👐🏾",
+    "open_hands_medium-light_skin_tone": "👐🏼",
+    "open_hands_medium_skin_tone": "👐🏽",
+    "open_mailbox_with_lowered_flag": "📭",
+    "open_mailbox_with_raised_flag": "📬",
+    "optical_disk": "💿",
+    "orange_book": "📙",
+    "orange_circle": "🟠",
+    "orange_heart": "🧡",
+    "orange_square": "🟧",
+    "orangutan": "🦧",
+    "orthodox_cross": "☦",
+    "otter": "🦦",
+    "outbox_tray": "📤",
+    "owl": "🦉",
+    "ox": "🐂",
+    "oyster": "🦪",
+    "package": "📦",
+    "page_facing_up": "📄",
+    "page_with_curl": "📃",
+    "pager": "📟",
+    "paintbrush": "🖌",
+    "palm_tree": "🌴",
+    "palms_up_together": "🤲",
+    "palms_up_together_dark_skin_tone": "🤲🏿",
+    "palms_up_together_light_skin_tone": "🤲🏻",
+    "palms_up_together_medium-dark_skin_tone": "🤲🏾",
+    "palms_up_together_medium-light_skin_tone": "🤲🏼",
+    "palms_up_together_medium_skin_tone": "🤲🏽",
+    "pancakes": "🥞",
+    "panda_face": "🐼",
+    "paperclip": "📎",
+    "parrot": "🦜",
+    "part_alternation_mark": "〽",
+    "party_popper": "🎉",
+    "partying_face": "🥳",
+    "passenger_ship": "🛳",
+    "passport_control": "🛂",
+    "pause_button": "⏸",
+    "paw_prints": "🐾",
+    "peace_symbol": "☮",
+    "peach": "🍑",
+    "peacock": "🦚",
+    "peanuts": "🥜",
+    "pear": "🍐",
+    "pen": "🖊",
+    "pencil": "📝",
+    "penguin": "🐧",
+    "pensive_face": "😔",
+    "people_holding_hands": "🧑\u200d🤝\u200d🧑",
+    "people_with_bunny_ears": "👯",
+    "people_wrestling": "🤼",
+    "performing_arts": "🎭",
+    "persevering_face": "😣",
+    "person_biking": "🚴",
+    "person_biking_dark_skin_tone": "🚴🏿",
+    "person_biking_light_skin_tone": "🚴🏻",
+    "person_biking_medium-dark_skin_tone": "🚴🏾",
+    "person_biking_medium-light_skin_tone": "🚴🏼",
+    "person_biking_medium_skin_tone": "🚴🏽",
+    "person_bouncing_ball": "⛹",
+    "person_bouncing_ball_dark_skin_tone": "⛹🏿",
+    "person_bouncing_ball_light_skin_tone": "⛹🏻",
+    "person_bouncing_ball_medium-dark_skin_tone": "⛹🏾",
+    "person_bouncing_ball_medium-light_skin_tone": "⛹🏼",
+    "person_bouncing_ball_medium_skin_tone": "⛹🏽",
+    "person_bowing": "🙇",
+    "person_bowing_dark_skin_tone": "🙇🏿",
+    "person_bowing_light_skin_tone": "🙇🏻",
+    "person_bowing_medium-dark_skin_tone": "🙇🏾",
+    "person_bowing_medium-light_skin_tone": "🙇🏼",
+    "person_bowing_medium_skin_tone": "🙇🏽",
+    "person_cartwheeling": "🤸",
+    "person_cartwheeling_dark_skin_tone": "🤸🏿",
+    "person_cartwheeling_light_skin_tone": "🤸🏻",
+    "person_cartwheeling_medium-dark_skin_tone": "🤸🏾",
+    "person_cartwheeling_medium-light_skin_tone": "🤸🏼",
+    "person_cartwheeling_medium_skin_tone": "🤸🏽",
+    "person_climbing": "🧗",
+    "person_climbing_dark_skin_tone": "🧗🏿",
+    "person_climbing_light_skin_tone": "🧗🏻",
+    "person_climbing_medium-dark_skin_tone": "🧗🏾",
+    "person_climbing_medium-light_skin_tone": "🧗🏼",
+    "person_climbing_medium_skin_tone": "🧗🏽",
+    "person_facepalming": "🤦",
+    "person_facepalming_dark_skin_tone": "🤦🏿",
+    "person_facepalming_light_skin_tone": "🤦🏻",
+    "person_facepalming_medium-dark_skin_tone": "🤦🏾",
+    "person_facepalming_medium-light_skin_tone": "🤦🏼",
+    "person_facepalming_medium_skin_tone": "🤦🏽",
+    "person_fencing": "🤺",
+    "person_frowning": "🙍",
+    "person_frowning_dark_skin_tone": "🙍🏿",
+    "person_frowning_light_skin_tone": "🙍🏻",
+    "person_frowning_medium-dark_skin_tone": "🙍🏾",
+    "person_frowning_medium-light_skin_tone": "🙍🏼",
+    "person_frowning_medium_skin_tone": "🙍🏽",
+    "person_gesturing_no": "🙅",
+    "person_gesturing_no_dark_skin_tone": "🙅🏿",
+    "person_gesturing_no_light_skin_tone": "🙅🏻",
+    "person_gesturing_no_medium-dark_skin_tone": "🙅🏾",
+    "person_gesturing_no_medium-light_skin_tone": "🙅🏼",
+    "person_gesturing_no_medium_skin_tone": "🙅🏽",
+    "person_gesturing_ok": "🙆",
+    "person_gesturing_ok_dark_skin_tone": "🙆🏿",
+    "person_gesturing_ok_light_skin_tone": "🙆🏻",
+    "person_gesturing_ok_medium-dark_skin_tone": "🙆🏾",
+    "person_gesturing_ok_medium-light_skin_tone": "🙆🏼",
+    "person_gesturing_ok_medium_skin_tone": "🙆🏽",
+    "person_getting_haircut": "💇",
+    "person_getting_haircut_dark_skin_tone": "💇🏿",
+    "person_getting_haircut_light_skin_tone": "💇🏻",
+    "person_getting_haircut_medium-dark_skin_tone": "💇🏾",
+    "person_getting_haircut_medium-light_skin_tone": "💇🏼",
+    "person_getting_haircut_medium_skin_tone": "💇🏽",
+    "person_getting_massage": "💆",
+    "person_getting_massage_dark_skin_tone": "💆🏿",
+    "person_getting_massage_light_skin_tone": "💆🏻",
+    "person_getting_massage_medium-dark_skin_tone": "💆🏾",
+    "person_getting_massage_medium-light_skin_tone": "💆🏼",
+    "person_getting_massage_medium_skin_tone": "💆🏽",
+    "person_golfing": "🏌",
+    "person_golfing_dark_skin_tone": "🏌🏿",
+    "person_golfing_light_skin_tone": "🏌🏻",
+    "person_golfing_medium-dark_skin_tone": "🏌🏾",
+    "person_golfing_medium-light_skin_tone": "🏌🏼",
+    "person_golfing_medium_skin_tone": "🏌🏽",
+    "person_in_bed": "🛌",
+    "person_in_bed_dark_skin_tone": "🛌🏿",
+    "person_in_bed_light_skin_tone": "🛌🏻",
+    "person_in_bed_medium-dark_skin_tone": "🛌🏾",
+    "person_in_bed_medium-light_skin_tone": "🛌🏼",
+    "person_in_bed_medium_skin_tone": "🛌🏽",
+    "person_in_lotus_position": "🧘",
+    "person_in_lotus_position_dark_skin_tone": "🧘🏿",
+    "person_in_lotus_position_light_skin_tone": "🧘🏻",
+    "person_in_lotus_position_medium-dark_skin_tone": "🧘🏾",
+    "person_in_lotus_position_medium-light_skin_tone": "🧘🏼",
+    "person_in_lotus_position_medium_skin_tone": "🧘🏽",
+    "person_in_steamy_room": "🧖",
+    "person_in_steamy_room_dark_skin_tone": "🧖🏿",
+    "person_in_steamy_room_light_skin_tone": "🧖🏻",
+    "person_in_steamy_room_medium-dark_skin_tone": "🧖🏾",
+    "person_in_steamy_room_medium-light_skin_tone": "🧖🏼",
+    "person_in_steamy_room_medium_skin_tone": "🧖🏽",
+    "person_juggling": "🤹",
+    "person_juggling_dark_skin_tone": "🤹🏿",
+    "person_juggling_light_skin_tone": "🤹🏻",
+    "person_juggling_medium-dark_skin_tone": "🤹🏾",
+    "person_juggling_medium-light_skin_tone": "🤹🏼",
+    "person_juggling_medium_skin_tone": "🤹🏽",
+    "person_kneeling": "🧎",
+    "person_lifting_weights": "🏋",
+    "person_lifting_weights_dark_skin_tone": "🏋🏿",
+    "person_lifting_weights_light_skin_tone": "🏋🏻",
+    "person_lifting_weights_medium-dark_skin_tone": "🏋🏾",
+    "person_lifting_weights_medium-light_skin_tone": "🏋🏼",
+    "person_lifting_weights_medium_skin_tone": "🏋🏽",
+    "person_mountain_biking": "🚵",
+    "person_mountain_biking_dark_skin_tone": "🚵🏿",
+    "person_mountain_biking_light_skin_tone": "🚵🏻",
+    "person_mountain_biking_medium-dark_skin_tone": "🚵🏾",
+    "person_mountain_biking_medium-light_skin_tone": "🚵🏼",
+    "person_mountain_biking_medium_skin_tone": "🚵🏽",
+    "person_playing_handball": "🤾",
+    "person_playing_handball_dark_skin_tone": "🤾🏿",
+    "person_playing_handball_light_skin_tone": "🤾🏻",
+    "person_playing_handball_medium-dark_skin_tone": "🤾🏾",
+    "person_playing_handball_medium-light_skin_tone": "🤾🏼",
+    "person_playing_handball_medium_skin_tone": "🤾🏽",
+    "person_playing_water_polo": "🤽",
+    "person_playing_water_polo_dark_skin_tone": "🤽🏿",
+    "person_playing_water_polo_light_skin_tone": "🤽🏻",
+    "person_playing_water_polo_medium-dark_skin_tone": "🤽🏾",
+    "person_playing_water_polo_medium-light_skin_tone": "🤽🏼",
+    "person_playing_water_polo_medium_skin_tone": "🤽🏽",
+    "person_pouting": "🙎",
+    "person_pouting_dark_skin_tone": "🙎🏿",
+    "person_pouting_light_skin_tone": "🙎🏻",
+    "person_pouting_medium-dark_skin_tone": "🙎🏾",
+    "person_pouting_medium-light_skin_tone": "🙎🏼",
+    "person_pouting_medium_skin_tone": "🙎🏽",
+    "person_raising_hand": "🙋",
+    "person_raising_hand_dark_skin_tone": "🙋🏿",
+    "person_raising_hand_light_skin_tone": "🙋🏻",
+    "person_raising_hand_medium-dark_skin_tone": "🙋🏾",
+    "person_raising_hand_medium-light_skin_tone": "🙋🏼",
+    "person_raising_hand_medium_skin_tone": "🙋🏽",
+    "person_rowing_boat": "🚣",
+    "person_rowing_boat_dark_skin_tone": "🚣🏿",
+    "person_rowing_boat_light_skin_tone": "🚣🏻",
+    "person_rowing_boat_medium-dark_skin_tone": "🚣🏾",
+    "person_rowing_boat_medium-light_skin_tone": "🚣🏼",
+    "person_rowing_boat_medium_skin_tone": "🚣🏽",
+    "person_running": "🏃",
+    "person_running_dark_skin_tone": "🏃🏿",
+    "person_running_light_skin_tone": "🏃🏻",
+    "person_running_medium-dark_skin_tone": "🏃🏾",
+    "person_running_medium-light_skin_tone": "🏃🏼",
+    "person_running_medium_skin_tone": "🏃🏽",
+    "person_shrugging": "🤷",
+    "person_shrugging_dark_skin_tone": "🤷🏿",
+    "person_shrugging_light_skin_tone": "🤷🏻",
+    "person_shrugging_medium-dark_skin_tone": "🤷🏾",
+    "person_shrugging_medium-light_skin_tone": "🤷🏼",
+    "person_shrugging_medium_skin_tone": "🤷🏽",
+    "person_standing": "🧍",
+    "person_surfing": "🏄",
+    "person_surfing_dark_skin_tone": "🏄🏿",
+    "person_surfing_light_skin_tone": "🏄🏻",
+    "person_surfing_medium-dark_skin_tone": "🏄🏾",
+    "person_surfing_medium-light_skin_tone": "🏄🏼",
+    "person_surfing_medium_skin_tone": "🏄🏽",
+    "person_swimming": "🏊",
+    "person_swimming_dark_skin_tone": "🏊🏿",
+    "person_swimming_light_skin_tone": "🏊🏻",
+    "person_swimming_medium-dark_skin_tone": "🏊🏾",
+    "person_swimming_medium-light_skin_tone": "🏊🏼",
+    "person_swimming_medium_skin_tone": "🏊🏽",
+    "person_taking_bath": "🛀",
+    "person_taking_bath_dark_skin_tone": "🛀🏿",
+    "person_taking_bath_light_skin_tone": "🛀🏻",
+    "person_taking_bath_medium-dark_skin_tone": "🛀🏾",
+    "person_taking_bath_medium-light_skin_tone": "🛀🏼",
+    "person_taking_bath_medium_skin_tone": "🛀🏽",
+    "person_tipping_hand": "💁",
+    "person_tipping_hand_dark_skin_tone": "💁🏿",
+    "person_tipping_hand_light_skin_tone": "💁🏻",
+    "person_tipping_hand_medium-dark_skin_tone": "💁🏾",
+    "person_tipping_hand_medium-light_skin_tone": "💁🏼",
+    "person_tipping_hand_medium_skin_tone": "💁🏽",
+    "person_walking": "🚶",
+    "person_walking_dark_skin_tone": "🚶🏿",
+    "person_walking_light_skin_tone": "🚶🏻",
+    "person_walking_medium-dark_skin_tone": "🚶🏾",
+    "person_walking_medium-light_skin_tone": "🚶🏼",
+    "person_walking_medium_skin_tone": "🚶🏽",
+    "person_wearing_turban": "👳",
+    "person_wearing_turban_dark_skin_tone": "👳🏿",
+    "person_wearing_turban_light_skin_tone": "👳🏻",
+    "person_wearing_turban_medium-dark_skin_tone": "👳🏾",
+    "person_wearing_turban_medium-light_skin_tone": "👳🏼",
+    "person_wearing_turban_medium_skin_tone": "👳🏽",
+    "petri_dish": "🧫",
+    "pick": "⛏",
+    "pie": "🥧",
+    "pig": "🐷",
+    "pig_face": "🐷",
+    "pig_nose": "🐽",
+    "pile_of_poo": "💩",
+    "pill": "💊",
+    "pinching_hand": "🤏",
+    "pine_decoration": "🎍",
+    "pineapple": "🍍",
+    "ping_pong": "🏓",
+    "pirate_flag": "🏴\u200d☠️",
+    "pistol": "🔫",
+    "pizza": "🍕",
+    "place_of_worship": "🛐",
+    "play_button": "▶",
+    "play_or_pause_button": "⏯",
+    "pleading_face": "🥺",
+    "police_car": "🚓",
+    "police_car_light": "🚨",
+    "police_officer": "👮",
+    "police_officer_dark_skin_tone": "👮🏿",
+    "police_officer_light_skin_tone": "👮🏻",
+    "police_officer_medium-dark_skin_tone": "👮🏾",
+    "police_officer_medium-light_skin_tone": "👮🏼",
+    "police_officer_medium_skin_tone": "👮🏽",
+    "poodle": "🐩",
+    "pool_8_ball": "🎱",
+    "popcorn": "🍿",
+    "post_office": "🏣",
+    "postal_horn": "📯",
+    "postbox": "📮",
+    "pot_of_food": "🍲",
+    "potable_water": "🚰",
+    "potato": "🥔",
+    "poultry_leg": "🍗",
+    "pound_banknote": "💷",
+    "pouting_cat_face": "😾",
+    "pouting_face": "😡",
+    "prayer_beads": "📿",
+    "pregnant_woman": "🤰",
+    "pregnant_woman_dark_skin_tone": "🤰🏿",
+    "pregnant_woman_light_skin_tone": "🤰🏻",
+    "pregnant_woman_medium-dark_skin_tone": "🤰🏾",
+    "pregnant_woman_medium-light_skin_tone": "🤰🏼",
+    "pregnant_woman_medium_skin_tone": "🤰🏽",
+    "pretzel": "🥨",
+    "probing_cane": "🦯",
+    "prince": "🤴",
+    "prince_dark_skin_tone": "🤴🏿",
+    "prince_light_skin_tone": "🤴🏻",
+    "prince_medium-dark_skin_tone": "🤴🏾",
+    "prince_medium-light_skin_tone": "🤴🏼",
+    "prince_medium_skin_tone": "🤴🏽",
+    "princess": "👸",
+    "princess_dark_skin_tone": "👸🏿",
+    "princess_light_skin_tone": "👸🏻",
+    "princess_medium-dark_skin_tone": "👸🏾",
+    "princess_medium-light_skin_tone": "👸🏼",
+    "princess_medium_skin_tone": "👸🏽",
+    "printer": "🖨",
+    "prohibited": "🚫",
+    "purple_circle": "🟣",
+    "purple_heart": "💜",
+    "purple_square": "🟪",
+    "purse": "👛",
+    "pushpin": "📌",
+    "question_mark": "❓",
+    "rabbit": "🐰",
+    "rabbit_face": "🐰",
+    "raccoon": "🦝",
+    "racing_car": "🏎",
+    "radio": "📻",
+    "radio_button": "🔘",
+    "radioactive": "☢",
+    "railway_car": "🚃",
+    "railway_track": "🛤",
+    "rainbow": "🌈",
+    "rainbow_flag": "🏳️\u200d🌈",
+    "raised_back_of_hand": "🤚",
+    "raised_back_of_hand_dark_skin_tone": "🤚🏿",
+    "raised_back_of_hand_light_skin_tone": "🤚🏻",
+    "raised_back_of_hand_medium-dark_skin_tone": "🤚🏾",
+    "raised_back_of_hand_medium-light_skin_tone": "🤚🏼",
+    "raised_back_of_hand_medium_skin_tone": "🤚🏽",
+    "raised_fist": "✊",
+    "raised_fist_dark_skin_tone": "✊🏿",
+    "raised_fist_light_skin_tone": "✊🏻",
+    "raised_fist_medium-dark_skin_tone": "✊🏾",
+    "raised_fist_medium-light_skin_tone": "✊🏼",
+    "raised_fist_medium_skin_tone": "✊🏽",
+    "raised_hand": "✋",
+    "raised_hand_dark_skin_tone": "✋🏿",
+    "raised_hand_light_skin_tone": "✋🏻",
+    "raised_hand_medium-dark_skin_tone": "✋🏾",
+    "raised_hand_medium-light_skin_tone": "✋🏼",
+    "raised_hand_medium_skin_tone": "✋🏽",
+    "raising_hands": "🙌",
+    "raising_hands_dark_skin_tone": "🙌🏿",
+    "raising_hands_light_skin_tone": "🙌🏻",
+    "raising_hands_medium-dark_skin_tone": "🙌🏾",
+    "raising_hands_medium-light_skin_tone": "🙌🏼",
+    "raising_hands_medium_skin_tone": "🙌🏽",
+    "ram": "🐏",
+    "rat": "🐀",
+    "razor": "🪒",
+    "ringed_planet": "🪐",
+    "receipt": "🧾",
+    "record_button": "⏺",
+    "recycling_symbol": "♻",
+    "red_apple": "🍎",
+    "red_circle": "🔴",
+    "red_envelope": "🧧",
+    "red_hair": "🦰",
+    "red-haired_man": "👨\u200d🦰",
+    "red-haired_woman": "👩\u200d🦰",
+    "red_heart": "❤",
+    "red_paper_lantern": "🏮",
+    "red_square": "🟥",
+    "red_triangle_pointed_down": "🔻",
+    "red_triangle_pointed_up": "🔺",
+    "registered": "®",
+    "relieved_face": "😌",
+    "reminder_ribbon": "🎗",
+    "repeat_button": "🔁",
+    "repeat_single_button": "🔂",
+    "rescue_worker’s_helmet": "⛑",
+    "restroom": "🚻",
+    "reverse_button": "◀",
+    "revolving_hearts": "💞",
+    "rhinoceros": "🦏",
+    "ribbon": "🎀",
+    "rice_ball": "🍙",
+    "rice_cracker": "🍘",
+    "right-facing_fist": "🤜",
+    "right-facing_fist_dark_skin_tone": "🤜🏿",
+    "right-facing_fist_light_skin_tone": "🤜🏻",
+    "right-facing_fist_medium-dark_skin_tone": "🤜🏾",
+    "right-facing_fist_medium-light_skin_tone": "🤜🏼",
+    "right-facing_fist_medium_skin_tone": "🤜🏽",
+    "right_anger_bubble": "🗯",
+    "right_arrow": "➡",
+    "right_arrow_curving_down": "⤵",
+    "right_arrow_curving_left": "↩",
+    "right_arrow_curving_up": "⤴",
+    "ring": "💍",
+    "roasted_sweet_potato": "🍠",
+    "robot_face": "🤖",
+    "rocket": "🚀",
+    "roll_of_paper": "🧻",
+    "rolled-up_newspaper": "🗞",
+    "roller_coaster": "🎢",
+    "rolling_on_the_floor_laughing": "🤣",
+    "rooster": "🐓",
+    "rose": "🌹",
+    "rosette": "🏵",
+    "round_pushpin": "📍",
+    "rugby_football": "🏉",
+    "running_shirt": "🎽",
+    "running_shoe": "👟",
+    "sad_but_relieved_face": "😥",
+    "safety_pin": "🧷",
+    "safety_vest": "🦺",
+    "salt": "🧂",
+    "sailboat": "⛵",
+    "sake": "🍶",
+    "sandwich": "🥪",
+    "sari": "🥻",
+    "satellite": "📡",
+    "satellite_antenna": "📡",
+    "sauropod": "🦕",
+    "saxophone": "🎷",
+    "scarf": "🧣",
+    "school": "🏫",
+    "school_backpack": "🎒",
+    "scissors": "✂",
+    "scorpion": "🦂",
+    "scroll": "📜",
+    "seat": "💺",
+    "see-no-evil_monkey": "🙈",
+    "seedling": "🌱",
+    "selfie": "🤳",
+    "selfie_dark_skin_tone": "🤳🏿",
+    "selfie_light_skin_tone": "🤳🏻",
+    "selfie_medium-dark_skin_tone": "🤳🏾",
+    "selfie_medium-light_skin_tone": "🤳🏼",
+    "selfie_medium_skin_tone": "🤳🏽",
+    "service_dog": "🐕\u200d🦺",
+    "seven-thirty": "🕢",
+    "seven_o’clock": "🕖",
+    "shallow_pan_of_food": "🥘",
+    "shamrock": "☘",
+    "shark": "🦈",
+    "shaved_ice": "🍧",
+    "sheaf_of_rice": "🌾",
+    "shield": "🛡",
+    "shinto_shrine": "⛩",
+    "ship": "🚢",
+    "shooting_star": "🌠",
+    "shopping_bags": "🛍",
+    "shopping_cart": "🛒",
+    "shortcake": "🍰",
+    "shorts": "🩳",
+    "shower": "🚿",
+    "shrimp": "🦐",
+    "shuffle_tracks_button": "🔀",
+    "shushing_face": "🤫",
+    "sign_of_the_horns": "🤘",
+    "sign_of_the_horns_dark_skin_tone": "🤘🏿",
+    "sign_of_the_horns_light_skin_tone": "🤘🏻",
+    "sign_of_the_horns_medium-dark_skin_tone": "🤘🏾",
+    "sign_of_the_horns_medium-light_skin_tone": "🤘🏼",
+    "sign_of_the_horns_medium_skin_tone": "🤘🏽",
+    "six-thirty": "🕡",
+    "six_o’clock": "🕕",
+    "skateboard": "🛹",
+    "skier": "⛷",
+    "skis": "🎿",
+    "skull": "💀",
+    "skull_and_crossbones": "☠",
+    "skunk": "🦨",
+    "sled": "🛷",
+    "sleeping_face": "😴",
+    "sleepy_face": "😪",
+    "slightly_frowning_face": "🙁",
+    "slightly_smiling_face": "🙂",
+    "slot_machine": "🎰",
+    "sloth": "🦥",
+    "small_airplane": "🛩",
+    "small_blue_diamond": "🔹",
+    "small_orange_diamond": "🔸",
+    "smiling_cat_face_with_heart-eyes": "😻",
+    "smiling_face": "☺",
+    "smiling_face_with_halo": "😇",
+    "smiling_face_with_3_hearts": "🥰",
+    "smiling_face_with_heart-eyes": "😍",
+    "smiling_face_with_horns": "😈",
+    "smiling_face_with_smiling_eyes": "😊",
+    "smiling_face_with_sunglasses": "😎",
+    "smirking_face": "😏",
+    "snail": "🐌",
+    "snake": "🐍",
+    "sneezing_face": "🤧",
+    "snow-capped_mountain": "🏔",
+    "snowboarder": "🏂",
+    "snowboarder_dark_skin_tone": "🏂🏿",
+    "snowboarder_light_skin_tone": "🏂🏻",
+    "snowboarder_medium-dark_skin_tone": "🏂🏾",
+    "snowboarder_medium-light_skin_tone": "🏂🏼",
+    "snowboarder_medium_skin_tone": "🏂🏽",
+    "snowflake": "❄",
+    "snowman": "☃",
+    "snowman_without_snow": "⛄",
+    "soap": "🧼",
+    "soccer_ball": "⚽",
+    "socks": "🧦",
+    "softball": "🥎",
+    "soft_ice_cream": "🍦",
+    "spade_suit": "♠",
+    "spaghetti": "🍝",
+    "sparkle": "❇",
+    "sparkler": "🎇",
+    "sparkles": "✨",
+    "sparkling_heart": "💖",
+    "speak-no-evil_monkey": "🙊",
+    "speaker_high_volume": "🔊",
+    "speaker_low_volume": "🔈",
+    "speaker_medium_volume": "🔉",
+    "speaking_head": "🗣",
+    "speech_balloon": "💬",
+    "speedboat": "🚤",
+    "spider": "🕷",
+    "spider_web": "🕸",
+    "spiral_calendar": "🗓",
+    "spiral_notepad": "🗒",
+    "spiral_shell": "🐚",
+    "spoon": "🥄",
+    "sponge": "🧽",
+    "sport_utility_vehicle": "🚙",
+    "sports_medal": "🏅",
+    "spouting_whale": "🐳",
+    "squid": "🦑",
+    "squinting_face_with_tongue": "😝",
+    "stadium": "🏟",
+    "star-struck": "🤩",
+    "star_and_crescent": "☪",
+    "star_of_david": "✡",
+    "station": "🚉",
+    "steaming_bowl": "🍜",
+    "stethoscope": "🩺",
+    "stop_button": "⏹",
+    "stop_sign": "🛑",
+    "stopwatch": "⏱",
+    "straight_ruler": "📏",
+    "strawberry": "🍓",
+    "studio_microphone": "🎙",
+    "stuffed_flatbread": "🥙",
+    "sun": "☀",
+    "sun_behind_cloud": "⛅",
+    "sun_behind_large_cloud": "🌥",
+    "sun_behind_rain_cloud": "🌦",
+    "sun_behind_small_cloud": "🌤",
+    "sun_with_face": "🌞",
+    "sunflower": "🌻",
+    "sunglasses": "😎",
+    "sunrise": "🌅",
+    "sunrise_over_mountains": "🌄",
+    "sunset": "🌇",
+    "superhero": "🦸",
+    "supervillain": "🦹",
+    "sushi": "🍣",
+    "suspension_railway": "🚟",
+    "swan": "🦢",
+    "sweat_droplets": "💦",
+    "synagogue": "🕍",
+    "syringe": "💉",
+    "t-shirt": "👕",
+    "taco": "🌮",
+    "takeout_box": "🥡",
+    "tanabata_tree": "🎋",
+    "tangerine": "🍊",
+    "taxi": "🚕",
+    "teacup_without_handle": "🍵",
+    "tear-off_calendar": "📆",
+    "teddy_bear": "🧸",
+    "telephone": "☎",
+    "telephone_receiver": "📞",
+    "telescope": "🔭",
+    "television": "📺",
+    "ten-thirty": "🕥",
+    "ten_o’clock": "🕙",
+    "tennis": "🎾",
+    "tent": "⛺",
+    "test_tube": "🧪",
+    "thermometer": "🌡",
+    "thinking_face": "🤔",
+    "thought_balloon": "💭",
+    "thread": "🧵",
+    "three-thirty": "🕞",
+    "three_o’clock": "🕒",
+    "thumbs_down": "👎",
+    "thumbs_down_dark_skin_tone": "👎🏿",
+    "thumbs_down_light_skin_tone": "👎🏻",
+    "thumbs_down_medium-dark_skin_tone": "👎🏾",
+    "thumbs_down_medium-light_skin_tone": "👎🏼",
+    "thumbs_down_medium_skin_tone": "👎🏽",
+    "thumbs_up": "👍",
+    "thumbs_up_dark_skin_tone": "👍🏿",
+    "thumbs_up_light_skin_tone": "👍🏻",
+    "thumbs_up_medium-dark_skin_tone": "👍🏾",
+    "thumbs_up_medium-light_skin_tone": "👍🏼",
+    "thumbs_up_medium_skin_tone": "👍🏽",
+    "ticket": "🎫",
+    "tiger": "🐯",
+    "tiger_face": "🐯",
+    "timer_clock": "⏲",
+    "tired_face": "😫",
+    "toolbox": "🧰",
+    "toilet": "🚽",
+    "tomato": "🍅",
+    "tongue": "👅",
+    "tooth": "🦷",
+    "top_hat": "🎩",
+    "tornado": "🌪",
+    "trackball": "🖲",
+    "tractor": "🚜",
+    "trade_mark": "™",
+    "train": "🚋",
+    "tram": "🚊",
+    "tram_car": "🚋",
+    "triangular_flag": "🚩",
+    "triangular_ruler": "📐",
+    "trident_emblem": "🔱",
+    "trolleybus": "🚎",
+    "trophy": "🏆",
+    "tropical_drink": "🍹",
+    "tropical_fish": "🐠",
+    "trumpet": "🎺",
+    "tulip": "🌷",
+    "tumbler_glass": "🥃",
+    "turtle": "🐢",
+    "twelve-thirty": "🕧",
+    "twelve_o’clock": "🕛",
+    "two-hump_camel": "🐫",
+    "two-thirty": "🕝",
+    "two_hearts": "💕",
+    "two_men_holding_hands": "👬",
+    "two_o’clock": "🕑",
+    "two_women_holding_hands": "👭",
+    "umbrella": "☂",
+    "umbrella_on_ground": "⛱",
+    "umbrella_with_rain_drops": "☔",
+    "unamused_face": "😒",
+    "unicorn_face": "🦄",
+    "unlocked": "🔓",
+    "up-down_arrow": "↕",
+    "up-left_arrow": "↖",
+    "up-right_arrow": "↗",
+    "up_arrow": "⬆",
+    "upside-down_face": "🙃",
+    "upwards_button": "🔼",
+    "vampire": "🧛",
+    "vampire_dark_skin_tone": "🧛🏿",
+    "vampire_light_skin_tone": "🧛🏻",
+    "vampire_medium-dark_skin_tone": "🧛🏾",
+    "vampire_medium-light_skin_tone": "🧛🏼",
+    "vampire_medium_skin_tone": "🧛🏽",
+    "vertical_traffic_light": "🚦",
+    "vibration_mode": "📳",
+    "victory_hand": "✌",
+    "victory_hand_dark_skin_tone": "✌🏿",
+    "victory_hand_light_skin_tone": "✌🏻",
+    "victory_hand_medium-dark_skin_tone": "✌🏾",
+    "victory_hand_medium-light_skin_tone": "✌🏼",
+    "victory_hand_medium_skin_tone": "✌🏽",
+    "video_camera": "📹",
+    "video_game": "🎮",
+    "videocassette": "📼",
+    "violin": "🎻",
+    "volcano": "🌋",
+    "volleyball": "🏐",
+    "vulcan_salute": "🖖",
+    "vulcan_salute_dark_skin_tone": "🖖🏿",
+    "vulcan_salute_light_skin_tone": "🖖🏻",
+    "vulcan_salute_medium-dark_skin_tone": "🖖🏾",
+    "vulcan_salute_medium-light_skin_tone": "🖖🏼",
+    "vulcan_salute_medium_skin_tone": "🖖🏽",
+    "waffle": "🧇",
+    "waning_crescent_moon": "🌘",
+    "waning_gibbous_moon": "🌖",
+    "warning": "⚠",
+    "wastebasket": "🗑",
+    "watch": "⌚",
+    "water_buffalo": "🐃",
+    "water_closet": "🚾",
+    "water_wave": "🌊",
+    "watermelon": "🍉",
+    "waving_hand": "👋",
+    "waving_hand_dark_skin_tone": "👋🏿",
+    "waving_hand_light_skin_tone": "👋🏻",
+    "waving_hand_medium-dark_skin_tone": "👋🏾",
+    "waving_hand_medium-light_skin_tone": "👋🏼",
+    "waving_hand_medium_skin_tone": "👋🏽",
+    "wavy_dash": "〰",
+    "waxing_crescent_moon": "🌒",
+    "waxing_gibbous_moon": "🌔",
+    "weary_cat_face": "🙀",
+    "weary_face": "😩",
+    "wedding": "💒",
+    "whale": "🐳",
+    "wheel_of_dharma": "☸",
+    "wheelchair_symbol": "♿",
+    "white_circle": "⚪",
+    "white_exclamation_mark": "❕",
+    "white_flag": "🏳",
+    "white_flower": "💮",
+    "white_hair": "🦳",
+    "white-haired_man": "👨\u200d🦳",
+    "white-haired_woman": "👩\u200d🦳",
+    "white_heart": "🤍",
+    "white_heavy_check_mark": "✅",
+    "white_large_square": "⬜",
+    "white_medium-small_square": "◽",
+    "white_medium_square": "◻",
+    "white_medium_star": "⭐",
+    "white_question_mark": "❔",
+    "white_small_square": "▫",
+    "white_square_button": "🔳",
+    "wilted_flower": "🥀",
+    "wind_chime": "🎐",
+    "wind_face": "🌬",
+    "wine_glass": "🍷",
+    "winking_face": "😉",
+    "winking_face_with_tongue": "😜",
+    "wolf_face": "🐺",
+    "woman": "👩",
+    "woman_artist": "👩\u200d🎨",
+    "woman_artist_dark_skin_tone": "👩🏿\u200d🎨",
+    "woman_artist_light_skin_tone": "👩🏻\u200d🎨",
+    "woman_artist_medium-dark_skin_tone": "👩🏾\u200d🎨",
+    "woman_artist_medium-light_skin_tone": "👩🏼\u200d🎨",
+    "woman_artist_medium_skin_tone": "👩🏽\u200d🎨",
+    "woman_astronaut": "👩\u200d🚀",
+    "woman_astronaut_dark_skin_tone": "👩🏿\u200d🚀",
+    "woman_astronaut_light_skin_tone": "👩🏻\u200d🚀",
+    "woman_astronaut_medium-dark_skin_tone": "👩🏾\u200d🚀",
+    "woman_astronaut_medium-light_skin_tone": "👩🏼\u200d🚀",
+    "woman_astronaut_medium_skin_tone": "👩🏽\u200d🚀",
+    "woman_biking": "🚴\u200d♀️",
+    "woman_biking_dark_skin_tone": "🚴🏿\u200d♀️",
+    "woman_biking_light_skin_tone": "🚴🏻\u200d♀️",
+    "woman_biking_medium-dark_skin_tone": "🚴🏾\u200d♀️",
+    "woman_biking_medium-light_skin_tone": "🚴🏼\u200d♀️",
+    "woman_biking_medium_skin_tone": "🚴🏽\u200d♀️",
+    "woman_bouncing_ball": "⛹️\u200d♀️",
+    "woman_bouncing_ball_dark_skin_tone": "⛹🏿\u200d♀️",
+    "woman_bouncing_ball_light_skin_tone": "⛹🏻\u200d♀️",
+    "woman_bouncing_ball_medium-dark_skin_tone": "⛹🏾\u200d♀️",
+    "woman_bouncing_ball_medium-light_skin_tone": "⛹🏼\u200d♀️",
+    "woman_bouncing_ball_medium_skin_tone": "⛹🏽\u200d♀️",
+    "woman_bowing": "🙇\u200d♀️",
+    "woman_bowing_dark_skin_tone": "🙇🏿\u200d♀️",
+    "woman_bowing_light_skin_tone": "🙇🏻\u200d♀️",
+    "woman_bowing_medium-dark_skin_tone": "🙇🏾\u200d♀️",
+    "woman_bowing_medium-light_skin_tone": "🙇🏼\u200d♀️",
+    "woman_bowing_medium_skin_tone": "🙇🏽\u200d♀️",
+    "woman_cartwheeling": "🤸\u200d♀️",
+    "woman_cartwheeling_dark_skin_tone": "🤸🏿\u200d♀️",
+    "woman_cartwheeling_light_skin_tone": "🤸🏻\u200d♀️",
+    "woman_cartwheeling_medium-dark_skin_tone": "🤸🏾\u200d♀️",
+    "woman_cartwheeling_medium-light_skin_tone": "🤸🏼\u200d♀️",
+    "woman_cartwheeling_medium_skin_tone": "🤸🏽\u200d♀️",
+    "woman_climbing": "🧗\u200d♀️",
+    "woman_climbing_dark_skin_tone": "🧗🏿\u200d♀️",
+    "woman_climbing_light_skin_tone": "🧗🏻\u200d♀️",
+    "woman_climbing_medium-dark_skin_tone": "🧗🏾\u200d♀️",
+    "woman_climbing_medium-light_skin_tone": "🧗🏼\u200d♀️",
+    "woman_climbing_medium_skin_tone": "🧗🏽\u200d♀️",
+    "woman_construction_worker": "👷\u200d♀️",
+    "woman_construction_worker_dark_skin_tone": "👷🏿\u200d♀️",
+    "woman_construction_worker_light_skin_tone": "👷🏻\u200d♀️",
+    "woman_construction_worker_medium-dark_skin_tone": "👷🏾\u200d♀️",
+    "woman_construction_worker_medium-light_skin_tone": "👷🏼\u200d♀️",
+    "woman_construction_worker_medium_skin_tone": "👷🏽\u200d♀️",
+    "woman_cook": "👩\u200d🍳",
+    "woman_cook_dark_skin_tone": "👩🏿\u200d🍳",
+    "woman_cook_light_skin_tone": "👩🏻\u200d🍳",
+    "woman_cook_medium-dark_skin_tone": "👩🏾\u200d🍳",
+    "woman_cook_medium-light_skin_tone": "👩🏼\u200d🍳",
+    "woman_cook_medium_skin_tone": "👩🏽\u200d🍳",
+    "woman_dancing": "💃",
+    "woman_dancing_dark_skin_tone": "💃🏿",
+    "woman_dancing_light_skin_tone": "💃🏻",
+    "woman_dancing_medium-dark_skin_tone": "💃🏾",
+    "woman_dancing_medium-light_skin_tone": "💃🏼",
+    "woman_dancing_medium_skin_tone": "💃🏽",
+    "woman_dark_skin_tone": "👩🏿",
+    "woman_detective": "🕵️\u200d♀️",
+    "woman_detective_dark_skin_tone": "🕵🏿\u200d♀️",
+    "woman_detective_light_skin_tone": "🕵🏻\u200d♀️",
+    "woman_detective_medium-dark_skin_tone": "🕵🏾\u200d♀️",
+    "woman_detective_medium-light_skin_tone": "🕵🏼\u200d♀️",
+    "woman_detective_medium_skin_tone": "🕵🏽\u200d♀️",
+    "woman_elf": "🧝\u200d♀️",
+    "woman_elf_dark_skin_tone": "🧝🏿\u200d♀️",
+    "woman_elf_light_skin_tone": "🧝🏻\u200d♀️",
+    "woman_elf_medium-dark_skin_tone": "🧝🏾\u200d♀️",
+    "woman_elf_medium-light_skin_tone": "🧝🏼\u200d♀️",
+    "woman_elf_medium_skin_tone": "🧝🏽\u200d♀️",
+    "woman_facepalming": "🤦\u200d♀️",
+    "woman_facepalming_dark_skin_tone": "🤦🏿\u200d♀️",
+    "woman_facepalming_light_skin_tone": "🤦🏻\u200d♀️",
+    "woman_facepalming_medium-dark_skin_tone": "🤦🏾\u200d♀️",
+    "woman_facepalming_medium-light_skin_tone": "🤦🏼\u200d♀️",
+    "woman_facepalming_medium_skin_tone": "🤦🏽\u200d♀️",
+    "woman_factory_worker": "👩\u200d🏭",
+    "woman_factory_worker_dark_skin_tone": "👩🏿\u200d🏭",
+    "woman_factory_worker_light_skin_tone": "👩🏻\u200d🏭",
+    "woman_factory_worker_medium-dark_skin_tone": "👩🏾\u200d🏭",
+    "woman_factory_worker_medium-light_skin_tone": "👩🏼\u200d🏭",
+    "woman_factory_worker_medium_skin_tone": "👩🏽\u200d🏭",
+    "woman_fairy": "🧚\u200d♀️",
+    "woman_fairy_dark_skin_tone": "🧚🏿\u200d♀️",
+    "woman_fairy_light_skin_tone": "🧚🏻\u200d♀️",
+    "woman_fairy_medium-dark_skin_tone": "🧚🏾\u200d♀️",
+    "woman_fairy_medium-light_skin_tone": "🧚🏼\u200d♀️",
+    "woman_fairy_medium_skin_tone": "🧚🏽\u200d♀️",
+    "woman_farmer": "👩\u200d🌾",
+    "woman_farmer_dark_skin_tone": "👩🏿\u200d🌾",
+    "woman_farmer_light_skin_tone": "👩🏻\u200d🌾",
+    "woman_farmer_medium-dark_skin_tone": "👩🏾\u200d🌾",
+    "woman_farmer_medium-light_skin_tone": "👩🏼\u200d🌾",
+    "woman_farmer_medium_skin_tone": "👩🏽\u200d🌾",
+    "woman_firefighter": "👩\u200d🚒",
+    "woman_firefighter_dark_skin_tone": "👩🏿\u200d🚒",
+    "woman_firefighter_light_skin_tone": "👩🏻\u200d🚒",
+    "woman_firefighter_medium-dark_skin_tone": "👩🏾\u200d🚒",
+    "woman_firefighter_medium-light_skin_tone": "👩🏼\u200d🚒",
+    "woman_firefighter_medium_skin_tone": "👩🏽\u200d🚒",
+    "woman_frowning": "🙍\u200d♀️",
+    "woman_frowning_dark_skin_tone": "🙍🏿\u200d♀️",
+    "woman_frowning_light_skin_tone": "🙍🏻\u200d♀️",
+    "woman_frowning_medium-dark_skin_tone": "🙍🏾\u200d♀️",
+    "woman_frowning_medium-light_skin_tone": "🙍🏼\u200d♀️",
+    "woman_frowning_medium_skin_tone": "🙍🏽\u200d♀️",
+    "woman_genie": "🧞\u200d♀️",
+    "woman_gesturing_no": "🙅\u200d♀️",
+    "woman_gesturing_no_dark_skin_tone": "🙅🏿\u200d♀️",
+    "woman_gesturing_no_light_skin_tone": "🙅🏻\u200d♀️",
+    "woman_gesturing_no_medium-dark_skin_tone": "🙅🏾\u200d♀️",
+    "woman_gesturing_no_medium-light_skin_tone": "🙅🏼\u200d♀️",
+    "woman_gesturing_no_medium_skin_tone": "🙅🏽\u200d♀️",
+    "woman_gesturing_ok": "🙆\u200d♀️",
+    "woman_gesturing_ok_dark_skin_tone": "🙆🏿\u200d♀️",
+    "woman_gesturing_ok_light_skin_tone": "🙆🏻\u200d♀️",
+    "woman_gesturing_ok_medium-dark_skin_tone": "🙆🏾\u200d♀️",
+    "woman_gesturing_ok_medium-light_skin_tone": "🙆🏼\u200d♀️",
+    "woman_gesturing_ok_medium_skin_tone": "🙆🏽\u200d♀️",
+    "woman_getting_haircut": "💇\u200d♀️",
+    "woman_getting_haircut_dark_skin_tone": "💇🏿\u200d♀️",
+    "woman_getting_haircut_light_skin_tone": "💇🏻\u200d♀️",
+    "woman_getting_haircut_medium-dark_skin_tone": "💇🏾\u200d♀️",
+    "woman_getting_haircut_medium-light_skin_tone": "💇🏼\u200d♀️",
+    "woman_getting_haircut_medium_skin_tone": "💇🏽\u200d♀️",
+    "woman_getting_massage": "💆\u200d♀️",
+    "woman_getting_massage_dark_skin_tone": "💆🏿\u200d♀️",
+    "woman_getting_massage_light_skin_tone": "💆🏻\u200d♀️",
+    "woman_getting_massage_medium-dark_skin_tone": "💆🏾\u200d♀️",
+    "woman_getting_massage_medium-light_skin_tone": "💆🏼\u200d♀️",
+    "woman_getting_massage_medium_skin_tone": "💆🏽\u200d♀️",
+    "woman_golfing": "🏌️\u200d♀️",
+    "woman_golfing_dark_skin_tone": "🏌🏿\u200d♀️",
+    "woman_golfing_light_skin_tone": "🏌🏻\u200d♀️",
+    "woman_golfing_medium-dark_skin_tone": "🏌🏾\u200d♀️",
+    "woman_golfing_medium-light_skin_tone": "🏌🏼\u200d♀️",
+    "woman_golfing_medium_skin_tone": "🏌🏽\u200d♀️",
+    "woman_guard": "💂\u200d♀️",
+    "woman_guard_dark_skin_tone": "💂🏿\u200d♀️",
+    "woman_guard_light_skin_tone": "💂🏻\u200d♀️",
+    "woman_guard_medium-dark_skin_tone": "💂🏾\u200d♀️",
+    "woman_guard_medium-light_skin_tone": "💂🏼\u200d♀️",
+    "woman_guard_medium_skin_tone": "💂🏽\u200d♀️",
+    "woman_health_worker": "👩\u200d⚕️",
+    "woman_health_worker_dark_skin_tone": "👩🏿\u200d⚕️",
+    "woman_health_worker_light_skin_tone": "👩🏻\u200d⚕️",
+    "woman_health_worker_medium-dark_skin_tone": "👩🏾\u200d⚕️",
+    "woman_health_worker_medium-light_skin_tone": "👩🏼\u200d⚕️",
+    "woman_health_worker_medium_skin_tone": "👩🏽\u200d⚕️",
+    "woman_in_lotus_position": "🧘\u200d♀️",
+    "woman_in_lotus_position_dark_skin_tone": "🧘🏿\u200d♀️",
+    "woman_in_lotus_position_light_skin_tone": "🧘🏻\u200d♀️",
+    "woman_in_lotus_position_medium-dark_skin_tone": "🧘🏾\u200d♀️",
+    "woman_in_lotus_position_medium-light_skin_tone": "🧘🏼\u200d♀️",
+    "woman_in_lotus_position_medium_skin_tone": "🧘🏽\u200d♀️",
+    "woman_in_manual_wheelchair": "👩\u200d🦽",
+    "woman_in_motorized_wheelchair": "👩\u200d🦼",
+    "woman_in_steamy_room": "🧖\u200d♀️",
+    "woman_in_steamy_room_dark_skin_tone": "🧖🏿\u200d♀️",
+    "woman_in_steamy_room_light_skin_tone": "🧖🏻\u200d♀️",
+    "woman_in_steamy_room_medium-dark_skin_tone": "🧖🏾\u200d♀️",
+    "woman_in_steamy_room_medium-light_skin_tone": "🧖🏼\u200d♀️",
+    "woman_in_steamy_room_medium_skin_tone": "🧖🏽\u200d♀️",
+    "woman_judge": "👩\u200d⚖️",
+    "woman_judge_dark_skin_tone": "👩🏿\u200d⚖️",
+    "woman_judge_light_skin_tone": "👩🏻\u200d⚖️",
+    "woman_judge_medium-dark_skin_tone": "👩🏾\u200d⚖️",
+    "woman_judge_medium-light_skin_tone": "👩🏼\u200d⚖️",
+    "woman_judge_medium_skin_tone": "👩🏽\u200d⚖️",
+    "woman_juggling": "🤹\u200d♀️",
+    "woman_juggling_dark_skin_tone": "🤹🏿\u200d♀️",
+    "woman_juggling_light_skin_tone": "🤹🏻\u200d♀️",
+    "woman_juggling_medium-dark_skin_tone": "🤹🏾\u200d♀️",
+    "woman_juggling_medium-light_skin_tone": "🤹🏼\u200d♀️",
+    "woman_juggling_medium_skin_tone": "🤹🏽\u200d♀️",
+    "woman_lifting_weights": "🏋️\u200d♀️",
+    "woman_lifting_weights_dark_skin_tone": "🏋🏿\u200d♀️",
+    "woman_lifting_weights_light_skin_tone": "🏋🏻\u200d♀️",
+    "woman_lifting_weights_medium-dark_skin_tone": "🏋🏾\u200d♀️",
+    "woman_lifting_weights_medium-light_skin_tone": "🏋🏼\u200d♀️",
+    "woman_lifting_weights_medium_skin_tone": "🏋🏽\u200d♀️",
+    "woman_light_skin_tone": "👩🏻",
+    "woman_mage": "🧙\u200d♀️",
+    "woman_mage_dark_skin_tone": "🧙🏿\u200d♀️",
+    "woman_mage_light_skin_tone": "🧙🏻\u200d♀️",
+    "woman_mage_medium-dark_skin_tone": "🧙🏾\u200d♀️",
+    "woman_mage_medium-light_skin_tone": "🧙🏼\u200d♀️",
+    "woman_mage_medium_skin_tone": "🧙🏽\u200d♀️",
+    "woman_mechanic": "👩\u200d🔧",
+    "woman_mechanic_dark_skin_tone": "👩🏿\u200d🔧",
+    "woman_mechanic_light_skin_tone": "👩🏻\u200d🔧",
+    "woman_mechanic_medium-dark_skin_tone": "👩🏾\u200d🔧",
+    "woman_mechanic_medium-light_skin_tone": "👩🏼\u200d🔧",
+    "woman_mechanic_medium_skin_tone": "👩🏽\u200d🔧",
+    "woman_medium-dark_skin_tone": "👩🏾",
+    "woman_medium-light_skin_tone": "👩🏼",
+    "woman_medium_skin_tone": "👩🏽",
+    "woman_mountain_biking": "🚵\u200d♀️",
+    "woman_mountain_biking_dark_skin_tone": "🚵🏿\u200d♀️",
+    "woman_mountain_biking_light_skin_tone": "🚵🏻\u200d♀️",
+    "woman_mountain_biking_medium-dark_skin_tone": "🚵🏾\u200d♀️",
+    "woman_mountain_biking_medium-light_skin_tone": "🚵🏼\u200d♀️",
+    "woman_mountain_biking_medium_skin_tone": "🚵🏽\u200d♀️",
+    "woman_office_worker": "👩\u200d💼",
+    "woman_office_worker_dark_skin_tone": "👩🏿\u200d💼",
+    "woman_office_worker_light_skin_tone": "👩🏻\u200d💼",
+    "woman_office_worker_medium-dark_skin_tone": "👩🏾\u200d💼",
+    "woman_office_worker_medium-light_skin_tone": "👩🏼\u200d💼",
+    "woman_office_worker_medium_skin_tone": "👩🏽\u200d💼",
+    "woman_pilot": "👩\u200d✈️",
+    "woman_pilot_dark_skin_tone": "👩🏿\u200d✈️",
+    "woman_pilot_light_skin_tone": "👩🏻\u200d✈️",
+    "woman_pilot_medium-dark_skin_tone": "👩🏾\u200d✈️",
+    "woman_pilot_medium-light_skin_tone": "👩🏼\u200d✈️",
+    "woman_pilot_medium_skin_tone": "👩🏽\u200d✈️",
+    "woman_playing_handball": "🤾\u200d♀️",
+    "woman_playing_handball_dark_skin_tone": "🤾🏿\u200d♀️",
+    "woman_playing_handball_light_skin_tone": "🤾🏻\u200d♀️",
+    "woman_playing_handball_medium-dark_skin_tone": "🤾🏾\u200d♀️",
+    "woman_playing_handball_medium-light_skin_tone": "🤾🏼\u200d♀️",
+    "woman_playing_handball_medium_skin_tone": "🤾🏽\u200d♀️",
+    "woman_playing_water_polo": "🤽\u200d♀️",
+    "woman_playing_water_polo_dark_skin_tone": "🤽🏿\u200d♀️",
+    "woman_playing_water_polo_light_skin_tone": "🤽🏻\u200d♀️",
+    "woman_playing_water_polo_medium-dark_skin_tone": "🤽🏾\u200d♀️",
+    "woman_playing_water_polo_medium-light_skin_tone": "🤽🏼\u200d♀️",
+    "woman_playing_water_polo_medium_skin_tone": "🤽🏽\u200d♀️",
+    "woman_police_officer": "👮\u200d♀️",
+    "woman_police_officer_dark_skin_tone": "👮🏿\u200d♀️",
+    "woman_police_officer_light_skin_tone": "👮🏻\u200d♀️",
+    "woman_police_officer_medium-dark_skin_tone": "👮🏾\u200d♀️",
+    "woman_police_officer_medium-light_skin_tone": "👮🏼\u200d♀️",
+    "woman_police_officer_medium_skin_tone": "👮🏽\u200d♀️",
+    "woman_pouting": "🙎\u200d♀️",
+    "woman_pouting_dark_skin_tone": "🙎🏿\u200d♀️",
+    "woman_pouting_light_skin_tone": "🙎🏻\u200d♀️",
+    "woman_pouting_medium-dark_skin_tone": "🙎🏾\u200d♀️",
+    "woman_pouting_medium-light_skin_tone": "🙎🏼\u200d♀️",
+    "woman_pouting_medium_skin_tone": "🙎🏽\u200d♀️",
+    "woman_raising_hand": "🙋\u200d♀️",
+    "woman_raising_hand_dark_skin_tone": "🙋🏿\u200d♀️",
+    "woman_raising_hand_light_skin_tone": "🙋🏻\u200d♀️",
+    "woman_raising_hand_medium-dark_skin_tone": "🙋🏾\u200d♀️",
+    "woman_raising_hand_medium-light_skin_tone": "🙋🏼\u200d♀️",
+    "woman_raising_hand_medium_skin_tone": "🙋🏽\u200d♀️",
+    "woman_rowing_boat": "🚣\u200d♀️",
+    "woman_rowing_boat_dark_skin_tone": "🚣🏿\u200d♀️",
+    "woman_rowing_boat_light_skin_tone": "🚣🏻\u200d♀️",
+    "woman_rowing_boat_medium-dark_skin_tone": "🚣🏾\u200d♀️",
+    "woman_rowing_boat_medium-light_skin_tone": "🚣🏼\u200d♀️",
+    "woman_rowing_boat_medium_skin_tone": "🚣🏽\u200d♀️",
+    "woman_running": "🏃\u200d♀️",
+    "woman_running_dark_skin_tone": "🏃🏿\u200d♀️",
+    "woman_running_light_skin_tone": "🏃🏻\u200d♀️",
+    "woman_running_medium-dark_skin_tone": "🏃🏾\u200d♀️",
+    "woman_running_medium-light_skin_tone": "🏃🏼\u200d♀️",
+    "woman_running_medium_skin_tone": "🏃🏽\u200d♀️",
+    "woman_scientist": "👩\u200d🔬",
+    "woman_scientist_dark_skin_tone": "👩🏿\u200d🔬",
+    "woman_scientist_light_skin_tone": "👩🏻\u200d🔬",
+    "woman_scientist_medium-dark_skin_tone": "👩🏾\u200d🔬",
+    "woman_scientist_medium-light_skin_tone": "👩🏼\u200d🔬",
+    "woman_scientist_medium_skin_tone": "👩🏽\u200d🔬",
+    "woman_shrugging": "🤷\u200d♀️",
+    "woman_shrugging_dark_skin_tone": "🤷🏿\u200d♀️",
+    "woman_shrugging_light_skin_tone": "🤷🏻\u200d♀️",
+    "woman_shrugging_medium-dark_skin_tone": "🤷🏾\u200d♀️",
+    "woman_shrugging_medium-light_skin_tone": "🤷🏼\u200d♀️",
+    "woman_shrugging_medium_skin_tone": "🤷🏽\u200d♀️",
+    "woman_singer": "👩\u200d🎤",
+    "woman_singer_dark_skin_tone": "👩🏿\u200d🎤",
+    "woman_singer_light_skin_tone": "👩🏻\u200d🎤",
+    "woman_singer_medium-dark_skin_tone": "👩🏾\u200d🎤",
+    "woman_singer_medium-light_skin_tone": "👩🏼\u200d🎤",
+    "woman_singer_medium_skin_tone": "👩🏽\u200d🎤",
+    "woman_student": "👩\u200d🎓",
+    "woman_student_dark_skin_tone": "👩🏿\u200d🎓",
+    "woman_student_light_skin_tone": "👩🏻\u200d🎓",
+    "woman_student_medium-dark_skin_tone": "👩🏾\u200d🎓",
+    "woman_student_medium-light_skin_tone": "👩🏼\u200d🎓",
+    "woman_student_medium_skin_tone": "👩🏽\u200d🎓",
+    "woman_surfing": "🏄\u200d♀️",
+    "woman_surfing_dark_skin_tone": "🏄🏿\u200d♀️",
+    "woman_surfing_light_skin_tone": "🏄🏻\u200d♀️",
+    "woman_surfing_medium-dark_skin_tone": "🏄🏾\u200d♀️",
+    "woman_surfing_medium-light_skin_tone": "🏄🏼\u200d♀️",
+    "woman_surfing_medium_skin_tone": "🏄🏽\u200d♀️",
+    "woman_swimming": "🏊\u200d♀️",
+    "woman_swimming_dark_skin_tone": "🏊🏿\u200d♀️",
+    "woman_swimming_light_skin_tone": "🏊🏻\u200d♀️",
+    "woman_swimming_medium-dark_skin_tone": "🏊🏾\u200d♀️",
+    "woman_swimming_medium-light_skin_tone": "🏊🏼\u200d♀️",
+    "woman_swimming_medium_skin_tone": "🏊🏽\u200d♀️",
+    "woman_teacher": "👩\u200d🏫",
+    "woman_teacher_dark_skin_tone": "👩🏿\u200d🏫",
+    "woman_teacher_light_skin_tone": "👩🏻\u200d🏫",
+    "woman_teacher_medium-dark_skin_tone": "👩🏾\u200d🏫",
+    "woman_teacher_medium-light_skin_tone": "👩🏼\u200d🏫",
+    "woman_teacher_medium_skin_tone": "👩🏽\u200d🏫",
+    "woman_technologist": "👩\u200d💻",
+    "woman_technologist_dark_skin_tone": "👩🏿\u200d💻",
+    "woman_technologist_light_skin_tone": "👩🏻\u200d💻",
+    "woman_technologist_medium-dark_skin_tone": "👩🏾\u200d💻",
+    "woman_technologist_medium-light_skin_tone": "👩🏼\u200d💻",
+    "woman_technologist_medium_skin_tone": "👩🏽\u200d💻",
+    "woman_tipping_hand": "💁\u200d♀️",
+    "woman_tipping_hand_dark_skin_tone": "💁🏿\u200d♀️",
+    "woman_tipping_hand_light_skin_tone": "💁🏻\u200d♀️",
+    "woman_tipping_hand_medium-dark_skin_tone": "💁🏾\u200d♀️",
+    "woman_tipping_hand_medium-light_skin_tone": "💁🏼\u200d♀️",
+    "woman_tipping_hand_medium_skin_tone": "💁🏽\u200d♀️",
+    "woman_vampire": "🧛\u200d♀️",
+    "woman_vampire_dark_skin_tone": "🧛🏿\u200d♀️",
+    "woman_vampire_light_skin_tone": "🧛🏻\u200d♀️",
+    "woman_vampire_medium-dark_skin_tone": "🧛🏾\u200d♀️",
+    "woman_vampire_medium-light_skin_tone": "🧛🏼\u200d♀️",
+    "woman_vampire_medium_skin_tone": "🧛🏽\u200d♀️",
+    "woman_walking": "🚶\u200d♀️",
+    "woman_walking_dark_skin_tone": "🚶🏿\u200d♀️",
+    "woman_walking_light_skin_tone": "🚶🏻\u200d♀️",
+    "woman_walking_medium-dark_skin_tone": "🚶🏾\u200d♀️",
+    "woman_walking_medium-light_skin_tone": "🚶🏼\u200d♀️",
+    "woman_walking_medium_skin_tone": "🚶🏽\u200d♀️",
+    "woman_wearing_turban": "👳\u200d♀️",
+    "woman_wearing_turban_dark_skin_tone": "👳🏿\u200d♀️",
+    "woman_wearing_turban_light_skin_tone": "👳🏻\u200d♀️",
+    "woman_wearing_turban_medium-dark_skin_tone": "👳🏾\u200d♀️",
+    "woman_wearing_turban_medium-light_skin_tone": "👳🏼\u200d♀️",
+    "woman_wearing_turban_medium_skin_tone": "👳🏽\u200d♀️",
+    "woman_with_headscarf": "🧕",
+    "woman_with_headscarf_dark_skin_tone": "🧕🏿",
+    "woman_with_headscarf_light_skin_tone": "🧕🏻",
+    "woman_with_headscarf_medium-dark_skin_tone": "🧕🏾",
+    "woman_with_headscarf_medium-light_skin_tone": "🧕🏼",
+    "woman_with_headscarf_medium_skin_tone": "🧕🏽",
+    "woman_with_probing_cane": "👩\u200d🦯",
+    "woman_zombie": "🧟\u200d♀️",
+    "woman’s_boot": "👢",
+    "woman’s_clothes": "👚",
+    "woman’s_hat": "👒",
+    "woman’s_sandal": "👡",
+    "women_with_bunny_ears": "👯\u200d♀️",
+    "women_wrestling": "🤼\u200d♀️",
+    "women’s_room": "🚺",
+    "woozy_face": "🥴",
+    "world_map": "🗺",
+    "worried_face": "😟",
+    "wrapped_gift": "🎁",
+    "wrench": "🔧",
+    "writing_hand": "✍",
+    "writing_hand_dark_skin_tone": "✍🏿",
+    "writing_hand_light_skin_tone": "✍🏻",
+    "writing_hand_medium-dark_skin_tone": "✍🏾",
+    "writing_hand_medium-light_skin_tone": "✍🏼",
+    "writing_hand_medium_skin_tone": "✍🏽",
+    "yarn": "🧶",
+    "yawning_face": "🥱",
+    "yellow_circle": "🟡",
+    "yellow_heart": "💛",
+    "yellow_square": "🟨",
+    "yen_banknote": "💴",
+    "yo-yo": "🪀",
+    "yin_yang": "☯",
+    "zany_face": "🤪",
+    "zebra": "🦓",
+    "zipper-mouth_face": "🤐",
+    "zombie": "🧟",
+    "zzz": "💤",
+    "åland_islands": "🇦🇽",
+    "keycap_asterisk": "*⃣",
+    "keycap_digit_eight": "8⃣",
+    "keycap_digit_five": "5⃣",
+    "keycap_digit_four": "4⃣",
+    "keycap_digit_nine": "9⃣",
+    "keycap_digit_one": "1⃣",
+    "keycap_digit_seven": "7⃣",
+    "keycap_digit_six": "6⃣",
+    "keycap_digit_three": "3⃣",
+    "keycap_digit_two": "2⃣",
+    "keycap_digit_zero": "0⃣",
+    "keycap_number_sign": "#⃣",
+    "light_skin_tone": "🏻",
+    "medium_light_skin_tone": "🏼",
+    "medium_skin_tone": "🏽",
+    "medium_dark_skin_tone": "🏾",
+    "dark_skin_tone": "🏿",
+    "regional_indicator_symbol_letter_a": "🇦",
+    "regional_indicator_symbol_letter_b": "🇧",
+    "regional_indicator_symbol_letter_c": "🇨",
+    "regional_indicator_symbol_letter_d": "🇩",
+    "regional_indicator_symbol_letter_e": "🇪",
+    "regional_indicator_symbol_letter_f": "🇫",
+    "regional_indicator_symbol_letter_g": "🇬",
+    "regional_indicator_symbol_letter_h": "🇭",
+    "regional_indicator_symbol_letter_i": "🇮",
+    "regional_indicator_symbol_letter_j": "🇯",
+    "regional_indicator_symbol_letter_k": "🇰",
+    "regional_indicator_symbol_letter_l": "🇱",
+    "regional_indicator_symbol_letter_m": "🇲",
+    "regional_indicator_symbol_letter_n": "🇳",
+    "regional_indicator_symbol_letter_o": "🇴",
+    "regional_indicator_symbol_letter_p": "🇵",
+    "regional_indicator_symbol_letter_q": "🇶",
+    "regional_indicator_symbol_letter_r": "🇷",
+    "regional_indicator_symbol_letter_s": "🇸",
+    "regional_indicator_symbol_letter_t": "🇹",
+    "regional_indicator_symbol_letter_u": "🇺",
+    "regional_indicator_symbol_letter_v": "🇻",
+    "regional_indicator_symbol_letter_w": "🇼",
+    "regional_indicator_symbol_letter_x": "🇽",
+    "regional_indicator_symbol_letter_y": "🇾",
+    "regional_indicator_symbol_letter_z": "🇿",
+    "airplane_arriving": "🛬",
+    "space_invader": "👾",
+    "football": "🏈",
+    "anger": "💢",
+    "angry": "😠",
+    "anguished": "😧",
+    "signal_strength": "📶",
+    "arrows_counterclockwise": "🔄",
+    "arrow_heading_down": "⤵",
+    "arrow_heading_up": "⤴",
+    "art": "🎨",
+    "astonished": "😲",
+    "athletic_shoe": "👟",
+    "atm": "🏧",
+    "car": "🚗",
+    "red_car": "🚗",
+    "angel": "👼",
+    "back": "🔙",
+    "badminton_racquet_and_shuttlecock": "🏸",
+    "dollar": "💵",
+    "euro": "💶",
+    "pound": "💷",
+    "yen": "💴",
+    "barber": "💈",
+    "bath": "🛀",
+    "bear": "🐻",
+    "heartbeat": "💓",
+    "beer": "🍺",
+    "no_bell": "🔕",
+    "bento": "🍱",
+    "bike": "🚲",
+    "bicyclist": "🚴",
+    "8ball": "🎱",
+    "biohazard_sign": "☣",
+    "birthday": "🎂",
+    "black_circle_for_record": "⏺",
+    "clubs": "♣",
+    "diamonds": "♦",
+    "arrow_double_down": "⏬",
+    "hearts": "♥",
+    "rewind": "⏪",
+    "black_left__pointing_double_triangle_with_vertical_bar": "⏮",
+    "arrow_backward": "◀",
+    "black_medium_small_square": "◾",
+    "question": "❓",
+    "fast_forward": "⏩",
+    "black_right__pointing_double_triangle_with_vertical_bar": "⏭",
+    "arrow_forward": "▶",
+    "black_right__pointing_triangle_with_double_vertical_bar": "⏯",
+    "arrow_right": "➡",
+    "spades": "♠",
+    "black_square_for_stop": "⏹",
+    "sunny": "☀",
+    "phone": "☎",
+    "recycle": "♻",
+    "arrow_double_up": "⏫",
+    "busstop": "🚏",
+    "date": "📅",
+    "flags": "🎏",
+    "cat2": "🐈",
+    "joy_cat": "😹",
+    "smirk_cat": "😼",
+    "chart_with_downwards_trend": "📉",
+    "chart_with_upwards_trend": "📈",
+    "chart": "💹",
+    "mega": "📣",
+    "checkered_flag": "🏁",
+    "accept": "🉑",
+    "ideograph_advantage": "🉐",
+    "congratulations": "㊗",
+    "secret": "㊙",
+    "m": "Ⓜ",
+    "city_sunset": "🌆",
+    "clapper": "🎬",
+    "clap": "👏",
+    "beers": "🍻",
+    "clock830": "🕣",
+    "clock8": "🕗",
+    "clock1130": "🕦",
+    "clock11": "🕚",
+    "clock530": "🕠",
+    "clock5": "🕔",
+    "clock430": "🕟",
+    "clock4": "🕓",
+    "clock930": "🕤",
+    "clock9": "🕘",
+    "clock130": "🕜",
+    "clock1": "🕐",
+    "clock730": "🕢",
+    "clock7": "🕖",
+    "clock630": "🕡",
+    "clock6": "🕕",
+    "clock1030": "🕥",
+    "clock10": "🕙",
+    "clock330": "🕞",
+    "clock3": "🕒",
+    "clock1230": "🕧",
+    "clock12": "🕛",
+    "clock230": "🕝",
+    "clock2": "🕑",
+    "arrows_clockwise": "🔃",
+    "repeat": "🔁",
+    "repeat_one": "🔂",
+    "closed_lock_with_key": "🔐",
+    "mailbox_closed": "📪",
+    "mailbox": "📫",
+    "cloud_with_tornado": "🌪",
+    "cocktail": "🍸",
+    "boom": "💥",
+    "compression": "🗜",
+    "confounded": "😖",
+    "confused": "😕",
+    "rice": "🍚",
+    "cow2": "🐄",
+    "cricket_bat_and_ball": "🏏",
+    "x": "❌",
+    "cry": "😢",
+    "curry": "🍛",
+    "dagger_knife": "🗡",
+    "dancer": "💃",
+    "dark_sunglasses": "🕶",
+    "dash": "💨",
+    "truck": "🚚",
+    "derelict_house_building": "🏚",
+    "diamond_shape_with_a_dot_inside": "💠",
+    "dart": "🎯",
+    "disappointed_relieved": "😥",
+    "disappointed": "😞",
+    "do_not_litter": "🚯",
+    "dog2": "🐕",
+    "flipper": "🐬",
+    "loop": "➿",
+    "bangbang": "‼",
+    "double_vertical_bar": "⏸",
+    "dove_of_peace": "🕊",
+    "small_red_triangle_down": "🔻",
+    "arrow_down_small": "🔽",
+    "arrow_down": "⬇",
+    "dromedary_camel": "🐪",
+    "e__mail": "📧",
+    "corn": "🌽",
+    "ear_of_rice": "🌾",
+    "earth_americas": "🌎",
+    "earth_asia": "🌏",
+    "earth_africa": "🌍",
+    "eight_pointed_black_star": "✴",
+    "eight_spoked_asterisk": "✳",
+    "eject_symbol": "⏏",
+    "bulb": "💡",
+    "emoji_modifier_fitzpatrick_type__1__2": "🏻",
+    "emoji_modifier_fitzpatrick_type__3": "🏼",
+    "emoji_modifier_fitzpatrick_type__4": "🏽",
+    "emoji_modifier_fitzpatrick_type__5": "🏾",
+    "emoji_modifier_fitzpatrick_type__6": "🏿",
+    "end": "🔚",
+    "email": "✉",
+    "european_castle": "🏰",
+    "european_post_office": "🏤",
+    "interrobang": "⁉",
+    "expressionless": "😑",
+    "eyeglasses": "👓",
+    "massage": "💆",
+    "yum": "😋",
+    "scream": "😱",
+    "kissing_heart": "😘",
+    "sweat": "😓",
+    "face_with_head__bandage": "🤕",
+    "triumph": "😤",
+    "mask": "😷",
+    "no_good": "🙅",
+    "ok_woman": "🙆",
+    "open_mouth": "😮",
+    "cold_sweat": "😰",
+    "stuck_out_tongue": "😛",
+    "stuck_out_tongue_closed_eyes": "😝",
+    "stuck_out_tongue_winking_eye": "😜",
+    "joy": "😂",
+    "no_mouth": "😶",
+    "santa": "🎅",
+    "fax": "📠",
+    "fearful": "😨",
+    "field_hockey_stick_and_ball": "🏑",
+    "first_quarter_moon_with_face": "🌛",
+    "fish_cake": "🍥",
+    "fishing_pole_and_fish": "🎣",
+    "facepunch": "👊",
+    "punch": "👊",
+    "flag_for_afghanistan": "🇦🇫",
+    "flag_for_albania": "🇦🇱",
+    "flag_for_algeria": "🇩🇿",
+    "flag_for_american_samoa": "🇦🇸",
+    "flag_for_andorra": "🇦🇩",
+    "flag_for_angola": "🇦🇴",
+    "flag_for_anguilla": "🇦🇮",
+    "flag_for_antarctica": "🇦🇶",
+    "flag_for_antigua_&_barbuda": "🇦🇬",
+    "flag_for_argentina": "🇦🇷",
+    "flag_for_armenia": "🇦🇲",
+    "flag_for_aruba": "🇦🇼",
+    "flag_for_ascension_island": "🇦🇨",
+    "flag_for_australia": "🇦🇺",
+    "flag_for_austria": "🇦🇹",
+    "flag_for_azerbaijan": "🇦🇿",
+    "flag_for_bahamas": "🇧🇸",
+    "flag_for_bahrain": "🇧🇭",
+    "flag_for_bangladesh": "🇧🇩",
+    "flag_for_barbados": "🇧🇧",
+    "flag_for_belarus": "🇧🇾",
+    "flag_for_belgium": "🇧🇪",
+    "flag_for_belize": "🇧🇿",
+    "flag_for_benin": "🇧🇯",
+    "flag_for_bermuda": "🇧🇲",
+    "flag_for_bhutan": "🇧🇹",
+    "flag_for_bolivia": "🇧🇴",
+    "flag_for_bosnia_&_herzegovina": "🇧🇦",
+    "flag_for_botswana": "🇧🇼",
+    "flag_for_bouvet_island": "🇧🇻",
+    "flag_for_brazil": "🇧🇷",
+    "flag_for_british_indian_ocean_territory": "🇮🇴",
+    "flag_for_british_virgin_islands": "🇻🇬",
+    "flag_for_brunei": "🇧🇳",
+    "flag_for_bulgaria": "🇧🇬",
+    "flag_for_burkina_faso": "🇧🇫",
+    "flag_for_burundi": "🇧🇮",
+    "flag_for_cambodia": "🇰🇭",
+    "flag_for_cameroon": "🇨🇲",
+    "flag_for_canada": "🇨🇦",
+    "flag_for_canary_islands": "🇮🇨",
+    "flag_for_cape_verde": "🇨🇻",
+    "flag_for_caribbean_netherlands": "🇧🇶",
+    "flag_for_cayman_islands": "🇰🇾",
+    "flag_for_central_african_republic": "🇨🇫",
+    "flag_for_ceuta_&_melilla": "🇪🇦",
+    "flag_for_chad": "🇹🇩",
+    "flag_for_chile": "🇨🇱",
+    "flag_for_china": "🇨🇳",
+    "flag_for_christmas_island": "🇨🇽",
+    "flag_for_clipperton_island": "🇨🇵",
+    "flag_for_cocos__islands": "🇨🇨",
+    "flag_for_colombia": "🇨🇴",
+    "flag_for_comoros": "🇰🇲",
+    "flag_for_congo____brazzaville": "🇨🇬",
+    "flag_for_congo____kinshasa": "🇨🇩",
+    "flag_for_cook_islands": "🇨🇰",
+    "flag_for_costa_rica": "🇨🇷",
+    "flag_for_croatia": "🇭🇷",
+    "flag_for_cuba": "🇨🇺",
+    "flag_for_curaçao": "🇨🇼",
+    "flag_for_cyprus": "🇨🇾",
+    "flag_for_czech_republic": "🇨🇿",
+    "flag_for_côte_d’ivoire": "🇨🇮",
+    "flag_for_denmark": "🇩🇰",
+    "flag_for_diego_garcia": "🇩🇬",
+    "flag_for_djibouti": "🇩🇯",
+    "flag_for_dominica": "🇩🇲",
+    "flag_for_dominican_republic": "🇩🇴",
+    "flag_for_ecuador": "🇪🇨",
+    "flag_for_egypt": "🇪🇬",
+    "flag_for_el_salvador": "🇸🇻",
+    "flag_for_equatorial_guinea": "🇬🇶",
+    "flag_for_eritrea": "🇪🇷",
+    "flag_for_estonia": "🇪🇪",
+    "flag_for_ethiopia": "🇪🇹",
+    "flag_for_european_union": "🇪🇺",
+    "flag_for_falkland_islands": "🇫🇰",
+    "flag_for_faroe_islands": "🇫🇴",
+    "flag_for_fiji": "🇫🇯",
+    "flag_for_finland": "🇫🇮",
+    "flag_for_france": "🇫🇷",
+    "flag_for_french_guiana": "🇬🇫",
+    "flag_for_french_polynesia": "🇵🇫",
+    "flag_for_french_southern_territories": "🇹🇫",
+    "flag_for_gabon": "🇬🇦",
+    "flag_for_gambia": "🇬🇲",
+    "flag_for_georgia": "🇬🇪",
+    "flag_for_germany": "🇩🇪",
+    "flag_for_ghana": "🇬🇭",
+    "flag_for_gibraltar": "🇬🇮",
+    "flag_for_greece": "🇬🇷",
+    "flag_for_greenland": "🇬🇱",
+    "flag_for_grenada": "🇬🇩",
+    "flag_for_guadeloupe": "🇬🇵",
+    "flag_for_guam": "🇬🇺",
+    "flag_for_guatemala": "🇬🇹",
+    "flag_for_guernsey": "🇬🇬",
+    "flag_for_guinea": "🇬🇳",
+    "flag_for_guinea__bissau": "🇬🇼",
+    "flag_for_guyana": "🇬🇾",
+    "flag_for_haiti": "🇭🇹",
+    "flag_for_heard_&_mcdonald_islands": "🇭🇲",
+    "flag_for_honduras": "🇭🇳",
+    "flag_for_hong_kong": "🇭🇰",
+    "flag_for_hungary": "🇭🇺",
+    "flag_for_iceland": "🇮🇸",
+    "flag_for_india": "🇮🇳",
+    "flag_for_indonesia": "🇮🇩",
+    "flag_for_iran": "🇮🇷",
+    "flag_for_iraq": "🇮🇶",
+    "flag_for_ireland": "🇮🇪",
+    "flag_for_isle_of_man": "🇮🇲",
+    "flag_for_israel": "🇮🇱",
+    "flag_for_italy": "🇮🇹",
+    "flag_for_jamaica": "🇯🇲",
+    "flag_for_japan": "🇯🇵",
+    "flag_for_jersey": "🇯🇪",
+    "flag_for_jordan": "🇯🇴",
+    "flag_for_kazakhstan": "🇰🇿",
+    "flag_for_kenya": "🇰🇪",
+    "flag_for_kiribati": "🇰🇮",
+    "flag_for_kosovo": "🇽🇰",
+    "flag_for_kuwait": "🇰🇼",
+    "flag_for_kyrgyzstan": "🇰🇬",
+    "flag_for_laos": "🇱🇦",
+    "flag_for_latvia": "🇱🇻",
+    "flag_for_lebanon": "🇱🇧",
+    "flag_for_lesotho": "🇱🇸",
+    "flag_for_liberia": "🇱🇷",
+    "flag_for_libya": "🇱🇾",
+    "flag_for_liechtenstein": "🇱🇮",
+    "flag_for_lithuania": "🇱🇹",
+    "flag_for_luxembourg": "🇱🇺",
+    "flag_for_macau": "🇲🇴",
+    "flag_for_macedonia": "🇲🇰",
+    "flag_for_madagascar": "🇲🇬",
+    "flag_for_malawi": "🇲🇼",
+    "flag_for_malaysia": "🇲🇾",
+    "flag_for_maldives": "🇲🇻",
+    "flag_for_mali": "🇲🇱",
+    "flag_for_malta": "🇲🇹",
+    "flag_for_marshall_islands": "🇲🇭",
+    "flag_for_martinique": "🇲🇶",
+    "flag_for_mauritania": "🇲🇷",
+    "flag_for_mauritius": "🇲🇺",
+    "flag_for_mayotte": "🇾🇹",
+    "flag_for_mexico": "🇲🇽",
+    "flag_for_micronesia": "🇫🇲",
+    "flag_for_moldova": "🇲🇩",
+    "flag_for_monaco": "🇲🇨",
+    "flag_for_mongolia": "🇲🇳",
+    "flag_for_montenegro": "🇲🇪",
+    "flag_for_montserrat": "🇲🇸",
+    "flag_for_morocco": "🇲🇦",
+    "flag_for_mozambique": "🇲🇿",
+    "flag_for_myanmar": "🇲🇲",
+    "flag_for_namibia": "🇳🇦",
+    "flag_for_nauru": "🇳🇷",
+    "flag_for_nepal": "🇳🇵",
+    "flag_for_netherlands": "🇳🇱",
+    "flag_for_new_caledonia": "🇳🇨",
+    "flag_for_new_zealand": "🇳🇿",
+    "flag_for_nicaragua": "🇳🇮",
+    "flag_for_niger": "🇳🇪",
+    "flag_for_nigeria": "🇳🇬",
+    "flag_for_niue": "🇳🇺",
+    "flag_for_norfolk_island": "🇳🇫",
+    "flag_for_north_korea": "🇰🇵",
+    "flag_for_northern_mariana_islands": "🇲🇵",
+    "flag_for_norway": "🇳🇴",
+    "flag_for_oman": "🇴🇲",
+    "flag_for_pakistan": "🇵🇰",
+    "flag_for_palau": "🇵🇼",
+    "flag_for_palestinian_territories": "🇵🇸",
+    "flag_for_panama": "🇵🇦",
+    "flag_for_papua_new_guinea": "🇵🇬",
+    "flag_for_paraguay": "🇵🇾",
+    "flag_for_peru": "🇵🇪",
+    "flag_for_philippines": "🇵🇭",
+    "flag_for_pitcairn_islands": "🇵🇳",
+    "flag_for_poland": "🇵🇱",
+    "flag_for_portugal": "🇵🇹",
+    "flag_for_puerto_rico": "🇵🇷",
+    "flag_for_qatar": "🇶🇦",
+    "flag_for_romania": "🇷🇴",
+    "flag_for_russia": "🇷🇺",
+    "flag_for_rwanda": "🇷🇼",
+    "flag_for_réunion": "🇷🇪",
+    "flag_for_samoa": "🇼🇸",
+    "flag_for_san_marino": "🇸🇲",
+    "flag_for_saudi_arabia": "🇸🇦",
+    "flag_for_senegal": "🇸🇳",
+    "flag_for_serbia": "🇷🇸",
+    "flag_for_seychelles": "🇸🇨",
+    "flag_for_sierra_leone": "🇸🇱",
+    "flag_for_singapore": "🇸🇬",
+    "flag_for_sint_maarten": "🇸🇽",
+    "flag_for_slovakia": "🇸🇰",
+    "flag_for_slovenia": "🇸🇮",
+    "flag_for_solomon_islands": "🇸🇧",
+    "flag_for_somalia": "🇸🇴",
+    "flag_for_south_africa": "🇿🇦",
+    "flag_for_south_georgia_&_south_sandwich_islands": "🇬🇸",
+    "flag_for_south_korea": "🇰🇷",
+    "flag_for_south_sudan": "🇸🇸",
+    "flag_for_spain": "🇪🇸",
+    "flag_for_sri_lanka": "🇱🇰",
+    "flag_for_st._barthélemy": "🇧🇱",
+    "flag_for_st._helena": "🇸🇭",
+    "flag_for_st._kitts_&_nevis": "🇰🇳",
+    "flag_for_st._lucia": "🇱🇨",
+    "flag_for_st._martin": "🇲🇫",
+    "flag_for_st._pierre_&_miquelon": "🇵🇲",
+    "flag_for_st._vincent_&_grenadines": "🇻🇨",
+    "flag_for_sudan": "🇸🇩",
+    "flag_for_suriname": "🇸🇷",
+    "flag_for_svalbard_&_jan_mayen": "🇸🇯",
+    "flag_for_swaziland": "🇸🇿",
+    "flag_for_sweden": "🇸🇪",
+    "flag_for_switzerland": "🇨🇭",
+    "flag_for_syria": "🇸🇾",
+    "flag_for_são_tomé_&_príncipe": "🇸🇹",
+    "flag_for_taiwan": "🇹🇼",
+    "flag_for_tajikistan": "🇹🇯",
+    "flag_for_tanzania": "🇹🇿",
+    "flag_for_thailand": "🇹🇭",
+    "flag_for_timor__leste": "🇹🇱",
+    "flag_for_togo": "🇹🇬",
+    "flag_for_tokelau": "🇹🇰",
+    "flag_for_tonga": "🇹🇴",
+    "flag_for_trinidad_&_tobago": "🇹🇹",
+    "flag_for_tristan_da_cunha": "🇹🇦",
+    "flag_for_tunisia": "🇹🇳",
+    "flag_for_turkey": "🇹🇷",
+    "flag_for_turkmenistan": "🇹🇲",
+    "flag_for_turks_&_caicos_islands": "🇹🇨",
+    "flag_for_tuvalu": "🇹🇻",
+    "flag_for_u.s._outlying_islands": "🇺🇲",
+    "flag_for_u.s._virgin_islands": "🇻🇮",
+    "flag_for_uganda": "🇺🇬",
+    "flag_for_ukraine": "🇺🇦",
+    "flag_for_united_arab_emirates": "🇦🇪",
+    "flag_for_united_kingdom": "🇬🇧",
+    "flag_for_united_states": "🇺🇸",
+    "flag_for_uruguay": "🇺🇾",
+    "flag_for_uzbekistan": "🇺🇿",
+    "flag_for_vanuatu": "🇻🇺",
+    "flag_for_vatican_city": "🇻🇦",
+    "flag_for_venezuela": "🇻🇪",
+    "flag_for_vietnam": "🇻🇳",
+    "flag_for_wallis_&_futuna": "🇼🇫",
+    "flag_for_western_sahara": "🇪🇭",
+    "flag_for_yemen": "🇾🇪",
+    "flag_for_zambia": "🇿🇲",
+    "flag_for_zimbabwe": "🇿🇼",
+    "flag_for_åland_islands": "🇦🇽",
+    "golf": "⛳",
+    "fleur__de__lis": "⚜",
+    "muscle": "💪",
+    "flushed": "😳",
+    "frame_with_picture": "🖼",
+    "fries": "🍟",
+    "frog": "🐸",
+    "hatched_chick": "🐥",
+    "frowning": "😦",
+    "fuelpump": "⛽",
+    "full_moon_with_face": "🌝",
+    "gem": "💎",
+    "star2": "🌟",
+    "golfer": "🏌",
+    "mortar_board": "🎓",
+    "grimacing": "😬",
+    "smile_cat": "😸",
+    "grinning": "😀",
+    "grin": "😁",
+    "heartpulse": "💗",
+    "guardsman": "💂",
+    "haircut": "💇",
+    "hamster": "🐹",
+    "raising_hand": "🙋",
+    "headphones": "🎧",
+    "hear_no_evil": "🙉",
+    "cupid": "💘",
+    "gift_heart": "💝",
+    "heart": "❤",
+    "exclamation": "❗",
+    "heavy_exclamation_mark": "❗",
+    "heavy_heart_exclamation_mark_ornament": "❣",
+    "o": "⭕",
+    "helm_symbol": "⎈",
+    "helmet_with_white_cross": "⛑",
+    "high_heel": "👠",
+    "bullettrain_side": "🚄",
+    "bullettrain_front": "🚅",
+    "high_brightness": "🔆",
+    "zap": "⚡",
+    "hocho": "🔪",
+    "knife": "🔪",
+    "bee": "🐝",
+    "traffic_light": "🚥",
+    "racehorse": "🐎",
+    "coffee": "☕",
+    "hotsprings": "♨",
+    "hourglass": "⌛",
+    "hourglass_flowing_sand": "⏳",
+    "house_buildings": "🏘",
+    "100": "💯",
+    "hushed": "😯",
+    "ice_hockey_stick_and_puck": "🏒",
+    "imp": "👿",
+    "information_desk_person": "💁",
+    "information_source": "ℹ",
+    "capital_abcd": "🔠",
+    "abc": "🔤",
+    "abcd": "🔡",
+    "1234": "🔢",
+    "symbols": "🔣",
+    "izakaya_lantern": "🏮",
+    "lantern": "🏮",
+    "jack_o_lantern": "🎃",
+    "dolls": "🎎",
+    "japanese_goblin": "👺",
+    "japanese_ogre": "👹",
+    "beginner": "🔰",
+    "zero": "0️⃣",
+    "one": "1️⃣",
+    "ten": "🔟",
+    "two": "2️⃣",
+    "three": "3️⃣",
+    "four": "4️⃣",
+    "five": "5️⃣",
+    "six": "6️⃣",
+    "seven": "7️⃣",
+    "eight": "8️⃣",
+    "nine": "9️⃣",
+    "couplekiss": "💏",
+    "kissing_cat": "😽",
+    "kissing": "😗",
+    "kissing_closed_eyes": "😚",
+    "kissing_smiling_eyes": "😙",
+    "beetle": "🐞",
+    "large_blue_circle": "🔵",
+    "last_quarter_moon_with_face": "🌜",
+    "leaves": "🍃",
+    "mag": "🔍",
+    "left_right_arrow": "↔",
+    "leftwards_arrow_with_hook": "↩",
+    "arrow_left": "⬅",
+    "lock": "🔒",
+    "lock_with_ink_pen": "🔏",
+    "sob": "😭",
+    "low_brightness": "🔅",
+    "lower_left_ballpoint_pen": "🖊",
+    "lower_left_crayon": "🖍",
+    "lower_left_fountain_pen": "🖋",
+    "lower_left_paintbrush": "🖌",
+    "mahjong": "🀄",
+    "couple": "👫",
+    "man_in_business_suit_levitating": "🕴",
+    "man_with_gua_pi_mao": "👲",
+    "man_with_turban": "👳",
+    "mans_shoe": "👞",
+    "shoe": "👞",
+    "menorah_with_nine_branches": "🕎",
+    "mens": "🚹",
+    "minidisc": "💽",
+    "iphone": "📱",
+    "calling": "📲",
+    "money__mouth_face": "🤑",
+    "moneybag": "💰",
+    "rice_scene": "🎑",
+    "mountain_bicyclist": "🚵",
+    "mouse2": "🐁",
+    "lips": "👄",
+    "moyai": "🗿",
+    "notes": "🎶",
+    "nail_care": "💅",
+    "ab": "🆎",
+    "negative_squared_cross_mark": "❎",
+    "a": "🅰",
+    "b": "🅱",
+    "o2": "🅾",
+    "parking": "🅿",
+    "new_moon_with_face": "🌚",
+    "no_entry_sign": "🚫",
+    "underage": "🔞",
+    "non__potable_water": "🚱",
+    "arrow_upper_right": "↗",
+    "arrow_upper_left": "↖",
+    "office": "🏢",
+    "older_man": "👴",
+    "older_woman": "👵",
+    "om_symbol": "🕉",
+    "on": "🔛",
+    "book": "📖",
+    "unlock": "🔓",
+    "mailbox_with_no_mail": "📭",
+    "mailbox_with_mail": "📬",
+    "cd": "💿",
+    "tada": "🎉",
+    "feet": "🐾",
+    "walking": "🚶",
+    "pencil2": "✏",
+    "pensive": "😔",
+    "persevere": "😣",
+    "bow": "🙇",
+    "raised_hands": "🙌",
+    "person_with_ball": "⛹",
+    "person_with_blond_hair": "👱",
+    "pray": "🙏",
+    "person_with_pouting_face": "🙎",
+    "computer": "💻",
+    "pig2": "🐖",
+    "hankey": "💩",
+    "poop": "💩",
+    "shit": "💩",
+    "bamboo": "🎍",
+    "gun": "🔫",
+    "black_joker": "🃏",
+    "rotating_light": "🚨",
+    "cop": "👮",
+    "stew": "🍲",
+    "pouch": "👝",
+    "pouting_cat": "😾",
+    "rage": "😡",
+    "put_litter_in_its_place": "🚮",
+    "rabbit2": "🐇",
+    "racing_motorcycle": "🏍",
+    "radioactive_sign": "☢",
+    "fist": "✊",
+    "hand": "✋",
+    "raised_hand_with_fingers_splayed": "🖐",
+    "raised_hand_with_part_between_middle_and_ring_fingers": "🖖",
+    "blue_car": "🚙",
+    "apple": "🍎",
+    "relieved": "😌",
+    "reversed_hand_with_middle_finger_extended": "🖕",
+    "mag_right": "🔎",
+    "arrow_right_hook": "↪",
+    "sweet_potato": "🍠",
+    "robot": "🤖",
+    "rolled__up_newspaper": "🗞",
+    "rowboat": "🚣",
+    "runner": "🏃",
+    "running": "🏃",
+    "running_shirt_with_sash": "🎽",
+    "boat": "⛵",
+    "scales": "⚖",
+    "school_satchel": "🎒",
+    "scorpius": "♏",
+    "see_no_evil": "🙈",
+    "sheep": "🐑",
+    "stars": "🌠",
+    "cake": "🍰",
+    "six_pointed_star": "🔯",
+    "ski": "🎿",
+    "sleeping_accommodation": "🛌",
+    "sleeping": "😴",
+    "sleepy": "😪",
+    "sleuth_or_spy": "🕵",
+    "heart_eyes_cat": "😻",
+    "smiley_cat": "😺",
+    "innocent": "😇",
+    "heart_eyes": "😍",
+    "smiling_imp": "😈",
+    "smiley": "😃",
+    "sweat_smile": "😅",
+    "smile": "😄",
+    "laughing": "😆",
+    "satisfied": "😆",
+    "blush": "😊",
+    "smirk": "😏",
+    "smoking": "🚬",
+    "snow_capped_mountain": "🏔",
+    "soccer": "⚽",
+    "icecream": "🍦",
+    "soon": "🔜",
+    "arrow_lower_right": "↘",
+    "arrow_lower_left": "↙",
+    "speak_no_evil": "🙊",
+    "speaker": "🔈",
+    "mute": "🔇",
+    "sound": "🔉",
+    "loud_sound": "🔊",
+    "speaking_head_in_silhouette": "🗣",
+    "spiral_calendar_pad": "🗓",
+    "spiral_note_pad": "🗒",
+    "shell": "🐚",
+    "sweat_drops": "💦",
+    "u5272": "🈹",
+    "u5408": "🈴",
+    "u55b6": "🈺",
+    "u6307": "🈯",
+    "u6708": "🈷",
+    "u6709": "🈶",
+    "u6e80": "🈵",
+    "u7121": "🈚",
+    "u7533": "🈸",
+    "u7981": "🈲",
+    "u7a7a": "🈳",
+    "cl": "🆑",
+    "cool": "🆒",
+    "free": "🆓",
+    "id": "🆔",
+    "koko": "🈁",
+    "sa": "🈂",
+    "new": "🆕",
+    "ng": "🆖",
+    "ok": "🆗",
+    "sos": "🆘",
+    "up": "🆙",
+    "vs": "🆚",
+    "steam_locomotive": "🚂",
+    "ramen": "🍜",
+    "partly_sunny": "⛅",
+    "city_sunrise": "🌇",
+    "surfer": "🏄",
+    "swimmer": "🏊",
+    "shirt": "👕",
+    "tshirt": "👕",
+    "table_tennis_paddle_and_ball": "🏓",
+    "tea": "🍵",
+    "tv": "📺",
+    "three_button_mouse": "🖱",
+    "+1": "👍",
+    "thumbsup": "👍",
+    "__1": "👎",
+    "-1": "👎",
+    "thumbsdown": "👎",
+    "thunder_cloud_and_rain": "⛈",
+    "tiger2": "🐅",
+    "tophat": "🎩",
+    "top": "🔝",
+    "tm": "™",
+    "train2": "🚆",
+    "triangular_flag_on_post": "🚩",
+    "trident": "🔱",
+    "twisted_rightwards_arrows": "🔀",
+    "unamused": "😒",
+    "small_red_triangle": "🔺",
+    "arrow_up_small": "🔼",
+    "arrow_up_down": "↕",
+    "upside__down_face": "🙃",
+    "arrow_up": "⬆",
+    "v": "✌",
+    "vhs": "📼",
+    "wc": "🚾",
+    "ocean": "🌊",
+    "waving_black_flag": "🏴",
+    "wave": "👋",
+    "waving_white_flag": "🏳",
+    "moon": "🌔",
+    "scream_cat": "🙀",
+    "weary": "😩",
+    "weight_lifter": "🏋",
+    "whale2": "🐋",
+    "wheelchair": "♿",
+    "point_down": "👇",
+    "grey_exclamation": "❕",
+    "white_frowning_face": "☹",
+    "white_check_mark": "✅",
+    "point_left": "👈",
+    "white_medium_small_square": "◽",
+    "star": "⭐",
+    "grey_question": "❔",
+    "point_right": "👉",
+    "relaxed": "☺",
+    "white_sun_behind_cloud": "🌥",
+    "white_sun_behind_cloud_with_rain": "🌦",
+    "white_sun_with_small_cloud": "🌤",
+    "point_up_2": "👆",
+    "point_up": "☝",
+    "wind_blowing_face": "🌬",
+    "wink": "😉",
+    "wolf": "🐺",
+    "dancers": "👯",
+    "boot": "👢",
+    "womans_clothes": "👚",
+    "womans_hat": "👒",
+    "sandal": "👡",
+    "womens": "🚺",
+    "worried": "😟",
+    "gift": "🎁",
+    "zipper__mouth_face": "🤐",
+    "regional_indicator_a": "🇦",
+    "regional_indicator_b": "🇧",
+    "regional_indicator_c": "🇨",
+    "regional_indicator_d": "🇩",
+    "regional_indicator_e": "🇪",
+    "regional_indicator_f": "🇫",
+    "regional_indicator_g": "🇬",
+    "regional_indicator_h": "🇭",
+    "regional_indicator_i": "🇮",
+    "regional_indicator_j": "🇯",
+    "regional_indicator_k": "🇰",
+    "regional_indicator_l": "🇱",
+    "regional_indicator_m": "🇲",
+    "regional_indicator_n": "🇳",
+    "regional_indicator_o": "🇴",
+    "regional_indicator_p": "🇵",
+    "regional_indicator_q": "🇶",
+    "regional_indicator_r": "🇷",
+    "regional_indicator_s": "🇸",
+    "regional_indicator_t": "🇹",
+    "regional_indicator_u": "🇺",
+    "regional_indicator_v": "🇻",
+    "regional_indicator_w": "🇼",
+    "regional_indicator_x": "🇽",
+    "regional_indicator_y": "🇾",
+    "regional_indicator_z": "🇿",
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_replace.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_replace.py
new file mode 100644
index 0000000..bb2cafa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_emoji_replace.py
@@ -0,0 +1,32 @@
+from typing import Callable, Match, Optional
+import re
+
+from ._emoji_codes import EMOJI
+
+
+_ReStringMatch = Match[str]  # regex match object
+_ReSubCallable = Callable[[_ReStringMatch], str]  # Callable invoked by re.sub
+_EmojiSubMethod = Callable[[_ReSubCallable, str], str]  # Sub method of a compiled re
+
+
+def _emoji_replace(
+    text: str,
+    default_variant: Optional[str] = None,
+    _emoji_sub: _EmojiSubMethod = re.compile(r"(:(\S*?)(?:(?:\-)(emoji|text))?:)").sub,
+) -> str:
+    """Replace emoji code in text."""
+    get_emoji = EMOJI.__getitem__
+    variants = {"text": "\uFE0E", "emoji": "\uFE0F"}
+    get_variant = variants.get
+    default_variant_code = variants.get(default_variant, "") if default_variant else ""
+
+    def do_replace(match: Match[str]) -> str:
+        emoji_code, emoji_name, variant = match.groups()
+        try:
+            return get_emoji(emoji_name.lower()) + get_variant(
+                variant, default_variant_code
+            )
+        except KeyError:
+            return emoji_code
+
+    return _emoji_sub(do_replace, text)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_export_format.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_export_format.py
new file mode 100644
index 0000000..b79c130
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_export_format.py
@@ -0,0 +1,78 @@
+CONSOLE_HTML_FORMAT = """\
+<!DOCTYPE html>
+<head>
+<meta charset="UTF-8">
+<style>
+{stylesheet}
+body {{
+    color: {foreground};
+    background-color: {background};
+}}
+</style>
+</head>
+<html>
+<body>
+    <code>
+        <pre style="font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace">{code}</pre>
+    </code>
+</body>
+</html>
+"""
+
+CONSOLE_SVG_FORMAT = """\
+<svg class="rich-terminal" viewBox="0 0 {width} {height}" xmlns="http://www.w3.org/2000/svg">
+    <!-- Generated with Rich https://www.textualize.io -->
+    <style>
+
+    @font-face {{
+        font-family: "Fira Code";
+        src: local("FiraCode-Regular"),
+                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff2/FiraCode-Regular.woff2") format("woff2"),
+                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff/FiraCode-Regular.woff") format("woff");
+        font-style: normal;
+        font-weight: 400;
+    }}
+    @font-face {{
+        font-family: "Fira Code";
+        src: local("FiraCode-Bold"),
+                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff2/FiraCode-Bold.woff2") format("woff2"),
+                url("https://cdnjs.cloudflare.com/ajax/libs/firacode/6.2.0/woff/FiraCode-Bold.woff") format("woff");
+        font-style: bold;
+        font-weight: 700;
+    }}
+
+    .{unique_id}-matrix {{
+        font-family: Fira Code, monospace;
+        font-size: {char_height}px;
+        line-height: {line_height}px;
+        font-variant-east-asian: full-width;
+    }}
+
+    .{unique_id}-title {{
+        font-size: 18px;
+        font-weight: bold;
+        font-family: arial;
+    }}
+
+    {styles}
+    </style>
+
+    <defs>
+    <clipPath id="{unique_id}-clip-terminal">
+      <rect x="0" y="0" width="{terminal_width}" height="{terminal_height}" />
+    </clipPath>
+    {lines}
+    </defs>
+
+    {chrome}
+    <g transform="translate({terminal_x}, {terminal_y})" clip-path="url(#{unique_id}-clip-terminal)">
+    {backgrounds}
+    <g class="{unique_id}-matrix">
+    {matrix}
+    </g>
+    </g>
+</svg>
+"""
+
+_SVG_FONT_FAMILY = "Rich Fira Code"
+_SVG_CLASSES_PREFIX = "rich-svg"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_extension.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_extension.py
new file mode 100644
index 0000000..cbd6da9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_extension.py
@@ -0,0 +1,10 @@
+from typing import Any
+
+
+def load_ipython_extension(ip: Any) -> None:  # pragma: no cover
+    # prevent circular import
+    from pip._vendor.rich.pretty import install
+    from pip._vendor.rich.traceback import install as tr_install
+
+    install()
+    tr_install()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_inspect.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_inspect.py
new file mode 100644
index 0000000..30446ce
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_inspect.py
@@ -0,0 +1,270 @@
+from __future__ import absolute_import
+
+import inspect
+from inspect import cleandoc, getdoc, getfile, isclass, ismodule, signature
+from typing import Any, Collection, Iterable, Optional, Tuple, Type, Union
+
+from .console import Group, RenderableType
+from .control import escape_control_codes
+from .highlighter import ReprHighlighter
+from .jupyter import JupyterMixin
+from .panel import Panel
+from .pretty import Pretty
+from .table import Table
+from .text import Text, TextType
+
+
+def _first_paragraph(doc: str) -> str:
+    """Get the first paragraph from a docstring."""
+    paragraph, _, _ = doc.partition("\n\n")
+    return paragraph
+
+
+class Inspect(JupyterMixin):
+    """A renderable to inspect any Python Object.
+
+    Args:
+        obj (Any): An object to inspect.
+        title (str, optional): Title to display over inspect result, or None use type. Defaults to None.
+        help (bool, optional): Show full help text rather than just first paragraph. Defaults to False.
+        methods (bool, optional): Enable inspection of callables. Defaults to False.
+        docs (bool, optional): Also render doc strings. Defaults to True.
+        private (bool, optional): Show private attributes (beginning with underscore). Defaults to False.
+        dunder (bool, optional): Show attributes starting with double underscore. Defaults to False.
+        sort (bool, optional): Sort attributes alphabetically. Defaults to True.
+        all (bool, optional): Show all attributes. Defaults to False.
+        value (bool, optional): Pretty print value of object. Defaults to True.
+    """
+
+    def __init__(
+        self,
+        obj: Any,
+        *,
+        title: Optional[TextType] = None,
+        help: bool = False,
+        methods: bool = False,
+        docs: bool = True,
+        private: bool = False,
+        dunder: bool = False,
+        sort: bool = True,
+        all: bool = True,
+        value: bool = True,
+    ) -> None:
+        self.highlighter = ReprHighlighter()
+        self.obj = obj
+        self.title = title or self._make_title(obj)
+        if all:
+            methods = private = dunder = True
+        self.help = help
+        self.methods = methods
+        self.docs = docs or help
+        self.private = private or dunder
+        self.dunder = dunder
+        self.sort = sort
+        self.value = value
+
+    def _make_title(self, obj: Any) -> Text:
+        """Make a default title."""
+        title_str = (
+            str(obj)
+            if (isclass(obj) or callable(obj) or ismodule(obj))
+            else str(type(obj))
+        )
+        title_text = self.highlighter(title_str)
+        return title_text
+
+    def __rich__(self) -> Panel:
+        return Panel.fit(
+            Group(*self._render()),
+            title=self.title,
+            border_style="scope.border",
+            padding=(0, 1),
+        )
+
+    def _get_signature(self, name: str, obj: Any) -> Optional[Text]:
+        """Get a signature for a callable."""
+        try:
+            _signature = str(signature(obj)) + ":"
+        except ValueError:
+            _signature = "(...)"
+        except TypeError:
+            return None
+
+        source_filename: Optional[str] = None
+        try:
+            source_filename = getfile(obj)
+        except (OSError, TypeError):
+            # OSError is raised if obj has no source file, e.g. when defined in REPL.
+            pass
+
+        callable_name = Text(name, style="inspect.callable")
+        if source_filename:
+            callable_name.stylize(f"link file://{source_filename}")
+        signature_text = self.highlighter(_signature)
+
+        qualname = name or getattr(obj, "__qualname__", name)
+
+        # If obj is a module, there may be classes (which are callable) to display
+        if inspect.isclass(obj):
+            prefix = "class"
+        elif inspect.iscoroutinefunction(obj):
+            prefix = "async def"
+        else:
+            prefix = "def"
+
+        qual_signature = Text.assemble(
+            (f"{prefix} ", f"inspect.{prefix.replace(' ', '_')}"),
+            (qualname, "inspect.callable"),
+            signature_text,
+        )
+
+        return qual_signature
+
+    def _render(self) -> Iterable[RenderableType]:
+        """Render object."""
+
+        def sort_items(item: Tuple[str, Any]) -> Tuple[bool, str]:
+            key, (_error, value) = item
+            return (callable(value), key.strip("_").lower())
+
+        def safe_getattr(attr_name: str) -> Tuple[Any, Any]:
+            """Get attribute or any exception."""
+            try:
+                return (None, getattr(obj, attr_name))
+            except Exception as error:
+                return (error, None)
+
+        obj = self.obj
+        keys = dir(obj)
+        total_items = len(keys)
+        if not self.dunder:
+            keys = [key for key in keys if not key.startswith("__")]
+        if not self.private:
+            keys = [key for key in keys if not key.startswith("_")]
+        not_shown_count = total_items - len(keys)
+        items = [(key, safe_getattr(key)) for key in keys]
+        if self.sort:
+            items.sort(key=sort_items)
+
+        items_table = Table.grid(padding=(0, 1), expand=False)
+        items_table.add_column(justify="right")
+        add_row = items_table.add_row
+        highlighter = self.highlighter
+
+        if callable(obj):
+            signature = self._get_signature("", obj)
+            if signature is not None:
+                yield signature
+                yield ""
+
+        if self.docs:
+            _doc = self._get_formatted_doc(obj)
+            if _doc is not None:
+                doc_text = Text(_doc, style="inspect.help")
+                doc_text = highlighter(doc_text)
+                yield doc_text
+                yield ""
+
+        if self.value and not (isclass(obj) or callable(obj) or ismodule(obj)):
+            yield Panel(
+                Pretty(obj, indent_guides=True, max_length=10, max_string=60),
+                border_style="inspect.value.border",
+            )
+            yield ""
+
+        for key, (error, value) in items:
+            key_text = Text.assemble(
+                (
+                    key,
+                    "inspect.attr.dunder" if key.startswith("__") else "inspect.attr",
+                ),
+                (" =", "inspect.equals"),
+            )
+            if error is not None:
+                warning = key_text.copy()
+                warning.stylize("inspect.error")
+                add_row(warning, highlighter(repr(error)))
+                continue
+
+            if callable(value):
+                if not self.methods:
+                    continue
+
+                _signature_text = self._get_signature(key, value)
+                if _signature_text is None:
+                    add_row(key_text, Pretty(value, highlighter=highlighter))
+                else:
+                    if self.docs:
+                        docs = self._get_formatted_doc(value)
+                        if docs is not None:
+                            _signature_text.append("\n" if "\n" in docs else " ")
+                            doc = highlighter(docs)
+                            doc.stylize("inspect.doc")
+                            _signature_text.append(doc)
+
+                    add_row(key_text, _signature_text)
+            else:
+                add_row(key_text, Pretty(value, highlighter=highlighter))
+        if items_table.row_count:
+            yield items_table
+        elif not_shown_count:
+            yield Text.from_markup(
+                f"[b cyan]{not_shown_count}[/][i] attribute(s) not shown.[/i] "
+                f"Run [b][magenta]inspect[/]([not b]inspect[/])[/b] for options."
+            )
+
+    def _get_formatted_doc(self, object_: Any) -> Optional[str]:
+        """
+        Extract the docstring of an object, process it and returns it.
+        The processing consists in cleaning up the doctring's indentation,
+        taking only its 1st paragraph if `self.help` is not True,
+        and escape its control codes.
+
+        Args:
+            object_ (Any): the object to get the docstring from.
+
+        Returns:
+            Optional[str]: the processed docstring, or None if no docstring was found.
+        """
+        docs = getdoc(object_)
+        if docs is None:
+            return None
+        docs = cleandoc(docs).strip()
+        if not self.help:
+            docs = _first_paragraph(docs)
+        return escape_control_codes(docs)
+
+
+def get_object_types_mro(obj: Union[object, Type[Any]]) -> Tuple[type, ...]:
+    """Returns the MRO of an object's class, or of the object itself if it's a class."""
+    if not hasattr(obj, "__mro__"):
+        # N.B. we cannot use `if type(obj) is type` here because it doesn't work with
+        # some types of classes, such as the ones that use abc.ABCMeta.
+        obj = type(obj)
+    return getattr(obj, "__mro__", ())
+
+
+def get_object_types_mro_as_strings(obj: object) -> Collection[str]:
+    """
+    Returns the MRO of an object's class as full qualified names, or of the object itself if it's a class.
+
+    Examples:
+        `object_types_mro_as_strings(JSONDecoder)` will return `['json.decoder.JSONDecoder', 'builtins.object']`
+    """
+    return [
+        f'{getattr(type_, "__module__", "")}.{getattr(type_, "__qualname__", "")}'
+        for type_ in get_object_types_mro(obj)
+    ]
+
+
+def is_object_one_of_types(
+    obj: object, fully_qualified_types_names: Collection[str]
+) -> bool:
+    """
+    Returns `True` if the given object's class (or the object itself, if it's a class) has one of the
+    fully qualified names in its MRO.
+    """
+    for type_name in get_object_types_mro_as_strings(obj):
+        if type_name in fully_qualified_types_names:
+            return True
+    return False
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_log_render.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_log_render.py
new file mode 100644
index 0000000..fc16c84
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_log_render.py
@@ -0,0 +1,94 @@
+from datetime import datetime
+from typing import Iterable, List, Optional, TYPE_CHECKING, Union, Callable
+
+
+from .text import Text, TextType
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleRenderable, RenderableType
+    from .table import Table
+
+FormatTimeCallable = Callable[[datetime], Text]
+
+
+class LogRender:
+    def __init__(
+        self,
+        show_time: bool = True,
+        show_level: bool = False,
+        show_path: bool = True,
+        time_format: Union[str, FormatTimeCallable] = "[%x %X]",
+        omit_repeated_times: bool = True,
+        level_width: Optional[int] = 8,
+    ) -> None:
+        self.show_time = show_time
+        self.show_level = show_level
+        self.show_path = show_path
+        self.time_format = time_format
+        self.omit_repeated_times = omit_repeated_times
+        self.level_width = level_width
+        self._last_time: Optional[Text] = None
+
+    def __call__(
+        self,
+        console: "Console",
+        renderables: Iterable["ConsoleRenderable"],
+        log_time: Optional[datetime] = None,
+        time_format: Optional[Union[str, FormatTimeCallable]] = None,
+        level: TextType = "",
+        path: Optional[str] = None,
+        line_no: Optional[int] = None,
+        link_path: Optional[str] = None,
+    ) -> "Table":
+        from .containers import Renderables
+        from .table import Table
+
+        output = Table.grid(padding=(0, 1))
+        output.expand = True
+        if self.show_time:
+            output.add_column(style="log.time")
+        if self.show_level:
+            output.add_column(style="log.level", width=self.level_width)
+        output.add_column(ratio=1, style="log.message", overflow="fold")
+        if self.show_path and path:
+            output.add_column(style="log.path")
+        row: List["RenderableType"] = []
+        if self.show_time:
+            log_time = log_time or console.get_datetime()
+            time_format = time_format or self.time_format
+            if callable(time_format):
+                log_time_display = time_format(log_time)
+            else:
+                log_time_display = Text(log_time.strftime(time_format))
+            if log_time_display == self._last_time and self.omit_repeated_times:
+                row.append(Text(" " * len(log_time_display)))
+            else:
+                row.append(log_time_display)
+                self._last_time = log_time_display
+        if self.show_level:
+            row.append(level)
+
+        row.append(Renderables(renderables))
+        if self.show_path and path:
+            path_text = Text()
+            path_text.append(
+                path, style=f"link file://{link_path}" if link_path else ""
+            )
+            if line_no:
+                path_text.append(":")
+                path_text.append(
+                    f"{line_no}",
+                    style=f"link file://{link_path}#{line_no}" if link_path else "",
+                )
+            row.append(path_text)
+
+        output.add_row(*row)
+        return output
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console
+
+    c = Console()
+    c.print("[on blue]Hello", justify="right")
+    c.log("[on blue]hello", justify="right")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_loop.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_loop.py
new file mode 100644
index 0000000..01c6caf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_loop.py
@@ -0,0 +1,43 @@
+from typing import Iterable, Tuple, TypeVar
+
+T = TypeVar("T")
+
+
+def loop_first(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for first value."""
+    iter_values = iter(values)
+    try:
+        value = next(iter_values)
+    except StopIteration:
+        return
+    yield True, value
+    for value in iter_values:
+        yield False, value
+
+
+def loop_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value
+
+
+def loop_first_last(values: Iterable[T]) -> Iterable[Tuple[bool, bool, T]]:
+    """Iterate and generate a tuple with a flag for first and last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    first = True
+    for value in iter_values:
+        yield first, False, previous_value
+        first = False
+        previous_value = value
+    yield first, True, previous_value
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_palettes.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_palettes.py
new file mode 100644
index 0000000..3c748d3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_palettes.py
@@ -0,0 +1,309 @@
+from .palette import Palette
+
+
+# Taken from https://en.wikipedia.org/wiki/ANSI_escape_code (Windows 10 column)
+WINDOWS_PALETTE = Palette(
+    [
+        (12, 12, 12),
+        (197, 15, 31),
+        (19, 161, 14),
+        (193, 156, 0),
+        (0, 55, 218),
+        (136, 23, 152),
+        (58, 150, 221),
+        (204, 204, 204),
+        (118, 118, 118),
+        (231, 72, 86),
+        (22, 198, 12),
+        (249, 241, 165),
+        (59, 120, 255),
+        (180, 0, 158),
+        (97, 214, 214),
+        (242, 242, 242),
+    ]
+)
+
+# # The standard ansi colors (including bright variants)
+STANDARD_PALETTE = Palette(
+    [
+        (0, 0, 0),
+        (170, 0, 0),
+        (0, 170, 0),
+        (170, 85, 0),
+        (0, 0, 170),
+        (170, 0, 170),
+        (0, 170, 170),
+        (170, 170, 170),
+        (85, 85, 85),
+        (255, 85, 85),
+        (85, 255, 85),
+        (255, 255, 85),
+        (85, 85, 255),
+        (255, 85, 255),
+        (85, 255, 255),
+        (255, 255, 255),
+    ]
+)
+
+
+# The 256 color palette
+EIGHT_BIT_PALETTE = Palette(
+    [
+        (0, 0, 0),
+        (128, 0, 0),
+        (0, 128, 0),
+        (128, 128, 0),
+        (0, 0, 128),
+        (128, 0, 128),
+        (0, 128, 128),
+        (192, 192, 192),
+        (128, 128, 128),
+        (255, 0, 0),
+        (0, 255, 0),
+        (255, 255, 0),
+        (0, 0, 255),
+        (255, 0, 255),
+        (0, 255, 255),
+        (255, 255, 255),
+        (0, 0, 0),
+        (0, 0, 95),
+        (0, 0, 135),
+        (0, 0, 175),
+        (0, 0, 215),
+        (0, 0, 255),
+        (0, 95, 0),
+        (0, 95, 95),
+        (0, 95, 135),
+        (0, 95, 175),
+        (0, 95, 215),
+        (0, 95, 255),
+        (0, 135, 0),
+        (0, 135, 95),
+        (0, 135, 135),
+        (0, 135, 175),
+        (0, 135, 215),
+        (0, 135, 255),
+        (0, 175, 0),
+        (0, 175, 95),
+        (0, 175, 135),
+        (0, 175, 175),
+        (0, 175, 215),
+        (0, 175, 255),
+        (0, 215, 0),
+        (0, 215, 95),
+        (0, 215, 135),
+        (0, 215, 175),
+        (0, 215, 215),
+        (0, 215, 255),
+        (0, 255, 0),
+        (0, 255, 95),
+        (0, 255, 135),
+        (0, 255, 175),
+        (0, 255, 215),
+        (0, 255, 255),
+        (95, 0, 0),
+        (95, 0, 95),
+        (95, 0, 135),
+        (95, 0, 175),
+        (95, 0, 215),
+        (95, 0, 255),
+        (95, 95, 0),
+        (95, 95, 95),
+        (95, 95, 135),
+        (95, 95, 175),
+        (95, 95, 215),
+        (95, 95, 255),
+        (95, 135, 0),
+        (95, 135, 95),
+        (95, 135, 135),
+        (95, 135, 175),
+        (95, 135, 215),
+        (95, 135, 255),
+        (95, 175, 0),
+        (95, 175, 95),
+        (95, 175, 135),
+        (95, 175, 175),
+        (95, 175, 215),
+        (95, 175, 255),
+        (95, 215, 0),
+        (95, 215, 95),
+        (95, 215, 135),
+        (95, 215, 175),
+        (95, 215, 215),
+        (95, 215, 255),
+        (95, 255, 0),
+        (95, 255, 95),
+        (95, 255, 135),
+        (95, 255, 175),
+        (95, 255, 215),
+        (95, 255, 255),
+        (135, 0, 0),
+        (135, 0, 95),
+        (135, 0, 135),
+        (135, 0, 175),
+        (135, 0, 215),
+        (135, 0, 255),
+        (135, 95, 0),
+        (135, 95, 95),
+        (135, 95, 135),
+        (135, 95, 175),
+        (135, 95, 215),
+        (135, 95, 255),
+        (135, 135, 0),
+        (135, 135, 95),
+        (135, 135, 135),
+        (135, 135, 175),
+        (135, 135, 215),
+        (135, 135, 255),
+        (135, 175, 0),
+        (135, 175, 95),
+        (135, 175, 135),
+        (135, 175, 175),
+        (135, 175, 215),
+        (135, 175, 255),
+        (135, 215, 0),
+        (135, 215, 95),
+        (135, 215, 135),
+        (135, 215, 175),
+        (135, 215, 215),
+        (135, 215, 255),
+        (135, 255, 0),
+        (135, 255, 95),
+        (135, 255, 135),
+        (135, 255, 175),
+        (135, 255, 215),
+        (135, 255, 255),
+        (175, 0, 0),
+        (175, 0, 95),
+        (175, 0, 135),
+        (175, 0, 175),
+        (175, 0, 215),
+        (175, 0, 255),
+        (175, 95, 0),
+        (175, 95, 95),
+        (175, 95, 135),
+        (175, 95, 175),
+        (175, 95, 215),
+        (175, 95, 255),
+        (175, 135, 0),
+        (175, 135, 95),
+        (175, 135, 135),
+        (175, 135, 175),
+        (175, 135, 215),
+        (175, 135, 255),
+        (175, 175, 0),
+        (175, 175, 95),
+        (175, 175, 135),
+        (175, 175, 175),
+        (175, 175, 215),
+        (175, 175, 255),
+        (175, 215, 0),
+        (175, 215, 95),
+        (175, 215, 135),
+        (175, 215, 175),
+        (175, 215, 215),
+        (175, 215, 255),
+        (175, 255, 0),
+        (175, 255, 95),
+        (175, 255, 135),
+        (175, 255, 175),
+        (175, 255, 215),
+        (175, 255, 255),
+        (215, 0, 0),
+        (215, 0, 95),
+        (215, 0, 135),
+        (215, 0, 175),
+        (215, 0, 215),
+        (215, 0, 255),
+        (215, 95, 0),
+        (215, 95, 95),
+        (215, 95, 135),
+        (215, 95, 175),
+        (215, 95, 215),
+        (215, 95, 255),
+        (215, 135, 0),
+        (215, 135, 95),
+        (215, 135, 135),
+        (215, 135, 175),
+        (215, 135, 215),
+        (215, 135, 255),
+        (215, 175, 0),
+        (215, 175, 95),
+        (215, 175, 135),
+        (215, 175, 175),
+        (215, 175, 215),
+        (215, 175, 255),
+        (215, 215, 0),
+        (215, 215, 95),
+        (215, 215, 135),
+        (215, 215, 175),
+        (215, 215, 215),
+        (215, 215, 255),
+        (215, 255, 0),
+        (215, 255, 95),
+        (215, 255, 135),
+        (215, 255, 175),
+        (215, 255, 215),
+        (215, 255, 255),
+        (255, 0, 0),
+        (255, 0, 95),
+        (255, 0, 135),
+        (255, 0, 175),
+        (255, 0, 215),
+        (255, 0, 255),
+        (255, 95, 0),
+        (255, 95, 95),
+        (255, 95, 135),
+        (255, 95, 175),
+        (255, 95, 215),
+        (255, 95, 255),
+        (255, 135, 0),
+        (255, 135, 95),
+        (255, 135, 135),
+        (255, 135, 175),
+        (255, 135, 215),
+        (255, 135, 255),
+        (255, 175, 0),
+        (255, 175, 95),
+        (255, 175, 135),
+        (255, 175, 175),
+        (255, 175, 215),
+        (255, 175, 255),
+        (255, 215, 0),
+        (255, 215, 95),
+        (255, 215, 135),
+        (255, 215, 175),
+        (255, 215, 215),
+        (255, 215, 255),
+        (255, 255, 0),
+        (255, 255, 95),
+        (255, 255, 135),
+        (255, 255, 175),
+        (255, 255, 215),
+        (255, 255, 255),
+        (8, 8, 8),
+        (18, 18, 18),
+        (28, 28, 28),
+        (38, 38, 38),
+        (48, 48, 48),
+        (58, 58, 58),
+        (68, 68, 68),
+        (78, 78, 78),
+        (88, 88, 88),
+        (98, 98, 98),
+        (108, 108, 108),
+        (118, 118, 118),
+        (128, 128, 128),
+        (138, 138, 138),
+        (148, 148, 148),
+        (158, 158, 158),
+        (168, 168, 168),
+        (178, 178, 178),
+        (188, 188, 188),
+        (198, 198, 198),
+        (208, 208, 208),
+        (218, 218, 218),
+        (228, 228, 228),
+        (238, 238, 238),
+    ]
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_pick.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_pick.py
new file mode 100644
index 0000000..4f6d8b2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_pick.py
@@ -0,0 +1,17 @@
+from typing import Optional
+
+
+def pick_bool(*values: Optional[bool]) -> bool:
+    """Pick the first non-none bool or return the last value.
+
+    Args:
+        *values (bool): Any number of boolean or None values.
+
+    Returns:
+        bool: First non-none boolean.
+    """
+    assert values, "1 or more values required"
+    for value in values:
+        if value is not None:
+            return value
+    return bool(value)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_ratio.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_ratio.py
new file mode 100644
index 0000000..e8a3a67
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_ratio.py
@@ -0,0 +1,160 @@
+import sys
+from fractions import Fraction
+from math import ceil
+from typing import cast, List, Optional, Sequence
+
+if sys.version_info >= (3, 8):
+    from typing import Protocol
+else:
+    from pip._vendor.typing_extensions import Protocol  # pragma: no cover
+
+
+class Edge(Protocol):
+    """Any object that defines an edge (such as Layout)."""
+
+    size: Optional[int] = None
+    ratio: int = 1
+    minimum_size: int = 1
+
+
+def ratio_resolve(total: int, edges: Sequence[Edge]) -> List[int]:
+    """Divide total space to satisfy size, ratio, and minimum_size, constraints.
+
+    The returned list of integers should add up to total in most cases, unless it is
+    impossible to satisfy all the constraints. For instance, if there are two edges
+    with a minimum size of 20 each and `total` is 30 then the returned list will be
+    greater than total. In practice, this would mean that a Layout object would
+    clip the rows that would overflow the screen height.
+
+    Args:
+        total (int): Total number of characters.
+        edges (List[Edge]): Edges within total space.
+
+    Returns:
+        List[int]: Number of characters for each edge.
+    """
+    # Size of edge or None for yet to be determined
+    sizes = [(edge.size or None) for edge in edges]
+
+    _Fraction = Fraction
+
+    # While any edges haven't been calculated
+    while None in sizes:
+        # Get flexible edges and index to map these back on to sizes list
+        flexible_edges = [
+            (index, edge)
+            for index, (size, edge) in enumerate(zip(sizes, edges))
+            if size is None
+        ]
+        # Remaining space in total
+        remaining = total - sum(size or 0 for size in sizes)
+        if remaining <= 0:
+            # No room for flexible edges
+            return [
+                ((edge.minimum_size or 1) if size is None else size)
+                for size, edge in zip(sizes, edges)
+            ]
+        # Calculate number of characters in a ratio portion
+        portion = _Fraction(
+            remaining, sum((edge.ratio or 1) for _, edge in flexible_edges)
+        )
+
+        # If any edges will be less than their minimum, replace size with the minimum
+        for index, edge in flexible_edges:
+            if portion * edge.ratio <= edge.minimum_size:
+                sizes[index] = edge.minimum_size
+                # New fixed size will invalidate calculations, so we need to repeat the process
+                break
+        else:
+            # Distribute flexible space and compensate for rounding error
+            # Since edge sizes can only be integers we need to add the remainder
+            # to the following line
+            remainder = _Fraction(0)
+            for index, edge in flexible_edges:
+                size, remainder = divmod(portion * edge.ratio + remainder, 1)
+                sizes[index] = size
+            break
+    # Sizes now contains integers only
+    return cast(List[int], sizes)
+
+
+def ratio_reduce(
+    total: int, ratios: List[int], maximums: List[int], values: List[int]
+) -> List[int]:
+    """Divide an integer total in to parts based on ratios.
+
+    Args:
+        total (int): The total to divide.
+        ratios (List[int]): A list of integer ratios.
+        maximums (List[int]): List of maximums values for each slot.
+        values (List[int]): List of values
+
+    Returns:
+        List[int]: A list of integers guaranteed to sum to total.
+    """
+    ratios = [ratio if _max else 0 for ratio, _max in zip(ratios, maximums)]
+    total_ratio = sum(ratios)
+    if not total_ratio:
+        return values[:]
+    total_remaining = total
+    result: List[int] = []
+    append = result.append
+    for ratio, maximum, value in zip(ratios, maximums, values):
+        if ratio and total_ratio > 0:
+            distributed = min(maximum, round(ratio * total_remaining / total_ratio))
+            append(value - distributed)
+            total_remaining -= distributed
+            total_ratio -= ratio
+        else:
+            append(value)
+    return result
+
+
+def ratio_distribute(
+    total: int, ratios: List[int], minimums: Optional[List[int]] = None
+) -> List[int]:
+    """Distribute an integer total in to parts based on ratios.
+
+    Args:
+        total (int): The total to divide.
+        ratios (List[int]): A list of integer ratios.
+        minimums (List[int]): List of minimum values for each slot.
+
+    Returns:
+        List[int]: A list of integers guaranteed to sum to total.
+    """
+    if minimums:
+        ratios = [ratio if _min else 0 for ratio, _min in zip(ratios, minimums)]
+    total_ratio = sum(ratios)
+    assert total_ratio > 0, "Sum of ratios must be > 0"
+
+    total_remaining = total
+    distributed_total: List[int] = []
+    append = distributed_total.append
+    if minimums is None:
+        _minimums = [0] * len(ratios)
+    else:
+        _minimums = minimums
+    for ratio, minimum in zip(ratios, _minimums):
+        if total_ratio > 0:
+            distributed = max(minimum, ceil(ratio * total_remaining / total_ratio))
+        else:
+            distributed = total_remaining
+        append(distributed)
+        total_ratio -= ratio
+        total_remaining -= distributed
+    return distributed_total
+
+
+if __name__ == "__main__":
+    from dataclasses import dataclass
+
+    @dataclass
+    class E:
+
+        size: Optional[int] = None
+        ratio: int = 1
+        minimum_size: int = 1
+
+    resolved = ratio_resolve(110, [E(None, 1, 1), E(None, 1, 1), E(None, 1, 1)])
+    print(sum(resolved))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_spinners.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_spinners.py
new file mode 100644
index 0000000..d0bb1fe
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_spinners.py
@@ -0,0 +1,482 @@
+"""
+Spinners are from:
+* cli-spinners:
+    MIT License
+    Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (sindresorhus.com)
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights to
+    use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+    the Software, and to permit persons to whom the Software is furnished to do so,
+    subject to the following conditions:
+    The above copyright notice and this permission notice shall be included
+    in all copies or substantial portions of the Software.
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+    INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+    PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+    FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+    ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+    IN THE SOFTWARE.
+"""
+
+SPINNERS = {
+    "dots": {
+        "interval": 80,
+        "frames": "⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏",
+    },
+    "dots2": {"interval": 80, "frames": "⣾⣽⣻⢿⡿⣟⣯⣷"},
+    "dots3": {
+        "interval": 80,
+        "frames": "⠋⠙⠚⠞⠖⠦⠴⠲⠳⠓",
+    },
+    "dots4": {
+        "interval": 80,
+        "frames": "⠄⠆⠇⠋⠙⠸⠰⠠⠰⠸⠙⠋⠇⠆",
+    },
+    "dots5": {
+        "interval": 80,
+        "frames": "⠋⠙⠚⠒⠂⠂⠒⠲⠴⠦⠖⠒⠐⠐⠒⠓⠋",
+    },
+    "dots6": {
+        "interval": 80,
+        "frames": "⠁⠉⠙⠚⠒⠂⠂⠒⠲⠴⠤⠄⠄⠤⠴⠲⠒⠂⠂⠒⠚⠙⠉⠁",
+    },
+    "dots7": {
+        "interval": 80,
+        "frames": "⠈⠉⠋⠓⠒⠐⠐⠒⠖⠦⠤⠠⠠⠤⠦⠖⠒⠐⠐⠒⠓⠋⠉⠈",
+    },
+    "dots8": {
+        "interval": 80,
+        "frames": "⠁⠁⠉⠙⠚⠒⠂⠂⠒⠲⠴⠤⠄⠄⠤⠠⠠⠤⠦⠖⠒⠐⠐⠒⠓⠋⠉⠈⠈",
+    },
+    "dots9": {"interval": 80, "frames": "⢹⢺⢼⣸⣇⡧⡗⡏"},
+    "dots10": {"interval": 80, "frames": "⢄⢂⢁⡁⡈⡐⡠"},
+    "dots11": {"interval": 100, "frames": "⠁⠂⠄⡀⢀⠠⠐⠈"},
+    "dots12": {
+        "interval": 80,
+        "frames": [
+            "⢀⠀",
+            "⡀⠀",
+            "⠄⠀",
+            "⢂⠀",
+            "⡂⠀",
+            "⠅⠀",
+            "⢃⠀",
+            "⡃⠀",
+            "⠍⠀",
+            "⢋⠀",
+            "⡋⠀",
+            "⠍⠁",
+            "⢋⠁",
+            "⡋⠁",
+            "⠍⠉",
+            "⠋⠉",
+            "⠋⠉",
+            "⠉⠙",
+            "⠉⠙",
+            "⠉⠩",
+            "⠈⢙",
+            "⠈⡙",
+            "⢈⠩",
+            "⡀⢙",
+            "⠄⡙",
+            "⢂⠩",
+            "⡂⢘",
+            "⠅⡘",
+            "⢃⠨",
+            "⡃⢐",
+            "⠍⡐",
+            "⢋⠠",
+            "⡋⢀",
+            "⠍⡁",
+            "⢋⠁",
+            "⡋⠁",
+            "⠍⠉",
+            "⠋⠉",
+            "⠋⠉",
+            "⠉⠙",
+            "⠉⠙",
+            "⠉⠩",
+            "⠈⢙",
+            "⠈⡙",
+            "⠈⠩",
+            "⠀⢙",
+            "⠀⡙",
+            "⠀⠩",
+            "⠀⢘",
+            "⠀⡘",
+            "⠀⠨",
+            "⠀⢐",
+            "⠀⡐",
+            "⠀⠠",
+            "⠀⢀",
+            "⠀⡀",
+        ],
+    },
+    "dots8Bit": {
+        "interval": 80,
+        "frames": "⠀⠁⠂⠃⠄⠅⠆⠇⡀⡁⡂⡃⡄⡅⡆⡇⠈⠉⠊⠋⠌⠍⠎⠏⡈⡉⡊⡋⡌⡍⡎⡏⠐⠑⠒⠓⠔⠕⠖⠗⡐⡑⡒⡓⡔⡕⡖⡗⠘⠙⠚⠛⠜⠝⠞⠟⡘⡙"
+        "⡚⡛⡜⡝⡞⡟⠠⠡⠢⠣⠤⠥⠦⠧⡠⡡⡢⡣⡤⡥⡦⡧⠨⠩⠪⠫⠬⠭⠮⠯⡨⡩⡪⡫⡬⡭⡮⡯⠰⠱⠲⠳⠴⠵⠶⠷⡰⡱⡲⡳⡴⡵⡶⡷⠸⠹⠺⠻"
+        "⠼⠽⠾⠿⡸⡹⡺⡻⡼⡽⡾⡿⢀⢁⢂⢃⢄⢅⢆⢇⣀⣁⣂⣃⣄⣅⣆⣇⢈⢉⢊⢋⢌⢍⢎⢏⣈⣉⣊⣋⣌⣍⣎⣏⢐⢑⢒⢓⢔⢕⢖⢗⣐⣑⣒⣓⣔⣕"
+        "⣖⣗⢘⢙⢚⢛⢜⢝⢞⢟⣘⣙⣚⣛⣜⣝⣞⣟⢠⢡⢢⢣⢤⢥⢦⢧⣠⣡⣢⣣⣤⣥⣦⣧⢨⢩⢪⢫⢬⢭⢮⢯⣨⣩⣪⣫⣬⣭⣮⣯⢰⢱⢲⢳⢴⢵⢶⢷"
+        "⣰⣱⣲⣳⣴⣵⣶⣷⢸⢹⢺⢻⢼⢽⢾⢿⣸⣹⣺⣻⣼⣽⣾⣿",
+    },
+    "line": {"interval": 130, "frames": ["-", "\\", "|", "/"]},
+    "line2": {"interval": 100, "frames": "⠂-–—–-"},
+    "pipe": {"interval": 100, "frames": "┤┘┴└├┌┬┐"},
+    "simpleDots": {"interval": 400, "frames": [".  ", ".. ", "...", "   "]},
+    "simpleDotsScrolling": {
+        "interval": 200,
+        "frames": [".  ", ".. ", "...", " ..", "  .", "   "],
+    },
+    "star": {"interval": 70, "frames": "✶✸✹✺✹✷"},
+    "star2": {"interval": 80, "frames": "+x*"},
+    "flip": {
+        "interval": 70,
+        "frames": "___-``'´-___",
+    },
+    "hamburger": {"interval": 100, "frames": "☱☲☴"},
+    "growVertical": {
+        "interval": 120,
+        "frames": "▁▃▄▅▆▇▆▅▄▃",
+    },
+    "growHorizontal": {
+        "interval": 120,
+        "frames": "▏▎▍▌▋▊▉▊▋▌▍▎",
+    },
+    "balloon": {"interval": 140, "frames": " .oO@* "},
+    "balloon2": {"interval": 120, "frames": ".oO°Oo."},
+    "noise": {"interval": 100, "frames": "▓▒░"},
+    "bounce": {"interval": 120, "frames": "⠁⠂⠄⠂"},
+    "boxBounce": {"interval": 120, "frames": "▖▘▝▗"},
+    "boxBounce2": {"interval": 100, "frames": "▌▀▐▄"},
+    "triangle": {"interval": 50, "frames": "◢◣◤◥"},
+    "arc": {"interval": 100, "frames": "◜◠◝◞◡◟"},
+    "circle": {"interval": 120, "frames": "◡⊙◠"},
+    "squareCorners": {"interval": 180, "frames": "◰◳◲◱"},
+    "circleQuarters": {"interval": 120, "frames": "◴◷◶◵"},
+    "circleHalves": {"interval": 50, "frames": "◐◓◑◒"},
+    "squish": {"interval": 100, "frames": "╫╪"},
+    "toggle": {"interval": 250, "frames": "⊶⊷"},
+    "toggle2": {"interval": 80, "frames": "▫▪"},
+    "toggle3": {"interval": 120, "frames": "□■"},
+    "toggle4": {"interval": 100, "frames": "■□▪▫"},
+    "toggle5": {"interval": 100, "frames": "▮▯"},
+    "toggle6": {"interval": 300, "frames": "ဝ၀"},
+    "toggle7": {"interval": 80, "frames": "⦾⦿"},
+    "toggle8": {"interval": 100, "frames": "◍◌"},
+    "toggle9": {"interval": 100, "frames": "◉◎"},
+    "toggle10": {"interval": 100, "frames": "㊂㊀㊁"},
+    "toggle11": {"interval": 50, "frames": "⧇⧆"},
+    "toggle12": {"interval": 120, "frames": "☗☖"},
+    "toggle13": {"interval": 80, "frames": "=*-"},
+    "arrow": {"interval": 100, "frames": "←↖↑↗→↘↓↙"},
+    "arrow2": {
+        "interval": 80,
+        "frames": ["⬆️ ", "↗️ ", "➡️ ", "↘️ ", "⬇️ ", "↙️ ", "⬅️ ", "↖️ "],
+    },
+    "arrow3": {
+        "interval": 120,
+        "frames": ["▹▹▹▹▹", "▸▹▹▹▹", "▹▸▹▹▹", "▹▹▸▹▹", "▹▹▹▸▹", "▹▹▹▹▸"],
+    },
+    "bouncingBar": {
+        "interval": 80,
+        "frames": [
+            "[    ]",
+            "[=   ]",
+            "[==  ]",
+            "[=== ]",
+            "[ ===]",
+            "[  ==]",
+            "[   =]",
+            "[    ]",
+            "[   =]",
+            "[  ==]",
+            "[ ===]",
+            "[====]",
+            "[=== ]",
+            "[==  ]",
+            "[=   ]",
+        ],
+    },
+    "bouncingBall": {
+        "interval": 80,
+        "frames": [
+            "( ●    )",
+            "(  ●   )",
+            "(   ●  )",
+            "(    ● )",
+            "(     ●)",
+            "(    ● )",
+            "(   ●  )",
+            "(  ●   )",
+            "( ●    )",
+            "(●     )",
+        ],
+    },
+    "smiley": {"interval": 200, "frames": ["😄 ", "😝 "]},
+    "monkey": {"interval": 300, "frames": ["🙈 ", "🙈 ", "🙉 ", "🙊 "]},
+    "hearts": {"interval": 100, "frames": ["💛 ", "💙 ", "💜 ", "💚 ", "❤️ "]},
+    "clock": {
+        "interval": 100,
+        "frames": [
+            "🕛 ",
+            "🕐 ",
+            "🕑 ",
+            "🕒 ",
+            "🕓 ",
+            "🕔 ",
+            "🕕 ",
+            "🕖 ",
+            "🕗 ",
+            "🕘 ",
+            "🕙 ",
+            "🕚 ",
+        ],
+    },
+    "earth": {"interval": 180, "frames": ["🌍 ", "🌎 ", "🌏 "]},
+    "material": {
+        "interval": 17,
+        "frames": [
+            "█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "██▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "███▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "██████▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "██████▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "███████▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "████████▁▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "██████████▁▁▁▁▁▁▁▁▁▁",
+            "███████████▁▁▁▁▁▁▁▁▁",
+            "█████████████▁▁▁▁▁▁▁",
+            "██████████████▁▁▁▁▁▁",
+            "██████████████▁▁▁▁▁▁",
+            "▁██████████████▁▁▁▁▁",
+            "▁██████████████▁▁▁▁▁",
+            "▁██████████████▁▁▁▁▁",
+            "▁▁██████████████▁▁▁▁",
+            "▁▁▁██████████████▁▁▁",
+            "▁▁▁▁█████████████▁▁▁",
+            "▁▁▁▁██████████████▁▁",
+            "▁▁▁▁██████████████▁▁",
+            "▁▁▁▁▁██████████████▁",
+            "▁▁▁▁▁██████████████▁",
+            "▁▁▁▁▁██████████████▁",
+            "▁▁▁▁▁▁██████████████",
+            "▁▁▁▁▁▁██████████████",
+            "▁▁▁▁▁▁▁█████████████",
+            "▁▁▁▁▁▁▁█████████████",
+            "▁▁▁▁▁▁▁▁████████████",
+            "▁▁▁▁▁▁▁▁████████████",
+            "▁▁▁▁▁▁▁▁▁███████████",
+            "▁▁▁▁▁▁▁▁▁███████████",
+            "▁▁▁▁▁▁▁▁▁▁██████████",
+            "▁▁▁▁▁▁▁▁▁▁██████████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁████████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁███████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁██████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█████",
+            "█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁████",
+            "██▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███",
+            "██▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███",
+            "███▁▁▁▁▁▁▁▁▁▁▁▁▁▁███",
+            "████▁▁▁▁▁▁▁▁▁▁▁▁▁▁██",
+            "█████▁▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "█████▁▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "██████▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "████████▁▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "█████████▁▁▁▁▁▁▁▁▁▁▁",
+            "███████████▁▁▁▁▁▁▁▁▁",
+            "████████████▁▁▁▁▁▁▁▁",
+            "████████████▁▁▁▁▁▁▁▁",
+            "██████████████▁▁▁▁▁▁",
+            "██████████████▁▁▁▁▁▁",
+            "▁██████████████▁▁▁▁▁",
+            "▁██████████████▁▁▁▁▁",
+            "▁▁▁█████████████▁▁▁▁",
+            "▁▁▁▁▁████████████▁▁▁",
+            "▁▁▁▁▁████████████▁▁▁",
+            "▁▁▁▁▁▁███████████▁▁▁",
+            "▁▁▁▁▁▁▁▁█████████▁▁▁",
+            "▁▁▁▁▁▁▁▁█████████▁▁▁",
+            "▁▁▁▁▁▁▁▁▁█████████▁▁",
+            "▁▁▁▁▁▁▁▁▁█████████▁▁",
+            "▁▁▁▁▁▁▁▁▁▁█████████▁",
+            "▁▁▁▁▁▁▁▁▁▁▁████████▁",
+            "▁▁▁▁▁▁▁▁▁▁▁████████▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁███████▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁███████▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁███████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁███████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁████",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁███",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁██",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+            "▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁",
+        ],
+    },
+    "moon": {
+        "interval": 80,
+        "frames": ["🌑 ", "🌒 ", "🌓 ", "🌔 ", "🌕 ", "🌖 ", "🌗 ", "🌘 "],
+    },
+    "runner": {"interval": 140, "frames": ["🚶 ", "🏃 "]},
+    "pong": {
+        "interval": 80,
+        "frames": [
+            "▐⠂       ▌",
+            "▐⠈       ▌",
+            "▐ ⠂      ▌",
+            "▐ ⠠      ▌",
+            "▐  ⡀     ▌",
+            "▐  ⠠     ▌",
+            "▐   ⠂    ▌",
+            "▐   ⠈    ▌",
+            "▐    ⠂   ▌",
+            "▐    ⠠   ▌",
+            "▐     ⡀  ▌",
+            "▐     ⠠  ▌",
+            "▐      ⠂ ▌",
+            "▐      ⠈ ▌",
+            "▐       ⠂▌",
+            "▐       ⠠▌",
+            "▐       ⡀▌",
+            "▐      ⠠ ▌",
+            "▐      ⠂ ▌",
+            "▐     ⠈  ▌",
+            "▐     ⠂  ▌",
+            "▐    ⠠   ▌",
+            "▐    ⡀   ▌",
+            "▐   ⠠    ▌",
+            "▐   ⠂    ▌",
+            "▐  ⠈     ▌",
+            "▐  ⠂     ▌",
+            "▐ ⠠      ▌",
+            "▐ ⡀      ▌",
+            "▐⠠       ▌",
+        ],
+    },
+    "shark": {
+        "interval": 120,
+        "frames": [
+            "▐|\\____________▌",
+            "▐_|\\___________▌",
+            "▐__|\\__________▌",
+            "▐___|\\_________▌",
+            "▐____|\\________▌",
+            "▐_____|\\_______▌",
+            "▐______|\\______▌",
+            "▐_______|\\_____▌",
+            "▐________|\\____▌",
+            "▐_________|\\___▌",
+            "▐__________|\\__▌",
+            "▐___________|\\_▌",
+            "▐____________|\\▌",
+            "▐____________/|▌",
+            "▐___________/|_▌",
+            "▐__________/|__▌",
+            "▐_________/|___▌",
+            "▐________/|____▌",
+            "▐_______/|_____▌",
+            "▐______/|______▌",
+            "▐_____/|_______▌",
+            "▐____/|________▌",
+            "▐___/|_________▌",
+            "▐__/|__________▌",
+            "▐_/|___________▌",
+            "▐/|____________▌",
+        ],
+    },
+    "dqpb": {"interval": 100, "frames": "dqpb"},
+    "weather": {
+        "interval": 100,
+        "frames": [
+            "☀️ ",
+            "☀️ ",
+            "☀️ ",
+            "🌤 ",
+            "⛅️ ",
+            "🌥 ",
+            "☁️ ",
+            "🌧 ",
+            "🌨 ",
+            "🌧 ",
+            "🌨 ",
+            "🌧 ",
+            "🌨 ",
+            "⛈ ",
+            "🌨 ",
+            "🌧 ",
+            "🌨 ",
+            "☁️ ",
+            "🌥 ",
+            "⛅️ ",
+            "🌤 ",
+            "☀️ ",
+            "☀️ ",
+        ],
+    },
+    "christmas": {"interval": 400, "frames": "🌲🎄"},
+    "grenade": {
+        "interval": 80,
+        "frames": [
+            "،   ",
+            "′   ",
+            " ´ ",
+            " ‾ ",
+            "  ⸌",
+            "  ⸊",
+            "  |",
+            "  ⁎",
+            "  ⁕",
+            " ෴ ",
+            "  ⁓",
+            "   ",
+            "   ",
+            "   ",
+        ],
+    },
+    "point": {"interval": 125, "frames": ["∙∙∙", "●∙∙", "∙●∙", "∙∙●", "∙∙∙"]},
+    "layer": {"interval": 150, "frames": "-=≡"},
+    "betaWave": {
+        "interval": 80,
+        "frames": [
+            "ρββββββ",
+            "βρβββββ",
+            "ββρββββ",
+            "βββρβββ",
+            "ββββρββ",
+            "βββββρβ",
+            "ββββββρ",
+        ],
+    },
+    "aesthetic": {
+        "interval": 80,
+        "frames": [
+            "▰▱▱▱▱▱▱",
+            "▰▰▱▱▱▱▱",
+            "▰▰▰▱▱▱▱",
+            "▰▰▰▰▱▱▱",
+            "▰▰▰▰▰▱▱",
+            "▰▰▰▰▰▰▱",
+            "▰▰▰▰▰▰▰",
+            "▰▱▱▱▱▱▱",
+        ],
+    },
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_stack.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_stack.py
new file mode 100644
index 0000000..194564e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_stack.py
@@ -0,0 +1,16 @@
+from typing import List, TypeVar
+
+T = TypeVar("T")
+
+
+class Stack(List[T]):
+    """A small shim over builtin list."""
+
+    @property
+    def top(self) -> T:
+        """Get top of stack."""
+        return self[-1]
+
+    def push(self, item: T) -> None:
+        """Push an item on to the stack (append in stack nomenclature)."""
+        self.append(item)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_timer.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_timer.py
new file mode 100644
index 0000000..a2ca6be
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_timer.py
@@ -0,0 +1,19 @@
+"""
+Timer context manager, only used in debug.
+
+"""
+
+from time import time
+
+import contextlib
+from typing import Generator
+
+
+@contextlib.contextmanager
+def timer(subject: str = "time") -> Generator[None, None, None]:
+    """print the elapsed time. (only used in debugging)"""
+    start = time()
+    yield
+    elapsed = time() - start
+    elapsed_ms = elapsed * 1000
+    print(f"{subject} elapsed {elapsed_ms:.1f}ms")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_win32_console.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_win32_console.py
new file mode 100644
index 0000000..81b1082
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_win32_console.py
@@ -0,0 +1,662 @@
+"""Light wrapper around the Win32 Console API - this module should only be imported on Windows
+
+The API that this module wraps is documented at https://docs.microsoft.com/en-us/windows/console/console-functions
+"""
+import ctypes
+import sys
+from typing import Any
+
+windll: Any = None
+if sys.platform == "win32":
+    windll = ctypes.LibraryLoader(ctypes.WinDLL)
+else:
+    raise ImportError(f"{__name__} can only be imported on Windows")
+
+import time
+from ctypes import Structure, byref, wintypes
+from typing import IO, NamedTuple, Type, cast
+
+from pip._vendor.rich.color import ColorSystem
+from pip._vendor.rich.style import Style
+
+STDOUT = -11
+ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4
+
+COORD = wintypes._COORD
+
+
+class LegacyWindowsError(Exception):
+    pass
+
+
+class WindowsCoordinates(NamedTuple):
+    """Coordinates in the Windows Console API are (y, x), not (x, y).
+    This class is intended to prevent that confusion.
+    Rows and columns are indexed from 0.
+    This class can be used in place of wintypes._COORD in arguments and argtypes.
+    """
+
+    row: int
+    col: int
+
+    @classmethod
+    def from_param(cls, value: "WindowsCoordinates") -> COORD:
+        """Converts a WindowsCoordinates into a wintypes _COORD structure.
+        This classmethod is internally called by ctypes to perform the conversion.
+
+        Args:
+            value (WindowsCoordinates): The input coordinates to convert.
+
+        Returns:
+            wintypes._COORD: The converted coordinates struct.
+        """
+        return COORD(value.col, value.row)
+
+
+class CONSOLE_SCREEN_BUFFER_INFO(Structure):
+    _fields_ = [
+        ("dwSize", COORD),
+        ("dwCursorPosition", COORD),
+        ("wAttributes", wintypes.WORD),
+        ("srWindow", wintypes.SMALL_RECT),
+        ("dwMaximumWindowSize", COORD),
+    ]
+
+
+class CONSOLE_CURSOR_INFO(ctypes.Structure):
+    _fields_ = [("dwSize", wintypes.DWORD), ("bVisible", wintypes.BOOL)]
+
+
+_GetStdHandle = windll.kernel32.GetStdHandle
+_GetStdHandle.argtypes = [
+    wintypes.DWORD,
+]
+_GetStdHandle.restype = wintypes.HANDLE
+
+
+def GetStdHandle(handle: int = STDOUT) -> wintypes.HANDLE:
+    """Retrieves a handle to the specified standard device (standard input, standard output, or standard error).
+
+    Args:
+        handle (int): Integer identifier for the handle. Defaults to -11 (stdout).
+
+    Returns:
+        wintypes.HANDLE: The handle
+    """
+    return cast(wintypes.HANDLE, _GetStdHandle(handle))
+
+
+_GetConsoleMode = windll.kernel32.GetConsoleMode
+_GetConsoleMode.argtypes = [wintypes.HANDLE, wintypes.LPDWORD]
+_GetConsoleMode.restype = wintypes.BOOL
+
+
+def GetConsoleMode(std_handle: wintypes.HANDLE) -> int:
+    """Retrieves the current input mode of a console's input buffer
+    or the current output mode of a console screen buffer.
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+
+    Raises:
+        LegacyWindowsError: If any error occurs while calling the Windows console API.
+
+    Returns:
+        int: Value representing the current console mode as documented at
+            https://docs.microsoft.com/en-us/windows/console/getconsolemode#parameters
+    """
+
+    console_mode = wintypes.DWORD()
+    success = bool(_GetConsoleMode(std_handle, console_mode))
+    if not success:
+        raise LegacyWindowsError("Unable to get legacy Windows Console Mode")
+    return console_mode.value
+
+
+_FillConsoleOutputCharacterW = windll.kernel32.FillConsoleOutputCharacterW
+_FillConsoleOutputCharacterW.argtypes = [
+    wintypes.HANDLE,
+    ctypes.c_char,
+    wintypes.DWORD,
+    cast(Type[COORD], WindowsCoordinates),
+    ctypes.POINTER(wintypes.DWORD),
+]
+_FillConsoleOutputCharacterW.restype = wintypes.BOOL
+
+
+def FillConsoleOutputCharacter(
+    std_handle: wintypes.HANDLE,
+    char: str,
+    length: int,
+    start: WindowsCoordinates,
+) -> int:
+    """Writes a character to the console screen buffer a specified number of times, beginning at the specified coordinates.
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        char (str): The character to write. Must be a string of length 1.
+        length (int): The number of times to write the character.
+        start (WindowsCoordinates): The coordinates to start writing at.
+
+    Returns:
+        int: The number of characters written.
+    """
+    character = ctypes.c_char(char.encode())
+    num_characters = wintypes.DWORD(length)
+    num_written = wintypes.DWORD(0)
+    _FillConsoleOutputCharacterW(
+        std_handle,
+        character,
+        num_characters,
+        start,
+        byref(num_written),
+    )
+    return num_written.value
+
+
+_FillConsoleOutputAttribute = windll.kernel32.FillConsoleOutputAttribute
+_FillConsoleOutputAttribute.argtypes = [
+    wintypes.HANDLE,
+    wintypes.WORD,
+    wintypes.DWORD,
+    cast(Type[COORD], WindowsCoordinates),
+    ctypes.POINTER(wintypes.DWORD),
+]
+_FillConsoleOutputAttribute.restype = wintypes.BOOL
+
+
+def FillConsoleOutputAttribute(
+    std_handle: wintypes.HANDLE,
+    attributes: int,
+    length: int,
+    start: WindowsCoordinates,
+) -> int:
+    """Sets the character attributes for a specified number of character cells,
+    beginning at the specified coordinates in a screen buffer.
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        attributes (int): Integer value representing the foreground and background colours of the cells.
+        length (int): The number of cells to set the output attribute of.
+        start (WindowsCoordinates): The coordinates of the first cell whose attributes are to be set.
+
+    Returns:
+        int: The number of cells whose attributes were actually set.
+    """
+    num_cells = wintypes.DWORD(length)
+    style_attrs = wintypes.WORD(attributes)
+    num_written = wintypes.DWORD(0)
+    _FillConsoleOutputAttribute(
+        std_handle, style_attrs, num_cells, start, byref(num_written)
+    )
+    return num_written.value
+
+
+_SetConsoleTextAttribute = windll.kernel32.SetConsoleTextAttribute
+_SetConsoleTextAttribute.argtypes = [
+    wintypes.HANDLE,
+    wintypes.WORD,
+]
+_SetConsoleTextAttribute.restype = wintypes.BOOL
+
+
+def SetConsoleTextAttribute(
+    std_handle: wintypes.HANDLE, attributes: wintypes.WORD
+) -> bool:
+    """Set the colour attributes for all text written after this function is called.
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        attributes (int): Integer value representing the foreground and background colours.
+
+
+    Returns:
+        bool: True if the attribute was set successfully, otherwise False.
+    """
+    return bool(_SetConsoleTextAttribute(std_handle, attributes))
+
+
+_GetConsoleScreenBufferInfo = windll.kernel32.GetConsoleScreenBufferInfo
+_GetConsoleScreenBufferInfo.argtypes = [
+    wintypes.HANDLE,
+    ctypes.POINTER(CONSOLE_SCREEN_BUFFER_INFO),
+]
+_GetConsoleScreenBufferInfo.restype = wintypes.BOOL
+
+
+def GetConsoleScreenBufferInfo(
+    std_handle: wintypes.HANDLE,
+) -> CONSOLE_SCREEN_BUFFER_INFO:
+    """Retrieves information about the specified console screen buffer.
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+
+    Returns:
+        CONSOLE_SCREEN_BUFFER_INFO: A CONSOLE_SCREEN_BUFFER_INFO ctype struct contain information about
+            screen size, cursor position, colour attributes, and more."""
+    console_screen_buffer_info = CONSOLE_SCREEN_BUFFER_INFO()
+    _GetConsoleScreenBufferInfo(std_handle, byref(console_screen_buffer_info))
+    return console_screen_buffer_info
+
+
+_SetConsoleCursorPosition = windll.kernel32.SetConsoleCursorPosition
+_SetConsoleCursorPosition.argtypes = [
+    wintypes.HANDLE,
+    cast(Type[COORD], WindowsCoordinates),
+]
+_SetConsoleCursorPosition.restype = wintypes.BOOL
+
+
+def SetConsoleCursorPosition(
+    std_handle: wintypes.HANDLE, coords: WindowsCoordinates
+) -> bool:
+    """Set the position of the cursor in the console screen
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        coords (WindowsCoordinates): The coordinates to move the cursor to.
+
+    Returns:
+        bool: True if the function succeeds, otherwise False.
+    """
+    return bool(_SetConsoleCursorPosition(std_handle, coords))
+
+
+_GetConsoleCursorInfo = windll.kernel32.GetConsoleCursorInfo
+_GetConsoleCursorInfo.argtypes = [
+    wintypes.HANDLE,
+    ctypes.POINTER(CONSOLE_CURSOR_INFO),
+]
+_GetConsoleCursorInfo.restype = wintypes.BOOL
+
+
+def GetConsoleCursorInfo(
+    std_handle: wintypes.HANDLE, cursor_info: CONSOLE_CURSOR_INFO
+) -> bool:
+    """Get the cursor info - used to get cursor visibility and width
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        cursor_info (CONSOLE_CURSOR_INFO): CONSOLE_CURSOR_INFO ctype struct that receives information
+            about the console's cursor.
+
+    Returns:
+          bool: True if the function succeeds, otherwise False.
+    """
+    return bool(_GetConsoleCursorInfo(std_handle, byref(cursor_info)))
+
+
+_SetConsoleCursorInfo = windll.kernel32.SetConsoleCursorInfo
+_SetConsoleCursorInfo.argtypes = [
+    wintypes.HANDLE,
+    ctypes.POINTER(CONSOLE_CURSOR_INFO),
+]
+_SetConsoleCursorInfo.restype = wintypes.BOOL
+
+
+def SetConsoleCursorInfo(
+    std_handle: wintypes.HANDLE, cursor_info: CONSOLE_CURSOR_INFO
+) -> bool:
+    """Set the cursor info - used for adjusting cursor visibility and width
+
+    Args:
+        std_handle (wintypes.HANDLE): A handle to the console input buffer or the console screen buffer.
+        cursor_info (CONSOLE_CURSOR_INFO): CONSOLE_CURSOR_INFO ctype struct containing the new cursor info.
+
+    Returns:
+          bool: True if the function succeeds, otherwise False.
+    """
+    return bool(_SetConsoleCursorInfo(std_handle, byref(cursor_info)))
+
+
+_SetConsoleTitle = windll.kernel32.SetConsoleTitleW
+_SetConsoleTitle.argtypes = [wintypes.LPCWSTR]
+_SetConsoleTitle.restype = wintypes.BOOL
+
+
+def SetConsoleTitle(title: str) -> bool:
+    """Sets the title of the current console window
+
+    Args:
+        title (str): The new title of the console window.
+
+    Returns:
+        bool: True if the function succeeds, otherwise False.
+    """
+    return bool(_SetConsoleTitle(title))
+
+
+class LegacyWindowsTerm:
+    """This class allows interaction with the legacy Windows Console API. It should only be used in the context
+    of environments where virtual terminal processing is not available. However, if it is used in a Windows environment,
+    the entire API should work.
+
+    Args:
+        file (IO[str]): The file which the Windows Console API HANDLE is retrieved from, defaults to sys.stdout.
+    """
+
+    BRIGHT_BIT = 8
+
+    # Indices are ANSI color numbers, values are the corresponding Windows Console API color numbers
+    ANSI_TO_WINDOWS = [
+        0,  # black                      The Windows colours are defined in wincon.h as follows:
+        4,  # red                         define FOREGROUND_BLUE            0x0001 -- 0000 0001
+        2,  # green                       define FOREGROUND_GREEN           0x0002 -- 0000 0010
+        6,  # yellow                      define FOREGROUND_RED             0x0004 -- 0000 0100
+        1,  # blue                        define FOREGROUND_INTENSITY       0x0008 -- 0000 1000
+        5,  # magenta                     define BACKGROUND_BLUE            0x0010 -- 0001 0000
+        3,  # cyan                        define BACKGROUND_GREEN           0x0020 -- 0010 0000
+        7,  # white                       define BACKGROUND_RED             0x0040 -- 0100 0000
+        8,  # bright black (grey)         define BACKGROUND_INTENSITY       0x0080 -- 1000 0000
+        12,  # bright red
+        10,  # bright green
+        14,  # bright yellow
+        9,  # bright blue
+        13,  # bright magenta
+        11,  # bright cyan
+        15,  # bright white
+    ]
+
+    def __init__(self, file: "IO[str]") -> None:
+        handle = GetStdHandle(STDOUT)
+        self._handle = handle
+        default_text = GetConsoleScreenBufferInfo(handle).wAttributes
+        self._default_text = default_text
+
+        self._default_fore = default_text & 7
+        self._default_back = (default_text >> 4) & 7
+        self._default_attrs = self._default_fore | (self._default_back << 4)
+
+        self._file = file
+        self.write = file.write
+        self.flush = file.flush
+
+    @property
+    def cursor_position(self) -> WindowsCoordinates:
+        """Returns the current position of the cursor (0-based)
+
+        Returns:
+            WindowsCoordinates: The current cursor position.
+        """
+        coord: COORD = GetConsoleScreenBufferInfo(self._handle).dwCursorPosition
+        return WindowsCoordinates(row=cast(int, coord.Y), col=cast(int, coord.X))
+
+    @property
+    def screen_size(self) -> WindowsCoordinates:
+        """Returns the current size of the console screen buffer, in character columns and rows
+
+        Returns:
+            WindowsCoordinates: The width and height of the screen as WindowsCoordinates.
+        """
+        screen_size: COORD = GetConsoleScreenBufferInfo(self._handle).dwSize
+        return WindowsCoordinates(
+            row=cast(int, screen_size.Y), col=cast(int, screen_size.X)
+        )
+
+    def write_text(self, text: str) -> None:
+        """Write text directly to the terminal without any modification of styles
+
+        Args:
+            text (str): The text to write to the console
+        """
+        self.write(text)
+        self.flush()
+
+    def write_styled(self, text: str, style: Style) -> None:
+        """Write styled text to the terminal.
+
+        Args:
+            text (str): The text to write
+            style (Style): The style of the text
+        """
+        color = style.color
+        bgcolor = style.bgcolor
+        if style.reverse:
+            color, bgcolor = bgcolor, color
+
+        if color:
+            fore = color.downgrade(ColorSystem.WINDOWS).number
+            fore = fore if fore is not None else 7  # Default to ANSI 7: White
+            if style.bold:
+                fore = fore | self.BRIGHT_BIT
+            if style.dim:
+                fore = fore & ~self.BRIGHT_BIT
+            fore = self.ANSI_TO_WINDOWS[fore]
+        else:
+            fore = self._default_fore
+
+        if bgcolor:
+            back = bgcolor.downgrade(ColorSystem.WINDOWS).number
+            back = back if back is not None else 0  # Default to ANSI 0: Black
+            back = self.ANSI_TO_WINDOWS[back]
+        else:
+            back = self._default_back
+
+        assert fore is not None
+        assert back is not None
+
+        SetConsoleTextAttribute(
+            self._handle, attributes=ctypes.c_ushort(fore | (back << 4))
+        )
+        self.write_text(text)
+        SetConsoleTextAttribute(self._handle, attributes=self._default_text)
+
+    def move_cursor_to(self, new_position: WindowsCoordinates) -> None:
+        """Set the position of the cursor
+
+        Args:
+            new_position (WindowsCoordinates): The WindowsCoordinates representing the new position of the cursor.
+        """
+        if new_position.col < 0 or new_position.row < 0:
+            return
+        SetConsoleCursorPosition(self._handle, coords=new_position)
+
+    def erase_line(self) -> None:
+        """Erase all content on the line the cursor is currently located at"""
+        screen_size = self.screen_size
+        cursor_position = self.cursor_position
+        cells_to_erase = screen_size.col
+        start_coordinates = WindowsCoordinates(row=cursor_position.row, col=0)
+        FillConsoleOutputCharacter(
+            self._handle, " ", length=cells_to_erase, start=start_coordinates
+        )
+        FillConsoleOutputAttribute(
+            self._handle,
+            self._default_attrs,
+            length=cells_to_erase,
+            start=start_coordinates,
+        )
+
+    def erase_end_of_line(self) -> None:
+        """Erase all content from the cursor position to the end of that line"""
+        cursor_position = self.cursor_position
+        cells_to_erase = self.screen_size.col - cursor_position.col
+        FillConsoleOutputCharacter(
+            self._handle, " ", length=cells_to_erase, start=cursor_position
+        )
+        FillConsoleOutputAttribute(
+            self._handle,
+            self._default_attrs,
+            length=cells_to_erase,
+            start=cursor_position,
+        )
+
+    def erase_start_of_line(self) -> None:
+        """Erase all content from the cursor position to the start of that line"""
+        row, col = self.cursor_position
+        start = WindowsCoordinates(row, 0)
+        FillConsoleOutputCharacter(self._handle, " ", length=col, start=start)
+        FillConsoleOutputAttribute(
+            self._handle, self._default_attrs, length=col, start=start
+        )
+
+    def move_cursor_up(self) -> None:
+        """Move the cursor up a single cell"""
+        cursor_position = self.cursor_position
+        SetConsoleCursorPosition(
+            self._handle,
+            coords=WindowsCoordinates(
+                row=cursor_position.row - 1, col=cursor_position.col
+            ),
+        )
+
+    def move_cursor_down(self) -> None:
+        """Move the cursor down a single cell"""
+        cursor_position = self.cursor_position
+        SetConsoleCursorPosition(
+            self._handle,
+            coords=WindowsCoordinates(
+                row=cursor_position.row + 1,
+                col=cursor_position.col,
+            ),
+        )
+
+    def move_cursor_forward(self) -> None:
+        """Move the cursor forward a single cell. Wrap to the next line if required."""
+        row, col = self.cursor_position
+        if col == self.screen_size.col - 1:
+            row += 1
+            col = 0
+        else:
+            col += 1
+        SetConsoleCursorPosition(
+            self._handle, coords=WindowsCoordinates(row=row, col=col)
+        )
+
+    def move_cursor_to_column(self, column: int) -> None:
+        """Move cursor to the column specified by the zero-based column index, staying on the same row
+
+        Args:
+            column (int): The zero-based column index to move the cursor to.
+        """
+        row, _ = self.cursor_position
+        SetConsoleCursorPosition(self._handle, coords=WindowsCoordinates(row, column))
+
+    def move_cursor_backward(self) -> None:
+        """Move the cursor backward a single cell. Wrap to the previous line if required."""
+        row, col = self.cursor_position
+        if col == 0:
+            row -= 1
+            col = self.screen_size.col - 1
+        else:
+            col -= 1
+        SetConsoleCursorPosition(
+            self._handle, coords=WindowsCoordinates(row=row, col=col)
+        )
+
+    def hide_cursor(self) -> None:
+        """Hide the cursor"""
+        current_cursor_size = self._get_cursor_size()
+        invisible_cursor = CONSOLE_CURSOR_INFO(dwSize=current_cursor_size, bVisible=0)
+        SetConsoleCursorInfo(self._handle, cursor_info=invisible_cursor)
+
+    def show_cursor(self) -> None:
+        """Show the cursor"""
+        current_cursor_size = self._get_cursor_size()
+        visible_cursor = CONSOLE_CURSOR_INFO(dwSize=current_cursor_size, bVisible=1)
+        SetConsoleCursorInfo(self._handle, cursor_info=visible_cursor)
+
+    def set_title(self, title: str) -> None:
+        """Set the title of the terminal window
+
+        Args:
+            title (str): The new title of the console window
+        """
+        assert len(title) < 255, "Console title must be less than 255 characters"
+        SetConsoleTitle(title)
+
+    def _get_cursor_size(self) -> int:
+        """Get the percentage of the character cell that is filled by the cursor"""
+        cursor_info = CONSOLE_CURSOR_INFO()
+        GetConsoleCursorInfo(self._handle, cursor_info=cursor_info)
+        return int(cursor_info.dwSize)
+
+
+if __name__ == "__main__":
+    handle = GetStdHandle()
+
+    from pip._vendor.rich.console import Console
+
+    console = Console()
+
+    term = LegacyWindowsTerm(sys.stdout)
+    term.set_title("Win32 Console Examples")
+
+    style = Style(color="black", bgcolor="red")
+
+    heading = Style.parse("black on green")
+
+    # Check colour output
+    console.rule("Checking colour output")
+    console.print("[on red]on red!")
+    console.print("[blue]blue!")
+    console.print("[yellow]yellow!")
+    console.print("[bold yellow]bold yellow!")
+    console.print("[bright_yellow]bright_yellow!")
+    console.print("[dim bright_yellow]dim bright_yellow!")
+    console.print("[italic cyan]italic cyan!")
+    console.print("[bold white on blue]bold white on blue!")
+    console.print("[reverse bold white on blue]reverse bold white on blue!")
+    console.print("[bold black on cyan]bold black on cyan!")
+    console.print("[black on green]black on green!")
+    console.print("[blue on green]blue on green!")
+    console.print("[white on black]white on black!")
+    console.print("[black on white]black on white!")
+    console.print("[#1BB152 on #DA812D]#1BB152 on #DA812D!")
+
+    # Check cursor movement
+    console.rule("Checking cursor movement")
+    console.print()
+    term.move_cursor_backward()
+    term.move_cursor_backward()
+    term.write_text("went back and wrapped to prev line")
+    time.sleep(1)
+    term.move_cursor_up()
+    term.write_text("we go up")
+    time.sleep(1)
+    term.move_cursor_down()
+    term.write_text("and down")
+    time.sleep(1)
+    term.move_cursor_up()
+    term.move_cursor_backward()
+    term.move_cursor_backward()
+    term.write_text("we went up and back 2")
+    time.sleep(1)
+    term.move_cursor_down()
+    term.move_cursor_backward()
+    term.move_cursor_backward()
+    term.write_text("we went down and back 2")
+    time.sleep(1)
+
+    # Check erasing of lines
+    term.hide_cursor()
+    console.print()
+    console.rule("Checking line erasing")
+    console.print("\n...Deleting to the start of the line...")
+    term.write_text("The red arrow shows the cursor location, and direction of erase")
+    time.sleep(1)
+    term.move_cursor_to_column(16)
+    term.write_styled("<", Style.parse("black on red"))
+    term.move_cursor_backward()
+    time.sleep(1)
+    term.erase_start_of_line()
+    time.sleep(1)
+
+    console.print("\n\n...And to the end of the line...")
+    term.write_text("The red arrow shows the cursor location, and direction of erase")
+    time.sleep(1)
+
+    term.move_cursor_to_column(16)
+    term.write_styled(">", Style.parse("black on red"))
+    time.sleep(1)
+    term.erase_end_of_line()
+    time.sleep(1)
+
+    console.print("\n\n...Now the whole line will be erased...")
+    term.write_styled("I'm going to disappear!", style=Style.parse("black on cyan"))
+    time.sleep(1)
+    term.erase_line()
+
+    term.show_cursor()
+    print("\n")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows.py
new file mode 100644
index 0000000..10fc0d7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows.py
@@ -0,0 +1,72 @@
+import sys
+from dataclasses import dataclass
+
+
+@dataclass
+class WindowsConsoleFeatures:
+    """Windows features available."""
+
+    vt: bool = False
+    """The console supports VT codes."""
+    truecolor: bool = False
+    """The console supports truecolor."""
+
+
+try:
+    import ctypes
+    from ctypes import LibraryLoader
+
+    if sys.platform == "win32":
+        windll = LibraryLoader(ctypes.WinDLL)
+    else:
+        windll = None
+        raise ImportError("Not windows")
+
+    from pip._vendor.rich._win32_console import (
+        ENABLE_VIRTUAL_TERMINAL_PROCESSING,
+        GetConsoleMode,
+        GetStdHandle,
+        LegacyWindowsError,
+    )
+
+except (AttributeError, ImportError, ValueError):
+
+    # Fallback if we can't load the Windows DLL
+    def get_windows_console_features() -> WindowsConsoleFeatures:
+        features = WindowsConsoleFeatures()
+        return features
+
+else:
+
+    def get_windows_console_features() -> WindowsConsoleFeatures:
+        """Get windows console features.
+
+        Returns:
+            WindowsConsoleFeatures: An instance of WindowsConsoleFeatures.
+        """
+        handle = GetStdHandle()
+        try:
+            console_mode = GetConsoleMode(handle)
+            success = True
+        except LegacyWindowsError:
+            console_mode = 0
+            success = False
+        vt = bool(success and console_mode & ENABLE_VIRTUAL_TERMINAL_PROCESSING)
+        truecolor = False
+        if vt:
+            win_version = sys.getwindowsversion()
+            truecolor = win_version.major > 10 or (
+                win_version.major == 10 and win_version.build >= 15063
+            )
+        features = WindowsConsoleFeatures(vt=vt, truecolor=truecolor)
+        return features
+
+
+if __name__ == "__main__":
+    import platform
+
+    features = get_windows_console_features()
+    from pip._vendor.rich import print
+
+    print(f'platform="{platform.system()}"')
+    print(repr(features))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows_renderer.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows_renderer.py
new file mode 100644
index 0000000..5ece056
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_windows_renderer.py
@@ -0,0 +1,56 @@
+from typing import Iterable, Sequence, Tuple, cast
+
+from pip._vendor.rich._win32_console import LegacyWindowsTerm, WindowsCoordinates
+from pip._vendor.rich.segment import ControlCode, ControlType, Segment
+
+
+def legacy_windows_render(buffer: Iterable[Segment], term: LegacyWindowsTerm) -> None:
+    """Makes appropriate Windows Console API calls based on the segments in the buffer.
+
+    Args:
+        buffer (Iterable[Segment]): Iterable of Segments to convert to Win32 API calls.
+        term (LegacyWindowsTerm): Used to call the Windows Console API.
+    """
+    for text, style, control in buffer:
+        if not control:
+            if style:
+                term.write_styled(text, style)
+            else:
+                term.write_text(text)
+        else:
+            control_codes: Sequence[ControlCode] = control
+            for control_code in control_codes:
+                control_type = control_code[0]
+                if control_type == ControlType.CURSOR_MOVE_TO:
+                    _, x, y = cast(Tuple[ControlType, int, int], control_code)
+                    term.move_cursor_to(WindowsCoordinates(row=y - 1, col=x - 1))
+                elif control_type == ControlType.CARRIAGE_RETURN:
+                    term.write_text("\r")
+                elif control_type == ControlType.HOME:
+                    term.move_cursor_to(WindowsCoordinates(0, 0))
+                elif control_type == ControlType.CURSOR_UP:
+                    term.move_cursor_up()
+                elif control_type == ControlType.CURSOR_DOWN:
+                    term.move_cursor_down()
+                elif control_type == ControlType.CURSOR_FORWARD:
+                    term.move_cursor_forward()
+                elif control_type == ControlType.CURSOR_BACKWARD:
+                    term.move_cursor_backward()
+                elif control_type == ControlType.CURSOR_MOVE_TO_COLUMN:
+                    _, column = cast(Tuple[ControlType, int], control_code)
+                    term.move_cursor_to_column(column - 1)
+                elif control_type == ControlType.HIDE_CURSOR:
+                    term.hide_cursor()
+                elif control_type == ControlType.SHOW_CURSOR:
+                    term.show_cursor()
+                elif control_type == ControlType.ERASE_IN_LINE:
+                    _, mode = cast(Tuple[ControlType, int], control_code)
+                    if mode == 0:
+                        term.erase_end_of_line()
+                    elif mode == 1:
+                        term.erase_start_of_line()
+                    elif mode == 2:
+                        term.erase_line()
+                elif control_type == ControlType.SET_WINDOW_TITLE:
+                    _, title = cast(Tuple[ControlType, str], control_code)
+                    term.set_title(title)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/_wrap.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_wrap.py
new file mode 100644
index 0000000..c45f193
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/_wrap.py
@@ -0,0 +1,56 @@
+import re
+from typing import Iterable, List, Tuple
+
+from ._loop import loop_last
+from .cells import cell_len, chop_cells
+
+re_word = re.compile(r"\s*\S+\s*")
+
+
+def words(text: str) -> Iterable[Tuple[int, int, str]]:
+    position = 0
+    word_match = re_word.match(text, position)
+    while word_match is not None:
+        start, end = word_match.span()
+        word = word_match.group(0)
+        yield start, end, word
+        word_match = re_word.match(text, end)
+
+
+def divide_line(text: str, width: int, fold: bool = True) -> List[int]:
+    divides: List[int] = []
+    append = divides.append
+    line_position = 0
+    _cell_len = cell_len
+    for start, _end, word in words(text):
+        word_length = _cell_len(word.rstrip())
+        if line_position + word_length > width:
+            if word_length > width:
+                if fold:
+                    chopped_words = chop_cells(word, max_size=width, position=0)
+                    for last, line in loop_last(chopped_words):
+                        if start:
+                            append(start)
+
+                        if last:
+                            line_position = _cell_len(line)
+                        else:
+                            start += len(line)
+                else:
+                    if start:
+                        append(start)
+                    line_position = _cell_len(word)
+            elif line_position and start:
+                append(start)
+                line_position = _cell_len(word)
+        else:
+            line_position += _cell_len(word)
+    return divides
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from .console import Console
+
+    console = Console(width=10)
+    console.print("12345 abcdefghijklmnopqrstuvwyxzABCDEFGHIJKLMNOPQRSTUVWXYZ 12345")
+    print(chop_cells("abcdefghijklmnopqrstuvwxyz", 10, position=2))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/abc.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/abc.py
new file mode 100644
index 0000000..e6e498e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/abc.py
@@ -0,0 +1,33 @@
+from abc import ABC
+
+
+class RichRenderable(ABC):
+    """An abstract base class for Rich renderables.
+
+    Note that there is no need to extend this class, the intended use is to check if an
+    object supports the Rich renderable protocol. For example::
+
+        if isinstance(my_object, RichRenderable):
+            console.print(my_object)
+
+    """
+
+    @classmethod
+    def __subclasshook__(cls, other: type) -> bool:
+        """Check if this class supports the rich render protocol."""
+        return hasattr(other, "__rich_console__") or hasattr(other, "__rich__")
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.text import Text
+
+    t = Text()
+    print(isinstance(Text, RichRenderable))
+    print(isinstance(t, RichRenderable))
+
+    class Foo:
+        pass
+
+    f = Foo()
+    print(isinstance(f, RichRenderable))
+    print(isinstance("", RichRenderable))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/align.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/align.py
new file mode 100644
index 0000000..d5abb59
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/align.py
@@ -0,0 +1,311 @@
+import sys
+from itertools import chain
+from typing import TYPE_CHECKING, Iterable, Optional
+
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+from .constrain import Constrain
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment
+from .style import StyleType
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderableType, RenderResult
+
+AlignMethod = Literal["left", "center", "right"]
+VerticalAlignMethod = Literal["top", "middle", "bottom"]
+
+
+class Align(JupyterMixin):
+    """Align a renderable by adding spaces if necessary.
+
+    Args:
+        renderable (RenderableType): A console renderable.
+        align (AlignMethod): One of "left", "center", or "right""
+        style (StyleType, optional): An optional style to apply to the background.
+        vertical (Optional[VerticalAlginMethod], optional): Optional vertical align, one of "top", "middle", or "bottom". Defaults to None.
+        pad (bool, optional): Pad the right with spaces. Defaults to True.
+        width (int, optional): Restrict contents to given width, or None to use default width. Defaults to None.
+        height (int, optional): Set height of align renderable, or None to fit to contents. Defaults to None.
+
+    Raises:
+        ValueError: if ``align`` is not one of the expected values.
+    """
+
+    def __init__(
+        self,
+        renderable: "RenderableType",
+        align: AlignMethod = "left",
+        style: Optional[StyleType] = None,
+        *,
+        vertical: Optional[VerticalAlignMethod] = None,
+        pad: bool = True,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+    ) -> None:
+        if align not in ("left", "center", "right"):
+            raise ValueError(
+                f'invalid value for align, expected "left", "center", or "right" (not {align!r})'
+            )
+        if vertical is not None and vertical not in ("top", "middle", "bottom"):
+            raise ValueError(
+                f'invalid value for vertical, expected "top", "middle", or "bottom" (not {vertical!r})'
+            )
+        self.renderable = renderable
+        self.align = align
+        self.style = style
+        self.vertical = vertical
+        self.pad = pad
+        self.width = width
+        self.height = height
+
+    def __repr__(self) -> str:
+        return f"Align({self.renderable!r}, {self.align!r})"
+
+    @classmethod
+    def left(
+        cls,
+        renderable: "RenderableType",
+        style: Optional[StyleType] = None,
+        *,
+        vertical: Optional[VerticalAlignMethod] = None,
+        pad: bool = True,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+    ) -> "Align":
+        """Align a renderable to the left."""
+        return cls(
+            renderable,
+            "left",
+            style=style,
+            vertical=vertical,
+            pad=pad,
+            width=width,
+            height=height,
+        )
+
+    @classmethod
+    def center(
+        cls,
+        renderable: "RenderableType",
+        style: Optional[StyleType] = None,
+        *,
+        vertical: Optional[VerticalAlignMethod] = None,
+        pad: bool = True,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+    ) -> "Align":
+        """Align a renderable to the center."""
+        return cls(
+            renderable,
+            "center",
+            style=style,
+            vertical=vertical,
+            pad=pad,
+            width=width,
+            height=height,
+        )
+
+    @classmethod
+    def right(
+        cls,
+        renderable: "RenderableType",
+        style: Optional[StyleType] = None,
+        *,
+        vertical: Optional[VerticalAlignMethod] = None,
+        pad: bool = True,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+    ) -> "Align":
+        """Align a renderable to the right."""
+        return cls(
+            renderable,
+            "right",
+            style=style,
+            vertical=vertical,
+            pad=pad,
+            width=width,
+            height=height,
+        )
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        align = self.align
+        width = console.measure(self.renderable, options=options).maximum
+        rendered = console.render(
+            Constrain(
+                self.renderable, width if self.width is None else min(width, self.width)
+            ),
+            options.update(height=None),
+        )
+        lines = list(Segment.split_lines(rendered))
+        width, height = Segment.get_shape(lines)
+        lines = Segment.set_shape(lines, width, height)
+        new_line = Segment.line()
+        excess_space = options.max_width - width
+        style = console.get_style(self.style) if self.style is not None else None
+
+        def generate_segments() -> Iterable[Segment]:
+            if excess_space <= 0:
+                # Exact fit
+                for line in lines:
+                    yield from line
+                    yield new_line
+
+            elif align == "left":
+                # Pad on the right
+                pad = Segment(" " * excess_space, style) if self.pad else None
+                for line in lines:
+                    yield from line
+                    if pad:
+                        yield pad
+                    yield new_line
+
+            elif align == "center":
+                # Pad left and right
+                left = excess_space // 2
+                pad = Segment(" " * left, style)
+                pad_right = (
+                    Segment(" " * (excess_space - left), style) if self.pad else None
+                )
+                for line in lines:
+                    if left:
+                        yield pad
+                    yield from line
+                    if pad_right:
+                        yield pad_right
+                    yield new_line
+
+            elif align == "right":
+                # Padding on left
+                pad = Segment(" " * excess_space, style)
+                for line in lines:
+                    yield pad
+                    yield from line
+                    yield new_line
+
+        blank_line = (
+            Segment(f"{' ' * (self.width or options.max_width)}\n", style)
+            if self.pad
+            else Segment("\n")
+        )
+
+        def blank_lines(count: int) -> Iterable[Segment]:
+            if count > 0:
+                for _ in range(count):
+                    yield blank_line
+
+        vertical_height = self.height or options.height
+        iter_segments: Iterable[Segment]
+        if self.vertical and vertical_height is not None:
+            if self.vertical == "top":
+                bottom_space = vertical_height - height
+                iter_segments = chain(generate_segments(), blank_lines(bottom_space))
+            elif self.vertical == "middle":
+                top_space = (vertical_height - height) // 2
+                bottom_space = vertical_height - top_space - height
+                iter_segments = chain(
+                    blank_lines(top_space),
+                    generate_segments(),
+                    blank_lines(bottom_space),
+                )
+            else:  #  self.vertical == "bottom":
+                top_space = vertical_height - height
+                iter_segments = chain(blank_lines(top_space), generate_segments())
+        else:
+            iter_segments = generate_segments()
+        if self.style:
+            style = console.get_style(self.style)
+            iter_segments = Segment.apply_style(iter_segments, style)
+        yield from iter_segments
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        measurement = Measurement.get(console, options, self.renderable)
+        return measurement
+
+
+class VerticalCenter(JupyterMixin):
+    """Vertically aligns a renderable.
+
+    Warn:
+        This class is deprecated and may be removed in a future version. Use Align class with
+        `vertical="middle"`.
+
+    Args:
+        renderable (RenderableType): A renderable object.
+    """
+
+    def __init__(
+        self,
+        renderable: "RenderableType",
+        style: Optional[StyleType] = None,
+    ) -> None:
+        self.renderable = renderable
+        self.style = style
+
+    def __repr__(self) -> str:
+        return f"VerticalCenter({self.renderable!r})"
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        style = console.get_style(self.style) if self.style is not None else None
+        lines = console.render_lines(
+            self.renderable, options.update(height=None), pad=False
+        )
+        width, _height = Segment.get_shape(lines)
+        new_line = Segment.line()
+        height = options.height or options.size.height
+        top_space = (height - len(lines)) // 2
+        bottom_space = height - top_space - len(lines)
+        blank_line = Segment(f"{' ' * width}", style)
+
+        def blank_lines(count: int) -> Iterable[Segment]:
+            for _ in range(count):
+                yield blank_line
+                yield new_line
+
+        if top_space > 0:
+            yield from blank_lines(top_space)
+        for line in lines:
+            yield from line
+            yield new_line
+        if bottom_space > 0:
+            yield from blank_lines(bottom_space)
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        measurement = Measurement.get(console, options, self.renderable)
+        return measurement
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console, Group
+    from pip._vendor.rich.highlighter import ReprHighlighter
+    from pip._vendor.rich.panel import Panel
+
+    highlighter = ReprHighlighter()
+    console = Console()
+
+    panel = Panel(
+        Group(
+            Align.left(highlighter("align='left'")),
+            Align.center(highlighter("align='center'")),
+            Align.right(highlighter("align='right'")),
+        ),
+        width=60,
+        style="on dark_blue",
+        title="Algin",
+    )
+
+    console.print(
+        Align.center(panel, vertical="middle", style="on red", height=console.height)
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/ansi.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/ansi.py
new file mode 100644
index 0000000..d4c32ce
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/ansi.py
@@ -0,0 +1,237 @@
+import re
+import sys
+from contextlib import suppress
+from typing import Iterable, NamedTuple, Optional
+
+from .color import Color
+from .style import Style
+from .text import Text
+
+re_ansi = re.compile(
+    r"""
+(?:\x1b\](.*?)\x1b\\)|
+(?:\x1b([(@-Z\\-_]|\[[0-?]*[ -/]*[@-~]))
+""",
+    re.VERBOSE,
+)
+
+
+class _AnsiToken(NamedTuple):
+    """Result of ansi tokenized string."""
+
+    plain: str = ""
+    sgr: Optional[str] = ""
+    osc: Optional[str] = ""
+
+
+def _ansi_tokenize(ansi_text: str) -> Iterable[_AnsiToken]:
+    """Tokenize a string in to plain text and ANSI codes.
+
+    Args:
+        ansi_text (str): A String containing ANSI codes.
+
+    Yields:
+        AnsiToken: A named tuple of (plain, sgr, osc)
+    """
+
+    position = 0
+    sgr: Optional[str]
+    osc: Optional[str]
+    for match in re_ansi.finditer(ansi_text):
+        start, end = match.span(0)
+        osc, sgr = match.groups()
+        if start > position:
+            yield _AnsiToken(ansi_text[position:start])
+        if sgr:
+            if sgr.endswith("m"):
+                yield _AnsiToken("", sgr[1:-1], osc)
+        else:
+            yield _AnsiToken("", sgr, osc)
+        position = end
+    if position < len(ansi_text):
+        yield _AnsiToken(ansi_text[position:])
+
+
+SGR_STYLE_MAP = {
+    1: "bold",
+    2: "dim",
+    3: "italic",
+    4: "underline",
+    5: "blink",
+    6: "blink2",
+    7: "reverse",
+    8: "conceal",
+    9: "strike",
+    21: "underline2",
+    22: "not dim not bold",
+    23: "not italic",
+    24: "not underline",
+    25: "not blink",
+    26: "not blink2",
+    27: "not reverse",
+    28: "not conceal",
+    29: "not strike",
+    30: "color(0)",
+    31: "color(1)",
+    32: "color(2)",
+    33: "color(3)",
+    34: "color(4)",
+    35: "color(5)",
+    36: "color(6)",
+    37: "color(7)",
+    39: "default",
+    40: "on color(0)",
+    41: "on color(1)",
+    42: "on color(2)",
+    43: "on color(3)",
+    44: "on color(4)",
+    45: "on color(5)",
+    46: "on color(6)",
+    47: "on color(7)",
+    49: "on default",
+    51: "frame",
+    52: "encircle",
+    53: "overline",
+    54: "not frame not encircle",
+    55: "not overline",
+    90: "color(8)",
+    91: "color(9)",
+    92: "color(10)",
+    93: "color(11)",
+    94: "color(12)",
+    95: "color(13)",
+    96: "color(14)",
+    97: "color(15)",
+    100: "on color(8)",
+    101: "on color(9)",
+    102: "on color(10)",
+    103: "on color(11)",
+    104: "on color(12)",
+    105: "on color(13)",
+    106: "on color(14)",
+    107: "on color(15)",
+}
+
+
+class AnsiDecoder:
+    """Translate ANSI code in to styled Text."""
+
+    def __init__(self) -> None:
+        self.style = Style.null()
+
+    def decode(self, terminal_text: str) -> Iterable[Text]:
+        """Decode ANSI codes in an interable of lines.
+
+        Args:
+            lines (Iterable[str]): An iterable of lines of terminal output.
+
+        Yields:
+            Text: Marked up Text.
+        """
+        for line in terminal_text.splitlines():
+            yield self.decode_line(line)
+
+    def decode_line(self, line: str) -> Text:
+        """Decode a line containing ansi codes.
+
+        Args:
+            line (str): A line of terminal output.
+
+        Returns:
+            Text: A Text instance marked up according to ansi codes.
+        """
+        from_ansi = Color.from_ansi
+        from_rgb = Color.from_rgb
+        _Style = Style
+        text = Text()
+        append = text.append
+        line = line.rsplit("\r", 1)[-1]
+        for plain_text, sgr, osc in _ansi_tokenize(line):
+            if plain_text:
+                append(plain_text, self.style or None)
+            elif osc is not None:
+                if osc.startswith("8;"):
+                    _params, semicolon, link = osc[2:].partition(";")
+                    if semicolon:
+                        self.style = self.style.update_link(link or None)
+            elif sgr is not None:
+                # Translate in to semi-colon separated codes
+                # Ignore invalid codes, because we want to be lenient
+                codes = [
+                    min(255, int(_code) if _code else 0)
+                    for _code in sgr.split(";")
+                    if _code.isdigit() or _code == ""
+                ]
+                iter_codes = iter(codes)
+                for code in iter_codes:
+                    if code == 0:
+                        # reset
+                        self.style = _Style.null()
+                    elif code in SGR_STYLE_MAP:
+                        # styles
+                        self.style += _Style.parse(SGR_STYLE_MAP[code])
+                    elif code == 38:
+                        #  Foreground
+                        with suppress(StopIteration):
+                            color_type = next(iter_codes)
+                            if color_type == 5:
+                                self.style += _Style.from_color(
+                                    from_ansi(next(iter_codes))
+                                )
+                            elif color_type == 2:
+                                self.style += _Style.from_color(
+                                    from_rgb(
+                                        next(iter_codes),
+                                        next(iter_codes),
+                                        next(iter_codes),
+                                    )
+                                )
+                    elif code == 48:
+                        # Background
+                        with suppress(StopIteration):
+                            color_type = next(iter_codes)
+                            if color_type == 5:
+                                self.style += _Style.from_color(
+                                    None, from_ansi(next(iter_codes))
+                                )
+                            elif color_type == 2:
+                                self.style += _Style.from_color(
+                                    None,
+                                    from_rgb(
+                                        next(iter_codes),
+                                        next(iter_codes),
+                                        next(iter_codes),
+                                    ),
+                                )
+
+        return text
+
+
+if sys.platform != "win32" and __name__ == "__main__":  # pragma: no cover
+    import io
+    import os
+    import pty
+    import sys
+
+    decoder = AnsiDecoder()
+
+    stdout = io.BytesIO()
+
+    def read(fd: int) -> bytes:
+        data = os.read(fd, 1024)
+        stdout.write(data)
+        return data
+
+    pty.spawn(sys.argv[1:], read)
+
+    from .console import Console
+
+    console = Console(record=True)
+
+    stdout_result = stdout.getvalue().decode("utf-8")
+    print(stdout_result)
+
+    for line in decoder.decode(stdout_result):
+        console.print(line)
+
+    console.save_html("stdout.html")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/bar.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/bar.py
new file mode 100644
index 0000000..ed86a55
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/bar.py
@@ -0,0 +1,94 @@
+from typing import Optional, Union
+
+from .color import Color
+from .console import Console, ConsoleOptions, RenderResult
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment
+from .style import Style
+
+# There are left-aligned characters for 1/8 to 7/8, but
+# the right-aligned characters exist only for 1/8 and 4/8.
+BEGIN_BLOCK_ELEMENTS = ["█", "█", "█", "▐", "▐", "▐", "▕", "▕"]
+END_BLOCK_ELEMENTS = [" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"]
+FULL_BLOCK = "█"
+
+
+class Bar(JupyterMixin):
+    """Renders a solid block bar.
+
+    Args:
+        size (float): Value for the end of the bar.
+        begin (float): Begin point (between 0 and size, inclusive).
+        end (float): End point (between 0 and size, inclusive).
+        width (int, optional): Width of the bar, or ``None`` for maximum width. Defaults to None.
+        color (Union[Color, str], optional): Color of the bar. Defaults to "default".
+        bgcolor (Union[Color, str], optional): Color of bar background. Defaults to "default".
+    """
+
+    def __init__(
+        self,
+        size: float,
+        begin: float,
+        end: float,
+        *,
+        width: Optional[int] = None,
+        color: Union[Color, str] = "default",
+        bgcolor: Union[Color, str] = "default",
+    ):
+        self.size = size
+        self.begin = max(begin, 0)
+        self.end = min(end, size)
+        self.width = width
+        self.style = Style(color=color, bgcolor=bgcolor)
+
+    def __repr__(self) -> str:
+        return f"Bar({self.size}, {self.begin}, {self.end})"
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+
+        width = min(
+            self.width if self.width is not None else options.max_width,
+            options.max_width,
+        )
+
+        if self.begin >= self.end:
+            yield Segment(" " * width, self.style)
+            yield Segment.line()
+            return
+
+        prefix_complete_eights = int(width * 8 * self.begin / self.size)
+        prefix_bar_count = prefix_complete_eights // 8
+        prefix_eights_count = prefix_complete_eights % 8
+
+        body_complete_eights = int(width * 8 * self.end / self.size)
+        body_bar_count = body_complete_eights // 8
+        body_eights_count = body_complete_eights % 8
+
+        # When start and end fall into the same cell, we ideally should render
+        # a symbol that's "center-aligned", but there is no good symbol in Unicode.
+        # In this case, we fall back to right-aligned block symbol for simplicity.
+
+        prefix = " " * prefix_bar_count
+        if prefix_eights_count:
+            prefix += BEGIN_BLOCK_ELEMENTS[prefix_eights_count]
+
+        body = FULL_BLOCK * body_bar_count
+        if body_eights_count:
+            body += END_BLOCK_ELEMENTS[body_eights_count]
+
+        suffix = " " * (width - len(body))
+
+        yield Segment(prefix + body[len(prefix) :] + suffix, self.style)
+        yield Segment.line()
+
+    def __rich_measure__(
+        self, console: Console, options: ConsoleOptions
+    ) -> Measurement:
+        return (
+            Measurement(self.width, self.width)
+            if self.width is not None
+            else Measurement(4, options.max_width)
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/box.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/box.py
new file mode 100644
index 0000000..d0b07cf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/box.py
@@ -0,0 +1,517 @@
+import sys
+from typing import TYPE_CHECKING, Iterable, List
+
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+
+from ._loop import loop_last
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.console import ConsoleOptions
+
+
+class Box:
+    """Defines characters to render boxes.
+
+    ┌─┬┐ top
+    │ ││ head
+    ├─┼┤ head_row
+    │ ││ mid
+    ├─┼┤ row
+    ├─┼┤ foot_row
+    │ ││ foot
+    └─┴┘ bottom
+
+    Args:
+        box (str): Characters making up box.
+        ascii (bool, optional): True if this box uses ascii characters only. Default is False.
+    """
+
+    def __init__(self, box: str, *, ascii: bool = False) -> None:
+        self._box = box
+        self.ascii = ascii
+        line1, line2, line3, line4, line5, line6, line7, line8 = box.splitlines()
+        # top
+        self.top_left, self.top, self.top_divider, self.top_right = iter(line1)
+        # head
+        self.head_left, _, self.head_vertical, self.head_right = iter(line2)
+        # head_row
+        (
+            self.head_row_left,
+            self.head_row_horizontal,
+            self.head_row_cross,
+            self.head_row_right,
+        ) = iter(line3)
+
+        # mid
+        self.mid_left, _, self.mid_vertical, self.mid_right = iter(line4)
+        # row
+        self.row_left, self.row_horizontal, self.row_cross, self.row_right = iter(line5)
+        # foot_row
+        (
+            self.foot_row_left,
+            self.foot_row_horizontal,
+            self.foot_row_cross,
+            self.foot_row_right,
+        ) = iter(line6)
+        # foot
+        self.foot_left, _, self.foot_vertical, self.foot_right = iter(line7)
+        # bottom
+        self.bottom_left, self.bottom, self.bottom_divider, self.bottom_right = iter(
+            line8
+        )
+
+    def __repr__(self) -> str:
+        return "Box(...)"
+
+    def __str__(self) -> str:
+        return self._box
+
+    def substitute(self, options: "ConsoleOptions", safe: bool = True) -> "Box":
+        """Substitute this box for another if it won't render due to platform issues.
+
+        Args:
+            options (ConsoleOptions): Console options used in rendering.
+            safe (bool, optional): Substitute this for another Box if there are known problems
+                displaying on the platform (currently only relevant on Windows). Default is True.
+
+        Returns:
+            Box: A different Box or the same Box.
+        """
+        box = self
+        if options.legacy_windows and safe:
+            box = LEGACY_WINDOWS_SUBSTITUTIONS.get(box, box)
+        if options.ascii_only and not box.ascii:
+            box = ASCII
+        return box
+
+    def get_plain_headed_box(self) -> "Box":
+        """If this box uses special characters for the borders of the header, then
+        return the equivalent box that does not.
+
+        Returns:
+            Box: The most similar Box that doesn't use header-specific box characters.
+                If the current Box already satisfies this criterion, then it's returned.
+        """
+        return PLAIN_HEADED_SUBSTITUTIONS.get(self, self)
+
+    def get_top(self, widths: Iterable[int]) -> str:
+        """Get the top of a simple box.
+
+        Args:
+            widths (List[int]): Widths of columns.
+
+        Returns:
+            str: A string of box characters.
+        """
+
+        parts: List[str] = []
+        append = parts.append
+        append(self.top_left)
+        for last, width in loop_last(widths):
+            append(self.top * width)
+            if not last:
+                append(self.top_divider)
+        append(self.top_right)
+        return "".join(parts)
+
+    def get_row(
+        self,
+        widths: Iterable[int],
+        level: Literal["head", "row", "foot", "mid"] = "row",
+        edge: bool = True,
+    ) -> str:
+        """Get the top of a simple box.
+
+        Args:
+            width (List[int]): Widths of columns.
+
+        Returns:
+            str: A string of box characters.
+        """
+        if level == "head":
+            left = self.head_row_left
+            horizontal = self.head_row_horizontal
+            cross = self.head_row_cross
+            right = self.head_row_right
+        elif level == "row":
+            left = self.row_left
+            horizontal = self.row_horizontal
+            cross = self.row_cross
+            right = self.row_right
+        elif level == "mid":
+            left = self.mid_left
+            horizontal = " "
+            cross = self.mid_vertical
+            right = self.mid_right
+        elif level == "foot":
+            left = self.foot_row_left
+            horizontal = self.foot_row_horizontal
+            cross = self.foot_row_cross
+            right = self.foot_row_right
+        else:
+            raise ValueError("level must be 'head', 'row' or 'foot'")
+
+        parts: List[str] = []
+        append = parts.append
+        if edge:
+            append(left)
+        for last, width in loop_last(widths):
+            append(horizontal * width)
+            if not last:
+                append(cross)
+        if edge:
+            append(right)
+        return "".join(parts)
+
+    def get_bottom(self, widths: Iterable[int]) -> str:
+        """Get the bottom of a simple box.
+
+        Args:
+            widths (List[int]): Widths of columns.
+
+        Returns:
+            str: A string of box characters.
+        """
+
+        parts: List[str] = []
+        append = parts.append
+        append(self.bottom_left)
+        for last, width in loop_last(widths):
+            append(self.bottom * width)
+            if not last:
+                append(self.bottom_divider)
+        append(self.bottom_right)
+        return "".join(parts)
+
+
+ASCII: Box = Box(
+    """\
++--+
+| ||
+|-+|
+| ||
+|-+|
+|-+|
+| ||
++--+
+""",
+    ascii=True,
+)
+
+ASCII2: Box = Box(
+    """\
++-++
+| ||
++-++
+| ||
++-++
++-++
+| ||
++-++
+""",
+    ascii=True,
+)
+
+ASCII_DOUBLE_HEAD: Box = Box(
+    """\
++-++
+| ||
++=++
+| ||
++-++
++-++
+| ||
++-++
+""",
+    ascii=True,
+)
+
+SQUARE: Box = Box(
+    """\
+┌─┬┐
+│ ││
+├─┼┤
+│ ││
+├─┼┤
+├─┼┤
+│ ││
+└─┴┘
+"""
+)
+
+SQUARE_DOUBLE_HEAD: Box = Box(
+    """\
+┌─┬┐
+│ ││
+╞═╪╡
+│ ││
+├─┼┤
+├─┼┤
+│ ││
+└─┴┘
+"""
+)
+
+MINIMAL: Box = Box(
+    """\
+  ╷ 
+  │ 
+╶─┼╴
+  │ 
+╶─┼╴
+╶─┼╴
+  │ 
+  ╵ 
+"""
+)
+
+
+MINIMAL_HEAVY_HEAD: Box = Box(
+    """\
+  ╷ 
+  │ 
+╺━┿╸
+  │ 
+╶─┼╴
+╶─┼╴
+  │ 
+  ╵ 
+"""
+)
+
+MINIMAL_DOUBLE_HEAD: Box = Box(
+    """\
+  ╷ 
+  │ 
+ ═╪ 
+  │ 
+ ─┼ 
+ ─┼ 
+  │ 
+  ╵ 
+"""
+)
+
+
+SIMPLE: Box = Box(
+    """\
+    
+    
+ ── 
+    
+    
+ ── 
+    
+    
+"""
+)
+
+SIMPLE_HEAD: Box = Box(
+    """\
+    
+    
+ ── 
+    
+    
+    
+    
+    
+"""
+)
+
+
+SIMPLE_HEAVY: Box = Box(
+    """\
+    
+    
+ ━━ 
+    
+    
+ ━━ 
+    
+    
+"""
+)
+
+
+HORIZONTALS: Box = Box(
+    """\
+ ── 
+    
+ ── 
+    
+ ── 
+ ── 
+    
+ ── 
+"""
+)
+
+ROUNDED: Box = Box(
+    """\
+╭─┬╮
+│ ││
+├─┼┤
+│ ││
+├─┼┤
+├─┼┤
+│ ││
+╰─┴╯
+"""
+)
+
+HEAVY: Box = Box(
+    """\
+┏━┳┓
+┃ ┃┃
+┣━╋┫
+┃ ┃┃
+┣━╋┫
+┣━╋┫
+┃ ┃┃
+┗━┻┛
+"""
+)
+
+HEAVY_EDGE: Box = Box(
+    """\
+┏━┯┓
+┃ │┃
+┠─┼┨
+┃ │┃
+┠─┼┨
+┠─┼┨
+┃ │┃
+┗━┷┛
+"""
+)
+
+HEAVY_HEAD: Box = Box(
+    """\
+┏━┳┓
+┃ ┃┃
+┡━╇┩
+│ ││
+├─┼┤
+├─┼┤
+│ ││
+└─┴┘
+"""
+)
+
+DOUBLE: Box = Box(
+    """\
+╔═╦╗
+║ ║║
+╠═╬╣
+║ ║║
+╠═╬╣
+╠═╬╣
+║ ║║
+╚═╩╝
+"""
+)
+
+DOUBLE_EDGE: Box = Box(
+    """\
+╔═╤╗
+║ │║
+╟─┼╢
+║ │║
+╟─┼╢
+╟─┼╢
+║ │║
+╚═╧╝
+"""
+)
+
+MARKDOWN: Box = Box(
+    """\
+    
+| ||
+|-||
+| ||
+|-||
+|-||
+| ||
+    
+""",
+    ascii=True,
+)
+
+# Map Boxes that don't render with raster fonts on to equivalent that do
+LEGACY_WINDOWS_SUBSTITUTIONS = {
+    ROUNDED: SQUARE,
+    MINIMAL_HEAVY_HEAD: MINIMAL,
+    SIMPLE_HEAVY: SIMPLE,
+    HEAVY: SQUARE,
+    HEAVY_EDGE: SQUARE,
+    HEAVY_HEAD: SQUARE,
+}
+
+# Map headed boxes to their headerless equivalents
+PLAIN_HEADED_SUBSTITUTIONS = {
+    HEAVY_HEAD: SQUARE,
+    SQUARE_DOUBLE_HEAD: SQUARE,
+    MINIMAL_DOUBLE_HEAD: MINIMAL,
+    MINIMAL_HEAVY_HEAD: MINIMAL,
+    ASCII_DOUBLE_HEAD: ASCII2,
+}
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from pip._vendor.rich.columns import Columns
+    from pip._vendor.rich.panel import Panel
+
+    from . import box as box
+    from .console import Console
+    from .table import Table
+    from .text import Text
+
+    console = Console(record=True)
+
+    BOXES = [
+        "ASCII",
+        "ASCII2",
+        "ASCII_DOUBLE_HEAD",
+        "SQUARE",
+        "SQUARE_DOUBLE_HEAD",
+        "MINIMAL",
+        "MINIMAL_HEAVY_HEAD",
+        "MINIMAL_DOUBLE_HEAD",
+        "SIMPLE",
+        "SIMPLE_HEAD",
+        "SIMPLE_HEAVY",
+        "HORIZONTALS",
+        "ROUNDED",
+        "HEAVY",
+        "HEAVY_EDGE",
+        "HEAVY_HEAD",
+        "DOUBLE",
+        "DOUBLE_EDGE",
+        "MARKDOWN",
+    ]
+
+    console.print(Panel("[bold green]Box Constants", style="green"), justify="center")
+    console.print()
+
+    columns = Columns(expand=True, padding=2)
+    for box_name in sorted(BOXES):
+        table = Table(
+            show_footer=True, style="dim", border_style="not dim", expand=True
+        )
+        table.add_column("Header 1", "Footer 1")
+        table.add_column("Header 2", "Footer 2")
+        table.add_row("Cell", "Cell")
+        table.add_row("Cell", "Cell")
+        table.box = getattr(box, box_name)
+        table.title = Text(f"box.{box_name}", style="magenta")
+        columns.add_renderable(table)
+    console.print(columns)
+
+    # console.save_html("box.html", inline_styles=True)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/cells.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/cells.py
new file mode 100644
index 0000000..139b949
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/cells.py
@@ -0,0 +1,154 @@
+import re
+from functools import lru_cache
+from typing import Callable, List
+
+from ._cell_widths import CELL_WIDTHS
+
+# Regex to match sequence of the most common character ranges
+_is_single_cell_widths = re.compile("^[\u0020-\u006f\u00a0\u02ff\u0370-\u0482]*$").match
+
+
+@lru_cache(4096)
+def cached_cell_len(text: str) -> int:
+    """Get the number of cells required to display text.
+
+    This method always caches, which may use up a lot of memory. It is recommended to use
+    `cell_len` over this method.
+
+    Args:
+        text (str): Text to display.
+
+    Returns:
+        int: Get the number of cells required to display text.
+    """
+    _get_size = get_character_cell_size
+    total_size = sum(_get_size(character) for character in text)
+    return total_size
+
+
+def cell_len(text: str, _cell_len: Callable[[str], int] = cached_cell_len) -> int:
+    """Get the number of cells required to display text.
+
+    Args:
+        text (str): Text to display.
+
+    Returns:
+        int: Get the number of cells required to display text.
+    """
+    if len(text) < 512:
+        return _cell_len(text)
+    _get_size = get_character_cell_size
+    total_size = sum(_get_size(character) for character in text)
+    return total_size
+
+
+@lru_cache(maxsize=4096)
+def get_character_cell_size(character: str) -> int:
+    """Get the cell size of a character.
+
+    Args:
+        character (str): A single character.
+
+    Returns:
+        int: Number of cells (0, 1 or 2) occupied by that character.
+    """
+    return _get_codepoint_cell_size(ord(character))
+
+
+@lru_cache(maxsize=4096)
+def _get_codepoint_cell_size(codepoint: int) -> int:
+    """Get the cell size of a character.
+
+    Args:
+        character (str): A single character.
+
+    Returns:
+        int: Number of cells (0, 1 or 2) occupied by that character.
+    """
+
+    _table = CELL_WIDTHS
+    lower_bound = 0
+    upper_bound = len(_table) - 1
+    index = (lower_bound + upper_bound) // 2
+    while True:
+        start, end, width = _table[index]
+        if codepoint < start:
+            upper_bound = index - 1
+        elif codepoint > end:
+            lower_bound = index + 1
+        else:
+            return 0 if width == -1 else width
+        if upper_bound < lower_bound:
+            break
+        index = (lower_bound + upper_bound) // 2
+    return 1
+
+
+def set_cell_size(text: str, total: int) -> str:
+    """Set the length of a string to fit within given number of cells."""
+
+    if _is_single_cell_widths(text):
+        size = len(text)
+        if size < total:
+            return text + " " * (total - size)
+        return text[:total]
+
+    if total <= 0:
+        return ""
+    cell_size = cell_len(text)
+    if cell_size == total:
+        return text
+    if cell_size < total:
+        return text + " " * (total - cell_size)
+
+    start = 0
+    end = len(text)
+
+    # Binary search until we find the right size
+    while True:
+        pos = (start + end) // 2
+        before = text[: pos + 1]
+        before_len = cell_len(before)
+        if before_len == total + 1 and cell_len(before[-1]) == 2:
+            return before[:-1] + " "
+        if before_len == total:
+            return before
+        if before_len > total:
+            end = pos
+        else:
+            start = pos
+
+
+# TODO: This is inefficient
+# TODO: This might not work with CWJ type characters
+def chop_cells(text: str, max_size: int, position: int = 0) -> List[str]:
+    """Break text in to equal (cell) length strings, returning the characters in reverse
+    order"""
+    _get_character_cell_size = get_character_cell_size
+    characters = [
+        (character, _get_character_cell_size(character)) for character in text
+    ]
+    total_size = position
+    lines: List[List[str]] = [[]]
+    append = lines[-1].append
+
+    for character, size in reversed(characters):
+        if total_size + size > max_size:
+            lines.append([character])
+            append = lines[-1].append
+            total_size = size
+        else:
+            total_size += size
+            append(character)
+
+    return ["".join(line) for line in lines]
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    print(get_character_cell_size("😽"))
+    for line in chop_cells("""这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑。""", 8):
+        print(line)
+    for n in range(80, 1, -1):
+        print(set_cell_size("""这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑。""", n) + "|")
+        print("x" * n)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/color.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/color.py
new file mode 100644
index 0000000..6bca2da
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/color.py
@@ -0,0 +1,615 @@
+import platform
+import re
+from colorsys import rgb_to_hls
+from enum import IntEnum
+from functools import lru_cache
+from typing import TYPE_CHECKING, NamedTuple, Optional, Tuple
+
+from ._palettes import EIGHT_BIT_PALETTE, STANDARD_PALETTE, WINDOWS_PALETTE
+from .color_triplet import ColorTriplet
+from .repr import Result, rich_repr
+from .terminal_theme import DEFAULT_TERMINAL_THEME
+
+if TYPE_CHECKING:  # pragma: no cover
+    from .terminal_theme import TerminalTheme
+    from .text import Text
+
+
+WINDOWS = platform.system() == "Windows"
+
+
+class ColorSystem(IntEnum):
+    """One of the 3 color system supported by terminals."""
+
+    STANDARD = 1
+    EIGHT_BIT = 2
+    TRUECOLOR = 3
+    WINDOWS = 4
+
+    def __repr__(self) -> str:
+        return f"ColorSystem.{self.name}"
+
+
+class ColorType(IntEnum):
+    """Type of color stored in Color class."""
+
+    DEFAULT = 0
+    STANDARD = 1
+    EIGHT_BIT = 2
+    TRUECOLOR = 3
+    WINDOWS = 4
+
+    def __repr__(self) -> str:
+        return f"ColorType.{self.name}"
+
+
+ANSI_COLOR_NAMES = {
+    "black": 0,
+    "red": 1,
+    "green": 2,
+    "yellow": 3,
+    "blue": 4,
+    "magenta": 5,
+    "cyan": 6,
+    "white": 7,
+    "bright_black": 8,
+    "bright_red": 9,
+    "bright_green": 10,
+    "bright_yellow": 11,
+    "bright_blue": 12,
+    "bright_magenta": 13,
+    "bright_cyan": 14,
+    "bright_white": 15,
+    "grey0": 16,
+    "gray0": 16,
+    "navy_blue": 17,
+    "dark_blue": 18,
+    "blue3": 20,
+    "blue1": 21,
+    "dark_green": 22,
+    "deep_sky_blue4": 25,
+    "dodger_blue3": 26,
+    "dodger_blue2": 27,
+    "green4": 28,
+    "spring_green4": 29,
+    "turquoise4": 30,
+    "deep_sky_blue3": 32,
+    "dodger_blue1": 33,
+    "green3": 40,
+    "spring_green3": 41,
+    "dark_cyan": 36,
+    "light_sea_green": 37,
+    "deep_sky_blue2": 38,
+    "deep_sky_blue1": 39,
+    "spring_green2": 47,
+    "cyan3": 43,
+    "dark_turquoise": 44,
+    "turquoise2": 45,
+    "green1": 46,
+    "spring_green1": 48,
+    "medium_spring_green": 49,
+    "cyan2": 50,
+    "cyan1": 51,
+    "dark_red": 88,
+    "deep_pink4": 125,
+    "purple4": 55,
+    "purple3": 56,
+    "blue_violet": 57,
+    "orange4": 94,
+    "grey37": 59,
+    "gray37": 59,
+    "medium_purple4": 60,
+    "slate_blue3": 62,
+    "royal_blue1": 63,
+    "chartreuse4": 64,
+    "dark_sea_green4": 71,
+    "pale_turquoise4": 66,
+    "steel_blue": 67,
+    "steel_blue3": 68,
+    "cornflower_blue": 69,
+    "chartreuse3": 76,
+    "cadet_blue": 73,
+    "sky_blue3": 74,
+    "steel_blue1": 81,
+    "pale_green3": 114,
+    "sea_green3": 78,
+    "aquamarine3": 79,
+    "medium_turquoise": 80,
+    "chartreuse2": 112,
+    "sea_green2": 83,
+    "sea_green1": 85,
+    "aquamarine1": 122,
+    "dark_slate_gray2": 87,
+    "dark_magenta": 91,
+    "dark_violet": 128,
+    "purple": 129,
+    "light_pink4": 95,
+    "plum4": 96,
+    "medium_purple3": 98,
+    "slate_blue1": 99,
+    "yellow4": 106,
+    "wheat4": 101,
+    "grey53": 102,
+    "gray53": 102,
+    "light_slate_grey": 103,
+    "light_slate_gray": 103,
+    "medium_purple": 104,
+    "light_slate_blue": 105,
+    "dark_olive_green3": 149,
+    "dark_sea_green": 108,
+    "light_sky_blue3": 110,
+    "sky_blue2": 111,
+    "dark_sea_green3": 150,
+    "dark_slate_gray3": 116,
+    "sky_blue1": 117,
+    "chartreuse1": 118,
+    "light_green": 120,
+    "pale_green1": 156,
+    "dark_slate_gray1": 123,
+    "red3": 160,
+    "medium_violet_red": 126,
+    "magenta3": 164,
+    "dark_orange3": 166,
+    "indian_red": 167,
+    "hot_pink3": 168,
+    "medium_orchid3": 133,
+    "medium_orchid": 134,
+    "medium_purple2": 140,
+    "dark_goldenrod": 136,
+    "light_salmon3": 173,
+    "rosy_brown": 138,
+    "grey63": 139,
+    "gray63": 139,
+    "medium_purple1": 141,
+    "gold3": 178,
+    "dark_khaki": 143,
+    "navajo_white3": 144,
+    "grey69": 145,
+    "gray69": 145,
+    "light_steel_blue3": 146,
+    "light_steel_blue": 147,
+    "yellow3": 184,
+    "dark_sea_green2": 157,
+    "light_cyan3": 152,
+    "light_sky_blue1": 153,
+    "green_yellow": 154,
+    "dark_olive_green2": 155,
+    "dark_sea_green1": 193,
+    "pale_turquoise1": 159,
+    "deep_pink3": 162,
+    "magenta2": 200,
+    "hot_pink2": 169,
+    "orchid": 170,
+    "medium_orchid1": 207,
+    "orange3": 172,
+    "light_pink3": 174,
+    "pink3": 175,
+    "plum3": 176,
+    "violet": 177,
+    "light_goldenrod3": 179,
+    "tan": 180,
+    "misty_rose3": 181,
+    "thistle3": 182,
+    "plum2": 183,
+    "khaki3": 185,
+    "light_goldenrod2": 222,
+    "light_yellow3": 187,
+    "grey84": 188,
+    "gray84": 188,
+    "light_steel_blue1": 189,
+    "yellow2": 190,
+    "dark_olive_green1": 192,
+    "honeydew2": 194,
+    "light_cyan1": 195,
+    "red1": 196,
+    "deep_pink2": 197,
+    "deep_pink1": 199,
+    "magenta1": 201,
+    "orange_red1": 202,
+    "indian_red1": 204,
+    "hot_pink": 206,
+    "dark_orange": 208,
+    "salmon1": 209,
+    "light_coral": 210,
+    "pale_violet_red1": 211,
+    "orchid2": 212,
+    "orchid1": 213,
+    "orange1": 214,
+    "sandy_brown": 215,
+    "light_salmon1": 216,
+    "light_pink1": 217,
+    "pink1": 218,
+    "plum1": 219,
+    "gold1": 220,
+    "navajo_white1": 223,
+    "misty_rose1": 224,
+    "thistle1": 225,
+    "yellow1": 226,
+    "light_goldenrod1": 227,
+    "khaki1": 228,
+    "wheat1": 229,
+    "cornsilk1": 230,
+    "grey100": 231,
+    "gray100": 231,
+    "grey3": 232,
+    "gray3": 232,
+    "grey7": 233,
+    "gray7": 233,
+    "grey11": 234,
+    "gray11": 234,
+    "grey15": 235,
+    "gray15": 235,
+    "grey19": 236,
+    "gray19": 236,
+    "grey23": 237,
+    "gray23": 237,
+    "grey27": 238,
+    "gray27": 238,
+    "grey30": 239,
+    "gray30": 239,
+    "grey35": 240,
+    "gray35": 240,
+    "grey39": 241,
+    "gray39": 241,
+    "grey42": 242,
+    "gray42": 242,
+    "grey46": 243,
+    "gray46": 243,
+    "grey50": 244,
+    "gray50": 244,
+    "grey54": 245,
+    "gray54": 245,
+    "grey58": 246,
+    "gray58": 246,
+    "grey62": 247,
+    "gray62": 247,
+    "grey66": 248,
+    "gray66": 248,
+    "grey70": 249,
+    "gray70": 249,
+    "grey74": 250,
+    "gray74": 250,
+    "grey78": 251,
+    "gray78": 251,
+    "grey82": 252,
+    "gray82": 252,
+    "grey85": 253,
+    "gray85": 253,
+    "grey89": 254,
+    "gray89": 254,
+    "grey93": 255,
+    "gray93": 255,
+}
+
+
+class ColorParseError(Exception):
+    """The color could not be parsed."""
+
+
+RE_COLOR = re.compile(
+    r"""^
+\#([0-9a-f]{6})$|
+color\(([0-9]{1,3})\)$|
+rgb\(([\d\s,]+)\)$
+""",
+    re.VERBOSE,
+)
+
+
+@rich_repr
+class Color(NamedTuple):
+    """Terminal color definition."""
+
+    name: str
+    """The name of the color (typically the input to Color.parse)."""
+    type: ColorType
+    """The type of the color."""
+    number: Optional[int] = None
+    """The color number, if a standard color, or None."""
+    triplet: Optional[ColorTriplet] = None
+    """A triplet of color components, if an RGB color."""
+
+    def __rich__(self) -> "Text":
+        """Dispays the actual color if Rich printed."""
+        from .style import Style
+        from .text import Text
+
+        return Text.assemble(
+            f"<color {self.name!r} ({self.type.name.lower()})",
+            ("⬤", Style(color=self)),
+            " >",
+        )
+
+    def __rich_repr__(self) -> Result:
+        yield self.name
+        yield self.type
+        yield "number", self.number, None
+        yield "triplet", self.triplet, None
+
+    @property
+    def system(self) -> ColorSystem:
+        """Get the native color system for this color."""
+        if self.type == ColorType.DEFAULT:
+            return ColorSystem.STANDARD
+        return ColorSystem(int(self.type))
+
+    @property
+    def is_system_defined(self) -> bool:
+        """Check if the color is ultimately defined by the system."""
+        return self.system not in (ColorSystem.EIGHT_BIT, ColorSystem.TRUECOLOR)
+
+    @property
+    def is_default(self) -> bool:
+        """Check if the color is a default color."""
+        return self.type == ColorType.DEFAULT
+
+    def get_truecolor(
+        self, theme: Optional["TerminalTheme"] = None, foreground: bool = True
+    ) -> ColorTriplet:
+        """Get an equivalent color triplet for this color.
+
+        Args:
+            theme (TerminalTheme, optional): Optional terminal theme, or None to use default. Defaults to None.
+            foreground (bool, optional): True for a foreground color, or False for background. Defaults to True.
+
+        Returns:
+            ColorTriplet: A color triplet containing RGB components.
+        """
+
+        if theme is None:
+            theme = DEFAULT_TERMINAL_THEME
+        if self.type == ColorType.TRUECOLOR:
+            assert self.triplet is not None
+            return self.triplet
+        elif self.type == ColorType.EIGHT_BIT:
+            assert self.number is not None
+            return EIGHT_BIT_PALETTE[self.number]
+        elif self.type == ColorType.STANDARD:
+            assert self.number is not None
+            return theme.ansi_colors[self.number]
+        elif self.type == ColorType.WINDOWS:
+            assert self.number is not None
+            return WINDOWS_PALETTE[self.number]
+        else:  # self.type == ColorType.DEFAULT:
+            assert self.number is None
+            return theme.foreground_color if foreground else theme.background_color
+
+    @classmethod
+    def from_ansi(cls, number: int) -> "Color":
+        """Create a Color number from it's 8-bit ansi number.
+
+        Args:
+            number (int): A number between 0-255 inclusive.
+
+        Returns:
+            Color: A new Color instance.
+        """
+        return cls(
+            name=f"color({number})",
+            type=(ColorType.STANDARD if number < 16 else ColorType.EIGHT_BIT),
+            number=number,
+        )
+
+    @classmethod
+    def from_triplet(cls, triplet: "ColorTriplet") -> "Color":
+        """Create a truecolor RGB color from a triplet of values.
+
+        Args:
+            triplet (ColorTriplet): A color triplet containing red, green and blue components.
+
+        Returns:
+            Color: A new color object.
+        """
+        return cls(name=triplet.hex, type=ColorType.TRUECOLOR, triplet=triplet)
+
+    @classmethod
+    def from_rgb(cls, red: float, green: float, blue: float) -> "Color":
+        """Create a truecolor from three color components in the range(0->255).
+
+        Args:
+            red (float): Red component in range 0-255.
+            green (float): Green component in range 0-255.
+            blue (float): Blue component in range 0-255.
+
+        Returns:
+            Color: A new color object.
+        """
+        return cls.from_triplet(ColorTriplet(int(red), int(green), int(blue)))
+
+    @classmethod
+    def default(cls) -> "Color":
+        """Get a Color instance representing the default color.
+
+        Returns:
+            Color: Default color.
+        """
+        return cls(name="default", type=ColorType.DEFAULT)
+
+    @classmethod
+    @lru_cache(maxsize=1024)
+    def parse(cls, color: str) -> "Color":
+        """Parse a color definition."""
+        original_color = color
+        color = color.lower().strip()
+
+        if color == "default":
+            return cls(color, type=ColorType.DEFAULT)
+
+        color_number = ANSI_COLOR_NAMES.get(color)
+        if color_number is not None:
+            return cls(
+                color,
+                type=(ColorType.STANDARD if color_number < 16 else ColorType.EIGHT_BIT),
+                number=color_number,
+            )
+
+        color_match = RE_COLOR.match(color)
+        if color_match is None:
+            raise ColorParseError(f"{original_color!r} is not a valid color")
+
+        color_24, color_8, color_rgb = color_match.groups()
+        if color_24:
+            triplet = ColorTriplet(
+                int(color_24[0:2], 16), int(color_24[2:4], 16), int(color_24[4:6], 16)
+            )
+            return cls(color, ColorType.TRUECOLOR, triplet=triplet)
+
+        elif color_8:
+            number = int(color_8)
+            if number > 255:
+                raise ColorParseError(f"color number must be <= 255 in {color!r}")
+            return cls(
+                color,
+                type=(ColorType.STANDARD if number < 16 else ColorType.EIGHT_BIT),
+                number=number,
+            )
+
+        else:  #  color_rgb:
+            components = color_rgb.split(",")
+            if len(components) != 3:
+                raise ColorParseError(
+                    f"expected three components in {original_color!r}"
+                )
+            red, green, blue = components
+            triplet = ColorTriplet(int(red), int(green), int(blue))
+            if not all(component <= 255 for component in triplet):
+                raise ColorParseError(
+                    f"color components must be <= 255 in {original_color!r}"
+                )
+            return cls(color, ColorType.TRUECOLOR, triplet=triplet)
+
+    @lru_cache(maxsize=1024)
+    def get_ansi_codes(self, foreground: bool = True) -> Tuple[str, ...]:
+        """Get the ANSI escape codes for this color."""
+        _type = self.type
+        if _type == ColorType.DEFAULT:
+            return ("39" if foreground else "49",)
+
+        elif _type == ColorType.WINDOWS:
+            number = self.number
+            assert number is not None
+            fore, back = (30, 40) if number < 8 else (82, 92)
+            return (str(fore + number if foreground else back + number),)
+
+        elif _type == ColorType.STANDARD:
+            number = self.number
+            assert number is not None
+            fore, back = (30, 40) if number < 8 else (82, 92)
+            return (str(fore + number if foreground else back + number),)
+
+        elif _type == ColorType.EIGHT_BIT:
+            assert self.number is not None
+            return ("38" if foreground else "48", "5", str(self.number))
+
+        else:  # self.standard == ColorStandard.TRUECOLOR:
+            assert self.triplet is not None
+            red, green, blue = self.triplet
+            return ("38" if foreground else "48", "2", str(red), str(green), str(blue))
+
+    @lru_cache(maxsize=1024)
+    def downgrade(self, system: ColorSystem) -> "Color":
+        """Downgrade a color system to a system with fewer colors."""
+
+        if self.type in [ColorType.DEFAULT, system]:
+            return self
+        # Convert to 8-bit color from truecolor color
+        if system == ColorSystem.EIGHT_BIT and self.system == ColorSystem.TRUECOLOR:
+            assert self.triplet is not None
+            red, green, blue = self.triplet.normalized
+            _h, l, s = rgb_to_hls(red, green, blue)
+            # If saturation is under 10% assume it is grayscale
+            if s < 0.1:
+                gray = round(l * 25.0)
+                if gray == 0:
+                    color_number = 16
+                elif gray == 25:
+                    color_number = 231
+                else:
+                    color_number = 231 + gray
+                return Color(self.name, ColorType.EIGHT_BIT, number=color_number)
+
+            color_number = (
+                16 + 36 * round(red * 5.0) + 6 * round(green * 5.0) + round(blue * 5.0)
+            )
+            return Color(self.name, ColorType.EIGHT_BIT, number=color_number)
+
+        # Convert to standard from truecolor or 8-bit
+        elif system == ColorSystem.STANDARD:
+            if self.system == ColorSystem.TRUECOLOR:
+                assert self.triplet is not None
+                triplet = self.triplet
+            else:  # self.system == ColorSystem.EIGHT_BIT
+                assert self.number is not None
+                triplet = ColorTriplet(*EIGHT_BIT_PALETTE[self.number])
+
+            color_number = STANDARD_PALETTE.match(triplet)
+            return Color(self.name, ColorType.STANDARD, number=color_number)
+
+        elif system == ColorSystem.WINDOWS:
+            if self.system == ColorSystem.TRUECOLOR:
+                assert self.triplet is not None
+                triplet = self.triplet
+            else:  # self.system == ColorSystem.EIGHT_BIT
+                assert self.number is not None
+                if self.number < 16:
+                    return Color(self.name, ColorType.WINDOWS, number=self.number)
+                triplet = ColorTriplet(*EIGHT_BIT_PALETTE[self.number])
+
+            color_number = WINDOWS_PALETTE.match(triplet)
+            return Color(self.name, ColorType.WINDOWS, number=color_number)
+
+        return self
+
+
+def parse_rgb_hex(hex_color: str) -> ColorTriplet:
+    """Parse six hex characters in to RGB triplet."""
+    assert len(hex_color) == 6, "must be 6 characters"
+    color = ColorTriplet(
+        int(hex_color[0:2], 16), int(hex_color[2:4], 16), int(hex_color[4:6], 16)
+    )
+    return color
+
+
+def blend_rgb(
+    color1: ColorTriplet, color2: ColorTriplet, cross_fade: float = 0.5
+) -> ColorTriplet:
+    """Blend one RGB color in to another."""
+    r1, g1, b1 = color1
+    r2, g2, b2 = color2
+    new_color = ColorTriplet(
+        int(r1 + (r2 - r1) * cross_fade),
+        int(g1 + (g2 - g1) * cross_fade),
+        int(b1 + (b2 - b1) * cross_fade),
+    )
+    return new_color
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from .console import Console
+    from .table import Table
+    from .text import Text
+
+    console = Console()
+
+    table = Table(show_footer=False, show_edge=True)
+    table.add_column("Color", width=10, overflow="ellipsis")
+    table.add_column("Number", justify="right", style="yellow")
+    table.add_column("Name", style="green")
+    table.add_column("Hex", style="blue")
+    table.add_column("RGB", style="magenta")
+
+    colors = sorted((v, k) for k, v in ANSI_COLOR_NAMES.items())
+    for color_number, name in colors:
+        if "grey" in name:
+            continue
+        color_cell = Text(" " * 10, style=f"on {name}")
+        if color_number < 16:
+            table.add_row(color_cell, f"{color_number}", Text(f'"{name}"'))
+        else:
+            color = EIGHT_BIT_PALETTE[color_number]  # type: ignore[has-type]
+            table.add_row(
+                color_cell, str(color_number), Text(f'"{name}"'), color.hex, color.rgb
+            )
+
+    console.print(table)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/color_triplet.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/color_triplet.py
new file mode 100644
index 0000000..02cab32
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/color_triplet.py
@@ -0,0 +1,38 @@
+from typing import NamedTuple, Tuple
+
+
+class ColorTriplet(NamedTuple):
+    """The red, green, and blue components of a color."""
+
+    red: int
+    """Red component in 0 to 255 range."""
+    green: int
+    """Green component in 0 to 255 range."""
+    blue: int
+    """Blue component in 0 to 255 range."""
+
+    @property
+    def hex(self) -> str:
+        """get the color triplet in CSS style."""
+        red, green, blue = self
+        return f"#{red:02x}{green:02x}{blue:02x}"
+
+    @property
+    def rgb(self) -> str:
+        """The color in RGB format.
+
+        Returns:
+            str: An rgb color, e.g. ``"rgb(100,23,255)"``.
+        """
+        red, green, blue = self
+        return f"rgb({red},{green},{blue})"
+
+    @property
+    def normalized(self) -> Tuple[float, float, float]:
+        """Convert components into floats between 0 and 1.
+
+        Returns:
+            Tuple[float, float, float]: A tuple of three normalized colour components.
+        """
+        red, green, blue = self
+        return red / 255.0, green / 255.0, blue / 255.0
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/columns.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/columns.py
new file mode 100644
index 0000000..669a3a7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/columns.py
@@ -0,0 +1,187 @@
+from collections import defaultdict
+from itertools import chain
+from operator import itemgetter
+from typing import Dict, Iterable, List, Optional, Tuple
+
+from .align import Align, AlignMethod
+from .console import Console, ConsoleOptions, RenderableType, RenderResult
+from .constrain import Constrain
+from .measure import Measurement
+from .padding import Padding, PaddingDimensions
+from .table import Table
+from .text import TextType
+from .jupyter import JupyterMixin
+
+
+class Columns(JupyterMixin):
+    """Display renderables in neat columns.
+
+    Args:
+        renderables (Iterable[RenderableType]): Any number of Rich renderables (including str).
+        width (int, optional): The desired width of the columns, or None to auto detect. Defaults to None.
+        padding (PaddingDimensions, optional): Optional padding around cells. Defaults to (0, 1).
+        expand (bool, optional): Expand columns to full width. Defaults to False.
+        equal (bool, optional): Arrange in to equal sized columns. Defaults to False.
+        column_first (bool, optional): Align items from top to bottom (rather than left to right). Defaults to False.
+        right_to_left (bool, optional): Start column from right hand side. Defaults to False.
+        align (str, optional): Align value ("left", "right", or "center") or None for default. Defaults to None.
+        title (TextType, optional): Optional title for Columns.
+    """
+
+    def __init__(
+        self,
+        renderables: Optional[Iterable[RenderableType]] = None,
+        padding: PaddingDimensions = (0, 1),
+        *,
+        width: Optional[int] = None,
+        expand: bool = False,
+        equal: bool = False,
+        column_first: bool = False,
+        right_to_left: bool = False,
+        align: Optional[AlignMethod] = None,
+        title: Optional[TextType] = None,
+    ) -> None:
+        self.renderables = list(renderables or [])
+        self.width = width
+        self.padding = padding
+        self.expand = expand
+        self.equal = equal
+        self.column_first = column_first
+        self.right_to_left = right_to_left
+        self.align: Optional[AlignMethod] = align
+        self.title = title
+
+    def add_renderable(self, renderable: RenderableType) -> None:
+        """Add a renderable to the columns.
+
+        Args:
+            renderable (RenderableType): Any renderable object.
+        """
+        self.renderables.append(renderable)
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        render_str = console.render_str
+        renderables = [
+            render_str(renderable) if isinstance(renderable, str) else renderable
+            for renderable in self.renderables
+        ]
+        if not renderables:
+            return
+        _top, right, _bottom, left = Padding.unpack(self.padding)
+        width_padding = max(left, right)
+        max_width = options.max_width
+        widths: Dict[int, int] = defaultdict(int)
+        column_count = len(renderables)
+
+        get_measurement = Measurement.get
+        renderable_widths = [
+            get_measurement(console, options, renderable).maximum
+            for renderable in renderables
+        ]
+        if self.equal:
+            renderable_widths = [max(renderable_widths)] * len(renderable_widths)
+
+        def iter_renderables(
+            column_count: int,
+        ) -> Iterable[Tuple[int, Optional[RenderableType]]]:
+            item_count = len(renderables)
+            if self.column_first:
+                width_renderables = list(zip(renderable_widths, renderables))
+
+                column_lengths: List[int] = [item_count // column_count] * column_count
+                for col_no in range(item_count % column_count):
+                    column_lengths[col_no] += 1
+
+                row_count = (item_count + column_count - 1) // column_count
+                cells = [[-1] * column_count for _ in range(row_count)]
+                row = col = 0
+                for index in range(item_count):
+                    cells[row][col] = index
+                    column_lengths[col] -= 1
+                    if column_lengths[col]:
+                        row += 1
+                    else:
+                        col += 1
+                        row = 0
+                for index in chain.from_iterable(cells):
+                    if index == -1:
+                        break
+                    yield width_renderables[index]
+            else:
+                yield from zip(renderable_widths, renderables)
+            # Pad odd elements with spaces
+            if item_count % column_count:
+                for _ in range(column_count - (item_count % column_count)):
+                    yield 0, None
+
+        table = Table.grid(padding=self.padding, collapse_padding=True, pad_edge=False)
+        table.expand = self.expand
+        table.title = self.title
+
+        if self.width is not None:
+            column_count = (max_width) // (self.width + width_padding)
+            for _ in range(column_count):
+                table.add_column(width=self.width)
+        else:
+            while column_count > 1:
+                widths.clear()
+                column_no = 0
+                for renderable_width, _ in iter_renderables(column_count):
+                    widths[column_no] = max(widths[column_no], renderable_width)
+                    total_width = sum(widths.values()) + width_padding * (
+                        len(widths) - 1
+                    )
+                    if total_width > max_width:
+                        column_count = len(widths) - 1
+                        break
+                    else:
+                        column_no = (column_no + 1) % column_count
+                else:
+                    break
+
+        get_renderable = itemgetter(1)
+        _renderables = [
+            get_renderable(_renderable)
+            for _renderable in iter_renderables(column_count)
+        ]
+        if self.equal:
+            _renderables = [
+                None
+                if renderable is None
+                else Constrain(renderable, renderable_widths[0])
+                for renderable in _renderables
+            ]
+        if self.align:
+            align = self.align
+            _Align = Align
+            _renderables = [
+                None if renderable is None else _Align(renderable, align)
+                for renderable in _renderables
+            ]
+
+        right_to_left = self.right_to_left
+        add_row = table.add_row
+        for start in range(0, len(_renderables), column_count):
+            row = _renderables[start : start + column_count]
+            if right_to_left:
+                row = row[::-1]
+            add_row(*row)
+        yield table
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import os
+
+    console = Console()
+
+    files = [f"{i} {s}" for i, s in enumerate(sorted(os.listdir()))]
+    columns = Columns(files, padding=(0, 1), expand=False, equal=False)
+    console.print(columns)
+    console.rule()
+    columns.column_first = True
+    console.print(columns)
+    columns.right_to_left = True
+    console.rule()
+    console.print(columns)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/console.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/console.py
new file mode 100644
index 0000000..93a10b0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/console.py
@@ -0,0 +1,2572 @@
+import inspect
+import io
+import os
+import platform
+import sys
+import threading
+import zlib
+from abc import ABC, abstractmethod
+from dataclasses import dataclass, field
+from datetime import datetime
+from functools import wraps
+from getpass import getpass
+from html import escape
+from inspect import isclass
+from itertools import islice
+from math import ceil
+from time import monotonic
+from types import FrameType, ModuleType, TracebackType
+from typing import (
+    IO,
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Iterable,
+    List,
+    Mapping,
+    NamedTuple,
+    Optional,
+    TextIO,
+    Tuple,
+    Type,
+    Union,
+    cast,
+)
+
+if sys.version_info >= (3, 8):
+    from typing import Literal, Protocol, runtime_checkable
+else:
+    from pip._vendor.typing_extensions import (
+        Literal,
+        Protocol,
+        runtime_checkable,
+    )  # pragma: no cover
+
+from . import errors, themes
+from ._emoji_replace import _emoji_replace
+from ._export_format import CONSOLE_HTML_FORMAT, CONSOLE_SVG_FORMAT
+from ._log_render import FormatTimeCallable, LogRender
+from .align import Align, AlignMethod
+from .color import ColorSystem, blend_rgb
+from .control import Control
+from .emoji import EmojiVariant
+from .highlighter import NullHighlighter, ReprHighlighter
+from .markup import render as render_markup
+from .measure import Measurement, measure_renderables
+from .pager import Pager, SystemPager
+from .pretty import Pretty, is_expandable
+from .protocol import rich_cast
+from .region import Region
+from .scope import render_scope
+from .screen import Screen
+from .segment import Segment
+from .style import Style, StyleType
+from .styled import Styled
+from .terminal_theme import DEFAULT_TERMINAL_THEME, SVG_EXPORT_THEME, TerminalTheme
+from .text import Text, TextType
+from .theme import Theme, ThemeStack
+
+if TYPE_CHECKING:
+    from ._windows import WindowsConsoleFeatures
+    from .live import Live
+    from .status import Status
+
+JUPYTER_DEFAULT_COLUMNS = 115
+JUPYTER_DEFAULT_LINES = 100
+WINDOWS = platform.system() == "Windows"
+
+HighlighterType = Callable[[Union[str, "Text"]], "Text"]
+JustifyMethod = Literal["default", "left", "center", "right", "full"]
+OverflowMethod = Literal["fold", "crop", "ellipsis", "ignore"]
+
+
+class NoChange:
+    pass
+
+
+NO_CHANGE = NoChange()
+
+try:
+    _STDIN_FILENO = sys.__stdin__.fileno()
+except Exception:
+    _STDIN_FILENO = 0
+try:
+    _STDOUT_FILENO = sys.__stdout__.fileno()
+except Exception:
+    _STDOUT_FILENO = 1
+try:
+    _STDERR_FILENO = sys.__stderr__.fileno()
+except Exception:
+    _STDERR_FILENO = 2
+
+_STD_STREAMS = (_STDIN_FILENO, _STDOUT_FILENO, _STDERR_FILENO)
+_STD_STREAMS_OUTPUT = (_STDOUT_FILENO, _STDERR_FILENO)
+
+
+_TERM_COLORS = {"256color": ColorSystem.EIGHT_BIT, "16color": ColorSystem.STANDARD}
+
+
+class ConsoleDimensions(NamedTuple):
+    """Size of the terminal."""
+
+    width: int
+    """The width of the console in 'cells'."""
+    height: int
+    """The height of the console in lines."""
+
+
+@dataclass
+class ConsoleOptions:
+    """Options for __rich_console__ method."""
+
+    size: ConsoleDimensions
+    """Size of console."""
+    legacy_windows: bool
+    """legacy_windows: flag for legacy windows."""
+    min_width: int
+    """Minimum width of renderable."""
+    max_width: int
+    """Maximum width of renderable."""
+    is_terminal: bool
+    """True if the target is a terminal, otherwise False."""
+    encoding: str
+    """Encoding of terminal."""
+    max_height: int
+    """Height of container (starts as terminal)"""
+    justify: Optional[JustifyMethod] = None
+    """Justify value override for renderable."""
+    overflow: Optional[OverflowMethod] = None
+    """Overflow value override for renderable."""
+    no_wrap: Optional[bool] = False
+    """Disable wrapping for text."""
+    highlight: Optional[bool] = None
+    """Highlight override for render_str."""
+    markup: Optional[bool] = None
+    """Enable markup when rendering strings."""
+    height: Optional[int] = None
+
+    @property
+    def ascii_only(self) -> bool:
+        """Check if renderables should use ascii only."""
+        return not self.encoding.startswith("utf")
+
+    def copy(self) -> "ConsoleOptions":
+        """Return a copy of the options.
+
+        Returns:
+            ConsoleOptions: a copy of self.
+        """
+        options: ConsoleOptions = ConsoleOptions.__new__(ConsoleOptions)
+        options.__dict__ = self.__dict__.copy()
+        return options
+
+    def update(
+        self,
+        *,
+        width: Union[int, NoChange] = NO_CHANGE,
+        min_width: Union[int, NoChange] = NO_CHANGE,
+        max_width: Union[int, NoChange] = NO_CHANGE,
+        justify: Union[Optional[JustifyMethod], NoChange] = NO_CHANGE,
+        overflow: Union[Optional[OverflowMethod], NoChange] = NO_CHANGE,
+        no_wrap: Union[Optional[bool], NoChange] = NO_CHANGE,
+        highlight: Union[Optional[bool], NoChange] = NO_CHANGE,
+        markup: Union[Optional[bool], NoChange] = NO_CHANGE,
+        height: Union[Optional[int], NoChange] = NO_CHANGE,
+    ) -> "ConsoleOptions":
+        """Update values, return a copy."""
+        options = self.copy()
+        if not isinstance(width, NoChange):
+            options.min_width = options.max_width = max(0, width)
+        if not isinstance(min_width, NoChange):
+            options.min_width = min_width
+        if not isinstance(max_width, NoChange):
+            options.max_width = max_width
+        if not isinstance(justify, NoChange):
+            options.justify = justify
+        if not isinstance(overflow, NoChange):
+            options.overflow = overflow
+        if not isinstance(no_wrap, NoChange):
+            options.no_wrap = no_wrap
+        if not isinstance(highlight, NoChange):
+            options.highlight = highlight
+        if not isinstance(markup, NoChange):
+            options.markup = markup
+        if not isinstance(height, NoChange):
+            if height is not None:
+                options.max_height = height
+            options.height = None if height is None else max(0, height)
+        return options
+
+    def update_width(self, width: int) -> "ConsoleOptions":
+        """Update just the width, return a copy.
+
+        Args:
+            width (int): New width (sets both min_width and max_width)
+
+        Returns:
+            ~ConsoleOptions: New console options instance.
+        """
+        options = self.copy()
+        options.min_width = options.max_width = max(0, width)
+        return options
+
+    def update_height(self, height: int) -> "ConsoleOptions":
+        """Update the height, and return a copy.
+
+        Args:
+            height (int): New height
+
+        Returns:
+            ~ConsoleOptions: New Console options instance.
+        """
+        options = self.copy()
+        options.max_height = options.height = height
+        return options
+
+    def reset_height(self) -> "ConsoleOptions":
+        """Return a copy of the options with height set to ``None``.
+
+        Returns:
+            ~ConsoleOptions: New console options instance.
+        """
+        options = self.copy()
+        options.height = None
+        return options
+
+    def update_dimensions(self, width: int, height: int) -> "ConsoleOptions":
+        """Update the width and height, and return a copy.
+
+        Args:
+            width (int): New width (sets both min_width and max_width).
+            height (int): New height.
+
+        Returns:
+            ~ConsoleOptions: New console options instance.
+        """
+        options = self.copy()
+        options.min_width = options.max_width = max(0, width)
+        options.height = options.max_height = height
+        return options
+
+
+@runtime_checkable
+class RichCast(Protocol):
+    """An object that may be 'cast' to a console renderable."""
+
+    def __rich__(
+        self,
+    ) -> Union["ConsoleRenderable", "RichCast", str]:  # pragma: no cover
+        ...
+
+
+@runtime_checkable
+class ConsoleRenderable(Protocol):
+    """An object that supports the console protocol."""
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":  # pragma: no cover
+        ...
+
+
+# A type that may be rendered by Console.
+RenderableType = Union[ConsoleRenderable, RichCast, str]
+
+# The result of calling a __rich_console__ method.
+RenderResult = Iterable[Union[RenderableType, Segment]]
+
+_null_highlighter = NullHighlighter()
+
+
+class CaptureError(Exception):
+    """An error in the Capture context manager."""
+
+
+class NewLine:
+    """A renderable to generate new line(s)"""
+
+    def __init__(self, count: int = 1) -> None:
+        self.count = count
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Iterable[Segment]:
+        yield Segment("\n" * self.count)
+
+
+class ScreenUpdate:
+    """Render a list of lines at a given offset."""
+
+    def __init__(self, lines: List[List[Segment]], x: int, y: int) -> None:
+        self._lines = lines
+        self.x = x
+        self.y = y
+
+    def __rich_console__(
+        self, console: "Console", options: ConsoleOptions
+    ) -> RenderResult:
+        x = self.x
+        move_to = Control.move_to
+        for offset, line in enumerate(self._lines, self.y):
+            yield move_to(x, offset)
+            yield from line
+
+
+class Capture:
+    """Context manager to capture the result of printing to the console.
+    See :meth:`~rich.console.Console.capture` for how to use.
+
+    Args:
+        console (Console): A console instance to capture output.
+    """
+
+    def __init__(self, console: "Console") -> None:
+        self._console = console
+        self._result: Optional[str] = None
+
+    def __enter__(self) -> "Capture":
+        self._console.begin_capture()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self._result = self._console.end_capture()
+
+    def get(self) -> str:
+        """Get the result of the capture."""
+        if self._result is None:
+            raise CaptureError(
+                "Capture result is not available until context manager exits."
+            )
+        return self._result
+
+
+class ThemeContext:
+    """A context manager to use a temporary theme. See :meth:`~rich.console.Console.use_theme` for usage."""
+
+    def __init__(self, console: "Console", theme: Theme, inherit: bool = True) -> None:
+        self.console = console
+        self.theme = theme
+        self.inherit = inherit
+
+    def __enter__(self) -> "ThemeContext":
+        self.console.push_theme(self.theme)
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.console.pop_theme()
+
+
+class PagerContext:
+    """A context manager that 'pages' content. See :meth:`~rich.console.Console.pager` for usage."""
+
+    def __init__(
+        self,
+        console: "Console",
+        pager: Optional[Pager] = None,
+        styles: bool = False,
+        links: bool = False,
+    ) -> None:
+        self._console = console
+        self.pager = SystemPager() if pager is None else pager
+        self.styles = styles
+        self.links = links
+
+    def __enter__(self) -> "PagerContext":
+        self._console._enter_buffer()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        if exc_type is None:
+            with self._console._lock:
+                buffer: List[Segment] = self._console._buffer[:]
+                del self._console._buffer[:]
+                segments: Iterable[Segment] = buffer
+                if not self.styles:
+                    segments = Segment.strip_styles(segments)
+                elif not self.links:
+                    segments = Segment.strip_links(segments)
+                content = self._console._render_buffer(segments)
+            self.pager.show(content)
+        self._console._exit_buffer()
+
+
+class ScreenContext:
+    """A context manager that enables an alternative screen. See :meth:`~rich.console.Console.screen` for usage."""
+
+    def __init__(
+        self, console: "Console", hide_cursor: bool, style: StyleType = ""
+    ) -> None:
+        self.console = console
+        self.hide_cursor = hide_cursor
+        self.screen = Screen(style=style)
+        self._changed = False
+
+    def update(
+        self, *renderables: RenderableType, style: Optional[StyleType] = None
+    ) -> None:
+        """Update the screen.
+
+        Args:
+            renderable (RenderableType, optional): Optional renderable to replace current renderable,
+                or None for no change. Defaults to None.
+            style: (Style, optional): Replacement style, or None for no change. Defaults to None.
+        """
+        if renderables:
+            self.screen.renderable = (
+                Group(*renderables) if len(renderables) > 1 else renderables[0]
+            )
+        if style is not None:
+            self.screen.style = style
+        self.console.print(self.screen, end="")
+
+    def __enter__(self) -> "ScreenContext":
+        self._changed = self.console.set_alt_screen(True)
+        if self._changed and self.hide_cursor:
+            self.console.show_cursor(False)
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        if self._changed:
+            self.console.set_alt_screen(False)
+            if self.hide_cursor:
+                self.console.show_cursor(True)
+
+
+class Group:
+    """Takes a group of renderables and returns a renderable object that renders the group.
+
+    Args:
+        renderables (Iterable[RenderableType]): An iterable of renderable objects.
+        fit (bool, optional): Fit dimension of group to contents, or fill available space. Defaults to True.
+    """
+
+    def __init__(self, *renderables: "RenderableType", fit: bool = True) -> None:
+        self._renderables = renderables
+        self.fit = fit
+        self._render: Optional[List[RenderableType]] = None
+
+    @property
+    def renderables(self) -> List["RenderableType"]:
+        if self._render is None:
+            self._render = list(self._renderables)
+        return self._render
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        if self.fit:
+            return measure_renderables(console, options, self.renderables)
+        else:
+            return Measurement(options.max_width, options.max_width)
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> RenderResult:
+        yield from self.renderables
+
+
+def group(fit: bool = True) -> Callable[..., Callable[..., Group]]:
+    """A decorator that turns an iterable of renderables in to a group.
+
+    Args:
+        fit (bool, optional): Fit dimension of group to contents, or fill available space. Defaults to True.
+    """
+
+    def decorator(
+        method: Callable[..., Iterable[RenderableType]]
+    ) -> Callable[..., Group]:
+        """Convert a method that returns an iterable of renderables in to a Group."""
+
+        @wraps(method)
+        def _replace(*args: Any, **kwargs: Any) -> Group:
+            renderables = method(*args, **kwargs)
+            return Group(*renderables, fit=fit)
+
+        return _replace
+
+    return decorator
+
+
+def _is_jupyter() -> bool:  # pragma: no cover
+    """Check if we're running in a Jupyter notebook."""
+    try:
+        get_ipython  # type: ignore[name-defined]
+    except NameError:
+        return False
+    ipython = get_ipython()  # type: ignore[name-defined]
+    shell = ipython.__class__.__name__
+    if "google.colab" in str(ipython.__class__) or shell == "ZMQInteractiveShell":
+        return True  # Jupyter notebook or qtconsole
+    elif shell == "TerminalInteractiveShell":
+        return False  # Terminal running IPython
+    else:
+        return False  # Other type (?)
+
+
+COLOR_SYSTEMS = {
+    "standard": ColorSystem.STANDARD,
+    "256": ColorSystem.EIGHT_BIT,
+    "truecolor": ColorSystem.TRUECOLOR,
+    "windows": ColorSystem.WINDOWS,
+}
+
+_COLOR_SYSTEMS_NAMES = {system: name for name, system in COLOR_SYSTEMS.items()}
+
+
+@dataclass
+class ConsoleThreadLocals(threading.local):
+    """Thread local values for Console context."""
+
+    theme_stack: ThemeStack
+    buffer: List[Segment] = field(default_factory=list)
+    buffer_index: int = 0
+
+
+class RenderHook(ABC):
+    """Provides hooks in to the render process."""
+
+    @abstractmethod
+    def process_renderables(
+        self, renderables: List[ConsoleRenderable]
+    ) -> List[ConsoleRenderable]:
+        """Called with a list of objects to render.
+
+        This method can return a new list of renderables, or modify and return the same list.
+
+        Args:
+            renderables (List[ConsoleRenderable]): A number of renderable objects.
+
+        Returns:
+            List[ConsoleRenderable]: A replacement list of renderables.
+        """
+
+
+_windows_console_features: Optional["WindowsConsoleFeatures"] = None
+
+
+def get_windows_console_features() -> "WindowsConsoleFeatures":  # pragma: no cover
+    global _windows_console_features
+    if _windows_console_features is not None:
+        return _windows_console_features
+    from ._windows import get_windows_console_features
+
+    _windows_console_features = get_windows_console_features()
+    return _windows_console_features
+
+
+def detect_legacy_windows() -> bool:
+    """Detect legacy Windows."""
+    return WINDOWS and not get_windows_console_features().vt
+
+
+class Console:
+    """A high level console interface.
+
+    Args:
+        color_system (str, optional): The color system supported by your terminal,
+            either ``"standard"``, ``"256"`` or ``"truecolor"``. Leave as ``"auto"`` to autodetect.
+        force_terminal (Optional[bool], optional): Enable/disable terminal control codes, or None to auto-detect terminal. Defaults to None.
+        force_jupyter (Optional[bool], optional): Enable/disable Jupyter rendering, or None to auto-detect Jupyter. Defaults to None.
+        force_interactive (Optional[bool], optional): Enable/disable interactive mode, or None to auto detect. Defaults to None.
+        soft_wrap (Optional[bool], optional): Set soft wrap default on print method. Defaults to False.
+        theme (Theme, optional): An optional style theme object, or ``None`` for default theme.
+        stderr (bool, optional): Use stderr rather than stdout if ``file`` is not specified. Defaults to False.
+        file (IO, optional): A file object where the console should write to. Defaults to stdout.
+        quiet (bool, Optional): Boolean to suppress all output. Defaults to False.
+        width (int, optional): The width of the terminal. Leave as default to auto-detect width.
+        height (int, optional): The height of the terminal. Leave as default to auto-detect height.
+        style (StyleType, optional): Style to apply to all output, or None for no style. Defaults to None.
+        no_color (Optional[bool], optional): Enabled no color mode, or None to auto detect. Defaults to None.
+        tab_size (int, optional): Number of spaces used to replace a tab character. Defaults to 8.
+        record (bool, optional): Boolean to enable recording of terminal output,
+            required to call :meth:`export_html`, :meth:`export_svg`, and :meth:`export_text`. Defaults to False.
+        markup (bool, optional): Boolean to enable :ref:`console_markup`. Defaults to True.
+        emoji (bool, optional): Enable emoji code. Defaults to True.
+        emoji_variant (str, optional): Optional emoji variant, either "text" or "emoji". Defaults to None.
+        highlight (bool, optional): Enable automatic highlighting. Defaults to True.
+        log_time (bool, optional): Boolean to enable logging of time by :meth:`log` methods. Defaults to True.
+        log_path (bool, optional): Boolean to enable the logging of the caller by :meth:`log`. Defaults to True.
+        log_time_format (Union[str, TimeFormatterCallable], optional): If ``log_time`` is enabled, either string for strftime or callable that formats the time. Defaults to "[%X] ".
+        highlighter (HighlighterType, optional): Default highlighter.
+        legacy_windows (bool, optional): Enable legacy Windows mode, or ``None`` to auto detect. Defaults to ``None``.
+        safe_box (bool, optional): Restrict box options that don't render on legacy Windows.
+        get_datetime (Callable[[], datetime], optional): Callable that gets the current time as a datetime.datetime object (used by Console.log),
+            or None for datetime.now.
+        get_time (Callable[[], time], optional): Callable that gets the current time in seconds, default uses time.monotonic.
+    """
+
+    _environ: Mapping[str, str] = os.environ
+
+    def __init__(
+        self,
+        *,
+        color_system: Optional[
+            Literal["auto", "standard", "256", "truecolor", "windows"]
+        ] = "auto",
+        force_terminal: Optional[bool] = None,
+        force_jupyter: Optional[bool] = None,
+        force_interactive: Optional[bool] = None,
+        soft_wrap: bool = False,
+        theme: Optional[Theme] = None,
+        stderr: bool = False,
+        file: Optional[IO[str]] = None,
+        quiet: bool = False,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+        style: Optional[StyleType] = None,
+        no_color: Optional[bool] = None,
+        tab_size: int = 8,
+        record: bool = False,
+        markup: bool = True,
+        emoji: bool = True,
+        emoji_variant: Optional[EmojiVariant] = None,
+        highlight: bool = True,
+        log_time: bool = True,
+        log_path: bool = True,
+        log_time_format: Union[str, FormatTimeCallable] = "[%X]",
+        highlighter: Optional["HighlighterType"] = ReprHighlighter(),
+        legacy_windows: Optional[bool] = None,
+        safe_box: bool = True,
+        get_datetime: Optional[Callable[[], datetime]] = None,
+        get_time: Optional[Callable[[], float]] = None,
+        _environ: Optional[Mapping[str, str]] = None,
+    ):
+        # Copy of os.environ allows us to replace it for testing
+        if _environ is not None:
+            self._environ = _environ
+
+        self.is_jupyter = _is_jupyter() if force_jupyter is None else force_jupyter
+        if self.is_jupyter:
+            if width is None:
+                jupyter_columns = self._environ.get("JUPYTER_COLUMNS")
+                if jupyter_columns is not None and jupyter_columns.isdigit():
+                    width = int(jupyter_columns)
+                else:
+                    width = JUPYTER_DEFAULT_COLUMNS
+            if height is None:
+                jupyter_lines = self._environ.get("JUPYTER_LINES")
+                if jupyter_lines is not None and jupyter_lines.isdigit():
+                    height = int(jupyter_lines)
+                else:
+                    height = JUPYTER_DEFAULT_LINES
+
+        self.tab_size = tab_size
+        self.record = record
+        self._markup = markup
+        self._emoji = emoji
+        self._emoji_variant: Optional[EmojiVariant] = emoji_variant
+        self._highlight = highlight
+        self.legacy_windows: bool = (
+            (detect_legacy_windows() and not self.is_jupyter)
+            if legacy_windows is None
+            else legacy_windows
+        )
+
+        if width is None:
+            columns = self._environ.get("COLUMNS")
+            if columns is not None and columns.isdigit():
+                width = int(columns) - self.legacy_windows
+        if height is None:
+            lines = self._environ.get("LINES")
+            if lines is not None and lines.isdigit():
+                height = int(lines)
+
+        self.soft_wrap = soft_wrap
+        self._width = width
+        self._height = height
+
+        self._color_system: Optional[ColorSystem]
+        self._force_terminal = force_terminal
+        self._file = file
+        self.quiet = quiet
+        self.stderr = stderr
+
+        if color_system is None:
+            self._color_system = None
+        elif color_system == "auto":
+            self._color_system = self._detect_color_system()
+        else:
+            self._color_system = COLOR_SYSTEMS[color_system]
+
+        self._lock = threading.RLock()
+        self._log_render = LogRender(
+            show_time=log_time,
+            show_path=log_path,
+            time_format=log_time_format,
+        )
+        self.highlighter: HighlighterType = highlighter or _null_highlighter
+        self.safe_box = safe_box
+        self.get_datetime = get_datetime or datetime.now
+        self.get_time = get_time or monotonic
+        self.style = style
+        self.no_color = (
+            no_color if no_color is not None else "NO_COLOR" in self._environ
+        )
+        self.is_interactive = (
+            (self.is_terminal and not self.is_dumb_terminal)
+            if force_interactive is None
+            else force_interactive
+        )
+
+        self._record_buffer_lock = threading.RLock()
+        self._thread_locals = ConsoleThreadLocals(
+            theme_stack=ThemeStack(themes.DEFAULT if theme is None else theme)
+        )
+        self._record_buffer: List[Segment] = []
+        self._render_hooks: List[RenderHook] = []
+        self._live: Optional["Live"] = None
+        self._is_alt_screen = False
+
+    def __repr__(self) -> str:
+        return f"<console width={self.width} {str(self._color_system)}>"
+
+    @property
+    def file(self) -> IO[str]:
+        """Get the file object to write to."""
+        file = self._file or (sys.stderr if self.stderr else sys.stdout)
+        file = getattr(file, "rich_proxied_file", file)
+        return file
+
+    @file.setter
+    def file(self, new_file: IO[str]) -> None:
+        """Set a new file object."""
+        self._file = new_file
+
+    @property
+    def _buffer(self) -> List[Segment]:
+        """Get a thread local buffer."""
+        return self._thread_locals.buffer
+
+    @property
+    def _buffer_index(self) -> int:
+        """Get a thread local buffer."""
+        return self._thread_locals.buffer_index
+
+    @_buffer_index.setter
+    def _buffer_index(self, value: int) -> None:
+        self._thread_locals.buffer_index = value
+
+    @property
+    def _theme_stack(self) -> ThemeStack:
+        """Get the thread local theme stack."""
+        return self._thread_locals.theme_stack
+
+    def _detect_color_system(self) -> Optional[ColorSystem]:
+        """Detect color system from env vars."""
+        if self.is_jupyter:
+            return ColorSystem.TRUECOLOR
+        if not self.is_terminal or self.is_dumb_terminal:
+            return None
+        if WINDOWS:  # pragma: no cover
+            if self.legacy_windows:  # pragma: no cover
+                return ColorSystem.WINDOWS
+            windows_console_features = get_windows_console_features()
+            return (
+                ColorSystem.TRUECOLOR
+                if windows_console_features.truecolor
+                else ColorSystem.EIGHT_BIT
+            )
+        else:
+            color_term = self._environ.get("COLORTERM", "").strip().lower()
+            if color_term in ("truecolor", "24bit"):
+                return ColorSystem.TRUECOLOR
+            term = self._environ.get("TERM", "").strip().lower()
+            _term_name, _hyphen, colors = term.rpartition("-")
+            color_system = _TERM_COLORS.get(colors, ColorSystem.STANDARD)
+            return color_system
+
+    def _enter_buffer(self) -> None:
+        """Enter in to a buffer context, and buffer all output."""
+        self._buffer_index += 1
+
+    def _exit_buffer(self) -> None:
+        """Leave buffer context, and render content if required."""
+        self._buffer_index -= 1
+        self._check_buffer()
+
+    def set_live(self, live: "Live") -> None:
+        """Set Live instance. Used by Live context manager.
+
+        Args:
+            live (Live): Live instance using this Console.
+
+        Raises:
+            errors.LiveError: If this Console has a Live context currently active.
+        """
+        with self._lock:
+            if self._live is not None:
+                raise errors.LiveError("Only one live display may be active at once")
+            self._live = live
+
+    def clear_live(self) -> None:
+        """Clear the Live instance."""
+        with self._lock:
+            self._live = None
+
+    def push_render_hook(self, hook: RenderHook) -> None:
+        """Add a new render hook to the stack.
+
+        Args:
+            hook (RenderHook): Render hook instance.
+        """
+        with self._lock:
+            self._render_hooks.append(hook)
+
+    def pop_render_hook(self) -> None:
+        """Pop the last renderhook from the stack."""
+        with self._lock:
+            self._render_hooks.pop()
+
+    def __enter__(self) -> "Console":
+        """Own context manager to enter buffer context."""
+        self._enter_buffer()
+        return self
+
+    def __exit__(self, exc_type: Any, exc_value: Any, traceback: Any) -> None:
+        """Exit buffer context."""
+        self._exit_buffer()
+
+    def begin_capture(self) -> None:
+        """Begin capturing console output. Call :meth:`end_capture` to exit capture mode and return output."""
+        self._enter_buffer()
+
+    def end_capture(self) -> str:
+        """End capture mode and return captured string.
+
+        Returns:
+            str: Console output.
+        """
+        render_result = self._render_buffer(self._buffer)
+        del self._buffer[:]
+        self._exit_buffer()
+        return render_result
+
+    def push_theme(self, theme: Theme, *, inherit: bool = True) -> None:
+        """Push a new theme on to the top of the stack, replacing the styles from the previous theme.
+        Generally speaking, you should call :meth:`~rich.console.Console.use_theme` to get a context manager, rather
+        than calling this method directly.
+
+        Args:
+            theme (Theme): A theme instance.
+            inherit (bool, optional): Inherit existing styles. Defaults to True.
+        """
+        self._theme_stack.push_theme(theme, inherit=inherit)
+
+    def pop_theme(self) -> None:
+        """Remove theme from top of stack, restoring previous theme."""
+        self._theme_stack.pop_theme()
+
+    def use_theme(self, theme: Theme, *, inherit: bool = True) -> ThemeContext:
+        """Use a different theme for the duration of the context manager.
+
+        Args:
+            theme (Theme): Theme instance to user.
+            inherit (bool, optional): Inherit existing console styles. Defaults to True.
+
+        Returns:
+            ThemeContext: [description]
+        """
+        return ThemeContext(self, theme, inherit)
+
+    @property
+    def color_system(self) -> Optional[str]:
+        """Get color system string.
+
+        Returns:
+            Optional[str]: "standard", "256" or "truecolor".
+        """
+
+        if self._color_system is not None:
+            return _COLOR_SYSTEMS_NAMES[self._color_system]
+        else:
+            return None
+
+    @property
+    def encoding(self) -> str:
+        """Get the encoding of the console file, e.g. ``"utf-8"``.
+
+        Returns:
+            str: A standard encoding string.
+        """
+        return (getattr(self.file, "encoding", "utf-8") or "utf-8").lower()
+
+    @property
+    def is_terminal(self) -> bool:
+        """Check if the console is writing to a terminal.
+
+        Returns:
+            bool: True if the console writing to a device capable of
+            understanding terminal codes, otherwise False.
+        """
+        if self._force_terminal is not None:
+            return self._force_terminal
+
+        if hasattr(sys.stdin, "__module__") and sys.stdin.__module__.startswith(
+            "idlelib"
+        ):
+            # Return False for Idle which claims to be a tty but can't handle ansi codes
+            return False
+
+        isatty: Optional[Callable[[], bool]] = getattr(self.file, "isatty", None)
+        try:
+            return False if isatty is None else isatty()
+        except ValueError:
+            # in some situation (at the end of a pytest run for example) isatty() can raise
+            # ValueError: I/O operation on closed file
+            # return False because we aren't in a terminal anymore
+            return False
+
+    @property
+    def is_dumb_terminal(self) -> bool:
+        """Detect dumb terminal.
+
+        Returns:
+            bool: True if writing to a dumb terminal, otherwise False.
+
+        """
+        _term = self._environ.get("TERM", "")
+        is_dumb = _term.lower() in ("dumb", "unknown")
+        return self.is_terminal and is_dumb
+
+    @property
+    def options(self) -> ConsoleOptions:
+        """Get default console options."""
+        return ConsoleOptions(
+            max_height=self.size.height,
+            size=self.size,
+            legacy_windows=self.legacy_windows,
+            min_width=1,
+            max_width=self.width,
+            encoding=self.encoding,
+            is_terminal=self.is_terminal,
+        )
+
+    @property
+    def size(self) -> ConsoleDimensions:
+        """Get the size of the console.
+
+        Returns:
+            ConsoleDimensions: A named tuple containing the dimensions.
+        """
+
+        if self._width is not None and self._height is not None:
+            return ConsoleDimensions(self._width - self.legacy_windows, self._height)
+
+        if self.is_dumb_terminal:
+            return ConsoleDimensions(80, 25)
+
+        width: Optional[int] = None
+        height: Optional[int] = None
+
+        if WINDOWS:  # pragma: no cover
+            try:
+                width, height = os.get_terminal_size()
+            except (AttributeError, ValueError, OSError):  # Probably not a terminal
+                pass
+        else:
+            for file_descriptor in _STD_STREAMS:
+                try:
+                    width, height = os.get_terminal_size(file_descriptor)
+                except (AttributeError, ValueError, OSError):
+                    pass
+                else:
+                    break
+
+        columns = self._environ.get("COLUMNS")
+        if columns is not None and columns.isdigit():
+            width = int(columns)
+        lines = self._environ.get("LINES")
+        if lines is not None and lines.isdigit():
+            height = int(lines)
+
+        # get_terminal_size can report 0, 0 if run from pseudo-terminal
+        width = width or 80
+        height = height or 25
+        return ConsoleDimensions(
+            width - self.legacy_windows if self._width is None else self._width,
+            height if self._height is None else self._height,
+        )
+
+    @size.setter
+    def size(self, new_size: Tuple[int, int]) -> None:
+        """Set a new size for the terminal.
+
+        Args:
+            new_size (Tuple[int, int]): New width and height.
+        """
+        width, height = new_size
+        self._width = width
+        self._height = height
+
+    @property
+    def width(self) -> int:
+        """Get the width of the console.
+
+        Returns:
+            int: The width (in characters) of the console.
+        """
+        return self.size.width
+
+    @width.setter
+    def width(self, width: int) -> None:
+        """Set width.
+
+        Args:
+            width (int): New width.
+        """
+        self._width = width
+
+    @property
+    def height(self) -> int:
+        """Get the height of the console.
+
+        Returns:
+            int: The height (in lines) of the console.
+        """
+        return self.size.height
+
+    @height.setter
+    def height(self, height: int) -> None:
+        """Set height.
+
+        Args:
+            height (int): new height.
+        """
+        self._height = height
+
+    def bell(self) -> None:
+        """Play a 'bell' sound (if supported by the terminal)."""
+        self.control(Control.bell())
+
+    def capture(self) -> Capture:
+        """A context manager to *capture* the result of print() or log() in a string,
+        rather than writing it to the console.
+
+        Example:
+            >>> from rich.console import Console
+            >>> console = Console()
+            >>> with console.capture() as capture:
+            ...     console.print("[bold magenta]Hello World[/]")
+            >>> print(capture.get())
+
+        Returns:
+            Capture: Context manager with disables writing to the terminal.
+        """
+        capture = Capture(self)
+        return capture
+
+    def pager(
+        self, pager: Optional[Pager] = None, styles: bool = False, links: bool = False
+    ) -> PagerContext:
+        """A context manager to display anything printed within a "pager". The pager application
+        is defined by the system and will typically support at least pressing a key to scroll.
+
+        Args:
+            pager (Pager, optional): A pager object, or None to use :class:`~rich.pager.SystemPager`. Defaults to None.
+            styles (bool, optional): Show styles in pager. Defaults to False.
+            links (bool, optional): Show links in pager. Defaults to False.
+
+        Example:
+            >>> from rich.console import Console
+            >>> from rich.__main__ import make_test_card
+            >>> console = Console()
+            >>> with console.pager():
+                    console.print(make_test_card())
+
+        Returns:
+            PagerContext: A context manager.
+        """
+        return PagerContext(self, pager=pager, styles=styles, links=links)
+
+    def line(self, count: int = 1) -> None:
+        """Write new line(s).
+
+        Args:
+            count (int, optional): Number of new lines. Defaults to 1.
+        """
+
+        assert count >= 0, "count must be >= 0"
+        self.print(NewLine(count))
+
+    def clear(self, home: bool = True) -> None:
+        """Clear the screen.
+
+        Args:
+            home (bool, optional): Also move the cursor to 'home' position. Defaults to True.
+        """
+        if home:
+            self.control(Control.clear(), Control.home())
+        else:
+            self.control(Control.clear())
+
+    def status(
+        self,
+        status: RenderableType,
+        *,
+        spinner: str = "dots",
+        spinner_style: str = "status.spinner",
+        speed: float = 1.0,
+        refresh_per_second: float = 12.5,
+    ) -> "Status":
+        """Display a status and spinner.
+
+        Args:
+            status (RenderableType): A status renderable (str or Text typically).
+            spinner (str, optional): Name of spinner animation (see python -m rich.spinner). Defaults to "dots".
+            spinner_style (StyleType, optional): Style of spinner. Defaults to "status.spinner".
+            speed (float, optional): Speed factor for spinner animation. Defaults to 1.0.
+            refresh_per_second (float, optional): Number of refreshes per second. Defaults to 12.5.
+
+        Returns:
+            Status: A Status object that may be used as a context manager.
+        """
+        from .status import Status
+
+        status_renderable = Status(
+            status,
+            console=self,
+            spinner=spinner,
+            spinner_style=spinner_style,
+            speed=speed,
+            refresh_per_second=refresh_per_second,
+        )
+        return status_renderable
+
+    def show_cursor(self, show: bool = True) -> bool:
+        """Show or hide the cursor.
+
+        Args:
+            show (bool, optional): Set visibility of the cursor.
+        """
+        if self.is_terminal:
+            self.control(Control.show_cursor(show))
+            return True
+        return False
+
+    def set_alt_screen(self, enable: bool = True) -> bool:
+        """Enables alternative screen mode.
+
+        Note, if you enable this mode, you should ensure that is disabled before
+        the application exits. See :meth:`~rich.Console.screen` for a context manager
+        that handles this for you.
+
+        Args:
+            enable (bool, optional): Enable (True) or disable (False) alternate screen. Defaults to True.
+
+        Returns:
+            bool: True if the control codes were written.
+
+        """
+        changed = False
+        if self.is_terminal and not self.legacy_windows:
+            self.control(Control.alt_screen(enable))
+            changed = True
+            self._is_alt_screen = enable
+        return changed
+
+    @property
+    def is_alt_screen(self) -> bool:
+        """Check if the alt screen was enabled.
+
+        Returns:
+            bool: True if the alt screen was enabled, otherwise False.
+        """
+        return self._is_alt_screen
+
+    def set_window_title(self, title: str) -> bool:
+        """Set the title of the console terminal window.
+
+        Warning: There is no means within Rich of "resetting" the window title to its
+        previous value, meaning the title you set will persist even after your application
+        exits.
+
+        ``fish`` shell resets the window title before and after each command by default,
+        negating this issue. Windows Terminal and command prompt will also reset the title for you.
+        Most other shells and terminals, however, do not do this.
+
+        Some terminals may require configuration changes before you can set the title.
+        Some terminals may not support setting the title at all.
+
+        Other software (including the terminal itself, the shell, custom prompts, plugins, etc.)
+        may also set the terminal window title. This could result in whatever value you write
+        using this method being overwritten.
+
+        Args:
+            title (str): The new title of the terminal window.
+
+        Returns:
+            bool: True if the control code to change the terminal title was
+                written, otherwise False. Note that a return value of True
+                does not guarantee that the window title has actually changed,
+                since the feature may be unsupported/disabled in some terminals.
+        """
+        if self.is_terminal:
+            self.control(Control.title(title))
+            return True
+        return False
+
+    def screen(
+        self, hide_cursor: bool = True, style: Optional[StyleType] = None
+    ) -> "ScreenContext":
+        """Context manager to enable and disable 'alternative screen' mode.
+
+        Args:
+            hide_cursor (bool, optional): Also hide the cursor. Defaults to False.
+            style (Style, optional): Optional style for screen. Defaults to None.
+
+        Returns:
+            ~ScreenContext: Context which enables alternate screen on enter, and disables it on exit.
+        """
+        return ScreenContext(self, hide_cursor=hide_cursor, style=style or "")
+
+    def measure(
+        self, renderable: RenderableType, *, options: Optional[ConsoleOptions] = None
+    ) -> Measurement:
+        """Measure a renderable. Returns a :class:`~rich.measure.Measurement` object which contains
+        information regarding the number of characters required to print the renderable.
+
+        Args:
+            renderable (RenderableType): Any renderable or string.
+            options (Optional[ConsoleOptions], optional): Options to use when measuring, or None
+                to use default options. Defaults to None.
+
+        Returns:
+            Measurement: A measurement of the renderable.
+        """
+        measurement = Measurement.get(self, options or self.options, renderable)
+        return measurement
+
+    def render(
+        self, renderable: RenderableType, options: Optional[ConsoleOptions] = None
+    ) -> Iterable[Segment]:
+        """Render an object in to an iterable of `Segment` instances.
+
+        This method contains the logic for rendering objects with the console protocol.
+        You are unlikely to need to use it directly, unless you are extending the library.
+
+        Args:
+            renderable (RenderableType): An object supporting the console protocol, or
+                an object that may be converted to a string.
+            options (ConsoleOptions, optional): An options object, or None to use self.options. Defaults to None.
+
+        Returns:
+            Iterable[Segment]: An iterable of segments that may be rendered.
+        """
+
+        _options = options or self.options
+        if _options.max_width < 1:
+            # No space to render anything. This prevents potential recursion errors.
+            return
+        render_iterable: RenderResult
+
+        renderable = rich_cast(renderable)
+        if hasattr(renderable, "__rich_console__") and not isclass(renderable):
+            render_iterable = renderable.__rich_console__(self, _options)  # type: ignore[union-attr]
+        elif isinstance(renderable, str):
+            text_renderable = self.render_str(
+                renderable, highlight=_options.highlight, markup=_options.markup
+            )
+            render_iterable = text_renderable.__rich_console__(self, _options)
+        else:
+            raise errors.NotRenderableError(
+                f"Unable to render {renderable!r}; "
+                "A str, Segment or object with __rich_console__ method is required"
+            )
+
+        try:
+            iter_render = iter(render_iterable)
+        except TypeError:
+            raise errors.NotRenderableError(
+                f"object {render_iterable!r} is not renderable"
+            )
+        _Segment = Segment
+        _options = _options.reset_height()
+        for render_output in iter_render:
+            if isinstance(render_output, _Segment):
+                yield render_output
+            else:
+                yield from self.render(render_output, _options)
+
+    def render_lines(
+        self,
+        renderable: RenderableType,
+        options: Optional[ConsoleOptions] = None,
+        *,
+        style: Optional[Style] = None,
+        pad: bool = True,
+        new_lines: bool = False,
+    ) -> List[List[Segment]]:
+        """Render objects in to a list of lines.
+
+        The output of render_lines is useful when further formatting of rendered console text
+        is required, such as the Panel class which draws a border around any renderable object.
+
+        Args:
+            renderable (RenderableType): Any object renderable in the console.
+            options (Optional[ConsoleOptions], optional): Console options, or None to use self.options. Default to ``None``.
+            style (Style, optional): Optional style to apply to renderables. Defaults to ``None``.
+            pad (bool, optional): Pad lines shorter than render width. Defaults to ``True``.
+            new_lines (bool, optional): Include "\n" characters at end of lines.
+
+        Returns:
+            List[List[Segment]]: A list of lines, where a line is a list of Segment objects.
+        """
+        with self._lock:
+            render_options = options or self.options
+            _rendered = self.render(renderable, render_options)
+            if style:
+                _rendered = Segment.apply_style(_rendered, style)
+
+            render_height = render_options.height
+            if render_height is not None:
+                render_height = max(0, render_height)
+
+            lines = list(
+                islice(
+                    Segment.split_and_crop_lines(
+                        _rendered,
+                        render_options.max_width,
+                        include_new_lines=new_lines,
+                        pad=pad,
+                        style=style,
+                    ),
+                    None,
+                    render_height,
+                )
+            )
+            if render_options.height is not None:
+                extra_lines = render_options.height - len(lines)
+                if extra_lines > 0:
+                    pad_line = [
+                        [Segment(" " * render_options.max_width, style), Segment("\n")]
+                        if new_lines
+                        else [Segment(" " * render_options.max_width, style)]
+                    ]
+                    lines.extend(pad_line * extra_lines)
+
+            return lines
+
+    def render_str(
+        self,
+        text: str,
+        *,
+        style: Union[str, Style] = "",
+        justify: Optional[JustifyMethod] = None,
+        overflow: Optional[OverflowMethod] = None,
+        emoji: Optional[bool] = None,
+        markup: Optional[bool] = None,
+        highlight: Optional[bool] = None,
+        highlighter: Optional[HighlighterType] = None,
+    ) -> "Text":
+        """Convert a string to a Text instance. This is called automatically if
+        you print or log a string.
+
+        Args:
+            text (str): Text to render.
+            style (Union[str, Style], optional): Style to apply to rendered text.
+            justify (str, optional): Justify method: "default", "left", "center", "full", or "right". Defaults to ``None``.
+            overflow (str, optional): Overflow method: "crop", "fold", or "ellipsis". Defaults to ``None``.
+            emoji (Optional[bool], optional): Enable emoji, or ``None`` to use Console default.
+            markup (Optional[bool], optional): Enable markup, or ``None`` to use Console default.
+            highlight (Optional[bool], optional): Enable highlighting, or ``None`` to use Console default.
+            highlighter (HighlighterType, optional): Optional highlighter to apply.
+        Returns:
+            ConsoleRenderable: Renderable object.
+
+        """
+        emoji_enabled = emoji or (emoji is None and self._emoji)
+        markup_enabled = markup or (markup is None and self._markup)
+        highlight_enabled = highlight or (highlight is None and self._highlight)
+
+        if markup_enabled:
+            rich_text = render_markup(
+                text,
+                style=style,
+                emoji=emoji_enabled,
+                emoji_variant=self._emoji_variant,
+            )
+            rich_text.justify = justify
+            rich_text.overflow = overflow
+        else:
+            rich_text = Text(
+                _emoji_replace(text, default_variant=self._emoji_variant)
+                if emoji_enabled
+                else text,
+                justify=justify,
+                overflow=overflow,
+                style=style,
+            )
+
+        _highlighter = (highlighter or self.highlighter) if highlight_enabled else None
+        if _highlighter is not None:
+            highlight_text = _highlighter(str(rich_text))
+            highlight_text.copy_styles(rich_text)
+            return highlight_text
+
+        return rich_text
+
+    def get_style(
+        self, name: Union[str, Style], *, default: Optional[Union[Style, str]] = None
+    ) -> Style:
+        """Get a Style instance by its theme name or parse a definition.
+
+        Args:
+            name (str): The name of a style or a style definition.
+
+        Returns:
+            Style: A Style object.
+
+        Raises:
+            MissingStyle: If no style could be parsed from name.
+
+        """
+        if isinstance(name, Style):
+            return name
+
+        try:
+            style = self._theme_stack.get(name)
+            if style is None:
+                style = Style.parse(name)
+            return style.copy() if style.link else style
+        except errors.StyleSyntaxError as error:
+            if default is not None:
+                return self.get_style(default)
+            raise errors.MissingStyle(
+                f"Failed to get style {name!r}; {error}"
+            ) from None
+
+    def _collect_renderables(
+        self,
+        objects: Iterable[Any],
+        sep: str,
+        end: str,
+        *,
+        justify: Optional[JustifyMethod] = None,
+        emoji: Optional[bool] = None,
+        markup: Optional[bool] = None,
+        highlight: Optional[bool] = None,
+    ) -> List[ConsoleRenderable]:
+        """Combine a number of renderables and text into one renderable.
+
+        Args:
+            objects (Iterable[Any]): Anything that Rich can render.
+            sep (str): String to write between print data.
+            end (str): String to write at end of print data.
+            justify (str, optional): One of "left", "right", "center", or "full". Defaults to ``None``.
+            emoji (Optional[bool], optional): Enable emoji code, or ``None`` to use console default.
+            markup (Optional[bool], optional): Enable markup, or ``None`` to use console default.
+            highlight (Optional[bool], optional): Enable automatic highlighting, or ``None`` to use console default.
+
+        Returns:
+            List[ConsoleRenderable]: A list of things to render.
+        """
+        renderables: List[ConsoleRenderable] = []
+        _append = renderables.append
+        text: List[Text] = []
+        append_text = text.append
+
+        append = _append
+        if justify in ("left", "center", "right"):
+
+            def align_append(renderable: RenderableType) -> None:
+                _append(Align(renderable, cast(AlignMethod, justify)))
+
+            append = align_append
+
+        _highlighter: HighlighterType = _null_highlighter
+        if highlight or (highlight is None and self._highlight):
+            _highlighter = self.highlighter
+
+        def check_text() -> None:
+            if text:
+                sep_text = Text(sep, justify=justify, end=end)
+                append(sep_text.join(text))
+                del text[:]
+
+        for renderable in objects:
+            renderable = rich_cast(renderable)
+            if isinstance(renderable, str):
+                append_text(
+                    self.render_str(
+                        renderable, emoji=emoji, markup=markup, highlighter=_highlighter
+                    )
+                )
+            elif isinstance(renderable, Text):
+                append_text(renderable)
+            elif isinstance(renderable, ConsoleRenderable):
+                check_text()
+                append(renderable)
+            elif is_expandable(renderable):
+                check_text()
+                append(Pretty(renderable, highlighter=_highlighter))
+            else:
+                append_text(_highlighter(str(renderable)))
+
+        check_text()
+
+        if self.style is not None:
+            style = self.get_style(self.style)
+            renderables = [Styled(renderable, style) for renderable in renderables]
+
+        return renderables
+
+    def rule(
+        self,
+        title: TextType = "",
+        *,
+        characters: str = "─",
+        style: Union[str, Style] = "rule.line",
+        align: AlignMethod = "center",
+    ) -> None:
+        """Draw a line with optional centered title.
+
+        Args:
+            title (str, optional): Text to render over the rule. Defaults to "".
+            characters (str, optional): Character(s) to form the line. Defaults to "─".
+            style (str, optional): Style of line. Defaults to "rule.line".
+            align (str, optional): How to align the title, one of "left", "center", or "right". Defaults to "center".
+        """
+        from .rule import Rule
+
+        rule = Rule(title=title, characters=characters, style=style, align=align)
+        self.print(rule)
+
+    def control(self, *control: Control) -> None:
+        """Insert non-printing control codes.
+
+        Args:
+            control_codes (str): Control codes, such as those that may move the cursor.
+        """
+        if not self.is_dumb_terminal:
+            with self:
+                self._buffer.extend(_control.segment for _control in control)
+
+    def out(
+        self,
+        *objects: Any,
+        sep: str = " ",
+        end: str = "\n",
+        style: Optional[Union[str, Style]] = None,
+        highlight: Optional[bool] = None,
+    ) -> None:
+        """Output to the terminal. This is a low-level way of writing to the terminal which unlike
+        :meth:`~rich.console.Console.print` won't pretty print, wrap text, or apply markup, but will
+        optionally apply highlighting and a basic style.
+
+        Args:
+            sep (str, optional): String to write between print data. Defaults to " ".
+            end (str, optional): String to write at end of print data. Defaults to "\\\\n".
+            style (Union[str, Style], optional): A style to apply to output. Defaults to None.
+            highlight (Optional[bool], optional): Enable automatic highlighting, or ``None`` to use
+                console default. Defaults to ``None``.
+        """
+        raw_output: str = sep.join(str(_object) for _object in objects)
+        self.print(
+            raw_output,
+            style=style,
+            highlight=highlight,
+            emoji=False,
+            markup=False,
+            no_wrap=True,
+            overflow="ignore",
+            crop=False,
+            end=end,
+        )
+
+    def print(
+        self,
+        *objects: Any,
+        sep: str = " ",
+        end: str = "\n",
+        style: Optional[Union[str, Style]] = None,
+        justify: Optional[JustifyMethod] = None,
+        overflow: Optional[OverflowMethod] = None,
+        no_wrap: Optional[bool] = None,
+        emoji: Optional[bool] = None,
+        markup: Optional[bool] = None,
+        highlight: Optional[bool] = None,
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+        crop: bool = True,
+        soft_wrap: Optional[bool] = None,
+        new_line_start: bool = False,
+    ) -> None:
+        """Print to the console.
+
+        Args:
+            objects (positional args): Objects to log to the terminal.
+            sep (str, optional): String to write between print data. Defaults to " ".
+            end (str, optional): String to write at end of print data. Defaults to "\\\\n".
+            style (Union[str, Style], optional): A style to apply to output. Defaults to None.
+            justify (str, optional): Justify method: "default", "left", "right", "center", or "full". Defaults to ``None``.
+            overflow (str, optional): Overflow method: "ignore", "crop", "fold", or "ellipsis". Defaults to None.
+            no_wrap (Optional[bool], optional): Disable word wrapping. Defaults to None.
+            emoji (Optional[bool], optional): Enable emoji code, or ``None`` to use console default. Defaults to ``None``.
+            markup (Optional[bool], optional): Enable markup, or ``None`` to use console default. Defaults to ``None``.
+            highlight (Optional[bool], optional): Enable automatic highlighting, or ``None`` to use console default. Defaults to ``None``.
+            width (Optional[int], optional): Width of output, or ``None`` to auto-detect. Defaults to ``None``.
+            crop (Optional[bool], optional): Crop output to width of terminal. Defaults to True.
+            soft_wrap (bool, optional): Enable soft wrap mode which disables word wrapping and cropping of text or ``None`` for
+                Console default. Defaults to ``None``.
+            new_line_start (bool, False): Insert a new line at the start if the output contains more than one line. Defaults to ``False``.
+        """
+        if not objects:
+            objects = (NewLine(),)
+
+        if soft_wrap is None:
+            soft_wrap = self.soft_wrap
+        if soft_wrap:
+            if no_wrap is None:
+                no_wrap = True
+            if overflow is None:
+                overflow = "ignore"
+            crop = False
+        render_hooks = self._render_hooks[:]
+        with self:
+            renderables = self._collect_renderables(
+                objects,
+                sep,
+                end,
+                justify=justify,
+                emoji=emoji,
+                markup=markup,
+                highlight=highlight,
+            )
+            for hook in render_hooks:
+                renderables = hook.process_renderables(renderables)
+            render_options = self.options.update(
+                justify=justify,
+                overflow=overflow,
+                width=min(width, self.width) if width is not None else NO_CHANGE,
+                height=height,
+                no_wrap=no_wrap,
+                markup=markup,
+                highlight=highlight,
+            )
+
+            new_segments: List[Segment] = []
+            extend = new_segments.extend
+            render = self.render
+            if style is None:
+                for renderable in renderables:
+                    extend(render(renderable, render_options))
+            else:
+                for renderable in renderables:
+                    extend(
+                        Segment.apply_style(
+                            render(renderable, render_options), self.get_style(style)
+                        )
+                    )
+            if new_line_start:
+                if (
+                    len("".join(segment.text for segment in new_segments).splitlines())
+                    > 1
+                ):
+                    new_segments.insert(0, Segment.line())
+            if crop:
+                buffer_extend = self._buffer.extend
+                for line in Segment.split_and_crop_lines(
+                    new_segments, self.width, pad=False
+                ):
+                    buffer_extend(line)
+            else:
+                self._buffer.extend(new_segments)
+
+    def print_json(
+        self,
+        json: Optional[str] = None,
+        *,
+        data: Any = None,
+        indent: Union[None, int, str] = 2,
+        highlight: bool = True,
+        skip_keys: bool = False,
+        ensure_ascii: bool = True,
+        check_circular: bool = True,
+        allow_nan: bool = True,
+        default: Optional[Callable[[Any], Any]] = None,
+        sort_keys: bool = False,
+    ) -> None:
+        """Pretty prints JSON. Output will be valid JSON.
+
+        Args:
+            json (Optional[str]): A string containing JSON.
+            data (Any): If json is not supplied, then encode this data.
+            indent (Union[None, int, str], optional): Number of spaces to indent. Defaults to 2.
+            highlight (bool, optional): Enable highlighting of output: Defaults to True.
+            skip_keys (bool, optional): Skip keys not of a basic type. Defaults to False.
+            ensure_ascii (bool, optional): Escape all non-ascii characters. Defaults to False.
+            check_circular (bool, optional): Check for circular references. Defaults to True.
+            allow_nan (bool, optional): Allow NaN and Infinity values. Defaults to True.
+            default (Callable, optional): A callable that converts values that can not be encoded
+                in to something that can be JSON encoded. Defaults to None.
+            sort_keys (bool, optional): Sort dictionary keys. Defaults to False.
+        """
+        from pip._vendor.rich.json import JSON
+
+        if json is None:
+            json_renderable = JSON.from_data(
+                data,
+                indent=indent,
+                highlight=highlight,
+                skip_keys=skip_keys,
+                ensure_ascii=ensure_ascii,
+                check_circular=check_circular,
+                allow_nan=allow_nan,
+                default=default,
+                sort_keys=sort_keys,
+            )
+        else:
+            if not isinstance(json, str):
+                raise TypeError(
+                    f"json must be str. Did you mean print_json(data={json!r}) ?"
+                )
+            json_renderable = JSON(
+                json,
+                indent=indent,
+                highlight=highlight,
+                skip_keys=skip_keys,
+                ensure_ascii=ensure_ascii,
+                check_circular=check_circular,
+                allow_nan=allow_nan,
+                default=default,
+                sort_keys=sort_keys,
+            )
+        self.print(json_renderable, soft_wrap=True)
+
+    def update_screen(
+        self,
+        renderable: RenderableType,
+        *,
+        region: Optional[Region] = None,
+        options: Optional[ConsoleOptions] = None,
+    ) -> None:
+        """Update the screen at a given offset.
+
+        Args:
+            renderable (RenderableType): A Rich renderable.
+            region (Region, optional): Region of screen to update, or None for entire screen. Defaults to None.
+            x (int, optional): x offset. Defaults to 0.
+            y (int, optional): y offset. Defaults to 0.
+
+        Raises:
+            errors.NoAltScreen: If the Console isn't in alt screen mode.
+
+        """
+        if not self.is_alt_screen:
+            raise errors.NoAltScreen("Alt screen must be enabled to call update_screen")
+        render_options = options or self.options
+        if region is None:
+            x = y = 0
+            render_options = render_options.update_dimensions(
+                render_options.max_width, render_options.height or self.height
+            )
+        else:
+            x, y, width, height = region
+            render_options = render_options.update_dimensions(width, height)
+
+        lines = self.render_lines(renderable, options=render_options)
+        self.update_screen_lines(lines, x, y)
+
+    def update_screen_lines(
+        self, lines: List[List[Segment]], x: int = 0, y: int = 0
+    ) -> None:
+        """Update lines of the screen at a given offset.
+
+        Args:
+            lines (List[List[Segment]]): Rendered lines (as produced by :meth:`~rich.Console.render_lines`).
+            x (int, optional): x offset (column no). Defaults to 0.
+            y (int, optional): y offset (column no). Defaults to 0.
+
+        Raises:
+            errors.NoAltScreen: If the Console isn't in alt screen mode.
+        """
+        if not self.is_alt_screen:
+            raise errors.NoAltScreen("Alt screen must be enabled to call update_screen")
+        screen_update = ScreenUpdate(lines, x, y)
+        segments = self.render(screen_update)
+        self._buffer.extend(segments)
+        self._check_buffer()
+
+    def print_exception(
+        self,
+        *,
+        width: Optional[int] = 100,
+        extra_lines: int = 3,
+        theme: Optional[str] = None,
+        word_wrap: bool = False,
+        show_locals: bool = False,
+        suppress: Iterable[Union[str, ModuleType]] = (),
+        max_frames: int = 100,
+    ) -> None:
+        """Prints a rich render of the last exception and traceback.
+
+        Args:
+            width (Optional[int], optional): Number of characters used to render code. Defaults to 100.
+            extra_lines (int, optional): Additional lines of code to render. Defaults to 3.
+            theme (str, optional): Override pygments theme used in traceback
+            word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
+            show_locals (bool, optional): Enable display of local variables. Defaults to False.
+            suppress (Iterable[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
+            max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
+        """
+        from .traceback import Traceback
+
+        traceback = Traceback(
+            width=width,
+            extra_lines=extra_lines,
+            theme=theme,
+            word_wrap=word_wrap,
+            show_locals=show_locals,
+            suppress=suppress,
+            max_frames=max_frames,
+        )
+        self.print(traceback)
+
+    @staticmethod
+    def _caller_frame_info(
+        offset: int,
+        currentframe: Callable[[], Optional[FrameType]] = inspect.currentframe,
+    ) -> Tuple[str, int, Dict[str, Any]]:
+        """Get caller frame information.
+
+        Args:
+            offset (int): the caller offset within the current frame stack.
+            currentframe (Callable[[], Optional[FrameType]], optional): the callable to use to
+                retrieve the current frame. Defaults to ``inspect.currentframe``.
+
+        Returns:
+            Tuple[str, int, Dict[str, Any]]: A tuple containing the filename, the line number and
+                the dictionary of local variables associated with the caller frame.
+
+        Raises:
+            RuntimeError: If the stack offset is invalid.
+        """
+        # Ignore the frame of this local helper
+        offset += 1
+
+        frame = currentframe()
+        if frame is not None:
+            # Use the faster currentframe where implemented
+            while offset and frame is not None:
+                frame = frame.f_back
+                offset -= 1
+            assert frame is not None
+            return frame.f_code.co_filename, frame.f_lineno, frame.f_locals
+        else:
+            # Fallback to the slower stack
+            frame_info = inspect.stack()[offset]
+            return frame_info.filename, frame_info.lineno, frame_info.frame.f_locals
+
+    def log(
+        self,
+        *objects: Any,
+        sep: str = " ",
+        end: str = "\n",
+        style: Optional[Union[str, Style]] = None,
+        justify: Optional[JustifyMethod] = None,
+        emoji: Optional[bool] = None,
+        markup: Optional[bool] = None,
+        highlight: Optional[bool] = None,
+        log_locals: bool = False,
+        _stack_offset: int = 1,
+    ) -> None:
+        """Log rich content to the terminal.
+
+        Args:
+            objects (positional args): Objects to log to the terminal.
+            sep (str, optional): String to write between print data. Defaults to " ".
+            end (str, optional): String to write at end of print data. Defaults to "\\\\n".
+            style (Union[str, Style], optional): A style to apply to output. Defaults to None.
+            justify (str, optional): One of "left", "right", "center", or "full". Defaults to ``None``.
+            overflow (str, optional): Overflow method: "crop", "fold", or "ellipsis". Defaults to None.
+            emoji (Optional[bool], optional): Enable emoji code, or ``None`` to use console default. Defaults to None.
+            markup (Optional[bool], optional): Enable markup, or ``None`` to use console default. Defaults to None.
+            highlight (Optional[bool], optional): Enable automatic highlighting, or ``None`` to use console default. Defaults to None.
+            log_locals (bool, optional): Boolean to enable logging of locals where ``log()``
+                was called. Defaults to False.
+            _stack_offset (int, optional): Offset of caller from end of call stack. Defaults to 1.
+        """
+        if not objects:
+            objects = (NewLine(),)
+
+        render_hooks = self._render_hooks[:]
+
+        with self:
+            renderables = self._collect_renderables(
+                objects,
+                sep,
+                end,
+                justify=justify,
+                emoji=emoji,
+                markup=markup,
+                highlight=highlight,
+            )
+            if style is not None:
+                renderables = [Styled(renderable, style) for renderable in renderables]
+
+            filename, line_no, locals = self._caller_frame_info(_stack_offset)
+            link_path = None if filename.startswith("<") else os.path.abspath(filename)
+            path = filename.rpartition(os.sep)[-1]
+            if log_locals:
+                locals_map = {
+                    key: value
+                    for key, value in locals.items()
+                    if not key.startswith("__")
+                }
+                renderables.append(render_scope(locals_map, title="[i]locals"))
+
+            renderables = [
+                self._log_render(
+                    self,
+                    renderables,
+                    log_time=self.get_datetime(),
+                    path=path,
+                    line_no=line_no,
+                    link_path=link_path,
+                )
+            ]
+            for hook in render_hooks:
+                renderables = hook.process_renderables(renderables)
+            new_segments: List[Segment] = []
+            extend = new_segments.extend
+            render = self.render
+            render_options = self.options
+            for renderable in renderables:
+                extend(render(renderable, render_options))
+            buffer_extend = self._buffer.extend
+            for line in Segment.split_and_crop_lines(
+                new_segments, self.width, pad=False
+            ):
+                buffer_extend(line)
+
+    def _check_buffer(self) -> None:
+        """Check if the buffer may be rendered. Render it if it can (e.g. Console.quiet is False)
+        Rendering is supported on Windows, Unix and Jupyter environments. For
+        legacy Windows consoles, the win32 API is called directly.
+        This method will also record what it renders if recording is enabled via Console.record.
+        """
+        if self.quiet:
+            del self._buffer[:]
+            return
+        with self._lock:
+            if self.record:
+                with self._record_buffer_lock:
+                    self._record_buffer.extend(self._buffer[:])
+
+            if self._buffer_index == 0:
+
+                if self.is_jupyter:  # pragma: no cover
+                    from .jupyter import display
+
+                    display(self._buffer, self._render_buffer(self._buffer[:]))
+                    del self._buffer[:]
+                else:
+                    if WINDOWS:
+                        use_legacy_windows_render = False
+                        if self.legacy_windows:
+                            try:
+                                use_legacy_windows_render = (
+                                    self.file.fileno() in _STD_STREAMS_OUTPUT
+                                )
+                            except (ValueError, io.UnsupportedOperation):
+                                pass
+
+                        if use_legacy_windows_render:
+                            from pip._vendor.rich._win32_console import LegacyWindowsTerm
+                            from pip._vendor.rich._windows_renderer import legacy_windows_render
+
+                            legacy_windows_render(
+                                self._buffer[:], LegacyWindowsTerm(self.file)
+                            )
+                        else:
+                            # Either a non-std stream on legacy Windows, or modern Windows.
+                            text = self._render_buffer(self._buffer[:])
+                            # https://bugs.python.org/issue37871
+                            write = self.file.write
+                            for line in text.splitlines(True):
+                                try:
+                                    write(line)
+                                except UnicodeEncodeError as error:
+                                    error.reason = f"{error.reason}\n*** You may need to add PYTHONIOENCODING=utf-8 to your environment ***"
+                                    raise
+                    else:
+                        text = self._render_buffer(self._buffer[:])
+                        try:
+                            self.file.write(text)
+                        except UnicodeEncodeError as error:
+                            error.reason = f"{error.reason}\n*** You may need to add PYTHONIOENCODING=utf-8 to your environment ***"
+                            raise
+
+                    self.file.flush()
+                    del self._buffer[:]
+
+    def _render_buffer(self, buffer: Iterable[Segment]) -> str:
+        """Render buffered output, and clear buffer."""
+        output: List[str] = []
+        append = output.append
+        color_system = self._color_system
+        legacy_windows = self.legacy_windows
+        not_terminal = not self.is_terminal
+        if self.no_color and color_system:
+            buffer = Segment.remove_color(buffer)
+        for text, style, control in buffer:
+            if style:
+                append(
+                    style.render(
+                        text,
+                        color_system=color_system,
+                        legacy_windows=legacy_windows,
+                    )
+                )
+            elif not (not_terminal and control):
+                append(text)
+
+        rendered = "".join(output)
+        return rendered
+
+    def input(
+        self,
+        prompt: TextType = "",
+        *,
+        markup: bool = True,
+        emoji: bool = True,
+        password: bool = False,
+        stream: Optional[TextIO] = None,
+    ) -> str:
+        """Displays a prompt and waits for input from the user. The prompt may contain color / style.
+
+        It works in the same way as Python's builtin :func:`input` function and provides elaborate line editing and history features if Python's builtin :mod:`readline` module is previously loaded.
+
+        Args:
+            prompt (Union[str, Text]): Text to render in the prompt.
+            markup (bool, optional): Enable console markup (requires a str prompt). Defaults to True.
+            emoji (bool, optional): Enable emoji (requires a str prompt). Defaults to True.
+            password: (bool, optional): Hide typed text. Defaults to False.
+            stream: (TextIO, optional): Optional file to read input from (rather than stdin). Defaults to None.
+
+        Returns:
+            str: Text read from stdin.
+        """
+        if prompt:
+            self.print(prompt, markup=markup, emoji=emoji, end="")
+        if password:
+            result = getpass("", stream=stream)
+        else:
+            if stream:
+                result = stream.readline()
+            else:
+                result = input()
+        return result
+
+    def export_text(self, *, clear: bool = True, styles: bool = False) -> str:
+        """Generate text from console contents (requires record=True argument in constructor).
+
+        Args:
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``.
+            styles (bool, optional): If ``True``, ansi escape codes will be included. ``False`` for plain text.
+                Defaults to ``False``.
+
+        Returns:
+            str: String containing console contents.
+
+        """
+        assert (
+            self.record
+        ), "To export console contents set record=True in the constructor or instance"
+
+        with self._record_buffer_lock:
+            if styles:
+                text = "".join(
+                    (style.render(text) if style else text)
+                    for text, style, _ in self._record_buffer
+                )
+            else:
+                text = "".join(
+                    segment.text
+                    for segment in self._record_buffer
+                    if not segment.control
+                )
+            if clear:
+                del self._record_buffer[:]
+        return text
+
+    def save_text(self, path: str, *, clear: bool = True, styles: bool = False) -> None:
+        """Generate text from console and save to a given location (requires record=True argument in constructor).
+
+        Args:
+            path (str): Path to write text files.
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``.
+            styles (bool, optional): If ``True``, ansi style codes will be included. ``False`` for plain text.
+                Defaults to ``False``.
+
+        """
+        text = self.export_text(clear=clear, styles=styles)
+        with open(path, "wt", encoding="utf-8") as write_file:
+            write_file.write(text)
+
+    def export_html(
+        self,
+        *,
+        theme: Optional[TerminalTheme] = None,
+        clear: bool = True,
+        code_format: Optional[str] = None,
+        inline_styles: bool = False,
+    ) -> str:
+        """Generate HTML from console contents (requires record=True argument in constructor).
+
+        Args:
+            theme (TerminalTheme, optional): TerminalTheme object containing console colors.
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``.
+            code_format (str, optional): Format string to render HTML. In addition to '{foreground}',
+                '{background}', and '{code}', should contain '{stylesheet}' if inline_styles is ``False``.
+            inline_styles (bool, optional): If ``True`` styles will be inlined in to spans, which makes files
+                larger but easier to cut and paste markup. If ``False``, styles will be embedded in a style tag.
+                Defaults to False.
+
+        Returns:
+            str: String containing console contents as HTML.
+        """
+        assert (
+            self.record
+        ), "To export console contents set record=True in the constructor or instance"
+        fragments: List[str] = []
+        append = fragments.append
+        _theme = theme or DEFAULT_TERMINAL_THEME
+        stylesheet = ""
+
+        render_code_format = CONSOLE_HTML_FORMAT if code_format is None else code_format
+
+        with self._record_buffer_lock:
+            if inline_styles:
+                for text, style, _ in Segment.filter_control(
+                    Segment.simplify(self._record_buffer)
+                ):
+                    text = escape(text)
+                    if style:
+                        rule = style.get_html_style(_theme)
+                        if style.link:
+                            text = f'<a href="{style.link}">{text}</a>'
+                        text = f'<span style="{rule}">{text}</span>' if rule else text
+                    append(text)
+            else:
+                styles: Dict[str, int] = {}
+                for text, style, _ in Segment.filter_control(
+                    Segment.simplify(self._record_buffer)
+                ):
+                    text = escape(text)
+                    if style:
+                        rule = style.get_html_style(_theme)
+                        style_number = styles.setdefault(rule, len(styles) + 1)
+                        if style.link:
+                            text = f'<a class="r{style_number}" href="{style.link}">{text}</a>'
+                        else:
+                            text = f'<span class="r{style_number}">{text}</span>'
+                    append(text)
+                stylesheet_rules: List[str] = []
+                stylesheet_append = stylesheet_rules.append
+                for style_rule, style_number in styles.items():
+                    if style_rule:
+                        stylesheet_append(f".r{style_number} {{{style_rule}}}")
+                stylesheet = "\n".join(stylesheet_rules)
+
+            rendered_code = render_code_format.format(
+                code="".join(fragments),
+                stylesheet=stylesheet,
+                foreground=_theme.foreground_color.hex,
+                background=_theme.background_color.hex,
+            )
+            if clear:
+                del self._record_buffer[:]
+        return rendered_code
+
+    def save_html(
+        self,
+        path: str,
+        *,
+        theme: Optional[TerminalTheme] = None,
+        clear: bool = True,
+        code_format: str = CONSOLE_HTML_FORMAT,
+        inline_styles: bool = False,
+    ) -> None:
+        """Generate HTML from console contents and write to a file (requires record=True argument in constructor).
+
+        Args:
+            path (str): Path to write html file.
+            theme (TerminalTheme, optional): TerminalTheme object containing console colors.
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``.
+            code_format (str, optional): Format string to render HTML. In addition to '{foreground}',
+                '{background}', and '{code}', should contain '{stylesheet}' if inline_styles is ``False``.
+            inline_styles (bool, optional): If ``True`` styles will be inlined in to spans, which makes files
+                larger but easier to cut and paste markup. If ``False``, styles will be embedded in a style tag.
+                Defaults to False.
+
+        """
+        html = self.export_html(
+            theme=theme,
+            clear=clear,
+            code_format=code_format,
+            inline_styles=inline_styles,
+        )
+        with open(path, "wt", encoding="utf-8") as write_file:
+            write_file.write(html)
+
+    def export_svg(
+        self,
+        *,
+        title: str = "Rich",
+        theme: Optional[TerminalTheme] = None,
+        clear: bool = True,
+        code_format: str = CONSOLE_SVG_FORMAT,
+    ) -> str:
+        """
+        Generate an SVG from the console contents (requires record=True in Console constructor).
+
+        Args:
+            path (str): The path to write the SVG to.
+            title (str): The title of the tab in the output image
+            theme (TerminalTheme, optional): The ``TerminalTheme`` object to use to style the terminal
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``
+            code_format (str): Format string used to generate the SVG. Rich will inject a number of variables
+                into the string in order to form the final SVG output. The default template used and the variables
+                injected by Rich can be found by inspecting the ``console.CONSOLE_SVG_FORMAT`` variable.
+        """
+
+        from pip._vendor.rich.cells import cell_len
+
+        style_cache: Dict[Style, str] = {}
+
+        def get_svg_style(style: Style) -> str:
+            """Convert a Style to CSS rules for SVG."""
+            if style in style_cache:
+                return style_cache[style]
+            css_rules = []
+            color = (
+                _theme.foreground_color
+                if (style.color is None or style.color.is_default)
+                else style.color.get_truecolor(_theme)
+            )
+            bgcolor = (
+                _theme.background_color
+                if (style.bgcolor is None or style.bgcolor.is_default)
+                else style.bgcolor.get_truecolor(_theme)
+            )
+            if style.reverse:
+                color, bgcolor = bgcolor, color
+            if style.dim:
+                color = blend_rgb(color, bgcolor, 0.4)
+            css_rules.append(f"fill: {color.hex}")
+            if style.bold:
+                css_rules.append("font-weight: bold")
+            if style.italic:
+                css_rules.append("font-style: italic;")
+            if style.underline:
+                css_rules.append("text-decoration: underline;")
+            if style.strike:
+                css_rules.append("text-decoration: line-through;")
+
+            css = ";".join(css_rules)
+            style_cache[style] = css
+            return css
+
+        _theme = theme or SVG_EXPORT_THEME
+
+        width = self.width
+        char_height = 20
+        char_width = char_height * 0.61
+        line_height = char_height * 1.22
+
+        margin_top = 1
+        margin_right = 1
+        margin_bottom = 1
+        margin_left = 1
+
+        padding_top = 40
+        padding_right = 8
+        padding_bottom = 8
+        padding_left = 8
+
+        padding_width = padding_left + padding_right
+        padding_height = padding_top + padding_bottom
+        margin_width = margin_left + margin_right
+        margin_height = margin_top + margin_bottom
+
+        text_backgrounds: List[str] = []
+        text_group: List[str] = []
+        classes: Dict[str, int] = {}
+        style_no = 1
+
+        def escape_text(text: str) -> str:
+            """HTML escape text and replace spaces with nbsp."""
+            return escape(text).replace(" ", "&#160;")
+
+        def make_tag(
+            name: str, content: Optional[str] = None, **attribs: object
+        ) -> str:
+            """Make a tag from name, content, and attributes."""
+
+            def stringify(value: object) -> str:
+                if isinstance(value, (float)):
+                    return format(value, "g")
+                return str(value)
+
+            tag_attribs = " ".join(
+                f'{k.lstrip("_").replace("_", "-")}="{stringify(v)}"'
+                for k, v in attribs.items()
+            )
+            return (
+                f"<{name} {tag_attribs}>{content}</{name}>"
+                if content
+                else f"<{name} {tag_attribs}/>"
+            )
+
+        with self._record_buffer_lock:
+            segments = list(Segment.filter_control(self._record_buffer))
+            if clear:
+                self._record_buffer.clear()
+
+        unique_id = "terminal-" + str(
+            zlib.adler32(
+                ("".join(segment.text for segment in segments)).encode(
+                    "utf-8", "ignore"
+                )
+                + title.encode("utf-8", "ignore")
+            )
+        )
+        y = 0
+        for y, line in enumerate(Segment.split_and_crop_lines(segments, length=width)):
+            x = 0
+            for text, style, _control in line:
+                style = style or Style()
+                rules = get_svg_style(style)
+                if rules not in classes:
+                    classes[rules] = style_no
+                    style_no += 1
+                class_name = f"r{classes[rules]}"
+
+                if style.reverse:
+                    has_background = True
+                    background = (
+                        _theme.foreground_color.hex
+                        if style.color is None
+                        else style.color.get_truecolor(_theme).hex
+                    )
+                else:
+                    bgcolor = style.bgcolor
+                    has_background = bgcolor is not None and not bgcolor.is_default
+                    background = (
+                        _theme.background_color.hex
+                        if style.bgcolor is None
+                        else style.bgcolor.get_truecolor(_theme).hex
+                    )
+
+                text_length = cell_len(text)
+                if has_background:
+                    text_backgrounds.append(
+                        make_tag(
+                            "rect",
+                            fill=background,
+                            x=x * char_width,
+                            y=y * line_height + 1.5,
+                            width=char_width * text_length,
+                            height=line_height + 0.25,
+                            shape_rendering="crispEdges",
+                        )
+                    )
+
+                if text != " " * len(text):
+                    text_group.append(
+                        make_tag(
+                            "text",
+                            escape_text(text),
+                            _class=f"{unique_id}-{class_name}",
+                            x=x * char_width,
+                            y=y * line_height + char_height,
+                            textLength=char_width * len(text),
+                            clip_path=f"url(#{unique_id}-line-{y})",
+                        )
+                    )
+                x += cell_len(text)
+
+        line_offsets = [line_no * line_height + 1.5 for line_no in range(y)]
+        lines = "\n".join(
+            f"""<clipPath id="{unique_id}-line-{line_no}">
+    {make_tag("rect", x=0, y=offset, width=char_width * width, height=line_height + 0.25)}
+            </clipPath>"""
+            for line_no, offset in enumerate(line_offsets)
+        )
+
+        styles = "\n".join(
+            f".{unique_id}-r{rule_no} {{ {css} }}" for css, rule_no in classes.items()
+        )
+        backgrounds = "".join(text_backgrounds)
+        matrix = "".join(text_group)
+
+        terminal_width = ceil(width * char_width + padding_width)
+        terminal_height = (y + 1) * line_height + padding_height
+        chrome = make_tag(
+            "rect",
+            fill=_theme.background_color.hex,
+            stroke="rgba(255,255,255,0.35)",
+            stroke_width="1",
+            x=margin_left,
+            y=margin_top,
+            width=terminal_width,
+            height=terminal_height,
+            rx=8,
+        )
+
+        title_color = _theme.foreground_color.hex
+        if title:
+            chrome += make_tag(
+                "text",
+                escape_text(title),
+                _class=f"{unique_id}-title",
+                fill=title_color,
+                text_anchor="middle",
+                x=terminal_width // 2,
+                y=margin_top + char_height + 6,
+            )
+        chrome += f"""
+            <g transform="translate(26,22)">
+            <circle cx="0" cy="0" r="7" fill="#ff5f57"/>
+            <circle cx="22" cy="0" r="7" fill="#febc2e"/>
+            <circle cx="44" cy="0" r="7" fill="#28c840"/>
+            </g>
+        """
+
+        svg = code_format.format(
+            unique_id=unique_id,
+            char_width=char_width,
+            char_height=char_height,
+            line_height=line_height,
+            terminal_width=char_width * width - 1,
+            terminal_height=(y + 1) * line_height - 1,
+            width=terminal_width + margin_width,
+            height=terminal_height + margin_height,
+            terminal_x=margin_left + padding_left,
+            terminal_y=margin_top + padding_top,
+            styles=styles,
+            chrome=chrome,
+            backgrounds=backgrounds,
+            matrix=matrix,
+            lines=lines,
+        )
+        return svg
+
+    def save_svg(
+        self,
+        path: str,
+        *,
+        title: str = "Rich",
+        theme: Optional[TerminalTheme] = None,
+        clear: bool = True,
+        code_format: str = CONSOLE_SVG_FORMAT,
+    ) -> None:
+        """Generate an SVG file from the console contents (requires record=True in Console constructor).
+
+        Args:
+            path (str): The path to write the SVG to.
+            title (str): The title of the tab in the output image
+            theme (TerminalTheme, optional): The ``TerminalTheme`` object to use to style the terminal
+            clear (bool, optional): Clear record buffer after exporting. Defaults to ``True``
+            code_format (str): Format string used to generate the SVG. Rich will inject a number of variables
+                into the string in order to form the final SVG output. The default template used and the variables
+                injected by Rich can be found by inspecting the ``console.CONSOLE_SVG_FORMAT`` variable.
+        """
+        svg = self.export_svg(
+            title=title,
+            theme=theme,
+            clear=clear,
+            code_format=code_format,
+        )
+        with open(path, "wt", encoding="utf-8") as write_file:
+            write_file.write(svg)
+
+
+def _svg_hash(svg_main_code: str) -> str:
+    """Returns a unique hash for the given SVG main code.
+
+    Args:
+        svg_main_code (str): The content we're going to inject in the SVG envelope.
+
+    Returns:
+        str: a hash of the given content
+    """
+    return str(zlib.adler32(svg_main_code.encode()))
+
+
+if __name__ == "__main__":  # pragma: no cover
+    console = Console(record=True)
+
+    console.log(
+        "JSONRPC [i]request[/i]",
+        5,
+        1.3,
+        True,
+        False,
+        None,
+        {
+            "jsonrpc": "2.0",
+            "method": "subtract",
+            "params": {"minuend": 42, "subtrahend": 23},
+            "id": 3,
+        },
+    )
+
+    console.log("Hello, World!", "{'a': 1}", repr(console))
+
+    console.print(
+        {
+            "name": None,
+            "empty": [],
+            "quiz": {
+                "sport": {
+                    "answered": True,
+                    "q1": {
+                        "question": "Which one is correct team name in NBA?",
+                        "options": [
+                            "New York Bulls",
+                            "Los Angeles Kings",
+                            "Golden State Warriors",
+                            "Huston Rocket",
+                        ],
+                        "answer": "Huston Rocket",
+                    },
+                },
+                "maths": {
+                    "answered": False,
+                    "q1": {
+                        "question": "5 + 7 = ?",
+                        "options": [10, 11, 12, 13],
+                        "answer": 12,
+                    },
+                    "q2": {
+                        "question": "12 - 8 = ?",
+                        "options": [1, 2, 3, 4],
+                        "answer": 4,
+                    },
+                },
+            },
+        }
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/constrain.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/constrain.py
new file mode 100644
index 0000000..65fdf56
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/constrain.py
@@ -0,0 +1,37 @@
+from typing import Optional, TYPE_CHECKING
+
+from .jupyter import JupyterMixin
+from .measure import Measurement
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderableType, RenderResult
+
+
+class Constrain(JupyterMixin):
+    """Constrain the width of a renderable to a given number of characters.
+
+    Args:
+        renderable (RenderableType): A renderable object.
+        width (int, optional): The maximum width (in characters) to render. Defaults to 80.
+    """
+
+    def __init__(self, renderable: "RenderableType", width: Optional[int] = 80) -> None:
+        self.renderable = renderable
+        self.width = width
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        if self.width is None:
+            yield self.renderable
+        else:
+            child_options = options.update_width(min(self.width, options.max_width))
+            yield from console.render(self.renderable, child_options)
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        if self.width is not None:
+            options = options.update_width(self.width)
+        measurement = Measurement.get(console, options, self.renderable)
+        return measurement
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/containers.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/containers.py
new file mode 100644
index 0000000..e29cf36
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/containers.py
@@ -0,0 +1,167 @@
+from itertools import zip_longest
+from typing import (
+    Iterator,
+    Iterable,
+    List,
+    Optional,
+    Union,
+    overload,
+    TypeVar,
+    TYPE_CHECKING,
+)
+
+if TYPE_CHECKING:
+    from .console import (
+        Console,
+        ConsoleOptions,
+        JustifyMethod,
+        OverflowMethod,
+        RenderResult,
+        RenderableType,
+    )
+    from .text import Text
+
+from .cells import cell_len
+from .measure import Measurement
+
+T = TypeVar("T")
+
+
+class Renderables:
+    """A list subclass which renders its contents to the console."""
+
+    def __init__(
+        self, renderables: Optional[Iterable["RenderableType"]] = None
+    ) -> None:
+        self._renderables: List["RenderableType"] = (
+            list(renderables) if renderables is not None else []
+        )
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        """Console render method to insert line-breaks."""
+        yield from self._renderables
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        dimensions = [
+            Measurement.get(console, options, renderable)
+            for renderable in self._renderables
+        ]
+        if not dimensions:
+            return Measurement(1, 1)
+        _min = max(dimension.minimum for dimension in dimensions)
+        _max = max(dimension.maximum for dimension in dimensions)
+        return Measurement(_min, _max)
+
+    def append(self, renderable: "RenderableType") -> None:
+        self._renderables.append(renderable)
+
+    def __iter__(self) -> Iterable["RenderableType"]:
+        return iter(self._renderables)
+
+
+class Lines:
+    """A list subclass which can render to the console."""
+
+    def __init__(self, lines: Iterable["Text"] = ()) -> None:
+        self._lines: List["Text"] = list(lines)
+
+    def __repr__(self) -> str:
+        return f"Lines({self._lines!r})"
+
+    def __iter__(self) -> Iterator["Text"]:
+        return iter(self._lines)
+
+    @overload
+    def __getitem__(self, index: int) -> "Text":
+        ...
+
+    @overload
+    def __getitem__(self, index: slice) -> List["Text"]:
+        ...
+
+    def __getitem__(self, index: Union[slice, int]) -> Union["Text", List["Text"]]:
+        return self._lines[index]
+
+    def __setitem__(self, index: int, value: "Text") -> "Lines":
+        self._lines[index] = value
+        return self
+
+    def __len__(self) -> int:
+        return self._lines.__len__()
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        """Console render method to insert line-breaks."""
+        yield from self._lines
+
+    def append(self, line: "Text") -> None:
+        self._lines.append(line)
+
+    def extend(self, lines: Iterable["Text"]) -> None:
+        self._lines.extend(lines)
+
+    def pop(self, index: int = -1) -> "Text":
+        return self._lines.pop(index)
+
+    def justify(
+        self,
+        console: "Console",
+        width: int,
+        justify: "JustifyMethod" = "left",
+        overflow: "OverflowMethod" = "fold",
+    ) -> None:
+        """Justify and overflow text to a given width.
+
+        Args:
+            console (Console): Console instance.
+            width (int): Number of characters per line.
+            justify (str, optional): Default justify method for text: "left", "center", "full" or "right". Defaults to "left".
+            overflow (str, optional): Default overflow for text: "crop", "fold", or "ellipsis". Defaults to "fold".
+
+        """
+        from .text import Text
+
+        if justify == "left":
+            for line in self._lines:
+                line.truncate(width, overflow=overflow, pad=True)
+        elif justify == "center":
+            for line in self._lines:
+                line.rstrip()
+                line.truncate(width, overflow=overflow)
+                line.pad_left((width - cell_len(line.plain)) // 2)
+                line.pad_right(width - cell_len(line.plain))
+        elif justify == "right":
+            for line in self._lines:
+                line.rstrip()
+                line.truncate(width, overflow=overflow)
+                line.pad_left(width - cell_len(line.plain))
+        elif justify == "full":
+            for line_index, line in enumerate(self._lines):
+                if line_index == len(self._lines) - 1:
+                    break
+                words = line.split(" ")
+                words_size = sum(cell_len(word.plain) for word in words)
+                num_spaces = len(words) - 1
+                spaces = [1 for _ in range(num_spaces)]
+                index = 0
+                if spaces:
+                    while words_size + num_spaces < width:
+                        spaces[len(spaces) - index - 1] += 1
+                        num_spaces += 1
+                        index = (index + 1) % len(spaces)
+                tokens: List[Text] = []
+                for index, (word, next_word) in enumerate(
+                    zip_longest(words, words[1:])
+                ):
+                    tokens.append(word)
+                    if index < len(spaces):
+                        style = word.get_style_at_offset(console, -1)
+                        next_style = next_word.get_style_at_offset(console, 0)
+                        space_style = style if style == next_style else line.style
+                        tokens.append(Text(" " * spaces[index], style=space_style))
+                self[line_index] = Text("").join(tokens)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/control.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/control.py
new file mode 100644
index 0000000..88fcb92
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/control.py
@@ -0,0 +1,225 @@
+import sys
+import time
+from typing import TYPE_CHECKING, Callable, Dict, Iterable, List, Union
+
+if sys.version_info >= (3, 8):
+    from typing import Final
+else:
+    from pip._vendor.typing_extensions import Final  # pragma: no cover
+
+from .segment import ControlCode, ControlType, Segment
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderResult
+
+STRIP_CONTROL_CODES: Final = [
+    7,  # Bell
+    8,  # Backspace
+    11,  # Vertical tab
+    12,  # Form feed
+    13,  # Carriage return
+]
+_CONTROL_STRIP_TRANSLATE: Final = {
+    _codepoint: None for _codepoint in STRIP_CONTROL_CODES
+}
+
+CONTROL_ESCAPE: Final = {
+    7: "\\a",
+    8: "\\b",
+    11: "\\v",
+    12: "\\f",
+    13: "\\r",
+}
+
+CONTROL_CODES_FORMAT: Dict[int, Callable[..., str]] = {
+    ControlType.BELL: lambda: "\x07",
+    ControlType.CARRIAGE_RETURN: lambda: "\r",
+    ControlType.HOME: lambda: "\x1b[H",
+    ControlType.CLEAR: lambda: "\x1b[2J",
+    ControlType.ENABLE_ALT_SCREEN: lambda: "\x1b[?1049h",
+    ControlType.DISABLE_ALT_SCREEN: lambda: "\x1b[?1049l",
+    ControlType.SHOW_CURSOR: lambda: "\x1b[?25h",
+    ControlType.HIDE_CURSOR: lambda: "\x1b[?25l",
+    ControlType.CURSOR_UP: lambda param: f"\x1b[{param}A",
+    ControlType.CURSOR_DOWN: lambda param: f"\x1b[{param}B",
+    ControlType.CURSOR_FORWARD: lambda param: f"\x1b[{param}C",
+    ControlType.CURSOR_BACKWARD: lambda param: f"\x1b[{param}D",
+    ControlType.CURSOR_MOVE_TO_COLUMN: lambda param: f"\x1b[{param+1}G",
+    ControlType.ERASE_IN_LINE: lambda param: f"\x1b[{param}K",
+    ControlType.CURSOR_MOVE_TO: lambda x, y: f"\x1b[{y+1};{x+1}H",
+    ControlType.SET_WINDOW_TITLE: lambda title: f"\x1b]0;{title}\x07",
+}
+
+
+class Control:
+    """A renderable that inserts a control code (non printable but may move cursor).
+
+    Args:
+        *codes (str): Positional arguments are either a :class:`~rich.segment.ControlType` enum or a
+            tuple of ControlType and an integer parameter
+    """
+
+    __slots__ = ["segment"]
+
+    def __init__(self, *codes: Union[ControlType, ControlCode]) -> None:
+        control_codes: List[ControlCode] = [
+            (code,) if isinstance(code, ControlType) else code for code in codes
+        ]
+        _format_map = CONTROL_CODES_FORMAT
+        rendered_codes = "".join(
+            _format_map[code](*parameters) for code, *parameters in control_codes
+        )
+        self.segment = Segment(rendered_codes, None, control_codes)
+
+    @classmethod
+    def bell(cls) -> "Control":
+        """Ring the 'bell'."""
+        return cls(ControlType.BELL)
+
+    @classmethod
+    def home(cls) -> "Control":
+        """Move cursor to 'home' position."""
+        return cls(ControlType.HOME)
+
+    @classmethod
+    def move(cls, x: int = 0, y: int = 0) -> "Control":
+        """Move cursor relative to current position.
+
+        Args:
+            x (int): X offset.
+            y (int): Y offset.
+
+        Returns:
+            ~Control: Control object.
+
+        """
+
+        def get_codes() -> Iterable[ControlCode]:
+            control = ControlType
+            if x:
+                yield (
+                    control.CURSOR_FORWARD if x > 0 else control.CURSOR_BACKWARD,
+                    abs(x),
+                )
+            if y:
+                yield (
+                    control.CURSOR_DOWN if y > 0 else control.CURSOR_UP,
+                    abs(y),
+                )
+
+        control = cls(*get_codes())
+        return control
+
+    @classmethod
+    def move_to_column(cls, x: int, y: int = 0) -> "Control":
+        """Move to the given column, optionally add offset to row.
+
+        Returns:
+            x (int): absolute x (column)
+            y (int): optional y offset (row)
+
+        Returns:
+            ~Control: Control object.
+        """
+
+        return (
+            cls(
+                (ControlType.CURSOR_MOVE_TO_COLUMN, x),
+                (
+                    ControlType.CURSOR_DOWN if y > 0 else ControlType.CURSOR_UP,
+                    abs(y),
+                ),
+            )
+            if y
+            else cls((ControlType.CURSOR_MOVE_TO_COLUMN, x))
+        )
+
+    @classmethod
+    def move_to(cls, x: int, y: int) -> "Control":
+        """Move cursor to absolute position.
+
+        Args:
+            x (int): x offset (column)
+            y (int): y offset (row)
+
+        Returns:
+            ~Control: Control object.
+        """
+        return cls((ControlType.CURSOR_MOVE_TO, x, y))
+
+    @classmethod
+    def clear(cls) -> "Control":
+        """Clear the screen."""
+        return cls(ControlType.CLEAR)
+
+    @classmethod
+    def show_cursor(cls, show: bool) -> "Control":
+        """Show or hide the cursor."""
+        return cls(ControlType.SHOW_CURSOR if show else ControlType.HIDE_CURSOR)
+
+    @classmethod
+    def alt_screen(cls, enable: bool) -> "Control":
+        """Enable or disable alt screen."""
+        if enable:
+            return cls(ControlType.ENABLE_ALT_SCREEN, ControlType.HOME)
+        else:
+            return cls(ControlType.DISABLE_ALT_SCREEN)
+
+    @classmethod
+    def title(cls, title: str) -> "Control":
+        """Set the terminal window title
+
+        Args:
+            title (str): The new terminal window title
+        """
+        return cls((ControlType.SET_WINDOW_TITLE, title))
+
+    def __str__(self) -> str:
+        return self.segment.text
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        if self.segment.text:
+            yield self.segment
+
+
+def strip_control_codes(
+    text: str, _translate_table: Dict[int, None] = _CONTROL_STRIP_TRANSLATE
+) -> str:
+    """Remove control codes from text.
+
+    Args:
+        text (str): A string possibly contain control codes.
+
+    Returns:
+        str: String with control codes removed.
+    """
+    return text.translate(_translate_table)
+
+
+def escape_control_codes(
+    text: str,
+    _translate_table: Dict[int, str] = CONTROL_ESCAPE,
+) -> str:
+    """Replace control codes with their "escaped" equivalent in the given text.
+    (e.g. "\b" becomes "\\b")
+
+    Args:
+        text (str): A string possibly containing control codes.
+
+    Returns:
+        str: String with control codes replaced with their escaped version.
+    """
+    return text.translate(_translate_table)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console
+
+    console = Console()
+    console.print("Look at the title of your terminal window ^")
+    # console.print(Control((ControlType.SET_WINDOW_TITLE, "Hello, world!")))
+    for i in range(10):
+        console.set_window_title("🚀 Loading" + "." * i)
+        time.sleep(0.5)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/default_styles.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/default_styles.py
new file mode 100644
index 0000000..46e9ea5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/default_styles.py
@@ -0,0 +1,188 @@
+from typing import Dict
+
+from .style import Style
+
+DEFAULT_STYLES: Dict[str, Style] = {
+    "none": Style.null(),
+    "reset": Style(
+        color="default",
+        bgcolor="default",
+        dim=False,
+        bold=False,
+        italic=False,
+        underline=False,
+        blink=False,
+        blink2=False,
+        reverse=False,
+        conceal=False,
+        strike=False,
+    ),
+    "dim": Style(dim=True),
+    "bright": Style(dim=False),
+    "bold": Style(bold=True),
+    "strong": Style(bold=True),
+    "code": Style(reverse=True, bold=True),
+    "italic": Style(italic=True),
+    "emphasize": Style(italic=True),
+    "underline": Style(underline=True),
+    "blink": Style(blink=True),
+    "blink2": Style(blink2=True),
+    "reverse": Style(reverse=True),
+    "strike": Style(strike=True),
+    "black": Style(color="black"),
+    "red": Style(color="red"),
+    "green": Style(color="green"),
+    "yellow": Style(color="yellow"),
+    "magenta": Style(color="magenta"),
+    "cyan": Style(color="cyan"),
+    "white": Style(color="white"),
+    "inspect.attr": Style(color="yellow", italic=True),
+    "inspect.attr.dunder": Style(color="yellow", italic=True, dim=True),
+    "inspect.callable": Style(bold=True, color="red"),
+    "inspect.async_def": Style(italic=True, color="bright_cyan"),
+    "inspect.def": Style(italic=True, color="bright_cyan"),
+    "inspect.class": Style(italic=True, color="bright_cyan"),
+    "inspect.error": Style(bold=True, color="red"),
+    "inspect.equals": Style(),
+    "inspect.help": Style(color="cyan"),
+    "inspect.doc": Style(dim=True),
+    "inspect.value.border": Style(color="green"),
+    "live.ellipsis": Style(bold=True, color="red"),
+    "layout.tree.row": Style(dim=False, color="red"),
+    "layout.tree.column": Style(dim=False, color="blue"),
+    "logging.keyword": Style(bold=True, color="yellow"),
+    "logging.level.notset": Style(dim=True),
+    "logging.level.debug": Style(color="green"),
+    "logging.level.info": Style(color="blue"),
+    "logging.level.warning": Style(color="red"),
+    "logging.level.error": Style(color="red", bold=True),
+    "logging.level.critical": Style(color="red", bold=True, reverse=True),
+    "log.level": Style.null(),
+    "log.time": Style(color="cyan", dim=True),
+    "log.message": Style.null(),
+    "log.path": Style(dim=True),
+    "repr.ellipsis": Style(color="yellow"),
+    "repr.indent": Style(color="green", dim=True),
+    "repr.error": Style(color="red", bold=True),
+    "repr.str": Style(color="green", italic=False, bold=False),
+    "repr.brace": Style(bold=True),
+    "repr.comma": Style(bold=True),
+    "repr.ipv4": Style(bold=True, color="bright_green"),
+    "repr.ipv6": Style(bold=True, color="bright_green"),
+    "repr.eui48": Style(bold=True, color="bright_green"),
+    "repr.eui64": Style(bold=True, color="bright_green"),
+    "repr.tag_start": Style(bold=True),
+    "repr.tag_name": Style(color="bright_magenta", bold=True),
+    "repr.tag_contents": Style(color="default"),
+    "repr.tag_end": Style(bold=True),
+    "repr.attrib_name": Style(color="yellow", italic=False),
+    "repr.attrib_equal": Style(bold=True),
+    "repr.attrib_value": Style(color="magenta", italic=False),
+    "repr.number": Style(color="cyan", bold=True, italic=False),
+    "repr.number_complex": Style(color="cyan", bold=True, italic=False),  # same
+    "repr.bool_true": Style(color="bright_green", italic=True),
+    "repr.bool_false": Style(color="bright_red", italic=True),
+    "repr.none": Style(color="magenta", italic=True),
+    "repr.url": Style(underline=True, color="bright_blue", italic=False, bold=False),
+    "repr.uuid": Style(color="bright_yellow", bold=False),
+    "repr.call": Style(color="magenta", bold=True),
+    "repr.path": Style(color="magenta"),
+    "repr.filename": Style(color="bright_magenta"),
+    "rule.line": Style(color="bright_green"),
+    "rule.text": Style.null(),
+    "json.brace": Style(bold=True),
+    "json.bool_true": Style(color="bright_green", italic=True),
+    "json.bool_false": Style(color="bright_red", italic=True),
+    "json.null": Style(color="magenta", italic=True),
+    "json.number": Style(color="cyan", bold=True, italic=False),
+    "json.str": Style(color="green", italic=False, bold=False),
+    "json.key": Style(color="blue", bold=True),
+    "prompt": Style.null(),
+    "prompt.choices": Style(color="magenta", bold=True),
+    "prompt.default": Style(color="cyan", bold=True),
+    "prompt.invalid": Style(color="red"),
+    "prompt.invalid.choice": Style(color="red"),
+    "pretty": Style.null(),
+    "scope.border": Style(color="blue"),
+    "scope.key": Style(color="yellow", italic=True),
+    "scope.key.special": Style(color="yellow", italic=True, dim=True),
+    "scope.equals": Style(color="red"),
+    "table.header": Style(bold=True),
+    "table.footer": Style(bold=True),
+    "table.cell": Style.null(),
+    "table.title": Style(italic=True),
+    "table.caption": Style(italic=True, dim=True),
+    "traceback.error": Style(color="red", italic=True),
+    "traceback.border.syntax_error": Style(color="bright_red"),
+    "traceback.border": Style(color="red"),
+    "traceback.text": Style.null(),
+    "traceback.title": Style(color="red", bold=True),
+    "traceback.exc_type": Style(color="bright_red", bold=True),
+    "traceback.exc_value": Style.null(),
+    "traceback.offset": Style(color="bright_red", bold=True),
+    "bar.back": Style(color="grey23"),
+    "bar.complete": Style(color="rgb(249,38,114)"),
+    "bar.finished": Style(color="rgb(114,156,31)"),
+    "bar.pulse": Style(color="rgb(249,38,114)"),
+    "progress.description": Style.null(),
+    "progress.filesize": Style(color="green"),
+    "progress.filesize.total": Style(color="green"),
+    "progress.download": Style(color="green"),
+    "progress.elapsed": Style(color="yellow"),
+    "progress.percentage": Style(color="magenta"),
+    "progress.remaining": Style(color="cyan"),
+    "progress.data.speed": Style(color="red"),
+    "progress.spinner": Style(color="green"),
+    "status.spinner": Style(color="green"),
+    "tree": Style(),
+    "tree.line": Style(),
+    "markdown.paragraph": Style(),
+    "markdown.text": Style(),
+    "markdown.emph": Style(italic=True),
+    "markdown.strong": Style(bold=True),
+    "markdown.code": Style(bgcolor="black", color="bright_white"),
+    "markdown.code_block": Style(dim=True, color="cyan", bgcolor="black"),
+    "markdown.block_quote": Style(color="magenta"),
+    "markdown.list": Style(color="cyan"),
+    "markdown.item": Style(),
+    "markdown.item.bullet": Style(color="yellow", bold=True),
+    "markdown.item.number": Style(color="yellow", bold=True),
+    "markdown.hr": Style(color="yellow"),
+    "markdown.h1.border": Style(),
+    "markdown.h1": Style(bold=True),
+    "markdown.h2": Style(bold=True, underline=True),
+    "markdown.h3": Style(bold=True),
+    "markdown.h4": Style(bold=True, dim=True),
+    "markdown.h5": Style(underline=True),
+    "markdown.h6": Style(italic=True),
+    "markdown.h7": Style(italic=True, dim=True),
+    "markdown.link": Style(color="bright_blue"),
+    "markdown.link_url": Style(color="blue"),
+    "iso8601.date": Style(color="blue"),
+    "iso8601.time": Style(color="magenta"),
+    "iso8601.timezone": Style(color="yellow"),
+}
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import argparse
+    import io
+
+    from pip._vendor.rich.console import Console
+    from pip._vendor.rich.table import Table
+    from pip._vendor.rich.text import Text
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--html", action="store_true", help="Export as HTML table")
+    args = parser.parse_args()
+    html: bool = args.html
+    console = Console(record=True, width=70, file=io.StringIO()) if html else Console()
+
+    table = Table("Name", "Styling")
+
+    for style_name, style in DEFAULT_STYLES.items():
+        table.add_row(Text(style_name, style=style), str(style))
+
+    console.print(table)
+    if html:
+        print(console.export_html(inline_styles=True))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/diagnose.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/diagnose.py
new file mode 100644
index 0000000..ad36183
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/diagnose.py
@@ -0,0 +1,37 @@
+import os
+import platform
+
+from pip._vendor.rich import inspect
+from pip._vendor.rich.console import Console, get_windows_console_features
+from pip._vendor.rich.panel import Panel
+from pip._vendor.rich.pretty import Pretty
+
+
+def report() -> None:  # pragma: no cover
+    """Print a report to the terminal with debugging information"""
+    console = Console()
+    inspect(console)
+    features = get_windows_console_features()
+    inspect(features)
+
+    env_names = (
+        "TERM",
+        "COLORTERM",
+        "CLICOLOR",
+        "NO_COLOR",
+        "TERM_PROGRAM",
+        "COLUMNS",
+        "LINES",
+        "JUPYTER_COLUMNS",
+        "JUPYTER_LINES",
+        "JPY_PARENT_PID",
+        "VSCODE_VERBOSE_LOGGING",
+    )
+    env = {name: os.getenv(name) for name in env_names}
+    console.print(Panel.fit((Pretty(env)), title="[b]Environment Variables"))
+
+    console.print(f'platform="{platform.system()}"')
+
+
+if __name__ == "__main__":  # pragma: no cover
+    report()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/emoji.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/emoji.py
new file mode 100644
index 0000000..791f046
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/emoji.py
@@ -0,0 +1,96 @@
+import sys
+from typing import TYPE_CHECKING, Optional, Union
+
+from .jupyter import JupyterMixin
+from .segment import Segment
+from .style import Style
+from ._emoji_codes import EMOJI
+from ._emoji_replace import _emoji_replace
+
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderResult
+
+
+EmojiVariant = Literal["emoji", "text"]
+
+
+class NoEmoji(Exception):
+    """No emoji by that name."""
+
+
+class Emoji(JupyterMixin):
+    __slots__ = ["name", "style", "_char", "variant"]
+
+    VARIANTS = {"text": "\uFE0E", "emoji": "\uFE0F"}
+
+    def __init__(
+        self,
+        name: str,
+        style: Union[str, Style] = "none",
+        variant: Optional[EmojiVariant] = None,
+    ) -> None:
+        """A single emoji character.
+
+        Args:
+            name (str): Name of emoji.
+            style (Union[str, Style], optional): Optional style. Defaults to None.
+
+        Raises:
+            NoEmoji: If the emoji doesn't exist.
+        """
+        self.name = name
+        self.style = style
+        self.variant = variant
+        try:
+            self._char = EMOJI[name]
+        except KeyError:
+            raise NoEmoji(f"No emoji called {name!r}")
+        if variant is not None:
+            self._char += self.VARIANTS.get(variant, "")
+
+    @classmethod
+    def replace(cls, text: str) -> str:
+        """Replace emoji markup with corresponding unicode characters.
+
+        Args:
+            text (str): A string with emojis codes, e.g. "Hello :smiley:!"
+
+        Returns:
+            str: A string with emoji codes replaces with actual emoji.
+        """
+        return _emoji_replace(text)
+
+    def __repr__(self) -> str:
+        return f"<emoji {self.name!r}>"
+
+    def __str__(self) -> str:
+        return self._char
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        yield Segment(self._char, console.get_style(self.style))
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sys
+
+    from pip._vendor.rich.columns import Columns
+    from pip._vendor.rich.console import Console
+
+    console = Console(record=True)
+
+    columns = Columns(
+        (f":{name}: {name}" for name in sorted(EMOJI.keys()) if "\u200D" not in name),
+        column_first=True,
+    )
+
+    console.print(columns)
+    if len(sys.argv) > 1:
+        console.save_html(sys.argv[1])
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/errors.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/errors.py
new file mode 100644
index 0000000..0bcbe53
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/errors.py
@@ -0,0 +1,34 @@
+class ConsoleError(Exception):
+    """An error in console operation."""
+
+
+class StyleError(Exception):
+    """An error in styles."""
+
+
+class StyleSyntaxError(ConsoleError):
+    """Style was badly formatted."""
+
+
+class MissingStyle(StyleError):
+    """No such style."""
+
+
+class StyleStackError(ConsoleError):
+    """Style stack is invalid."""
+
+
+class NotRenderableError(ConsoleError):
+    """Object is not renderable."""
+
+
+class MarkupError(ConsoleError):
+    """Markup was badly formatted."""
+
+
+class LiveError(ConsoleError):
+    """Error related to Live display."""
+
+
+class NoAltScreen(ConsoleError):
+    """Alt screen mode was required."""
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/file_proxy.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/file_proxy.py
new file mode 100644
index 0000000..cc69f22
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/file_proxy.py
@@ -0,0 +1,54 @@
+import io
+from typing import IO, TYPE_CHECKING, Any, List
+
+from .ansi import AnsiDecoder
+from .text import Text
+
+if TYPE_CHECKING:
+    from .console import Console
+
+
+class FileProxy(io.TextIOBase):
+    """Wraps a file (e.g. sys.stdout) and redirects writes to a console."""
+
+    def __init__(self, console: "Console", file: IO[str]) -> None:
+        self.__console = console
+        self.__file = file
+        self.__buffer: List[str] = []
+        self.__ansi_decoder = AnsiDecoder()
+
+    @property
+    def rich_proxied_file(self) -> IO[str]:
+        """Get proxied file."""
+        return self.__file
+
+    def __getattr__(self, name: str) -> Any:
+        return getattr(self.__file, name)
+
+    def write(self, text: str) -> int:
+        if not isinstance(text, str):
+            raise TypeError(f"write() argument must be str, not {type(text).__name__}")
+        buffer = self.__buffer
+        lines: List[str] = []
+        while text:
+            line, new_line, text = text.partition("\n")
+            if new_line:
+                lines.append("".join(buffer) + line)
+                del buffer[:]
+            else:
+                buffer.append(line)
+                break
+        if lines:
+            console = self.__console
+            with console:
+                output = Text("\n").join(
+                    self.__ansi_decoder.decode_line(line) for line in lines
+                )
+                console.print(output)
+        return len(text)
+
+    def flush(self) -> None:
+        output = "".join(self.__buffer)
+        if output:
+            self.__console.print(output)
+        del self.__buffer[:]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/filesize.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/filesize.py
new file mode 100644
index 0000000..61be475
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/filesize.py
@@ -0,0 +1,89 @@
+# coding: utf-8
+"""Functions for reporting filesizes. Borrowed from https://github.com/PyFilesystem/pyfilesystem2
+
+The functions declared in this module should cover the different
+usecases needed to generate a string representation of a file size
+using several different units. Since there are many standards regarding
+file size units, three different functions have been implemented.
+
+See Also:
+    * `Wikipedia: Binary prefix <https://en.wikipedia.org/wiki/Binary_prefix>`_
+
+"""
+
+__all__ = ["decimal"]
+
+from typing import Iterable, List, Optional, Tuple
+
+
+def _to_str(
+    size: int,
+    suffixes: Iterable[str],
+    base: int,
+    *,
+    precision: Optional[int] = 1,
+    separator: Optional[str] = " ",
+) -> str:
+    if size == 1:
+        return "1 byte"
+    elif size < base:
+        return "{:,} bytes".format(size)
+
+    for i, suffix in enumerate(suffixes, 2):  # noqa: B007
+        unit = base**i
+        if size < unit:
+            break
+    return "{:,.{precision}f}{separator}{}".format(
+        (base * size / unit),
+        suffix,
+        precision=precision,
+        separator=separator,
+    )
+
+
+def pick_unit_and_suffix(size: int, suffixes: List[str], base: int) -> Tuple[int, str]:
+    """Pick a suffix and base for the given size."""
+    for i, suffix in enumerate(suffixes):
+        unit = base**i
+        if size < unit * base:
+            break
+    return unit, suffix
+
+
+def decimal(
+    size: int,
+    *,
+    precision: Optional[int] = 1,
+    separator: Optional[str] = " ",
+) -> str:
+    """Convert a filesize in to a string (powers of 1000, SI prefixes).
+
+    In this convention, ``1000 B = 1 kB``.
+
+    This is typically the format used to advertise the storage
+    capacity of USB flash drives and the like (*256 MB* meaning
+    actually a storage capacity of more than *256 000 000 B*),
+    or used by **Mac OS X** since v10.6 to report file sizes.
+
+    Arguments:
+        int (size): A file size.
+        int (precision): The number of decimal places to include (default = 1).
+        str (separator): The string to separate the value from the units (default = " ").
+
+    Returns:
+        `str`: A string containing a abbreviated file size and units.
+
+    Example:
+        >>> filesize.decimal(30000)
+        '30.0 kB'
+        >>> filesize.decimal(30000, precision=2, separator="")
+        '30.00kB'
+
+    """
+    return _to_str(
+        size,
+        ("kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"),
+        1000,
+        precision=precision,
+        separator=separator,
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/highlighter.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/highlighter.py
new file mode 100644
index 0000000..82293df
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/highlighter.py
@@ -0,0 +1,232 @@
+import re
+from abc import ABC, abstractmethod
+from typing import List, Union
+
+from .text import Span, Text
+
+
+def _combine_regex(*regexes: str) -> str:
+    """Combine a number of regexes in to a single regex.
+
+    Returns:
+        str: New regex with all regexes ORed together.
+    """
+    return "|".join(regexes)
+
+
+class Highlighter(ABC):
+    """Abstract base class for highlighters."""
+
+    def __call__(self, text: Union[str, Text]) -> Text:
+        """Highlight a str or Text instance.
+
+        Args:
+            text (Union[str, ~Text]): Text to highlight.
+
+        Raises:
+            TypeError: If not called with text or str.
+
+        Returns:
+            Text: A test instance with highlighting applied.
+        """
+        if isinstance(text, str):
+            highlight_text = Text(text)
+        elif isinstance(text, Text):
+            highlight_text = text.copy()
+        else:
+            raise TypeError(f"str or Text instance required, not {text!r}")
+        self.highlight(highlight_text)
+        return highlight_text
+
+    @abstractmethod
+    def highlight(self, text: Text) -> None:
+        """Apply highlighting in place to text.
+
+        Args:
+            text (~Text): A text object highlight.
+        """
+
+
+class NullHighlighter(Highlighter):
+    """A highlighter object that doesn't highlight.
+
+    May be used to disable highlighting entirely.
+
+    """
+
+    def highlight(self, text: Text) -> None:
+        """Nothing to do"""
+
+
+class RegexHighlighter(Highlighter):
+    """Applies highlighting from a list of regular expressions."""
+
+    highlights: List[str] = []
+    base_style: str = ""
+
+    def highlight(self, text: Text) -> None:
+        """Highlight :class:`rich.text.Text` using regular expressions.
+
+        Args:
+            text (~Text): Text to highlighted.
+
+        """
+
+        highlight_regex = text.highlight_regex
+        for re_highlight in self.highlights:
+            highlight_regex(re_highlight, style_prefix=self.base_style)
+
+
+class ReprHighlighter(RegexHighlighter):
+    """Highlights the text typically produced from ``__repr__`` methods."""
+
+    base_style = "repr."
+    highlights = [
+        r"(?P<tag_start><)(?P<tag_name>[-\w.:|]*)(?P<tag_contents>[\w\W]*?)(?P<tag_end>>)",
+        r'(?P<attrib_name>[\w_]{1,50})=(?P<attrib_value>"?[\w_]+"?)?',
+        r"(?P<brace>[][{}()])",
+        _combine_regex(
+            r"(?P<ipv4>[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})",
+            r"(?P<ipv6>([A-Fa-f0-9]{1,4}::?){1,7}[A-Fa-f0-9]{1,4})",
+            r"(?P<eui64>(?:[0-9A-Fa-f]{1,2}-){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){7}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){3}[0-9A-Fa-f]{4})",
+            r"(?P<eui48>(?:[0-9A-Fa-f]{1,2}-){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{1,2}:){5}[0-9A-Fa-f]{1,2}|(?:[0-9A-Fa-f]{4}\.){2}[0-9A-Fa-f]{4})",
+            r"(?P<uuid>[a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12})",
+            r"(?P<call>[\w.]*?)\(",
+            r"\b(?P<bool_true>True)\b|\b(?P<bool_false>False)\b|\b(?P<none>None)\b",
+            r"(?P<ellipsis>\.\.\.)",
+            r"(?P<number_complex>(?<!\w)(?:\-?[0-9]+\.?[0-9]*(?:e[-+]?\d+?)?)(?:[-+](?:[0-9]+\.?[0-9]*(?:e[-+]?\d+)?))?j)",
+            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[-+]?\d+?)?\b|0x[0-9a-fA-F]*)",
+            r"(?P<path>\B(/[-\w._+]+)*\/)(?P<filename>[-\w._+]*)?",
+            r"(?<![\\\w])(?P<str>b?'''.*?(?<!\\)'''|b?'.*?(?<!\\)'|b?\"\"\".*?(?<!\\)\"\"\"|b?\".*?(?<!\\)\")",
+            r"(?P<url>(file|https|http|ws|wss)://[-0-9a-zA-Z$_+!`(),.?/;:&=%#]*)",
+        ),
+    ]
+
+
+class JSONHighlighter(RegexHighlighter):
+    """Highlights JSON"""
+
+    # Captures the start and end of JSON strings, handling escaped quotes
+    JSON_STR = r"(?<![\\\w])(?P<str>b?\".*?(?<!\\)\")"
+    JSON_WHITESPACE = {" ", "\n", "\r", "\t"}
+
+    base_style = "json."
+    highlights = [
+        _combine_regex(
+            r"(?P<brace>[\{\[\(\)\]\}])",
+            r"\b(?P<bool_true>true)\b|\b(?P<bool_false>false)\b|\b(?P<null>null)\b",
+            r"(?P<number>(?<!\w)\-?[0-9]+\.?[0-9]*(e[\-\+]?\d+?)?\b|0x[0-9a-fA-F]*)",
+            JSON_STR,
+        ),
+    ]
+
+    def highlight(self, text: Text) -> None:
+        super().highlight(text)
+
+        # Additional work to handle highlighting JSON keys
+        plain = text.plain
+        append = text.spans.append
+        whitespace = self.JSON_WHITESPACE
+        for match in re.finditer(self.JSON_STR, plain):
+            start, end = match.span()
+            cursor = end
+            while cursor < len(plain):
+                char = plain[cursor]
+                cursor += 1
+                if char == ":":
+                    append(Span(start, end, "json.key"))
+                elif char in whitespace:
+                    continue
+                break
+
+
+class ISO8601Highlighter(RegexHighlighter):
+    """Highlights the ISO8601 date time strings.
+    Regex reference: https://www.oreilly.com/library/view/regular-expressions-cookbook/9781449327453/ch04s07.html
+    """
+
+    base_style = "iso8601."
+    highlights = [
+        #
+        # Dates
+        #
+        # Calendar month (e.g. 2008-08). The hyphen is required
+        r"^(?P<year>[0-9]{4})-(?P<month>1[0-2]|0[1-9])$",
+        # Calendar date w/o hyphens (e.g. 20080830)
+        r"^(?P<date>(?P<year>[0-9]{4})(?P<month>1[0-2]|0[1-9])(?P<day>3[01]|0[1-9]|[12][0-9]))$",
+        # Ordinal date (e.g. 2008-243). The hyphen is optional
+        r"^(?P<date>(?P<year>[0-9]{4})-?(?P<day>36[0-6]|3[0-5][0-9]|[12][0-9]{2}|0[1-9][0-9]|00[1-9]))$",
+        #
+        # Weeks
+        #
+        # Week of the year (e.g., 2008-W35). The hyphen is optional
+        r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9]))$",
+        # Week date (e.g., 2008-W35-6). The hyphens are optional
+        r"^(?P<date>(?P<year>[0-9]{4})-?W(?P<week>5[0-3]|[1-4][0-9]|0[1-9])-?(?P<day>[1-7]))$",
+        #
+        # Times
+        #
+        # Hours and minutes (e.g., 17:21). The colon is optional
+        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):?(?P<minute>[0-5][0-9]))$",
+        # Hours, minutes, and seconds w/o colons (e.g., 172159)
+        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))$",
+        # Time zone designator (e.g., Z, +07 or +07:00). The colons and the minutes are optional
+        r"^(?P<timezone>(Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?))$",
+        # Hours, minutes, and seconds with time zone designator (e.g., 17:21:59+07:00).
+        # All the colons are optional. The minutes in the time zone designator are also optional
+        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9])(?P<minute>[0-5][0-9])(?P<second>[0-5][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9])(?::?(?:[0-5][0-9]))?)$",
+        #
+        # Date and Time
+        #
+        # Calendar date with hours, minutes, and seconds (e.g., 2008-08-30 17:21:59 or 20080830 172159).
+        # A space is required between the date and the time. The hyphens and colons are optional.
+        # This regex matches dates and times that specify some hyphens or colons but omit others.
+        # This does not follow ISO 8601
+        r"^(?P<date>(?P<year>[0-9]{4})(?P<hyphen>-)?(?P<month>1[0-2]|0[1-9])(?(hyphen)-)(?P<day>3[01]|0[1-9]|[12][0-9])) (?P<time>(?P<hour>2[0-3]|[01][0-9])(?(hyphen):)(?P<minute>[0-5][0-9])(?(hyphen):)(?P<second>[0-5][0-9]))$",
+        #
+        # XML Schema dates and times
+        #
+        # Date, with optional time zone (e.g., 2008-08-30 or 2008-08-30+07:00).
+        # Hyphens are required. This is the XML Schema 'date' type
+        r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
+        # Time, with optional fractional seconds and time zone (e.g., 01:45:36 or 01:45:36.123+07:00).
+        # There is no limit on the number of digits for the fractional seconds. This is the XML Schema 'time' type
+        r"^(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<frac>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
+        # Date and time, with optional fractional seconds and time zone (e.g., 2008-08-30T01:45:36 or 2008-08-30T01:45:36.123Z).
+        # This is the XML Schema 'dateTime' type
+        r"^(?P<date>(?P<year>-?(?:[1-9][0-9]*)?[0-9]{4})-(?P<month>1[0-2]|0[1-9])-(?P<day>3[01]|0[1-9]|[12][0-9]))T(?P<time>(?P<hour>2[0-3]|[01][0-9]):(?P<minute>[0-5][0-9]):(?P<second>[0-5][0-9])(?P<ms>\.[0-9]+)?)(?P<timezone>Z|[+-](?:2[0-3]|[01][0-9]):[0-5][0-9])?$",
+    ]
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from .console import Console
+
+    console = Console()
+    console.print("[bold green]hello world![/bold green]")
+    console.print("'[bold green]hello world![/bold green]'")
+
+    console.print(" /foo")
+    console.print("/foo/")
+    console.print("/foo/bar")
+    console.print("foo/bar/baz")
+
+    console.print("/foo/bar/baz?foo=bar+egg&egg=baz")
+    console.print("/foo/bar/baz/")
+    console.print("/foo/bar/baz/egg")
+    console.print("/foo/bar/baz/egg.py")
+    console.print("/foo/bar/baz/egg.py word")
+    console.print(" /foo/bar/baz/egg.py word")
+    console.print("foo /foo/bar/baz/egg.py word")
+    console.print("foo /foo/bar/ba._++z/egg+.py word")
+    console.print("https://example.org?foo=bar#header")
+
+    console.print(1234567.34)
+    console.print(1 / 2)
+    console.print(-1 / 123123123123)
+
+    console.print(
+        "127.0.1.1 bar 192.168.1.4 2001:0db8:85a3:0000:0000:8a2e:0370:7334 foo"
+    )
+    import json
+
+    console.print_json(json.dumps(obj={"name": "apple", "count": 1}), indent=None)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/json.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/json.py
new file mode 100644
index 0000000..2358387
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/json.py
@@ -0,0 +1,140 @@
+from json import loads, dumps
+from typing import Any, Callable, Optional, Union
+
+from .text import Text
+from .highlighter import JSONHighlighter, NullHighlighter
+
+
+class JSON:
+    """A renderable which pretty prints JSON.
+
+    Args:
+        json (str): JSON encoded data.
+        indent (Union[None, int, str], optional): Number of characters to indent by. Defaults to 2.
+        highlight (bool, optional): Enable highlighting. Defaults to True.
+        skip_keys (bool, optional): Skip keys not of a basic type. Defaults to False.
+        ensure_ascii (bool, optional): Escape all non-ascii characters. Defaults to False.
+        check_circular (bool, optional): Check for circular references. Defaults to True.
+        allow_nan (bool, optional): Allow NaN and Infinity values. Defaults to True.
+        default (Callable, optional): A callable that converts values that can not be encoded
+            in to something that can be JSON encoded. Defaults to None.
+        sort_keys (bool, optional): Sort dictionary keys. Defaults to False.
+    """
+
+    def __init__(
+        self,
+        json: str,
+        indent: Union[None, int, str] = 2,
+        highlight: bool = True,
+        skip_keys: bool = False,
+        ensure_ascii: bool = True,
+        check_circular: bool = True,
+        allow_nan: bool = True,
+        default: Optional[Callable[[Any], Any]] = None,
+        sort_keys: bool = False,
+    ) -> None:
+        data = loads(json)
+        json = dumps(
+            data,
+            indent=indent,
+            skipkeys=skip_keys,
+            ensure_ascii=ensure_ascii,
+            check_circular=check_circular,
+            allow_nan=allow_nan,
+            default=default,
+            sort_keys=sort_keys,
+        )
+        highlighter = JSONHighlighter() if highlight else NullHighlighter()
+        self.text = highlighter(json)
+        self.text.no_wrap = True
+        self.text.overflow = None
+
+    @classmethod
+    def from_data(
+        cls,
+        data: Any,
+        indent: Union[None, int, str] = 2,
+        highlight: bool = True,
+        skip_keys: bool = False,
+        ensure_ascii: bool = True,
+        check_circular: bool = True,
+        allow_nan: bool = True,
+        default: Optional[Callable[[Any], Any]] = None,
+        sort_keys: bool = False,
+    ) -> "JSON":
+        """Encodes a JSON object from arbitrary data.
+
+        Args:
+            data (Any): An object that may be encoded in to JSON
+            indent (Union[None, int, str], optional): Number of characters to indent by. Defaults to 2.
+            highlight (bool, optional): Enable highlighting. Defaults to True.
+            default (Callable, optional): Optional callable which will be called for objects that cannot be serialized. Defaults to None.
+            skip_keys (bool, optional): Skip keys not of a basic type. Defaults to False.
+            ensure_ascii (bool, optional): Escape all non-ascii characters. Defaults to False.
+            check_circular (bool, optional): Check for circular references. Defaults to True.
+            allow_nan (bool, optional): Allow NaN and Infinity values. Defaults to True.
+            default (Callable, optional): A callable that converts values that can not be encoded
+                in to something that can be JSON encoded. Defaults to None.
+            sort_keys (bool, optional): Sort dictionary keys. Defaults to False.
+
+        Returns:
+            JSON: New JSON object from the given data.
+        """
+        json_instance: "JSON" = cls.__new__(cls)
+        json = dumps(
+            data,
+            indent=indent,
+            skipkeys=skip_keys,
+            ensure_ascii=ensure_ascii,
+            check_circular=check_circular,
+            allow_nan=allow_nan,
+            default=default,
+            sort_keys=sort_keys,
+        )
+        highlighter = JSONHighlighter() if highlight else NullHighlighter()
+        json_instance.text = highlighter(json)
+        json_instance.text.no_wrap = True
+        json_instance.text.overflow = None
+        return json_instance
+
+    def __rich__(self) -> Text:
+        return self.text
+
+
+if __name__ == "__main__":
+
+    import argparse
+    import sys
+
+    parser = argparse.ArgumentParser(description="Pretty print json")
+    parser.add_argument(
+        "path",
+        metavar="PATH",
+        help="path to file, or - for stdin",
+    )
+    parser.add_argument(
+        "-i",
+        "--indent",
+        metavar="SPACES",
+        type=int,
+        help="Number of spaces in an indent",
+        default=2,
+    )
+    args = parser.parse_args()
+
+    from pip._vendor.rich.console import Console
+
+    console = Console()
+    error_console = Console(stderr=True)
+
+    try:
+        if args.path == "-":
+            json_data = sys.stdin.read()
+        else:
+            with open(args.path, "rt") as json_file:
+                json_data = json_file.read()
+    except Exception as error:
+        error_console.print(f"Unable to read {args.path!r}; {error}")
+        sys.exit(-1)
+
+    console.print(JSON(json_data, indent=args.indent), soft_wrap=True)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/jupyter.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/jupyter.py
new file mode 100644
index 0000000..22f4d71
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/jupyter.py
@@ -0,0 +1,101 @@
+from typing import TYPE_CHECKING, Any, Dict, Iterable, List, Sequence
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.console import ConsoleRenderable
+
+from . import get_console
+from .segment import Segment
+from .terminal_theme import DEFAULT_TERMINAL_THEME
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.console import ConsoleRenderable
+
+JUPYTER_HTML_FORMAT = """\
+<pre style="white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace">{code}</pre>
+"""
+
+
+class JupyterRenderable:
+    """A shim to write html to Jupyter notebook."""
+
+    def __init__(self, html: str, text: str) -> None:
+        self.html = html
+        self.text = text
+
+    def _repr_mimebundle_(
+        self, include: Sequence[str], exclude: Sequence[str], **kwargs: Any
+    ) -> Dict[str, str]:
+        data = {"text/plain": self.text, "text/html": self.html}
+        if include:
+            data = {k: v for (k, v) in data.items() if k in include}
+        if exclude:
+            data = {k: v for (k, v) in data.items() if k not in exclude}
+        return data
+
+
+class JupyterMixin:
+    """Add to an Rich renderable to make it render in Jupyter notebook."""
+
+    __slots__ = ()
+
+    def _repr_mimebundle_(
+        self: "ConsoleRenderable",
+        include: Sequence[str],
+        exclude: Sequence[str],
+        **kwargs: Any,
+    ) -> Dict[str, str]:
+        console = get_console()
+        segments = list(console.render(self, console.options))
+        html = _render_segments(segments)
+        text = console._render_buffer(segments)
+        data = {"text/plain": text, "text/html": html}
+        if include:
+            data = {k: v for (k, v) in data.items() if k in include}
+        if exclude:
+            data = {k: v for (k, v) in data.items() if k not in exclude}
+        return data
+
+
+def _render_segments(segments: Iterable[Segment]) -> str:
+    def escape(text: str) -> str:
+        """Escape html."""
+        return text.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
+
+    fragments: List[str] = []
+    append_fragment = fragments.append
+    theme = DEFAULT_TERMINAL_THEME
+    for text, style, control in Segment.simplify(segments):
+        if control:
+            continue
+        text = escape(text)
+        if style:
+            rule = style.get_html_style(theme)
+            text = f'<span style="{rule}">{text}</span>' if rule else text
+            if style.link:
+                text = f'<a href="{style.link}" target="_blank">{text}</a>'
+        append_fragment(text)
+
+    code = "".join(fragments)
+    html = JUPYTER_HTML_FORMAT.format(code=code)
+
+    return html
+
+
+def display(segments: Iterable[Segment], text: str) -> None:
+    """Render segments to Jupyter."""
+    html = _render_segments(segments)
+    jupyter_renderable = JupyterRenderable(html, text)
+    try:
+        from IPython.display import display as ipython_display
+
+        ipython_display(jupyter_renderable)
+    except ModuleNotFoundError:
+        # Handle the case where the Console has force_jupyter=True,
+        # but IPython is not installed.
+        pass
+
+
+def print(*args: Any, **kwargs: Any) -> None:
+    """Proxy for Console print."""
+    console = get_console()
+    return console.print(*args, **kwargs)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/layout.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/layout.py
new file mode 100644
index 0000000..1d70465
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/layout.py
@@ -0,0 +1,445 @@
+from abc import ABC, abstractmethod
+from itertools import islice
+from operator import itemgetter
+from threading import RLock
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)
+
+from ._ratio import ratio_resolve
+from .align import Align
+from .console import Console, ConsoleOptions, RenderableType, RenderResult
+from .highlighter import ReprHighlighter
+from .panel import Panel
+from .pretty import Pretty
+from .repr import rich_repr, Result
+from .region import Region
+from .segment import Segment
+from .style import StyleType
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.tree import Tree
+
+
+class LayoutRender(NamedTuple):
+    """An individual layout render."""
+
+    region: Region
+    render: List[List[Segment]]
+
+
+RegionMap = Dict["Layout", Region]
+RenderMap = Dict["Layout", LayoutRender]
+
+
+class LayoutError(Exception):
+    """Layout related error."""
+
+
+class NoSplitter(LayoutError):
+    """Requested splitter does not exist."""
+
+
+class _Placeholder:
+    """An internal renderable used as a Layout placeholder."""
+
+    highlighter = ReprHighlighter()
+
+    def __init__(self, layout: "Layout", style: StyleType = "") -> None:
+        self.layout = layout
+        self.style = style
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        width = options.max_width
+        height = options.height or options.size.height
+        layout = self.layout
+        title = (
+            f"{layout.name!r} ({width} x {height})"
+            if layout.name
+            else f"({width} x {height})"
+        )
+        yield Panel(
+            Align.center(Pretty(layout), vertical="middle"),
+            style=self.style,
+            title=self.highlighter(title),
+            border_style="blue",
+            height=height,
+        )
+
+
+class Splitter(ABC):
+    """Base class for a splitter."""
+
+    name: str = ""
+
+    @abstractmethod
+    def get_tree_icon(self) -> str:
+        """Get the icon (emoji) used in layout.tree"""
+
+    @abstractmethod
+    def divide(
+        self, children: Sequence["Layout"], region: Region
+    ) -> Iterable[Tuple["Layout", Region]]:
+        """Divide a region amongst several child layouts.
+
+        Args:
+            children (Sequence(Layout)): A number of child layouts.
+            region (Region): A rectangular region to divide.
+        """
+
+
+class RowSplitter(Splitter):
+    """Split a layout region in to rows."""
+
+    name = "row"
+
+    def get_tree_icon(self) -> str:
+        return "[layout.tree.row]⬌"
+
+    def divide(
+        self, children: Sequence["Layout"], region: Region
+    ) -> Iterable[Tuple["Layout", Region]]:
+        x, y, width, height = region
+        render_widths = ratio_resolve(width, children)
+        offset = 0
+        _Region = Region
+        for child, child_width in zip(children, render_widths):
+            yield child, _Region(x + offset, y, child_width, height)
+            offset += child_width
+
+
+class ColumnSplitter(Splitter):
+    """Split a layout region in to columns."""
+
+    name = "column"
+
+    def get_tree_icon(self) -> str:
+        return "[layout.tree.column]⬍"
+
+    def divide(
+        self, children: Sequence["Layout"], region: Region
+    ) -> Iterable[Tuple["Layout", Region]]:
+        x, y, width, height = region
+        render_heights = ratio_resolve(height, children)
+        offset = 0
+        _Region = Region
+        for child, child_height in zip(children, render_heights):
+            yield child, _Region(x, y + offset, width, child_height)
+            offset += child_height
+
+
+@rich_repr
+class Layout:
+    """A renderable to divide a fixed height in to rows or columns.
+
+    Args:
+        renderable (RenderableType, optional): Renderable content, or None for placeholder. Defaults to None.
+        name (str, optional): Optional identifier for Layout. Defaults to None.
+        size (int, optional): Optional fixed size of layout. Defaults to None.
+        minimum_size (int, optional): Minimum size of layout. Defaults to 1.
+        ratio (int, optional): Optional ratio for flexible layout. Defaults to 1.
+        visible (bool, optional): Visibility of layout. Defaults to True.
+    """
+
+    splitters = {"row": RowSplitter, "column": ColumnSplitter}
+
+    def __init__(
+        self,
+        renderable: Optional[RenderableType] = None,
+        *,
+        name: Optional[str] = None,
+        size: Optional[int] = None,
+        minimum_size: int = 1,
+        ratio: int = 1,
+        visible: bool = True,
+        height: Optional[int] = None,
+    ) -> None:
+        self._renderable = renderable or _Placeholder(self)
+        self.size = size
+        self.minimum_size = minimum_size
+        self.ratio = ratio
+        self.name = name
+        self.visible = visible
+        self.height = height
+        self.splitter: Splitter = self.splitters["column"]()
+        self._children: List[Layout] = []
+        self._render_map: RenderMap = {}
+        self._lock = RLock()
+
+    def __rich_repr__(self) -> Result:
+        yield "name", self.name, None
+        yield "size", self.size, None
+        yield "minimum_size", self.minimum_size, 1
+        yield "ratio", self.ratio, 1
+
+    @property
+    def renderable(self) -> RenderableType:
+        """Layout renderable."""
+        return self if self._children else self._renderable
+
+    @property
+    def children(self) -> List["Layout"]:
+        """Gets (visible) layout children."""
+        return [child for child in self._children if child.visible]
+
+    @property
+    def map(self) -> RenderMap:
+        """Get a map of the last render."""
+        return self._render_map
+
+    def get(self, name: str) -> Optional["Layout"]:
+        """Get a named layout, or None if it doesn't exist.
+
+        Args:
+            name (str): Name of layout.
+
+        Returns:
+            Optional[Layout]: Layout instance or None if no layout was found.
+        """
+        if self.name == name:
+            return self
+        else:
+            for child in self._children:
+                named_layout = child.get(name)
+                if named_layout is not None:
+                    return named_layout
+        return None
+
+    def __getitem__(self, name: str) -> "Layout":
+        layout = self.get(name)
+        if layout is None:
+            raise KeyError(f"No layout with name {name!r}")
+        return layout
+
+    @property
+    def tree(self) -> "Tree":
+        """Get a tree renderable to show layout structure."""
+        from pip._vendor.rich.styled import Styled
+        from pip._vendor.rich.table import Table
+        from pip._vendor.rich.tree import Tree
+
+        def summary(layout: "Layout") -> Table:
+
+            icon = layout.splitter.get_tree_icon()
+
+            table = Table.grid(padding=(0, 1, 0, 0))
+
+            text: RenderableType = (
+                Pretty(layout) if layout.visible else Styled(Pretty(layout), "dim")
+            )
+            table.add_row(icon, text)
+            _summary = table
+            return _summary
+
+        layout = self
+        tree = Tree(
+            summary(layout),
+            guide_style=f"layout.tree.{layout.splitter.name}",
+            highlight=True,
+        )
+
+        def recurse(tree: "Tree", layout: "Layout") -> None:
+            for child in layout._children:
+                recurse(
+                    tree.add(
+                        summary(child),
+                        guide_style=f"layout.tree.{child.splitter.name}",
+                    ),
+                    child,
+                )
+
+        recurse(tree, self)
+        return tree
+
+    def split(
+        self,
+        *layouts: Union["Layout", RenderableType],
+        splitter: Union[Splitter, str] = "column",
+    ) -> None:
+        """Split the layout in to multiple sub-layouts.
+
+        Args:
+            *layouts (Layout): Positional arguments should be (sub) Layout instances.
+            splitter (Union[Splitter, str]): Splitter instance or name of splitter.
+        """
+        _layouts = [
+            layout if isinstance(layout, Layout) else Layout(layout)
+            for layout in layouts
+        ]
+        try:
+            self.splitter = (
+                splitter
+                if isinstance(splitter, Splitter)
+                else self.splitters[splitter]()
+            )
+        except KeyError:
+            raise NoSplitter(f"No splitter called {splitter!r}")
+        self._children[:] = _layouts
+
+    def add_split(self, *layouts: Union["Layout", RenderableType]) -> None:
+        """Add a new layout(s) to existing split.
+
+        Args:
+            *layouts (Union[Layout, RenderableType]): Positional arguments should be renderables or (sub) Layout instances.
+
+        """
+        _layouts = (
+            layout if isinstance(layout, Layout) else Layout(layout)
+            for layout in layouts
+        )
+        self._children.extend(_layouts)
+
+    def split_row(self, *layouts: Union["Layout", RenderableType]) -> None:
+        """Split the layout in to a row (layouts side by side).
+
+        Args:
+            *layouts (Layout): Positional arguments should be (sub) Layout instances.
+        """
+        self.split(*layouts, splitter="row")
+
+    def split_column(self, *layouts: Union["Layout", RenderableType]) -> None:
+        """Split the layout in to a column (layouts stacked on top of each other).
+
+        Args:
+            *layouts (Layout): Positional arguments should be (sub) Layout instances.
+        """
+        self.split(*layouts, splitter="column")
+
+    def unsplit(self) -> None:
+        """Reset splits to initial state."""
+        del self._children[:]
+
+    def update(self, renderable: RenderableType) -> None:
+        """Update renderable.
+
+        Args:
+            renderable (RenderableType): New renderable object.
+        """
+        with self._lock:
+            self._renderable = renderable
+
+    def refresh_screen(self, console: "Console", layout_name: str) -> None:
+        """Refresh a sub-layout.
+
+        Args:
+            console (Console): Console instance where Layout is to be rendered.
+            layout_name (str): Name of layout.
+        """
+        with self._lock:
+            layout = self[layout_name]
+            region, _lines = self._render_map[layout]
+            (x, y, width, height) = region
+            lines = console.render_lines(
+                layout, console.options.update_dimensions(width, height)
+            )
+            self._render_map[layout] = LayoutRender(region, lines)
+            console.update_screen_lines(lines, x, y)
+
+    def _make_region_map(self, width: int, height: int) -> RegionMap:
+        """Create a dict that maps layout on to Region."""
+        stack: List[Tuple[Layout, Region]] = [(self, Region(0, 0, width, height))]
+        push = stack.append
+        pop = stack.pop
+        layout_regions: List[Tuple[Layout, Region]] = []
+        append_layout_region = layout_regions.append
+        while stack:
+            append_layout_region(pop())
+            layout, region = layout_regions[-1]
+            children = layout.children
+            if children:
+                for child_and_region in layout.splitter.divide(children, region):
+                    push(child_and_region)
+
+        region_map = {
+            layout: region
+            for layout, region in sorted(layout_regions, key=itemgetter(1))
+        }
+        return region_map
+
+    def render(self, console: Console, options: ConsoleOptions) -> RenderMap:
+        """Render the sub_layouts.
+
+        Args:
+            console (Console): Console instance.
+            options (ConsoleOptions): Console options.
+
+        Returns:
+            RenderMap: A dict that maps Layout on to a tuple of Region, lines
+        """
+        render_width = options.max_width
+        render_height = options.height or console.height
+        region_map = self._make_region_map(render_width, render_height)
+        layout_regions = [
+            (layout, region)
+            for layout, region in region_map.items()
+            if not layout.children
+        ]
+        render_map: Dict["Layout", "LayoutRender"] = {}
+        render_lines = console.render_lines
+        update_dimensions = options.update_dimensions
+
+        for layout, region in layout_regions:
+            lines = render_lines(
+                layout.renderable, update_dimensions(region.width, region.height)
+            )
+            render_map[layout] = LayoutRender(region, lines)
+        return render_map
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        with self._lock:
+            width = options.max_width or console.width
+            height = options.height or console.height
+            render_map = self.render(console, options.update_dimensions(width, height))
+            self._render_map = render_map
+            layout_lines: List[List[Segment]] = [[] for _ in range(height)]
+            _islice = islice
+            for (region, lines) in render_map.values():
+                _x, y, _layout_width, layout_height = region
+                for row, line in zip(
+                    _islice(layout_lines, y, y + layout_height), lines
+                ):
+                    row.extend(line)
+
+            new_line = Segment.line()
+            for layout_row in layout_lines:
+                yield from layout_row
+                yield new_line
+
+
+if __name__ == "__main__":
+    from pip._vendor.rich.console import Console
+
+    console = Console()
+    layout = Layout()
+
+    layout.split_column(
+        Layout(name="header", size=3),
+        Layout(ratio=1, name="main"),
+        Layout(size=10, name="footer"),
+    )
+
+    layout["main"].split_row(Layout(name="side"), Layout(name="body", ratio=2))
+
+    layout["body"].split_row(Layout(name="content", ratio=2), Layout(name="s2"))
+
+    layout["s2"].split_column(
+        Layout(name="top"), Layout(name="middle"), Layout(name="bottom")
+    )
+
+    layout["side"].split_column(Layout(layout.tree, name="left1"), Layout(name="left2"))
+
+    layout["content"].update("foo")
+
+    console.print(layout)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/live.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/live.py
new file mode 100644
index 0000000..e635fe5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/live.py
@@ -0,0 +1,373 @@
+import sys
+from threading import Event, RLock, Thread
+from types import TracebackType
+from typing import IO, Any, Callable, List, Optional, TextIO, Type, cast
+
+from . import get_console
+from .console import Console, ConsoleRenderable, RenderableType, RenderHook
+from .control import Control
+from .file_proxy import FileProxy
+from .jupyter import JupyterMixin
+from .live_render import LiveRender, VerticalOverflowMethod
+from .screen import Screen
+from .text import Text
+
+
+class _RefreshThread(Thread):
+    """A thread that calls refresh() at regular intervals."""
+
+    def __init__(self, live: "Live", refresh_per_second: float) -> None:
+        self.live = live
+        self.refresh_per_second = refresh_per_second
+        self.done = Event()
+        super().__init__(daemon=True)
+
+    def stop(self) -> None:
+        self.done.set()
+
+    def run(self) -> None:
+        while not self.done.wait(1 / self.refresh_per_second):
+            with self.live._lock:
+                if not self.done.is_set():
+                    self.live.refresh()
+
+
+class Live(JupyterMixin, RenderHook):
+    """Renders an auto-updating live display of any given renderable.
+
+    Args:
+        renderable (RenderableType, optional): The renderable to live display. Defaults to displaying nothing.
+        console (Console, optional): Optional Console instance. Default will an internal Console instance writing to stdout.
+        screen (bool, optional): Enable alternate screen mode. Defaults to False.
+        auto_refresh (bool, optional): Enable auto refresh. If disabled, you will need to call `refresh()` or `update()` with refresh flag. Defaults to True
+        refresh_per_second (float, optional): Number of times per second to refresh the live display. Defaults to 4.
+        transient (bool, optional): Clear the renderable on exit (has no effect when screen=True). Defaults to False.
+        redirect_stdout (bool, optional): Enable redirection of stdout, so ``print`` may be used. Defaults to True.
+        redirect_stderr (bool, optional): Enable redirection of stderr. Defaults to True.
+        vertical_overflow (VerticalOverflowMethod, optional): How to handle renderable when it is too tall for the console. Defaults to "ellipsis".
+        get_renderable (Callable[[], RenderableType], optional): Optional callable to get renderable. Defaults to None.
+    """
+
+    def __init__(
+        self,
+        renderable: Optional[RenderableType] = None,
+        *,
+        console: Optional[Console] = None,
+        screen: bool = False,
+        auto_refresh: bool = True,
+        refresh_per_second: float = 4,
+        transient: bool = False,
+        redirect_stdout: bool = True,
+        redirect_stderr: bool = True,
+        vertical_overflow: VerticalOverflowMethod = "ellipsis",
+        get_renderable: Optional[Callable[[], RenderableType]] = None,
+    ) -> None:
+        assert refresh_per_second > 0, "refresh_per_second must be > 0"
+        self._renderable = renderable
+        self.console = console if console is not None else get_console()
+        self._screen = screen
+        self._alt_screen = False
+
+        self._redirect_stdout = redirect_stdout
+        self._redirect_stderr = redirect_stderr
+        self._restore_stdout: Optional[IO[str]] = None
+        self._restore_stderr: Optional[IO[str]] = None
+
+        self._lock = RLock()
+        self.ipy_widget: Optional[Any] = None
+        self.auto_refresh = auto_refresh
+        self._started: bool = False
+        self.transient = True if screen else transient
+
+        self._refresh_thread: Optional[_RefreshThread] = None
+        self.refresh_per_second = refresh_per_second
+
+        self.vertical_overflow = vertical_overflow
+        self._get_renderable = get_renderable
+        self._live_render = LiveRender(
+            self.get_renderable(), vertical_overflow=vertical_overflow
+        )
+
+    @property
+    def is_started(self) -> bool:
+        """Check if live display has been started."""
+        return self._started
+
+    def get_renderable(self) -> RenderableType:
+        renderable = (
+            self._get_renderable()
+            if self._get_renderable is not None
+            else self._renderable
+        )
+        return renderable or ""
+
+    def start(self, refresh: bool = False) -> None:
+        """Start live rendering display.
+
+        Args:
+            refresh (bool, optional): Also refresh. Defaults to False.
+        """
+        with self._lock:
+            if self._started:
+                return
+            self.console.set_live(self)
+            self._started = True
+            if self._screen:
+                self._alt_screen = self.console.set_alt_screen(True)
+            self.console.show_cursor(False)
+            self._enable_redirect_io()
+            self.console.push_render_hook(self)
+            if refresh:
+                try:
+                    self.refresh()
+                except Exception:
+                    # If refresh fails, we want to stop the redirection of sys.stderr,
+                    # so the error stacktrace is properly displayed in the terminal.
+                    # (or, if the code that calls Rich captures the exception and wants to display something,
+                    # let this be displayed in the terminal).
+                    self.stop()
+                    raise
+            if self.auto_refresh:
+                self._refresh_thread = _RefreshThread(self, self.refresh_per_second)
+                self._refresh_thread.start()
+
+    def stop(self) -> None:
+        """Stop live rendering display."""
+        with self._lock:
+            if not self._started:
+                return
+            self.console.clear_live()
+            self._started = False
+
+            if self.auto_refresh and self._refresh_thread is not None:
+                self._refresh_thread.stop()
+                self._refresh_thread = None
+            # allow it to fully render on the last even if overflow
+            self.vertical_overflow = "visible"
+            with self.console:
+                try:
+                    if not self._alt_screen and not self.console.is_jupyter:
+                        self.refresh()
+                finally:
+                    self._disable_redirect_io()
+                    self.console.pop_render_hook()
+                    if not self._alt_screen and self.console.is_terminal:
+                        self.console.line()
+                    self.console.show_cursor(True)
+                    if self._alt_screen:
+                        self.console.set_alt_screen(False)
+
+                    if self.transient and not self._alt_screen:
+                        self.console.control(self._live_render.restore_cursor())
+                    if self.ipy_widget is not None and self.transient:
+                        self.ipy_widget.close()  # pragma: no cover
+
+    def __enter__(self) -> "Live":
+        self.start(refresh=self._renderable is not None)
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.stop()
+
+    def _enable_redirect_io(self) -> None:
+        """Enable redirecting of stdout / stderr."""
+        if self.console.is_terminal or self.console.is_jupyter:
+            if self._redirect_stdout and not isinstance(sys.stdout, FileProxy):
+                self._restore_stdout = sys.stdout
+                sys.stdout = cast("TextIO", FileProxy(self.console, sys.stdout))
+            if self._redirect_stderr and not isinstance(sys.stderr, FileProxy):
+                self._restore_stderr = sys.stderr
+                sys.stderr = cast("TextIO", FileProxy(self.console, sys.stderr))
+
+    def _disable_redirect_io(self) -> None:
+        """Disable redirecting of stdout / stderr."""
+        if self._restore_stdout:
+            sys.stdout = cast("TextIO", self._restore_stdout)
+            self._restore_stdout = None
+        if self._restore_stderr:
+            sys.stderr = cast("TextIO", self._restore_stderr)
+            self._restore_stderr = None
+
+    @property
+    def renderable(self) -> RenderableType:
+        """Get the renderable that is being displayed
+
+        Returns:
+            RenderableType: Displayed renderable.
+        """
+        renderable = self.get_renderable()
+        return Screen(renderable) if self._alt_screen else renderable
+
+    def update(self, renderable: RenderableType, *, refresh: bool = False) -> None:
+        """Update the renderable that is being displayed
+
+        Args:
+            renderable (RenderableType): New renderable to use.
+            refresh (bool, optional): Refresh the display. Defaults to False.
+        """
+        with self._lock:
+            self._renderable = renderable
+            if refresh:
+                self.refresh()
+
+    def refresh(self) -> None:
+        """Update the display of the Live Render."""
+        with self._lock:
+            self._live_render.set_renderable(self.renderable)
+            if self.console.is_jupyter:  # pragma: no cover
+                try:
+                    from IPython.display import display
+                    from ipywidgets import Output
+                except ImportError:
+                    import warnings
+
+                    warnings.warn('install "ipywidgets" for Jupyter support')
+                else:
+                    if self.ipy_widget is None:
+                        self.ipy_widget = Output()
+                        display(self.ipy_widget)
+
+                    with self.ipy_widget:
+                        self.ipy_widget.clear_output(wait=True)
+                        self.console.print(self._live_render.renderable)
+            elif self.console.is_terminal and not self.console.is_dumb_terminal:
+                with self.console:
+                    self.console.print(Control())
+            elif (
+                not self._started and not self.transient
+            ):  # if it is finished allow files or dumb-terminals to see final result
+                with self.console:
+                    self.console.print(Control())
+
+    def process_renderables(
+        self, renderables: List[ConsoleRenderable]
+    ) -> List[ConsoleRenderable]:
+        """Process renderables to restore cursor and display progress."""
+        self._live_render.vertical_overflow = self.vertical_overflow
+        if self.console.is_interactive:
+            # lock needs acquiring as user can modify live_render renderable at any time unlike in Progress.
+            with self._lock:
+                reset = (
+                    Control.home()
+                    if self._alt_screen
+                    else self._live_render.position_cursor()
+                )
+                renderables = [reset, *renderables, self._live_render]
+        elif (
+            not self._started and not self.transient
+        ):  # if it is finished render the final output for files or dumb_terminals
+            renderables = [*renderables, self._live_render]
+
+        return renderables
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import random
+    import time
+    from itertools import cycle
+    from typing import Dict, List, Tuple
+
+    from .align import Align
+    from .console import Console
+    from .live import Live as Live
+    from .panel import Panel
+    from .rule import Rule
+    from .syntax import Syntax
+    from .table import Table
+
+    console = Console()
+
+    syntax = Syntax(
+        '''def loop_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value''',
+        "python",
+        line_numbers=True,
+    )
+
+    table = Table("foo", "bar", "baz")
+    table.add_row("1", "2", "3")
+
+    progress_renderables = [
+        "You can make the terminal shorter and taller to see the live table hide"
+        "Text may be printed while the progress bars are rendering.",
+        Panel("In fact, [i]any[/i] renderable will work"),
+        "Such as [magenta]tables[/]...",
+        table,
+        "Pretty printed structures...",
+        {"type": "example", "text": "Pretty printed"},
+        "Syntax...",
+        syntax,
+        Rule("Give it a try!"),
+    ]
+
+    examples = cycle(progress_renderables)
+
+    exchanges = [
+        "SGD",
+        "MYR",
+        "EUR",
+        "USD",
+        "AUD",
+        "JPY",
+        "CNH",
+        "HKD",
+        "CAD",
+        "INR",
+        "DKK",
+        "GBP",
+        "RUB",
+        "NZD",
+        "MXN",
+        "IDR",
+        "TWD",
+        "THB",
+        "VND",
+    ]
+    with Live(console=console) as live_table:
+        exchange_rate_dict: Dict[Tuple[str, str], float] = {}
+
+        for index in range(100):
+            select_exchange = exchanges[index % len(exchanges)]
+
+            for exchange in exchanges:
+                if exchange == select_exchange:
+                    continue
+                time.sleep(0.4)
+                if random.randint(0, 10) < 1:
+                    console.log(next(examples))
+                exchange_rate_dict[(select_exchange, exchange)] = 200 / (
+                    (random.random() * 320) + 1
+                )
+                if len(exchange_rate_dict) > len(exchanges) - 1:
+                    exchange_rate_dict.pop(list(exchange_rate_dict.keys())[0])
+                table = Table(title="Exchange Rates")
+
+                table.add_column("Source Currency")
+                table.add_column("Destination Currency")
+                table.add_column("Exchange Rate")
+
+                for ((source, dest), exchange_rate) in exchange_rate_dict.items():
+                    table.add_row(
+                        source,
+                        dest,
+                        Text(
+                            f"{exchange_rate:.4f}",
+                            style="red" if exchange_rate < 1.0 else "green",
+                        ),
+                    )
+
+                live_table.update(Align.center(table))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/live_render.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/live_render.py
new file mode 100644
index 0000000..b90fbf7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/live_render.py
@@ -0,0 +1,113 @@
+import sys
+from typing import Optional, Tuple
+
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+
+from ._loop import loop_last
+from .console import Console, ConsoleOptions, RenderableType, RenderResult
+from .control import Control
+from .segment import ControlType, Segment
+from .style import StyleType
+from .text import Text
+
+VerticalOverflowMethod = Literal["crop", "ellipsis", "visible"]
+
+
+class LiveRender:
+    """Creates a renderable that may be updated.
+
+    Args:
+        renderable (RenderableType): Any renderable object.
+        style (StyleType, optional): An optional style to apply to the renderable. Defaults to "".
+    """
+
+    def __init__(
+        self,
+        renderable: RenderableType,
+        style: StyleType = "",
+        vertical_overflow: VerticalOverflowMethod = "ellipsis",
+    ) -> None:
+        self.renderable = renderable
+        self.style = style
+        self.vertical_overflow = vertical_overflow
+        self._shape: Optional[Tuple[int, int]] = None
+
+    def set_renderable(self, renderable: RenderableType) -> None:
+        """Set a new renderable.
+
+        Args:
+            renderable (RenderableType): Any renderable object, including str.
+        """
+        self.renderable = renderable
+
+    def position_cursor(self) -> Control:
+        """Get control codes to move cursor to beginning of live render.
+
+        Returns:
+            Control: A control instance that may be printed.
+        """
+        if self._shape is not None:
+            _, height = self._shape
+            return Control(
+                ControlType.CARRIAGE_RETURN,
+                (ControlType.ERASE_IN_LINE, 2),
+                *(
+                    (
+                        (ControlType.CURSOR_UP, 1),
+                        (ControlType.ERASE_IN_LINE, 2),
+                    )
+                    * (height - 1)
+                )
+            )
+        return Control()
+
+    def restore_cursor(self) -> Control:
+        """Get control codes to clear the render and restore the cursor to its previous position.
+
+        Returns:
+            Control: A Control instance that may be printed.
+        """
+        if self._shape is not None:
+            _, height = self._shape
+            return Control(
+                ControlType.CARRIAGE_RETURN,
+                *((ControlType.CURSOR_UP, 1), (ControlType.ERASE_IN_LINE, 2)) * height
+            )
+        return Control()
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+
+        renderable = self.renderable
+        style = console.get_style(self.style)
+        lines = console.render_lines(renderable, options, style=style, pad=False)
+        shape = Segment.get_shape(lines)
+
+        _, height = shape
+        if height > options.size.height:
+            if self.vertical_overflow == "crop":
+                lines = lines[: options.size.height]
+                shape = Segment.get_shape(lines)
+            elif self.vertical_overflow == "ellipsis":
+                lines = lines[: (options.size.height - 1)]
+                overflow_text = Text(
+                    "...",
+                    overflow="crop",
+                    justify="center",
+                    end="",
+                    style="live.ellipsis",
+                )
+                lines.append(list(console.render(overflow_text)))
+                shape = Segment.get_shape(lines)
+        self._shape = shape
+
+        new_line = Segment.line()
+        for last, line in loop_last(lines):
+            yield from line
+            if not last:
+                yield new_line
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/logging.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/logging.py
new file mode 100644
index 0000000..58188fd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/logging.py
@@ -0,0 +1,280 @@
+import logging
+from datetime import datetime
+from logging import Handler, LogRecord
+from pathlib import Path
+from types import ModuleType
+from typing import ClassVar, List, Optional, Iterable, Type, Union
+
+from . import get_console
+from ._log_render import LogRender, FormatTimeCallable
+from .console import Console, ConsoleRenderable
+from .highlighter import Highlighter, ReprHighlighter
+from .text import Text
+from .traceback import Traceback
+
+
+class RichHandler(Handler):
+    """A logging handler that renders output with Rich. The time / level / message and file are displayed in columns.
+    The level is color coded, and the message is syntax highlighted.
+
+    Note:
+        Be careful when enabling console markup in log messages if you have configured logging for libraries not
+        under your control. If a dependency writes messages containing square brackets, it may not produce the intended output.
+
+    Args:
+        level (Union[int, str], optional): Log level. Defaults to logging.NOTSET.
+        console (:class:`~rich.console.Console`, optional): Optional console instance to write logs.
+            Default will use a global console instance writing to stdout.
+        show_time (bool, optional): Show a column for the time. Defaults to True.
+        omit_repeated_times (bool, optional): Omit repetition of the same time. Defaults to True.
+        show_level (bool, optional): Show a column for the level. Defaults to True.
+        show_path (bool, optional): Show the path to the original log call. Defaults to True.
+        enable_link_path (bool, optional): Enable terminal link of path column to file. Defaults to True.
+        highlighter (Highlighter, optional): Highlighter to style log messages, or None to use ReprHighlighter. Defaults to None.
+        markup (bool, optional): Enable console markup in log messages. Defaults to False.
+        rich_tracebacks (bool, optional): Enable rich tracebacks with syntax highlighting and formatting. Defaults to False.
+        tracebacks_width (Optional[int], optional): Number of characters used to render tracebacks, or None for full width. Defaults to None.
+        tracebacks_extra_lines (int, optional): Additional lines of code to render tracebacks, or None for full width. Defaults to None.
+        tracebacks_theme (str, optional): Override pygments theme used in traceback.
+        tracebacks_word_wrap (bool, optional): Enable word wrapping of long tracebacks lines. Defaults to True.
+        tracebacks_show_locals (bool, optional): Enable display of locals in tracebacks. Defaults to False.
+        tracebacks_suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
+        locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to 10.
+        locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
+        log_time_format (Union[str, TimeFormatterCallable], optional): If ``log_time`` is enabled, either string for strftime or callable that formats the time. Defaults to "[%x %X] ".
+        keywords (List[str], optional): List of words to highlight instead of ``RichHandler.KEYWORDS``.
+    """
+
+    KEYWORDS: ClassVar[Optional[List[str]]] = [
+        "GET",
+        "POST",
+        "HEAD",
+        "PUT",
+        "DELETE",
+        "OPTIONS",
+        "TRACE",
+        "PATCH",
+    ]
+    HIGHLIGHTER_CLASS: ClassVar[Type[Highlighter]] = ReprHighlighter
+
+    def __init__(
+        self,
+        level: Union[int, str] = logging.NOTSET,
+        console: Optional[Console] = None,
+        *,
+        show_time: bool = True,
+        omit_repeated_times: bool = True,
+        show_level: bool = True,
+        show_path: bool = True,
+        enable_link_path: bool = True,
+        highlighter: Optional[Highlighter] = None,
+        markup: bool = False,
+        rich_tracebacks: bool = False,
+        tracebacks_width: Optional[int] = None,
+        tracebacks_extra_lines: int = 3,
+        tracebacks_theme: Optional[str] = None,
+        tracebacks_word_wrap: bool = True,
+        tracebacks_show_locals: bool = False,
+        tracebacks_suppress: Iterable[Union[str, ModuleType]] = (),
+        locals_max_length: int = 10,
+        locals_max_string: int = 80,
+        log_time_format: Union[str, FormatTimeCallable] = "[%x %X]",
+        keywords: Optional[List[str]] = None,
+    ) -> None:
+        super().__init__(level=level)
+        self.console = console or get_console()
+        self.highlighter = highlighter or self.HIGHLIGHTER_CLASS()
+        self._log_render = LogRender(
+            show_time=show_time,
+            show_level=show_level,
+            show_path=show_path,
+            time_format=log_time_format,
+            omit_repeated_times=omit_repeated_times,
+            level_width=None,
+        )
+        self.enable_link_path = enable_link_path
+        self.markup = markup
+        self.rich_tracebacks = rich_tracebacks
+        self.tracebacks_width = tracebacks_width
+        self.tracebacks_extra_lines = tracebacks_extra_lines
+        self.tracebacks_theme = tracebacks_theme
+        self.tracebacks_word_wrap = tracebacks_word_wrap
+        self.tracebacks_show_locals = tracebacks_show_locals
+        self.tracebacks_suppress = tracebacks_suppress
+        self.locals_max_length = locals_max_length
+        self.locals_max_string = locals_max_string
+        self.keywords = keywords
+
+    def get_level_text(self, record: LogRecord) -> Text:
+        """Get the level name from the record.
+
+        Args:
+            record (LogRecord): LogRecord instance.
+
+        Returns:
+            Text: A tuple of the style and level name.
+        """
+        level_name = record.levelname
+        level_text = Text.styled(
+            level_name.ljust(8), f"logging.level.{level_name.lower()}"
+        )
+        return level_text
+
+    def emit(self, record: LogRecord) -> None:
+        """Invoked by logging."""
+        message = self.format(record)
+        traceback = None
+        if (
+            self.rich_tracebacks
+            and record.exc_info
+            and record.exc_info != (None, None, None)
+        ):
+            exc_type, exc_value, exc_traceback = record.exc_info
+            assert exc_type is not None
+            assert exc_value is not None
+            traceback = Traceback.from_exception(
+                exc_type,
+                exc_value,
+                exc_traceback,
+                width=self.tracebacks_width,
+                extra_lines=self.tracebacks_extra_lines,
+                theme=self.tracebacks_theme,
+                word_wrap=self.tracebacks_word_wrap,
+                show_locals=self.tracebacks_show_locals,
+                locals_max_length=self.locals_max_length,
+                locals_max_string=self.locals_max_string,
+                suppress=self.tracebacks_suppress,
+            )
+            message = record.getMessage()
+            if self.formatter:
+                record.message = record.getMessage()
+                formatter = self.formatter
+                if hasattr(formatter, "usesTime") and formatter.usesTime():
+                    record.asctime = formatter.formatTime(record, formatter.datefmt)
+                message = formatter.formatMessage(record)
+
+        message_renderable = self.render_message(record, message)
+        log_renderable = self.render(
+            record=record, traceback=traceback, message_renderable=message_renderable
+        )
+        try:
+            self.console.print(log_renderable)
+        except Exception:
+            self.handleError(record)
+
+    def render_message(self, record: LogRecord, message: str) -> "ConsoleRenderable":
+        """Render message text in to Text.
+
+        record (LogRecord): logging Record.
+        message (str): String containing log message.
+
+        Returns:
+            ConsoleRenderable: Renderable to display log message.
+        """
+        use_markup = getattr(record, "markup", self.markup)
+        message_text = Text.from_markup(message) if use_markup else Text(message)
+
+        highlighter = getattr(record, "highlighter", self.highlighter)
+        if highlighter:
+            message_text = highlighter(message_text)
+
+        if self.keywords is None:
+            self.keywords = self.KEYWORDS
+
+        if self.keywords:
+            message_text.highlight_words(self.keywords, "logging.keyword")
+
+        return message_text
+
+    def render(
+        self,
+        *,
+        record: LogRecord,
+        traceback: Optional[Traceback],
+        message_renderable: "ConsoleRenderable",
+    ) -> "ConsoleRenderable":
+        """Render log for display.
+
+        Args:
+            record (LogRecord): logging Record.
+            traceback (Optional[Traceback]): Traceback instance or None for no Traceback.
+            message_renderable (ConsoleRenderable): Renderable (typically Text) containing log message contents.
+
+        Returns:
+            ConsoleRenderable: Renderable to display log.
+        """
+        path = Path(record.pathname).name
+        level = self.get_level_text(record)
+        time_format = None if self.formatter is None else self.formatter.datefmt
+        log_time = datetime.fromtimestamp(record.created)
+
+        log_renderable = self._log_render(
+            self.console,
+            [message_renderable] if not traceback else [message_renderable, traceback],
+            log_time=log_time,
+            time_format=time_format,
+            level=level,
+            path=path,
+            line_no=record.lineno,
+            link_path=record.pathname if self.enable_link_path else None,
+        )
+        return log_renderable
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from time import sleep
+
+    FORMAT = "%(message)s"
+    # FORMAT = "%(asctime)-15s - %(levelname)s - %(message)s"
+    logging.basicConfig(
+        level="NOTSET",
+        format=FORMAT,
+        datefmt="[%X]",
+        handlers=[RichHandler(rich_tracebacks=True, tracebacks_show_locals=True)],
+    )
+    log = logging.getLogger("rich")
+
+    log.info("Server starting...")
+    log.info("Listening on http://127.0.0.1:8080")
+    sleep(1)
+
+    log.info("GET /index.html 200 1298")
+    log.info("GET /imgs/backgrounds/back1.jpg 200 54386")
+    log.info("GET /css/styles.css 200 54386")
+    log.warning("GET /favicon.ico 404 242")
+    sleep(1)
+
+    log.debug(
+        "JSONRPC request\n--> %r\n<-- %r",
+        {
+            "version": "1.1",
+            "method": "confirmFruitPurchase",
+            "params": [["apple", "orange", "mangoes", "pomelo"], 1.123],
+            "id": "194521489",
+        },
+        {"version": "1.1", "result": True, "error": None, "id": "194521489"},
+    )
+    log.debug(
+        "Loading configuration file /adasd/asdasd/qeqwe/qwrqwrqwr/sdgsdgsdg/werwerwer/dfgerert/ertertert/ertetert/werwerwer"
+    )
+    log.error("Unable to find 'pomelo' in database!")
+    log.info("POST /jsonrpc/ 200 65532")
+    log.info("POST /admin/ 401 42234")
+    log.warning("password was rejected for admin site.")
+
+    def divide() -> None:
+        number = 1
+        divisor = 0
+        foos = ["foo"] * 100
+        log.debug("in divide")
+        try:
+            number / divisor
+        except:
+            log.exception("An error of some kind occurred!")
+
+    divide()
+    sleep(1)
+    log.critical("Out of memory!")
+    log.info("Server exited with code=-1")
+    log.info("[bold]EXITING...[/bold]", extra=dict(markup=True))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/markup.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/markup.py
new file mode 100644
index 0000000..fd80d8c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/markup.py
@@ -0,0 +1,246 @@
+import re
+from ast import literal_eval
+from operator import attrgetter
+from typing import Callable, Iterable, List, Match, NamedTuple, Optional, Tuple, Union
+
+from ._emoji_replace import _emoji_replace
+from .emoji import EmojiVariant
+from .errors import MarkupError
+from .style import Style
+from .text import Span, Text
+
+RE_TAGS = re.compile(
+    r"""((\\*)\[([a-z#/@][^[]*?)])""",
+    re.VERBOSE,
+)
+
+RE_HANDLER = re.compile(r"^([\w.]*?)(\(.*?\))?$")
+
+
+class Tag(NamedTuple):
+    """A tag in console markup."""
+
+    name: str
+    """The tag name. e.g. 'bold'."""
+    parameters: Optional[str]
+    """Any additional parameters after the name."""
+
+    def __str__(self) -> str:
+        return (
+            self.name if self.parameters is None else f"{self.name} {self.parameters}"
+        )
+
+    @property
+    def markup(self) -> str:
+        """Get the string representation of this tag."""
+        return (
+            f"[{self.name}]"
+            if self.parameters is None
+            else f"[{self.name}={self.parameters}]"
+        )
+
+
+_ReStringMatch = Match[str]  # regex match object
+_ReSubCallable = Callable[[_ReStringMatch], str]  # Callable invoked by re.sub
+_EscapeSubMethod = Callable[[_ReSubCallable, str], str]  # Sub method of a compiled re
+
+
+def escape(
+    markup: str,
+    _escape: _EscapeSubMethod = re.compile(r"(\\*)(\[[a-z#/@][^[]*?])").sub,
+) -> str:
+    """Escapes text so that it won't be interpreted as markup.
+
+    Args:
+        markup (str): Content to be inserted in to markup.
+
+    Returns:
+        str: Markup with square brackets escaped.
+    """
+
+    def escape_backslashes(match: Match[str]) -> str:
+        """Called by re.sub replace matches."""
+        backslashes, text = match.groups()
+        return f"{backslashes}{backslashes}\\{text}"
+
+    markup = _escape(escape_backslashes, markup)
+    return markup
+
+
+def _parse(markup: str) -> Iterable[Tuple[int, Optional[str], Optional[Tag]]]:
+    """Parse markup in to an iterable of tuples of (position, text, tag).
+
+    Args:
+        markup (str): A string containing console markup
+
+    """
+    position = 0
+    _divmod = divmod
+    _Tag = Tag
+    for match in RE_TAGS.finditer(markup):
+        full_text, escapes, tag_text = match.groups()
+        start, end = match.span()
+        if start > position:
+            yield start, markup[position:start], None
+        if escapes:
+            backslashes, escaped = _divmod(len(escapes), 2)
+            if backslashes:
+                # Literal backslashes
+                yield start, "\\" * backslashes, None
+                start += backslashes * 2
+            if escaped:
+                # Escape of tag
+                yield start, full_text[len(escapes) :], None
+                position = end
+                continue
+        text, equals, parameters = tag_text.partition("=")
+        yield start, None, _Tag(text, parameters if equals else None)
+        position = end
+    if position < len(markup):
+        yield position, markup[position:], None
+
+
+def render(
+    markup: str,
+    style: Union[str, Style] = "",
+    emoji: bool = True,
+    emoji_variant: Optional[EmojiVariant] = None,
+) -> Text:
+    """Render console markup in to a Text instance.
+
+    Args:
+        markup (str): A string containing console markup.
+        emoji (bool, optional): Also render emoji code. Defaults to True.
+
+    Raises:
+        MarkupError: If there is a syntax error in the markup.
+
+    Returns:
+        Text: A test instance.
+    """
+    emoji_replace = _emoji_replace
+    if "[" not in markup:
+        return Text(
+            emoji_replace(markup, default_variant=emoji_variant) if emoji else markup,
+            style=style,
+        )
+    text = Text(style=style)
+    append = text.append
+    normalize = Style.normalize
+
+    style_stack: List[Tuple[int, Tag]] = []
+    pop = style_stack.pop
+
+    spans: List[Span] = []
+    append_span = spans.append
+
+    _Span = Span
+    _Tag = Tag
+
+    def pop_style(style_name: str) -> Tuple[int, Tag]:
+        """Pop tag matching given style name."""
+        for index, (_, tag) in enumerate(reversed(style_stack), 1):
+            if tag.name == style_name:
+                return pop(-index)
+        raise KeyError(style_name)
+
+    for position, plain_text, tag in _parse(markup):
+        if plain_text is not None:
+            # Handle open brace escapes, where the brace is not part of a tag.
+            plain_text = plain_text.replace("\\[", "[")
+            append(emoji_replace(plain_text) if emoji else plain_text)
+        elif tag is not None:
+            if tag.name.startswith("/"):  # Closing tag
+                style_name = tag.name[1:].strip()
+
+                if style_name:  # explicit close
+                    style_name = normalize(style_name)
+                    try:
+                        start, open_tag = pop_style(style_name)
+                    except KeyError:
+                        raise MarkupError(
+                            f"closing tag '{tag.markup}' at position {position} doesn't match any open tag"
+                        ) from None
+                else:  # implicit close
+                    try:
+                        start, open_tag = pop()
+                    except IndexError:
+                        raise MarkupError(
+                            f"closing tag '[/]' at position {position} has nothing to close"
+                        ) from None
+
+                if open_tag.name.startswith("@"):
+                    if open_tag.parameters:
+                        handler_name = ""
+                        parameters = open_tag.parameters.strip()
+                        handler_match = RE_HANDLER.match(parameters)
+                        if handler_match is not None:
+                            handler_name, match_parameters = handler_match.groups()
+                            parameters = (
+                                "()" if match_parameters is None else match_parameters
+                            )
+
+                        try:
+                            meta_params = literal_eval(parameters)
+                        except SyntaxError as error:
+                            raise MarkupError(
+                                f"error parsing {parameters!r} in {open_tag.parameters!r}; {error.msg}"
+                            )
+                        except Exception as error:
+                            raise MarkupError(
+                                f"error parsing {open_tag.parameters!r}; {error}"
+                            ) from None
+
+                        if handler_name:
+                            meta_params = (
+                                handler_name,
+                                meta_params
+                                if isinstance(meta_params, tuple)
+                                else (meta_params,),
+                            )
+
+                    else:
+                        meta_params = ()
+
+                    append_span(
+                        _Span(
+                            start, len(text), Style(meta={open_tag.name: meta_params})
+                        )
+                    )
+                else:
+                    append_span(_Span(start, len(text), str(open_tag)))
+
+            else:  # Opening tag
+                normalized_tag = _Tag(normalize(tag.name), tag.parameters)
+                style_stack.append((len(text), normalized_tag))
+
+    text_length = len(text)
+    while style_stack:
+        start, tag = style_stack.pop()
+        style = str(tag)
+        if style:
+            append_span(_Span(start, text_length, style))
+
+    text.spans = sorted(spans[::-1], key=attrgetter("start"))
+    return text
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    MARKUP = [
+        "[red]Hello World[/red]",
+        "[magenta]Hello [b]World[/b]",
+        "[bold]Bold[italic] bold and italic [/bold]italic[/italic]",
+        "Click [link=https://www.willmcgugan.com]here[/link] to visit my Blog",
+        ":warning-emoji: [bold red blink] DANGER![/]",
+    ]
+
+    from pip._vendor.rich import print
+    from pip._vendor.rich.table import Table
+
+    grid = Table("Markup", "Result", padding=(0, 1))
+
+    for markup in MARKUP:
+        grid.add_row(Text(markup), markup)
+
+    print(grid)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/measure.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/measure.py
new file mode 100644
index 0000000..a508ffa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/measure.py
@@ -0,0 +1,151 @@
+from operator import itemgetter
+from typing import TYPE_CHECKING, Callable, NamedTuple, Optional, Sequence
+
+from . import errors
+from .protocol import is_renderable, rich_cast
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderableType
+
+
+class Measurement(NamedTuple):
+    """Stores the minimum and maximum widths (in characters) required to render an object."""
+
+    minimum: int
+    """Minimum number of cells required to render."""
+    maximum: int
+    """Maximum number of cells required to render."""
+
+    @property
+    def span(self) -> int:
+        """Get difference between maximum and minimum."""
+        return self.maximum - self.minimum
+
+    def normalize(self) -> "Measurement":
+        """Get measurement that ensures that minimum <= maximum and minimum >= 0
+
+        Returns:
+            Measurement: A normalized measurement.
+        """
+        minimum, maximum = self
+        minimum = min(max(0, minimum), maximum)
+        return Measurement(max(0, minimum), max(0, max(minimum, maximum)))
+
+    def with_maximum(self, width: int) -> "Measurement":
+        """Get a RenderableWith where the widths are <= width.
+
+        Args:
+            width (int): Maximum desired width.
+
+        Returns:
+            Measurement: New Measurement object.
+        """
+        minimum, maximum = self
+        return Measurement(min(minimum, width), min(maximum, width))
+
+    def with_minimum(self, width: int) -> "Measurement":
+        """Get a RenderableWith where the widths are >= width.
+
+        Args:
+            width (int): Minimum desired width.
+
+        Returns:
+            Measurement: New Measurement object.
+        """
+        minimum, maximum = self
+        width = max(0, width)
+        return Measurement(max(minimum, width), max(maximum, width))
+
+    def clamp(
+        self, min_width: Optional[int] = None, max_width: Optional[int] = None
+    ) -> "Measurement":
+        """Clamp a measurement within the specified range.
+
+        Args:
+            min_width (int): Minimum desired width, or ``None`` for no minimum. Defaults to None.
+            max_width (int): Maximum desired width, or ``None`` for no maximum. Defaults to None.
+
+        Returns:
+            Measurement: New Measurement object.
+        """
+        measurement = self
+        if min_width is not None:
+            measurement = measurement.with_minimum(min_width)
+        if max_width is not None:
+            measurement = measurement.with_maximum(max_width)
+        return measurement
+
+    @classmethod
+    def get(
+        cls, console: "Console", options: "ConsoleOptions", renderable: "RenderableType"
+    ) -> "Measurement":
+        """Get a measurement for a renderable.
+
+        Args:
+            console (~rich.console.Console): Console instance.
+            options (~rich.console.ConsoleOptions): Console options.
+            renderable (RenderableType): An object that may be rendered with Rich.
+
+        Raises:
+            errors.NotRenderableError: If the object is not renderable.
+
+        Returns:
+            Measurement: Measurement object containing range of character widths required to render the object.
+        """
+        _max_width = options.max_width
+        if _max_width < 1:
+            return Measurement(0, 0)
+        if isinstance(renderable, str):
+            renderable = console.render_str(
+                renderable, markup=options.markup, highlight=False
+            )
+        renderable = rich_cast(renderable)
+        if is_renderable(renderable):
+            get_console_width: Optional[
+                Callable[["Console", "ConsoleOptions"], "Measurement"]
+            ] = getattr(renderable, "__rich_measure__", None)
+            if get_console_width is not None:
+                render_width = (
+                    get_console_width(console, options)
+                    .normalize()
+                    .with_maximum(_max_width)
+                )
+                if render_width.maximum < 1:
+                    return Measurement(0, 0)
+                return render_width.normalize()
+            else:
+                return Measurement(0, _max_width)
+        else:
+            raise errors.NotRenderableError(
+                f"Unable to get render width for {renderable!r}; "
+                "a str, Segment, or object with __rich_console__ method is required"
+            )
+
+
+def measure_renderables(
+    console: "Console",
+    options: "ConsoleOptions",
+    renderables: Sequence["RenderableType"],
+) -> "Measurement":
+    """Get a measurement that would fit a number of renderables.
+
+    Args:
+        console (~rich.console.Console): Console instance.
+        options (~rich.console.ConsoleOptions): Console options.
+        renderables (Iterable[RenderableType]): One or more renderable objects.
+
+    Returns:
+        Measurement: Measurement object containing range of character widths required to
+            contain all given renderables.
+    """
+    if not renderables:
+        return Measurement(0, 0)
+    get_measurement = Measurement.get
+    measurements = [
+        get_measurement(console, options, renderable) for renderable in renderables
+    ]
+    measured_width = Measurement(
+        max(measurements, key=itemgetter(0)).minimum,
+        max(measurements, key=itemgetter(1)).maximum,
+    )
+    return measured_width
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/padding.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/padding.py
new file mode 100644
index 0000000..1b2204f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/padding.py
@@ -0,0 +1,141 @@
+from typing import cast, List, Optional, Tuple, TYPE_CHECKING, Union
+
+if TYPE_CHECKING:
+    from .console import (
+        Console,
+        ConsoleOptions,
+        RenderableType,
+        RenderResult,
+    )
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .style import Style
+from .segment import Segment
+
+
+PaddingDimensions = Union[int, Tuple[int], Tuple[int, int], Tuple[int, int, int, int]]
+
+
+class Padding(JupyterMixin):
+    """Draw space around content.
+
+    Example:
+        >>> print(Padding("Hello", (2, 4), style="on blue"))
+
+    Args:
+        renderable (RenderableType): String or other renderable.
+        pad (Union[int, Tuple[int]]): Padding for top, right, bottom, and left borders.
+            May be specified with 1, 2, or 4 integers (CSS style).
+        style (Union[str, Style], optional): Style for padding characters. Defaults to "none".
+        expand (bool, optional): Expand padding to fit available width. Defaults to True.
+    """
+
+    def __init__(
+        self,
+        renderable: "RenderableType",
+        pad: "PaddingDimensions" = (0, 0, 0, 0),
+        *,
+        style: Union[str, Style] = "none",
+        expand: bool = True,
+    ):
+        self.renderable = renderable
+        self.top, self.right, self.bottom, self.left = self.unpack(pad)
+        self.style = style
+        self.expand = expand
+
+    @classmethod
+    def indent(cls, renderable: "RenderableType", level: int) -> "Padding":
+        """Make padding instance to render an indent.
+
+        Args:
+            renderable (RenderableType): String or other renderable.
+            level (int): Number of characters to indent.
+
+        Returns:
+            Padding: A Padding instance.
+        """
+
+        return Padding(renderable, pad=(0, 0, 0, level), expand=False)
+
+    @staticmethod
+    def unpack(pad: "PaddingDimensions") -> Tuple[int, int, int, int]:
+        """Unpack padding specified in CSS style."""
+        if isinstance(pad, int):
+            return (pad, pad, pad, pad)
+        if len(pad) == 1:
+            _pad = pad[0]
+            return (_pad, _pad, _pad, _pad)
+        if len(pad) == 2:
+            pad_top, pad_right = cast(Tuple[int, int], pad)
+            return (pad_top, pad_right, pad_top, pad_right)
+        if len(pad) == 4:
+            top, right, bottom, left = cast(Tuple[int, int, int, int], pad)
+            return (top, right, bottom, left)
+        raise ValueError(f"1, 2 or 4 integers required for padding; {len(pad)} given")
+
+    def __repr__(self) -> str:
+        return f"Padding({self.renderable!r}, ({self.top},{self.right},{self.bottom},{self.left}))"
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        style = console.get_style(self.style)
+        if self.expand:
+            width = options.max_width
+        else:
+            width = min(
+                Measurement.get(console, options, self.renderable).maximum
+                + self.left
+                + self.right,
+                options.max_width,
+            )
+        render_options = options.update_width(width - self.left - self.right)
+        if render_options.height is not None:
+            render_options = render_options.update_height(
+                height=render_options.height - self.top - self.bottom
+            )
+        lines = console.render_lines(
+            self.renderable, render_options, style=style, pad=True
+        )
+        _Segment = Segment
+
+        left = _Segment(" " * self.left, style) if self.left else None
+        right = (
+            [_Segment(f'{" " * self.right}', style), _Segment.line()]
+            if self.right
+            else [_Segment.line()]
+        )
+        blank_line: Optional[List[Segment]] = None
+        if self.top:
+            blank_line = [_Segment(f'{" " * width}\n', style)]
+            yield from blank_line * self.top
+        if left:
+            for line in lines:
+                yield left
+                yield from line
+                yield from right
+        else:
+            for line in lines:
+                yield from line
+                yield from right
+        if self.bottom:
+            blank_line = blank_line or [_Segment(f'{" " * width}\n', style)]
+            yield from blank_line * self.bottom
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        max_width = options.max_width
+        extra_width = self.left + self.right
+        if max_width - extra_width < 1:
+            return Measurement(max_width, max_width)
+        measure_min, measure_max = Measurement.get(console, options, self.renderable)
+        measurement = Measurement(measure_min + extra_width, measure_max + extra_width)
+        measurement = measurement.with_maximum(max_width)
+        return measurement
+
+
+if __name__ == "__main__":  #  pragma: no cover
+    from pip._vendor.rich import print
+
+    print(Padding("Hello, World", (2, 4), style="on blue"))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/pager.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/pager.py
new file mode 100644
index 0000000..a3f7aa6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/pager.py
@@ -0,0 +1,34 @@
+from abc import ABC, abstractmethod
+from typing import Any
+
+
+class Pager(ABC):
+    """Base class for a pager."""
+
+    @abstractmethod
+    def show(self, content: str) -> None:
+        """Show content in pager.
+
+        Args:
+            content (str): Content to be displayed.
+        """
+
+
+class SystemPager(Pager):
+    """Uses the pager installed on the system."""
+
+    def _pager(self, content: str) -> Any:  #  pragma: no cover
+        return __import__("pydoc").pager(content)
+
+    def show(self, content: str) -> None:
+        """Use the same pager used by pydoc."""
+        self._pager(content)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from .__main__ import make_test_card
+    from .console import Console
+
+    console = Console()
+    with console.pager(styles=True):
+        console.print(make_test_card())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/palette.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/palette.py
new file mode 100644
index 0000000..fa0c4dd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/palette.py
@@ -0,0 +1,100 @@
+from math import sqrt
+from functools import lru_cache
+from typing import Sequence, Tuple, TYPE_CHECKING
+
+from .color_triplet import ColorTriplet
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.table import Table
+
+
+class Palette:
+    """A palette of available colors."""
+
+    def __init__(self, colors: Sequence[Tuple[int, int, int]]):
+        self._colors = colors
+
+    def __getitem__(self, number: int) -> ColorTriplet:
+        return ColorTriplet(*self._colors[number])
+
+    def __rich__(self) -> "Table":
+        from pip._vendor.rich.color import Color
+        from pip._vendor.rich.style import Style
+        from pip._vendor.rich.text import Text
+        from pip._vendor.rich.table import Table
+
+        table = Table(
+            "index",
+            "RGB",
+            "Color",
+            title="Palette",
+            caption=f"{len(self._colors)} colors",
+            highlight=True,
+            caption_justify="right",
+        )
+        for index, color in enumerate(self._colors):
+            table.add_row(
+                str(index),
+                repr(color),
+                Text(" " * 16, style=Style(bgcolor=Color.from_rgb(*color))),
+            )
+        return table
+
+    # This is somewhat inefficient and needs caching
+    @lru_cache(maxsize=1024)
+    def match(self, color: Tuple[int, int, int]) -> int:
+        """Find a color from a palette that most closely matches a given color.
+
+        Args:
+            color (Tuple[int, int, int]): RGB components in range 0 > 255.
+
+        Returns:
+            int: Index of closes matching color.
+        """
+        red1, green1, blue1 = color
+        _sqrt = sqrt
+        get_color = self._colors.__getitem__
+
+        def get_color_distance(index: int) -> float:
+            """Get the distance to a color."""
+            red2, green2, blue2 = get_color(index)
+            red_mean = (red1 + red2) // 2
+            red = red1 - red2
+            green = green1 - green2
+            blue = blue1 - blue2
+            return _sqrt(
+                (((512 + red_mean) * red * red) >> 8)
+                + 4 * green * green
+                + (((767 - red_mean) * blue * blue) >> 8)
+            )
+
+        min_index = min(range(len(self._colors)), key=get_color_distance)
+        return min_index
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import colorsys
+    from typing import Iterable
+    from pip._vendor.rich.color import Color
+    from pip._vendor.rich.console import Console, ConsoleOptions
+    from pip._vendor.rich.segment import Segment
+    from pip._vendor.rich.style import Style
+
+    class ColorBox:
+        def __rich_console__(
+            self, console: Console, options: ConsoleOptions
+        ) -> Iterable[Segment]:
+            height = console.size.height - 3
+            for y in range(0, height):
+                for x in range(options.max_width):
+                    h = x / options.max_width
+                    l = y / (height + 1)
+                    r1, g1, b1 = colorsys.hls_to_rgb(h, l, 1.0)
+                    r2, g2, b2 = colorsys.hls_to_rgb(h, l + (1 / height / 2), 1.0)
+                    bgcolor = Color.from_rgb(r1 * 255, g1 * 255, b1 * 255)
+                    color = Color.from_rgb(r2 * 255, g2 * 255, b2 * 255)
+                    yield Segment("▄", Style(color=color, bgcolor=bgcolor))
+                yield Segment.line()
+
+    console = Console()
+    console.print(ColorBox())
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/panel.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/panel.py
new file mode 100644
index 0000000..fc2807c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/panel.py
@@ -0,0 +1,251 @@
+from typing import TYPE_CHECKING, Optional
+
+from .align import AlignMethod
+from .box import ROUNDED, Box
+from .jupyter import JupyterMixin
+from .measure import Measurement, measure_renderables
+from .padding import Padding, PaddingDimensions
+from .segment import Segment
+from .style import StyleType
+from .text import Text, TextType
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderableType, RenderResult
+
+
+class Panel(JupyterMixin):
+    """A console renderable that draws a border around its contents.
+
+    Example:
+        >>> console.print(Panel("Hello, World!"))
+
+    Args:
+        renderable (RenderableType): A console renderable object.
+        box (Box, optional): A Box instance that defines the look of the border (see :ref:`appendix_box`.
+            Defaults to box.ROUNDED.
+        safe_box (bool, optional): Disable box characters that don't display on windows legacy terminal with *raster* fonts. Defaults to True.
+        expand (bool, optional): If True the panel will stretch to fill the console
+            width, otherwise it will be sized to fit the contents. Defaults to True.
+        style (str, optional): The style of the panel (border and contents). Defaults to "none".
+        border_style (str, optional): The style of the border. Defaults to "none".
+        width (Optional[int], optional): Optional width of panel. Defaults to None to auto-detect.
+        height (Optional[int], optional): Optional height of panel. Defaults to None to auto-detect.
+        padding (Optional[PaddingDimensions]): Optional padding around renderable. Defaults to 0.
+        highlight (bool, optional): Enable automatic highlighting of panel title (if str). Defaults to False.
+    """
+
+    def __init__(
+        self,
+        renderable: "RenderableType",
+        box: Box = ROUNDED,
+        *,
+        title: Optional[TextType] = None,
+        title_align: AlignMethod = "center",
+        subtitle: Optional[TextType] = None,
+        subtitle_align: AlignMethod = "center",
+        safe_box: Optional[bool] = None,
+        expand: bool = True,
+        style: StyleType = "none",
+        border_style: StyleType = "none",
+        width: Optional[int] = None,
+        height: Optional[int] = None,
+        padding: PaddingDimensions = (0, 1),
+        highlight: bool = False,
+    ) -> None:
+        self.renderable = renderable
+        self.box = box
+        self.title = title
+        self.title_align: AlignMethod = title_align
+        self.subtitle = subtitle
+        self.subtitle_align = subtitle_align
+        self.safe_box = safe_box
+        self.expand = expand
+        self.style = style
+        self.border_style = border_style
+        self.width = width
+        self.height = height
+        self.padding = padding
+        self.highlight = highlight
+
+    @classmethod
+    def fit(
+        cls,
+        renderable: "RenderableType",
+        box: Box = ROUNDED,
+        *,
+        title: Optional[TextType] = None,
+        title_align: AlignMethod = "center",
+        subtitle: Optional[TextType] = None,
+        subtitle_align: AlignMethod = "center",
+        safe_box: Optional[bool] = None,
+        style: StyleType = "none",
+        border_style: StyleType = "none",
+        width: Optional[int] = None,
+        padding: PaddingDimensions = (0, 1),
+    ) -> "Panel":
+        """An alternative constructor that sets expand=False."""
+        return cls(
+            renderable,
+            box,
+            title=title,
+            title_align=title_align,
+            subtitle=subtitle,
+            subtitle_align=subtitle_align,
+            safe_box=safe_box,
+            style=style,
+            border_style=border_style,
+            width=width,
+            padding=padding,
+            expand=False,
+        )
+
+    @property
+    def _title(self) -> Optional[Text]:
+        if self.title:
+            title_text = (
+                Text.from_markup(self.title)
+                if isinstance(self.title, str)
+                else self.title.copy()
+            )
+            title_text.end = ""
+            title_text.plain = title_text.plain.replace("\n", " ")
+            title_text.no_wrap = True
+            title_text.expand_tabs()
+            title_text.pad(1)
+            return title_text
+        return None
+
+    @property
+    def _subtitle(self) -> Optional[Text]:
+        if self.subtitle:
+            subtitle_text = (
+                Text.from_markup(self.subtitle)
+                if isinstance(self.subtitle, str)
+                else self.subtitle.copy()
+            )
+            subtitle_text.end = ""
+            subtitle_text.plain = subtitle_text.plain.replace("\n", " ")
+            subtitle_text.no_wrap = True
+            subtitle_text.expand_tabs()
+            subtitle_text.pad(1)
+            return subtitle_text
+        return None
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        _padding = Padding.unpack(self.padding)
+        renderable = (
+            Padding(self.renderable, _padding) if any(_padding) else self.renderable
+        )
+        style = console.get_style(self.style)
+        border_style = style + console.get_style(self.border_style)
+        width = (
+            options.max_width
+            if self.width is None
+            else min(options.max_width, self.width)
+        )
+
+        safe_box: bool = console.safe_box if self.safe_box is None else self.safe_box
+        box = self.box.substitute(options, safe=safe_box)
+
+        title_text = self._title
+        if title_text is not None:
+            title_text.style = border_style
+
+        child_width = (
+            width - 2
+            if self.expand
+            else console.measure(
+                renderable, options=options.update_width(width - 2)
+            ).maximum
+        )
+        child_height = self.height or options.height or None
+        if child_height:
+            child_height -= 2
+        if title_text is not None:
+            child_width = min(
+                options.max_width - 2, max(child_width, title_text.cell_len + 2)
+            )
+
+        width = child_width + 2
+        child_options = options.update(
+            width=child_width, height=child_height, highlight=self.highlight
+        )
+        lines = console.render_lines(renderable, child_options, style=style)
+
+        line_start = Segment(box.mid_left, border_style)
+        line_end = Segment(f"{box.mid_right}", border_style)
+        new_line = Segment.line()
+        if title_text is None or width <= 4:
+            yield Segment(box.get_top([width - 2]), border_style)
+        else:
+            title_text.align(self.title_align, width - 4, character=box.top)
+            yield Segment(box.top_left + box.top, border_style)
+            yield from console.render(title_text, child_options.update_width(width - 4))
+            yield Segment(box.top + box.top_right, border_style)
+
+        yield new_line
+        for line in lines:
+            yield line_start
+            yield from line
+            yield line_end
+            yield new_line
+
+        subtitle_text = self._subtitle
+        if subtitle_text is not None:
+            subtitle_text.style = border_style
+
+        if subtitle_text is None or width <= 4:
+            yield Segment(box.get_bottom([width - 2]), border_style)
+        else:
+            subtitle_text.align(self.subtitle_align, width - 4, character=box.bottom)
+            yield Segment(box.bottom_left + box.bottom, border_style)
+            yield from console.render(
+                subtitle_text, child_options.update_width(width - 4)
+            )
+            yield Segment(box.bottom + box.bottom_right, border_style)
+
+        yield new_line
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        _title = self._title
+        _, right, _, left = Padding.unpack(self.padding)
+        padding = left + right
+        renderables = [self.renderable, _title] if _title else [self.renderable]
+
+        if self.width is None:
+            width = (
+                measure_renderables(
+                    console,
+                    options.update_width(options.max_width - padding - 2),
+                    renderables,
+                ).maximum
+                + padding
+                + 2
+            )
+        else:
+            width = self.width
+        return Measurement(width, width)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from .console import Console
+
+    c = Console()
+
+    from .box import DOUBLE, ROUNDED
+    from .padding import Padding
+
+    p = Panel(
+        "Hello, World!",
+        title="rich.Panel",
+        style="white on blue",
+        box=DOUBLE,
+        padding=1,
+    )
+
+    c.print()
+    c.print(p)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/pretty.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/pretty.py
new file mode 100644
index 0000000..4a5ddaa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/pretty.py
@@ -0,0 +1,1010 @@
+import builtins
+import collections
+import dataclasses
+import inspect
+import os
+import sys
+from array import array
+from collections import Counter, UserDict, UserList, defaultdict, deque
+from dataclasses import dataclass, fields, is_dataclass
+from inspect import isclass
+from itertools import islice
+from types import MappingProxyType
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    DefaultDict,
+    Dict,
+    Iterable,
+    List,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Union,
+)
+
+from pip._vendor.rich.repr import RichReprResult
+
+try:
+    import attr as _attr_module
+
+    _has_attrs = True
+except ImportError:  # pragma: no cover
+    _has_attrs = False
+
+from . import get_console
+from ._loop import loop_last
+from ._pick import pick_bool
+from .abc import RichRenderable
+from .cells import cell_len
+from .highlighter import ReprHighlighter
+from .jupyter import JupyterMixin, JupyterRenderable
+from .measure import Measurement
+from .text import Text
+
+if TYPE_CHECKING:
+    from .console import (
+        Console,
+        ConsoleOptions,
+        HighlighterType,
+        JustifyMethod,
+        OverflowMethod,
+        RenderResult,
+    )
+
+
+JUPYTER_CLASSES_TO_NOT_RENDER = {
+    # Matplotlib "Artists" manage their own rendering in a Jupyter notebook, and we should not try to render them too.
+    # "Typically, all [Matplotlib] visible elements in a figure are subclasses of Artist."
+    "matplotlib.artist.Artist",
+}
+
+
+def _is_attr_object(obj: Any) -> bool:
+    """Check if an object was created with attrs module."""
+    return _has_attrs and _attr_module.has(type(obj))
+
+
+def _get_attr_fields(obj: Any) -> Sequence["_attr_module.Attribute[Any]"]:
+    """Get fields for an attrs object."""
+    return _attr_module.fields(type(obj)) if _has_attrs else []
+
+
+def _is_dataclass_repr(obj: object) -> bool:
+    """Check if an instance of a dataclass contains the default repr.
+
+    Args:
+        obj (object): A dataclass instance.
+
+    Returns:
+        bool: True if the default repr is used, False if there is a custom repr.
+    """
+    # Digging in to a lot of internals here
+    # Catching all exceptions in case something is missing on a non CPython implementation
+    try:
+        return obj.__repr__.__code__.co_filename == dataclasses.__file__
+    except Exception:  # pragma: no coverage
+        return False
+
+
+_dummy_namedtuple = collections.namedtuple("_dummy_namedtuple", [])
+
+
+def _has_default_namedtuple_repr(obj: object) -> bool:
+    """Check if an instance of namedtuple contains the default repr
+
+    Args:
+        obj (object): A namedtuple
+
+    Returns:
+        bool: True if the default repr is used, False if there's a custom repr.
+    """
+    obj_file = None
+    try:
+        obj_file = inspect.getfile(obj.__repr__)
+    except (OSError, TypeError):
+        # OSError handles case where object is defined in __main__ scope, e.g. REPL - no filename available.
+        # TypeError trapped defensively, in case of object without filename slips through.
+        pass
+    default_repr_file = inspect.getfile(_dummy_namedtuple.__repr__)
+    return obj_file == default_repr_file
+
+
+def _ipy_display_hook(
+    value: Any,
+    console: Optional["Console"] = None,
+    overflow: "OverflowMethod" = "ignore",
+    crop: bool = False,
+    indent_guides: bool = False,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+    expand_all: bool = False,
+) -> None:
+    # needed here to prevent circular import:
+    from ._inspect import is_object_one_of_types
+    from .console import ConsoleRenderable
+
+    # always skip rich generated jupyter renderables or None values
+    if _safe_isinstance(value, JupyterRenderable) or value is None:
+        return
+
+    console = console or get_console()
+    if console.is_jupyter:
+        # Delegate rendering to IPython if the object (and IPython) supports it
+        #  https://ipython.readthedocs.io/en/stable/config/integrating.html#rich-display
+        ipython_repr_methods = [
+            "_repr_html_",
+            "_repr_markdown_",
+            "_repr_json_",
+            "_repr_latex_",
+            "_repr_jpeg_",
+            "_repr_png_",
+            "_repr_svg_",
+            "_repr_mimebundle_",
+        ]
+        for repr_method in ipython_repr_methods:
+            method = getattr(value, repr_method, None)
+            if inspect.ismethod(method):
+                # Calling the method ourselves isn't ideal. The interface for the `_repr_*_` methods
+                #  specifies that if they return None, then they should not be rendered
+                #  by the notebook.
+                try:
+                    repr_result = method()
+                except Exception:
+                    continue  # If the method raises, treat it as if it doesn't exist, try any others
+                if repr_result is not None:
+                    return  # Delegate rendering to IPython
+
+        # When in a Jupyter notebook let's avoid the display of some specific classes,
+        # as they result in the rendering of useless and noisy lines such as `<Figure size 432x288 with 1 Axes>`.
+        # What does this do?
+        # --> if the class has "matplotlib.artist.Artist" in its hierarchy for example, we don't render it.
+        if is_object_one_of_types(value, JUPYTER_CLASSES_TO_NOT_RENDER):
+            return
+
+    # certain renderables should start on a new line
+    if _safe_isinstance(value, ConsoleRenderable):
+        console.line()
+
+    console.print(
+        value
+        if _safe_isinstance(value, RichRenderable)
+        else Pretty(
+            value,
+            overflow=overflow,
+            indent_guides=indent_guides,
+            max_length=max_length,
+            max_string=max_string,
+            expand_all=expand_all,
+            margin=12,
+        ),
+        crop=crop,
+        new_line_start=True,
+    )
+
+
+def _safe_isinstance(
+    obj: object, class_or_tuple: Union[type, Tuple[type, ...]]
+) -> bool:
+    """isinstance can fail in rare cases, for example types with no __class__"""
+    try:
+        return isinstance(obj, class_or_tuple)
+    except Exception:
+        return False
+
+
+def install(
+    console: Optional["Console"] = None,
+    overflow: "OverflowMethod" = "ignore",
+    crop: bool = False,
+    indent_guides: bool = False,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+    expand_all: bool = False,
+) -> None:
+    """Install automatic pretty printing in the Python REPL.
+
+    Args:
+        console (Console, optional): Console instance or ``None`` to use global console. Defaults to None.
+        overflow (Optional[OverflowMethod], optional): Overflow method. Defaults to "ignore".
+        crop (Optional[bool], optional): Enable cropping of long lines. Defaults to False.
+        indent_guides (bool, optional): Enable indentation guides. Defaults to False.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to None.
+        expand_all (bool, optional): Expand all containers. Defaults to False.
+        max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
+    """
+    from pip._vendor.rich import get_console
+
+    console = console or get_console()
+    assert console is not None
+
+    def display_hook(value: Any) -> None:
+        """Replacement sys.displayhook which prettifies objects with Rich."""
+        if value is not None:
+            assert console is not None
+            builtins._ = None  # type: ignore[attr-defined]
+            console.print(
+                value
+                if _safe_isinstance(value, RichRenderable)
+                else Pretty(
+                    value,
+                    overflow=overflow,
+                    indent_guides=indent_guides,
+                    max_length=max_length,
+                    max_string=max_string,
+                    expand_all=expand_all,
+                ),
+                crop=crop,
+            )
+            builtins._ = value  # type: ignore[attr-defined]
+
+    try:  # pragma: no cover
+        ip = get_ipython()  # type: ignore[name-defined]
+        from IPython.core.formatters import BaseFormatter
+
+        class RichFormatter(BaseFormatter):  # type: ignore[misc]
+            pprint: bool = True
+
+            def __call__(self, value: Any) -> Any:
+                if self.pprint:
+                    return _ipy_display_hook(
+                        value,
+                        console=get_console(),
+                        overflow=overflow,
+                        indent_guides=indent_guides,
+                        max_length=max_length,
+                        max_string=max_string,
+                        expand_all=expand_all,
+                    )
+                else:
+                    return repr(value)
+
+        # replace plain text formatter with rich formatter
+        rich_formatter = RichFormatter()
+        ip.display_formatter.formatters["text/plain"] = rich_formatter
+    except Exception:
+        sys.displayhook = display_hook
+
+
+class Pretty(JupyterMixin):
+    """A rich renderable that pretty prints an object.
+
+    Args:
+        _object (Any): An object to pretty print.
+        highlighter (HighlighterType, optional): Highlighter object to apply to result, or None for ReprHighlighter. Defaults to None.
+        indent_size (int, optional): Number of spaces in indent. Defaults to 4.
+        justify (JustifyMethod, optional): Justify method, or None for default. Defaults to None.
+        overflow (OverflowMethod, optional): Overflow method, or None for default. Defaults to None.
+        no_wrap (Optional[bool], optional): Disable word wrapping. Defaults to False.
+        indent_guides (bool, optional): Enable indentation guides. Defaults to False.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to None.
+        max_depth (int, optional): Maximum depth of nested data structures, or None for no maximum. Defaults to None.
+        expand_all (bool, optional): Expand all containers. Defaults to False.
+        margin (int, optional): Subtrace a margin from width to force containers to expand earlier. Defaults to 0.
+        insert_line (bool, optional): Insert a new line if the output has multiple new lines. Defaults to False.
+    """
+
+    def __init__(
+        self,
+        _object: Any,
+        highlighter: Optional["HighlighterType"] = None,
+        *,
+        indent_size: int = 4,
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        no_wrap: Optional[bool] = False,
+        indent_guides: bool = False,
+        max_length: Optional[int] = None,
+        max_string: Optional[int] = None,
+        max_depth: Optional[int] = None,
+        expand_all: bool = False,
+        margin: int = 0,
+        insert_line: bool = False,
+    ) -> None:
+        self._object = _object
+        self.highlighter = highlighter or ReprHighlighter()
+        self.indent_size = indent_size
+        self.justify: Optional["JustifyMethod"] = justify
+        self.overflow: Optional["OverflowMethod"] = overflow
+        self.no_wrap = no_wrap
+        self.indent_guides = indent_guides
+        self.max_length = max_length
+        self.max_string = max_string
+        self.max_depth = max_depth
+        self.expand_all = expand_all
+        self.margin = margin
+        self.insert_line = insert_line
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        pretty_str = pretty_repr(
+            self._object,
+            max_width=options.max_width - self.margin,
+            indent_size=self.indent_size,
+            max_length=self.max_length,
+            max_string=self.max_string,
+            max_depth=self.max_depth,
+            expand_all=self.expand_all,
+        )
+        pretty_text = Text(
+            pretty_str,
+            justify=self.justify or options.justify,
+            overflow=self.overflow or options.overflow,
+            no_wrap=pick_bool(self.no_wrap, options.no_wrap),
+            style="pretty",
+        )
+        pretty_text = (
+            self.highlighter(pretty_text)
+            if pretty_text
+            else Text(
+                f"{type(self._object)}.__repr__ returned empty string",
+                style="dim italic",
+            )
+        )
+        if self.indent_guides and not options.ascii_only:
+            pretty_text = pretty_text.with_indent_guides(
+                self.indent_size, style="repr.indent"
+            )
+        if self.insert_line and "\n" in pretty_text:
+            yield ""
+        yield pretty_text
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        pretty_str = pretty_repr(
+            self._object,
+            max_width=options.max_width,
+            indent_size=self.indent_size,
+            max_length=self.max_length,
+            max_string=self.max_string,
+            expand_all=self.expand_all,
+        )
+        text_width = (
+            max(cell_len(line) for line in pretty_str.splitlines()) if pretty_str else 0
+        )
+        return Measurement(text_width, text_width)
+
+
+def _get_braces_for_defaultdict(_object: DefaultDict[Any, Any]) -> Tuple[str, str, str]:
+    return (
+        f"defaultdict({_object.default_factory!r}, {{",
+        "})",
+        f"defaultdict({_object.default_factory!r}, {{}})",
+    )
+
+
+def _get_braces_for_array(_object: "array[Any]") -> Tuple[str, str, str]:
+    return (f"array({_object.typecode!r}, [", "])", f"array({_object.typecode!r})")
+
+
+_BRACES: Dict[type, Callable[[Any], Tuple[str, str, str]]] = {
+    os._Environ: lambda _object: ("environ({", "})", "environ({})"),
+    array: _get_braces_for_array,
+    defaultdict: _get_braces_for_defaultdict,
+    Counter: lambda _object: ("Counter({", "})", "Counter()"),
+    deque: lambda _object: ("deque([", "])", "deque()"),
+    dict: lambda _object: ("{", "}", "{}"),
+    UserDict: lambda _object: ("{", "}", "{}"),
+    frozenset: lambda _object: ("frozenset({", "})", "frozenset()"),
+    list: lambda _object: ("[", "]", "[]"),
+    UserList: lambda _object: ("[", "]", "[]"),
+    set: lambda _object: ("{", "}", "set()"),
+    tuple: lambda _object: ("(", ")", "()"),
+    MappingProxyType: lambda _object: ("mappingproxy({", "})", "mappingproxy({})"),
+}
+_CONTAINERS = tuple(_BRACES.keys())
+_MAPPING_CONTAINERS = (dict, os._Environ, MappingProxyType, UserDict)
+
+
+def is_expandable(obj: Any) -> bool:
+    """Check if an object may be expanded by pretty print."""
+    return (
+        _safe_isinstance(obj, _CONTAINERS)
+        or (is_dataclass(obj))
+        or (hasattr(obj, "__rich_repr__"))
+        or _is_attr_object(obj)
+    ) and not isclass(obj)
+
+
+@dataclass
+class Node:
+    """A node in a repr tree. May be atomic or a container."""
+
+    key_repr: str = ""
+    value_repr: str = ""
+    open_brace: str = ""
+    close_brace: str = ""
+    empty: str = ""
+    last: bool = False
+    is_tuple: bool = False
+    is_namedtuple: bool = False
+    children: Optional[List["Node"]] = None
+    key_separator = ": "
+    separator: str = ", "
+
+    def iter_tokens(self) -> Iterable[str]:
+        """Generate tokens for this node."""
+        if self.key_repr:
+            yield self.key_repr
+            yield self.key_separator
+        if self.value_repr:
+            yield self.value_repr
+        elif self.children is not None:
+            if self.children:
+                yield self.open_brace
+                if self.is_tuple and not self.is_namedtuple and len(self.children) == 1:
+                    yield from self.children[0].iter_tokens()
+                    yield ","
+                else:
+                    for child in self.children:
+                        yield from child.iter_tokens()
+                        if not child.last:
+                            yield self.separator
+                yield self.close_brace
+            else:
+                yield self.empty
+
+    def check_length(self, start_length: int, max_length: int) -> bool:
+        """Check the length fits within a limit.
+
+        Args:
+            start_length (int): Starting length of the line (indent, prefix, suffix).
+            max_length (int): Maximum length.
+
+        Returns:
+            bool: True if the node can be rendered within max length, otherwise False.
+        """
+        total_length = start_length
+        for token in self.iter_tokens():
+            total_length += cell_len(token)
+            if total_length > max_length:
+                return False
+        return True
+
+    def __str__(self) -> str:
+        repr_text = "".join(self.iter_tokens())
+        return repr_text
+
+    def render(
+        self, max_width: int = 80, indent_size: int = 4, expand_all: bool = False
+    ) -> str:
+        """Render the node to a pretty repr.
+
+        Args:
+            max_width (int, optional): Maximum width of the repr. Defaults to 80.
+            indent_size (int, optional): Size of indents. Defaults to 4.
+            expand_all (bool, optional): Expand all levels. Defaults to False.
+
+        Returns:
+            str: A repr string of the original object.
+        """
+        lines = [_Line(node=self, is_root=True)]
+        line_no = 0
+        while line_no < len(lines):
+            line = lines[line_no]
+            if line.expandable and not line.expanded:
+                if expand_all or not line.check_length(max_width):
+                    lines[line_no : line_no + 1] = line.expand(indent_size)
+            line_no += 1
+
+        repr_str = "\n".join(str(line) for line in lines)
+        return repr_str
+
+
+@dataclass
+class _Line:
+    """A line in repr output."""
+
+    parent: Optional["_Line"] = None
+    is_root: bool = False
+    node: Optional[Node] = None
+    text: str = ""
+    suffix: str = ""
+    whitespace: str = ""
+    expanded: bool = False
+    last: bool = False
+
+    @property
+    def expandable(self) -> bool:
+        """Check if the line may be expanded."""
+        return bool(self.node is not None and self.node.children)
+
+    def check_length(self, max_length: int) -> bool:
+        """Check this line fits within a given number of cells."""
+        start_length = (
+            len(self.whitespace) + cell_len(self.text) + cell_len(self.suffix)
+        )
+        assert self.node is not None
+        return self.node.check_length(start_length, max_length)
+
+    def expand(self, indent_size: int) -> Iterable["_Line"]:
+        """Expand this line by adding children on their own line."""
+        node = self.node
+        assert node is not None
+        whitespace = self.whitespace
+        assert node.children
+        if node.key_repr:
+            new_line = yield _Line(
+                text=f"{node.key_repr}{node.key_separator}{node.open_brace}",
+                whitespace=whitespace,
+            )
+        else:
+            new_line = yield _Line(text=node.open_brace, whitespace=whitespace)
+        child_whitespace = self.whitespace + " " * indent_size
+        tuple_of_one = node.is_tuple and len(node.children) == 1
+        for last, child in loop_last(node.children):
+            separator = "," if tuple_of_one else node.separator
+            line = _Line(
+                parent=new_line,
+                node=child,
+                whitespace=child_whitespace,
+                suffix=separator,
+                last=last and not tuple_of_one,
+            )
+            yield line
+
+        yield _Line(
+            text=node.close_brace,
+            whitespace=whitespace,
+            suffix=self.suffix,
+            last=self.last,
+        )
+
+    def __str__(self) -> str:
+        if self.last:
+            return f"{self.whitespace}{self.text}{self.node or ''}"
+        else:
+            return (
+                f"{self.whitespace}{self.text}{self.node or ''}{self.suffix.rstrip()}"
+            )
+
+
+def _is_namedtuple(obj: Any) -> bool:
+    """Checks if an object is most likely a namedtuple. It is possible
+    to craft an object that passes this check and isn't a namedtuple, but
+    there is only a minuscule chance of this happening unintentionally.
+
+    Args:
+        obj (Any): The object to test
+
+    Returns:
+        bool: True if the object is a namedtuple. False otherwise.
+    """
+    try:
+        fields = getattr(obj, "_fields", None)
+    except Exception:
+        # Being very defensive - if we cannot get the attr then its not a namedtuple
+        return False
+    return isinstance(obj, tuple) and isinstance(fields, tuple)
+
+
+def traverse(
+    _object: Any,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+    max_depth: Optional[int] = None,
+) -> Node:
+    """Traverse object and generate a tree.
+
+    Args:
+        _object (Any): Object to be traversed.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of string before truncating, or None to disable truncating.
+            Defaults to None.
+        max_depth (int, optional): Maximum depth of data structures, or None for no maximum.
+            Defaults to None.
+
+    Returns:
+        Node: The root of a tree structure which can be used to render a pretty repr.
+    """
+
+    def to_repr(obj: Any) -> str:
+        """Get repr string for an object, but catch errors."""
+        if (
+            max_string is not None
+            and _safe_isinstance(obj, (bytes, str))
+            and len(obj) > max_string
+        ):
+            truncated = len(obj) - max_string
+            obj_repr = f"{obj[:max_string]!r}+{truncated}"
+        else:
+            try:
+                obj_repr = repr(obj)
+            except Exception as error:
+                obj_repr = f"<repr-error {str(error)!r}>"
+        return obj_repr
+
+    visited_ids: Set[int] = set()
+    push_visited = visited_ids.add
+    pop_visited = visited_ids.remove
+
+    def _traverse(obj: Any, root: bool = False, depth: int = 0) -> Node:
+        """Walk the object depth first."""
+
+        obj_type = type(obj)
+        py_version = (sys.version_info.major, sys.version_info.minor)
+        children: List[Node]
+        reached_max_depth = max_depth is not None and depth >= max_depth
+
+        def iter_rich_args(rich_args: Any) -> Iterable[Union[Any, Tuple[str, Any]]]:
+            for arg in rich_args:
+                if _safe_isinstance(arg, tuple):
+                    if len(arg) == 3:
+                        key, child, default = arg
+                        if default == child:
+                            continue
+                        yield key, child
+                    elif len(arg) == 2:
+                        key, child = arg
+                        yield key, child
+                    elif len(arg) == 1:
+                        yield arg[0]
+                else:
+                    yield arg
+
+        try:
+            fake_attributes = hasattr(
+                obj, "awehoi234_wdfjwljet234_234wdfoijsdfmmnxpi492"
+            )
+        except Exception:
+            fake_attributes = False
+
+        rich_repr_result: Optional[RichReprResult] = None
+        if not fake_attributes:
+            try:
+                if hasattr(obj, "__rich_repr__") and not isclass(obj):
+                    rich_repr_result = obj.__rich_repr__()
+            except Exception:
+                pass
+
+        if rich_repr_result is not None:
+            angular = getattr(obj.__rich_repr__, "angular", False)
+            args = list(iter_rich_args(rich_repr_result))
+            class_name = obj.__class__.__name__
+
+            if args:
+                children = []
+                append = children.append
+
+                if reached_max_depth:
+                    node = Node(value_repr=f"...")
+                else:
+                    if angular:
+                        node = Node(
+                            open_brace=f"<{class_name} ",
+                            close_brace=">",
+                            children=children,
+                            last=root,
+                            separator=" ",
+                        )
+                    else:
+                        node = Node(
+                            open_brace=f"{class_name}(",
+                            close_brace=")",
+                            children=children,
+                            last=root,
+                        )
+                    for last, arg in loop_last(args):
+                        if _safe_isinstance(arg, tuple):
+                            key, child = arg
+                            child_node = _traverse(child, depth=depth + 1)
+                            child_node.last = last
+                            child_node.key_repr = key
+                            child_node.key_separator = "="
+                            append(child_node)
+                        else:
+                            child_node = _traverse(arg, depth=depth + 1)
+                            child_node.last = last
+                            append(child_node)
+            else:
+                node = Node(
+                    value_repr=f"<{class_name}>" if angular else f"{class_name}()",
+                    children=[],
+                    last=root,
+                )
+        elif _is_attr_object(obj) and not fake_attributes:
+            children = []
+            append = children.append
+
+            attr_fields = _get_attr_fields(obj)
+            if attr_fields:
+                if reached_max_depth:
+                    node = Node(value_repr=f"...")
+                else:
+                    node = Node(
+                        open_brace=f"{obj.__class__.__name__}(",
+                        close_brace=")",
+                        children=children,
+                        last=root,
+                    )
+
+                    def iter_attrs() -> Iterable[
+                        Tuple[str, Any, Optional[Callable[[Any], str]]]
+                    ]:
+                        """Iterate over attr fields and values."""
+                        for attr in attr_fields:
+                            if attr.repr:
+                                try:
+                                    value = getattr(obj, attr.name)
+                                except Exception as error:
+                                    # Can happen, albeit rarely
+                                    yield (attr.name, error, None)
+                                else:
+                                    yield (
+                                        attr.name,
+                                        value,
+                                        attr.repr if callable(attr.repr) else None,
+                                    )
+
+                    for last, (name, value, repr_callable) in loop_last(iter_attrs()):
+                        if repr_callable:
+                            child_node = Node(value_repr=str(repr_callable(value)))
+                        else:
+                            child_node = _traverse(value, depth=depth + 1)
+                        child_node.last = last
+                        child_node.key_repr = name
+                        child_node.key_separator = "="
+                        append(child_node)
+            else:
+                node = Node(
+                    value_repr=f"{obj.__class__.__name__}()", children=[], last=root
+                )
+
+        elif (
+            is_dataclass(obj)
+            and not _safe_isinstance(obj, type)
+            and not fake_attributes
+            and (_is_dataclass_repr(obj) or py_version == (3, 6))
+        ):
+            obj_id = id(obj)
+            if obj_id in visited_ids:
+                # Recursion detected
+                return Node(value_repr="...")
+            push_visited(obj_id)
+
+            children = []
+            append = children.append
+            if reached_max_depth:
+                node = Node(value_repr=f"...")
+            else:
+                node = Node(
+                    open_brace=f"{obj.__class__.__name__}(",
+                    close_brace=")",
+                    children=children,
+                    last=root,
+                )
+
+                for last, field in loop_last(
+                    field for field in fields(obj) if field.repr
+                ):
+                    child_node = _traverse(getattr(obj, field.name), depth=depth + 1)
+                    child_node.key_repr = field.name
+                    child_node.last = last
+                    child_node.key_separator = "="
+                    append(child_node)
+
+                pop_visited(obj_id)
+        elif _is_namedtuple(obj) and _has_default_namedtuple_repr(obj):
+            if reached_max_depth:
+                node = Node(value_repr="...")
+            else:
+                children = []
+                class_name = obj.__class__.__name__
+                node = Node(
+                    open_brace=f"{class_name}(",
+                    close_brace=")",
+                    children=children,
+                    empty=f"{class_name}()",
+                )
+                append = children.append
+                for last, (key, value) in loop_last(obj._asdict().items()):
+                    child_node = _traverse(value, depth=depth + 1)
+                    child_node.key_repr = key
+                    child_node.last = last
+                    child_node.key_separator = "="
+                    append(child_node)
+        elif _safe_isinstance(obj, _CONTAINERS):
+            for container_type in _CONTAINERS:
+                if _safe_isinstance(obj, container_type):
+                    obj_type = container_type
+                    break
+
+            obj_id = id(obj)
+            if obj_id in visited_ids:
+                # Recursion detected
+                return Node(value_repr="...")
+            push_visited(obj_id)
+
+            open_brace, close_brace, empty = _BRACES[obj_type](obj)
+
+            if reached_max_depth:
+                node = Node(value_repr=f"...", last=root)
+            elif obj_type.__repr__ != type(obj).__repr__:
+                node = Node(value_repr=to_repr(obj), last=root)
+            elif obj:
+                children = []
+                node = Node(
+                    open_brace=open_brace,
+                    close_brace=close_brace,
+                    children=children,
+                    last=root,
+                )
+                append = children.append
+                num_items = len(obj)
+                last_item_index = num_items - 1
+
+                if _safe_isinstance(obj, _MAPPING_CONTAINERS):
+                    iter_items = iter(obj.items())
+                    if max_length is not None:
+                        iter_items = islice(iter_items, max_length)
+                    for index, (key, child) in enumerate(iter_items):
+                        child_node = _traverse(child, depth=depth + 1)
+                        child_node.key_repr = to_repr(key)
+                        child_node.last = index == last_item_index
+                        append(child_node)
+                else:
+                    iter_values = iter(obj)
+                    if max_length is not None:
+                        iter_values = islice(iter_values, max_length)
+                    for index, child in enumerate(iter_values):
+                        child_node = _traverse(child, depth=depth + 1)
+                        child_node.last = index == last_item_index
+                        append(child_node)
+                if max_length is not None and num_items > max_length:
+                    append(Node(value_repr=f"... +{num_items - max_length}", last=True))
+            else:
+                node = Node(empty=empty, children=[], last=root)
+
+            pop_visited(obj_id)
+        else:
+            node = Node(value_repr=to_repr(obj), last=root)
+        node.is_tuple = _safe_isinstance(obj, tuple)
+        node.is_namedtuple = _is_namedtuple(obj)
+        return node
+
+    node = _traverse(_object, root=True)
+    return node
+
+
+def pretty_repr(
+    _object: Any,
+    *,
+    max_width: int = 80,
+    indent_size: int = 4,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+    max_depth: Optional[int] = None,
+    expand_all: bool = False,
+) -> str:
+    """Prettify repr string by expanding on to new lines to fit within a given width.
+
+    Args:
+        _object (Any): Object to repr.
+        max_width (int, optional): Desired maximum width of repr string. Defaults to 80.
+        indent_size (int, optional): Number of spaces to indent. Defaults to 4.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of string before truncating, or None to disable truncating.
+            Defaults to None.
+        max_depth (int, optional): Maximum depth of nested data structure, or None for no depth.
+            Defaults to None.
+        expand_all (bool, optional): Expand all containers regardless of available width. Defaults to False.
+
+    Returns:
+        str: A possibly multi-line representation of the object.
+    """
+
+    if _safe_isinstance(_object, Node):
+        node = _object
+    else:
+        node = traverse(
+            _object, max_length=max_length, max_string=max_string, max_depth=max_depth
+        )
+    repr_str: str = node.render(
+        max_width=max_width, indent_size=indent_size, expand_all=expand_all
+    )
+    return repr_str
+
+
+def pprint(
+    _object: Any,
+    *,
+    console: Optional["Console"] = None,
+    indent_guides: bool = True,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+    max_depth: Optional[int] = None,
+    expand_all: bool = False,
+) -> None:
+    """A convenience function for pretty printing.
+
+    Args:
+        _object (Any): Object to pretty print.
+        console (Console, optional): Console instance, or None to use default. Defaults to None.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of strings before truncating, or None to disable. Defaults to None.
+        max_depth (int, optional): Maximum depth for nested data structures, or None for unlimited depth. Defaults to None.
+        indent_guides (bool, optional): Enable indentation guides. Defaults to True.
+        expand_all (bool, optional): Expand all containers. Defaults to False.
+    """
+    _console = get_console() if console is None else console
+    _console.print(
+        Pretty(
+            _object,
+            max_length=max_length,
+            max_string=max_string,
+            max_depth=max_depth,
+            indent_guides=indent_guides,
+            expand_all=expand_all,
+            overflow="ignore",
+        ),
+        soft_wrap=True,
+    )
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    class BrokenRepr:
+        def __repr__(self) -> str:
+            1 / 0
+            return "this will fail"
+
+    from typing import NamedTuple
+
+    class StockKeepingUnit(NamedTuple):
+        name: str
+        description: str
+        price: float
+        category: str
+        reviews: List[str]
+
+    d = defaultdict(int)
+    d["foo"] = 5
+    data = {
+        "foo": [
+            1,
+            "Hello World!",
+            100.123,
+            323.232,
+            432324.0,
+            {5, 6, 7, (1, 2, 3, 4), 8},
+        ],
+        "bar": frozenset({1, 2, 3}),
+        "defaultdict": defaultdict(
+            list, {"crumble": ["apple", "rhubarb", "butter", "sugar", "flour"]}
+        ),
+        "counter": Counter(
+            [
+                "apple",
+                "orange",
+                "pear",
+                "kumquat",
+                "kumquat",
+                "durian" * 100,
+            ]
+        ),
+        "atomic": (False, True, None),
+        "namedtuple": StockKeepingUnit(
+            "Sparkling British Spring Water",
+            "Carbonated spring water",
+            0.9,
+            "water",
+            ["its amazing!", "its terrible!"],
+        ),
+        "Broken": BrokenRepr(),
+    }
+    data["foo"].append(data)  # type: ignore[attr-defined]
+
+    from pip._vendor.rich import print
+
+    print(Pretty(data, indent_guides=True, max_string=20))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress.py
new file mode 100644
index 0000000..92cfa80
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress.py
@@ -0,0 +1,1703 @@
+import io
+import sys
+import typing
+import warnings
+from abc import ABC, abstractmethod
+from collections import deque
+from collections.abc import Sized
+from dataclasses import dataclass, field
+from datetime import timedelta
+from io import RawIOBase, UnsupportedOperation
+from math import ceil
+from mmap import mmap
+from os import PathLike, stat
+from threading import Event, RLock, Thread
+from types import TracebackType
+from typing import (
+    Any,
+    BinaryIO,
+    Callable,
+    ContextManager,
+    Deque,
+    Dict,
+    Generic,
+    Iterable,
+    List,
+    NamedTuple,
+    NewType,
+    Optional,
+    Sequence,
+    TextIO,
+    Tuple,
+    Type,
+    TypeVar,
+    Union,
+)
+
+if sys.version_info >= (3, 8):
+    from typing import Literal
+else:
+    from pip._vendor.typing_extensions import Literal  # pragma: no cover
+
+from . import filesize, get_console
+from .console import Console, Group, JustifyMethod, RenderableType
+from .highlighter import Highlighter
+from .jupyter import JupyterMixin
+from .live import Live
+from .progress_bar import ProgressBar
+from .spinner import Spinner
+from .style import StyleType
+from .table import Column, Table
+from .text import Text, TextType
+
+TaskID = NewType("TaskID", int)
+
+ProgressType = TypeVar("ProgressType")
+
+GetTimeCallable = Callable[[], float]
+
+
+_I = typing.TypeVar("_I", TextIO, BinaryIO)
+
+
+class _TrackThread(Thread):
+    """A thread to periodically update progress."""
+
+    def __init__(self, progress: "Progress", task_id: "TaskID", update_period: float):
+        self.progress = progress
+        self.task_id = task_id
+        self.update_period = update_period
+        self.done = Event()
+
+        self.completed = 0
+        super().__init__()
+
+    def run(self) -> None:
+        task_id = self.task_id
+        advance = self.progress.advance
+        update_period = self.update_period
+        last_completed = 0
+        wait = self.done.wait
+        while not wait(update_period):
+            completed = self.completed
+            if last_completed != completed:
+                advance(task_id, completed - last_completed)
+                last_completed = completed
+
+        self.progress.update(self.task_id, completed=self.completed, refresh=True)
+
+    def __enter__(self) -> "_TrackThread":
+        self.start()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.done.set()
+        self.join()
+
+
+def track(
+    sequence: Union[Sequence[ProgressType], Iterable[ProgressType]],
+    description: str = "Working...",
+    total: Optional[float] = None,
+    auto_refresh: bool = True,
+    console: Optional[Console] = None,
+    transient: bool = False,
+    get_time: Optional[Callable[[], float]] = None,
+    refresh_per_second: float = 10,
+    style: StyleType = "bar.back",
+    complete_style: StyleType = "bar.complete",
+    finished_style: StyleType = "bar.finished",
+    pulse_style: StyleType = "bar.pulse",
+    update_period: float = 0.1,
+    disable: bool = False,
+    show_speed: bool = True,
+) -> Iterable[ProgressType]:
+    """Track progress by iterating over a sequence.
+
+    Args:
+        sequence (Iterable[ProgressType]): A sequence (must support "len") you wish to iterate over.
+        description (str, optional): Description of task show next to progress bar. Defaults to "Working".
+        total: (float, optional): Total number of steps. Default is len(sequence).
+        auto_refresh (bool, optional): Automatic refresh, disable to force a refresh after each iteration. Default is True.
+        transient: (bool, optional): Clear the progress on exit. Defaults to False.
+        console (Console, optional): Console to write to. Default creates internal Console instance.
+        refresh_per_second (float): Number of times per second to refresh the progress information. Defaults to 10.
+        style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
+        complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
+        finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.done".
+        pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
+        update_period (float, optional): Minimum time (in seconds) between calls to update(). Defaults to 0.1.
+        disable (bool, optional): Disable display of progress.
+        show_speed (bool, optional): Show speed if total isn't known. Defaults to True.
+    Returns:
+        Iterable[ProgressType]: An iterable of the values in the sequence.
+
+    """
+
+    columns: List["ProgressColumn"] = (
+        [TextColumn("[progress.description]{task.description}")] if description else []
+    )
+    columns.extend(
+        (
+            BarColumn(
+                style=style,
+                complete_style=complete_style,
+                finished_style=finished_style,
+                pulse_style=pulse_style,
+            ),
+            TaskProgressColumn(show_speed=show_speed),
+            TimeRemainingColumn(),
+        )
+    )
+    progress = Progress(
+        *columns,
+        auto_refresh=auto_refresh,
+        console=console,
+        transient=transient,
+        get_time=get_time,
+        refresh_per_second=refresh_per_second or 10,
+        disable=disable,
+    )
+
+    with progress:
+        yield from progress.track(
+            sequence, total=total, description=description, update_period=update_period
+        )
+
+
+class _Reader(RawIOBase, BinaryIO):
+    """A reader that tracks progress while it's being read from."""
+
+    def __init__(
+        self,
+        handle: BinaryIO,
+        progress: "Progress",
+        task: TaskID,
+        close_handle: bool = True,
+    ) -> None:
+        self.handle = handle
+        self.progress = progress
+        self.task = task
+        self.close_handle = close_handle
+        self._closed = False
+
+    def __enter__(self) -> "_Reader":
+        self.handle.__enter__()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.close()
+
+    def __iter__(self) -> BinaryIO:
+        return self
+
+    def __next__(self) -> bytes:
+        line = next(self.handle)
+        self.progress.advance(self.task, advance=len(line))
+        return line
+
+    @property
+    def closed(self) -> bool:
+        return self._closed
+
+    def fileno(self) -> int:
+        return self.handle.fileno()
+
+    def isatty(self) -> bool:
+        return self.handle.isatty()
+
+    @property
+    def name(self) -> str:
+        return self.handle.name
+
+    def readable(self) -> bool:
+        return self.handle.readable()
+
+    def seekable(self) -> bool:
+        return self.handle.seekable()
+
+    def writable(self) -> bool:
+        return False
+
+    def read(self, size: int = -1) -> bytes:
+        block = self.handle.read(size)
+        self.progress.advance(self.task, advance=len(block))
+        return block
+
+    def readinto(self, b: Union[bytearray, memoryview, mmap]):  # type: ignore[no-untyped-def, override]
+        n = self.handle.readinto(b)  # type: ignore[attr-defined]
+        self.progress.advance(self.task, advance=n)
+        return n
+
+    def readline(self, size: int = -1) -> bytes:  # type: ignore[override]
+        line = self.handle.readline(size)
+        self.progress.advance(self.task, advance=len(line))
+        return line
+
+    def readlines(self, hint: int = -1) -> List[bytes]:
+        lines = self.handle.readlines(hint)
+        self.progress.advance(self.task, advance=sum(map(len, lines)))
+        return lines
+
+    def close(self) -> None:
+        if self.close_handle:
+            self.handle.close()
+        self._closed = True
+
+    def seek(self, offset: int, whence: int = 0) -> int:
+        pos = self.handle.seek(offset, whence)
+        self.progress.update(self.task, completed=pos)
+        return pos
+
+    def tell(self) -> int:
+        return self.handle.tell()
+
+    def write(self, s: Any) -> int:
+        raise UnsupportedOperation("write")
+
+
+class _ReadContext(ContextManager[_I], Generic[_I]):
+    """A utility class to handle a context for both a reader and a progress."""
+
+    def __init__(self, progress: "Progress", reader: _I) -> None:
+        self.progress = progress
+        self.reader: _I = reader
+
+    def __enter__(self) -> _I:
+        self.progress.start()
+        return self.reader.__enter__()
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.progress.stop()
+        self.reader.__exit__(exc_type, exc_val, exc_tb)
+
+
+def wrap_file(
+    file: BinaryIO,
+    total: int,
+    *,
+    description: str = "Reading...",
+    auto_refresh: bool = True,
+    console: Optional[Console] = None,
+    transient: bool = False,
+    get_time: Optional[Callable[[], float]] = None,
+    refresh_per_second: float = 10,
+    style: StyleType = "bar.back",
+    complete_style: StyleType = "bar.complete",
+    finished_style: StyleType = "bar.finished",
+    pulse_style: StyleType = "bar.pulse",
+    disable: bool = False,
+) -> ContextManager[BinaryIO]:
+    """Read bytes from a file while tracking progress.
+
+    Args:
+        file (Union[str, PathLike[str], BinaryIO]): The path to the file to read, or a file-like object in binary mode.
+        total (int): Total number of bytes to read.
+        description (str, optional): Description of task show next to progress bar. Defaults to "Reading".
+        auto_refresh (bool, optional): Automatic refresh, disable to force a refresh after each iteration. Default is True.
+        transient: (bool, optional): Clear the progress on exit. Defaults to False.
+        console (Console, optional): Console to write to. Default creates internal Console instance.
+        refresh_per_second (float): Number of times per second to refresh the progress information. Defaults to 10.
+        style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
+        complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
+        finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.done".
+        pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
+        disable (bool, optional): Disable display of progress.
+    Returns:
+        ContextManager[BinaryIO]: A context manager yielding a progress reader.
+
+    """
+
+    columns: List["ProgressColumn"] = (
+        [TextColumn("[progress.description]{task.description}")] if description else []
+    )
+    columns.extend(
+        (
+            BarColumn(
+                style=style,
+                complete_style=complete_style,
+                finished_style=finished_style,
+                pulse_style=pulse_style,
+            ),
+            DownloadColumn(),
+            TimeRemainingColumn(),
+        )
+    )
+    progress = Progress(
+        *columns,
+        auto_refresh=auto_refresh,
+        console=console,
+        transient=transient,
+        get_time=get_time,
+        refresh_per_second=refresh_per_second or 10,
+        disable=disable,
+    )
+
+    reader = progress.wrap_file(file, total=total, description=description)
+    return _ReadContext(progress, reader)
+
+
+@typing.overload
+def open(
+    file: Union[str, "PathLike[str]", bytes],
+    mode: Union[Literal["rt"], Literal["r"]],
+    buffering: int = -1,
+    encoding: Optional[str] = None,
+    errors: Optional[str] = None,
+    newline: Optional[str] = None,
+    *,
+    total: Optional[int] = None,
+    description: str = "Reading...",
+    auto_refresh: bool = True,
+    console: Optional[Console] = None,
+    transient: bool = False,
+    get_time: Optional[Callable[[], float]] = None,
+    refresh_per_second: float = 10,
+    style: StyleType = "bar.back",
+    complete_style: StyleType = "bar.complete",
+    finished_style: StyleType = "bar.finished",
+    pulse_style: StyleType = "bar.pulse",
+    disable: bool = False,
+) -> ContextManager[TextIO]:
+    pass
+
+
+@typing.overload
+def open(
+    file: Union[str, "PathLike[str]", bytes],
+    mode: Literal["rb"],
+    buffering: int = -1,
+    encoding: Optional[str] = None,
+    errors: Optional[str] = None,
+    newline: Optional[str] = None,
+    *,
+    total: Optional[int] = None,
+    description: str = "Reading...",
+    auto_refresh: bool = True,
+    console: Optional[Console] = None,
+    transient: bool = False,
+    get_time: Optional[Callable[[], float]] = None,
+    refresh_per_second: float = 10,
+    style: StyleType = "bar.back",
+    complete_style: StyleType = "bar.complete",
+    finished_style: StyleType = "bar.finished",
+    pulse_style: StyleType = "bar.pulse",
+    disable: bool = False,
+) -> ContextManager[BinaryIO]:
+    pass
+
+
+def open(
+    file: Union[str, "PathLike[str]", bytes],
+    mode: Union[Literal["rb"], Literal["rt"], Literal["r"]] = "r",
+    buffering: int = -1,
+    encoding: Optional[str] = None,
+    errors: Optional[str] = None,
+    newline: Optional[str] = None,
+    *,
+    total: Optional[int] = None,
+    description: str = "Reading...",
+    auto_refresh: bool = True,
+    console: Optional[Console] = None,
+    transient: bool = False,
+    get_time: Optional[Callable[[], float]] = None,
+    refresh_per_second: float = 10,
+    style: StyleType = "bar.back",
+    complete_style: StyleType = "bar.complete",
+    finished_style: StyleType = "bar.finished",
+    pulse_style: StyleType = "bar.pulse",
+    disable: bool = False,
+) -> Union[ContextManager[BinaryIO], ContextManager[TextIO]]:
+    """Read bytes from a file while tracking progress.
+
+    Args:
+        path (Union[str, PathLike[str], BinaryIO]): The path to the file to read, or a file-like object in binary mode.
+        mode (str): The mode to use to open the file. Only supports "r", "rb" or "rt".
+        buffering (int): The buffering strategy to use, see :func:`io.open`.
+        encoding (str, optional): The encoding to use when reading in text mode, see :func:`io.open`.
+        errors (str, optional): The error handling strategy for decoding errors, see :func:`io.open`.
+        newline (str, optional): The strategy for handling newlines in text mode, see :func:`io.open`
+        total: (int, optional): Total number of bytes to read. Must be provided if reading from a file handle. Default for a path is os.stat(file).st_size.
+        description (str, optional): Description of task show next to progress bar. Defaults to "Reading".
+        auto_refresh (bool, optional): Automatic refresh, disable to force a refresh after each iteration. Default is True.
+        transient: (bool, optional): Clear the progress on exit. Defaults to False.
+        console (Console, optional): Console to write to. Default creates internal Console instance.
+        refresh_per_second (float): Number of times per second to refresh the progress information. Defaults to 10.
+        style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
+        complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
+        finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.done".
+        pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
+        disable (bool, optional): Disable display of progress.
+        encoding (str, optional): The encoding to use when reading in text mode.
+
+    Returns:
+        ContextManager[BinaryIO]: A context manager yielding a progress reader.
+
+    """
+
+    columns: List["ProgressColumn"] = (
+        [TextColumn("[progress.description]{task.description}")] if description else []
+    )
+    columns.extend(
+        (
+            BarColumn(
+                style=style,
+                complete_style=complete_style,
+                finished_style=finished_style,
+                pulse_style=pulse_style,
+            ),
+            DownloadColumn(),
+            TimeRemainingColumn(),
+        )
+    )
+    progress = Progress(
+        *columns,
+        auto_refresh=auto_refresh,
+        console=console,
+        transient=transient,
+        get_time=get_time,
+        refresh_per_second=refresh_per_second or 10,
+        disable=disable,
+    )
+
+    reader = progress.open(
+        file,
+        mode=mode,
+        buffering=buffering,
+        encoding=encoding,
+        errors=errors,
+        newline=newline,
+        total=total,
+        description=description,
+    )
+    return _ReadContext(progress, reader)  # type: ignore[return-value, type-var]
+
+
+class ProgressColumn(ABC):
+    """Base class for a widget to use in progress display."""
+
+    max_refresh: Optional[float] = None
+
+    def __init__(self, table_column: Optional[Column] = None) -> None:
+        self._table_column = table_column
+        self._renderable_cache: Dict[TaskID, Tuple[float, RenderableType]] = {}
+        self._update_time: Optional[float] = None
+
+    def get_table_column(self) -> Column:
+        """Get a table column, used to build tasks table."""
+        return self._table_column or Column()
+
+    def __call__(self, task: "Task") -> RenderableType:
+        """Called by the Progress object to return a renderable for the given task.
+
+        Args:
+            task (Task): An object containing information regarding the task.
+
+        Returns:
+            RenderableType: Anything renderable (including str).
+        """
+        current_time = task.get_time()
+        if self.max_refresh is not None and not task.completed:
+            try:
+                timestamp, renderable = self._renderable_cache[task.id]
+            except KeyError:
+                pass
+            else:
+                if timestamp + self.max_refresh > current_time:
+                    return renderable
+
+        renderable = self.render(task)
+        self._renderable_cache[task.id] = (current_time, renderable)
+        return renderable
+
+    @abstractmethod
+    def render(self, task: "Task") -> RenderableType:
+        """Should return a renderable object."""
+
+
+class RenderableColumn(ProgressColumn):
+    """A column to insert an arbitrary column.
+
+    Args:
+        renderable (RenderableType, optional): Any renderable. Defaults to empty string.
+    """
+
+    def __init__(
+        self, renderable: RenderableType = "", *, table_column: Optional[Column] = None
+    ):
+        self.renderable = renderable
+        super().__init__(table_column=table_column)
+
+    def render(self, task: "Task") -> RenderableType:
+        return self.renderable
+
+
+class SpinnerColumn(ProgressColumn):
+    """A column with a 'spinner' animation.
+
+    Args:
+        spinner_name (str, optional): Name of spinner animation. Defaults to "dots".
+        style (StyleType, optional): Style of spinner. Defaults to "progress.spinner".
+        speed (float, optional): Speed factor of spinner. Defaults to 1.0.
+        finished_text (TextType, optional): Text used when task is finished. Defaults to " ".
+    """
+
+    def __init__(
+        self,
+        spinner_name: str = "dots",
+        style: Optional[StyleType] = "progress.spinner",
+        speed: float = 1.0,
+        finished_text: TextType = " ",
+        table_column: Optional[Column] = None,
+    ):
+        self.spinner = Spinner(spinner_name, style=style, speed=speed)
+        self.finished_text = (
+            Text.from_markup(finished_text)
+            if isinstance(finished_text, str)
+            else finished_text
+        )
+        super().__init__(table_column=table_column)
+
+    def set_spinner(
+        self,
+        spinner_name: str,
+        spinner_style: Optional[StyleType] = "progress.spinner",
+        speed: float = 1.0,
+    ) -> None:
+        """Set a new spinner.
+
+        Args:
+            spinner_name (str): Spinner name, see python -m rich.spinner.
+            spinner_style (Optional[StyleType], optional): Spinner style. Defaults to "progress.spinner".
+            speed (float, optional): Speed factor of spinner. Defaults to 1.0.
+        """
+        self.spinner = Spinner(spinner_name, style=spinner_style, speed=speed)
+
+    def render(self, task: "Task") -> RenderableType:
+        text = (
+            self.finished_text
+            if task.finished
+            else self.spinner.render(task.get_time())
+        )
+        return text
+
+
+class TextColumn(ProgressColumn):
+    """A column containing text."""
+
+    def __init__(
+        self,
+        text_format: str,
+        style: StyleType = "none",
+        justify: JustifyMethod = "left",
+        markup: bool = True,
+        highlighter: Optional[Highlighter] = None,
+        table_column: Optional[Column] = None,
+    ) -> None:
+        self.text_format = text_format
+        self.justify: JustifyMethod = justify
+        self.style = style
+        self.markup = markup
+        self.highlighter = highlighter
+        super().__init__(table_column=table_column or Column(no_wrap=True))
+
+    def render(self, task: "Task") -> Text:
+        _text = self.text_format.format(task=task)
+        if self.markup:
+            text = Text.from_markup(_text, style=self.style, justify=self.justify)
+        else:
+            text = Text(_text, style=self.style, justify=self.justify)
+        if self.highlighter:
+            self.highlighter.highlight(text)
+        return text
+
+
+class BarColumn(ProgressColumn):
+    """Renders a visual progress bar.
+
+    Args:
+        bar_width (Optional[int], optional): Width of bar or None for full width. Defaults to 40.
+        style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
+        complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
+        finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.done".
+        pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
+    """
+
+    def __init__(
+        self,
+        bar_width: Optional[int] = 40,
+        style: StyleType = "bar.back",
+        complete_style: StyleType = "bar.complete",
+        finished_style: StyleType = "bar.finished",
+        pulse_style: StyleType = "bar.pulse",
+        table_column: Optional[Column] = None,
+    ) -> None:
+        self.bar_width = bar_width
+        self.style = style
+        self.complete_style = complete_style
+        self.finished_style = finished_style
+        self.pulse_style = pulse_style
+        super().__init__(table_column=table_column)
+
+    def render(self, task: "Task") -> ProgressBar:
+        """Gets a progress bar widget for a task."""
+        return ProgressBar(
+            total=max(0, task.total) if task.total is not None else None,
+            completed=max(0, task.completed),
+            width=None if self.bar_width is None else max(1, self.bar_width),
+            pulse=not task.started,
+            animation_time=task.get_time(),
+            style=self.style,
+            complete_style=self.complete_style,
+            finished_style=self.finished_style,
+            pulse_style=self.pulse_style,
+        )
+
+
+class TimeElapsedColumn(ProgressColumn):
+    """Renders time elapsed."""
+
+    def render(self, task: "Task") -> Text:
+        """Show time remaining."""
+        elapsed = task.finished_time if task.finished else task.elapsed
+        if elapsed is None:
+            return Text("-:--:--", style="progress.elapsed")
+        delta = timedelta(seconds=int(elapsed))
+        return Text(str(delta), style="progress.elapsed")
+
+
+class TaskProgressColumn(TextColumn):
+    """Show task progress as a percentage.
+
+    Args:
+        text_format (str, optional): Format for percentage display. Defaults to "[progress.percentage]{task.percentage:>3.0f}%".
+        text_format_no_percentage (str, optional): Format if percentage is unknown. Defaults to "".
+        style (StyleType, optional): Style of output. Defaults to "none".
+        justify (JustifyMethod, optional): Text justification. Defaults to "left".
+        markup (bool, optional): Enable markup. Defaults to True.
+        highlighter (Optional[Highlighter], optional): Highlighter to apply to output. Defaults to None.
+        table_column (Optional[Column], optional): Table Column to use. Defaults to None.
+        show_speed (bool, optional): Show speed if total is unknown. Defaults to False.
+    """
+
+    def __init__(
+        self,
+        text_format: str = "[progress.percentage]{task.percentage:>3.0f}%",
+        text_format_no_percentage: str = "",
+        style: StyleType = "none",
+        justify: JustifyMethod = "left",
+        markup: bool = True,
+        highlighter: Optional[Highlighter] = None,
+        table_column: Optional[Column] = None,
+        show_speed: bool = False,
+    ) -> None:
+
+        self.text_format_no_percentage = text_format_no_percentage
+        self.show_speed = show_speed
+        super().__init__(
+            text_format=text_format,
+            style=style,
+            justify=justify,
+            markup=markup,
+            highlighter=highlighter,
+            table_column=table_column,
+        )
+
+    @classmethod
+    def render_speed(cls, speed: Optional[float]) -> Text:
+        """Render the speed in iterations per second.
+
+        Args:
+            task (Task): A Task object.
+
+        Returns:
+            Text: Text object containing the task speed.
+        """
+        if speed is None:
+            return Text("", style="progress.percentage")
+        unit, suffix = filesize.pick_unit_and_suffix(
+            int(speed),
+            ["", "×10³", "×10⁶", "×10⁹", "×10¹²"],
+            1000,
+        )
+        data_speed = speed / unit
+        return Text(f"{data_speed:.1f}{suffix} it/s", style="progress.percentage")
+
+    def render(self, task: "Task") -> Text:
+        if task.total is None and self.show_speed:
+            return self.render_speed(task.finished_speed or task.speed)
+        text_format = (
+            self.text_format_no_percentage if task.total is None else self.text_format
+        )
+        _text = text_format.format(task=task)
+        if self.markup:
+            text = Text.from_markup(_text, style=self.style, justify=self.justify)
+        else:
+            text = Text(_text, style=self.style, justify=self.justify)
+        if self.highlighter:
+            self.highlighter.highlight(text)
+        return text
+
+
+class TimeRemainingColumn(ProgressColumn):
+    """Renders estimated time remaining.
+
+    Args:
+        compact (bool, optional): Render MM:SS when time remaining is less than an hour. Defaults to False.
+        elapsed_when_finished (bool, optional): Render time elapsed when the task is finished. Defaults to False.
+    """
+
+    # Only refresh twice a second to prevent jitter
+    max_refresh = 0.5
+
+    def __init__(
+        self,
+        compact: bool = False,
+        elapsed_when_finished: bool = False,
+        table_column: Optional[Column] = None,
+    ):
+        self.compact = compact
+        self.elapsed_when_finished = elapsed_when_finished
+        super().__init__(table_column=table_column)
+
+    def render(self, task: "Task") -> Text:
+        """Show time remaining."""
+        if self.elapsed_when_finished and task.finished:
+            task_time = task.finished_time
+            style = "progress.elapsed"
+        else:
+            task_time = task.time_remaining
+            style = "progress.remaining"
+
+        if task.total is None:
+            return Text("", style=style)
+
+        if task_time is None:
+            return Text("--:--" if self.compact else "-:--:--", style=style)
+
+        # Based on https://github.com/tqdm/tqdm/blob/master/tqdm/std.py
+        minutes, seconds = divmod(int(task_time), 60)
+        hours, minutes = divmod(minutes, 60)
+
+        if self.compact and not hours:
+            formatted = f"{minutes:02d}:{seconds:02d}"
+        else:
+            formatted = f"{hours:d}:{minutes:02d}:{seconds:02d}"
+
+        return Text(formatted, style=style)
+
+
+class FileSizeColumn(ProgressColumn):
+    """Renders completed filesize."""
+
+    def render(self, task: "Task") -> Text:
+        """Show data completed."""
+        data_size = filesize.decimal(int(task.completed))
+        return Text(data_size, style="progress.filesize")
+
+
+class TotalFileSizeColumn(ProgressColumn):
+    """Renders total filesize."""
+
+    def render(self, task: "Task") -> Text:
+        """Show data completed."""
+        data_size = filesize.decimal(int(task.total)) if task.total is not None else ""
+        return Text(data_size, style="progress.filesize.total")
+
+
+class MofNCompleteColumn(ProgressColumn):
+    """Renders completed count/total, e.g. '  10/1000'.
+
+    Best for bounded tasks with int quantities.
+
+    Space pads the completed count so that progress length does not change as task progresses
+    past powers of 10.
+
+    Args:
+        separator (str, optional): Text to separate completed and total values. Defaults to "/".
+    """
+
+    def __init__(self, separator: str = "/", table_column: Optional[Column] = None):
+        self.separator = separator
+        super().__init__(table_column=table_column)
+
+    def render(self, task: "Task") -> Text:
+        """Show completed/total."""
+        completed = int(task.completed)
+        total = int(task.total) if task.total is not None else "?"
+        total_width = len(str(total))
+        return Text(
+            f"{completed:{total_width}d}{self.separator}{total}",
+            style="progress.download",
+        )
+
+
+class DownloadColumn(ProgressColumn):
+    """Renders file size downloaded and total, e.g. '0.5/2.3 GB'.
+
+    Args:
+        binary_units (bool, optional): Use binary units, KiB, MiB etc. Defaults to False.
+    """
+
+    def __init__(
+        self, binary_units: bool = False, table_column: Optional[Column] = None
+    ) -> None:
+        self.binary_units = binary_units
+        super().__init__(table_column=table_column)
+
+    def render(self, task: "Task") -> Text:
+        """Calculate common unit for completed and total."""
+        completed = int(task.completed)
+
+        unit_and_suffix_calculation_base = (
+            int(task.total) if task.total is not None else completed
+        )
+        if self.binary_units:
+            unit, suffix = filesize.pick_unit_and_suffix(
+                unit_and_suffix_calculation_base,
+                ["bytes", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"],
+                1024,
+            )
+        else:
+            unit, suffix = filesize.pick_unit_and_suffix(
+                unit_and_suffix_calculation_base,
+                ["bytes", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"],
+                1000,
+            )
+        precision = 0 if unit == 1 else 1
+
+        completed_ratio = completed / unit
+        completed_str = f"{completed_ratio:,.{precision}f}"
+
+        if task.total is not None:
+            total = int(task.total)
+            total_ratio = total / unit
+            total_str = f"{total_ratio:,.{precision}f}"
+        else:
+            total_str = "?"
+
+        download_status = f"{completed_str}/{total_str} {suffix}"
+        download_text = Text(download_status, style="progress.download")
+        return download_text
+
+
+class TransferSpeedColumn(ProgressColumn):
+    """Renders human readable transfer speed."""
+
+    def render(self, task: "Task") -> Text:
+        """Show data transfer speed."""
+        speed = task.finished_speed or task.speed
+        if speed is None:
+            return Text("?", style="progress.data.speed")
+        data_speed = filesize.decimal(int(speed))
+        return Text(f"{data_speed}/s", style="progress.data.speed")
+
+
+class ProgressSample(NamedTuple):
+    """Sample of progress for a given time."""
+
+    timestamp: float
+    """Timestamp of sample."""
+    completed: float
+    """Number of steps completed."""
+
+
+@dataclass
+class Task:
+    """Information regarding a progress task.
+
+    This object should be considered read-only outside of the :class:`~Progress` class.
+
+    """
+
+    id: TaskID
+    """Task ID associated with this task (used in Progress methods)."""
+
+    description: str
+    """str: Description of the task."""
+
+    total: Optional[float]
+    """Optional[float]: Total number of steps in this task."""
+
+    completed: float
+    """float: Number of steps completed"""
+
+    _get_time: GetTimeCallable
+    """Callable to get the current time."""
+
+    finished_time: Optional[float] = None
+    """float: Time task was finished."""
+
+    visible: bool = True
+    """bool: Indicates if this task is visible in the progress display."""
+
+    fields: Dict[str, Any] = field(default_factory=dict)
+    """dict: Arbitrary fields passed in via Progress.update."""
+
+    start_time: Optional[float] = field(default=None, init=False, repr=False)
+    """Optional[float]: Time this task was started, or None if not started."""
+
+    stop_time: Optional[float] = field(default=None, init=False, repr=False)
+    """Optional[float]: Time this task was stopped, or None if not stopped."""
+
+    finished_speed: Optional[float] = None
+    """Optional[float]: The last speed for a finished task."""
+
+    _progress: Deque[ProgressSample] = field(
+        default_factory=lambda: deque(maxlen=1000), init=False, repr=False
+    )
+
+    _lock: RLock = field(repr=False, default_factory=RLock)
+    """Thread lock."""
+
+    def get_time(self) -> float:
+        """float: Get the current time, in seconds."""
+        return self._get_time()
+
+    @property
+    def started(self) -> bool:
+        """bool: Check if the task as started."""
+        return self.start_time is not None
+
+    @property
+    def remaining(self) -> Optional[float]:
+        """Optional[float]: Get the number of steps remaining, if a non-None total was set."""
+        if self.total is None:
+            return None
+        return self.total - self.completed
+
+    @property
+    def elapsed(self) -> Optional[float]:
+        """Optional[float]: Time elapsed since task was started, or ``None`` if the task hasn't started."""
+        if self.start_time is None:
+            return None
+        if self.stop_time is not None:
+            return self.stop_time - self.start_time
+        return self.get_time() - self.start_time
+
+    @property
+    def finished(self) -> bool:
+        """Check if the task has finished."""
+        return self.finished_time is not None
+
+    @property
+    def percentage(self) -> float:
+        """float: Get progress of task as a percentage. If a None total was set, returns 0"""
+        if not self.total:
+            return 0.0
+        completed = (self.completed / self.total) * 100.0
+        completed = min(100.0, max(0.0, completed))
+        return completed
+
+    @property
+    def speed(self) -> Optional[float]:
+        """Optional[float]: Get the estimated speed in steps per second."""
+        if self.start_time is None:
+            return None
+        with self._lock:
+            progress = self._progress
+            if not progress:
+                return None
+            total_time = progress[-1].timestamp - progress[0].timestamp
+            if total_time == 0:
+                return None
+            iter_progress = iter(progress)
+            next(iter_progress)
+            total_completed = sum(sample.completed for sample in iter_progress)
+            speed = total_completed / total_time
+            return speed
+
+    @property
+    def time_remaining(self) -> Optional[float]:
+        """Optional[float]: Get estimated time to completion, or ``None`` if no data."""
+        if self.finished:
+            return 0.0
+        speed = self.speed
+        if not speed:
+            return None
+        remaining = self.remaining
+        if remaining is None:
+            return None
+        estimate = ceil(remaining / speed)
+        return estimate
+
+    def _reset(self) -> None:
+        """Reset progress."""
+        self._progress.clear()
+        self.finished_time = None
+        self.finished_speed = None
+
+
+class Progress(JupyterMixin):
+    """Renders an auto-updating progress bar(s).
+
+    Args:
+        console (Console, optional): Optional Console instance. Default will an internal Console instance writing to stdout.
+        auto_refresh (bool, optional): Enable auto refresh. If disabled, you will need to call `refresh()`.
+        refresh_per_second (Optional[float], optional): Number of times per second to refresh the progress information or None to use default (10). Defaults to None.
+        speed_estimate_period: (float, optional): Period (in seconds) used to calculate the speed estimate. Defaults to 30.
+        transient: (bool, optional): Clear the progress on exit. Defaults to False.
+        redirect_stdout: (bool, optional): Enable redirection of stdout, so ``print`` may be used. Defaults to True.
+        redirect_stderr: (bool, optional): Enable redirection of stderr. Defaults to True.
+        get_time: (Callable, optional): A callable that gets the current time, or None to use Console.get_time. Defaults to None.
+        disable (bool, optional): Disable progress display. Defaults to False
+        expand (bool, optional): Expand tasks table to fit width. Defaults to False.
+    """
+
+    def __init__(
+        self,
+        *columns: Union[str, ProgressColumn],
+        console: Optional[Console] = None,
+        auto_refresh: bool = True,
+        refresh_per_second: float = 10,
+        speed_estimate_period: float = 30.0,
+        transient: bool = False,
+        redirect_stdout: bool = True,
+        redirect_stderr: bool = True,
+        get_time: Optional[GetTimeCallable] = None,
+        disable: bool = False,
+        expand: bool = False,
+    ) -> None:
+        assert refresh_per_second > 0, "refresh_per_second must be > 0"
+        self._lock = RLock()
+        self.columns = columns or self.get_default_columns()
+        self.speed_estimate_period = speed_estimate_period
+
+        self.disable = disable
+        self.expand = expand
+        self._tasks: Dict[TaskID, Task] = {}
+        self._task_index: TaskID = TaskID(0)
+        self.live = Live(
+            console=console or get_console(),
+            auto_refresh=auto_refresh,
+            refresh_per_second=refresh_per_second,
+            transient=transient,
+            redirect_stdout=redirect_stdout,
+            redirect_stderr=redirect_stderr,
+            get_renderable=self.get_renderable,
+        )
+        self.get_time = get_time or self.console.get_time
+        self.print = self.console.print
+        self.log = self.console.log
+
+    @classmethod
+    def get_default_columns(cls) -> Tuple[ProgressColumn, ...]:
+        """Get the default columns used for a new Progress instance:
+           - a text column for the description (TextColumn)
+           - the bar itself (BarColumn)
+           - a text column showing completion percentage (TextColumn)
+           - an estimated-time-remaining column (TimeRemainingColumn)
+        If the Progress instance is created without passing a columns argument,
+        the default columns defined here will be used.
+
+        You can also create a Progress instance using custom columns before
+        and/or after the defaults, as in this example:
+
+            progress = Progress(
+                SpinnerColumn(),
+                *Progress.default_columns(),
+                "Elapsed:",
+                TimeElapsedColumn(),
+            )
+
+        This code shows the creation of a Progress display, containing
+        a spinner to the left, the default columns, and a labeled elapsed
+        time column.
+        """
+        return (
+            TextColumn("[progress.description]{task.description}"),
+            BarColumn(),
+            TaskProgressColumn(),
+            TimeRemainingColumn(),
+        )
+
+    @property
+    def console(self) -> Console:
+        return self.live.console
+
+    @property
+    def tasks(self) -> List[Task]:
+        """Get a list of Task instances."""
+        with self._lock:
+            return list(self._tasks.values())
+
+    @property
+    def task_ids(self) -> List[TaskID]:
+        """A list of task IDs."""
+        with self._lock:
+            return list(self._tasks.keys())
+
+    @property
+    def finished(self) -> bool:
+        """Check if all tasks have been completed."""
+        with self._lock:
+            if not self._tasks:
+                return True
+            return all(task.finished for task in self._tasks.values())
+
+    def start(self) -> None:
+        """Start the progress display."""
+        if not self.disable:
+            self.live.start(refresh=True)
+
+    def stop(self) -> None:
+        """Stop the progress display."""
+        self.live.stop()
+        if not self.console.is_interactive:
+            self.console.print()
+
+    def __enter__(self) -> "Progress":
+        self.start()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.stop()
+
+    def track(
+        self,
+        sequence: Union[Iterable[ProgressType], Sequence[ProgressType]],
+        total: Optional[float] = None,
+        task_id: Optional[TaskID] = None,
+        description: str = "Working...",
+        update_period: float = 0.1,
+    ) -> Iterable[ProgressType]:
+        """Track progress by iterating over a sequence.
+
+        Args:
+            sequence (Sequence[ProgressType]): A sequence of values you want to iterate over and track progress.
+            total: (float, optional): Total number of steps. Default is len(sequence).
+            task_id: (TaskID): Task to track. Default is new task.
+            description: (str, optional): Description of task, if new task is created.
+            update_period (float, optional): Minimum time (in seconds) between calls to update(). Defaults to 0.1.
+
+        Returns:
+            Iterable[ProgressType]: An iterable of values taken from the provided sequence.
+        """
+
+        task_total: Optional[float] = None
+        if total is None:
+            if isinstance(sequence, Sized):
+                task_total = float(len(sequence))
+        else:
+            task_total = total
+
+        if task_id is None:
+            task_id = self.add_task(description, total=task_total)
+        else:
+            self.update(task_id, total=task_total)
+
+        if self.live.auto_refresh:
+            with _TrackThread(self, task_id, update_period) as track_thread:
+                for value in sequence:
+                    yield value
+                    track_thread.completed += 1
+        else:
+            advance = self.advance
+            refresh = self.refresh
+            for value in sequence:
+                yield value
+                advance(task_id, 1)
+                refresh()
+
+    def wrap_file(
+        self,
+        file: BinaryIO,
+        total: Optional[int] = None,
+        *,
+        task_id: Optional[TaskID] = None,
+        description: str = "Reading...",
+    ) -> BinaryIO:
+        """Track progress file reading from a binary file.
+
+        Args:
+            file (BinaryIO): A file-like object opened in binary mode.
+            total (int, optional): Total number of bytes to read. This must be provided unless a task with a total is also given.
+            task_id (TaskID): Task to track. Default is new task.
+            description (str, optional): Description of task, if new task is created.
+
+        Returns:
+            BinaryIO: A readable file-like object in binary mode.
+
+        Raises:
+            ValueError: When no total value can be extracted from the arguments or the task.
+        """
+        # attempt to recover the total from the task
+        total_bytes: Optional[float] = None
+        if total is not None:
+            total_bytes = total
+        elif task_id is not None:
+            with self._lock:
+                total_bytes = self._tasks[task_id].total
+        if total_bytes is None:
+            raise ValueError(
+                f"unable to get the total number of bytes, please specify 'total'"
+            )
+
+        # update total of task or create new task
+        if task_id is None:
+            task_id = self.add_task(description, total=total_bytes)
+        else:
+            self.update(task_id, total=total_bytes)
+
+        return _Reader(file, self, task_id, close_handle=False)
+
+    @typing.overload
+    def open(
+        self,
+        file: Union[str, "PathLike[str]", bytes],
+        mode: Literal["rb"],
+        buffering: int = -1,
+        encoding: Optional[str] = None,
+        errors: Optional[str] = None,
+        newline: Optional[str] = None,
+        *,
+        total: Optional[int] = None,
+        task_id: Optional[TaskID] = None,
+        description: str = "Reading...",
+    ) -> BinaryIO:
+        pass
+
+    @typing.overload
+    def open(
+        self,
+        file: Union[str, "PathLike[str]", bytes],
+        mode: Union[Literal["r"], Literal["rt"]],
+        buffering: int = -1,
+        encoding: Optional[str] = None,
+        errors: Optional[str] = None,
+        newline: Optional[str] = None,
+        *,
+        total: Optional[int] = None,
+        task_id: Optional[TaskID] = None,
+        description: str = "Reading...",
+    ) -> TextIO:
+        pass
+
+    def open(
+        self,
+        file: Union[str, "PathLike[str]", bytes],
+        mode: Union[Literal["rb"], Literal["rt"], Literal["r"]] = "r",
+        buffering: int = -1,
+        encoding: Optional[str] = None,
+        errors: Optional[str] = None,
+        newline: Optional[str] = None,
+        *,
+        total: Optional[int] = None,
+        task_id: Optional[TaskID] = None,
+        description: str = "Reading...",
+    ) -> Union[BinaryIO, TextIO]:
+        """Track progress while reading from a binary file.
+
+        Args:
+            path (Union[str, PathLike[str]]): The path to the file to read.
+            mode (str): The mode to use to open the file. Only supports "r", "rb" or "rt".
+            buffering (int): The buffering strategy to use, see :func:`io.open`.
+            encoding (str, optional): The encoding to use when reading in text mode, see :func:`io.open`.
+            errors (str, optional): The error handling strategy for decoding errors, see :func:`io.open`.
+            newline (str, optional): The strategy for handling newlines in text mode, see :func:`io.open`.
+            total (int, optional): Total number of bytes to read. If none given, os.stat(path).st_size is used.
+            task_id (TaskID): Task to track. Default is new task.
+            description (str, optional): Description of task, if new task is created.
+
+        Returns:
+            BinaryIO: A readable file-like object in binary mode.
+
+        Raises:
+            ValueError: When an invalid mode is given.
+        """
+        # normalize the mode (always rb, rt)
+        _mode = "".join(sorted(mode, reverse=False))
+        if _mode not in ("br", "rt", "r"):
+            raise ValueError("invalid mode {!r}".format(mode))
+
+        # patch buffering to provide the same behaviour as the builtin `open`
+        line_buffering = buffering == 1
+        if _mode == "br" and buffering == 1:
+            warnings.warn(
+                "line buffering (buffering=1) isn't supported in binary mode, the default buffer size will be used",
+                RuntimeWarning,
+            )
+            buffering = -1
+        elif _mode == "rt" or _mode == "r":
+            if buffering == 0:
+                raise ValueError("can't have unbuffered text I/O")
+            elif buffering == 1:
+                buffering = -1
+
+        # attempt to get the total with `os.stat`
+        if total is None:
+            total = stat(file).st_size
+
+        # update total of task or create new task
+        if task_id is None:
+            task_id = self.add_task(description, total=total)
+        else:
+            self.update(task_id, total=total)
+
+        # open the file in binary mode,
+        handle = io.open(file, "rb", buffering=buffering)
+        reader = _Reader(handle, self, task_id, close_handle=True)
+
+        # wrap the reader in a `TextIOWrapper` if text mode
+        if mode == "r" or mode == "rt":
+            return io.TextIOWrapper(
+                reader,
+                encoding=encoding,
+                errors=errors,
+                newline=newline,
+                line_buffering=line_buffering,
+            )
+
+        return reader
+
+    def start_task(self, task_id: TaskID) -> None:
+        """Start a task.
+
+        Starts a task (used when calculating elapsed time). You may need to call this manually,
+        if you called ``add_task`` with ``start=False``.
+
+        Args:
+            task_id (TaskID): ID of task.
+        """
+        with self._lock:
+            task = self._tasks[task_id]
+            if task.start_time is None:
+                task.start_time = self.get_time()
+
+    def stop_task(self, task_id: TaskID) -> None:
+        """Stop a task.
+
+        This will freeze the elapsed time on the task.
+
+        Args:
+            task_id (TaskID): ID of task.
+        """
+        with self._lock:
+            task = self._tasks[task_id]
+            current_time = self.get_time()
+            if task.start_time is None:
+                task.start_time = current_time
+            task.stop_time = current_time
+
+    def update(
+        self,
+        task_id: TaskID,
+        *,
+        total: Optional[float] = None,
+        completed: Optional[float] = None,
+        advance: Optional[float] = None,
+        description: Optional[str] = None,
+        visible: Optional[bool] = None,
+        refresh: bool = False,
+        **fields: Any,
+    ) -> None:
+        """Update information associated with a task.
+
+        Args:
+            task_id (TaskID): Task id (returned by add_task).
+            total (float, optional): Updates task.total if not None.
+            completed (float, optional): Updates task.completed if not None.
+            advance (float, optional): Add a value to task.completed if not None.
+            description (str, optional): Change task description if not None.
+            visible (bool, optional): Set visible flag if not None.
+            refresh (bool): Force a refresh of progress information. Default is False.
+            **fields (Any): Additional data fields required for rendering.
+        """
+        with self._lock:
+            task = self._tasks[task_id]
+            completed_start = task.completed
+
+            if total is not None and total != task.total:
+                task.total = total
+                task._reset()
+            if advance is not None:
+                task.completed += advance
+            if completed is not None:
+                task.completed = completed
+            if description is not None:
+                task.description = description
+            if visible is not None:
+                task.visible = visible
+            task.fields.update(fields)
+            update_completed = task.completed - completed_start
+
+            current_time = self.get_time()
+            old_sample_time = current_time - self.speed_estimate_period
+            _progress = task._progress
+
+            popleft = _progress.popleft
+            while _progress and _progress[0].timestamp < old_sample_time:
+                popleft()
+            if update_completed > 0:
+                _progress.append(ProgressSample(current_time, update_completed))
+            if (
+                task.total is not None
+                and task.completed >= task.total
+                and task.finished_time is None
+            ):
+                task.finished_time = task.elapsed
+
+        if refresh:
+            self.refresh()
+
+    def reset(
+        self,
+        task_id: TaskID,
+        *,
+        start: bool = True,
+        total: Optional[float] = None,
+        completed: int = 0,
+        visible: Optional[bool] = None,
+        description: Optional[str] = None,
+        **fields: Any,
+    ) -> None:
+        """Reset a task so completed is 0 and the clock is reset.
+
+        Args:
+            task_id (TaskID): ID of task.
+            start (bool, optional): Start the task after reset. Defaults to True.
+            total (float, optional): New total steps in task, or None to use current total. Defaults to None.
+            completed (int, optional): Number of steps completed. Defaults to 0.
+            visible (bool, optional): Enable display of the task. Defaults to True.
+            description (str, optional): Change task description if not None. Defaults to None.
+            **fields (str): Additional data fields required for rendering.
+        """
+        current_time = self.get_time()
+        with self._lock:
+            task = self._tasks[task_id]
+            task._reset()
+            task.start_time = current_time if start else None
+            if total is not None:
+                task.total = total
+            task.completed = completed
+            if visible is not None:
+                task.visible = visible
+            if fields:
+                task.fields = fields
+            if description is not None:
+                task.description = description
+            task.finished_time = None
+        self.refresh()
+
+    def advance(self, task_id: TaskID, advance: float = 1) -> None:
+        """Advance task by a number of steps.
+
+        Args:
+            task_id (TaskID): ID of task.
+            advance (float): Number of steps to advance. Default is 1.
+        """
+        current_time = self.get_time()
+        with self._lock:
+            task = self._tasks[task_id]
+            completed_start = task.completed
+            task.completed += advance
+            update_completed = task.completed - completed_start
+            old_sample_time = current_time - self.speed_estimate_period
+            _progress = task._progress
+
+            popleft = _progress.popleft
+            while _progress and _progress[0].timestamp < old_sample_time:
+                popleft()
+            while len(_progress) > 1000:
+                popleft()
+            _progress.append(ProgressSample(current_time, update_completed))
+            if (
+                task.total is not None
+                and task.completed >= task.total
+                and task.finished_time is None
+            ):
+                task.finished_time = task.elapsed
+                task.finished_speed = task.speed
+
+    def refresh(self) -> None:
+        """Refresh (render) the progress information."""
+        if not self.disable and self.live.is_started:
+            self.live.refresh()
+
+    def get_renderable(self) -> RenderableType:
+        """Get a renderable for the progress display."""
+        renderable = Group(*self.get_renderables())
+        return renderable
+
+    def get_renderables(self) -> Iterable[RenderableType]:
+        """Get a number of renderables for the progress display."""
+        table = self.make_tasks_table(self.tasks)
+        yield table
+
+    def make_tasks_table(self, tasks: Iterable[Task]) -> Table:
+        """Get a table to render the Progress display.
+
+        Args:
+            tasks (Iterable[Task]): An iterable of Task instances, one per row of the table.
+
+        Returns:
+            Table: A table instance.
+        """
+        table_columns = (
+            (
+                Column(no_wrap=True)
+                if isinstance(_column, str)
+                else _column.get_table_column().copy()
+            )
+            for _column in self.columns
+        )
+        table = Table.grid(*table_columns, padding=(0, 1), expand=self.expand)
+
+        for task in tasks:
+            if task.visible:
+                table.add_row(
+                    *(
+                        (
+                            column.format(task=task)
+                            if isinstance(column, str)
+                            else column(task)
+                        )
+                        for column in self.columns
+                    )
+                )
+        return table
+
+    def __rich__(self) -> RenderableType:
+        """Makes the Progress class itself renderable."""
+        with self._lock:
+            return self.get_renderable()
+
+    def add_task(
+        self,
+        description: str,
+        start: bool = True,
+        total: Optional[float] = 100.0,
+        completed: int = 0,
+        visible: bool = True,
+        **fields: Any,
+    ) -> TaskID:
+        """Add a new 'task' to the Progress display.
+
+        Args:
+            description (str): A description of the task.
+            start (bool, optional): Start the task immediately (to calculate elapsed time). If set to False,
+                you will need to call `start` manually. Defaults to True.
+            total (float, optional): Number of total steps in the progress if known.
+                Set to None to render a pulsing animation. Defaults to 100.
+            completed (int, optional): Number of steps completed so far. Defaults to 0.
+            visible (bool, optional): Enable display of the task. Defaults to True.
+            **fields (str): Additional data fields required for rendering.
+
+        Returns:
+            TaskID: An ID you can use when calling `update`.
+        """
+        with self._lock:
+            task = Task(
+                self._task_index,
+                description,
+                total,
+                completed,
+                visible=visible,
+                fields=fields,
+                _get_time=self.get_time,
+                _lock=self._lock,
+            )
+            self._tasks[self._task_index] = task
+            if start:
+                self.start_task(self._task_index)
+            new_task_index = self._task_index
+            self._task_index = TaskID(int(self._task_index) + 1)
+        self.refresh()
+        return new_task_index
+
+    def remove_task(self, task_id: TaskID) -> None:
+        """Delete a task if it exists.
+
+        Args:
+            task_id (TaskID): A task ID.
+
+        """
+        with self._lock:
+            del self._tasks[task_id]
+
+
+if __name__ == "__main__":  # pragma: no coverage
+
+    import random
+    import time
+
+    from .panel import Panel
+    from .rule import Rule
+    from .syntax import Syntax
+    from .table import Table
+
+    syntax = Syntax(
+        '''def loop_last(values: Iterable[T]) -> Iterable[Tuple[bool, T]]:
+    """Iterate and generate a tuple with a flag for last value."""
+    iter_values = iter(values)
+    try:
+        previous_value = next(iter_values)
+    except StopIteration:
+        return
+    for value in iter_values:
+        yield False, previous_value
+        previous_value = value
+    yield True, previous_value''',
+        "python",
+        line_numbers=True,
+    )
+
+    table = Table("foo", "bar", "baz")
+    table.add_row("1", "2", "3")
+
+    progress_renderables = [
+        "Text may be printed while the progress bars are rendering.",
+        Panel("In fact, [i]any[/i] renderable will work"),
+        "Such as [magenta]tables[/]...",
+        table,
+        "Pretty printed structures...",
+        {"type": "example", "text": "Pretty printed"},
+        "Syntax...",
+        syntax,
+        Rule("Give it a try!"),
+    ]
+
+    from itertools import cycle
+
+    examples = cycle(progress_renderables)
+
+    console = Console(record=True)
+
+    with Progress(
+        SpinnerColumn(),
+        *Progress.get_default_columns(),
+        TimeElapsedColumn(),
+        console=console,
+        transient=False,
+    ) as progress:
+
+        task1 = progress.add_task("[red]Downloading", total=1000)
+        task2 = progress.add_task("[green]Processing", total=1000)
+        task3 = progress.add_task("[yellow]Thinking", total=None)
+
+        while not progress.finished:
+            progress.update(task1, advance=0.5)
+            progress.update(task2, advance=0.3)
+            time.sleep(0.01)
+            if random.randint(0, 100) < 1:
+                progress.log(next(examples))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress_bar.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress_bar.py
new file mode 100644
index 0000000..9c3a4f2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/progress_bar.py
@@ -0,0 +1,224 @@
+import math
+from functools import lru_cache
+from time import monotonic
+from typing import Iterable, List, Optional
+
+from .color import Color, blend_rgb
+from .color_triplet import ColorTriplet
+from .console import Console, ConsoleOptions, RenderResult
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment
+from .style import Style, StyleType
+
+# Number of characters before 'pulse' animation repeats
+PULSE_SIZE = 20
+
+
+class ProgressBar(JupyterMixin):
+    """Renders a (progress) bar. Used by rich.progress.
+
+    Args:
+        total (float, optional): Number of steps in the bar. Defaults to 100. Set to None to render a pulsing animation.
+        completed (float, optional): Number of steps completed. Defaults to 0.
+        width (int, optional): Width of the bar, or ``None`` for maximum width. Defaults to None.
+        pulse (bool, optional): Enable pulse effect. Defaults to False. Will pulse if a None total was passed.
+        style (StyleType, optional): Style for the bar background. Defaults to "bar.back".
+        complete_style (StyleType, optional): Style for the completed bar. Defaults to "bar.complete".
+        finished_style (StyleType, optional): Style for a finished bar. Defaults to "bar.done".
+        pulse_style (StyleType, optional): Style for pulsing bars. Defaults to "bar.pulse".
+        animation_time (Optional[float], optional): Time in seconds to use for animation, or None to use system time.
+    """
+
+    def __init__(
+        self,
+        total: Optional[float] = 100.0,
+        completed: float = 0,
+        width: Optional[int] = None,
+        pulse: bool = False,
+        style: StyleType = "bar.back",
+        complete_style: StyleType = "bar.complete",
+        finished_style: StyleType = "bar.finished",
+        pulse_style: StyleType = "bar.pulse",
+        animation_time: Optional[float] = None,
+    ):
+        self.total = total
+        self.completed = completed
+        self.width = width
+        self.pulse = pulse
+        self.style = style
+        self.complete_style = complete_style
+        self.finished_style = finished_style
+        self.pulse_style = pulse_style
+        self.animation_time = animation_time
+
+        self._pulse_segments: Optional[List[Segment]] = None
+
+    def __repr__(self) -> str:
+        return f"<Bar {self.completed!r} of {self.total!r}>"
+
+    @property
+    def percentage_completed(self) -> Optional[float]:
+        """Calculate percentage complete."""
+        if self.total is None:
+            return None
+        completed = (self.completed / self.total) * 100.0
+        completed = min(100, max(0.0, completed))
+        return completed
+
+    @lru_cache(maxsize=16)
+    def _get_pulse_segments(
+        self,
+        fore_style: Style,
+        back_style: Style,
+        color_system: str,
+        no_color: bool,
+        ascii: bool = False,
+    ) -> List[Segment]:
+        """Get a list of segments to render a pulse animation.
+
+        Returns:
+            List[Segment]: A list of segments, one segment per character.
+        """
+        bar = "-" if ascii else "━"
+        segments: List[Segment] = []
+        if color_system not in ("standard", "eight_bit", "truecolor") or no_color:
+            segments += [Segment(bar, fore_style)] * (PULSE_SIZE // 2)
+            segments += [Segment(" " if no_color else bar, back_style)] * (
+                PULSE_SIZE - (PULSE_SIZE // 2)
+            )
+            return segments
+
+        append = segments.append
+        fore_color = (
+            fore_style.color.get_truecolor()
+            if fore_style.color
+            else ColorTriplet(255, 0, 255)
+        )
+        back_color = (
+            back_style.color.get_truecolor()
+            if back_style.color
+            else ColorTriplet(0, 0, 0)
+        )
+        cos = math.cos
+        pi = math.pi
+        _Segment = Segment
+        _Style = Style
+        from_triplet = Color.from_triplet
+
+        for index in range(PULSE_SIZE):
+            position = index / PULSE_SIZE
+            fade = 0.5 + cos((position * pi * 2)) / 2.0
+            color = blend_rgb(fore_color, back_color, cross_fade=fade)
+            append(_Segment(bar, _Style(color=from_triplet(color))))
+        return segments
+
+    def update(self, completed: float, total: Optional[float] = None) -> None:
+        """Update progress with new values.
+
+        Args:
+            completed (float): Number of steps completed.
+            total (float, optional): Total number of steps, or ``None`` to not change. Defaults to None.
+        """
+        self.completed = completed
+        self.total = total if total is not None else self.total
+
+    def _render_pulse(
+        self, console: Console, width: int, ascii: bool = False
+    ) -> Iterable[Segment]:
+        """Renders the pulse animation.
+
+        Args:
+            console (Console): Console instance.
+            width (int): Width in characters of pulse animation.
+
+        Returns:
+            RenderResult: [description]
+
+        Yields:
+            Iterator[Segment]: Segments to render pulse
+        """
+        fore_style = console.get_style(self.pulse_style, default="white")
+        back_style = console.get_style(self.style, default="black")
+
+        pulse_segments = self._get_pulse_segments(
+            fore_style, back_style, console.color_system, console.no_color, ascii=ascii
+        )
+        segment_count = len(pulse_segments)
+        current_time = (
+            monotonic() if self.animation_time is None else self.animation_time
+        )
+        segments = pulse_segments * (int(width / segment_count) + 2)
+        offset = int(-current_time * 15) % segment_count
+        segments = segments[offset : offset + width]
+        yield from segments
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+
+        width = min(self.width or options.max_width, options.max_width)
+        ascii = options.legacy_windows or options.ascii_only
+        should_pulse = self.pulse or self.total is None
+        if should_pulse:
+            yield from self._render_pulse(console, width, ascii=ascii)
+            return
+
+        completed: Optional[float] = (
+            min(self.total, max(0, self.completed)) if self.total is not None else None
+        )
+
+        bar = "-" if ascii else "━"
+        half_bar_right = " " if ascii else "╸"
+        half_bar_left = " " if ascii else "╺"
+        complete_halves = (
+            int(width * 2 * completed / self.total)
+            if self.total and completed is not None
+            else width * 2
+        )
+        bar_count = complete_halves // 2
+        half_bar_count = complete_halves % 2
+        style = console.get_style(self.style)
+        is_finished = self.total is None or self.completed >= self.total
+        complete_style = console.get_style(
+            self.finished_style if is_finished else self.complete_style
+        )
+        _Segment = Segment
+        if bar_count:
+            yield _Segment(bar * bar_count, complete_style)
+        if half_bar_count:
+            yield _Segment(half_bar_right * half_bar_count, complete_style)
+
+        if not console.no_color:
+            remaining_bars = width - bar_count - half_bar_count
+            if remaining_bars and console.color_system is not None:
+                if not half_bar_count and bar_count:
+                    yield _Segment(half_bar_left, style)
+                    remaining_bars -= 1
+                if remaining_bars:
+                    yield _Segment(bar * remaining_bars, style)
+
+    def __rich_measure__(
+        self, console: Console, options: ConsoleOptions
+    ) -> Measurement:
+        return (
+            Measurement(self.width, self.width)
+            if self.width is not None
+            else Measurement(4, options.max_width)
+        )
+
+
+if __name__ == "__main__":  # pragma: no cover
+    console = Console()
+    bar = ProgressBar(width=50, total=100)
+
+    import time
+
+    console.show_cursor(False)
+    for n in range(0, 101, 1):
+        bar.update(n)
+        console.print(bar)
+        console.file.write("\r")
+        time.sleep(0.05)
+    console.show_cursor(True)
+    console.print()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/prompt.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/prompt.py
new file mode 100644
index 0000000..2bd0a77
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/prompt.py
@@ -0,0 +1,376 @@
+from typing import Any, Generic, List, Optional, TextIO, TypeVar, Union, overload
+
+from . import get_console
+from .console import Console
+from .text import Text, TextType
+
+PromptType = TypeVar("PromptType")
+DefaultType = TypeVar("DefaultType")
+
+
+class PromptError(Exception):
+    """Exception base class for prompt related errors."""
+
+
+class InvalidResponse(PromptError):
+    """Exception to indicate a response was invalid. Raise this within process_response() to indicate an error
+    and provide an error message.
+
+    Args:
+        message (Union[str, Text]): Error message.
+    """
+
+    def __init__(self, message: TextType) -> None:
+        self.message = message
+
+    def __rich__(self) -> TextType:
+        return self.message
+
+
+class PromptBase(Generic[PromptType]):
+    """Ask the user for input until a valid response is received. This is the base class, see one of
+    the concrete classes for examples.
+
+    Args:
+        prompt (TextType, optional): Prompt text. Defaults to "".
+        console (Console, optional): A Console instance or None to use global console. Defaults to None.
+        password (bool, optional): Enable password input. Defaults to False.
+        choices (List[str], optional): A list of valid choices. Defaults to None.
+        show_default (bool, optional): Show default in prompt. Defaults to True.
+        show_choices (bool, optional): Show choices in prompt. Defaults to True.
+    """
+
+    response_type: type = str
+
+    validate_error_message = "[prompt.invalid]Please enter a valid value"
+    illegal_choice_message = (
+        "[prompt.invalid.choice]Please select one of the available options"
+    )
+    prompt_suffix = ": "
+
+    choices: Optional[List[str]] = None
+
+    def __init__(
+        self,
+        prompt: TextType = "",
+        *,
+        console: Optional[Console] = None,
+        password: bool = False,
+        choices: Optional[List[str]] = None,
+        show_default: bool = True,
+        show_choices: bool = True,
+    ) -> None:
+        self.console = console or get_console()
+        self.prompt = (
+            Text.from_markup(prompt, style="prompt")
+            if isinstance(prompt, str)
+            else prompt
+        )
+        self.password = password
+        if choices is not None:
+            self.choices = choices
+        self.show_default = show_default
+        self.show_choices = show_choices
+
+    @classmethod
+    @overload
+    def ask(
+        cls,
+        prompt: TextType = "",
+        *,
+        console: Optional[Console] = None,
+        password: bool = False,
+        choices: Optional[List[str]] = None,
+        show_default: bool = True,
+        show_choices: bool = True,
+        default: DefaultType,
+        stream: Optional[TextIO] = None,
+    ) -> Union[DefaultType, PromptType]:
+        ...
+
+    @classmethod
+    @overload
+    def ask(
+        cls,
+        prompt: TextType = "",
+        *,
+        console: Optional[Console] = None,
+        password: bool = False,
+        choices: Optional[List[str]] = None,
+        show_default: bool = True,
+        show_choices: bool = True,
+        stream: Optional[TextIO] = None,
+    ) -> PromptType:
+        ...
+
+    @classmethod
+    def ask(
+        cls,
+        prompt: TextType = "",
+        *,
+        console: Optional[Console] = None,
+        password: bool = False,
+        choices: Optional[List[str]] = None,
+        show_default: bool = True,
+        show_choices: bool = True,
+        default: Any = ...,
+        stream: Optional[TextIO] = None,
+    ) -> Any:
+        """Shortcut to construct and run a prompt loop and return the result.
+
+        Example:
+            >>> filename = Prompt.ask("Enter a filename")
+
+        Args:
+            prompt (TextType, optional): Prompt text. Defaults to "".
+            console (Console, optional): A Console instance or None to use global console. Defaults to None.
+            password (bool, optional): Enable password input. Defaults to False.
+            choices (List[str], optional): A list of valid choices. Defaults to None.
+            show_default (bool, optional): Show default in prompt. Defaults to True.
+            show_choices (bool, optional): Show choices in prompt. Defaults to True.
+            stream (TextIO, optional): Optional text file open for reading to get input. Defaults to None.
+        """
+        _prompt = cls(
+            prompt,
+            console=console,
+            password=password,
+            choices=choices,
+            show_default=show_default,
+            show_choices=show_choices,
+        )
+        return _prompt(default=default, stream=stream)
+
+    def render_default(self, default: DefaultType) -> Text:
+        """Turn the supplied default in to a Text instance.
+
+        Args:
+            default (DefaultType): Default value.
+
+        Returns:
+            Text: Text containing rendering of default value.
+        """
+        return Text(f"({default})", "prompt.default")
+
+    def make_prompt(self, default: DefaultType) -> Text:
+        """Make prompt text.
+
+        Args:
+            default (DefaultType): Default value.
+
+        Returns:
+            Text: Text to display in prompt.
+        """
+        prompt = self.prompt.copy()
+        prompt.end = ""
+
+        if self.show_choices and self.choices:
+            _choices = "/".join(self.choices)
+            choices = f"[{_choices}]"
+            prompt.append(" ")
+            prompt.append(choices, "prompt.choices")
+
+        if (
+            default != ...
+            and self.show_default
+            and isinstance(default, (str, self.response_type))
+        ):
+            prompt.append(" ")
+            _default = self.render_default(default)
+            prompt.append(_default)
+
+        prompt.append(self.prompt_suffix)
+
+        return prompt
+
+    @classmethod
+    def get_input(
+        cls,
+        console: Console,
+        prompt: TextType,
+        password: bool,
+        stream: Optional[TextIO] = None,
+    ) -> str:
+        """Get input from user.
+
+        Args:
+            console (Console): Console instance.
+            prompt (TextType): Prompt text.
+            password (bool): Enable password entry.
+
+        Returns:
+            str: String from user.
+        """
+        return console.input(prompt, password=password, stream=stream)
+
+    def check_choice(self, value: str) -> bool:
+        """Check value is in the list of valid choices.
+
+        Args:
+            value (str): Value entered by user.
+
+        Returns:
+            bool: True if choice was valid, otherwise False.
+        """
+        assert self.choices is not None
+        return value.strip() in self.choices
+
+    def process_response(self, value: str) -> PromptType:
+        """Process response from user, convert to prompt type.
+
+        Args:
+            value (str): String typed by user.
+
+        Raises:
+            InvalidResponse: If ``value`` is invalid.
+
+        Returns:
+            PromptType: The value to be returned from ask method.
+        """
+        value = value.strip()
+        try:
+            return_value: PromptType = self.response_type(value)
+        except ValueError:
+            raise InvalidResponse(self.validate_error_message)
+
+        if self.choices is not None and not self.check_choice(value):
+            raise InvalidResponse(self.illegal_choice_message)
+
+        return return_value
+
+    def on_validate_error(self, value: str, error: InvalidResponse) -> None:
+        """Called to handle validation error.
+
+        Args:
+            value (str): String entered by user.
+            error (InvalidResponse): Exception instance the initiated the error.
+        """
+        self.console.print(error)
+
+    def pre_prompt(self) -> None:
+        """Hook to display something before the prompt."""
+
+    @overload
+    def __call__(self, *, stream: Optional[TextIO] = None) -> PromptType:
+        ...
+
+    @overload
+    def __call__(
+        self, *, default: DefaultType, stream: Optional[TextIO] = None
+    ) -> Union[PromptType, DefaultType]:
+        ...
+
+    def __call__(self, *, default: Any = ..., stream: Optional[TextIO] = None) -> Any:
+        """Run the prompt loop.
+
+        Args:
+            default (Any, optional): Optional default value.
+
+        Returns:
+            PromptType: Processed value.
+        """
+        while True:
+            self.pre_prompt()
+            prompt = self.make_prompt(default)
+            value = self.get_input(self.console, prompt, self.password, stream=stream)
+            if value == "" and default != ...:
+                return default
+            try:
+                return_value = self.process_response(value)
+            except InvalidResponse as error:
+                self.on_validate_error(value, error)
+                continue
+            else:
+                return return_value
+
+
+class Prompt(PromptBase[str]):
+    """A prompt that returns a str.
+
+    Example:
+        >>> name = Prompt.ask("Enter your name")
+
+
+    """
+
+    response_type = str
+
+
+class IntPrompt(PromptBase[int]):
+    """A prompt that returns an integer.
+
+    Example:
+        >>> burrito_count = IntPrompt.ask("How many burritos do you want to order")
+
+    """
+
+    response_type = int
+    validate_error_message = "[prompt.invalid]Please enter a valid integer number"
+
+
+class FloatPrompt(PromptBase[int]):
+    """A prompt that returns a float.
+
+    Example:
+        >>> temperature = FloatPrompt.ask("Enter desired temperature")
+
+    """
+
+    response_type = float
+    validate_error_message = "[prompt.invalid]Please enter a number"
+
+
+class Confirm(PromptBase[bool]):
+    """A yes / no confirmation prompt.
+
+    Example:
+        >>> if Confirm.ask("Continue"):
+                run_job()
+
+    """
+
+    response_type = bool
+    validate_error_message = "[prompt.invalid]Please enter Y or N"
+    choices: List[str] = ["y", "n"]
+
+    def render_default(self, default: DefaultType) -> Text:
+        """Render the default as (y) or (n) rather than True/False."""
+        yes, no = self.choices
+        return Text(f"({yes})" if default else f"({no})", style="prompt.default")
+
+    def process_response(self, value: str) -> bool:
+        """Convert choices to a bool."""
+        value = value.strip().lower()
+        if value not in self.choices:
+            raise InvalidResponse(self.validate_error_message)
+        return value == self.choices[0]
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from pip._vendor.rich import print
+
+    if Confirm.ask("Run [i]prompt[/i] tests?", default=True):
+        while True:
+            result = IntPrompt.ask(
+                ":rocket: Enter a number between [b]1[/b] and [b]10[/b]", default=5
+            )
+            if result >= 1 and result <= 10:
+                break
+            print(":pile_of_poo: [prompt.invalid]Number must be between 1 and 10")
+        print(f"number={result}")
+
+        while True:
+            password = Prompt.ask(
+                "Please enter a password [cyan](must be at least 5 characters)",
+                password=True,
+            )
+            if len(password) >= 5:
+                break
+            print("[prompt.invalid]password too short")
+        print(f"password={password!r}")
+
+        fruit = Prompt.ask("Enter a fruit", choices=["apple", "orange", "pear"])
+        print(f"fruit={fruit!r}")
+
+    else:
+        print("[b]OK :loudly_crying_face:")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/protocol.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/protocol.py
new file mode 100644
index 0000000..12ab237
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/protocol.py
@@ -0,0 +1,42 @@
+from typing import Any, cast, Set, TYPE_CHECKING
+from inspect import isclass
+
+if TYPE_CHECKING:
+    from pip._vendor.rich.console import RenderableType
+
+_GIBBERISH = """aihwerij235234ljsdnp34ksodfipwoe234234jlskjdf"""
+
+
+def is_renderable(check_object: Any) -> bool:
+    """Check if an object may be rendered by Rich."""
+    return (
+        isinstance(check_object, str)
+        or hasattr(check_object, "__rich__")
+        or hasattr(check_object, "__rich_console__")
+    )
+
+
+def rich_cast(renderable: object) -> "RenderableType":
+    """Cast an object to a renderable by calling __rich__ if present.
+
+    Args:
+        renderable (object): A potentially renderable object
+
+    Returns:
+        object: The result of recursively calling __rich__.
+    """
+    from pip._vendor.rich.console import RenderableType
+
+    rich_visited_set: Set[type] = set()  # Prevent potential infinite loop
+    while hasattr(renderable, "__rich__") and not isclass(renderable):
+        # Detect object which claim to have all the attributes
+        if hasattr(renderable, _GIBBERISH):
+            return repr(renderable)
+        cast_method = getattr(renderable, "__rich__")
+        renderable = cast_method()
+        renderable_type = type(renderable)
+        if renderable_type in rich_visited_set:
+            break
+        rich_visited_set.add(renderable_type)
+
+    return cast(RenderableType, renderable)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/region.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/region.py
new file mode 100644
index 0000000..75b3631
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/region.py
@@ -0,0 +1,10 @@
+from typing import NamedTuple
+
+
+class Region(NamedTuple):
+    """Defines a rectangular region of the screen."""
+
+    x: int
+    y: int
+    width: int
+    height: int
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/repr.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/repr.py
new file mode 100644
index 0000000..36966e7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/repr.py
@@ -0,0 +1,152 @@
+from functools import partial
+import inspect
+import sys
+
+from typing import (
+    Any,
+    Callable,
+    Iterable,
+    List,
+    Optional,
+    overload,
+    Union,
+    Tuple,
+    Type,
+    TypeVar,
+)
+
+
+T = TypeVar("T")
+
+
+Result = Iterable[Union[Any, Tuple[Any], Tuple[str, Any], Tuple[str, Any, Any]]]
+RichReprResult = Result
+
+
+class ReprError(Exception):
+    """An error occurred when attempting to build a repr."""
+
+
+@overload
+def auto(cls: Optional[Type[T]]) -> Type[T]:
+    ...
+
+
+@overload
+def auto(*, angular: bool = False) -> Callable[[Type[T]], Type[T]]:
+    ...
+
+
+def auto(
+    cls: Optional[Type[T]] = None, *, angular: Optional[bool] = None
+) -> Union[Type[T], Callable[[Type[T]], Type[T]]]:
+    """Class decorator to create __repr__ from __rich_repr__"""
+
+    def do_replace(cls: Type[T], angular: Optional[bool] = None) -> Type[T]:
+        def auto_repr(self: T) -> str:
+            """Create repr string from __rich_repr__"""
+            repr_str: List[str] = []
+            append = repr_str.append
+
+            angular: bool = getattr(self.__rich_repr__, "angular", False)  # type: ignore[attr-defined]
+            for arg in self.__rich_repr__():  # type: ignore[attr-defined]
+                if isinstance(arg, tuple):
+                    if len(arg) == 1:
+                        append(repr(arg[0]))
+                    else:
+                        key, value, *default = arg
+                        if key is None:
+                            append(repr(value))
+                        else:
+                            if len(default) and default[0] == value:
+                                continue
+                            append(f"{key}={value!r}")
+                else:
+                    append(repr(arg))
+            if angular:
+                return f"<{self.__class__.__name__} {' '.join(repr_str)}>"
+            else:
+                return f"{self.__class__.__name__}({', '.join(repr_str)})"
+
+        def auto_rich_repr(self: Type[T]) -> Result:
+            """Auto generate __rich_rep__ from signature of __init__"""
+            try:
+                signature = inspect.signature(self.__init__)
+                for name, param in signature.parameters.items():
+                    if param.kind == param.POSITIONAL_ONLY:
+                        yield getattr(self, name)
+                    elif param.kind in (
+                        param.POSITIONAL_OR_KEYWORD,
+                        param.KEYWORD_ONLY,
+                    ):
+                        if param.default == param.empty:
+                            yield getattr(self, param.name)
+                        else:
+                            yield param.name, getattr(self, param.name), param.default
+            except Exception as error:
+                raise ReprError(
+                    f"Failed to auto generate __rich_repr__; {error}"
+                ) from None
+
+        if not hasattr(cls, "__rich_repr__"):
+            auto_rich_repr.__doc__ = "Build a rich repr"
+            cls.__rich_repr__ = auto_rich_repr  # type: ignore[attr-defined]
+
+        auto_repr.__doc__ = "Return repr(self)"
+        cls.__repr__ = auto_repr  # type: ignore[assignment]
+        if angular is not None:
+            cls.__rich_repr__.angular = angular  # type: ignore[attr-defined]
+        return cls
+
+    if cls is None:
+        return partial(do_replace, angular=angular)
+    else:
+        return do_replace(cls, angular=angular)
+
+
+@overload
+def rich_repr(cls: Optional[Type[T]]) -> Type[T]:
+    ...
+
+
+@overload
+def rich_repr(*, angular: bool = False) -> Callable[[Type[T]], Type[T]]:
+    ...
+
+
+def rich_repr(
+    cls: Optional[Type[T]] = None, *, angular: bool = False
+) -> Union[Type[T], Callable[[Type[T]], Type[T]]]:
+    if cls is None:
+        return auto(angular=angular)
+    else:
+        return auto(cls)
+
+
+if __name__ == "__main__":
+
+    @auto
+    class Foo:
+        def __rich_repr__(self) -> Result:
+            yield "foo"
+            yield "bar", {"shopping": ["eggs", "ham", "pineapple"]}
+            yield "buy", "hand sanitizer"
+
+    foo = Foo()
+    from pip._vendor.rich.console import Console
+
+    console = Console()
+
+    console.rule("Standard repr")
+    console.print(foo)
+
+    console.print(foo, width=60)
+    console.print(foo, width=30)
+
+    console.rule("Angular repr")
+    Foo.__rich_repr__.angular = True  # type: ignore[attr-defined]
+
+    console.print(foo)
+
+    console.print(foo, width=60)
+    console.print(foo, width=30)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/rule.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/rule.py
new file mode 100644
index 0000000..0b78f7a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/rule.py
@@ -0,0 +1,134 @@
+from typing import Union
+
+from .align import AlignMethod
+from .cells import cell_len, set_cell_size
+from .console import Console, ConsoleOptions, RenderResult
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .style import Style
+from .text import Text
+
+
+class Rule(JupyterMixin):
+    """A console renderable to draw a horizontal rule (line).
+
+    Args:
+        title (Union[str, Text], optional): Text to render in the rule. Defaults to "".
+        characters (str, optional): Character(s) used to draw the line. Defaults to "─".
+        style (StyleType, optional): Style of Rule. Defaults to "rule.line".
+        end (str, optional): Character at end of Rule. defaults to "\\\\n"
+        align (str, optional): How to align the title, one of "left", "center", or "right". Defaults to "center".
+    """
+
+    def __init__(
+        self,
+        title: Union[str, Text] = "",
+        *,
+        characters: str = "─",
+        style: Union[str, Style] = "rule.line",
+        end: str = "\n",
+        align: AlignMethod = "center",
+    ) -> None:
+        if cell_len(characters) < 1:
+            raise ValueError(
+                "'characters' argument must have a cell width of at least 1"
+            )
+        if align not in ("left", "center", "right"):
+            raise ValueError(
+                f'invalid value for align, expected "left", "center", "right" (not {align!r})'
+            )
+        self.title = title
+        self.characters = characters
+        self.style = style
+        self.end = end
+        self.align = align
+
+    def __repr__(self) -> str:
+        return f"Rule({self.title!r}, {self.characters!r})"
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        width = options.max_width
+
+        # Python3.6 doesn't have an isascii method on str
+        isascii = getattr(str, "isascii", None) or (
+            lambda s: all(ord(c) < 128 for c in s)
+        )
+        characters = (
+            "-"
+            if (options.ascii_only and not isascii(self.characters))
+            else self.characters
+        )
+
+        chars_len = cell_len(characters)
+        if not self.title:
+            yield self._rule_line(chars_len, width)
+            return
+
+        if isinstance(self.title, Text):
+            title_text = self.title
+        else:
+            title_text = console.render_str(self.title, style="rule.text")
+
+        title_text.plain = title_text.plain.replace("\n", " ")
+        title_text.expand_tabs()
+
+        required_space = 4 if self.align == "center" else 2
+        truncate_width = max(0, width - required_space)
+        if not truncate_width:
+            yield self._rule_line(chars_len, width)
+            return
+
+        rule_text = Text(end=self.end)
+        if self.align == "center":
+            title_text.truncate(truncate_width, overflow="ellipsis")
+            side_width = (width - cell_len(title_text.plain)) // 2
+            left = Text(characters * (side_width // chars_len + 1))
+            left.truncate(side_width - 1)
+            right_length = width - cell_len(left.plain) - cell_len(title_text.plain)
+            right = Text(characters * (side_width // chars_len + 1))
+            right.truncate(right_length)
+            rule_text.append(left.plain + " ", self.style)
+            rule_text.append(title_text)
+            rule_text.append(" " + right.plain, self.style)
+        elif self.align == "left":
+            title_text.truncate(truncate_width, overflow="ellipsis")
+            rule_text.append(title_text)
+            rule_text.append(" ")
+            rule_text.append(characters * (width - rule_text.cell_len), self.style)
+        elif self.align == "right":
+            title_text.truncate(truncate_width, overflow="ellipsis")
+            rule_text.append(characters * (width - title_text.cell_len - 1), self.style)
+            rule_text.append(" ")
+            rule_text.append(title_text)
+
+        rule_text.plain = set_cell_size(rule_text.plain, width)
+        yield rule_text
+
+    def _rule_line(self, chars_len: int, width: int) -> Text:
+        rule_text = Text(self.characters * ((width // chars_len) + 1), self.style)
+        rule_text.truncate(width)
+        rule_text.plain = set_cell_size(rule_text.plain, width)
+        return rule_text
+
+    def __rich_measure__(
+        self, console: Console, options: ConsoleOptions
+    ) -> Measurement:
+        return Measurement(1, 1)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    import sys
+
+    from pip._vendor.rich.console import Console
+
+    try:
+        text = sys.argv[1]
+    except IndexError:
+        text = "Hello, World"
+    console = Console()
+    console.print(Rule(title=text))
+
+    console = Console()
+    console.print(Rule("foo"), width=4)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/scope.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/scope.py
new file mode 100644
index 0000000..6822b8c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/scope.py
@@ -0,0 +1,86 @@
+from collections.abc import Mapping
+from typing import TYPE_CHECKING, Any, Optional, Tuple
+
+from .highlighter import ReprHighlighter
+from .panel import Panel
+from .pretty import Pretty
+from .table import Table
+from .text import Text, TextType
+
+if TYPE_CHECKING:
+    from .console import ConsoleRenderable
+
+
+def render_scope(
+    scope: "Mapping[str, Any]",
+    *,
+    title: Optional[TextType] = None,
+    sort_keys: bool = True,
+    indent_guides: bool = False,
+    max_length: Optional[int] = None,
+    max_string: Optional[int] = None,
+) -> "ConsoleRenderable":
+    """Render python variables in a given scope.
+
+    Args:
+        scope (Mapping): A mapping containing variable names and values.
+        title (str, optional): Optional title. Defaults to None.
+        sort_keys (bool, optional): Enable sorting of items. Defaults to True.
+        indent_guides (bool, optional): Enable indentaton guides. Defaults to False.
+        max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to None.
+        max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to None.
+
+    Returns:
+        ConsoleRenderable: A renderable object.
+    """
+    highlighter = ReprHighlighter()
+    items_table = Table.grid(padding=(0, 1), expand=False)
+    items_table.add_column(justify="right")
+
+    def sort_items(item: Tuple[str, Any]) -> Tuple[bool, str]:
+        """Sort special variables first, then alphabetically."""
+        key, _ = item
+        return (not key.startswith("__"), key.lower())
+
+    items = sorted(scope.items(), key=sort_items) if sort_keys else scope.items()
+    for key, value in items:
+        key_text = Text.assemble(
+            (key, "scope.key.special" if key.startswith("__") else "scope.key"),
+            (" =", "scope.equals"),
+        )
+        items_table.add_row(
+            key_text,
+            Pretty(
+                value,
+                highlighter=highlighter,
+                indent_guides=indent_guides,
+                max_length=max_length,
+                max_string=max_string,
+            ),
+        )
+    return Panel.fit(
+        items_table,
+        title=title,
+        border_style="scope.border",
+        padding=(0, 1),
+    )
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich import print
+
+    print()
+
+    def test(foo: float, bar: float) -> None:
+        list_of_things = [1, 2, 3, None, 4, True, False, "Hello World"]
+        dict_of_things = {
+            "version": "1.1",
+            "method": "confirmFruitPurchase",
+            "params": [["apple", "orange", "mangoes", "pomelo"], 1.123],
+            "id": "194521489",
+        }
+        print(render_scope(locals(), title="[i]locals", sort_keys=False))
+
+    test(20.3423, 3.1427)
+    print()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/screen.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/screen.py
new file mode 100644
index 0000000..7f416e1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/screen.py
@@ -0,0 +1,54 @@
+from typing import Optional, TYPE_CHECKING
+
+from .segment import Segment
+from .style import StyleType
+from ._loop import loop_last
+
+
+if TYPE_CHECKING:
+    from .console import (
+        Console,
+        ConsoleOptions,
+        RenderResult,
+        RenderableType,
+        Group,
+    )
+
+
+class Screen:
+    """A renderable that fills the terminal screen and crops excess.
+
+    Args:
+        renderable (RenderableType): Child renderable.
+        style (StyleType, optional): Optional background style. Defaults to None.
+    """
+
+    renderable: "RenderableType"
+
+    def __init__(
+        self,
+        *renderables: "RenderableType",
+        style: Optional[StyleType] = None,
+        application_mode: bool = False,
+    ) -> None:
+        from pip._vendor.rich.console import Group
+
+        self.renderable = Group(*renderables)
+        self.style = style
+        self.application_mode = application_mode
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        width, height = options.size
+        style = console.get_style(self.style) if self.style else None
+        render_options = options.update(width=width, height=height)
+        lines = console.render_lines(
+            self.renderable or "", render_options, style=style, pad=True
+        )
+        lines = Segment.set_shape(lines, width, height, style=style)
+        new_line = Segment("\n\r") if self.application_mode else Segment.line()
+        for last, line in loop_last(lines):
+            yield from line
+            if not last:
+                yield new_line
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/segment.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/segment.py
new file mode 100644
index 0000000..1ea5435
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/segment.py
@@ -0,0 +1,739 @@
+from enum import IntEnum
+from functools import lru_cache
+from itertools import filterfalse
+from logging import getLogger
+from operator import attrgetter
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Tuple,
+    Type,
+    Union,
+)
+
+from .cells import (
+    _is_single_cell_widths,
+    cached_cell_len,
+    cell_len,
+    get_character_cell_size,
+    set_cell_size,
+)
+from .repr import Result, rich_repr
+from .style import Style
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderResult
+
+log = getLogger("rich")
+
+
+class ControlType(IntEnum):
+    """Non-printable control codes which typically translate to ANSI codes."""
+
+    BELL = 1
+    CARRIAGE_RETURN = 2
+    HOME = 3
+    CLEAR = 4
+    SHOW_CURSOR = 5
+    HIDE_CURSOR = 6
+    ENABLE_ALT_SCREEN = 7
+    DISABLE_ALT_SCREEN = 8
+    CURSOR_UP = 9
+    CURSOR_DOWN = 10
+    CURSOR_FORWARD = 11
+    CURSOR_BACKWARD = 12
+    CURSOR_MOVE_TO_COLUMN = 13
+    CURSOR_MOVE_TO = 14
+    ERASE_IN_LINE = 15
+    SET_WINDOW_TITLE = 16
+
+
+ControlCode = Union[
+    Tuple[ControlType],
+    Tuple[ControlType, Union[int, str]],
+    Tuple[ControlType, int, int],
+]
+
+
+@rich_repr()
+class Segment(NamedTuple):
+    """A piece of text with associated style. Segments are produced by the Console render process and
+    are ultimately converted in to strings to be written to the terminal.
+
+    Args:
+        text (str): A piece of text.
+        style (:class:`~rich.style.Style`, optional): An optional style to apply to the text.
+        control (Tuple[ControlCode], optional): Optional sequence of control codes.
+
+    Attributes:
+        cell_length (int): The cell length of this Segment.
+    """
+
+    text: str
+    style: Optional[Style] = None
+    control: Optional[Sequence[ControlCode]] = None
+
+    @property
+    def cell_length(self) -> int:
+        """The number of terminal cells required to display self.text.
+
+        Returns:
+            int: A number of cells.
+        """
+        text, _style, control = self
+        return 0 if control else cell_len(text)
+
+    def __rich_repr__(self) -> Result:
+        yield self.text
+        if self.control is None:
+            if self.style is not None:
+                yield self.style
+        else:
+            yield self.style
+            yield self.control
+
+    def __bool__(self) -> bool:
+        """Check if the segment contains text."""
+        return bool(self.text)
+
+    @property
+    def is_control(self) -> bool:
+        """Check if the segment contains control codes."""
+        return self.control is not None
+
+    @classmethod
+    @lru_cache(1024 * 16)
+    def _split_cells(cls, segment: "Segment", cut: int) -> Tuple["Segment", "Segment"]:
+
+        text, style, control = segment
+        _Segment = Segment
+
+        cell_length = segment.cell_length
+        if cut >= cell_length:
+            return segment, _Segment("", style, control)
+
+        cell_size = get_character_cell_size
+
+        pos = int((cut / cell_length) * len(text))
+
+        before = text[:pos]
+        cell_pos = cell_len(before)
+        if cell_pos == cut:
+            return (
+                _Segment(before, style, control),
+                _Segment(text[pos:], style, control),
+            )
+        while pos < len(text):
+            char = text[pos]
+            pos += 1
+            cell_pos += cell_size(char)
+            before = text[:pos]
+            if cell_pos == cut:
+                return (
+                    _Segment(before, style, control),
+                    _Segment(text[pos:], style, control),
+                )
+            if cell_pos > cut:
+                return (
+                    _Segment(before[: pos - 1] + " ", style, control),
+                    _Segment(" " + text[pos:], style, control),
+                )
+
+        raise AssertionError("Will never reach here")
+
+    def split_cells(self, cut: int) -> Tuple["Segment", "Segment"]:
+        """Split segment in to two segments at the specified column.
+
+        If the cut point falls in the middle of a 2-cell wide character then it is replaced
+        by two spaces, to preserve the display width of the parent segment.
+
+        Returns:
+            Tuple[Segment, Segment]: Two segments.
+        """
+        text, style, control = self
+
+        if _is_single_cell_widths(text):
+            # Fast path with all 1 cell characters
+            if cut >= len(text):
+                return self, Segment("", style, control)
+            return (
+                Segment(text[:cut], style, control),
+                Segment(text[cut:], style, control),
+            )
+
+        return self._split_cells(self, cut)
+
+    @classmethod
+    def line(cls) -> "Segment":
+        """Make a new line segment."""
+        return cls("\n")
+
+    @classmethod
+    def apply_style(
+        cls,
+        segments: Iterable["Segment"],
+        style: Optional[Style] = None,
+        post_style: Optional[Style] = None,
+    ) -> Iterable["Segment"]:
+        """Apply style(s) to an iterable of segments.
+
+        Returns an iterable of segments where the style is replaced by ``style + segment.style + post_style``.
+
+        Args:
+            segments (Iterable[Segment]): Segments to process.
+            style (Style, optional): Base style. Defaults to None.
+            post_style (Style, optional): Style to apply on top of segment style. Defaults to None.
+
+        Returns:
+            Iterable[Segments]: A new iterable of segments (possibly the same iterable).
+        """
+        result_segments = segments
+        if style:
+            apply = style.__add__
+            result_segments = (
+                cls(text, None if control else apply(_style), control)
+                for text, _style, control in result_segments
+            )
+        if post_style:
+            result_segments = (
+                cls(
+                    text,
+                    (
+                        None
+                        if control
+                        else (_style + post_style if _style else post_style)
+                    ),
+                    control,
+                )
+                for text, _style, control in result_segments
+            )
+        return result_segments
+
+    @classmethod
+    def filter_control(
+        cls, segments: Iterable["Segment"], is_control: bool = False
+    ) -> Iterable["Segment"]:
+        """Filter segments by ``is_control`` attribute.
+
+        Args:
+            segments (Iterable[Segment]): An iterable of Segment instances.
+            is_control (bool, optional): is_control flag to match in search.
+
+        Returns:
+            Iterable[Segment]: And iterable of Segment instances.
+
+        """
+        if is_control:
+            return filter(attrgetter("control"), segments)
+        else:
+            return filterfalse(attrgetter("control"), segments)
+
+    @classmethod
+    def split_lines(cls, segments: Iterable["Segment"]) -> Iterable[List["Segment"]]:
+        """Split a sequence of segments in to a list of lines.
+
+        Args:
+            segments (Iterable[Segment]): Segments potentially containing line feeds.
+
+        Yields:
+            Iterable[List[Segment]]: Iterable of segment lists, one per line.
+        """
+        line: List[Segment] = []
+        append = line.append
+
+        for segment in segments:
+            if "\n" in segment.text and not segment.control:
+                text, style, _ = segment
+                while text:
+                    _text, new_line, text = text.partition("\n")
+                    if _text:
+                        append(cls(_text, style))
+                    if new_line:
+                        yield line
+                        line = []
+                        append = line.append
+            else:
+                append(segment)
+        if line:
+            yield line
+
+    @classmethod
+    def split_and_crop_lines(
+        cls,
+        segments: Iterable["Segment"],
+        length: int,
+        style: Optional[Style] = None,
+        pad: bool = True,
+        include_new_lines: bool = True,
+    ) -> Iterable[List["Segment"]]:
+        """Split segments in to lines, and crop lines greater than a given length.
+
+        Args:
+            segments (Iterable[Segment]): An iterable of segments, probably
+                generated from console.render.
+            length (int): Desired line length.
+            style (Style, optional): Style to use for any padding.
+            pad (bool): Enable padding of lines that are less than `length`.
+
+        Returns:
+            Iterable[List[Segment]]: An iterable of lines of segments.
+        """
+        line: List[Segment] = []
+        append = line.append
+
+        adjust_line_length = cls.adjust_line_length
+        new_line_segment = cls("\n")
+
+        for segment in segments:
+            if "\n" in segment.text and not segment.control:
+                text, segment_style, _ = segment
+                while text:
+                    _text, new_line, text = text.partition("\n")
+                    if _text:
+                        append(cls(_text, segment_style))
+                    if new_line:
+                        cropped_line = adjust_line_length(
+                            line, length, style=style, pad=pad
+                        )
+                        if include_new_lines:
+                            cropped_line.append(new_line_segment)
+                        yield cropped_line
+                        del line[:]
+            else:
+                append(segment)
+        if line:
+            yield adjust_line_length(line, length, style=style, pad=pad)
+
+    @classmethod
+    def adjust_line_length(
+        cls,
+        line: List["Segment"],
+        length: int,
+        style: Optional[Style] = None,
+        pad: bool = True,
+    ) -> List["Segment"]:
+        """Adjust a line to a given width (cropping or padding as required).
+
+        Args:
+            segments (Iterable[Segment]): A list of segments in a single line.
+            length (int): The desired width of the line.
+            style (Style, optional): The style of padding if used (space on the end). Defaults to None.
+            pad (bool, optional): Pad lines with spaces if they are shorter than `length`. Defaults to True.
+
+        Returns:
+            List[Segment]: A line of segments with the desired length.
+        """
+        line_length = sum(segment.cell_length for segment in line)
+        new_line: List[Segment]
+
+        if line_length < length:
+            if pad:
+                new_line = line + [cls(" " * (length - line_length), style)]
+            else:
+                new_line = line[:]
+        elif line_length > length:
+            new_line = []
+            append = new_line.append
+            line_length = 0
+            for segment in line:
+                segment_length = segment.cell_length
+                if line_length + segment_length < length or segment.control:
+                    append(segment)
+                    line_length += segment_length
+                else:
+                    text, segment_style, _ = segment
+                    text = set_cell_size(text, length - line_length)
+                    append(cls(text, segment_style))
+                    break
+        else:
+            new_line = line[:]
+        return new_line
+
+    @classmethod
+    def get_line_length(cls, line: List["Segment"]) -> int:
+        """Get the length of list of segments.
+
+        Args:
+            line (List[Segment]): A line encoded as a list of Segments (assumes no '\\\\n' characters),
+
+        Returns:
+            int: The length of the line.
+        """
+        _cell_len = cell_len
+        return sum(_cell_len(segment.text) for segment in line)
+
+    @classmethod
+    def get_shape(cls, lines: List[List["Segment"]]) -> Tuple[int, int]:
+        """Get the shape (enclosing rectangle) of a list of lines.
+
+        Args:
+            lines (List[List[Segment]]): A list of lines (no '\\\\n' characters).
+
+        Returns:
+            Tuple[int, int]: Width and height in characters.
+        """
+        get_line_length = cls.get_line_length
+        max_width = max(get_line_length(line) for line in lines) if lines else 0
+        return (max_width, len(lines))
+
+    @classmethod
+    def set_shape(
+        cls,
+        lines: List[List["Segment"]],
+        width: int,
+        height: Optional[int] = None,
+        style: Optional[Style] = None,
+        new_lines: bool = False,
+    ) -> List[List["Segment"]]:
+        """Set the shape of a list of lines (enclosing rectangle).
+
+        Args:
+            lines (List[List[Segment]]): A list of lines.
+            width (int): Desired width.
+            height (int, optional): Desired height or None for no change.
+            style (Style, optional): Style of any padding added.
+            new_lines (bool, optional): Padded lines should include "\n". Defaults to False.
+
+        Returns:
+            List[List[Segment]]: New list of lines.
+        """
+        _height = height or len(lines)
+
+        blank = (
+            [cls(" " * width + "\n", style)] if new_lines else [cls(" " * width, style)]
+        )
+
+        adjust_line_length = cls.adjust_line_length
+        shaped_lines = lines[:_height]
+        shaped_lines[:] = [
+            adjust_line_length(line, width, style=style) for line in lines
+        ]
+        if len(shaped_lines) < _height:
+            shaped_lines.extend([blank] * (_height - len(shaped_lines)))
+        return shaped_lines
+
+    @classmethod
+    def align_top(
+        cls: Type["Segment"],
+        lines: List[List["Segment"]],
+        width: int,
+        height: int,
+        style: Style,
+        new_lines: bool = False,
+    ) -> List[List["Segment"]]:
+        """Aligns lines to top (adds extra lines to bottom as required).
+
+        Args:
+            lines (List[List[Segment]]): A list of lines.
+            width (int): Desired width.
+            height (int, optional): Desired height or None for no change.
+            style (Style): Style of any padding added.
+            new_lines (bool, optional): Padded lines should include "\n". Defaults to False.
+
+        Returns:
+            List[List[Segment]]: New list of lines.
+        """
+        extra_lines = height - len(lines)
+        if not extra_lines:
+            return lines[:]
+        lines = lines[:height]
+        blank = cls(" " * width + "\n", style) if new_lines else cls(" " * width, style)
+        lines = lines + [[blank]] * extra_lines
+        return lines
+
+    @classmethod
+    def align_bottom(
+        cls: Type["Segment"],
+        lines: List[List["Segment"]],
+        width: int,
+        height: int,
+        style: Style,
+        new_lines: bool = False,
+    ) -> List[List["Segment"]]:
+        """Aligns render to bottom (adds extra lines above as required).
+
+        Args:
+            lines (List[List[Segment]]): A list of lines.
+            width (int): Desired width.
+            height (int, optional): Desired height or None for no change.
+            style (Style): Style of any padding added. Defaults to None.
+            new_lines (bool, optional): Padded lines should include "\n". Defaults to False.
+
+        Returns:
+            List[List[Segment]]: New list of lines.
+        """
+        extra_lines = height - len(lines)
+        if not extra_lines:
+            return lines[:]
+        lines = lines[:height]
+        blank = cls(" " * width + "\n", style) if new_lines else cls(" " * width, style)
+        lines = [[blank]] * extra_lines + lines
+        return lines
+
+    @classmethod
+    def align_middle(
+        cls: Type["Segment"],
+        lines: List[List["Segment"]],
+        width: int,
+        height: int,
+        style: Style,
+        new_lines: bool = False,
+    ) -> List[List["Segment"]]:
+        """Aligns lines to middle (adds extra lines to above and below as required).
+
+        Args:
+            lines (List[List[Segment]]): A list of lines.
+            width (int): Desired width.
+            height (int, optional): Desired height or None for no change.
+            style (Style): Style of any padding added.
+            new_lines (bool, optional): Padded lines should include "\n". Defaults to False.
+
+        Returns:
+            List[List[Segment]]: New list of lines.
+        """
+        extra_lines = height - len(lines)
+        if not extra_lines:
+            return lines[:]
+        lines = lines[:height]
+        blank = cls(" " * width + "\n", style) if new_lines else cls(" " * width, style)
+        top_lines = extra_lines // 2
+        bottom_lines = extra_lines - top_lines
+        lines = [[blank]] * top_lines + lines + [[blank]] * bottom_lines
+        return lines
+
+    @classmethod
+    def simplify(cls, segments: Iterable["Segment"]) -> Iterable["Segment"]:
+        """Simplify an iterable of segments by combining contiguous segments with the same style.
+
+        Args:
+            segments (Iterable[Segment]): An iterable of segments.
+
+        Returns:
+            Iterable[Segment]: A possibly smaller iterable of segments that will render the same way.
+        """
+        iter_segments = iter(segments)
+        try:
+            last_segment = next(iter_segments)
+        except StopIteration:
+            return
+
+        _Segment = Segment
+        for segment in iter_segments:
+            if last_segment.style == segment.style and not segment.control:
+                last_segment = _Segment(
+                    last_segment.text + segment.text, last_segment.style
+                )
+            else:
+                yield last_segment
+                last_segment = segment
+        yield last_segment
+
+    @classmethod
+    def strip_links(cls, segments: Iterable["Segment"]) -> Iterable["Segment"]:
+        """Remove all links from an iterable of styles.
+
+        Args:
+            segments (Iterable[Segment]): An iterable segments.
+
+        Yields:
+            Segment: Segments with link removed.
+        """
+        for segment in segments:
+            if segment.control or segment.style is None:
+                yield segment
+            else:
+                text, style, _control = segment
+                yield cls(text, style.update_link(None) if style else None)
+
+    @classmethod
+    def strip_styles(cls, segments: Iterable["Segment"]) -> Iterable["Segment"]:
+        """Remove all styles from an iterable of segments.
+
+        Args:
+            segments (Iterable[Segment]): An iterable segments.
+
+        Yields:
+            Segment: Segments with styles replace with None
+        """
+        for text, _style, control in segments:
+            yield cls(text, None, control)
+
+    @classmethod
+    def remove_color(cls, segments: Iterable["Segment"]) -> Iterable["Segment"]:
+        """Remove all color from an iterable of segments.
+
+        Args:
+            segments (Iterable[Segment]): An iterable segments.
+
+        Yields:
+            Segment: Segments with colorless style.
+        """
+
+        cache: Dict[Style, Style] = {}
+        for text, style, control in segments:
+            if style:
+                colorless_style = cache.get(style)
+                if colorless_style is None:
+                    colorless_style = style.without_color
+                    cache[style] = colorless_style
+                yield cls(text, colorless_style, control)
+            else:
+                yield cls(text, None, control)
+
+    @classmethod
+    def divide(
+        cls, segments: Iterable["Segment"], cuts: Iterable[int]
+    ) -> Iterable[List["Segment"]]:
+        """Divides an iterable of segments in to portions.
+
+        Args:
+            cuts (Iterable[int]): Cell positions where to divide.
+
+        Yields:
+            [Iterable[List[Segment]]]: An iterable of Segments in List.
+        """
+        split_segments: List["Segment"] = []
+        add_segment = split_segments.append
+
+        iter_cuts = iter(cuts)
+
+        while True:
+            cut = next(iter_cuts, -1)
+            if cut == -1:
+                return []
+            if cut != 0:
+                break
+            yield []
+        pos = 0
+
+        segments_clear = split_segments.clear
+        segments_copy = split_segments.copy
+
+        _cell_len = cached_cell_len
+        for segment in segments:
+            text, _style, control = segment
+            while text:
+                end_pos = pos if control else pos + _cell_len(text)
+                if end_pos < cut:
+                    add_segment(segment)
+                    pos = end_pos
+                    break
+
+                if end_pos == cut:
+                    add_segment(segment)
+                    yield segments_copy()
+                    segments_clear()
+                    pos = end_pos
+
+                    cut = next(iter_cuts, -1)
+                    if cut == -1:
+                        if split_segments:
+                            yield segments_copy()
+                        return
+
+                    break
+
+                else:
+                    before, segment = segment.split_cells(cut - pos)
+                    text, _style, control = segment
+                    add_segment(before)
+                    yield segments_copy()
+                    segments_clear()
+                    pos = cut
+
+                cut = next(iter_cuts, -1)
+                if cut == -1:
+                    if split_segments:
+                        yield segments_copy()
+                    return
+
+        yield segments_copy()
+
+
+class Segments:
+    """A simple renderable to render an iterable of segments. This class may be useful if
+    you want to print segments outside of a __rich_console__ method.
+
+    Args:
+        segments (Iterable[Segment]): An iterable of segments.
+        new_lines (bool, optional): Add new lines between segments. Defaults to False.
+    """
+
+    def __init__(self, segments: Iterable[Segment], new_lines: bool = False) -> None:
+        self.segments = list(segments)
+        self.new_lines = new_lines
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        if self.new_lines:
+            line = Segment.line()
+            for segment in self.segments:
+                yield segment
+                yield line
+        else:
+            yield from self.segments
+
+
+class SegmentLines:
+    def __init__(self, lines: Iterable[List[Segment]], new_lines: bool = False) -> None:
+        """A simple renderable containing a number of lines of segments. May be used as an intermediate
+        in rendering process.
+
+        Args:
+            lines (Iterable[List[Segment]]): Lists of segments forming lines.
+            new_lines (bool, optional): Insert new lines after each line. Defaults to False.
+        """
+        self.lines = list(lines)
+        self.new_lines = new_lines
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        if self.new_lines:
+            new_line = Segment.line()
+            for line in self.lines:
+                yield from line
+                yield new_line
+        else:
+            for line in self.lines:
+                yield from line
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console
+    from pip._vendor.rich.syntax import Syntax
+    from pip._vendor.rich.text import Text
+
+    code = """from rich.console import Console
+console = Console()
+text = Text.from_markup("Hello, [bold magenta]World[/]!")
+console.print(text)"""
+
+    text = Text.from_markup("Hello, [bold magenta]World[/]!")
+
+    console = Console()
+
+    console.rule("rich.Segment")
+    console.print(
+        "A Segment is the last step in the Rich render process before generating text with ANSI codes."
+    )
+    console.print("\nConsider the following code:\n")
+    console.print(Syntax(code, "python", line_numbers=True))
+    console.print()
+    console.print(
+        "When you call [b]print()[/b], Rich [i]renders[/i] the object in to the the following:\n"
+    )
+    fragments = list(console.render(text))
+    console.print(fragments)
+    console.print()
+    console.print("The Segments are then processed to produce the following output:\n")
+    console.print(text)
+    console.print(
+        "\nYou will only need to know this if you are implementing your own Rich renderables."
+    )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/spinner.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/spinner.py
new file mode 100644
index 0000000..0879088
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/spinner.py
@@ -0,0 +1,136 @@
+from typing import cast, List, Optional, TYPE_CHECKING, Union
+
+from ._spinners import SPINNERS
+from .measure import Measurement
+from .table import Table
+from .text import Text
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderResult, RenderableType
+    from .style import StyleType
+
+
+class Spinner:
+    def __init__(
+        self,
+        name: str,
+        text: "RenderableType" = "",
+        *,
+        style: Optional["StyleType"] = None,
+        speed: float = 1.0,
+    ) -> None:
+        """A spinner animation.
+
+        Args:
+            name (str): Name of spinner (run python -m rich.spinner).
+            text (RenderableType, optional): A renderable to display at the right of the spinner (str or Text typically). Defaults to "".
+            style (StyleType, optional): Style for spinner animation. Defaults to None.
+            speed (float, optional): Speed factor for animation. Defaults to 1.0.
+
+        Raises:
+            KeyError: If name isn't one of the supported spinner animations.
+        """
+        try:
+            spinner = SPINNERS[name]
+        except KeyError:
+            raise KeyError(f"no spinner called {name!r}")
+        self.text: "Union[RenderableType, Text]" = (
+            Text.from_markup(text) if isinstance(text, str) else text
+        )
+        self.frames = cast(List[str], spinner["frames"])[:]
+        self.interval = cast(float, spinner["interval"])
+        self.start_time: Optional[float] = None
+        self.style = style
+        self.speed = speed
+        self.frame_no_offset: float = 0.0
+        self._update_speed = 0.0
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        yield self.render(console.get_time())
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        text = self.render(0)
+        return Measurement.get(console, options, text)
+
+    def render(self, time: float) -> "RenderableType":
+        """Render the spinner for a given time.
+
+        Args:
+            time (float): Time in seconds.
+
+        Returns:
+            RenderableType: A renderable containing animation frame.
+        """
+        if self.start_time is None:
+            self.start_time = time
+
+        frame_no = ((time - self.start_time) * self.speed) / (
+            self.interval / 1000.0
+        ) + self.frame_no_offset
+        frame = Text(
+            self.frames[int(frame_no) % len(self.frames)], style=self.style or ""
+        )
+
+        if self._update_speed:
+            self.frame_no_offset = frame_no
+            self.start_time = time
+            self.speed = self._update_speed
+            self._update_speed = 0.0
+
+        if not self.text:
+            return frame
+        elif isinstance(self.text, (str, Text)):
+            return Text.assemble(frame, " ", self.text)
+        else:
+            table = Table.grid(padding=1)
+            table.add_row(frame, self.text)
+            return table
+
+    def update(
+        self,
+        *,
+        text: "RenderableType" = "",
+        style: Optional["StyleType"] = None,
+        speed: Optional[float] = None,
+    ) -> None:
+        """Updates attributes of a spinner after it has been started.
+
+        Args:
+            text (RenderableType, optional): A renderable to display at the right of the spinner (str or Text typically). Defaults to "".
+            style (StyleType, optional): Style for spinner animation. Defaults to None.
+            speed (float, optional): Speed factor for animation. Defaults to None.
+        """
+        if text:
+            self.text = Text.from_markup(text) if isinstance(text, str) else text
+        if style:
+            self.style = style
+        if speed:
+            self._update_speed = speed
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from time import sleep
+
+    from .columns import Columns
+    from .panel import Panel
+    from .live import Live
+
+    all_spinners = Columns(
+        [
+            Spinner(spinner_name, text=Text(repr(spinner_name), style="green"))
+            for spinner_name in sorted(SPINNERS.keys())
+        ],
+        column_first=True,
+        expand=True,
+    )
+
+    with Live(
+        Panel(all_spinners, title="Spinners", border_style="blue"),
+        refresh_per_second=20,
+    ) as live:
+        while True:
+            sleep(0.1)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/status.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/status.py
new file mode 100644
index 0000000..09eff40
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/status.py
@@ -0,0 +1,132 @@
+from types import TracebackType
+from typing import Optional, Type
+
+from .console import Console, RenderableType
+from .jupyter import JupyterMixin
+from .live import Live
+from .spinner import Spinner
+from .style import StyleType
+
+
+class Status(JupyterMixin):
+    """Displays a status indicator with a 'spinner' animation.
+
+    Args:
+        status (RenderableType): A status renderable (str or Text typically).
+        console (Console, optional): Console instance to use, or None for global console. Defaults to None.
+        spinner (str, optional): Name of spinner animation (see python -m rich.spinner). Defaults to "dots".
+        spinner_style (StyleType, optional): Style of spinner. Defaults to "status.spinner".
+        speed (float, optional): Speed factor for spinner animation. Defaults to 1.0.
+        refresh_per_second (float, optional): Number of refreshes per second. Defaults to 12.5.
+    """
+
+    def __init__(
+        self,
+        status: RenderableType,
+        *,
+        console: Optional[Console] = None,
+        spinner: str = "dots",
+        spinner_style: StyleType = "status.spinner",
+        speed: float = 1.0,
+        refresh_per_second: float = 12.5,
+    ):
+        self.status = status
+        self.spinner_style = spinner_style
+        self.speed = speed
+        self._spinner = Spinner(spinner, text=status, style=spinner_style, speed=speed)
+        self._live = Live(
+            self.renderable,
+            console=console,
+            refresh_per_second=refresh_per_second,
+            transient=True,
+        )
+
+    @property
+    def renderable(self) -> Spinner:
+        return self._spinner
+
+    @property
+    def console(self) -> "Console":
+        """Get the Console used by the Status objects."""
+        return self._live.console
+
+    def update(
+        self,
+        status: Optional[RenderableType] = None,
+        *,
+        spinner: Optional[str] = None,
+        spinner_style: Optional[StyleType] = None,
+        speed: Optional[float] = None,
+    ) -> None:
+        """Update status.
+
+        Args:
+            status (Optional[RenderableType], optional): New status renderable or None for no change. Defaults to None.
+            spinner (Optional[str], optional): New spinner or None for no change. Defaults to None.
+            spinner_style (Optional[StyleType], optional): New spinner style or None for no change. Defaults to None.
+            speed (Optional[float], optional): Speed factor for spinner animation or None for no change. Defaults to None.
+        """
+        if status is not None:
+            self.status = status
+        if spinner_style is not None:
+            self.spinner_style = spinner_style
+        if speed is not None:
+            self.speed = speed
+        if spinner is not None:
+            self._spinner = Spinner(
+                spinner, text=self.status, style=self.spinner_style, speed=self.speed
+            )
+            self._live.update(self.renderable, refresh=True)
+        else:
+            self._spinner.update(
+                text=self.status, style=self.spinner_style, speed=self.speed
+            )
+
+    def start(self) -> None:
+        """Start the status animation."""
+        self._live.start()
+
+    def stop(self) -> None:
+        """Stop the spinner animation."""
+        self._live.stop()
+
+    def __rich__(self) -> RenderableType:
+        return self.renderable
+
+    def __enter__(self) -> "Status":
+        self.start()
+        return self
+
+    def __exit__(
+        self,
+        exc_type: Optional[Type[BaseException]],
+        exc_val: Optional[BaseException],
+        exc_tb: Optional[TracebackType],
+    ) -> None:
+        self.stop()
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from time import sleep
+
+    from .console import Console
+
+    console = Console()
+    with console.status("[magenta]Covid detector booting up") as status:
+        sleep(3)
+        console.log("Importing advanced AI")
+        sleep(3)
+        console.log("Advanced Covid AI Ready")
+        sleep(3)
+        status.update(status="[bold blue] Scanning for Covid", spinner="earth")
+        sleep(3)
+        console.log("Found 10,000,000,000 copies of Covid32.exe")
+        sleep(3)
+        status.update(
+            status="[bold red]Moving Covid32.exe to Trash",
+            spinner="bouncingBall",
+            spinner_style="yellow",
+        )
+        sleep(5)
+    console.print("[bold green]Covid deleted successfully")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/style.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/style.py
new file mode 100644
index 0000000..b2e8aff
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/style.py
@@ -0,0 +1,771 @@
+import sys
+from functools import lru_cache
+from marshal import dumps, loads
+from random import randint
+from typing import Any, Dict, Iterable, List, Optional, Type, Union, cast
+
+from . import errors
+from .color import Color, ColorParseError, ColorSystem, blend_rgb
+from .repr import Result, rich_repr
+from .terminal_theme import DEFAULT_TERMINAL_THEME, TerminalTheme
+
+# Style instances and style definitions are often interchangeable
+StyleType = Union[str, "Style"]
+
+
+class _Bit:
+    """A descriptor to get/set a style attribute bit."""
+
+    __slots__ = ["bit"]
+
+    def __init__(self, bit_no: int) -> None:
+        self.bit = 1 << bit_no
+
+    def __get__(self, obj: "Style", objtype: Type["Style"]) -> Optional[bool]:
+        if obj._set_attributes & self.bit:
+            return obj._attributes & self.bit != 0
+        return None
+
+
+@rich_repr
+class Style:
+    """A terminal style.
+
+    A terminal style consists of a color (`color`), a background color (`bgcolor`), and a number of attributes, such
+    as bold, italic etc. The attributes have 3 states: they can either be on
+    (``True``), off (``False``), or not set (``None``).
+
+    Args:
+        color (Union[Color, str], optional): Color of terminal text. Defaults to None.
+        bgcolor (Union[Color, str], optional): Color of terminal background. Defaults to None.
+        bold (bool, optional): Enable bold text. Defaults to None.
+        dim (bool, optional): Enable dim text. Defaults to None.
+        italic (bool, optional): Enable italic text. Defaults to None.
+        underline (bool, optional): Enable underlined text. Defaults to None.
+        blink (bool, optional): Enabled blinking text. Defaults to None.
+        blink2 (bool, optional): Enable fast blinking text. Defaults to None.
+        reverse (bool, optional): Enabled reverse text. Defaults to None.
+        conceal (bool, optional): Enable concealed text. Defaults to None.
+        strike (bool, optional): Enable strikethrough text. Defaults to None.
+        underline2 (bool, optional): Enable doubly underlined text. Defaults to None.
+        frame (bool, optional): Enable framed text. Defaults to None.
+        encircle (bool, optional): Enable encircled text. Defaults to None.
+        overline (bool, optional): Enable overlined text. Defaults to None.
+        link (str, link): Link URL. Defaults to None.
+
+    """
+
+    _color: Optional[Color]
+    _bgcolor: Optional[Color]
+    _attributes: int
+    _set_attributes: int
+    _hash: Optional[int]
+    _null: bool
+    _meta: Optional[bytes]
+
+    __slots__ = [
+        "_color",
+        "_bgcolor",
+        "_attributes",
+        "_set_attributes",
+        "_link",
+        "_link_id",
+        "_ansi",
+        "_style_definition",
+        "_hash",
+        "_null",
+        "_meta",
+    ]
+
+    # maps bits on to SGR parameter
+    _style_map = {
+        0: "1",
+        1: "2",
+        2: "3",
+        3: "4",
+        4: "5",
+        5: "6",
+        6: "7",
+        7: "8",
+        8: "9",
+        9: "21",
+        10: "51",
+        11: "52",
+        12: "53",
+    }
+
+    STYLE_ATTRIBUTES = {
+        "dim": "dim",
+        "d": "dim",
+        "bold": "bold",
+        "b": "bold",
+        "italic": "italic",
+        "i": "italic",
+        "underline": "underline",
+        "u": "underline",
+        "blink": "blink",
+        "blink2": "blink2",
+        "reverse": "reverse",
+        "r": "reverse",
+        "conceal": "conceal",
+        "c": "conceal",
+        "strike": "strike",
+        "s": "strike",
+        "underline2": "underline2",
+        "uu": "underline2",
+        "frame": "frame",
+        "encircle": "encircle",
+        "overline": "overline",
+        "o": "overline",
+    }
+
+    def __init__(
+        self,
+        *,
+        color: Optional[Union[Color, str]] = None,
+        bgcolor: Optional[Union[Color, str]] = None,
+        bold: Optional[bool] = None,
+        dim: Optional[bool] = None,
+        italic: Optional[bool] = None,
+        underline: Optional[bool] = None,
+        blink: Optional[bool] = None,
+        blink2: Optional[bool] = None,
+        reverse: Optional[bool] = None,
+        conceal: Optional[bool] = None,
+        strike: Optional[bool] = None,
+        underline2: Optional[bool] = None,
+        frame: Optional[bool] = None,
+        encircle: Optional[bool] = None,
+        overline: Optional[bool] = None,
+        link: Optional[str] = None,
+        meta: Optional[Dict[str, Any]] = None,
+    ):
+        self._ansi: Optional[str] = None
+        self._style_definition: Optional[str] = None
+
+        def _make_color(color: Union[Color, str]) -> Color:
+            return color if isinstance(color, Color) else Color.parse(color)
+
+        self._color = None if color is None else _make_color(color)
+        self._bgcolor = None if bgcolor is None else _make_color(bgcolor)
+        self._set_attributes = sum(
+            (
+                bold is not None,
+                dim is not None and 2,
+                italic is not None and 4,
+                underline is not None and 8,
+                blink is not None and 16,
+                blink2 is not None and 32,
+                reverse is not None and 64,
+                conceal is not None and 128,
+                strike is not None and 256,
+                underline2 is not None and 512,
+                frame is not None and 1024,
+                encircle is not None and 2048,
+                overline is not None and 4096,
+            )
+        )
+        self._attributes = (
+            sum(
+                (
+                    bold and 1 or 0,
+                    dim and 2 or 0,
+                    italic and 4 or 0,
+                    underline and 8 or 0,
+                    blink and 16 or 0,
+                    blink2 and 32 or 0,
+                    reverse and 64 or 0,
+                    conceal and 128 or 0,
+                    strike and 256 or 0,
+                    underline2 and 512 or 0,
+                    frame and 1024 or 0,
+                    encircle and 2048 or 0,
+                    overline and 4096 or 0,
+                )
+            )
+            if self._set_attributes
+            else 0
+        )
+
+        self._link = link
+        self._link_id = f"{randint(0, 999999)}" if link else ""
+        self._meta = None if meta is None else dumps(meta)
+        self._hash: Optional[int] = None
+        self._null = not (self._set_attributes or color or bgcolor or link or meta)
+
+    @classmethod
+    def null(cls) -> "Style":
+        """Create an 'null' style, equivalent to Style(), but more performant."""
+        return NULL_STYLE
+
+    @classmethod
+    def from_color(
+        cls, color: Optional[Color] = None, bgcolor: Optional[Color] = None
+    ) -> "Style":
+        """Create a new style with colors and no attributes.
+
+        Returns:
+            color (Optional[Color]): A (foreground) color, or None for no color. Defaults to None.
+            bgcolor (Optional[Color]): A (background) color, or None for no color. Defaults to None.
+        """
+        style: Style = cls.__new__(Style)
+        style._ansi = None
+        style._style_definition = None
+        style._color = color
+        style._bgcolor = bgcolor
+        style._set_attributes = 0
+        style._attributes = 0
+        style._link = None
+        style._link_id = ""
+        style._meta = None
+        style._null = not (color or bgcolor)
+        style._hash = None
+        return style
+
+    @classmethod
+    def from_meta(cls, meta: Optional[Dict[str, Any]]) -> "Style":
+        """Create a new style with meta data.
+
+        Returns:
+            meta (Optional[Dict[str, Any]]): A dictionary of meta data. Defaults to None.
+        """
+        style: Style = cls.__new__(Style)
+        style._ansi = None
+        style._style_definition = None
+        style._color = None
+        style._bgcolor = None
+        style._set_attributes = 0
+        style._attributes = 0
+        style._link = None
+        style._link_id = ""
+        style._meta = dumps(meta)
+        style._hash = None
+        style._null = not (meta)
+        return style
+
+    @classmethod
+    def on(cls, meta: Optional[Dict[str, Any]] = None, **handlers: Any) -> "Style":
+        """Create a blank style with meta information.
+
+        Example:
+            style = Style.on(click=self.on_click)
+
+        Args:
+            meta (Optional[Dict[str, Any]], optional): An optional dict of meta information.
+            **handlers (Any): Keyword arguments are translated in to handlers.
+
+        Returns:
+            Style: A Style with meta information attached.
+        """
+        meta = {} if meta is None else meta
+        meta.update({f"@{key}": value for key, value in handlers.items()})
+        return cls.from_meta(meta)
+
+    bold = _Bit(0)
+    dim = _Bit(1)
+    italic = _Bit(2)
+    underline = _Bit(3)
+    blink = _Bit(4)
+    blink2 = _Bit(5)
+    reverse = _Bit(6)
+    conceal = _Bit(7)
+    strike = _Bit(8)
+    underline2 = _Bit(9)
+    frame = _Bit(10)
+    encircle = _Bit(11)
+    overline = _Bit(12)
+
+    @property
+    def link_id(self) -> str:
+        """Get a link id, used in ansi code for links."""
+        return self._link_id
+
+    def __str__(self) -> str:
+        """Re-generate style definition from attributes."""
+        if self._style_definition is None:
+            attributes: List[str] = []
+            append = attributes.append
+            bits = self._set_attributes
+            if bits & 0b0000000001111:
+                if bits & 1:
+                    append("bold" if self.bold else "not bold")
+                if bits & (1 << 1):
+                    append("dim" if self.dim else "not dim")
+                if bits & (1 << 2):
+                    append("italic" if self.italic else "not italic")
+                if bits & (1 << 3):
+                    append("underline" if self.underline else "not underline")
+            if bits & 0b0000111110000:
+                if bits & (1 << 4):
+                    append("blink" if self.blink else "not blink")
+                if bits & (1 << 5):
+                    append("blink2" if self.blink2 else "not blink2")
+                if bits & (1 << 6):
+                    append("reverse" if self.reverse else "not reverse")
+                if bits & (1 << 7):
+                    append("conceal" if self.conceal else "not conceal")
+                if bits & (1 << 8):
+                    append("strike" if self.strike else "not strike")
+            if bits & 0b1111000000000:
+                if bits & (1 << 9):
+                    append("underline2" if self.underline2 else "not underline2")
+                if bits & (1 << 10):
+                    append("frame" if self.frame else "not frame")
+                if bits & (1 << 11):
+                    append("encircle" if self.encircle else "not encircle")
+                if bits & (1 << 12):
+                    append("overline" if self.overline else "not overline")
+            if self._color is not None:
+                append(self._color.name)
+            if self._bgcolor is not None:
+                append("on")
+                append(self._bgcolor.name)
+            if self._link:
+                append("link")
+                append(self._link)
+            self._style_definition = " ".join(attributes) or "none"
+        return self._style_definition
+
+    def __bool__(self) -> bool:
+        """A Style is false if it has no attributes, colors, or links."""
+        return not self._null
+
+    def _make_ansi_codes(self, color_system: ColorSystem) -> str:
+        """Generate ANSI codes for this style.
+
+        Args:
+            color_system (ColorSystem): Color system.
+
+        Returns:
+            str: String containing codes.
+        """
+
+        if self._ansi is None:
+            sgr: List[str] = []
+            append = sgr.append
+            _style_map = self._style_map
+            attributes = self._attributes & self._set_attributes
+            if attributes:
+                if attributes & 1:
+                    append(_style_map[0])
+                if attributes & 2:
+                    append(_style_map[1])
+                if attributes & 4:
+                    append(_style_map[2])
+                if attributes & 8:
+                    append(_style_map[3])
+                if attributes & 0b0000111110000:
+                    for bit in range(4, 9):
+                        if attributes & (1 << bit):
+                            append(_style_map[bit])
+                if attributes & 0b1111000000000:
+                    for bit in range(9, 13):
+                        if attributes & (1 << bit):
+                            append(_style_map[bit])
+            if self._color is not None:
+                sgr.extend(self._color.downgrade(color_system).get_ansi_codes())
+            if self._bgcolor is not None:
+                sgr.extend(
+                    self._bgcolor.downgrade(color_system).get_ansi_codes(
+                        foreground=False
+                    )
+                )
+            self._ansi = ";".join(sgr)
+        return self._ansi
+
+    @classmethod
+    @lru_cache(maxsize=1024)
+    def normalize(cls, style: str) -> str:
+        """Normalize a style definition so that styles with the same effect have the same string
+        representation.
+
+        Args:
+            style (str): A style definition.
+
+        Returns:
+            str: Normal form of style definition.
+        """
+        try:
+            return str(cls.parse(style))
+        except errors.StyleSyntaxError:
+            return style.strip().lower()
+
+    @classmethod
+    def pick_first(cls, *values: Optional[StyleType]) -> StyleType:
+        """Pick first non-None style."""
+        for value in values:
+            if value is not None:
+                return value
+        raise ValueError("expected at least one non-None style")
+
+    def __rich_repr__(self) -> Result:
+        yield "color", self.color, None
+        yield "bgcolor", self.bgcolor, None
+        yield "bold", self.bold, None,
+        yield "dim", self.dim, None,
+        yield "italic", self.italic, None
+        yield "underline", self.underline, None,
+        yield "blink", self.blink, None
+        yield "blink2", self.blink2, None
+        yield "reverse", self.reverse, None
+        yield "conceal", self.conceal, None
+        yield "strike", self.strike, None
+        yield "underline2", self.underline2, None
+        yield "frame", self.frame, None
+        yield "encircle", self.encircle, None
+        yield "link", self.link, None
+        if self._meta:
+            yield "meta", self.meta
+
+    def __eq__(self, other: Any) -> bool:
+        if not isinstance(other, Style):
+            return NotImplemented
+        return self.__hash__() == other.__hash__()
+
+    def __ne__(self, other: Any) -> bool:
+        if not isinstance(other, Style):
+            return NotImplemented
+        return self.__hash__() != other.__hash__()
+
+    def __hash__(self) -> int:
+        if self._hash is not None:
+            return self._hash
+        self._hash = hash(
+            (
+                self._color,
+                self._bgcolor,
+                self._attributes,
+                self._set_attributes,
+                self._link,
+                self._meta,
+            )
+        )
+        return self._hash
+
+    @property
+    def color(self) -> Optional[Color]:
+        """The foreground color or None if it is not set."""
+        return self._color
+
+    @property
+    def bgcolor(self) -> Optional[Color]:
+        """The background color or None if it is not set."""
+        return self._bgcolor
+
+    @property
+    def link(self) -> Optional[str]:
+        """Link text, if set."""
+        return self._link
+
+    @property
+    def transparent_background(self) -> bool:
+        """Check if the style specified a transparent background."""
+        return self.bgcolor is None or self.bgcolor.is_default
+
+    @property
+    def background_style(self) -> "Style":
+        """A Style with background only."""
+        return Style(bgcolor=self.bgcolor)
+
+    @property
+    def meta(self) -> Dict[str, Any]:
+        """Get meta information (can not be changed after construction)."""
+        return {} if self._meta is None else cast(Dict[str, Any], loads(self._meta))
+
+    @property
+    def without_color(self) -> "Style":
+        """Get a copy of the style with color removed."""
+        if self._null:
+            return NULL_STYLE
+        style: Style = self.__new__(Style)
+        style._ansi = None
+        style._style_definition = None
+        style._color = None
+        style._bgcolor = None
+        style._attributes = self._attributes
+        style._set_attributes = self._set_attributes
+        style._link = self._link
+        style._link_id = f"{randint(0, 999999)}" if self._link else ""
+        style._null = False
+        style._meta = None
+        style._hash = None
+        return style
+
+    @classmethod
+    @lru_cache(maxsize=4096)
+    def parse(cls, style_definition: str) -> "Style":
+        """Parse a style definition.
+
+        Args:
+            style_definition (str): A string containing a style.
+
+        Raises:
+            errors.StyleSyntaxError: If the style definition syntax is invalid.
+
+        Returns:
+            `Style`: A Style instance.
+        """
+        if style_definition.strip() == "none" or not style_definition:
+            return cls.null()
+
+        STYLE_ATTRIBUTES = cls.STYLE_ATTRIBUTES
+        color: Optional[str] = None
+        bgcolor: Optional[str] = None
+        attributes: Dict[str, Optional[Any]] = {}
+        link: Optional[str] = None
+
+        words = iter(style_definition.split())
+        for original_word in words:
+            word = original_word.lower()
+            if word == "on":
+                word = next(words, "")
+                if not word:
+                    raise errors.StyleSyntaxError("color expected after 'on'")
+                try:
+                    Color.parse(word) is None
+                except ColorParseError as error:
+                    raise errors.StyleSyntaxError(
+                        f"unable to parse {word!r} as background color; {error}"
+                    ) from None
+                bgcolor = word
+
+            elif word == "not":
+                word = next(words, "")
+                attribute = STYLE_ATTRIBUTES.get(word)
+                if attribute is None:
+                    raise errors.StyleSyntaxError(
+                        f"expected style attribute after 'not', found {word!r}"
+                    )
+                attributes[attribute] = False
+
+            elif word == "link":
+                word = next(words, "")
+                if not word:
+                    raise errors.StyleSyntaxError("URL expected after 'link'")
+                link = word
+
+            elif word in STYLE_ATTRIBUTES:
+                attributes[STYLE_ATTRIBUTES[word]] = True
+
+            else:
+                try:
+                    Color.parse(word)
+                except ColorParseError as error:
+                    raise errors.StyleSyntaxError(
+                        f"unable to parse {word!r} as color; {error}"
+                    ) from None
+                color = word
+        style = Style(color=color, bgcolor=bgcolor, link=link, **attributes)
+        return style
+
+    @lru_cache(maxsize=1024)
+    def get_html_style(self, theme: Optional[TerminalTheme] = None) -> str:
+        """Get a CSS style rule."""
+        theme = theme or DEFAULT_TERMINAL_THEME
+        css: List[str] = []
+        append = css.append
+
+        color = self.color
+        bgcolor = self.bgcolor
+        if self.reverse:
+            color, bgcolor = bgcolor, color
+        if self.dim:
+            foreground_color = (
+                theme.foreground_color if color is None else color.get_truecolor(theme)
+            )
+            color = Color.from_triplet(
+                blend_rgb(foreground_color, theme.background_color, 0.5)
+            )
+        if color is not None:
+            theme_color = color.get_truecolor(theme)
+            append(f"color: {theme_color.hex}")
+            append(f"text-decoration-color: {theme_color.hex}")
+        if bgcolor is not None:
+            theme_color = bgcolor.get_truecolor(theme, foreground=False)
+            append(f"background-color: {theme_color.hex}")
+        if self.bold:
+            append("font-weight: bold")
+        if self.italic:
+            append("font-style: italic")
+        if self.underline:
+            append("text-decoration: underline")
+        if self.strike:
+            append("text-decoration: line-through")
+        if self.overline:
+            append("text-decoration: overline")
+        return "; ".join(css)
+
+    @classmethod
+    def combine(cls, styles: Iterable["Style"]) -> "Style":
+        """Combine styles and get result.
+
+        Args:
+            styles (Iterable[Style]): Styles to combine.
+
+        Returns:
+            Style: A new style instance.
+        """
+        iter_styles = iter(styles)
+        return sum(iter_styles, next(iter_styles))
+
+    @classmethod
+    def chain(cls, *styles: "Style") -> "Style":
+        """Combine styles from positional argument in to a single style.
+
+        Args:
+            *styles (Iterable[Style]): Styles to combine.
+
+        Returns:
+            Style: A new style instance.
+        """
+        iter_styles = iter(styles)
+        return sum(iter_styles, next(iter_styles))
+
+    def copy(self) -> "Style":
+        """Get a copy of this style.
+
+        Returns:
+            Style: A new Style instance with identical attributes.
+        """
+        if self._null:
+            return NULL_STYLE
+        style: Style = self.__new__(Style)
+        style._ansi = self._ansi
+        style._style_definition = self._style_definition
+        style._color = self._color
+        style._bgcolor = self._bgcolor
+        style._attributes = self._attributes
+        style._set_attributes = self._set_attributes
+        style._link = self._link
+        style._link_id = f"{randint(0, 999999)}" if self._link else ""
+        style._hash = self._hash
+        style._null = False
+        style._meta = self._meta
+        return style
+
+    def update_link(self, link: Optional[str] = None) -> "Style":
+        """Get a copy with a different value for link.
+
+        Args:
+            link (str, optional): New value for link. Defaults to None.
+
+        Returns:
+            Style: A new Style instance.
+        """
+        style: Style = self.__new__(Style)
+        style._ansi = self._ansi
+        style._style_definition = self._style_definition
+        style._color = self._color
+        style._bgcolor = self._bgcolor
+        style._attributes = self._attributes
+        style._set_attributes = self._set_attributes
+        style._link = link
+        style._link_id = f"{randint(0, 999999)}" if link else ""
+        style._hash = None
+        style._null = False
+        style._meta = self._meta
+        return style
+
+    def render(
+        self,
+        text: str = "",
+        *,
+        color_system: Optional[ColorSystem] = ColorSystem.TRUECOLOR,
+        legacy_windows: bool = False,
+    ) -> str:
+        """Render the ANSI codes for the style.
+
+        Args:
+            text (str, optional): A string to style. Defaults to "".
+            color_system (Optional[ColorSystem], optional): Color system to render to. Defaults to ColorSystem.TRUECOLOR.
+
+        Returns:
+            str: A string containing ANSI style codes.
+        """
+        if not text or color_system is None:
+            return text
+        attrs = self._ansi or self._make_ansi_codes(color_system)
+        rendered = f"\x1b[{attrs}m{text}\x1b[0m" if attrs else text
+        if self._link and not legacy_windows:
+            rendered = (
+                f"\x1b]8;id={self._link_id};{self._link}\x1b\\{rendered}\x1b]8;;\x1b\\"
+            )
+        return rendered
+
+    def test(self, text: Optional[str] = None) -> None:
+        """Write text with style directly to terminal.
+
+        This method is for testing purposes only.
+
+        Args:
+            text (Optional[str], optional): Text to style or None for style name.
+
+        """
+        text = text or str(self)
+        sys.stdout.write(f"{self.render(text)}\n")
+
+    @lru_cache(maxsize=1024)
+    def _add(self, style: Optional["Style"]) -> "Style":
+        if style is None or style._null:
+            return self
+        if self._null:
+            return style
+        new_style: Style = self.__new__(Style)
+        new_style._ansi = None
+        new_style._style_definition = None
+        new_style._color = style._color or self._color
+        new_style._bgcolor = style._bgcolor or self._bgcolor
+        new_style._attributes = (self._attributes & ~style._set_attributes) | (
+            style._attributes & style._set_attributes
+        )
+        new_style._set_attributes = self._set_attributes | style._set_attributes
+        new_style._link = style._link or self._link
+        new_style._link_id = style._link_id or self._link_id
+        new_style._null = style._null
+        if self._meta and style._meta:
+            new_style._meta = dumps({**self.meta, **style.meta})
+        else:
+            new_style._meta = self._meta or style._meta
+        new_style._hash = None
+        return new_style
+
+    def __add__(self, style: Optional["Style"]) -> "Style":
+        combined_style = self._add(style)
+        return combined_style.copy() if combined_style.link else combined_style
+
+
+NULL_STYLE = Style()
+
+
+class StyleStack:
+    """A stack of styles."""
+
+    __slots__ = ["_stack"]
+
+    def __init__(self, default_style: "Style") -> None:
+        self._stack: List[Style] = [default_style]
+
+    def __repr__(self) -> str:
+        return f"<stylestack {self._stack!r}>"
+
+    @property
+    def current(self) -> Style:
+        """Get the Style at the top of the stack."""
+        return self._stack[-1]
+
+    def push(self, style: Style) -> None:
+        """Push a new style on to the stack.
+
+        Args:
+            style (Style): New style to combine with current style.
+        """
+        self._stack.append(self._stack[-1] + style)
+
+    def pop(self) -> Style:
+        """Pop last style and discard.
+
+        Returns:
+            Style: New current style (also available as stack.current)
+        """
+        self._stack.pop()
+        return self._stack[-1]
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/styled.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/styled.py
new file mode 100644
index 0000000..91cd0db
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/styled.py
@@ -0,0 +1,42 @@
+from typing import TYPE_CHECKING
+
+from .measure import Measurement
+from .segment import Segment
+from .style import StyleType
+
+if TYPE_CHECKING:
+    from .console import Console, ConsoleOptions, RenderResult, RenderableType
+
+
+class Styled:
+    """Apply a style to a renderable.
+
+    Args:
+        renderable (RenderableType): Any renderable.
+        style (StyleType): A style to apply across the entire renderable.
+    """
+
+    def __init__(self, renderable: "RenderableType", style: "StyleType") -> None:
+        self.renderable = renderable
+        self.style = style
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+        style = console.get_style(self.style)
+        rendered_segments = console.render(self.renderable, options)
+        segments = Segment.apply_style(rendered_segments, style)
+        return segments
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        return Measurement.get(console, options, self.renderable)
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich import print
+    from pip._vendor.rich.panel import Panel
+
+    panel = Styled(Panel("hello"), "on blue")
+    print(panel)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/syntax.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/syntax.py
new file mode 100644
index 0000000..dace718
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/syntax.py
@@ -0,0 +1,934 @@
+import os.path
+import platform
+import re
+import sys
+import textwrap
+from abc import ABC, abstractmethod
+from typing import (
+    Any,
+    Dict,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Set,
+    Tuple,
+    Type,
+    Union,
+)
+
+from pip._vendor.pygments.lexer import Lexer
+from pip._vendor.pygments.lexers import get_lexer_by_name, guess_lexer_for_filename
+from pip._vendor.pygments.style import Style as PygmentsStyle
+from pip._vendor.pygments.styles import get_style_by_name
+from pip._vendor.pygments.token import (
+    Comment,
+    Error,
+    Generic,
+    Keyword,
+    Name,
+    Number,
+    Operator,
+    String,
+    Token,
+    Whitespace,
+)
+from pip._vendor.pygments.util import ClassNotFound
+
+from pip._vendor.rich.containers import Lines
+from pip._vendor.rich.padding import Padding, PaddingDimensions
+
+from ._loop import loop_first
+from .color import Color, blend_rgb
+from .console import Console, ConsoleOptions, JustifyMethod, RenderResult
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment, Segments
+from .style import Style, StyleType
+from .text import Text
+
+TokenType = Tuple[str, ...]
+
+WINDOWS = platform.system() == "Windows"
+DEFAULT_THEME = "monokai"
+
+# The following styles are based on https://github.com/pygments/pygments/blob/master/pygments/formatters/terminal.py
+# A few modifications were made
+
+ANSI_LIGHT: Dict[TokenType, Style] = {
+    Token: Style(),
+    Whitespace: Style(color="white"),
+    Comment: Style(dim=True),
+    Comment.Preproc: Style(color="cyan"),
+    Keyword: Style(color="blue"),
+    Keyword.Type: Style(color="cyan"),
+    Operator.Word: Style(color="magenta"),
+    Name.Builtin: Style(color="cyan"),
+    Name.Function: Style(color="green"),
+    Name.Namespace: Style(color="cyan", underline=True),
+    Name.Class: Style(color="green", underline=True),
+    Name.Exception: Style(color="cyan"),
+    Name.Decorator: Style(color="magenta", bold=True),
+    Name.Variable: Style(color="red"),
+    Name.Constant: Style(color="red"),
+    Name.Attribute: Style(color="cyan"),
+    Name.Tag: Style(color="bright_blue"),
+    String: Style(color="yellow"),
+    Number: Style(color="blue"),
+    Generic.Deleted: Style(color="bright_red"),
+    Generic.Inserted: Style(color="green"),
+    Generic.Heading: Style(bold=True),
+    Generic.Subheading: Style(color="magenta", bold=True),
+    Generic.Prompt: Style(bold=True),
+    Generic.Error: Style(color="bright_red"),
+    Error: Style(color="red", underline=True),
+}
+
+ANSI_DARK: Dict[TokenType, Style] = {
+    Token: Style(),
+    Whitespace: Style(color="bright_black"),
+    Comment: Style(dim=True),
+    Comment.Preproc: Style(color="bright_cyan"),
+    Keyword: Style(color="bright_blue"),
+    Keyword.Type: Style(color="bright_cyan"),
+    Operator.Word: Style(color="bright_magenta"),
+    Name.Builtin: Style(color="bright_cyan"),
+    Name.Function: Style(color="bright_green"),
+    Name.Namespace: Style(color="bright_cyan", underline=True),
+    Name.Class: Style(color="bright_green", underline=True),
+    Name.Exception: Style(color="bright_cyan"),
+    Name.Decorator: Style(color="bright_magenta", bold=True),
+    Name.Variable: Style(color="bright_red"),
+    Name.Constant: Style(color="bright_red"),
+    Name.Attribute: Style(color="bright_cyan"),
+    Name.Tag: Style(color="bright_blue"),
+    String: Style(color="yellow"),
+    Number: Style(color="bright_blue"),
+    Generic.Deleted: Style(color="bright_red"),
+    Generic.Inserted: Style(color="bright_green"),
+    Generic.Heading: Style(bold=True),
+    Generic.Subheading: Style(color="bright_magenta", bold=True),
+    Generic.Prompt: Style(bold=True),
+    Generic.Error: Style(color="bright_red"),
+    Error: Style(color="red", underline=True),
+}
+
+RICH_SYNTAX_THEMES = {"ansi_light": ANSI_LIGHT, "ansi_dark": ANSI_DARK}
+NUMBERS_COLUMN_DEFAULT_PADDING = 2
+
+
+class SyntaxTheme(ABC):
+    """Base class for a syntax theme."""
+
+    @abstractmethod
+    def get_style_for_token(self, token_type: TokenType) -> Style:
+        """Get a style for a given Pygments token."""
+        raise NotImplementedError  # pragma: no cover
+
+    @abstractmethod
+    def get_background_style(self) -> Style:
+        """Get the background color."""
+        raise NotImplementedError  # pragma: no cover
+
+
+class PygmentsSyntaxTheme(SyntaxTheme):
+    """Syntax theme that delegates to Pygments theme."""
+
+    def __init__(self, theme: Union[str, Type[PygmentsStyle]]) -> None:
+        self._style_cache: Dict[TokenType, Style] = {}
+        if isinstance(theme, str):
+            try:
+                self._pygments_style_class = get_style_by_name(theme)
+            except ClassNotFound:
+                self._pygments_style_class = get_style_by_name("default")
+        else:
+            self._pygments_style_class = theme
+
+        self._background_color = self._pygments_style_class.background_color
+        self._background_style = Style(bgcolor=self._background_color)
+
+    def get_style_for_token(self, token_type: TokenType) -> Style:
+        """Get a style from a Pygments class."""
+        try:
+            return self._style_cache[token_type]
+        except KeyError:
+            try:
+                pygments_style = self._pygments_style_class.style_for_token(token_type)
+            except KeyError:
+                style = Style.null()
+            else:
+                color = pygments_style["color"]
+                bgcolor = pygments_style["bgcolor"]
+                style = Style(
+                    color="#" + color if color else "#000000",
+                    bgcolor="#" + bgcolor if bgcolor else self._background_color,
+                    bold=pygments_style["bold"],
+                    italic=pygments_style["italic"],
+                    underline=pygments_style["underline"],
+                )
+            self._style_cache[token_type] = style
+        return style
+
+    def get_background_style(self) -> Style:
+        return self._background_style
+
+
+class ANSISyntaxTheme(SyntaxTheme):
+    """Syntax theme to use standard colors."""
+
+    def __init__(self, style_map: Dict[TokenType, Style]) -> None:
+        self.style_map = style_map
+        self._missing_style = Style.null()
+        self._background_style = Style.null()
+        self._style_cache: Dict[TokenType, Style] = {}
+
+    def get_style_for_token(self, token_type: TokenType) -> Style:
+        """Look up style in the style map."""
+        try:
+            return self._style_cache[token_type]
+        except KeyError:
+            # Styles form a hierarchy
+            # We need to go from most to least specific
+            # e.g. ("foo", "bar", "baz") to ("foo", "bar")  to ("foo",)
+            get_style = self.style_map.get
+            token = tuple(token_type)
+            style = self._missing_style
+            while token:
+                _style = get_style(token)
+                if _style is not None:
+                    style = _style
+                    break
+                token = token[:-1]
+            self._style_cache[token_type] = style
+            return style
+
+    def get_background_style(self) -> Style:
+        return self._background_style
+
+
+SyntaxPosition = Tuple[int, int]
+
+
+class _SyntaxHighlightRange(NamedTuple):
+    """
+    A range to highlight in a Syntax object.
+    `start` and `end` are 2-integers tuples, where the first integer is the line number
+    (starting from 1) and the second integer is the column index (starting from 0).
+    """
+
+    style: StyleType
+    start: SyntaxPosition
+    end: SyntaxPosition
+
+
+class Syntax(JupyterMixin):
+    """Construct a Syntax object to render syntax highlighted code.
+
+    Args:
+        code (str): Code to highlight.
+        lexer (Lexer | str): Lexer to use (see https://pygments.org/docs/lexers/)
+        theme (str, optional): Color theme, aka Pygments style (see https://pygments.org/docs/styles/#getting-a-list-of-available-styles). Defaults to "monokai".
+        dedent (bool, optional): Enable stripping of initial whitespace. Defaults to False.
+        line_numbers (bool, optional): Enable rendering of line numbers. Defaults to False.
+        start_line (int, optional): Starting number for line numbers. Defaults to 1.
+        line_range (Tuple[int | None, int | None], optional): If given should be a tuple of the start and end line to render.
+            A value of None in the tuple indicates the range is open in that direction.
+        highlight_lines (Set[int]): A set of line numbers to highlight.
+        code_width: Width of code to render (not including line numbers), or ``None`` to use all available width.
+        tab_size (int, optional): Size of tabs. Defaults to 4.
+        word_wrap (bool, optional): Enable word wrapping.
+        background_color (str, optional): Optional background color, or None to use theme color. Defaults to None.
+        indent_guides (bool, optional): Show indent guides. Defaults to False.
+        padding (PaddingDimensions): Padding to apply around the syntax. Defaults to 0 (no padding).
+    """
+
+    _pygments_style_class: Type[PygmentsStyle]
+    _theme: SyntaxTheme
+
+    @classmethod
+    def get_theme(cls, name: Union[str, SyntaxTheme]) -> SyntaxTheme:
+        """Get a syntax theme instance."""
+        if isinstance(name, SyntaxTheme):
+            return name
+        theme: SyntaxTheme
+        if name in RICH_SYNTAX_THEMES:
+            theme = ANSISyntaxTheme(RICH_SYNTAX_THEMES[name])
+        else:
+            theme = PygmentsSyntaxTheme(name)
+        return theme
+
+    def __init__(
+        self,
+        code: str,
+        lexer: Union[Lexer, str],
+        *,
+        theme: Union[str, SyntaxTheme] = DEFAULT_THEME,
+        dedent: bool = False,
+        line_numbers: bool = False,
+        start_line: int = 1,
+        line_range: Optional[Tuple[Optional[int], Optional[int]]] = None,
+        highlight_lines: Optional[Set[int]] = None,
+        code_width: Optional[int] = None,
+        tab_size: int = 4,
+        word_wrap: bool = False,
+        background_color: Optional[str] = None,
+        indent_guides: bool = False,
+        padding: PaddingDimensions = 0,
+    ) -> None:
+        self.code = code
+        self._lexer = lexer
+        self.dedent = dedent
+        self.line_numbers = line_numbers
+        self.start_line = start_line
+        self.line_range = line_range
+        self.highlight_lines = highlight_lines or set()
+        self.code_width = code_width
+        self.tab_size = tab_size
+        self.word_wrap = word_wrap
+        self.background_color = background_color
+        self.background_style = (
+            Style(bgcolor=background_color) if background_color else Style()
+        )
+        self.indent_guides = indent_guides
+        self.padding = padding
+
+        self._theme = self.get_theme(theme)
+        self._stylized_ranges: List[_SyntaxHighlightRange] = []
+
+    @classmethod
+    def from_path(
+        cls,
+        path: str,
+        encoding: str = "utf-8",
+        lexer: Optional[Union[Lexer, str]] = None,
+        theme: Union[str, SyntaxTheme] = DEFAULT_THEME,
+        dedent: bool = False,
+        line_numbers: bool = False,
+        line_range: Optional[Tuple[int, int]] = None,
+        start_line: int = 1,
+        highlight_lines: Optional[Set[int]] = None,
+        code_width: Optional[int] = None,
+        tab_size: int = 4,
+        word_wrap: bool = False,
+        background_color: Optional[str] = None,
+        indent_guides: bool = False,
+        padding: PaddingDimensions = 0,
+    ) -> "Syntax":
+        """Construct a Syntax object from a file.
+
+        Args:
+            path (str): Path to file to highlight.
+            encoding (str): Encoding of file.
+            lexer (str | Lexer, optional): Lexer to use. If None, lexer will be auto-detected from path/file content.
+            theme (str, optional): Color theme, aka Pygments style (see https://pygments.org/docs/styles/#getting-a-list-of-available-styles). Defaults to "emacs".
+            dedent (bool, optional): Enable stripping of initial whitespace. Defaults to True.
+            line_numbers (bool, optional): Enable rendering of line numbers. Defaults to False.
+            start_line (int, optional): Starting number for line numbers. Defaults to 1.
+            line_range (Tuple[int, int], optional): If given should be a tuple of the start and end line to render.
+            highlight_lines (Set[int]): A set of line numbers to highlight.
+            code_width: Width of code to render (not including line numbers), or ``None`` to use all available width.
+            tab_size (int, optional): Size of tabs. Defaults to 4.
+            word_wrap (bool, optional): Enable word wrapping of code.
+            background_color (str, optional): Optional background color, or None to use theme color. Defaults to None.
+            indent_guides (bool, optional): Show indent guides. Defaults to False.
+            padding (PaddingDimensions): Padding to apply around the syntax. Defaults to 0 (no padding).
+
+        Returns:
+            [Syntax]: A Syntax object that may be printed to the console
+        """
+        with open(path, "rt", encoding=encoding) as code_file:
+            code = code_file.read()
+
+        if not lexer:
+            lexer = cls.guess_lexer(path, code=code)
+
+        return cls(
+            code,
+            lexer,
+            theme=theme,
+            dedent=dedent,
+            line_numbers=line_numbers,
+            line_range=line_range,
+            start_line=start_line,
+            highlight_lines=highlight_lines,
+            code_width=code_width,
+            tab_size=tab_size,
+            word_wrap=word_wrap,
+            background_color=background_color,
+            indent_guides=indent_guides,
+            padding=padding,
+        )
+
+    @classmethod
+    def guess_lexer(cls, path: str, code: Optional[str] = None) -> str:
+        """Guess the alias of the Pygments lexer to use based on a path and an optional string of code.
+        If code is supplied, it will use a combination of the code and the filename to determine the
+        best lexer to use. For example, if the file is ``index.html`` and the file contains Django
+        templating syntax, then "html+django" will be returned. If the file is ``index.html``, and no
+        templating language is used, the "html" lexer will be used. If no string of code
+        is supplied, the lexer will be chosen based on the file extension..
+
+        Args:
+             path (AnyStr): The path to the file containing the code you wish to know the lexer for.
+             code (str, optional): Optional string of code that will be used as a fallback if no lexer
+                is found for the supplied path.
+
+        Returns:
+            str: The name of the Pygments lexer that best matches the supplied path/code.
+        """
+        lexer: Optional[Lexer] = None
+        lexer_name = "default"
+        if code:
+            try:
+                lexer = guess_lexer_for_filename(path, code)
+            except ClassNotFound:
+                pass
+
+        if not lexer:
+            try:
+                _, ext = os.path.splitext(path)
+                if ext:
+                    extension = ext.lstrip(".").lower()
+                    lexer = get_lexer_by_name(extension)
+            except ClassNotFound:
+                pass
+
+        if lexer:
+            if lexer.aliases:
+                lexer_name = lexer.aliases[0]
+            else:
+                lexer_name = lexer.name
+
+        return lexer_name
+
+    def _get_base_style(self) -> Style:
+        """Get the base style."""
+        default_style = self._theme.get_background_style() + self.background_style
+        return default_style
+
+    def _get_token_color(self, token_type: TokenType) -> Optional[Color]:
+        """Get a color (if any) for the given token.
+
+        Args:
+            token_type (TokenType): A token type tuple from Pygments.
+
+        Returns:
+            Optional[Color]: Color from theme, or None for no color.
+        """
+        style = self._theme.get_style_for_token(token_type)
+        return style.color
+
+    @property
+    def lexer(self) -> Optional[Lexer]:
+        """The lexer for this syntax, or None if no lexer was found.
+
+        Tries to find the lexer by name if a string was passed to the constructor.
+        """
+
+        if isinstance(self._lexer, Lexer):
+            return self._lexer
+        try:
+            return get_lexer_by_name(
+                self._lexer,
+                stripnl=False,
+                ensurenl=True,
+                tabsize=self.tab_size,
+            )
+        except ClassNotFound:
+            return None
+
+    def highlight(
+        self,
+        code: str,
+        line_range: Optional[Tuple[Optional[int], Optional[int]]] = None,
+    ) -> Text:
+        """Highlight code and return a Text instance.
+
+        Args:
+            code (str): Code to highlight.
+            line_range(Tuple[int, int], optional): Optional line range to highlight.
+
+        Returns:
+            Text: A text instance containing highlighted syntax.
+        """
+
+        base_style = self._get_base_style()
+        justify: JustifyMethod = (
+            "default" if base_style.transparent_background else "left"
+        )
+
+        text = Text(
+            justify=justify,
+            style=base_style,
+            tab_size=self.tab_size,
+            no_wrap=not self.word_wrap,
+        )
+        _get_theme_style = self._theme.get_style_for_token
+
+        lexer = self.lexer
+
+        if lexer is None:
+            text.append(code)
+        else:
+            if line_range:
+                # More complicated path to only stylize a portion of the code
+                # This speeds up further operations as there are less spans to process
+                line_start, line_end = line_range
+
+                def line_tokenize() -> Iterable[Tuple[Any, str]]:
+                    """Split tokens to one per line."""
+                    assert lexer  # required to make MyPy happy - we know lexer is not None at this point
+
+                    for token_type, token in lexer.get_tokens(code):
+                        while token:
+                            line_token, new_line, token = token.partition("\n")
+                            yield token_type, line_token + new_line
+
+                def tokens_to_spans() -> Iterable[Tuple[str, Optional[Style]]]:
+                    """Convert tokens to spans."""
+                    tokens = iter(line_tokenize())
+                    line_no = 0
+                    _line_start = line_start - 1 if line_start else 0
+
+                    # Skip over tokens until line start
+                    while line_no < _line_start:
+                        _token_type, token = next(tokens)
+                        yield (token, None)
+                        if token.endswith("\n"):
+                            line_no += 1
+                    # Generate spans until line end
+                    for token_type, token in tokens:
+                        yield (token, _get_theme_style(token_type))
+                        if token.endswith("\n"):
+                            line_no += 1
+                            if line_end and line_no >= line_end:
+                                break
+
+                text.append_tokens(tokens_to_spans())
+
+            else:
+                text.append_tokens(
+                    (token, _get_theme_style(token_type))
+                    for token_type, token in lexer.get_tokens(code)
+                )
+            if self.background_color is not None:
+                text.stylize(f"on {self.background_color}")
+
+        if self._stylized_ranges:
+            self._apply_stylized_ranges(text)
+
+        return text
+
+    def stylize_range(
+        self, style: StyleType, start: SyntaxPosition, end: SyntaxPosition
+    ) -> None:
+        """
+        Adds a custom style on a part of the code, that will be applied to the syntax display when it's rendered.
+        Line numbers are 1-based, while column indexes are 0-based.
+
+        Args:
+            style (StyleType): The style to apply.
+            start (Tuple[int, int]): The start of the range, in the form `[line number, column index]`.
+            end (Tuple[int, int]): The end of the range, in the form `[line number, column index]`.
+        """
+        self._stylized_ranges.append(_SyntaxHighlightRange(style, start, end))
+
+    def _get_line_numbers_color(self, blend: float = 0.3) -> Color:
+        background_style = self._theme.get_background_style() + self.background_style
+        background_color = background_style.bgcolor
+        if background_color is None or background_color.is_system_defined:
+            return Color.default()
+        foreground_color = self._get_token_color(Token.Text)
+        if foreground_color is None or foreground_color.is_system_defined:
+            return foreground_color or Color.default()
+        new_color = blend_rgb(
+            background_color.get_truecolor(),
+            foreground_color.get_truecolor(),
+            cross_fade=blend,
+        )
+        return Color.from_triplet(new_color)
+
+    @property
+    def _numbers_column_width(self) -> int:
+        """Get the number of characters used to render the numbers column."""
+        column_width = 0
+        if self.line_numbers:
+            column_width = (
+                len(str(self.start_line + self.code.count("\n")))
+                + NUMBERS_COLUMN_DEFAULT_PADDING
+            )
+        return column_width
+
+    def _get_number_styles(self, console: Console) -> Tuple[Style, Style, Style]:
+        """Get background, number, and highlight styles for line numbers."""
+        background_style = self._get_base_style()
+        if background_style.transparent_background:
+            return Style.null(), Style(dim=True), Style.null()
+        if console.color_system in ("256", "truecolor"):
+            number_style = Style.chain(
+                background_style,
+                self._theme.get_style_for_token(Token.Text),
+                Style(color=self._get_line_numbers_color()),
+                self.background_style,
+            )
+            highlight_number_style = Style.chain(
+                background_style,
+                self._theme.get_style_for_token(Token.Text),
+                Style(bold=True, color=self._get_line_numbers_color(0.9)),
+                self.background_style,
+            )
+        else:
+            number_style = background_style + Style(dim=True)
+            highlight_number_style = background_style + Style(dim=False)
+        return background_style, number_style, highlight_number_style
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        _, right, _, left = Padding.unpack(self.padding)
+        if self.code_width is not None:
+            width = self.code_width + self._numbers_column_width + right + left
+            return Measurement(self._numbers_column_width, width)
+        return Measurement(self._numbers_column_width, options.max_width)
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        segments = Segments(self._get_syntax(console, options))
+        if self.padding:
+            yield Padding(
+                segments, style=self._theme.get_background_style(), pad=self.padding
+            )
+        else:
+            yield segments
+
+    def _get_syntax(
+        self,
+        console: Console,
+        options: ConsoleOptions,
+    ) -> Iterable[Segment]:
+        """
+        Get the Segments for the Syntax object, excluding any vertical/horizontal padding
+        """
+        transparent_background = self._get_base_style().transparent_background
+        code_width = (
+            (
+                (options.max_width - self._numbers_column_width - 1)
+                if self.line_numbers
+                else options.max_width
+            )
+            if self.code_width is None
+            else self.code_width
+        )
+
+        ends_on_nl, processed_code = self._process_code(self.code)
+        text = self.highlight(processed_code, self.line_range)
+
+        if not self.line_numbers and not self.word_wrap and not self.line_range:
+            if not ends_on_nl:
+                text.remove_suffix("\n")
+            # Simple case of just rendering text
+            style = (
+                self._get_base_style()
+                + self._theme.get_style_for_token(Comment)
+                + Style(dim=True)
+                + self.background_style
+            )
+            if self.indent_guides and not options.ascii_only:
+                text = text.with_indent_guides(self.tab_size, style=style)
+                text.overflow = "crop"
+            if style.transparent_background:
+                yield from console.render(
+                    text, options=options.update(width=code_width)
+                )
+            else:
+                syntax_lines = console.render_lines(
+                    text,
+                    options.update(width=code_width, height=None, justify="left"),
+                    style=self.background_style,
+                    pad=True,
+                    new_lines=True,
+                )
+                for syntax_line in syntax_lines:
+                    yield from syntax_line
+            return
+
+        start_line, end_line = self.line_range or (None, None)
+        line_offset = 0
+        if start_line:
+            line_offset = max(0, start_line - 1)
+        lines: Union[List[Text], Lines] = text.split("\n", allow_blank=ends_on_nl)
+        if self.line_range:
+            lines = lines[line_offset:end_line]
+
+        if self.indent_guides and not options.ascii_only:
+            style = (
+                self._get_base_style()
+                + self._theme.get_style_for_token(Comment)
+                + Style(dim=True)
+                + self.background_style
+            )
+            lines = (
+                Text("\n")
+                .join(lines)
+                .with_indent_guides(self.tab_size, style=style)
+                .split("\n", allow_blank=True)
+            )
+
+        numbers_column_width = self._numbers_column_width
+        render_options = options.update(width=code_width)
+
+        highlight_line = self.highlight_lines.__contains__
+        _Segment = Segment
+        new_line = _Segment("\n")
+
+        line_pointer = "> " if options.legacy_windows else "❱ "
+
+        (
+            background_style,
+            number_style,
+            highlight_number_style,
+        ) = self._get_number_styles(console)
+
+        for line_no, line in enumerate(lines, self.start_line + line_offset):
+            if self.word_wrap:
+                wrapped_lines = console.render_lines(
+                    line,
+                    render_options.update(height=None, justify="left"),
+                    style=background_style,
+                    pad=not transparent_background,
+                )
+            else:
+                segments = list(line.render(console, end=""))
+                if options.no_wrap:
+                    wrapped_lines = [segments]
+                else:
+                    wrapped_lines = [
+                        _Segment.adjust_line_length(
+                            segments,
+                            render_options.max_width,
+                            style=background_style,
+                            pad=not transparent_background,
+                        )
+                    ]
+
+            if self.line_numbers:
+                wrapped_line_left_pad = _Segment(
+                    " " * numbers_column_width + " ", background_style
+                )
+                for first, wrapped_line in loop_first(wrapped_lines):
+                    if first:
+                        line_column = str(line_no).rjust(numbers_column_width - 2) + " "
+                        if highlight_line(line_no):
+                            yield _Segment(line_pointer, Style(color="red"))
+                            yield _Segment(line_column, highlight_number_style)
+                        else:
+                            yield _Segment("  ", highlight_number_style)
+                            yield _Segment(line_column, number_style)
+                    else:
+                        yield wrapped_line_left_pad
+                    yield from wrapped_line
+                    yield new_line
+            else:
+                for wrapped_line in wrapped_lines:
+                    yield from wrapped_line
+                    yield new_line
+
+    def _apply_stylized_ranges(self, text: Text) -> None:
+        """
+        Apply stylized ranges to a text instance,
+        using the given code to determine the right portion to apply the style to.
+
+        Args:
+            text (Text): Text instance to apply the style to.
+        """
+        code = text.plain
+        newlines_offsets = [
+            # Let's add outer boundaries at each side of the list:
+            0,
+            # N.B. using "\n" here is much faster than using metacharacters such as "^" or "\Z":
+            *[
+                match.start() + 1
+                for match in re.finditer("\n", code, flags=re.MULTILINE)
+            ],
+            len(code) + 1,
+        ]
+
+        for stylized_range in self._stylized_ranges:
+            start = _get_code_index_for_syntax_position(
+                newlines_offsets, stylized_range.start
+            )
+            end = _get_code_index_for_syntax_position(
+                newlines_offsets, stylized_range.end
+            )
+            if start is not None and end is not None:
+                text.stylize(stylized_range.style, start, end)
+
+    def _process_code(self, code: str) -> Tuple[bool, str]:
+        """
+        Applies various processing to a raw code string
+        (normalises it so it always ends with a line return, dedents it if necessary, etc.)
+
+        Args:
+            code (str): The raw code string to process
+
+        Returns:
+            Tuple[bool, str]: the boolean indicates whether the raw code ends with a line return,
+                while the string is the processed code.
+        """
+        ends_on_nl = code.endswith("\n")
+        processed_code = code if ends_on_nl else code + "\n"
+        processed_code = (
+            textwrap.dedent(processed_code) if self.dedent else processed_code
+        )
+        processed_code = processed_code.expandtabs(self.tab_size)
+        return ends_on_nl, processed_code
+
+
+def _get_code_index_for_syntax_position(
+    newlines_offsets: Sequence[int], position: SyntaxPosition
+) -> Optional[int]:
+    """
+    Returns the index of the code string for the given positions.
+
+    Args:
+        newlines_offsets (Sequence[int]): The offset of each newline character found in the code snippet.
+        position (SyntaxPosition): The position to search for.
+
+    Returns:
+        Optional[int]: The index of the code string for this position, or `None`
+            if the given position's line number is out of range (if it's the column that is out of range
+            we silently clamp its value so that it reaches the end of the line)
+    """
+    lines_count = len(newlines_offsets)
+
+    line_number, column_index = position
+    if line_number > lines_count or len(newlines_offsets) < (line_number + 1):
+        return None  # `line_number` is out of range
+    line_index = line_number - 1
+    line_length = newlines_offsets[line_index + 1] - newlines_offsets[line_index] - 1
+    # If `column_index` is out of range: let's silently clamp it:
+    column_index = min(line_length, column_index)
+    return newlines_offsets[line_index] + column_index
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    import argparse
+    import sys
+
+    parser = argparse.ArgumentParser(
+        description="Render syntax to the console with Rich"
+    )
+    parser.add_argument(
+        "path",
+        metavar="PATH",
+        help="path to file, or - for stdin",
+    )
+    parser.add_argument(
+        "-c",
+        "--force-color",
+        dest="force_color",
+        action="store_true",
+        default=None,
+        help="force color for non-terminals",
+    )
+    parser.add_argument(
+        "-i",
+        "--indent-guides",
+        dest="indent_guides",
+        action="store_true",
+        default=False,
+        help="display indent guides",
+    )
+    parser.add_argument(
+        "-l",
+        "--line-numbers",
+        dest="line_numbers",
+        action="store_true",
+        help="render line numbers",
+    )
+    parser.add_argument(
+        "-w",
+        "--width",
+        type=int,
+        dest="width",
+        default=None,
+        help="width of output (default will auto-detect)",
+    )
+    parser.add_argument(
+        "-r",
+        "--wrap",
+        dest="word_wrap",
+        action="store_true",
+        default=False,
+        help="word wrap long lines",
+    )
+    parser.add_argument(
+        "-s",
+        "--soft-wrap",
+        action="store_true",
+        dest="soft_wrap",
+        default=False,
+        help="enable soft wrapping mode",
+    )
+    parser.add_argument(
+        "-t", "--theme", dest="theme", default="monokai", help="pygments theme"
+    )
+    parser.add_argument(
+        "-b",
+        "--background-color",
+        dest="background_color",
+        default=None,
+        help="Override background color",
+    )
+    parser.add_argument(
+        "-x",
+        "--lexer",
+        default=None,
+        dest="lexer_name",
+        help="Lexer name",
+    )
+    parser.add_argument(
+        "-p", "--padding", type=int, default=0, dest="padding", help="Padding"
+    )
+    parser.add_argument(
+        "--highlight-line",
+        type=int,
+        default=None,
+        dest="highlight_line",
+        help="The line number (not index!) to highlight",
+    )
+    args = parser.parse_args()
+
+    from pip._vendor.rich.console import Console
+
+    console = Console(force_terminal=args.force_color, width=args.width)
+
+    if args.path == "-":
+        code = sys.stdin.read()
+        syntax = Syntax(
+            code=code,
+            lexer=args.lexer_name,
+            line_numbers=args.line_numbers,
+            word_wrap=args.word_wrap,
+            theme=args.theme,
+            background_color=args.background_color,
+            indent_guides=args.indent_guides,
+            padding=args.padding,
+            highlight_lines={args.highlight_line},
+        )
+    else:
+        syntax = Syntax.from_path(
+            args.path,
+            lexer=args.lexer_name,
+            line_numbers=args.line_numbers,
+            word_wrap=args.word_wrap,
+            theme=args.theme,
+            background_color=args.background_color,
+            indent_guides=args.indent_guides,
+            padding=args.padding,
+            highlight_lines={args.highlight_line},
+        )
+    console.print(syntax, soft_wrap=args.soft_wrap)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/table.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/table.py
new file mode 100644
index 0000000..8fc28ef
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/table.py
@@ -0,0 +1,996 @@
+from dataclasses import dataclass, field, replace
+from typing import (
+    TYPE_CHECKING,
+    Dict,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Sequence,
+    Tuple,
+    Union,
+)
+
+from . import box, errors
+from ._loop import loop_first_last, loop_last
+from ._pick import pick_bool
+from ._ratio import ratio_distribute, ratio_reduce
+from .align import VerticalAlignMethod
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .padding import Padding, PaddingDimensions
+from .protocol import is_renderable
+from .segment import Segment
+from .style import Style, StyleType
+from .text import Text, TextType
+
+if TYPE_CHECKING:
+    from .console import (
+        Console,
+        ConsoleOptions,
+        JustifyMethod,
+        OverflowMethod,
+        RenderableType,
+        RenderResult,
+    )
+
+
+@dataclass
+class Column:
+    """Defines a column within a ~Table.
+
+    Args:
+        title (Union[str, Text], optional): The title of the table rendered at the top. Defaults to None.
+        caption (Union[str, Text], optional): The table caption rendered below. Defaults to None.
+        width (int, optional): The width in characters of the table, or ``None`` to automatically fit. Defaults to None.
+        min_width (Optional[int], optional): The minimum width of the table, or ``None`` for no minimum. Defaults to None.
+        box (box.Box, optional): One of the constants in box.py used to draw the edges (see :ref:`appendix_box`), or ``None`` for no box lines. Defaults to box.HEAVY_HEAD.
+        safe_box (Optional[bool], optional): Disable box characters that don't display on windows legacy terminal with *raster* fonts. Defaults to True.
+        padding (PaddingDimensions, optional): Padding for cells (top, right, bottom, left). Defaults to (0, 1).
+        collapse_padding (bool, optional): Enable collapsing of padding around cells. Defaults to False.
+        pad_edge (bool, optional): Enable padding of edge cells. Defaults to True.
+        expand (bool, optional): Expand the table to fit the available space if ``True``, otherwise the table width will be auto-calculated. Defaults to False.
+        show_header (bool, optional): Show a header row. Defaults to True.
+        show_footer (bool, optional): Show a footer row. Defaults to False.
+        show_edge (bool, optional): Draw a box around the outside of the table. Defaults to True.
+        show_lines (bool, optional): Draw lines between every row. Defaults to False.
+        leading (bool, optional): Number of blank lines between rows (precludes ``show_lines``). Defaults to 0.
+        style (Union[str, Style], optional): Default style for the table. Defaults to "none".
+        row_styles (List[Union, str], optional): Optional list of row styles, if more than one style is given then the styles will alternate. Defaults to None.
+        header_style (Union[str, Style], optional): Style of the header. Defaults to "table.header".
+        footer_style (Union[str, Style], optional): Style of the footer. Defaults to "table.footer".
+        border_style (Union[str, Style], optional): Style of the border. Defaults to None.
+        title_style (Union[str, Style], optional): Style of the title. Defaults to None.
+        caption_style (Union[str, Style], optional): Style of the caption. Defaults to None.
+        title_justify (str, optional): Justify method for title. Defaults to "center".
+        caption_justify (str, optional): Justify method for caption. Defaults to "center".
+        highlight (bool, optional): Highlight cell contents (if str). Defaults to False.
+    """
+
+    header: "RenderableType" = ""
+    """RenderableType: Renderable for the header (typically a string)"""
+
+    footer: "RenderableType" = ""
+    """RenderableType: Renderable for the footer (typically a string)"""
+
+    header_style: StyleType = ""
+    """StyleType: The style of the header."""
+
+    footer_style: StyleType = ""
+    """StyleType: The style of the footer."""
+
+    style: StyleType = ""
+    """StyleType: The style of the column."""
+
+    justify: "JustifyMethod" = "left"
+    """str: How to justify text within the column ("left", "center", "right", or "full")"""
+
+    vertical: "VerticalAlignMethod" = "top"
+    """str: How to vertically align content ("top", "middle", or "bottom")"""
+
+    overflow: "OverflowMethod" = "ellipsis"
+    """str: Overflow method."""
+
+    width: Optional[int] = None
+    """Optional[int]: Width of the column, or ``None`` (default) to auto calculate width."""
+
+    min_width: Optional[int] = None
+    """Optional[int]: Minimum width of column, or ``None`` for no minimum. Defaults to None."""
+
+    max_width: Optional[int] = None
+    """Optional[int]: Maximum width of column, or ``None`` for no maximum. Defaults to None."""
+
+    ratio: Optional[int] = None
+    """Optional[int]: Ratio to use when calculating column width, or ``None`` (default) to adapt to column contents."""
+
+    no_wrap: bool = False
+    """bool: Prevent wrapping of text within the column. Defaults to ``False``."""
+
+    _index: int = 0
+    """Index of column."""
+
+    _cells: List["RenderableType"] = field(default_factory=list)
+
+    def copy(self) -> "Column":
+        """Return a copy of this Column."""
+        return replace(self, _cells=[])
+
+    @property
+    def cells(self) -> Iterable["RenderableType"]:
+        """Get all cells in the column, not including header."""
+        yield from self._cells
+
+    @property
+    def flexible(self) -> bool:
+        """Check if this column is flexible."""
+        return self.ratio is not None
+
+
+@dataclass
+class Row:
+    """Information regarding a row."""
+
+    style: Optional[StyleType] = None
+    """Style to apply to row."""
+
+    end_section: bool = False
+    """Indicated end of section, which will force a line beneath the row."""
+
+
+class _Cell(NamedTuple):
+    """A single cell in a table."""
+
+    style: StyleType
+    """Style to apply to cell."""
+    renderable: "RenderableType"
+    """Cell renderable."""
+    vertical: VerticalAlignMethod
+    """Cell vertical alignment."""
+
+
+class Table(JupyterMixin):
+    """A console renderable to draw a table.
+
+    Args:
+        *headers (Union[Column, str]): Column headers, either as a string, or :class:`~rich.table.Column` instance.
+        title (Union[str, Text], optional): The title of the table rendered at the top. Defaults to None.
+        caption (Union[str, Text], optional): The table caption rendered below. Defaults to None.
+        width (int, optional): The width in characters of the table, or ``None`` to automatically fit. Defaults to None.
+        min_width (Optional[int], optional): The minimum width of the table, or ``None`` for no minimum. Defaults to None.
+        box (box.Box, optional): One of the constants in box.py used to draw the edges (see :ref:`appendix_box`), or ``None`` for no box lines. Defaults to box.HEAVY_HEAD.
+        safe_box (Optional[bool], optional): Disable box characters that don't display on windows legacy terminal with *raster* fonts. Defaults to True.
+        padding (PaddingDimensions, optional): Padding for cells (top, right, bottom, left). Defaults to (0, 1).
+        collapse_padding (bool, optional): Enable collapsing of padding around cells. Defaults to False.
+        pad_edge (bool, optional): Enable padding of edge cells. Defaults to True.
+        expand (bool, optional): Expand the table to fit the available space if ``True``, otherwise the table width will be auto-calculated. Defaults to False.
+        show_header (bool, optional): Show a header row. Defaults to True.
+        show_footer (bool, optional): Show a footer row. Defaults to False.
+        show_edge (bool, optional): Draw a box around the outside of the table. Defaults to True.
+        show_lines (bool, optional): Draw lines between every row. Defaults to False.
+        leading (bool, optional): Number of blank lines between rows (precludes ``show_lines``). Defaults to 0.
+        style (Union[str, Style], optional): Default style for the table. Defaults to "none".
+        row_styles (List[Union, str], optional): Optional list of row styles, if more than one style is given then the styles will alternate. Defaults to None.
+        header_style (Union[str, Style], optional): Style of the header. Defaults to "table.header".
+        footer_style (Union[str, Style], optional): Style of the footer. Defaults to "table.footer".
+        border_style (Union[str, Style], optional): Style of the border. Defaults to None.
+        title_style (Union[str, Style], optional): Style of the title. Defaults to None.
+        caption_style (Union[str, Style], optional): Style of the caption. Defaults to None.
+        title_justify (str, optional): Justify method for title. Defaults to "center".
+        caption_justify (str, optional): Justify method for caption. Defaults to "center".
+        highlight (bool, optional): Highlight cell contents (if str). Defaults to False.
+    """
+
+    columns: List[Column]
+    rows: List[Row]
+
+    def __init__(
+        self,
+        *headers: Union[Column, str],
+        title: Optional[TextType] = None,
+        caption: Optional[TextType] = None,
+        width: Optional[int] = None,
+        min_width: Optional[int] = None,
+        box: Optional[box.Box] = box.HEAVY_HEAD,
+        safe_box: Optional[bool] = None,
+        padding: PaddingDimensions = (0, 1),
+        collapse_padding: bool = False,
+        pad_edge: bool = True,
+        expand: bool = False,
+        show_header: bool = True,
+        show_footer: bool = False,
+        show_edge: bool = True,
+        show_lines: bool = False,
+        leading: int = 0,
+        style: StyleType = "none",
+        row_styles: Optional[Iterable[StyleType]] = None,
+        header_style: Optional[StyleType] = "table.header",
+        footer_style: Optional[StyleType] = "table.footer",
+        border_style: Optional[StyleType] = None,
+        title_style: Optional[StyleType] = None,
+        caption_style: Optional[StyleType] = None,
+        title_justify: "JustifyMethod" = "center",
+        caption_justify: "JustifyMethod" = "center",
+        highlight: bool = False,
+    ) -> None:
+
+        self.columns: List[Column] = []
+        self.rows: List[Row] = []
+        self.title = title
+        self.caption = caption
+        self.width = width
+        self.min_width = min_width
+        self.box = box
+        self.safe_box = safe_box
+        self._padding = Padding.unpack(padding)
+        self.pad_edge = pad_edge
+        self._expand = expand
+        self.show_header = show_header
+        self.show_footer = show_footer
+        self.show_edge = show_edge
+        self.show_lines = show_lines
+        self.leading = leading
+        self.collapse_padding = collapse_padding
+        self.style = style
+        self.header_style = header_style or ""
+        self.footer_style = footer_style or ""
+        self.border_style = border_style
+        self.title_style = title_style
+        self.caption_style = caption_style
+        self.title_justify: "JustifyMethod" = title_justify
+        self.caption_justify: "JustifyMethod" = caption_justify
+        self.highlight = highlight
+        self.row_styles: Sequence[StyleType] = list(row_styles or [])
+        append_column = self.columns.append
+        for header in headers:
+            if isinstance(header, str):
+                self.add_column(header=header)
+            else:
+                header._index = len(self.columns)
+                append_column(header)
+
+    @classmethod
+    def grid(
+        cls,
+        *headers: Union[Column, str],
+        padding: PaddingDimensions = 0,
+        collapse_padding: bool = True,
+        pad_edge: bool = False,
+        expand: bool = False,
+    ) -> "Table":
+        """Get a table with no lines, headers, or footer.
+
+        Args:
+            *headers (Union[Column, str]): Column headers, either as a string, or :class:`~rich.table.Column` instance.
+            padding (PaddingDimensions, optional): Get padding around cells. Defaults to 0.
+            collapse_padding (bool, optional): Enable collapsing of padding around cells. Defaults to True.
+            pad_edge (bool, optional): Enable padding around edges of table. Defaults to False.
+            expand (bool, optional): Expand the table to fit the available space if ``True``, otherwise the table width will be auto-calculated. Defaults to False.
+
+        Returns:
+            Table: A table instance.
+        """
+        return cls(
+            *headers,
+            box=None,
+            padding=padding,
+            collapse_padding=collapse_padding,
+            show_header=False,
+            show_footer=False,
+            show_edge=False,
+            pad_edge=pad_edge,
+            expand=expand,
+        )
+
+    @property
+    def expand(self) -> bool:
+        """Setting a non-None self.width implies expand."""
+        return self._expand or self.width is not None
+
+    @expand.setter
+    def expand(self, expand: bool) -> None:
+        """Set expand."""
+        self._expand = expand
+
+    @property
+    def _extra_width(self) -> int:
+        """Get extra width to add to cell content."""
+        width = 0
+        if self.box and self.show_edge:
+            width += 2
+        if self.box:
+            width += len(self.columns) - 1
+        return width
+
+    @property
+    def row_count(self) -> int:
+        """Get the current number of rows."""
+        return len(self.rows)
+
+    def get_row_style(self, console: "Console", index: int) -> StyleType:
+        """Get the current row style."""
+        style = Style.null()
+        if self.row_styles:
+            style += console.get_style(self.row_styles[index % len(self.row_styles)])
+        row_style = self.rows[index].style
+        if row_style is not None:
+            style += console.get_style(row_style)
+        return style
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        max_width = options.max_width
+        if self.width is not None:
+            max_width = self.width
+        if max_width < 0:
+            return Measurement(0, 0)
+
+        extra_width = self._extra_width
+        max_width = sum(
+            self._calculate_column_widths(
+                console, options.update_width(max_width - extra_width)
+            )
+        )
+        _measure_column = self._measure_column
+
+        measurements = [
+            _measure_column(console, options.update_width(max_width), column)
+            for column in self.columns
+        ]
+        minimum_width = (
+            sum(measurement.minimum for measurement in measurements) + extra_width
+        )
+        maximum_width = (
+            sum(measurement.maximum for measurement in measurements) + extra_width
+            if (self.width is None)
+            else self.width
+        )
+        measurement = Measurement(minimum_width, maximum_width)
+        measurement = measurement.clamp(self.min_width)
+        return measurement
+
+    @property
+    def padding(self) -> Tuple[int, int, int, int]:
+        """Get cell padding."""
+        return self._padding
+
+    @padding.setter
+    def padding(self, padding: PaddingDimensions) -> "Table":
+        """Set cell padding."""
+        self._padding = Padding.unpack(padding)
+        return self
+
+    def add_column(
+        self,
+        header: "RenderableType" = "",
+        footer: "RenderableType" = "",
+        *,
+        header_style: Optional[StyleType] = None,
+        footer_style: Optional[StyleType] = None,
+        style: Optional[StyleType] = None,
+        justify: "JustifyMethod" = "left",
+        vertical: "VerticalAlignMethod" = "top",
+        overflow: "OverflowMethod" = "ellipsis",
+        width: Optional[int] = None,
+        min_width: Optional[int] = None,
+        max_width: Optional[int] = None,
+        ratio: Optional[int] = None,
+        no_wrap: bool = False,
+    ) -> None:
+        """Add a column to the table.
+
+        Args:
+            header (RenderableType, optional): Text or renderable for the header.
+                Defaults to "".
+            footer (RenderableType, optional): Text or renderable for the footer.
+                Defaults to "".
+            header_style (Union[str, Style], optional): Style for the header, or None for default. Defaults to None.
+            footer_style (Union[str, Style], optional): Style for the footer, or None for default. Defaults to None.
+            style (Union[str, Style], optional): Style for the column cells, or None for default. Defaults to None.
+            justify (JustifyMethod, optional): Alignment for cells. Defaults to "left".
+            vertical (VerticalAlignMethod, optional): Vertical alignment, one of "top", "middle", or "bottom". Defaults to "top".
+            overflow (OverflowMethod): Overflow method: "crop", "fold", "ellipsis". Defaults to "ellipsis".
+            width (int, optional): Desired width of column in characters, or None to fit to contents. Defaults to None.
+            min_width (Optional[int], optional): Minimum width of column, or ``None`` for no minimum. Defaults to None.
+            max_width (Optional[int], optional): Maximum width of column, or ``None`` for no maximum. Defaults to None.
+            ratio (int, optional): Flexible ratio for the column (requires ``Table.expand`` or ``Table.width``). Defaults to None.
+            no_wrap (bool, optional): Set to ``True`` to disable wrapping of this column.
+        """
+
+        column = Column(
+            _index=len(self.columns),
+            header=header,
+            footer=footer,
+            header_style=header_style or "",
+            footer_style=footer_style or "",
+            style=style or "",
+            justify=justify,
+            vertical=vertical,
+            overflow=overflow,
+            width=width,
+            min_width=min_width,
+            max_width=max_width,
+            ratio=ratio,
+            no_wrap=no_wrap,
+        )
+        self.columns.append(column)
+
+    def add_row(
+        self,
+        *renderables: Optional["RenderableType"],
+        style: Optional[StyleType] = None,
+        end_section: bool = False,
+    ) -> None:
+        """Add a row of renderables.
+
+        Args:
+            *renderables (None or renderable): Each cell in a row must be a renderable object (including str),
+                or ``None`` for a blank cell.
+            style (StyleType, optional): An optional style to apply to the entire row. Defaults to None.
+            end_section (bool, optional): End a section and draw a line. Defaults to False.
+
+        Raises:
+            errors.NotRenderableError: If you add something that can't be rendered.
+        """
+
+        def add_cell(column: Column, renderable: "RenderableType") -> None:
+            column._cells.append(renderable)
+
+        cell_renderables: List[Optional["RenderableType"]] = list(renderables)
+
+        columns = self.columns
+        if len(cell_renderables) < len(columns):
+            cell_renderables = [
+                *cell_renderables,
+                *[None] * (len(columns) - len(cell_renderables)),
+            ]
+        for index, renderable in enumerate(cell_renderables):
+            if index == len(columns):
+                column = Column(_index=index)
+                for _ in self.rows:
+                    add_cell(column, Text(""))
+                self.columns.append(column)
+            else:
+                column = columns[index]
+            if renderable is None:
+                add_cell(column, "")
+            elif is_renderable(renderable):
+                add_cell(column, renderable)
+            else:
+                raise errors.NotRenderableError(
+                    f"unable to render {type(renderable).__name__}; a string or other renderable object is required"
+                )
+        self.rows.append(Row(style=style, end_section=end_section))
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+
+        if not self.columns:
+            yield Segment("\n")
+            return
+
+        max_width = options.max_width
+        if self.width is not None:
+            max_width = self.width
+
+        extra_width = self._extra_width
+        widths = self._calculate_column_widths(
+            console, options.update_width(max_width - extra_width)
+        )
+        table_width = sum(widths) + extra_width
+
+        render_options = options.update(
+            width=table_width, highlight=self.highlight, height=None
+        )
+
+        def render_annotation(
+            text: TextType, style: StyleType, justify: "JustifyMethod" = "center"
+        ) -> "RenderResult":
+            render_text = (
+                console.render_str(text, style=style, highlight=False)
+                if isinstance(text, str)
+                else text
+            )
+            return console.render(
+                render_text, options=render_options.update(justify=justify)
+            )
+
+        if self.title:
+            yield from render_annotation(
+                self.title,
+                style=Style.pick_first(self.title_style, "table.title"),
+                justify=self.title_justify,
+            )
+        yield from self._render(console, render_options, widths)
+        if self.caption:
+            yield from render_annotation(
+                self.caption,
+                style=Style.pick_first(self.caption_style, "table.caption"),
+                justify=self.caption_justify,
+            )
+
+    def _calculate_column_widths(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> List[int]:
+        """Calculate the widths of each column, including padding, not including borders."""
+        max_width = options.max_width
+        columns = self.columns
+        width_ranges = [
+            self._measure_column(console, options, column) for column in columns
+        ]
+        widths = [_range.maximum or 1 for _range in width_ranges]
+        get_padding_width = self._get_padding_width
+        extra_width = self._extra_width
+        if self.expand:
+            ratios = [col.ratio or 0 for col in columns if col.flexible]
+            if any(ratios):
+                fixed_widths = [
+                    0 if column.flexible else _range.maximum
+                    for _range, column in zip(width_ranges, columns)
+                ]
+                flex_minimum = [
+                    (column.width or 1) + get_padding_width(column._index)
+                    for column in columns
+                    if column.flexible
+                ]
+                flexible_width = max_width - sum(fixed_widths)
+                flex_widths = ratio_distribute(flexible_width, ratios, flex_minimum)
+                iter_flex_widths = iter(flex_widths)
+                for index, column in enumerate(columns):
+                    if column.flexible:
+                        widths[index] = fixed_widths[index] + next(iter_flex_widths)
+        table_width = sum(widths)
+
+        if table_width > max_width:
+            widths = self._collapse_widths(
+                widths,
+                [(column.width is None and not column.no_wrap) for column in columns],
+                max_width,
+            )
+            table_width = sum(widths)
+            # last resort, reduce columns evenly
+            if table_width > max_width:
+                excess_width = table_width - max_width
+                widths = ratio_reduce(excess_width, [1] * len(widths), widths, widths)
+                table_width = sum(widths)
+
+            width_ranges = [
+                self._measure_column(console, options.update_width(width), column)
+                for width, column in zip(widths, columns)
+            ]
+            widths = [_range.maximum or 0 for _range in width_ranges]
+
+        if (table_width < max_width and self.expand) or (
+            self.min_width is not None and table_width < (self.min_width - extra_width)
+        ):
+            _max_width = (
+                max_width
+                if self.min_width is None
+                else min(self.min_width - extra_width, max_width)
+            )
+            pad_widths = ratio_distribute(_max_width - table_width, widths)
+            widths = [_width + pad for _width, pad in zip(widths, pad_widths)]
+
+        return widths
+
+    @classmethod
+    def _collapse_widths(
+        cls, widths: List[int], wrapable: List[bool], max_width: int
+    ) -> List[int]:
+        """Reduce widths so that the total is under max_width.
+
+        Args:
+            widths (List[int]): List of widths.
+            wrapable (List[bool]): List of booleans that indicate if a column may shrink.
+            max_width (int): Maximum width to reduce to.
+
+        Returns:
+            List[int]: A new list of widths.
+        """
+        total_width = sum(widths)
+        excess_width = total_width - max_width
+        if any(wrapable):
+            while total_width and excess_width > 0:
+                max_column = max(
+                    width for width, allow_wrap in zip(widths, wrapable) if allow_wrap
+                )
+                second_max_column = max(
+                    width if allow_wrap and width != max_column else 0
+                    for width, allow_wrap in zip(widths, wrapable)
+                )
+                column_difference = max_column - second_max_column
+                ratios = [
+                    (1 if (width == max_column and allow_wrap) else 0)
+                    for width, allow_wrap in zip(widths, wrapable)
+                ]
+                if not any(ratios) or not column_difference:
+                    break
+                max_reduce = [min(excess_width, column_difference)] * len(widths)
+                widths = ratio_reduce(excess_width, ratios, max_reduce, widths)
+
+                total_width = sum(widths)
+                excess_width = total_width - max_width
+        return widths
+
+    def _get_cells(
+        self, console: "Console", column_index: int, column: Column
+    ) -> Iterable[_Cell]:
+        """Get all the cells with padding and optional header."""
+
+        collapse_padding = self.collapse_padding
+        pad_edge = self.pad_edge
+        padding = self.padding
+        any_padding = any(padding)
+
+        first_column = column_index == 0
+        last_column = column_index == len(self.columns) - 1
+
+        _padding_cache: Dict[Tuple[bool, bool], Tuple[int, int, int, int]] = {}
+
+        def get_padding(first_row: bool, last_row: bool) -> Tuple[int, int, int, int]:
+            cached = _padding_cache.get((first_row, last_row))
+            if cached:
+                return cached
+            top, right, bottom, left = padding
+
+            if collapse_padding:
+                if not first_column:
+                    left = max(0, left - right)
+                if not last_row:
+                    bottom = max(0, top - bottom)
+
+            if not pad_edge:
+                if first_column:
+                    left = 0
+                if last_column:
+                    right = 0
+                if first_row:
+                    top = 0
+                if last_row:
+                    bottom = 0
+            _padding = (top, right, bottom, left)
+            _padding_cache[(first_row, last_row)] = _padding
+            return _padding
+
+        raw_cells: List[Tuple[StyleType, "RenderableType"]] = []
+        _append = raw_cells.append
+        get_style = console.get_style
+        if self.show_header:
+            header_style = get_style(self.header_style or "") + get_style(
+                column.header_style
+            )
+            _append((header_style, column.header))
+        cell_style = get_style(column.style or "")
+        for cell in column.cells:
+            _append((cell_style, cell))
+        if self.show_footer:
+            footer_style = get_style(self.footer_style or "") + get_style(
+                column.footer_style
+            )
+            _append((footer_style, column.footer))
+
+        if any_padding:
+            _Padding = Padding
+            for first, last, (style, renderable) in loop_first_last(raw_cells):
+                yield _Cell(
+                    style,
+                    _Padding(renderable, get_padding(first, last)),
+                    getattr(renderable, "vertical", None) or column.vertical,
+                )
+        else:
+            for (style, renderable) in raw_cells:
+                yield _Cell(
+                    style,
+                    renderable,
+                    getattr(renderable, "vertical", None) or column.vertical,
+                )
+
+    def _get_padding_width(self, column_index: int) -> int:
+        """Get extra width from padding."""
+        _, pad_right, _, pad_left = self.padding
+        if self.collapse_padding:
+            if column_index > 0:
+                pad_left = max(0, pad_left - pad_right)
+        return pad_left + pad_right
+
+    def _measure_column(
+        self,
+        console: "Console",
+        options: "ConsoleOptions",
+        column: Column,
+    ) -> Measurement:
+        """Get the minimum and maximum width of the column."""
+
+        max_width = options.max_width
+        if max_width < 1:
+            return Measurement(0, 0)
+
+        padding_width = self._get_padding_width(column._index)
+
+        if column.width is not None:
+            # Fixed width column
+            return Measurement(
+                column.width + padding_width, column.width + padding_width
+            ).with_maximum(max_width)
+        # Flexible column, we need to measure contents
+        min_widths: List[int] = []
+        max_widths: List[int] = []
+        append_min = min_widths.append
+        append_max = max_widths.append
+        get_render_width = Measurement.get
+        for cell in self._get_cells(console, column._index, column):
+            _min, _max = get_render_width(console, options, cell.renderable)
+            append_min(_min)
+            append_max(_max)
+
+        measurement = Measurement(
+            max(min_widths) if min_widths else 1,
+            max(max_widths) if max_widths else max_width,
+        ).with_maximum(max_width)
+        measurement = measurement.clamp(
+            None if column.min_width is None else column.min_width + padding_width,
+            None if column.max_width is None else column.max_width + padding_width,
+        )
+        return measurement
+
+    def _render(
+        self, console: "Console", options: "ConsoleOptions", widths: List[int]
+    ) -> "RenderResult":
+        table_style = console.get_style(self.style or "")
+
+        border_style = table_style + console.get_style(self.border_style or "")
+        _column_cells = (
+            self._get_cells(console, column_index, column)
+            for column_index, column in enumerate(self.columns)
+        )
+        row_cells: List[Tuple[_Cell, ...]] = list(zip(*_column_cells))
+        _box = (
+            self.box.substitute(
+                options, safe=pick_bool(self.safe_box, console.safe_box)
+            )
+            if self.box
+            else None
+        )
+        _box = _box.get_plain_headed_box() if _box and not self.show_header else _box
+
+        new_line = Segment.line()
+
+        columns = self.columns
+        show_header = self.show_header
+        show_footer = self.show_footer
+        show_edge = self.show_edge
+        show_lines = self.show_lines
+        leading = self.leading
+
+        _Segment = Segment
+        if _box:
+            box_segments = [
+                (
+                    _Segment(_box.head_left, border_style),
+                    _Segment(_box.head_right, border_style),
+                    _Segment(_box.head_vertical, border_style),
+                ),
+                (
+                    _Segment(_box.foot_left, border_style),
+                    _Segment(_box.foot_right, border_style),
+                    _Segment(_box.foot_vertical, border_style),
+                ),
+                (
+                    _Segment(_box.mid_left, border_style),
+                    _Segment(_box.mid_right, border_style),
+                    _Segment(_box.mid_vertical, border_style),
+                ),
+            ]
+            if show_edge:
+                yield _Segment(_box.get_top(widths), border_style)
+                yield new_line
+        else:
+            box_segments = []
+
+        get_row_style = self.get_row_style
+        get_style = console.get_style
+
+        for index, (first, last, row_cell) in enumerate(loop_first_last(row_cells)):
+            header_row = first and show_header
+            footer_row = last and show_footer
+            row = (
+                self.rows[index - show_header]
+                if (not header_row and not footer_row)
+                else None
+            )
+            max_height = 1
+            cells: List[List[List[Segment]]] = []
+            if header_row or footer_row:
+                row_style = Style.null()
+            else:
+                row_style = get_style(
+                    get_row_style(console, index - 1 if show_header else index)
+                )
+            for width, cell, column in zip(widths, row_cell, columns):
+                render_options = options.update(
+                    width=width,
+                    justify=column.justify,
+                    no_wrap=column.no_wrap,
+                    overflow=column.overflow,
+                    height=None,
+                )
+                lines = console.render_lines(
+                    cell.renderable,
+                    render_options,
+                    style=get_style(cell.style) + row_style,
+                )
+                max_height = max(max_height, len(lines))
+                cells.append(lines)
+
+            row_height = max(len(cell) for cell in cells)
+
+            def align_cell(
+                cell: List[List[Segment]],
+                vertical: "VerticalAlignMethod",
+                width: int,
+                style: Style,
+            ) -> List[List[Segment]]:
+                if header_row:
+                    vertical = "bottom"
+                elif footer_row:
+                    vertical = "top"
+
+                if vertical == "top":
+                    return _Segment.align_top(cell, width, row_height, style)
+                elif vertical == "middle":
+                    return _Segment.align_middle(cell, width, row_height, style)
+                return _Segment.align_bottom(cell, width, row_height, style)
+
+            cells[:] = [
+                _Segment.set_shape(
+                    align_cell(
+                        cell,
+                        _cell.vertical,
+                        width,
+                        get_style(_cell.style) + row_style,
+                    ),
+                    width,
+                    max_height,
+                )
+                for width, _cell, cell, column in zip(widths, row_cell, cells, columns)
+            ]
+
+            if _box:
+                if last and show_footer:
+                    yield _Segment(
+                        _box.get_row(widths, "foot", edge=show_edge), border_style
+                    )
+                    yield new_line
+                left, right, _divider = box_segments[0 if first else (2 if last else 1)]
+
+                # If the column divider is whitespace also style it with the row background
+                divider = (
+                    _divider
+                    if _divider.text.strip()
+                    else _Segment(
+                        _divider.text, row_style.background_style + _divider.style
+                    )
+                )
+                for line_no in range(max_height):
+                    if show_edge:
+                        yield left
+                    for last_cell, rendered_cell in loop_last(cells):
+                        yield from rendered_cell[line_no]
+                        if not last_cell:
+                            yield divider
+                    if show_edge:
+                        yield right
+                    yield new_line
+            else:
+                for line_no in range(max_height):
+                    for rendered_cell in cells:
+                        yield from rendered_cell[line_no]
+                    yield new_line
+            if _box and first and show_header:
+                yield _Segment(
+                    _box.get_row(widths, "head", edge=show_edge), border_style
+                )
+                yield new_line
+            end_section = row and row.end_section
+            if _box and (show_lines or leading or end_section):
+                if (
+                    not last
+                    and not (show_footer and index >= len(row_cells) - 2)
+                    and not (show_header and header_row)
+                ):
+                    if leading:
+                        yield _Segment(
+                            _box.get_row(widths, "mid", edge=show_edge) * leading,
+                            border_style,
+                        )
+                    else:
+                        yield _Segment(
+                            _box.get_row(widths, "row", edge=show_edge), border_style
+                        )
+                    yield new_line
+
+        if _box and show_edge:
+            yield _Segment(_box.get_bottom(widths), border_style)
+            yield new_line
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console
+    from pip._vendor.rich.highlighter import ReprHighlighter
+    from pip._vendor.rich.table import Table as Table
+
+    from ._timer import timer
+
+    with timer("Table render"):
+        table = Table(
+            title="Star Wars Movies",
+            caption="Rich example table",
+            caption_justify="right",
+        )
+
+        table.add_column(
+            "Released", header_style="bright_cyan", style="cyan", no_wrap=True
+        )
+        table.add_column("Title", style="magenta")
+        table.add_column("Box Office", justify="right", style="green")
+
+        table.add_row(
+            "Dec 20, 2019",
+            "Star Wars: The Rise of Skywalker",
+            "$952,110,690",
+        )
+        table.add_row("May 25, 2018", "Solo: A Star Wars Story", "$393,151,347")
+        table.add_row(
+            "Dec 15, 2017",
+            "Star Wars Ep. V111: The Last Jedi",
+            "$1,332,539,889",
+            style="on black",
+            end_section=True,
+        )
+        table.add_row(
+            "Dec 16, 2016",
+            "Rogue One: A Star Wars Story",
+            "$1,332,439,889",
+        )
+
+        def header(text: str) -> None:
+            console.print()
+            console.rule(highlight(text))
+            console.print()
+
+        console = Console()
+        highlight = ReprHighlighter()
+        header("Example Table")
+        console.print(table, justify="center")
+
+        table.expand = True
+        header("expand=True")
+        console.print(table)
+
+        table.width = 50
+        header("width=50")
+
+        console.print(table, justify="center")
+
+        table.width = None
+        table.expand = False
+        table.row_styles = ["dim", "none"]
+        header("row_styles=['dim', 'none']")
+
+        console.print(table, justify="center")
+
+        table.width = None
+        table.expand = False
+        table.row_styles = ["dim", "none"]
+        table.leading = 1
+        header("leading=1, row_styles=['dim', 'none']")
+        console.print(table, justify="center")
+
+        table.width = None
+        table.expand = False
+        table.row_styles = ["dim", "none"]
+        table.show_lines = True
+        table.leading = 0
+        header("show_lines=True, row_styles=['dim', 'none']")
+        console.print(table, justify="center")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/terminal_theme.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/terminal_theme.py
new file mode 100644
index 0000000..565e9d9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/terminal_theme.py
@@ -0,0 +1,153 @@
+from typing import List, Optional, Tuple
+
+from .color_triplet import ColorTriplet
+from .palette import Palette
+
+_ColorTuple = Tuple[int, int, int]
+
+
+class TerminalTheme:
+    """A color theme used when exporting console content.
+
+    Args:
+        background (Tuple[int, int, int]): The background color.
+        foreground (Tuple[int, int, int]): The foreground (text) color.
+        normal (List[Tuple[int, int, int]]): A list of 8 normal intensity colors.
+        bright (List[Tuple[int, int, int]], optional): A list of 8 bright colors, or None
+            to repeat normal intensity. Defaults to None.
+    """
+
+    def __init__(
+        self,
+        background: _ColorTuple,
+        foreground: _ColorTuple,
+        normal: List[_ColorTuple],
+        bright: Optional[List[_ColorTuple]] = None,
+    ) -> None:
+        self.background_color = ColorTriplet(*background)
+        self.foreground_color = ColorTriplet(*foreground)
+        self.ansi_colors = Palette(normal + (bright or normal))
+
+
+DEFAULT_TERMINAL_THEME = TerminalTheme(
+    (255, 255, 255),
+    (0, 0, 0),
+    [
+        (0, 0, 0),
+        (128, 0, 0),
+        (0, 128, 0),
+        (128, 128, 0),
+        (0, 0, 128),
+        (128, 0, 128),
+        (0, 128, 128),
+        (192, 192, 192),
+    ],
+    [
+        (128, 128, 128),
+        (255, 0, 0),
+        (0, 255, 0),
+        (255, 255, 0),
+        (0, 0, 255),
+        (255, 0, 255),
+        (0, 255, 255),
+        (255, 255, 255),
+    ],
+)
+
+MONOKAI = TerminalTheme(
+    (12, 12, 12),
+    (217, 217, 217),
+    [
+        (26, 26, 26),
+        (244, 0, 95),
+        (152, 224, 36),
+        (253, 151, 31),
+        (157, 101, 255),
+        (244, 0, 95),
+        (88, 209, 235),
+        (196, 197, 181),
+        (98, 94, 76),
+    ],
+    [
+        (244, 0, 95),
+        (152, 224, 36),
+        (224, 213, 97),
+        (157, 101, 255),
+        (244, 0, 95),
+        (88, 209, 235),
+        (246, 246, 239),
+    ],
+)
+DIMMED_MONOKAI = TerminalTheme(
+    (25, 25, 25),
+    (185, 188, 186),
+    [
+        (58, 61, 67),
+        (190, 63, 72),
+        (135, 154, 59),
+        (197, 166, 53),
+        (79, 118, 161),
+        (133, 92, 141),
+        (87, 143, 164),
+        (185, 188, 186),
+        (136, 137, 135),
+    ],
+    [
+        (251, 0, 31),
+        (15, 114, 47),
+        (196, 112, 51),
+        (24, 109, 227),
+        (251, 0, 103),
+        (46, 112, 109),
+        (253, 255, 185),
+    ],
+)
+NIGHT_OWLISH = TerminalTheme(
+    (255, 255, 255),
+    (64, 63, 83),
+    [
+        (1, 22, 39),
+        (211, 66, 62),
+        (42, 162, 152),
+        (218, 170, 1),
+        (72, 118, 214),
+        (64, 63, 83),
+        (8, 145, 106),
+        (122, 129, 129),
+        (122, 129, 129),
+    ],
+    [
+        (247, 110, 110),
+        (73, 208, 197),
+        (218, 194, 107),
+        (92, 167, 228),
+        (105, 112, 152),
+        (0, 201, 144),
+        (152, 159, 177),
+    ],
+)
+
+SVG_EXPORT_THEME = TerminalTheme(
+    (41, 41, 41),
+    (197, 200, 198),
+    [
+        (75, 78, 85),
+        (204, 85, 90),
+        (152, 168, 75),
+        (208, 179, 68),
+        (96, 138, 177),
+        (152, 114, 159),
+        (104, 160, 179),
+        (197, 200, 198),
+        (154, 155, 153),
+    ],
+    [
+        (255, 38, 39),
+        (0, 130, 61),
+        (208, 132, 66),
+        (25, 132, 233),
+        (255, 44, 122),
+        (57, 130, 128),
+        (253, 253, 197),
+    ],
+)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/text.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/text.py
new file mode 100644
index 0000000..12037d0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/text.py
@@ -0,0 +1,1286 @@
+import re
+from functools import partial, reduce
+from math import gcd
+from operator import itemgetter
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Callable,
+    Dict,
+    Iterable,
+    List,
+    NamedTuple,
+    Optional,
+    Tuple,
+    Union,
+)
+
+from ._loop import loop_last
+from ._pick import pick_bool
+from ._wrap import divide_line
+from .align import AlignMethod
+from .cells import cell_len, set_cell_size
+from .containers import Lines
+from .control import strip_control_codes
+from .emoji import EmojiVariant
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment
+from .style import Style, StyleType
+
+if TYPE_CHECKING:  # pragma: no cover
+    from .console import Console, ConsoleOptions, JustifyMethod, OverflowMethod
+
+DEFAULT_JUSTIFY: "JustifyMethod" = "default"
+DEFAULT_OVERFLOW: "OverflowMethod" = "fold"
+
+
+_re_whitespace = re.compile(r"\s+$")
+
+TextType = Union[str, "Text"]
+
+GetStyleCallable = Callable[[str], Optional[StyleType]]
+
+
+class Span(NamedTuple):
+    """A marked up region in some text."""
+
+    start: int
+    """Span start index."""
+    end: int
+    """Span end index."""
+    style: Union[str, Style]
+    """Style associated with the span."""
+
+    def __repr__(self) -> str:
+        return (
+            f"Span({self.start}, {self.end}, {self.style!r})"
+            if (isinstance(self.style, Style) and self.style._meta)
+            else f"Span({self.start}, {self.end}, {repr(self.style)})"
+        )
+
+    def __bool__(self) -> bool:
+        return self.end > self.start
+
+    def split(self, offset: int) -> Tuple["Span", Optional["Span"]]:
+        """Split a span in to 2 from a given offset."""
+
+        if offset < self.start:
+            return self, None
+        if offset >= self.end:
+            return self, None
+
+        start, end, style = self
+        span1 = Span(start, min(end, offset), style)
+        span2 = Span(span1.end, end, style)
+        return span1, span2
+
+    def move(self, offset: int) -> "Span":
+        """Move start and end by a given offset.
+
+        Args:
+            offset (int): Number of characters to add to start and end.
+
+        Returns:
+            TextSpan: A new TextSpan with adjusted position.
+        """
+        start, end, style = self
+        return Span(start + offset, end + offset, style)
+
+    def right_crop(self, offset: int) -> "Span":
+        """Crop the span at the given offset.
+
+        Args:
+            offset (int): A value between start and end.
+
+        Returns:
+            Span: A new (possibly smaller) span.
+        """
+        start, end, style = self
+        if offset >= end:
+            return self
+        return Span(start, min(offset, end), style)
+
+
+class Text(JupyterMixin):
+    """Text with color / style.
+
+    Args:
+        text (str, optional): Default unstyled text. Defaults to "".
+        style (Union[str, Style], optional): Base style for text. Defaults to "".
+        justify (str, optional): Justify method: "left", "center", "full", "right". Defaults to None.
+        overflow (str, optional): Overflow method: "crop", "fold", "ellipsis". Defaults to None.
+        no_wrap (bool, optional): Disable text wrapping, or None for default. Defaults to None.
+        end (str, optional): Character to end text with. Defaults to "\\\\n".
+        tab_size (int): Number of spaces per tab, or ``None`` to use ``console.tab_size``. Defaults to 8.
+        spans (List[Span], optional). A list of predefined style spans. Defaults to None.
+    """
+
+    __slots__ = [
+        "_text",
+        "style",
+        "justify",
+        "overflow",
+        "no_wrap",
+        "end",
+        "tab_size",
+        "_spans",
+        "_length",
+    ]
+
+    def __init__(
+        self,
+        text: str = "",
+        style: Union[str, Style] = "",
+        *,
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        no_wrap: Optional[bool] = None,
+        end: str = "\n",
+        tab_size: Optional[int] = 8,
+        spans: Optional[List[Span]] = None,
+    ) -> None:
+        sanitized_text = strip_control_codes(text)
+        self._text = [sanitized_text]
+        self.style = style
+        self.justify: Optional["JustifyMethod"] = justify
+        self.overflow: Optional["OverflowMethod"] = overflow
+        self.no_wrap = no_wrap
+        self.end = end
+        self.tab_size = tab_size
+        self._spans: List[Span] = spans or []
+        self._length: int = len(sanitized_text)
+
+    def __len__(self) -> int:
+        return self._length
+
+    def __bool__(self) -> bool:
+        return bool(self._length)
+
+    def __str__(self) -> str:
+        return self.plain
+
+    def __repr__(self) -> str:
+        return f"<text {self.plain!r} {self._spans!r}>"
+
+    def __add__(self, other: Any) -> "Text":
+        if isinstance(other, (str, Text)):
+            result = self.copy()
+            result.append(other)
+            return result
+        return NotImplemented
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, Text):
+            return NotImplemented
+        return self.plain == other.plain and self._spans == other._spans
+
+    def __contains__(self, other: object) -> bool:
+        if isinstance(other, str):
+            return other in self.plain
+        elif isinstance(other, Text):
+            return other.plain in self.plain
+        return False
+
+    def __getitem__(self, slice: Union[int, slice]) -> "Text":
+        def get_text_at(offset: int) -> "Text":
+            _Span = Span
+            text = Text(
+                self.plain[offset],
+                spans=[
+                    _Span(0, 1, style)
+                    for start, end, style in self._spans
+                    if end > offset >= start
+                ],
+                end="",
+            )
+            return text
+
+        if isinstance(slice, int):
+            return get_text_at(slice)
+        else:
+            start, stop, step = slice.indices(len(self.plain))
+            if step == 1:
+                lines = self.divide([start, stop])
+                return lines[1]
+            else:
+                # This would be a bit of work to implement efficiently
+                # For now, its not required
+                raise TypeError("slices with step!=1 are not supported")
+
+    @property
+    def cell_len(self) -> int:
+        """Get the number of cells required to render this text."""
+        return cell_len(self.plain)
+
+    @property
+    def markup(self) -> str:
+        """Get console markup to render this Text.
+
+        Returns:
+            str: A string potentially creating markup tags.
+        """
+        from .markup import escape
+
+        output: List[str] = []
+
+        plain = self.plain
+        markup_spans = [
+            (0, False, self.style),
+            *((span.start, False, span.style) for span in self._spans),
+            *((span.end, True, span.style) for span in self._spans),
+            (len(plain), True, self.style),
+        ]
+        markup_spans.sort(key=itemgetter(0, 1))
+        position = 0
+        append = output.append
+        for offset, closing, style in markup_spans:
+            if offset > position:
+                append(escape(plain[position:offset]))
+                position = offset
+            if style:
+                append(f"[/{style}]" if closing else f"[{style}]")
+        markup = "".join(output)
+        return markup
+
+    @classmethod
+    def from_markup(
+        cls,
+        text: str,
+        *,
+        style: Union[str, Style] = "",
+        emoji: bool = True,
+        emoji_variant: Optional[EmojiVariant] = None,
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        end: str = "\n",
+    ) -> "Text":
+        """Create Text instance from markup.
+
+        Args:
+            text (str): A string containing console markup.
+            emoji (bool, optional): Also render emoji code. Defaults to True.
+            justify (str, optional): Justify method: "left", "center", "full", "right". Defaults to None.
+            overflow (str, optional): Overflow method: "crop", "fold", "ellipsis". Defaults to None.
+            end (str, optional): Character to end text with. Defaults to "\\\\n".
+
+        Returns:
+            Text: A Text instance with markup rendered.
+        """
+        from .markup import render
+
+        rendered_text = render(text, style, emoji=emoji, emoji_variant=emoji_variant)
+        rendered_text.justify = justify
+        rendered_text.overflow = overflow
+        rendered_text.end = end
+        return rendered_text
+
+    @classmethod
+    def from_ansi(
+        cls,
+        text: str,
+        *,
+        style: Union[str, Style] = "",
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        no_wrap: Optional[bool] = None,
+        end: str = "\n",
+        tab_size: Optional[int] = 8,
+    ) -> "Text":
+        """Create a Text object from a string containing ANSI escape codes.
+
+        Args:
+            text (str): A string containing escape codes.
+            style (Union[str, Style], optional): Base style for text. Defaults to "".
+            justify (str, optional): Justify method: "left", "center", "full", "right". Defaults to None.
+            overflow (str, optional): Overflow method: "crop", "fold", "ellipsis". Defaults to None.
+            no_wrap (bool, optional): Disable text wrapping, or None for default. Defaults to None.
+            end (str, optional): Character to end text with. Defaults to "\\\\n".
+            tab_size (int): Number of spaces per tab, or ``None`` to use ``console.tab_size``. Defaults to 8.
+        """
+        from .ansi import AnsiDecoder
+
+        joiner = Text(
+            "\n",
+            justify=justify,
+            overflow=overflow,
+            no_wrap=no_wrap,
+            end=end,
+            tab_size=tab_size,
+            style=style,
+        )
+        decoder = AnsiDecoder()
+        result = joiner.join(line for line in decoder.decode(text))
+        return result
+
+    @classmethod
+    def styled(
+        cls,
+        text: str,
+        style: StyleType = "",
+        *,
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+    ) -> "Text":
+        """Construct a Text instance with a pre-applied styled. A style applied in this way won't be used
+        to pad the text when it is justified.
+
+        Args:
+            text (str): A string containing console markup.
+            style (Union[str, Style]): Style to apply to the text. Defaults to "".
+            justify (str, optional): Justify method: "left", "center", "full", "right". Defaults to None.
+            overflow (str, optional): Overflow method: "crop", "fold", "ellipsis". Defaults to None.
+
+        Returns:
+            Text: A text instance with a style applied to the entire string.
+        """
+        styled_text = cls(text, justify=justify, overflow=overflow)
+        styled_text.stylize(style)
+        return styled_text
+
+    @classmethod
+    def assemble(
+        cls,
+        *parts: Union[str, "Text", Tuple[str, StyleType]],
+        style: Union[str, Style] = "",
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        no_wrap: Optional[bool] = None,
+        end: str = "\n",
+        tab_size: int = 8,
+        meta: Optional[Dict[str, Any]] = None,
+    ) -> "Text":
+        """Construct a text instance by combining a sequence of strings with optional styles.
+        The positional arguments should be either strings, or a tuple of string + style.
+
+        Args:
+            style (Union[str, Style], optional): Base style for text. Defaults to "".
+            justify (str, optional): Justify method: "left", "center", "full", "right". Defaults to None.
+            overflow (str, optional): Overflow method: "crop", "fold", "ellipsis". Defaults to None.
+            end (str, optional): Character to end text with. Defaults to "\\\\n".
+            tab_size (int): Number of spaces per tab, or ``None`` to use ``console.tab_size``. Defaults to 8.
+            meta (Dict[str, Any], optional). Meta data to apply to text, or None for no meta data. Default to None
+
+        Returns:
+            Text: A new text instance.
+        """
+        text = cls(
+            style=style,
+            justify=justify,
+            overflow=overflow,
+            no_wrap=no_wrap,
+            end=end,
+            tab_size=tab_size,
+        )
+        append = text.append
+        _Text = Text
+        for part in parts:
+            if isinstance(part, (_Text, str)):
+                append(part)
+            else:
+                append(*part)
+        if meta:
+            text.apply_meta(meta)
+        return text
+
+    @property
+    def plain(self) -> str:
+        """Get the text as a single string."""
+        if len(self._text) != 1:
+            self._text[:] = ["".join(self._text)]
+        return self._text[0]
+
+    @plain.setter
+    def plain(self, new_text: str) -> None:
+        """Set the text to a new value."""
+        if new_text != self.plain:
+            sanitized_text = strip_control_codes(new_text)
+            self._text[:] = [sanitized_text]
+            old_length = self._length
+            self._length = len(sanitized_text)
+            if old_length > self._length:
+                self._trim_spans()
+
+    @property
+    def spans(self) -> List[Span]:
+        """Get a reference to the internal list of spans."""
+        return self._spans
+
+    @spans.setter
+    def spans(self, spans: List[Span]) -> None:
+        """Set spans."""
+        self._spans = spans[:]
+
+    def blank_copy(self, plain: str = "") -> "Text":
+        """Return a new Text instance with copied meta data (but not the string or spans)."""
+        copy_self = Text(
+            plain,
+            style=self.style,
+            justify=self.justify,
+            overflow=self.overflow,
+            no_wrap=self.no_wrap,
+            end=self.end,
+            tab_size=self.tab_size,
+        )
+        return copy_self
+
+    def copy(self) -> "Text":
+        """Return a copy of this instance."""
+        copy_self = Text(
+            self.plain,
+            style=self.style,
+            justify=self.justify,
+            overflow=self.overflow,
+            no_wrap=self.no_wrap,
+            end=self.end,
+            tab_size=self.tab_size,
+        )
+        copy_self._spans[:] = self._spans
+        return copy_self
+
+    def stylize(
+        self,
+        style: Union[str, Style],
+        start: int = 0,
+        end: Optional[int] = None,
+    ) -> None:
+        """Apply a style to the text, or a portion of the text.
+
+        Args:
+            style (Union[str, Style]): Style instance or style definition to apply.
+            start (int): Start offset (negative indexing is supported). Defaults to 0.
+            end (Optional[int], optional): End offset (negative indexing is supported), or None for end of text. Defaults to None.
+
+        """
+        if style:
+            length = len(self)
+            if start < 0:
+                start = length + start
+            if end is None:
+                end = length
+            if end < 0:
+                end = length + end
+            if start >= length or end <= start:
+                # Span not in text or not valid
+                return
+            self._spans.append(Span(start, min(length, end), style))
+
+    def apply_meta(
+        self, meta: Dict[str, Any], start: int = 0, end: Optional[int] = None
+    ) -> None:
+        """Apply meta data to the text, or a portion of the text.
+
+        Args:
+            meta (Dict[str, Any]): A dict of meta information.
+            start (int): Start offset (negative indexing is supported). Defaults to 0.
+            end (Optional[int], optional): End offset (negative indexing is supported), or None for end of text. Defaults to None.
+
+        """
+        style = Style.from_meta(meta)
+        self.stylize(style, start=start, end=end)
+
+    def on(self, meta: Optional[Dict[str, Any]] = None, **handlers: Any) -> "Text":
+        """Apply event handlers (used by Textual project).
+
+        Example:
+            >>> from rich.text import Text
+            >>> text = Text("hello world")
+            >>> text.on(click="view.toggle('world')")
+
+        Args:
+            meta (Dict[str, Any]): Mapping of meta information.
+            **handlers: Keyword args are prefixed with "@" to defined handlers.
+
+        Returns:
+            Text: Self is returned to method may be chained.
+        """
+        meta = {} if meta is None else meta
+        meta.update({f"@{key}": value for key, value in handlers.items()})
+        self.stylize(Style.from_meta(meta))
+        return self
+
+    def remove_suffix(self, suffix: str) -> None:
+        """Remove a suffix if it exists.
+
+        Args:
+            suffix (str): Suffix to remove.
+        """
+        if self.plain.endswith(suffix):
+            self.right_crop(len(suffix))
+
+    def get_style_at_offset(self, console: "Console", offset: int) -> Style:
+        """Get the style of a character at give offset.
+
+        Args:
+            console (~Console): Console where text will be rendered.
+            offset (int): Offset in to text (negative indexing supported)
+
+        Returns:
+            Style: A Style instance.
+        """
+        # TODO: This is a little inefficient, it is only used by full justify
+        if offset < 0:
+            offset = len(self) + offset
+        get_style = console.get_style
+        style = get_style(self.style).copy()
+        for start, end, span_style in self._spans:
+            if end > offset >= start:
+                style += get_style(span_style, default="")
+        return style
+
+    def highlight_regex(
+        self,
+        re_highlight: str,
+        style: Optional[Union[GetStyleCallable, StyleType]] = None,
+        *,
+        style_prefix: str = "",
+    ) -> int:
+        """Highlight text with a regular expression, where group names are
+        translated to styles.
+
+        Args:
+            re_highlight (str): A regular expression.
+            style (Union[GetStyleCallable, StyleType]): Optional style to apply to whole match, or a callable
+                which accepts the matched text and returns a style. Defaults to None.
+            style_prefix (str, optional): Optional prefix to add to style group names.
+
+        Returns:
+            int: Number of regex matches
+        """
+        count = 0
+        append_span = self._spans.append
+        _Span = Span
+        plain = self.plain
+        for match in re.finditer(re_highlight, plain):
+            get_span = match.span
+            if style:
+                start, end = get_span()
+                match_style = style(plain[start:end]) if callable(style) else style
+                if match_style is not None and end > start:
+                    append_span(_Span(start, end, match_style))
+
+            count += 1
+            for name in match.groupdict().keys():
+                start, end = get_span(name)
+                if start != -1 and end > start:
+                    append_span(_Span(start, end, f"{style_prefix}{name}"))
+        return count
+
+    def highlight_words(
+        self,
+        words: Iterable[str],
+        style: Union[str, Style],
+        *,
+        case_sensitive: bool = True,
+    ) -> int:
+        """Highlight words with a style.
+
+        Args:
+            words (Iterable[str]): Worlds to highlight.
+            style (Union[str, Style]): Style to apply.
+            case_sensitive (bool, optional): Enable case sensitive matchings. Defaults to True.
+
+        Returns:
+            int: Number of words highlighted.
+        """
+        re_words = "|".join(re.escape(word) for word in words)
+        add_span = self._spans.append
+        count = 0
+        _Span = Span
+        for match in re.finditer(
+            re_words, self.plain, flags=0 if case_sensitive else re.IGNORECASE
+        ):
+            start, end = match.span(0)
+            add_span(_Span(start, end, style))
+            count += 1
+        return count
+
+    def rstrip(self) -> None:
+        """Strip whitespace from end of text."""
+        self.plain = self.plain.rstrip()
+
+    def rstrip_end(self, size: int) -> None:
+        """Remove whitespace beyond a certain width at the end of the text.
+
+        Args:
+            size (int): The desired size of the text.
+        """
+        text_length = len(self)
+        if text_length > size:
+            excess = text_length - size
+            whitespace_match = _re_whitespace.search(self.plain)
+            if whitespace_match is not None:
+                whitespace_count = len(whitespace_match.group(0))
+                self.right_crop(min(whitespace_count, excess))
+
+    def set_length(self, new_length: int) -> None:
+        """Set new length of the text, clipping or padding is required."""
+        length = len(self)
+        if length != new_length:
+            if length < new_length:
+                self.pad_right(new_length - length)
+            else:
+                self.right_crop(length - new_length)
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Iterable[Segment]:
+        tab_size: int = console.tab_size or self.tab_size or 8
+        justify = self.justify or options.justify or DEFAULT_JUSTIFY
+
+        overflow = self.overflow or options.overflow or DEFAULT_OVERFLOW
+
+        lines = self.wrap(
+            console,
+            options.max_width,
+            justify=justify,
+            overflow=overflow,
+            tab_size=tab_size or 8,
+            no_wrap=pick_bool(self.no_wrap, options.no_wrap, False),
+        )
+        all_lines = Text("\n").join(lines)
+        yield from all_lines.render(console, end=self.end)
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> Measurement:
+        text = self.plain
+        lines = text.splitlines()
+        max_text_width = max(cell_len(line) for line in lines) if lines else 0
+        words = text.split()
+        min_text_width = (
+            max(cell_len(word) for word in words) if words else max_text_width
+        )
+        return Measurement(min_text_width, max_text_width)
+
+    def render(self, console: "Console", end: str = "") -> Iterable["Segment"]:
+        """Render the text as Segments.
+
+        Args:
+            console (Console): Console instance.
+            end (Optional[str], optional): Optional end character.
+
+        Returns:
+            Iterable[Segment]: Result of render that may be written to the console.
+        """
+        _Segment = Segment
+        text = self.plain
+        if not self._spans:
+            yield Segment(text)
+            if end:
+                yield _Segment(end)
+            return
+        get_style = partial(console.get_style, default=Style.null())
+
+        enumerated_spans = list(enumerate(self._spans, 1))
+        style_map = {index: get_style(span.style) for index, span in enumerated_spans}
+        style_map[0] = get_style(self.style)
+
+        spans = [
+            (0, False, 0),
+            *((span.start, False, index) for index, span in enumerated_spans),
+            *((span.end, True, index) for index, span in enumerated_spans),
+            (len(text), True, 0),
+        ]
+        spans.sort(key=itemgetter(0, 1))
+
+        stack: List[int] = []
+        stack_append = stack.append
+        stack_pop = stack.remove
+
+        style_cache: Dict[Tuple[Style, ...], Style] = {}
+        style_cache_get = style_cache.get
+        combine = Style.combine
+
+        def get_current_style() -> Style:
+            """Construct current style from stack."""
+            styles = tuple(style_map[_style_id] for _style_id in sorted(stack))
+            cached_style = style_cache_get(styles)
+            if cached_style is not None:
+                return cached_style
+            current_style = combine(styles)
+            style_cache[styles] = current_style
+            return current_style
+
+        for (offset, leaving, style_id), (next_offset, _, _) in zip(spans, spans[1:]):
+            if leaving:
+                stack_pop(style_id)
+            else:
+                stack_append(style_id)
+            if next_offset > offset:
+                yield _Segment(text[offset:next_offset], get_current_style())
+        if end:
+            yield _Segment(end)
+
+    def join(self, lines: Iterable["Text"]) -> "Text":
+        """Join text together with this instance as the separator.
+
+        Args:
+            lines (Iterable[Text]): An iterable of Text instances to join.
+
+        Returns:
+            Text: A new text instance containing join text.
+        """
+
+        new_text = self.blank_copy()
+
+        def iter_text() -> Iterable["Text"]:
+            if self.plain:
+                for last, line in loop_last(lines):
+                    yield line
+                    if not last:
+                        yield self
+            else:
+                yield from lines
+
+        extend_text = new_text._text.extend
+        append_span = new_text._spans.append
+        extend_spans = new_text._spans.extend
+        offset = 0
+        _Span = Span
+
+        for text in iter_text():
+            extend_text(text._text)
+            if text.style:
+                append_span(_Span(offset, offset + len(text), text.style))
+            extend_spans(
+                _Span(offset + start, offset + end, style)
+                for start, end, style in text._spans
+            )
+            offset += len(text)
+        new_text._length = offset
+        return new_text
+
+    def expand_tabs(self, tab_size: Optional[int] = None) -> None:
+        """Converts tabs to spaces.
+
+        Args:
+            tab_size (int, optional): Size of tabs. Defaults to 8.
+
+        """
+        if "\t" not in self.plain:
+            return
+        pos = 0
+        if tab_size is None:
+            tab_size = self.tab_size
+        assert tab_size is not None
+        result = self.blank_copy()
+        append = result.append
+
+        _style = self.style
+        for line in self.split("\n", include_separator=True):
+            parts = line.split("\t", include_separator=True)
+            for part in parts:
+                if part.plain.endswith("\t"):
+                    part._text = [part.plain[:-1] + " "]
+                    append(part)
+                    pos += len(part)
+                    spaces = tab_size - ((pos - 1) % tab_size) - 1
+                    if spaces:
+                        append(" " * spaces, _style)
+                        pos += spaces
+                else:
+                    append(part)
+        self._text = [result.plain]
+        self._length = len(self.plain)
+        self._spans[:] = result._spans
+
+    def truncate(
+        self,
+        max_width: int,
+        *,
+        overflow: Optional["OverflowMethod"] = None,
+        pad: bool = False,
+    ) -> None:
+        """Truncate text if it is longer that a given width.
+
+        Args:
+            max_width (int): Maximum number of characters in text.
+            overflow (str, optional): Overflow method: "crop", "fold", or "ellipsis". Defaults to None, to use self.overflow.
+            pad (bool, optional): Pad with spaces if the length is less than max_width. Defaults to False.
+        """
+        _overflow = overflow or self.overflow or DEFAULT_OVERFLOW
+        if _overflow != "ignore":
+            length = cell_len(self.plain)
+            if length > max_width:
+                if _overflow == "ellipsis":
+                    self.plain = set_cell_size(self.plain, max_width - 1) + "…"
+                else:
+                    self.plain = set_cell_size(self.plain, max_width)
+            if pad and length < max_width:
+                spaces = max_width - length
+                self._text = [f"{self.plain}{' ' * spaces}"]
+                self._length = len(self.plain)
+
+    def _trim_spans(self) -> None:
+        """Remove or modify any spans that are over the end of the text."""
+        max_offset = len(self.plain)
+        _Span = Span
+        self._spans[:] = [
+            (
+                span
+                if span.end < max_offset
+                else _Span(span.start, min(max_offset, span.end), span.style)
+            )
+            for span in self._spans
+            if span.start < max_offset
+        ]
+
+    def pad(self, count: int, character: str = " ") -> None:
+        """Pad left and right with a given number of characters.
+
+        Args:
+            count (int): Width of padding.
+        """
+        assert len(character) == 1, "Character must be a string of length 1"
+        if count:
+            pad_characters = character * count
+            self.plain = f"{pad_characters}{self.plain}{pad_characters}"
+            _Span = Span
+            self._spans[:] = [
+                _Span(start + count, end + count, style)
+                for start, end, style in self._spans
+            ]
+
+    def pad_left(self, count: int, character: str = " ") -> None:
+        """Pad the left with a given character.
+
+        Args:
+            count (int): Number of characters to pad.
+            character (str, optional): Character to pad with. Defaults to " ".
+        """
+        assert len(character) == 1, "Character must be a string of length 1"
+        if count:
+            self.plain = f"{character * count}{self.plain}"
+            _Span = Span
+            self._spans[:] = [
+                _Span(start + count, end + count, style)
+                for start, end, style in self._spans
+            ]
+
+    def pad_right(self, count: int, character: str = " ") -> None:
+        """Pad the right with a given character.
+
+        Args:
+            count (int): Number of characters to pad.
+            character (str, optional): Character to pad with. Defaults to " ".
+        """
+        assert len(character) == 1, "Character must be a string of length 1"
+        if count:
+            self.plain = f"{self.plain}{character * count}"
+
+    def align(self, align: AlignMethod, width: int, character: str = " ") -> None:
+        """Align text to a given width.
+
+        Args:
+            align (AlignMethod): One of "left", "center", or "right".
+            width (int): Desired width.
+            character (str, optional): Character to pad with. Defaults to " ".
+        """
+        self.truncate(width)
+        excess_space = width - cell_len(self.plain)
+        if excess_space:
+            if align == "left":
+                self.pad_right(excess_space, character)
+            elif align == "center":
+                left = excess_space // 2
+                self.pad_left(left, character)
+                self.pad_right(excess_space - left, character)
+            else:
+                self.pad_left(excess_space, character)
+
+    def append(
+        self, text: Union["Text", str], style: Optional[Union[str, "Style"]] = None
+    ) -> "Text":
+        """Add text with an optional style.
+
+        Args:
+            text (Union[Text, str]): A str or Text to append.
+            style (str, optional): A style name. Defaults to None.
+
+        Returns:
+            Text: Returns self for chaining.
+        """
+
+        if not isinstance(text, (str, Text)):
+            raise TypeError("Only str or Text can be appended to Text")
+
+        if len(text):
+            if isinstance(text, str):
+                sanitized_text = strip_control_codes(text)
+                self._text.append(sanitized_text)
+                offset = len(self)
+                text_length = len(sanitized_text)
+                if style is not None:
+                    self._spans.append(Span(offset, offset + text_length, style))
+                self._length += text_length
+            elif isinstance(text, Text):
+                _Span = Span
+                if style is not None:
+                    raise ValueError(
+                        "style must not be set when appending Text instance"
+                    )
+                text_length = self._length
+                if text.style is not None:
+                    self._spans.append(
+                        _Span(text_length, text_length + len(text), text.style)
+                    )
+                self._text.append(text.plain)
+                self._spans.extend(
+                    _Span(start + text_length, end + text_length, style)
+                    for start, end, style in text._spans
+                )
+                self._length += len(text)
+        return self
+
+    def append_text(self, text: "Text") -> "Text":
+        """Append another Text instance. This method is more performant that Text.append, but
+        only works for Text.
+
+        Returns:
+            Text: Returns self for chaining.
+        """
+        _Span = Span
+        text_length = self._length
+        if text.style is not None:
+            self._spans.append(_Span(text_length, text_length + len(text), text.style))
+        self._text.append(text.plain)
+        self._spans.extend(
+            _Span(start + text_length, end + text_length, style)
+            for start, end, style in text._spans
+        )
+        self._length += len(text)
+        return self
+
+    def append_tokens(
+        self, tokens: Iterable[Tuple[str, Optional[StyleType]]]
+    ) -> "Text":
+        """Append iterable of str and style. Style may be a Style instance or a str style definition.
+
+        Args:
+            pairs (Iterable[Tuple[str, Optional[StyleType]]]): An iterable of tuples containing str content and style.
+
+        Returns:
+            Text: Returns self for chaining.
+        """
+        append_text = self._text.append
+        append_span = self._spans.append
+        _Span = Span
+        offset = len(self)
+        for content, style in tokens:
+            append_text(content)
+            if style is not None:
+                append_span(_Span(offset, offset + len(content), style))
+            offset += len(content)
+        self._length = offset
+        return self
+
+    def copy_styles(self, text: "Text") -> None:
+        """Copy styles from another Text instance.
+
+        Args:
+            text (Text): A Text instance to copy styles from, must be the same length.
+        """
+        self._spans.extend(text._spans)
+
+    def split(
+        self,
+        separator: str = "\n",
+        *,
+        include_separator: bool = False,
+        allow_blank: bool = False,
+    ) -> Lines:
+        """Split rich text in to lines, preserving styles.
+
+        Args:
+            separator (str, optional): String to split on. Defaults to "\\\\n".
+            include_separator (bool, optional): Include the separator in the lines. Defaults to False.
+            allow_blank (bool, optional): Return a blank line if the text ends with a separator. Defaults to False.
+
+        Returns:
+            List[RichText]: A list of rich text, one per line of the original.
+        """
+        assert separator, "separator must not be empty"
+
+        text = self.plain
+        if separator not in text:
+            return Lines([self.copy()])
+
+        if include_separator:
+            lines = self.divide(
+                match.end() for match in re.finditer(re.escape(separator), text)
+            )
+        else:
+
+            def flatten_spans() -> Iterable[int]:
+                for match in re.finditer(re.escape(separator), text):
+                    start, end = match.span()
+                    yield start
+                    yield end
+
+            lines = Lines(
+                line for line in self.divide(flatten_spans()) if line.plain != separator
+            )
+
+        if not allow_blank and text.endswith(separator):
+            lines.pop()
+
+        return lines
+
+    def divide(self, offsets: Iterable[int]) -> Lines:
+        """Divide text in to a number of lines at given offsets.
+
+        Args:
+            offsets (Iterable[int]): Offsets used to divide text.
+
+        Returns:
+            Lines: New RichText instances between offsets.
+        """
+        _offsets = list(offsets)
+
+        if not _offsets:
+            return Lines([self.copy()])
+
+        text = self.plain
+        text_length = len(text)
+        divide_offsets = [0, *_offsets, text_length]
+        line_ranges = list(zip(divide_offsets, divide_offsets[1:]))
+
+        style = self.style
+        justify = self.justify
+        overflow = self.overflow
+        _Text = Text
+        new_lines = Lines(
+            _Text(
+                text[start:end],
+                style=style,
+                justify=justify,
+                overflow=overflow,
+            )
+            for start, end in line_ranges
+        )
+        if not self._spans:
+            return new_lines
+
+        _line_appends = [line._spans.append for line in new_lines._lines]
+        line_count = len(line_ranges)
+        _Span = Span
+
+        for span_start, span_end, style in self._spans:
+
+            lower_bound = 0
+            upper_bound = line_count
+            start_line_no = (lower_bound + upper_bound) // 2
+
+            while True:
+                line_start, line_end = line_ranges[start_line_no]
+                if span_start < line_start:
+                    upper_bound = start_line_no - 1
+                elif span_start > line_end:
+                    lower_bound = start_line_no + 1
+                else:
+                    break
+                start_line_no = (lower_bound + upper_bound) // 2
+
+            if span_end < line_end:
+                end_line_no = start_line_no
+            else:
+                end_line_no = lower_bound = start_line_no
+                upper_bound = line_count
+
+                while True:
+                    line_start, line_end = line_ranges[end_line_no]
+                    if span_end < line_start:
+                        upper_bound = end_line_no - 1
+                    elif span_end > line_end:
+                        lower_bound = end_line_no + 1
+                    else:
+                        break
+                    end_line_no = (lower_bound + upper_bound) // 2
+
+            for line_no in range(start_line_no, end_line_no + 1):
+                line_start, line_end = line_ranges[line_no]
+                new_start = max(0, span_start - line_start)
+                new_end = min(span_end - line_start, line_end - line_start)
+                if new_end > new_start:
+                    _line_appends[line_no](_Span(new_start, new_end, style))
+
+        return new_lines
+
+    def right_crop(self, amount: int = 1) -> None:
+        """Remove a number of characters from the end of the text."""
+        max_offset = len(self.plain) - amount
+        _Span = Span
+        self._spans[:] = [
+            (
+                span
+                if span.end < max_offset
+                else _Span(span.start, min(max_offset, span.end), span.style)
+            )
+            for span in self._spans
+            if span.start < max_offset
+        ]
+        self._text = [self.plain[:-amount]]
+        self._length -= amount
+
+    def wrap(
+        self,
+        console: "Console",
+        width: int,
+        *,
+        justify: Optional["JustifyMethod"] = None,
+        overflow: Optional["OverflowMethod"] = None,
+        tab_size: int = 8,
+        no_wrap: Optional[bool] = None,
+    ) -> Lines:
+        """Word wrap the text.
+
+        Args:
+            console (Console): Console instance.
+            width (int): Number of characters per line.
+            emoji (bool, optional): Also render emoji code. Defaults to True.
+            justify (str, optional): Justify method: "default", "left", "center", "full", "right". Defaults to "default".
+            overflow (str, optional): Overflow method: "crop", "fold", or "ellipsis". Defaults to None.
+            tab_size (int, optional): Default tab size. Defaults to 8.
+            no_wrap (bool, optional): Disable wrapping, Defaults to False.
+
+        Returns:
+            Lines: Number of lines.
+        """
+        wrap_justify = justify or self.justify or DEFAULT_JUSTIFY
+        wrap_overflow = overflow or self.overflow or DEFAULT_OVERFLOW
+
+        no_wrap = pick_bool(no_wrap, self.no_wrap, False) or overflow == "ignore"
+
+        lines = Lines()
+        for line in self.split(allow_blank=True):
+            if "\t" in line:
+                line.expand_tabs(tab_size)
+            if no_wrap:
+                new_lines = Lines([line])
+            else:
+                offsets = divide_line(str(line), width, fold=wrap_overflow == "fold")
+                new_lines = line.divide(offsets)
+            for line in new_lines:
+                line.rstrip_end(width)
+            if wrap_justify:
+                new_lines.justify(
+                    console, width, justify=wrap_justify, overflow=wrap_overflow
+                )
+            for line in new_lines:
+                line.truncate(width, overflow=wrap_overflow)
+            lines.extend(new_lines)
+        return lines
+
+    def fit(self, width: int) -> Lines:
+        """Fit the text in to given width by chopping in to lines.
+
+        Args:
+            width (int): Maximum characters in a line.
+
+        Returns:
+            Lines: List of lines.
+        """
+        lines: Lines = Lines()
+        append = lines.append
+        for line in self.split():
+            line.set_length(width)
+            append(line)
+        return lines
+
+    def detect_indentation(self) -> int:
+        """Auto-detect indentation of code.
+
+        Returns:
+            int: Number of spaces used to indent code.
+        """
+
+        _indentations = {
+            len(match.group(1))
+            for match in re.finditer(r"^( *)(.*)$", self.plain, flags=re.MULTILINE)
+        }
+
+        try:
+            indentation = (
+                reduce(gcd, [indent for indent in _indentations if not indent % 2]) or 1
+            )
+        except TypeError:
+            indentation = 1
+
+        return indentation
+
+    def with_indent_guides(
+        self,
+        indent_size: Optional[int] = None,
+        *,
+        character: str = "│",
+        style: StyleType = "dim green",
+    ) -> "Text":
+        """Adds indent guide lines to text.
+
+        Args:
+            indent_size (Optional[int]): Size of indentation, or None to auto detect. Defaults to None.
+            character (str, optional): Character to use for indentation. Defaults to "│".
+            style (Union[Style, str], optional): Style of indent guides.
+
+        Returns:
+            Text: New text with indentation guides.
+        """
+
+        _indent_size = self.detect_indentation() if indent_size is None else indent_size
+
+        text = self.copy()
+        text.expand_tabs()
+        indent_line = f"{character}{' ' * (_indent_size - 1)}"
+
+        re_indent = re.compile(r"^( *)(.*)$")
+        new_lines: List[Text] = []
+        add_line = new_lines.append
+        blank_lines = 0
+        for line in text.split(allow_blank=True):
+            match = re_indent.match(line.plain)
+            if not match or not match.group(2):
+                blank_lines += 1
+                continue
+            indent = match.group(1)
+            full_indents, remaining_space = divmod(len(indent), _indent_size)
+            new_indent = f"{indent_line * full_indents}{' ' * remaining_space}"
+            line.plain = new_indent + line.plain[len(new_indent) :]
+            line.stylize(style, 0, len(new_indent))
+            if blank_lines:
+                new_lines.extend([Text(new_indent, style=style)] * blank_lines)
+                blank_lines = 0
+            add_line(line)
+        if blank_lines:
+            new_lines.extend([Text("", style=style)] * blank_lines)
+
+        new_text = text.blank_copy("\n").join(new_lines)
+        return new_text
+
+
+if __name__ == "__main__":  # pragma: no cover
+    from pip._vendor.rich.console import Console
+
+    text = Text(
+        """\nLorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n"""
+    )
+    text.highlight_words(["Lorem"], "bold")
+    text.highlight_words(["ipsum"], "italic")
+
+    console = Console()
+
+    console.rule("justify='left'")
+    console.print(text, style="red")
+    console.print()
+
+    console.rule("justify='center'")
+    console.print(text, style="green", justify="center")
+    console.print()
+
+    console.rule("justify='right'")
+    console.print(text, style="blue", justify="right")
+    console.print()
+
+    console.rule("justify='full'")
+    console.print(text, style="magenta", justify="full")
+    console.print()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/theme.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/theme.py
new file mode 100644
index 0000000..bfb3c7f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/theme.py
@@ -0,0 +1,112 @@
+import configparser
+from typing import Dict, List, IO, Mapping, Optional
+
+from .default_styles import DEFAULT_STYLES
+from .style import Style, StyleType
+
+
+class Theme:
+    """A container for style information, used by :class:`~rich.console.Console`.
+
+    Args:
+        styles (Dict[str, Style], optional): A mapping of style names on to styles. Defaults to None for a theme with no styles.
+        inherit (bool, optional): Inherit default styles. Defaults to True.
+    """
+
+    styles: Dict[str, Style]
+
+    def __init__(
+        self, styles: Optional[Mapping[str, StyleType]] = None, inherit: bool = True
+    ):
+        self.styles = DEFAULT_STYLES.copy() if inherit else {}
+        if styles is not None:
+            self.styles.update(
+                {
+                    name: style if isinstance(style, Style) else Style.parse(style)
+                    for name, style in styles.items()
+                }
+            )
+
+    @property
+    def config(self) -> str:
+        """Get contents of a config file for this theme."""
+        config = "[styles]\n" + "\n".join(
+            f"{name} = {style}" for name, style in sorted(self.styles.items())
+        )
+        return config
+
+    @classmethod
+    def from_file(
+        cls, config_file: IO[str], source: Optional[str] = None, inherit: bool = True
+    ) -> "Theme":
+        """Load a theme from a text mode file.
+
+        Args:
+            config_file (IO[str]): An open conf file.
+            source (str, optional): The filename of the open file. Defaults to None.
+            inherit (bool, optional): Inherit default styles. Defaults to True.
+
+        Returns:
+            Theme: A New theme instance.
+        """
+        config = configparser.ConfigParser()
+        config.read_file(config_file, source=source)
+        styles = {name: Style.parse(value) for name, value in config.items("styles")}
+        theme = Theme(styles, inherit=inherit)
+        return theme
+
+    @classmethod
+    def read(cls, path: str, inherit: bool = True) -> "Theme":
+        """Read a theme from a path.
+
+        Args:
+            path (str): Path to a config file readable by Python configparser module.
+            inherit (bool, optional): Inherit default styles. Defaults to True.
+
+        Returns:
+            Theme: A new theme instance.
+        """
+        with open(path, "rt") as config_file:
+            return cls.from_file(config_file, source=path, inherit=inherit)
+
+
+class ThemeStackError(Exception):
+    """Base exception for errors related to the theme stack."""
+
+
+class ThemeStack:
+    """A stack of themes.
+
+    Args:
+        theme (Theme): A theme instance
+    """
+
+    def __init__(self, theme: Theme) -> None:
+        self._entries: List[Dict[str, Style]] = [theme.styles]
+        self.get = self._entries[-1].get
+
+    def push_theme(self, theme: Theme, inherit: bool = True) -> None:
+        """Push a theme on the top of the stack.
+
+        Args:
+            theme (Theme): A Theme instance.
+            inherit (boolean, optional): Inherit styles from current top of stack.
+        """
+        styles: Dict[str, Style]
+        styles = (
+            {**self._entries[-1], **theme.styles} if inherit else theme.styles.copy()
+        )
+        self._entries.append(styles)
+        self.get = self._entries[-1].get
+
+    def pop_theme(self) -> None:
+        """Pop (and discard) the top-most theme."""
+        if len(self._entries) == 1:
+            raise ThemeStackError("Unable to pop base theme")
+        self._entries.pop()
+        self.get = self._entries[-1].get
+
+
+if __name__ == "__main__":  # pragma: no cover
+    theme = Theme()
+    print(theme.config)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/themes.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/themes.py
new file mode 100644
index 0000000..bf6db10
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/themes.py
@@ -0,0 +1,5 @@
+from .default_styles import DEFAULT_STYLES
+from .theme import Theme
+
+
+DEFAULT = Theme(DEFAULT_STYLES)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/traceback.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/traceback.py
new file mode 100644
index 0000000..e5023c7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/traceback.py
@@ -0,0 +1,679 @@
+from __future__ import absolute_import
+
+import os
+import platform
+import sys
+from dataclasses import dataclass, field
+from traceback import walk_tb
+from types import ModuleType, TracebackType
+from typing import Any, Callable, Dict, Iterable, List, Optional, Sequence, Type, Union
+
+from pip._vendor.pygments.lexers import guess_lexer_for_filename
+from pip._vendor.pygments.token import Comment, Keyword, Name, Number, Operator, String
+from pip._vendor.pygments.token import Text as TextToken
+from pip._vendor.pygments.token import Token
+from pip._vendor.pygments.util import ClassNotFound
+
+from . import pretty
+from ._loop import loop_last
+from .columns import Columns
+from .console import Console, ConsoleOptions, ConsoleRenderable, RenderResult, group
+from .constrain import Constrain
+from .highlighter import RegexHighlighter, ReprHighlighter
+from .panel import Panel
+from .scope import render_scope
+from .style import Style
+from .syntax import Syntax
+from .text import Text
+from .theme import Theme
+
+WINDOWS = platform.system() == "Windows"
+
+LOCALS_MAX_LENGTH = 10
+LOCALS_MAX_STRING = 80
+
+
+def install(
+    *,
+    console: Optional[Console] = None,
+    width: Optional[int] = 100,
+    extra_lines: int = 3,
+    theme: Optional[str] = None,
+    word_wrap: bool = False,
+    show_locals: bool = False,
+    indent_guides: bool = True,
+    suppress: Iterable[Union[str, ModuleType]] = (),
+    max_frames: int = 100,
+) -> Callable[[Type[BaseException], BaseException, Optional[TracebackType]], Any]:
+    """Install a rich traceback handler.
+
+    Once installed, any tracebacks will be printed with syntax highlighting and rich formatting.
+
+
+    Args:
+        console (Optional[Console], optional): Console to write exception to. Default uses internal Console instance.
+        width (Optional[int], optional): Width (in characters) of traceback. Defaults to 100.
+        extra_lines (int, optional): Extra lines of code. Defaults to 3.
+        theme (Optional[str], optional): Pygments theme to use in traceback. Defaults to ``None`` which will pick
+            a theme appropriate for the platform.
+        word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
+        show_locals (bool, optional): Enable display of local variables. Defaults to False.
+        indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
+        suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
+
+    Returns:
+        Callable: The previous exception handler that was replaced.
+
+    """
+    traceback_console = Console(file=sys.stderr) if console is None else console
+
+    def excepthook(
+        type_: Type[BaseException],
+        value: BaseException,
+        traceback: Optional[TracebackType],
+    ) -> None:
+        traceback_console.print(
+            Traceback.from_exception(
+                type_,
+                value,
+                traceback,
+                width=width,
+                extra_lines=extra_lines,
+                theme=theme,
+                word_wrap=word_wrap,
+                show_locals=show_locals,
+                indent_guides=indent_guides,
+                suppress=suppress,
+                max_frames=max_frames,
+            )
+        )
+
+    def ipy_excepthook_closure(ip: Any) -> None:  # pragma: no cover
+        tb_data = {}  # store information about showtraceback call
+        default_showtraceback = ip.showtraceback  # keep reference of default traceback
+
+        def ipy_show_traceback(*args: Any, **kwargs: Any) -> None:
+            """wrap the default ip.showtraceback to store info for ip._showtraceback"""
+            nonlocal tb_data
+            tb_data = kwargs
+            default_showtraceback(*args, **kwargs)
+
+        def ipy_display_traceback(
+            *args: Any, is_syntax: bool = False, **kwargs: Any
+        ) -> None:
+            """Internally called traceback from ip._showtraceback"""
+            nonlocal tb_data
+            exc_tuple = ip._get_exc_info()
+
+            # do not display trace on syntax error
+            tb: Optional[TracebackType] = None if is_syntax else exc_tuple[2]
+
+            # determine correct tb_offset
+            compiled = tb_data.get("running_compiled_code", False)
+            tb_offset = tb_data.get("tb_offset", 1 if compiled else 0)
+            # remove ipython internal frames from trace with tb_offset
+            for _ in range(tb_offset):
+                if tb is None:
+                    break
+                tb = tb.tb_next
+
+            excepthook(exc_tuple[0], exc_tuple[1], tb)
+            tb_data = {}  # clear data upon usage
+
+        # replace _showtraceback instead of showtraceback to allow ipython features such as debugging to work
+        # this is also what the ipython docs recommends to modify when subclassing InteractiveShell
+        ip._showtraceback = ipy_display_traceback
+        # add wrapper to capture tb_data
+        ip.showtraceback = ipy_show_traceback
+        ip.showsyntaxerror = lambda *args, **kwargs: ipy_display_traceback(
+            *args, is_syntax=True, **kwargs
+        )
+
+    try:  # pragma: no cover
+        # if within ipython, use customized traceback
+        ip = get_ipython()  # type: ignore[name-defined]
+        ipy_excepthook_closure(ip)
+        return sys.excepthook
+    except Exception:
+        # otherwise use default system hook
+        old_excepthook = sys.excepthook
+        sys.excepthook = excepthook
+        return old_excepthook
+
+
+@dataclass
+class Frame:
+    filename: str
+    lineno: int
+    name: str
+    line: str = ""
+    locals: Optional[Dict[str, pretty.Node]] = None
+
+
+@dataclass
+class _SyntaxError:
+    offset: int
+    filename: str
+    line: str
+    lineno: int
+    msg: str
+
+
+@dataclass
+class Stack:
+    exc_type: str
+    exc_value: str
+    syntax_error: Optional[_SyntaxError] = None
+    is_cause: bool = False
+    frames: List[Frame] = field(default_factory=list)
+
+
+@dataclass
+class Trace:
+    stacks: List[Stack]
+
+
+class PathHighlighter(RegexHighlighter):
+    highlights = [r"(?P<dim>.*/)(?P<bold>.+)"]
+
+
+class Traceback:
+    """A Console renderable that renders a traceback.
+
+    Args:
+        trace (Trace, optional): A `Trace` object produced from `extract`. Defaults to None, which uses
+            the last exception.
+        width (Optional[int], optional): Number of characters used to traceback. Defaults to 100.
+        extra_lines (int, optional): Additional lines of code to render. Defaults to 3.
+        theme (str, optional): Override pygments theme used in traceback.
+        word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
+        show_locals (bool, optional): Enable display of local variables. Defaults to False.
+        indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
+        locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+            Defaults to 10.
+        locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
+        suppress (Sequence[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
+        max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
+
+    """
+
+    LEXERS = {
+        "": "text",
+        ".py": "python",
+        ".pxd": "cython",
+        ".pyx": "cython",
+        ".pxi": "pyrex",
+    }
+
+    def __init__(
+        self,
+        trace: Optional[Trace] = None,
+        width: Optional[int] = 100,
+        extra_lines: int = 3,
+        theme: Optional[str] = None,
+        word_wrap: bool = False,
+        show_locals: bool = False,
+        indent_guides: bool = True,
+        locals_max_length: int = LOCALS_MAX_LENGTH,
+        locals_max_string: int = LOCALS_MAX_STRING,
+        suppress: Iterable[Union[str, ModuleType]] = (),
+        max_frames: int = 100,
+    ):
+        if trace is None:
+            exc_type, exc_value, traceback = sys.exc_info()
+            if exc_type is None or exc_value is None or traceback is None:
+                raise ValueError(
+                    "Value for 'trace' required if not called in except: block"
+                )
+            trace = self.extract(
+                exc_type, exc_value, traceback, show_locals=show_locals
+            )
+        self.trace = trace
+        self.width = width
+        self.extra_lines = extra_lines
+        self.theme = Syntax.get_theme(theme or "ansi_dark")
+        self.word_wrap = word_wrap
+        self.show_locals = show_locals
+        self.indent_guides = indent_guides
+        self.locals_max_length = locals_max_length
+        self.locals_max_string = locals_max_string
+
+        self.suppress: Sequence[str] = []
+        for suppress_entity in suppress:
+            if not isinstance(suppress_entity, str):
+                assert (
+                    suppress_entity.__file__ is not None
+                ), f"{suppress_entity!r} must be a module with '__file__' attribute"
+                path = os.path.dirname(suppress_entity.__file__)
+            else:
+                path = suppress_entity
+            path = os.path.normpath(os.path.abspath(path))
+            self.suppress.append(path)
+        self.max_frames = max(4, max_frames) if max_frames > 0 else 0
+
+    @classmethod
+    def from_exception(
+        cls,
+        exc_type: Type[Any],
+        exc_value: BaseException,
+        traceback: Optional[TracebackType],
+        width: Optional[int] = 100,
+        extra_lines: int = 3,
+        theme: Optional[str] = None,
+        word_wrap: bool = False,
+        show_locals: bool = False,
+        indent_guides: bool = True,
+        locals_max_length: int = LOCALS_MAX_LENGTH,
+        locals_max_string: int = LOCALS_MAX_STRING,
+        suppress: Iterable[Union[str, ModuleType]] = (),
+        max_frames: int = 100,
+    ) -> "Traceback":
+        """Create a traceback from exception info
+
+        Args:
+            exc_type (Type[BaseException]): Exception type.
+            exc_value (BaseException): Exception value.
+            traceback (TracebackType): Python Traceback object.
+            width (Optional[int], optional): Number of characters used to traceback. Defaults to 100.
+            extra_lines (int, optional): Additional lines of code to render. Defaults to 3.
+            theme (str, optional): Override pygments theme used in traceback.
+            word_wrap (bool, optional): Enable word wrapping of long lines. Defaults to False.
+            show_locals (bool, optional): Enable display of local variables. Defaults to False.
+            indent_guides (bool, optional): Enable indent guides in code and locals. Defaults to True.
+            locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+                Defaults to 10.
+            locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
+            suppress (Iterable[Union[str, ModuleType]]): Optional sequence of modules or paths to exclude from traceback.
+            max_frames (int): Maximum number of frames to show in a traceback, 0 for no maximum. Defaults to 100.
+
+        Returns:
+            Traceback: A Traceback instance that may be printed.
+        """
+        rich_traceback = cls.extract(
+            exc_type, exc_value, traceback, show_locals=show_locals
+        )
+        return cls(
+            rich_traceback,
+            width=width,
+            extra_lines=extra_lines,
+            theme=theme,
+            word_wrap=word_wrap,
+            show_locals=show_locals,
+            indent_guides=indent_guides,
+            locals_max_length=locals_max_length,
+            locals_max_string=locals_max_string,
+            suppress=suppress,
+            max_frames=max_frames,
+        )
+
+    @classmethod
+    def extract(
+        cls,
+        exc_type: Type[BaseException],
+        exc_value: BaseException,
+        traceback: Optional[TracebackType],
+        show_locals: bool = False,
+        locals_max_length: int = LOCALS_MAX_LENGTH,
+        locals_max_string: int = LOCALS_MAX_STRING,
+    ) -> Trace:
+        """Extract traceback information.
+
+        Args:
+            exc_type (Type[BaseException]): Exception type.
+            exc_value (BaseException): Exception value.
+            traceback (TracebackType): Python Traceback object.
+            show_locals (bool, optional): Enable display of local variables. Defaults to False.
+            locals_max_length (int, optional): Maximum length of containers before abbreviating, or None for no abbreviation.
+                Defaults to 10.
+            locals_max_string (int, optional): Maximum length of string before truncating, or None to disable. Defaults to 80.
+
+        Returns:
+            Trace: A Trace instance which you can use to construct a `Traceback`.
+        """
+
+        stacks: List[Stack] = []
+        is_cause = False
+
+        from pip._vendor.rich import _IMPORT_CWD
+
+        def safe_str(_object: Any) -> str:
+            """Don't allow exceptions from __str__ to propegate."""
+            try:
+                return str(_object)
+            except Exception:
+                return "<exception str() failed>"
+
+        while True:
+            stack = Stack(
+                exc_type=safe_str(exc_type.__name__),
+                exc_value=safe_str(exc_value),
+                is_cause=is_cause,
+            )
+
+            if isinstance(exc_value, SyntaxError):
+                stack.syntax_error = _SyntaxError(
+                    offset=exc_value.offset or 0,
+                    filename=exc_value.filename or "?",
+                    lineno=exc_value.lineno or 0,
+                    line=exc_value.text or "",
+                    msg=exc_value.msg,
+                )
+
+            stacks.append(stack)
+            append = stack.frames.append
+
+            for frame_summary, line_no in walk_tb(traceback):
+                filename = frame_summary.f_code.co_filename
+                if filename and not filename.startswith("<"):
+                    if not os.path.isabs(filename):
+                        filename = os.path.join(_IMPORT_CWD, filename)
+                if frame_summary.f_locals.get("_rich_traceback_omit", False):
+                    continue
+                frame = Frame(
+                    filename=filename or "?",
+                    lineno=line_no,
+                    name=frame_summary.f_code.co_name,
+                    locals={
+                        key: pretty.traverse(
+                            value,
+                            max_length=locals_max_length,
+                            max_string=locals_max_string,
+                        )
+                        for key, value in frame_summary.f_locals.items()
+                    }
+                    if show_locals
+                    else None,
+                )
+                append(frame)
+                if frame_summary.f_locals.get("_rich_traceback_guard", False):
+                    del stack.frames[:]
+
+            cause = getattr(exc_value, "__cause__", None)
+            if cause and cause.__traceback__:
+                exc_type = cause.__class__
+                exc_value = cause
+                traceback = cause.__traceback__
+                is_cause = True
+                continue
+
+            cause = exc_value.__context__
+            if (
+                cause
+                and cause.__traceback__
+                and not getattr(exc_value, "__suppress_context__", False)
+            ):
+                exc_type = cause.__class__
+                exc_value = cause
+                traceback = cause.__traceback__
+                is_cause = False
+                continue
+            # No cover, code is reached but coverage doesn't recognize it.
+            break  # pragma: no cover
+
+        trace = Trace(stacks=stacks)
+        return trace
+
+    def __rich_console__(
+        self, console: Console, options: ConsoleOptions
+    ) -> RenderResult:
+        theme = self.theme
+        background_style = theme.get_background_style()
+        token_style = theme.get_style_for_token
+
+        traceback_theme = Theme(
+            {
+                "pretty": token_style(TextToken),
+                "pygments.text": token_style(Token),
+                "pygments.string": token_style(String),
+                "pygments.function": token_style(Name.Function),
+                "pygments.number": token_style(Number),
+                "repr.indent": token_style(Comment) + Style(dim=True),
+                "repr.str": token_style(String),
+                "repr.brace": token_style(TextToken) + Style(bold=True),
+                "repr.number": token_style(Number),
+                "repr.bool_true": token_style(Keyword.Constant),
+                "repr.bool_false": token_style(Keyword.Constant),
+                "repr.none": token_style(Keyword.Constant),
+                "scope.border": token_style(String.Delimiter),
+                "scope.equals": token_style(Operator),
+                "scope.key": token_style(Name),
+                "scope.key.special": token_style(Name.Constant) + Style(dim=True),
+            },
+            inherit=False,
+        )
+
+        highlighter = ReprHighlighter()
+        for last, stack in loop_last(reversed(self.trace.stacks)):
+            if stack.frames:
+                stack_renderable: ConsoleRenderable = Panel(
+                    self._render_stack(stack),
+                    title="[traceback.title]Traceback [dim](most recent call last)",
+                    style=background_style,
+                    border_style="traceback.border",
+                    expand=True,
+                    padding=(0, 1),
+                )
+                stack_renderable = Constrain(stack_renderable, self.width)
+                with console.use_theme(traceback_theme):
+                    yield stack_renderable
+            if stack.syntax_error is not None:
+                with console.use_theme(traceback_theme):
+                    yield Constrain(
+                        Panel(
+                            self._render_syntax_error(stack.syntax_error),
+                            style=background_style,
+                            border_style="traceback.border.syntax_error",
+                            expand=True,
+                            padding=(0, 1),
+                            width=self.width,
+                        ),
+                        self.width,
+                    )
+                yield Text.assemble(
+                    (f"{stack.exc_type}: ", "traceback.exc_type"),
+                    highlighter(stack.syntax_error.msg),
+                )
+            elif stack.exc_value:
+                yield Text.assemble(
+                    (f"{stack.exc_type}: ", "traceback.exc_type"),
+                    highlighter(stack.exc_value),
+                )
+            else:
+                yield Text.assemble((f"{stack.exc_type}", "traceback.exc_type"))
+
+            if not last:
+                if stack.is_cause:
+                    yield Text.from_markup(
+                        "\n[i]The above exception was the direct cause of the following exception:\n",
+                    )
+                else:
+                    yield Text.from_markup(
+                        "\n[i]During handling of the above exception, another exception occurred:\n",
+                    )
+
+    @group()
+    def _render_syntax_error(self, syntax_error: _SyntaxError) -> RenderResult:
+        highlighter = ReprHighlighter()
+        path_highlighter = PathHighlighter()
+        if syntax_error.filename != "<stdin>":
+            text = Text.assemble(
+                (f" {syntax_error.filename}", "pygments.string"),
+                (":", "pygments.text"),
+                (str(syntax_error.lineno), "pygments.number"),
+                style="pygments.text",
+            )
+            yield path_highlighter(text)
+        syntax_error_text = highlighter(syntax_error.line.rstrip())
+        syntax_error_text.no_wrap = True
+        offset = min(syntax_error.offset - 1, len(syntax_error_text))
+        syntax_error_text.stylize("bold underline", offset, offset)
+        syntax_error_text += Text.from_markup(
+            "\n" + " " * offset + "[traceback.offset]▲[/]",
+            style="pygments.text",
+        )
+        yield syntax_error_text
+
+    @classmethod
+    def _guess_lexer(cls, filename: str, code: str) -> str:
+        ext = os.path.splitext(filename)[-1]
+        if not ext:
+            # No extension, look at first line to see if it is a hashbang
+            # Note, this is an educated guess and not a guarantee
+            # If it fails, the only downside is that the code is highlighted strangely
+            new_line_index = code.index("\n")
+            first_line = code[:new_line_index] if new_line_index != -1 else code
+            if first_line.startswith("#!") and "python" in first_line.lower():
+                return "python"
+        try:
+            return cls.LEXERS.get(ext) or guess_lexer_for_filename(filename, code).name
+        except ClassNotFound:
+            return "text"
+
+    @group()
+    def _render_stack(self, stack: Stack) -> RenderResult:
+        path_highlighter = PathHighlighter()
+        theme = self.theme
+        code_cache: Dict[str, str] = {}
+
+        def read_code(filename: str) -> str:
+            """Read files, and cache results on filename.
+
+            Args:
+                filename (str): Filename to read
+
+            Returns:
+                str: Contents of file
+            """
+            code = code_cache.get(filename)
+            if code is None:
+                with open(
+                    filename, "rt", encoding="utf-8", errors="replace"
+                ) as code_file:
+                    code = code_file.read()
+                code_cache[filename] = code
+            return code
+
+        def render_locals(frame: Frame) -> Iterable[ConsoleRenderable]:
+            if frame.locals:
+                yield render_scope(
+                    frame.locals,
+                    title="locals",
+                    indent_guides=self.indent_guides,
+                    max_length=self.locals_max_length,
+                    max_string=self.locals_max_string,
+                )
+
+        exclude_frames: Optional[range] = None
+        if self.max_frames != 0:
+            exclude_frames = range(
+                self.max_frames // 2,
+                len(stack.frames) - self.max_frames // 2,
+            )
+
+        excluded = False
+        for frame_index, frame in enumerate(stack.frames):
+
+            if exclude_frames and frame_index in exclude_frames:
+                excluded = True
+                continue
+
+            if excluded:
+                assert exclude_frames is not None
+                yield Text(
+                    f"\n... {len(exclude_frames)} frames hidden ...",
+                    justify="center",
+                    style="traceback.error",
+                )
+                excluded = False
+
+            first = frame_index == 0
+            frame_filename = frame.filename
+            suppressed = any(frame_filename.startswith(path) for path in self.suppress)
+
+            text = Text.assemble(
+                path_highlighter(Text(frame.filename, style="pygments.string")),
+                (":", "pygments.text"),
+                (str(frame.lineno), "pygments.number"),
+                " in ",
+                (frame.name, "pygments.function"),
+                style="pygments.text",
+            )
+            if not frame.filename.startswith("<") and not first:
+                yield ""
+            yield text
+            if frame.filename.startswith("<"):
+                yield from render_locals(frame)
+                continue
+            if not suppressed:
+                try:
+                    code = read_code(frame.filename)
+                    lexer_name = self._guess_lexer(frame.filename, code)
+                    syntax = Syntax(
+                        code,
+                        lexer_name,
+                        theme=theme,
+                        line_numbers=True,
+                        line_range=(
+                            frame.lineno - self.extra_lines,
+                            frame.lineno + self.extra_lines,
+                        ),
+                        highlight_lines={frame.lineno},
+                        word_wrap=self.word_wrap,
+                        code_width=88,
+                        indent_guides=self.indent_guides,
+                        dedent=False,
+                    )
+                    yield ""
+                except Exception as error:
+                    yield Text.assemble(
+                        (f"\n{error}", "traceback.error"),
+                    )
+                else:
+                    yield (
+                        Columns(
+                            [
+                                syntax,
+                                *render_locals(frame),
+                            ],
+                            padding=1,
+                        )
+                        if frame.locals
+                        else syntax
+                    )
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from .console import Console
+
+    console = Console()
+    import sys
+
+    def bar(a: Any) -> None:  # 这是对亚洲语言支持的测试。面对模棱两可的想法，拒绝猜测的诱惑
+        one = 1
+        print(one / a)
+
+    def foo(a: Any) -> None:
+        _rich_traceback_guard = True
+        zed = {
+            "characters": {
+                "Paul Atreides",
+                "Vladimir Harkonnen",
+                "Thufir Hawat",
+                "Duncan Idaho",
+            },
+            "atomic_types": (None, False, True),
+        }
+        bar(a)
+
+    def error() -> None:
+
+        try:
+            try:
+                foo(0)
+            except:
+                slfkjsldkfj  # type: ignore[name-defined]
+        except:
+            console.print_exception(show_locals=True)
+
+    error()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/rich/tree.py b/venv/lib/python3.9/site-packages/pip/_vendor/rich/tree.py
new file mode 100644
index 0000000..afe8da1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/rich/tree.py
@@ -0,0 +1,251 @@
+from typing import Iterator, List, Optional, Tuple
+
+from ._loop import loop_first, loop_last
+from .console import Console, ConsoleOptions, RenderableType, RenderResult
+from .jupyter import JupyterMixin
+from .measure import Measurement
+from .segment import Segment
+from .style import Style, StyleStack, StyleType
+from .styled import Styled
+
+
+class Tree(JupyterMixin):
+    """A renderable for a tree structure.
+
+    Args:
+        label (RenderableType): The renderable or str for the tree label.
+        style (StyleType, optional): Style of this tree. Defaults to "tree".
+        guide_style (StyleType, optional): Style of the guide lines. Defaults to "tree.line".
+        expanded (bool, optional): Also display children. Defaults to True.
+        highlight (bool, optional): Highlight renderable (if str). Defaults to False.
+    """
+
+    def __init__(
+        self,
+        label: RenderableType,
+        *,
+        style: StyleType = "tree",
+        guide_style: StyleType = "tree.line",
+        expanded: bool = True,
+        highlight: bool = False,
+        hide_root: bool = False,
+    ) -> None:
+        self.label = label
+        self.style = style
+        self.guide_style = guide_style
+        self.children: List[Tree] = []
+        self.expanded = expanded
+        self.highlight = highlight
+        self.hide_root = hide_root
+
+    def add(
+        self,
+        label: RenderableType,
+        *,
+        style: Optional[StyleType] = None,
+        guide_style: Optional[StyleType] = None,
+        expanded: bool = True,
+        highlight: Optional[bool] = False,
+    ) -> "Tree":
+        """Add a child tree.
+
+        Args:
+            label (RenderableType): The renderable or str for the tree label.
+            style (StyleType, optional): Style of this tree. Defaults to "tree".
+            guide_style (StyleType, optional): Style of the guide lines. Defaults to "tree.line".
+            expanded (bool, optional): Also display children. Defaults to True.
+            highlight (Optional[bool], optional): Highlight renderable (if str). Defaults to False.
+
+        Returns:
+            Tree: A new child Tree, which may be further modified.
+        """
+        node = Tree(
+            label,
+            style=self.style if style is None else style,
+            guide_style=self.guide_style if guide_style is None else guide_style,
+            expanded=expanded,
+            highlight=self.highlight if highlight is None else highlight,
+        )
+        self.children.append(node)
+        return node
+
+    def __rich_console__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "RenderResult":
+
+        stack: List[Iterator[Tuple[bool, Tree]]] = []
+        pop = stack.pop
+        push = stack.append
+        new_line = Segment.line()
+
+        get_style = console.get_style
+        null_style = Style.null()
+        guide_style = get_style(self.guide_style, default="") or null_style
+        SPACE, CONTINUE, FORK, END = range(4)
+
+        ASCII_GUIDES = ("    ", "|   ", "+-- ", "`-- ")
+        TREE_GUIDES = [
+            ("    ", "│   ", "├── ", "└── "),
+            ("    ", "┃   ", "┣━━ ", "┗━━ "),
+            ("    ", "║   ", "╠══ ", "╚══ "),
+        ]
+        _Segment = Segment
+
+        def make_guide(index: int, style: Style) -> Segment:
+            """Make a Segment for a level of the guide lines."""
+            if options.ascii_only:
+                line = ASCII_GUIDES[index]
+            else:
+                guide = 1 if style.bold else (2 if style.underline2 else 0)
+                line = TREE_GUIDES[0 if options.legacy_windows else guide][index]
+            return _Segment(line, style)
+
+        levels: List[Segment] = [make_guide(CONTINUE, guide_style)]
+        push(iter(loop_last([self])))
+
+        guide_style_stack = StyleStack(get_style(self.guide_style))
+        style_stack = StyleStack(get_style(self.style))
+        remove_guide_styles = Style(bold=False, underline2=False)
+
+        depth = 0
+
+        while stack:
+            stack_node = pop()
+            try:
+                last, node = next(stack_node)
+            except StopIteration:
+                levels.pop()
+                if levels:
+                    guide_style = levels[-1].style or null_style
+                    levels[-1] = make_guide(FORK, guide_style)
+                    guide_style_stack.pop()
+                    style_stack.pop()
+                continue
+            push(stack_node)
+            if last:
+                levels[-1] = make_guide(END, levels[-1].style or null_style)
+
+            guide_style = guide_style_stack.current + get_style(node.guide_style)
+            style = style_stack.current + get_style(node.style)
+            prefix = levels[(2 if self.hide_root else 1) :]
+            renderable_lines = console.render_lines(
+                Styled(node.label, style),
+                options.update(
+                    width=options.max_width
+                    - sum(level.cell_length for level in prefix),
+                    highlight=self.highlight,
+                    height=None,
+                ),
+                pad=options.justify is not None,
+            )
+
+            if not (depth == 0 and self.hide_root):
+                for first, line in loop_first(renderable_lines):
+                    if prefix:
+                        yield from _Segment.apply_style(
+                            prefix,
+                            style.background_style,
+                            post_style=remove_guide_styles,
+                        )
+                    yield from line
+                    yield new_line
+                    if first and prefix:
+                        prefix[-1] = make_guide(
+                            SPACE if last else CONTINUE, prefix[-1].style or null_style
+                        )
+
+            if node.expanded and node.children:
+                levels[-1] = make_guide(
+                    SPACE if last else CONTINUE, levels[-1].style or null_style
+                )
+                levels.append(
+                    make_guide(END if len(node.children) == 1 else FORK, guide_style)
+                )
+                style_stack.push(get_style(node.style))
+                guide_style_stack.push(get_style(node.guide_style))
+                push(iter(loop_last(node.children)))
+                depth += 1
+
+    def __rich_measure__(
+        self, console: "Console", options: "ConsoleOptions"
+    ) -> "Measurement":
+        stack: List[Iterator[Tree]] = [iter([self])]
+        pop = stack.pop
+        push = stack.append
+        minimum = 0
+        maximum = 0
+        measure = Measurement.get
+        level = 0
+        while stack:
+            iter_tree = pop()
+            try:
+                tree = next(iter_tree)
+            except StopIteration:
+                level -= 1
+                continue
+            push(iter_tree)
+            min_measure, max_measure = measure(console, options, tree.label)
+            indent = level * 4
+            minimum = max(min_measure + indent, minimum)
+            maximum = max(max_measure + indent, maximum)
+            if tree.expanded and tree.children:
+                push(iter(tree.children))
+                level += 1
+        return Measurement(minimum, maximum)
+
+
+if __name__ == "__main__":  # pragma: no cover
+
+    from pip._vendor.rich.console import Group
+    from pip._vendor.rich.markdown import Markdown
+    from pip._vendor.rich.panel import Panel
+    from pip._vendor.rich.syntax import Syntax
+    from pip._vendor.rich.table import Table
+
+    table = Table(row_styles=["", "dim"])
+
+    table.add_column("Released", style="cyan", no_wrap=True)
+    table.add_column("Title", style="magenta")
+    table.add_column("Box Office", justify="right", style="green")
+
+    table.add_row("Dec 20, 2019", "Star Wars: The Rise of Skywalker", "$952,110,690")
+    table.add_row("May 25, 2018", "Solo: A Star Wars Story", "$393,151,347")
+    table.add_row("Dec 15, 2017", "Star Wars Ep. V111: The Last Jedi", "$1,332,539,889")
+    table.add_row("Dec 16, 2016", "Rogue One: A Star Wars Story", "$1,332,439,889")
+
+    code = """\
+class Segment(NamedTuple):
+    text: str = ""
+    style: Optional[Style] = None
+    is_control: bool = False
+"""
+    syntax = Syntax(code, "python", theme="monokai", line_numbers=True)
+
+    markdown = Markdown(
+        """\
+### example.md
+> Hello, World!
+>
+> Markdown _all_ the things
+"""
+    )
+
+    root = Tree("🌲 [b green]Rich Tree", highlight=True, hide_root=True)
+
+    node = root.add(":file_folder: Renderables", guide_style="red")
+    simple_node = node.add(":file_folder: [bold yellow]Atomic", guide_style="uu green")
+    simple_node.add(Group("📄 Syntax", syntax))
+    simple_node.add(Group("📄 Markdown", Panel(markdown, border_style="green")))
+
+    containers_node = node.add(
+        ":file_folder: [bold magenta]Containers", guide_style="bold magenta"
+    )
+    containers_node.expanded = True
+    panel = Panel.fit("Just a panel", border_style="red")
+    containers_node.add(Group("📄 Panels", panel))
+
+    containers_node.add(Group("📄 [b magenta]Table", table))
+
+    console = Console()
+
+    console.print(root)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/six.py b/venv/lib/python3.9/site-packages/pip/_vendor/six.py
new file mode 100644
index 0000000..4e15675
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/six.py
@@ -0,0 +1,998 @@
+# Copyright (c) 2010-2020 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.16.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+if PY34:
+    from importlib.util import spec_from_loader
+else:
+    spec_from_loader = None
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def find_spec(self, fullname, path, target=None):
+        if fullname in self.known_modules:
+            return spec_from_loader(fullname, self)
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+    def create_module(self, spec):
+        return self.load_module(spec.name)
+
+    def exec_module(self, module):
+        pass
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("collections_abc", "collections", "collections.abc" if sys.version_info >= (3, 3) else "collections"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("dbm_ndbm", "dbm", "dbm.ndbm"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread" if sys.version_info < (3, 9) else "_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    del io
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+        _assertNotRegex = "assertNotRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+        _assertNotRegex = "assertNotRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+    _assertNotRegex = "assertNotRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+def assertNotRegex(self, *args, **kwargs):
+    return getattr(self, _assertNotRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+""")
+
+
+if sys.version_info[:2] > (3,):
+    exec_("""def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    # This does exactly the same what the :func:`py3:functools.update_wrapper`
+    # function does on Python versions after 3.2. It sets the ``__wrapped__``
+    # attribute on ``wrapper`` object and it doesn't raise an error if any of
+    # the attributes mentioned in ``assigned`` and ``updated`` are missing on
+    # ``wrapped`` object.
+    def _update_wrapper(wrapper, wrapped,
+                        assigned=functools.WRAPPER_ASSIGNMENTS,
+                        updated=functools.WRAPPER_UPDATES):
+        for attr in assigned:
+            try:
+                value = getattr(wrapped, attr)
+            except AttributeError:
+                continue
+            else:
+                setattr(wrapper, attr, value)
+        for attr in updated:
+            getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
+        wrapper.__wrapped__ = wrapped
+        return wrapper
+    _update_wrapper.__doc__ = functools.update_wrapper.__doc__
+
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        return functools.partial(_update_wrapper, wrapped=wrapped,
+                                 assigned=assigned, updated=updated)
+    wraps.__doc__ = functools.wraps.__doc__
+
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+
+        def __new__(cls, name, this_bases, d):
+            if sys.version_info[:2] >= (3, 7):
+                # This version introduced PEP 560 that requires a bit
+                # of extra care (we mimic what is done by __build_class__).
+                resolved_bases = types.resolve_bases(bases)
+                if resolved_bases is not bases:
+                    d['__orig_bases__'] = bases
+            else:
+                resolved_bases = bases
+            return meta(name, resolved_bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        if hasattr(cls, '__qualname__'):
+            orig_vars['__qualname__'] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def ensure_binary(s, encoding='utf-8', errors='strict'):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, binary_type):
+        return s
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    # Optimization: Fast return for the common case.
+    if type(s) is str:
+        return s
+    if PY2 and isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    return s
+
+
+def ensure_text(s, encoding='utf-8', errors='strict'):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A class decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/__init__.py
new file mode 100644
index 0000000..ab3be3b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/__init__.py
@@ -0,0 +1,519 @@
+# Copyright 2016-2018 Julien Danjou
+# Copyright 2017 Elisey Zanko
+# Copyright 2016 Étienne Bersac
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import functools
+import sys
+import threading
+import time
+import typing as t
+import warnings
+from abc import ABC, abstractmethod
+from concurrent import futures
+from inspect import iscoroutinefunction
+
+# Import all built-in retry strategies for easier usage.
+from .retry import retry_base  # noqa
+from .retry import retry_all  # noqa
+from .retry import retry_always  # noqa
+from .retry import retry_any  # noqa
+from .retry import retry_if_exception  # noqa
+from .retry import retry_if_exception_type  # noqa
+from .retry import retry_if_exception_cause_type  # noqa
+from .retry import retry_if_not_exception_type  # noqa
+from .retry import retry_if_not_result  # noqa
+from .retry import retry_if_result  # noqa
+from .retry import retry_never  # noqa
+from .retry import retry_unless_exception_type  # noqa
+from .retry import retry_if_exception_message  # noqa
+from .retry import retry_if_not_exception_message  # noqa
+
+# Import all nap strategies for easier usage.
+from .nap import sleep  # noqa
+from .nap import sleep_using_event  # noqa
+
+# Import all built-in stop strategies for easier usage.
+from .stop import stop_after_attempt  # noqa
+from .stop import stop_after_delay  # noqa
+from .stop import stop_all  # noqa
+from .stop import stop_any  # noqa
+from .stop import stop_never  # noqa
+from .stop import stop_when_event_set  # noqa
+
+# Import all built-in wait strategies for easier usage.
+from .wait import wait_chain  # noqa
+from .wait import wait_combine  # noqa
+from .wait import wait_exponential  # noqa
+from .wait import wait_fixed  # noqa
+from .wait import wait_incrementing  # noqa
+from .wait import wait_none  # noqa
+from .wait import wait_random  # noqa
+from .wait import wait_random_exponential  # noqa
+from .wait import wait_random_exponential as wait_full_jitter  # noqa
+from .wait import wait_exponential_jitter  # noqa
+
+# Import all built-in before strategies for easier usage.
+from .before import before_log  # noqa
+from .before import before_nothing  # noqa
+
+# Import all built-in after strategies for easier usage.
+from .after import after_log  # noqa
+from .after import after_nothing  # noqa
+
+# Import all built-in after strategies for easier usage.
+from .before_sleep import before_sleep_log  # noqa
+from .before_sleep import before_sleep_nothing  # noqa
+
+# Replace a conditional import with a hard-coded None so that pip does
+# not attempt to use tornado even if it is present in the environment.
+# If tornado is non-None, tenacity will attempt to execute some code
+# that is sensitive to the version of tornado, which could break pip
+# if an old version is found.
+tornado = None  # type: ignore
+
+if t.TYPE_CHECKING:
+    import types
+
+    from .wait import wait_base
+    from .stop import stop_base
+
+
+WrappedFn = t.TypeVar("WrappedFn", bound=t.Callable)
+_RetValT = t.TypeVar("_RetValT")
+
+
+@t.overload
+def retry(fn: WrappedFn) -> WrappedFn:
+    pass
+
+
+@t.overload
+def retry(*dargs: t.Any, **dkw: t.Any) -> t.Callable[[WrappedFn], WrappedFn]:  # noqa
+    pass
+
+
+def retry(*dargs: t.Any, **dkw: t.Any) -> t.Union[WrappedFn, t.Callable[[WrappedFn], WrappedFn]]:  # noqa
+    """Wrap a function with a new `Retrying` object.
+
+    :param dargs: positional arguments passed to Retrying object
+    :param dkw: keyword arguments passed to the Retrying object
+    """
+    # support both @retry and @retry() as valid syntax
+    if len(dargs) == 1 and callable(dargs[0]):
+        return retry()(dargs[0])
+    else:
+
+        def wrap(f: WrappedFn) -> WrappedFn:
+            if isinstance(f, retry_base):
+                warnings.warn(
+                    f"Got retry_base instance ({f.__class__.__name__}) as callable argument, "
+                    f"this will probably hang indefinitely (did you mean retry={f.__class__.__name__}(...)?)"
+                )
+            if iscoroutinefunction(f):
+                r: "BaseRetrying" = AsyncRetrying(*dargs, **dkw)
+            elif tornado and hasattr(tornado.gen, "is_coroutine_function") and tornado.gen.is_coroutine_function(f):
+                r = TornadoRetrying(*dargs, **dkw)
+            else:
+                r = Retrying(*dargs, **dkw)
+
+            return r.wraps(f)
+
+        return wrap
+
+
+class TryAgain(Exception):
+    """Always retry the executed function when raised."""
+
+
+NO_RESULT = object()
+
+
+class DoAttempt:
+    pass
+
+
+class DoSleep(float):
+    pass
+
+
+class BaseAction:
+    """Base class for representing actions to take by retry object.
+
+    Concrete implementations must define:
+    - __init__: to initialize all necessary fields
+    - REPR_FIELDS: class variable specifying attributes to include in repr(self)
+    - NAME: for identification in retry object methods and callbacks
+    """
+
+    REPR_FIELDS: t.Sequence[str] = ()
+    NAME: t.Optional[str] = None
+
+    def __repr__(self) -> str:
+        state_str = ", ".join(f"{field}={getattr(self, field)!r}" for field in self.REPR_FIELDS)
+        return f"{self.__class__.__name__}({state_str})"
+
+    def __str__(self) -> str:
+        return repr(self)
+
+
+class RetryAction(BaseAction):
+    REPR_FIELDS = ("sleep",)
+    NAME = "retry"
+
+    def __init__(self, sleep: t.SupportsFloat) -> None:
+        self.sleep = float(sleep)
+
+
+_unset = object()
+
+
+def _first_set(first: t.Union[t.Any, object], second: t.Any) -> t.Any:
+    return second if first is _unset else first
+
+
+class RetryError(Exception):
+    """Encapsulates the last attempt instance right before giving up."""
+
+    def __init__(self, last_attempt: "Future") -> None:
+        self.last_attempt = last_attempt
+        super().__init__(last_attempt)
+
+    def reraise(self) -> "t.NoReturn":
+        if self.last_attempt.failed:
+            raise self.last_attempt.result()
+        raise self
+
+    def __str__(self) -> str:
+        return f"{self.__class__.__name__}[{self.last_attempt}]"
+
+
+class AttemptManager:
+    """Manage attempt context."""
+
+    def __init__(self, retry_state: "RetryCallState"):
+        self.retry_state = retry_state
+
+    def __enter__(self) -> None:
+        pass
+
+    def __exit__(
+        self,
+        exc_type: t.Optional[t.Type[BaseException]],
+        exc_value: t.Optional[BaseException],
+        traceback: t.Optional["types.TracebackType"],
+    ) -> t.Optional[bool]:
+        if isinstance(exc_value, BaseException):
+            self.retry_state.set_exception((exc_type, exc_value, traceback))
+            return True  # Swallow exception.
+        else:
+            # We don't have the result, actually.
+            self.retry_state.set_result(None)
+            return None
+
+
+class BaseRetrying(ABC):
+    def __init__(
+        self,
+        sleep: t.Callable[[t.Union[int, float]], None] = sleep,
+        stop: "stop_base" = stop_never,
+        wait: "wait_base" = wait_none(),
+        retry: retry_base = retry_if_exception_type(),
+        before: t.Callable[["RetryCallState"], None] = before_nothing,
+        after: t.Callable[["RetryCallState"], None] = after_nothing,
+        before_sleep: t.Optional[t.Callable[["RetryCallState"], None]] = None,
+        reraise: bool = False,
+        retry_error_cls: t.Type[RetryError] = RetryError,
+        retry_error_callback: t.Optional[t.Callable[["RetryCallState"], t.Any]] = None,
+    ):
+        self.sleep = sleep
+        self.stop = stop
+        self.wait = wait
+        self.retry = retry
+        self.before = before
+        self.after = after
+        self.before_sleep = before_sleep
+        self.reraise = reraise
+        self._local = threading.local()
+        self.retry_error_cls = retry_error_cls
+        self.retry_error_callback = retry_error_callback
+
+    def copy(
+        self,
+        sleep: t.Union[t.Callable[[t.Union[int, float]], None], object] = _unset,
+        stop: t.Union["stop_base", object] = _unset,
+        wait: t.Union["wait_base", object] = _unset,
+        retry: t.Union[retry_base, object] = _unset,
+        before: t.Union[t.Callable[["RetryCallState"], None], object] = _unset,
+        after: t.Union[t.Callable[["RetryCallState"], None], object] = _unset,
+        before_sleep: t.Union[t.Optional[t.Callable[["RetryCallState"], None]], object] = _unset,
+        reraise: t.Union[bool, object] = _unset,
+        retry_error_cls: t.Union[t.Type[RetryError], object] = _unset,
+        retry_error_callback: t.Union[t.Optional[t.Callable[["RetryCallState"], t.Any]], object] = _unset,
+    ) -> "BaseRetrying":
+        """Copy this object with some parameters changed if needed."""
+        return self.__class__(
+            sleep=_first_set(sleep, self.sleep),
+            stop=_first_set(stop, self.stop),
+            wait=_first_set(wait, self.wait),
+            retry=_first_set(retry, self.retry),
+            before=_first_set(before, self.before),
+            after=_first_set(after, self.after),
+            before_sleep=_first_set(before_sleep, self.before_sleep),
+            reraise=_first_set(reraise, self.reraise),
+            retry_error_cls=_first_set(retry_error_cls, self.retry_error_cls),
+            retry_error_callback=_first_set(retry_error_callback, self.retry_error_callback),
+        )
+
+    def __repr__(self) -> str:
+        return (
+            f"<{self.__class__.__name__} object at 0x{id(self):x} ("
+            f"stop={self.stop}, "
+            f"wait={self.wait}, "
+            f"sleep={self.sleep}, "
+            f"retry={self.retry}, "
+            f"before={self.before}, "
+            f"after={self.after})>"
+        )
+
+    @property
+    def statistics(self) -> t.Dict[str, t.Any]:
+        """Return a dictionary of runtime statistics.
+
+        This dictionary will be empty when the controller has never been
+        ran. When it is running or has ran previously it should have (but
+        may not) have useful and/or informational keys and values when
+        running is underway and/or completed.
+
+        .. warning:: The keys in this dictionary **should** be some what
+                     stable (not changing), but there existence **may**
+                     change between major releases as new statistics are
+                     gathered or removed so before accessing keys ensure that
+                     they actually exist and handle when they do not.
+
+        .. note:: The values in this dictionary are local to the thread
+                  running call (so if multiple threads share the same retrying
+                  object - either directly or indirectly) they will each have
+                  there own view of statistics they have collected (in the
+                  future we may provide a way to aggregate the various
+                  statistics from each thread).
+        """
+        try:
+            return self._local.statistics
+        except AttributeError:
+            self._local.statistics = {}
+            return self._local.statistics
+
+    def wraps(self, f: WrappedFn) -> WrappedFn:
+        """Wrap a function for retrying.
+
+        :param f: A function to wraps for retrying.
+        """
+
+        @functools.wraps(f)
+        def wrapped_f(*args: t.Any, **kw: t.Any) -> t.Any:
+            return self(f, *args, **kw)
+
+        def retry_with(*args: t.Any, **kwargs: t.Any) -> WrappedFn:
+            return self.copy(*args, **kwargs).wraps(f)
+
+        wrapped_f.retry = self
+        wrapped_f.retry_with = retry_with
+
+        return wrapped_f
+
+    def begin(self) -> None:
+        self.statistics.clear()
+        self.statistics["start_time"] = time.monotonic()
+        self.statistics["attempt_number"] = 1
+        self.statistics["idle_for"] = 0
+
+    def iter(self, retry_state: "RetryCallState") -> t.Union[DoAttempt, DoSleep, t.Any]:  # noqa
+        fut = retry_state.outcome
+        if fut is None:
+            if self.before is not None:
+                self.before(retry_state)
+            return DoAttempt()
+
+        is_explicit_retry = retry_state.outcome.failed and isinstance(retry_state.outcome.exception(), TryAgain)
+        if not (is_explicit_retry or self.retry(retry_state=retry_state)):
+            return fut.result()
+
+        if self.after is not None:
+            self.after(retry_state)
+
+        self.statistics["delay_since_first_attempt"] = retry_state.seconds_since_start
+        if self.stop(retry_state=retry_state):
+            if self.retry_error_callback:
+                return self.retry_error_callback(retry_state)
+            retry_exc = self.retry_error_cls(fut)
+            if self.reraise:
+                raise retry_exc.reraise()
+            raise retry_exc from fut.exception()
+
+        if self.wait:
+            sleep = self.wait(retry_state=retry_state)
+        else:
+            sleep = 0.0
+        retry_state.next_action = RetryAction(sleep)
+        retry_state.idle_for += sleep
+        self.statistics["idle_for"] += sleep
+        self.statistics["attempt_number"] += 1
+
+        if self.before_sleep is not None:
+            self.before_sleep(retry_state)
+
+        return DoSleep(sleep)
+
+    def __iter__(self) -> t.Generator[AttemptManager, None, None]:
+        self.begin()
+
+        retry_state = RetryCallState(self, fn=None, args=(), kwargs={})
+        while True:
+            do = self.iter(retry_state=retry_state)
+            if isinstance(do, DoAttempt):
+                yield AttemptManager(retry_state=retry_state)
+            elif isinstance(do, DoSleep):
+                retry_state.prepare_for_next_attempt()
+                self.sleep(do)
+            else:
+                break
+
+    @abstractmethod
+    def __call__(self, fn: t.Callable[..., _RetValT], *args: t.Any, **kwargs: t.Any) -> _RetValT:
+        pass
+
+
+class Retrying(BaseRetrying):
+    """Retrying controller."""
+
+    def __call__(self, fn: t.Callable[..., _RetValT], *args: t.Any, **kwargs: t.Any) -> _RetValT:
+        self.begin()
+
+        retry_state = RetryCallState(retry_object=self, fn=fn, args=args, kwargs=kwargs)
+        while True:
+            do = self.iter(retry_state=retry_state)
+            if isinstance(do, DoAttempt):
+                try:
+                    result = fn(*args, **kwargs)
+                except BaseException:  # noqa: B902
+                    retry_state.set_exception(sys.exc_info())
+                else:
+                    retry_state.set_result(result)
+            elif isinstance(do, DoSleep):
+                retry_state.prepare_for_next_attempt()
+                self.sleep(do)
+            else:
+                return do
+
+
+class Future(futures.Future):
+    """Encapsulates a (future or past) attempted call to a target function."""
+
+    def __init__(self, attempt_number: int) -> None:
+        super().__init__()
+        self.attempt_number = attempt_number
+
+    @property
+    def failed(self) -> bool:
+        """Return whether a exception is being held in this future."""
+        return self.exception() is not None
+
+    @classmethod
+    def construct(cls, attempt_number: int, value: t.Any, has_exception: bool) -> "Future":
+        """Construct a new Future object."""
+        fut = cls(attempt_number)
+        if has_exception:
+            fut.set_exception(value)
+        else:
+            fut.set_result(value)
+        return fut
+
+
+class RetryCallState:
+    """State related to a single call wrapped with Retrying."""
+
+    def __init__(
+        self,
+        retry_object: BaseRetrying,
+        fn: t.Optional[WrappedFn],
+        args: t.Any,
+        kwargs: t.Any,
+    ) -> None:
+        #: Retry call start timestamp
+        self.start_time = time.monotonic()
+        #: Retry manager object
+        self.retry_object = retry_object
+        #: Function wrapped by this retry call
+        self.fn = fn
+        #: Arguments of the function wrapped by this retry call
+        self.args = args
+        #: Keyword arguments of the function wrapped by this retry call
+        self.kwargs = kwargs
+
+        #: The number of the current attempt
+        self.attempt_number: int = 1
+        #: Last outcome (result or exception) produced by the function
+        self.outcome: t.Optional[Future] = None
+        #: Timestamp of the last outcome
+        self.outcome_timestamp: t.Optional[float] = None
+        #: Time spent sleeping in retries
+        self.idle_for: float = 0.0
+        #: Next action as decided by the retry manager
+        self.next_action: t.Optional[RetryAction] = None
+
+    @property
+    def seconds_since_start(self) -> t.Optional[float]:
+        if self.outcome_timestamp is None:
+            return None
+        return self.outcome_timestamp - self.start_time
+
+    def prepare_for_next_attempt(self) -> None:
+        self.outcome = None
+        self.outcome_timestamp = None
+        self.attempt_number += 1
+        self.next_action = None
+
+    def set_result(self, val: t.Any) -> None:
+        ts = time.monotonic()
+        fut = Future(self.attempt_number)
+        fut.set_result(val)
+        self.outcome, self.outcome_timestamp = fut, ts
+
+    def set_exception(self, exc_info: t.Tuple[t.Type[BaseException], BaseException, "types.TracebackType"]) -> None:
+        ts = time.monotonic()
+        fut = Future(self.attempt_number)
+        fut.set_exception(exc_info[1])
+        self.outcome, self.outcome_timestamp = fut, ts
+
+    def __repr__(self):
+        if self.outcome is None:
+            result = "none yet"
+        elif self.outcome.failed:
+            exception = self.outcome.exception()
+            result = f"failed ({exception.__class__.__name__} {exception})"
+        else:
+            result = f"returned {self.outcome.result()}"
+
+        slept = float(round(self.idle_for, 2))
+        clsname = self.__class__.__name__
+        return f"<{clsname} {id(self)}: attempt #{self.attempt_number}; slept for {slept}; last result: {result}>"
+
+
+from pip._vendor.tenacity._asyncio import AsyncRetrying  # noqa:E402,I100
+
+if tornado:
+    from pip._vendor.tenacity.tornadoweb import TornadoRetrying
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/__pycache__/wait.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/__pycache__/wait.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_asyncio.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_asyncio.py
new file mode 100644
index 0000000..0f32b5f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_asyncio.py
@@ -0,0 +1,92 @@
+# Copyright 2016 Étienne Bersac
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import functools
+import sys
+import typing
+from asyncio import sleep
+
+from pip._vendor.tenacity import AttemptManager
+from pip._vendor.tenacity import BaseRetrying
+from pip._vendor.tenacity import DoAttempt
+from pip._vendor.tenacity import DoSleep
+from pip._vendor.tenacity import RetryCallState
+
+WrappedFn = typing.TypeVar("WrappedFn", bound=typing.Callable)
+_RetValT = typing.TypeVar("_RetValT")
+
+
+class AsyncRetrying(BaseRetrying):
+    def __init__(self, sleep: typing.Callable[[float], typing.Awaitable] = sleep, **kwargs: typing.Any) -> None:
+        super().__init__(**kwargs)
+        self.sleep = sleep
+
+    async def __call__(  # type: ignore  # Change signature from supertype
+        self,
+        fn: typing.Callable[..., typing.Awaitable[_RetValT]],
+        *args: typing.Any,
+        **kwargs: typing.Any,
+    ) -> _RetValT:
+        self.begin()
+
+        retry_state = RetryCallState(retry_object=self, fn=fn, args=args, kwargs=kwargs)
+        while True:
+            do = self.iter(retry_state=retry_state)
+            if isinstance(do, DoAttempt):
+                try:
+                    result = await fn(*args, **kwargs)
+                except BaseException:  # noqa: B902
+                    retry_state.set_exception(sys.exc_info())
+                else:
+                    retry_state.set_result(result)
+            elif isinstance(do, DoSleep):
+                retry_state.prepare_for_next_attempt()
+                await self.sleep(do)
+            else:
+                return do
+
+    def __aiter__(self) -> "AsyncRetrying":
+        self.begin()
+        self._retry_state = RetryCallState(self, fn=None, args=(), kwargs={})
+        return self
+
+    async def __anext__(self) -> typing.Union[AttemptManager, typing.Any]:
+        while True:
+            do = self.iter(retry_state=self._retry_state)
+            if do is None:
+                raise StopAsyncIteration
+            elif isinstance(do, DoAttempt):
+                return AttemptManager(retry_state=self._retry_state)
+            elif isinstance(do, DoSleep):
+                self._retry_state.prepare_for_next_attempt()
+                await self.sleep(do)
+            else:
+                return do
+
+    def wraps(self, fn: WrappedFn) -> WrappedFn:
+        fn = super().wraps(fn)
+        # Ensure wrapper is recognized as a coroutine function.
+
+        @functools.wraps(fn)
+        async def async_wrapped(*args: typing.Any, **kwargs: typing.Any) -> typing.Any:
+            return await fn(*args, **kwargs)
+
+        # Preserve attributes
+        async_wrapped.retry = fn.retry
+        async_wrapped.retry_with = fn.retry_with
+
+        return async_wrapped
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_utils.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_utils.py
new file mode 100644
index 0000000..d5c4c9d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/_utils.py
@@ -0,0 +1,68 @@
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import typing
+
+
+# sys.maxsize:
+# An integer giving the maximum value a variable of type Py_ssize_t can take.
+MAX_WAIT = sys.maxsize / 2
+
+
+def find_ordinal(pos_num: int) -> str:
+    # See: https://en.wikipedia.org/wiki/English_numerals#Ordinal_numbers
+    if pos_num == 0:
+        return "th"
+    elif pos_num == 1:
+        return "st"
+    elif pos_num == 2:
+        return "nd"
+    elif pos_num == 3:
+        return "rd"
+    elif 4 <= pos_num <= 20:
+        return "th"
+    else:
+        return find_ordinal(pos_num % 10)
+
+
+def to_ordinal(pos_num: int) -> str:
+    return f"{pos_num}{find_ordinal(pos_num)}"
+
+
+def get_callback_name(cb: typing.Callable[..., typing.Any]) -> str:
+    """Get a callback fully-qualified name.
+
+    If no name can be produced ``repr(cb)`` is called and returned.
+    """
+    segments = []
+    try:
+        segments.append(cb.__qualname__)
+    except AttributeError:
+        try:
+            segments.append(cb.__name__)
+        except AttributeError:
+            pass
+    if not segments:
+        return repr(cb)
+    else:
+        try:
+            # When running under sphinx it appears this can be none?
+            if cb.__module__:
+                segments.insert(0, cb.__module__)
+        except AttributeError:
+            pass
+        return ".".join(segments)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/after.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/after.py
new file mode 100644
index 0000000..c056700
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/after.py
@@ -0,0 +1,46 @@
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import typing
+
+from pip._vendor.tenacity import _utils
+
+if typing.TYPE_CHECKING:
+    import logging
+
+    from pip._vendor.tenacity import RetryCallState
+
+
+def after_nothing(retry_state: "RetryCallState") -> None:
+    """After call strategy that does nothing."""
+
+
+def after_log(
+    logger: "logging.Logger",
+    log_level: int,
+    sec_format: str = "%0.3f",
+) -> typing.Callable[["RetryCallState"], None]:
+    """After call strategy that logs to some logger the finished attempt."""
+
+    def log_it(retry_state: "RetryCallState") -> None:
+        logger.log(
+            log_level,
+            f"Finished call to '{_utils.get_callback_name(retry_state.fn)}' "
+            f"after {sec_format % retry_state.seconds_since_start}(s), "
+            f"this was the {_utils.to_ordinal(retry_state.attempt_number)} time calling it.",
+        )
+
+    return log_it
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before.py
new file mode 100644
index 0000000..a72c2c5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before.py
@@ -0,0 +1,41 @@
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import typing
+
+from pip._vendor.tenacity import _utils
+
+if typing.TYPE_CHECKING:
+    import logging
+
+    from pip._vendor.tenacity import RetryCallState
+
+
+def before_nothing(retry_state: "RetryCallState") -> None:
+    """Before call strategy that does nothing."""
+
+
+def before_log(logger: "logging.Logger", log_level: int) -> typing.Callable[["RetryCallState"], None]:
+    """Before call strategy that logs to some logger the attempt."""
+
+    def log_it(retry_state: "RetryCallState") -> None:
+        logger.log(
+            log_level,
+            f"Starting call to '{_utils.get_callback_name(retry_state.fn)}', "
+            f"this is the {_utils.to_ordinal(retry_state.attempt_number)} time calling it.",
+        )
+
+    return log_it
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before_sleep.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before_sleep.py
new file mode 100644
index 0000000..b35564f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/before_sleep.py
@@ -0,0 +1,58 @@
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import typing
+
+from pip._vendor.tenacity import _utils
+
+if typing.TYPE_CHECKING:
+    import logging
+
+    from pip._vendor.tenacity import RetryCallState
+
+
+def before_sleep_nothing(retry_state: "RetryCallState") -> None:
+    """Before call strategy that does nothing."""
+
+
+def before_sleep_log(
+    logger: "logging.Logger",
+    log_level: int,
+    exc_info: bool = False,
+) -> typing.Callable[["RetryCallState"], None]:
+    """Before call strategy that logs to some logger the attempt."""
+
+    def log_it(retry_state: "RetryCallState") -> None:
+        if retry_state.outcome.failed:
+            ex = retry_state.outcome.exception()
+            verb, value = "raised", f"{ex.__class__.__name__}: {ex}"
+
+            if exc_info:
+                local_exc_info = retry_state.outcome.exception()
+            else:
+                local_exc_info = False
+        else:
+            verb, value = "returned", retry_state.outcome.result()
+            local_exc_info = False  # exc_info does not apply when no exception
+
+        logger.log(
+            log_level,
+            f"Retrying {_utils.get_callback_name(retry_state.fn)} "
+            f"in {retry_state.next_action.sleep} seconds as it {verb} {value}.",
+            exc_info=local_exc_info,
+        )
+
+    return log_it
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/nap.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/nap.py
new file mode 100644
index 0000000..72aa5bf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/nap.py
@@ -0,0 +1,43 @@
+# Copyright 2016 Étienne Bersac
+# Copyright 2016 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import time
+import typing
+
+if typing.TYPE_CHECKING:
+    import threading
+
+
+def sleep(seconds: float) -> None:
+    """
+    Sleep strategy that delays execution for a given number of seconds.
+
+    This is the default strategy, and may be mocked out for unit testing.
+    """
+    time.sleep(seconds)
+
+
+class sleep_using_event:
+    """Sleep strategy that waits on an event to be set."""
+
+    def __init__(self, event: "threading.Event") -> None:
+        self.event = event
+
+    def __call__(self, timeout: typing.Optional[float]) -> None:
+        # NOTE(harlowja): this may *not* actually wait for timeout
+        # seconds if the event is set (ie this may eject out early).
+        self.event.wait(timeout=timeout)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/retry.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/retry.py
new file mode 100644
index 0000000..9ebeb62
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/retry.py
@@ -0,0 +1,240 @@
+# Copyright 2016–2021 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import abc
+import re
+import typing
+
+if typing.TYPE_CHECKING:
+    from pip._vendor.tenacity import RetryCallState
+
+
+class retry_base(abc.ABC):
+    """Abstract base class for retry strategies."""
+
+    @abc.abstractmethod
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        pass
+
+    def __and__(self, other: "retry_base") -> "retry_all":
+        return retry_all(self, other)
+
+    def __or__(self, other: "retry_base") -> "retry_any":
+        return retry_any(self, other)
+
+
+class _retry_never(retry_base):
+    """Retry strategy that never rejects any result."""
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return False
+
+
+retry_never = _retry_never()
+
+
+class _retry_always(retry_base):
+    """Retry strategy that always rejects any result."""
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return True
+
+
+retry_always = _retry_always()
+
+
+class retry_if_exception(retry_base):
+    """Retry strategy that retries if an exception verifies a predicate."""
+
+    def __init__(self, predicate: typing.Callable[[BaseException], bool]) -> None:
+        self.predicate = predicate
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        if retry_state.outcome.failed:
+            return self.predicate(retry_state.outcome.exception())
+        else:
+            return False
+
+
+class retry_if_exception_type(retry_if_exception):
+    """Retries if an exception has been raised of one or more types."""
+
+    def __init__(
+        self,
+        exception_types: typing.Union[
+            typing.Type[BaseException],
+            typing.Tuple[typing.Type[BaseException], ...],
+        ] = Exception,
+    ) -> None:
+        self.exception_types = exception_types
+        super().__init__(lambda e: isinstance(e, exception_types))
+
+
+class retry_if_not_exception_type(retry_if_exception):
+    """Retries except an exception has been raised of one or more types."""
+
+    def __init__(
+        self,
+        exception_types: typing.Union[
+            typing.Type[BaseException],
+            typing.Tuple[typing.Type[BaseException], ...],
+        ] = Exception,
+    ) -> None:
+        self.exception_types = exception_types
+        super().__init__(lambda e: not isinstance(e, exception_types))
+
+
+class retry_unless_exception_type(retry_if_exception):
+    """Retries until an exception is raised of one or more types."""
+
+    def __init__(
+        self,
+        exception_types: typing.Union[
+            typing.Type[BaseException],
+            typing.Tuple[typing.Type[BaseException], ...],
+        ] = Exception,
+    ) -> None:
+        self.exception_types = exception_types
+        super().__init__(lambda e: not isinstance(e, exception_types))
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        # always retry if no exception was raised
+        if not retry_state.outcome.failed:
+            return True
+        return self.predicate(retry_state.outcome.exception())
+
+
+class retry_if_exception_cause_type(retry_base):
+    """Retries if any of the causes of the raised exception is of one or more types.
+
+    The check on the type of the cause of the exception is done recursively (until finding
+    an exception in the chain that has no `__cause__`)
+    """
+
+    def __init__(
+        self,
+        exception_types: typing.Union[
+            typing.Type[BaseException],
+            typing.Tuple[typing.Type[BaseException], ...],
+        ] = Exception,
+    ) -> None:
+        self.exception_cause_types = exception_types
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        if retry_state.outcome.failed:
+            exc = retry_state.outcome.exception()
+            while exc is not None:
+                if isinstance(exc.__cause__, self.exception_cause_types):
+                    return True
+                exc = exc.__cause__
+
+        return False
+
+
+class retry_if_result(retry_base):
+    """Retries if the result verifies a predicate."""
+
+    def __init__(self, predicate: typing.Callable[[typing.Any], bool]) -> None:
+        self.predicate = predicate
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        if not retry_state.outcome.failed:
+            return self.predicate(retry_state.outcome.result())
+        else:
+            return False
+
+
+class retry_if_not_result(retry_base):
+    """Retries if the result refutes a predicate."""
+
+    def __init__(self, predicate: typing.Callable[[typing.Any], bool]) -> None:
+        self.predicate = predicate
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        if not retry_state.outcome.failed:
+            return not self.predicate(retry_state.outcome.result())
+        else:
+            return False
+
+
+class retry_if_exception_message(retry_if_exception):
+    """Retries if an exception message equals or matches."""
+
+    def __init__(
+        self,
+        message: typing.Optional[str] = None,
+        match: typing.Optional[str] = None,
+    ) -> None:
+        if message and match:
+            raise TypeError(f"{self.__class__.__name__}() takes either 'message' or 'match', not both")
+
+        # set predicate
+        if message:
+
+            def message_fnc(exception: BaseException) -> bool:
+                return message == str(exception)
+
+            predicate = message_fnc
+        elif match:
+            prog = re.compile(match)
+
+            def match_fnc(exception: BaseException) -> bool:
+                return bool(prog.match(str(exception)))
+
+            predicate = match_fnc
+        else:
+            raise TypeError(f"{self.__class__.__name__}() missing 1 required argument 'message' or 'match'")
+
+        super().__init__(predicate)
+
+
+class retry_if_not_exception_message(retry_if_exception_message):
+    """Retries until an exception message equals or matches."""
+
+    def __init__(
+        self,
+        message: typing.Optional[str] = None,
+        match: typing.Optional[str] = None,
+    ) -> None:
+        super().__init__(message, match)
+        # invert predicate
+        if_predicate = self.predicate
+        self.predicate = lambda *args_, **kwargs_: not if_predicate(*args_, **kwargs_)
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        if not retry_state.outcome.failed:
+            return True
+        return self.predicate(retry_state.outcome.exception())
+
+
+class retry_any(retry_base):
+    """Retries if any of the retries condition is valid."""
+
+    def __init__(self, *retries: retry_base) -> None:
+        self.retries = retries
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return any(r(retry_state) for r in self.retries)
+
+
+class retry_all(retry_base):
+    """Retries if all the retries condition are valid."""
+
+    def __init__(self, *retries: retry_base) -> None:
+        self.retries = retries
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return all(r(retry_state) for r in self.retries)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/stop.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/stop.py
new file mode 100644
index 0000000..faaae9a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/stop.py
@@ -0,0 +1,96 @@
+# Copyright 2016–2021 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import abc
+import typing
+
+if typing.TYPE_CHECKING:
+    import threading
+
+    from pip._vendor.tenacity import RetryCallState
+
+
+class stop_base(abc.ABC):
+    """Abstract base class for stop strategies."""
+
+    @abc.abstractmethod
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        pass
+
+    def __and__(self, other: "stop_base") -> "stop_all":
+        return stop_all(self, other)
+
+    def __or__(self, other: "stop_base") -> "stop_any":
+        return stop_any(self, other)
+
+
+class stop_any(stop_base):
+    """Stop if any of the stop condition is valid."""
+
+    def __init__(self, *stops: stop_base) -> None:
+        self.stops = stops
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return any(x(retry_state) for x in self.stops)
+
+
+class stop_all(stop_base):
+    """Stop if all the stop conditions are valid."""
+
+    def __init__(self, *stops: stop_base) -> None:
+        self.stops = stops
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return all(x(retry_state) for x in self.stops)
+
+
+class _stop_never(stop_base):
+    """Never stop."""
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return False
+
+
+stop_never = _stop_never()
+
+
+class stop_when_event_set(stop_base):
+    """Stop when the given event is set."""
+
+    def __init__(self, event: "threading.Event") -> None:
+        self.event = event
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return self.event.is_set()
+
+
+class stop_after_attempt(stop_base):
+    """Stop when the previous attempt >= max_attempt."""
+
+    def __init__(self, max_attempt_number: int) -> None:
+        self.max_attempt_number = max_attempt_number
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return retry_state.attempt_number >= self.max_attempt_number
+
+
+class stop_after_delay(stop_base):
+    """Stop when the time from the first attempt >= limit."""
+
+    def __init__(self, max_delay: float) -> None:
+        self.max_delay = max_delay
+
+    def __call__(self, retry_state: "RetryCallState") -> bool:
+        return retry_state.seconds_since_start >= self.max_delay
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/tornadoweb.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/tornadoweb.py
new file mode 100644
index 0000000..8f7731a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/tornadoweb.py
@@ -0,0 +1,59 @@
+# Copyright 2017 Elisey Zanko
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import sys
+import typing
+
+from pip._vendor.tenacity import BaseRetrying
+from pip._vendor.tenacity import DoAttempt
+from pip._vendor.tenacity import DoSleep
+from pip._vendor.tenacity import RetryCallState
+
+from tornado import gen
+
+if typing.TYPE_CHECKING:
+    from tornado.concurrent import Future
+
+_RetValT = typing.TypeVar("_RetValT")
+
+
+class TornadoRetrying(BaseRetrying):
+    def __init__(self, sleep: "typing.Callable[[float], Future[None]]" = gen.sleep, **kwargs: typing.Any) -> None:
+        super().__init__(**kwargs)
+        self.sleep = sleep
+
+    @gen.coroutine
+    def __call__(  # type: ignore  # Change signature from supertype
+        self,
+        fn: "typing.Callable[..., typing.Union[typing.Generator[typing.Any, typing.Any, _RetValT], Future[_RetValT]]]",
+        *args: typing.Any,
+        **kwargs: typing.Any,
+    ) -> "typing.Generator[typing.Any, typing.Any, _RetValT]":
+        self.begin()
+
+        retry_state = RetryCallState(retry_object=self, fn=fn, args=args, kwargs=kwargs)
+        while True:
+            do = self.iter(retry_state=retry_state)
+            if isinstance(do, DoAttempt):
+                try:
+                    result = yield fn(*args, **kwargs)
+                except BaseException:  # noqa: B902
+                    retry_state.set_exception(sys.exc_info())
+                else:
+                    retry_state.set_result(result)
+            elif isinstance(do, DoSleep):
+                retry_state.prepare_for_next_attempt()
+                yield self.sleep(do)
+            else:
+                raise gen.Return(do)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/wait.py b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/wait.py
new file mode 100644
index 0000000..8fdfc8f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tenacity/wait.py
@@ -0,0 +1,232 @@
+# Copyright 2016–2021 Julien Danjou
+# Copyright 2016 Joshua Harlow
+# Copyright 2013-2014 Ray Holder
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import abc
+import random
+import typing
+from datetime import timedelta
+
+from pip._vendor.tenacity import _utils
+
+if typing.TYPE_CHECKING:
+    from pip._vendor.tenacity import RetryCallState
+
+wait_unit_type = typing.Union[int, float, timedelta]
+
+
+def to_seconds(wait_unit: wait_unit_type) -> float:
+    return float(wait_unit.total_seconds() if isinstance(wait_unit, timedelta) else wait_unit)
+
+
+class wait_base(abc.ABC):
+    """Abstract base class for wait strategies."""
+
+    @abc.abstractmethod
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        pass
+
+    def __add__(self, other: "wait_base") -> "wait_combine":
+        return wait_combine(self, other)
+
+    def __radd__(self, other: "wait_base") -> typing.Union["wait_combine", "wait_base"]:
+        # make it possible to use multiple waits with the built-in sum function
+        if other == 0:
+            return self
+        return self.__add__(other)
+
+
+class wait_fixed(wait_base):
+    """Wait strategy that waits a fixed amount of time between each retry."""
+
+    def __init__(self, wait: wait_unit_type) -> None:
+        self.wait_fixed = to_seconds(wait)
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        return self.wait_fixed
+
+
+class wait_none(wait_fixed):
+    """Wait strategy that doesn't wait at all before retrying."""
+
+    def __init__(self) -> None:
+        super().__init__(0)
+
+
+class wait_random(wait_base):
+    """Wait strategy that waits a random amount of time between min/max."""
+
+    def __init__(self, min: wait_unit_type = 0, max: wait_unit_type = 1) -> None:  # noqa
+        self.wait_random_min = to_seconds(min)
+        self.wait_random_max = to_seconds(max)
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        return self.wait_random_min + (random.random() * (self.wait_random_max - self.wait_random_min))
+
+
+class wait_combine(wait_base):
+    """Combine several waiting strategies."""
+
+    def __init__(self, *strategies: wait_base) -> None:
+        self.wait_funcs = strategies
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        return sum(x(retry_state=retry_state) for x in self.wait_funcs)
+
+
+class wait_chain(wait_base):
+    """Chain two or more waiting strategies.
+
+    If all strategies are exhausted, the very last strategy is used
+    thereafter.
+
+    For example::
+
+        @retry(wait=wait_chain(*[wait_fixed(1) for i in range(3)] +
+                               [wait_fixed(2) for j in range(5)] +
+                               [wait_fixed(5) for k in range(4)))
+        def wait_chained():
+            print("Wait 1s for 3 attempts, 2s for 5 attempts and 5s
+                   thereafter.")
+    """
+
+    def __init__(self, *strategies: wait_base) -> None:
+        self.strategies = strategies
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        wait_func_no = min(max(retry_state.attempt_number, 1), len(self.strategies))
+        wait_func = self.strategies[wait_func_no - 1]
+        return wait_func(retry_state=retry_state)
+
+
+class wait_incrementing(wait_base):
+    """Wait an incremental amount of time after each attempt.
+
+    Starting at a starting value and incrementing by a value for each attempt
+    (and restricting the upper limit to some maximum value).
+    """
+
+    def __init__(
+        self,
+        start: wait_unit_type = 0,
+        increment: wait_unit_type = 100,
+        max: wait_unit_type = _utils.MAX_WAIT,  # noqa
+    ) -> None:
+        self.start = to_seconds(start)
+        self.increment = to_seconds(increment)
+        self.max = to_seconds(max)
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        result = self.start + (self.increment * (retry_state.attempt_number - 1))
+        return max(0, min(result, self.max))
+
+
+class wait_exponential(wait_base):
+    """Wait strategy that applies exponential backoff.
+
+    It allows for a customized multiplier and an ability to restrict the
+    upper and lower limits to some maximum and minimum value.
+
+    The intervals are fixed (i.e. there is no jitter), so this strategy is
+    suitable for balancing retries against latency when a required resource is
+    unavailable for an unknown duration, but *not* suitable for resolving
+    contention between multiple processes for a shared resource. Use
+    wait_random_exponential for the latter case.
+    """
+
+    def __init__(
+        self,
+        multiplier: typing.Union[int, float] = 1,
+        max: wait_unit_type = _utils.MAX_WAIT,  # noqa
+        exp_base: typing.Union[int, float] = 2,
+        min: wait_unit_type = 0,  # noqa
+    ) -> None:
+        self.multiplier = multiplier
+        self.min = to_seconds(min)
+        self.max = to_seconds(max)
+        self.exp_base = exp_base
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        try:
+            exp = self.exp_base ** (retry_state.attempt_number - 1)
+            result = self.multiplier * exp
+        except OverflowError:
+            return self.max
+        return max(max(0, self.min), min(result, self.max))
+
+
+class wait_random_exponential(wait_exponential):
+    """Random wait with exponentially widening window.
+
+    An exponential backoff strategy used to mediate contention between multiple
+    uncoordinated processes for a shared resource in distributed systems. This
+    is the sense in which "exponential backoff" is meant in e.g. Ethernet
+    networking, and corresponds to the "Full Jitter" algorithm described in
+    this blog post:
+
+    https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/
+
+    Each retry occurs at a random time in a geometrically expanding interval.
+    It allows for a custom multiplier and an ability to restrict the upper
+    limit of the random interval to some maximum value.
+
+    Example::
+
+        wait_random_exponential(multiplier=0.5,  # initial window 0.5s
+                                max=60)          # max 60s timeout
+
+    When waiting for an unavailable resource to become available again, as
+    opposed to trying to resolve contention for a shared resource, the
+    wait_exponential strategy (which uses a fixed interval) may be preferable.
+
+    """
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        high = super().__call__(retry_state=retry_state)
+        return random.uniform(0, high)
+
+
+class wait_exponential_jitter(wait_base):
+    """Wait strategy that applies exponential backoff and jitter.
+
+    It allows for a customized initial wait, maximum wait and jitter.
+
+    This implements the strategy described here:
+    https://cloud.google.com/storage/docs/retry-strategy
+
+    The wait time is min(initial * (2**n + random.uniform(0, jitter)), maximum)
+    where n is the retry count.
+    """
+
+    def __init__(
+        self,
+        initial: float = 1,
+        max: float = _utils.MAX_WAIT,  # noqa
+        exp_base: float = 2,
+        jitter: float = 1,
+    ) -> None:
+        self.initial = initial
+        self.max = max
+        self.exp_base = exp_base
+        self.jitter = jitter
+
+    def __call__(self, retry_state: "RetryCallState") -> float:
+        jitter = random.uniform(0, self.jitter)
+        try:
+            exp = self.exp_base ** (retry_state.attempt_number - 1)
+            result = self.initial * exp + jitter
+        except OverflowError:
+            result = self.max
+        return max(0, min(result, self.max))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__init__.py
new file mode 100644
index 0000000..4c6ec97
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__init__.py
@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2021 Taneli Hukkinen
+# Licensed to PSF under a Contributor Agreement.
+
+__all__ = ("loads", "load", "TOMLDecodeError")
+__version__ = "2.0.1"  # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT
+
+from ._parser import TOMLDecodeError, load, loads
+
+# Pretend this exception was created here.
+TOMLDecodeError.__module__ = __name__
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..a89edc4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_parser.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_parser.cpython-39.pyc
new file mode 100644
index 0000000..16abc8f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_parser.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_re.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_re.cpython-39.pyc
new file mode 100644
index 0000000..fcf029e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_re.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_types.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_types.cpython-39.pyc
new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/__pycache__/_types.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_parser.py b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_parser.py
new file mode 100644
index 0000000..f1bb0aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_parser.py
@@ -0,0 +1,691 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2021 Taneli Hukkinen
+# Licensed to PSF under a Contributor Agreement.
+
+from __future__ import annotations
+
+from collections.abc import Iterable
+import string
+from types import MappingProxyType
+from typing import Any, BinaryIO, NamedTuple
+
+from ._re import (
+    RE_DATETIME,
+    RE_LOCALTIME,
+    RE_NUMBER,
+    match_to_datetime,
+    match_to_localtime,
+    match_to_number,
+)
+from ._types import Key, ParseFloat, Pos
+
+ASCII_CTRL = frozenset(chr(i) for i in range(32)) | frozenset(chr(127))
+
+# Neither of these sets include quotation mark or backslash. They are
+# currently handled as separate cases in the parser functions.
+ILLEGAL_BASIC_STR_CHARS = ASCII_CTRL - frozenset("\t")
+ILLEGAL_MULTILINE_BASIC_STR_CHARS = ASCII_CTRL - frozenset("\t\n")
+
+ILLEGAL_LITERAL_STR_CHARS = ILLEGAL_BASIC_STR_CHARS
+ILLEGAL_MULTILINE_LITERAL_STR_CHARS = ILLEGAL_MULTILINE_BASIC_STR_CHARS
+
+ILLEGAL_COMMENT_CHARS = ILLEGAL_BASIC_STR_CHARS
+
+TOML_WS = frozenset(" \t")
+TOML_WS_AND_NEWLINE = TOML_WS | frozenset("\n")
+BARE_KEY_CHARS = frozenset(string.ascii_letters + string.digits + "-_")
+KEY_INITIAL_CHARS = BARE_KEY_CHARS | frozenset("\"'")
+HEXDIGIT_CHARS = frozenset(string.hexdigits)
+
+BASIC_STR_ESCAPE_REPLACEMENTS = MappingProxyType(
+    {
+        "\\b": "\u0008",  # backspace
+        "\\t": "\u0009",  # tab
+        "\\n": "\u000A",  # linefeed
+        "\\f": "\u000C",  # form feed
+        "\\r": "\u000D",  # carriage return
+        '\\"': "\u0022",  # quote
+        "\\\\": "\u005C",  # backslash
+    }
+)
+
+
+class TOMLDecodeError(ValueError):
+    """An error raised if a document is not valid TOML."""
+
+
+def load(__fp: BinaryIO, *, parse_float: ParseFloat = float) -> dict[str, Any]:
+    """Parse TOML from a binary file object."""
+    b = __fp.read()
+    try:
+        s = b.decode()
+    except AttributeError:
+        raise TypeError(
+            "File must be opened in binary mode, e.g. use `open('foo.toml', 'rb')`"
+        ) from None
+    return loads(s, parse_float=parse_float)
+
+
+def loads(__s: str, *, parse_float: ParseFloat = float) -> dict[str, Any]:  # noqa: C901
+    """Parse TOML from a string."""
+
+    # The spec allows converting "\r\n" to "\n", even in string
+    # literals. Let's do so to simplify parsing.
+    src = __s.replace("\r\n", "\n")
+    pos = 0
+    out = Output(NestedDict(), Flags())
+    header: Key = ()
+    parse_float = make_safe_parse_float(parse_float)
+
+    # Parse one statement at a time
+    # (typically means one line in TOML source)
+    while True:
+        # 1. Skip line leading whitespace
+        pos = skip_chars(src, pos, TOML_WS)
+
+        # 2. Parse rules. Expect one of the following:
+        #    - end of file
+        #    - end of line
+        #    - comment
+        #    - key/value pair
+        #    - append dict to list (and move to its namespace)
+        #    - create dict (and move to its namespace)
+        # Skip trailing whitespace when applicable.
+        try:
+            char = src[pos]
+        except IndexError:
+            break
+        if char == "\n":
+            pos += 1
+            continue
+        if char in KEY_INITIAL_CHARS:
+            pos = key_value_rule(src, pos, out, header, parse_float)
+            pos = skip_chars(src, pos, TOML_WS)
+        elif char == "[":
+            try:
+                second_char: str | None = src[pos + 1]
+            except IndexError:
+                second_char = None
+            out.flags.finalize_pending()
+            if second_char == "[":
+                pos, header = create_list_rule(src, pos, out)
+            else:
+                pos, header = create_dict_rule(src, pos, out)
+            pos = skip_chars(src, pos, TOML_WS)
+        elif char != "#":
+            raise suffixed_err(src, pos, "Invalid statement")
+
+        # 3. Skip comment
+        pos = skip_comment(src, pos)
+
+        # 4. Expect end of line or end of file
+        try:
+            char = src[pos]
+        except IndexError:
+            break
+        if char != "\n":
+            raise suffixed_err(
+                src, pos, "Expected newline or end of document after a statement"
+            )
+        pos += 1
+
+    return out.data.dict
+
+
+class Flags:
+    """Flags that map to parsed keys/namespaces."""
+
+    # Marks an immutable namespace (inline array or inline table).
+    FROZEN = 0
+    # Marks a nest that has been explicitly created and can no longer
+    # be opened using the "[table]" syntax.
+    EXPLICIT_NEST = 1
+
+    def __init__(self) -> None:
+        self._flags: dict[str, dict] = {}
+        self._pending_flags: set[tuple[Key, int]] = set()
+
+    def add_pending(self, key: Key, flag: int) -> None:
+        self._pending_flags.add((key, flag))
+
+    def finalize_pending(self) -> None:
+        for key, flag in self._pending_flags:
+            self.set(key, flag, recursive=False)
+        self._pending_flags.clear()
+
+    def unset_all(self, key: Key) -> None:
+        cont = self._flags
+        for k in key[:-1]:
+            if k not in cont:
+                return
+            cont = cont[k]["nested"]
+        cont.pop(key[-1], None)
+
+    def set(self, key: Key, flag: int, *, recursive: bool) -> None:  # noqa: A003
+        cont = self._flags
+        key_parent, key_stem = key[:-1], key[-1]
+        for k in key_parent:
+            if k not in cont:
+                cont[k] = {"flags": set(), "recursive_flags": set(), "nested": {}}
+            cont = cont[k]["nested"]
+        if key_stem not in cont:
+            cont[key_stem] = {"flags": set(), "recursive_flags": set(), "nested": {}}
+        cont[key_stem]["recursive_flags" if recursive else "flags"].add(flag)
+
+    def is_(self, key: Key, flag: int) -> bool:
+        if not key:
+            return False  # document root has no flags
+        cont = self._flags
+        for k in key[:-1]:
+            if k not in cont:
+                return False
+            inner_cont = cont[k]
+            if flag in inner_cont["recursive_flags"]:
+                return True
+            cont = inner_cont["nested"]
+        key_stem = key[-1]
+        if key_stem in cont:
+            cont = cont[key_stem]
+            return flag in cont["flags"] or flag in cont["recursive_flags"]
+        return False
+
+
+class NestedDict:
+    def __init__(self) -> None:
+        # The parsed content of the TOML document
+        self.dict: dict[str, Any] = {}
+
+    def get_or_create_nest(
+        self,
+        key: Key,
+        *,
+        access_lists: bool = True,
+    ) -> dict:
+        cont: Any = self.dict
+        for k in key:
+            if k not in cont:
+                cont[k] = {}
+            cont = cont[k]
+            if access_lists and isinstance(cont, list):
+                cont = cont[-1]
+            if not isinstance(cont, dict):
+                raise KeyError("There is no nest behind this key")
+        return cont
+
+    def append_nest_to_list(self, key: Key) -> None:
+        cont = self.get_or_create_nest(key[:-1])
+        last_key = key[-1]
+        if last_key in cont:
+            list_ = cont[last_key]
+            if not isinstance(list_, list):
+                raise KeyError("An object other than list found behind this key")
+            list_.append({})
+        else:
+            cont[last_key] = [{}]
+
+
+class Output(NamedTuple):
+    data: NestedDict
+    flags: Flags
+
+
+def skip_chars(src: str, pos: Pos, chars: Iterable[str]) -> Pos:
+    try:
+        while src[pos] in chars:
+            pos += 1
+    except IndexError:
+        pass
+    return pos
+
+
+def skip_until(
+    src: str,
+    pos: Pos,
+    expect: str,
+    *,
+    error_on: frozenset[str],
+    error_on_eof: bool,
+) -> Pos:
+    try:
+        new_pos = src.index(expect, pos)
+    except ValueError:
+        new_pos = len(src)
+        if error_on_eof:
+            raise suffixed_err(src, new_pos, f"Expected {expect!r}") from None
+
+    if not error_on.isdisjoint(src[pos:new_pos]):
+        while src[pos] not in error_on:
+            pos += 1
+        raise suffixed_err(src, pos, f"Found invalid character {src[pos]!r}")
+    return new_pos
+
+
+def skip_comment(src: str, pos: Pos) -> Pos:
+    try:
+        char: str | None = src[pos]
+    except IndexError:
+        char = None
+    if char == "#":
+        return skip_until(
+            src, pos + 1, "\n", error_on=ILLEGAL_COMMENT_CHARS, error_on_eof=False
+        )
+    return pos
+
+
+def skip_comments_and_array_ws(src: str, pos: Pos) -> Pos:
+    while True:
+        pos_before_skip = pos
+        pos = skip_chars(src, pos, TOML_WS_AND_NEWLINE)
+        pos = skip_comment(src, pos)
+        if pos == pos_before_skip:
+            return pos
+
+
+def create_dict_rule(src: str, pos: Pos, out: Output) -> tuple[Pos, Key]:
+    pos += 1  # Skip "["
+    pos = skip_chars(src, pos, TOML_WS)
+    pos, key = parse_key(src, pos)
+
+    if out.flags.is_(key, Flags.EXPLICIT_NEST) or out.flags.is_(key, Flags.FROZEN):
+        raise suffixed_err(src, pos, f"Cannot declare {key} twice")
+    out.flags.set(key, Flags.EXPLICIT_NEST, recursive=False)
+    try:
+        out.data.get_or_create_nest(key)
+    except KeyError:
+        raise suffixed_err(src, pos, "Cannot overwrite a value") from None
+
+    if not src.startswith("]", pos):
+        raise suffixed_err(src, pos, "Expected ']' at the end of a table declaration")
+    return pos + 1, key
+
+
+def create_list_rule(src: str, pos: Pos, out: Output) -> tuple[Pos, Key]:
+    pos += 2  # Skip "[["
+    pos = skip_chars(src, pos, TOML_WS)
+    pos, key = parse_key(src, pos)
+
+    if out.flags.is_(key, Flags.FROZEN):
+        raise suffixed_err(src, pos, f"Cannot mutate immutable namespace {key}")
+    # Free the namespace now that it points to another empty list item...
+    out.flags.unset_all(key)
+    # ...but this key precisely is still prohibited from table declaration
+    out.flags.set(key, Flags.EXPLICIT_NEST, recursive=False)
+    try:
+        out.data.append_nest_to_list(key)
+    except KeyError:
+        raise suffixed_err(src, pos, "Cannot overwrite a value") from None
+
+    if not src.startswith("]]", pos):
+        raise suffixed_err(src, pos, "Expected ']]' at the end of an array declaration")
+    return pos + 2, key
+
+
+def key_value_rule(
+    src: str, pos: Pos, out: Output, header: Key, parse_float: ParseFloat
+) -> Pos:
+    pos, key, value = parse_key_value_pair(src, pos, parse_float)
+    key_parent, key_stem = key[:-1], key[-1]
+    abs_key_parent = header + key_parent
+
+    relative_path_cont_keys = (header + key[:i] for i in range(1, len(key)))
+    for cont_key in relative_path_cont_keys:
+        # Check that dotted key syntax does not redefine an existing table
+        if out.flags.is_(cont_key, Flags.EXPLICIT_NEST):
+            raise suffixed_err(src, pos, f"Cannot redefine namespace {cont_key}")
+        # Containers in the relative path can't be opened with the table syntax or
+        # dotted key/value syntax in following table sections.
+        out.flags.add_pending(cont_key, Flags.EXPLICIT_NEST)
+
+    if out.flags.is_(abs_key_parent, Flags.FROZEN):
+        raise suffixed_err(
+            src, pos, f"Cannot mutate immutable namespace {abs_key_parent}"
+        )
+
+    try:
+        nest = out.data.get_or_create_nest(abs_key_parent)
+    except KeyError:
+        raise suffixed_err(src, pos, "Cannot overwrite a value") from None
+    if key_stem in nest:
+        raise suffixed_err(src, pos, "Cannot overwrite a value")
+    # Mark inline table and array namespaces recursively immutable
+    if isinstance(value, (dict, list)):
+        out.flags.set(header + key, Flags.FROZEN, recursive=True)
+    nest[key_stem] = value
+    return pos
+
+
+def parse_key_value_pair(
+    src: str, pos: Pos, parse_float: ParseFloat
+) -> tuple[Pos, Key, Any]:
+    pos, key = parse_key(src, pos)
+    try:
+        char: str | None = src[pos]
+    except IndexError:
+        char = None
+    if char != "=":
+        raise suffixed_err(src, pos, "Expected '=' after a key in a key/value pair")
+    pos += 1
+    pos = skip_chars(src, pos, TOML_WS)
+    pos, value = parse_value(src, pos, parse_float)
+    return pos, key, value
+
+
+def parse_key(src: str, pos: Pos) -> tuple[Pos, Key]:
+    pos, key_part = parse_key_part(src, pos)
+    key: Key = (key_part,)
+    pos = skip_chars(src, pos, TOML_WS)
+    while True:
+        try:
+            char: str | None = src[pos]
+        except IndexError:
+            char = None
+        if char != ".":
+            return pos, key
+        pos += 1
+        pos = skip_chars(src, pos, TOML_WS)
+        pos, key_part = parse_key_part(src, pos)
+        key += (key_part,)
+        pos = skip_chars(src, pos, TOML_WS)
+
+
+def parse_key_part(src: str, pos: Pos) -> tuple[Pos, str]:
+    try:
+        char: str | None = src[pos]
+    except IndexError:
+        char = None
+    if char in BARE_KEY_CHARS:
+        start_pos = pos
+        pos = skip_chars(src, pos, BARE_KEY_CHARS)
+        return pos, src[start_pos:pos]
+    if char == "'":
+        return parse_literal_str(src, pos)
+    if char == '"':
+        return parse_one_line_basic_str(src, pos)
+    raise suffixed_err(src, pos, "Invalid initial character for a key part")
+
+
+def parse_one_line_basic_str(src: str, pos: Pos) -> tuple[Pos, str]:
+    pos += 1
+    return parse_basic_str(src, pos, multiline=False)
+
+
+def parse_array(src: str, pos: Pos, parse_float: ParseFloat) -> tuple[Pos, list]:
+    pos += 1
+    array: list = []
+
+    pos = skip_comments_and_array_ws(src, pos)
+    if src.startswith("]", pos):
+        return pos + 1, array
+    while True:
+        pos, val = parse_value(src, pos, parse_float)
+        array.append(val)
+        pos = skip_comments_and_array_ws(src, pos)
+
+        c = src[pos : pos + 1]
+        if c == "]":
+            return pos + 1, array
+        if c != ",":
+            raise suffixed_err(src, pos, "Unclosed array")
+        pos += 1
+
+        pos = skip_comments_and_array_ws(src, pos)
+        if src.startswith("]", pos):
+            return pos + 1, array
+
+
+def parse_inline_table(src: str, pos: Pos, parse_float: ParseFloat) -> tuple[Pos, dict]:
+    pos += 1
+    nested_dict = NestedDict()
+    flags = Flags()
+
+    pos = skip_chars(src, pos, TOML_WS)
+    if src.startswith("}", pos):
+        return pos + 1, nested_dict.dict
+    while True:
+        pos, key, value = parse_key_value_pair(src, pos, parse_float)
+        key_parent, key_stem = key[:-1], key[-1]
+        if flags.is_(key, Flags.FROZEN):
+            raise suffixed_err(src, pos, f"Cannot mutate immutable namespace {key}")
+        try:
+            nest = nested_dict.get_or_create_nest(key_parent, access_lists=False)
+        except KeyError:
+            raise suffixed_err(src, pos, "Cannot overwrite a value") from None
+        if key_stem in nest:
+            raise suffixed_err(src, pos, f"Duplicate inline table key {key_stem!r}")
+        nest[key_stem] = value
+        pos = skip_chars(src, pos, TOML_WS)
+        c = src[pos : pos + 1]
+        if c == "}":
+            return pos + 1, nested_dict.dict
+        if c != ",":
+            raise suffixed_err(src, pos, "Unclosed inline table")
+        if isinstance(value, (dict, list)):
+            flags.set(key, Flags.FROZEN, recursive=True)
+        pos += 1
+        pos = skip_chars(src, pos, TOML_WS)
+
+
+def parse_basic_str_escape(
+    src: str, pos: Pos, *, multiline: bool = False
+) -> tuple[Pos, str]:
+    escape_id = src[pos : pos + 2]
+    pos += 2
+    if multiline and escape_id in {"\\ ", "\\\t", "\\\n"}:
+        # Skip whitespace until next non-whitespace character or end of
+        # the doc. Error if non-whitespace is found before newline.
+        if escape_id != "\\\n":
+            pos = skip_chars(src, pos, TOML_WS)
+            try:
+                char = src[pos]
+            except IndexError:
+                return pos, ""
+            if char != "\n":
+                raise suffixed_err(src, pos, "Unescaped '\\' in a string")
+            pos += 1
+        pos = skip_chars(src, pos, TOML_WS_AND_NEWLINE)
+        return pos, ""
+    if escape_id == "\\u":
+        return parse_hex_char(src, pos, 4)
+    if escape_id == "\\U":
+        return parse_hex_char(src, pos, 8)
+    try:
+        return pos, BASIC_STR_ESCAPE_REPLACEMENTS[escape_id]
+    except KeyError:
+        raise suffixed_err(src, pos, "Unescaped '\\' in a string") from None
+
+
+def parse_basic_str_escape_multiline(src: str, pos: Pos) -> tuple[Pos, str]:
+    return parse_basic_str_escape(src, pos, multiline=True)
+
+
+def parse_hex_char(src: str, pos: Pos, hex_len: int) -> tuple[Pos, str]:
+    hex_str = src[pos : pos + hex_len]
+    if len(hex_str) != hex_len or not HEXDIGIT_CHARS.issuperset(hex_str):
+        raise suffixed_err(src, pos, "Invalid hex value")
+    pos += hex_len
+    hex_int = int(hex_str, 16)
+    if not is_unicode_scalar_value(hex_int):
+        raise suffixed_err(src, pos, "Escaped character is not a Unicode scalar value")
+    return pos, chr(hex_int)
+
+
+def parse_literal_str(src: str, pos: Pos) -> tuple[Pos, str]:
+    pos += 1  # Skip starting apostrophe
+    start_pos = pos
+    pos = skip_until(
+        src, pos, "'", error_on=ILLEGAL_LITERAL_STR_CHARS, error_on_eof=True
+    )
+    return pos + 1, src[start_pos:pos]  # Skip ending apostrophe
+
+
+def parse_multiline_str(src: str, pos: Pos, *, literal: bool) -> tuple[Pos, str]:
+    pos += 3
+    if src.startswith("\n", pos):
+        pos += 1
+
+    if literal:
+        delim = "'"
+        end_pos = skip_until(
+            src,
+            pos,
+            "'''",
+            error_on=ILLEGAL_MULTILINE_LITERAL_STR_CHARS,
+            error_on_eof=True,
+        )
+        result = src[pos:end_pos]
+        pos = end_pos + 3
+    else:
+        delim = '"'
+        pos, result = parse_basic_str(src, pos, multiline=True)
+
+    # Add at maximum two extra apostrophes/quotes if the end sequence
+    # is 4 or 5 chars long instead of just 3.
+    if not src.startswith(delim, pos):
+        return pos, result
+    pos += 1
+    if not src.startswith(delim, pos):
+        return pos, result + delim
+    pos += 1
+    return pos, result + (delim * 2)
+
+
+def parse_basic_str(src: str, pos: Pos, *, multiline: bool) -> tuple[Pos, str]:
+    if multiline:
+        error_on = ILLEGAL_MULTILINE_BASIC_STR_CHARS
+        parse_escapes = parse_basic_str_escape_multiline
+    else:
+        error_on = ILLEGAL_BASIC_STR_CHARS
+        parse_escapes = parse_basic_str_escape
+    result = ""
+    start_pos = pos
+    while True:
+        try:
+            char = src[pos]
+        except IndexError:
+            raise suffixed_err(src, pos, "Unterminated string") from None
+        if char == '"':
+            if not multiline:
+                return pos + 1, result + src[start_pos:pos]
+            if src.startswith('"""', pos):
+                return pos + 3, result + src[start_pos:pos]
+            pos += 1
+            continue
+        if char == "\\":
+            result += src[start_pos:pos]
+            pos, parsed_escape = parse_escapes(src, pos)
+            result += parsed_escape
+            start_pos = pos
+            continue
+        if char in error_on:
+            raise suffixed_err(src, pos, f"Illegal character {char!r}")
+        pos += 1
+
+
+def parse_value(  # noqa: C901
+    src: str, pos: Pos, parse_float: ParseFloat
+) -> tuple[Pos, Any]:
+    try:
+        char: str | None = src[pos]
+    except IndexError:
+        char = None
+
+    # IMPORTANT: order conditions based on speed of checking and likelihood
+
+    # Basic strings
+    if char == '"':
+        if src.startswith('"""', pos):
+            return parse_multiline_str(src, pos, literal=False)
+        return parse_one_line_basic_str(src, pos)
+
+    # Literal strings
+    if char == "'":
+        if src.startswith("'''", pos):
+            return parse_multiline_str(src, pos, literal=True)
+        return parse_literal_str(src, pos)
+
+    # Booleans
+    if char == "t":
+        if src.startswith("true", pos):
+            return pos + 4, True
+    if char == "f":
+        if src.startswith("false", pos):
+            return pos + 5, False
+
+    # Arrays
+    if char == "[":
+        return parse_array(src, pos, parse_float)
+
+    # Inline tables
+    if char == "{":
+        return parse_inline_table(src, pos, parse_float)
+
+    # Dates and times
+    datetime_match = RE_DATETIME.match(src, pos)
+    if datetime_match:
+        try:
+            datetime_obj = match_to_datetime(datetime_match)
+        except ValueError as e:
+            raise suffixed_err(src, pos, "Invalid date or datetime") from e
+        return datetime_match.end(), datetime_obj
+    localtime_match = RE_LOCALTIME.match(src, pos)
+    if localtime_match:
+        return localtime_match.end(), match_to_localtime(localtime_match)
+
+    # Integers and "normal" floats.
+    # The regex will greedily match any type starting with a decimal
+    # char, so needs to be located after handling of dates and times.
+    number_match = RE_NUMBER.match(src, pos)
+    if number_match:
+        return number_match.end(), match_to_number(number_match, parse_float)
+
+    # Special floats
+    first_three = src[pos : pos + 3]
+    if first_three in {"inf", "nan"}:
+        return pos + 3, parse_float(first_three)
+    first_four = src[pos : pos + 4]
+    if first_four in {"-inf", "+inf", "-nan", "+nan"}:
+        return pos + 4, parse_float(first_four)
+
+    raise suffixed_err(src, pos, "Invalid value")
+
+
+def suffixed_err(src: str, pos: Pos, msg: str) -> TOMLDecodeError:
+    """Return a `TOMLDecodeError` where error message is suffixed with
+    coordinates in source."""
+
+    def coord_repr(src: str, pos: Pos) -> str:
+        if pos >= len(src):
+            return "end of document"
+        line = src.count("\n", 0, pos) + 1
+        if line == 1:
+            column = pos + 1
+        else:
+            column = pos - src.rindex("\n", 0, pos)
+        return f"line {line}, column {column}"
+
+    return TOMLDecodeError(f"{msg} (at {coord_repr(src, pos)})")
+
+
+def is_unicode_scalar_value(codepoint: int) -> bool:
+    return (0 <= codepoint <= 55295) or (57344 <= codepoint <= 1114111)
+
+
+def make_safe_parse_float(parse_float: ParseFloat) -> ParseFloat:
+    """A decorator to make `parse_float` safe.
+
+    `parse_float` must not return dicts or lists, because these types
+    would be mixed with parsed TOML tables and arrays, thus confusing
+    the parser. The returned decorated callable raises `ValueError`
+    instead of returning illegal types.
+    """
+    # The default `float` callable never returns illegal types. Optimize it.
+    if parse_float is float:  # type: ignore[comparison-overlap]
+        return float
+
+    def safe_parse_float(float_str: str) -> Any:
+        float_value = parse_float(float_str)
+        if isinstance(float_value, (dict, list)):
+            raise ValueError("parse_float must not return dicts or lists")
+        return float_value
+
+    return safe_parse_float
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_re.py b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_re.py
new file mode 100644
index 0000000..994bb74
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_re.py
@@ -0,0 +1,107 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2021 Taneli Hukkinen
+# Licensed to PSF under a Contributor Agreement.
+
+from __future__ import annotations
+
+from datetime import date, datetime, time, timedelta, timezone, tzinfo
+from functools import lru_cache
+import re
+from typing import Any
+
+from ._types import ParseFloat
+
+# E.g.
+# - 00:32:00.999999
+# - 00:32:00
+_TIME_RE_STR = r"([01][0-9]|2[0-3]):([0-5][0-9]):([0-5][0-9])(?:\.([0-9]{1,6})[0-9]*)?"
+
+RE_NUMBER = re.compile(
+    r"""
+0
+(?:
+    x[0-9A-Fa-f](?:_?[0-9A-Fa-f])*   # hex
+    |
+    b[01](?:_?[01])*                 # bin
+    |
+    o[0-7](?:_?[0-7])*               # oct
+)
+|
+[+-]?(?:0|[1-9](?:_?[0-9])*)         # dec, integer part
+(?P<floatpart>
+    (?:\.[0-9](?:_?[0-9])*)?         # optional fractional part
+    (?:[eE][+-]?[0-9](?:_?[0-9])*)?  # optional exponent part
+)
+""",
+    flags=re.VERBOSE,
+)
+RE_LOCALTIME = re.compile(_TIME_RE_STR)
+RE_DATETIME = re.compile(
+    rf"""
+([0-9]{{4}})-(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])  # date, e.g. 1988-10-27
+(?:
+    [Tt ]
+    {_TIME_RE_STR}
+    (?:([Zz])|([+-])([01][0-9]|2[0-3]):([0-5][0-9]))?  # optional time offset
+)?
+""",
+    flags=re.VERBOSE,
+)
+
+
+def match_to_datetime(match: re.Match) -> datetime | date:
+    """Convert a `RE_DATETIME` match to `datetime.datetime` or `datetime.date`.
+
+    Raises ValueError if the match does not correspond to a valid date
+    or datetime.
+    """
+    (
+        year_str,
+        month_str,
+        day_str,
+        hour_str,
+        minute_str,
+        sec_str,
+        micros_str,
+        zulu_time,
+        offset_sign_str,
+        offset_hour_str,
+        offset_minute_str,
+    ) = match.groups()
+    year, month, day = int(year_str), int(month_str), int(day_str)
+    if hour_str is None:
+        return date(year, month, day)
+    hour, minute, sec = int(hour_str), int(minute_str), int(sec_str)
+    micros = int(micros_str.ljust(6, "0")) if micros_str else 0
+    if offset_sign_str:
+        tz: tzinfo | None = cached_tz(
+            offset_hour_str, offset_minute_str, offset_sign_str
+        )
+    elif zulu_time:
+        tz = timezone.utc
+    else:  # local date-time
+        tz = None
+    return datetime(year, month, day, hour, minute, sec, micros, tzinfo=tz)
+
+
+@lru_cache(maxsize=None)
+def cached_tz(hour_str: str, minute_str: str, sign_str: str) -> timezone:
+    sign = 1 if sign_str == "+" else -1
+    return timezone(
+        timedelta(
+            hours=sign * int(hour_str),
+            minutes=sign * int(minute_str),
+        )
+    )
+
+
+def match_to_localtime(match: re.Match) -> time:
+    hour_str, minute_str, sec_str, micros_str = match.groups()
+    micros = int(micros_str.ljust(6, "0")) if micros_str else 0
+    return time(int(hour_str), int(minute_str), int(sec_str), micros)
+
+
+def match_to_number(match: re.Match, parse_float: ParseFloat) -> Any:
+    if match.group("floatpart"):
+        return parse_float(match.group())
+    return int(match.group(), 0)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_types.py b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_types.py
new file mode 100644
index 0000000..d949412
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/tomli/_types.py
@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: MIT
+# SPDX-FileCopyrightText: 2021 Taneli Hukkinen
+# Licensed to PSF under a Contributor Agreement.
+
+from typing import Any, Callable, Tuple
+
+# Type annotations
+ParseFloat = Callable[[str], Any]
+Key = Tuple[str, ...]
+Pos = int
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/typing_extensions.py b/venv/lib/python3.9/site-packages/pip/_vendor/typing_extensions.py
new file mode 100644
index 0000000..34199c2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/typing_extensions.py
@@ -0,0 +1,2209 @@
+import abc
+import collections
+import collections.abc
+import functools
+import operator
+import sys
+import types as _types
+import typing
+
+
+__all__ = [
+    # Super-special typing primitives.
+    'Any',
+    'ClassVar',
+    'Concatenate',
+    'Final',
+    'LiteralString',
+    'ParamSpec',
+    'ParamSpecArgs',
+    'ParamSpecKwargs',
+    'Self',
+    'Type',
+    'TypeVar',
+    'TypeVarTuple',
+    'Unpack',
+
+    # ABCs (from collections.abc).
+    'Awaitable',
+    'AsyncIterator',
+    'AsyncIterable',
+    'Coroutine',
+    'AsyncGenerator',
+    'AsyncContextManager',
+    'ChainMap',
+
+    # Concrete collection types.
+    'ContextManager',
+    'Counter',
+    'Deque',
+    'DefaultDict',
+    'NamedTuple',
+    'OrderedDict',
+    'TypedDict',
+
+    # Structural checks, a.k.a. protocols.
+    'SupportsIndex',
+
+    # One-off things.
+    'Annotated',
+    'assert_never',
+    'assert_type',
+    'clear_overloads',
+    'dataclass_transform',
+    'get_overloads',
+    'final',
+    'get_args',
+    'get_origin',
+    'get_type_hints',
+    'IntVar',
+    'is_typeddict',
+    'Literal',
+    'NewType',
+    'overload',
+    'override',
+    'Protocol',
+    'reveal_type',
+    'runtime',
+    'runtime_checkable',
+    'Text',
+    'TypeAlias',
+    'TypeGuard',
+    'TYPE_CHECKING',
+    'Never',
+    'NoReturn',
+    'Required',
+    'NotRequired',
+]
+
+# for backward compatibility
+PEP_560 = True
+GenericMeta = type
+
+# The functions below are modified copies of typing internal helpers.
+# They are needed by _ProtocolMeta and they provide support for PEP 646.
+
+_marker = object()
+
+
+def _check_generic(cls, parameters, elen=_marker):
+    """Check correct count for parameters of a generic cls (internal helper).
+    This gives a nice error message in case of count mismatch.
+    """
+    if not elen:
+        raise TypeError(f"{cls} is not a generic class")
+    if elen is _marker:
+        if not hasattr(cls, "__parameters__") or not cls.__parameters__:
+            raise TypeError(f"{cls} is not a generic class")
+        elen = len(cls.__parameters__)
+    alen = len(parameters)
+    if alen != elen:
+        if hasattr(cls, "__parameters__"):
+            parameters = [p for p in cls.__parameters__ if not _is_unpack(p)]
+            num_tv_tuples = sum(isinstance(p, TypeVarTuple) for p in parameters)
+            if (num_tv_tuples > 0) and (alen >= elen - num_tv_tuples):
+                return
+        raise TypeError(f"Too {'many' if alen > elen else 'few'} parameters for {cls};"
+                        f" actual {alen}, expected {elen}")
+
+
+if sys.version_info >= (3, 10):
+    def _should_collect_from_parameters(t):
+        return isinstance(
+            t, (typing._GenericAlias, _types.GenericAlias, _types.UnionType)
+        )
+elif sys.version_info >= (3, 9):
+    def _should_collect_from_parameters(t):
+        return isinstance(t, (typing._GenericAlias, _types.GenericAlias))
+else:
+    def _should_collect_from_parameters(t):
+        return isinstance(t, typing._GenericAlias) and not t._special
+
+
+def _collect_type_vars(types, typevar_types=None):
+    """Collect all type variable contained in types in order of
+    first appearance (lexicographic order). For example::
+
+        _collect_type_vars((T, List[S, T])) == (T, S)
+    """
+    if typevar_types is None:
+        typevar_types = typing.TypeVar
+    tvars = []
+    for t in types:
+        if (
+            isinstance(t, typevar_types) and
+            t not in tvars and
+            not _is_unpack(t)
+        ):
+            tvars.append(t)
+        if _should_collect_from_parameters(t):
+            tvars.extend([t for t in t.__parameters__ if t not in tvars])
+    return tuple(tvars)
+
+
+NoReturn = typing.NoReturn
+
+# Some unconstrained type variables.  These are used by the container types.
+# (These are not for export.)
+T = typing.TypeVar('T')  # Any type.
+KT = typing.TypeVar('KT')  # Key type.
+VT = typing.TypeVar('VT')  # Value type.
+T_co = typing.TypeVar('T_co', covariant=True)  # Any type covariant containers.
+T_contra = typing.TypeVar('T_contra', contravariant=True)  # Ditto contravariant.
+
+
+if sys.version_info >= (3, 11):
+    from typing import Any
+else:
+
+    class _AnyMeta(type):
+        def __instancecheck__(self, obj):
+            if self is Any:
+                raise TypeError("typing_extensions.Any cannot be used with isinstance()")
+            return super().__instancecheck__(obj)
+
+        def __repr__(self):
+            if self is Any:
+                return "typing_extensions.Any"
+            return super().__repr__()
+
+    class Any(metaclass=_AnyMeta):
+        """Special type indicating an unconstrained type.
+        - Any is compatible with every type.
+        - Any assumed to have all methods.
+        - All values assumed to be instances of Any.
+        Note that all the above statements are true from the point of view of
+        static type checkers. At runtime, Any should not be used with instance
+        checks.
+        """
+        def __new__(cls, *args, **kwargs):
+            if cls is Any:
+                raise TypeError("Any cannot be instantiated")
+            return super().__new__(cls, *args, **kwargs)
+
+
+ClassVar = typing.ClassVar
+
+# On older versions of typing there is an internal class named "Final".
+# 3.8+
+if hasattr(typing, 'Final') and sys.version_info[:2] >= (3, 7):
+    Final = typing.Final
+# 3.7
+else:
+    class _FinalForm(typing._SpecialForm, _root=True):
+
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            item = typing._type_check(parameters,
+                                      f'{self._name} accepts only a single type.')
+            return typing._GenericAlias(self, (item,))
+
+    Final = _FinalForm('Final',
+                       doc="""A special typing construct to indicate that a name
+                       cannot be re-assigned or overridden in a subclass.
+                       For example:
+
+                           MAX_SIZE: Final = 9000
+                           MAX_SIZE += 1  # Error reported by type checker
+
+                           class Connection:
+                               TIMEOUT: Final[int] = 10
+                           class FastConnector(Connection):
+                               TIMEOUT = 1  # Error reported by type checker
+
+                       There is no runtime checking of these properties.""")
+
+if sys.version_info >= (3, 11):
+    final = typing.final
+else:
+    # @final exists in 3.8+, but we backport it for all versions
+    # before 3.11 to keep support for the __final__ attribute.
+    # See https://bugs.python.org/issue46342
+    def final(f):
+        """This decorator can be used to indicate to type checkers that
+        the decorated method cannot be overridden, and decorated class
+        cannot be subclassed. For example:
+
+            class Base:
+                @final
+                def done(self) -> None:
+                    ...
+            class Sub(Base):
+                def done(self) -> None:  # Error reported by type checker
+                    ...
+            @final
+            class Leaf:
+                ...
+            class Other(Leaf):  # Error reported by type checker
+                ...
+
+        There is no runtime checking of these properties. The decorator
+        sets the ``__final__`` attribute to ``True`` on the decorated object
+        to allow runtime introspection.
+        """
+        try:
+            f.__final__ = True
+        except (AttributeError, TypeError):
+            # Skip the attribute silently if it is not writable.
+            # AttributeError happens if the object has __slots__ or a
+            # read-only property, TypeError if it's a builtin class.
+            pass
+        return f
+
+
+def IntVar(name):
+    return typing.TypeVar(name)
+
+
+# 3.8+:
+if hasattr(typing, 'Literal'):
+    Literal = typing.Literal
+# 3.7:
+else:
+    class _LiteralForm(typing._SpecialForm, _root=True):
+
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            return typing._GenericAlias(self, parameters)
+
+    Literal = _LiteralForm('Literal',
+                           doc="""A type that can be used to indicate to type checkers
+                           that the corresponding value has a value literally equivalent
+                           to the provided parameter. For example:
+
+                               var: Literal[4] = 4
+
+                           The type checker understands that 'var' is literally equal to
+                           the value 4 and no other value.
+
+                           Literal[...] cannot be subclassed. There is no runtime
+                           checking verifying that the parameter is actually a value
+                           instead of a type.""")
+
+
+_overload_dummy = typing._overload_dummy  # noqa
+
+
+if hasattr(typing, "get_overloads"):  # 3.11+
+    overload = typing.overload
+    get_overloads = typing.get_overloads
+    clear_overloads = typing.clear_overloads
+else:
+    # {module: {qualname: {firstlineno: func}}}
+    _overload_registry = collections.defaultdict(
+        functools.partial(collections.defaultdict, dict)
+    )
+
+    def overload(func):
+        """Decorator for overloaded functions/methods.
+
+        In a stub file, place two or more stub definitions for the same
+        function in a row, each decorated with @overload.  For example:
+
+        @overload
+        def utf8(value: None) -> None: ...
+        @overload
+        def utf8(value: bytes) -> bytes: ...
+        @overload
+        def utf8(value: str) -> bytes: ...
+
+        In a non-stub file (i.e. a regular .py file), do the same but
+        follow it with an implementation.  The implementation should *not*
+        be decorated with @overload.  For example:
+
+        @overload
+        def utf8(value: None) -> None: ...
+        @overload
+        def utf8(value: bytes) -> bytes: ...
+        @overload
+        def utf8(value: str) -> bytes: ...
+        def utf8(value):
+            # implementation goes here
+
+        The overloads for a function can be retrieved at runtime using the
+        get_overloads() function.
+        """
+        # classmethod and staticmethod
+        f = getattr(func, "__func__", func)
+        try:
+            _overload_registry[f.__module__][f.__qualname__][
+                f.__code__.co_firstlineno
+            ] = func
+        except AttributeError:
+            # Not a normal function; ignore.
+            pass
+        return _overload_dummy
+
+    def get_overloads(func):
+        """Return all defined overloads for *func* as a sequence."""
+        # classmethod and staticmethod
+        f = getattr(func, "__func__", func)
+        if f.__module__ not in _overload_registry:
+            return []
+        mod_dict = _overload_registry[f.__module__]
+        if f.__qualname__ not in mod_dict:
+            return []
+        return list(mod_dict[f.__qualname__].values())
+
+    def clear_overloads():
+        """Clear all overloads in the registry."""
+        _overload_registry.clear()
+
+
+# This is not a real generic class.  Don't use outside annotations.
+Type = typing.Type
+
+# Various ABCs mimicking those in collections.abc.
+# A few are simply re-exported for completeness.
+
+
+Awaitable = typing.Awaitable
+Coroutine = typing.Coroutine
+AsyncIterable = typing.AsyncIterable
+AsyncIterator = typing.AsyncIterator
+Deque = typing.Deque
+ContextManager = typing.ContextManager
+AsyncContextManager = typing.AsyncContextManager
+DefaultDict = typing.DefaultDict
+
+# 3.7.2+
+if hasattr(typing, 'OrderedDict'):
+    OrderedDict = typing.OrderedDict
+# 3.7.0-3.7.2
+else:
+    OrderedDict = typing._alias(collections.OrderedDict, (KT, VT))
+
+Counter = typing.Counter
+ChainMap = typing.ChainMap
+AsyncGenerator = typing.AsyncGenerator
+NewType = typing.NewType
+Text = typing.Text
+TYPE_CHECKING = typing.TYPE_CHECKING
+
+
+_PROTO_WHITELIST = ['Callable', 'Awaitable',
+                    'Iterable', 'Iterator', 'AsyncIterable', 'AsyncIterator',
+                    'Hashable', 'Sized', 'Container', 'Collection', 'Reversible',
+                    'ContextManager', 'AsyncContextManager']
+
+
+def _get_protocol_attrs(cls):
+    attrs = set()
+    for base in cls.__mro__[:-1]:  # without object
+        if base.__name__ in ('Protocol', 'Generic'):
+            continue
+        annotations = getattr(base, '__annotations__', {})
+        for attr in list(base.__dict__.keys()) + list(annotations.keys()):
+            if (not attr.startswith('_abc_') and attr not in (
+                    '__abstractmethods__', '__annotations__', '__weakref__',
+                    '_is_protocol', '_is_runtime_protocol', '__dict__',
+                    '__args__', '__slots__',
+                    '__next_in_mro__', '__parameters__', '__origin__',
+                    '__orig_bases__', '__extra__', '__tree_hash__',
+                    '__doc__', '__subclasshook__', '__init__', '__new__',
+                    '__module__', '_MutableMapping__marker', '_gorg')):
+                attrs.add(attr)
+    return attrs
+
+
+def _is_callable_members_only(cls):
+    return all(callable(getattr(cls, attr, None)) for attr in _get_protocol_attrs(cls))
+
+
+def _maybe_adjust_parameters(cls):
+    """Helper function used in Protocol.__init_subclass__ and _TypedDictMeta.__new__.
+
+    The contents of this function are very similar
+    to logic found in typing.Generic.__init_subclass__
+    on the CPython main branch.
+    """
+    tvars = []
+    if '__orig_bases__' in cls.__dict__:
+        tvars = typing._collect_type_vars(cls.__orig_bases__)
+        # Look for Generic[T1, ..., Tn] or Protocol[T1, ..., Tn].
+        # If found, tvars must be a subset of it.
+        # If not found, tvars is it.
+        # Also check for and reject plain Generic,
+        # and reject multiple Generic[...] and/or Protocol[...].
+        gvars = None
+        for base in cls.__orig_bases__:
+            if (isinstance(base, typing._GenericAlias) and
+                    base.__origin__ in (typing.Generic, Protocol)):
+                # for error messages
+                the_base = base.__origin__.__name__
+                if gvars is not None:
+                    raise TypeError(
+                        "Cannot inherit from Generic[...]"
+                        " and/or Protocol[...] multiple types.")
+                gvars = base.__parameters__
+        if gvars is None:
+            gvars = tvars
+        else:
+            tvarset = set(tvars)
+            gvarset = set(gvars)
+            if not tvarset <= gvarset:
+                s_vars = ', '.join(str(t) for t in tvars if t not in gvarset)
+                s_args = ', '.join(str(g) for g in gvars)
+                raise TypeError(f"Some type variables ({s_vars}) are"
+                                f" not listed in {the_base}[{s_args}]")
+            tvars = gvars
+    cls.__parameters__ = tuple(tvars)
+
+
+# 3.8+
+if hasattr(typing, 'Protocol'):
+    Protocol = typing.Protocol
+# 3.7
+else:
+
+    def _no_init(self, *args, **kwargs):
+        if type(self)._is_protocol:
+            raise TypeError('Protocols cannot be instantiated')
+
+    class _ProtocolMeta(abc.ABCMeta):  # noqa: B024
+        # This metaclass is a bit unfortunate and exists only because of the lack
+        # of __instancehook__.
+        def __instancecheck__(cls, instance):
+            # We need this method for situations where attributes are
+            # assigned in __init__.
+            if ((not getattr(cls, '_is_protocol', False) or
+                 _is_callable_members_only(cls)) and
+                    issubclass(instance.__class__, cls)):
+                return True
+            if cls._is_protocol:
+                if all(hasattr(instance, attr) and
+                       (not callable(getattr(cls, attr, None)) or
+                        getattr(instance, attr) is not None)
+                       for attr in _get_protocol_attrs(cls)):
+                    return True
+            return super().__instancecheck__(instance)
+
+    class Protocol(metaclass=_ProtocolMeta):
+        # There is quite a lot of overlapping code with typing.Generic.
+        # Unfortunately it is hard to avoid this while these live in two different
+        # modules. The duplicated code will be removed when Protocol is moved to typing.
+        """Base class for protocol classes. Protocol classes are defined as::
+
+            class Proto(Protocol):
+                def meth(self) -> int:
+                    ...
+
+        Such classes are primarily used with static type checkers that recognize
+        structural subtyping (static duck-typing), for example::
+
+            class C:
+                def meth(self) -> int:
+                    return 0
+
+            def func(x: Proto) -> int:
+                return x.meth()
+
+            func(C())  # Passes static type check
+
+        See PEP 544 for details. Protocol classes decorated with
+        @typing_extensions.runtime act as simple-minded runtime protocol that checks
+        only the presence of given attributes, ignoring their type signatures.
+
+        Protocol classes can be generic, they are defined as::
+
+            class GenProto(Protocol[T]):
+                def meth(self) -> T:
+                    ...
+        """
+        __slots__ = ()
+        _is_protocol = True
+
+        def __new__(cls, *args, **kwds):
+            if cls is Protocol:
+                raise TypeError("Type Protocol cannot be instantiated; "
+                                "it can only be used as a base class")
+            return super().__new__(cls)
+
+        @typing._tp_cache
+        def __class_getitem__(cls, params):
+            if not isinstance(params, tuple):
+                params = (params,)
+            if not params and cls is not typing.Tuple:
+                raise TypeError(
+                    f"Parameter list to {cls.__qualname__}[...] cannot be empty")
+            msg = "Parameters to generic types must be types."
+            params = tuple(typing._type_check(p, msg) for p in params)  # noqa
+            if cls is Protocol:
+                # Generic can only be subscripted with unique type variables.
+                if not all(isinstance(p, typing.TypeVar) for p in params):
+                    i = 0
+                    while isinstance(params[i], typing.TypeVar):
+                        i += 1
+                    raise TypeError(
+                        "Parameters to Protocol[...] must all be type variables."
+                        f" Parameter {i + 1} is {params[i]}")
+                if len(set(params)) != len(params):
+                    raise TypeError(
+                        "Parameters to Protocol[...] must all be unique")
+            else:
+                # Subscripting a regular Generic subclass.
+                _check_generic(cls, params, len(cls.__parameters__))
+            return typing._GenericAlias(cls, params)
+
+        def __init_subclass__(cls, *args, **kwargs):
+            if '__orig_bases__' in cls.__dict__:
+                error = typing.Generic in cls.__orig_bases__
+            else:
+                error = typing.Generic in cls.__bases__
+            if error:
+                raise TypeError("Cannot inherit from plain Generic")
+            _maybe_adjust_parameters(cls)
+
+            # Determine if this is a protocol or a concrete subclass.
+            if not cls.__dict__.get('_is_protocol', None):
+                cls._is_protocol = any(b is Protocol for b in cls.__bases__)
+
+            # Set (or override) the protocol subclass hook.
+            def _proto_hook(other):
+                if not cls.__dict__.get('_is_protocol', None):
+                    return NotImplemented
+                if not getattr(cls, '_is_runtime_protocol', False):
+                    if sys._getframe(2).f_globals['__name__'] in ['abc', 'functools']:
+                        return NotImplemented
+                    raise TypeError("Instance and class checks can only be used with"
+                                    " @runtime protocols")
+                if not _is_callable_members_only(cls):
+                    if sys._getframe(2).f_globals['__name__'] in ['abc', 'functools']:
+                        return NotImplemented
+                    raise TypeError("Protocols with non-method members"
+                                    " don't support issubclass()")
+                if not isinstance(other, type):
+                    # Same error as for issubclass(1, int)
+                    raise TypeError('issubclass() arg 1 must be a class')
+                for attr in _get_protocol_attrs(cls):
+                    for base in other.__mro__:
+                        if attr in base.__dict__:
+                            if base.__dict__[attr] is None:
+                                return NotImplemented
+                            break
+                        annotations = getattr(base, '__annotations__', {})
+                        if (isinstance(annotations, typing.Mapping) and
+                                attr in annotations and
+                                isinstance(other, _ProtocolMeta) and
+                                other._is_protocol):
+                            break
+                    else:
+                        return NotImplemented
+                return True
+            if '__subclasshook__' not in cls.__dict__:
+                cls.__subclasshook__ = _proto_hook
+
+            # We have nothing more to do for non-protocols.
+            if not cls._is_protocol:
+                return
+
+            # Check consistency of bases.
+            for base in cls.__bases__:
+                if not (base in (object, typing.Generic) or
+                        base.__module__ == 'collections.abc' and
+                        base.__name__ in _PROTO_WHITELIST or
+                        isinstance(base, _ProtocolMeta) and base._is_protocol):
+                    raise TypeError('Protocols can only inherit from other'
+                                    f' protocols, got {repr(base)}')
+            cls.__init__ = _no_init
+
+
+# 3.8+
+if hasattr(typing, 'runtime_checkable'):
+    runtime_checkable = typing.runtime_checkable
+# 3.7
+else:
+    def runtime_checkable(cls):
+        """Mark a protocol class as a runtime protocol, so that it
+        can be used with isinstance() and issubclass(). Raise TypeError
+        if applied to a non-protocol class.
+
+        This allows a simple-minded structural check very similar to the
+        one-offs in collections.abc such as Hashable.
+        """
+        if not isinstance(cls, _ProtocolMeta) or not cls._is_protocol:
+            raise TypeError('@runtime_checkable can be only applied to protocol classes,'
+                            f' got {cls!r}')
+        cls._is_runtime_protocol = True
+        return cls
+
+
+# Exists for backwards compatibility.
+runtime = runtime_checkable
+
+
+# 3.8+
+if hasattr(typing, 'SupportsIndex'):
+    SupportsIndex = typing.SupportsIndex
+# 3.7
+else:
+    @runtime_checkable
+    class SupportsIndex(Protocol):
+        __slots__ = ()
+
+        @abc.abstractmethod
+        def __index__(self) -> int:
+            pass
+
+
+if hasattr(typing, "Required"):
+    # The standard library TypedDict in Python 3.8 does not store runtime information
+    # about which (if any) keys are optional.  See https://bugs.python.org/issue38834
+    # The standard library TypedDict in Python 3.9.0/1 does not honour the "total"
+    # keyword with old-style TypedDict().  See https://bugs.python.org/issue42059
+    # The standard library TypedDict below Python 3.11 does not store runtime
+    # information about optional and required keys when using Required or NotRequired.
+    # Generic TypedDicts are also impossible using typing.TypedDict on Python <3.11.
+    TypedDict = typing.TypedDict
+    _TypedDictMeta = typing._TypedDictMeta
+    is_typeddict = typing.is_typeddict
+else:
+    def _check_fails(cls, other):
+        try:
+            if sys._getframe(1).f_globals['__name__'] not in ['abc',
+                                                              'functools',
+                                                              'typing']:
+                # Typed dicts are only for static structural subtyping.
+                raise TypeError('TypedDict does not support instance and class checks')
+        except (AttributeError, ValueError):
+            pass
+        return False
+
+    def _dict_new(*args, **kwargs):
+        if not args:
+            raise TypeError('TypedDict.__new__(): not enough arguments')
+        _, args = args[0], args[1:]  # allow the "cls" keyword be passed
+        return dict(*args, **kwargs)
+
+    _dict_new.__text_signature__ = '($cls, _typename, _fields=None, /, **kwargs)'
+
+    def _typeddict_new(*args, total=True, **kwargs):
+        if not args:
+            raise TypeError('TypedDict.__new__(): not enough arguments')
+        _, args = args[0], args[1:]  # allow the "cls" keyword be passed
+        if args:
+            typename, args = args[0], args[1:]  # allow the "_typename" keyword be passed
+        elif '_typename' in kwargs:
+            typename = kwargs.pop('_typename')
+            import warnings
+            warnings.warn("Passing '_typename' as keyword argument is deprecated",
+                          DeprecationWarning, stacklevel=2)
+        else:
+            raise TypeError("TypedDict.__new__() missing 1 required positional "
+                            "argument: '_typename'")
+        if args:
+            try:
+                fields, = args  # allow the "_fields" keyword be passed
+            except ValueError:
+                raise TypeError('TypedDict.__new__() takes from 2 to 3 '
+                                f'positional arguments but {len(args) + 2} '
+                                'were given')
+        elif '_fields' in kwargs and len(kwargs) == 1:
+            fields = kwargs.pop('_fields')
+            import warnings
+            warnings.warn("Passing '_fields' as keyword argument is deprecated",
+                          DeprecationWarning, stacklevel=2)
+        else:
+            fields = None
+
+        if fields is None:
+            fields = kwargs
+        elif kwargs:
+            raise TypeError("TypedDict takes either a dict or keyword arguments,"
+                            " but not both")
+
+        ns = {'__annotations__': dict(fields)}
+        try:
+            # Setting correct module is necessary to make typed dict classes pickleable.
+            ns['__module__'] = sys._getframe(1).f_globals.get('__name__', '__main__')
+        except (AttributeError, ValueError):
+            pass
+
+        return _TypedDictMeta(typename, (), ns, total=total)
+
+    _typeddict_new.__text_signature__ = ('($cls, _typename, _fields=None,'
+                                         ' /, *, total=True, **kwargs)')
+
+    class _TypedDictMeta(type):
+        def __init__(cls, name, bases, ns, total=True):
+            super().__init__(name, bases, ns)
+
+        def __new__(cls, name, bases, ns, total=True):
+            # Create new typed dict class object.
+            # This method is called directly when TypedDict is subclassed,
+            # or via _typeddict_new when TypedDict is instantiated. This way
+            # TypedDict supports all three syntaxes described in its docstring.
+            # Subclasses and instances of TypedDict return actual dictionaries
+            # via _dict_new.
+            ns['__new__'] = _typeddict_new if name == 'TypedDict' else _dict_new
+            # Don't insert typing.Generic into __bases__ here,
+            # or Generic.__init_subclass__ will raise TypeError
+            # in the super().__new__() call.
+            # Instead, monkey-patch __bases__ onto the class after it's been created.
+            tp_dict = super().__new__(cls, name, (dict,), ns)
+
+            if any(issubclass(base, typing.Generic) for base in bases):
+                tp_dict.__bases__ = (typing.Generic, dict)
+                _maybe_adjust_parameters(tp_dict)
+
+            annotations = {}
+            own_annotations = ns.get('__annotations__', {})
+            msg = "TypedDict('Name', {f0: t0, f1: t1, ...}); each t must be a type"
+            own_annotations = {
+                n: typing._type_check(tp, msg) for n, tp in own_annotations.items()
+            }
+            required_keys = set()
+            optional_keys = set()
+
+            for base in bases:
+                annotations.update(base.__dict__.get('__annotations__', {}))
+                required_keys.update(base.__dict__.get('__required_keys__', ()))
+                optional_keys.update(base.__dict__.get('__optional_keys__', ()))
+
+            annotations.update(own_annotations)
+            for annotation_key, annotation_type in own_annotations.items():
+                annotation_origin = get_origin(annotation_type)
+                if annotation_origin is Annotated:
+                    annotation_args = get_args(annotation_type)
+                    if annotation_args:
+                        annotation_type = annotation_args[0]
+                        annotation_origin = get_origin(annotation_type)
+
+                if annotation_origin is Required:
+                    required_keys.add(annotation_key)
+                elif annotation_origin is NotRequired:
+                    optional_keys.add(annotation_key)
+                elif total:
+                    required_keys.add(annotation_key)
+                else:
+                    optional_keys.add(annotation_key)
+
+            tp_dict.__annotations__ = annotations
+            tp_dict.__required_keys__ = frozenset(required_keys)
+            tp_dict.__optional_keys__ = frozenset(optional_keys)
+            if not hasattr(tp_dict, '__total__'):
+                tp_dict.__total__ = total
+            return tp_dict
+
+        __instancecheck__ = __subclasscheck__ = _check_fails
+
+    TypedDict = _TypedDictMeta('TypedDict', (dict,), {})
+    TypedDict.__module__ = __name__
+    TypedDict.__doc__ = \
+        """A simple typed name space. At runtime it is equivalent to a plain dict.
+
+        TypedDict creates a dictionary type that expects all of its
+        instances to have a certain set of keys, with each key
+        associated with a value of a consistent type. This expectation
+        is not checked at runtime but is only enforced by type checkers.
+        Usage::
+
+            class Point2D(TypedDict):
+                x: int
+                y: int
+                label: str
+
+            a: Point2D = {'x': 1, 'y': 2, 'label': 'good'}  # OK
+            b: Point2D = {'z': 3, 'label': 'bad'}           # Fails type check
+
+            assert Point2D(x=1, y=2, label='first') == dict(x=1, y=2, label='first')
+
+        The type info can be accessed via the Point2D.__annotations__ dict, and
+        the Point2D.__required_keys__ and Point2D.__optional_keys__ frozensets.
+        TypedDict supports two additional equivalent forms::
+
+            Point2D = TypedDict('Point2D', x=int, y=int, label=str)
+            Point2D = TypedDict('Point2D', {'x': int, 'y': int, 'label': str})
+
+        The class syntax is only supported in Python 3.6+, while two other
+        syntax forms work for Python 2.7 and 3.2+
+        """
+
+    if hasattr(typing, "_TypedDictMeta"):
+        _TYPEDDICT_TYPES = (typing._TypedDictMeta, _TypedDictMeta)
+    else:
+        _TYPEDDICT_TYPES = (_TypedDictMeta,)
+
+    def is_typeddict(tp):
+        """Check if an annotation is a TypedDict class
+
+        For example::
+            class Film(TypedDict):
+                title: str
+                year: int
+
+            is_typeddict(Film)  # => True
+            is_typeddict(Union[list, str])  # => False
+        """
+        return isinstance(tp, tuple(_TYPEDDICT_TYPES))
+
+
+if hasattr(typing, "assert_type"):
+    assert_type = typing.assert_type
+
+else:
+    def assert_type(__val, __typ):
+        """Assert (to the type checker) that the value is of the given type.
+
+        When the type checker encounters a call to assert_type(), it
+        emits an error if the value is not of the specified type::
+
+            def greet(name: str) -> None:
+                assert_type(name, str)  # ok
+                assert_type(name, int)  # type checker error
+
+        At runtime this returns the first argument unchanged and otherwise
+        does nothing.
+        """
+        return __val
+
+
+if hasattr(typing, "Required"):
+    get_type_hints = typing.get_type_hints
+else:
+    import functools
+    import types
+
+    # replaces _strip_annotations()
+    def _strip_extras(t):
+        """Strips Annotated, Required and NotRequired from a given type."""
+        if isinstance(t, _AnnotatedAlias):
+            return _strip_extras(t.__origin__)
+        if hasattr(t, "__origin__") and t.__origin__ in (Required, NotRequired):
+            return _strip_extras(t.__args__[0])
+        if isinstance(t, typing._GenericAlias):
+            stripped_args = tuple(_strip_extras(a) for a in t.__args__)
+            if stripped_args == t.__args__:
+                return t
+            return t.copy_with(stripped_args)
+        if hasattr(types, "GenericAlias") and isinstance(t, types.GenericAlias):
+            stripped_args = tuple(_strip_extras(a) for a in t.__args__)
+            if stripped_args == t.__args__:
+                return t
+            return types.GenericAlias(t.__origin__, stripped_args)
+        if hasattr(types, "UnionType") and isinstance(t, types.UnionType):
+            stripped_args = tuple(_strip_extras(a) for a in t.__args__)
+            if stripped_args == t.__args__:
+                return t
+            return functools.reduce(operator.or_, stripped_args)
+
+        return t
+
+    def get_type_hints(obj, globalns=None, localns=None, include_extras=False):
+        """Return type hints for an object.
+
+        This is often the same as obj.__annotations__, but it handles
+        forward references encoded as string literals, adds Optional[t] if a
+        default value equal to None is set and recursively replaces all
+        'Annotated[T, ...]', 'Required[T]' or 'NotRequired[T]' with 'T'
+        (unless 'include_extras=True').
+
+        The argument may be a module, class, method, or function. The annotations
+        are returned as a dictionary. For classes, annotations include also
+        inherited members.
+
+        TypeError is raised if the argument is not of a type that can contain
+        annotations, and an empty dictionary is returned if no annotations are
+        present.
+
+        BEWARE -- the behavior of globalns and localns is counterintuitive
+        (unless you are familiar with how eval() and exec() work).  The
+        search order is locals first, then globals.
+
+        - If no dict arguments are passed, an attempt is made to use the
+          globals from obj (or the respective module's globals for classes),
+          and these are also used as the locals.  If the object does not appear
+          to have globals, an empty dictionary is used.
+
+        - If one dict argument is passed, it is used for both globals and
+          locals.
+
+        - If two dict arguments are passed, they specify globals and
+          locals, respectively.
+        """
+        if hasattr(typing, "Annotated"):
+            hint = typing.get_type_hints(
+                obj, globalns=globalns, localns=localns, include_extras=True
+            )
+        else:
+            hint = typing.get_type_hints(obj, globalns=globalns, localns=localns)
+        if include_extras:
+            return hint
+        return {k: _strip_extras(t) for k, t in hint.items()}
+
+
+# Python 3.9+ has PEP 593 (Annotated)
+if hasattr(typing, 'Annotated'):
+    Annotated = typing.Annotated
+    # Not exported and not a public API, but needed for get_origin() and get_args()
+    # to work.
+    _AnnotatedAlias = typing._AnnotatedAlias
+# 3.7-3.8
+else:
+    class _AnnotatedAlias(typing._GenericAlias, _root=True):
+        """Runtime representation of an annotated type.
+
+        At its core 'Annotated[t, dec1, dec2, ...]' is an alias for the type 't'
+        with extra annotations. The alias behaves like a normal typing alias,
+        instantiating is the same as instantiating the underlying type, binding
+        it to types is also the same.
+        """
+        def __init__(self, origin, metadata):
+            if isinstance(origin, _AnnotatedAlias):
+                metadata = origin.__metadata__ + metadata
+                origin = origin.__origin__
+            super().__init__(origin, origin)
+            self.__metadata__ = metadata
+
+        def copy_with(self, params):
+            assert len(params) == 1
+            new_type = params[0]
+            return _AnnotatedAlias(new_type, self.__metadata__)
+
+        def __repr__(self):
+            return (f"typing_extensions.Annotated[{typing._type_repr(self.__origin__)}, "
+                    f"{', '.join(repr(a) for a in self.__metadata__)}]")
+
+        def __reduce__(self):
+            return operator.getitem, (
+                Annotated, (self.__origin__,) + self.__metadata__
+            )
+
+        def __eq__(self, other):
+            if not isinstance(other, _AnnotatedAlias):
+                return NotImplemented
+            if self.__origin__ != other.__origin__:
+                return False
+            return self.__metadata__ == other.__metadata__
+
+        def __hash__(self):
+            return hash((self.__origin__, self.__metadata__))
+
+    class Annotated:
+        """Add context specific metadata to a type.
+
+        Example: Annotated[int, runtime_check.Unsigned] indicates to the
+        hypothetical runtime_check module that this type is an unsigned int.
+        Every other consumer of this type can ignore this metadata and treat
+        this type as int.
+
+        The first argument to Annotated must be a valid type (and will be in
+        the __origin__ field), the remaining arguments are kept as a tuple in
+        the __extra__ field.
+
+        Details:
+
+        - It's an error to call `Annotated` with less than two arguments.
+        - Nested Annotated are flattened::
+
+            Annotated[Annotated[T, Ann1, Ann2], Ann3] == Annotated[T, Ann1, Ann2, Ann3]
+
+        - Instantiating an annotated type is equivalent to instantiating the
+        underlying type::
+
+            Annotated[C, Ann1](5) == C(5)
+
+        - Annotated can be used as a generic type alias::
+
+            Optimized = Annotated[T, runtime.Optimize()]
+            Optimized[int] == Annotated[int, runtime.Optimize()]
+
+            OptimizedList = Annotated[List[T], runtime.Optimize()]
+            OptimizedList[int] == Annotated[List[int], runtime.Optimize()]
+        """
+
+        __slots__ = ()
+
+        def __new__(cls, *args, **kwargs):
+            raise TypeError("Type Annotated cannot be instantiated.")
+
+        @typing._tp_cache
+        def __class_getitem__(cls, params):
+            if not isinstance(params, tuple) or len(params) < 2:
+                raise TypeError("Annotated[...] should be used "
+                                "with at least two arguments (a type and an "
+                                "annotation).")
+            allowed_special_forms = (ClassVar, Final)
+            if get_origin(params[0]) in allowed_special_forms:
+                origin = params[0]
+            else:
+                msg = "Annotated[t, ...]: t must be a type."
+                origin = typing._type_check(params[0], msg)
+            metadata = tuple(params[1:])
+            return _AnnotatedAlias(origin, metadata)
+
+        def __init_subclass__(cls, *args, **kwargs):
+            raise TypeError(
+                f"Cannot subclass {cls.__module__}.Annotated"
+            )
+
+# Python 3.8 has get_origin() and get_args() but those implementations aren't
+# Annotated-aware, so we can't use those. Python 3.9's versions don't support
+# ParamSpecArgs and ParamSpecKwargs, so only Python 3.10's versions will do.
+if sys.version_info[:2] >= (3, 10):
+    get_origin = typing.get_origin
+    get_args = typing.get_args
+# 3.7-3.9
+else:
+    try:
+        # 3.9+
+        from typing import _BaseGenericAlias
+    except ImportError:
+        _BaseGenericAlias = typing._GenericAlias
+    try:
+        # 3.9+
+        from typing import GenericAlias as _typing_GenericAlias
+    except ImportError:
+        _typing_GenericAlias = typing._GenericAlias
+
+    def get_origin(tp):
+        """Get the unsubscripted version of a type.
+
+        This supports generic types, Callable, Tuple, Union, Literal, Final, ClassVar
+        and Annotated. Return None for unsupported types. Examples::
+
+            get_origin(Literal[42]) is Literal
+            get_origin(int) is None
+            get_origin(ClassVar[int]) is ClassVar
+            get_origin(Generic) is Generic
+            get_origin(Generic[T]) is Generic
+            get_origin(Union[T, int]) is Union
+            get_origin(List[Tuple[T, T]][int]) == list
+            get_origin(P.args) is P
+        """
+        if isinstance(tp, _AnnotatedAlias):
+            return Annotated
+        if isinstance(tp, (typing._GenericAlias, _typing_GenericAlias, _BaseGenericAlias,
+                           ParamSpecArgs, ParamSpecKwargs)):
+            return tp.__origin__
+        if tp is typing.Generic:
+            return typing.Generic
+        return None
+
+    def get_args(tp):
+        """Get type arguments with all substitutions performed.
+
+        For unions, basic simplifications used by Union constructor are performed.
+        Examples::
+            get_args(Dict[str, int]) == (str, int)
+            get_args(int) == ()
+            get_args(Union[int, Union[T, int], str][int]) == (int, str)
+            get_args(Union[int, Tuple[T, int]][str]) == (int, Tuple[str, int])
+            get_args(Callable[[], T][int]) == ([], int)
+        """
+        if isinstance(tp, _AnnotatedAlias):
+            return (tp.__origin__,) + tp.__metadata__
+        if isinstance(tp, (typing._GenericAlias, _typing_GenericAlias)):
+            if getattr(tp, "_special", False):
+                return ()
+            res = tp.__args__
+            if get_origin(tp) is collections.abc.Callable and res[0] is not Ellipsis:
+                res = (list(res[:-1]), res[-1])
+            return res
+        return ()
+
+
+# 3.10+
+if hasattr(typing, 'TypeAlias'):
+    TypeAlias = typing.TypeAlias
+# 3.9
+elif sys.version_info[:2] >= (3, 9):
+    class _TypeAliasForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+    @_TypeAliasForm
+    def TypeAlias(self, parameters):
+        """Special marker indicating that an assignment should
+        be recognized as a proper type alias definition by type
+        checkers.
+
+        For example::
+
+            Predicate: TypeAlias = Callable[..., bool]
+
+        It's invalid when used anywhere except as in the example above.
+        """
+        raise TypeError(f"{self} is not subscriptable")
+# 3.7-3.8
+else:
+    class _TypeAliasForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+    TypeAlias = _TypeAliasForm('TypeAlias',
+                               doc="""Special marker indicating that an assignment should
+                               be recognized as a proper type alias definition by type
+                               checkers.
+
+                               For example::
+
+                                   Predicate: TypeAlias = Callable[..., bool]
+
+                               It's invalid when used anywhere except as in the example
+                               above.""")
+
+
+class _DefaultMixin:
+    """Mixin for TypeVarLike defaults."""
+
+    __slots__ = ()
+
+    def __init__(self, default):
+        if isinstance(default, (tuple, list)):
+            self.__default__ = tuple((typing._type_check(d, "Default must be a type")
+                                      for d in default))
+        elif default:
+            self.__default__ = typing._type_check(default, "Default must be a type")
+        else:
+            self.__default__ = None
+
+
+# Add default and infer_variance parameters from PEP 696 and 695
+class TypeVar(typing.TypeVar, _DefaultMixin, _root=True):
+    """Type variable."""
+
+    __module__ = 'typing'
+
+    def __init__(self, name, *constraints, bound=None,
+                 covariant=False, contravariant=False,
+                 default=None, infer_variance=False):
+        super().__init__(name, *constraints, bound=bound, covariant=covariant,
+                         contravariant=contravariant)
+        _DefaultMixin.__init__(self, default)
+        self.__infer_variance__ = infer_variance
+
+        # for pickling:
+        try:
+            def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')
+        except (AttributeError, ValueError):
+            def_mod = None
+        if def_mod != 'typing_extensions':
+            self.__module__ = def_mod
+
+
+# Python 3.10+ has PEP 612
+if hasattr(typing, 'ParamSpecArgs'):
+    ParamSpecArgs = typing.ParamSpecArgs
+    ParamSpecKwargs = typing.ParamSpecKwargs
+# 3.7-3.9
+else:
+    class _Immutable:
+        """Mixin to indicate that object should not be copied."""
+        __slots__ = ()
+
+        def __copy__(self):
+            return self
+
+        def __deepcopy__(self, memo):
+            return self
+
+    class ParamSpecArgs(_Immutable):
+        """The args for a ParamSpec object.
+
+        Given a ParamSpec object P, P.args is an instance of ParamSpecArgs.
+
+        ParamSpecArgs objects have a reference back to their ParamSpec:
+
+        P.args.__origin__ is P
+
+        This type is meant for runtime introspection and has no special meaning to
+        static type checkers.
+        """
+        def __init__(self, origin):
+            self.__origin__ = origin
+
+        def __repr__(self):
+            return f"{self.__origin__.__name__}.args"
+
+        def __eq__(self, other):
+            if not isinstance(other, ParamSpecArgs):
+                return NotImplemented
+            return self.__origin__ == other.__origin__
+
+    class ParamSpecKwargs(_Immutable):
+        """The kwargs for a ParamSpec object.
+
+        Given a ParamSpec object P, P.kwargs is an instance of ParamSpecKwargs.
+
+        ParamSpecKwargs objects have a reference back to their ParamSpec:
+
+        P.kwargs.__origin__ is P
+
+        This type is meant for runtime introspection and has no special meaning to
+        static type checkers.
+        """
+        def __init__(self, origin):
+            self.__origin__ = origin
+
+        def __repr__(self):
+            return f"{self.__origin__.__name__}.kwargs"
+
+        def __eq__(self, other):
+            if not isinstance(other, ParamSpecKwargs):
+                return NotImplemented
+            return self.__origin__ == other.__origin__
+
+# 3.10+
+if hasattr(typing, 'ParamSpec'):
+
+    # Add default Parameter - PEP 696
+    class ParamSpec(typing.ParamSpec, _DefaultMixin, _root=True):
+        """Parameter specification variable."""
+
+        __module__ = 'typing'
+
+        def __init__(self, name, *, bound=None, covariant=False, contravariant=False,
+                     default=None):
+            super().__init__(name, bound=bound, covariant=covariant,
+                             contravariant=contravariant)
+            _DefaultMixin.__init__(self, default)
+
+            # for pickling:
+            try:
+                def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                def_mod = None
+            if def_mod != 'typing_extensions':
+                self.__module__ = def_mod
+
+# 3.7-3.9
+else:
+
+    # Inherits from list as a workaround for Callable checks in Python < 3.9.2.
+    class ParamSpec(list, _DefaultMixin):
+        """Parameter specification variable.
+
+        Usage::
+
+           P = ParamSpec('P')
+
+        Parameter specification variables exist primarily for the benefit of static
+        type checkers.  They are used to forward the parameter types of one
+        callable to another callable, a pattern commonly found in higher order
+        functions and decorators.  They are only valid when used in ``Concatenate``,
+        or s the first argument to ``Callable``. In Python 3.10 and higher,
+        they are also supported in user-defined Generics at runtime.
+        See class Generic for more information on generic types.  An
+        example for annotating a decorator::
+
+           T = TypeVar('T')
+           P = ParamSpec('P')
+
+           def add_logging(f: Callable[P, T]) -> Callable[P, T]:
+               '''A type-safe decorator to add logging to a function.'''
+               def inner(*args: P.args, **kwargs: P.kwargs) -> T:
+                   logging.info(f'{f.__name__} was called')
+                   return f(*args, **kwargs)
+               return inner
+
+           @add_logging
+           def add_two(x: float, y: float) -> float:
+               '''Add two numbers together.'''
+               return x + y
+
+        Parameter specification variables defined with covariant=True or
+        contravariant=True can be used to declare covariant or contravariant
+        generic types.  These keyword arguments are valid, but their actual semantics
+        are yet to be decided.  See PEP 612 for details.
+
+        Parameter specification variables can be introspected. e.g.:
+
+           P.__name__ == 'T'
+           P.__bound__ == None
+           P.__covariant__ == False
+           P.__contravariant__ == False
+
+        Note that only parameter specification variables defined in global scope can
+        be pickled.
+        """
+
+        # Trick Generic __parameters__.
+        __class__ = typing.TypeVar
+
+        @property
+        def args(self):
+            return ParamSpecArgs(self)
+
+        @property
+        def kwargs(self):
+            return ParamSpecKwargs(self)
+
+        def __init__(self, name, *, bound=None, covariant=False, contravariant=False,
+                     default=None):
+            super().__init__([self])
+            self.__name__ = name
+            self.__covariant__ = bool(covariant)
+            self.__contravariant__ = bool(contravariant)
+            if bound:
+                self.__bound__ = typing._type_check(bound, 'Bound must be a type.')
+            else:
+                self.__bound__ = None
+            _DefaultMixin.__init__(self, default)
+
+            # for pickling:
+            try:
+                def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                def_mod = None
+            if def_mod != 'typing_extensions':
+                self.__module__ = def_mod
+
+        def __repr__(self):
+            if self.__covariant__:
+                prefix = '+'
+            elif self.__contravariant__:
+                prefix = '-'
+            else:
+                prefix = '~'
+            return prefix + self.__name__
+
+        def __hash__(self):
+            return object.__hash__(self)
+
+        def __eq__(self, other):
+            return self is other
+
+        def __reduce__(self):
+            return self.__name__
+
+        # Hack to get typing._type_check to pass.
+        def __call__(self, *args, **kwargs):
+            pass
+
+
+# 3.7-3.9
+if not hasattr(typing, 'Concatenate'):
+    # Inherits from list as a workaround for Callable checks in Python < 3.9.2.
+    class _ConcatenateGenericAlias(list):
+
+        # Trick Generic into looking into this for __parameters__.
+        __class__ = typing._GenericAlias
+
+        # Flag in 3.8.
+        _special = False
+
+        def __init__(self, origin, args):
+            super().__init__(args)
+            self.__origin__ = origin
+            self.__args__ = args
+
+        def __repr__(self):
+            _type_repr = typing._type_repr
+            return (f'{_type_repr(self.__origin__)}'
+                    f'[{", ".join(_type_repr(arg) for arg in self.__args__)}]')
+
+        def __hash__(self):
+            return hash((self.__origin__, self.__args__))
+
+        # Hack to get typing._type_check to pass in Generic.
+        def __call__(self, *args, **kwargs):
+            pass
+
+        @property
+        def __parameters__(self):
+            return tuple(
+                tp for tp in self.__args__ if isinstance(tp, (typing.TypeVar, ParamSpec))
+            )
+
+
+# 3.7-3.9
+@typing._tp_cache
+def _concatenate_getitem(self, parameters):
+    if parameters == ():
+        raise TypeError("Cannot take a Concatenate of no types.")
+    if not isinstance(parameters, tuple):
+        parameters = (parameters,)
+    if not isinstance(parameters[-1], ParamSpec):
+        raise TypeError("The last parameter to Concatenate should be a "
+                        "ParamSpec variable.")
+    msg = "Concatenate[arg, ...]: each arg must be a type."
+    parameters = tuple(typing._type_check(p, msg) for p in parameters)
+    return _ConcatenateGenericAlias(self, parameters)
+
+
+# 3.10+
+if hasattr(typing, 'Concatenate'):
+    Concatenate = typing.Concatenate
+    _ConcatenateGenericAlias = typing._ConcatenateGenericAlias # noqa
+# 3.9
+elif sys.version_info[:2] >= (3, 9):
+    @_TypeAliasForm
+    def Concatenate(self, parameters):
+        """Used in conjunction with ``ParamSpec`` and ``Callable`` to represent a
+        higher order function which adds, removes or transforms parameters of a
+        callable.
+
+        For example::
+
+           Callable[Concatenate[int, P], int]
+
+        See PEP 612 for detailed information.
+        """
+        return _concatenate_getitem(self, parameters)
+# 3.7-8
+else:
+    class _ConcatenateForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            return _concatenate_getitem(self, parameters)
+
+    Concatenate = _ConcatenateForm(
+        'Concatenate',
+        doc="""Used in conjunction with ``ParamSpec`` and ``Callable`` to represent a
+        higher order function which adds, removes or transforms parameters of a
+        callable.
+
+        For example::
+
+           Callable[Concatenate[int, P], int]
+
+        See PEP 612 for detailed information.
+        """)
+
+# 3.10+
+if hasattr(typing, 'TypeGuard'):
+    TypeGuard = typing.TypeGuard
+# 3.9
+elif sys.version_info[:2] >= (3, 9):
+    class _TypeGuardForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+    @_TypeGuardForm
+    def TypeGuard(self, parameters):
+        """Special typing form used to annotate the return type of a user-defined
+        type guard function.  ``TypeGuard`` only accepts a single type argument.
+        At runtime, functions marked this way should return a boolean.
+
+        ``TypeGuard`` aims to benefit *type narrowing* -- a technique used by static
+        type checkers to determine a more precise type of an expression within a
+        program's code flow.  Usually type narrowing is done by analyzing
+        conditional code flow and applying the narrowing to a block of code.  The
+        conditional expression here is sometimes referred to as a "type guard".
+
+        Sometimes it would be convenient to use a user-defined boolean function
+        as a type guard.  Such a function should use ``TypeGuard[...]`` as its
+        return type to alert static type checkers to this intention.
+
+        Using  ``-> TypeGuard`` tells the static type checker that for a given
+        function:
+
+        1. The return value is a boolean.
+        2. If the return value is ``True``, the type of its argument
+        is the type inside ``TypeGuard``.
+
+        For example::
+
+            def is_str(val: Union[str, float]):
+                # "isinstance" type guard
+                if isinstance(val, str):
+                    # Type of ``val`` is narrowed to ``str``
+                    ...
+                else:
+                    # Else, type of ``val`` is narrowed to ``float``.
+                    ...
+
+        Strict type narrowing is not enforced -- ``TypeB`` need not be a narrower
+        form of ``TypeA`` (it can even be a wider form) and this may lead to
+        type-unsafe results.  The main reason is to allow for things like
+        narrowing ``List[object]`` to ``List[str]`` even though the latter is not
+        a subtype of the former, since ``List`` is invariant.  The responsibility of
+        writing type-safe type guards is left to the user.
+
+        ``TypeGuard`` also works with type variables.  For more information, see
+        PEP 647 (User-Defined Type Guards).
+        """
+        item = typing._type_check(parameters, f'{self} accepts only a single type.')
+        return typing._GenericAlias(self, (item,))
+# 3.7-3.8
+else:
+    class _TypeGuardForm(typing._SpecialForm, _root=True):
+
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            item = typing._type_check(parameters,
+                                      f'{self._name} accepts only a single type')
+            return typing._GenericAlias(self, (item,))
+
+    TypeGuard = _TypeGuardForm(
+        'TypeGuard',
+        doc="""Special typing form used to annotate the return type of a user-defined
+        type guard function.  ``TypeGuard`` only accepts a single type argument.
+        At runtime, functions marked this way should return a boolean.
+
+        ``TypeGuard`` aims to benefit *type narrowing* -- a technique used by static
+        type checkers to determine a more precise type of an expression within a
+        program's code flow.  Usually type narrowing is done by analyzing
+        conditional code flow and applying the narrowing to a block of code.  The
+        conditional expression here is sometimes referred to as a "type guard".
+
+        Sometimes it would be convenient to use a user-defined boolean function
+        as a type guard.  Such a function should use ``TypeGuard[...]`` as its
+        return type to alert static type checkers to this intention.
+
+        Using  ``-> TypeGuard`` tells the static type checker that for a given
+        function:
+
+        1. The return value is a boolean.
+        2. If the return value is ``True``, the type of its argument
+        is the type inside ``TypeGuard``.
+
+        For example::
+
+            def is_str(val: Union[str, float]):
+                # "isinstance" type guard
+                if isinstance(val, str):
+                    # Type of ``val`` is narrowed to ``str``
+                    ...
+                else:
+                    # Else, type of ``val`` is narrowed to ``float``.
+                    ...
+
+        Strict type narrowing is not enforced -- ``TypeB`` need not be a narrower
+        form of ``TypeA`` (it can even be a wider form) and this may lead to
+        type-unsafe results.  The main reason is to allow for things like
+        narrowing ``List[object]`` to ``List[str]`` even though the latter is not
+        a subtype of the former, since ``List`` is invariant.  The responsibility of
+        writing type-safe type guards is left to the user.
+
+        ``TypeGuard`` also works with type variables.  For more information, see
+        PEP 647 (User-Defined Type Guards).
+        """)
+
+
+# Vendored from cpython typing._SpecialFrom
+class _SpecialForm(typing._Final, _root=True):
+    __slots__ = ('_name', '__doc__', '_getitem')
+
+    def __init__(self, getitem):
+        self._getitem = getitem
+        self._name = getitem.__name__
+        self.__doc__ = getitem.__doc__
+
+    def __getattr__(self, item):
+        if item in {'__name__', '__qualname__'}:
+            return self._name
+
+        raise AttributeError(item)
+
+    def __mro_entries__(self, bases):
+        raise TypeError(f"Cannot subclass {self!r}")
+
+    def __repr__(self):
+        return f'typing_extensions.{self._name}'
+
+    def __reduce__(self):
+        return self._name
+
+    def __call__(self, *args, **kwds):
+        raise TypeError(f"Cannot instantiate {self!r}")
+
+    def __or__(self, other):
+        return typing.Union[self, other]
+
+    def __ror__(self, other):
+        return typing.Union[other, self]
+
+    def __instancecheck__(self, obj):
+        raise TypeError(f"{self} cannot be used with isinstance()")
+
+    def __subclasscheck__(self, cls):
+        raise TypeError(f"{self} cannot be used with issubclass()")
+
+    @typing._tp_cache
+    def __getitem__(self, parameters):
+        return self._getitem(self, parameters)
+
+
+if hasattr(typing, "LiteralString"):
+    LiteralString = typing.LiteralString
+else:
+    @_SpecialForm
+    def LiteralString(self, params):
+        """Represents an arbitrary literal string.
+
+        Example::
+
+          from pip._vendor.typing_extensions import LiteralString
+
+          def query(sql: LiteralString) -> ...:
+              ...
+
+          query("SELECT * FROM table")  # ok
+          query(f"SELECT * FROM {input()}")  # not ok
+
+        See PEP 675 for details.
+
+        """
+        raise TypeError(f"{self} is not subscriptable")
+
+
+if hasattr(typing, "Self"):
+    Self = typing.Self
+else:
+    @_SpecialForm
+    def Self(self, params):
+        """Used to spell the type of "self" in classes.
+
+        Example::
+
+          from typing import Self
+
+          class ReturnsSelf:
+              def parse(self, data: bytes) -> Self:
+                  ...
+                  return self
+
+        """
+
+        raise TypeError(f"{self} is not subscriptable")
+
+
+if hasattr(typing, "Never"):
+    Never = typing.Never
+else:
+    @_SpecialForm
+    def Never(self, params):
+        """The bottom type, a type that has no members.
+
+        This can be used to define a function that should never be
+        called, or a function that never returns::
+
+            from pip._vendor.typing_extensions import Never
+
+            def never_call_me(arg: Never) -> None:
+                pass
+
+            def int_or_str(arg: int | str) -> None:
+                never_call_me(arg)  # type checker error
+                match arg:
+                    case int():
+                        print("It's an int")
+                    case str():
+                        print("It's a str")
+                    case _:
+                        never_call_me(arg)  # ok, arg is of type Never
+
+        """
+
+        raise TypeError(f"{self} is not subscriptable")
+
+
+if hasattr(typing, 'Required'):
+    Required = typing.Required
+    NotRequired = typing.NotRequired
+elif sys.version_info[:2] >= (3, 9):
+    class _ExtensionsSpecialForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+    @_ExtensionsSpecialForm
+    def Required(self, parameters):
+        """A special typing construct to mark a key of a total=False TypedDict
+        as required. For example:
+
+            class Movie(TypedDict, total=False):
+                title: Required[str]
+                year: int
+
+            m = Movie(
+                title='The Matrix',  # typechecker error if key is omitted
+                year=1999,
+            )
+
+        There is no runtime checking that a required key is actually provided
+        when instantiating a related TypedDict.
+        """
+        item = typing._type_check(parameters, f'{self._name} accepts only a single type.')
+        return typing._GenericAlias(self, (item,))
+
+    @_ExtensionsSpecialForm
+    def NotRequired(self, parameters):
+        """A special typing construct to mark a key of a TypedDict as
+        potentially missing. For example:
+
+            class Movie(TypedDict):
+                title: str
+                year: NotRequired[int]
+
+            m = Movie(
+                title='The Matrix',  # typechecker error if key is omitted
+                year=1999,
+            )
+        """
+        item = typing._type_check(parameters, f'{self._name} accepts only a single type.')
+        return typing._GenericAlias(self, (item,))
+
+else:
+    class _RequiredForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            item = typing._type_check(parameters,
+                                      f'{self._name} accepts only a single type.')
+            return typing._GenericAlias(self, (item,))
+
+    Required = _RequiredForm(
+        'Required',
+        doc="""A special typing construct to mark a key of a total=False TypedDict
+        as required. For example:
+
+            class Movie(TypedDict, total=False):
+                title: Required[str]
+                year: int
+
+            m = Movie(
+                title='The Matrix',  # typechecker error if key is omitted
+                year=1999,
+            )
+
+        There is no runtime checking that a required key is actually provided
+        when instantiating a related TypedDict.
+        """)
+    NotRequired = _RequiredForm(
+        'NotRequired',
+        doc="""A special typing construct to mark a key of a TypedDict as
+        potentially missing. For example:
+
+            class Movie(TypedDict):
+                title: str
+                year: NotRequired[int]
+
+            m = Movie(
+                title='The Matrix',  # typechecker error if key is omitted
+                year=1999,
+            )
+        """)
+
+
+if hasattr(typing, "Unpack"):  # 3.11+
+    Unpack = typing.Unpack
+elif sys.version_info[:2] >= (3, 9):
+    class _UnpackSpecialForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+    class _UnpackAlias(typing._GenericAlias, _root=True):
+        __class__ = typing.TypeVar
+
+    @_UnpackSpecialForm
+    def Unpack(self, parameters):
+        """A special typing construct to unpack a variadic type. For example:
+
+            Shape = TypeVarTuple('Shape')
+            Batch = NewType('Batch', int)
+
+            def add_batch_axis(
+                x: Array[Unpack[Shape]]
+            ) -> Array[Batch, Unpack[Shape]]: ...
+
+        """
+        item = typing._type_check(parameters, f'{self._name} accepts only a single type.')
+        return _UnpackAlias(self, (item,))
+
+    def _is_unpack(obj):
+        return isinstance(obj, _UnpackAlias)
+
+else:
+    class _UnpackAlias(typing._GenericAlias, _root=True):
+        __class__ = typing.TypeVar
+
+    class _UnpackForm(typing._SpecialForm, _root=True):
+        def __repr__(self):
+            return 'typing_extensions.' + self._name
+
+        def __getitem__(self, parameters):
+            item = typing._type_check(parameters,
+                                      f'{self._name} accepts only a single type.')
+            return _UnpackAlias(self, (item,))
+
+    Unpack = _UnpackForm(
+        'Unpack',
+        doc="""A special typing construct to unpack a variadic type. For example:
+
+            Shape = TypeVarTuple('Shape')
+            Batch = NewType('Batch', int)
+
+            def add_batch_axis(
+                x: Array[Unpack[Shape]]
+            ) -> Array[Batch, Unpack[Shape]]: ...
+
+        """)
+
+    def _is_unpack(obj):
+        return isinstance(obj, _UnpackAlias)
+
+
+if hasattr(typing, "TypeVarTuple"):  # 3.11+
+
+    # Add default Parameter - PEP 696
+    class TypeVarTuple(typing.TypeVarTuple, _DefaultMixin, _root=True):
+        """Type variable tuple."""
+
+        def __init__(self, name, *, default=None):
+            super().__init__(name)
+            _DefaultMixin.__init__(self, default)
+
+            # for pickling:
+            try:
+                def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                def_mod = None
+            if def_mod != 'typing_extensions':
+                self.__module__ = def_mod
+
+else:
+    class TypeVarTuple(_DefaultMixin):
+        """Type variable tuple.
+
+        Usage::
+
+            Ts = TypeVarTuple('Ts')
+
+        In the same way that a normal type variable is a stand-in for a single
+        type such as ``int``, a type variable *tuple* is a stand-in for a *tuple*
+        type such as ``Tuple[int, str]``.
+
+        Type variable tuples can be used in ``Generic`` declarations.
+        Consider the following example::
+
+            class Array(Generic[*Ts]): ...
+
+        The ``Ts`` type variable tuple here behaves like ``tuple[T1, T2]``,
+        where ``T1`` and ``T2`` are type variables. To use these type variables
+        as type parameters of ``Array``, we must *unpack* the type variable tuple using
+        the star operator: ``*Ts``. The signature of ``Array`` then behaves
+        as if we had simply written ``class Array(Generic[T1, T2]): ...``.
+        In contrast to ``Generic[T1, T2]``, however, ``Generic[*Shape]`` allows
+        us to parameterise the class with an *arbitrary* number of type parameters.
+
+        Type variable tuples can be used anywhere a normal ``TypeVar`` can.
+        This includes class definitions, as shown above, as well as function
+        signatures and variable annotations::
+
+            class Array(Generic[*Ts]):
+
+                def __init__(self, shape: Tuple[*Ts]):
+                    self._shape: Tuple[*Ts] = shape
+
+                def get_shape(self) -> Tuple[*Ts]:
+                    return self._shape
+
+            shape = (Height(480), Width(640))
+            x: Array[Height, Width] = Array(shape)
+            y = abs(x)  # Inferred type is Array[Height, Width]
+            z = x + x   #        ...    is Array[Height, Width]
+            x.get_shape()  #     ...    is tuple[Height, Width]
+
+        """
+
+        # Trick Generic __parameters__.
+        __class__ = typing.TypeVar
+
+        def __iter__(self):
+            yield self.__unpacked__
+
+        def __init__(self, name, *, default=None):
+            self.__name__ = name
+            _DefaultMixin.__init__(self, default)
+
+            # for pickling:
+            try:
+                def_mod = sys._getframe(1).f_globals.get('__name__', '__main__')
+            except (AttributeError, ValueError):
+                def_mod = None
+            if def_mod != 'typing_extensions':
+                self.__module__ = def_mod
+
+            self.__unpacked__ = Unpack[self]
+
+        def __repr__(self):
+            return self.__name__
+
+        def __hash__(self):
+            return object.__hash__(self)
+
+        def __eq__(self, other):
+            return self is other
+
+        def __reduce__(self):
+            return self.__name__
+
+        def __init_subclass__(self, *args, **kwds):
+            if '_root' not in kwds:
+                raise TypeError("Cannot subclass special typing classes")
+
+
+if hasattr(typing, "reveal_type"):
+    reveal_type = typing.reveal_type
+else:
+    def reveal_type(__obj: T) -> T:
+        """Reveal the inferred type of a variable.
+
+        When a static type checker encounters a call to ``reveal_type()``,
+        it will emit the inferred type of the argument::
+
+            x: int = 1
+            reveal_type(x)
+
+        Running a static type checker (e.g., ``mypy``) on this example
+        will produce output similar to 'Revealed type is "builtins.int"'.
+
+        At runtime, the function prints the runtime type of the
+        argument and returns it unchanged.
+
+        """
+        print(f"Runtime type is {type(__obj).__name__!r}", file=sys.stderr)
+        return __obj
+
+
+if hasattr(typing, "assert_never"):
+    assert_never = typing.assert_never
+else:
+    def assert_never(__arg: Never) -> Never:
+        """Assert to the type checker that a line of code is unreachable.
+
+        Example::
+
+            def int_or_str(arg: int | str) -> None:
+                match arg:
+                    case int():
+                        print("It's an int")
+                    case str():
+                        print("It's a str")
+                    case _:
+                        assert_never(arg)
+
+        If a type checker finds that a call to assert_never() is
+        reachable, it will emit an error.
+
+        At runtime, this throws an exception when called.
+
+        """
+        raise AssertionError("Expected code to be unreachable")
+
+
+if hasattr(typing, 'dataclass_transform'):
+    dataclass_transform = typing.dataclass_transform
+else:
+    def dataclass_transform(
+        *,
+        eq_default: bool = True,
+        order_default: bool = False,
+        kw_only_default: bool = False,
+        field_specifiers: typing.Tuple[
+            typing.Union[typing.Type[typing.Any], typing.Callable[..., typing.Any]],
+            ...
+        ] = (),
+        **kwargs: typing.Any,
+    ) -> typing.Callable[[T], T]:
+        """Decorator that marks a function, class, or metaclass as providing
+        dataclass-like behavior.
+
+        Example:
+
+            from pip._vendor.typing_extensions import dataclass_transform
+
+            _T = TypeVar("_T")
+
+            # Used on a decorator function
+            @dataclass_transform()
+            def create_model(cls: type[_T]) -> type[_T]:
+                ...
+                return cls
+
+            @create_model
+            class CustomerModel:
+                id: int
+                name: str
+
+            # Used on a base class
+            @dataclass_transform()
+            class ModelBase: ...
+
+            class CustomerModel(ModelBase):
+                id: int
+                name: str
+
+            # Used on a metaclass
+            @dataclass_transform()
+            class ModelMeta(type): ...
+
+            class ModelBase(metaclass=ModelMeta): ...
+
+            class CustomerModel(ModelBase):
+                id: int
+                name: str
+
+        Each of the ``CustomerModel`` classes defined in this example will now
+        behave similarly to a dataclass created with the ``@dataclasses.dataclass``
+        decorator. For example, the type checker will synthesize an ``__init__``
+        method.
+
+        The arguments to this decorator can be used to customize this behavior:
+        - ``eq_default`` indicates whether the ``eq`` parameter is assumed to be
+          True or False if it is omitted by the caller.
+        - ``order_default`` indicates whether the ``order`` parameter is
+          assumed to be True or False if it is omitted by the caller.
+        - ``kw_only_default`` indicates whether the ``kw_only`` parameter is
+          assumed to be True or False if it is omitted by the caller.
+        - ``field_specifiers`` specifies a static list of supported classes
+          or functions that describe fields, similar to ``dataclasses.field()``.
+
+        At runtime, this decorator records its arguments in the
+        ``__dataclass_transform__`` attribute on the decorated object.
+
+        See PEP 681 for details.
+
+        """
+        def decorator(cls_or_fn):
+            cls_or_fn.__dataclass_transform__ = {
+                "eq_default": eq_default,
+                "order_default": order_default,
+                "kw_only_default": kw_only_default,
+                "field_specifiers": field_specifiers,
+                "kwargs": kwargs,
+            }
+            return cls_or_fn
+        return decorator
+
+
+if hasattr(typing, "override"):
+    override = typing.override
+else:
+    _F = typing.TypeVar("_F", bound=typing.Callable[..., typing.Any])
+
+    def override(__arg: _F) -> _F:
+        """Indicate that a method is intended to override a method in a base class.
+
+        Usage:
+
+            class Base:
+                def method(self) -> None: ...
+                    pass
+
+            class Child(Base):
+                @override
+                def method(self) -> None:
+                    super().method()
+
+        When this decorator is applied to a method, the type checker will
+        validate that it overrides a method with the same name on a base class.
+        This helps prevent bugs that may occur when a base class is changed
+        without an equivalent change to a child class.
+
+        See PEP 698 for details.
+
+        """
+        return __arg
+
+
+# We have to do some monkey patching to deal with the dual nature of
+# Unpack/TypeVarTuple:
+# - We want Unpack to be a kind of TypeVar so it gets accepted in
+#   Generic[Unpack[Ts]]
+# - We want it to *not* be treated as a TypeVar for the purposes of
+#   counting generic parameters, so that when we subscript a generic,
+#   the runtime doesn't try to substitute the Unpack with the subscripted type.
+if not hasattr(typing, "TypeVarTuple"):
+    typing._collect_type_vars = _collect_type_vars
+    typing._check_generic = _check_generic
+
+
+# Backport typing.NamedTuple as it exists in Python 3.11.
+# In 3.11, the ability to define generic `NamedTuple`s was supported.
+# This was explicitly disallowed in 3.9-3.10, and only half-worked in <=3.8.
+if sys.version_info >= (3, 11):
+    NamedTuple = typing.NamedTuple
+else:
+    def _caller():
+        try:
+            return sys._getframe(2).f_globals.get('__name__', '__main__')
+        except (AttributeError, ValueError):  # For platforms without _getframe()
+            return None
+
+    def _make_nmtuple(name, types, module, defaults=()):
+        fields = [n for n, t in types]
+        annotations = {n: typing._type_check(t, f"field {n} annotation must be a type")
+                       for n, t in types}
+        nm_tpl = collections.namedtuple(name, fields,
+                                        defaults=defaults, module=module)
+        nm_tpl.__annotations__ = nm_tpl.__new__.__annotations__ = annotations
+        # The `_field_types` attribute was removed in 3.9;
+        # in earlier versions, it is the same as the `__annotations__` attribute
+        if sys.version_info < (3, 9):
+            nm_tpl._field_types = annotations
+        return nm_tpl
+
+    _prohibited_namedtuple_fields = typing._prohibited
+    _special_namedtuple_fields = frozenset({'__module__', '__name__', '__annotations__'})
+
+    class _NamedTupleMeta(type):
+        def __new__(cls, typename, bases, ns):
+            assert _NamedTuple in bases
+            for base in bases:
+                if base is not _NamedTuple and base is not typing.Generic:
+                    raise TypeError(
+                        'can only inherit from a NamedTuple type and Generic')
+            bases = tuple(tuple if base is _NamedTuple else base for base in bases)
+            types = ns.get('__annotations__', {})
+            default_names = []
+            for field_name in types:
+                if field_name in ns:
+                    default_names.append(field_name)
+                elif default_names:
+                    raise TypeError(f"Non-default namedtuple field {field_name} "
+                                    f"cannot follow default field"
+                                    f"{'s' if len(default_names) > 1 else ''} "
+                                    f"{', '.join(default_names)}")
+            nm_tpl = _make_nmtuple(
+                typename, types.items(),
+                defaults=[ns[n] for n in default_names],
+                module=ns['__module__']
+            )
+            nm_tpl.__bases__ = bases
+            if typing.Generic in bases:
+                class_getitem = typing.Generic.__class_getitem__.__func__
+                nm_tpl.__class_getitem__ = classmethod(class_getitem)
+            # update from user namespace without overriding special namedtuple attributes
+            for key in ns:
+                if key in _prohibited_namedtuple_fields:
+                    raise AttributeError("Cannot overwrite NamedTuple attribute " + key)
+                elif key not in _special_namedtuple_fields and key not in nm_tpl._fields:
+                    setattr(nm_tpl, key, ns[key])
+            if typing.Generic in bases:
+                nm_tpl.__init_subclass__()
+            return nm_tpl
+
+    def NamedTuple(__typename, __fields=None, **kwargs):
+        if __fields is None:
+            __fields = kwargs.items()
+        elif kwargs:
+            raise TypeError("Either list of fields or keywords"
+                            " can be provided to NamedTuple, not both")
+        return _make_nmtuple(__typename, __fields, module=_caller())
+
+    NamedTuple.__doc__ = typing.NamedTuple.__doc__
+    _NamedTuple = type.__new__(_NamedTupleMeta, 'NamedTuple', (), {})
+
+    # On 3.8+, alter the signature so that it matches typing.NamedTuple.
+    # The signature of typing.NamedTuple on >=3.8 is invalid syntax in Python 3.7,
+    # so just leave the signature as it is on 3.7.
+    if sys.version_info >= (3, 8):
+        NamedTuple.__text_signature__ = '(typename, fields=None, /, **kwargs)'
+
+    def _namedtuple_mro_entries(bases):
+        assert NamedTuple in bases
+        return (_NamedTuple,)
+
+    NamedTuple.__mro_entries__ = _namedtuple_mro_entries
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/__init__.py
new file mode 100644
index 0000000..c6fa382
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/__init__.py
@@ -0,0 +1,102 @@
+"""
+Python HTTP library with thread-safe connection pooling, file post support, user friendly, and more
+"""
+from __future__ import absolute_import
+
+# Set default logging handler to avoid "No handler found" warnings.
+import logging
+import warnings
+from logging import NullHandler
+
+from . import exceptions
+from ._version import __version__
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool, connection_from_url
+from .filepost import encode_multipart_formdata
+from .poolmanager import PoolManager, ProxyManager, proxy_from_url
+from .response import HTTPResponse
+from .util.request import make_headers
+from .util.retry import Retry
+from .util.timeout import Timeout
+from .util.url import get_host
+
+# === NOTE TO REPACKAGERS AND VENDORS ===
+# Please delete this block, this logic is only
+# for urllib3 being distributed via PyPI.
+# See: https://github.com/urllib3/urllib3/issues/2680
+try:
+    import urllib3_secure_extra  # type: ignore # noqa: F401
+except ImportError:
+    pass
+else:
+    warnings.warn(
+        "'urllib3[secure]' extra is deprecated and will be removed "
+        "in a future release of urllib3 2.x. Read more in this issue: "
+        "https://github.com/urllib3/urllib3/issues/2680",
+        category=DeprecationWarning,
+        stacklevel=2,
+    )
+
+__author__ = "Andrey Petrov (andrey.petrov@shazow.net)"
+__license__ = "MIT"
+__version__ = __version__
+
+__all__ = (
+    "HTTPConnectionPool",
+    "HTTPSConnectionPool",
+    "PoolManager",
+    "ProxyManager",
+    "HTTPResponse",
+    "Retry",
+    "Timeout",
+    "add_stderr_logger",
+    "connection_from_url",
+    "disable_warnings",
+    "encode_multipart_formdata",
+    "get_host",
+    "make_headers",
+    "proxy_from_url",
+)
+
+logging.getLogger(__name__).addHandler(NullHandler())
+
+
+def add_stderr_logger(level=logging.DEBUG):
+    """
+    Helper for quickly adding a StreamHandler to the logger. Useful for
+    debugging.
+
+    Returns the handler after adding it.
+    """
+    # This method needs to be in this __init__.py to get the __name__ correct
+    # even if urllib3 is vendored within another package.
+    logger = logging.getLogger(__name__)
+    handler = logging.StreamHandler()
+    handler.setFormatter(logging.Formatter("%(asctime)s %(levelname)s %(message)s"))
+    logger.addHandler(handler)
+    logger.setLevel(level)
+    logger.debug("Added a stderr logging handler to logger: %s", __name__)
+    return handler
+
+
+# ... Clean up.
+del NullHandler
+
+
+# All warning filters *must* be appended unless you're really certain that they
+# shouldn't be: otherwise, it's very hard for users to use most Python
+# mechanisms to silence them.
+# SecurityWarning's always go off by default.
+warnings.simplefilter("always", exceptions.SecurityWarning, append=True)
+# SubjectAltNameWarning's should go off once per host
+warnings.simplefilter("default", exceptions.SubjectAltNameWarning, append=True)
+# InsecurePlatformWarning's don't vary between requests, so we keep it default.
+warnings.simplefilter("default", exceptions.InsecurePlatformWarning, append=True)
+# SNIMissingWarnings should go off only once.
+warnings.simplefilter("default", exceptions.SNIMissingWarning, append=True)
+
+
+def disable_warnings(category=exceptions.HTTPWarning):
+    """
+    Helper for quickly disabling all urllib3 warnings.
+    """
+    warnings.simplefilter("ignore", category)
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_collections.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_collections.py
new file mode 100644
index 0000000..da9857e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_collections.py
@@ -0,0 +1,337 @@
+from __future__ import absolute_import
+
+try:
+    from collections.abc import Mapping, MutableMapping
+except ImportError:
+    from collections import Mapping, MutableMapping
+try:
+    from threading import RLock
+except ImportError:  # Platform-specific: No threads available
+
+    class RLock:
+        def __enter__(self):
+            pass
+
+        def __exit__(self, exc_type, exc_value, traceback):
+            pass
+
+
+from collections import OrderedDict
+
+from .exceptions import InvalidHeader
+from .packages import six
+from .packages.six import iterkeys, itervalues
+
+__all__ = ["RecentlyUsedContainer", "HTTPHeaderDict"]
+
+
+_Null = object()
+
+
+class RecentlyUsedContainer(MutableMapping):
+    """
+    Provides a thread-safe dict-like container which maintains up to
+    ``maxsize`` keys while throwing away the least-recently-used keys beyond
+    ``maxsize``.
+
+    :param maxsize:
+        Maximum number of recent elements to retain.
+
+    :param dispose_func:
+        Every time an item is evicted from the container,
+        ``dispose_func(value)`` is called.  Callback which will get called
+    """
+
+    ContainerCls = OrderedDict
+
+    def __init__(self, maxsize=10, dispose_func=None):
+        self._maxsize = maxsize
+        self.dispose_func = dispose_func
+
+        self._container = self.ContainerCls()
+        self.lock = RLock()
+
+    def __getitem__(self, key):
+        # Re-insert the item, moving it to the end of the eviction line.
+        with self.lock:
+            item = self._container.pop(key)
+            self._container[key] = item
+            return item
+
+    def __setitem__(self, key, value):
+        evicted_value = _Null
+        with self.lock:
+            # Possibly evict the existing value of 'key'
+            evicted_value = self._container.get(key, _Null)
+            self._container[key] = value
+
+            # If we didn't evict an existing value, we might have to evict the
+            # least recently used item from the beginning of the container.
+            if len(self._container) > self._maxsize:
+                _key, evicted_value = self._container.popitem(last=False)
+
+        if self.dispose_func and evicted_value is not _Null:
+            self.dispose_func(evicted_value)
+
+    def __delitem__(self, key):
+        with self.lock:
+            value = self._container.pop(key)
+
+        if self.dispose_func:
+            self.dispose_func(value)
+
+    def __len__(self):
+        with self.lock:
+            return len(self._container)
+
+    def __iter__(self):
+        raise NotImplementedError(
+            "Iteration over this class is unlikely to be threadsafe."
+        )
+
+    def clear(self):
+        with self.lock:
+            # Copy pointers to all values, then wipe the mapping
+            values = list(itervalues(self._container))
+            self._container.clear()
+
+        if self.dispose_func:
+            for value in values:
+                self.dispose_func(value)
+
+    def keys(self):
+        with self.lock:
+            return list(iterkeys(self._container))
+
+
+class HTTPHeaderDict(MutableMapping):
+    """
+    :param headers:
+        An iterable of field-value pairs. Must not contain multiple field names
+        when compared case-insensitively.
+
+    :param kwargs:
+        Additional field-value pairs to pass in to ``dict.update``.
+
+    A ``dict`` like container for storing HTTP Headers.
+
+    Field names are stored and compared case-insensitively in compliance with
+    RFC 7230. Iteration provides the first case-sensitive key seen for each
+    case-insensitive pair.
+
+    Using ``__setitem__`` syntax overwrites fields that compare equal
+    case-insensitively in order to maintain ``dict``'s api. For fields that
+    compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
+    in a loop.
+
+    If multiple fields that are equal case-insensitively are passed to the
+    constructor or ``.update``, the behavior is undefined and some will be
+    lost.
+
+    >>> headers = HTTPHeaderDict()
+    >>> headers.add('Set-Cookie', 'foo=bar')
+    >>> headers.add('set-cookie', 'baz=quxx')
+    >>> headers['content-length'] = '7'
+    >>> headers['SET-cookie']
+    'foo=bar, baz=quxx'
+    >>> headers['Content-Length']
+    '7'
+    """
+
+    def __init__(self, headers=None, **kwargs):
+        super(HTTPHeaderDict, self).__init__()
+        self._container = OrderedDict()
+        if headers is not None:
+            if isinstance(headers, HTTPHeaderDict):
+                self._copy_from(headers)
+            else:
+                self.extend(headers)
+        if kwargs:
+            self.extend(kwargs)
+
+    def __setitem__(self, key, val):
+        self._container[key.lower()] = [key, val]
+        return self._container[key.lower()]
+
+    def __getitem__(self, key):
+        val = self._container[key.lower()]
+        return ", ".join(val[1:])
+
+    def __delitem__(self, key):
+        del self._container[key.lower()]
+
+    def __contains__(self, key):
+        return key.lower() in self._container
+
+    def __eq__(self, other):
+        if not isinstance(other, Mapping) and not hasattr(other, "keys"):
+            return False
+        if not isinstance(other, type(self)):
+            other = type(self)(other)
+        return dict((k.lower(), v) for k, v in self.itermerged()) == dict(
+            (k.lower(), v) for k, v in other.itermerged()
+        )
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    if six.PY2:  # Python 2
+        iterkeys = MutableMapping.iterkeys
+        itervalues = MutableMapping.itervalues
+
+    __marker = object()
+
+    def __len__(self):
+        return len(self._container)
+
+    def __iter__(self):
+        # Only provide the originally cased names
+        for vals in self._container.values():
+            yield vals[0]
+
+    def pop(self, key, default=__marker):
+        """D.pop(k[,d]) -> v, remove specified key and return the corresponding value.
+        If key is not found, d is returned if given, otherwise KeyError is raised.
+        """
+        # Using the MutableMapping function directly fails due to the private marker.
+        # Using ordinary dict.pop would expose the internal structures.
+        # So let's reinvent the wheel.
+        try:
+            value = self[key]
+        except KeyError:
+            if default is self.__marker:
+                raise
+            return default
+        else:
+            del self[key]
+            return value
+
+    def discard(self, key):
+        try:
+            del self[key]
+        except KeyError:
+            pass
+
+    def add(self, key, val):
+        """Adds a (name, value) pair, doesn't overwrite the value if it already
+        exists.
+
+        >>> headers = HTTPHeaderDict(foo='bar')
+        >>> headers.add('Foo', 'baz')
+        >>> headers['foo']
+        'bar, baz'
+        """
+        key_lower = key.lower()
+        new_vals = [key, val]
+        # Keep the common case aka no item present as fast as possible
+        vals = self._container.setdefault(key_lower, new_vals)
+        if new_vals is not vals:
+            vals.append(val)
+
+    def extend(self, *args, **kwargs):
+        """Generic import function for any type of header-like object.
+        Adapted version of MutableMapping.update in order to insert items
+        with self.add instead of self.__setitem__
+        """
+        if len(args) > 1:
+            raise TypeError(
+                "extend() takes at most 1 positional "
+                "arguments ({0} given)".format(len(args))
+            )
+        other = args[0] if len(args) >= 1 else ()
+
+        if isinstance(other, HTTPHeaderDict):
+            for key, val in other.iteritems():
+                self.add(key, val)
+        elif isinstance(other, Mapping):
+            for key in other:
+                self.add(key, other[key])
+        elif hasattr(other, "keys"):
+            for key in other.keys():
+                self.add(key, other[key])
+        else:
+            for key, value in other:
+                self.add(key, value)
+
+        for key, value in kwargs.items():
+            self.add(key, value)
+
+    def getlist(self, key, default=__marker):
+        """Returns a list of all the values for the named field. Returns an
+        empty list if the key doesn't exist."""
+        try:
+            vals = self._container[key.lower()]
+        except KeyError:
+            if default is self.__marker:
+                return []
+            return default
+        else:
+            return vals[1:]
+
+    # Backwards compatibility for httplib
+    getheaders = getlist
+    getallmatchingheaders = getlist
+    iget = getlist
+
+    # Backwards compatibility for http.cookiejar
+    get_all = getlist
+
+    def __repr__(self):
+        return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
+
+    def _copy_from(self, other):
+        for key in other:
+            val = other.getlist(key)
+            if isinstance(val, list):
+                # Don't need to convert tuples
+                val = list(val)
+            self._container[key.lower()] = [key] + val
+
+    def copy(self):
+        clone = type(self)()
+        clone._copy_from(self)
+        return clone
+
+    def iteritems(self):
+        """Iterate over all header lines, including duplicate ones."""
+        for key in self:
+            vals = self._container[key.lower()]
+            for val in vals[1:]:
+                yield vals[0], val
+
+    def itermerged(self):
+        """Iterate over all headers, merging duplicate ones together."""
+        for key in self:
+            val = self._container[key.lower()]
+            yield val[0], ", ".join(val[1:])
+
+    def items(self):
+        return list(self.iteritems())
+
+    @classmethod
+    def from_httplib(cls, message):  # Python 2
+        """Read headers from a Python 2 httplib message object."""
+        # python2.7 does not expose a proper API for exporting multiheaders
+        # efficiently. This function re-reads raw lines from the message
+        # object and extracts the multiheaders properly.
+        obs_fold_continued_leaders = (" ", "\t")
+        headers = []
+
+        for line in message.headers:
+            if line.startswith(obs_fold_continued_leaders):
+                if not headers:
+                    # We received a header line that starts with OWS as described
+                    # in RFC-7230 S3.2.4. This indicates a multiline header, but
+                    # there exists no previous header to which we can attach it.
+                    raise InvalidHeader(
+                        "Header continuation with no previous header: %s" % line
+                    )
+                else:
+                    key, value = headers[-1]
+                    headers[-1] = (key, value + " " + line.strip())
+                    continue
+
+            key, value = line.split(":", 1)
+            headers.append((key, value.strip()))
+
+        return cls(headers)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_version.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_version.py
new file mode 100644
index 0000000..6fbc84b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/_version.py
@@ -0,0 +1,2 @@
+# This file is protected via CODEOWNERS
+__version__ = "1.26.12"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connection.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connection.py
new file mode 100644
index 0000000..10fb36c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connection.py
@@ -0,0 +1,567 @@
+from __future__ import absolute_import
+
+import datetime
+import logging
+import os
+import re
+import socket
+import warnings
+from socket import error as SocketError
+from socket import timeout as SocketTimeout
+
+from .packages import six
+from .packages.six.moves.http_client import HTTPConnection as _HTTPConnection
+from .packages.six.moves.http_client import HTTPException  # noqa: F401
+from .util.proxy import create_proxy_ssl_context
+
+try:  # Compiled with SSL?
+    import ssl
+
+    BaseSSLError = ssl.SSLError
+except (ImportError, AttributeError):  # Platform-specific: No SSL.
+    ssl = None
+
+    class BaseSSLError(BaseException):
+        pass
+
+
+try:
+    # Python 3: not a no-op, we're adding this to the namespace so it can be imported.
+    ConnectionError = ConnectionError
+except NameError:
+    # Python 2
+    class ConnectionError(Exception):
+        pass
+
+
+try:  # Python 3:
+    # Not a no-op, we're adding this to the namespace so it can be imported.
+    BrokenPipeError = BrokenPipeError
+except NameError:  # Python 2:
+
+    class BrokenPipeError(Exception):
+        pass
+
+
+from ._collections import HTTPHeaderDict  # noqa (historical, removed in v2)
+from ._version import __version__
+from .exceptions import (
+    ConnectTimeoutError,
+    NewConnectionError,
+    SubjectAltNameWarning,
+    SystemTimeWarning,
+)
+from .util import SKIP_HEADER, SKIPPABLE_HEADERS, connection
+from .util.ssl_ import (
+    assert_fingerprint,
+    create_urllib3_context,
+    is_ipaddress,
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    ssl_wrap_socket,
+)
+from .util.ssl_match_hostname import CertificateError, match_hostname
+
+log = logging.getLogger(__name__)
+
+port_by_scheme = {"http": 80, "https": 443}
+
+# When it comes time to update this value as a part of regular maintenance
+# (ie test_recent_date is failing) update it to ~6 months before the current date.
+RECENT_DATE = datetime.date(2022, 1, 1)
+
+_CONTAINS_CONTROL_CHAR_RE = re.compile(r"[^-!#$%&'*+.^_`|~0-9a-zA-Z]")
+
+
+class HTTPConnection(_HTTPConnection, object):
+    """
+    Based on :class:`http.client.HTTPConnection` but provides an extra constructor
+    backwards-compatibility layer between older and newer Pythons.
+
+    Additional keyword parameters are used to configure attributes of the connection.
+    Accepted parameters include:
+
+    - ``strict``: See the documentation on :class:`urllib3.connectionpool.HTTPConnectionPool`
+    - ``source_address``: Set the source address for the current connection.
+    - ``socket_options``: Set specific options on the underlying socket. If not specified, then
+      defaults are loaded from ``HTTPConnection.default_socket_options`` which includes disabling
+      Nagle's algorithm (sets TCP_NODELAY to 1) unless the connection is behind a proxy.
+
+      For example, if you wish to enable TCP Keep Alive in addition to the defaults,
+      you might pass:
+
+      .. code-block:: python
+
+         HTTPConnection.default_socket_options + [
+             (socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1),
+         ]
+
+      Or you may want to disable the defaults by passing an empty list (e.g., ``[]``).
+    """
+
+    default_port = port_by_scheme["http"]
+
+    #: Disable Nagle's algorithm by default.
+    #: ``[(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]``
+    default_socket_options = [(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)]
+
+    #: Whether this connection verifies the host's certificate.
+    is_verified = False
+
+    #: Whether this proxy connection (if used) verifies the proxy host's
+    #: certificate.
+    proxy_is_verified = None
+
+    def __init__(self, *args, **kw):
+        if not six.PY2:
+            kw.pop("strict", None)
+
+        # Pre-set source_address.
+        self.source_address = kw.get("source_address")
+
+        #: The socket options provided by the user. If no options are
+        #: provided, we use the default options.
+        self.socket_options = kw.pop("socket_options", self.default_socket_options)
+
+        # Proxy options provided by the user.
+        self.proxy = kw.pop("proxy", None)
+        self.proxy_config = kw.pop("proxy_config", None)
+
+        _HTTPConnection.__init__(self, *args, **kw)
+
+    @property
+    def host(self):
+        """
+        Getter method to remove any trailing dots that indicate the hostname is an FQDN.
+
+        In general, SSL certificates don't include the trailing dot indicating a
+        fully-qualified domain name, and thus, they don't validate properly when
+        checked against a domain name that includes the dot. In addition, some
+        servers may not expect to receive the trailing dot when provided.
+
+        However, the hostname with trailing dot is critical to DNS resolution; doing a
+        lookup with the trailing dot will properly only resolve the appropriate FQDN,
+        whereas a lookup without a trailing dot will search the system's search domain
+        list. Thus, it's important to keep the original host around for use only in
+        those cases where it's appropriate (i.e., when doing DNS lookup to establish the
+        actual TCP connection across which we're going to send HTTP requests).
+        """
+        return self._dns_host.rstrip(".")
+
+    @host.setter
+    def host(self, value):
+        """
+        Setter for the `host` property.
+
+        We assume that only urllib3 uses the _dns_host attribute; httplib itself
+        only uses `host`, and it seems reasonable that other libraries follow suit.
+        """
+        self._dns_host = value
+
+    def _new_conn(self):
+        """Establish a socket connection and set nodelay settings on it.
+
+        :return: New socket connection.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw["source_address"] = self.source_address
+
+        if self.socket_options:
+            extra_kw["socket_options"] = self.socket_options
+
+        try:
+            conn = connection.create_connection(
+                (self._dns_host, self.port), self.timeout, **extra_kw
+            )
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self,
+                "Connection to %s timed out. (connect timeout=%s)"
+                % (self.host, self.timeout),
+            )
+
+        except SocketError as e:
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e
+            )
+
+        return conn
+
+    def _is_using_tunnel(self):
+        # Google App Engine's httplib does not define _tunnel_host
+        return getattr(self, "_tunnel_host", None)
+
+    def _prepare_conn(self, conn):
+        self.sock = conn
+        if self._is_using_tunnel():
+            # TODO: Fix tunnel so it doesn't depend on self.sock state.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+    def connect(self):
+        conn = self._new_conn()
+        self._prepare_conn(conn)
+
+    def putrequest(self, method, url, *args, **kwargs):
+        """ """
+        # Empty docstring because the indentation of CPython's implementation
+        # is broken but we don't want this method in our documentation.
+        match = _CONTAINS_CONTROL_CHAR_RE.search(method)
+        if match:
+            raise ValueError(
+                "Method cannot contain non-token characters %r (found at least %r)"
+                % (method, match.group())
+            )
+
+        return _HTTPConnection.putrequest(self, method, url, *args, **kwargs)
+
+    def putheader(self, header, *values):
+        """ """
+        if not any(isinstance(v, str) and v == SKIP_HEADER for v in values):
+            _HTTPConnection.putheader(self, header, *values)
+        elif six.ensure_str(header.lower()) not in SKIPPABLE_HEADERS:
+            raise ValueError(
+                "urllib3.util.SKIP_HEADER only supports '%s'"
+                % ("', '".join(map(str.title, sorted(SKIPPABLE_HEADERS))),)
+            )
+
+    def request(self, method, url, body=None, headers=None):
+        if headers is None:
+            headers = {}
+        else:
+            # Avoid modifying the headers passed into .request()
+            headers = headers.copy()
+        if "user-agent" not in (six.ensure_str(k.lower()) for k in headers):
+            headers["User-Agent"] = _get_default_user_agent()
+        super(HTTPConnection, self).request(method, url, body=body, headers=headers)
+
+    def request_chunked(self, method, url, body=None, headers=None):
+        """
+        Alternative to the common request method, which sends the
+        body with chunked encoding and not as one block
+        """
+        headers = headers or {}
+        header_keys = set([six.ensure_str(k.lower()) for k in headers])
+        skip_accept_encoding = "accept-encoding" in header_keys
+        skip_host = "host" in header_keys
+        self.putrequest(
+            method, url, skip_accept_encoding=skip_accept_encoding, skip_host=skip_host
+        )
+        if "user-agent" not in header_keys:
+            self.putheader("User-Agent", _get_default_user_agent())
+        for header, value in headers.items():
+            self.putheader(header, value)
+        if "transfer-encoding" not in header_keys:
+            self.putheader("Transfer-Encoding", "chunked")
+        self.endheaders()
+
+        if body is not None:
+            stringish_types = six.string_types + (bytes,)
+            if isinstance(body, stringish_types):
+                body = (body,)
+            for chunk in body:
+                if not chunk:
+                    continue
+                if not isinstance(chunk, bytes):
+                    chunk = chunk.encode("utf8")
+                len_str = hex(len(chunk))[2:]
+                to_send = bytearray(len_str.encode())
+                to_send += b"\r\n"
+                to_send += chunk
+                to_send += b"\r\n"
+                self.send(to_send)
+
+        # After the if clause, to always have a closed body
+        self.send(b"0\r\n\r\n")
+
+
+class HTTPSConnection(HTTPConnection):
+    """
+    Many of the parameters to this constructor are passed to the underlying SSL
+    socket by means of :py:func:`urllib3.util.ssl_wrap_socket`.
+    """
+
+    default_port = port_by_scheme["https"]
+
+    cert_reqs = None
+    ca_certs = None
+    ca_cert_dir = None
+    ca_cert_data = None
+    ssl_version = None
+    assert_fingerprint = None
+    tls_in_tls_required = False
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        key_file=None,
+        cert_file=None,
+        key_password=None,
+        strict=None,
+        timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+        ssl_context=None,
+        server_hostname=None,
+        **kw
+    ):
+
+        HTTPConnection.__init__(self, host, port, strict=strict, timeout=timeout, **kw)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.key_password = key_password
+        self.ssl_context = ssl_context
+        self.server_hostname = server_hostname
+
+        # Required property for Google AppEngine 1.9.0 which otherwise causes
+        # HTTPS requests to go out as HTTP. (See Issue #356)
+        self._protocol = "https"
+
+    def set_cert(
+        self,
+        key_file=None,
+        cert_file=None,
+        cert_reqs=None,
+        key_password=None,
+        ca_certs=None,
+        assert_hostname=None,
+        assert_fingerprint=None,
+        ca_cert_dir=None,
+        ca_cert_data=None,
+    ):
+        """
+        This method should only be called once, before the connection is used.
+        """
+        # If cert_reqs is not provided we'll assume CERT_REQUIRED unless we also
+        # have an SSLContext object in which case we'll use its verify_mode.
+        if cert_reqs is None:
+            if self.ssl_context is not None:
+                cert_reqs = self.ssl_context.verify_mode
+            else:
+                cert_reqs = resolve_cert_reqs(None)
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+        self.ca_certs = ca_certs and os.path.expanduser(ca_certs)
+        self.ca_cert_dir = ca_cert_dir and os.path.expanduser(ca_cert_dir)
+        self.ca_cert_data = ca_cert_data
+
+    def connect(self):
+        # Add certificate verification
+        self.sock = conn = self._new_conn()
+        hostname = self.host
+        tls_in_tls = False
+
+        if self._is_using_tunnel():
+            if self.tls_in_tls_required:
+                self.sock = conn = self._connect_tls_proxy(hostname, conn)
+                tls_in_tls = True
+
+            # Calls self._set_hostport(), so self.host is
+            # self._tunnel_host below.
+            self._tunnel()
+            # Mark this connection as not reusable
+            self.auto_open = 0
+
+            # Override the host with the one we're requesting data from.
+            hostname = self._tunnel_host
+
+        server_hostname = hostname
+        if self.server_hostname is not None:
+            server_hostname = self.server_hostname
+
+        is_time_off = datetime.date.today() < RECENT_DATE
+        if is_time_off:
+            warnings.warn(
+                (
+                    "System time is way off (before {0}). This will probably "
+                    "lead to SSL verification errors"
+                ).format(RECENT_DATE),
+                SystemTimeWarning,
+            )
+
+        # Wrap socket using verification with the root certs in
+        # trusted_root_certs
+        default_ssl_context = False
+        if self.ssl_context is None:
+            default_ssl_context = True
+            self.ssl_context = create_urllib3_context(
+                ssl_version=resolve_ssl_version(self.ssl_version),
+                cert_reqs=resolve_cert_reqs(self.cert_reqs),
+            )
+
+        context = self.ssl_context
+        context.verify_mode = resolve_cert_reqs(self.cert_reqs)
+
+        # Try to load OS default certs if none are given.
+        # Works well on Windows (requires Python3.4+)
+        if (
+            not self.ca_certs
+            and not self.ca_cert_dir
+            and not self.ca_cert_data
+            and default_ssl_context
+            and hasattr(context, "load_default_certs")
+        ):
+            context.load_default_certs()
+
+        self.sock = ssl_wrap_socket(
+            sock=conn,
+            keyfile=self.key_file,
+            certfile=self.cert_file,
+            key_password=self.key_password,
+            ca_certs=self.ca_certs,
+            ca_cert_dir=self.ca_cert_dir,
+            ca_cert_data=self.ca_cert_data,
+            server_hostname=server_hostname,
+            ssl_context=context,
+            tls_in_tls=tls_in_tls,
+        )
+
+        # If we're using all defaults and the connection
+        # is TLSv1 or TLSv1.1 we throw a DeprecationWarning
+        # for the host.
+        if (
+            default_ssl_context
+            and self.ssl_version is None
+            and hasattr(self.sock, "version")
+            and self.sock.version() in {"TLSv1", "TLSv1.1"}
+        ):
+            warnings.warn(
+                "Negotiating TLSv1/TLSv1.1 by default is deprecated "
+                "and will be disabled in urllib3 v2.0.0. Connecting to "
+                "'%s' with '%s' can be enabled by explicitly opting-in "
+                "with 'ssl_version'" % (self.host, self.sock.version()),
+                DeprecationWarning,
+            )
+
+        if self.assert_fingerprint:
+            assert_fingerprint(
+                self.sock.getpeercert(binary_form=True), self.assert_fingerprint
+            )
+        elif (
+            context.verify_mode != ssl.CERT_NONE
+            and not getattr(context, "check_hostname", False)
+            and self.assert_hostname is not False
+        ):
+            # While urllib3 attempts to always turn off hostname matching from
+            # the TLS library, this cannot always be done. So we check whether
+            # the TLS Library still thinks it's matching hostnames.
+            cert = self.sock.getpeercert()
+            if not cert.get("subjectAltName", ()):
+                warnings.warn(
+                    (
+                        "Certificate for {0} has no `subjectAltName`, falling back to check for a "
+                        "`commonName` for now. This feature is being removed by major browsers and "
+                        "deprecated by RFC 2818. (See https://github.com/urllib3/urllib3/issues/497 "
+                        "for details.)".format(hostname)
+                    ),
+                    SubjectAltNameWarning,
+                )
+            _match_hostname(cert, self.assert_hostname or server_hostname)
+
+        self.is_verified = (
+            context.verify_mode == ssl.CERT_REQUIRED
+            or self.assert_fingerprint is not None
+        )
+
+    def _connect_tls_proxy(self, hostname, conn):
+        """
+        Establish a TLS connection to the proxy using the provided SSL context.
+        """
+        proxy_config = self.proxy_config
+        ssl_context = proxy_config.ssl_context
+        if ssl_context:
+            # If the user provided a proxy context, we assume CA and client
+            # certificates have already been set
+            return ssl_wrap_socket(
+                sock=conn,
+                server_hostname=hostname,
+                ssl_context=ssl_context,
+            )
+
+        ssl_context = create_proxy_ssl_context(
+            self.ssl_version,
+            self.cert_reqs,
+            self.ca_certs,
+            self.ca_cert_dir,
+            self.ca_cert_data,
+        )
+
+        # If no cert was provided, use only the default options for server
+        # certificate validation
+        socket = ssl_wrap_socket(
+            sock=conn,
+            ca_certs=self.ca_certs,
+            ca_cert_dir=self.ca_cert_dir,
+            ca_cert_data=self.ca_cert_data,
+            server_hostname=hostname,
+            ssl_context=ssl_context,
+        )
+
+        if ssl_context.verify_mode != ssl.CERT_NONE and not getattr(
+            ssl_context, "check_hostname", False
+        ):
+            # While urllib3 attempts to always turn off hostname matching from
+            # the TLS library, this cannot always be done. So we check whether
+            # the TLS Library still thinks it's matching hostnames.
+            cert = socket.getpeercert()
+            if not cert.get("subjectAltName", ()):
+                warnings.warn(
+                    (
+                        "Certificate for {0} has no `subjectAltName`, falling back to check for a "
+                        "`commonName` for now. This feature is being removed by major browsers and "
+                        "deprecated by RFC 2818. (See https://github.com/urllib3/urllib3/issues/497 "
+                        "for details.)".format(hostname)
+                    ),
+                    SubjectAltNameWarning,
+                )
+            _match_hostname(cert, hostname)
+
+        self.proxy_is_verified = ssl_context.verify_mode == ssl.CERT_REQUIRED
+        return socket
+
+
+def _match_hostname(cert, asserted_hostname):
+    # Our upstream implementation of ssl.match_hostname()
+    # only applies this normalization to IP addresses so it doesn't
+    # match DNS SANs so we do the same thing!
+    stripped_hostname = asserted_hostname.strip("u[]")
+    if is_ipaddress(stripped_hostname):
+        asserted_hostname = stripped_hostname
+
+    try:
+        match_hostname(cert, asserted_hostname)
+    except CertificateError as e:
+        log.warning(
+            "Certificate did not match expected hostname: %s. Certificate: %s",
+            asserted_hostname,
+            cert,
+        )
+        # Add cert to exception and reraise so client code can inspect
+        # the cert when catching the exception, if they want to
+        e._peer_cert = cert
+        raise
+
+
+def _get_default_user_agent():
+    return "python-urllib3/%s" % __version__
+
+
+class DummyConnection(object):
+    """Used to detect a failed ConnectionCls import."""
+
+    pass
+
+
+if not ssl:
+    HTTPSConnection = DummyConnection  # noqa: F811
+
+
+VerifiedHTTPSConnection = HTTPSConnection
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connectionpool.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connectionpool.py
new file mode 100644
index 0000000..96339e9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/connectionpool.py
@@ -0,0 +1,1110 @@
+from __future__ import absolute_import
+
+import errno
+import logging
+import re
+import socket
+import sys
+import warnings
+from socket import error as SocketError
+from socket import timeout as SocketTimeout
+
+from .connection import (
+    BaseSSLError,
+    BrokenPipeError,
+    DummyConnection,
+    HTTPConnection,
+    HTTPException,
+    HTTPSConnection,
+    VerifiedHTTPSConnection,
+    port_by_scheme,
+)
+from .exceptions import (
+    ClosedPoolError,
+    EmptyPoolError,
+    HeaderParsingError,
+    HostChangedError,
+    InsecureRequestWarning,
+    LocationValueError,
+    MaxRetryError,
+    NewConnectionError,
+    ProtocolError,
+    ProxyError,
+    ReadTimeoutError,
+    SSLError,
+    TimeoutError,
+)
+from .packages import six
+from .packages.six.moves import queue
+from .request import RequestMethods
+from .response import HTTPResponse
+from .util.connection import is_connection_dropped
+from .util.proxy import connection_requires_http_tunnel
+from .util.queue import LifoQueue
+from .util.request import set_file_position
+from .util.response import assert_header_parsing
+from .util.retry import Retry
+from .util.ssl_match_hostname import CertificateError
+from .util.timeout import Timeout
+from .util.url import Url, _encode_target
+from .util.url import _normalize_host as normalize_host
+from .util.url import get_host, parse_url
+
+xrange = six.moves.xrange
+
+log = logging.getLogger(__name__)
+
+_Default = object()
+
+
+# Pool objects
+class ConnectionPool(object):
+    """
+    Base class for all connection pools, such as
+    :class:`.HTTPConnectionPool` and :class:`.HTTPSConnectionPool`.
+
+    .. note::
+       ConnectionPool.urlopen() does not normalize or percent-encode target URIs
+       which is useful if your target server doesn't support percent-encoded
+       target URIs.
+    """
+
+    scheme = None
+    QueueCls = LifoQueue
+
+    def __init__(self, host, port=None):
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        self.host = _normalize_host(host, scheme=self.scheme)
+        self._proxy_host = host.lower()
+        self.port = port
+
+    def __str__(self):
+        return "%s(host=%r, port=%r)" % (type(self).__name__, self.host, self.port)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.close()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        pass
+
+
+# This is taken from http://hg.python.org/cpython/file/7aaba721ebc0/Lib/socket.py#l252
+_blocking_errnos = {errno.EAGAIN, errno.EWOULDBLOCK}
+
+
+class HTTPConnectionPool(ConnectionPool, RequestMethods):
+    """
+    Thread-safe connection pool for one host.
+
+    :param host:
+        Host used for this HTTP Connection (e.g. "localhost"), passed into
+        :class:`http.client.HTTPConnection`.
+
+    :param port:
+        Port used for this HTTP Connection (None is equivalent to 80), passed
+        into :class:`http.client.HTTPConnection`.
+
+    :param strict:
+        Causes BadStatusLine to be raised if the status line can't be parsed
+        as a valid HTTP/1.0 or 1.1 status line, passed into
+        :class:`http.client.HTTPConnection`.
+
+        .. note::
+           Only works in Python 2. This parameter is ignored in Python 3.
+
+    :param timeout:
+        Socket timeout in seconds for each individual connection. This can
+        be a float or integer, which sets the timeout for the HTTP request,
+        or an instance of :class:`urllib3.util.Timeout` which gives you more
+        fine-grained control over request timeouts. After the constructor has
+        been parsed, this is always a `urllib3.util.Timeout` object.
+
+    :param maxsize:
+        Number of connections to save that can be reused. More than 1 is useful
+        in multithreaded situations. If ``block`` is set to False, more
+        connections will be created but they will not be saved once they've
+        been used.
+
+    :param block:
+        If set to True, no more than ``maxsize`` connections will be used at
+        a time. When no free connections are available, the call will block
+        until a connection has been released. This is a useful side effect for
+        particular multithreaded situations where one does not want to use more
+        than maxsize connections per host to prevent flooding.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param retries:
+        Retry configuration to use by default with requests in this pool.
+
+    :param _proxy:
+        Parsed proxy URL, should not be used directly, instead, see
+        :class:`urllib3.ProxyManager`
+
+    :param _proxy_headers:
+        A dictionary with proxy headers, should not be used directly,
+        instead, see :class:`urllib3.ProxyManager`
+
+    :param \\**conn_kw:
+        Additional parameters are used to create fresh :class:`urllib3.connection.HTTPConnection`,
+        :class:`urllib3.connection.HTTPSConnection` instances.
+    """
+
+    scheme = "http"
+    ConnectionCls = HTTPConnection
+    ResponseCls = HTTPResponse
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        strict=False,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        maxsize=1,
+        block=False,
+        headers=None,
+        retries=None,
+        _proxy=None,
+        _proxy_headers=None,
+        _proxy_config=None,
+        **conn_kw
+    ):
+        ConnectionPool.__init__(self, host, port)
+        RequestMethods.__init__(self, headers)
+
+        self.strict = strict
+
+        if not isinstance(timeout, Timeout):
+            timeout = Timeout.from_float(timeout)
+
+        if retries is None:
+            retries = Retry.DEFAULT
+
+        self.timeout = timeout
+        self.retries = retries
+
+        self.pool = self.QueueCls(maxsize)
+        self.block = block
+
+        self.proxy = _proxy
+        self.proxy_headers = _proxy_headers or {}
+        self.proxy_config = _proxy_config
+
+        # Fill the queue up so that doing get() on it will block properly
+        for _ in xrange(maxsize):
+            self.pool.put(None)
+
+        # These are mostly for testing and debugging purposes.
+        self.num_connections = 0
+        self.num_requests = 0
+        self.conn_kw = conn_kw
+
+        if self.proxy:
+            # Enable Nagle's algorithm for proxies, to avoid packet fragmentation.
+            # We cannot know if the user has added default socket options, so we cannot replace the
+            # list.
+            self.conn_kw.setdefault("socket_options", [])
+
+            self.conn_kw["proxy"] = self.proxy
+            self.conn_kw["proxy_config"] = self.proxy_config
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`HTTPConnection`.
+        """
+        self.num_connections += 1
+        log.debug(
+            "Starting new HTTP connection (%d): %s:%s",
+            self.num_connections,
+            self.host,
+            self.port or "80",
+        )
+
+        conn = self.ConnectionCls(
+            host=self.host,
+            port=self.port,
+            timeout=self.timeout.connect_timeout,
+            strict=self.strict,
+            **self.conn_kw
+        )
+        return conn
+
+    def _get_conn(self, timeout=None):
+        """
+        Get a connection. Will return a pooled connection if one is available.
+
+        If no connections are available and :prop:`.block` is ``False``, then a
+        fresh connection is returned.
+
+        :param timeout:
+            Seconds to wait before giving up and raising
+            :class:`urllib3.exceptions.EmptyPoolError` if the pool is empty and
+            :prop:`.block` is ``True``.
+        """
+        conn = None
+        try:
+            conn = self.pool.get(block=self.block, timeout=timeout)
+
+        except AttributeError:  # self.pool is None
+            raise ClosedPoolError(self, "Pool is closed.")
+
+        except queue.Empty:
+            if self.block:
+                raise EmptyPoolError(
+                    self,
+                    "Pool reached maximum size and no more connections are allowed.",
+                )
+            pass  # Oh well, we'll create a new connection then
+
+        # If this is a persistent connection, check if it got disconnected
+        if conn and is_connection_dropped(conn):
+            log.debug("Resetting dropped connection: %s", self.host)
+            conn.close()
+            if getattr(conn, "auto_open", 1) == 0:
+                # This is a proxied connection that has been mutated by
+                # http.client._tunnel() and cannot be reused (since it would
+                # attempt to bypass the proxy)
+                conn = None
+
+        return conn or self._new_conn()
+
+    def _put_conn(self, conn):
+        """
+        Put a connection back into the pool.
+
+        :param conn:
+            Connection object for the current host and port as returned by
+            :meth:`._new_conn` or :meth:`._get_conn`.
+
+        If the pool is already full, the connection is closed and discarded
+        because we exceeded maxsize. If connections are discarded frequently,
+        then maxsize should be increased.
+
+        If the pool is closed, then the connection will be closed and discarded.
+        """
+        try:
+            self.pool.put(conn, block=False)
+            return  # Everything is dandy, done.
+        except AttributeError:
+            # self.pool is None.
+            pass
+        except queue.Full:
+            # This should never happen if self.block == True
+            log.warning(
+                "Connection pool is full, discarding connection: %s. Connection pool size: %s",
+                self.host,
+                self.pool.qsize(),
+            )
+        # Connection never got put back into the pool, close it.
+        if conn:
+            conn.close()
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        pass
+
+    def _prepare_proxy(self, conn):
+        # Nothing to do for HTTP connections.
+        pass
+
+    def _get_timeout(self, timeout):
+        """Helper that always returns a :class:`urllib3.util.Timeout`"""
+        if timeout is _Default:
+            return self.timeout.clone()
+
+        if isinstance(timeout, Timeout):
+            return timeout.clone()
+        else:
+            # User passed us an int/float. This is for backwards compatibility,
+            # can be removed later
+            return Timeout.from_float(timeout)
+
+    def _raise_timeout(self, err, url, timeout_value):
+        """Is the error actually a timeout? Will raise a ReadTimeout or pass"""
+
+        if isinstance(err, SocketTimeout):
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+        # See the above comment about EAGAIN in Python 3. In Python 2 we have
+        # to specifically catch it and throw the timeout error
+        if hasattr(err, "errno") and err.errno in _blocking_errnos:
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+        # Catch possible read timeouts thrown as SSL errors. If not the
+        # case, rethrow the original. We need to do this because of:
+        # http://bugs.python.org/issue10272
+        if "timed out" in str(err) or "did not complete (read)" in str(
+            err
+        ):  # Python < 2.7.4
+            raise ReadTimeoutError(
+                self, url, "Read timed out. (read timeout=%s)" % timeout_value
+            )
+
+    def _make_request(
+        self, conn, method, url, timeout=_Default, chunked=False, **httplib_request_kw
+    ):
+        """
+        Perform a request on a given urllib connection object taken from our
+        pool.
+
+        :param conn:
+            a connection from one of our connection pools
+
+        :param timeout:
+            Socket timeout in seconds for the request. This can be a
+            float or integer, which will set the same timeout value for
+            the socket connect and the socket read, or an instance of
+            :class:`urllib3.util.Timeout`, which gives you more fine-grained
+            control over your timeouts.
+        """
+        self.num_requests += 1
+
+        timeout_obj = self._get_timeout(timeout)
+        timeout_obj.start_connect()
+        conn.timeout = timeout_obj.connect_timeout
+
+        # Trigger any extra validation we need to do.
+        try:
+            self._validate_conn(conn)
+        except (SocketTimeout, BaseSSLError) as e:
+            # Py2 raises this as a BaseSSLError, Py3 raises it as socket timeout.
+            self._raise_timeout(err=e, url=url, timeout_value=conn.timeout)
+            raise
+
+        # conn.request() calls http.client.*.request, not the method in
+        # urllib3.request. It also calls makefile (recv) on the socket.
+        try:
+            if chunked:
+                conn.request_chunked(method, url, **httplib_request_kw)
+            else:
+                conn.request(method, url, **httplib_request_kw)
+
+        # We are swallowing BrokenPipeError (errno.EPIPE) since the server is
+        # legitimately able to close the connection after sending a valid response.
+        # With this behaviour, the received response is still readable.
+        except BrokenPipeError:
+            # Python 3
+            pass
+        except IOError as e:
+            # Python 2 and macOS/Linux
+            # EPIPE and ESHUTDOWN are BrokenPipeError on Python 2, and EPROTOTYPE is needed on macOS
+            # https://erickt.github.io/blog/2014/11/19/adventures-in-debugging-a-potential-osx-kernel-bug/
+            if e.errno not in {
+                errno.EPIPE,
+                errno.ESHUTDOWN,
+                errno.EPROTOTYPE,
+            }:
+                raise
+
+        # Reset the timeout for the recv() on the socket
+        read_timeout = timeout_obj.read_timeout
+
+        # App Engine doesn't have a sock attr
+        if getattr(conn, "sock", None):
+            # In Python 3 socket.py will catch EAGAIN and return None when you
+            # try and read into the file pointer created by http.client, which
+            # instead raises a BadStatusLine exception. Instead of catching
+            # the exception and assuming all BadStatusLine exceptions are read
+            # timeouts, check for a zero timeout before making the request.
+            if read_timeout == 0:
+                raise ReadTimeoutError(
+                    self, url, "Read timed out. (read timeout=%s)" % read_timeout
+                )
+            if read_timeout is Timeout.DEFAULT_TIMEOUT:
+                conn.sock.settimeout(socket.getdefaulttimeout())
+            else:  # None or a value
+                conn.sock.settimeout(read_timeout)
+
+        # Receive the response from the server
+        try:
+            try:
+                # Python 2.7, use buffering of HTTP responses
+                httplib_response = conn.getresponse(buffering=True)
+            except TypeError:
+                # Python 3
+                try:
+                    httplib_response = conn.getresponse()
+                except BaseException as e:
+                    # Remove the TypeError from the exception chain in
+                    # Python 3 (including for exceptions like SystemExit).
+                    # Otherwise it looks like a bug in the code.
+                    six.raise_from(e, None)
+        except (SocketTimeout, BaseSSLError, SocketError) as e:
+            self._raise_timeout(err=e, url=url, timeout_value=read_timeout)
+            raise
+
+        # AppEngine doesn't have a version attr.
+        http_version = getattr(conn, "_http_vsn_str", "HTTP/?")
+        log.debug(
+            '%s://%s:%s "%s %s %s" %s %s',
+            self.scheme,
+            self.host,
+            self.port,
+            method,
+            url,
+            http_version,
+            httplib_response.status,
+            httplib_response.length,
+        )
+
+        try:
+            assert_header_parsing(httplib_response.msg)
+        except (HeaderParsingError, TypeError) as hpe:  # Platform-specific: Python 3
+            log.warning(
+                "Failed to parse headers (url=%s): %s",
+                self._absolute_url(url),
+                hpe,
+                exc_info=True,
+            )
+
+        return httplib_response
+
+    def _absolute_url(self, path):
+        return Url(scheme=self.scheme, host=self.host, port=self.port, path=path).url
+
+    def close(self):
+        """
+        Close all pooled connections and disable the pool.
+        """
+        if self.pool is None:
+            return
+        # Disable access to the pool
+        old_pool, self.pool = self.pool, None
+
+        try:
+            while True:
+                conn = old_pool.get(block=False)
+                if conn:
+                    conn.close()
+
+        except queue.Empty:
+            pass  # Done.
+
+    def is_same_host(self, url):
+        """
+        Check if the given ``url`` is a member of the same host as this
+        connection pool.
+        """
+        if url.startswith("/"):
+            return True
+
+        # TODO: Add optional support for socket.gethostbyname checking.
+        scheme, host, port = get_host(url)
+        if host is not None:
+            host = _normalize_host(host, scheme=scheme)
+
+        # Use explicit default port for comparison when none is given
+        if self.port and not port:
+            port = port_by_scheme.get(scheme)
+        elif not self.port and port == port_by_scheme.get(scheme):
+            port = None
+
+        return (scheme, host, port) == (self.scheme, self.host, self.port)
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=None,
+        redirect=True,
+        assert_same_host=True,
+        timeout=_Default,
+        pool_timeout=None,
+        release_conn=None,
+        chunked=False,
+        body_pos=None,
+        **response_kw
+    ):
+        """
+        Get a connection from the pool and perform an HTTP request. This is the
+        lowest level call for making a request, so you'll need to specify all
+        the raw details.
+
+        .. note::
+
+           More commonly, it's appropriate to use a convenience method provided
+           by :class:`.RequestMethods`, such as :meth:`request`.
+
+        .. note::
+
+           `release_conn` will only behave as expected if
+           `preload_content=False` because we want to make
+           `preload_content=False` the default behaviour someday soon without
+           breaking backwards compatibility.
+
+        :param method:
+            HTTP request method (such as GET, POST, PUT, etc.)
+
+        :param url:
+            The URL to perform the request on.
+
+        :param body:
+            Data to send in the request body, either :class:`str`, :class:`bytes`,
+            an iterable of :class:`str`/:class:`bytes`, or a file-like object.
+
+        :param headers:
+            Dictionary of custom headers to send, such as User-Agent,
+            If-None-Match, etc. If None, pool headers are used. If provided,
+            these headers completely replace any pool-specific headers.
+
+        :param retries:
+            Configure the number of retries to allow before raising a
+            :class:`~urllib3.exceptions.MaxRetryError` exception.
+
+            Pass ``None`` to retry until you receive a response. Pass a
+            :class:`~urllib3.util.retry.Retry` object for fine-grained control
+            over different types of retries.
+            Pass an integer number to retry connection errors that many times,
+            but no other types of errors. Pass zero to never retry.
+
+            If ``False``, then retries are disabled and any exception is raised
+            immediately. Also, instead of raising a MaxRetryError on redirects,
+            the redirect response will be returned.
+
+        :type retries: :class:`~urllib3.util.retry.Retry`, False, or an int.
+
+        :param redirect:
+            If True, automatically handle redirects (status codes 301, 302,
+            303, 307, 308). Each redirect counts as a retry. Disabling retries
+            will disable redirect, too.
+
+        :param assert_same_host:
+            If ``True``, will make sure that the host of the pool requests is
+            consistent else will raise HostChangedError. When ``False``, you can
+            use the pool on an HTTP proxy and request foreign hosts.
+
+        :param timeout:
+            If specified, overrides the default timeout for this one
+            request. It may be a float (in seconds) or an instance of
+            :class:`urllib3.util.Timeout`.
+
+        :param pool_timeout:
+            If set and the pool is set to block=True, then this method will
+            block for ``pool_timeout`` seconds and raise EmptyPoolError if no
+            connection is available within the time period.
+
+        :param release_conn:
+            If False, then the urlopen call will not release the connection
+            back into the pool once a response is received (but will release if
+            you read the entire contents of the response such as when
+            `preload_content=True`). This is useful if you're not preloading
+            the response's content immediately. You will need to call
+            ``r.release_conn()`` on the response ``r`` to return the connection
+            back into the pool. If None, it takes the value of
+            ``response_kw.get('preload_content', True)``.
+
+        :param chunked:
+            If True, urllib3 will send the body using chunked transfer
+            encoding. Otherwise, urllib3 will send the body using the standard
+            content-length form. Defaults to False.
+
+        :param int body_pos:
+            Position to seek to in file-like body in the event of a retry or
+            redirect. Typically this won't need to be set because urllib3 will
+            auto-populate the value when needed.
+
+        :param \\**response_kw:
+            Additional parameters are passed to
+            :meth:`urllib3.response.HTTPResponse.from_httplib`
+        """
+
+        parsed_url = parse_url(url)
+        destination_scheme = parsed_url.scheme
+
+        if headers is None:
+            headers = self.headers
+
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
+
+        if release_conn is None:
+            release_conn = response_kw.get("preload_content", True)
+
+        # Check host
+        if assert_same_host and not self.is_same_host(url):
+            raise HostChangedError(self, url, retries)
+
+        # Ensure that the URL we're connecting to is properly encoded
+        if url.startswith("/"):
+            url = six.ensure_str(_encode_target(url))
+        else:
+            url = six.ensure_str(parsed_url.url)
+
+        conn = None
+
+        # Track whether `conn` needs to be released before
+        # returning/raising/recursing. Update this variable if necessary, and
+        # leave `release_conn` constant throughout the function. That way, if
+        # the function recurses, the original value of `release_conn` will be
+        # passed down into the recursive call, and its value will be respected.
+        #
+        # See issue #651 [1] for details.
+        #
+        # [1] <https://github.com/urllib3/urllib3/issues/651>
+        release_this_conn = release_conn
+
+        http_tunnel_required = connection_requires_http_tunnel(
+            self.proxy, self.proxy_config, destination_scheme
+        )
+
+        # Merge the proxy headers. Only done when not using HTTP CONNECT. We
+        # have to copy the headers dict so we can safely change it without those
+        # changes being reflected in anyone else's copy.
+        if not http_tunnel_required:
+            headers = headers.copy()
+            headers.update(self.proxy_headers)
+
+        # Must keep the exception bound to a separate variable or else Python 3
+        # complains about UnboundLocalError.
+        err = None
+
+        # Keep track of whether we cleanly exited the except block. This
+        # ensures we do proper cleanup in finally.
+        clean_exit = False
+
+        # Rewind body position, if needed. Record current position
+        # for future rewinds in the event of a redirect/retry.
+        body_pos = set_file_position(body, body_pos)
+
+        try:
+            # Request a connection from the queue.
+            timeout_obj = self._get_timeout(timeout)
+            conn = self._get_conn(timeout=pool_timeout)
+
+            conn.timeout = timeout_obj.connect_timeout
+
+            is_new_proxy_conn = self.proxy is not None and not getattr(
+                conn, "sock", None
+            )
+            if is_new_proxy_conn and http_tunnel_required:
+                self._prepare_proxy(conn)
+
+            # Make the request on the httplib connection object.
+            httplib_response = self._make_request(
+                conn,
+                method,
+                url,
+                timeout=timeout_obj,
+                body=body,
+                headers=headers,
+                chunked=chunked,
+            )
+
+            # If we're going to release the connection in ``finally:``, then
+            # the response doesn't need to know about the connection. Otherwise
+            # it will also try to release it and we'll have a double-release
+            # mess.
+            response_conn = conn if not release_conn else None
+
+            # Pass method to Response for length checking
+            response_kw["request_method"] = method
+
+            # Import httplib's response into our own wrapper object
+            response = self.ResponseCls.from_httplib(
+                httplib_response,
+                pool=self,
+                connection=response_conn,
+                retries=retries,
+                **response_kw
+            )
+
+            # Everything went great!
+            clean_exit = True
+
+        except EmptyPoolError:
+            # Didn't get a connection from the pool, no need to clean up
+            clean_exit = True
+            release_this_conn = False
+            raise
+
+        except (
+            TimeoutError,
+            HTTPException,
+            SocketError,
+            ProtocolError,
+            BaseSSLError,
+            SSLError,
+            CertificateError,
+        ) as e:
+            # Discard the connection for these exceptions. It will be
+            # replaced during the next _get_conn() call.
+            clean_exit = False
+
+            def _is_ssl_error_message_from_http_proxy(ssl_error):
+                # We're trying to detect the message 'WRONG_VERSION_NUMBER' but
+                # SSLErrors are kinda all over the place when it comes to the message,
+                # so we try to cover our bases here!
+                message = " ".join(re.split("[^a-z]", str(ssl_error).lower()))
+                return (
+                    "wrong version number" in message or "unknown protocol" in message
+                )
+
+            # Try to detect a common user error with proxies which is to
+            # set an HTTP proxy to be HTTPS when it should be 'http://'
+            # (ie {'http': 'http://proxy', 'https': 'https://proxy'})
+            # Instead we add a nice error message and point to a URL.
+            if (
+                isinstance(e, BaseSSLError)
+                and self.proxy
+                and _is_ssl_error_message_from_http_proxy(e)
+                and conn.proxy
+                and conn.proxy.scheme == "https"
+            ):
+                e = ProxyError(
+                    "Your proxy appears to only use HTTP and not HTTPS, "
+                    "try changing your proxy URL to be HTTP. See: "
+                    "https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html"
+                    "#https-proxy-error-http-proxy",
+                    SSLError(e),
+                )
+            elif isinstance(e, (BaseSSLError, CertificateError)):
+                e = SSLError(e)
+            elif isinstance(e, (SocketError, NewConnectionError)) and self.proxy:
+                e = ProxyError("Cannot connect to proxy.", e)
+            elif isinstance(e, (SocketError, HTTPException)):
+                e = ProtocolError("Connection aborted.", e)
+
+            retries = retries.increment(
+                method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
+            )
+            retries.sleep()
+
+            # Keep track of the error for the retry warning.
+            err = e
+
+        finally:
+            if not clean_exit:
+                # We hit some kind of exception, handled or otherwise. We need
+                # to throw the connection away unless explicitly told not to.
+                # Close the connection, set the variable to None, and make sure
+                # we put the None back in the pool to avoid leaking it.
+                conn = conn and conn.close()
+                release_this_conn = True
+
+            if release_this_conn:
+                # Put the connection back to be reused. If the connection is
+                # expired then it will be None, which will get replaced with a
+                # fresh connection during _get_conn.
+                self._put_conn(conn)
+
+        if not conn:
+            # Try again
+            log.warning(
+                "Retrying (%r) after connection broken by '%r': %s", retries, err, url
+            )
+            return self.urlopen(
+                method,
+                url,
+                body,
+                headers,
+                retries,
+                redirect,
+                assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        # Handle redirect?
+        redirect_location = redirect and response.get_redirect_location()
+        if redirect_location:
+            if response.status == 303:
+                method = "GET"
+
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_redirect:
+                    response.drain_conn()
+                    raise
+                return response
+
+            response.drain_conn()
+            retries.sleep_for_retry(response)
+            log.debug("Redirecting %s -> %s", url, redirect_location)
+            return self.urlopen(
+                method,
+                redirect_location,
+                body,
+                headers,
+                retries=retries,
+                redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(response.getheader("Retry-After"))
+        if retries.is_retry(method, response.status, has_retry_after):
+            try:
+                retries = retries.increment(method, url, response=response, _pool=self)
+            except MaxRetryError:
+                if retries.raise_on_status:
+                    response.drain_conn()
+                    raise
+                return response
+
+            response.drain_conn()
+            retries.sleep(response)
+            log.debug("Retry: %s", url)
+            return self.urlopen(
+                method,
+                url,
+                body,
+                headers,
+                retries=retries,
+                redirect=redirect,
+                assert_same_host=assert_same_host,
+                timeout=timeout,
+                pool_timeout=pool_timeout,
+                release_conn=release_conn,
+                chunked=chunked,
+                body_pos=body_pos,
+                **response_kw
+            )
+
+        return response
+
+
+class HTTPSConnectionPool(HTTPConnectionPool):
+    """
+    Same as :class:`.HTTPConnectionPool`, but HTTPS.
+
+    :class:`.HTTPSConnection` uses one of ``assert_fingerprint``,
+    ``assert_hostname`` and ``host`` in this order to verify connections.
+    If ``assert_hostname`` is False, no verification is done.
+
+    The ``key_file``, ``cert_file``, ``cert_reqs``, ``ca_certs``,
+    ``ca_cert_dir``, ``ssl_version``, ``key_password`` are only used if :mod:`ssl`
+    is available and are fed into :meth:`urllib3.util.ssl_wrap_socket` to upgrade
+    the connection socket into an SSL socket.
+    """
+
+    scheme = "https"
+    ConnectionCls = HTTPSConnection
+
+    def __init__(
+        self,
+        host,
+        port=None,
+        strict=False,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        maxsize=1,
+        block=False,
+        headers=None,
+        retries=None,
+        _proxy=None,
+        _proxy_headers=None,
+        key_file=None,
+        cert_file=None,
+        cert_reqs=None,
+        key_password=None,
+        ca_certs=None,
+        ssl_version=None,
+        assert_hostname=None,
+        assert_fingerprint=None,
+        ca_cert_dir=None,
+        **conn_kw
+    ):
+
+        HTTPConnectionPool.__init__(
+            self,
+            host,
+            port,
+            strict,
+            timeout,
+            maxsize,
+            block,
+            headers,
+            retries,
+            _proxy,
+            _proxy_headers,
+            **conn_kw
+        )
+
+        self.key_file = key_file
+        self.cert_file = cert_file
+        self.cert_reqs = cert_reqs
+        self.key_password = key_password
+        self.ca_certs = ca_certs
+        self.ca_cert_dir = ca_cert_dir
+        self.ssl_version = ssl_version
+        self.assert_hostname = assert_hostname
+        self.assert_fingerprint = assert_fingerprint
+
+    def _prepare_conn(self, conn):
+        """
+        Prepare the ``connection`` for :meth:`urllib3.util.ssl_wrap_socket`
+        and establish the tunnel if proxy is used.
+        """
+
+        if isinstance(conn, VerifiedHTTPSConnection):
+            conn.set_cert(
+                key_file=self.key_file,
+                key_password=self.key_password,
+                cert_file=self.cert_file,
+                cert_reqs=self.cert_reqs,
+                ca_certs=self.ca_certs,
+                ca_cert_dir=self.ca_cert_dir,
+                assert_hostname=self.assert_hostname,
+                assert_fingerprint=self.assert_fingerprint,
+            )
+            conn.ssl_version = self.ssl_version
+        return conn
+
+    def _prepare_proxy(self, conn):
+        """
+        Establishes a tunnel connection through HTTP CONNECT.
+
+        Tunnel connection is established early because otherwise httplib would
+        improperly set Host: header to proxy's IP:port.
+        """
+
+        conn.set_tunnel(self._proxy_host, self.port, self.proxy_headers)
+
+        if self.proxy.scheme == "https":
+            conn.tls_in_tls_required = True
+
+        conn.connect()
+
+    def _new_conn(self):
+        """
+        Return a fresh :class:`http.client.HTTPSConnection`.
+        """
+        self.num_connections += 1
+        log.debug(
+            "Starting new HTTPS connection (%d): %s:%s",
+            self.num_connections,
+            self.host,
+            self.port or "443",
+        )
+
+        if not self.ConnectionCls or self.ConnectionCls is DummyConnection:
+            raise SSLError(
+                "Can't connect to HTTPS URL because the SSL module is not available."
+            )
+
+        actual_host = self.host
+        actual_port = self.port
+        if self.proxy is not None:
+            actual_host = self.proxy.host
+            actual_port = self.proxy.port
+
+        conn = self.ConnectionCls(
+            host=actual_host,
+            port=actual_port,
+            timeout=self.timeout.connect_timeout,
+            strict=self.strict,
+            cert_file=self.cert_file,
+            key_file=self.key_file,
+            key_password=self.key_password,
+            **self.conn_kw
+        )
+
+        return self._prepare_conn(conn)
+
+    def _validate_conn(self, conn):
+        """
+        Called right before a request is made, after the socket is created.
+        """
+        super(HTTPSConnectionPool, self)._validate_conn(conn)
+
+        # Force connect early to allow us to validate the connection.
+        if not getattr(conn, "sock", None):  # AppEngine might not have  `.sock`
+            conn.connect()
+
+        if not conn.is_verified:
+            warnings.warn(
+                (
+                    "Unverified HTTPS request is being made to host '%s'. "
+                    "Adding certificate verification is strongly advised. See: "
+                    "https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html"
+                    "#ssl-warnings" % conn.host
+                ),
+                InsecureRequestWarning,
+            )
+
+        if getattr(conn, "proxy_is_verified", None) is False:
+            warnings.warn(
+                (
+                    "Unverified HTTPS connection done to an HTTPS proxy. "
+                    "Adding certificate verification is strongly advised. See: "
+                    "https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html"
+                    "#ssl-warnings"
+                ),
+                InsecureRequestWarning,
+            )
+
+
+def connection_from_url(url, **kw):
+    """
+    Given a url, return an :class:`.ConnectionPool` instance of its host.
+
+    This is a shortcut for not having to parse out the scheme, host, and port
+    of the url before creating an :class:`.ConnectionPool` instance.
+
+    :param url:
+        Absolute URL string that must include the scheme. Port is optional.
+
+    :param \\**kw:
+        Passes additional parameters to the constructor of the appropriate
+        :class:`.ConnectionPool`. Useful for specifying things like
+        timeout, maxsize, headers, etc.
+
+    Example::
+
+        >>> conn = connection_from_url('http://google.com/')
+        >>> r = conn.request('GET', '/')
+    """
+    scheme, host, port = get_host(url)
+    port = port or port_by_scheme.get(scheme, 80)
+    if scheme == "https":
+        return HTTPSConnectionPool(host, port=port, **kw)
+    else:
+        return HTTPConnectionPool(host, port=port, **kw)
+
+
+def _normalize_host(host, scheme):
+    """
+    Normalize hosts for comparisons and use with sockets.
+    """
+
+    host = normalize_host(host, scheme)
+
+    # httplib doesn't like it when we include brackets in IPv6 addresses
+    # Specifically, if we include brackets but also pass the port then
+    # httplib crazily doubles up the square brackets on the Host header.
+    # Instead, we need to make sure we never pass ``None`` as the port.
+    # However, for backward compatibility reasons we can't actually
+    # *assert* that.  See http://bugs.python.org/issue28539
+    if host.startswith("[") and host.endswith("]"):
+        host = host[1:-1]
+    return host
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new file mode 100644
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--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/_appengine_environ.py
@@ -0,0 +1,36 @@
+"""
+This module provides means to detect the App Engine environment.
+"""
+
+import os
+
+
+def is_appengine():
+    return is_local_appengine() or is_prod_appengine()
+
+
+def is_appengine_sandbox():
+    """Reports if the app is running in the first generation sandbox.
+
+    The second generation runtimes are technically still in a sandbox, but it
+    is much less restrictive, so generally you shouldn't need to check for it.
+    see https://cloud.google.com/appengine/docs/standard/runtimes
+    """
+    return is_appengine() and os.environ["APPENGINE_RUNTIME"] == "python27"
+
+
+def is_local_appengine():
+    return "APPENGINE_RUNTIME" in os.environ and os.environ.get(
+        "SERVER_SOFTWARE", ""
+    ).startswith("Development/")
+
+
+def is_prod_appengine():
+    return "APPENGINE_RUNTIME" in os.environ and os.environ.get(
+        "SERVER_SOFTWARE", ""
+    ).startswith("Google App Engine/")
+
+
+def is_prod_appengine_mvms():
+    """Deprecated."""
+    return False
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new file mode 100644
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--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/_securetransport/bindings.py
@@ -0,0 +1,519 @@
+"""
+This module uses ctypes to bind a whole bunch of functions and constants from
+SecureTransport. The goal here is to provide the low-level API to
+SecureTransport. These are essentially the C-level functions and constants, and
+they're pretty gross to work with.
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import platform
+from ctypes import (
+    CDLL,
+    CFUNCTYPE,
+    POINTER,
+    c_bool,
+    c_byte,
+    c_char_p,
+    c_int32,
+    c_long,
+    c_size_t,
+    c_uint32,
+    c_ulong,
+    c_void_p,
+)
+from ctypes.util import find_library
+
+from ...packages.six import raise_from
+
+if platform.system() != "Darwin":
+    raise ImportError("Only macOS is supported")
+
+version = platform.mac_ver()[0]
+version_info = tuple(map(int, version.split(".")))
+if version_info < (10, 8):
+    raise OSError(
+        "Only OS X 10.8 and newer are supported, not %s.%s"
+        % (version_info[0], version_info[1])
+    )
+
+
+def load_cdll(name, macos10_16_path):
+    """Loads a CDLL by name, falling back to known path on 10.16+"""
+    try:
+        # Big Sur is technically 11 but we use 10.16 due to the Big Sur
+        # beta being labeled as 10.16.
+        if version_info >= (10, 16):
+            path = macos10_16_path
+        else:
+            path = find_library(name)
+        if not path:
+            raise OSError  # Caught and reraised as 'ImportError'
+        return CDLL(path, use_errno=True)
+    except OSError:
+        raise_from(ImportError("The library %s failed to load" % name), None)
+
+
+Security = load_cdll(
+    "Security", "/System/Library/Frameworks/Security.framework/Security"
+)
+CoreFoundation = load_cdll(
+    "CoreFoundation",
+    "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation",
+)
+
+
+Boolean = c_bool
+CFIndex = c_long
+CFStringEncoding = c_uint32
+CFData = c_void_p
+CFString = c_void_p
+CFArray = c_void_p
+CFMutableArray = c_void_p
+CFDictionary = c_void_p
+CFError = c_void_p
+CFType = c_void_p
+CFTypeID = c_ulong
+
+CFTypeRef = POINTER(CFType)
+CFAllocatorRef = c_void_p
+
+OSStatus = c_int32
+
+CFDataRef = POINTER(CFData)
+CFStringRef = POINTER(CFString)
+CFArrayRef = POINTER(CFArray)
+CFMutableArrayRef = POINTER(CFMutableArray)
+CFDictionaryRef = POINTER(CFDictionary)
+CFArrayCallBacks = c_void_p
+CFDictionaryKeyCallBacks = c_void_p
+CFDictionaryValueCallBacks = c_void_p
+
+SecCertificateRef = POINTER(c_void_p)
+SecExternalFormat = c_uint32
+SecExternalItemType = c_uint32
+SecIdentityRef = POINTER(c_void_p)
+SecItemImportExportFlags = c_uint32
+SecItemImportExportKeyParameters = c_void_p
+SecKeychainRef = POINTER(c_void_p)
+SSLProtocol = c_uint32
+SSLCipherSuite = c_uint32
+SSLContextRef = POINTER(c_void_p)
+SecTrustRef = POINTER(c_void_p)
+SSLConnectionRef = c_uint32
+SecTrustResultType = c_uint32
+SecTrustOptionFlags = c_uint32
+SSLProtocolSide = c_uint32
+SSLConnectionType = c_uint32
+SSLSessionOption = c_uint32
+
+
+try:
+    Security.SecItemImport.argtypes = [
+        CFDataRef,
+        CFStringRef,
+        POINTER(SecExternalFormat),
+        POINTER(SecExternalItemType),
+        SecItemImportExportFlags,
+        POINTER(SecItemImportExportKeyParameters),
+        SecKeychainRef,
+        POINTER(CFArrayRef),
+    ]
+    Security.SecItemImport.restype = OSStatus
+
+    Security.SecCertificateGetTypeID.argtypes = []
+    Security.SecCertificateGetTypeID.restype = CFTypeID
+
+    Security.SecIdentityGetTypeID.argtypes = []
+    Security.SecIdentityGetTypeID.restype = CFTypeID
+
+    Security.SecKeyGetTypeID.argtypes = []
+    Security.SecKeyGetTypeID.restype = CFTypeID
+
+    Security.SecCertificateCreateWithData.argtypes = [CFAllocatorRef, CFDataRef]
+    Security.SecCertificateCreateWithData.restype = SecCertificateRef
+
+    Security.SecCertificateCopyData.argtypes = [SecCertificateRef]
+    Security.SecCertificateCopyData.restype = CFDataRef
+
+    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SecIdentityCreateWithCertificate.argtypes = [
+        CFTypeRef,
+        SecCertificateRef,
+        POINTER(SecIdentityRef),
+    ]
+    Security.SecIdentityCreateWithCertificate.restype = OSStatus
+
+    Security.SecKeychainCreate.argtypes = [
+        c_char_p,
+        c_uint32,
+        c_void_p,
+        Boolean,
+        c_void_p,
+        POINTER(SecKeychainRef),
+    ]
+    Security.SecKeychainCreate.restype = OSStatus
+
+    Security.SecKeychainDelete.argtypes = [SecKeychainRef]
+    Security.SecKeychainDelete.restype = OSStatus
+
+    Security.SecPKCS12Import.argtypes = [
+        CFDataRef,
+        CFDictionaryRef,
+        POINTER(CFArrayRef),
+    ]
+    Security.SecPKCS12Import.restype = OSStatus
+
+    SSLReadFunc = CFUNCTYPE(OSStatus, SSLConnectionRef, c_void_p, POINTER(c_size_t))
+    SSLWriteFunc = CFUNCTYPE(
+        OSStatus, SSLConnectionRef, POINTER(c_byte), POINTER(c_size_t)
+    )
+
+    Security.SSLSetIOFuncs.argtypes = [SSLContextRef, SSLReadFunc, SSLWriteFunc]
+    Security.SSLSetIOFuncs.restype = OSStatus
+
+    Security.SSLSetPeerID.argtypes = [SSLContextRef, c_char_p, c_size_t]
+    Security.SSLSetPeerID.restype = OSStatus
+
+    Security.SSLSetCertificate.argtypes = [SSLContextRef, CFArrayRef]
+    Security.SSLSetCertificate.restype = OSStatus
+
+    Security.SSLSetCertificateAuthorities.argtypes = [SSLContextRef, CFTypeRef, Boolean]
+    Security.SSLSetCertificateAuthorities.restype = OSStatus
+
+    Security.SSLSetConnection.argtypes = [SSLContextRef, SSLConnectionRef]
+    Security.SSLSetConnection.restype = OSStatus
+
+    Security.SSLSetPeerDomainName.argtypes = [SSLContextRef, c_char_p, c_size_t]
+    Security.SSLSetPeerDomainName.restype = OSStatus
+
+    Security.SSLHandshake.argtypes = [SSLContextRef]
+    Security.SSLHandshake.restype = OSStatus
+
+    Security.SSLRead.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
+    Security.SSLRead.restype = OSStatus
+
+    Security.SSLWrite.argtypes = [SSLContextRef, c_char_p, c_size_t, POINTER(c_size_t)]
+    Security.SSLWrite.restype = OSStatus
+
+    Security.SSLClose.argtypes = [SSLContextRef]
+    Security.SSLClose.restype = OSStatus
+
+    Security.SSLGetNumberSupportedCiphers.argtypes = [SSLContextRef, POINTER(c_size_t)]
+    Security.SSLGetNumberSupportedCiphers.restype = OSStatus
+
+    Security.SSLGetSupportedCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t),
+    ]
+    Security.SSLGetSupportedCiphers.restype = OSStatus
+
+    Security.SSLSetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        c_size_t,
+    ]
+    Security.SSLSetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNumberEnabledCiphers.argtype = [SSLContextRef, POINTER(c_size_t)]
+    Security.SSLGetNumberEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetEnabledCiphers.argtypes = [
+        SSLContextRef,
+        POINTER(SSLCipherSuite),
+        POINTER(c_size_t),
+    ]
+    Security.SSLGetEnabledCiphers.restype = OSStatus
+
+    Security.SSLGetNegotiatedCipher.argtypes = [SSLContextRef, POINTER(SSLCipherSuite)]
+    Security.SSLGetNegotiatedCipher.restype = OSStatus
+
+    Security.SSLGetNegotiatedProtocolVersion.argtypes = [
+        SSLContextRef,
+        POINTER(SSLProtocol),
+    ]
+    Security.SSLGetNegotiatedProtocolVersion.restype = OSStatus
+
+    Security.SSLCopyPeerTrust.argtypes = [SSLContextRef, POINTER(SecTrustRef)]
+    Security.SSLCopyPeerTrust.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificates.argtypes = [SecTrustRef, CFArrayRef]
+    Security.SecTrustSetAnchorCertificates.restype = OSStatus
+
+    Security.SecTrustSetAnchorCertificatesOnly.argstypes = [SecTrustRef, Boolean]
+    Security.SecTrustSetAnchorCertificatesOnly.restype = OSStatus
+
+    Security.SecTrustEvaluate.argtypes = [SecTrustRef, POINTER(SecTrustResultType)]
+    Security.SecTrustEvaluate.restype = OSStatus
+
+    Security.SecTrustGetCertificateCount.argtypes = [SecTrustRef]
+    Security.SecTrustGetCertificateCount.restype = CFIndex
+
+    Security.SecTrustGetCertificateAtIndex.argtypes = [SecTrustRef, CFIndex]
+    Security.SecTrustGetCertificateAtIndex.restype = SecCertificateRef
+
+    Security.SSLCreateContext.argtypes = [
+        CFAllocatorRef,
+        SSLProtocolSide,
+        SSLConnectionType,
+    ]
+    Security.SSLCreateContext.restype = SSLContextRef
+
+    Security.SSLSetSessionOption.argtypes = [SSLContextRef, SSLSessionOption, Boolean]
+    Security.SSLSetSessionOption.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMin.argtypes = [SSLContextRef, SSLProtocol]
+    Security.SSLSetProtocolVersionMin.restype = OSStatus
+
+    Security.SSLSetProtocolVersionMax.argtypes = [SSLContextRef, SSLProtocol]
+    Security.SSLSetProtocolVersionMax.restype = OSStatus
+
+    try:
+        Security.SSLSetALPNProtocols.argtypes = [SSLContextRef, CFArrayRef]
+        Security.SSLSetALPNProtocols.restype = OSStatus
+    except AttributeError:
+        # Supported only in 10.12+
+        pass
+
+    Security.SecCopyErrorMessageString.argtypes = [OSStatus, c_void_p]
+    Security.SecCopyErrorMessageString.restype = CFStringRef
+
+    Security.SSLReadFunc = SSLReadFunc
+    Security.SSLWriteFunc = SSLWriteFunc
+    Security.SSLContextRef = SSLContextRef
+    Security.SSLProtocol = SSLProtocol
+    Security.SSLCipherSuite = SSLCipherSuite
+    Security.SecIdentityRef = SecIdentityRef
+    Security.SecKeychainRef = SecKeychainRef
+    Security.SecTrustRef = SecTrustRef
+    Security.SecTrustResultType = SecTrustResultType
+    Security.SecExternalFormat = SecExternalFormat
+    Security.OSStatus = OSStatus
+
+    Security.kSecImportExportPassphrase = CFStringRef.in_dll(
+        Security, "kSecImportExportPassphrase"
+    )
+    Security.kSecImportItemIdentity = CFStringRef.in_dll(
+        Security, "kSecImportItemIdentity"
+    )
+
+    # CoreFoundation time!
+    CoreFoundation.CFRetain.argtypes = [CFTypeRef]
+    CoreFoundation.CFRetain.restype = CFTypeRef
+
+    CoreFoundation.CFRelease.argtypes = [CFTypeRef]
+    CoreFoundation.CFRelease.restype = None
+
+    CoreFoundation.CFGetTypeID.argtypes = [CFTypeRef]
+    CoreFoundation.CFGetTypeID.restype = CFTypeID
+
+    CoreFoundation.CFStringCreateWithCString.argtypes = [
+        CFAllocatorRef,
+        c_char_p,
+        CFStringEncoding,
+    ]
+    CoreFoundation.CFStringCreateWithCString.restype = CFStringRef
+
+    CoreFoundation.CFStringGetCStringPtr.argtypes = [CFStringRef, CFStringEncoding]
+    CoreFoundation.CFStringGetCStringPtr.restype = c_char_p
+
+    CoreFoundation.CFStringGetCString.argtypes = [
+        CFStringRef,
+        c_char_p,
+        CFIndex,
+        CFStringEncoding,
+    ]
+    CoreFoundation.CFStringGetCString.restype = c_bool
+
+    CoreFoundation.CFDataCreate.argtypes = [CFAllocatorRef, c_char_p, CFIndex]
+    CoreFoundation.CFDataCreate.restype = CFDataRef
+
+    CoreFoundation.CFDataGetLength.argtypes = [CFDataRef]
+    CoreFoundation.CFDataGetLength.restype = CFIndex
+
+    CoreFoundation.CFDataGetBytePtr.argtypes = [CFDataRef]
+    CoreFoundation.CFDataGetBytePtr.restype = c_void_p
+
+    CoreFoundation.CFDictionaryCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFDictionaryKeyCallBacks,
+        CFDictionaryValueCallBacks,
+    ]
+    CoreFoundation.CFDictionaryCreate.restype = CFDictionaryRef
+
+    CoreFoundation.CFDictionaryGetValue.argtypes = [CFDictionaryRef, CFTypeRef]
+    CoreFoundation.CFDictionaryGetValue.restype = CFTypeRef
+
+    CoreFoundation.CFArrayCreate.argtypes = [
+        CFAllocatorRef,
+        POINTER(CFTypeRef),
+        CFIndex,
+        CFArrayCallBacks,
+    ]
+    CoreFoundation.CFArrayCreate.restype = CFArrayRef
+
+    CoreFoundation.CFArrayCreateMutable.argtypes = [
+        CFAllocatorRef,
+        CFIndex,
+        CFArrayCallBacks,
+    ]
+    CoreFoundation.CFArrayCreateMutable.restype = CFMutableArrayRef
+
+    CoreFoundation.CFArrayAppendValue.argtypes = [CFMutableArrayRef, c_void_p]
+    CoreFoundation.CFArrayAppendValue.restype = None
+
+    CoreFoundation.CFArrayGetCount.argtypes = [CFArrayRef]
+    CoreFoundation.CFArrayGetCount.restype = CFIndex
+
+    CoreFoundation.CFArrayGetValueAtIndex.argtypes = [CFArrayRef, CFIndex]
+    CoreFoundation.CFArrayGetValueAtIndex.restype = c_void_p
+
+    CoreFoundation.kCFAllocatorDefault = CFAllocatorRef.in_dll(
+        CoreFoundation, "kCFAllocatorDefault"
+    )
+    CoreFoundation.kCFTypeArrayCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeArrayCallBacks"
+    )
+    CoreFoundation.kCFTypeDictionaryKeyCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeDictionaryKeyCallBacks"
+    )
+    CoreFoundation.kCFTypeDictionaryValueCallBacks = c_void_p.in_dll(
+        CoreFoundation, "kCFTypeDictionaryValueCallBacks"
+    )
+
+    CoreFoundation.CFTypeRef = CFTypeRef
+    CoreFoundation.CFArrayRef = CFArrayRef
+    CoreFoundation.CFStringRef = CFStringRef
+    CoreFoundation.CFDictionaryRef = CFDictionaryRef
+
+except (AttributeError):
+    raise ImportError("Error initializing ctypes")
+
+
+class CFConst(object):
+    """
+    A class object that acts as essentially a namespace for CoreFoundation
+    constants.
+    """
+
+    kCFStringEncodingUTF8 = CFStringEncoding(0x08000100)
+
+
+class SecurityConst(object):
+    """
+    A class object that acts as essentially a namespace for Security constants.
+    """
+
+    kSSLSessionOptionBreakOnServerAuth = 0
+
+    kSSLProtocol2 = 1
+    kSSLProtocol3 = 2
+    kTLSProtocol1 = 4
+    kTLSProtocol11 = 7
+    kTLSProtocol12 = 8
+    # SecureTransport does not support TLS 1.3 even if there's a constant for it
+    kTLSProtocol13 = 10
+    kTLSProtocolMaxSupported = 999
+
+    kSSLClientSide = 1
+    kSSLStreamType = 0
+
+    kSecFormatPEMSequence = 10
+
+    kSecTrustResultInvalid = 0
+    kSecTrustResultProceed = 1
+    # This gap is present on purpose: this was kSecTrustResultConfirm, which
+    # is deprecated.
+    kSecTrustResultDeny = 3
+    kSecTrustResultUnspecified = 4
+    kSecTrustResultRecoverableTrustFailure = 5
+    kSecTrustResultFatalTrustFailure = 6
+    kSecTrustResultOtherError = 7
+
+    errSSLProtocol = -9800
+    errSSLWouldBlock = -9803
+    errSSLClosedGraceful = -9805
+    errSSLClosedNoNotify = -9816
+    errSSLClosedAbort = -9806
+
+    errSSLXCertChainInvalid = -9807
+    errSSLCrypto = -9809
+    errSSLInternal = -9810
+    errSSLCertExpired = -9814
+    errSSLCertNotYetValid = -9815
+    errSSLUnknownRootCert = -9812
+    errSSLNoRootCert = -9813
+    errSSLHostNameMismatch = -9843
+    errSSLPeerHandshakeFail = -9824
+    errSSLPeerUserCancelled = -9839
+    errSSLWeakPeerEphemeralDHKey = -9850
+    errSSLServerAuthCompleted = -9841
+    errSSLRecordOverflow = -9847
+
+    errSecVerifyFailed = -67808
+    errSecNoTrustSettings = -25263
+    errSecItemNotFound = -25300
+    errSecInvalidTrustSettings = -25262
+
+    # Cipher suites. We only pick the ones our default cipher string allows.
+    # Source: https://developer.apple.com/documentation/security/1550981-ssl_cipher_suite_values
+    TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 = 0xC02C
+    TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 = 0xC030
+    TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 = 0xC02B
+    TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 = 0xC02F
+    TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA9
+    TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 = 0xCCA8
+    TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 = 0x009F
+    TLS_DHE_RSA_WITH_AES_128_GCM_SHA256 = 0x009E
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 = 0xC024
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 = 0xC028
+    TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA = 0xC00A
+    TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA = 0xC014
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 = 0x006B
+    TLS_DHE_RSA_WITH_AES_256_CBC_SHA = 0x0039
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 = 0xC023
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 = 0xC027
+    TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA = 0xC009
+    TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA = 0xC013
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 = 0x0067
+    TLS_DHE_RSA_WITH_AES_128_CBC_SHA = 0x0033
+    TLS_RSA_WITH_AES_256_GCM_SHA384 = 0x009D
+    TLS_RSA_WITH_AES_128_GCM_SHA256 = 0x009C
+    TLS_RSA_WITH_AES_256_CBC_SHA256 = 0x003D
+    TLS_RSA_WITH_AES_128_CBC_SHA256 = 0x003C
+    TLS_RSA_WITH_AES_256_CBC_SHA = 0x0035
+    TLS_RSA_WITH_AES_128_CBC_SHA = 0x002F
+    TLS_AES_128_GCM_SHA256 = 0x1301
+    TLS_AES_256_GCM_SHA384 = 0x1302
+    TLS_AES_128_CCM_8_SHA256 = 0x1305
+    TLS_AES_128_CCM_SHA256 = 0x1304
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
new file mode 100644
index 0000000..fa0b245
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/_securetransport/low_level.py
@@ -0,0 +1,397 @@
+"""
+Low-level helpers for the SecureTransport bindings.
+
+These are Python functions that are not directly related to the high-level APIs
+but are necessary to get them to work. They include a whole bunch of low-level
+CoreFoundation messing about and memory management. The concerns in this module
+are almost entirely about trying to avoid memory leaks and providing
+appropriate and useful assistance to the higher-level code.
+"""
+import base64
+import ctypes
+import itertools
+import os
+import re
+import ssl
+import struct
+import tempfile
+
+from .bindings import CFConst, CoreFoundation, Security
+
+# This regular expression is used to grab PEM data out of a PEM bundle.
+_PEM_CERTS_RE = re.compile(
+    b"-----BEGIN CERTIFICATE-----\n(.*?)\n-----END CERTIFICATE-----", re.DOTALL
+)
+
+
+def _cf_data_from_bytes(bytestring):
+    """
+    Given a bytestring, create a CFData object from it. This CFData object must
+    be CFReleased by the caller.
+    """
+    return CoreFoundation.CFDataCreate(
+        CoreFoundation.kCFAllocatorDefault, bytestring, len(bytestring)
+    )
+
+
+def _cf_dictionary_from_tuples(tuples):
+    """
+    Given a list of Python tuples, create an associated CFDictionary.
+    """
+    dictionary_size = len(tuples)
+
+    # We need to get the dictionary keys and values out in the same order.
+    keys = (t[0] for t in tuples)
+    values = (t[1] for t in tuples)
+    cf_keys = (CoreFoundation.CFTypeRef * dictionary_size)(*keys)
+    cf_values = (CoreFoundation.CFTypeRef * dictionary_size)(*values)
+
+    return CoreFoundation.CFDictionaryCreate(
+        CoreFoundation.kCFAllocatorDefault,
+        cf_keys,
+        cf_values,
+        dictionary_size,
+        CoreFoundation.kCFTypeDictionaryKeyCallBacks,
+        CoreFoundation.kCFTypeDictionaryValueCallBacks,
+    )
+
+
+def _cfstr(py_bstr):
+    """
+    Given a Python binary data, create a CFString.
+    The string must be CFReleased by the caller.
+    """
+    c_str = ctypes.c_char_p(py_bstr)
+    cf_str = CoreFoundation.CFStringCreateWithCString(
+        CoreFoundation.kCFAllocatorDefault,
+        c_str,
+        CFConst.kCFStringEncodingUTF8,
+    )
+    return cf_str
+
+
+def _create_cfstring_array(lst):
+    """
+    Given a list of Python binary data, create an associated CFMutableArray.
+    The array must be CFReleased by the caller.
+
+    Raises an ssl.SSLError on failure.
+    """
+    cf_arr = None
+    try:
+        cf_arr = CoreFoundation.CFArrayCreateMutable(
+            CoreFoundation.kCFAllocatorDefault,
+            0,
+            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+        )
+        if not cf_arr:
+            raise MemoryError("Unable to allocate memory!")
+        for item in lst:
+            cf_str = _cfstr(item)
+            if not cf_str:
+                raise MemoryError("Unable to allocate memory!")
+            try:
+                CoreFoundation.CFArrayAppendValue(cf_arr, cf_str)
+            finally:
+                CoreFoundation.CFRelease(cf_str)
+    except BaseException as e:
+        if cf_arr:
+            CoreFoundation.CFRelease(cf_arr)
+        raise ssl.SSLError("Unable to allocate array: %s" % (e,))
+    return cf_arr
+
+
+def _cf_string_to_unicode(value):
+    """
+    Creates a Unicode string from a CFString object. Used entirely for error
+    reporting.
+
+    Yes, it annoys me quite a lot that this function is this complex.
+    """
+    value_as_void_p = ctypes.cast(value, ctypes.POINTER(ctypes.c_void_p))
+
+    string = CoreFoundation.CFStringGetCStringPtr(
+        value_as_void_p, CFConst.kCFStringEncodingUTF8
+    )
+    if string is None:
+        buffer = ctypes.create_string_buffer(1024)
+        result = CoreFoundation.CFStringGetCString(
+            value_as_void_p, buffer, 1024, CFConst.kCFStringEncodingUTF8
+        )
+        if not result:
+            raise OSError("Error copying C string from CFStringRef")
+        string = buffer.value
+    if string is not None:
+        string = string.decode("utf-8")
+    return string
+
+
+def _assert_no_error(error, exception_class=None):
+    """
+    Checks the return code and throws an exception if there is an error to
+    report
+    """
+    if error == 0:
+        return
+
+    cf_error_string = Security.SecCopyErrorMessageString(error, None)
+    output = _cf_string_to_unicode(cf_error_string)
+    CoreFoundation.CFRelease(cf_error_string)
+
+    if output is None or output == u"":
+        output = u"OSStatus %s" % error
+
+    if exception_class is None:
+        exception_class = ssl.SSLError
+
+    raise exception_class(output)
+
+
+def _cert_array_from_pem(pem_bundle):
+    """
+    Given a bundle of certs in PEM format, turns them into a CFArray of certs
+    that can be used to validate a cert chain.
+    """
+    # Normalize the PEM bundle's line endings.
+    pem_bundle = pem_bundle.replace(b"\r\n", b"\n")
+
+    der_certs = [
+        base64.b64decode(match.group(1)) for match in _PEM_CERTS_RE.finditer(pem_bundle)
+    ]
+    if not der_certs:
+        raise ssl.SSLError("No root certificates specified")
+
+    cert_array = CoreFoundation.CFArrayCreateMutable(
+        CoreFoundation.kCFAllocatorDefault,
+        0,
+        ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+    )
+    if not cert_array:
+        raise ssl.SSLError("Unable to allocate memory!")
+
+    try:
+        for der_bytes in der_certs:
+            certdata = _cf_data_from_bytes(der_bytes)
+            if not certdata:
+                raise ssl.SSLError("Unable to allocate memory!")
+            cert = Security.SecCertificateCreateWithData(
+                CoreFoundation.kCFAllocatorDefault, certdata
+            )
+            CoreFoundation.CFRelease(certdata)
+            if not cert:
+                raise ssl.SSLError("Unable to build cert object!")
+
+            CoreFoundation.CFArrayAppendValue(cert_array, cert)
+            CoreFoundation.CFRelease(cert)
+    except Exception:
+        # We need to free the array before the exception bubbles further.
+        # We only want to do that if an error occurs: otherwise, the caller
+        # should free.
+        CoreFoundation.CFRelease(cert_array)
+        raise
+
+    return cert_array
+
+
+def _is_cert(item):
+    """
+    Returns True if a given CFTypeRef is a certificate.
+    """
+    expected = Security.SecCertificateGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _is_identity(item):
+    """
+    Returns True if a given CFTypeRef is an identity.
+    """
+    expected = Security.SecIdentityGetTypeID()
+    return CoreFoundation.CFGetTypeID(item) == expected
+
+
+def _temporary_keychain():
+    """
+    This function creates a temporary Mac keychain that we can use to work with
+    credentials. This keychain uses a one-time password and a temporary file to
+    store the data. We expect to have one keychain per socket. The returned
+    SecKeychainRef must be freed by the caller, including calling
+    SecKeychainDelete.
+
+    Returns a tuple of the SecKeychainRef and the path to the temporary
+    directory that contains it.
+    """
+    # Unfortunately, SecKeychainCreate requires a path to a keychain. This
+    # means we cannot use mkstemp to use a generic temporary file. Instead,
+    # we're going to create a temporary directory and a filename to use there.
+    # This filename will be 8 random bytes expanded into base64. We also need
+    # some random bytes to password-protect the keychain we're creating, so we
+    # ask for 40 random bytes.
+    random_bytes = os.urandom(40)
+    filename = base64.b16encode(random_bytes[:8]).decode("utf-8")
+    password = base64.b16encode(random_bytes[8:])  # Must be valid UTF-8
+    tempdirectory = tempfile.mkdtemp()
+
+    keychain_path = os.path.join(tempdirectory, filename).encode("utf-8")
+
+    # We now want to create the keychain itself.
+    keychain = Security.SecKeychainRef()
+    status = Security.SecKeychainCreate(
+        keychain_path, len(password), password, False, None, ctypes.byref(keychain)
+    )
+    _assert_no_error(status)
+
+    # Having created the keychain, we want to pass it off to the caller.
+    return keychain, tempdirectory
+
+
+def _load_items_from_file(keychain, path):
+    """
+    Given a single file, loads all the trust objects from it into arrays and
+    the keychain.
+    Returns a tuple of lists: the first list is a list of identities, the
+    second a list of certs.
+    """
+    certificates = []
+    identities = []
+    result_array = None
+
+    with open(path, "rb") as f:
+        raw_filedata = f.read()
+
+    try:
+        filedata = CoreFoundation.CFDataCreate(
+            CoreFoundation.kCFAllocatorDefault, raw_filedata, len(raw_filedata)
+        )
+        result_array = CoreFoundation.CFArrayRef()
+        result = Security.SecItemImport(
+            filedata,  # cert data
+            None,  # Filename, leaving it out for now
+            None,  # What the type of the file is, we don't care
+            None,  # what's in the file, we don't care
+            0,  # import flags
+            None,  # key params, can include passphrase in the future
+            keychain,  # The keychain to insert into
+            ctypes.byref(result_array),  # Results
+        )
+        _assert_no_error(result)
+
+        # A CFArray is not very useful to us as an intermediary
+        # representation, so we are going to extract the objects we want
+        # and then free the array. We don't need to keep hold of keys: the
+        # keychain already has them!
+        result_count = CoreFoundation.CFArrayGetCount(result_array)
+        for index in range(result_count):
+            item = CoreFoundation.CFArrayGetValueAtIndex(result_array, index)
+            item = ctypes.cast(item, CoreFoundation.CFTypeRef)
+
+            if _is_cert(item):
+                CoreFoundation.CFRetain(item)
+                certificates.append(item)
+            elif _is_identity(item):
+                CoreFoundation.CFRetain(item)
+                identities.append(item)
+    finally:
+        if result_array:
+            CoreFoundation.CFRelease(result_array)
+
+        CoreFoundation.CFRelease(filedata)
+
+    return (identities, certificates)
+
+
+def _load_client_cert_chain(keychain, *paths):
+    """
+    Load certificates and maybe keys from a number of files. Has the end goal
+    of returning a CFArray containing one SecIdentityRef, and then zero or more
+    SecCertificateRef objects, suitable for use as a client certificate trust
+    chain.
+    """
+    # Ok, the strategy.
+    #
+    # This relies on knowing that macOS will not give you a SecIdentityRef
+    # unless you have imported a key into a keychain. This is a somewhat
+    # artificial limitation of macOS (for example, it doesn't necessarily
+    # affect iOS), but there is nothing inside Security.framework that lets you
+    # get a SecIdentityRef without having a key in a keychain.
+    #
+    # So the policy here is we take all the files and iterate them in order.
+    # Each one will use SecItemImport to have one or more objects loaded from
+    # it. We will also point at a keychain that macOS can use to work with the
+    # private key.
+    #
+    # Once we have all the objects, we'll check what we actually have. If we
+    # already have a SecIdentityRef in hand, fab: we'll use that. Otherwise,
+    # we'll take the first certificate (which we assume to be our leaf) and
+    # ask the keychain to give us a SecIdentityRef with that cert's associated
+    # key.
+    #
+    # We'll then return a CFArray containing the trust chain: one
+    # SecIdentityRef and then zero-or-more SecCertificateRef objects. The
+    # responsibility for freeing this CFArray will be with the caller. This
+    # CFArray must remain alive for the entire connection, so in practice it
+    # will be stored with a single SSLSocket, along with the reference to the
+    # keychain.
+    certificates = []
+    identities = []
+
+    # Filter out bad paths.
+    paths = (path for path in paths if path)
+
+    try:
+        for file_path in paths:
+            new_identities, new_certs = _load_items_from_file(keychain, file_path)
+            identities.extend(new_identities)
+            certificates.extend(new_certs)
+
+        # Ok, we have everything. The question is: do we have an identity? If
+        # not, we want to grab one from the first cert we have.
+        if not identities:
+            new_identity = Security.SecIdentityRef()
+            status = Security.SecIdentityCreateWithCertificate(
+                keychain, certificates[0], ctypes.byref(new_identity)
+            )
+            _assert_no_error(status)
+            identities.append(new_identity)
+
+            # We now want to release the original certificate, as we no longer
+            # need it.
+            CoreFoundation.CFRelease(certificates.pop(0))
+
+        # We now need to build a new CFArray that holds the trust chain.
+        trust_chain = CoreFoundation.CFArrayCreateMutable(
+            CoreFoundation.kCFAllocatorDefault,
+            0,
+            ctypes.byref(CoreFoundation.kCFTypeArrayCallBacks),
+        )
+        for item in itertools.chain(identities, certificates):
+            # ArrayAppendValue does a CFRetain on the item. That's fine,
+            # because the finally block will release our other refs to them.
+            CoreFoundation.CFArrayAppendValue(trust_chain, item)
+
+        return trust_chain
+    finally:
+        for obj in itertools.chain(identities, certificates):
+            CoreFoundation.CFRelease(obj)
+
+
+TLS_PROTOCOL_VERSIONS = {
+    "SSLv2": (0, 2),
+    "SSLv3": (3, 0),
+    "TLSv1": (3, 1),
+    "TLSv1.1": (3, 2),
+    "TLSv1.2": (3, 3),
+}
+
+
+def _build_tls_unknown_ca_alert(version):
+    """
+    Builds a TLS alert record for an unknown CA.
+    """
+    ver_maj, ver_min = TLS_PROTOCOL_VERSIONS[version]
+    severity_fatal = 0x02
+    description_unknown_ca = 0x30
+    msg = struct.pack(">BB", severity_fatal, description_unknown_ca)
+    msg_len = len(msg)
+    record_type_alert = 0x15
+    record = struct.pack(">BBBH", record_type_alert, ver_maj, ver_min, msg_len) + msg
+    return record
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/appengine.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/appengine.py
new file mode 100644
index 0000000..6685386
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/appengine.py
@@ -0,0 +1,314 @@
+"""
+This module provides a pool manager that uses Google App Engine's
+`URLFetch Service <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+Example usage::
+
+    from pip._vendor.urllib3 import PoolManager
+    from pip._vendor.urllib3.contrib.appengine import AppEngineManager, is_appengine_sandbox
+
+    if is_appengine_sandbox():
+        # AppEngineManager uses AppEngine's URLFetch API behind the scenes
+        http = AppEngineManager()
+    else:
+        # PoolManager uses a socket-level API behind the scenes
+        http = PoolManager()
+
+    r = http.request('GET', 'https://google.com/')
+
+There are `limitations <https://cloud.google.com/appengine/docs/python/\
+urlfetch/#Python_Quotas_and_limits>`_ to the URLFetch service and it may not be
+the best choice for your application. There are three options for using
+urllib3 on Google App Engine:
+
+1. You can use :class:`AppEngineManager` with URLFetch. URLFetch is
+   cost-effective in many circumstances as long as your usage is within the
+   limitations.
+2. You can use a normal :class:`~urllib3.PoolManager` by enabling sockets.
+   Sockets also have `limitations and restrictions
+   <https://cloud.google.com/appengine/docs/python/sockets/\
+   #limitations-and-restrictions>`_ and have a lower free quota than URLFetch.
+   To use sockets, be sure to specify the following in your ``app.yaml``::
+
+        env_variables:
+            GAE_USE_SOCKETS_HTTPLIB : 'true'
+
+3. If you are using `App Engine Flexible
+<https://cloud.google.com/appengine/docs/flexible/>`_, you can use the standard
+:class:`PoolManager` without any configuration or special environment variables.
+"""
+
+from __future__ import absolute_import
+
+import io
+import logging
+import warnings
+
+from ..exceptions import (
+    HTTPError,
+    HTTPWarning,
+    MaxRetryError,
+    ProtocolError,
+    SSLError,
+    TimeoutError,
+)
+from ..packages.six.moves.urllib.parse import urljoin
+from ..request import RequestMethods
+from ..response import HTTPResponse
+from ..util.retry import Retry
+from ..util.timeout import Timeout
+from . import _appengine_environ
+
+try:
+    from google.appengine.api import urlfetch
+except ImportError:
+    urlfetch = None
+
+
+log = logging.getLogger(__name__)
+
+
+class AppEnginePlatformWarning(HTTPWarning):
+    pass
+
+
+class AppEnginePlatformError(HTTPError):
+    pass
+
+
+class AppEngineManager(RequestMethods):
+    """
+    Connection manager for Google App Engine sandbox applications.
+
+    This manager uses the URLFetch service directly instead of using the
+    emulated httplib, and is subject to URLFetch limitations as described in
+    the App Engine documentation `here
+    <https://cloud.google.com/appengine/docs/python/urlfetch>`_.
+
+    Notably it will raise an :class:`AppEnginePlatformError` if:
+        * URLFetch is not available.
+        * If you attempt to use this on App Engine Flexible, as full socket
+          support is available.
+        * If a request size is more than 10 megabytes.
+        * If a response size is more than 32 megabytes.
+        * If you use an unsupported request method such as OPTIONS.
+
+    Beyond those cases, it will raise normal urllib3 errors.
+    """
+
+    def __init__(
+        self,
+        headers=None,
+        retries=None,
+        validate_certificate=True,
+        urlfetch_retries=True,
+    ):
+        if not urlfetch:
+            raise AppEnginePlatformError(
+                "URLFetch is not available in this environment."
+            )
+
+        warnings.warn(
+            "urllib3 is using URLFetch on Google App Engine sandbox instead "
+            "of sockets. To use sockets directly instead of URLFetch see "
+            "https://urllib3.readthedocs.io/en/1.26.x/reference/urllib3.contrib.html.",
+            AppEnginePlatformWarning,
+        )
+
+        RequestMethods.__init__(self, headers)
+        self.validate_certificate = validate_certificate
+        self.urlfetch_retries = urlfetch_retries
+
+        self.retries = retries or Retry.DEFAULT
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=None,
+        redirect=True,
+        timeout=Timeout.DEFAULT_TIMEOUT,
+        **response_kw
+    ):
+
+        retries = self._get_retries(retries, redirect)
+
+        try:
+            follow_redirects = redirect and retries.redirect != 0 and retries.total
+            response = urlfetch.fetch(
+                url,
+                payload=body,
+                method=method,
+                headers=headers or {},
+                allow_truncated=False,
+                follow_redirects=self.urlfetch_retries and follow_redirects,
+                deadline=self._get_absolute_timeout(timeout),
+                validate_certificate=self.validate_certificate,
+            )
+        except urlfetch.DeadlineExceededError as e:
+            raise TimeoutError(self, e)
+
+        except urlfetch.InvalidURLError as e:
+            if "too large" in str(e):
+                raise AppEnginePlatformError(
+                    "URLFetch request too large, URLFetch only "
+                    "supports requests up to 10mb in size.",
+                    e,
+                )
+            raise ProtocolError(e)
+
+        except urlfetch.DownloadError as e:
+            if "Too many redirects" in str(e):
+                raise MaxRetryError(self, url, reason=e)
+            raise ProtocolError(e)
+
+        except urlfetch.ResponseTooLargeError as e:
+            raise AppEnginePlatformError(
+                "URLFetch response too large, URLFetch only supports"
+                "responses up to 32mb in size.",
+                e,
+            )
+
+        except urlfetch.SSLCertificateError as e:
+            raise SSLError(e)
+
+        except urlfetch.InvalidMethodError as e:
+            raise AppEnginePlatformError(
+                "URLFetch does not support method: %s" % method, e
+            )
+
+        http_response = self._urlfetch_response_to_http_response(
+            response, retries=retries, **response_kw
+        )
+
+        # Handle redirect?
+        redirect_location = redirect and http_response.get_redirect_location()
+        if redirect_location:
+            # Check for redirect response
+            if self.urlfetch_retries and retries.raise_on_redirect:
+                raise MaxRetryError(self, url, "too many redirects")
+            else:
+                if http_response.status == 303:
+                    method = "GET"
+
+                try:
+                    retries = retries.increment(
+                        method, url, response=http_response, _pool=self
+                    )
+                except MaxRetryError:
+                    if retries.raise_on_redirect:
+                        raise MaxRetryError(self, url, "too many redirects")
+                    return http_response
+
+                retries.sleep_for_retry(http_response)
+                log.debug("Redirecting %s -> %s", url, redirect_location)
+                redirect_url = urljoin(url, redirect_location)
+                return self.urlopen(
+                    method,
+                    redirect_url,
+                    body,
+                    headers,
+                    retries=retries,
+                    redirect=redirect,
+                    timeout=timeout,
+                    **response_kw
+                )
+
+        # Check if we should retry the HTTP response.
+        has_retry_after = bool(http_response.getheader("Retry-After"))
+        if retries.is_retry(method, http_response.status, has_retry_after):
+            retries = retries.increment(method, url, response=http_response, _pool=self)
+            log.debug("Retry: %s", url)
+            retries.sleep(http_response)
+            return self.urlopen(
+                method,
+                url,
+                body=body,
+                headers=headers,
+                retries=retries,
+                redirect=redirect,
+                timeout=timeout,
+                **response_kw
+            )
+
+        return http_response
+
+    def _urlfetch_response_to_http_response(self, urlfetch_resp, **response_kw):
+
+        if is_prod_appengine():
+            # Production GAE handles deflate encoding automatically, but does
+            # not remove the encoding header.
+            content_encoding = urlfetch_resp.headers.get("content-encoding")
+
+            if content_encoding == "deflate":
+                del urlfetch_resp.headers["content-encoding"]
+
+        transfer_encoding = urlfetch_resp.headers.get("transfer-encoding")
+        # We have a full response's content,
+        # so let's make sure we don't report ourselves as chunked data.
+        if transfer_encoding == "chunked":
+            encodings = transfer_encoding.split(",")
+            encodings.remove("chunked")
+            urlfetch_resp.headers["transfer-encoding"] = ",".join(encodings)
+
+        original_response = HTTPResponse(
+            # In order for decoding to work, we must present the content as
+            # a file-like object.
+            body=io.BytesIO(urlfetch_resp.content),
+            msg=urlfetch_resp.header_msg,
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            **response_kw
+        )
+
+        return HTTPResponse(
+            body=io.BytesIO(urlfetch_resp.content),
+            headers=urlfetch_resp.headers,
+            status=urlfetch_resp.status_code,
+            original_response=original_response,
+            **response_kw
+        )
+
+    def _get_absolute_timeout(self, timeout):
+        if timeout is Timeout.DEFAULT_TIMEOUT:
+            return None  # Defer to URLFetch's default.
+        if isinstance(timeout, Timeout):
+            if timeout._read is not None or timeout._connect is not None:
+                warnings.warn(
+                    "URLFetch does not support granular timeout settings, "
+                    "reverting to total or default URLFetch timeout.",
+                    AppEnginePlatformWarning,
+                )
+            return timeout.total
+        return timeout
+
+    def _get_retries(self, retries, redirect):
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect, default=self.retries)
+
+        if retries.connect or retries.read or retries.redirect:
+            warnings.warn(
+                "URLFetch only supports total retries and does not "
+                "recognize connect, read, or redirect retry parameters.",
+                AppEnginePlatformWarning,
+            )
+
+        return retries
+
+
+# Alias methods from _appengine_environ to maintain public API interface.
+
+is_appengine = _appengine_environ.is_appengine
+is_appengine_sandbox = _appengine_environ.is_appengine_sandbox
+is_local_appengine = _appengine_environ.is_local_appengine
+is_prod_appengine = _appengine_environ.is_prod_appengine
+is_prod_appengine_mvms = _appengine_environ.is_prod_appengine_mvms
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
new file mode 100644
index 0000000..41a8fd1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/ntlmpool.py
@@ -0,0 +1,130 @@
+"""
+NTLM authenticating pool, contributed by erikcederstran
+
+Issue #10, see: http://code.google.com/p/urllib3/issues/detail?id=10
+"""
+from __future__ import absolute_import
+
+import warnings
+from logging import getLogger
+
+from ntlm import ntlm
+
+from .. import HTTPSConnectionPool
+from ..packages.six.moves.http_client import HTTPSConnection
+
+warnings.warn(
+    "The 'urllib3.contrib.ntlmpool' module is deprecated and will be removed "
+    "in urllib3 v2.0 release, urllib3 is not able to support it properly due "
+    "to reasons listed in issue: https://github.com/urllib3/urllib3/issues/2282. "
+    "If you are a user of this module please comment in the mentioned issue.",
+    DeprecationWarning,
+)
+
+log = getLogger(__name__)
+
+
+class NTLMConnectionPool(HTTPSConnectionPool):
+    """
+    Implements an NTLM authentication version of an urllib3 connection pool
+    """
+
+    scheme = "https"
+
+    def __init__(self, user, pw, authurl, *args, **kwargs):
+        """
+        authurl is a random URL on the server that is protected by NTLM.
+        user is the Windows user, probably in the DOMAIN\\username format.
+        pw is the password for the user.
+        """
+        super(NTLMConnectionPool, self).__init__(*args, **kwargs)
+        self.authurl = authurl
+        self.rawuser = user
+        user_parts = user.split("\\", 1)
+        self.domain = user_parts[0].upper()
+        self.user = user_parts[1]
+        self.pw = pw
+
+    def _new_conn(self):
+        # Performs the NTLM handshake that secures the connection. The socket
+        # must be kept open while requests are performed.
+        self.num_connections += 1
+        log.debug(
+            "Starting NTLM HTTPS connection no. %d: https://%s%s",
+            self.num_connections,
+            self.host,
+            self.authurl,
+        )
+
+        headers = {"Connection": "Keep-Alive"}
+        req_header = "Authorization"
+        resp_header = "www-authenticate"
+
+        conn = HTTPSConnection(host=self.host, port=self.port)
+
+        # Send negotiation message
+        headers[req_header] = "NTLM %s" % ntlm.create_NTLM_NEGOTIATE_MESSAGE(
+            self.rawuser
+        )
+        log.debug("Request headers: %s", headers)
+        conn.request("GET", self.authurl, None, headers)
+        res = conn.getresponse()
+        reshdr = dict(res.getheaders())
+        log.debug("Response status: %s %s", res.status, res.reason)
+        log.debug("Response headers: %s", reshdr)
+        log.debug("Response data: %s [...]", res.read(100))
+
+        # Remove the reference to the socket, so that it can not be closed by
+        # the response object (we want to keep the socket open)
+        res.fp = None
+
+        # Server should respond with a challenge message
+        auth_header_values = reshdr[resp_header].split(", ")
+        auth_header_value = None
+        for s in auth_header_values:
+            if s[:5] == "NTLM ":
+                auth_header_value = s[5:]
+        if auth_header_value is None:
+            raise Exception(
+                "Unexpected %s response header: %s" % (resp_header, reshdr[resp_header])
+            )
+
+        # Send authentication message
+        ServerChallenge, NegotiateFlags = ntlm.parse_NTLM_CHALLENGE_MESSAGE(
+            auth_header_value
+        )
+        auth_msg = ntlm.create_NTLM_AUTHENTICATE_MESSAGE(
+            ServerChallenge, self.user, self.domain, self.pw, NegotiateFlags
+        )
+        headers[req_header] = "NTLM %s" % auth_msg
+        log.debug("Request headers: %s", headers)
+        conn.request("GET", self.authurl, None, headers)
+        res = conn.getresponse()
+        log.debug("Response status: %s %s", res.status, res.reason)
+        log.debug("Response headers: %s", dict(res.getheaders()))
+        log.debug("Response data: %s [...]", res.read()[:100])
+        if res.status != 200:
+            if res.status == 401:
+                raise Exception("Server rejected request: wrong username or password")
+            raise Exception("Wrong server response: %s %s" % (res.status, res.reason))
+
+        res.fp = None
+        log.debug("Connection established")
+        return conn
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        retries=3,
+        redirect=True,
+        assert_same_host=True,
+    ):
+        if headers is None:
+            headers = {}
+        headers["Connection"] = "Keep-Alive"
+        return super(NTLMConnectionPool, self).urlopen(
+            method, url, body, headers, retries, redirect, assert_same_host
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
new file mode 100644
index 0000000..528764a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/pyopenssl.py
@@ -0,0 +1,519 @@
+"""
+TLS with SNI_-support for Python 2. Follow these instructions if you would
+like to verify TLS certificates in Python 2. Note, the default libraries do
+*not* do certificate checking; you need to do additional work to validate
+certificates yourself.
+
+This needs the following packages installed:
+
+* `pyOpenSSL`_ (tested with 16.0.0)
+* `cryptography`_ (minimum 1.3.4, from pyopenssl)
+* `idna`_ (minimum 2.0, from cryptography)
+
+However, pyopenssl depends on cryptography, which depends on idna, so while we
+use all three directly here we end up having relatively few packages required.
+
+You can install them with the following command:
+
+.. code-block:: bash
+
+    $ python -m pip install pyopenssl cryptography idna
+
+To activate certificate checking, call
+:func:`~urllib3.contrib.pyopenssl.inject_into_urllib3` from your Python code
+before you begin making HTTP requests. This can be done in a ``sitecustomize``
+module, or at any other time before your application begins using ``urllib3``,
+like this:
+
+.. code-block:: python
+
+    try:
+        import pip._vendor.urllib3.contrib.pyopenssl as pyopenssl
+        pyopenssl.inject_into_urllib3()
+    except ImportError:
+        pass
+
+Now you can use :mod:`urllib3` as you normally would, and it will support SNI
+when the required modules are installed.
+
+Activating this module also has the positive side effect of disabling SSL/TLS
+compression in Python 2 (see `CRIME attack`_).
+
+.. _sni: https://en.wikipedia.org/wiki/Server_Name_Indication
+.. _crime attack: https://en.wikipedia.org/wiki/CRIME_(security_exploit)
+.. _pyopenssl: https://www.pyopenssl.org
+.. _cryptography: https://cryptography.io
+.. _idna: https://github.com/kjd/idna
+"""
+from __future__ import absolute_import
+
+import OpenSSL.SSL
+from cryptography import x509
+from cryptography.hazmat.backends.openssl import backend as openssl_backend
+from cryptography.hazmat.backends.openssl.x509 import _Certificate
+
+try:
+    from cryptography.x509 import UnsupportedExtension
+except ImportError:
+    # UnsupportedExtension is gone in cryptography >= 2.1.0
+    class UnsupportedExtension(Exception):
+        pass
+
+
+from io import BytesIO
+from socket import error as SocketError
+from socket import timeout
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+import logging
+import ssl
+import sys
+import warnings
+
+from .. import util
+from ..packages import six
+from ..util.ssl_ import PROTOCOL_TLS_CLIENT
+
+warnings.warn(
+    "'urllib3.contrib.pyopenssl' module is deprecated and will be removed "
+    "in a future release of urllib3 2.x. Read more in this issue: "
+    "https://github.com/urllib3/urllib3/issues/2680",
+    category=DeprecationWarning,
+    stacklevel=2,
+)
+
+__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
+
+# SNI always works.
+HAS_SNI = True
+
+# Map from urllib3 to PyOpenSSL compatible parameter-values.
+_openssl_versions = {
+    util.PROTOCOL_TLS: OpenSSL.SSL.SSLv23_METHOD,
+    PROTOCOL_TLS_CLIENT: OpenSSL.SSL.SSLv23_METHOD,
+    ssl.PROTOCOL_TLSv1: OpenSSL.SSL.TLSv1_METHOD,
+}
+
+if hasattr(ssl, "PROTOCOL_SSLv3") and hasattr(OpenSSL.SSL, "SSLv3_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_SSLv3] = OpenSSL.SSL.SSLv3_METHOD
+
+if hasattr(ssl, "PROTOCOL_TLSv1_1") and hasattr(OpenSSL.SSL, "TLSv1_1_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_1] = OpenSSL.SSL.TLSv1_1_METHOD
+
+if hasattr(ssl, "PROTOCOL_TLSv1_2") and hasattr(OpenSSL.SSL, "TLSv1_2_METHOD"):
+    _openssl_versions[ssl.PROTOCOL_TLSv1_2] = OpenSSL.SSL.TLSv1_2_METHOD
+
+
+_stdlib_to_openssl_verify = {
+    ssl.CERT_NONE: OpenSSL.SSL.VERIFY_NONE,
+    ssl.CERT_OPTIONAL: OpenSSL.SSL.VERIFY_PEER,
+    ssl.CERT_REQUIRED: OpenSSL.SSL.VERIFY_PEER
+    + OpenSSL.SSL.VERIFY_FAIL_IF_NO_PEER_CERT,
+}
+_openssl_to_stdlib_verify = dict((v, k) for k, v in _stdlib_to_openssl_verify.items())
+
+# OpenSSL will only write 16K at a time
+SSL_WRITE_BLOCKSIZE = 16384
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+
+log = logging.getLogger(__name__)
+
+
+def inject_into_urllib3():
+    "Monkey-patch urllib3 with PyOpenSSL-backed SSL-support."
+
+    _validate_dependencies_met()
+
+    util.SSLContext = PyOpenSSLContext
+    util.ssl_.SSLContext = PyOpenSSLContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_PYOPENSSL = True
+    util.ssl_.IS_PYOPENSSL = True
+
+
+def extract_from_urllib3():
+    "Undo monkey-patching by :func:`inject_into_urllib3`."
+
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_PYOPENSSL = False
+    util.ssl_.IS_PYOPENSSL = False
+
+
+def _validate_dependencies_met():
+    """
+    Verifies that PyOpenSSL's package-level dependencies have been met.
+    Throws `ImportError` if they are not met.
+    """
+    # Method added in `cryptography==1.1`; not available in older versions
+    from cryptography.x509.extensions import Extensions
+
+    if getattr(Extensions, "get_extension_for_class", None) is None:
+        raise ImportError(
+            "'cryptography' module missing required functionality.  "
+            "Try upgrading to v1.3.4 or newer."
+        )
+
+    # pyOpenSSL 0.14 and above use cryptography for OpenSSL bindings. The _x509
+    # attribute is only present on those versions.
+    from OpenSSL.crypto import X509
+
+    x509 = X509()
+    if getattr(x509, "_x509", None) is None:
+        raise ImportError(
+            "'pyOpenSSL' module missing required functionality. "
+            "Try upgrading to v0.14 or newer."
+        )
+
+
+def _dnsname_to_stdlib(name):
+    """
+    Converts a dNSName SubjectAlternativeName field to the form used by the
+    standard library on the given Python version.
+
+    Cryptography produces a dNSName as a unicode string that was idna-decoded
+    from ASCII bytes. We need to idna-encode that string to get it back, and
+    then on Python 3 we also need to convert to unicode via UTF-8 (the stdlib
+    uses PyUnicode_FromStringAndSize on it, which decodes via UTF-8).
+
+    If the name cannot be idna-encoded then we return None signalling that
+    the name given should be skipped.
+    """
+
+    def idna_encode(name):
+        """
+        Borrowed wholesale from the Python Cryptography Project. It turns out
+        that we can't just safely call `idna.encode`: it can explode for
+        wildcard names. This avoids that problem.
+        """
+        from pip._vendor import idna
+
+        try:
+            for prefix in [u"*.", u"."]:
+                if name.startswith(prefix):
+                    name = name[len(prefix) :]
+                    return prefix.encode("ascii") + idna.encode(name)
+            return idna.encode(name)
+        except idna.core.IDNAError:
+            return None
+
+    # Don't send IPv6 addresses through the IDNA encoder.
+    if ":" in name:
+        return name
+
+    name = idna_encode(name)
+    if name is None:
+        return None
+    elif sys.version_info >= (3, 0):
+        name = name.decode("utf-8")
+    return name
+
+
+def get_subj_alt_name(peer_cert):
+    """
+    Given an PyOpenSSL certificate, provides all the subject alternative names.
+    """
+    # Pass the cert to cryptography, which has much better APIs for this.
+    if hasattr(peer_cert, "to_cryptography"):
+        cert = peer_cert.to_cryptography()
+    else:
+        # This is technically using private APIs, but should work across all
+        # relevant versions before PyOpenSSL got a proper API for this.
+        cert = _Certificate(openssl_backend, peer_cert._x509)
+
+    # We want to find the SAN extension. Ask Cryptography to locate it (it's
+    # faster than looping in Python)
+    try:
+        ext = cert.extensions.get_extension_for_class(x509.SubjectAlternativeName).value
+    except x509.ExtensionNotFound:
+        # No such extension, return the empty list.
+        return []
+    except (
+        x509.DuplicateExtension,
+        UnsupportedExtension,
+        x509.UnsupportedGeneralNameType,
+        UnicodeError,
+    ) as e:
+        # A problem has been found with the quality of the certificate. Assume
+        # no SAN field is present.
+        log.warning(
+            "A problem was encountered with the certificate that prevented "
+            "urllib3 from finding the SubjectAlternativeName field. This can "
+            "affect certificate validation. The error was %s",
+            e,
+        )
+        return []
+
+    # We want to return dNSName and iPAddress fields. We need to cast the IPs
+    # back to strings because the match_hostname function wants them as
+    # strings.
+    # Sadly the DNS names need to be idna encoded and then, on Python 3, UTF-8
+    # decoded. This is pretty frustrating, but that's what the standard library
+    # does with certificates, and so we need to attempt to do the same.
+    # We also want to skip over names which cannot be idna encoded.
+    names = [
+        ("DNS", name)
+        for name in map(_dnsname_to_stdlib, ext.get_values_for_type(x509.DNSName))
+        if name is not None
+    ]
+    names.extend(
+        ("IP Address", str(name)) for name in ext.get_values_for_type(x509.IPAddress)
+    )
+
+    return names
+
+
+class WrappedSocket(object):
+    """API-compatibility wrapper for Python OpenSSL's Connection-class.
+
+    Note: _makefile_refs, _drop() and _reuse() are needed for the garbage
+    collector of pypy.
+    """
+
+    def __init__(self, connection, socket, suppress_ragged_eofs=True):
+        self.connection = connection
+        self.socket = socket
+        self.suppress_ragged_eofs = suppress_ragged_eofs
+        self._makefile_refs = 0
+        self._closed = False
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, *args, **kwargs):
+        try:
+            data = self.connection.recv(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
+                return b""
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return b""
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout("The read operation timed out")
+            else:
+                return self.recv(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+        else:
+            return data
+
+    def recv_into(self, *args, **kwargs):
+        try:
+            return self.connection.recv_into(*args, **kwargs)
+        except OpenSSL.SSL.SysCallError as e:
+            if self.suppress_ragged_eofs and e.args == (-1, "Unexpected EOF"):
+                return 0
+            else:
+                raise SocketError(str(e))
+        except OpenSSL.SSL.ZeroReturnError:
+            if self.connection.get_shutdown() == OpenSSL.SSL.RECEIVED_SHUTDOWN:
+                return 0
+            else:
+                raise
+        except OpenSSL.SSL.WantReadError:
+            if not util.wait_for_read(self.socket, self.socket.gettimeout()):
+                raise timeout("The read operation timed out")
+            else:
+                return self.recv_into(*args, **kwargs)
+
+        # TLS 1.3 post-handshake authentication
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("read error: %r" % e)
+
+    def settimeout(self, timeout):
+        return self.socket.settimeout(timeout)
+
+    def _send_until_done(self, data):
+        while True:
+            try:
+                return self.connection.send(data)
+            except OpenSSL.SSL.WantWriteError:
+                if not util.wait_for_write(self.socket, self.socket.gettimeout()):
+                    raise timeout()
+                continue
+            except OpenSSL.SSL.SysCallError as e:
+                raise SocketError(str(e))
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self._send_until_done(
+                data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE]
+            )
+            total_sent += sent
+
+    def shutdown(self):
+        # FIXME rethrow compatible exceptions should we ever use this
+        self.connection.shutdown()
+
+    def close(self):
+        if self._makefile_refs < 1:
+            try:
+                self._closed = True
+                return self.connection.close()
+            except OpenSSL.SSL.Error:
+                return
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        x509 = self.connection.get_peer_certificate()
+
+        if not x509:
+            return x509
+
+        if binary_form:
+            return OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_ASN1, x509)
+
+        return {
+            "subject": ((("commonName", x509.get_subject().CN),),),
+            "subjectAltName": get_subj_alt_name(x509),
+        }
+
+    def version(self):
+        return self.connection.get_protocol_version_name()
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+
+else:  # Platform-specific: Python 3
+    makefile = backport_makefile
+
+WrappedSocket.makefile = makefile
+
+
+class PyOpenSSLContext(object):
+    """
+    I am a wrapper class for the PyOpenSSL ``Context`` object. I am responsible
+    for translating the interface of the standard library ``SSLContext`` object
+    to calls into PyOpenSSL.
+    """
+
+    def __init__(self, protocol):
+        self.protocol = _openssl_versions[protocol]
+        self._ctx = OpenSSL.SSL.Context(self.protocol)
+        self._options = 0
+        self.check_hostname = False
+
+    @property
+    def options(self):
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        self._options = value
+        self._ctx.set_options(value)
+
+    @property
+    def verify_mode(self):
+        return _openssl_to_stdlib_verify[self._ctx.get_verify_mode()]
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._ctx.set_verify(_stdlib_to_openssl_verify[value], _verify_callback)
+
+    def set_default_verify_paths(self):
+        self._ctx.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        if isinstance(ciphers, six.text_type):
+            ciphers = ciphers.encode("utf-8")
+        self._ctx.set_cipher_list(ciphers)
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        if cafile is not None:
+            cafile = cafile.encode("utf-8")
+        if capath is not None:
+            capath = capath.encode("utf-8")
+        try:
+            self._ctx.load_verify_locations(cafile, capath)
+            if cadata is not None:
+                self._ctx.load_verify_locations(BytesIO(cadata))
+        except OpenSSL.SSL.Error as e:
+            raise ssl.SSLError("unable to load trusted certificates: %r" % e)
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._ctx.use_certificate_chain_file(certfile)
+        if password is not None:
+            if not isinstance(password, six.binary_type):
+                password = password.encode("utf-8")
+            self._ctx.set_passwd_cb(lambda *_: password)
+        self._ctx.use_privatekey_file(keyfile or certfile)
+
+    def set_alpn_protocols(self, protocols):
+        protocols = [six.ensure_binary(p) for p in protocols]
+        return self._ctx.set_alpn_protos(protocols)
+
+    def wrap_socket(
+        self,
+        sock,
+        server_side=False,
+        do_handshake_on_connect=True,
+        suppress_ragged_eofs=True,
+        server_hostname=None,
+    ):
+        cnx = OpenSSL.SSL.Connection(self._ctx, sock)
+
+        if isinstance(server_hostname, six.text_type):  # Platform-specific: Python 3
+            server_hostname = server_hostname.encode("utf-8")
+
+        if server_hostname is not None:
+            cnx.set_tlsext_host_name(server_hostname)
+
+        cnx.set_connect_state()
+
+        while True:
+            try:
+                cnx.do_handshake()
+            except OpenSSL.SSL.WantReadError:
+                if not util.wait_for_read(sock, sock.gettimeout()):
+                    raise timeout("select timed out")
+                continue
+            except OpenSSL.SSL.Error as e:
+                raise ssl.SSLError("bad handshake: %r" % e)
+            break
+
+        return WrappedSocket(cnx, sock)
+
+
+def _verify_callback(cnx, x509, err_no, err_depth, return_code):
+    return err_no == 0
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/securetransport.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
new file mode 100644
index 0000000..4a06bc6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/securetransport.py
@@ -0,0 +1,921 @@
+"""
+SecureTranport support for urllib3 via ctypes.
+
+This makes platform-native TLS available to urllib3 users on macOS without the
+use of a compiler. This is an important feature because the Python Package
+Index is moving to become a TLSv1.2-or-higher server, and the default OpenSSL
+that ships with macOS is not capable of doing TLSv1.2. The only way to resolve
+this is to give macOS users an alternative solution to the problem, and that
+solution is to use SecureTransport.
+
+We use ctypes here because this solution must not require a compiler. That's
+because pip is not allowed to require a compiler either.
+
+This is not intended to be a seriously long-term solution to this problem.
+The hope is that PEP 543 will eventually solve this issue for us, at which
+point we can retire this contrib module. But in the short term, we need to
+solve the impending tire fire that is Python on Mac without this kind of
+contrib module. So...here we are.
+
+To use this module, simply import and inject it::
+
+    import pip._vendor.urllib3.contrib.securetransport as securetransport
+    securetransport.inject_into_urllib3()
+
+Happy TLSing!
+
+This code is a bastardised version of the code found in Will Bond's oscrypto
+library. An enormous debt is owed to him for blazing this trail for us. For
+that reason, this code should be considered to be covered both by urllib3's
+license and by oscrypto's:
+
+.. code-block::
+
+    Copyright (c) 2015-2016 Will Bond <will@wbond.net>
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+"""
+from __future__ import absolute_import
+
+import contextlib
+import ctypes
+import errno
+import os.path
+import shutil
+import socket
+import ssl
+import struct
+import threading
+import weakref
+
+from pip._vendor import six
+
+from .. import util
+from ..util.ssl_ import PROTOCOL_TLS_CLIENT
+from ._securetransport.bindings import CoreFoundation, Security, SecurityConst
+from ._securetransport.low_level import (
+    _assert_no_error,
+    _build_tls_unknown_ca_alert,
+    _cert_array_from_pem,
+    _create_cfstring_array,
+    _load_client_cert_chain,
+    _temporary_keychain,
+)
+
+try:  # Platform-specific: Python 2
+    from socket import _fileobject
+except ImportError:  # Platform-specific: Python 3
+    _fileobject = None
+    from ..packages.backports.makefile import backport_makefile
+
+__all__ = ["inject_into_urllib3", "extract_from_urllib3"]
+
+# SNI always works
+HAS_SNI = True
+
+orig_util_HAS_SNI = util.HAS_SNI
+orig_util_SSLContext = util.ssl_.SSLContext
+
+# This dictionary is used by the read callback to obtain a handle to the
+# calling wrapped socket. This is a pretty silly approach, but for now it'll
+# do. I feel like I should be able to smuggle a handle to the wrapped socket
+# directly in the SSLConnectionRef, but for now this approach will work I
+# guess.
+#
+# We need to lock around this structure for inserts, but we don't do it for
+# reads/writes in the callbacks. The reasoning here goes as follows:
+#
+#    1. It is not possible to call into the callbacks before the dictionary is
+#       populated, so once in the callback the id must be in the dictionary.
+#    2. The callbacks don't mutate the dictionary, they only read from it, and
+#       so cannot conflict with any of the insertions.
+#
+# This is good: if we had to lock in the callbacks we'd drastically slow down
+# the performance of this code.
+_connection_refs = weakref.WeakValueDictionary()
+_connection_ref_lock = threading.Lock()
+
+# Limit writes to 16kB. This is OpenSSL's limit, but we'll cargo-cult it over
+# for no better reason than we need *a* limit, and this one is right there.
+SSL_WRITE_BLOCKSIZE = 16384
+
+# This is our equivalent of util.ssl_.DEFAULT_CIPHERS, but expanded out to
+# individual cipher suites. We need to do this because this is how
+# SecureTransport wants them.
+CIPHER_SUITES = [
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_DHE_RSA_WITH_AES_128_CBC_SHA,
+    SecurityConst.TLS_AES_256_GCM_SHA384,
+    SecurityConst.TLS_AES_128_GCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_GCM_SHA384,
+    SecurityConst.TLS_RSA_WITH_AES_128_GCM_SHA256,
+    SecurityConst.TLS_AES_128_CCM_8_SHA256,
+    SecurityConst.TLS_AES_128_CCM_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA256,
+    SecurityConst.TLS_RSA_WITH_AES_256_CBC_SHA,
+    SecurityConst.TLS_RSA_WITH_AES_128_CBC_SHA,
+]
+
+# Basically this is simple: for PROTOCOL_SSLv23 we turn it into a low of
+# TLSv1 and a high of TLSv1.2. For everything else, we pin to that version.
+# TLSv1 to 1.2 are supported on macOS 10.8+
+_protocol_to_min_max = {
+    util.PROTOCOL_TLS: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol12),
+    PROTOCOL_TLS_CLIENT: (SecurityConst.kTLSProtocol1, SecurityConst.kTLSProtocol12),
+}
+
+if hasattr(ssl, "PROTOCOL_SSLv2"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv2] = (
+        SecurityConst.kSSLProtocol2,
+        SecurityConst.kSSLProtocol2,
+    )
+if hasattr(ssl, "PROTOCOL_SSLv3"):
+    _protocol_to_min_max[ssl.PROTOCOL_SSLv3] = (
+        SecurityConst.kSSLProtocol3,
+        SecurityConst.kSSLProtocol3,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1] = (
+        SecurityConst.kTLSProtocol1,
+        SecurityConst.kTLSProtocol1,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_1"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_1] = (
+        SecurityConst.kTLSProtocol11,
+        SecurityConst.kTLSProtocol11,
+    )
+if hasattr(ssl, "PROTOCOL_TLSv1_2"):
+    _protocol_to_min_max[ssl.PROTOCOL_TLSv1_2] = (
+        SecurityConst.kTLSProtocol12,
+        SecurityConst.kTLSProtocol12,
+    )
+
+
+def inject_into_urllib3():
+    """
+    Monkey-patch urllib3 with SecureTransport-backed SSL-support.
+    """
+    util.SSLContext = SecureTransportContext
+    util.ssl_.SSLContext = SecureTransportContext
+    util.HAS_SNI = HAS_SNI
+    util.ssl_.HAS_SNI = HAS_SNI
+    util.IS_SECURETRANSPORT = True
+    util.ssl_.IS_SECURETRANSPORT = True
+
+
+def extract_from_urllib3():
+    """
+    Undo monkey-patching by :func:`inject_into_urllib3`.
+    """
+    util.SSLContext = orig_util_SSLContext
+    util.ssl_.SSLContext = orig_util_SSLContext
+    util.HAS_SNI = orig_util_HAS_SNI
+    util.ssl_.HAS_SNI = orig_util_HAS_SNI
+    util.IS_SECURETRANSPORT = False
+    util.ssl_.IS_SECURETRANSPORT = False
+
+
+def _read_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport read callback. This is called by ST to request that data
+    be returned from the socket.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        requested_length = data_length_pointer[0]
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        read_count = 0
+
+        try:
+            while read_count < requested_length:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_read(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, "timed out")
+
+                remaining = requested_length - read_count
+                buffer = (ctypes.c_char * remaining).from_address(
+                    data_buffer + read_count
+                )
+                chunk_size = base_socket.recv_into(buffer, remaining)
+                read_count += chunk_size
+                if not chunk_size:
+                    if not read_count:
+                        return SecurityConst.errSSLClosedGraceful
+                    break
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = read_count
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = read_count
+
+        if read_count != requested_length:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+def _write_callback(connection_id, data_buffer, data_length_pointer):
+    """
+    SecureTransport write callback. This is called by ST to request that data
+    actually be sent on the network.
+    """
+    wrapped_socket = None
+    try:
+        wrapped_socket = _connection_refs.get(connection_id)
+        if wrapped_socket is None:
+            return SecurityConst.errSSLInternal
+        base_socket = wrapped_socket.socket
+
+        bytes_to_write = data_length_pointer[0]
+        data = ctypes.string_at(data_buffer, bytes_to_write)
+
+        timeout = wrapped_socket.gettimeout()
+        error = None
+        sent = 0
+
+        try:
+            while sent < bytes_to_write:
+                if timeout is None or timeout >= 0:
+                    if not util.wait_for_write(base_socket, timeout):
+                        raise socket.error(errno.EAGAIN, "timed out")
+                chunk_sent = base_socket.send(data)
+                sent += chunk_sent
+
+                # This has some needless copying here, but I'm not sure there's
+                # much value in optimising this data path.
+                data = data[chunk_sent:]
+        except (socket.error) as e:
+            error = e.errno
+
+            if error is not None and error != errno.EAGAIN:
+                data_length_pointer[0] = sent
+                if error == errno.ECONNRESET or error == errno.EPIPE:
+                    return SecurityConst.errSSLClosedAbort
+                raise
+
+        data_length_pointer[0] = sent
+
+        if sent != bytes_to_write:
+            return SecurityConst.errSSLWouldBlock
+
+        return 0
+    except Exception as e:
+        if wrapped_socket is not None:
+            wrapped_socket._exception = e
+        return SecurityConst.errSSLInternal
+
+
+# We need to keep these two objects references alive: if they get GC'd while
+# in use then SecureTransport could attempt to call a function that is in freed
+# memory. That would be...uh...bad. Yeah, that's the word. Bad.
+_read_callback_pointer = Security.SSLReadFunc(_read_callback)
+_write_callback_pointer = Security.SSLWriteFunc(_write_callback)
+
+
+class WrappedSocket(object):
+    """
+    API-compatibility wrapper for Python's OpenSSL wrapped socket object.
+
+    Note: _makefile_refs, _drop(), and _reuse() are needed for the garbage
+    collector of PyPy.
+    """
+
+    def __init__(self, socket):
+        self.socket = socket
+        self.context = None
+        self._makefile_refs = 0
+        self._closed = False
+        self._exception = None
+        self._keychain = None
+        self._keychain_dir = None
+        self._client_cert_chain = None
+
+        # We save off the previously-configured timeout and then set it to
+        # zero. This is done because we use select and friends to handle the
+        # timeouts, but if we leave the timeout set on the lower socket then
+        # Python will "kindly" call select on that socket again for us. Avoid
+        # that by forcing the timeout to zero.
+        self._timeout = self.socket.gettimeout()
+        self.socket.settimeout(0)
+
+    @contextlib.contextmanager
+    def _raise_on_error(self):
+        """
+        A context manager that can be used to wrap calls that do I/O from
+        SecureTransport. If any of the I/O callbacks hit an exception, this
+        context manager will correctly propagate the exception after the fact.
+        This avoids silently swallowing those exceptions.
+
+        It also correctly forces the socket closed.
+        """
+        self._exception = None
+
+        # We explicitly don't catch around this yield because in the unlikely
+        # event that an exception was hit in the block we don't want to swallow
+        # it.
+        yield
+        if self._exception is not None:
+            exception, self._exception = self._exception, None
+            self.close()
+            raise exception
+
+    def _set_ciphers(self):
+        """
+        Sets up the allowed ciphers. By default this matches the set in
+        util.ssl_.DEFAULT_CIPHERS, at least as supported by macOS. This is done
+        custom and doesn't allow changing at this time, mostly because parsing
+        OpenSSL cipher strings is going to be a freaking nightmare.
+        """
+        ciphers = (Security.SSLCipherSuite * len(CIPHER_SUITES))(*CIPHER_SUITES)
+        result = Security.SSLSetEnabledCiphers(
+            self.context, ciphers, len(CIPHER_SUITES)
+        )
+        _assert_no_error(result)
+
+    def _set_alpn_protocols(self, protocols):
+        """
+        Sets up the ALPN protocols on the context.
+        """
+        if not protocols:
+            return
+        protocols_arr = _create_cfstring_array(protocols)
+        try:
+            result = Security.SSLSetALPNProtocols(self.context, protocols_arr)
+            _assert_no_error(result)
+        finally:
+            CoreFoundation.CFRelease(protocols_arr)
+
+    def _custom_validate(self, verify, trust_bundle):
+        """
+        Called when we have set custom validation. We do this in two cases:
+        first, when cert validation is entirely disabled; and second, when
+        using a custom trust DB.
+        Raises an SSLError if the connection is not trusted.
+        """
+        # If we disabled cert validation, just say: cool.
+        if not verify:
+            return
+
+        successes = (
+            SecurityConst.kSecTrustResultUnspecified,
+            SecurityConst.kSecTrustResultProceed,
+        )
+        try:
+            trust_result = self._evaluate_trust(trust_bundle)
+            if trust_result in successes:
+                return
+            reason = "error code: %d" % (trust_result,)
+        except Exception as e:
+            # Do not trust on error
+            reason = "exception: %r" % (e,)
+
+        # SecureTransport does not send an alert nor shuts down the connection.
+        rec = _build_tls_unknown_ca_alert(self.version())
+        self.socket.sendall(rec)
+        # close the connection immediately
+        # l_onoff = 1, activate linger
+        # l_linger = 0, linger for 0 seoncds
+        opts = struct.pack("ii", 1, 0)
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_LINGER, opts)
+        self.close()
+        raise ssl.SSLError("certificate verify failed, %s" % reason)
+
+    def _evaluate_trust(self, trust_bundle):
+        # We want data in memory, so load it up.
+        if os.path.isfile(trust_bundle):
+            with open(trust_bundle, "rb") as f:
+                trust_bundle = f.read()
+
+        cert_array = None
+        trust = Security.SecTrustRef()
+
+        try:
+            # Get a CFArray that contains the certs we want.
+            cert_array = _cert_array_from_pem(trust_bundle)
+
+            # Ok, now the hard part. We want to get the SecTrustRef that ST has
+            # created for this connection, shove our CAs into it, tell ST to
+            # ignore everything else it knows, and then ask if it can build a
+            # chain. This is a buuuunch of code.
+            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
+            _assert_no_error(result)
+            if not trust:
+                raise ssl.SSLError("Failed to copy trust reference")
+
+            result = Security.SecTrustSetAnchorCertificates(trust, cert_array)
+            _assert_no_error(result)
+
+            result = Security.SecTrustSetAnchorCertificatesOnly(trust, True)
+            _assert_no_error(result)
+
+            trust_result = Security.SecTrustResultType()
+            result = Security.SecTrustEvaluate(trust, ctypes.byref(trust_result))
+            _assert_no_error(result)
+        finally:
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+            if cert_array is not None:
+                CoreFoundation.CFRelease(cert_array)
+
+        return trust_result.value
+
+    def handshake(
+        self,
+        server_hostname,
+        verify,
+        trust_bundle,
+        min_version,
+        max_version,
+        client_cert,
+        client_key,
+        client_key_passphrase,
+        alpn_protocols,
+    ):
+        """
+        Actually performs the TLS handshake. This is run automatically by
+        wrapped socket, and shouldn't be needed in user code.
+        """
+        # First, we do the initial bits of connection setup. We need to create
+        # a context, set its I/O funcs, and set the connection reference.
+        self.context = Security.SSLCreateContext(
+            None, SecurityConst.kSSLClientSide, SecurityConst.kSSLStreamType
+        )
+        result = Security.SSLSetIOFuncs(
+            self.context, _read_callback_pointer, _write_callback_pointer
+        )
+        _assert_no_error(result)
+
+        # Here we need to compute the handle to use. We do this by taking the
+        # id of self modulo 2**31 - 1. If this is already in the dictionary, we
+        # just keep incrementing by one until we find a free space.
+        with _connection_ref_lock:
+            handle = id(self) % 2147483647
+            while handle in _connection_refs:
+                handle = (handle + 1) % 2147483647
+            _connection_refs[handle] = self
+
+        result = Security.SSLSetConnection(self.context, handle)
+        _assert_no_error(result)
+
+        # If we have a server hostname, we should set that too.
+        if server_hostname:
+            if not isinstance(server_hostname, bytes):
+                server_hostname = server_hostname.encode("utf-8")
+
+            result = Security.SSLSetPeerDomainName(
+                self.context, server_hostname, len(server_hostname)
+            )
+            _assert_no_error(result)
+
+        # Setup the ciphers.
+        self._set_ciphers()
+
+        # Setup the ALPN protocols.
+        self._set_alpn_protocols(alpn_protocols)
+
+        # Set the minimum and maximum TLS versions.
+        result = Security.SSLSetProtocolVersionMin(self.context, min_version)
+        _assert_no_error(result)
+
+        result = Security.SSLSetProtocolVersionMax(self.context, max_version)
+        _assert_no_error(result)
+
+        # If there's a trust DB, we need to use it. We do that by telling
+        # SecureTransport to break on server auth. We also do that if we don't
+        # want to validate the certs at all: we just won't actually do any
+        # authing in that case.
+        if not verify or trust_bundle is not None:
+            result = Security.SSLSetSessionOption(
+                self.context, SecurityConst.kSSLSessionOptionBreakOnServerAuth, True
+            )
+            _assert_no_error(result)
+
+        # If there's a client cert, we need to use it.
+        if client_cert:
+            self._keychain, self._keychain_dir = _temporary_keychain()
+            self._client_cert_chain = _load_client_cert_chain(
+                self._keychain, client_cert, client_key
+            )
+            result = Security.SSLSetCertificate(self.context, self._client_cert_chain)
+            _assert_no_error(result)
+
+        while True:
+            with self._raise_on_error():
+                result = Security.SSLHandshake(self.context)
+
+                if result == SecurityConst.errSSLWouldBlock:
+                    raise socket.timeout("handshake timed out")
+                elif result == SecurityConst.errSSLServerAuthCompleted:
+                    self._custom_validate(verify, trust_bundle)
+                    continue
+                else:
+                    _assert_no_error(result)
+                    break
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    # Copy-pasted from Python 3.5 source code
+    def _decref_socketios(self):
+        if self._makefile_refs > 0:
+            self._makefile_refs -= 1
+        if self._closed:
+            self.close()
+
+    def recv(self, bufsiz):
+        buffer = ctypes.create_string_buffer(bufsiz)
+        bytes_read = self.recv_into(buffer, bufsiz)
+        data = buffer[:bytes_read]
+        return data
+
+    def recv_into(self, buffer, nbytes=None):
+        # Read short on EOF.
+        if self._closed:
+            return 0
+
+        if nbytes is None:
+            nbytes = len(buffer)
+
+        buffer = (ctypes.c_char * nbytes).from_buffer(buffer)
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLRead(
+                self.context, buffer, nbytes, ctypes.byref(processed_bytes)
+            )
+
+        # There are some result codes that we want to treat as "not always
+        # errors". Specifically, those are errSSLWouldBlock,
+        # errSSLClosedGraceful, and errSSLClosedNoNotify.
+        if result == SecurityConst.errSSLWouldBlock:
+            # If we didn't process any bytes, then this was just a time out.
+            # However, we can get errSSLWouldBlock in situations when we *did*
+            # read some data, and in those cases we should just read "short"
+            # and return.
+            if processed_bytes.value == 0:
+                # Timed out, no data read.
+                raise socket.timeout("recv timed out")
+        elif result in (
+            SecurityConst.errSSLClosedGraceful,
+            SecurityConst.errSSLClosedNoNotify,
+        ):
+            # The remote peer has closed this connection. We should do so as
+            # well. Note that we don't actually return here because in
+            # principle this could actually be fired along with return data.
+            # It's unlikely though.
+            self.close()
+        else:
+            _assert_no_error(result)
+
+        # Ok, we read and probably succeeded. We should return whatever data
+        # was actually read.
+        return processed_bytes.value
+
+    def settimeout(self, timeout):
+        self._timeout = timeout
+
+    def gettimeout(self):
+        return self._timeout
+
+    def send(self, data):
+        processed_bytes = ctypes.c_size_t(0)
+
+        with self._raise_on_error():
+            result = Security.SSLWrite(
+                self.context, data, len(data), ctypes.byref(processed_bytes)
+            )
+
+        if result == SecurityConst.errSSLWouldBlock and processed_bytes.value == 0:
+            # Timed out
+            raise socket.timeout("send timed out")
+        else:
+            _assert_no_error(result)
+
+        # We sent, and probably succeeded. Tell them how much we sent.
+        return processed_bytes.value
+
+    def sendall(self, data):
+        total_sent = 0
+        while total_sent < len(data):
+            sent = self.send(data[total_sent : total_sent + SSL_WRITE_BLOCKSIZE])
+            total_sent += sent
+
+    def shutdown(self):
+        with self._raise_on_error():
+            Security.SSLClose(self.context)
+
+    def close(self):
+        # TODO: should I do clean shutdown here? Do I have to?
+        if self._makefile_refs < 1:
+            self._closed = True
+            if self.context:
+                CoreFoundation.CFRelease(self.context)
+                self.context = None
+            if self._client_cert_chain:
+                CoreFoundation.CFRelease(self._client_cert_chain)
+                self._client_cert_chain = None
+            if self._keychain:
+                Security.SecKeychainDelete(self._keychain)
+                CoreFoundation.CFRelease(self._keychain)
+                shutil.rmtree(self._keychain_dir)
+                self._keychain = self._keychain_dir = None
+            return self.socket.close()
+        else:
+            self._makefile_refs -= 1
+
+    def getpeercert(self, binary_form=False):
+        # Urgh, annoying.
+        #
+        # Here's how we do this:
+        #
+        # 1. Call SSLCopyPeerTrust to get hold of the trust object for this
+        #    connection.
+        # 2. Call SecTrustGetCertificateAtIndex for index 0 to get the leaf.
+        # 3. To get the CN, call SecCertificateCopyCommonName and process that
+        #    string so that it's of the appropriate type.
+        # 4. To get the SAN, we need to do something a bit more complex:
+        #    a. Call SecCertificateCopyValues to get the data, requesting
+        #       kSecOIDSubjectAltName.
+        #    b. Mess about with this dictionary to try to get the SANs out.
+        #
+        # This is gross. Really gross. It's going to be a few hundred LoC extra
+        # just to repeat something that SecureTransport can *already do*. So my
+        # operating assumption at this time is that what we want to do is
+        # instead to just flag to urllib3 that it shouldn't do its own hostname
+        # validation when using SecureTransport.
+        if not binary_form:
+            raise ValueError("SecureTransport only supports dumping binary certs")
+        trust = Security.SecTrustRef()
+        certdata = None
+        der_bytes = None
+
+        try:
+            # Grab the trust store.
+            result = Security.SSLCopyPeerTrust(self.context, ctypes.byref(trust))
+            _assert_no_error(result)
+            if not trust:
+                # Probably we haven't done the handshake yet. No biggie.
+                return None
+
+            cert_count = Security.SecTrustGetCertificateCount(trust)
+            if not cert_count:
+                # Also a case that might happen if we haven't handshaked.
+                # Handshook? Handshaken?
+                return None
+
+            leaf = Security.SecTrustGetCertificateAtIndex(trust, 0)
+            assert leaf
+
+            # Ok, now we want the DER bytes.
+            certdata = Security.SecCertificateCopyData(leaf)
+            assert certdata
+
+            data_length = CoreFoundation.CFDataGetLength(certdata)
+            data_buffer = CoreFoundation.CFDataGetBytePtr(certdata)
+            der_bytes = ctypes.string_at(data_buffer, data_length)
+        finally:
+            if certdata:
+                CoreFoundation.CFRelease(certdata)
+            if trust:
+                CoreFoundation.CFRelease(trust)
+
+        return der_bytes
+
+    def version(self):
+        protocol = Security.SSLProtocol()
+        result = Security.SSLGetNegotiatedProtocolVersion(
+            self.context, ctypes.byref(protocol)
+        )
+        _assert_no_error(result)
+        if protocol.value == SecurityConst.kTLSProtocol13:
+            raise ssl.SSLError("SecureTransport does not support TLS 1.3")
+        elif protocol.value == SecurityConst.kTLSProtocol12:
+            return "TLSv1.2"
+        elif protocol.value == SecurityConst.kTLSProtocol11:
+            return "TLSv1.1"
+        elif protocol.value == SecurityConst.kTLSProtocol1:
+            return "TLSv1"
+        elif protocol.value == SecurityConst.kSSLProtocol3:
+            return "SSLv3"
+        elif protocol.value == SecurityConst.kSSLProtocol2:
+            return "SSLv2"
+        else:
+            raise ssl.SSLError("Unknown TLS version: %r" % protocol)
+
+    def _reuse(self):
+        self._makefile_refs += 1
+
+    def _drop(self):
+        if self._makefile_refs < 1:
+            self.close()
+        else:
+            self._makefile_refs -= 1
+
+
+if _fileobject:  # Platform-specific: Python 2
+
+    def makefile(self, mode, bufsize=-1):
+        self._makefile_refs += 1
+        return _fileobject(self, mode, bufsize, close=True)
+
+else:  # Platform-specific: Python 3
+
+    def makefile(self, mode="r", buffering=None, *args, **kwargs):
+        # We disable buffering with SecureTransport because it conflicts with
+        # the buffering that ST does internally (see issue #1153 for more).
+        buffering = 0
+        return backport_makefile(self, mode, buffering, *args, **kwargs)
+
+
+WrappedSocket.makefile = makefile
+
+
+class SecureTransportContext(object):
+    """
+    I am a wrapper class for the SecureTransport library, to translate the
+    interface of the standard library ``SSLContext`` object to calls into
+    SecureTransport.
+    """
+
+    def __init__(self, protocol):
+        self._min_version, self._max_version = _protocol_to_min_max[protocol]
+        self._options = 0
+        self._verify = False
+        self._trust_bundle = None
+        self._client_cert = None
+        self._client_key = None
+        self._client_key_passphrase = None
+        self._alpn_protocols = None
+
+    @property
+    def check_hostname(self):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        return True
+
+    @check_hostname.setter
+    def check_hostname(self, value):
+        """
+        SecureTransport cannot have its hostname checking disabled. For more,
+        see the comment on getpeercert() in this file.
+        """
+        pass
+
+    @property
+    def options(self):
+        # TODO: Well, crap.
+        #
+        # So this is the bit of the code that is the most likely to cause us
+        # trouble. Essentially we need to enumerate all of the SSL options that
+        # users might want to use and try to see if we can sensibly translate
+        # them, or whether we should just ignore them.
+        return self._options
+
+    @options.setter
+    def options(self, value):
+        # TODO: Update in line with above.
+        self._options = value
+
+    @property
+    def verify_mode(self):
+        return ssl.CERT_REQUIRED if self._verify else ssl.CERT_NONE
+
+    @verify_mode.setter
+    def verify_mode(self, value):
+        self._verify = True if value == ssl.CERT_REQUIRED else False
+
+    def set_default_verify_paths(self):
+        # So, this has to do something a bit weird. Specifically, what it does
+        # is nothing.
+        #
+        # This means that, if we had previously had load_verify_locations
+        # called, this does not undo that. We need to do that because it turns
+        # out that the rest of the urllib3 code will attempt to load the
+        # default verify paths if it hasn't been told about any paths, even if
+        # the context itself was sometime earlier. We resolve that by just
+        # ignoring it.
+        pass
+
+    def load_default_certs(self):
+        return self.set_default_verify_paths()
+
+    def set_ciphers(self, ciphers):
+        # For now, we just require the default cipher string.
+        if ciphers != util.ssl_.DEFAULT_CIPHERS:
+            raise ValueError("SecureTransport doesn't support custom cipher strings")
+
+    def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+        # OK, we only really support cadata and cafile.
+        if capath is not None:
+            raise ValueError("SecureTransport does not support cert directories")
+
+        # Raise if cafile does not exist.
+        if cafile is not None:
+            with open(cafile):
+                pass
+
+        self._trust_bundle = cafile or cadata
+
+    def load_cert_chain(self, certfile, keyfile=None, password=None):
+        self._client_cert = certfile
+        self._client_key = keyfile
+        self._client_cert_passphrase = password
+
+    def set_alpn_protocols(self, protocols):
+        """
+        Sets the ALPN protocols that will later be set on the context.
+
+        Raises a NotImplementedError if ALPN is not supported.
+        """
+        if not hasattr(Security, "SSLSetALPNProtocols"):
+            raise NotImplementedError(
+                "SecureTransport supports ALPN only in macOS 10.12+"
+            )
+        self._alpn_protocols = [six.ensure_binary(p) for p in protocols]
+
+    def wrap_socket(
+        self,
+        sock,
+        server_side=False,
+        do_handshake_on_connect=True,
+        suppress_ragged_eofs=True,
+        server_hostname=None,
+    ):
+        # So, what do we do here? Firstly, we assert some properties. This is a
+        # stripped down shim, so there is some functionality we don't support.
+        # See PEP 543 for the real deal.
+        assert not server_side
+        assert do_handshake_on_connect
+        assert suppress_ragged_eofs
+
+        # Ok, we're good to go. Now we want to create the wrapped socket object
+        # and store it in the appropriate place.
+        wrapped_socket = WrappedSocket(sock)
+
+        # Now we can handshake
+        wrapped_socket.handshake(
+            server_hostname,
+            self._verify,
+            self._trust_bundle,
+            self._min_version,
+            self._max_version,
+            self._client_cert,
+            self._client_key,
+            self._client_key_passphrase,
+            self._alpn_protocols,
+        )
+        return wrapped_socket
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/socks.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/socks.py
new file mode 100644
index 0000000..c326e80
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/contrib/socks.py
@@ -0,0 +1,216 @@
+# -*- coding: utf-8 -*-
+"""
+This module contains provisional support for SOCKS proxies from within
+urllib3. This module supports SOCKS4, SOCKS4A (an extension of SOCKS4), and
+SOCKS5. To enable its functionality, either install PySocks or install this
+module with the ``socks`` extra.
+
+The SOCKS implementation supports the full range of urllib3 features. It also
+supports the following SOCKS features:
+
+- SOCKS4A (``proxy_url='socks4a://...``)
+- SOCKS4 (``proxy_url='socks4://...``)
+- SOCKS5 with remote DNS (``proxy_url='socks5h://...``)
+- SOCKS5 with local DNS (``proxy_url='socks5://...``)
+- Usernames and passwords for the SOCKS proxy
+
+.. note::
+   It is recommended to use ``socks5h://`` or ``socks4a://`` schemes in
+   your ``proxy_url`` to ensure that DNS resolution is done from the remote
+   server instead of client-side when connecting to a domain name.
+
+SOCKS4 supports IPv4 and domain names with the SOCKS4A extension. SOCKS5
+supports IPv4, IPv6, and domain names.
+
+When connecting to a SOCKS4 proxy the ``username`` portion of the ``proxy_url``
+will be sent as the ``userid`` section of the SOCKS request:
+
+.. code-block:: python
+
+    proxy_url="socks4a://<userid>@proxy-host"
+
+When connecting to a SOCKS5 proxy the ``username`` and ``password`` portion
+of the ``proxy_url`` will be sent as the username/password to authenticate
+with the proxy:
+
+.. code-block:: python
+
+    proxy_url="socks5h://<username>:<password>@proxy-host"
+
+"""
+from __future__ import absolute_import
+
+try:
+    import socks
+except ImportError:
+    import warnings
+
+    from ..exceptions import DependencyWarning
+
+    warnings.warn(
+        (
+            "SOCKS support in urllib3 requires the installation of optional "
+            "dependencies: specifically, PySocks.  For more information, see "
+            "https://urllib3.readthedocs.io/en/1.26.x/contrib.html#socks-proxies"
+        ),
+        DependencyWarning,
+    )
+    raise
+
+from socket import error as SocketError
+from socket import timeout as SocketTimeout
+
+from ..connection import HTTPConnection, HTTPSConnection
+from ..connectionpool import HTTPConnectionPool, HTTPSConnectionPool
+from ..exceptions import ConnectTimeoutError, NewConnectionError
+from ..poolmanager import PoolManager
+from ..util.url import parse_url
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+
+class SOCKSConnection(HTTPConnection):
+    """
+    A plain-text HTTP connection that connects via a SOCKS proxy.
+    """
+
+    def __init__(self, *args, **kwargs):
+        self._socks_options = kwargs.pop("_socks_options")
+        super(SOCKSConnection, self).__init__(*args, **kwargs)
+
+    def _new_conn(self):
+        """
+        Establish a new connection via the SOCKS proxy.
+        """
+        extra_kw = {}
+        if self.source_address:
+            extra_kw["source_address"] = self.source_address
+
+        if self.socket_options:
+            extra_kw["socket_options"] = self.socket_options
+
+        try:
+            conn = socks.create_connection(
+                (self.host, self.port),
+                proxy_type=self._socks_options["socks_version"],
+                proxy_addr=self._socks_options["proxy_host"],
+                proxy_port=self._socks_options["proxy_port"],
+                proxy_username=self._socks_options["username"],
+                proxy_password=self._socks_options["password"],
+                proxy_rdns=self._socks_options["rdns"],
+                timeout=self.timeout,
+                **extra_kw
+            )
+
+        except SocketTimeout:
+            raise ConnectTimeoutError(
+                self,
+                "Connection to %s timed out. (connect timeout=%s)"
+                % (self.host, self.timeout),
+            )
+
+        except socks.ProxyError as e:
+            # This is fragile as hell, but it seems to be the only way to raise
+            # useful errors here.
+            if e.socket_err:
+                error = e.socket_err
+                if isinstance(error, SocketTimeout):
+                    raise ConnectTimeoutError(
+                        self,
+                        "Connection to %s timed out. (connect timeout=%s)"
+                        % (self.host, self.timeout),
+                    )
+                else:
+                    raise NewConnectionError(
+                        self, "Failed to establish a new connection: %s" % error
+                    )
+            else:
+                raise NewConnectionError(
+                    self, "Failed to establish a new connection: %s" % e
+                )
+
+        except SocketError as e:  # Defensive: PySocks should catch all these.
+            raise NewConnectionError(
+                self, "Failed to establish a new connection: %s" % e
+            )
+
+        return conn
+
+
+# We don't need to duplicate the Verified/Unverified distinction from
+# urllib3/connection.py here because the HTTPSConnection will already have been
+# correctly set to either the Verified or Unverified form by that module. This
+# means the SOCKSHTTPSConnection will automatically be the correct type.
+class SOCKSHTTPSConnection(SOCKSConnection, HTTPSConnection):
+    pass
+
+
+class SOCKSHTTPConnectionPool(HTTPConnectionPool):
+    ConnectionCls = SOCKSConnection
+
+
+class SOCKSHTTPSConnectionPool(HTTPSConnectionPool):
+    ConnectionCls = SOCKSHTTPSConnection
+
+
+class SOCKSProxyManager(PoolManager):
+    """
+    A version of the urllib3 ProxyManager that routes connections via the
+    defined SOCKS proxy.
+    """
+
+    pool_classes_by_scheme = {
+        "http": SOCKSHTTPConnectionPool,
+        "https": SOCKSHTTPSConnectionPool,
+    }
+
+    def __init__(
+        self,
+        proxy_url,
+        username=None,
+        password=None,
+        num_pools=10,
+        headers=None,
+        **connection_pool_kw
+    ):
+        parsed = parse_url(proxy_url)
+
+        if username is None and password is None and parsed.auth is not None:
+            split = parsed.auth.split(":")
+            if len(split) == 2:
+                username, password = split
+        if parsed.scheme == "socks5":
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = False
+        elif parsed.scheme == "socks5h":
+            socks_version = socks.PROXY_TYPE_SOCKS5
+            rdns = True
+        elif parsed.scheme == "socks4":
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = False
+        elif parsed.scheme == "socks4a":
+            socks_version = socks.PROXY_TYPE_SOCKS4
+            rdns = True
+        else:
+            raise ValueError("Unable to determine SOCKS version from %s" % proxy_url)
+
+        self.proxy_url = proxy_url
+
+        socks_options = {
+            "socks_version": socks_version,
+            "proxy_host": parsed.host,
+            "proxy_port": parsed.port,
+            "username": username,
+            "password": password,
+            "rdns": rdns,
+        }
+        connection_pool_kw["_socks_options"] = socks_options
+
+        super(SOCKSProxyManager, self).__init__(
+            num_pools, headers, **connection_pool_kw
+        )
+
+        self.pool_classes_by_scheme = SOCKSProxyManager.pool_classes_by_scheme
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/exceptions.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/exceptions.py
new file mode 100644
index 0000000..cba6f3f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/exceptions.py
@@ -0,0 +1,323 @@
+from __future__ import absolute_import
+
+from .packages.six.moves.http_client import IncompleteRead as httplib_IncompleteRead
+
+# Base Exceptions
+
+
+class HTTPError(Exception):
+    """Base exception used by this module."""
+
+    pass
+
+
+class HTTPWarning(Warning):
+    """Base warning used by this module."""
+
+    pass
+
+
+class PoolError(HTTPError):
+    """Base exception for errors caused within a pool."""
+
+    def __init__(self, pool, message):
+        self.pool = pool
+        HTTPError.__init__(self, "%s: %s" % (pool, message))
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, None)
+
+
+class RequestError(PoolError):
+    """Base exception for PoolErrors that have associated URLs."""
+
+    def __init__(self, pool, url, message):
+        self.url = url
+        PoolError.__init__(self, pool, message)
+
+    def __reduce__(self):
+        # For pickling purposes.
+        return self.__class__, (None, self.url, None)
+
+
+class SSLError(HTTPError):
+    """Raised when SSL certificate fails in an HTTPS connection."""
+
+    pass
+
+
+class ProxyError(HTTPError):
+    """Raised when the connection to a proxy fails."""
+
+    def __init__(self, message, error, *args):
+        super(ProxyError, self).__init__(message, error, *args)
+        self.original_error = error
+
+
+class DecodeError(HTTPError):
+    """Raised when automatic decoding based on Content-Type fails."""
+
+    pass
+
+
+class ProtocolError(HTTPError):
+    """Raised when something unexpected happens mid-request/response."""
+
+    pass
+
+
+#: Renamed to ProtocolError but aliased for backwards compatibility.
+ConnectionError = ProtocolError
+
+
+# Leaf Exceptions
+
+
+class MaxRetryError(RequestError):
+    """Raised when the maximum number of retries is exceeded.
+
+    :param pool: The connection pool
+    :type pool: :class:`~urllib3.connectionpool.HTTPConnectionPool`
+    :param string url: The requested Url
+    :param exceptions.Exception reason: The underlying error
+
+    """
+
+    def __init__(self, pool, url, reason=None):
+        self.reason = reason
+
+        message = "Max retries exceeded with url: %s (Caused by %r)" % (url, reason)
+
+        RequestError.__init__(self, pool, url, message)
+
+
+class HostChangedError(RequestError):
+    """Raised when an existing pool gets a request for a foreign host."""
+
+    def __init__(self, pool, url, retries=3):
+        message = "Tried to open a foreign host with url: %s" % url
+        RequestError.__init__(self, pool, url, message)
+        self.retries = retries
+
+
+class TimeoutStateError(HTTPError):
+    """Raised when passing an invalid state to a timeout"""
+
+    pass
+
+
+class TimeoutError(HTTPError):
+    """Raised when a socket timeout error occurs.
+
+    Catching this error will catch both :exc:`ReadTimeoutErrors
+    <ReadTimeoutError>` and :exc:`ConnectTimeoutErrors <ConnectTimeoutError>`.
+    """
+
+    pass
+
+
+class ReadTimeoutError(TimeoutError, RequestError):
+    """Raised when a socket timeout occurs while receiving data from a server"""
+
+    pass
+
+
+# This timeout error does not have a URL attached and needs to inherit from the
+# base HTTPError
+class ConnectTimeoutError(TimeoutError):
+    """Raised when a socket timeout occurs while connecting to a server"""
+
+    pass
+
+
+class NewConnectionError(ConnectTimeoutError, PoolError):
+    """Raised when we fail to establish a new connection. Usually ECONNREFUSED."""
+
+    pass
+
+
+class EmptyPoolError(PoolError):
+    """Raised when a pool runs out of connections and no more are allowed."""
+
+    pass
+
+
+class ClosedPoolError(PoolError):
+    """Raised when a request enters a pool after the pool has been closed."""
+
+    pass
+
+
+class LocationValueError(ValueError, HTTPError):
+    """Raised when there is something wrong with a given URL input."""
+
+    pass
+
+
+class LocationParseError(LocationValueError):
+    """Raised when get_host or similar fails to parse the URL input."""
+
+    def __init__(self, location):
+        message = "Failed to parse: %s" % location
+        HTTPError.__init__(self, message)
+
+        self.location = location
+
+
+class URLSchemeUnknown(LocationValueError):
+    """Raised when a URL input has an unsupported scheme."""
+
+    def __init__(self, scheme):
+        message = "Not supported URL scheme %s" % scheme
+        super(URLSchemeUnknown, self).__init__(message)
+
+        self.scheme = scheme
+
+
+class ResponseError(HTTPError):
+    """Used as a container for an error reason supplied in a MaxRetryError."""
+
+    GENERIC_ERROR = "too many error responses"
+    SPECIFIC_ERROR = "too many {status_code} error responses"
+
+
+class SecurityWarning(HTTPWarning):
+    """Warned when performing security reducing actions"""
+
+    pass
+
+
+class SubjectAltNameWarning(SecurityWarning):
+    """Warned when connecting to a host with a certificate missing a SAN."""
+
+    pass
+
+
+class InsecureRequestWarning(SecurityWarning):
+    """Warned when making an unverified HTTPS request."""
+
+    pass
+
+
+class SystemTimeWarning(SecurityWarning):
+    """Warned when system time is suspected to be wrong"""
+
+    pass
+
+
+class InsecurePlatformWarning(SecurityWarning):
+    """Warned when certain TLS/SSL configuration is not available on a platform."""
+
+    pass
+
+
+class SNIMissingWarning(HTTPWarning):
+    """Warned when making a HTTPS request without SNI available."""
+
+    pass
+
+
+class DependencyWarning(HTTPWarning):
+    """
+    Warned when an attempt is made to import a module with missing optional
+    dependencies.
+    """
+
+    pass
+
+
+class ResponseNotChunked(ProtocolError, ValueError):
+    """Response needs to be chunked in order to read it as chunks."""
+
+    pass
+
+
+class BodyNotHttplibCompatible(HTTPError):
+    """
+    Body should be :class:`http.client.HTTPResponse` like
+    (have an fp attribute which returns raw chunks) for read_chunked().
+    """
+
+    pass
+
+
+class IncompleteRead(HTTPError, httplib_IncompleteRead):
+    """
+    Response length doesn't match expected Content-Length
+
+    Subclass of :class:`http.client.IncompleteRead` to allow int value
+    for ``partial`` to avoid creating large objects on streamed reads.
+    """
+
+    def __init__(self, partial, expected):
+        super(IncompleteRead, self).__init__(partial, expected)
+
+    def __repr__(self):
+        return "IncompleteRead(%i bytes read, %i more expected)" % (
+            self.partial,
+            self.expected,
+        )
+
+
+class InvalidChunkLength(HTTPError, httplib_IncompleteRead):
+    """Invalid chunk length in a chunked response."""
+
+    def __init__(self, response, length):
+        super(InvalidChunkLength, self).__init__(
+            response.tell(), response.length_remaining
+        )
+        self.response = response
+        self.length = length
+
+    def __repr__(self):
+        return "InvalidChunkLength(got length %r, %i bytes read)" % (
+            self.length,
+            self.partial,
+        )
+
+
+class InvalidHeader(HTTPError):
+    """The header provided was somehow invalid."""
+
+    pass
+
+
+class ProxySchemeUnknown(AssertionError, URLSchemeUnknown):
+    """ProxyManager does not support the supplied scheme"""
+
+    # TODO(t-8ch): Stop inheriting from AssertionError in v2.0.
+
+    def __init__(self, scheme):
+        # 'localhost' is here because our URL parser parses
+        # localhost:8080 -> scheme=localhost, remove if we fix this.
+        if scheme == "localhost":
+            scheme = None
+        if scheme is None:
+            message = "Proxy URL had no scheme, should start with http:// or https://"
+        else:
+            message = (
+                "Proxy URL had unsupported scheme %s, should use http:// or https://"
+                % scheme
+            )
+        super(ProxySchemeUnknown, self).__init__(message)
+
+
+class ProxySchemeUnsupported(ValueError):
+    """Fetching HTTPS resources through HTTPS proxies is unsupported"""
+
+    pass
+
+
+class HeaderParsingError(HTTPError):
+    """Raised by assert_header_parsing, but we convert it to a log.warning statement."""
+
+    def __init__(self, defects, unparsed_data):
+        message = "%s, unparsed data: %r" % (defects or "Unknown", unparsed_data)
+        super(HeaderParsingError, self).__init__(message)
+
+
+class UnrewindableBodyError(HTTPError):
+    """urllib3 encountered an error when trying to rewind a body"""
+
+    pass
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/fields.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/fields.py
new file mode 100644
index 0000000..9d630f4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/fields.py
@@ -0,0 +1,274 @@
+from __future__ import absolute_import
+
+import email.utils
+import mimetypes
+import re
+
+from .packages import six
+
+
+def guess_content_type(filename, default="application/octet-stream"):
+    """
+    Guess the "Content-Type" of a file.
+
+    :param filename:
+        The filename to guess the "Content-Type" of using :mod:`mimetypes`.
+    :param default:
+        If no "Content-Type" can be guessed, default to `default`.
+    """
+    if filename:
+        return mimetypes.guess_type(filename)[0] or default
+    return default
+
+
+def format_header_param_rfc2231(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    strategy defined in RFC 2231.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows
+    `RFC 2388 Section 4.4 <https://tools.ietf.org/html/rfc2388#section-4.4>`_.
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        An RFC-2231-formatted unicode string.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    if not any(ch in value for ch in '"\\\r\n'):
+        result = u'%s="%s"' % (name, value)
+        try:
+            result.encode("ascii")
+        except (UnicodeEncodeError, UnicodeDecodeError):
+            pass
+        else:
+            return result
+
+    if six.PY2:  # Python 2:
+        value = value.encode("utf-8")
+
+    # encode_rfc2231 accepts an encoded string and returns an ascii-encoded
+    # string in Python 2 but accepts and returns unicode strings in Python 3
+    value = email.utils.encode_rfc2231(value, "utf-8")
+    value = "%s*=%s" % (name, value)
+
+    if six.PY2:  # Python 2:
+        value = value.decode("utf-8")
+
+    return value
+
+
+_HTML5_REPLACEMENTS = {
+    u"\u0022": u"%22",
+    # Replace "\" with "\\".
+    u"\u005C": u"\u005C\u005C",
+}
+
+# All control characters from 0x00 to 0x1F *except* 0x1B.
+_HTML5_REPLACEMENTS.update(
+    {
+        six.unichr(cc): u"%{:02X}".format(cc)
+        for cc in range(0x00, 0x1F + 1)
+        if cc not in (0x1B,)
+    }
+)
+
+
+def _replace_multiple(value, needles_and_replacements):
+    def replacer(match):
+        return needles_and_replacements[match.group(0)]
+
+    pattern = re.compile(
+        r"|".join([re.escape(needle) for needle in needles_and_replacements.keys()])
+    )
+
+    result = pattern.sub(replacer, value)
+
+    return result
+
+
+def format_header_param_html5(name, value):
+    """
+    Helper function to format and quote a single header parameter using the
+    HTML5 strategy.
+
+    Particularly useful for header parameters which might contain
+    non-ASCII values, like file names. This follows the `HTML5 Working Draft
+    Section 4.10.22.7`_ and matches the behavior of curl and modern browsers.
+
+    .. _HTML5 Working Draft Section 4.10.22.7:
+        https://w3c.github.io/html/sec-forms.html#multipart-form-data
+
+    :param name:
+        The name of the parameter, a string expected to be ASCII only.
+    :param value:
+        The value of the parameter, provided as ``bytes`` or `str``.
+    :ret:
+        A unicode string, stripped of troublesome characters.
+    """
+    if isinstance(value, six.binary_type):
+        value = value.decode("utf-8")
+
+    value = _replace_multiple(value, _HTML5_REPLACEMENTS)
+
+    return u'%s="%s"' % (name, value)
+
+
+# For backwards-compatibility.
+format_header_param = format_header_param_html5
+
+
+class RequestField(object):
+    """
+    A data container for request body parameters.
+
+    :param name:
+        The name of this request field. Must be unicode.
+    :param data:
+        The data/value body.
+    :param filename:
+        An optional filename of the request field. Must be unicode.
+    :param headers:
+        An optional dict-like object of headers to initially use for the field.
+    :param header_formatter:
+        An optional callable that is used to encode and format the headers. By
+        default, this is :func:`format_header_param_html5`.
+    """
+
+    def __init__(
+        self,
+        name,
+        data,
+        filename=None,
+        headers=None,
+        header_formatter=format_header_param_html5,
+    ):
+        self._name = name
+        self._filename = filename
+        self.data = data
+        self.headers = {}
+        if headers:
+            self.headers = dict(headers)
+        self.header_formatter = header_formatter
+
+    @classmethod
+    def from_tuples(cls, fieldname, value, header_formatter=format_header_param_html5):
+        """
+        A :class:`~urllib3.fields.RequestField` factory from old-style tuple parameters.
+
+        Supports constructing :class:`~urllib3.fields.RequestField` from
+        parameter of key/value strings AND key/filetuple. A filetuple is a
+        (filename, data, MIME type) tuple where the MIME type is optional.
+        For example::
+
+            'foo': 'bar',
+            'fakefile': ('foofile.txt', 'contents of foofile'),
+            'realfile': ('barfile.txt', open('realfile').read()),
+            'typedfile': ('bazfile.bin', open('bazfile').read(), 'image/jpeg'),
+            'nonamefile': 'contents of nonamefile field',
+
+        Field names and filenames must be unicode.
+        """
+        if isinstance(value, tuple):
+            if len(value) == 3:
+                filename, data, content_type = value
+            else:
+                filename, data = value
+                content_type = guess_content_type(filename)
+        else:
+            filename = None
+            content_type = None
+            data = value
+
+        request_param = cls(
+            fieldname, data, filename=filename, header_formatter=header_formatter
+        )
+        request_param.make_multipart(content_type=content_type)
+
+        return request_param
+
+    def _render_part(self, name, value):
+        """
+        Overridable helper function to format a single header parameter. By
+        default, this calls ``self.header_formatter``.
+
+        :param name:
+            The name of the parameter, a string expected to be ASCII only.
+        :param value:
+            The value of the parameter, provided as a unicode string.
+        """
+
+        return self.header_formatter(name, value)
+
+    def _render_parts(self, header_parts):
+        """
+        Helper function to format and quote a single header.
+
+        Useful for single headers that are composed of multiple items. E.g.,
+        'Content-Disposition' fields.
+
+        :param header_parts:
+            A sequence of (k, v) tuples or a :class:`dict` of (k, v) to format
+            as `k1="v1"; k2="v2"; ...`.
+        """
+        parts = []
+        iterable = header_parts
+        if isinstance(header_parts, dict):
+            iterable = header_parts.items()
+
+        for name, value in iterable:
+            if value is not None:
+                parts.append(self._render_part(name, value))
+
+        return u"; ".join(parts)
+
+    def render_headers(self):
+        """
+        Renders the headers for this request field.
+        """
+        lines = []
+
+        sort_keys = ["Content-Disposition", "Content-Type", "Content-Location"]
+        for sort_key in sort_keys:
+            if self.headers.get(sort_key, False):
+                lines.append(u"%s: %s" % (sort_key, self.headers[sort_key]))
+
+        for header_name, header_value in self.headers.items():
+            if header_name not in sort_keys:
+                if header_value:
+                    lines.append(u"%s: %s" % (header_name, header_value))
+
+        lines.append(u"\r\n")
+        return u"\r\n".join(lines)
+
+    def make_multipart(
+        self, content_disposition=None, content_type=None, content_location=None
+    ):
+        """
+        Makes this request field into a multipart request field.
+
+        This method overrides "Content-Disposition", "Content-Type" and
+        "Content-Location" headers to the request parameter.
+
+        :param content_type:
+            The 'Content-Type' of the request body.
+        :param content_location:
+            The 'Content-Location' of the request body.
+
+        """
+        self.headers["Content-Disposition"] = content_disposition or u"form-data"
+        self.headers["Content-Disposition"] += u"; ".join(
+            [
+                u"",
+                self._render_parts(
+                    ((u"name", self._name), (u"filename", self._filename))
+                ),
+            ]
+        )
+        self.headers["Content-Type"] = content_type
+        self.headers["Content-Location"] = content_location
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/filepost.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/filepost.py
new file mode 100644
index 0000000..36c9252
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/filepost.py
@@ -0,0 +1,98 @@
+from __future__ import absolute_import
+
+import binascii
+import codecs
+import os
+from io import BytesIO
+
+from .fields import RequestField
+from .packages import six
+from .packages.six import b
+
+writer = codecs.lookup("utf-8")[3]
+
+
+def choose_boundary():
+    """
+    Our embarrassingly-simple replacement for mimetools.choose_boundary.
+    """
+    boundary = binascii.hexlify(os.urandom(16))
+    if not six.PY2:
+        boundary = boundary.decode("ascii")
+    return boundary
+
+
+def iter_field_objects(fields):
+    """
+    Iterate over fields.
+
+    Supports list of (k, v) tuples and dicts, and lists of
+    :class:`~urllib3.fields.RequestField`.
+
+    """
+    if isinstance(fields, dict):
+        i = six.iteritems(fields)
+    else:
+        i = iter(fields)
+
+    for field in i:
+        if isinstance(field, RequestField):
+            yield field
+        else:
+            yield RequestField.from_tuples(*field)
+
+
+def iter_fields(fields):
+    """
+    .. deprecated:: 1.6
+
+    Iterate over fields.
+
+    The addition of :class:`~urllib3.fields.RequestField` makes this function
+    obsolete. Instead, use :func:`iter_field_objects`, which returns
+    :class:`~urllib3.fields.RequestField` objects.
+
+    Supports list of (k, v) tuples and dicts.
+    """
+    if isinstance(fields, dict):
+        return ((k, v) for k, v in six.iteritems(fields))
+
+    return ((k, v) for k, v in fields)
+
+
+def encode_multipart_formdata(fields, boundary=None):
+    """
+    Encode a dictionary of ``fields`` using the multipart/form-data MIME format.
+
+    :param fields:
+        Dictionary of fields or list of (key, :class:`~urllib3.fields.RequestField`).
+
+    :param boundary:
+        If not specified, then a random boundary will be generated using
+        :func:`urllib3.filepost.choose_boundary`.
+    """
+    body = BytesIO()
+    if boundary is None:
+        boundary = choose_boundary()
+
+    for field in iter_field_objects(fields):
+        body.write(b("--%s\r\n" % (boundary)))
+
+        writer(body).write(field.render_headers())
+        data = field.data
+
+        if isinstance(data, int):
+            data = str(data)  # Backwards compatibility
+
+        if isinstance(data, six.text_type):
+            writer(body).write(data)
+        else:
+            body.write(data)
+
+        body.write(b"\r\n")
+
+    body.write(b("--%s--\r\n" % (boundary)))
+
+    content_type = str("multipart/form-data; boundary=%s" % boundary)
+
+    return body.getvalue(), content_type
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/__init__.py
new file mode 100644
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new file mode 100644
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new file mode 100644
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py
new file mode 100644
index 0000000..e69de29
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..f4457ea
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Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-39.pyc
new file mode 100644
index 0000000..a0f919a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/__pycache__/makefile.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
new file mode 100644
index 0000000..b8fb215
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/backports/makefile.py
@@ -0,0 +1,51 @@
+# -*- coding: utf-8 -*-
+"""
+backports.makefile
+~~~~~~~~~~~~~~~~~~
+
+Backports the Python 3 ``socket.makefile`` method for use with anything that
+wants to create a "fake" socket object.
+"""
+import io
+from socket import SocketIO
+
+
+def backport_makefile(
+    self, mode="r", buffering=None, encoding=None, errors=None, newline=None
+):
+    """
+    Backport of ``socket.makefile`` from Python 3.5.
+    """
+    if not set(mode) <= {"r", "w", "b"}:
+        raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,))
+    writing = "w" in mode
+    reading = "r" in mode or not writing
+    assert reading or writing
+    binary = "b" in mode
+    rawmode = ""
+    if reading:
+        rawmode += "r"
+    if writing:
+        rawmode += "w"
+    raw = SocketIO(self, rawmode)
+    self._makefile_refs += 1
+    if buffering is None:
+        buffering = -1
+    if buffering < 0:
+        buffering = io.DEFAULT_BUFFER_SIZE
+    if buffering == 0:
+        if not binary:
+            raise ValueError("unbuffered streams must be binary")
+        return raw
+    if reading and writing:
+        buffer = io.BufferedRWPair(raw, raw, buffering)
+    elif reading:
+        buffer = io.BufferedReader(raw, buffering)
+    else:
+        assert writing
+        buffer = io.BufferedWriter(raw, buffering)
+    if binary:
+        return buffer
+    text = io.TextIOWrapper(buffer, encoding, errors, newline)
+    text.mode = mode
+    return text
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/six.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/six.py
new file mode 100644
index 0000000..f099a3d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/packages/six.py
@@ -0,0 +1,1076 @@
+# Copyright (c) 2010-2020 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.16.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = (str,)
+    integer_types = (int,)
+    class_types = (type,)
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = (basestring,)
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+            def __len__(self):
+                return 1 << 31
+
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+if PY34:
+    from importlib.util import spec_from_loader
+else:
+    spec_from_loader = None
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def find_spec(self, fullname, path, target=None):
+        if fullname in self.known_modules:
+            return spec_from_loader(fullname, self)
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+
+    get_source = get_code  # same as get_code
+
+    def create_module(self, spec):
+        return self.load_module(spec.name)
+
+    def exec_module(self, module):
+        pass
+
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute(
+        "filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"
+    ),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("getoutput", "commands", "subprocess"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute(
+        "reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"
+    ),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute(
+        "zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"
+    ),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule(
+        "collections_abc",
+        "collections",
+        "collections.abc" if sys.version_info >= (3, 3) else "collections",
+    ),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("dbm_ndbm", "dbm", "dbm.ndbm"),
+    MovedModule(
+        "_dummy_thread",
+        "dummy_thread",
+        "_dummy_thread" if sys.version_info < (3, 9) else "_thread",
+    ),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("email_mime_image", "email.MIMEImage", "email.mime.image"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule(
+        "email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"
+    ),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser", "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog", "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog", "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute(
+        "unquote_to_bytes", "urllib", "urllib.parse", "unquote", "unquote_to_bytes"
+    ),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("splitvalue", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+    "moves.urllib_parse",
+    "moves.urllib.parse",
+)
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+    "moves.urllib_error",
+    "moves.urllib.error",
+)
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+    MovedAttribute("parse_http_list", "urllib2", "urllib.request"),
+    MovedAttribute("parse_keqv_list", "urllib2", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+    "moves.urllib_request",
+    "moves.urllib.request",
+)
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(
+    Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+    "moves.urllib_response",
+    "moves.urllib.response",
+)
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = (
+    _urllib_robotparser_moved_attributes
+)
+
+_importer._add_module(
+    Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+    "moves.urllib_robotparser",
+    "moves.urllib.robotparser",
+)
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ["parse", "error", "request", "response", "robotparser"]
+
+
+_importer._add_module(
+    Module_six_moves_urllib(__name__ + ".moves.urllib"), "moves.urllib"
+)
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+
+    def advance_iterator(it):
+        return it.next()
+
+
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(
+    get_unbound_function, """Get the function out of a possibly unbound function"""
+)
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems, "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(
+    iterlists, "Return an iterator over the (key, [values]) pairs of a dictionary."
+)
+
+
+if PY3:
+
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+
+    unichr = chr
+    import struct
+
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    del io
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+        _assertNotRegex = "assertNotRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+        _assertNotRegex = "assertNotRegex"
+else:
+
+    def b(s):
+        return s
+
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r"\\", r"\\\\"), "unicode_escape")
+
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+    _assertNotRegex = "assertNotRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+def assertNotRegex(self, *args, **kwargs):
+    return getattr(self, _assertNotRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        try:
+            if value is None:
+                value = tp()
+            if value.__traceback__ is not tb:
+                raise value.with_traceback(tb)
+            raise value
+        finally:
+            value = None
+            tb = None
+
+else:
+
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec ("""exec _code_ in _globs_, _locs_""")
+
+    exec_(
+        """def reraise(tp, value, tb=None):
+    try:
+        raise tp, value, tb
+    finally:
+        tb = None
+"""
+    )
+
+
+if sys.version_info[:2] > (3,):
+    exec_(
+        """def raise_from(value, from_value):
+    try:
+        raise value from from_value
+    finally:
+        value = None
+"""
+    )
+else:
+
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (
+                isinstance(fp, file)
+                and isinstance(data, unicode)
+                and fp.encoding is not None
+            ):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+
+
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    # This does exactly the same what the :func:`py3:functools.update_wrapper`
+    # function does on Python versions after 3.2. It sets the ``__wrapped__``
+    # attribute on ``wrapper`` object and it doesn't raise an error if any of
+    # the attributes mentioned in ``assigned`` and ``updated`` are missing on
+    # ``wrapped`` object.
+    def _update_wrapper(
+        wrapper,
+        wrapped,
+        assigned=functools.WRAPPER_ASSIGNMENTS,
+        updated=functools.WRAPPER_UPDATES,
+    ):
+        for attr in assigned:
+            try:
+                value = getattr(wrapped, attr)
+            except AttributeError:
+                continue
+            else:
+                setattr(wrapper, attr, value)
+        for attr in updated:
+            getattr(wrapper, attr).update(getattr(wrapped, attr, {}))
+        wrapper.__wrapped__ = wrapped
+        return wrapper
+
+    _update_wrapper.__doc__ = functools.update_wrapper.__doc__
+
+    def wraps(
+        wrapped,
+        assigned=functools.WRAPPER_ASSIGNMENTS,
+        updated=functools.WRAPPER_UPDATES,
+    ):
+        return functools.partial(
+            _update_wrapper, wrapped=wrapped, assigned=assigned, updated=updated
+        )
+
+    wraps.__doc__ = functools.wraps.__doc__
+
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(type):
+        def __new__(cls, name, this_bases, d):
+            if sys.version_info[:2] >= (3, 7):
+                # This version introduced PEP 560 that requires a bit
+                # of extra care (we mimic what is done by __build_class__).
+                resolved_bases = types.resolve_bases(bases)
+                if resolved_bases is not bases:
+                    d["__orig_bases__"] = bases
+            else:
+                resolved_bases = bases
+            return meta(name, resolved_bases, d)
+
+        @classmethod
+        def __prepare__(cls, name, this_bases):
+            return meta.__prepare__(name, bases)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get("__slots__")
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop("__dict__", None)
+        orig_vars.pop("__weakref__", None)
+        if hasattr(cls, "__qualname__"):
+            orig_vars["__qualname__"] = cls.__qualname__
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+
+    return wrapper
+
+
+def ensure_binary(s, encoding="utf-8", errors="strict"):
+    """Coerce **s** to six.binary_type.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> encoded to `bytes`
+      - `bytes` -> `bytes`
+    """
+    if isinstance(s, binary_type):
+        return s
+    if isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    raise TypeError("not expecting type '%s'" % type(s))
+
+
+def ensure_str(s, encoding="utf-8", errors="strict"):
+    """Coerce *s* to `str`.
+
+    For Python 2:
+      - `unicode` -> encoded to `str`
+      - `str` -> `str`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    # Optimization: Fast return for the common case.
+    if type(s) is str:
+        return s
+    if PY2 and isinstance(s, text_type):
+        return s.encode(encoding, errors)
+    elif PY3 and isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif not isinstance(s, (text_type, binary_type)):
+        raise TypeError("not expecting type '%s'" % type(s))
+    return s
+
+
+def ensure_text(s, encoding="utf-8", errors="strict"):
+    """Coerce *s* to six.text_type.
+
+    For Python 2:
+      - `unicode` -> `unicode`
+      - `str` -> `unicode`
+
+    For Python 3:
+      - `str` -> `str`
+      - `bytes` -> decoded to `str`
+    """
+    if isinstance(s, binary_type):
+        return s.decode(encoding, errors)
+    elif isinstance(s, text_type):
+        return s
+    else:
+        raise TypeError("not expecting type '%s'" % type(s))
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A class decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if "__str__" not in klass.__dict__:
+            raise ValueError(
+                "@python_2_unicode_compatible cannot be applied "
+                "to %s because it doesn't define __str__()." % klass.__name__
+            )
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode("utf-8")
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (
+            type(importer).__name__ == "_SixMetaPathImporter"
+            and importer.name == __name__
+        ):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/poolmanager.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/poolmanager.py
new file mode 100644
index 0000000..ca4ec34
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/poolmanager.py
@@ -0,0 +1,537 @@
+from __future__ import absolute_import
+
+import collections
+import functools
+import logging
+
+from ._collections import RecentlyUsedContainer
+from .connectionpool import HTTPConnectionPool, HTTPSConnectionPool, port_by_scheme
+from .exceptions import (
+    LocationValueError,
+    MaxRetryError,
+    ProxySchemeUnknown,
+    ProxySchemeUnsupported,
+    URLSchemeUnknown,
+)
+from .packages import six
+from .packages.six.moves.urllib.parse import urljoin
+from .request import RequestMethods
+from .util.proxy import connection_requires_http_tunnel
+from .util.retry import Retry
+from .util.url import parse_url
+
+__all__ = ["PoolManager", "ProxyManager", "proxy_from_url"]
+
+
+log = logging.getLogger(__name__)
+
+SSL_KEYWORDS = (
+    "key_file",
+    "cert_file",
+    "cert_reqs",
+    "ca_certs",
+    "ssl_version",
+    "ca_cert_dir",
+    "ssl_context",
+    "key_password",
+    "server_hostname",
+)
+
+# All known keyword arguments that could be provided to the pool manager, its
+# pools, or the underlying connections. This is used to construct a pool key.
+_key_fields = (
+    "key_scheme",  # str
+    "key_host",  # str
+    "key_port",  # int
+    "key_timeout",  # int or float or Timeout
+    "key_retries",  # int or Retry
+    "key_strict",  # bool
+    "key_block",  # bool
+    "key_source_address",  # str
+    "key_key_file",  # str
+    "key_key_password",  # str
+    "key_cert_file",  # str
+    "key_cert_reqs",  # str
+    "key_ca_certs",  # str
+    "key_ssl_version",  # str
+    "key_ca_cert_dir",  # str
+    "key_ssl_context",  # instance of ssl.SSLContext or urllib3.util.ssl_.SSLContext
+    "key_maxsize",  # int
+    "key_headers",  # dict
+    "key__proxy",  # parsed proxy url
+    "key__proxy_headers",  # dict
+    "key__proxy_config",  # class
+    "key_socket_options",  # list of (level (int), optname (int), value (int or str)) tuples
+    "key__socks_options",  # dict
+    "key_assert_hostname",  # bool or string
+    "key_assert_fingerprint",  # str
+    "key_server_hostname",  # str
+)
+
+#: The namedtuple class used to construct keys for the connection pool.
+#: All custom key schemes should include the fields in this key at a minimum.
+PoolKey = collections.namedtuple("PoolKey", _key_fields)
+
+_proxy_config_fields = ("ssl_context", "use_forwarding_for_https")
+ProxyConfig = collections.namedtuple("ProxyConfig", _proxy_config_fields)
+
+
+def _default_key_normalizer(key_class, request_context):
+    """
+    Create a pool key out of a request context dictionary.
+
+    According to RFC 3986, both the scheme and host are case-insensitive.
+    Therefore, this function normalizes both before constructing the pool
+    key for an HTTPS request. If you wish to change this behaviour, provide
+    alternate callables to ``key_fn_by_scheme``.
+
+    :param key_class:
+        The class to use when constructing the key. This should be a namedtuple
+        with the ``scheme`` and ``host`` keys at a minimum.
+    :type  key_class: namedtuple
+    :param request_context:
+        A dictionary-like object that contain the context for a request.
+    :type  request_context: dict
+
+    :return: A namedtuple that can be used as a connection pool key.
+    :rtype:  PoolKey
+    """
+    # Since we mutate the dictionary, make a copy first
+    context = request_context.copy()
+    context["scheme"] = context["scheme"].lower()
+    context["host"] = context["host"].lower()
+
+    # These are both dictionaries and need to be transformed into frozensets
+    for key in ("headers", "_proxy_headers", "_socks_options"):
+        if key in context and context[key] is not None:
+            context[key] = frozenset(context[key].items())
+
+    # The socket_options key may be a list and needs to be transformed into a
+    # tuple.
+    socket_opts = context.get("socket_options")
+    if socket_opts is not None:
+        context["socket_options"] = tuple(socket_opts)
+
+    # Map the kwargs to the names in the namedtuple - this is necessary since
+    # namedtuples can't have fields starting with '_'.
+    for key in list(context.keys()):
+        context["key_" + key] = context.pop(key)
+
+    # Default to ``None`` for keys missing from the context
+    for field in key_class._fields:
+        if field not in context:
+            context[field] = None
+
+    return key_class(**context)
+
+
+#: A dictionary that maps a scheme to a callable that creates a pool key.
+#: This can be used to alter the way pool keys are constructed, if desired.
+#: Each PoolManager makes a copy of this dictionary so they can be configured
+#: globally here, or individually on the instance.
+key_fn_by_scheme = {
+    "http": functools.partial(_default_key_normalizer, PoolKey),
+    "https": functools.partial(_default_key_normalizer, PoolKey),
+}
+
+pool_classes_by_scheme = {"http": HTTPConnectionPool, "https": HTTPSConnectionPool}
+
+
+class PoolManager(RequestMethods):
+    """
+    Allows for arbitrary requests while transparently keeping track of
+    necessary connection pools for you.
+
+    :param num_pools:
+        Number of connection pools to cache before discarding the least
+        recently used pool.
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+
+    :param \\**connection_pool_kw:
+        Additional parameters are used to create fresh
+        :class:`urllib3.connectionpool.ConnectionPool` instances.
+
+    Example::
+
+        >>> manager = PoolManager(num_pools=2)
+        >>> r = manager.request('GET', 'http://google.com/')
+        >>> r = manager.request('GET', 'http://google.com/mail')
+        >>> r = manager.request('GET', 'http://yahoo.com/')
+        >>> len(manager.pools)
+        2
+
+    """
+
+    proxy = None
+    proxy_config = None
+
+    def __init__(self, num_pools=10, headers=None, **connection_pool_kw):
+        RequestMethods.__init__(self, headers)
+        self.connection_pool_kw = connection_pool_kw
+        self.pools = RecentlyUsedContainer(num_pools, dispose_func=lambda p: p.close())
+
+        # Locally set the pool classes and keys so other PoolManagers can
+        # override them.
+        self.pool_classes_by_scheme = pool_classes_by_scheme
+        self.key_fn_by_scheme = key_fn_by_scheme.copy()
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.clear()
+        # Return False to re-raise any potential exceptions
+        return False
+
+    def _new_pool(self, scheme, host, port, request_context=None):
+        """
+        Create a new :class:`urllib3.connectionpool.ConnectionPool` based on host, port, scheme, and
+        any additional pool keyword arguments.
+
+        If ``request_context`` is provided, it is provided as keyword arguments
+        to the pool class used. This method is used to actually create the
+        connection pools handed out by :meth:`connection_from_url` and
+        companion methods. It is intended to be overridden for customization.
+        """
+        pool_cls = self.pool_classes_by_scheme[scheme]
+        if request_context is None:
+            request_context = self.connection_pool_kw.copy()
+
+        # Although the context has everything necessary to create the pool,
+        # this function has historically only used the scheme, host, and port
+        # in the positional args. When an API change is acceptable these can
+        # be removed.
+        for key in ("scheme", "host", "port"):
+            request_context.pop(key, None)
+
+        if scheme == "http":
+            for kw in SSL_KEYWORDS:
+                request_context.pop(kw, None)
+
+        return pool_cls(host, port, **request_context)
+
+    def clear(self):
+        """
+        Empty our store of pools and direct them all to close.
+
+        This will not affect in-flight connections, but they will not be
+        re-used after completion.
+        """
+        self.pools.clear()
+
+    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
+        """
+        Get a :class:`urllib3.connectionpool.ConnectionPool` based on the host, port, and scheme.
+
+        If ``port`` isn't given, it will be derived from the ``scheme`` using
+        ``urllib3.connectionpool.port_by_scheme``. If ``pool_kwargs`` is
+        provided, it is merged with the instance's ``connection_pool_kw``
+        variable and used to create the new connection pool, if one is
+        needed.
+        """
+
+        if not host:
+            raise LocationValueError("No host specified.")
+
+        request_context = self._merge_pool_kwargs(pool_kwargs)
+        request_context["scheme"] = scheme or "http"
+        if not port:
+            port = port_by_scheme.get(request_context["scheme"].lower(), 80)
+        request_context["port"] = port
+        request_context["host"] = host
+
+        return self.connection_from_context(request_context)
+
+    def connection_from_context(self, request_context):
+        """
+        Get a :class:`urllib3.connectionpool.ConnectionPool` based on the request context.
+
+        ``request_context`` must at least contain the ``scheme`` key and its
+        value must be a key in ``key_fn_by_scheme`` instance variable.
+        """
+        scheme = request_context["scheme"].lower()
+        pool_key_constructor = self.key_fn_by_scheme.get(scheme)
+        if not pool_key_constructor:
+            raise URLSchemeUnknown(scheme)
+        pool_key = pool_key_constructor(request_context)
+
+        return self.connection_from_pool_key(pool_key, request_context=request_context)
+
+    def connection_from_pool_key(self, pool_key, request_context=None):
+        """
+        Get a :class:`urllib3.connectionpool.ConnectionPool` based on the provided pool key.
+
+        ``pool_key`` should be a namedtuple that only contains immutable
+        objects. At a minimum it must have the ``scheme``, ``host``, and
+        ``port`` fields.
+        """
+        with self.pools.lock:
+            # If the scheme, host, or port doesn't match existing open
+            # connections, open a new ConnectionPool.
+            pool = self.pools.get(pool_key)
+            if pool:
+                return pool
+
+            # Make a fresh ConnectionPool of the desired type
+            scheme = request_context["scheme"]
+            host = request_context["host"]
+            port = request_context["port"]
+            pool = self._new_pool(scheme, host, port, request_context=request_context)
+            self.pools[pool_key] = pool
+
+        return pool
+
+    def connection_from_url(self, url, pool_kwargs=None):
+        """
+        Similar to :func:`urllib3.connectionpool.connection_from_url`.
+
+        If ``pool_kwargs`` is not provided and a new pool needs to be
+        constructed, ``self.connection_pool_kw`` is used to initialize
+        the :class:`urllib3.connectionpool.ConnectionPool`. If ``pool_kwargs``
+        is provided, it is used instead. Note that if a new pool does not
+        need to be created for the request, the provided ``pool_kwargs`` are
+        not used.
+        """
+        u = parse_url(url)
+        return self.connection_from_host(
+            u.host, port=u.port, scheme=u.scheme, pool_kwargs=pool_kwargs
+        )
+
+    def _merge_pool_kwargs(self, override):
+        """
+        Merge a dictionary of override values for self.connection_pool_kw.
+
+        This does not modify self.connection_pool_kw and returns a new dict.
+        Any keys in the override dictionary with a value of ``None`` are
+        removed from the merged dictionary.
+        """
+        base_pool_kwargs = self.connection_pool_kw.copy()
+        if override:
+            for key, value in override.items():
+                if value is None:
+                    try:
+                        del base_pool_kwargs[key]
+                    except KeyError:
+                        pass
+                else:
+                    base_pool_kwargs[key] = value
+        return base_pool_kwargs
+
+    def _proxy_requires_url_absolute_form(self, parsed_url):
+        """
+        Indicates if the proxy requires the complete destination URL in the
+        request.  Normally this is only needed when not using an HTTP CONNECT
+        tunnel.
+        """
+        if self.proxy is None:
+            return False
+
+        return not connection_requires_http_tunnel(
+            self.proxy, self.proxy_config, parsed_url.scheme
+        )
+
+    def _validate_proxy_scheme_url_selection(self, url_scheme):
+        """
+        Validates that were not attempting to do TLS in TLS connections on
+        Python2 or with unsupported SSL implementations.
+        """
+        if self.proxy is None or url_scheme != "https":
+            return
+
+        if self.proxy.scheme != "https":
+            return
+
+        if six.PY2 and not self.proxy_config.use_forwarding_for_https:
+            raise ProxySchemeUnsupported(
+                "Contacting HTTPS destinations through HTTPS proxies "
+                "'via CONNECT tunnels' is not supported in Python 2"
+            )
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        """
+        Same as :meth:`urllib3.HTTPConnectionPool.urlopen`
+        with custom cross-host redirect logic and only sends the request-uri
+        portion of the ``url``.
+
+        The given ``url`` parameter must be absolute, such that an appropriate
+        :class:`urllib3.connectionpool.ConnectionPool` can be chosen for it.
+        """
+        u = parse_url(url)
+        self._validate_proxy_scheme_url_selection(u.scheme)
+
+        conn = self.connection_from_host(u.host, port=u.port, scheme=u.scheme)
+
+        kw["assert_same_host"] = False
+        kw["redirect"] = False
+
+        if "headers" not in kw:
+            kw["headers"] = self.headers.copy()
+
+        if self._proxy_requires_url_absolute_form(u):
+            response = conn.urlopen(method, url, **kw)
+        else:
+            response = conn.urlopen(method, u.request_uri, **kw)
+
+        redirect_location = redirect and response.get_redirect_location()
+        if not redirect_location:
+            return response
+
+        # Support relative URLs for redirecting.
+        redirect_location = urljoin(url, redirect_location)
+
+        # RFC 7231, Section 6.4.4
+        if response.status == 303:
+            method = "GET"
+
+        retries = kw.get("retries")
+        if not isinstance(retries, Retry):
+            retries = Retry.from_int(retries, redirect=redirect)
+
+        # Strip headers marked as unsafe to forward to the redirected location.
+        # Check remove_headers_on_redirect to avoid a potential network call within
+        # conn.is_same_host() which may use socket.gethostbyname() in the future.
+        if retries.remove_headers_on_redirect and not conn.is_same_host(
+            redirect_location
+        ):
+            headers = list(six.iterkeys(kw["headers"]))
+            for header in headers:
+                if header.lower() in retries.remove_headers_on_redirect:
+                    kw["headers"].pop(header, None)
+
+        try:
+            retries = retries.increment(method, url, response=response, _pool=conn)
+        except MaxRetryError:
+            if retries.raise_on_redirect:
+                response.drain_conn()
+                raise
+            return response
+
+        kw["retries"] = retries
+        kw["redirect"] = redirect
+
+        log.info("Redirecting %s -> %s", url, redirect_location)
+
+        response.drain_conn()
+        return self.urlopen(method, redirect_location, **kw)
+
+
+class ProxyManager(PoolManager):
+    """
+    Behaves just like :class:`PoolManager`, but sends all requests through
+    the defined proxy, using the CONNECT method for HTTPS URLs.
+
+    :param proxy_url:
+        The URL of the proxy to be used.
+
+    :param proxy_headers:
+        A dictionary containing headers that will be sent to the proxy. In case
+        of HTTP they are being sent with each request, while in the
+        HTTPS/CONNECT case they are sent only once. Could be used for proxy
+        authentication.
+
+    :param proxy_ssl_context:
+        The proxy SSL context is used to establish the TLS connection to the
+        proxy when using HTTPS proxies.
+
+    :param use_forwarding_for_https:
+        (Defaults to False) If set to True will forward requests to the HTTPS
+        proxy to be made on behalf of the client instead of creating a TLS
+        tunnel via the CONNECT method. **Enabling this flag means that request
+        and response headers and content will be visible from the HTTPS proxy**
+        whereas tunneling keeps request and response headers and content
+        private.  IP address, target hostname, SNI, and port are always visible
+        to an HTTPS proxy even when this flag is disabled.
+
+    Example:
+        >>> proxy = urllib3.ProxyManager('http://localhost:3128/')
+        >>> r1 = proxy.request('GET', 'http://google.com/')
+        >>> r2 = proxy.request('GET', 'http://httpbin.org/')
+        >>> len(proxy.pools)
+        1
+        >>> r3 = proxy.request('GET', 'https://httpbin.org/')
+        >>> r4 = proxy.request('GET', 'https://twitter.com/')
+        >>> len(proxy.pools)
+        3
+
+    """
+
+    def __init__(
+        self,
+        proxy_url,
+        num_pools=10,
+        headers=None,
+        proxy_headers=None,
+        proxy_ssl_context=None,
+        use_forwarding_for_https=False,
+        **connection_pool_kw
+    ):
+
+        if isinstance(proxy_url, HTTPConnectionPool):
+            proxy_url = "%s://%s:%i" % (
+                proxy_url.scheme,
+                proxy_url.host,
+                proxy_url.port,
+            )
+        proxy = parse_url(proxy_url)
+
+        if proxy.scheme not in ("http", "https"):
+            raise ProxySchemeUnknown(proxy.scheme)
+
+        if not proxy.port:
+            port = port_by_scheme.get(proxy.scheme, 80)
+            proxy = proxy._replace(port=port)
+
+        self.proxy = proxy
+        self.proxy_headers = proxy_headers or {}
+        self.proxy_ssl_context = proxy_ssl_context
+        self.proxy_config = ProxyConfig(proxy_ssl_context, use_forwarding_for_https)
+
+        connection_pool_kw["_proxy"] = self.proxy
+        connection_pool_kw["_proxy_headers"] = self.proxy_headers
+        connection_pool_kw["_proxy_config"] = self.proxy_config
+
+        super(ProxyManager, self).__init__(num_pools, headers, **connection_pool_kw)
+
+    def connection_from_host(self, host, port=None, scheme="http", pool_kwargs=None):
+        if scheme == "https":
+            return super(ProxyManager, self).connection_from_host(
+                host, port, scheme, pool_kwargs=pool_kwargs
+            )
+
+        return super(ProxyManager, self).connection_from_host(
+            self.proxy.host, self.proxy.port, self.proxy.scheme, pool_kwargs=pool_kwargs
+        )
+
+    def _set_proxy_headers(self, url, headers=None):
+        """
+        Sets headers needed by proxies: specifically, the Accept and Host
+        headers. Only sets headers not provided by the user.
+        """
+        headers_ = {"Accept": "*/*"}
+
+        netloc = parse_url(url).netloc
+        if netloc:
+            headers_["Host"] = netloc
+
+        if headers:
+            headers_.update(headers)
+        return headers_
+
+    def urlopen(self, method, url, redirect=True, **kw):
+        "Same as HTTP(S)ConnectionPool.urlopen, ``url`` must be absolute."
+        u = parse_url(url)
+        if not connection_requires_http_tunnel(self.proxy, self.proxy_config, u.scheme):
+            # For connections using HTTP CONNECT, httplib sets the necessary
+            # headers on the CONNECT to the proxy. If we're not using CONNECT,
+            # we'll definitely need to set 'Host' at the very least.
+            headers = kw.get("headers", self.headers)
+            kw["headers"] = self._set_proxy_headers(url, headers)
+
+        return super(ProxyManager, self).urlopen(method, url, redirect=redirect, **kw)
+
+
+def proxy_from_url(url, **kw):
+    return ProxyManager(proxy_url=url, **kw)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/request.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/request.py
new file mode 100644
index 0000000..398386a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/request.py
@@ -0,0 +1,170 @@
+from __future__ import absolute_import
+
+from .filepost import encode_multipart_formdata
+from .packages.six.moves.urllib.parse import urlencode
+
+__all__ = ["RequestMethods"]
+
+
+class RequestMethods(object):
+    """
+    Convenience mixin for classes who implement a :meth:`urlopen` method, such
+    as :class:`urllib3.HTTPConnectionPool` and
+    :class:`urllib3.PoolManager`.
+
+    Provides behavior for making common types of HTTP request methods and
+    decides which type of request field encoding to use.
+
+    Specifically,
+
+    :meth:`.request_encode_url` is for sending requests whose fields are
+    encoded in the URL (such as GET, HEAD, DELETE).
+
+    :meth:`.request_encode_body` is for sending requests whose fields are
+    encoded in the *body* of the request using multipart or www-form-urlencoded
+    (such as for POST, PUT, PATCH).
+
+    :meth:`.request` is for making any kind of request, it will look up the
+    appropriate encoding format and use one of the above two methods to make
+    the request.
+
+    Initializer parameters:
+
+    :param headers:
+        Headers to include with all requests, unless other headers are given
+        explicitly.
+    """
+
+    _encode_url_methods = {"DELETE", "GET", "HEAD", "OPTIONS"}
+
+    def __init__(self, headers=None):
+        self.headers = headers or {}
+
+    def urlopen(
+        self,
+        method,
+        url,
+        body=None,
+        headers=None,
+        encode_multipart=True,
+        multipart_boundary=None,
+        **kw
+    ):  # Abstract
+        raise NotImplementedError(
+            "Classes extending RequestMethods must implement "
+            "their own ``urlopen`` method."
+        )
+
+    def request(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the appropriate encoding of
+        ``fields`` based on the ``method`` used.
+
+        This is a convenience method that requires the least amount of manual
+        effort. It can be used in most situations, while still having the
+        option to drop down to more specific methods when necessary, such as
+        :meth:`request_encode_url`, :meth:`request_encode_body`,
+        or even the lowest level :meth:`urlopen`.
+        """
+        method = method.upper()
+
+        urlopen_kw["request_url"] = url
+
+        if method in self._encode_url_methods:
+            return self.request_encode_url(
+                method, url, fields=fields, headers=headers, **urlopen_kw
+            )
+        else:
+            return self.request_encode_body(
+                method, url, fields=fields, headers=headers, **urlopen_kw
+            )
+
+    def request_encode_url(self, method, url, fields=None, headers=None, **urlopen_kw):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the url. This is useful for request methods like GET, HEAD, DELETE, etc.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {"headers": headers}
+        extra_kw.update(urlopen_kw)
+
+        if fields:
+            url += "?" + urlencode(fields)
+
+        return self.urlopen(method, url, **extra_kw)
+
+    def request_encode_body(
+        self,
+        method,
+        url,
+        fields=None,
+        headers=None,
+        encode_multipart=True,
+        multipart_boundary=None,
+        **urlopen_kw
+    ):
+        """
+        Make a request using :meth:`urlopen` with the ``fields`` encoded in
+        the body. This is useful for request methods like POST, PUT, PATCH, etc.
+
+        When ``encode_multipart=True`` (default), then
+        :func:`urllib3.encode_multipart_formdata` is used to encode
+        the payload with the appropriate content type. Otherwise
+        :func:`urllib.parse.urlencode` is used with the
+        'application/x-www-form-urlencoded' content type.
+
+        Multipart encoding must be used when posting files, and it's reasonably
+        safe to use it in other times too. However, it may break request
+        signing, such as with OAuth.
+
+        Supports an optional ``fields`` parameter of key/value strings AND
+        key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
+        the MIME type is optional. For example::
+
+            fields = {
+                'foo': 'bar',
+                'fakefile': ('foofile.txt', 'contents of foofile'),
+                'realfile': ('barfile.txt', open('realfile').read()),
+                'typedfile': ('bazfile.bin', open('bazfile').read(),
+                              'image/jpeg'),
+                'nonamefile': 'contents of nonamefile field',
+            }
+
+        When uploading a file, providing a filename (the first parameter of the
+        tuple) is optional but recommended to best mimic behavior of browsers.
+
+        Note that if ``headers`` are supplied, the 'Content-Type' header will
+        be overwritten because it depends on the dynamic random boundary string
+        which is used to compose the body of the request. The random boundary
+        string can be explicitly set with the ``multipart_boundary`` parameter.
+        """
+        if headers is None:
+            headers = self.headers
+
+        extra_kw = {"headers": {}}
+
+        if fields:
+            if "body" in urlopen_kw:
+                raise TypeError(
+                    "request got values for both 'fields' and 'body', can only specify one."
+                )
+
+            if encode_multipart:
+                body, content_type = encode_multipart_formdata(
+                    fields, boundary=multipart_boundary
+                )
+            else:
+                body, content_type = (
+                    urlencode(fields),
+                    "application/x-www-form-urlencoded",
+                )
+
+            extra_kw["body"] = body
+            extra_kw["headers"] = {"Content-Type": content_type}
+
+        extra_kw["headers"].update(headers)
+        extra_kw.update(urlopen_kw)
+
+        return self.urlopen(method, url, **extra_kw)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/response.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/response.py
new file mode 100644
index 0000000..4969b70
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/response.py
@@ -0,0 +1,866 @@
+from __future__ import absolute_import
+
+import io
+import logging
+import sys
+import zlib
+from contextlib import contextmanager
+from socket import error as SocketError
+from socket import timeout as SocketTimeout
+
+brotli = None
+
+from . import util
+from ._collections import HTTPHeaderDict
+from .connection import BaseSSLError, HTTPException
+from .exceptions import (
+    BodyNotHttplibCompatible,
+    DecodeError,
+    HTTPError,
+    IncompleteRead,
+    InvalidChunkLength,
+    InvalidHeader,
+    ProtocolError,
+    ReadTimeoutError,
+    ResponseNotChunked,
+    SSLError,
+)
+from .packages import six
+from .util.response import is_fp_closed, is_response_to_head
+
+log = logging.getLogger(__name__)
+
+
+class DeflateDecoder(object):
+    def __init__(self):
+        self._first_try = True
+        self._data = b""
+        self._obj = zlib.decompressobj()
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        if not data:
+            return data
+
+        if not self._first_try:
+            return self._obj.decompress(data)
+
+        self._data += data
+        try:
+            decompressed = self._obj.decompress(data)
+            if decompressed:
+                self._first_try = False
+                self._data = None
+            return decompressed
+        except zlib.error:
+            self._first_try = False
+            self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
+            try:
+                return self.decompress(self._data)
+            finally:
+                self._data = None
+
+
+class GzipDecoderState(object):
+
+    FIRST_MEMBER = 0
+    OTHER_MEMBERS = 1
+    SWALLOW_DATA = 2
+
+
+class GzipDecoder(object):
+    def __init__(self):
+        self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+        self._state = GzipDecoderState.FIRST_MEMBER
+
+    def __getattr__(self, name):
+        return getattr(self._obj, name)
+
+    def decompress(self, data):
+        ret = bytearray()
+        if self._state == GzipDecoderState.SWALLOW_DATA or not data:
+            return bytes(ret)
+        while True:
+            try:
+                ret += self._obj.decompress(data)
+            except zlib.error:
+                previous_state = self._state
+                # Ignore data after the first error
+                self._state = GzipDecoderState.SWALLOW_DATA
+                if previous_state == GzipDecoderState.OTHER_MEMBERS:
+                    # Allow trailing garbage acceptable in other gzip clients
+                    return bytes(ret)
+                raise
+            data = self._obj.unused_data
+            if not data:
+                return bytes(ret)
+            self._state = GzipDecoderState.OTHER_MEMBERS
+            self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
+
+
+if brotli is not None:
+
+    class BrotliDecoder(object):
+        # Supports both 'brotlipy' and 'Brotli' packages
+        # since they share an import name. The top branches
+        # are for 'brotlipy' and bottom branches for 'Brotli'
+        def __init__(self):
+            self._obj = brotli.Decompressor()
+            if hasattr(self._obj, "decompress"):
+                self.decompress = self._obj.decompress
+            else:
+                self.decompress = self._obj.process
+
+        def flush(self):
+            if hasattr(self._obj, "flush"):
+                return self._obj.flush()
+            return b""
+
+
+class MultiDecoder(object):
+    """
+    From RFC7231:
+        If one or more encodings have been applied to a representation, the
+        sender that applied the encodings MUST generate a Content-Encoding
+        header field that lists the content codings in the order in which
+        they were applied.
+    """
+
+    def __init__(self, modes):
+        self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")]
+
+    def flush(self):
+        return self._decoders[0].flush()
+
+    def decompress(self, data):
+        for d in reversed(self._decoders):
+            data = d.decompress(data)
+        return data
+
+
+def _get_decoder(mode):
+    if "," in mode:
+        return MultiDecoder(mode)
+
+    if mode == "gzip":
+        return GzipDecoder()
+
+    if brotli is not None and mode == "br":
+        return BrotliDecoder()
+
+    return DeflateDecoder()
+
+
+class HTTPResponse(io.IOBase):
+    """
+    HTTP Response container.
+
+    Backwards-compatible with :class:`http.client.HTTPResponse` but the response ``body`` is
+    loaded and decoded on-demand when the ``data`` property is accessed.  This
+    class is also compatible with the Python standard library's :mod:`io`
+    module, and can hence be treated as a readable object in the context of that
+    framework.
+
+    Extra parameters for behaviour not present in :class:`http.client.HTTPResponse`:
+
+    :param preload_content:
+        If True, the response's body will be preloaded during construction.
+
+    :param decode_content:
+        If True, will attempt to decode the body based on the
+        'content-encoding' header.
+
+    :param original_response:
+        When this HTTPResponse wrapper is generated from an :class:`http.client.HTTPResponse`
+        object, it's convenient to include the original for debug purposes. It's
+        otherwise unused.
+
+    :param retries:
+        The retries contains the last :class:`~urllib3.util.retry.Retry` that
+        was used during the request.
+
+    :param enforce_content_length:
+        Enforce content length checking. Body returned by server must match
+        value of Content-Length header, if present. Otherwise, raise error.
+    """
+
+    CONTENT_DECODERS = ["gzip", "deflate"]
+    if brotli is not None:
+        CONTENT_DECODERS += ["br"]
+    REDIRECT_STATUSES = [301, 302, 303, 307, 308]
+
+    def __init__(
+        self,
+        body="",
+        headers=None,
+        status=0,
+        version=0,
+        reason=None,
+        strict=0,
+        preload_content=True,
+        decode_content=True,
+        original_response=None,
+        pool=None,
+        connection=None,
+        msg=None,
+        retries=None,
+        enforce_content_length=False,
+        request_method=None,
+        request_url=None,
+        auto_close=True,
+    ):
+
+        if isinstance(headers, HTTPHeaderDict):
+            self.headers = headers
+        else:
+            self.headers = HTTPHeaderDict(headers)
+        self.status = status
+        self.version = version
+        self.reason = reason
+        self.strict = strict
+        self.decode_content = decode_content
+        self.retries = retries
+        self.enforce_content_length = enforce_content_length
+        self.auto_close = auto_close
+
+        self._decoder = None
+        self._body = None
+        self._fp = None
+        self._original_response = original_response
+        self._fp_bytes_read = 0
+        self.msg = msg
+        self._request_url = request_url
+
+        if body and isinstance(body, (six.string_types, bytes)):
+            self._body = body
+
+        self._pool = pool
+        self._connection = connection
+
+        if hasattr(body, "read"):
+            self._fp = body
+
+        # Are we using the chunked-style of transfer encoding?
+        self.chunked = False
+        self.chunk_left = None
+        tr_enc = self.headers.get("transfer-encoding", "").lower()
+        # Don't incur the penalty of creating a list and then discarding it
+        encodings = (enc.strip() for enc in tr_enc.split(","))
+        if "chunked" in encodings:
+            self.chunked = True
+
+        # Determine length of response
+        self.length_remaining = self._init_length(request_method)
+
+        # If requested, preload the body.
+        if preload_content and not self._body:
+            self._body = self.read(decode_content=decode_content)
+
+    def get_redirect_location(self):
+        """
+        Should we redirect and where to?
+
+        :returns: Truthy redirect location string if we got a redirect status
+            code and valid location. ``None`` if redirect status and no
+            location. ``False`` if not a redirect status code.
+        """
+        if self.status in self.REDIRECT_STATUSES:
+            return self.headers.get("location")
+
+        return False
+
+    def release_conn(self):
+        if not self._pool or not self._connection:
+            return
+
+        self._pool._put_conn(self._connection)
+        self._connection = None
+
+    def drain_conn(self):
+        """
+        Read and discard any remaining HTTP response data in the response connection.
+
+        Unread data in the HTTPResponse connection blocks the connection from being released back to the pool.
+        """
+        try:
+            self.read()
+        except (HTTPError, SocketError, BaseSSLError, HTTPException):
+            pass
+
+    @property
+    def data(self):
+        # For backwards-compat with earlier urllib3 0.4 and earlier.
+        if self._body:
+            return self._body
+
+        if self._fp:
+            return self.read(cache_content=True)
+
+    @property
+    def connection(self):
+        return self._connection
+
+    def isclosed(self):
+        return is_fp_closed(self._fp)
+
+    def tell(self):
+        """
+        Obtain the number of bytes pulled over the wire so far. May differ from
+        the amount of content returned by :meth:``urllib3.response.HTTPResponse.read``
+        if bytes are encoded on the wire (e.g, compressed).
+        """
+        return self._fp_bytes_read
+
+    def _init_length(self, request_method):
+        """
+        Set initial length value for Response content if available.
+        """
+        length = self.headers.get("content-length")
+
+        if length is not None:
+            if self.chunked:
+                # This Response will fail with an IncompleteRead if it can't be
+                # received as chunked. This method falls back to attempt reading
+                # the response before raising an exception.
+                log.warning(
+                    "Received response with both Content-Length and "
+                    "Transfer-Encoding set. This is expressly forbidden "
+                    "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
+                    "attempting to process response as Transfer-Encoding: "
+                    "chunked."
+                )
+                return None
+
+            try:
+                # RFC 7230 section 3.3.2 specifies multiple content lengths can
+                # be sent in a single Content-Length header
+                # (e.g. Content-Length: 42, 42). This line ensures the values
+                # are all valid ints and that as long as the `set` length is 1,
+                # all values are the same. Otherwise, the header is invalid.
+                lengths = set([int(val) for val in length.split(",")])
+                if len(lengths) > 1:
+                    raise InvalidHeader(
+                        "Content-Length contained multiple "
+                        "unmatching values (%s)" % length
+                    )
+                length = lengths.pop()
+            except ValueError:
+                length = None
+            else:
+                if length < 0:
+                    length = None
+
+        # Convert status to int for comparison
+        # In some cases, httplib returns a status of "_UNKNOWN"
+        try:
+            status = int(self.status)
+        except ValueError:
+            status = 0
+
+        # Check for responses that shouldn't include a body
+        if status in (204, 304) or 100 <= status < 200 or request_method == "HEAD":
+            length = 0
+
+        return length
+
+    def _init_decoder(self):
+        """
+        Set-up the _decoder attribute if necessary.
+        """
+        # Note: content-encoding value should be case-insensitive, per RFC 7230
+        # Section 3.2
+        content_encoding = self.headers.get("content-encoding", "").lower()
+        if self._decoder is None:
+            if content_encoding in self.CONTENT_DECODERS:
+                self._decoder = _get_decoder(content_encoding)
+            elif "," in content_encoding:
+                encodings = [
+                    e.strip()
+                    for e in content_encoding.split(",")
+                    if e.strip() in self.CONTENT_DECODERS
+                ]
+                if len(encodings):
+                    self._decoder = _get_decoder(content_encoding)
+
+    DECODER_ERROR_CLASSES = (IOError, zlib.error)
+    if brotli is not None:
+        DECODER_ERROR_CLASSES += (brotli.error,)
+
+    def _decode(self, data, decode_content, flush_decoder):
+        """
+        Decode the data passed in and potentially flush the decoder.
+        """
+        if not decode_content:
+            return data
+
+        try:
+            if self._decoder:
+                data = self._decoder.decompress(data)
+        except self.DECODER_ERROR_CLASSES as e:
+            content_encoding = self.headers.get("content-encoding", "").lower()
+            raise DecodeError(
+                "Received response with content-encoding: %s, but "
+                "failed to decode it." % content_encoding,
+                e,
+            )
+        if flush_decoder:
+            data += self._flush_decoder()
+
+        return data
+
+    def _flush_decoder(self):
+        """
+        Flushes the decoder. Should only be called if the decoder is actually
+        being used.
+        """
+        if self._decoder:
+            buf = self._decoder.decompress(b"")
+            return buf + self._decoder.flush()
+
+        return b""
+
+    @contextmanager
+    def _error_catcher(self):
+        """
+        Catch low-level python exceptions, instead re-raising urllib3
+        variants, so that low-level exceptions are not leaked in the
+        high-level api.
+
+        On exit, release the connection back to the pool.
+        """
+        clean_exit = False
+
+        try:
+            try:
+                yield
+
+            except SocketTimeout:
+                # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
+                # there is yet no clean way to get at it from this context.
+                raise ReadTimeoutError(self._pool, None, "Read timed out.")
+
+            except BaseSSLError as e:
+                # FIXME: Is there a better way to differentiate between SSLErrors?
+                if "read operation timed out" not in str(e):
+                    # SSL errors related to framing/MAC get wrapped and reraised here
+                    raise SSLError(e)
+
+                raise ReadTimeoutError(self._pool, None, "Read timed out.")
+
+            except (HTTPException, SocketError) as e:
+                # This includes IncompleteRead.
+                raise ProtocolError("Connection broken: %r" % e, e)
+
+            # If no exception is thrown, we should avoid cleaning up
+            # unnecessarily.
+            clean_exit = True
+        finally:
+            # If we didn't terminate cleanly, we need to throw away our
+            # connection.
+            if not clean_exit:
+                # The response may not be closed but we're not going to use it
+                # anymore so close it now to ensure that the connection is
+                # released back to the pool.
+                if self._original_response:
+                    self._original_response.close()
+
+                # Closing the response may not actually be sufficient to close
+                # everything, so if we have a hold of the connection close that
+                # too.
+                if self._connection:
+                    self._connection.close()
+
+            # If we hold the original response but it's closed now, we should
+            # return the connection back to the pool.
+            if self._original_response and self._original_response.isclosed():
+                self.release_conn()
+
+    def _fp_read(self, amt):
+        """
+        Read a response with the thought that reading the number of bytes
+        larger than can fit in a 32-bit int at a time via SSL in some
+        known cases leads to an overflow error that has to be prevented
+        if `amt` or `self.length_remaining` indicate that a problem may
+        happen.
+
+        The known cases:
+          * 3.8 <= CPython < 3.9.7 because of a bug
+            https://github.com/urllib3/urllib3/issues/2513#issuecomment-1152559900.
+          * urllib3 injected with pyOpenSSL-backed SSL-support.
+          * CPython < 3.10 only when `amt` does not fit 32-bit int.
+        """
+        assert self._fp
+        c_int_max = 2 ** 31 - 1
+        if (
+            (
+                (amt and amt > c_int_max)
+                or (self.length_remaining and self.length_remaining > c_int_max)
+            )
+            and not util.IS_SECURETRANSPORT
+            and (util.IS_PYOPENSSL or sys.version_info < (3, 10))
+        ):
+            buffer = io.BytesIO()
+            # Besides `max_chunk_amt` being a maximum chunk size, it
+            # affects memory overhead of reading a response by this
+            # method in CPython.
+            # `c_int_max` equal to 2 GiB - 1 byte is the actual maximum
+            # chunk size that does not lead to an overflow error, but
+            # 256 MiB is a compromise.
+            max_chunk_amt = 2 ** 28
+            while amt is None or amt != 0:
+                if amt is not None:
+                    chunk_amt = min(amt, max_chunk_amt)
+                    amt -= chunk_amt
+                else:
+                    chunk_amt = max_chunk_amt
+                data = self._fp.read(chunk_amt)
+                if not data:
+                    break
+                buffer.write(data)
+                del data  # to reduce peak memory usage by `max_chunk_amt`.
+            return buffer.getvalue()
+        else:
+            # StringIO doesn't like amt=None
+            return self._fp.read(amt) if amt is not None else self._fp.read()
+
+    def read(self, amt=None, decode_content=None, cache_content=False):
+        """
+        Similar to :meth:`http.client.HTTPResponse.read`, but with two additional
+        parameters: ``decode_content`` and ``cache_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+
+        :param cache_content:
+            If True, will save the returned data such that the same result is
+            returned despite of the state of the underlying file object. This
+            is useful if you want the ``.data`` property to continue working
+            after having ``.read()`` the file object. (Overridden if ``amt`` is
+            set.)
+        """
+        self._init_decoder()
+        if decode_content is None:
+            decode_content = self.decode_content
+
+        if self._fp is None:
+            return
+
+        flush_decoder = False
+        fp_closed = getattr(self._fp, "closed", False)
+
+        with self._error_catcher():
+            data = self._fp_read(amt) if not fp_closed else b""
+            if amt is None:
+                flush_decoder = True
+            else:
+                cache_content = False
+                if (
+                    amt != 0 and not data
+                ):  # Platform-specific: Buggy versions of Python.
+                    # Close the connection when no data is returned
+                    #
+                    # This is redundant to what httplib/http.client _should_
+                    # already do.  However, versions of python released before
+                    # December 15, 2012 (http://bugs.python.org/issue16298) do
+                    # not properly close the connection in all cases. There is
+                    # no harm in redundantly calling close.
+                    self._fp.close()
+                    flush_decoder = True
+                    if self.enforce_content_length and self.length_remaining not in (
+                        0,
+                        None,
+                    ):
+                        # This is an edge case that httplib failed to cover due
+                        # to concerns of backward compatibility. We're
+                        # addressing it here to make sure IncompleteRead is
+                        # raised during streaming, so all calls with incorrect
+                        # Content-Length are caught.
+                        raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
+
+        if data:
+            self._fp_bytes_read += len(data)
+            if self.length_remaining is not None:
+                self.length_remaining -= len(data)
+
+            data = self._decode(data, decode_content, flush_decoder)
+
+            if cache_content:
+                self._body = data
+
+        return data
+
+    def stream(self, amt=2 ** 16, decode_content=None):
+        """
+        A generator wrapper for the read() method. A call will block until
+        ``amt`` bytes have been read from the connection or until the
+        connection is closed.
+
+        :param amt:
+            How much of the content to read. The generator will return up to
+            much data per iteration, but may return less. This is particularly
+            likely when using compressed data. However, the empty string will
+            never be returned.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        if self.chunked and self.supports_chunked_reads():
+            for line in self.read_chunked(amt, decode_content=decode_content):
+                yield line
+        else:
+            while not is_fp_closed(self._fp):
+                data = self.read(amt=amt, decode_content=decode_content)
+
+                if data:
+                    yield data
+
+    @classmethod
+    def from_httplib(ResponseCls, r, **response_kw):
+        """
+        Given an :class:`http.client.HTTPResponse` instance ``r``, return a
+        corresponding :class:`urllib3.response.HTTPResponse` object.
+
+        Remaining parameters are passed to the HTTPResponse constructor, along
+        with ``original_response=r``.
+        """
+        headers = r.msg
+
+        if not isinstance(headers, HTTPHeaderDict):
+            if six.PY2:
+                # Python 2.7
+                headers = HTTPHeaderDict.from_httplib(headers)
+            else:
+                headers = HTTPHeaderDict(headers.items())
+
+        # HTTPResponse objects in Python 3 don't have a .strict attribute
+        strict = getattr(r, "strict", 0)
+        resp = ResponseCls(
+            body=r,
+            headers=headers,
+            status=r.status,
+            version=r.version,
+            reason=r.reason,
+            strict=strict,
+            original_response=r,
+            **response_kw
+        )
+        return resp
+
+    # Backwards-compatibility methods for http.client.HTTPResponse
+    def getheaders(self):
+        return self.headers
+
+    def getheader(self, name, default=None):
+        return self.headers.get(name, default)
+
+    # Backwards compatibility for http.cookiejar
+    def info(self):
+        return self.headers
+
+    # Overrides from io.IOBase
+    def close(self):
+        if not self.closed:
+            self._fp.close()
+
+        if self._connection:
+            self._connection.close()
+
+        if not self.auto_close:
+            io.IOBase.close(self)
+
+    @property
+    def closed(self):
+        if not self.auto_close:
+            return io.IOBase.closed.__get__(self)
+        elif self._fp is None:
+            return True
+        elif hasattr(self._fp, "isclosed"):
+            return self._fp.isclosed()
+        elif hasattr(self._fp, "closed"):
+            return self._fp.closed
+        else:
+            return True
+
+    def fileno(self):
+        if self._fp is None:
+            raise IOError("HTTPResponse has no file to get a fileno from")
+        elif hasattr(self._fp, "fileno"):
+            return self._fp.fileno()
+        else:
+            raise IOError(
+                "The file-like object this HTTPResponse is wrapped "
+                "around has no file descriptor"
+            )
+
+    def flush(self):
+        if (
+            self._fp is not None
+            and hasattr(self._fp, "flush")
+            and not getattr(self._fp, "closed", False)
+        ):
+            return self._fp.flush()
+
+    def readable(self):
+        # This method is required for `io` module compatibility.
+        return True
+
+    def readinto(self, b):
+        # This method is required for `io` module compatibility.
+        temp = self.read(len(b))
+        if len(temp) == 0:
+            return 0
+        else:
+            b[: len(temp)] = temp
+            return len(temp)
+
+    def supports_chunked_reads(self):
+        """
+        Checks if the underlying file-like object looks like a
+        :class:`http.client.HTTPResponse` object. We do this by testing for
+        the fp attribute. If it is present we assume it returns raw chunks as
+        processed by read_chunked().
+        """
+        return hasattr(self._fp, "fp")
+
+    def _update_chunk_length(self):
+        # First, we'll figure out length of a chunk and then
+        # we'll try to read it from socket.
+        if self.chunk_left is not None:
+            return
+        line = self._fp.fp.readline()
+        line = line.split(b";", 1)[0]
+        try:
+            self.chunk_left = int(line, 16)
+        except ValueError:
+            # Invalid chunked protocol response, abort.
+            self.close()
+            raise InvalidChunkLength(self, line)
+
+    def _handle_chunk(self, amt):
+        returned_chunk = None
+        if amt is None:
+            chunk = self._fp._safe_read(self.chunk_left)
+            returned_chunk = chunk
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        elif amt < self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self.chunk_left = self.chunk_left - amt
+            returned_chunk = value
+        elif amt == self.chunk_left:
+            value = self._fp._safe_read(amt)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+            returned_chunk = value
+        else:  # amt > self.chunk_left
+            returned_chunk = self._fp._safe_read(self.chunk_left)
+            self._fp._safe_read(2)  # Toss the CRLF at the end of the chunk.
+            self.chunk_left = None
+        return returned_chunk
+
+    def read_chunked(self, amt=None, decode_content=None):
+        """
+        Similar to :meth:`HTTPResponse.read`, but with an additional
+        parameter: ``decode_content``.
+
+        :param amt:
+            How much of the content to read. If specified, caching is skipped
+            because it doesn't make sense to cache partial content as the full
+            response.
+
+        :param decode_content:
+            If True, will attempt to decode the body based on the
+            'content-encoding' header.
+        """
+        self._init_decoder()
+        # FIXME: Rewrite this method and make it a class with a better structured logic.
+        if not self.chunked:
+            raise ResponseNotChunked(
+                "Response is not chunked. "
+                "Header 'transfer-encoding: chunked' is missing."
+            )
+        if not self.supports_chunked_reads():
+            raise BodyNotHttplibCompatible(
+                "Body should be http.client.HTTPResponse like. "
+                "It should have have an fp attribute which returns raw chunks."
+            )
+
+        with self._error_catcher():
+            # Don't bother reading the body of a HEAD request.
+            if self._original_response and is_response_to_head(self._original_response):
+                self._original_response.close()
+                return
+
+            # If a response is already read and closed
+            # then return immediately.
+            if self._fp.fp is None:
+                return
+
+            while True:
+                self._update_chunk_length()
+                if self.chunk_left == 0:
+                    break
+                chunk = self._handle_chunk(amt)
+                decoded = self._decode(
+                    chunk, decode_content=decode_content, flush_decoder=False
+                )
+                if decoded:
+                    yield decoded
+
+            if decode_content:
+                # On CPython and PyPy, we should never need to flush the
+                # decoder. However, on Jython we *might* need to, so
+                # lets defensively do it anyway.
+                decoded = self._flush_decoder()
+                if decoded:  # Platform-specific: Jython.
+                    yield decoded
+
+            # Chunk content ends with \r\n: discard it.
+            while True:
+                line = self._fp.fp.readline()
+                if not line:
+                    # Some sites may not end with '\r\n'.
+                    break
+                if line == b"\r\n":
+                    break
+
+            # We read everything; close the "file".
+            if self._original_response:
+                self._original_response.close()
+
+    def geturl(self):
+        """
+        Returns the URL that was the source of this response.
+        If the request that generated this response redirected, this method
+        will return the final redirect location.
+        """
+        if self.retries is not None and len(self.retries.history):
+            return self.retries.history[-1].redirect_location
+        else:
+            return self._request_url
+
+    def __iter__(self):
+        buffer = []
+        for chunk in self.stream(decode_content=True):
+            if b"\n" in chunk:
+                chunk = chunk.split(b"\n")
+                yield b"".join(buffer) + chunk[0] + b"\n"
+                for x in chunk[1:-1]:
+                    yield x + b"\n"
+                if chunk[-1]:
+                    buffer = [chunk[-1]]
+                else:
+                    buffer = []
+            else:
+                buffer.append(chunk)
+        if buffer:
+            yield b"".join(buffer)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/__init__.py
new file mode 100644
index 0000000..4547fc5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/__init__.py
@@ -0,0 +1,49 @@
+from __future__ import absolute_import
+
+# For backwards compatibility, provide imports that used to be here.
+from .connection import is_connection_dropped
+from .request import SKIP_HEADER, SKIPPABLE_HEADERS, make_headers
+from .response import is_fp_closed
+from .retry import Retry
+from .ssl_ import (
+    ALPN_PROTOCOLS,
+    HAS_SNI,
+    IS_PYOPENSSL,
+    IS_SECURETRANSPORT,
+    PROTOCOL_TLS,
+    SSLContext,
+    assert_fingerprint,
+    resolve_cert_reqs,
+    resolve_ssl_version,
+    ssl_wrap_socket,
+)
+from .timeout import Timeout, current_time
+from .url import Url, get_host, parse_url, split_first
+from .wait import wait_for_read, wait_for_write
+
+__all__ = (
+    "HAS_SNI",
+    "IS_PYOPENSSL",
+    "IS_SECURETRANSPORT",
+    "SSLContext",
+    "PROTOCOL_TLS",
+    "ALPN_PROTOCOLS",
+    "Retry",
+    "Timeout",
+    "Url",
+    "assert_fingerprint",
+    "current_time",
+    "is_connection_dropped",
+    "is_fp_closed",
+    "get_host",
+    "parse_url",
+    "make_headers",
+    "resolve_cert_reqs",
+    "resolve_ssl_version",
+    "split_first",
+    "ssl_wrap_socket",
+    "wait_for_read",
+    "wait_for_write",
+    "SKIP_HEADER",
+    "SKIPPABLE_HEADERS",
+)
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/connection.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/connection.py
new file mode 100644
index 0000000..6af1138
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/connection.py
@@ -0,0 +1,149 @@
+from __future__ import absolute_import
+
+import socket
+
+from ..contrib import _appengine_environ
+from ..exceptions import LocationParseError
+from ..packages import six
+from .wait import NoWayToWaitForSocketError, wait_for_read
+
+
+def is_connection_dropped(conn):  # Platform-specific
+    """
+    Returns True if the connection is dropped and should be closed.
+
+    :param conn:
+        :class:`http.client.HTTPConnection` object.
+
+    Note: For platforms like AppEngine, this will always return ``False`` to
+    let the platform handle connection recycling transparently for us.
+    """
+    sock = getattr(conn, "sock", False)
+    if sock is False:  # Platform-specific: AppEngine
+        return False
+    if sock is None:  # Connection already closed (such as by httplib).
+        return True
+    try:
+        # Returns True if readable, which here means it's been dropped
+        return wait_for_read(sock, timeout=0.0)
+    except NoWayToWaitForSocketError:  # Platform-specific: AppEngine
+        return False
+
+
+# This function is copied from socket.py in the Python 2.7 standard
+# library test suite. Added to its signature is only `socket_options`.
+# One additional modification is that we avoid binding to IPv6 servers
+# discovered in DNS if the system doesn't have IPv6 functionality.
+def create_connection(
+    address,
+    timeout=socket._GLOBAL_DEFAULT_TIMEOUT,
+    source_address=None,
+    socket_options=None,
+):
+    """Connect to *address* and return the socket object.
+
+    Convenience function.  Connect to *address* (a 2-tuple ``(host,
+    port)``) and return the socket object.  Passing the optional
+    *timeout* parameter will set the timeout on the socket instance
+    before attempting to connect.  If no *timeout* is supplied, the
+    global default timeout setting returned by :func:`socket.getdefaulttimeout`
+    is used.  If *source_address* is set it must be a tuple of (host, port)
+    for the socket to bind as a source address before making the connection.
+    An host of '' or port 0 tells the OS to use the default.
+    """
+
+    host, port = address
+    if host.startswith("["):
+        host = host.strip("[]")
+    err = None
+
+    # Using the value from allowed_gai_family() in the context of getaddrinfo lets
+    # us select whether to work with IPv4 DNS records, IPv6 records, or both.
+    # The original create_connection function always returns all records.
+    family = allowed_gai_family()
+
+    try:
+        host.encode("idna")
+    except UnicodeError:
+        return six.raise_from(
+            LocationParseError(u"'%s', label empty or too long" % host), None
+        )
+
+    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
+        af, socktype, proto, canonname, sa = res
+        sock = None
+        try:
+            sock = socket.socket(af, socktype, proto)
+
+            # If provided, set socket level options before connecting.
+            _set_socket_options(sock, socket_options)
+
+            if timeout is not socket._GLOBAL_DEFAULT_TIMEOUT:
+                sock.settimeout(timeout)
+            if source_address:
+                sock.bind(source_address)
+            sock.connect(sa)
+            return sock
+
+        except socket.error as e:
+            err = e
+            if sock is not None:
+                sock.close()
+                sock = None
+
+    if err is not None:
+        raise err
+
+    raise socket.error("getaddrinfo returns an empty list")
+
+
+def _set_socket_options(sock, options):
+    if options is None:
+        return
+
+    for opt in options:
+        sock.setsockopt(*opt)
+
+
+def allowed_gai_family():
+    """This function is designed to work in the context of
+    getaddrinfo, where family=socket.AF_UNSPEC is the default and
+    will perform a DNS search for both IPv6 and IPv4 records."""
+
+    family = socket.AF_INET
+    if HAS_IPV6:
+        family = socket.AF_UNSPEC
+    return family
+
+
+def _has_ipv6(host):
+    """Returns True if the system can bind an IPv6 address."""
+    sock = None
+    has_ipv6 = False
+
+    # App Engine doesn't support IPV6 sockets and actually has a quota on the
+    # number of sockets that can be used, so just early out here instead of
+    # creating a socket needlessly.
+    # See https://github.com/urllib3/urllib3/issues/1446
+    if _appengine_environ.is_appengine_sandbox():
+        return False
+
+    if socket.has_ipv6:
+        # has_ipv6 returns true if cPython was compiled with IPv6 support.
+        # It does not tell us if the system has IPv6 support enabled. To
+        # determine that we must bind to an IPv6 address.
+        # https://github.com/urllib3/urllib3/pull/611
+        # https://bugs.python.org/issue658327
+        try:
+            sock = socket.socket(socket.AF_INET6)
+            sock.bind((host, 0))
+            has_ipv6 = True
+        except Exception:
+            pass
+
+    if sock:
+        sock.close()
+    return has_ipv6
+
+
+HAS_IPV6 = _has_ipv6("::1")
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/proxy.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/proxy.py
new file mode 100644
index 0000000..2199cc7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/proxy.py
@@ -0,0 +1,57 @@
+from .ssl_ import create_urllib3_context, resolve_cert_reqs, resolve_ssl_version
+
+
+def connection_requires_http_tunnel(
+    proxy_url=None, proxy_config=None, destination_scheme=None
+):
+    """
+    Returns True if the connection requires an HTTP CONNECT through the proxy.
+
+    :param URL proxy_url:
+        URL of the proxy.
+    :param ProxyConfig proxy_config:
+        Proxy configuration from poolmanager.py
+    :param str destination_scheme:
+        The scheme of the destination. (i.e https, http, etc)
+    """
+    # If we're not using a proxy, no way to use a tunnel.
+    if proxy_url is None:
+        return False
+
+    # HTTP destinations never require tunneling, we always forward.
+    if destination_scheme == "http":
+        return False
+
+    # Support for forwarding with HTTPS proxies and HTTPS destinations.
+    if (
+        proxy_url.scheme == "https"
+        and proxy_config
+        and proxy_config.use_forwarding_for_https
+    ):
+        return False
+
+    # Otherwise always use a tunnel.
+    return True
+
+
+def create_proxy_ssl_context(
+    ssl_version, cert_reqs, ca_certs=None, ca_cert_dir=None, ca_cert_data=None
+):
+    """
+    Generates a default proxy ssl context if one hasn't been provided by the
+    user.
+    """
+    ssl_context = create_urllib3_context(
+        ssl_version=resolve_ssl_version(ssl_version),
+        cert_reqs=resolve_cert_reqs(cert_reqs),
+    )
+
+    if (
+        not ca_certs
+        and not ca_cert_dir
+        and not ca_cert_data
+        and hasattr(ssl_context, "load_default_certs")
+    ):
+        ssl_context.load_default_certs()
+
+    return ssl_context
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/queue.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/queue.py
new file mode 100644
index 0000000..4178410
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/queue.py
@@ -0,0 +1,22 @@
+import collections
+
+from ..packages import six
+from ..packages.six.moves import queue
+
+if six.PY2:
+    # Queue is imported for side effects on MS Windows. See issue #229.
+    import Queue as _unused_module_Queue  # noqa: F401
+
+
+class LifoQueue(queue.Queue):
+    def _init(self, _):
+        self.queue = collections.deque()
+
+    def _qsize(self, len=len):
+        return len(self.queue)
+
+    def _put(self, item):
+        self.queue.append(item)
+
+    def _get(self):
+        return self.queue.pop()
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/request.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/request.py
new file mode 100644
index 0000000..330766e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/request.py
@@ -0,0 +1,137 @@
+from __future__ import absolute_import
+
+from base64 import b64encode
+
+from ..exceptions import UnrewindableBodyError
+from ..packages.six import b, integer_types
+
+# Pass as a value within ``headers`` to skip
+# emitting some HTTP headers that are added automatically.
+# The only headers that are supported are ``Accept-Encoding``,
+# ``Host``, and ``User-Agent``.
+SKIP_HEADER = "@@@SKIP_HEADER@@@"
+SKIPPABLE_HEADERS = frozenset(["accept-encoding", "host", "user-agent"])
+
+ACCEPT_ENCODING = "gzip,deflate"
+
+_FAILEDTELL = object()
+
+
+def make_headers(
+    keep_alive=None,
+    accept_encoding=None,
+    user_agent=None,
+    basic_auth=None,
+    proxy_basic_auth=None,
+    disable_cache=None,
+):
+    """
+    Shortcuts for generating request headers.
+
+    :param keep_alive:
+        If ``True``, adds 'connection: keep-alive' header.
+
+    :param accept_encoding:
+        Can be a boolean, list, or string.
+        ``True`` translates to 'gzip,deflate'.
+        List will get joined by comma.
+        String will be used as provided.
+
+    :param user_agent:
+        String representing the user-agent you want, such as
+        "python-urllib3/0.6"
+
+    :param basic_auth:
+        Colon-separated username:password string for 'authorization: basic ...'
+        auth header.
+
+    :param proxy_basic_auth:
+        Colon-separated username:password string for 'proxy-authorization: basic ...'
+        auth header.
+
+    :param disable_cache:
+        If ``True``, adds 'cache-control: no-cache' header.
+
+    Example::
+
+        >>> make_headers(keep_alive=True, user_agent="Batman/1.0")
+        {'connection': 'keep-alive', 'user-agent': 'Batman/1.0'}
+        >>> make_headers(accept_encoding=True)
+        {'accept-encoding': 'gzip,deflate'}
+    """
+    headers = {}
+    if accept_encoding:
+        if isinstance(accept_encoding, str):
+            pass
+        elif isinstance(accept_encoding, list):
+            accept_encoding = ",".join(accept_encoding)
+        else:
+            accept_encoding = ACCEPT_ENCODING
+        headers["accept-encoding"] = accept_encoding
+
+    if user_agent:
+        headers["user-agent"] = user_agent
+
+    if keep_alive:
+        headers["connection"] = "keep-alive"
+
+    if basic_auth:
+        headers["authorization"] = "Basic " + b64encode(b(basic_auth)).decode("utf-8")
+
+    if proxy_basic_auth:
+        headers["proxy-authorization"] = "Basic " + b64encode(
+            b(proxy_basic_auth)
+        ).decode("utf-8")
+
+    if disable_cache:
+        headers["cache-control"] = "no-cache"
+
+    return headers
+
+
+def set_file_position(body, pos):
+    """
+    If a position is provided, move file to that point.
+    Otherwise, we'll attempt to record a position for future use.
+    """
+    if pos is not None:
+        rewind_body(body, pos)
+    elif getattr(body, "tell", None) is not None:
+        try:
+            pos = body.tell()
+        except (IOError, OSError):
+            # This differentiates from None, allowing us to catch
+            # a failed `tell()` later when trying to rewind the body.
+            pos = _FAILEDTELL
+
+    return pos
+
+
+def rewind_body(body, body_pos):
+    """
+    Attempt to rewind body to a certain position.
+    Primarily used for request redirects and retries.
+
+    :param body:
+        File-like object that supports seek.
+
+    :param int pos:
+        Position to seek to in file.
+    """
+    body_seek = getattr(body, "seek", None)
+    if body_seek is not None and isinstance(body_pos, integer_types):
+        try:
+            body_seek(body_pos)
+        except (IOError, OSError):
+            raise UnrewindableBodyError(
+                "An error occurred when rewinding request body for redirect/retry."
+            )
+    elif body_pos is _FAILEDTELL:
+        raise UnrewindableBodyError(
+            "Unable to record file position for rewinding "
+            "request body during a redirect/retry."
+        )
+    else:
+        raise ValueError(
+            "body_pos must be of type integer, instead it was %s." % type(body_pos)
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/response.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/response.py
new file mode 100644
index 0000000..5ea609c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/response.py
@@ -0,0 +1,107 @@
+from __future__ import absolute_import
+
+from email.errors import MultipartInvariantViolationDefect, StartBoundaryNotFoundDefect
+
+from ..exceptions import HeaderParsingError
+from ..packages.six.moves import http_client as httplib
+
+
+def is_fp_closed(obj):
+    """
+    Checks whether a given file-like object is closed.
+
+    :param obj:
+        The file-like object to check.
+    """
+
+    try:
+        # Check `isclosed()` first, in case Python3 doesn't set `closed`.
+        # GH Issue #928
+        return obj.isclosed()
+    except AttributeError:
+        pass
+
+    try:
+        # Check via the official file-like-object way.
+        return obj.closed
+    except AttributeError:
+        pass
+
+    try:
+        # Check if the object is a container for another file-like object that
+        # gets released on exhaustion (e.g. HTTPResponse).
+        return obj.fp is None
+    except AttributeError:
+        pass
+
+    raise ValueError("Unable to determine whether fp is closed.")
+
+
+def assert_header_parsing(headers):
+    """
+    Asserts whether all headers have been successfully parsed.
+    Extracts encountered errors from the result of parsing headers.
+
+    Only works on Python 3.
+
+    :param http.client.HTTPMessage headers: Headers to verify.
+
+    :raises urllib3.exceptions.HeaderParsingError:
+        If parsing errors are found.
+    """
+
+    # This will fail silently if we pass in the wrong kind of parameter.
+    # To make debugging easier add an explicit check.
+    if not isinstance(headers, httplib.HTTPMessage):
+        raise TypeError("expected httplib.Message, got {0}.".format(type(headers)))
+
+    defects = getattr(headers, "defects", None)
+    get_payload = getattr(headers, "get_payload", None)
+
+    unparsed_data = None
+    if get_payload:
+        # get_payload is actually email.message.Message.get_payload;
+        # we're only interested in the result if it's not a multipart message
+        if not headers.is_multipart():
+            payload = get_payload()
+
+            if isinstance(payload, (bytes, str)):
+                unparsed_data = payload
+    if defects:
+        # httplib is assuming a response body is available
+        # when parsing headers even when httplib only sends
+        # header data to parse_headers() This results in
+        # defects on multipart responses in particular.
+        # See: https://github.com/urllib3/urllib3/issues/800
+
+        # So we ignore the following defects:
+        # - StartBoundaryNotFoundDefect:
+        #     The claimed start boundary was never found.
+        # - MultipartInvariantViolationDefect:
+        #     A message claimed to be a multipart but no subparts were found.
+        defects = [
+            defect
+            for defect in defects
+            if not isinstance(
+                defect, (StartBoundaryNotFoundDefect, MultipartInvariantViolationDefect)
+            )
+        ]
+
+    if defects or unparsed_data:
+        raise HeaderParsingError(defects=defects, unparsed_data=unparsed_data)
+
+
+def is_response_to_head(response):
+    """
+    Checks whether the request of a response has been a HEAD-request.
+    Handles the quirks of AppEngine.
+
+    :param http.client.HTTPResponse response:
+        Response to check if the originating request
+        used 'HEAD' as a method.
+    """
+    # FIXME: Can we do this somehow without accessing private httplib _method?
+    method = response._method
+    if isinstance(method, int):  # Platform-specific: Appengine
+        return method == 3
+    return method.upper() == "HEAD"
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/retry.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/retry.py
new file mode 100644
index 0000000..3398323
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/retry.py
@@ -0,0 +1,620 @@
+from __future__ import absolute_import
+
+import email
+import logging
+import re
+import time
+import warnings
+from collections import namedtuple
+from itertools import takewhile
+
+from ..exceptions import (
+    ConnectTimeoutError,
+    InvalidHeader,
+    MaxRetryError,
+    ProtocolError,
+    ProxyError,
+    ReadTimeoutError,
+    ResponseError,
+)
+from ..packages import six
+
+log = logging.getLogger(__name__)
+
+
+# Data structure for representing the metadata of requests that result in a retry.
+RequestHistory = namedtuple(
+    "RequestHistory", ["method", "url", "error", "status", "redirect_location"]
+)
+
+
+# TODO: In v2 we can remove this sentinel and metaclass with deprecated options.
+_Default = object()
+
+
+class _RetryMeta(type):
+    @property
+    def DEFAULT_METHOD_WHITELIST(cls):
+        warnings.warn(
+            "Using 'Retry.DEFAULT_METHOD_WHITELIST' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_ALLOWED_METHODS' instead",
+            DeprecationWarning,
+        )
+        return cls.DEFAULT_ALLOWED_METHODS
+
+    @DEFAULT_METHOD_WHITELIST.setter
+    def DEFAULT_METHOD_WHITELIST(cls, value):
+        warnings.warn(
+            "Using 'Retry.DEFAULT_METHOD_WHITELIST' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_ALLOWED_METHODS' instead",
+            DeprecationWarning,
+        )
+        cls.DEFAULT_ALLOWED_METHODS = value
+
+    @property
+    def DEFAULT_REDIRECT_HEADERS_BLACKLIST(cls):
+        warnings.warn(
+            "Using 'Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT' instead",
+            DeprecationWarning,
+        )
+        return cls.DEFAULT_REMOVE_HEADERS_ON_REDIRECT
+
+    @DEFAULT_REDIRECT_HEADERS_BLACKLIST.setter
+    def DEFAULT_REDIRECT_HEADERS_BLACKLIST(cls, value):
+        warnings.warn(
+            "Using 'Retry.DEFAULT_REDIRECT_HEADERS_BLACKLIST' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_REMOVE_HEADERS_ON_REDIRECT' instead",
+            DeprecationWarning,
+        )
+        cls.DEFAULT_REMOVE_HEADERS_ON_REDIRECT = value
+
+    @property
+    def BACKOFF_MAX(cls):
+        warnings.warn(
+            "Using 'Retry.BACKOFF_MAX' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_BACKOFF_MAX' instead",
+            DeprecationWarning,
+        )
+        return cls.DEFAULT_BACKOFF_MAX
+
+    @BACKOFF_MAX.setter
+    def BACKOFF_MAX(cls, value):
+        warnings.warn(
+            "Using 'Retry.BACKOFF_MAX' is deprecated and "
+            "will be removed in v2.0. Use 'Retry.DEFAULT_BACKOFF_MAX' instead",
+            DeprecationWarning,
+        )
+        cls.DEFAULT_BACKOFF_MAX = value
+
+
+@six.add_metaclass(_RetryMeta)
+class Retry(object):
+    """Retry configuration.
+
+    Each retry attempt will create a new Retry object with updated values, so
+    they can be safely reused.
+
+    Retries can be defined as a default for a pool::
+
+        retries = Retry(connect=5, read=2, redirect=5)
+        http = PoolManager(retries=retries)
+        response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool)::
+
+        response = http.request('GET', 'http://example.com/', retries=Retry(10))
+
+    Retries can be disabled by passing ``False``::
+
+        response = http.request('GET', 'http://example.com/', retries=False)
+
+    Errors will be wrapped in :class:`~urllib3.exceptions.MaxRetryError` unless
+    retries are disabled, in which case the causing exception will be raised.
+
+    :param int total:
+        Total number of retries to allow. Takes precedence over other counts.
+
+        Set to ``None`` to remove this constraint and fall back on other
+        counts.
+
+        Set to ``0`` to fail on the first retry.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int connect:
+        How many connection-related errors to retry on.
+
+        These are errors raised before the request is sent to the remote server,
+        which we assume has not triggered the server to process the request.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int read:
+        How many times to retry on read errors.
+
+        These errors are raised after the request was sent to the server, so the
+        request may have side-effects.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int redirect:
+        How many redirects to perform. Limit this to avoid infinite redirect
+        loops.
+
+        A redirect is a HTTP response with a status code 301, 302, 303, 307 or
+        308.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+        Set to ``False`` to disable and imply ``raise_on_redirect=False``.
+
+    :param int status:
+        How many times to retry on bad status codes.
+
+        These are retries made on responses, where status code matches
+        ``status_forcelist``.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+    :param int other:
+        How many times to retry on other errors.
+
+        Other errors are errors that are not connect, read, redirect or status errors.
+        These errors might be raised after the request was sent to the server, so the
+        request might have side-effects.
+
+        Set to ``0`` to fail on the first retry of this type.
+
+        If ``total`` is not set, it's a good idea to set this to 0 to account
+        for unexpected edge cases and avoid infinite retry loops.
+
+    :param iterable allowed_methods:
+        Set of uppercased HTTP method verbs that we should retry on.
+
+        By default, we only retry on methods which are considered to be
+        idempotent (multiple requests with the same parameters end with the
+        same state). See :attr:`Retry.DEFAULT_ALLOWED_METHODS`.
+
+        Set to a ``False`` value to retry on any verb.
+
+        .. warning::
+
+            Previously this parameter was named ``method_whitelist``, that
+            usage is deprecated in v1.26.0 and will be removed in v2.0.
+
+    :param iterable status_forcelist:
+        A set of integer HTTP status codes that we should force a retry on.
+        A retry is initiated if the request method is in ``allowed_methods``
+        and the response status code is in ``status_forcelist``.
+
+        By default, this is disabled with ``None``.
+
+    :param float backoff_factor:
+        A backoff factor to apply between attempts after the second try
+        (most errors are resolved immediately by a second try without a
+        delay). urllib3 will sleep for::
+
+            {backoff factor} * (2 ** ({number of total retries} - 1))
+
+        seconds. If the backoff_factor is 0.1, then :func:`.sleep` will sleep
+        for [0.0s, 0.2s, 0.4s, ...] between retries. It will never be longer
+        than :attr:`Retry.DEFAULT_BACKOFF_MAX`.
+
+        By default, backoff is disabled (set to 0).
+
+    :param bool raise_on_redirect: Whether, if the number of redirects is
+        exhausted, to raise a MaxRetryError, or to return a response with a
+        response code in the 3xx range.
+
+    :param bool raise_on_status: Similar meaning to ``raise_on_redirect``:
+        whether we should raise an exception, or return a response,
+        if status falls in ``status_forcelist`` range and retries have
+        been exhausted.
+
+    :param tuple history: The history of the request encountered during
+        each call to :meth:`~Retry.increment`. The list is in the order
+        the requests occurred. Each list item is of class :class:`RequestHistory`.
+
+    :param bool respect_retry_after_header:
+        Whether to respect Retry-After header on status codes defined as
+        :attr:`Retry.RETRY_AFTER_STATUS_CODES` or not.
+
+    :param iterable remove_headers_on_redirect:
+        Sequence of headers to remove from the request when a response
+        indicating a redirect is returned before firing off the redirected
+        request.
+    """
+
+    #: Default methods to be used for ``allowed_methods``
+    DEFAULT_ALLOWED_METHODS = frozenset(
+        ["HEAD", "GET", "PUT", "DELETE", "OPTIONS", "TRACE"]
+    )
+
+    #: Default status codes to be used for ``status_forcelist``
+    RETRY_AFTER_STATUS_CODES = frozenset([413, 429, 503])
+
+    #: Default headers to be used for ``remove_headers_on_redirect``
+    DEFAULT_REMOVE_HEADERS_ON_REDIRECT = frozenset(["Authorization"])
+
+    #: Maximum backoff time.
+    DEFAULT_BACKOFF_MAX = 120
+
+    def __init__(
+        self,
+        total=10,
+        connect=None,
+        read=None,
+        redirect=None,
+        status=None,
+        other=None,
+        allowed_methods=_Default,
+        status_forcelist=None,
+        backoff_factor=0,
+        raise_on_redirect=True,
+        raise_on_status=True,
+        history=None,
+        respect_retry_after_header=True,
+        remove_headers_on_redirect=_Default,
+        # TODO: Deprecated, remove in v2.0
+        method_whitelist=_Default,
+    ):
+
+        if method_whitelist is not _Default:
+            if allowed_methods is not _Default:
+                raise ValueError(
+                    "Using both 'allowed_methods' and "
+                    "'method_whitelist' together is not allowed. "
+                    "Instead only use 'allowed_methods'"
+                )
+            warnings.warn(
+                "Using 'method_whitelist' with Retry is deprecated and "
+                "will be removed in v2.0. Use 'allowed_methods' instead",
+                DeprecationWarning,
+                stacklevel=2,
+            )
+            allowed_methods = method_whitelist
+        if allowed_methods is _Default:
+            allowed_methods = self.DEFAULT_ALLOWED_METHODS
+        if remove_headers_on_redirect is _Default:
+            remove_headers_on_redirect = self.DEFAULT_REMOVE_HEADERS_ON_REDIRECT
+
+        self.total = total
+        self.connect = connect
+        self.read = read
+        self.status = status
+        self.other = other
+
+        if redirect is False or total is False:
+            redirect = 0
+            raise_on_redirect = False
+
+        self.redirect = redirect
+        self.status_forcelist = status_forcelist or set()
+        self.allowed_methods = allowed_methods
+        self.backoff_factor = backoff_factor
+        self.raise_on_redirect = raise_on_redirect
+        self.raise_on_status = raise_on_status
+        self.history = history or tuple()
+        self.respect_retry_after_header = respect_retry_after_header
+        self.remove_headers_on_redirect = frozenset(
+            [h.lower() for h in remove_headers_on_redirect]
+        )
+
+    def new(self, **kw):
+        params = dict(
+            total=self.total,
+            connect=self.connect,
+            read=self.read,
+            redirect=self.redirect,
+            status=self.status,
+            other=self.other,
+            status_forcelist=self.status_forcelist,
+            backoff_factor=self.backoff_factor,
+            raise_on_redirect=self.raise_on_redirect,
+            raise_on_status=self.raise_on_status,
+            history=self.history,
+            remove_headers_on_redirect=self.remove_headers_on_redirect,
+            respect_retry_after_header=self.respect_retry_after_header,
+        )
+
+        # TODO: If already given in **kw we use what's given to us
+        # If not given we need to figure out what to pass. We decide
+        # based on whether our class has the 'method_whitelist' property
+        # and if so we pass the deprecated 'method_whitelist' otherwise
+        # we use 'allowed_methods'. Remove in v2.0
+        if "method_whitelist" not in kw and "allowed_methods" not in kw:
+            if "method_whitelist" in self.__dict__:
+                warnings.warn(
+                    "Using 'method_whitelist' with Retry is deprecated and "
+                    "will be removed in v2.0. Use 'allowed_methods' instead",
+                    DeprecationWarning,
+                )
+                params["method_whitelist"] = self.allowed_methods
+            else:
+                params["allowed_methods"] = self.allowed_methods
+
+        params.update(kw)
+        return type(self)(**params)
+
+    @classmethod
+    def from_int(cls, retries, redirect=True, default=None):
+        """Backwards-compatibility for the old retries format."""
+        if retries is None:
+            retries = default if default is not None else cls.DEFAULT
+
+        if isinstance(retries, Retry):
+            return retries
+
+        redirect = bool(redirect) and None
+        new_retries = cls(retries, redirect=redirect)
+        log.debug("Converted retries value: %r -> %r", retries, new_retries)
+        return new_retries
+
+    def get_backoff_time(self):
+        """Formula for computing the current backoff
+
+        :rtype: float
+        """
+        # We want to consider only the last consecutive errors sequence (Ignore redirects).
+        consecutive_errors_len = len(
+            list(
+                takewhile(lambda x: x.redirect_location is None, reversed(self.history))
+            )
+        )
+        if consecutive_errors_len <= 1:
+            return 0
+
+        backoff_value = self.backoff_factor * (2 ** (consecutive_errors_len - 1))
+        return min(self.DEFAULT_BACKOFF_MAX, backoff_value)
+
+    def parse_retry_after(self, retry_after):
+        # Whitespace: https://tools.ietf.org/html/rfc7230#section-3.2.4
+        if re.match(r"^\s*[0-9]+\s*$", retry_after):
+            seconds = int(retry_after)
+        else:
+            retry_date_tuple = email.utils.parsedate_tz(retry_after)
+            if retry_date_tuple is None:
+                raise InvalidHeader("Invalid Retry-After header: %s" % retry_after)
+            if retry_date_tuple[9] is None:  # Python 2
+                # Assume UTC if no timezone was specified
+                # On Python2.7, parsedate_tz returns None for a timezone offset
+                # instead of 0 if no timezone is given, where mktime_tz treats
+                # a None timezone offset as local time.
+                retry_date_tuple = retry_date_tuple[:9] + (0,) + retry_date_tuple[10:]
+
+            retry_date = email.utils.mktime_tz(retry_date_tuple)
+            seconds = retry_date - time.time()
+
+        if seconds < 0:
+            seconds = 0
+
+        return seconds
+
+    def get_retry_after(self, response):
+        """Get the value of Retry-After in seconds."""
+
+        retry_after = response.getheader("Retry-After")
+
+        if retry_after is None:
+            return None
+
+        return self.parse_retry_after(retry_after)
+
+    def sleep_for_retry(self, response=None):
+        retry_after = self.get_retry_after(response)
+        if retry_after:
+            time.sleep(retry_after)
+            return True
+
+        return False
+
+    def _sleep_backoff(self):
+        backoff = self.get_backoff_time()
+        if backoff <= 0:
+            return
+        time.sleep(backoff)
+
+    def sleep(self, response=None):
+        """Sleep between retry attempts.
+
+        This method will respect a server's ``Retry-After`` response header
+        and sleep the duration of the time requested. If that is not present, it
+        will use an exponential backoff. By default, the backoff factor is 0 and
+        this method will return immediately.
+        """
+
+        if self.respect_retry_after_header and response:
+            slept = self.sleep_for_retry(response)
+            if slept:
+                return
+
+        self._sleep_backoff()
+
+    def _is_connection_error(self, err):
+        """Errors when we're fairly sure that the server did not receive the
+        request, so it should be safe to retry.
+        """
+        if isinstance(err, ProxyError):
+            err = err.original_error
+        return isinstance(err, ConnectTimeoutError)
+
+    def _is_read_error(self, err):
+        """Errors that occur after the request has been started, so we should
+        assume that the server began processing it.
+        """
+        return isinstance(err, (ReadTimeoutError, ProtocolError))
+
+    def _is_method_retryable(self, method):
+        """Checks if a given HTTP method should be retried upon, depending if
+        it is included in the allowed_methods
+        """
+        # TODO: For now favor if the Retry implementation sets its own method_whitelist
+        # property outside of our constructor to avoid breaking custom implementations.
+        if "method_whitelist" in self.__dict__:
+            warnings.warn(
+                "Using 'method_whitelist' with Retry is deprecated and "
+                "will be removed in v2.0. Use 'allowed_methods' instead",
+                DeprecationWarning,
+            )
+            allowed_methods = self.method_whitelist
+        else:
+            allowed_methods = self.allowed_methods
+
+        if allowed_methods and method.upper() not in allowed_methods:
+            return False
+        return True
+
+    def is_retry(self, method, status_code, has_retry_after=False):
+        """Is this method/status code retryable? (Based on allowlists and control
+        variables such as the number of total retries to allow, whether to
+        respect the Retry-After header, whether this header is present, and
+        whether the returned status code is on the list of status codes to
+        be retried upon on the presence of the aforementioned header)
+        """
+        if not self._is_method_retryable(method):
+            return False
+
+        if self.status_forcelist and status_code in self.status_forcelist:
+            return True
+
+        return (
+            self.total
+            and self.respect_retry_after_header
+            and has_retry_after
+            and (status_code in self.RETRY_AFTER_STATUS_CODES)
+        )
+
+    def is_exhausted(self):
+        """Are we out of retries?"""
+        retry_counts = (
+            self.total,
+            self.connect,
+            self.read,
+            self.redirect,
+            self.status,
+            self.other,
+        )
+        retry_counts = list(filter(None, retry_counts))
+        if not retry_counts:
+            return False
+
+        return min(retry_counts) < 0
+
+    def increment(
+        self,
+        method=None,
+        url=None,
+        response=None,
+        error=None,
+        _pool=None,
+        _stacktrace=None,
+    ):
+        """Return a new Retry object with incremented retry counters.
+
+        :param response: A response object, or None, if the server did not
+            return a response.
+        :type response: :class:`~urllib3.response.HTTPResponse`
+        :param Exception error: An error encountered during the request, or
+            None if the response was received successfully.
+
+        :return: A new ``Retry`` object.
+        """
+        if self.total is False and error:
+            # Disabled, indicate to re-raise the error.
+            raise six.reraise(type(error), error, _stacktrace)
+
+        total = self.total
+        if total is not None:
+            total -= 1
+
+        connect = self.connect
+        read = self.read
+        redirect = self.redirect
+        status_count = self.status
+        other = self.other
+        cause = "unknown"
+        status = None
+        redirect_location = None
+
+        if error and self._is_connection_error(error):
+            # Connect retry?
+            if connect is False:
+                raise six.reraise(type(error), error, _stacktrace)
+            elif connect is not None:
+                connect -= 1
+
+        elif error and self._is_read_error(error):
+            # Read retry?
+            if read is False or not self._is_method_retryable(method):
+                raise six.reraise(type(error), error, _stacktrace)
+            elif read is not None:
+                read -= 1
+
+        elif error:
+            # Other retry?
+            if other is not None:
+                other -= 1
+
+        elif response and response.get_redirect_location():
+            # Redirect retry?
+            if redirect is not None:
+                redirect -= 1
+            cause = "too many redirects"
+            redirect_location = response.get_redirect_location()
+            status = response.status
+
+        else:
+            # Incrementing because of a server error like a 500 in
+            # status_forcelist and the given method is in the allowed_methods
+            cause = ResponseError.GENERIC_ERROR
+            if response and response.status:
+                if status_count is not None:
+                    status_count -= 1
+                cause = ResponseError.SPECIFIC_ERROR.format(status_code=response.status)
+                status = response.status
+
+        history = self.history + (
+            RequestHistory(method, url, error, status, redirect_location),
+        )
+
+        new_retry = self.new(
+            total=total,
+            connect=connect,
+            read=read,
+            redirect=redirect,
+            status=status_count,
+            other=other,
+            history=history,
+        )
+
+        if new_retry.is_exhausted():
+            raise MaxRetryError(_pool, url, error or ResponseError(cause))
+
+        log.debug("Incremented Retry for (url='%s'): %r", url, new_retry)
+
+        return new_retry
+
+    def __repr__(self):
+        return (
+            "{cls.__name__}(total={self.total}, connect={self.connect}, "
+            "read={self.read}, redirect={self.redirect}, status={self.status})"
+        ).format(cls=type(self), self=self)
+
+    def __getattr__(self, item):
+        if item == "method_whitelist":
+            # TODO: Remove this deprecated alias in v2.0
+            warnings.warn(
+                "Using 'method_whitelist' with Retry is deprecated and "
+                "will be removed in v2.0. Use 'allowed_methods' instead",
+                DeprecationWarning,
+            )
+            return self.allowed_methods
+        try:
+            return getattr(super(Retry, self), item)
+        except AttributeError:
+            return getattr(Retry, item)
+
+
+# For backwards compatibility (equivalent to pre-v1.9):
+Retry.DEFAULT = Retry(3)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_.py
new file mode 100644
index 0000000..2b45d39
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_.py
@@ -0,0 +1,495 @@
+from __future__ import absolute_import
+
+import hmac
+import os
+import sys
+import warnings
+from binascii import hexlify, unhexlify
+from hashlib import md5, sha1, sha256
+
+from ..exceptions import (
+    InsecurePlatformWarning,
+    ProxySchemeUnsupported,
+    SNIMissingWarning,
+    SSLError,
+)
+from ..packages import six
+from .url import BRACELESS_IPV6_ADDRZ_RE, IPV4_RE
+
+SSLContext = None
+SSLTransport = None
+HAS_SNI = False
+IS_PYOPENSSL = False
+IS_SECURETRANSPORT = False
+ALPN_PROTOCOLS = ["http/1.1"]
+
+# Maps the length of a digest to a possible hash function producing this digest
+HASHFUNC_MAP = {32: md5, 40: sha1, 64: sha256}
+
+
+def _const_compare_digest_backport(a, b):
+    """
+    Compare two digests of equal length in constant time.
+
+    The digests must be of type str/bytes.
+    Returns True if the digests match, and False otherwise.
+    """
+    result = abs(len(a) - len(b))
+    for left, right in zip(bytearray(a), bytearray(b)):
+        result |= left ^ right
+    return result == 0
+
+
+_const_compare_digest = getattr(hmac, "compare_digest", _const_compare_digest_backport)
+
+try:  # Test for SSL features
+    import ssl
+    from ssl import CERT_REQUIRED, wrap_socket
+except ImportError:
+    pass
+
+try:
+    from ssl import HAS_SNI  # Has SNI?
+except ImportError:
+    pass
+
+try:
+    from .ssltransport import SSLTransport
+except ImportError:
+    pass
+
+
+try:  # Platform-specific: Python 3.6
+    from ssl import PROTOCOL_TLS
+
+    PROTOCOL_SSLv23 = PROTOCOL_TLS
+except ImportError:
+    try:
+        from ssl import PROTOCOL_SSLv23 as PROTOCOL_TLS
+
+        PROTOCOL_SSLv23 = PROTOCOL_TLS
+    except ImportError:
+        PROTOCOL_SSLv23 = PROTOCOL_TLS = 2
+
+try:
+    from ssl import PROTOCOL_TLS_CLIENT
+except ImportError:
+    PROTOCOL_TLS_CLIENT = PROTOCOL_TLS
+
+
+try:
+    from ssl import OP_NO_COMPRESSION, OP_NO_SSLv2, OP_NO_SSLv3
+except ImportError:
+    OP_NO_SSLv2, OP_NO_SSLv3 = 0x1000000, 0x2000000
+    OP_NO_COMPRESSION = 0x20000
+
+
+try:  # OP_NO_TICKET was added in Python 3.6
+    from ssl import OP_NO_TICKET
+except ImportError:
+    OP_NO_TICKET = 0x4000
+
+
+# A secure default.
+# Sources for more information on TLS ciphers:
+#
+# - https://wiki.mozilla.org/Security/Server_Side_TLS
+# - https://www.ssllabs.com/projects/best-practices/index.html
+# - https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/
+#
+# The general intent is:
+# - prefer cipher suites that offer perfect forward secrecy (DHE/ECDHE),
+# - prefer ECDHE over DHE for better performance,
+# - prefer any AES-GCM and ChaCha20 over any AES-CBC for better performance and
+#   security,
+# - prefer AES-GCM over ChaCha20 because hardware-accelerated AES is common,
+# - disable NULL authentication, MD5 MACs, DSS, and other
+#   insecure ciphers for security reasons.
+# - NOTE: TLS 1.3 cipher suites are managed through a different interface
+#   not exposed by CPython (yet!) and are enabled by default if they're available.
+DEFAULT_CIPHERS = ":".join(
+    [
+        "ECDHE+AESGCM",
+        "ECDHE+CHACHA20",
+        "DHE+AESGCM",
+        "DHE+CHACHA20",
+        "ECDH+AESGCM",
+        "DH+AESGCM",
+        "ECDH+AES",
+        "DH+AES",
+        "RSA+AESGCM",
+        "RSA+AES",
+        "!aNULL",
+        "!eNULL",
+        "!MD5",
+        "!DSS",
+    ]
+)
+
+try:
+    from ssl import SSLContext  # Modern SSL?
+except ImportError:
+
+    class SSLContext(object):  # Platform-specific: Python 2
+        def __init__(self, protocol_version):
+            self.protocol = protocol_version
+            # Use default values from a real SSLContext
+            self.check_hostname = False
+            self.verify_mode = ssl.CERT_NONE
+            self.ca_certs = None
+            self.options = 0
+            self.certfile = None
+            self.keyfile = None
+            self.ciphers = None
+
+        def load_cert_chain(self, certfile, keyfile):
+            self.certfile = certfile
+            self.keyfile = keyfile
+
+        def load_verify_locations(self, cafile=None, capath=None, cadata=None):
+            self.ca_certs = cafile
+
+            if capath is not None:
+                raise SSLError("CA directories not supported in older Pythons")
+
+            if cadata is not None:
+                raise SSLError("CA data not supported in older Pythons")
+
+        def set_ciphers(self, cipher_suite):
+            self.ciphers = cipher_suite
+
+        def wrap_socket(self, socket, server_hostname=None, server_side=False):
+            warnings.warn(
+                "A true SSLContext object is not available. This prevents "
+                "urllib3 from configuring SSL appropriately and may cause "
+                "certain SSL connections to fail. You can upgrade to a newer "
+                "version of Python to solve this. For more information, see "
+                "https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html"
+                "#ssl-warnings",
+                InsecurePlatformWarning,
+            )
+            kwargs = {
+                "keyfile": self.keyfile,
+                "certfile": self.certfile,
+                "ca_certs": self.ca_certs,
+                "cert_reqs": self.verify_mode,
+                "ssl_version": self.protocol,
+                "server_side": server_side,
+            }
+            return wrap_socket(socket, ciphers=self.ciphers, **kwargs)
+
+
+def assert_fingerprint(cert, fingerprint):
+    """
+    Checks if given fingerprint matches the supplied certificate.
+
+    :param cert:
+        Certificate as bytes object.
+    :param fingerprint:
+        Fingerprint as string of hexdigits, can be interspersed by colons.
+    """
+
+    fingerprint = fingerprint.replace(":", "").lower()
+    digest_length = len(fingerprint)
+    hashfunc = HASHFUNC_MAP.get(digest_length)
+    if not hashfunc:
+        raise SSLError("Fingerprint of invalid length: {0}".format(fingerprint))
+
+    # We need encode() here for py32; works on py2 and p33.
+    fingerprint_bytes = unhexlify(fingerprint.encode())
+
+    cert_digest = hashfunc(cert).digest()
+
+    if not _const_compare_digest(cert_digest, fingerprint_bytes):
+        raise SSLError(
+            'Fingerprints did not match. Expected "{0}", got "{1}".'.format(
+                fingerprint, hexlify(cert_digest)
+            )
+        )
+
+
+def resolve_cert_reqs(candidate):
+    """
+    Resolves the argument to a numeric constant, which can be passed to
+    the wrap_socket function/method from the ssl module.
+    Defaults to :data:`ssl.CERT_REQUIRED`.
+    If given a string it is assumed to be the name of the constant in the
+    :mod:`ssl` module or its abbreviation.
+    (So you can specify `REQUIRED` instead of `CERT_REQUIRED`.
+    If it's neither `None` nor a string we assume it is already the numeric
+    constant which can directly be passed to wrap_socket.
+    """
+    if candidate is None:
+        return CERT_REQUIRED
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, "CERT_" + candidate)
+        return res
+
+    return candidate
+
+
+def resolve_ssl_version(candidate):
+    """
+    like resolve_cert_reqs
+    """
+    if candidate is None:
+        return PROTOCOL_TLS
+
+    if isinstance(candidate, str):
+        res = getattr(ssl, candidate, None)
+        if res is None:
+            res = getattr(ssl, "PROTOCOL_" + candidate)
+        return res
+
+    return candidate
+
+
+def create_urllib3_context(
+    ssl_version=None, cert_reqs=None, options=None, ciphers=None
+):
+    """All arguments have the same meaning as ``ssl_wrap_socket``.
+
+    By default, this function does a lot of the same work that
+    ``ssl.create_default_context`` does on Python 3.4+. It:
+
+    - Disables SSLv2, SSLv3, and compression
+    - Sets a restricted set of server ciphers
+
+    If you wish to enable SSLv3, you can do::
+
+        from pip._vendor.urllib3.util import ssl_
+        context = ssl_.create_urllib3_context()
+        context.options &= ~ssl_.OP_NO_SSLv3
+
+    You can do the same to enable compression (substituting ``COMPRESSION``
+    for ``SSLv3`` in the last line above).
+
+    :param ssl_version:
+        The desired protocol version to use. This will default to
+        PROTOCOL_SSLv23 which will negotiate the highest protocol that both
+        the server and your installation of OpenSSL support.
+    :param cert_reqs:
+        Whether to require the certificate verification. This defaults to
+        ``ssl.CERT_REQUIRED``.
+    :param options:
+        Specific OpenSSL options. These default to ``ssl.OP_NO_SSLv2``,
+        ``ssl.OP_NO_SSLv3``, ``ssl.OP_NO_COMPRESSION``, and ``ssl.OP_NO_TICKET``.
+    :param ciphers:
+        Which cipher suites to allow the server to select.
+    :returns:
+        Constructed SSLContext object with specified options
+    :rtype: SSLContext
+    """
+    # PROTOCOL_TLS is deprecated in Python 3.10
+    if not ssl_version or ssl_version == PROTOCOL_TLS:
+        ssl_version = PROTOCOL_TLS_CLIENT
+
+    context = SSLContext(ssl_version)
+
+    context.set_ciphers(ciphers or DEFAULT_CIPHERS)
+
+    # Setting the default here, as we may have no ssl module on import
+    cert_reqs = ssl.CERT_REQUIRED if cert_reqs is None else cert_reqs
+
+    if options is None:
+        options = 0
+        # SSLv2 is easily broken and is considered harmful and dangerous
+        options |= OP_NO_SSLv2
+        # SSLv3 has several problems and is now dangerous
+        options |= OP_NO_SSLv3
+        # Disable compression to prevent CRIME attacks for OpenSSL 1.0+
+        # (issue #309)
+        options |= OP_NO_COMPRESSION
+        # TLSv1.2 only. Unless set explicitly, do not request tickets.
+        # This may save some bandwidth on wire, and although the ticket is encrypted,
+        # there is a risk associated with it being on wire,
+        # if the server is not rotating its ticketing keys properly.
+        options |= OP_NO_TICKET
+
+    context.options |= options
+
+    # Enable post-handshake authentication for TLS 1.3, see GH #1634. PHA is
+    # necessary for conditional client cert authentication with TLS 1.3.
+    # The attribute is None for OpenSSL <= 1.1.0 or does not exist in older
+    # versions of Python.  We only enable on Python 3.7.4+ or if certificate
+    # verification is enabled to work around Python issue #37428
+    # See: https://bugs.python.org/issue37428
+    if (cert_reqs == ssl.CERT_REQUIRED or sys.version_info >= (3, 7, 4)) and getattr(
+        context, "post_handshake_auth", None
+    ) is not None:
+        context.post_handshake_auth = True
+
+    def disable_check_hostname():
+        if (
+            getattr(context, "check_hostname", None) is not None
+        ):  # Platform-specific: Python 3.2
+            # We do our own verification, including fingerprints and alternative
+            # hostnames. So disable it here
+            context.check_hostname = False
+
+    # The order of the below lines setting verify_mode and check_hostname
+    # matter due to safe-guards SSLContext has to prevent an SSLContext with
+    # check_hostname=True, verify_mode=NONE/OPTIONAL. This is made even more
+    # complex because we don't know whether PROTOCOL_TLS_CLIENT will be used
+    # or not so we don't know the initial state of the freshly created SSLContext.
+    if cert_reqs == ssl.CERT_REQUIRED:
+        context.verify_mode = cert_reqs
+        disable_check_hostname()
+    else:
+        disable_check_hostname()
+        context.verify_mode = cert_reqs
+
+    # Enable logging of TLS session keys via defacto standard environment variable
+    # 'SSLKEYLOGFILE', if the feature is available (Python 3.8+). Skip empty values.
+    if hasattr(context, "keylog_filename"):
+        sslkeylogfile = os.environ.get("SSLKEYLOGFILE")
+        if sslkeylogfile:
+            context.keylog_filename = sslkeylogfile
+
+    return context
+
+
+def ssl_wrap_socket(
+    sock,
+    keyfile=None,
+    certfile=None,
+    cert_reqs=None,
+    ca_certs=None,
+    server_hostname=None,
+    ssl_version=None,
+    ciphers=None,
+    ssl_context=None,
+    ca_cert_dir=None,
+    key_password=None,
+    ca_cert_data=None,
+    tls_in_tls=False,
+):
+    """
+    All arguments except for server_hostname, ssl_context, and ca_cert_dir have
+    the same meaning as they do when using :func:`ssl.wrap_socket`.
+
+    :param server_hostname:
+        When SNI is supported, the expected hostname of the certificate
+    :param ssl_context:
+        A pre-made :class:`SSLContext` object. If none is provided, one will
+        be created using :func:`create_urllib3_context`.
+    :param ciphers:
+        A string of ciphers we wish the client to support.
+    :param ca_cert_dir:
+        A directory containing CA certificates in multiple separate files, as
+        supported by OpenSSL's -CApath flag or the capath argument to
+        SSLContext.load_verify_locations().
+    :param key_password:
+        Optional password if the keyfile is encrypted.
+    :param ca_cert_data:
+        Optional string containing CA certificates in PEM format suitable for
+        passing as the cadata parameter to SSLContext.load_verify_locations()
+    :param tls_in_tls:
+        Use SSLTransport to wrap the existing socket.
+    """
+    context = ssl_context
+    if context is None:
+        # Note: This branch of code and all the variables in it are no longer
+        # used by urllib3 itself. We should consider deprecating and removing
+        # this code.
+        context = create_urllib3_context(ssl_version, cert_reqs, ciphers=ciphers)
+
+    if ca_certs or ca_cert_dir or ca_cert_data:
+        try:
+            context.load_verify_locations(ca_certs, ca_cert_dir, ca_cert_data)
+        except (IOError, OSError) as e:
+            raise SSLError(e)
+
+    elif ssl_context is None and hasattr(context, "load_default_certs"):
+        # try to load OS default certs; works well on Windows (require Python3.4+)
+        context.load_default_certs()
+
+    # Attempt to detect if we get the goofy behavior of the
+    # keyfile being encrypted and OpenSSL asking for the
+    # passphrase via the terminal and instead error out.
+    if keyfile and key_password is None and _is_key_file_encrypted(keyfile):
+        raise SSLError("Client private key is encrypted, password is required")
+
+    if certfile:
+        if key_password is None:
+            context.load_cert_chain(certfile, keyfile)
+        else:
+            context.load_cert_chain(certfile, keyfile, key_password)
+
+    try:
+        if hasattr(context, "set_alpn_protocols"):
+            context.set_alpn_protocols(ALPN_PROTOCOLS)
+    except NotImplementedError:  # Defensive: in CI, we always have set_alpn_protocols
+        pass
+
+    # If we detect server_hostname is an IP address then the SNI
+    # extension should not be used according to RFC3546 Section 3.1
+    use_sni_hostname = server_hostname and not is_ipaddress(server_hostname)
+    # SecureTransport uses server_hostname in certificate verification.
+    send_sni = (use_sni_hostname and HAS_SNI) or (
+        IS_SECURETRANSPORT and server_hostname
+    )
+    # Do not warn the user if server_hostname is an invalid SNI hostname.
+    if not HAS_SNI and use_sni_hostname:
+        warnings.warn(
+            "An HTTPS request has been made, but the SNI (Server Name "
+            "Indication) extension to TLS is not available on this platform. "
+            "This may cause the server to present an incorrect TLS "
+            "certificate, which can cause validation failures. You can upgrade to "
+            "a newer version of Python to solve this. For more information, see "
+            "https://urllib3.readthedocs.io/en/1.26.x/advanced-usage.html"
+            "#ssl-warnings",
+            SNIMissingWarning,
+        )
+
+    if send_sni:
+        ssl_sock = _ssl_wrap_socket_impl(
+            sock, context, tls_in_tls, server_hostname=server_hostname
+        )
+    else:
+        ssl_sock = _ssl_wrap_socket_impl(sock, context, tls_in_tls)
+    return ssl_sock
+
+
+def is_ipaddress(hostname):
+    """Detects whether the hostname given is an IPv4 or IPv6 address.
+    Also detects IPv6 addresses with Zone IDs.
+
+    :param str hostname: Hostname to examine.
+    :return: True if the hostname is an IP address, False otherwise.
+    """
+    if not six.PY2 and isinstance(hostname, bytes):
+        # IDN A-label bytes are ASCII compatible.
+        hostname = hostname.decode("ascii")
+    return bool(IPV4_RE.match(hostname) or BRACELESS_IPV6_ADDRZ_RE.match(hostname))
+
+
+def _is_key_file_encrypted(key_file):
+    """Detects if a key file is encrypted or not."""
+    with open(key_file, "r") as f:
+        for line in f:
+            # Look for Proc-Type: 4,ENCRYPTED
+            if "ENCRYPTED" in line:
+                return True
+
+    return False
+
+
+def _ssl_wrap_socket_impl(sock, ssl_context, tls_in_tls, server_hostname=None):
+    if tls_in_tls:
+        if not SSLTransport:
+            # Import error, ssl is not available.
+            raise ProxySchemeUnsupported(
+                "TLS in TLS requires support for the 'ssl' module"
+            )
+
+        SSLTransport._validate_ssl_context_for_tls_in_tls(ssl_context)
+        return SSLTransport(sock, ssl_context, server_hostname)
+
+    if server_hostname:
+        return ssl_context.wrap_socket(sock, server_hostname=server_hostname)
+    else:
+        return ssl_context.wrap_socket(sock)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_match_hostname.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_match_hostname.py
new file mode 100644
index 0000000..1dd950c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssl_match_hostname.py
@@ -0,0 +1,159 @@
+"""The match_hostname() function from Python 3.3.3, essential when using SSL."""
+
+# Note: This file is under the PSF license as the code comes from the python
+# stdlib.   http://docs.python.org/3/license.html
+
+import re
+import sys
+
+# ipaddress has been backported to 2.6+ in pypi.  If it is installed on the
+# system, use it to handle IPAddress ServerAltnames (this was added in
+# python-3.5) otherwise only do DNS matching.  This allows
+# util.ssl_match_hostname to continue to be used in Python 2.7.
+try:
+    import ipaddress
+except ImportError:
+    ipaddress = None
+
+__version__ = "3.5.0.1"
+
+
+class CertificateError(ValueError):
+    pass
+
+
+def _dnsname_match(dn, hostname, max_wildcards=1):
+    """Matching according to RFC 6125, section 6.4.3
+
+    http://tools.ietf.org/html/rfc6125#section-6.4.3
+    """
+    pats = []
+    if not dn:
+        return False
+
+    # Ported from python3-syntax:
+    # leftmost, *remainder = dn.split(r'.')
+    parts = dn.split(r".")
+    leftmost = parts[0]
+    remainder = parts[1:]
+
+    wildcards = leftmost.count("*")
+    if wildcards > max_wildcards:
+        # Issue #17980: avoid denials of service by refusing more
+        # than one wildcard per fragment.  A survey of established
+        # policy among SSL implementations showed it to be a
+        # reasonable choice.
+        raise CertificateError(
+            "too many wildcards in certificate DNS name: " + repr(dn)
+        )
+
+    # speed up common case w/o wildcards
+    if not wildcards:
+        return dn.lower() == hostname.lower()
+
+    # RFC 6125, section 6.4.3, subitem 1.
+    # The client SHOULD NOT attempt to match a presented identifier in which
+    # the wildcard character comprises a label other than the left-most label.
+    if leftmost == "*":
+        # When '*' is a fragment by itself, it matches a non-empty dotless
+        # fragment.
+        pats.append("[^.]+")
+    elif leftmost.startswith("xn--") or hostname.startswith("xn--"):
+        # RFC 6125, section 6.4.3, subitem 3.
+        # The client SHOULD NOT attempt to match a presented identifier
+        # where the wildcard character is embedded within an A-label or
+        # U-label of an internationalized domain name.
+        pats.append(re.escape(leftmost))
+    else:
+        # Otherwise, '*' matches any dotless string, e.g. www*
+        pats.append(re.escape(leftmost).replace(r"\*", "[^.]*"))
+
+    # add the remaining fragments, ignore any wildcards
+    for frag in remainder:
+        pats.append(re.escape(frag))
+
+    pat = re.compile(r"\A" + r"\.".join(pats) + r"\Z", re.IGNORECASE)
+    return pat.match(hostname)
+
+
+def _to_unicode(obj):
+    if isinstance(obj, str) and sys.version_info < (3,):
+        # ignored flake8 # F821 to support python 2.7 function
+        obj = unicode(obj, encoding="ascii", errors="strict")  # noqa: F821
+    return obj
+
+
+def _ipaddress_match(ipname, host_ip):
+    """Exact matching of IP addresses.
+
+    RFC 6125 explicitly doesn't define an algorithm for this
+    (section 1.7.2 - "Out of Scope").
+    """
+    # OpenSSL may add a trailing newline to a subjectAltName's IP address
+    # Divergence from upstream: ipaddress can't handle byte str
+    ip = ipaddress.ip_address(_to_unicode(ipname).rstrip())
+    return ip == host_ip
+
+
+def match_hostname(cert, hostname):
+    """Verify that *cert* (in decoded format as returned by
+    SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+    rules are followed, but IP addresses are not accepted for *hostname*.
+
+    CertificateError is raised on failure. On success, the function
+    returns nothing.
+    """
+    if not cert:
+        raise ValueError(
+            "empty or no certificate, match_hostname needs a "
+            "SSL socket or SSL context with either "
+            "CERT_OPTIONAL or CERT_REQUIRED"
+        )
+    try:
+        # Divergence from upstream: ipaddress can't handle byte str
+        host_ip = ipaddress.ip_address(_to_unicode(hostname))
+    except (UnicodeError, ValueError):
+        # ValueError: Not an IP address (common case)
+        # UnicodeError: Divergence from upstream: Have to deal with ipaddress not taking
+        # byte strings.  addresses should be all ascii, so we consider it not
+        # an ipaddress in this case
+        host_ip = None
+    except AttributeError:
+        # Divergence from upstream: Make ipaddress library optional
+        if ipaddress is None:
+            host_ip = None
+        else:  # Defensive
+            raise
+    dnsnames = []
+    san = cert.get("subjectAltName", ())
+    for key, value in san:
+        if key == "DNS":
+            if host_ip is None and _dnsname_match(value, hostname):
+                return
+            dnsnames.append(value)
+        elif key == "IP Address":
+            if host_ip is not None and _ipaddress_match(value, host_ip):
+                return
+            dnsnames.append(value)
+    if not dnsnames:
+        # The subject is only checked when there is no dNSName entry
+        # in subjectAltName
+        for sub in cert.get("subject", ()):
+            for key, value in sub:
+                # XXX according to RFC 2818, the most specific Common Name
+                # must be used.
+                if key == "commonName":
+                    if _dnsname_match(value, hostname):
+                        return
+                    dnsnames.append(value)
+    if len(dnsnames) > 1:
+        raise CertificateError(
+            "hostname %r "
+            "doesn't match either of %s" % (hostname, ", ".join(map(repr, dnsnames)))
+        )
+    elif len(dnsnames) == 1:
+        raise CertificateError("hostname %r doesn't match %r" % (hostname, dnsnames[0]))
+    else:
+        raise CertificateError(
+            "no appropriate commonName or subjectAltName fields were found"
+        )
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssltransport.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssltransport.py
new file mode 100644
index 0000000..4a7105d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/ssltransport.py
@@ -0,0 +1,221 @@
+import io
+import socket
+import ssl
+
+from ..exceptions import ProxySchemeUnsupported
+from ..packages import six
+
+SSL_BLOCKSIZE = 16384
+
+
+class SSLTransport:
+    """
+    The SSLTransport wraps an existing socket and establishes an SSL connection.
+
+    Contrary to Python's implementation of SSLSocket, it allows you to chain
+    multiple TLS connections together. It's particularly useful if you need to
+    implement TLS within TLS.
+
+    The class supports most of the socket API operations.
+    """
+
+    @staticmethod
+    def _validate_ssl_context_for_tls_in_tls(ssl_context):
+        """
+        Raises a ProxySchemeUnsupported if the provided ssl_context can't be used
+        for TLS in TLS.
+
+        The only requirement is that the ssl_context provides the 'wrap_bio'
+        methods.
+        """
+
+        if not hasattr(ssl_context, "wrap_bio"):
+            if six.PY2:
+                raise ProxySchemeUnsupported(
+                    "TLS in TLS requires SSLContext.wrap_bio() which isn't "
+                    "supported on Python 2"
+                )
+            else:
+                raise ProxySchemeUnsupported(
+                    "TLS in TLS requires SSLContext.wrap_bio() which isn't "
+                    "available on non-native SSLContext"
+                )
+
+    def __init__(
+        self, socket, ssl_context, server_hostname=None, suppress_ragged_eofs=True
+    ):
+        """
+        Create an SSLTransport around socket using the provided ssl_context.
+        """
+        self.incoming = ssl.MemoryBIO()
+        self.outgoing = ssl.MemoryBIO()
+
+        self.suppress_ragged_eofs = suppress_ragged_eofs
+        self.socket = socket
+
+        self.sslobj = ssl_context.wrap_bio(
+            self.incoming, self.outgoing, server_hostname=server_hostname
+        )
+
+        # Perform initial handshake.
+        self._ssl_io_loop(self.sslobj.do_handshake)
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *_):
+        self.close()
+
+    def fileno(self):
+        return self.socket.fileno()
+
+    def read(self, len=1024, buffer=None):
+        return self._wrap_ssl_read(len, buffer)
+
+    def recv(self, len=1024, flags=0):
+        if flags != 0:
+            raise ValueError("non-zero flags not allowed in calls to recv")
+        return self._wrap_ssl_read(len)
+
+    def recv_into(self, buffer, nbytes=None, flags=0):
+        if flags != 0:
+            raise ValueError("non-zero flags not allowed in calls to recv_into")
+        if buffer and (nbytes is None):
+            nbytes = len(buffer)
+        elif nbytes is None:
+            nbytes = 1024
+        return self.read(nbytes, buffer)
+
+    def sendall(self, data, flags=0):
+        if flags != 0:
+            raise ValueError("non-zero flags not allowed in calls to sendall")
+        count = 0
+        with memoryview(data) as view, view.cast("B") as byte_view:
+            amount = len(byte_view)
+            while count < amount:
+                v = self.send(byte_view[count:])
+                count += v
+
+    def send(self, data, flags=0):
+        if flags != 0:
+            raise ValueError("non-zero flags not allowed in calls to send")
+        response = self._ssl_io_loop(self.sslobj.write, data)
+        return response
+
+    def makefile(
+        self, mode="r", buffering=None, encoding=None, errors=None, newline=None
+    ):
+        """
+        Python's httpclient uses makefile and buffered io when reading HTTP
+        messages and we need to support it.
+
+        This is unfortunately a copy and paste of socket.py makefile with small
+        changes to point to the socket directly.
+        """
+        if not set(mode) <= {"r", "w", "b"}:
+            raise ValueError("invalid mode %r (only r, w, b allowed)" % (mode,))
+
+        writing = "w" in mode
+        reading = "r" in mode or not writing
+        assert reading or writing
+        binary = "b" in mode
+        rawmode = ""
+        if reading:
+            rawmode += "r"
+        if writing:
+            rawmode += "w"
+        raw = socket.SocketIO(self, rawmode)
+        self.socket._io_refs += 1
+        if buffering is None:
+            buffering = -1
+        if buffering < 0:
+            buffering = io.DEFAULT_BUFFER_SIZE
+        if buffering == 0:
+            if not binary:
+                raise ValueError("unbuffered streams must be binary")
+            return raw
+        if reading and writing:
+            buffer = io.BufferedRWPair(raw, raw, buffering)
+        elif reading:
+            buffer = io.BufferedReader(raw, buffering)
+        else:
+            assert writing
+            buffer = io.BufferedWriter(raw, buffering)
+        if binary:
+            return buffer
+        text = io.TextIOWrapper(buffer, encoding, errors, newline)
+        text.mode = mode
+        return text
+
+    def unwrap(self):
+        self._ssl_io_loop(self.sslobj.unwrap)
+
+    def close(self):
+        self.socket.close()
+
+    def getpeercert(self, binary_form=False):
+        return self.sslobj.getpeercert(binary_form)
+
+    def version(self):
+        return self.sslobj.version()
+
+    def cipher(self):
+        return self.sslobj.cipher()
+
+    def selected_alpn_protocol(self):
+        return self.sslobj.selected_alpn_protocol()
+
+    def selected_npn_protocol(self):
+        return self.sslobj.selected_npn_protocol()
+
+    def shared_ciphers(self):
+        return self.sslobj.shared_ciphers()
+
+    def compression(self):
+        return self.sslobj.compression()
+
+    def settimeout(self, value):
+        self.socket.settimeout(value)
+
+    def gettimeout(self):
+        return self.socket.gettimeout()
+
+    def _decref_socketios(self):
+        self.socket._decref_socketios()
+
+    def _wrap_ssl_read(self, len, buffer=None):
+        try:
+            return self._ssl_io_loop(self.sslobj.read, len, buffer)
+        except ssl.SSLError as e:
+            if e.errno == ssl.SSL_ERROR_EOF and self.suppress_ragged_eofs:
+                return 0  # eof, return 0.
+            else:
+                raise
+
+    def _ssl_io_loop(self, func, *args):
+        """Performs an I/O loop between incoming/outgoing and the socket."""
+        should_loop = True
+        ret = None
+
+        while should_loop:
+            errno = None
+            try:
+                ret = func(*args)
+            except ssl.SSLError as e:
+                if e.errno not in (ssl.SSL_ERROR_WANT_READ, ssl.SSL_ERROR_WANT_WRITE):
+                    # WANT_READ, and WANT_WRITE are expected, others are not.
+                    raise e
+                errno = e.errno
+
+            buf = self.outgoing.read()
+            self.socket.sendall(buf)
+
+            if errno is None:
+                should_loop = False
+            elif errno == ssl.SSL_ERROR_WANT_READ:
+                buf = self.socket.recv(SSL_BLOCKSIZE)
+                if buf:
+                    self.incoming.write(buf)
+                else:
+                    self.incoming.write_eof()
+        return ret
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/timeout.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/timeout.py
new file mode 100644
index 0000000..ff69593
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/timeout.py
@@ -0,0 +1,268 @@
+from __future__ import absolute_import
+
+import time
+
+# The default socket timeout, used by httplib to indicate that no timeout was
+# specified by the user
+from socket import _GLOBAL_DEFAULT_TIMEOUT
+
+from ..exceptions import TimeoutStateError
+
+# A sentinel value to indicate that no timeout was specified by the user in
+# urllib3
+_Default = object()
+
+
+# Use time.monotonic if available.
+current_time = getattr(time, "monotonic", time.time)
+
+
+class Timeout(object):
+    """Timeout configuration.
+
+    Timeouts can be defined as a default for a pool:
+
+    .. code-block:: python
+
+       timeout = Timeout(connect=2.0, read=7.0)
+       http = PoolManager(timeout=timeout)
+       response = http.request('GET', 'http://example.com/')
+
+    Or per-request (which overrides the default for the pool):
+
+    .. code-block:: python
+
+       response = http.request('GET', 'http://example.com/', timeout=Timeout(10))
+
+    Timeouts can be disabled by setting all the parameters to ``None``:
+
+    .. code-block:: python
+
+       no_timeout = Timeout(connect=None, read=None)
+       response = http.request('GET', 'http://example.com/, timeout=no_timeout)
+
+
+    :param total:
+        This combines the connect and read timeouts into one; the read timeout
+        will be set to the time leftover from the connect attempt. In the
+        event that both a connect timeout and a total are specified, or a read
+        timeout and a total are specified, the shorter timeout will be applied.
+
+        Defaults to None.
+
+    :type total: int, float, or None
+
+    :param connect:
+        The maximum amount of time (in seconds) to wait for a connection
+        attempt to a server to succeed. Omitting the parameter will default the
+        connect timeout to the system default, probably `the global default
+        timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout for connection attempts.
+
+    :type connect: int, float, or None
+
+    :param read:
+        The maximum amount of time (in seconds) to wait between consecutive
+        read operations for a response from the server. Omitting the parameter
+        will default the read timeout to the system default, probably `the
+        global default timeout in socket.py
+        <http://hg.python.org/cpython/file/603b4d593758/Lib/socket.py#l535>`_.
+        None will set an infinite timeout.
+
+    :type read: int, float, or None
+
+    .. note::
+
+        Many factors can affect the total amount of time for urllib3 to return
+        an HTTP response.
+
+        For example, Python's DNS resolver does not obey the timeout specified
+        on the socket. Other factors that can affect total request time include
+        high CPU load, high swap, the program running at a low priority level,
+        or other behaviors.
+
+        In addition, the read and total timeouts only measure the time between
+        read operations on the socket connecting the client and the server,
+        not the total amount of time for the request to return a complete
+        response. For most requests, the timeout is raised because the server
+        has not sent the first byte in the specified time. This is not always
+        the case; if a server streams one byte every fifteen seconds, a timeout
+        of 20 seconds will not trigger, even though the request will take
+        several minutes to complete.
+
+        If your goal is to cut off any request after a set amount of wall clock
+        time, consider having a second "watcher" thread to cut off a slow
+        request.
+    """
+
+    #: A sentinel object representing the default timeout value
+    DEFAULT_TIMEOUT = _GLOBAL_DEFAULT_TIMEOUT
+
+    def __init__(self, total=None, connect=_Default, read=_Default):
+        self._connect = self._validate_timeout(connect, "connect")
+        self._read = self._validate_timeout(read, "read")
+        self.total = self._validate_timeout(total, "total")
+        self._start_connect = None
+
+    def __repr__(self):
+        return "%s(connect=%r, read=%r, total=%r)" % (
+            type(self).__name__,
+            self._connect,
+            self._read,
+            self.total,
+        )
+
+    # __str__ provided for backwards compatibility
+    __str__ = __repr__
+
+    @classmethod
+    def _validate_timeout(cls, value, name):
+        """Check that a timeout attribute is valid.
+
+        :param value: The timeout value to validate
+        :param name: The name of the timeout attribute to validate. This is
+            used to specify in error messages.
+        :return: The validated and casted version of the given value.
+        :raises ValueError: If it is a numeric value less than or equal to
+            zero, or the type is not an integer, float, or None.
+        """
+        if value is _Default:
+            return cls.DEFAULT_TIMEOUT
+
+        if value is None or value is cls.DEFAULT_TIMEOUT:
+            return value
+
+        if isinstance(value, bool):
+            raise ValueError(
+                "Timeout cannot be a boolean value. It must "
+                "be an int, float or None."
+            )
+        try:
+            float(value)
+        except (TypeError, ValueError):
+            raise ValueError(
+                "Timeout value %s was %s, but it must be an "
+                "int, float or None." % (name, value)
+            )
+
+        try:
+            if value <= 0:
+                raise ValueError(
+                    "Attempted to set %s timeout to %s, but the "
+                    "timeout cannot be set to a value less "
+                    "than or equal to 0." % (name, value)
+                )
+        except TypeError:
+            # Python 3
+            raise ValueError(
+                "Timeout value %s was %s, but it must be an "
+                "int, float or None." % (name, value)
+            )
+
+        return value
+
+    @classmethod
+    def from_float(cls, timeout):
+        """Create a new Timeout from a legacy timeout value.
+
+        The timeout value used by httplib.py sets the same timeout on the
+        connect(), and recv() socket requests. This creates a :class:`Timeout`
+        object that sets the individual timeouts to the ``timeout`` value
+        passed to this function.
+
+        :param timeout: The legacy timeout value.
+        :type timeout: integer, float, sentinel default object, or None
+        :return: Timeout object
+        :rtype: :class:`Timeout`
+        """
+        return Timeout(read=timeout, connect=timeout)
+
+    def clone(self):
+        """Create a copy of the timeout object
+
+        Timeout properties are stored per-pool but each request needs a fresh
+        Timeout object to ensure each one has its own start/stop configured.
+
+        :return: a copy of the timeout object
+        :rtype: :class:`Timeout`
+        """
+        # We can't use copy.deepcopy because that will also create a new object
+        # for _GLOBAL_DEFAULT_TIMEOUT, which socket.py uses as a sentinel to
+        # detect the user default.
+        return Timeout(connect=self._connect, read=self._read, total=self.total)
+
+    def start_connect(self):
+        """Start the timeout clock, used during a connect() attempt
+
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to start a timer that has been started already.
+        """
+        if self._start_connect is not None:
+            raise TimeoutStateError("Timeout timer has already been started.")
+        self._start_connect = current_time()
+        return self._start_connect
+
+    def get_connect_duration(self):
+        """Gets the time elapsed since the call to :meth:`start_connect`.
+
+        :return: Elapsed time in seconds.
+        :rtype: float
+        :raises urllib3.exceptions.TimeoutStateError: if you attempt
+            to get duration for a timer that hasn't been started.
+        """
+        if self._start_connect is None:
+            raise TimeoutStateError(
+                "Can't get connect duration for timer that has not started."
+            )
+        return current_time() - self._start_connect
+
+    @property
+    def connect_timeout(self):
+        """Get the value to use when setting a connection timeout.
+
+        This will be a positive float or integer, the value None
+        (never timeout), or the default system timeout.
+
+        :return: Connect timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        """
+        if self.total is None:
+            return self._connect
+
+        if self._connect is None or self._connect is self.DEFAULT_TIMEOUT:
+            return self.total
+
+        return min(self._connect, self.total)
+
+    @property
+    def read_timeout(self):
+        """Get the value for the read timeout.
+
+        This assumes some time has elapsed in the connection timeout and
+        computes the read timeout appropriately.
+
+        If self.total is set, the read timeout is dependent on the amount of
+        time taken by the connect timeout. If the connection time has not been
+        established, a :exc:`~urllib3.exceptions.TimeoutStateError` will be
+        raised.
+
+        :return: Value to use for the read timeout.
+        :rtype: int, float, :attr:`Timeout.DEFAULT_TIMEOUT` or None
+        :raises urllib3.exceptions.TimeoutStateError: If :meth:`start_connect`
+            has not yet been called on this object.
+        """
+        if (
+            self.total is not None
+            and self.total is not self.DEFAULT_TIMEOUT
+            and self._read is not None
+            and self._read is not self.DEFAULT_TIMEOUT
+        ):
+            # In case the connect timeout has not yet been established.
+            if self._start_connect is None:
+                return self._read
+            return max(0, min(self.total - self.get_connect_duration(), self._read))
+        elif self.total is not None and self.total is not self.DEFAULT_TIMEOUT:
+            return max(0, self.total - self.get_connect_duration())
+        else:
+            return self._read
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/url.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/url.py
new file mode 100644
index 0000000..86bd8b4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/url.py
@@ -0,0 +1,435 @@
+from __future__ import absolute_import
+
+import re
+from collections import namedtuple
+
+from ..exceptions import LocationParseError
+from ..packages import six
+
+url_attrs = ["scheme", "auth", "host", "port", "path", "query", "fragment"]
+
+# We only want to normalize urls with an HTTP(S) scheme.
+# urllib3 infers URLs without a scheme (None) to be http.
+NORMALIZABLE_SCHEMES = ("http", "https", None)
+
+# Almost all of these patterns were derived from the
+# 'rfc3986' module: https://github.com/python-hyper/rfc3986
+PERCENT_RE = re.compile(r"%[a-fA-F0-9]{2}")
+SCHEME_RE = re.compile(r"^(?:[a-zA-Z][a-zA-Z0-9+-]*:|/)")
+URI_RE = re.compile(
+    r"^(?:([a-zA-Z][a-zA-Z0-9+.-]*):)?"
+    r"(?://([^\\/?#]*))?"
+    r"([^?#]*)"
+    r"(?:\?([^#]*))?"
+    r"(?:#(.*))?$",
+    re.UNICODE | re.DOTALL,
+)
+
+IPV4_PAT = r"(?:[0-9]{1,3}\.){3}[0-9]{1,3}"
+HEX_PAT = "[0-9A-Fa-f]{1,4}"
+LS32_PAT = "(?:{hex}:{hex}|{ipv4})".format(hex=HEX_PAT, ipv4=IPV4_PAT)
+_subs = {"hex": HEX_PAT, "ls32": LS32_PAT}
+_variations = [
+    #                            6( h16 ":" ) ls32
+    "(?:%(hex)s:){6}%(ls32)s",
+    #                       "::" 5( h16 ":" ) ls32
+    "::(?:%(hex)s:){5}%(ls32)s",
+    # [               h16 ] "::" 4( h16 ":" ) ls32
+    "(?:%(hex)s)?::(?:%(hex)s:){4}%(ls32)s",
+    # [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
+    "(?:(?:%(hex)s:)?%(hex)s)?::(?:%(hex)s:){3}%(ls32)s",
+    # [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
+    "(?:(?:%(hex)s:){0,2}%(hex)s)?::(?:%(hex)s:){2}%(ls32)s",
+    # [ *3( h16 ":" ) h16 ] "::"    h16 ":"   ls32
+    "(?:(?:%(hex)s:){0,3}%(hex)s)?::%(hex)s:%(ls32)s",
+    # [ *4( h16 ":" ) h16 ] "::"              ls32
+    "(?:(?:%(hex)s:){0,4}%(hex)s)?::%(ls32)s",
+    # [ *5( h16 ":" ) h16 ] "::"              h16
+    "(?:(?:%(hex)s:){0,5}%(hex)s)?::%(hex)s",
+    # [ *6( h16 ":" ) h16 ] "::"
+    "(?:(?:%(hex)s:){0,6}%(hex)s)?::",
+]
+
+UNRESERVED_PAT = r"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._!\-~"
+IPV6_PAT = "(?:" + "|".join([x % _subs for x in _variations]) + ")"
+ZONE_ID_PAT = "(?:%25|%)(?:[" + UNRESERVED_PAT + "]|%[a-fA-F0-9]{2})+"
+IPV6_ADDRZ_PAT = r"\[" + IPV6_PAT + r"(?:" + ZONE_ID_PAT + r")?\]"
+REG_NAME_PAT = r"(?:[^\[\]%:/?#]|%[a-fA-F0-9]{2})*"
+TARGET_RE = re.compile(r"^(/[^?#]*)(?:\?([^#]*))?(?:#.*)?$")
+
+IPV4_RE = re.compile("^" + IPV4_PAT + "$")
+IPV6_RE = re.compile("^" + IPV6_PAT + "$")
+IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT + "$")
+BRACELESS_IPV6_ADDRZ_RE = re.compile("^" + IPV6_ADDRZ_PAT[2:-2] + "$")
+ZONE_ID_RE = re.compile("(" + ZONE_ID_PAT + r")\]$")
+
+_HOST_PORT_PAT = ("^(%s|%s|%s)(?::([0-9]{0,5}))?$") % (
+    REG_NAME_PAT,
+    IPV4_PAT,
+    IPV6_ADDRZ_PAT,
+)
+_HOST_PORT_RE = re.compile(_HOST_PORT_PAT, re.UNICODE | re.DOTALL)
+
+UNRESERVED_CHARS = set(
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789._-~"
+)
+SUB_DELIM_CHARS = set("!$&'()*+,;=")
+USERINFO_CHARS = UNRESERVED_CHARS | SUB_DELIM_CHARS | {":"}
+PATH_CHARS = USERINFO_CHARS | {"@", "/"}
+QUERY_CHARS = FRAGMENT_CHARS = PATH_CHARS | {"?"}
+
+
+class Url(namedtuple("Url", url_attrs)):
+    """
+    Data structure for representing an HTTP URL. Used as a return value for
+    :func:`parse_url`. Both the scheme and host are normalized as they are
+    both case-insensitive according to RFC 3986.
+    """
+
+    __slots__ = ()
+
+    def __new__(
+        cls,
+        scheme=None,
+        auth=None,
+        host=None,
+        port=None,
+        path=None,
+        query=None,
+        fragment=None,
+    ):
+        if path and not path.startswith("/"):
+            path = "/" + path
+        if scheme is not None:
+            scheme = scheme.lower()
+        return super(Url, cls).__new__(
+            cls, scheme, auth, host, port, path, query, fragment
+        )
+
+    @property
+    def hostname(self):
+        """For backwards-compatibility with urlparse. We're nice like that."""
+        return self.host
+
+    @property
+    def request_uri(self):
+        """Absolute path including the query string."""
+        uri = self.path or "/"
+
+        if self.query is not None:
+            uri += "?" + self.query
+
+        return uri
+
+    @property
+    def netloc(self):
+        """Network location including host and port"""
+        if self.port:
+            return "%s:%d" % (self.host, self.port)
+        return self.host
+
+    @property
+    def url(self):
+        """
+        Convert self into a url
+
+        This function should more or less round-trip with :func:`.parse_url`. The
+        returned url may not be exactly the same as the url inputted to
+        :func:`.parse_url`, but it should be equivalent by the RFC (e.g., urls
+        with a blank port will have : removed).
+
+        Example: ::
+
+            >>> U = parse_url('http://google.com/mail/')
+            >>> U.url
+            'http://google.com/mail/'
+            >>> Url('http', 'username:password', 'host.com', 80,
+            ... '/path', 'query', 'fragment').url
+            'http://username:password@host.com:80/path?query#fragment'
+        """
+        scheme, auth, host, port, path, query, fragment = self
+        url = u""
+
+        # We use "is not None" we want things to happen with empty strings (or 0 port)
+        if scheme is not None:
+            url += scheme + u"://"
+        if auth is not None:
+            url += auth + u"@"
+        if host is not None:
+            url += host
+        if port is not None:
+            url += u":" + str(port)
+        if path is not None:
+            url += path
+        if query is not None:
+            url += u"?" + query
+        if fragment is not None:
+            url += u"#" + fragment
+
+        return url
+
+    def __str__(self):
+        return self.url
+
+
+def split_first(s, delims):
+    """
+    .. deprecated:: 1.25
+
+    Given a string and an iterable of delimiters, split on the first found
+    delimiter. Return two split parts and the matched delimiter.
+
+    If not found, then the first part is the full input string.
+
+    Example::
+
+        >>> split_first('foo/bar?baz', '?/=')
+        ('foo', 'bar?baz', '/')
+        >>> split_first('foo/bar?baz', '123')
+        ('foo/bar?baz', '', None)
+
+    Scales linearly with number of delims. Not ideal for large number of delims.
+    """
+    min_idx = None
+    min_delim = None
+    for d in delims:
+        idx = s.find(d)
+        if idx < 0:
+            continue
+
+        if min_idx is None or idx < min_idx:
+            min_idx = idx
+            min_delim = d
+
+    if min_idx is None or min_idx < 0:
+        return s, "", None
+
+    return s[:min_idx], s[min_idx + 1 :], min_delim
+
+
+def _encode_invalid_chars(component, allowed_chars, encoding="utf-8"):
+    """Percent-encodes a URI component without reapplying
+    onto an already percent-encoded component.
+    """
+    if component is None:
+        return component
+
+    component = six.ensure_text(component)
+
+    # Normalize existing percent-encoded bytes.
+    # Try to see if the component we're encoding is already percent-encoded
+    # so we can skip all '%' characters but still encode all others.
+    component, percent_encodings = PERCENT_RE.subn(
+        lambda match: match.group(0).upper(), component
+    )
+
+    uri_bytes = component.encode("utf-8", "surrogatepass")
+    is_percent_encoded = percent_encodings == uri_bytes.count(b"%")
+    encoded_component = bytearray()
+
+    for i in range(0, len(uri_bytes)):
+        # Will return a single character bytestring on both Python 2 & 3
+        byte = uri_bytes[i : i + 1]
+        byte_ord = ord(byte)
+        if (is_percent_encoded and byte == b"%") or (
+            byte_ord < 128 and byte.decode() in allowed_chars
+        ):
+            encoded_component += byte
+            continue
+        encoded_component.extend(b"%" + (hex(byte_ord)[2:].encode().zfill(2).upper()))
+
+    return encoded_component.decode(encoding)
+
+
+def _remove_path_dot_segments(path):
+    # See http://tools.ietf.org/html/rfc3986#section-5.2.4 for pseudo-code
+    segments = path.split("/")  # Turn the path into a list of segments
+    output = []  # Initialize the variable to use to store output
+
+    for segment in segments:
+        # '.' is the current directory, so ignore it, it is superfluous
+        if segment == ".":
+            continue
+        # Anything other than '..', should be appended to the output
+        elif segment != "..":
+            output.append(segment)
+        # In this case segment == '..', if we can, we should pop the last
+        # element
+        elif output:
+            output.pop()
+
+    # If the path starts with '/' and the output is empty or the first string
+    # is non-empty
+    if path.startswith("/") and (not output or output[0]):
+        output.insert(0, "")
+
+    # If the path starts with '/.' or '/..' ensure we add one more empty
+    # string to add a trailing '/'
+    if path.endswith(("/.", "/..")):
+        output.append("")
+
+    return "/".join(output)
+
+
+def _normalize_host(host, scheme):
+    if host:
+        if isinstance(host, six.binary_type):
+            host = six.ensure_str(host)
+
+        if scheme in NORMALIZABLE_SCHEMES:
+            is_ipv6 = IPV6_ADDRZ_RE.match(host)
+            if is_ipv6:
+                # IPv6 hosts of the form 'a::b%zone' are encoded in a URL as
+                # such per RFC 6874: 'a::b%25zone'. Unquote the ZoneID
+                # separator as necessary to return a valid RFC 4007 scoped IP.
+                match = ZONE_ID_RE.search(host)
+                if match:
+                    start, end = match.span(1)
+                    zone_id = host[start:end]
+
+                    if zone_id.startswith("%25") and zone_id != "%25":
+                        zone_id = zone_id[3:]
+                    else:
+                        zone_id = zone_id[1:]
+                    zone_id = "%" + _encode_invalid_chars(zone_id, UNRESERVED_CHARS)
+                    return host[:start].lower() + zone_id + host[end:]
+                else:
+                    return host.lower()
+            elif not IPV4_RE.match(host):
+                return six.ensure_str(
+                    b".".join([_idna_encode(label) for label in host.split(".")])
+                )
+    return host
+
+
+def _idna_encode(name):
+    if name and any([ord(x) > 128 for x in name]):
+        try:
+            from pip._vendor import idna
+        except ImportError:
+            six.raise_from(
+                LocationParseError("Unable to parse URL without the 'idna' module"),
+                None,
+            )
+        try:
+            return idna.encode(name.lower(), strict=True, std3_rules=True)
+        except idna.IDNAError:
+            six.raise_from(
+                LocationParseError(u"Name '%s' is not a valid IDNA label" % name), None
+            )
+    return name.lower().encode("ascii")
+
+
+def _encode_target(target):
+    """Percent-encodes a request target so that there are no invalid characters"""
+    path, query = TARGET_RE.match(target).groups()
+    target = _encode_invalid_chars(path, PATH_CHARS)
+    query = _encode_invalid_chars(query, QUERY_CHARS)
+    if query is not None:
+        target += "?" + query
+    return target
+
+
+def parse_url(url):
+    """
+    Given a url, return a parsed :class:`.Url` namedtuple. Best-effort is
+    performed to parse incomplete urls. Fields not provided will be None.
+    This parser is RFC 3986 and RFC 6874 compliant.
+
+    The parser logic and helper functions are based heavily on
+    work done in the ``rfc3986`` module.
+
+    :param str url: URL to parse into a :class:`.Url` namedtuple.
+
+    Partly backwards-compatible with :mod:`urlparse`.
+
+    Example::
+
+        >>> parse_url('http://google.com/mail/')
+        Url(scheme='http', host='google.com', port=None, path='/mail/', ...)
+        >>> parse_url('google.com:80')
+        Url(scheme=None, host='google.com', port=80, path=None, ...)
+        >>> parse_url('/foo?bar')
+        Url(scheme=None, host=None, port=None, path='/foo', query='bar', ...)
+    """
+    if not url:
+        # Empty
+        return Url()
+
+    source_url = url
+    if not SCHEME_RE.search(url):
+        url = "//" + url
+
+    try:
+        scheme, authority, path, query, fragment = URI_RE.match(url).groups()
+        normalize_uri = scheme is None or scheme.lower() in NORMALIZABLE_SCHEMES
+
+        if scheme:
+            scheme = scheme.lower()
+
+        if authority:
+            auth, _, host_port = authority.rpartition("@")
+            auth = auth or None
+            host, port = _HOST_PORT_RE.match(host_port).groups()
+            if auth and normalize_uri:
+                auth = _encode_invalid_chars(auth, USERINFO_CHARS)
+            if port == "":
+                port = None
+        else:
+            auth, host, port = None, None, None
+
+        if port is not None:
+            port = int(port)
+            if not (0 <= port <= 65535):
+                raise LocationParseError(url)
+
+        host = _normalize_host(host, scheme)
+
+        if normalize_uri and path:
+            path = _remove_path_dot_segments(path)
+            path = _encode_invalid_chars(path, PATH_CHARS)
+        if normalize_uri and query:
+            query = _encode_invalid_chars(query, QUERY_CHARS)
+        if normalize_uri and fragment:
+            fragment = _encode_invalid_chars(fragment, FRAGMENT_CHARS)
+
+    except (ValueError, AttributeError):
+        return six.raise_from(LocationParseError(source_url), None)
+
+    # For the sake of backwards compatibility we put empty
+    # string values for path if there are any defined values
+    # beyond the path in the URL.
+    # TODO: Remove this when we break backwards compatibility.
+    if not path:
+        if query is not None or fragment is not None:
+            path = ""
+        else:
+            path = None
+
+    # Ensure that each part of the URL is a `str` for
+    # backwards compatibility.
+    if isinstance(url, six.text_type):
+        ensure_func = six.ensure_text
+    else:
+        ensure_func = six.ensure_str
+
+    def ensure_type(x):
+        return x if x is None else ensure_func(x)
+
+    return Url(
+        scheme=ensure_type(scheme),
+        auth=ensure_type(auth),
+        host=ensure_type(host),
+        port=port,
+        path=ensure_type(path),
+        query=ensure_type(query),
+        fragment=ensure_type(fragment),
+    )
+
+
+def get_host(url):
+    """
+    Deprecated. Use :func:`parse_url` instead.
+    """
+    p = parse_url(url)
+    return p.scheme or "http", p.hostname, p.port
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/wait.py b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/wait.py
new file mode 100644
index 0000000..21b4590
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/urllib3/util/wait.py
@@ -0,0 +1,152 @@
+import errno
+import select
+import sys
+from functools import partial
+
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
+
+__all__ = ["NoWayToWaitForSocketError", "wait_for_read", "wait_for_write"]
+
+
+class NoWayToWaitForSocketError(Exception):
+    pass
+
+
+# How should we wait on sockets?
+#
+# There are two types of APIs you can use for waiting on sockets: the fancy
+# modern stateful APIs like epoll/kqueue, and the older stateless APIs like
+# select/poll. The stateful APIs are more efficient when you have a lots of
+# sockets to keep track of, because you can set them up once and then use them
+# lots of times. But we only ever want to wait on a single socket at a time
+# and don't want to keep track of state, so the stateless APIs are actually
+# more efficient. So we want to use select() or poll().
+#
+# Now, how do we choose between select() and poll()? On traditional Unixes,
+# select() has a strange calling convention that makes it slow, or fail
+# altogether, for high-numbered file descriptors. The point of poll() is to fix
+# that, so on Unixes, we prefer poll().
+#
+# On Windows, there is no poll() (or at least Python doesn't provide a wrapper
+# for it), but that's OK, because on Windows, select() doesn't have this
+# strange calling convention; plain select() works fine.
+#
+# So: on Windows we use select(), and everywhere else we use poll(). We also
+# fall back to select() in case poll() is somehow broken or missing.
+
+if sys.version_info >= (3, 5):
+    # Modern Python, that retries syscalls by default
+    def _retry_on_intr(fn, timeout):
+        return fn(timeout)
+
+else:
+    # Old and broken Pythons.
+    def _retry_on_intr(fn, timeout):
+        if timeout is None:
+            deadline = float("inf")
+        else:
+            deadline = monotonic() + timeout
+
+        while True:
+            try:
+                return fn(timeout)
+            # OSError for 3 <= pyver < 3.5, select.error for pyver <= 2.7
+            except (OSError, select.error) as e:
+                # 'e.args[0]' incantation works for both OSError and select.error
+                if e.args[0] != errno.EINTR:
+                    raise
+                else:
+                    timeout = deadline - monotonic()
+                    if timeout < 0:
+                        timeout = 0
+                    if timeout == float("inf"):
+                        timeout = None
+                    continue
+
+
+def select_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    rcheck = []
+    wcheck = []
+    if read:
+        rcheck.append(sock)
+    if write:
+        wcheck.append(sock)
+    # When doing a non-blocking connect, most systems signal success by
+    # marking the socket writable. Windows, though, signals success by marked
+    # it as "exceptional". We paper over the difference by checking the write
+    # sockets for both conditions. (The stdlib selectors module does the same
+    # thing.)
+    fn = partial(select.select, rcheck, wcheck, wcheck)
+    rready, wready, xready = _retry_on_intr(fn, timeout)
+    return bool(rready or wready or xready)
+
+
+def poll_wait_for_socket(sock, read=False, write=False, timeout=None):
+    if not read and not write:
+        raise RuntimeError("must specify at least one of read=True, write=True")
+    mask = 0
+    if read:
+        mask |= select.POLLIN
+    if write:
+        mask |= select.POLLOUT
+    poll_obj = select.poll()
+    poll_obj.register(sock, mask)
+
+    # For some reason, poll() takes timeout in milliseconds
+    def do_poll(t):
+        if t is not None:
+            t *= 1000
+        return poll_obj.poll(t)
+
+    return bool(_retry_on_intr(do_poll, timeout))
+
+
+def null_wait_for_socket(*args, **kwargs):
+    raise NoWayToWaitForSocketError("no select-equivalent available")
+
+
+def _have_working_poll():
+    # Apparently some systems have a select.poll that fails as soon as you try
+    # to use it, either due to strange configuration or broken monkeypatching
+    # from libraries like eventlet/greenlet.
+    try:
+        poll_obj = select.poll()
+        _retry_on_intr(poll_obj.poll, 0)
+    except (AttributeError, OSError):
+        return False
+    else:
+        return True
+
+
+def wait_for_socket(*args, **kwargs):
+    # We delay choosing which implementation to use until the first time we're
+    # called. We could do it at import time, but then we might make the wrong
+    # decision if someone goes wild with monkeypatching select.poll after
+    # we're imported.
+    global wait_for_socket
+    if _have_working_poll():
+        wait_for_socket = poll_wait_for_socket
+    elif hasattr(select, "select"):
+        wait_for_socket = select_wait_for_socket
+    else:  # Platform-specific: Appengine.
+        wait_for_socket = null_wait_for_socket
+    return wait_for_socket(*args, **kwargs)
+
+
+def wait_for_read(sock, timeout=None):
+    """Waits for reading to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, read=True, timeout=timeout)
+
+
+def wait_for_write(sock, timeout=None):
+    """Waits for writing to be available on a given socket.
+    Returns True if the socket is readable, or False if the timeout expired.
+    """
+    return wait_for_socket(sock, write=True, timeout=timeout)
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/vendor.txt b/venv/lib/python3.9/site-packages/pip/_vendor/vendor.txt
new file mode 100644
index 0000000..9e9d4c1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/vendor.txt
@@ -0,0 +1,23 @@
+CacheControl==0.12.11  # Make sure to update the license in pyproject.toml for this.
+colorama==0.4.5
+distlib==0.3.6
+distro==1.7.0
+msgpack==1.0.4
+packaging==21.3
+pep517==0.13.0
+platformdirs==2.5.2
+pyparsing==3.0.9
+requests==2.28.1
+    certifi==2022.09.24
+    chardet==5.0.0
+    idna==3.4
+    urllib3==1.26.12
+rich==12.5.1
+    pygments==2.13.0
+    typing_extensions==4.4.0
+resolvelib==0.8.1
+setuptools==44.0.0
+six==1.16.0
+tenacity==8.1.0
+tomli==2.0.1
+webencodings==0.5.1
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__init__.py b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__init__.py
new file mode 100644
index 0000000..d21d697
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__init__.py
@@ -0,0 +1,342 @@
+# coding: utf-8
+"""
+
+    webencodings
+    ~~~~~~~~~~~~
+
+    This is a Python implementation of the `WHATWG Encoding standard
+    <http://encoding.spec.whatwg.org/>`. See README for details.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+from .labels import LABELS
+
+
+VERSION = '0.5.1'
+
+
+# Some names in Encoding are not valid Python aliases. Remap these.
+PYTHON_NAMES = {
+    'iso-8859-8-i': 'iso-8859-8',
+    'x-mac-cyrillic': 'mac-cyrillic',
+    'macintosh': 'mac-roman',
+    'windows-874': 'cp874'}
+
+CACHE = {}
+
+
+def ascii_lower(string):
+    r"""Transform (only) ASCII letters to lower case: A-Z is mapped to a-z.
+
+    :param string: An Unicode string.
+    :returns: A new Unicode string.
+
+    This is used for `ASCII case-insensitive
+    <http://encoding.spec.whatwg.org/#ascii-case-insensitive>`_
+    matching of encoding labels.
+    The same matching is also used, among other things,
+    for `CSS keywords <http://dev.w3.org/csswg/css-values/#keywords>`_.
+
+    This is different from the :meth:`~py:str.lower` method of Unicode strings
+    which also affect non-ASCII characters,
+    sometimes mapping them into the ASCII range:
+
+        >>> keyword = u'Bac\N{KELVIN SIGN}ground'
+        >>> assert keyword.lower() == u'background'
+        >>> assert ascii_lower(keyword) != keyword.lower()
+        >>> assert ascii_lower(keyword) == u'bac\N{KELVIN SIGN}ground'
+
+    """
+    # This turns out to be faster than unicode.translate()
+    return string.encode('utf8').lower().decode('utf8')
+
+
+def lookup(label):
+    """
+    Look for an encoding by its label.
+    This is the spec’s `get an encoding
+    <http://encoding.spec.whatwg.org/#concept-encoding-get>`_ algorithm.
+    Supported labels are listed there.
+
+    :param label: A string.
+    :returns:
+        An :class:`Encoding` object, or :obj:`None` for an unknown label.
+
+    """
+    # Only strip ASCII whitespace: U+0009, U+000A, U+000C, U+000D, and U+0020.
+    label = ascii_lower(label.strip('\t\n\f\r '))
+    name = LABELS.get(label)
+    if name is None:
+        return None
+    encoding = CACHE.get(name)
+    if encoding is None:
+        if name == 'x-user-defined':
+            from .x_user_defined import codec_info
+        else:
+            python_name = PYTHON_NAMES.get(name, name)
+            # Any python_name value that gets to here should be valid.
+            codec_info = codecs.lookup(python_name)
+        encoding = Encoding(name, codec_info)
+        CACHE[name] = encoding
+    return encoding
+
+
+def _get_encoding(encoding_or_label):
+    """
+    Accept either an encoding object or label.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :returns: An :class:`Encoding` object.
+    :raises: :exc:`~exceptions.LookupError` for an unknown label.
+
+    """
+    if hasattr(encoding_or_label, 'codec_info'):
+        return encoding_or_label
+
+    encoding = lookup(encoding_or_label)
+    if encoding is None:
+        raise LookupError('Unknown encoding label: %r' % encoding_or_label)
+    return encoding
+
+
+class Encoding(object):
+    """Reresents a character encoding such as UTF-8,
+    that can be used for decoding or encoding.
+
+    .. attribute:: name
+
+        Canonical name of the encoding
+
+    .. attribute:: codec_info
+
+        The actual implementation of the encoding,
+        a stdlib :class:`~codecs.CodecInfo` object.
+        See :func:`codecs.register`.
+
+    """
+    def __init__(self, name, codec_info):
+        self.name = name
+        self.codec_info = codec_info
+
+    def __repr__(self):
+        return '<Encoding %s>' % self.name
+
+
+#: The UTF-8 encoding. Should be used for new content and formats.
+UTF8 = lookup('utf-8')
+
+_UTF16LE = lookup('utf-16le')
+_UTF16BE = lookup('utf-16be')
+
+
+def decode(input, fallback_encoding, errors='replace'):
+    """
+    Decode a single string.
+
+    :param input: A byte string
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return:
+        A ``(output, encoding)`` tuple of an Unicode string
+        and an :obj:`Encoding`.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    fallback_encoding = _get_encoding(fallback_encoding)
+    bom_encoding, input = _detect_bom(input)
+    encoding = bom_encoding or fallback_encoding
+    return encoding.codec_info.decode(input, errors)[0], encoding
+
+
+def _detect_bom(input):
+    """Return (bom_encoding, input), with any BOM removed from the input."""
+    if input.startswith(b'\xFF\xFE'):
+        return _UTF16LE, input[2:]
+    if input.startswith(b'\xFE\xFF'):
+        return _UTF16BE, input[2:]
+    if input.startswith(b'\xEF\xBB\xBF'):
+        return UTF8, input[3:]
+    return None, input
+
+
+def encode(input, encoding=UTF8, errors='strict'):
+    """
+    Encode a single string.
+
+    :param input: An Unicode string.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :return: A byte string.
+
+    """
+    return _get_encoding(encoding).codec_info.encode(input, errors)[0]
+
+
+def iter_decode(input, fallback_encoding, errors='replace'):
+    """
+    "Pull"-based decoder.
+
+    :param input:
+        An iterable of byte strings.
+
+        The input is first consumed just enough to determine the encoding
+        based on the precense of a BOM,
+        then consumed on demand when the return value is.
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns:
+        An ``(output, encoding)`` tuple.
+        :obj:`output` is an iterable of Unicode strings,
+        :obj:`encoding` is the :obj:`Encoding` that is being used.
+
+    """
+
+    decoder = IncrementalDecoder(fallback_encoding, errors)
+    generator = _iter_decode_generator(input, decoder)
+    encoding = next(generator)
+    return generator, encoding
+
+
+def _iter_decode_generator(input, decoder):
+    """Return a generator that first yields the :obj:`Encoding`,
+    then yields output chukns as Unicode strings.
+
+    """
+    decode = decoder.decode
+    input = iter(input)
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            assert decoder.encoding is not None
+            yield decoder.encoding
+            yield output
+            break
+    else:
+        # Input exhausted without determining the encoding
+        output = decode(b'', final=True)
+        assert decoder.encoding is not None
+        yield decoder.encoding
+        if output:
+            yield output
+        return
+
+    for chunck in input:
+        output = decode(chunck)
+        if output:
+            yield output
+    output = decode(b'', final=True)
+    if output:
+        yield output
+
+
+def iter_encode(input, encoding=UTF8, errors='strict'):
+    """
+    “Pull”-based encoder.
+
+    :param input: An iterable of Unicode strings.
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+    :returns: An iterable of byte strings.
+
+    """
+    # Fail early if `encoding` is an invalid label.
+    encode = IncrementalEncoder(encoding, errors).encode
+    return _iter_encode_generator(input, encode)
+
+
+def _iter_encode_generator(input, encode):
+    for chunck in input:
+        output = encode(chunck)
+        if output:
+            yield output
+    output = encode('', final=True)
+    if output:
+        yield output
+
+
+class IncrementalDecoder(object):
+    """
+    “Push”-based decoder.
+
+    :param fallback_encoding:
+        An :class:`Encoding` object or a label string.
+        The encoding to use if :obj:`input` does note have a BOM.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    """
+    def __init__(self, fallback_encoding, errors='replace'):
+        # Fail early if `encoding` is an invalid label.
+        self._fallback_encoding = _get_encoding(fallback_encoding)
+        self._errors = errors
+        self._buffer = b''
+        self._decoder = None
+        #: The actual :class:`Encoding` that is being used,
+        #: or :obj:`None` if that is not determined yet.
+        #: (Ie. if there is not enough input yet to determine
+        #: if there is a BOM.)
+        self.encoding = None  # Not known yet.
+
+    def decode(self, input, final=False):
+        """Decode one chunk of the input.
+
+        :param input: A byte string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: An Unicode string.
+
+        """
+        decoder = self._decoder
+        if decoder is not None:
+            return decoder(input, final)
+
+        input = self._buffer + input
+        encoding, input = _detect_bom(input)
+        if encoding is None:
+            if len(input) < 3 and not final:  # Not enough data yet.
+                self._buffer = input
+                return ''
+            else:  # No BOM
+                encoding = self._fallback_encoding
+        decoder = encoding.codec_info.incrementaldecoder(self._errors).decode
+        self._decoder = decoder
+        self.encoding = encoding
+        return decoder(input, final)
+
+
+class IncrementalEncoder(object):
+    """
+    “Push”-based encoder.
+
+    :param encoding: An :class:`Encoding` object or a label string.
+    :param errors: Type of error handling. See :func:`codecs.register`.
+    :raises: :exc:`~exceptions.LookupError` for an unknown encoding label.
+
+    .. method:: encode(input, final=False)
+
+        :param input: An Unicode string.
+        :param final:
+            Indicate that no more input is available.
+            Must be :obj:`True` if this is the last call.
+        :returns: A byte string.
+
+    """
+    def __init__(self, encoding=UTF8, errors='strict'):
+        encoding = _get_encoding(encoding)
+        self.encode = encoding.codec_info.incrementalencoder(errors).encode
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..f9893c5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-39.pyc
new file mode 100644
index 0000000..91efb49
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/labels.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-39.pyc
new file mode 100644
index 0000000..1f47358
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/mklabels.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-39.pyc
new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/tests.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-39.pyc b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-39.pyc
new file mode 100644
index 0000000..93fce5f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/__pycache__/x_user_defined.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/labels.py b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/labels.py
new file mode 100644
index 0000000..29cbf91
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/labels.py
@@ -0,0 +1,231 @@
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+    'unicode-1-1-utf-8':   'utf-8',
+    'utf-8':               'utf-8',
+    'utf8':                'utf-8',
+    '866':                 'ibm866',
+    'cp866':               'ibm866',
+    'csibm866':            'ibm866',
+    'ibm866':              'ibm866',
+    'csisolatin2':         'iso-8859-2',
+    'iso-8859-2':          'iso-8859-2',
+    'iso-ir-101':          'iso-8859-2',
+    'iso8859-2':           'iso-8859-2',
+    'iso88592':            'iso-8859-2',
+    'iso_8859-2':          'iso-8859-2',
+    'iso_8859-2:1987':     'iso-8859-2',
+    'l2':                  'iso-8859-2',
+    'latin2':              'iso-8859-2',
+    'csisolatin3':         'iso-8859-3',
+    'iso-8859-3':          'iso-8859-3',
+    'iso-ir-109':          'iso-8859-3',
+    'iso8859-3':           'iso-8859-3',
+    'iso88593':            'iso-8859-3',
+    'iso_8859-3':          'iso-8859-3',
+    'iso_8859-3:1988':     'iso-8859-3',
+    'l3':                  'iso-8859-3',
+    'latin3':              'iso-8859-3',
+    'csisolatin4':         'iso-8859-4',
+    'iso-8859-4':          'iso-8859-4',
+    'iso-ir-110':          'iso-8859-4',
+    'iso8859-4':           'iso-8859-4',
+    'iso88594':            'iso-8859-4',
+    'iso_8859-4':          'iso-8859-4',
+    'iso_8859-4:1988':     'iso-8859-4',
+    'l4':                  'iso-8859-4',
+    'latin4':              'iso-8859-4',
+    'csisolatincyrillic':  'iso-8859-5',
+    'cyrillic':            'iso-8859-5',
+    'iso-8859-5':          'iso-8859-5',
+    'iso-ir-144':          'iso-8859-5',
+    'iso8859-5':           'iso-8859-5',
+    'iso88595':            'iso-8859-5',
+    'iso_8859-5':          'iso-8859-5',
+    'iso_8859-5:1988':     'iso-8859-5',
+    'arabic':              'iso-8859-6',
+    'asmo-708':            'iso-8859-6',
+    'csiso88596e':         'iso-8859-6',
+    'csiso88596i':         'iso-8859-6',
+    'csisolatinarabic':    'iso-8859-6',
+    'ecma-114':            'iso-8859-6',
+    'iso-8859-6':          'iso-8859-6',
+    'iso-8859-6-e':        'iso-8859-6',
+    'iso-8859-6-i':        'iso-8859-6',
+    'iso-ir-127':          'iso-8859-6',
+    'iso8859-6':           'iso-8859-6',
+    'iso88596':            'iso-8859-6',
+    'iso_8859-6':          'iso-8859-6',
+    'iso_8859-6:1987':     'iso-8859-6',
+    'csisolatingreek':     'iso-8859-7',
+    'ecma-118':            'iso-8859-7',
+    'elot_928':            'iso-8859-7',
+    'greek':               'iso-8859-7',
+    'greek8':              'iso-8859-7',
+    'iso-8859-7':          'iso-8859-7',
+    'iso-ir-126':          'iso-8859-7',
+    'iso8859-7':           'iso-8859-7',
+    'iso88597':            'iso-8859-7',
+    'iso_8859-7':          'iso-8859-7',
+    'iso_8859-7:1987':     'iso-8859-7',
+    'sun_eu_greek':        'iso-8859-7',
+    'csiso88598e':         'iso-8859-8',
+    'csisolatinhebrew':    'iso-8859-8',
+    'hebrew':              'iso-8859-8',
+    'iso-8859-8':          'iso-8859-8',
+    'iso-8859-8-e':        'iso-8859-8',
+    'iso-ir-138':          'iso-8859-8',
+    'iso8859-8':           'iso-8859-8',
+    'iso88598':            'iso-8859-8',
+    'iso_8859-8':          'iso-8859-8',
+    'iso_8859-8:1988':     'iso-8859-8',
+    'visual':              'iso-8859-8',
+    'csiso88598i':         'iso-8859-8-i',
+    'iso-8859-8-i':        'iso-8859-8-i',
+    'logical':             'iso-8859-8-i',
+    'csisolatin6':         'iso-8859-10',
+    'iso-8859-10':         'iso-8859-10',
+    'iso-ir-157':          'iso-8859-10',
+    'iso8859-10':          'iso-8859-10',
+    'iso885910':           'iso-8859-10',
+    'l6':                  'iso-8859-10',
+    'latin6':              'iso-8859-10',
+    'iso-8859-13':         'iso-8859-13',
+    'iso8859-13':          'iso-8859-13',
+    'iso885913':           'iso-8859-13',
+    'iso-8859-14':         'iso-8859-14',
+    'iso8859-14':          'iso-8859-14',
+    'iso885914':           'iso-8859-14',
+    'csisolatin9':         'iso-8859-15',
+    'iso-8859-15':         'iso-8859-15',
+    'iso8859-15':          'iso-8859-15',
+    'iso885915':           'iso-8859-15',
+    'iso_8859-15':         'iso-8859-15',
+    'l9':                  'iso-8859-15',
+    'iso-8859-16':         'iso-8859-16',
+    'cskoi8r':             'koi8-r',
+    'koi':                 'koi8-r',
+    'koi8':                'koi8-r',
+    'koi8-r':              'koi8-r',
+    'koi8_r':              'koi8-r',
+    'koi8-u':              'koi8-u',
+    'csmacintosh':         'macintosh',
+    'mac':                 'macintosh',
+    'macintosh':           'macintosh',
+    'x-mac-roman':         'macintosh',
+    'dos-874':             'windows-874',
+    'iso-8859-11':         'windows-874',
+    'iso8859-11':          'windows-874',
+    'iso885911':           'windows-874',
+    'tis-620':             'windows-874',
+    'windows-874':         'windows-874',
+    'cp1250':              'windows-1250',
+    'windows-1250':        'windows-1250',
+    'x-cp1250':            'windows-1250',
+    'cp1251':              'windows-1251',
+    'windows-1251':        'windows-1251',
+    'x-cp1251':            'windows-1251',
+    'ansi_x3.4-1968':      'windows-1252',
+    'ascii':               'windows-1252',
+    'cp1252':              'windows-1252',
+    'cp819':               'windows-1252',
+    'csisolatin1':         'windows-1252',
+    'ibm819':              'windows-1252',
+    'iso-8859-1':          'windows-1252',
+    'iso-ir-100':          'windows-1252',
+    'iso8859-1':           'windows-1252',
+    'iso88591':            'windows-1252',
+    'iso_8859-1':          'windows-1252',
+    'iso_8859-1:1987':     'windows-1252',
+    'l1':                  'windows-1252',
+    'latin1':              'windows-1252',
+    'us-ascii':            'windows-1252',
+    'windows-1252':        'windows-1252',
+    'x-cp1252':            'windows-1252',
+    'cp1253':              'windows-1253',
+    'windows-1253':        'windows-1253',
+    'x-cp1253':            'windows-1253',
+    'cp1254':              'windows-1254',
+    'csisolatin5':         'windows-1254',
+    'iso-8859-9':          'windows-1254',
+    'iso-ir-148':          'windows-1254',
+    'iso8859-9':           'windows-1254',
+    'iso88599':            'windows-1254',
+    'iso_8859-9':          'windows-1254',
+    'iso_8859-9:1989':     'windows-1254',
+    'l5':                  'windows-1254',
+    'latin5':              'windows-1254',
+    'windows-1254':        'windows-1254',
+    'x-cp1254':            'windows-1254',
+    'cp1255':              'windows-1255',
+    'windows-1255':        'windows-1255',
+    'x-cp1255':            'windows-1255',
+    'cp1256':              'windows-1256',
+    'windows-1256':        'windows-1256',
+    'x-cp1256':            'windows-1256',
+    'cp1257':              'windows-1257',
+    'windows-1257':        'windows-1257',
+    'x-cp1257':            'windows-1257',
+    'cp1258':              'windows-1258',
+    'windows-1258':        'windows-1258',
+    'x-cp1258':            'windows-1258',
+    'x-mac-cyrillic':      'x-mac-cyrillic',
+    'x-mac-ukrainian':     'x-mac-cyrillic',
+    'chinese':             'gbk',
+    'csgb2312':            'gbk',
+    'csiso58gb231280':     'gbk',
+    'gb2312':              'gbk',
+    'gb_2312':             'gbk',
+    'gb_2312-80':          'gbk',
+    'gbk':                 'gbk',
+    'iso-ir-58':           'gbk',
+    'x-gbk':               'gbk',
+    'gb18030':             'gb18030',
+    'hz-gb-2312':          'hz-gb-2312',
+    'big5':                'big5',
+    'big5-hkscs':          'big5',
+    'cn-big5':             'big5',
+    'csbig5':              'big5',
+    'x-x-big5':            'big5',
+    'cseucpkdfmtjapanese': 'euc-jp',
+    'euc-jp':              'euc-jp',
+    'x-euc-jp':            'euc-jp',
+    'csiso2022jp':         'iso-2022-jp',
+    'iso-2022-jp':         'iso-2022-jp',
+    'csshiftjis':          'shift_jis',
+    'ms_kanji':            'shift_jis',
+    'shift-jis':           'shift_jis',
+    'shift_jis':           'shift_jis',
+    'sjis':                'shift_jis',
+    'windows-31j':         'shift_jis',
+    'x-sjis':              'shift_jis',
+    'cseuckr':             'euc-kr',
+    'csksc56011987':       'euc-kr',
+    'euc-kr':              'euc-kr',
+    'iso-ir-149':          'euc-kr',
+    'korean':              'euc-kr',
+    'ks_c_5601-1987':      'euc-kr',
+    'ks_c_5601-1989':      'euc-kr',
+    'ksc5601':             'euc-kr',
+    'ksc_5601':            'euc-kr',
+    'windows-949':         'euc-kr',
+    'csiso2022kr':         'iso-2022-kr',
+    'iso-2022-kr':         'iso-2022-kr',
+    'utf-16be':            'utf-16be',
+    'utf-16':              'utf-16le',
+    'utf-16le':            'utf-16le',
+    'x-user-defined':      'x-user-defined',
+}
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/mklabels.py b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/mklabels.py
new file mode 100644
index 0000000..295dc92
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/mklabels.py
@@ -0,0 +1,59 @@
+"""
+
+    webencodings.mklabels
+    ~~~~~~~~~~~~~~~~~~~~~
+
+    Regenarate the webencodings.labels module.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+import json
+try:
+    from urllib import urlopen
+except ImportError:
+    from urllib.request import urlopen
+
+
+def assert_lower(string):
+    assert string == string.lower()
+    return string
+
+
+def generate(url):
+    parts = ['''\
+"""
+
+    webencodings.labels
+    ~~~~~~~~~~~~~~~~~~~
+
+    Map encoding labels to their name.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+# XXX Do not edit!
+# This file is automatically generated by mklabels.py
+
+LABELS = {
+''']
+    labels = [
+        (repr(assert_lower(label)).lstrip('u'),
+         repr(encoding['name']).lstrip('u'))
+        for category in json.loads(urlopen(url).read().decode('ascii'))
+        for encoding in category['encodings']
+        for label in encoding['labels']]
+    max_len = max(len(label) for label, name in labels)
+    parts.extend(
+        '    %s:%s %s,\n' % (label, ' ' * (max_len - len(label)), name)
+        for label, name in labels)
+    parts.append('}')
+    return ''.join(parts)
+
+
+if __name__ == '__main__':
+    print(generate('http://encoding.spec.whatwg.org/encodings.json'))
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/tests.py b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/tests.py
new file mode 100644
index 0000000..e12c10d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/tests.py
@@ -0,0 +1,153 @@
+# coding: utf-8
+"""
+
+    webencodings.tests
+    ~~~~~~~~~~~~~~~~~~
+
+    A basic test suite for Encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+from . import (lookup, LABELS, decode, encode, iter_decode, iter_encode,
+               IncrementalDecoder, IncrementalEncoder, UTF8)
+
+
+def assert_raises(exception, function, *args, **kwargs):
+    try:
+        function(*args, **kwargs)
+    except exception:
+        return
+    else:  # pragma: no cover
+        raise AssertionError('Did not raise %s.' % exception)
+
+
+def test_labels():
+    assert lookup('utf-8').name == 'utf-8'
+    assert lookup('Utf-8').name == 'utf-8'
+    assert lookup('UTF-8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8').name == 'utf-8'
+    assert lookup('utf8 ').name == 'utf-8'
+    assert lookup(' \r\nutf8\t').name == 'utf-8'
+    assert lookup('u8') is None  # Python label.
+    assert lookup('utf-8 ') is None  # Non-ASCII white space.
+
+    assert lookup('US-ASCII').name == 'windows-1252'
+    assert lookup('iso-8859-1').name == 'windows-1252'
+    assert lookup('latin1').name == 'windows-1252'
+    assert lookup('LATIN1').name == 'windows-1252'
+    assert lookup('latin-1') is None
+    assert lookup('LATİN1') is None  # ASCII-only case insensitivity.
+
+
+def test_all_labels():
+    for label in LABELS:
+        assert decode(b'', label) == ('', lookup(label))
+        assert encode('', label) == b''
+        for repeat in [0, 1, 12]:
+            output, _ = iter_decode([b''] * repeat, label)
+            assert list(output) == []
+            assert list(iter_encode([''] * repeat, label)) == []
+        decoder = IncrementalDecoder(label)
+        assert decoder.decode(b'') == ''
+        assert decoder.decode(b'', final=True) == ''
+        encoder = IncrementalEncoder(label)
+        assert encoder.encode('') == b''
+        assert encoder.encode('', final=True) == b''
+    # All encoding names are valid labels too:
+    for name in set(LABELS.values()):
+        assert lookup(name).name == name
+
+
+def test_invalid_label():
+    assert_raises(LookupError, decode, b'\xEF\xBB\xBF\xc3\xa9', 'invalid')
+    assert_raises(LookupError, encode, 'é', 'invalid')
+    assert_raises(LookupError, iter_decode, [], 'invalid')
+    assert_raises(LookupError, iter_encode, [], 'invalid')
+    assert_raises(LookupError, IncrementalDecoder, 'invalid')
+    assert_raises(LookupError, IncrementalEncoder, 'invalid')
+
+
+def test_decode():
+    assert decode(b'\x80', 'latin1') == ('€', lookup('latin1'))
+    assert decode(b'\x80', lookup('latin1')) == ('€', lookup('latin1'))
+    assert decode(b'\xc3\xa9', 'utf8') == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', UTF8) == ('é', lookup('utf8'))
+    assert decode(b'\xc3\xa9', 'ascii') == ('Ã©', lookup('ascii'))
+    assert decode(b'\xEF\xBB\xBF\xc3\xa9', 'ascii') == ('é', lookup('utf8'))  # UTF-8 with BOM
+
+    assert decode(b'\xFE\xFF\x00\xe9', 'ascii') == ('é', lookup('utf-16be'))  # UTF-16-BE with BOM
+    assert decode(b'\xFF\xFE\xe9\x00', 'ascii') == ('é', lookup('utf-16le'))  # UTF-16-LE with BOM
+    assert decode(b'\xFE\xFF\xe9\x00', 'ascii') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\xFF\xFE\x00\xe9', 'ascii') == ('\ue900', lookup('utf-16le'))
+
+    assert decode(b'\x00\xe9', 'UTF-16BE') == ('é', lookup('utf-16be'))
+    assert decode(b'\xe9\x00', 'UTF-16LE') == ('é', lookup('utf-16le'))
+    assert decode(b'\xe9\x00', 'UTF-16') == ('é', lookup('utf-16le'))
+
+    assert decode(b'\xe9\x00', 'UTF-16BE') == ('\ue900', lookup('utf-16be'))
+    assert decode(b'\x00\xe9', 'UTF-16LE') == ('\ue900', lookup('utf-16le'))
+    assert decode(b'\x00\xe9', 'UTF-16') == ('\ue900', lookup('utf-16le'))
+
+
+def test_encode():
+    assert encode('é', 'latin1') == b'\xe9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf8') == b'\xc3\xa9'
+    assert encode('é', 'utf-16') == b'\xe9\x00'
+    assert encode('é', 'utf-16le') == b'\xe9\x00'
+    assert encode('é', 'utf-16be') == b'\x00\xe9'
+
+
+def test_iter_decode():
+    def iter_decode_to_string(input, fallback_encoding):
+        output, _encoding = iter_decode(input, fallback_encoding)
+        return ''.join(output)
+    assert iter_decode_to_string([], 'latin1') == ''
+    assert iter_decode_to_string([b''], 'latin1') == ''
+    assert iter_decode_to_string([b'\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'hello'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'he', b'llo'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'hell', b'o'], 'latin1') == 'hello'
+    assert iter_decode_to_string([b'\xc3\xa9'], 'latin1') == 'Ã©'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF\xc3\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'\xEF\xBB\xBF', b'a', b'\xc3'], 'latin1') == 'a\uFFFD'
+    assert iter_decode_to_string([
+        b'', b'\xEF', b'', b'', b'\xBB\xBF\xc3', b'\xa9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xEF\xBB\xBF'], 'latin1') == ''
+    assert iter_decode_to_string([b'\xEF\xBB'], 'latin1') == 'ï»'
+    assert iter_decode_to_string([b'\xFE\xFF\x00\xe9'], 'latin1') == 'é'
+    assert iter_decode_to_string([b'\xFF\xFE\xe9\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'\xFF', b'', b'', b'\xFE\xe9', b'\x00'], 'latin1') == 'é'
+    assert iter_decode_to_string([
+        b'', b'h\xe9', b'llo'], 'x-user-defined') == 'h\uF7E9llo'
+
+
+def test_iter_encode():
+    assert b''.join(iter_encode([], 'latin1')) == b''
+    assert b''.join(iter_encode([''], 'latin1')) == b''
+    assert b''.join(iter_encode(['é'], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'latin1')) == b'\xe9'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16le')) == b'\xe9\x00'
+    assert b''.join(iter_encode(['', 'é', '', ''], 'utf-16be')) == b'\x00\xe9'
+    assert b''.join(iter_encode([
+        '', 'h\uF7E9', '', 'llo'], 'x-user-defined')) == b'h\xe9llo'
+
+
+def test_x_user_defined():
+    encoded = b'2,\x0c\x0b\x1aO\xd9#\xcb\x0f\xc9\xbbt\xcf\xa8\xca'
+    decoded = '2,\x0c\x0b\x1aO\uf7d9#\uf7cb\x0f\uf7c9\uf7bbt\uf7cf\uf7a8\uf7ca'
+    encoded = b'aa'
+    decoded = 'aa'
+    assert decode(encoded, 'x-user-defined') == (decoded, lookup('x-user-defined'))
+    assert encode(decoded, 'x-user-defined') == encoded
diff --git a/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/x_user_defined.py b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/x_user_defined.py
new file mode 100644
index 0000000..d16e326
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/_vendor/webencodings/x_user_defined.py
@@ -0,0 +1,325 @@
+# coding: utf-8
+"""
+
+    webencodings.x_user_defined
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    An implementation of the x-user-defined encoding.
+
+    :copyright: Copyright 2012 by Simon Sapin
+    :license: BSD, see LICENSE for details.
+
+"""
+
+from __future__ import unicode_literals
+
+import codecs
+
+
+### Codec APIs
+
+class Codec(codecs.Codec):
+
+    def encode(self, input, errors='strict'):
+        return codecs.charmap_encode(input, errors, encoding_table)
+
+    def decode(self, input, errors='strict'):
+        return codecs.charmap_decode(input, errors, decoding_table)
+
+
+class IncrementalEncoder(codecs.IncrementalEncoder):
+    def encode(self, input, final=False):
+        return codecs.charmap_encode(input, self.errors, encoding_table)[0]
+
+
+class IncrementalDecoder(codecs.IncrementalDecoder):
+    def decode(self, input, final=False):
+        return codecs.charmap_decode(input, self.errors, decoding_table)[0]
+
+
+class StreamWriter(Codec, codecs.StreamWriter):
+    pass
+
+
+class StreamReader(Codec, codecs.StreamReader):
+    pass
+
+
+### encodings module API
+
+codec_info = codecs.CodecInfo(
+    name='x-user-defined',
+    encode=Codec().encode,
+    decode=Codec().decode,
+    incrementalencoder=IncrementalEncoder,
+    incrementaldecoder=IncrementalDecoder,
+    streamreader=StreamReader,
+    streamwriter=StreamWriter,
+)
+
+
+### Decoding Table
+
+# Python 3:
+# for c in range(256): print('    %r' % chr(c if c < 128 else c + 0xF700))
+decoding_table = (
+    '\x00'
+    '\x01'
+    '\x02'
+    '\x03'
+    '\x04'
+    '\x05'
+    '\x06'
+    '\x07'
+    '\x08'
+    '\t'
+    '\n'
+    '\x0b'
+    '\x0c'
+    '\r'
+    '\x0e'
+    '\x0f'
+    '\x10'
+    '\x11'
+    '\x12'
+    '\x13'
+    '\x14'
+    '\x15'
+    '\x16'
+    '\x17'
+    '\x18'
+    '\x19'
+    '\x1a'
+    '\x1b'
+    '\x1c'
+    '\x1d'
+    '\x1e'
+    '\x1f'
+    ' '
+    '!'
+    '"'
+    '#'
+    '$'
+    '%'
+    '&'
+    "'"
+    '('
+    ')'
+    '*'
+    '+'
+    ','
+    '-'
+    '.'
+    '/'
+    '0'
+    '1'
+    '2'
+    '3'
+    '4'
+    '5'
+    '6'
+    '7'
+    '8'
+    '9'
+    ':'
+    ';'
+    '<'
+    '='
+    '>'
+    '?'
+    '@'
+    'A'
+    'B'
+    'C'
+    'D'
+    'E'
+    'F'
+    'G'
+    'H'
+    'I'
+    'J'
+    'K'
+    'L'
+    'M'
+    'N'
+    'O'
+    'P'
+    'Q'
+    'R'
+    'S'
+    'T'
+    'U'
+    'V'
+    'W'
+    'X'
+    'Y'
+    'Z'
+    '['
+    '\\'
+    ']'
+    '^'
+    '_'
+    '`'
+    'a'
+    'b'
+    'c'
+    'd'
+    'e'
+    'f'
+    'g'
+    'h'
+    'i'
+    'j'
+    'k'
+    'l'
+    'm'
+    'n'
+    'o'
+    'p'
+    'q'
+    'r'
+    's'
+    't'
+    'u'
+    'v'
+    'w'
+    'x'
+    'y'
+    'z'
+    '{'
+    '|'
+    '}'
+    '~'
+    '\x7f'
+    '\uf780'
+    '\uf781'
+    '\uf782'
+    '\uf783'
+    '\uf784'
+    '\uf785'
+    '\uf786'
+    '\uf787'
+    '\uf788'
+    '\uf789'
+    '\uf78a'
+    '\uf78b'
+    '\uf78c'
+    '\uf78d'
+    '\uf78e'
+    '\uf78f'
+    '\uf790'
+    '\uf791'
+    '\uf792'
+    '\uf793'
+    '\uf794'
+    '\uf795'
+    '\uf796'
+    '\uf797'
+    '\uf798'
+    '\uf799'
+    '\uf79a'
+    '\uf79b'
+    '\uf79c'
+    '\uf79d'
+    '\uf79e'
+    '\uf79f'
+    '\uf7a0'
+    '\uf7a1'
+    '\uf7a2'
+    '\uf7a3'
+    '\uf7a4'
+    '\uf7a5'
+    '\uf7a6'
+    '\uf7a7'
+    '\uf7a8'
+    '\uf7a9'
+    '\uf7aa'
+    '\uf7ab'
+    '\uf7ac'
+    '\uf7ad'
+    '\uf7ae'
+    '\uf7af'
+    '\uf7b0'
+    '\uf7b1'
+    '\uf7b2'
+    '\uf7b3'
+    '\uf7b4'
+    '\uf7b5'
+    '\uf7b6'
+    '\uf7b7'
+    '\uf7b8'
+    '\uf7b9'
+    '\uf7ba'
+    '\uf7bb'
+    '\uf7bc'
+    '\uf7bd'
+    '\uf7be'
+    '\uf7bf'
+    '\uf7c0'
+    '\uf7c1'
+    '\uf7c2'
+    '\uf7c3'
+    '\uf7c4'
+    '\uf7c5'
+    '\uf7c6'
+    '\uf7c7'
+    '\uf7c8'
+    '\uf7c9'
+    '\uf7ca'
+    '\uf7cb'
+    '\uf7cc'
+    '\uf7cd'
+    '\uf7ce'
+    '\uf7cf'
+    '\uf7d0'
+    '\uf7d1'
+    '\uf7d2'
+    '\uf7d3'
+    '\uf7d4'
+    '\uf7d5'
+    '\uf7d6'
+    '\uf7d7'
+    '\uf7d8'
+    '\uf7d9'
+    '\uf7da'
+    '\uf7db'
+    '\uf7dc'
+    '\uf7dd'
+    '\uf7de'
+    '\uf7df'
+    '\uf7e0'
+    '\uf7e1'
+    '\uf7e2'
+    '\uf7e3'
+    '\uf7e4'
+    '\uf7e5'
+    '\uf7e6'
+    '\uf7e7'
+    '\uf7e8'
+    '\uf7e9'
+    '\uf7ea'
+    '\uf7eb'
+    '\uf7ec'
+    '\uf7ed'
+    '\uf7ee'
+    '\uf7ef'
+    '\uf7f0'
+    '\uf7f1'
+    '\uf7f2'
+    '\uf7f3'
+    '\uf7f4'
+    '\uf7f5'
+    '\uf7f6'
+    '\uf7f7'
+    '\uf7f8'
+    '\uf7f9'
+    '\uf7fa'
+    '\uf7fb'
+    '\uf7fc'
+    '\uf7fd'
+    '\uf7fe'
+    '\uf7ff'
+)
+
+### Encoding table
+encoding_table = codecs.charmap_build(decoding_table)
diff --git a/venv/lib/python3.9/site-packages/pip/py.typed b/venv/lib/python3.9/site-packages/pip/py.typed
new file mode 100644
index 0000000..493b53e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pip/py.typed
@@ -0,0 +1,4 @@
+pip is a command line program. While it is implemented in Python, and so is
+available for import, you must not use pip's internal APIs in this way. Typing
+information is provided as a convenience only and is not a guarantee. Expect
+unannounced changes to the API and types in releases.
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/AUTHORS.txt b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/AUTHORS.txt
new file mode 100644
index 0000000..0360f98
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/AUTHORS.txt
@@ -0,0 +1,590 @@
+@Switch01
+A_Rog
+Aakanksha Agrawal
+Abhinav Sagar
+ABHYUDAY PRATAP SINGH
+abs51295
+AceGentile
+Adam Chainz
+Adam Tse
+Adam Wentz
+admin
+Adrien Morison
+ahayrapetyan
+Ahilya
+AinsworthK
+Akash Srivastava
+Alan Yee
+Albert Tugushev
+Albert-Guan
+albertg
+Aleks Bunin
+Alethea Flowers
+Alex Gaynor
+Alex Grönholm
+Alex Loosley
+Alex Morega
+Alex Stachowiak
+Alexander Shtyrov
+Alexandre Conrad
+Alexey Popravka
+Alli
+Ami Fischman
+Ananya Maiti
+Anatoly Techtonik
+Anders Kaseorg
+Andre Aguiar
+Andreas Lutro
+Andrei Geacar
+Andrew Gaul
+Andrey Bulgakov
+Andrés Delfino
+Andy Freeland
+Andy Kluger
+Ani Hayrapetyan
+Aniruddha Basak
+Anish Tambe
+Anrs Hu
+Anthony Sottile
+Antoine Musso
+Anton Ovchinnikov
+Anton Patrushev
+Antonio Alvarado Hernandez
+Antony Lee
+Antti Kaihola
+Anubhav Patel
+Anudit Nagar
+Anuj Godase
+AQNOUCH Mohammed
+AraHaan
+Arindam Choudhury
+Armin Ronacher
+Artem
+Ashley Manton
+Ashwin Ramaswami
+atse
+Atsushi Odagiri
+Avinash Karhana
+Avner Cohen
+Baptiste Mispelon
+Barney Gale
+barneygale
+Bartek Ogryczak
+Bastian Venthur
+Ben Darnell
+Ben Hoyt
+Ben Rosser
+Bence Nagy
+Benjamin Peterson
+Benjamin VanEvery
+Benoit Pierre
+Berker Peksag
+Bernard
+Bernard Tyers
+Bernardo B. Marques
+Bernhard M. Wiedemann
+Bertil Hatt
+Bhavam Vidyarthi
+Bogdan Opanchuk
+BorisZZZ
+Brad Erickson
+Bradley Ayers
+Brandon L. Reiss
+Brandt Bucher
+Brett Randall
+Brian Cristante
+Brian Rosner
+BrownTruck
+Bruno Oliveira
+Bruno Renié
+Bstrdsmkr
+Buck Golemon
+burrows
+Bussonnier Matthias
+c22
+Caleb Martinez
+Calvin Smith
+Carl Meyer
+Carlos Liam
+Carol Willing
+Carter Thayer
+Cass
+Chandrasekhar Atina
+Chih-Hsuan Yen
+Chris Brinker
+Chris Hunt
+Chris Jerdonek
+Chris McDonough
+Chris Wolfe
+Christian Clauss
+Christian Heimes
+Christian Oudard
+Christoph Reiter
+Christopher Hunt
+Christopher Snyder
+cjc7373
+Clark Boylan
+Clay McClure
+Cody
+Cody Soyland
+Colin Watson
+Connor Osborn
+Cooper Lees
+Cooper Ry Lees
+Cory Benfield
+Cory Wright
+Craig Kerstiens
+Cristian Sorinel
+Cristina
+Cristina Muñoz
+Curtis Doty
+cytolentino
+Damian Quiroga
+Dan Black
+Dan Savilonis
+Dan Sully
+daniel
+Daniel Collins
+Daniel Hahler
+Daniel Holth
+Daniel Jost
+Daniel Katz
+Daniel Shaulov
+Daniele Esposti
+Daniele Procida
+Danny Hermes
+Danny McClanahan
+Dav Clark
+Dave Abrahams
+Dave Jones
+David Aguilar
+David Black
+David Bordeynik
+David Caro
+David Evans
+David Linke
+David Poggi
+David Pursehouse
+David Tucker
+David Wales
+Davidovich
+Deepak Sharma
+derwolfe
+Desetude
+Devesh Kumar Singh
+Diego Caraballo
+DiegoCaraballo
+Dmitry Gladkov
+Domen Kožar
+Donald Stufft
+Dongweiming
+Douglas Thor
+DrFeathers
+Dustin Ingram
+Dwayne Bailey
+Ed Morley
+Eitan Adler
+ekristina
+elainechan
+Eli Schwartz
+Elisha Hollander
+Ellen Marie Dash
+Emil Burzo
+Emil Styrke
+Emmanuel Arias
+Endoh Takanao
+enoch
+Erdinc Mutlu
+Eric Gillingham
+Eric Hanchrow
+Eric Hopper
+Erik M. Bray
+Erik Rose
+Ernest W Durbin III
+Ernest W. Durbin III
+Erwin Janssen
+Eugene Vereshchagin
+everdimension
+Felix Yan
+fiber-space
+Filip Kokosiński
+Filipe Laíns
+Florian Briand
+Florian Rathgeber
+Francesco
+Francesco Montesano
+Frost Ming
+Gabriel Curio
+Gabriel de Perthuis
+Garry Polley
+gdanielson
+Geoffrey Sneddon
+George Song
+Georgi Valkov
+ghost
+Giftlin Rajaiah
+gizmoguy1
+gkdoc
+Gopinath M
+GOTO Hayato
+gpiks
+Greg Ward
+Guilherme Espada
+gutsytechster
+Guy Rozendorn
+gzpan123
+Hanjun Kim
+Hari Charan
+Harsh Vardhan
+Herbert Pfennig
+Hsiaoming Yang
+Hugo
+Hugo Lopes Tavares
+Hugo van Kemenade
+hugovk
+Hynek Schlawack
+Ian Bicking
+Ian Cordasco
+Ian Lee
+Ian Stapleton Cordasco
+Ian Wienand
+Igor Kuzmitshov
+Igor Sobreira
+Ilan Schnell
+Ilya Baryshev
+INADA Naoki
+Ionel Cristian Mărieș
+Ionel Maries Cristian
+Ivan Pozdeev
+Jacob Kim
+jakirkham
+Jakub Stasiak
+Jakub Vysoky
+Jakub Wilk
+James Cleveland
+James Firth
+James Polley
+Jan Pokorný
+Jannis Leidel
+jarondl
+Jason R. Coombs
+Jay Graves
+Jean-Christophe Fillion-Robin
+Jeff Barber
+Jeff Dairiki
+Jelmer Vernooĳ
+jenix21
+Jeremy Stanley
+Jeremy Zafran
+Jiashuo Li
+Jim Garrison
+Jivan Amara
+John Paton
+John T. Wodder II
+John-Scott Atlakson
+johnthagen
+Jon Banafato
+Jon Dufresne
+Jon Parise
+Jonas Nockert
+Jonathan Herbert
+Joost Molenaar
+Jorge Niedbalski
+Joseph Long
+Josh Bronson
+Josh Hansen
+Josh Schneier
+Juanjo Bazán
+Julian Berman
+Julian Gethmann
+Julien Demoor
+Jussi Kukkonen
+jwg4
+Jyrki Pulliainen
+Kai Chen
+Kamal Bin Mustafa
+kaustav haldar
+keanemind
+Keith Maxwell
+Kelsey Hightower
+Kenneth Belitzky
+Kenneth Reitz
+Kevin Burke
+Kevin Carter
+Kevin Frommelt
+Kevin R Patterson
+Kexuan Sun
+Kit Randel
+KOLANICH
+kpinc
+Krishna Oza
+Kumar McMillan
+Kyle Persohn
+lakshmanaram
+Laszlo Kiss-Kollar
+Laurent Bristiel
+Laurie O
+Laurie Opperman
+Leon Sasson
+Lev Givon
+Lincoln de Sousa
+Lipis
+Loren Carvalho
+Lucas Cimon
+Ludovic Gasc
+Luke Macken
+Luo Jiebin
+luojiebin
+luz.paz
+László Kiss Kollár
+Marc Abramowitz
+Marc Tamlyn
+Marcus Smith
+Mariatta
+Mark Kohler
+Mark Williams
+Markus Hametner
+Masaki
+Masklinn
+Matej Stuchlik
+Mathew Jennings
+Mathieu Bridon
+Matt Good
+Matt Maker
+Matt Robenolt
+matthew
+Matthew Einhorn
+Matthew Gilliard
+Matthew Iversen
+Matthew Trumbell
+Matthew Willson
+Matthias Bussonnier
+mattip
+Maxim Kurnikov
+Maxime Rouyrre
+mayeut
+mbaluna
+mdebi
+memoselyk
+Michael
+Michael Aquilina
+Michael E. Karpeles
+Michael Klich
+Michael Williamson
+michaelpacer
+Mickaël Schoentgen
+Miguel Araujo Perez
+Mihir Singh
+Mike
+Mike Hendricks
+Min RK
+MinRK
+Miro Hrončok
+Monica Baluna
+montefra
+Monty Taylor
+Nate Coraor
+Nathaniel J. Smith
+Nehal J Wani
+Neil Botelho
+Nguyễn Gia Phong
+Nick Coghlan
+Nick Stenning
+Nick Timkovich
+Nicolas Bock
+Nicole Harris
+Nikhil Benesch
+Nikolay Korolev
+Nitesh Sharma
+Noah
+Noah Gorny
+Nowell Strite
+NtaleGrey
+nvdv
+Ofekmeister
+ofrinevo
+Oliver Jeeves
+Oliver Mannion
+Oliver Tonnhofer
+Olivier Girardot
+Olivier Grisel
+Ollie Rutherfurd
+OMOTO Kenji
+Omry Yadan
+onlinejudge95
+Oren Held
+Oscar Benjamin
+Oz N Tiram
+Pachwenko
+Patrick Dubroy
+Patrick Jenkins
+Patrick Lawson
+patricktokeeffe
+Patrik Kopkan
+Paul Kehrer
+Paul Moore
+Paul Nasrat
+Paul Oswald
+Paul van der Linden
+Paulus Schoutsen
+Pavithra Eswaramoorthy
+Pawel Jasinski
+Pekka Klärck
+Peter Lisák
+Peter Waller
+petr-tik
+Phaneendra Chiruvella
+Phil Elson
+Phil Freo
+Phil Pennock
+Phil Whelan
+Philip Jägenstedt
+Philip Molloy
+Philippe Ombredanne
+Pi Delport
+Pierre-Yves Rofes
+pip
+Prabakaran Kumaresshan
+Prabhjyotsing Surjit Singh Sodhi
+Prabhu Marappan
+Pradyun Gedam
+Prashant Sharma
+Pratik Mallya
+Preet Thakkar
+Preston Holmes
+Przemek Wrzos
+Pulkit Goyal
+Qiangning Hong
+Quentin Pradet
+R. David Murray
+Rafael Caricio
+Ralf Schmitt
+Razzi Abuissa
+rdb
+Reece Dunham
+Remi Rampin
+Rene Dudfield
+Riccardo Magliocchetti
+Richard Jones
+Ricky Ng-Adam
+RobberPhex
+Robert Collins
+Robert McGibbon
+Robert T. McGibbon
+robin elisha robinson
+Roey Berman
+Rohan Jain
+Roman Bogorodskiy
+Romuald Brunet
+Ronny Pfannschmidt
+Rory McCann
+Ross Brattain
+Roy Wellington Ⅳ
+Ruairidh MacLeod
+Ryan Wooden
+ryneeverett
+Sachi King
+Salvatore Rinchiera
+Savio Jomton
+schlamar
+Scott Kitterman
+Sean
+seanj
+Sebastian Jordan
+Sebastian Schaetz
+Segev Finer
+SeongSoo Cho
+Sergey Vasilyev
+Seth Woodworth
+shireenrao
+Shlomi Fish
+Shovan Maity
+Simeon Visser
+Simon Cross
+Simon Pichugin
+sinoroc
+sinscary
+socketubs
+Sorin Sbarnea
+Srinivas Nyayapati
+Stavros Korokithakis
+Stefan Scherfke
+Stefano Rivera
+Stephan Erb
+stepshal
+Steve (Gadget) Barnes
+Steve Barnes
+Steve Dower
+Steve Kowalik
+Steven Myint
+stonebig
+Stéphane Bidoul
+Stéphane Bidoul (ACSONE)
+Stéphane Klein
+Sumana Harihareswara
+Surbhi Sharma
+Sviatoslav Sydorenko
+Swat009
+Takayuki SHIMIZUKAWA
+tbeswick
+Thijs Triemstra
+Thomas Fenzl
+Thomas Grainger
+Thomas Guettler
+Thomas Johansson
+Thomas Kluyver
+Thomas Smith
+Tim D. Smith
+Tim Gates
+Tim Harder
+Tim Heap
+tim smith
+tinruufu
+Tom Forbes
+Tom Freudenheim
+Tom V
+Tomas Hrnciar
+Tomas Orsava
+Tomer Chachamu
+Tony Beswick
+Tony Zhaocheng Tan
+TonyBeswick
+toonarmycaptain
+Toshio Kuratomi
+toxinu
+Travis Swicegood
+Tzu-ping Chung
+Valentin Haenel
+Victor Stinner
+victorvpaulo
+Vikram - Google
+Viktor Szépe
+Ville Skyttä
+Vinay Sajip
+Vincent Philippon
+Vinicyus Macedo
+Vipul Kumar
+Vitaly Babiy
+Vladimir Rutsky
+W. Trevor King
+Wil Tan
+Wilfred Hughes
+William ML Leslie
+William T Olson
+Wilson Mo
+wim glenn
+Wolfgang Maier
+Xavier Fernandez
+xoviat
+xtreak
+YAMAMOTO Takashi
+Yen Chi Hsuan
+Yeray Diaz Diaz
+Yoval P
+Yu Jian
+Yuan Jing Vincent Yan
+Zearin
+Zhiping Deng
+Zvezdan Petkovic
+Łukasz Langa
+Семён Марьясин
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/LICENSE.txt b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/LICENSE.txt
new file mode 100644
index 0000000..75eb0fd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2008-2020 The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/METADATA b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/METADATA
new file mode 100644
index 0000000..cf6c930
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/METADATA
@@ -0,0 +1,13 @@
+Metadata-Version: 2.1
+Name: pkg_resources
+Version: 0.0.0
+Summary: UNKNOWN
+Home-page: UNKNOWN
+Author: UNKNOWN
+Author-email: UNKNOWN
+License: UNKNOWN
+Platform: UNKNOWN
+
+UNKNOWN
+
+
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/RECORD b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/RECORD
new file mode 100644
index 0000000..2cc7da9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/RECORD
@@ -0,0 +1,39 @@
+pkg_resources-0.0.0.dist-info/AUTHORS.txt,sha256=ilkpJ4nuW3rRgU3fX4EufclaM4Y7RsZu5uOu0oizmNM,8036
+pkg_resources-0.0.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+pkg_resources-0.0.0.dist-info/LICENSE.txt,sha256=gdAS_gPyTUkBTvvgoNNlG9Mv1KFDTig6W1JdeMD2Efg,1090
+pkg_resources-0.0.0.dist-info/METADATA,sha256=V9_WPOtD1FnuKrTGv6Ique7kAOn2lasvT8W0_iMCCCk,177
+pkg_resources-0.0.0.dist-info/RECORD,,
+pkg_resources-0.0.0.dist-info/REQUESTED,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+pkg_resources-0.0.0.dist-info/WHEEL,sha256=kGT74LWyRUZrL4VgLh6_g12IeVl_9u9ZVhadrgXZUEY,110
+pkg_resources/__init__.py,sha256=0IssxXPnaDKpYZRra8Ime0JG4hwosQljItGD0bnIkGk,108349
+pkg_resources/__pycache__/__init__.cpython-39.pyc,,
+pkg_resources/__pycache__/py31compat.cpython-39.pyc,,
+pkg_resources/_vendor/__init__.py,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0
+pkg_resources/_vendor/__pycache__/__init__.cpython-39.pyc,,
+pkg_resources/_vendor/__pycache__/appdirs.cpython-39.pyc,,
+pkg_resources/_vendor/__pycache__/pyparsing.cpython-39.pyc,,
+pkg_resources/_vendor/__pycache__/six.cpython-39.pyc,,
+pkg_resources/_vendor/appdirs.py,sha256=MievUEuv3l_mQISH5SF0shDk_BNhHHzYiAPrT3ITN4I,24701
+pkg_resources/_vendor/packaging/__about__.py,sha256=zkcCPTN_6TcLW0Nrlg0176-R1QQ_WVPTm8sz1R4-HjM,720
+pkg_resources/_vendor/packaging/__init__.py,sha256=_vNac5TrzwsrzbOFIbF-5cHqc_Y2aPT2D7zrIR06BOo,513
+pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/markers.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/utils.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/__pycache__/version.cpython-39.pyc,,
+pkg_resources/_vendor/packaging/_compat.py,sha256=Vi_A0rAQeHbU-a9X0tt1yQm9RqkgQbDSxzRw8WlU9kA,860
+pkg_resources/_vendor/packaging/_structures.py,sha256=RImECJ4c_wTlaTYYwZYLHEiebDMaAJmK1oPARhw1T5o,1416
+pkg_resources/_vendor/packaging/markers.py,sha256=uEcBBtGvzqltgnArqb9c4RrcInXezDLos14zbBHhWJo,8248
+pkg_resources/_vendor/packaging/requirements.py,sha256=SikL2UynbsT0qtY9ltqngndha_sfo0w6XGFhAhoSoaQ,4355
+pkg_resources/_vendor/packaging/specifiers.py,sha256=SAMRerzO3fK2IkFZCaZkuwZaL_EGqHNOz4pni4vhnN0,28025
+pkg_resources/_vendor/packaging/utils.py,sha256=3m6WvPm6NNxE8rkTGmn0r75B_GZSGg7ikafxHsBN1WA,421
+pkg_resources/_vendor/packaging/version.py,sha256=OwGnxYfr2ghNzYx59qWIBkrK3SnB6n-Zfd1XaLpnnM0,11556
+pkg_resources/_vendor/pyparsing.py,sha256=tmrp-lu-qO1i75ZzIN5A12nKRRD1Cm4Vpk-5LR9rims,232055
+pkg_resources/_vendor/six.py,sha256=A6hdJZVjI3t_geebZ9BzUvwRrIXo0lfwzQlM2LcKyas,30098
+pkg_resources/extern/__init__.py,sha256=cHiEfHuLmm6rs5Ve_ztBfMI7Lr31vss-D4wkqF5xzlI,2498
+pkg_resources/extern/__pycache__/__init__.cpython-39.pyc,,
+pkg_resources/py31compat.py,sha256=-WQ0e4c3RG_acdhwC3gLiXhP_lg4G5q7XYkZkQg0gxU,558
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/REQUESTED b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/REQUESTED
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/REQUESTED
diff --git a/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/WHEEL b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources-0.0.0.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/__init__.py b/venv/lib/python3.9/site-packages/pkg_resources/__init__.py
new file mode 100644
index 0000000..2f5aa64
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/__init__.py
@@ -0,0 +1,3296 @@
+# coding: utf-8
+"""
+Package resource API
+--------------------
+
+A resource is a logical file contained within a package, or a logical
+subdirectory thereof.  The package resource API expects resource names
+to have their path parts separated with ``/``, *not* whatever the local
+path separator is.  Do not use os.path operations to manipulate resource
+names being passed into the API.
+
+The package resource API is designed to work with normal filesystem packages,
+.egg files, and unpacked .egg files.  It can also work in a limited way with
+.zip files and with custom PEP 302 loaders that support the ``get_data()``
+method.
+"""
+
+from __future__ import absolute_import
+
+import sys
+import os
+import io
+import time
+import re
+import types
+import zipfile
+import zipimport
+import warnings
+import stat
+import functools
+import pkgutil
+import operator
+import platform
+import collections
+import plistlib
+import email.parser
+import errno
+import tempfile
+import textwrap
+import itertools
+import inspect
+import ntpath
+import posixpath
+from pkgutil import get_importer
+
+try:
+    import _imp
+except ImportError:
+    # Python 3.2 compatibility
+    import imp as _imp
+
+try:
+    FileExistsError
+except NameError:
+    FileExistsError = OSError
+
+from pkg_resources.extern import six
+from pkg_resources.extern.six.moves import urllib, map, filter
+
+# capture these to bypass sandboxing
+from os import utime
+try:
+    from os import mkdir, rename, unlink
+    WRITE_SUPPORT = True
+except ImportError:
+    # no write support, probably under GAE
+    WRITE_SUPPORT = False
+
+from os import open as os_open
+from os.path import isdir, split
+
+try:
+    import importlib.machinery as importlib_machinery
+    # access attribute to force import under delayed import mechanisms.
+    importlib_machinery.__name__
+except ImportError:
+    importlib_machinery = None
+
+from . import py31compat
+from pkg_resources.extern import appdirs
+from pkg_resources.extern import packaging
+__import__('pkg_resources.extern.packaging.version')
+__import__('pkg_resources.extern.packaging.specifiers')
+__import__('pkg_resources.extern.packaging.requirements')
+__import__('pkg_resources.extern.packaging.markers')
+
+
+__metaclass__ = type
+
+
+if (3, 0) < sys.version_info < (3, 5):
+    raise RuntimeError("Python 3.5 or later is required")
+
+if six.PY2:
+    # Those builtin exceptions are only defined in Python 3
+    PermissionError = None
+    NotADirectoryError = None
+
+# declare some globals that will be defined later to
+# satisfy the linters.
+require = None
+working_set = None
+add_activation_listener = None
+resources_stream = None
+cleanup_resources = None
+resource_dir = None
+resource_stream = None
+set_extraction_path = None
+resource_isdir = None
+resource_string = None
+iter_entry_points = None
+resource_listdir = None
+resource_filename = None
+resource_exists = None
+_distribution_finders = None
+_namespace_handlers = None
+_namespace_packages = None
+
+
+class PEP440Warning(RuntimeWarning):
+    """
+    Used when there is an issue with a version or specifier not complying with
+    PEP 440.
+    """
+
+
+def parse_version(v):
+    try:
+        return packaging.version.Version(v)
+    except packaging.version.InvalidVersion:
+        return packaging.version.LegacyVersion(v)
+
+
+_state_vars = {}
+
+
+def _declare_state(vartype, **kw):
+    globals().update(kw)
+    _state_vars.update(dict.fromkeys(kw, vartype))
+
+
+def __getstate__():
+    state = {}
+    g = globals()
+    for k, v in _state_vars.items():
+        state[k] = g['_sget_' + v](g[k])
+    return state
+
+
+def __setstate__(state):
+    g = globals()
+    for k, v in state.items():
+        g['_sset_' + _state_vars[k]](k, g[k], v)
+    return state
+
+
+def _sget_dict(val):
+    return val.copy()
+
+
+def _sset_dict(key, ob, state):
+    ob.clear()
+    ob.update(state)
+
+
+def _sget_object(val):
+    return val.__getstate__()
+
+
+def _sset_object(key, ob, state):
+    ob.__setstate__(state)
+
+
+_sget_none = _sset_none = lambda *args: None
+
+
+def get_supported_platform():
+    """Return this platform's maximum compatible version.
+
+    distutils.util.get_platform() normally reports the minimum version
+    of Mac OS X that would be required to *use* extensions produced by
+    distutils.  But what we want when checking compatibility is to know the
+    version of Mac OS X that we are *running*.  To allow usage of packages that
+    explicitly require a newer version of Mac OS X, we must also know the
+    current version of the OS.
+
+    If this condition occurs for any other platform with a version in its
+    platform strings, this function should be extended accordingly.
+    """
+    plat = get_build_platform()
+    m = macosVersionString.match(plat)
+    if m is not None and sys.platform == "darwin":
+        try:
+            plat = 'macosx-%s-%s' % ('.'.join(_macosx_vers()[:2]), m.group(3))
+        except ValueError:
+            # not Mac OS X
+            pass
+    return plat
+
+
+__all__ = [
+    # Basic resource access and distribution/entry point discovery
+    'require', 'run_script', 'get_provider', 'get_distribution',
+    'load_entry_point', 'get_entry_map', 'get_entry_info',
+    'iter_entry_points',
+    'resource_string', 'resource_stream', 'resource_filename',
+    'resource_listdir', 'resource_exists', 'resource_isdir',
+
+    # Environmental control
+    'declare_namespace', 'working_set', 'add_activation_listener',
+    'find_distributions', 'set_extraction_path', 'cleanup_resources',
+    'get_default_cache',
+
+    # Primary implementation classes
+    'Environment', 'WorkingSet', 'ResourceManager',
+    'Distribution', 'Requirement', 'EntryPoint',
+
+    # Exceptions
+    'ResolutionError', 'VersionConflict', 'DistributionNotFound',
+    'UnknownExtra', 'ExtractionError',
+
+    # Warnings
+    'PEP440Warning',
+
+    # Parsing functions and string utilities
+    'parse_requirements', 'parse_version', 'safe_name', 'safe_version',
+    'get_platform', 'compatible_platforms', 'yield_lines', 'split_sections',
+    'safe_extra', 'to_filename', 'invalid_marker', 'evaluate_marker',
+
+    # filesystem utilities
+    'ensure_directory', 'normalize_path',
+
+    # Distribution "precedence" constants
+    'EGG_DIST', 'BINARY_DIST', 'SOURCE_DIST', 'CHECKOUT_DIST', 'DEVELOP_DIST',
+
+    # "Provider" interfaces, implementations, and registration/lookup APIs
+    'IMetadataProvider', 'IResourceProvider', 'FileMetadata',
+    'PathMetadata', 'EggMetadata', 'EmptyProvider', 'empty_provider',
+    'NullProvider', 'EggProvider', 'DefaultProvider', 'ZipProvider',
+    'register_finder', 'register_namespace_handler', 'register_loader_type',
+    'fixup_namespace_packages', 'get_importer',
+
+    # Warnings
+    'PkgResourcesDeprecationWarning',
+
+    # Deprecated/backward compatibility only
+    'run_main', 'AvailableDistributions',
+]
+
+
+class ResolutionError(Exception):
+    """Abstract base for dependency resolution errors"""
+
+    def __repr__(self):
+        return self.__class__.__name__ + repr(self.args)
+
+
+class VersionConflict(ResolutionError):
+    """
+    An already-installed version conflicts with the requested version.
+
+    Should be initialized with the installed Distribution and the requested
+    Requirement.
+    """
+
+    _template = "{self.dist} is installed but {self.req} is required"
+
+    @property
+    def dist(self):
+        return self.args[0]
+
+    @property
+    def req(self):
+        return self.args[1]
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def with_context(self, required_by):
+        """
+        If required_by is non-empty, return a version of self that is a
+        ContextualVersionConflict.
+        """
+        if not required_by:
+            return self
+        args = self.args + (required_by,)
+        return ContextualVersionConflict(*args)
+
+
+class ContextualVersionConflict(VersionConflict):
+    """
+    A VersionConflict that accepts a third parameter, the set of the
+    requirements that required the installed Distribution.
+    """
+
+    _template = VersionConflict._template + ' by {self.required_by}'
+
+    @property
+    def required_by(self):
+        return self.args[2]
+
+
+class DistributionNotFound(ResolutionError):
+    """A requested distribution was not found"""
+
+    _template = ("The '{self.req}' distribution was not found "
+                 "and is required by {self.requirers_str}")
+
+    @property
+    def req(self):
+        return self.args[0]
+
+    @property
+    def requirers(self):
+        return self.args[1]
+
+    @property
+    def requirers_str(self):
+        if not self.requirers:
+            return 'the application'
+        return ', '.join(self.requirers)
+
+    def report(self):
+        return self._template.format(**locals())
+
+    def __str__(self):
+        return self.report()
+
+
+class UnknownExtra(ResolutionError):
+    """Distribution doesn't have an "extra feature" of the given name"""
+
+
+_provider_factories = {}
+
+PY_MAJOR = '{}.{}'.format(*sys.version_info)
+EGG_DIST = 3
+BINARY_DIST = 2
+SOURCE_DIST = 1
+CHECKOUT_DIST = 0
+DEVELOP_DIST = -1
+
+
+def register_loader_type(loader_type, provider_factory):
+    """Register `provider_factory` to make providers for `loader_type`
+
+    `loader_type` is the type or class of a PEP 302 ``module.__loader__``,
+    and `provider_factory` is a function that, passed a *module* object,
+    returns an ``IResourceProvider`` for that module.
+    """
+    _provider_factories[loader_type] = provider_factory
+
+
+def get_provider(moduleOrReq):
+    """Return an IResourceProvider for the named module or requirement"""
+    if isinstance(moduleOrReq, Requirement):
+        return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
+    try:
+        module = sys.modules[moduleOrReq]
+    except KeyError:
+        __import__(moduleOrReq)
+        module = sys.modules[moduleOrReq]
+    loader = getattr(module, '__loader__', None)
+    return _find_adapter(_provider_factories, loader)(module)
+
+
+def _macosx_vers(_cache=[]):
+    if not _cache:
+        version = platform.mac_ver()[0]
+        # fallback for MacPorts
+        if version == '':
+            plist = '/System/Library/CoreServices/SystemVersion.plist'
+            if os.path.exists(plist):
+                if hasattr(plistlib, 'readPlist'):
+                    plist_content = plistlib.readPlist(plist)
+                    if 'ProductVersion' in plist_content:
+                        version = plist_content['ProductVersion']
+
+        _cache.append(version.split('.'))
+    return _cache[0]
+
+
+def _macosx_arch(machine):
+    return {'PowerPC': 'ppc', 'Power_Macintosh': 'ppc'}.get(machine, machine)
+
+
+def get_build_platform():
+    """Return this platform's string for platform-specific distributions
+
+    XXX Currently this is the same as ``distutils.util.get_platform()``, but it
+    needs some hacks for Linux and Mac OS X.
+    """
+    from sysconfig import get_platform
+
+    plat = get_platform()
+    if sys.platform == "darwin" and not plat.startswith('macosx-'):
+        try:
+            version = _macosx_vers()
+            machine = os.uname()[4].replace(" ", "_")
+            return "macosx-%d.%d-%s" % (
+                int(version[0]), int(version[1]),
+                _macosx_arch(machine),
+            )
+        except ValueError:
+            # if someone is running a non-Mac darwin system, this will fall
+            # through to the default implementation
+            pass
+    return plat
+
+
+macosVersionString = re.compile(r"macosx-(\d+)\.(\d+)-(.*)")
+darwinVersionString = re.compile(r"darwin-(\d+)\.(\d+)\.(\d+)-(.*)")
+# XXX backward compat
+get_platform = get_build_platform
+
+
+def compatible_platforms(provided, required):
+    """Can code for the `provided` platform run on the `required` platform?
+
+    Returns true if either platform is ``None``, or the platforms are equal.
+
+    XXX Needs compatibility checks for Linux and other unixy OSes.
+    """
+    if provided is None or required is None or provided == required:
+        # easy case
+        return True
+
+    # Mac OS X special cases
+    reqMac = macosVersionString.match(required)
+    if reqMac:
+        provMac = macosVersionString.match(provided)
+
+        # is this a Mac package?
+        if not provMac:
+            # this is backwards compatibility for packages built before
+            # setuptools 0.6. All packages built after this point will
+            # use the new macosx designation.
+            provDarwin = darwinVersionString.match(provided)
+            if provDarwin:
+                dversion = int(provDarwin.group(1))
+                macosversion = "%s.%s" % (reqMac.group(1), reqMac.group(2))
+                if dversion == 7 and macosversion >= "10.3" or \
+                        dversion == 8 and macosversion >= "10.4":
+                    return True
+            # egg isn't macosx or legacy darwin
+            return False
+
+        # are they the same major version and machine type?
+        if provMac.group(1) != reqMac.group(1) or \
+                provMac.group(3) != reqMac.group(3):
+            return False
+
+        # is the required OS major update >= the provided one?
+        if int(provMac.group(2)) > int(reqMac.group(2)):
+            return False
+
+        return True
+
+    # XXX Linux and other platforms' special cases should go here
+    return False
+
+
+def run_script(dist_spec, script_name):
+    """Locate distribution `dist_spec` and run its `script_name` script"""
+    ns = sys._getframe(1).f_globals
+    name = ns['__name__']
+    ns.clear()
+    ns['__name__'] = name
+    require(dist_spec)[0].run_script(script_name, ns)
+
+
+# backward compatibility
+run_main = run_script
+
+
+def get_distribution(dist):
+    """Return a current distribution object for a Requirement or string"""
+    if isinstance(dist, six.string_types):
+        dist = Requirement.parse(dist)
+    if isinstance(dist, Requirement):
+        dist = get_provider(dist)
+    if not isinstance(dist, Distribution):
+        raise TypeError("Expected string, Requirement, or Distribution", dist)
+    return dist
+
+
+def load_entry_point(dist, group, name):
+    """Return `name` entry point of `group` for `dist` or raise ImportError"""
+    return get_distribution(dist).load_entry_point(group, name)
+
+
+def get_entry_map(dist, group=None):
+    """Return the entry point map for `group`, or the full entry map"""
+    return get_distribution(dist).get_entry_map(group)
+
+
+def get_entry_info(dist, group, name):
+    """Return the EntryPoint object for `group`+`name`, or ``None``"""
+    return get_distribution(dist).get_entry_info(group, name)
+
+
+class IMetadataProvider:
+    def has_metadata(name):
+        """Does the package's distribution contain the named metadata?"""
+
+    def get_metadata(name):
+        """The named metadata resource as a string"""
+
+    def get_metadata_lines(name):
+        """Yield named metadata resource as list of non-blank non-comment lines
+
+       Leading and trailing whitespace is stripped from each line, and lines
+       with ``#`` as the first non-blank character are omitted."""
+
+    def metadata_isdir(name):
+        """Is the named metadata a directory?  (like ``os.path.isdir()``)"""
+
+    def metadata_listdir(name):
+        """List of metadata names in the directory (like ``os.listdir()``)"""
+
+    def run_script(script_name, namespace):
+        """Execute the named script in the supplied namespace dictionary"""
+
+
+class IResourceProvider(IMetadataProvider):
+    """An object that provides access to package resources"""
+
+    def get_resource_filename(manager, resource_name):
+        """Return a true filesystem path for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_stream(manager, resource_name):
+        """Return a readable file-like object for `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def get_resource_string(manager, resource_name):
+        """Return a string containing the contents of `resource_name`
+
+        `manager` must be an ``IResourceManager``"""
+
+    def has_resource(resource_name):
+        """Does the package contain the named resource?"""
+
+    def resource_isdir(resource_name):
+        """Is the named resource a directory?  (like ``os.path.isdir()``)"""
+
+    def resource_listdir(resource_name):
+        """List of resource names in the directory (like ``os.listdir()``)"""
+
+
+class WorkingSet:
+    """A collection of active distributions on sys.path (or a similar list)"""
+
+    def __init__(self, entries=None):
+        """Create working set from list of path entries (default=sys.path)"""
+        self.entries = []
+        self.entry_keys = {}
+        self.by_key = {}
+        self.callbacks = []
+
+        if entries is None:
+            entries = sys.path
+
+        for entry in entries:
+            self.add_entry(entry)
+
+    @classmethod
+    def _build_master(cls):
+        """
+        Prepare the master working set.
+        """
+        ws = cls()
+        try:
+            from __main__ import __requires__
+        except ImportError:
+            # The main program does not list any requirements
+            return ws
+
+        # ensure the requirements are met
+        try:
+            ws.require(__requires__)
+        except VersionConflict:
+            return cls._build_from_requirements(__requires__)
+
+        return ws
+
+    @classmethod
+    def _build_from_requirements(cls, req_spec):
+        """
+        Build a working set from a requirement spec. Rewrites sys.path.
+        """
+        # try it without defaults already on sys.path
+        # by starting with an empty path
+        ws = cls([])
+        reqs = parse_requirements(req_spec)
+        dists = ws.resolve(reqs, Environment())
+        for dist in dists:
+            ws.add(dist)
+
+        # add any missing entries from sys.path
+        for entry in sys.path:
+            if entry not in ws.entries:
+                ws.add_entry(entry)
+
+        # then copy back to sys.path
+        sys.path[:] = ws.entries
+        return ws
+
+    def add_entry(self, entry):
+        """Add a path item to ``.entries``, finding any distributions on it
+
+        ``find_distributions(entry, True)`` is used to find distributions
+        corresponding to the path entry, and they are added.  `entry` is
+        always appended to ``.entries``, even if it is already present.
+        (This is because ``sys.path`` can contain the same value more than
+        once, and the ``.entries`` of the ``sys.path`` WorkingSet should always
+        equal ``sys.path``.)
+        """
+        self.entry_keys.setdefault(entry, [])
+        self.entries.append(entry)
+        for dist in find_distributions(entry, True):
+            self.add(dist, entry, False)
+
+    def __contains__(self, dist):
+        """True if `dist` is the active distribution for its project"""
+        return self.by_key.get(dist.key) == dist
+
+    def find(self, req):
+        """Find a distribution matching requirement `req`
+
+        If there is an active distribution for the requested project, this
+        returns it as long as it meets the version requirement specified by
+        `req`.  But, if there is an active distribution for the project and it
+        does *not* meet the `req` requirement, ``VersionConflict`` is raised.
+        If there is no active distribution for the requested project, ``None``
+        is returned.
+        """
+        dist = self.by_key.get(req.key)
+        if dist is not None and dist not in req:
+            # XXX add more info
+            raise VersionConflict(dist, req)
+        return dist
+
+    def iter_entry_points(self, group, name=None):
+        """Yield entry point objects from `group` matching `name`
+
+        If `name` is None, yields all entry points in `group` from all
+        distributions in the working set, otherwise only ones matching
+        both `group` and `name` are yielded (in distribution order).
+        """
+        return (
+            entry
+            for dist in self
+            for entry in dist.get_entry_map(group).values()
+            if name is None or name == entry.name
+        )
+
+    def run_script(self, requires, script_name):
+        """Locate distribution for `requires` and run `script_name` script"""
+        ns = sys._getframe(1).f_globals
+        name = ns['__name__']
+        ns.clear()
+        ns['__name__'] = name
+        self.require(requires)[0].run_script(script_name, ns)
+
+    def __iter__(self):
+        """Yield distributions for non-duplicate projects in the working set
+
+        The yield order is the order in which the items' path entries were
+        added to the working set.
+        """
+        seen = {}
+        for item in self.entries:
+            if item not in self.entry_keys:
+                # workaround a cache issue
+                continue
+
+            for key in self.entry_keys[item]:
+                if key not in seen:
+                    seen[key] = 1
+                    yield self.by_key[key]
+
+    def add(self, dist, entry=None, insert=True, replace=False):
+        """Add `dist` to working set, associated with `entry`
+
+        If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
+        On exit from this routine, `entry` is added to the end of the working
+        set's ``.entries`` (if it wasn't already present).
+
+        `dist` is only added to the working set if it's for a project that
+        doesn't already have a distribution in the set, unless `replace=True`.
+        If it's added, any callbacks registered with the ``subscribe()`` method
+        will be called.
+        """
+        if insert:
+            dist.insert_on(self.entries, entry, replace=replace)
+
+        if entry is None:
+            entry = dist.location
+        keys = self.entry_keys.setdefault(entry, [])
+        keys2 = self.entry_keys.setdefault(dist.location, [])
+        if not replace and dist.key in self.by_key:
+            # ignore hidden distros
+            return
+
+        self.by_key[dist.key] = dist
+        if dist.key not in keys:
+            keys.append(dist.key)
+        if dist.key not in keys2:
+            keys2.append(dist.key)
+        self._added_new(dist)
+
+    def resolve(self, requirements, env=None, installer=None,
+                replace_conflicting=False, extras=None):
+        """List all distributions needed to (recursively) meet `requirements`
+
+        `requirements` must be a sequence of ``Requirement`` objects.  `env`,
+        if supplied, should be an ``Environment`` instance.  If
+        not supplied, it defaults to all distributions available within any
+        entry or distribution in the working set.  `installer`, if supplied,
+        will be invoked with each requirement that cannot be met by an
+        already-installed distribution; it should return a ``Distribution`` or
+        ``None``.
+
+        Unless `replace_conflicting=True`, raises a VersionConflict exception
+        if
+        any requirements are found on the path that have the correct name but
+        the wrong version.  Otherwise, if an `installer` is supplied it will be
+        invoked to obtain the correct version of the requirement and activate
+        it.
+
+        `extras` is a list of the extras to be used with these requirements.
+        This is important because extra requirements may look like `my_req;
+        extra = "my_extra"`, which would otherwise be interpreted as a purely
+        optional requirement.  Instead, we want to be able to assert that these
+        requirements are truly required.
+        """
+
+        # set up the stack
+        requirements = list(requirements)[::-1]
+        # set of processed requirements
+        processed = {}
+        # key -> dist
+        best = {}
+        to_activate = []
+
+        req_extras = _ReqExtras()
+
+        # Mapping of requirement to set of distributions that required it;
+        # useful for reporting info about conflicts.
+        required_by = collections.defaultdict(set)
+
+        while requirements:
+            # process dependencies breadth-first
+            req = requirements.pop(0)
+            if req in processed:
+                # Ignore cyclic or redundant dependencies
+                continue
+
+            if not req_extras.markers_pass(req, extras):
+                continue
+
+            dist = best.get(req.key)
+            if dist is None:
+                # Find the best distribution and add it to the map
+                dist = self.by_key.get(req.key)
+                if dist is None or (dist not in req and replace_conflicting):
+                    ws = self
+                    if env is None:
+                        if dist is None:
+                            env = Environment(self.entries)
+                        else:
+                            # Use an empty environment and workingset to avoid
+                            # any further conflicts with the conflicting
+                            # distribution
+                            env = Environment([])
+                            ws = WorkingSet([])
+                    dist = best[req.key] = env.best_match(
+                        req, ws, installer,
+                        replace_conflicting=replace_conflicting
+                    )
+                    if dist is None:
+                        requirers = required_by.get(req, None)
+                        raise DistributionNotFound(req, requirers)
+                to_activate.append(dist)
+            if dist not in req:
+                # Oops, the "best" so far conflicts with a dependency
+                dependent_req = required_by[req]
+                raise VersionConflict(dist, req).with_context(dependent_req)
+
+            # push the new requirements onto the stack
+            new_requirements = dist.requires(req.extras)[::-1]
+            requirements.extend(new_requirements)
+
+            # Register the new requirements needed by req
+            for new_requirement in new_requirements:
+                required_by[new_requirement].add(req.project_name)
+                req_extras[new_requirement] = req.extras
+
+            processed[req] = True
+
+        # return list of distros to activate
+        return to_activate
+
+    def find_plugins(
+            self, plugin_env, full_env=None, installer=None, fallback=True):
+        """Find all activatable distributions in `plugin_env`
+
+        Example usage::
+
+            distributions, errors = working_set.find_plugins(
+                Environment(plugin_dirlist)
+            )
+            # add plugins+libs to sys.path
+            map(working_set.add, distributions)
+            # display errors
+            print('Could not load', errors)
+
+        The `plugin_env` should be an ``Environment`` instance that contains
+        only distributions that are in the project's "plugin directory" or
+        directories. The `full_env`, if supplied, should be an ``Environment``
+        contains all currently-available distributions.  If `full_env` is not
+        supplied, one is created automatically from the ``WorkingSet`` this
+        method is called on, which will typically mean that every directory on
+        ``sys.path`` will be scanned for distributions.
+
+        `installer` is a standard installer callback as used by the
+        ``resolve()`` method. The `fallback` flag indicates whether we should
+        attempt to resolve older versions of a plugin if the newest version
+        cannot be resolved.
+
+        This method returns a 2-tuple: (`distributions`, `error_info`), where
+        `distributions` is a list of the distributions found in `plugin_env`
+        that were loadable, along with any other distributions that are needed
+        to resolve their dependencies.  `error_info` is a dictionary mapping
+        unloadable plugin distributions to an exception instance describing the
+        error that occurred. Usually this will be a ``DistributionNotFound`` or
+        ``VersionConflict`` instance.
+        """
+
+        plugin_projects = list(plugin_env)
+        # scan project names in alphabetic order
+        plugin_projects.sort()
+
+        error_info = {}
+        distributions = {}
+
+        if full_env is None:
+            env = Environment(self.entries)
+            env += plugin_env
+        else:
+            env = full_env + plugin_env
+
+        shadow_set = self.__class__([])
+        # put all our entries in shadow_set
+        list(map(shadow_set.add, self))
+
+        for project_name in plugin_projects:
+
+            for dist in plugin_env[project_name]:
+
+                req = [dist.as_requirement()]
+
+                try:
+                    resolvees = shadow_set.resolve(req, env, installer)
+
+                except ResolutionError as v:
+                    # save error info
+                    error_info[dist] = v
+                    if fallback:
+                        # try the next older version of project
+                        continue
+                    else:
+                        # give up on this project, keep going
+                        break
+
+                else:
+                    list(map(shadow_set.add, resolvees))
+                    distributions.update(dict.fromkeys(resolvees))
+
+                    # success, no need to try any more versions of this project
+                    break
+
+        distributions = list(distributions)
+        distributions.sort()
+
+        return distributions, error_info
+
+    def require(self, *requirements):
+        """Ensure that distributions matching `requirements` are activated
+
+        `requirements` must be a string or a (possibly-nested) sequence
+        thereof, specifying the distributions and versions required.  The
+        return value is a sequence of the distributions that needed to be
+        activated to fulfill the requirements; all relevant distributions are
+        included, even if they were already activated in this working set.
+        """
+        needed = self.resolve(parse_requirements(requirements))
+
+        for dist in needed:
+            self.add(dist)
+
+        return needed
+
+    def subscribe(self, callback, existing=True):
+        """Invoke `callback` for all distributions
+
+        If `existing=True` (default),
+        call on all existing ones, as well.
+        """
+        if callback in self.callbacks:
+            return
+        self.callbacks.append(callback)
+        if not existing:
+            return
+        for dist in self:
+            callback(dist)
+
+    def _added_new(self, dist):
+        for callback in self.callbacks:
+            callback(dist)
+
+    def __getstate__(self):
+        return (
+            self.entries[:], self.entry_keys.copy(), self.by_key.copy(),
+            self.callbacks[:]
+        )
+
+    def __setstate__(self, e_k_b_c):
+        entries, keys, by_key, callbacks = e_k_b_c
+        self.entries = entries[:]
+        self.entry_keys = keys.copy()
+        self.by_key = by_key.copy()
+        self.callbacks = callbacks[:]
+
+
+class _ReqExtras(dict):
+    """
+    Map each requirement to the extras that demanded it.
+    """
+
+    def markers_pass(self, req, extras=None):
+        """
+        Evaluate markers for req against each extra that
+        demanded it.
+
+        Return False if the req has a marker and fails
+        evaluation. Otherwise, return True.
+        """
+        extra_evals = (
+            req.marker.evaluate({'extra': extra})
+            for extra in self.get(req, ()) + (extras or (None,))
+        )
+        return not req.marker or any(extra_evals)
+
+
+class Environment:
+    """Searchable snapshot of distributions on a search path"""
+
+    def __init__(
+            self, search_path=None, platform=get_supported_platform(),
+            python=PY_MAJOR):
+        """Snapshot distributions available on a search path
+
+        Any distributions found on `search_path` are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.
+
+        `platform` is an optional string specifying the name of the platform
+        that platform-specific distributions must be compatible with.  If
+        unspecified, it defaults to the current platform.  `python` is an
+        optional string naming the desired version of Python (e.g. ``'3.6'``);
+        it defaults to the current version.
+
+        You may explicitly set `platform` (and/or `python`) to ``None`` if you
+        wish to map *all* distributions, not just those compatible with the
+        running platform or Python version.
+        """
+        self._distmap = {}
+        self.platform = platform
+        self.python = python
+        self.scan(search_path)
+
+    def can_add(self, dist):
+        """Is distribution `dist` acceptable for this environment?
+
+        The distribution must match the platform and python version
+        requirements specified when this environment was created, or False
+        is returned.
+        """
+        py_compat = (
+            self.python is None
+            or dist.py_version is None
+            or dist.py_version == self.python
+        )
+        return py_compat and compatible_platforms(dist.platform, self.platform)
+
+    def remove(self, dist):
+        """Remove `dist` from the environment"""
+        self._distmap[dist.key].remove(dist)
+
+    def scan(self, search_path=None):
+        """Scan `search_path` for distributions usable in this environment
+
+        Any distributions found are added to the environment.
+        `search_path` should be a sequence of ``sys.path`` items.  If not
+        supplied, ``sys.path`` is used.  Only distributions conforming to
+        the platform/python version defined at initialization are added.
+        """
+        if search_path is None:
+            search_path = sys.path
+
+        for item in search_path:
+            for dist in find_distributions(item):
+                self.add(dist)
+
+    def __getitem__(self, project_name):
+        """Return a newest-to-oldest list of distributions for `project_name`
+
+        Uses case-insensitive `project_name` comparison, assuming all the
+        project's distributions use their project's name converted to all
+        lowercase as their key.
+
+        """
+        distribution_key = project_name.lower()
+        return self._distmap.get(distribution_key, [])
+
+    def add(self, dist):
+        """Add `dist` if we ``can_add()`` it and it has not already been added
+        """
+        if self.can_add(dist) and dist.has_version():
+            dists = self._distmap.setdefault(dist.key, [])
+            if dist not in dists:
+                dists.append(dist)
+                dists.sort(key=operator.attrgetter('hashcmp'), reverse=True)
+
+    def best_match(
+            self, req, working_set, installer=None, replace_conflicting=False):
+        """Find distribution best matching `req` and usable on `working_set`
+
+        This calls the ``find(req)`` method of the `working_set` to see if a
+        suitable distribution is already active.  (This may raise
+        ``VersionConflict`` if an unsuitable version of the project is already
+        active in the specified `working_set`.)  If a suitable distribution
+        isn't active, this method returns the newest distribution in the
+        environment that meets the ``Requirement`` in `req`.  If no suitable
+        distribution is found, and `installer` is supplied, then the result of
+        calling the environment's ``obtain(req, installer)`` method will be
+        returned.
+        """
+        try:
+            dist = working_set.find(req)
+        except VersionConflict:
+            if not replace_conflicting:
+                raise
+            dist = None
+        if dist is not None:
+            return dist
+        for dist in self[req.key]:
+            if dist in req:
+                return dist
+        # try to download/install
+        return self.obtain(req, installer)
+
+    def obtain(self, requirement, installer=None):
+        """Obtain a distribution matching `requirement` (e.g. via download)
+
+        Obtain a distro that matches requirement (e.g. via download).  In the
+        base ``Environment`` class, this routine just returns
+        ``installer(requirement)``, unless `installer` is None, in which case
+        None is returned instead.  This method is a hook that allows subclasses
+        to attempt other ways of obtaining a distribution before falling back
+        to the `installer` argument."""
+        if installer is not None:
+            return installer(requirement)
+
+    def __iter__(self):
+        """Yield the unique project names of the available distributions"""
+        for key in self._distmap.keys():
+            if self[key]:
+                yield key
+
+    def __iadd__(self, other):
+        """In-place addition of a distribution or environment"""
+        if isinstance(other, Distribution):
+            self.add(other)
+        elif isinstance(other, Environment):
+            for project in other:
+                for dist in other[project]:
+                    self.add(dist)
+        else:
+            raise TypeError("Can't add %r to environment" % (other,))
+        return self
+
+    def __add__(self, other):
+        """Add an environment or distribution to an environment"""
+        new = self.__class__([], platform=None, python=None)
+        for env in self, other:
+            new += env
+        return new
+
+
+# XXX backward compatibility
+AvailableDistributions = Environment
+
+
+class ExtractionError(RuntimeError):
+    """An error occurred extracting a resource
+
+    The following attributes are available from instances of this exception:
+
+    manager
+        The resource manager that raised this exception
+
+    cache_path
+        The base directory for resource extraction
+
+    original_error
+        The exception instance that caused extraction to fail
+    """
+
+
+class ResourceManager:
+    """Manage resource extraction and packages"""
+    extraction_path = None
+
+    def __init__(self):
+        self.cached_files = {}
+
+    def resource_exists(self, package_or_requirement, resource_name):
+        """Does the named resource exist?"""
+        return get_provider(package_or_requirement).has_resource(resource_name)
+
+    def resource_isdir(self, package_or_requirement, resource_name):
+        """Is the named resource an existing directory?"""
+        return get_provider(package_or_requirement).resource_isdir(
+            resource_name
+        )
+
+    def resource_filename(self, package_or_requirement, resource_name):
+        """Return a true filesystem path for specified resource"""
+        return get_provider(package_or_requirement).get_resource_filename(
+            self, resource_name
+        )
+
+    def resource_stream(self, package_or_requirement, resource_name):
+        """Return a readable file-like object for specified resource"""
+        return get_provider(package_or_requirement).get_resource_stream(
+            self, resource_name
+        )
+
+    def resource_string(self, package_or_requirement, resource_name):
+        """Return specified resource as a string"""
+        return get_provider(package_or_requirement).get_resource_string(
+            self, resource_name
+        )
+
+    def resource_listdir(self, package_or_requirement, resource_name):
+        """List the contents of the named resource directory"""
+        return get_provider(package_or_requirement).resource_listdir(
+            resource_name
+        )
+
+    def extraction_error(self):
+        """Give an error message for problems extracting file(s)"""
+
+        old_exc = sys.exc_info()[1]
+        cache_path = self.extraction_path or get_default_cache()
+
+        tmpl = textwrap.dedent("""
+            Can't extract file(s) to egg cache
+
+            The following error occurred while trying to extract file(s)
+            to the Python egg cache:
+
+              {old_exc}
+
+            The Python egg cache directory is currently set to:
+
+              {cache_path}
+
+            Perhaps your account does not have write access to this directory?
+            You can change the cache directory by setting the PYTHON_EGG_CACHE
+            environment variable to point to an accessible directory.
+            """).lstrip()
+        err = ExtractionError(tmpl.format(**locals()))
+        err.manager = self
+        err.cache_path = cache_path
+        err.original_error = old_exc
+        raise err
+
+    def get_cache_path(self, archive_name, names=()):
+        """Return absolute location in cache for `archive_name` and `names`
+
+        The parent directory of the resulting path will be created if it does
+        not already exist.  `archive_name` should be the base filename of the
+        enclosing egg (which may not be the name of the enclosing zipfile!),
+        including its ".egg" extension.  `names`, if provided, should be a
+        sequence of path name parts "under" the egg's extraction location.
+
+        This method should only be called by resource providers that need to
+        obtain an extraction location, and only for names they intend to
+        extract, as it tracks the generated names for possible cleanup later.
+        """
+        extract_path = self.extraction_path or get_default_cache()
+        target_path = os.path.join(extract_path, archive_name + '-tmp', *names)
+        try:
+            _bypass_ensure_directory(target_path)
+        except Exception:
+            self.extraction_error()
+
+        self._warn_unsafe_extraction_path(extract_path)
+
+        self.cached_files[target_path] = 1
+        return target_path
+
+    @staticmethod
+    def _warn_unsafe_extraction_path(path):
+        """
+        If the default extraction path is overridden and set to an insecure
+        location, such as /tmp, it opens up an opportunity for an attacker to
+        replace an extracted file with an unauthorized payload. Warn the user
+        if a known insecure location is used.
+
+        See Distribute #375 for more details.
+        """
+        if os.name == 'nt' and not path.startswith(os.environ['windir']):
+            # On Windows, permissions are generally restrictive by default
+            #  and temp directories are not writable by other users, so
+            #  bypass the warning.
+            return
+        mode = os.stat(path).st_mode
+        if mode & stat.S_IWOTH or mode & stat.S_IWGRP:
+            msg = (
+                "%s is writable by group/others and vulnerable to attack "
+                "when "
+                "used with get_resource_filename. Consider a more secure "
+                "location (set with .set_extraction_path or the "
+                "PYTHON_EGG_CACHE environment variable)." % path
+            )
+            warnings.warn(msg, UserWarning)
+
+    def postprocess(self, tempname, filename):
+        """Perform any platform-specific postprocessing of `tempname`
+
+        This is where Mac header rewrites should be done; other platforms don't
+        have anything special they should do.
+
+        Resource providers should call this method ONLY after successfully
+        extracting a compressed resource.  They must NOT call it on resources
+        that are already in the filesystem.
+
+        `tempname` is the current (temporary) name of the file, and `filename`
+        is the name it will be renamed to by the caller after this routine
+        returns.
+        """
+
+        if os.name == 'posix':
+            # Make the resource executable
+            mode = ((os.stat(tempname).st_mode) | 0o555) & 0o7777
+            os.chmod(tempname, mode)
+
+    def set_extraction_path(self, path):
+        """Set the base path where resources will be extracted to, if needed.
+
+        If you do not call this routine before any extractions take place, the
+        path defaults to the return value of ``get_default_cache()``.  (Which
+        is based on the ``PYTHON_EGG_CACHE`` environment variable, with various
+        platform-specific fallbacks.  See that routine's documentation for more
+        details.)
+
+        Resources are extracted to subdirectories of this path based upon
+        information given by the ``IResourceProvider``.  You may set this to a
+        temporary directory, but then you must call ``cleanup_resources()`` to
+        delete the extracted files when done.  There is no guarantee that
+        ``cleanup_resources()`` will be able to remove all extracted files.
+
+        (Note: you may not change the extraction path for a given resource
+        manager once resources have been extracted, unless you first call
+        ``cleanup_resources()``.)
+        """
+        if self.cached_files:
+            raise ValueError(
+                "Can't change extraction path, files already extracted"
+            )
+
+        self.extraction_path = path
+
+    def cleanup_resources(self, force=False):
+        """
+        Delete all extracted resource files and directories, returning a list
+        of the file and directory names that could not be successfully removed.
+        This function does not have any concurrency protection, so it should
+        generally only be called when the extraction path is a temporary
+        directory exclusive to a single process.  This method is not
+        automatically called; you must call it explicitly or register it as an
+        ``atexit`` function if you wish to ensure cleanup of a temporary
+        directory used for extractions.
+        """
+        # XXX
+
+
+def get_default_cache():
+    """
+    Return the ``PYTHON_EGG_CACHE`` environment variable
+    or a platform-relevant user cache dir for an app
+    named "Python-Eggs".
+    """
+    return (
+        os.environ.get('PYTHON_EGG_CACHE')
+        or appdirs.user_cache_dir(appname='Python-Eggs')
+    )
+
+
+def safe_name(name):
+    """Convert an arbitrary string to a standard distribution name
+
+    Any runs of non-alphanumeric/. characters are replaced with a single '-'.
+    """
+    return re.sub('[^A-Za-z0-9.]+', '-', name)
+
+
+def safe_version(version):
+    """
+    Convert an arbitrary string to a standard version string
+    """
+    try:
+        # normalize the version
+        return str(packaging.version.Version(version))
+    except packaging.version.InvalidVersion:
+        version = version.replace(' ', '.')
+        return re.sub('[^A-Za-z0-9.]+', '-', version)
+
+
+def safe_extra(extra):
+    """Convert an arbitrary string to a standard 'extra' name
+
+    Any runs of non-alphanumeric characters are replaced with a single '_',
+    and the result is always lowercased.
+    """
+    return re.sub('[^A-Za-z0-9.-]+', '_', extra).lower()
+
+
+def to_filename(name):
+    """Convert a project or version name to its filename-escaped form
+
+    Any '-' characters are currently replaced with '_'.
+    """
+    return name.replace('-', '_')
+
+
+def invalid_marker(text):
+    """
+    Validate text as a PEP 508 environment marker; return an exception
+    if invalid or False otherwise.
+    """
+    try:
+        evaluate_marker(text)
+    except SyntaxError as e:
+        e.filename = None
+        e.lineno = None
+        return e
+    return False
+
+
+def evaluate_marker(text, extra=None):
+    """
+    Evaluate a PEP 508 environment marker.
+    Return a boolean indicating the marker result in this environment.
+    Raise SyntaxError if marker is invalid.
+
+    This implementation uses the 'pyparsing' module.
+    """
+    try:
+        marker = packaging.markers.Marker(text)
+        return marker.evaluate()
+    except packaging.markers.InvalidMarker as e:
+        raise SyntaxError(e)
+
+
+class NullProvider:
+    """Try to implement resources and metadata for arbitrary PEP 302 loaders"""
+
+    egg_name = None
+    egg_info = None
+    loader = None
+
+    def __init__(self, module):
+        self.loader = getattr(module, '__loader__', None)
+        self.module_path = os.path.dirname(getattr(module, '__file__', ''))
+
+    def get_resource_filename(self, manager, resource_name):
+        return self._fn(self.module_path, resource_name)
+
+    def get_resource_stream(self, manager, resource_name):
+        return io.BytesIO(self.get_resource_string(manager, resource_name))
+
+    def get_resource_string(self, manager, resource_name):
+        return self._get(self._fn(self.module_path, resource_name))
+
+    def has_resource(self, resource_name):
+        return self._has(self._fn(self.module_path, resource_name))
+
+    def _get_metadata_path(self, name):
+        return self._fn(self.egg_info, name)
+
+    def has_metadata(self, name):
+        if not self.egg_info:
+            return self.egg_info
+
+        path = self._get_metadata_path(name)
+        return self._has(path)
+
+    def get_metadata(self, name):
+        if not self.egg_info:
+            return ""
+        path = self._get_metadata_path(name)
+        value = self._get(path)
+        if six.PY2:
+            return value
+        try:
+            return value.decode('utf-8')
+        except UnicodeDecodeError as exc:
+            # Include the path in the error message to simplify
+            # troubleshooting, and without changing the exception type.
+            exc.reason += ' in {} file at path: {}'.format(name, path)
+            raise
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+    def resource_isdir(self, resource_name):
+        return self._isdir(self._fn(self.module_path, resource_name))
+
+    def metadata_isdir(self, name):
+        return self.egg_info and self._isdir(self._fn(self.egg_info, name))
+
+    def resource_listdir(self, resource_name):
+        return self._listdir(self._fn(self.module_path, resource_name))
+
+    def metadata_listdir(self, name):
+        if self.egg_info:
+            return self._listdir(self._fn(self.egg_info, name))
+        return []
+
+    def run_script(self, script_name, namespace):
+        script = 'scripts/' + script_name
+        if not self.has_metadata(script):
+            raise ResolutionError(
+                "Script {script!r} not found in metadata at {self.egg_info!r}"
+                .format(**locals()),
+            )
+        script_text = self.get_metadata(script).replace('\r\n', '\n')
+        script_text = script_text.replace('\r', '\n')
+        script_filename = self._fn(self.egg_info, script)
+        namespace['__file__'] = script_filename
+        if os.path.exists(script_filename):
+            source = open(script_filename).read()
+            code = compile(source, script_filename, 'exec')
+            exec(code, namespace, namespace)
+        else:
+            from linecache import cache
+            cache[script_filename] = (
+                len(script_text), 0, script_text.split('\n'), script_filename
+            )
+            script_code = compile(script_text, script_filename, 'exec')
+            exec(script_code, namespace, namespace)
+
+    def _has(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _isdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _listdir(self, path):
+        raise NotImplementedError(
+            "Can't perform this operation for unregistered loader type"
+        )
+
+    def _fn(self, base, resource_name):
+        self._validate_resource_path(resource_name)
+        if resource_name:
+            return os.path.join(base, *resource_name.split('/'))
+        return base
+
+    @staticmethod
+    def _validate_resource_path(path):
+        """
+        Validate the resource paths according to the docs.
+        https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
+
+        >>> warned = getfixture('recwarn')
+        >>> warnings.simplefilter('always')
+        >>> vrp = NullProvider._validate_resource_path
+        >>> vrp('foo/bar.txt')
+        >>> bool(warned)
+        False
+        >>> vrp('../foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('/foo/bar.txt')
+        >>> bool(warned)
+        True
+        >>> vrp('foo/../../bar.txt')
+        >>> bool(warned)
+        True
+        >>> warned.clear()
+        >>> vrp('foo/f../bar.txt')
+        >>> bool(warned)
+        False
+
+        Windows path separators are straight-up disallowed.
+        >>> vrp(r'\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        >>> vrp(r'C:\\foo/bar.txt')
+        Traceback (most recent call last):
+        ...
+        ValueError: Use of .. or absolute path in a resource path \
+is not allowed.
+
+        Blank values are allowed
+
+        >>> vrp('')
+        >>> bool(warned)
+        False
+
+        Non-string values are not.
+
+        >>> vrp(None)
+        Traceback (most recent call last):
+        ...
+        AttributeError: ...
+        """
+        invalid = (
+            os.path.pardir in path.split(posixpath.sep) or
+            posixpath.isabs(path) or
+            ntpath.isabs(path)
+        )
+        if not invalid:
+            return
+
+        msg = "Use of .. or absolute path in a resource path is not allowed."
+
+        # Aggressively disallow Windows absolute paths
+        if ntpath.isabs(path) and not posixpath.isabs(path):
+            raise ValueError(msg)
+
+        # for compatibility, warn; in future
+        # raise ValueError(msg)
+        warnings.warn(
+            msg[:-1] + " and will raise exceptions in a future release.",
+            DeprecationWarning,
+            stacklevel=4,
+        )
+
+    def _get(self, path):
+        if hasattr(self.loader, 'get_data'):
+            return self.loader.get_data(path)
+        raise NotImplementedError(
+            "Can't perform this operation for loaders without 'get_data()'"
+        )
+
+
+register_loader_type(object, NullProvider)
+
+
+class EggProvider(NullProvider):
+    """Provider based on a virtual filesystem"""
+
+    def __init__(self, module):
+        NullProvider.__init__(self, module)
+        self._setup_prefix()
+
+    def _setup_prefix(self):
+        # we assume here that our metadata may be nested inside a "basket"
+        # of multiple eggs; that's why we use module_path instead of .archive
+        path = self.module_path
+        old = None
+        while path != old:
+            if _is_egg_path(path):
+                self.egg_name = os.path.basename(path)
+                self.egg_info = os.path.join(path, 'EGG-INFO')
+                self.egg_root = path
+                break
+            old = path
+            path, base = os.path.split(path)
+
+
+class DefaultProvider(EggProvider):
+    """Provides access to package resources in the filesystem"""
+
+    def _has(self, path):
+        return os.path.exists(path)
+
+    def _isdir(self, path):
+        return os.path.isdir(path)
+
+    def _listdir(self, path):
+        return os.listdir(path)
+
+    def get_resource_stream(self, manager, resource_name):
+        return open(self._fn(self.module_path, resource_name), 'rb')
+
+    def _get(self, path):
+        with open(path, 'rb') as stream:
+            return stream.read()
+
+    @classmethod
+    def _register(cls):
+        loader_names = 'SourceFileLoader', 'SourcelessFileLoader',
+        for name in loader_names:
+            loader_cls = getattr(importlib_machinery, name, type(None))
+            register_loader_type(loader_cls, cls)
+
+
+DefaultProvider._register()
+
+
+class EmptyProvider(NullProvider):
+    """Provider that returns nothing for all requests"""
+
+    module_path = None
+
+    _isdir = _has = lambda self, path: False
+
+    def _get(self, path):
+        return ''
+
+    def _listdir(self, path):
+        return []
+
+    def __init__(self):
+        pass
+
+
+empty_provider = EmptyProvider()
+
+
+class ZipManifests(dict):
+    """
+    zip manifest builder
+    """
+
+    @classmethod
+    def build(cls, path):
+        """
+        Build a dictionary similar to the zipimport directory
+        caches, except instead of tuples, store ZipInfo objects.
+
+        Use a platform-specific path separator (os.sep) for the path keys
+        for compatibility with pypy on Windows.
+        """
+        with zipfile.ZipFile(path) as zfile:
+            items = (
+                (
+                    name.replace('/', os.sep),
+                    zfile.getinfo(name),
+                )
+                for name in zfile.namelist()
+            )
+            return dict(items)
+
+    load = build
+
+
+class MemoizedZipManifests(ZipManifests):
+    """
+    Memoized zipfile manifests.
+    """
+    manifest_mod = collections.namedtuple('manifest_mod', 'manifest mtime')
+
+    def load(self, path):
+        """
+        Load a manifest at path or return a suitable manifest already loaded.
+        """
+        path = os.path.normpath(path)
+        mtime = os.stat(path).st_mtime
+
+        if path not in self or self[path].mtime != mtime:
+            manifest = self.build(path)
+            self[path] = self.manifest_mod(manifest, mtime)
+
+        return self[path].manifest
+
+
+class ZipProvider(EggProvider):
+    """Resource support for zips and eggs"""
+
+    eagers = None
+    _zip_manifests = MemoizedZipManifests()
+
+    def __init__(self, module):
+        EggProvider.__init__(self, module)
+        self.zip_pre = self.loader.archive + os.sep
+
+    def _zipinfo_name(self, fspath):
+        # Convert a virtual filename (full path to file) into a zipfile subpath
+        # usable with the zipimport directory cache for our target archive
+        fspath = fspath.rstrip(os.sep)
+        if fspath == self.loader.archive:
+            return ''
+        if fspath.startswith(self.zip_pre):
+            return fspath[len(self.zip_pre):]
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.zip_pre)
+        )
+
+    def _parts(self, zip_path):
+        # Convert a zipfile subpath into an egg-relative path part list.
+        # pseudo-fs path
+        fspath = self.zip_pre + zip_path
+        if fspath.startswith(self.egg_root + os.sep):
+            return fspath[len(self.egg_root) + 1:].split(os.sep)
+        raise AssertionError(
+            "%s is not a subpath of %s" % (fspath, self.egg_root)
+        )
+
+    @property
+    def zipinfo(self):
+        return self._zip_manifests.load(self.loader.archive)
+
+    def get_resource_filename(self, manager, resource_name):
+        if not self.egg_name:
+            raise NotImplementedError(
+                "resource_filename() only supported for .egg, not .zip"
+            )
+        # no need to lock for extraction, since we use temp names
+        zip_path = self._resource_to_zip(resource_name)
+        eagers = self._get_eager_resources()
+        if '/'.join(self._parts(zip_path)) in eagers:
+            for name in eagers:
+                self._extract_resource(manager, self._eager_to_zip(name))
+        return self._extract_resource(manager, zip_path)
+
+    @staticmethod
+    def _get_date_and_size(zip_stat):
+        size = zip_stat.file_size
+        # ymdhms+wday, yday, dst
+        date_time = zip_stat.date_time + (0, 0, -1)
+        # 1980 offset already done
+        timestamp = time.mktime(date_time)
+        return timestamp, size
+
+    def _extract_resource(self, manager, zip_path):
+
+        if zip_path in self._index():
+            for name in self._index()[zip_path]:
+                last = self._extract_resource(
+                    manager, os.path.join(zip_path, name)
+                )
+            # return the extracted directory name
+            return os.path.dirname(last)
+
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+
+        if not WRITE_SUPPORT:
+            raise IOError('"os.rename" and "os.unlink" are not supported '
+                          'on this platform')
+        try:
+
+            real_path = manager.get_cache_path(
+                self.egg_name, self._parts(zip_path)
+            )
+
+            if self._is_current(real_path, zip_path):
+                return real_path
+
+            outf, tmpnam = _mkstemp(
+                ".$extract",
+                dir=os.path.dirname(real_path),
+            )
+            os.write(outf, self.loader.get_data(zip_path))
+            os.close(outf)
+            utime(tmpnam, (timestamp, timestamp))
+            manager.postprocess(tmpnam, real_path)
+
+            try:
+                rename(tmpnam, real_path)
+
+            except os.error:
+                if os.path.isfile(real_path):
+                    if self._is_current(real_path, zip_path):
+                        # the file became current since it was checked above,
+                        #  so proceed.
+                        return real_path
+                    # Windows, del old file and retry
+                    elif os.name == 'nt':
+                        unlink(real_path)
+                        rename(tmpnam, real_path)
+                        return real_path
+                raise
+
+        except os.error:
+            # report a user-friendly error
+            manager.extraction_error()
+
+        return real_path
+
+    def _is_current(self, file_path, zip_path):
+        """
+        Return True if the file_path is current for this zip_path
+        """
+        timestamp, size = self._get_date_and_size(self.zipinfo[zip_path])
+        if not os.path.isfile(file_path):
+            return False
+        stat = os.stat(file_path)
+        if stat.st_size != size or stat.st_mtime != timestamp:
+            return False
+        # check that the contents match
+        zip_contents = self.loader.get_data(zip_path)
+        with open(file_path, 'rb') as f:
+            file_contents = f.read()
+        return zip_contents == file_contents
+
+    def _get_eager_resources(self):
+        if self.eagers is None:
+            eagers = []
+            for name in ('native_libs.txt', 'eager_resources.txt'):
+                if self.has_metadata(name):
+                    eagers.extend(self.get_metadata_lines(name))
+            self.eagers = eagers
+        return self.eagers
+
+    def _index(self):
+        try:
+            return self._dirindex
+        except AttributeError:
+            ind = {}
+            for path in self.zipinfo:
+                parts = path.split(os.sep)
+                while parts:
+                    parent = os.sep.join(parts[:-1])
+                    if parent in ind:
+                        ind[parent].append(parts[-1])
+                        break
+                    else:
+                        ind[parent] = [parts.pop()]
+            self._dirindex = ind
+            return ind
+
+    def _has(self, fspath):
+        zip_path = self._zipinfo_name(fspath)
+        return zip_path in self.zipinfo or zip_path in self._index()
+
+    def _isdir(self, fspath):
+        return self._zipinfo_name(fspath) in self._index()
+
+    def _listdir(self, fspath):
+        return list(self._index().get(self._zipinfo_name(fspath), ()))
+
+    def _eager_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.egg_root, resource_name))
+
+    def _resource_to_zip(self, resource_name):
+        return self._zipinfo_name(self._fn(self.module_path, resource_name))
+
+
+register_loader_type(zipimport.zipimporter, ZipProvider)
+
+
+class FileMetadata(EmptyProvider):
+    """Metadata handler for standalone PKG-INFO files
+
+    Usage::
+
+        metadata = FileMetadata("/path/to/PKG-INFO")
+
+    This provider rejects all data and metadata requests except for PKG-INFO,
+    which is treated as existing, and will be the contents of the file at
+    the provided location.
+    """
+
+    def __init__(self, path):
+        self.path = path
+
+    def _get_metadata_path(self, name):
+        return self.path
+
+    def has_metadata(self, name):
+        return name == 'PKG-INFO' and os.path.isfile(self.path)
+
+    def get_metadata(self, name):
+        if name != 'PKG-INFO':
+            raise KeyError("No metadata except PKG-INFO is available")
+
+        with io.open(self.path, encoding='utf-8', errors="replace") as f:
+            metadata = f.read()
+        self._warn_on_replacement(metadata)
+        return metadata
+
+    def _warn_on_replacement(self, metadata):
+        # Python 2.7 compat for: replacement_char = '�'
+        replacement_char = b'\xef\xbf\xbd'.decode('utf-8')
+        if replacement_char in metadata:
+            tmpl = "{self.path} could not be properly decoded in UTF-8"
+            msg = tmpl.format(**locals())
+            warnings.warn(msg)
+
+    def get_metadata_lines(self, name):
+        return yield_lines(self.get_metadata(name))
+
+
+class PathMetadata(DefaultProvider):
+    """Metadata provider for egg directories
+
+    Usage::
+
+        # Development eggs:
+
+        egg_info = "/path/to/PackageName.egg-info"
+        base_dir = os.path.dirname(egg_info)
+        metadata = PathMetadata(base_dir, egg_info)
+        dist_name = os.path.splitext(os.path.basename(egg_info))[0]
+        dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
+
+        # Unpacked egg directories:
+
+        egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
+        metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
+        dist = Distribution.from_filename(egg_path, metadata=metadata)
+    """
+
+    def __init__(self, path, egg_info):
+        self.module_path = path
+        self.egg_info = egg_info
+
+
+class EggMetadata(ZipProvider):
+    """Metadata provider for .egg files"""
+
+    def __init__(self, importer):
+        """Create a metadata provider from a zipimporter"""
+
+        self.zip_pre = importer.archive + os.sep
+        self.loader = importer
+        if importer.prefix:
+            self.module_path = os.path.join(importer.archive, importer.prefix)
+        else:
+            self.module_path = importer.archive
+        self._setup_prefix()
+
+
+_declare_state('dict', _distribution_finders={})
+
+
+def register_finder(importer_type, distribution_finder):
+    """Register `distribution_finder` to find distributions in sys.path items
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `distribution_finder` is a callable that, passed a path
+    item and the importer instance, yields ``Distribution`` instances found on
+    that path item.  See ``pkg_resources.find_on_path`` for an example."""
+    _distribution_finders[importer_type] = distribution_finder
+
+
+def find_distributions(path_item, only=False):
+    """Yield distributions accessible via `path_item`"""
+    importer = get_importer(path_item)
+    finder = _find_adapter(_distribution_finders, importer)
+    return finder(importer, path_item, only)
+
+
+def find_eggs_in_zip(importer, path_item, only=False):
+    """
+    Find eggs in zip files; possibly multiple nested eggs.
+    """
+    if importer.archive.endswith('.whl'):
+        # wheels are not supported with this finder
+        # they don't have PKG-INFO metadata, and won't ever contain eggs
+        return
+    metadata = EggMetadata(importer)
+    if metadata.has_metadata('PKG-INFO'):
+        yield Distribution.from_filename(path_item, metadata=metadata)
+    if only:
+        # don't yield nested distros
+        return
+    for subitem in metadata.resource_listdir(''):
+        if _is_egg_path(subitem):
+            subpath = os.path.join(path_item, subitem)
+            dists = find_eggs_in_zip(zipimport.zipimporter(subpath), subpath)
+            for dist in dists:
+                yield dist
+        elif subitem.lower().endswith('.dist-info'):
+            subpath = os.path.join(path_item, subitem)
+            submeta = EggMetadata(zipimport.zipimporter(subpath))
+            submeta.egg_info = subpath
+            yield Distribution.from_location(path_item, subitem, submeta)
+
+
+register_finder(zipimport.zipimporter, find_eggs_in_zip)
+
+
+def find_nothing(importer, path_item, only=False):
+    return ()
+
+
+register_finder(object, find_nothing)
+
+
+def _by_version_descending(names):
+    """
+    Given a list of filenames, return them in descending order
+    by version number.
+
+    >>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
+    >>> _by_version_descending(names)
+    ['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
+    >>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
+    >>> _by_version_descending(names)
+    ['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
+    """
+    def _by_version(name):
+        """
+        Parse each component of the filename
+        """
+        name, ext = os.path.splitext(name)
+        parts = itertools.chain(name.split('-'), [ext])
+        return [packaging.version.parse(part) for part in parts]
+
+    return sorted(names, key=_by_version, reverse=True)
+
+
+def find_on_path(importer, path_item, only=False):
+    """Yield distributions accessible on a sys.path directory"""
+    path_item = _normalize_cached(path_item)
+
+    if _is_unpacked_egg(path_item):
+        yield Distribution.from_filename(
+            path_item, metadata=PathMetadata(
+                path_item, os.path.join(path_item, 'EGG-INFO')
+            )
+        )
+        return
+
+    entries = safe_listdir(path_item)
+
+    # for performance, before sorting by version,
+    # screen entries for only those that will yield
+    # distributions
+    filtered = (
+        entry
+        for entry in entries
+        if dist_factory(path_item, entry, only)
+    )
+
+    # scan for .egg and .egg-info in directory
+    path_item_entries = _by_version_descending(filtered)
+    for entry in path_item_entries:
+        fullpath = os.path.join(path_item, entry)
+        factory = dist_factory(path_item, entry, only)
+        for dist in factory(fullpath):
+            yield dist
+
+
+def dist_factory(path_item, entry, only):
+    """
+    Return a dist_factory for a path_item and entry
+    """
+    lower = entry.lower()
+    is_meta = any(map(lower.endswith, ('.egg-info', '.dist-info')))
+    return (
+        distributions_from_metadata
+        if is_meta else
+        find_distributions
+        if not only and _is_egg_path(entry) else
+        resolve_egg_link
+        if not only and lower.endswith('.egg-link') else
+        NoDists()
+    )
+
+
+class NoDists:
+    """
+    >>> bool(NoDists())
+    False
+
+    >>> list(NoDists()('anything'))
+    []
+    """
+    def __bool__(self):
+        return False
+    if six.PY2:
+        __nonzero__ = __bool__
+
+    def __call__(self, fullpath):
+        return iter(())
+
+
+def safe_listdir(path):
+    """
+    Attempt to list contents of path, but suppress some exceptions.
+    """
+    try:
+        return os.listdir(path)
+    except (PermissionError, NotADirectoryError):
+        pass
+    except OSError as e:
+        # Ignore the directory if does not exist, not a directory or
+        # permission denied
+        ignorable = (
+            e.errno in (errno.ENOTDIR, errno.EACCES, errno.ENOENT)
+            # Python 2 on Windows needs to be handled this way :(
+            or getattr(e, "winerror", None) == 267
+        )
+        if not ignorable:
+            raise
+    return ()
+
+
+def distributions_from_metadata(path):
+    root = os.path.dirname(path)
+    if os.path.isdir(path):
+        if len(os.listdir(path)) == 0:
+            # empty metadata dir; skip
+            return
+        metadata = PathMetadata(root, path)
+    else:
+        metadata = FileMetadata(path)
+    entry = os.path.basename(path)
+    yield Distribution.from_location(
+        root, entry, metadata, precedence=DEVELOP_DIST,
+    )
+
+
+def non_empty_lines(path):
+    """
+    Yield non-empty lines from file at path
+    """
+    with open(path) as f:
+        for line in f:
+            line = line.strip()
+            if line:
+                yield line
+
+
+def resolve_egg_link(path):
+    """
+    Given a path to an .egg-link, resolve distributions
+    present in the referenced path.
+    """
+    referenced_paths = non_empty_lines(path)
+    resolved_paths = (
+        os.path.join(os.path.dirname(path), ref)
+        for ref in referenced_paths
+    )
+    dist_groups = map(find_distributions, resolved_paths)
+    return next(dist_groups, ())
+
+
+register_finder(pkgutil.ImpImporter, find_on_path)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_finder(importlib_machinery.FileFinder, find_on_path)
+
+_declare_state('dict', _namespace_handlers={})
+_declare_state('dict', _namespace_packages={})
+
+
+def register_namespace_handler(importer_type, namespace_handler):
+    """Register `namespace_handler` to declare namespace packages
+
+    `importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
+    handler), and `namespace_handler` is a callable like this::
+
+        def namespace_handler(importer, path_entry, moduleName, module):
+            # return a path_entry to use for child packages
+
+    Namespace handlers are only called if the importer object has already
+    agreed that it can handle the relevant path item, and they should only
+    return a subpath if the module __path__ does not already contain an
+    equivalent subpath.  For an example namespace handler, see
+    ``pkg_resources.file_ns_handler``.
+    """
+    _namespace_handlers[importer_type] = namespace_handler
+
+
+def _handle_ns(packageName, path_item):
+    """Ensure that named package includes a subpath of path_item (if needed)"""
+
+    importer = get_importer(path_item)
+    if importer is None:
+        return None
+
+    # capture warnings due to #1111
+    with warnings.catch_warnings():
+        warnings.simplefilter("ignore")
+        loader = importer.find_module(packageName)
+
+    if loader is None:
+        return None
+    module = sys.modules.get(packageName)
+    if module is None:
+        module = sys.modules[packageName] = types.ModuleType(packageName)
+        module.__path__ = []
+        _set_parent_ns(packageName)
+    elif not hasattr(module, '__path__'):
+        raise TypeError("Not a package:", packageName)
+    handler = _find_adapter(_namespace_handlers, importer)
+    subpath = handler(importer, path_item, packageName, module)
+    if subpath is not None:
+        path = module.__path__
+        path.append(subpath)
+        loader.load_module(packageName)
+        _rebuild_mod_path(path, packageName, module)
+    return subpath
+
+
+def _rebuild_mod_path(orig_path, package_name, module):
+    """
+    Rebuild module.__path__ ensuring that all entries are ordered
+    corresponding to their sys.path order
+    """
+    sys_path = [_normalize_cached(p) for p in sys.path]
+
+    def safe_sys_path_index(entry):
+        """
+        Workaround for #520 and #513.
+        """
+        try:
+            return sys_path.index(entry)
+        except ValueError:
+            return float('inf')
+
+    def position_in_sys_path(path):
+        """
+        Return the ordinal of the path based on its position in sys.path
+        """
+        path_parts = path.split(os.sep)
+        module_parts = package_name.count('.') + 1
+        parts = path_parts[:-module_parts]
+        return safe_sys_path_index(_normalize_cached(os.sep.join(parts)))
+
+    new_path = sorted(orig_path, key=position_in_sys_path)
+    new_path = [_normalize_cached(p) for p in new_path]
+
+    if isinstance(module.__path__, list):
+        module.__path__[:] = new_path
+    else:
+        module.__path__ = new_path
+
+
+def declare_namespace(packageName):
+    """Declare that package 'packageName' is a namespace package"""
+
+    _imp.acquire_lock()
+    try:
+        if packageName in _namespace_packages:
+            return
+
+        path = sys.path
+        parent, _, _ = packageName.rpartition('.')
+
+        if parent:
+            declare_namespace(parent)
+            if parent not in _namespace_packages:
+                __import__(parent)
+            try:
+                path = sys.modules[parent].__path__
+            except AttributeError:
+                raise TypeError("Not a package:", parent)
+
+        # Track what packages are namespaces, so when new path items are added,
+        # they can be updated
+        _namespace_packages.setdefault(parent or None, []).append(packageName)
+        _namespace_packages.setdefault(packageName, [])
+
+        for path_item in path:
+            # Ensure all the parent's path items are reflected in the child,
+            # if they apply
+            _handle_ns(packageName, path_item)
+
+    finally:
+        _imp.release_lock()
+
+
+def fixup_namespace_packages(path_item, parent=None):
+    """Ensure that previously-declared namespace packages include path_item"""
+    _imp.acquire_lock()
+    try:
+        for package in _namespace_packages.get(parent, ()):
+            subpath = _handle_ns(package, path_item)
+            if subpath:
+                fixup_namespace_packages(subpath, package)
+    finally:
+        _imp.release_lock()
+
+
+def file_ns_handler(importer, path_item, packageName, module):
+    """Compute an ns-package subpath for a filesystem or zipfile importer"""
+
+    subpath = os.path.join(path_item, packageName.split('.')[-1])
+    normalized = _normalize_cached(subpath)
+    for item in module.__path__:
+        if _normalize_cached(item) == normalized:
+            break
+    else:
+        # Only return the path if it's not already there
+        return subpath
+
+
+register_namespace_handler(pkgutil.ImpImporter, file_ns_handler)
+register_namespace_handler(zipimport.zipimporter, file_ns_handler)
+
+if hasattr(importlib_machinery, 'FileFinder'):
+    register_namespace_handler(importlib_machinery.FileFinder, file_ns_handler)
+
+
+def null_ns_handler(importer, path_item, packageName, module):
+    return None
+
+
+register_namespace_handler(object, null_ns_handler)
+
+
+def normalize_path(filename):
+    """Normalize a file/dir name for comparison purposes"""
+    return os.path.normcase(os.path.realpath(os.path.normpath(_cygwin_patch(filename))))
+
+
+def _cygwin_patch(filename):  # pragma: nocover
+    """
+    Contrary to POSIX 2008, on Cygwin, getcwd (3) contains
+    symlink components. Using
+    os.path.abspath() works around this limitation. A fix in os.getcwd()
+    would probably better, in Cygwin even more so, except
+    that this seems to be by design...
+    """
+    return os.path.abspath(filename) if sys.platform == 'cygwin' else filename
+
+
+def _normalize_cached(filename, _cache={}):
+    try:
+        return _cache[filename]
+    except KeyError:
+        _cache[filename] = result = normalize_path(filename)
+        return result
+
+
+def _is_egg_path(path):
+    """
+    Determine if given path appears to be an egg.
+    """
+    return path.lower().endswith('.egg')
+
+
+def _is_unpacked_egg(path):
+    """
+    Determine if given path appears to be an unpacked egg.
+    """
+    return (
+        _is_egg_path(path) and
+        os.path.isfile(os.path.join(path, 'EGG-INFO', 'PKG-INFO'))
+    )
+
+
+def _set_parent_ns(packageName):
+    parts = packageName.split('.')
+    name = parts.pop()
+    if parts:
+        parent = '.'.join(parts)
+        setattr(sys.modules[parent], name, sys.modules[packageName])
+
+
+def yield_lines(strs):
+    """Yield non-empty/non-comment lines of a string or sequence"""
+    if isinstance(strs, six.string_types):
+        for s in strs.splitlines():
+            s = s.strip()
+            # skip blank lines/comments
+            if s and not s.startswith('#'):
+                yield s
+    else:
+        for ss in strs:
+            for s in yield_lines(ss):
+                yield s
+
+
+MODULE = re.compile(r"\w+(\.\w+)*$").match
+EGG_NAME = re.compile(
+    r"""
+    (?P<name>[^-]+) (
+        -(?P<ver>[^-]+) (
+            -py(?P<pyver>[^-]+) (
+                -(?P<plat>.+)
+            )?
+        )?
+    )?
+    """,
+    re.VERBOSE | re.IGNORECASE,
+).match
+
+
+class EntryPoint:
+    """Object representing an advertised importable object"""
+
+    def __init__(self, name, module_name, attrs=(), extras=(), dist=None):
+        if not MODULE(module_name):
+            raise ValueError("Invalid module name", module_name)
+        self.name = name
+        self.module_name = module_name
+        self.attrs = tuple(attrs)
+        self.extras = tuple(extras)
+        self.dist = dist
+
+    def __str__(self):
+        s = "%s = %s" % (self.name, self.module_name)
+        if self.attrs:
+            s += ':' + '.'.join(self.attrs)
+        if self.extras:
+            s += ' [%s]' % ','.join(self.extras)
+        return s
+
+    def __repr__(self):
+        return "EntryPoint.parse(%r)" % str(self)
+
+    def load(self, require=True, *args, **kwargs):
+        """
+        Require packages for this EntryPoint, then resolve it.
+        """
+        if not require or args or kwargs:
+            warnings.warn(
+                "Parameters to load are deprecated.  Call .resolve and "
+                ".require separately.",
+                PkgResourcesDeprecationWarning,
+                stacklevel=2,
+            )
+        if require:
+            self.require(*args, **kwargs)
+        return self.resolve()
+
+    def resolve(self):
+        """
+        Resolve the entry point from its module and attrs.
+        """
+        module = __import__(self.module_name, fromlist=['__name__'], level=0)
+        try:
+            return functools.reduce(getattr, self.attrs, module)
+        except AttributeError as exc:
+            raise ImportError(str(exc))
+
+    def require(self, env=None, installer=None):
+        if self.extras and not self.dist:
+            raise UnknownExtra("Can't require() without a distribution", self)
+
+        # Get the requirements for this entry point with all its extras and
+        # then resolve them. We have to pass `extras` along when resolving so
+        # that the working set knows what extras we want. Otherwise, for
+        # dist-info distributions, the working set will assume that the
+        # requirements for that extra are purely optional and skip over them.
+        reqs = self.dist.requires(self.extras)
+        items = working_set.resolve(reqs, env, installer, extras=self.extras)
+        list(map(working_set.add, items))
+
+    pattern = re.compile(
+        r'\s*'
+        r'(?P<name>.+?)\s*'
+        r'=\s*'
+        r'(?P<module>[\w.]+)\s*'
+        r'(:\s*(?P<attr>[\w.]+))?\s*'
+        r'(?P<extras>\[.*\])?\s*$'
+    )
+
+    @classmethod
+    def parse(cls, src, dist=None):
+        """Parse a single entry point from string `src`
+
+        Entry point syntax follows the form::
+
+            name = some.module:some.attr [extra1, extra2]
+
+        The entry name and module name are required, but the ``:attrs`` and
+        ``[extras]`` parts are optional
+        """
+        m = cls.pattern.match(src)
+        if not m:
+            msg = "EntryPoint must be in 'name=module:attrs [extras]' format"
+            raise ValueError(msg, src)
+        res = m.groupdict()
+        extras = cls._parse_extras(res['extras'])
+        attrs = res['attr'].split('.') if res['attr'] else ()
+        return cls(res['name'], res['module'], attrs, extras, dist)
+
+    @classmethod
+    def _parse_extras(cls, extras_spec):
+        if not extras_spec:
+            return ()
+        req = Requirement.parse('x' + extras_spec)
+        if req.specs:
+            raise ValueError()
+        return req.extras
+
+    @classmethod
+    def parse_group(cls, group, lines, dist=None):
+        """Parse an entry point group"""
+        if not MODULE(group):
+            raise ValueError("Invalid group name", group)
+        this = {}
+        for line in yield_lines(lines):
+            ep = cls.parse(line, dist)
+            if ep.name in this:
+                raise ValueError("Duplicate entry point", group, ep.name)
+            this[ep.name] = ep
+        return this
+
+    @classmethod
+    def parse_map(cls, data, dist=None):
+        """Parse a map of entry point groups"""
+        if isinstance(data, dict):
+            data = data.items()
+        else:
+            data = split_sections(data)
+        maps = {}
+        for group, lines in data:
+            if group is None:
+                if not lines:
+                    continue
+                raise ValueError("Entry points must be listed in groups")
+            group = group.strip()
+            if group in maps:
+                raise ValueError("Duplicate group name", group)
+            maps[group] = cls.parse_group(group, lines, dist)
+        return maps
+
+
+def _remove_md5_fragment(location):
+    if not location:
+        return ''
+    parsed = urllib.parse.urlparse(location)
+    if parsed[-1].startswith('md5='):
+        return urllib.parse.urlunparse(parsed[:-1] + ('',))
+    return location
+
+
+def _version_from_file(lines):
+    """
+    Given an iterable of lines from a Metadata file, return
+    the value of the Version field, if present, or None otherwise.
+    """
+    def is_version_line(line):
+        return line.lower().startswith('version:')
+    version_lines = filter(is_version_line, lines)
+    line = next(iter(version_lines), '')
+    _, _, value = line.partition(':')
+    return safe_version(value.strip()) or None
+
+
+class Distribution:
+    """Wrap an actual or potential sys.path entry w/metadata"""
+    PKG_INFO = 'PKG-INFO'
+
+    def __init__(
+            self, location=None, metadata=None, project_name=None,
+            version=None, py_version=PY_MAJOR, platform=None,
+            precedence=EGG_DIST):
+        self.project_name = safe_name(project_name or 'Unknown')
+        if version is not None:
+            self._version = safe_version(version)
+        self.py_version = py_version
+        self.platform = platform
+        self.location = location
+        self.precedence = precedence
+        self._provider = metadata or empty_provider
+
+    @classmethod
+    def from_location(cls, location, basename, metadata=None, **kw):
+        project_name, version, py_version, platform = [None] * 4
+        basename, ext = os.path.splitext(basename)
+        if ext.lower() in _distributionImpl:
+            cls = _distributionImpl[ext.lower()]
+
+            match = EGG_NAME(basename)
+            if match:
+                project_name, version, py_version, platform = match.group(
+                    'name', 'ver', 'pyver', 'plat'
+                )
+        return cls(
+            location, metadata, project_name=project_name, version=version,
+            py_version=py_version, platform=platform, **kw
+        )._reload_version()
+
+    def _reload_version(self):
+        return self
+
+    @property
+    def hashcmp(self):
+        return (
+            self.parsed_version,
+            self.precedence,
+            self.key,
+            _remove_md5_fragment(self.location),
+            self.py_version or '',
+            self.platform or '',
+        )
+
+    def __hash__(self):
+        return hash(self.hashcmp)
+
+    def __lt__(self, other):
+        return self.hashcmp < other.hashcmp
+
+    def __le__(self, other):
+        return self.hashcmp <= other.hashcmp
+
+    def __gt__(self, other):
+        return self.hashcmp > other.hashcmp
+
+    def __ge__(self, other):
+        return self.hashcmp >= other.hashcmp
+
+    def __eq__(self, other):
+        if not isinstance(other, self.__class__):
+            # It's not a Distribution, so they are not equal
+            return False
+        return self.hashcmp == other.hashcmp
+
+    def __ne__(self, other):
+        return not self == other
+
+    # These properties have to be lazy so that we don't have to load any
+    # metadata until/unless it's actually needed.  (i.e., some distributions
+    # may not know their name or version without loading PKG-INFO)
+
+    @property
+    def key(self):
+        try:
+            return self._key
+        except AttributeError:
+            self._key = key = self.project_name.lower()
+            return key
+
+    @property
+    def parsed_version(self):
+        if not hasattr(self, "_parsed_version"):
+            self._parsed_version = parse_version(self.version)
+
+        return self._parsed_version
+
+    def _warn_legacy_version(self):
+        LV = packaging.version.LegacyVersion
+        is_legacy = isinstance(self._parsed_version, LV)
+        if not is_legacy:
+            return
+
+        # While an empty version is technically a legacy version and
+        # is not a valid PEP 440 version, it's also unlikely to
+        # actually come from someone and instead it is more likely that
+        # it comes from setuptools attempting to parse a filename and
+        # including it in the list. So for that we'll gate this warning
+        # on if the version is anything at all or not.
+        if not self.version:
+            return
+
+        tmpl = textwrap.dedent("""
+            '{project_name} ({version})' is being parsed as a legacy,
+            non PEP 440,
+            version. You may find odd behavior and sort order.
+            In particular it will be sorted as less than 0.0. It
+            is recommended to migrate to PEP 440 compatible
+            versions.
+            """).strip().replace('\n', ' ')
+
+        warnings.warn(tmpl.format(**vars(self)), PEP440Warning)
+
+    @property
+    def version(self):
+        try:
+            return self._version
+        except AttributeError:
+            version = self._get_version()
+            if version is None:
+                path = self._get_metadata_path_for_display(self.PKG_INFO)
+                msg = (
+                    "Missing 'Version:' header and/or {} file at path: {}"
+                ).format(self.PKG_INFO, path)
+                raise ValueError(msg, self)
+
+            return version
+
+    @property
+    def _dep_map(self):
+        """
+        A map of extra to its list of (direct) requirements
+        for this distribution, including the null extra.
+        """
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._filter_extras(self._build_dep_map())
+        return self.__dep_map
+
+    @staticmethod
+    def _filter_extras(dm):
+        """
+        Given a mapping of extras to dependencies, strip off
+        environment markers and filter out any dependencies
+        not matching the markers.
+        """
+        for extra in list(filter(None, dm)):
+            new_extra = extra
+            reqs = dm.pop(extra)
+            new_extra, _, marker = extra.partition(':')
+            fails_marker = marker and (
+                invalid_marker(marker)
+                or not evaluate_marker(marker)
+            )
+            if fails_marker:
+                reqs = []
+            new_extra = safe_extra(new_extra) or None
+
+            dm.setdefault(new_extra, []).extend(reqs)
+        return dm
+
+    def _build_dep_map(self):
+        dm = {}
+        for name in 'requires.txt', 'depends.txt':
+            for extra, reqs in split_sections(self._get_metadata(name)):
+                dm.setdefault(extra, []).extend(parse_requirements(reqs))
+        return dm
+
+    def requires(self, extras=()):
+        """List of Requirements needed for this distro if `extras` are used"""
+        dm = self._dep_map
+        deps = []
+        deps.extend(dm.get(None, ()))
+        for ext in extras:
+            try:
+                deps.extend(dm[safe_extra(ext)])
+            except KeyError:
+                raise UnknownExtra(
+                    "%s has no such extra feature %r" % (self, ext)
+                )
+        return deps
+
+    def _get_metadata_path_for_display(self, name):
+        """
+        Return the path to the given metadata file, if available.
+        """
+        try:
+            # We need to access _get_metadata_path() on the provider object
+            # directly rather than through this class's __getattr__()
+            # since _get_metadata_path() is marked private.
+            path = self._provider._get_metadata_path(name)
+
+        # Handle exceptions e.g. in case the distribution's metadata
+        # provider doesn't support _get_metadata_path().
+        except Exception:
+            return '[could not detect]'
+
+        return path
+
+    def _get_metadata(self, name):
+        if self.has_metadata(name):
+            for line in self.get_metadata_lines(name):
+                yield line
+
+    def _get_version(self):
+        lines = self._get_metadata(self.PKG_INFO)
+        version = _version_from_file(lines)
+
+        return version
+
+    def activate(self, path=None, replace=False):
+        """Ensure distribution is importable on `path` (default=sys.path)"""
+        if path is None:
+            path = sys.path
+        self.insert_on(path, replace=replace)
+        if path is sys.path:
+            fixup_namespace_packages(self.location)
+            for pkg in self._get_metadata('namespace_packages.txt'):
+                if pkg in sys.modules:
+                    declare_namespace(pkg)
+
+    def egg_name(self):
+        """Return what this distribution's standard .egg filename should be"""
+        filename = "%s-%s-py%s" % (
+            to_filename(self.project_name), to_filename(self.version),
+            self.py_version or PY_MAJOR
+        )
+
+        if self.platform:
+            filename += '-' + self.platform
+        return filename
+
+    def __repr__(self):
+        if self.location:
+            return "%s (%s)" % (self, self.location)
+        else:
+            return str(self)
+
+    def __str__(self):
+        try:
+            version = getattr(self, 'version', None)
+        except ValueError:
+            version = None
+        version = version or "[unknown version]"
+        return "%s %s" % (self.project_name, version)
+
+    def __getattr__(self, attr):
+        """Delegate all unrecognized public attributes to .metadata provider"""
+        if attr.startswith('_'):
+            raise AttributeError(attr)
+        return getattr(self._provider, attr)
+
+    def __dir__(self):
+        return list(
+            set(super(Distribution, self).__dir__())
+            | set(
+                attr for attr in self._provider.__dir__()
+                if not attr.startswith('_')
+            )
+        )
+
+    if not hasattr(object, '__dir__'):
+        # python 2.7 not supported
+        del __dir__
+
+    @classmethod
+    def from_filename(cls, filename, metadata=None, **kw):
+        return cls.from_location(
+            _normalize_cached(filename), os.path.basename(filename), metadata,
+            **kw
+        )
+
+    def as_requirement(self):
+        """Return a ``Requirement`` that matches this distribution exactly"""
+        if isinstance(self.parsed_version, packaging.version.Version):
+            spec = "%s==%s" % (self.project_name, self.parsed_version)
+        else:
+            spec = "%s===%s" % (self.project_name, self.parsed_version)
+
+        return Requirement.parse(spec)
+
+    def load_entry_point(self, group, name):
+        """Return the `name` entry point of `group` or raise ImportError"""
+        ep = self.get_entry_info(group, name)
+        if ep is None:
+            raise ImportError("Entry point %r not found" % ((group, name),))
+        return ep.load()
+
+    def get_entry_map(self, group=None):
+        """Return the entry point map for `group`, or the full entry map"""
+        try:
+            ep_map = self._ep_map
+        except AttributeError:
+            ep_map = self._ep_map = EntryPoint.parse_map(
+                self._get_metadata('entry_points.txt'), self
+            )
+        if group is not None:
+            return ep_map.get(group, {})
+        return ep_map
+
+    def get_entry_info(self, group, name):
+        """Return the EntryPoint object for `group`+`name`, or ``None``"""
+        return self.get_entry_map(group).get(name)
+
+    def insert_on(self, path, loc=None, replace=False):
+        """Ensure self.location is on path
+
+        If replace=False (default):
+            - If location is already in path anywhere, do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent.
+              - Else: add to the end of path.
+        If replace=True:
+            - If location is already on path anywhere (not eggs)
+              or higher priority than its parent (eggs)
+              do nothing.
+            - Else:
+              - If it's an egg and its parent directory is on path,
+                insert just ahead of the parent,
+                removing any lower-priority entries.
+              - Else: add it to the front of path.
+        """
+
+        loc = loc or self.location
+        if not loc:
+            return
+
+        nloc = _normalize_cached(loc)
+        bdir = os.path.dirname(nloc)
+        npath = [(p and _normalize_cached(p) or p) for p in path]
+
+        for p, item in enumerate(npath):
+            if item == nloc:
+                if replace:
+                    break
+                else:
+                    # don't modify path (even removing duplicates) if
+                    # found and not replace
+                    return
+            elif item == bdir and self.precedence == EGG_DIST:
+                # if it's an .egg, give it precedence over its directory
+                # UNLESS it's already been added to sys.path and replace=False
+                if (not replace) and nloc in npath[p:]:
+                    return
+                if path is sys.path:
+                    self.check_version_conflict()
+                path.insert(p, loc)
+                npath.insert(p, nloc)
+                break
+        else:
+            if path is sys.path:
+                self.check_version_conflict()
+            if replace:
+                path.insert(0, loc)
+            else:
+                path.append(loc)
+            return
+
+        # p is the spot where we found or inserted loc; now remove duplicates
+        while True:
+            try:
+                np = npath.index(nloc, p + 1)
+            except ValueError:
+                break
+            else:
+                del npath[np], path[np]
+                # ha!
+                p = np
+
+        return
+
+    def check_version_conflict(self):
+        if self.key == 'setuptools':
+            # ignore the inevitable setuptools self-conflicts  :(
+            return
+
+        nsp = dict.fromkeys(self._get_metadata('namespace_packages.txt'))
+        loc = normalize_path(self.location)
+        for modname in self._get_metadata('top_level.txt'):
+            if (modname not in sys.modules or modname in nsp
+                    or modname in _namespace_packages):
+                continue
+            if modname in ('pkg_resources', 'setuptools', 'site'):
+                continue
+            fn = getattr(sys.modules[modname], '__file__', None)
+            if fn and (normalize_path(fn).startswith(loc) or
+                       fn.startswith(self.location)):
+                continue
+            issue_warning(
+                "Module %s was already imported from %s, but %s is being added"
+                " to sys.path" % (modname, fn, self.location),
+            )
+
+    def has_version(self):
+        try:
+            self.version
+        except ValueError:
+            issue_warning("Unbuilt egg for " + repr(self))
+            return False
+        return True
+
+    def clone(self, **kw):
+        """Copy this distribution, substituting in any changed keyword args"""
+        names = 'project_name version py_version platform location precedence'
+        for attr in names.split():
+            kw.setdefault(attr, getattr(self, attr, None))
+        kw.setdefault('metadata', self._provider)
+        return self.__class__(**kw)
+
+    @property
+    def extras(self):
+        return [dep for dep in self._dep_map if dep]
+
+
+class EggInfoDistribution(Distribution):
+    def _reload_version(self):
+        """
+        Packages installed by distutils (e.g. numpy or scipy),
+        which uses an old safe_version, and so
+        their version numbers can get mangled when
+        converted to filenames (e.g., 1.11.0.dev0+2329eae to
+        1.11.0.dev0_2329eae). These distributions will not be
+        parsed properly
+        downstream by Distribution and safe_version, so
+        take an extra step and try to get the version number from
+        the metadata file itself instead of the filename.
+        """
+        md_version = self._get_version()
+        if md_version:
+            self._version = md_version
+        return self
+
+
+class DistInfoDistribution(Distribution):
+    """
+    Wrap an actual or potential sys.path entry
+    w/metadata, .dist-info style.
+    """
+    PKG_INFO = 'METADATA'
+    EQEQ = re.compile(r"([\(,])\s*(\d.*?)\s*([,\)])")
+
+    @property
+    def _parsed_pkg_info(self):
+        """Parse and cache metadata"""
+        try:
+            return self._pkg_info
+        except AttributeError:
+            metadata = self.get_metadata(self.PKG_INFO)
+            self._pkg_info = email.parser.Parser().parsestr(metadata)
+            return self._pkg_info
+
+    @property
+    def _dep_map(self):
+        try:
+            return self.__dep_map
+        except AttributeError:
+            self.__dep_map = self._compute_dependencies()
+            return self.__dep_map
+
+    def _compute_dependencies(self):
+        """Recompute this distribution's dependencies."""
+        dm = self.__dep_map = {None: []}
+
+        reqs = []
+        # Including any condition expressions
+        for req in self._parsed_pkg_info.get_all('Requires-Dist') or []:
+            reqs.extend(parse_requirements(req))
+
+        def reqs_for_extra(extra):
+            for req in reqs:
+                if not req.marker or req.marker.evaluate({'extra': extra}):
+                    yield req
+
+        common = frozenset(reqs_for_extra(None))
+        dm[None].extend(common)
+
+        for extra in self._parsed_pkg_info.get_all('Provides-Extra') or []:
+            s_extra = safe_extra(extra.strip())
+            dm[s_extra] = list(frozenset(reqs_for_extra(extra)) - common)
+
+        return dm
+
+
+_distributionImpl = {
+    '.egg': Distribution,
+    '.egg-info': EggInfoDistribution,
+    '.dist-info': DistInfoDistribution,
+}
+
+
+def issue_warning(*args, **kw):
+    level = 1
+    g = globals()
+    try:
+        # find the first stack frame that is *not* code in
+        # the pkg_resources module, to use for the warning
+        while sys._getframe(level).f_globals is g:
+            level += 1
+    except ValueError:
+        pass
+    warnings.warn(stacklevel=level + 1, *args, **kw)
+
+
+class RequirementParseError(ValueError):
+    def __str__(self):
+        return ' '.join(self.args)
+
+
+def parse_requirements(strs):
+    """Yield ``Requirement`` objects for each specification in `strs`
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    # create a steppable iterator, so we can handle \-continuations
+    lines = iter(yield_lines(strs))
+
+    for line in lines:
+        # Drop comments -- a hash without a space may be in a URL.
+        if ' #' in line:
+            line = line[:line.find(' #')]
+        # If there is a line continuation, drop it, and append the next line.
+        if line.endswith('\\'):
+            line = line[:-2].strip()
+            try:
+                line += next(lines)
+            except StopIteration:
+                return
+        yield Requirement(line)
+
+
+class Requirement(packaging.requirements.Requirement):
+    def __init__(self, requirement_string):
+        """DO NOT CALL THIS UNDOCUMENTED METHOD; use Requirement.parse()!"""
+        try:
+            super(Requirement, self).__init__(requirement_string)
+        except packaging.requirements.InvalidRequirement as e:
+            raise RequirementParseError(str(e))
+        self.unsafe_name = self.name
+        project_name = safe_name(self.name)
+        self.project_name, self.key = project_name, project_name.lower()
+        self.specs = [
+            (spec.operator, spec.version) for spec in self.specifier]
+        self.extras = tuple(map(safe_extra, self.extras))
+        self.hashCmp = (
+            self.key,
+            self.url,
+            self.specifier,
+            frozenset(self.extras),
+            str(self.marker) if self.marker else None,
+        )
+        self.__hash = hash(self.hashCmp)
+
+    def __eq__(self, other):
+        return (
+            isinstance(other, Requirement) and
+            self.hashCmp == other.hashCmp
+        )
+
+    def __ne__(self, other):
+        return not self == other
+
+    def __contains__(self, item):
+        if isinstance(item, Distribution):
+            if item.key != self.key:
+                return False
+
+            item = item.version
+
+        # Allow prereleases always in order to match the previous behavior of
+        # this method. In the future this should be smarter and follow PEP 440
+        # more accurately.
+        return self.specifier.contains(item, prereleases=True)
+
+    def __hash__(self):
+        return self.__hash
+
+    def __repr__(self):
+        return "Requirement.parse(%r)" % str(self)
+
+    @staticmethod
+    def parse(s):
+        req, = parse_requirements(s)
+        return req
+
+
+def _always_object(classes):
+    """
+    Ensure object appears in the mro even
+    for old-style classes.
+    """
+    if object not in classes:
+        return classes + (object,)
+    return classes
+
+
+def _find_adapter(registry, ob):
+    """Return an adapter factory for `ob` from `registry`"""
+    types = _always_object(inspect.getmro(getattr(ob, '__class__', type(ob))))
+    for t in types:
+        if t in registry:
+            return registry[t]
+
+
+def ensure_directory(path):
+    """Ensure that the parent directory of `path` exists"""
+    dirname = os.path.dirname(path)
+    py31compat.makedirs(dirname, exist_ok=True)
+
+
+def _bypass_ensure_directory(path):
+    """Sandbox-bypassing version of ensure_directory()"""
+    if not WRITE_SUPPORT:
+        raise IOError('"os.mkdir" not supported on this platform.')
+    dirname, filename = split(path)
+    if dirname and filename and not isdir(dirname):
+        _bypass_ensure_directory(dirname)
+        try:
+            mkdir(dirname, 0o755)
+        except FileExistsError:
+            pass
+
+
+def split_sections(s):
+    """Split a string or iterable thereof into (section, content) pairs
+
+    Each ``section`` is a stripped version of the section header ("[section]")
+    and each ``content`` is a list of stripped lines excluding blank lines and
+    comment-only lines.  If there are any such lines before the first section
+    header, they're returned in a first ``section`` of ``None``.
+    """
+    section = None
+    content = []
+    for line in yield_lines(s):
+        if line.startswith("["):
+            if line.endswith("]"):
+                if section or content:
+                    yield section, content
+                section = line[1:-1].strip()
+                content = []
+            else:
+                raise ValueError("Invalid section heading", line)
+        else:
+            content.append(line)
+
+    # wrap up last segment
+    yield section, content
+
+
+def _mkstemp(*args, **kw):
+    old_open = os.open
+    try:
+        # temporarily bypass sandboxing
+        os.open = os_open
+        return tempfile.mkstemp(*args, **kw)
+    finally:
+        # and then put it back
+        os.open = old_open
+
+
+# Silence the PEP440Warning by default, so that end users don't get hit by it
+# randomly just because they use pkg_resources. We want to append the rule
+# because we want earlier uses of filterwarnings to take precedence over this
+# one.
+warnings.filterwarnings("ignore", category=PEP440Warning, append=True)
+
+
+# from jaraco.functools 1.3
+def _call_aside(f, *args, **kwargs):
+    f(*args, **kwargs)
+    return f
+
+
+@_call_aside
+def _initialize(g=globals()):
+    "Set up global resource manager (deliberately not state-saved)"
+    manager = ResourceManager()
+    g['_manager'] = manager
+    g.update(
+        (name, getattr(manager, name))
+        for name in dir(manager)
+        if not name.startswith('_')
+    )
+
+
+@_call_aside
+def _initialize_master_working_set():
+    """
+    Prepare the master working set and make the ``require()``
+    API available.
+
+    This function has explicit effects on the global state
+    of pkg_resources. It is intended to be invoked once at
+    the initialization of this module.
+
+    Invocation by other packages is unsupported and done
+    at their own risk.
+    """
+    working_set = WorkingSet._build_master()
+    _declare_state('object', working_set=working_set)
+
+    require = working_set.require
+    iter_entry_points = working_set.iter_entry_points
+    add_activation_listener = working_set.subscribe
+    run_script = working_set.run_script
+    # backward compatibility
+    run_main = run_script
+    # Activate all distributions already on sys.path with replace=False and
+    # ensure that all distributions added to the working set in the future
+    # (e.g. by calling ``require()``) will get activated as well,
+    # with higher priority (replace=True).
+    tuple(
+        dist.activate(replace=False)
+        for dist in working_set
+    )
+    add_activation_listener(
+        lambda dist: dist.activate(replace=True),
+        existing=False,
+    )
+    working_set.entries = []
+    # match order
+    list(map(working_set.add_entry, sys.path))
+    globals().update(locals())
+
+class PkgResourcesDeprecationWarning(Warning):
+    """
+    Base class for warning about deprecations in ``pkg_resources``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
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+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/appdirs.py
@@ -0,0 +1,608 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Copyright (c) 2005-2010 ActiveState Software Inc.
+# Copyright (c) 2013 Eddy Petrișor
+
+"""Utilities for determining application-specific dirs.
+
+See <http://github.com/ActiveState/appdirs> for details and usage.
+"""
+# Dev Notes:
+# - MSDN on where to store app data files:
+#   http://support.microsoft.com/default.aspx?scid=kb;en-us;310294#XSLTH3194121123120121120120
+# - Mac OS X: http://developer.apple.com/documentation/MacOSX/Conceptual/BPFileSystem/index.html
+# - XDG spec for Un*x: http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+
+__version_info__ = (1, 4, 3)
+__version__ = '.'.join(map(str, __version_info__))
+
+
+import sys
+import os
+
+PY3 = sys.version_info[0] == 3
+
+if PY3:
+    unicode = str
+
+if sys.platform.startswith('java'):
+    import platform
+    os_name = platform.java_ver()[3][0]
+    if os_name.startswith('Windows'): # "Windows XP", "Windows 7", etc.
+        system = 'win32'
+    elif os_name.startswith('Mac'): # "Mac OS X", etc.
+        system = 'darwin'
+    else: # "Linux", "SunOS", "FreeBSD", etc.
+        # Setting this to "linux2" is not ideal, but only Windows or Mac
+        # are actually checked for and the rest of the module expects
+        # *sys.platform* style strings.
+        system = 'linux2'
+else:
+    system = sys.platform
+
+
+
+def user_data_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user data directories are:
+        Mac OS X:               ~/Library/Application Support/<AppName>
+        Unix:                   ~/.local/share/<AppName>    # or in $XDG_DATA_HOME, if defined
+        Win XP (not roaming):   C:\Documents and Settings\<username>\Application Data\<AppAuthor>\<AppName>
+        Win XP (roaming):       C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>
+        Win 7  (not roaming):   C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>
+        Win 7  (roaming):       C:\Users\<username>\AppData\Roaming\<AppAuthor>\<AppName>
+
+    For Unix, we follow the XDG spec and support $XDG_DATA_HOME.
+    That means, by default "~/.local/share/<AppName>".
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        const = roaming and "CSIDL_APPDATA" or "CSIDL_LOCAL_APPDATA"
+        path = os.path.normpath(_get_win_folder(const))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Application Support/')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_DATA_HOME', os.path.expanduser("~/.local/share"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_data_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of data dirs should be
+            returned. By default, the first item from XDG_DATA_DIRS is
+            returned, or '/usr/local/share/<AppName>',
+            if XDG_DATA_DIRS is not set
+
+    Typical site data directories are:
+        Mac OS X:   /Library/Application Support/<AppName>
+        Unix:       /usr/local/share/<AppName> or /usr/share/<AppName>
+        Win XP:     C:\Documents and Settings\All Users\Application Data\<AppAuthor>\<AppName>
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+        Win 7:      C:\ProgramData\<AppAuthor>\<AppName>   # Hidden, but writeable on Win 7.
+
+    For Unix, this is using the $XDG_DATA_DIRS[0] default.
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_COMMON_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+    elif system == 'darwin':
+        path = os.path.expanduser('/Library/Application Support')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        # XDG default for $XDG_DATA_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_DATA_DIRS',
+                         os.pathsep.join(['/usr/local/share', '/usr/share']))
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+        return path
+
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_config_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific config dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user config directories are:
+        Mac OS X:               same as user_data_dir
+        Unix:                   ~/.config/<AppName>     # or in $XDG_CONFIG_HOME, if defined
+        Win *:                  same as user_data_dir
+
+    For Unix, we follow the XDG spec and support $XDG_CONFIG_HOME.
+    That means, by default "~/.config/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_CONFIG_HOME', os.path.expanduser("~/.config"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def site_config_dir(appname=None, appauthor=None, version=None, multipath=False):
+    r"""Return full path to the user-shared data dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "multipath" is an optional parameter only applicable to *nix
+            which indicates that the entire list of config dirs should be
+            returned. By default, the first item from XDG_CONFIG_DIRS is
+            returned, or '/etc/xdg/<AppName>', if XDG_CONFIG_DIRS is not set
+
+    Typical site config directories are:
+        Mac OS X:   same as site_data_dir
+        Unix:       /etc/xdg/<AppName> or $XDG_CONFIG_DIRS[i]/<AppName> for each value in
+                    $XDG_CONFIG_DIRS
+        Win *:      same as site_data_dir
+        Vista:      (Fail! "C:\ProgramData" is a hidden *system* directory on Vista.)
+
+    For Unix, this is using the $XDG_CONFIG_DIRS[0] default, if multipath=False
+
+    WARNING: Do not use this on Windows. See the Vista-Fail note above for why.
+    """
+    if system in ["win32", "darwin"]:
+        path = site_data_dir(appname, appauthor)
+        if appname and version:
+            path = os.path.join(path, version)
+    else:
+        # XDG default for $XDG_CONFIG_DIRS
+        # only first, if multipath is False
+        path = os.getenv('XDG_CONFIG_DIRS', '/etc/xdg')
+        pathlist = [os.path.expanduser(x.rstrip(os.sep)) for x in path.split(os.pathsep)]
+        if appname:
+            if version:
+                appname = os.path.join(appname, version)
+            pathlist = [os.sep.join([x, appname]) for x in pathlist]
+
+        if multipath:
+            path = os.pathsep.join(pathlist)
+        else:
+            path = pathlist[0]
+    return path
+
+
+def user_cache_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific cache dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Cache" to the base app data dir for Windows. See
+            discussion below.
+
+    Typical user cache directories are:
+        Mac OS X:   ~/Library/Caches/<AppName>
+        Unix:       ~/.cache/<AppName> (XDG default)
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Cache
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Cache
+
+    On Windows the only suggestion in the MSDN docs is that local settings go in
+    the `CSIDL_LOCAL_APPDATA` directory. This is identical to the non-roaming
+    app data dir (the default returned by `user_data_dir` above). Apps typically
+    put cache data somewhere *under* the given dir here. Some examples:
+        ...\Mozilla\Firefox\Profiles\<ProfileName>\Cache
+        ...\Acme\SuperApp\Cache\1.0
+    OPINION: This function appends "Cache" to the `CSIDL_LOCAL_APPDATA` value.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "win32":
+        if appauthor is None:
+            appauthor = appname
+        path = os.path.normpath(_get_win_folder("CSIDL_LOCAL_APPDATA"))
+        if appname:
+            if appauthor is not False:
+                path = os.path.join(path, appauthor, appname)
+            else:
+                path = os.path.join(path, appname)
+            if opinion:
+                path = os.path.join(path, "Cache")
+    elif system == 'darwin':
+        path = os.path.expanduser('~/Library/Caches')
+        if appname:
+            path = os.path.join(path, appname)
+    else:
+        path = os.getenv('XDG_CACHE_HOME', os.path.expanduser('~/.cache'))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_state_dir(appname=None, appauthor=None, version=None, roaming=False):
+    r"""Return full path to the user-specific state dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "roaming" (boolean, default False) can be set True to use the Windows
+            roaming appdata directory. That means that for users on a Windows
+            network setup for roaming profiles, this user data will be
+            sync'd on login. See
+            <http://technet.microsoft.com/en-us/library/cc766489(WS.10).aspx>
+            for a discussion of issues.
+
+    Typical user state directories are:
+        Mac OS X:  same as user_data_dir
+        Unix:      ~/.local/state/<AppName>   # or in $XDG_STATE_HOME, if defined
+        Win *:     same as user_data_dir
+
+    For Unix, we follow this Debian proposal <https://wiki.debian.org/XDGBaseDirectorySpecification#state>
+    to extend the XDG spec and support $XDG_STATE_HOME.
+
+    That means, by default "~/.local/state/<AppName>".
+    """
+    if system in ["win32", "darwin"]:
+        path = user_data_dir(appname, appauthor, None, roaming)
+    else:
+        path = os.getenv('XDG_STATE_HOME', os.path.expanduser("~/.local/state"))
+        if appname:
+            path = os.path.join(path, appname)
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+def user_log_dir(appname=None, appauthor=None, version=None, opinion=True):
+    r"""Return full path to the user-specific log dir for this application.
+
+        "appname" is the name of application.
+            If None, just the system directory is returned.
+        "appauthor" (only used on Windows) is the name of the
+            appauthor or distributing body for this application. Typically
+            it is the owning company name. This falls back to appname. You may
+            pass False to disable it.
+        "version" is an optional version path element to append to the
+            path. You might want to use this if you want multiple versions
+            of your app to be able to run independently. If used, this
+            would typically be "<major>.<minor>".
+            Only applied when appname is present.
+        "opinion" (boolean) can be False to disable the appending of
+            "Logs" to the base app data dir for Windows, and "log" to the
+            base cache dir for Unix. See discussion below.
+
+    Typical user log directories are:
+        Mac OS X:   ~/Library/Logs/<AppName>
+        Unix:       ~/.cache/<AppName>/log  # or under $XDG_CACHE_HOME if defined
+        Win XP:     C:\Documents and Settings\<username>\Local Settings\Application Data\<AppAuthor>\<AppName>\Logs
+        Vista:      C:\Users\<username>\AppData\Local\<AppAuthor>\<AppName>\Logs
+
+    On Windows the only suggestion in the MSDN docs is that local settings
+    go in the `CSIDL_LOCAL_APPDATA` directory. (Note: I'm interested in
+    examples of what some windows apps use for a logs dir.)
+
+    OPINION: This function appends "Logs" to the `CSIDL_LOCAL_APPDATA`
+    value for Windows and appends "log" to the user cache dir for Unix.
+    This can be disabled with the `opinion=False` option.
+    """
+    if system == "darwin":
+        path = os.path.join(
+            os.path.expanduser('~/Library/Logs'),
+            appname)
+    elif system == "win32":
+        path = user_data_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "Logs")
+    else:
+        path = user_cache_dir(appname, appauthor, version)
+        version = False
+        if opinion:
+            path = os.path.join(path, "log")
+    if appname and version:
+        path = os.path.join(path, version)
+    return path
+
+
+class AppDirs(object):
+    """Convenience wrapper for getting application dirs."""
+    def __init__(self, appname=None, appauthor=None, version=None,
+            roaming=False, multipath=False):
+        self.appname = appname
+        self.appauthor = appauthor
+        self.version = version
+        self.roaming = roaming
+        self.multipath = multipath
+
+    @property
+    def user_data_dir(self):
+        return user_data_dir(self.appname, self.appauthor,
+                             version=self.version, roaming=self.roaming)
+
+    @property
+    def site_data_dir(self):
+        return site_data_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_config_dir(self):
+        return user_config_dir(self.appname, self.appauthor,
+                               version=self.version, roaming=self.roaming)
+
+    @property
+    def site_config_dir(self):
+        return site_config_dir(self.appname, self.appauthor,
+                             version=self.version, multipath=self.multipath)
+
+    @property
+    def user_cache_dir(self):
+        return user_cache_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_state_dir(self):
+        return user_state_dir(self.appname, self.appauthor,
+                              version=self.version)
+
+    @property
+    def user_log_dir(self):
+        return user_log_dir(self.appname, self.appauthor,
+                            version=self.version)
+
+
+#---- internal support stuff
+
+def _get_win_folder_from_registry(csidl_name):
+    """This is a fallback technique at best. I'm not sure if using the
+    registry for this guarantees us the correct answer for all CSIDL_*
+    names.
+    """
+    if PY3:
+      import winreg as _winreg
+    else:
+      import _winreg
+
+    shell_folder_name = {
+        "CSIDL_APPDATA": "AppData",
+        "CSIDL_COMMON_APPDATA": "Common AppData",
+        "CSIDL_LOCAL_APPDATA": "Local AppData",
+    }[csidl_name]
+
+    key = _winreg.OpenKey(
+        _winreg.HKEY_CURRENT_USER,
+        r"Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders"
+    )
+    dir, type = _winreg.QueryValueEx(key, shell_folder_name)
+    return dir
+
+
+def _get_win_folder_with_pywin32(csidl_name):
+    from win32com.shell import shellcon, shell
+    dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
+    # Try to make this a unicode path because SHGetFolderPath does
+    # not return unicode strings when there is unicode data in the
+    # path.
+    try:
+        dir = unicode(dir)
+
+        # Downgrade to short path name if have highbit chars. See
+        # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+        has_high_char = False
+        for c in dir:
+            if ord(c) > 255:
+                has_high_char = True
+                break
+        if has_high_char:
+            try:
+                import win32api
+                dir = win32api.GetShortPathName(dir)
+            except ImportError:
+                pass
+    except UnicodeError:
+        pass
+    return dir
+
+
+def _get_win_folder_with_ctypes(csidl_name):
+    import ctypes
+
+    csidl_const = {
+        "CSIDL_APPDATA": 26,
+        "CSIDL_COMMON_APPDATA": 35,
+        "CSIDL_LOCAL_APPDATA": 28,
+    }[csidl_name]
+
+    buf = ctypes.create_unicode_buffer(1024)
+    ctypes.windll.shell32.SHGetFolderPathW(None, csidl_const, None, 0, buf)
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in buf:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf2 = ctypes.create_unicode_buffer(1024)
+        if ctypes.windll.kernel32.GetShortPathNameW(buf.value, buf2, 1024):
+            buf = buf2
+
+    return buf.value
+
+def _get_win_folder_with_jna(csidl_name):
+    import array
+    from com.sun import jna
+    from com.sun.jna.platform import win32
+
+    buf_size = win32.WinDef.MAX_PATH * 2
+    buf = array.zeros('c', buf_size)
+    shell = win32.Shell32.INSTANCE
+    shell.SHGetFolderPath(None, getattr(win32.ShlObj, csidl_name), None, win32.ShlObj.SHGFP_TYPE_CURRENT, buf)
+    dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    # Downgrade to short path name if have highbit chars. See
+    # <http://bugs.activestate.com/show_bug.cgi?id=85099>.
+    has_high_char = False
+    for c in dir:
+        if ord(c) > 255:
+            has_high_char = True
+            break
+    if has_high_char:
+        buf = array.zeros('c', buf_size)
+        kernel = win32.Kernel32.INSTANCE
+        if kernel.GetShortPathName(dir, buf, buf_size):
+            dir = jna.Native.toString(buf.tostring()).rstrip("\0")
+
+    return dir
+
+if system == "win32":
+    try:
+        import win32com.shell
+        _get_win_folder = _get_win_folder_with_pywin32
+    except ImportError:
+        try:
+            from ctypes import windll
+            _get_win_folder = _get_win_folder_with_ctypes
+        except ImportError:
+            try:
+                import com.sun.jna
+                _get_win_folder = _get_win_folder_with_jna
+            except ImportError:
+                _get_win_folder = _get_win_folder_from_registry
+
+
+#---- self test code
+
+if __name__ == "__main__":
+    appname = "MyApp"
+    appauthor = "MyCompany"
+
+    props = ("user_data_dir",
+             "user_config_dir",
+             "user_cache_dir",
+             "user_state_dir",
+             "user_log_dir",
+             "site_data_dir",
+             "site_config_dir")
+
+    print("-- app dirs %s --" % __version__)
+
+    print("-- app dirs (with optional 'version')")
+    dirs = AppDirs(appname, appauthor, version="1.0")
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'version')")
+    dirs = AppDirs(appname, appauthor)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (without optional 'appauthor')")
+    dirs = AppDirs(appname)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
+
+    print("\n-- app dirs (with disabled 'appauthor')")
+    dirs = AppDirs(appname, appauthor=False)
+    for prop in props:
+        print("%s: %s" % (prop, getattr(dirs, prop)))
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__about__.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..95d330e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__about__.py
@@ -0,0 +1,21 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "16.8"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2016 %s" % __author__
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__init__.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..5ee6220
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__init__.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__, __copyright__, __email__, __license__, __summary__, __title__,
+    __uri__, __version__
+)
+
+__all__ = [
+    "__title__", "__summary__", "__uri__", "__version__", "__author__",
+    "__email__", "__license__", "__copyright__",
+]
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-39.pyc
new file mode 100644
index 0000000..11b44bc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__about__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..b9b9bbe
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-39.pyc
new file mode 100644
index 0000000..6ed7a34
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_compat.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
new file mode 100644
index 0000000..1f4bae8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-39.pyc
new file mode 100644
index 0000000..11e400c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/markers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
new file mode 100644
index 0000000..ae98364
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
new file mode 100644
index 0000000..7682bac
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-39.pyc
new file mode 100644
index 0000000..b1fdc34
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/utils.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-39.pyc
new file mode 100644
index 0000000..a0c6d06
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/__pycache__/version.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_compat.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_compat.py
new file mode 100644
index 0000000..210bb80
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_compat.py
@@ -0,0 +1,30 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = str,
+else:
+    string_types = basestring,
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_structures.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..ccc2786
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+NegativeInfinity = NegativeInfinity()
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/markers.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/markers.py
new file mode 100644
index 0000000..892e578
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/markers.py
@@ -0,0 +1,301 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from pkg_resources.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from pkg_resources.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker", "UndefinedComparison", "UndefinedEnvironmentName",
+    "Marker", "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version") |
+    L("platform_python_implementation") |
+    L("implementation_name") |
+    L("python_full_version") |
+    L("platform_release") |
+    L("platform_version") |
+    L("platform_machine") |
+    L("platform_system") |
+    L("python_version") |
+    L("sys_platform") |
+    L("os_name") |
+    L("os.name") |  # PEP-345
+    L("sys.platform") |  # PEP-345
+    L("platform.version") |  # PEP-345
+    L("platform.machine") |  # PEP-345
+    L("platform.python_implementation") |  # PEP-345
+    L("python_implementation") |  # undocumented setuptools legacy
+    L("extra")
+)
+ALIASES = {
+    'os.name': 'os_name',
+    'sys.platform': 'sys_platform',
+    'platform.version': 'platform_version',
+    'platform.machine': 'platform_machine',
+    'platform.python_implementation': 'platform_python_implementation',
+    'python_implementation': 'platform_python_implementation'
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") |
+    L("==") |
+    L(">=") |
+    L("<=") |
+    L("!=") |
+    L("~=") |
+    L(">") |
+    L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (isinstance(marker, list) and len(marker) == 1 and
+            isinstance(marker[0], (list, tuple))):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = '{0.major}.{0.minor}.{0.micro}'.format(info)
+    kind = info.releaselevel
+    if kind != 'final':
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, 'implementation'):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = '0'
+        implementation_name = ''
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": platform.python_version()[:3],
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc:e.loc + 8])
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/requirements.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..0c8c4a3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/requirements.py
@@ -0,0 +1,127 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from pkg_resources.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from pkg_resources.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from pkg_resources.extern.pyparsing import Literal as L  # noqa
+from pkg_resources.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r'[^ ]+')("url")
+URL = (AT + URI)
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE),
+                       joinString=",", adjacent=False)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or '')
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start:t._original_end])
+)
+MARKER_SEPERATOR = SEMICOLON
+MARKER = MARKER_SEPERATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = \
+    NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                "Invalid requirement, parse error at \"{0!r}\"".format(
+                    requirement_string[e.loc:e.loc + 8]))
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if not (parsed_url.scheme and parsed_url.netloc) or (
+                    not parsed_url.scheme and not parsed_url.netloc):
+                raise InvalidRequirement("Invalid URL given")
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/specifiers.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..7f5a76c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/specifiers.py
@@ -0,0 +1,774 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (
+            match.group("operator").strip(),
+            match.group("version").strip(),
+        )
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(
+            self.__class__.__name__,
+            str(self),
+            pre,
+        )
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if (parsed_version.is_prerelease and not
+                        (prereleases or self.prereleases)):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the begining.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = (
+        r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+    )
+
+    _regex = re.compile(
+        r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not
+                               x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return (self._get_operator(">=")(prospective, spec) and
+                self._get_operator("==")(prospective, prefix))
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[:len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is techincally greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]):])
+    right_split.append(right[len(right_split[0]):])
+
+    # Insert our padding
+    left_split.insert(
+        1,
+        ["0"] * max(0, len(right_split[0]) - len(left_split[0])),
+    )
+    right_split.insert(
+        1,
+        ["0"] * max(0, len(left_split[0]) - len(right_split[0])),
+    )
+
+    return (
+        list(itertools.chain(*left_split)),
+        list(itertools.chain(*right_split)),
+    )
+
+
+class SpecifierSet(BaseSpecifier):
+
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(
+            s.contains(item, prereleases=prereleases)
+            for s in self._specs
+        )
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/utils.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/utils.py
new file mode 100644
index 0000000..942387c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/utils.py
@@ -0,0 +1,14 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/version.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/version.py
new file mode 100644
index 0000000..83b5ee8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/packaging/version.py
@@ -0,0 +1,393 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = [
+    "parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"
+]
+
+
+_Version = collections.namedtuple(
+    "_Version",
+    ["epoch", "release", "dev", "pre", "post", "local"],
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(
+    r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE,
+)
+
+_legacy_version_replacement_map = {
+    "pre": "c", "preview": "c", "-": "final-", "rc": "c", "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(
+        r"^\s*" + VERSION_PATTERN + r"\s*$",
+        re.VERBOSE | re.IGNORECASE,
+    )
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(
+                match.group("pre_l"),
+                match.group("pre_n"),
+            ),
+            post=_parse_letter_version(
+                match.group("post_l"),
+                match.group("post_n1") or match.group("post_n2"),
+            ),
+            dev=_parse_letter_version(
+                match.group("dev_l"),
+                match.group("dev_n"),
+            ),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        # Pre-release
+        if self._version.pre is not None:
+            parts.append("".join(str(x) for x in self._version.pre))
+
+        # Post-release
+        if self._version.post is not None:
+            parts.append(".post{0}".format(self._version.post[1]))
+
+        # Development release
+        if self._version.dev is not None:
+            parts.append(".dev{0}".format(self._version.dev[1]))
+
+        # Local version segment
+        if self._version.local is not None:
+            parts.append(
+                "+{0}".format(".".join(str(x) for x in self._version.local))
+            )
+
+        return "".join(parts)
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self._version.epoch != 0:
+            parts.append("{0}!".format(self._version.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self._version.release))
+
+        return "".join(parts)
+
+    @property
+    def local(self):
+        version_string = str(self)
+        if "+" in version_string:
+            return version_string.split("+", 1)[1]
+
+    @property
+    def is_prerelease(self):
+        return bool(self._version.dev or self._version.pre)
+
+    @property
+    def is_postrelease(self):
+        return bool(self._version.post)
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_seperators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_seperators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(
+            itertools.dropwhile(
+                lambda x: x == 0,
+                reversed(release),
+            )
+        ))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple(
+            (i, "") if isinstance(i, int) else (-Infinity, i)
+            for i in local
+        )
+
+    return epoch, release, pre, post, dev, local
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/pyparsing.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/pyparsing.py
new file mode 100644
index 0000000..cf75e1e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py
+#
+# Copyright (c) 2003-2018  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and executing simple grammars,
+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you
+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module
+provides a library of classes that you use to construct the grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form 
+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 
+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to
+L{Literal} expressions)::
+
+    from pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the self-explanatory
+class names, and the use of '+', '|' and '^' operators.
+
+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an
+object with named attributes.
+
+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:
+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)
+ - quoted strings
+ - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes
+ - construct character word-group expressions using the L{Word} class
+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes
+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones
+ - associate names with your parsed results using L{ParserElement.setResultsName}
+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}
+ - find more useful common expressions in the L{pyparsing_common} namespace class
+"""
+
+__version__ = "2.2.1"
+__versionTime__ = "18 Sep 2018 00:49 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
+
+__all__ = [
+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 
+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',
+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 
+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
+'CloseMatch', 'tokenMap', 'pyparsing_common',
+]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries
+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It
+           then < returns the unicode object | encodes it with the default encoding | ... >.
+        """
+        if isinstance(obj,unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__,fname))
+        except AttributeError:
+            continue
+            
+_generatorType = type((y for y in range(1)))
+ 
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
+    for from_,to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+class _Constants(object):
+    pass
+
+alphas     = string.ascii_uppercase + string.ascii_lowercase
+nums       = "0123456789"
+hexnums    = nums + "ABCDEFabcdef"
+alphanums  = alphas + nums
+_bslash    = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, pstr, loc=0, msg=None, elem=None ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException 
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__( self, aname ):
+        """supported attributes by name are:
+            - lineno - returns the line number of the exception text
+            - col - returns the column number of the exception text
+            - line - returns the line containing the exception text
+        """
+        if( aname == "lineno" ):
+            return lineno( self.loc, self.pstr )
+        elif( aname in ("col", "column") ):
+            return col( self.loc, self.pstr )
+        elif( aname == "line" ):
+            return line( self.loc, self.pstr )
+        else:
+            raise AttributeError(aname)
+
+    def __str__( self ):
+        return "%s (at char %d), (line:%d, col:%d)" % \
+                ( self.msg, self.loc, self.lineno, self.column )
+    def __repr__( self ):
+        return _ustr(self)
+    def markInputline( self, markerString = ">!<" ):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+     - lineno - returns the line number of the exception text
+     - col - returns the column number of the exception text
+     - line - returns the line containing the exception text
+        
+    Example::
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+            
+    prints::
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+    """
+    pass
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like L{ParseFatalException}, but thrown internally when an
+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 
+       immediately because an unbacktrackable syntax error has been found"""
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""
+    def __init__( self, parseElementList ):
+        self.parseElementTrace = parseElementList
+
+    def __str__( self ):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self,p1,p2):
+        self.tup = (p1,p2)
+    def __getitem__(self,i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self,i):
+        self.tup = (self.tup[0],i)
+
+class ParseResults(object):
+    """
+    Structured parse results, to provide multiple means of access to the parsed data:
+       - as a list (C{len(results)})
+       - by list index (C{results[0], results[1]}, etc.)
+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})
+
+    Example::
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+    prints::
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name,int):
+                name = _ustr(name) # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
+                if isinstance(toklist,basestring):
+                    toklist = [ toklist ]
+                if asList:
+                    if isinstance(toklist,ParseResults):
+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError,TypeError,IndexError):
+                        self[name] = toklist
+
+    def __getitem__( self, i ):
+        if isinstance( i, (int,slice) ):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[i] ])
+
+    def __setitem__( self, k, v, isinstance=isinstance ):
+        if isinstance(v,_ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
+            sub = v[0]
+        elif isinstance(k,(int,slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
+            sub = v
+        if isinstance(sub,ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__( self, i ):
+        if isinstance(i,(int,slice)):
+            mylen = len( self.__toklist )
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i+1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name,occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__( self, k ):
+        return k in self.__tokdict
+
+    def __len__( self ): return len( self.__toklist )
+    def __bool__(self): return ( not not self.__toklist )
+    __nonzero__ = __bool__
+    def __iter__( self ): return iter( self.__toklist )
+    def __reversed__( self ): return iter( self.__toklist[::-1] )
+    def _iterkeys( self ):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues( self ):
+        return (self[k] for k in self._iterkeys())
+            
+    def _iteritems( self ):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys       
+        """Returns an iterator of all named result keys (Python 3.x only)."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values (Python 3.x only)."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys( self ):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values( self ):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+                
+        def items( self ):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys( self ):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+        
+    def pop( self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default=C{last}).
+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no
+        argument or an integer argument, it will use C{list} semantics
+        and pop tokens from the list of parsed tokens. If passed a 
+        non-integer argument (most likely a string), it will use C{dict}
+        semantics and pop the corresponding value from any defined 
+        results names. A second default return value argument is 
+        supported, just as in C{dict.pop()}.
+
+        Example::
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+        prints::
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k,v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int) or 
+                        len(args) == 1 or 
+                        args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given C{defaultValue} or C{None} if no
+        C{defaultValue} is specified.
+
+        Similar to C{dict.get()}.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert( self, index, insStr ):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+        
+        Similar to C{list.insert()}.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name,occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append( self, item ):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend( self, itemseq ):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self += itemseq
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear( self ):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__( self, name ):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+            
+        if name in self.__tokdict:
+            if name not in self.__accumNames:
+                return self.__tokdict[name][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[name] ])
+        else:
+            return ""
+
+    def __add__( self, other ):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__( self, other ):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a<0 else a+offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
+                                for (k,vlist) in otheritems for v in vlist]
+            for k,v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0],ParseResults):
+                    v[0].__parent = wkref(self)
+            
+        self.__toklist += other.__toklist
+        self.__accumNames.update( other.__accumNames )
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other,int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+        
+    def __repr__( self ):
+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
+
+    def __str__( self ):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList( self, sep='' ):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance( item, ParseResults ):
+                out += item._asStringList()
+            else:
+                out.append( _ustr(item) )
+        return out
+
+    def asList( self ):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+            
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
+
+    def asDict( self ):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+            
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+            
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+                
+        return dict((k,toItem(v)) for k,v in item_fn())
+
+    def copy( self ):
+        """
+        Returns a new copy of a C{ParseResults} object.
+        """
+        ret = ParseResults( self.__toklist )
+        ret.__tokdict = self.__tokdict.copy()
+        ret.__parent = self.__parent
+        ret.__accumNames.update( self.__accumNames )
+        ret.__name = self.__name
+        return ret
+
+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
+                                                            for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [ nl, indent, "<", selfTag, ">" ]
+
+        for i,res in enumerate(self.__toklist):
+            if isinstance(res,ParseResults):
+                if i in namedItems:
+                    out += [ res.asXML(namedItems[i],
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+                else:
+                    out += [ res.asXML(None,
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [ nl, nextLevelIndent, "<", resTag, ">",
+                                                xmlBodyText,
+                                                "</", resTag, ">" ]
+
+        out += [ nl, indent, "</", selfTag, ">" ]
+        return "".join(out)
+
+    def __lookup(self,sub):
+        for k,vlist in self.__tokdict.items():
+            for v,loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several 
+        different expressions might match at a particular location.
+
+        Example::
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number") 
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+            
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+        prints::
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1 and
+               len(self.__tokdict) == 1 and
+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', depth=0, full=True):
+        """
+        Diagnostic method for listing out the contents of a C{ParseResults}.
+        Accepts an optional C{indent} argument so that this string can be embedded
+        in a nested display of other data.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+        prints::
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        out.append( indent+_ustr(self.asList()) )
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k,v in self.items())
+                for k,v in items:
+                    if out:
+                        out.append(NL)
+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
+                    if isinstance(v,ParseResults):
+                        if v:
+                            out.append( v.dump(indent,depth+1) )
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv,ParseResults) for vv in self):
+                v = self
+                for i,vv in enumerate(v):
+                    if isinstance(vv,ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
+            
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the C{pprint} module.
+        Accepts additional positional or keyword args as defined for the 
+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})
+
+        Example::
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+        prints::
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return ( self.__toklist,
+                 ( self.__tokdict.copy(),
+                   self.__parent is not None and self.__parent() or None,
+                   self.__accumNames,
+                   self.__name ) )
+
+    def __setstate__(self,state):
+        self.__toklist = state[0]
+        (self.__tokdict,
+         par,
+         inAccumNames,
+         self.__name) = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return (dir(type(self)) + list(self.keys()))
+
+MutableMapping.register(ParseResults)
+
+def col (loc,strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc,strg):
+    """Returns current line number within a string, counting newlines as line separators.
+   The first line is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    return strg.count("\n",0,loc) + 1
+
+def line( loc, strg ):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR+1:nextCR]
+    else:
+        return strg[lastCR+1:]
+
+def _defaultStartDebugAction( instring, loc, expr ):
+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
+
+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction( instring, loc, expr, exc ):
+    print ("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s,l,t: func(t)
+    limit = [0]
+    foundArity = [False]
+    
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3,5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3,5,0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+    
+    # synthesize what would be returned by traceback.extract_stack at the call to 
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+    
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        del tb
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars( chars ):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+            
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+        
+        Example::
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    def __init__( self, savelist=False ):
+        self.parseAction = list()
+        self.failAction = None
+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = ( None, None, None ) #custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy( self ):
+        """
+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions
+        for the same parsing pattern, using copies of the original parse element.
+        
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+            
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+        prints::
+            [5120, 100, 655360, 268435456]
+        Equivalent form of C{expr.copy()} is just C{expr()}::
+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+        """
+        cpy = copy.copy( self )
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName( self, name ):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+        
+        Example::
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if hasattr(self,"exception"):
+            self.exception.msg = self.errmsg
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original C{ParserElement} object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        C{expr("name")} in place of C{expr.setResultsName("name")} - 
+        see L{I{__call__}<__call__>}.
+
+        Example::
+            date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches=True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self,breakFlag = True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set C{breakFlag} to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                pdb.set_trace()
+                return _parseMethod( instring, loc, doActions, callPreParse )
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse,"_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction( self, *fns, **kwargs ):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},
+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:
+         - s   = the original string being parsed (see note below)
+         - loc = the location of the matching substring
+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        Optional keyword arguments:
+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information
+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+        consistent view of the parsed string, the parse location, and line and column
+        positions within the parsed string.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        self.parseAction = list(map(_trim_arity, list(fns)))
+        self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction( self, *fns, **kwargs ):
+        """
+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.
+        
+        See examples in L{I{copy}<copy>}.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See 
+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 
+        functions passed to C{addCondition} need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+         - message = define a custom message to be used in the raised exception
+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+         
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        msg = kwargs.get("message", "failed user-defined condition")
+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
+        for fn in fns:
+            def pa(s,l,t):
+                if not bool(_trim_arity(fn)(s,l,t)):
+                    raise exc_type(s,l,msg)
+            self.parseAction.append(pa)
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction( self, fn ):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           C{fn(s,loc,expr,err)} where:
+            - s = string being parsed
+            - loc = location where expression match was attempted and failed
+            - expr = the parse expression that failed
+            - err = the exception thrown
+           The function returns no value.  It may throw C{L{ParseFatalException}}
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables( self, instring, loc ):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc,dummy = e._parse( instring, loc )
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse( self, instring, loc ):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables( instring, loc )
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        return loc, []
+
+    def postParse( self, instring, loc, tokenlist ):
+        return tokenlist
+
+    #~ @profile
+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
+        debugging = ( self.debug ) #and doActions )
+
+        if debugging or self.failAction:
+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
+            if (self.debugActions[0] ):
+                self.debugActions[0]( instring, loc, self )
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            try:
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            except ParseBaseException as err:
+                #~ print ("Exception raised:", err)
+                if self.debugActions[2]:
+                    self.debugActions[2]( instring, tokensStart, self, err )
+                if self.failAction:
+                    self.failAction( instring, tokensStart, self, err )
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            else:
+                loc,tokens = self.parseImpl( instring, preloc, doActions )
+
+        tokens = self.postParse( instring, loc, tokens )
+
+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        tokens = fn( instring, tokensStart, retTokens )
+                        if tokens is not None:
+                            retTokens = ParseResults( tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                      modal=self.modalResults )
+                except ParseBaseException as err:
+                    #~ print "Exception raised in user parse action:", err
+                    if (self.debugActions[2] ):
+                        self.debugActions[2]( instring, tokensStart, self, err )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    tokens = fn( instring, tokensStart, retTokens )
+                    if tokens is not None:
+                        retTokens = ParseResults( tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                  modal=self.modalResults )
+        if debugging:
+            #~ print ("Matched",self,"->",retTokens.asList())
+            if (self.debugActions[1] ):
+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
+
+        return loc, retTokens
+
+    def tryParse( self, instring, loc ):
+        try:
+            return self._parse( instring, loc, doActions=False )[0]
+        except ParseFatalException:
+            raise ParseException( instring, loc, self.errmsg, self)
+    
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+                
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return (value[0], value[1].copy())
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+           
+           Parameters:
+            - cache_size_limit - (default=C{128}) - if an integer value is provided
+              will limit the size of the packrat cache; if None is passed, then
+              the cache size will be unbounded; if 0 is passed, the cache will
+              be effectively disabled.
+            
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method C{ParserElement.enablePackrat()}.  If
+           your program uses C{psyco} to "compile as you go", you must call
+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,
+           Python will crash.  For best results, call C{enablePackrat()} immediately
+           after importing pyparsing.
+           
+           Example::
+               import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString( self, instring, parseAll=False ):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set C{parseAll} to True (equivalent to ending
+        the grammar with C{L{StringEnd()}}).
+
+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the C{loc} argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+         - calling C{parseWithTabs} on your grammar before calling C{parseString}
+           (see L{I{parseWithTabs}<parseWithTabs>})
+         - define your parse action using the full C{(s,loc,toks)} signature, and
+           reference the input string using the parse action's C{s} argument
+         - explictly expand the tabs in your input string before calling
+           C{parseString}
+        
+        Example::
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            #~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse( instring, 0 )
+            if parseAll:
+                loc = self.preParse( instring, loc )
+                se = Empty() + StringEnd()
+                se._parse( instring, loc )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+        else:
+            return tokens
+
+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If
+        C{overlap} is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens,start,end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+        
+        prints::
+        
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn( instring, loc )
+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+                except ParseException:
+                    loc = preloc+1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn( instring, loc )
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc+1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def transformString( self, instring ):
+        """
+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use C{transformString}, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking C{transformString()} on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  C{transformString()} returns the resulting transformed string.
+        
+        Example::
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+            
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+        Prints::
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t,s,e in self.scanString( instring ):
+                out.append( instring[lastE:s] )
+                if t:
+                    if isinstance(t,ParseResults):
+                        out += t.asList()
+                    elif isinstance(t,list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr,_flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def searchString( self, instring, maxMatches=_MAX_INT ):
+        """
+        Another extension to C{L{scanString}}, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        C{maxMatches} argument, to clip searching after 'n' matches are found.
+        
+        Example::
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+            
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+        prints::
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional C{maxsplit} argument, to limit the number of splits;
+        and the optional C{includeSeparators} argument (default=C{False}), if the separating
+        matching text should be included in the split results.
+        
+        Example::        
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+        prints::
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other ):
+        """
+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement
+        converts them to L{Literal}s by default.
+        
+        Example::
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+        Prints::
+            Hello, World! -> ['Hello', ',', 'World', '!']
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return And( [ self, other ] )
+
+    def __radd__(self, other ):
+        """
+        Implementation of + operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns C{L{And}} with error stop
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other ):
+        """
+        Implementation of - operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self,other):
+        """
+        Implementation of * operator, allows use of C{expr * 3} in place of
+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples
+        may also include C{None} as in:
+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent
+              to C{expr*n + L{ZeroOrMore}(expr)}
+              (read as "at least n instances of C{expr}")
+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}
+              (read as "0 to n instances of C{expr}")
+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}
+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}
+
+        Note that C{expr*(None,n)} does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        C{expr*(None,n)} does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        C{expr*(None,n) + ~expr}
+        """
+        if isinstance(other,int):
+            minElements, optElements = other,0
+        elif isinstance(other,tuple):
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0],int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self*other[0] + ZeroOrMore(self)
+            elif isinstance(other[0],int) and isinstance(other[1],int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
+
+        if (optElements):
+            def makeOptionalList(n):
+                if n>1:
+                    return Optional(self + makeOptionalList(n-1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self]*minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self]*minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other ):
+        """
+        Implementation of | operator - returns C{L{MatchFirst}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst( [ self, other ] )
+
+    def __ror__(self, other ):
+        """
+        Implementation of | operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other ):
+        """
+        Implementation of ^ operator - returns C{L{Or}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Or( [ self, other ] )
+
+    def __rxor__(self, other ):
+        """
+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other ):
+        """
+        Implementation of & operator - returns C{L{Each}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Each( [ self, other ] )
+
+    def __rand__(self, other ):
+        """
+        Implementation of & operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__( self ):
+        """
+        Implementation of ~ operator - returns C{L{NotAny}}
+        """
+        return NotAny( self )
+
+    def __call__(self, name=None):
+        """
+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.
+        
+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be
+        passed as C{True}.
+           
+        If C{name} is omitted, same as calling C{L{copy}}.
+
+        Example::
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             
+        """
+        if name is not None:
+            return self.setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress( self ):
+        """
+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress( self )
+
+    def leaveWhitespace( self ):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        C{ParserElement}'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars( self, chars ):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs( self ):
+        """
+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.
+        Must be called before C{parseString} when the input grammar contains elements that
+        match C{<TAB>} characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore( self, other ):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+        
+        Example::
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+            
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append( Suppress( other.copy() ) )
+        return self
+
+    def setDebugActions( self, startAction, successAction, exceptionAction ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug( self, flag=True ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set C{flag} to True to enable, False to disable.
+
+        Example::
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+            
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+        
+        prints::
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using L{setDebugActions}. Prior to attempting
+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}
+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}
+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.
+        """
+        if flag:
+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
+        else:
+            self.debug = False
+        return self
+
+    def __str__( self ):
+        return self.name
+
+    def __repr__( self ):
+        return _ustr(self)
+
+    def streamline( self ):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        pass
+
+    def validate( self, validateTrace=[] ):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion( [] )
+
+    def parseFile( self, file_or_filename, parseAll=False ):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def __eq__(self,other):
+        if isinstance(other, ParserElement):
+            return self is other or vars(self) == vars(other)
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        else:
+            return super(ParserElement,self)==other
+
+    def __ne__(self,other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(id(self))
+
+    def __req__(self,other):
+        return self == other
+
+    def __rne__(self,other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple 
+        inline microtests of sub expressions while building up larger parser.
+           
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests
+            
+        Example::
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+                
+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+           
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           
+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 
+              string; pass None to disable comment filtering
+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default=C{True}) prints test output to stdout
+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 
+        test's output
+        
+        Example::
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+        prints::
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+            
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+        
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        allResults = []
+        comments = []
+        success = True
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n'.join(comments), t]
+            comments = []
+            try:
+                t = t.replace(r'\n','\n')
+                result = self.parseString(t, parseAll=parseAll)
+                out.append(result.dump(full=fullDump))
+                success = success and not failureTests
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
+                else:
+                    out.append(' '*pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print('\n'.join(out))
+
+            allResults.append((t, result))
+        
+        return success, allResults
+
+        
+class Token(ParserElement):
+    """
+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.
+    """
+    def __init__( self ):
+        super(Token,self).__init__( savelist=False )
+
+
+class Empty(Token):
+    """
+    An empty token, will always match.
+    """
+    def __init__( self ):
+        super(Empty,self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """
+    A token that will never match.
+    """
+    def __init__( self ):
+        super(NoMatch,self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """
+    Token to exactly match a specified string.
+    
+    Example::
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+    
+    For case-insensitive matching, use L{CaselessLiteral}.
+    
+    For keyword matching (force word break before and after the matched string),
+    use L{Keyword} or L{CaselessKeyword}.
+    """
+    def __init__( self, matchString ):
+        super(Literal,self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+    # Performance tuning: this routine gets called a *lot*
+    # if this is a single character match string  and the first character matches,
+    # short-circuit as quickly as possible, and avoid calling startswith
+    #~ @profile
+    def parseImpl( self, instring, loc, doActions=True ):
+        if (instring[loc] == self.firstMatchChar and
+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """
+    Token to exactly match a specified string as a keyword, that is, it must be
+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:
+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.
+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}
+    Accepts two optional constructor arguments in addition to the keyword string:
+     - C{identChars} is a string of characters that would be valid identifier characters,
+          defaulting to all alphanumerics + "_" and "$"
+     - C{caseless} allows case-insensitive matching, default is C{False}.
+       
+    Example::
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use L{CaselessKeyword}.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
+
+    def __init__( self, matchString, identChars=None, caseless=False ):
+        super(Keyword,self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.caseless:
+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        else:
+            if (instring[loc] == self.firstMatchChar and
+                (self.matchLen==1 or instring.startswith(self.match,loc)) and
+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
+                (loc == 0 or instring[loc-1] not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword,self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars( chars ):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """
+    Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessKeyword}.)
+    """
+    def __init__( self, matchString ):
+        super(CaselessLiteral,self).__init__( matchString.upper() )
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[ loc:loc+self.matchLen ].upper() == self.match:
+            return loc+self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of L{Keyword}.
+
+    Example::
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessLiteral}.)
+    """
+    def __init__( self, matchString, identChars=None ):
+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CloseMatch(Token):
+    """
+    A variation on L{Literal} which matches "close" matches, that is, 
+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:
+     - C{match_string} - string to be matched
+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match
+    
+    The results from a successful parse will contain the matched text from the input string and the following named results:
+     - C{mismatches} - a list of the positions within the match_string where mismatches were found
+     - C{original} - the original match_string used to compare against the input string
+    
+    If C{mismatches} is an empty list, then the match was an exact match.
+    
+    Example::
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch,self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
+                src,mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = self.match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """
+    Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters,
+    an optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction. An optional
+    C{excludeChars} parameter can list characters that might be found in 
+    the input C{bodyChars} string; useful to define a word of all printables
+    except for one or two characters, for instance.
+    
+    L{srange} is useful for defining custom character set strings for defining 
+    C{Word} expressions, using range notation from regular expression character sets.
+    
+    A common mistake is to use C{Word} to match a specific literal string, as in 
+    C{Word("Address")}. Remember that C{Word} uses the string argument to define
+    I{sets} of matchable characters. This expression would match "Add", "AAA",
+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.
+    To match an exact literal string, use L{Literal} or L{Keyword}.
+
+    pyparsing includes helper strings for building Words:
+     - L{alphas}
+     - L{nums}
+     - L{alphanums}
+     - L{hexnums}
+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)
+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - L{printables} (any non-whitespace character)
+
+    Example::
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+        
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums+'-')
+        
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+        
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
+        super(Word,self).__init__()
+        if excludeChars:
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars :
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % \
+                                      (re.escape(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % \
+                                      (_escapeRegexRangeChars(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b"+self.reString+r"\b"
+            try:
+                self.re = re.compile( self.reString )
+            except Exception:
+                self.re = None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.re:
+            result = self.re.match(instring,loc)
+            if not result:
+                raise ParseException(instring, loc, self.errmsg, self)
+
+            loc = result.end()
+            return loc, result.group()
+
+        if not(instring[ loc ] in self.initChars):
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, instrlen )
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        if self.asKeyword:
+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(Word,self).__str__()
+        except Exception:
+            pass
+
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s)>4:
+                    return s[:4]+"..."
+                else:
+                    return s
+
+            if ( self.initCharsOrig != self.bodyCharsOrig ):
+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+
+class Regex(Token):
+    r"""
+    Token for matching strings that match a given regular expression.
+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.
+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 
+    named parse results.
+
+    Example::
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+    """
+    compiledREtype = type(re.compile("[A-Z]"))
+    def __init__( self, pattern, flags=0):
+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""
+        super(Regex,self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                        SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                    SyntaxWarning, stacklevel=2)
+                raise
+
+        elif isinstance(pattern, Regex.compiledREtype):
+            self.re = pattern
+            self.pattern = \
+            self.reString = str(pattern)
+            self.flags = flags
+            
+        else:
+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        d = result.groupdict()
+        ret = ParseResults(result.group())
+        if d:
+            for k in d:
+                ret[k] = d[k]
+        return loc,ret
+
+    def __str__( self ):
+        try:
+            return super(Regex,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+    
+    Defined with the following parameters:
+        - quoteChar - string of one or more characters defining the quote delimiting string
+        - escChar - character to escape quotes, typically backslash (default=C{None})
+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})
+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})
+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})
+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})
+
+    Example::
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+    prints::
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString,self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
+                )
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
+
+            if isinstance(ret,basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t' : '\t',
+                        r'\n' : '\n',
+                        r'\f' : '\f',
+                        r'\r' : '\r',
+                    }
+                    for wslit,wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(QuotedString,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """
+    Token for matching words composed of characters I{not} in a given set (will
+    include whitespace in matched characters if not listed in the provided exclusion set - see example).
+    Defined with string containing all disallowed characters, and an optional
+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction.
+
+    Example::
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+    prints::
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__( self, notChars, min=1, max=0, exact=0 ):
+        super(CharsNotIn,self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = ( self.minLen == 0 )
+        self.mayIndexError = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min( start+self.maxLen, len(instring) )
+        while loc < maxlen and \
+              (instring[loc] not in notchars):
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """
+    Special matching class for matching whitespace.  Normally, whitespace is ignored
+    by pyparsing grammars.  This class is included when some whitespace structures
+    are significant.  Define with a string containing the whitespace characters to be
+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,
+    as defined for the C{L{Word}} class.
+    """
+    whiteStrs = {
+        " " : "<SPC>",
+        "\t": "<TAB>",
+        "\n": "<LF>",
+        "\r": "<CR>",
+        "\f": "<FF>",
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White,self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
+        #~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if not(instring[ loc ] in self.matchWhite):
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, len(instring) )
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__( self ):
+        super(_PositionToken,self).__init__()
+        self.name=self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """
+    Token to advance to a specific column of input text; useful for tabular report scraping.
+    """
+    def __init__( self, colno ):
+        super(GoToColumn,self).__init__()
+        self.col = colno
+
+    def preParse( self, instring, loc ):
+        if col(loc,instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables( instring, loc )
+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
+                loc += 1
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        thiscol = col( loc, instring )
+        if thiscol > self.col:
+            raise ParseException( instring, loc, "Text not in expected column", self )
+        newloc = loc + self.col - thiscol
+        ret = instring[ loc: newloc ]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of a line within the parse string
+    
+    Example::
+    
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+    
+    Prints::
+        ['AAA', ' this line']
+        ['AAA', ' and this line']    
+
+    """
+    def __init__( self ):
+        super(LineStart,self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """
+    Matches if current position is at the end of a line within the parse string
+    """
+    def __init__( self ):
+        super(LineEnd,self).__init__()
+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
+        self.errmsg = "Expected end of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc<len(instring):
+            if instring[loc] == "\n":
+                return loc+1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of the parse string
+    """
+    def __init__( self ):
+        super(StringStart,self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse( instring, 0 ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """
+    Matches if current position is at the end of the parse string
+    """
+    def __init__( self ):
+        super(StringEnd,self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """
+    Matches if the current position is at the beginning of a Word, and
+    is not preceded by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of
+    the string being parsed, or at the beginning of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordStart,self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        if loc != 0:
+            if (instring[loc-1] in self.wordChars or
+                instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """
+    Matches if the current position is at the end of a Word, and
+    is not followed by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of
+    the string being parsed, or at the end of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordEnd,self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        instrlen = len(instring)
+        if instrlen>0 and loc<instrlen:
+            if (instring[loc] in self.wordChars or
+                instring[loc-1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """
+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(ParseExpression,self).__init__(savelist)
+        if isinstance( exprs, _generatorType ):
+            exprs = list(exprs)
+
+        if isinstance( exprs, basestring ):
+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
+        elif isinstance( exprs, Iterable ):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if all(isinstance(expr, basestring) for expr in exprs):
+                exprs = map(ParserElement._literalStringClass, exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list( exprs )
+            except TypeError:
+                self.exprs = [ exprs ]
+        self.callPreparse = False
+
+    def __getitem__( self, i ):
+        return self.exprs[i]
+
+    def append( self, other ):
+        self.exprs.append( other )
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace( self ):
+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [ e.copy() for e in self.exprs ]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseExpression, self).ignore( other )
+                for e in self.exprs:
+                    e.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseExpression, self).ignore( other )
+            for e in self.exprs:
+                e.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def __str__( self ):
+        try:
+            return super(ParseExpression,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
+        return self.strRepr
+
+    def streamline( self ):
+        super(ParseExpression,self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if ( len(self.exprs) == 2 ):
+            other = self.exprs[0]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = other.exprs[:] + [ self.exprs[1] ]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+        
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)
+        return ret
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion( [] )
+        
+    def copy(self):
+        ret = super(ParseExpression,self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+class And(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'+'} operator.
+    May also be constructed using the C{'-'} operator, which will suppress backtracking.
+
+    Example::
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"),name_expr("name"),integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop,self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__( self, exprs, savelist = True ):
+        super(And,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars( self.exprs[0].whiteChars )
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse( instring, loc, doActions )
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse( instring, loc, doActions )
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #And( [ self, other ] )
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the expression that matches the longest string will be used.
+    May be constructed using the C{'^'} operator.
+
+    Example::
+        # construct Or using '^' operator
+        
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+    prints::
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(Or,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse( instring, loc )
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            matches.sort(key=lambda x: -x[0])
+            for _,e in matches:
+                try:
+                    return e._parse( instring, loc, doActions )
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #Or( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class MatchFirst(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the first one listed is the one that will match.
+    May be constructed using the C{'|'} operator.
+
+    Example::
+        # construct MatchFirst using '|' operator
+        
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(MatchFirst,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse( instring, loc, doActions )
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #MatchFirst( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class Each(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found, but in any order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'&'} operator.
+
+    Example::
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order 
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+    prints::
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__( self, exprs, savelist = True ):
+        super(Each,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse( instring, tmpLoc )
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e),e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc,results = e._parse(instring,loc,doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class ParseElementEnhance(ParserElement):
+    """
+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(ParseElementEnhance,self).__init__(savelist)
+        if isinstance( expr, basestring ):
+            if issubclass(ParserElement._literalStringClass, Token):
+                expr = ParserElement._literalStringClass(expr)
+            else:
+                expr = ParserElement._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars( expr.whiteChars )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr is not None:
+            return self.expr._parse( instring, loc, doActions, callPreParse=False )
+        else:
+            raise ParseException("",loc,self.errmsg,self)
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseElementEnhance, self).ignore( other )
+                if self.expr is not None:
+                    self.expr.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseElementEnhance, self).ignore( other )
+            if self.expr is not None:
+                self.expr.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def streamline( self ):
+        super(ParseElementEnhance,self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        if self in parseElementList:
+            raise RecursiveGrammarException( parseElementList+[self] )
+        subRecCheckList = parseElementList[:] + [ self ]
+        if self.expr is not None:
+            self.expr.checkRecursion( subRecCheckList )
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion( [] )
+
+    def __str__( self ):
+        try:
+            return super(ParseElementEnhance,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """
+    Lookahead matching of the given parse expression.  C{FollowedBy}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression matches at the current
+    position.  C{FollowedBy} always returns a null token list.
+
+    Example::
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+    prints::
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__( self, expr ):
+        super(FollowedBy,self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self.expr.tryParse( instring, loc )
+        return loc, []
+
+
+class NotAny(ParseElementEnhance):
+    """
+    Lookahead to disallow matching with the given parse expression.  C{NotAny}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression does I{not} match at the current
+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}
+    always returns a null token list.  May be constructed using the '~' operator.
+
+    Example::
+        
+    """
+    def __init__( self, expr ):
+        super(NotAny,self).__init__(expr)
+        #~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__( self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = ParserElement._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+        
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables( instring, loc )
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException,IndexError):
+            pass
+
+        return loc, tokens
+        
+class OneOrMore(_MultipleMatch):
+    """
+    Repetition of one or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+        
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """
+    Optional repetition of zero or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example: similar to L{OneOrMore}
+    """
+    def __init__( self, expr, stopOn=None):
+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+        
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException,IndexError):
+            return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+_optionalNotMatched = _NullToken()
+class Optional(ParseElementEnhance):
+    """
+    Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+            
+            # ZIP+4 form
+            12101-0001
+            
+            # invalid ZIP
+            98765-
+            ''')
+    prints::
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    def __init__( self, expr, default=_optionalNotMatched ):
+        super(Optional,self).__init__( expr, savelist=False )
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
+        except (ParseException,IndexError):
+            if self.defaultValue is not _optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([ self.defaultValue ])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [ self.defaultValue ]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """
+    Token for skipping over all undefined text until the matched expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default=C{False}) if True, the target expression is also parsed 
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 
+          comments) that might contain false matches to the target expression
+     - failOn - (default=C{None}) define expressions that are not allowed to be 
+          included in the skipped test; if found before the target expression is found, 
+          the SkipTo is not a match
+
+    Example::
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP 
+                      + string_data("sev") + SEP 
+                      + string_data("desc") + SEP 
+                      + integer("days_open"))
+        
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+    prints::
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__( self, other, include=False, ignore=None, failOn=None ):
+        super( SkipTo, self ).__init__( other )
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.asList = False
+        if isinstance(failOn, basestring):
+            self.failOn = ParserElement._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+        
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+                    
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+            
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+        
+        if self.includeMatch:
+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """
+    Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.
+
+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.
+    Specifically, '|' has a lower precedence than '<<', so that::
+        fwdExpr << a | b | c
+    will actually be evaluated as::
+        (fwdExpr << a) | b | c
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the C{Forward}::
+        fwdExpr << (a | b | c)
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See L{ParseResults.pprint} for an example of a recursive parser created using
+    C{Forward}.
+    """
+    def __init__( self, other=None ):
+        super(Forward,self).__init__( other, savelist=False )
+
+    def __lshift__( self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars( self.expr.whiteChars )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+        
+    def __ilshift__(self, other):
+        return self << other
+    
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        return self
+
+    def streamline( self ):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate( self, validateTrace=[] ):
+        if self not in validateTrace:
+            tmp = validateTrace[:]+[self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+        return self.__class__.__name__ + ": ..."
+
+        # stubbed out for now - creates awful memory and perf issues
+        self._revertClass = self.__class__
+        self.__class__ = _ForwardNoRecurse
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)
+            else:
+                retString = "None"
+        finally:
+            self.__class__ = self._revertClass
+        return self.__class__.__name__ + ": " + retString
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward,self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+class _ForwardNoRecurse(Forward):
+    def __str__( self ):
+        return "..."
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of C{ParseExpression}, for converting parsed results.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(TokenConverter,self).__init__( expr )#, savelist )
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """
+    Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the input string;
+    this can be disabled by specifying C{'adjacent=False'} in the constructor.
+
+    Example::
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__( self, expr, joinString="", adjacent=True ):
+        super(Combine,self).__init__( expr )
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore( self, other ):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super( Combine, self).ignore( other )
+        return self
+
+    def postParse( self, instring, loc, tokenlist ):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [ retToks ]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """
+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.
+
+    Example::
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__( self, expr ):
+        super(Group,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        return [ tokenlist ]
+
+class Dict(TokenConverter):
+    """
+    Converter to return a repetitive expression as a list, but also as a dictionary.
+    Each element can also be referenced using the first token in the expression as its key.
+    Useful for tabular report scraping when the first column can be used as a item key.
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+        
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])        
+        print(result.asDict())
+    prints::
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+    See more examples at L{ParseResults} of accessing fields by results name.
+    """
+    def __init__( self, expr ):
+        super(Dict,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        for i,tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey,int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok)==1:
+                tokenlist[ikey] = _ParseResultsWithOffset("",i)
+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
+            else:
+                dictvalue = tok.copy() #ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
+
+        if self.resultsName:
+            return [ tokenlist ]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """
+    Converter for ignoring the results of a parsed expression.
+
+    Example::
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+    prints::
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+    (See also L{delimitedList}.)
+    """
+    def postParse( self, instring, loc, tokenlist ):
+        return []
+
+    def suppress( self ):
+        return self
+
+
+class OnlyOnce(object):
+    """
+    Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self,s,l,t):
+        if not self.called:
+            results = self.callable(s,l,t)
+            self.called = True
+            return results
+        raise ParseException(s,l,"")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """
+    Decorator for debugging parse actions. 
+    
+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}
+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+    prints::
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s,l,t = paArgs[-3:]
+        if len(paArgs)>3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
+            raise
+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList( expr, delim=",", combine=False ):
+    """
+    Helper to define a delimited list of expressions - the delimiter defaults to ','.
+    By default, the list elements and delimiters can have intervening whitespace, and
+    comments, but this can be overridden by passing C{combine=True} in the constructor.
+    If C{combine} is set to C{True}, the matching tokens are returned as a single token
+    string, with the delimiters included; otherwise, the matching tokens are returned
+    as a list of tokens, with the delimiters suppressed.
+
+    Example::
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
+    if combine:
+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
+    else:
+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
+
+def countedArray( expr, intExpr=None ):
+    """
+    Helper to define a counted list of expressions.
+    This helper defines a pattern of the form::
+        integer expr expr expr...
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.
+    
+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.
+
+    Example::
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s,l,t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i,list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a
+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.
+    If this is not desired, use C{matchPreviousExpr}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s,l,t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by
+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};
+    the expressions are evaluated first, and then compared, so
+    C{"1"} is compared with C{"10"}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s,l,t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s,l,t):
+            theseTokens = _flatten(t.asList())
+            if  theseTokens != matchTokens:
+                raise ParseException("",0,"")
+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    #~  escape these chars: ^-]
+    for c in r"\^-]":
+        s = s.replace(c,_bslash+c)
+    s = s.replace("\n",r"\n")
+    s = s.replace("\t",r"\t")
+    return _ustr(s)
+
+def oneOf( strs, caseless=False, useRegex=True ):
+    """
+    Helper to quickly define a set of alternative Literals, and makes sure to do
+    longest-first testing when there is a conflict, regardless of the input order,
+    but returns a C{L{MatchFirst}} for best performance.
+
+    Parameters:
+     - strs - a string of space-delimited literals, or a collection of string literals
+     - caseless - (default=C{False}) - treat all literals as caseless
+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex
+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or
+          if creating a C{Regex} raises an exception)
+
+    Example::
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+    prints::
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if caseless:
+        isequal = ( lambda a,b: a.upper() == b.upper() )
+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
+        parseElementClass = CaselessLiteral
+    else:
+        isequal = ( lambda a,b: a == b )
+        masks = ( lambda a,b: b.startswith(a) )
+        parseElementClass = Literal
+
+    symbols = []
+    if isinstance(strs,basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    i = 0
+    while i < len(symbols)-1:
+        cur = symbols[i]
+        for j,other in enumerate(symbols[i+1:]):
+            if ( isequal(other, cur) ):
+                del symbols[i+j+1]
+                break
+            elif ( masks(cur, other) ):
+                del symbols[i+j+1]
+                symbols.insert(i,other)
+                cur = other
+                break
+        else:
+            i += 1
+
+    if not caseless and useRegex:
+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
+        try:
+            if len(symbols)==len("".join(symbols)):
+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
+            else:
+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf( key, value ):
+    """
+    Helper to easily and clearly define a dictionary by specifying the respective patterns
+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens
+    in the proper order.  The key pattern can include delimiting markers or punctuation,
+    as long as they are suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the C{Dict} results can include named token
+    fields.
+
+    Example::
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+    prints::
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict( ZeroOrMore( Group ( key + value ) ) )
+
+def originalTextFor(expr, asString=True):
+    """
+    Helper to return the original, untokenized text for a given expression.  Useful to
+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to
+    revert separate tokens with intervening whitespace back to the original matching
+    input text. By default, returns astring containing the original parsed text.  
+       
+    If the optional C{asString} argument is passed as C{False}, then the return value is a 
+    C{L{ParseResults}} containing any results names that were originally matched, and a 
+    single token containing the original matched text from the input string.  So if 
+    the expression passed to C{L{originalTextFor}} contains expressions with defined
+    results names, you must set C{asString} to C{False} if you want to preserve those
+    results name values.
+
+    Example::
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b","i"):
+            opener,closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+    prints::
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s,l,t: s[t._original_start:t._original_end]
+    else:
+        def extractText(s,l,t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr): 
+    """
+    Helper to undo pyparsing's default grouping of And expressions, even
+    if all but one are non-empty.
+    """
+    return TokenConverter(expr).setParseAction(lambda t:t[0])
+
+def locatedExpr(expr):
+    """
+    Helper to decorate a returned token with its starting and ending locations in the input string.
+    This helper adds the following results names:
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains C{<TAB>} characters, you may want to call
+    C{L{ParserElement.parseWithTabs}}
+
+    Example::
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+    prints::
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s,l,t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
+
+def srange(s):
+    r"""
+    Helper to easily define string ranges for use in Word construction.  Borrows
+    syntax from regexp '[]' string range definitions::
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+    The input string must be enclosed in []'s, and the returned string is the expanded
+    character set joined into a single string.
+    The values enclosed in the []'s may be:
+     - a single character
+     - an escaped character with a leading backslash (such as C{\-} or C{\]})
+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 
+         (C{\0x##} is also supported for backwards compatibility) 
+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)
+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)
+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """
+    Helper method for defining parse actions that require matching at a specific
+    column in the input text.
+    """
+    def verifyCol(strg,locn,toks):
+        if col(locn,strg) != n:
+            raise ParseException(strg,locn,"matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """
+    Helper method for common parse actions that simply return a literal value.  Especially
+    useful when used with C{L{transformString<ParserElement.transformString>}()}.
+
+    Example::
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+        
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s,l,t: [replStr]
+
+def removeQuotes(s,l,t):
+    """
+    Helper parse action for removing quotation marks from parsed quoted strings.
+
+    Example::
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """
+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 
+    args are passed, they are forwarded to the given function as additional arguments after
+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the
+    parsed data to an integer using base 16.
+
+    Example (compare the last to example in L{ParserElement.transformString}::
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+        
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+    prints::
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s,l,t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""
+    
+def _makeTags(tagStr, xml):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr,basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas,alphanums+"_-:")
+    if (xml):
+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    else:
+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \
+                Optional( Suppress("=") + tagAttrValue ) ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    closeTag = Combine(_L("</") + tagStr + ">")
+
+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)
+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches
+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple
+        a,a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+        
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results
+            print(link.link_text, '->', link.href)
+    prints::
+        pyparsing -> http://pyparsing.wikispaces.com
+    """
+    return _makeTags( tagStr, False )
+
+def makeXMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches
+    tags only in the given upper/lower case.
+
+    Example: similar to L{makeHTMLTags}
+    """
+    return _makeTags( tagStr, True )
+
+def withAttribute(*args,**attrDict):
+    """
+    Helper to create a validating parse action to be used with start tags created
+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag
+    with a required attribute value, to avoid false matches on common tags such as
+    C{<TD>} or C{<DIV>}.
+
+    Call C{withAttribute} with a series of attribute names and values. Specify the list
+    of filter attributes names and values as:
+     - keyword arguments, as in C{(align="right")}, or
+     - as an explicit dict with C{**} operator, when an attribute name is also a Python
+          reserved word, as in C{**{"class":"Customer", "align":"right"}}
+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )
+    For attribute names with a namespace prefix, you must use the second form.  Attribute
+    names are matched insensitive to upper/lower case.
+       
+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.
+
+    To verify that the attribute exists, but without specifying a value, pass
+    C{withAttribute.ANY_VALUE} as the value.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k,v) for k,v in attrs]
+    def pa(s,l,tokens):
+        for attrName,attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s,l,"no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """
+    Simplified version of C{L{withAttribute}} when matching on a div class - made
+    difficult because C{class} is a reserved word in Python.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+        
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr : classname})        
+
+opAssoc = _Constants()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
+    """
+    Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary or
+    binary, left- or right-associative.  Parse actions can also be attached
+    to operator expressions. The generated parser will also recognize the use 
+    of parentheses to override operator precedences (see example below).
+    
+    Note: if you define a deep operator list, you may see performance issues
+    when using infixNotation. See L{ParserElement.enablePackrat} for a
+    mechanism to potentially improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the nested
+     - opList - list of tuples, one for each operator precedence level in the
+      expression grammar; each tuple is of the form
+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:
+       - opExpr is the pyparsing expression for the operator;
+          may also be a string, which will be converted to a Literal;
+          if numTerms is 3, opExpr is a tuple of two expressions, for the
+          two operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must
+          be 1, 2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is
+          right or left associative, using the pyparsing-defined
+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.
+       - parseAction is the parse action to be associated with
+          expressions matching this operator expression (the
+          parse action tuple member may be omitted); if the parse action
+          is passed a tuple or list of functions, this is equivalent to
+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})
+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})
+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})
+
+    Example::
+        # simple example of four-function arithmetic with ints and variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier 
+        
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+        
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+    prints::
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    ret = Forward()
+    lastExpr = baseExpr | ( lpar + ret + rpar )
+    for i,operDef in enumerate(opList):
+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """
+    Helper method for defining nested lists enclosed in opening and closing
+    delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression
+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression
+     - content - expression for items within the nested lists (default=C{None})
+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})
+
+    If an expression is not provided for the content argument, the nested
+    expression will capture all whitespace-delimited content between delimiters
+    as a list of separate values.
+
+    Use the C{ignoreExpr} argument to define expressions that may contain
+    opening or closing characters that should not be treated as opening
+    or closing characters for nesting, such as quotedString or a comment
+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.
+    The default is L{quotedString}, but if no expressions are to be ignored,
+    then pass C{None} for this argument.
+
+    Example::
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR,RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type") 
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+        
+        source_code = '''
+            int is_odd(int x) { 
+                return (x%2); 
+            }
+                
+            int dec_to_hex(char hchar) { 
+                if (hchar >= '0' && hchar <= '9') { 
+                    return (ord(hchar)-ord('0')); 
+                } else { 
+                    return (10+ord(hchar)-ord('A'));
+                } 
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+    prints::
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener,basestring) and isinstance(closer,basestring):
+            if len(opener) == 1 and len(closer)==1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
+                                ).setParseAction(lambda t:t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr + 
+                                    ~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
+    else:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
+    ret.setName('nested %s%s expression' % (opener,closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """
+    Helper method for defining space-delimited indentation blocks, such as
+    those used to define block statements in Python source code.
+
+    Parameters:
+     - blockStatementExpr - expression defining syntax of statement that
+            is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+            (multiple statementWithIndentedBlock expressions within a single grammar
+            should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond the
+            the current level; set to False for block of left-most statements
+            (default=C{True})
+
+    A valid block must contain at least one C{blockStatement}.
+
+    Example::
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group( funcDecl + func_body )
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << ( funcDef | assignment | identifier )
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+    prints::
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 
+    """
+    def checkPeerIndent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseFatalException(s,l,"illegal nesting")
+            raise ParseException(s,l,"not a peer entry")
+
+    def checkSubIndent(s,l,t):
+        curCol = col(l,s)
+        if curCol > indentStack[-1]:
+            indentStack.append( curCol )
+        else:
+            raise ParseException(s,l,"not a subentry")
+
+    def checkUnindent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
+            raise ParseException(s,l,"not an unindent")
+        indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group( Optional(NL) +
+            #~ FollowedBy(blockStatementExpr) +
+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
+    else:
+        smExpr = Group( Optional(NL) +
+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form C{/* ... */}"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form C{<!-- ... -->}"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form C{// ... (to end of line)}"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"
+
+javaStyleComment = cppStyleComment
+"Same as C{L{cppStyleComment}}"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form C{# ... (to end of line)}"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
+                                  Optional( Word(" \t") +
+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.
+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """
+    Here are some common low-level expressions that may be useful in jump-starting parser development:
+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})
+     - common L{programming identifiers<identifier>}
+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})
+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}
+     - L{UUID<uuid>}
+     - L{comma-separated list<comma_separated_list>}
+    Parse actions:
+     - C{L{convertToInteger}}
+     - C{L{convertToFloat}}
+     - C{L{convertToDate}}
+     - C{L{convertToDatetime}}
+     - C{L{stripHTMLTags}}
+     - C{L{upcaseTokens}}
+     - C{L{downcaseTokens}}
+
+    Example::
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+    prints::
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+    
+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+    
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+    
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})
+
+        Example::
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+        prints::
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """
+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})
+
+        Example::
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+        prints::
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (C{yyyy-mm-dd})"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """
+        Parse action to remove HTML tags from web page HTML source
+
+        Example::
+            # strip HTML links from normal text 
+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+            td,td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            
+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 
+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+    
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/_vendor/six.py b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/six.py
new file mode 100644
index 0000000..190c023
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/extern/__init__.py b/venv/lib/python3.9/site-packages/pkg_resources/extern/__init__.py
new file mode 100644
index 0000000..c1eb9e9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if prefix and sys.version_info > (3, 3):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'packaging', 'pyparsing', 'six', 'appdirs'
+VendorImporter(__name__, names).install()
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..e6339d6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/extern/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pkg_resources/py31compat.py b/venv/lib/python3.9/site-packages/pkg_resources/py31compat.py
new file mode 100644
index 0000000..a381c42
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pkg_resources/py31compat.py
@@ -0,0 +1,23 @@
+import os
+import errno
+import sys
+
+from .extern import six
+
+
+def _makedirs_31(path, exist_ok=False):
+    try:
+        os.makedirs(path)
+    except OSError as exc:
+        if not exist_ok or exc.errno != errno.EEXIST:
+            raise
+
+
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    six.PY2 or
+    (3, 4) <= sys.version_info < (3, 4, 1)
+)
+makedirs = _makedirs_31 if needs_makedirs else os.makedirs
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/DESCRIPTION.rst b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/DESCRIPTION.rst
new file mode 100644
index 0000000..5e826bd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/DESCRIPTION.rst
@@ -0,0 +1,12 @@
+
+PLY is yet another implementation of lex and yacc for Python. Some notable
+features include the fact that its implemented entirely in Python and it
+uses LALR(1) parsing which is efficient and well suited for larger grammars.
+
+PLY provides most of the standard lex/yacc features including support for empty 
+productions, precedence rules, error recovery, and support for ambiguous grammars. 
+
+PLY is extremely easy to use and provides very extensive error checking. 
+It is compatible with both Python 2 and Python 3.
+
+
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/METADATA b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/METADATA
new file mode 100644
index 0000000..25ed5ab
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/METADATA
@@ -0,0 +1,25 @@
+Metadata-Version: 2.0
+Name: ply
+Version: 3.11
+Summary: Python Lex & Yacc
+Home-page: http://www.dabeaz.com/ply/
+Author: David Beazley
+Author-email: dave@dabeaz.com
+License: BSD
+Description-Content-Type: UNKNOWN
+Platform: UNKNOWN
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 2
+
+
+PLY is yet another implementation of lex and yacc for Python. Some notable
+features include the fact that its implemented entirely in Python and it
+uses LALR(1) parsing which is efficient and well suited for larger grammars.
+
+PLY provides most of the standard lex/yacc features including support for empty 
+productions, precedence rules, error recovery, and support for ambiguous grammars. 
+
+PLY is extremely easy to use and provides very extensive error checking. 
+It is compatible with both Python 2 and Python 3.
+
+
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/RECORD b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/RECORD
new file mode 100644
index 0000000..798fe76
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/RECORD
@@ -0,0 +1,19 @@
+ply-3.11.dist-info/DESCRIPTION.rst,sha256=nnBY1Nj_GhIsOFck7R2yGHobQVosxi2CPQkHgeSZ0Hg,519
+ply-3.11.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4
+ply-3.11.dist-info/METADATA,sha256=pYZ9p1TsWGQ8Kxp9yEJVyvs25PkR5h3gIDuTOCsvJGg,844
+ply-3.11.dist-info/RECORD,,
+ply-3.11.dist-info/WHEEL,sha256=kdsN-5OJAZIiHN-iO4Rhl82KyS0bDWf4uBwMbkNafr8,110
+ply-3.11.dist-info/metadata.json,sha256=s7M7va9E25_7TRpzHfNCfN73Ieiy5iKogF0PzXtMxMI,515
+ply-3.11.dist-info/top_level.txt,sha256=gDYBHRQ7Vy0tY0AjXyJtadvU2LDaOsHqhhV70AGsisc,4
+ply/__init__.py,sha256=sx6iBIF__WKIeU0iw2WSoSqBhclHF5EhBTc0wDigTV8,103
+ply/__pycache__/__init__.cpython-39.pyc,,
+ply/__pycache__/cpp.cpython-39.pyc,,
+ply/__pycache__/ctokens.cpython-39.pyc,,
+ply/__pycache__/lex.cpython-39.pyc,,
+ply/__pycache__/yacc.cpython-39.pyc,,
+ply/__pycache__/ygen.cpython-39.pyc,,
+ply/cpp.py,sha256=KTg13R5SKeicwZm7bIPL44KcQBRcHsmeEGOwIBVvLko,33639
+ply/ctokens.py,sha256=GmyWYDY9nl6F1WJQ9rmcQFgh1FnADFlnp_TBjTcEsqU,3155
+ply/lex.py,sha256=babRISnIAfzHo7WqLYF2qGCSaH0btM8d3ztgHaK3SA0,42905
+ply/yacc.py,sha256=EF043rIHrXJYG6jcb15TI2SLwdCoNOQZXCN_1M3-I4k,137736
+ply/ygen.py,sha256=TRnkZgx5BBB43Qspu2J4gVtpeBut8xrTEZoLbNN0b6M,2246
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/WHEEL b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/WHEEL
new file mode 100644
index 0000000..7332a41
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.30.0)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/metadata.json b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/metadata.json
new file mode 100644
index 0000000..9f472a3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/metadata.json
@@ -0,0 +1 @@
+{"classifiers": ["Programming Language :: Python :: 3", "Programming Language :: Python :: 2"], "description_content_type": "UNKNOWN", "extensions": {"python.details": {"contacts": [{"email": "dave@dabeaz.com", "name": "David Beazley", "role": "author"}], "document_names": {"description": "DESCRIPTION.rst"}, "project_urls": {"Home": "http://www.dabeaz.com/ply/"}}}, "generator": "bdist_wheel (0.30.0)", "license": "BSD", "metadata_version": "2.0", "name": "ply", "summary": "Python Lex & Yacc", "version": "3.11"}
\ No newline at end of file
diff --git a/venv/lib/python3.9/site-packages/ply-3.11.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/top_level.txt
new file mode 100644
index 0000000..90412f0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply-3.11.dist-info/top_level.txt
@@ -0,0 +1 @@
+ply
diff --git a/venv/lib/python3.9/site-packages/ply/__init__.py b/venv/lib/python3.9/site-packages/ply/__init__.py
new file mode 100644
index 0000000..23707c6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__init__.py
@@ -0,0 +1,5 @@
+# PLY package
+# Author: David Beazley (dave@dabeaz.com)
+
+__version__ = '3.11'
+__all__ = ['lex','yacc']
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..f166663
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/cpp.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/cpp.cpython-39.pyc
new file mode 100644
index 0000000..3a9113d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/cpp.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/ctokens.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/ctokens.cpython-39.pyc
new file mode 100644
index 0000000..760502f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/ctokens.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/lex.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/lex.cpython-39.pyc
new file mode 100644
index 0000000..9efbd2f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/lex.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/yacc.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/yacc.cpython-39.pyc
new file mode 100644
index 0000000..b6a3c4d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/yacc.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/__pycache__/ygen.cpython-39.pyc b/venv/lib/python3.9/site-packages/ply/__pycache__/ygen.cpython-39.pyc
new file mode 100644
index 0000000..5f335b6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/__pycache__/ygen.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/ply/cpp.py b/venv/lib/python3.9/site-packages/ply/cpp.py
new file mode 100644
index 0000000..2422916
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/cpp.py
@@ -0,0 +1,914 @@
+# -----------------------------------------------------------------------------
+# cpp.py
+#
+# Author:  David Beazley (http://www.dabeaz.com)
+# Copyright (C) 2007
+# All rights reserved
+#
+# This module implements an ANSI-C style lexical preprocessor for PLY.
+# -----------------------------------------------------------------------------
+from __future__ import generators
+
+import sys
+
+# Some Python 3 compatibility shims
+if sys.version_info.major < 3:
+    STRING_TYPES = (str, unicode)
+else:
+    STRING_TYPES = str
+    xrange = range
+
+# -----------------------------------------------------------------------------
+# Default preprocessor lexer definitions.   These tokens are enough to get
+# a basic preprocessor working.   Other modules may import these if they want
+# -----------------------------------------------------------------------------
+
+tokens = (
+   'CPP_ID','CPP_INTEGER', 'CPP_FLOAT', 'CPP_STRING', 'CPP_CHAR', 'CPP_WS', 'CPP_COMMENT1', 'CPP_COMMENT2', 'CPP_POUND','CPP_DPOUND'
+)
+
+literals = "+-*/%|&~^<>=!?()[]{}.,;:\\\'\""
+
+# Whitespace
+def t_CPP_WS(t):
+    r'\s+'
+    t.lexer.lineno += t.value.count("\n")
+    return t
+
+t_CPP_POUND = r'\#'
+t_CPP_DPOUND = r'\#\#'
+
+# Identifier
+t_CPP_ID = r'[A-Za-z_][\w_]*'
+
+# Integer literal
+def CPP_INTEGER(t):
+    r'(((((0x)|(0X))[0-9a-fA-F]+)|(\d+))([uU][lL]|[lL][uU]|[uU]|[lL])?)'
+    return t
+
+t_CPP_INTEGER = CPP_INTEGER
+
+# Floating literal
+t_CPP_FLOAT = r'((\d+)(\.\d+)(e(\+|-)?(\d+))? | (\d+)e(\+|-)?(\d+))([lL]|[fF])?'
+
+# String literal
+def t_CPP_STRING(t):
+    r'\"([^\\\n]|(\\(.|\n)))*?\"'
+    t.lexer.lineno += t.value.count("\n")
+    return t
+
+# Character constant 'c' or L'c'
+def t_CPP_CHAR(t):
+    r'(L)?\'([^\\\n]|(\\(.|\n)))*?\''
+    t.lexer.lineno += t.value.count("\n")
+    return t
+
+# Comment
+def t_CPP_COMMENT1(t):
+    r'(/\*(.|\n)*?\*/)'
+    ncr = t.value.count("\n")
+    t.lexer.lineno += ncr
+    # replace with one space or a number of '\n'
+    t.type = 'CPP_WS'; t.value = '\n' * ncr if ncr else ' '
+    return t
+
+# Line comment
+def t_CPP_COMMENT2(t):
+    r'(//.*?(\n|$))'
+    # replace with '/n'
+    t.type = 'CPP_WS'; t.value = '\n'
+    return t
+
+def t_error(t):
+    t.type = t.value[0]
+    t.value = t.value[0]
+    t.lexer.skip(1)
+    return t
+
+import re
+import copy
+import time
+import os.path
+
+# -----------------------------------------------------------------------------
+# trigraph()
+#
+# Given an input string, this function replaces all trigraph sequences.
+# The following mapping is used:
+#
+#     ??=    #
+#     ??/    \
+#     ??'    ^
+#     ??(    [
+#     ??)    ]
+#     ??!    |
+#     ??<    {
+#     ??>    }
+#     ??-    ~
+# -----------------------------------------------------------------------------
+
+_trigraph_pat = re.compile(r'''\?\?[=/\'\(\)\!<>\-]''')
+_trigraph_rep = {
+    '=':'#',
+    '/':'\\',
+    "'":'^',
+    '(':'[',
+    ')':']',
+    '!':'|',
+    '<':'{',
+    '>':'}',
+    '-':'~'
+}
+
+def trigraph(input):
+    return _trigraph_pat.sub(lambda g: _trigraph_rep[g.group()[-1]],input)
+
+# ------------------------------------------------------------------
+# Macro object
+#
+# This object holds information about preprocessor macros
+#
+#    .name      - Macro name (string)
+#    .value     - Macro value (a list of tokens)
+#    .arglist   - List of argument names
+#    .variadic  - Boolean indicating whether or not variadic macro
+#    .vararg    - Name of the variadic parameter
+#
+# When a macro is created, the macro replacement token sequence is
+# pre-scanned and used to create patch lists that are later used
+# during macro expansion
+# ------------------------------------------------------------------
+
+class Macro(object):
+    def __init__(self,name,value,arglist=None,variadic=False):
+        self.name = name
+        self.value = value
+        self.arglist = arglist
+        self.variadic = variadic
+        if variadic:
+            self.vararg = arglist[-1]
+        self.source = None
+
+# ------------------------------------------------------------------
+# Preprocessor object
+#
+# Object representing a preprocessor.  Contains macro definitions,
+# include directories, and other information
+# ------------------------------------------------------------------
+
+class Preprocessor(object):
+    def __init__(self,lexer=None):
+        if lexer is None:
+            lexer = lex.lexer
+        self.lexer = lexer
+        self.macros = { }
+        self.path = []
+        self.temp_path = []
+
+        # Probe the lexer for selected tokens
+        self.lexprobe()
+
+        tm = time.localtime()
+        self.define("__DATE__ \"%s\"" % time.strftime("%b %d %Y",tm))
+        self.define("__TIME__ \"%s\"" % time.strftime("%H:%M:%S",tm))
+        self.parser = None
+
+    # -----------------------------------------------------------------------------
+    # tokenize()
+    #
+    # Utility function. Given a string of text, tokenize into a list of tokens
+    # -----------------------------------------------------------------------------
+
+    def tokenize(self,text):
+        tokens = []
+        self.lexer.input(text)
+        while True:
+            tok = self.lexer.token()
+            if not tok: break
+            tokens.append(tok)
+        return tokens
+
+    # ---------------------------------------------------------------------
+    # error()
+    #
+    # Report a preprocessor error/warning of some kind
+    # ----------------------------------------------------------------------
+
+    def error(self,file,line,msg):
+        print("%s:%d %s" % (file,line,msg))
+
+    # ----------------------------------------------------------------------
+    # lexprobe()
+    #
+    # This method probes the preprocessor lexer object to discover
+    # the token types of symbols that are important to the preprocessor.
+    # If this works right, the preprocessor will simply "work"
+    # with any suitable lexer regardless of how tokens have been named.
+    # ----------------------------------------------------------------------
+
+    def lexprobe(self):
+
+        # Determine the token type for identifiers
+        self.lexer.input("identifier")
+        tok = self.lexer.token()
+        if not tok or tok.value != "identifier":
+            print("Couldn't determine identifier type")
+        else:
+            self.t_ID = tok.type
+
+        # Determine the token type for integers
+        self.lexer.input("12345")
+        tok = self.lexer.token()
+        if not tok or int(tok.value) != 12345:
+            print("Couldn't determine integer type")
+        else:
+            self.t_INTEGER = tok.type
+            self.t_INTEGER_TYPE = type(tok.value)
+
+        # Determine the token type for strings enclosed in double quotes
+        self.lexer.input("\"filename\"")
+        tok = self.lexer.token()
+        if not tok or tok.value != "\"filename\"":
+            print("Couldn't determine string type")
+        else:
+            self.t_STRING = tok.type
+
+        # Determine the token type for whitespace--if any
+        self.lexer.input("  ")
+        tok = self.lexer.token()
+        if not tok or tok.value != "  ":
+            self.t_SPACE = None
+        else:
+            self.t_SPACE = tok.type
+
+        # Determine the token type for newlines
+        self.lexer.input("\n")
+        tok = self.lexer.token()
+        if not tok or tok.value != "\n":
+            self.t_NEWLINE = None
+            print("Couldn't determine token for newlines")
+        else:
+            self.t_NEWLINE = tok.type
+
+        self.t_WS = (self.t_SPACE, self.t_NEWLINE)
+
+        # Check for other characters used by the preprocessor
+        chars = [ '<','>','#','##','\\','(',')',',','.']
+        for c in chars:
+            self.lexer.input(c)
+            tok = self.lexer.token()
+            if not tok or tok.value != c:
+                print("Unable to lex '%s' required for preprocessor" % c)
+
+    # ----------------------------------------------------------------------
+    # add_path()
+    #
+    # Adds a search path to the preprocessor.
+    # ----------------------------------------------------------------------
+
+    def add_path(self,path):
+        self.path.append(path)
+
+    # ----------------------------------------------------------------------
+    # group_lines()
+    #
+    # Given an input string, this function splits it into lines.  Trailing whitespace
+    # is removed.   Any line ending with \ is grouped with the next line.  This
+    # function forms the lowest level of the preprocessor---grouping into text into
+    # a line-by-line format.
+    # ----------------------------------------------------------------------
+
+    def group_lines(self,input):
+        lex = self.lexer.clone()
+        lines = [x.rstrip() for x in input.splitlines()]
+        for i in xrange(len(lines)):
+            j = i+1
+            while lines[i].endswith('\\') and (j < len(lines)):
+                lines[i] = lines[i][:-1]+lines[j]
+                lines[j] = ""
+                j += 1
+
+        input = "\n".join(lines)
+        lex.input(input)
+        lex.lineno = 1
+
+        current_line = []
+        while True:
+            tok = lex.token()
+            if not tok:
+                break
+            current_line.append(tok)
+            if tok.type in self.t_WS and '\n' in tok.value:
+                yield current_line
+                current_line = []
+
+        if current_line:
+            yield current_line
+
+    # ----------------------------------------------------------------------
+    # tokenstrip()
+    #
+    # Remove leading/trailing whitespace tokens from a token list
+    # ----------------------------------------------------------------------
+
+    def tokenstrip(self,tokens):
+        i = 0
+        while i < len(tokens) and tokens[i].type in self.t_WS:
+            i += 1
+        del tokens[:i]
+        i = len(tokens)-1
+        while i >= 0 and tokens[i].type in self.t_WS:
+            i -= 1
+        del tokens[i+1:]
+        return tokens
+
+
+    # ----------------------------------------------------------------------
+    # collect_args()
+    #
+    # Collects comma separated arguments from a list of tokens.   The arguments
+    # must be enclosed in parenthesis.  Returns a tuple (tokencount,args,positions)
+    # where tokencount is the number of tokens consumed, args is a list of arguments,
+    # and positions is a list of integers containing the starting index of each
+    # argument.  Each argument is represented by a list of tokens.
+    #
+    # When collecting arguments, leading and trailing whitespace is removed
+    # from each argument.
+    #
+    # This function properly handles nested parenthesis and commas---these do not
+    # define new arguments.
+    # ----------------------------------------------------------------------
+
+    def collect_args(self,tokenlist):
+        args = []
+        positions = []
+        current_arg = []
+        nesting = 1
+        tokenlen = len(tokenlist)
+
+        # Search for the opening '('.
+        i = 0
+        while (i < tokenlen) and (tokenlist[i].type in self.t_WS):
+            i += 1
+
+        if (i < tokenlen) and (tokenlist[i].value == '('):
+            positions.append(i+1)
+        else:
+            self.error(self.source,tokenlist[0].lineno,"Missing '(' in macro arguments")
+            return 0, [], []
+
+        i += 1
+
+        while i < tokenlen:
+            t = tokenlist[i]
+            if t.value == '(':
+                current_arg.append(t)
+                nesting += 1
+            elif t.value == ')':
+                nesting -= 1
+                if nesting == 0:
+                    if current_arg:
+                        args.append(self.tokenstrip(current_arg))
+                        positions.append(i)
+                    return i+1,args,positions
+                current_arg.append(t)
+            elif t.value == ',' and nesting == 1:
+                args.append(self.tokenstrip(current_arg))
+                positions.append(i+1)
+                current_arg = []
+            else:
+                current_arg.append(t)
+            i += 1
+
+        # Missing end argument
+        self.error(self.source,tokenlist[-1].lineno,"Missing ')' in macro arguments")
+        return 0, [],[]
+
+    # ----------------------------------------------------------------------
+    # macro_prescan()
+    #
+    # Examine the macro value (token sequence) and identify patch points
+    # This is used to speed up macro expansion later on---we'll know
+    # right away where to apply patches to the value to form the expansion
+    # ----------------------------------------------------------------------
+
+    def macro_prescan(self,macro):
+        macro.patch     = []             # Standard macro arguments
+        macro.str_patch = []             # String conversion expansion
+        macro.var_comma_patch = []       # Variadic macro comma patch
+        i = 0
+        while i < len(macro.value):
+            if macro.value[i].type == self.t_ID and macro.value[i].value in macro.arglist:
+                argnum = macro.arglist.index(macro.value[i].value)
+                # Conversion of argument to a string
+                if i > 0 and macro.value[i-1].value == '#':
+                    macro.value[i] = copy.copy(macro.value[i])
+                    macro.value[i].type = self.t_STRING
+                    del macro.value[i-1]
+                    macro.str_patch.append((argnum,i-1))
+                    continue
+                # Concatenation
+                elif (i > 0 and macro.value[i-1].value == '##'):
+                    macro.patch.append(('c',argnum,i-1))
+                    del macro.value[i-1]
+                    i -= 1
+                    continue
+                elif ((i+1) < len(macro.value) and macro.value[i+1].value == '##'):
+                    macro.patch.append(('c',argnum,i))
+                    del macro.value[i + 1]
+                    continue
+                # Standard expansion
+                else:
+                    macro.patch.append(('e',argnum,i))
+            elif macro.value[i].value == '##':
+                if macro.variadic and (i > 0) and (macro.value[i-1].value == ',') and \
+                        ((i+1) < len(macro.value)) and (macro.value[i+1].type == self.t_ID) and \
+                        (macro.value[i+1].value == macro.vararg):
+                    macro.var_comma_patch.append(i-1)
+            i += 1
+        macro.patch.sort(key=lambda x: x[2],reverse=True)
+
+    # ----------------------------------------------------------------------
+    # macro_expand_args()
+    #
+    # Given a Macro and list of arguments (each a token list), this method
+    # returns an expanded version of a macro.  The return value is a token sequence
+    # representing the replacement macro tokens
+    # ----------------------------------------------------------------------
+
+    def macro_expand_args(self,macro,args):
+        # Make a copy of the macro token sequence
+        rep = [copy.copy(_x) for _x in macro.value]
+
+        # Make string expansion patches.  These do not alter the length of the replacement sequence
+
+        str_expansion = {}
+        for argnum, i in macro.str_patch:
+            if argnum not in str_expansion:
+                str_expansion[argnum] = ('"%s"' % "".join([x.value for x in args[argnum]])).replace("\\","\\\\")
+            rep[i] = copy.copy(rep[i])
+            rep[i].value = str_expansion[argnum]
+
+        # Make the variadic macro comma patch.  If the variadic macro argument is empty, we get rid
+        comma_patch = False
+        if macro.variadic and not args[-1]:
+            for i in macro.var_comma_patch:
+                rep[i] = None
+                comma_patch = True
+
+        # Make all other patches.   The order of these matters.  It is assumed that the patch list
+        # has been sorted in reverse order of patch location since replacements will cause the
+        # size of the replacement sequence to expand from the patch point.
+
+        expanded = { }
+        for ptype, argnum, i in macro.patch:
+            # Concatenation.   Argument is left unexpanded
+            if ptype == 'c':
+                rep[i:i+1] = args[argnum]
+            # Normal expansion.  Argument is macro expanded first
+            elif ptype == 'e':
+                if argnum not in expanded:
+                    expanded[argnum] = self.expand_macros(args[argnum])
+                rep[i:i+1] = expanded[argnum]
+
+        # Get rid of removed comma if necessary
+        if comma_patch:
+            rep = [_i for _i in rep if _i]
+
+        return rep
+
+
+    # ----------------------------------------------------------------------
+    # expand_macros()
+    #
+    # Given a list of tokens, this function performs macro expansion.
+    # The expanded argument is a dictionary that contains macros already
+    # expanded.  This is used to prevent infinite recursion.
+    # ----------------------------------------------------------------------
+
+    def expand_macros(self,tokens,expanded=None):
+        if expanded is None:
+            expanded = {}
+        i = 0
+        while i < len(tokens):
+            t = tokens[i]
+            if t.type == self.t_ID:
+                if t.value in self.macros and t.value not in expanded:
+                    # Yes, we found a macro match
+                    expanded[t.value] = True
+
+                    m = self.macros[t.value]
+                    if not m.arglist:
+                        # A simple macro
+                        ex = self.expand_macros([copy.copy(_x) for _x in m.value],expanded)
+                        for e in ex:
+                            e.lineno = t.lineno
+                        tokens[i:i+1] = ex
+                        i += len(ex)
+                    else:
+                        # A macro with arguments
+                        j = i + 1
+                        while j < len(tokens) and tokens[j].type in self.t_WS:
+                            j += 1
+                        if j < len(tokens) and tokens[j].value == '(':
+                            tokcount,args,positions = self.collect_args(tokens[j:])
+                            if not m.variadic and len(args) !=  len(m.arglist):
+                                self.error(self.source,t.lineno,"Macro %s requires %d arguments" % (t.value,len(m.arglist)))
+                                i = j + tokcount
+                            elif m.variadic and len(args) < len(m.arglist)-1:
+                                if len(m.arglist) > 2:
+                                    self.error(self.source,t.lineno,"Macro %s must have at least %d arguments" % (t.value, len(m.arglist)-1))
+                                else:
+                                    self.error(self.source,t.lineno,"Macro %s must have at least %d argument" % (t.value, len(m.arglist)-1))
+                                i = j + tokcount
+                            else:
+                                if m.variadic:
+                                    if len(args) == len(m.arglist)-1:
+                                        args.append([])
+                                    else:
+                                        args[len(m.arglist)-1] = tokens[j+positions[len(m.arglist)-1]:j+tokcount-1]
+                                        del args[len(m.arglist):]
+
+                                # Get macro replacement text
+                                rep = self.macro_expand_args(m,args)
+                                rep = self.expand_macros(rep,expanded)
+                                for r in rep:
+                                    r.lineno = t.lineno
+                                tokens[i:j+tokcount] = rep
+                                i += len(rep)
+                        else:
+                            # This is not a macro. It is just a word which
+                            # equals to name of the macro. Hence, go to the
+                            # next token.
+                            i += 1
+
+                    del expanded[t.value]
+                    continue
+                elif t.value == '__LINE__':
+                    t.type = self.t_INTEGER
+                    t.value = self.t_INTEGER_TYPE(t.lineno)
+
+            i += 1
+        return tokens
+
+    # ----------------------------------------------------------------------
+    # evalexpr()
+    #
+    # Evaluate an expression token sequence for the purposes of evaluating
+    # integral expressions.
+    # ----------------------------------------------------------------------
+
+    def evalexpr(self,tokens):
+        # tokens = tokenize(line)
+        # Search for defined macros
+        i = 0
+        while i < len(tokens):
+            if tokens[i].type == self.t_ID and tokens[i].value == 'defined':
+                j = i + 1
+                needparen = False
+                result = "0L"
+                while j < len(tokens):
+                    if tokens[j].type in self.t_WS:
+                        j += 1
+                        continue
+                    elif tokens[j].type == self.t_ID:
+                        if tokens[j].value in self.macros:
+                            result = "1L"
+                        else:
+                            result = "0L"
+                        if not needparen: break
+                    elif tokens[j].value == '(':
+                        needparen = True
+                    elif tokens[j].value == ')':
+                        break
+                    else:
+                        self.error(self.source,tokens[i].lineno,"Malformed defined()")
+                    j += 1
+                tokens[i].type = self.t_INTEGER
+                tokens[i].value = self.t_INTEGER_TYPE(result)
+                del tokens[i+1:j+1]
+            i += 1
+        tokens = self.expand_macros(tokens)
+        for i,t in enumerate(tokens):
+            if t.type == self.t_ID:
+                tokens[i] = copy.copy(t)
+                tokens[i].type = self.t_INTEGER
+                tokens[i].value = self.t_INTEGER_TYPE("0L")
+            elif t.type == self.t_INTEGER:
+                tokens[i] = copy.copy(t)
+                # Strip off any trailing suffixes
+                tokens[i].value = str(tokens[i].value)
+                while tokens[i].value[-1] not in "0123456789abcdefABCDEF":
+                    tokens[i].value = tokens[i].value[:-1]
+
+        expr = "".join([str(x.value) for x in tokens])
+        expr = expr.replace("&&"," and ")
+        expr = expr.replace("||"," or ")
+        expr = expr.replace("!"," not ")
+        try:
+            result = eval(expr)
+        except Exception:
+            self.error(self.source,tokens[0].lineno,"Couldn't evaluate expression")
+            result = 0
+        return result
+
+    # ----------------------------------------------------------------------
+    # parsegen()
+    #
+    # Parse an input string/
+    # ----------------------------------------------------------------------
+    def parsegen(self,input,source=None):
+
+        # Replace trigraph sequences
+        t = trigraph(input)
+        lines = self.group_lines(t)
+
+        if not source:
+            source = ""
+
+        self.define("__FILE__ \"%s\"" % source)
+
+        self.source = source
+        chunk = []
+        enable = True
+        iftrigger = False
+        ifstack = []
+
+        for x in lines:
+            for i,tok in enumerate(x):
+                if tok.type not in self.t_WS: break
+            if tok.value == '#':
+                # Preprocessor directive
+
+                # insert necessary whitespace instead of eaten tokens
+                for tok in x:
+                    if tok.type in self.t_WS and '\n' in tok.value:
+                        chunk.append(tok)
+
+                dirtokens = self.tokenstrip(x[i+1:])
+                if dirtokens:
+                    name = dirtokens[0].value
+                    args = self.tokenstrip(dirtokens[1:])
+                else:
+                    name = ""
+                    args = []
+
+                if name == 'define':
+                    if enable:
+                        for tok in self.expand_macros(chunk):
+                            yield tok
+                        chunk = []
+                        self.define(args)
+                elif name == 'include':
+                    if enable:
+                        for tok in self.expand_macros(chunk):
+                            yield tok
+                        chunk = []
+                        oldfile = self.macros['__FILE__']
+                        for tok in self.include(args):
+                            yield tok
+                        self.macros['__FILE__'] = oldfile
+                        self.source = source
+                elif name == 'undef':
+                    if enable:
+                        for tok in self.expand_macros(chunk):
+                            yield tok
+                        chunk = []
+                        self.undef(args)
+                elif name == 'ifdef':
+                    ifstack.append((enable,iftrigger))
+                    if enable:
+                        if not args[0].value in self.macros:
+                            enable = False
+                            iftrigger = False
+                        else:
+                            iftrigger = True
+                elif name == 'ifndef':
+                    ifstack.append((enable,iftrigger))
+                    if enable:
+                        if args[0].value in self.macros:
+                            enable = False
+                            iftrigger = False
+                        else:
+                            iftrigger = True
+                elif name == 'if':
+                    ifstack.append((enable,iftrigger))
+                    if enable:
+                        result = self.evalexpr(args)
+                        if not result:
+                            enable = False
+                            iftrigger = False
+                        else:
+                            iftrigger = True
+                elif name == 'elif':
+                    if ifstack:
+                        if ifstack[-1][0]:     # We only pay attention if outer "if" allows this
+                            if enable:         # If already true, we flip enable False
+                                enable = False
+                            elif not iftrigger:   # If False, but not triggered yet, we'll check expression
+                                result = self.evalexpr(args)
+                                if result:
+                                    enable  = True
+                                    iftrigger = True
+                    else:
+                        self.error(self.source,dirtokens[0].lineno,"Misplaced #elif")
+
+                elif name == 'else':
+                    if ifstack:
+                        if ifstack[-1][0]:
+                            if enable:
+                                enable = False
+                            elif not iftrigger:
+                                enable = True
+                                iftrigger = True
+                    else:
+                        self.error(self.source,dirtokens[0].lineno,"Misplaced #else")
+
+                elif name == 'endif':
+                    if ifstack:
+                        enable,iftrigger = ifstack.pop()
+                    else:
+                        self.error(self.source,dirtokens[0].lineno,"Misplaced #endif")
+                else:
+                    # Unknown preprocessor directive
+                    pass
+
+            else:
+                # Normal text
+                if enable:
+                    chunk.extend(x)
+
+        for tok in self.expand_macros(chunk):
+            yield tok
+        chunk = []
+
+    # ----------------------------------------------------------------------
+    # include()
+    #
+    # Implementation of file-inclusion
+    # ----------------------------------------------------------------------
+
+    def include(self,tokens):
+        # Try to extract the filename and then process an include file
+        if not tokens:
+            return
+        if tokens:
+            if tokens[0].value != '<' and tokens[0].type != self.t_STRING:
+                tokens = self.expand_macros(tokens)
+
+            if tokens[0].value == '<':
+                # Include <...>
+                i = 1
+                while i < len(tokens):
+                    if tokens[i].value == '>':
+                        break
+                    i += 1
+                else:
+                    print("Malformed #include <...>")
+                    return
+                filename = "".join([x.value for x in tokens[1:i]])
+                path = self.path + [""] + self.temp_path
+            elif tokens[0].type == self.t_STRING:
+                filename = tokens[0].value[1:-1]
+                path = self.temp_path + [""] + self.path
+            else:
+                print("Malformed #include statement")
+                return
+        for p in path:
+            iname = os.path.join(p,filename)
+            try:
+                data = open(iname,"r").read()
+                dname = os.path.dirname(iname)
+                if dname:
+                    self.temp_path.insert(0,dname)
+                for tok in self.parsegen(data,filename):
+                    yield tok
+                if dname:
+                    del self.temp_path[0]
+                break
+            except IOError:
+                pass
+        else:
+            print("Couldn't find '%s'" % filename)
+
+    # ----------------------------------------------------------------------
+    # define()
+    #
+    # Define a new macro
+    # ----------------------------------------------------------------------
+
+    def define(self,tokens):
+        if isinstance(tokens,STRING_TYPES):
+            tokens = self.tokenize(tokens)
+
+        linetok = tokens
+        try:
+            name = linetok[0]
+            if len(linetok) > 1:
+                mtype = linetok[1]
+            else:
+                mtype = None
+            if not mtype:
+                m = Macro(name.value,[])
+                self.macros[name.value] = m
+            elif mtype.type in self.t_WS:
+                # A normal macro
+                m = Macro(name.value,self.tokenstrip(linetok[2:]))
+                self.macros[name.value] = m
+            elif mtype.value == '(':
+                # A macro with arguments
+                tokcount, args, positions = self.collect_args(linetok[1:])
+                variadic = False
+                for a in args:
+                    if variadic:
+                        print("No more arguments may follow a variadic argument")
+                        break
+                    astr = "".join([str(_i.value) for _i in a])
+                    if astr == "...":
+                        variadic = True
+                        a[0].type = self.t_ID
+                        a[0].value = '__VA_ARGS__'
+                        variadic = True
+                        del a[1:]
+                        continue
+                    elif astr[-3:] == "..." and a[0].type == self.t_ID:
+                        variadic = True
+                        del a[1:]
+                        # If, for some reason, "." is part of the identifier, strip off the name for the purposes
+                        # of macro expansion
+                        if a[0].value[-3:] == '...':
+                            a[0].value = a[0].value[:-3]
+                        continue
+                    if len(a) > 1 or a[0].type != self.t_ID:
+                        print("Invalid macro argument")
+                        break
+                else:
+                    mvalue = self.tokenstrip(linetok[1+tokcount:])
+                    i = 0
+                    while i < len(mvalue):
+                        if i+1 < len(mvalue):
+                            if mvalue[i].type in self.t_WS and mvalue[i+1].value == '##':
+                                del mvalue[i]
+                                continue
+                            elif mvalue[i].value == '##' and mvalue[i+1].type in self.t_WS:
+                                del mvalue[i+1]
+                        i += 1
+                    m = Macro(name.value,mvalue,[x[0].value for x in args],variadic)
+                    self.macro_prescan(m)
+                    self.macros[name.value] = m
+            else:
+                print("Bad macro definition")
+        except LookupError:
+            print("Bad macro definition")
+
+    # ----------------------------------------------------------------------
+    # undef()
+    #
+    # Undefine a macro
+    # ----------------------------------------------------------------------
+
+    def undef(self,tokens):
+        id = tokens[0].value
+        try:
+            del self.macros[id]
+        except LookupError:
+            pass
+
+    # ----------------------------------------------------------------------
+    # parse()
+    #
+    # Parse input text.
+    # ----------------------------------------------------------------------
+    def parse(self,input,source=None,ignore={}):
+        self.ignore = ignore
+        self.parser = self.parsegen(input,source)
+
+    # ----------------------------------------------------------------------
+    # token()
+    #
+    # Method to return individual tokens
+    # ----------------------------------------------------------------------
+    def token(self):
+        try:
+            while True:
+                tok = next(self.parser)
+                if tok.type not in self.ignore: return tok
+        except StopIteration:
+            self.parser = None
+            return None
+
+if __name__ == '__main__':
+    import ply.lex as lex
+    lexer = lex.lex()
+
+    # Run a preprocessor
+    import sys
+    f = open(sys.argv[1])
+    input = f.read()
+
+    p = Preprocessor(lexer)
+    p.parse(input,sys.argv[1])
+    while True:
+        tok = p.token()
+        if not tok: break
+        print(p.source, tok)
diff --git a/venv/lib/python3.9/site-packages/ply/ctokens.py b/venv/lib/python3.9/site-packages/ply/ctokens.py
new file mode 100644
index 0000000..b265e59
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/ctokens.py
@@ -0,0 +1,127 @@
+# ----------------------------------------------------------------------
+# ctokens.py
+#
+# Token specifications for symbols in ANSI C and C++.  This file is
+# meant to be used as a library in other tokenizers.
+# ----------------------------------------------------------------------
+
+# Reserved words
+
+tokens = [
+    # Literals (identifier, integer constant, float constant, string constant, char const)
+    'ID', 'TYPEID', 'INTEGER', 'FLOAT', 'STRING', 'CHARACTER',
+
+    # Operators (+,-,*,/,%,|,&,~,^,<<,>>, ||, &&, !, <, <=, >, >=, ==, !=)
+    'PLUS', 'MINUS', 'TIMES', 'DIVIDE', 'MODULO',
+    'OR', 'AND', 'NOT', 'XOR', 'LSHIFT', 'RSHIFT',
+    'LOR', 'LAND', 'LNOT',
+    'LT', 'LE', 'GT', 'GE', 'EQ', 'NE',
+
+    # Assignment (=, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=)
+    'EQUALS', 'TIMESEQUAL', 'DIVEQUAL', 'MODEQUAL', 'PLUSEQUAL', 'MINUSEQUAL',
+    'LSHIFTEQUAL','RSHIFTEQUAL', 'ANDEQUAL', 'XOREQUAL', 'OREQUAL',
+
+    # Increment/decrement (++,--)
+    'INCREMENT', 'DECREMENT',
+
+    # Structure dereference (->)
+    'ARROW',
+
+    # Ternary operator (?)
+    'TERNARY',
+
+    # Delimeters ( ) [ ] { } , . ; :
+    'LPAREN', 'RPAREN',
+    'LBRACKET', 'RBRACKET',
+    'LBRACE', 'RBRACE',
+    'COMMA', 'PERIOD', 'SEMI', 'COLON',
+
+    # Ellipsis (...)
+    'ELLIPSIS',
+]
+
+# Operators
+t_PLUS             = r'\+'
+t_MINUS            = r'-'
+t_TIMES            = r'\*'
+t_DIVIDE           = r'/'
+t_MODULO           = r'%'
+t_OR               = r'\|'
+t_AND              = r'&'
+t_NOT              = r'~'
+t_XOR              = r'\^'
+t_LSHIFT           = r'<<'
+t_RSHIFT           = r'>>'
+t_LOR              = r'\|\|'
+t_LAND             = r'&&'
+t_LNOT             = r'!'
+t_LT               = r'<'
+t_GT               = r'>'
+t_LE               = r'<='
+t_GE               = r'>='
+t_EQ               = r'=='
+t_NE               = r'!='
+
+# Assignment operators
+
+t_EQUALS           = r'='
+t_TIMESEQUAL       = r'\*='
+t_DIVEQUAL         = r'/='
+t_MODEQUAL         = r'%='
+t_PLUSEQUAL        = r'\+='
+t_MINUSEQUAL       = r'-='
+t_LSHIFTEQUAL      = r'<<='
+t_RSHIFTEQUAL      = r'>>='
+t_ANDEQUAL         = r'&='
+t_OREQUAL          = r'\|='
+t_XOREQUAL         = r'\^='
+
+# Increment/decrement
+t_INCREMENT        = r'\+\+'
+t_DECREMENT        = r'--'
+
+# ->
+t_ARROW            = r'->'
+
+# ?
+t_TERNARY          = r'\?'
+
+# Delimeters
+t_LPAREN           = r'\('
+t_RPAREN           = r'\)'
+t_LBRACKET         = r'\['
+t_RBRACKET         = r'\]'
+t_LBRACE           = r'\{'
+t_RBRACE           = r'\}'
+t_COMMA            = r','
+t_PERIOD           = r'\.'
+t_SEMI             = r';'
+t_COLON            = r':'
+t_ELLIPSIS         = r'\.\.\.'
+
+# Identifiers
+t_ID = r'[A-Za-z_][A-Za-z0-9_]*'
+
+# Integer literal
+t_INTEGER = r'\d+([uU]|[lL]|[uU][lL]|[lL][uU])?'
+
+# Floating literal
+t_FLOAT = r'((\d+)(\.\d+)(e(\+|-)?(\d+))? | (\d+)e(\+|-)?(\d+))([lL]|[fF])?'
+
+# String literal
+t_STRING = r'\"([^\\\n]|(\\.))*?\"'
+
+# Character constant 'c' or L'c'
+t_CHARACTER = r'(L)?\'([^\\\n]|(\\.))*?\''
+
+# Comment (C-Style)
+def t_COMMENT(t):
+    r'/\*(.|\n)*?\*/'
+    t.lexer.lineno += t.value.count('\n')
+    return t
+
+# Comment (C++-Style)
+def t_CPPCOMMENT(t):
+    r'//.*\n'
+    t.lexer.lineno += 1
+    return t
diff --git a/venv/lib/python3.9/site-packages/ply/lex.py b/venv/lib/python3.9/site-packages/ply/lex.py
new file mode 100644
index 0000000..f95bcdb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/lex.py
@@ -0,0 +1,1098 @@
+# -----------------------------------------------------------------------------
+# ply: lex.py
+#
+# Copyright (C) 2001-2018
+# David M. Beazley (Dabeaz LLC)
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+#   this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+# * Neither the name of the David Beazley or Dabeaz LLC may be used to
+#   endorse or promote products derived from this software without
+#  specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -----------------------------------------------------------------------------
+
+__version__    = '3.11'
+__tabversion__ = '3.10'
+
+import re
+import sys
+import types
+import copy
+import os
+import inspect
+
+# This tuple contains known string types
+try:
+    # Python 2.6
+    StringTypes = (types.StringType, types.UnicodeType)
+except AttributeError:
+    # Python 3.0
+    StringTypes = (str, bytes)
+
+# This regular expression is used to match valid token names
+_is_identifier = re.compile(r'^[a-zA-Z0-9_]+$')
+
+# Exception thrown when invalid token encountered and no default error
+# handler is defined.
+class LexError(Exception):
+    def __init__(self, message, s):
+        self.args = (message,)
+        self.text = s
+
+
+# Token class.  This class is used to represent the tokens produced.
+class LexToken(object):
+    def __str__(self):
+        return 'LexToken(%s,%r,%d,%d)' % (self.type, self.value, self.lineno, self.lexpos)
+
+    def __repr__(self):
+        return str(self)
+
+
+# This object is a stand-in for a logging object created by the
+# logging module.
+
+class PlyLogger(object):
+    def __init__(self, f):
+        self.f = f
+
+    def critical(self, msg, *args, **kwargs):
+        self.f.write((msg % args) + '\n')
+
+    def warning(self, msg, *args, **kwargs):
+        self.f.write('WARNING: ' + (msg % args) + '\n')
+
+    def error(self, msg, *args, **kwargs):
+        self.f.write('ERROR: ' + (msg % args) + '\n')
+
+    info = critical
+    debug = critical
+
+
+# Null logger is used when no output is generated. Does nothing.
+class NullLogger(object):
+    def __getattribute__(self, name):
+        return self
+
+    def __call__(self, *args, **kwargs):
+        return self
+
+
+# -----------------------------------------------------------------------------
+#                        === Lexing Engine ===
+#
+# The following Lexer class implements the lexer runtime.   There are only
+# a few public methods and attributes:
+#
+#    input()          -  Store a new string in the lexer
+#    token()          -  Get the next token
+#    clone()          -  Clone the lexer
+#
+#    lineno           -  Current line number
+#    lexpos           -  Current position in the input string
+# -----------------------------------------------------------------------------
+
+class Lexer:
+    def __init__(self):
+        self.lexre = None             # Master regular expression. This is a list of
+                                      # tuples (re, findex) where re is a compiled
+                                      # regular expression and findex is a list
+                                      # mapping regex group numbers to rules
+        self.lexretext = None         # Current regular expression strings
+        self.lexstatere = {}          # Dictionary mapping lexer states to master regexs
+        self.lexstateretext = {}      # Dictionary mapping lexer states to regex strings
+        self.lexstaterenames = {}     # Dictionary mapping lexer states to symbol names
+        self.lexstate = 'INITIAL'     # Current lexer state
+        self.lexstatestack = []       # Stack of lexer states
+        self.lexstateinfo = None      # State information
+        self.lexstateignore = {}      # Dictionary of ignored characters for each state
+        self.lexstateerrorf = {}      # Dictionary of error functions for each state
+        self.lexstateeoff = {}        # Dictionary of eof functions for each state
+        self.lexreflags = 0           # Optional re compile flags
+        self.lexdata = None           # Actual input data (as a string)
+        self.lexpos = 0               # Current position in input text
+        self.lexlen = 0               # Length of the input text
+        self.lexerrorf = None         # Error rule (if any)
+        self.lexeoff = None           # EOF rule (if any)
+        self.lextokens = None         # List of valid tokens
+        self.lexignore = ''           # Ignored characters
+        self.lexliterals = ''         # Literal characters that can be passed through
+        self.lexmodule = None         # Module
+        self.lineno = 1               # Current line number
+        self.lexoptimize = False      # Optimized mode
+
+    def clone(self, object=None):
+        c = copy.copy(self)
+
+        # If the object parameter has been supplied, it means we are attaching the
+        # lexer to a new object.  In this case, we have to rebind all methods in
+        # the lexstatere and lexstateerrorf tables.
+
+        if object:
+            newtab = {}
+            for key, ritem in self.lexstatere.items():
+                newre = []
+                for cre, findex in ritem:
+                    newfindex = []
+                    for f in findex:
+                        if not f or not f[0]:
+                            newfindex.append(f)
+                            continue
+                        newfindex.append((getattr(object, f[0].__name__), f[1]))
+                newre.append((cre, newfindex))
+                newtab[key] = newre
+            c.lexstatere = newtab
+            c.lexstateerrorf = {}
+            for key, ef in self.lexstateerrorf.items():
+                c.lexstateerrorf[key] = getattr(object, ef.__name__)
+            c.lexmodule = object
+        return c
+
+    # ------------------------------------------------------------
+    # writetab() - Write lexer information to a table file
+    # ------------------------------------------------------------
+    def writetab(self, lextab, outputdir=''):
+        if isinstance(lextab, types.ModuleType):
+            raise IOError("Won't overwrite existing lextab module")
+        basetabmodule = lextab.split('.')[-1]
+        filename = os.path.join(outputdir, basetabmodule) + '.py'
+        with open(filename, 'w') as tf:
+            tf.write('# %s.py. This file automatically created by PLY (version %s). Don\'t edit!\n' % (basetabmodule, __version__))
+            tf.write('_tabversion   = %s\n' % repr(__tabversion__))
+            tf.write('_lextokens    = set(%s)\n' % repr(tuple(sorted(self.lextokens))))
+            tf.write('_lexreflags   = %s\n' % repr(int(self.lexreflags)))
+            tf.write('_lexliterals  = %s\n' % repr(self.lexliterals))
+            tf.write('_lexstateinfo = %s\n' % repr(self.lexstateinfo))
+
+            # Rewrite the lexstatere table, replacing function objects with function names
+            tabre = {}
+            for statename, lre in self.lexstatere.items():
+                titem = []
+                for (pat, func), retext, renames in zip(lre, self.lexstateretext[statename], self.lexstaterenames[statename]):
+                    titem.append((retext, _funcs_to_names(func, renames)))
+                tabre[statename] = titem
+
+            tf.write('_lexstatere   = %s\n' % repr(tabre))
+            tf.write('_lexstateignore = %s\n' % repr(self.lexstateignore))
+
+            taberr = {}
+            for statename, ef in self.lexstateerrorf.items():
+                taberr[statename] = ef.__name__ if ef else None
+            tf.write('_lexstateerrorf = %s\n' % repr(taberr))
+
+            tabeof = {}
+            for statename, ef in self.lexstateeoff.items():
+                tabeof[statename] = ef.__name__ if ef else None
+            tf.write('_lexstateeoff = %s\n' % repr(tabeof))
+
+    # ------------------------------------------------------------
+    # readtab() - Read lexer information from a tab file
+    # ------------------------------------------------------------
+    def readtab(self, tabfile, fdict):
+        if isinstance(tabfile, types.ModuleType):
+            lextab = tabfile
+        else:
+            exec('import %s' % tabfile)
+            lextab = sys.modules[tabfile]
+
+        if getattr(lextab, '_tabversion', '0.0') != __tabversion__:
+            raise ImportError('Inconsistent PLY version')
+
+        self.lextokens      = lextab._lextokens
+        self.lexreflags     = lextab._lexreflags
+        self.lexliterals    = lextab._lexliterals
+        self.lextokens_all  = self.lextokens | set(self.lexliterals)
+        self.lexstateinfo   = lextab._lexstateinfo
+        self.lexstateignore = lextab._lexstateignore
+        self.lexstatere     = {}
+        self.lexstateretext = {}
+        for statename, lre in lextab._lexstatere.items():
+            titem = []
+            txtitem = []
+            for pat, func_name in lre:
+                titem.append((re.compile(pat, lextab._lexreflags), _names_to_funcs(func_name, fdict)))
+
+            self.lexstatere[statename] = titem
+            self.lexstateretext[statename] = txtitem
+
+        self.lexstateerrorf = {}
+        for statename, ef in lextab._lexstateerrorf.items():
+            self.lexstateerrorf[statename] = fdict[ef]
+
+        self.lexstateeoff = {}
+        for statename, ef in lextab._lexstateeoff.items():
+            self.lexstateeoff[statename] = fdict[ef]
+
+        self.begin('INITIAL')
+
+    # ------------------------------------------------------------
+    # input() - Push a new string into the lexer
+    # ------------------------------------------------------------
+    def input(self, s):
+        # Pull off the first character to see if s looks like a string
+        c = s[:1]
+        if not isinstance(c, StringTypes):
+            raise ValueError('Expected a string')
+        self.lexdata = s
+        self.lexpos = 0
+        self.lexlen = len(s)
+
+    # ------------------------------------------------------------
+    # begin() - Changes the lexing state
+    # ------------------------------------------------------------
+    def begin(self, state):
+        if state not in self.lexstatere:
+            raise ValueError('Undefined state')
+        self.lexre = self.lexstatere[state]
+        self.lexretext = self.lexstateretext[state]
+        self.lexignore = self.lexstateignore.get(state, '')
+        self.lexerrorf = self.lexstateerrorf.get(state, None)
+        self.lexeoff = self.lexstateeoff.get(state, None)
+        self.lexstate = state
+
+    # ------------------------------------------------------------
+    # push_state() - Changes the lexing state and saves old on stack
+    # ------------------------------------------------------------
+    def push_state(self, state):
+        self.lexstatestack.append(self.lexstate)
+        self.begin(state)
+
+    # ------------------------------------------------------------
+    # pop_state() - Restores the previous state
+    # ------------------------------------------------------------
+    def pop_state(self):
+        self.begin(self.lexstatestack.pop())
+
+    # ------------------------------------------------------------
+    # current_state() - Returns the current lexing state
+    # ------------------------------------------------------------
+    def current_state(self):
+        return self.lexstate
+
+    # ------------------------------------------------------------
+    # skip() - Skip ahead n characters
+    # ------------------------------------------------------------
+    def skip(self, n):
+        self.lexpos += n
+
+    # ------------------------------------------------------------
+    # opttoken() - Return the next token from the Lexer
+    #
+    # Note: This function has been carefully implemented to be as fast
+    # as possible.  Don't make changes unless you really know what
+    # you are doing
+    # ------------------------------------------------------------
+    def token(self):
+        # Make local copies of frequently referenced attributes
+        lexpos    = self.lexpos
+        lexlen    = self.lexlen
+        lexignore = self.lexignore
+        lexdata   = self.lexdata
+
+        while lexpos < lexlen:
+            # This code provides some short-circuit code for whitespace, tabs, and other ignored characters
+            if lexdata[lexpos] in lexignore:
+                lexpos += 1
+                continue
+
+            # Look for a regular expression match
+            for lexre, lexindexfunc in self.lexre:
+                m = lexre.match(lexdata, lexpos)
+                if not m:
+                    continue
+
+                # Create a token for return
+                tok = LexToken()
+                tok.value = m.group()
+                tok.lineno = self.lineno
+                tok.lexpos = lexpos
+
+                i = m.lastindex
+                func, tok.type = lexindexfunc[i]
+
+                if not func:
+                    # If no token type was set, it's an ignored token
+                    if tok.type:
+                        self.lexpos = m.end()
+                        return tok
+                    else:
+                        lexpos = m.end()
+                        break
+
+                lexpos = m.end()
+
+                # If token is processed by a function, call it
+
+                tok.lexer = self      # Set additional attributes useful in token rules
+                self.lexmatch = m
+                self.lexpos = lexpos
+
+                newtok = func(tok)
+
+                # Every function must return a token, if nothing, we just move to next token
+                if not newtok:
+                    lexpos    = self.lexpos         # This is here in case user has updated lexpos.
+                    lexignore = self.lexignore      # This is here in case there was a state change
+                    break
+
+                # Verify type of the token.  If not in the token map, raise an error
+                if not self.lexoptimize:
+                    if newtok.type not in self.lextokens_all:
+                        raise LexError("%s:%d: Rule '%s' returned an unknown token type '%s'" % (
+                            func.__code__.co_filename, func.__code__.co_firstlineno,
+                            func.__name__, newtok.type), lexdata[lexpos:])
+
+                return newtok
+            else:
+                # No match, see if in literals
+                if lexdata[lexpos] in self.lexliterals:
+                    tok = LexToken()
+                    tok.value = lexdata[lexpos]
+                    tok.lineno = self.lineno
+                    tok.type = tok.value
+                    tok.lexpos = lexpos
+                    self.lexpos = lexpos + 1
+                    return tok
+
+                # No match. Call t_error() if defined.
+                if self.lexerrorf:
+                    tok = LexToken()
+                    tok.value = self.lexdata[lexpos:]
+                    tok.lineno = self.lineno
+                    tok.type = 'error'
+                    tok.lexer = self
+                    tok.lexpos = lexpos
+                    self.lexpos = lexpos
+                    newtok = self.lexerrorf(tok)
+                    if lexpos == self.lexpos:
+                        # Error method didn't change text position at all. This is an error.
+                        raise LexError("Scanning error. Illegal character '%s'" % (lexdata[lexpos]), lexdata[lexpos:])
+                    lexpos = self.lexpos
+                    if not newtok:
+                        continue
+                    return newtok
+
+                self.lexpos = lexpos
+                raise LexError("Illegal character '%s' at index %d" % (lexdata[lexpos], lexpos), lexdata[lexpos:])
+
+        if self.lexeoff:
+            tok = LexToken()
+            tok.type = 'eof'
+            tok.value = ''
+            tok.lineno = self.lineno
+            tok.lexpos = lexpos
+            tok.lexer = self
+            self.lexpos = lexpos
+            newtok = self.lexeoff(tok)
+            return newtok
+
+        self.lexpos = lexpos + 1
+        if self.lexdata is None:
+            raise RuntimeError('No input string given with input()')
+        return None
+
+    # Iterator interface
+    def __iter__(self):
+        return self
+
+    def next(self):
+        t = self.token()
+        if t is None:
+            raise StopIteration
+        return t
+
+    __next__ = next
+
+# -----------------------------------------------------------------------------
+#                           ==== Lex Builder ===
+#
+# The functions and classes below are used to collect lexing information
+# and build a Lexer object from it.
+# -----------------------------------------------------------------------------
+
+# -----------------------------------------------------------------------------
+# _get_regex(func)
+#
+# Returns the regular expression assigned to a function either as a doc string
+# or as a .regex attribute attached by the @TOKEN decorator.
+# -----------------------------------------------------------------------------
+def _get_regex(func):
+    return getattr(func, 'regex', func.__doc__)
+
+# -----------------------------------------------------------------------------
+# get_caller_module_dict()
+#
+# This function returns a dictionary containing all of the symbols defined within
+# a caller further down the call stack.  This is used to get the environment
+# associated with the yacc() call if none was provided.
+# -----------------------------------------------------------------------------
+def get_caller_module_dict(levels):
+    f = sys._getframe(levels)
+    ldict = f.f_globals.copy()
+    if f.f_globals != f.f_locals:
+        ldict.update(f.f_locals)
+    return ldict
+
+# -----------------------------------------------------------------------------
+# _funcs_to_names()
+#
+# Given a list of regular expression functions, this converts it to a list
+# suitable for output to a table file
+# -----------------------------------------------------------------------------
+def _funcs_to_names(funclist, namelist):
+    result = []
+    for f, name in zip(funclist, namelist):
+        if f and f[0]:
+            result.append((name, f[1]))
+        else:
+            result.append(f)
+    return result
+
+# -----------------------------------------------------------------------------
+# _names_to_funcs()
+#
+# Given a list of regular expression function names, this converts it back to
+# functions.
+# -----------------------------------------------------------------------------
+def _names_to_funcs(namelist, fdict):
+    result = []
+    for n in namelist:
+        if n and n[0]:
+            result.append((fdict[n[0]], n[1]))
+        else:
+            result.append(n)
+    return result
+
+# -----------------------------------------------------------------------------
+# _form_master_re()
+#
+# This function takes a list of all of the regex components and attempts to
+# form the master regular expression.  Given limitations in the Python re
+# module, it may be necessary to break the master regex into separate expressions.
+# -----------------------------------------------------------------------------
+def _form_master_re(relist, reflags, ldict, toknames):
+    if not relist:
+        return []
+    regex = '|'.join(relist)
+    try:
+        lexre = re.compile(regex, reflags)
+
+        # Build the index to function map for the matching engine
+        lexindexfunc = [None] * (max(lexre.groupindex.values()) + 1)
+        lexindexnames = lexindexfunc[:]
+
+        for f, i in lexre.groupindex.items():
+            handle = ldict.get(f, None)
+            if type(handle) in (types.FunctionType, types.MethodType):
+                lexindexfunc[i] = (handle, toknames[f])
+                lexindexnames[i] = f
+            elif handle is not None:
+                lexindexnames[i] = f
+                if f.find('ignore_') > 0:
+                    lexindexfunc[i] = (None, None)
+                else:
+                    lexindexfunc[i] = (None, toknames[f])
+
+        return [(lexre, lexindexfunc)], [regex], [lexindexnames]
+    except Exception:
+        m = int(len(relist)/2)
+        if m == 0:
+            m = 1
+        llist, lre, lnames = _form_master_re(relist[:m], reflags, ldict, toknames)
+        rlist, rre, rnames = _form_master_re(relist[m:], reflags, ldict, toknames)
+        return (llist+rlist), (lre+rre), (lnames+rnames)
+
+# -----------------------------------------------------------------------------
+# def _statetoken(s,names)
+#
+# Given a declaration name s of the form "t_" and a dictionary whose keys are
+# state names, this function returns a tuple (states,tokenname) where states
+# is a tuple of state names and tokenname is the name of the token.  For example,
+# calling this with s = "t_foo_bar_SPAM" might return (('foo','bar'),'SPAM')
+# -----------------------------------------------------------------------------
+def _statetoken(s, names):
+    parts = s.split('_')
+    for i, part in enumerate(parts[1:], 1):
+        if part not in names and part != 'ANY':
+            break
+
+    if i > 1:
+        states = tuple(parts[1:i])
+    else:
+        states = ('INITIAL',)
+
+    if 'ANY' in states:
+        states = tuple(names)
+
+    tokenname = '_'.join(parts[i:])
+    return (states, tokenname)
+
+
+# -----------------------------------------------------------------------------
+# LexerReflect()
+#
+# This class represents information needed to build a lexer as extracted from a
+# user's input file.
+# -----------------------------------------------------------------------------
+class LexerReflect(object):
+    def __init__(self, ldict, log=None, reflags=0):
+        self.ldict      = ldict
+        self.error_func = None
+        self.tokens     = []
+        self.reflags    = reflags
+        self.stateinfo  = {'INITIAL': 'inclusive'}
+        self.modules    = set()
+        self.error      = False
+        self.log        = PlyLogger(sys.stderr) if log is None else log
+
+    # Get all of the basic information
+    def get_all(self):
+        self.get_tokens()
+        self.get_literals()
+        self.get_states()
+        self.get_rules()
+
+    # Validate all of the information
+    def validate_all(self):
+        self.validate_tokens()
+        self.validate_literals()
+        self.validate_rules()
+        return self.error
+
+    # Get the tokens map
+    def get_tokens(self):
+        tokens = self.ldict.get('tokens', None)
+        if not tokens:
+            self.log.error('No token list is defined')
+            self.error = True
+            return
+
+        if not isinstance(tokens, (list, tuple)):
+            self.log.error('tokens must be a list or tuple')
+            self.error = True
+            return
+
+        if not tokens:
+            self.log.error('tokens is empty')
+            self.error = True
+            return
+
+        self.tokens = tokens
+
+    # Validate the tokens
+    def validate_tokens(self):
+        terminals = {}
+        for n in self.tokens:
+            if not _is_identifier.match(n):
+                self.log.error("Bad token name '%s'", n)
+                self.error = True
+            if n in terminals:
+                self.log.warning("Token '%s' multiply defined", n)
+            terminals[n] = 1
+
+    # Get the literals specifier
+    def get_literals(self):
+        self.literals = self.ldict.get('literals', '')
+        if not self.literals:
+            self.literals = ''
+
+    # Validate literals
+    def validate_literals(self):
+        try:
+            for c in self.literals:
+                if not isinstance(c, StringTypes) or len(c) > 1:
+                    self.log.error('Invalid literal %s. Must be a single character', repr(c))
+                    self.error = True
+
+        except TypeError:
+            self.log.error('Invalid literals specification. literals must be a sequence of characters')
+            self.error = True
+
+    def get_states(self):
+        self.states = self.ldict.get('states', None)
+        # Build statemap
+        if self.states:
+            if not isinstance(self.states, (tuple, list)):
+                self.log.error('states must be defined as a tuple or list')
+                self.error = True
+            else:
+                for s in self.states:
+                    if not isinstance(s, tuple) or len(s) != 2:
+                        self.log.error("Invalid state specifier %s. Must be a tuple (statename,'exclusive|inclusive')", repr(s))
+                        self.error = True
+                        continue
+                    name, statetype = s
+                    if not isinstance(name, StringTypes):
+                        self.log.error('State name %s must be a string', repr(name))
+                        self.error = True
+                        continue
+                    if not (statetype == 'inclusive' or statetype == 'exclusive'):
+                        self.log.error("State type for state %s must be 'inclusive' or 'exclusive'", name)
+                        self.error = True
+                        continue
+                    if name in self.stateinfo:
+                        self.log.error("State '%s' already defined", name)
+                        self.error = True
+                        continue
+                    self.stateinfo[name] = statetype
+
+    # Get all of the symbols with a t_ prefix and sort them into various
+    # categories (functions, strings, error functions, and ignore characters)
+
+    def get_rules(self):
+        tsymbols = [f for f in self.ldict if f[:2] == 't_']
+
+        # Now build up a list of functions and a list of strings
+        self.toknames = {}        # Mapping of symbols to token names
+        self.funcsym  = {}        # Symbols defined as functions
+        self.strsym   = {}        # Symbols defined as strings
+        self.ignore   = {}        # Ignore strings by state
+        self.errorf   = {}        # Error functions by state
+        self.eoff     = {}        # EOF functions by state
+
+        for s in self.stateinfo:
+            self.funcsym[s] = []
+            self.strsym[s] = []
+
+        if len(tsymbols) == 0:
+            self.log.error('No rules of the form t_rulename are defined')
+            self.error = True
+            return
+
+        for f in tsymbols:
+            t = self.ldict[f]
+            states, tokname = _statetoken(f, self.stateinfo)
+            self.toknames[f] = tokname
+
+            if hasattr(t, '__call__'):
+                if tokname == 'error':
+                    for s in states:
+                        self.errorf[s] = t
+                elif tokname == 'eof':
+                    for s in states:
+                        self.eoff[s] = t
+                elif tokname == 'ignore':
+                    line = t.__code__.co_firstlineno
+                    file = t.__code__.co_filename
+                    self.log.error("%s:%d: Rule '%s' must be defined as a string", file, line, t.__name__)
+                    self.error = True
+                else:
+                    for s in states:
+                        self.funcsym[s].append((f, t))
+            elif isinstance(t, StringTypes):
+                if tokname == 'ignore':
+                    for s in states:
+                        self.ignore[s] = t
+                    if '\\' in t:
+                        self.log.warning("%s contains a literal backslash '\\'", f)
+
+                elif tokname == 'error':
+                    self.log.error("Rule '%s' must be defined as a function", f)
+                    self.error = True
+                else:
+                    for s in states:
+                        self.strsym[s].append((f, t))
+            else:
+                self.log.error('%s not defined as a function or string', f)
+                self.error = True
+
+        # Sort the functions by line number
+        for f in self.funcsym.values():
+            f.sort(key=lambda x: x[1].__code__.co_firstlineno)
+
+        # Sort the strings by regular expression length
+        for s in self.strsym.values():
+            s.sort(key=lambda x: len(x[1]), reverse=True)
+
+    # Validate all of the t_rules collected
+    def validate_rules(self):
+        for state in self.stateinfo:
+            # Validate all rules defined by functions
+
+            for fname, f in self.funcsym[state]:
+                line = f.__code__.co_firstlineno
+                file = f.__code__.co_filename
+                module = inspect.getmodule(f)
+                self.modules.add(module)
+
+                tokname = self.toknames[fname]
+                if isinstance(f, types.MethodType):
+                    reqargs = 2
+                else:
+                    reqargs = 1
+                nargs = f.__code__.co_argcount
+                if nargs > reqargs:
+                    self.log.error("%s:%d: Rule '%s' has too many arguments", file, line, f.__name__)
+                    self.error = True
+                    continue
+
+                if nargs < reqargs:
+                    self.log.error("%s:%d: Rule '%s' requires an argument", file, line, f.__name__)
+                    self.error = True
+                    continue
+
+                if not _get_regex(f):
+                    self.log.error("%s:%d: No regular expression defined for rule '%s'", file, line, f.__name__)
+                    self.error = True
+                    continue
+
+                try:
+                    c = re.compile('(?P<%s>%s)' % (fname, _get_regex(f)), self.reflags)
+                    if c.match(''):
+                        self.log.error("%s:%d: Regular expression for rule '%s' matches empty string", file, line, f.__name__)
+                        self.error = True
+                except re.error as e:
+                    self.log.error("%s:%d: Invalid regular expression for rule '%s'. %s", file, line, f.__name__, e)
+                    if '#' in _get_regex(f):
+                        self.log.error("%s:%d. Make sure '#' in rule '%s' is escaped with '\\#'", file, line, f.__name__)
+                    self.error = True
+
+            # Validate all rules defined by strings
+            for name, r in self.strsym[state]:
+                tokname = self.toknames[name]
+                if tokname == 'error':
+                    self.log.error("Rule '%s' must be defined as a function", name)
+                    self.error = True
+                    continue
+
+                if tokname not in self.tokens and tokname.find('ignore_') < 0:
+                    self.log.error("Rule '%s' defined for an unspecified token %s", name, tokname)
+                    self.error = True
+                    continue
+
+                try:
+                    c = re.compile('(?P<%s>%s)' % (name, r), self.reflags)
+                    if (c.match('')):
+                        self.log.error("Regular expression for rule '%s' matches empty string", name)
+                        self.error = True
+                except re.error as e:
+                    self.log.error("Invalid regular expression for rule '%s'. %s", name, e)
+                    if '#' in r:
+                        self.log.error("Make sure '#' in rule '%s' is escaped with '\\#'", name)
+                    self.error = True
+
+            if not self.funcsym[state] and not self.strsym[state]:
+                self.log.error("No rules defined for state '%s'", state)
+                self.error = True
+
+            # Validate the error function
+            efunc = self.errorf.get(state, None)
+            if efunc:
+                f = efunc
+                line = f.__code__.co_firstlineno
+                file = f.__code__.co_filename
+                module = inspect.getmodule(f)
+                self.modules.add(module)
+
+                if isinstance(f, types.MethodType):
+                    reqargs = 2
+                else:
+                    reqargs = 1
+                nargs = f.__code__.co_argcount
+                if nargs > reqargs:
+                    self.log.error("%s:%d: Rule '%s' has too many arguments", file, line, f.__name__)
+                    self.error = True
+
+                if nargs < reqargs:
+                    self.log.error("%s:%d: Rule '%s' requires an argument", file, line, f.__name__)
+                    self.error = True
+
+        for module in self.modules:
+            self.validate_module(module)
+
+    # -----------------------------------------------------------------------------
+    # validate_module()
+    #
+    # This checks to see if there are duplicated t_rulename() functions or strings
+    # in the parser input file.  This is done using a simple regular expression
+    # match on each line in the source code of the given module.
+    # -----------------------------------------------------------------------------
+
+    def validate_module(self, module):
+        try:
+            lines, linen = inspect.getsourcelines(module)
+        except IOError:
+            return
+
+        fre = re.compile(r'\s*def\s+(t_[a-zA-Z_0-9]*)\(')
+        sre = re.compile(r'\s*(t_[a-zA-Z_0-9]*)\s*=')
+
+        counthash = {}
+        linen += 1
+        for line in lines:
+            m = fre.match(line)
+            if not m:
+                m = sre.match(line)
+            if m:
+                name = m.group(1)
+                prev = counthash.get(name)
+                if not prev:
+                    counthash[name] = linen
+                else:
+                    filename = inspect.getsourcefile(module)
+                    self.log.error('%s:%d: Rule %s redefined. Previously defined on line %d', filename, linen, name, prev)
+                    self.error = True
+            linen += 1
+
+# -----------------------------------------------------------------------------
+# lex(module)
+#
+# Build all of the regular expression rules from definitions in the supplied module
+# -----------------------------------------------------------------------------
+def lex(module=None, object=None, debug=False, optimize=False, lextab='lextab',
+        reflags=int(re.VERBOSE), nowarn=False, outputdir=None, debuglog=None, errorlog=None):
+
+    if lextab is None:
+        lextab = 'lextab'
+
+    global lexer
+
+    ldict = None
+    stateinfo  = {'INITIAL': 'inclusive'}
+    lexobj = Lexer()
+    lexobj.lexoptimize = optimize
+    global token, input
+
+    if errorlog is None:
+        errorlog = PlyLogger(sys.stderr)
+
+    if debug:
+        if debuglog is None:
+            debuglog = PlyLogger(sys.stderr)
+
+    # Get the module dictionary used for the lexer
+    if object:
+        module = object
+
+    # Get the module dictionary used for the parser
+    if module:
+        _items = [(k, getattr(module, k)) for k in dir(module)]
+        ldict = dict(_items)
+        # If no __file__ attribute is available, try to obtain it from the __module__ instead
+        if '__file__' not in ldict:
+            ldict['__file__'] = sys.modules[ldict['__module__']].__file__
+    else:
+        ldict = get_caller_module_dict(2)
+
+    # Determine if the module is package of a package or not.
+    # If so, fix the tabmodule setting so that tables load correctly
+    pkg = ldict.get('__package__')
+    if pkg and isinstance(lextab, str):
+        if '.' not in lextab:
+            lextab = pkg + '.' + lextab
+
+    # Collect parser information from the dictionary
+    linfo = LexerReflect(ldict, log=errorlog, reflags=reflags)
+    linfo.get_all()
+    if not optimize:
+        if linfo.validate_all():
+            raise SyntaxError("Can't build lexer")
+
+    if optimize and lextab:
+        try:
+            lexobj.readtab(lextab, ldict)
+            token = lexobj.token
+            input = lexobj.input
+            lexer = lexobj
+            return lexobj
+
+        except ImportError:
+            pass
+
+    # Dump some basic debugging information
+    if debug:
+        debuglog.info('lex: tokens   = %r', linfo.tokens)
+        debuglog.info('lex: literals = %r', linfo.literals)
+        debuglog.info('lex: states   = %r', linfo.stateinfo)
+
+    # Build a dictionary of valid token names
+    lexobj.lextokens = set()
+    for n in linfo.tokens:
+        lexobj.lextokens.add(n)
+
+    # Get literals specification
+    if isinstance(linfo.literals, (list, tuple)):
+        lexobj.lexliterals = type(linfo.literals[0])().join(linfo.literals)
+    else:
+        lexobj.lexliterals = linfo.literals
+
+    lexobj.lextokens_all = lexobj.lextokens | set(lexobj.lexliterals)
+
+    # Get the stateinfo dictionary
+    stateinfo = linfo.stateinfo
+
+    regexs = {}
+    # Build the master regular expressions
+    for state in stateinfo:
+        regex_list = []
+
+        # Add rules defined by functions first
+        for fname, f in linfo.funcsym[state]:
+            regex_list.append('(?P<%s>%s)' % (fname, _get_regex(f)))
+            if debug:
+                debuglog.info("lex: Adding rule %s -> '%s' (state '%s')", fname, _get_regex(f), state)
+
+        # Now add all of the simple rules
+        for name, r in linfo.strsym[state]:
+            regex_list.append('(?P<%s>%s)' % (name, r))
+            if debug:
+                debuglog.info("lex: Adding rule %s -> '%s' (state '%s')", name, r, state)
+
+        regexs[state] = regex_list
+
+    # Build the master regular expressions
+
+    if debug:
+        debuglog.info('lex: ==== MASTER REGEXS FOLLOW ====')
+
+    for state in regexs:
+        lexre, re_text, re_names = _form_master_re(regexs[state], reflags, ldict, linfo.toknames)
+        lexobj.lexstatere[state] = lexre
+        lexobj.lexstateretext[state] = re_text
+        lexobj.lexstaterenames[state] = re_names
+        if debug:
+            for i, text in enumerate(re_text):
+                debuglog.info("lex: state '%s' : regex[%d] = '%s'", state, i, text)
+
+    # For inclusive states, we need to add the regular expressions from the INITIAL state
+    for state, stype in stateinfo.items():
+        if state != 'INITIAL' and stype == 'inclusive':
+            lexobj.lexstatere[state].extend(lexobj.lexstatere['INITIAL'])
+            lexobj.lexstateretext[state].extend(lexobj.lexstateretext['INITIAL'])
+            lexobj.lexstaterenames[state].extend(lexobj.lexstaterenames['INITIAL'])
+
+    lexobj.lexstateinfo = stateinfo
+    lexobj.lexre = lexobj.lexstatere['INITIAL']
+    lexobj.lexretext = lexobj.lexstateretext['INITIAL']
+    lexobj.lexreflags = reflags
+
+    # Set up ignore variables
+    lexobj.lexstateignore = linfo.ignore
+    lexobj.lexignore = lexobj.lexstateignore.get('INITIAL', '')
+
+    # Set up error functions
+    lexobj.lexstateerrorf = linfo.errorf
+    lexobj.lexerrorf = linfo.errorf.get('INITIAL', None)
+    if not lexobj.lexerrorf:
+        errorlog.warning('No t_error rule is defined')
+
+    # Set up eof functions
+    lexobj.lexstateeoff = linfo.eoff
+    lexobj.lexeoff = linfo.eoff.get('INITIAL', None)
+
+    # Check state information for ignore and error rules
+    for s, stype in stateinfo.items():
+        if stype == 'exclusive':
+            if s not in linfo.errorf:
+                errorlog.warning("No error rule is defined for exclusive state '%s'", s)
+            if s not in linfo.ignore and lexobj.lexignore:
+                errorlog.warning("No ignore rule is defined for exclusive state '%s'", s)
+        elif stype == 'inclusive':
+            if s not in linfo.errorf:
+                linfo.errorf[s] = linfo.errorf.get('INITIAL', None)
+            if s not in linfo.ignore:
+                linfo.ignore[s] = linfo.ignore.get('INITIAL', '')
+
+    # Create global versions of the token() and input() functions
+    token = lexobj.token
+    input = lexobj.input
+    lexer = lexobj
+
+    # If in optimize mode, we write the lextab
+    if lextab and optimize:
+        if outputdir is None:
+            # If no output directory is set, the location of the output files
+            # is determined according to the following rules:
+            #     - If lextab specifies a package, files go into that package directory
+            #     - Otherwise, files go in the same directory as the specifying module
+            if isinstance(lextab, types.ModuleType):
+                srcfile = lextab.__file__
+            else:
+                if '.' not in lextab:
+                    srcfile = ldict['__file__']
+                else:
+                    parts = lextab.split('.')
+                    pkgname = '.'.join(parts[:-1])
+                    exec('import %s' % pkgname)
+                    srcfile = getattr(sys.modules[pkgname], '__file__', '')
+            outputdir = os.path.dirname(srcfile)
+        try:
+            lexobj.writetab(lextab, outputdir)
+            if lextab in sys.modules:
+                del sys.modules[lextab]
+        except IOError as e:
+            errorlog.warning("Couldn't write lextab module %r. %s" % (lextab, e))
+
+    return lexobj
+
+# -----------------------------------------------------------------------------
+# runmain()
+#
+# This runs the lexer as a main program
+# -----------------------------------------------------------------------------
+
+def runmain(lexer=None, data=None):
+    if not data:
+        try:
+            filename = sys.argv[1]
+            f = open(filename)
+            data = f.read()
+            f.close()
+        except IndexError:
+            sys.stdout.write('Reading from standard input (type EOF to end):\n')
+            data = sys.stdin.read()
+
+    if lexer:
+        _input = lexer.input
+    else:
+        _input = input
+    _input(data)
+    if lexer:
+        _token = lexer.token
+    else:
+        _token = token
+
+    while True:
+        tok = _token()
+        if not tok:
+            break
+        sys.stdout.write('(%s,%r,%d,%d)\n' % (tok.type, tok.value, tok.lineno, tok.lexpos))
+
+# -----------------------------------------------------------------------------
+# @TOKEN(regex)
+#
+# This decorator function can be used to set the regex expression on a function
+# when its docstring might need to be set in an alternative way
+# -----------------------------------------------------------------------------
+
+def TOKEN(r):
+    def set_regex(f):
+        if hasattr(r, '__call__'):
+            f.regex = _get_regex(r)
+        else:
+            f.regex = r
+        return f
+    return set_regex
+
+# Alternative spelling of the TOKEN decorator
+Token = TOKEN
diff --git a/venv/lib/python3.9/site-packages/ply/yacc.py b/venv/lib/python3.9/site-packages/ply/yacc.py
new file mode 100644
index 0000000..88188a1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/yacc.py
@@ -0,0 +1,3502 @@
+# -----------------------------------------------------------------------------
+# ply: yacc.py
+#
+# Copyright (C) 2001-2018
+# David M. Beazley (Dabeaz LLC)
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+#   this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+# * Neither the name of the David Beazley or Dabeaz LLC may be used to
+#   endorse or promote products derived from this software without
+#  specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# -----------------------------------------------------------------------------
+#
+# This implements an LR parser that is constructed from grammar rules defined
+# as Python functions. The grammar is specified by supplying the BNF inside
+# Python documentation strings.  The inspiration for this technique was borrowed
+# from John Aycock's Spark parsing system.  PLY might be viewed as cross between
+# Spark and the GNU bison utility.
+#
+# The current implementation is only somewhat object-oriented. The
+# LR parser itself is defined in terms of an object (which allows multiple
+# parsers to co-exist).  However, most of the variables used during table
+# construction are defined in terms of global variables.  Users shouldn't
+# notice unless they are trying to define multiple parsers at the same
+# time using threads (in which case they should have their head examined).
+#
+# This implementation supports both SLR and LALR(1) parsing.  LALR(1)
+# support was originally implemented by Elias Ioup (ezioup@alumni.uchicago.edu),
+# using the algorithm found in Aho, Sethi, and Ullman "Compilers: Principles,
+# Techniques, and Tools" (The Dragon Book).  LALR(1) has since been replaced
+# by the more efficient DeRemer and Pennello algorithm.
+#
+# :::::::: WARNING :::::::
+#
+# Construction of LR parsing tables is fairly complicated and expensive.
+# To make this module run fast, a *LOT* of work has been put into
+# optimization---often at the expensive of readability and what might
+# consider to be good Python "coding style."   Modify the code at your
+# own risk!
+# ----------------------------------------------------------------------------
+
+import re
+import types
+import sys
+import os.path
+import inspect
+import warnings
+
+__version__    = '3.11'
+__tabversion__ = '3.10'
+
+#-----------------------------------------------------------------------------
+#                     === User configurable parameters ===
+#
+# Change these to modify the default behavior of yacc (if you wish)
+#-----------------------------------------------------------------------------
+
+yaccdebug   = True             # Debugging mode.  If set, yacc generates a
+                               # a 'parser.out' file in the current directory
+
+debug_file  = 'parser.out'     # Default name of the debugging file
+tab_module  = 'parsetab'       # Default name of the table module
+default_lr  = 'LALR'           # Default LR table generation method
+
+error_count = 3                # Number of symbols that must be shifted to leave recovery mode
+
+yaccdevel   = False            # Set to True if developing yacc.  This turns off optimized
+                               # implementations of certain functions.
+
+resultlimit = 40               # Size limit of results when running in debug mode.
+
+pickle_protocol = 0            # Protocol to use when writing pickle files
+
+# String type-checking compatibility
+if sys.version_info[0] < 3:
+    string_types = basestring
+else:
+    string_types = str
+
+MAXINT = sys.maxsize
+
+# This object is a stand-in for a logging object created by the
+# logging module.   PLY will use this by default to create things
+# such as the parser.out file.  If a user wants more detailed
+# information, they can create their own logging object and pass
+# it into PLY.
+
+class PlyLogger(object):
+    def __init__(self, f):
+        self.f = f
+
+    def debug(self, msg, *args, **kwargs):
+        self.f.write((msg % args) + '\n')
+
+    info = debug
+
+    def warning(self, msg, *args, **kwargs):
+        self.f.write('WARNING: ' + (msg % args) + '\n')
+
+    def error(self, msg, *args, **kwargs):
+        self.f.write('ERROR: ' + (msg % args) + '\n')
+
+    critical = debug
+
+# Null logger is used when no output is generated. Does nothing.
+class NullLogger(object):
+    def __getattribute__(self, name):
+        return self
+
+    def __call__(self, *args, **kwargs):
+        return self
+
+# Exception raised for yacc-related errors
+class YaccError(Exception):
+    pass
+
+# Format the result message that the parser produces when running in debug mode.
+def format_result(r):
+    repr_str = repr(r)
+    if '\n' in repr_str:
+        repr_str = repr(repr_str)
+    if len(repr_str) > resultlimit:
+        repr_str = repr_str[:resultlimit] + ' ...'
+    result = '<%s @ 0x%x> (%s)' % (type(r).__name__, id(r), repr_str)
+    return result
+
+# Format stack entries when the parser is running in debug mode
+def format_stack_entry(r):
+    repr_str = repr(r)
+    if '\n' in repr_str:
+        repr_str = repr(repr_str)
+    if len(repr_str) < 16:
+        return repr_str
+    else:
+        return '<%s @ 0x%x>' % (type(r).__name__, id(r))
+
+# Panic mode error recovery support.   This feature is being reworked--much of the
+# code here is to offer a deprecation/backwards compatible transition
+
+_errok = None
+_token = None
+_restart = None
+_warnmsg = '''PLY: Don't use global functions errok(), token(), and restart() in p_error().
+Instead, invoke the methods on the associated parser instance:
+
+    def p_error(p):
+        ...
+        # Use parser.errok(), parser.token(), parser.restart()
+        ...
+
+    parser = yacc.yacc()
+'''
+
+def errok():
+    warnings.warn(_warnmsg)
+    return _errok()
+
+def restart():
+    warnings.warn(_warnmsg)
+    return _restart()
+
+def token():
+    warnings.warn(_warnmsg)
+    return _token()
+
+# Utility function to call the p_error() function with some deprecation hacks
+def call_errorfunc(errorfunc, token, parser):
+    global _errok, _token, _restart
+    _errok = parser.errok
+    _token = parser.token
+    _restart = parser.restart
+    r = errorfunc(token)
+    try:
+        del _errok, _token, _restart
+    except NameError:
+        pass
+    return r
+
+#-----------------------------------------------------------------------------
+#                        ===  LR Parsing Engine ===
+#
+# The following classes are used for the LR parser itself.  These are not
+# used during table construction and are independent of the actual LR
+# table generation algorithm
+#-----------------------------------------------------------------------------
+
+# This class is used to hold non-terminal grammar symbols during parsing.
+# It normally has the following attributes set:
+#        .type       = Grammar symbol type
+#        .value      = Symbol value
+#        .lineno     = Starting line number
+#        .endlineno  = Ending line number (optional, set automatically)
+#        .lexpos     = Starting lex position
+#        .endlexpos  = Ending lex position (optional, set automatically)
+
+class YaccSymbol:
+    def __str__(self):
+        return self.type
+
+    def __repr__(self):
+        return str(self)
+
+# This class is a wrapper around the objects actually passed to each
+# grammar rule.   Index lookup and assignment actually assign the
+# .value attribute of the underlying YaccSymbol object.
+# The lineno() method returns the line number of a given
+# item (or 0 if not defined).   The linespan() method returns
+# a tuple of (startline,endline) representing the range of lines
+# for a symbol.  The lexspan() method returns a tuple (lexpos,endlexpos)
+# representing the range of positional information for a symbol.
+
+class YaccProduction:
+    def __init__(self, s, stack=None):
+        self.slice = s
+        self.stack = stack
+        self.lexer = None
+        self.parser = None
+
+    def __getitem__(self, n):
+        if isinstance(n, slice):
+            return [s.value for s in self.slice[n]]
+        elif n >= 0:
+            return self.slice[n].value
+        else:
+            return self.stack[n].value
+
+    def __setitem__(self, n, v):
+        self.slice[n].value = v
+
+    def __getslice__(self, i, j):
+        return [s.value for s in self.slice[i:j]]
+
+    def __len__(self):
+        return len(self.slice)
+
+    def lineno(self, n):
+        return getattr(self.slice[n], 'lineno', 0)
+
+    def set_lineno(self, n, lineno):
+        self.slice[n].lineno = lineno
+
+    def linespan(self, n):
+        startline = getattr(self.slice[n], 'lineno', 0)
+        endline = getattr(self.slice[n], 'endlineno', startline)
+        return startline, endline
+
+    def lexpos(self, n):
+        return getattr(self.slice[n], 'lexpos', 0)
+
+    def set_lexpos(self, n, lexpos):
+        self.slice[n].lexpos = lexpos
+
+    def lexspan(self, n):
+        startpos = getattr(self.slice[n], 'lexpos', 0)
+        endpos = getattr(self.slice[n], 'endlexpos', startpos)
+        return startpos, endpos
+
+    def error(self):
+        raise SyntaxError
+
+# -----------------------------------------------------------------------------
+#                               == LRParser ==
+#
+# The LR Parsing engine.
+# -----------------------------------------------------------------------------
+
+class LRParser:
+    def __init__(self, lrtab, errorf):
+        self.productions = lrtab.lr_productions
+        self.action = lrtab.lr_action
+        self.goto = lrtab.lr_goto
+        self.errorfunc = errorf
+        self.set_defaulted_states()
+        self.errorok = True
+
+    def errok(self):
+        self.errorok = True
+
+    def restart(self):
+        del self.statestack[:]
+        del self.symstack[:]
+        sym = YaccSymbol()
+        sym.type = '$end'
+        self.symstack.append(sym)
+        self.statestack.append(0)
+
+    # Defaulted state support.
+    # This method identifies parser states where there is only one possible reduction action.
+    # For such states, the parser can make a choose to make a rule reduction without consuming
+    # the next look-ahead token.  This delayed invocation of the tokenizer can be useful in
+    # certain kinds of advanced parsing situations where the lexer and parser interact with
+    # each other or change states (i.e., manipulation of scope, lexer states, etc.).
+    #
+    # See:  http://www.gnu.org/software/bison/manual/html_node/Default-Reductions.html#Default-Reductions
+    def set_defaulted_states(self):
+        self.defaulted_states = {}
+        for state, actions in self.action.items():
+            rules = list(actions.values())
+            if len(rules) == 1 and rules[0] < 0:
+                self.defaulted_states[state] = rules[0]
+
+    def disable_defaulted_states(self):
+        self.defaulted_states = {}
+
+    def parse(self, input=None, lexer=None, debug=False, tracking=False, tokenfunc=None):
+        if debug or yaccdevel:
+            if isinstance(debug, int):
+                debug = PlyLogger(sys.stderr)
+            return self.parsedebug(input, lexer, debug, tracking, tokenfunc)
+        elif tracking:
+            return self.parseopt(input, lexer, debug, tracking, tokenfunc)
+        else:
+            return self.parseopt_notrack(input, lexer, debug, tracking, tokenfunc)
+
+
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+    # parsedebug().
+    #
+    # This is the debugging enabled version of parse().  All changes made to the
+    # parsing engine should be made here.   Optimized versions of this function
+    # are automatically created by the ply/ygen.py script.  This script cuts out
+    # sections enclosed in markers such as this:
+    #
+    #      #--! DEBUG
+    #      statements
+    #      #--! DEBUG
+    #
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+    def parsedebug(self, input=None, lexer=None, debug=False, tracking=False, tokenfunc=None):
+        #--! parsedebug-start
+        lookahead = None                         # Current lookahead symbol
+        lookaheadstack = []                      # Stack of lookahead symbols
+        actions = self.action                    # Local reference to action table (to avoid lookup on self.)
+        goto    = self.goto                      # Local reference to goto table (to avoid lookup on self.)
+        prod    = self.productions               # Local reference to production list (to avoid lookup on self.)
+        defaulted_states = self.defaulted_states # Local reference to defaulted states
+        pslice  = YaccProduction(None)           # Production object passed to grammar rules
+        errorcount = 0                           # Used during error recovery
+
+        #--! DEBUG
+        debug.info('PLY: PARSE DEBUG START')
+        #--! DEBUG
+
+        # If no lexer was given, we will try to use the lex module
+        if not lexer:
+            from . import lex
+            lexer = lex.lexer
+
+        # Set up the lexer and parser objects on pslice
+        pslice.lexer = lexer
+        pslice.parser = self
+
+        # If input was supplied, pass to lexer
+        if input is not None:
+            lexer.input(input)
+
+        if tokenfunc is None:
+            # Tokenize function
+            get_token = lexer.token
+        else:
+            get_token = tokenfunc
+
+        # Set the parser() token method (sometimes used in error recovery)
+        self.token = get_token
+
+        # Set up the state and symbol stacks
+
+        statestack = []                # Stack of parsing states
+        self.statestack = statestack
+        symstack   = []                # Stack of grammar symbols
+        self.symstack = symstack
+
+        pslice.stack = symstack         # Put in the production
+        errtoken   = None               # Err token
+
+        # The start state is assumed to be (0,$end)
+
+        statestack.append(0)
+        sym = YaccSymbol()
+        sym.type = '$end'
+        symstack.append(sym)
+        state = 0
+        while True:
+            # Get the next symbol on the input.  If a lookahead symbol
+            # is already set, we just use that. Otherwise, we'll pull
+            # the next token off of the lookaheadstack or from the lexer
+
+            #--! DEBUG
+            debug.debug('')
+            debug.debug('State  : %s', state)
+            #--! DEBUG
+
+            if state not in defaulted_states:
+                if not lookahead:
+                    if not lookaheadstack:
+                        lookahead = get_token()     # Get the next token
+                    else:
+                        lookahead = lookaheadstack.pop()
+                    if not lookahead:
+                        lookahead = YaccSymbol()
+                        lookahead.type = '$end'
+
+                # Check the action table
+                ltype = lookahead.type
+                t = actions[state].get(ltype)
+            else:
+                t = defaulted_states[state]
+                #--! DEBUG
+                debug.debug('Defaulted state %s: Reduce using %d', state, -t)
+                #--! DEBUG
+
+            #--! DEBUG
+            debug.debug('Stack  : %s',
+                        ('%s . %s' % (' '.join([xx.type for xx in symstack][1:]), str(lookahead))).lstrip())
+            #--! DEBUG
+
+            if t is not None:
+                if t > 0:
+                    # shift a symbol on the stack
+                    statestack.append(t)
+                    state = t
+
+                    #--! DEBUG
+                    debug.debug('Action : Shift and goto state %s', t)
+                    #--! DEBUG
+
+                    symstack.append(lookahead)
+                    lookahead = None
+
+                    # Decrease error count on successful shift
+                    if errorcount:
+                        errorcount -= 1
+                    continue
+
+                if t < 0:
+                    # reduce a symbol on the stack, emit a production
+                    p = prod[-t]
+                    pname = p.name
+                    plen  = p.len
+
+                    # Get production function
+                    sym = YaccSymbol()
+                    sym.type = pname       # Production name
+                    sym.value = None
+
+                    #--! DEBUG
+                    if plen:
+                        debug.info('Action : Reduce rule [%s] with %s and goto state %d', p.str,
+                                   '['+','.join([format_stack_entry(_v.value) for _v in symstack[-plen:]])+']',
+                                   goto[statestack[-1-plen]][pname])
+                    else:
+                        debug.info('Action : Reduce rule [%s] with %s and goto state %d', p.str, [],
+                                   goto[statestack[-1]][pname])
+
+                    #--! DEBUG
+
+                    if plen:
+                        targ = symstack[-plen-1:]
+                        targ[0] = sym
+
+                        #--! TRACKING
+                        if tracking:
+                            t1 = targ[1]
+                            sym.lineno = t1.lineno
+                            sym.lexpos = t1.lexpos
+                            t1 = targ[-1]
+                            sym.endlineno = getattr(t1, 'endlineno', t1.lineno)
+                            sym.endlexpos = getattr(t1, 'endlexpos', t1.lexpos)
+                        #--! TRACKING
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # below as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            del symstack[-plen:]
+                            self.state = state
+                            p.callable(pslice)
+                            del statestack[-plen:]
+                            #--! DEBUG
+                            debug.info('Result : %s', format_result(pslice[0]))
+                            #--! DEBUG
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            symstack.extend(targ[1:-1])         # Put the production slice back on the stack
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                    else:
+
+                        #--! TRACKING
+                        if tracking:
+                            sym.lineno = lexer.lineno
+                            sym.lexpos = lexer.lexpos
+                        #--! TRACKING
+
+                        targ = [sym]
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # above as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            self.state = state
+                            p.callable(pslice)
+                            #--! DEBUG
+                            debug.info('Result : %s', format_result(pslice[0]))
+                            #--! DEBUG
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                if t == 0:
+                    n = symstack[-1]
+                    result = getattr(n, 'value', None)
+                    #--! DEBUG
+                    debug.info('Done   : Returning %s', format_result(result))
+                    debug.info('PLY: PARSE DEBUG END')
+                    #--! DEBUG
+                    return result
+
+            if t is None:
+
+                #--! DEBUG
+                debug.error('Error  : %s',
+                            ('%s . %s' % (' '.join([xx.type for xx in symstack][1:]), str(lookahead))).lstrip())
+                #--! DEBUG
+
+                # We have some kind of parsing error here.  To handle
+                # this, we are going to push the current token onto
+                # the tokenstack and replace it with an 'error' token.
+                # If there are any synchronization rules, they may
+                # catch it.
+                #
+                # In addition to pushing the error token, we call call
+                # the user defined p_error() function if this is the
+                # first syntax error.  This function is only called if
+                # errorcount == 0.
+                if errorcount == 0 or self.errorok:
+                    errorcount = error_count
+                    self.errorok = False
+                    errtoken = lookahead
+                    if errtoken.type == '$end':
+                        errtoken = None               # End of file!
+                    if self.errorfunc:
+                        if errtoken and not hasattr(errtoken, 'lexer'):
+                            errtoken.lexer = lexer
+                        self.state = state
+                        tok = call_errorfunc(self.errorfunc, errtoken, self)
+                        if self.errorok:
+                            # User must have done some kind of panic
+                            # mode recovery on their own.  The
+                            # returned token is the next lookahead
+                            lookahead = tok
+                            errtoken = None
+                            continue
+                    else:
+                        if errtoken:
+                            if hasattr(errtoken, 'lineno'):
+                                lineno = lookahead.lineno
+                            else:
+                                lineno = 0
+                            if lineno:
+                                sys.stderr.write('yacc: Syntax error at line %d, token=%s\n' % (lineno, errtoken.type))
+                            else:
+                                sys.stderr.write('yacc: Syntax error, token=%s' % errtoken.type)
+                        else:
+                            sys.stderr.write('yacc: Parse error in input. EOF\n')
+                            return
+
+                else:
+                    errorcount = error_count
+
+                # case 1:  the statestack only has 1 entry on it.  If we're in this state, the
+                # entire parse has been rolled back and we're completely hosed.   The token is
+                # discarded and we just keep going.
+
+                if len(statestack) <= 1 and lookahead.type != '$end':
+                    lookahead = None
+                    errtoken = None
+                    state = 0
+                    # Nuke the pushback stack
+                    del lookaheadstack[:]
+                    continue
+
+                # case 2: the statestack has a couple of entries on it, but we're
+                # at the end of the file. nuke the top entry and generate an error token
+
+                # Start nuking entries on the stack
+                if lookahead.type == '$end':
+                    # Whoa. We're really hosed here. Bail out
+                    return
+
+                if lookahead.type != 'error':
+                    sym = symstack[-1]
+                    if sym.type == 'error':
+                        # Hmmm. Error is on top of stack, we'll just nuke input
+                        # symbol and continue
+                        #--! TRACKING
+                        if tracking:
+                            sym.endlineno = getattr(lookahead, 'lineno', sym.lineno)
+                            sym.endlexpos = getattr(lookahead, 'lexpos', sym.lexpos)
+                        #--! TRACKING
+                        lookahead = None
+                        continue
+
+                    # Create the error symbol for the first time and make it the new lookahead symbol
+                    t = YaccSymbol()
+                    t.type = 'error'
+
+                    if hasattr(lookahead, 'lineno'):
+                        t.lineno = t.endlineno = lookahead.lineno
+                    if hasattr(lookahead, 'lexpos'):
+                        t.lexpos = t.endlexpos = lookahead.lexpos
+                    t.value = lookahead
+                    lookaheadstack.append(lookahead)
+                    lookahead = t
+                else:
+                    sym = symstack.pop()
+                    #--! TRACKING
+                    if tracking:
+                        lookahead.lineno = sym.lineno
+                        lookahead.lexpos = sym.lexpos
+                    #--! TRACKING
+                    statestack.pop()
+                    state = statestack[-1]
+
+                continue
+
+            # Call an error function here
+            raise RuntimeError('yacc: internal parser error!!!\n')
+
+        #--! parsedebug-end
+
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+    # parseopt().
+    #
+    # Optimized version of parse() method.  DO NOT EDIT THIS CODE DIRECTLY!
+    # This code is automatically generated by the ply/ygen.py script. Make
+    # changes to the parsedebug() method instead.
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+    def parseopt(self, input=None, lexer=None, debug=False, tracking=False, tokenfunc=None):
+        #--! parseopt-start
+        lookahead = None                         # Current lookahead symbol
+        lookaheadstack = []                      # Stack of lookahead symbols
+        actions = self.action                    # Local reference to action table (to avoid lookup on self.)
+        goto    = self.goto                      # Local reference to goto table (to avoid lookup on self.)
+        prod    = self.productions               # Local reference to production list (to avoid lookup on self.)
+        defaulted_states = self.defaulted_states # Local reference to defaulted states
+        pslice  = YaccProduction(None)           # Production object passed to grammar rules
+        errorcount = 0                           # Used during error recovery
+
+
+        # If no lexer was given, we will try to use the lex module
+        if not lexer:
+            from . import lex
+            lexer = lex.lexer
+
+        # Set up the lexer and parser objects on pslice
+        pslice.lexer = lexer
+        pslice.parser = self
+
+        # If input was supplied, pass to lexer
+        if input is not None:
+            lexer.input(input)
+
+        if tokenfunc is None:
+            # Tokenize function
+            get_token = lexer.token
+        else:
+            get_token = tokenfunc
+
+        # Set the parser() token method (sometimes used in error recovery)
+        self.token = get_token
+
+        # Set up the state and symbol stacks
+
+        statestack = []                # Stack of parsing states
+        self.statestack = statestack
+        symstack   = []                # Stack of grammar symbols
+        self.symstack = symstack
+
+        pslice.stack = symstack         # Put in the production
+        errtoken   = None               # Err token
+
+        # The start state is assumed to be (0,$end)
+
+        statestack.append(0)
+        sym = YaccSymbol()
+        sym.type = '$end'
+        symstack.append(sym)
+        state = 0
+        while True:
+            # Get the next symbol on the input.  If a lookahead symbol
+            # is already set, we just use that. Otherwise, we'll pull
+            # the next token off of the lookaheadstack or from the lexer
+
+
+            if state not in defaulted_states:
+                if not lookahead:
+                    if not lookaheadstack:
+                        lookahead = get_token()     # Get the next token
+                    else:
+                        lookahead = lookaheadstack.pop()
+                    if not lookahead:
+                        lookahead = YaccSymbol()
+                        lookahead.type = '$end'
+
+                # Check the action table
+                ltype = lookahead.type
+                t = actions[state].get(ltype)
+            else:
+                t = defaulted_states[state]
+
+
+            if t is not None:
+                if t > 0:
+                    # shift a symbol on the stack
+                    statestack.append(t)
+                    state = t
+
+
+                    symstack.append(lookahead)
+                    lookahead = None
+
+                    # Decrease error count on successful shift
+                    if errorcount:
+                        errorcount -= 1
+                    continue
+
+                if t < 0:
+                    # reduce a symbol on the stack, emit a production
+                    p = prod[-t]
+                    pname = p.name
+                    plen  = p.len
+
+                    # Get production function
+                    sym = YaccSymbol()
+                    sym.type = pname       # Production name
+                    sym.value = None
+
+
+                    if plen:
+                        targ = symstack[-plen-1:]
+                        targ[0] = sym
+
+                        #--! TRACKING
+                        if tracking:
+                            t1 = targ[1]
+                            sym.lineno = t1.lineno
+                            sym.lexpos = t1.lexpos
+                            t1 = targ[-1]
+                            sym.endlineno = getattr(t1, 'endlineno', t1.lineno)
+                            sym.endlexpos = getattr(t1, 'endlexpos', t1.lexpos)
+                        #--! TRACKING
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # below as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            del symstack[-plen:]
+                            self.state = state
+                            p.callable(pslice)
+                            del statestack[-plen:]
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            symstack.extend(targ[1:-1])         # Put the production slice back on the stack
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                    else:
+
+                        #--! TRACKING
+                        if tracking:
+                            sym.lineno = lexer.lineno
+                            sym.lexpos = lexer.lexpos
+                        #--! TRACKING
+
+                        targ = [sym]
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # above as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            self.state = state
+                            p.callable(pslice)
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                if t == 0:
+                    n = symstack[-1]
+                    result = getattr(n, 'value', None)
+                    return result
+
+            if t is None:
+
+
+                # We have some kind of parsing error here.  To handle
+                # this, we are going to push the current token onto
+                # the tokenstack and replace it with an 'error' token.
+                # If there are any synchronization rules, they may
+                # catch it.
+                #
+                # In addition to pushing the error token, we call call
+                # the user defined p_error() function if this is the
+                # first syntax error.  This function is only called if
+                # errorcount == 0.
+                if errorcount == 0 or self.errorok:
+                    errorcount = error_count
+                    self.errorok = False
+                    errtoken = lookahead
+                    if errtoken.type == '$end':
+                        errtoken = None               # End of file!
+                    if self.errorfunc:
+                        if errtoken and not hasattr(errtoken, 'lexer'):
+                            errtoken.lexer = lexer
+                        self.state = state
+                        tok = call_errorfunc(self.errorfunc, errtoken, self)
+                        if self.errorok:
+                            # User must have done some kind of panic
+                            # mode recovery on their own.  The
+                            # returned token is the next lookahead
+                            lookahead = tok
+                            errtoken = None
+                            continue
+                    else:
+                        if errtoken:
+                            if hasattr(errtoken, 'lineno'):
+                                lineno = lookahead.lineno
+                            else:
+                                lineno = 0
+                            if lineno:
+                                sys.stderr.write('yacc: Syntax error at line %d, token=%s\n' % (lineno, errtoken.type))
+                            else:
+                                sys.stderr.write('yacc: Syntax error, token=%s' % errtoken.type)
+                        else:
+                            sys.stderr.write('yacc: Parse error in input. EOF\n')
+                            return
+
+                else:
+                    errorcount = error_count
+
+                # case 1:  the statestack only has 1 entry on it.  If we're in this state, the
+                # entire parse has been rolled back and we're completely hosed.   The token is
+                # discarded and we just keep going.
+
+                if len(statestack) <= 1 and lookahead.type != '$end':
+                    lookahead = None
+                    errtoken = None
+                    state = 0
+                    # Nuke the pushback stack
+                    del lookaheadstack[:]
+                    continue
+
+                # case 2: the statestack has a couple of entries on it, but we're
+                # at the end of the file. nuke the top entry and generate an error token
+
+                # Start nuking entries on the stack
+                if lookahead.type == '$end':
+                    # Whoa. We're really hosed here. Bail out
+                    return
+
+                if lookahead.type != 'error':
+                    sym = symstack[-1]
+                    if sym.type == 'error':
+                        # Hmmm. Error is on top of stack, we'll just nuke input
+                        # symbol and continue
+                        #--! TRACKING
+                        if tracking:
+                            sym.endlineno = getattr(lookahead, 'lineno', sym.lineno)
+                            sym.endlexpos = getattr(lookahead, 'lexpos', sym.lexpos)
+                        #--! TRACKING
+                        lookahead = None
+                        continue
+
+                    # Create the error symbol for the first time and make it the new lookahead symbol
+                    t = YaccSymbol()
+                    t.type = 'error'
+
+                    if hasattr(lookahead, 'lineno'):
+                        t.lineno = t.endlineno = lookahead.lineno
+                    if hasattr(lookahead, 'lexpos'):
+                        t.lexpos = t.endlexpos = lookahead.lexpos
+                    t.value = lookahead
+                    lookaheadstack.append(lookahead)
+                    lookahead = t
+                else:
+                    sym = symstack.pop()
+                    #--! TRACKING
+                    if tracking:
+                        lookahead.lineno = sym.lineno
+                        lookahead.lexpos = sym.lexpos
+                    #--! TRACKING
+                    statestack.pop()
+                    state = statestack[-1]
+
+                continue
+
+            # Call an error function here
+            raise RuntimeError('yacc: internal parser error!!!\n')
+
+        #--! parseopt-end
+
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+    # parseopt_notrack().
+    #
+    # Optimized version of parseopt() with line number tracking removed.
+    # DO NOT EDIT THIS CODE DIRECTLY. This code is automatically generated
+    # by the ply/ygen.py script. Make changes to the parsedebug() method instead.
+    # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+    def parseopt_notrack(self, input=None, lexer=None, debug=False, tracking=False, tokenfunc=None):
+        #--! parseopt-notrack-start
+        lookahead = None                         # Current lookahead symbol
+        lookaheadstack = []                      # Stack of lookahead symbols
+        actions = self.action                    # Local reference to action table (to avoid lookup on self.)
+        goto    = self.goto                      # Local reference to goto table (to avoid lookup on self.)
+        prod    = self.productions               # Local reference to production list (to avoid lookup on self.)
+        defaulted_states = self.defaulted_states # Local reference to defaulted states
+        pslice  = YaccProduction(None)           # Production object passed to grammar rules
+        errorcount = 0                           # Used during error recovery
+
+
+        # If no lexer was given, we will try to use the lex module
+        if not lexer:
+            from . import lex
+            lexer = lex.lexer
+
+        # Set up the lexer and parser objects on pslice
+        pslice.lexer = lexer
+        pslice.parser = self
+
+        # If input was supplied, pass to lexer
+        if input is not None:
+            lexer.input(input)
+
+        if tokenfunc is None:
+            # Tokenize function
+            get_token = lexer.token
+        else:
+            get_token = tokenfunc
+
+        # Set the parser() token method (sometimes used in error recovery)
+        self.token = get_token
+
+        # Set up the state and symbol stacks
+
+        statestack = []                # Stack of parsing states
+        self.statestack = statestack
+        symstack   = []                # Stack of grammar symbols
+        self.symstack = symstack
+
+        pslice.stack = symstack         # Put in the production
+        errtoken   = None               # Err token
+
+        # The start state is assumed to be (0,$end)
+
+        statestack.append(0)
+        sym = YaccSymbol()
+        sym.type = '$end'
+        symstack.append(sym)
+        state = 0
+        while True:
+            # Get the next symbol on the input.  If a lookahead symbol
+            # is already set, we just use that. Otherwise, we'll pull
+            # the next token off of the lookaheadstack or from the lexer
+
+
+            if state not in defaulted_states:
+                if not lookahead:
+                    if not lookaheadstack:
+                        lookahead = get_token()     # Get the next token
+                    else:
+                        lookahead = lookaheadstack.pop()
+                    if not lookahead:
+                        lookahead = YaccSymbol()
+                        lookahead.type = '$end'
+
+                # Check the action table
+                ltype = lookahead.type
+                t = actions[state].get(ltype)
+            else:
+                t = defaulted_states[state]
+
+
+            if t is not None:
+                if t > 0:
+                    # shift a symbol on the stack
+                    statestack.append(t)
+                    state = t
+
+
+                    symstack.append(lookahead)
+                    lookahead = None
+
+                    # Decrease error count on successful shift
+                    if errorcount:
+                        errorcount -= 1
+                    continue
+
+                if t < 0:
+                    # reduce a symbol on the stack, emit a production
+                    p = prod[-t]
+                    pname = p.name
+                    plen  = p.len
+
+                    # Get production function
+                    sym = YaccSymbol()
+                    sym.type = pname       # Production name
+                    sym.value = None
+
+
+                    if plen:
+                        targ = symstack[-plen-1:]
+                        targ[0] = sym
+
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # below as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            del symstack[-plen:]
+                            self.state = state
+                            p.callable(pslice)
+                            del statestack[-plen:]
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            symstack.extend(targ[1:-1])         # Put the production slice back on the stack
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                    else:
+
+
+                        targ = [sym]
+
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+                        # The code enclosed in this section is duplicated
+                        # above as a performance optimization.  Make sure
+                        # changes get made in both locations.
+
+                        pslice.slice = targ
+
+                        try:
+                            # Call the grammar rule with our special slice object
+                            self.state = state
+                            p.callable(pslice)
+                            symstack.append(sym)
+                            state = goto[statestack[-1]][pname]
+                            statestack.append(state)
+                        except SyntaxError:
+                            # If an error was set. Enter error recovery state
+                            lookaheadstack.append(lookahead)    # Save the current lookahead token
+                            statestack.pop()                    # Pop back one state (before the reduce)
+                            state = statestack[-1]
+                            sym.type = 'error'
+                            sym.value = 'error'
+                            lookahead = sym
+                            errorcount = error_count
+                            self.errorok = False
+
+                        continue
+                        # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+                if t == 0:
+                    n = symstack[-1]
+                    result = getattr(n, 'value', None)
+                    return result
+
+            if t is None:
+
+
+                # We have some kind of parsing error here.  To handle
+                # this, we are going to push the current token onto
+                # the tokenstack and replace it with an 'error' token.
+                # If there are any synchronization rules, they may
+                # catch it.
+                #
+                # In addition to pushing the error token, we call call
+                # the user defined p_error() function if this is the
+                # first syntax error.  This function is only called if
+                # errorcount == 0.
+                if errorcount == 0 or self.errorok:
+                    errorcount = error_count
+                    self.errorok = False
+                    errtoken = lookahead
+                    if errtoken.type == '$end':
+                        errtoken = None               # End of file!
+                    if self.errorfunc:
+                        if errtoken and not hasattr(errtoken, 'lexer'):
+                            errtoken.lexer = lexer
+                        self.state = state
+                        tok = call_errorfunc(self.errorfunc, errtoken, self)
+                        if self.errorok:
+                            # User must have done some kind of panic
+                            # mode recovery on their own.  The
+                            # returned token is the next lookahead
+                            lookahead = tok
+                            errtoken = None
+                            continue
+                    else:
+                        if errtoken:
+                            if hasattr(errtoken, 'lineno'):
+                                lineno = lookahead.lineno
+                            else:
+                                lineno = 0
+                            if lineno:
+                                sys.stderr.write('yacc: Syntax error at line %d, token=%s\n' % (lineno, errtoken.type))
+                            else:
+                                sys.stderr.write('yacc: Syntax error, token=%s' % errtoken.type)
+                        else:
+                            sys.stderr.write('yacc: Parse error in input. EOF\n')
+                            return
+
+                else:
+                    errorcount = error_count
+
+                # case 1:  the statestack only has 1 entry on it.  If we're in this state, the
+                # entire parse has been rolled back and we're completely hosed.   The token is
+                # discarded and we just keep going.
+
+                if len(statestack) <= 1 and lookahead.type != '$end':
+                    lookahead = None
+                    errtoken = None
+                    state = 0
+                    # Nuke the pushback stack
+                    del lookaheadstack[:]
+                    continue
+
+                # case 2: the statestack has a couple of entries on it, but we're
+                # at the end of the file. nuke the top entry and generate an error token
+
+                # Start nuking entries on the stack
+                if lookahead.type == '$end':
+                    # Whoa. We're really hosed here. Bail out
+                    return
+
+                if lookahead.type != 'error':
+                    sym = symstack[-1]
+                    if sym.type == 'error':
+                        # Hmmm. Error is on top of stack, we'll just nuke input
+                        # symbol and continue
+                        lookahead = None
+                        continue
+
+                    # Create the error symbol for the first time and make it the new lookahead symbol
+                    t = YaccSymbol()
+                    t.type = 'error'
+
+                    if hasattr(lookahead, 'lineno'):
+                        t.lineno = t.endlineno = lookahead.lineno
+                    if hasattr(lookahead, 'lexpos'):
+                        t.lexpos = t.endlexpos = lookahead.lexpos
+                    t.value = lookahead
+                    lookaheadstack.append(lookahead)
+                    lookahead = t
+                else:
+                    sym = symstack.pop()
+                    statestack.pop()
+                    state = statestack[-1]
+
+                continue
+
+            # Call an error function here
+            raise RuntimeError('yacc: internal parser error!!!\n')
+
+        #--! parseopt-notrack-end
+
+# -----------------------------------------------------------------------------
+#                          === Grammar Representation ===
+#
+# The following functions, classes, and variables are used to represent and
+# manipulate the rules that make up a grammar.
+# -----------------------------------------------------------------------------
+
+# regex matching identifiers
+_is_identifier = re.compile(r'^[a-zA-Z0-9_-]+$')
+
+# -----------------------------------------------------------------------------
+# class Production:
+#
+# This class stores the raw information about a single production or grammar rule.
+# A grammar rule refers to a specification such as this:
+#
+#       expr : expr PLUS term
+#
+# Here are the basic attributes defined on all productions
+#
+#       name     - Name of the production.  For example 'expr'
+#       prod     - A list of symbols on the right side ['expr','PLUS','term']
+#       prec     - Production precedence level
+#       number   - Production number.
+#       func     - Function that executes on reduce
+#       file     - File where production function is defined
+#       lineno   - Line number where production function is defined
+#
+# The following attributes are defined or optional.
+#
+#       len       - Length of the production (number of symbols on right hand side)
+#       usyms     - Set of unique symbols found in the production
+# -----------------------------------------------------------------------------
+
+class Production(object):
+    reduced = 0
+    def __init__(self, number, name, prod, precedence=('right', 0), func=None, file='', line=0):
+        self.name     = name
+        self.prod     = tuple(prod)
+        self.number   = number
+        self.func     = func
+        self.callable = None
+        self.file     = file
+        self.line     = line
+        self.prec     = precedence
+
+        # Internal settings used during table construction
+
+        self.len  = len(self.prod)   # Length of the production
+
+        # Create a list of unique production symbols used in the production
+        self.usyms = []
+        for s in self.prod:
+            if s not in self.usyms:
+                self.usyms.append(s)
+
+        # List of all LR items for the production
+        self.lr_items = []
+        self.lr_next = None
+
+        # Create a string representation
+        if self.prod:
+            self.str = '%s -> %s' % (self.name, ' '.join(self.prod))
+        else:
+            self.str = '%s -> <empty>' % self.name
+
+    def __str__(self):
+        return self.str
+
+    def __repr__(self):
+        return 'Production(' + str(self) + ')'
+
+    def __len__(self):
+        return len(self.prod)
+
+    def __nonzero__(self):
+        return 1
+
+    def __getitem__(self, index):
+        return self.prod[index]
+
+    # Return the nth lr_item from the production (or None if at the end)
+    def lr_item(self, n):
+        if n > len(self.prod):
+            return None
+        p = LRItem(self, n)
+        # Precompute the list of productions immediately following.
+        try:
+            p.lr_after = self.Prodnames[p.prod[n+1]]
+        except (IndexError, KeyError):
+            p.lr_after = []
+        try:
+            p.lr_before = p.prod[n-1]
+        except IndexError:
+            p.lr_before = None
+        return p
+
+    # Bind the production function name to a callable
+    def bind(self, pdict):
+        if self.func:
+            self.callable = pdict[self.func]
+
+# This class serves as a minimal standin for Production objects when
+# reading table data from files.   It only contains information
+# actually used by the LR parsing engine, plus some additional
+# debugging information.
+class MiniProduction(object):
+    def __init__(self, str, name, len, func, file, line):
+        self.name     = name
+        self.len      = len
+        self.func     = func
+        self.callable = None
+        self.file     = file
+        self.line     = line
+        self.str      = str
+
+    def __str__(self):
+        return self.str
+
+    def __repr__(self):
+        return 'MiniProduction(%s)' % self.str
+
+    # Bind the production function name to a callable
+    def bind(self, pdict):
+        if self.func:
+            self.callable = pdict[self.func]
+
+
+# -----------------------------------------------------------------------------
+# class LRItem
+#
+# This class represents a specific stage of parsing a production rule.  For
+# example:
+#
+#       expr : expr . PLUS term
+#
+# In the above, the "." represents the current location of the parse.  Here
+# basic attributes:
+#
+#       name       - Name of the production.  For example 'expr'
+#       prod       - A list of symbols on the right side ['expr','.', 'PLUS','term']
+#       number     - Production number.
+#
+#       lr_next      Next LR item. Example, if we are ' expr -> expr . PLUS term'
+#                    then lr_next refers to 'expr -> expr PLUS . term'
+#       lr_index   - LR item index (location of the ".") in the prod list.
+#       lookaheads - LALR lookahead symbols for this item
+#       len        - Length of the production (number of symbols on right hand side)
+#       lr_after    - List of all productions that immediately follow
+#       lr_before   - Grammar symbol immediately before
+# -----------------------------------------------------------------------------
+
+class LRItem(object):
+    def __init__(self, p, n):
+        self.name       = p.name
+        self.prod       = list(p.prod)
+        self.number     = p.number
+        self.lr_index   = n
+        self.lookaheads = {}
+        self.prod.insert(n, '.')
+        self.prod       = tuple(self.prod)
+        self.len        = len(self.prod)
+        self.usyms      = p.usyms
+
+    def __str__(self):
+        if self.prod:
+            s = '%s -> %s' % (self.name, ' '.join(self.prod))
+        else:
+            s = '%s -> <empty>' % self.name
+        return s
+
+    def __repr__(self):
+        return 'LRItem(' + str(self) + ')'
+
+# -----------------------------------------------------------------------------
+# rightmost_terminal()
+#
+# Return the rightmost terminal from a list of symbols.  Used in add_production()
+# -----------------------------------------------------------------------------
+def rightmost_terminal(symbols, terminals):
+    i = len(symbols) - 1
+    while i >= 0:
+        if symbols[i] in terminals:
+            return symbols[i]
+        i -= 1
+    return None
+
+# -----------------------------------------------------------------------------
+#                           === GRAMMAR CLASS ===
+#
+# The following class represents the contents of the specified grammar along
+# with various computed properties such as first sets, follow sets, LR items, etc.
+# This data is used for critical parts of the table generation process later.
+# -----------------------------------------------------------------------------
+
+class GrammarError(YaccError):
+    pass
+
+class Grammar(object):
+    def __init__(self, terminals):
+        self.Productions  = [None]  # A list of all of the productions.  The first
+                                    # entry is always reserved for the purpose of
+                                    # building an augmented grammar
+
+        self.Prodnames    = {}      # A dictionary mapping the names of nonterminals to a list of all
+                                    # productions of that nonterminal.
+
+        self.Prodmap      = {}      # A dictionary that is only used to detect duplicate
+                                    # productions.
+
+        self.Terminals    = {}      # A dictionary mapping the names of terminal symbols to a
+                                    # list of the rules where they are used.
+
+        for term in terminals:
+            self.Terminals[term] = []
+
+        self.Terminals['error'] = []
+
+        self.Nonterminals = {}      # A dictionary mapping names of nonterminals to a list
+                                    # of rule numbers where they are used.
+
+        self.First        = {}      # A dictionary of precomputed FIRST(x) symbols
+
+        self.Follow       = {}      # A dictionary of precomputed FOLLOW(x) symbols
+
+        self.Precedence   = {}      # Precedence rules for each terminal. Contains tuples of the
+                                    # form ('right',level) or ('nonassoc', level) or ('left',level)
+
+        self.UsedPrecedence = set() # Precedence rules that were actually used by the grammer.
+                                    # This is only used to provide error checking and to generate
+                                    # a warning about unused precedence rules.
+
+        self.Start = None           # Starting symbol for the grammar
+
+
+    def __len__(self):
+        return len(self.Productions)
+
+    def __getitem__(self, index):
+        return self.Productions[index]
+
+    # -----------------------------------------------------------------------------
+    # set_precedence()
+    #
+    # Sets the precedence for a given terminal. assoc is the associativity such as
+    # 'left','right', or 'nonassoc'.  level is a numeric level.
+    #
+    # -----------------------------------------------------------------------------
+
+    def set_precedence(self, term, assoc, level):
+        assert self.Productions == [None], 'Must call set_precedence() before add_production()'
+        if term in self.Precedence:
+            raise GrammarError('Precedence already specified for terminal %r' % term)
+        if assoc not in ['left', 'right', 'nonassoc']:
+            raise GrammarError("Associativity must be one of 'left','right', or 'nonassoc'")
+        self.Precedence[term] = (assoc, level)
+
+    # -----------------------------------------------------------------------------
+    # add_production()
+    #
+    # Given an action function, this function assembles a production rule and
+    # computes its precedence level.
+    #
+    # The production rule is supplied as a list of symbols.   For example,
+    # a rule such as 'expr : expr PLUS term' has a production name of 'expr' and
+    # symbols ['expr','PLUS','term'].
+    #
+    # Precedence is determined by the precedence of the right-most non-terminal
+    # or the precedence of a terminal specified by %prec.
+    #
+    # A variety of error checks are performed to make sure production symbols
+    # are valid and that %prec is used correctly.
+    # -----------------------------------------------------------------------------
+
+    def add_production(self, prodname, syms, func=None, file='', line=0):
+
+        if prodname in self.Terminals:
+            raise GrammarError('%s:%d: Illegal rule name %r. Already defined as a token' % (file, line, prodname))
+        if prodname == 'error':
+            raise GrammarError('%s:%d: Illegal rule name %r. error is a reserved word' % (file, line, prodname))
+        if not _is_identifier.match(prodname):
+            raise GrammarError('%s:%d: Illegal rule name %r' % (file, line, prodname))
+
+        # Look for literal tokens
+        for n, s in enumerate(syms):
+            if s[0] in "'\"":
+                try:
+                    c = eval(s)
+                    if (len(c) > 1):
+                        raise GrammarError('%s:%d: Literal token %s in rule %r may only be a single character' %
+                                           (file, line, s, prodname))
+                    if c not in self.Terminals:
+                        self.Terminals[c] = []
+                    syms[n] = c
+                    continue
+                except SyntaxError:
+                    pass
+            if not _is_identifier.match(s) and s != '%prec':
+                raise GrammarError('%s:%d: Illegal name %r in rule %r' % (file, line, s, prodname))
+
+        # Determine the precedence level
+        if '%prec' in syms:
+            if syms[-1] == '%prec':
+                raise GrammarError('%s:%d: Syntax error. Nothing follows %%prec' % (file, line))
+            if syms[-2] != '%prec':
+                raise GrammarError('%s:%d: Syntax error. %%prec can only appear at the end of a grammar rule' %
+                                   (file, line))
+            precname = syms[-1]
+            prodprec = self.Precedence.get(precname)
+            if not prodprec:
+                raise GrammarError('%s:%d: Nothing known about the precedence of %r' % (file, line, precname))
+            else:
+                self.UsedPrecedence.add(precname)
+            del syms[-2:]     # Drop %prec from the rule
+        else:
+            # If no %prec, precedence is determined by the rightmost terminal symbol
+            precname = rightmost_terminal(syms, self.Terminals)
+            prodprec = self.Precedence.get(precname, ('right', 0))
+
+        # See if the rule is already in the rulemap
+        map = '%s -> %s' % (prodname, syms)
+        if map in self.Prodmap:
+            m = self.Prodmap[map]
+            raise GrammarError('%s:%d: Duplicate rule %s. ' % (file, line, m) +
+                               'Previous definition at %s:%d' % (m.file, m.line))
+
+        # From this point on, everything is valid.  Create a new Production instance
+        pnumber  = len(self.Productions)
+        if prodname not in self.Nonterminals:
+            self.Nonterminals[prodname] = []
+
+        # Add the production number to Terminals and Nonterminals
+        for t in syms:
+            if t in self.Terminals:
+                self.Terminals[t].append(pnumber)
+            else:
+                if t not in self.Nonterminals:
+                    self.Nonterminals[t] = []
+                self.Nonterminals[t].append(pnumber)
+
+        # Create a production and add it to the list of productions
+        p = Production(pnumber, prodname, syms, prodprec, func, file, line)
+        self.Productions.append(p)
+        self.Prodmap[map] = p
+
+        # Add to the global productions list
+        try:
+            self.Prodnames[prodname].append(p)
+        except KeyError:
+            self.Prodnames[prodname] = [p]
+
+    # -----------------------------------------------------------------------------
+    # set_start()
+    #
+    # Sets the starting symbol and creates the augmented grammar.  Production
+    # rule 0 is S' -> start where start is the start symbol.
+    # -----------------------------------------------------------------------------
+
+    def set_start(self, start=None):
+        if not start:
+            start = self.Productions[1].name
+        if start not in self.Nonterminals:
+            raise GrammarError('start symbol %s undefined' % start)
+        self.Productions[0] = Production(0, "S'", [start])
+        self.Nonterminals[start].append(0)
+        self.Start = start
+
+    # -----------------------------------------------------------------------------
+    # find_unreachable()
+    #
+    # Find all of the nonterminal symbols that can't be reached from the starting
+    # symbol.  Returns a list of nonterminals that can't be reached.
+    # -----------------------------------------------------------------------------
+
+    def find_unreachable(self):
+
+        # Mark all symbols that are reachable from a symbol s
+        def mark_reachable_from(s):
+            if s in reachable:
+                return
+            reachable.add(s)
+            for p in self.Prodnames.get(s, []):
+                for r in p.prod:
+                    mark_reachable_from(r)
+
+        reachable = set()
+        mark_reachable_from(self.Productions[0].prod[0])
+        return [s for s in self.Nonterminals if s not in reachable]
+
+    # -----------------------------------------------------------------------------
+    # infinite_cycles()
+    #
+    # This function looks at the various parsing rules and tries to detect
+    # infinite recursion cycles (grammar rules where there is no possible way
+    # to derive a string of only terminals).
+    # -----------------------------------------------------------------------------
+
+    def infinite_cycles(self):
+        terminates = {}
+
+        # Terminals:
+        for t in self.Terminals:
+            terminates[t] = True
+
+        terminates['$end'] = True
+
+        # Nonterminals:
+
+        # Initialize to false:
+        for n in self.Nonterminals:
+            terminates[n] = False
+
+        # Then propagate termination until no change:
+        while True:
+            some_change = False
+            for (n, pl) in self.Prodnames.items():
+                # Nonterminal n terminates iff any of its productions terminates.
+                for p in pl:
+                    # Production p terminates iff all of its rhs symbols terminate.
+                    for s in p.prod:
+                        if not terminates[s]:
+                            # The symbol s does not terminate,
+                            # so production p does not terminate.
+                            p_terminates = False
+                            break
+                    else:
+                        # didn't break from the loop,
+                        # so every symbol s terminates
+                        # so production p terminates.
+                        p_terminates = True
+
+                    if p_terminates:
+                        # symbol n terminates!
+                        if not terminates[n]:
+                            terminates[n] = True
+                            some_change = True
+                        # Don't need to consider any more productions for this n.
+                        break
+
+            if not some_change:
+                break
+
+        infinite = []
+        for (s, term) in terminates.items():
+            if not term:
+                if s not in self.Prodnames and s not in self.Terminals and s != 'error':
+                    # s is used-but-not-defined, and we've already warned of that,
+                    # so it would be overkill to say that it's also non-terminating.
+                    pass
+                else:
+                    infinite.append(s)
+
+        return infinite
+
+    # -----------------------------------------------------------------------------
+    # undefined_symbols()
+    #
+    # Find all symbols that were used the grammar, but not defined as tokens or
+    # grammar rules.  Returns a list of tuples (sym, prod) where sym in the symbol
+    # and prod is the production where the symbol was used.
+    # -----------------------------------------------------------------------------
+    def undefined_symbols(self):
+        result = []
+        for p in self.Productions:
+            if not p:
+                continue
+
+            for s in p.prod:
+                if s not in self.Prodnames and s not in self.Terminals and s != 'error':
+                    result.append((s, p))
+        return result
+
+    # -----------------------------------------------------------------------------
+    # unused_terminals()
+    #
+    # Find all terminals that were defined, but not used by the grammar.  Returns
+    # a list of all symbols.
+    # -----------------------------------------------------------------------------
+    def unused_terminals(self):
+        unused_tok = []
+        for s, v in self.Terminals.items():
+            if s != 'error' and not v:
+                unused_tok.append(s)
+
+        return unused_tok
+
+    # ------------------------------------------------------------------------------
+    # unused_rules()
+    #
+    # Find all grammar rules that were defined,  but not used (maybe not reachable)
+    # Returns a list of productions.
+    # ------------------------------------------------------------------------------
+
+    def unused_rules(self):
+        unused_prod = []
+        for s, v in self.Nonterminals.items():
+            if not v:
+                p = self.Prodnames[s][0]
+                unused_prod.append(p)
+        return unused_prod
+
+    # -----------------------------------------------------------------------------
+    # unused_precedence()
+    #
+    # Returns a list of tuples (term,precedence) corresponding to precedence
+    # rules that were never used by the grammar.  term is the name of the terminal
+    # on which precedence was applied and precedence is a string such as 'left' or
+    # 'right' corresponding to the type of precedence.
+    # -----------------------------------------------------------------------------
+
+    def unused_precedence(self):
+        unused = []
+        for termname in self.Precedence:
+            if not (termname in self.Terminals or termname in self.UsedPrecedence):
+                unused.append((termname, self.Precedence[termname][0]))
+
+        return unused
+
+    # -------------------------------------------------------------------------
+    # _first()
+    #
+    # Compute the value of FIRST1(beta) where beta is a tuple of symbols.
+    #
+    # During execution of compute_first1, the result may be incomplete.
+    # Afterward (e.g., when called from compute_follow()), it will be complete.
+    # -------------------------------------------------------------------------
+    def _first(self, beta):
+
+        # We are computing First(x1,x2,x3,...,xn)
+        result = []
+        for x in beta:
+            x_produces_empty = False
+
+            # Add all the non-<empty> symbols of First[x] to the result.
+            for f in self.First[x]:
+                if f == '<empty>':
+                    x_produces_empty = True
+                else:
+                    if f not in result:
+                        result.append(f)
+
+            if x_produces_empty:
+                # We have to consider the next x in beta,
+                # i.e. stay in the loop.
+                pass
+            else:
+                # We don't have to consider any further symbols in beta.
+                break
+        else:
+            # There was no 'break' from the loop,
+            # so x_produces_empty was true for all x in beta,
+            # so beta produces empty as well.
+            result.append('<empty>')
+
+        return result
+
+    # -------------------------------------------------------------------------
+    # compute_first()
+    #
+    # Compute the value of FIRST1(X) for all symbols
+    # -------------------------------------------------------------------------
+    def compute_first(self):
+        if self.First:
+            return self.First
+
+        # Terminals:
+        for t in self.Terminals:
+            self.First[t] = [t]
+
+        self.First['$end'] = ['$end']
+
+        # Nonterminals:
+
+        # Initialize to the empty set:
+        for n in self.Nonterminals:
+            self.First[n] = []
+
+        # Then propagate symbols until no change:
+        while True:
+            some_change = False
+            for n in self.Nonterminals:
+                for p in self.Prodnames[n]:
+                    for f in self._first(p.prod):
+                        if f not in self.First[n]:
+                            self.First[n].append(f)
+                            some_change = True
+            if not some_change:
+                break
+
+        return self.First
+
+    # ---------------------------------------------------------------------
+    # compute_follow()
+    #
+    # Computes all of the follow sets for every non-terminal symbol.  The
+    # follow set is the set of all symbols that might follow a given
+    # non-terminal.  See the Dragon book, 2nd Ed. p. 189.
+    # ---------------------------------------------------------------------
+    def compute_follow(self, start=None):
+        # If already computed, return the result
+        if self.Follow:
+            return self.Follow
+
+        # If first sets not computed yet, do that first.
+        if not self.First:
+            self.compute_first()
+
+        # Add '$end' to the follow list of the start symbol
+        for k in self.Nonterminals:
+            self.Follow[k] = []
+
+        if not start:
+            start = self.Productions[1].name
+
+        self.Follow[start] = ['$end']
+
+        while True:
+            didadd = False
+            for p in self.Productions[1:]:
+                # Here is the production set
+                for i, B in enumerate(p.prod):
+                    if B in self.Nonterminals:
+                        # Okay. We got a non-terminal in a production
+                        fst = self._first(p.prod[i+1:])
+                        hasempty = False
+                        for f in fst:
+                            if f != '<empty>' and f not in self.Follow[B]:
+                                self.Follow[B].append(f)
+                                didadd = True
+                            if f == '<empty>':
+                                hasempty = True
+                        if hasempty or i == (len(p.prod)-1):
+                            # Add elements of follow(a) to follow(b)
+                            for f in self.Follow[p.name]:
+                                if f not in self.Follow[B]:
+                                    self.Follow[B].append(f)
+                                    didadd = True
+            if not didadd:
+                break
+        return self.Follow
+
+
+    # -----------------------------------------------------------------------------
+    # build_lritems()
+    #
+    # This function walks the list of productions and builds a complete set of the
+    # LR items.  The LR items are stored in two ways:  First, they are uniquely
+    # numbered and placed in the list _lritems.  Second, a linked list of LR items
+    # is built for each production.  For example:
+    #
+    #   E -> E PLUS E
+    #
+    # Creates the list
+    #
+    #  [E -> . E PLUS E, E -> E . PLUS E, E -> E PLUS . E, E -> E PLUS E . ]
+    # -----------------------------------------------------------------------------
+
+    def build_lritems(self):
+        for p in self.Productions:
+            lastlri = p
+            i = 0
+            lr_items = []
+            while True:
+                if i > len(p):
+                    lri = None
+                else:
+                    lri = LRItem(p, i)
+                    # Precompute the list of productions immediately following
+                    try:
+                        lri.lr_after = self.Prodnames[lri.prod[i+1]]
+                    except (IndexError, KeyError):
+                        lri.lr_after = []
+                    try:
+                        lri.lr_before = lri.prod[i-1]
+                    except IndexError:
+                        lri.lr_before = None
+
+                lastlri.lr_next = lri
+                if not lri:
+                    break
+                lr_items.append(lri)
+                lastlri = lri
+                i += 1
+            p.lr_items = lr_items
+
+# -----------------------------------------------------------------------------
+#                            == Class LRTable ==
+#
+# This basic class represents a basic table of LR parsing information.
+# Methods for generating the tables are not defined here.  They are defined
+# in the derived class LRGeneratedTable.
+# -----------------------------------------------------------------------------
+
+class VersionError(YaccError):
+    pass
+
+class LRTable(object):
+    def __init__(self):
+        self.lr_action = None
+        self.lr_goto = None
+        self.lr_productions = None
+        self.lr_method = None
+
+    def read_table(self, module):
+        if isinstance(module, types.ModuleType):
+            parsetab = module
+        else:
+            exec('import %s' % module)
+            parsetab = sys.modules[module]
+
+        if parsetab._tabversion != __tabversion__:
+            raise VersionError('yacc table file version is out of date')
+
+        self.lr_action = parsetab._lr_action
+        self.lr_goto = parsetab._lr_goto
+
+        self.lr_productions = []
+        for p in parsetab._lr_productions:
+            self.lr_productions.append(MiniProduction(*p))
+
+        self.lr_method = parsetab._lr_method
+        return parsetab._lr_signature
+
+    def read_pickle(self, filename):
+        try:
+            import cPickle as pickle
+        except ImportError:
+            import pickle
+
+        if not os.path.exists(filename):
+          raise ImportError
+
+        in_f = open(filename, 'rb')
+
+        tabversion = pickle.load(in_f)
+        if tabversion != __tabversion__:
+            raise VersionError('yacc table file version is out of date')
+        self.lr_method = pickle.load(in_f)
+        signature      = pickle.load(in_f)
+        self.lr_action = pickle.load(in_f)
+        self.lr_goto   = pickle.load(in_f)
+        productions    = pickle.load(in_f)
+
+        self.lr_productions = []
+        for p in productions:
+            self.lr_productions.append(MiniProduction(*p))
+
+        in_f.close()
+        return signature
+
+    # Bind all production function names to callable objects in pdict
+    def bind_callables(self, pdict):
+        for p in self.lr_productions:
+            p.bind(pdict)
+
+
+# -----------------------------------------------------------------------------
+#                           === LR Generator ===
+#
+# The following classes and functions are used to generate LR parsing tables on
+# a grammar.
+# -----------------------------------------------------------------------------
+
+# -----------------------------------------------------------------------------
+# digraph()
+# traverse()
+#
+# The following two functions are used to compute set valued functions
+# of the form:
+#
+#     F(x) = F'(x) U U{F(y) | x R y}
+#
+# This is used to compute the values of Read() sets as well as FOLLOW sets
+# in LALR(1) generation.
+#
+# Inputs:  X    - An input set
+#          R    - A relation
+#          FP   - Set-valued function
+# ------------------------------------------------------------------------------
+
+def digraph(X, R, FP):
+    N = {}
+    for x in X:
+        N[x] = 0
+    stack = []
+    F = {}
+    for x in X:
+        if N[x] == 0:
+            traverse(x, N, stack, F, X, R, FP)
+    return F
+
+def traverse(x, N, stack, F, X, R, FP):
+    stack.append(x)
+    d = len(stack)
+    N[x] = d
+    F[x] = FP(x)             # F(X) <- F'(x)
+
+    rel = R(x)               # Get y's related to x
+    for y in rel:
+        if N[y] == 0:
+            traverse(y, N, stack, F, X, R, FP)
+        N[x] = min(N[x], N[y])
+        for a in F.get(y, []):
+            if a not in F[x]:
+                F[x].append(a)
+    if N[x] == d:
+        N[stack[-1]] = MAXINT
+        F[stack[-1]] = F[x]
+        element = stack.pop()
+        while element != x:
+            N[stack[-1]] = MAXINT
+            F[stack[-1]] = F[x]
+            element = stack.pop()
+
+class LALRError(YaccError):
+    pass
+
+# -----------------------------------------------------------------------------
+#                             == LRGeneratedTable ==
+#
+# This class implements the LR table generation algorithm.  There are no
+# public methods except for write()
+# -----------------------------------------------------------------------------
+
+class LRGeneratedTable(LRTable):
+    def __init__(self, grammar, method='LALR', log=None):
+        if method not in ['SLR', 'LALR']:
+            raise LALRError('Unsupported method %s' % method)
+
+        self.grammar = grammar
+        self.lr_method = method
+
+        # Set up the logger
+        if not log:
+            log = NullLogger()
+        self.log = log
+
+        # Internal attributes
+        self.lr_action     = {}        # Action table
+        self.lr_goto       = {}        # Goto table
+        self.lr_productions  = grammar.Productions    # Copy of grammar Production array
+        self.lr_goto_cache = {}        # Cache of computed gotos
+        self.lr0_cidhash   = {}        # Cache of closures
+
+        self._add_count    = 0         # Internal counter used to detect cycles
+
+        # Diagonistic information filled in by the table generator
+        self.sr_conflict   = 0
+        self.rr_conflict   = 0
+        self.conflicts     = []        # List of conflicts
+
+        self.sr_conflicts  = []
+        self.rr_conflicts  = []
+
+        # Build the tables
+        self.grammar.build_lritems()
+        self.grammar.compute_first()
+        self.grammar.compute_follow()
+        self.lr_parse_table()
+
+    # Compute the LR(0) closure operation on I, where I is a set of LR(0) items.
+
+    def lr0_closure(self, I):
+        self._add_count += 1
+
+        # Add everything in I to J
+        J = I[:]
+        didadd = True
+        while didadd:
+            didadd = False
+            for j in J:
+                for x in j.lr_after:
+                    if getattr(x, 'lr0_added', 0) == self._add_count:
+                        continue
+                    # Add B --> .G to J
+                    J.append(x.lr_next)
+                    x.lr0_added = self._add_count
+                    didadd = True
+
+        return J
+
+    # Compute the LR(0) goto function goto(I,X) where I is a set
+    # of LR(0) items and X is a grammar symbol.   This function is written
+    # in a way that guarantees uniqueness of the generated goto sets
+    # (i.e. the same goto set will never be returned as two different Python
+    # objects).  With uniqueness, we can later do fast set comparisons using
+    # id(obj) instead of element-wise comparison.
+
+    def lr0_goto(self, I, x):
+        # First we look for a previously cached entry
+        g = self.lr_goto_cache.get((id(I), x))
+        if g:
+            return g
+
+        # Now we generate the goto set in a way that guarantees uniqueness
+        # of the result
+
+        s = self.lr_goto_cache.get(x)
+        if not s:
+            s = {}
+            self.lr_goto_cache[x] = s
+
+        gs = []
+        for p in I:
+            n = p.lr_next
+            if n and n.lr_before == x:
+                s1 = s.get(id(n))
+                if not s1:
+                    s1 = {}
+                    s[id(n)] = s1
+                gs.append(n)
+                s = s1
+        g = s.get('$end')
+        if not g:
+            if gs:
+                g = self.lr0_closure(gs)
+                s['$end'] = g
+            else:
+                s['$end'] = gs
+        self.lr_goto_cache[(id(I), x)] = g
+        return g
+
+    # Compute the LR(0) sets of item function
+    def lr0_items(self):
+        C = [self.lr0_closure([self.grammar.Productions[0].lr_next])]
+        i = 0
+        for I in C:
+            self.lr0_cidhash[id(I)] = i
+            i += 1
+
+        # Loop over the items in C and each grammar symbols
+        i = 0
+        while i < len(C):
+            I = C[i]
+            i += 1
+
+            # Collect all of the symbols that could possibly be in the goto(I,X) sets
+            asyms = {}
+            for ii in I:
+                for s in ii.usyms:
+                    asyms[s] = None
+
+            for x in asyms:
+                g = self.lr0_goto(I, x)
+                if not g or id(g) in self.lr0_cidhash:
+                    continue
+                self.lr0_cidhash[id(g)] = len(C)
+                C.append(g)
+
+        return C
+
+    # -----------------------------------------------------------------------------
+    #                       ==== LALR(1) Parsing ====
+    #
+    # LALR(1) parsing is almost exactly the same as SLR except that instead of
+    # relying upon Follow() sets when performing reductions, a more selective
+    # lookahead set that incorporates the state of the LR(0) machine is utilized.
+    # Thus, we mainly just have to focus on calculating the lookahead sets.
+    #
+    # The method used here is due to DeRemer and Pennelo (1982).
+    #
+    # DeRemer, F. L., and T. J. Pennelo: "Efficient Computation of LALR(1)
+    #     Lookahead Sets", ACM Transactions on Programming Languages and Systems,
+    #     Vol. 4, No. 4, Oct. 1982, pp. 615-649
+    #
+    # Further details can also be found in:
+    #
+    #  J. Tremblay and P. Sorenson, "The Theory and Practice of Compiler Writing",
+    #      McGraw-Hill Book Company, (1985).
+    #
+    # -----------------------------------------------------------------------------
+
+    # -----------------------------------------------------------------------------
+    # compute_nullable_nonterminals()
+    #
+    # Creates a dictionary containing all of the non-terminals that might produce
+    # an empty production.
+    # -----------------------------------------------------------------------------
+
+    def compute_nullable_nonterminals(self):
+        nullable = set()
+        num_nullable = 0
+        while True:
+            for p in self.grammar.Productions[1:]:
+                if p.len == 0:
+                    nullable.add(p.name)
+                    continue
+                for t in p.prod:
+                    if t not in nullable:
+                        break
+                else:
+                    nullable.add(p.name)
+            if len(nullable) == num_nullable:
+                break
+            num_nullable = len(nullable)
+        return nullable
+
+    # -----------------------------------------------------------------------------
+    # find_nonterminal_trans(C)
+    #
+    # Given a set of LR(0) items, this functions finds all of the non-terminal
+    # transitions.    These are transitions in which a dot appears immediately before
+    # a non-terminal.   Returns a list of tuples of the form (state,N) where state
+    # is the state number and N is the nonterminal symbol.
+    #
+    # The input C is the set of LR(0) items.
+    # -----------------------------------------------------------------------------
+
+    def find_nonterminal_transitions(self, C):
+        trans = []
+        for stateno, state in enumerate(C):
+            for p in state:
+                if p.lr_index < p.len - 1:
+                    t = (stateno, p.prod[p.lr_index+1])
+                    if t[1] in self.grammar.Nonterminals:
+                        if t not in trans:
+                            trans.append(t)
+        return trans
+
+    # -----------------------------------------------------------------------------
+    # dr_relation()
+    #
+    # Computes the DR(p,A) relationships for non-terminal transitions.  The input
+    # is a tuple (state,N) where state is a number and N is a nonterminal symbol.
+    #
+    # Returns a list of terminals.
+    # -----------------------------------------------------------------------------
+
+    def dr_relation(self, C, trans, nullable):
+        state, N = trans
+        terms = []
+
+        g = self.lr0_goto(C[state], N)
+        for p in g:
+            if p.lr_index < p.len - 1:
+                a = p.prod[p.lr_index+1]
+                if a in self.grammar.Terminals:
+                    if a not in terms:
+                        terms.append(a)
+
+        # This extra bit is to handle the start state
+        if state == 0 and N == self.grammar.Productions[0].prod[0]:
+            terms.append('$end')
+
+        return terms
+
+    # -----------------------------------------------------------------------------
+    # reads_relation()
+    #
+    # Computes the READS() relation (p,A) READS (t,C).
+    # -----------------------------------------------------------------------------
+
+    def reads_relation(self, C, trans, empty):
+        # Look for empty transitions
+        rel = []
+        state, N = trans
+
+        g = self.lr0_goto(C[state], N)
+        j = self.lr0_cidhash.get(id(g), -1)
+        for p in g:
+            if p.lr_index < p.len - 1:
+                a = p.prod[p.lr_index + 1]
+                if a in empty:
+                    rel.append((j, a))
+
+        return rel
+
+    # -----------------------------------------------------------------------------
+    # compute_lookback_includes()
+    #
+    # Determines the lookback and includes relations
+    #
+    # LOOKBACK:
+    #
+    # This relation is determined by running the LR(0) state machine forward.
+    # For example, starting with a production "N : . A B C", we run it forward
+    # to obtain "N : A B C ."   We then build a relationship between this final
+    # state and the starting state.   These relationships are stored in a dictionary
+    # lookdict.
+    #
+    # INCLUDES:
+    #
+    # Computes the INCLUDE() relation (p,A) INCLUDES (p',B).
+    #
+    # This relation is used to determine non-terminal transitions that occur
+    # inside of other non-terminal transition states.   (p,A) INCLUDES (p', B)
+    # if the following holds:
+    #
+    #       B -> LAT, where T -> epsilon and p' -L-> p
+    #
+    # L is essentially a prefix (which may be empty), T is a suffix that must be
+    # able to derive an empty string.  State p' must lead to state p with the string L.
+    #
+    # -----------------------------------------------------------------------------
+
+    def compute_lookback_includes(self, C, trans, nullable):
+        lookdict = {}          # Dictionary of lookback relations
+        includedict = {}       # Dictionary of include relations
+
+        # Make a dictionary of non-terminal transitions
+        dtrans = {}
+        for t in trans:
+            dtrans[t] = 1
+
+        # Loop over all transitions and compute lookbacks and includes
+        for state, N in trans:
+            lookb = []
+            includes = []
+            for p in C[state]:
+                if p.name != N:
+                    continue
+
+                # Okay, we have a name match.  We now follow the production all the way
+                # through the state machine until we get the . on the right hand side
+
+                lr_index = p.lr_index
+                j = state
+                while lr_index < p.len - 1:
+                    lr_index = lr_index + 1
+                    t = p.prod[lr_index]
+
+                    # Check to see if this symbol and state are a non-terminal transition
+                    if (j, t) in dtrans:
+                        # Yes.  Okay, there is some chance that this is an includes relation
+                        # the only way to know for certain is whether the rest of the
+                        # production derives empty
+
+                        li = lr_index + 1
+                        while li < p.len:
+                            if p.prod[li] in self.grammar.Terminals:
+                                break      # No forget it
+                            if p.prod[li] not in nullable:
+                                break
+                            li = li + 1
+                        else:
+                            # Appears to be a relation between (j,t) and (state,N)
+                            includes.append((j, t))
+
+                    g = self.lr0_goto(C[j], t)               # Go to next set
+                    j = self.lr0_cidhash.get(id(g), -1)      # Go to next state
+
+                # When we get here, j is the final state, now we have to locate the production
+                for r in C[j]:
+                    if r.name != p.name:
+                        continue
+                    if r.len != p.len:
+                        continue
+                    i = 0
+                    # This look is comparing a production ". A B C" with "A B C ."
+                    while i < r.lr_index:
+                        if r.prod[i] != p.prod[i+1]:
+                            break
+                        i = i + 1
+                    else:
+                        lookb.append((j, r))
+            for i in includes:
+                if i not in includedict:
+                    includedict[i] = []
+                includedict[i].append((state, N))
+            lookdict[(state, N)] = lookb
+
+        return lookdict, includedict
+
+    # -----------------------------------------------------------------------------
+    # compute_read_sets()
+    #
+    # Given a set of LR(0) items, this function computes the read sets.
+    #
+    # Inputs:  C        =  Set of LR(0) items
+    #          ntrans   = Set of nonterminal transitions
+    #          nullable = Set of empty transitions
+    #
+    # Returns a set containing the read sets
+    # -----------------------------------------------------------------------------
+
+    def compute_read_sets(self, C, ntrans, nullable):
+        FP = lambda x: self.dr_relation(C, x, nullable)
+        R =  lambda x: self.reads_relation(C, x, nullable)
+        F = digraph(ntrans, R, FP)
+        return F
+
+    # -----------------------------------------------------------------------------
+    # compute_follow_sets()
+    #
+    # Given a set of LR(0) items, a set of non-terminal transitions, a readset,
+    # and an include set, this function computes the follow sets
+    #
+    # Follow(p,A) = Read(p,A) U U {Follow(p',B) | (p,A) INCLUDES (p',B)}
+    #
+    # Inputs:
+    #            ntrans     = Set of nonterminal transitions
+    #            readsets   = Readset (previously computed)
+    #            inclsets   = Include sets (previously computed)
+    #
+    # Returns a set containing the follow sets
+    # -----------------------------------------------------------------------------
+
+    def compute_follow_sets(self, ntrans, readsets, inclsets):
+        FP = lambda x: readsets[x]
+        R  = lambda x: inclsets.get(x, [])
+        F = digraph(ntrans, R, FP)
+        return F
+
+    # -----------------------------------------------------------------------------
+    # add_lookaheads()
+    #
+    # Attaches the lookahead symbols to grammar rules.
+    #
+    # Inputs:    lookbacks         -  Set of lookback relations
+    #            followset         -  Computed follow set
+    #
+    # This function directly attaches the lookaheads to productions contained
+    # in the lookbacks set
+    # -----------------------------------------------------------------------------
+
+    def add_lookaheads(self, lookbacks, followset):
+        for trans, lb in lookbacks.items():
+            # Loop over productions in lookback
+            for state, p in lb:
+                if state not in p.lookaheads:
+                    p.lookaheads[state] = []
+                f = followset.get(trans, [])
+                for a in f:
+                    if a not in p.lookaheads[state]:
+                        p.lookaheads[state].append(a)
+
+    # -----------------------------------------------------------------------------
+    # add_lalr_lookaheads()
+    #
+    # This function does all of the work of adding lookahead information for use
+    # with LALR parsing
+    # -----------------------------------------------------------------------------
+
+    def add_lalr_lookaheads(self, C):
+        # Determine all of the nullable nonterminals
+        nullable = self.compute_nullable_nonterminals()
+
+        # Find all non-terminal transitions
+        trans = self.find_nonterminal_transitions(C)
+
+        # Compute read sets
+        readsets = self.compute_read_sets(C, trans, nullable)
+
+        # Compute lookback/includes relations
+        lookd, included = self.compute_lookback_includes(C, trans, nullable)
+
+        # Compute LALR FOLLOW sets
+        followsets = self.compute_follow_sets(trans, readsets, included)
+
+        # Add all of the lookaheads
+        self.add_lookaheads(lookd, followsets)
+
+    # -----------------------------------------------------------------------------
+    # lr_parse_table()
+    #
+    # This function constructs the parse tables for SLR or LALR
+    # -----------------------------------------------------------------------------
+    def lr_parse_table(self):
+        Productions = self.grammar.Productions
+        Precedence  = self.grammar.Precedence
+        goto   = self.lr_goto         # Goto array
+        action = self.lr_action       # Action array
+        log    = self.log             # Logger for output
+
+        actionp = {}                  # Action production array (temporary)
+
+        log.info('Parsing method: %s', self.lr_method)
+
+        # Step 1: Construct C = { I0, I1, ... IN}, collection of LR(0) items
+        # This determines the number of states
+
+        C = self.lr0_items()
+
+        if self.lr_method == 'LALR':
+            self.add_lalr_lookaheads(C)
+
+        # Build the parser table, state by state
+        st = 0
+        for I in C:
+            # Loop over each production in I
+            actlist = []              # List of actions
+            st_action  = {}
+            st_actionp = {}
+            st_goto    = {}
+            log.info('')
+            log.info('state %d', st)
+            log.info('')
+            for p in I:
+                log.info('    (%d) %s', p.number, p)
+            log.info('')
+
+            for p in I:
+                    if p.len == p.lr_index + 1:
+                        if p.name == "S'":
+                            # Start symbol. Accept!
+                            st_action['$end'] = 0
+                            st_actionp['$end'] = p
+                        else:
+                            # We are at the end of a production.  Reduce!
+                            if self.lr_method == 'LALR':
+                                laheads = p.lookaheads[st]
+                            else:
+                                laheads = self.grammar.Follow[p.name]
+                            for a in laheads:
+                                actlist.append((a, p, 'reduce using rule %d (%s)' % (p.number, p)))
+                                r = st_action.get(a)
+                                if r is not None:
+                                    # Whoa. Have a shift/reduce or reduce/reduce conflict
+                                    if r > 0:
+                                        # Need to decide on shift or reduce here
+                                        # By default we favor shifting. Need to add
+                                        # some precedence rules here.
+
+                                        # Shift precedence comes from the token
+                                        sprec, slevel = Precedence.get(a, ('right', 0))
+
+                                        # Reduce precedence comes from rule being reduced (p)
+                                        rprec, rlevel = Productions[p.number].prec
+
+                                        if (slevel < rlevel) or ((slevel == rlevel) and (rprec == 'left')):
+                                            # We really need to reduce here.
+                                            st_action[a] = -p.number
+                                            st_actionp[a] = p
+                                            if not slevel and not rlevel:
+                                                log.info('  ! shift/reduce conflict for %s resolved as reduce', a)
+                                                self.sr_conflicts.append((st, a, 'reduce'))
+                                            Productions[p.number].reduced += 1
+                                        elif (slevel == rlevel) and (rprec == 'nonassoc'):
+                                            st_action[a] = None
+                                        else:
+                                            # Hmmm. Guess we'll keep the shift
+                                            if not rlevel:
+                                                log.info('  ! shift/reduce conflict for %s resolved as shift', a)
+                                                self.sr_conflicts.append((st, a, 'shift'))
+                                    elif r < 0:
+                                        # Reduce/reduce conflict.   In this case, we favor the rule
+                                        # that was defined first in the grammar file
+                                        oldp = Productions[-r]
+                                        pp = Productions[p.number]
+                                        if oldp.line > pp.line:
+                                            st_action[a] = -p.number
+                                            st_actionp[a] = p
+                                            chosenp, rejectp = pp, oldp
+                                            Productions[p.number].reduced += 1
+                                            Productions[oldp.number].reduced -= 1
+                                        else:
+                                            chosenp, rejectp = oldp, pp
+                                        self.rr_conflicts.append((st, chosenp, rejectp))
+                                        log.info('  ! reduce/reduce conflict for %s resolved using rule %d (%s)',
+                                                 a, st_actionp[a].number, st_actionp[a])
+                                    else:
+                                        raise LALRError('Unknown conflict in state %d' % st)
+                                else:
+                                    st_action[a] = -p.number
+                                    st_actionp[a] = p
+                                    Productions[p.number].reduced += 1
+                    else:
+                        i = p.lr_index
+                        a = p.prod[i+1]       # Get symbol right after the "."
+                        if a in self.grammar.Terminals:
+                            g = self.lr0_goto(I, a)
+                            j = self.lr0_cidhash.get(id(g), -1)
+                            if j >= 0:
+                                # We are in a shift state
+                                actlist.append((a, p, 'shift and go to state %d' % j))
+                                r = st_action.get(a)
+                                if r is not None:
+                                    # Whoa have a shift/reduce or shift/shift conflict
+                                    if r > 0:
+                                        if r != j:
+                                            raise LALRError('Shift/shift conflict in state %d' % st)
+                                    elif r < 0:
+                                        # Do a precedence check.
+                                        #   -  if precedence of reduce rule is higher, we reduce.
+                                        #   -  if precedence of reduce is same and left assoc, we reduce.
+                                        #   -  otherwise we shift
+
+                                        # Shift precedence comes from the token
+                                        sprec, slevel = Precedence.get(a, ('right', 0))
+
+                                        # Reduce precedence comes from the rule that could have been reduced
+                                        rprec, rlevel = Productions[st_actionp[a].number].prec
+
+                                        if (slevel > rlevel) or ((slevel == rlevel) and (rprec == 'right')):
+                                            # We decide to shift here... highest precedence to shift
+                                            Productions[st_actionp[a].number].reduced -= 1
+                                            st_action[a] = j
+                                            st_actionp[a] = p
+                                            if not rlevel:
+                                                log.info('  ! shift/reduce conflict for %s resolved as shift', a)
+                                                self.sr_conflicts.append((st, a, 'shift'))
+                                        elif (slevel == rlevel) and (rprec == 'nonassoc'):
+                                            st_action[a] = None
+                                        else:
+                                            # Hmmm. Guess we'll keep the reduce
+                                            if not slevel and not rlevel:
+                                                log.info('  ! shift/reduce conflict for %s resolved as reduce', a)
+                                                self.sr_conflicts.append((st, a, 'reduce'))
+
+                                    else:
+                                        raise LALRError('Unknown conflict in state %d' % st)
+                                else:
+                                    st_action[a] = j
+                                    st_actionp[a] = p
+
+            # Print the actions associated with each terminal
+            _actprint = {}
+            for a, p, m in actlist:
+                if a in st_action:
+                    if p is st_actionp[a]:
+                        log.info('    %-15s %s', a, m)
+                        _actprint[(a, m)] = 1
+            log.info('')
+            # Print the actions that were not used. (debugging)
+            not_used = 0
+            for a, p, m in actlist:
+                if a in st_action:
+                    if p is not st_actionp[a]:
+                        if not (a, m) in _actprint:
+                            log.debug('  ! %-15s [ %s ]', a, m)
+                            not_used = 1
+                            _actprint[(a, m)] = 1
+            if not_used:
+                log.debug('')
+
+            # Construct the goto table for this state
+
+            nkeys = {}
+            for ii in I:
+                for s in ii.usyms:
+                    if s in self.grammar.Nonterminals:
+                        nkeys[s] = None
+            for n in nkeys:
+                g = self.lr0_goto(I, n)
+                j = self.lr0_cidhash.get(id(g), -1)
+                if j >= 0:
+                    st_goto[n] = j
+                    log.info('    %-30s shift and go to state %d', n, j)
+
+            action[st] = st_action
+            actionp[st] = st_actionp
+            goto[st] = st_goto
+            st += 1
+
+    # -----------------------------------------------------------------------------
+    # write()
+    #
+    # This function writes the LR parsing tables to a file
+    # -----------------------------------------------------------------------------
+
+    def write_table(self, tabmodule, outputdir='', signature=''):
+        if isinstance(tabmodule, types.ModuleType):
+            raise IOError("Won't overwrite existing tabmodule")
+
+        basemodulename = tabmodule.split('.')[-1]
+        filename = os.path.join(outputdir, basemodulename) + '.py'
+        try:
+            f = open(filename, 'w')
+
+            f.write('''
+# %s
+# This file is automatically generated. Do not edit.
+# pylint: disable=W,C,R
+_tabversion = %r
+
+_lr_method = %r
+
+_lr_signature = %r
+    ''' % (os.path.basename(filename), __tabversion__, self.lr_method, signature))
+
+            # Change smaller to 0 to go back to original tables
+            smaller = 1
+
+            # Factor out names to try and make smaller
+            if smaller:
+                items = {}
+
+                for s, nd in self.lr_action.items():
+                    for name, v in nd.items():
+                        i = items.get(name)
+                        if not i:
+                            i = ([], [])
+                            items[name] = i
+                        i[0].append(s)
+                        i[1].append(v)
+
+                f.write('\n_lr_action_items = {')
+                for k, v in items.items():
+                    f.write('%r:([' % k)
+                    for i in v[0]:
+                        f.write('%r,' % i)
+                    f.write('],[')
+                    for i in v[1]:
+                        f.write('%r,' % i)
+
+                    f.write(']),')
+                f.write('}\n')
+
+                f.write('''
+_lr_action = {}
+for _k, _v in _lr_action_items.items():
+   for _x,_y in zip(_v[0],_v[1]):
+      if not _x in _lr_action:  _lr_action[_x] = {}
+      _lr_action[_x][_k] = _y
+del _lr_action_items
+''')
+
+            else:
+                f.write('\n_lr_action = { ')
+                for k, v in self.lr_action.items():
+                    f.write('(%r,%r):%r,' % (k[0], k[1], v))
+                f.write('}\n')
+
+            if smaller:
+                # Factor out names to try and make smaller
+                items = {}
+
+                for s, nd in self.lr_goto.items():
+                    for name, v in nd.items():
+                        i = items.get(name)
+                        if not i:
+                            i = ([], [])
+                            items[name] = i
+                        i[0].append(s)
+                        i[1].append(v)
+
+                f.write('\n_lr_goto_items = {')
+                for k, v in items.items():
+                    f.write('%r:([' % k)
+                    for i in v[0]:
+                        f.write('%r,' % i)
+                    f.write('],[')
+                    for i in v[1]:
+                        f.write('%r,' % i)
+
+                    f.write(']),')
+                f.write('}\n')
+
+                f.write('''
+_lr_goto = {}
+for _k, _v in _lr_goto_items.items():
+   for _x, _y in zip(_v[0], _v[1]):
+       if not _x in _lr_goto: _lr_goto[_x] = {}
+       _lr_goto[_x][_k] = _y
+del _lr_goto_items
+''')
+            else:
+                f.write('\n_lr_goto = { ')
+                for k, v in self.lr_goto.items():
+                    f.write('(%r,%r):%r,' % (k[0], k[1], v))
+                f.write('}\n')
+
+            # Write production table
+            f.write('_lr_productions = [\n')
+            for p in self.lr_productions:
+                if p.func:
+                    f.write('  (%r,%r,%d,%r,%r,%d),\n' % (p.str, p.name, p.len,
+                                                          p.func, os.path.basename(p.file), p.line))
+                else:
+                    f.write('  (%r,%r,%d,None,None,None),\n' % (str(p), p.name, p.len))
+            f.write(']\n')
+            f.close()
+
+        except IOError as e:
+            raise
+
+
+    # -----------------------------------------------------------------------------
+    # pickle_table()
+    #
+    # This function pickles the LR parsing tables to a supplied file object
+    # -----------------------------------------------------------------------------
+
+    def pickle_table(self, filename, signature=''):
+        try:
+            import cPickle as pickle
+        except ImportError:
+            import pickle
+        with open(filename, 'wb') as outf:
+            pickle.dump(__tabversion__, outf, pickle_protocol)
+            pickle.dump(self.lr_method, outf, pickle_protocol)
+            pickle.dump(signature, outf, pickle_protocol)
+            pickle.dump(self.lr_action, outf, pickle_protocol)
+            pickle.dump(self.lr_goto, outf, pickle_protocol)
+
+            outp = []
+            for p in self.lr_productions:
+                if p.func:
+                    outp.append((p.str, p.name, p.len, p.func, os.path.basename(p.file), p.line))
+                else:
+                    outp.append((str(p), p.name, p.len, None, None, None))
+            pickle.dump(outp, outf, pickle_protocol)
+
+# -----------------------------------------------------------------------------
+#                            === INTROSPECTION ===
+#
+# The following functions and classes are used to implement the PLY
+# introspection features followed by the yacc() function itself.
+# -----------------------------------------------------------------------------
+
+# -----------------------------------------------------------------------------
+# get_caller_module_dict()
+#
+# This function returns a dictionary containing all of the symbols defined within
+# a caller further down the call stack.  This is used to get the environment
+# associated with the yacc() call if none was provided.
+# -----------------------------------------------------------------------------
+
+def get_caller_module_dict(levels):
+    f = sys._getframe(levels)
+    ldict = f.f_globals.copy()
+    if f.f_globals != f.f_locals:
+        ldict.update(f.f_locals)
+    return ldict
+
+# -----------------------------------------------------------------------------
+# parse_grammar()
+#
+# This takes a raw grammar rule string and parses it into production data
+# -----------------------------------------------------------------------------
+def parse_grammar(doc, file, line):
+    grammar = []
+    # Split the doc string into lines
+    pstrings = doc.splitlines()
+    lastp = None
+    dline = line
+    for ps in pstrings:
+        dline += 1
+        p = ps.split()
+        if not p:
+            continue
+        try:
+            if p[0] == '|':
+                # This is a continuation of a previous rule
+                if not lastp:
+                    raise SyntaxError("%s:%d: Misplaced '|'" % (file, dline))
+                prodname = lastp
+                syms = p[1:]
+            else:
+                prodname = p[0]
+                lastp = prodname
+                syms   = p[2:]
+                assign = p[1]
+                if assign != ':' and assign != '::=':
+                    raise SyntaxError("%s:%d: Syntax error. Expected ':'" % (file, dline))
+
+            grammar.append((file, dline, prodname, syms))
+        except SyntaxError:
+            raise
+        except Exception:
+            raise SyntaxError('%s:%d: Syntax error in rule %r' % (file, dline, ps.strip()))
+
+    return grammar
+
+# -----------------------------------------------------------------------------
+# ParserReflect()
+#
+# This class represents information extracted for building a parser including
+# start symbol, error function, tokens, precedence list, action functions,
+# etc.
+# -----------------------------------------------------------------------------
+class ParserReflect(object):
+    def __init__(self, pdict, log=None):
+        self.pdict      = pdict
+        self.start      = None
+        self.error_func = None
+        self.tokens     = None
+        self.modules    = set()
+        self.grammar    = []
+        self.error      = False
+
+        if log is None:
+            self.log = PlyLogger(sys.stderr)
+        else:
+            self.log = log
+
+    # Get all of the basic information
+    def get_all(self):
+        self.get_start()
+        self.get_error_func()
+        self.get_tokens()
+        self.get_precedence()
+        self.get_pfunctions()
+
+    # Validate all of the information
+    def validate_all(self):
+        self.validate_start()
+        self.validate_error_func()
+        self.validate_tokens()
+        self.validate_precedence()
+        self.validate_pfunctions()
+        self.validate_modules()
+        return self.error
+
+    # Compute a signature over the grammar
+    def signature(self):
+        parts = []
+        try:
+            if self.start:
+                parts.append(self.start)
+            if self.prec:
+                parts.append(''.join([''.join(p) for p in self.prec]))
+            if self.tokens:
+                parts.append(' '.join(self.tokens))
+            for f in self.pfuncs:
+                if f[3]:
+                    parts.append(f[3])
+        except (TypeError, ValueError):
+            pass
+        return ''.join(parts)
+
+    # -----------------------------------------------------------------------------
+    # validate_modules()
+    #
+    # This method checks to see if there are duplicated p_rulename() functions
+    # in the parser module file.  Without this function, it is really easy for
+    # users to make mistakes by cutting and pasting code fragments (and it's a real
+    # bugger to try and figure out why the resulting parser doesn't work).  Therefore,
+    # we just do a little regular expression pattern matching of def statements
+    # to try and detect duplicates.
+    # -----------------------------------------------------------------------------
+
+    def validate_modules(self):
+        # Match def p_funcname(
+        fre = re.compile(r'\s*def\s+(p_[a-zA-Z_0-9]*)\(')
+
+        for module in self.modules:
+            try:
+                lines, linen = inspect.getsourcelines(module)
+            except IOError:
+                continue
+
+            counthash = {}
+            for linen, line in enumerate(lines):
+                linen += 1
+                m = fre.match(line)
+                if m:
+                    name = m.group(1)
+                    prev = counthash.get(name)
+                    if not prev:
+                        counthash[name] = linen
+                    else:
+                        filename = inspect.getsourcefile(module)
+                        self.log.warning('%s:%d: Function %s redefined. Previously defined on line %d',
+                                         filename, linen, name, prev)
+
+    # Get the start symbol
+    def get_start(self):
+        self.start = self.pdict.get('start')
+
+    # Validate the start symbol
+    def validate_start(self):
+        if self.start is not None:
+            if not isinstance(self.start, string_types):
+                self.log.error("'start' must be a string")
+
+    # Look for error handler
+    def get_error_func(self):
+        self.error_func = self.pdict.get('p_error')
+
+    # Validate the error function
+    def validate_error_func(self):
+        if self.error_func:
+            if isinstance(self.error_func, types.FunctionType):
+                ismethod = 0
+            elif isinstance(self.error_func, types.MethodType):
+                ismethod = 1
+            else:
+                self.log.error("'p_error' defined, but is not a function or method")
+                self.error = True
+                return
+
+            eline = self.error_func.__code__.co_firstlineno
+            efile = self.error_func.__code__.co_filename
+            module = inspect.getmodule(self.error_func)
+            self.modules.add(module)
+
+            argcount = self.error_func.__code__.co_argcount - ismethod
+            if argcount != 1:
+                self.log.error('%s:%d: p_error() requires 1 argument', efile, eline)
+                self.error = True
+
+    # Get the tokens map
+    def get_tokens(self):
+        tokens = self.pdict.get('tokens')
+        if not tokens:
+            self.log.error('No token list is defined')
+            self.error = True
+            return
+
+        if not isinstance(tokens, (list, tuple)):
+            self.log.error('tokens must be a list or tuple')
+            self.error = True
+            return
+
+        if not tokens:
+            self.log.error('tokens is empty')
+            self.error = True
+            return
+
+        self.tokens = sorted(tokens)
+
+    # Validate the tokens
+    def validate_tokens(self):
+        # Validate the tokens.
+        if 'error' in self.tokens:
+            self.log.error("Illegal token name 'error'. Is a reserved word")
+            self.error = True
+            return
+
+        terminals = set()
+        for n in self.tokens:
+            if n in terminals:
+                self.log.warning('Token %r multiply defined', n)
+            terminals.add(n)
+
+    # Get the precedence map (if any)
+    def get_precedence(self):
+        self.prec = self.pdict.get('precedence')
+
+    # Validate and parse the precedence map
+    def validate_precedence(self):
+        preclist = []
+        if self.prec:
+            if not isinstance(self.prec, (list, tuple)):
+                self.log.error('precedence must be a list or tuple')
+                self.error = True
+                return
+            for level, p in enumerate(self.prec):
+                if not isinstance(p, (list, tuple)):
+                    self.log.error('Bad precedence table')
+                    self.error = True
+                    return
+
+                if len(p) < 2:
+                    self.log.error('Malformed precedence entry %s. Must be (assoc, term, ..., term)', p)
+                    self.error = True
+                    return
+                assoc = p[0]
+                if not isinstance(assoc, string_types):
+                    self.log.error('precedence associativity must be a string')
+                    self.error = True
+                    return
+                for term in p[1:]:
+                    if not isinstance(term, string_types):
+                        self.log.error('precedence items must be strings')
+                        self.error = True
+                        return
+                    preclist.append((term, assoc, level+1))
+        self.preclist = preclist
+
+    # Get all p_functions from the grammar
+    def get_pfunctions(self):
+        p_functions = []
+        for name, item in self.pdict.items():
+            if not name.startswith('p_') or name == 'p_error':
+                continue
+            if isinstance(item, (types.FunctionType, types.MethodType)):
+                line = getattr(item, 'co_firstlineno', item.__code__.co_firstlineno)
+                module = inspect.getmodule(item)
+                p_functions.append((line, module, name, item.__doc__))
+
+        # Sort all of the actions by line number; make sure to stringify
+        # modules to make them sortable, since `line` may not uniquely sort all
+        # p functions
+        p_functions.sort(key=lambda p_function: (
+            p_function[0],
+            str(p_function[1]),
+            p_function[2],
+            p_function[3]))
+        self.pfuncs = p_functions
+
+    # Validate all of the p_functions
+    def validate_pfunctions(self):
+        grammar = []
+        # Check for non-empty symbols
+        if len(self.pfuncs) == 0:
+            self.log.error('no rules of the form p_rulename are defined')
+            self.error = True
+            return
+
+        for line, module, name, doc in self.pfuncs:
+            file = inspect.getsourcefile(module)
+            func = self.pdict[name]
+            if isinstance(func, types.MethodType):
+                reqargs = 2
+            else:
+                reqargs = 1
+            if func.__code__.co_argcount > reqargs:
+                self.log.error('%s:%d: Rule %r has too many arguments', file, line, func.__name__)
+                self.error = True
+            elif func.__code__.co_argcount < reqargs:
+                self.log.error('%s:%d: Rule %r requires an argument', file, line, func.__name__)
+                self.error = True
+            elif not func.__doc__:
+                self.log.warning('%s:%d: No documentation string specified in function %r (ignored)',
+                                 file, line, func.__name__)
+            else:
+                try:
+                    parsed_g = parse_grammar(doc, file, line)
+                    for g in parsed_g:
+                        grammar.append((name, g))
+                except SyntaxError as e:
+                    self.log.error(str(e))
+                    self.error = True
+
+                # Looks like a valid grammar rule
+                # Mark the file in which defined.
+                self.modules.add(module)
+
+        # Secondary validation step that looks for p_ definitions that are not functions
+        # or functions that look like they might be grammar rules.
+
+        for n, v in self.pdict.items():
+            if n.startswith('p_') and isinstance(v, (types.FunctionType, types.MethodType)):
+                continue
+            if n.startswith('t_'):
+                continue
+            if n.startswith('p_') and n != 'p_error':
+                self.log.warning('%r not defined as a function', n)
+            if ((isinstance(v, types.FunctionType) and v.__code__.co_argcount == 1) or
+                   (isinstance(v, types.MethodType) and v.__func__.__code__.co_argcount == 2)):
+                if v.__doc__:
+                    try:
+                        doc = v.__doc__.split(' ')
+                        if doc[1] == ':':
+                            self.log.warning('%s:%d: Possible grammar rule %r defined without p_ prefix',
+                                             v.__code__.co_filename, v.__code__.co_firstlineno, n)
+                    except IndexError:
+                        pass
+
+        self.grammar = grammar
+
+# -----------------------------------------------------------------------------
+# yacc(module)
+#
+# Build a parser
+# -----------------------------------------------------------------------------
+
+def yacc(method='LALR', debug=yaccdebug, module=None, tabmodule=tab_module, start=None,
+         check_recursion=True, optimize=False, write_tables=True, debugfile=debug_file,
+         outputdir=None, debuglog=None, errorlog=None, picklefile=None):
+
+    if tabmodule is None:
+        tabmodule = tab_module
+
+    # Reference to the parsing method of the last built parser
+    global parse
+
+    # If pickling is enabled, table files are not created
+    if picklefile:
+        write_tables = 0
+
+    if errorlog is None:
+        errorlog = PlyLogger(sys.stderr)
+
+    # Get the module dictionary used for the parser
+    if module:
+        _items = [(k, getattr(module, k)) for k in dir(module)]
+        pdict = dict(_items)
+        # If no __file__ or __package__ attributes are available, try to obtain them
+        # from the __module__ instead
+        if '__file__' not in pdict:
+            pdict['__file__'] = sys.modules[pdict['__module__']].__file__
+        if '__package__' not in pdict and '__module__' in pdict:
+            if hasattr(sys.modules[pdict['__module__']], '__package__'):
+                pdict['__package__'] = sys.modules[pdict['__module__']].__package__
+    else:
+        pdict = get_caller_module_dict(2)
+
+    if outputdir is None:
+        # If no output directory is set, the location of the output files
+        # is determined according to the following rules:
+        #     - If tabmodule specifies a package, files go into that package directory
+        #     - Otherwise, files go in the same directory as the specifying module
+        if isinstance(tabmodule, types.ModuleType):
+            srcfile = tabmodule.__file__
+        else:
+            if '.' not in tabmodule:
+                srcfile = pdict['__file__']
+            else:
+                parts = tabmodule.split('.')
+                pkgname = '.'.join(parts[:-1])
+                exec('import %s' % pkgname)
+                srcfile = getattr(sys.modules[pkgname], '__file__', '')
+        outputdir = os.path.dirname(srcfile)
+
+    # Determine if the module is package of a package or not.
+    # If so, fix the tabmodule setting so that tables load correctly
+    pkg = pdict.get('__package__')
+    if pkg and isinstance(tabmodule, str):
+        if '.' not in tabmodule:
+            tabmodule = pkg + '.' + tabmodule
+
+
+
+    # Set start symbol if it's specified directly using an argument
+    if start is not None:
+        pdict['start'] = start
+
+    # Collect parser information from the dictionary
+    pinfo = ParserReflect(pdict, log=errorlog)
+    pinfo.get_all()
+
+    if pinfo.error:
+        raise YaccError('Unable to build parser')
+
+    # Check signature against table files (if any)
+    signature = pinfo.signature()
+
+    # Read the tables
+    try:
+        lr = LRTable()
+        if picklefile:
+            read_signature = lr.read_pickle(picklefile)
+        else:
+            read_signature = lr.read_table(tabmodule)
+        if optimize or (read_signature == signature):
+            try:
+                lr.bind_callables(pinfo.pdict)
+                parser = LRParser(lr, pinfo.error_func)
+                parse = parser.parse
+                return parser
+            except Exception as e:
+                errorlog.warning('There was a problem loading the table file: %r', e)
+    except VersionError as e:
+        errorlog.warning(str(e))
+    except ImportError:
+        pass
+
+    if debuglog is None:
+        if debug:
+            try:
+                debuglog = PlyLogger(open(os.path.join(outputdir, debugfile), 'w'))
+            except IOError as e:
+                errorlog.warning("Couldn't open %r. %s" % (debugfile, e))
+                debuglog = NullLogger()
+        else:
+            debuglog = NullLogger()
+
+    debuglog.info('Created by PLY version %s (http://www.dabeaz.com/ply)', __version__)
+
+    errors = False
+
+    # Validate the parser information
+    if pinfo.validate_all():
+        raise YaccError('Unable to build parser')
+
+    if not pinfo.error_func:
+        errorlog.warning('no p_error() function is defined')
+
+    # Create a grammar object
+    grammar = Grammar(pinfo.tokens)
+
+    # Set precedence level for terminals
+    for term, assoc, level in pinfo.preclist:
+        try:
+            grammar.set_precedence(term, assoc, level)
+        except GrammarError as e:
+            errorlog.warning('%s', e)
+
+    # Add productions to the grammar
+    for funcname, gram in pinfo.grammar:
+        file, line, prodname, syms = gram
+        try:
+            grammar.add_production(prodname, syms, funcname, file, line)
+        except GrammarError as e:
+            errorlog.error('%s', e)
+            errors = True
+
+    # Set the grammar start symbols
+    try:
+        if start is None:
+            grammar.set_start(pinfo.start)
+        else:
+            grammar.set_start(start)
+    except GrammarError as e:
+        errorlog.error(str(e))
+        errors = True
+
+    if errors:
+        raise YaccError('Unable to build parser')
+
+    # Verify the grammar structure
+    undefined_symbols = grammar.undefined_symbols()
+    for sym, prod in undefined_symbols:
+        errorlog.error('%s:%d: Symbol %r used, but not defined as a token or a rule', prod.file, prod.line, sym)
+        errors = True
+
+    unused_terminals = grammar.unused_terminals()
+    if unused_terminals:
+        debuglog.info('')
+        debuglog.info('Unused terminals:')
+        debuglog.info('')
+        for term in unused_terminals:
+            errorlog.warning('Token %r defined, but not used', term)
+            debuglog.info('    %s', term)
+
+    # Print out all productions to the debug log
+    if debug:
+        debuglog.info('')
+        debuglog.info('Grammar')
+        debuglog.info('')
+        for n, p in enumerate(grammar.Productions):
+            debuglog.info('Rule %-5d %s', n, p)
+
+    # Find unused non-terminals
+    unused_rules = grammar.unused_rules()
+    for prod in unused_rules:
+        errorlog.warning('%s:%d: Rule %r defined, but not used', prod.file, prod.line, prod.name)
+
+    if len(unused_terminals) == 1:
+        errorlog.warning('There is 1 unused token')
+    if len(unused_terminals) > 1:
+        errorlog.warning('There are %d unused tokens', len(unused_terminals))
+
+    if len(unused_rules) == 1:
+        errorlog.warning('There is 1 unused rule')
+    if len(unused_rules) > 1:
+        errorlog.warning('There are %d unused rules', len(unused_rules))
+
+    if debug:
+        debuglog.info('')
+        debuglog.info('Terminals, with rules where they appear')
+        debuglog.info('')
+        terms = list(grammar.Terminals)
+        terms.sort()
+        for term in terms:
+            debuglog.info('%-20s : %s', term, ' '.join([str(s) for s in grammar.Terminals[term]]))
+
+        debuglog.info('')
+        debuglog.info('Nonterminals, with rules where they appear')
+        debuglog.info('')
+        nonterms = list(grammar.Nonterminals)
+        nonterms.sort()
+        for nonterm in nonterms:
+            debuglog.info('%-20s : %s', nonterm, ' '.join([str(s) for s in grammar.Nonterminals[nonterm]]))
+        debuglog.info('')
+
+    if check_recursion:
+        unreachable = grammar.find_unreachable()
+        for u in unreachable:
+            errorlog.warning('Symbol %r is unreachable', u)
+
+        infinite = grammar.infinite_cycles()
+        for inf in infinite:
+            errorlog.error('Infinite recursion detected for symbol %r', inf)
+            errors = True
+
+    unused_prec = grammar.unused_precedence()
+    for term, assoc in unused_prec:
+        errorlog.error('Precedence rule %r defined for unknown symbol %r', assoc, term)
+        errors = True
+
+    if errors:
+        raise YaccError('Unable to build parser')
+
+    # Run the LRGeneratedTable on the grammar
+    if debug:
+        errorlog.debug('Generating %s tables', method)
+
+    lr = LRGeneratedTable(grammar, method, debuglog)
+
+    if debug:
+        num_sr = len(lr.sr_conflicts)
+
+        # Report shift/reduce and reduce/reduce conflicts
+        if num_sr == 1:
+            errorlog.warning('1 shift/reduce conflict')
+        elif num_sr > 1:
+            errorlog.warning('%d shift/reduce conflicts', num_sr)
+
+        num_rr = len(lr.rr_conflicts)
+        if num_rr == 1:
+            errorlog.warning('1 reduce/reduce conflict')
+        elif num_rr > 1:
+            errorlog.warning('%d reduce/reduce conflicts', num_rr)
+
+    # Write out conflicts to the output file
+    if debug and (lr.sr_conflicts or lr.rr_conflicts):
+        debuglog.warning('')
+        debuglog.warning('Conflicts:')
+        debuglog.warning('')
+
+        for state, tok, resolution in lr.sr_conflicts:
+            debuglog.warning('shift/reduce conflict for %s in state %d resolved as %s',  tok, state, resolution)
+
+        already_reported = set()
+        for state, rule, rejected in lr.rr_conflicts:
+            if (state, id(rule), id(rejected)) in already_reported:
+                continue
+            debuglog.warning('reduce/reduce conflict in state %d resolved using rule (%s)', state, rule)
+            debuglog.warning('rejected rule (%s) in state %d', rejected, state)
+            errorlog.warning('reduce/reduce conflict in state %d resolved using rule (%s)', state, rule)
+            errorlog.warning('rejected rule (%s) in state %d', rejected, state)
+            already_reported.add((state, id(rule), id(rejected)))
+
+        warned_never = []
+        for state, rule, rejected in lr.rr_conflicts:
+            if not rejected.reduced and (rejected not in warned_never):
+                debuglog.warning('Rule (%s) is never reduced', rejected)
+                errorlog.warning('Rule (%s) is never reduced', rejected)
+                warned_never.append(rejected)
+
+    # Write the table file if requested
+    if write_tables:
+        try:
+            lr.write_table(tabmodule, outputdir, signature)
+            if tabmodule in sys.modules:
+                del sys.modules[tabmodule]
+        except IOError as e:
+            errorlog.warning("Couldn't create %r. %s" % (tabmodule, e))
+
+    # Write a pickled version of the tables
+    if picklefile:
+        try:
+            lr.pickle_table(picklefile, signature)
+        except IOError as e:
+            errorlog.warning("Couldn't create %r. %s" % (picklefile, e))
+
+    # Build the parser
+    lr.bind_callables(pinfo.pdict)
+    parser = LRParser(lr, pinfo.error_func)
+
+    parse = parser.parse
+    return parser
diff --git a/venv/lib/python3.9/site-packages/ply/ygen.py b/venv/lib/python3.9/site-packages/ply/ygen.py
new file mode 100644
index 0000000..03b9318
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/ply/ygen.py
@@ -0,0 +1,69 @@
+# ply: ygen.py
+#
+# This is a support program that auto-generates different versions of the YACC parsing
+# function with different features removed for the purposes of performance.
+#
+# Users should edit the method LRParser.parsedebug() in yacc.py.   The source code
+# for that method is then used to create the other methods.   See the comments in
+# yacc.py for further details.
+
+import os.path
+import shutil
+
+def get_source_range(lines, tag):
+    srclines = enumerate(lines)
+    start_tag = '#--! %s-start' % tag
+    end_tag = '#--! %s-end' % tag
+
+    for start_index, line in srclines:
+        if line.strip().startswith(start_tag):
+            break
+
+    for end_index, line in srclines:
+        if line.strip().endswith(end_tag):
+            break
+
+    return (start_index + 1, end_index)
+
+def filter_section(lines, tag):
+    filtered_lines = []
+    include = True
+    tag_text = '#--! %s' % tag
+    for line in lines:
+        if line.strip().startswith(tag_text):
+            include = not include
+        elif include:
+            filtered_lines.append(line)
+    return filtered_lines
+
+def main():
+    dirname = os.path.dirname(__file__)
+    shutil.copy2(os.path.join(dirname, 'yacc.py'), os.path.join(dirname, 'yacc.py.bak'))
+    with open(os.path.join(dirname, 'yacc.py'), 'r') as f:
+        lines = f.readlines()
+
+    parse_start, parse_end = get_source_range(lines, 'parsedebug')
+    parseopt_start, parseopt_end = get_source_range(lines, 'parseopt')
+    parseopt_notrack_start, parseopt_notrack_end = get_source_range(lines, 'parseopt-notrack')
+
+    # Get the original source
+    orig_lines = lines[parse_start:parse_end]
+
+    # Filter the DEBUG sections out
+    parseopt_lines = filter_section(orig_lines, 'DEBUG')
+
+    # Filter the TRACKING sections out
+    parseopt_notrack_lines = filter_section(parseopt_lines, 'TRACKING')
+
+    # Replace the parser source sections with updated versions
+    lines[parseopt_notrack_start:parseopt_notrack_end] = parseopt_notrack_lines
+    lines[parseopt_start:parseopt_end] = parseopt_lines
+
+    lines = [line.rstrip()+'\n' for line in lines]
+    with open(os.path.join(dirname, 'yacc.py'), 'w') as f:
+        f.writelines(lines)
+
+    print('Updated yacc.py')
+
+if __name__ == '__main__':
+    main()
diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/PKG-INFO b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/PKG-INFO
new file mode 100644
index 0000000..daf7fa9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/PKG-INFO
@@ -0,0 +1,494 @@
+Metadata-Version: 2.1
+Name: pyverilog
+Version: 1.3.0
+Summary: Python-based Hardware Design Processing Toolkit for Verilog HDL: Parser, Dataflow Analyzer, Controlflow Analyzer and Code Generator
+Home-page: https://github.com/PyHDI/Pyverilog
+Author: Shinya Takamaeda-Yamazaki
+License: Apache License 2.0
+Description: Pyverilog
+        ==============================
+        
+        [![Build Status](https://travis-ci.org/PyHDI/Pyverilog.svg)](https://travis-ci.org/PyHDI/Pyverilog)
+        
+        Python-based Hardware Design Processing Toolkit for Verilog HDL
+        
+        Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+        
+        
+        License
+        ==============================
+        
+        Apache License 2.0 (http://www.apache.org/licenses/LICENSE-2.0)
+        
+        
+        Publication
+        ==============================
+        
+        If you use Pyverilog in your research, please cite the following paper.
+        
+        - Shinya Takamaeda-Yamazaki: Pyverilog: A Python-based Hardware Design Processing Toolkit for Verilog HDL, 11th International Symposium on Applied Reconfigurable Computing (ARC 2015) (Poster), Lecture Notes in Computer Science, Vol.9040/2015, pp.451-460, April 2015.
+        [Paper](http://link.springer.com/chapter/10.1007/978-3-319-16214-0_42)
+        
+        ```
+        @inproceedings{Takamaeda:2015:ARC:Pyverilog,
+        title={Pyverilog: A Python-Based Hardware Design Processing Toolkit for Verilog HDL},
+        author={Takamaeda-Yamazaki, Shinya},
+        booktitle={Applied Reconfigurable Computing},
+        month={Apr},
+        year={2015},
+        pages={451-460},
+        volume={9040},
+        series={Lecture Notes in Computer Science},
+        publisher={Springer International Publishing},
+        doi={10.1007/978-3-319-16214-0_42},
+        url={http://dx.doi.org/10.1007/978-3-319-16214-0_42},
+        }
+        ```
+        
+        
+        What's Pyverilog?
+        ==============================
+        
+        Pyverilog is an open-source hardware design processing toolkit for Verilog HDL. All source codes are written in Python.
+        
+        Pyverilog includes **(1) code parser, (2) dataflow analyzer, (3) control-flow analyzer and (4) code generator**.
+        You can create your own design analyzer, code translator and code generator of Verilog HDL based on this toolkit.
+        
+        
+        Contribute to Pyverilog
+        ==============================
+        
+        Pyverilog project always welcomes questions, bug reports, feature proposals, and pull requests on [GitHub](https://github.com/PyHDI/Pyverilog).
+        
+        for questions, bug reports, and feature proposals
+        --------------------
+        
+        Please leave your comment on the [issue tracker](https://github.com/PyHDI/Pyverilog/issues) on GitHub.
+        
+        for pull requests
+        --------------------
+        
+        Please check "CONTRIBUTORS.md" for the contributors who provided pull requests.
+        
+        Pyverilog uses **pytest** for the integration testing. **When you send a pull request, please include a testing example with pytest.**
+        To write a testing code, please refer the existing testing examples in "tests" directory.
+        
+        If the pull request code passes all the tests successfully and has no obvious problem, it will be merged to the *develop* branch by the main committers.
+        
+        
+        Installation
+        ==============================
+        
+        Requirements
+        --------------------
+        
+        - Python3: 3.7 or later
+        - Icarus Verilog: 10.1 or later
+        
+        ```
+        sudo apt install iverilog
+        ```
+        
+        - Jinja2: 2.10 or later
+        - PLY: 3.4 or later
+        
+        ```
+        pip3 install jinja2 ply
+        ```
+        
+        Optional installation for testing
+        --------------------
+        
+        These are required for automatic testing of **tests**.
+        We recommend to install these testing library to verify experimental features.
+        
+        - pytest: 3.8.1 or later
+        - pytest-pythonpath: 0.7.3 or later
+        
+        ```
+        pip3 install pytest pytest-pythonpath
+        ```
+        
+        Optional installation for visualization
+        --------------------
+        
+        These are required for graph visualization by dataflow/graphgen.py and controlflow/controlflow_analyzer.py.
+        
+        - Graphviz: 2.38.0 or later
+        - Pygraphviz: 1.3.1 or later
+        
+        ```
+        sudo apt install graphviz
+        pip3 install pygraphviz
+        ```
+        
+        Install
+        --------------------
+        
+        Now you can install Pyverilog using setup.py script:
+        
+        ```
+        python3 setup.py install
+        ```
+        
+        
+        Tools
+        ==============================
+        
+        This software includes various tools for Verilog HDL design.
+        
+        * vparser: Code parser to generate AST (Abstract Syntax Tree) from source codes of Verilog HDL.
+        * dataflow: Dataflow analyzer with an optimizer to remove redundant expressions and some dataflow handling tools.
+        * controlflow: Control-flow analyzer with condition analyzer that identify when a signal is activated.
+        * ast\_code\_generator: Verilog HDL code generator from AST.
+        
+        
+        Getting Started
+        ==============================
+        
+        First, please prepare a Verilog HDL source file as below. The file name is 'test.v'.
+        This sample design adds the input value internally whtn the enable signal is asserted. Then is outputs its partial value to the LED.
+        
+        ```verilog
+        module top
+          (
+           input CLK, 
+           input RST,
+           input enable,
+           input [31:0] value,
+           output [7:0] led
+          );
+          reg [31:0] count;
+          reg [7:0] state;
+          assign led = count[23:16];
+          always @(posedge CLK) begin
+            if(RST) begin
+              count <= 0;
+              state <= 0;
+            end else begin
+              if(state == 0) begin
+                if(enable) state <= 1;
+              end else if(state == 1) begin
+                state <= 2;
+              end else if(state == 2) begin
+                count <= count + value;
+                state <= 0;
+              end
+            end
+          end
+        endmodule
+        ```
+        
+        Code parser
+        ------------------------------
+        
+        Let's try syntax analysis. Please type the command as below.
+        
+        ```
+        python3 pyverilog/examples/example_parser.py test.v
+        ```
+        
+        Then you got the result as below. The result of syntax analysis is displayed.
+        
+        ```
+        Source:  (at 1)
+          Description:  (at 1)
+            ModuleDef: top (at 1)
+              Paramlist:  (at 0)
+              Portlist:  (at 2)
+                Ioport:  (at 3)
+                  Input: CLK, False (at 3)
+                Ioport:  (at 4)
+                  Input: RST, False (at 4)
+                Ioport:  (at 5)
+                  Input: enable, False (at 5)
+                Ioport:  (at 6)
+                  Input: value, False (at 6)
+                    Width:  (at 6)
+                      IntConst: 31 (at 6)
+                      IntConst: 0 (at 6)
+                Ioport:  (at 7)
+                  Output: led, False (at 7)
+                    Width:  (at 7)
+                      IntConst: 7 (at 7)
+                      IntConst: 0 (at 7)
+              Decl:  (at 9)
+                Reg: count, False (at 9)
+                  Width:  (at 9)
+                    IntConst: 31 (at 9)
+                    IntConst: 0 (at 9)
+              Decl:  (at 10)
+                Reg: state, False (at 10)
+                  Width:  (at 10)
+                    IntConst: 7 (at 10)
+                    IntConst: 0 (at 10)
+              Assign:  (at 11)
+                Lvalue:  (at 11)
+                  Identifier: led (at 11)
+                Rvalue:  (at 11)
+                  Partselect:  (at 11)
+                    Identifier: count (at 11)
+                    IntConst: 23 (at 11)
+                    IntConst: 16 (at 11)
+              Always:  (at 12)
+                SensList:  (at 12)
+                  Sens: posedge (at 12)
+                    Identifier: CLK (at 12)
+                Block: None (at 12)
+                  IfStatement:  (at 13)
+                    Identifier: RST (at 13)
+                    Block: None (at 13)
+                      NonblockingSubstitution:  (at 14)
+                        Lvalue:  (at 14)
+                          Identifier: count (at 14)
+                        Rvalue:  (at 14)
+                          IntConst: 0 (at 14)
+                      NonblockingSubstitution:  (at 15)
+                        Lvalue:  (at 15)
+                          Identifier: state (at 15)
+                        Rvalue:  (at 15)
+                          IntConst: 0 (at 15)
+                    Block: None (at 16)
+                      IfStatement:  (at 17)
+                        Eq:  (at 17)
+                          Identifier: state (at 17)
+                          IntConst: 0 (at 17)
+                        Block: None (at 17)
+                          IfStatement:  (at 18)
+                            Identifier: enable (at 18)
+                            NonblockingSubstitution:  (at 18)
+                              Lvalue:  (at 18)
+                                Identifier: state (at 18)
+                              Rvalue:  (at 18)
+                                IntConst: 1 (at 18)
+                        IfStatement:  (at 19)
+                          Eq:  (at 19)
+                            Identifier: state (at 19)
+                            IntConst: 1 (at 19)
+                          Block: None (at 19)
+                            NonblockingSubstitution:  (at 20)
+                              Lvalue:  (at 20)
+                                Identifier: state (at 20)
+                              Rvalue:  (at 20)
+                                IntConst: 2 (at 20)
+                          IfStatement:  (at 21)
+                            Eq:  (at 21)
+                              Identifier: state (at 21)
+                              IntConst: 2 (at 21)
+                            Block: None (at 21)
+                              NonblockingSubstitution:  (at 22)
+                                Lvalue:  (at 22)
+                                  Identifier: count (at 22)
+                                Rvalue:  (at 22)
+                                  Plus:  (at 22)
+                                    Identifier: count (at 22)
+                                    Identifier: value (at 22)
+                              NonblockingSubstitution:  (at 23)
+                                Lvalue:  (at 23)
+                                  Identifier: state (at 23)
+                                Rvalue:  (at 23)
+                                  IntConst: 0 (at 23)
+        ```
+        
+        Dataflow analyzer
+        ------------------------------
+        
+        Let's try dataflow analysis. Please type the command as below.
+        
+        ```
+        python3 pyverilog/examples/example_dataflow_analyzer.py -t top test.v 
+        ```
+        
+        Then you got the result as below. The result of each signal definition and each signal assignment are displayed.
+        
+        ```
+        Directive:
+        Instance:
+        (top, 'top')
+        Term:
+        (Term name:top.led type:{'Output'} msb:(IntConst 7) lsb:(IntConst 0))
+        (Term name:top.enable type:{'Input'} msb:(IntConst 0) lsb:(IntConst 0))
+        (Term name:top.CLK type:{'Input'} msb:(IntConst 0) lsb:(IntConst 0))
+        (Term name:top.count type:{'Reg'} msb:(IntConst 31) lsb:(IntConst 0))
+        (Term name:top.state type:{'Reg'} msb:(IntConst 7) lsb:(IntConst 0))
+        (Term name:top.RST type:{'Input'} msb:(IntConst 0) lsb:(IntConst 0))
+        (Term name:top.value type:{'Input'} msb:(IntConst 31) lsb:(IntConst 0))
+        Bind:
+        (Bind dest:top.count tree:(Branch Cond:(Terminal top.RST) True:(IntConst 0) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 0)) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 1)) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 2)) True:(Operator Plus Next:(Terminal top.count),(Terminal top.value)))))))
+        (Bind dest:top.state tree:(Branch Cond:(Terminal top.RST) True:(IntConst 0) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 0)) True:(Branch Cond:(Terminal top.enable) True:(IntConst 1)) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 1)) True:(IntConst 2) False:(Branch Cond:(Operator Eq Next:(Terminal top.state),(IntConst 2)) True:(IntConst 0))))))
+        (Bind dest:top.led tree:(Partselect Var:(Terminal top.count) MSB:(IntConst 23) LSB:(IntConst 16)))
+        ```
+        
+        Let's view the result of dataflow analysis as a picture file. Now we select 'led' as the target. Please type the command as below. In this example, Graphviz and Pygraphviz are installed.
+        
+        ```
+        python3 pyverilog/examples/example_graphgen.py -t top -s top.led test.v 
+        ```
+        
+        Then you got a png file (out.png). The picture shows that the definition of 'led' is a part-selection of 'count' from 23-bit to 16-bit.
+        
+        ![out.png](img/out.png)
+        
+        Control-flow analyzer
+        ------------------------------
+        
+        Let's try control-flow analysis. Please type the command as below. In this example, Graphviz and Pygraphviz are installed. If don't use Graphviz, please append "--nograph" option.
+        
+        ```
+        python3 pyverilog/examples/example_controlflow_analyzer.py -t top test.v 
+        ```
+        
+        Then you got the result as below. The result shows that the state machine structure and transition conditions to the next state in the state machine.
+        
+        ```
+        FSM signal: top.count, Condition list length: 4
+        FSM signal: top.state, Condition list length: 5
+        Condition: (Ulnot, Eq), Inferring transition condition
+        Condition: (Eq, top.enable), Inferring transition condition
+        Condition: (Ulnot, Ulnot, Eq), Inferring transition condition
+        # SIGNAL NAME: top.state
+        # DELAY CNT: 0
+        0 --(top_enable>'d0)--> 1
+        1 --None--> 2
+        2 --None--> 0
+        Loop
+        (0, 1, 2)
+        ```
+        
+        You got also a png file (top_state.png), if you did not append "--nograph". The picture shows that the graphical structure of the state machine.
+        
+        ![top_state.png](img/top_state.png)
+        
+        Code generator
+        ------------------------------
+         
+        Finally, let's try code generation. Please prepare a Python script as below. The file name is 'test.py'.
+        A Verilog HDL code is represented by using the AST classes defined in 'vparser.ast'.
+        
+        ```python
+        from __future__ import absolute_import
+        from __future__ import print_function
+        import sys
+        import os
+        import pyverilog.vparser.ast as vast
+        from pyverilog.ast_code_generator.codegen import ASTCodeGenerator
+        
+        def main():
+            datawid = vast.Parameter( 'DATAWID', vast.Rvalue(vast.IntConst('32')) )
+            params = vast.Paramlist( [datawid] )
+            clk = vast.Ioport( vast.Input('CLK') )
+            rst = vast.Ioport( vast.Input('RST') )
+            width = vast.Width( vast.IntConst('7'), vast.IntConst('0') )
+            led = vast.Ioport( vast.Output('led', width=width) )
+            ports = vast.Portlist( [clk, rst, led] )
+        
+            width = vast.Width( vast.Minus(vast.Identifier('DATAWID'), vast.IntConst('1')), vast.IntConst('0') )
+            count = vast.Reg('count', width=width)
+        
+            assign = vast.Assign(
+                vast.Lvalue(vast.Identifier('led')), 
+                vast.Rvalue(
+                    vast.Partselect(
+                        vast.Identifier('count'), # count
+                        vast.Minus(vast.Identifier('DATAWID'), vast.IntConst('1')), # [DATAWID-1:
+                        vast.Minus(vast.Identifier('DATAWID'), vast.IntConst('8'))))) # :DATAWID-8]
+        
+            sens = vast.Sens(vast.Identifier('CLK'), type='posedge')
+            senslist = vast.SensList([ sens ])
+        
+            assign_count_true = vast.NonblockingSubstitution(
+                vast.Lvalue(vast.Identifier('count')),
+                vast.Rvalue(vast.IntConst('0')))
+            if0_true = vast.Block([ assign_count_true ])
+        
+            # count + 1
+            count_plus_1 = vast.Plus(vast.Identifier('count'), vast.IntConst('1'))
+            assign_count_false = vast.NonblockingSubstitution(
+                vast.Lvalue(vast.Identifier('count')),
+                vast.Rvalue(count_plus_1))
+            if0_false = vast.Block([ assign_count_false ])
+        
+            if0 = vast.IfStatement(vast.Identifier('RST'), if0_true, if0_false)
+            statement = vast.Block([ if0 ])
+        
+            always = vast.Always(senslist, statement)
+        
+            items = []
+            items.append(count)
+            items.append(assign)
+            items.append(always)
+        
+            ast = vast.ModuleDef("top", params, ports, items)
+            
+            codegen = ASTCodeGenerator()
+            rslt = codegen.visit(ast)
+            print(rslt)
+        
+        if __name__ == '__main__':
+            main()
+        ```
+        
+        Please type the command as below at the same directory with Pyverilog.
+        
+        ```
+        python3 test.py
+        ```
+        
+        Then Verilog HDL code generated from the AST instances is displayed.
+        
+        ```verilog
+        module top #
+        (
+          parameter DATAWID = 32
+        )
+        (
+          input CLK,
+          input RST,
+          output [7:0] led
+        );
+        
+          reg [DATAWID-1:0] count;
+          assign led = count[DATAWID-1:DATAWID-8];
+        
+          always @(posedge CLK) begin
+            if(RST) begin
+              count <= 0;
+            end else begin
+              count <= count + 1;
+            end
+          end
+        
+        
+        endmodule
+        ```
+        
+        
+        Related Project and Site
+        ==============================
+        
+        [Veriloggen](https://github.com/PyHDI/veriloggen)
+        - A Mixed-Paradigm Hardware Construction Framework
+        
+        [NNgen](https://github.com/NNgen/nngen)
+        - A Fully-Customizable Hardware Synthesis Compiler for Deep Neural Network
+        
+        [IPgen](https://github.com/PyHDI/ipgen)
+        - IP-core package generator for AXI4/Avalon
+        
+        [PyCoRAM](https://github.com/PyHDI/PyCoRAM)
+        - Python-based Portable IP-core Synthesis Framework for FPGA-based Computing
+        
+        [flipSyrup](https://github.com/shtaxxx/flipSyrup)
+        - Cycle-Accurate Hardware Simulation Framework on Abstract FPGA Platforms
+        
+        [Pyverilog_toolbox](https://github.com/fukatani/Pyverilog_toolbox)
+        - Pyverilog_toolbox is Pyverilog-based verification/design tool, which is developed by Fukatani-san and uses Pyverilog as a fundamental library. Thanks for your contribution!
+        
+        [shtaxxx.hatenablog.com](http://shtaxxx.hatenablog.com/entry/2014/01/01/045856)
+        - Blog entry for introduction and examples of Pyverilog (in Japansese)
+        
+Keywords: Verilog HDL,Lexer,Parser,Dataflow Analyzer,Control-flow Analyzer,Code Generator,Visualizer
+Platform: UNKNOWN
+Description-Content-Type: text/markdown
+Provides-Extra: graph
+Provides-Extra: test
diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/SOURCES.txt b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/SOURCES.txt
new file mode 100644
index 0000000..77d2fbd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/SOURCES.txt
@@ -0,0 +1,246 @@
+.travis.yml
+LICENSE
+MANIFEST.in
+Makefile
+README.md
+pytest.ini
+setup.cfg
+setup.py
+examples/Makefile
+examples/example_active_analyzer.py
+examples/example_active_range.py
+examples/example_ast_code.py
+examples/example_codegen.py
+examples/example_controlflow_analyzer.py
+examples/example_dataflow_analyzer.py
+examples/example_dataflow_codegen.py
+examples/example_graphgen.py
+examples/example_identifierreplace.py
+examples/example_identifiervisitor.py
+examples/example_lexer.py
+examples/example_merge.py
+examples/example_optimizer.py
+examples/example_parser.py
+examples/example_preprocessor.py
+examples/example_subset.py
+examples/example_walker.py
+img/out.png
+img/top_state.png
+pyverilog/Makefile
+pyverilog/VERSION
+pyverilog/__init__.py
+pyverilog.egg-info/PKG-INFO
+pyverilog.egg-info/SOURCES.txt
+pyverilog.egg-info/dependency_links.txt
+pyverilog.egg-info/requires.txt
+pyverilog.egg-info/top_level.txt
+pyverilog/ast_code_generator/__init__.py
+pyverilog/ast_code_generator/codegen.py
+pyverilog/ast_code_generator/touch.py
+pyverilog/ast_code_generator/template/__init__.py
+pyverilog/ast_code_generator/template/always.txt
+pyverilog/ast_code_generator/template/and.txt
+pyverilog/ast_code_generator/template/assign.txt
+pyverilog/ast_code_generator/template/block.txt
+pyverilog/ast_code_generator/template/blockingsubstitution.txt
+pyverilog/ast_code_generator/template/case.txt
+pyverilog/ast_code_generator/template/casestatement.txt
+pyverilog/ast_code_generator/template/casexstatement.txt
+pyverilog/ast_code_generator/template/concat.txt
+pyverilog/ast_code_generator/template/cond.txt
+pyverilog/ast_code_generator/template/constant.txt
+pyverilog/ast_code_generator/template/decl.txt
+pyverilog/ast_code_generator/template/delaystatement.txt
+pyverilog/ast_code_generator/template/description.txt
+pyverilog/ast_code_generator/template/disable.txt
+pyverilog/ast_code_generator/template/divide.txt
+pyverilog/ast_code_generator/template/eq.txt
+pyverilog/ast_code_generator/template/eql.txt
+pyverilog/ast_code_generator/template/eventstatement.txt
+pyverilog/ast_code_generator/template/floatconst.txt
+pyverilog/ast_code_generator/template/foreverstatement.txt
+pyverilog/ast_code_generator/template/forstatement.txt
+pyverilog/ast_code_generator/template/function.txt
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+tests/dataflow_test/test_dat_decimal.py
+tests/dataflow_test/test_dat_decimal_signed.py
+tests/dataflow_test/test_dat_decimal_width.py
+tests/dataflow_test/test_dat_function.py
+tests/dataflow_test/test_dat_generate.py
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+tests/dataflow_test/test_dat_led.py
+tests/dataflow_test/test_dat_partial.py
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+tests/dataflow_test/test_dat_primitive.py
+tests/dataflow_test/test_dat_ptr_clock_reset.py
+tests/dataflow_test/test_dat_reset.py
+tests/dataflow_test/test_dat_signed_task.py
+tests/dataflow_test/test_dat_supply.py
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+tests/parser_test/test_par_escape.py
+tests/parser_test/test_par_instance_array.py
+tests/parser_test/test_par_instance_empty_params.py
+tests/parser_test/test_par_led_main.py
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+verilogcode/case.v
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+verilogcode/count.v
+verilogcode/decimal.v
+verilogcode/decimal_signed.v
+verilogcode/decimal_width.v
+verilogcode/deepcase.v
+verilogcode/delay.v
+verilogcode/escape.v
+verilogcode/function.v
+verilogcode/generate.v
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+verilogcode/instance_array.v
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+verilogcode/reset.v
+verilogcode/signed_task.v
+verilogcode/statemachine.v
+verilogcode/supply.v
+verilogcode/vectoradd.v
\ No newline at end of file
diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/dependency_links.txt b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/dependency_links.txt
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/dependency_links.txt
@@ -0,0 +1 @@
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/installed-files.txt b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/installed-files.txt
new file mode 100644
index 0000000..66c1dc2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/installed-files.txt
@@ -0,0 +1,195 @@
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+../pyverilog/ast_code_generator/__pycache__/touch.cpython-39.pyc
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+../pyverilog/ast_code_generator/template/__pycache__/__init__.cpython-39.pyc
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+../pyverilog/ast_code_generator/template/casexstatement.txt
+../pyverilog/ast_code_generator/template/concat.txt
+../pyverilog/ast_code_generator/template/cond.txt
+../pyverilog/ast_code_generator/template/constant.txt
+../pyverilog/ast_code_generator/template/decl.txt
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+../pyverilog/ast_code_generator/template/divide.txt
+../pyverilog/ast_code_generator/template/eq.txt
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+../pyverilog/ast_code_generator/template/eventstatement.txt
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+../pyverilog/ast_code_generator/template/foreverstatement.txt
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+PKG-INFO
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diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/requires.txt b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/requires.txt
new file mode 100644
index 0000000..fe5f7a0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/requires.txt
@@ -0,0 +1,9 @@
+Jinja2>=2.10
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+
+[graph]
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+
+[test]
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diff --git a/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/top_level.txt b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/top_level.txt
new file mode 100644
index 0000000..7258179
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog-1.3.0.egg-info/top_level.txt
@@ -0,0 +1,2 @@
+pyverilog
+tests
diff --git a/venv/lib/python3.9/site-packages/pyverilog/VERSION b/venv/lib/python3.9/site-packages/pyverilog/VERSION
new file mode 100644
index 0000000..f0bb29e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/VERSION
@@ -0,0 +1 @@
+1.3.0
diff --git a/venv/lib/python3.9/site-packages/pyverilog/__init__.py b/venv/lib/python3.9/site-packages/pyverilog/__init__.py
new file mode 100644
index 0000000..3b4e375
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/__init__.py
@@ -0,0 +1,6 @@
+from __future__ import absolute_import
+from __future__ import print_function
+
+import os
+
+__version__ = open(os.path.join(os.path.dirname(__file__), "VERSION")).read().splitlines()[0]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/codegen.py b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/codegen.py
new file mode 100644
index 0000000..9b87569
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/codegen.py
@@ -0,0 +1,1030 @@
+"""
+   Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   ----
+   Code Generator from AST to Verilog HDL source code
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import math
+import re
+import functools
+from jinja2 import Environment, FileSystemLoader
+
+from pyverilog.vparser.ast import *
+from pyverilog.utils.op2mark import op2mark
+from pyverilog.utils.op2mark import op2order
+
+DEFAULT_TEMPLATE_DIR = os.path.dirname(os.path.abspath(__file__)) + '/template/'
+
+# -------------------------------------------------------------------------------
+try:
+    import textwrap
+    indent = textwrap.indent
+except:
+    def indent(text, prefix, predicate=None):
+        if predicate is None:
+            def predicate(x): return x and not x.isspace()
+        ret = []
+        for line in text.split('\n'):
+            if predicate(line):
+                ret.append(prefix)
+            ret.append(line)
+            ret.append('\n')
+        return ''.join(ret[:-1])
+
+
+def indent_multiline_assign(text):
+    ret = []
+    texts = text.split('\n')
+    if len(texts) <= 1:
+        return text
+    try:
+        p = texts[0].index('=')
+    except:
+        return text
+    ret.append(texts[0])
+    ret.append('\n')
+    ret.append(indent('\n'.join(texts[1:]), ' ' * (p + 2)))
+    return ''.join(ret)
+
+# -------------------------------------------------------------------------------
+
+
+class ConvertVisitor(object):
+    def visit(self, node):
+        method = 'visit_' + node.__class__.__name__
+        visitor = getattr(self, method, self.generic_visit)
+        return visitor(node)
+
+    def generic_visit(self, node):
+        ret = []
+        for c in node.children():
+            ret.append(self.visit(c))
+        return ''.join(ret)
+
+
+def getfilename(node):
+    return node.__class__.__name__.lower() + '.txt'
+
+
+def escape(s):
+    if s.startswith('\\'):
+        return s + ' '
+    return s
+
+
+def del_paren(s):
+    if s.startswith('(') and s.endswith(')'):
+        return s[1:-1]
+    return s
+
+
+def del_space(s):
+    return s.replace(' ', '')
+
+
+class ASTCodeGenerator(ConvertVisitor):
+    def __init__(self, indentsize=2):
+        self.env = Environment(loader=FileSystemLoader(DEFAULT_TEMPLATE_DIR))
+        self.indent = functools.partial(indent, prefix=' ' * indentsize)
+        self.template_cache = {}
+
+    def get_template(self, filename):
+        if filename in self.template_cache:
+            return self.template_cache[filename]
+
+        template = self.env.get_template(filename)
+        self.template_cache[filename] = template
+        return template
+
+    def visit_Source(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'description': self.visit(node.description),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Description(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'definitions': [self.visit(definition) for definition in node.definitions],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_ModuleDef(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        paramlist = self.indent(self.visit(node.paramlist)) if node.paramlist is not None else ''
+        portlist = self.indent(self.visit(node.portlist)) if node.portlist is not None else ''
+        template_dict = {
+            'modulename': escape(node.name),
+            'paramlist': paramlist,
+            'portlist': portlist,
+            'items': [self.indent(self.visit(item)) for item in node.items] if node.items else (),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Paramlist(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        params = [self.visit(param).replace(';', '') for param in node.params]
+        template_dict = {
+            'params': params,
+            'len_params': len(params),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Portlist(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        ports = [self.visit(port) for port in node.ports]
+        template_dict = {
+            'ports': ports,
+            'len_ports': len(ports),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Port(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Width(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'msb': del_space(del_paren(self.visit(node.msb))),
+            'lsb': del_space(del_paren(self.visit(node.lsb))),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Length(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'msb': del_space(del_paren(self.visit(node.msb))),
+            'lsb': del_space(del_paren(self.visit(node.lsb))),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Identifier(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'scope': '' if node.scope is None else self.visit(node.scope),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Value(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': node.value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Constant(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': node.value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_IntConst(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': node.value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_FloatConst(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': node.value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_StringConst(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': node.value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Variable(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Input(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Output(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Inout(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Tri(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Wire(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Reg(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None else self.visit(node.width),
+            'signed': node.signed,
+            'dimensions': '' if node.dimensions is None else self.visit(node.dimensions),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Integer(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'signed': node.signed,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Real(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Genvar(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Ioport(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'first': node.first.__class__.__name__.lower(),
+            'second': '' if node.second is None else node.second.__class__.__name__.lower(),
+            'name': escape(node.first.name),
+            'width': '' if node.first.width is None else self.visit(node.first.width),
+            'signed': node.first.signed or (node.second is not None and node.second.signed),
+            'dimensions': '' if node.first.dimensions is None else self.visit(node.first.dimensions)
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Parameter(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        value = self.visit(node.value)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None or (value.startswith('"') and value.endswith('"')) else self.visit(node.width),
+            'value': value,
+            'signed': node.signed,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Localparam(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        value = self.visit(node.value)
+        template_dict = {
+            'name': escape(node.name),
+            'width': '' if node.width is None or (value.startswith('"') and value.endswith('"')) else self.visit(node.width),
+            'value': value,
+            'signed': node.signed,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Decl(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'items': [self.visit(item) for item in node.list],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Concat(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        items = [del_paren(self.visit(item)) for item in node.list]
+        template_dict = {
+            'items': items,
+            'len_items': len(items),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_LConcat(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        items = [del_paren(self.visit(item)) for item in node.list]
+        template_dict = {
+            'items': items,
+            'len_items': len(items),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Repeat(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'value': del_paren(self.visit(node.value)),
+            'times': del_paren(self.visit(node.times)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Partselect(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'var': self.visit(node.var),
+            'msb': del_space(del_paren(self.visit(node.msb))),
+            'lsb': del_space(del_paren(self.visit(node.lsb))),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Pointer(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'var': self.visit(node.var),
+            'ptr': del_paren(self.visit(node.ptr)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Lvalue(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'var': del_paren(self.visit(node.var)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Rvalue(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'var': del_paren(self.visit(node.var)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Operator(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        order = op2order(node.__class__.__name__)
+        lorder = op2order(node.left.__class__.__name__)
+        rorder = op2order(node.right.__class__.__name__)
+        left = self.visit(node.left)
+        right = self.visit(node.right)
+        if ((not isinstance(node.left, (Sll, Srl, Sra,
+                                        LessThan, GreaterThan, LessEq, GreaterEq,
+                                        Eq, NotEq, Eql, NotEql))) and
+                (lorder is not None and lorder <= order)):
+            left = del_paren(left)
+        if ((not isinstance(node.right, (Sll, Srl, Sra,
+                                         LessThan, GreaterThan, LessEq, GreaterEq,
+                                         Eq, NotEq, Eql, NotEql))) and
+                (rorder is not None and order > rorder)):
+            right = del_paren(right)
+        template_dict = {
+            'left': left,
+            'right': right,
+            'op': op2mark(node.__class__.__name__),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_UnaryOperator(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        right = self.visit(node.right)
+        template_dict = {
+            'right': right,
+            'op': op2mark(node.__class__.__name__),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Uplus(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Uminus(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Ulnot(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Unot(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Uand(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Unand(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Uor(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Unor(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Uxor(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Uxnor(self, node):
+        return self.visit_UnaryOperator(node)
+
+    def visit_Power(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Times(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Divide(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Mod(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Plus(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Minus(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Sll(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Srl(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Sra(self, node):
+        return self.visit_Operator(node)
+
+    def visit_LessThan(self, node):
+        return self.visit_Operator(node)
+
+    def visit_GreaterThan(self, node):
+        return self.visit_Operator(node)
+
+    def visit_LessEq(self, node):
+        return self.visit_Operator(node)
+
+    def visit_GreaterEq(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Eq(self, node):
+        return self.visit_Operator(node)
+
+    def visit_NotEq(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Eql(self, node):
+        return self.visit_Operator(node)
+
+    def visit_NotEql(self, node):
+        return self.visit_Operator(node)
+
+    def visit_And(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Xor(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Xnor(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Or(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Land(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Lor(self, node):
+        return self.visit_Operator(node)
+
+    def visit_Cond(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        true_value = del_paren(self.visit(node.true_value))
+        false_value = del_paren(self.visit(node.false_value))
+        if isinstance(node.false_value, Cond):
+            false_value = ''.join(['\n', false_value])
+        template_dict = {
+            'cond': del_paren(self.visit(node.cond)),
+            'true_value': true_value,
+            'false_value': false_value,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Assign(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'left': self.visit(node.left),
+            'right': self.visit(node.right),
+        }
+        rslt = template.render(template_dict)
+        rslt = indent_multiline_assign(rslt)
+        return rslt
+
+    def visit_Always(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'sens_list': self.visit(node.sens_list),
+            'statement': self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_SensList(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        items = [self.visit(item) for item in node.list]
+        template_dict = {
+            'items': items,
+            'len_items': len(items),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Sens(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'sig': '*' if node.type == 'all' else self.visit(node.sig),
+            'type': node.type if node.type == 'posedge' or node.type == 'negedge' else ''
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Substitution(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'left': self.visit(node.left),
+            'right': self.visit(node.right),
+            'ldelay': '' if node.ldelay is None else self.visit(node.ldelay),
+            'rdelay': '' if node.rdelay is None else self.visit(node.rdelay),
+        }
+        rslt = template.render(template_dict)
+        rslt = indent_multiline_assign(rslt)
+        return rslt
+
+    def visit_BlockingSubstitution(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'left': self.visit(node.left),
+            'right': self.visit(node.right),
+            'ldelay': '' if node.ldelay is None else self.visit(node.ldelay),
+            'rdelay': '' if node.rdelay is None else self.visit(node.rdelay),
+        }
+        rslt = template.render(template_dict)
+        rslt = indent_multiline_assign(rslt)
+        return rslt
+
+    def visit_NonblockingSubstitution(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'left': self.visit(node.left),
+            'right': self.visit(node.right),
+            'ldelay': '' if node.ldelay is None else self.visit(node.ldelay),
+            'rdelay': '' if node.rdelay is None else self.visit(node.rdelay),
+        }
+        rslt = template.render(template_dict)
+        rslt = indent_multiline_assign(rslt)
+        return rslt
+
+    def visit_IfStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        true_statement = '' if node.true_statement is None else self.visit(node.true_statement)
+        false_statement = '' if node.false_statement is None else self.visit(node.false_statement)
+        template_dict = {
+            'cond': del_paren(self.visit(node.cond)),
+            'true_statement': true_statement,
+            'false_statement': false_statement,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_ForStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'pre': '' if node.pre is None else del_space(self.visit(node.pre)),
+            'cond': '' if node.cond is None else del_space(del_paren(self.visit(node.cond))),
+            'post': '' if node.post is None else del_space(self.visit(node.post).replace(';', '')),
+            'statement': '' if node.statement is None else self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_WhileStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'cond': '' if node.cond is None else del_paren(self.visit(node.cond)),
+            'statement': '' if node.statement is None else self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_CaseStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'comp': del_paren(self.visit(node.comp)),
+            'caselist': [self.indent(self.visit(case)) for case in node.caselist],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_CasexStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'comp': del_paren(self.visit(node.comp)),
+            'caselist': [self.indent(self.visit(case)) for case in node.caselist],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Case(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        condlist = ['default'] if node.cond is None else [
+            del_paren(self.visit(c)) for c in node.cond]
+        cond = []
+        for c in condlist:
+            cond.append(c)
+            cond.append(', ')
+        template_dict = {
+            'cond': ''.join(cond[:-1]),
+            'statement': self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Block(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'scope': '' if node.scope is None else escape(node.scope),
+            'statements': [self.indent(self.visit(statement)) for statement in node.statements],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Initial(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'statement': self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_EventStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'senslist': del_paren(self.visit(node.senslist)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_WaitStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'cond': del_paren(self.visit(node.cond)),
+            'statement': self.visit(node.statement) if node.statement else '',
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_ForeverStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'statement': self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_DelayStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'delay': self.visit(node.delay),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_InstanceList(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        parameterlist = [self.indent(self.visit(param)) for param in node.parameterlist]
+        instances = [self.visit(instance) for instance in node.instances]
+        template_dict = {
+            'module': escape(node.module),
+            'parameterlist': parameterlist,
+            'len_parameterlist': len(parameterlist),
+            'instances': instances,
+            'len_instances': len(instances),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Instance(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        array = '' if node.array is None else self.visit(node.array)
+        portlist = [self.indent(self.visit(port)) for port in node.portlist]
+        template_dict = {
+            'name': escape(node.name),
+            'array': array,
+            'portlist': portlist,
+            'len_portlist': len(portlist),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_ParamArg(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'paramname': '' if node.paramname is None else escape(node.paramname),
+            'argname': '' if node.argname is None else del_paren(self.visit(node.argname)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_PortArg(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'portname': '' if node.portname is None else escape(node.portname),
+            'argname': '' if node.argname is None else del_paren(self.visit(node.argname)),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Function(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        statement = [self.indent(self.visit(s)) for s in node.statement]
+        template_dict = {
+            'name': escape(node.name),
+            'retwidth': self.visit(node.retwidth),
+            'statement': statement,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_FunctionCall(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        args = [self.visit(arg) for arg in node.args]
+        template_dict = {
+            'name': self.visit(node.name),
+            'args': args,
+            'len_args': len(args),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Task(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        statement = [self.indent(self.visit(s)) for s in node.statement]
+        template_dict = {
+            'name': escape(node.name),
+            'statement': statement,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    # def visit_TaskCall(self, node):
+    #    filename = getfilename(node)
+    #    template = self.get_template(filename)
+    #    args = [ self.visit(arg) for arg in node.args ]
+    #    template_dict = {
+    #        'name' : self.visit(node.name),
+    #        'args' : args,
+    #        'len_args' : len(args),
+    #        }
+    #    rslt = template.render(template_dict)
+    #    return rslt
+
+    def visit_GenerateStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'items': [self.visit(item) for item in node.items]
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_SystemCall(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        args = [self.visit(arg) for arg in node.args]
+        template_dict = {
+            'syscall': escape(node.syscall),
+            'args': args,
+            'len_args': len(args),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_IdentifierScopeLabel(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'loop': '' if node.loop is None else self.visit(node.loop),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_IdentifierScope(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        scopes = [self.visit(scope) for scope in node.labellist]
+        template_dict = {
+            'scopes': scopes,
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Pragma(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'entry': self.visit(node.entry),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_PragmaEntry(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.name),
+            'value': '' if node.value is None else self.visit(node.value),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_Disable(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'name': escape(node.dest),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_ParallelBlock(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'scope': '' if node.scope is None else escape(node.scope),
+            'statements': [self.indent(self.visit(statement)) for statement in node.statements],
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_SingleStatement(self, node):
+        filename = getfilename(node)
+        template = self.get_template(filename)
+        template_dict = {
+            'statement': self.visit(node.statement),
+        }
+        rslt = template.render(template_dict)
+        return rslt
+
+    def visit_EmbeddedCode(self, node):
+        return node.code
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__init__.py b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..c449f29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/always.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/always.txt
new file mode 100644
index 0000000..299eee8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/always.txt
@@ -0,0 +1,3 @@
+
+always @({{ sens_list }}) {{ statement }}
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/and.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/and.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/and.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/assign.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/assign.txt
new file mode 100644
index 0000000..86c1391
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/assign.txt
@@ -0,0 +1 @@
+assign {{ left }} = {{ right }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/block.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/block.txt
new file mode 100644
index 0000000..25010b0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/block.txt
@@ -0,0 +1,5 @@
+begin{% if scope != '' %} : {{ scope }}{% endif %}
+{%- for statement in statements %}
+{{ statement }}
+{%- endfor %}
+end
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/blockingsubstitution.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/blockingsubstitution.txt
new file mode 100644
index 0000000..ffff1f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/blockingsubstitution.txt
@@ -0,0 +1 @@
+{% if ldelay != '' %}{{ ldelay }} {% endif %}{{ left }} = {% if rdelay != '' %}{{ rdelay }} {% endif %}{{ right }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/case.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/case.txt
new file mode 100644
index 0000000..953b911
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/case.txt
@@ -0,0 +1 @@
+{{ cond }}: {{ statement }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casestatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casestatement.txt
new file mode 100644
index 0000000..d314262
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casestatement.txt
@@ -0,0 +1,5 @@
+case({{ comp }})
+{%- for case in caselist %}
+{{ case }}
+{%- endfor %}
+endcase
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casexstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casexstatement.txt
new file mode 100644
index 0000000..7f855ab
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/casexstatement.txt
@@ -0,0 +1,5 @@
+casex({{ comp }})
+{%- for case in caselist %}
+{{ case }}
+{%- endfor %}
+endcase
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/concat.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/concat.txt
new file mode 100644
index 0000000..0871549
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/concat.txt
@@ -0,0 +1 @@
+{ {% for item in items %}{{ item }}{% if loop.index < len_items %}, {% endif %}{% endfor %} }
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/cond.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/cond.txt
new file mode 100644
index 0000000..70e23e7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/cond.txt
@@ -0,0 +1 @@
+(({{ cond }})? {{ true_value }} : {{ false_value }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/constant.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/constant.txt
new file mode 100644
index 0000000..40cf72a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/constant.txt
@@ -0,0 +1 @@
+{{ value }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/decl.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/decl.txt
new file mode 100644
index 0000000..fa34e9c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/decl.txt
@@ -0,0 +1,2 @@
+{%- for item in items %}{{ item }}
+{%- endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/delaystatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/delaystatement.txt
new file mode 100644
index 0000000..e07c23f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/delaystatement.txt
@@ -0,0 +1 @@
+#{{ delay }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/description.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/description.txt
new file mode 100644
index 0000000..58c9774
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/description.txt
@@ -0,0 +1,3 @@
+{% for definition in definitions %}
+{{ definition }}
+{% endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/disable.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/disable.txt
new file mode 100644
index 0000000..a0a9ae8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/disable.txt
@@ -0,0 +1 @@
+diable {{ name }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/divide.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/divide.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/divide.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eq.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eq.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eq.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eql.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eql.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eql.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eventstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eventstatement.txt
new file mode 100644
index 0000000..098301c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/eventstatement.txt
@@ -0,0 +1 @@
+@({{ senslist }});
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/floatconst.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/floatconst.txt
new file mode 100644
index 0000000..40cf72a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/floatconst.txt
@@ -0,0 +1 @@
+{{ value }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/foreverstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/foreverstatement.txt
new file mode 100644
index 0000000..9859439
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/foreverstatement.txt
@@ -0,0 +1 @@
+forever {{ statement }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/forstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/forstatement.txt
new file mode 100644
index 0000000..8ae746f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/forstatement.txt
@@ -0,0 +1 @@
+for({{ pre }} {{ cond }}; {{ post }}) {{ statement }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/function.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/function.txt
new file mode 100644
index 0000000..0186fd8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/function.txt
@@ -0,0 +1,7 @@
+
+function {{ retwidth }} {{ name }};
+{%- for s in statement %}
+{{ s }}
+{%- endfor %}
+endfunction
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/functioncall.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/functioncall.txt
new file mode 100644
index 0000000..e2373f0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/functioncall.txt
@@ -0,0 +1 @@
+{{ name }}({% for arg in args %}{{ arg }}{% if loop.index < len_args %}, {% endif %}{% endfor %})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/generatestatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/generatestatement.txt
new file mode 100644
index 0000000..f7447a0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/generatestatement.txt
@@ -0,0 +1,4 @@
+
+generate {% for item in items %}{{ item }}{% endfor %}
+endgenerate
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/genvar.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/genvar.txt
new file mode 100644
index 0000000..7cd2948
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/genvar.txt
@@ -0,0 +1 @@
+genvar {{ name }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greatereq.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greatereq.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greatereq.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greaterthan.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greaterthan.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/greaterthan.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifier.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifier.txt
new file mode 100644
index 0000000..5b6eb2f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifier.txt
@@ -0,0 +1 @@
+{{ scope }}{{ name }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscope.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscope.txt
new file mode 100644
index 0000000..9487617
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscope.txt
@@ -0,0 +1 @@
+{% for scope in scopes %}{{ scope }}{% endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscopelabel.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscopelabel.txt
new file mode 100644
index 0000000..5f73a32
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/identifierscopelabel.txt
@@ -0,0 +1 @@
+{{ name }}{%- if loop != '' %}[{{ loop }}]{%- endif %}.
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ifstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ifstatement.txt
new file mode 100644
index 0000000..84fb387
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ifstatement.txt
@@ -0,0 +1,5 @@
+if({{ cond }}) {{ true_statement }}
+{%- if true_statement[-1] != ' ' and true_statement[-1] != '\n' %} {% endif -%}
+{%- if true_statement.count('\n') == 0 and false_statement != '' %}
+{% endif -%}
+{%- if false_statement != '' %}else {{ false_statement }}{% endif -%}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/initial.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/initial.txt
new file mode 100644
index 0000000..06e90e8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/initial.txt
@@ -0,0 +1,3 @@
+
+initial {{ statement }}
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/inout.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/inout.txt
new file mode 100644
index 0000000..d3681a9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/inout.txt
@@ -0,0 +1 @@
+inout {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/input.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/input.txt
new file mode 100644
index 0000000..30287d6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/input.txt
@@ -0,0 +1 @@
+input {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instance.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instance.txt
new file mode 100644
index 0000000..abc84f4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instance.txt
@@ -0,0 +1,5 @@
+{{ name }}{{ array }}
+({% for port in portlist %}
+{{ port }}{%- if loop.index < len_portlist -%}, {%- endif -%}
+{% endfor %}
+)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instancelist.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instancelist.txt
new file mode 100644
index 0000000..81e2025
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/instancelist.txt
@@ -0,0 +1,12 @@
+
+{{ module }}
+{%- if len_parameterlist > 0 %}
+#({% for param in parameterlist %}
+{{ param }}{%- if loop.index < len_parameterlist -%},
+{%- endif -%}{% endfor %}
+)
+{%- endif %}
+{%- for instance in instances %}
+{{ instance }}{%- if loop.index < len_instances -%},
+{%- endif -%}{%- endfor -%};
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/intconst.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/intconst.txt
new file mode 100644
index 0000000..40cf72a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/intconst.txt
@@ -0,0 +1 @@
+{{ value }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/integer.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/integer.txt
new file mode 100644
index 0000000..4f9e337
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/integer.txt
@@ -0,0 +1 @@
+integer {{ name }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ioport.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ioport.txt
new file mode 100644
index 0000000..190651c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ioport.txt
@@ -0,0 +1 @@
+{{ first }} {% if second != '' %}{{ second }} {% endif %}{% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/land.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/land.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/land.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lconcat.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lconcat.txt
new file mode 100644
index 0000000..0871549
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lconcat.txt
@@ -0,0 +1 @@
+{ {% for item in items %}{{ item }}{% if loop.index < len_items %}, {% endif %}{% endfor %} }
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/length.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/length.txt
new file mode 100644
index 0000000..429ac57
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/length.txt
@@ -0,0 +1 @@
+[{{ msb }}:{{ lsb }}]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lesseq.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lesseq.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lesseq.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lessthan.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lessthan.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lessthan.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/localparam.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/localparam.txt
new file mode 100644
index 0000000..74833ed
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/localparam.txt
@@ -0,0 +1 @@
+localparam {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }} = {{ value }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lor.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lor.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lvalue.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lvalue.txt
new file mode 100644
index 0000000..79eec39
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/lvalue.txt
@@ -0,0 +1 @@
+{{ var }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/minus.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/minus.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/minus.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/mod.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/mod.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/mod.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/moduledef.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/moduledef.txt
new file mode 100644
index 0000000..653bdf9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/moduledef.txt
@@ -0,0 +1,14 @@
+
+module {{ modulename }}{% if paramlist != '' %} #
+(
+{{ paramlist }}
+)
+{%- endif %}
+(
+{{ portlist }}
+);
+
+{% for item in items %}{{ item }}
+{% endfor %}
+endmodule
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/nonblockingsubstitution.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/nonblockingsubstitution.txt
new file mode 100644
index 0000000..5520fe1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/nonblockingsubstitution.txt
@@ -0,0 +1 @@
+{% if ldelay != '' %}{{ ldelay }} {% endif %}{{ left }} <= {% if rdelay != '' %}{{ rdelay }} {% endif %}{{ right }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteq.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteq.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteq.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteql.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteql.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/noteql.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/operator.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/operator.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/operator.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/or.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/or.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/or.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/output.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/output.txt
new file mode 100644
index 0000000..8e1fc57
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/output.txt
@@ -0,0 +1 @@
+output {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parallelblock.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parallelblock.txt
new file mode 100644
index 0000000..7fa94a5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parallelblock.txt
@@ -0,0 +1,5 @@
+fork{% if scope != '' %} : {{ scope }}{% endif %}
+{%- for statement in statements %}
+{{ statement }}
+{%- endfor %}
+join
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramarg.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramarg.txt
new file mode 100644
index 0000000..d752bd8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramarg.txt
@@ -0,0 +1 @@
+{%- if paramname != '' -%}.{{ paramname }}({{ argname }}){%- else -%}{{ argname }}{%- endif -%}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parameter.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parameter.txt
new file mode 100644
index 0000000..ee2a82b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/parameter.txt
@@ -0,0 +1 @@
+parameter {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }} = {{ value }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramlist.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramlist.txt
new file mode 100644
index 0000000..d05008b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/paramlist.txt
@@ -0,0 +1,2 @@
+{% for param in params %}{{ param }}{% if loop.index < len_params %},
+{% endif %}{% endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/partselect.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/partselect.txt
new file mode 100644
index 0000000..c11a2ea
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/partselect.txt
@@ -0,0 +1 @@
+{{ var }}[{{ msb }}:{{ lsb }}]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/plus.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/plus.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/plus.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pointer.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pointer.txt
new file mode 100644
index 0000000..629968f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pointer.txt
@@ -0,0 +1 @@
+{{ var }}[{{ ptr }}]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/port.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/port.txt
new file mode 100644
index 0000000..aa2bf89
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/port.txt
@@ -0,0 +1 @@
+{{ name }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portarg.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portarg.txt
new file mode 100644
index 0000000..2f085ba
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portarg.txt
@@ -0,0 +1 @@
+{%- if portname != '' -%}.{{ portname }}({{ argname }}){%- else -%}{{ argname }}{%- endif -%}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portlist.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portlist.txt
new file mode 100644
index 0000000..fceaa98
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/portlist.txt
@@ -0,0 +1,2 @@
+{% for port in ports %}{{ port }}{% if loop.index < len_ports %},
+{% endif %}{% endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/power.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/power.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/power.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragma.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragma.txt
new file mode 100644
index 0000000..9386dd0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragma.txt
@@ -0,0 +1 @@
+(* {{ entry }} *)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragmaentry.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragmaentry.txt
new file mode 100644
index 0000000..55040c3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/pragmaentry.txt
@@ -0,0 +1 @@
+{{ name }}{% if value != '' %} = {{ value }}{% endif %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/real.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/real.txt
new file mode 100644
index 0000000..a96a730
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/real.txt
@@ -0,0 +1 @@
+real {{ name }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/reg.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/reg.txt
new file mode 100644
index 0000000..510fc52
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/reg.txt
@@ -0,0 +1 @@
+reg {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/repeat.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/repeat.txt
new file mode 100644
index 0000000..b5ba9ff
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/repeat.txt
@@ -0,0 +1 @@
+{ {{ times }}{{ value }} }
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/rvalue.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/rvalue.txt
new file mode 100644
index 0000000..79eec39
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/rvalue.txt
@@ -0,0 +1 @@
+{{ var }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sens.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sens.txt
new file mode 100644
index 0000000..1a8f906
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sens.txt
@@ -0,0 +1 @@
+{% if type != '' %}{{ type }} {% endif %}{{ sig }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/senslist.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/senslist.txt
new file mode 100644
index 0000000..2150fdc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/senslist.txt
@@ -0,0 +1 @@
+{% for item in items %}{{ item }}{% if loop.index < len_items %} or {% endif %}{% endfor %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/singlestatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/singlestatement.txt
new file mode 100644
index 0000000..df24b4e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/singlestatement.txt
@@ -0,0 +1 @@
+{{ statement }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sla.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sla.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sla.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sll.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sll.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sll.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/source.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/source.txt
new file mode 100644
index 0000000..6e7fc52
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/source.txt
@@ -0,0 +1 @@
+{{ description }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sra.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sra.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/sra.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/srl.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/srl.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/srl.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/stringconst.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/stringconst.txt
new file mode 100644
index 0000000..0db5d79
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/stringconst.txt
@@ -0,0 +1 @@
+"{{ value }}"
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/substitution.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/substitution.txt
new file mode 100644
index 0000000..ffff1f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/substitution.txt
@@ -0,0 +1 @@
+{% if ldelay != '' %}{{ ldelay }} {% endif %}{{ left }} = {% if rdelay != '' %}{{ rdelay }} {% endif %}{{ right }};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/systemcall.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/systemcall.txt
new file mode 100644
index 0000000..26f8ddd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/systemcall.txt
@@ -0,0 +1 @@
+${{ syscall }}{% if len_args > 0 %}({% endif %}{% for arg in args %}{{ arg }}{% if loop.index < len_args %}, {% endif %}{% endfor %}{% if len_args > 0 %}){% endif %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/task.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/task.txt
new file mode 100644
index 0000000..e83993c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/task.txt
@@ -0,0 +1,7 @@
+
+task {{ name }};
+{%- for s in statement %}
+{{ s }}
+{%- endfor %}
+endtask
+
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/times.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/times.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/times.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/tri.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/tri.txt
new file mode 100644
index 0000000..907ae73
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/tri.txt
@@ -0,0 +1 @@
+tri {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uand.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uand.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uand.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ulnot.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ulnot.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/ulnot.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uminus.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uminus.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uminus.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unand.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unand.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unand.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unaryoperator.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unaryoperator.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unaryoperator.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unor.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unor.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unot.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unot.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/unot.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uor.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uor.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uplus.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uplus.txt
new file mode 100644
index 0000000..89d5ca7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uplus.txt
@@ -0,0 +1 @@
+({{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxnor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxnor.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxnor.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxor.txt
new file mode 100644
index 0000000..15edcb1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/uxor.txt
@@ -0,0 +1 @@
+({{ op }}{{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/value.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/value.txt
new file mode 100644
index 0000000..40cf72a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/value.txt
@@ -0,0 +1 @@
+{{ value }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/variable.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/variable.txt
new file mode 100644
index 0000000..e62ee31
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/variable.txt
@@ -0,0 +1 @@
+variable {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/waitstatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/waitstatement.txt
new file mode 100644
index 0000000..90083b7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/waitstatement.txt
@@ -0,0 +1 @@
+wait({{ cond }}){% if statement != '' %} {{ statement }}{% else %};{% endif %}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/whilestatement.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/whilestatement.txt
new file mode 100644
index 0000000..07ee384
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/whilestatement.txt
@@ -0,0 +1 @@
+while({{ cond }}) {{ statement }}
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/width.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/width.txt
new file mode 100644
index 0000000..429ac57
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/width.txt
@@ -0,0 +1 @@
+[{{ msb }}:{{ lsb }}]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/wire.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/wire.txt
new file mode 100644
index 0000000..490813c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/wire.txt
@@ -0,0 +1 @@
+wire {% if signed %}signed {% endif %}{% if width != '' %}{{ width }} {% endif %}{{ name }}{% if dimensions != '' %} {{ dimensions }}{% endif %};
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xnor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xnor.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xnor.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xor.txt b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xor.txt
new file mode 100644
index 0000000..95f24f5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/template/xor.txt
@@ -0,0 +1 @@
+({{ left }} {{ op }} {{ right }})
diff --git a/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/touch.py b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/touch.py
new file mode 100644
index 0000000..7c44cce
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/ast_code_generator/touch.py
@@ -0,0 +1,9 @@
+import os
+import sys
+import subprocess
+
+text = open('list_ast.txt', 'r').read()
+lines = text.split('\n')
+for line in lines:
+    if line != '':
+        subprocess.call('touch template/' + line.lower() + '.txt', shell=True)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__init__.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..471b264
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_analyzer.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_analyzer.cpython-39.pyc
new file mode 100644
index 0000000..5bfe511
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_analyzer.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_range.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_range.cpython-39.pyc
new file mode 100644
index 0000000..f14b2d7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/active_range.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/controlflow_analyzer.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/controlflow_analyzer.cpython-39.pyc
new file mode 100644
index 0000000..3547e1d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/controlflow_analyzer.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/splitter.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/splitter.cpython-39.pyc
new file mode 100644
index 0000000..6dc6aff
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/splitter.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/transition.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/transition.cpython-39.pyc
new file mode 100644
index 0000000..8476ca5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/__pycache__/transition.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_analyzer.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_analyzer.py
new file mode 100644
index 0000000..273f3cc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_analyzer.py
@@ -0,0 +1,76 @@
+# -------------------------------------------------------------------------------
+# active_analyzer.py
+#
+# Active condition list generator from Verilog Definitions
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.dataflow.dataflow import *
+import pyverilog.controlflow.splitter as splitter
+import pyverilog.controlflow.transition as transition
+from pyverilog.controlflow.controlflow_analyzer import VerilogControlflowAnalyzer
+
+
+class VerilogActiveConditionAnalyzer(VerilogControlflowAnalyzer):
+    def __init__(self, topmodule, terms, binddict,
+                 resolved_terms, resolved_binddict, constlist):
+        VerilogControlflowAnalyzer.__init__(self, topmodule, terms, binddict,
+                                            resolved_terms, resolved_binddict, constlist)
+        self.fsm_loops, self.fsms = self.getLoops()
+
+    def getActiveConditions(self, termname, condition=splitter.active_constant):
+        if not termname in self.resolved_binddict:
+            return {}
+        tree = self.makeTree(termname)
+        funcdict = splitter.split(tree)
+        funcdict = splitter.filter(funcdict, termname, condition)
+        funcdict = splitter.remove_reset_condition(funcdict)
+
+        if len(funcdict) == 1 and len(list(funcdict.keys())[0]) == 0:
+            func = funcdict.values()[0]
+            return {termname: (('any', None), )}
+
+        active_conditions = {}
+        active_conditions_size = 0
+        for fsm_sig in self.fsms.keys():
+            rslt = self.getActiveConditions_fsm(fsm_sig, funcdict)
+            if len(rslt) > 0:
+                active_conditions[fsm_sig] = rslt
+            active_conditions_size += len(rslt)
+
+        if active_conditions_size == 0:
+            rslt = self.getActiveConditions_fsm(termname, funcdict)
+            if len(rslt) > 0:
+                active_conditions[termname] = rslt
+
+        return active_conditions
+
+    def getActiveConditions_fsm(self, fsm_sig, funcdict):
+        # returns a list of some (state, transcond) pairs
+        active_conditions = []
+        fsm_sig_width = self.getWidth(fsm_sig)
+        for condlist, func in sorted(funcdict.items(), key=lambda x: len(x[0])):
+            node = transition.walkCondlist(condlist, fsm_sig, fsm_sig_width)
+            state_node_list = []
+            if isinstance(node, transition.StateNodeList):
+                for n in node.nodelist:
+                    state_node_list.append(n)
+            elif node:
+                state_node_list.append(node)
+
+            for state_node in state_node_list:
+                # if state_node.isany:
+                #    active_conditions.append( ('any', state_node.transcond) )
+                for rs, re in state_node.range_pairs:
+                    for state in range(rs, re + 1):
+                        transcond = self.optimizer.optimize(state_node.transcond)
+                        if isinstance(transcond, DFEvalValue) and transcond.value == 0:
+                            continue
+                        active_conditions.append((state, transcond))
+        return tuple(active_conditions)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_range.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_range.py
new file mode 100644
index 0000000..2c510ac
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/active_range.py
@@ -0,0 +1,685 @@
+# -------------------------------------------------------------------------------
+# active_range.py (Obsoluted)
+#
+# Active condition analyzer from dataflow
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.utils.util as util
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.utils.inference as inference
+from pyverilog.dataflow.dataflow import *
+import pyverilog.controlflow.splitter as splitter
+from pyverilog.controlflow.controlflow_analyzer import VerilogControlflowAnalyzer
+
+
+class VerilogActiveAnalyzer(VerilogControlflowAnalyzer):
+    def __init__(self, topmodule, terms, binddict,
+                 resolved_terms, resolved_binddict, constlist):
+        VerilogControlflowAnalyzer.__init__(self, topmodule, terms, binddict,
+                                            resolved_terms, resolved_binddict, constlist)
+
+    def getActiveConditions(self, termname, op='>', conditionvalue=0):
+        if not termname in self.resolved_binddict:
+            return ()
+        tree = self.makeConditionalTree(termname, step=0)
+        funcdict = splitter.split(tree)
+        condlists = self.getActiveFuncdictKeys(funcdict, op=op, conditionvalue=conditionvalue)
+        active_conditions = self.inferActiveConditions(condlists)
+        return active_conditions  # OR-style
+
+    def getChangedConditions(self, termname):
+        if not termname in self.resolved_binddict:
+            return ()
+        bindlist = self.resolved_binddict[termname]
+        termtype = self.getTermtype(termname)
+        tree = self.makeTree(termname)
+        funcdict = splitter.split(tree)
+        if len(funcdict) == 0:
+            return ()
+        changed_condlists = self.getChangedFuncdictKeys(funcdict, termname)
+        changed_conditions = self.inferActiveConditions(changed_condlists)
+        return changed_conditions
+
+    def getChangedConditionsWithAssignments(self, termname):
+        if not termname in self.resolved_binddict:
+            return {}
+        bindlist = self.resolved_binddict[termname]
+        termtype = self.getTermtype(termname)
+        tree = self.makeTree(termname)
+        funcdict = splitter.split(tree)
+        if len(funcdict) == 0:
+            return {}
+        changed_condfuncs = self.getChangedFuncdict(funcdict, termname)
+        changed_conditiondict = self.inferActiveConditionDict(changed_condfuncs)
+        return changed_conditiondict
+
+    def getUnchangedConditions(self, termname):
+        if not termname in self.resolved_binddict:
+            return ()
+        bindlist = self.resolved_binddict[termname]
+        termtype = self.getTermtype(termname)
+        tree = self.makeTree(termname)
+        funcdict = splitter.split(tree)
+        if len(funcdict) == 0:
+            return ()
+        unchanged_condlists = self.getUnchangedFuncdictKeys(funcdict, termname)
+        unchanged_conditions = self.inferActiveConditions(unchanged_condlists)
+        return unchanged_conditions
+
+    def makeConditionalTree(self, termname, step=0):
+        tree = self.makeTree(termname)
+        return tree
+
+    def getActiveFuncdictKeys(self, funcdict, op='>', conditionvalue=0):
+        activekeys = []
+        for _condlist, func in funcdict.items():
+            condlist = splitter.remove_reset_condlist(_condlist)
+            if isinstance(func, DFEvalValue):
+                e = eval('func.value' + op + str(conditionvalue))
+                if e:
+                    activekeys.append(condlist)
+        return activekeys
+
+    def getChangedFuncdictKeys(self, funcdict, termname):
+        changedkeys = []
+        for _condlist, func in funcdict.items():
+            condlist = splitter.remove_reset_condlist(_condlist)
+            if not (isinstance(func, DFTerminal) and func.name == termname):
+                changedkeys.append(condlist)
+        return changedkeys
+
+    def getUnchangedFuncdictKeys(self, funcdict, termname):
+        unchangedkeys = []
+        for _condlist, func in funcdict.items():
+            condlist = splitter.remove_reset_condlist(_condlist)
+            if isinstance(func, DFTerminal) and func.name == termname:
+                unchangedkeys.append(condlist)
+        return unchangedkeys
+
+    def getChangedFuncdict(self, funcdict, termname):
+        changeddict = {}
+        for _condlist, func in funcdict.items():
+            condlist = splitter.remove_reset_condlist(_condlist)
+            if not (isinstance(func, DFTerminal) and func.name == termname):
+                changeddict[condlist] = func
+        return changeddict
+
+    def inferActiveConditions(self, condlists):
+        active_conditions = []
+        for condlist in condlists:
+            l = self.inferActiveCondition(condlist)
+            if isinstance(l, ActiveTerm):
+                activecond = ActiveCondition()
+                activecond.set(l.name, l)
+                if not (activecond in active_conditions):
+                    active_conditions.append(activecond)
+            if isinstance(l, ActiveCondition):
+                l.resolve()
+                if len(l) > 0 and not (l in active_conditions):
+                    active_conditions.append(l)
+            if isinstance(l, ActiveConditionList):
+                for condition in l.conditions:
+                    condition.resolve()
+                    if not (condition in active_conditions):
+                        active_conditions.append(condition)
+        return tuple(active_conditions)
+
+    def inferActiveConditionDict(self, condfuncs):
+        active_conditions = {}
+        for condlist, func in condfuncs.items():
+            l = self.inferActiveCondition(condlist)
+            if isinstance(l, ActiveTerm):
+                if len(l.range_pairs) == 0:
+                    continue
+                activecond = ActiveCondition()
+                activecond.set(l.name, l)
+                if not (activecond in active_conditions):
+                    active_conditions[activecond] = func
+            if isinstance(l, ActiveCondition):
+                l.resolve()
+                if len(l) > 0 and not (l in active_conditions):
+                    active_conditions[l] = func
+            if isinstance(l, ActiveConditionList):
+                for condition in l.conditions:
+                    condition.resolve()
+                    if not (condition in active_conditions):
+                        active_conditions[condition] = func
+        return active_conditions
+
+    def inferActiveCondition(self, condlist):
+        condition = None
+        for cond in condlist:
+            walkrslt = self.walkActiveCond(cond)
+            if condition is None:
+                condition = walkrslt
+            else:
+                condition = self._activecond_opAnd(condition, walkrslt)
+        return condition
+
+    def walkActiveCond(self, cond):
+        if isinstance(cond, DFTerminal):
+            return self._walkActiveCond(DFOperator((cond, DFEvalValue(0)), 'GreaterThan'))
+        return self._walkActiveCond(cond)
+
+    def _walkActiveCond(self, cond):
+        if isinstance(cond, DFOperator):
+            if len(cond.nextnodes) == 1:
+                return self._walkActiveCond_DFOperator_unary(cond)
+            if len(cond.nextnodes) == 2:
+                return self._walkActiveCond_DFOperator_dual(cond)
+        return None
+
+    def _walkActiveCond_DFOperator_unary(self, cond):
+        activecond = self.walkActiveCond(cond.nextnodes[0])
+        if signaltype.isNot(cond.operator):
+            return self._activecond_opNot(activecond)
+        return None
+
+    def _walkActiveCond_DFOperator_dual(self, cond):
+        l = cond.nextnodes[0]
+        r = cond.nextnodes[1]
+
+        if signaltype.isOr(cond.operator):
+            lactivecond = self.walkActiveCond(l)
+            ractivecond = self.walkActiveCond(r)
+            if lactivecond is None and ractivecond is not None:
+                return ractivecond
+            if lactivecond is not None and ractivecond is None:
+                return lactivecond
+            return self._activecond_opOr(lactivecond, ractivecond)
+
+        if signaltype.isAnd(cond.operator):
+            lactivecond = self.walkActiveCond(l)
+            ractivecond = self.walkActiveCond(r)
+            if lactivecond is None and ractivecond is not None:
+                return ractivecond
+            if lactivecond is not None and ractivecond is None:
+                return lactivecond
+            return self._activecond_opAnd(lactivecond, ractivecond)
+
+        if isinstance(l, DFTerminal):
+            infval = inference.infer(cond.operator, r)
+            minval = 0
+            maxval = util.maxValue(self.getWidth(l.name))
+            range_pairs = ((infval.minval, infval.maxval),)
+            return ActiveTerm(l.name, range_pairs, minval, maxval)
+
+        if isinstance(r, DFTerminal):
+            new_op = re.sub('Greater', 'TMP', cond.operator)
+            new_op = re.sub('Less', 'Greater', new_op)
+            new_op = re.sub('TMP', 'Less', new_op)
+            infval = inference.infer(new_op, l)
+            minval = 0
+            maxval = util.maxValue(self.getWidth(r.name))
+            range_pairs = ((infval.minval, infval.maxval),)
+            return ActiveTerm(r.name, range_pairs, minval, maxval)
+
+        if cond.operator == 'Eq':
+            lactivecond = self.walkActiveCond(l)
+            ractivecond = self.walkActiveCond(r)
+            if lactivecond is not None and ractivecond is None and isinstance(r, DFEvalValue):
+                if r.value > 0:
+                    return lactivecond
+                return self._activecond_opNot(lactivecond)
+            if lactivecond is None and ractivecond is not None and isinstance(l, DFEvalValue):
+                if l.value > 0:
+                    return ractivecond
+                return self._activecond_opNot(ractivecond)
+            return self._activecond_opAnd(lactivecond, ractivecond)
+
+        if cond.operator == 'NotEq':
+            lactivecond = self.walkActiveCond(l)
+            ractivecond = self.walkActiveCond(r)
+            if lactivecond is not None and ractivecond is None and isinstance(r, DFEvalValue):
+                if r.value == 0:
+                    return lactivecond
+                return self._activecond_opNot(lactivecond)
+            if lactivecond is None and ractivecond is not None and isinstance(l, DFEvalValue):
+                if l.value == 0:
+                    return ractivecond
+                return self._activecond_opNot(ractivecond)
+            return None
+        return None
+
+    def _activecond_opNot(self, node):
+        if isinstance(node, ActiveTerm):
+            new_node = node
+            new_node.opNot()
+            return new_node
+        if isinstance(node, ActiveCondition):
+            activelist = []
+            for name, term in node.termdict.items():
+                new_term = term
+                new_term.opNot()
+                new_cond = ActiveCondition()
+                new_cond.set(name, new_term)
+                activelist.append(new_cond)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(node, ActiveConditionList):
+            activelist = []
+            now_appended = []
+            for cnt in range(len(node.conditions)):
+                if cnt == 0:
+                    continue
+                left = node.conditions[cnt - 1]
+                right = node.conditions[cnt]
+                if cnt == 1:
+                    for lname, lterm in left.termdict.items():
+                        not_lterm = lterm.opNot()
+                        for rname, rterm in right.termdict.items():
+                            not_rterm = rterm.opNot()
+                            r = self._activecond_opAnd(not_lterm, not_rterm)
+                            if r:
+                                now_appended.append(r)
+                    activelist.extend(now_appended)
+                else:
+                    left = ActiveConditionList(tuple(now_appended))
+                    now_appended = []
+                    for lcondition in left.conditions:
+                        for rname, rterm in right.termdict.items():
+                            not_rterm = rterm.opNot()
+                            r = self._activecond_opAnd(lcondition, not_rterm)
+                            if r:
+                                now_appended.append(r)
+                    activelist.extend(now_appended)
+            if len(activelist) > 0:
+                return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opAnd(self, left, right):
+        if isinstance(left, ActiveTerm):
+            return self._activecond_opAnd_right_term(left, right)
+        if isinstance(left, ActiveCondition):
+            return self._activecond_opAnd_right_condition(left, right)
+        if isinstance(left, ActiveConditionList):
+            return self._activecond_opAnd_right_conditionlist(left, right)
+        return None
+
+    def _activecond_opAnd_right_term(self, left, right):
+        if isinstance(right, ActiveTerm):
+            new_cond = ActiveCondition()
+            new_cond.set(left.name, left)
+            new_cond.set(right.name, right)
+            return new_cond
+        if isinstance(right, ActiveCondition):
+            new_cond = ActiveCondition()
+            new_cond.set(left.name, left)
+            for name, term in right.termdict.items():
+                new_cond.set(name, term)
+            return new_cond
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            for condition in right.conditions:
+                new_condition = condition
+                new_condition.set(left.name, left)
+                activelist.append(new_condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opAnd_right_condition(self, left, right):
+        if isinstance(right, ActiveTerm):
+            new_cond = ActiveCondition()
+            for name, term in left.termdict.items():
+                new_cond.set(name, term)
+            new_cond.set(right.name, right)
+            return new_cond
+        if isinstance(right, ActiveCondition):
+            new_cond = ActiveCondition()
+            for name, term in left.termdict.items():
+                new_cond.set(name, term)
+            for name, term in right.termdict.items():
+                new_cond.set(name, term)
+            return new_cond
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            for condition in right.conditions:
+                new_condition = self._activecond_opAnd_right_condition(left, condition)
+                activelist.append(new_condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opAnd_right_conditionlist(self, left, right):
+        if isinstance(right, ActiveTerm):
+            activelist = []
+            for condition in left.conditions:
+                new_condition = condition
+                new_condition.set(right.name, right)
+                activelist.append(new_condition)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveCondition):
+            activelist = []
+            for condition in left.conditions:
+                new_condition = self._activecond_opAnd_right_condition(condition, right)
+                activelist.append(new_condition)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            for rcondition in right.conditions:
+                for condition in left.conditions:
+                    new_condition = self._activecond_opAnd_right_condition(condition, rcondition)
+                    activelist.append(new_condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opOr(self, left, right):
+        if isinstance(left, ActiveTerm):
+            return self._activecond_opOr_right_term(left, right)
+        if isinstance(left, ActiveCondition):
+            return self._activecond_opOr_right_condition(left, right)
+        if isinstance(left, ActiveConditionList):
+            return self._activecond_opOr_right_conditionlist(left, right)
+        return None
+
+    def _activecond_opOr_right_term(self, left, right):
+        if isinstance(right, ActiveTerm):
+            activelist = []
+            lactivecond = ActiveCondition()
+            lactivecond.set(left.name, left)
+            activelist.append(lactivecond)
+            ractivecond = ActiveCondition()
+            ractivecond.set(right.name, right)
+            activelist.append(ractivecond)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveCondition):
+            activelist = []
+            lactivecond = ActiveCondition()
+            lactivecond.set(left.name, left)
+            activelist.append(lactivecond)
+            activelist.append(right)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            lactivecond = ActiveCondition()
+            lactivecond.set(left.name, left)
+            activelist.append(lactivecond)
+            for condition in right.conditions:
+                activelist.append(condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opOr_right_condition(self, left, right):
+        if isinstance(right, ActiveTerm):
+            activelist = []
+            activelist.append(left)
+            ractivecond = ActiveCondition()
+            ractivecond.set(right.name, right)
+            activelist.append(ractivecond)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveCondition):
+            activelist = []
+            activelist.append(left)
+            activelist.append(right)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            activelist.append(left)
+            for condition in right.conditions:
+                activelist.append(condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+    def _activecond_opOr_right_conditionlist(self, left, right):
+        if isinstance(right, ActiveTerm):
+            activelist = []
+            for condition in left.conditions:
+                activelist.append(condition)
+            ractivecond = ActiveCondition()
+            ractivecond.set(right.name, right)
+            activelist.append(ractivecond)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveCondition):
+            activelist = []
+            for condition in left.conditions:
+                activelist.append(condition)
+            activelist.append(right)
+            return ActiveConditionList(tuple(activelist))
+        if isinstance(right, ActiveConditionList):
+            activelist = []
+            for condition in left.conditions:
+                activelist.append(condition)
+            for condition in right.conditions:
+                activelist.append(condition)
+            return ActiveConditionList(tuple(activelist))
+        return None
+
+
+class ActiveTerm(object):
+    def __init__(self, name, range_pairs=(), minval=0, maxval=0):
+        self.name = name
+        self.range_pairs = range_pairs
+        self.minval = minval
+        self.maxval = maxval
+
+    def set(self, range_pairs):
+        self.range_pairs = range_pairs
+
+    def __eq__(self, o):
+        return self.name == o.name and self.range_pairs == o.range_pairs and self.minval == o.minval and self.maxval == o.maxval
+
+    def opNot(self):
+        if len(self.range_pairs) > 0:
+            self._inv_range_pairs()
+
+    def _inv_range_pairs(self):
+        new_range_pairs = []
+        cur_min = self.minval
+        for rmin, rmax in sorted(self.range_pairs, key=lambda x: x[0]):
+            if rmax is None:
+                rmax = self.maxval
+            if rmin - 1 >= cur_min:
+                new_range_pairs.append((cur_min, rmin - 1))
+            cur_min = max(rmax + 1, cur_min)
+        if cur_min <= self.maxval:
+            new_range_pairs.append((cur_min, self.maxval))
+        self.range_pairs = tuple(new_range_pairs)
+
+    def __repr__(self):
+        ret = '('
+        ret += util.toFlatname(self.name) + ' '
+        for rmin, rmax in self.range_pairs:
+            ret += str(rmin) + ':' + str(rmax) + ', '
+        ret = ret[:-2]
+        ret += ')'
+        return ret
+
+    def tocode(self):
+        ret = '('
+        for rmin, rmax in self.range_pairs:
+            ret += '('
+            ret += str(rmin) + '<=' + util.toFlatname(self.name)
+            if rmax is not None:
+                ret += '&&'
+                ret += util.toFlatname(self.name) + '<=' + str(rmax)
+            ret += ')'
+            ret += '||'
+        return ret[:-2] + ')'
+
+    def toTree(self):
+        retnode = None
+        for rmin, rmax in self.range_pairs:
+            if rmax is None:
+                t = DFOperator((DFEvalValue(rmin), DFTerminal(self.name)), 'LessEq')
+                if retnode is None:
+                    retnode = t
+                else:
+                    retnode = DFOperator((retnode, t), 'Lor')
+            else:
+                t = DFOperator((DFOperator((DFEvalValue(rmin), DFTerminal(self.name)), 'LessEq'), DFOperator(
+                    (DFTerminal(self.name), DFEvalValue(rmax)), 'GreaterEq')), 'Land')
+                if retnode is None:
+                    retnode = t
+                else:
+                    retnode = DFOperator((retnode, t), 'Lor')
+        return retnode
+
+    def include(self, termname):
+        if termname == self.name:
+            return True
+        return False
+
+    def satisfy(self, value):
+        for rmin, rmax in sorted(self.range_pairs, key=lambda x: x[0]):
+            if rmin <= value and value <= rmax:
+                return True
+        return False
+
+
+class ActiveCondition(object):
+    def __init__(self):
+        self.termdict = {}
+
+    def has(self, name):
+        return name in self.termdict
+
+    def set(self, name, term):
+        if not self.has(name):
+            self.termdict[name] = term
+            return
+        self._andTerm(name, term)
+
+    def empty(self):
+        return len(self.termdict) == 0
+
+    def resolve(self):
+        new_termdict = {}
+        for name, term in self.termdict.items():
+            if len(term.range_pairs) == 0:
+                continue
+            new_termdict[name] = term
+        self.termdict = new_termdict
+
+    def tocode(self):
+        if len(self.termdict) == 0:
+            return '1'
+        ret = '('
+        for name, term in self.termdict.items():
+            ret += term.tocode()
+            ret += '&&'
+        return ret[:-2] + ')'
+
+    def toTree(self):
+        if len(self.termdict) == 0:
+            return DFEvalValue(1)
+        retnode = None
+        for name, term in self.termdict.items():
+            t = term.toTree()
+            if retnode is None:
+                retnode = t
+            else:
+                retnode = DFOperator((retnode, t), 'Land')
+        return retnode
+
+    def __repr__(self):
+        if len(self.termdict) == 0:
+            return '(empty)'
+        ret = '('
+        for name, term in sorted(self.termdict.items(), key=lambda x: str(x[0])):
+            ret += term.__repr__() + ' && '
+        ret = ret[:-4] + ')'
+        return ret
+
+    def __len__(self):
+        return len(self.termdict)
+
+    def _andTerm(self, name, term):
+        current_term = self.termdict[name]
+        new_range_pairs = self._and_range_pairs(current_term, term)
+        self.termdict[name].set(new_range_pairs)
+
+    def _and_range_pairs(self, sna, snb):
+        range_pairs = []
+        a_ptr = 0
+        b_ptr = 0
+        sorted_sna = sorted(sna.range_pairs, key=lambda x: x[0])
+        sorted_snb = sorted(snb.range_pairs, key=lambda x: x[0])
+        if len(sorted_sna) == 0:
+            return ()
+        if len(sorted_snb) == 0:
+            return ()
+        amin, amax = sorted_sna[a_ptr]
+        bmin, bmax = sorted_snb[b_ptr]
+        last_a_ptr = -1
+        last_b_ptr = -1
+        while True:
+            next_min = max(amin, bmin)
+            next_max = min(amax, bmax)
+            if bmax < amin or bmin > amax:
+                pass
+            else:
+                range_pairs.append((next_min, next_max))
+            if amax >= bmax and b_ptr < len(sorted_snb) - 1:
+                b_ptr += 1
+                bmin, bmax = sorted_snb[b_ptr]
+            elif amax <= bmax and a_ptr < len(sorted_sna) - 1:
+                a_ptr += 1
+                amin, amax = sorted_sna[a_ptr]
+            if a_ptr == last_a_ptr and b_ptr == last_b_ptr:
+                break
+            last_a_ptr = a_ptr
+            last_b_ptr = b_ptr
+        ret_set = set(range_pairs)
+        ret_list = tuple(ret_set)
+        return ret_list
+
+    def include(self, termname):
+        for name, term in self.termdict.items():
+            if term.include(termname):
+                return True
+        return False
+
+    def split(self, termname):
+        termdict_including = {}
+        termdict_excluding = {}
+        for name, term in self.termdict.items():
+            if term.include(termname):
+                termdict_including[name] = term
+            else:
+                termdict_excluding[name] = term
+        including = ActiveCondition()
+        including.termdict = termdict_including
+        excluding = ActiveCondition()
+        excluding.termdict = termdict_excluding
+        return including, excluding
+
+    def satisfy(self, valuedict):
+        for termname, value in valuedict.items():
+            if not termname in self.termdict:
+                continue
+            if not self.termdict[termname].satisfy(value):
+                return False
+        return True
+
+
+class ActiveConditionList(object):
+    def __init__(self, conditions=()):
+        self.conditions = conditions
+
+    def __len__(self):
+        return len(self.conditions)
+
+    def __repr__(self):
+        ret = ''
+        for c in self.conditions:
+            ret += c.__repr__() + ' || '
+        ret = ret[:-4] + ''
+        return ret
+
+    def andterm(self, name, term):
+        if len(self.conditions) == 0:
+            self.conditions = (term,)
+        else:
+            for condition in self.conditions:
+                condition.set(name, term)
+
+    def include(self, termname):
+        for condition in self.conditions:
+            if condition.include(termname):
+                return True
+        return False
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/controlflow_analyzer.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/controlflow_analyzer.py
new file mode 100644
index 0000000..0ebae8a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/controlflow_analyzer.py
@@ -0,0 +1,304 @@
+# -------------------------------------------------------------------------------
+# controlflow_analyzer.py
+#
+# Controlflow analyzer
+#
+# for visualization, graphviz and pygraphviz are required
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.utils.util as util
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.dataflow.reorder as reorder
+import pyverilog.dataflow.replace as replace
+from pyverilog.dataflow.subset import VerilogSubset
+from pyverilog.dataflow.walker import VerilogDataflowWalker
+from pyverilog.dataflow.dataflow import *
+import pyverilog.controlflow.splitter as splitter
+import pyverilog.controlflow.transition as transition
+
+
+class VerilogControlflowAnalyzer(VerilogSubset):
+    def __init__(self, topmodule, terms, binddict,
+                 resolved_terms, resolved_binddict,
+                 constlist, fsm_vars=('fsm', 'state', 'count', 'cnt', 'step', 'mode')):
+        VerilogSubset.__init__(self, topmodule, terms, binddict,
+                               resolved_terms, resolved_binddict, constlist)
+        self.treewalker = VerilogDataflowWalker(topmodule, terms, binddict,
+                                                resolved_terms, resolved_binddict, constlist)
+        self.fsm_vars = fsm_vars
+
+    def getLoops(self):
+        fsms = self.getFiniteStateMachines()
+        loops = {}
+        for signame, fsm in fsms.items():
+            loop_set = fsm.get_loop()
+            if len(loop_set) == 0:
+                continue
+            if not signame in loops:
+                loops[signame] = set([])
+            loops[signame].update(loop_set)
+        return loops, fsms
+
+    def getFiniteStateMachines(self):
+        statemachines = {}
+        for termname, bindlist in self.resolved_binddict.items():
+            if not self.isFsmVar(termname):
+                continue
+            funcdict, delaycnt = self.getFuncdict(termname)
+            if len(funcdict) > 0:
+                print("FSM signal: %s, Condition list length: %d" % (str(termname), len(funcdict)))
+            fsm = self.getFiniteStateMachine(termname, funcdict)
+            if fsm.size() > 0:
+                fsm.set_delaycnt(delaycnt)
+                fsm.resolve(self.optimizer)
+                statemachines[termname] = fsm
+        return statemachines
+
+    def getFiniteStateMachine(self, termname, funcdict):
+        fsm = FiniteStateMachine(util.toFlatname(termname))
+        if len(funcdict) == 0:
+            return fsm
+        width = self.getWidth(termname)
+        for condlist, func in sorted(funcdict.items(), key=lambda x: len(x[0])):
+            if not isinstance(func, DFEvalValue):
+                continue
+            print("Condition: %s, Inferring transition condition" % str(condlist))
+            node = transition.walkCondlist(condlist, termname, width)
+            if node is None:
+                continue
+            statenode_list = node.nodelist if isinstance(
+                node, transition.StateNodeList) else [node, ]
+            for statenode in statenode_list:
+                fsm.construct(func.value, statenode)
+        return fsm
+
+    def getFuncdict(self, termname, delaycnt=0):
+        termtype = self.getTermtype(termname)
+        if not self.isClockEdge(termname):
+            return {}, 0
+        if signaltype.isRename(termtype):
+            return {}, 0
+        tree = self.makeTree(termname)
+        funcdict = splitter.split(tree)
+        funcdict = splitter.remove_reset_condition(funcdict)
+        if len(funcdict) == 1 and len(list(funcdict.keys())[0]) == 0:
+            next_term = list(funcdict.values())[0]
+            if isinstance(next_term, DFTerminal):
+                return self.getFuncdict(next_term.name, delaycnt + 1)
+        return funcdict, delaycnt
+
+    def isFsmVar(self, termname):
+        for v in self.fsm_vars:
+            if re.search(v.lower(), str(termname).lower()):
+                return True
+        return False
+
+    def getWidth(self, termname):
+        term = self.getTerm(termname)
+        msb = self.optimizer.optimizeConstant(term.msb)
+        lsb = self.optimizer.optimizeConstant(term.lsb)
+        width = DFIntConst('32')
+        if msb is not None and lsb is not None:
+            return abs(self.optimizer.optimizeConstant(DFOperator((msb, lsb), 'Minus')).value) + 1
+        return self.optimizer.optimizeConstant(width).value
+
+    def makeTree(self, termname):
+        tree = self.getTree(termname)
+        tree = self.treewalker.walkTree(tree)
+        tree = reorder.reorder(tree)
+        tree = self.optimizer.optimize(tree)
+        tree = replace.replaceUndefined(tree, termname)
+        return tree
+
+
+class FiniteStateMachine(object):
+    def __init__(self, name):
+        self.name = name
+        self.fsm = {}  # key:src, value: dict[cond]=dst
+        self.any = {}  # key:cond, value:dst
+        self.delaycnt = 0
+
+    def set_delaycnt(self, delaycnt):
+        self.delaycnt = delaycnt
+
+    def size(self):
+        dstlen = 0
+        for src, dstdict in self.fsm.items():
+            dstlen += len(dstdict)
+        srcs = self.fsm.keys()
+        dstlen += len(srcs) * len(self.any)
+        return dstlen
+
+    def label_range(self):
+        minval = None
+        maxval = None
+        for src, dstdict in self.fsm.items():
+            if minval is None:
+                minval = src
+            elif src < minval:
+                minval = src
+            if maxval is None:
+                maxval = src
+            elif src > maxval:
+                maxval = src
+            for cond, dst in dstdict.items():
+                if minval is None:
+                    minval = dst
+                elif dst < minval:
+                    minval = dst
+                if maxval is None:
+                    maxval = dst
+                elif dst > maxval:
+                    maxval = dst
+        return (minval, maxval)
+
+    def construct(self, dst, node):
+        if node is None:
+            return
+        if node.isany:
+            transcond = node.transcond
+            self.add_any(dst, transcond)
+        for rp in node.range_pairs:
+            transcond = node.transcond
+            self.add(rp, dst, transcond)
+
+    def add_any(self, dst, cond):
+        self.any[cond] = dst
+
+    def add(self, srcs, dst, cond):
+        sb, se = srcs
+        for src in range(sb, se + 1):
+            if not src in self.fsm:
+                self.fsm[src] = {}
+            self.fsm[src][cond] = dst
+
+    def resolve(self, evaluate):
+        new_fsm = {}
+        for src, dstdict in sorted(self.fsm.items(), key=lambda x: x[0]):
+            dst_cond_dict = {}
+            for cond, dst in sorted(dstdict.items(), key=lambda x: x[1]):
+                if not dst in dst_cond_dict:
+                    dst_cond_dict[dst] = cond
+                else:
+                    cur_cond = dst_cond_dict[dst]
+                    if cur_cond is None:
+                        pass
+                    elif cond is None:
+                        dst_cond_dict[dst] = None
+                    else:
+                        dst_cond_dict[dst] = evaluate.optimize(DFOperator((cur_cond, cond), 'Lor'))
+            new_dstdict = {}
+            for dst, cond in dst_cond_dict.items():
+                if isinstance(cond, DFEvalValue) and cond.value > 0:
+                    new_dstdict[None] = dst
+                else:
+                    new_dstdict[cond] = dst
+            new_fsm[src] = new_dstdict
+        self.fsm = new_fsm
+
+    def view(self):
+        for cond, dst in self.any.items():
+            s = []
+            s.append('any -- ')
+            if cond is not None:
+                s.append(cond.tocode())
+            else:
+                s.append('None')
+            s.append('--> %d' % dst)
+            print(''.join(s))
+        for src, dstdict in self.fsm.items():
+            for cond, dst in dstdict.items():
+                s = []
+                s.append('%d --' % src)
+                if cond is not None:
+                    s.append(cond.tocode())
+                else:
+                    s.append('None')
+                s.append('--> %d' % dst)
+                print(''.join(s))
+
+    def tograph(self, filename='fsm.png', nolabel=False):
+        import pygraphviz as pgv
+        #graph = pgv.AGraph(strict=False, directed=True)
+        graph = pgv.AGraph(directed=True)
+        for src, dstdict in self.fsm.items():
+            graph.add_node(str(src), label=str(src))
+            for cond, dst in dstdict.items():
+                graph.add_node(str(dst), label=str(dst))
+                if nolabel:
+                    graph.add_edge(str(src), str(dst), label='')
+                else:
+                    graph.add_edge(str(src), str(dst), label=str(cond))
+        srcs = self.fsm.keys()
+        for src in srcs:
+            for cond, dst in self.any.items():
+                graph.add_node(str(dst), label=str(dst))
+                if nolabel:
+                    graph.add_edge(str(src), str(dst), label='')
+                else:
+                    graph.add_edge(str(src), str(dst), label=str(cond))
+
+        graph.write('file.dot')
+        graph.layout(prog='dot')
+        graph.draw(filename)
+
+    def get_loop(self):
+        loops = set([])
+        loop_node_cnt = {}
+        for k in sorted(self.fsm.keys()):
+            if not k in self.fsm:
+                continue
+            if not k in loop_node_cnt:
+                loop_node_cnt[k] = 0
+            if loop_node_cnt[k] >= len(self.fsm[k].values()):
+                continue
+            paths = self.get_looppath(k)
+            for path in paths:
+                rotated = self.rotate(path)
+                if rotated not in loops:
+                    loops.add(rotated)
+                    for r in rotated:
+                        if not r in loop_node_cnt:
+                            loop_node_cnt[r] = 0
+                        loop_node_cnt[r] += 1
+        return loops
+
+    def rotate(self, path):
+        minval = min(path)
+        minval_pos = path.index(minval)
+        return path[minval_pos:] + path[:minval_pos]
+
+    def get_looppath(self, src):
+        paths = set([])
+        if not src in self.fsm:
+            return paths
+        nextnodes = set(self.fsm[src].values())
+        for n in nextnodes:
+            r = self._looppath(src, n, visited=set([n]))
+            if len(r) > 0:
+                paths |= r
+        return paths
+
+    def _looppath(self, src, node, visited, cnt=0):
+        paths = set([])
+        if cnt > 50:
+            return paths
+        if src == node:
+            paths.add((src,))
+            return paths
+        if not node in self.fsm:
+            return paths
+        nextnodes = set(self.fsm[node].values()) - visited
+        for n in nextnodes:
+            r = self._looppath(src, n, visited=visited | set([node]), cnt=cnt + 1)
+            if len(r) > 0:
+                for np in r:
+                    paths.add((node,) + np)
+        return paths
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/splitter.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/splitter.py
new file mode 100644
index 0000000..c2ad643
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/splitter.py
@@ -0,0 +1,92 @@
+# -------------------------------------------------------------------------------
+# splitter.py
+#
+# Splitting a definition tree into condition part and function part
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.utils.signaltype as signaltype
+from pyverilog.dataflow.dataflow import *
+
+
+def split(tree):
+    funcdict = {}  # key:condition list, value:function
+    if isinstance(tree, DFBranch):
+        truefuncs = split(tree.truenode)
+        truecond = tree.condnode
+        if len(truefuncs) > 0:
+            for cond, func in truefuncs.items():
+                funcdict[(truecond,) + cond] = func
+        else:
+            if tree.truenode is not None:
+                funcdict[(truecond,)] = tree.truenode
+        falsefuncs = split(tree.falsenode)
+        falsecond = DFOperator((tree.condnode,), 'Ulnot')
+        if len(falsefuncs) > 0:
+            for cond, func in falsefuncs.items():
+                funcdict[(falsecond,) + cond] = func
+        else:
+            if tree.falsenode is not None:
+                funcdict[(falsecond,)] = tree.falsenode
+    return funcdict
+
+
+def remove_reset_condition(funcdict):
+    new_funcdict = {}
+    for _condlist, func in funcdict.items():
+        condlist = remove_reset_condlist(_condlist)
+        new_funcdict[condlist] = func
+    if () in new_funcdict and len(new_funcdict) > 1:
+        del new_funcdict[()]
+    return new_funcdict
+
+
+def remove_reset_condlist(condlist):
+    new_condlist = []
+    for cond in condlist:
+        r = _remove_reset_cond(cond)
+        if r:
+            new_condlist.append(r)
+    return tuple(new_condlist)
+
+
+def _remove_reset_cond(cond):
+    condstr = cond.tostr()
+    if signaltype.isReset(condstr):
+        return None
+    return cond
+
+
+def active_constant(termname, node, op='>', value=0):
+    if not isinstance(node, DFEvalValue):
+        return False
+    if not eval(str(node.value) + op + str(value)):
+        return False
+    return True
+
+
+def active_modify(termname, node):
+    if isinstance(node, DFTerminal) and node.name == termname:
+        return False
+    return True
+
+
+def active_unmodify(termname, node):
+    if isinstance(node, DFTerminal) and node.name == termname:
+        return True
+    return False
+
+
+def filter(funcdict, termname, condition=active_constant):
+    ret_funcdict = {}
+    for condlist, func in funcdict.items():
+        if not condition(termname, func):
+            continue
+        ret_funcdict[condlist] = func
+    return ret_funcdict
diff --git a/venv/lib/python3.9/site-packages/pyverilog/controlflow/transition.py b/venv/lib/python3.9/site-packages/pyverilog/controlflow/transition.py
new file mode 100644
index 0000000..084c113
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/controlflow/transition.py
@@ -0,0 +1,322 @@
+# -------------------------------------------------------------------------------
+# transition.py
+#
+# Splitting a tree into state part and transition condition part
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.dataflow.dataflow import *
+import pyverilog.utils.util as util
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.utils.inference as inference
+
+
+def walkCondlist(condlist, termname, termwidth=32):
+    node = None
+    if len(condlist) == 0:
+        maxvalue = util.maxValue(termwidth)
+        return StateNode(maxvalue=maxvalue, isany=True)
+    for cond in condlist:
+        rslt = walkCond(cond, termname, termwidth)
+        if node and rslt:
+            node = andStateNodeList(node, rslt)
+        elif rslt:
+            node = rslt
+    return node
+
+
+def walkCond(cond, termname, termwidth=32):
+    if isinstance(cond, DFOperator):
+        if len(cond.nextnodes) == 1:
+            return _walkCond_DFOperator_unary(cond, termname, termwidth)
+        if len(cond.nextnodes) == 2:
+            return _walkCond_DFOperator_dual(cond, termname, termwidth)
+    if isinstance(cond, DFTerminal):
+        comp_cond = DFOperator((cond, DFEvalValue(0)), 'GreaterThan')
+        return _walkCond_DFOperator_dual(comp_cond, termname, termwidth)
+    maxvalue = util.maxValue(termwidth)
+    return StateNode(transcond=cond, maxvalue=maxvalue, isany=True)
+
+
+def _walkCond_DFOperator_unary(cond, termname, termwidth=32):
+    node = walkCond(cond.nextnodes[0], termname, termwidth)
+    if signaltype.isNot(cond.operator):
+        node = notStateNodeList(node)
+    return node
+
+
+def _walkCond_DFOperator_dual(cond, termname, termwidth=32):
+    maxvalue = util.maxValue(termwidth)
+    if signaltype.isNonConditionOp(cond.operator):
+        return StateNode(transcond=cond, maxvalue=maxvalue, isany=True)
+
+    if not signaltype.isCompare(cond.operator) and signaltype.isOr(cond.operator):
+        lnode = walkCond(cond.nextnodes[0], termname, termwidth)
+        rnode = walkCond(cond.nextnodes[1], termname, termwidth)
+        ret = orStateNodeList(lnode, rnode)
+        if ret:
+            return ret
+    if not signaltype.isCompare(cond.operator) and signaltype.isAnd(cond.operator):
+        lnode = walkCond(cond.nextnodes[0], termname, termwidth)
+        rnode = walkCond(cond.nextnodes[1], termname, termwidth)
+        ret = andStateNodeList(lnode, rnode)
+        if ret:
+            return ret
+
+    l = cond.nextnodes[0]
+    r = cond.nextnodes[1]
+
+    if isinstance(l, DFTerminal) and l.name == termname:
+        infval = inference.infer(cond.operator, r)
+        return createStateNode(infval, termwidth)
+    if isinstance(r, DFTerminal) and r.name == termname:
+        new_op = re.sub('Greater', 'TMP', cond.operator)
+        new_op = re.sub('Less', 'Greater', new_op)
+        new_op = re.sub('TMP', 'Less', new_op)
+        infval = inference.infer(new_op, l)
+        return createStateNode(infval, termwidth)
+
+    maxvalue = util.maxValue(termwidth)
+    return StateNode(transcond=cond, maxvalue=maxvalue, isany=True)
+
+
+def notStateNodeList(node):
+    if isStateNode(node):
+        return notStateNode(node)
+    if isStateNodeList(node):
+        new_nodes = []
+        for n in node.nodelist:
+            new_nodes.append(notStateNode(n))
+        ret_node = None
+        for n in new_nodes:
+            if ret_node is None:
+                ret_node = n
+            else:
+                ret_node = andStateNodeList(ret_node, n)
+        return ret_node
+    return None
+
+
+def orStateNodeList(lnode, rnode):
+    if isStateNode(lnode) and isStateNode(rnode):
+        return StateNodeList((lnode, rnode))
+    if isStateNodeList(lnode) and isStateNodeList(rnode):
+        new_list = []
+        new_list.extend(lnode.nodelist)
+        new_list.extend(rnode.nodelist)
+        return StateNodeList(tuple(new_list))
+    if isStateNodeList(lnode) and isStateNode(rnode):
+        new_list = []
+        new_list.extend(lnode.nodelist)
+        new_list.append(rnode)
+        return StateNodeList(tuple(new_list))
+    if isStateNode(lnode) and isStateNodeList(rnode):
+        new_list = []
+        new_list.append(lnode)
+        new_list.extend(rnode.nodelist)
+        return StateNodeList(tuple(new_list))
+    return None
+
+
+def andStateNodeList(lnode, rnode):
+    if lnode is None and rnode is None:
+        return None
+    if lnode is None:
+        return rnode
+    if rnode is None:
+        return lnode
+
+    if isStateNode(lnode) and isStateNode(rnode):
+        return andStateNode(lnode, rnode)
+    if isStateNodeList(lnode) and isStateNodeList(rnode):
+        new_list = []
+        for l in lnode.nodelist:
+            for r in rnode.nodelist:
+                val = andStateNode(l, r)
+                if val:
+                    new_list.append(val)
+        if len(new_list) == 0:
+            return None
+        return StateNodeList(tuple(new_list))
+    if isStateNodeList(lnode) and isStateNode(rnode):
+        new_list = []
+        for l in lnode.nodelist:
+            val = andStateNode(l, rnode)
+            if val:
+                new_list.append(val)
+        if len(new_list) == 0:
+            return None
+        return StateNodeList(tuple(new_list))
+    if isStateNode(lnode) and isStateNodeList(rnode):
+        new_list = []
+        for r in rnode.nodelist:
+            val = andStateNode(lnode, r)
+            if val:
+                new_list.append(val)
+        if len(new_list) == 0:
+            return None
+        return StateNodeList(tuple(new_list))
+    return None
+
+
+def notStateNode(node):
+    if node.isany:
+        new_transcond = _not_transcond(node.transcond)
+        return StateNode(transcond=new_transcond, maxvalue=node.maxvalue, isany=True)
+    new_range_pairs = _not_range_pairs(node)
+    a = StateNode(range_pairs=new_range_pairs, maxvalue=node.maxvalue)
+    if node.transcond is None:
+        return a
+    new_transcond = _not_transcond(node.transcond)
+    b = StateNode(range_pairs=node.range_pairs, transcond=new_transcond, maxvalue=node.maxvalue)
+    return StateNodeList((a, b))
+
+
+def andStateNode(sna, snb):
+    if sna is None and snb is None:
+        return None
+    if sna is None:
+        return snb
+    if snb is None:
+        return sna
+
+    isany = False
+    range_pairs = []
+    if sna.isany and snb.isany:
+        isany = True
+    elif sna.isany:
+        range_pairs = snb.range_pairs
+    elif snb.isany:
+        range_pairs = sna.range_pairs
+    elif len(sna.range_pairs) > 0 and len(snb.range_pairs) > 0:
+        range_pairs = _and_range_pairs(sna, snb)
+
+    if (not isany) and len(range_pairs) == 0:
+        return None
+
+    transcond = None
+    if isinstance(sna.transcond, DFNode) and isinstance(snb.transcond, DFNode):
+        transcond = DFOperator((sna.transcond, snb.transcond), 'Land')
+    elif isinstance(sna.transcond, DFNode):
+        transcond = sna.transcond
+    elif isinstance(snb.transcond, DFNode):
+        transcond = snb.transcond
+
+    maxvalue = max(sna.maxvalue, snb.maxvalue)
+    return StateNode(tuple(range_pairs), maxvalue=maxvalue, transcond=transcond, isany=isany)
+
+
+def _and_range_pairs(sna, snb):
+    range_pairs = []
+    a_ptr = 0
+    b_ptr = 0
+    sorted_sna = sorted(sna.range_pairs, key=lambda x: x[0])
+    sorted_snb = sorted(snb.range_pairs, key=lambda x: x[0])
+    amin, amax = sorted_sna[a_ptr]
+    bmin, bmax = sorted_snb[b_ptr]
+    last_a_ptr = -1
+    last_b_ptr = -1
+    while True:
+        next_min = max(amin, bmin)
+        next_max = min(amax, bmax)
+        if bmax < amin or bmin > amax:
+            pass
+        else:
+            range_pairs.append((next_min, next_max))
+        if amax >= bmax and b_ptr < len(sorted_snb) - 1:
+            b_ptr += 1
+            bmin, bmax = sorted_snb[b_ptr]
+        elif amax <= bmax and a_ptr < len(sorted_sna) - 1:
+            a_ptr += 1
+            amin, amax = sorted_sna[a_ptr]
+        if a_ptr == last_a_ptr and b_ptr == last_b_ptr:
+            break
+        last_a_ptr = a_ptr
+        last_b_ptr = b_ptr
+    ret_set = set(range_pairs)
+    ret_list = list(ret_set)
+    return ret_list
+
+
+def _not_range_pairs(node):
+    new_range_pairs = []
+    cur_min = node.minvalue
+    for rmin, rmax in sorted(node.range_pairs, key=lambda x: x[0]):
+        if rmin - 1 >= cur_min:
+            new_range_pairs.append((cur_min, rmin - 1))
+        cur_min = max(rmax + 1, cur_min)
+    if cur_min <= node.maxvalue:
+        new_range_pairs.append((cur_min, node.maxvalue))
+    return new_range_pairs
+
+
+def _not_transcond(transcond):
+    if transcond is None:
+        return None
+    elif isinstance(transcond, DFOperator) and transcond.operator == 'Ulnot':
+        return transcond.nextnodes[0]
+    elif isinstance(transcond, DFOperator) and transcond.operator == 'Unot':
+        return transcond.nextnodes[0]
+    return DFOperator((transcond,), 'Ulnot')
+
+
+def createStateNode(infval, width):
+    statelabels = []
+    minval = infval.minval
+    maxval = infval.maxval
+    if minval is None:
+        minval = 0
+    if maxval is None:
+        maxval = util.maxValue(width)
+    ret = StateNode(((minval, maxval),), 0, util.maxValue(width), None)
+    if infval.inv:
+        ret = notStateNodeList(ret)
+    return ret
+
+
+def isStateNode(node):
+    return isinstance(node, StateNode)
+
+
+def isStateNodeList(node):
+    return isinstance(node, StateNodeList)
+
+
+class StateNode(object):
+    def __init__(self, range_pairs=(), minvalue=0, maxvalue=0, transcond=None, isany=False):
+        self.range_pairs = range_pairs
+        self.minvalue = minvalue
+        self.maxvalue = maxvalue
+        self.transcond = transcond
+        self.isany = isany
+
+    def __repr__(self):
+        ret = 'state:'
+        for r in self.range_pairs:
+            ret += str(r) + ' '
+        if self.isany:
+            ret += 'any '
+        ret = ret[:-1]
+        ret += ', cond:'
+        if isinstance(self.transcond, DFNode):
+            ret += self.transcond.tocode()
+        else:
+            ret += str(self.transcond)
+        return ret
+
+
+class StateNodeList(object):
+    def __init__(self, nodelist=()):
+        self.nodelist = nodelist
+
+    def __repr__(self):
+        ret = '('
+        for n in self.nodelist:
+            ret += n.__repr__() + ' '
+        return ret[:-1] + ')'
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@@ -0,0 +1,1572 @@
+# -------------------------------------------------------------------------------
+# bindvisitor.py
+#
+# Binding visitor
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# Contributor: ryosuke fukatani
+# -------------------------------------------------------------------------------
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import re
+
+from pyverilog.vparser.ast import *
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+import pyverilog.utils.signaltype as signaltype
+from pyverilog.utils.scope import ScopeLabel, ScopeChain
+from pyverilog.dataflow.dataflow import *
+from pyverilog.dataflow.visit import *
+from pyverilog.dataflow.optimizer import VerilogOptimizer
+import pyverilog.dataflow.reorder as reorder
+import pyverilog.dataflow.replace as replace
+
+
+class BindVisitor(NodeVisitor):
+    def __init__(self, moduleinfotable, top, frames, noreorder=False):
+        self.moduleinfotable = moduleinfotable
+        self.top = top
+        self.frames = frames
+        self.labels = Labels()
+        self.dataflow = DataFlow()
+        self.optimizer = VerilogOptimizer({}, {})
+
+        self.noreorder = noreorder
+
+        # set the top frame of top module
+        self.frames.setCurrent(ScopeChain())
+        self.stackInstanceFrame(top, top)
+
+        self.copyAllFrameInfo()
+
+        current = self.frames.getCurrent()
+        self.copyFrameInfo(current)
+
+        self.renamecnt = 0
+        self.default_nettype = 'wire'
+
+    def getDataflows(self):
+        return self.dataflow
+
+    def getFrameTable(self):
+        return self.frames
+
+    def start_visit(self):
+        return self.visit(self.moduleinfotable.getDefinition(self.top))
+
+    def visit_ModuleDef(self, node):
+        self.default_nettype = node.default_nettype
+        self.generic_visit(node)
+
+    def visit_Input(self, node):
+        self.addTerm(node)
+
+    def visit_Output(self, node):
+        self.addTerm(node)
+
+    def visit_Inout(self, node):
+        self.addTerm(node)
+
+    def visit_Reg(self, node):
+        self.addTerm(node)
+
+    def visit_Wire(self, node):
+        self.addTerm(node)
+
+    def visit_Tri(self, node):
+        self.addTerm(node)
+
+    def visit_Integer(self, node):
+        self.addTerm(node)
+
+    def visit_Parameter(self, node):
+        self.addTerm(node)
+        current = self.frames.getCurrent()
+        name = current + ScopeLabel(node.name, 'signal')
+        if not self.hasConstant(name):
+            value = self.optimize(self.getTree(node.value, current))
+            self.setConstant(name, value)
+
+        if len(self.dataflow.getBindlist(name)) == 0:
+            self.addBind(node.name, node.value, bindtype='parameter')
+
+    def visit_Supply(self, node):
+        self.addTerm(node)
+        current = self.frames.getCurrent()
+        name = current + ScopeLabel(node.name, 'signal')
+        self.addBind(node.name, node.value, bindtype='parameter')
+
+    def visit_Localparam(self, node):
+        self.addTerm(node)
+        current = self.frames.getCurrent()
+        name = current + ScopeLabel(node.name, 'signal')
+        if not self.hasConstant(name):
+            value = self.optimize(self.getTree(node.value, current))
+            self.setConstant(name, value)
+
+        self.addBind(node.name, node.value, bindtype='localparam')
+
+    def visit_Genvar(self, node):
+        self.addTerm(node)
+        current = self.frames.getCurrent()
+        name = self.frames.getCurrent() + ScopeLabel(node.name, 'signal')
+        value = DFEvalValue(0)
+        self.setConstant(name, value)
+
+    def visit_Function(self, node):
+        self.frames.setFunctionDef()
+        self.generic_visit(node)
+        self.frames.unsetFunctionDef()
+
+    def visit_Task(self, node):
+        self.frames.setTaskDef()
+        self.generic_visit(node)
+        self.frames.unsetTaskDef()
+
+    def visit_InstanceList(self, node):
+        for i in node.instances:
+            self.visit(i)
+
+    def visit_Instance(self, node):
+        if node.array:
+            return self._visit_Instance_array(node)
+        nodename = node.name
+        return self._visit_Instance_body(node, nodename)
+
+    def _visit_Instance_array(self, node):
+        if node.name == '':
+            raise verror.FormatError("Module %s requires an instance name" % node.module)
+
+        current = self.frames.getCurrent()
+        msb = self.optimize(self.getTree(node.array.msb, current)).value
+        lsb = self.optimize(self.getTree(node.array.lsb, current)).value
+        num_of_pins = msb + 1 - lsb
+
+        for i in range(lsb, msb + 1):
+            nodename = node.name + '_' + str(i)
+            self._visit_Instance_body(node, nodename, arrayindex=i)
+
+    def _visit_Instance_body(self, node, nodename, arrayindex=None):
+        if node.module in primitives:
+            return self._visit_Instance_primitive(node, arrayindex)
+
+        if nodename == '':
+            raise verror.FormatError("Module %s requires an instance name" % node.module)
+
+        current = self.stackInstanceFrame(nodename, node.module)
+
+        scope = self.frames.getCurrent()
+
+        paramnames = self.moduleinfotable.getParamNames(node.module)
+        for paramnames_i, param in enumerate(node.parameterlist):
+            self.addInstanceParameterBind(param, paramnames[paramnames_i])
+            value = self.optimize(self.getTree(param.argname, current))
+            paramname = paramnames[paramnames_i] if param.paramname is None else param.paramname
+            if paramname not in paramnames:
+                raise verror.FormatError("No such parameter: %s in %s" %
+                                         (paramname, nodename))
+            name = scope + ScopeLabel(paramname, 'signal')
+            self.setConstant(name, value)
+            definition = Parameter(paramname, str(value.value))
+            term = self.makeConstantTerm(name, definition, current)
+            self.setConstantTerm(name, term)
+
+        ioports = self.moduleinfotable.getIOPorts(node.module)
+        for ioport_i, port in enumerate(node.portlist):
+            if port.portname is not None and not (port.portname in ioports):
+                raise verror.FormatError("No such port: %s in %s" %
+                                         (port.argname.name, nodename))
+            self.addInstancePortBind(port, ioports[ioport_i], arrayindex)
+
+        new_current = self.frames.getCurrent()
+        self.copyFrameInfo(new_current)
+
+        self.visit(self.moduleinfotable.getDefinition(node.module))
+        self.frames.setCurrent(current)
+
+    def _visit_Instance_primitive(self, node, arrayindex=None):
+        primitive_type = primitives[node.module]
+        left = node.portlist[0].argname
+        if arrayindex is not None:
+            left = Pointer(left, IntConst(str(arrayindex)))
+        right = None
+        if primitive_type == None:
+            right = (Pointer(node.portlist[1].argname, IntConst('0')) if arrayindex is None else
+                     Pointer(node.portlist[1].argname, IntConst(str(arrayindex))))
+        elif primitive_type == Unot:
+            right = (Ulnot(Pointer(node.portlist[1].argname, IntConst('0'))) if arrayindex is None else
+                     Ulnot(Pointer(node.portlist[1].argname, IntConst(str(arrayindex)))))
+        else:
+            concat_list = ([Pointer(p.argname, IntConst('0')) for p in node.portlist[1:]] if arrayindex is None else
+                           [Pointer(p.argname, IntConst(str(arrayindex))) for p in node.portlist[1:]])
+            right = primitive_type(Concat(concat_list))
+        self.addBind(left, right, bindtype='assign')
+
+    def visit_Initial(self, node):
+        pass
+        # label = self.labels.get( self.frames.getLabelKey('initial') )
+        # current = self.stackNextFrame(label, 'initial',
+        #                              generate=self.frames.isGenerate(),
+        #                              initial=True)
+        # self.generic_visit(node)
+        # self.frames.setCurrent(current)
+
+    def visit_Always(self, node):
+        label = self.labels.get(self.frames.getLabelKey('always'))
+        current = self.stackNextFrame(label, 'always',
+                                      generate=self.frames.isGenerate(),
+                                      always=True)
+
+        (clock_name, clock_edge, clock_bit,
+         reset_name, reset_edge, reset_bit,
+         senslist) = self._createAlwaysinfo(node, current)
+
+        self.frames.setAlwaysInfo(clock_name, clock_edge, clock_bit,
+                                  reset_name, reset_edge, reset_bit, senslist)
+
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+
+    def _get_signal_name(self, n):
+        if isinstance(n, Identifier):
+            return n.name
+        if isinstance(n, Pointer):
+            return self._get_signal_name(n.var)
+        if isinstance(n, Partselect):
+            return self._get_signal_name(n.var)
+        return None
+
+    def _createAlwaysinfo(self, node, scope):
+        sens = None
+        senslist = []
+        clock_edge = None
+        clock_name = None
+        clock_bit = None
+        reset_edge = None
+        reset_name = None
+        reset_bit = None
+
+        for l in node.sens_list.list:
+            if l.sig is None:
+                continue
+
+            if isinstance(l.sig, pyverilog.vparser.ast.Pointer):
+                signame = self._get_signal_name(l.sig.var)
+                bit = int(l.sig.ptr.value)
+            else:
+                signame = self._get_signal_name(l.sig)
+                bit = 0
+
+            if signaltype.isClock(signame):
+                clock_name = self.searchTerminal(signame, scope)
+                clock_edge = l.type
+                clock_bit = bit
+            elif signaltype.isReset(signame):
+                reset_name = self.searchTerminal(signame, scope)
+                reset_edge = l.type
+                reset_bit = bit
+            else:
+                senslist.append(l)
+
+        if clock_edge is not None and len(senslist) > 0:
+            raise verror.FormatError('Illegal sensitivity list')
+        if reset_edge is not None and len(senslist) > 0:
+            raise verror.FormatError('Illegal sensitivity list')
+
+        return (clock_name, clock_edge, clock_bit, reset_name, reset_edge, reset_bit, senslist)
+
+    def visit_IfStatement(self, node):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+
+        if (self.frames.isGenerate() and
+            not self.frames.isAlways() and not self.frames.isInitial() and
+            not self.frames.isFunctioncall() and not self.frames.isTaskcall() and
+                not self.frames.isFunctiondef() and not self.frames.isTaskdef()):
+            # generate-if statement
+            current = self.frames.getCurrent()
+            tree = self.getTree(node.cond, current)
+            rslt = self.optimize(tree)
+            if not isinstance(rslt, DFEvalValue):
+                raise verror.FormatError("Can not resolve generate-if condition")
+
+            if rslt.value > 0:
+                label = self._if_true(node)
+                if node.true_statement is not None:
+                    self.copyBlockingAssigns(current + ScopeLabel(label, 'if'), current)
+            else:
+                label = self.labels.get(self.frames.getLabelKey('if'))
+                self._if_false(node, label)
+                if node.false_statement is not None:
+                    self.copyBlockingAssigns(
+                        current + ScopeLabel(self._toELSE(label), 'if'), current)
+            return
+
+        label = self._if_true(node)
+        self._if_false(node, label)
+
+        current = self.frames.getCurrent()
+        if node.true_statement is not None:
+            self.copyBlockingAssigns(current + ScopeLabel(label, 'if'), current)
+        if node.false_statement is not None:
+            self.copyBlockingAssigns(current + ScopeLabel(self._toELSE(label), 'if'), current)
+
+    def _toELSE(self, label):
+        return label + '_ELSE'
+
+    def _if_true(self, node):
+        if node.true_statement is None:
+            return None
+        label = self.labels.get(self.frames.getLabelKey('if'))
+        current = self.stackNextFrame(label, 'if',
+                                      frametype='ifthen',
+                                      condition=node.cond,
+                                      functioncall=self.frames.isFunctioncall(),
+                                      taskcall=self.frames.isTaskcall(),
+                                      generate=self.frames.isGenerate(),
+                                      always=self.frames.isAlways(),
+                                      initial=self.frames.isInitial())
+
+        self.copyPreviousNonblockingAssign(current + ScopeLabel(label, 'if'))
+
+        if node.true_statement is not None:
+            self.visit(node.true_statement)
+        self.frames.setCurrent(current)
+        return label
+
+    def _if_false(self, node, label):
+        if node.false_statement is None:
+            return
+        label = self._toELSE(label)
+        current = self.stackNextFrame(label, 'if',
+                                      frametype='ifelse',
+                                      condition=node.cond,
+                                      functioncall=self.frames.isFunctioncall(),
+                                      taskcall=self.frames.isTaskcall(),
+                                      generate=self.frames.isGenerate(),
+                                      always=self.frames.isAlways(),
+                                      initial=self.frames.isInitial())
+
+        self.copyPreviousNonblockingAssign(current + ScopeLabel(label, 'if'))
+
+        if node.false_statement is not None:
+            self.visit(node.false_statement)
+        self.frames.setCurrent(current)
+        return label
+
+    def visit_CaseStatement(self, node):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+        start_frame = self.frames.getCurrent()
+        caseframes = []
+        self._case(node.comp, node.caselist, caseframes)
+        self.frames.setCurrent(start_frame)
+        for f in caseframes:
+            self.copyBlockingAssigns(f, start_frame)
+
+    def visit_CasexStatement(self, node):
+        return self.visit_CaseStatement(node)
+
+    def _case(self, comp, caselist, myframes):
+        if len(caselist) == 0:
+            return
+
+        case = caselist[0]
+        cond = IntConst('1')
+        if case.cond is not None:
+            if len(case.cond) > 1:
+                cond = Eq(comp, case.cond[0])
+                for c in case.cond[1:]:
+                    cond = Lor(cond, Eq(comp, c))
+            else:
+                cond = Eq(comp, case.cond[0])
+        # else: raise Exception
+        label = self.labels.get(self.frames.getLabelKey('if'))
+        current = self.stackNextFrame(label, 'if',
+                                      frametype='ifthen',
+                                      condition=cond,
+                                      functioncall=self.frames.isFunctioncall(),
+                                      taskcall=self.frames.isTaskcall(),
+                                      generate=self.frames.isGenerate(),
+                                      always=self.frames.isAlways(),
+                                      initial=self.frames.isInitial())
+
+        self.copyPreviousNonblockingAssign(current + ScopeLabel(label, 'if'))
+
+        myframes.append(self.frames.getCurrent())
+
+        if case.statement is not None:
+            self.visit(case.statement)
+        self.frames.setCurrent(current)
+
+        if len(caselist) == 1:
+            return
+
+        label = self._toELSE(label)
+        current = self.stackNextFrame(label, 'if',
+                                      frametype='ifelse',
+                                      condition=cond,
+                                      functioncall=self.frames.isFunctioncall(),
+                                      taskcall=self.frames.isTaskcall(),
+                                      generate=self.frames.isGenerate(),
+                                      always=self.frames.isAlways(),
+                                      initial=self.frames.isInitial())
+
+        self.copyPreviousNonblockingAssign(current + ScopeLabel(label, 'if'))
+
+        myframes.append(current + ScopeLabel(label, 'if'))
+
+        self._case(comp, caselist[1:], myframes)
+
+    def visit_ForStatement(self, node):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+
+        # pre-statement
+        current = self.frames.getCurrent()
+        pre_right = self.getTree(node.pre.right, current)
+        pre_right_value = self.optimize(pre_right)
+        loop = pre_right_value.value
+        self.frames.setForPre()
+        self.visit(node.pre)
+        self.frames.unsetForPre()
+        label = self.labels.get(self.frames.getLabelKey('for'))
+        #loop = 0
+        start_frame = self.frames.getCurrent()
+
+        while True:
+            # cond-statement
+            current = self.frames.getCurrent()
+            raw_tree = self.getTree(node.cond, current)
+            rslt = self.optimize(raw_tree)
+            if not isinstance(rslt, DFEvalValue):
+                raise verror.FormatError(("Can not process the for-statement. "
+                                          "for-condition should be evaluated statically."))
+            if rslt.value <= 0:
+                break
+
+            # main-statement
+            current = self.stackNextFrame(label, 'for',
+                                          frametype='for',
+                                          functioncall=self.frames.isFunctioncall(),
+                                          taskcall=self.frames.isTaskcall(),
+                                          generate=self.frames.isGenerate(),
+                                          always=self.frames.isAlways(),
+                                          initial=self.frames.isInitial(),
+                                          loop=loop, loop_iter=self.frames.getForIter())
+
+            self.visit(node.statement)
+            self.copyBlockingAssigns(self.frames.getCurrent(), start_frame)
+            self.frames.setCurrent(current)
+
+            # post-statement
+            current = self.frames.getCurrent()
+            post_right = self.getTree(node.post.right, current)
+            post_right_value = self.optimize(post_right)
+            loop = post_right_value.value
+            self.frames.setForPost()
+            self.visit(node.post)
+            self.frames.unsetForPost()
+            #loop += 1
+
+    def visit_WhileStatement(self, node):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+        label = self.labels.get(self.frames.getLabelKey('while'))
+        loop = 0
+        start_frame = self.frames.getCurrent()
+
+        while True:
+            # cond-statement
+            current = self.frames.getCurrent()
+            raw_tree = self.getTree(node.cond, current)
+            rslt = self.optimize(raw_tree)
+            if not isinstance(rslt, DFEvalValue):
+                raise verror.FormatError(("Can not process the while-statement. "
+                                          "while-condition should be evaluated statically."))
+            if rslt.value <= 0:
+                break
+
+            # main-statement
+            current = self.stackNextFrame(label, 'while',
+                                          frametype='while',
+                                          functioncall=self.frames.isFunctioncall(),
+                                          taskcall=self.frames.isTaskcall(),
+                                          generate=self.frames.isGenerate(),
+                                          always=self.frames.isAlways(),
+                                          initial=self.frames.isInitial(),
+                                          loop=loop)
+
+            self.visit(node.statement)
+            self.copyBlockingAssigns(self.frames.getCurrent(), start_frame)
+            self.frames.setCurrent(current)
+            loop += 1
+
+    def visit_GenerateStatement(self, node):
+        label = self.labels.get(self.frames.getLabelKey('generate'))
+        current = self.stackNextFrame(label, 'generate',
+                                      generate=True)
+
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+
+    def visit_Block(self, node):
+        label = None
+        if node.scope is not None:
+            label = node.scope
+        else:
+            label = self.labels.get(self.frames.getLabelKey('block'))
+
+        current = self.stackNextFrame(label, 'block',
+                                      frametype='block',
+                                      functioncall=self.frames.isFunctioncall(),
+                                      taskcall=self.frames.isTaskcall(),
+                                      generate=self.frames.isGenerate(),
+                                      always=self.frames.isAlways(),
+                                      initial=self.frames.isInitial())
+
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+        if self.frames.isAlways():
+            self.copyBlockingAssigns(current + ScopeLabel(label, 'block'), current)
+
+    def visit_Assign(self, node):
+        self.addBind(node.left, node.right, bindtype='assign')
+
+    def visit_BlockingSubstitution(self, node):
+        self.addBind(node.left, node.right, self.frames.getAlwaysStatus(), 'blocking')
+
+    def visit_NonblockingSubstitution(self, node):
+        if self.frames.isForpre() or self.frames.isForpost():
+            raise verror.FormatError(("Non Blocking Substitution is not allowed"
+                                      "in for-statement"))
+        if self.frames.isFunctioncall():
+            raise verror.FormatError("Non Blocking Substitution is not allowed in function")
+        self.addBind(node.left, node.right, self.frames.getAlwaysStatus(), 'nonblocking')
+
+    def visit_SystemCall(self, node):
+        print("Warning: Isolated system call is not supported: %s" % node.syscall)
+
+    def optimize(self, node):
+        return self.optimizer.optimize(node)
+
+    def stackInstanceFrame(self, instname, modulename):
+        current = self.frames.getCurrent()
+        self.frames.setCurrent(current + ScopeLabel(instname, 'module'))
+        self.copyFrameInfo(current + ScopeLabel(instname, 'module'))
+        return current
+
+    def stackNextFrame(self, label, scopetype,
+                       frametype='none',
+                       alwaysinfo=None, condition=None,
+                       module=False, functioncall=False, taskcall=False,
+                       generate=False, always=False, initial=False, loop=None, loop_iter=None):
+        current = self.frames.getCurrent()
+        scopelabel = ScopeLabel(label, scopetype, loop)
+        nextscope = current + scopelabel
+
+        if not self.frames.hasFrame(nextscope):
+            current = self.frames.addFrame(scopelabel,
+                                           frametype=frametype,
+                                           alwaysinfo=alwaysinfo, condition=condition,
+                                           module=module, functioncall=functioncall, taskcall=taskcall,
+                                           generate=generate, always=always, initial=initial,
+                                           loop=loop, loop_iter=loop_iter)
+
+        self.frames.setCurrent(nextscope)
+        new_current = self.frames.getCurrent()
+        self.copyFrameInfo(new_current)
+        return current
+
+    def copyFrameInfo(self, current):
+        for name, definitions in self.frames.getConsts(current).items():
+            if len(definitions) > 1:
+                raise verror.FormatError("Multiple definitions for Constant")
+            for definition in definitions:
+                termtype = definition.__class__.__name__
+                term = Term(name, set([termtype]))
+                self.dataflow.addTerm(name, term)
+
+        for name, definitions in self.frames.getConsts(current).items():
+            if len(definitions) > 1:
+                raise verror.FormatError("Multiple definitions for Constant")
+            for definition in definitions:
+                cterm = self.makeConstantTerm(name, definition, current)
+                self.setConstantTerm(name, cterm)
+
+        all_passed = False
+        while not all_passed:
+            all_passed = True
+            for name, definitions in self.frames.getConsts(current).items():
+                if len(definitions) > 1:
+                    raise verror.FormatError("Multiple definitions for Constant")
+                if self.hasConstant(name):
+                    continue
+
+                for definition in definitions:
+                    if isinstance(definition, Genvar):
+                        continue
+                    value = self.optimize(self.getTree(definition.value, current))
+                    if not isinstance(value, DFEvalValue):
+                        all_passed = False
+                        continue
+                    self.setConstant(name, value)
+
+    def copyAllFrameInfo(self):
+        for name, definitions in self.frames.getAllConsts().items():
+            if len(definitions) > 1:
+                raise verror.FormatError("Multiple definitions for Constant")
+
+            for definition in definitions:
+                termtype = definition.__class__.__name__
+                term = Term(name, set([termtype]))
+                self.dataflow.addTerm(name, term)
+
+        for name, definitions in self.frames.getAllSignals().items():
+            for definition in definitions:
+                termtype = definition.__class__.__name__
+                self.dataflow.addTerm(name, Term(name, set([termtype])))
+
+        for name, definition in self.frames.getAllFunctions().items():
+            self.dataflow.addFunction(name, definition.getDefinition())
+            self.dataflow.addFunctionPorts(name, definition.getIOPorts())
+
+        for name, definition in self.frames.getAllTasks().items():
+            self.dataflow.addTask(name, definition.getDefinition())
+            self.dataflow.addTaskPorts(name, definition.getIOPorts())
+
+    def copyPreviousNonblockingAssign(self, scope):
+        assign = self.frames.getPreviousNonblockingAssign()
+        for name, bindlist in assign.items():
+            for bind in bindlist:
+                self.frames.addNonblockingAssign(name, bind)
+                msb = bind.msb
+                lsb = bind.lsb
+                ptr = bind.ptr
+                part_msb = None
+                part_lsb = None
+                condlist, flowlist = self.getCondflow(scope)
+                alwaysinfo = bind.alwaysinfo
+                raw_tree = bind.tree
+                new_bind = self.makeBind(name, msb, lsb, ptr, part_msb, part_lsb,
+                                         raw_tree, condlist, flowlist,
+                                         alwaysinfo=alwaysinfo)
+                self.dataflow.addBind(name, new_bind)
+
+    def copyBlockingAssigns(self, scope_copy_from, scope_copy_to):
+        assign = self.frames.getBlockingAssignsScope(scope_copy_from)
+        for name, bindlist in assign.items():
+            for bind in bindlist:
+                self.frames.setBlockingAssign(name, bind, scope_copy_to)
+
+    def setConstant(self, name, value):
+        self.optimizer.setConstant(name, value)
+
+    def resetConstant(self, name):
+        self.optimizer.resetConstant(name)
+
+    def getConstant(self, name):
+        return self.optimizer.getConstant(name)
+
+    def hasConstant(self, name):
+        return self.optimizer.hasConstant(name)
+
+    def setConstantTerm(self, name, term):
+        self.optimizer.setTerm(name, term)
+
+    def getTerm(self, name):
+        term = self.dataflow.getTerm(name)
+        return term
+
+    def getTermWidth(self, name):
+        term = self.dataflow.getTerm(name)
+        return term.msb, term.lsb
+
+    def getTermDims(self, name):
+        term = self.dataflow.getTerm(name)
+        return term.dims
+
+    def getTermtype(self, name):
+        term = self.dataflow.getTerm(name)
+        return term.termtype
+
+    def getBindlist(self, name):
+        return self.dataflow.getBindlist(name)
+
+    def renameVar(self, name):
+        renamedvar = (name[:-1] +
+                      ScopeLabel('_rn' + str(self.renamecnt) +
+                                   '_' + name[-1].scopename, 'signal'))
+        self.renamecnt += 1
+        return renamedvar
+
+    def toScopeChain(self, blocklabel, current):
+        scopelist = []
+        for b in blocklabel.labellist:
+            if b.loop is not None:
+                loop = self.optimize(self.getTree(b.loop, current))
+                if not isinstance(loop, DFEvalValue):
+                    raise verror.FormatError('Loop iterator should be constant')
+                scopelist.append(ScopeLabel('for', 'for', loop.value))
+            scopelist.append(ScopeLabel(b.name, 'any'))
+        return ScopeChain(scopelist)
+
+    def getModuleScopeChain(self, target):
+        remove_cnt = 0
+        length = len(target)
+        for scope in reversed(target):
+            if scope.scopetype == 'module':
+                return target[:length - remove_cnt]
+            remove_cnt += 1
+        raise verror.DefinitionError('module not found')
+
+    def searchScopeTerminal(self, blocklabel, name, current):
+        currentmodule = self.getModuleScopeChain(current)
+        localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+        matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+        varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'signal')
+        if self.dataflow.hasTerm(varname):
+            return varname
+        raise verror.DefinitionError('No such signal: %s' % varname)
+
+    # def searchScopeConstantDefinition(self, blocklabel, name, current):
+    #    currentmodule = self.getModuleScopeChain(current)
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    constdef = self.frames.getConstantDefinition(matchedchain, name)
+    #    return constdef
+
+    # def searchScopeFunction(self, blocklabel, name, current):
+    #    currentmodule = self.getModuleScopeChain(current)
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'function')
+    #    if self.dataflow.hasFunction(varname): return self.dataflow.getFunction(varname)
+    #    raise verror.DefinitionError('No such function: %s' % varname)
+
+    # def searchScopeTask(self, blocklabel, name, current):
+    #    currentmodule = self.getModuleScopeChain(current)
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'task')
+    #    if self.dataflow.hasTask(varname): return self.dataflow.getTask(varname)
+    #    raise verror.DefinitionError('No such task: %s' % varname)
+
+    # def searchScopeFunctionPorts(self, blocklabel, name, current):
+    #    currentmodule = self.getModuleScopeChain(current)
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'function')
+    #    if self.dataflow.hasFunction(varname):
+    #        return self.dataflow.getFunctionPorts(varname)
+    #    raise verror.DefinitionError('No such function: %s' % varname)
+
+    # def searchScopeTaskPorts(self, blocklabel, name, current):
+    #    currentmodule = self.frames.getModuleScopeChain(current)
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel, current)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'task')
+    #    if self.dataflow.hasTask(varname):
+    #        return self.dataflow.getTaskPorts(varname)
+    #    raise verror.DefinitionError('No such task: %s' % varname)
+
+    def searchConstantDefinition(self, key, name):
+        const = self.frames.searchConstantDefinition(key, name)
+        if const is None:
+            raise verror.DefinitionError('constant value not found: %s' % name)
+        return const
+
+    def searchTerminal(self, name, scope):
+        if len(scope) == 0:
+            return None
+        varname = scope + ScopeLabel(name, 'signal')
+        if self.dataflow.hasTerm(varname):
+            return varname
+        if self.frames.dict[scope].isModule():
+            return None
+        # if self.frames.dict[scope].isFunctioncall(): return None
+        return self.searchTerminal(name, scope[:-1])
+
+    def searchFunction(self, name, scope):
+        if len(scope) == 0:
+            return None
+        varname = scope + ScopeLabel(name, 'function')
+        if self.dataflow.hasFunction(varname):
+            return self.dataflow.getFunction(varname)
+        if self.frames.dict[scope].isModule():
+            return None
+        return self.searchFunction(name, scope[:-1])
+
+    def searchTask(self, name, scope):
+        if len(scope) == 0:
+            return None
+        varname = scope + ScopeLabel(name, 'task')
+        if self.dataflow.hasTask(varname):
+            return self.dataflow.getTask(varname)
+        if self.frames.dict[scope].isModule():
+            return None
+        return self.searchTask(name, scope[:-1])
+
+    def searchFunctionPorts(self, name, scope):
+        if len(scope) == 0:
+            return ()
+        varname = scope + ScopeLabel(name, 'function')
+        if self.dataflow.hasFunction(varname):
+            return self.dataflow.getFunctionPorts(varname)
+        if self.frames.dict[scope].isModule():
+            return ()
+        return self.searchFunctionPorts(name, scope[:-1])
+
+    def searchTaskPorts(self, name, scope):
+        if len(scope) == 0:
+            return ()
+        varname = scope + ScopeLabel(name, 'task')
+        if self.dataflow.hasTask(varname):
+            return self.dataflow.getTaskPorts(varname)
+        if self.frames.dict[scope].isModule():
+            return ()
+        return self.searchTaskPorts(name, scope[:-1])
+
+    def makeConstantTerm(self, name, node, scope):
+        termtype = node.__class__.__name__
+        termtypes = set([termtype])
+        msb = DFIntConst('31') if node.width is None else self.makeDFTree(node.width.msb, scope)
+        lsb = DFIntConst('0') if node.width is None else self.makeDFTree(node.width.lsb, scope)
+        return Term(name, termtypes, msb, lsb)
+
+    def addTerm(self, node, rscope=None):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+        scope = self.frames.getCurrent() if rscope is None else rscope
+        name = scope + ScopeLabel(node.name, 'signal')
+        termtype = node.__class__.__name__
+        if self.frames.isFunctioncall():
+            termtype = 'Function'
+        if self.frames.isTaskcall():
+            termtype = 'Task'
+        termtypes = set([termtype])
+
+        if isinstance(node, (Parameter, Localparam)):
+            msb = DFIntConst('31') if node.width is None else self.makeDFTree(node.width.msb, scope)
+        else:
+            msb = DFIntConst('0') if node.width is None else self.makeDFTree(node.width.msb, scope)
+        lsb = DFIntConst('0') if node.width is None else self.makeDFTree(node.width.lsb, scope)
+
+        dims = None
+        if node.dimensions is not None:
+            dims = []
+            for length in node.dimensions.lengths:
+                l = self.makeDFTree(length.msb, scope)
+                r = self.makeDFTree(length.lsb, scope)
+                dims.append((l, r))
+            dims = tuple(dims)
+
+        term = Term(name, termtypes, msb, lsb, dims)
+        self.dataflow.addTerm(name, term)
+        self.setConstantTerm(name, term)
+
+    def addBind(self, left, right, alwaysinfo=None, bindtype=None):
+        if self.frames.isFunctiondef() and not self.frames.isFunctioncall():
+            return
+        if self.frames.isTaskdef() and not self.frames.isTaskcall():
+            return
+        lscope = self.frames.getCurrent()
+        rscope = lscope
+        dst = self.getDestinations(left, lscope)
+
+        if bindtype == 'blocking':
+            self.addDataflow_blocking(dst, right, lscope, rscope, alwaysinfo)
+        else:
+            self.addDataflow(dst, right, lscope, rscope, alwaysinfo, bindtype)
+
+    def addInstanceParameterBind(self, param, name=None):
+        lscope = self.frames.getCurrent()
+        rscope = lscope[:-1]
+        paramname = name if param.paramname is None else param.paramname
+        dst = self.getDestinations(paramname, lscope)
+
+        self.addDataflow(dst, param.argname, lscope, rscope, None, 'parameter')
+
+    def addInstancePortBind(self, port, instportname=None, arrayindex=None):
+        lscope = self.frames.getCurrent()
+        rscope = lscope[:-1]
+        portname = instportname if port.portname is None else port.portname
+        ldst = self.getDestinations(portname, lscope)
+        if ldst[0][0] is None:
+            raise verror.DefinitionError('No such port: %s' % portname)
+
+        termtype = self.getTermtype(ldst[0][0])
+        for t in termtype:
+            if t == 'Input':
+                if port.argname is None:
+                    continue
+                portarg = (port.argname if arrayindex is None else
+                           Pointer(port.argname, IntConst(str(arrayindex))))
+                self.addDataflow(ldst, portarg, lscope, rscope)
+            elif t == 'Output':
+                if port.argname is None:
+                    continue
+                portarg = (port.argname if arrayindex is None else
+                           Pointer(port.argname, IntConst(str(arrayindex))))
+                rdst = self.getDestinations(portarg, rscope)
+                self.addDataflow(rdst, portname, rscope, lscope)
+            elif t == 'Inout':
+                if port.argname is None:
+                    continue
+                portarg = (port.argname if arrayindex is None else
+                           Pointer(port.argname, IntConst(str(arrayindex))))
+                self.addDataflow(ldst, portarg, lscope, rscope)
+                rdst = self.getDestinations(portarg, rscope)
+                self.addDataflow(rdst, portname, rscope, lscope)
+
+    def addDataflow(self, dst, right, lscope, rscope, alwaysinfo=None, bindtype=None):
+        condlist, flowlist = self.getCondflow(lscope)
+        raw_tree = self.getTree(right, rscope)
+        self.setDataflow(dst, raw_tree, condlist, flowlist, alwaysinfo, bindtype)
+
+    def addDataflow_blocking(self, dst, right, lscope, rscope, alwaysinfo):
+        condlist, flowlist = self.getCondflow(lscope)
+        raw_tree = self.getTree(right, rscope)
+
+        self.setDataflow_rename(dst, raw_tree, condlist, flowlist, lscope, alwaysinfo)
+
+        if len(dst) == 1:  # set genvar value to the constant table
+            name = dst[0][0]
+            if signaltype.isGenvar(self.getTermtype(name)):
+                value = self.optimize(raw_tree)
+                self.setConstant(name, value)
+            else:  # for "for-statement"
+                value = self.optimize(raw_tree)
+                if isinstance(value, DFEvalValue):
+                    self.setConstant(name, value)
+                else:
+                    self.resetConstant(name)
+
+    def getCondflow(self, scope):
+        condlist = self.getCondlist(scope)
+        condlist = self.resolveCondlist(condlist, scope)
+        flowlist = self.getFlowlist(scope)
+        return (condlist, flowlist)
+
+    def getCondlist(self, scope):
+        ret = []
+        s = scope
+        while s is not None:
+            frame = self.frames.dict[s]
+            cond = frame.getCondition()
+            if cond is not None:
+                ret.append(self.makeDFTree(cond, self.reduceIfScope(s)))
+            if frame.isModule():
+                break
+            s = frame.previous
+        ret.reverse()
+        return tuple(ret)
+
+    def getFlowlist(self, scope):
+        ret = []
+        s = scope
+        while s is not None:
+            frame = self.frames.dict[s]
+            cond = frame.getCondition()
+            if cond is not None:
+                ret.append(not frame.isIfelse())
+            if frame.isModule():
+                break
+            s = frame.previous
+        ret.reverse()
+        return tuple(ret)
+
+    def getTree(self, node, scope):
+        expr = node.var if isinstance(node, Rvalue) else node
+        tree = self.makeDFTree(expr, scope)
+        tree = self.resolveBlockingAssign(tree, scope)
+        if not self.noreorder:
+            tree = reorder.reorder(tree)
+        return tree
+
+    def makeDFTree(self, node, scope):
+        if isinstance(node, str):
+            name = self.searchTerminal(node, scope)
+            return DFTerminal(name)
+
+        if isinstance(node, Identifier):
+            if node.scope is not None:
+                name = self.searchScopeTerminal(node.scope, node.name, scope)
+                if name is None:
+                    raise verror.DefinitionError('No such signal: %s' % node.name)
+                return DFTerminal(name)
+            name = self.searchTerminal(node.name, scope)
+            if name is None:
+                raise verror.DefinitionError('No such signal: %s' % node.name)
+            return DFTerminal(name)
+
+        if isinstance(node, IntConst):
+            return DFIntConst(node.value)
+
+        if isinstance(node, FloatConst):
+            return DFFloatConst(node.value)
+
+        if isinstance(node, StringConst):
+            return DFStringConst(node.value)
+
+        if isinstance(node, Cond):
+            true_df = self.makeDFTree(node.true_value, scope)
+            false_df = self.makeDFTree(node.false_value, scope)
+            cond_df = self.makeDFTree(node.cond, scope)
+            if isinstance(cond_df, DFBranch):
+                return reorder.insertCond(cond_df, true_df, false_df)
+            return DFBranch(cond_df, true_df, false_df)
+
+        if isinstance(node, UnaryOperator):
+            right_df = self.makeDFTree(node.right, scope)
+            if isinstance(right_df, DFBranch):
+                return reorder.insertUnaryOp(right_df, node.__class__.__name__)
+            return DFOperator((right_df,), node.__class__.__name__)
+
+        if isinstance(node, Operator):
+            left_df = self.makeDFTree(node.left, scope)
+            right_df = self.makeDFTree(node.right, scope)
+            if isinstance(left_df, DFBranch) or isinstance(right_df, DFBranch):
+                return reorder.insertOp(left_df, right_df, node.__class__.__name__)
+            return DFOperator((left_df, right_df,), node.__class__.__name__)
+
+        if isinstance(node, Partselect):
+            var_df = self.makeDFTree(node.var, scope)
+            msb_df = self.makeDFTree(node.msb, scope)
+            lsb_df = self.makeDFTree(node.lsb, scope)
+
+            if isinstance(var_df, DFBranch):
+                return reorder.insertPartselect(var_df, msb_df, lsb_df)
+            return DFPartselect(var_df, msb_df, lsb_df)
+
+        if isinstance(node, Pointer):
+            var_df = self.makeDFTree(node.var, scope)
+            ptr_df = self.makeDFTree(node.ptr, scope)
+
+            if isinstance(var_df, DFTerminal) and self.getTermDims(var_df.name) is not None:
+                return DFPointer(var_df, ptr_df)
+            return DFPartselect(var_df, ptr_df, copy.deepcopy(ptr_df))
+
+        if isinstance(node, Concat):
+            nextnodes = []
+            for n in node.list:
+                nextnodes.append(self.makeDFTree(n, scope))
+            for n in nextnodes:
+                if isinstance(n, DFBranch):
+                    return reorder.insertConcat(tuple(nextnodes))
+            return DFConcat(tuple(nextnodes))
+
+        if isinstance(node, Repeat):
+            nextnodes = []
+            times = self.optimize(self.getTree(node.times, scope)).value
+            value = self.makeDFTree(node.value, scope)
+            for i in range(int(times)):
+                nextnodes.append(copy.deepcopy(value))
+            return DFConcat(tuple(nextnodes))
+
+        if isinstance(node, FunctionCall):
+            func = self.searchFunction(node.name.name, scope)
+            if func is None:
+                raise verror.DefinitionError('No such function: %s' % node.name.name)
+            label = self.labels.get(self.frames.getLabelKey('functioncall'))
+
+            save_current = self.frames.getCurrent()
+            self.frames.setCurrent(scope)
+
+            current = self.frames.addFrame(
+                ScopeLabel(label, 'functioncall'),
+                functioncall=True, generate=self.frames.isGenerate(),
+                always=self.frames.isAlways())
+
+            varname = self.frames.getCurrent() + ScopeLabel(func.name, 'signal')
+
+            self.addTerm(Wire(func.name, func.retwidth))
+
+            funcports = self.searchFunctionPorts(node.name.name, scope)
+            funcargs = node.args
+
+            if len(funcports) != len(funcargs):
+                raise verror.FormatError("%s takes exactly %d arguments. (%d given)" %
+                                         (func.name.name, len(funcports), len(funcargs)))
+            for port in funcports:
+                self.addTerm(Wire(port.name, port.width))
+
+            lscope = self.frames.getCurrent()
+            rscope = scope
+            func_i = 0
+            for port in funcports:
+                arg = funcargs[func_i]
+                dst = self.getDestinations(port.name, lscope)
+                self.addDataflow(dst, arg, lscope, rscope)
+                func_i += 1
+
+            self.visit(func)
+
+            self.frames.setCurrent(current)
+            self.frames.setCurrent(save_current)
+
+            return DFTerminal(varname)
+
+        if isinstance(node, TaskCall):
+            task = self.searchTask(node.name.name, scope)
+            label = self.labels.get(self.frames.getLabelKey('taskcall'))
+
+            current = self.frames.addFrame(
+                ScopeLabel(label, 'taskcall'),
+                taskcall=True, generate=self.frames.isGenerate(),
+                always=self.frames.isAlways())
+
+            varname = self.frames.getCurrent() + ScopeLabel(task.name, 'signal')
+
+            taskports = self.searchTaskPorts(node.name.name, scope)
+            taskargs = node.args
+
+            if len(taskports) != len(taskargs):
+                raise verror.FormatError("%s takes exactly %d arguments. (%d given)" %
+                                         (task.name.name, len(taskports), len(taskargs)))
+            for port in taskports:
+                self.addTerm(Wire(port.name, port.width))
+
+            lscope = self.frames.getCurrent()
+            rscope = scope
+            task_i = 0
+            for port in taskports:
+                arg = taskargs[task_i]
+                dst = self.getDestinations(port.name, lscope)
+                self.addDataflow(dst, arg, lscope, rscope)
+                task_i += 1
+
+            self.visit(taskargs)
+            self.frames.setCurrent(current)
+            return DFTerminal(varname)
+
+        if isinstance(node, SystemCall):
+            if node.syscall == 'unsigned':
+                return self.makeDFTree(node.args[0], scope)
+            if node.syscall == 'signed':
+                return self.makeDFTree(node.args[0], scope)
+            return DFIntConst('0')
+
+        raise verror.FormatError("unsupported AST node type: %s %s" %
+                                 (str(type(node)), str(node)))
+
+    def reduceIfScope(self, scope):
+        if len(scope) == 0:
+            return scope
+        if scope[-1].scopetype == 'if':
+            return scope[:-1]
+        return self.reduceIfScope(scope[:-1])
+
+    def resolveCondlist(self, condlist, scope):
+        resolved_condlist = []
+        reducedscope = self.reduceIfScope(scope)
+        for i, c in enumerate(reversed(condlist)):
+            resolved_condlist.append(self.resolveBlockingAssign(c, reducedscope))
+            reducedscope = self.reduceIfScope(reducedscope)
+        return tuple(reversed(resolved_condlist))
+
+    def removeOverwrappedCondition(self, tree, current_bindlist, scope):
+        msb, lsb = self.getTermWidth(tree.name)
+        merged_tree = self.getFitTree(current_bindlist, msb, lsb)
+        condlist, flowlist = self.getCondflow(scope)
+        (merged_tree,
+         rest_condlist,
+         rest_flowlist,
+         match_flowlist) = self.diffBranchTree(merged_tree, condlist, flowlist)
+        return replace.replaceUndefined(merged_tree, tree.name)
+
+    def resolveBlockingAssign(self, tree, scope):
+        if tree is None:
+            return None
+
+        if isinstance(tree, DFConstant):
+            return tree
+
+        if isinstance(tree, DFEvalValue):
+            return tree
+
+        if isinstance(tree, DFTerminal):
+            if signaltype.isGenvar(self.getTermtype(tree.name)):
+                return self.getConstant(tree.name)
+
+            current_bindlist = self.frames.getBlockingAssign(tree.name, scope)
+            if len(current_bindlist) == 0:
+                return tree
+
+            return self.removeOverwrappedCondition(tree, current_bindlist, scope)
+
+        if isinstance(tree, DFBranch):
+            truenode = self.resolveBlockingAssign(tree.truenode, scope)
+            falsenode = self.resolveBlockingAssign(tree.falsenode, scope)
+            condnode = self.resolveBlockingAssign(tree.condnode, scope)
+            if isinstance(condnode, DFBranch):
+                return reorder.insertBranch(condnode, truenode, falsenode)
+            return DFBranch(condnode, truenode, falsenode)
+
+        if isinstance(tree, DFOperator):
+            resolvednodes = []
+            for n in tree.nextnodes:
+                resolvednodes.append(self.resolveBlockingAssign(n, scope))
+            for r in resolvednodes:
+                if isinstance(r, DFBranch):
+                    return reorder.insertOpList(resolvednodes, tree.operator)
+            return DFOperator(tuple(resolvednodes), tree.operator)
+
+        if isinstance(tree, DFConcat):
+            resolvednodes = []
+            for n in tree.nextnodes:
+                resolvednodes.append(self.resolveBlockingAssign(n, scope))
+            for r in resolvednodes:
+                if isinstance(r, DFBranch):
+                    return reorder.insertConcat(resolvednodes)
+            return DFConcat(tuple(resolvednodes))
+
+        if isinstance(tree, DFPartselect):
+            resolved_msb = self.resolveBlockingAssign(tree.msb, scope)
+            resolved_lsb = self.resolveBlockingAssign(tree.lsb, scope)
+            resolved_var = self.resolveBlockingAssign(tree.var, scope)
+            if isinstance(resolved_var, DFBranch):
+                return reorder.insertPartselect(resolved_var,
+                                                resolved_msb, resolved_lsb)
+            return DFPartselect(resolved_var, resolved_msb, resolved_lsb)
+
+        if isinstance(tree, DFPointer):
+            resolved_ptr = self.resolveBlockingAssign(tree.ptr, scope)
+            if (isinstance(tree.var, DFTerminal) and
+                    self.getTermDims(tree.var.name) is not None):
+                current_bindlist = self.frames.getBlockingAssign(tree.var.name, scope)
+                if len(current_bindlist) == 0:
+                    return DFPointer(tree.var, resolved_ptr)
+                new_tree = DFPointer(tree.var, resolved_ptr)
+                for bind in current_bindlist:
+                    new_tree = DFBranch(DFOperator((bind.ptr, resolved_ptr), 'Eq'),
+                                        bind.tree, new_tree)
+                print(("Warning: "
+                       "Overwrting Blocking Assignment with Reg Array is not supported"))
+                return new_tree
+            resolved_var = self.resolveBlockingAssign(tree.var, scope)
+            if isinstance(resolved_var, DFBranch):
+                return reorder.insertPointer(resolved_var, resolved_ptr)
+            return DFPointer(resolved_var, resolved_ptr)
+
+        raise verror.FormatError("unsupported DFNode type: %s %s" %
+                                 (str(type(tree)), str(tree)))
+
+    def getFitTree(self, bindlist, msb, lsb):
+        optimized_msb = self.optimize(msb)
+        optimized_lsb = self.optimize(lsb)
+        for bind in bindlist:
+            if bind.msb is None and bind.lsb is None:
+                return bind.tree
+            if (self.optimize(bind.msb) == optimized_msb and
+                    self.optimize(bind.lsb) == optimized_lsb):
+                return bind.tree
+        return self.getMergedTree(bindlist)
+
+    def getMergedTree(self, bindlist):
+        concatlist = []
+        last_msb = -1
+        last_ptr = -1
+
+        def bindkey(x):
+            lsb = 0 if x.lsb is None else x.lsb.value
+            ptr = 0 if not isinstance(x.ptr, DFEvalValue) else x.ptr.value
+            term = self.getTerm(x.dest)
+            length = (abs(self.optimize(term.msb).value
+                          - self.optimize(term.lsb).value) + 1)
+            return ptr * length + lsb
+        for bind in sorted(bindlist, key=bindkey):
+            lsb = 0 if bind.lsb is None else bind.lsb.value
+            if last_ptr != (-1 if not isinstance(bind.ptr, DFEvalValue)
+                            else bind.ptr.value):
+                continue
+            if last_msb + 1 < lsb:
+                concatlist.append(DFUndefined(last_msb - lsb - 1))
+            concatlist.append(bind.tree)
+            last_msb = -1 if bind.msb is None else bind.msb.value
+            last_ptr = -1 if not isinstance(bind.ptr, DFEvalValue) else bind.ptr.value
+        return DFConcat(tuple(reversed(concatlist)))
+
+    def getDestinations(self, left, scope):
+        ret = []
+        dst = self.getDsts(left, scope)
+        part_offset = DFIntConst('0')
+        for name, msb, lsb, ptr in reversed(dst):
+            if len(dst) == 1:
+                ret.append((name, msb, lsb, ptr, None, None))
+                continue
+
+            if msb is None and lsb is None:
+                msb, lsb = self.getTermWidth(name)
+            diff = reorder.reorder(DFOperator((msb, lsb), 'Minus'))
+            part_lsb = part_offset
+            part_msb = reorder.reorder(DFOperator((part_offset, diff), 'Plus'))
+            part_offset = reorder.reorder(
+                DFOperator((part_msb, DFIntConst('1')), 'Plus'))
+
+            ret.append((name, msb, lsb, ptr, part_msb, part_lsb))
+
+        return tuple(ret)
+
+    def getDsts(self, left, scope):
+        if isinstance(left, Lvalue):
+            return self.getDsts(left.var, scope)
+        if isinstance(left, LConcat):
+            dst = []
+            for n in left.list:
+                dst.extend(list(self.getDsts(n, scope)))
+            return tuple(dst)
+        ret = (self.getDst(left, scope),)
+        return ret
+
+    def getDst(self, left, scope):
+        if isinstance(left, str):  # Parameter
+            name = self.searchTerminal(left, scope)
+            return (name, None, None, None)
+
+        if isinstance(left, Identifier):
+            name = self.searchTerminal(left.name, scope)
+            if name is None:
+                m = re.search('none', self.default_nettype)
+                if m:
+                    raise verror.FormatError("No such signal: %s" % left.name)
+                m = re.search('wire', self.default_nettype)
+                if m:
+                    self.addTerm(Wire(left.name), rscope=scope)
+                m = re.search('reg', self.default_nettype)
+                if m:
+                    self.addTerm(Reg(left.name), rscope=scope)
+                name = self.searchTerminal(left.name, scope)
+            if left.scope is not None:
+                name = left.scope + ScopeLabel(left.name, 'signal')
+            return (name, None, None, None)
+
+        if isinstance(left, Partselect):
+            if isinstance(left.var, Pointer):
+                name, msb, lsb, ptr = self.getDst(left.var, scope)
+                if msb is None and lsb is None:
+                    msb = self.optimize(self.makeDFTree(left.msb, scope))
+                    lsb = self.optimize(self.makeDFTree(left.lsb, scope))
+                else:
+                    raise verror.FormatError("%s is not array" % str(name))
+                return (name, msb, lsb, ptr)
+            name = self.searchTerminal(left.var.name, scope)
+            if left.var.scope is not None:
+                name = left.var.scope + ScopeLabel(left.var.name, 'signal')
+            msb = self.optimize(self.makeDFTree(left.msb, scope))
+            lsb = self.optimize(self.makeDFTree(left.lsb, scope))
+            return (name, msb, lsb, None)
+
+        if isinstance(left, Pointer):
+            if isinstance(left.var, Pointer):
+                name, msb, lsb, ptr = self.getDst(left.var, scope)
+                if msb is None and lsb is None:
+                    msb = self.optimize(self.makeDFTree(left.ptr, scope))
+                    lsb = copy.deepcopy(msb)
+                else:
+                    raise verror.FormatError("%s is not array" % str(name))
+                return (name, msb, lsb, ptr)
+            name = self.searchTerminal(left.var.name, scope)
+            if left.var.scope is not None:
+                name = left.var.scope + ScopeLabel(left.var.name, 'signal')
+            ptr = self.optimize(self.makeDFTree(left.ptr, scope))
+            if self.getTermDims(name) is not None:
+                return (name, None, None, ptr)
+            return (name, ptr, copy.deepcopy(ptr), None)
+
+        raise verror.FormatError("unsupported AST node type: %s %s" %
+                                 (str(type(left)), str(left)))
+
+    def setDataflow(self, dst, raw_tree, condlist, flowlist,
+                    alwaysinfo=None, bindtype=None):
+
+        for name, msb, lsb, ptr, part_msb, part_lsb in dst:
+            bind = self.makeBind(name, msb, lsb, ptr, part_msb, part_lsb,
+                                 raw_tree, condlist, flowlist,
+                                 num_dst=len(dst),
+                                 alwaysinfo=alwaysinfo,
+                                 bindtype=bindtype)
+
+            self.dataflow.addBind(name, bind)
+
+            if alwaysinfo is not None:
+                self.setNonblockingAssign(name, dst, raw_tree,
+                                          msb, lsb, ptr,
+                                          part_msb, part_lsb,
+                                          alwaysinfo)
+
+    def setDataflow_rename(self, dst, raw_tree, condlist, flowlist,
+                           scope, alwaysinfo=None):
+        renamed_dst = self.getRenamedDst(dst)
+        self.setRenamedTree(renamed_dst, raw_tree, alwaysinfo)
+        self.setRenamedFlow(dst, renamed_dst, condlist, flowlist, scope, alwaysinfo)
+
+    def setNonblockingAssign(self, name, dst, raw_tree, msb, lsb, ptr,
+                             part_msb, part_lsb, alwaysinfo):
+        tree = raw_tree
+        if len(dst) > 1:
+            tree = reorder.reorder(DFPartselect(raw_tree, part_msb, part_lsb))
+        bind = Bind(tree, name, msb, lsb, ptr, alwaysinfo)
+        self.frames.addNonblockingAssign(name, bind)
+
+    def getRenamedDst(self, dst):
+        renamed_dst = ()
+        for d in dst:
+            dname = d[0]
+            samename_exists = True
+            while samename_exists:
+                renamed_dname = self.renameVar(dname)
+                samename_exists = self.dataflow.hasTerm(renamed_dname)
+            term = self.dataflow.getTerm(dname)
+            newterm = copy.deepcopy(term)
+            newterm.name = renamed_dname
+            newterm.termtype = set(['Rename'])
+            self.dataflow.addTerm(renamed_dname, newterm)
+            newd = (renamed_dname,) + d[1:]
+            renamed_dst += (newd,)
+        return renamed_dst
+
+    def setRenamedTree(self, renamed_dst, raw_tree, alwaysinfo):
+        for name, msb, lsb, ptr, part_msb, part_lsb in renamed_dst:
+            tree = raw_tree
+            if len(renamed_dst) > 1:
+                tree = reorder.reorder(
+                    DFPartselect(tree, part_msb, part_lsb))
+            bind = Bind(tree, name, msb, lsb, ptr)
+            self.dataflow.addBind(name, bind)
+
+            value = self.optimize(tree)
+            if isinstance(value, DFEvalValue):
+                self.setConstant(name, value)
+            msb, lsb = self.getTermWidth(name)
+            self.setConstantTerm(name, Term(name, set(['Rename']), msb, lsb))
+
+    def setRenamedFlow(self, dst, renamed_dst, condlist, flowlist,
+                       scope, alwaysinfo=None):
+        term_i = 0
+        for name, msb, lsb, ptr, part_msb, part_lsb in dst:
+            renamed_term = DFTerminal(renamed_dst[term_i][0])
+            renamed_bind = self.makeBind(name, msb, lsb, ptr, part_msb, part_lsb,
+                                         renamed_term, condlist, flowlist,
+                                         num_dst=len(dst), alwaysinfo=alwaysinfo)
+            self.dataflow.addBind(name, renamed_bind)
+            self.frames.setBlockingAssign(name, renamed_bind, scope)
+            term_i += 1
+
+    def makeBind(self, name, msb, lsb, ptr, part_msb, part_lsb,
+                 raw_tree, condlist, flowlist,
+                 num_dst=1, alwaysinfo=None, bindtype=None):
+
+        current_bindlist = self.getBindlist(name)
+        current_tree = None
+        current_msb = None
+        current_lsb = None
+        current_ptr = None
+
+        if len(current_bindlist) > 0:
+            for current_bind in current_bindlist:
+                if (current_bind.msb == msb and
+                    current_bind.lsb == lsb
+                        and current_bind.ptr == ptr ):
+                    current_tree = current_bind.tree
+                    current_msb = current_bind.msb
+                    current_lsb = current_bind.lsb
+                    current_ptr = current_bind.ptr
+                    break
+
+        rest_tree = current_tree
+        rest_condlist = condlist
+        rest_flowlist = flowlist
+
+        match_flowlist = ()
+        if (current_msb == msb and
+            current_lsb == lsb
+                and current_ptr == ptr ):
+            (rest_tree,
+             rest_condlist,
+             rest_flowlist,
+             match_flowlist) = self.diffBranchTree(current_tree, condlist, flowlist)
+
+        add_tree = self.makeBranchTree(rest_condlist, rest_flowlist, raw_tree)
+        if rest_flowlist and rest_tree is not None:
+            _rest_flowlist = rest_flowlist[:-1] + (not rest_flowlist[-1], )
+            add_tree = self.appendBranchTree(add_tree, _rest_flowlist, rest_tree)
+
+        tree = reorder.reorder(
+            self.appendBranchTree(current_tree, match_flowlist, add_tree))
+
+        if num_dst > 1:
+            tree = reorder.reorder(
+                DFPartselect(tree, part_msb, part_lsb))
+
+        return Bind(tree, name, msb, lsb, ptr, alwaysinfo, bindtype)
+
+    def diffBranchTree(self, tree, condlist, flowlist, matchflowlist=()):
+        if len(condlist) == 0:
+            return (tree, condlist, flowlist, matchflowlist)
+        if not isinstance(tree, DFBranch):
+            return (tree, condlist, flowlist, matchflowlist)
+        if condlist[0] != tree.condnode:
+            return (tree, condlist, flowlist, matchflowlist)
+        if flowlist[0]:
+            return self.diffBranchTree(
+                tree.truenode, condlist[1:], flowlist[1:],
+                matchflowlist + (flowlist[0],))
+        else:
+            return self.diffBranchTree(
+                tree.falsenode, condlist[1:], flowlist[1:],
+                matchflowlist + (flowlist[0],))
+
+    def makeBranchTree(self, condlist, flowlist, node):
+        if len(condlist) == 0 or len(flowlist) == 0:
+            return node
+        if len(condlist) == 1:
+            if flowlist[0]:
+                return DFBranch(condlist[0], node, None)
+            else:
+                return DFBranch(condlist[0], None, node)
+        else:
+            if flowlist[0]:
+                return DFBranch(
+                    condlist[0],
+                    self.makeBranchTree(condlist[1:], flowlist[1:], node),
+                    None)
+            else:
+                return DFBranch(
+                    condlist[0],
+                    None,
+                    self.makeBranchTree(condlist[1:], flowlist[1:], node))
+
+    def appendBranchTree(self, base, pos, tree):
+        if len(pos) == 0:
+            return tree
+        if len(pos) == 1:
+            if pos[0]:
+                return DFBranch(base.condnode, tree, base.falsenode)
+            else:
+                return DFBranch(base.condnode, base.truenode, tree)
+        else:
+            if pos[0]:
+                return DFBranch(
+                    base.condnode,
+                    self.appendBranchTree(base.truenode, pos[1:], tree),
+                    base.falsenode)
+            else:
+                return DFBranch(
+                    base.condnode,
+                    base.truenode,
+                    self.appendBranchTree(base.falsenode, pos[1:], tree))
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow.py
new file mode 100644
index 0000000..da85be2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow.py
@@ -0,0 +1,1056 @@
+# -------------------------------------------------------------------------------
+# dataflow.py
+#
+# Basic classes of Data flow nodes
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# Contributor: ryosuke fukatani
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import re
+import copy
+
+dfnodelist = ('DFIntConst', 'DFFloatConst', 'DFStringConst',
+              'DFEvalValue', 'DFUndefined', 'DFHighImpedance',
+              'DFTerminal',
+              'DFBranch', 'DFOperator', 'DFPartselect', 'DFPointer',
+              'DFConcat', 'DFDelay', 'DFSyscall')
+
+
+def printIndent(s, indent=4):
+    print((' ' * indent) + s)
+
+
+def generateWalkTree(offset=1):
+    base_indent = 4
+    printIndent('def walkTree(tree):', base_indent * (0 + offset))
+    for df in dfnodelist:
+        printIndent('if isinstance(tree, %s):' % df, base_indent * (1 + offset))
+        printIndent('pass', base_indent * (2 + offset))
+
+
+if __name__ == '__main__':
+    generateWalkTree()
+    exit()
+
+import pyverilog.utils.verror as verror
+import pyverilog.utils.util as util
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.utils.op2mark as op2mark
+
+
+class DFNode(object):
+    attr_names = ()
+
+    def __init__(self): pass
+
+    def __repr__(self): pass
+
+    def tostr(self): pass
+
+    def tocode(self, dest='dest'): return self.__repr__()
+
+    def tolabel(self): return self.__repr__()
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return False
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return id(self)
+
+
+class DFTerminal(DFNode):
+    attr_names = ('name',)
+
+    def __init__(self, name):
+        self.name = name
+
+    def __repr__(self):
+        ret = ''
+        for n in self.name:
+            ret += str(n) + '.'
+        return ret[:-1]
+
+    def tostr(self):
+        ret = '(Terminal '
+        for n in self.name:
+            ret += str(n) + '.'
+        return ret[0:-1] + ')'
+
+    def tocode(self, dest='dest'):
+        # ret = ''
+        # for n in self.name:
+        #    ret += n.tocode() + '__'
+        # return ret[:-2]
+        return self.name.tocode()
+
+    def tolabel(self):
+        return self.tocode()
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.name == other.name
+
+    def __hash__(self):
+        return hash(self.name)
+
+
+class DFConstant(DFNode):
+    attr_names = ('value',)
+
+    def __init__(self, value):
+        self.value = value
+
+    def __repr__(self):
+        return str(self.value)
+
+    def tostr(self):
+        ret = '(Constant ' + str(self.value) + ')'
+        return ret
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def eval(self):
+        return None
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.value == other.value
+
+    def __hash__(self):
+        return hash(self.value)
+
+
+class DFIntConst(DFConstant):
+    def __init__(self, value):
+        self.value = value
+
+    def tostr(self):
+        ret = '(IntConst ' + str(self.value) + ')'
+        return ret
+
+    def eval(self):
+        targ = self.value.replace('_', '')
+        signed = False
+        match = re.search(r'[Ss](.+)', targ)
+        if match is not None:
+            signed = True
+        match = re.search(r'[Hh](.+)', targ)
+        if match is not None:
+            return int(match.group(1), 16)
+        match = re.search(r'[Dd](.+)', targ)
+        if match is not None:
+            return int(match.group(1), 10)
+        match = re.search(r'[Oo](.+)', targ)
+        if match is not None:
+            return int(match.group(1), 8)
+        match = re.search(r'[Bb](.+)', targ)
+        if match is not None:
+            return int(match.group(1), 2)
+        return int(targ, 10)
+
+    def width(self):
+        targ = self.value.replace('_', '')
+        match = re.search(r'(.+)\'[Hh].+', targ)
+        if match is not None:
+            return int(match.group(1), 10)
+        match = re.search(r'(.+)\'[Dd].+', targ)
+        if match is not None:
+            return int(match.group(1), 10)
+        match = re.search(r'(.+)\'[Oo].+', targ)
+        if match is not None:
+            return int(match.group(1), 10)
+        match = re.search(r'(.+)\'[Bb].+', targ)
+        if match is not None:
+            return int(match.group(1), 10)
+        return 32
+
+
+class DFFloatConst(DFConstant):
+    def __init__(self, value):
+        self.value = value
+
+    def tostr(self):
+        ret = '(FloatConst ' + str(self.value) + ')'
+        return ret
+
+    def eval(self):
+        return float(self.value)
+
+
+class DFStringConst(DFConstant):
+    def __init__(self, value):
+        self.value = value
+
+    def tostr(self):
+        ret = '(StringConst ' + str(self.value) + ')'
+        return ret
+
+    def eval(self):
+        return self.value
+
+
+class DFNotTerminal(DFNode):
+    pass
+
+
+class DFOperator(DFNotTerminal):
+    attr_names = ('operator',)
+
+    def __init__(self, nextnodes, operator):
+        self.nextnodes = nextnodes
+        self.operator = operator
+
+        for n in nextnodes:
+            if n is None:
+                raise verror.DefinitionError()
+
+    def __repr__(self):
+        return self.operator
+
+    def tostr(self):
+        ret = '(Operator ' + self.operator
+        ret += ' Next:'
+        for n in self.nextnodes:
+            ret += n.tostr() + ','
+        ret = ret[0:-1] + ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        ret = ''
+        if len(self.nextnodes) > 1:
+            ret += '(' + self.nextnodes[0].tocode(dest)
+            ret += op2mark.op2mark(self.operator)
+            ret += self.nextnodes[1].tocode(dest) + ')'
+        else:
+            ret += '(' + op2mark.op2mark(self.operator)
+            ret += self.nextnodes[0].tocode(dest) + ')'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.nextnodes is not None:
+            nodelist.extend(self.nextnodes)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.operator == other.operator and self.nextnodes == other.nextnodes
+
+    def __hash__(self):
+        return hash((self.operator, tuple(self.nextnodes)))
+
+
+class DFPartselect(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, var, msb, lsb):
+        self.var = var
+        self.msb = msb
+        self.lsb = lsb
+
+    def __repr__(self):
+        return 'PartSelect'
+
+    def tostr(self):
+        ret = '(Partselect'
+        ret += ' Var:' + self.var.tostr()
+        ret += ' MSB:' + self.msb.tostr()
+        ret += ' LSB:' + self.lsb.tostr()
+        ret += ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        ret = self.var.tocode(dest)
+        msbcode = self.msb.tocode(dest)
+        lsbcode = self.lsb.tocode(dest)
+        if msbcode == lsbcode:
+            ret += '[' + msbcode + ']'
+        else:
+            ret += '[' + msbcode
+            ret += ':' + lsbcode + ']'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.var is not None:
+            nodelist.append(self.var)
+        if self.msb is not None:
+            nodelist.append(self.msb)
+        if self.lsb is not None:
+            nodelist.append(self.lsb)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.var == other.var and self.msb == other.msb and self.lsb == other.lsb
+
+    def __hash__(self):
+        return hash((self.var, self.msb, self.lsb))
+
+
+class DFPointer(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, var, ptr):
+        self.var = var
+        self.ptr = ptr
+
+    def __repr__(self):
+        return 'Pointer'
+
+    def tostr(self):
+        ret = '(Pointer'
+        ret += ' Var:' + self.var.tostr()
+        ret += ' PTR:' + self.ptr.tostr()
+        ret += ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        ret = self.var.tocode(dest)
+        ret += '[' + self.ptr.tocode(dest) + ']'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.var is not None:
+            nodelist.append(self.var)
+        if self.ptr is not None:
+            nodelist.append(self.ptr)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.var == other.var and self.ptr == other.ptr
+
+    def __hash__(self):
+        return hash((self.var, self.ptr))
+
+
+class DFConcat(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, nextnodes):
+        self.nextnodes = nextnodes
+
+    def __repr__(self):
+        return 'Concat'
+
+    def tostr(self):
+        ret = '(Concat'
+        ret += ' Next:'
+        for n in self.nextnodes:
+            ret += n.tostr() + ','
+        ret = ret[0:-1] + ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        ret = '{'
+        for n in self.nextnodes:
+            ret += n.tocode(dest) + ','
+        ret = ret[:-1]
+        ret += '}'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.nextnodes is not None:
+            nodelist.extend(self.nextnodes)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.nextnodes == other.nextnodes
+
+    def __hash__(self):
+        return hash(tuple(self.nextnodes))
+
+
+class DFBranch(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, condnode, truenode, falsenode):
+        self.condnode = condnode
+        self.truenode = truenode
+        self.falsenode = falsenode
+
+    def __repr__(self):
+        return 'Branch'
+
+    def tostr(self):
+        ret = '(Branch'
+        if self.condnode is not None:
+            ret += ' Cond:' + self.condnode.tostr()
+        if self.truenode is not None:
+            ret += ' True:' + self.truenode.tostr()
+        if self.falsenode is not None:
+            ret += ' False:' + self.falsenode.tostr()
+        ret += ')'
+        return ret
+
+    def tocode(self, dest='dest', always=''):
+        if always == 'clockedge':
+            return self._tocode_always(dest, always)
+        if always == 'combination':
+            return self._tocode_always(dest, always)
+        ret = '('
+        if self.condnode is not None:
+            ret += '(' + self.condnode.tocode(dest) + ')'
+        ret += '? '
+        if self.truenode is not None:
+            ret += self.truenode.tocode(dest)
+        else:
+            ret += dest
+        ret += " : "
+        if self.falsenode is not None:
+            ret += self.falsenode.tocode(dest)
+        else:
+            ret += dest
+        ret += ")"
+        return ret
+
+    def _tocode_always(self, dest='dest', always='clockedge'):
+        ret = 'if('
+        if self.condnode is not None:
+            ret += self.condnode.tocode(dest)
+        ret += ') begin\n'
+        if self.truenode is not None:
+            if isinstance(self.truenode, DFBranch):
+                ret += self.truenode.tocode(dest, always=always)
+            elif always == 'clockedge':
+                ret += dest + ' <= ' + self.truenode.tocode(dest) + ';\n'
+            elif always == 'combination':
+                ret += dest + ' = ' + self.truenode.tocode(dest) + ';\n'
+        ret += 'end\n'
+        if self.falsenode is not None:
+            ret += 'else begin\n'
+            if isinstance(self.falsenode, DFBranch):
+                ret += self.falsenode.tocode(dest, always=always)
+            elif always == 'clockedge':
+                ret += dest + ' <= ' + self.falsenode.tocode(dest) + ';\n'
+            elif always == 'combination':
+                ret += dest + ' = ' + self.falsenode.tocode(dest) + ';\n'
+            ret += 'end\n'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.truenode is not None:
+            nodelist.append(self.truenode)
+        if self.condnode is not None:
+            nodelist.append(self.condnode)
+        if self.falsenode is not None:
+            nodelist.append(self.falsenode)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return (self.condnode == other.condnode
+                and self.truenode == other.truenode
+                and self.falsenode == other.falsenode)
+
+    def __hash__(self):
+        return hash((self.condnode, self.truenode, self.falsenode))
+
+
+class DFEvalValue(DFNode):
+    attr_names = ('value', 'width',)
+
+    def __init__(self, value, width=32, isfloat=False, isstring=False):
+        self.value = value
+        self.width = width
+        self.isfloat = isfloat
+        self.isstring = isstring
+
+    def __repr__(self):
+        if self.isstring:
+            return self.value
+        ret = ''
+        if self.value < 0:
+            ret += '(-'
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += str(abs(self.value))
+        if self.value < 0:
+            ret += ')'
+        return ret
+
+    def tostr(self):
+        if self.isstring:
+            return self.value
+        ret = ''
+        if self.value < 0:
+            ret += '(-'
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += str(abs(self.value))
+        if self.value < 0:
+            ret += ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        return self.__repr__()
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def eval(self):
+        return self.value
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return (self.value == other.value
+                and self.width == other.width
+                and self.isfloat == other.isfloat
+                and self.isstring == other.isstring)
+
+    def __hash__(self):
+        return hash((self.value, self.width, self.isfloat, self.isstring))
+
+
+class DFUndefined(DFNode):
+    attr_names = ('width',)
+
+    def __init__(self, width):
+        self.width = width
+
+    def __repr__(self):
+        ret = ''
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += 'x'
+        return ret
+
+    def tostr(self):
+        ret = ''
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += 'x'
+        return ret
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.width == other.width
+
+    def __hash__(self):
+        return hash(self.width)
+
+
+class DFHighImpedance(DFNode):
+    attr_names = ('width',)
+
+    def __init__(self, width):
+        self.width = width
+
+    def __repr__(self):
+        ret = ''
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += 'z'
+        return ret
+
+    def tostr(self):
+        ret = ''
+        if self.width != 32:
+            ret += str(self.width)
+        ret += "'d"
+        ret += 'z'
+        return ret
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.width == other.width
+
+    def __hash__(self):
+        return hash(self.width)
+
+
+class DFDelay(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, nextnode):
+        self.nextnode = nextnode
+
+    def __repr__(self):
+        return 'Delay'
+
+    def tostr(self):
+        ret = '(Delay '
+        if self.nextnode is not None:
+            ret += self.nextnode.tostr()
+        ret += ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        raise verror.DefinitionError('DFDelay does not support tocode()')
+
+    def children(self):
+        nodelist = []
+        if self.nextnode is not None:
+            nodelist.append(self.nextnode)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.nextnodes == other.nextnodes
+
+    def __hash__(self):
+        return hash(tuple(self.nextnodes))
+
+
+class DFSyscall(DFNotTerminal):
+    attr_names = ()
+
+    def __init__(self, syscall, nextnodes):
+        self.syscall = syscall
+        self.nextnodes = nextnodes
+
+    def __repr__(self):
+        return 'Syscall'
+
+    def tostr(self):
+        ret = '(Syscall '
+        ret += self.syscall
+        ret += ' Next:'
+        for n in self.nextnodes:
+            ret += n.tostr() + ','
+        ret = ret[0:-1] + ')'
+        return ret
+
+    def tocode(self, dest='dest'):
+        ret = '$' + self.syscall + '('
+        for n in self.nextnodes:
+            ret += n.tocode(dest) + ','
+        ret = ret[:-1]
+        ret += ')'
+        return ret
+
+    def children(self):
+        nodelist = []
+        if self.nextnodes is not None:
+            nodelist.extend(self.nextnodes)
+        return tuple(nodelist)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        if self.syscall != other.syscall:
+            return False
+        return self.nextnodes == other.nextnodes
+
+    def __hash__(self):
+        return hash(tuple(self.nextnodes))
+
+
+class Term(object):
+    def __init__(self, name, termtype=(), msb=None, lsb=None, dims=None):
+        self.name = name  # tuple (str)
+        self.termtype = termtype  # set (str)
+        self.msb = msb  # DFNode
+        self.lsb = lsb  # DFNode
+        self.dims = dims  # tuple/list of pair of DFNode
+
+    def __repr__(self):
+        return str(self.name)
+
+    def tostr(self):
+        ret = '(Term name:' + str(self.name) + ' type:' + \
+            str(sorted(self.termtype, key=lambda x: str(x)))
+        if self.msb is not None:
+            ret += ' msb:' + self.msb.tostr()
+        if self.lsb is not None:
+            ret += ' lsb:' + self.lsb.tostr()
+        if self.dims is not None:
+            ret += ' dims:'
+            ret += ''.join(['[' + l.tostr() + ':' + r.tostr() + ']'
+                            for l, r in self.dims])
+        ret += ')'
+        return ret
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return (self.name == other.name
+                and self.termtype == other.termtype
+                and self.msb == other.msb
+                and self.lsb == other.lsb
+                and self.dims == other.dims)
+
+    def __hash__(self):
+        return hash((self.name, self.termtype, self.msb, self.lsb, self.dims))
+
+    def getScope(self, termname):
+        return termname[:-1]
+
+    def isTopmodule(self, scope):
+        if len(scope) == 1:
+            return True
+        return False
+
+    def tocode(self):
+        flatname = util.toFlatname(self.name)
+        scope = self.getScope(self.name)
+        code = ''
+        if self.isTopmodule(scope):
+            if signaltype.isInput(self.termtype):
+                code += 'input '
+            elif signaltype.isInout(self.termtype):
+                code += 'inout '
+            elif signaltype.isOutput(self.termtype):
+                code += 'output '
+        else:
+            if signaltype.isInput(self.termtype):
+                code += 'wire '
+            elif signaltype.isInout(self.termtype):
+                code += 'wire '
+            elif signaltype.isOutput(self.termtype) and not signaltype.isReg(self.termtype):
+                code += 'wire '
+
+        if signaltype.isReg(self.termtype):
+            code += 'reg '
+        if signaltype.isWire(self.termtype):
+            code += 'wire '
+        if signaltype.isInteger(self.termtype):
+            code += 'integer '
+        if signaltype.isFunction(self.termtype):
+            code += 'wire '
+        if signaltype.isRename(self.termtype):
+            code += 'wire '
+
+        if (not signaltype.isInteger(self.termtype)
+                and self.msb is not None and self.lsb is not None):
+            code += '[' + self.msb.tocode(None) + ':' + self.lsb.tocode(None) + '] '
+        code += flatname  # signal name
+        if self.dims is not None:
+            code += ''.join(['[' + l.tocode() + ':' + r.tocode() + ']'
+                             for l, r in self.dims])
+        code += ';\n'
+        return code
+
+
+class Bind(object):
+    def __init__(self, tree, dest, msb=None, lsb=None, ptr=None,
+                 alwaysinfo=None, parameterinfo=''):
+        self.tree = tree
+        self.dest = dest
+        self.msb = msb
+        self.lsb = lsb
+        self.ptr = ptr
+        self.alwaysinfo = alwaysinfo
+        self.parameterinfo = parameterinfo
+        if dest is None:
+            raise verror.DefinitionError('Bind dest is empty')
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return (self.tree == other.tree and
+                self.dest == other.dest
+                and self.msb == other.msb
+                and self.lsb == other.lsb
+                and self.ptr == other.ptr
+                and self.alwaysinfo == other.alwaysinfo
+                and self.parameterinfo == other.parameterinfo)
+
+    def __hash__(self):
+        return hash((self.tree, self.dest, self.msb, self.lsb, self.ptr,
+                     self.alwaysinfo, self.parameterinfo))
+
+    def isCombination(self):
+        if self.alwaysinfo is None:
+            return True
+        if self.alwaysinfo.isCombination():
+            return True
+        return False
+
+    def tostr(self):
+        ret = '(Bind'
+        if self.dest is not None:
+            ret += ' dest:' + str(self.dest)
+        if self.msb is not None:
+            ret += ' msb:' + self.msb.tostr()
+        if self.lsb is not None:
+            ret += ' lsb:' + self.lsb.tostr()
+        if self.ptr is not None:
+            ret += ' ptr:' + self.ptr.tostr()
+        if self.tree is not None:
+            ret += ' tree:' + self.tree.tostr()
+        ret += ')'
+        return ret
+
+    def tocode(self):
+        if self.parameterinfo == 'parameter':
+            return self._parameter()
+        if self.parameterinfo == 'localparam':
+            return self._localparam()
+        if self.alwaysinfo is None:
+            return self._assign()
+        if self.alwaysinfo.isCombination():
+            return self._always_combination()
+        else:
+            return self._always_clockedge()
+
+    def getdest(self):
+        dest = util.toFlatname(self.dest)
+        if self.ptr is not None:
+            dest += '[' + self.ptr.tocode(None) + ']'
+        if self.msb is not None and self.lsb is not None:
+            msbcode = self.msb.tocode(None)
+            lsbcode = self.lsb.tocode(None)
+            if msbcode == lsbcode:
+                dest += '[' + msbcode + ']'
+            else:
+                dest += '[' + msbcode + ':' + lsbcode + ']'
+        return dest
+
+    def _parameter(self):
+        dest = self.getdest()
+        code = 'parameter ' + dest
+        code += ' = ' + self.tree.tocode(dest) + ';\n'
+        return code
+
+    def _localparam(self):
+        dest = self.getdest()
+        code = 'localparam ' + dest
+        code += ' = ' + self.tree.tocode(dest) + ';\n'
+        return code
+
+    def _assign(self):
+        dest = self.getdest()
+        code = 'assign ' + dest
+        code += ' = ' + self.tree.tocode(dest) + ';\n'
+        return code
+
+    def _always_clockedge(self):
+        dest = self.getdest()
+        code = 'always @('
+        if self.alwaysinfo.clock_edge is not None and self.alwaysinfo.clock_name is not None:
+            code += self.alwaysinfo.clock_edge + ' '
+            code += util.toFlatname(self.alwaysinfo.clock_name)
+        if self.alwaysinfo.reset_edge is not None and self.alwaysinfo.reset_name is not None:
+            code += ' or '
+            code += self.alwaysinfo.reset_edge + ' '
+            code += util.toFlatname(self.alwaysinfo.reset_name)
+        code += ') begin\n'
+        if isinstance(self.tree, DFBranch):
+            code += self.tree.tocode(dest, always='clockedge')
+        else:
+            code += dest
+            code += ' <= ' + self.tree.tocode(dest) + ';\n'
+        code += 'end\n'
+        code += '\n'
+        return code
+
+    def _always_combination(self):
+        dest = self.getdest()
+        code = ''
+        code += 'always @*'
+        code += ' begin\n'
+        if isinstance(self.tree, DFBranch):
+            code += self.tree.tocode(dest, always='combination')
+        else:
+            code += dest
+            code += ' = ' + self.tree.tocode(dest) + ';\n'
+        code += 'end\n'
+        code += '\n'
+        return code
+
+    def isClockEdge(self):
+        if self.alwaysinfo is None:
+            return False
+        return self.alwaysinfo.isClockEdge()
+
+    def getClockName(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getClockName()
+
+    def getClockEdge(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getClockEdge()
+
+    def getClockBit(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getClockBit()
+
+    def getResetName(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getResetName()
+
+    def getResetEdge(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getResetEdge()
+
+    def getResetBit(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getResetBit()
+
+    def getSenslist(self):
+        if self.alwaysinfo is None:
+            return ''
+        return self.alwaysinfo.getSenslist()
+
+
+class DataFlow(object):
+    def __init__(self):
+        self.terms = {}
+        self.binddict = {}
+
+        self.functions = {}
+        self.function_ports = {}
+        self.tasks = {}
+        self.task_ports = {}
+        self.temporal_value = {}
+
+    def addTerm(self, name, term):
+        if not name in self.terms:
+            self.terms[name] = term
+        else:
+            self.setTerm(name, term)
+
+    def setTerm(self, name, term):
+        self.terms[name].termtype |= term.termtype
+        if self.terms[name].msb is None:
+            self.terms[name].msb = term.msb
+        if self.terms[name].lsb is None:
+            self.terms[name].lsb = term.lsb
+        if self.terms[name].dims is None:
+            self.terms[name].dims = term.dims
+
+    def hasTerm(self, name):
+        return name in self.terms
+
+    def getTerm(self, name):
+        if name in self.terms:
+            return self.terms[name]
+        return None
+
+    def getTerms(self):
+        return self.terms
+
+    def addBind(self, name, bind):
+        if name is None:
+            raise verror.DefinitionError('Bind name is empty')
+        if not name in self.binddict:
+            self.binddict[name] = [bind, ]
+        else:
+            self.setBind(name, bind)
+
+    def setBind(self, name, bind):
+        if name is None:
+            raise verror.DefinitionError('Bind name is empty')
+        currentbindlist = self.binddict[name]
+        c_i = 0
+        for c in currentbindlist:
+            if c.msb == bind.msb and c.lsb == bind.lsb and c.ptr == bind.ptr:
+                self.binddict[name][c_i].tree = bind.tree
+                return
+            c_i += 1
+        self.binddict[name] = currentbindlist + [bind, ]
+
+    def getBindlist(self, name):
+        if name in self.binddict:
+            return tuple(self.binddict[name])
+        return ()
+
+    def getBinddict(self):
+        return self.binddict
+
+    def addFunction(self, name, definition):
+        self.functions[name] = definition
+
+    def hasFunction(self, name):
+        return name in self.functions
+
+    def getFunction(self, name):
+        if name in self.functions:
+            return self.functions[name]
+        return None
+
+    def addFunctionPorts(self, name, ports):
+        self.function_ports[name] = ports
+
+    def getFunctionPorts(self, name):
+        if name in self.function_ports:
+            return self.function_ports[name]
+        return ()
+
+    def addTask(self, name, definition):
+        self.tasks[name] = definition
+
+    def hasTask(self, name):
+        return name in self.tasks
+
+    def getTask(self, name):
+        if name in self.tasks:
+            return self.tasks[name]
+        return None
+
+    def addTaskPorts(self, name, ports):
+        self.task_ports[name] = ports
+
+    def getTaskPorts(self, name):
+        if name in self.task_ports:
+            return self.task_ports[name]
+        return ()
+
+    def setTemporalValue(self, name, value):
+        self.temporal_value[name] = value
+
+    def getTemporalValue(self, name):
+        return self.temporal_value[name]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_analyzer.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_analyzer.py
new file mode 100644
index 0000000..1450d22
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_analyzer.py
@@ -0,0 +1,88 @@
+# -------------------------------------------------------------------------------
+# dataflow_analyzer.py
+#
+# Verilog module signal/module dataflow analyzer
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.vparser.parser import VerilogCodeParser
+from pyverilog.dataflow.modulevisitor import ModuleVisitor
+from pyverilog.dataflow.signalvisitor import SignalVisitor
+from pyverilog.dataflow.bindvisitor import BindVisitor
+
+# Increasing the maximum recursion size for deeper traversal
+sys.setrecursionlimit(16 * 1024)
+
+
+class VerilogDataflowAnalyzer(VerilogCodeParser):
+    def __init__(self, filelist, topmodule='TOP', noreorder=False, nobind=False,
+                 preprocess_include=None,
+                 preprocess_define=None):
+        self.topmodule = topmodule
+        self.terms = {}
+        self.binddict = {}
+        self.frametable = None
+        files = filelist if isinstance(filelist, tuple) or isinstance(
+            filelist, list) else [filelist]
+        VerilogCodeParser.__init__(self, files,
+                                   preprocess_include=preprocess_include,
+                                   preprocess_define=preprocess_define)
+        self.noreorder = noreorder
+        self.nobind = nobind
+
+    def generate(self):
+        ast = self.parse()
+
+        module_visitor = ModuleVisitor()
+        module_visitor.visit(ast)
+        modulenames = module_visitor.get_modulenames()
+        moduleinfotable = module_visitor.get_moduleinfotable()
+
+        signal_visitor = SignalVisitor(moduleinfotable, self.topmodule)
+        signal_visitor.start_visit()
+        frametable = signal_visitor.getFrameTable()
+
+        if self.nobind:
+            self.frametable = frametable
+            return
+
+        bind_visitor = BindVisitor(moduleinfotable, self.topmodule, frametable,
+                                   noreorder=self.noreorder)
+
+        bind_visitor.start_visit()
+        dataflow = bind_visitor.getDataflows()
+
+        self.frametable = bind_visitor.getFrameTable()
+        self.terms = dataflow.getTerms()
+        self.binddict = dataflow.getBinddict()
+
+    def getFrameTable(self):
+        return self.frametable
+
+    # -------------------------------------------------------------------------
+    def getInstances(self):
+        if self.frametable is None:
+            return ()
+        return self.frametable.getAllInstances()
+
+    def getSignals(self):
+        if self.frametable is None:
+            return ()
+        return self.frametable.getAllSignals()
+
+    def getConsts(self):
+        if self.frametable is None:
+            return ()
+        return self.frametable.getAllConsts()
+
+    def getTerms(self):
+        return self.terms
+
+    def getBinddict(self):
+        return self.binddict
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_codegen.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_codegen.py
new file mode 100644
index 0000000..e2d24aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/dataflow_codegen.py
@@ -0,0 +1,167 @@
+# -------------------------------------------------------------------------------
+# codegen.py (Obsoleted)
+#
+# Code generator from dataflow
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import re
+
+import pyverilog.utils.util as util
+import pyverilog.utils.signaltype as signaltype
+from pyverilog.dataflow.subset import VerilogSubset
+
+
+class VerilogCodeGenerator(VerilogSubset):
+    def __init__(self, topmodule, terms, binddict,
+                 resolved_terms, resolved_binddict, constlist,
+                 modulename='Subset', enable_name='HT_enable', num_indent=2, flat=True):
+        VerilogSubset.__init__(self, topmodule, terms, binddict,
+                               resolved_terms, resolved_binddict, constlist)
+        self.modulename = modulename
+        self.enable_name = enable_name
+        self.num_indent = num_indent
+        self.flat = flat
+
+    def addBind(self, name, bind):
+        if name in self.binddict:
+            self.binddict[name] += (bind,)
+        else:
+            self.binddict[name] = (bind,)
+        if name in self.resolved_binddict:
+            self.resolved_binddict[name] += (bind,)
+        else:
+            self.resolved_binddict[name] = (bind,)
+
+    def addTerm(self, name, term):
+        self.terms[name] = term
+        self.resolved_terms[name] = term
+
+    def _input(self, name):
+        return 'input ' + name + ';\n'
+
+    def _output(self, name):
+        return 'output ' + name + ';\n'
+
+    def _inout(self, name):
+        return 'inout ' + name + ';\n'
+
+    def _wire(self, name):
+        return 'wire ' + name + ';\n'
+
+    def _modulehead(self, terms):
+        modulehead = ''
+        modulehead += '`default_nettype none\n'
+        modulehead += 'module ' + self.modulename + '('
+        modulehead += '\n' + (' ' * self.num_indent)
+        modulehead += self.clock_name + ', '
+        modulehead += self.reset_name + ', '
+        modulehead += self.enable_name + ', '
+        modulehead += '\n' + (' ' * self.num_indent)
+
+        for tk, tv in terms.items():
+            scope = util.getScope(tk)
+            if util.isTopmodule(scope):
+                termtype = self.getTermtype(tk)
+                if signaltype.isInput(termtype) and tk == util.toTermname((self.topmodule, self.reset_name)):
+                    continue
+                if signaltype.isInput(termtype) and tk == util.toTermname((self.topmodule, self.clock_name)):
+                    continue
+                if signaltype.isInput(termtype):
+                    modulehead += util.toFlatname(tk) + ', '
+                elif signaltype.isInout(termtype):
+                    modulehead += util.toFlatname(tk) + ', '
+                elif signaltype.isOutput(termtype):
+                    modulehead += util.toFlatname(tk) + ', '
+        modulehead = modulehead[:-2] + ');\n\n'
+        return modulehead
+
+    def _system_io(self, clock_name, reset_name, enable_name):
+        flat_clock_name = util.toFlatname(util.toTermname((self.topmodule, clock_name)))
+        flat_reset_name = util.toFlatname(util.toTermname((self.topmodule, reset_name)))
+        flat_enable_name = util.toFlatname(util.toTermname((self.topmodule, enable_name)))
+        code = ''
+        code += self._input(clock_name)
+        code += self._input(reset_name)
+        code += self._input(enable_name)
+        code += self._wire(flat_clock_name)
+        code += self._wire(flat_reset_name)
+        code += self._assign(flat_clock_name, clock_name)
+        code += self._assign(flat_reset_name, reset_name)
+        code += '\n'
+        return code
+
+    def _assign(self, left, right, msb=None, lsb=None):
+        code = 'assign ' + left
+        if msb is not None and lsb is not None:
+            code += '[' + msb.tocode(None) + ':' + lsb.tocode(None) + ']'
+        elif msb is not None:
+            code += '[' + msb.tocode(None) + ']'
+        elif lsb is not None:
+            code += '[' + lsb.tocode(None) + ']'
+        code += ' = ' + right + ';\n'
+        return code
+
+    def generateCode(self, targets=()):
+        if len(targets) > 0:
+            return self.generateSubsetCode(targets)
+        return self.generateEntireCode()
+
+    def generateSubsetCode(self, targets):
+        terms, parameter, assign, always_clockedge, always_combination = self.getSubset(targets)
+        return self._toCode(terms, parameter, assign, always_clockedge, always_combination)
+
+    def generateEntireCode(self):
+        terms, parameter, assign, always_clockedge, always_combination = self.getEntire()
+        return self._toCode(terms, parameter, assign, always_clockedge, always_combination)
+
+    def _toCode(self, terms, parameter, assign, always_clockedge, always_combination):
+        # module header
+        modulehead = self._modulehead(terms)
+
+        code = ''
+        # clock, reset, control input definition
+        code += self._system_io(self.clock_name, self.reset_name, self.enable_name)
+
+        # general signal definition
+        for tk, tv in terms.items():
+            termtype = self.getTermtype(tk)
+            if signaltype.isInput(termtype) and tk == util.toTermname((self.topmodule, self.reset_name)):
+                continue
+            if signaltype.isInput(termtype) and tk == util.toTermname((self.topmodule, self.clock_name)):
+                continue
+            code += tv.tocode()
+
+        for pk, pv in parameter.items():
+            code += pv.tocode()
+
+        # assign
+        for ak, avv in assign.items():
+            cnt = 0
+            for av in avv:
+                code += av.tocode()
+
+        # always (clock edge)
+        for ck, cvv in always_clockedge.items():
+            for cv in cvv:
+                code += cv.tocode()
+
+        # always (combination)
+        for ck, cvv in always_combination.items():
+            for cv in cvv:
+                code += cv.tocode()
+
+        # module tail
+        moduletail = '\nendmodule\n'
+
+        ret = modulehead + code + moduletail
+
+        if self.flat:
+            ret = re.sub('\.', '_', ret)
+
+        return ret
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/graphgen.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/graphgen.py
new file mode 100644
index 0000000..a23c406
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/graphgen.py
@@ -0,0 +1,188 @@
+# -------------------------------------------------------------------------------
+# graphgen.py
+#
+# Dataflow graph generator (Only Python 2.7)
+#
+# pygraphviz and graphviz are required
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import pygraphviz as pgv
+
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+from pyverilog.dataflow.dataflow import *
+from pyverilog.dataflow.optimizer import VerilogOptimizer
+from pyverilog.dataflow.walker import VerilogDataflowWalker
+import pyverilog.dataflow.reorder as reorder
+import pyverilog.dataflow.replace as replace
+
+
+class VerilogGraphGenerator(object):
+    def visit(self, node, parent, color='black', edge_label=None):
+        method = 'visit_' + node.__class__.__name__
+        visitor = getattr(self, method, self.generic_visit)
+        return visitor(node, parent, color=color, edge_label=edge_label)
+
+    def generic_visit(self, node, parent, color='black', edge_label=None):
+        if node is None:
+            return
+        for c in node.children():
+            self.visit(c, parent, color=color, edge_label=edge_label)
+
+    def __init__(self, topmodule,
+                 terms, binddict, resolved_terms, resolved_binddict, constlist,
+                 filename, withcolor=False):
+        self.topmodule = topmodule
+        self.terms = terms
+        self.binddict = binddict
+        self.resolved_terms = resolved_terms
+        self.resolved_binddict = resolved_binddict
+        self.graph = pgv.AGraph(directed=True)  # pgv.AGraph(strict=False, directed=True)
+        self.filename = filename
+        self.withcolor = withcolor
+
+        self.renamecounter = 0
+        self.identical = False
+        self.treewalker = VerilogDataflowWalker(self.topmodule, self.terms,
+                                                self.binddict, self.resolved_terms,
+                                                self.resolved_binddict, constlist)
+        self.optimizer = VerilogOptimizer(terms, constlist)
+
+    def generate(self, signalname, identical=False, walk=True, step=1, do_reorder=False, delay=False):
+        termname = util.toTermname(signalname)
+        tree = self.treewalker.getTree(termname)
+        if tree is None:
+            raise verror.DefinitionError('No such signals: %s' % str(signalname))
+        if walk:
+            tree = self.treewalker.walkTree(tree, visited=set(), step=step, delay=delay)
+            if do_reorder:
+                tree = reorder.reorder(tree)
+
+        tree = self.optimizer.optimize(tree)
+        if do_reorder:
+            tree = reorder.reorder(tree)
+
+        tree = replace.replaceUndefined(tree, termname)
+
+        name = self.rename(signalname)
+        self.identical = identical
+        self.add_node(name, label=signalname)
+        self.visit(tree, name)
+
+    def draw(self, filename=None):
+        fn = filename
+        if fn is None:
+            fn = self.filename
+        self.graph.write('file.dot')
+        self.graph.layout(prog='dot')
+        self.graph.draw(fn)
+
+    def visit_DFOperator(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        self.generic_visit(node, name, color=color, edge_label=None)
+
+    def visit_DFPartselect(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        if node.var is not None:
+            self.visit(node.var, name, color=color, edge_label='VAR')
+        if node.msb is not None:
+            self.visit(node.msb, name, color='orange', edge_label='MSB')
+        if node.lsb is not None:
+            self.visit(node.lsb, name, color='orange', edge_label='LSB')
+
+    def visit_DFPointer(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        if node.var is not None:
+            self.visit(node.var, name, color=color, edge_label='VAR')
+        if node.ptr is not None:
+            self.visit(node.ptr, name, color='orange', edge_label='PTR')
+
+    def visit_DFConcat(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        self.generic_visit(node, name, color=color)
+
+    def visit_DFBranch(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        if node.condnode is not None:
+            self.visit(node.condnode, name, color='blue', edge_label='COND')
+        if node.truenode is not None:
+            self.visit(node.truenode, name, color='green', edge_label='TRUE')
+        if node.falsenode is not None:
+            self.visit(node.falsenode, name, color='red', edge_label='FALSE')
+
+    def visit_DFTerminal(self, node, parent, color='black', edge_label=None):
+        if self.identical:
+            self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        else:
+            self.add_DF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFIntConst(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFFloatConst(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFStringConst(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFEvalValue(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFUndefined(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFHighImpedance(self, node, parent, color='black', edge_label=None):
+        self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+
+    def visit_DFDelay(self, node, parent, color='black', edge_label=None):
+        name = self.add_RenamedDF(node, parent, color=color, edge_label=edge_label)
+        if node.nextnode is not None:
+            self.visit(node.nextnode, name, color=color)
+
+    def add_DF(self, node, parent, color='black', edge_label=None):
+        #name = node.__repr__()
+        name = node.tolabel()
+        self.add_node(name, color=color)
+        if edge_label:
+            self.add_edge(parent, name, color=color, label=edge_label)
+        else:
+            self.add_edge(parent, name, color=color)
+        return name
+
+    def add_RenamedDF(self, node, parent, color='black', edge_label=None):
+        #mylabel = node.__repr__()
+        mylabel = node.tolabel()
+        name = self.rename(mylabel)
+        self.add_node(name, label=mylabel, color=color)
+        if edge_label:
+            self.add_edge(parent, name, color=color, label=edge_label)
+        else:
+            self.add_edge(parent, name, color=color)
+        return name
+
+    def rename(self, name):
+        ret = name + '_graphrename_' + str(self.renamecounter)
+        self.renamecounter += 1
+        return ret
+
+    def add_node(self, node, label=None, color='black'):
+        if not self.withcolor:
+            color = 'black'
+        if label is None:
+            self.graph.add_node(str(node), color=color)
+        else:
+            self.graph.add_node(str(node), label=label, color=color)
+
+    def add_edge(self, start, end, color='black', label=None):
+        if not self.withcolor:
+            color = 'black'
+        if label:
+            self.graph.add_edge(str(start), str(end), color=color, label=label)
+        else:
+            self.graph.add_edge(str(start), str(end), color=color)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/merge.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/merge.py
new file mode 100644
index 0000000..c3216aa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/merge.py
@@ -0,0 +1,529 @@
+# -------------------------------------------------------------------------------
+# merge.py
+#
+# Merging multiple dataflow definitions into a single dataflow definition
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.utils.verror as verror
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.dataflow.reorder as reorder
+from pyverilog.dataflow.dataflow import *
+from pyverilog.dataflow.visit import *
+from pyverilog.dataflow.optimizer import VerilogOptimizer
+
+
+class VerilogDataflowMerge(object):
+    def __init__(self, topmodule, terms, binddict, resolved_terms, resolved_binddict, constlist):
+        self.topmodule = topmodule
+        self.terms = terms
+        self.binddict = binddict
+        self.resolved_terms = resolved_terms
+        self.resolved_binddict = resolved_binddict
+        self.constlist = constlist
+        self.optimizer = VerilogOptimizer(terms, constlist)
+
+    def getTerm(self, termname):
+        if isinstance(termname, str):
+            for scope in self.terms.keys():
+                if termname == str(scope):
+                    return self.terms[scope]
+        if not termname in self.terms:
+            return None
+        return self.terms[termname]
+
+    def getBindlist(self, termname):
+        if not termname in self.binddict:
+            return ()
+        return self.binddict[termname]
+
+    def getResolvedTerm(self, termname):
+        if not termname in self.resolved_terms:
+            return None
+        return self.resolved_terms[termname]
+
+    def getResolvedBindlist(self, termname):
+        if not termname in self.resolved_binddict:
+            return ()
+        return self.resolved_binddict[termname]
+
+    def getTermtype(self, termname):
+        term = self.getTerm(termname)
+        if term is None:
+            raise verror.DefinitionError('No such Term: %s' % termname)
+        return term.termtype
+
+    def getTermDims(self, termname):
+        term = self.getTerm(termname)
+        if term is None:
+            raise verror.DefinitionError('No such Term: %s' % termname)
+        return term.dims
+
+    def getAssignType(self, termname, bind):
+        termtype = self.getTermtype(termname)
+        if signaltype.isWire(termtype):
+            return 'assign'
+        if signaltype.isWireArray(termtype):
+            return 'assign'
+        if signaltype.isReg(termtype):
+            if bind.isClockEdge():
+                return 'clockedge'
+            return 'combination'
+        if signaltype.isInteger(termtype):
+            if bind.isClockEdge():
+                return 'clockedge'
+            return 'combination'
+        if signaltype.isParameter(termtype):
+            return 'parameter'
+        if signaltype.isLocalparam(termtype):
+            return 'localparam'
+        if signaltype.isOutput(termtype):
+            return 'assign'
+        if signaltype.isInout(termtype):
+            return 'assign'
+        if signaltype.isInput(termtype):
+            return 'assign'
+        if signaltype.isFunction(termtype):
+            return 'assign'
+        if signaltype.isRename(termtype):
+            return 'assign'
+        if signaltype.isGenvar(termtype):
+            return 'genvar'
+        raise verror.DefinitionError('Unexpected Assignment Type: %s : %s' %
+                                     (str(termname), str(termtype)))
+
+    def isCombination(self, termname):
+        bindlist = self.getBindlist(termname)
+        if bindlist is None:
+            return False
+        for bind in bindlist:
+            if bind.isCombination():
+                return True
+        return False
+
+    def getTree(self, termname, ptr=None):
+        bindlist = self.getResolvedBindlist(termname)
+        bindlist = self.getOptimizedBindlist(bindlist)
+        if bindlist is None:
+            return None
+        if len(bindlist) == 0:
+            return None
+
+        if self.getTermDims(termname) is not None:
+            discretebinds = {}
+            for bind in bindlist:
+                if isinstance(bind.ptr, DFEvalValue):
+                    ptrval = bind.ptr.value
+                    if not ptrval in discretebinds:
+                        discretebinds[ptrval] = []
+                    discretebinds[ptrval] += [bind]
+                else:
+                    if not 'any' in discretebinds:
+                        discretebinds['any'] = []
+                    discretebinds['any'] += [bind]
+
+            if 'any' in discretebinds:
+                return DFTerminal(termname)
+
+            if isinstance(ptr, DFEvalValue):
+                if len(discretebinds[ptr.value]) == 0:
+                    return None
+                if len(discretebinds[ptr.value]) == 1:
+                    return discretebinds[ptr.value][0].tree
+                return self.getMergedTree(discretebinds[ptr.value])
+
+            minptr = min(list(discretebinds.keys()))
+            maxptr = max(list(discretebinds.keys()))
+            ret = None
+            for c in range(minptr, maxptr + 1):
+                truetree = None
+                if len(discretebinds[c]) == 0:
+                    continue
+                if len(discretebinds[c]) == 1:
+                    truetree = discretebinds[c][0].tree
+                else:
+                    truetree = self.getMergedTree(discretebinds[c])
+                ret = DFBranch(DFOperator((DFEvalValue(c), ptr), 'Eq'), truetree, ret)
+            return ret
+
+        if len(bindlist) == 1:
+            return bindlist[0].tree
+        new_tree = self.getMergedTree(bindlist)
+        return self.optimizer.optimize(new_tree)
+
+    def getResolvedTree(self, termname, ptr=None):
+        raise verror.ImplementationError()
+
+    def isClockEdge(self, termname, msb=None, lsb=None, ptr=None):
+        bind = self.binddict[termname]
+        return bind[0].isClockEdge()
+
+    def getSources(self, tree):
+        if tree is None:
+            return set()
+        if isinstance(tree, DFConstant):
+            return set()
+        if isinstance(tree, DFUndefined):
+            return set()
+        if isinstance(tree, DFEvalValue):
+            return set()
+        if isinstance(tree, DFTerminal):
+            return set([tree.name, ])
+        if isinstance(tree, DFBranch):
+            ret = set()
+            ret |= self.getSources(tree.condnode)
+            ret |= self.getSources(tree.truenode)
+            ret |= self.getSources(tree.falsenode)
+            return ret
+        if isinstance(tree, DFOperator):
+            nextnodes = []
+            for n in tree.nextnodes:
+                nextnodes.extend(self.getSources(n))
+            return set(nextnodes)
+        if isinstance(tree, DFPartselect):
+            ret = set()
+            ret |= self.getSources(tree.var)
+            ret |= self.getSources(tree.msb)
+            ret |= self.getSources(tree.lsb)
+            return ret
+        if isinstance(tree, DFPointer):
+            ret = set()
+            ret |= self.getSources(tree.var)
+            ret |= self.getSources(tree.ptr)
+            return ret
+        if isinstance(tree, DFConcat):
+            nextnodes = []
+            for n in tree.nextnodes:
+                nextnodes.extend(self.getSources(n))
+            return set(nextnodes)
+        if isinstance(tree, DFDelay):
+            ret = set()
+            ret |= self.getSources(tree.nextnode)
+            return ret
+        raise verror.DefinitionError('Undefined Node Type: %s : %s' % (str(type(tree)), str(tree)))
+
+    def getBindSources(self, termname):
+        sources = set()
+        sources |= self.getTermSources(termname)
+        sources |= self.getBindinfoSources(termname)
+        return sources
+
+    def getTermSources(self, termname):
+        term = self.getTerm(termname)
+        if term is None:
+            return set()
+        sources = set()
+        sources |= self.getTreeSources(term.msb)
+        sources |= self.getTreeSources(term.lsb)
+        if term.dims is not None:
+            for l, r in term.dims:
+                sources |= self.getTreeSources(l)
+                sources |= self.getTreeSources(r)
+        return sources
+
+    def getBindinfoSources(self, termname):
+        bindlist = self.getBindlist(termname)
+        sources = set()
+        for bind in bindlist:
+            sources |= self.getTreeSources(bind.msb)
+            sources |= self.getTreeSources(bind.lsb)
+            sources |= self.getTreeSources(bind.ptr)
+            sources |= self.getTreeSources(bind.tree)
+        return sources
+
+    def getTreeSources(self, tree):
+        if tree is None:
+            return set()
+        if isinstance(tree, DFConstant):
+            return set()
+        if isinstance(tree, DFUndefined):
+            return set()
+        if isinstance(tree, DFEvalValue):
+            return set()
+        if isinstance(tree, DFTerminal):
+            return set([tree.name, ])
+        if isinstance(tree, DFBranch):
+            ret = set()
+            ret |= self.getTreeSources(tree.condnode)
+            ret |= self.getTreeSources(tree.truenode)
+            ret |= self.getTreeSources(tree.falsenode)
+            return ret
+        if isinstance(tree, DFOperator):
+            ret = set()
+            for n in tree.nextnodes:
+                ret |= self.getTreeSources(n)
+            return ret
+        if isinstance(tree, DFPartselect):
+            ret = set()
+            ret |= self.getTreeSources(tree.var)
+            ret |= self.getTreeSources(tree.msb)
+            ret |= self.getTreeSources(tree.lsb)
+            return ret
+        if isinstance(tree, DFPointer):
+            ret = set()
+            ret |= self.getTreeSources(tree.var)
+            ret |= self.getTreeSources(tree.ptr)
+            return ret
+        if isinstance(tree, DFConcat):
+            ret = set()
+            for n in tree.nextnodes:
+                ret |= self.getTreeSources(n)
+            return ret
+        raise verror.DefinitionError('Undefined Node Type: %s : %s' % (str(type(tree)), str(tree)))
+
+    def getMergedTree(self, optimized_bindlist):
+        concatlist = []
+        last_msb = -1
+        last_ptr = -1
+
+        def bindkey(x):
+            lsb = 0 if x.lsb is None else x.lsb.value
+            ptr = 0 if not isinstance(x.ptr, DFEvalValue) else x.ptr.value
+            term = self.getTerm(x.dest)
+            length = abs(self.optimizer.optimize(term.msb).value -
+                         self.optimizer.optimize(term.lsb).value) + 1
+            return ptr * length + lsb
+        for bind in sorted(optimized_bindlist, key=bindkey):
+            lsb = 0 if bind.lsb is None else bind.lsb.value
+            if last_ptr != (-1 if not isinstance(bind.ptr, DFEvalValue) else bind.ptr.value):
+                continue
+            if last_msb + 1 < lsb:
+                concatlist.append(DFUndefined(last_msb - lsb - 1))
+            concatlist.append(bind.tree)
+            last_msb = -1 if bind.msb is None else bind.msb.value
+            last_ptr = -1 if not isinstance(bind.ptr, DFEvalValue) else bind.ptr.value
+        return DFConcat(tuple(reversed(concatlist)))
+
+    def getOptimizedBindlist(self, bindlist):
+        if len(bindlist) == 0:
+            return ()
+        new_bindlist = []
+        for bind in bindlist:
+            tree = self.optimizer.optimize(bind.tree)
+            msb = self.optimizer.optimize(bind.msb)
+            lsb = self.optimizer.optimize(bind.lsb)
+            ptr = self.optimizer.optimize(bind.ptr)
+            new_bind = copy.deepcopy(bind)
+            new_bind.tree = tree
+            new_bind.msb = msb
+            new_bind.lsb = lsb
+            new_bind.ptr = ptr
+            new_bindlist.append(new_bind)
+        if len(new_bindlist) == 1:
+            return (new_bindlist[0],)
+        split_positions = self.splitPositions(tuple(new_bindlist))
+        new_bindlist = self.splitBindlist(tuple(new_bindlist), split_positions)
+        return self.mergeBindlist(tuple(new_bindlist))
+
+    def mergeBindlist(self, bindlist):
+        merged_bindlist = []
+        last_bind = None
+
+        def bindkey(x):
+            lsb = 0 if x.lsb is None else x.lsb.value
+            ptr = 0 if not isinstance(x.ptr, DFEvalValue) else x.ptr.value
+            term = self.getTerm(x.dest)
+            length = abs(self.optimizer.optimize(term.msb).value -
+                         self.optimizer.optimize(term.lsb).value) + 1
+            return ptr * length + lsb
+
+        for bind in sorted(bindlist, key=bindkey):
+            if last_bind is None:
+                merged_bindlist.append(copy.deepcopy(bind))
+                last_bind = copy.deepcopy(bind)
+            elif isinstance(last_bind.ptr, DFEvalValue) and isinstance(bind.ptr, DFEvalValue) and last_bind.ptr.value != bind.ptr.value:
+                merged_bindlist.append(copy.deepcopy(bind))
+                last_bind = copy.deepcopy(bind)
+            elif last_bind.lsb is None or bind.lsb is None or last_bind is None or bind.msb is None:
+                merged_bindlist.append(copy.deepcopy(bind))
+                last_bind = copy.deepcopy(bind)
+            elif last_bind.lsb.value == bind.lsb.value and last_bind.msb.value == bind.msb.value:
+                new_tree = self.mergeTree(last_bind.tree, bind.tree)
+                new_tree = self.optimizer.optimize(new_tree)
+                merged_bindlist.pop()
+                new_bind = copy.deepcopy(bind)
+                new_bind.tree = new_tree
+                merged_bindlist.append(new_bind)
+                last_bind = copy.deepcopy(new_bind)
+            else:
+                merged_bindlist.append(copy.deepcopy(bind))
+                last_bind = copy.deepcopy(bind)
+        return tuple(merged_bindlist)
+
+    def mergeTree(self, first, second):
+        if isinstance(first, DFBranch) and isinstance(second, DFBranch):
+            cond_fst = self.optimizer.optimize(first.condnode)
+            cond_snd = self.optimizer.optimize(second.condnode)
+            if cond_fst == cond_snd:
+                return DFBranch(cond_fst, self.mergeTree(first.truenode, second.truenode), self.mergeTree(first.falsenode, second.falsenode))
+            appended = copy.deepcopy(first)
+            return DFBranch(cond_snd, self.appendTail(appended, second.truenode), self.appendTail(appended, second.falsenode))
+
+        if first is not None and second is None:
+            return first
+        if first is None and second is not None:
+            return second
+
+        if isinstance(first, DFBranch) and second is None:
+            return first
+        if first is None and isinstance(second, DFBranch):
+            return second
+
+        if isinstance(first, DFBranch) and not isinstance(second, DFBranch):
+            cond_fst = self.optimizer.optimize(first.condnode)
+            appended = copy.deepcopy(second)
+            return DFBranch(cond_fst, self.appendTail(appended, first.truenode), self.appendTail(appended, first.falsenode))
+        if not isinstance(first, DFBranch) and isinstance(second, DFBranch):
+            cond_snd = self.optimizer.optimize(second.condnode)
+            appended = copy.deepcopy(first)
+            return DFBranch(cond_snd, self.appendTail(appended, second.truenode), self.appendTail(appended, second.falsenode))
+
+        if not isinstance(first, DFBranch) and not isinstance(second, DFBranch):
+            return second
+
+        raise verror.FormatError('Can not merge trees.')
+
+    def appendTail(self, appended, target):
+        if target is None:
+            return copy.deepcopy(appended)
+        if isinstance(target, DFBranch):
+            return DFBranch(target.condnode, self.appendTail(appended, target.truenode), self.appendTail(appended, target.falsenode))
+        return target
+
+    def splitBindlist(self, bindlist, split_positions):
+        if len(bindlist) == 0:
+            return ()
+        return self.splitBindPositions(bindlist[0], split_positions) + self.splitBindlist(bindlist[1:], split_positions)
+
+    def splitBindPositions(self, bind, split_positions):
+        if len(split_positions) == 0:
+            return (copy.deepcopy(bind),)
+        if bind is None:
+            return (copy.deepcopy(bind),)
+        bind_left, bind_right = self.splitBind(bind, split_positions[0])
+        ret = () if bind_right is None else (bind_right,)
+        return ret + self.splitBindPositions(bind_left, split_positions[1:])
+
+    def splitBind(self, bind, splitpos):
+        tree = bind.tree
+        msb = self.optimizer.optimizeConstant(bind.msb)
+        lsb = self.optimizer.optimizeConstant(bind.lsb)
+        ptr = self.optimizer.optimizeConstant(bind.ptr)
+        if ptr is not None and msb is None or lsb is None:
+            if self.getTermDims(bind.dest) is not None:
+                msb = self.optimizer.optimizeConstant(copy.deepcopy(term.msb))
+                lsb = self.optimizer.optimizeConstant(copy.deepcopy(term.lsb))
+            else:
+                msb = copy.deepcopy(ptr)
+                lsb = copy.deepcopy(ptr)
+        if ptr is None and msb is None or lsb is None:
+            term = self.getTerm(bind.dest)
+            msb = self.optimizer.optimizeConstant(copy.deepcopy(term.msb))
+            lsb = self.optimizer.optimizeConstant(copy.deepcopy(term.lsb))
+        if splitpos > lsb.value and splitpos <= msb.value:  # split
+            right_lsb = lsb.value
+            right_msb = splitpos - 1
+            right_width = splitpos - lsb.value
+            left_lsb = splitpos
+            left_msb = msb.value
+            left_width = msb.value - splitpos + 1
+            right_tree = reorder.reorder(DFPartselect(copy.deepcopy(
+                tree), DFEvalValue(right_width - 1), DFEvalValue(0)))
+            left_tree = reorder.reorder(DFPartselect(copy.deepcopy(tree), DFEvalValue(
+                msb.value), DFEvalValue(msb.value - left_width + 1)))
+            right_tree = self.optimizer.optimize(right_tree)
+            left_tree = self.optimizer.optimize(left_tree)
+            left_bind = copy.deepcopy(bind)
+            left_bind.tree = left_tree
+            left_bind.msb = DFEvalValue(left_msb)
+            left_bind.lsb = DFEvalValue(left_lsb)
+            right_bind = copy.deepcopy(bind)
+            right_bind.tree = right_tree
+            right_bind.msb = DFEvalValue(right_msb)
+            right_bind.lsb = DFEvalValue(right_lsb)
+            return left_bind, right_bind
+        return bind, None
+
+    def splitPositions(self, bindlist):
+        split_positions = set([])
+        assigned_range = []  # (msb, lsb, ptr)
+
+        for bind in bindlist:
+            ptr = self.optimizer.optimizeConstant(bind.ptr)
+            msb = self.optimizer.optimizeConstant(bind.msb)
+            lsb = self.optimizer.optimizeConstant(bind.lsb)
+            if msb is None and lsb is None:
+                term = self.getTerm(bind.dest)
+                msb = self.optimizer.optimizeConstant(term.msb)
+                lsb = self.optimizer.optimizeConstant(term.lsb)
+            elif not isinstance(msb, DFEvalValue) or not isinstance(lsb, DFEvalValue):
+                raise FormatError('MSB and LSB should be constant.')
+
+            if ptr is None or isinstance(ptr, DFEvalValue):
+                ptrval = None if ptr is None else ptr.value
+                matched_range = self.matchedRange(
+                    tuple(assigned_range), msb.value, lsb.value, ptrval)
+                unmatched_range = self.unmatchedRange(
+                    tuple(matched_range), msb.value, lsb.value, ptrval)
+                split_positions |= self.getPositionsFromRange(matched_range, ptrval)
+                assigned_range += matched_range + unmatched_range
+
+        return tuple(sorted(list(split_positions)))
+
+    def getPositionsFromRange(self, matched_range, search_ptr):
+        positions = set([])
+        for msb, lsb, ptr in matched_range:
+            if search_ptr is not None and search != ptr:
+                continue
+            positions.add(lsb)
+            positions.add(msb + 1)
+        return positions
+
+    def matchedRange(self, assigned_range, search_msb, search_lsb, search_ptr):
+        matched_range = []
+        for msb, lsb, ptr in assigned_range:
+            match = False
+            if search_ptr is not None and ptr != search_ptr:
+                continue
+            if lsb <= search_lsb and search_lsb <= msb:
+                match = True
+                match_lsb = search_lsb
+            else:
+                match_lsb = lsb
+            if lsb <= search_msb and search_msb <= msb:
+                match = True
+                match_msb = search_msb
+            else:
+                match_msb = msb
+            if match:
+                matched_range.append((match_msb, match_lsb, search_ptr))
+        return tuple(matched_range)
+
+    def unmatchedRange(self, matched_range, search_msb, search_lsb, search_ptr):
+        unmatched_range = []
+        minval = None
+        maxval = None
+        last_msb = None
+        for msb, lsb, ptr in sorted(matched_range, key=lambda x: x[0]):
+            if search_ptr is not None and ptr != search_ptr:
+                continue
+            if minval is None or lsb < minval:
+                minval = lsb
+            if maxval is None or msb > maxval:
+                maxval = msb
+            if last_msb is not None and last_msb + 1 > lsb:
+                unmatched_range.append((last_msb + 1, lsb - 1, ptr))
+            last_msb = msb
+        if minval is None and maxval is None:
+            return ((search_msb, search_lsb, search_ptr), )
+        if search_lsb < minval:
+            unmatched_range.append((search_lsb, minval - 1, search_ptr))
+        if maxval < search_msb:
+            unmatched_range.append((maxval + 1, search_msb, search_ptr))
+        return tuple(unmatched_range)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/modulevisitor.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/modulevisitor.py
new file mode 100644
index 0000000..3d24200
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/modulevisitor.py
@@ -0,0 +1,73 @@
+# -------------------------------------------------------------------------------
+# modulevisitor.py
+#
+# Module definition visitor
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.vparser.parser
+from pyverilog.vparser.ast import *
+from pyverilog.dataflow.visit import *
+
+
+class ModuleVisitor(NodeVisitor):
+    def __init__(self):
+        self.moduleinfotable = ModuleInfoTable()
+
+    def visit_ModuleDef(self, node):
+        self.moduleinfotable.addDefinition(node.name, node)
+        self.generic_visit(node)
+
+    def visit_Portlist(self, node):
+        self.moduleinfotable.addPorts(node.ports)
+
+    def visit_Input(self, node):
+        self.moduleinfotable.addSignal(node.name, node)
+
+    def visit_Output(self, node):
+        self.moduleinfotable.addSignal(node.name, node)
+
+    def visit_Inout(self, node):
+        self.moduleinfotable.addSignal(node.name, node)
+
+    def visit_Parameter(self, node):
+        self.moduleinfotable.addConst(node.name, node)
+        self.moduleinfotable.addParamName(node.name)
+
+    def visit_Locaparam(self, node):
+        self.moduleinfotable.addConst(node.name, node)
+
+    # Skip Rule
+    def visit_Function(self, node):
+        pass
+
+    def visit_Task(self, node):
+        pass
+
+    def visit_Always(self, node):
+        pass
+
+    def visit_Initial(self, node):
+        pass
+
+    def visit_InstanceList(self, node):
+        pass
+
+    def visit_Instance(self, node):
+        pass
+
+    def visit_Pragma(self, node):
+        pass
+
+    # get functions
+    def get_modulenames(self):
+        return self.moduleinfotable.get_names()
+
+    def get_moduleinfotable(self):
+        return self.moduleinfotable
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/optimizer.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/optimizer.py
new file mode 100644
index 0000000..b348416
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/optimizer.py
@@ -0,0 +1,1032 @@
+# -------------------------------------------------------------------------------
+# optimizer.py
+#
+# Dataflow optimizer
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import math
+
+import pyverilog.utils.verror as verror
+import pyverilog.utils.signaltype as signaltype
+from pyverilog.dataflow.dataflow import *
+
+
+class VerilogOptimizer(object):
+    default_width = 32
+    compare_ops = ('LessThan', 'GreaterThan', 'LassEq', 'GreaterEq', 'Eq', 'NotEq', 'Eql', 'NotEql')
+
+    def __init__(self, terms, constlist=None, default_width=32, level=2):
+        self.terms = terms
+        self.constlist = constlist if constlist is not None else {}
+        self.default_width = default_width
+        self.level = level
+
+    def setConstant(self, name, value):
+        self.constlist[name] = value
+
+    def resetConstant(self, name):
+        if name in self.constlist:
+            del self.constlist[name]
+
+    def getConstant(self, name):
+        if not name in self.constlist:
+            raise verror.DefinitionError('constant value not found: %s' % str(name))
+        return self.constlist[name]
+
+    def hasConstant(self, name):
+        return name in self.constlist
+
+    def getConstlist(self):
+        return self.constlist
+
+    def setTerm(self, name, term):
+        self.terms[name] = term
+
+    def getTerm(self, name):
+        return self.terms[name]
+
+    def hasTerm(self, name):
+        return name in self.terms
+
+    def optimize(self, tree):
+        t = tree
+        for i in range(self.level):
+            t = self.optimizeConstant(t)
+            t = self.optimizeHierarchy(t)
+        return t
+
+    def optimizeConstant(self, tree):
+        if tree is None:
+            return None
+        if isinstance(tree, DFBranch):
+            condnode = self.optimizeConstant(tree.condnode)
+            truenode = self.optimizeConstant(tree.truenode)
+            falsenode = self.optimizeConstant(tree.falsenode)
+            if isinstance(condnode, DFEvalValue):
+                if self.isCondTrue(condnode):
+                    return truenode
+                return falsenode
+            return DFBranch(condnode, truenode, falsenode)
+
+        if isinstance(tree, DFEvalValue):
+            return tree
+        if isinstance(tree, DFUndefined):
+            return tree
+        if isinstance(tree, DFHighImpedance):
+            return tree
+        if isinstance(tree, DFDelay):
+            raise FormatError('Can not evaluate and optimize a DFDelay')
+            # return tree
+
+        if isinstance(tree, DFIntConst):
+            if 'x' in tree.value or 'z' in tree.value:
+                return DFUndefined(tree.width())
+            if 'X' in tree.value or 'Z' in tree.value:
+                return DFUndefined(tree.width())
+            return DFEvalValue(tree.eval(), tree.width())
+        if isinstance(tree, DFFloatConst):
+            return DFEvalValue(tree.eval(), self.default_width, isfloat=True)
+        if isinstance(tree, DFStringConst):
+            return DFEvalValue(tree.eval(), None, isstring=True)
+        if isinstance(tree, DFConstant):
+            if 'x' in tree.value or 'z' in tree.value:
+                return DFUndefined()
+            if 'X' in tree.value or 'Z' in tree.value:
+                return DFUndefined()
+            return DFEvalValue(tree.eval(), self.default_width)
+
+        if isinstance(tree, DFOperator):
+            nextnodes_rslts, all_const = self.evalNextnodes(tree.nextnodes)
+            if all_const:
+                evalop = self.evalOperator(tree.operator, nextnodes_rslts)
+                if evalop is not None:
+                    return evalop
+            return DFOperator(tuple(nextnodes_rslts), tree.operator)
+
+        if isinstance(tree, DFTerminal):
+            if not self.hasConstant(tree.name):
+                return tree
+            msb = self.getTerm(tree.name).msb
+            lsb = self.getTerm(tree.name).lsb
+            const = self.getConstant(tree.name)
+            constwidth = const.width
+            if msb is not None and lsb is not None:
+                msb_val = self.optimizeConstant(msb)
+                lsb_val = self.optimizeConstant(lsb)
+                if isinstance(msb_val, DFEvalValue) and isinstance(lsb_val, DFEvalValue):
+                    constwidth = msb_val.value - lsb_val.value + 1
+            return DFEvalValue(const.value, constwidth)
+
+        if isinstance(tree, DFConcat):
+            nextnodes_rslts, all_const = self.evalNextnodes(tree.nextnodes)
+            if all_const:
+                evalcc = self.evalConcat(nextnodes_rslts)
+                if evalcc is not None:
+                    return evalcc
+            return DFConcat(tuple(nextnodes_rslts))
+
+        if isinstance(tree, DFPartselect):
+            var = self.optimizeConstant(tree.var)
+            msb = self.optimizeConstant(tree.msb)
+            lsb = self.optimizeConstant(tree.lsb)
+            if isinstance(var, DFEvalValue) and isinstance(msb, DFEvalValue) and isinstance(msb, DFEvalValue):
+                evalcc = self.evalPartselect(var, msb, lsb)
+                return evalcc
+            return DFPartselect(var, msb, lsb)
+
+        if isinstance(tree, DFPointer):
+            if not isinstance(tree.var, DFTerminal):
+                return tree
+            term = self.getTerm(tree.var.name)
+            var = self.optimizeConstant(tree.var)
+            ptr = self.optimizeConstant(tree.ptr)
+            if term.dims is not None:
+                return DFPointer(var, ptr)
+            if isinstance(var, DFEvalValue) and isinstance(ptr, DFEvalValue):
+                evalcc = self.evalPointer(var, ptr)
+                return evalcc
+            return DFPointer(var, ptr)
+
+        if isinstance(tree, DFSyscall):
+            return DFSyscall(tree.syscall, tuple([self.optimizeConstant(n) for n in tree.nextnodes]))
+
+        raise verror.DefinitionError('Can not optimize the tree: %s %s' %
+                                     (str(type(tree)), str(tree)))
+
+    def evalNextnodes(self, nextnodes):
+        ret = []
+        all_const = True
+        for n in nextnodes:
+            rslt = self.optimizeConstant(n)
+            ret.append(rslt)
+            if not isinstance(rslt, DFEvalValue):
+                all_const = False
+        return tuple(ret), all_const
+
+    def evalOperator(self, operator, nextnodes):
+        valuelist = []
+        width = 0
+        for n in nextnodes:
+            if not isinstance(n, DFEvalValue):
+                return None
+            valuelist.append(n.value)
+            if n.width > width:
+                width = n.width
+        rslt = self._evalOperator(operator, tuple(valuelist), width)
+        return DFEvalValue(rslt, width)
+
+    def _evalOperator(self, operator, valuelist, width=default_width):
+        if operator == 'Uminus':
+            return -1 * valuelist[0]
+        if operator == 'Ulnot':
+            if valuelist[0] == 0:
+                return 1
+            return 0
+        if operator == 'Unot':
+            retval = 0
+            for i in range(width):
+                if valuelist[0] & (1 << i) == 0:
+                    retval |= (1 << i)
+            return retval
+        if operator == 'Uand':
+            for i in range(width):
+                if valuelist[0] & (1 << i) == 0:
+                    return 0
+            return 1
+        if operator == 'Unand':
+            for i in range(width):
+                if valuelist[0] & (1 << i) == 0:
+                    return 1
+            return 0
+        if operator == 'Uor':
+            for i in range(width):
+                if valuelist[0] & (1 << i) != 0:
+                    return 1
+            return 0
+        if operator == 'Unor':
+            for i in range(width):
+                if valuelist[0] & (1 << i) != 0:
+                    return 0
+            return 1
+        if operator == 'Uxor':
+            rslt = 0
+            for i in range(width):
+                if valuelist[0] & (1 << i) != 0:
+                    rslt = 1 if rslt == 0 else 0
+            return rslt
+        if operator == 'Uxnor':
+            rslt = 1
+            for i in range(width):
+                if valuelist[0] & (1 << i) != 0:
+                    rslt = 1 if rslt == 0 else 0
+            return rslt
+        if operator == 'Power':
+            return valuelist[0] ** valuelist[1]
+        if operator == 'Times':
+            return valuelist[0] * valuelist[1]
+        if operator == 'Divide':
+            value = valuelist[0] / valuelist[1]
+            if isinstance(valuelist[0], int) and isinstance(valuelist[1], int):
+                return int(value)
+            return value
+        if operator == 'Mod':
+            return valuelist[0] % valuelist[1]
+        if operator == 'Plus':
+            return valuelist[0] + valuelist[1]
+        if operator == 'Minus':
+            return valuelist[0] - valuelist[1]
+        if operator == 'Sll':
+            return valuelist[0] << valuelist[1]
+        if operator == 'Srl':
+            return valuelist[0] >> valuelist[1]
+        if operator == 'Sra':
+            return valuelist[0] >> valuelist[1]
+
+        if operator == 'LessThan':
+            return 1 if valuelist[0] < valuelist[1] else 0
+        if operator == 'GreaterThan':
+            return 1 if valuelist[0] > valuelist[1] else 0
+        if operator == 'LessEq':
+            return 1 if valuelist[0] <= valuelist[1] else 0
+        if operator == 'GreaterEq':
+            return 1 if valuelist[0] >= valuelist[1] else 0
+        if operator == 'Eq':
+            return 1 if valuelist[0] == valuelist[1] else 0
+        if operator == 'NotEq':
+            return 1 if valuelist[0] != valuelist[1] else 0
+        if operator == 'Eql':
+            return 1 if valuelist[0] == valuelist[1] else 0
+        if operator == 'NotEql':
+            return 1 if valuelist[0] != valuelist[1] else 0
+        if operator == 'And':
+            return valuelist[0] & valuelist[1]
+        if operator == 'Xor':
+            return valuelist[0] ^ valuelist[1]
+        if operator == 'Xnor':
+            return ~(valuelist[0] ^ valuelist[1])
+        if operator == 'Or':
+            return valuelist[0] | valuelist[1]
+        if operator == 'Land':
+            return 1 if valuelist[0] and valuelist[1] else 0
+        if operator == 'Lor':
+            return 1 if valuelist[0] or valuelist[1] else 0
+        return None
+
+    def getWidth(self, node):
+        if node is None:
+            return self.default_width
+        if isinstance(node, DFUndefined):
+            if node.width is not None:
+                return node.width
+            return self.default_width
+        if isinstance(node, DFHighImpedance):
+            if node.width is not None:
+                return node.width
+            return self.default_width
+        if isinstance(node, DFIntConst):
+            return node.width()
+        if isinstance(node, DFConstant):
+            return self.default_width
+        if isinstance(node, DFEvalValue):
+            if node.width is not None:
+                return node.width
+            return self.default_width
+        if isinstance(node, DFTerminal):
+            term = self.getTerm(node.name)
+            msb = self.optimizeConstant(term.msb).value
+            lsb = self.optimizeConstant(term.lsb).value
+            width = abs(msb - lsb) + 1
+            return width
+
+        if isinstance(node, DFBranch):
+            truewidth = self.getWidth(node.truenode)
+            falsewidth = self.getWidth(node.falsenode)
+            return max(truewidth, falsewidth)
+
+        if isinstance(node, DFPartselect):
+            msb = self.optimizeConstant(node.msb).value
+            lsb = self.optimizeConstant(node.lsb).value
+            width = abs(msb - lsb) + 1
+            return width
+        if isinstance(node, DFOperator):
+            if node.operator in self.compare_ops:
+                return 1
+            if node.operator == 'Land' or node.operator == 'Lor':
+                return 1
+            maxwidth = 0
+            for n in node.nextnodes:
+                width = self.getWidth(n)
+                if maxwidth < width:
+                    maxwidth = width
+            return maxwidth
+        if isinstance(node, DFConcat):
+            sumwidth = 0
+            for n in node.nextnodes:
+                width = self.getWidth(n)
+                sumwidth += width
+            return sumwidth
+        if isinstance(node, DFPointer):
+            if not isinstance(node.var, DFTerminal):
+                return 1
+            term = self.getTerm(node.var.name)
+            if term.dims is not None:
+                msb = self.optimizeConstant(term.msb).value
+                lsb = self.optimizeConstant(term.lsb).value
+                width = abs(msb - lsb) + 1
+                return width
+            return 1
+        if isinstance(tree, DFSyscall):
+            return self.default_width
+
+        raise FormatError('Illegal Pointer in getWidth()')
+
+    def evalConcat(self, nextnodes):
+        concatval = 0
+        sum_width = 0
+        for node in nextnodes:
+            width = self.getWidth(node)
+            sum_width += width
+            concatval = (concatval << width) | node.value
+        return DFEvalValue(concatval, sum_width)
+
+    def isCondTrue(self, cond):
+        if not isinstance(cond, DFEvalValue):
+            raise FormatError('Can not evaluate the branch condition.')
+        if cond.value == 0:
+            return False
+        return True
+
+    def evalPartselect(self, var, msb, lsb):
+        width = msb.value - lsb.value + 1
+        partval = var.value >> lsb.value
+        if partval >= 2 ** width:
+            partval = partval % (2 ** width)
+        return DFEvalValue(partval, width)
+
+    def evalPointer(self, var, ptr):
+        ptrval = (var >> ptr) & 0x1
+        return DFEvalValue(ptrval, 1)
+
+    def optimizeHierarchy(self, tree):
+        if tree is None:
+            return None
+        if isinstance(tree, DFIntConst):
+            return tree
+        if isinstance(tree, DFFloatConst):
+            return tree
+        if isinstance(tree, DFStringConst):
+            return tree
+        if isinstance(tree, DFEvalValue):
+            return tree
+        if isinstance(tree, DFUndefined):
+            return tree
+        if isinstance(tree, DFHighImpedance):
+            return tree
+        if isinstance(tree, DFTerminal):
+            return tree
+        if isinstance(tree, DFBranch):
+            condnode = self.optimizeHierarchy(tree.condnode)
+            truenode = self.optimizeHierarchy(tree.truenode)
+            falsenode = self.optimizeHierarchy(tree.falsenode)
+            if isinstance(condnode, DFEvalValue):
+                if self.isCondTrue(condnode):
+                    return truenode
+                return falsenode
+            if truenode == falsenode:
+                return truenode
+            return DFBranch(condnode, truenode, falsenode)
+        if isinstance(tree, DFOperator):
+            nextnodes = []
+            for n in tree.nextnodes:
+                nextnodes.append(self.optimizeHierarchy(n))
+            ret = DFOperator(tuple(nextnodes), tree.operator)
+            ret = self.replaceOperator(ret)
+            ret = self.mergeIdenticalNodes(ret)
+            ret = self.mergeStaticNodes(ret)
+            ret = self.mergeLandLor(ret)
+            return ret
+        if isinstance(tree, DFPartselect):
+            msb = self.optimizeHierarchy(tree.msb)
+            lsb = self.optimizeHierarchy(tree.lsb)
+            var = self.optimizeHierarchy(tree.var)
+            if isinstance(var, DFConcat) and isinstance(msb, DFEvalValue) and isinstance(lsb, DFEvalValue):
+                return self.takePart(var.nextnodes, msb, lsb)
+            if isinstance(msb, DFEvalValue) and isinstance(lsb, DFEvalValue) and lsb.value == 0 and self.getWidth(var) == (msb.value + 1):
+                return var
+            return DFPartselect(var, msb, lsb)
+        if isinstance(tree, DFPointer):
+            ptr = self.optimizeHierarchy(tree.ptr)
+            var = self.optimizeHierarchy(tree.var)
+            if isinstance(var, DFConcat) and isinstance(ptr, DFEvalValue):
+                return self.takePoint(var.nextnodes, ptr)
+            return DFPointer(var, ptr)
+        if isinstance(tree, DFConcat):
+            nextnodes = []
+            for n in tree.nextnodes:
+                if isinstance(n, DFConcat):
+                    nextnodes.extend(n.nextnodes)
+                    continue
+                nextnodes.append(self.optimizeHierarchy(n))
+            return self.mergeConcat(DFConcat(tuple(nextnodes)))
+        if isinstance(tree, DFSyscall):
+            return DFSyscall(tree.syscall, tuple([self.optimizeHierarchy(n) for n in tree.nextnodes]))
+
+        raise FormatError('Can not merge due to unrecognized type of tree')
+
+    def takePoint(self, nextnodes, ptr):
+        return self.takePart(nextnodes, ptr, ptr)
+
+    def takePart(self, nextnodes, msb, lsb):
+        widlist = []
+        for n in reversed(nextnodes):  # from LSB
+            widlist.append(self.getWidth(n))
+        lsbcut = min(msb.value, lsb.value)
+        msbcut = max(msb.value, lsb.value)
+        cutwidth = msbcut - lsbcut + 1
+
+        widsum = 0
+        widpos = 1
+        widoffset = 0
+        usednodes = []
+        lsb = -1
+        msb = -1
+        lsboffset = -1
+        msboffset = -1
+        use = False
+        for w in widlist:  # from LSB
+            if lsbcut >= widoffset and lsbcut < widoffset + w:
+                lsb = widoffset
+                lsboffset = lsbcut - lsb
+                use = True
+            if use:
+                widsum += w
+                usednodes.append(self.optimizeConstant(nextnodes[-widpos]))
+            if msbcut >= widoffset and msbcut < widoffset + w:
+                msb = widoffset + w - 1
+                msboffset = msb - msbcut
+                break
+            widpos += 1
+            widoffset += w
+
+        usednodes.reverse()
+
+        if len(usednodes) == 0:
+            return DFUndefined(cutwidth)
+        if msboffset < 0:
+            if lsboffset == 0:
+                return DFConcat((DFUndefined(cutwidth - widsum),) + tuple(usednodes))
+            if len(usednodes) == 1:
+                return DFConcat((DFUndefined(cutwidth - widsum + lsboffset), DFPartselect(usednodes[0], DFEvalValue(widsum - 1), DFEvalValue(lsb + lsboffset))))
+            return DFConcat((DFUndefined(cutwidth - widsum + lsboffset), DFPartselect(DFConcat(tuple(usednodes)), DFEvalValue(widsum - 1), DFEvalValue(lsb + lsboffset))))
+        if lsboffset == 0 and msboffset == 0:
+            if len(usednodes) == 1:
+                return usednodes[0]
+            return DFConcat(tuple(usednodes))
+
+        if len(usednodes) == 1:
+            return DFPartselect(usednodes[0], DFEvalValue(msb - msboffset), DFEvalValue(lsb + lsboffset))
+
+        ret_usednodes = []
+        usednodes_cnt = 0
+        for node in reversed(usednodes):  # from LSB
+            if usednodes_cnt == 0 and lsboffset > 0:
+                lsbval = lsboffset
+                msbval = widlist[usednodes_cnt] - 1
+                ret_usednodes.append(self.optimizeConstant(
+                    DFPartselect(node, DFEvalValue(msbval), DFEvalValue(lsbval))))
+            elif usednodes_cnt == len(usednodes) - 1 and msboffset > 0:
+                lsbval = 0
+                msbval = widlist[usednodes_cnt] - msboffset - 1
+                ret_usednodes.append(self.optimizeConstant(
+                    DFPartselect(node, DFEvalValue(msbval), DFEvalValue(lsbval))))
+            else:
+                ret_usednodes.append(self.optimizeConstant(node))
+            usednodes_cnt += 1
+        ret_usednodes.reverse()
+        return DFPartselect(DFConcat(tuple(ret_usednodes)), DFEvalValue(msb - msboffset), DFEvalValue(lsb + lsboffset))
+
+    def _isPowerOf2(self, value):
+        if value <= 0:
+            return False
+        p = math.log(value, 2)
+        if p % 1.0 == 0:
+            return True
+        return False
+
+    def replaceOperator(self, node):
+        if not isinstance(node, DFOperator):
+            return node
+        if (node.operator == 'Times' and
+            (isinstance(node.nextnodes[1], DFEvalValue) and
+             isinstance(node.nextnodes[1].value, int) and
+             self._isPowerOf2(node.nextnodes[1].value))):
+            return DFOperator((node.nextnodes[0], DFEvalValue(int(math.log(node.nextnodes[1].value, 2)))), 'Sll')
+        if (node.operator == 'Times' and
+            (isinstance(node.nextnodes[0], DFEvalValue) and
+             isinstance(node.nextnodes[0].value, int) and
+             self._isPowerOf2(node.nextnodes[0].value))):
+            return DFOperator((node.nextnodes[1], DFEvalValue(int(math.log(node.nextnodes[0].value, 2)))), 'Sll')
+        if (node.operator == 'Divide'
+            and (isinstance(node.nextnodes[1], DFEvalValue) and
+             isinstance(node.nextnodes[1].value, int) and
+                 self._isPowerOf2(node.nextnodes[1].value))):
+            return DFOperator((node.nextnodes[0], DFEvalValue(int(math.log(node.nextnodes[1].value, 2)))), 'Sra')
+        return node
+
+    def mergeConcat(self, concatnode):
+        t = concatnode
+        if isinstance(t, DFConcat):
+            t = self.mergeConcat_constant(t)
+        if isinstance(t, DFConcat):
+            t = self.mergeConcat_undefined(t)
+        if isinstance(t, DFConcat):
+            t = self.mergeConcat_partselect(t)
+        if isinstance(t, DFConcat):
+            t = self.mergeConcat_branch(t)
+        return t
+
+    def mergeConcat_constant(self, concatnode):
+        ret_nodes = []
+        constvallist = []
+        constval = 0
+        for n in concatnode.nextnodes:
+            if isinstance(n, DFEvalValue):
+                constvallist.append(n)
+                constval = self.evalConcat(tuple(constvallist))
+                if len(constvallist) > 1:
+                    ret_nodes.pop()
+                ret_nodes.append(constval)
+            else:
+                constvallist = []
+                ret_nodes.append(n)
+        return DFConcat(tuple(ret_nodes))
+
+    def mergeConcat_undefined(self, concatnode):
+        ret_nodes = []
+        width = 0
+        for n in concatnode.nextnodes:
+            if isinstance(n, DFUndefined):
+                if width > 0:
+                    ret_nodes.pop()
+                width += self.getWidth(n)
+                ret_nodes.append(DFUndefined(width))
+            else:
+                width = 0
+                ret_nodes.append(n)
+        return DFConcat(tuple(ret_nodes))
+
+    def mergeConcat_partselect(self, concatnode):
+        ret_nodes = []
+        last_node = None
+        for n in concatnode.nextnodes:
+            if last_node is None:
+                pass
+            elif not isinstance(last_node, DFPartselect):
+                pass
+            elif not isinstance(n, DFPartselect):
+                pass
+            elif not isinstance(last_node.var, DFTerminal):
+                pass
+            elif not isinstance(n.var, DFTerminal):
+                pass
+            elif last_node.var.name != n.var.name:
+                pass
+            elif last_node.lsb.value == n.msb.value + 1:
+                ret_nodes.pop()
+                new_node = DFPartselect(last_node.var, last_node.msb, n.lsb)
+                if self.getWidth(last_node.var) == (last_node.msb.value - n.lsb.value + 1):
+                    new_node = last_node.var
+                ret_nodes.append(new_node)
+                last_node = new_node
+                continue
+            ret_nodes.append(n)
+            last_node = n
+        if len(ret_nodes) == 1:
+            return ret_nodes[0]
+        return DFConcat(tuple(ret_nodes))
+
+    def mergeConcat_branch(self, concatnode):
+        nodelist = []
+        last_node = None
+        for n in concatnode.nextnodes:
+            if last_node is None:
+                pass
+            elif not isinstance(last_node, DFBranch):
+                pass
+            elif not isinstance(n, DFBranch):
+                pass
+            elif last_node.condnode == n.condnode:
+                truenode_list = (last_node.truenode, n.truenode)
+                falsenode_list = (last_node.falsenode, n.falsenode)
+                new_truenode_list = []
+                new_falsenode_list = []
+                pos = 0
+                for t in truenode_list:
+                    if t is None:
+                        new_truenode_list.append(DFUndefined(self.getWidth(falsenode_list[pos])))
+                    else:
+                        new_truenode_list.append(t)
+                    pos += 1
+
+                pos = 0
+                for f in falsenode_list:
+                    if f is None:
+                        new_falsenode_list.append(DFUndefined(self.getWidth(truenode_list[pos])))
+                    else:
+                        new_falsenode_list.append(f)
+                    pos += 1
+
+                new_node = DFBranch(last_node.condnode, DFConcat(
+                    tuple(new_truenode_list)), DFConcat(tuple(new_falsenode_list)))
+                last_node = new_node
+                nodelist.pop()
+                nodelist.append(new_node)
+                continue
+            nodelist.append(n)
+            last_node = n
+        if len(nodelist) == 1:
+            return nodelist[0]
+        return DFConcat(tuple(nodelist))
+
+    def mergeIdenticalNodes(self, node):
+        if not isinstance(node, DFOperator):
+            return node
+        if len(node.nextnodes) == 1:
+            return node
+        if not (node.nextnodes[0] == node.nextnodes[1]):
+            return node
+        if node.operator == 'And':
+            return node.nextnodes[0]
+        if node.operator == 'Or':
+            return node.nextnodes[0]
+        if node.operator == 'Land':
+            return node.nextnodes[0]
+        if node.operator == 'Lor':
+            return node.nextnodes[0]
+        if node.operator == 'LessThan':
+            return DFEvalValue(0, 1)  # value, width
+        if node.operator == 'GreaterThan':
+            return DFEvalValue(0, 1)
+        if node.operator == 'LessEq':
+            return DFEvalValue(1, 1)
+        if node.operator == 'GreaterEq':
+            return DFEvalValue(1, 1)
+        if node.operator == 'Eq':
+            return DFEvalValue(1, 1)
+        if node.operator == 'NotEq':
+            return DFEvalValue(0, 1)
+        if node.operator == 'Eql':
+            return DFEvalValue(1, 1)
+        if node.operator == 'NotEql':
+            return DFEvalValue(0, 1)
+        return node
+
+    def mergeStaticNodes(self, node):
+        if not isinstance(node, DFOperator):
+            return node
+        if len(node.nextnodes) == 1:
+            return node
+
+        left = node.nextnodes[0]
+        right = node.nextnodes[1]
+
+        if node.operator == 'And':
+            if isinstance(left, DFEvalValue) and left.value == 0:
+                return DFEvalValue(0, self.getWidth(node))
+            if isinstance(right, DFEvalValue) and right.value == 0:
+                return DFEvalValue(0, self.getWidth(node))
+            if isinstance(left, DFOperator) and left.operator == 'Unot'\
+                    and left.nextnodes[0] == right:
+                return DFEvalValue(0, self.getWidth(node))
+            if isinstance(right, DFOperator) and right.operator == 'Unot'\
+                    and right.nextnodes[0] == left:
+                return DFEvalValue(0, self.getWidth(node))
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and left.nextnodes[0] == right:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(0, 1)
+                else:
+                    return node
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and right.nextnodes[0] == left:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(0, 1)
+                else:
+                    return node
+            return node
+        if node.operator == 'Or':
+            if isinstance(left, DFEvalValue) and left.value == 0:
+                return right
+            if isinstance(right, DFEvalValue) and right.value == 0:
+                return left
+            if isinstance(left, DFOperator) and left.operator == 'Unot'\
+                    and left.nextnodes[0] == right:
+                return DFEvalValue(self._evalOperator('Unot', [0, ], self.getWidth(node)), self.getWidth(node))
+            if isinstance(right, DFOperator) and right.operator == 'Unot'\
+                    and right.nextnodes[0] == left:
+                return DFEvalValue(self._evalOperator('Unot', [0, ], self.getWidth(node)), self.getWidth(node))
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and left.nextnodes[0] == right:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(1, 1)
+                else:
+                    return node
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and right.nextnodes[0] == left:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(1, 1)
+                else:
+                    return node
+            return node
+        if node.operator == 'Land':
+            if isinstance(left, DFEvalValue) and left.value == 0:
+                return DFEvalValue(0, 1)
+            if isinstance(right, DFEvalValue) and right.value == 0:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFEvalValue) and left.value > 0:
+                return right
+            if isinstance(right, DFEvalValue) and right.value > 0:
+                return left
+            if isinstance(left, DFOperator) and left.operator == 'Unot'\
+                    and left.nextnodes[0] == right:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(0, 1)
+                else:
+                    return node
+            if isinstance(right, DFOperator) and right.operator == 'Unot'\
+                    and right.nextnodes[0] == left:
+                if self.getWidth(node) == 1:
+                    return DFEvalValue(0, 1)
+                else:
+                    return node
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and left.nextnodes[0] == right:
+                return DFEvalValue(0, 1)
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and right.nextnodes[0] == left:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[0] == right.nextnodes[0]\
+                    and isinstance(left.nextnodes[1], DFEvalValue)\
+                    and isinstance(right.nextnodes[1], DFEvalValue)\
+                    and left.nextnodes[1].value != right.nextnodes[1].value:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[1] == right.nextnodes[1]\
+                    and isinstance(left.nextnodes[0], DFEvalValue)\
+                    and isinstance(right.nextnodes[0], DFEvalValue)\
+                    and left.nextnodes[0].value != right.nextnodes[0].value:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[0] == right.nextnodes[1]\
+                    and isinstance(left.nextnodes[1], DFEvalValue)\
+                    and isinstance(right.nextnodes[0], DFEvalValue)\
+                    and left.nextnodes[1].value != right.nextnodes[0].value:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[1] == right.nextnodes[0]\
+                    and isinstance(left.nextnodes[0], DFEvalValue)\
+                    and isinstance(right.nextnodes[1], DFEvalValue)\
+                    and left.nextnodes[0].value != right.nextnodes[1].value:
+                return DFEvalValue(0, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and isinstance(left.nextnodes[0], DFOperator) and left.nextnodes[0].operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[0].nextnodes[0] == right.nextnodes[0]\
+                    and isinstance(left.nextnodes[0].nextnodes[1], DFEvalValue)\
+                    and isinstance(right.nextnodes[1], DFEvalValue)\
+                    and left.nextnodes[0].nextnodes[1].value != right.nextnodes[1].value:
+                return right
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and isinstance(left.nextnodes[0], DFOperator) and left.nextnodes[0].operator == 'Eq'\
+                    and isinstance(right, DFOperator) and right.operator == 'Eq'\
+                    and left.nextnodes[0].nextnodes[1] == right.nextnodes[0]\
+                    and isinstance(left.nextnodes[0].nextnodes[0], DFEvalValue)\
+                    and isinstance(right.nextnodes[1], DFEvalValue)\
+                    and left.nextnodes[0].nextnodes[0].value != right.nextnodes[1].value:
+                return right
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and isinstance(right.nextnodes[0], DFOperator) and right.nextnodes[0].operator == 'Eq'\
+                    and isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and right.nextnodes[0].nextnodes[0] == left.nextnodes[0]\
+                    and isinstance(right.nextnodes[0].nextnodes[1], DFEvalValue)\
+                    and isinstance(left.nextnodes[1], DFEvalValue)\
+                    and right.nextnodes[0].nextnodes[1].value != left.nextnodes[1].value:
+                return left
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and isinstance(right.nextnodes[0], DFOperator) and right.nextnodes[0].operator == 'Eq'\
+                    and isinstance(left, DFOperator) and left.operator == 'Eq'\
+                    and right.nextnodes[0].nextnodes[1] == left.nextnodes[0]\
+                    and isinstance(right.nextnodes[0].nextnodes[0], DFEvalValue)\
+                    and isinstance(left.nextnodes[1], DFEvalValue)\
+                    and right.nextnodes[0].nextnodes[0].value != left.nextnodes[1].value:
+                return left
+            return node
+        if node.operator == 'Lor':
+            if isinstance(left, DFEvalValue) and left.value == 0:
+                return right
+            if isinstance(right, DFEvalValue) and right.value == 0:
+                return left
+            if isinstance(left, DFEvalValue) and left.value > 0:
+                return DFEvalValue(1, 1)
+            if isinstance(right, DFEvalValue) and right.value > 0:
+                return DFEvalValue(1, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Unot'\
+                    and left.nextnodes[0] == right:
+                return DFEvalValue(1, 1)
+            if isinstance(right, DFOperator) and right.operator == 'Unot'\
+                    and right.nextnodes[0] == left:
+                return DFEvalValue(1, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Ulnot'\
+                    and left.nextnodes[0] == right:
+                return DFEvalValue(1, 1)
+            if isinstance(right, DFOperator) and right.operator == 'Ulnot'\
+                    and right.nextnodes[0] == left:
+                return DFEvalValue(1, 1)
+            if isinstance(left, DFOperator) and left.operator == 'Land'\
+                    and isinstance(right, DFOperator) and right.operator == 'Land'\
+                    and isinstance(left.nextnodes[0], DFOperator) and left.nextnodes[0].operator == 'Ulnot'\
+                    and left.nextnodes[0].nextnodes[0] == right.nextnodes[0]\
+                    and left.nextnodes[1] == right.nextnodes[1]:
+                return left.nextnodes[1]
+            if isinstance(left, DFOperator) and left.operator == 'Land'\
+                    and isinstance(right, DFOperator) and right.operator == 'Land'\
+                    and isinstance(left.nextnodes[1], DFOperator) and left.nextnodes[1].operator == 'Ulnot'\
+                    and left.nextnodes[1].nextnodes[0] == right.nextnodes[0]\
+                    and left.nextnodes[0] == right.nextnodes[1]:
+                return left.nextnodes[0]
+            if isinstance(right, DFOperator) and right.operator == 'Land'\
+                    and isinstance(left, DFOperator) and left.operator == 'Land'\
+                    and isinstance(right.nextnodes[0], DFOperator) and right.nextnodes[0].operator == 'Ulnot'\
+                    and right.nextnodes[0].nextnodes[0] == left.nextnodes[0]\
+                    and right.nextnodes[1] == left.nextnodes[1]:
+                return right.nextnodes[1]
+            if isinstance(right, DFOperator) and right.operator == 'Land'\
+                    and isinstance(left, DFOperator) and left.operator == 'Land'\
+                    and isinstance(right.nextnodes[1], DFOperator) and right.nextnodes[1].operator == 'Ulnot'\
+                    and right.nextnodes[1].nextnodes[0] == left.nextnodes[0]\
+                    and right.nextnodes[0] == left.nextnodes[1]:
+                return right.nextnodes[0]
+            return node
+        return node
+
+    def mergeLandLor(self, node):
+        return self.mergeLor(node)
+
+    def mergeLand(self, node):
+        ret = self._mergeLand(node)
+        if isinstance(ret, tuple):
+            retnode = None
+            for r in ret:
+                if retnode is None:
+                    retnode = r
+                else:
+                    retnode = DFOperator((retnode, r), 'Land')
+            return retnode
+        return ret
+
+    def _mergeLand(self, node):
+        if not isinstance(node, DFOperator):
+            return node
+        if node.operator != 'Land':
+            return node
+        left = self._mergeLand(node.nextnodes[0])
+        right = self._mergeLand(node.nextnodes[1])
+        landlist = []
+        if isinstance(left, tuple):
+            landlist.extend(left)
+        else:
+            landlist.append(left)
+        if isinstance(right, tuple):
+            landlist.extend(right)
+        else:
+            landlist.append(right)
+        ret_list = []
+        ret_exist_list = []
+        for l in landlist:
+            s = l
+            not_s = l.nextnodes[0] if isinstance(
+                l, DFOperator) and l.operator == 'Ulnot' else DFOperator((l,), 'Ulnot')
+            if not_s in ret_exist_list:
+                return (DFEvalValue(0, 1),)
+            if not (s in ret_exist_list):
+                ret_list.append(l)
+                ret_exist_list.append(s)
+        return tuple(sorted(ret_list, key=lambda x: x.tocode(), reverse=True))
+
+    def mergeLor(self, node):
+        ret = self._mergeLor(node)
+        if isinstance(ret, tuple):
+            retnode = None
+            for r in ret:
+                if retnode is None:
+                    retnode = r
+                else:
+                    retnode = DFOperator((retnode, r), 'Lor')
+            return retnode
+        return ret
+
+    def _mergeLor(self, node):
+        if not isinstance(node, DFOperator):
+            return node
+        if node.operator == 'Land':
+            return self.mergeLand(node)
+        if node.operator != 'Lor':
+            return node
+        left = self._mergeLor(node.nextnodes[0])
+        right = self._mergeLor(node.nextnodes[1])
+        landlist = []
+        if isinstance(left, tuple):
+            landlist.extend(left)
+        else:
+            landlist.append(left)
+        if isinstance(right, tuple):
+            landlist.extend(right)
+        else:
+            landlist.append(right)
+        ret_list = []
+        ret_exist_list = []
+        for l in landlist:
+            s = l
+            not_s = l.nextnodes[0] if isinstance(
+                l, DFOperator) and l.operator == 'Ulnot' else DFOperator((l,), 'Ulnot')
+            if not_s in ret_exist_list:
+                return (DFEvalValue(1, 1),)
+            if not (s in ret_exist_list):
+                ret_list.append(l)
+                ret_exist_list.append(s)
+        return tuple(sorted(ret_list, key=lambda x: x.tocode(), reverse=True))
+
+# -------------------------------------------------------------------------------
+
+
+class VerilogDataflowOptimizer(VerilogOptimizer):
+    def __init__(self, terms, binddict):
+        VerilogOptimizer.__init__(self, terms, {})
+        self.binddict = binddict
+        self.resolved_terms = {}
+        self.resolved_binddict = {}
+
+    def getResolvedTerms(self):
+        return self.resolved_terms
+
+    def getResolvedBinddict(self):
+        return self.resolved_binddict
+
+    def getConstlist(self):
+        return self.constlist
+
+    def getTerm(self, name):
+        return self.terms[name]
+
+    def resolveConstant(self):
+        # 2-pass
+        for bk, bv in sorted(self.binddict.items(), key=lambda x: len(x[0])):
+            termtype = self.getTerm(bk).termtype
+            if signaltype.isParameter(termtype) or signaltype.isLocalparam(termtype):
+                rslt = self.optimizeConstant(bv[0].tree)
+                if isinstance(rslt, DFEvalValue):
+                    self.constlist[bk] = rslt
+
+        for bk, bv in sorted(self.binddict.items(), key=lambda x: len(x[0])):
+            termtype = self.getTerm(bk).termtype
+            if signaltype.isParameter(termtype) or signaltype.isLocalparam(termtype):
+                rslt = self.optimizeConstant(bv[0].tree)
+                if isinstance(rslt, DFEvalValue):
+                    self.constlist[bk] = rslt
+
+        self.resolved_binddict = copy.deepcopy(self.binddict)
+        for bk, bv in sorted(self.binddict.items(), key=lambda x: len(x[0])):
+            new_bindlist = []
+            for bind in bv:
+                new_bind = copy.deepcopy(bind)
+                if bk in self.constlist:
+                    new_bind.tree = self.constlist[bk]
+                new_bindlist.append(new_bind)
+            self.resolved_binddict[bk] = new_bindlist
+
+        self.resolved_terms = copy.deepcopy(self.terms)
+        for tk, tv in sorted(self.resolved_terms.items(), key=lambda x: len(x[0])):
+            if tv.msb is not None:
+                rslt = self.optimizeConstant(tv.msb)
+                self.resolved_terms[tk].msb = rslt
+            if tv.lsb is not None:
+                rslt = self.optimizeConstant(tv.lsb)
+                self.resolved_terms[tk].lsb = rslt
+            if tv.dims is not None:
+                dims = []
+                for l, r in tv.dims:
+                    l = self.optimizeConstant(l)
+                    r = self.optimizeConstant(r)
+                    dims.append((l, r))
+                self.resolved_terms[tk].dims = tuple(dims)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/reorder.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/reorder.py
new file mode 100644
index 0000000..f948af2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/reorder.py
@@ -0,0 +1,143 @@
+# -------------------------------------------------------------------------------
+# reorder.py
+#
+# Reorders DFNode trees in order of DFBranch, DFOperator, and DFTerminal
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import copy
+
+from pyverilog.dataflow.dataflow import *
+
+
+def reorder(tree):
+    if tree is None:
+        return None
+    if isinstance(tree, DFConstant):
+        return tree
+    if isinstance(tree, DFTerminal):
+        return tree
+    if isinstance(tree, DFEvalValue):
+        return tree
+    if isinstance(tree, DFUndefined):
+        return tree
+    if isinstance(tree, DFHighImpedance):
+        return tree
+
+    if isinstance(tree, DFBranch):
+        truenode = reorder(tree.truenode)
+        falsenode = reorder(tree.falsenode)
+        condnode = reorder(tree.condnode)
+        if isinstance(condnode, DFBranch):
+            return insertBranch(condnode, truenode, falsenode)
+        return DFBranch(condnode, truenode, falsenode)
+
+    if isinstance(tree, DFOperator):
+        resolvednodes = []
+        for n in tree.nextnodes:
+            resolvednodes.append(reorder(n))
+        for r in resolvednodes:
+            if isinstance(r, DFBranch):
+                return insertOpList(resolvednodes, tree.operator)
+        return DFOperator(tuple(resolvednodes), tree.operator)
+
+    if isinstance(tree, DFConcat):
+        resolvednodes = []
+        for n in tree.nextnodes:
+            resolvednodes.append(reorder(n))
+        for r in resolvednodes:
+            if isinstance(r, DFBranch):
+                return insertConcat(resolvednodes)
+        return DFConcat(tuple(resolvednodes))
+
+    if isinstance(tree, DFPartselect):
+        resolved_msb = reorder(tree.msb)
+        resolved_lsb = reorder(tree.lsb)
+        resolved_var = reorder(tree.var)
+        if isinstance(resolved_msb, DFBranch) or isinstance(resolved_lsb, DFBranch):
+            raise FormatError('MSB and LSB should not be DFBranch')
+        if isinstance(resolved_var, DFBranch):
+            return insertPartselect(resolved_var, resolved_msb, resolved_lsb)
+        return DFPartselect(resolved_var, resolved_msb, resolved_lsb)
+
+    if isinstance(tree, DFPointer):
+        resolved_ptr = reorder(tree.ptr)
+        resolved_var = reorder(tree.var)
+        if isinstance(resolved_ptr, DFBranch):
+            # raise FormatError('PTR should not be DFBranch')n
+            return DFBranch(resolved_ptr.condnode,
+                            reorder(DFPointer(resolved_var, resolved_ptr.truenode)),
+                            reorder(DFPointer(resolved_var, resolved_ptr.falsenode)))
+        if isinstance(resolved_var, DFBranch):
+            return insertPointer(resolved_var, resolved_ptr)
+        return DFPointer(resolved_var, resolved_ptr)
+
+    if isinstance(tree, DFDelay):
+        return DFDelay(reorder(tree.nextnode))
+
+    raise DefinitionError('Undefined DFNode type: %s %s' % (str(type(tree)), str(tree)))
+
+############################################################################
+
+
+def insertBranch(base, truenode, falsenode):
+    if isinstance(base, DFBranch):
+        return DFBranch(base.condnode, insertBranch(base.truenode, truenode, falsenode), insertBranch(base.falsenode, truenode, falsenode))
+    return DFBranch(base, truenode, falsenode)
+
+
+def insertUnaryOp(base, op):
+    if isinstance(base, DFBranch):
+        return DFBranch(base.condnode, insertUnaryOp(base.truenode, op), insertUnaryOp(base.falsenode, op))
+    return DFOperator((base,), op)
+
+
+def insertOp(left, right, op):
+    if isinstance(left, DFBranch):
+        return DFBranch(left.condnode, insertOp(left.truenode, right, op), insertOp(left.falsenode, right, op))
+    elif isinstance(right, DFBranch):
+        return DFBranch(right.condnode, insertOp(left, right.truenode, op), insertOp(left, right.falsenode, op))
+    return DFOperator((left, right), op)
+
+
+def insertOpList(nextnodes, op):
+    donenodes = []
+    restnodes = list(nextnodes)
+    for n in nextnodes:
+        restnodes.pop(0)
+        if isinstance(n, DFBranch):
+            return DFBranch(n.condnode, insertOpList(tuple(donenodes + [n.truenode, ] + restnodes), op), insertOpList(tuple(donenodes + [n.falsenode, ] + restnodes), op))
+        donenodes.append(n)
+    return DFOperator(nextnodes, op)
+
+
+def insertConcat(nextnodes):
+    donenodes = []
+    restnodes = list(nextnodes)
+    for n in nextnodes:
+        restnodes.pop(0)
+        if isinstance(n, DFBranch):
+            return DFBranch(n.condnode, insertConcat(tuple(donenodes + [n.truenode, ] + restnodes)), insertConcat(tuple(donenodes + [n.falsenode, ] + restnodes)))
+        donenodes.append(n)
+    return DFConcat(nextnodes)
+
+
+def insertPartselect(var, msb, lsb):
+    if isinstance(var, DFBranch):
+        return DFBranch(var.condnode, insertPartselect(var.truenode, msb, lsb), insertPartselect(var.falsenode, msb, lsb))
+    if var is None:
+        return None
+    return DFPartselect(var, msb, lsb)
+
+
+def insertPointer(var, ptr):
+    if isinstance(var, DFBranch):
+        return DFBranch(var.condnode, insertPointer(var.truenode, ptr), insertPointer(var.falsenode, ptr))
+    if var is None:
+        return None
+    return DFPointer(var, ptr)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/replace.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/replace.py
new file mode 100644
index 0000000..de4ac8b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/replace.py
@@ -0,0 +1,53 @@
+# -------------------------------------------------------------------------------
+# replace.py
+#
+# Replacing DFUndefined and None with DFTerminal
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.dataflow.dataflow import *
+
+
+def replaceUndefined(tree, termname):
+    if tree is None:
+        return DFTerminal(termname)
+    if isinstance(tree, DFUndefined):
+        return DFTerminal(termname)
+    # if isinstance(tree, DFHighImpedance): return DFTerminal(termname)
+    if isinstance(tree, DFConstant):
+        return tree
+    if isinstance(tree, DFEvalValue):
+        return tree
+    if isinstance(tree, DFTerminal):
+        return tree
+    if isinstance(tree, DFBranch):
+        condnode = replaceUndefined(tree.condnode, termname)
+        truenode = replaceUndefined(tree.truenode, termname)
+        falsenode = replaceUndefined(tree.falsenode, termname)
+        return DFBranch(condnode, truenode, falsenode)
+    if isinstance(tree, DFOperator):
+        nextnodes = []
+        for n in tree.nextnodes:
+            nextnodes.append(replaceUndefined(n, termname))
+        return DFOperator(tuple(nextnodes), tree.operator)
+    if isinstance(tree, DFPartselect):
+        msb = replaceUndefined(tree.msb, termname)
+        lsb = replaceUndefined(tree.lsb, termname)
+        var = replaceUndefined(tree.var, termname)
+        return DFPartselect(var, msb, lsb)
+    if isinstance(tree, DFPointer):
+        ptr = replaceUndefined(tree.ptr, termname)
+        var = replaceUndefined(tree.var, termname)
+        return DFPointer(var, ptr)
+    if isinstance(tree, DFConcat):
+        nextnodes = []
+        for n in tree.nextnodes:
+            nextnodes.append(replaceUndefined(n, termname))
+        return DFConcat(tuple(nextnodes))
+    raise DefinitionError('Undefined DFNode type: %s %s' % (str(type(tree)), str(tree)))
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/signalvisitor.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/signalvisitor.py
new file mode 100644
index 0000000..e2d5251
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/signalvisitor.py
@@ -0,0 +1,559 @@
+# -------------------------------------------------------------------------------
+# signalvisitor.py
+#
+# Signal definition visitor
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.vparser.ast import *
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+from pyverilog.utils.scope import ScopeLabel, ScopeChain
+from pyverilog.dataflow.dataflow import *
+from pyverilog.dataflow.visit import *
+from pyverilog.dataflow.optimizer import VerilogOptimizer
+import pyverilog.dataflow.reorder as reorder
+
+
+class SignalVisitor(NodeVisitor):
+    def __init__(self, moduleinfotable, top):
+        self.moduleinfotable = moduleinfotable
+        self.top = top
+        self.frames = FrameTable()
+        self.labels = Labels()
+        self.optimizer = VerilogOptimizer({}, {})
+
+        # set the top frame of top module
+        self.stackInstanceFrame(top, top)
+
+    def getFrameTable(self):
+        return self.frames
+
+    def start_visit(self):
+        return self.visit(self.moduleinfotable.getDefinition(self.top))
+
+    def visit_Input(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Output(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Inout(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Reg(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Wire(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Supply(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Tri(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Integer(self, node):
+        self.frames.addSignal(node)
+
+    def visit_Parameter(self, node):
+        self.frames.addConst(node)
+        name = self.frames.getCurrent() + ScopeLabel(node.name, 'signal')
+        if not self.hasConstant(name):
+            value = self.optimize(self.getTree(node.value, self.frames.getCurrent()))
+            self.setConstant(name, value)
+
+    def visit_Localparam(self, node):
+        self.frames.addConst(node)
+        name = self.frames.getCurrent() + ScopeLabel(node.name, 'signal')
+        if not self.hasConstant(name):
+            value = self.optimize(self.getTree(node.value, self.frames.getCurrent()))
+            self.setConstant(name, value)
+
+    def visit_Genvar(self, node):
+        self.frames.addConst(node)
+        name = self.frames.getCurrent() + ScopeLabel(node.name, 'signal')
+        if not self.hasConstant(name):
+            value = DFEvalValue(0)
+            self.setConstant(name, value)
+
+    def visit_Function(self, node):
+        self.frames.addFunction(node)
+        self.frames.setFunctionDef()
+        self.generic_visit(node)
+        self.frames.unsetFunctionDef()
+
+    def visit_Task(self, node):
+        self.frames.addTask(node)
+        self.frames.setTaskDef()
+        self.generic_visit(node)
+        self.frames.unsetTaskDef()
+
+    def visit_Initial(self, node):
+        pass
+        #label = self.labels.get( self.frames.getLabelKey('initial') )
+        # current = self.frames.addFrame(ScopeLabel(label, 'initial'),
+        #                               generate=self.frames.isGenerate(),
+        #                               initial=True)
+        # self.generic_visit(node)
+        # self.frames.setCurrent(current)
+
+    def visit_InstanceList(self, node):
+        for i in node.instances:
+            self.visit(i)
+
+    def visit_Instance(self, node):
+        if node.array:
+            return self._visit_Instance_array(node)
+        nodename = node.name
+        return self._visit_Instance_body(node, nodename)
+
+    def _visit_Instance_array(self, node):
+        if node.name == '':
+            raise verror.FormatError("Module %s requires an instance name" % node.module)
+
+        current = self.frames.getCurrent()
+        msb = self.optimize(self.getTree(node.array.msb, current)).value
+        lsb = self.optimize(self.getTree(node.array.lsb, current)).value
+
+        for i in range(lsb, msb + 1):
+            nodename = node.name + '_' + str(i)
+            self._visit_Instance_body(node, nodename)
+
+    def _visit_Instance_body(self, node, nodename):
+        if node.module in primitives:
+            return self._visit_Instance_primitive(node)
+
+        if nodename == '':
+            raise verror.FormatError("Module %s requires an instance name" % node.module)
+
+        current = self.stackInstanceFrame(nodename, node.module)
+
+        self.setInstanceSimpleConstantTerms()
+
+        scope = self.frames.getCurrent()
+
+        paramnames = self.moduleinfotable.getParamNames(node.module)
+        for paramnames_i, param in enumerate(node.parameterlist):
+            paramname = paramnames[paramnames_i] if param.paramname is None else param.paramname
+            if paramname not in paramnames:
+                raise verror.FormatError("No such parameter: %s in %s" %
+                                         (paramname, nodename))
+            value = self.optimize(self.getTree(param.argname, current))
+            name, definition = self.searchConstantDefinition(scope, paramname)
+            self.setConstant(name, value)
+
+        self.setInstanceConstants()
+        self.setInstanceConstantTerms()
+
+        self.visit(self.moduleinfotable.getDefinition(node.module))
+        self.frames.setCurrent(current)
+
+    def _visit_Instance_primitive(self, node):
+        pass
+
+    def visit_Always(self, node):
+        label = self.labels.get(self.frames.getLabelKey('always'))
+        current = self.frames.addFrame(ScopeLabel(label, 'always'),
+                                       generate=self.frames.isGenerate(),
+                                       always=True)
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+
+    def visit_IfStatement(self, node):
+
+        if (self.frames.isGenerate()
+            and not self.frames.isAlways() and not self.frames.isInitial()
+            and not self.frames.isFunctioncall() and not self.frames.isTaskcall()
+                and not self.frames.isFunctiondef() and not self.frames.isTaskdef()):
+            # generate-if statement
+            current = self.frames.getCurrent()
+            tree = self.getTree(node.cond, current)
+            rslt = self.optimize(tree)
+            if not isinstance(rslt, DFEvalValue):
+                raise verror.FormatError("Can not resolve generate-if condition")
+            if rslt.value > 0:
+                label = self._if_true(node)
+            else:
+                label = self.labels.get(self.frames.getLabelKey('if'))
+                self._if_false(node, label)
+            return
+
+        label = self._if_true(node)
+        self._if_false(node, label)
+
+    def _toELSE(self, label):
+        return label + '_ELSE'
+
+    def _if_true(self, node):
+        if node.true_statement is None:
+            return None
+        label = self.labels.get(self.frames.getLabelKey('if'))
+        current = self.frames.addFrame(ScopeLabel(label, 'if'),
+                                       frametype='ifthen',
+                                       condition=node.cond,
+                                       functioncall=self.frames.isFunctioncall(),
+                                       taskcall=self.frames.isTaskcall(),
+                                       generate=self.frames.isGenerate(),
+                                       always=self.frames.isAlways(),
+                                       initial=self.frames.isInitial())
+        self.visit(node.true_statement)
+        self.frames.setCurrent(current)
+        return label
+
+    def _if_false(self, node, label):
+        if node.false_statement is None:
+            return
+        label = self._toELSE(label)
+        current = self.frames.addFrame(ScopeLabel(label, 'if'),
+                                       frametype='ifelse',
+                                       condition=node.cond,
+                                       functioncall=self.frames.isFunctioncall(),
+                                       taskcall=self.frames.isTaskcall(),
+                                       generate=self.frames.isGenerate(),
+                                       always=self.frames.isAlways(),
+                                       initial=self.frames.isInitial())
+        self.visit(node.false_statement)
+        self.frames.setCurrent(current)
+        return label
+
+    def visit_CaseStatement(self, node):
+        start_frame = self.frames.getCurrent()
+        self._case(node.comp, node.caselist)
+        self.frames.setCurrent(start_frame)
+
+    def visit_CasexStatement(self, node):
+        return self.visit_CaseStatement(node)
+
+    def _case(self, comp, caselist):
+        if len(caselist) == 0:
+            return
+        case = caselist[0]
+        cond = IntConst('1')
+        if case.cond is not None:
+            if len(case.cond) > 1:
+                cond = Eq(comp, case.cond[0])
+                for c in case.cond[1:]:
+                    cond = Lor(cond, Eq(comp, c))
+            else:
+                cond = Eq(comp, case.cond[0])
+        label = self.labels.get(self.frames.getLabelKey('if'))
+        current = self.frames.addFrame(ScopeLabel(label, 'if'),
+                                       frametype='ifthen',
+                                       condition=cond,
+                                       functioncall=self.frames.isFunctioncall(),
+                                       taskcall=self.frames.isTaskcall(),
+                                       generate=self.frames.isGenerate(),
+                                       always=self.frames.isAlways(),
+                                       initial=self.frames.isInitial())
+        if case.statement is not None:
+            self.visit(case.statement)
+        self.frames.setCurrent(current)
+        if len(caselist) == 1:
+            return
+        label = self._toELSE(label)
+        current = self.frames.addFrame(ScopeLabel(label, 'if'),
+                                       frametype='ifelse',
+                                       condition=cond,
+                                       functioncall=self.frames.isFunctioncall(),
+                                       taskcall=self.frames.isTaskcall(),
+                                       generate=self.frames.isGenerate(),
+                                       always=self.frames.isAlways(),
+                                       initial=self.frames.isInitial())
+        self._case(comp, caselist[1:])
+
+    def visit_ForStatement(self, node):
+        # pre-statement
+        current = self.frames.getCurrent()
+        pre_right = self.getTree(node.pre.right, current)
+        pre_right_value = self.optimize(pre_right)
+        loop = pre_right_value.value
+        self.frames.setForPre()
+        self.visit(node.pre)
+        self.frames.unsetForPre()
+        label = self.labels.get(self.frames.getLabelKey('for'))
+        #loop = 0
+        while True:
+            # cond-statement
+            current = self.frames.getCurrent()
+            tree = self.getTree(node.cond, current)
+            rslt = self.optimize(tree)
+            if not isinstance(rslt, DFEvalValue):
+                raise verror.FormatError(("Can not process the for-statement. "
+                                          "for-condition should be evaluated statically."))
+            # loop termination
+            if rslt.value <= 0:
+                break
+
+            # main-statement
+            current = self.frames.addFrame(ScopeLabel(label, 'for', loop),
+                                           frametype='for',
+                                           functioncall=self.frames.isFunctioncall(),
+                                           taskcall=self.frames.isTaskcall(),
+                                           generate=self.frames.isGenerate(),
+                                           always=self.frames.isAlways(),
+                                           initial=self.frames.isInitial(),
+                                           loop=loop, loop_iter=self.frames.getForIter())
+            self.visit(node.statement)
+            self.frames.setCurrent(current)
+
+            # post-statement
+            current = self.frames.getCurrent()
+            post_right = self.getTree(node.post.right, current)
+            post_right_value = self.optimize(post_right)
+            loop = post_right_value.value
+            self.frames.setForPost()
+            self.visit(node.post)
+            self.frames.unsetForPost()
+            #loop += 1
+
+    def visit_WhileStatement(self, node):
+        pass
+
+    def visit_GenerateStatement(self, node):
+        label = self.labels.get(self.frames.getLabelKey('generate'))
+        current = self.frames.addFrame(ScopeLabel(label, 'generate'),
+                                       generate=True)
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+
+    def visit_Block(self, node):
+        label = None
+        if node.scope is not None:
+            label = node.scope
+        else:
+            label = self.labels.get(self.frames.getLabelKey('block'))
+        current = self.frames.addFrame(ScopeLabel(label, 'block'),
+                                       frametype='block',
+                                       functioncall=self.frames.isFunctioncall(),
+                                       taskcall=self.frames.isTaskcall(),
+                                       generate=self.frames.isGenerate(),
+                                       always=self.frames.isAlways(),
+                                       initial=self.frames.isInitial())
+        self.generic_visit(node)
+        self.frames.setCurrent(current)
+
+    def visit_Assign(self, node):
+        pass
+
+    def visit_BlockingSubstitution(self, node):
+        if self.frames.isForpre() or self.frames.isForpost():
+            current = self.frames.getCurrent()
+            name, definition = self.searchConstantDefinition(current,
+                                                             node.left.var.name)
+            value = self.optimize(self.getTree(node.right.var, current))
+            self.setConstant(name, value)
+            self.frames.setForIter(name)
+
+    def visit_NonblockingSubstitution(self, node):
+        pass
+
+    def optimize(self, node):
+        return self.optimizer.optimize(node)
+
+    def stackInstanceFrame(self, instname, modulename):
+        current = self.frames.addFrame(ScopeLabel(instname, 'module'), module=True,
+                                       modulename=modulename)
+        self.frames.updateSignal(self.moduleinfotable.getSignals(modulename))
+        self.frames.updateConst(self.moduleinfotable.getConsts(modulename))
+        return current
+
+    def setInstanceSimpleConstantTerms(self):
+        current = self.frames.getCurrent()
+        for name, definitions in self.frames.getConsts(current).items():
+            if len(definitions) > 1:
+                raise verror.FormatError("Multiple definitions for Constant")
+            for definition in definitions:
+                simple_definition = copy.deepcopy(definition)
+                if simple_definition.width is not None:
+                    simple_definition.width.msb = None
+                    simple_definition.width.lsb = None
+                term = self.makeConstantTerm(name, simple_definition, current)
+                self.setConstantTerm(name, term)
+
+    def setInstanceConstantTerms(self):
+        current = self.frames.getCurrent()
+        for name, definitions in self.frames.getConsts(current).items():
+            if len(definitions) > 1:
+                raise verror.FormatError("Multiple definitions for Constant")
+            for definition in definitions:
+                term = self.makeConstantTerm(name, definition, current)
+                self.setConstantTerm(name, term)
+
+    def setInstanceConstants(self):
+        current = self.frames.getCurrent()
+
+        all_passed = False
+        while not all_passed:
+            all_passed = True
+            for name, definitions in self.frames.getConsts(current).items():
+                if len(definitions) > 1:
+                    raise verror.FormatError("Multiple definitions for Constant")
+
+                if self.hasConstant(name):
+                    continue
+
+                for definition in definitions:
+                    if isinstance(definition, Genvar):
+                        continue
+                    value = self.optimize(self.getTree(definition.value, current))
+                    if not isinstance(value, DFEvalValue):
+                        all_passed = False
+                        continue
+
+                    self.setConstant(name, value)
+
+    def setConstant(self, name, value):
+        self.optimizer.setConstant(name, value)
+
+    def getConstant(self, name):
+        return self.optimizer.getConstant(name)
+
+    def hasConstant(self, name):
+        return self.optimizer.hasConstant(name)
+
+    def setConstantTerm(self, name, term):
+        self.optimizer.setTerm(name, term)
+
+    def hasConstantTerm(self, name):
+        self.optimizer.hasTerm(name)
+
+    def toScopeChain(self, blocklabel):
+        scopelist = []
+        for b in blocklabel.labellist:
+            if b.loop is not None:
+                loop = self.optimize(b.loop)
+                if not isinstance(loop, DFEvalValue):
+                    raise verror.FormatError('Loop iterator should be constant')
+                scopelist.append(ScopeLabel(b.name, 'for', loop))
+            scopelist.append(ScopeLabel(b.name, 'any'))
+        return ScopeChain(scopelist)
+
+    def searchScopeConstantValue(self, blocklabel, name):
+        currentmodule = self.frames.getCurrentModuleScopeChain()
+        localchain = currentmodule[-1:] + self.toScopeChain(blocklabel)
+        matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+        varname = currentmodule[:-1] + matchedchain + ScopeLabel(name, 'signal')
+        const = self.getConstant(varname)
+        return const
+
+    # def searchScopeConstantDefinition(self, blocklabel, name):
+    #    currentmodule = self.frames.getCurrentModuleScopeChain()
+    #    localchain = currentmodule[-1:] + self.toScopeChain(blocklabel)
+    #    matchedchain = self.frames.searchMatchedScopeChain(currentmodule, localchain)
+    #    constdef = self.frames.getConstantDefinition(matchedchain, name)
+    #    return constdef
+
+    def searchConstantDefinition(self, key, name):
+        foundkey, founddef = self.frames.searchConstantDefinition(key, name)
+        if foundkey is not None:
+            return foundkey + ScopeLabel(name, 'signal'), founddef
+        foundkey, founddef = self.frames.searchSignalDefinition(key, name)
+        if foundkey is not None:
+            return foundkey + ScopeLabel(name, 'signal'), founddef
+        if foundkey is None:
+            raise verror.DefinitionError('constant value not found: %s' % name)
+
+    def searchConstantValue(self, key, name):
+        foundkey, founddef = self.searchConstantDefinition(key, name)
+        const = self.getConstant(foundkey)
+        return const
+
+    def makeConstantTerm(self, name, node, scope):
+        termtype = node.__class__.__name__
+        termtypes = set([termtype])
+        msb = DFIntConst('31') if node.width is None else self.makeDFTree(node.width.msb, scope)
+        lsb = DFIntConst('0') if node.width is None else self.makeDFTree(node.width.lsb, scope)
+        return Term(name, termtypes, msb, lsb)
+
+    def getTree(self, node, scope):
+        expr = node.var if isinstance(node, Rvalue) else node
+        return self.makeDFTree(expr, scope)
+
+    def makeDFTree(self, node, scope):
+        if isinstance(node, str):
+            return self.searchConstantValue(scope, node)
+
+        if isinstance(node, Identifier):
+            if node.scope is not None:
+                const = self.searchScopeConstantValue(node.scope, node.name)
+                return const
+            return self.searchConstantValue(scope, node.name)
+
+        if isinstance(node, IntConst):
+            return DFIntConst(node.value)
+
+        if isinstance(node, FloatConst):
+            return DFFloatConst(node.value)
+
+        if isinstance(node, StringConst):
+            return DFStringConst(node.value)
+
+        if isinstance(node, Cond):
+            true_df = self.makeDFTree(node.true_value, scope)
+            false_df = self.makeDFTree(node.false_value, scope)
+            cond_df = self.makeDFTree(node.cond, scope)
+            if isinstance(cond_df, DFBranch):
+                return reorder.insertCond(cond_df, true_df, false_df)
+            return DFBranch(cond_df, true_df, false_df)
+
+        if isinstance(node, UnaryOperator):
+            right_df = self.makeDFTree(node.right, scope)
+            if isinstance(right_df, DFBranch):
+                return reorder.insertUnaryOp(right_df, node.__class__.__name__)
+            return DFOperator((right_df,), node.__class__.__name__)
+
+        if isinstance(node, Operator):
+            left_df = self.makeDFTree(node.left, scope)
+            right_df = self.makeDFTree(node.right, scope)
+            if isinstance(left_df, DFBranch) or isinstance(right_df, DFBranch):
+                return reorder.insertOp(left_df, right_df, node.__class__.__name__)
+            return DFOperator((left_df, right_df,), node.__class__.__name__)
+
+        if isinstance(node, Partselect):
+            var_df = self.makeDFTree(node.var, scope)
+            msb_df = self.makeDFTree(node.msb, scope)
+            lsb_df = self.makeDFTree(node.lsb, scope)
+
+            if isinstance(var_df, DFBranch):
+                return reorder.insertPartselect(var_df, msb_df, lsb_df)
+            return DFPartselect(var_df, msb_df, lsb_df)
+
+        if isinstance(node, Pointer):
+            var_df = self.makeDFTree(node.var, scope)
+            ptr_df = self.makeDFTree(node.ptr, scope)
+
+            return DFPointer(var_df, ptr_df)
+
+        if isinstance(node, Concat):
+            nextnodes = []
+            for n in node.list:
+                nextnodes.append(self.makeDFTree(n, scope))
+            for n in nextnodes:
+                if isinstance(n, DFBranch):
+                    return reorder.insertConcat(tuple(nextnodes))
+            return DFConcat(tuple(nextnodes))
+
+        if isinstance(node, Repeat):
+            nextnodes = []
+            times = self.optimize(self.getTree(node.times, scope)).value
+            value = self.makeDFTree(node.value, scope)
+            for i in range(int(times)):
+                nextnodes.append(copy.deepcopy(value))
+            return DFConcat(tuple(nextnodes))
+
+        if isinstance(node, SystemCall):
+            if node.syscall == 'unsigned':
+                return self.makeDFTree(node.args[0])
+            if node.syscall == 'signed':
+                return self.makeDFTree(node.args[0])
+            return DFIntConst('0')
+
+        raise verror.FormatError("unsupported AST node type: %s %s" %
+                                 (str(type(node)), str(node)))
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/subset.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/subset.py
new file mode 100644
index 0000000..47df2d2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/subset.py
@@ -0,0 +1,125 @@
+# -------------------------------------------------------------------------------
+# subset.py
+#
+# Generating Subset of dataflow graph
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import collections
+
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+import pyverilog.utils.signaltype as signaltype
+from pyverilog.dataflow.merge import VerilogDataflowMerge
+
+
+class VerilogSubset(VerilogDataflowMerge):
+    def __init__(self, topmodule, terms, binddict,
+                 resolved_terms, resolved_binddict, constlist):
+        VerilogDataflowMerge.__init__(self, topmodule, terms, binddict,
+                                      resolved_terms, resolved_binddict, constlist)
+        self.clock_name = 'CLK'
+        self.clock_edge = 'posedge'
+        self.reset_name = 'RST_X'
+        self.reset_edge = 'negedge'
+
+    def set_clock_info(self, clock_name, clock_edge):
+        self.clock_name = clock_name
+        self.clock_edge = clock_edge
+
+    def set_reset_info(self, reset_name, reset_edge):
+        self.reset_name = reset_name
+        self.reset_edge = reset_edge
+
+    def getBindSubset(self, termname, visited_sources=set()):
+        term = self.getTerm(termname)
+        if term is None:
+            raise verror.DefinitionError('No such signal')
+        bindlist = self.getBindlist(termname)
+        nextsources = visited_sources.copy()
+        ret_binds = collections.OrderedDict()
+        for bind in bindlist:
+            if not termname in ret_binds:
+                ret_binds[termname] = []
+            ret_binds[termname].append(bind)
+            if bind.isClockEdge():
+                clock_name = bind.getClockName()
+                if clock_name != util.toTermname((self.topmodule, self.clock_name)):
+                    r_binds, r_sources = self.getBindSubset(clock_name, nextsources)
+                    nextsources |= r_sources
+                    ret_binds = util.dictlistmerge(ret_binds, r_binds)
+
+        sources = self.getBindSources(termname)
+        for source in sources:
+            if source in visited_sources:
+                continue
+            nextsources.add(source)
+            r_binds, r_sources = self.getBindSubset(source, nextsources)
+            ret_binds = util.dictlistmerge(ret_binds, r_binds)
+            nextsources |= r_sources
+        return ret_binds, nextsources
+
+    def getBindSourceSubset(self, targets):
+        visited_binddict = collections.OrderedDict()
+        visited_sources = set()
+        for target in targets:
+            termname = util.toTermname(target)
+            r_binds, r_sources = self.getBindSubset(termname, visited_sources)
+            visited_sources |= r_sources
+            visited_binddict = util.dictlistmerge(visited_binddict, r_binds)
+        return visited_binddict, visited_sources
+
+    def getEntire(self):
+        visited_binddict = self.resolved_binddict
+        visited_sources = self.terms.keys()
+        return self._discretion(visited_binddict, visited_sources)
+
+    def getSubset(self, targets):
+        visited_binddict, visited_sources = self.getBindSourceSubset(targets)
+        return self._discretion(visited_binddict, visited_sources)
+
+    def _discretion(self, visited_binddict, visited_sources):
+        terms = collections.OrderedDict()
+        parameter = collections.OrderedDict()
+        assign = collections.OrderedDict()
+        always_clockedge = collections.OrderedDict()
+        always_combination = collections.OrderedDict()
+
+        # discretion the signal desclaration
+        for source in visited_sources:
+            termtype = self.getTermtype(source)
+            if signaltype.isParameter(termtype):
+                continue
+            if signaltype.isLocalparam(termtype):
+                continue
+            terms[source] = self.terms[source]
+
+        for left, rights in visited_binddict.items():
+            for right in rights:
+                assign_type = self.getAssignType(left, right)
+                if assign_type == 'clockedge':
+                    if not left in always_clockedge:
+                        always_clockedge[left] = set([])
+                    always_clockedge[left].add(right)
+                elif assign_type == 'combination':
+                    if not left in always_combination:
+                        always_combination[left] = set([])
+                    always_combination[left].add(right)
+                elif assign_type == 'assign':
+                    if not left in assign:
+                        assign[left] = set([])
+                    assign[left].add(right)
+                elif assign_type == 'parameter':
+                    parameter[left] = right
+                    continue
+                elif assign_type == 'localparam':
+                    parameter[left] = right
+                    continue
+                if not left in terms:
+                    terms[left] = self.terms[left]
+        return terms, parameter, assign, always_clockedge, always_combination
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/visit.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/visit.py
new file mode 100644
index 0000000..da67da3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/visit.py
@@ -0,0 +1,868 @@
+# -------------------------------------------------------------------------------
+# visit.py
+#
+# Basic classes for binding tree analysis
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import re
+import copy
+import collections
+
+import pyverilog
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+from pyverilog.utils.scope import ScopeLabel, ScopeChain
+from pyverilog.vparser.ast import *
+
+
+def map_key(f, d): return collections.OrderedDict([(f(k), v) for k, v in d.items()])
+
+
+def map_value(f, d): return collections.OrderedDict([(k, f(v)) for k, v in d.items()])
+
+
+# Primitive list
+primitives = {
+    'and': Uand,
+    'nand': Unand,
+    'or': Uor,
+    'nor': Unor,
+    'xor': Uxor,
+    'xnor': Uxnor,
+    'not': Unot,
+    'buf': None
+}
+
+
+# Base Visitor
+class NodeVisitor(object):
+    def visit(self, node):
+        method = 'visit_' + node.__class__.__name__
+        visitor = getattr(self, method, self.generic_visit)
+        return visitor(node)
+
+    def generic_visit(self, node):
+        for c in node.children():
+            self.visit(c)
+
+
+# Signal/Object Management Classes
+class AlwaysInfo(object):
+    def __init__(self, clock_name='', clock_edge=None, clock_bit=0,
+                 reset_name='', reset_edge=None, reset_bit=0, senslist=()):
+        self.clock_name = clock_name
+        self.clock_edge = clock_edge
+        self.clock_bit = clock_bit
+        self.reset_name = reset_name
+        self.reset_edge = reset_edge
+        self.reset_bit = reset_bit
+        self.senslist = senslist
+
+    def getClockName(self):
+        return self.clock_name
+
+    def getClockEdge(self):
+        return self.clock_edge
+
+    def getClockBit(self):
+        return self.clock_bit
+
+    def getResetName(self):
+        return self.reset_name
+
+    def getResetEdge(self):
+        return self.reset_edge
+
+    def getResetBit(self):
+        return self.reset_bit
+
+    def isClockEdge(self):
+        if self.clock_name != '' and self.clock_edge == 'posedge':
+            return True
+        if self.clock_name != '' and self.clock_edge == 'negedge':
+            return True
+        return False
+
+    def isCombination(self):
+        if self.clock_name is None:
+            return True
+        return False
+
+    def isResetEdge(self):
+        if self.reset_name != '' and self.reset_edge == 'posedge':
+            return True
+        if self.reset_name != '' and self.reset_edge == 'negedge':
+            return True
+        return False
+
+
+class Label(object):
+    def __init__(self, name):
+        self.name = name
+        self.cnt = 0
+
+    def get(self):
+        ret = self.name + str(self.cnt)
+        self.inc()
+        return ret
+
+    def inc(self):
+        self.cnt += 1
+
+
+class Labels(object):
+    def __init__(self):
+        self.labels = {}
+
+    def get(self, name):
+        if not name in self.labels:
+            self.labels[name] = Label(name)
+        return self.labels[name].get()
+
+    def inc(self, name):
+        if not name in self.labels:
+            self.labels[name] = Label(name)
+        self.labels[name].inc()
+
+
+class VariableTable(object):
+    def __init__(self):
+        self.dict = collections.OrderedDict()
+
+    def add(self, name, var):
+        if name in self.dict:
+            self.dict[name] = self.dict[name] + (var, )
+        else:
+            self.dict[name] = (var, )
+
+    def get(self, name):
+        return self.dict[name]
+
+    def has(self, name):
+        return name in self.dict
+
+    def update(self, table):
+        self.dict.update(table)
+
+    def getDict(self):
+        return self.dict
+
+
+class SignalTable(VariableTable):
+    pass
+
+
+class ConstTable(VariableTable):
+    pass
+
+
+class GenvarTable(VariableTable):
+    pass
+
+
+class Variables(object):
+    def __init__(self):
+        self.signal = SignalTable()
+        self.const = ConstTable()
+        self.genvar = GenvarTable()
+
+    def addSignal(self, name, var):
+        if self.const.has(name):
+            return
+        self.signal.add(name, var)
+
+    def addConst(self, name, var):
+        if self.const.has(name):
+            return
+        self.const.add(name, var)
+
+    def addGenvar(self, name, var):
+        if self.const.has(name):
+            return
+        self.genvar.add(name, var)
+
+    def getSignal(self, name):
+        return self.signal.get(name)
+
+    def getConst(self, name):
+        return self.const.get(name)
+
+    def getGenvar(self, name):
+        return self.genvar.get(name)
+
+    def hasSignal(self, name):
+        return self.signal.has(name)
+
+    def hasConst(self, name):
+        return self.const.has(name)
+
+    def updateSignal(self, var):
+        self.signal.update(var)
+
+    def updateConst(self, var):
+        self.const.update(var)
+
+    def getSignals(self):
+        return self.signal.getDict()
+
+    def getConsts(self):
+        return self.const.getDict()
+
+
+class DefinitionInfo(object):
+    def __init__(self, name, definition):
+        self.name = name
+        self.definition = definition
+        self.variables = Variables()
+        self.ioports = []
+        self.params = []
+
+    def addSignal(self, name, var):
+        self.variables.addSignal(name, var)
+
+    def addConst(self, name, var):
+        self.variables.addConst(name, var)
+
+    def addParamName(self, name):
+        self.params.append(name)
+
+    def addPort(self, port):
+        self.ioports.append(port)
+
+    def addPorts(self, ports):
+        for p in ports:
+            if isinstance(p, Ioport):
+                self.ioports.append(p.first.name)
+            else:
+                self.ioports.append(p.name)
+
+    def getSignals(self):
+        return self.variables.getSignals()
+
+    def getConsts(self):
+        return self.variables.getConsts()
+
+    def getDefinition(self):
+        return self.definition
+
+    def getIOPorts(self):
+        return tuple(self.ioports)
+
+    def getParamNames(self):
+        return tuple(self.params)
+
+
+class DefinitionInfoTable(object):
+    def __init__(self):
+        self.dict = collections.OrderedDict()
+        self.current = None
+
+    def addDefinition(self, name, definition):
+        if name in self.dict:
+            raise verror.DefinitionError('Already defined: %s' % name)
+        self.dict[name] = DefinitionInfo(name, definition)
+        self.current = name
+
+    def addPorts(self, ports):
+        self.dict[self.current].addPorts(ports)
+
+    def addPort(self, port):
+        self.dict[self.current].addPort(port)
+
+    def addSignal(self, name, var):
+        self.dict[self.current].addSignal(name, var)
+
+    def addConst(self, name, var):
+        self.dict[self.current].addConst(name, var)
+
+    def addParamName(self, name):
+        self.dict[self.current].addParamName(name)
+
+    def getSignals(self, name):
+        if name not in self.dict:
+            raise verror.DefinitionError('No such module: %s' % name)
+        return self.dict[name].getSignals()
+
+    def getConsts(self, name):
+        if name not in self.dict:
+            raise verror.DefinitionError('No such module: %s' % name)
+        return self.dict[name].getConsts()
+
+    def getDefinition(self, name):
+        if name not in self.dict:
+            raise verror.DefinitionError('No such module: %s' % name)
+        return self.dict[name].getDefinition()
+
+    def getDefinitions(self):
+        return self.dict
+
+    def getIOPorts(self, name):
+        if name not in self.dict:
+            raise verror.DefinitionError('No such module: %s' % name)
+        return self.dict[name].getIOPorts()
+
+    def getParamNames(self, name):
+        if name not in self.dict:
+            raise verror.DefinitionError('No such module: %s' % name)
+        return self.dict[name].getParamNames()
+
+    def get_names(self):
+        ret = []
+        for dk, dv in self.dict.items():
+            ret.append(dk)
+        return ret
+
+    def overwriteDefinition(self, name, definition):
+        self.dict[name] = definition
+
+    def copyDefinition(self, f, t):
+        self.dict[t] = copy.deepcopy(self.dict[f])
+        self.dict[t].definition.name = t
+        self.dict[t].name = t
+
+
+class ModuleInfo(DefinitionInfo):
+    pass
+
+
+class ModuleInfoTable(DefinitionInfoTable):
+    pass
+
+
+class FunctionInfo(DefinitionInfo):
+    pass
+
+
+class FunctionInfoTable(DefinitionInfoTable):
+    pass
+
+
+class TaskInfo(DefinitionInfo):
+    pass
+
+
+class TaskInfoTable(DefinitionInfoTable):
+    pass
+
+
+frametype_list = ('ifthen', 'ifelse', 'case', 'for', 'while', 'none')
+
+
+class Frame(object):
+    def __init__(self, name, previous, frametype='none',
+                 alwaysinfo=None, condition=None,
+                 module=False, functioncall=False, taskcall=False,
+                 generate=False, always=False, initial=False, loop=None, loop_iter=None,
+                 modulename=None):
+        self.name = name
+        self.previous = previous
+        self.next = []
+        self.frametype = frametype
+
+        self.alwaysinfo = alwaysinfo
+        self.condition = condition
+
+        self.module = module
+        self.functioncall = functioncall
+        self.taskcall = taskcall
+        self.generate = generate
+        self.always = always
+        self.initial = initial
+        self.loop = loop
+        self.loop_iter = loop_iter
+
+        self.variables = Variables()
+        self.functions = FunctionInfoTable()
+        self.tasks = TaskInfoTable()
+        self.blockingassign = collections.OrderedDict()
+        self.nonblockingassign = collections.OrderedDict()
+
+        self.modulename = modulename
+
+    def getName(self):
+        return self.name
+
+    def getPrevious(self):
+        return self.previous
+
+    def getNext(self):
+        return self.next
+
+    def getFrametype(self):
+        return self.frametype
+
+    def isIfelse(self):
+        return self.frametype == 'ifelse'
+
+    def getAlwaysInfo(self):
+        return self.alwaysinfo
+
+    def getCondition(self):
+        return self.condition
+
+    def isModule(self):
+        return self.module
+
+    def isFunctioncall(self):
+        return self.functioncall
+
+    def isTaskcall(self):
+        return self.taskcall
+
+    def isGenerate(self):
+        return self.generate
+
+    def isAlways(self):
+        return self.always
+
+    def isInitial(self):
+        return self.initial
+
+    def setNext(self, nextframe):
+        self.next.append(nextframe)
+
+    def setAlwaysInfo(self, clock_name, clock_edge, clock_bit,
+                      reset_name, reset_edge, reset_bit, senslist):
+        self.alwaysinfo = AlwaysInfo(clock_name, clock_edge, clock_bit,
+                                     reset_name, reset_edge, reset_bit, senslist)
+
+    def addSignal(self, node):
+        self.variables.addSignal(node.name, node)
+
+    def addConst(self, node):
+        self.variables.addConst(node.name, node)
+
+    def addGenvar(self, node):
+        self.variables.addGenvar(node.name, 0)
+
+    def addFunction(self, node):
+        self.functions.addDefinition(node.name, node)
+
+    def addTask(self, node):
+        self.tasks.addDefinition(node.name, node)
+
+    def addFunctionPort(self, node):
+        self.functions.addPort(node)
+
+    def addTaskPort(self, node):
+        self.tasks.addPort(node)
+
+    def updateSignal(self, signal):
+        self.variables.updateSignal(signal)
+
+    def updateConst(self, const):
+        self.variables.updateConst(const)
+
+    def getConstant(self, name):
+        return self.variables.getConst(name)
+
+    def hasConstant(self, name):
+        return self.variables.hasConst(name)
+
+    def getSignal(self, name):
+        return self.variables.getSignal(name)
+
+    def hasSignal(self, name):
+        return self.variables.hasSignal(name)
+
+    def getSignals(self):
+        return self.variables.getSignals()
+
+    def getConsts(self):
+        return self.variables.getConsts()
+
+    def getFunctions(self):
+        return self.functions.getDefinitions()
+
+    def getTasks(self):
+        return self.tasks.getDefinitions()
+
+    def getModuleName(self):
+        return self.modulename
+
+    def setBlockingAssign(self, dst, bind):
+        if not dst in self.blockingassign:
+            self.blockingassign[dst] = (bind,)
+            return
+        current = self.blockingassign[dst]
+        for c_i, c in enumerate(current):
+            if c.msb == bind.msb and c.msb == bind.msb and c.ptr == bind.ptr:
+                self.blockingassign[dst][c_i].tree = bind.tree
+                return
+        self.blockingassign[dst] = current + (bind,)
+
+    def getBlockingAssign(self, dst):
+        if dst in self.blockingassign:
+            return self.blockingassign[dst]
+        return ()
+
+    def getBlockingAssigns(self):
+        return self.blockingassign
+
+    def addNonblockingAssign(self, dst, bind):
+        if not dst in self.nonblockingassign:
+            self.nonblockingassign[dst] = (copy.deepcopy(bind),)
+            return
+        current = self.nonblockingassign[dst]
+        for c_i, c in enumerate(current):
+            if c.msb == bind.msb and c.msb == bind.msb and c.ptr == bind.ptr:
+                self.nonblockingassign[dst][c_i].tree = copy.deepcopy(bind.tree)
+                return
+        self.nonblockingassign[dst] = current + (copy.deepcopy(bind),)
+
+    def getNonblockingAssigns(self):
+        return self.nonblockingassign
+
+
+class FrameTable(object):
+    def __init__(self):
+        self.dict = {}
+        self.current = ScopeChain()
+
+        self.function_def = False
+        self.task_def = False
+        self.for_pre = False
+        self.for_post = False
+        self.for_iter = None
+
+    def toScopeChain(self, scopename):
+        if scopename is None:
+            return self.current
+        return self.current + scopename
+
+    def addFrame(self, scopename,
+                 frametype='none',
+                 alwaysinfo=None, condition=None,
+                 module=False, functioncall=False, taskcall=False,
+                 generate=False, always=False, initial=False, loop=None, loop_iter=None,
+                 modulename=None):
+
+        scopechain = self.toScopeChain(scopename)
+        if scopechain in self.dict:
+            raise verror.DefinitionError('Already Exists: %s' % str(scopechain))
+        ret = self.current
+        previous = self.current
+        if len(previous) > 0:
+            self.dict[previous].setNext(scopechain)
+        self.dict[scopechain] = Frame(scopechain, previous, frametype=frametype,
+                                      alwaysinfo=alwaysinfo, condition=condition,
+                                      module=module, functioncall=functioncall,
+                                      taskcall=taskcall, generate=generate,
+                                      always=always, initial=initial, loop=loop, loop_iter=loop_iter,
+                                      modulename=modulename)
+        self.current = scopechain
+        return ret
+
+    def hasFrame(self, scope):
+        return scope in self.dict
+
+    def getFrametype(self):
+        return self.dict[self.current].getFrametype()
+
+    def getAlwaysInfo(self):
+        return self.dict[self.current].getAlwaysInfo()
+
+    def getCondition(self):
+        return self.dict[self.current].getCondition()
+
+    def isModule(self):
+        return self.dict[self.current].isModule()
+
+    def isFunctioncall(self):
+        return self.dict[self.current].isFunctioncall()
+
+    def isTaskcall(self):
+        return self.dict[self.current].isTaskcall()
+
+    def isGenerate(self):
+        return self.dict[self.current].isGenerate()
+
+    def isAlways(self):
+        return self.dict[self.current].isAlways()
+
+    def isInitial(self):
+        return self.dict[self.current].isInitial()
+
+    def getLoop(self):
+        return self.dict[self.current].loop
+
+    def getLoopIter(self):
+        return self.dict[self.current].loop_iter
+
+    def isFunctiondef(self):
+        return self.function_def
+
+    def isTaskdef(self):
+        return self.task_def
+
+    def isForpre(self):
+        return self.for_pre
+
+    def isForpost(self):
+        return self.for_post
+
+    def setFunctionDef(self):
+        self.function_def = True
+
+    def unsetFunctionDef(self):
+        self.function_def = False
+
+    def setTaskDef(self):
+        self.task_def = True
+
+    def unsetTaskDef(self):
+        self.task_def = False
+
+    def setForPre(self):
+        self.for_pre = True
+
+    def unsetForPre(self):
+        self.for_pre = False
+
+    def setForPost(self):
+        self.for_post = True
+
+    def unsetForPost(self):
+        self.for_post = False
+
+    def setForIter(self, iter):
+        self.for_iter = iter
+
+    def getForIter(self):
+        return self.for_iter
+
+    def setAlwaysInfo(self, clock_name, clock_edge, clock_bit,
+                      reset_name, reset_edge, reset_bit, senslist):
+        self.dict[self.current].setAlwaysInfo(clock_name, clock_edge, clock_bit,
+                                              reset_name, reset_edge, reset_bit, senslist)
+
+    def setCurrent(self, current):
+        self.current = current
+
+    def getCurrent(self):
+        return self.current
+
+    def getModuleName(self):
+        return self.dict[self.current].getModuleName()
+
+    def getLabelKey(self, name):
+        ret = ''
+        if self.isModule():
+            ret += 'md_'
+        if self.isGenerate():
+            ret += 'ge_'
+        if self.isAlways():
+            ret += 'al_'
+        if self.isInitial():
+            ret += 'in_'
+        if self.isFunctioncall():
+            ret += 'fc_'
+        if self.isTaskcall():
+            ret += 'tc_'
+        return ret + name
+
+    def addSignal(self, var):
+        if self.function_def and isinstance(var, Input):
+            self.dict[self.current].addFunctionPort(var)
+            return
+        if self.task_def and isinstance(var, Input):
+            self.dict[self.current].addTaskPort(var)
+            return
+        self.dict[self.current].addSignal(var)
+
+    def addConst(self, var):
+        self.dict[self.current].addConst(var)
+
+    def addGenvar(self, var):
+        self.dict[self.current].addGenvar(var)
+
+    def addFunction(self, var):
+        self.dict[self.current].addFunction(var)
+
+    def addTask(self, var):
+        self.dict[self.current].addTask(var)
+
+    def updateSignal(self, signal):
+        self.dict[self.current].updateSignal(signal)
+
+    def updateConst(self, const):
+        self.dict[self.current].updateConst(const)
+
+    def getAllInstances(self):
+        ret = []
+        for dk in self.dict.keys():
+            if dk[-1].scopetype == 'module':
+                ret.append((dk, self.dict[dk].getModuleName()))
+        return tuple(ret)
+
+    def getAllSignals(self):
+        ret = collections.OrderedDict()
+        for dk, dv in self.dict.items():
+            ret.update(
+                map_key((lambda x: dk + ScopeLabel(x, 'signal')), dv.getSignals()))
+        return ret
+
+    def getAllConsts(self):
+        ret = collections.OrderedDict()
+        for dk, dv in self.dict.items():
+            ret.update(
+                map_key((lambda x: dk + ScopeLabel(x, 'signal')), dv.getConsts()))
+        return ret
+
+    def getAllFunctions(self):
+        ret = collections.OrderedDict()
+        for dk, dv in self.dict.items():
+            ret.update(
+                map_key((lambda x: dk + ScopeLabel(x, 'function')), dv.getFunctions()))
+        return ret
+
+    def getAllTasks(self):
+        ret = collections.OrderedDict()
+        for dk, dv in self.dict.items():
+            ret.update(
+                map_key((lambda x: dk + ScopeLabel(x, 'task')), dv.getTasks()))
+        return ret
+
+    def getSignals(self, scope):
+        return map_key(
+            (lambda x: scope + ScopeLabel(x, 'signal')), self.dict[scope].getSignals())
+
+    def getConsts(self, scope):
+        return map_key(
+            (lambda x: scope + ScopeLabel(x, 'signal')), self.dict[scope].getConsts())
+
+    def getFunctions(self, scope):
+        return map_key(
+            (lambda x: scope + ScopeLabel(x, 'function')), self.dict[scope].getFunctions())
+
+    def getTasks(self, scope):
+        return map_key(
+            (lambda x: scope + ScopeLabel(x, 'task')), self.dict[scope].getTasks())
+
+    def getGenerateConditions(self):
+        ret = []
+        ptr = self.current
+        while True:
+            frame = self.dict[ptr]
+            if not frame.isGenerate():
+                break
+            if frame.loop is not None:  # generate for
+                ret.append((frame.loop_iter, frame.loop))
+            elif frame.condition is not None:  # generate if
+                if frame.isIfelse():
+                    ret.append((None, Ulnot(frame.condition)))
+                else:
+                    ret.append((None, frame.condition))
+            ptr = self.dict[ptr].previous
+        return tuple(reversed(ret))
+
+    def getAlwaysStatus(self):
+        ptr = self.current
+        frame = self.dict[ptr]
+        alwaysinfo = frame.getAlwaysInfo()
+        while True:
+            if frame.isFunctioncall():
+                return None
+            if frame.isTaskcall():
+                return None
+            if not frame.isAlways():
+                return None
+            if alwaysinfo is not None:
+                return alwaysinfo
+            ptr = self.dict[ptr].previous
+            frame = self.dict[ptr]
+            alwaysinfo = frame.getAlwaysInfo()
+
+    def setBlockingAssign(self, dst, bind, scope):
+        self.dict[scope].setBlockingAssign(dst, bind)
+
+    def getBlockingAssign(self, dst, scope):
+        p = scope
+        while self.dict[p].isAlways():
+            ret = self.dict[p].getBlockingAssign(dst)
+            if ret:
+                return ret
+            p = self.dict[p].getPrevious()
+        return ()
+
+    def addNonblockingAssign(self, dst, bind):
+        self.dict[self.current].addNonblockingAssign(dst, bind)
+
+    def getBlockingAssigns(self):
+        return self.dict[self.current].getBlockingAssigns()
+
+    def getBlockingAssignsScope(self, scope):
+        return self.dict[scope].getBlockingAssigns()
+
+    def getNonblockingAssigns(self):
+        return self.dict[self.current].getNonblockingAssigns()
+
+    def getPreviousNonblockingAssign(self):
+        previous = self.dict[self.current].previous
+        if len(previous) == 0:
+            return collections.OrderedDict()
+        previous_frame = self.dict[previous]
+        if not previous_frame.isAlways():
+            return collections.OrderedDict()
+        return previous_frame.getNonblockingAssigns()
+
+    def searchConstantDefinition(self, key, name):
+        if self.dict[key].hasConstant(name):
+            return key, self.dict[key].getConstant(name)
+        if self.dict[key].isModule():
+            return None, None
+        previous = self.dict[key].getPrevious()
+        return self.searchConstantDefinition(previous, name)
+
+    def getConstantDefinition(self, key, name):
+        if self.dict[key].hasConstant(name):
+            return self.dict[key].getConstant(name)
+        return None
+
+    def searchSignalDefinition(self, key, name):
+        if self.dict[key].hasSignal(name):
+            return key, self.dict[key].getSignal(name)
+        if self.dict[key].isModule():
+            return None, None
+        previous = self.dict[key].getPrevious()
+        return self.searchSignalDefinition(previous, name)
+
+    def searchMatchedScopeChain(self, currentchain, targetchain):
+        skiplength = len(currentchain) - 1
+        printable = currentchain[skiplength].isPrintable()
+
+        if printable:
+            if currentchain[skiplength] != targetchain[0]:  # not match
+                return None
+            if len(targetchain) == 1:
+                return ScopeChain([targetchain[0]])
+            for nextframe in self.dict[currentchain].getNext():
+                rslt = self.searchMatchedScopeChain(nextframe, targetchain[1:])
+                if rslt is not None:
+                    return ScopeChain([currentchain[skiplength]]) + rslt
+            return None
+
+        if (currentchain[skiplength].scopetype == 'for' and
+                targetchain[0].scopetype == 'for'):
+            if currentchain[skiplength].scopeloop != targetchain[0].scopeloop:
+                return None
+            if len(targetchain) == 1:
+                return ScopeChain([targetchain[0]])
+            for nextframe in self.dict[currentchain].getNext():
+                rslt = self.searchMatchedScopeChain(nextframe, targetchain[1:])
+                if rslt is not None:
+                    return ScopeChain([currentchain[skiplength]]) + rslt
+
+            return None
+
+        for nextframe in self.dict[currentchain].getNext():
+            rslt = self.searchMatchedScopeChain(nextframe, targetchain)
+            if rslt is not None:
+                return ScopeChain([currentchain[skiplength]]) + rslt
+        return None
diff --git a/venv/lib/python3.9/site-packages/pyverilog/dataflow/walker.py b/venv/lib/python3.9/site-packages/pyverilog/dataflow/walker.py
new file mode 100644
index 0000000..5b69358
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/dataflow/walker.py
@@ -0,0 +1,121 @@
+# -------------------------------------------------------------------------------
+# walker.py
+#
+# Dataflow graph walker
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.utils.util as util
+import pyverilog.utils.verror as verror
+import pyverilog.utils.signaltype as signaltype
+import pyverilog.dataflow.replace as replace
+from pyverilog.dataflow.dataflow import *
+from pyverilog.dataflow.visit import *
+from pyverilog.dataflow.merge import VerilogDataflowMerge
+
+
+class VerilogDataflowWalker(VerilogDataflowMerge):
+    def __init__(self, topmodule, terms, binddict, resolved_terms, resolved_binddict, constlist):
+        VerilogDataflowMerge.__init__(self, topmodule, terms, binddict,
+                                      resolved_terms, resolved_binddict, constlist)
+
+    def walkBind(self, name, step=0):
+        termname = util.toTermname(name)
+        if not termname in self.terms:
+            raise verror.DefinitionError('No such signals: %s' % str(name))
+        tree = self.getTree(termname)
+        walked_tree = self.walkTree(tree, visited=set(), step=step)
+        return replace.replaceUndefined(walked_tree, termname)
+
+    def walkTree(self, tree, visited=set([]), step=0, delay=False, msb=None, lsb=None, ptr=None):
+        if tree is None:
+            return DFUndefined(32)
+
+        if isinstance(tree, DFUndefined):
+            return tree
+
+        if isinstance(tree, DFHighImpedance):
+            return tree
+
+        if isinstance(tree, DFConstant):
+            return tree
+
+        if isinstance(tree, DFEvalValue):
+            return tree
+
+        if isinstance(tree, DFTerminal):
+            scope = util.getScope(tree.name)
+            termname = tree.name
+            if termname in visited:
+                return tree
+
+            termtype = self.getTermtype(termname)
+            if util.isTopmodule(scope) and signaltype.isInput(termtype):
+                return tree
+
+            nptr = None
+            if self.getTermDims(termname) is not None:
+                if ptr is None:
+                    raise verror.FormatError('Array variable requires an pointer.')
+                if msb is not None and lsb is not None:
+                    return tree
+                nptr = ptr
+
+            nextstep = step
+            if signaltype.isReg(termtype):
+                if (not self.isCombination(termname) and
+                    not signaltype.isRename(termtype) and
+                        nextstep == 0):
+                    return tree
+                if (not self.isCombination(termname)
+                        and not signaltype.isRename(termtype)):
+                    nextstep -= 1
+
+            return self.walkTree(self.getTree(termname, nptr),
+                                 visited | set([termname, ]), nextstep, delay)
+
+        if isinstance(tree, DFBranch):
+            condnode = self.walkTree(tree.condnode, visited, step, delay)
+            truenode = self.walkTree(tree.truenode, visited, step, delay)
+            falsenode = self.walkTree(tree.falsenode, visited, step, delay)
+            return DFBranch(condnode, truenode, falsenode)
+
+        if isinstance(tree, DFOperator):
+            nextnodes = []
+            for n in tree.nextnodes:
+                nextnodes.append(self.walkTree(n, visited, step, delay))
+            return DFOperator(tuple(nextnodes), tree.operator)
+
+        if isinstance(tree, DFPartselect):
+            msb = self.walkTree(tree.msb, visited, step, delay)
+            lsb = self.walkTree(tree.lsb, visited, step, delay)
+            var = self.walkTree(tree.var, visited, step, delay, msb=msb, lsb=lsb)
+            if isinstance(var, DFPartselect):
+                child_lsb = self.getTerm(str(tree.var)).lsb.eval()
+                return DFPartselect(var.var, DFIntConst(str(msb.eval() + var.lsb.eval() - child_lsb)),
+                                    DFIntConst(str(lsb.eval() + var.lsb.eval() - child_lsb)))
+            return DFPartselect(var, msb, lsb)
+
+        if isinstance(tree, DFPointer):
+            ptr = self.walkTree(tree.ptr, visited, step, delay)
+            var = self.walkTree(tree.var, visited, step, delay, ptr=ptr)
+            if isinstance(tree.var, DFTerminal):
+                if (self.getTermDims(tree.var.name) is not None and
+                        not (isinstance(var, DFTerminal) and var.name == tree.var.name)):
+                    return var
+            return DFPointer(var, ptr)
+
+        if isinstance(tree, DFConcat):
+            nextnodes = []
+            for n in tree.nextnodes:
+                nextnodes.append(self.walkTree(n, visited, step, delay))
+            return DFConcat(tuple(nextnodes))
+
+        raise verror.DefinitionError(
+            'Undefined Node Type: %s : %s' % (str(type(tree)), str(tree)))
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/__init__.py b/venv/lib/python3.9/site-packages/pyverilog/utils/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/__init__.py
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new file mode 100644
index 0000000..354e15f
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+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/__pycache__/__init__.cpython-39.pyc
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new file mode 100644
index 0000000..014e4c4
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diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/__pycache__/verror.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/utils/__pycache__/verror.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/identifierreplace.py b/venv/lib/python3.9/site-packages/pyverilog/utils/identifierreplace.py
new file mode 100644
index 0000000..65355b3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/identifierreplace.py
@@ -0,0 +1,78 @@
+# -------------------------------------------------------------------------------
+# identifierreplace.py
+#
+# Replaces identifier names based on a given dict
+#
+# Copyright (C) 2015, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+import pyverilog.vparser.ast as vast
+from pyverilog.vparser.ast import Node
+
+
+def replaceIdentifiers(node, ids):
+    v = IdentifierReplace(ids)
+    return v.visit(node)
+
+
+def ischild(node, attr):
+    if not isinstance(node, Node):
+        return False
+    excludes = ('coord', 'attr_names',)
+    if attr.startswith('__'):
+        return False
+    if attr in excludes:
+        return False
+    attr_names = getattr(node, 'attr_names')
+    if attr in attr_names:
+        return False
+    attr_test = getattr(node, attr)
+    if hasattr(attr_test, '__call__'):
+        return False
+    return True
+
+
+def children_items(node):
+    children = [attr for attr in dir(node) if ischild(node, attr)]
+    ret = []
+    for c in children:
+        ret.append((c, getattr(node, c)))
+    return ret
+
+
+class IdentifierReplace(object):
+    def __init__(self, ids):
+        self.ids = ids
+
+    def visit(self, node):
+        method = 'visit_' + node.__class__.__name__
+        visitor = getattr(self, method, self.generic_visit)
+        ret = visitor(node)
+        if ret is None:
+            return node
+        return ret
+
+    def generic_visit(self, node):
+        for name, child in children_items(node):
+            ret = None
+            if child is None:
+                continue
+            if (isinstance(child, list) or isinstance(child, tuple)):
+                r = []
+                for c in child:
+                    r.append(self.visit(c))
+                ret = tuple(r)
+            else:
+                ret = self.visit(child)
+            setattr(node, name, ret)
+        return node
+
+    def visit_Identifier(self, node):
+        if node.name in self.ids:
+            return vast.Identifier(self.ids[node.name])
+        return node
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/identifiervisitor.py b/venv/lib/python3.9/site-packages/pyverilog/utils/identifiervisitor.py
new file mode 100644
index 0000000..2f906ef
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/identifiervisitor.py
@@ -0,0 +1,35 @@
+# -------------------------------------------------------------------------------
+# identifiervisitor.py
+#
+# Identifier list generator in a nested operator
+#
+# Copyright (C) 2015, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.dataflow.visit import NodeVisitor
+
+
+def getIdentifiers(node):
+    v = IdentifierVisitor()
+    v.visit(node)
+    ids = v.getIdentifiers()
+    return ids
+
+
+class IdentifierVisitor(NodeVisitor):
+    def __init__(self):
+        self.identifiers = []
+
+    def getIdentifiers(self):
+        return tuple(self.identifiers)
+
+    def reset(self):
+        self.identifiers = []
+
+    def visit_Identifier(self, node):
+        self.identifiers.append(node.name)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/inference.py b/venv/lib/python3.9/site-packages/pyverilog/utils/inference.py
new file mode 100644
index 0000000..d241360
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/inference.py
@@ -0,0 +1,102 @@
+# -------------------------------------------------------------------------------
+# inference.py
+#
+# Value inference
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+
+from pyverilog.dataflow.dataflow import *
+import pyverilog.utils.verror as verror
+
+this = sys.modules[__name__]
+
+
+def infer(op, node):
+    # if not isinstance(node, DFEvalValue): return None
+    if not isinstance(node, DFEvalValue):
+        raise verror.FormatError('Can not infer the value from non DFEvalValue object')
+    val = node.value
+    funcname = 'op_' + op
+    opfunc = getattr(this, funcname, op_None)
+    return opfunc(val)
+
+
+def op_LessThan(val):
+    minval = 0
+    maxval = val - 1
+    if maxval < 0:
+        minval = None
+        maxval = None
+    return InferredValue(minval, maxval)
+
+
+def op_GreaterThan(val):
+    minval = val + 1
+    maxval = None
+    return InferredValue(minval, maxval)
+
+
+def op_LassEq(val):
+    minval = 0
+    maxval = val
+    return InferredValue(minval, maxval)
+
+
+def op_GreaterEq(val):
+    minval = val
+    maxval = None
+    return InferredValue(minval, maxval)
+
+
+def op_Eq(val):
+    minval = val
+    maxval = val
+    return InferredValue(minval, maxval)
+
+
+def op_NotEq(val):
+    minval = val
+    maxval = val
+    return InferredValue(minval, maxval, inv=True)
+
+
+def op_Eql(val):
+    minval = val
+    maxval = val
+    return InferredValue(minval, maxval)
+
+
+def op_NotEql(val):
+    minval = val
+    maxval = val
+    return InferredValue(minval, maxval, inv=True)
+
+
+def op_None(val):
+    raise verror.FormatError('Unsupported Comparator')
+
+
+class InferredValue(object):
+    def __init__(self, minval, maxval, inv=False):
+        self.minval = minval
+        self.maxval = maxval
+        self.inv = inv
+
+    def __repr__(self):
+        ret = ''
+        if self.inv:
+            ret += '(INV '
+        ret += 'min:' + str(self.minval)
+        ret += ' max:' + str(self.maxval)
+        if self.inv:
+            ret += ')'
+        return ret
+
+    def invert(self):
+        self.inv = not self.inv
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/op2mark.py b/venv/lib/python3.9/site-packages/pyverilog/utils/op2mark.py
new file mode 100644
index 0000000..e97c2da
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/op2mark.py
@@ -0,0 +1,49 @@
+# -------------------------------------------------------------------------------
+# op2mark.py
+#
+# converting an operator to its mark
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+
+operator_mark = {
+    'Uminus': '-', 'Ulnot': '!', 'Unot': '~', 'Uand': '&', 'Unand': '~&',
+    'Uor': '|', 'Unor': '~|', 'Uxor': '^', 'Uxnor': '~^',
+    'Power': '**', 'Times': '*', 'Divide': '/', 'Mod': '%',
+    'Plus': '+', 'Minus': '-',
+    'Sll': '<<', 'Srl': '>>', 'Sla': '<<<', 'Sra': '>>>',
+    'LessThan': '<', 'GreaterThan': '>', 'LessEq': '<=', 'GreaterEq': '>=',
+    'Eq': '==', 'NotEq': '!=', 'Eql': '===', 'NotEql': '!==',
+    'And': '&', 'Xor': '^', 'Xnor': '~^',
+    'Or': '|', 'Land': '&&', 'Lor': '||'
+}
+
+
+def op2mark(op):
+    if op not in operator_mark:
+        return None
+    return operator_mark[op]
+
+
+operator_order = {
+    'Uminus': 0, 'Ulnot': 0, 'Unot': 0, 'Uand': 0, 'Unand': 0,
+    'Uor': 0, 'Unor': 0, 'Uxor': 0, 'Uxnor': 0,
+    'Power': 1,
+    'Times': 2, 'Divide': 2, 'Mod': 2,
+    'Plus': 3, 'Minus': 3,
+    'Sll': 4, 'Srl': 4, 'Sla': 4, 'Sra': 4,
+    'LessThan': 5, 'GreaterThan': 5, 'LessEq': 5, 'GreaterEq': 5,
+    'Eq': 6, 'NotEq': 6, 'Eql': 6, 'NotEql': 6,
+    'And': 7,
+    'Xor': 8, 'Xnor': 8,
+    'Or': 9,
+    'Land': 10,
+    'Lor': 11
+}
+
+
+def op2order(op):
+    if op not in operator_order:
+        return None
+    return operator_order[op]
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/scope.py b/venv/lib/python3.9/site-packages/pyverilog/utils/scope.py
new file mode 100644
index 0000000..eb02ee4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/scope.py
@@ -0,0 +1,139 @@
+# -------------------------------------------------------------------------------
+# scope.py
+#
+# classes for definition of scope
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import copy
+
+scopetype_list_unprint = ('generate', 'always', 'function',  # 'functioncall',
+                          'task', 'taskcall', 'initial', 'for', 'while', 'if')
+scopetype_list_print = ('module', 'block', 'signal', 'functioncall',)
+scopetype_list = scopetype_list_unprint + scopetype_list_print + ('any', )
+
+
+class ScopeLabel(object):
+    def __init__(self, scopename, scopetype='any', scopeloop=None):
+        self.scopename = scopename
+        if scopetype not in scopetype_list:
+            raise DefinitionError('No such Scope type')
+        self.scopetype = scopetype
+        self.scopeloop = scopeloop
+
+    def __repr__(self):
+        ret = []
+        ret.append(self.scopename)
+        if self.scopeloop is not None:
+            ret.append('[')
+            ret.append(str(self.scopeloop))
+            ret.append(']')
+        return ''.join(ret)
+
+    def tocode(self):
+        if self.scopetype in scopetype_list_unprint:
+            return ''
+        return self.scopename
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        if self.scopetype == 'any' or other.scopetype == 'any':
+            return ((self.scopename, self.scopeloop)
+                    == (other.scopename, other.scopeloop))
+        return (self.scopename, self.scopetype, self.scopeloop) == (other.scopename, other.scopetype, other.scopeloop)
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        # return hash((self.scopename, self.scopetype, self.scopeloop))
+        return hash((self.scopename, self.scopeloop))  # to use for dict key with any scopetype
+
+    def isPrintable(self):
+        return self.scopetype in (scopetype_list_print + ('any',))
+
+
+class ScopeChain(object):
+    def __init__(self, scopechain=None):
+        self.scopechain = []
+        if scopechain is not None:
+            self.scopechain = scopechain
+
+    def __add__(self, r):
+        new_chain = copy.deepcopy(self)
+        if isinstance(r, ScopeLabel):
+            new_chain.append(r)
+        elif isinstance(r, ScopeChain):
+            new_chain.extend(r.scopechain)
+        else:
+            raise verror.DefinitionError('Can not add %s' % str(r))
+        return new_chain
+
+    def append(self, r):
+        self.scopechain.append(r)
+
+    def extend(self, r):
+        self.scopechain.extend(r)
+
+    def tocode(self):
+        ret = []
+        it = None
+        for scope in self.scopechain:
+            l = scope.tocode()
+            if l:
+                ret.append(l)
+            if it is not None:
+                ret.append(it)
+            if l:
+                # ret.append('.')
+                # ret.append('_dot_')
+                ret.append('_')
+            if scope.scopetype == 'for' and scope.scopeloop is not None:
+                #it = '[' + str(scope.scopeloop) + ']'
+                #it = '_L_' + str(scope.scopeloop) + '_R_'
+                it = '_' + str(scope.scopeloop) + '_'
+            else:
+                it = None
+        ret = ret[:-1]
+        return ''.join(ret)
+
+    def get_module_list(self):
+        return [scope for scope in self.scopechain if scope.scopetype == 'module']
+
+    def __repr__(self):
+        ret = ''
+        for scope in self.scopechain:
+            l = scope.__repr__()
+            ret += l + '.'
+        ret = ret[:-1]
+        return ret
+
+    def __len__(self):
+        return len(self.scopechain)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+        return self.scopechain == other.scopechain
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        return hash(tuple(self.scopechain))
+
+    def __getitem__(self, key):
+        if isinstance(key, slice):
+            indices = key.indices(len(self))
+            return ScopeChain([self.scopechain[x] for x in range(*indices)])
+        return self.scopechain[key]
+
+    def __iter__(self):
+        for scope in self.scopechain:
+            yield scope
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/signaltype.py b/venv/lib/python3.9/site-packages/pyverilog/utils/signaltype.py
new file mode 100644
index 0000000..4371c52
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/signaltype.py
@@ -0,0 +1,122 @@
+# -------------------------------------------------------------------------------
+# signaltype.py
+#
+# Signal type checker to create precise assignment tree
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import re
+
+
+# Verilog Signal Type Checker
+def isType(termtype, matchtype):
+    for t in termtype:
+        if t == matchtype:
+            return True
+    return False
+
+
+def isInput(termtype):
+    return isType(termtype, 'Input')
+
+
+def isOutput(termtype):
+    return isType(termtype, 'Output')
+
+
+def isInout(termtype):
+    return isType(termtype, 'Inout')
+
+
+def isWire(termtype):
+    return isType(termtype, 'Wire')
+
+
+def isReg(termtype):
+    return isType(termtype, 'Reg')
+
+
+def isInteger(termtype):
+    return isType(termtype, 'Integer')
+
+
+def isGenvar(termtype):
+    return isType(termtype, 'Genvar')
+
+
+def isParameter(termtype):
+    return isType(termtype, 'Parameter')
+
+
+def isLocalparam(termtype):
+    return isType(termtype, 'Localparam')
+
+
+def isFunction(termtype):
+    return isType(termtype, 'Function')
+
+
+def isRename(termtype):
+    return isType(termtype, 'Rename')
+
+
+# Clock/Reset
+regex_clock = ['clk', 'clock', ]
+regex_reset = ['reset', 'rst', ]
+
+
+def isClock(search_str):
+    lower_str = search_str.lower()
+    for rc in regex_clock:
+        if re.search(rc, lower_str):
+            return True
+    return False
+
+
+def isReset(search_str):
+    lower_str = search_str.lower()
+    for rr in regex_reset:
+        if re.search(rr, lower_str):
+            return True
+    return False
+
+
+# Operator
+compare_ops = ('LessThan', 'GreaterThan', 'LassEq', 'GreaterEq', 'Eq', 'NotEq', 'Eql', 'NotEql')
+not_ops = ('Ulnot', 'Unot')
+split_and_ops = ('And', 'Land')
+split_or_ops = ('Or', 'Lor')
+non_condition_ops = compare_ops + not_ops + split_and_ops + split_or_ops
+
+
+def isCompare(op):
+    if op in compare_ops:
+        return True
+    return False
+
+
+def isNot(op):
+    if op in not_ops:
+        return True
+    return False
+
+
+def isAnd(op):
+    if op in split_and_ops:
+        return True
+    return False
+
+
+def isOr(op):
+    if op in split_or_ops:
+        return True
+    return False
+
+
+def isNonConditionOp(op):
+    if op in non_condition_ops:
+        return False
+    return True
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/util.py b/venv/lib/python3.9/site-packages/pyverilog/utils/util.py
new file mode 100644
index 0000000..c47dd46
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/util.py
@@ -0,0 +1,87 @@
+# -------------------------------------------------------------------------------
+# util.py
+#
+# utility functions for Pyverilog
+#
+# Copyright (C) 2013, Shinya Takamaeda-Yamazaki
+# License: Apache 2.0
+# -------------------------------------------------------------------------------
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import copy
+
+from pyverilog.utils.scope import ScopeLabel, ScopeChain
+
+
+def toTermname(name):
+    if isinstance(name, str):
+        return toTermname_str(name)
+    if isinstance(name, list):
+        return toTermname_list(name)
+    if isinstance(name, tuple):
+        return toTermname_list(name)
+    raise TypeError()
+
+
+def toTermname_str(name):
+    scopechain_list = []
+    for n in name.split('.'):
+        # fix me: to support "module.scope.signal[ptr]", lexical analyzer is required.
+        scopechain_list.append(ScopeLabel(n, 'any'))
+    return ScopeChain(scopechain_list)
+
+
+def toTermname_list(name):
+    scopechain_list = []
+    for n in name:
+        if not isinstance(n, str):
+            raise TypeError()
+        scopechain_list.append(ScopeLabel(n, 'any'))
+    return ScopeChain(scopechain_list)
+
+
+def getScope(termname):
+    return termname[:-1]
+
+
+def toFlatname(termname):
+    #flatname = ''
+    # for t in termname:
+    #    flatname += str(t.scopename) + '__'
+    # return flatname[:-2]
+    return termname.tocode()
+
+
+def splitScopeName(termname):
+    scope = termname[:-1]
+    scope_str = ''
+    for s in scope:
+        scope_str += s.scopename + '.'
+    scope_str = scope_str[:-1]
+    signame_str = termname[-1]
+    return scope_str, signame_str
+
+
+def isTopmodule(scope):
+    if len(scope) == 1:
+        return True
+    return False
+
+
+def dictlistmerge(a, b):
+    ret = {}
+    ret.update(a)
+    for bk, bv in b.items():
+        if bk in ret:
+            for bvv in bv:
+                if bvv not in ret[bk]:
+                    ret[bk].append(bvv)
+        else:
+            ret[bk] = bv
+    return ret
+
+
+def maxValue(width):
+    return 2 ** width - 1
diff --git a/venv/lib/python3.9/site-packages/pyverilog/utils/verror.py b/venv/lib/python3.9/site-packages/pyverilog/utils/verror.py
new file mode 100644
index 0000000..cc2978a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/utils/verror.py
@@ -0,0 +1,14 @@
+class PyvError(Exception):
+    pass
+
+
+class ImplementationError(PyvError):
+    pass
+
+
+class FormatError(PyvError):
+    pass
+
+
+class DefinitionError(PyvError):
+    pass
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__init__.py b/venv/lib/python3.9/site-packages/pyverilog/vparser/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__init__.py
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..293fb67
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/ast.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/ast.cpython-39.pyc
new file mode 100644
index 0000000..a815be0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/ast.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/lexer.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/lexer.cpython-39.pyc
new file mode 100644
index 0000000..03040a5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/lexer.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/parser.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/parser.cpython-39.pyc
new file mode 100644
index 0000000..69f8a9f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/parser.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/preprocessor.cpython-39.pyc b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/preprocessor.cpython-39.pyc
new file mode 100644
index 0000000..66c2061
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/__pycache__/preprocessor.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/ast.py b/venv/lib/python3.9/site-packages/pyverilog/vparser/ast.py
new file mode 100644
index 0000000..492adc9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/ast.py
@@ -0,0 +1,1289 @@
+"""
+   Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import re
+
+
+class Node(object):
+    """ Abstact class for every element in parser """
+
+    def children(self):
+        pass
+
+    def show(self, buf=sys.stdout, offset=0, attrnames=False, showlineno=True):
+        indent = 2
+        lead = ' ' * offset
+
+        buf.write(lead + self.__class__.__name__ + ': ')
+
+        if self.attr_names:
+            if attrnames:
+                nvlist = [(n, getattr(self, n)) for n in self.attr_names]
+                attrstr = ', '.join('%s=%s' % (n, v) for (n, v) in nvlist)
+            else:
+                vlist = [getattr(self, n) for n in self.attr_names]
+                attrstr = ', '.join('%s' % v for v in vlist)
+            buf.write(attrstr)
+
+        if showlineno:
+            buf.write(' (at %s)' % self.lineno)
+
+        buf.write('\n')
+
+        for c in self.children():
+            c.show(buf, offset + indent, attrnames, showlineno)
+
+    def __eq__(self, other):
+        if type(self) != type(other):
+            return False
+
+        self_attrs = tuple([getattr(self, a) for a in self.attr_names])
+        other_attrs = tuple([getattr(other, a) for a in other.attr_names])
+
+        if self_attrs != other_attrs:
+            return False
+
+        other_children = other.children()
+
+        for i, c in enumerate(self.children()):
+            if c != other_children[i]:
+                return False
+
+        return True
+
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
+    def __hash__(self):
+        s = hash(tuple([getattr(self, a) for a in self.attr_names]))
+        c = hash(self.children())
+        return hash((s, c))
+
+
+# ------------------------------------------------------------------------------
+class Source(Node):
+    attr_names = ('name',)
+
+    def __init__(self, name, description, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.description = description
+
+    def children(self):
+        nodelist = []
+        if self.description:
+            nodelist.append(self.description)
+        return tuple(nodelist)
+
+
+class Description(Node):
+    attr_names = ()
+
+    def __init__(self, definitions, lineno=0):
+        self.lineno = lineno
+        self.definitions = definitions
+
+    def children(self):
+        nodelist = []
+        if self.definitions:
+            nodelist.extend(self.definitions)
+        return tuple(nodelist)
+
+
+class ModuleDef(Node):
+    attr_names = ('name',)
+
+    def __init__(self, name, paramlist, portlist, items, default_nettype='wire', lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.paramlist = paramlist
+        self.portlist = portlist
+        self.items = items
+        self.default_nettype = default_nettype
+
+    def children(self):
+        nodelist = []
+        if self.paramlist:
+            nodelist.append(self.paramlist)
+        if self.portlist:
+            nodelist.append(self.portlist)
+        if self.items:
+            nodelist.extend(self.items)
+        return tuple(nodelist)
+
+
+class Paramlist(Node):
+    attr_names = ()
+
+    def __init__(self, params, lineno=0):
+        self.lineno = lineno
+        self.params = params
+
+    def children(self):
+        nodelist = []
+        if self.params:
+            nodelist.extend(self.params)
+        return tuple(nodelist)
+
+
+class Portlist(Node):
+    attr_names = ()
+
+    def __init__(self, ports, lineno=0):
+        self.lineno = lineno
+        self.ports = ports
+
+    def children(self):
+        nodelist = []
+        if self.ports:
+            nodelist.extend(self.ports)
+        return tuple(nodelist)
+
+
+class Port(Node):
+    attr_names = ('name', 'type',)
+
+    def __init__(self, name, width, dimensions, type, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.width = width
+        self.dimensions = dimensions
+        self.type = type
+
+    def children(self):
+        nodelist = []
+        if self.width:
+            nodelist.append(self.width)
+        return tuple(nodelist)
+
+
+class Width(Node):
+    attr_names = ()
+
+    def __init__(self, msb, lsb, lineno=0):
+        self.lineno = lineno
+        self.msb = msb
+        self.lsb = lsb
+
+    def children(self):
+        nodelist = []
+        if self.msb:
+            nodelist.append(self.msb)
+        if self.lsb:
+            nodelist.append(self.lsb)
+        return tuple(nodelist)
+
+
+class Length(Width):
+    pass
+
+
+class Dimensions(Node):
+    attr_names = ()
+
+    def __init__(self, lengths, lineno=0):
+        self.lineno = lineno
+        self.lengths = lengths
+
+    def children(self):
+        nodelist = []
+        if self.lengths:
+            nodelist.extend(self.lengths)
+        return tuple(nodelist)
+
+
+class Identifier(Node):
+    attr_names = ('name',)
+
+    def __init__(self, name, scope=None, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.scope = scope
+
+    def children(self):
+        nodelist = []
+        if self.scope:
+            nodelist.append(self.scope)
+        return tuple(nodelist)
+
+    def __repr__(self):
+        if self.scope is None:
+            return self.name
+        return self.scope.__repr__() + '.' + self.name
+
+
+class Value(Node):
+    attr_names = ()
+
+    def __init__(self, value, lineno=0):
+        self.lineno = lineno
+        self.value = value
+
+    def children(self):
+        nodelist = []
+        if self.value:
+            nodelist.append(self.value)
+        return tuple(nodelist)
+
+
+class Constant(Value):
+    attr_names = ('value',)
+
+    def __init__(self, value, lineno=0):
+        self.lineno = lineno
+        self.value = value
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+    def __repr__(self):
+        return str(self.value)
+
+
+class IntConst(Constant):
+    pass
+
+
+class FloatConst(Constant):
+    pass
+
+
+class StringConst(Constant):
+    pass
+
+
+class Variable(Value):
+    attr_names = ('name', 'signed')
+
+    def __init__(self, name, width=None, signed=False, dimensions=None, value=None, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.width = width
+        self.signed = signed
+        self.dimensions = dimensions
+        self.value = value
+
+    def children(self):
+        nodelist = []
+        if self.width:
+            nodelist.append(self.width)
+        if self.dimensions:
+            nodelist.append(self.dimensions)
+        if self.value:
+            nodelist.append(self.value)
+        return tuple(nodelist)
+
+
+class Input(Variable):
+    pass
+
+
+class Output(Variable):
+    pass
+
+
+class Inout(Variable):
+    pass
+
+
+class Tri(Variable):
+    pass
+
+
+class Wire(Variable):
+    pass
+
+
+class Reg(Variable):
+    pass
+
+
+class Integer(Variable):
+    pass
+
+
+class Real(Variable):
+    pass
+
+
+class Genvar(Variable):
+    pass
+
+
+class Ioport(Node):
+    attr_names = ()
+
+    def __init__(self, first, second=None, lineno=0):
+        self.lineno = lineno
+        self.first = first
+        self.second = second
+
+    def children(self):
+        nodelist = []
+        if self.first:
+            nodelist.append(self.first)
+        if self.second:
+            nodelist.append(self.second)
+        return tuple(nodelist)
+
+
+class Parameter(Node):
+    attr_names = ('name', 'signed')
+
+    def __init__(self, name, value, width=None, signed=False, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.value = value
+        self.width = width
+        self.signed = signed
+        self.dimensions = None
+
+    def children(self):
+        nodelist = []
+        if self.value:
+            nodelist.append(self.value)
+        if self.width:
+            nodelist.append(self.width)
+        return tuple(nodelist)
+
+
+class Localparam(Parameter):
+    pass
+
+
+class Supply(Parameter):
+    pass
+
+
+class Decl(Node):
+    attr_names = ()
+
+    def __init__(self, list, lineno=0):
+        self.lineno = lineno
+        self.list = list
+
+    def children(self):
+        nodelist = []
+        if self.list:
+            nodelist.extend(self.list)
+        return tuple(nodelist)
+
+
+class Concat(Node):
+    attr_names = ()
+
+    def __init__(self, list, lineno=0):
+        self.lineno = lineno
+        self.list = list
+
+    def children(self):
+        nodelist = []
+        if self.list:
+            nodelist.extend(self.list)
+        return tuple(nodelist)
+
+
+class LConcat(Concat):
+    pass
+
+
+class Repeat(Node):
+    attr_names = ()
+
+    def __init__(self, value, times, lineno=0):
+        self.lineno = lineno
+        self.value = value
+        self.times = times
+
+    def children(self):
+        nodelist = []
+        if self.value:
+            nodelist.append(self.value)
+        if self.times:
+            nodelist.append(self.times)
+        return tuple(nodelist)
+
+
+class Partselect(Node):
+    attr_names = ()
+
+    def __init__(self, var, msb, lsb, lineno=0):
+        self.lineno = lineno
+        self.var = var
+        self.msb = msb
+        self.lsb = lsb
+
+    def children(self):
+        nodelist = []
+        if self.var:
+            nodelist.append(self.var)
+        if self.msb:
+            nodelist.append(self.msb)
+        if self.lsb:
+            nodelist.append(self.lsb)
+        return tuple(nodelist)
+
+
+class Pointer(Node):
+    attr_names = ()
+
+    def __init__(self, var, ptr, lineno=0):
+        self.lineno = lineno
+        self.var = var
+        self.ptr = ptr
+
+    def children(self):
+        nodelist = []
+        if self.var:
+            nodelist.append(self.var)
+        if self.ptr:
+            nodelist.append(self.ptr)
+        return tuple(nodelist)
+
+
+class Lvalue(Node):
+    attr_names = ()
+
+    def __init__(self, var, lineno=0):
+        self.lineno = lineno
+        self.var = var
+
+    def children(self):
+        nodelist = []
+        if self.var:
+            nodelist.append(self.var)
+        return tuple(nodelist)
+
+
+class Rvalue(Node):
+    attr_names = ()
+
+    def __init__(self, var, lineno=0):
+        self.lineno = lineno
+        self.var = var
+
+    def children(self):
+        nodelist = []
+        if self.var:
+            nodelist.append(self.var)
+        return tuple(nodelist)
+
+
+# ------------------------------------------------------------------------------
+class Operator(Node):
+    attr_names = ()
+
+    def __init__(self, left, right, lineno=0):
+        self.lineno = lineno
+        self.left = left
+        self.right = right
+
+    def children(self):
+        nodelist = []
+        if self.left:
+            nodelist.append(self.left)
+        if self.right:
+            nodelist.append(self.right)
+        return tuple(nodelist)
+
+    def __repr__(self):
+        ret = '(' + self.__class__.__name__
+        for c in self.children():
+            ret += ' ' + c.__repr__()
+        ret += ')'
+        return ret
+
+
+class UnaryOperator(Operator):
+    attr_names = ()
+
+    def __init__(self, right, lineno=0):
+        self.lineno = lineno
+        self.right = right
+
+    def children(self):
+        nodelist = []
+        if self.right:
+            nodelist.append(self.right)
+        return tuple(nodelist)
+
+
+# Level 1 (Highest Priority)
+class Uplus(UnaryOperator):
+    pass
+
+
+class Uminus(UnaryOperator):
+    pass
+
+
+class Ulnot(UnaryOperator):
+    pass
+
+
+class Unot(UnaryOperator):
+    pass
+
+
+class Uand(UnaryOperator):
+    pass
+
+
+class Unand(UnaryOperator):
+    pass
+
+
+class Uor(UnaryOperator):
+    pass
+
+
+class Unor(UnaryOperator):
+    pass
+
+
+class Uxor(UnaryOperator):
+    pass
+
+
+class Uxnor(UnaryOperator):
+    pass
+
+
+# Level 2
+class Power(Operator):
+    pass
+
+
+class Times(Operator):
+    pass
+
+
+class Divide(Operator):
+    pass
+
+
+class Mod(Operator):
+    pass
+
+
+# Level 3
+class Plus(Operator):
+    pass
+
+
+class Minus(Operator):
+    pass
+
+
+# Level 4
+class Sll(Operator):
+    pass
+
+
+class Srl(Operator):
+    pass
+
+
+class Sla(Operator):
+    pass
+
+
+class Sra(Operator):
+    pass
+
+
+# Level 5
+class LessThan(Operator):
+    pass
+
+
+class GreaterThan(Operator):
+    pass
+
+
+class LessEq(Operator):
+    pass
+
+
+class GreaterEq(Operator):
+    pass
+
+
+# Level 6
+class Eq(Operator):
+    pass
+
+
+class NotEq(Operator):
+    pass
+
+
+class Eql(Operator):
+    pass  # ===
+
+
+class NotEql(Operator):
+    pass  # !==
+
+
+# Level 7
+class And(Operator):
+    pass
+
+
+class Xor(Operator):
+    pass
+
+
+class Xnor(Operator):
+    pass
+
+
+# Level 8
+class Or(Operator):
+    pass
+
+
+# Level 9
+class Land(Operator):
+    pass
+
+
+# Level 10
+class Lor(Operator):
+    pass
+
+
+# Level 11
+class Cond(Operator):
+    attr_names = ()
+
+    def __init__(self, cond, true_value, false_value, lineno=0):
+        self.lineno = lineno
+        self.cond = cond
+        self.true_value = true_value
+        self.false_value = false_value
+
+    def children(self):
+        nodelist = []
+        if self.cond:
+            nodelist.append(self.cond)
+        if self.true_value:
+            nodelist.append(self.true_value)
+        if self.false_value:
+            nodelist.append(self.false_value)
+        return tuple(nodelist)
+
+
+class Assign(Node):
+    attr_names = ()
+
+    def __init__(self, left, right, ldelay=None, rdelay=None, lineno=0):
+        self.lineno = lineno
+        self.left = left
+        self.right = right
+        self.ldelay = ldelay
+        self.rdelay = rdelay
+
+    def children(self):
+        nodelist = []
+        if self.left:
+            nodelist.append(self.left)
+        if self.right:
+            nodelist.append(self.right)
+        if self.ldelay:
+            nodelist.append(self.ldelay)
+        if self.rdelay:
+            nodelist.append(self.rdelay)
+        return tuple(nodelist)
+
+
+class Always(Node):
+    attr_names = ()
+
+    def __init__(self, sens_list, statement, lineno=0):
+        self.lineno = lineno
+        self.sens_list = sens_list
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.sens_list:
+            nodelist.append(self.sens_list)
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class AlwaysFF(Always):
+    pass
+
+
+class AlwaysComb(Always):
+    pass
+
+
+class AlwaysLatch(Always):
+    pass
+
+
+class SensList(Node):
+    attr_names = ()
+
+    def __init__(self, list, lineno=0):
+        self.lineno = lineno
+        self.list = list
+
+    def children(self):
+        nodelist = []
+        if self.list:
+            nodelist.extend(self.list)
+        return tuple(nodelist)
+
+
+class Sens(Node):
+    attr_names = ('type',)
+
+    def __init__(self, sig, type='posedge', lineno=0):
+        self.lineno = lineno
+        self.sig = sig
+        self.type = type  # 'posedge', 'negedge', 'level', 'all' (*)
+
+    def children(self):
+        nodelist = []
+        if self.sig:
+            nodelist.append(self.sig)
+        return tuple(nodelist)
+
+
+class Substitution(Node):
+    attr_names = ()
+
+    def __init__(self, left, right, ldelay=None, rdelay=None, lineno=0):
+        self.lineno = lineno
+        self.left = left
+        self.right = right
+        self.ldelay = ldelay
+        self.rdelay = rdelay
+
+    def children(self):
+        nodelist = []
+        if self.left:
+            nodelist.append(self.left)
+        if self.right:
+            nodelist.append(self.right)
+        if self.ldelay:
+            nodelist.append(self.ldelay)
+        if self.rdelay:
+            nodelist.append(self.rdelay)
+        return tuple(nodelist)
+
+
+class BlockingSubstitution(Substitution):
+    pass
+
+
+class NonblockingSubstitution(Substitution):
+    pass
+
+
+class IfStatement(Node):
+    attr_names = ()
+
+    def __init__(self, cond, true_statement, false_statement, lineno=0):
+        self.lineno = lineno
+        self.cond = cond
+        self.true_statement = true_statement
+        self.false_statement = false_statement
+
+    def children(self):
+        nodelist = []
+        if self.cond:
+            nodelist.append(self.cond)
+        if self.true_statement:
+            nodelist.append(self.true_statement)
+        if self.false_statement:
+            nodelist.append(self.false_statement)
+        return tuple(nodelist)
+
+
+class ForStatement(Node):
+    attr_names = ()
+
+    def __init__(self, pre, cond, post, statement, lineno=0):
+        self.lineno = lineno
+        self.pre = pre
+        self.cond = cond
+        self.post = post
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.pre:
+            nodelist.append(self.pre)
+        if self.cond:
+            nodelist.append(self.cond)
+        if self.post:
+            nodelist.append(self.post)
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class WhileStatement(Node):
+    attr_names = ()
+
+    def __init__(self, cond, statement, lineno=0):
+        self.lineno = lineno
+        self.cond = cond
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.cond:
+            nodelist.append(self.cond)
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class CaseStatement(Node):
+    attr_names = ()
+
+    def __init__(self, comp, caselist, lineno=0):
+        self.lineno = lineno
+        self.comp = comp
+        self.caselist = caselist
+
+    def children(self):
+        nodelist = []
+        if self.comp:
+            nodelist.append(self.comp)
+        if self.caselist:
+            nodelist.extend(self.caselist)
+        return tuple(nodelist)
+
+
+class CasexStatement(CaseStatement):
+    pass
+
+
+class CasezStatement(CaseStatement):
+    pass
+
+
+class UniqueCaseStatement(CaseStatement):
+    pass
+
+
+class Case(Node):
+    attr_names = ()
+
+    def __init__(self, cond, statement, lineno=0):
+        self.lineno = lineno
+        self.cond = cond
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.cond:
+            nodelist.extend(self.cond)
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class Block(Node):
+    attr_names = ('scope',)
+
+    def __init__(self, statements, scope=None, lineno=0):
+        self.lineno = lineno
+        self.statements = statements
+        self.scope = scope
+
+    def children(self):
+        nodelist = []
+        if self.statements:
+            nodelist.extend(self.statements)
+        return tuple(nodelist)
+
+
+class Initial(Node):
+    attr_names = ()
+
+    def __init__(self, statement, lineno=0):
+        self.lineno = lineno
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class EventStatement(Node):
+    attr_names = ()
+
+    def __init__(self, senslist, lineno=0):
+        self.lineno = lineno
+        self.senslist = senslist
+
+    def children(self):
+        nodelist = []
+        if self.senslist:
+            nodelist.append(self.senslist)
+        return tuple(nodelist)
+
+
+class WaitStatement(Node):
+    attr_names = ()
+
+    def __init__(self, cond, statement, lineno=0):
+        self.lineno = lineno
+        self.cond = cond
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.cond:
+            nodelist.append(self.cond)
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class ForeverStatement(Node):
+    attr_names = ()
+
+    def __init__(self, statement, lineno=0):
+        self.lineno = lineno
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class DelayStatement(Node):
+    attr_names = ()
+
+    def __init__(self, delay, lineno=0):
+        self.lineno = lineno
+        self.delay = delay
+
+    def children(self):
+        nodelist = []
+        if self.delay:
+            nodelist.append(self.delay)
+        return tuple(nodelist)
+
+
+class InstanceList(Node):
+    attr_names = ('module',)
+
+    def __init__(self, module, parameterlist, instances, lineno=0):
+        self.lineno = lineno
+        self.module = module
+        self.parameterlist = parameterlist
+        self.instances = instances
+
+    def children(self):
+        nodelist = []
+        if self.parameterlist:
+            nodelist.extend(self.parameterlist)
+        if self.instances:
+            nodelist.extend(self.instances)
+        return tuple(nodelist)
+
+
+class Instance(Node):
+    attr_names = ('name', 'module')
+
+    def __init__(self, module, name, portlist, parameterlist, array=None, lineno=0):
+        self.lineno = lineno
+        self.module = module
+        self.name = name
+        self.portlist = portlist
+        self.parameterlist = parameterlist
+        self.array = array
+
+    def children(self):
+        nodelist = []
+        if self.array:
+            nodelist.append(self.array)
+        if self.parameterlist:
+            nodelist.extend(self.parameterlist)
+        if self.portlist:
+            nodelist.extend(self.portlist)
+        return tuple(nodelist)
+
+
+class ParamArg(Node):
+    attr_names = ('paramname',)
+
+    def __init__(self, paramname, argname, lineno=0):
+        self.lineno = lineno
+        self.paramname = paramname
+        self.argname = argname
+
+    def children(self):
+        nodelist = []
+        if self.argname:
+            nodelist.append(self.argname)
+        return tuple(nodelist)
+
+
+class PortArg(Node):
+    attr_names = ('portname',)
+
+    def __init__(self, portname, argname, lineno=0):
+        self.lineno = lineno
+        self.portname = portname
+        self.argname = argname
+
+    def children(self):
+        nodelist = []
+        if self.argname:
+            nodelist.append(self.argname)
+        return tuple(nodelist)
+
+
+class Function(Node):
+    attr_names = ('name',)
+
+    def __init__(self, name, retwidth, statement, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.retwidth = retwidth
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.retwidth:
+            nodelist.append(self.retwidth)
+        if self.statement:
+            nodelist.extend(self.statement)
+        return tuple(nodelist)
+
+    def __repr__(self):
+        return self.name.__repr__()
+
+
+class FunctionCall(Node):
+    attr_names = ()
+
+    def __init__(self, name, args, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.args = args
+
+    def children(self):
+        nodelist = []
+        if self.name:
+            nodelist.append(self.name)
+        if self.args:
+            nodelist.extend(self.args)
+        return tuple(nodelist)
+
+    def __repr__(self):
+        return self.name.__repr__()
+
+
+class Task(Node):
+    attr_names = ('name',)
+
+    def __init__(self, name, statement, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.statement:
+            nodelist.extend(self.statement)
+        return tuple(nodelist)
+
+
+class TaskCall(Node):
+    attr_names = ()
+
+    def __init__(self, name, args, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.args = args
+
+    def children(self):
+        nodelist = []
+        if self.name:
+            nodelist.append(self.name)
+        if self.args:
+            nodelist.extend(self.args)
+        return tuple(nodelist)
+
+
+class GenerateStatement(Node):
+    attr_names = ()
+
+    def __init__(self, items, lineno=0):
+        self.lineno = lineno
+        self.items = items
+
+    def children(self):
+        nodelist = []
+        if self.items:
+            nodelist.extend(self.items)
+        return tuple(nodelist)
+
+
+class SystemCall(Node):
+    attr_names = ('syscall',)
+
+    def __init__(self, syscall, args, lineno=0):
+        self.lineno = lineno
+        self.syscall = syscall
+        self.args = args
+
+    def children(self):
+        nodelist = []
+        if self.args:
+            nodelist.extend(self.args)
+        return tuple(nodelist)
+
+    def __repr__(self):
+        ret = []
+        ret.append('(')
+        ret.append('$')
+        ret.append(self.syscall)
+        for a in self.args:
+            ret.append(' ')
+            ret.append(str(a))
+        ret.append(')')
+        return ''.join(ret)
+
+
+class IdentifierScopeLabel(Node):
+    attr_names = ('name', 'loop')
+
+    def __init__(self, name, loop=None, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.loop = loop
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+
+class IdentifierScope(Node):
+    attr_names = ()
+
+    def __init__(self, labellist, lineno=0):
+        self.lineno = lineno
+        self.labellist = labellist
+
+    def children(self):
+        nodelist = []
+        if self.labellist:
+            nodelist.extend(self.labellist)
+        return tuple(nodelist)
+
+
+class Pragma(Node):
+    attr_names = ()
+
+    def __init__(self, entry, lineno=0):
+        self.lineno = lineno
+        self.entry = entry
+
+    def children(self):
+        nodelist = []
+        if self.entry:
+            nodelist.append(self.entry)
+        return tuple(nodelist)
+
+
+class PragmaEntry(Node):
+    attr_names = ('name', )
+
+    def __init__(self, name, value=None, lineno=0):
+        self.lineno = lineno
+        self.name = name
+        self.value = value
+
+    def children(self):
+        nodelist = []
+        if self.value:
+            nodelist.append(self.value)
+        return tuple(nodelist)
+
+
+class Disable(Node):
+    attr_names = ('dest',)
+
+    def __init__(self, dest, lineno=0):
+        self.lineno = lineno
+        self.dest = dest
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
+
+
+class ParallelBlock(Node):
+    attr_names = ('scope',)
+
+    def __init__(self, statements, scope=None, lineno=0):
+        self.lineno = lineno
+        self.statements = statements
+        self.scope = scope
+
+    def children(self):
+        nodelist = []
+        if self.statements:
+            nodelist.extend(self.statements)
+        return tuple(nodelist)
+
+
+class SingleStatement(Node):
+    attr_names = ()
+
+    def __init__(self, statement, lineno=0):
+        self.lineno = lineno
+        self.statement = statement
+
+    def children(self):
+        nodelist = []
+        if self.statement:
+            nodelist.append(self.statement)
+        return tuple(nodelist)
+
+
+class EmbeddedCode(Node):
+    attr_names = ('code',)
+
+    def __init__(self, code, lineno=0):
+        self.code = code
+
+    def children(self):
+        nodelist = []
+        return tuple(nodelist)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/lexer.py b/venv/lib/python3.9/site-packages/pyverilog/vparser/lexer.py
new file mode 100644
index 0000000..8fe6628
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/lexer.py
@@ -0,0 +1,297 @@
+"""
+   Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import re
+
+from ply.lex import *
+
+
+class VerilogLexer(object):
+    """ Verilog HDL Lexical Analayzer """
+
+    def __init__(self, error_func):
+        self.filename = ''
+        self.error_func = error_func
+        self.directives = []
+        self.default_nettype = 'wire'
+
+    def build(self, **kwargs):
+        self.lexer = lex(object=self, **kwargs)
+
+    def input(self, data):
+        self.lexer.input(data)
+
+    def reset_lineno(self):
+        self.lexer.lineno = 1
+
+    def get_directives(self):
+        return tuple(self.directives)
+
+    def get_default_nettype(self):
+        return self.default_nettype
+
+    def token(self):
+        return self.lexer.token()
+
+    keywords = (
+        'MODULE', 'ENDMODULE', 'BEGIN', 'END', 'GENERATE', 'ENDGENERATE', 'GENVAR',
+        'FUNCTION', 'ENDFUNCTION', 'TASK', 'ENDTASK',
+        'INPUT', 'INOUT', 'OUTPUT', 'TRI', 'REG', 'LOGIC', 'WIRE', 'INTEGER', 'REAL', 'SIGNED',
+        'PARAMETER', 'LOCALPARAM', 'SUPPLY0', 'SUPPLY1',
+        'ASSIGN', 'ALWAYS', 'ALWAYS_FF', 'ALWAYS_COMB', 'ALWAYS_LATCH', 'SENS_OR', 'POSEDGE', 'NEGEDGE', 'INITIAL',
+        'IF', 'ELSE', 'FOR', 'WHILE', 'CASE', 'CASEX', 'CASEZ', 'UNIQUE', 'ENDCASE', 'DEFAULT',
+        'WAIT', 'FOREVER', 'DISABLE', 'FORK', 'JOIN',
+    )
+
+    reserved = {}
+    for keyword in keywords:
+        if keyword == 'SENS_OR':
+            reserved['or'] = keyword
+        else:
+            reserved[keyword.lower()] = keyword
+
+    operators = (
+        'PLUS', 'MINUS', 'POWER', 'TIMES', 'DIVIDE', 'MOD',
+        'NOT', 'OR', 'NOR', 'AND', 'NAND', 'XOR', 'XNOR',
+        'LOR', 'LAND', 'LNOT',
+        'LSHIFTA', 'RSHIFTA', 'LSHIFT', 'RSHIFT',
+        'LT', 'GT', 'LE', 'GE', 'EQ', 'NE', 'EQL', 'NEL',
+        'COND',  # ?
+        'EQUALS',
+    )
+
+    tokens = keywords + operators + (
+        'ID',
+        'AT', 'COMMA', 'COLON', 'SEMICOLON', 'DOT',
+        'PLUSCOLON', 'MINUSCOLON',
+        'FLOATNUMBER', 'STRING_LITERAL',
+        'INTNUMBER_DEC', 'SIGNED_INTNUMBER_DEC',
+        'INTNUMBER_HEX', 'SIGNED_INTNUMBER_HEX',
+        'INTNUMBER_OCT', 'SIGNED_INTNUMBER_OCT',
+        'INTNUMBER_BIN', 'SIGNED_INTNUMBER_BIN',
+        'LPAREN', 'RPAREN', 'LBRACKET', 'RBRACKET', 'LBRACE', 'RBRACE',
+        'DELAY', 'DOLLER',
+    )
+
+    skipped = (
+        'COMMENTOUT', 'LINECOMMENT', 'DIRECTIVE',
+    )
+
+    # Ignore
+    t_ignore = ' \t'
+
+    # Directive
+    directive = r"""\`.*?\n"""
+
+    @TOKEN(directive)
+    def t_DIRECTIVE(self, t):
+        self.directives.append((self.lexer.lineno, t.value))
+        t.lexer.lineno += t.value.count("\n")
+        m = re.match("^`default_nettype\s+(.+)\n", t.value)
+        if m:
+            self.default_nettype = m.group(1)
+        pass
+
+    # Comment
+    linecomment = r"""//.*?\n"""
+    commentout = r"""/\*(.|\n)*?\*/"""
+
+    @TOKEN(linecomment)
+    def t_LINECOMMENT(self, t):
+        t.lexer.lineno += t.value.count("\n")
+        pass
+
+    @TOKEN(commentout)
+    def t_COMMENTOUT(self, t):
+        t.lexer.lineno += t.value.count("\n")
+        pass
+
+    # Operator
+    t_LOR = r'\|\|'
+    t_LAND = r'\&\&'
+
+    t_NOR = r'~\|'
+    t_NAND = r'~\&'
+    t_XNOR = r'~\^'
+    t_OR = r'\|'
+    t_AND = r'\&'
+    t_XOR = r'\^'
+    t_LNOT = r'!'
+    t_NOT = r'~'
+
+    t_LSHIFTA = r'<<<'
+    t_RSHIFTA = r'>>>'
+    t_LSHIFT = r'<<'
+    t_RSHIFT = r'>>'
+
+    t_EQL = r'==='
+    t_NEL = r'!=='
+    t_EQ = r'=='
+    t_NE = r'!='
+
+    t_LE = r'<='
+    t_GE = r'>='
+    t_LT = r'<'
+    t_GT = r'>'
+
+    t_POWER = r'\*\*'
+    t_PLUS = r'\+'
+    t_MINUS = r'-'
+    t_TIMES = r'\*'
+    t_DIVIDE = r'/'
+    t_MOD = r'%'
+
+    t_COND = r'\?'
+    t_EQUALS = r'='
+
+    t_PLUSCOLON = r'\+:'
+    t_MINUSCOLON = r'-:'
+
+    t_AT = r'@'
+    t_COMMA = r','
+    t_SEMICOLON = r';'
+    t_COLON = r':'
+    t_DOT = r'\.'
+
+    t_LPAREN = r'\('
+    t_RPAREN = r'\)'
+    t_LBRACKET = r'\['
+    t_RBRACKET = r'\]'
+    t_LBRACE = r'\{'
+    t_RBRACE = r'\}'
+
+    t_DELAY = r'\#'
+    t_DOLLER = r'\$'
+
+    bin_number = '[0-9]*\'[bB][0-1xXzZ?][0-1xXzZ?_]*'
+    signed_bin_number = '[0-9]*\'[sS][bB][0-1xZzZ?][0-1xXzZ?_]*'
+    octal_number = '[0-9]*\'[oO][0-7xXzZ?][0-7xXzZ?_]*'
+    signed_octal_number = '[0-9]*\'[sS][oO][0-7xXzZ?][0-7xXzZ?_]*'
+    hex_number = '[0-9]*\'[hH][0-9a-fA-FxXzZ?][0-9a-fA-FxXzZ?_]*'
+    signed_hex_number = '[0-9]*\'[sS][hH][0-9a-fA-FxXzZ?][0-9a-fA-FxXzZ?_]*'
+
+    decimal_number = '([0-9]*\'[dD][0-9xXzZ?][0-9xXzZ?_]*)|([0-9][0-9_]*)'
+    signed_decimal_number = '[0-9]*\'[sS][dD][0-9xXzZ?][0-9xXzZ?_]*'
+
+    exponent_part = r"""([eE][-+]?[0-9]+)"""
+    fractional_constant = r"""([0-9]*\.[0-9]+)|([0-9]+\.)"""
+    float_number = '((((' + fractional_constant + ')' + \
+        exponent_part + '?)|([0-9]+' + exponent_part + ')))'
+
+    simple_escape = r"""([a-zA-Z\\?'"])"""
+    octal_escape = r"""([0-7]{1,3})"""
+    hex_escape = r"""(x[0-9a-fA-F]+)"""
+    escape_sequence = r"""(\\(""" + simple_escape + '|' + octal_escape + '|' + hex_escape + '))'
+    string_char = r"""([^"\\\n]|""" + escape_sequence + ')'
+    string_literal = '"' + string_char + '*"'
+
+    identifier = r"""(([a-zA-Z_])([a-zA-Z_0-9$])*)|((\\\S)(\S)*)"""
+
+    @TOKEN(string_literal)
+    def t_STRING_LITERAL(self, t):
+        return t
+
+    @TOKEN(float_number)
+    def t_FLOATNUMBER(self, t):
+        return t
+
+    @TOKEN(signed_bin_number)
+    def t_SIGNED_INTNUMBER_BIN(self, t):
+        return t
+
+    @TOKEN(bin_number)
+    def t_INTNUMBER_BIN(self, t):
+        return t
+
+    @TOKEN(signed_octal_number)
+    def t_SIGNED_INTNUMBER_OCT(self, t):
+        return t
+
+    @TOKEN(octal_number)
+    def t_INTNUMBER_OCT(self, t):
+        return t
+
+    @TOKEN(signed_hex_number)
+    def t_SIGNED_INTNUMBER_HEX(self, t):
+        return t
+
+    @TOKEN(hex_number)
+    def t_INTNUMBER_HEX(self, t):
+        return t
+
+    @TOKEN(signed_decimal_number)
+    def t_SIGNED_INTNUMBER_DEC(self, t):
+        return t
+
+    @TOKEN(decimal_number)
+    def t_INTNUMBER_DEC(self, t):
+        return t
+
+    @TOKEN(identifier)
+    def t_ID(self, t):
+        t.type = self.reserved.get(t.value, 'ID')
+        return t
+
+    def t_NEWLINE(self, t):
+        r'\n+'
+        t.lexer.lineno += t.value.count("\n")
+        pass
+
+    def t_error(self, t):
+        msg = 'Illegal character %s' % repr(t.value[0])
+        self._error(msg, t)
+
+    def _error(self, msg, token):
+        location = self._make_tok_location(token)
+        self.error_func(msg, location[0], location[1])
+        self.lexer.skip(1)
+
+    def _find_tok_column(self, token):
+        i = token.lexpos
+        while i > 0:
+            if self.lexer.lexdata[i] == '\n':
+                break
+            i -= 1
+        return (token.lexpos - i) + 1
+
+    def _make_tok_location(self, token):
+        return (token.lineno, self._find_tok_column(token))
+
+
+def dump_tokens(text):
+    def my_error_func(msg, a, b):
+        sys.write(msg + "\n")
+        sys.exit()
+
+    lexer = VerilogLexer(error_func=my_error_func)
+    lexer.build()
+    lexer.input(text)
+
+    ret = []
+
+    # Tokenize
+    while True:
+        tok = lexer.token()
+        if not tok:
+            break  # No more input
+        ret.append("%s %s %d %s %d\n" %
+                   (tok.value, tok.type, tok.lineno, lexer.filename, tok.lexpos))
+
+    return ''.join(ret)
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/parser.py b/venv/lib/python3.9/site-packages/pyverilog/vparser/parser.py
new file mode 100644
index 0000000..3a82912
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/parser.py
@@ -0,0 +1,2340 @@
+"""
+   Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import pathlib
+from ply.yacc import yacc
+
+from pyverilog.vparser.preprocessor import VerilogPreprocessor
+from pyverilog.vparser.lexer import VerilogLexer
+from pyverilog.vparser.ast import *
+
+
+class VerilogParser(object):
+    'Verilog HDL Parser'
+
+    # Expression Precedence
+    # Reference: http://hp.vector.co.jp/authors/VA016670/verilog/index.html
+    precedence = (
+        # <- Weak
+        ('left', 'LOR'),
+        ('left', 'LAND'),
+        ('left', 'OR'),
+        ('left', 'XOR', 'XNOR'),
+        ('left', 'AND'),
+        ('left', 'EQ', 'NE', 'EQL', 'NEL'),
+        ('left', 'LT', 'GT', 'LE', 'GE'),
+        ('left', 'LSHIFT', 'RSHIFT', 'LSHIFTA', 'RSHIFTA'),
+        ('left', 'PLUS', 'MINUS'),
+        ('left', 'TIMES', 'DIVIDE', 'MOD'),
+        ('left', 'POWER'),
+        ('right', 'UMINUS', 'UPLUS', 'ULNOT', 'UNOT',
+         'UAND', 'UNAND', 'UOR', 'UNOR', 'UXOR', 'UXNOR'),
+        # -> Strong
+    )
+
+    def __init__(self, outputdir=".", debug=True):
+        self.lexer = VerilogLexer(error_func=self._lexer_error_func)
+        self.lexer.build()
+
+        self.tokens = self.lexer.tokens
+        pathlib.Path(outputdir).mkdir(parents=True, exist_ok=True)
+        self.parser = yacc(
+            module=self,
+            method="LALR",
+            outputdir=outputdir,
+            debug=debug
+        )
+
+    def _lexer_error_func(self, msg, line, column):
+        coord = self._coord(line, column)
+        raise ParseError('%s: %s' % (coord, msg))
+
+    def get_directives(self):
+        return self.lexer.get_directives()
+
+    def get_default_nettype(self):
+        return self.lexer.get_default_nettype()
+
+    # Returns AST
+    def parse(self, text, debug=0):
+        return self.parser.parse(text, lexer=self.lexer, debug=debug)
+
+    # --------------------------------------------------------------------------
+    # Parse Rule Definition
+    # --------------------------------------------------------------------------
+    def p_source_text(self, p):
+        'source_text : description'
+        p[0] = Source(name='', description=p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_description(self, p):
+        'description : definitions'
+        p[0] = Description(definitions=p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_definitions(self, p):
+        'definitions : definitions definition'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_definitions_one(self, p):
+        'definitions : definition'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_definition(self, p):
+        'definition : moduledef'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_definition_pragma(self, p):
+        'definition : pragma'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_pragma_assign(self, p):
+        'pragma : LPAREN TIMES ID EQUALS expression TIMES RPAREN'
+        p[0] = Pragma(PragmaEntry(p[3], p[5], lineno=p.lineno(1)),
+                      lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_pragma(self, p):
+        'pragma : LPAREN TIMES ID TIMES RPAREN'
+        p[0] = Pragma(PragmaEntry(p[3], lineno=p.lineno(1)),
+                      lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_moduledef(self, p):
+        'moduledef : MODULE modulename paramlist portlist items ENDMODULE'
+        p[0] = ModuleDef(name=p[2], paramlist=p[3], portlist=p[4], items=p[5],
+                         default_nettype=self.get_default_nettype(), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+        p[0].end_lineno = p.lineno(6)
+
+    def p_modulename(self, p):
+        'modulename : ID'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_modulename_or(self, p):
+        'modulename : SENS_OR'  # or primitive
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_paramlist(self, p):
+        'paramlist : DELAY LPAREN params RPAREN'
+        p[0] = Paramlist(params=p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_paramlist_empty(self, p):
+        'paramlist : empty'
+        p[0] = Paramlist(params=())
+
+    def p_params(self, p):
+        'params : params_begin param_end'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_params_begin(self, p):
+        'params_begin : params_begin param'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_params_begin_one(self, p):
+        'params_begin : param'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_params_one(self, p):
+        'params : param_end'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param(self, p):
+        'param : PARAMETER param_substitution_list COMMA'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(2))
+                     for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_signed(self, p):
+        'param : PARAMETER SIGNED param_substitution_list COMMA'
+        paramlist = [Parameter(rname, rvalue, signed=True, lineno=p.lineno(2))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_width(self, p):
+        'param : PARAMETER width param_substitution_list COMMA'
+        paramlist = [Parameter(rname, rvalue, p[2], lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_signed_width(self, p):
+        'param : PARAMETER SIGNED width param_substitution_list COMMA'
+        paramlist = [Parameter(rname, rvalue, p[3], signed=True, lineno=p.lineno(3))
+                     for rname, rvalue in p[4]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_integer(self, p):
+        'param : PARAMETER INTEGER param_substitution_list COMMA'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_end(self, p):
+        'param_end : PARAMETER param_substitution_list'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(2))
+                     for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_end_signed(self, p):
+        'param_end : PARAMETER SIGNED param_substitution_list'
+        paramlist = [Parameter(rname, rvalue, signed=True, lineno=p.lineno(2))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_end_width(self, p):
+        'param_end : PARAMETER width param_substitution_list'
+        paramlist = [Parameter(rname, rvalue, p[2], lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_end_signed_width(self, p):
+        'param_end : PARAMETER SIGNED width param_substitution_list'
+        paramlist = [Parameter(rname, rvalue, p[3], signed=True, lineno=p.lineno(3))
+                     for rname, rvalue in p[4]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_end_integer(self, p):
+        'param_end : PARAMETER INTEGER param_substitution_list'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_portlist(self, p):
+        'portlist : LPAREN ports RPAREN SEMICOLON'
+        p[0] = Portlist(ports=p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_portlist_io(self, p):
+        'portlist : LPAREN ioports RPAREN SEMICOLON'
+        p[0] = Portlist(ports=p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_portlist_paren_empty(self, p):
+        'portlist : LPAREN RPAREN SEMICOLON'
+        p[0] = Portlist(ports=(), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_portlist_empty(self, p):
+        'portlist : SEMICOLON'
+        p[0] = Portlist(ports=(), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ports(self, p):
+        'ports : ports COMMA portname'
+        port = Port(name=p[3], width=None, dimensions=None, type=None, lineno=p.lineno(1))
+        p[0] = p[1] + (port,)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ports_one(self, p):
+        'ports : portname'
+        port = Port(name=p[1], width=None, dimensions=None, type=None, lineno=p.lineno(1))
+        p[0] = (port,)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_portname(self, p):
+        'portname : ID'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtypes(self, p):
+        'sigtypes : sigtypes sigtype'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtypes_one(self, p):
+        'sigtypes : sigtype'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_input(self, p):
+        'sigtype : INPUT'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_output(self, p):
+        'sigtype : OUTPUT'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_inout(self, p):
+        'sigtype : INOUT'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_tri(self, p):
+        'sigtype : TRI'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_reg(self, p):
+        'sigtype : REG'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_logic(self, p):
+        'sigtype : LOGIC'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_wire(self, p):
+        'sigtype : WIRE'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_signed(self, p):
+        'sigtype : SIGNED'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_supply0(self, p):
+        'sigtype : SUPPLY0'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sigtype_supply1(self, p):
+        'sigtype : SUPPLY1'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioports(self, p):
+        'ioports : ioports COMMA ioport'
+        if isinstance(p[3], str):
+            t = None
+            for r in reversed(p[1]):
+                if isinstance(r.first, Input):
+                    t = Ioport(Input(name=p[3], width=r.first.width, lineno=p.lineno(3)),
+                               lineno=p.lineno(3))
+                    break
+                if isinstance(r.first, Output) and r.second is None:
+                    t = Ioport(Output(name=p[3], width=r.first.width, lineno=p.lineno(3)),
+                               lineno=p.lineno(3))
+                    break
+                if isinstance(r.first, Output) and isinstance(r.second, Reg):
+                    t = Ioport(Output(name=p[3], width=r.first.width, lineno=p.lineno(3)),
+                               Reg(name=p[3], width=r.first.width,
+                                   lineno=p.lineno(3)),
+                               lineno=p.lineno(3))
+                    break
+                if isinstance(r.first, Inout):
+                    t = Ioport(Inout(name=p[3], width=r.first.width, lineno=p.lineno(3)),
+                               lineno=p.lineno(3))
+                    break
+            p[0] = p[1] + (t,)
+        else:
+            p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioports_one(self, p):
+        'ioports : ioport_head'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def create_ioport(self, sigtypes, name, width=None, dimensions=None, lineno=0):
+        self.typecheck_ioport(sigtypes)
+        first = None
+        second = None
+        signed = False
+        if 'signed' in sigtypes:
+            signed = True
+        if 'input' in sigtypes:
+            first = Input(name=name, width=width, signed=signed,
+                          dimensions=dimensions, lineno=lineno)
+        if 'output' in sigtypes:
+            first = Output(name=name, width=width, signed=signed,
+                           dimensions=dimensions, lineno=lineno)
+        if 'inout' in sigtypes:
+            first = Inout(name=name, width=width, signed=signed,
+                          dimensions=dimensions, lineno=lineno)
+        if 'wire' in sigtypes:
+            second = Wire(name=name, width=width, signed=signed,
+                          dimensions=dimensions, lineno=lineno)
+        if 'reg' in sigtypes:
+            second = Reg(name=name, width=width, signed=signed,
+                         dimensions=dimensions, lineno=lineno)
+        if 'tri' in sigtypes:
+            second = Tri(name=name, width=width, signed=signed,
+                         dimensions=dimensions, lineno=lineno)
+        return Ioport(first, second, lineno=lineno)
+
+    def typecheck_ioport(self, sigtypes):
+        if 'input' not in sigtypes and 'output' not in sigtypes and 'inout' not in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'input' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'tri' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'output' in sigtypes and 'tri' in sigtypes:
+            raise ParseError("Syntax Error")
+
+    def p_ioport(self, p):
+        'ioport : sigtypes portname'
+        p[0] = self.create_ioport(p[1], p[2], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_width(self, p):
+        'ioport : sigtypes width portname'
+        p[0] = self.create_ioport(p[1], p[3], width=p[2], lineno=p.lineno(3))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_dimensions(self, p):
+        'ioport : sigtypes width portname dimensions'
+        p[0] = self.create_ioport(p[1], p[3], width=p[2], dimensions=p[4], lineno=p.lineno(3))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_head(self, p):
+        'ioport_head : sigtypes portname'
+        p[0] = self.create_ioport(p[1], p[2], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_head_width(self, p):
+        'ioport_head : sigtypes width portname'
+        p[0] = self.create_ioport(p[1], p[3], width=p[2], lineno=p.lineno(3))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_head_dimensions(self, p):
+        'ioport_head : sigtypes width portname dimensions'
+        p[0] = self.create_ioport(p[1], p[3], width=p[2], dimensions=p[4], lineno=p.lineno(3))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ioport_portname(self, p):
+        'ioport : portname'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_width(self, p):
+        'width : LBRACKET expression COLON expression RBRACKET'
+        p[0] = Width(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_length(self, p):
+        'length : LBRACKET expression COLON expression RBRACKET'
+        p[0] = Length(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_dimensions(self, p):
+        'dimensions : dimensions length'
+        dims = p[1].lengths + [p[2]]
+        p[0] = Dimensions(dims, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_dimensions_one(self, p):
+        'dimensions : length'
+        dims = [p[1]]
+        p[0] = Dimensions(dims, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_items(self, p):
+        'items : items item'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_items_one(self, p):
+        'items : item'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_items_empty(self, p):
+        'items : empty'
+        p[0] = ()
+
+    def p_item(self, p):
+        """item : standard_item
+        | generate
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_standard_item(self, p):
+        """standard_item : decl
+        | integerdecl
+        | realdecl
+        | declassign
+        | parameterdecl
+        | localparamdecl
+        | genvardecl
+        | assignment
+        | always
+        | always_ff
+        | always_comb
+        | always_latch
+        | initial
+        | instance
+        | function
+        | task
+        | pragma
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # Signal Decl
+    def create_decl(self, sigtypes, name, width=None, dimensions=None, lineno=0):
+        self.typecheck_decl(sigtypes, dimensions)
+        decls = []
+        signed = False
+        if 'signed' in sigtypes:
+            signed = True
+        if 'input' in sigtypes:
+            decls.append(Input(name=name, width=width,
+                               signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'output' in sigtypes:
+            decls.append(Output(name=name, width=width,
+                                signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'inout' in sigtypes:
+            decls.append(Inout(name=name, width=width,
+                               signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'wire' in sigtypes:
+            decls.append(Wire(name=name, width=width,
+                              signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'reg' in sigtypes:
+            decls.append(Reg(name=name, width=width,
+                             signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'tri' in sigtypes:
+            decls.append(Tri(name=name, width=width,
+                             signed=signed, lineno=lineno, dimensions=dimensions))
+        if 'supply0' in sigtypes:
+            decls.append(Supply(name=name, value=IntConst('0', lineno=lineno),
+                                width=width, signed=signed, lineno=lineno))
+        if 'supply1' in sigtypes:
+            decls.append(Supply(name=name, value=IntConst('1', lineno=lineno),
+                                width=width, signed=signed, lineno=lineno))
+        return decls
+
+    def typecheck_decl(self, sigtypes, dimensions=None):
+        if ('supply0' in sigtypes or 'supply1' in sigtypes) and \
+           dimensions is not None:
+            raise ParseError("SyntaxError")
+        if len(sigtypes) == 1 and 'signed' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'input' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'tri' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'output' in sigtypes and 'tri' in sigtypes:
+            raise ParseError("Syntax Error")
+
+    def p_decl(self, p):
+        'decl : sigtypes declnamelist SEMICOLON'
+        decllist = []
+        for rname, rdimensions in p[2]:
+            decllist.extend(self.create_decl(p[1], rname, dimensions=rdimensions,
+                                             lineno=p.lineno(2)))
+        p[0] = Decl(tuple(decllist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_decl_width(self, p):
+        'decl : sigtypes width declnamelist SEMICOLON'
+        decllist = []
+        for rname, rdimensions in p[3]:
+            decllist.extend(self.create_decl(p[1], rname, width=p[2], dimensions=rdimensions,
+                                             lineno=p.lineno(3)))
+        p[0] = Decl(tuple(decllist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declnamelist(self, p):
+        'declnamelist : declnamelist COMMA declname'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declnamelist_one(self, p):
+        'declnamelist : declname'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declname(self, p):
+        'declname : ID'
+        p[0] = (p[1], None)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declarray(self, p):
+        'declname : ID dimensions'
+        p[0] = (p[1], p[2])
+        p.set_lineno(0, p.lineno(1))
+
+    # Decl and Assign
+    def create_declassign(self, sigtypes, name, assign, width=None, lineno=0):
+        self.typecheck_declassign(sigtypes)
+        decls = []
+        signed = False
+        if 'signed' in sigtypes:
+            signed = True
+        if 'input' in sigtypes:
+            decls.append(Input(name=name, width=width,
+                               signed=signed, lineno=lineno))
+        if 'output' in sigtypes:
+            decls.append(Output(name=name, width=width,
+                                signed=signed, lineno=lineno))
+        if 'inout' in sigtypes:
+            decls.append(Inout(name=name, width=width,
+                               signed=signed, lineno=lineno))
+        if 'wire' in sigtypes:
+            decls.append(Wire(name=name, width=width,
+                              signed=signed, lineno=lineno))
+        if 'reg' in sigtypes:
+            decls.append(Reg(name=name, width=width,
+                             signed=signed, lineno=lineno))
+        decls.append(assign)
+        return decls
+
+    def typecheck_declassign(self, sigtypes):
+        if len(sigtypes) == 1 and 'signed' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'reg' not in sigtypes and 'wire' not in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'output' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'input' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'input' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'inout' in sigtypes and 'reg' in sigtypes:
+            raise ParseError("Syntax Error")
+        if 'supply0' in sigtypes and len(sigtypes) != 1:
+            raise ParseError("Syntax Error")
+        if 'supply1' in sigtypes and len(sigtypes) != 1:
+            raise ParseError("Syntax Error")
+
+    def p_declassign(self, p):
+        'declassign : sigtypes declassign_element SEMICOLON'
+        decllist = self.create_declassign(
+            p[1], p[2][0], p[2][1], lineno=p.lineno(2))
+        p[0] = Decl(decllist, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declassign_width(self, p):
+        'declassign : sigtypes width declassign_element SEMICOLON'
+        decllist = self.create_declassign(
+            p[1], p[3][0], p[3][1], width=p[2], lineno=p.lineno(3))
+        p[0] = Decl(tuple(decllist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declassign_element(self, p):
+        'declassign_element : ID EQUALS rvalue'
+        assign = Assign(Lvalue(Identifier(p[1], lineno=p.lineno(1)), lineno=p.lineno(1)),
+                        p[3], lineno=p.lineno(1))
+        p[0] = (p[1], assign)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_declassign_element_delay(self, p):
+        'declassign_element : delays ID EQUALS delays rvalue'
+        assign = Assign(Lvalue(Identifier(p[2], lineno=p.lineno(1)), lineno=p.lineno(2)),
+                        p[5], p[1], p[4], lineno=p.lineno(2))
+        p[0] = (p[1], assign)
+        p.set_lineno(0, p.lineno(2))
+
+    # Integer
+    def p_integerdecl(self, p):
+        'integerdecl : INTEGER integernamelist SEMICOLON'
+        intlist = [Integer(rname,
+                           Width(msb=IntConst('31', lineno=p.lineno(2)),
+                                 lsb=IntConst('0', lineno=p.lineno(2)),
+                                 lineno=p.lineno(2)),
+                           signed=True,
+                           value=rvalue,
+                           lineno=p.lineno(2)) for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(intlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_integerdecl_signed(self, p):
+        'integerdecl : INTEGER SIGNED integernamelist SEMICOLON'
+        intlist = [Integer(rname,
+                           Width(msb=IntConst('31', lineno=p.lineno(3)),
+                                 lsb=IntConst('0', lineno=p.lineno(3)),
+                                 lineno=p.lineno(3)),
+                           signed=True,
+                           value=rvalue,
+                           lineno=p.lineno(3)) for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(intlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_integernamelist(self, p):
+        'integernamelist : integernamelist COMMA integername'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_integernamelist_one(self, p):
+        'integernamelist : integername'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_integername_init(self, p):
+        'integername : ID EQUALS rvalue'
+        p[0] = (p[1], p[3])
+        p.set_lineno(0, p.lineno(1))
+
+    def p_integername(self, p):
+        'integername : ID'
+        p[0] = (p[1], None)
+        p.set_lineno(0, p.lineno(1))
+
+    # Real
+    def p_realdecl(self, p):
+        'realdecl : REAL realnamelist SEMICOLON'
+        reallist = [Real(p[1],
+                         Width(msb=IntConst('31', lineno=p.lineno(2)),
+                               lsb=IntConst('0', lineno=p.lineno(2)),
+                               lineno=p.lineno(2)),
+                         lineno=p.lineno(2)) for r in p[2]]
+        p[0] = Decl(tuple(reallist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_realnamelist(self, p):
+        'realnamelist : realnamelist COMMA realname'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_realnamelist_one(self, p):
+        'realnamelist : realname'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_realname(self, p):
+        'realname : ID'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # Parameter
+    def p_parameterdecl(self, p):
+        'parameterdecl : PARAMETER param_substitution_list SEMICOLON'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(2))
+                     for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterdecl_signed(self, p):
+        'parameterdecl : PARAMETER SIGNED param_substitution_list SEMICOLON'
+        paramlist = [Parameter(rname, rvalue, signed=True, lineno=p.lineno(2))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterdecl_width(self, p):
+        'parameterdecl : PARAMETER width param_substitution_list SEMICOLON'
+        paramlist = [Parameter(rname, rvalue, p[2], lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterdecl_signed_width(self, p):
+        'parameterdecl : PARAMETER SIGNED width param_substitution_list SEMICOLON'
+        paramlist = [Parameter(rname, rvalue, p[3], signed=True, lineno=p.lineno(3))
+                     for rname, rvalue in p[4]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterdecl_integer(self, p):
+        'parameterdecl : PARAMETER INTEGER param_substitution_list SEMICOLON'
+        paramlist = [Parameter(rname, rvalue, lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_localparamdecl(self, p):
+        'localparamdecl : LOCALPARAM param_substitution_list SEMICOLON'
+        paramlist = [Localparam(rname, rvalue, lineno=p.lineno(2))
+                     for rname, rvalue in p[2]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_localparamdecl_signed(self, p):
+        'localparamdecl : LOCALPARAM SIGNED param_substitution_list SEMICOLON'
+        paramlist = [Localparam(rname, rvalue, signed=True, lineno=p.lineno(2))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_localparamdecl_width(self, p):
+        'localparamdecl : LOCALPARAM width param_substitution_list SEMICOLON'
+        paramlist = [Localparam(rname, rvalue, p[2], lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_localparamdecl_signed_width(self, p):
+        'localparamdecl : LOCALPARAM SIGNED width param_substitution_list SEMICOLON'
+        paramlist = [Localparam(rname, rvalue, p[3], signed=True, lineno=p.lineno(3))
+                     for rname, rvalue in p[4]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_localparamdecl_integer(self, p):
+        'localparamdecl : LOCALPARAM INTEGER param_substitution_list SEMICOLON'
+        paramlist = [Localparam(rname, rvalue, lineno=p.lineno(3))
+                     for rname, rvalue in p[3]]
+        p[0] = Decl(tuple(paramlist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_substitution_list(self, p):
+        'param_substitution_list : param_substitution_list COMMA param_substitution'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_substitution_list_one(self, p):
+        'param_substitution_list : param_substitution'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_substitution(self, p):
+        'param_substitution : ID EQUALS rvalue'
+        p[0] = (p[1], p[3])
+        p.set_lineno(0, p.lineno(1))
+
+    def p_assignment(self, p):
+        'assignment : ASSIGN lvalue EQUALS rvalue SEMICOLON'
+        p[0] = Assign(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_assignment_delay(self, p):
+        'assignment : ASSIGN delays lvalue EQUALS delays rvalue SEMICOLON'
+        p[0] = Assign(p[3], p[6], p[2], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_lpartselect_lpointer(self, p):
+        'lpartselect : pointer LBRACKET expression COLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpartselect_lpointer_plus(self, p):
+        'lpartselect : pointer LBRACKET expression PLUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Plus(p[3], p[5]), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpartselect_lpointer_minus(self, p):
+        'lpartselect : pointer LBRACKET expression MINUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Minus(p[3], p[5]), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpartselect(self, p):
+        'lpartselect : identifier LBRACKET expression COLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpartselect_plus(self, p):
+        'lpartselect : identifier LBRACKET expression PLUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Plus(p[3], p[5]), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpartselect_minus(self, p):
+        'lpartselect : identifier LBRACKET expression MINUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Minus(p[3], p[5]), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lpointer(self, p):
+        'lpointer : pointer'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcat(self, p):
+        'lconcat : LBRACE lconcatlist RBRACE'
+        p[0] = LConcat(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcatlist(self, p):
+        'lconcatlist : lconcatlist COMMA lconcat_one'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcatlist_one(self, p):
+        'lconcatlist : lconcat_one'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcat_one_identifier(self, p):
+        'lconcat_one : identifier'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcat_one_lpartselect(self, p):
+        'lconcat_one : lpartselect'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcat_one_lpointer(self, p):
+        'lconcat_one : lpointer'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lconcat_one_lconcat(self, p):
+        'lconcat_one : lconcat'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lvalue_partselect(self, p):
+        'lvalue : lpartselect'
+        p[0] = Lvalue(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lvalue_pointer(self, p):
+        'lvalue : lpointer'
+        p[0] = Lvalue(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lvalue_concat(self, p):
+        'lvalue : lconcat'
+        p[0] = Lvalue(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_lvalue_one(self, p):
+        'lvalue : identifier'
+        p[0] = Lvalue(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_rvalue(self, p):
+        'rvalue : expression'
+        p[0] = Rvalue(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 1 (Highest Priority)
+    def p_expression_uminus(self, p):
+        'expression : MINUS expression %prec UMINUS'
+        p[0] = Uminus(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_uplus(self, p):
+        'expression : PLUS expression %prec UPLUS'
+        p[0] = p[2]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_ulnot(self, p):
+        'expression : LNOT expression %prec ULNOT'
+        p[0] = Ulnot(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_unot(self, p):
+        'expression : NOT expression %prec UNOT'
+        p[0] = Unot(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_uand(self, p):
+        'expression : AND expression %prec UAND'
+        p[0] = Uand(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_unand(self, p):
+        'expression : NAND expression %prec UNAND'
+        p[0] = Unand(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_unor(self, p):
+        'expression : NOR expression %prec UNOR'
+        p[0] = Unor(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_uor(self, p):
+        'expression : OR expression %prec UOR'
+        p[0] = Uor(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_uxor(self, p):
+        'expression : XOR expression %prec UXOR'
+        p[0] = Uxor(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_uxnor(self, p):
+        'expression : XNOR expression %prec UXNOR'
+        p[0] = Uxnor(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 2
+    def p_expression_power(self, p):
+        'expression : expression POWER expression'
+        p[0] = Power(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 3
+    def p_expression_times(self, p):
+        'expression : expression TIMES expression'
+        p[0] = Times(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_div(self, p):
+        'expression : expression DIVIDE expression'
+        p[0] = Divide(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_mod(self, p):
+        'expression : expression MOD expression'
+        p[0] = Mod(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 4
+    def p_expression_plus(self, p):
+        'expression : expression PLUS expression'
+        p[0] = Plus(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_minus(self, p):
+        'expression : expression MINUS expression'
+        p[0] = Minus(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 5
+    def p_expression_sll(self, p):
+        'expression : expression LSHIFT expression'
+        p[0] = Sll(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_srl(self, p):
+        'expression : expression RSHIFT expression'
+        p[0] = Srl(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_sla(self, p):
+        'expression : expression LSHIFTA expression'
+        p[0] = Sla(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_sra(self, p):
+        'expression : expression RSHIFTA expression'
+        p[0] = Sra(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 6
+    def p_expression_lessthan(self, p):
+        'expression : expression LT expression'
+        p[0] = LessThan(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_greaterthan(self, p):
+        'expression : expression GT expression'
+        p[0] = GreaterThan(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_lesseq(self, p):
+        'expression : expression LE expression'
+        p[0] = LessEq(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_greatereq(self, p):
+        'expression : expression GE expression'
+        p[0] = GreaterEq(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 7
+    def p_expression_eq(self, p):
+        'expression : expression EQ expression'
+        p[0] = Eq(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_noteq(self, p):
+        'expression : expression NE expression'
+        p[0] = NotEq(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_eql(self, p):
+        'expression : expression EQL expression'
+        p[0] = Eql(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_noteql(self, p):
+        'expression : expression NEL expression'
+        p[0] = NotEql(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 8
+    def p_expression_And(self, p):
+        'expression : expression AND expression'
+        p[0] = And(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_Xor(self, p):
+        'expression : expression XOR expression'
+        p[0] = Xor(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_Xnor(self, p):
+        'expression : expression XNOR expression'
+        p[0] = Xnor(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 9
+    def p_expression_Or(self, p):
+        'expression : expression OR expression'
+        p[0] = Or(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 10
+    def p_expression_land(self, p):
+        'expression : expression LAND expression'
+        p[0] = Land(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 11
+    def p_expression_lor(self, p):
+        'expression : expression LOR expression'
+        p[0] = Lor(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Level 12
+    def p_expression_cond(self, p):
+        'expression : expression COND expression COLON expression'
+        p[0] = Cond(p[1], p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_expression_expr(self, p):
+        'expression : LPAREN expression RPAREN'
+        p[0] = p[2]
+        p.set_lineno(0, p.lineno(2))
+
+    # --------------------------------------------------------------------------
+    def p_expression_concat(self, p):
+        'expression : concat'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_repeat(self, p):
+        'expression : repeat'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_partselect(self, p):
+        'expression : partselect'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_pointer(self, p):
+        'expression : pointer'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_functioncall(self, p):
+        'expression : functioncall'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_systemcall(self, p):
+        'expression : systemcall'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_id(self, p):
+        'expression : identifier'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_expression_const(self, p):
+        'expression : const_expression'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_concat(self, p):
+        'concat : LBRACE concatlist RBRACE'
+        p[0] = Concat(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_concatlist(self, p):
+        'concatlist : concatlist COMMA expression'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_concatlist_one(self, p):
+        'concatlist : expression'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_repeat(self, p):
+        'repeat : LBRACE expression concat RBRACE'
+        p[0] = Repeat(p[3], p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect(self, p):
+        'partselect : identifier LBRACKET expression COLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect_plus(self, p):
+        'partselect : identifier LBRACKET expression PLUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Plus(
+            p[3], p[5], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect_minus(self, p):
+        'partselect : identifier LBRACKET expression MINUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Minus(
+            p[3], p[5], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect_pointer(self, p):
+        'partselect : pointer LBRACKET expression COLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect_pointer_plus(self, p):
+        'partselect : pointer LBRACKET expression PLUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Plus(
+            p[3], p[5], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_partselect_pointer_minus(self, p):
+        'partselect : pointer LBRACKET expression MINUSCOLON expression RBRACKET'
+        p[0] = Partselect(p[1], p[3], Minus(
+            p[3], p[5], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_pointer(self, p):
+        'pointer : identifier LBRACKET expression RBRACKET'
+        p[0] = Pointer(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_pointer_pointer(self, p):
+        'pointer : pointer LBRACKET expression RBRACKET'
+        p[0] = Pointer(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_const_expression_intnum(self, p):
+        'const_expression : intnumber'
+        p[0] = IntConst(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_const_expression_floatnum(self, p):
+        'const_expression : floatnumber'
+        p[0] = FloatConst(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_const_expression_stringliteral(self, p):
+        'const_expression : stringliteral'
+        p[0] = StringConst(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_floatnumber(self, p):
+        'floatnumber : FLOATNUMBER'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_intnumber(self, p):
+        """intnumber : INTNUMBER_DEC
+        | SIGNED_INTNUMBER_DEC
+        | INTNUMBER_BIN
+        | SIGNED_INTNUMBER_BIN
+        | INTNUMBER_OCT
+        | SIGNED_INTNUMBER_OCT
+        | INTNUMBER_HEX
+        | SIGNED_INTNUMBER_HEX
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # String Literal
+    def p_stringliteral(self, p):
+        'stringliteral : STRING_LITERAL'
+        p[0] = p[1][1:-1]  # strip \" and \"
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    # Always
+    def p_always(self, p):
+        'always : ALWAYS senslist always_statement'
+        p[0] = Always(p[2], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_always_ff(self, p):
+        'always_ff : ALWAYS_FF senslist always_statement'
+        p[0] = AlwaysFF(p[2], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_always_comb(self, p):
+        'always_comb : ALWAYS_COMB senslist always_statement'
+        p[0] = AlwaysComb(p[2], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_always_latch(self, p):
+        'always_latch : ALWAYS_LATCH senslist always_statement'
+        p[0] = AlwaysLatch(p[2], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_egde_paren(self, p):
+        'senslist : AT LPAREN edgesigs RPAREN'
+        p[0] = SensList(p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_posedgesig(self, p):
+        'edgesig : POSEDGE edgesig_base'
+        p[0] = Sens(p[2], 'posedge', lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_negedgesig(self, p):
+        'edgesig : NEGEDGE edgesig_base'
+        p[0] = Sens(p[2], 'negedge', lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_edgesig_base_identifier(self, p):
+        'edgesig_base : identifier'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_edgesig_base_pointer(self, p):
+        'edgesig_base : pointer'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_edgesigs(self, p):
+        'edgesigs : edgesigs SENS_OR edgesig'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_edgesigs_comma(self, p):
+        'edgesigs : edgesigs COMMA edgesig'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_edgesigs_one(self, p):
+        'edgesigs : edgesig'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_empty(self, p):
+        'senslist : empty'
+        p[0] = SensList(
+            (Sens(None, 'all', lineno=p.lineno(1)),), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_level(self, p):
+        'senslist : AT levelsig'
+        p[0] = SensList((p[2],), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_level_paren(self, p):
+        'senslist : AT LPAREN levelsigs RPAREN'
+        p[0] = SensList(p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsig(self, p):
+        'levelsig : levelsig_base'
+        p[0] = Sens(p[1], 'level', lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsig_base_identifier(self, p):
+        'levelsig_base : identifier'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsig_base_pointer(self, p):
+        'levelsig_base : pointer'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsig_base_partselect(self, p):
+        'levelsig_base : partselect'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsigs(self, p):
+        'levelsigs : levelsigs SENS_OR levelsig'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsigs_comma(self, p):
+        'levelsigs : levelsigs COMMA levelsig'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_levelsigs_one(self, p):
+        'levelsigs : levelsig'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_all(self, p):
+        'senslist : AT TIMES'
+        p[0] = SensList(
+            (Sens(None, 'all', lineno=p.lineno(1)),), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sens_all_paren(self, p):
+        'senslist : AT LPAREN TIMES RPAREN'
+        p[0] = SensList(
+            (Sens(None, 'all', lineno=p.lineno(1)),), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_basic_statement(self, p):
+        """basic_statement : if_statement
+        | case_statement
+        | casex_statement
+        | casez_statement
+        | unique_case_statement
+        | for_statement
+        | while_statement
+        | event_statement
+        | wait_statement
+        | forever_statement
+        | block
+        | namedblock
+        | parallelblock
+        | blocking_substitution
+        | nonblocking_substitution
+        | single_statement
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_always_statement(self, p):
+        'always_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_blocking_substitution(self, p):
+        'blocking_substitution : delays lvalue EQUALS delays rvalue SEMICOLON'
+        p[0] = BlockingSubstitution(p[2], p[5], p[1], p[4], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(2))
+
+    def p_blocking_substitution_base(self, p):
+        'blocking_substitution_base : delays lvalue EQUALS delays rvalue'
+        p[0] = BlockingSubstitution(p[2], p[5], p[1], p[4], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(2))
+
+    def p_nonblocking_substitution(self, p):
+        'nonblocking_substitution : delays lvalue LE delays rvalue SEMICOLON'
+        p[0] = NonblockingSubstitution(
+            p[2], p[5], p[1], p[4], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(2))
+
+    # --------------------------------------------------------------------------
+    def p_delays(self, p):
+        'delays : DELAY LPAREN expression RPAREN'
+        p[0] = DelayStatement(p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_delays_identifier(self, p):
+        'delays : DELAY identifier'
+        p[0] = DelayStatement(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_delays_intnumber(self, p):
+        'delays : DELAY intnumber'
+        p[0] = DelayStatement(
+            IntConst(p[2], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_delays_floatnumber(self, p):
+        'delays : DELAY floatnumber'
+        p[0] = DelayStatement(FloatConst(
+            p[2], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_delays_empty(self, p):
+        'delays : empty'
+        p[0] = None
+
+    # --------------------------------------------------------------------------
+    def p_block(self, p):
+        'block : BEGIN block_statements END'
+        p[0] = Block(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_block_empty(self, p):
+        'block : BEGIN END'
+        p[0] = Block((), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_block_statements(self, p):
+        'block_statements : block_statements block_statement'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_block_statements_one(self, p):
+        'block_statements : block_statement'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_block_statement(self, p):
+        'block_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_namedblock(self, p):
+        'namedblock : BEGIN COLON ID namedblock_statements END'
+        p[0] = Block(p[4], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_namedblock_empty(self, p):
+        'namedblock : BEGIN COLON ID END'
+        p[0] = Block((), p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_namedblock_statements(self, p):
+        'namedblock_statements : namedblock_statements namedblock_statement'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_namedblock_statements_one(self, p):
+        'namedblock_statements : namedblock_statement'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_namedblock_statement(self, p):
+        """namedblock_statement : basic_statement
+        | decl
+        | integerdecl
+        | realdecl
+        | parameterdecl
+        | localparamdecl
+        """
+        if isinstance(p[1], Decl):
+            for r in p[1].list:
+                if (not isinstance(r, Reg) and not isinstance(r, Wire) and
+                    not isinstance(r, Integer) and not isinstance(r, Real) and
+                        not isinstance(r, Parameter) and not isinstance(r, Localparam)):
+                    raise ParseError("Syntax Error")
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_parallelblock(self, p):
+        'parallelblock : FORK block_statements JOIN'
+        p[0] = ParallelBlock(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parallelblock_empty(self, p):
+        'parallelblock : FORK JOIN'
+        p[0] = ParallelBlock((), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_if_statement(self, p):
+        'if_statement : IF LPAREN cond RPAREN true_statement ELSE else_statement'
+        p[0] = IfStatement(p[3], p[5], p[7], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_if_statement_woelse(self, p):
+        'if_statement : IF LPAREN cond RPAREN true_statement'
+        p[0] = IfStatement(p[3], p[5], None, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_if_statement_delay(self, p):
+        'if_statement : delays IF LPAREN cond RPAREN true_statement ELSE else_statement'
+        p[0] = IfStatement(p[4], p[6], p[8], lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(2))
+
+    def p_if_statement_woelse_delay(self, p):
+        'if_statement : delays IF LPAREN cond RPAREN true_statement'
+        p[0] = IfStatement(p[4], p[6], None, lineno=p.lineno(2))
+        p.set_lineno(0, p.lineno(2))
+
+    def p_cond(self, p):
+        'cond : expression'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_ifcontent_statement(self, p):
+        'ifcontent_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_true_statement(self, p):
+        'true_statement : ifcontent_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_else_statement(self, p):
+        'else_statement : ifcontent_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_for_statement(self, p):
+        'for_statement : FOR LPAREN forpre forcond forpost RPAREN forcontent_statement'
+        p[0] = ForStatement(p[3], p[4], p[5], p[7], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forpre(self, p):
+        'forpre : blocking_substitution'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forpre_empty(self, p):
+        'forpre : SEMICOLON'
+        p[0] = None
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forcond(self, p):
+        'forcond : cond SEMICOLON'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forcond_empty(self, p):
+        'forcond : SEMICOLON'
+        p[0] = None
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forpost(self, p):
+        'forpost : blocking_substitution_base'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_forpost_empty(self, p):
+        'forpost : empty'
+        p[0] = None
+
+    def p_forcontent_statement(self, p):
+        'forcontent_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_while_statement(self, p):
+        'while_statement : WHILE LPAREN cond RPAREN whilecontent_statement'
+        p[0] = WhileStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_whilecontent_statement(self, p):
+        'whilecontent_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_case_statement(self, p):
+        'case_statement : CASE LPAREN case_comp RPAREN casecontent_statements ENDCASE'
+        p[0] = CaseStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casex_statement(self, p):
+        'casex_statement : CASEX LPAREN case_comp RPAREN casecontent_statements ENDCASE'
+        p[0] = CasexStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casez_statement(self, p):
+        'casez_statement : CASEZ LPAREN case_comp RPAREN casecontent_statements ENDCASE'
+        p[0] = CasezStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_unique_case_statement(self, p):
+        'unique_case_statement : UNIQUE CASE LPAREN case_comp RPAREN casecontent_statements ENDCASE'
+        p[0] = UniqueCaseStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_case_comp(self, p):
+        'case_comp : expression'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_statements(self, p):
+        'casecontent_statements : casecontent_statements casecontent_statement'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_statements_one(self, p):
+        'casecontent_statements : casecontent_statement'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_statement(self, p):
+        'casecontent_statement : casecontent_condition COLON basic_statement'
+        p[0] = Case(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_condition_single(self, p):
+        'casecontent_condition : casecontent_condition COMMA expression'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_condition_one(self, p):
+        'casecontent_condition : expression'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_casecontent_statement_default(self, p):
+        'casecontent_statement : DEFAULT COLON basic_statement'
+        p[0] = Case(None, p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_initial(self, p):
+        'initial : INITIAL initial_statement'
+        p[0] = Initial(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_initial_statement(self, p):
+        'initial_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_event_statement(self, p):
+        'event_statement : senslist SEMICOLON'
+        p[0] = EventStatement(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_wait_statement(self, p):
+        'wait_statement : WAIT LPAREN cond RPAREN waitcontent_statement'
+        p[0] = WaitStatement(p[3], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_waitcontent_statement(self, p):
+        'waitcontent_statement : basic_statement'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_waitcontent_statement_empty(self, p):
+        'waitcontent_statement : SEMICOLON'
+        p[0] = None
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_forever_statement(self, p):
+        'forever_statement : FOREVER basic_statement'
+        p[0] = ForeverStatement(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_instance(self, p):
+        'instance : ID parameterlist instance_bodylist SEMICOLON'
+        instancelist = []
+        for instance_name, instance_ports, instance_array in p[3]:
+            instancelist.append(Instance(p[1], instance_name, instance_ports,
+                                         p[2], instance_array, lineno=p.lineno(1)))
+        p[0] = InstanceList(p[1], p[2], tuple(
+            instancelist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_or(self, p):
+        'instance : SENS_OR parameterlist instance_bodylist SEMICOLON'
+        instancelist = []
+        for instance_name, instance_ports, instance_array in p[3]:
+            instancelist.append(Instance(p[1], instance_name, instance_ports,
+                                         p[2], instance_array, lineno=p.lineno(1)))
+        p[0] = InstanceList(p[1], p[2], tuple(
+            instancelist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_bodylist(self, p):
+        'instance_bodylist : instance_bodylist COMMA instance_body'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_bodylist_one(self, p):
+        'instance_bodylist : instance_body'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_body(self, p):
+        'instance_body : ID LPAREN instance_ports RPAREN'
+        p[0] = (p[1], p[3], None)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_body_array(self, p):
+        'instance_body : ID width LPAREN instance_ports RPAREN'
+        p[0] = (p[1], p[4], p[2])
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_noname(self, p):
+        'instance : ID instance_bodylist_noname SEMICOLON'
+        instancelist = []
+        for instance_name, instance_ports, instance_array in p[2]:
+            instancelist.append(Instance(p[1], instance_name, instance_ports,
+                                         (), instance_array, lineno=p.lineno(1)))
+        p[0] = InstanceList(p[1], (), tuple(instancelist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_or_noname(self, p):
+        'instance : SENS_OR instance_bodylist_noname SEMICOLON'
+        instancelist = []
+        for instance_name, instance_ports, instance_array in p[2]:
+            instancelist.append(Instance(p[1], instance_name, instance_ports,
+                                         (), instance_array, lineno=p.lineno(1)))
+        p[0] = InstanceList(p[1], (), tuple(instancelist), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_bodylist_noname(self, p):
+        'instance_bodylist_noname : instance_bodylist_noname COMMA instance_body_noname'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_bodylist_one_noname(self, p):
+        'instance_bodylist_noname : instance_body_noname'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_body_noname(self, p):
+        'instance_body_noname : LPAREN instance_ports RPAREN'
+        p[0] = ('', p[2], None)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterlist(self, p):
+        'parameterlist : DELAY LPAREN param_args RPAREN'
+        p[0] = p[3]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterlist_noname(self, p):
+        'parameterlist : DELAY LPAREN param_args_noname RPAREN'
+        p[0] = p[3]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_parameterlist_empty(self, p):
+        'parameterlist : empty'
+        p[0] = ()
+
+    def p_param_args_noname(self, p):
+        'param_args_noname : param_args_noname COMMA param_arg_noname'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_args_noname_one(self, p):
+        'param_args_noname : param_arg_noname'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_args(self, p):
+        'param_args : param_args COMMA param_arg'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_args_one(self, p):
+        'param_args : param_arg'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_args_empty(self, p):
+        'param_args : empty'
+        p[0] = ()
+
+    def p_param_arg_noname_exp(self, p):
+        'param_arg_noname : expression'
+        p[0] = ParamArg(None, p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_param_arg_exp(self, p):
+        'param_arg : DOT ID LPAREN expression RPAREN'
+        p[0] = ParamArg(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports(self, p):
+        """instance_ports : instance_ports_list
+        | instance_ports_arg
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports_list(self, p):
+        'instance_ports_list : instance_ports_list COMMA instance_port_list'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports_list_one(self, p):
+        'instance_ports_list : instance_port_list'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports_list_empty(self, p):
+        'instance_ports_list : empty'
+        p[0] = ()
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_port_list(self, p):
+        'instance_port_list : expression'
+        p[0] = PortArg(None, p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports_arg(self, p):
+        'instance_ports_arg : instance_ports_arg COMMA instance_port_arg'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_ports_arg_one(self, p):
+        'instance_ports_arg : instance_port_arg'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_port_arg(self, p):
+        'instance_port_arg : DOT ID LPAREN identifier RPAREN'
+        p[0] = PortArg(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_port_arg_exp(self, p):
+        'instance_port_arg : DOT ID LPAREN expression RPAREN'
+        p[0] = PortArg(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_instance_port_arg_none(self, p):
+        'instance_port_arg : DOT ID LPAREN RPAREN'
+        p[0] = PortArg(p[2], None, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_genvardecl(self, p):
+        'genvardecl : GENVAR genvarlist SEMICOLON'
+        p[0] = Decl(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_genvarlist(self, p):
+        'genvarlist : genvarlist COMMA genvar'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_genvarlist_one(self, p):
+        'genvarlist : genvar'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_genvar(self, p):
+        'genvar : ID'
+        p[0] = Genvar(name=p[1],
+                      width=Width(msb=IntConst('31', lineno=p.lineno(1)),
+                                  lsb=IntConst('0', lineno=p.lineno(1)),
+                                  lineno=p.lineno(1)),
+                      lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate(self, p):
+        'generate : GENERATE generate_items ENDGENERATE'
+        p[0] = GenerateStatement(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_items_empty(self, p):
+        'generate_items : empty'
+        p[0] = ()
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_items(self, p):
+        'generate_items : generate_items generate_item'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_items_one(self, p):
+        'generate_items : generate_item'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_item(self, p):
+        """generate_item : standard_item
+        | generate_if
+        | generate_for
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_block(self, p):
+        'generate_block : BEGIN generate_items END'
+        p[0] = Block(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_named_block(self, p):
+        'generate_block : BEGIN COLON ID generate_items END'
+        p[0] = Block(p[4], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_if(self, p):
+        'generate_if : IF LPAREN cond RPAREN gif_true_item ELSE gif_false_item'
+        p[0] = IfStatement(p[3], p[5], p[7], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_if_woelse(self, p):
+        'generate_if : IF LPAREN cond RPAREN gif_true_item'
+        p[0] = IfStatement(p[3], p[5], None, lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_if_true_item(self, p):
+        """gif_true_item : generate_item
+        | generate_block
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_if_false_item(self, p):
+        """gif_false_item : generate_item
+        | generate_block
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_for(self, p):
+        'generate_for : FOR LPAREN forpre forcond forpost RPAREN generate_forcontent'
+        p[0] = ForStatement(p[3], p[4], p[5], p[7], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_generate_forcontent(self, p):
+        """generate_forcontent : generate_item
+        | generate_block
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_systemcall_noargs(self, p):
+        'systemcall : DOLLER ID'
+        p[0] = SystemCall(p[2], (), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_systemcall(self, p):
+        'systemcall : DOLLER ID LPAREN sysargs RPAREN'
+        p[0] = SystemCall(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_systemcall_signed(self, p):  # for $signed system task
+        'systemcall : DOLLER SIGNED LPAREN sysargs RPAREN'
+        p[0] = SystemCall(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sysargs(self, p):
+        'sysargs : sysargs COMMA sysarg'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sysargs_one(self, p):
+        'sysargs : sysarg'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_sysargs_empty(self, p):
+        'sysargs : empty'
+        p[0] = ()
+
+    def p_sysarg(self, p):
+        'sysarg : expression'
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_function(self, p):
+        'function : FUNCTION width ID SEMICOLON function_statement ENDFUNCTION'
+        p[0] = Function(p[3], p[2], p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_function_nowidth(self, p):
+        'function : FUNCTION ID SEMICOLON function_statement ENDFUNCTION'
+        p[0] = Function(p[2],
+                        Width(IntConst('0', lineno=p.lineno(1)),
+                              IntConst('0', lineno=p.lineno(1)),
+                              lineno=p.lineno(1)),
+                        p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_function_integer(self, p):
+        'function : FUNCTION INTEGER ID SEMICOLON function_statement ENDFUNCTION'
+        p[0] = Function(p[3],
+                        Width(IntConst('31', lineno=p.lineno(1)),
+                              IntConst('0', lineno=p.lineno(1)),
+                              lineno=p.lineno(1)),
+                        p[5], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_function_statement(self, p):
+        'function_statement : funcvardecls function_calc'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_funcvardecls(self, p):
+        'funcvardecls : funcvardecls funcvardecl'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_funcvardecls_one(self, p):
+        'funcvardecls : funcvardecl'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_funcvardecl(self, p):
+        """funcvardecl : decl
+        | integerdecl
+        """
+        if isinstance(p[1], Decl):
+            for r in p[1].list:
+                if (not isinstance(r, Input) and not isinstance(r, Reg) and
+                        not isinstance(r, Integer)):
+                    raise ParseError("Syntax Error")
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_function_calc(self, p):
+        """function_calc : blocking_substitution
+        | if_statement
+        | for_statement
+        | while_statement
+        | case_statement
+        | casex_statement
+        | casez_statement
+        | block
+        | namedblock
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_functioncall(self, p):
+        'functioncall : identifier LPAREN func_args RPAREN'
+        p[0] = FunctionCall(p[1], p[3], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_func_args(self, p):
+        'func_args : func_args COMMA expression'
+        p[0] = p[1] + (p[3],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_func_args_one(self, p):
+        'func_args : expression'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_func_args_empty(self, p):
+        'func_args : empty'
+        p[0] = ()
+
+    # --------------------------------------------------------------------------
+    def p_task(self, p):
+        'task : TASK ID SEMICOLON task_statement ENDTASK'
+        p[0] = Task(p[2], p[4], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_task_statement(self, p):
+        'task_statement : taskvardecls task_calc'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_taskvardecls(self, p):
+        'taskvardecls : taskvardecls taskvardecl'
+        p[0] = p[1] + (p[2],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_taskvardecls_one(self, p):
+        'taskvardecls : taskvardecl'
+        p[0] = (p[1],)
+        p.set_lineno(0, p.lineno(1))
+
+    def p_taskvardecls_empty(self, p):
+        'taskvardecls : empty'
+        p[0] = ()
+
+    def p_taskvardecl(self, p):
+        """taskvardecl : decl
+        | integerdecl
+        """
+        if isinstance(p[1], Decl):
+            for r in p[1].list:
+                if (not isinstance(r, Input) and not isinstance(r, Reg) and
+                        not isinstance(r, Integer)):
+                    raise ParseError("Syntax Error")
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    def p_task_calc(self, p):
+        """task_calc : blocking_substitution
+        | if_statement
+        | for_statement
+        | while_statement
+        | case_statement
+        | casex_statement
+        | casez_statement
+        | block
+        | namedblock
+        """
+        p[0] = p[1]
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_identifier(self, p):
+        'identifier : ID'
+        p[0] = Identifier(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_scope_identifier(self, p):
+        'identifier : scope ID'
+        p[0] = Identifier(p[2], p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_scope(self, p):
+        'scope : identifier DOT'
+        scope = () if p[1].scope is None else p[1].scope.labellist
+        p[0] = IdentifierScope(
+            scope + (IdentifierScopeLabel(p[1].name, lineno=p.lineno(1)),), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_scope_pointer(self, p):
+        'scope : pointer DOT'
+        scope = () if p[1].var.scope is None else p[1].var.scope.labellist
+        p[0] = IdentifierScope(scope + (IdentifierScopeLabel(p[1].var.name,
+                                                             p[1].ptr, lineno=p.lineno(1)),), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_disable(self, p):
+        'disable : DISABLE ID'
+        p[0] = Disable(p[2], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_single_statement_delays(self, p):
+        'single_statement : DELAY expression SEMICOLON'
+        p[0] = SingleStatement(DelayStatement(
+            p[2], lineno=p.lineno(1)), lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_single_statement_systemcall(self, p):
+        'single_statement : systemcall SEMICOLON'
+        p[0] = SingleStatement(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    def p_single_statement_disable(self, p):
+        'single_statement : disable SEMICOLON'
+        p[0] = SingleStatement(p[1], lineno=p.lineno(1))
+        p.set_lineno(0, p.lineno(1))
+
+    # fix me: to support task-call-statement
+    # def p_single_statement_taskcall(self, p):
+    #    'single_statement : functioncall SEMICOLON'
+    #    p[0] = SingleStatement(p[1], lineno=p.lineno(1))
+    #    p.set_lineno(0, p.lineno(1))
+
+    # def p_single_statement_taskcall_empty(self, p):
+    #    'single_statement : taskcall SEMICOLON'
+    #    p[0] = SingleStatement(p[1], lineno=p.lineno(1))
+    #    p.set_lineno(0, p.lineno(1))
+
+    # def p_taskcall_empty(self, p):
+    #    'taskcall : identifier'
+    #    p[0] = FunctionCall(p[1], (), lineno=p.lineno(1))
+    #    p.set_lineno(0, p.lineno(1))
+
+    # --------------------------------------------------------------------------
+    def p_empty(self, p):
+        'empty : '
+        pass
+
+    # --------------------------------------------------------------------------
+    def p_error(self, p):
+        self._raise_error(p)
+
+    # --------------------------------------------------------------------------
+    def _raise_error(self, p):
+        if p:
+            msg = 'before: "%s"' % p.value
+            coord = self._coord(p.lineno)
+        else:
+            msg = 'at end of input'
+            coord = None
+
+        raise ParseError("%s: %s" % (coord, msg))
+
+    def _coord(self, lineno, column=None):
+        ret = [self.lexer.filename]
+        ret.append('line:%s' % lineno)
+        if column is not None:
+            ret.append('column:%s' % column)
+        return ' '.join(ret)
+
+
+class ParseError(Exception):
+    pass
+
+
+class VerilogCodeParser(object):
+
+    def __init__(self, filelist, preprocess_output='preprocess.output',
+                 preprocess_include=None,
+                 preprocess_define=None,
+                 outputdir=".",
+                 debug=True
+                 ):
+        self.preprocess_output = preprocess_output
+        self.directives = ()
+        self.preprocessor = VerilogPreprocessor(filelist, preprocess_output,
+                                                preprocess_include,
+                                                preprocess_define)
+        self.parser = VerilogParser(outputdir=outputdir, debug=debug)
+
+    def preprocess(self):
+        self.preprocessor.preprocess()
+        text = open(self.preprocess_output).read()
+        os.remove(self.preprocess_output)
+        return text
+
+    def parse(self, preprocess_output='preprocess.output', debug=0):
+        text = self.preprocess()
+        ast = self.parser.parse(text, debug=debug)
+        self.directives = self.parser.get_directives()
+        return ast
+
+    def get_directives(self):
+        return self.directives
+
+
+def parse(
+    filelist,
+    preprocess_include=None,
+    preprocess_define=None,
+    outputdir=".",
+    debug=True
+):
+    codeparser = VerilogCodeParser(
+        filelist,
+        preprocess_include=preprocess_include,
+        preprocess_define=preprocess_define,
+        outputdir=outputdir,
+        debug=debug
+    )
+    ast = codeparser.parse()
+    directives = codeparser.get_directives()
+    return ast, directives
diff --git a/venv/lib/python3.9/site-packages/pyverilog/vparser/preprocessor.py b/venv/lib/python3.9/site-packages/pyverilog/vparser/preprocessor.py
new file mode 100644
index 0000000..4a45548
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/pyverilog/vparser/preprocessor.py
@@ -0,0 +1,103 @@
+"""
+   Copyright 2013, Shinya Takamaeda-Yamazaki and Contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   ----
+   Verilog Preprocessor
+ 
+   Icarus Verilog is used as the internal preprocessor.
+   Please install Icarus Verilog on your environment.
+"""
+
+from __future__ import absolute_import
+from __future__ import print_function
+import sys
+import os
+import tempfile
+import subprocess
+
+
+class VerilogPreprocessor(object):
+    def __init__(self, filelist, outputfile='pp.out', include=None, define=None):
+
+        if not isinstance(filelist, (tuple, list)):
+            filelist = list(filelist)
+
+        # Elements in `filelist` can either be raw Verilog files, or Verilog code
+        # in python string. The following loop iterates through these `sources`,
+        # and normalizes all of them into files.
+        #
+        # For Verilog code in python string, the contents of the string is stored
+        # in a temporary file for further use with `iverilog`.
+        self.temp_files_paths = []
+        self.filelist = []
+
+        for source in filelist:
+            # If `source` is verilog code in python strings
+            if not os.path.isfile(source):
+                temp_fd, temp_path = tempfile.mkstemp(prefix="pyverilog_temp_", suffix=".v")
+                with open(temp_fd, 'w') as f:
+                    f.write(source)
+
+                self.temp_files_paths.append(temp_path)
+
+            else: # else if it is normal verilog file path
+                self.filelist.append(source)
+
+        self.filelist += self.temp_files_paths
+
+        iverilog = os.environ.get('PYVERILOG_IVERILOG')
+        if iverilog is None:
+            iverilog = 'iverilog'
+
+        if include is None:
+            include = ()
+
+        if define is None:
+            define = ()
+
+        self.iv = [iverilog]
+
+        for inc in include:
+            self.iv.append('-I')
+            self.iv.append(inc)
+
+        for dfn in define:
+            self.iv.append('-D')
+            self.iv.append(dfn)
+
+        self.iv.append('-E')
+        self.iv.append('-o')
+        self.iv.append(outputfile)
+
+    def preprocess(self):
+        cmd = self.iv + list(self.filelist)
+        subprocess.call(cmd)
+
+        # Removing the temporary files that were created
+        for temp_file_path in self.temp_files_paths:
+            os.remove(temp_file_path)
+
+
+def preprocess(
+    filelist,
+    output='preprocess.output',
+    include=None,
+    define=None
+):
+    pre = VerilogPreprocessor(filelist, output, include, define)
+    pre.preprocess()
+    text = open(output).read()
+    os.remove(output)
+    return text
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/AUTHORS.txt b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/AUTHORS.txt
new file mode 100644
index 0000000..0360f98
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/AUTHORS.txt
@@ -0,0 +1,590 @@
+@Switch01
+A_Rog
+Aakanksha Agrawal
+Abhinav Sagar
+ABHYUDAY PRATAP SINGH
+abs51295
+AceGentile
+Adam Chainz
+Adam Tse
+Adam Wentz
+admin
+Adrien Morison
+ahayrapetyan
+Ahilya
+AinsworthK
+Akash Srivastava
+Alan Yee
+Albert Tugushev
+Albert-Guan
+albertg
+Aleks Bunin
+Alethea Flowers
+Alex Gaynor
+Alex Grönholm
+Alex Loosley
+Alex Morega
+Alex Stachowiak
+Alexander Shtyrov
+Alexandre Conrad
+Alexey Popravka
+Alli
+Ami Fischman
+Ananya Maiti
+Anatoly Techtonik
+Anders Kaseorg
+Andre Aguiar
+Andreas Lutro
+Andrei Geacar
+Andrew Gaul
+Andrey Bulgakov
+Andrés Delfino
+Andy Freeland
+Andy Kluger
+Ani Hayrapetyan
+Aniruddha Basak
+Anish Tambe
+Anrs Hu
+Anthony Sottile
+Antoine Musso
+Anton Ovchinnikov
+Anton Patrushev
+Antonio Alvarado Hernandez
+Antony Lee
+Antti Kaihola
+Anubhav Patel
+Anudit Nagar
+Anuj Godase
+AQNOUCH Mohammed
+AraHaan
+Arindam Choudhury
+Armin Ronacher
+Artem
+Ashley Manton
+Ashwin Ramaswami
+atse
+Atsushi Odagiri
+Avinash Karhana
+Avner Cohen
+Baptiste Mispelon
+Barney Gale
+barneygale
+Bartek Ogryczak
+Bastian Venthur
+Ben Darnell
+Ben Hoyt
+Ben Rosser
+Bence Nagy
+Benjamin Peterson
+Benjamin VanEvery
+Benoit Pierre
+Berker Peksag
+Bernard
+Bernard Tyers
+Bernardo B. Marques
+Bernhard M. Wiedemann
+Bertil Hatt
+Bhavam Vidyarthi
+Bogdan Opanchuk
+BorisZZZ
+Brad Erickson
+Bradley Ayers
+Brandon L. Reiss
+Brandt Bucher
+Brett Randall
+Brian Cristante
+Brian Rosner
+BrownTruck
+Bruno Oliveira
+Bruno Renié
+Bstrdsmkr
+Buck Golemon
+burrows
+Bussonnier Matthias
+c22
+Caleb Martinez
+Calvin Smith
+Carl Meyer
+Carlos Liam
+Carol Willing
+Carter Thayer
+Cass
+Chandrasekhar Atina
+Chih-Hsuan Yen
+Chris Brinker
+Chris Hunt
+Chris Jerdonek
+Chris McDonough
+Chris Wolfe
+Christian Clauss
+Christian Heimes
+Christian Oudard
+Christoph Reiter
+Christopher Hunt
+Christopher Snyder
+cjc7373
+Clark Boylan
+Clay McClure
+Cody
+Cody Soyland
+Colin Watson
+Connor Osborn
+Cooper Lees
+Cooper Ry Lees
+Cory Benfield
+Cory Wright
+Craig Kerstiens
+Cristian Sorinel
+Cristina
+Cristina Muñoz
+Curtis Doty
+cytolentino
+Damian Quiroga
+Dan Black
+Dan Savilonis
+Dan Sully
+daniel
+Daniel Collins
+Daniel Hahler
+Daniel Holth
+Daniel Jost
+Daniel Katz
+Daniel Shaulov
+Daniele Esposti
+Daniele Procida
+Danny Hermes
+Danny McClanahan
+Dav Clark
+Dave Abrahams
+Dave Jones
+David Aguilar
+David Black
+David Bordeynik
+David Caro
+David Evans
+David Linke
+David Poggi
+David Pursehouse
+David Tucker
+David Wales
+Davidovich
+Deepak Sharma
+derwolfe
+Desetude
+Devesh Kumar Singh
+Diego Caraballo
+DiegoCaraballo
+Dmitry Gladkov
+Domen Kožar
+Donald Stufft
+Dongweiming
+Douglas Thor
+DrFeathers
+Dustin Ingram
+Dwayne Bailey
+Ed Morley
+Eitan Adler
+ekristina
+elainechan
+Eli Schwartz
+Elisha Hollander
+Ellen Marie Dash
+Emil Burzo
+Emil Styrke
+Emmanuel Arias
+Endoh Takanao
+enoch
+Erdinc Mutlu
+Eric Gillingham
+Eric Hanchrow
+Eric Hopper
+Erik M. Bray
+Erik Rose
+Ernest W Durbin III
+Ernest W. Durbin III
+Erwin Janssen
+Eugene Vereshchagin
+everdimension
+Felix Yan
+fiber-space
+Filip Kokosiński
+Filipe Laíns
+Florian Briand
+Florian Rathgeber
+Francesco
+Francesco Montesano
+Frost Ming
+Gabriel Curio
+Gabriel de Perthuis
+Garry Polley
+gdanielson
+Geoffrey Sneddon
+George Song
+Georgi Valkov
+ghost
+Giftlin Rajaiah
+gizmoguy1
+gkdoc
+Gopinath M
+GOTO Hayato
+gpiks
+Greg Ward
+Guilherme Espada
+gutsytechster
+Guy Rozendorn
+gzpan123
+Hanjun Kim
+Hari Charan
+Harsh Vardhan
+Herbert Pfennig
+Hsiaoming Yang
+Hugo
+Hugo Lopes Tavares
+Hugo van Kemenade
+hugovk
+Hynek Schlawack
+Ian Bicking
+Ian Cordasco
+Ian Lee
+Ian Stapleton Cordasco
+Ian Wienand
+Igor Kuzmitshov
+Igor Sobreira
+Ilan Schnell
+Ilya Baryshev
+INADA Naoki
+Ionel Cristian Mărieș
+Ionel Maries Cristian
+Ivan Pozdeev
+Jacob Kim
+jakirkham
+Jakub Stasiak
+Jakub Vysoky
+Jakub Wilk
+James Cleveland
+James Firth
+James Polley
+Jan Pokorný
+Jannis Leidel
+jarondl
+Jason R. Coombs
+Jay Graves
+Jean-Christophe Fillion-Robin
+Jeff Barber
+Jeff Dairiki
+Jelmer Vernooĳ
+jenix21
+Jeremy Stanley
+Jeremy Zafran
+Jiashuo Li
+Jim Garrison
+Jivan Amara
+John Paton
+John T. Wodder II
+John-Scott Atlakson
+johnthagen
+Jon Banafato
+Jon Dufresne
+Jon Parise
+Jonas Nockert
+Jonathan Herbert
+Joost Molenaar
+Jorge Niedbalski
+Joseph Long
+Josh Bronson
+Josh Hansen
+Josh Schneier
+Juanjo Bazán
+Julian Berman
+Julian Gethmann
+Julien Demoor
+Jussi Kukkonen
+jwg4
+Jyrki Pulliainen
+Kai Chen
+Kamal Bin Mustafa
+kaustav haldar
+keanemind
+Keith Maxwell
+Kelsey Hightower
+Kenneth Belitzky
+Kenneth Reitz
+Kevin Burke
+Kevin Carter
+Kevin Frommelt
+Kevin R Patterson
+Kexuan Sun
+Kit Randel
+KOLANICH
+kpinc
+Krishna Oza
+Kumar McMillan
+Kyle Persohn
+lakshmanaram
+Laszlo Kiss-Kollar
+Laurent Bristiel
+Laurie O
+Laurie Opperman
+Leon Sasson
+Lev Givon
+Lincoln de Sousa
+Lipis
+Loren Carvalho
+Lucas Cimon
+Ludovic Gasc
+Luke Macken
+Luo Jiebin
+luojiebin
+luz.paz
+László Kiss Kollár
+Marc Abramowitz
+Marc Tamlyn
+Marcus Smith
+Mariatta
+Mark Kohler
+Mark Williams
+Markus Hametner
+Masaki
+Masklinn
+Matej Stuchlik
+Mathew Jennings
+Mathieu Bridon
+Matt Good
+Matt Maker
+Matt Robenolt
+matthew
+Matthew Einhorn
+Matthew Gilliard
+Matthew Iversen
+Matthew Trumbell
+Matthew Willson
+Matthias Bussonnier
+mattip
+Maxim Kurnikov
+Maxime Rouyrre
+mayeut
+mbaluna
+mdebi
+memoselyk
+Michael
+Michael Aquilina
+Michael E. Karpeles
+Michael Klich
+Michael Williamson
+michaelpacer
+Mickaël Schoentgen
+Miguel Araujo Perez
+Mihir Singh
+Mike
+Mike Hendricks
+Min RK
+MinRK
+Miro Hrončok
+Monica Baluna
+montefra
+Monty Taylor
+Nate Coraor
+Nathaniel J. Smith
+Nehal J Wani
+Neil Botelho
+Nguyễn Gia Phong
+Nick Coghlan
+Nick Stenning
+Nick Timkovich
+Nicolas Bock
+Nicole Harris
+Nikhil Benesch
+Nikolay Korolev
+Nitesh Sharma
+Noah
+Noah Gorny
+Nowell Strite
+NtaleGrey
+nvdv
+Ofekmeister
+ofrinevo
+Oliver Jeeves
+Oliver Mannion
+Oliver Tonnhofer
+Olivier Girardot
+Olivier Grisel
+Ollie Rutherfurd
+OMOTO Kenji
+Omry Yadan
+onlinejudge95
+Oren Held
+Oscar Benjamin
+Oz N Tiram
+Pachwenko
+Patrick Dubroy
+Patrick Jenkins
+Patrick Lawson
+patricktokeeffe
+Patrik Kopkan
+Paul Kehrer
+Paul Moore
+Paul Nasrat
+Paul Oswald
+Paul van der Linden
+Paulus Schoutsen
+Pavithra Eswaramoorthy
+Pawel Jasinski
+Pekka Klärck
+Peter Lisák
+Peter Waller
+petr-tik
+Phaneendra Chiruvella
+Phil Elson
+Phil Freo
+Phil Pennock
+Phil Whelan
+Philip Jägenstedt
+Philip Molloy
+Philippe Ombredanne
+Pi Delport
+Pierre-Yves Rofes
+pip
+Prabakaran Kumaresshan
+Prabhjyotsing Surjit Singh Sodhi
+Prabhu Marappan
+Pradyun Gedam
+Prashant Sharma
+Pratik Mallya
+Preet Thakkar
+Preston Holmes
+Przemek Wrzos
+Pulkit Goyal
+Qiangning Hong
+Quentin Pradet
+R. David Murray
+Rafael Caricio
+Ralf Schmitt
+Razzi Abuissa
+rdb
+Reece Dunham
+Remi Rampin
+Rene Dudfield
+Riccardo Magliocchetti
+Richard Jones
+Ricky Ng-Adam
+RobberPhex
+Robert Collins
+Robert McGibbon
+Robert T. McGibbon
+robin elisha robinson
+Roey Berman
+Rohan Jain
+Roman Bogorodskiy
+Romuald Brunet
+Ronny Pfannschmidt
+Rory McCann
+Ross Brattain
+Roy Wellington Ⅳ
+Ruairidh MacLeod
+Ryan Wooden
+ryneeverett
+Sachi King
+Salvatore Rinchiera
+Savio Jomton
+schlamar
+Scott Kitterman
+Sean
+seanj
+Sebastian Jordan
+Sebastian Schaetz
+Segev Finer
+SeongSoo Cho
+Sergey Vasilyev
+Seth Woodworth
+shireenrao
+Shlomi Fish
+Shovan Maity
+Simeon Visser
+Simon Cross
+Simon Pichugin
+sinoroc
+sinscary
+socketubs
+Sorin Sbarnea
+Srinivas Nyayapati
+Stavros Korokithakis
+Stefan Scherfke
+Stefano Rivera
+Stephan Erb
+stepshal
+Steve (Gadget) Barnes
+Steve Barnes
+Steve Dower
+Steve Kowalik
+Steven Myint
+stonebig
+Stéphane Bidoul
+Stéphane Bidoul (ACSONE)
+Stéphane Klein
+Sumana Harihareswara
+Surbhi Sharma
+Sviatoslav Sydorenko
+Swat009
+Takayuki SHIMIZUKAWA
+tbeswick
+Thijs Triemstra
+Thomas Fenzl
+Thomas Grainger
+Thomas Guettler
+Thomas Johansson
+Thomas Kluyver
+Thomas Smith
+Tim D. Smith
+Tim Gates
+Tim Harder
+Tim Heap
+tim smith
+tinruufu
+Tom Forbes
+Tom Freudenheim
+Tom V
+Tomas Hrnciar
+Tomas Orsava
+Tomer Chachamu
+Tony Beswick
+Tony Zhaocheng Tan
+TonyBeswick
+toonarmycaptain
+Toshio Kuratomi
+toxinu
+Travis Swicegood
+Tzu-ping Chung
+Valentin Haenel
+Victor Stinner
+victorvpaulo
+Vikram - Google
+Viktor Szépe
+Ville Skyttä
+Vinay Sajip
+Vincent Philippon
+Vinicyus Macedo
+Vipul Kumar
+Vitaly Babiy
+Vladimir Rutsky
+W. Trevor King
+Wil Tan
+Wilfred Hughes
+William ML Leslie
+William T Olson
+Wilson Mo
+wim glenn
+Wolfgang Maier
+Xavier Fernandez
+xoviat
+xtreak
+YAMAMOTO Takashi
+Yen Chi Hsuan
+Yeray Diaz Diaz
+Yoval P
+Yu Jian
+Yuan Jing Vincent Yan
+Zearin
+Zhiping Deng
+Zvezdan Petkovic
+Łukasz Langa
+Семён Марьясин
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/INSTALLER b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/INSTALLER
new file mode 100644
index 0000000..a1b589e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/INSTALLER
@@ -0,0 +1 @@
+pip
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/LICENSE.txt b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/LICENSE.txt
new file mode 100644
index 0000000..75eb0fd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/LICENSE.txt
@@ -0,0 +1,20 @@
+Copyright (c) 2008-2020 The pip developers (see AUTHORS.txt file)
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/METADATA b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/METADATA
new file mode 100644
index 0000000..a1a8d09
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/METADATA
@@ -0,0 +1,82 @@
+Metadata-Version: 2.1
+Name: setuptools
+Version: 44.1.1
+Summary: Easily download, build, install, upgrade, and uninstall Python packages
+Home-page: https://github.com/pypa/setuptools
+Author: Python Packaging Authority
+Author-email: distutils-sig@python.org
+License: UNKNOWN
+Project-URL: Documentation, https://setuptools.readthedocs.io/
+Keywords: CPAN PyPI distutils eggs package management
+Platform: UNKNOWN
+Classifier: Development Status :: 5 - Production/Stable
+Classifier: Intended Audience :: Developers
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Operating System :: OS Independent
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Classifier: Topic :: Software Development :: Libraries :: Python Modules
+Classifier: Topic :: System :: Archiving :: Packaging
+Classifier: Topic :: System :: Systems Administration
+Classifier: Topic :: Utilities
+Requires-Python: !=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7
+Description-Content-Type: text/x-rst; charset=UTF-8
+
+.. image:: https://img.shields.io/pypi/v/setuptools.svg
+   :target: https://pypi.org/project/setuptools
+
+.. image:: https://img.shields.io/readthedocs/setuptools/latest.svg
+    :target: https://setuptools.readthedocs.io
+
+.. image:: https://img.shields.io/travis/pypa/setuptools/master.svg?label=Linux%20CI&logo=travis&logoColor=white
+   :target: https://travis-ci.org/pypa/setuptools
+
+.. image:: https://img.shields.io/appveyor/ci/pypa/setuptools/master.svg?label=Windows%20CI&logo=appveyor&logoColor=white
+   :target: https://ci.appveyor.com/project/pypa/setuptools/branch/master
+
+.. image:: https://img.shields.io/codecov/c/github/pypa/setuptools/master.svg?logo=codecov&logoColor=white
+   :target: https://codecov.io/gh/pypa/setuptools
+
+.. image:: https://tidelift.com/badges/github/pypa/setuptools?style=flat
+   :target: https://tidelift.com/subscription/pkg/pypi-setuptools?utm_source=pypi-setuptools&utm_medium=readme
+
+.. image:: https://img.shields.io/pypi/pyversions/setuptools.svg
+
+See the `Installation Instructions
+<https://packaging.python.org/installing/>`_ in the Python Packaging
+User's Guide for instructions on installing, upgrading, and uninstalling
+Setuptools.
+
+Questions and comments should be directed to the `distutils-sig
+mailing list <http://mail.python.org/pipermail/distutils-sig/>`_.
+Bug reports and especially tested patches may be
+submitted directly to the `bug tracker
+<https://github.com/pypa/setuptools/issues>`_.
+
+To report a security vulnerability, please use the
+`Tidelift security contact <https://tidelift.com/security>`_.
+Tidelift will coordinate the fix and disclosure.
+
+
+For Enterprise
+==============
+
+Available as part of the Tidelift Subscription.
+
+Setuptools and the maintainers of thousands of other packages are working with Tidelift to deliver one enterprise subscription that covers all of the open source you use.
+
+`Learn more <https://tidelift.com/subscription/pkg/pypi-setuptools?utm_source=pypi-setuptools&utm_medium=referral&utm_campaign=github>`_.
+
+Code of Conduct
+===============
+
+Everyone interacting in the setuptools project's codebases, issue trackers,
+chat rooms, and mailing lists is expected to follow the
+`PyPA Code of Conduct <https://www.pypa.io/en/latest/code-of-conduct/>`_.
+
+
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new file mode 100644
index 0000000..5dcbccb
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diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/REQUESTED b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/REQUESTED
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/REQUESTED
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/WHEEL b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/WHEEL
new file mode 100644
index 0000000..ef99c6c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/WHEEL
@@ -0,0 +1,6 @@
+Wheel-Version: 1.0
+Generator: bdist_wheel (0.34.2)
+Root-Is-Purelib: true
+Tag: py2-none-any
+Tag: py3-none-any
+
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/dependency_links.txt b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/dependency_links.txt
new file mode 100644
index 0000000..e87d021
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/dependency_links.txt
@@ -0,0 +1,2 @@
+https://files.pythonhosted.org/packages/source/c/certifi/certifi-2016.9.26.tar.gz#md5=baa81e951a29958563689d868ef1064d
+https://files.pythonhosted.org/packages/source/w/wincertstore/wincertstore-0.2.zip#md5=ae728f2f007185648d0c7a8679b361e2
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/entry_points.txt b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/entry_points.txt
new file mode 100644
index 0000000..0fed3f1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/entry_points.txt
@@ -0,0 +1,68 @@
+[console_scripts]
+easy_install = setuptools.command.easy_install:main
+
+[distutils.commands]
+alias = setuptools.command.alias:alias
+bdist_egg = setuptools.command.bdist_egg:bdist_egg
+bdist_rpm = setuptools.command.bdist_rpm:bdist_rpm
+bdist_wininst = setuptools.command.bdist_wininst:bdist_wininst
+build_clib = setuptools.command.build_clib:build_clib
+build_ext = setuptools.command.build_ext:build_ext
+build_py = setuptools.command.build_py:build_py
+develop = setuptools.command.develop:develop
+dist_info = setuptools.command.dist_info:dist_info
+easy_install = setuptools.command.easy_install:easy_install
+egg_info = setuptools.command.egg_info:egg_info
+install = setuptools.command.install:install
+install_egg_info = setuptools.command.install_egg_info:install_egg_info
+install_lib = setuptools.command.install_lib:install_lib
+install_scripts = setuptools.command.install_scripts:install_scripts
+rotate = setuptools.command.rotate:rotate
+saveopts = setuptools.command.saveopts:saveopts
+sdist = setuptools.command.sdist:sdist
+setopt = setuptools.command.setopt:setopt
+test = setuptools.command.test:test
+upload_docs = setuptools.command.upload_docs:upload_docs
+
+[distutils.setup_keywords]
+convert_2to3_doctests = setuptools.dist:assert_string_list
+dependency_links = setuptools.dist:assert_string_list
+eager_resources = setuptools.dist:assert_string_list
+entry_points = setuptools.dist:check_entry_points
+exclude_package_data = setuptools.dist:check_package_data
+extras_require = setuptools.dist:check_extras
+include_package_data = setuptools.dist:assert_bool
+install_requires = setuptools.dist:check_requirements
+namespace_packages = setuptools.dist:check_nsp
+package_data = setuptools.dist:check_package_data
+packages = setuptools.dist:check_packages
+python_requires = setuptools.dist:check_specifier
+setup_requires = setuptools.dist:check_requirements
+test_loader = setuptools.dist:check_importable
+test_runner = setuptools.dist:check_importable
+test_suite = setuptools.dist:check_test_suite
+tests_require = setuptools.dist:check_requirements
+use_2to3 = setuptools.dist:assert_bool
+use_2to3_exclude_fixers = setuptools.dist:assert_string_list
+use_2to3_fixers = setuptools.dist:assert_string_list
+zip_safe = setuptools.dist:assert_bool
+
+[egg_info.writers]
+PKG-INFO = setuptools.command.egg_info:write_pkg_info
+dependency_links.txt = setuptools.command.egg_info:overwrite_arg
+depends.txt = setuptools.command.egg_info:warn_depends_obsolete
+eager_resources.txt = setuptools.command.egg_info:overwrite_arg
+entry_points.txt = setuptools.command.egg_info:write_entries
+namespace_packages.txt = setuptools.command.egg_info:overwrite_arg
+requires.txt = setuptools.command.egg_info:write_requirements
+top_level.txt = setuptools.command.egg_info:write_toplevel_names
+
+[setuptools.finalize_distribution_options]
+2to3_doctests = setuptools.dist:Distribution._finalize_2to3_doctests
+features = setuptools.dist:Distribution._finalize_feature_opts
+keywords = setuptools.dist:Distribution._finalize_setup_keywords
+parent_finalize = setuptools.dist:_Distribution.finalize_options
+
+[setuptools.installation]
+eggsecutable = setuptools.command.easy_install:bootstrap
+
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/top_level.txt b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/top_level.txt
new file mode 100644
index 0000000..4577c6a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/top_level.txt
@@ -0,0 +1,3 @@
+easy_install
+pkg_resources
+setuptools
diff --git a/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/zip-safe b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/zip-safe
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools-44.1.1.dist-info/zip-safe
@@ -0,0 +1 @@
+
diff --git a/venv/lib/python3.9/site-packages/setuptools/__init__.py b/venv/lib/python3.9/site-packages/setuptools/__init__.py
new file mode 100644
index 0000000..9d8ae1e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/__init__.py
@@ -0,0 +1,245 @@
+"""Extensions to the 'distutils' for large or complex distributions"""
+
+import os
+import sys
+import functools
+import distutils.core
+import distutils.filelist
+import re
+from distutils.errors import DistutilsOptionError
+from distutils.util import convert_path
+from fnmatch import fnmatchcase
+
+from ._deprecation_warning import SetuptoolsDeprecationWarning
+
+from setuptools.extern.six import PY3, string_types
+from setuptools.extern.six.moves import filter, map
+
+import setuptools.version
+from setuptools.extension import Extension
+from setuptools.dist import Distribution, Feature
+from setuptools.depends import Require
+from . import monkey
+
+__metaclass__ = type
+
+
+__all__ = [
+    'setup', 'Distribution', 'Feature', 'Command', 'Extension', 'Require',
+    'SetuptoolsDeprecationWarning',
+    'find_packages'
+]
+
+if PY3:
+  __all__.append('find_namespace_packages')
+
+__version__ = setuptools.version.__version__
+
+bootstrap_install_from = None
+
+# If we run 2to3 on .py files, should we also convert docstrings?
+# Default: yes; assume that we can detect doctests reliably
+run_2to3_on_doctests = True
+# Standard package names for fixer packages
+lib2to3_fixer_packages = ['lib2to3.fixes']
+
+
+class PackageFinder:
+    """
+    Generate a list of all Python packages found within a directory
+    """
+
+    @classmethod
+    def find(cls, where='.', exclude=(), include=('*',)):
+        """Return a list all Python packages found within directory 'where'
+
+        'where' is the root directory which will be searched for packages.  It
+        should be supplied as a "cross-platform" (i.e. URL-style) path; it will
+        be converted to the appropriate local path syntax.
+
+        'exclude' is a sequence of package names to exclude; '*' can be used
+        as a wildcard in the names, such that 'foo.*' will exclude all
+        subpackages of 'foo' (but not 'foo' itself).
+
+        'include' is a sequence of package names to include.  If it's
+        specified, only the named packages will be included.  If it's not
+        specified, all found packages will be included.  'include' can contain
+        shell style wildcard patterns just like 'exclude'.
+        """
+
+        return list(cls._find_packages_iter(
+            convert_path(where),
+            cls._build_filter('ez_setup', '*__pycache__', *exclude),
+            cls._build_filter(*include)))
+
+    @classmethod
+    def _find_packages_iter(cls, where, exclude, include):
+        """
+        All the packages found in 'where' that pass the 'include' filter, but
+        not the 'exclude' filter.
+        """
+        for root, dirs, files in os.walk(where, followlinks=True):
+            # Copy dirs to iterate over it, then empty dirs.
+            all_dirs = dirs[:]
+            dirs[:] = []
+
+            for dir in all_dirs:
+                full_path = os.path.join(root, dir)
+                rel_path = os.path.relpath(full_path, where)
+                package = rel_path.replace(os.path.sep, '.')
+
+                # Skip directory trees that are not valid packages
+                if ('.' in dir or not cls._looks_like_package(full_path)):
+                    continue
+
+                # Should this package be included?
+                if include(package) and not exclude(package):
+                    yield package
+
+                # Keep searching subdirectories, as there may be more packages
+                # down there, even if the parent was excluded.
+                dirs.append(dir)
+
+    @staticmethod
+    def _looks_like_package(path):
+        """Does a directory look like a package?"""
+        return os.path.isfile(os.path.join(path, '__init__.py'))
+
+    @staticmethod
+    def _build_filter(*patterns):
+        """
+        Given a list of patterns, return a callable that will be true only if
+        the input matches at least one of the patterns.
+        """
+        return lambda name: any(fnmatchcase(name, pat=pat) for pat in patterns)
+
+
+class PEP420PackageFinder(PackageFinder):
+    @staticmethod
+    def _looks_like_package(path):
+        return True
+
+
+find_packages = PackageFinder.find
+
+if PY3:
+  find_namespace_packages = PEP420PackageFinder.find
+
+
+def _install_setup_requires(attrs):
+    # Note: do not use `setuptools.Distribution` directly, as
+    # our PEP 517 backend patch `distutils.core.Distribution`.
+    class MinimalDistribution(distutils.core.Distribution):
+        """
+        A minimal version of a distribution for supporting the
+        fetch_build_eggs interface.
+        """
+        def __init__(self, attrs):
+            _incl = 'dependency_links', 'setup_requires'
+            filtered = {
+                k: attrs[k]
+                for k in set(_incl) & set(attrs)
+            }
+            distutils.core.Distribution.__init__(self, filtered)
+
+        def finalize_options(self):
+            """
+            Disable finalize_options to avoid building the working set.
+            Ref #2158.
+            """
+
+    dist = MinimalDistribution(attrs)
+
+    # Honor setup.cfg's options.
+    dist.parse_config_files(ignore_option_errors=True)
+    if dist.setup_requires:
+        dist.fetch_build_eggs(dist.setup_requires)
+
+
+def setup(**attrs):
+    # Make sure we have any requirements needed to interpret 'attrs'.
+    _install_setup_requires(attrs)
+    return distutils.core.setup(**attrs)
+
+setup.__doc__ = distutils.core.setup.__doc__
+
+
+_Command = monkey.get_unpatched(distutils.core.Command)
+
+
+class Command(_Command):
+    __doc__ = _Command.__doc__
+
+    command_consumes_arguments = False
+
+    def __init__(self, dist, **kw):
+        """
+        Construct the command for dist, updating
+        vars(self) with any keyword parameters.
+        """
+        _Command.__init__(self, dist)
+        vars(self).update(kw)
+
+    def _ensure_stringlike(self, option, what, default=None):
+        val = getattr(self, option)
+        if val is None:
+            setattr(self, option, default)
+            return default
+        elif not isinstance(val, string_types):
+            raise DistutilsOptionError("'%s' must be a %s (got `%s`)"
+                                       % (option, what, val))
+        return val
+
+    def ensure_string_list(self, option):
+        r"""Ensure that 'option' is a list of strings.  If 'option' is
+        currently a string, we split it either on /,\s*/ or /\s+/, so
+        "foo bar baz", "foo,bar,baz", and "foo,   bar baz" all become
+        ["foo", "bar", "baz"].
+        """
+        val = getattr(self, option)
+        if val is None:
+            return
+        elif isinstance(val, string_types):
+            setattr(self, option, re.split(r',\s*|\s+', val))
+        else:
+            if isinstance(val, list):
+                ok = all(isinstance(v, string_types) for v in val)
+            else:
+                ok = False
+            if not ok:
+                raise DistutilsOptionError(
+                      "'%s' must be a list of strings (got %r)"
+                      % (option, val))
+
+    def reinitialize_command(self, command, reinit_subcommands=0, **kw):
+        cmd = _Command.reinitialize_command(self, command, reinit_subcommands)
+        vars(cmd).update(kw)
+        return cmd
+
+
+def _find_all_simple(path):
+    """
+    Find all files under 'path'
+    """
+    results = (
+        os.path.join(base, file)
+        for base, dirs, files in os.walk(path, followlinks=True)
+        for file in files
+    )
+    return filter(os.path.isfile, results)
+
+
+def findall(dir=os.curdir):
+    """
+    Find all files under 'dir' and return the list of full filenames.
+    Unless dir is '.', return full filenames with dir prepended.
+    """
+    files = _find_all_simple(dir)
+    if dir == os.curdir:
+        make_rel = functools.partial(os.path.relpath, start=dir)
+        files = map(make_rel, files)
+    return list(files)
+
+
+# Apply monkey patches
+monkey.patch_all()
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diff --git a/venv/lib/python3.9/site-packages/setuptools/_deprecation_warning.py b/venv/lib/python3.9/site-packages/setuptools/_deprecation_warning.py
new file mode 100644
index 0000000..086b64d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_deprecation_warning.py
@@ -0,0 +1,7 @@
+class SetuptoolsDeprecationWarning(Warning):
+    """
+    Base class for warning deprecations in ``setuptools``
+
+    This class is not derived from ``DeprecationWarning``, and as such is
+    visible by default.
+    """
diff --git a/venv/lib/python3.9/site-packages/setuptools/_imp.py b/venv/lib/python3.9/site-packages/setuptools/_imp.py
new file mode 100644
index 0000000..a3cce9b
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_imp.py
@@ -0,0 +1,73 @@
+"""
+Re-implementation of find_module and get_frozen_object
+from the deprecated imp module.
+"""
+
+import os
+import importlib.util
+import importlib.machinery
+
+from .py34compat import module_from_spec
+
+
+PY_SOURCE = 1
+PY_COMPILED = 2
+C_EXTENSION = 3
+C_BUILTIN = 6
+PY_FROZEN = 7
+
+
+def find_module(module, paths=None):
+    """Just like 'imp.find_module()', but with package support"""
+    spec = importlib.util.find_spec(module, paths)
+    if spec is None:
+        raise ImportError("Can't find %s" % module)
+    if not spec.has_location and hasattr(spec, 'submodule_search_locations'):
+        spec = importlib.util.spec_from_loader('__init__.py', spec.loader)
+
+    kind = -1
+    file = None
+    static = isinstance(spec.loader, type)
+    if spec.origin == 'frozen' or static and issubclass(
+            spec.loader, importlib.machinery.FrozenImporter):
+        kind = PY_FROZEN
+        path = None  # imp compabilty
+        suffix = mode = ''  # imp compability
+    elif spec.origin == 'built-in' or static and issubclass(
+            spec.loader, importlib.machinery.BuiltinImporter):
+        kind = C_BUILTIN
+        path = None  # imp compabilty
+        suffix = mode = ''  # imp compability
+    elif spec.has_location:
+        path = spec.origin
+        suffix = os.path.splitext(path)[1]
+        mode = 'r' if suffix in importlib.machinery.SOURCE_SUFFIXES else 'rb'
+
+        if suffix in importlib.machinery.SOURCE_SUFFIXES:
+            kind = PY_SOURCE
+        elif suffix in importlib.machinery.BYTECODE_SUFFIXES:
+            kind = PY_COMPILED
+        elif suffix in importlib.machinery.EXTENSION_SUFFIXES:
+            kind = C_EXTENSION
+
+        if kind in {PY_SOURCE, PY_COMPILED}:
+            file = open(path, mode)
+    else:
+        path = None
+        suffix = mode = ''
+
+    return file, path, (suffix, mode, kind)
+
+
+def get_frozen_object(module, paths=None):
+    spec = importlib.util.find_spec(module, paths)
+    if not spec:
+        raise ImportError("Can't find %s" % module)
+    return spec.loader.get_code(module)
+
+
+def get_module(module, paths, info):
+    spec = importlib.util.find_spec(module, paths)
+    if not spec:
+        raise ImportError("Can't find %s" % module)
+    return module_from_spec(spec)
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/__init__.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/__init__.py
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index 0000000..1487600
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/ordered_set.py
@@ -0,0 +1,488 @@
+"""
+An OrderedSet is a custom MutableSet that remembers its order, so that every
+entry has an index that can be looked up.
+
+Based on a recipe originally posted to ActiveState Recipes by Raymond Hettiger,
+and released under the MIT license.
+"""
+import itertools as it
+from collections import deque
+
+try:
+    # Python 3
+    from collections.abc import MutableSet, Sequence
+except ImportError:
+    # Python 2.7
+    from collections import MutableSet, Sequence
+
+SLICE_ALL = slice(None)
+__version__ = "3.1"
+
+
+def is_iterable(obj):
+    """
+    Are we being asked to look up a list of things, instead of a single thing?
+    We check for the `__iter__` attribute so that this can cover types that
+    don't have to be known by this module, such as NumPy arrays.
+
+    Strings, however, should be considered as atomic values to look up, not
+    iterables. The same goes for tuples, since they are immutable and therefore
+    valid entries.
+
+    We don't need to check for the Python 2 `unicode` type, because it doesn't
+    have an `__iter__` attribute anyway.
+    """
+    return (
+        hasattr(obj, "__iter__")
+        and not isinstance(obj, str)
+        and not isinstance(obj, tuple)
+    )
+
+
+class OrderedSet(MutableSet, Sequence):
+    """
+    An OrderedSet is a custom MutableSet that remembers its order, so that
+    every entry has an index that can be looked up.
+
+    Example:
+        >>> OrderedSet([1, 1, 2, 3, 2])
+        OrderedSet([1, 2, 3])
+    """
+
+    def __init__(self, iterable=None):
+        self.items = []
+        self.map = {}
+        if iterable is not None:
+            self |= iterable
+
+    def __len__(self):
+        """
+        Returns the number of unique elements in the ordered set
+
+        Example:
+            >>> len(OrderedSet([]))
+            0
+            >>> len(OrderedSet([1, 2]))
+            2
+        """
+        return len(self.items)
+
+    def __getitem__(self, index):
+        """
+        Get the item at a given index.
+
+        If `index` is a slice, you will get back that slice of items, as a
+        new OrderedSet.
+
+        If `index` is a list or a similar iterable, you'll get a list of
+        items corresponding to those indices. This is similar to NumPy's
+        "fancy indexing". The result is not an OrderedSet because you may ask
+        for duplicate indices, and the number of elements returned should be
+        the number of elements asked for.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset[1]
+            2
+        """
+        if isinstance(index, slice) and index == SLICE_ALL:
+            return self.copy()
+        elif is_iterable(index):
+            return [self.items[i] for i in index]
+        elif hasattr(index, "__index__") or isinstance(index, slice):
+            result = self.items[index]
+            if isinstance(result, list):
+                return self.__class__(result)
+            else:
+                return result
+        else:
+            raise TypeError("Don't know how to index an OrderedSet by %r" % index)
+
+    def copy(self):
+        """
+        Return a shallow copy of this object.
+
+        Example:
+            >>> this = OrderedSet([1, 2, 3])
+            >>> other = this.copy()
+            >>> this == other
+            True
+            >>> this is other
+            False
+        """
+        return self.__class__(self)
+
+    def __getstate__(self):
+        if len(self) == 0:
+            # The state can't be an empty list.
+            # We need to return a truthy value, or else __setstate__ won't be run.
+            #
+            # This could have been done more gracefully by always putting the state
+            # in a tuple, but this way is backwards- and forwards- compatible with
+            # previous versions of OrderedSet.
+            return (None,)
+        else:
+            return list(self)
+
+    def __setstate__(self, state):
+        if state == (None,):
+            self.__init__([])
+        else:
+            self.__init__(state)
+
+    def __contains__(self, key):
+        """
+        Test if the item is in this ordered set
+
+        Example:
+            >>> 1 in OrderedSet([1, 3, 2])
+            True
+            >>> 5 in OrderedSet([1, 3, 2])
+            False
+        """
+        return key in self.map
+
+    def add(self, key):
+        """
+        Add `key` as an item to this OrderedSet, then return its index.
+
+        If `key` is already in the OrderedSet, return the index it already
+        had.
+
+        Example:
+            >>> oset = OrderedSet()
+            >>> oset.append(3)
+            0
+            >>> print(oset)
+            OrderedSet([3])
+        """
+        if key not in self.map:
+            self.map[key] = len(self.items)
+            self.items.append(key)
+        return self.map[key]
+
+    append = add
+
+    def update(self, sequence):
+        """
+        Update the set with the given iterable sequence, then return the index
+        of the last element inserted.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.update([3, 1, 5, 1, 4])
+            4
+            >>> print(oset)
+            OrderedSet([1, 2, 3, 5, 4])
+        """
+        item_index = None
+        try:
+            for item in sequence:
+                item_index = self.add(item)
+        except TypeError:
+            raise ValueError(
+                "Argument needs to be an iterable, got %s" % type(sequence)
+            )
+        return item_index
+
+    def index(self, key):
+        """
+        Get the index of a given entry, raising an IndexError if it's not
+        present.
+
+        `key` can be an iterable of entries that is not a string, in which case
+        this returns a list of indices.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.index(2)
+            1
+        """
+        if is_iterable(key):
+            return [self.index(subkey) for subkey in key]
+        return self.map[key]
+
+    # Provide some compatibility with pd.Index
+    get_loc = index
+    get_indexer = index
+
+    def pop(self):
+        """
+        Remove and return the last element from the set.
+
+        Raises KeyError if the set is empty.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.pop()
+            3
+        """
+        if not self.items:
+            raise KeyError("Set is empty")
+
+        elem = self.items[-1]
+        del self.items[-1]
+        del self.map[elem]
+        return elem
+
+    def discard(self, key):
+        """
+        Remove an element.  Do not raise an exception if absent.
+
+        The MutableSet mixin uses this to implement the .remove() method, which
+        *does* raise an error when asked to remove a non-existent item.
+
+        Example:
+            >>> oset = OrderedSet([1, 2, 3])
+            >>> oset.discard(2)
+            >>> print(oset)
+            OrderedSet([1, 3])
+            >>> oset.discard(2)
+            >>> print(oset)
+            OrderedSet([1, 3])
+        """
+        if key in self:
+            i = self.map[key]
+            del self.items[i]
+            del self.map[key]
+            for k, v in self.map.items():
+                if v >= i:
+                    self.map[k] = v - 1
+
+    def clear(self):
+        """
+        Remove all items from this OrderedSet.
+        """
+        del self.items[:]
+        self.map.clear()
+
+    def __iter__(self):
+        """
+        Example:
+            >>> list(iter(OrderedSet([1, 2, 3])))
+            [1, 2, 3]
+        """
+        return iter(self.items)
+
+    def __reversed__(self):
+        """
+        Example:
+            >>> list(reversed(OrderedSet([1, 2, 3])))
+            [3, 2, 1]
+        """
+        return reversed(self.items)
+
+    def __repr__(self):
+        if not self:
+            return "%s()" % (self.__class__.__name__,)
+        return "%s(%r)" % (self.__class__.__name__, list(self))
+
+    def __eq__(self, other):
+        """
+        Returns true if the containers have the same items. If `other` is a
+        Sequence, then order is checked, otherwise it is ignored.
+
+        Example:
+            >>> oset = OrderedSet([1, 3, 2])
+            >>> oset == [1, 3, 2]
+            True
+            >>> oset == [1, 2, 3]
+            False
+            >>> oset == [2, 3]
+            False
+            >>> oset == OrderedSet([3, 2, 1])
+            False
+        """
+        # In Python 2 deque is not a Sequence, so treat it as one for
+        # consistent behavior with Python 3.
+        if isinstance(other, (Sequence, deque)):
+            # Check that this OrderedSet contains the same elements, in the
+            # same order, as the other object.
+            return list(self) == list(other)
+        try:
+            other_as_set = set(other)
+        except TypeError:
+            # If `other` can't be converted into a set, it's not equal.
+            return False
+        else:
+            return set(self) == other_as_set
+
+    def union(self, *sets):
+        """
+        Combines all unique items.
+        Each items order is defined by its first appearance.
+
+        Example:
+            >>> oset = OrderedSet.union(OrderedSet([3, 1, 4, 1, 5]), [1, 3], [2, 0])
+            >>> print(oset)
+            OrderedSet([3, 1, 4, 5, 2, 0])
+            >>> oset.union([8, 9])
+            OrderedSet([3, 1, 4, 5, 2, 0, 8, 9])
+            >>> oset | {10}
+            OrderedSet([3, 1, 4, 5, 2, 0, 10])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        containers = map(list, it.chain([self], sets))
+        items = it.chain.from_iterable(containers)
+        return cls(items)
+
+    def __and__(self, other):
+        # the parent implementation of this is backwards
+        return self.intersection(other)
+
+    def intersection(self, *sets):
+        """
+        Returns elements in common between all sets. Order is defined only
+        by the first set.
+
+        Example:
+            >>> oset = OrderedSet.intersection(OrderedSet([0, 1, 2, 3]), [1, 2, 3])
+            >>> print(oset)
+            OrderedSet([1, 2, 3])
+            >>> oset.intersection([2, 4, 5], [1, 2, 3, 4])
+            OrderedSet([2])
+            >>> oset.intersection()
+            OrderedSet([1, 2, 3])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        if sets:
+            common = set.intersection(*map(set, sets))
+            items = (item for item in self if item in common)
+        else:
+            items = self
+        return cls(items)
+
+    def difference(self, *sets):
+        """
+        Returns all elements that are in this set but not the others.
+
+        Example:
+            >>> OrderedSet([1, 2, 3]).difference(OrderedSet([2]))
+            OrderedSet([1, 3])
+            >>> OrderedSet([1, 2, 3]).difference(OrderedSet([2]), OrderedSet([3]))
+            OrderedSet([1])
+            >>> OrderedSet([1, 2, 3]) - OrderedSet([2])
+            OrderedSet([1, 3])
+            >>> OrderedSet([1, 2, 3]).difference()
+            OrderedSet([1, 2, 3])
+        """
+        cls = self.__class__
+        if sets:
+            other = set.union(*map(set, sets))
+            items = (item for item in self if item not in other)
+        else:
+            items = self
+        return cls(items)
+
+    def issubset(self, other):
+        """
+        Report whether another set contains this set.
+
+        Example:
+            >>> OrderedSet([1, 2, 3]).issubset({1, 2})
+            False
+            >>> OrderedSet([1, 2, 3]).issubset({1, 2, 3, 4})
+            True
+            >>> OrderedSet([1, 2, 3]).issubset({1, 4, 3, 5})
+            False
+        """
+        if len(self) > len(other):  # Fast check for obvious cases
+            return False
+        return all(item in other for item in self)
+
+    def issuperset(self, other):
+        """
+        Report whether this set contains another set.
+
+        Example:
+            >>> OrderedSet([1, 2]).issuperset([1, 2, 3])
+            False
+            >>> OrderedSet([1, 2, 3, 4]).issuperset({1, 2, 3})
+            True
+            >>> OrderedSet([1, 4, 3, 5]).issuperset({1, 2, 3})
+            False
+        """
+        if len(self) < len(other):  # Fast check for obvious cases
+            return False
+        return all(item in self for item in other)
+
+    def symmetric_difference(self, other):
+        """
+        Return the symmetric difference of two OrderedSets as a new set.
+        That is, the new set will contain all elements that are in exactly
+        one of the sets.
+
+        Their order will be preserved, with elements from `self` preceding
+        elements from `other`.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.symmetric_difference(other)
+            OrderedSet([4, 5, 9, 2])
+        """
+        cls = self.__class__ if isinstance(self, OrderedSet) else OrderedSet
+        diff1 = cls(self).difference(other)
+        diff2 = cls(other).difference(self)
+        return diff1.union(diff2)
+
+    def _update_items(self, items):
+        """
+        Replace the 'items' list of this OrderedSet with a new one, updating
+        self.map accordingly.
+        """
+        self.items = items
+        self.map = {item: idx for (idx, item) in enumerate(items)}
+
+    def difference_update(self, *sets):
+        """
+        Update this OrderedSet to remove items from one or more other sets.
+
+        Example:
+            >>> this = OrderedSet([1, 2, 3])
+            >>> this.difference_update(OrderedSet([2, 4]))
+            >>> print(this)
+            OrderedSet([1, 3])
+
+            >>> this = OrderedSet([1, 2, 3, 4, 5])
+            >>> this.difference_update(OrderedSet([2, 4]), OrderedSet([1, 4, 6]))
+            >>> print(this)
+            OrderedSet([3, 5])
+        """
+        items_to_remove = set()
+        for other in sets:
+            items_to_remove |= set(other)
+        self._update_items([item for item in self.items if item not in items_to_remove])
+
+    def intersection_update(self, other):
+        """
+        Update this OrderedSet to keep only items in another set, preserving
+        their order in this set.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.intersection_update(other)
+            >>> print(this)
+            OrderedSet([1, 3, 7])
+        """
+        other = set(other)
+        self._update_items([item for item in self.items if item in other])
+
+    def symmetric_difference_update(self, other):
+        """
+        Update this OrderedSet to remove items from another set, then
+        add items from the other set that were not present in this set.
+
+        Example:
+            >>> this = OrderedSet([1, 4, 3, 5, 7])
+            >>> other = OrderedSet([9, 7, 1, 3, 2])
+            >>> this.symmetric_difference_update(other)
+            >>> print(this)
+            OrderedSet([4, 5, 9, 2])
+        """
+        items_to_add = [item for item in other if item not in self]
+        items_to_remove = set(other)
+        self._update_items(
+            [item for item in self.items if item not in items_to_remove] + items_to_add
+        )
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__about__.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__about__.py
new file mode 100644
index 0000000..dc95138
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__about__.py
@@ -0,0 +1,27 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
+
+__title__ = "packaging"
+__summary__ = "Core utilities for Python packages"
+__uri__ = "https://github.com/pypa/packaging"
+
+__version__ = "19.2"
+
+__author__ = "Donald Stufft and individual contributors"
+__email__ = "donald@stufft.io"
+
+__license__ = "BSD or Apache License, Version 2.0"
+__copyright__ = "Copyright 2014-2019 %s" % __author__
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__init__.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__init__.py
new file mode 100644
index 0000000..a0cf67d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__init__.py
@@ -0,0 +1,26 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+from .__about__ import (
+    __author__,
+    __copyright__,
+    __email__,
+    __license__,
+    __summary__,
+    __title__,
+    __uri__,
+    __version__,
+)
+
+__all__ = [
+    "__title__",
+    "__summary__",
+    "__uri__",
+    "__version__",
+    "__author__",
+    "__email__",
+    "__license__",
+    "__copyright__",
+]
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/__about__.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/__about__.cpython-39.pyc
new file mode 100644
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new file mode 100644
index 0000000..1c11cf7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-39.pyc
new file mode 100644
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+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_compat.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
new file mode 100644
index 0000000..9c6ebe1
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+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/_structures.cpython-39.pyc
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diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-39.pyc
new file mode 100644
index 0000000..378b791
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/markers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
new file mode 100644
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--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/requirements.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
new file mode 100644
index 0000000..3bb04b3
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/specifiers.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/tags.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/tags.cpython-39.pyc
new file mode 100644
index 0000000..92532cc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/tags.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-39.pyc
new file mode 100644
index 0000000..01c8012
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/utils.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-39.pyc
new file mode 100644
index 0000000..fbf0cae
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/__pycache__/version.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_compat.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_compat.py
new file mode 100644
index 0000000..25da473
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_compat.py
@@ -0,0 +1,31 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import sys
+
+
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+
+# flake8: noqa
+
+if PY3:
+    string_types = (str,)
+else:
+    string_types = (basestring,)
+
+
+def with_metaclass(meta, *bases):
+    """
+    Create a base class with a metaclass.
+    """
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+
+    return type.__new__(metaclass, "temporary_class", (), {})
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_structures.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_structures.py
new file mode 100644
index 0000000..68dcca6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/_structures.py
@@ -0,0 +1,68 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+
+class Infinity(object):
+    def __repr__(self):
+        return "Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return False
+
+    def __le__(self, other):
+        return False
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return True
+
+    def __ge__(self, other):
+        return True
+
+    def __neg__(self):
+        return NegativeInfinity
+
+
+Infinity = Infinity()
+
+
+class NegativeInfinity(object):
+    def __repr__(self):
+        return "-Infinity"
+
+    def __hash__(self):
+        return hash(repr(self))
+
+    def __lt__(self, other):
+        return True
+
+    def __le__(self, other):
+        return True
+
+    def __eq__(self, other):
+        return isinstance(other, self.__class__)
+
+    def __ne__(self, other):
+        return not isinstance(other, self.__class__)
+
+    def __gt__(self, other):
+        return False
+
+    def __ge__(self, other):
+        return False
+
+    def __neg__(self):
+        return Infinity
+
+
+NegativeInfinity = NegativeInfinity()
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/markers.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/markers.py
new file mode 100644
index 0000000..4bdfdb2
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/markers.py
@@ -0,0 +1,296 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import operator
+import os
+import platform
+import sys
+
+from setuptools.extern.pyparsing import ParseException, ParseResults, stringStart, stringEnd
+from setuptools.extern.pyparsing import ZeroOrMore, Group, Forward, QuotedString
+from setuptools.extern.pyparsing import Literal as L  # noqa
+
+from ._compat import string_types
+from .specifiers import Specifier, InvalidSpecifier
+
+
+__all__ = [
+    "InvalidMarker",
+    "UndefinedComparison",
+    "UndefinedEnvironmentName",
+    "Marker",
+    "default_environment",
+]
+
+
+class InvalidMarker(ValueError):
+    """
+    An invalid marker was found, users should refer to PEP 508.
+    """
+
+
+class UndefinedComparison(ValueError):
+    """
+    An invalid operation was attempted on a value that doesn't support it.
+    """
+
+
+class UndefinedEnvironmentName(ValueError):
+    """
+    A name was attempted to be used that does not exist inside of the
+    environment.
+    """
+
+
+class Node(object):
+    def __init__(self, value):
+        self.value = value
+
+    def __str__(self):
+        return str(self.value)
+
+    def __repr__(self):
+        return "<{0}({1!r})>".format(self.__class__.__name__, str(self))
+
+    def serialize(self):
+        raise NotImplementedError
+
+
+class Variable(Node):
+    def serialize(self):
+        return str(self)
+
+
+class Value(Node):
+    def serialize(self):
+        return '"{0}"'.format(self)
+
+
+class Op(Node):
+    def serialize(self):
+        return str(self)
+
+
+VARIABLE = (
+    L("implementation_version")
+    | L("platform_python_implementation")
+    | L("implementation_name")
+    | L("python_full_version")
+    | L("platform_release")
+    | L("platform_version")
+    | L("platform_machine")
+    | L("platform_system")
+    | L("python_version")
+    | L("sys_platform")
+    | L("os_name")
+    | L("os.name")
+    | L("sys.platform")  # PEP-345
+    | L("platform.version")  # PEP-345
+    | L("platform.machine")  # PEP-345
+    | L("platform.python_implementation")  # PEP-345
+    | L("python_implementation")  # PEP-345
+    | L("extra")  # undocumented setuptools legacy
+)
+ALIASES = {
+    "os.name": "os_name",
+    "sys.platform": "sys_platform",
+    "platform.version": "platform_version",
+    "platform.machine": "platform_machine",
+    "platform.python_implementation": "platform_python_implementation",
+    "python_implementation": "platform_python_implementation",
+}
+VARIABLE.setParseAction(lambda s, l, t: Variable(ALIASES.get(t[0], t[0])))
+
+VERSION_CMP = (
+    L("===") | L("==") | L(">=") | L("<=") | L("!=") | L("~=") | L(">") | L("<")
+)
+
+MARKER_OP = VERSION_CMP | L("not in") | L("in")
+MARKER_OP.setParseAction(lambda s, l, t: Op(t[0]))
+
+MARKER_VALUE = QuotedString("'") | QuotedString('"')
+MARKER_VALUE.setParseAction(lambda s, l, t: Value(t[0]))
+
+BOOLOP = L("and") | L("or")
+
+MARKER_VAR = VARIABLE | MARKER_VALUE
+
+MARKER_ITEM = Group(MARKER_VAR + MARKER_OP + MARKER_VAR)
+MARKER_ITEM.setParseAction(lambda s, l, t: tuple(t[0]))
+
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+
+MARKER_EXPR = Forward()
+MARKER_ATOM = MARKER_ITEM | Group(LPAREN + MARKER_EXPR + RPAREN)
+MARKER_EXPR << MARKER_ATOM + ZeroOrMore(BOOLOP + MARKER_EXPR)
+
+MARKER = stringStart + MARKER_EXPR + stringEnd
+
+
+def _coerce_parse_result(results):
+    if isinstance(results, ParseResults):
+        return [_coerce_parse_result(i) for i in results]
+    else:
+        return results
+
+
+def _format_marker(marker, first=True):
+    assert isinstance(marker, (list, tuple, string_types))
+
+    # Sometimes we have a structure like [[...]] which is a single item list
+    # where the single item is itself it's own list. In that case we want skip
+    # the rest of this function so that we don't get extraneous () on the
+    # outside.
+    if (
+        isinstance(marker, list)
+        and len(marker) == 1
+        and isinstance(marker[0], (list, tuple))
+    ):
+        return _format_marker(marker[0])
+
+    if isinstance(marker, list):
+        inner = (_format_marker(m, first=False) for m in marker)
+        if first:
+            return " ".join(inner)
+        else:
+            return "(" + " ".join(inner) + ")"
+    elif isinstance(marker, tuple):
+        return " ".join([m.serialize() for m in marker])
+    else:
+        return marker
+
+
+_operators = {
+    "in": lambda lhs, rhs: lhs in rhs,
+    "not in": lambda lhs, rhs: lhs not in rhs,
+    "<": operator.lt,
+    "<=": operator.le,
+    "==": operator.eq,
+    "!=": operator.ne,
+    ">=": operator.ge,
+    ">": operator.gt,
+}
+
+
+def _eval_op(lhs, op, rhs):
+    try:
+        spec = Specifier("".join([op.serialize(), rhs]))
+    except InvalidSpecifier:
+        pass
+    else:
+        return spec.contains(lhs)
+
+    oper = _operators.get(op.serialize())
+    if oper is None:
+        raise UndefinedComparison(
+            "Undefined {0!r} on {1!r} and {2!r}.".format(op, lhs, rhs)
+        )
+
+    return oper(lhs, rhs)
+
+
+_undefined = object()
+
+
+def _get_env(environment, name):
+    value = environment.get(name, _undefined)
+
+    if value is _undefined:
+        raise UndefinedEnvironmentName(
+            "{0!r} does not exist in evaluation environment.".format(name)
+        )
+
+    return value
+
+
+def _evaluate_markers(markers, environment):
+    groups = [[]]
+
+    for marker in markers:
+        assert isinstance(marker, (list, tuple, string_types))
+
+        if isinstance(marker, list):
+            groups[-1].append(_evaluate_markers(marker, environment))
+        elif isinstance(marker, tuple):
+            lhs, op, rhs = marker
+
+            if isinstance(lhs, Variable):
+                lhs_value = _get_env(environment, lhs.value)
+                rhs_value = rhs.value
+            else:
+                lhs_value = lhs.value
+                rhs_value = _get_env(environment, rhs.value)
+
+            groups[-1].append(_eval_op(lhs_value, op, rhs_value))
+        else:
+            assert marker in ["and", "or"]
+            if marker == "or":
+                groups.append([])
+
+    return any(all(item) for item in groups)
+
+
+def format_full_version(info):
+    version = "{0.major}.{0.minor}.{0.micro}".format(info)
+    kind = info.releaselevel
+    if kind != "final":
+        version += kind[0] + str(info.serial)
+    return version
+
+
+def default_environment():
+    if hasattr(sys, "implementation"):
+        iver = format_full_version(sys.implementation.version)
+        implementation_name = sys.implementation.name
+    else:
+        iver = "0"
+        implementation_name = ""
+
+    return {
+        "implementation_name": implementation_name,
+        "implementation_version": iver,
+        "os_name": os.name,
+        "platform_machine": platform.machine(),
+        "platform_release": platform.release(),
+        "platform_system": platform.system(),
+        "platform_version": platform.version(),
+        "python_full_version": platform.python_version(),
+        "platform_python_implementation": platform.python_implementation(),
+        "python_version": ".".join(platform.python_version_tuple()[:2]),
+        "sys_platform": sys.platform,
+    }
+
+
+class Marker(object):
+    def __init__(self, marker):
+        try:
+            self._markers = _coerce_parse_result(MARKER.parseString(marker))
+        except ParseException as e:
+            err_str = "Invalid marker: {0!r}, parse error at {1!r}".format(
+                marker, marker[e.loc : e.loc + 8]
+            )
+            raise InvalidMarker(err_str)
+
+    def __str__(self):
+        return _format_marker(self._markers)
+
+    def __repr__(self):
+        return "<Marker({0!r})>".format(str(self))
+
+    def evaluate(self, environment=None):
+        """Evaluate a marker.
+
+        Return the boolean from evaluating the given marker against the
+        environment. environment is an optional argument to override all or
+        part of the determined environment.
+
+        The environment is determined from the current Python process.
+        """
+        current_environment = default_environment()
+        if environment is not None:
+            current_environment.update(environment)
+
+        return _evaluate_markers(self._markers, current_environment)
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/requirements.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/requirements.py
new file mode 100644
index 0000000..8a0c2cb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/requirements.py
@@ -0,0 +1,138 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import string
+import re
+
+from setuptools.extern.pyparsing import stringStart, stringEnd, originalTextFor, ParseException
+from setuptools.extern.pyparsing import ZeroOrMore, Word, Optional, Regex, Combine
+from setuptools.extern.pyparsing import Literal as L  # noqa
+from setuptools.extern.six.moves.urllib import parse as urlparse
+
+from .markers import MARKER_EXPR, Marker
+from .specifiers import LegacySpecifier, Specifier, SpecifierSet
+
+
+class InvalidRequirement(ValueError):
+    """
+    An invalid requirement was found, users should refer to PEP 508.
+    """
+
+
+ALPHANUM = Word(string.ascii_letters + string.digits)
+
+LBRACKET = L("[").suppress()
+RBRACKET = L("]").suppress()
+LPAREN = L("(").suppress()
+RPAREN = L(")").suppress()
+COMMA = L(",").suppress()
+SEMICOLON = L(";").suppress()
+AT = L("@").suppress()
+
+PUNCTUATION = Word("-_.")
+IDENTIFIER_END = ALPHANUM | (ZeroOrMore(PUNCTUATION) + ALPHANUM)
+IDENTIFIER = Combine(ALPHANUM + ZeroOrMore(IDENTIFIER_END))
+
+NAME = IDENTIFIER("name")
+EXTRA = IDENTIFIER
+
+URI = Regex(r"[^ ]+")("url")
+URL = AT + URI
+
+EXTRAS_LIST = EXTRA + ZeroOrMore(COMMA + EXTRA)
+EXTRAS = (LBRACKET + Optional(EXTRAS_LIST) + RBRACKET)("extras")
+
+VERSION_PEP440 = Regex(Specifier._regex_str, re.VERBOSE | re.IGNORECASE)
+VERSION_LEGACY = Regex(LegacySpecifier._regex_str, re.VERBOSE | re.IGNORECASE)
+
+VERSION_ONE = VERSION_PEP440 ^ VERSION_LEGACY
+VERSION_MANY = Combine(
+    VERSION_ONE + ZeroOrMore(COMMA + VERSION_ONE), joinString=",", adjacent=False
+)("_raw_spec")
+_VERSION_SPEC = Optional(((LPAREN + VERSION_MANY + RPAREN) | VERSION_MANY))
+_VERSION_SPEC.setParseAction(lambda s, l, t: t._raw_spec or "")
+
+VERSION_SPEC = originalTextFor(_VERSION_SPEC)("specifier")
+VERSION_SPEC.setParseAction(lambda s, l, t: t[1])
+
+MARKER_EXPR = originalTextFor(MARKER_EXPR())("marker")
+MARKER_EXPR.setParseAction(
+    lambda s, l, t: Marker(s[t._original_start : t._original_end])
+)
+MARKER_SEPARATOR = SEMICOLON
+MARKER = MARKER_SEPARATOR + MARKER_EXPR
+
+VERSION_AND_MARKER = VERSION_SPEC + Optional(MARKER)
+URL_AND_MARKER = URL + Optional(MARKER)
+
+NAMED_REQUIREMENT = NAME + Optional(EXTRAS) + (URL_AND_MARKER | VERSION_AND_MARKER)
+
+REQUIREMENT = stringStart + NAMED_REQUIREMENT + stringEnd
+# setuptools.extern.pyparsing isn't thread safe during initialization, so we do it eagerly, see
+# issue #104
+REQUIREMENT.parseString("x[]")
+
+
+class Requirement(object):
+    """Parse a requirement.
+
+    Parse a given requirement string into its parts, such as name, specifier,
+    URL, and extras. Raises InvalidRequirement on a badly-formed requirement
+    string.
+    """
+
+    # TODO: Can we test whether something is contained within a requirement?
+    #       If so how do we do that? Do we need to test against the _name_ of
+    #       the thing as well as the version? What about the markers?
+    # TODO: Can we normalize the name and extra name?
+
+    def __init__(self, requirement_string):
+        try:
+            req = REQUIREMENT.parseString(requirement_string)
+        except ParseException as e:
+            raise InvalidRequirement(
+                'Parse error at "{0!r}": {1}'.format(
+                    requirement_string[e.loc : e.loc + 8], e.msg
+                )
+            )
+
+        self.name = req.name
+        if req.url:
+            parsed_url = urlparse.urlparse(req.url)
+            if parsed_url.scheme == "file":
+                if urlparse.urlunparse(parsed_url) != req.url:
+                    raise InvalidRequirement("Invalid URL given")
+            elif not (parsed_url.scheme and parsed_url.netloc) or (
+                not parsed_url.scheme and not parsed_url.netloc
+            ):
+                raise InvalidRequirement("Invalid URL: {0}".format(req.url))
+            self.url = req.url
+        else:
+            self.url = None
+        self.extras = set(req.extras.asList() if req.extras else [])
+        self.specifier = SpecifierSet(req.specifier)
+        self.marker = req.marker if req.marker else None
+
+    def __str__(self):
+        parts = [self.name]
+
+        if self.extras:
+            parts.append("[{0}]".format(",".join(sorted(self.extras))))
+
+        if self.specifier:
+            parts.append(str(self.specifier))
+
+        if self.url:
+            parts.append("@ {0}".format(self.url))
+            if self.marker:
+                parts.append(" ")
+
+        if self.marker:
+            parts.append("; {0}".format(self.marker))
+
+        return "".join(parts)
+
+    def __repr__(self):
+        return "<Requirement({0!r})>".format(str(self))
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/specifiers.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/specifiers.py
new file mode 100644
index 0000000..743576a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/specifiers.py
@@ -0,0 +1,749 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import abc
+import functools
+import itertools
+import re
+
+from ._compat import string_types, with_metaclass
+from .version import Version, LegacyVersion, parse
+
+
+class InvalidSpecifier(ValueError):
+    """
+    An invalid specifier was found, users should refer to PEP 440.
+    """
+
+
+class BaseSpecifier(with_metaclass(abc.ABCMeta, object)):
+    @abc.abstractmethod
+    def __str__(self):
+        """
+        Returns the str representation of this Specifier like object. This
+        should be representative of the Specifier itself.
+        """
+
+    @abc.abstractmethod
+    def __hash__(self):
+        """
+        Returns a hash value for this Specifier like object.
+        """
+
+    @abc.abstractmethod
+    def __eq__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are equal.
+        """
+
+    @abc.abstractmethod
+    def __ne__(self, other):
+        """
+        Returns a boolean representing whether or not the two Specifier like
+        objects are not equal.
+        """
+
+    @abc.abstractproperty
+    def prereleases(self):
+        """
+        Returns whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @prereleases.setter
+    def prereleases(self, value):
+        """
+        Sets whether or not pre-releases as a whole are allowed by this
+        specifier.
+        """
+
+    @abc.abstractmethod
+    def contains(self, item, prereleases=None):
+        """
+        Determines if the given item is contained within this specifier.
+        """
+
+    @abc.abstractmethod
+    def filter(self, iterable, prereleases=None):
+        """
+        Takes an iterable of items and filters them so that only items which
+        are contained within this specifier are allowed in it.
+        """
+
+
+class _IndividualSpecifier(BaseSpecifier):
+
+    _operators = {}
+
+    def __init__(self, spec="", prereleases=None):
+        match = self._regex.search(spec)
+        if not match:
+            raise InvalidSpecifier("Invalid specifier: '{0}'".format(spec))
+
+        self._spec = (match.group("operator").strip(), match.group("version").strip())
+
+        # Store whether or not this Specifier should accept prereleases
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<{0}({1!r}{2})>".format(self.__class__.__name__, str(self), pre)
+
+    def __str__(self):
+        return "{0}{1}".format(*self._spec)
+
+    def __hash__(self):
+        return hash(self._spec)
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec == other._spec
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            try:
+                other = self.__class__(other)
+            except InvalidSpecifier:
+                return NotImplemented
+        elif not isinstance(other, self.__class__):
+            return NotImplemented
+
+        return self._spec != other._spec
+
+    def _get_operator(self, op):
+        return getattr(self, "_compare_{0}".format(self._operators[op]))
+
+    def _coerce_version(self, version):
+        if not isinstance(version, (LegacyVersion, Version)):
+            version = parse(version)
+        return version
+
+    @property
+    def operator(self):
+        return self._spec[0]
+
+    @property
+    def version(self):
+        return self._spec[1]
+
+    @property
+    def prereleases(self):
+        return self._prereleases
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Determine if prereleases are to be allowed or not.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # Normalize item to a Version or LegacyVersion, this allows us to have
+        # a shortcut for ``"2.0" in Specifier(">=2")
+        item = self._coerce_version(item)
+
+        # Determine if we should be supporting prereleases in this specifier
+        # or not, if we do not support prereleases than we can short circuit
+        # logic if this version is a prereleases.
+        if item.is_prerelease and not prereleases:
+            return False
+
+        # Actually do the comparison to determine if this item is contained
+        # within this Specifier or not.
+        return self._get_operator(self.operator)(item, self.version)
+
+    def filter(self, iterable, prereleases=None):
+        yielded = False
+        found_prereleases = []
+
+        kw = {"prereleases": prereleases if prereleases is not None else True}
+
+        # Attempt to iterate over all the values in the iterable and if any of
+        # them match, yield them.
+        for version in iterable:
+            parsed_version = self._coerce_version(version)
+
+            if self.contains(parsed_version, **kw):
+                # If our version is a prerelease, and we were not set to allow
+                # prereleases, then we'll store it for later incase nothing
+                # else matches this specifier.
+                if parsed_version.is_prerelease and not (
+                    prereleases or self.prereleases
+                ):
+                    found_prereleases.append(version)
+                # Either this is not a prerelease, or we should have been
+                # accepting prereleases from the beginning.
+                else:
+                    yielded = True
+                    yield version
+
+        # Now that we've iterated over everything, determine if we've yielded
+        # any values, and if we have not and we have any prereleases stored up
+        # then we will go ahead and yield the prereleases.
+        if not yielded and found_prereleases:
+            for version in found_prereleases:
+                yield version
+
+
+class LegacySpecifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(==|!=|<=|>=|<|>))
+        \s*
+        (?P<version>
+            [^,;\s)]* # Since this is a "legacy" specifier, and the version
+                      # string can be just about anything, we match everything
+                      # except for whitespace, a semi-colon for marker support,
+                      # a closing paren since versions can be enclosed in
+                      # them, and a comma since it's a version separator.
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+    }
+
+    def _coerce_version(self, version):
+        if not isinstance(version, LegacyVersion):
+            version = LegacyVersion(str(version))
+        return version
+
+    def _compare_equal(self, prospective, spec):
+        return prospective == self._coerce_version(spec)
+
+    def _compare_not_equal(self, prospective, spec):
+        return prospective != self._coerce_version(spec)
+
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= self._coerce_version(spec)
+
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= self._coerce_version(spec)
+
+    def _compare_less_than(self, prospective, spec):
+        return prospective < self._coerce_version(spec)
+
+    def _compare_greater_than(self, prospective, spec):
+        return prospective > self._coerce_version(spec)
+
+
+def _require_version_compare(fn):
+    @functools.wraps(fn)
+    def wrapped(self, prospective, spec):
+        if not isinstance(prospective, Version):
+            return False
+        return fn(self, prospective, spec)
+
+    return wrapped
+
+
+class Specifier(_IndividualSpecifier):
+
+    _regex_str = r"""
+        (?P<operator>(~=|==|!=|<=|>=|<|>|===))
+        (?P<version>
+            (?:
+                # The identity operators allow for an escape hatch that will
+                # do an exact string match of the version you wish to install.
+                # This will not be parsed by PEP 440 and we cannot determine
+                # any semantic meaning from it. This operator is discouraged
+                # but included entirely as an escape hatch.
+                (?<====)  # Only match for the identity operator
+                \s*
+                [^\s]*    # We just match everything, except for whitespace
+                          # since we are only testing for strict identity.
+            )
+            |
+            (?:
+                # The (non)equality operators allow for wild card and local
+                # versions to be specified so we have to define these two
+                # operators separately to enable that.
+                (?<===|!=)            # Only match for equals and not equals
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+
+                # You cannot use a wild card and a dev or local version
+                # together so group them with a | and make them optional.
+                (?:
+                    (?:[-_\.]?dev[-_\.]?[0-9]*)?         # dev release
+                    (?:\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*)? # local
+                    |
+                    \.\*  # Wild card syntax of .*
+                )?
+            )
+            |
+            (?:
+                # The compatible operator requires at least two digits in the
+                # release segment.
+                (?<=~=)               # Only match for the compatible operator
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)+   # release  (We have a + instead of a *)
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+            |
+            (?:
+                # All other operators only allow a sub set of what the
+                # (non)equality operators do. Specifically they do not allow
+                # local versions to be specified nor do they allow the prefix
+                # matching wild cards.
+                (?<!==|!=|~=)         # We have special cases for these
+                                      # operators so we want to make sure they
+                                      # don't match here.
+
+                \s*
+                v?
+                (?:[0-9]+!)?          # epoch
+                [0-9]+(?:\.[0-9]+)*   # release
+                (?:                   # pre release
+                    [-_\.]?
+                    (a|b|c|rc|alpha|beta|pre|preview)
+                    [-_\.]?
+                    [0-9]*
+                )?
+                (?:                                   # post release
+                    (?:-[0-9]+)|(?:[-_\.]?(post|rev|r)[-_\.]?[0-9]*)
+                )?
+                (?:[-_\.]?dev[-_\.]?[0-9]*)?          # dev release
+            )
+        )
+        """
+
+    _regex = re.compile(r"^\s*" + _regex_str + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    _operators = {
+        "~=": "compatible",
+        "==": "equal",
+        "!=": "not_equal",
+        "<=": "less_than_equal",
+        ">=": "greater_than_equal",
+        "<": "less_than",
+        ">": "greater_than",
+        "===": "arbitrary",
+    }
+
+    @_require_version_compare
+    def _compare_compatible(self, prospective, spec):
+        # Compatible releases have an equivalent combination of >= and ==. That
+        # is that ~=2.2 is equivalent to >=2.2,==2.*. This allows us to
+        # implement this in terms of the other specifiers instead of
+        # implementing it ourselves. The only thing we need to do is construct
+        # the other specifiers.
+
+        # We want everything but the last item in the version, but we want to
+        # ignore post and dev releases and we want to treat the pre-release as
+        # it's own separate segment.
+        prefix = ".".join(
+            list(
+                itertools.takewhile(
+                    lambda x: (not x.startswith("post") and not x.startswith("dev")),
+                    _version_split(spec),
+                )
+            )[:-1]
+        )
+
+        # Add the prefix notation to the end of our string
+        prefix += ".*"
+
+        return self._get_operator(">=")(prospective, spec) and self._get_operator("==")(
+            prospective, prefix
+        )
+
+    @_require_version_compare
+    def _compare_equal(self, prospective, spec):
+        # We need special logic to handle prefix matching
+        if spec.endswith(".*"):
+            # In the case of prefix matching we want to ignore local segment.
+            prospective = Version(prospective.public)
+            # Split the spec out by dots, and pretend that there is an implicit
+            # dot in between a release segment and a pre-release segment.
+            spec = _version_split(spec[:-2])  # Remove the trailing .*
+
+            # Split the prospective version out by dots, and pretend that there
+            # is an implicit dot in between a release segment and a pre-release
+            # segment.
+            prospective = _version_split(str(prospective))
+
+            # Shorten the prospective version to be the same length as the spec
+            # so that we can determine if the specifier is a prefix of the
+            # prospective version or not.
+            prospective = prospective[: len(spec)]
+
+            # Pad out our two sides with zeros so that they both equal the same
+            # length.
+            spec, prospective = _pad_version(spec, prospective)
+        else:
+            # Convert our spec string into a Version
+            spec = Version(spec)
+
+            # If the specifier does not have a local segment, then we want to
+            # act as if the prospective version also does not have a local
+            # segment.
+            if not spec.local:
+                prospective = Version(prospective.public)
+
+        return prospective == spec
+
+    @_require_version_compare
+    def _compare_not_equal(self, prospective, spec):
+        return not self._compare_equal(prospective, spec)
+
+    @_require_version_compare
+    def _compare_less_than_equal(self, prospective, spec):
+        return prospective <= Version(spec)
+
+    @_require_version_compare
+    def _compare_greater_than_equal(self, prospective, spec):
+        return prospective >= Version(spec)
+
+    @_require_version_compare
+    def _compare_less_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is less than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective < spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a pre-release version, that we do not accept pre-release
+        # versions for the version mentioned in the specifier (e.g. <3.1 should
+        # not match 3.1.dev0, but should match 3.0.dev0).
+        if not spec.is_prerelease and prospective.is_prerelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # less than the spec version *and* it's not a pre-release of the same
+        # version in the spec.
+        return True
+
+    @_require_version_compare
+    def _compare_greater_than(self, prospective, spec):
+        # Convert our spec to a Version instance, since we'll want to work with
+        # it as a version.
+        spec = Version(spec)
+
+        # Check to see if the prospective version is greater than the spec
+        # version. If it's not we can short circuit and just return False now
+        # instead of doing extra unneeded work.
+        if not prospective > spec:
+            return False
+
+        # This special case is here so that, unless the specifier itself
+        # includes is a post-release version, that we do not accept
+        # post-release versions for the version mentioned in the specifier
+        # (e.g. >3.1 should not match 3.0.post0, but should match 3.2.post0).
+        if not spec.is_postrelease and prospective.is_postrelease:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # Ensure that we do not allow a local version of the version mentioned
+        # in the specifier, which is technically greater than, to match.
+        if prospective.local is not None:
+            if Version(prospective.base_version) == Version(spec.base_version):
+                return False
+
+        # If we've gotten to here, it means that prospective version is both
+        # greater than the spec version *and* it's not a pre-release of the
+        # same version in the spec.
+        return True
+
+    def _compare_arbitrary(self, prospective, spec):
+        return str(prospective).lower() == str(spec).lower()
+
+    @property
+    def prereleases(self):
+        # If there is an explicit prereleases set for this, then we'll just
+        # blindly use that.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # Look at all of our specifiers and determine if they are inclusive
+        # operators, and if they are if they are including an explicit
+        # prerelease.
+        operator, version = self._spec
+        if operator in ["==", ">=", "<=", "~=", "==="]:
+            # The == specifier can include a trailing .*, if it does we
+            # want to remove before parsing.
+            if operator == "==" and version.endswith(".*"):
+                version = version[:-2]
+
+            # Parse the version, and if it is a pre-release than this
+            # specifier allows pre-releases.
+            if parse(version).is_prerelease:
+                return True
+
+        return False
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+
+_prefix_regex = re.compile(r"^([0-9]+)((?:a|b|c|rc)[0-9]+)$")
+
+
+def _version_split(version):
+    result = []
+    for item in version.split("."):
+        match = _prefix_regex.search(item)
+        if match:
+            result.extend(match.groups())
+        else:
+            result.append(item)
+    return result
+
+
+def _pad_version(left, right):
+    left_split, right_split = [], []
+
+    # Get the release segment of our versions
+    left_split.append(list(itertools.takewhile(lambda x: x.isdigit(), left)))
+    right_split.append(list(itertools.takewhile(lambda x: x.isdigit(), right)))
+
+    # Get the rest of our versions
+    left_split.append(left[len(left_split[0]) :])
+    right_split.append(right[len(right_split[0]) :])
+
+    # Insert our padding
+    left_split.insert(1, ["0"] * max(0, len(right_split[0]) - len(left_split[0])))
+    right_split.insert(1, ["0"] * max(0, len(left_split[0]) - len(right_split[0])))
+
+    return (list(itertools.chain(*left_split)), list(itertools.chain(*right_split)))
+
+
+class SpecifierSet(BaseSpecifier):
+    def __init__(self, specifiers="", prereleases=None):
+        # Split on , to break each indidivual specifier into it's own item, and
+        # strip each item to remove leading/trailing whitespace.
+        specifiers = [s.strip() for s in specifiers.split(",") if s.strip()]
+
+        # Parsed each individual specifier, attempting first to make it a
+        # Specifier and falling back to a LegacySpecifier.
+        parsed = set()
+        for specifier in specifiers:
+            try:
+                parsed.add(Specifier(specifier))
+            except InvalidSpecifier:
+                parsed.add(LegacySpecifier(specifier))
+
+        # Turn our parsed specifiers into a frozen set and save them for later.
+        self._specs = frozenset(parsed)
+
+        # Store our prereleases value so we can use it later to determine if
+        # we accept prereleases or not.
+        self._prereleases = prereleases
+
+    def __repr__(self):
+        pre = (
+            ", prereleases={0!r}".format(self.prereleases)
+            if self._prereleases is not None
+            else ""
+        )
+
+        return "<SpecifierSet({0!r}{1})>".format(str(self), pre)
+
+    def __str__(self):
+        return ",".join(sorted(str(s) for s in self._specs))
+
+    def __hash__(self):
+        return hash(self._specs)
+
+    def __and__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        specifier = SpecifierSet()
+        specifier._specs = frozenset(self._specs | other._specs)
+
+        if self._prereleases is None and other._prereleases is not None:
+            specifier._prereleases = other._prereleases
+        elif self._prereleases is not None and other._prereleases is None:
+            specifier._prereleases = self._prereleases
+        elif self._prereleases == other._prereleases:
+            specifier._prereleases = self._prereleases
+        else:
+            raise ValueError(
+                "Cannot combine SpecifierSets with True and False prerelease "
+                "overrides."
+            )
+
+        return specifier
+
+    def __eq__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs == other._specs
+
+    def __ne__(self, other):
+        if isinstance(other, string_types):
+            other = SpecifierSet(other)
+        elif isinstance(other, _IndividualSpecifier):
+            other = SpecifierSet(str(other))
+        elif not isinstance(other, SpecifierSet):
+            return NotImplemented
+
+        return self._specs != other._specs
+
+    def __len__(self):
+        return len(self._specs)
+
+    def __iter__(self):
+        return iter(self._specs)
+
+    @property
+    def prereleases(self):
+        # If we have been given an explicit prerelease modifier, then we'll
+        # pass that through here.
+        if self._prereleases is not None:
+            return self._prereleases
+
+        # If we don't have any specifiers, and we don't have a forced value,
+        # then we'll just return None since we don't know if this should have
+        # pre-releases or not.
+        if not self._specs:
+            return None
+
+        # Otherwise we'll see if any of the given specifiers accept
+        # prereleases, if any of them do we'll return True, otherwise False.
+        return any(s.prereleases for s in self._specs)
+
+    @prereleases.setter
+    def prereleases(self, value):
+        self._prereleases = value
+
+    def __contains__(self, item):
+        return self.contains(item)
+
+    def contains(self, item, prereleases=None):
+        # Ensure that our item is a Version or LegacyVersion instance.
+        if not isinstance(item, (LegacyVersion, Version)):
+            item = parse(item)
+
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # We can determine if we're going to allow pre-releases by looking to
+        # see if any of the underlying items supports them. If none of them do
+        # and this item is a pre-release then we do not allow it and we can
+        # short circuit that here.
+        # Note: This means that 1.0.dev1 would not be contained in something
+        #       like >=1.0.devabc however it would be in >=1.0.debabc,>0.0.dev0
+        if not prereleases and item.is_prerelease:
+            return False
+
+        # We simply dispatch to the underlying specs here to make sure that the
+        # given version is contained within all of them.
+        # Note: This use of all() here means that an empty set of specifiers
+        #       will always return True, this is an explicit design decision.
+        return all(s.contains(item, prereleases=prereleases) for s in self._specs)
+
+    def filter(self, iterable, prereleases=None):
+        # Determine if we're forcing a prerelease or not, if we're not forcing
+        # one for this particular filter call, then we'll use whatever the
+        # SpecifierSet thinks for whether or not we should support prereleases.
+        if prereleases is None:
+            prereleases = self.prereleases
+
+        # If we have any specifiers, then we want to wrap our iterable in the
+        # filter method for each one, this will act as a logical AND amongst
+        # each specifier.
+        if self._specs:
+            for spec in self._specs:
+                iterable = spec.filter(iterable, prereleases=bool(prereleases))
+            return iterable
+        # If we do not have any specifiers, then we need to have a rough filter
+        # which will filter out any pre-releases, unless there are no final
+        # releases, and which will filter out LegacyVersion in general.
+        else:
+            filtered = []
+            found_prereleases = []
+
+            for item in iterable:
+                # Ensure that we some kind of Version class for this item.
+                if not isinstance(item, (LegacyVersion, Version)):
+                    parsed_version = parse(item)
+                else:
+                    parsed_version = item
+
+                # Filter out any item which is parsed as a LegacyVersion
+                if isinstance(parsed_version, LegacyVersion):
+                    continue
+
+                # Store any item which is a pre-release for later unless we've
+                # already found a final version or we are accepting prereleases
+                if parsed_version.is_prerelease and not prereleases:
+                    if not filtered:
+                        found_prereleases.append(item)
+                else:
+                    filtered.append(item)
+
+            # If we've found no items except for pre-releases, then we'll go
+            # ahead and use the pre-releases
+            if not filtered and found_prereleases and prereleases is None:
+                return found_prereleases
+
+            return filtered
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/tags.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/tags.py
new file mode 100644
index 0000000..ec9942f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/tags.py
@@ -0,0 +1,404 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+
+from __future__ import absolute_import
+
+import distutils.util
+
+try:
+    from importlib.machinery import EXTENSION_SUFFIXES
+except ImportError:  # pragma: no cover
+    import imp
+
+    EXTENSION_SUFFIXES = [x[0] for x in imp.get_suffixes()]
+    del imp
+import platform
+import re
+import sys
+import sysconfig
+import warnings
+
+
+INTERPRETER_SHORT_NAMES = {
+    "python": "py",  # Generic.
+    "cpython": "cp",
+    "pypy": "pp",
+    "ironpython": "ip",
+    "jython": "jy",
+}
+
+
+_32_BIT_INTERPRETER = sys.maxsize <= 2 ** 32
+
+
+class Tag(object):
+
+    __slots__ = ["_interpreter", "_abi", "_platform"]
+
+    def __init__(self, interpreter, abi, platform):
+        self._interpreter = interpreter.lower()
+        self._abi = abi.lower()
+        self._platform = platform.lower()
+
+    @property
+    def interpreter(self):
+        return self._interpreter
+
+    @property
+    def abi(self):
+        return self._abi
+
+    @property
+    def platform(self):
+        return self._platform
+
+    def __eq__(self, other):
+        return (
+            (self.platform == other.platform)
+            and (self.abi == other.abi)
+            and (self.interpreter == other.interpreter)
+        )
+
+    def __hash__(self):
+        return hash((self._interpreter, self._abi, self._platform))
+
+    def __str__(self):
+        return "{}-{}-{}".format(self._interpreter, self._abi, self._platform)
+
+    def __repr__(self):
+        return "<{self} @ {self_id}>".format(self=self, self_id=id(self))
+
+
+def parse_tag(tag):
+    tags = set()
+    interpreters, abis, platforms = tag.split("-")
+    for interpreter in interpreters.split("."):
+        for abi in abis.split("."):
+            for platform_ in platforms.split("."):
+                tags.add(Tag(interpreter, abi, platform_))
+    return frozenset(tags)
+
+
+def _normalize_string(string):
+    return string.replace(".", "_").replace("-", "_")
+
+
+def _cpython_interpreter(py_version):
+    # TODO: Is using py_version_nodot for interpreter version critical?
+    return "cp{major}{minor}".format(major=py_version[0], minor=py_version[1])
+
+
+def _cpython_abis(py_version):
+    abis = []
+    version = "{}{}".format(*py_version[:2])
+    debug = pymalloc = ucs4 = ""
+    with_debug = sysconfig.get_config_var("Py_DEBUG")
+    has_refcount = hasattr(sys, "gettotalrefcount")
+    # Windows doesn't set Py_DEBUG, so checking for support of debug-compiled
+    # extension modules is the best option.
+    # https://github.com/pypa/pip/issues/3383#issuecomment-173267692
+    has_ext = "_d.pyd" in EXTENSION_SUFFIXES
+    if with_debug or (with_debug is None and (has_refcount or has_ext)):
+        debug = "d"
+    if py_version < (3, 8):
+        with_pymalloc = sysconfig.get_config_var("WITH_PYMALLOC")
+        if with_pymalloc or with_pymalloc is None:
+            pymalloc = "m"
+        if py_version < (3, 3):
+            unicode_size = sysconfig.get_config_var("Py_UNICODE_SIZE")
+            if unicode_size == 4 or (
+                unicode_size is None and sys.maxunicode == 0x10FFFF
+            ):
+                ucs4 = "u"
+    elif debug:
+        # Debug builds can also load "normal" extension modules.
+        # We can also assume no UCS-4 or pymalloc requirement.
+        abis.append("cp{version}".format(version=version))
+    abis.insert(
+        0,
+        "cp{version}{debug}{pymalloc}{ucs4}".format(
+            version=version, debug=debug, pymalloc=pymalloc, ucs4=ucs4
+        ),
+    )
+    return abis
+
+
+def _cpython_tags(py_version, interpreter, abis, platforms):
+    for abi in abis:
+        for platform_ in platforms:
+            yield Tag(interpreter, abi, platform_)
+    for tag in (Tag(interpreter, "abi3", platform_) for platform_ in platforms):
+        yield tag
+    for tag in (Tag(interpreter, "none", platform_) for platform_ in platforms):
+        yield tag
+    # PEP 384 was first implemented in Python 3.2.
+    for minor_version in range(py_version[1] - 1, 1, -1):
+        for platform_ in platforms:
+            interpreter = "cp{major}{minor}".format(
+                major=py_version[0], minor=minor_version
+            )
+            yield Tag(interpreter, "abi3", platform_)
+
+
+def _pypy_interpreter():
+    return "pp{py_major}{pypy_major}{pypy_minor}".format(
+        py_major=sys.version_info[0],
+        pypy_major=sys.pypy_version_info.major,
+        pypy_minor=sys.pypy_version_info.minor,
+    )
+
+
+def _generic_abi():
+    abi = sysconfig.get_config_var("SOABI")
+    if abi:
+        return _normalize_string(abi)
+    else:
+        return "none"
+
+
+def _pypy_tags(py_version, interpreter, abi, platforms):
+    for tag in (Tag(interpreter, abi, platform) for platform in platforms):
+        yield tag
+    for tag in (Tag(interpreter, "none", platform) for platform in platforms):
+        yield tag
+
+
+def _generic_tags(interpreter, py_version, abi, platforms):
+    for tag in (Tag(interpreter, abi, platform) for platform in platforms):
+        yield tag
+    if abi != "none":
+        tags = (Tag(interpreter, "none", platform_) for platform_ in platforms)
+        for tag in tags:
+            yield tag
+
+
+def _py_interpreter_range(py_version):
+    """
+    Yield Python versions in descending order.
+
+    After the latest version, the major-only version will be yielded, and then
+    all following versions up to 'end'.
+    """
+    yield "py{major}{minor}".format(major=py_version[0], minor=py_version[1])
+    yield "py{major}".format(major=py_version[0])
+    for minor in range(py_version[1] - 1, -1, -1):
+        yield "py{major}{minor}".format(major=py_version[0], minor=minor)
+
+
+def _independent_tags(interpreter, py_version, platforms):
+    """
+    Return the sequence of tags that are consistent across implementations.
+
+    The tags consist of:
+    - py*-none-<platform>
+    - <interpreter>-none-any
+    - py*-none-any
+    """
+    for version in _py_interpreter_range(py_version):
+        for platform_ in platforms:
+            yield Tag(version, "none", platform_)
+    yield Tag(interpreter, "none", "any")
+    for version in _py_interpreter_range(py_version):
+        yield Tag(version, "none", "any")
+
+
+def _mac_arch(arch, is_32bit=_32_BIT_INTERPRETER):
+    if not is_32bit:
+        return arch
+
+    if arch.startswith("ppc"):
+        return "ppc"
+
+    return "i386"
+
+
+def _mac_binary_formats(version, cpu_arch):
+    formats = [cpu_arch]
+    if cpu_arch == "x86_64":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat64", "fat32"])
+
+    elif cpu_arch == "i386":
+        if version < (10, 4):
+            return []
+        formats.extend(["intel", "fat32", "fat"])
+
+    elif cpu_arch == "ppc64":
+        # TODO: Need to care about 32-bit PPC for ppc64 through 10.2?
+        if version > (10, 5) or version < (10, 4):
+            return []
+        formats.append("fat64")
+
+    elif cpu_arch == "ppc":
+        if version > (10, 6):
+            return []
+        formats.extend(["fat32", "fat"])
+
+    formats.append("universal")
+    return formats
+
+
+def _mac_platforms(version=None, arch=None):
+    version_str, _, cpu_arch = platform.mac_ver()
+    if version is None:
+        version = tuple(map(int, version_str.split(".")[:2]))
+    if arch is None:
+        arch = _mac_arch(cpu_arch)
+    platforms = []
+    for minor_version in range(version[1], -1, -1):
+        compat_version = version[0], minor_version
+        binary_formats = _mac_binary_formats(compat_version, arch)
+        for binary_format in binary_formats:
+            platforms.append(
+                "macosx_{major}_{minor}_{binary_format}".format(
+                    major=compat_version[0],
+                    minor=compat_version[1],
+                    binary_format=binary_format,
+                )
+            )
+    return platforms
+
+
+# From PEP 513.
+def _is_manylinux_compatible(name, glibc_version):
+    # Check for presence of _manylinux module.
+    try:
+        import _manylinux
+
+        return bool(getattr(_manylinux, name + "_compatible"))
+    except (ImportError, AttributeError):
+        # Fall through to heuristic check below.
+        pass
+
+    return _have_compatible_glibc(*glibc_version)
+
+
+def _glibc_version_string():
+    # Returns glibc version string, or None if not using glibc.
+    import ctypes
+
+    # ctypes.CDLL(None) internally calls dlopen(NULL), and as the dlopen
+    # manpage says, "If filename is NULL, then the returned handle is for the
+    # main program". This way we can let the linker do the work to figure out
+    # which libc our process is actually using.
+    process_namespace = ctypes.CDLL(None)
+    try:
+        gnu_get_libc_version = process_namespace.gnu_get_libc_version
+    except AttributeError:
+        # Symbol doesn't exist -> therefore, we are not linked to
+        # glibc.
+        return None
+
+    # Call gnu_get_libc_version, which returns a string like "2.5"
+    gnu_get_libc_version.restype = ctypes.c_char_p
+    version_str = gnu_get_libc_version()
+    # py2 / py3 compatibility:
+    if not isinstance(version_str, str):
+        version_str = version_str.decode("ascii")
+
+    return version_str
+
+
+# Separated out from have_compatible_glibc for easier unit testing.
+def _check_glibc_version(version_str, required_major, minimum_minor):
+    # Parse string and check against requested version.
+    #
+    # We use a regexp instead of str.split because we want to discard any
+    # random junk that might come after the minor version -- this might happen
+    # in patched/forked versions of glibc (e.g. Linaro's version of glibc
+    # uses version strings like "2.20-2014.11"). See gh-3588.
+    m = re.match(r"(?P<major>[0-9]+)\.(?P<minor>[0-9]+)", version_str)
+    if not m:
+        warnings.warn(
+            "Expected glibc version with 2 components major.minor,"
+            " got: %s" % version_str,
+            RuntimeWarning,
+        )
+        return False
+    return (
+        int(m.group("major")) == required_major
+        and int(m.group("minor")) >= minimum_minor
+    )
+
+
+def _have_compatible_glibc(required_major, minimum_minor):
+    version_str = _glibc_version_string()
+    if version_str is None:
+        return False
+    return _check_glibc_version(version_str, required_major, minimum_minor)
+
+
+def _linux_platforms(is_32bit=_32_BIT_INTERPRETER):
+    linux = _normalize_string(distutils.util.get_platform())
+    if linux == "linux_x86_64" and is_32bit:
+        linux = "linux_i686"
+    manylinux_support = (
+        ("manylinux2014", (2, 17)),  # CentOS 7 w/ glibc 2.17 (PEP 599)
+        ("manylinux2010", (2, 12)),  # CentOS 6 w/ glibc 2.12 (PEP 571)
+        ("manylinux1", (2, 5)),  # CentOS 5 w/ glibc 2.5 (PEP 513)
+    )
+    manylinux_support_iter = iter(manylinux_support)
+    for name, glibc_version in manylinux_support_iter:
+        if _is_manylinux_compatible(name, glibc_version):
+            platforms = [linux.replace("linux", name)]
+            break
+    else:
+        platforms = []
+    # Support for a later manylinux implies support for an earlier version.
+    platforms += [linux.replace("linux", name) for name, _ in manylinux_support_iter]
+    platforms.append(linux)
+    return platforms
+
+
+def _generic_platforms():
+    platform = _normalize_string(distutils.util.get_platform())
+    return [platform]
+
+
+def _interpreter_name():
+    name = platform.python_implementation().lower()
+    return INTERPRETER_SHORT_NAMES.get(name) or name
+
+
+def _generic_interpreter(name, py_version):
+    version = sysconfig.get_config_var("py_version_nodot")
+    if not version:
+        version = "".join(map(str, py_version[:2]))
+    return "{name}{version}".format(name=name, version=version)
+
+
+def sys_tags():
+    """
+    Returns the sequence of tag triples for the running interpreter.
+
+    The order of the sequence corresponds to priority order for the
+    interpreter, from most to least important.
+    """
+    py_version = sys.version_info[:2]
+    interpreter_name = _interpreter_name()
+    if platform.system() == "Darwin":
+        platforms = _mac_platforms()
+    elif platform.system() == "Linux":
+        platforms = _linux_platforms()
+    else:
+        platforms = _generic_platforms()
+
+    if interpreter_name == "cp":
+        interpreter = _cpython_interpreter(py_version)
+        abis = _cpython_abis(py_version)
+        for tag in _cpython_tags(py_version, interpreter, abis, platforms):
+            yield tag
+    elif interpreter_name == "pp":
+        interpreter = _pypy_interpreter()
+        abi = _generic_abi()
+        for tag in _pypy_tags(py_version, interpreter, abi, platforms):
+            yield tag
+    else:
+        interpreter = _generic_interpreter(interpreter_name, py_version)
+        abi = _generic_abi()
+        for tag in _generic_tags(interpreter, py_version, abi, platforms):
+            yield tag
+    for tag in _independent_tags(interpreter, py_version, platforms):
+        yield tag
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/utils.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/utils.py
new file mode 100644
index 0000000..8841878
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/utils.py
@@ -0,0 +1,57 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import re
+
+from .version import InvalidVersion, Version
+
+
+_canonicalize_regex = re.compile(r"[-_.]+")
+
+
+def canonicalize_name(name):
+    # This is taken from PEP 503.
+    return _canonicalize_regex.sub("-", name).lower()
+
+
+def canonicalize_version(version):
+    """
+    This is very similar to Version.__str__, but has one subtle differences
+    with the way it handles the release segment.
+    """
+
+    try:
+        version = Version(version)
+    except InvalidVersion:
+        # Legacy versions cannot be normalized
+        return version
+
+    parts = []
+
+    # Epoch
+    if version.epoch != 0:
+        parts.append("{0}!".format(version.epoch))
+
+    # Release segment
+    # NB: This strips trailing '.0's to normalize
+    parts.append(re.sub(r"(\.0)+$", "", ".".join(str(x) for x in version.release)))
+
+    # Pre-release
+    if version.pre is not None:
+        parts.append("".join(str(x) for x in version.pre))
+
+    # Post-release
+    if version.post is not None:
+        parts.append(".post{0}".format(version.post))
+
+    # Development release
+    if version.dev is not None:
+        parts.append(".dev{0}".format(version.dev))
+
+    # Local version segment
+    if version.local is not None:
+        parts.append("+{0}".format(version.local))
+
+    return "".join(parts)
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/version.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/version.py
new file mode 100644
index 0000000..95157a1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/packaging/version.py
@@ -0,0 +1,420 @@
+# This file is dual licensed under the terms of the Apache License, Version
+# 2.0, and the BSD License. See the LICENSE file in the root of this repository
+# for complete details.
+from __future__ import absolute_import, division, print_function
+
+import collections
+import itertools
+import re
+
+from ._structures import Infinity
+
+
+__all__ = ["parse", "Version", "LegacyVersion", "InvalidVersion", "VERSION_PATTERN"]
+
+
+_Version = collections.namedtuple(
+    "_Version", ["epoch", "release", "dev", "pre", "post", "local"]
+)
+
+
+def parse(version):
+    """
+    Parse the given version string and return either a :class:`Version` object
+    or a :class:`LegacyVersion` object depending on if the given version is
+    a valid PEP 440 version or a legacy version.
+    """
+    try:
+        return Version(version)
+    except InvalidVersion:
+        return LegacyVersion(version)
+
+
+class InvalidVersion(ValueError):
+    """
+    An invalid version was found, users should refer to PEP 440.
+    """
+
+
+class _BaseVersion(object):
+    def __hash__(self):
+        return hash(self._key)
+
+    def __lt__(self, other):
+        return self._compare(other, lambda s, o: s < o)
+
+    def __le__(self, other):
+        return self._compare(other, lambda s, o: s <= o)
+
+    def __eq__(self, other):
+        return self._compare(other, lambda s, o: s == o)
+
+    def __ge__(self, other):
+        return self._compare(other, lambda s, o: s >= o)
+
+    def __gt__(self, other):
+        return self._compare(other, lambda s, o: s > o)
+
+    def __ne__(self, other):
+        return self._compare(other, lambda s, o: s != o)
+
+    def _compare(self, other, method):
+        if not isinstance(other, _BaseVersion):
+            return NotImplemented
+
+        return method(self._key, other._key)
+
+
+class LegacyVersion(_BaseVersion):
+    def __init__(self, version):
+        self._version = str(version)
+        self._key = _legacy_cmpkey(self._version)
+
+    def __str__(self):
+        return self._version
+
+    def __repr__(self):
+        return "<LegacyVersion({0})>".format(repr(str(self)))
+
+    @property
+    def public(self):
+        return self._version
+
+    @property
+    def base_version(self):
+        return self._version
+
+    @property
+    def epoch(self):
+        return -1
+
+    @property
+    def release(self):
+        return None
+
+    @property
+    def pre(self):
+        return None
+
+    @property
+    def post(self):
+        return None
+
+    @property
+    def dev(self):
+        return None
+
+    @property
+    def local(self):
+        return None
+
+    @property
+    def is_prerelease(self):
+        return False
+
+    @property
+    def is_postrelease(self):
+        return False
+
+    @property
+    def is_devrelease(self):
+        return False
+
+
+_legacy_version_component_re = re.compile(r"(\d+ | [a-z]+ | \.| -)", re.VERBOSE)
+
+_legacy_version_replacement_map = {
+    "pre": "c",
+    "preview": "c",
+    "-": "final-",
+    "rc": "c",
+    "dev": "@",
+}
+
+
+def _parse_version_parts(s):
+    for part in _legacy_version_component_re.split(s):
+        part = _legacy_version_replacement_map.get(part, part)
+
+        if not part or part == ".":
+            continue
+
+        if part[:1] in "0123456789":
+            # pad for numeric comparison
+            yield part.zfill(8)
+        else:
+            yield "*" + part
+
+    # ensure that alpha/beta/candidate are before final
+    yield "*final"
+
+
+def _legacy_cmpkey(version):
+    # We hardcode an epoch of -1 here. A PEP 440 version can only have a epoch
+    # greater than or equal to 0. This will effectively put the LegacyVersion,
+    # which uses the defacto standard originally implemented by setuptools,
+    # as before all PEP 440 versions.
+    epoch = -1
+
+    # This scheme is taken from pkg_resources.parse_version setuptools prior to
+    # it's adoption of the packaging library.
+    parts = []
+    for part in _parse_version_parts(version.lower()):
+        if part.startswith("*"):
+            # remove "-" before a prerelease tag
+            if part < "*final":
+                while parts and parts[-1] == "*final-":
+                    parts.pop()
+
+            # remove trailing zeros from each series of numeric parts
+            while parts and parts[-1] == "00000000":
+                parts.pop()
+
+        parts.append(part)
+    parts = tuple(parts)
+
+    return epoch, parts
+
+
+# Deliberately not anchored to the start and end of the string, to make it
+# easier for 3rd party code to reuse
+VERSION_PATTERN = r"""
+    v?
+    (?:
+        (?:(?P<epoch>[0-9]+)!)?                           # epoch
+        (?P<release>[0-9]+(?:\.[0-9]+)*)                  # release segment
+        (?P<pre>                                          # pre-release
+            [-_\.]?
+            (?P<pre_l>(a|b|c|rc|alpha|beta|pre|preview))
+            [-_\.]?
+            (?P<pre_n>[0-9]+)?
+        )?
+        (?P<post>                                         # post release
+            (?:-(?P<post_n1>[0-9]+))
+            |
+            (?:
+                [-_\.]?
+                (?P<post_l>post|rev|r)
+                [-_\.]?
+                (?P<post_n2>[0-9]+)?
+            )
+        )?
+        (?P<dev>                                          # dev release
+            [-_\.]?
+            (?P<dev_l>dev)
+            [-_\.]?
+            (?P<dev_n>[0-9]+)?
+        )?
+    )
+    (?:\+(?P<local>[a-z0-9]+(?:[-_\.][a-z0-9]+)*))?       # local version
+"""
+
+
+class Version(_BaseVersion):
+
+    _regex = re.compile(r"^\s*" + VERSION_PATTERN + r"\s*$", re.VERBOSE | re.IGNORECASE)
+
+    def __init__(self, version):
+        # Validate the version and parse it into pieces
+        match = self._regex.search(version)
+        if not match:
+            raise InvalidVersion("Invalid version: '{0}'".format(version))
+
+        # Store the parsed out pieces of the version
+        self._version = _Version(
+            epoch=int(match.group("epoch")) if match.group("epoch") else 0,
+            release=tuple(int(i) for i in match.group("release").split(".")),
+            pre=_parse_letter_version(match.group("pre_l"), match.group("pre_n")),
+            post=_parse_letter_version(
+                match.group("post_l"), match.group("post_n1") or match.group("post_n2")
+            ),
+            dev=_parse_letter_version(match.group("dev_l"), match.group("dev_n")),
+            local=_parse_local_version(match.group("local")),
+        )
+
+        # Generate a key which will be used for sorting
+        self._key = _cmpkey(
+            self._version.epoch,
+            self._version.release,
+            self._version.pre,
+            self._version.post,
+            self._version.dev,
+            self._version.local,
+        )
+
+    def __repr__(self):
+        return "<Version({0})>".format(repr(str(self)))
+
+    def __str__(self):
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        # Pre-release
+        if self.pre is not None:
+            parts.append("".join(str(x) for x in self.pre))
+
+        # Post-release
+        if self.post is not None:
+            parts.append(".post{0}".format(self.post))
+
+        # Development release
+        if self.dev is not None:
+            parts.append(".dev{0}".format(self.dev))
+
+        # Local version segment
+        if self.local is not None:
+            parts.append("+{0}".format(self.local))
+
+        return "".join(parts)
+
+    @property
+    def epoch(self):
+        return self._version.epoch
+
+    @property
+    def release(self):
+        return self._version.release
+
+    @property
+    def pre(self):
+        return self._version.pre
+
+    @property
+    def post(self):
+        return self._version.post[1] if self._version.post else None
+
+    @property
+    def dev(self):
+        return self._version.dev[1] if self._version.dev else None
+
+    @property
+    def local(self):
+        if self._version.local:
+            return ".".join(str(x) for x in self._version.local)
+        else:
+            return None
+
+    @property
+    def public(self):
+        return str(self).split("+", 1)[0]
+
+    @property
+    def base_version(self):
+        parts = []
+
+        # Epoch
+        if self.epoch != 0:
+            parts.append("{0}!".format(self.epoch))
+
+        # Release segment
+        parts.append(".".join(str(x) for x in self.release))
+
+        return "".join(parts)
+
+    @property
+    def is_prerelease(self):
+        return self.dev is not None or self.pre is not None
+
+    @property
+    def is_postrelease(self):
+        return self.post is not None
+
+    @property
+    def is_devrelease(self):
+        return self.dev is not None
+
+
+def _parse_letter_version(letter, number):
+    if letter:
+        # We consider there to be an implicit 0 in a pre-release if there is
+        # not a numeral associated with it.
+        if number is None:
+            number = 0
+
+        # We normalize any letters to their lower case form
+        letter = letter.lower()
+
+        # We consider some words to be alternate spellings of other words and
+        # in those cases we want to normalize the spellings to our preferred
+        # spelling.
+        if letter == "alpha":
+            letter = "a"
+        elif letter == "beta":
+            letter = "b"
+        elif letter in ["c", "pre", "preview"]:
+            letter = "rc"
+        elif letter in ["rev", "r"]:
+            letter = "post"
+
+        return letter, int(number)
+    if not letter and number:
+        # We assume if we are given a number, but we are not given a letter
+        # then this is using the implicit post release syntax (e.g. 1.0-1)
+        letter = "post"
+
+        return letter, int(number)
+
+
+_local_version_separators = re.compile(r"[\._-]")
+
+
+def _parse_local_version(local):
+    """
+    Takes a string like abc.1.twelve and turns it into ("abc", 1, "twelve").
+    """
+    if local is not None:
+        return tuple(
+            part.lower() if not part.isdigit() else int(part)
+            for part in _local_version_separators.split(local)
+        )
+
+
+def _cmpkey(epoch, release, pre, post, dev, local):
+    # When we compare a release version, we want to compare it with all of the
+    # trailing zeros removed. So we'll use a reverse the list, drop all the now
+    # leading zeros until we come to something non zero, then take the rest
+    # re-reverse it back into the correct order and make it a tuple and use
+    # that for our sorting key.
+    release = tuple(
+        reversed(list(itertools.dropwhile(lambda x: x == 0, reversed(release))))
+    )
+
+    # We need to "trick" the sorting algorithm to put 1.0.dev0 before 1.0a0.
+    # We'll do this by abusing the pre segment, but we _only_ want to do this
+    # if there is not a pre or a post segment. If we have one of those then
+    # the normal sorting rules will handle this case correctly.
+    if pre is None and post is None and dev is not None:
+        pre = -Infinity
+    # Versions without a pre-release (except as noted above) should sort after
+    # those with one.
+    elif pre is None:
+        pre = Infinity
+
+    # Versions without a post segment should sort before those with one.
+    if post is None:
+        post = -Infinity
+
+    # Versions without a development segment should sort after those with one.
+    if dev is None:
+        dev = Infinity
+
+    if local is None:
+        # Versions without a local segment should sort before those with one.
+        local = -Infinity
+    else:
+        # Versions with a local segment need that segment parsed to implement
+        # the sorting rules in PEP440.
+        # - Alpha numeric segments sort before numeric segments
+        # - Alpha numeric segments sort lexicographically
+        # - Numeric segments sort numerically
+        # - Shorter versions sort before longer versions when the prefixes
+        #   match exactly
+        local = tuple((i, "") if isinstance(i, int) else (-Infinity, i) for i in local)
+
+    return epoch, release, pre, post, dev, local
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/pyparsing.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/pyparsing.py
new file mode 100644
index 0000000..cf75e1e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/pyparsing.py
@@ -0,0 +1,5742 @@
+# module pyparsing.py
+#
+# Copyright (c) 2003-2018  Paul T. McGuire
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+
+__doc__ = \
+"""
+pyparsing module - Classes and methods to define and execute parsing grammars
+=============================================================================
+
+The pyparsing module is an alternative approach to creating and executing simple grammars,
+vs. the traditional lex/yacc approach, or the use of regular expressions.  With pyparsing, you
+don't need to learn a new syntax for defining grammars or matching expressions - the parsing module
+provides a library of classes that you use to construct the grammar directly in Python.
+
+Here is a program to parse "Hello, World!" (or any greeting of the form 
+C{"<salutation>, <addressee>!"}), built up using L{Word}, L{Literal}, and L{And} elements 
+(L{'+'<ParserElement.__add__>} operator gives L{And} expressions, strings are auto-converted to
+L{Literal} expressions)::
+
+    from pyparsing import Word, alphas
+
+    # define grammar of a greeting
+    greet = Word(alphas) + "," + Word(alphas) + "!"
+
+    hello = "Hello, World!"
+    print (hello, "->", greet.parseString(hello))
+
+The program outputs the following::
+
+    Hello, World! -> ['Hello', ',', 'World', '!']
+
+The Python representation of the grammar is quite readable, owing to the self-explanatory
+class names, and the use of '+', '|' and '^' operators.
+
+The L{ParseResults} object returned from L{ParserElement.parseString<ParserElement.parseString>} can be accessed as a nested list, a dictionary, or an
+object with named attributes.
+
+The pyparsing module handles some of the problems that are typically vexing when writing text parsers:
+ - extra or missing whitespace (the above program will also handle "Hello,World!", "Hello  ,  World  !", etc.)
+ - quoted strings
+ - embedded comments
+
+
+Getting Started -
+-----------------
+Visit the classes L{ParserElement} and L{ParseResults} to see the base classes that most other pyparsing
+classes inherit from. Use the docstrings for examples of how to:
+ - construct literal match expressions from L{Literal} and L{CaselessLiteral} classes
+ - construct character word-group expressions using the L{Word} class
+ - see how to create repetitive expressions using L{ZeroOrMore} and L{OneOrMore} classes
+ - use L{'+'<And>}, L{'|'<MatchFirst>}, L{'^'<Or>}, and L{'&'<Each>} operators to combine simple expressions into more complex ones
+ - associate names with your parsed results using L{ParserElement.setResultsName}
+ - find some helpful expression short-cuts like L{delimitedList} and L{oneOf}
+ - find more useful common expressions in the L{pyparsing_common} namespace class
+"""
+
+__version__ = "2.2.1"
+__versionTime__ = "18 Sep 2018 00:49 UTC"
+__author__ = "Paul McGuire <ptmcg@users.sourceforge.net>"
+
+import string
+from weakref import ref as wkref
+import copy
+import sys
+import warnings
+import re
+import sre_constants
+import collections
+import pprint
+import traceback
+import types
+from datetime import datetime
+
+try:
+    from _thread import RLock
+except ImportError:
+    from threading import RLock
+
+try:
+    # Python 3
+    from collections.abc import Iterable
+    from collections.abc import MutableMapping
+except ImportError:
+    # Python 2.7
+    from collections import Iterable
+    from collections import MutableMapping
+
+try:
+    from collections import OrderedDict as _OrderedDict
+except ImportError:
+    try:
+        from ordereddict import OrderedDict as _OrderedDict
+    except ImportError:
+        _OrderedDict = None
+
+#~ sys.stderr.write( "testing pyparsing module, version %s, %s\n" % (__version__,__versionTime__ ) )
+
+__all__ = [
+'And', 'CaselessKeyword', 'CaselessLiteral', 'CharsNotIn', 'Combine', 'Dict', 'Each', 'Empty',
+'FollowedBy', 'Forward', 'GoToColumn', 'Group', 'Keyword', 'LineEnd', 'LineStart', 'Literal',
+'MatchFirst', 'NoMatch', 'NotAny', 'OneOrMore', 'OnlyOnce', 'Optional', 'Or',
+'ParseBaseException', 'ParseElementEnhance', 'ParseException', 'ParseExpression', 'ParseFatalException',
+'ParseResults', 'ParseSyntaxException', 'ParserElement', 'QuotedString', 'RecursiveGrammarException',
+'Regex', 'SkipTo', 'StringEnd', 'StringStart', 'Suppress', 'Token', 'TokenConverter', 
+'White', 'Word', 'WordEnd', 'WordStart', 'ZeroOrMore',
+'alphanums', 'alphas', 'alphas8bit', 'anyCloseTag', 'anyOpenTag', 'cStyleComment', 'col',
+'commaSeparatedList', 'commonHTMLEntity', 'countedArray', 'cppStyleComment', 'dblQuotedString',
+'dblSlashComment', 'delimitedList', 'dictOf', 'downcaseTokens', 'empty', 'hexnums',
+'htmlComment', 'javaStyleComment', 'line', 'lineEnd', 'lineStart', 'lineno',
+'makeHTMLTags', 'makeXMLTags', 'matchOnlyAtCol', 'matchPreviousExpr', 'matchPreviousLiteral',
+'nestedExpr', 'nullDebugAction', 'nums', 'oneOf', 'opAssoc', 'operatorPrecedence', 'printables',
+'punc8bit', 'pythonStyleComment', 'quotedString', 'removeQuotes', 'replaceHTMLEntity', 
+'replaceWith', 'restOfLine', 'sglQuotedString', 'srange', 'stringEnd',
+'stringStart', 'traceParseAction', 'unicodeString', 'upcaseTokens', 'withAttribute',
+'indentedBlock', 'originalTextFor', 'ungroup', 'infixNotation','locatedExpr', 'withClass',
+'CloseMatch', 'tokenMap', 'pyparsing_common',
+]
+
+system_version = tuple(sys.version_info)[:3]
+PY_3 = system_version[0] == 3
+if PY_3:
+    _MAX_INT = sys.maxsize
+    basestring = str
+    unichr = chr
+    _ustr = str
+
+    # build list of single arg builtins, that can be used as parse actions
+    singleArgBuiltins = [sum, len, sorted, reversed, list, tuple, set, any, all, min, max]
+
+else:
+    _MAX_INT = sys.maxint
+    range = xrange
+
+    def _ustr(obj):
+        """Drop-in replacement for str(obj) that tries to be Unicode friendly. It first tries
+           str(obj). If that fails with a UnicodeEncodeError, then it tries unicode(obj). It
+           then < returns the unicode object | encodes it with the default encoding | ... >.
+        """
+        if isinstance(obj,unicode):
+            return obj
+
+        try:
+            # If this works, then _ustr(obj) has the same behaviour as str(obj), so
+            # it won't break any existing code.
+            return str(obj)
+
+        except UnicodeEncodeError:
+            # Else encode it
+            ret = unicode(obj).encode(sys.getdefaultencoding(), 'xmlcharrefreplace')
+            xmlcharref = Regex(r'&#\d+;')
+            xmlcharref.setParseAction(lambda t: '\\u' + hex(int(t[0][2:-1]))[2:])
+            return xmlcharref.transformString(ret)
+
+    # build list of single arg builtins, tolerant of Python version, that can be used as parse actions
+    singleArgBuiltins = []
+    import __builtin__
+    for fname in "sum len sorted reversed list tuple set any all min max".split():
+        try:
+            singleArgBuiltins.append(getattr(__builtin__,fname))
+        except AttributeError:
+            continue
+            
+_generatorType = type((y for y in range(1)))
+ 
+def _xml_escape(data):
+    """Escape &, <, >, ", ', etc. in a string of data."""
+
+    # ampersand must be replaced first
+    from_symbols = '&><"\''
+    to_symbols = ('&'+s+';' for s in "amp gt lt quot apos".split())
+    for from_,to_ in zip(from_symbols, to_symbols):
+        data = data.replace(from_, to_)
+    return data
+
+class _Constants(object):
+    pass
+
+alphas     = string.ascii_uppercase + string.ascii_lowercase
+nums       = "0123456789"
+hexnums    = nums + "ABCDEFabcdef"
+alphanums  = alphas + nums
+_bslash    = chr(92)
+printables = "".join(c for c in string.printable if c not in string.whitespace)
+
+class ParseBaseException(Exception):
+    """base exception class for all parsing runtime exceptions"""
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, pstr, loc=0, msg=None, elem=None ):
+        self.loc = loc
+        if msg is None:
+            self.msg = pstr
+            self.pstr = ""
+        else:
+            self.msg = msg
+            self.pstr = pstr
+        self.parserElement = elem
+        self.args = (pstr, loc, msg)
+
+    @classmethod
+    def _from_exception(cls, pe):
+        """
+        internal factory method to simplify creating one type of ParseException 
+        from another - avoids having __init__ signature conflicts among subclasses
+        """
+        return cls(pe.pstr, pe.loc, pe.msg, pe.parserElement)
+
+    def __getattr__( self, aname ):
+        """supported attributes by name are:
+            - lineno - returns the line number of the exception text
+            - col - returns the column number of the exception text
+            - line - returns the line containing the exception text
+        """
+        if( aname == "lineno" ):
+            return lineno( self.loc, self.pstr )
+        elif( aname in ("col", "column") ):
+            return col( self.loc, self.pstr )
+        elif( aname == "line" ):
+            return line( self.loc, self.pstr )
+        else:
+            raise AttributeError(aname)
+
+    def __str__( self ):
+        return "%s (at char %d), (line:%d, col:%d)" % \
+                ( self.msg, self.loc, self.lineno, self.column )
+    def __repr__( self ):
+        return _ustr(self)
+    def markInputline( self, markerString = ">!<" ):
+        """Extracts the exception line from the input string, and marks
+           the location of the exception with a special symbol.
+        """
+        line_str = self.line
+        line_column = self.column - 1
+        if markerString:
+            line_str = "".join((line_str[:line_column],
+                                markerString, line_str[line_column:]))
+        return line_str.strip()
+    def __dir__(self):
+        return "lineno col line".split() + dir(type(self))
+
+class ParseException(ParseBaseException):
+    """
+    Exception thrown when parse expressions don't match class;
+    supported attributes by name are:
+     - lineno - returns the line number of the exception text
+     - col - returns the column number of the exception text
+     - line - returns the line containing the exception text
+        
+    Example::
+        try:
+            Word(nums).setName("integer").parseString("ABC")
+        except ParseException as pe:
+            print(pe)
+            print("column: {}".format(pe.col))
+            
+    prints::
+       Expected integer (at char 0), (line:1, col:1)
+        column: 1
+    """
+    pass
+
+class ParseFatalException(ParseBaseException):
+    """user-throwable exception thrown when inconsistent parse content
+       is found; stops all parsing immediately"""
+    pass
+
+class ParseSyntaxException(ParseFatalException):
+    """just like L{ParseFatalException}, but thrown internally when an
+       L{ErrorStop<And._ErrorStop>} ('-' operator) indicates that parsing is to stop 
+       immediately because an unbacktrackable syntax error has been found"""
+    pass
+
+#~ class ReparseException(ParseBaseException):
+    #~ """Experimental class - parse actions can raise this exception to cause
+       #~ pyparsing to reparse the input string:
+        #~ - with a modified input string, and/or
+        #~ - with a modified start location
+       #~ Set the values of the ReparseException in the constructor, and raise the
+       #~ exception in a parse action to cause pyparsing to use the new string/location.
+       #~ Setting the values as None causes no change to be made.
+       #~ """
+    #~ def __init_( self, newstring, restartLoc ):
+        #~ self.newParseText = newstring
+        #~ self.reparseLoc = restartLoc
+
+class RecursiveGrammarException(Exception):
+    """exception thrown by L{ParserElement.validate} if the grammar could be improperly recursive"""
+    def __init__( self, parseElementList ):
+        self.parseElementTrace = parseElementList
+
+    def __str__( self ):
+        return "RecursiveGrammarException: %s" % self.parseElementTrace
+
+class _ParseResultsWithOffset(object):
+    def __init__(self,p1,p2):
+        self.tup = (p1,p2)
+    def __getitem__(self,i):
+        return self.tup[i]
+    def __repr__(self):
+        return repr(self.tup[0])
+    def setOffset(self,i):
+        self.tup = (self.tup[0],i)
+
+class ParseResults(object):
+    """
+    Structured parse results, to provide multiple means of access to the parsed data:
+       - as a list (C{len(results)})
+       - by list index (C{results[0], results[1]}, etc.)
+       - by attribute (C{results.<resultsName>} - see L{ParserElement.setResultsName})
+
+    Example::
+        integer = Word(nums)
+        date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+        # equivalent form:
+        # date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+
+        # parseString returns a ParseResults object
+        result = date_str.parseString("1999/12/31")
+
+        def test(s, fn=repr):
+            print("%s -> %s" % (s, fn(eval(s))))
+        test("list(result)")
+        test("result[0]")
+        test("result['month']")
+        test("result.day")
+        test("'month' in result")
+        test("'minutes' in result")
+        test("result.dump()", str)
+    prints::
+        list(result) -> ['1999', '/', '12', '/', '31']
+        result[0] -> '1999'
+        result['month'] -> '12'
+        result.day -> '31'
+        'month' in result -> True
+        'minutes' in result -> False
+        result.dump() -> ['1999', '/', '12', '/', '31']
+        - day: 31
+        - month: 12
+        - year: 1999
+    """
+    def __new__(cls, toklist=None, name=None, asList=True, modal=True ):
+        if isinstance(toklist, cls):
+            return toklist
+        retobj = object.__new__(cls)
+        retobj.__doinit = True
+        return retobj
+
+    # Performance tuning: we construct a *lot* of these, so keep this
+    # constructor as small and fast as possible
+    def __init__( self, toklist=None, name=None, asList=True, modal=True, isinstance=isinstance ):
+        if self.__doinit:
+            self.__doinit = False
+            self.__name = None
+            self.__parent = None
+            self.__accumNames = {}
+            self.__asList = asList
+            self.__modal = modal
+            if toklist is None:
+                toklist = []
+            if isinstance(toklist, list):
+                self.__toklist = toklist[:]
+            elif isinstance(toklist, _generatorType):
+                self.__toklist = list(toklist)
+            else:
+                self.__toklist = [toklist]
+            self.__tokdict = dict()
+
+        if name is not None and name:
+            if not modal:
+                self.__accumNames[name] = 0
+            if isinstance(name,int):
+                name = _ustr(name) # will always return a str, but use _ustr for consistency
+            self.__name = name
+            if not (isinstance(toklist, (type(None), basestring, list)) and toklist in (None,'',[])):
+                if isinstance(toklist,basestring):
+                    toklist = [ toklist ]
+                if asList:
+                    if isinstance(toklist,ParseResults):
+                        self[name] = _ParseResultsWithOffset(toklist.copy(),0)
+                    else:
+                        self[name] = _ParseResultsWithOffset(ParseResults(toklist[0]),0)
+                    self[name].__name = name
+                else:
+                    try:
+                        self[name] = toklist[0]
+                    except (KeyError,TypeError,IndexError):
+                        self[name] = toklist
+
+    def __getitem__( self, i ):
+        if isinstance( i, (int,slice) ):
+            return self.__toklist[i]
+        else:
+            if i not in self.__accumNames:
+                return self.__tokdict[i][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[i] ])
+
+    def __setitem__( self, k, v, isinstance=isinstance ):
+        if isinstance(v,_ParseResultsWithOffset):
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [v]
+            sub = v[0]
+        elif isinstance(k,(int,slice)):
+            self.__toklist[k] = v
+            sub = v
+        else:
+            self.__tokdict[k] = self.__tokdict.get(k,list()) + [_ParseResultsWithOffset(v,0)]
+            sub = v
+        if isinstance(sub,ParseResults):
+            sub.__parent = wkref(self)
+
+    def __delitem__( self, i ):
+        if isinstance(i,(int,slice)):
+            mylen = len( self.__toklist )
+            del self.__toklist[i]
+
+            # convert int to slice
+            if isinstance(i, int):
+                if i < 0:
+                    i += mylen
+                i = slice(i, i+1)
+            # get removed indices
+            removed = list(range(*i.indices(mylen)))
+            removed.reverse()
+            # fixup indices in token dictionary
+            for name,occurrences in self.__tokdict.items():
+                for j in removed:
+                    for k, (value, position) in enumerate(occurrences):
+                        occurrences[k] = _ParseResultsWithOffset(value, position - (position > j))
+        else:
+            del self.__tokdict[i]
+
+    def __contains__( self, k ):
+        return k in self.__tokdict
+
+    def __len__( self ): return len( self.__toklist )
+    def __bool__(self): return ( not not self.__toklist )
+    __nonzero__ = __bool__
+    def __iter__( self ): return iter( self.__toklist )
+    def __reversed__( self ): return iter( self.__toklist[::-1] )
+    def _iterkeys( self ):
+        if hasattr(self.__tokdict, "iterkeys"):
+            return self.__tokdict.iterkeys()
+        else:
+            return iter(self.__tokdict)
+
+    def _itervalues( self ):
+        return (self[k] for k in self._iterkeys())
+            
+    def _iteritems( self ):
+        return ((k, self[k]) for k in self._iterkeys())
+
+    if PY_3:
+        keys = _iterkeys       
+        """Returns an iterator of all named result keys (Python 3.x only)."""
+
+        values = _itervalues
+        """Returns an iterator of all named result values (Python 3.x only)."""
+
+        items = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 3.x only)."""
+
+    else:
+        iterkeys = _iterkeys
+        """Returns an iterator of all named result keys (Python 2.x only)."""
+
+        itervalues = _itervalues
+        """Returns an iterator of all named result values (Python 2.x only)."""
+
+        iteritems = _iteritems
+        """Returns an iterator of all named result key-value tuples (Python 2.x only)."""
+
+        def keys( self ):
+            """Returns all named result keys (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iterkeys())
+
+        def values( self ):
+            """Returns all named result values (as a list in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.itervalues())
+                
+        def items( self ):
+            """Returns all named result key-values (as a list of tuples in Python 2.x, as an iterator in Python 3.x)."""
+            return list(self.iteritems())
+
+    def haskeys( self ):
+        """Since keys() returns an iterator, this method is helpful in bypassing
+           code that looks for the existence of any defined results names."""
+        return bool(self.__tokdict)
+        
+    def pop( self, *args, **kwargs):
+        """
+        Removes and returns item at specified index (default=C{last}).
+        Supports both C{list} and C{dict} semantics for C{pop()}. If passed no
+        argument or an integer argument, it will use C{list} semantics
+        and pop tokens from the list of parsed tokens. If passed a 
+        non-integer argument (most likely a string), it will use C{dict}
+        semantics and pop the corresponding value from any defined 
+        results names. A second default return value argument is 
+        supported, just as in C{dict.pop()}.
+
+        Example::
+            def remove_first(tokens):
+                tokens.pop(0)
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            print(OneOrMore(Word(nums)).addParseAction(remove_first).parseString("0 123 321")) # -> ['123', '321']
+
+            label = Word(alphas)
+            patt = label("LABEL") + OneOrMore(Word(nums))
+            print(patt.parseString("AAB 123 321").dump())
+
+            # Use pop() in a parse action to remove named result (note that corresponding value is not
+            # removed from list form of results)
+            def remove_LABEL(tokens):
+                tokens.pop("LABEL")
+                return tokens
+            patt.addParseAction(remove_LABEL)
+            print(patt.parseString("AAB 123 321").dump())
+        prints::
+            ['AAB', '123', '321']
+            - LABEL: AAB
+
+            ['AAB', '123', '321']
+        """
+        if not args:
+            args = [-1]
+        for k,v in kwargs.items():
+            if k == 'default':
+                args = (args[0], v)
+            else:
+                raise TypeError("pop() got an unexpected keyword argument '%s'" % k)
+        if (isinstance(args[0], int) or 
+                        len(args) == 1 or 
+                        args[0] in self):
+            index = args[0]
+            ret = self[index]
+            del self[index]
+            return ret
+        else:
+            defaultvalue = args[1]
+            return defaultvalue
+
+    def get(self, key, defaultValue=None):
+        """
+        Returns named result matching the given key, or if there is no
+        such name, then returns the given C{defaultValue} or C{None} if no
+        C{defaultValue} is specified.
+
+        Similar to C{dict.get()}.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            result = date_str.parseString("1999/12/31")
+            print(result.get("year")) # -> '1999'
+            print(result.get("hour", "not specified")) # -> 'not specified'
+            print(result.get("hour")) # -> None
+        """
+        if key in self:
+            return self[key]
+        else:
+            return defaultValue
+
+    def insert( self, index, insStr ):
+        """
+        Inserts new element at location index in the list of parsed tokens.
+        
+        Similar to C{list.insert()}.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+
+            # use a parse action to insert the parse location in the front of the parsed results
+            def insert_locn(locn, tokens):
+                tokens.insert(0, locn)
+            print(OneOrMore(Word(nums)).addParseAction(insert_locn).parseString("0 123 321")) # -> [0, '0', '123', '321']
+        """
+        self.__toklist.insert(index, insStr)
+        # fixup indices in token dictionary
+        for name,occurrences in self.__tokdict.items():
+            for k, (value, position) in enumerate(occurrences):
+                occurrences[k] = _ParseResultsWithOffset(value, position + (position > index))
+
+    def append( self, item ):
+        """
+        Add single element to end of ParseResults list of elements.
+
+        Example::
+            print(OneOrMore(Word(nums)).parseString("0 123 321")) # -> ['0', '123', '321']
+            
+            # use a parse action to compute the sum of the parsed integers, and add it to the end
+            def append_sum(tokens):
+                tokens.append(sum(map(int, tokens)))
+            print(OneOrMore(Word(nums)).addParseAction(append_sum).parseString("0 123 321")) # -> ['0', '123', '321', 444]
+        """
+        self.__toklist.append(item)
+
+    def extend( self, itemseq ):
+        """
+        Add sequence of elements to end of ParseResults list of elements.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            
+            # use a parse action to append the reverse of the matched strings, to make a palindrome
+            def make_palindrome(tokens):
+                tokens.extend(reversed([t[::-1] for t in tokens]))
+                return ''.join(tokens)
+            print(patt.addParseAction(make_palindrome).parseString("lskdj sdlkjf lksd")) # -> 'lskdjsdlkjflksddsklfjkldsjdksl'
+        """
+        if isinstance(itemseq, ParseResults):
+            self += itemseq
+        else:
+            self.__toklist.extend(itemseq)
+
+    def clear( self ):
+        """
+        Clear all elements and results names.
+        """
+        del self.__toklist[:]
+        self.__tokdict.clear()
+
+    def __getattr__( self, name ):
+        try:
+            return self[name]
+        except KeyError:
+            return ""
+            
+        if name in self.__tokdict:
+            if name not in self.__accumNames:
+                return self.__tokdict[name][-1][0]
+            else:
+                return ParseResults([ v[0] for v in self.__tokdict[name] ])
+        else:
+            return ""
+
+    def __add__( self, other ):
+        ret = self.copy()
+        ret += other
+        return ret
+
+    def __iadd__( self, other ):
+        if other.__tokdict:
+            offset = len(self.__toklist)
+            addoffset = lambda a: offset if a<0 else a+offset
+            otheritems = other.__tokdict.items()
+            otherdictitems = [(k, _ParseResultsWithOffset(v[0],addoffset(v[1])) )
+                                for (k,vlist) in otheritems for v in vlist]
+            for k,v in otherdictitems:
+                self[k] = v
+                if isinstance(v[0],ParseResults):
+                    v[0].__parent = wkref(self)
+            
+        self.__toklist += other.__toklist
+        self.__accumNames.update( other.__accumNames )
+        return self
+
+    def __radd__(self, other):
+        if isinstance(other,int) and other == 0:
+            # useful for merging many ParseResults using sum() builtin
+            return self.copy()
+        else:
+            # this may raise a TypeError - so be it
+            return other + self
+        
+    def __repr__( self ):
+        return "(%s, %s)" % ( repr( self.__toklist ), repr( self.__tokdict ) )
+
+    def __str__( self ):
+        return '[' + ', '.join(_ustr(i) if isinstance(i, ParseResults) else repr(i) for i in self.__toklist) + ']'
+
+    def _asStringList( self, sep='' ):
+        out = []
+        for item in self.__toklist:
+            if out and sep:
+                out.append(sep)
+            if isinstance( item, ParseResults ):
+                out += item._asStringList()
+            else:
+                out.append( _ustr(item) )
+        return out
+
+    def asList( self ):
+        """
+        Returns the parse results as a nested list of matching tokens, all converted to strings.
+
+        Example::
+            patt = OneOrMore(Word(alphas))
+            result = patt.parseString("sldkj lsdkj sldkj")
+            # even though the result prints in string-like form, it is actually a pyparsing ParseResults
+            print(type(result), result) # -> <class 'pyparsing.ParseResults'> ['sldkj', 'lsdkj', 'sldkj']
+            
+            # Use asList() to create an actual list
+            result_list = result.asList()
+            print(type(result_list), result_list) # -> <class 'list'> ['sldkj', 'lsdkj', 'sldkj']
+        """
+        return [res.asList() if isinstance(res,ParseResults) else res for res in self.__toklist]
+
+    def asDict( self ):
+        """
+        Returns the named parse results as a nested dictionary.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(type(result), repr(result)) # -> <class 'pyparsing.ParseResults'> (['12', '/', '31', '/', '1999'], {'day': [('1999', 4)], 'year': [('12', 0)], 'month': [('31', 2)]})
+            
+            result_dict = result.asDict()
+            print(type(result_dict), repr(result_dict)) # -> <class 'dict'> {'day': '1999', 'year': '12', 'month': '31'}
+
+            # even though a ParseResults supports dict-like access, sometime you just need to have a dict
+            import json
+            print(json.dumps(result)) # -> Exception: TypeError: ... is not JSON serializable
+            print(json.dumps(result.asDict())) # -> {"month": "31", "day": "1999", "year": "12"}
+        """
+        if PY_3:
+            item_fn = self.items
+        else:
+            item_fn = self.iteritems
+            
+        def toItem(obj):
+            if isinstance(obj, ParseResults):
+                if obj.haskeys():
+                    return obj.asDict()
+                else:
+                    return [toItem(v) for v in obj]
+            else:
+                return obj
+                
+        return dict((k,toItem(v)) for k,v in item_fn())
+
+    def copy( self ):
+        """
+        Returns a new copy of a C{ParseResults} object.
+        """
+        ret = ParseResults( self.__toklist )
+        ret.__tokdict = self.__tokdict.copy()
+        ret.__parent = self.__parent
+        ret.__accumNames.update( self.__accumNames )
+        ret.__name = self.__name
+        return ret
+
+    def asXML( self, doctag=None, namedItemsOnly=False, indent="", formatted=True ):
+        """
+        (Deprecated) Returns the parse results as XML. Tags are created for tokens and lists that have defined results names.
+        """
+        nl = "\n"
+        out = []
+        namedItems = dict((v[1],k) for (k,vlist) in self.__tokdict.items()
+                                                            for v in vlist)
+        nextLevelIndent = indent + "  "
+
+        # collapse out indents if formatting is not desired
+        if not formatted:
+            indent = ""
+            nextLevelIndent = ""
+            nl = ""
+
+        selfTag = None
+        if doctag is not None:
+            selfTag = doctag
+        else:
+            if self.__name:
+                selfTag = self.__name
+
+        if not selfTag:
+            if namedItemsOnly:
+                return ""
+            else:
+                selfTag = "ITEM"
+
+        out += [ nl, indent, "<", selfTag, ">" ]
+
+        for i,res in enumerate(self.__toklist):
+            if isinstance(res,ParseResults):
+                if i in namedItems:
+                    out += [ res.asXML(namedItems[i],
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+                else:
+                    out += [ res.asXML(None,
+                                        namedItemsOnly and doctag is None,
+                                        nextLevelIndent,
+                                        formatted)]
+            else:
+                # individual token, see if there is a name for it
+                resTag = None
+                if i in namedItems:
+                    resTag = namedItems[i]
+                if not resTag:
+                    if namedItemsOnly:
+                        continue
+                    else:
+                        resTag = "ITEM"
+                xmlBodyText = _xml_escape(_ustr(res))
+                out += [ nl, nextLevelIndent, "<", resTag, ">",
+                                                xmlBodyText,
+                                                "</", resTag, ">" ]
+
+        out += [ nl, indent, "</", selfTag, ">" ]
+        return "".join(out)
+
+    def __lookup(self,sub):
+        for k,vlist in self.__tokdict.items():
+            for v,loc in vlist:
+                if sub is v:
+                    return k
+        return None
+
+    def getName(self):
+        r"""
+        Returns the results name for this token expression. Useful when several 
+        different expressions might match at a particular location.
+
+        Example::
+            integer = Word(nums)
+            ssn_expr = Regex(r"\d\d\d-\d\d-\d\d\d\d")
+            house_number_expr = Suppress('#') + Word(nums, alphanums)
+            user_data = (Group(house_number_expr)("house_number") 
+                        | Group(ssn_expr)("ssn")
+                        | Group(integer)("age"))
+            user_info = OneOrMore(user_data)
+            
+            result = user_info.parseString("22 111-22-3333 #221B")
+            for item in result:
+                print(item.getName(), ':', item[0])
+        prints::
+            age : 22
+            ssn : 111-22-3333
+            house_number : 221B
+        """
+        if self.__name:
+            return self.__name
+        elif self.__parent:
+            par = self.__parent()
+            if par:
+                return par.__lookup(self)
+            else:
+                return None
+        elif (len(self) == 1 and
+               len(self.__tokdict) == 1 and
+               next(iter(self.__tokdict.values()))[0][1] in (0,-1)):
+            return next(iter(self.__tokdict.keys()))
+        else:
+            return None
+
+    def dump(self, indent='', depth=0, full=True):
+        """
+        Diagnostic method for listing out the contents of a C{ParseResults}.
+        Accepts an optional C{indent} argument so that this string can be embedded
+        in a nested display of other data.
+
+        Example::
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+            
+            result = date_str.parseString('12/31/1999')
+            print(result.dump())
+        prints::
+            ['12', '/', '31', '/', '1999']
+            - day: 1999
+            - month: 31
+            - year: 12
+        """
+        out = []
+        NL = '\n'
+        out.append( indent+_ustr(self.asList()) )
+        if full:
+            if self.haskeys():
+                items = sorted((str(k), v) for k,v in self.items())
+                for k,v in items:
+                    if out:
+                        out.append(NL)
+                    out.append( "%s%s- %s: " % (indent,('  '*depth), k) )
+                    if isinstance(v,ParseResults):
+                        if v:
+                            out.append( v.dump(indent,depth+1) )
+                        else:
+                            out.append(_ustr(v))
+                    else:
+                        out.append(repr(v))
+            elif any(isinstance(vv,ParseResults) for vv in self):
+                v = self
+                for i,vv in enumerate(v):
+                    if isinstance(vv,ParseResults):
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),vv.dump(indent,depth+1) ))
+                    else:
+                        out.append("\n%s%s[%d]:\n%s%s%s" % (indent,('  '*(depth)),i,indent,('  '*(depth+1)),_ustr(vv)))
+            
+        return "".join(out)
+
+    def pprint(self, *args, **kwargs):
+        """
+        Pretty-printer for parsed results as a list, using the C{pprint} module.
+        Accepts additional positional or keyword args as defined for the 
+        C{pprint.pprint} method. (U{http://docs.python.org/3/library/pprint.html#pprint.pprint})
+
+        Example::
+            ident = Word(alphas, alphanums)
+            num = Word(nums)
+            func = Forward()
+            term = ident | num | Group('(' + func + ')')
+            func <<= ident + Group(Optional(delimitedList(term)))
+            result = func.parseString("fna a,b,(fnb c,d,200),100")
+            result.pprint(width=40)
+        prints::
+            ['fna',
+             ['a',
+              'b',
+              ['(', 'fnb', ['c', 'd', '200'], ')'],
+              '100']]
+        """
+        pprint.pprint(self.asList(), *args, **kwargs)
+
+    # add support for pickle protocol
+    def __getstate__(self):
+        return ( self.__toklist,
+                 ( self.__tokdict.copy(),
+                   self.__parent is not None and self.__parent() or None,
+                   self.__accumNames,
+                   self.__name ) )
+
+    def __setstate__(self,state):
+        self.__toklist = state[0]
+        (self.__tokdict,
+         par,
+         inAccumNames,
+         self.__name) = state[1]
+        self.__accumNames = {}
+        self.__accumNames.update(inAccumNames)
+        if par is not None:
+            self.__parent = wkref(par)
+        else:
+            self.__parent = None
+
+    def __getnewargs__(self):
+        return self.__toklist, self.__name, self.__asList, self.__modal
+
+    def __dir__(self):
+        return (dir(type(self)) + list(self.keys()))
+
+MutableMapping.register(ParseResults)
+
+def col (loc,strg):
+    """Returns current column within a string, counting newlines as line separators.
+   The first column is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    s = strg
+    return 1 if 0<loc<len(s) and s[loc-1] == '\n' else loc - s.rfind("\n", 0, loc)
+
+def lineno(loc,strg):
+    """Returns current line number within a string, counting newlines as line separators.
+   The first line is number 1.
+
+   Note: the default parsing behavior is to expand tabs in the input string
+   before starting the parsing process.  See L{I{ParserElement.parseString}<ParserElement.parseString>} for more information
+   on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+   consistent view of the parsed string, the parse location, and line and column
+   positions within the parsed string.
+   """
+    return strg.count("\n",0,loc) + 1
+
+def line( loc, strg ):
+    """Returns the line of text containing loc within a string, counting newlines as line separators.
+       """
+    lastCR = strg.rfind("\n", 0, loc)
+    nextCR = strg.find("\n", loc)
+    if nextCR >= 0:
+        return strg[lastCR+1:nextCR]
+    else:
+        return strg[lastCR+1:]
+
+def _defaultStartDebugAction( instring, loc, expr ):
+    print (("Match " + _ustr(expr) + " at loc " + _ustr(loc) + "(%d,%d)" % ( lineno(loc,instring), col(loc,instring) )))
+
+def _defaultSuccessDebugAction( instring, startloc, endloc, expr, toks ):
+    print ("Matched " + _ustr(expr) + " -> " + str(toks.asList()))
+
+def _defaultExceptionDebugAction( instring, loc, expr, exc ):
+    print ("Exception raised:" + _ustr(exc))
+
+def nullDebugAction(*args):
+    """'Do-nothing' debug action, to suppress debugging output during parsing."""
+    pass
+
+# Only works on Python 3.x - nonlocal is toxic to Python 2 installs
+#~ 'decorator to trim function calls to match the arity of the target'
+#~ def _trim_arity(func, maxargs=3):
+    #~ if func in singleArgBuiltins:
+        #~ return lambda s,l,t: func(t)
+    #~ limit = 0
+    #~ foundArity = False
+    #~ def wrapper(*args):
+        #~ nonlocal limit,foundArity
+        #~ while 1:
+            #~ try:
+                #~ ret = func(*args[limit:])
+                #~ foundArity = True
+                #~ return ret
+            #~ except TypeError:
+                #~ if limit == maxargs or foundArity:
+                    #~ raise
+                #~ limit += 1
+                #~ continue
+    #~ return wrapper
+
+# this version is Python 2.x-3.x cross-compatible
+'decorator to trim function calls to match the arity of the target'
+def _trim_arity(func, maxargs=2):
+    if func in singleArgBuiltins:
+        return lambda s,l,t: func(t)
+    limit = [0]
+    foundArity = [False]
+    
+    # traceback return data structure changed in Py3.5 - normalize back to plain tuples
+    if system_version[:2] >= (3,5):
+        def extract_stack(limit=0):
+            # special handling for Python 3.5.0 - extra deep call stack by 1
+            offset = -3 if system_version == (3,5,0) else -2
+            frame_summary = traceback.extract_stack(limit=-offset+limit-1)[offset]
+            return [frame_summary[:2]]
+        def extract_tb(tb, limit=0):
+            frames = traceback.extract_tb(tb, limit=limit)
+            frame_summary = frames[-1]
+            return [frame_summary[:2]]
+    else:
+        extract_stack = traceback.extract_stack
+        extract_tb = traceback.extract_tb
+    
+    # synthesize what would be returned by traceback.extract_stack at the call to 
+    # user's parse action 'func', so that we don't incur call penalty at parse time
+    
+    LINE_DIFF = 6
+    # IF ANY CODE CHANGES, EVEN JUST COMMENTS OR BLANK LINES, BETWEEN THE NEXT LINE AND 
+    # THE CALL TO FUNC INSIDE WRAPPER, LINE_DIFF MUST BE MODIFIED!!!!
+    this_line = extract_stack(limit=2)[-1]
+    pa_call_line_synth = (this_line[0], this_line[1]+LINE_DIFF)
+
+    def wrapper(*args):
+        while 1:
+            try:
+                ret = func(*args[limit[0]:])
+                foundArity[0] = True
+                return ret
+            except TypeError:
+                # re-raise TypeErrors if they did not come from our arity testing
+                if foundArity[0]:
+                    raise
+                else:
+                    try:
+                        tb = sys.exc_info()[-1]
+                        if not extract_tb(tb, limit=2)[-1][:2] == pa_call_line_synth:
+                            raise
+                    finally:
+                        del tb
+
+                if limit[0] <= maxargs:
+                    limit[0] += 1
+                    continue
+                raise
+
+    # copy func name to wrapper for sensible debug output
+    func_name = "<parse action>"
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    wrapper.__name__ = func_name
+
+    return wrapper
+
+class ParserElement(object):
+    """Abstract base level parser element class."""
+    DEFAULT_WHITE_CHARS = " \n\t\r"
+    verbose_stacktrace = False
+
+    @staticmethod
+    def setDefaultWhitespaceChars( chars ):
+        r"""
+        Overrides the default whitespace chars
+
+        Example::
+            # default whitespace chars are space, <TAB> and newline
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def', 'ghi', 'jkl']
+            
+            # change to just treat newline as significant
+            ParserElement.setDefaultWhitespaceChars(" \t")
+            OneOrMore(Word(alphas)).parseString("abc def\nghi jkl")  # -> ['abc', 'def']
+        """
+        ParserElement.DEFAULT_WHITE_CHARS = chars
+
+    @staticmethod
+    def inlineLiteralsUsing(cls):
+        """
+        Set class to be used for inclusion of string literals into a parser.
+        
+        Example::
+            # default literal class used is Literal
+            integer = Word(nums)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+
+            # change to Suppress
+            ParserElement.inlineLiteralsUsing(Suppress)
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")           
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '12', '31']
+        """
+        ParserElement._literalStringClass = cls
+
+    def __init__( self, savelist=False ):
+        self.parseAction = list()
+        self.failAction = None
+        #~ self.name = "<unknown>"  # don't define self.name, let subclasses try/except upcall
+        self.strRepr = None
+        self.resultsName = None
+        self.saveAsList = savelist
+        self.skipWhitespace = True
+        self.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        self.copyDefaultWhiteChars = True
+        self.mayReturnEmpty = False # used when checking for left-recursion
+        self.keepTabs = False
+        self.ignoreExprs = list()
+        self.debug = False
+        self.streamlined = False
+        self.mayIndexError = True # used to optimize exception handling for subclasses that don't advance parse index
+        self.errmsg = ""
+        self.modalResults = True # used to mark results names as modal (report only last) or cumulative (list all)
+        self.debugActions = ( None, None, None ) #custom debug actions
+        self.re = None
+        self.callPreparse = True # used to avoid redundant calls to preParse
+        self.callDuringTry = False
+
+    def copy( self ):
+        """
+        Make a copy of this C{ParserElement}.  Useful for defining different parse actions
+        for the same parsing pattern, using copies of the original parse element.
+        
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            integerK = integer.copy().addParseAction(lambda toks: toks[0]*1024) + Suppress("K")
+            integerM = integer.copy().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+            
+            print(OneOrMore(integerK | integerM | integer).parseString("5K 100 640K 256M"))
+        prints::
+            [5120, 100, 655360, 268435456]
+        Equivalent form of C{expr.copy()} is just C{expr()}::
+            integerM = integer().addParseAction(lambda toks: toks[0]*1024*1024) + Suppress("M")
+        """
+        cpy = copy.copy( self )
+        cpy.parseAction = self.parseAction[:]
+        cpy.ignoreExprs = self.ignoreExprs[:]
+        if self.copyDefaultWhiteChars:
+            cpy.whiteChars = ParserElement.DEFAULT_WHITE_CHARS
+        return cpy
+
+    def setName( self, name ):
+        """
+        Define name for this expression, makes debugging and exception messages clearer.
+        
+        Example::
+            Word(nums).parseString("ABC")  # -> Exception: Expected W:(0123...) (at char 0), (line:1, col:1)
+            Word(nums).setName("integer").parseString("ABC")  # -> Exception: Expected integer (at char 0), (line:1, col:1)
+        """
+        self.name = name
+        self.errmsg = "Expected " + self.name
+        if hasattr(self,"exception"):
+            self.exception.msg = self.errmsg
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        """
+        Define name for referencing matching tokens as a nested attribute
+        of the returned parse results.
+        NOTE: this returns a *copy* of the original C{ParserElement} object;
+        this is so that the client can define a basic element, such as an
+        integer, and reference it in multiple places with different names.
+
+        You can also set results names using the abbreviated syntax,
+        C{expr("name")} in place of C{expr.setResultsName("name")} - 
+        see L{I{__call__}<__call__>}.
+
+        Example::
+            date_str = (integer.setResultsName("year") + '/' 
+                        + integer.setResultsName("month") + '/' 
+                        + integer.setResultsName("day"))
+
+            # equivalent form:
+            date_str = integer("year") + '/' + integer("month") + '/' + integer("day")
+        """
+        newself = self.copy()
+        if name.endswith("*"):
+            name = name[:-1]
+            listAllMatches=True
+        newself.resultsName = name
+        newself.modalResults = not listAllMatches
+        return newself
+
+    def setBreak(self,breakFlag = True):
+        """Method to invoke the Python pdb debugger when this element is
+           about to be parsed. Set C{breakFlag} to True to enable, False to
+           disable.
+        """
+        if breakFlag:
+            _parseMethod = self._parse
+            def breaker(instring, loc, doActions=True, callPreParse=True):
+                import pdb
+                pdb.set_trace()
+                return _parseMethod( instring, loc, doActions, callPreParse )
+            breaker._originalParseMethod = _parseMethod
+            self._parse = breaker
+        else:
+            if hasattr(self._parse,"_originalParseMethod"):
+                self._parse = self._parse._originalParseMethod
+        return self
+
+    def setParseAction( self, *fns, **kwargs ):
+        """
+        Define one or more actions to perform when successfully matching parse element definition.
+        Parse action fn is a callable method with 0-3 arguments, called as C{fn(s,loc,toks)},
+        C{fn(loc,toks)}, C{fn(toks)}, or just C{fn()}, where:
+         - s   = the original string being parsed (see note below)
+         - loc = the location of the matching substring
+         - toks = a list of the matched tokens, packaged as a C{L{ParseResults}} object
+        If the functions in fns modify the tokens, they can return them as the return
+        value from fn, and the modified list of tokens will replace the original.
+        Otherwise, fn does not need to return any value.
+
+        Optional keyword arguments:
+         - callDuringTry = (default=C{False}) indicate if parse action should be run during lookaheads and alternate testing
+
+        Note: the default parsing behavior is to expand tabs in the input string
+        before starting the parsing process.  See L{I{parseString}<parseString>} for more information
+        on parsing strings containing C{<TAB>}s, and suggested methods to maintain a
+        consistent view of the parsed string, the parse location, and line and column
+        positions within the parsed string.
+        
+        Example::
+            integer = Word(nums)
+            date_str = integer + '/' + integer + '/' + integer
+
+            date_str.parseString("1999/12/31")  # -> ['1999', '/', '12', '/', '31']
+
+            # use parse action to convert to ints at parse time
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            date_str = integer + '/' + integer + '/' + integer
+
+            # note that integer fields are now ints, not strings
+            date_str.parseString("1999/12/31")  # -> [1999, '/', 12, '/', 31]
+        """
+        self.parseAction = list(map(_trim_arity, list(fns)))
+        self.callDuringTry = kwargs.get("callDuringTry", False)
+        return self
+
+    def addParseAction( self, *fns, **kwargs ):
+        """
+        Add one or more parse actions to expression's list of parse actions. See L{I{setParseAction}<setParseAction>}.
+        
+        See examples in L{I{copy}<copy>}.
+        """
+        self.parseAction += list(map(_trim_arity, list(fns)))
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def addCondition(self, *fns, **kwargs):
+        """Add a boolean predicate function to expression's list of parse actions. See 
+        L{I{setParseAction}<setParseAction>} for function call signatures. Unlike C{setParseAction}, 
+        functions passed to C{addCondition} need to return boolean success/fail of the condition.
+
+        Optional keyword arguments:
+         - message = define a custom message to be used in the raised exception
+         - fatal   = if True, will raise ParseFatalException to stop parsing immediately; otherwise will raise ParseException
+         
+        Example::
+            integer = Word(nums).setParseAction(lambda toks: int(toks[0]))
+            year_int = integer.copy()
+            year_int.addCondition(lambda toks: toks[0] >= 2000, message="Only support years 2000 and later")
+            date_str = year_int + '/' + integer + '/' + integer
+
+            result = date_str.parseString("1999/12/31")  # -> Exception: Only support years 2000 and later (at char 0), (line:1, col:1)
+        """
+        msg = kwargs.get("message", "failed user-defined condition")
+        exc_type = ParseFatalException if kwargs.get("fatal", False) else ParseException
+        for fn in fns:
+            def pa(s,l,t):
+                if not bool(_trim_arity(fn)(s,l,t)):
+                    raise exc_type(s,l,msg)
+            self.parseAction.append(pa)
+        self.callDuringTry = self.callDuringTry or kwargs.get("callDuringTry", False)
+        return self
+
+    def setFailAction( self, fn ):
+        """Define action to perform if parsing fails at this expression.
+           Fail acton fn is a callable function that takes the arguments
+           C{fn(s,loc,expr,err)} where:
+            - s = string being parsed
+            - loc = location where expression match was attempted and failed
+            - expr = the parse expression that failed
+            - err = the exception thrown
+           The function returns no value.  It may throw C{L{ParseFatalException}}
+           if it is desired to stop parsing immediately."""
+        self.failAction = fn
+        return self
+
+    def _skipIgnorables( self, instring, loc ):
+        exprsFound = True
+        while exprsFound:
+            exprsFound = False
+            for e in self.ignoreExprs:
+                try:
+                    while 1:
+                        loc,dummy = e._parse( instring, loc )
+                        exprsFound = True
+                except ParseException:
+                    pass
+        return loc
+
+    def preParse( self, instring, loc ):
+        if self.ignoreExprs:
+            loc = self._skipIgnorables( instring, loc )
+
+        if self.skipWhitespace:
+            wt = self.whiteChars
+            instrlen = len(instring)
+            while loc < instrlen and instring[loc] in wt:
+                loc += 1
+
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        return loc, []
+
+    def postParse( self, instring, loc, tokenlist ):
+        return tokenlist
+
+    #~ @profile
+    def _parseNoCache( self, instring, loc, doActions=True, callPreParse=True ):
+        debugging = ( self.debug ) #and doActions )
+
+        if debugging or self.failAction:
+            #~ print ("Match",self,"at loc",loc,"(%d,%d)" % ( lineno(loc,instring), col(loc,instring) ))
+            if (self.debugActions[0] ):
+                self.debugActions[0]( instring, loc, self )
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            try:
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            except ParseBaseException as err:
+                #~ print ("Exception raised:", err)
+                if self.debugActions[2]:
+                    self.debugActions[2]( instring, tokensStart, self, err )
+                if self.failAction:
+                    self.failAction( instring, tokensStart, self, err )
+                raise
+        else:
+            if callPreParse and self.callPreparse:
+                preloc = self.preParse( instring, loc )
+            else:
+                preloc = loc
+            tokensStart = preloc
+            if self.mayIndexError or preloc >= len(instring):
+                try:
+                    loc,tokens = self.parseImpl( instring, preloc, doActions )
+                except IndexError:
+                    raise ParseException( instring, len(instring), self.errmsg, self )
+            else:
+                loc,tokens = self.parseImpl( instring, preloc, doActions )
+
+        tokens = self.postParse( instring, loc, tokens )
+
+        retTokens = ParseResults( tokens, self.resultsName, asList=self.saveAsList, modal=self.modalResults )
+        if self.parseAction and (doActions or self.callDuringTry):
+            if debugging:
+                try:
+                    for fn in self.parseAction:
+                        tokens = fn( instring, tokensStart, retTokens )
+                        if tokens is not None:
+                            retTokens = ParseResults( tokens,
+                                                      self.resultsName,
+                                                      asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                      modal=self.modalResults )
+                except ParseBaseException as err:
+                    #~ print "Exception raised in user parse action:", err
+                    if (self.debugActions[2] ):
+                        self.debugActions[2]( instring, tokensStart, self, err )
+                    raise
+            else:
+                for fn in self.parseAction:
+                    tokens = fn( instring, tokensStart, retTokens )
+                    if tokens is not None:
+                        retTokens = ParseResults( tokens,
+                                                  self.resultsName,
+                                                  asList=self.saveAsList and isinstance(tokens,(ParseResults,list)),
+                                                  modal=self.modalResults )
+        if debugging:
+            #~ print ("Matched",self,"->",retTokens.asList())
+            if (self.debugActions[1] ):
+                self.debugActions[1]( instring, tokensStart, loc, self, retTokens )
+
+        return loc, retTokens
+
+    def tryParse( self, instring, loc ):
+        try:
+            return self._parse( instring, loc, doActions=False )[0]
+        except ParseFatalException:
+            raise ParseException( instring, loc, self.errmsg, self)
+    
+    def canParseNext(self, instring, loc):
+        try:
+            self.tryParse(instring, loc)
+        except (ParseException, IndexError):
+            return False
+        else:
+            return True
+
+    class _UnboundedCache(object):
+        def __init__(self):
+            cache = {}
+            self.not_in_cache = not_in_cache = object()
+
+            def get(self, key):
+                return cache.get(key, not_in_cache)
+
+            def set(self, key, value):
+                cache[key] = value
+
+            def clear(self):
+                cache.clear()
+                
+            def cache_len(self):
+                return len(cache)
+
+            self.get = types.MethodType(get, self)
+            self.set = types.MethodType(set, self)
+            self.clear = types.MethodType(clear, self)
+            self.__len__ = types.MethodType(cache_len, self)
+
+    if _OrderedDict is not None:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = _OrderedDict()
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(cache) > size:
+                        try:
+                            cache.popitem(False)
+                        except KeyError:
+                            pass
+
+                def clear(self):
+                    cache.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    else:
+        class _FifoCache(object):
+            def __init__(self, size):
+                self.not_in_cache = not_in_cache = object()
+
+                cache = {}
+                key_fifo = collections.deque([], size)
+
+                def get(self, key):
+                    return cache.get(key, not_in_cache)
+
+                def set(self, key, value):
+                    cache[key] = value
+                    while len(key_fifo) > size:
+                        cache.pop(key_fifo.popleft(), None)
+                    key_fifo.append(key)
+
+                def clear(self):
+                    cache.clear()
+                    key_fifo.clear()
+
+                def cache_len(self):
+                    return len(cache)
+
+                self.get = types.MethodType(get, self)
+                self.set = types.MethodType(set, self)
+                self.clear = types.MethodType(clear, self)
+                self.__len__ = types.MethodType(cache_len, self)
+
+    # argument cache for optimizing repeated calls when backtracking through recursive expressions
+    packrat_cache = {} # this is set later by enabledPackrat(); this is here so that resetCache() doesn't fail
+    packrat_cache_lock = RLock()
+    packrat_cache_stats = [0, 0]
+
+    # this method gets repeatedly called during backtracking with the same arguments -
+    # we can cache these arguments and save ourselves the trouble of re-parsing the contained expression
+    def _parseCache( self, instring, loc, doActions=True, callPreParse=True ):
+        HIT, MISS = 0, 1
+        lookup = (self, instring, loc, callPreParse, doActions)
+        with ParserElement.packrat_cache_lock:
+            cache = ParserElement.packrat_cache
+            value = cache.get(lookup)
+            if value is cache.not_in_cache:
+                ParserElement.packrat_cache_stats[MISS] += 1
+                try:
+                    value = self._parseNoCache(instring, loc, doActions, callPreParse)
+                except ParseBaseException as pe:
+                    # cache a copy of the exception, without the traceback
+                    cache.set(lookup, pe.__class__(*pe.args))
+                    raise
+                else:
+                    cache.set(lookup, (value[0], value[1].copy()))
+                    return value
+            else:
+                ParserElement.packrat_cache_stats[HIT] += 1
+                if isinstance(value, Exception):
+                    raise value
+                return (value[0], value[1].copy())
+
+    _parse = _parseNoCache
+
+    @staticmethod
+    def resetCache():
+        ParserElement.packrat_cache.clear()
+        ParserElement.packrat_cache_stats[:] = [0] * len(ParserElement.packrat_cache_stats)
+
+    _packratEnabled = False
+    @staticmethod
+    def enablePackrat(cache_size_limit=128):
+        """Enables "packrat" parsing, which adds memoizing to the parsing logic.
+           Repeated parse attempts at the same string location (which happens
+           often in many complex grammars) can immediately return a cached value,
+           instead of re-executing parsing/validating code.  Memoizing is done of
+           both valid results and parsing exceptions.
+           
+           Parameters:
+            - cache_size_limit - (default=C{128}) - if an integer value is provided
+              will limit the size of the packrat cache; if None is passed, then
+              the cache size will be unbounded; if 0 is passed, the cache will
+              be effectively disabled.
+            
+           This speedup may break existing programs that use parse actions that
+           have side-effects.  For this reason, packrat parsing is disabled when
+           you first import pyparsing.  To activate the packrat feature, your
+           program must call the class method C{ParserElement.enablePackrat()}.  If
+           your program uses C{psyco} to "compile as you go", you must call
+           C{enablePackrat} before calling C{psyco.full()}.  If you do not do this,
+           Python will crash.  For best results, call C{enablePackrat()} immediately
+           after importing pyparsing.
+           
+           Example::
+               import pyparsing
+               pyparsing.ParserElement.enablePackrat()
+        """
+        if not ParserElement._packratEnabled:
+            ParserElement._packratEnabled = True
+            if cache_size_limit is None:
+                ParserElement.packrat_cache = ParserElement._UnboundedCache()
+            else:
+                ParserElement.packrat_cache = ParserElement._FifoCache(cache_size_limit)
+            ParserElement._parse = ParserElement._parseCache
+
+    def parseString( self, instring, parseAll=False ):
+        """
+        Execute the parse expression with the given string.
+        This is the main interface to the client code, once the complete
+        expression has been built.
+
+        If you want the grammar to require that the entire input string be
+        successfully parsed, then set C{parseAll} to True (equivalent to ending
+        the grammar with C{L{StringEnd()}}).
+
+        Note: C{parseString} implicitly calls C{expandtabs()} on the input string,
+        in order to report proper column numbers in parse actions.
+        If the input string contains tabs and
+        the grammar uses parse actions that use the C{loc} argument to index into the
+        string being parsed, you can ensure you have a consistent view of the input
+        string by:
+         - calling C{parseWithTabs} on your grammar before calling C{parseString}
+           (see L{I{parseWithTabs}<parseWithTabs>})
+         - define your parse action using the full C{(s,loc,toks)} signature, and
+           reference the input string using the parse action's C{s} argument
+         - explictly expand the tabs in your input string before calling
+           C{parseString}
+        
+        Example::
+            Word('a').parseString('aaaaabaaa')  # -> ['aaaaa']
+            Word('a').parseString('aaaaabaaa', parseAll=True)  # -> Exception: Expected end of text
+        """
+        ParserElement.resetCache()
+        if not self.streamlined:
+            self.streamline()
+            #~ self.saveAsList = True
+        for e in self.ignoreExprs:
+            e.streamline()
+        if not self.keepTabs:
+            instring = instring.expandtabs()
+        try:
+            loc, tokens = self._parse( instring, 0 )
+            if parseAll:
+                loc = self.preParse( instring, loc )
+                se = Empty() + StringEnd()
+                se._parse( instring, loc )
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+        else:
+            return tokens
+
+    def scanString( self, instring, maxMatches=_MAX_INT, overlap=False ):
+        """
+        Scan the input string for expression matches.  Each match will return the
+        matching tokens, start location, and end location.  May be called with optional
+        C{maxMatches} argument, to clip scanning after 'n' matches are found.  If
+        C{overlap} is specified, then overlapping matches will be reported.
+
+        Note that the start and end locations are reported relative to the string
+        being parsed.  See L{I{parseString}<parseString>} for more information on parsing
+        strings with embedded tabs.
+
+        Example::
+            source = "sldjf123lsdjjkf345sldkjf879lkjsfd987"
+            print(source)
+            for tokens,start,end in Word(alphas).scanString(source):
+                print(' '*start + '^'*(end-start))
+                print(' '*start + tokens[0])
+        
+        prints::
+        
+            sldjf123lsdjjkf345sldkjf879lkjsfd987
+            ^^^^^
+            sldjf
+                    ^^^^^^^
+                    lsdjjkf
+                              ^^^^^^
+                              sldkjf
+                                       ^^^^^^
+                                       lkjsfd
+        """
+        if not self.streamlined:
+            self.streamline()
+        for e in self.ignoreExprs:
+            e.streamline()
+
+        if not self.keepTabs:
+            instring = _ustr(instring).expandtabs()
+        instrlen = len(instring)
+        loc = 0
+        preparseFn = self.preParse
+        parseFn = self._parse
+        ParserElement.resetCache()
+        matches = 0
+        try:
+            while loc <= instrlen and matches < maxMatches:
+                try:
+                    preloc = preparseFn( instring, loc )
+                    nextLoc,tokens = parseFn( instring, preloc, callPreParse=False )
+                except ParseException:
+                    loc = preloc+1
+                else:
+                    if nextLoc > loc:
+                        matches += 1
+                        yield tokens, preloc, nextLoc
+                        if overlap:
+                            nextloc = preparseFn( instring, loc )
+                            if nextloc > loc:
+                                loc = nextLoc
+                            else:
+                                loc += 1
+                        else:
+                            loc = nextLoc
+                    else:
+                        loc = preloc+1
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def transformString( self, instring ):
+        """
+        Extension to C{L{scanString}}, to modify matching text with modified tokens that may
+        be returned from a parse action.  To use C{transformString}, define a grammar and
+        attach a parse action to it that modifies the returned token list.
+        Invoking C{transformString()} on a target string will then scan for matches,
+        and replace the matched text patterns according to the logic in the parse
+        action.  C{transformString()} returns the resulting transformed string.
+        
+        Example::
+            wd = Word(alphas)
+            wd.setParseAction(lambda toks: toks[0].title())
+            
+            print(wd.transformString("now is the winter of our discontent made glorious summer by this sun of york."))
+        Prints::
+            Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York.
+        """
+        out = []
+        lastE = 0
+        # force preservation of <TAB>s, to minimize unwanted transformation of string, and to
+        # keep string locs straight between transformString and scanString
+        self.keepTabs = True
+        try:
+            for t,s,e in self.scanString( instring ):
+                out.append( instring[lastE:s] )
+                if t:
+                    if isinstance(t,ParseResults):
+                        out += t.asList()
+                    elif isinstance(t,list):
+                        out += t
+                    else:
+                        out.append(t)
+                lastE = e
+            out.append(instring[lastE:])
+            out = [o for o in out if o]
+            return "".join(map(_ustr,_flatten(out)))
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def searchString( self, instring, maxMatches=_MAX_INT ):
+        """
+        Another extension to C{L{scanString}}, simplifying the access to the tokens found
+        to match the given parse expression.  May be called with optional
+        C{maxMatches} argument, to clip searching after 'n' matches are found.
+        
+        Example::
+            # a capitalized word starts with an uppercase letter, followed by zero or more lowercase letters
+            cap_word = Word(alphas.upper(), alphas.lower())
+            
+            print(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity"))
+
+            # the sum() builtin can be used to merge results into a single ParseResults object
+            print(sum(cap_word.searchString("More than Iron, more than Lead, more than Gold I need Electricity")))
+        prints::
+            [['More'], ['Iron'], ['Lead'], ['Gold'], ['I'], ['Electricity']]
+            ['More', 'Iron', 'Lead', 'Gold', 'I', 'Electricity']
+        """
+        try:
+            return ParseResults([ t for t,s,e in self.scanString( instring, maxMatches ) ])
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def split(self, instring, maxsplit=_MAX_INT, includeSeparators=False):
+        """
+        Generator method to split a string using the given expression as a separator.
+        May be called with optional C{maxsplit} argument, to limit the number of splits;
+        and the optional C{includeSeparators} argument (default=C{False}), if the separating
+        matching text should be included in the split results.
+        
+        Example::        
+            punc = oneOf(list(".,;:/-!?"))
+            print(list(punc.split("This, this?, this sentence, is badly punctuated!")))
+        prints::
+            ['This', ' this', '', ' this sentence', ' is badly punctuated', '']
+        """
+        splits = 0
+        last = 0
+        for t,s,e in self.scanString(instring, maxMatches=maxsplit):
+            yield instring[last:s]
+            if includeSeparators:
+                yield t[0]
+            last = e
+        yield instring[last:]
+
+    def __add__(self, other ):
+        """
+        Implementation of + operator - returns C{L{And}}. Adding strings to a ParserElement
+        converts them to L{Literal}s by default.
+        
+        Example::
+            greet = Word(alphas) + "," + Word(alphas) + "!"
+            hello = "Hello, World!"
+            print (hello, "->", greet.parseString(hello))
+        Prints::
+            Hello, World! -> ['Hello', ',', 'World', '!']
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return And( [ self, other ] )
+
+    def __radd__(self, other ):
+        """
+        Implementation of + operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other + self
+
+    def __sub__(self, other):
+        """
+        Implementation of - operator, returns C{L{And}} with error stop
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return self + And._ErrorStop() + other
+
+    def __rsub__(self, other ):
+        """
+        Implementation of - operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other - self
+
+    def __mul__(self,other):
+        """
+        Implementation of * operator, allows use of C{expr * 3} in place of
+        C{expr + expr + expr}.  Expressions may also me multiplied by a 2-integer
+        tuple, similar to C{{min,max}} multipliers in regular expressions.  Tuples
+        may also include C{None} as in:
+         - C{expr*(n,None)} or C{expr*(n,)} is equivalent
+              to C{expr*n + L{ZeroOrMore}(expr)}
+              (read as "at least n instances of C{expr}")
+         - C{expr*(None,n)} is equivalent to C{expr*(0,n)}
+              (read as "0 to n instances of C{expr}")
+         - C{expr*(None,None)} is equivalent to C{L{ZeroOrMore}(expr)}
+         - C{expr*(1,None)} is equivalent to C{L{OneOrMore}(expr)}
+
+        Note that C{expr*(None,n)} does not raise an exception if
+        more than n exprs exist in the input stream; that is,
+        C{expr*(None,n)} does not enforce a maximum number of expr
+        occurrences.  If this behavior is desired, then write
+        C{expr*(None,n) + ~expr}
+        """
+        if isinstance(other,int):
+            minElements, optElements = other,0
+        elif isinstance(other,tuple):
+            other = (other + (None, None))[:2]
+            if other[0] is None:
+                other = (0, other[1])
+            if isinstance(other[0],int) and other[1] is None:
+                if other[0] == 0:
+                    return ZeroOrMore(self)
+                if other[0] == 1:
+                    return OneOrMore(self)
+                else:
+                    return self*other[0] + ZeroOrMore(self)
+            elif isinstance(other[0],int) and isinstance(other[1],int):
+                minElements, optElements = other
+                optElements -= minElements
+            else:
+                raise TypeError("cannot multiply 'ParserElement' and ('%s','%s') objects", type(other[0]),type(other[1]))
+        else:
+            raise TypeError("cannot multiply 'ParserElement' and '%s' objects", type(other))
+
+        if minElements < 0:
+            raise ValueError("cannot multiply ParserElement by negative value")
+        if optElements < 0:
+            raise ValueError("second tuple value must be greater or equal to first tuple value")
+        if minElements == optElements == 0:
+            raise ValueError("cannot multiply ParserElement by 0 or (0,0)")
+
+        if (optElements):
+            def makeOptionalList(n):
+                if n>1:
+                    return Optional(self + makeOptionalList(n-1))
+                else:
+                    return Optional(self)
+            if minElements:
+                if minElements == 1:
+                    ret = self + makeOptionalList(optElements)
+                else:
+                    ret = And([self]*minElements) + makeOptionalList(optElements)
+            else:
+                ret = makeOptionalList(optElements)
+        else:
+            if minElements == 1:
+                ret = self
+            else:
+                ret = And([self]*minElements)
+        return ret
+
+    def __rmul__(self, other):
+        return self.__mul__(other)
+
+    def __or__(self, other ):
+        """
+        Implementation of | operator - returns C{L{MatchFirst}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return MatchFirst( [ self, other ] )
+
+    def __ror__(self, other ):
+        """
+        Implementation of | operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other | self
+
+    def __xor__(self, other ):
+        """
+        Implementation of ^ operator - returns C{L{Or}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Or( [ self, other ] )
+
+    def __rxor__(self, other ):
+        """
+        Implementation of ^ operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other ^ self
+
+    def __and__(self, other ):
+        """
+        Implementation of & operator - returns C{L{Each}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return Each( [ self, other ] )
+
+    def __rand__(self, other ):
+        """
+        Implementation of & operator when left operand is not a C{L{ParserElement}}
+        """
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        if not isinstance( other, ParserElement ):
+            warnings.warn("Cannot combine element of type %s with ParserElement" % type(other),
+                    SyntaxWarning, stacklevel=2)
+            return None
+        return other & self
+
+    def __invert__( self ):
+        """
+        Implementation of ~ operator - returns C{L{NotAny}}
+        """
+        return NotAny( self )
+
+    def __call__(self, name=None):
+        """
+        Shortcut for C{L{setResultsName}}, with C{listAllMatches=False}.
+        
+        If C{name} is given with a trailing C{'*'} character, then C{listAllMatches} will be
+        passed as C{True}.
+           
+        If C{name} is omitted, same as calling C{L{copy}}.
+
+        Example::
+            # these are equivalent
+            userdata = Word(alphas).setResultsName("name") + Word(nums+"-").setResultsName("socsecno")
+            userdata = Word(alphas)("name") + Word(nums+"-")("socsecno")             
+        """
+        if name is not None:
+            return self.setResultsName(name)
+        else:
+            return self.copy()
+
+    def suppress( self ):
+        """
+        Suppresses the output of this C{ParserElement}; useful to keep punctuation from
+        cluttering up returned output.
+        """
+        return Suppress( self )
+
+    def leaveWhitespace( self ):
+        """
+        Disables the skipping of whitespace before matching the characters in the
+        C{ParserElement}'s defined pattern.  This is normally only used internally by
+        the pyparsing module, but may be needed in some whitespace-sensitive grammars.
+        """
+        self.skipWhitespace = False
+        return self
+
+    def setWhitespaceChars( self, chars ):
+        """
+        Overrides the default whitespace chars
+        """
+        self.skipWhitespace = True
+        self.whiteChars = chars
+        self.copyDefaultWhiteChars = False
+        return self
+
+    def parseWithTabs( self ):
+        """
+        Overrides default behavior to expand C{<TAB>}s to spaces before parsing the input string.
+        Must be called before C{parseString} when the input grammar contains elements that
+        match C{<TAB>} characters.
+        """
+        self.keepTabs = True
+        return self
+
+    def ignore( self, other ):
+        """
+        Define expression to be ignored (e.g., comments) while doing pattern
+        matching; may be called repeatedly, to define multiple comment or other
+        ignorable patterns.
+        
+        Example::
+            patt = OneOrMore(Word(alphas))
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj']
+            
+            patt.ignore(cStyleComment)
+            patt.parseString('ablaj /* comment */ lskjd') # -> ['ablaj', 'lskjd']
+        """
+        if isinstance(other, basestring):
+            other = Suppress(other)
+
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                self.ignoreExprs.append(other)
+        else:
+            self.ignoreExprs.append( Suppress( other.copy() ) )
+        return self
+
+    def setDebugActions( self, startAction, successAction, exceptionAction ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        """
+        self.debugActions = (startAction or _defaultStartDebugAction,
+                             successAction or _defaultSuccessDebugAction,
+                             exceptionAction or _defaultExceptionDebugAction)
+        self.debug = True
+        return self
+
+    def setDebug( self, flag=True ):
+        """
+        Enable display of debugging messages while doing pattern matching.
+        Set C{flag} to True to enable, False to disable.
+
+        Example::
+            wd = Word(alphas).setName("alphaword")
+            integer = Word(nums).setName("numword")
+            term = wd | integer
+            
+            # turn on debugging for wd
+            wd.setDebug()
+
+            OneOrMore(term).parseString("abc 123 xyz 890")
+        
+        prints::
+            Match alphaword at loc 0(1,1)
+            Matched alphaword -> ['abc']
+            Match alphaword at loc 3(1,4)
+            Exception raised:Expected alphaword (at char 4), (line:1, col:5)
+            Match alphaword at loc 7(1,8)
+            Matched alphaword -> ['xyz']
+            Match alphaword at loc 11(1,12)
+            Exception raised:Expected alphaword (at char 12), (line:1, col:13)
+            Match alphaword at loc 15(1,16)
+            Exception raised:Expected alphaword (at char 15), (line:1, col:16)
+
+        The output shown is that produced by the default debug actions - custom debug actions can be
+        specified using L{setDebugActions}. Prior to attempting
+        to match the C{wd} expression, the debugging message C{"Match <exprname> at loc <n>(<line>,<col>)"}
+        is shown. Then if the parse succeeds, a C{"Matched"} message is shown, or an C{"Exception raised"}
+        message is shown. Also note the use of L{setName} to assign a human-readable name to the expression,
+        which makes debugging and exception messages easier to understand - for instance, the default
+        name created for the C{Word} expression without calling C{setName} is C{"W:(ABCD...)"}.
+        """
+        if flag:
+            self.setDebugActions( _defaultStartDebugAction, _defaultSuccessDebugAction, _defaultExceptionDebugAction )
+        else:
+            self.debug = False
+        return self
+
+    def __str__( self ):
+        return self.name
+
+    def __repr__( self ):
+        return _ustr(self)
+
+    def streamline( self ):
+        self.streamlined = True
+        self.strRepr = None
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        pass
+
+    def validate( self, validateTrace=[] ):
+        """
+        Check defined expressions for valid structure, check for infinite recursive definitions.
+        """
+        self.checkRecursion( [] )
+
+    def parseFile( self, file_or_filename, parseAll=False ):
+        """
+        Execute the parse expression on the given file or filename.
+        If a filename is specified (instead of a file object),
+        the entire file is opened, read, and closed before parsing.
+        """
+        try:
+            file_contents = file_or_filename.read()
+        except AttributeError:
+            with open(file_or_filename, "r") as f:
+                file_contents = f.read()
+        try:
+            return self.parseString(file_contents, parseAll)
+        except ParseBaseException as exc:
+            if ParserElement.verbose_stacktrace:
+                raise
+            else:
+                # catch and re-raise exception from here, clears out pyparsing internal stack trace
+                raise exc
+
+    def __eq__(self,other):
+        if isinstance(other, ParserElement):
+            return self is other or vars(self) == vars(other)
+        elif isinstance(other, basestring):
+            return self.matches(other)
+        else:
+            return super(ParserElement,self)==other
+
+    def __ne__(self,other):
+        return not (self == other)
+
+    def __hash__(self):
+        return hash(id(self))
+
+    def __req__(self,other):
+        return self == other
+
+    def __rne__(self,other):
+        return not (self == other)
+
+    def matches(self, testString, parseAll=True):
+        """
+        Method for quick testing of a parser against a test string. Good for simple 
+        inline microtests of sub expressions while building up larger parser.
+           
+        Parameters:
+         - testString - to test against this expression for a match
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests
+            
+        Example::
+            expr = Word(nums)
+            assert expr.matches("100")
+        """
+        try:
+            self.parseString(_ustr(testString), parseAll=parseAll)
+            return True
+        except ParseBaseException:
+            return False
+                
+    def runTests(self, tests, parseAll=True, comment='#', fullDump=True, printResults=True, failureTests=False):
+        """
+        Execute the parse expression on a series of test strings, showing each
+        test, the parsed results or where the parse failed. Quick and easy way to
+        run a parse expression against a list of sample strings.
+           
+        Parameters:
+         - tests - a list of separate test strings, or a multiline string of test strings
+         - parseAll - (default=C{True}) - flag to pass to C{L{parseString}} when running tests           
+         - comment - (default=C{'#'}) - expression for indicating embedded comments in the test 
+              string; pass None to disable comment filtering
+         - fullDump - (default=C{True}) - dump results as list followed by results names in nested outline;
+              if False, only dump nested list
+         - printResults - (default=C{True}) prints test output to stdout
+         - failureTests - (default=C{False}) indicates if these tests are expected to fail parsing
+
+        Returns: a (success, results) tuple, where success indicates that all tests succeeded
+        (or failed if C{failureTests} is True), and the results contain a list of lines of each 
+        test's output
+        
+        Example::
+            number_expr = pyparsing_common.number.copy()
+
+            result = number_expr.runTests('''
+                # unsigned integer
+                100
+                # negative integer
+                -100
+                # float with scientific notation
+                6.02e23
+                # integer with scientific notation
+                1e-12
+                ''')
+            print("Success" if result[0] else "Failed!")
+
+            result = number_expr.runTests('''
+                # stray character
+                100Z
+                # missing leading digit before '.'
+                -.100
+                # too many '.'
+                3.14.159
+                ''', failureTests=True)
+            print("Success" if result[0] else "Failed!")
+        prints::
+            # unsigned integer
+            100
+            [100]
+
+            # negative integer
+            -100
+            [-100]
+
+            # float with scientific notation
+            6.02e23
+            [6.02e+23]
+
+            # integer with scientific notation
+            1e-12
+            [1e-12]
+
+            Success
+            
+            # stray character
+            100Z
+               ^
+            FAIL: Expected end of text (at char 3), (line:1, col:4)
+
+            # missing leading digit before '.'
+            -.100
+            ^
+            FAIL: Expected {real number with scientific notation | real number | signed integer} (at char 0), (line:1, col:1)
+
+            # too many '.'
+            3.14.159
+                ^
+            FAIL: Expected end of text (at char 4), (line:1, col:5)
+
+            Success
+
+        Each test string must be on a single line. If you want to test a string that spans multiple
+        lines, create a test like this::
+
+            expr.runTest(r"this is a test\\n of strings that spans \\n 3 lines")
+        
+        (Note that this is a raw string literal, you must include the leading 'r'.)
+        """
+        if isinstance(tests, basestring):
+            tests = list(map(str.strip, tests.rstrip().splitlines()))
+        if isinstance(comment, basestring):
+            comment = Literal(comment)
+        allResults = []
+        comments = []
+        success = True
+        for t in tests:
+            if comment is not None and comment.matches(t, False) or comments and not t:
+                comments.append(t)
+                continue
+            if not t:
+                continue
+            out = ['\n'.join(comments), t]
+            comments = []
+            try:
+                t = t.replace(r'\n','\n')
+                result = self.parseString(t, parseAll=parseAll)
+                out.append(result.dump(full=fullDump))
+                success = success and not failureTests
+            except ParseBaseException as pe:
+                fatal = "(FATAL)" if isinstance(pe, ParseFatalException) else ""
+                if '\n' in t:
+                    out.append(line(pe.loc, t))
+                    out.append(' '*(col(pe.loc,t)-1) + '^' + fatal)
+                else:
+                    out.append(' '*pe.loc + '^' + fatal)
+                out.append("FAIL: " + str(pe))
+                success = success and failureTests
+                result = pe
+            except Exception as exc:
+                out.append("FAIL-EXCEPTION: " + str(exc))
+                success = success and failureTests
+                result = exc
+
+            if printResults:
+                if fullDump:
+                    out.append('')
+                print('\n'.join(out))
+
+            allResults.append((t, result))
+        
+        return success, allResults
+
+        
+class Token(ParserElement):
+    """
+    Abstract C{ParserElement} subclass, for defining atomic matching patterns.
+    """
+    def __init__( self ):
+        super(Token,self).__init__( savelist=False )
+
+
+class Empty(Token):
+    """
+    An empty token, will always match.
+    """
+    def __init__( self ):
+        super(Empty,self).__init__()
+        self.name = "Empty"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+
+class NoMatch(Token):
+    """
+    A token that will never match.
+    """
+    def __init__( self ):
+        super(NoMatch,self).__init__()
+        self.name = "NoMatch"
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.errmsg = "Unmatchable token"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Literal(Token):
+    """
+    Token to exactly match a specified string.
+    
+    Example::
+        Literal('blah').parseString('blah')  # -> ['blah']
+        Literal('blah').parseString('blahfooblah')  # -> ['blah']
+        Literal('blah').parseString('bla')  # -> Exception: Expected "blah"
+    
+    For case-insensitive matching, use L{CaselessLiteral}.
+    
+    For keyword matching (force word break before and after the matched string),
+    use L{Keyword} or L{CaselessKeyword}.
+    """
+    def __init__( self, matchString ):
+        super(Literal,self).__init__()
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Literal; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+            self.__class__ = Empty
+        self.name = '"%s"' % _ustr(self.match)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+
+    # Performance tuning: this routine gets called a *lot*
+    # if this is a single character match string  and the first character matches,
+    # short-circuit as quickly as possible, and avoid calling startswith
+    #~ @profile
+    def parseImpl( self, instring, loc, doActions=True ):
+        if (instring[loc] == self.firstMatchChar and
+            (self.matchLen==1 or instring.startswith(self.match,loc)) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+_L = Literal
+ParserElement._literalStringClass = Literal
+
+class Keyword(Token):
+    """
+    Token to exactly match a specified string as a keyword, that is, it must be
+    immediately followed by a non-keyword character.  Compare with C{L{Literal}}:
+     - C{Literal("if")} will match the leading C{'if'} in C{'ifAndOnlyIf'}.
+     - C{Keyword("if")} will not; it will only match the leading C{'if'} in C{'if x=1'}, or C{'if(y==2)'}
+    Accepts two optional constructor arguments in addition to the keyword string:
+     - C{identChars} is a string of characters that would be valid identifier characters,
+          defaulting to all alphanumerics + "_" and "$"
+     - C{caseless} allows case-insensitive matching, default is C{False}.
+       
+    Example::
+        Keyword("start").parseString("start")  # -> ['start']
+        Keyword("start").parseString("starting")  # -> Exception
+
+    For case-insensitive matching, use L{CaselessKeyword}.
+    """
+    DEFAULT_KEYWORD_CHARS = alphanums+"_$"
+
+    def __init__( self, matchString, identChars=None, caseless=False ):
+        super(Keyword,self).__init__()
+        if identChars is None:
+            identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        self.match = matchString
+        self.matchLen = len(matchString)
+        try:
+            self.firstMatchChar = matchString[0]
+        except IndexError:
+            warnings.warn("null string passed to Keyword; use Empty() instead",
+                            SyntaxWarning, stacklevel=2)
+        self.name = '"%s"' % self.match
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = False
+        self.mayIndexError = False
+        self.caseless = caseless
+        if caseless:
+            self.caselessmatch = matchString.upper()
+            identChars = identChars.upper()
+        self.identChars = set(identChars)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.caseless:
+            if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+                 (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) and
+                 (loc == 0 or instring[loc-1].upper() not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        else:
+            if (instring[loc] == self.firstMatchChar and
+                (self.matchLen==1 or instring.startswith(self.match,loc)) and
+                (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen] not in self.identChars) and
+                (loc == 0 or instring[loc-1] not in self.identChars) ):
+                return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+    def copy(self):
+        c = super(Keyword,self).copy()
+        c.identChars = Keyword.DEFAULT_KEYWORD_CHARS
+        return c
+
+    @staticmethod
+    def setDefaultKeywordChars( chars ):
+        """Overrides the default Keyword chars
+        """
+        Keyword.DEFAULT_KEYWORD_CHARS = chars
+
+class CaselessLiteral(Literal):
+    """
+    Token to match a specified string, ignoring case of letters.
+    Note: the matched results will always be in the case of the given
+    match string, NOT the case of the input text.
+
+    Example::
+        OneOrMore(CaselessLiteral("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessKeyword}.)
+    """
+    def __init__( self, matchString ):
+        super(CaselessLiteral,self).__init__( matchString.upper() )
+        # Preserve the defining literal.
+        self.returnString = matchString
+        self.name = "'%s'" % self.returnString
+        self.errmsg = "Expected " + self.name
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[ loc:loc+self.matchLen ].upper() == self.match:
+            return loc+self.matchLen, self.returnString
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CaselessKeyword(Keyword):
+    """
+    Caseless version of L{Keyword}.
+
+    Example::
+        OneOrMore(CaselessKeyword("CMD")).parseString("cmd CMD Cmd10") # -> ['CMD', 'CMD']
+        
+    (Contrast with example for L{CaselessLiteral}.)
+    """
+    def __init__( self, matchString, identChars=None ):
+        super(CaselessKeyword,self).__init__( matchString, identChars, caseless=True )
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if ( (instring[ loc:loc+self.matchLen ].upper() == self.caselessmatch) and
+             (loc >= len(instring)-self.matchLen or instring[loc+self.matchLen].upper() not in self.identChars) ):
+            return loc+self.matchLen, self.match
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class CloseMatch(Token):
+    """
+    A variation on L{Literal} which matches "close" matches, that is, 
+    strings with at most 'n' mismatching characters. C{CloseMatch} takes parameters:
+     - C{match_string} - string to be matched
+     - C{maxMismatches} - (C{default=1}) maximum number of mismatches allowed to count as a match
+    
+    The results from a successful parse will contain the matched text from the input string and the following named results:
+     - C{mismatches} - a list of the positions within the match_string where mismatches were found
+     - C{original} - the original match_string used to compare against the input string
+    
+    If C{mismatches} is an empty list, then the match was an exact match.
+    
+    Example::
+        patt = CloseMatch("ATCATCGAATGGA")
+        patt.parseString("ATCATCGAAXGGA") # -> (['ATCATCGAAXGGA'], {'mismatches': [[9]], 'original': ['ATCATCGAATGGA']})
+        patt.parseString("ATCAXCGAAXGGA") # -> Exception: Expected 'ATCATCGAATGGA' (with up to 1 mismatches) (at char 0), (line:1, col:1)
+
+        # exact match
+        patt.parseString("ATCATCGAATGGA") # -> (['ATCATCGAATGGA'], {'mismatches': [[]], 'original': ['ATCATCGAATGGA']})
+
+        # close match allowing up to 2 mismatches
+        patt = CloseMatch("ATCATCGAATGGA", maxMismatches=2)
+        patt.parseString("ATCAXCGAAXGGA") # -> (['ATCAXCGAAXGGA'], {'mismatches': [[4, 9]], 'original': ['ATCATCGAATGGA']})
+    """
+    def __init__(self, match_string, maxMismatches=1):
+        super(CloseMatch,self).__init__()
+        self.name = match_string
+        self.match_string = match_string
+        self.maxMismatches = maxMismatches
+        self.errmsg = "Expected %r (with up to %d mismatches)" % (self.match_string, self.maxMismatches)
+        self.mayIndexError = False
+        self.mayReturnEmpty = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        start = loc
+        instrlen = len(instring)
+        maxloc = start + len(self.match_string)
+
+        if maxloc <= instrlen:
+            match_string = self.match_string
+            match_stringloc = 0
+            mismatches = []
+            maxMismatches = self.maxMismatches
+
+            for match_stringloc,s_m in enumerate(zip(instring[loc:maxloc], self.match_string)):
+                src,mat = s_m
+                if src != mat:
+                    mismatches.append(match_stringloc)
+                    if len(mismatches) > maxMismatches:
+                        break
+            else:
+                loc = match_stringloc + 1
+                results = ParseResults([instring[start:loc]])
+                results['original'] = self.match_string
+                results['mismatches'] = mismatches
+                return loc, results
+
+        raise ParseException(instring, loc, self.errmsg, self)
+
+
+class Word(Token):
+    """
+    Token for matching words composed of allowed character sets.
+    Defined with string containing all allowed initial characters,
+    an optional string containing allowed body characters (if omitted,
+    defaults to the initial character set), and an optional minimum,
+    maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction. An optional
+    C{excludeChars} parameter can list characters that might be found in 
+    the input C{bodyChars} string; useful to define a word of all printables
+    except for one or two characters, for instance.
+    
+    L{srange} is useful for defining custom character set strings for defining 
+    C{Word} expressions, using range notation from regular expression character sets.
+    
+    A common mistake is to use C{Word} to match a specific literal string, as in 
+    C{Word("Address")}. Remember that C{Word} uses the string argument to define
+    I{sets} of matchable characters. This expression would match "Add", "AAA",
+    "dAred", or any other word made up of the characters 'A', 'd', 'r', 'e', and 's'.
+    To match an exact literal string, use L{Literal} or L{Keyword}.
+
+    pyparsing includes helper strings for building Words:
+     - L{alphas}
+     - L{nums}
+     - L{alphanums}
+     - L{hexnums}
+     - L{alphas8bit} (alphabetic characters in ASCII range 128-255 - accented, tilded, umlauted, etc.)
+     - L{punc8bit} (non-alphabetic characters in ASCII range 128-255 - currency, symbols, superscripts, diacriticals, etc.)
+     - L{printables} (any non-whitespace character)
+
+    Example::
+        # a word composed of digits
+        integer = Word(nums) # equivalent to Word("0123456789") or Word(srange("0-9"))
+        
+        # a word with a leading capital, and zero or more lowercase
+        capital_word = Word(alphas.upper(), alphas.lower())
+
+        # hostnames are alphanumeric, with leading alpha, and '-'
+        hostname = Word(alphas, alphanums+'-')
+        
+        # roman numeral (not a strict parser, accepts invalid mix of characters)
+        roman = Word("IVXLCDM")
+        
+        # any string of non-whitespace characters, except for ','
+        csv_value = Word(printables, excludeChars=",")
+    """
+    def __init__( self, initChars, bodyChars=None, min=1, max=0, exact=0, asKeyword=False, excludeChars=None ):
+        super(Word,self).__init__()
+        if excludeChars:
+            initChars = ''.join(c for c in initChars if c not in excludeChars)
+            if bodyChars:
+                bodyChars = ''.join(c for c in bodyChars if c not in excludeChars)
+        self.initCharsOrig = initChars
+        self.initChars = set(initChars)
+        if bodyChars :
+            self.bodyCharsOrig = bodyChars
+            self.bodyChars = set(bodyChars)
+        else:
+            self.bodyCharsOrig = initChars
+            self.bodyChars = set(initChars)
+
+        self.maxSpecified = max > 0
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(Word()) if zero-length word is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.asKeyword = asKeyword
+
+        if ' ' not in self.initCharsOrig+self.bodyCharsOrig and (min==1 and max==0 and exact==0):
+            if self.bodyCharsOrig == self.initCharsOrig:
+                self.reString = "[%s]+" % _escapeRegexRangeChars(self.initCharsOrig)
+            elif len(self.initCharsOrig) == 1:
+                self.reString = "%s[%s]*" % \
+                                      (re.escape(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            else:
+                self.reString = "[%s][%s]*" % \
+                                      (_escapeRegexRangeChars(self.initCharsOrig),
+                                      _escapeRegexRangeChars(self.bodyCharsOrig),)
+            if self.asKeyword:
+                self.reString = r"\b"+self.reString+r"\b"
+            try:
+                self.re = re.compile( self.reString )
+            except Exception:
+                self.re = None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.re:
+            result = self.re.match(instring,loc)
+            if not result:
+                raise ParseException(instring, loc, self.errmsg, self)
+
+            loc = result.end()
+            return loc, result.group()
+
+        if not(instring[ loc ] in self.initChars):
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        instrlen = len(instring)
+        bodychars = self.bodyChars
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, instrlen )
+        while loc < maxloc and instring[loc] in bodychars:
+            loc += 1
+
+        throwException = False
+        if loc - start < self.minLen:
+            throwException = True
+        if self.maxSpecified and loc < instrlen and instring[loc] in bodychars:
+            throwException = True
+        if self.asKeyword:
+            if (start>0 and instring[start-1] in bodychars) or (loc<instrlen and instring[loc] in bodychars):
+                throwException = True
+
+        if throwException:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(Word,self).__str__()
+        except Exception:
+            pass
+
+
+        if self.strRepr is None:
+
+            def charsAsStr(s):
+                if len(s)>4:
+                    return s[:4]+"..."
+                else:
+                    return s
+
+            if ( self.initCharsOrig != self.bodyCharsOrig ):
+                self.strRepr = "W:(%s,%s)" % ( charsAsStr(self.initCharsOrig), charsAsStr(self.bodyCharsOrig) )
+            else:
+                self.strRepr = "W:(%s)" % charsAsStr(self.initCharsOrig)
+
+        return self.strRepr
+
+
+class Regex(Token):
+    r"""
+    Token for matching strings that match a given regular expression.
+    Defined with string specifying the regular expression in a form recognized by the inbuilt Python re module.
+    If the given regex contains named groups (defined using C{(?P<name>...)}), these will be preserved as 
+    named parse results.
+
+    Example::
+        realnum = Regex(r"[+-]?\d+\.\d*")
+        date = Regex(r'(?P<year>\d{4})-(?P<month>\d\d?)-(?P<day>\d\d?)')
+        # ref: http://stackoverflow.com/questions/267399/how-do-you-match-only-valid-roman-numerals-with-a-regular-expression
+        roman = Regex(r"M{0,4}(CM|CD|D?C{0,3})(XC|XL|L?X{0,3})(IX|IV|V?I{0,3})")
+    """
+    compiledREtype = type(re.compile("[A-Z]"))
+    def __init__( self, pattern, flags=0):
+        """The parameters C{pattern} and C{flags} are passed to the C{re.compile()} function as-is. See the Python C{re} module for an explanation of the acceptable patterns and flags."""
+        super(Regex,self).__init__()
+
+        if isinstance(pattern, basestring):
+            if not pattern:
+                warnings.warn("null string passed to Regex; use Empty() instead",
+                        SyntaxWarning, stacklevel=2)
+
+            self.pattern = pattern
+            self.flags = flags
+
+            try:
+                self.re = re.compile(self.pattern, self.flags)
+                self.reString = self.pattern
+            except sre_constants.error:
+                warnings.warn("invalid pattern (%s) passed to Regex" % pattern,
+                    SyntaxWarning, stacklevel=2)
+                raise
+
+        elif isinstance(pattern, Regex.compiledREtype):
+            self.re = pattern
+            self.pattern = \
+            self.reString = str(pattern)
+            self.flags = flags
+            
+        else:
+            raise ValueError("Regex may only be constructed with a string or a compiled RE object")
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = self.re.match(instring,loc)
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        d = result.groupdict()
+        ret = ParseResults(result.group())
+        if d:
+            for k in d:
+                ret[k] = d[k]
+        return loc,ret
+
+    def __str__( self ):
+        try:
+            return super(Regex,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "Re:(%s)" % repr(self.pattern)
+
+        return self.strRepr
+
+
+class QuotedString(Token):
+    r"""
+    Token for matching strings that are delimited by quoting characters.
+    
+    Defined with the following parameters:
+        - quoteChar - string of one or more characters defining the quote delimiting string
+        - escChar - character to escape quotes, typically backslash (default=C{None})
+        - escQuote - special quote sequence to escape an embedded quote string (such as SQL's "" to escape an embedded ") (default=C{None})
+        - multiline - boolean indicating whether quotes can span multiple lines (default=C{False})
+        - unquoteResults - boolean indicating whether the matched text should be unquoted (default=C{True})
+        - endQuoteChar - string of one or more characters defining the end of the quote delimited string (default=C{None} => same as quoteChar)
+        - convertWhitespaceEscapes - convert escaped whitespace (C{'\t'}, C{'\n'}, etc.) to actual whitespace (default=C{True})
+
+    Example::
+        qs = QuotedString('"')
+        print(qs.searchString('lsjdf "This is the quote" sldjf'))
+        complex_qs = QuotedString('{{', endQuoteChar='}}')
+        print(complex_qs.searchString('lsjdf {{This is the "quote"}} sldjf'))
+        sql_qs = QuotedString('"', escQuote='""')
+        print(sql_qs.searchString('lsjdf "This is the quote with ""embedded"" quotes" sldjf'))
+    prints::
+        [['This is the quote']]
+        [['This is the "quote"']]
+        [['This is the quote with "embedded" quotes']]
+    """
+    def __init__( self, quoteChar, escChar=None, escQuote=None, multiline=False, unquoteResults=True, endQuoteChar=None, convertWhitespaceEscapes=True):
+        super(QuotedString,self).__init__()
+
+        # remove white space from quote chars - wont work anyway
+        quoteChar = quoteChar.strip()
+        if not quoteChar:
+            warnings.warn("quoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+            raise SyntaxError()
+
+        if endQuoteChar is None:
+            endQuoteChar = quoteChar
+        else:
+            endQuoteChar = endQuoteChar.strip()
+            if not endQuoteChar:
+                warnings.warn("endQuoteChar cannot be the empty string",SyntaxWarning,stacklevel=2)
+                raise SyntaxError()
+
+        self.quoteChar = quoteChar
+        self.quoteCharLen = len(quoteChar)
+        self.firstQuoteChar = quoteChar[0]
+        self.endQuoteChar = endQuoteChar
+        self.endQuoteCharLen = len(endQuoteChar)
+        self.escChar = escChar
+        self.escQuote = escQuote
+        self.unquoteResults = unquoteResults
+        self.convertWhitespaceEscapes = convertWhitespaceEscapes
+
+        if multiline:
+            self.flags = re.MULTILINE | re.DOTALL
+            self.pattern = r'%s(?:[^%s%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        else:
+            self.flags = 0
+            self.pattern = r'%s(?:[^%s\n\r%s]' % \
+                ( re.escape(self.quoteChar),
+                  _escapeRegexRangeChars(self.endQuoteChar[0]),
+                  (escChar is not None and _escapeRegexRangeChars(escChar) or '') )
+        if len(self.endQuoteChar) > 1:
+            self.pattern += (
+                '|(?:' + ')|(?:'.join("%s[^%s]" % (re.escape(self.endQuoteChar[:i]),
+                                               _escapeRegexRangeChars(self.endQuoteChar[i]))
+                                    for i in range(len(self.endQuoteChar)-1,0,-1)) + ')'
+                )
+        if escQuote:
+            self.pattern += (r'|(?:%s)' % re.escape(escQuote))
+        if escChar:
+            self.pattern += (r'|(?:%s.)' % re.escape(escChar))
+            self.escCharReplacePattern = re.escape(self.escChar)+"(.)"
+        self.pattern += (r')*%s' % re.escape(self.endQuoteChar))
+
+        try:
+            self.re = re.compile(self.pattern, self.flags)
+            self.reString = self.pattern
+        except sre_constants.error:
+            warnings.warn("invalid pattern (%s) passed to Regex" % self.pattern,
+                SyntaxWarning, stacklevel=2)
+            raise
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayIndexError = False
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        result = instring[loc] == self.firstQuoteChar and self.re.match(instring,loc) or None
+        if not result:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        loc = result.end()
+        ret = result.group()
+
+        if self.unquoteResults:
+
+            # strip off quotes
+            ret = ret[self.quoteCharLen:-self.endQuoteCharLen]
+
+            if isinstance(ret,basestring):
+                # replace escaped whitespace
+                if '\\' in ret and self.convertWhitespaceEscapes:
+                    ws_map = {
+                        r'\t' : '\t',
+                        r'\n' : '\n',
+                        r'\f' : '\f',
+                        r'\r' : '\r',
+                    }
+                    for wslit,wschar in ws_map.items():
+                        ret = ret.replace(wslit, wschar)
+
+                # replace escaped characters
+                if self.escChar:
+                    ret = re.sub(self.escCharReplacePattern, r"\g<1>", ret)
+
+                # replace escaped quotes
+                if self.escQuote:
+                    ret = ret.replace(self.escQuote, self.endQuoteChar)
+
+        return loc, ret
+
+    def __str__( self ):
+        try:
+            return super(QuotedString,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "quoted string, starting with %s ending with %s" % (self.quoteChar, self.endQuoteChar)
+
+        return self.strRepr
+
+
+class CharsNotIn(Token):
+    """
+    Token for matching words composed of characters I{not} in a given set (will
+    include whitespace in matched characters if not listed in the provided exclusion set - see example).
+    Defined with string containing all disallowed characters, and an optional
+    minimum, maximum, and/or exact length.  The default value for C{min} is 1 (a
+    minimum value < 1 is not valid); the default values for C{max} and C{exact}
+    are 0, meaning no maximum or exact length restriction.
+
+    Example::
+        # define a comma-separated-value as anything that is not a ','
+        csv_value = CharsNotIn(',')
+        print(delimitedList(csv_value).parseString("dkls,lsdkjf,s12 34,@!#,213"))
+    prints::
+        ['dkls', 'lsdkjf', 's12 34', '@!#', '213']
+    """
+    def __init__( self, notChars, min=1, max=0, exact=0 ):
+        super(CharsNotIn,self).__init__()
+        self.skipWhitespace = False
+        self.notChars = notChars
+
+        if min < 1:
+            raise ValueError("cannot specify a minimum length < 1; use Optional(CharsNotIn()) if zero-length char group is permitted")
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+        self.name = _ustr(self)
+        self.errmsg = "Expected " + self.name
+        self.mayReturnEmpty = ( self.minLen == 0 )
+        self.mayIndexError = False
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if instring[loc] in self.notChars:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        start = loc
+        loc += 1
+        notchars = self.notChars
+        maxlen = min( start+self.maxLen, len(instring) )
+        while loc < maxlen and \
+              (instring[loc] not in notchars):
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+    def __str__( self ):
+        try:
+            return super(CharsNotIn, self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            if len(self.notChars) > 4:
+                self.strRepr = "!W:(%s...)" % self.notChars[:4]
+            else:
+                self.strRepr = "!W:(%s)" % self.notChars
+
+        return self.strRepr
+
+class White(Token):
+    """
+    Special matching class for matching whitespace.  Normally, whitespace is ignored
+    by pyparsing grammars.  This class is included when some whitespace structures
+    are significant.  Define with a string containing the whitespace characters to be
+    matched; default is C{" \\t\\r\\n"}.  Also takes optional C{min}, C{max}, and C{exact} arguments,
+    as defined for the C{L{Word}} class.
+    """
+    whiteStrs = {
+        " " : "<SPC>",
+        "\t": "<TAB>",
+        "\n": "<LF>",
+        "\r": "<CR>",
+        "\f": "<FF>",
+        }
+    def __init__(self, ws=" \t\r\n", min=1, max=0, exact=0):
+        super(White,self).__init__()
+        self.matchWhite = ws
+        self.setWhitespaceChars( "".join(c for c in self.whiteChars if c not in self.matchWhite) )
+        #~ self.leaveWhitespace()
+        self.name = ("".join(White.whiteStrs[c] for c in self.matchWhite))
+        self.mayReturnEmpty = True
+        self.errmsg = "Expected " + self.name
+
+        self.minLen = min
+
+        if max > 0:
+            self.maxLen = max
+        else:
+            self.maxLen = _MAX_INT
+
+        if exact > 0:
+            self.maxLen = exact
+            self.minLen = exact
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if not(instring[ loc ] in self.matchWhite):
+            raise ParseException(instring, loc, self.errmsg, self)
+        start = loc
+        loc += 1
+        maxloc = start + self.maxLen
+        maxloc = min( maxloc, len(instring) )
+        while loc < maxloc and instring[loc] in self.matchWhite:
+            loc += 1
+
+        if loc - start < self.minLen:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        return loc, instring[start:loc]
+
+
+class _PositionToken(Token):
+    def __init__( self ):
+        super(_PositionToken,self).__init__()
+        self.name=self.__class__.__name__
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+
+class GoToColumn(_PositionToken):
+    """
+    Token to advance to a specific column of input text; useful for tabular report scraping.
+    """
+    def __init__( self, colno ):
+        super(GoToColumn,self).__init__()
+        self.col = colno
+
+    def preParse( self, instring, loc ):
+        if col(loc,instring) != self.col:
+            instrlen = len(instring)
+            if self.ignoreExprs:
+                loc = self._skipIgnorables( instring, loc )
+            while loc < instrlen and instring[loc].isspace() and col( loc, instring ) != self.col :
+                loc += 1
+        return loc
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        thiscol = col( loc, instring )
+        if thiscol > self.col:
+            raise ParseException( instring, loc, "Text not in expected column", self )
+        newloc = loc + self.col - thiscol
+        ret = instring[ loc: newloc ]
+        return newloc, ret
+
+
+class LineStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of a line within the parse string
+    
+    Example::
+    
+        test = '''\
+        AAA this line
+        AAA and this line
+          AAA but not this one
+        B AAA and definitely not this one
+        '''
+
+        for t in (LineStart() + 'AAA' + restOfLine).searchString(test):
+            print(t)
+    
+    Prints::
+        ['AAA', ' this line']
+        ['AAA', ' and this line']    
+
+    """
+    def __init__( self ):
+        super(LineStart,self).__init__()
+        self.errmsg = "Expected start of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if col(loc, instring) == 1:
+            return loc, []
+        raise ParseException(instring, loc, self.errmsg, self)
+
+class LineEnd(_PositionToken):
+    """
+    Matches if current position is at the end of a line within the parse string
+    """
+    def __init__( self ):
+        super(LineEnd,self).__init__()
+        self.setWhitespaceChars( ParserElement.DEFAULT_WHITE_CHARS.replace("\n","") )
+        self.errmsg = "Expected end of line"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc<len(instring):
+            if instring[loc] == "\n":
+                return loc+1, "\n"
+            else:
+                raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class StringStart(_PositionToken):
+    """
+    Matches if current position is at the beginning of the parse string
+    """
+    def __init__( self ):
+        super(StringStart,self).__init__()
+        self.errmsg = "Expected start of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc != 0:
+            # see if entire string up to here is just whitespace and ignoreables
+            if loc != self.preParse( instring, 0 ):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class StringEnd(_PositionToken):
+    """
+    Matches if current position is at the end of the parse string
+    """
+    def __init__( self ):
+        super(StringEnd,self).__init__()
+        self.errmsg = "Expected end of text"
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if loc < len(instring):
+            raise ParseException(instring, loc, self.errmsg, self)
+        elif loc == len(instring):
+            return loc+1, []
+        elif loc > len(instring):
+            return loc, []
+        else:
+            raise ParseException(instring, loc, self.errmsg, self)
+
+class WordStart(_PositionToken):
+    """
+    Matches if the current position is at the beginning of a Word, and
+    is not preceded by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordStart(alphanums)}. C{WordStart} will also match at the beginning of
+    the string being parsed, or at the beginning of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordStart,self).__init__()
+        self.wordChars = set(wordChars)
+        self.errmsg = "Not at the start of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        if loc != 0:
+            if (instring[loc-1] in self.wordChars or
+                instring[loc] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+class WordEnd(_PositionToken):
+    """
+    Matches if the current position is at the end of a Word, and
+    is not followed by any character in a given set of C{wordChars}
+    (default=C{printables}). To emulate the C{\b} behavior of regular expressions,
+    use C{WordEnd(alphanums)}. C{WordEnd} will also match at the end of
+    the string being parsed, or at the end of a line.
+    """
+    def __init__(self, wordChars = printables):
+        super(WordEnd,self).__init__()
+        self.wordChars = set(wordChars)
+        self.skipWhitespace = False
+        self.errmsg = "Not at the end of a word"
+
+    def parseImpl(self, instring, loc, doActions=True ):
+        instrlen = len(instring)
+        if instrlen>0 and loc<instrlen:
+            if (instring[loc] in self.wordChars or
+                instring[loc-1] not in self.wordChars):
+                raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+
+class ParseExpression(ParserElement):
+    """
+    Abstract subclass of ParserElement, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(ParseExpression,self).__init__(savelist)
+        if isinstance( exprs, _generatorType ):
+            exprs = list(exprs)
+
+        if isinstance( exprs, basestring ):
+            self.exprs = [ ParserElement._literalStringClass( exprs ) ]
+        elif isinstance( exprs, Iterable ):
+            exprs = list(exprs)
+            # if sequence of strings provided, wrap with Literal
+            if all(isinstance(expr, basestring) for expr in exprs):
+                exprs = map(ParserElement._literalStringClass, exprs)
+            self.exprs = list(exprs)
+        else:
+            try:
+                self.exprs = list( exprs )
+            except TypeError:
+                self.exprs = [ exprs ]
+        self.callPreparse = False
+
+    def __getitem__( self, i ):
+        return self.exprs[i]
+
+    def append( self, other ):
+        self.exprs.append( other )
+        self.strRepr = None
+        return self
+
+    def leaveWhitespace( self ):
+        """Extends C{leaveWhitespace} defined in base class, and also invokes C{leaveWhitespace} on
+           all contained expressions."""
+        self.skipWhitespace = False
+        self.exprs = [ e.copy() for e in self.exprs ]
+        for e in self.exprs:
+            e.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseExpression, self).ignore( other )
+                for e in self.exprs:
+                    e.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseExpression, self).ignore( other )
+            for e in self.exprs:
+                e.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def __str__( self ):
+        try:
+            return super(ParseExpression,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.exprs) )
+        return self.strRepr
+
+    def streamline( self ):
+        super(ParseExpression,self).streamline()
+
+        for e in self.exprs:
+            e.streamline()
+
+        # collapse nested And's of the form And( And( And( a,b), c), d) to And( a,b,c,d )
+        # but only if there are no parse actions or resultsNames on the nested And's
+        # (likewise for Or's and MatchFirst's)
+        if ( len(self.exprs) == 2 ):
+            other = self.exprs[0]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = other.exprs[:] + [ self.exprs[1] ]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+            other = self.exprs[-1]
+            if ( isinstance( other, self.__class__ ) and
+                  not(other.parseAction) and
+                  other.resultsName is None and
+                  not other.debug ):
+                self.exprs = self.exprs[:-1] + other.exprs[:]
+                self.strRepr = None
+                self.mayReturnEmpty |= other.mayReturnEmpty
+                self.mayIndexError  |= other.mayIndexError
+
+        self.errmsg = "Expected " + _ustr(self)
+        
+        return self
+
+    def setResultsName( self, name, listAllMatches=False ):
+        ret = super(ParseExpression,self).setResultsName(name,listAllMatches)
+        return ret
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        for e in self.exprs:
+            e.validate(tmp)
+        self.checkRecursion( [] )
+        
+    def copy(self):
+        ret = super(ParseExpression,self).copy()
+        ret.exprs = [e.copy() for e in self.exprs]
+        return ret
+
+class And(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found in the given order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'+'} operator.
+    May also be constructed using the C{'-'} operator, which will suppress backtracking.
+
+    Example::
+        integer = Word(nums)
+        name_expr = OneOrMore(Word(alphas))
+
+        expr = And([integer("id"),name_expr("name"),integer("age")])
+        # more easily written as:
+        expr = integer("id") + name_expr("name") + integer("age")
+    """
+
+    class _ErrorStop(Empty):
+        def __init__(self, *args, **kwargs):
+            super(And._ErrorStop,self).__init__(*args, **kwargs)
+            self.name = '-'
+            self.leaveWhitespace()
+
+    def __init__( self, exprs, savelist = True ):
+        super(And,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.setWhitespaceChars( self.exprs[0].whiteChars )
+        self.skipWhitespace = self.exprs[0].skipWhitespace
+        self.callPreparse = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        # pass False as last arg to _parse for first element, since we already
+        # pre-parsed the string as part of our And pre-parsing
+        loc, resultlist = self.exprs[0]._parse( instring, loc, doActions, callPreParse=False )
+        errorStop = False
+        for e in self.exprs[1:]:
+            if isinstance(e, And._ErrorStop):
+                errorStop = True
+                continue
+            if errorStop:
+                try:
+                    loc, exprtokens = e._parse( instring, loc, doActions )
+                except ParseSyntaxException:
+                    raise
+                except ParseBaseException as pe:
+                    pe.__traceback__ = None
+                    raise ParseSyntaxException._from_exception(pe)
+                except IndexError:
+                    raise ParseSyntaxException(instring, len(instring), self.errmsg, self)
+            else:
+                loc, exprtokens = e._parse( instring, loc, doActions )
+            if exprtokens or exprtokens.haskeys():
+                resultlist += exprtokens
+        return loc, resultlist
+
+    def __iadd__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #And( [ self, other ] )
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+            if not e.mayReturnEmpty:
+                break
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+
+class Or(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the expression that matches the longest string will be used.
+    May be constructed using the C{'^'} operator.
+
+    Example::
+        # construct Or using '^' operator
+        
+        number = Word(nums) ^ Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789"))
+    prints::
+        [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(Or,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        matches = []
+        for e in self.exprs:
+            try:
+                loc2 = e.tryParse( instring, loc )
+            except ParseException as err:
+                err.__traceback__ = None
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+            else:
+                # save match among all matches, to retry longest to shortest
+                matches.append((loc2, e))
+
+        if matches:
+            matches.sort(key=lambda x: -x[0])
+            for _,e in matches:
+                try:
+                    return e._parse( instring, loc, doActions )
+                except ParseException as err:
+                    err.__traceback__ = None
+                    if err.loc > maxExcLoc:
+                        maxException = err
+                        maxExcLoc = err.loc
+
+        if maxException is not None:
+            maxException.msg = self.errmsg
+            raise maxException
+        else:
+            raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+
+    def __ixor__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #Or( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " ^ ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class MatchFirst(ParseExpression):
+    """
+    Requires that at least one C{ParseExpression} is found.
+    If two expressions match, the first one listed is the one that will match.
+    May be constructed using the C{'|'} operator.
+
+    Example::
+        # construct MatchFirst using '|' operator
+        
+        # watch the order of expressions to match
+        number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
+        print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]
+
+        # put more selective expression first
+        number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
+        print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]
+    """
+    def __init__( self, exprs, savelist = False ):
+        super(MatchFirst,self).__init__(exprs, savelist)
+        if self.exprs:
+            self.mayReturnEmpty = any(e.mayReturnEmpty for e in self.exprs)
+        else:
+            self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        maxExcLoc = -1
+        maxException = None
+        for e in self.exprs:
+            try:
+                ret = e._parse( instring, loc, doActions )
+                return ret
+            except ParseException as err:
+                if err.loc > maxExcLoc:
+                    maxException = err
+                    maxExcLoc = err.loc
+            except IndexError:
+                if len(instring) > maxExcLoc:
+                    maxException = ParseException(instring,len(instring),e.errmsg,self)
+                    maxExcLoc = len(instring)
+
+        # only got here if no expression matched, raise exception for match that made it the furthest
+        else:
+            if maxException is not None:
+                maxException.msg = self.errmsg
+                raise maxException
+            else:
+                raise ParseException(instring, loc, "no defined alternatives to match", self)
+
+    def __ior__(self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass( other )
+        return self.append( other ) #MatchFirst( [ self, other ] )
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " | ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class Each(ParseExpression):
+    """
+    Requires all given C{ParseExpression}s to be found, but in any order.
+    Expressions may be separated by whitespace.
+    May be constructed using the C{'&'} operator.
+
+    Example::
+        color = oneOf("RED ORANGE YELLOW GREEN BLUE PURPLE BLACK WHITE BROWN")
+        shape_type = oneOf("SQUARE CIRCLE TRIANGLE STAR HEXAGON OCTAGON")
+        integer = Word(nums)
+        shape_attr = "shape:" + shape_type("shape")
+        posn_attr = "posn:" + Group(integer("x") + ',' + integer("y"))("posn")
+        color_attr = "color:" + color("color")
+        size_attr = "size:" + integer("size")
+
+        # use Each (using operator '&') to accept attributes in any order 
+        # (shape and posn are required, color and size are optional)
+        shape_spec = shape_attr & posn_attr & Optional(color_attr) & Optional(size_attr)
+
+        shape_spec.runTests('''
+            shape: SQUARE color: BLACK posn: 100, 120
+            shape: CIRCLE size: 50 color: BLUE posn: 50,80
+            color:GREEN size:20 shape:TRIANGLE posn:20,40
+            '''
+            )
+    prints::
+        shape: SQUARE color: BLACK posn: 100, 120
+        ['shape:', 'SQUARE', 'color:', 'BLACK', 'posn:', ['100', ',', '120']]
+        - color: BLACK
+        - posn: ['100', ',', '120']
+          - x: 100
+          - y: 120
+        - shape: SQUARE
+
+
+        shape: CIRCLE size: 50 color: BLUE posn: 50,80
+        ['shape:', 'CIRCLE', 'size:', '50', 'color:', 'BLUE', 'posn:', ['50', ',', '80']]
+        - color: BLUE
+        - posn: ['50', ',', '80']
+          - x: 50
+          - y: 80
+        - shape: CIRCLE
+        - size: 50
+
+
+        color: GREEN size: 20 shape: TRIANGLE posn: 20,40
+        ['color:', 'GREEN', 'size:', '20', 'shape:', 'TRIANGLE', 'posn:', ['20', ',', '40']]
+        - color: GREEN
+        - posn: ['20', ',', '40']
+          - x: 20
+          - y: 40
+        - shape: TRIANGLE
+        - size: 20
+    """
+    def __init__( self, exprs, savelist = True ):
+        super(Each,self).__init__(exprs, savelist)
+        self.mayReturnEmpty = all(e.mayReturnEmpty for e in self.exprs)
+        self.skipWhitespace = True
+        self.initExprGroups = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.initExprGroups:
+            self.opt1map = dict((id(e.expr),e) for e in self.exprs if isinstance(e,Optional))
+            opt1 = [ e.expr for e in self.exprs if isinstance(e,Optional) ]
+            opt2 = [ e for e in self.exprs if e.mayReturnEmpty and not isinstance(e,Optional)]
+            self.optionals = opt1 + opt2
+            self.multioptionals = [ e.expr for e in self.exprs if isinstance(e,ZeroOrMore) ]
+            self.multirequired = [ e.expr for e in self.exprs if isinstance(e,OneOrMore) ]
+            self.required = [ e for e in self.exprs if not isinstance(e,(Optional,ZeroOrMore,OneOrMore)) ]
+            self.required += self.multirequired
+            self.initExprGroups = False
+        tmpLoc = loc
+        tmpReqd = self.required[:]
+        tmpOpt  = self.optionals[:]
+        matchOrder = []
+
+        keepMatching = True
+        while keepMatching:
+            tmpExprs = tmpReqd + tmpOpt + self.multioptionals + self.multirequired
+            failed = []
+            for e in tmpExprs:
+                try:
+                    tmpLoc = e.tryParse( instring, tmpLoc )
+                except ParseException:
+                    failed.append(e)
+                else:
+                    matchOrder.append(self.opt1map.get(id(e),e))
+                    if e in tmpReqd:
+                        tmpReqd.remove(e)
+                    elif e in tmpOpt:
+                        tmpOpt.remove(e)
+            if len(failed) == len(tmpExprs):
+                keepMatching = False
+
+        if tmpReqd:
+            missing = ", ".join(_ustr(e) for e in tmpReqd)
+            raise ParseException(instring,loc,"Missing one or more required elements (%s)" % missing )
+
+        # add any unmatched Optionals, in case they have default values defined
+        matchOrder += [e for e in self.exprs if isinstance(e,Optional) and e.expr in tmpOpt]
+
+        resultlist = []
+        for e in matchOrder:
+            loc,results = e._parse(instring,loc,doActions)
+            resultlist.append(results)
+
+        finalResults = sum(resultlist, ParseResults([]))
+        return loc, finalResults
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + " & ".join(_ustr(e) for e in self.exprs) + "}"
+
+        return self.strRepr
+
+    def checkRecursion( self, parseElementList ):
+        subRecCheckList = parseElementList[:] + [ self ]
+        for e in self.exprs:
+            e.checkRecursion( subRecCheckList )
+
+
+class ParseElementEnhance(ParserElement):
+    """
+    Abstract subclass of C{ParserElement}, for combining and post-processing parsed tokens.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(ParseElementEnhance,self).__init__(savelist)
+        if isinstance( expr, basestring ):
+            if issubclass(ParserElement._literalStringClass, Token):
+                expr = ParserElement._literalStringClass(expr)
+            else:
+                expr = ParserElement._literalStringClass(Literal(expr))
+        self.expr = expr
+        self.strRepr = None
+        if expr is not None:
+            self.mayIndexError = expr.mayIndexError
+            self.mayReturnEmpty = expr.mayReturnEmpty
+            self.setWhitespaceChars( expr.whiteChars )
+            self.skipWhitespace = expr.skipWhitespace
+            self.saveAsList = expr.saveAsList
+            self.callPreparse = expr.callPreparse
+            self.ignoreExprs.extend(expr.ignoreExprs)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr is not None:
+            return self.expr._parse( instring, loc, doActions, callPreParse=False )
+        else:
+            raise ParseException("",loc,self.errmsg,self)
+
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        self.expr = self.expr.copy()
+        if self.expr is not None:
+            self.expr.leaveWhitespace()
+        return self
+
+    def ignore( self, other ):
+        if isinstance( other, Suppress ):
+            if other not in self.ignoreExprs:
+                super( ParseElementEnhance, self).ignore( other )
+                if self.expr is not None:
+                    self.expr.ignore( self.ignoreExprs[-1] )
+        else:
+            super( ParseElementEnhance, self).ignore( other )
+            if self.expr is not None:
+                self.expr.ignore( self.ignoreExprs[-1] )
+        return self
+
+    def streamline( self ):
+        super(ParseElementEnhance,self).streamline()
+        if self.expr is not None:
+            self.expr.streamline()
+        return self
+
+    def checkRecursion( self, parseElementList ):
+        if self in parseElementList:
+            raise RecursiveGrammarException( parseElementList+[self] )
+        subRecCheckList = parseElementList[:] + [ self ]
+        if self.expr is not None:
+            self.expr.checkRecursion( subRecCheckList )
+
+    def validate( self, validateTrace=[] ):
+        tmp = validateTrace[:]+[self]
+        if self.expr is not None:
+            self.expr.validate(tmp)
+        self.checkRecursion( [] )
+
+    def __str__( self ):
+        try:
+            return super(ParseElementEnhance,self).__str__()
+        except Exception:
+            pass
+
+        if self.strRepr is None and self.expr is not None:
+            self.strRepr = "%s:(%s)" % ( self.__class__.__name__, _ustr(self.expr) )
+        return self.strRepr
+
+
+class FollowedBy(ParseElementEnhance):
+    """
+    Lookahead matching of the given parse expression.  C{FollowedBy}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression matches at the current
+    position.  C{FollowedBy} always returns a null token list.
+
+    Example::
+        # use FollowedBy to match a label only if it is followed by a ':'
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        OneOrMore(attr_expr).parseString("shape: SQUARE color: BLACK posn: upper left").pprint()
+    prints::
+        [['shape', 'SQUARE'], ['color', 'BLACK'], ['posn', 'upper left']]
+    """
+    def __init__( self, expr ):
+        super(FollowedBy,self).__init__(expr)
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self.expr.tryParse( instring, loc )
+        return loc, []
+
+
+class NotAny(ParseElementEnhance):
+    """
+    Lookahead to disallow matching with the given parse expression.  C{NotAny}
+    does I{not} advance the parsing position within the input string, it only
+    verifies that the specified parse expression does I{not} match at the current
+    position.  Also, C{NotAny} does I{not} skip over leading whitespace. C{NotAny}
+    always returns a null token list.  May be constructed using the '~' operator.
+
+    Example::
+        
+    """
+    def __init__( self, expr ):
+        super(NotAny,self).__init__(expr)
+        #~ self.leaveWhitespace()
+        self.skipWhitespace = False  # do NOT use self.leaveWhitespace(), don't want to propagate to exprs
+        self.mayReturnEmpty = True
+        self.errmsg = "Found unwanted token, "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        if self.expr.canParseNext(instring, loc):
+            raise ParseException(instring, loc, self.errmsg, self)
+        return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "~{" + _ustr(self.expr) + "}"
+
+        return self.strRepr
+
+class _MultipleMatch(ParseElementEnhance):
+    def __init__( self, expr, stopOn=None):
+        super(_MultipleMatch, self).__init__(expr)
+        self.saveAsList = True
+        ender = stopOn
+        if isinstance(ender, basestring):
+            ender = ParserElement._literalStringClass(ender)
+        self.not_ender = ~ender if ender is not None else None
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        self_expr_parse = self.expr._parse
+        self_skip_ignorables = self._skipIgnorables
+        check_ender = self.not_ender is not None
+        if check_ender:
+            try_not_ender = self.not_ender.tryParse
+        
+        # must be at least one (but first see if we are the stopOn sentinel;
+        # if so, fail)
+        if check_ender:
+            try_not_ender(instring, loc)
+        loc, tokens = self_expr_parse( instring, loc, doActions, callPreParse=False )
+        try:
+            hasIgnoreExprs = (not not self.ignoreExprs)
+            while 1:
+                if check_ender:
+                    try_not_ender(instring, loc)
+                if hasIgnoreExprs:
+                    preloc = self_skip_ignorables( instring, loc )
+                else:
+                    preloc = loc
+                loc, tmptokens = self_expr_parse( instring, preloc, doActions )
+                if tmptokens or tmptokens.haskeys():
+                    tokens += tmptokens
+        except (ParseException,IndexError):
+            pass
+
+        return loc, tokens
+        
+class OneOrMore(_MultipleMatch):
+    """
+    Repetition of one or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match one or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: BLACK"
+        OneOrMore(attr_expr).parseString(text).pprint()  # Fail! read 'color' as data instead of next label -> [['shape', 'SQUARE color']]
+
+        # use stopOn attribute for OneOrMore to avoid reading label string as part of the data
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        OneOrMore(attr_expr).parseString(text).pprint() # Better -> [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'BLACK']]
+        
+        # could also be written as
+        (attr_expr * (1,)).parseString(text).pprint()
+    """
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "{" + _ustr(self.expr) + "}..."
+
+        return self.strRepr
+
+class ZeroOrMore(_MultipleMatch):
+    """
+    Optional repetition of zero or more of the given expression.
+    
+    Parameters:
+     - expr - expression that must match zero or more times
+     - stopOn - (default=C{None}) - expression for a terminating sentinel
+          (only required if the sentinel would ordinarily match the repetition 
+          expression)          
+
+    Example: similar to L{OneOrMore}
+    """
+    def __init__( self, expr, stopOn=None):
+        super(ZeroOrMore,self).__init__(expr, stopOn=stopOn)
+        self.mayReturnEmpty = True
+        
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            return super(ZeroOrMore, self).parseImpl(instring, loc, doActions)
+        except (ParseException,IndexError):
+            return loc, []
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]..."
+
+        return self.strRepr
+
+class _NullToken(object):
+    def __bool__(self):
+        return False
+    __nonzero__ = __bool__
+    def __str__(self):
+        return ""
+
+_optionalNotMatched = _NullToken()
+class Optional(ParseElementEnhance):
+    """
+    Optional matching of the given expression.
+
+    Parameters:
+     - expr - expression that must match zero or more times
+     - default (optional) - value to be returned if the optional expression is not found.
+
+    Example::
+        # US postal code can be a 5-digit zip, plus optional 4-digit qualifier
+        zip = Combine(Word(nums, exact=5) + Optional('-' + Word(nums, exact=4)))
+        zip.runTests('''
+            # traditional ZIP code
+            12345
+            
+            # ZIP+4 form
+            12101-0001
+            
+            # invalid ZIP
+            98765-
+            ''')
+    prints::
+        # traditional ZIP code
+        12345
+        ['12345']
+
+        # ZIP+4 form
+        12101-0001
+        ['12101-0001']
+
+        # invalid ZIP
+        98765-
+             ^
+        FAIL: Expected end of text (at char 5), (line:1, col:6)
+    """
+    def __init__( self, expr, default=_optionalNotMatched ):
+        super(Optional,self).__init__( expr, savelist=False )
+        self.saveAsList = self.expr.saveAsList
+        self.defaultValue = default
+        self.mayReturnEmpty = True
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        try:
+            loc, tokens = self.expr._parse( instring, loc, doActions, callPreParse=False )
+        except (ParseException,IndexError):
+            if self.defaultValue is not _optionalNotMatched:
+                if self.expr.resultsName:
+                    tokens = ParseResults([ self.defaultValue ])
+                    tokens[self.expr.resultsName] = self.defaultValue
+                else:
+                    tokens = [ self.defaultValue ]
+            else:
+                tokens = []
+        return loc, tokens
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+
+        if self.strRepr is None:
+            self.strRepr = "[" + _ustr(self.expr) + "]"
+
+        return self.strRepr
+
+class SkipTo(ParseElementEnhance):
+    """
+    Token for skipping over all undefined text until the matched expression is found.
+
+    Parameters:
+     - expr - target expression marking the end of the data to be skipped
+     - include - (default=C{False}) if True, the target expression is also parsed 
+          (the skipped text and target expression are returned as a 2-element list).
+     - ignore - (default=C{None}) used to define grammars (typically quoted strings and 
+          comments) that might contain false matches to the target expression
+     - failOn - (default=C{None}) define expressions that are not allowed to be 
+          included in the skipped test; if found before the target expression is found, 
+          the SkipTo is not a match
+
+    Example::
+        report = '''
+            Outstanding Issues Report - 1 Jan 2000
+
+               # | Severity | Description                               |  Days Open
+            -----+----------+-------------------------------------------+-----------
+             101 | Critical | Intermittent system crash                 |          6
+              94 | Cosmetic | Spelling error on Login ('log|n')         |         14
+              79 | Minor    | System slow when running too many reports |         47
+            '''
+        integer = Word(nums)
+        SEP = Suppress('|')
+        # use SkipTo to simply match everything up until the next SEP
+        # - ignore quoted strings, so that a '|' character inside a quoted string does not match
+        # - parse action will call token.strip() for each matched token, i.e., the description body
+        string_data = SkipTo(SEP, ignore=quotedString)
+        string_data.setParseAction(tokenMap(str.strip))
+        ticket_expr = (integer("issue_num") + SEP 
+                      + string_data("sev") + SEP 
+                      + string_data("desc") + SEP 
+                      + integer("days_open"))
+        
+        for tkt in ticket_expr.searchString(report):
+            print tkt.dump()
+    prints::
+        ['101', 'Critical', 'Intermittent system crash', '6']
+        - days_open: 6
+        - desc: Intermittent system crash
+        - issue_num: 101
+        - sev: Critical
+        ['94', 'Cosmetic', "Spelling error on Login ('log|n')", '14']
+        - days_open: 14
+        - desc: Spelling error on Login ('log|n')
+        - issue_num: 94
+        - sev: Cosmetic
+        ['79', 'Minor', 'System slow when running too many reports', '47']
+        - days_open: 47
+        - desc: System slow when running too many reports
+        - issue_num: 79
+        - sev: Minor
+    """
+    def __init__( self, other, include=False, ignore=None, failOn=None ):
+        super( SkipTo, self ).__init__( other )
+        self.ignoreExpr = ignore
+        self.mayReturnEmpty = True
+        self.mayIndexError = False
+        self.includeMatch = include
+        self.asList = False
+        if isinstance(failOn, basestring):
+            self.failOn = ParserElement._literalStringClass(failOn)
+        else:
+            self.failOn = failOn
+        self.errmsg = "No match found for "+_ustr(self.expr)
+
+    def parseImpl( self, instring, loc, doActions=True ):
+        startloc = loc
+        instrlen = len(instring)
+        expr = self.expr
+        expr_parse = self.expr._parse
+        self_failOn_canParseNext = self.failOn.canParseNext if self.failOn is not None else None
+        self_ignoreExpr_tryParse = self.ignoreExpr.tryParse if self.ignoreExpr is not None else None
+        
+        tmploc = loc
+        while tmploc <= instrlen:
+            if self_failOn_canParseNext is not None:
+                # break if failOn expression matches
+                if self_failOn_canParseNext(instring, tmploc):
+                    break
+                    
+            if self_ignoreExpr_tryParse is not None:
+                # advance past ignore expressions
+                while 1:
+                    try:
+                        tmploc = self_ignoreExpr_tryParse(instring, tmploc)
+                    except ParseBaseException:
+                        break
+            
+            try:
+                expr_parse(instring, tmploc, doActions=False, callPreParse=False)
+            except (ParseException, IndexError):
+                # no match, advance loc in string
+                tmploc += 1
+            else:
+                # matched skipto expr, done
+                break
+
+        else:
+            # ran off the end of the input string without matching skipto expr, fail
+            raise ParseException(instring, loc, self.errmsg, self)
+
+        # build up return values
+        loc = tmploc
+        skiptext = instring[startloc:loc]
+        skipresult = ParseResults(skiptext)
+        
+        if self.includeMatch:
+            loc, mat = expr_parse(instring,loc,doActions,callPreParse=False)
+            skipresult += mat
+
+        return loc, skipresult
+
+class Forward(ParseElementEnhance):
+    """
+    Forward declaration of an expression to be defined later -
+    used for recursive grammars, such as algebraic infix notation.
+    When the expression is known, it is assigned to the C{Forward} variable using the '<<' operator.
+
+    Note: take care when assigning to C{Forward} not to overlook precedence of operators.
+    Specifically, '|' has a lower precedence than '<<', so that::
+        fwdExpr << a | b | c
+    will actually be evaluated as::
+        (fwdExpr << a) | b | c
+    thereby leaving b and c out as parseable alternatives.  It is recommended that you
+    explicitly group the values inserted into the C{Forward}::
+        fwdExpr << (a | b | c)
+    Converting to use the '<<=' operator instead will avoid this problem.
+
+    See L{ParseResults.pprint} for an example of a recursive parser created using
+    C{Forward}.
+    """
+    def __init__( self, other=None ):
+        super(Forward,self).__init__( other, savelist=False )
+
+    def __lshift__( self, other ):
+        if isinstance( other, basestring ):
+            other = ParserElement._literalStringClass(other)
+        self.expr = other
+        self.strRepr = None
+        self.mayIndexError = self.expr.mayIndexError
+        self.mayReturnEmpty = self.expr.mayReturnEmpty
+        self.setWhitespaceChars( self.expr.whiteChars )
+        self.skipWhitespace = self.expr.skipWhitespace
+        self.saveAsList = self.expr.saveAsList
+        self.ignoreExprs.extend(self.expr.ignoreExprs)
+        return self
+        
+    def __ilshift__(self, other):
+        return self << other
+    
+    def leaveWhitespace( self ):
+        self.skipWhitespace = False
+        return self
+
+    def streamline( self ):
+        if not self.streamlined:
+            self.streamlined = True
+            if self.expr is not None:
+                self.expr.streamline()
+        return self
+
+    def validate( self, validateTrace=[] ):
+        if self not in validateTrace:
+            tmp = validateTrace[:]+[self]
+            if self.expr is not None:
+                self.expr.validate(tmp)
+        self.checkRecursion([])
+
+    def __str__( self ):
+        if hasattr(self,"name"):
+            return self.name
+        return self.__class__.__name__ + ": ..."
+
+        # stubbed out for now - creates awful memory and perf issues
+        self._revertClass = self.__class__
+        self.__class__ = _ForwardNoRecurse
+        try:
+            if self.expr is not None:
+                retString = _ustr(self.expr)
+            else:
+                retString = "None"
+        finally:
+            self.__class__ = self._revertClass
+        return self.__class__.__name__ + ": " + retString
+
+    def copy(self):
+        if self.expr is not None:
+            return super(Forward,self).copy()
+        else:
+            ret = Forward()
+            ret <<= self
+            return ret
+
+class _ForwardNoRecurse(Forward):
+    def __str__( self ):
+        return "..."
+
+class TokenConverter(ParseElementEnhance):
+    """
+    Abstract subclass of C{ParseExpression}, for converting parsed results.
+    """
+    def __init__( self, expr, savelist=False ):
+        super(TokenConverter,self).__init__( expr )#, savelist )
+        self.saveAsList = False
+
+class Combine(TokenConverter):
+    """
+    Converter to concatenate all matching tokens to a single string.
+    By default, the matching patterns must also be contiguous in the input string;
+    this can be disabled by specifying C{'adjacent=False'} in the constructor.
+
+    Example::
+        real = Word(nums) + '.' + Word(nums)
+        print(real.parseString('3.1416')) # -> ['3', '.', '1416']
+        # will also erroneously match the following
+        print(real.parseString('3. 1416')) # -> ['3', '.', '1416']
+
+        real = Combine(Word(nums) + '.' + Word(nums))
+        print(real.parseString('3.1416')) # -> ['3.1416']
+        # no match when there are internal spaces
+        print(real.parseString('3. 1416')) # -> Exception: Expected W:(0123...)
+    """
+    def __init__( self, expr, joinString="", adjacent=True ):
+        super(Combine,self).__init__( expr )
+        # suppress whitespace-stripping in contained parse expressions, but re-enable it on the Combine itself
+        if adjacent:
+            self.leaveWhitespace()
+        self.adjacent = adjacent
+        self.skipWhitespace = True
+        self.joinString = joinString
+        self.callPreparse = True
+
+    def ignore( self, other ):
+        if self.adjacent:
+            ParserElement.ignore(self, other)
+        else:
+            super( Combine, self).ignore( other )
+        return self
+
+    def postParse( self, instring, loc, tokenlist ):
+        retToks = tokenlist.copy()
+        del retToks[:]
+        retToks += ParseResults([ "".join(tokenlist._asStringList(self.joinString)) ], modal=self.modalResults)
+
+        if self.resultsName and retToks.haskeys():
+            return [ retToks ]
+        else:
+            return retToks
+
+class Group(TokenConverter):
+    """
+    Converter to return the matched tokens as a list - useful for returning tokens of C{L{ZeroOrMore}} and C{L{OneOrMore}} expressions.
+
+    Example::
+        ident = Word(alphas)
+        num = Word(nums)
+        term = ident | num
+        func = ident + Optional(delimitedList(term))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', 'a', 'b', '100']
+
+        func = ident + Group(Optional(delimitedList(term)))
+        print(func.parseString("fn a,b,100"))  # -> ['fn', ['a', 'b', '100']]
+    """
+    def __init__( self, expr ):
+        super(Group,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        return [ tokenlist ]
+
+class Dict(TokenConverter):
+    """
+    Converter to return a repetitive expression as a list, but also as a dictionary.
+    Each element can also be referenced using the first token in the expression as its key.
+    Useful for tabular report scraping when the first column can be used as a item key.
+
+    Example::
+        data_word = Word(alphas)
+        label = data_word + FollowedBy(':')
+        attr_expr = Group(label + Suppress(':') + OneOrMore(data_word).setParseAction(' '.join))
+
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        
+        # print attributes as plain groups
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        # instead of OneOrMore(expr), parse using Dict(OneOrMore(Group(expr))) - Dict will auto-assign names
+        result = Dict(OneOrMore(Group(attr_expr))).parseString(text)
+        print(result.dump())
+        
+        # access named fields as dict entries, or output as dict
+        print(result['shape'])        
+        print(result.asDict())
+    prints::
+        ['shape', 'SQUARE', 'posn', 'upper left', 'color', 'light blue', 'texture', 'burlap']
+
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        {'color': 'light blue', 'posn': 'upper left', 'texture': 'burlap', 'shape': 'SQUARE'}
+    See more examples at L{ParseResults} of accessing fields by results name.
+    """
+    def __init__( self, expr ):
+        super(Dict,self).__init__( expr )
+        self.saveAsList = True
+
+    def postParse( self, instring, loc, tokenlist ):
+        for i,tok in enumerate(tokenlist):
+            if len(tok) == 0:
+                continue
+            ikey = tok[0]
+            if isinstance(ikey,int):
+                ikey = _ustr(tok[0]).strip()
+            if len(tok)==1:
+                tokenlist[ikey] = _ParseResultsWithOffset("",i)
+            elif len(tok)==2 and not isinstance(tok[1],ParseResults):
+                tokenlist[ikey] = _ParseResultsWithOffset(tok[1],i)
+            else:
+                dictvalue = tok.copy() #ParseResults(i)
+                del dictvalue[0]
+                if len(dictvalue)!= 1 or (isinstance(dictvalue,ParseResults) and dictvalue.haskeys()):
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue,i)
+                else:
+                    tokenlist[ikey] = _ParseResultsWithOffset(dictvalue[0],i)
+
+        if self.resultsName:
+            return [ tokenlist ]
+        else:
+            return tokenlist
+
+
+class Suppress(TokenConverter):
+    """
+    Converter for ignoring the results of a parsed expression.
+
+    Example::
+        source = "a, b, c,d"
+        wd = Word(alphas)
+        wd_list1 = wd + ZeroOrMore(',' + wd)
+        print(wd_list1.parseString(source))
+
+        # often, delimiters that are useful during parsing are just in the
+        # way afterward - use Suppress to keep them out of the parsed output
+        wd_list2 = wd + ZeroOrMore(Suppress(',') + wd)
+        print(wd_list2.parseString(source))
+    prints::
+        ['a', ',', 'b', ',', 'c', ',', 'd']
+        ['a', 'b', 'c', 'd']
+    (See also L{delimitedList}.)
+    """
+    def postParse( self, instring, loc, tokenlist ):
+        return []
+
+    def suppress( self ):
+        return self
+
+
+class OnlyOnce(object):
+    """
+    Wrapper for parse actions, to ensure they are only called once.
+    """
+    def __init__(self, methodCall):
+        self.callable = _trim_arity(methodCall)
+        self.called = False
+    def __call__(self,s,l,t):
+        if not self.called:
+            results = self.callable(s,l,t)
+            self.called = True
+            return results
+        raise ParseException(s,l,"")
+    def reset(self):
+        self.called = False
+
+def traceParseAction(f):
+    """
+    Decorator for debugging parse actions. 
+    
+    When the parse action is called, this decorator will print C{">> entering I{method-name}(line:I{current_source_line}, I{parse_location}, I{matched_tokens})".}
+    When the parse action completes, the decorator will print C{"<<"} followed by the returned value, or any exception that the parse action raised.
+
+    Example::
+        wd = Word(alphas)
+
+        @traceParseAction
+        def remove_duplicate_chars(tokens):
+            return ''.join(sorted(set(''.join(tokens))))
+
+        wds = OneOrMore(wd).setParseAction(remove_duplicate_chars)
+        print(wds.parseString("slkdjs sld sldd sdlf sdljf"))
+    prints::
+        >>entering remove_duplicate_chars(line: 'slkdjs sld sldd sdlf sdljf', 0, (['slkdjs', 'sld', 'sldd', 'sdlf', 'sdljf'], {}))
+        <<leaving remove_duplicate_chars (ret: 'dfjkls')
+        ['dfjkls']
+    """
+    f = _trim_arity(f)
+    def z(*paArgs):
+        thisFunc = f.__name__
+        s,l,t = paArgs[-3:]
+        if len(paArgs)>3:
+            thisFunc = paArgs[0].__class__.__name__ + '.' + thisFunc
+        sys.stderr.write( ">>entering %s(line: '%s', %d, %r)\n" % (thisFunc,line(l,s),l,t) )
+        try:
+            ret = f(*paArgs)
+        except Exception as exc:
+            sys.stderr.write( "<<leaving %s (exception: %s)\n" % (thisFunc,exc) )
+            raise
+        sys.stderr.write( "<<leaving %s (ret: %r)\n" % (thisFunc,ret) )
+        return ret
+    try:
+        z.__name__ = f.__name__
+    except AttributeError:
+        pass
+    return z
+
+#
+# global helpers
+#
+def delimitedList( expr, delim=",", combine=False ):
+    """
+    Helper to define a delimited list of expressions - the delimiter defaults to ','.
+    By default, the list elements and delimiters can have intervening whitespace, and
+    comments, but this can be overridden by passing C{combine=True} in the constructor.
+    If C{combine} is set to C{True}, the matching tokens are returned as a single token
+    string, with the delimiters included; otherwise, the matching tokens are returned
+    as a list of tokens, with the delimiters suppressed.
+
+    Example::
+        delimitedList(Word(alphas)).parseString("aa,bb,cc") # -> ['aa', 'bb', 'cc']
+        delimitedList(Word(hexnums), delim=':', combine=True).parseString("AA:BB:CC:DD:EE") # -> ['AA:BB:CC:DD:EE']
+    """
+    dlName = _ustr(expr)+" ["+_ustr(delim)+" "+_ustr(expr)+"]..."
+    if combine:
+        return Combine( expr + ZeroOrMore( delim + expr ) ).setName(dlName)
+    else:
+        return ( expr + ZeroOrMore( Suppress( delim ) + expr ) ).setName(dlName)
+
+def countedArray( expr, intExpr=None ):
+    """
+    Helper to define a counted list of expressions.
+    This helper defines a pattern of the form::
+        integer expr expr expr...
+    where the leading integer tells how many expr expressions follow.
+    The matched tokens returns the array of expr tokens as a list - the leading count token is suppressed.
+    
+    If C{intExpr} is specified, it should be a pyparsing expression that produces an integer value.
+
+    Example::
+        countedArray(Word(alphas)).parseString('2 ab cd ef')  # -> ['ab', 'cd']
+
+        # in this parser, the leading integer value is given in binary,
+        # '10' indicating that 2 values are in the array
+        binaryConstant = Word('01').setParseAction(lambda t: int(t[0], 2))
+        countedArray(Word(alphas), intExpr=binaryConstant).parseString('10 ab cd ef')  # -> ['ab', 'cd']
+    """
+    arrayExpr = Forward()
+    def countFieldParseAction(s,l,t):
+        n = t[0]
+        arrayExpr << (n and Group(And([expr]*n)) or Group(empty))
+        return []
+    if intExpr is None:
+        intExpr = Word(nums).setParseAction(lambda t:int(t[0]))
+    else:
+        intExpr = intExpr.copy()
+    intExpr.setName("arrayLen")
+    intExpr.addParseAction(countFieldParseAction, callDuringTry=True)
+    return ( intExpr + arrayExpr ).setName('(len) ' + _ustr(expr) + '...')
+
+def _flatten(L):
+    ret = []
+    for i in L:
+        if isinstance(i,list):
+            ret.extend(_flatten(i))
+        else:
+            ret.append(i)
+    return ret
+
+def matchPreviousLiteral(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousLiteral(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches a
+    previous literal, will also match the leading C{"1:1"} in C{"1:10"}.
+    If this is not desired, use C{matchPreviousExpr}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    def copyTokenToRepeater(s,l,t):
+        if t:
+            if len(t) == 1:
+                rep << t[0]
+            else:
+                # flatten t tokens
+                tflat = _flatten(t.asList())
+                rep << And(Literal(tt) for tt in tflat)
+        else:
+            rep << Empty()
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def matchPreviousExpr(expr):
+    """
+    Helper to define an expression that is indirectly defined from
+    the tokens matched in a previous expression, that is, it looks
+    for a 'repeat' of a previous expression.  For example::
+        first = Word(nums)
+        second = matchPreviousExpr(first)
+        matchExpr = first + ":" + second
+    will match C{"1:1"}, but not C{"1:2"}.  Because this matches by
+    expressions, will I{not} match the leading C{"1:1"} in C{"1:10"};
+    the expressions are evaluated first, and then compared, so
+    C{"1"} is compared with C{"10"}.
+    Do I{not} use with packrat parsing enabled.
+    """
+    rep = Forward()
+    e2 = expr.copy()
+    rep <<= e2
+    def copyTokenToRepeater(s,l,t):
+        matchTokens = _flatten(t.asList())
+        def mustMatchTheseTokens(s,l,t):
+            theseTokens = _flatten(t.asList())
+            if  theseTokens != matchTokens:
+                raise ParseException("",0,"")
+        rep.setParseAction( mustMatchTheseTokens, callDuringTry=True )
+    expr.addParseAction(copyTokenToRepeater, callDuringTry=True)
+    rep.setName('(prev) ' + _ustr(expr))
+    return rep
+
+def _escapeRegexRangeChars(s):
+    #~  escape these chars: ^-]
+    for c in r"\^-]":
+        s = s.replace(c,_bslash+c)
+    s = s.replace("\n",r"\n")
+    s = s.replace("\t",r"\t")
+    return _ustr(s)
+
+def oneOf( strs, caseless=False, useRegex=True ):
+    """
+    Helper to quickly define a set of alternative Literals, and makes sure to do
+    longest-first testing when there is a conflict, regardless of the input order,
+    but returns a C{L{MatchFirst}} for best performance.
+
+    Parameters:
+     - strs - a string of space-delimited literals, or a collection of string literals
+     - caseless - (default=C{False}) - treat all literals as caseless
+     - useRegex - (default=C{True}) - as an optimization, will generate a Regex
+          object; otherwise, will generate a C{MatchFirst} object (if C{caseless=True}, or
+          if creating a C{Regex} raises an exception)
+
+    Example::
+        comp_oper = oneOf("< = > <= >= !=")
+        var = Word(alphas)
+        number = Word(nums)
+        term = var | number
+        comparison_expr = term + comp_oper + term
+        print(comparison_expr.searchString("B = 12  AA=23 B<=AA AA>12"))
+    prints::
+        [['B', '=', '12'], ['AA', '=', '23'], ['B', '<=', 'AA'], ['AA', '>', '12']]
+    """
+    if caseless:
+        isequal = ( lambda a,b: a.upper() == b.upper() )
+        masks = ( lambda a,b: b.upper().startswith(a.upper()) )
+        parseElementClass = CaselessLiteral
+    else:
+        isequal = ( lambda a,b: a == b )
+        masks = ( lambda a,b: b.startswith(a) )
+        parseElementClass = Literal
+
+    symbols = []
+    if isinstance(strs,basestring):
+        symbols = strs.split()
+    elif isinstance(strs, Iterable):
+        symbols = list(strs)
+    else:
+        warnings.warn("Invalid argument to oneOf, expected string or iterable",
+                SyntaxWarning, stacklevel=2)
+    if not symbols:
+        return NoMatch()
+
+    i = 0
+    while i < len(symbols)-1:
+        cur = symbols[i]
+        for j,other in enumerate(symbols[i+1:]):
+            if ( isequal(other, cur) ):
+                del symbols[i+j+1]
+                break
+            elif ( masks(cur, other) ):
+                del symbols[i+j+1]
+                symbols.insert(i,other)
+                cur = other
+                break
+        else:
+            i += 1
+
+    if not caseless and useRegex:
+        #~ print (strs,"->", "|".join( [ _escapeRegexChars(sym) for sym in symbols] ))
+        try:
+            if len(symbols)==len("".join(symbols)):
+                return Regex( "[%s]" % "".join(_escapeRegexRangeChars(sym) for sym in symbols) ).setName(' | '.join(symbols))
+            else:
+                return Regex( "|".join(re.escape(sym) for sym in symbols) ).setName(' | '.join(symbols))
+        except Exception:
+            warnings.warn("Exception creating Regex for oneOf, building MatchFirst",
+                    SyntaxWarning, stacklevel=2)
+
+
+    # last resort, just use MatchFirst
+    return MatchFirst(parseElementClass(sym) for sym in symbols).setName(' | '.join(symbols))
+
+def dictOf( key, value ):
+    """
+    Helper to easily and clearly define a dictionary by specifying the respective patterns
+    for the key and value.  Takes care of defining the C{L{Dict}}, C{L{ZeroOrMore}}, and C{L{Group}} tokens
+    in the proper order.  The key pattern can include delimiting markers or punctuation,
+    as long as they are suppressed, thereby leaving the significant key text.  The value
+    pattern can include named results, so that the C{Dict} results can include named token
+    fields.
+
+    Example::
+        text = "shape: SQUARE posn: upper left color: light blue texture: burlap"
+        attr_expr = (label + Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join))
+        print(OneOrMore(attr_expr).parseString(text).dump())
+        
+        attr_label = label
+        attr_value = Suppress(':') + OneOrMore(data_word, stopOn=label).setParseAction(' '.join)
+
+        # similar to Dict, but simpler call format
+        result = dictOf(attr_label, attr_value).parseString(text)
+        print(result.dump())
+        print(result['shape'])
+        print(result.shape)  # object attribute access works too
+        print(result.asDict())
+    prints::
+        [['shape', 'SQUARE'], ['posn', 'upper left'], ['color', 'light blue'], ['texture', 'burlap']]
+        - color: light blue
+        - posn: upper left
+        - shape: SQUARE
+        - texture: burlap
+        SQUARE
+        SQUARE
+        {'color': 'light blue', 'shape': 'SQUARE', 'posn': 'upper left', 'texture': 'burlap'}
+    """
+    return Dict( ZeroOrMore( Group ( key + value ) ) )
+
+def originalTextFor(expr, asString=True):
+    """
+    Helper to return the original, untokenized text for a given expression.  Useful to
+    restore the parsed fields of an HTML start tag into the raw tag text itself, or to
+    revert separate tokens with intervening whitespace back to the original matching
+    input text. By default, returns astring containing the original parsed text.  
+       
+    If the optional C{asString} argument is passed as C{False}, then the return value is a 
+    C{L{ParseResults}} containing any results names that were originally matched, and a 
+    single token containing the original matched text from the input string.  So if 
+    the expression passed to C{L{originalTextFor}} contains expressions with defined
+    results names, you must set C{asString} to C{False} if you want to preserve those
+    results name values.
+
+    Example::
+        src = "this is test <b> bold <i>text</i> </b> normal text "
+        for tag in ("b","i"):
+            opener,closer = makeHTMLTags(tag)
+            patt = originalTextFor(opener + SkipTo(closer) + closer)
+            print(patt.searchString(src)[0])
+    prints::
+        ['<b> bold <i>text</i> </b>']
+        ['<i>text</i>']
+    """
+    locMarker = Empty().setParseAction(lambda s,loc,t: loc)
+    endlocMarker = locMarker.copy()
+    endlocMarker.callPreparse = False
+    matchExpr = locMarker("_original_start") + expr + endlocMarker("_original_end")
+    if asString:
+        extractText = lambda s,l,t: s[t._original_start:t._original_end]
+    else:
+        def extractText(s,l,t):
+            t[:] = [s[t.pop('_original_start'):t.pop('_original_end')]]
+    matchExpr.setParseAction(extractText)
+    matchExpr.ignoreExprs = expr.ignoreExprs
+    return matchExpr
+
+def ungroup(expr): 
+    """
+    Helper to undo pyparsing's default grouping of And expressions, even
+    if all but one are non-empty.
+    """
+    return TokenConverter(expr).setParseAction(lambda t:t[0])
+
+def locatedExpr(expr):
+    """
+    Helper to decorate a returned token with its starting and ending locations in the input string.
+    This helper adds the following results names:
+     - locn_start = location where matched expression begins
+     - locn_end = location where matched expression ends
+     - value = the actual parsed results
+
+    Be careful if the input text contains C{<TAB>} characters, you may want to call
+    C{L{ParserElement.parseWithTabs}}
+
+    Example::
+        wd = Word(alphas)
+        for match in locatedExpr(wd).searchString("ljsdf123lksdjjf123lkkjj1222"):
+            print(match)
+    prints::
+        [[0, 'ljsdf', 5]]
+        [[8, 'lksdjjf', 15]]
+        [[18, 'lkkjj', 23]]
+    """
+    locator = Empty().setParseAction(lambda s,l,t: l)
+    return Group(locator("locn_start") + expr("value") + locator.copy().leaveWhitespace()("locn_end"))
+
+
+# convenience constants for positional expressions
+empty       = Empty().setName("empty")
+lineStart   = LineStart().setName("lineStart")
+lineEnd     = LineEnd().setName("lineEnd")
+stringStart = StringStart().setName("stringStart")
+stringEnd   = StringEnd().setName("stringEnd")
+
+_escapedPunc = Word( _bslash, r"\[]-*.$+^?()~ ", exact=2 ).setParseAction(lambda s,l,t:t[0][1])
+_escapedHexChar = Regex(r"\\0?[xX][0-9a-fA-F]+").setParseAction(lambda s,l,t:unichr(int(t[0].lstrip(r'\0x'),16)))
+_escapedOctChar = Regex(r"\\0[0-7]+").setParseAction(lambda s,l,t:unichr(int(t[0][1:],8)))
+_singleChar = _escapedPunc | _escapedHexChar | _escapedOctChar | CharsNotIn(r'\]', exact=1)
+_charRange = Group(_singleChar + Suppress("-") + _singleChar)
+_reBracketExpr = Literal("[") + Optional("^").setResultsName("negate") + Group( OneOrMore( _charRange | _singleChar ) ).setResultsName("body") + "]"
+
+def srange(s):
+    r"""
+    Helper to easily define string ranges for use in Word construction.  Borrows
+    syntax from regexp '[]' string range definitions::
+        srange("[0-9]")   -> "0123456789"
+        srange("[a-z]")   -> "abcdefghijklmnopqrstuvwxyz"
+        srange("[a-z$_]") -> "abcdefghijklmnopqrstuvwxyz$_"
+    The input string must be enclosed in []'s, and the returned string is the expanded
+    character set joined into a single string.
+    The values enclosed in the []'s may be:
+     - a single character
+     - an escaped character with a leading backslash (such as C{\-} or C{\]})
+     - an escaped hex character with a leading C{'\x'} (C{\x21}, which is a C{'!'} character) 
+         (C{\0x##} is also supported for backwards compatibility) 
+     - an escaped octal character with a leading C{'\0'} (C{\041}, which is a C{'!'} character)
+     - a range of any of the above, separated by a dash (C{'a-z'}, etc.)
+     - any combination of the above (C{'aeiouy'}, C{'a-zA-Z0-9_$'}, etc.)
+    """
+    _expanded = lambda p: p if not isinstance(p,ParseResults) else ''.join(unichr(c) for c in range(ord(p[0]),ord(p[1])+1))
+    try:
+        return "".join(_expanded(part) for part in _reBracketExpr.parseString(s).body)
+    except Exception:
+        return ""
+
+def matchOnlyAtCol(n):
+    """
+    Helper method for defining parse actions that require matching at a specific
+    column in the input text.
+    """
+    def verifyCol(strg,locn,toks):
+        if col(locn,strg) != n:
+            raise ParseException(strg,locn,"matched token not at column %d" % n)
+    return verifyCol
+
+def replaceWith(replStr):
+    """
+    Helper method for common parse actions that simply return a literal value.  Especially
+    useful when used with C{L{transformString<ParserElement.transformString>}()}.
+
+    Example::
+        num = Word(nums).setParseAction(lambda toks: int(toks[0]))
+        na = oneOf("N/A NA").setParseAction(replaceWith(math.nan))
+        term = na | num
+        
+        OneOrMore(term).parseString("324 234 N/A 234") # -> [324, 234, nan, 234]
+    """
+    return lambda s,l,t: [replStr]
+
+def removeQuotes(s,l,t):
+    """
+    Helper parse action for removing quotation marks from parsed quoted strings.
+
+    Example::
+        # by default, quotation marks are included in parsed results
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["'Now is the Winter of our Discontent'"]
+
+        # use removeQuotes to strip quotation marks from parsed results
+        quotedString.setParseAction(removeQuotes)
+        quotedString.parseString("'Now is the Winter of our Discontent'") # -> ["Now is the Winter of our Discontent"]
+    """
+    return t[0][1:-1]
+
+def tokenMap(func, *args):
+    """
+    Helper to define a parse action by mapping a function to all elements of a ParseResults list.If any additional 
+    args are passed, they are forwarded to the given function as additional arguments after
+    the token, as in C{hex_integer = Word(hexnums).setParseAction(tokenMap(int, 16))}, which will convert the
+    parsed data to an integer using base 16.
+
+    Example (compare the last to example in L{ParserElement.transformString}::
+        hex_ints = OneOrMore(Word(hexnums)).setParseAction(tokenMap(int, 16))
+        hex_ints.runTests('''
+            00 11 22 aa FF 0a 0d 1a
+            ''')
+        
+        upperword = Word(alphas).setParseAction(tokenMap(str.upper))
+        OneOrMore(upperword).runTests('''
+            my kingdom for a horse
+            ''')
+
+        wd = Word(alphas).setParseAction(tokenMap(str.title))
+        OneOrMore(wd).setParseAction(' '.join).runTests('''
+            now is the winter of our discontent made glorious summer by this sun of york
+            ''')
+    prints::
+        00 11 22 aa FF 0a 0d 1a
+        [0, 17, 34, 170, 255, 10, 13, 26]
+
+        my kingdom for a horse
+        ['MY', 'KINGDOM', 'FOR', 'A', 'HORSE']
+
+        now is the winter of our discontent made glorious summer by this sun of york
+        ['Now Is The Winter Of Our Discontent Made Glorious Summer By This Sun Of York']
+    """
+    def pa(s,l,t):
+        return [func(tokn, *args) for tokn in t]
+
+    try:
+        func_name = getattr(func, '__name__', 
+                            getattr(func, '__class__').__name__)
+    except Exception:
+        func_name = str(func)
+    pa.__name__ = func_name
+
+    return pa
+
+upcaseTokens = tokenMap(lambda t: _ustr(t).upper())
+"""(Deprecated) Helper parse action to convert tokens to upper case. Deprecated in favor of L{pyparsing_common.upcaseTokens}"""
+
+downcaseTokens = tokenMap(lambda t: _ustr(t).lower())
+"""(Deprecated) Helper parse action to convert tokens to lower case. Deprecated in favor of L{pyparsing_common.downcaseTokens}"""
+    
+def _makeTags(tagStr, xml):
+    """Internal helper to construct opening and closing tag expressions, given a tag name"""
+    if isinstance(tagStr,basestring):
+        resname = tagStr
+        tagStr = Keyword(tagStr, caseless=not xml)
+    else:
+        resname = tagStr.name
+
+    tagAttrName = Word(alphas,alphanums+"_-:")
+    if (xml):
+        tagAttrValue = dblQuotedString.copy().setParseAction( removeQuotes )
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName + Suppress("=") + tagAttrValue ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    else:
+        printablesLessRAbrack = "".join(c for c in printables if c not in ">")
+        tagAttrValue = quotedString.copy().setParseAction( removeQuotes ) | Word(printablesLessRAbrack)
+        openTag = Suppress("<") + tagStr("tag") + \
+                Dict(ZeroOrMore(Group( tagAttrName.setParseAction(downcaseTokens) + \
+                Optional( Suppress("=") + tagAttrValue ) ))) + \
+                Optional("/",default=[False]).setResultsName("empty").setParseAction(lambda s,l,t:t[0]=='/') + Suppress(">")
+    closeTag = Combine(_L("</") + tagStr + ">")
+
+    openTag = openTag.setResultsName("start"+"".join(resname.replace(":"," ").title().split())).setName("<%s>" % resname)
+    closeTag = closeTag.setResultsName("end"+"".join(resname.replace(":"," ").title().split())).setName("</%s>" % resname)
+    openTag.tag = resname
+    closeTag.tag = resname
+    return openTag, closeTag
+
+def makeHTMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for HTML, given a tag name. Matches
+    tags in either upper or lower case, attributes with namespaces and with quoted or unquoted values.
+
+    Example::
+        text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+        # makeHTMLTags returns pyparsing expressions for the opening and closing tags as a 2-tuple
+        a,a_end = makeHTMLTags("A")
+        link_expr = a + SkipTo(a_end)("link_text") + a_end
+        
+        for link in link_expr.searchString(text):
+            # attributes in the <A> tag (like "href" shown here) are also accessible as named results
+            print(link.link_text, '->', link.href)
+    prints::
+        pyparsing -> http://pyparsing.wikispaces.com
+    """
+    return _makeTags( tagStr, False )
+
+def makeXMLTags(tagStr):
+    """
+    Helper to construct opening and closing tag expressions for XML, given a tag name. Matches
+    tags only in the given upper/lower case.
+
+    Example: similar to L{makeHTMLTags}
+    """
+    return _makeTags( tagStr, True )
+
+def withAttribute(*args,**attrDict):
+    """
+    Helper to create a validating parse action to be used with start tags created
+    with C{L{makeXMLTags}} or C{L{makeHTMLTags}}. Use C{withAttribute} to qualify a starting tag
+    with a required attribute value, to avoid false matches on common tags such as
+    C{<TD>} or C{<DIV>}.
+
+    Call C{withAttribute} with a series of attribute names and values. Specify the list
+    of filter attributes names and values as:
+     - keyword arguments, as in C{(align="right")}, or
+     - as an explicit dict with C{**} operator, when an attribute name is also a Python
+          reserved word, as in C{**{"class":"Customer", "align":"right"}}
+     - a list of name-value tuples, as in ( ("ns1:class", "Customer"), ("ns2:align","right") )
+    For attribute names with a namespace prefix, you must use the second form.  Attribute
+    names are matched insensitive to upper/lower case.
+       
+    If just testing for C{class} (with or without a namespace), use C{L{withClass}}.
+
+    To verify that the attribute exists, but without specifying a value, pass
+    C{withAttribute.ANY_VALUE} as the value.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div type="grid">1 4 0 1 0</div>
+            <div type="graph">1,3 2,3 1,1</div>
+            <div>this has no type</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+
+        # only match div tag having a type attribute with value "grid"
+        div_grid = div().setParseAction(withAttribute(type="grid"))
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        # construct a match with any div tag having a type attribute, regardless of the value
+        div_any_type = div().setParseAction(withAttribute(type=withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    if args:
+        attrs = args[:]
+    else:
+        attrs = attrDict.items()
+    attrs = [(k,v) for k,v in attrs]
+    def pa(s,l,tokens):
+        for attrName,attrValue in attrs:
+            if attrName not in tokens:
+                raise ParseException(s,l,"no matching attribute " + attrName)
+            if attrValue != withAttribute.ANY_VALUE and tokens[attrName] != attrValue:
+                raise ParseException(s,l,"attribute '%s' has value '%s', must be '%s'" %
+                                            (attrName, tokens[attrName], attrValue))
+    return pa
+withAttribute.ANY_VALUE = object()
+
+def withClass(classname, namespace=''):
+    """
+    Simplified version of C{L{withAttribute}} when matching on a div class - made
+    difficult because C{class} is a reserved word in Python.
+
+    Example::
+        html = '''
+            <div>
+            Some text
+            <div class="grid">1 4 0 1 0</div>
+            <div class="graph">1,3 2,3 1,1</div>
+            <div>this &lt;div&gt; has no class</div>
+            </div>
+                
+        '''
+        div,div_end = makeHTMLTags("div")
+        div_grid = div().setParseAction(withClass("grid"))
+        
+        grid_expr = div_grid + SkipTo(div | div_end)("body")
+        for grid_header in grid_expr.searchString(html):
+            print(grid_header.body)
+        
+        div_any_type = div().setParseAction(withClass(withAttribute.ANY_VALUE))
+        div_expr = div_any_type + SkipTo(div | div_end)("body")
+        for div_header in div_expr.searchString(html):
+            print(div_header.body)
+    prints::
+        1 4 0 1 0
+
+        1 4 0 1 0
+        1,3 2,3 1,1
+    """
+    classattr = "%s:class" % namespace if namespace else "class"
+    return withAttribute(**{classattr : classname})        
+
+opAssoc = _Constants()
+opAssoc.LEFT = object()
+opAssoc.RIGHT = object()
+
+def infixNotation( baseExpr, opList, lpar=Suppress('('), rpar=Suppress(')') ):
+    """
+    Helper method for constructing grammars of expressions made up of
+    operators working in a precedence hierarchy.  Operators may be unary or
+    binary, left- or right-associative.  Parse actions can also be attached
+    to operator expressions. The generated parser will also recognize the use 
+    of parentheses to override operator precedences (see example below).
+    
+    Note: if you define a deep operator list, you may see performance issues
+    when using infixNotation. See L{ParserElement.enablePackrat} for a
+    mechanism to potentially improve your parser performance.
+
+    Parameters:
+     - baseExpr - expression representing the most basic element for the nested
+     - opList - list of tuples, one for each operator precedence level in the
+      expression grammar; each tuple is of the form
+      (opExpr, numTerms, rightLeftAssoc, parseAction), where:
+       - opExpr is the pyparsing expression for the operator;
+          may also be a string, which will be converted to a Literal;
+          if numTerms is 3, opExpr is a tuple of two expressions, for the
+          two operators separating the 3 terms
+       - numTerms is the number of terms for this operator (must
+          be 1, 2, or 3)
+       - rightLeftAssoc is the indicator whether the operator is
+          right or left associative, using the pyparsing-defined
+          constants C{opAssoc.RIGHT} and C{opAssoc.LEFT}.
+       - parseAction is the parse action to be associated with
+          expressions matching this operator expression (the
+          parse action tuple member may be omitted); if the parse action
+          is passed a tuple or list of functions, this is equivalent to
+          calling C{setParseAction(*fn)} (L{ParserElement.setParseAction})
+     - lpar - expression for matching left-parentheses (default=C{Suppress('(')})
+     - rpar - expression for matching right-parentheses (default=C{Suppress(')')})
+
+    Example::
+        # simple example of four-function arithmetic with ints and variable names
+        integer = pyparsing_common.signed_integer
+        varname = pyparsing_common.identifier 
+        
+        arith_expr = infixNotation(integer | varname,
+            [
+            ('-', 1, opAssoc.RIGHT),
+            (oneOf('* /'), 2, opAssoc.LEFT),
+            (oneOf('+ -'), 2, opAssoc.LEFT),
+            ])
+        
+        arith_expr.runTests('''
+            5+3*6
+            (5+3)*6
+            -2--11
+            ''', fullDump=False)
+    prints::
+        5+3*6
+        [[5, '+', [3, '*', 6]]]
+
+        (5+3)*6
+        [[[5, '+', 3], '*', 6]]
+
+        -2--11
+        [[['-', 2], '-', ['-', 11]]]
+    """
+    ret = Forward()
+    lastExpr = baseExpr | ( lpar + ret + rpar )
+    for i,operDef in enumerate(opList):
+        opExpr,arity,rightLeftAssoc,pa = (operDef + (None,))[:4]
+        termName = "%s term" % opExpr if arity < 3 else "%s%s term" % opExpr
+        if arity == 3:
+            if opExpr is None or len(opExpr) != 2:
+                raise ValueError("if numterms=3, opExpr must be a tuple or list of two expressions")
+            opExpr1, opExpr2 = opExpr
+        thisExpr = Forward().setName(termName)
+        if rightLeftAssoc == opAssoc.LEFT:
+            if arity == 1:
+                matchExpr = FollowedBy(lastExpr + opExpr) + Group( lastExpr + OneOrMore( opExpr ) )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + lastExpr) + Group( lastExpr + OneOrMore( opExpr + lastExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr+lastExpr) + Group( lastExpr + OneOrMore(lastExpr) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr) + \
+                            Group( lastExpr + opExpr1 + lastExpr + opExpr2 + lastExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        elif rightLeftAssoc == opAssoc.RIGHT:
+            if arity == 1:
+                # try to avoid LR with this extra test
+                if not isinstance(opExpr, Optional):
+                    opExpr = Optional(opExpr)
+                matchExpr = FollowedBy(opExpr.expr + thisExpr) + Group( opExpr + thisExpr )
+            elif arity == 2:
+                if opExpr is not None:
+                    matchExpr = FollowedBy(lastExpr + opExpr + thisExpr) + Group( lastExpr + OneOrMore( opExpr + thisExpr ) )
+                else:
+                    matchExpr = FollowedBy(lastExpr + thisExpr) + Group( lastExpr + OneOrMore( thisExpr ) )
+            elif arity == 3:
+                matchExpr = FollowedBy(lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr) + \
+                            Group( lastExpr + opExpr1 + thisExpr + opExpr2 + thisExpr )
+            else:
+                raise ValueError("operator must be unary (1), binary (2), or ternary (3)")
+        else:
+            raise ValueError("operator must indicate right or left associativity")
+        if pa:
+            if isinstance(pa, (tuple, list)):
+                matchExpr.setParseAction(*pa)
+            else:
+                matchExpr.setParseAction(pa)
+        thisExpr <<= ( matchExpr.setName(termName) | lastExpr )
+        lastExpr = thisExpr
+    ret <<= lastExpr
+    return ret
+
+operatorPrecedence = infixNotation
+"""(Deprecated) Former name of C{L{infixNotation}}, will be dropped in a future release."""
+
+dblQuotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"').setName("string enclosed in double quotes")
+sglQuotedString = Combine(Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("string enclosed in single quotes")
+quotedString = Combine(Regex(r'"(?:[^"\n\r\\]|(?:"")|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*')+'"'|
+                       Regex(r"'(?:[^'\n\r\\]|(?:'')|(?:\\(?:[^x]|x[0-9a-fA-F]+)))*")+"'").setName("quotedString using single or double quotes")
+unicodeString = Combine(_L('u') + quotedString.copy()).setName("unicode string literal")
+
+def nestedExpr(opener="(", closer=")", content=None, ignoreExpr=quotedString.copy()):
+    """
+    Helper method for defining nested lists enclosed in opening and closing
+    delimiters ("(" and ")" are the default).
+
+    Parameters:
+     - opener - opening character for a nested list (default=C{"("}); can also be a pyparsing expression
+     - closer - closing character for a nested list (default=C{")"}); can also be a pyparsing expression
+     - content - expression for items within the nested lists (default=C{None})
+     - ignoreExpr - expression for ignoring opening and closing delimiters (default=C{quotedString})
+
+    If an expression is not provided for the content argument, the nested
+    expression will capture all whitespace-delimited content between delimiters
+    as a list of separate values.
+
+    Use the C{ignoreExpr} argument to define expressions that may contain
+    opening or closing characters that should not be treated as opening
+    or closing characters for nesting, such as quotedString or a comment
+    expression.  Specify multiple expressions using an C{L{Or}} or C{L{MatchFirst}}.
+    The default is L{quotedString}, but if no expressions are to be ignored,
+    then pass C{None} for this argument.
+
+    Example::
+        data_type = oneOf("void int short long char float double")
+        decl_data_type = Combine(data_type + Optional(Word('*')))
+        ident = Word(alphas+'_', alphanums+'_')
+        number = pyparsing_common.number
+        arg = Group(decl_data_type + ident)
+        LPAR,RPAR = map(Suppress, "()")
+
+        code_body = nestedExpr('{', '}', ignoreExpr=(quotedString | cStyleComment))
+
+        c_function = (decl_data_type("type") 
+                      + ident("name")
+                      + LPAR + Optional(delimitedList(arg), [])("args") + RPAR 
+                      + code_body("body"))
+        c_function.ignore(cStyleComment)
+        
+        source_code = '''
+            int is_odd(int x) { 
+                return (x%2); 
+            }
+                
+            int dec_to_hex(char hchar) { 
+                if (hchar >= '0' && hchar <= '9') { 
+                    return (ord(hchar)-ord('0')); 
+                } else { 
+                    return (10+ord(hchar)-ord('A'));
+                } 
+            }
+        '''
+        for func in c_function.searchString(source_code):
+            print("%(name)s (%(type)s) args: %(args)s" % func)
+
+    prints::
+        is_odd (int) args: [['int', 'x']]
+        dec_to_hex (int) args: [['char', 'hchar']]
+    """
+    if opener == closer:
+        raise ValueError("opening and closing strings cannot be the same")
+    if content is None:
+        if isinstance(opener,basestring) and isinstance(closer,basestring):
+            if len(opener) == 1 and len(closer)==1:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr +
+                                    CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (empty.copy()+CharsNotIn(opener+closer+ParserElement.DEFAULT_WHITE_CHARS
+                                ).setParseAction(lambda t:t[0].strip()))
+            else:
+                if ignoreExpr is not None:
+                    content = (Combine(OneOrMore(~ignoreExpr + 
+                                    ~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+                else:
+                    content = (Combine(OneOrMore(~Literal(opener) + ~Literal(closer) +
+                                    CharsNotIn(ParserElement.DEFAULT_WHITE_CHARS,exact=1))
+                                ).setParseAction(lambda t:t[0].strip()))
+        else:
+            raise ValueError("opening and closing arguments must be strings if no content expression is given")
+    ret = Forward()
+    if ignoreExpr is not None:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ignoreExpr | ret | content ) + Suppress(closer) )
+    else:
+        ret <<= Group( Suppress(opener) + ZeroOrMore( ret | content )  + Suppress(closer) )
+    ret.setName('nested %s%s expression' % (opener,closer))
+    return ret
+
+def indentedBlock(blockStatementExpr, indentStack, indent=True):
+    """
+    Helper method for defining space-delimited indentation blocks, such as
+    those used to define block statements in Python source code.
+
+    Parameters:
+     - blockStatementExpr - expression defining syntax of statement that
+            is repeated within the indented block
+     - indentStack - list created by caller to manage indentation stack
+            (multiple statementWithIndentedBlock expressions within a single grammar
+            should share a common indentStack)
+     - indent - boolean indicating whether block must be indented beyond the
+            the current level; set to False for block of left-most statements
+            (default=C{True})
+
+    A valid block must contain at least one C{blockStatement}.
+
+    Example::
+        data = '''
+        def A(z):
+          A1
+          B = 100
+          G = A2
+          A2
+          A3
+        B
+        def BB(a,b,c):
+          BB1
+          def BBA():
+            bba1
+            bba2
+            bba3
+        C
+        D
+        def spam(x,y):
+             def eggs(z):
+                 pass
+        '''
+
+
+        indentStack = [1]
+        stmt = Forward()
+
+        identifier = Word(alphas, alphanums)
+        funcDecl = ("def" + identifier + Group( "(" + Optional( delimitedList(identifier) ) + ")" ) + ":")
+        func_body = indentedBlock(stmt, indentStack)
+        funcDef = Group( funcDecl + func_body )
+
+        rvalue = Forward()
+        funcCall = Group(identifier + "(" + Optional(delimitedList(rvalue)) + ")")
+        rvalue << (funcCall | identifier | Word(nums))
+        assignment = Group(identifier + "=" + rvalue)
+        stmt << ( funcDef | assignment | identifier )
+
+        module_body = OneOrMore(stmt)
+
+        parseTree = module_body.parseString(data)
+        parseTree.pprint()
+    prints::
+        [['def',
+          'A',
+          ['(', 'z', ')'],
+          ':',
+          [['A1'], [['B', '=', '100']], [['G', '=', 'A2']], ['A2'], ['A3']]],
+         'B',
+         ['def',
+          'BB',
+          ['(', 'a', 'b', 'c', ')'],
+          ':',
+          [['BB1'], [['def', 'BBA', ['(', ')'], ':', [['bba1'], ['bba2'], ['bba3']]]]]],
+         'C',
+         'D',
+         ['def',
+          'spam',
+          ['(', 'x', 'y', ')'],
+          ':',
+          [[['def', 'eggs', ['(', 'z', ')'], ':', [['pass']]]]]]] 
+    """
+    def checkPeerIndent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if curCol != indentStack[-1]:
+            if curCol > indentStack[-1]:
+                raise ParseFatalException(s,l,"illegal nesting")
+            raise ParseException(s,l,"not a peer entry")
+
+    def checkSubIndent(s,l,t):
+        curCol = col(l,s)
+        if curCol > indentStack[-1]:
+            indentStack.append( curCol )
+        else:
+            raise ParseException(s,l,"not a subentry")
+
+    def checkUnindent(s,l,t):
+        if l >= len(s): return
+        curCol = col(l,s)
+        if not(indentStack and curCol < indentStack[-1] and curCol <= indentStack[-2]):
+            raise ParseException(s,l,"not an unindent")
+        indentStack.pop()
+
+    NL = OneOrMore(LineEnd().setWhitespaceChars("\t ").suppress())
+    INDENT = (Empty() + Empty().setParseAction(checkSubIndent)).setName('INDENT')
+    PEER   = Empty().setParseAction(checkPeerIndent).setName('')
+    UNDENT = Empty().setParseAction(checkUnindent).setName('UNINDENT')
+    if indent:
+        smExpr = Group( Optional(NL) +
+            #~ FollowedBy(blockStatementExpr) +
+            INDENT + (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) + UNDENT)
+    else:
+        smExpr = Group( Optional(NL) +
+            (OneOrMore( PEER + Group(blockStatementExpr) + Optional(NL) )) )
+    blockStatementExpr.ignore(_bslash + LineEnd())
+    return smExpr.setName('indented block')
+
+alphas8bit = srange(r"[\0xc0-\0xd6\0xd8-\0xf6\0xf8-\0xff]")
+punc8bit = srange(r"[\0xa1-\0xbf\0xd7\0xf7]")
+
+anyOpenTag,anyCloseTag = makeHTMLTags(Word(alphas,alphanums+"_:").setName('any tag'))
+_htmlEntityMap = dict(zip("gt lt amp nbsp quot apos".split(),'><& "\''))
+commonHTMLEntity = Regex('&(?P<entity>' + '|'.join(_htmlEntityMap.keys()) +");").setName("common HTML entity")
+def replaceHTMLEntity(t):
+    """Helper parser action to replace common HTML entities with their special characters"""
+    return _htmlEntityMap.get(t.entity)
+
+# it's easy to get these comment structures wrong - they're very common, so may as well make them available
+cStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/').setName("C style comment")
+"Comment of the form C{/* ... */}"
+
+htmlComment = Regex(r"<!--[\s\S]*?-->").setName("HTML comment")
+"Comment of the form C{<!-- ... -->}"
+
+restOfLine = Regex(r".*").leaveWhitespace().setName("rest of line")
+dblSlashComment = Regex(r"//(?:\\\n|[^\n])*").setName("// comment")
+"Comment of the form C{// ... (to end of line)}"
+
+cppStyleComment = Combine(Regex(r"/\*(?:[^*]|\*(?!/))*") + '*/'| dblSlashComment).setName("C++ style comment")
+"Comment of either form C{L{cStyleComment}} or C{L{dblSlashComment}}"
+
+javaStyleComment = cppStyleComment
+"Same as C{L{cppStyleComment}}"
+
+pythonStyleComment = Regex(r"#.*").setName("Python style comment")
+"Comment of the form C{# ... (to end of line)}"
+
+_commasepitem = Combine(OneOrMore(Word(printables, excludeChars=',') +
+                                  Optional( Word(" \t") +
+                                            ~Literal(",") + ~LineEnd() ) ) ).streamline().setName("commaItem")
+commaSeparatedList = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("commaSeparatedList")
+"""(Deprecated) Predefined expression of 1 or more printable words or quoted strings, separated by commas.
+   This expression is deprecated in favor of L{pyparsing_common.comma_separated_list}."""
+
+# some other useful expressions - using lower-case class name since we are really using this as a namespace
+class pyparsing_common:
+    """
+    Here are some common low-level expressions that may be useful in jump-starting parser development:
+     - numeric forms (L{integers<integer>}, L{reals<real>}, L{scientific notation<sci_real>})
+     - common L{programming identifiers<identifier>}
+     - network addresses (L{MAC<mac_address>}, L{IPv4<ipv4_address>}, L{IPv6<ipv6_address>})
+     - ISO8601 L{dates<iso8601_date>} and L{datetime<iso8601_datetime>}
+     - L{UUID<uuid>}
+     - L{comma-separated list<comma_separated_list>}
+    Parse actions:
+     - C{L{convertToInteger}}
+     - C{L{convertToFloat}}
+     - C{L{convertToDate}}
+     - C{L{convertToDatetime}}
+     - C{L{stripHTMLTags}}
+     - C{L{upcaseTokens}}
+     - C{L{downcaseTokens}}
+
+    Example::
+        pyparsing_common.number.runTests('''
+            # any int or real number, returned as the appropriate type
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.fnumber.runTests('''
+            # any int or real number, returned as float
+            100
+            -100
+            +100
+            3.14159
+            6.02e23
+            1e-12
+            ''')
+
+        pyparsing_common.hex_integer.runTests('''
+            # hex numbers
+            100
+            FF
+            ''')
+
+        pyparsing_common.fraction.runTests('''
+            # fractions
+            1/2
+            -3/4
+            ''')
+
+        pyparsing_common.mixed_integer.runTests('''
+            # mixed fractions
+            1
+            1/2
+            -3/4
+            1-3/4
+            ''')
+
+        import uuid
+        pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+        pyparsing_common.uuid.runTests('''
+            # uuid
+            12345678-1234-5678-1234-567812345678
+            ''')
+    prints::
+        # any int or real number, returned as the appropriate type
+        100
+        [100]
+
+        -100
+        [-100]
+
+        +100
+        [100]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # any int or real number, returned as float
+        100
+        [100.0]
+
+        -100
+        [-100.0]
+
+        +100
+        [100.0]
+
+        3.14159
+        [3.14159]
+
+        6.02e23
+        [6.02e+23]
+
+        1e-12
+        [1e-12]
+
+        # hex numbers
+        100
+        [256]
+
+        FF
+        [255]
+
+        # fractions
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        # mixed fractions
+        1
+        [1]
+
+        1/2
+        [0.5]
+
+        -3/4
+        [-0.75]
+
+        1-3/4
+        [1.75]
+
+        # uuid
+        12345678-1234-5678-1234-567812345678
+        [UUID('12345678-1234-5678-1234-567812345678')]
+    """
+
+    convertToInteger = tokenMap(int)
+    """
+    Parse action for converting parsed integers to Python int
+    """
+
+    convertToFloat = tokenMap(float)
+    """
+    Parse action for converting parsed numbers to Python float
+    """
+
+    integer = Word(nums).setName("integer").setParseAction(convertToInteger)
+    """expression that parses an unsigned integer, returns an int"""
+
+    hex_integer = Word(hexnums).setName("hex integer").setParseAction(tokenMap(int,16))
+    """expression that parses a hexadecimal integer, returns an int"""
+
+    signed_integer = Regex(r'[+-]?\d+').setName("signed integer").setParseAction(convertToInteger)
+    """expression that parses an integer with optional leading sign, returns an int"""
+
+    fraction = (signed_integer().setParseAction(convertToFloat) + '/' + signed_integer().setParseAction(convertToFloat)).setName("fraction")
+    """fractional expression of an integer divided by an integer, returns a float"""
+    fraction.addParseAction(lambda t: t[0]/t[-1])
+
+    mixed_integer = (fraction | signed_integer + Optional(Optional('-').suppress() + fraction)).setName("fraction or mixed integer-fraction")
+    """mixed integer of the form 'integer - fraction', with optional leading integer, returns float"""
+    mixed_integer.addParseAction(sum)
+
+    real = Regex(r'[+-]?\d+\.\d*').setName("real number").setParseAction(convertToFloat)
+    """expression that parses a floating point number and returns a float"""
+
+    sci_real = Regex(r'[+-]?\d+([eE][+-]?\d+|\.\d*([eE][+-]?\d+)?)').setName("real number with scientific notation").setParseAction(convertToFloat)
+    """expression that parses a floating point number with optional scientific notation and returns a float"""
+
+    # streamlining this expression makes the docs nicer-looking
+    number = (sci_real | real | signed_integer).streamline()
+    """any numeric expression, returns the corresponding Python type"""
+
+    fnumber = Regex(r'[+-]?\d+\.?\d*([eE][+-]?\d+)?').setName("fnumber").setParseAction(convertToFloat)
+    """any int or real number, returned as float"""
+    
+    identifier = Word(alphas+'_', alphanums+'_').setName("identifier")
+    """typical code identifier (leading alpha or '_', followed by 0 or more alphas, nums, or '_')"""
+    
+    ipv4_address = Regex(r'(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})(\.(25[0-5]|2[0-4][0-9]|1?[0-9]{1,2})){3}').setName("IPv4 address")
+    "IPv4 address (C{0.0.0.0 - 255.255.255.255})"
+
+    _ipv6_part = Regex(r'[0-9a-fA-F]{1,4}').setName("hex_integer")
+    _full_ipv6_address = (_ipv6_part + (':' + _ipv6_part)*7).setName("full IPv6 address")
+    _short_ipv6_address = (Optional(_ipv6_part + (':' + _ipv6_part)*(0,6)) + "::" + Optional(_ipv6_part + (':' + _ipv6_part)*(0,6))).setName("short IPv6 address")
+    _short_ipv6_address.addCondition(lambda t: sum(1 for tt in t if pyparsing_common._ipv6_part.matches(tt)) < 8)
+    _mixed_ipv6_address = ("::ffff:" + ipv4_address).setName("mixed IPv6 address")
+    ipv6_address = Combine((_full_ipv6_address | _mixed_ipv6_address | _short_ipv6_address).setName("IPv6 address")).setName("IPv6 address")
+    "IPv6 address (long, short, or mixed form)"
+    
+    mac_address = Regex(r'[0-9a-fA-F]{2}([:.-])[0-9a-fA-F]{2}(?:\1[0-9a-fA-F]{2}){4}').setName("MAC address")
+    "MAC address xx:xx:xx:xx:xx (may also have '-' or '.' delimiters)"
+
+    @staticmethod
+    def convertToDate(fmt="%Y-%m-%d"):
+        """
+        Helper to create a parse action for converting parsed date string to Python datetime.date
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%d"})
+
+        Example::
+            date_expr = pyparsing_common.iso8601_date.copy()
+            date_expr.setParseAction(pyparsing_common.convertToDate())
+            print(date_expr.parseString("1999-12-31"))
+        prints::
+            [datetime.date(1999, 12, 31)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt).date()
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    @staticmethod
+    def convertToDatetime(fmt="%Y-%m-%dT%H:%M:%S.%f"):
+        """
+        Helper to create a parse action for converting parsed datetime string to Python datetime.datetime
+
+        Params -
+         - fmt - format to be passed to datetime.strptime (default=C{"%Y-%m-%dT%H:%M:%S.%f"})
+
+        Example::
+            dt_expr = pyparsing_common.iso8601_datetime.copy()
+            dt_expr.setParseAction(pyparsing_common.convertToDatetime())
+            print(dt_expr.parseString("1999-12-31T23:59:59.999"))
+        prints::
+            [datetime.datetime(1999, 12, 31, 23, 59, 59, 999000)]
+        """
+        def cvt_fn(s,l,t):
+            try:
+                return datetime.strptime(t[0], fmt)
+            except ValueError as ve:
+                raise ParseException(s, l, str(ve))
+        return cvt_fn
+
+    iso8601_date = Regex(r'(?P<year>\d{4})(?:-(?P<month>\d\d)(?:-(?P<day>\d\d))?)?').setName("ISO8601 date")
+    "ISO8601 date (C{yyyy-mm-dd})"
+
+    iso8601_datetime = Regex(r'(?P<year>\d{4})-(?P<month>\d\d)-(?P<day>\d\d)[T ](?P<hour>\d\d):(?P<minute>\d\d)(:(?P<second>\d\d(\.\d*)?)?)?(?P<tz>Z|[+-]\d\d:?\d\d)?').setName("ISO8601 datetime")
+    "ISO8601 datetime (C{yyyy-mm-ddThh:mm:ss.s(Z|+-00:00)}) - trailing seconds, milliseconds, and timezone optional; accepts separating C{'T'} or C{' '}"
+
+    uuid = Regex(r'[0-9a-fA-F]{8}(-[0-9a-fA-F]{4}){3}-[0-9a-fA-F]{12}').setName("UUID")
+    "UUID (C{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx})"
+
+    _html_stripper = anyOpenTag.suppress() | anyCloseTag.suppress()
+    @staticmethod
+    def stripHTMLTags(s, l, tokens):
+        """
+        Parse action to remove HTML tags from web page HTML source
+
+        Example::
+            # strip HTML links from normal text 
+            text = '<td>More info at the <a href="http://pyparsing.wikispaces.com">pyparsing</a> wiki page</td>'
+            td,td_end = makeHTMLTags("TD")
+            table_text = td + SkipTo(td_end).setParseAction(pyparsing_common.stripHTMLTags)("body") + td_end
+            
+            print(table_text.parseString(text).body) # -> 'More info at the pyparsing wiki page'
+        """
+        return pyparsing_common._html_stripper.transformString(tokens[0])
+
+    _commasepitem = Combine(OneOrMore(~Literal(",") + ~LineEnd() + Word(printables, excludeChars=',') 
+                                        + Optional( White(" \t") ) ) ).streamline().setName("commaItem")
+    comma_separated_list = delimitedList( Optional( quotedString.copy() | _commasepitem, default="") ).setName("comma separated list")
+    """Predefined expression of 1 or more printable words or quoted strings, separated by commas."""
+
+    upcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).upper()))
+    """Parse action to convert tokens to upper case."""
+
+    downcaseTokens = staticmethod(tokenMap(lambda t: _ustr(t).lower()))
+    """Parse action to convert tokens to lower case."""
+
+
+if __name__ == "__main__":
+
+    selectToken    = CaselessLiteral("select")
+    fromToken      = CaselessLiteral("from")
+
+    ident          = Word(alphas, alphanums + "_$")
+
+    columnName     = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    columnNameList = Group(delimitedList(columnName)).setName("columns")
+    columnSpec     = ('*' | columnNameList)
+
+    tableName      = delimitedList(ident, ".", combine=True).setParseAction(upcaseTokens)
+    tableNameList  = Group(delimitedList(tableName)).setName("tables")
+    
+    simpleSQL      = selectToken("command") + columnSpec("columns") + fromToken + tableNameList("tables")
+
+    # demo runTests method, including embedded comments in test string
+    simpleSQL.runTests("""
+        # '*' as column list and dotted table name
+        select * from SYS.XYZZY
+
+        # caseless match on "SELECT", and casts back to "select"
+        SELECT * from XYZZY, ABC
+
+        # list of column names, and mixed case SELECT keyword
+        Select AA,BB,CC from Sys.dual
+
+        # multiple tables
+        Select A, B, C from Sys.dual, Table2
+
+        # invalid SELECT keyword - should fail
+        Xelect A, B, C from Sys.dual
+
+        # incomplete command - should fail
+        Select
+
+        # invalid column name - should fail
+        Select ^^^ frox Sys.dual
+
+        """)
+
+    pyparsing_common.number.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    # any int or real number, returned as float
+    pyparsing_common.fnumber.runTests("""
+        100
+        -100
+        +100
+        3.14159
+        6.02e23
+        1e-12
+        """)
+
+    pyparsing_common.hex_integer.runTests("""
+        100
+        FF
+        """)
+
+    import uuid
+    pyparsing_common.uuid.setParseAction(tokenMap(uuid.UUID))
+    pyparsing_common.uuid.runTests("""
+        12345678-1234-5678-1234-567812345678
+        """)
diff --git a/venv/lib/python3.9/site-packages/setuptools/_vendor/six.py b/venv/lib/python3.9/site-packages/setuptools/_vendor/six.py
new file mode 100644
index 0000000..190c023
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/_vendor/six.py
@@ -0,0 +1,868 @@
+"""Utilities for writing code that runs on Python 2 and 3"""
+
+# Copyright (c) 2010-2015 Benjamin Peterson
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+from __future__ import absolute_import
+
+import functools
+import itertools
+import operator
+import sys
+import types
+
+__author__ = "Benjamin Peterson <benjamin@python.org>"
+__version__ = "1.10.0"
+
+
+# Useful for very coarse version differentiation.
+PY2 = sys.version_info[0] == 2
+PY3 = sys.version_info[0] == 3
+PY34 = sys.version_info[0:2] >= (3, 4)
+
+if PY3:
+    string_types = str,
+    integer_types = int,
+    class_types = type,
+    text_type = str
+    binary_type = bytes
+
+    MAXSIZE = sys.maxsize
+else:
+    string_types = basestring,
+    integer_types = (int, long)
+    class_types = (type, types.ClassType)
+    text_type = unicode
+    binary_type = str
+
+    if sys.platform.startswith("java"):
+        # Jython always uses 32 bits.
+        MAXSIZE = int((1 << 31) - 1)
+    else:
+        # It's possible to have sizeof(long) != sizeof(Py_ssize_t).
+        class X(object):
+
+            def __len__(self):
+                return 1 << 31
+        try:
+            len(X())
+        except OverflowError:
+            # 32-bit
+            MAXSIZE = int((1 << 31) - 1)
+        else:
+            # 64-bit
+            MAXSIZE = int((1 << 63) - 1)
+        del X
+
+
+def _add_doc(func, doc):
+    """Add documentation to a function."""
+    func.__doc__ = doc
+
+
+def _import_module(name):
+    """Import module, returning the module after the last dot."""
+    __import__(name)
+    return sys.modules[name]
+
+
+class _LazyDescr(object):
+
+    def __init__(self, name):
+        self.name = name
+
+    def __get__(self, obj, tp):
+        result = self._resolve()
+        setattr(obj, self.name, result)  # Invokes __set__.
+        try:
+            # This is a bit ugly, but it avoids running this again by
+            # removing this descriptor.
+            delattr(obj.__class__, self.name)
+        except AttributeError:
+            pass
+        return result
+
+
+class MovedModule(_LazyDescr):
+
+    def __init__(self, name, old, new=None):
+        super(MovedModule, self).__init__(name)
+        if PY3:
+            if new is None:
+                new = name
+            self.mod = new
+        else:
+            self.mod = old
+
+    def _resolve(self):
+        return _import_module(self.mod)
+
+    def __getattr__(self, attr):
+        _module = self._resolve()
+        value = getattr(_module, attr)
+        setattr(self, attr, value)
+        return value
+
+
+class _LazyModule(types.ModuleType):
+
+    def __init__(self, name):
+        super(_LazyModule, self).__init__(name)
+        self.__doc__ = self.__class__.__doc__
+
+    def __dir__(self):
+        attrs = ["__doc__", "__name__"]
+        attrs += [attr.name for attr in self._moved_attributes]
+        return attrs
+
+    # Subclasses should override this
+    _moved_attributes = []
+
+
+class MovedAttribute(_LazyDescr):
+
+    def __init__(self, name, old_mod, new_mod, old_attr=None, new_attr=None):
+        super(MovedAttribute, self).__init__(name)
+        if PY3:
+            if new_mod is None:
+                new_mod = name
+            self.mod = new_mod
+            if new_attr is None:
+                if old_attr is None:
+                    new_attr = name
+                else:
+                    new_attr = old_attr
+            self.attr = new_attr
+        else:
+            self.mod = old_mod
+            if old_attr is None:
+                old_attr = name
+            self.attr = old_attr
+
+    def _resolve(self):
+        module = _import_module(self.mod)
+        return getattr(module, self.attr)
+
+
+class _SixMetaPathImporter(object):
+
+    """
+    A meta path importer to import six.moves and its submodules.
+
+    This class implements a PEP302 finder and loader. It should be compatible
+    with Python 2.5 and all existing versions of Python3
+    """
+
+    def __init__(self, six_module_name):
+        self.name = six_module_name
+        self.known_modules = {}
+
+    def _add_module(self, mod, *fullnames):
+        for fullname in fullnames:
+            self.known_modules[self.name + "." + fullname] = mod
+
+    def _get_module(self, fullname):
+        return self.known_modules[self.name + "." + fullname]
+
+    def find_module(self, fullname, path=None):
+        if fullname in self.known_modules:
+            return self
+        return None
+
+    def __get_module(self, fullname):
+        try:
+            return self.known_modules[fullname]
+        except KeyError:
+            raise ImportError("This loader does not know module " + fullname)
+
+    def load_module(self, fullname):
+        try:
+            # in case of a reload
+            return sys.modules[fullname]
+        except KeyError:
+            pass
+        mod = self.__get_module(fullname)
+        if isinstance(mod, MovedModule):
+            mod = mod._resolve()
+        else:
+            mod.__loader__ = self
+        sys.modules[fullname] = mod
+        return mod
+
+    def is_package(self, fullname):
+        """
+        Return true, if the named module is a package.
+
+        We need this method to get correct spec objects with
+        Python 3.4 (see PEP451)
+        """
+        return hasattr(self.__get_module(fullname), "__path__")
+
+    def get_code(self, fullname):
+        """Return None
+
+        Required, if is_package is implemented"""
+        self.__get_module(fullname)  # eventually raises ImportError
+        return None
+    get_source = get_code  # same as get_code
+
+_importer = _SixMetaPathImporter(__name__)
+
+
+class _MovedItems(_LazyModule):
+
+    """Lazy loading of moved objects"""
+    __path__ = []  # mark as package
+
+
+_moved_attributes = [
+    MovedAttribute("cStringIO", "cStringIO", "io", "StringIO"),
+    MovedAttribute("filter", "itertools", "builtins", "ifilter", "filter"),
+    MovedAttribute("filterfalse", "itertools", "itertools", "ifilterfalse", "filterfalse"),
+    MovedAttribute("input", "__builtin__", "builtins", "raw_input", "input"),
+    MovedAttribute("intern", "__builtin__", "sys"),
+    MovedAttribute("map", "itertools", "builtins", "imap", "map"),
+    MovedAttribute("getcwd", "os", "os", "getcwdu", "getcwd"),
+    MovedAttribute("getcwdb", "os", "os", "getcwd", "getcwdb"),
+    MovedAttribute("range", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("reload_module", "__builtin__", "importlib" if PY34 else "imp", "reload"),
+    MovedAttribute("reduce", "__builtin__", "functools"),
+    MovedAttribute("shlex_quote", "pipes", "shlex", "quote"),
+    MovedAttribute("StringIO", "StringIO", "io"),
+    MovedAttribute("UserDict", "UserDict", "collections"),
+    MovedAttribute("UserList", "UserList", "collections"),
+    MovedAttribute("UserString", "UserString", "collections"),
+    MovedAttribute("xrange", "__builtin__", "builtins", "xrange", "range"),
+    MovedAttribute("zip", "itertools", "builtins", "izip", "zip"),
+    MovedAttribute("zip_longest", "itertools", "itertools", "izip_longest", "zip_longest"),
+    MovedModule("builtins", "__builtin__"),
+    MovedModule("configparser", "ConfigParser"),
+    MovedModule("copyreg", "copy_reg"),
+    MovedModule("dbm_gnu", "gdbm", "dbm.gnu"),
+    MovedModule("_dummy_thread", "dummy_thread", "_dummy_thread"),
+    MovedModule("http_cookiejar", "cookielib", "http.cookiejar"),
+    MovedModule("http_cookies", "Cookie", "http.cookies"),
+    MovedModule("html_entities", "htmlentitydefs", "html.entities"),
+    MovedModule("html_parser", "HTMLParser", "html.parser"),
+    MovedModule("http_client", "httplib", "http.client"),
+    MovedModule("email_mime_multipart", "email.MIMEMultipart", "email.mime.multipart"),
+    MovedModule("email_mime_nonmultipart", "email.MIMENonMultipart", "email.mime.nonmultipart"),
+    MovedModule("email_mime_text", "email.MIMEText", "email.mime.text"),
+    MovedModule("email_mime_base", "email.MIMEBase", "email.mime.base"),
+    MovedModule("BaseHTTPServer", "BaseHTTPServer", "http.server"),
+    MovedModule("CGIHTTPServer", "CGIHTTPServer", "http.server"),
+    MovedModule("SimpleHTTPServer", "SimpleHTTPServer", "http.server"),
+    MovedModule("cPickle", "cPickle", "pickle"),
+    MovedModule("queue", "Queue"),
+    MovedModule("reprlib", "repr"),
+    MovedModule("socketserver", "SocketServer"),
+    MovedModule("_thread", "thread", "_thread"),
+    MovedModule("tkinter", "Tkinter"),
+    MovedModule("tkinter_dialog", "Dialog", "tkinter.dialog"),
+    MovedModule("tkinter_filedialog", "FileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_scrolledtext", "ScrolledText", "tkinter.scrolledtext"),
+    MovedModule("tkinter_simpledialog", "SimpleDialog", "tkinter.simpledialog"),
+    MovedModule("tkinter_tix", "Tix", "tkinter.tix"),
+    MovedModule("tkinter_ttk", "ttk", "tkinter.ttk"),
+    MovedModule("tkinter_constants", "Tkconstants", "tkinter.constants"),
+    MovedModule("tkinter_dnd", "Tkdnd", "tkinter.dnd"),
+    MovedModule("tkinter_colorchooser", "tkColorChooser",
+                "tkinter.colorchooser"),
+    MovedModule("tkinter_commondialog", "tkCommonDialog",
+                "tkinter.commondialog"),
+    MovedModule("tkinter_tkfiledialog", "tkFileDialog", "tkinter.filedialog"),
+    MovedModule("tkinter_font", "tkFont", "tkinter.font"),
+    MovedModule("tkinter_messagebox", "tkMessageBox", "tkinter.messagebox"),
+    MovedModule("tkinter_tksimpledialog", "tkSimpleDialog",
+                "tkinter.simpledialog"),
+    MovedModule("urllib_parse", __name__ + ".moves.urllib_parse", "urllib.parse"),
+    MovedModule("urllib_error", __name__ + ".moves.urllib_error", "urllib.error"),
+    MovedModule("urllib", __name__ + ".moves.urllib", __name__ + ".moves.urllib"),
+    MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
+    MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
+    MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
+]
+# Add windows specific modules.
+if sys.platform == "win32":
+    _moved_attributes += [
+        MovedModule("winreg", "_winreg"),
+    ]
+
+for attr in _moved_attributes:
+    setattr(_MovedItems, attr.name, attr)
+    if isinstance(attr, MovedModule):
+        _importer._add_module(attr, "moves." + attr.name)
+del attr
+
+_MovedItems._moved_attributes = _moved_attributes
+
+moves = _MovedItems(__name__ + ".moves")
+_importer._add_module(moves, "moves")
+
+
+class Module_six_moves_urllib_parse(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_parse"""
+
+
+_urllib_parse_moved_attributes = [
+    MovedAttribute("ParseResult", "urlparse", "urllib.parse"),
+    MovedAttribute("SplitResult", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qs", "urlparse", "urllib.parse"),
+    MovedAttribute("parse_qsl", "urlparse", "urllib.parse"),
+    MovedAttribute("urldefrag", "urlparse", "urllib.parse"),
+    MovedAttribute("urljoin", "urlparse", "urllib.parse"),
+    MovedAttribute("urlparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunparse", "urlparse", "urllib.parse"),
+    MovedAttribute("urlunsplit", "urlparse", "urllib.parse"),
+    MovedAttribute("quote", "urllib", "urllib.parse"),
+    MovedAttribute("quote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("unquote", "urllib", "urllib.parse"),
+    MovedAttribute("unquote_plus", "urllib", "urllib.parse"),
+    MovedAttribute("urlencode", "urllib", "urllib.parse"),
+    MovedAttribute("splitquery", "urllib", "urllib.parse"),
+    MovedAttribute("splittag", "urllib", "urllib.parse"),
+    MovedAttribute("splituser", "urllib", "urllib.parse"),
+    MovedAttribute("uses_fragment", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_netloc", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_params", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_query", "urlparse", "urllib.parse"),
+    MovedAttribute("uses_relative", "urlparse", "urllib.parse"),
+]
+for attr in _urllib_parse_moved_attributes:
+    setattr(Module_six_moves_urllib_parse, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_parse._moved_attributes = _urllib_parse_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_parse(__name__ + ".moves.urllib_parse"),
+                      "moves.urllib_parse", "moves.urllib.parse")
+
+
+class Module_six_moves_urllib_error(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_error"""
+
+
+_urllib_error_moved_attributes = [
+    MovedAttribute("URLError", "urllib2", "urllib.error"),
+    MovedAttribute("HTTPError", "urllib2", "urllib.error"),
+    MovedAttribute("ContentTooShortError", "urllib", "urllib.error"),
+]
+for attr in _urllib_error_moved_attributes:
+    setattr(Module_six_moves_urllib_error, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_error._moved_attributes = _urllib_error_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_error(__name__ + ".moves.urllib.error"),
+                      "moves.urllib_error", "moves.urllib.error")
+
+
+class Module_six_moves_urllib_request(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_request"""
+
+
+_urllib_request_moved_attributes = [
+    MovedAttribute("urlopen", "urllib2", "urllib.request"),
+    MovedAttribute("install_opener", "urllib2", "urllib.request"),
+    MovedAttribute("build_opener", "urllib2", "urllib.request"),
+    MovedAttribute("pathname2url", "urllib", "urllib.request"),
+    MovedAttribute("url2pathname", "urllib", "urllib.request"),
+    MovedAttribute("getproxies", "urllib", "urllib.request"),
+    MovedAttribute("Request", "urllib2", "urllib.request"),
+    MovedAttribute("OpenerDirector", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDefaultErrorHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPRedirectHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPCookieProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyHandler", "urllib2", "urllib.request"),
+    MovedAttribute("BaseHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgr", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPPasswordMgrWithDefaultRealm", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyBasicAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("AbstractDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("ProxyDigestAuthHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPSHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FileHandler", "urllib2", "urllib.request"),
+    MovedAttribute("FTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("CacheFTPHandler", "urllib2", "urllib.request"),
+    MovedAttribute("UnknownHandler", "urllib2", "urllib.request"),
+    MovedAttribute("HTTPErrorProcessor", "urllib2", "urllib.request"),
+    MovedAttribute("urlretrieve", "urllib", "urllib.request"),
+    MovedAttribute("urlcleanup", "urllib", "urllib.request"),
+    MovedAttribute("URLopener", "urllib", "urllib.request"),
+    MovedAttribute("FancyURLopener", "urllib", "urllib.request"),
+    MovedAttribute("proxy_bypass", "urllib", "urllib.request"),
+]
+for attr in _urllib_request_moved_attributes:
+    setattr(Module_six_moves_urllib_request, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_request._moved_attributes = _urllib_request_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_request(__name__ + ".moves.urllib.request"),
+                      "moves.urllib_request", "moves.urllib.request")
+
+
+class Module_six_moves_urllib_response(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_response"""
+
+
+_urllib_response_moved_attributes = [
+    MovedAttribute("addbase", "urllib", "urllib.response"),
+    MovedAttribute("addclosehook", "urllib", "urllib.response"),
+    MovedAttribute("addinfo", "urllib", "urllib.response"),
+    MovedAttribute("addinfourl", "urllib", "urllib.response"),
+]
+for attr in _urllib_response_moved_attributes:
+    setattr(Module_six_moves_urllib_response, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_response._moved_attributes = _urllib_response_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_response(__name__ + ".moves.urllib.response"),
+                      "moves.urllib_response", "moves.urllib.response")
+
+
+class Module_six_moves_urllib_robotparser(_LazyModule):
+
+    """Lazy loading of moved objects in six.moves.urllib_robotparser"""
+
+
+_urllib_robotparser_moved_attributes = [
+    MovedAttribute("RobotFileParser", "robotparser", "urllib.robotparser"),
+]
+for attr in _urllib_robotparser_moved_attributes:
+    setattr(Module_six_moves_urllib_robotparser, attr.name, attr)
+del attr
+
+Module_six_moves_urllib_robotparser._moved_attributes = _urllib_robotparser_moved_attributes
+
+_importer._add_module(Module_six_moves_urllib_robotparser(__name__ + ".moves.urllib.robotparser"),
+                      "moves.urllib_robotparser", "moves.urllib.robotparser")
+
+
+class Module_six_moves_urllib(types.ModuleType):
+
+    """Create a six.moves.urllib namespace that resembles the Python 3 namespace"""
+    __path__ = []  # mark as package
+    parse = _importer._get_module("moves.urllib_parse")
+    error = _importer._get_module("moves.urllib_error")
+    request = _importer._get_module("moves.urllib_request")
+    response = _importer._get_module("moves.urllib_response")
+    robotparser = _importer._get_module("moves.urllib_robotparser")
+
+    def __dir__(self):
+        return ['parse', 'error', 'request', 'response', 'robotparser']
+
+_importer._add_module(Module_six_moves_urllib(__name__ + ".moves.urllib"),
+                      "moves.urllib")
+
+
+def add_move(move):
+    """Add an item to six.moves."""
+    setattr(_MovedItems, move.name, move)
+
+
+def remove_move(name):
+    """Remove item from six.moves."""
+    try:
+        delattr(_MovedItems, name)
+    except AttributeError:
+        try:
+            del moves.__dict__[name]
+        except KeyError:
+            raise AttributeError("no such move, %r" % (name,))
+
+
+if PY3:
+    _meth_func = "__func__"
+    _meth_self = "__self__"
+
+    _func_closure = "__closure__"
+    _func_code = "__code__"
+    _func_defaults = "__defaults__"
+    _func_globals = "__globals__"
+else:
+    _meth_func = "im_func"
+    _meth_self = "im_self"
+
+    _func_closure = "func_closure"
+    _func_code = "func_code"
+    _func_defaults = "func_defaults"
+    _func_globals = "func_globals"
+
+
+try:
+    advance_iterator = next
+except NameError:
+    def advance_iterator(it):
+        return it.next()
+next = advance_iterator
+
+
+try:
+    callable = callable
+except NameError:
+    def callable(obj):
+        return any("__call__" in klass.__dict__ for klass in type(obj).__mro__)
+
+
+if PY3:
+    def get_unbound_function(unbound):
+        return unbound
+
+    create_bound_method = types.MethodType
+
+    def create_unbound_method(func, cls):
+        return func
+
+    Iterator = object
+else:
+    def get_unbound_function(unbound):
+        return unbound.im_func
+
+    def create_bound_method(func, obj):
+        return types.MethodType(func, obj, obj.__class__)
+
+    def create_unbound_method(func, cls):
+        return types.MethodType(func, None, cls)
+
+    class Iterator(object):
+
+        def next(self):
+            return type(self).__next__(self)
+
+    callable = callable
+_add_doc(get_unbound_function,
+         """Get the function out of a possibly unbound function""")
+
+
+get_method_function = operator.attrgetter(_meth_func)
+get_method_self = operator.attrgetter(_meth_self)
+get_function_closure = operator.attrgetter(_func_closure)
+get_function_code = operator.attrgetter(_func_code)
+get_function_defaults = operator.attrgetter(_func_defaults)
+get_function_globals = operator.attrgetter(_func_globals)
+
+
+if PY3:
+    def iterkeys(d, **kw):
+        return iter(d.keys(**kw))
+
+    def itervalues(d, **kw):
+        return iter(d.values(**kw))
+
+    def iteritems(d, **kw):
+        return iter(d.items(**kw))
+
+    def iterlists(d, **kw):
+        return iter(d.lists(**kw))
+
+    viewkeys = operator.methodcaller("keys")
+
+    viewvalues = operator.methodcaller("values")
+
+    viewitems = operator.methodcaller("items")
+else:
+    def iterkeys(d, **kw):
+        return d.iterkeys(**kw)
+
+    def itervalues(d, **kw):
+        return d.itervalues(**kw)
+
+    def iteritems(d, **kw):
+        return d.iteritems(**kw)
+
+    def iterlists(d, **kw):
+        return d.iterlists(**kw)
+
+    viewkeys = operator.methodcaller("viewkeys")
+
+    viewvalues = operator.methodcaller("viewvalues")
+
+    viewitems = operator.methodcaller("viewitems")
+
+_add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
+_add_doc(itervalues, "Return an iterator over the values of a dictionary.")
+_add_doc(iteritems,
+         "Return an iterator over the (key, value) pairs of a dictionary.")
+_add_doc(iterlists,
+         "Return an iterator over the (key, [values]) pairs of a dictionary.")
+
+
+if PY3:
+    def b(s):
+        return s.encode("latin-1")
+
+    def u(s):
+        return s
+    unichr = chr
+    import struct
+    int2byte = struct.Struct(">B").pack
+    del struct
+    byte2int = operator.itemgetter(0)
+    indexbytes = operator.getitem
+    iterbytes = iter
+    import io
+    StringIO = io.StringIO
+    BytesIO = io.BytesIO
+    _assertCountEqual = "assertCountEqual"
+    if sys.version_info[1] <= 1:
+        _assertRaisesRegex = "assertRaisesRegexp"
+        _assertRegex = "assertRegexpMatches"
+    else:
+        _assertRaisesRegex = "assertRaisesRegex"
+        _assertRegex = "assertRegex"
+else:
+    def b(s):
+        return s
+    # Workaround for standalone backslash
+
+    def u(s):
+        return unicode(s.replace(r'\\', r'\\\\'), "unicode_escape")
+    unichr = unichr
+    int2byte = chr
+
+    def byte2int(bs):
+        return ord(bs[0])
+
+    def indexbytes(buf, i):
+        return ord(buf[i])
+    iterbytes = functools.partial(itertools.imap, ord)
+    import StringIO
+    StringIO = BytesIO = StringIO.StringIO
+    _assertCountEqual = "assertItemsEqual"
+    _assertRaisesRegex = "assertRaisesRegexp"
+    _assertRegex = "assertRegexpMatches"
+_add_doc(b, """Byte literal""")
+_add_doc(u, """Text literal""")
+
+
+def assertCountEqual(self, *args, **kwargs):
+    return getattr(self, _assertCountEqual)(*args, **kwargs)
+
+
+def assertRaisesRegex(self, *args, **kwargs):
+    return getattr(self, _assertRaisesRegex)(*args, **kwargs)
+
+
+def assertRegex(self, *args, **kwargs):
+    return getattr(self, _assertRegex)(*args, **kwargs)
+
+
+if PY3:
+    exec_ = getattr(moves.builtins, "exec")
+
+    def reraise(tp, value, tb=None):
+        if value is None:
+            value = tp()
+        if value.__traceback__ is not tb:
+            raise value.with_traceback(tb)
+        raise value
+
+else:
+    def exec_(_code_, _globs_=None, _locs_=None):
+        """Execute code in a namespace."""
+        if _globs_ is None:
+            frame = sys._getframe(1)
+            _globs_ = frame.f_globals
+            if _locs_ is None:
+                _locs_ = frame.f_locals
+            del frame
+        elif _locs_ is None:
+            _locs_ = _globs_
+        exec("""exec _code_ in _globs_, _locs_""")
+
+    exec_("""def reraise(tp, value, tb=None):
+    raise tp, value, tb
+""")
+
+
+if sys.version_info[:2] == (3, 2):
+    exec_("""def raise_from(value, from_value):
+    if from_value is None:
+        raise value
+    raise value from from_value
+""")
+elif sys.version_info[:2] > (3, 2):
+    exec_("""def raise_from(value, from_value):
+    raise value from from_value
+""")
+else:
+    def raise_from(value, from_value):
+        raise value
+
+
+print_ = getattr(moves.builtins, "print", None)
+if print_ is None:
+    def print_(*args, **kwargs):
+        """The new-style print function for Python 2.4 and 2.5."""
+        fp = kwargs.pop("file", sys.stdout)
+        if fp is None:
+            return
+
+        def write(data):
+            if not isinstance(data, basestring):
+                data = str(data)
+            # If the file has an encoding, encode unicode with it.
+            if (isinstance(fp, file) and
+                    isinstance(data, unicode) and
+                    fp.encoding is not None):
+                errors = getattr(fp, "errors", None)
+                if errors is None:
+                    errors = "strict"
+                data = data.encode(fp.encoding, errors)
+            fp.write(data)
+        want_unicode = False
+        sep = kwargs.pop("sep", None)
+        if sep is not None:
+            if isinstance(sep, unicode):
+                want_unicode = True
+            elif not isinstance(sep, str):
+                raise TypeError("sep must be None or a string")
+        end = kwargs.pop("end", None)
+        if end is not None:
+            if isinstance(end, unicode):
+                want_unicode = True
+            elif not isinstance(end, str):
+                raise TypeError("end must be None or a string")
+        if kwargs:
+            raise TypeError("invalid keyword arguments to print()")
+        if not want_unicode:
+            for arg in args:
+                if isinstance(arg, unicode):
+                    want_unicode = True
+                    break
+        if want_unicode:
+            newline = unicode("\n")
+            space = unicode(" ")
+        else:
+            newline = "\n"
+            space = " "
+        if sep is None:
+            sep = space
+        if end is None:
+            end = newline
+        for i, arg in enumerate(args):
+            if i:
+                write(sep)
+            write(arg)
+        write(end)
+if sys.version_info[:2] < (3, 3):
+    _print = print_
+
+    def print_(*args, **kwargs):
+        fp = kwargs.get("file", sys.stdout)
+        flush = kwargs.pop("flush", False)
+        _print(*args, **kwargs)
+        if flush and fp is not None:
+            fp.flush()
+
+_add_doc(reraise, """Reraise an exception.""")
+
+if sys.version_info[0:2] < (3, 4):
+    def wraps(wrapped, assigned=functools.WRAPPER_ASSIGNMENTS,
+              updated=functools.WRAPPER_UPDATES):
+        def wrapper(f):
+            f = functools.wraps(wrapped, assigned, updated)(f)
+            f.__wrapped__ = wrapped
+            return f
+        return wrapper
+else:
+    wraps = functools.wraps
+
+
+def with_metaclass(meta, *bases):
+    """Create a base class with a metaclass."""
+    # This requires a bit of explanation: the basic idea is to make a dummy
+    # metaclass for one level of class instantiation that replaces itself with
+    # the actual metaclass.
+    class metaclass(meta):
+
+        def __new__(cls, name, this_bases, d):
+            return meta(name, bases, d)
+    return type.__new__(metaclass, 'temporary_class', (), {})
+
+
+def add_metaclass(metaclass):
+    """Class decorator for creating a class with a metaclass."""
+    def wrapper(cls):
+        orig_vars = cls.__dict__.copy()
+        slots = orig_vars.get('__slots__')
+        if slots is not None:
+            if isinstance(slots, str):
+                slots = [slots]
+            for slots_var in slots:
+                orig_vars.pop(slots_var)
+        orig_vars.pop('__dict__', None)
+        orig_vars.pop('__weakref__', None)
+        return metaclass(cls.__name__, cls.__bases__, orig_vars)
+    return wrapper
+
+
+def python_2_unicode_compatible(klass):
+    """
+    A decorator that defines __unicode__ and __str__ methods under Python 2.
+    Under Python 3 it does nothing.
+
+    To support Python 2 and 3 with a single code base, define a __str__ method
+    returning text and apply this decorator to the class.
+    """
+    if PY2:
+        if '__str__' not in klass.__dict__:
+            raise ValueError("@python_2_unicode_compatible cannot be applied "
+                             "to %s because it doesn't define __str__()." %
+                             klass.__name__)
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+# Complete the moves implementation.
+# This code is at the end of this module to speed up module loading.
+# Turn this module into a package.
+__path__ = []  # required for PEP 302 and PEP 451
+__package__ = __name__  # see PEP 366 @ReservedAssignment
+if globals().get("__spec__") is not None:
+    __spec__.submodule_search_locations = []  # PEP 451 @UndefinedVariable
+# Remove other six meta path importers, since they cause problems. This can
+# happen if six is removed from sys.modules and then reloaded. (Setuptools does
+# this for some reason.)
+if sys.meta_path:
+    for i, importer in enumerate(sys.meta_path):
+        # Here's some real nastiness: Another "instance" of the six module might
+        # be floating around. Therefore, we can't use isinstance() to check for
+        # the six meta path importer, since the other six instance will have
+        # inserted an importer with different class.
+        if (type(importer).__name__ == "_SixMetaPathImporter" and
+                importer.name == __name__):
+            del sys.meta_path[i]
+            break
+    del i, importer
+# Finally, add the importer to the meta path import hook.
+sys.meta_path.append(_importer)
diff --git a/venv/lib/python3.9/site-packages/setuptools/archive_util.py b/venv/lib/python3.9/site-packages/setuptools/archive_util.py
new file mode 100644
index 0000000..8143604
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/archive_util.py
@@ -0,0 +1,173 @@
+"""Utilities for extracting common archive formats"""
+
+import zipfile
+import tarfile
+import os
+import shutil
+import posixpath
+import contextlib
+from distutils.errors import DistutilsError
+
+from pkg_resources import ensure_directory
+
+__all__ = [
+    "unpack_archive", "unpack_zipfile", "unpack_tarfile", "default_filter",
+    "UnrecognizedFormat", "extraction_drivers", "unpack_directory",
+]
+
+
+class UnrecognizedFormat(DistutilsError):
+    """Couldn't recognize the archive type"""
+
+
+def default_filter(src, dst):
+    """The default progress/filter callback; returns True for all files"""
+    return dst
+
+
+def unpack_archive(filename, extract_dir, progress_filter=default_filter,
+        drivers=None):
+    """Unpack `filename` to `extract_dir`, or raise ``UnrecognizedFormat``
+
+    `progress_filter` is a function taking two arguments: a source path
+    internal to the archive ('/'-separated), and a filesystem path where it
+    will be extracted.  The callback must return the desired extract path
+    (which may be the same as the one passed in), or else ``None`` to skip
+    that file or directory.  The callback can thus be used to report on the
+    progress of the extraction, as well as to filter the items extracted or
+    alter their extraction paths.
+
+    `drivers`, if supplied, must be a non-empty sequence of functions with the
+    same signature as this function (minus the `drivers` argument), that raise
+    ``UnrecognizedFormat`` if they do not support extracting the designated
+    archive type.  The `drivers` are tried in sequence until one is found that
+    does not raise an error, or until all are exhausted (in which case
+    ``UnrecognizedFormat`` is raised).  If you do not supply a sequence of
+    drivers, the module's ``extraction_drivers`` constant will be used, which
+    means that ``unpack_zipfile`` and ``unpack_tarfile`` will be tried, in that
+    order.
+    """
+    for driver in drivers or extraction_drivers:
+        try:
+            driver(filename, extract_dir, progress_filter)
+        except UnrecognizedFormat:
+            continue
+        else:
+            return
+    else:
+        raise UnrecognizedFormat(
+            "Not a recognized archive type: %s" % filename
+        )
+
+
+def unpack_directory(filename, extract_dir, progress_filter=default_filter):
+    """"Unpack" a directory, using the same interface as for archives
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a directory
+    """
+    if not os.path.isdir(filename):
+        raise UnrecognizedFormat("%s is not a directory" % filename)
+
+    paths = {
+        filename: ('', extract_dir),
+    }
+    for base, dirs, files in os.walk(filename):
+        src, dst = paths[base]
+        for d in dirs:
+            paths[os.path.join(base, d)] = src + d + '/', os.path.join(dst, d)
+        for f in files:
+            target = os.path.join(dst, f)
+            target = progress_filter(src + f, target)
+            if not target:
+                # skip non-files
+                continue
+            ensure_directory(target)
+            f = os.path.join(base, f)
+            shutil.copyfile(f, target)
+            shutil.copystat(f, target)
+
+
+def unpack_zipfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack zip `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a zipfile (as determined
+    by ``zipfile.is_zipfile()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+
+    if not zipfile.is_zipfile(filename):
+        raise UnrecognizedFormat("%s is not a zip file" % (filename,))
+
+    with zipfile.ZipFile(filename) as z:
+        for info in z.infolist():
+            name = info.filename
+
+            # don't extract absolute paths or ones with .. in them
+            if name.startswith('/') or '..' in name.split('/'):
+                continue
+
+            target = os.path.join(extract_dir, *name.split('/'))
+            target = progress_filter(name, target)
+            if not target:
+                continue
+            if name.endswith('/'):
+                # directory
+                ensure_directory(target)
+            else:
+                # file
+                ensure_directory(target)
+                data = z.read(info.filename)
+                with open(target, 'wb') as f:
+                    f.write(data)
+            unix_attributes = info.external_attr >> 16
+            if unix_attributes:
+                os.chmod(target, unix_attributes)
+
+
+def unpack_tarfile(filename, extract_dir, progress_filter=default_filter):
+    """Unpack tar/tar.gz/tar.bz2 `filename` to `extract_dir`
+
+    Raises ``UnrecognizedFormat`` if `filename` is not a tarfile (as determined
+    by ``tarfile.open()``).  See ``unpack_archive()`` for an explanation
+    of the `progress_filter` argument.
+    """
+    try:
+        tarobj = tarfile.open(filename)
+    except tarfile.TarError:
+        raise UnrecognizedFormat(
+            "%s is not a compressed or uncompressed tar file" % (filename,)
+        )
+    with contextlib.closing(tarobj):
+        # don't do any chowning!
+        tarobj.chown = lambda *args: None
+        for member in tarobj:
+            name = member.name
+            # don't extract absolute paths or ones with .. in them
+            if not name.startswith('/') and '..' not in name.split('/'):
+                prelim_dst = os.path.join(extract_dir, *name.split('/'))
+
+                # resolve any links and to extract the link targets as normal
+                # files
+                while member is not None and (member.islnk() or member.issym()):
+                    linkpath = member.linkname
+                    if member.issym():
+                        base = posixpath.dirname(member.name)
+                        linkpath = posixpath.join(base, linkpath)
+                        linkpath = posixpath.normpath(linkpath)
+                    member = tarobj._getmember(linkpath)
+
+                if member is not None and (member.isfile() or member.isdir()):
+                    final_dst = progress_filter(name, prelim_dst)
+                    if final_dst:
+                        if final_dst.endswith(os.sep):
+                            final_dst = final_dst[:-1]
+                        try:
+                            # XXX Ugh
+                            tarobj._extract_member(member, final_dst)
+                        except tarfile.ExtractError:
+                            # chown/chmod/mkfifo/mknode/makedev failed
+                            pass
+        return True
+
+
+extraction_drivers = unpack_directory, unpack_zipfile, unpack_tarfile
diff --git a/venv/lib/python3.9/site-packages/setuptools/build_meta.py b/venv/lib/python3.9/site-packages/setuptools/build_meta.py
new file mode 100644
index 0000000..eb9e815
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/build_meta.py
@@ -0,0 +1,264 @@
+"""A PEP 517 interface to setuptools
+
+Previously, when a user or a command line tool (let's call it a "frontend")
+needed to make a request of setuptools to take a certain action, for
+example, generating a list of installation requirements, the frontend would
+would call "setup.py egg_info" or "setup.py bdist_wheel" on the command line.
+
+PEP 517 defines a different method of interfacing with setuptools. Rather
+than calling "setup.py" directly, the frontend should:
+
+  1. Set the current directory to the directory with a setup.py file
+  2. Import this module into a safe python interpreter (one in which
+     setuptools can potentially set global variables or crash hard).
+  3. Call one of the functions defined in PEP 517.
+
+What each function does is defined in PEP 517. However, here is a "casual"
+definition of the functions (this definition should not be relied on for
+bug reports or API stability):
+
+  - `build_wheel`: build a wheel in the folder and return the basename
+  - `get_requires_for_build_wheel`: get the `setup_requires` to build
+  - `prepare_metadata_for_build_wheel`: get the `install_requires`
+  - `build_sdist`: build an sdist in the folder and return the basename
+  - `get_requires_for_build_sdist`: get the `setup_requires` to build
+
+Again, this is not a formal definition! Just a "taste" of the module.
+"""
+
+import io
+import os
+import sys
+import tokenize
+import shutil
+import contextlib
+
+import setuptools
+import distutils
+from setuptools.py31compat import TemporaryDirectory
+
+from pkg_resources import parse_requirements
+from pkg_resources.py31compat import makedirs
+
+__all__ = ['get_requires_for_build_sdist',
+           'get_requires_for_build_wheel',
+           'prepare_metadata_for_build_wheel',
+           'build_wheel',
+           'build_sdist',
+           '__legacy__',
+           'SetupRequirementsError']
+
+class SetupRequirementsError(BaseException):
+    def __init__(self, specifiers):
+        self.specifiers = specifiers
+
+
+class Distribution(setuptools.dist.Distribution):
+    def fetch_build_eggs(self, specifiers):
+        specifier_list = list(map(str, parse_requirements(specifiers)))
+
+        raise SetupRequirementsError(specifier_list)
+
+    @classmethod
+    @contextlib.contextmanager
+    def patch(cls):
+        """
+        Replace
+        distutils.dist.Distribution with this class
+        for the duration of this context.
+        """
+        orig = distutils.core.Distribution
+        distutils.core.Distribution = cls
+        try:
+            yield
+        finally:
+            distutils.core.Distribution = orig
+
+
+def _to_str(s):
+    """
+    Convert a filename to a string (on Python 2, explicitly
+    a byte string, not Unicode) as distutils checks for the
+    exact type str.
+    """
+    if sys.version_info[0] == 2 and not isinstance(s, str):
+        # Assume it's Unicode, as that's what the PEP says
+        # should be provided.
+        return s.encode(sys.getfilesystemencoding())
+    return s
+
+
+def _get_immediate_subdirectories(a_dir):
+    return [name for name in os.listdir(a_dir)
+            if os.path.isdir(os.path.join(a_dir, name))]
+
+
+def _file_with_extension(directory, extension):
+    matching = (
+        f for f in os.listdir(directory)
+        if f.endswith(extension)
+    )
+    file, = matching
+    return file
+
+
+def _open_setup_script(setup_script):
+    if not os.path.exists(setup_script):
+        # Supply a default setup.py
+        return io.StringIO(u"from setuptools import setup; setup()")
+
+    return getattr(tokenize, 'open', open)(setup_script)
+
+
+class _BuildMetaBackend(object):
+
+    def _fix_config(self, config_settings):
+        config_settings = config_settings or {}
+        config_settings.setdefault('--global-option', [])
+        return config_settings
+
+    def _get_build_requires(self, config_settings, requirements):
+        config_settings = self._fix_config(config_settings)
+
+        sys.argv = sys.argv[:1] + ['egg_info'] + \
+            config_settings["--global-option"]
+        try:
+            with Distribution.patch():
+                self.run_setup()
+        except SetupRequirementsError as e:
+            requirements += e.specifiers
+
+        return requirements
+
+    def run_setup(self, setup_script='setup.py'):
+        # Note that we can reuse our build directory between calls
+        # Correctness comes first, then optimization later
+        __file__ = setup_script
+        __name__ = '__main__'
+
+        with _open_setup_script(__file__) as f:
+            code = f.read().replace(r'\r\n', r'\n')
+
+        exec(compile(code, __file__, 'exec'), locals())
+
+    def get_requires_for_build_wheel(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=['wheel'])
+
+    def get_requires_for_build_sdist(self, config_settings=None):
+        config_settings = self._fix_config(config_settings)
+        return self._get_build_requires(config_settings, requirements=[])
+
+    def prepare_metadata_for_build_wheel(self, metadata_directory,
+                                         config_settings=None):
+        sys.argv = sys.argv[:1] + ['dist_info', '--egg-base',
+                                   _to_str(metadata_directory)]
+        self.run_setup()
+
+        dist_info_directory = metadata_directory
+        while True:
+            dist_infos = [f for f in os.listdir(dist_info_directory)
+                          if f.endswith('.dist-info')]
+
+            if (len(dist_infos) == 0 and
+                len(_get_immediate_subdirectories(dist_info_directory)) == 1):
+
+                dist_info_directory = os.path.join(
+                    dist_info_directory, os.listdir(dist_info_directory)[0])
+                continue
+
+            assert len(dist_infos) == 1
+            break
+
+        # PEP 517 requires that the .dist-info directory be placed in the
+        # metadata_directory. To comply, we MUST copy the directory to the root
+        if dist_info_directory != metadata_directory:
+            shutil.move(
+                os.path.join(dist_info_directory, dist_infos[0]),
+                metadata_directory)
+            shutil.rmtree(dist_info_directory, ignore_errors=True)
+
+        return dist_infos[0]
+
+    def _build_with_temp_dir(self, setup_command, result_extension,
+                             result_directory, config_settings):
+        config_settings = self._fix_config(config_settings)
+        result_directory = os.path.abspath(result_directory)
+
+        # Build in a temporary directory, then copy to the target.
+        makedirs(result_directory, exist_ok=True)
+        with TemporaryDirectory(dir=result_directory) as tmp_dist_dir:
+            sys.argv = (sys.argv[:1] + setup_command +
+                        ['--dist-dir', tmp_dist_dir] +
+                        config_settings["--global-option"])
+            self.run_setup()
+
+            result_basename = _file_with_extension(tmp_dist_dir, result_extension)
+            result_path = os.path.join(result_directory, result_basename)
+            if os.path.exists(result_path):
+                # os.rename will fail overwriting on non-Unix.
+                os.remove(result_path)
+            os.rename(os.path.join(tmp_dist_dir, result_basename), result_path)
+
+        return result_basename
+
+
+    def build_wheel(self, wheel_directory, config_settings=None,
+                    metadata_directory=None):
+        return self._build_with_temp_dir(['bdist_wheel'], '.whl',
+                                         wheel_directory, config_settings)
+
+    def build_sdist(self, sdist_directory, config_settings=None):
+        return self._build_with_temp_dir(['sdist', '--formats', 'gztar'],
+                                         '.tar.gz', sdist_directory,
+                                         config_settings)
+
+
+class _BuildMetaLegacyBackend(_BuildMetaBackend):
+    """Compatibility backend for setuptools
+
+    This is a version of setuptools.build_meta that endeavors to maintain backwards
+    compatibility with pre-PEP 517 modes of invocation. It exists as a temporary
+    bridge between the old packaging mechanism and the new packaging mechanism,
+    and will eventually be removed.
+    """
+    def run_setup(self, setup_script='setup.py'):
+        # In order to maintain compatibility with scripts assuming that
+        # the setup.py script is in a directory on the PYTHONPATH, inject
+        # '' into sys.path. (pypa/setuptools#1642)
+        sys_path = list(sys.path)           # Save the original path
+
+        script_dir = os.path.dirname(os.path.abspath(setup_script))
+        if script_dir not in sys.path:
+            sys.path.insert(0, script_dir)
+
+        # Some setup.py scripts (e.g. in pygame and numpy) use sys.argv[0] to
+        # get the directory of the source code. They expect it to refer to the
+        # setup.py script.
+        sys_argv_0 = sys.argv[0]
+        sys.argv[0] = setup_script
+
+        try:
+            super(_BuildMetaLegacyBackend,
+                  self).run_setup(setup_script=setup_script)
+        finally:
+            # While PEP 517 frontends should be calling each hook in a fresh
+            # subprocess according to the standard (and thus it should not be
+            # strictly necessary to restore the old sys.path), we'll restore
+            # the original path so that the path manipulation does not persist
+            # within the hook after run_setup is called.
+            sys.path[:] = sys_path
+            sys.argv[0] = sys_argv_0
+
+# The primary backend
+_BACKEND = _BuildMetaBackend()
+
+get_requires_for_build_wheel = _BACKEND.get_requires_for_build_wheel
+get_requires_for_build_sdist = _BACKEND.get_requires_for_build_sdist
+prepare_metadata_for_build_wheel = _BACKEND.prepare_metadata_for_build_wheel
+build_wheel = _BACKEND.build_wheel
+build_sdist = _BACKEND.build_sdist
+
+
+# The legacy backend
+__legacy__ = _BuildMetaLegacyBackend()
diff --git a/venv/lib/python3.9/site-packages/setuptools/cli-32.exe b/venv/lib/python3.9/site-packages/setuptools/cli-32.exe
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diff --git a/venv/lib/python3.9/site-packages/setuptools/command/__init__.py b/venv/lib/python3.9/site-packages/setuptools/command/__init__.py
new file mode 100644
index 0000000..743f558
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/__init__.py
@@ -0,0 +1,17 @@
+__all__ = [
+    'alias', 'bdist_egg', 'bdist_rpm', 'build_ext', 'build_py', 'develop',
+    'easy_install', 'egg_info', 'install', 'install_lib', 'rotate', 'saveopts',
+    'sdist', 'setopt', 'test', 'install_egg_info', 'install_scripts',
+    'bdist_wininst', 'upload_docs', 'build_clib', 'dist_info',
+]
+
+from distutils.command.bdist import bdist
+import sys
+
+from setuptools.command import install_scripts
+
+if 'egg' not in bdist.format_commands:
+    bdist.format_command['egg'] = ('bdist_egg', "Python .egg file")
+    bdist.format_commands.append('egg')
+
+del bdist, sys
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diff --git a/venv/lib/python3.9/site-packages/setuptools/command/alias.py b/venv/lib/python3.9/site-packages/setuptools/command/alias.py
new file mode 100644
index 0000000..4532b1c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/alias.py
@@ -0,0 +1,80 @@
+from distutils.errors import DistutilsOptionError
+
+from setuptools.extern.six.moves import map
+
+from setuptools.command.setopt import edit_config, option_base, config_file
+
+
+def shquote(arg):
+    """Quote an argument for later parsing by shlex.split()"""
+    for c in '"', "'", "\\", "#":
+        if c in arg:
+            return repr(arg)
+    if arg.split() != [arg]:
+        return repr(arg)
+    return arg
+
+
+class alias(option_base):
+    """Define a shortcut that invokes one or more commands"""
+
+    description = "define a shortcut to invoke one or more commands"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('remove', 'r', 'remove (unset) the alias'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.args = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.remove and len(self.args) != 1:
+            raise DistutilsOptionError(
+                "Must specify exactly one argument (the alias name) when "
+                "using --remove"
+            )
+
+    def run(self):
+        aliases = self.distribution.get_option_dict('aliases')
+
+        if not self.args:
+            print("Command Aliases")
+            print("---------------")
+            for alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+            return
+
+        elif len(self.args) == 1:
+            alias, = self.args
+            if self.remove:
+                command = None
+            elif alias in aliases:
+                print("setup.py alias", format_alias(alias, aliases))
+                return
+            else:
+                print("No alias definition found for %r" % alias)
+                return
+        else:
+            alias = self.args[0]
+            command = ' '.join(map(shquote, self.args[1:]))
+
+        edit_config(self.filename, {'aliases': {alias: command}}, self.dry_run)
+
+
+def format_alias(name, aliases):
+    source, command = aliases[name]
+    if source == config_file('global'):
+        source = '--global-config '
+    elif source == config_file('user'):
+        source = '--user-config '
+    elif source == config_file('local'):
+        source = ''
+    else:
+        source = '--filename=%r' % source
+    return source + name + ' ' + command
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/bdist_egg.py b/venv/lib/python3.9/site-packages/setuptools/command/bdist_egg.py
new file mode 100644
index 0000000..98470f1
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/bdist_egg.py
@@ -0,0 +1,502 @@
+"""setuptools.command.bdist_egg
+
+Build .egg distributions"""
+
+from distutils.errors import DistutilsSetupError
+from distutils.dir_util import remove_tree, mkpath
+from distutils import log
+from types import CodeType
+import sys
+import os
+import re
+import textwrap
+import marshal
+
+from setuptools.extern import six
+
+from pkg_resources import get_build_platform, Distribution, ensure_directory
+from pkg_resources import EntryPoint
+from setuptools.extension import Library
+from setuptools import Command
+
+try:
+    # Python 2.7 or >=3.2
+    from sysconfig import get_path, get_python_version
+
+    def _get_purelib():
+        return get_path("purelib")
+except ImportError:
+    from distutils.sysconfig import get_python_lib, get_python_version
+
+    def _get_purelib():
+        return get_python_lib(False)
+
+
+def strip_module(filename):
+    if '.' in filename:
+        filename = os.path.splitext(filename)[0]
+    if filename.endswith('module'):
+        filename = filename[:-6]
+    return filename
+
+
+def sorted_walk(dir):
+    """Do os.walk in a reproducible way,
+    independent of indeterministic filesystem readdir order
+    """
+    for base, dirs, files in os.walk(dir):
+        dirs.sort()
+        files.sort()
+        yield base, dirs, files
+
+
+def write_stub(resource, pyfile):
+    _stub_template = textwrap.dedent("""
+        def __bootstrap__():
+            global __bootstrap__, __loader__, __file__
+            import sys, pkg_resources, imp
+            __file__ = pkg_resources.resource_filename(__name__, %r)
+            __loader__ = None; del __bootstrap__, __loader__
+            imp.load_dynamic(__name__,__file__)
+        __bootstrap__()
+        """).lstrip()
+    with open(pyfile, 'w') as f:
+        f.write(_stub_template % resource)
+
+
+class bdist_egg(Command):
+    description = "create an \"egg\" distribution"
+
+    user_options = [
+        ('bdist-dir=', 'b',
+         "temporary directory for creating the distribution"),
+        ('plat-name=', 'p', "platform name to embed in generated filenames "
+                            "(default: %s)" % get_build_platform()),
+        ('exclude-source-files', None,
+         "remove all .py files from the generated egg"),
+        ('keep-temp', 'k',
+         "keep the pseudo-installation tree around after " +
+         "creating the distribution archive"),
+        ('dist-dir=', 'd',
+         "directory to put final built distributions in"),
+        ('skip-build', None,
+         "skip rebuilding everything (for testing/debugging)"),
+    ]
+
+    boolean_options = [
+        'keep-temp', 'skip-build', 'exclude-source-files'
+    ]
+
+    def initialize_options(self):
+        self.bdist_dir = None
+        self.plat_name = None
+        self.keep_temp = 0
+        self.dist_dir = None
+        self.skip_build = 0
+        self.egg_output = None
+        self.exclude_source_files = None
+
+    def finalize_options(self):
+        ei_cmd = self.ei_cmd = self.get_finalized_command("egg_info")
+        self.egg_info = ei_cmd.egg_info
+
+        if self.bdist_dir is None:
+            bdist_base = self.get_finalized_command('bdist').bdist_base
+            self.bdist_dir = os.path.join(bdist_base, 'egg')
+
+        if self.plat_name is None:
+            self.plat_name = get_build_platform()
+
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+        if self.egg_output is None:
+
+            # Compute filename of the output egg
+            basename = Distribution(
+                None, None, ei_cmd.egg_name, ei_cmd.egg_version,
+                get_python_version(),
+                self.distribution.has_ext_modules() and self.plat_name
+            ).egg_name()
+
+            self.egg_output = os.path.join(self.dist_dir, basename + '.egg')
+
+    def do_install_data(self):
+        # Hack for packages that install data to install's --install-lib
+        self.get_finalized_command('install').install_lib = self.bdist_dir
+
+        site_packages = os.path.normcase(os.path.realpath(_get_purelib()))
+        old, self.distribution.data_files = self.distribution.data_files, []
+
+        for item in old:
+            if isinstance(item, tuple) and len(item) == 2:
+                if os.path.isabs(item[0]):
+                    realpath = os.path.realpath(item[0])
+                    normalized = os.path.normcase(realpath)
+                    if normalized == site_packages or normalized.startswith(
+                        site_packages + os.sep
+                    ):
+                        item = realpath[len(site_packages) + 1:], item[1]
+                        # XXX else: raise ???
+            self.distribution.data_files.append(item)
+
+        try:
+            log.info("installing package data to %s", self.bdist_dir)
+            self.call_command('install_data', force=0, root=None)
+        finally:
+            self.distribution.data_files = old
+
+    def get_outputs(self):
+        return [self.egg_output]
+
+    def call_command(self, cmdname, **kw):
+        """Invoke reinitialized command `cmdname` with keyword args"""
+        for dirname in INSTALL_DIRECTORY_ATTRS:
+            kw.setdefault(dirname, self.bdist_dir)
+        kw.setdefault('skip_build', self.skip_build)
+        kw.setdefault('dry_run', self.dry_run)
+        cmd = self.reinitialize_command(cmdname, **kw)
+        self.run_command(cmdname)
+        return cmd
+
+    def run(self):
+        # Generate metadata first
+        self.run_command("egg_info")
+        # We run install_lib before install_data, because some data hacks
+        # pull their data path from the install_lib command.
+        log.info("installing library code to %s", self.bdist_dir)
+        instcmd = self.get_finalized_command('install')
+        old_root = instcmd.root
+        instcmd.root = None
+        if self.distribution.has_c_libraries() and not self.skip_build:
+            self.run_command('build_clib')
+        cmd = self.call_command('install_lib', warn_dir=0)
+        instcmd.root = old_root
+
+        all_outputs, ext_outputs = self.get_ext_outputs()
+        self.stubs = []
+        to_compile = []
+        for (p, ext_name) in enumerate(ext_outputs):
+            filename, ext = os.path.splitext(ext_name)
+            pyfile = os.path.join(self.bdist_dir, strip_module(filename) +
+                                  '.py')
+            self.stubs.append(pyfile)
+            log.info("creating stub loader for %s", ext_name)
+            if not self.dry_run:
+                write_stub(os.path.basename(ext_name), pyfile)
+            to_compile.append(pyfile)
+            ext_outputs[p] = ext_name.replace(os.sep, '/')
+
+        if to_compile:
+            cmd.byte_compile(to_compile)
+        if self.distribution.data_files:
+            self.do_install_data()
+
+        # Make the EGG-INFO directory
+        archive_root = self.bdist_dir
+        egg_info = os.path.join(archive_root, 'EGG-INFO')
+        self.mkpath(egg_info)
+        if self.distribution.scripts:
+            script_dir = os.path.join(egg_info, 'scripts')
+            log.info("installing scripts to %s", script_dir)
+            self.call_command('install_scripts', install_dir=script_dir,
+                              no_ep=1)
+
+        self.copy_metadata_to(egg_info)
+        native_libs = os.path.join(egg_info, "native_libs.txt")
+        if all_outputs:
+            log.info("writing %s", native_libs)
+            if not self.dry_run:
+                ensure_directory(native_libs)
+                libs_file = open(native_libs, 'wt')
+                libs_file.write('\n'.join(all_outputs))
+                libs_file.write('\n')
+                libs_file.close()
+        elif os.path.isfile(native_libs):
+            log.info("removing %s", native_libs)
+            if not self.dry_run:
+                os.unlink(native_libs)
+
+        write_safety_flag(
+            os.path.join(archive_root, 'EGG-INFO'), self.zip_safe()
+        )
+
+        if os.path.exists(os.path.join(self.egg_info, 'depends.txt')):
+            log.warn(
+                "WARNING: 'depends.txt' will not be used by setuptools 0.6!\n"
+                "Use the install_requires/extras_require setup() args instead."
+            )
+
+        if self.exclude_source_files:
+            self.zap_pyfiles()
+
+        # Make the archive
+        make_zipfile(self.egg_output, archive_root, verbose=self.verbose,
+                     dry_run=self.dry_run, mode=self.gen_header())
+        if not self.keep_temp:
+            remove_tree(self.bdist_dir, dry_run=self.dry_run)
+
+        # Add to 'Distribution.dist_files' so that the "upload" command works
+        getattr(self.distribution, 'dist_files', []).append(
+            ('bdist_egg', get_python_version(), self.egg_output))
+
+    def zap_pyfiles(self):
+        log.info("Removing .py files from temporary directory")
+        for base, dirs, files in walk_egg(self.bdist_dir):
+            for name in files:
+                path = os.path.join(base, name)
+
+                if name.endswith('.py'):
+                    log.debug("Deleting %s", path)
+                    os.unlink(path)
+
+                if base.endswith('__pycache__'):
+                    path_old = path
+
+                    pattern = r'(?P<name>.+)\.(?P<magic>[^.]+)\.pyc'
+                    m = re.match(pattern, name)
+                    path_new = os.path.join(
+                        base, os.pardir, m.group('name') + '.pyc')
+                    log.info(
+                        "Renaming file from [%s] to [%s]"
+                        % (path_old, path_new))
+                    try:
+                        os.remove(path_new)
+                    except OSError:
+                        pass
+                    os.rename(path_old, path_new)
+
+    def zip_safe(self):
+        safe = getattr(self.distribution, 'zip_safe', None)
+        if safe is not None:
+            return safe
+        log.warn("zip_safe flag not set; analyzing archive contents...")
+        return analyze_egg(self.bdist_dir, self.stubs)
+
+    def gen_header(self):
+        epm = EntryPoint.parse_map(self.distribution.entry_points or '')
+        ep = epm.get('setuptools.installation', {}).get('eggsecutable')
+        if ep is None:
+            return 'w'  # not an eggsecutable, do it the usual way.
+
+        if not ep.attrs or ep.extras:
+            raise DistutilsSetupError(
+                "eggsecutable entry point (%r) cannot have 'extras' "
+                "or refer to a module" % (ep,)
+            )
+
+        pyver = '{}.{}'.format(*sys.version_info)
+        pkg = ep.module_name
+        full = '.'.join(ep.attrs)
+        base = ep.attrs[0]
+        basename = os.path.basename(self.egg_output)
+
+        header = (
+            "#!/bin/sh\n"
+            'if [ `basename $0` = "%(basename)s" ]\n'
+            'then exec python%(pyver)s -c "'
+            "import sys, os; sys.path.insert(0, os.path.abspath('$0')); "
+            "from %(pkg)s import %(base)s; sys.exit(%(full)s())"
+            '" "$@"\n'
+            'else\n'
+            '  echo $0 is not the correct name for this egg file.\n'
+            '  echo Please rename it back to %(basename)s and try again.\n'
+            '  exec false\n'
+            'fi\n'
+        ) % locals()
+
+        if not self.dry_run:
+            mkpath(os.path.dirname(self.egg_output), dry_run=self.dry_run)
+            f = open(self.egg_output, 'w')
+            f.write(header)
+            f.close()
+        return 'a'
+
+    def copy_metadata_to(self, target_dir):
+        "Copy metadata (egg info) to the target_dir"
+        # normalize the path (so that a forward-slash in egg_info will
+        # match using startswith below)
+        norm_egg_info = os.path.normpath(self.egg_info)
+        prefix = os.path.join(norm_egg_info, '')
+        for path in self.ei_cmd.filelist.files:
+            if path.startswith(prefix):
+                target = os.path.join(target_dir, path[len(prefix):])
+                ensure_directory(target)
+                self.copy_file(path, target)
+
+    def get_ext_outputs(self):
+        """Get a list of relative paths to C extensions in the output distro"""
+
+        all_outputs = []
+        ext_outputs = []
+
+        paths = {self.bdist_dir: ''}
+        for base, dirs, files in sorted_walk(self.bdist_dir):
+            for filename in files:
+                if os.path.splitext(filename)[1].lower() in NATIVE_EXTENSIONS:
+                    all_outputs.append(paths[base] + filename)
+            for filename in dirs:
+                paths[os.path.join(base, filename)] = (paths[base] +
+                                                       filename + '/')
+
+        if self.distribution.has_ext_modules():
+            build_cmd = self.get_finalized_command('build_ext')
+            for ext in build_cmd.extensions:
+                if isinstance(ext, Library):
+                    continue
+                fullname = build_cmd.get_ext_fullname(ext.name)
+                filename = build_cmd.get_ext_filename(fullname)
+                if not os.path.basename(filename).startswith('dl-'):
+                    if os.path.exists(os.path.join(self.bdist_dir, filename)):
+                        ext_outputs.append(filename)
+
+        return all_outputs, ext_outputs
+
+
+NATIVE_EXTENSIONS = dict.fromkeys('.dll .so .dylib .pyd'.split())
+
+
+def walk_egg(egg_dir):
+    """Walk an unpacked egg's contents, skipping the metadata directory"""
+    walker = sorted_walk(egg_dir)
+    base, dirs, files = next(walker)
+    if 'EGG-INFO' in dirs:
+        dirs.remove('EGG-INFO')
+    yield base, dirs, files
+    for bdf in walker:
+        yield bdf
+
+
+def analyze_egg(egg_dir, stubs):
+    # check for existing flag in EGG-INFO
+    for flag, fn in safety_flags.items():
+        if os.path.exists(os.path.join(egg_dir, 'EGG-INFO', fn)):
+            return flag
+    if not can_scan():
+        return False
+    safe = True
+    for base, dirs, files in walk_egg(egg_dir):
+        for name in files:
+            if name.endswith('.py') or name.endswith('.pyw'):
+                continue
+            elif name.endswith('.pyc') or name.endswith('.pyo'):
+                # always scan, even if we already know we're not safe
+                safe = scan_module(egg_dir, base, name, stubs) and safe
+    return safe
+
+
+def write_safety_flag(egg_dir, safe):
+    # Write or remove zip safety flag file(s)
+    for flag, fn in safety_flags.items():
+        fn = os.path.join(egg_dir, fn)
+        if os.path.exists(fn):
+            if safe is None or bool(safe) != flag:
+                os.unlink(fn)
+        elif safe is not None and bool(safe) == flag:
+            f = open(fn, 'wt')
+            f.write('\n')
+            f.close()
+
+
+safety_flags = {
+    True: 'zip-safe',
+    False: 'not-zip-safe',
+}
+
+
+def scan_module(egg_dir, base, name, stubs):
+    """Check whether module possibly uses unsafe-for-zipfile stuff"""
+
+    filename = os.path.join(base, name)
+    if filename[:-1] in stubs:
+        return True  # Extension module
+    pkg = base[len(egg_dir) + 1:].replace(os.sep, '.')
+    module = pkg + (pkg and '.' or '') + os.path.splitext(name)[0]
+    if six.PY2:
+        skip = 8  # skip magic & date
+    elif sys.version_info < (3, 7):
+        skip = 12  # skip magic & date & file size
+    else:
+        skip = 16  # skip magic & reserved? & date & file size
+    f = open(filename, 'rb')
+    f.read(skip)
+    code = marshal.load(f)
+    f.close()
+    safe = True
+    symbols = dict.fromkeys(iter_symbols(code))
+    for bad in ['__file__', '__path__']:
+        if bad in symbols:
+            log.warn("%s: module references %s", module, bad)
+            safe = False
+    if 'inspect' in symbols:
+        for bad in [
+            'getsource', 'getabsfile', 'getsourcefile', 'getfile'
+            'getsourcelines', 'findsource', 'getcomments', 'getframeinfo',
+            'getinnerframes', 'getouterframes', 'stack', 'trace'
+        ]:
+            if bad in symbols:
+                log.warn("%s: module MAY be using inspect.%s", module, bad)
+                safe = False
+    return safe
+
+
+def iter_symbols(code):
+    """Yield names and strings used by `code` and its nested code objects"""
+    for name in code.co_names:
+        yield name
+    for const in code.co_consts:
+        if isinstance(const, six.string_types):
+            yield const
+        elif isinstance(const, CodeType):
+            for name in iter_symbols(const):
+                yield name
+
+
+def can_scan():
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        # CPython, PyPy, etc.
+        return True
+    log.warn("Unable to analyze compiled code on this platform.")
+    log.warn("Please ask the author to include a 'zip_safe'"
+             " setting (either True or False) in the package's setup.py")
+
+
+# Attribute names of options for commands that might need to be convinced to
+# install to the egg build directory
+
+INSTALL_DIRECTORY_ATTRS = [
+    'install_lib', 'install_dir', 'install_data', 'install_base'
+]
+
+
+def make_zipfile(zip_filename, base_dir, verbose=0, dry_run=0, compress=True,
+                 mode='w'):
+    """Create a zip file from all the files under 'base_dir'.  The output
+    zip file will be named 'base_dir' + ".zip".  Uses either the "zipfile"
+    Python module (if available) or the InfoZIP "zip" utility (if installed
+    and found on the default search path).  If neither tool is available,
+    raises DistutilsExecError.  Returns the name of the output zip file.
+    """
+    import zipfile
+
+    mkpath(os.path.dirname(zip_filename), dry_run=dry_run)
+    log.info("creating '%s' and adding '%s' to it", zip_filename, base_dir)
+
+    def visit(z, dirname, names):
+        for name in names:
+            path = os.path.normpath(os.path.join(dirname, name))
+            if os.path.isfile(path):
+                p = path[len(base_dir) + 1:]
+                if not dry_run:
+                    z.write(path, p)
+                log.debug("adding '%s'", p)
+
+    compression = zipfile.ZIP_DEFLATED if compress else zipfile.ZIP_STORED
+    if not dry_run:
+        z = zipfile.ZipFile(zip_filename, mode, compression=compression)
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(z, dirname, files)
+        z.close()
+    else:
+        for dirname, dirs, files in sorted_walk(base_dir):
+            visit(None, dirname, files)
+    return zip_filename
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/bdist_rpm.py b/venv/lib/python3.9/site-packages/setuptools/command/bdist_rpm.py
new file mode 100644
index 0000000..7073092
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/bdist_rpm.py
@@ -0,0 +1,43 @@
+import distutils.command.bdist_rpm as orig
+
+
+class bdist_rpm(orig.bdist_rpm):
+    """
+    Override the default bdist_rpm behavior to do the following:
+
+    1. Run egg_info to ensure the name and version are properly calculated.
+    2. Always run 'install' using --single-version-externally-managed to
+       disable eggs in RPM distributions.
+    3. Replace dash with underscore in the version numbers for better RPM
+       compatibility.
+    """
+
+    def run(self):
+        # ensure distro name is up-to-date
+        self.run_command('egg_info')
+
+        orig.bdist_rpm.run(self)
+
+    def _make_spec_file(self):
+        version = self.distribution.get_version()
+        rpmversion = version.replace('-', '_')
+        spec = orig.bdist_rpm._make_spec_file(self)
+        line23 = '%define version ' + version
+        line24 = '%define version ' + rpmversion
+        spec = [
+            line.replace(
+                "Source0: %{name}-%{version}.tar",
+                "Source0: %{name}-%{unmangled_version}.tar"
+            ).replace(
+                "setup.py install ",
+                "setup.py install --single-version-externally-managed "
+            ).replace(
+                "%setup",
+                "%setup -n %{name}-%{unmangled_version}"
+            ).replace(line23, line24)
+            for line in spec
+        ]
+        insert_loc = spec.index(line24) + 1
+        unmangled_version = "%define unmangled_version " + version
+        spec.insert(insert_loc, unmangled_version)
+        return spec
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/bdist_wininst.py b/venv/lib/python3.9/site-packages/setuptools/command/bdist_wininst.py
new file mode 100644
index 0000000..073de97
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/bdist_wininst.py
@@ -0,0 +1,21 @@
+import distutils.command.bdist_wininst as orig
+
+
+class bdist_wininst(orig.bdist_wininst):
+    def reinitialize_command(self, command, reinit_subcommands=0):
+        """
+        Supplement reinitialize_command to work around
+        http://bugs.python.org/issue20819
+        """
+        cmd = self.distribution.reinitialize_command(
+            command, reinit_subcommands)
+        if command in ('install', 'install_lib'):
+            cmd.install_lib = None
+        return cmd
+
+    def run(self):
+        self._is_running = True
+        try:
+            orig.bdist_wininst.run(self)
+        finally:
+            self._is_running = False
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/build_clib.py b/venv/lib/python3.9/site-packages/setuptools/command/build_clib.py
new file mode 100644
index 0000000..09caff6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/build_clib.py
@@ -0,0 +1,98 @@
+import distutils.command.build_clib as orig
+from distutils.errors import DistutilsSetupError
+from distutils import log
+from setuptools.dep_util import newer_pairwise_group
+
+
+class build_clib(orig.build_clib):
+    """
+    Override the default build_clib behaviour to do the following:
+
+    1. Implement a rudimentary timestamp-based dependency system
+       so 'compile()' doesn't run every time.
+    2. Add more keys to the 'build_info' dictionary:
+        * obj_deps - specify dependencies for each object compiled.
+                     this should be a dictionary mapping a key
+                     with the source filename to a list of
+                     dependencies. Use an empty string for global
+                     dependencies.
+        * cflags   - specify a list of additional flags to pass to
+                     the compiler.
+    """
+
+    def build_libraries(self, libraries):
+        for (lib_name, build_info) in libraries:
+            sources = build_info.get('sources')
+            if sources is None or not isinstance(sources, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'sources' must be present and must be "
+                       "a list of source filenames" % lib_name)
+            sources = list(sources)
+
+            log.info("building '%s' library", lib_name)
+
+            # Make sure everything is the correct type.
+            # obj_deps should be a dictionary of keys as sources
+            # and a list/tuple of files that are its dependencies.
+            obj_deps = build_info.get('obj_deps', dict())
+            if not isinstance(obj_deps, dict):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+            dependencies = []
+
+            # Get the global dependencies that are specified by the '' key.
+            # These will go into every source's dependency list.
+            global_deps = obj_deps.get('', list())
+            if not isinstance(global_deps, (list, tuple)):
+                raise DistutilsSetupError(
+                       "in 'libraries' option (library '%s'), "
+                       "'obj_deps' must be a dictionary of "
+                       "type 'source: list'" % lib_name)
+
+            # Build the list to be used by newer_pairwise_group
+            # each source will be auto-added to its dependencies.
+            for source in sources:
+                src_deps = [source]
+                src_deps.extend(global_deps)
+                extra_deps = obj_deps.get(source, list())
+                if not isinstance(extra_deps, (list, tuple)):
+                    raise DistutilsSetupError(
+                           "in 'libraries' option (library '%s'), "
+                           "'obj_deps' must be a dictionary of "
+                           "type 'source: list'" % lib_name)
+                src_deps.extend(extra_deps)
+                dependencies.append(src_deps)
+
+            expected_objects = self.compiler.object_filenames(
+                    sources,
+                    output_dir=self.build_temp
+                    )
+
+            if newer_pairwise_group(dependencies, expected_objects) != ([], []):
+                # First, compile the source code to object files in the library
+                # directory.  (This should probably change to putting object
+                # files in a temporary build directory.)
+                macros = build_info.get('macros')
+                include_dirs = build_info.get('include_dirs')
+                cflags = build_info.get('cflags')
+                objects = self.compiler.compile(
+                        sources,
+                        output_dir=self.build_temp,
+                        macros=macros,
+                        include_dirs=include_dirs,
+                        extra_postargs=cflags,
+                        debug=self.debug
+                        )
+
+            # Now "link" the object files together into a static library.
+            # (On Unix at least, this isn't really linking -- it just
+            # builds an archive.  Whatever.)
+            self.compiler.create_static_lib(
+                    expected_objects,
+                    lib_name,
+                    output_dir=self.build_clib,
+                    debug=self.debug
+                    )
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/build_ext.py b/venv/lib/python3.9/site-packages/setuptools/command/build_ext.py
new file mode 100644
index 0000000..1b51e04
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/build_ext.py
@@ -0,0 +1,327 @@
+import os
+import sys
+import itertools
+from distutils.command.build_ext import build_ext as _du_build_ext
+from distutils.file_util import copy_file
+from distutils.ccompiler import new_compiler
+from distutils.sysconfig import customize_compiler, get_config_var
+from distutils.errors import DistutilsError
+from distutils import log
+
+from setuptools.extension import Library
+from setuptools.extern import six
+
+if six.PY2:
+    import imp
+
+    EXTENSION_SUFFIXES = [s for s, _, tp in imp.get_suffixes() if tp == imp.C_EXTENSION]
+else:
+    from importlib.machinery import EXTENSION_SUFFIXES
+
+try:
+    # Attempt to use Cython for building extensions, if available
+    from Cython.Distutils.build_ext import build_ext as _build_ext
+    # Additionally, assert that the compiler module will load
+    # also. Ref #1229.
+    __import__('Cython.Compiler.Main')
+except ImportError:
+    _build_ext = _du_build_ext
+
+# make sure _config_vars is initialized
+get_config_var("LDSHARED")
+from distutils.sysconfig import _config_vars as _CONFIG_VARS
+
+
+def _customize_compiler_for_shlib(compiler):
+    if sys.platform == "darwin":
+        # building .dylib requires additional compiler flags on OSX; here we
+        # temporarily substitute the pyconfig.h variables so that distutils'
+        # 'customize_compiler' uses them before we build the shared libraries.
+        tmp = _CONFIG_VARS.copy()
+        try:
+            # XXX Help!  I don't have any idea whether these are right...
+            _CONFIG_VARS['LDSHARED'] = (
+                "gcc -Wl,-x -dynamiclib -undefined dynamic_lookup")
+            _CONFIG_VARS['CCSHARED'] = " -dynamiclib"
+            _CONFIG_VARS['SO'] = ".dylib"
+            customize_compiler(compiler)
+        finally:
+            _CONFIG_VARS.clear()
+            _CONFIG_VARS.update(tmp)
+    else:
+        customize_compiler(compiler)
+
+
+have_rtld = False
+use_stubs = False
+libtype = 'shared'
+
+if sys.platform == "darwin":
+    use_stubs = True
+elif os.name != 'nt':
+    try:
+        import dl
+        use_stubs = have_rtld = hasattr(dl, 'RTLD_NOW')
+    except ImportError:
+        pass
+
+if_dl = lambda s: s if have_rtld else ''
+
+
+def get_abi3_suffix():
+    """Return the file extension for an abi3-compliant Extension()"""
+    for suffix in EXTENSION_SUFFIXES:
+        if '.abi3' in suffix:  # Unix
+            return suffix
+        elif suffix == '.pyd':  # Windows
+            return suffix
+
+
+class build_ext(_build_ext):
+    def run(self):
+        """Build extensions in build directory, then copy if --inplace"""
+        old_inplace, self.inplace = self.inplace, 0
+        _build_ext.run(self)
+        self.inplace = old_inplace
+        if old_inplace:
+            self.copy_extensions_to_source()
+
+    def copy_extensions_to_source(self):
+        build_py = self.get_finalized_command('build_py')
+        for ext in self.extensions:
+            fullname = self.get_ext_fullname(ext.name)
+            filename = self.get_ext_filename(fullname)
+            modpath = fullname.split('.')
+            package = '.'.join(modpath[:-1])
+            package_dir = build_py.get_package_dir(package)
+            dest_filename = os.path.join(package_dir,
+                                         os.path.basename(filename))
+            src_filename = os.path.join(self.build_lib, filename)
+
+            # Always copy, even if source is older than destination, to ensure
+            # that the right extensions for the current Python/platform are
+            # used.
+            copy_file(
+                src_filename, dest_filename, verbose=self.verbose,
+                dry_run=self.dry_run
+            )
+            if ext._needs_stub:
+                self.write_stub(package_dir or os.curdir, ext, True)
+
+    def get_ext_filename(self, fullname):
+        filename = _build_ext.get_ext_filename(self, fullname)
+        if fullname in self.ext_map:
+            ext = self.ext_map[fullname]
+            use_abi3 = (
+                not six.PY2
+                and getattr(ext, 'py_limited_api')
+                and get_abi3_suffix()
+            )
+            if use_abi3:
+                so_ext = get_config_var('EXT_SUFFIX')
+                filename = filename[:-len(so_ext)]
+                filename = filename + get_abi3_suffix()
+            if isinstance(ext, Library):
+                fn, ext = os.path.splitext(filename)
+                return self.shlib_compiler.library_filename(fn, libtype)
+            elif use_stubs and ext._links_to_dynamic:
+                d, fn = os.path.split(filename)
+                return os.path.join(d, 'dl-' + fn)
+        return filename
+
+    def initialize_options(self):
+        _build_ext.initialize_options(self)
+        self.shlib_compiler = None
+        self.shlibs = []
+        self.ext_map = {}
+
+    def finalize_options(self):
+        _build_ext.finalize_options(self)
+        self.extensions = self.extensions or []
+        self.check_extensions_list(self.extensions)
+        self.shlibs = [ext for ext in self.extensions
+                       if isinstance(ext, Library)]
+        if self.shlibs:
+            self.setup_shlib_compiler()
+        for ext in self.extensions:
+            ext._full_name = self.get_ext_fullname(ext.name)
+        for ext in self.extensions:
+            fullname = ext._full_name
+            self.ext_map[fullname] = ext
+
+            # distutils 3.1 will also ask for module names
+            # XXX what to do with conflicts?
+            self.ext_map[fullname.split('.')[-1]] = ext
+
+            ltd = self.shlibs and self.links_to_dynamic(ext) or False
+            ns = ltd and use_stubs and not isinstance(ext, Library)
+            ext._links_to_dynamic = ltd
+            ext._needs_stub = ns
+            filename = ext._file_name = self.get_ext_filename(fullname)
+            libdir = os.path.dirname(os.path.join(self.build_lib, filename))
+            if ltd and libdir not in ext.library_dirs:
+                ext.library_dirs.append(libdir)
+            if ltd and use_stubs and os.curdir not in ext.runtime_library_dirs:
+                ext.runtime_library_dirs.append(os.curdir)
+
+    def setup_shlib_compiler(self):
+        compiler = self.shlib_compiler = new_compiler(
+            compiler=self.compiler, dry_run=self.dry_run, force=self.force
+        )
+        _customize_compiler_for_shlib(compiler)
+
+        if self.include_dirs is not None:
+            compiler.set_include_dirs(self.include_dirs)
+        if self.define is not None:
+            # 'define' option is a list of (name,value) tuples
+            for (name, value) in self.define:
+                compiler.define_macro(name, value)
+        if self.undef is not None:
+            for macro in self.undef:
+                compiler.undefine_macro(macro)
+        if self.libraries is not None:
+            compiler.set_libraries(self.libraries)
+        if self.library_dirs is not None:
+            compiler.set_library_dirs(self.library_dirs)
+        if self.rpath is not None:
+            compiler.set_runtime_library_dirs(self.rpath)
+        if self.link_objects is not None:
+            compiler.set_link_objects(self.link_objects)
+
+        # hack so distutils' build_extension() builds a library instead
+        compiler.link_shared_object = link_shared_object.__get__(compiler)
+
+    def get_export_symbols(self, ext):
+        if isinstance(ext, Library):
+            return ext.export_symbols
+        return _build_ext.get_export_symbols(self, ext)
+
+    def build_extension(self, ext):
+        ext._convert_pyx_sources_to_lang()
+        _compiler = self.compiler
+        try:
+            if isinstance(ext, Library):
+                self.compiler = self.shlib_compiler
+            _build_ext.build_extension(self, ext)
+            if ext._needs_stub:
+                cmd = self.get_finalized_command('build_py').build_lib
+                self.write_stub(cmd, ext)
+        finally:
+            self.compiler = _compiler
+
+    def links_to_dynamic(self, ext):
+        """Return true if 'ext' links to a dynamic lib in the same package"""
+        # XXX this should check to ensure the lib is actually being built
+        # XXX as dynamic, and not just using a locally-found version or a
+        # XXX static-compiled version
+        libnames = dict.fromkeys([lib._full_name for lib in self.shlibs])
+        pkg = '.'.join(ext._full_name.split('.')[:-1] + [''])
+        return any(pkg + libname in libnames for libname in ext.libraries)
+
+    def get_outputs(self):
+        return _build_ext.get_outputs(self) + self.__get_stubs_outputs()
+
+    def __get_stubs_outputs(self):
+        # assemble the base name for each extension that needs a stub
+        ns_ext_bases = (
+            os.path.join(self.build_lib, *ext._full_name.split('.'))
+            for ext in self.extensions
+            if ext._needs_stub
+        )
+        # pair each base with the extension
+        pairs = itertools.product(ns_ext_bases, self.__get_output_extensions())
+        return list(base + fnext for base, fnext in pairs)
+
+    def __get_output_extensions(self):
+        yield '.py'
+        yield '.pyc'
+        if self.get_finalized_command('build_py').optimize:
+            yield '.pyo'
+
+    def write_stub(self, output_dir, ext, compile=False):
+        log.info("writing stub loader for %s to %s", ext._full_name,
+                 output_dir)
+        stub_file = (os.path.join(output_dir, *ext._full_name.split('.')) +
+                     '.py')
+        if compile and os.path.exists(stub_file):
+            raise DistutilsError(stub_file + " already exists! Please delete.")
+        if not self.dry_run:
+            f = open(stub_file, 'w')
+            f.write(
+                '\n'.join([
+                    "def __bootstrap__():",
+                    "   global __bootstrap__, __file__, __loader__",
+                    "   import sys, os, pkg_resources, imp" + if_dl(", dl"),
+                    "   __file__ = pkg_resources.resource_filename"
+                    "(__name__,%r)"
+                    % os.path.basename(ext._file_name),
+                    "   del __bootstrap__",
+                    "   if '__loader__' in globals():",
+                    "       del __loader__",
+                    if_dl("   old_flags = sys.getdlopenflags()"),
+                    "   old_dir = os.getcwd()",
+                    "   try:",
+                    "     os.chdir(os.path.dirname(__file__))",
+                    if_dl("     sys.setdlopenflags(dl.RTLD_NOW)"),
+                    "     imp.load_dynamic(__name__,__file__)",
+                    "   finally:",
+                    if_dl("     sys.setdlopenflags(old_flags)"),
+                    "     os.chdir(old_dir)",
+                    "__bootstrap__()",
+                    ""  # terminal \n
+                ])
+            )
+            f.close()
+        if compile:
+            from distutils.util import byte_compile
+
+            byte_compile([stub_file], optimize=0,
+                         force=True, dry_run=self.dry_run)
+            optimize = self.get_finalized_command('install_lib').optimize
+            if optimize > 0:
+                byte_compile([stub_file], optimize=optimize,
+                             force=True, dry_run=self.dry_run)
+            if os.path.exists(stub_file) and not self.dry_run:
+                os.unlink(stub_file)
+
+
+if use_stubs or os.name == 'nt':
+    # Build shared libraries
+    #
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        self.link(
+            self.SHARED_LIBRARY, objects, output_libname,
+            output_dir, libraries, library_dirs, runtime_library_dirs,
+            export_symbols, debug, extra_preargs, extra_postargs,
+            build_temp, target_lang
+        )
+else:
+    # Build static libraries everywhere else
+    libtype = 'static'
+
+    def link_shared_object(
+            self, objects, output_libname, output_dir=None, libraries=None,
+            library_dirs=None, runtime_library_dirs=None, export_symbols=None,
+            debug=0, extra_preargs=None, extra_postargs=None, build_temp=None,
+            target_lang=None):
+        # XXX we need to either disallow these attrs on Library instances,
+        # or warn/abort here if set, or something...
+        # libraries=None, library_dirs=None, runtime_library_dirs=None,
+        # export_symbols=None, extra_preargs=None, extra_postargs=None,
+        # build_temp=None
+
+        assert output_dir is None  # distutils build_ext doesn't pass this
+        output_dir, filename = os.path.split(output_libname)
+        basename, ext = os.path.splitext(filename)
+        if self.library_filename("x").startswith('lib'):
+            # strip 'lib' prefix; this is kludgy if some platform uses
+            # a different prefix
+            basename = basename[3:]
+
+        self.create_static_lib(
+            objects, basename, output_dir, debug, target_lang
+        )
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/build_py.py b/venv/lib/python3.9/site-packages/setuptools/command/build_py.py
new file mode 100644
index 0000000..b0314fd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/build_py.py
@@ -0,0 +1,270 @@
+from glob import glob
+from distutils.util import convert_path
+import distutils.command.build_py as orig
+import os
+import fnmatch
+import textwrap
+import io
+import distutils.errors
+import itertools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+try:
+    from setuptools.lib2to3_ex import Mixin2to3
+except ImportError:
+
+    class Mixin2to3:
+        def run_2to3(self, files, doctests=True):
+            "do nothing"
+
+
+class build_py(orig.build_py, Mixin2to3):
+    """Enhanced 'build_py' command that includes data files with packages
+
+    The data files are specified via a 'package_data' argument to 'setup()'.
+    See 'setuptools.dist.Distribution' for more details.
+
+    Also, this version of the 'build_py' command allows you to specify both
+    'py_modules' and 'packages' in the same setup operation.
+    """
+
+    def finalize_options(self):
+        orig.build_py.finalize_options(self)
+        self.package_data = self.distribution.package_data
+        self.exclude_package_data = (self.distribution.exclude_package_data or
+                                     {})
+        if 'data_files' in self.__dict__:
+            del self.__dict__['data_files']
+        self.__updated_files = []
+        self.__doctests_2to3 = []
+
+    def run(self):
+        """Build modules, packages, and copy data files to build directory"""
+        if not self.py_modules and not self.packages:
+            return
+
+        if self.py_modules:
+            self.build_modules()
+
+        if self.packages:
+            self.build_packages()
+            self.build_package_data()
+
+        self.run_2to3(self.__updated_files, False)
+        self.run_2to3(self.__updated_files, True)
+        self.run_2to3(self.__doctests_2to3, True)
+
+        # Only compile actual .py files, using our base class' idea of what our
+        # output files are.
+        self.byte_compile(orig.build_py.get_outputs(self, include_bytecode=0))
+
+    def __getattr__(self, attr):
+        "lazily compute data files"
+        if attr == 'data_files':
+            self.data_files = self._get_data_files()
+            return self.data_files
+        return orig.build_py.__getattr__(self, attr)
+
+    def build_module(self, module, module_file, package):
+        if six.PY2 and isinstance(package, six.string_types):
+            # avoid errors on Python 2 when unicode is passed (#190)
+            package = package.split('.')
+        outfile, copied = orig.build_py.build_module(self, module, module_file,
+                                                     package)
+        if copied:
+            self.__updated_files.append(outfile)
+        return outfile, copied
+
+    def _get_data_files(self):
+        """Generate list of '(package,src_dir,build_dir,filenames)' tuples"""
+        self.analyze_manifest()
+        return list(map(self._get_pkg_data_files, self.packages or ()))
+
+    def _get_pkg_data_files(self, package):
+        # Locate package source directory
+        src_dir = self.get_package_dir(package)
+
+        # Compute package build directory
+        build_dir = os.path.join(*([self.build_lib] + package.split('.')))
+
+        # Strip directory from globbed filenames
+        filenames = [
+            os.path.relpath(file, src_dir)
+            for file in self.find_data_files(package, src_dir)
+        ]
+        return package, src_dir, build_dir, filenames
+
+    def find_data_files(self, package, src_dir):
+        """Return filenames for package's data files in 'src_dir'"""
+        patterns = self._get_platform_patterns(
+            self.package_data,
+            package,
+            src_dir,
+        )
+        globs_expanded = map(glob, patterns)
+        # flatten the expanded globs into an iterable of matches
+        globs_matches = itertools.chain.from_iterable(globs_expanded)
+        glob_files = filter(os.path.isfile, globs_matches)
+        files = itertools.chain(
+            self.manifest_files.get(package, []),
+            glob_files,
+        )
+        return self.exclude_data_files(package, src_dir, files)
+
+    def build_package_data(self):
+        """Copy data files into build directory"""
+        for package, src_dir, build_dir, filenames in self.data_files:
+            for filename in filenames:
+                target = os.path.join(build_dir, filename)
+                self.mkpath(os.path.dirname(target))
+                srcfile = os.path.join(src_dir, filename)
+                outf, copied = self.copy_file(srcfile, target)
+                srcfile = os.path.abspath(srcfile)
+                if (copied and
+                        srcfile in self.distribution.convert_2to3_doctests):
+                    self.__doctests_2to3.append(outf)
+
+    def analyze_manifest(self):
+        self.manifest_files = mf = {}
+        if not self.distribution.include_package_data:
+            return
+        src_dirs = {}
+        for package in self.packages or ():
+            # Locate package source directory
+            src_dirs[assert_relative(self.get_package_dir(package))] = package
+
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        for path in ei_cmd.filelist.files:
+            d, f = os.path.split(assert_relative(path))
+            prev = None
+            oldf = f
+            while d and d != prev and d not in src_dirs:
+                prev = d
+                d, df = os.path.split(d)
+                f = os.path.join(df, f)
+            if d in src_dirs:
+                if path.endswith('.py') and f == oldf:
+                    continue  # it's a module, not data
+                mf.setdefault(src_dirs[d], []).append(path)
+
+    def get_data_files(self):
+        pass  # Lazily compute data files in _get_data_files() function.
+
+    def check_package(self, package, package_dir):
+        """Check namespace packages' __init__ for declare_namespace"""
+        try:
+            return self.packages_checked[package]
+        except KeyError:
+            pass
+
+        init_py = orig.build_py.check_package(self, package, package_dir)
+        self.packages_checked[package] = init_py
+
+        if not init_py or not self.distribution.namespace_packages:
+            return init_py
+
+        for pkg in self.distribution.namespace_packages:
+            if pkg == package or pkg.startswith(package + '.'):
+                break
+        else:
+            return init_py
+
+        with io.open(init_py, 'rb') as f:
+            contents = f.read()
+        if b'declare_namespace' not in contents:
+            raise distutils.errors.DistutilsError(
+                "Namespace package problem: %s is a namespace package, but "
+                "its\n__init__.py does not call declare_namespace()! Please "
+                'fix it.\n(See the setuptools manual under '
+                '"Namespace Packages" for details.)\n"' % (package,)
+            )
+        return init_py
+
+    def initialize_options(self):
+        self.packages_checked = {}
+        orig.build_py.initialize_options(self)
+
+    def get_package_dir(self, package):
+        res = orig.build_py.get_package_dir(self, package)
+        if self.distribution.src_root is not None:
+            return os.path.join(self.distribution.src_root, res)
+        return res
+
+    def exclude_data_files(self, package, src_dir, files):
+        """Filter filenames for package's data files in 'src_dir'"""
+        files = list(files)
+        patterns = self._get_platform_patterns(
+            self.exclude_package_data,
+            package,
+            src_dir,
+        )
+        match_groups = (
+            fnmatch.filter(files, pattern)
+            for pattern in patterns
+        )
+        # flatten the groups of matches into an iterable of matches
+        matches = itertools.chain.from_iterable(match_groups)
+        bad = set(matches)
+        keepers = (
+            fn
+            for fn in files
+            if fn not in bad
+        )
+        # ditch dupes
+        return list(_unique_everseen(keepers))
+
+    @staticmethod
+    def _get_platform_patterns(spec, package, src_dir):
+        """
+        yield platform-specific path patterns (suitable for glob
+        or fn_match) from a glob-based spec (such as
+        self.package_data or self.exclude_package_data)
+        matching package in src_dir.
+        """
+        raw_patterns = itertools.chain(
+            spec.get('', []),
+            spec.get(package, []),
+        )
+        return (
+            # Each pattern has to be converted to a platform-specific path
+            os.path.join(src_dir, convert_path(pattern))
+            for pattern in raw_patterns
+        )
+
+
+# from Python docs
+def _unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def assert_relative(path):
+    if not os.path.isabs(path):
+        return path
+    from distutils.errors import DistutilsSetupError
+
+    msg = textwrap.dedent("""
+        Error: setup script specifies an absolute path:
+
+            %s
+
+        setup() arguments must *always* be /-separated paths relative to the
+        setup.py directory, *never* absolute paths.
+        """).lstrip() % path
+    raise DistutilsSetupError(msg)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/develop.py b/venv/lib/python3.9/site-packages/setuptools/command/develop.py
new file mode 100644
index 0000000..b561924
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/develop.py
@@ -0,0 +1,221 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsError, DistutilsOptionError
+import os
+import glob
+import io
+
+from setuptools.extern import six
+
+import pkg_resources
+from setuptools.command.easy_install import easy_install
+from setuptools import namespaces
+import setuptools
+
+__metaclass__ = type
+
+
+class develop(namespaces.DevelopInstaller, easy_install):
+    """Set up package for development"""
+
+    description = "install package in 'development mode'"
+
+    user_options = easy_install.user_options + [
+        ("uninstall", "u", "Uninstall this source package"),
+        ("egg-path=", None, "Set the path to be used in the .egg-link file"),
+    ]
+
+    boolean_options = easy_install.boolean_options + ['uninstall']
+
+    command_consumes_arguments = False  # override base
+
+    def run(self):
+        if self.uninstall:
+            self.multi_version = True
+            self.uninstall_link()
+            self.uninstall_namespaces()
+        else:
+            self.install_for_development()
+        self.warn_deprecated_options()
+
+    def initialize_options(self):
+        self.uninstall = None
+        self.egg_path = None
+        easy_install.initialize_options(self)
+        self.setup_path = None
+        self.always_copy_from = '.'  # always copy eggs installed in curdir
+
+    def finalize_options(self):
+        ei = self.get_finalized_command("egg_info")
+        if ei.broken_egg_info:
+            template = "Please rename %r to %r before using 'develop'"
+            args = ei.egg_info, ei.broken_egg_info
+            raise DistutilsError(template % args)
+        self.args = [ei.egg_name]
+
+        easy_install.finalize_options(self)
+        self.expand_basedirs()
+        self.expand_dirs()
+        # pick up setup-dir .egg files only: no .egg-info
+        self.package_index.scan(glob.glob('*.egg'))
+
+        egg_link_fn = ei.egg_name + '.egg-link'
+        self.egg_link = os.path.join(self.install_dir, egg_link_fn)
+        self.egg_base = ei.egg_base
+        if self.egg_path is None:
+            self.egg_path = os.path.abspath(ei.egg_base)
+
+        target = pkg_resources.normalize_path(self.egg_base)
+        egg_path = pkg_resources.normalize_path(
+            os.path.join(self.install_dir, self.egg_path))
+        if egg_path != target:
+            raise DistutilsOptionError(
+                "--egg-path must be a relative path from the install"
+                " directory to " + target
+            )
+
+        # Make a distribution for the package's source
+        self.dist = pkg_resources.Distribution(
+            target,
+            pkg_resources.PathMetadata(target, os.path.abspath(ei.egg_info)),
+            project_name=ei.egg_name
+        )
+
+        self.setup_path = self._resolve_setup_path(
+            self.egg_base,
+            self.install_dir,
+            self.egg_path,
+        )
+
+    @staticmethod
+    def _resolve_setup_path(egg_base, install_dir, egg_path):
+        """
+        Generate a path from egg_base back to '.' where the
+        setup script resides and ensure that path points to the
+        setup path from $install_dir/$egg_path.
+        """
+        path_to_setup = egg_base.replace(os.sep, '/').rstrip('/')
+        if path_to_setup != os.curdir:
+            path_to_setup = '../' * (path_to_setup.count('/') + 1)
+        resolved = pkg_resources.normalize_path(
+            os.path.join(install_dir, egg_path, path_to_setup)
+        )
+        if resolved != pkg_resources.normalize_path(os.curdir):
+            raise DistutilsOptionError(
+                "Can't get a consistent path to setup script from"
+                " installation directory", resolved,
+                pkg_resources.normalize_path(os.curdir))
+        return path_to_setup
+
+    def install_for_development(self):
+        if not six.PY2 and getattr(self.distribution, 'use_2to3', False):
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = pkg_resources.normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+
+            # Fixup egg-link and easy-install.pth
+            ei_cmd = self.get_finalized_command("egg_info")
+            self.egg_path = build_path
+            self.dist.location = build_path
+            # XXX
+            self.dist._provider = pkg_resources.PathMetadata(
+                build_path, ei_cmd.egg_info)
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        self.install_site_py()  # ensure that target dir is site-safe
+        if setuptools.bootstrap_install_from:
+            self.easy_install(setuptools.bootstrap_install_from)
+            setuptools.bootstrap_install_from = None
+
+        self.install_namespaces()
+
+        # create an .egg-link in the installation dir, pointing to our egg
+        log.info("Creating %s (link to %s)", self.egg_link, self.egg_base)
+        if not self.dry_run:
+            with open(self.egg_link, "w") as f:
+                f.write(self.egg_path + "\n" + self.setup_path)
+        # postprocess the installed distro, fixing up .pth, installing scripts,
+        # and handling requirements
+        self.process_distribution(None, self.dist, not self.no_deps)
+
+    def uninstall_link(self):
+        if os.path.exists(self.egg_link):
+            log.info("Removing %s (link to %s)", self.egg_link, self.egg_base)
+            egg_link_file = open(self.egg_link)
+            contents = [line.rstrip() for line in egg_link_file]
+            egg_link_file.close()
+            if contents not in ([self.egg_path],
+                                [self.egg_path, self.setup_path]):
+                log.warn("Link points to %s: uninstall aborted", contents)
+                return
+            if not self.dry_run:
+                os.unlink(self.egg_link)
+        if not self.dry_run:
+            self.update_pth(self.dist)  # remove any .pth link to us
+        if self.distribution.scripts:
+            # XXX should also check for entry point scripts!
+            log.warn("Note: you must uninstall or replace scripts manually!")
+
+    def install_egg_scripts(self, dist):
+        if dist is not self.dist:
+            # Installing a dependency, so fall back to normal behavior
+            return easy_install.install_egg_scripts(self, dist)
+
+        # create wrapper scripts in the script dir, pointing to dist.scripts
+
+        # new-style...
+        self.install_wrapper_scripts(dist)
+
+        # ...and old-style
+        for script_name in self.distribution.scripts or []:
+            script_path = os.path.abspath(convert_path(script_name))
+            script_name = os.path.basename(script_path)
+            with io.open(script_path) as strm:
+                script_text = strm.read()
+            self.install_script(dist, script_name, script_text, script_path)
+
+    def install_wrapper_scripts(self, dist):
+        dist = VersionlessRequirement(dist)
+        return easy_install.install_wrapper_scripts(self, dist)
+
+
+class VersionlessRequirement:
+    """
+    Adapt a pkg_resources.Distribution to simply return the project
+    name as the 'requirement' so that scripts will work across
+    multiple versions.
+
+    >>> from pkg_resources import Distribution
+    >>> dist = Distribution(project_name='foo', version='1.0')
+    >>> str(dist.as_requirement())
+    'foo==1.0'
+    >>> adapted_dist = VersionlessRequirement(dist)
+    >>> str(adapted_dist.as_requirement())
+    'foo'
+    """
+
+    def __init__(self, dist):
+        self.__dist = dist
+
+    def __getattr__(self, name):
+        return getattr(self.__dist, name)
+
+    def as_requirement(self):
+        return self.project_name
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/dist_info.py b/venv/lib/python3.9/site-packages/setuptools/command/dist_info.py
new file mode 100644
index 0000000..c45258f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/dist_info.py
@@ -0,0 +1,36 @@
+"""
+Create a dist_info directory
+As defined in the wheel specification
+"""
+
+import os
+
+from distutils.core import Command
+from distutils import log
+
+
+class dist_info(Command):
+
+    description = 'create a .dist-info directory'
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+    ]
+
+    def initialize_options(self):
+        self.egg_base = None
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        egg_info = self.get_finalized_command('egg_info')
+        egg_info.egg_base = self.egg_base
+        egg_info.finalize_options()
+        egg_info.run()
+        dist_info_dir = egg_info.egg_info[:-len('.egg-info')] + '.dist-info'
+        log.info("creating '{}'".format(os.path.abspath(dist_info_dir)))
+
+        bdist_wheel = self.get_finalized_command('bdist_wheel')
+        bdist_wheel.egg2dist(egg_info.egg_info, dist_info_dir)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/easy_install.py b/venv/lib/python3.9/site-packages/setuptools/command/easy_install.py
new file mode 100644
index 0000000..5a8dbe0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/easy_install.py
@@ -0,0 +1,2402 @@
+#!/usr/bin/env python
+"""
+Easy Install
+------------
+
+A tool for doing automatic download/extract/build of distutils-based Python
+packages.  For detailed documentation, see the accompanying EasyInstall.txt
+file, or visit the `EasyInstall home page`__.
+
+__ https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+"""
+
+from glob import glob
+from distutils.util import get_platform
+from distutils.util import convert_path, subst_vars
+from distutils.errors import (
+    DistutilsArgError, DistutilsOptionError,
+    DistutilsError, DistutilsPlatformError,
+)
+from distutils.command.install import INSTALL_SCHEMES, SCHEME_KEYS
+from distutils import log, dir_util
+from distutils.command.build_scripts import first_line_re
+from distutils.spawn import find_executable
+import sys
+import os
+import zipimport
+import shutil
+import tempfile
+import zipfile
+import re
+import stat
+import random
+import textwrap
+import warnings
+import site
+import struct
+import contextlib
+import subprocess
+import shlex
+import io
+
+
+from sysconfig import get_config_vars, get_path
+
+from setuptools import SetuptoolsDeprecationWarning
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import configparser, map
+
+from setuptools import Command
+from setuptools.sandbox import run_setup
+from setuptools.py27compat import rmtree_safe
+from setuptools.command import setopt
+from setuptools.archive_util import unpack_archive
+from setuptools.package_index import (
+    PackageIndex, parse_requirement_arg, URL_SCHEME,
+)
+from setuptools.command import bdist_egg, egg_info
+from setuptools.wheel import Wheel
+from pkg_resources import (
+    yield_lines, normalize_path, resource_string, ensure_directory,
+    get_distribution, find_distributions, Environment, Requirement,
+    Distribution, PathMetadata, EggMetadata, WorkingSet, DistributionNotFound,
+    VersionConflict, DEVELOP_DIST,
+)
+import pkg_resources.py31compat
+
+__metaclass__ = type
+
+# Turn on PEP440Warnings
+warnings.filterwarnings("default", category=pkg_resources.PEP440Warning)
+
+__all__ = [
+    'samefile', 'easy_install', 'PthDistributions', 'extract_wininst_cfg',
+    'main', 'get_exe_prefixes',
+]
+
+
+def is_64bit():
+    return struct.calcsize("P") == 8
+
+
+def samefile(p1, p2):
+    """
+    Determine if two paths reference the same file.
+
+    Augments os.path.samefile to work on Windows and
+    suppresses errors if the path doesn't exist.
+    """
+    both_exist = os.path.exists(p1) and os.path.exists(p2)
+    use_samefile = hasattr(os.path, 'samefile') and both_exist
+    if use_samefile:
+        return os.path.samefile(p1, p2)
+    norm_p1 = os.path.normpath(os.path.normcase(p1))
+    norm_p2 = os.path.normpath(os.path.normcase(p2))
+    return norm_p1 == norm_p2
+
+
+if six.PY2:
+
+    def _to_bytes(s):
+        return s
+
+    def isascii(s):
+        try:
+            six.text_type(s, 'ascii')
+            return True
+        except UnicodeError:
+            return False
+else:
+
+    def _to_bytes(s):
+        return s.encode('utf8')
+
+    def isascii(s):
+        try:
+            s.encode('ascii')
+            return True
+        except UnicodeError:
+            return False
+
+
+_one_liner = lambda text: textwrap.dedent(text).strip().replace('\n', '; ')
+
+
+class easy_install(Command):
+    """Manage a download/build/install process"""
+    description = "Find/get/install Python packages"
+    command_consumes_arguments = True
+
+    user_options = [
+        ('prefix=', None, "installation prefix"),
+        ("zip-ok", "z", "install package as a zipfile"),
+        ("multi-version", "m", "make apps have to require() a version"),
+        ("upgrade", "U", "force upgrade (searches PyPI for latest versions)"),
+        ("install-dir=", "d", "install package to DIR"),
+        ("script-dir=", "s", "install scripts to DIR"),
+        ("exclude-scripts", "x", "Don't install scripts"),
+        ("always-copy", "a", "Copy all needed packages to install dir"),
+        ("index-url=", "i", "base URL of Python Package Index"),
+        ("find-links=", "f", "additional URL(s) to search for packages"),
+        ("build-directory=", "b",
+         "download/extract/build in DIR; keep the results"),
+        ('optimize=', 'O',
+         "also compile with optimization: -O1 for \"python -O\", "
+         "-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
+        ('record=', None,
+         "filename in which to record list of installed files"),
+        ('always-unzip', 'Z', "don't install as a zipfile, no matter what"),
+        ('site-dirs=', 'S', "list of directories where .pth files work"),
+        ('editable', 'e', "Install specified packages in editable form"),
+        ('no-deps', 'N', "don't install dependencies"),
+        ('allow-hosts=', 'H', "pattern(s) that hostnames must match"),
+        ('local-snapshots-ok', 'l',
+         "allow building eggs from local checkouts"),
+        ('version', None, "print version information and exit"),
+        ('install-layout=', None, "installation layout to choose (known values: deb)"),
+        ('force-installation-into-system-dir', '0', "force installation into /usr"),
+        ('no-find-links', None,
+         "Don't load find-links defined in packages being installed")
+    ]
+    boolean_options = [
+        'zip-ok', 'multi-version', 'exclude-scripts', 'upgrade', 'always-copy',
+        'editable',
+        'no-deps', 'local-snapshots-ok', 'version', 'force-installation-into-system-dir'
+    ]
+
+    if site.ENABLE_USER_SITE:
+        help_msg = "install in user site-package '%s'" % site.USER_SITE
+        user_options.append(('user', None, help_msg))
+        boolean_options.append('user')
+
+    negative_opt = {'always-unzip': 'zip-ok'}
+    create_index = PackageIndex
+
+    def initialize_options(self):
+        # the --user option seems to be an opt-in one,
+        # so the default should be False.
+        self.user = 0
+        self.zip_ok = self.local_snapshots_ok = None
+        self.install_dir = self.script_dir = self.exclude_scripts = None
+        self.index_url = None
+        self.find_links = None
+        self.build_directory = None
+        self.args = None
+        self.optimize = self.record = None
+        self.upgrade = self.always_copy = self.multi_version = None
+        self.editable = self.no_deps = self.allow_hosts = None
+        self.root = self.prefix = self.no_report = None
+        self.version = None
+        self.install_purelib = None  # for pure module distributions
+        self.install_platlib = None  # non-pure (dists w/ extensions)
+        self.install_headers = None  # for C/C++ headers
+        self.install_lib = None  # set to either purelib or platlib
+        self.install_scripts = None
+        self.install_data = None
+        self.install_base = None
+        self.install_platbase = None
+        if site.ENABLE_USER_SITE:
+            self.install_userbase = site.USER_BASE
+            self.install_usersite = site.USER_SITE
+        else:
+            self.install_userbase = None
+            self.install_usersite = None
+        self.no_find_links = None
+
+        # Options not specifiable via command line
+        self.package_index = None
+        self.pth_file = self.always_copy_from = None
+        self.site_dirs = None
+        self.installed_projects = {}
+        self.sitepy_installed = False
+        # enable custom installation, known values: deb
+        self.install_layout = None
+        self.force_installation_into_system_dir = None
+        self.multiarch = None
+
+        # Always read easy_install options, even if we are subclassed, or have
+        # an independent instance created.  This ensures that defaults will
+        # always come from the standard configuration file(s)' "easy_install"
+        # section, even if this is a "develop" or "install" command, or some
+        # other embedding.
+        self._dry_run = None
+        self.verbose = self.distribution.verbose
+        self.distribution._set_command_options(
+            self, self.distribution.get_option_dict('easy_install')
+        )
+
+    def delete_blockers(self, blockers):
+        extant_blockers = (
+            filename for filename in blockers
+            if os.path.exists(filename) or os.path.islink(filename)
+        )
+        list(map(self._delete_path, extant_blockers))
+
+    def _delete_path(self, path):
+        log.info("Deleting %s", path)
+        if self.dry_run:
+            return
+
+        is_tree = os.path.isdir(path) and not os.path.islink(path)
+        remover = rmtree if is_tree else os.unlink
+        remover(path)
+
+    @staticmethod
+    def _render_version():
+        """
+        Render the Setuptools version and installation details, then exit.
+        """
+        ver = '{}.{}'.format(*sys.version_info)
+        dist = get_distribution('setuptools')
+        tmpl = 'setuptools {dist.version} from {dist.location} (Python {ver})'
+        print(tmpl.format(**locals()))
+        raise SystemExit()
+
+    def finalize_options(self):
+        self.version and self._render_version()
+
+        py_version = sys.version.split()[0]
+        prefix, exec_prefix = get_config_vars('prefix', 'exec_prefix')
+
+        self.config_vars = {
+            'dist_name': self.distribution.get_name(),
+            'dist_version': self.distribution.get_version(),
+            'dist_fullname': self.distribution.get_fullname(),
+            'py_version': py_version,
+            'py_version_short': py_version[0:3],
+            'py_version_nodot': py_version[0] + py_version[2],
+            'sys_prefix': prefix,
+            'prefix': prefix,
+            'sys_exec_prefix': exec_prefix,
+            'exec_prefix': exec_prefix,
+            # Only python 3.2+ has abiflags
+            'abiflags': getattr(sys, 'abiflags', ''),
+        }
+
+        if site.ENABLE_USER_SITE:
+            self.config_vars['userbase'] = self.install_userbase
+            self.config_vars['usersite'] = self.install_usersite
+
+        self._fix_install_dir_for_user_site()
+
+        self.expand_basedirs()
+        self.expand_dirs()
+
+        if self.install_layout:
+            if not self.install_layout.lower() in ['deb']:
+                raise DistutilsOptionError("unknown value for --install-layout")
+            self.install_layout = self.install_layout.lower()
+
+            import sysconfig
+            if sys.version_info[:2] >= (3, 3):
+                self.multiarch = sysconfig.get_config_var('MULTIARCH')
+
+        self._expand(
+            'install_dir', 'script_dir', 'build_directory',
+            'site_dirs',
+        )
+        # If a non-default installation directory was specified, default the
+        # script directory to match it.
+        if self.script_dir is None:
+            self.script_dir = self.install_dir
+
+        if self.no_find_links is None:
+            self.no_find_links = False
+
+        # Let install_dir get set by install_lib command, which in turn
+        # gets its info from the install command, and takes into account
+        # --prefix and --home and all that other crud.
+        self.set_undefined_options(
+            'install_lib', ('install_dir', 'install_dir')
+        )
+        # Likewise, set default script_dir from 'install_scripts.install_dir'
+        self.set_undefined_options(
+            'install_scripts', ('install_dir', 'script_dir')
+        )
+
+        if self.user and self.install_purelib:
+            self.install_dir = self.install_purelib
+            self.script_dir = self.install_scripts
+
+        if self.prefix == '/usr' and not self.force_installation_into_system_dir:
+            raise DistutilsOptionError("""installation into /usr
+
+Trying to install into the system managed parts of the file system. Please
+consider to install to another location, or use the option
+--force-installation-into-system-dir to overwrite this warning.
+""")
+
+        # default --record from the install command
+        self.set_undefined_options('install', ('record', 'record'))
+        # Should this be moved to the if statement below? It's not used
+        # elsewhere
+        normpath = map(normalize_path, sys.path)
+        self.all_site_dirs = get_site_dirs()
+        if self.site_dirs is not None:
+            site_dirs = [
+                os.path.expanduser(s.strip()) for s in
+                self.site_dirs.split(',')
+            ]
+            for d in site_dirs:
+                if not os.path.isdir(d):
+                    log.warn("%s (in --site-dirs) does not exist", d)
+                elif normalize_path(d) not in normpath:
+                    raise DistutilsOptionError(
+                        d + " (in --site-dirs) is not on sys.path"
+                    )
+                else:
+                    self.all_site_dirs.append(normalize_path(d))
+        if not self.editable:
+            self.check_site_dir()
+        self.index_url = self.index_url or "https://pypi.org/simple/"
+        self.shadow_path = self.all_site_dirs[:]
+        for path_item in self.install_dir, normalize_path(self.script_dir):
+            if path_item not in self.shadow_path:
+                self.shadow_path.insert(0, path_item)
+
+        if self.allow_hosts is not None:
+            hosts = [s.strip() for s in self.allow_hosts.split(',')]
+        else:
+            hosts = ['*']
+        if self.package_index is None:
+            self.package_index = self.create_index(
+                self.index_url, search_path=self.shadow_path, hosts=hosts,
+            )
+        self.local_index = Environment(self.shadow_path + sys.path)
+
+        if self.find_links is not None:
+            if isinstance(self.find_links, six.string_types):
+                self.find_links = self.find_links.split()
+        else:
+            self.find_links = []
+        if self.local_snapshots_ok:
+            self.package_index.scan_egg_links(self.shadow_path + sys.path)
+        if not self.no_find_links:
+            self.package_index.add_find_links(self.find_links)
+        self.set_undefined_options('install_lib', ('optimize', 'optimize'))
+        if not isinstance(self.optimize, int):
+            try:
+                self.optimize = int(self.optimize)
+                if not (0 <= self.optimize <= 2):
+                    raise ValueError
+            except ValueError:
+                raise DistutilsOptionError("--optimize must be 0, 1, or 2")
+
+        if self.editable and not self.build_directory:
+            raise DistutilsArgError(
+                "Must specify a build directory (-b) when using --editable"
+            )
+        if not self.args:
+            raise DistutilsArgError(
+                "No urls, filenames, or requirements specified (see --help)")
+
+        self.outputs = []
+
+    def _fix_install_dir_for_user_site(self):
+        """
+        Fix the install_dir if "--user" was used.
+        """
+        if not self.user or not site.ENABLE_USER_SITE:
+            return
+
+        self.create_home_path()
+        if self.install_userbase is None:
+            msg = "User base directory is not specified"
+            raise DistutilsPlatformError(msg)
+        self.install_base = self.install_platbase = self.install_userbase
+        scheme_name = os.name.replace('posix', 'unix') + '_user'
+        self.select_scheme(scheme_name)
+
+    def _expand_attrs(self, attrs):
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                if os.name == 'posix' or os.name == 'nt':
+                    val = os.path.expanduser(val)
+                val = subst_vars(val, self.config_vars)
+                setattr(self, attr, val)
+
+    def expand_basedirs(self):
+        """Calls `os.path.expanduser` on install_base, install_platbase and
+        root."""
+        self._expand_attrs(['install_base', 'install_platbase', 'root'])
+
+    def expand_dirs(self):
+        """Calls `os.path.expanduser` on install dirs."""
+        dirs = [
+            'install_purelib',
+            'install_platlib',
+            'install_lib',
+            'install_headers',
+            'install_scripts',
+            'install_data',
+        ]
+        self._expand_attrs(dirs)
+
+    def run(self, show_deprecation=True):
+        if show_deprecation:
+            self.announce(
+                "WARNING: The easy_install command is deprecated "
+                "and will be removed in a future version."
+                , log.WARN,
+            )
+        if self.verbose != self.distribution.verbose:
+            log.set_verbosity(self.verbose)
+        try:
+            for spec in self.args:
+                self.easy_install(spec, not self.no_deps)
+            if self.record:
+                outputs = list(sorted(self.outputs))
+                if self.root:  # strip any package prefix
+                    root_len = len(self.root)
+                    for counter in range(len(outputs)):
+                        outputs[counter] = outputs[counter][root_len:]
+                from distutils import file_util
+
+                self.execute(
+                    file_util.write_file, (self.record, outputs),
+                    "writing list of installed files to '%s'" %
+                    self.record
+                )
+            self.warn_deprecated_options()
+        finally:
+            log.set_verbosity(self.distribution.verbose)
+
+    def pseudo_tempname(self):
+        """Return a pseudo-tempname base in the install directory.
+        This code is intentionally naive; if a malicious party can write to
+        the target directory you're already in deep doodoo.
+        """
+        try:
+            pid = os.getpid()
+        except Exception:
+            pid = random.randint(0, sys.maxsize)
+        return os.path.join(self.install_dir, "test-easy-install-%s" % pid)
+
+    def warn_deprecated_options(self):
+        pass
+
+    def check_site_dir(self):
+        """Verify that self.install_dir is .pth-capable dir, if needed"""
+
+        instdir = normalize_path(self.install_dir)
+        pth_file = os.path.join(instdir, 'easy-install.pth')
+
+        # Is it a configured, PYTHONPATH, implicit, or explicit site dir?
+        is_site_dir = instdir in self.all_site_dirs
+
+        if not is_site_dir and not self.multi_version:
+            # No?  Then directly test whether it does .pth file processing
+            is_site_dir = self.check_pth_processing()
+        else:
+            # make sure we can write to target dir
+            testfile = self.pseudo_tempname() + '.write-test'
+            test_exists = os.path.exists(testfile)
+            try:
+                if test_exists:
+                    os.unlink(testfile)
+                open(testfile, 'w').close()
+                os.unlink(testfile)
+            except (OSError, IOError):
+                self.cant_write_to_target()
+
+        if not is_site_dir and not self.multi_version:
+            # Can't install non-multi to non-site dir
+            raise DistutilsError(self.no_default_version_msg())
+
+        if is_site_dir:
+            if self.pth_file is None:
+                self.pth_file = PthDistributions(pth_file, self.all_site_dirs)
+        else:
+            self.pth_file = None
+
+        if instdir not in map(normalize_path, _pythonpath()):
+            # only PYTHONPATH dirs need a site.py, so pretend it's there
+            self.sitepy_installed = True
+        elif self.multi_version and not os.path.exists(pth_file):
+            self.sitepy_installed = True  # don't need site.py in this case
+            self.pth_file = None  # and don't create a .pth file
+        self.install_dir = instdir
+
+    __cant_write_msg = textwrap.dedent("""
+        can't create or remove files in install directory
+
+        The following error occurred while trying to add or remove files in the
+        installation directory:
+
+            %s
+
+        The installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+        """).lstrip()
+
+    __not_exists_id = textwrap.dedent("""
+        This directory does not currently exist.  Please create it and try again, or
+        choose a different installation directory (using the -d or --install-dir
+        option).
+        """).lstrip()
+
+    __access_msg = textwrap.dedent("""
+        Perhaps your account does not have write access to this directory?  If the
+        installation directory is a system-owned directory, you may need to sign in
+        as the administrator or "root" account.  If you do not have administrative
+        access to this machine, you may wish to choose a different installation
+        directory, preferably one that is listed in your PYTHONPATH environment
+        variable.
+
+        For information on other options, you may wish to consult the
+        documentation at:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html
+
+        Please make the appropriate changes for your system and try again.
+        """).lstrip()
+
+    def cant_write_to_target(self):
+        msg = self.__cant_write_msg % (sys.exc_info()[1], self.install_dir,)
+
+        if not os.path.exists(self.install_dir):
+            msg += '\n' + self.__not_exists_id
+        else:
+            msg += '\n' + self.__access_msg
+        raise DistutilsError(msg)
+
+    def check_pth_processing(self):
+        """Empirically verify whether .pth files are supported in inst. dir"""
+        instdir = self.install_dir
+        log.info("Checking .pth file support in %s", instdir)
+        pth_file = self.pseudo_tempname() + ".pth"
+        ok_file = pth_file + '.ok'
+        ok_exists = os.path.exists(ok_file)
+        tmpl = _one_liner("""
+            import os
+            f = open({ok_file!r}, 'w')
+            f.write('OK')
+            f.close()
+            """) + '\n'
+        try:
+            if ok_exists:
+                os.unlink(ok_file)
+            dirname = os.path.dirname(ok_file)
+            pkg_resources.py31compat.makedirs(dirname, exist_ok=True)
+            f = open(pth_file, 'w')
+        except (OSError, IOError):
+            self.cant_write_to_target()
+        else:
+            try:
+                f.write(tmpl.format(**locals()))
+                f.close()
+                f = None
+                executable = sys.executable
+                if os.name == 'nt':
+                    dirname, basename = os.path.split(executable)
+                    alt = os.path.join(dirname, 'pythonw.exe')
+                    use_alt = (
+                        basename.lower() == 'python.exe' and
+                        os.path.exists(alt)
+                    )
+                    if use_alt:
+                        # use pythonw.exe to avoid opening a console window
+                        executable = alt
+
+                from distutils.spawn import spawn
+
+                spawn([executable, '-E', '-c', 'pass'], 0)
+
+                if os.path.exists(ok_file):
+                    log.info(
+                        "TEST PASSED: %s appears to support .pth files",
+                        instdir
+                    )
+                    return True
+            finally:
+                if f:
+                    f.close()
+                if os.path.exists(ok_file):
+                    os.unlink(ok_file)
+                if os.path.exists(pth_file):
+                    os.unlink(pth_file)
+        if not self.multi_version:
+            log.warn("TEST FAILED: %s does NOT support .pth files", instdir)
+        return False
+
+    def install_egg_scripts(self, dist):
+        """Write all the scripts for `dist`, unless scripts are excluded"""
+        if not self.exclude_scripts and dist.metadata_isdir('scripts'):
+            for script_name in dist.metadata_listdir('scripts'):
+                if dist.metadata_isdir('scripts/' + script_name):
+                    # The "script" is a directory, likely a Python 3
+                    # __pycache__ directory, so skip it.
+                    continue
+                self.install_script(
+                    dist, script_name,
+                    dist.get_metadata('scripts/' + script_name)
+                )
+        self.install_wrapper_scripts(dist)
+
+    def add_output(self, path):
+        if os.path.isdir(path):
+            for base, dirs, files in os.walk(path):
+                for filename in files:
+                    self.outputs.append(os.path.join(base, filename))
+        else:
+            self.outputs.append(path)
+
+    def not_editable(self, spec):
+        if self.editable:
+            raise DistutilsArgError(
+                "Invalid argument %r: you can't use filenames or URLs "
+                "with --editable (except via the --find-links option)."
+                % (spec,)
+            )
+
+    def check_editable(self, spec):
+        if not self.editable:
+            return
+
+        if os.path.exists(os.path.join(self.build_directory, spec.key)):
+            raise DistutilsArgError(
+                "%r already exists in %s; can't do a checkout there" %
+                (spec.key, self.build_directory)
+            )
+
+    @contextlib.contextmanager
+    def _tmpdir(self):
+        tmpdir = tempfile.mkdtemp(prefix=u"easy_install-")
+        try:
+            # cast to str as workaround for #709 and #710 and #712
+            yield str(tmpdir)
+        finally:
+            os.path.exists(tmpdir) and rmtree(rmtree_safe(tmpdir))
+
+    def easy_install(self, spec, deps=False):
+        if not self.editable:
+            self.install_site_py()
+
+        with self._tmpdir() as tmpdir:
+            if not isinstance(spec, Requirement):
+                if URL_SCHEME(spec):
+                    # It's a url, download it to tmpdir and process
+                    self.not_editable(spec)
+                    dl = self.package_index.download(spec, tmpdir)
+                    return self.install_item(None, dl, tmpdir, deps, True)
+
+                elif os.path.exists(spec):
+                    # Existing file or directory, just process it directly
+                    self.not_editable(spec)
+                    return self.install_item(None, spec, tmpdir, deps, True)
+                else:
+                    spec = parse_requirement_arg(spec)
+
+            self.check_editable(spec)
+            dist = self.package_index.fetch_distribution(
+                spec, tmpdir, self.upgrade, self.editable,
+                not self.always_copy, self.local_index
+            )
+            if dist is None:
+                msg = "Could not find suitable distribution for %r" % spec
+                if self.always_copy:
+                    msg += " (--always-copy skips system and development eggs)"
+                raise DistutilsError(msg)
+            elif dist.precedence == DEVELOP_DIST:
+                # .egg-info dists don't need installing, just process deps
+                self.process_distribution(spec, dist, deps, "Using")
+                return dist
+            else:
+                return self.install_item(spec, dist.location, tmpdir, deps)
+
+    def install_item(self, spec, download, tmpdir, deps, install_needed=False):
+
+        # Installation is also needed if file in tmpdir or is not an egg
+        install_needed = install_needed or self.always_copy
+        install_needed = install_needed or os.path.dirname(download) == tmpdir
+        install_needed = install_needed or not download.endswith('.egg')
+        install_needed = install_needed or (
+            self.always_copy_from is not None and
+            os.path.dirname(normalize_path(download)) ==
+            normalize_path(self.always_copy_from)
+        )
+
+        if spec and not install_needed:
+            # at this point, we know it's a local .egg, we just don't know if
+            # it's already installed.
+            for dist in self.local_index[spec.project_name]:
+                if dist.location == download:
+                    break
+            else:
+                install_needed = True  # it's not in the local index
+
+        log.info("Processing %s", os.path.basename(download))
+
+        if install_needed:
+            dists = self.install_eggs(spec, download, tmpdir)
+            for dist in dists:
+                self.process_distribution(spec, dist, deps)
+        else:
+            dists = [self.egg_distribution(download)]
+            self.process_distribution(spec, dists[0], deps, "Using")
+
+        if spec is not None:
+            for dist in dists:
+                if dist in spec:
+                    return dist
+
+    def select_scheme(self, name):
+        """Sets the install directories by applying the install schemes."""
+        # it's the caller's problem if they supply a bad name!
+        scheme = INSTALL_SCHEMES[name]
+        for key in SCHEME_KEYS:
+            attrname = 'install_' + key
+            if getattr(self, attrname) is None:
+                setattr(self, attrname, scheme[key])
+
+    def process_distribution(self, requirement, dist, deps=True, *info):
+        self.update_pth(dist)
+        self.package_index.add(dist)
+        if dist in self.local_index[dist.key]:
+            self.local_index.remove(dist)
+        self.local_index.add(dist)
+        self.install_egg_scripts(dist)
+        self.installed_projects[dist.key] = dist
+        log.info(self.installation_report(requirement, dist, *info))
+        if (dist.has_metadata('dependency_links.txt') and
+                not self.no_find_links):
+            self.package_index.add_find_links(
+                dist.get_metadata_lines('dependency_links.txt')
+            )
+        if not deps and not self.always_copy:
+            return
+        elif requirement is not None and dist.key != requirement.key:
+            log.warn("Skipping dependencies for %s", dist)
+            return  # XXX this is not the distribution we were looking for
+        elif requirement is None or dist not in requirement:
+            # if we wound up with a different version, resolve what we've got
+            distreq = dist.as_requirement()
+            requirement = Requirement(str(distreq))
+        log.info("Processing dependencies for %s", requirement)
+        try:
+            distros = WorkingSet([]).resolve(
+                [requirement], self.local_index, self.easy_install
+            )
+        except DistributionNotFound as e:
+            raise DistutilsError(str(e))
+        except VersionConflict as e:
+            raise DistutilsError(e.report())
+        if self.always_copy or self.always_copy_from:
+            # Force all the relevant distros to be copied or activated
+            for dist in distros:
+                if dist.key not in self.installed_projects:
+                    self.easy_install(dist.as_requirement())
+        log.info("Finished processing dependencies for %s", requirement)
+
+    def should_unzip(self, dist):
+        if self.zip_ok is not None:
+            return not self.zip_ok
+        if dist.has_metadata('not-zip-safe'):
+            return True
+        if not dist.has_metadata('zip-safe'):
+            return True
+        return False
+
+    def maybe_move(self, spec, dist_filename, setup_base):
+        dst = os.path.join(self.build_directory, spec.key)
+        if os.path.exists(dst):
+            msg = (
+                "%r already exists in %s; build directory %s will not be kept"
+            )
+            log.warn(msg, spec.key, self.build_directory, setup_base)
+            return setup_base
+        if os.path.isdir(dist_filename):
+            setup_base = dist_filename
+        else:
+            if os.path.dirname(dist_filename) == setup_base:
+                os.unlink(dist_filename)  # get it out of the tmp dir
+            contents = os.listdir(setup_base)
+            if len(contents) == 1:
+                dist_filename = os.path.join(setup_base, contents[0])
+                if os.path.isdir(dist_filename):
+                    # if the only thing there is a directory, move it instead
+                    setup_base = dist_filename
+        ensure_directory(dst)
+        shutil.move(setup_base, dst)
+        return dst
+
+    def install_wrapper_scripts(self, dist):
+        if self.exclude_scripts:
+            return
+        for args in ScriptWriter.best().get_args(dist):
+            self.write_script(*args)
+
+    def install_script(self, dist, script_name, script_text, dev_path=None):
+        """Generate a legacy script wrapper and install it"""
+        spec = str(dist.as_requirement())
+        is_script = is_python_script(script_text, script_name)
+
+        if is_script:
+            body = self._load_template(dev_path) % locals()
+            script_text = ScriptWriter.get_header(script_text) + body
+        self.write_script(script_name, _to_bytes(script_text), 'b')
+
+    @staticmethod
+    def _load_template(dev_path):
+        """
+        There are a couple of template scripts in the package. This
+        function loads one of them and prepares it for use.
+        """
+        # See https://github.com/pypa/setuptools/issues/134 for info
+        # on script file naming and downstream issues with SVR4
+        name = 'script.tmpl'
+        if dev_path:
+            name = name.replace('.tmpl', ' (dev).tmpl')
+
+        raw_bytes = resource_string('setuptools', name)
+        return raw_bytes.decode('utf-8')
+
+    def write_script(self, script_name, contents, mode="t", blockers=()):
+        """Write an executable file to the scripts directory"""
+        self.delete_blockers(  # clean up old .py/.pyw w/o a script
+            [os.path.join(self.script_dir, x) for x in blockers]
+        )
+        log.info("Installing %s script to %s", script_name, self.script_dir)
+        target = os.path.join(self.script_dir, script_name)
+        self.add_output(target)
+
+        if self.dry_run:
+            return
+
+        mask = current_umask()
+        ensure_directory(target)
+        if os.path.exists(target):
+            os.unlink(target)
+        with open(target, "w" + mode) as f:
+            f.write(contents)
+        chmod(target, 0o777 - mask)
+
+    def install_eggs(self, spec, dist_filename, tmpdir):
+        # .egg dirs or files are already built, so just return them
+        if dist_filename.lower().endswith('.egg'):
+            return [self.install_egg(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.exe'):
+            return [self.install_exe(dist_filename, tmpdir)]
+        elif dist_filename.lower().endswith('.whl'):
+            return [self.install_wheel(dist_filename, tmpdir)]
+
+        # Anything else, try to extract and build
+        setup_base = tmpdir
+        if os.path.isfile(dist_filename) and not dist_filename.endswith('.py'):
+            unpack_archive(dist_filename, tmpdir, self.unpack_progress)
+        elif os.path.isdir(dist_filename):
+            setup_base = os.path.abspath(dist_filename)
+
+        if (setup_base.startswith(tmpdir)  # something we downloaded
+                and self.build_directory and spec is not None):
+            setup_base = self.maybe_move(spec, dist_filename, setup_base)
+
+        # Find the setup.py file
+        setup_script = os.path.join(setup_base, 'setup.py')
+
+        if not os.path.exists(setup_script):
+            setups = glob(os.path.join(setup_base, '*', 'setup.py'))
+            if not setups:
+                raise DistutilsError(
+                    "Couldn't find a setup script in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            if len(setups) > 1:
+                raise DistutilsError(
+                    "Multiple setup scripts in %s" %
+                    os.path.abspath(dist_filename)
+                )
+            setup_script = setups[0]
+
+        # Now run it, and return the result
+        if self.editable:
+            log.info(self.report_editable(spec, setup_script))
+            return []
+        else:
+            return self.build_and_install(setup_script, setup_base)
+
+    def egg_distribution(self, egg_path):
+        if os.path.isdir(egg_path):
+            metadata = PathMetadata(egg_path, os.path.join(egg_path,
+                                                           'EGG-INFO'))
+        else:
+            metadata = EggMetadata(zipimport.zipimporter(egg_path))
+        return Distribution.from_filename(egg_path, metadata=metadata)
+
+    def install_egg(self, egg_path, tmpdir):
+        destination = os.path.join(
+            self.install_dir,
+            os.path.basename(egg_path),
+        )
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+
+        dist = self.egg_distribution(egg_path)
+        if not samefile(egg_path, destination):
+            if os.path.isdir(destination) and not os.path.islink(destination):
+                dir_util.remove_tree(destination, dry_run=self.dry_run)
+            elif os.path.exists(destination):
+                self.execute(
+                    os.unlink,
+                    (destination,),
+                    "Removing " + destination,
+                )
+            try:
+                new_dist_is_zipped = False
+                if os.path.isdir(egg_path):
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copytree, "Copying"
+                elif self.should_unzip(dist):
+                    self.mkpath(destination)
+                    f, m = self.unpack_and_compile, "Extracting"
+                else:
+                    new_dist_is_zipped = True
+                    if egg_path.startswith(tmpdir):
+                        f, m = shutil.move, "Moving"
+                    else:
+                        f, m = shutil.copy2, "Copying"
+                self.execute(
+                    f,
+                    (egg_path, destination),
+                    (m + " %s to %s") % (
+                        os.path.basename(egg_path),
+                        os.path.dirname(destination)
+                    ),
+                )
+                update_dist_caches(
+                    destination,
+                    fix_zipimporter_caches=new_dist_is_zipped,
+                )
+            except Exception:
+                update_dist_caches(destination, fix_zipimporter_caches=False)
+                raise
+
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    def install_exe(self, dist_filename, tmpdir):
+        # See if it's valid, get data
+        cfg = extract_wininst_cfg(dist_filename)
+        if cfg is None:
+            raise DistutilsError(
+                "%s is not a valid distutils Windows .exe" % dist_filename
+            )
+        # Create a dummy distribution object until we build the real distro
+        dist = Distribution(
+            None,
+            project_name=cfg.get('metadata', 'name'),
+            version=cfg.get('metadata', 'version'), platform=get_platform(),
+        )
+
+        # Convert the .exe to an unpacked egg
+        egg_path = os.path.join(tmpdir, dist.egg_name() + '.egg')
+        dist.location = egg_path
+        egg_tmp = egg_path + '.tmp'
+        _egg_info = os.path.join(egg_tmp, 'EGG-INFO')
+        pkg_inf = os.path.join(_egg_info, 'PKG-INFO')
+        ensure_directory(pkg_inf)  # make sure EGG-INFO dir exists
+        dist._provider = PathMetadata(egg_tmp, _egg_info)  # XXX
+        self.exe_to_egg(dist_filename, egg_tmp)
+
+        # Write EGG-INFO/PKG-INFO
+        if not os.path.exists(pkg_inf):
+            f = open(pkg_inf, 'w')
+            f.write('Metadata-Version: 1.0\n')
+            for k, v in cfg.items('metadata'):
+                if k != 'target_version':
+                    f.write('%s: %s\n' % (k.replace('_', '-').title(), v))
+            f.close()
+        script_dir = os.path.join(_egg_info, 'scripts')
+        # delete entry-point scripts to avoid duping
+        self.delete_blockers([
+            os.path.join(script_dir, args[0])
+            for args in ScriptWriter.get_args(dist)
+        ])
+        # Build .egg file from tmpdir
+        bdist_egg.make_zipfile(
+            egg_path, egg_tmp, verbose=self.verbose, dry_run=self.dry_run,
+        )
+        # install the .egg
+        return self.install_egg(egg_path, tmpdir)
+
+    def exe_to_egg(self, dist_filename, egg_tmp):
+        """Extract a bdist_wininst to the directories an egg would use"""
+        # Check for .pth file and set up prefix translations
+        prefixes = get_exe_prefixes(dist_filename)
+        to_compile = []
+        native_libs = []
+        top_level = {}
+
+        def process(src, dst):
+            s = src.lower()
+            for old, new in prefixes:
+                if s.startswith(old):
+                    src = new + src[len(old):]
+                    parts = src.split('/')
+                    dst = os.path.join(egg_tmp, *parts)
+                    dl = dst.lower()
+                    if dl.endswith('.pyd') or dl.endswith('.dll'):
+                        parts[-1] = bdist_egg.strip_module(parts[-1])
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        native_libs.append(src)
+                    elif dl.endswith('.py') and old != 'SCRIPTS/':
+                        top_level[os.path.splitext(parts[0])[0]] = 1
+                        to_compile.append(dst)
+                    return dst
+            if not src.endswith('.pth'):
+                log.warn("WARNING: can't process %s", src)
+            return None
+
+        # extract, tracking .pyd/.dll->native_libs and .py -> to_compile
+        unpack_archive(dist_filename, egg_tmp, process)
+        stubs = []
+        for res in native_libs:
+            if res.lower().endswith('.pyd'):  # create stubs for .pyd's
+                parts = res.split('/')
+                resource = parts[-1]
+                parts[-1] = bdist_egg.strip_module(parts[-1]) + '.py'
+                pyfile = os.path.join(egg_tmp, *parts)
+                to_compile.append(pyfile)
+                stubs.append(pyfile)
+                bdist_egg.write_stub(resource, pyfile)
+        self.byte_compile(to_compile)  # compile .py's
+        bdist_egg.write_safety_flag(
+            os.path.join(egg_tmp, 'EGG-INFO'),
+            bdist_egg.analyze_egg(egg_tmp, stubs))  # write zip-safety flag
+
+        for name in 'top_level', 'native_libs':
+            if locals()[name]:
+                txt = os.path.join(egg_tmp, 'EGG-INFO', name + '.txt')
+                if not os.path.exists(txt):
+                    f = open(txt, 'w')
+                    f.write('\n'.join(locals()[name]) + '\n')
+                    f.close()
+
+    def install_wheel(self, wheel_path, tmpdir):
+        wheel = Wheel(wheel_path)
+        assert wheel.is_compatible()
+        destination = os.path.join(self.install_dir, wheel.egg_name())
+        destination = os.path.abspath(destination)
+        if not self.dry_run:
+            ensure_directory(destination)
+        if os.path.isdir(destination) and not os.path.islink(destination):
+            dir_util.remove_tree(destination, dry_run=self.dry_run)
+        elif os.path.exists(destination):
+            self.execute(
+                os.unlink,
+                (destination,),
+                "Removing " + destination,
+            )
+        try:
+            self.execute(
+                wheel.install_as_egg,
+                (destination,),
+                ("Installing %s to %s") % (
+                    os.path.basename(wheel_path),
+                    os.path.dirname(destination)
+                ),
+            )
+        finally:
+            update_dist_caches(destination, fix_zipimporter_caches=False)
+        self.add_output(destination)
+        return self.egg_distribution(destination)
+
+    __mv_warning = textwrap.dedent("""
+        Because this distribution was installed --multi-version, before you can
+        import modules from this package in an application, you will need to
+        'import pkg_resources' and then use a 'require()' call similar to one of
+        these examples, in order to select the desired version:
+
+            pkg_resources.require("%(name)s")  # latest installed version
+            pkg_resources.require("%(name)s==%(version)s")  # this exact version
+            pkg_resources.require("%(name)s>=%(version)s")  # this version or higher
+        """).lstrip()
+
+    __id_warning = textwrap.dedent("""
+        Note also that the installation directory must be on sys.path at runtime for
+        this to work.  (e.g. by being the application's script directory, by being on
+        PYTHONPATH, or by being added to sys.path by your code.)
+        """)
+
+    def installation_report(self, req, dist, what="Installed"):
+        """Helpful installation message for display to package users"""
+        msg = "\n%(what)s %(eggloc)s%(extras)s"
+        if self.multi_version and not self.no_report:
+            msg += '\n' + self.__mv_warning
+            if self.install_dir not in map(normalize_path, sys.path):
+                msg += '\n' + self.__id_warning
+
+        eggloc = dist.location
+        name = dist.project_name
+        version = dist.version
+        extras = ''  # TODO: self.report_extras(req, dist)
+        return msg % locals()
+
+    __editable_msg = textwrap.dedent("""
+        Extracted editable version of %(spec)s to %(dirname)s
+
+        If it uses setuptools in its setup script, you can activate it in
+        "development" mode by going to that directory and running::
+
+            %(python)s setup.py develop
+
+        See the setuptools documentation for the "develop" command for more info.
+        """).lstrip()
+
+    def report_editable(self, spec, setup_script):
+        dirname = os.path.dirname(setup_script)
+        python = sys.executable
+        return '\n' + self.__editable_msg % locals()
+
+    def run_setup(self, setup_script, setup_base, args):
+        sys.modules.setdefault('distutils.command.bdist_egg', bdist_egg)
+        sys.modules.setdefault('distutils.command.egg_info', egg_info)
+
+        args = list(args)
+        if self.verbose > 2:
+            v = 'v' * (self.verbose - 1)
+            args.insert(0, '-' + v)
+        elif self.verbose < 2:
+            args.insert(0, '-q')
+        if self.dry_run:
+            args.insert(0, '-n')
+        log.info(
+            "Running %s %s", setup_script[len(setup_base) + 1:], ' '.join(args)
+        )
+        try:
+            run_setup(setup_script, args)
+        except SystemExit as v:
+            raise DistutilsError("Setup script exited with %s" % (v.args[0],))
+
+    def build_and_install(self, setup_script, setup_base):
+        args = ['bdist_egg', '--dist-dir']
+
+        dist_dir = tempfile.mkdtemp(
+            prefix='egg-dist-tmp-', dir=os.path.dirname(setup_script)
+        )
+        try:
+            self._set_fetcher_options(os.path.dirname(setup_script))
+            args.append(dist_dir)
+
+            self.run_setup(setup_script, setup_base, args)
+            all_eggs = Environment([dist_dir])
+            eggs = []
+            for key in all_eggs:
+                for dist in all_eggs[key]:
+                    eggs.append(self.install_egg(dist.location, setup_base))
+            if not eggs and not self.dry_run:
+                log.warn("No eggs found in %s (setup script problem?)",
+                         dist_dir)
+            return eggs
+        finally:
+            rmtree(dist_dir)
+            log.set_verbosity(self.verbose)  # restore our log verbosity
+
+    def _set_fetcher_options(self, base):
+        """
+        When easy_install is about to run bdist_egg on a source dist, that
+        source dist might have 'setup_requires' directives, requiring
+        additional fetching. Ensure the fetcher options given to easy_install
+        are available to that command as well.
+        """
+        # find the fetch options from easy_install and write them out
+        # to the setup.cfg file.
+        ei_opts = self.distribution.get_option_dict('easy_install').copy()
+        fetch_directives = (
+            'find_links', 'site_dirs', 'index_url', 'optimize', 'allow_hosts',
+        )
+        fetch_options = {}
+        for key, val in ei_opts.items():
+            if key not in fetch_directives:
+                continue
+            fetch_options[key.replace('_', '-')] = val[1]
+        # create a settings dictionary suitable for `edit_config`
+        settings = dict(easy_install=fetch_options)
+        cfg_filename = os.path.join(base, 'setup.cfg')
+        setopt.edit_config(cfg_filename, settings)
+
+    def update_pth(self, dist):
+        if self.pth_file is None:
+            return
+
+        for d in self.pth_file[dist.key]:  # drop old entries
+            if self.multi_version or d.location != dist.location:
+                log.info("Removing %s from easy-install.pth file", d)
+                self.pth_file.remove(d)
+                if d.location in self.shadow_path:
+                    self.shadow_path.remove(d.location)
+
+        if not self.multi_version:
+            if dist.location in self.pth_file.paths:
+                log.info(
+                    "%s is already the active version in easy-install.pth",
+                    dist,
+                )
+            else:
+                log.info("Adding %s to easy-install.pth file", dist)
+                self.pth_file.add(dist)  # add new entry
+                if dist.location not in self.shadow_path:
+                    self.shadow_path.append(dist.location)
+
+        if not self.dry_run:
+
+            self.pth_file.save()
+
+            if dist.key == 'setuptools':
+                # Ensure that setuptools itself never becomes unavailable!
+                # XXX should this check for latest version?
+                filename = os.path.join(self.install_dir, 'setuptools.pth')
+                if os.path.islink(filename):
+                    os.unlink(filename)
+                f = open(filename, 'wt')
+                f.write(self.pth_file.make_relative(dist.location) + '\n')
+                f.close()
+
+    def unpack_progress(self, src, dst):
+        # Progress filter for unpacking
+        log.debug("Unpacking %s to %s", src, dst)
+        return dst  # only unpack-and-compile skips files for dry run
+
+    def unpack_and_compile(self, egg_path, destination):
+        to_compile = []
+        to_chmod = []
+
+        def pf(src, dst):
+            if dst.endswith('.py') and not src.startswith('EGG-INFO/'):
+                to_compile.append(dst)
+            elif dst.endswith('.dll') or dst.endswith('.so'):
+                to_chmod.append(dst)
+            self.unpack_progress(src, dst)
+            return not self.dry_run and dst or None
+
+        unpack_archive(egg_path, destination, pf)
+        self.byte_compile(to_compile)
+        if not self.dry_run:
+            for f in to_chmod:
+                mode = ((os.stat(f)[stat.ST_MODE]) | 0o555) & 0o7755
+                chmod(f, mode)
+
+    def byte_compile(self, to_compile):
+        if sys.dont_write_bytecode:
+            return
+
+        from distutils.util import byte_compile
+
+        try:
+            # try to make the byte compile messages quieter
+            log.set_verbosity(self.verbose - 1)
+
+            byte_compile(to_compile, optimize=0, force=1, dry_run=self.dry_run)
+            if self.optimize:
+                byte_compile(
+                    to_compile, optimize=self.optimize, force=1,
+                    dry_run=self.dry_run,
+                )
+        finally:
+            log.set_verbosity(self.verbose)  # restore original verbosity
+
+    __no_default_msg = textwrap.dedent("""
+        bad install directory or PYTHONPATH
+
+        You are attempting to install a package to a directory that is not
+        on PYTHONPATH and which Python does not read ".pth" files from.  The
+        installation directory you specified (via --install-dir, --prefix, or
+        the distutils default setting) was:
+
+            %s
+
+        and your PYTHONPATH environment variable currently contains:
+
+            %r
+
+        Here are some of your options for correcting the problem:
+
+        * You can choose a different installation directory, i.e., one that is
+          on PYTHONPATH or supports .pth files
+
+        * You can add the installation directory to the PYTHONPATH environment
+          variable.  (It must then also be on PYTHONPATH whenever you run
+          Python and want to use the package(s) you are installing.)
+
+        * You can set up the installation directory to support ".pth" files by
+          using one of the approaches described here:
+
+          https://setuptools.readthedocs.io/en/latest/easy_install.html#custom-installation-locations
+
+
+        Please make the appropriate changes for your system and try again.""").lstrip()
+
+    def no_default_version_msg(self):
+        template = self.__no_default_msg
+        return template % (self.install_dir, os.environ.get('PYTHONPATH', ''))
+
+    def install_site_py(self):
+        """Make sure there's a site.py in the target dir, if needed"""
+
+        if self.sitepy_installed:
+            return  # already did it, or don't need to
+
+        sitepy = os.path.join(self.install_dir, "site.py")
+        source = resource_string("setuptools", "site-patch.py")
+        source = source.decode('utf-8')
+        current = ""
+
+        if os.path.exists(sitepy):
+            log.debug("Checking existing site.py in %s", self.install_dir)
+            with io.open(sitepy) as strm:
+                current = strm.read()
+
+            if not current.startswith('def __boot():'):
+                raise DistutilsError(
+                    "%s is not a setuptools-generated site.py; please"
+                    " remove it." % sitepy
+                )
+
+        if current != source:
+            log.info("Creating %s", sitepy)
+            if not self.dry_run:
+                ensure_directory(sitepy)
+                with io.open(sitepy, 'w', encoding='utf-8') as strm:
+                    strm.write(source)
+            self.byte_compile([sitepy])
+
+        self.sitepy_installed = True
+
+    def create_home_path(self):
+        """Create directories under ~."""
+        if not self.user:
+            return
+        home = convert_path(os.path.expanduser("~"))
+        for name, path in six.iteritems(self.config_vars):
+            if path.startswith(home) and not os.path.isdir(path):
+                self.debug_print("os.makedirs('%s', 0o700)" % path)
+                os.makedirs(path, 0o700)
+
+    if sys.version[:3] in ('2.3', '2.4', '2.5') or 'real_prefix' in sys.__dict__:
+        sitedir_name = 'site-packages'
+    else:
+        sitedir_name = 'dist-packages'
+
+    INSTALL_SCHEMES = dict(
+        posix=dict(
+            install_dir='$base/lib/python$py_version_short/site-packages',
+            script_dir='$base/bin',
+        ),
+        unix_local = dict(
+            install_dir = '$base/local/lib/python$py_version_short/%s' % sitedir_name,
+            script_dir  = '$base/local/bin',
+        ),
+        posix_local = dict(
+            install_dir = '$base/local/lib/python$py_version_short/%s' % sitedir_name,
+            script_dir  = '$base/local/bin',
+        ),
+        deb_system = dict(
+            install_dir = '$base/lib/python3/%s' % sitedir_name,
+            script_dir  = '$base/bin',
+        ),
+    )
+
+    DEFAULT_SCHEME = dict(
+        install_dir='$base/Lib/site-packages',
+        script_dir='$base/Scripts',
+    )
+
+    def _expand(self, *attrs):
+        config_vars = self.get_finalized_command('install').config_vars
+
+        if self.prefix or self.install_layout:
+            if self.install_layout and self.install_layout in ['deb']:
+                    scheme_name = "deb_system"
+                    self.prefix = '/usr'
+            elif self.prefix or 'real_prefix' in sys.__dict__:
+                scheme_name = os.name
+            else:
+                scheme_name = "posix_local"
+            # Set default install_dir/scripts from --prefix
+            config_vars = config_vars.copy()
+            config_vars['base'] = self.prefix
+            scheme = self.INSTALL_SCHEMES.get(scheme_name,self.DEFAULT_SCHEME)
+            for attr, val in scheme.items():
+                if getattr(self, attr, None) is None:
+                    setattr(self, attr, val)
+
+        from distutils.util import subst_vars
+
+        for attr in attrs:
+            val = getattr(self, attr)
+            if val is not None:
+                val = subst_vars(val, config_vars)
+                if os.name == 'posix':
+                    val = os.path.expanduser(val)
+                setattr(self, attr, val)
+
+
+def _pythonpath():
+    items = os.environ.get('PYTHONPATH', '').split(os.pathsep)
+    return filter(None, items)
+
+
+def get_site_dirs():
+    """
+    Return a list of 'site' dirs
+    """
+
+    sitedirs = []
+
+    # start with PYTHONPATH
+    sitedirs.extend(_pythonpath())
+
+    prefixes = [sys.prefix]
+    if sys.exec_prefix != sys.prefix:
+        prefixes.append(sys.exec_prefix)
+    for prefix in prefixes:
+        if prefix:
+            if sys.platform in ('os2emx', 'riscos'):
+                sitedirs.append(os.path.join(prefix, "Lib", "site-packages"))
+            elif os.sep == '/':
+                sitedirs.extend([
+                    os.path.join(
+                        prefix,
+                        "local/lib",
+                        "python" + sys.version[:3],
+                        "dist-packages",
+                    ),
+                    os.path.join(
+                        prefix,
+                        "lib",
+                        "python{}.{}".format(*sys.version_info),
+                        "dist-packages",
+                    ),
+                    os.path.join(prefix, "lib", "site-python"),
+                ])
+            else:
+                sitedirs.extend([
+                    prefix,
+                    os.path.join(prefix, "lib", "site-packages"),
+                ])
+            if sys.platform == 'darwin':
+                # for framework builds *only* we add the standard Apple
+                # locations. Currently only per-user, but /Library and
+                # /Network/Library could be added too
+                if 'Python.framework' in prefix:
+                    home = os.environ.get('HOME')
+                    if home:
+                        home_sp = os.path.join(
+                            home,
+                            'Library',
+                            'Python',
+                            '{}.{}'.format(*sys.version_info),
+                            'site-packages',
+                        )
+                        sitedirs.append(home_sp)
+    lib_paths = get_path('purelib'), get_path('platlib')
+    for site_lib in lib_paths:
+        if site_lib not in sitedirs:
+            sitedirs.append(site_lib)
+
+    if site.ENABLE_USER_SITE:
+        sitedirs.append(site.USER_SITE)
+
+    try:
+        sitedirs.extend(site.getsitepackages())
+    except AttributeError:
+        pass
+
+    sitedirs = list(map(normalize_path, sitedirs))
+
+    return sitedirs
+
+
+def expand_paths(inputs):
+    """Yield sys.path directories that might contain "old-style" packages"""
+
+    seen = {}
+
+    for dirname in inputs:
+        dirname = normalize_path(dirname)
+        if dirname in seen:
+            continue
+
+        seen[dirname] = 1
+        if not os.path.isdir(dirname):
+            continue
+
+        files = os.listdir(dirname)
+        yield dirname, files
+
+        for name in files:
+            if not name.endswith('.pth'):
+                # We only care about the .pth files
+                continue
+            if name in ('easy-install.pth', 'setuptools.pth'):
+                # Ignore .pth files that we control
+                continue
+
+            # Read the .pth file
+            f = open(os.path.join(dirname, name))
+            lines = list(yield_lines(f))
+            f.close()
+
+            # Yield existing non-dupe, non-import directory lines from it
+            for line in lines:
+                if not line.startswith("import"):
+                    line = normalize_path(line.rstrip())
+                    if line not in seen:
+                        seen[line] = 1
+                        if not os.path.isdir(line):
+                            continue
+                        yield line, os.listdir(line)
+
+
+def extract_wininst_cfg(dist_filename):
+    """Extract configuration data from a bdist_wininst .exe
+
+    Returns a configparser.RawConfigParser, or None
+    """
+    f = open(dist_filename, 'rb')
+    try:
+        endrec = zipfile._EndRecData(f)
+        if endrec is None:
+            return None
+
+        prepended = (endrec[9] - endrec[5]) - endrec[6]
+        if prepended < 12:  # no wininst data here
+            return None
+        f.seek(prepended - 12)
+
+        tag, cfglen, bmlen = struct.unpack("<iii", f.read(12))
+        if tag not in (0x1234567A, 0x1234567B):
+            return None  # not a valid tag
+
+        f.seek(prepended - (12 + cfglen))
+        init = {'version': '', 'target_version': ''}
+        cfg = configparser.RawConfigParser(init)
+        try:
+            part = f.read(cfglen)
+            # Read up to the first null byte.
+            config = part.split(b'\0', 1)[0]
+            # Now the config is in bytes, but for RawConfigParser, it should
+            #  be text, so decode it.
+            config = config.decode(sys.getfilesystemencoding())
+            cfg.readfp(six.StringIO(config))
+        except configparser.Error:
+            return None
+        if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
+            return None
+        return cfg
+
+    finally:
+        f.close()
+
+
+def get_exe_prefixes(exe_filename):
+    """Get exe->egg path translations for a given .exe file"""
+
+    prefixes = [
+        ('PURELIB/', ''),
+        ('PLATLIB/pywin32_system32', ''),
+        ('PLATLIB/', ''),
+        ('SCRIPTS/', 'EGG-INFO/scripts/'),
+        ('DATA/lib/site-packages', ''),
+    ]
+    z = zipfile.ZipFile(exe_filename)
+    try:
+        for info in z.infolist():
+            name = info.filename
+            parts = name.split('/')
+            if len(parts) == 3 and parts[2] == 'PKG-INFO':
+                if parts[1].endswith('.egg-info'):
+                    prefixes.insert(0, ('/'.join(parts[:2]), 'EGG-INFO/'))
+                    break
+            if len(parts) != 2 or not name.endswith('.pth'):
+                continue
+            if name.endswith('-nspkg.pth'):
+                continue
+            if parts[0].upper() in ('PURELIB', 'PLATLIB'):
+                contents = z.read(name)
+                if not six.PY2:
+                    contents = contents.decode()
+                for pth in yield_lines(contents):
+                    pth = pth.strip().replace('\\', '/')
+                    if not pth.startswith('import'):
+                        prefixes.append((('%s/%s/' % (parts[0], pth)), ''))
+    finally:
+        z.close()
+    prefixes = [(x.lower(), y) for x, y in prefixes]
+    prefixes.sort()
+    prefixes.reverse()
+    return prefixes
+
+
+class PthDistributions(Environment):
+    """A .pth file with Distribution paths in it"""
+
+    dirty = False
+
+    def __init__(self, filename, sitedirs=()):
+        self.filename = filename
+        self.sitedirs = list(map(normalize_path, sitedirs))
+        self.basedir = normalize_path(os.path.dirname(self.filename))
+        self._load()
+        Environment.__init__(self, [], None, None)
+        for path in yield_lines(self.paths):
+            list(map(self.add, find_distributions(path, True)))
+
+    def _load(self):
+        self.paths = []
+        saw_import = False
+        seen = dict.fromkeys(self.sitedirs)
+        if os.path.isfile(self.filename):
+            f = open(self.filename, 'rt')
+            for line in f:
+                if line.startswith('import'):
+                    saw_import = True
+                    continue
+                path = line.rstrip()
+                self.paths.append(path)
+                if not path.strip() or path.strip().startswith('#'):
+                    continue
+                # skip non-existent paths, in case somebody deleted a package
+                # manually, and duplicate paths as well
+                path = self.paths[-1] = normalize_path(
+                    os.path.join(self.basedir, path)
+                )
+                if not os.path.exists(path) or path in seen:
+                    self.paths.pop()  # skip it
+                    self.dirty = True  # we cleaned up, so we're dirty now :)
+                    continue
+                seen[path] = 1
+            f.close()
+
+        if self.paths and not saw_import:
+            self.dirty = True  # ensure anything we touch has import wrappers
+        while self.paths and not self.paths[-1].strip():
+            self.paths.pop()
+
+    def save(self):
+        """Write changed .pth file back to disk"""
+        if not self.dirty:
+            return
+
+        rel_paths = list(map(self.make_relative, self.paths))
+        if rel_paths:
+            log.debug("Saving %s", self.filename)
+            lines = self._wrap_lines(rel_paths)
+            data = '\n'.join(lines) + '\n'
+
+            if os.path.islink(self.filename):
+                os.unlink(self.filename)
+            with open(self.filename, 'wt') as f:
+                f.write(data)
+
+        elif os.path.exists(self.filename):
+            log.debug("Deleting empty %s", self.filename)
+            os.unlink(self.filename)
+
+        self.dirty = False
+
+    @staticmethod
+    def _wrap_lines(lines):
+        return lines
+
+    def add(self, dist):
+        """Add `dist` to the distribution map"""
+        new_path = (
+            dist.location not in self.paths and (
+                dist.location not in self.sitedirs or
+                # account for '.' being in PYTHONPATH
+                dist.location == os.getcwd()
+            )
+        )
+        if new_path:
+            self.paths.append(dist.location)
+            self.dirty = True
+        Environment.add(self, dist)
+
+    def remove(self, dist):
+        """Remove `dist` from the distribution map"""
+        while dist.location in self.paths:
+            self.paths.remove(dist.location)
+            self.dirty = True
+        Environment.remove(self, dist)
+
+    def make_relative(self, path):
+        npath, last = os.path.split(normalize_path(path))
+        baselen = len(self.basedir)
+        parts = [last]
+        sep = os.altsep == '/' and '/' or os.sep
+        while len(npath) >= baselen:
+            if npath == self.basedir:
+                parts.append(os.curdir)
+                parts.reverse()
+                return sep.join(parts)
+            npath, last = os.path.split(npath)
+            parts.append(last)
+        else:
+            return path
+
+
+class RewritePthDistributions(PthDistributions):
+    @classmethod
+    def _wrap_lines(cls, lines):
+        yield cls.prelude
+        for line in lines:
+            yield line
+        yield cls.postlude
+
+    prelude = _one_liner("""
+        import sys
+        sys.__plen = len(sys.path)
+        """)
+    postlude = _one_liner("""
+        import sys
+        new = sys.path[sys.__plen:]
+        del sys.path[sys.__plen:]
+        p = getattr(sys, '__egginsert', 0)
+        sys.path[p:p] = new
+        sys.__egginsert = p + len(new)
+        """)
+
+
+if os.environ.get('SETUPTOOLS_SYS_PATH_TECHNIQUE', 'raw') == 'rewrite':
+    PthDistributions = RewritePthDistributions
+
+
+def _first_line_re():
+    """
+    Return a regular expression based on first_line_re suitable for matching
+    strings.
+    """
+    if isinstance(first_line_re.pattern, str):
+        return first_line_re
+
+    # first_line_re in Python >=3.1.4 and >=3.2.1 is a bytes pattern.
+    return re.compile(first_line_re.pattern.decode())
+
+
+def auto_chmod(func, arg, exc):
+    if func in [os.unlink, os.remove] and os.name == 'nt':
+        chmod(arg, stat.S_IWRITE)
+        return func(arg)
+    et, ev, _ = sys.exc_info()
+    six.reraise(et, (ev[0], ev[1] + (" %s %s" % (func, arg))))
+
+
+def update_dist_caches(dist_path, fix_zipimporter_caches):
+    """
+    Fix any globally cached `dist_path` related data
+
+    `dist_path` should be a path of a newly installed egg distribution (zipped
+    or unzipped).
+
+    sys.path_importer_cache contains finder objects that have been cached when
+    importing data from the original distribution. Any such finders need to be
+    cleared since the replacement distribution might be packaged differently,
+    e.g. a zipped egg distribution might get replaced with an unzipped egg
+    folder or vice versa. Having the old finders cached may then cause Python
+    to attempt loading modules from the replacement distribution using an
+    incorrect loader.
+
+    zipimport.zipimporter objects are Python loaders charged with importing
+    data packaged inside zip archives. If stale loaders referencing the
+    original distribution, are left behind, they can fail to load modules from
+    the replacement distribution. E.g. if an old zipimport.zipimporter instance
+    is used to load data from a new zipped egg archive, it may cause the
+    operation to attempt to locate the requested data in the wrong location -
+    one indicated by the original distribution's zip archive directory
+    information. Such an operation may then fail outright, e.g. report having
+    read a 'bad local file header', or even worse, it may fail silently &
+    return invalid data.
+
+    zipimport._zip_directory_cache contains cached zip archive directory
+    information for all existing zipimport.zipimporter instances and all such
+    instances connected to the same archive share the same cached directory
+    information.
+
+    If asked, and the underlying Python implementation allows it, we can fix
+    all existing zipimport.zipimporter instances instead of having to track
+    them down and remove them one by one, by updating their shared cached zip
+    archive directory information. This, of course, assumes that the
+    replacement distribution is packaged as a zipped egg.
+
+    If not asked to fix existing zipimport.zipimporter instances, we still do
+    our best to clear any remaining zipimport.zipimporter related cached data
+    that might somehow later get used when attempting to load data from the new
+    distribution and thus cause such load operations to fail. Note that when
+    tracking down such remaining stale data, we can not catch every conceivable
+    usage from here, and we clear only those that we know of and have found to
+    cause problems if left alive. Any remaining caches should be updated by
+    whomever is in charge of maintaining them, i.e. they should be ready to
+    handle us replacing their zip archives with new distributions at runtime.
+
+    """
+    # There are several other known sources of stale zipimport.zipimporter
+    # instances that we do not clear here, but might if ever given a reason to
+    # do so:
+    # * Global setuptools pkg_resources.working_set (a.k.a. 'master working
+    # set') may contain distributions which may in turn contain their
+    #   zipimport.zipimporter loaders.
+    # * Several zipimport.zipimporter loaders held by local variables further
+    #   up the function call stack when running the setuptools installation.
+    # * Already loaded modules may have their __loader__ attribute set to the
+    #   exact loader instance used when importing them. Python 3.4 docs state
+    #   that this information is intended mostly for introspection and so is
+    #   not expected to cause us problems.
+    normalized_path = normalize_path(dist_path)
+    _uncache(normalized_path, sys.path_importer_cache)
+    if fix_zipimporter_caches:
+        _replace_zip_directory_cache_data(normalized_path)
+    else:
+        # Here, even though we do not want to fix existing and now stale
+        # zipimporter cache information, we still want to remove it. Related to
+        # Python's zip archive directory information cache, we clear each of
+        # its stale entries in two phases:
+        #   1. Clear the entry so attempting to access zip archive information
+        #      via any existing stale zipimport.zipimporter instances fails.
+        #   2. Remove the entry from the cache so any newly constructed
+        #      zipimport.zipimporter instances do not end up using old stale
+        #      zip archive directory information.
+        # This whole stale data removal step does not seem strictly necessary,
+        # but has been left in because it was done before we started replacing
+        # the zip archive directory information cache content if possible, and
+        # there are no relevant unit tests that we can depend on to tell us if
+        # this is really needed.
+        _remove_and_clear_zip_directory_cache_data(normalized_path)
+
+
+def _collect_zipimporter_cache_entries(normalized_path, cache):
+    """
+    Return zipimporter cache entry keys related to a given normalized path.
+
+    Alternative path spellings (e.g. those using different character case or
+    those using alternative path separators) related to the same path are
+    included. Any sub-path entries are included as well, i.e. those
+    corresponding to zip archives embedded in other zip archives.
+
+    """
+    result = []
+    prefix_len = len(normalized_path)
+    for p in cache:
+        np = normalize_path(p)
+        if (np.startswith(normalized_path) and
+                np[prefix_len:prefix_len + 1] in (os.sep, '')):
+            result.append(p)
+    return result
+
+
+def _update_zipimporter_cache(normalized_path, cache, updater=None):
+    """
+    Update zipimporter cache data for a given normalized path.
+
+    Any sub-path entries are processed as well, i.e. those corresponding to zip
+    archives embedded in other zip archives.
+
+    Given updater is a callable taking a cache entry key and the original entry
+    (after already removing the entry from the cache), and expected to update
+    the entry and possibly return a new one to be inserted in its place.
+    Returning None indicates that the entry should not be replaced with a new
+    one. If no updater is given, the cache entries are simply removed without
+    any additional processing, the same as if the updater simply returned None.
+
+    """
+    for p in _collect_zipimporter_cache_entries(normalized_path, cache):
+        # N.B. pypy's custom zipimport._zip_directory_cache implementation does
+        # not support the complete dict interface:
+        # * Does not support item assignment, thus not allowing this function
+        #    to be used only for removing existing cache entries.
+        #  * Does not support the dict.pop() method, forcing us to use the
+        #    get/del patterns instead. For more detailed information see the
+        #    following links:
+        #      https://github.com/pypa/setuptools/issues/202#issuecomment-202913420
+        #      http://bit.ly/2h9itJX
+        old_entry = cache[p]
+        del cache[p]
+        new_entry = updater and updater(p, old_entry)
+        if new_entry is not None:
+            cache[p] = new_entry
+
+
+def _uncache(normalized_path, cache):
+    _update_zipimporter_cache(normalized_path, cache)
+
+
+def _remove_and_clear_zip_directory_cache_data(normalized_path):
+    def clear_and_remove_cached_zip_archive_directory_data(path, old_entry):
+        old_entry.clear()
+
+    _update_zipimporter_cache(
+        normalized_path, zipimport._zip_directory_cache,
+        updater=clear_and_remove_cached_zip_archive_directory_data)
+
+
+# PyPy Python implementation does not allow directly writing to the
+# zipimport._zip_directory_cache and so prevents us from attempting to correct
+# its content. The best we can do there is clear the problematic cache content
+# and have PyPy repopulate it as needed. The downside is that if there are any
+# stale zipimport.zipimporter instances laying around, attempting to use them
+# will fail due to not having its zip archive directory information available
+# instead of being automatically corrected to use the new correct zip archive
+# directory information.
+if '__pypy__' in sys.builtin_module_names:
+    _replace_zip_directory_cache_data = \
+        _remove_and_clear_zip_directory_cache_data
+else:
+
+    def _replace_zip_directory_cache_data(normalized_path):
+        def replace_cached_zip_archive_directory_data(path, old_entry):
+            # N.B. In theory, we could load the zip directory information just
+            # once for all updated path spellings, and then copy it locally and
+            # update its contained path strings to contain the correct
+            # spelling, but that seems like a way too invasive move (this cache
+            # structure is not officially documented anywhere and could in
+            # theory change with new Python releases) for no significant
+            # benefit.
+            old_entry.clear()
+            zipimport.zipimporter(path)
+            old_entry.update(zipimport._zip_directory_cache[path])
+            return old_entry
+
+        _update_zipimporter_cache(
+            normalized_path, zipimport._zip_directory_cache,
+            updater=replace_cached_zip_archive_directory_data)
+
+
+def is_python(text, filename='<string>'):
+    "Is this string a valid Python script?"
+    try:
+        compile(text, filename, 'exec')
+    except (SyntaxError, TypeError):
+        return False
+    else:
+        return True
+
+
+def is_sh(executable):
+    """Determine if the specified executable is a .sh (contains a #! line)"""
+    try:
+        with io.open(executable, encoding='latin-1') as fp:
+            magic = fp.read(2)
+    except (OSError, IOError):
+        return executable
+    return magic == '#!'
+
+
+def nt_quote_arg(arg):
+    """Quote a command line argument according to Windows parsing rules"""
+    return subprocess.list2cmdline([arg])
+
+
+def is_python_script(script_text, filename):
+    """Is this text, as a whole, a Python script? (as opposed to shell/bat/etc.
+    """
+    if filename.endswith('.py') or filename.endswith('.pyw'):
+        return True  # extension says it's Python
+    if is_python(script_text, filename):
+        return True  # it's syntactically valid Python
+    if script_text.startswith('#!'):
+        # It begins with a '#!' line, so check if 'python' is in it somewhere
+        return 'python' in script_text.splitlines()[0].lower()
+
+    return False  # Not any Python I can recognize
+
+
+try:
+    from os import chmod as _chmod
+except ImportError:
+    # Jython compatibility
+    def _chmod(*args):
+        pass
+
+
+def chmod(path, mode):
+    log.debug("changing mode of %s to %o", path, mode)
+    try:
+        _chmod(path, mode)
+    except os.error as e:
+        log.debug("chmod failed: %s", e)
+
+
+class CommandSpec(list):
+    """
+    A command spec for a #! header, specified as a list of arguments akin to
+    those passed to Popen.
+    """
+
+    options = []
+    split_args = dict()
+
+    @classmethod
+    def best(cls):
+        """
+        Choose the best CommandSpec class based on environmental conditions.
+        """
+        return cls
+
+    @classmethod
+    def _sys_executable(cls):
+        _default = os.path.normpath(sys.executable)
+        return os.environ.get('__PYVENV_LAUNCHER__', _default)
+
+    @classmethod
+    def from_param(cls, param):
+        """
+        Construct a CommandSpec from a parameter to build_scripts, which may
+        be None.
+        """
+        if isinstance(param, cls):
+            return param
+        if isinstance(param, list):
+            return cls(param)
+        if param is None:
+            return cls.from_environment()
+        # otherwise, assume it's a string.
+        return cls.from_string(param)
+
+    @classmethod
+    def from_environment(cls):
+        return cls([cls._sys_executable()])
+
+    @classmethod
+    def from_string(cls, string):
+        """
+        Construct a command spec from a simple string representing a command
+        line parseable by shlex.split.
+        """
+        items = shlex.split(string, **cls.split_args)
+        return cls(items)
+
+    def install_options(self, script_text):
+        self.options = shlex.split(self._extract_options(script_text))
+        cmdline = subprocess.list2cmdline(self)
+        if not isascii(cmdline):
+            self.options[:0] = ['-x']
+
+    @staticmethod
+    def _extract_options(orig_script):
+        """
+        Extract any options from the first line of the script.
+        """
+        first = (orig_script + '\n').splitlines()[0]
+        match = _first_line_re().match(first)
+        options = match.group(1) or '' if match else ''
+        return options.strip()
+
+    def as_header(self):
+        return self._render(self + list(self.options))
+
+    @staticmethod
+    def _strip_quotes(item):
+        _QUOTES = '"\''
+        for q in _QUOTES:
+            if item.startswith(q) and item.endswith(q):
+                return item[1:-1]
+        return item
+
+    @staticmethod
+    def _render(items):
+        cmdline = subprocess.list2cmdline(
+            CommandSpec._strip_quotes(item.strip()) for item in items)
+        return '#!' + cmdline + '\n'
+
+
+# For pbr compat; will be removed in a future version.
+sys_executable = CommandSpec._sys_executable()
+
+
+class WindowsCommandSpec(CommandSpec):
+    split_args = dict(posix=False)
+
+
+class ScriptWriter:
+    """
+    Encapsulates behavior around writing entry point scripts for console and
+    gui apps.
+    """
+
+    template = textwrap.dedent(r"""
+        # EASY-INSTALL-ENTRY-SCRIPT: %(spec)r,%(group)r,%(name)r
+        __requires__ = %(spec)r
+        import re
+        import sys
+        from pkg_resources import load_entry_point
+
+        if __name__ == '__main__':
+            sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
+            sys.exit(
+                load_entry_point(%(spec)r, %(group)r, %(name)r)()
+            )
+    """).lstrip()
+
+    command_spec_class = CommandSpec
+
+    @classmethod
+    def get_script_args(cls, dist, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_args", EasyInstallDeprecationWarning)
+        writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
+        header = cls.get_script_header("", executable, wininst)
+        return writer.get_args(dist, header)
+
+    @classmethod
+    def get_script_header(cls, script_text, executable=None, wininst=False):
+        # for backward compatibility
+        warnings.warn("Use get_header", EasyInstallDeprecationWarning, stacklevel=2)
+        if wininst:
+            executable = "python.exe"
+        return cls.get_header(script_text, executable)
+
+    @classmethod
+    def get_args(cls, dist, header=None):
+        """
+        Yield write_script() argument tuples for a distribution's
+        console_scripts and gui_scripts entry points.
+        """
+        if header is None:
+            header = cls.get_header()
+        spec = str(dist.as_requirement())
+        for type_ in 'console', 'gui':
+            group = type_ + '_scripts'
+            for name, ep in dist.get_entry_map(group).items():
+                cls._ensure_safe_name(name)
+                script_text = cls.template % locals()
+                args = cls._get_script_args(type_, name, header, script_text)
+                for res in args:
+                    yield res
+
+    @staticmethod
+    def _ensure_safe_name(name):
+        """
+        Prevent paths in *_scripts entry point names.
+        """
+        has_path_sep = re.search(r'[\\/]', name)
+        if has_path_sep:
+            raise ValueError("Path separators not allowed in script names")
+
+    @classmethod
+    def get_writer(cls, force_windows):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return WindowsScriptWriter.best() if force_windows else cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter for this environment.
+        """
+        if sys.platform == 'win32' or (os.name == 'java' and os._name == 'nt'):
+            return WindowsScriptWriter.best()
+        else:
+            return cls
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        # Simply write the stub with no extension.
+        yield (name, header + script_text)
+
+    @classmethod
+    def get_header(cls, script_text="", executable=None):
+        """Create a #! line, getting options (if any) from script_text"""
+        cmd = cls.command_spec_class.best().from_param(executable)
+        cmd.install_options(script_text)
+        return cmd.as_header()
+
+
+class WindowsScriptWriter(ScriptWriter):
+    command_spec_class = WindowsCommandSpec
+
+    @classmethod
+    def get_writer(cls):
+        # for backward compatibility
+        warnings.warn("Use best", EasyInstallDeprecationWarning)
+        return cls.best()
+
+    @classmethod
+    def best(cls):
+        """
+        Select the best ScriptWriter suitable for Windows
+        """
+        writer_lookup = dict(
+            executable=WindowsExecutableLauncherWriter,
+            natural=cls,
+        )
+        # for compatibility, use the executable launcher by default
+        launcher = os.environ.get('SETUPTOOLS_LAUNCHER', 'executable')
+        return writer_lookup[launcher]
+
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        "For Windows, add a .py extension"
+        ext = dict(console='.pya', gui='.pyw')[type_]
+        if ext not in os.environ['PATHEXT'].lower().split(';'):
+            msg = (
+                "{ext} not listed in PATHEXT; scripts will not be "
+                "recognized as executables."
+            ).format(**locals())
+            warnings.warn(msg, UserWarning)
+        old = ['.pya', '.py', '-script.py', '.pyc', '.pyo', '.pyw', '.exe']
+        old.remove(ext)
+        header = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield name + ext, header + script_text, 't', blockers
+
+    @classmethod
+    def _adjust_header(cls, type_, orig_header):
+        """
+        Make sure 'pythonw' is used for gui and and 'python' is used for
+        console (regardless of what sys.executable is).
+        """
+        pattern = 'pythonw.exe'
+        repl = 'python.exe'
+        if type_ == 'gui':
+            pattern, repl = repl, pattern
+        pattern_ob = re.compile(re.escape(pattern), re.IGNORECASE)
+        new_header = pattern_ob.sub(string=orig_header, repl=repl)
+        return new_header if cls._use_header(new_header) else orig_header
+
+    @staticmethod
+    def _use_header(new_header):
+        """
+        Should _adjust_header use the replaced header?
+
+        On non-windows systems, always use. On
+        Windows systems, only use the replaced header if it resolves
+        to an executable on the system.
+        """
+        clean_header = new_header[2:-1].strip('"')
+        return sys.platform != 'win32' or find_executable(clean_header)
+
+
+class WindowsExecutableLauncherWriter(WindowsScriptWriter):
+    @classmethod
+    def _get_script_args(cls, type_, name, header, script_text):
+        """
+        For Windows, add a .py extension and an .exe launcher
+        """
+        if type_ == 'gui':
+            launcher_type = 'gui'
+            ext = '-script.pyw'
+            old = ['.pyw']
+        else:
+            launcher_type = 'cli'
+            ext = '-script.py'
+            old = ['.py', '.pyc', '.pyo']
+        hdr = cls._adjust_header(type_, header)
+        blockers = [name + x for x in old]
+        yield (name + ext, hdr + script_text, 't', blockers)
+        yield (
+            name + '.exe', get_win_launcher(launcher_type),
+            'b'  # write in binary mode
+        )
+        if not is_64bit():
+            # install a manifest for the launcher to prevent Windows
+            # from detecting it as an installer (which it will for
+            #  launchers like easy_install.exe). Consider only
+            #  adding a manifest for launchers detected as installers.
+            #  See Distribute #143 for details.
+            m_name = name + '.exe.manifest'
+            yield (m_name, load_launcher_manifest(name), 't')
+
+
+# for backward-compatibility
+get_script_args = ScriptWriter.get_script_args
+get_script_header = ScriptWriter.get_script_header
+
+
+def get_win_launcher(type):
+    """
+    Load the Windows launcher (executable) suitable for launching a script.
+
+    `type` should be either 'cli' or 'gui'
+
+    Returns the executable as a byte string.
+    """
+    launcher_fn = '%s.exe' % type
+    if is_64bit():
+        launcher_fn = launcher_fn.replace(".", "-64.")
+    else:
+        launcher_fn = launcher_fn.replace(".", "-32.")
+    return resource_string('setuptools', launcher_fn)
+
+
+def load_launcher_manifest(name):
+    manifest = pkg_resources.resource_string(__name__, 'launcher manifest.xml')
+    if six.PY2:
+        return manifest % vars()
+    else:
+        return manifest.decode('utf-8') % vars()
+
+
+def rmtree(path, ignore_errors=False, onerror=auto_chmod):
+    return shutil.rmtree(path, ignore_errors, onerror)
+
+
+def current_umask():
+    tmp = os.umask(0o022)
+    os.umask(tmp)
+    return tmp
+
+
+def bootstrap():
+    # This function is called when setuptools*.egg is run using /bin/sh
+    import setuptools
+
+    argv0 = os.path.dirname(setuptools.__path__[0])
+    sys.argv[0] = argv0
+    sys.argv.append(argv0)
+    main()
+
+
+def main(argv=None, **kw):
+    from setuptools import setup
+    from setuptools.dist import Distribution
+
+    class DistributionWithoutHelpCommands(Distribution):
+        common_usage = ""
+
+        def _show_help(self, *args, **kw):
+            with _patch_usage():
+                Distribution._show_help(self, *args, **kw)
+
+    if argv is None:
+        argv = sys.argv[1:]
+
+    with _patch_usage():
+        setup(
+            script_args=['-q', 'easy_install', '-v'] + argv,
+            script_name=sys.argv[0] or 'easy_install',
+            distclass=DistributionWithoutHelpCommands,
+            **kw
+        )
+
+
+@contextlib.contextmanager
+def _patch_usage():
+    import distutils.core
+    USAGE = textwrap.dedent("""
+        usage: %(script)s [options] requirement_or_url ...
+           or: %(script)s --help
+        """).lstrip()
+
+    def gen_usage(script_name):
+        return USAGE % dict(
+            script=os.path.basename(script_name),
+        )
+
+    saved = distutils.core.gen_usage
+    distutils.core.gen_usage = gen_usage
+    try:
+        yield
+    finally:
+        distutils.core.gen_usage = saved
+
+class EasyInstallDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in EasyInstall in SetupTools. Not ignored by default, unlike DeprecationWarning."""
+    
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/egg_info.py b/venv/lib/python3.9/site-packages/setuptools/command/egg_info.py
new file mode 100644
index 0000000..13714d6
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/egg_info.py
@@ -0,0 +1,717 @@
+"""setuptools.command.egg_info
+
+Create a distribution's .egg-info directory and contents"""
+
+from distutils.filelist import FileList as _FileList
+from distutils.errors import DistutilsInternalError
+from distutils.util import convert_path
+from distutils import log
+import distutils.errors
+import distutils.filelist
+import os
+import re
+import sys
+import io
+import warnings
+import time
+import collections
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map
+
+from setuptools import Command
+from setuptools.command.sdist import sdist
+from setuptools.command.sdist import walk_revctrl
+from setuptools.command.setopt import edit_config
+from setuptools.command import bdist_egg
+from pkg_resources import (
+    parse_requirements, safe_name, parse_version,
+    safe_version, yield_lines, EntryPoint, iter_entry_points, to_filename)
+import setuptools.unicode_utils as unicode_utils
+from setuptools.glob import glob
+
+from setuptools.extern import packaging
+from setuptools import SetuptoolsDeprecationWarning
+
+def translate_pattern(glob):
+    """
+    Translate a file path glob like '*.txt' in to a regular expression.
+    This differs from fnmatch.translate which allows wildcards to match
+    directory separators. It also knows about '**/' which matches any number of
+    directories.
+    """
+    pat = ''
+
+    # This will split on '/' within [character classes]. This is deliberate.
+    chunks = glob.split(os.path.sep)
+
+    sep = re.escape(os.sep)
+    valid_char = '[^%s]' % (sep,)
+
+    for c, chunk in enumerate(chunks):
+        last_chunk = c == len(chunks) - 1
+
+        # Chunks that are a literal ** are globstars. They match anything.
+        if chunk == '**':
+            if last_chunk:
+                # Match anything if this is the last component
+                pat += '.*'
+            else:
+                # Match '(name/)*'
+                pat += '(?:%s+%s)*' % (valid_char, sep)
+            continue  # Break here as the whole path component has been handled
+
+        # Find any special characters in the remainder
+        i = 0
+        chunk_len = len(chunk)
+        while i < chunk_len:
+            char = chunk[i]
+            if char == '*':
+                # Match any number of name characters
+                pat += valid_char + '*'
+            elif char == '?':
+                # Match a name character
+                pat += valid_char
+            elif char == '[':
+                # Character class
+                inner_i = i + 1
+                # Skip initial !/] chars
+                if inner_i < chunk_len and chunk[inner_i] == '!':
+                    inner_i = inner_i + 1
+                if inner_i < chunk_len and chunk[inner_i] == ']':
+                    inner_i = inner_i + 1
+
+                # Loop till the closing ] is found
+                while inner_i < chunk_len and chunk[inner_i] != ']':
+                    inner_i = inner_i + 1
+
+                if inner_i >= chunk_len:
+                    # Got to the end of the string without finding a closing ]
+                    # Do not treat this as a matching group, but as a literal [
+                    pat += re.escape(char)
+                else:
+                    # Grab the insides of the [brackets]
+                    inner = chunk[i + 1:inner_i]
+                    char_class = ''
+
+                    # Class negation
+                    if inner[0] == '!':
+                        char_class = '^'
+                        inner = inner[1:]
+
+                    char_class += re.escape(inner)
+                    pat += '[%s]' % (char_class,)
+
+                    # Skip to the end ]
+                    i = inner_i
+            else:
+                pat += re.escape(char)
+            i += 1
+
+        # Join each chunk with the dir separator
+        if not last_chunk:
+            pat += sep
+
+    pat += r'\Z'
+    return re.compile(pat, flags=re.MULTILINE|re.DOTALL)
+
+
+class InfoCommon:
+    tag_build = None
+    tag_date = None
+
+    @property
+    def name(self):
+        return safe_name(self.distribution.get_name())
+
+    def tagged_version(self):
+        version = self.distribution.get_version()
+        # egg_info may be called more than once for a distribution,
+        # in which case the version string already contains all tags.
+        if self.vtags and version.endswith(self.vtags):
+            return safe_version(version)
+        return safe_version(version + self.vtags)
+
+    def tags(self):
+        version = ''
+        if self.tag_build:
+            version += self.tag_build
+        if self.tag_date:
+            version += time.strftime("-%Y%m%d")
+        return version
+    vtags = property(tags)
+
+
+class egg_info(InfoCommon, Command):
+    description = "create a distribution's .egg-info directory"
+
+    user_options = [
+        ('egg-base=', 'e', "directory containing .egg-info directories"
+                           " (default: top of the source tree)"),
+        ('tag-date', 'd', "Add date stamp (e.g. 20050528) to version number"),
+        ('tag-build=', 'b', "Specify explicit tag to add to version number"),
+        ('no-date', 'D', "Don't include date stamp [default]"),
+    ]
+
+    boolean_options = ['tag-date']
+    negative_opt = {
+        'no-date': 'tag-date',
+    }
+
+    def initialize_options(self):
+        self.egg_base = None
+        self.egg_name = None
+        self.egg_info = None
+        self.egg_version = None
+        self.broken_egg_info = False
+
+    ####################################
+    # allow the 'tag_svn_revision' to be detected and
+    # set, supporting sdists built on older Setuptools.
+    @property
+    def tag_svn_revision(self):
+        pass
+
+    @tag_svn_revision.setter
+    def tag_svn_revision(self, value):
+        pass
+    ####################################
+
+    def save_version_info(self, filename):
+        """
+        Materialize the value of date into the
+        build tag. Install build keys in a deterministic order
+        to avoid arbitrary reordering on subsequent builds.
+        """
+        egg_info = collections.OrderedDict()
+        # follow the order these keys would have been added
+        # when PYTHONHASHSEED=0
+        egg_info['tag_build'] = self.tags()
+        egg_info['tag_date'] = 0
+        edit_config(filename, dict(egg_info=egg_info))
+
+    def finalize_options(self):
+        # Note: we need to capture the current value returned
+        # by `self.tagged_version()`, so we can later update
+        # `self.distribution.metadata.version` without
+        # repercussions.
+        self.egg_name = self.name
+        self.egg_version = self.tagged_version()
+        parsed_version = parse_version(self.egg_version)
+
+        try:
+            is_version = isinstance(parsed_version, packaging.version.Version)
+            spec = (
+                "%s==%s" if is_version else "%s===%s"
+            )
+            list(
+                parse_requirements(spec % (self.egg_name, self.egg_version))
+            )
+        except ValueError:
+            raise distutils.errors.DistutilsOptionError(
+                "Invalid distribution name or version syntax: %s-%s" %
+                (self.egg_name, self.egg_version)
+            )
+
+        if self.egg_base is None:
+            dirs = self.distribution.package_dir
+            self.egg_base = (dirs or {}).get('', os.curdir)
+
+        self.ensure_dirname('egg_base')
+        self.egg_info = to_filename(self.egg_name) + '.egg-info'
+        if self.egg_base != os.curdir:
+            self.egg_info = os.path.join(self.egg_base, self.egg_info)
+        if '-' in self.egg_name:
+            self.check_broken_egg_info()
+
+        # Set package version for the benefit of dumber commands
+        # (e.g. sdist, bdist_wininst, etc.)
+        #
+        self.distribution.metadata.version = self.egg_version
+
+        # If we bootstrapped around the lack of a PKG-INFO, as might be the
+        # case in a fresh checkout, make sure that any special tags get added
+        # to the version info
+        #
+        pd = self.distribution._patched_dist
+        if pd is not None and pd.key == self.egg_name.lower():
+            pd._version = self.egg_version
+            pd._parsed_version = parse_version(self.egg_version)
+            self.distribution._patched_dist = None
+
+    def write_or_delete_file(self, what, filename, data, force=False):
+        """Write `data` to `filename` or delete if empty
+
+        If `data` is non-empty, this routine is the same as ``write_file()``.
+        If `data` is empty but not ``None``, this is the same as calling
+        ``delete_file(filename)`.  If `data` is ``None``, then this is a no-op
+        unless `filename` exists, in which case a warning is issued about the
+        orphaned file (if `force` is false), or deleted (if `force` is true).
+        """
+        if data:
+            self.write_file(what, filename, data)
+        elif os.path.exists(filename):
+            if data is None and not force:
+                log.warn(
+                    "%s not set in setup(), but %s exists", what, filename
+                )
+                return
+            else:
+                self.delete_file(filename)
+
+    def write_file(self, what, filename, data):
+        """Write `data` to `filename` (if not a dry run) after announcing it
+
+        `what` is used in a log message to identify what is being written
+        to the file.
+        """
+        log.info("writing %s to %s", what, filename)
+        if not six.PY2:
+            data = data.encode("utf-8")
+        if not self.dry_run:
+            f = open(filename, 'wb')
+            f.write(data)
+            f.close()
+
+    def delete_file(self, filename):
+        """Delete `filename` (if not a dry run) after announcing it"""
+        log.info("deleting %s", filename)
+        if not self.dry_run:
+            os.unlink(filename)
+
+    def run(self):
+        self.mkpath(self.egg_info)
+        os.utime(self.egg_info, None)
+        installer = self.distribution.fetch_build_egg
+        for ep in iter_entry_points('egg_info.writers'):
+            ep.require(installer=installer)
+            writer = ep.resolve()
+            writer(self, ep.name, os.path.join(self.egg_info, ep.name))
+
+        # Get rid of native_libs.txt if it was put there by older bdist_egg
+        nl = os.path.join(self.egg_info, "native_libs.txt")
+        if os.path.exists(nl):
+            self.delete_file(nl)
+
+        self.find_sources()
+
+    def find_sources(self):
+        """Generate SOURCES.txt manifest file"""
+        manifest_filename = os.path.join(self.egg_info, "SOURCES.txt")
+        mm = manifest_maker(self.distribution)
+        mm.manifest = manifest_filename
+        mm.run()
+        self.filelist = mm.filelist
+
+    def check_broken_egg_info(self):
+        bei = self.egg_name + '.egg-info'
+        if self.egg_base != os.curdir:
+            bei = os.path.join(self.egg_base, bei)
+        if os.path.exists(bei):
+            log.warn(
+                "-" * 78 + '\n'
+                "Note: Your current .egg-info directory has a '-' in its name;"
+                '\nthis will not work correctly with "setup.py develop".\n\n'
+                'Please rename %s to %s to correct this problem.\n' + '-' * 78,
+                bei, self.egg_info
+            )
+            self.broken_egg_info = self.egg_info
+            self.egg_info = bei  # make it work for now
+
+
+class FileList(_FileList):
+    # Implementations of the various MANIFEST.in commands
+
+    def process_template_line(self, line):
+        # Parse the line: split it up, make sure the right number of words
+        # is there, and return the relevant words.  'action' is always
+        # defined: it's the first word of the line.  Which of the other
+        # three are defined depends on the action; it'll be either
+        # patterns, (dir and patterns), or (dir_pattern).
+        (action, patterns, dir, dir_pattern) = self._parse_template_line(line)
+
+        # OK, now we know that the action is valid and we have the
+        # right number of words on the line for that action -- so we
+        # can proceed with minimal error-checking.
+        if action == 'include':
+            self.debug_print("include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.include(pattern):
+                    log.warn("warning: no files found matching '%s'", pattern)
+
+        elif action == 'exclude':
+            self.debug_print("exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.exclude(pattern):
+                    log.warn(("warning: no previously-included files "
+                              "found matching '%s'"), pattern)
+
+        elif action == 'global-include':
+            self.debug_print("global-include " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_include(pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "anywhere in distribution"), pattern)
+
+        elif action == 'global-exclude':
+            self.debug_print("global-exclude " + ' '.join(patterns))
+            for pattern in patterns:
+                if not self.global_exclude(pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found anywhere in distribution"),
+                             pattern)
+
+        elif action == 'recursive-include':
+            self.debug_print("recursive-include %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_include(dir, pattern):
+                    log.warn(("warning: no files found matching '%s' "
+                              "under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'recursive-exclude':
+            self.debug_print("recursive-exclude %s %s" %
+                             (dir, ' '.join(patterns)))
+            for pattern in patterns:
+                if not self.recursive_exclude(dir, pattern):
+                    log.warn(("warning: no previously-included files matching "
+                              "'%s' found under directory '%s'"),
+                             pattern, dir)
+
+        elif action == 'graft':
+            self.debug_print("graft " + dir_pattern)
+            if not self.graft(dir_pattern):
+                log.warn("warning: no directories found matching '%s'",
+                         dir_pattern)
+
+        elif action == 'prune':
+            self.debug_print("prune " + dir_pattern)
+            if not self.prune(dir_pattern):
+                log.warn(("no previously-included directories found "
+                          "matching '%s'"), dir_pattern)
+
+        else:
+            raise DistutilsInternalError(
+                "this cannot happen: invalid action '%s'" % action)
+
+    def _remove_files(self, predicate):
+        """
+        Remove all files from the file list that match the predicate.
+        Return True if any matching files were removed
+        """
+        found = False
+        for i in range(len(self.files) - 1, -1, -1):
+            if predicate(self.files[i]):
+                self.debug_print(" removing " + self.files[i])
+                del self.files[i]
+                found = True
+        return found
+
+    def include(self, pattern):
+        """Include files that match 'pattern'."""
+        found = [f for f in glob(pattern) if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def exclude(self, pattern):
+        """Exclude files that match 'pattern'."""
+        match = translate_pattern(pattern)
+        return self._remove_files(match.match)
+
+    def recursive_include(self, dir, pattern):
+        """
+        Include all files anywhere in 'dir/' that match the pattern.
+        """
+        full_pattern = os.path.join(dir, '**', pattern)
+        found = [f for f in glob(full_pattern, recursive=True)
+                 if not os.path.isdir(f)]
+        self.extend(found)
+        return bool(found)
+
+    def recursive_exclude(self, dir, pattern):
+        """
+        Exclude any file anywhere in 'dir/' that match the pattern.
+        """
+        match = translate_pattern(os.path.join(dir, '**', pattern))
+        return self._remove_files(match.match)
+
+    def graft(self, dir):
+        """Include all files from 'dir/'."""
+        found = [
+            item
+            for match_dir in glob(dir)
+            for item in distutils.filelist.findall(match_dir)
+        ]
+        self.extend(found)
+        return bool(found)
+
+    def prune(self, dir):
+        """Filter out files from 'dir/'."""
+        match = translate_pattern(os.path.join(dir, '**'))
+        return self._remove_files(match.match)
+
+    def global_include(self, pattern):
+        """
+        Include all files anywhere in the current directory that match the
+        pattern. This is very inefficient on large file trees.
+        """
+        if self.allfiles is None:
+            self.findall()
+        match = translate_pattern(os.path.join('**', pattern))
+        found = [f for f in self.allfiles if match.match(f)]
+        self.extend(found)
+        return bool(found)
+
+    def global_exclude(self, pattern):
+        """
+        Exclude all files anywhere that match the pattern.
+        """
+        match = translate_pattern(os.path.join('**', pattern))
+        return self._remove_files(match.match)
+
+    def append(self, item):
+        if item.endswith('\r'):  # Fix older sdists built on Windows
+            item = item[:-1]
+        path = convert_path(item)
+
+        if self._safe_path(path):
+            self.files.append(path)
+
+    def extend(self, paths):
+        self.files.extend(filter(self._safe_path, paths))
+
+    def _repair(self):
+        """
+        Replace self.files with only safe paths
+
+        Because some owners of FileList manipulate the underlying
+        ``files`` attribute directly, this method must be called to
+        repair those paths.
+        """
+        self.files = list(filter(self._safe_path, self.files))
+
+    def _safe_path(self, path):
+        enc_warn = "'%s' not %s encodable -- skipping"
+
+        # To avoid accidental trans-codings errors, first to unicode
+        u_path = unicode_utils.filesys_decode(path)
+        if u_path is None:
+            log.warn("'%s' in unexpected encoding -- skipping" % path)
+            return False
+
+        # Must ensure utf-8 encodability
+        utf8_path = unicode_utils.try_encode(u_path, "utf-8")
+        if utf8_path is None:
+            log.warn(enc_warn, path, 'utf-8')
+            return False
+
+        try:
+            # accept is either way checks out
+            if os.path.exists(u_path) or os.path.exists(utf8_path):
+                return True
+        # this will catch any encode errors decoding u_path
+        except UnicodeEncodeError:
+            log.warn(enc_warn, path, sys.getfilesystemencoding())
+
+
+class manifest_maker(sdist):
+    template = "MANIFEST.in"
+
+    def initialize_options(self):
+        self.use_defaults = 1
+        self.prune = 1
+        self.manifest_only = 1
+        self.force_manifest = 1
+
+    def finalize_options(self):
+        pass
+
+    def run(self):
+        self.filelist = FileList()
+        if not os.path.exists(self.manifest):
+            self.write_manifest()  # it must exist so it'll get in the list
+        self.add_defaults()
+        if os.path.exists(self.template):
+            self.read_template()
+        self.prune_file_list()
+        self.filelist.sort()
+        self.filelist.remove_duplicates()
+        self.write_manifest()
+
+    def _manifest_normalize(self, path):
+        path = unicode_utils.filesys_decode(path)
+        return path.replace(os.sep, '/')
+
+    def write_manifest(self):
+        """
+        Write the file list in 'self.filelist' to the manifest file
+        named by 'self.manifest'.
+        """
+        self.filelist._repair()
+
+        # Now _repairs should encodability, but not unicode
+        files = [self._manifest_normalize(f) for f in self.filelist.files]
+        msg = "writing manifest file '%s'" % self.manifest
+        self.execute(write_file, (self.manifest, files), msg)
+
+    def warn(self, msg):
+        if not self._should_suppress_warning(msg):
+            sdist.warn(self, msg)
+
+    @staticmethod
+    def _should_suppress_warning(msg):
+        """
+        suppress missing-file warnings from sdist
+        """
+        return re.match(r"standard file .*not found", msg)
+
+    def add_defaults(self):
+        sdist.add_defaults(self)
+        self.check_license()
+        self.filelist.append(self.template)
+        self.filelist.append(self.manifest)
+        rcfiles = list(walk_revctrl())
+        if rcfiles:
+            self.filelist.extend(rcfiles)
+        elif os.path.exists(self.manifest):
+            self.read_manifest()
+
+        if os.path.exists("setup.py"):
+            # setup.py should be included by default, even if it's not
+            # the script called to create the sdist
+            self.filelist.append("setup.py")
+
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist.graft(ei_cmd.egg_info)
+
+    def prune_file_list(self):
+        build = self.get_finalized_command('build')
+        base_dir = self.distribution.get_fullname()
+        self.filelist.prune(build.build_base)
+        self.filelist.prune(base_dir)
+        sep = re.escape(os.sep)
+        self.filelist.exclude_pattern(r'(^|' + sep + r')(RCS|CVS|\.svn)' + sep,
+                                      is_regex=1)
+
+
+def write_file(filename, contents):
+    """Create a file with the specified name and write 'contents' (a
+    sequence of strings without line terminators) to it.
+    """
+    contents = "\n".join(contents)
+
+    # assuming the contents has been vetted for utf-8 encoding
+    contents = contents.encode("utf-8")
+
+    with open(filename, "wb") as f:  # always write POSIX-style manifest
+        f.write(contents)
+
+
+def write_pkg_info(cmd, basename, filename):
+    log.info("writing %s", filename)
+    if not cmd.dry_run:
+        metadata = cmd.distribution.metadata
+        metadata.version, oldver = cmd.egg_version, metadata.version
+        metadata.name, oldname = cmd.egg_name, metadata.name
+
+        try:
+            # write unescaped data to PKG-INFO, so older pkg_resources
+            # can still parse it
+            metadata.write_pkg_info(cmd.egg_info)
+        finally:
+            metadata.name, metadata.version = oldname, oldver
+
+        safe = getattr(cmd.distribution, 'zip_safe', None)
+
+        bdist_egg.write_safety_flag(cmd.egg_info, safe)
+
+
+def warn_depends_obsolete(cmd, basename, filename):
+    if os.path.exists(filename):
+        log.warn(
+            "WARNING: 'depends.txt' is not used by setuptools 0.6!\n"
+            "Use the install_requires/extras_require setup() args instead."
+        )
+
+
+def _write_requirements(stream, reqs):
+    lines = yield_lines(reqs or ())
+    append_cr = lambda line: line + '\n'
+    lines = map(append_cr, sorted(lines))
+    stream.writelines(lines)
+
+
+def write_requirements(cmd, basename, filename):
+    dist = cmd.distribution
+    data = six.StringIO()
+    _write_requirements(data, dist.install_requires)
+    extras_require = dist.extras_require or {}
+    for extra in sorted(extras_require):
+        data.write('\n[{extra}]\n'.format(**vars()))
+        _write_requirements(data, extras_require[extra])
+    cmd.write_or_delete_file("requirements", filename, data.getvalue())
+
+
+def write_setup_requirements(cmd, basename, filename):
+    data = io.StringIO()
+    _write_requirements(data, cmd.distribution.setup_requires)
+    cmd.write_or_delete_file("setup-requirements", filename, data.getvalue())
+
+
+def write_toplevel_names(cmd, basename, filename):
+    pkgs = dict.fromkeys(
+        [
+            k.split('.', 1)[0]
+            for k in cmd.distribution.iter_distribution_names()
+        ]
+    )
+    cmd.write_file("top-level names", filename, '\n'.join(sorted(pkgs)) + '\n')
+
+
+def overwrite_arg(cmd, basename, filename):
+    write_arg(cmd, basename, filename, True)
+
+
+def write_arg(cmd, basename, filename, force=False):
+    argname = os.path.splitext(basename)[0]
+    value = getattr(cmd.distribution, argname, None)
+    if value is not None:
+        value = '\n'.join(value) + '\n'
+    cmd.write_or_delete_file(argname, filename, value, force)
+
+
+def write_entries(cmd, basename, filename):
+    ep = cmd.distribution.entry_points
+
+    if isinstance(ep, six.string_types) or ep is None:
+        data = ep
+    elif ep is not None:
+        data = []
+        for section, contents in sorted(ep.items()):
+            if not isinstance(contents, six.string_types):
+                contents = EntryPoint.parse_group(section, contents)
+                contents = '\n'.join(sorted(map(str, contents.values())))
+            data.append('[%s]\n%s\n\n' % (section, contents))
+        data = ''.join(data)
+
+    cmd.write_or_delete_file('entry points', filename, data, True)
+
+
+def get_pkg_info_revision():
+    """
+    Get a -r### off of PKG-INFO Version in case this is an sdist of
+    a subversion revision.
+    """
+    warnings.warn("get_pkg_info_revision is deprecated.", EggInfoDeprecationWarning)
+    if os.path.exists('PKG-INFO'):
+        with io.open('PKG-INFO') as f:
+            for line in f:
+                match = re.match(r"Version:.*-r(\d+)\s*$", line)
+                if match:
+                    return int(match.group(1))
+    return 0
+
+
+class EggInfoDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in eggInfo in setupTools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/install.py b/venv/lib/python3.9/site-packages/setuptools/command/install.py
new file mode 100644
index 0000000..72b9a3e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/install.py
@@ -0,0 +1,125 @@
+from distutils.errors import DistutilsArgError
+import inspect
+import glob
+import warnings
+import platform
+import distutils.command.install as orig
+
+import setuptools
+
+# Prior to numpy 1.9, NumPy relies on the '_install' name, so provide it for
+# now. See https://github.com/pypa/setuptools/issues/199/
+_install = orig.install
+
+
+class install(orig.install):
+    """Use easy_install to install the package, w/dependencies"""
+
+    user_options = orig.install.user_options + [
+        ('old-and-unmanageable', None, "Try not to use this!"),
+        ('single-version-externally-managed', None,
+         "used by system package builders to create 'flat' eggs"),
+    ]
+    boolean_options = orig.install.boolean_options + [
+        'old-and-unmanageable', 'single-version-externally-managed',
+    ]
+    new_commands = [
+        ('install_egg_info', lambda self: True),
+        ('install_scripts', lambda self: True),
+    ]
+    _nc = dict(new_commands)
+
+    def initialize_options(self):
+        orig.install.initialize_options(self)
+        self.old_and_unmanageable = None
+        self.single_version_externally_managed = None
+
+    def finalize_options(self):
+        orig.install.finalize_options(self)
+        if self.root:
+            self.single_version_externally_managed = True
+        elif self.single_version_externally_managed:
+            if not self.root and not self.record:
+                raise DistutilsArgError(
+                    "You must specify --record or --root when building system"
+                    " packages"
+                )
+
+    def handle_extra_path(self):
+        if self.root or self.single_version_externally_managed:
+            # explicit backward-compatibility mode, allow extra_path to work
+            return orig.install.handle_extra_path(self)
+
+        # Ignore extra_path when installing an egg (or being run by another
+        # command without --root or --single-version-externally-managed
+        self.path_file = None
+        self.extra_dirs = ''
+
+    def run(self):
+        # Explicit request for old-style install?  Just do it
+        if self.old_and_unmanageable or self.single_version_externally_managed:
+            return orig.install.run(self)
+
+        if not self._called_from_setup(inspect.currentframe()):
+            # Run in backward-compatibility mode to support bdist_* commands.
+            orig.install.run(self)
+        else:
+            self.do_egg_install()
+
+    @staticmethod
+    def _called_from_setup(run_frame):
+        """
+        Attempt to detect whether run() was called from setup() or by another
+        command.  If called by setup(), the parent caller will be the
+        'run_command' method in 'distutils.dist', and *its* caller will be
+        the 'run_commands' method.  If called any other way, the
+        immediate caller *might* be 'run_command', but it won't have been
+        called by 'run_commands'. Return True in that case or if a call stack
+        is unavailable. Return False otherwise.
+        """
+        if run_frame is None:
+            msg = "Call stack not available. bdist_* commands may fail."
+            warnings.warn(msg)
+            if platform.python_implementation() == 'IronPython':
+                msg = "For best results, pass -X:Frames to enable call stack."
+                warnings.warn(msg)
+            return True
+        res = inspect.getouterframes(run_frame)[2]
+        caller, = res[:1]
+        info = inspect.getframeinfo(caller)
+        caller_module = caller.f_globals.get('__name__', '')
+        return (
+            caller_module == 'distutils.dist'
+            and info.function == 'run_commands'
+        )
+
+    def do_egg_install(self):
+
+        easy_install = self.distribution.get_command_class('easy_install')
+
+        cmd = easy_install(
+            self.distribution, args="x", root=self.root, record=self.record,
+        )
+        cmd.ensure_finalized()  # finalize before bdist_egg munges install cmd
+        cmd.always_copy_from = '.'  # make sure local-dir eggs get installed
+
+        # pick up setup-dir .egg files only: no .egg-info
+        cmd.package_index.scan(glob.glob('*.egg'))
+
+        self.run_command('bdist_egg')
+        args = [self.distribution.get_command_obj('bdist_egg').egg_output]
+
+        if setuptools.bootstrap_install_from:
+            # Bootstrap self-installation of setuptools
+            args.insert(0, setuptools.bootstrap_install_from)
+
+        cmd.args = args
+        cmd.run(show_deprecation=False)
+        setuptools.bootstrap_install_from = None
+
+
+# XXX Python 3.1 doesn't see _nc if this is inside the class
+install.sub_commands = (
+    [cmd for cmd in orig.install.sub_commands if cmd[0] not in install._nc] +
+    install.new_commands
+)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/install_egg_info.py b/venv/lib/python3.9/site-packages/setuptools/command/install_egg_info.py
new file mode 100644
index 0000000..5f405bc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/install_egg_info.py
@@ -0,0 +1,82 @@
+from distutils import log, dir_util
+import os, sys
+
+from setuptools import Command
+from setuptools import namespaces
+from setuptools.archive_util import unpack_archive
+import pkg_resources
+
+
+class install_egg_info(namespaces.Installer, Command):
+    """Install an .egg-info directory for the package"""
+
+    description = "Install an .egg-info directory for the package"
+
+    user_options = [
+        ('install-dir=', 'd', "directory to install to"),
+    ]
+
+    def initialize_options(self):
+        self.install_dir = None
+        self.install_layout = None
+        self.prefix_option = None
+
+    def finalize_options(self):
+        self.set_undefined_options('install_lib',
+                                   ('install_dir', 'install_dir'))
+        self.set_undefined_options('install',('install_layout','install_layout'))
+        if sys.hexversion > 0x2060000:
+            self.set_undefined_options('install',('prefix_option','prefix_option'))
+        ei_cmd = self.get_finalized_command("egg_info")
+        basename = pkg_resources.Distribution(
+            None, None, ei_cmd.egg_name, ei_cmd.egg_version
+        ).egg_name() + '.egg-info'
+
+        if self.install_layout:
+            if not self.install_layout.lower() in ['deb']:
+                raise DistutilsOptionError("unknown value for --install-layout")
+            self.install_layout = self.install_layout.lower()
+            basename = basename.replace('-py%s' % pkg_resources.PY_MAJOR, '')
+        elif self.prefix_option or 'real_prefix' in sys.__dict__:
+            # don't modify for virtualenv
+            pass
+        else:
+            basename = basename.replace('-py%s' % pkg_resources.PY_MAJOR, '')
+
+        self.source = ei_cmd.egg_info
+        self.target = os.path.join(self.install_dir, basename)
+        self.outputs = []
+
+    def run(self):
+        self.run_command('egg_info')
+        if os.path.isdir(self.target) and not os.path.islink(self.target):
+            dir_util.remove_tree(self.target, dry_run=self.dry_run)
+        elif os.path.exists(self.target):
+            self.execute(os.unlink, (self.target,), "Removing " + self.target)
+        if not self.dry_run:
+            pkg_resources.ensure_directory(self.target)
+        self.execute(
+            self.copytree, (), "Copying %s to %s" % (self.source, self.target)
+        )
+        self.install_namespaces()
+
+    def get_outputs(self):
+        return self.outputs
+
+    def copytree(self):
+        # Copy the .egg-info tree to site-packages
+        def skimmer(src, dst):
+            # filter out source-control directories; note that 'src' is always
+            # a '/'-separated path, regardless of platform.  'dst' is a
+            # platform-specific path.
+            for skip in '.svn/', 'CVS/':
+                if src.startswith(skip) or '/' + skip in src:
+                    return None
+            if self.install_layout and self.install_layout in ['deb'] and src.startswith('SOURCES.txt'):
+                log.info("Skipping SOURCES.txt")
+                return None
+            self.outputs.append(dst)
+            log.debug("Copying %s to %s", src, dst)
+            return dst
+
+        unpack_archive(self.source, self.target, skimmer)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/install_lib.py b/venv/lib/python3.9/site-packages/setuptools/command/install_lib.py
new file mode 100644
index 0000000..bf81519
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/install_lib.py
@@ -0,0 +1,147 @@
+import os
+import sys
+from itertools import product, starmap
+import distutils.command.install_lib as orig
+
+
+class install_lib(orig.install_lib):
+    """Don't add compiled flags to filenames of non-Python files"""
+
+    def initialize_options(self):
+        orig.install_lib.initialize_options(self)
+        self.multiarch = None
+        self.install_layout = None
+
+    def finalize_options(self):
+        orig.install_lib.finalize_options(self)
+        self.set_undefined_options('install',('install_layout','install_layout'))
+        if self.install_layout == 'deb' and sys.version_info[:2] >= (3, 3):
+            import sysconfig
+            self.multiarch = sysconfig.get_config_var('MULTIARCH')
+
+    def run(self):
+        self.build()
+        outfiles = self.install()
+        if outfiles is not None:
+            # always compile, in case we have any extension stubs to deal with
+            self.byte_compile(outfiles)
+
+    def get_exclusions(self):
+        """
+        Return a collections.Sized collections.Container of paths to be
+        excluded for single_version_externally_managed installations.
+        """
+        all_packages = (
+            pkg
+            for ns_pkg in self._get_SVEM_NSPs()
+            for pkg in self._all_packages(ns_pkg)
+        )
+
+        excl_specs = product(all_packages, self._gen_exclusion_paths())
+        return set(starmap(self._exclude_pkg_path, excl_specs))
+
+    def _exclude_pkg_path(self, pkg, exclusion_path):
+        """
+        Given a package name and exclusion path within that package,
+        compute the full exclusion path.
+        """
+        parts = pkg.split('.') + [exclusion_path]
+        return os.path.join(self.install_dir, *parts)
+
+    @staticmethod
+    def _all_packages(pkg_name):
+        """
+        >>> list(install_lib._all_packages('foo.bar.baz'))
+        ['foo.bar.baz', 'foo.bar', 'foo']
+        """
+        while pkg_name:
+            yield pkg_name
+            pkg_name, sep, child = pkg_name.rpartition('.')
+
+    def _get_SVEM_NSPs(self):
+        """
+        Get namespace packages (list) but only for
+        single_version_externally_managed installations and empty otherwise.
+        """
+        # TODO: is it necessary to short-circuit here? i.e. what's the cost
+        # if get_finalized_command is called even when namespace_packages is
+        # False?
+        if not self.distribution.namespace_packages:
+            return []
+
+        install_cmd = self.get_finalized_command('install')
+        svem = install_cmd.single_version_externally_managed
+
+        return self.distribution.namespace_packages if svem else []
+
+    @staticmethod
+    def _gen_exclusion_paths():
+        """
+        Generate file paths to be excluded for namespace packages (bytecode
+        cache files).
+        """
+        # always exclude the package module itself
+        yield '__init__.py'
+
+        yield '__init__.pyc'
+        yield '__init__.pyo'
+
+        if not hasattr(sys, 'implementation'):
+            return
+
+        base = os.path.join('__pycache__', '__init__.' + sys.implementation.cache_tag)
+        yield base + '.pyc'
+        yield base + '.pyo'
+        yield base + '.opt-1.pyc'
+        yield base + '.opt-2.pyc'
+
+    def copy_tree(
+            self, infile, outfile,
+            preserve_mode=1, preserve_times=1, preserve_symlinks=0, level=1
+    ):
+        assert preserve_mode and preserve_times and not preserve_symlinks
+        exclude = self.get_exclusions()
+
+        if not exclude:
+            import distutils.dir_util
+            distutils.dir_util._multiarch = self.multiarch
+            return orig.install_lib.copy_tree(self, infile, outfile)
+
+        # Exclude namespace package __init__.py* files from the output
+
+        from setuptools.archive_util import unpack_directory
+        from distutils import log
+
+        outfiles = []
+
+        if self.multiarch:
+            import sysconfig
+            ext_suffix = sysconfig.get_config_var ('EXT_SUFFIX')
+            if ext_suffix.endswith(self.multiarch + ext_suffix[-3:]):
+                new_suffix = None
+            else:
+                new_suffix = "%s-%s%s" % (ext_suffix[:-3], self.multiarch, ext_suffix[-3:])
+
+        def pf(src, dst):
+            if dst in exclude:
+                log.warn("Skipping installation of %s (namespace package)",
+                         dst)
+                return False
+
+            if self.multiarch and new_suffix and dst.endswith(ext_suffix) and not dst.endswith(new_suffix):
+                dst = dst.replace(ext_suffix, new_suffix)
+                log.info("renaming extension to %s", os.path.basename(dst))
+
+            log.info("copying %s -> %s", src, os.path.dirname(dst))
+            outfiles.append(dst)
+            return dst
+
+        unpack_directory(infile, outfile, pf)
+        return outfiles
+
+    def get_outputs(self):
+        outputs = orig.install_lib.get_outputs(self)
+        exclude = self.get_exclusions()
+        if exclude:
+            return [f for f in outputs if f not in exclude]
+        return outputs
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/install_scripts.py b/venv/lib/python3.9/site-packages/setuptools/command/install_scripts.py
new file mode 100644
index 0000000..1623427
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/install_scripts.py
@@ -0,0 +1,65 @@
+from distutils import log
+import distutils.command.install_scripts as orig
+import os
+import sys
+
+from pkg_resources import Distribution, PathMetadata, ensure_directory
+
+
+class install_scripts(orig.install_scripts):
+    """Do normal script install, plus any egg_info wrapper scripts"""
+
+    def initialize_options(self):
+        orig.install_scripts.initialize_options(self)
+        self.no_ep = False
+
+    def run(self):
+        import setuptools.command.easy_install as ei
+
+        self.run_command("egg_info")
+        if self.distribution.scripts:
+            orig.install_scripts.run(self)  # run first to set up self.outfiles
+        else:
+            self.outfiles = []
+        if self.no_ep:
+            # don't install entry point scripts into .egg file!
+            return
+
+        ei_cmd = self.get_finalized_command("egg_info")
+        dist = Distribution(
+            ei_cmd.egg_base, PathMetadata(ei_cmd.egg_base, ei_cmd.egg_info),
+            ei_cmd.egg_name, ei_cmd.egg_version,
+        )
+        bs_cmd = self.get_finalized_command('build_scripts')
+        exec_param = getattr(bs_cmd, 'executable', None)
+        bw_cmd = self.get_finalized_command("bdist_wininst")
+        is_wininst = getattr(bw_cmd, '_is_running', False)
+        writer = ei.ScriptWriter
+        if is_wininst:
+            exec_param = "python.exe"
+            writer = ei.WindowsScriptWriter
+        if exec_param == sys.executable:
+            # In case the path to the Python executable contains a space, wrap
+            # it so it's not split up.
+            exec_param = [exec_param]
+        # resolve the writer to the environment
+        writer = writer.best()
+        cmd = writer.command_spec_class.best().from_param(exec_param)
+        for args in writer.get_args(dist, cmd.as_header()):
+            self.write_script(*args)
+
+    def write_script(self, script_name, contents, mode="t", *ignored):
+        """Write an executable file to the scripts directory"""
+        from setuptools.command.easy_install import chmod, current_umask
+
+        log.info("Installing %s script to %s", script_name, self.install_dir)
+        target = os.path.join(self.install_dir, script_name)
+        self.outfiles.append(target)
+
+        mask = current_umask()
+        if not self.dry_run:
+            ensure_directory(target)
+            f = open(target, "w" + mode)
+            f.write(contents)
+            f.close()
+            chmod(target, 0o777 - mask)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/launcher manifest.xml b/venv/lib/python3.9/site-packages/setuptools/command/launcher manifest.xml
new file mode 100644
index 0000000..5972a96
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/launcher manifest.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+    <assemblyIdentity version="1.0.0.0"
+                      processorArchitecture="X86"
+                      name="%(name)s"
+                      type="win32"/>
+    <!-- Identify the application security requirements. -->
+    <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+        <security>
+            <requestedPrivileges>
+                <requestedExecutionLevel level="asInvoker" uiAccess="false"/>
+            </requestedPrivileges>
+        </security>
+    </trustInfo>
+</assembly>
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/py36compat.py b/venv/lib/python3.9/site-packages/setuptools/command/py36compat.py
new file mode 100644
index 0000000..61063e7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/py36compat.py
@@ -0,0 +1,136 @@
+import os
+from glob import glob
+from distutils.util import convert_path
+from distutils.command import sdist
+
+from setuptools.extern.six.moves import filter
+
+
+class sdist_add_defaults:
+    """
+    Mix-in providing forward-compatibility for functionality as found in
+    distutils on Python 3.7.
+
+    Do not edit the code in this class except to update functionality
+    as implemented in distutils. Instead, override in the subclass.
+    """
+
+    def add_defaults(self):
+        """Add all the default files to self.filelist:
+          - README or README.txt
+          - setup.py
+          - test/test*.py
+          - all pure Python modules mentioned in setup script
+          - all files pointed by package_data (build_py)
+          - all files defined in data_files.
+          - all files defined as scripts.
+          - all C sources listed as part of extensions or C libraries
+            in the setup script (doesn't catch C headers!)
+        Warns if (README or README.txt) or setup.py are missing; everything
+        else is optional.
+        """
+        self._add_defaults_standards()
+        self._add_defaults_optional()
+        self._add_defaults_python()
+        self._add_defaults_data_files()
+        self._add_defaults_ext()
+        self._add_defaults_c_libs()
+        self._add_defaults_scripts()
+
+    @staticmethod
+    def _cs_path_exists(fspath):
+        """
+        Case-sensitive path existence check
+
+        >>> sdist_add_defaults._cs_path_exists(__file__)
+        True
+        >>> sdist_add_defaults._cs_path_exists(__file__.upper())
+        False
+        """
+        if not os.path.exists(fspath):
+            return False
+        # make absolute so we always have a directory
+        abspath = os.path.abspath(fspath)
+        directory, filename = os.path.split(abspath)
+        return filename in os.listdir(directory)
+
+    def _add_defaults_standards(self):
+        standards = [self.READMES, self.distribution.script_name]
+        for fn in standards:
+            if isinstance(fn, tuple):
+                alts = fn
+                got_it = False
+                for fn in alts:
+                    if self._cs_path_exists(fn):
+                        got_it = True
+                        self.filelist.append(fn)
+                        break
+
+                if not got_it:
+                    self.warn("standard file not found: should have one of " +
+                              ', '.join(alts))
+            else:
+                if self._cs_path_exists(fn):
+                    self.filelist.append(fn)
+                else:
+                    self.warn("standard file '%s' not found" % fn)
+
+    def _add_defaults_optional(self):
+        optional = ['test/test*.py', 'setup.cfg']
+        for pattern in optional:
+            files = filter(os.path.isfile, glob(pattern))
+            self.filelist.extend(files)
+
+    def _add_defaults_python(self):
+        # build_py is used to get:
+        #  - python modules
+        #  - files defined in package_data
+        build_py = self.get_finalized_command('build_py')
+
+        # getting python files
+        if self.distribution.has_pure_modules():
+            self.filelist.extend(build_py.get_source_files())
+
+        # getting package_data files
+        # (computed in build_py.data_files by build_py.finalize_options)
+        for pkg, src_dir, build_dir, filenames in build_py.data_files:
+            for filename in filenames:
+                self.filelist.append(os.path.join(src_dir, filename))
+
+    def _add_defaults_data_files(self):
+        # getting distribution.data_files
+        if self.distribution.has_data_files():
+            for item in self.distribution.data_files:
+                if isinstance(item, str):
+                    # plain file
+                    item = convert_path(item)
+                    if os.path.isfile(item):
+                        self.filelist.append(item)
+                else:
+                    # a (dirname, filenames) tuple
+                    dirname, filenames = item
+                    for f in filenames:
+                        f = convert_path(f)
+                        if os.path.isfile(f):
+                            self.filelist.append(f)
+
+    def _add_defaults_ext(self):
+        if self.distribution.has_ext_modules():
+            build_ext = self.get_finalized_command('build_ext')
+            self.filelist.extend(build_ext.get_source_files())
+
+    def _add_defaults_c_libs(self):
+        if self.distribution.has_c_libraries():
+            build_clib = self.get_finalized_command('build_clib')
+            self.filelist.extend(build_clib.get_source_files())
+
+    def _add_defaults_scripts(self):
+        if self.distribution.has_scripts():
+            build_scripts = self.get_finalized_command('build_scripts')
+            self.filelist.extend(build_scripts.get_source_files())
+
+
+if hasattr(sdist.sdist, '_add_defaults_standards'):
+    # disable the functionality already available upstream
+    class sdist_add_defaults:
+        pass
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/register.py b/venv/lib/python3.9/site-packages/setuptools/command/register.py
new file mode 100644
index 0000000..b8266b9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/register.py
@@ -0,0 +1,18 @@
+from distutils import log
+import distutils.command.register as orig
+
+from setuptools.errors import RemovedCommandError
+
+
+class register(orig.register):
+    """Formerly used to register packages on PyPI."""
+
+    def run(self):
+        msg = (
+            "The register command has been removed, use twine to upload "
+            + "instead (https://pypi.org/p/twine)"
+        )
+
+        self.announce("ERROR: " + msg, log.ERROR)
+
+        raise RemovedCommandError(msg)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/rotate.py b/venv/lib/python3.9/site-packages/setuptools/command/rotate.py
new file mode 100644
index 0000000..b89353f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/rotate.py
@@ -0,0 +1,66 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import shutil
+
+from setuptools.extern import six
+
+from setuptools import Command
+
+
+class rotate(Command):
+    """Delete older distributions"""
+
+    description = "delete older distributions, keeping N newest files"
+    user_options = [
+        ('match=', 'm', "patterns to match (required)"),
+        ('dist-dir=', 'd', "directory where the distributions are"),
+        ('keep=', 'k', "number of matching distributions to keep"),
+    ]
+
+    boolean_options = []
+
+    def initialize_options(self):
+        self.match = None
+        self.dist_dir = None
+        self.keep = None
+
+    def finalize_options(self):
+        if self.match is None:
+            raise DistutilsOptionError(
+                "Must specify one or more (comma-separated) match patterns "
+                "(e.g. '.zip' or '.egg')"
+            )
+        if self.keep is None:
+            raise DistutilsOptionError("Must specify number of files to keep")
+        try:
+            self.keep = int(self.keep)
+        except ValueError:
+            raise DistutilsOptionError("--keep must be an integer")
+        if isinstance(self.match, six.string_types):
+            self.match = [
+                convert_path(p.strip()) for p in self.match.split(',')
+            ]
+        self.set_undefined_options('bdist', ('dist_dir', 'dist_dir'))
+
+    def run(self):
+        self.run_command("egg_info")
+        from glob import glob
+
+        for pattern in self.match:
+            pattern = self.distribution.get_name() + '*' + pattern
+            files = glob(os.path.join(self.dist_dir, pattern))
+            files = [(os.path.getmtime(f), f) for f in files]
+            files.sort()
+            files.reverse()
+
+            log.info("%d file(s) matching %s", len(files), pattern)
+            files = files[self.keep:]
+            for (t, f) in files:
+                log.info("Deleting %s", f)
+                if not self.dry_run:
+                    if os.path.isdir(f):
+                        shutil.rmtree(f)
+                    else:
+                        os.unlink(f)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/saveopts.py b/venv/lib/python3.9/site-packages/setuptools/command/saveopts.py
new file mode 100644
index 0000000..611cec5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/saveopts.py
@@ -0,0 +1,22 @@
+from setuptools.command.setopt import edit_config, option_base
+
+
+class saveopts(option_base):
+    """Save command-line options to a file"""
+
+    description = "save supplied options to setup.cfg or other config file"
+
+    def run(self):
+        dist = self.distribution
+        settings = {}
+
+        for cmd in dist.command_options:
+
+            if cmd == 'saveopts':
+                continue  # don't save our own options!
+
+            for opt, (src, val) in dist.get_option_dict(cmd).items():
+                if src == "command line":
+                    settings.setdefault(cmd, {})[opt] = val
+
+        edit_config(self.filename, settings, self.dry_run)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/sdist.py b/venv/lib/python3.9/site-packages/setuptools/command/sdist.py
new file mode 100644
index 0000000..8c3438e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/sdist.py
@@ -0,0 +1,252 @@
+from distutils import log
+import distutils.command.sdist as orig
+import os
+import sys
+import io
+import contextlib
+
+from setuptools.extern import six, ordered_set
+
+from .py36compat import sdist_add_defaults
+
+import pkg_resources
+
+_default_revctrl = list
+
+
+def walk_revctrl(dirname=''):
+    """Find all files under revision control"""
+    for ep in pkg_resources.iter_entry_points('setuptools.file_finders'):
+        for item in ep.load()(dirname):
+            yield item
+
+
+class sdist(sdist_add_defaults, orig.sdist):
+    """Smart sdist that finds anything supported by revision control"""
+
+    user_options = [
+        ('formats=', None,
+         "formats for source distribution (comma-separated list)"),
+        ('keep-temp', 'k',
+         "keep the distribution tree around after creating " +
+         "archive file(s)"),
+        ('dist-dir=', 'd',
+         "directory to put the source distribution archive(s) in "
+         "[default: dist]"),
+    ]
+
+    negative_opt = {}
+
+    README_EXTENSIONS = ['', '.rst', '.txt', '.md']
+    READMES = tuple('README{0}'.format(ext) for ext in README_EXTENSIONS)
+
+    def run(self):
+        self.run_command('egg_info')
+        ei_cmd = self.get_finalized_command('egg_info')
+        self.filelist = ei_cmd.filelist
+        self.filelist.append(os.path.join(ei_cmd.egg_info, 'SOURCES.txt'))
+        self.check_readme()
+
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        self.make_distribution()
+
+        dist_files = getattr(self.distribution, 'dist_files', [])
+        for file in self.archive_files:
+            data = ('sdist', '', file)
+            if data not in dist_files:
+                dist_files.append(data)
+
+    def initialize_options(self):
+        orig.sdist.initialize_options(self)
+
+        self._default_to_gztar()
+
+    def _default_to_gztar(self):
+        # only needed on Python prior to 3.6.
+        if sys.version_info >= (3, 6, 0, 'beta', 1):
+            return
+        self.formats = ['gztar']
+
+    def make_distribution(self):
+        """
+        Workaround for #516
+        """
+        with self._remove_os_link():
+            orig.sdist.make_distribution(self)
+
+    @staticmethod
+    @contextlib.contextmanager
+    def _remove_os_link():
+        """
+        In a context, remove and restore os.link if it exists
+        """
+
+        class NoValue:
+            pass
+
+        orig_val = getattr(os, 'link', NoValue)
+        try:
+            del os.link
+        except Exception:
+            pass
+        try:
+            yield
+        finally:
+            if orig_val is not NoValue:
+                setattr(os, 'link', orig_val)
+
+    def __read_template_hack(self):
+        # This grody hack closes the template file (MANIFEST.in) if an
+        #  exception occurs during read_template.
+        # Doing so prevents an error when easy_install attempts to delete the
+        #  file.
+        try:
+            orig.sdist.read_template(self)
+        except Exception:
+            _, _, tb = sys.exc_info()
+            tb.tb_next.tb_frame.f_locals['template'].close()
+            raise
+
+    # Beginning with Python 2.7.2, 3.1.4, and 3.2.1, this leaky file handle
+    #  has been fixed, so only override the method if we're using an earlier
+    #  Python.
+    has_leaky_handle = (
+        sys.version_info < (2, 7, 2)
+        or (3, 0) <= sys.version_info < (3, 1, 4)
+        or (3, 2) <= sys.version_info < (3, 2, 1)
+    )
+    if has_leaky_handle:
+        read_template = __read_template_hack
+
+    def _add_defaults_optional(self):
+        if six.PY2:
+            sdist_add_defaults._add_defaults_optional(self)
+        else:
+            super()._add_defaults_optional()
+        if os.path.isfile('pyproject.toml'):
+            self.filelist.append('pyproject.toml')
+
+    def _add_defaults_python(self):
+        """getting python files"""
+        if self.distribution.has_pure_modules():
+            build_py = self.get_finalized_command('build_py')
+            self.filelist.extend(build_py.get_source_files())
+            self._add_data_files(self._safe_data_files(build_py))
+
+    def _safe_data_files(self, build_py):
+        """
+        Extracting data_files from build_py is known to cause
+        infinite recursion errors when `include_package_data`
+        is enabled, so suppress it in that case.
+        """
+        if self.distribution.include_package_data:
+            return ()
+        return build_py.data_files
+
+    def _add_data_files(self, data_files):
+        """
+        Add data files as found in build_py.data_files.
+        """
+        self.filelist.extend(
+            os.path.join(src_dir, name)
+            for _, src_dir, _, filenames in data_files
+            for name in filenames
+        )
+
+    def _add_defaults_data_files(self):
+        try:
+            if six.PY2:
+                sdist_add_defaults._add_defaults_data_files(self)
+            else:
+                super()._add_defaults_data_files()
+        except TypeError:
+            log.warn("data_files contains unexpected objects")
+
+    def check_readme(self):
+        for f in self.READMES:
+            if os.path.exists(f):
+                return
+        else:
+            self.warn(
+                "standard file not found: should have one of " +
+                ', '.join(self.READMES)
+            )
+
+    def make_release_tree(self, base_dir, files):
+        orig.sdist.make_release_tree(self, base_dir, files)
+
+        # Save any egg_info command line options used to create this sdist
+        dest = os.path.join(base_dir, 'setup.cfg')
+        if hasattr(os, 'link') and os.path.exists(dest):
+            # unlink and re-copy, since it might be hard-linked, and
+            # we don't want to change the source version
+            os.unlink(dest)
+            self.copy_file('setup.cfg', dest)
+
+        self.get_finalized_command('egg_info').save_version_info(dest)
+
+    def _manifest_is_not_generated(self):
+        # check for special comment used in 2.7.1 and higher
+        if not os.path.isfile(self.manifest):
+            return False
+
+        with io.open(self.manifest, 'rb') as fp:
+            first_line = fp.readline()
+        return (first_line !=
+                '# file GENERATED by distutils, do NOT edit\n'.encode())
+
+    def read_manifest(self):
+        """Read the manifest file (named by 'self.manifest') and use it to
+        fill in 'self.filelist', the list of files to include in the source
+        distribution.
+        """
+        log.info("reading manifest file '%s'", self.manifest)
+        manifest = open(self.manifest, 'rb')
+        for line in manifest:
+            # The manifest must contain UTF-8. See #303.
+            if not six.PY2:
+                try:
+                    line = line.decode('UTF-8')
+                except UnicodeDecodeError:
+                    log.warn("%r not UTF-8 decodable -- skipping" % line)
+                    continue
+            # ignore comments and blank lines
+            line = line.strip()
+            if line.startswith('#') or not line:
+                continue
+            self.filelist.append(line)
+        manifest.close()
+
+    def check_license(self):
+        """Checks if license_file' or 'license_files' is configured and adds any
+        valid paths to 'self.filelist'.
+        """
+
+        files = ordered_set.OrderedSet()
+
+        opts = self.distribution.get_option_dict('metadata')
+
+        # ignore the source of the value
+        _, license_file = opts.get('license_file', (None, None))
+
+        if license_file is None:
+            log.debug("'license_file' option was not specified")
+        else:
+            files.add(license_file)
+
+        try:
+            files.update(self.distribution.metadata.license_files)
+        except TypeError:
+            log.warn("warning: 'license_files' option is malformed")
+
+        for f in files:
+            if not os.path.exists(f):
+                log.warn(
+                    "warning: Failed to find the configured license file '%s'",
+                    f)
+                files.remove(f)
+
+        self.filelist.extend(files)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/setopt.py b/venv/lib/python3.9/site-packages/setuptools/command/setopt.py
new file mode 100644
index 0000000..7e57cc0
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/setopt.py
@@ -0,0 +1,149 @@
+from distutils.util import convert_path
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import distutils
+import os
+
+from setuptools.extern.six.moves import configparser
+
+from setuptools import Command
+
+__all__ = ['config_file', 'edit_config', 'option_base', 'setopt']
+
+
+def config_file(kind="local"):
+    """Get the filename of the distutils, local, global, or per-user config
+
+    `kind` must be one of "local", "global", or "user"
+    """
+    if kind == 'local':
+        return 'setup.cfg'
+    if kind == 'global':
+        return os.path.join(
+            os.path.dirname(distutils.__file__), 'distutils.cfg'
+        )
+    if kind == 'user':
+        dot = os.name == 'posix' and '.' or ''
+        return os.path.expanduser(convert_path("~/%spydistutils.cfg" % dot))
+    raise ValueError(
+        "config_file() type must be 'local', 'global', or 'user'", kind
+    )
+
+
+def edit_config(filename, settings, dry_run=False):
+    """Edit a configuration file to include `settings`
+
+    `settings` is a dictionary of dictionaries or ``None`` values, keyed by
+    command/section name.  A ``None`` value means to delete the entire section,
+    while a dictionary lists settings to be changed or deleted in that section.
+    A setting of ``None`` means to delete that setting.
+    """
+    log.debug("Reading configuration from %s", filename)
+    opts = configparser.RawConfigParser()
+    opts.read([filename])
+    for section, options in settings.items():
+        if options is None:
+            log.info("Deleting section [%s] from %s", section, filename)
+            opts.remove_section(section)
+        else:
+            if not opts.has_section(section):
+                log.debug("Adding new section [%s] to %s", section, filename)
+                opts.add_section(section)
+            for option, value in options.items():
+                if value is None:
+                    log.debug(
+                        "Deleting %s.%s from %s",
+                        section, option, filename
+                    )
+                    opts.remove_option(section, option)
+                    if not opts.options(section):
+                        log.info("Deleting empty [%s] section from %s",
+                                 section, filename)
+                        opts.remove_section(section)
+                else:
+                    log.debug(
+                        "Setting %s.%s to %r in %s",
+                        section, option, value, filename
+                    )
+                    opts.set(section, option, value)
+
+    log.info("Writing %s", filename)
+    if not dry_run:
+        with open(filename, 'w') as f:
+            opts.write(f)
+
+
+class option_base(Command):
+    """Abstract base class for commands that mess with config files"""
+
+    user_options = [
+        ('global-config', 'g',
+         "save options to the site-wide distutils.cfg file"),
+        ('user-config', 'u',
+         "save options to the current user's pydistutils.cfg file"),
+        ('filename=', 'f',
+         "configuration file to use (default=setup.cfg)"),
+    ]
+
+    boolean_options = [
+        'global-config', 'user-config',
+    ]
+
+    def initialize_options(self):
+        self.global_config = None
+        self.user_config = None
+        self.filename = None
+
+    def finalize_options(self):
+        filenames = []
+        if self.global_config:
+            filenames.append(config_file('global'))
+        if self.user_config:
+            filenames.append(config_file('user'))
+        if self.filename is not None:
+            filenames.append(self.filename)
+        if not filenames:
+            filenames.append(config_file('local'))
+        if len(filenames) > 1:
+            raise DistutilsOptionError(
+                "Must specify only one configuration file option",
+                filenames
+            )
+        self.filename, = filenames
+
+
+class setopt(option_base):
+    """Save command-line options to a file"""
+
+    description = "set an option in setup.cfg or another config file"
+
+    user_options = [
+        ('command=', 'c', 'command to set an option for'),
+        ('option=', 'o', 'option to set'),
+        ('set-value=', 's', 'value of the option'),
+        ('remove', 'r', 'remove (unset) the value'),
+    ] + option_base.user_options
+
+    boolean_options = option_base.boolean_options + ['remove']
+
+    def initialize_options(self):
+        option_base.initialize_options(self)
+        self.command = None
+        self.option = None
+        self.set_value = None
+        self.remove = None
+
+    def finalize_options(self):
+        option_base.finalize_options(self)
+        if self.command is None or self.option is None:
+            raise DistutilsOptionError("Must specify --command *and* --option")
+        if self.set_value is None and not self.remove:
+            raise DistutilsOptionError("Must specify --set-value or --remove")
+
+    def run(self):
+        edit_config(
+            self.filename, {
+                self.command: {self.option.replace('-', '_'): self.set_value}
+            },
+            self.dry_run
+        )
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/test.py b/venv/lib/python3.9/site-packages/setuptools/command/test.py
new file mode 100644
index 0000000..f6470e9
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/test.py
@@ -0,0 +1,279 @@
+import os
+import operator
+import sys
+import contextlib
+import itertools
+import unittest
+from distutils.errors import DistutilsError, DistutilsOptionError
+from distutils import log
+from unittest import TestLoader
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import map, filter
+
+from pkg_resources import (resource_listdir, resource_exists, normalize_path,
+                           working_set, _namespace_packages, evaluate_marker,
+                           add_activation_listener, require, EntryPoint)
+from setuptools import Command
+from .build_py import _unique_everseen
+
+__metaclass__ = type
+
+
+class ScanningLoader(TestLoader):
+
+    def __init__(self):
+        TestLoader.__init__(self)
+        self._visited = set()
+
+    def loadTestsFromModule(self, module, pattern=None):
+        """Return a suite of all tests cases contained in the given module
+
+        If the module is a package, load tests from all the modules in it.
+        If the module has an ``additional_tests`` function, call it and add
+        the return value to the tests.
+        """
+        if module in self._visited:
+            return None
+        self._visited.add(module)
+
+        tests = []
+        tests.append(TestLoader.loadTestsFromModule(self, module))
+
+        if hasattr(module, "additional_tests"):
+            tests.append(module.additional_tests())
+
+        if hasattr(module, '__path__'):
+            for file in resource_listdir(module.__name__, ''):
+                if file.endswith('.py') and file != '__init__.py':
+                    submodule = module.__name__ + '.' + file[:-3]
+                else:
+                    if resource_exists(module.__name__, file + '/__init__.py'):
+                        submodule = module.__name__ + '.' + file
+                    else:
+                        continue
+                tests.append(self.loadTestsFromName(submodule))
+
+        if len(tests) != 1:
+            return self.suiteClass(tests)
+        else:
+            return tests[0]  # don't create a nested suite for only one return
+
+
+# adapted from jaraco.classes.properties:NonDataProperty
+class NonDataProperty:
+    def __init__(self, fget):
+        self.fget = fget
+
+    def __get__(self, obj, objtype=None):
+        if obj is None:
+            return self
+        return self.fget(obj)
+
+
+class test(Command):
+    """Command to run unit tests after in-place build"""
+
+    description = "run unit tests after in-place build (deprecated)"
+
+    user_options = [
+        ('test-module=', 'm', "Run 'test_suite' in specified module"),
+        ('test-suite=', 's',
+         "Run single test, case or suite (e.g. 'module.test_suite')"),
+        ('test-runner=', 'r', "Test runner to use"),
+    ]
+
+    def initialize_options(self):
+        self.test_suite = None
+        self.test_module = None
+        self.test_loader = None
+        self.test_runner = None
+
+    def finalize_options(self):
+
+        if self.test_suite and self.test_module:
+            msg = "You may specify a module or a suite, but not both"
+            raise DistutilsOptionError(msg)
+
+        if self.test_suite is None:
+            if self.test_module is None:
+                self.test_suite = self.distribution.test_suite
+            else:
+                self.test_suite = self.test_module + ".test_suite"
+
+        if self.test_loader is None:
+            self.test_loader = getattr(self.distribution, 'test_loader', None)
+        if self.test_loader is None:
+            self.test_loader = "setuptools.command.test:ScanningLoader"
+        if self.test_runner is None:
+            self.test_runner = getattr(self.distribution, 'test_runner', None)
+
+    @NonDataProperty
+    def test_args(self):
+        return list(self._test_args())
+
+    def _test_args(self):
+        if not self.test_suite and sys.version_info >= (2, 7):
+            yield 'discover'
+        if self.verbose:
+            yield '--verbose'
+        if self.test_suite:
+            yield self.test_suite
+
+    def with_project_on_sys_path(self, func):
+        """
+        Backward compatibility for project_on_sys_path context.
+        """
+        with self.project_on_sys_path():
+            func()
+
+    @contextlib.contextmanager
+    def project_on_sys_path(self, include_dists=[]):
+        with_2to3 = not six.PY2 and getattr(self.distribution, 'use_2to3', False)
+
+        if with_2to3:
+            # If we run 2to3 we can not do this inplace:
+
+            # Ensure metadata is up-to-date
+            self.reinitialize_command('build_py', inplace=0)
+            self.run_command('build_py')
+            bpy_cmd = self.get_finalized_command("build_py")
+            build_path = normalize_path(bpy_cmd.build_lib)
+
+            # Build extensions
+            self.reinitialize_command('egg_info', egg_base=build_path)
+            self.run_command('egg_info')
+
+            self.reinitialize_command('build_ext', inplace=0)
+            self.run_command('build_ext')
+        else:
+            # Without 2to3 inplace works fine:
+            self.run_command('egg_info')
+
+            # Build extensions in-place
+            self.reinitialize_command('build_ext', inplace=1)
+            self.run_command('build_ext')
+
+        ei_cmd = self.get_finalized_command("egg_info")
+
+        old_path = sys.path[:]
+        old_modules = sys.modules.copy()
+
+        try:
+            project_path = normalize_path(ei_cmd.egg_base)
+            sys.path.insert(0, project_path)
+            working_set.__init__()
+            add_activation_listener(lambda dist: dist.activate())
+            require('%s==%s' % (ei_cmd.egg_name, ei_cmd.egg_version))
+            with self.paths_on_pythonpath([project_path]):
+                yield
+        finally:
+            sys.path[:] = old_path
+            sys.modules.clear()
+            sys.modules.update(old_modules)
+            working_set.__init__()
+
+    @staticmethod
+    @contextlib.contextmanager
+    def paths_on_pythonpath(paths):
+        """
+        Add the indicated paths to the head of the PYTHONPATH environment
+        variable so that subprocesses will also see the packages at
+        these paths.
+
+        Do this in a context that restores the value on exit.
+        """
+        nothing = object()
+        orig_pythonpath = os.environ.get('PYTHONPATH', nothing)
+        current_pythonpath = os.environ.get('PYTHONPATH', '')
+        try:
+            prefix = os.pathsep.join(_unique_everseen(paths))
+            to_join = filter(None, [prefix, current_pythonpath])
+            new_path = os.pathsep.join(to_join)
+            if new_path:
+                os.environ['PYTHONPATH'] = new_path
+            yield
+        finally:
+            if orig_pythonpath is nothing:
+                os.environ.pop('PYTHONPATH', None)
+            else:
+                os.environ['PYTHONPATH'] = orig_pythonpath
+
+    @staticmethod
+    def install_dists(dist):
+        """
+        Install the requirements indicated by self.distribution and
+        return an iterable of the dists that were built.
+        """
+        ir_d = dist.fetch_build_eggs(dist.install_requires)
+        tr_d = dist.fetch_build_eggs(dist.tests_require or [])
+        er_d = dist.fetch_build_eggs(
+            v for k, v in dist.extras_require.items()
+            if k.startswith(':') and evaluate_marker(k[1:])
+        )
+        return itertools.chain(ir_d, tr_d, er_d)
+
+    def run(self):
+        self.announce(
+            "WARNING: Testing via this command is deprecated and will be "
+            "removed in a future version. Users looking for a generic test "
+            "entry point independent of test runner are encouraged to use "
+            "tox.",
+            log.WARN,
+        )
+
+        installed_dists = self.install_dists(self.distribution)
+
+        cmd = ' '.join(self._argv)
+        if self.dry_run:
+            self.announce('skipping "%s" (dry run)' % cmd)
+            return
+
+        self.announce('running "%s"' % cmd)
+
+        paths = map(operator.attrgetter('location'), installed_dists)
+        with self.paths_on_pythonpath(paths):
+            with self.project_on_sys_path():
+                self.run_tests()
+
+    def run_tests(self):
+        # Purge modules under test from sys.modules. The test loader will
+        # re-import them from the build location. Required when 2to3 is used
+        # with namespace packages.
+        if not six.PY2 and getattr(self.distribution, 'use_2to3', False):
+            module = self.test_suite.split('.')[0]
+            if module in _namespace_packages:
+                del_modules = []
+                if module in sys.modules:
+                    del_modules.append(module)
+                module += '.'
+                for name in sys.modules:
+                    if name.startswith(module):
+                        del_modules.append(name)
+                list(map(sys.modules.__delitem__, del_modules))
+
+        test = unittest.main(
+            None, None, self._argv,
+            testLoader=self._resolve_as_ep(self.test_loader),
+            testRunner=self._resolve_as_ep(self.test_runner),
+            exit=False,
+        )
+        if not test.result.wasSuccessful():
+            msg = 'Test failed: %s' % test.result
+            self.announce(msg, log.ERROR)
+            raise DistutilsError(msg)
+
+    @property
+    def _argv(self):
+        return ['unittest'] + self.test_args
+
+    @staticmethod
+    def _resolve_as_ep(val):
+        """
+        Load the indicated attribute value, called, as a as if it were
+        specified as an entry point.
+        """
+        if val is None:
+            return
+        parsed = EntryPoint.parse("x=" + val)
+        return parsed.resolve()()
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/upload.py b/venv/lib/python3.9/site-packages/setuptools/command/upload.py
new file mode 100644
index 0000000..ec7f81e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/upload.py
@@ -0,0 +1,17 @@
+from distutils import log
+from distutils.command import upload as orig
+
+from setuptools.errors import RemovedCommandError
+
+
+class upload(orig.upload):
+    """Formerly used to upload packages to PyPI."""
+
+    def run(self):
+        msg = (
+            "The upload command has been removed, use twine to upload "
+            + "instead (https://pypi.org/p/twine)"
+        )
+
+        self.announce("ERROR: " + msg, log.ERROR)
+        raise RemovedCommandError(msg)
diff --git a/venv/lib/python3.9/site-packages/setuptools/command/upload_docs.py b/venv/lib/python3.9/site-packages/setuptools/command/upload_docs.py
new file mode 100644
index 0000000..130a0cb
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/command/upload_docs.py
@@ -0,0 +1,206 @@
+# -*- coding: utf-8 -*-
+"""upload_docs
+
+Implements a Distutils 'upload_docs' subcommand (upload documentation to
+PyPI's pythonhosted.org).
+"""
+
+from base64 import standard_b64encode
+from distutils import log
+from distutils.errors import DistutilsOptionError
+import os
+import socket
+import zipfile
+import tempfile
+import shutil
+import itertools
+import functools
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import http_client, urllib
+
+from pkg_resources import iter_entry_points
+from .upload import upload
+
+
+def _encode(s):
+    errors = 'strict' if six.PY2 else 'surrogateescape'
+    return s.encode('utf-8', errors)
+
+
+class upload_docs(upload):
+    # override the default repository as upload_docs isn't
+    # supported by Warehouse (and won't be).
+    DEFAULT_REPOSITORY = 'https://pypi.python.org/pypi/'
+
+    description = 'Upload documentation to PyPI'
+
+    user_options = [
+        ('repository=', 'r',
+         "url of repository [default: %s]" % upload.DEFAULT_REPOSITORY),
+        ('show-response', None,
+         'display full response text from server'),
+        ('upload-dir=', None, 'directory to upload'),
+    ]
+    boolean_options = upload.boolean_options
+
+    def has_sphinx(self):
+        if self.upload_dir is None:
+            for ep in iter_entry_points('distutils.commands', 'build_sphinx'):
+                return True
+
+    sub_commands = [('build_sphinx', has_sphinx)]
+
+    def initialize_options(self):
+        upload.initialize_options(self)
+        self.upload_dir = None
+        self.target_dir = None
+
+    def finalize_options(self):
+        upload.finalize_options(self)
+        if self.upload_dir is None:
+            if self.has_sphinx():
+                build_sphinx = self.get_finalized_command('build_sphinx')
+                self.target_dir = build_sphinx.builder_target_dir
+            else:
+                build = self.get_finalized_command('build')
+                self.target_dir = os.path.join(build.build_base, 'docs')
+        else:
+            self.ensure_dirname('upload_dir')
+            self.target_dir = self.upload_dir
+        if 'pypi.python.org' in self.repository:
+            log.warn("Upload_docs command is deprecated. Use RTD instead.")
+        self.announce('Using upload directory %s' % self.target_dir)
+
+    def create_zipfile(self, filename):
+        zip_file = zipfile.ZipFile(filename, "w")
+        try:
+            self.mkpath(self.target_dir)  # just in case
+            for root, dirs, files in os.walk(self.target_dir):
+                if root == self.target_dir and not files:
+                    tmpl = "no files found in upload directory '%s'"
+                    raise DistutilsOptionError(tmpl % self.target_dir)
+                for name in files:
+                    full = os.path.join(root, name)
+                    relative = root[len(self.target_dir):].lstrip(os.path.sep)
+                    dest = os.path.join(relative, name)
+                    zip_file.write(full, dest)
+        finally:
+            zip_file.close()
+
+    def run(self):
+        # Run sub commands
+        for cmd_name in self.get_sub_commands():
+            self.run_command(cmd_name)
+
+        tmp_dir = tempfile.mkdtemp()
+        name = self.distribution.metadata.get_name()
+        zip_file = os.path.join(tmp_dir, "%s.zip" % name)
+        try:
+            self.create_zipfile(zip_file)
+            self.upload_file(zip_file)
+        finally:
+            shutil.rmtree(tmp_dir)
+
+    @staticmethod
+    def _build_part(item, sep_boundary):
+        key, values = item
+        title = '\nContent-Disposition: form-data; name="%s"' % key
+        # handle multiple entries for the same name
+        if not isinstance(values, list):
+            values = [values]
+        for value in values:
+            if isinstance(value, tuple):
+                title += '; filename="%s"' % value[0]
+                value = value[1]
+            else:
+                value = _encode(value)
+            yield sep_boundary
+            yield _encode(title)
+            yield b"\n\n"
+            yield value
+            if value and value[-1:] == b'\r':
+                yield b'\n'  # write an extra newline (lurve Macs)
+
+    @classmethod
+    def _build_multipart(cls, data):
+        """
+        Build up the MIME payload for the POST data
+        """
+        boundary = b'--------------GHSKFJDLGDS7543FJKLFHRE75642756743254'
+        sep_boundary = b'\n--' + boundary
+        end_boundary = sep_boundary + b'--'
+        end_items = end_boundary, b"\n",
+        builder = functools.partial(
+            cls._build_part,
+            sep_boundary=sep_boundary,
+        )
+        part_groups = map(builder, data.items())
+        parts = itertools.chain.from_iterable(part_groups)
+        body_items = itertools.chain(parts, end_items)
+        content_type = 'multipart/form-data; boundary=%s' % boundary.decode('ascii')
+        return b''.join(body_items), content_type
+
+    def upload_file(self, filename):
+        with open(filename, 'rb') as f:
+            content = f.read()
+        meta = self.distribution.metadata
+        data = {
+            ':action': 'doc_upload',
+            'name': meta.get_name(),
+            'content': (os.path.basename(filename), content),
+        }
+        # set up the authentication
+        credentials = _encode(self.username + ':' + self.password)
+        credentials = standard_b64encode(credentials)
+        if not six.PY2:
+            credentials = credentials.decode('ascii')
+        auth = "Basic " + credentials
+
+        body, ct = self._build_multipart(data)
+
+        msg = "Submitting documentation to %s" % (self.repository)
+        self.announce(msg, log.INFO)
+
+        # build the Request
+        # We can't use urllib2 since we need to send the Basic
+        # auth right with the first request
+        schema, netloc, url, params, query, fragments = \
+            urllib.parse.urlparse(self.repository)
+        assert not params and not query and not fragments
+        if schema == 'http':
+            conn = http_client.HTTPConnection(netloc)
+        elif schema == 'https':
+            conn = http_client.HTTPSConnection(netloc)
+        else:
+            raise AssertionError("unsupported schema " + schema)
+
+        data = ''
+        try:
+            conn.connect()
+            conn.putrequest("POST", url)
+            content_type = ct
+            conn.putheader('Content-type', content_type)
+            conn.putheader('Content-length', str(len(body)))
+            conn.putheader('Authorization', auth)
+            conn.endheaders()
+            conn.send(body)
+        except socket.error as e:
+            self.announce(str(e), log.ERROR)
+            return
+
+        r = conn.getresponse()
+        if r.status == 200:
+            msg = 'Server response (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.INFO)
+        elif r.status == 301:
+            location = r.getheader('Location')
+            if location is None:
+                location = 'https://pythonhosted.org/%s/' % meta.get_name()
+            msg = 'Upload successful. Visit %s' % location
+            self.announce(msg, log.INFO)
+        else:
+            msg = 'Upload failed (%s): %s' % (r.status, r.reason)
+            self.announce(msg, log.ERROR)
+        if self.show_response:
+            print('-' * 75, r.read(), '-' * 75)
diff --git a/venv/lib/python3.9/site-packages/setuptools/config.py b/venv/lib/python3.9/site-packages/setuptools/config.py
new file mode 100644
index 0000000..9b9a0c4
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/config.py
@@ -0,0 +1,659 @@
+from __future__ import absolute_import, unicode_literals
+import io
+import os
+import sys
+
+import warnings
+import functools
+from collections import defaultdict
+from functools import partial
+from functools import wraps
+from importlib import import_module
+
+from distutils.errors import DistutilsOptionError, DistutilsFileError
+from setuptools.extern.packaging.version import LegacyVersion, parse
+from setuptools.extern.packaging.specifiers import SpecifierSet
+from setuptools.extern.six import string_types, PY3
+
+
+__metaclass__ = type
+
+
+def read_configuration(
+        filepath, find_others=False, ignore_option_errors=False):
+    """Read given configuration file and returns options from it as a dict.
+
+    :param str|unicode filepath: Path to configuration file
+        to get options from.
+
+    :param bool find_others: Whether to search for other configuration files
+        which could be on in various places.
+
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+
+    :rtype: dict
+    """
+    from setuptools.dist import Distribution, _Distribution
+
+    filepath = os.path.abspath(filepath)
+
+    if not os.path.isfile(filepath):
+        raise DistutilsFileError(
+            'Configuration file %s does not exist.' % filepath)
+
+    current_directory = os.getcwd()
+    os.chdir(os.path.dirname(filepath))
+
+    try:
+        dist = Distribution()
+
+        filenames = dist.find_config_files() if find_others else []
+        if filepath not in filenames:
+            filenames.append(filepath)
+
+        _Distribution.parse_config_files(dist, filenames=filenames)
+
+        handlers = parse_configuration(
+            dist, dist.command_options,
+            ignore_option_errors=ignore_option_errors)
+
+    finally:
+        os.chdir(current_directory)
+
+    return configuration_to_dict(handlers)
+
+
+def _get_option(target_obj, key):
+    """
+    Given a target object and option key, get that option from
+    the target object, either through a get_{key} method or
+    from an attribute directly.
+    """
+    getter_name = 'get_{key}'.format(**locals())
+    by_attribute = functools.partial(getattr, target_obj, key)
+    getter = getattr(target_obj, getter_name, by_attribute)
+    return getter()
+
+
+def configuration_to_dict(handlers):
+    """Returns configuration data gathered by given handlers as a dict.
+
+    :param list[ConfigHandler] handlers: Handlers list,
+        usually from parse_configuration()
+
+    :rtype: dict
+    """
+    config_dict = defaultdict(dict)
+
+    for handler in handlers:
+        for option in handler.set_options:
+            value = _get_option(handler.target_obj, option)
+            config_dict[handler.section_prefix][option] = value
+
+    return config_dict
+
+
+def parse_configuration(
+        distribution, command_options, ignore_option_errors=False):
+    """Performs additional parsing of configuration options
+    for a distribution.
+
+    Returns a list of used option handlers.
+
+    :param Distribution distribution:
+    :param dict command_options:
+    :param bool ignore_option_errors: Whether to silently ignore
+        options, values of which could not be resolved (e.g. due to exceptions
+        in directives such as file:, attr:, etc.).
+        If False exceptions are propagated as expected.
+    :rtype: list
+    """
+    options = ConfigOptionsHandler(
+        distribution, command_options, ignore_option_errors)
+    options.parse()
+
+    meta = ConfigMetadataHandler(
+        distribution.metadata, command_options, ignore_option_errors,
+        distribution.package_dir)
+    meta.parse()
+
+    return meta, options
+
+
+class ConfigHandler:
+    """Handles metadata supplied in configuration files."""
+
+    section_prefix = None
+    """Prefix for config sections handled by this handler.
+    Must be provided by class heirs.
+
+    """
+
+    aliases = {}
+    """Options aliases.
+    For compatibility with various packages. E.g.: d2to1 and pbr.
+    Note: `-` in keys is replaced with `_` by config parser.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False):
+        sections = {}
+
+        section_prefix = self.section_prefix
+        for section_name, section_options in options.items():
+            if not section_name.startswith(section_prefix):
+                continue
+
+            section_name = section_name.replace(section_prefix, '').strip('.')
+            sections[section_name] = section_options
+
+        self.ignore_option_errors = ignore_option_errors
+        self.target_obj = target_obj
+        self.sections = sections
+        self.set_options = []
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        raise NotImplementedError(
+            '%s must provide .parsers property' % self.__class__.__name__)
+
+    def __setitem__(self, option_name, value):
+        unknown = tuple()
+        target_obj = self.target_obj
+
+        # Translate alias into real name.
+        option_name = self.aliases.get(option_name, option_name)
+
+        current_value = getattr(target_obj, option_name, unknown)
+
+        if current_value is unknown:
+            raise KeyError(option_name)
+
+        if current_value:
+            # Already inhabited. Skipping.
+            return
+
+        skip_option = False
+        parser = self.parsers.get(option_name)
+        if parser:
+            try:
+                value = parser(value)
+
+            except Exception:
+                skip_option = True
+                if not self.ignore_option_errors:
+                    raise
+
+        if skip_option:
+            return
+
+        setter = getattr(target_obj, 'set_%s' % option_name, None)
+        if setter is None:
+            setattr(target_obj, option_name, value)
+        else:
+            setter(value)
+
+        self.set_options.append(option_name)
+
+    @classmethod
+    def _parse_list(cls, value, separator=','):
+        """Represents value as a list.
+
+        Value is split either by separator (defaults to comma) or by lines.
+
+        :param value:
+        :param separator: List items separator character.
+        :rtype: list
+        """
+        if isinstance(value, list):  # _get_parser_compound case
+            return value
+
+        if '\n' in value:
+            value = value.splitlines()
+        else:
+            value = value.split(separator)
+
+        return [chunk.strip() for chunk in value if chunk.strip()]
+
+    @classmethod
+    def _parse_dict(cls, value):
+        """Represents value as a dict.
+
+        :param value:
+        :rtype: dict
+        """
+        separator = '='
+        result = {}
+        for line in cls._parse_list(value):
+            key, sep, val = line.partition(separator)
+            if sep != separator:
+                raise DistutilsOptionError(
+                    'Unable to parse option value to dict: %s' % value)
+            result[key.strip()] = val.strip()
+
+        return result
+
+    @classmethod
+    def _parse_bool(cls, value):
+        """Represents value as boolean.
+
+        :param value:
+        :rtype: bool
+        """
+        value = value.lower()
+        return value in ('1', 'true', 'yes')
+
+    @classmethod
+    def _exclude_files_parser(cls, key):
+        """Returns a parser function to make sure field inputs
+        are not files.
+
+        Parses a value after getting the key so error messages are
+        more informative.
+
+        :param key:
+        :rtype: callable
+        """
+        def parser(value):
+            exclude_directive = 'file:'
+            if value.startswith(exclude_directive):
+                raise ValueError(
+                    'Only strings are accepted for the {0} field, '
+                    'files are not accepted'.format(key))
+            return value
+        return parser
+
+    @classmethod
+    def _parse_file(cls, value):
+        """Represents value as a string, allowing including text
+        from nearest files using `file:` directive.
+
+        Directive is sandboxed and won't reach anything outside
+        directory with setup.py.
+
+        Examples:
+            file: README.rst, CHANGELOG.md, src/file.txt
+
+        :param str value:
+        :rtype: str
+        """
+        include_directive = 'file:'
+
+        if not isinstance(value, string_types):
+            return value
+
+        if not value.startswith(include_directive):
+            return value
+
+        spec = value[len(include_directive):]
+        filepaths = (os.path.abspath(path.strip()) for path in spec.split(','))
+        return '\n'.join(
+            cls._read_file(path)
+            for path in filepaths
+            if (cls._assert_local(path) or True)
+            and os.path.isfile(path)
+        )
+
+    @staticmethod
+    def _assert_local(filepath):
+        if not filepath.startswith(os.getcwd()):
+            raise DistutilsOptionError(
+                '`file:` directive can not access %s' % filepath)
+
+    @staticmethod
+    def _read_file(filepath):
+        with io.open(filepath, encoding='utf-8') as f:
+            return f.read()
+
+    @classmethod
+    def _parse_attr(cls, value, package_dir=None):
+        """Represents value as a module attribute.
+
+        Examples:
+            attr: package.attr
+            attr: package.module.attr
+
+        :param str value:
+        :rtype: str
+        """
+        attr_directive = 'attr:'
+        if not value.startswith(attr_directive):
+            return value
+
+        attrs_path = value.replace(attr_directive, '').strip().split('.')
+        attr_name = attrs_path.pop()
+
+        module_name = '.'.join(attrs_path)
+        module_name = module_name or '__init__'
+
+        parent_path = os.getcwd()
+        if package_dir:
+            if attrs_path[0] in package_dir:
+                # A custom path was specified for the module we want to import
+                custom_path = package_dir[attrs_path[0]]
+                parts = custom_path.rsplit('/', 1)
+                if len(parts) > 1:
+                    parent_path = os.path.join(os.getcwd(), parts[0])
+                    module_name = parts[1]
+                else:
+                    module_name = custom_path
+            elif '' in package_dir:
+                # A custom parent directory was specified for all root modules
+                parent_path = os.path.join(os.getcwd(), package_dir[''])
+        sys.path.insert(0, parent_path)
+        try:
+            module = import_module(module_name)
+            value = getattr(module, attr_name)
+
+        finally:
+            sys.path = sys.path[1:]
+
+        return value
+
+    @classmethod
+    def _get_parser_compound(cls, *parse_methods):
+        """Returns parser function to represents value as a list.
+
+        Parses a value applying given methods one after another.
+
+        :param parse_methods:
+        :rtype: callable
+        """
+        def parse(value):
+            parsed = value
+
+            for method in parse_methods:
+                parsed = method(parsed)
+
+            return parsed
+
+        return parse
+
+    @classmethod
+    def _parse_section_to_dict(cls, section_options, values_parser=None):
+        """Parses section options into a dictionary.
+
+        Optionally applies a given parser to values.
+
+        :param dict section_options:
+        :param callable values_parser:
+        :rtype: dict
+        """
+        value = {}
+        values_parser = values_parser or (lambda val: val)
+        for key, (_, val) in section_options.items():
+            value[key] = values_parser(val)
+        return value
+
+    def parse_section(self, section_options):
+        """Parses configuration file section.
+
+        :param dict section_options:
+        """
+        for (name, (_, value)) in section_options.items():
+            try:
+                self[name] = value
+
+            except KeyError:
+                pass  # Keep silent for a new option may appear anytime.
+
+    def parse(self):
+        """Parses configuration file items from one
+        or more related sections.
+
+        """
+        for section_name, section_options in self.sections.items():
+
+            method_postfix = ''
+            if section_name:  # [section.option] variant
+                method_postfix = '_%s' % section_name
+
+            section_parser_method = getattr(
+                self,
+                # Dots in section names are translated into dunderscores.
+                ('parse_section%s' % method_postfix).replace('.', '__'),
+                None)
+
+            if section_parser_method is None:
+                raise DistutilsOptionError(
+                    'Unsupported distribution option section: [%s.%s]' % (
+                        self.section_prefix, section_name))
+
+            section_parser_method(section_options)
+
+    def _deprecated_config_handler(self, func, msg, warning_class):
+        """ this function will wrap around parameters that are deprecated
+
+        :param msg: deprecation message
+        :param warning_class: class of warning exception to be raised
+        :param func: function to be wrapped around
+        """
+        @wraps(func)
+        def config_handler(*args, **kwargs):
+            warnings.warn(msg, warning_class)
+            return func(*args, **kwargs)
+
+        return config_handler
+
+
+class ConfigMetadataHandler(ConfigHandler):
+
+    section_prefix = 'metadata'
+
+    aliases = {
+        'home_page': 'url',
+        'summary': 'description',
+        'classifier': 'classifiers',
+        'platform': 'platforms',
+    }
+
+    strict_mode = False
+    """We need to keep it loose, to be partially compatible with
+    `pbr` and `d2to1` packages which also uses `metadata` section.
+
+    """
+
+    def __init__(self, target_obj, options, ignore_option_errors=False,
+                 package_dir=None):
+        super(ConfigMetadataHandler, self).__init__(target_obj, options,
+                                                    ignore_option_errors)
+        self.package_dir = package_dir
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_file = self._parse_file
+        parse_dict = self._parse_dict
+        exclude_files_parser = self._exclude_files_parser
+
+        return {
+            'platforms': parse_list,
+            'keywords': parse_list,
+            'provides': parse_list,
+            'requires': self._deprecated_config_handler(
+                parse_list,
+                "The requires parameter is deprecated, please use "
+                "install_requires for runtime dependencies.",
+                DeprecationWarning),
+            'obsoletes': parse_list,
+            'classifiers': self._get_parser_compound(parse_file, parse_list),
+            'license': exclude_files_parser('license'),
+            'license_files': parse_list,
+            'description': parse_file,
+            'long_description': parse_file,
+            'version': self._parse_version,
+            'project_urls': parse_dict,
+        }
+
+    def _parse_version(self, value):
+        """Parses `version` option value.
+
+        :param value:
+        :rtype: str
+
+        """
+        version = self._parse_file(value)
+
+        if version != value:
+            version = version.strip()
+            # Be strict about versions loaded from file because it's easy to
+            # accidentally include newlines and other unintended content
+            if isinstance(parse(version), LegacyVersion):
+                tmpl = (
+                    'Version loaded from {value} does not '
+                    'comply with PEP 440: {version}'
+                )
+                raise DistutilsOptionError(tmpl.format(**locals()))
+
+            return version
+
+        version = self._parse_attr(value, self.package_dir)
+
+        if callable(version):
+            version = version()
+
+        if not isinstance(version, string_types):
+            if hasattr(version, '__iter__'):
+                version = '.'.join(map(str, version))
+            else:
+                version = '%s' % version
+
+        return version
+
+
+class ConfigOptionsHandler(ConfigHandler):
+
+    section_prefix = 'options'
+
+    @property
+    def parsers(self):
+        """Metadata item name to parser function mapping."""
+        parse_list = self._parse_list
+        parse_list_semicolon = partial(self._parse_list, separator=';')
+        parse_bool = self._parse_bool
+        parse_dict = self._parse_dict
+
+        return {
+            'zip_safe': parse_bool,
+            'use_2to3': parse_bool,
+            'include_package_data': parse_bool,
+            'package_dir': parse_dict,
+            'use_2to3_fixers': parse_list,
+            'use_2to3_exclude_fixers': parse_list,
+            'convert_2to3_doctests': parse_list,
+            'scripts': parse_list,
+            'eager_resources': parse_list,
+            'dependency_links': parse_list,
+            'namespace_packages': parse_list,
+            'install_requires': parse_list_semicolon,
+            'setup_requires': parse_list_semicolon,
+            'tests_require': parse_list_semicolon,
+            'packages': self._parse_packages,
+            'entry_points': self._parse_file,
+            'py_modules': parse_list,
+            'python_requires': SpecifierSet,
+        }
+
+    def _parse_packages(self, value):
+        """Parses `packages` option value.
+
+        :param value:
+        :rtype: list
+        """
+        find_directives = ['find:', 'find_namespace:']
+        trimmed_value = value.strip()
+
+        if trimmed_value not in find_directives:
+            return self._parse_list(value)
+
+        findns = trimmed_value == find_directives[1]
+        if findns and not PY3:
+            raise DistutilsOptionError(
+                'find_namespace: directive is unsupported on Python < 3.3')
+
+        # Read function arguments from a dedicated section.
+        find_kwargs = self.parse_section_packages__find(
+            self.sections.get('packages.find', {}))
+
+        if findns:
+            from setuptools import find_namespace_packages as find_packages
+        else:
+            from setuptools import find_packages
+
+        return find_packages(**find_kwargs)
+
+    def parse_section_packages__find(self, section_options):
+        """Parses `packages.find` configuration file section.
+
+        To be used in conjunction with _parse_packages().
+
+        :param dict section_options:
+        """
+        section_data = self._parse_section_to_dict(
+            section_options, self._parse_list)
+
+        valid_keys = ['where', 'include', 'exclude']
+
+        find_kwargs = dict(
+            [(k, v) for k, v in section_data.items() if k in valid_keys and v])
+
+        where = find_kwargs.get('where')
+        if where is not None:
+            find_kwargs['where'] = where[0]  # cast list to single val
+
+        return find_kwargs
+
+    def parse_section_entry_points(self, section_options):
+        """Parses `entry_points` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['entry_points'] = parsed
+
+    def _parse_package_data(self, section_options):
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+
+        root = parsed.get('*')
+        if root:
+            parsed[''] = root
+            del parsed['*']
+
+        return parsed
+
+    def parse_section_package_data(self, section_options):
+        """Parses `package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['package_data'] = self._parse_package_data(section_options)
+
+    def parse_section_exclude_package_data(self, section_options):
+        """Parses `exclude_package_data` configuration file section.
+
+        :param dict section_options:
+        """
+        self['exclude_package_data'] = self._parse_package_data(
+            section_options)
+
+    def parse_section_extras_require(self, section_options):
+        """Parses `extras_require` configuration file section.
+
+        :param dict section_options:
+        """
+        parse_list = partial(self._parse_list, separator=';')
+        self['extras_require'] = self._parse_section_to_dict(
+            section_options, parse_list)
+
+    def parse_section_data_files(self, section_options):
+        """Parses `data_files` configuration file section.
+
+        :param dict section_options:
+        """
+        parsed = self._parse_section_to_dict(section_options, self._parse_list)
+        self['data_files'] = [(k, v) for k, v in parsed.items()]
diff --git a/venv/lib/python3.9/site-packages/setuptools/dep_util.py b/venv/lib/python3.9/site-packages/setuptools/dep_util.py
new file mode 100644
index 0000000..2931c13
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/dep_util.py
@@ -0,0 +1,23 @@
+from distutils.dep_util import newer_group
+
+# yes, this is was almost entirely copy-pasted from
+# 'newer_pairwise()', this is just another convenience
+# function.
+def newer_pairwise_group(sources_groups, targets):
+    """Walk both arguments in parallel, testing if each source group is newer
+    than its corresponding target. Returns a pair of lists (sources_groups,
+    targets) where sources is newer than target, according to the semantics
+    of 'newer_group()'.
+    """
+    if len(sources_groups) != len(targets):
+        raise ValueError("'sources_group' and 'targets' must be the same length")
+
+    # build a pair of lists (sources_groups, targets) where source is newer
+    n_sources = []
+    n_targets = []
+    for i in range(len(sources_groups)):
+        if newer_group(sources_groups[i], targets[i]):
+            n_sources.append(sources_groups[i])
+            n_targets.append(targets[i])
+
+    return n_sources, n_targets
diff --git a/venv/lib/python3.9/site-packages/setuptools/depends.py b/venv/lib/python3.9/site-packages/setuptools/depends.py
new file mode 100644
index 0000000..a37675c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/depends.py
@@ -0,0 +1,176 @@
+import sys
+import marshal
+import contextlib
+from distutils.version import StrictVersion
+
+from .py33compat import Bytecode
+
+from .py27compat import find_module, PY_COMPILED, PY_FROZEN, PY_SOURCE
+from . import py27compat
+
+
+__all__ = [
+    'Require', 'find_module', 'get_module_constant', 'extract_constant'
+]
+
+
+class Require:
+    """A prerequisite to building or installing a distribution"""
+
+    def __init__(
+            self, name, requested_version, module, homepage='',
+            attribute=None, format=None):
+
+        if format is None and requested_version is not None:
+            format = StrictVersion
+
+        if format is not None:
+            requested_version = format(requested_version)
+            if attribute is None:
+                attribute = '__version__'
+
+        self.__dict__.update(locals())
+        del self.self
+
+    def full_name(self):
+        """Return full package/distribution name, w/version"""
+        if self.requested_version is not None:
+            return '%s-%s' % (self.name, self.requested_version)
+        return self.name
+
+    def version_ok(self, version):
+        """Is 'version' sufficiently up-to-date?"""
+        return self.attribute is None or self.format is None or \
+            str(version) != "unknown" and version >= self.requested_version
+
+    def get_version(self, paths=None, default="unknown"):
+        """Get version number of installed module, 'None', or 'default'
+
+        Search 'paths' for module.  If not found, return 'None'.  If found,
+        return the extracted version attribute, or 'default' if no version
+        attribute was specified, or the value cannot be determined without
+        importing the module.  The version is formatted according to the
+        requirement's version format (if any), unless it is 'None' or the
+        supplied 'default'.
+        """
+
+        if self.attribute is None:
+            try:
+                f, p, i = find_module(self.module, paths)
+                if f:
+                    f.close()
+                return default
+            except ImportError:
+                return None
+
+        v = get_module_constant(self.module, self.attribute, default, paths)
+
+        if v is not None and v is not default and self.format is not None:
+            return self.format(v)
+
+        return v
+
+    def is_present(self, paths=None):
+        """Return true if dependency is present on 'paths'"""
+        return self.get_version(paths) is not None
+
+    def is_current(self, paths=None):
+        """Return true if dependency is present and up-to-date on 'paths'"""
+        version = self.get_version(paths)
+        if version is None:
+            return False
+        return self.version_ok(version)
+
+
+def maybe_close(f):
+    @contextlib.contextmanager
+    def empty():
+        yield
+        return
+    if not f:
+        return empty()
+
+    return contextlib.closing(f)
+
+
+def get_module_constant(module, symbol, default=-1, paths=None):
+    """Find 'module' by searching 'paths', and extract 'symbol'
+
+    Return 'None' if 'module' does not exist on 'paths', or it does not define
+    'symbol'.  If the module defines 'symbol' as a constant, return the
+    constant.  Otherwise, return 'default'."""
+
+    try:
+        f, path, (suffix, mode, kind) = info = find_module(module, paths)
+    except ImportError:
+        # Module doesn't exist
+        return None
+
+    with maybe_close(f):
+        if kind == PY_COMPILED:
+            f.read(8)  # skip magic & date
+            code = marshal.load(f)
+        elif kind == PY_FROZEN:
+            code = py27compat.get_frozen_object(module, paths)
+        elif kind == PY_SOURCE:
+            code = compile(f.read(), path, 'exec')
+        else:
+            # Not something we can parse; we'll have to import it.  :(
+            imported = py27compat.get_module(module, paths, info)
+            return getattr(imported, symbol, None)
+
+    return extract_constant(code, symbol, default)
+
+
+def extract_constant(code, symbol, default=-1):
+    """Extract the constant value of 'symbol' from 'code'
+
+    If the name 'symbol' is bound to a constant value by the Python code
+    object 'code', return that value.  If 'symbol' is bound to an expression,
+    return 'default'.  Otherwise, return 'None'.
+
+    Return value is based on the first assignment to 'symbol'.  'symbol' must
+    be a global, or at least a non-"fast" local in the code block.  That is,
+    only 'STORE_NAME' and 'STORE_GLOBAL' opcodes are checked, and 'symbol'
+    must be present in 'code.co_names'.
+    """
+    if symbol not in code.co_names:
+        # name's not there, can't possibly be an assignment
+        return None
+
+    name_idx = list(code.co_names).index(symbol)
+
+    STORE_NAME = 90
+    STORE_GLOBAL = 97
+    LOAD_CONST = 100
+
+    const = default
+
+    for byte_code in Bytecode(code):
+        op = byte_code.opcode
+        arg = byte_code.arg
+
+        if op == LOAD_CONST:
+            const = code.co_consts[arg]
+        elif arg == name_idx and (op == STORE_NAME or op == STORE_GLOBAL):
+            return const
+        else:
+            const = default
+
+
+def _update_globals():
+    """
+    Patch the globals to remove the objects not available on some platforms.
+
+    XXX it'd be better to test assertions about bytecode instead.
+    """
+
+    if not sys.platform.startswith('java') and sys.platform != 'cli':
+        return
+    incompatible = 'extract_constant', 'get_module_constant'
+    for name in incompatible:
+        del globals()[name]
+        __all__.remove(name)
+
+
+_update_globals()
diff --git a/venv/lib/python3.9/site-packages/setuptools/dist.py b/venv/lib/python3.9/site-packages/setuptools/dist.py
new file mode 100644
index 0000000..0480aaa
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/dist.py
@@ -0,0 +1,1274 @@
+# -*- coding: utf-8 -*-
+__all__ = ['Distribution']
+
+import io
+import sys
+import re
+import os
+import warnings
+import numbers
+import distutils.log
+import distutils.core
+import distutils.cmd
+import distutils.dist
+from distutils.util import strtobool
+from distutils.debug import DEBUG
+from distutils.fancy_getopt import translate_longopt
+import itertools
+
+from collections import defaultdict
+from email import message_from_file
+
+from distutils.errors import (
+    DistutilsOptionError, DistutilsPlatformError, DistutilsSetupError,
+)
+from distutils.util import rfc822_escape
+from distutils.version import StrictVersion
+
+from setuptools.extern import six
+from setuptools.extern import packaging
+from setuptools.extern import ordered_set
+from setuptools.extern.six.moves import map, filter, filterfalse
+
+from . import SetuptoolsDeprecationWarning
+
+from setuptools.depends import Require
+from setuptools import windows_support
+from setuptools.monkey import get_unpatched
+from setuptools.config import parse_configuration
+import pkg_resources
+
+__import__('setuptools.extern.packaging.specifiers')
+__import__('setuptools.extern.packaging.version')
+
+
+def _get_unpatched(cls):
+    warnings.warn("Do not call this function", DistDeprecationWarning)
+    return get_unpatched(cls)
+
+
+def get_metadata_version(self):
+    mv = getattr(self, 'metadata_version', None)
+
+    if mv is None:
+        if self.long_description_content_type or self.provides_extras:
+            mv = StrictVersion('2.1')
+        elif (self.maintainer is not None or
+              self.maintainer_email is not None or
+              getattr(self, 'python_requires', None) is not None or
+              self.project_urls):
+            mv = StrictVersion('1.2')
+        elif (self.provides or self.requires or self.obsoletes or
+                self.classifiers or self.download_url):
+            mv = StrictVersion('1.1')
+        else:
+            mv = StrictVersion('1.0')
+
+        self.metadata_version = mv
+
+    return mv
+
+
+def read_pkg_file(self, file):
+    """Reads the metadata values from a file object."""
+    msg = message_from_file(file)
+
+    def _read_field(name):
+        value = msg[name]
+        if value == 'UNKNOWN':
+            return None
+        return value
+
+    def _read_list(name):
+        values = msg.get_all(name, None)
+        if values == []:
+            return None
+        return values
+
+    self.metadata_version = StrictVersion(msg['metadata-version'])
+    self.name = _read_field('name')
+    self.version = _read_field('version')
+    self.description = _read_field('summary')
+    # we are filling author only.
+    self.author = _read_field('author')
+    self.maintainer = None
+    self.author_email = _read_field('author-email')
+    self.maintainer_email = None
+    self.url = _read_field('home-page')
+    self.license = _read_field('license')
+
+    if 'download-url' in msg:
+        self.download_url = _read_field('download-url')
+    else:
+        self.download_url = None
+
+    self.long_description = _read_field('description')
+    self.description = _read_field('summary')
+
+    if 'keywords' in msg:
+        self.keywords = _read_field('keywords').split(',')
+
+    self.platforms = _read_list('platform')
+    self.classifiers = _read_list('classifier')
+
+    # PEP 314 - these fields only exist in 1.1
+    if self.metadata_version == StrictVersion('1.1'):
+        self.requires = _read_list('requires')
+        self.provides = _read_list('provides')
+        self.obsoletes = _read_list('obsoletes')
+    else:
+        self.requires = None
+        self.provides = None
+        self.obsoletes = None
+
+
+# Based on Python 3.5 version
+def write_pkg_file(self, file):
+    """Write the PKG-INFO format data to a file object.
+    """
+    version = self.get_metadata_version()
+
+    if six.PY2:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, self._encode_field(value)))
+    else:
+        def write_field(key, value):
+            file.write("%s: %s\n" % (key, value))
+
+    write_field('Metadata-Version', str(version))
+    write_field('Name', self.get_name())
+    write_field('Version', self.get_version())
+    write_field('Summary', self.get_description())
+    write_field('Home-page', self.get_url())
+
+    if version < StrictVersion('1.2'):
+        write_field('Author', self.get_contact())
+        write_field('Author-email', self.get_contact_email())
+    else:
+        optional_fields = (
+            ('Author', 'author'),
+            ('Author-email', 'author_email'),
+            ('Maintainer', 'maintainer'),
+            ('Maintainer-email', 'maintainer_email'),
+        )
+
+        for field, attr in optional_fields:
+            attr_val = getattr(self, attr)
+
+            if attr_val is not None:
+                write_field(field, attr_val)
+
+    write_field('License', self.get_license())
+    if self.download_url:
+        write_field('Download-URL', self.download_url)
+    for project_url in self.project_urls.items():
+        write_field('Project-URL',  '%s, %s' % project_url)
+
+    long_desc = rfc822_escape(self.get_long_description())
+    write_field('Description', long_desc)
+
+    keywords = ','.join(self.get_keywords())
+    if keywords:
+        write_field('Keywords', keywords)
+
+    if version >= StrictVersion('1.2'):
+        for platform in self.get_platforms():
+            write_field('Platform', platform)
+    else:
+        self._write_list(file, 'Platform', self.get_platforms())
+
+    self._write_list(file, 'Classifier', self.get_classifiers())
+
+    # PEP 314
+    self._write_list(file, 'Requires', self.get_requires())
+    self._write_list(file, 'Provides', self.get_provides())
+    self._write_list(file, 'Obsoletes', self.get_obsoletes())
+
+    # Setuptools specific for PEP 345
+    if hasattr(self, 'python_requires'):
+        write_field('Requires-Python', self.python_requires)
+
+    # PEP 566
+    if self.long_description_content_type:
+        write_field(
+            'Description-Content-Type',
+            self.long_description_content_type
+        )
+    if self.provides_extras:
+        for extra in sorted(self.provides_extras):
+            write_field('Provides-Extra', extra)
+
+
+sequence = tuple, list
+
+
+def check_importable(dist, attr, value):
+    try:
+        ep = pkg_resources.EntryPoint.parse('x=' + value)
+        assert not ep.extras
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be importable 'module:attrs' string (got %r)"
+            % (attr, value)
+        )
+
+
+def assert_string_list(dist, attr, value):
+    """Verify that value is a string list"""
+    try:
+        # verify that value is a list or tuple to exclude unordered
+        # or single-use iterables
+        assert isinstance(value, (list, tuple))
+        # verify that elements of value are strings
+        assert ''.join(value) != value
+    except (TypeError, ValueError, AttributeError, AssertionError):
+        raise DistutilsSetupError(
+            "%r must be a list of strings (got %r)" % (attr, value)
+        )
+
+
+def check_nsp(dist, attr, value):
+    """Verify that namespace packages are valid"""
+    ns_packages = value
+    assert_string_list(dist, attr, ns_packages)
+    for nsp in ns_packages:
+        if not dist.has_contents_for(nsp):
+            raise DistutilsSetupError(
+                "Distribution contains no modules or packages for " +
+                "namespace package %r" % nsp
+            )
+        parent, sep, child = nsp.rpartition('.')
+        if parent and parent not in ns_packages:
+            distutils.log.warn(
+                "WARNING: %r is declared as a package namespace, but %r"
+                " is not: please correct this in setup.py", nsp, parent
+            )
+
+
+def check_extras(dist, attr, value):
+    """Verify that extras_require mapping is valid"""
+    try:
+        list(itertools.starmap(_check_extra, value.items()))
+    except (TypeError, ValueError, AttributeError):
+        raise DistutilsSetupError(
+            "'extras_require' must be a dictionary whose values are "
+            "strings or lists of strings containing valid project/version "
+            "requirement specifiers."
+        )
+
+
+def _check_extra(extra, reqs):
+    name, sep, marker = extra.partition(':')
+    if marker and pkg_resources.invalid_marker(marker):
+        raise DistutilsSetupError("Invalid environment marker: " + marker)
+    list(pkg_resources.parse_requirements(reqs))
+
+
+def assert_bool(dist, attr, value):
+    """Verify that value is True, False, 0, or 1"""
+    if bool(value) != value:
+        tmpl = "{attr!r} must be a boolean value (got {value!r})"
+        raise DistutilsSetupError(tmpl.format(attr=attr, value=value))
+
+
+def check_requirements(dist, attr, value):
+    """Verify that install_requires is a valid requirements list"""
+    try:
+        list(pkg_resources.parse_requirements(value))
+        if isinstance(value, (dict, set)):
+            raise TypeError("Unordered types are not allowed")
+    except (TypeError, ValueError) as error:
+        tmpl = (
+            "{attr!r} must be a string or list of strings "
+            "containing valid project/version requirement specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_specifier(dist, attr, value):
+    """Verify that value is a valid version specifier"""
+    try:
+        packaging.specifiers.SpecifierSet(value)
+    except packaging.specifiers.InvalidSpecifier as error:
+        tmpl = (
+            "{attr!r} must be a string "
+            "containing valid version specifiers; {error}"
+        )
+        raise DistutilsSetupError(tmpl.format(attr=attr, error=error))
+
+
+def check_entry_points(dist, attr, value):
+    """Verify that entry_points map is parseable"""
+    try:
+        pkg_resources.EntryPoint.parse_map(value)
+    except ValueError as e:
+        raise DistutilsSetupError(e)
+
+
+def check_test_suite(dist, attr, value):
+    if not isinstance(value, six.string_types):
+        raise DistutilsSetupError("test_suite must be a string")
+
+
+def check_package_data(dist, attr, value):
+    """Verify that value is a dictionary of package names to glob lists"""
+    if not isinstance(value, dict):
+        raise DistutilsSetupError(
+            "{!r} must be a dictionary mapping package names to lists of "
+            "string wildcard patterns".format(attr))
+    for k, v in value.items():
+        if not isinstance(k, six.string_types):
+            raise DistutilsSetupError(
+                "keys of {!r} dict must be strings (got {!r})"
+                .format(attr, k)
+            )
+        assert_string_list(dist, 'values of {!r} dict'.format(attr), v)
+
+
+def check_packages(dist, attr, value):
+    for pkgname in value:
+        if not re.match(r'\w+(\.\w+)*', pkgname):
+            distutils.log.warn(
+                "WARNING: %r not a valid package name; please use only "
+                ".-separated package names in setup.py", pkgname
+            )
+
+
+_Distribution = get_unpatched(distutils.core.Distribution)
+
+
+class Distribution(_Distribution):
+    """Distribution with support for features, tests, and package data
+
+    This is an enhanced version of 'distutils.dist.Distribution' that
+    effectively adds the following new optional keyword arguments to 'setup()':
+
+     'install_requires' -- a string or sequence of strings specifying project
+        versions that the distribution requires when installed, in the format
+        used by 'pkg_resources.require()'.  They will be installed
+        automatically when the package is installed.  If you wish to use
+        packages that are not available in PyPI, or want to give your users an
+        alternate download location, you can add a 'find_links' option to the
+        '[easy_install]' section of your project's 'setup.cfg' file, and then
+        setuptools will scan the listed web pages for links that satisfy the
+        requirements.
+
+     'extras_require' -- a dictionary mapping names of optional "extras" to the
+        additional requirement(s) that using those extras incurs. For example,
+        this::
+
+            extras_require = dict(reST = ["docutils>=0.3", "reSTedit"])
+
+        indicates that the distribution can optionally provide an extra
+        capability called "reST", but it can only be used if docutils and
+        reSTedit are installed.  If the user installs your package using
+        EasyInstall and requests one of your extras, the corresponding
+        additional requirements will be installed if needed.
+
+     'features' **deprecated** -- a dictionary mapping option names to
+        'setuptools.Feature'
+        objects.  Features are a portion of the distribution that can be
+        included or excluded based on user options, inter-feature dependencies,
+        and availability on the current system.  Excluded features are omitted
+        from all setup commands, including source and binary distributions, so
+        you can create multiple distributions from the same source tree.
+        Feature names should be valid Python identifiers, except that they may
+        contain the '-' (minus) sign.  Features can be included or excluded
+        via the command line options '--with-X' and '--without-X', where 'X' is
+        the name of the feature.  Whether a feature is included by default, and
+        whether you are allowed to control this from the command line, is
+        determined by the Feature object.  See the 'Feature' class for more
+        information.
+
+     'test_suite' -- the name of a test suite to run for the 'test' command.
+        If the user runs 'python setup.py test', the package will be installed,
+        and the named test suite will be run.  The format is the same as
+        would be used on a 'unittest.py' command line.  That is, it is the
+        dotted name of an object to import and call to generate a test suite.
+
+     'package_data' -- a dictionary mapping package names to lists of filenames
+        or globs to use to find data files contained in the named packages.
+        If the dictionary has filenames or globs listed under '""' (the empty
+        string), those names will be searched for in every package, in addition
+        to any names for the specific package.  Data files found using these
+        names/globs will be installed along with the package, in the same
+        location as the package.  Note that globs are allowed to reference
+        the contents of non-package subdirectories, as long as you use '/' as
+        a path separator.  (Globs are automatically converted to
+        platform-specific paths at runtime.)
+
+    In addition to these new keywords, this class also has several new methods
+    for manipulating the distribution's contents.  For example, the 'include()'
+    and 'exclude()' methods can be thought of as in-place add and subtract
+    commands that add or remove packages, modules, extensions, and so on from
+    the distribution.  They are used by the feature subsystem to configure the
+    distribution for the included and excluded features.
+    """
+
+    _DISTUTILS_UNSUPPORTED_METADATA = {
+        'long_description_content_type': None,
+        'project_urls': dict,
+        'provides_extras': ordered_set.OrderedSet,
+        'license_files': ordered_set.OrderedSet,
+    }
+
+    _patched_dist = None
+
+    def patch_missing_pkg_info(self, attrs):
+        # Fake up a replacement for the data that would normally come from
+        # PKG-INFO, but which might not yet be built if this is a fresh
+        # checkout.
+        #
+        if not attrs or 'name' not in attrs or 'version' not in attrs:
+            return
+        key = pkg_resources.safe_name(str(attrs['name'])).lower()
+        dist = pkg_resources.working_set.by_key.get(key)
+        if dist is not None and not dist.has_metadata('PKG-INFO'):
+            dist._version = pkg_resources.safe_version(str(attrs['version']))
+            self._patched_dist = dist
+
+    def __init__(self, attrs=None):
+        have_package_data = hasattr(self, "package_data")
+        if not have_package_data:
+            self.package_data = {}
+        attrs = attrs or {}
+        if 'features' in attrs or 'require_features' in attrs:
+            Feature.warn_deprecated()
+        self.require_features = []
+        self.features = {}
+        self.dist_files = []
+        # Filter-out setuptools' specific options.
+        self.src_root = attrs.pop("src_root", None)
+        self.patch_missing_pkg_info(attrs)
+        self.dependency_links = attrs.pop('dependency_links', [])
+        self.setup_requires = attrs.pop('setup_requires', [])
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            vars(self).setdefault(ep.name, None)
+        _Distribution.__init__(self, {
+            k: v for k, v in attrs.items()
+            if k not in self._DISTUTILS_UNSUPPORTED_METADATA
+        })
+
+        # Fill-in missing metadata fields not supported by distutils.
+        # Note some fields may have been set by other tools (e.g. pbr)
+        # above; they are taken preferrentially to setup() arguments
+        for option, default in self._DISTUTILS_UNSUPPORTED_METADATA.items():
+            for source in self.metadata.__dict__, attrs:
+                if option in source:
+                    value = source[option]
+                    break
+            else:
+                value = default() if default else None
+            setattr(self.metadata, option, value)
+
+        if isinstance(self.metadata.version, numbers.Number):
+            # Some people apparently take "version number" too literally :)
+            self.metadata.version = str(self.metadata.version)
+
+        if self.metadata.version is not None:
+            try:
+                ver = packaging.version.Version(self.metadata.version)
+                normalized_version = str(ver)
+                if self.metadata.version != normalized_version:
+                    warnings.warn(
+                        "Normalizing '%s' to '%s'" % (
+                            self.metadata.version,
+                            normalized_version,
+                        )
+                    )
+                    self.metadata.version = normalized_version
+            except (packaging.version.InvalidVersion, TypeError):
+                warnings.warn(
+                    "The version specified (%r) is an invalid version, this "
+                    "may not work as expected with newer versions of "
+                    "setuptools, pip, and PyPI. Please see PEP 440 for more "
+                    "details." % self.metadata.version
+                )
+        self._finalize_requires()
+
+    def _finalize_requires(self):
+        """
+        Set `metadata.python_requires` and fix environment markers
+        in `install_requires` and `extras_require`.
+        """
+        if getattr(self, 'python_requires', None):
+            self.metadata.python_requires = self.python_requires
+
+        if getattr(self, 'extras_require', None):
+            for extra in self.extras_require.keys():
+                # Since this gets called multiple times at points where the
+                # keys have become 'converted' extras, ensure that we are only
+                # truly adding extras we haven't seen before here.
+                extra = extra.split(':')[0]
+                if extra:
+                    self.metadata.provides_extras.add(extra)
+
+        self._convert_extras_requirements()
+        self._move_install_requirements_markers()
+
+    def _convert_extras_requirements(self):
+        """
+        Convert requirements in `extras_require` of the form
+        `"extra": ["barbazquux; {marker}"]` to
+        `"extra:{marker}": ["barbazquux"]`.
+        """
+        spec_ext_reqs = getattr(self, 'extras_require', None) or {}
+        self._tmp_extras_require = defaultdict(list)
+        for section, v in spec_ext_reqs.items():
+            # Do not strip empty sections.
+            self._tmp_extras_require[section]
+            for r in pkg_resources.parse_requirements(v):
+                suffix = self._suffix_for(r)
+                self._tmp_extras_require[section + suffix].append(r)
+
+    @staticmethod
+    def _suffix_for(req):
+        """
+        For a requirement, return the 'extras_require' suffix for
+        that requirement.
+        """
+        return ':' + str(req.marker) if req.marker else ''
+
+    def _move_install_requirements_markers(self):
+        """
+        Move requirements in `install_requires` that are using environment
+        markers `extras_require`.
+        """
+
+        # divide the install_requires into two sets, simple ones still
+        # handled by install_requires and more complex ones handled
+        # by extras_require.
+
+        def is_simple_req(req):
+            return not req.marker
+
+        spec_inst_reqs = getattr(self, 'install_requires', None) or ()
+        inst_reqs = list(pkg_resources.parse_requirements(spec_inst_reqs))
+        simple_reqs = filter(is_simple_req, inst_reqs)
+        complex_reqs = filterfalse(is_simple_req, inst_reqs)
+        self.install_requires = list(map(str, simple_reqs))
+
+        for r in complex_reqs:
+            self._tmp_extras_require[':' + str(r.marker)].append(r)
+        self.extras_require = dict(
+            (k, [str(r) for r in map(self._clean_req, v)])
+            for k, v in self._tmp_extras_require.items()
+        )
+
+    def _clean_req(self, req):
+        """
+        Given a Requirement, remove environment markers and return it.
+        """
+        req.marker = None
+        return req
+
+    def _parse_config_files(self, filenames=None):
+        """
+        Adapted from distutils.dist.Distribution.parse_config_files,
+        this method provides the same functionality in subtly-improved
+        ways.
+        """
+        from setuptools.extern.six.moves.configparser import ConfigParser
+
+        # Ignore install directory options if we have a venv
+        if not six.PY2 and sys.prefix != sys.base_prefix:
+            ignore_options = [
+                'install-base', 'install-platbase', 'install-lib',
+                'install-platlib', 'install-purelib', 'install-headers',
+                'install-scripts', 'install-data', 'prefix', 'exec-prefix',
+                'home', 'user', 'root']
+        else:
+            ignore_options = []
+
+        ignore_options = frozenset(ignore_options)
+
+        if filenames is None:
+            filenames = self.find_config_files()
+
+        if DEBUG:
+            self.announce("Distribution.parse_config_files():")
+
+        parser = ConfigParser()
+        for filename in filenames:
+            with io.open(filename, encoding='utf-8') as reader:
+                if DEBUG:
+                    self.announce("  reading {filename}".format(**locals()))
+                (parser.readfp if six.PY2 else parser.read_file)(reader)
+            for section in parser.sections():
+                options = parser.options(section)
+                opt_dict = self.get_option_dict(section)
+
+                for opt in options:
+                    if opt != '__name__' and opt not in ignore_options:
+                        val = self._try_str(parser.get(section, opt))
+                        opt = opt.replace('-', '_')
+                        opt_dict[opt] = (filename, val)
+
+            # Make the ConfigParser forget everything (so we retain
+            # the original filenames that options come from)
+            parser.__init__()
+
+        # If there was a "global" section in the config file, use it
+        # to set Distribution options.
+
+        if 'global' in self.command_options:
+            for (opt, (src, val)) in self.command_options['global'].items():
+                alias = self.negative_opt.get(opt)
+                try:
+                    if alias:
+                        setattr(self, alias, not strtobool(val))
+                    elif opt in ('verbose', 'dry_run'):  # ugh!
+                        setattr(self, opt, strtobool(val))
+                    else:
+                        setattr(self, opt, val)
+                except ValueError as msg:
+                    raise DistutilsOptionError(msg)
+
+    @staticmethod
+    def _try_str(val):
+        """
+        On Python 2, much of distutils relies on string values being of
+        type 'str' (bytes) and not unicode text. If the value can be safely
+        encoded to bytes using the default encoding, prefer that.
+
+        Why the default encoding? Because that value can be implicitly
+        decoded back to text if needed.
+
+        Ref #1653
+        """
+        if not six.PY2:
+            return val
+        try:
+            return val.encode()
+        except UnicodeEncodeError:
+            pass
+        return val
+
+    def _set_command_options(self, command_obj, option_dict=None):
+        """
+        Set the options for 'command_obj' from 'option_dict'.  Basically
+        this means copying elements of a dictionary ('option_dict') to
+        attributes of an instance ('command').
+
+        'command_obj' must be a Command instance.  If 'option_dict' is not
+        supplied, uses the standard option dictionary for this command
+        (from 'self.command_options').
+
+        (Adopted from distutils.dist.Distribution._set_command_options)
+        """
+        command_name = command_obj.get_command_name()
+        if option_dict is None:
+            option_dict = self.get_option_dict(command_name)
+
+        if DEBUG:
+            self.announce("  setting options for '%s' command:" % command_name)
+        for (option, (source, value)) in option_dict.items():
+            if DEBUG:
+                self.announce("    %s = %s (from %s)" % (option, value,
+                                                         source))
+            try:
+                bool_opts = [translate_longopt(o)
+                             for o in command_obj.boolean_options]
+            except AttributeError:
+                bool_opts = []
+            try:
+                neg_opt = command_obj.negative_opt
+            except AttributeError:
+                neg_opt = {}
+
+            try:
+                is_string = isinstance(value, six.string_types)
+                if option in neg_opt and is_string:
+                    setattr(command_obj, neg_opt[option], not strtobool(value))
+                elif option in bool_opts and is_string:
+                    setattr(command_obj, option, strtobool(value))
+                elif hasattr(command_obj, option):
+                    setattr(command_obj, option, value)
+                else:
+                    raise DistutilsOptionError(
+                        "error in %s: command '%s' has no such option '%s'"
+                        % (source, command_name, option))
+            except ValueError as msg:
+                raise DistutilsOptionError(msg)
+
+    def parse_config_files(self, filenames=None, ignore_option_errors=False):
+        """Parses configuration files from various levels
+        and loads configuration.
+
+        """
+        self._parse_config_files(filenames=filenames)
+
+        parse_configuration(self, self.command_options,
+                            ignore_option_errors=ignore_option_errors)
+        self._finalize_requires()
+
+    def parse_command_line(self):
+        """Process features after parsing command line options"""
+        result = _Distribution.parse_command_line(self)
+        if self.features:
+            self._finalize_features()
+        return result
+
+    def _feature_attrname(self, name):
+        """Convert feature name to corresponding option attribute name"""
+        return 'with_' + name.replace('-', '_')
+
+    def fetch_build_eggs(self, requires):
+        """Resolve pre-setup requirements"""
+        resolved_dists = pkg_resources.working_set.resolve(
+            pkg_resources.parse_requirements(requires),
+            installer=self.fetch_build_egg,
+            replace_conflicting=True,
+        )
+        for dist in resolved_dists:
+            pkg_resources.working_set.add(dist, replace=True)
+        return resolved_dists
+
+    def finalize_options(self):
+        """
+        Allow plugins to apply arbitrary operations to the
+        distribution. Each hook may optionally define a 'order'
+        to influence the order of execution. Smaller numbers
+        go first and the default is 0.
+        """
+        group = 'setuptools.finalize_distribution_options'
+
+        def by_order(hook):
+            return getattr(hook, 'order', 0)
+        eps = map(lambda e: e.load(), pkg_resources.iter_entry_points(group))
+        for ep in sorted(eps, key=by_order):
+            ep(self)
+
+    def _finalize_setup_keywords(self):
+        for ep in pkg_resources.iter_entry_points('distutils.setup_keywords'):
+            value = getattr(self, ep.name, None)
+            if value is not None:
+                ep.require(installer=self.fetch_build_egg)
+                ep.load()(self, ep.name, value)
+
+    def _finalize_2to3_doctests(self):
+        if getattr(self, 'convert_2to3_doctests', None):
+            # XXX may convert to set here when we can rely on set being builtin
+            self.convert_2to3_doctests = [
+                os.path.abspath(p)
+                for p in self.convert_2to3_doctests
+            ]
+        else:
+            self.convert_2to3_doctests = []
+
+    def get_egg_cache_dir(self):
+        egg_cache_dir = os.path.join(os.curdir, '.eggs')
+        if not os.path.exists(egg_cache_dir):
+            os.mkdir(egg_cache_dir)
+            windows_support.hide_file(egg_cache_dir)
+            readme_txt_filename = os.path.join(egg_cache_dir, 'README.txt')
+            with open(readme_txt_filename, 'w') as f:
+                f.write('This directory contains eggs that were downloaded '
+                        'by setuptools to build, test, and run plug-ins.\n\n')
+                f.write('This directory caches those eggs to prevent '
+                        'repeated downloads.\n\n')
+                f.write('However, it is safe to delete this directory.\n\n')
+
+        return egg_cache_dir
+
+    def fetch_build_egg(self, req):
+        """Fetch an egg needed for building"""
+        from setuptools.installer import fetch_build_egg
+        return fetch_build_egg(self, req)
+
+    def _finalize_feature_opts(self):
+        """Add --with-X/--without-X options based on optional features"""
+
+        if not self.features:
+            return
+
+        go = []
+        no = self.negative_opt.copy()
+
+        for name, feature in self.features.items():
+            self._set_feature(name, None)
+            feature.validate(self)
+
+            if feature.optional:
+                descr = feature.description
+                incdef = ' (default)'
+                excdef = ''
+                if not feature.include_by_default():
+                    excdef, incdef = incdef, excdef
+
+                new = (
+                    ('with-' + name, None, 'include ' + descr + incdef),
+                    ('without-' + name, None, 'exclude ' + descr + excdef),
+                )
+                go.extend(new)
+                no['without-' + name] = 'with-' + name
+
+        self.global_options = self.feature_options = go + self.global_options
+        self.negative_opt = self.feature_negopt = no
+
+    def _finalize_features(self):
+        """Add/remove features and resolve dependencies between them"""
+
+        # First, flag all the enabled items (and thus their dependencies)
+        for name, feature in self.features.items():
+            enabled = self.feature_is_included(name)
+            if enabled or (enabled is None and feature.include_by_default()):
+                feature.include_in(self)
+                self._set_feature(name, 1)
+
+        # Then disable the rest, so that off-by-default features don't
+        # get flagged as errors when they're required by an enabled feature
+        for name, feature in self.features.items():
+            if not self.feature_is_included(name):
+                feature.exclude_from(self)
+                self._set_feature(name, 0)
+
+    def get_command_class(self, command):
+        """Pluggable version of get_command_class()"""
+        if command in self.cmdclass:
+            return self.cmdclass[command]
+
+        eps = pkg_resources.iter_entry_points('distutils.commands', command)
+        for ep in eps:
+            ep.require(installer=self.fetch_build_egg)
+            self.cmdclass[command] = cmdclass = ep.load()
+            return cmdclass
+        else:
+            return _Distribution.get_command_class(self, command)
+
+    def print_commands(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.print_commands(self)
+
+    def get_command_list(self):
+        for ep in pkg_resources.iter_entry_points('distutils.commands'):
+            if ep.name not in self.cmdclass:
+                # don't require extras as the commands won't be invoked
+                cmdclass = ep.resolve()
+                self.cmdclass[ep.name] = cmdclass
+        return _Distribution.get_command_list(self)
+
+    def _set_feature(self, name, status):
+        """Set feature's inclusion status"""
+        setattr(self, self._feature_attrname(name), status)
+
+    def feature_is_included(self, name):
+        """Return 1 if feature is included, 0 if excluded, 'None' if unknown"""
+        return getattr(self, self._feature_attrname(name))
+
+    def include_feature(self, name):
+        """Request inclusion of feature named 'name'"""
+
+        if self.feature_is_included(name) == 0:
+            descr = self.features[name].description
+            raise DistutilsOptionError(
+                descr + " is required, but was excluded or is not available"
+            )
+        self.features[name].include_in(self)
+        self._set_feature(name, 1)
+
+    def include(self, **attrs):
+        """Add items to distribution that are named in keyword arguments
+
+        For example, 'dist.include(py_modules=["x"])' would add 'x' to
+        the distribution's 'py_modules' attribute, if it was not already
+        there.
+
+        Currently, this method only supports inclusion for attributes that are
+        lists or tuples.  If you need to add support for adding to other
+        attributes in this or a subclass, you can add an '_include_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'include()'.  So, 'dist.include(foo={"bar":"baz"})'
+        will try to call 'dist._include_foo({"bar":"baz"})', which can then
+        handle whatever special inclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            include = getattr(self, '_include_' + k, None)
+            if include:
+                include(v)
+            else:
+                self._include_misc(k, v)
+
+    def exclude_package(self, package):
+        """Remove packages, modules, and extensions in named package"""
+
+        pfx = package + '.'
+        if self.packages:
+            self.packages = [
+                p for p in self.packages
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.py_modules:
+            self.py_modules = [
+                p for p in self.py_modules
+                if p != package and not p.startswith(pfx)
+            ]
+
+        if self.ext_modules:
+            self.ext_modules = [
+                p for p in self.ext_modules
+                if p.name != package and not p.name.startswith(pfx)
+            ]
+
+    def has_contents_for(self, package):
+        """Return true if 'exclude_package(package)' would do something"""
+
+        pfx = package + '.'
+
+        for p in self.iter_distribution_names():
+            if p == package or p.startswith(pfx):
+                return True
+
+    def _exclude_misc(self, name, value):
+        """Handle 'exclude()' for list/tuple attrs without a special handler"""
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list or tuple (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is not None and not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        elif old:
+            setattr(self, name, [item for item in old if item not in value])
+
+    def _include_misc(self, name, value):
+        """Handle 'include()' for list/tuple attrs without a special handler"""
+
+        if not isinstance(value, sequence):
+            raise DistutilsSetupError(
+                "%s: setting must be a list (%r)" % (name, value)
+            )
+        try:
+            old = getattr(self, name)
+        except AttributeError:
+            raise DistutilsSetupError(
+                "%s: No such distribution setting" % name
+            )
+        if old is None:
+            setattr(self, name, value)
+        elif not isinstance(old, sequence):
+            raise DistutilsSetupError(
+                name + ": this setting cannot be changed via include/exclude"
+            )
+        else:
+            new = [item for item in value if item not in old]
+            setattr(self, name, old + new)
+
+    def exclude(self, **attrs):
+        """Remove items from distribution that are named in keyword arguments
+
+        For example, 'dist.exclude(py_modules=["x"])' would remove 'x' from
+        the distribution's 'py_modules' attribute.  Excluding packages uses
+        the 'exclude_package()' method, so all of the package's contained
+        packages, modules, and extensions are also excluded.
+
+        Currently, this method only supports exclusion from attributes that are
+        lists or tuples.  If you need to add support for excluding from other
+        attributes in this or a subclass, you can add an '_exclude_X' method,
+        where 'X' is the name of the attribute.  The method will be called with
+        the value passed to 'exclude()'.  So, 'dist.exclude(foo={"bar":"baz"})'
+        will try to call 'dist._exclude_foo({"bar":"baz"})', which can then
+        handle whatever special exclusion logic is needed.
+        """
+        for k, v in attrs.items():
+            exclude = getattr(self, '_exclude_' + k, None)
+            if exclude:
+                exclude(v)
+            else:
+                self._exclude_misc(k, v)
+
+    def _exclude_packages(self, packages):
+        if not isinstance(packages, sequence):
+            raise DistutilsSetupError(
+                "packages: setting must be a list or tuple (%r)" % (packages,)
+            )
+        list(map(self.exclude_package, packages))
+
+    def _parse_command_opts(self, parser, args):
+        # Remove --with-X/--without-X options when processing command args
+        self.global_options = self.__class__.global_options
+        self.negative_opt = self.__class__.negative_opt
+
+        # First, expand any aliases
+        command = args[0]
+        aliases = self.get_option_dict('aliases')
+        while command in aliases:
+            src, alias = aliases[command]
+            del aliases[command]  # ensure each alias can expand only once!
+            import shlex
+            args[:1] = shlex.split(alias, True)
+            command = args[0]
+
+        nargs = _Distribution._parse_command_opts(self, parser, args)
+
+        # Handle commands that want to consume all remaining arguments
+        cmd_class = self.get_command_class(command)
+        if getattr(cmd_class, 'command_consumes_arguments', None):
+            self.get_option_dict(command)['args'] = ("command line", nargs)
+            if nargs is not None:
+                return []
+
+        return nargs
+
+    def get_cmdline_options(self):
+        """Return a '{cmd: {opt:val}}' map of all command-line options
+
+        Option names are all long, but do not include the leading '--', and
+        contain dashes rather than underscores.  If the option doesn't take
+        an argument (e.g. '--quiet'), the 'val' is 'None'.
+
+        Note that options provided by config files are intentionally excluded.
+        """
+
+        d = {}
+
+        for cmd, opts in self.command_options.items():
+
+            for opt, (src, val) in opts.items():
+
+                if src != "command line":
+                    continue
+
+                opt = opt.replace('_', '-')
+
+                if val == 0:
+                    cmdobj = self.get_command_obj(cmd)
+                    neg_opt = self.negative_opt.copy()
+                    neg_opt.update(getattr(cmdobj, 'negative_opt', {}))
+                    for neg, pos in neg_opt.items():
+                        if pos == opt:
+                            opt = neg
+                            val = None
+                            break
+                    else:
+                        raise AssertionError("Shouldn't be able to get here")
+
+                elif val == 1:
+                    val = None
+
+                d.setdefault(cmd, {})[opt] = val
+
+        return d
+
+    def iter_distribution_names(self):
+        """Yield all packages, modules, and extension names in distribution"""
+
+        for pkg in self.packages or ():
+            yield pkg
+
+        for module in self.py_modules or ():
+            yield module
+
+        for ext in self.ext_modules or ():
+            if isinstance(ext, tuple):
+                name, buildinfo = ext
+            else:
+                name = ext.name
+            if name.endswith('module'):
+                name = name[:-6]
+            yield name
+
+    def handle_display_options(self, option_order):
+        """If there were any non-global "display-only" options
+        (--help-commands or the metadata display options) on the command
+        line, display the requested info and return true; else return
+        false.
+        """
+        import sys
+
+        if six.PY2 or self.help_commands:
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Stdout may be StringIO (e.g. in tests)
+        if not isinstance(sys.stdout, io.TextIOWrapper):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Don't wrap stdout if utf-8 is already the encoding. Provides
+        #  workaround for #334.
+        if sys.stdout.encoding.lower() in ('utf-8', 'utf8'):
+            return _Distribution.handle_display_options(self, option_order)
+
+        # Print metadata in UTF-8 no matter the platform
+        encoding = sys.stdout.encoding
+        errors = sys.stdout.errors
+        newline = sys.platform != 'win32' and '\n' or None
+        line_buffering = sys.stdout.line_buffering
+
+        sys.stdout = io.TextIOWrapper(
+            sys.stdout.detach(), 'utf-8', errors, newline, line_buffering)
+        try:
+            return _Distribution.handle_display_options(self, option_order)
+        finally:
+            sys.stdout = io.TextIOWrapper(
+                sys.stdout.detach(), encoding, errors, newline, line_buffering)
+
+
+class Feature:
+    """
+    **deprecated** -- The `Feature` facility was never completely implemented
+    or supported, `has reported issues
+    <https://github.com/pypa/setuptools/issues/58>`_ and will be removed in
+    a future version.
+
+    A subset of the distribution that can be excluded if unneeded/wanted
+
+    Features are created using these keyword arguments:
+
+      'description' -- a short, human readable description of the feature, to
+         be used in error messages, and option help messages.
+
+      'standard' -- if true, the feature is included by default if it is
+         available on the current system.  Otherwise, the feature is only
+         included if requested via a command line '--with-X' option, or if
+         another included feature requires it.  The default setting is 'False'.
+
+      'available' -- if true, the feature is available for installation on the
+         current system.  The default setting is 'True'.
+
+      'optional' -- if true, the feature's inclusion can be controlled from the
+         command line, using the '--with-X' or '--without-X' options.  If
+         false, the feature's inclusion status is determined automatically,
+         based on 'availabile', 'standard', and whether any other feature
+         requires it.  The default setting is 'True'.
+
+      'require_features' -- a string or sequence of strings naming features
+         that should also be included if this feature is included.  Defaults to
+         empty list.  May also contain 'Require' objects that should be
+         added/removed from the distribution.
+
+      'remove' -- a string or list of strings naming packages to be removed
+         from the distribution if this feature is *not* included.  If the
+         feature *is* included, this argument is ignored.  This argument exists
+         to support removing features that "crosscut" a distribution, such as
+         defining a 'tests' feature that removes all the 'tests' subpackages
+         provided by other features.  The default for this argument is an empty
+         list.  (Note: the named package(s) or modules must exist in the base
+         distribution when the 'setup()' function is initially called.)
+
+      other keywords -- any other keyword arguments are saved, and passed to
+         the distribution's 'include()' and 'exclude()' methods when the
+         feature is included or excluded, respectively.  So, for example, you
+         could pass 'packages=["a","b"]' to cause packages 'a' and 'b' to be
+         added or removed from the distribution as appropriate.
+
+    A feature must include at least one 'requires', 'remove', or other
+    keyword argument.  Otherwise, it can't affect the distribution in any way.
+    Note also that you can subclass 'Feature' to create your own specialized
+    feature types that modify the distribution in other ways when included or
+    excluded.  See the docstrings for the various methods here for more detail.
+    Aside from the methods, the only feature attributes that distributions look
+    at are 'description' and 'optional'.
+    """
+
+    @staticmethod
+    def warn_deprecated():
+        msg = (
+            "Features are deprecated and will be removed in a future "
+            "version. See https://github.com/pypa/setuptools/issues/65."
+        )
+        warnings.warn(msg, DistDeprecationWarning, stacklevel=3)
+
+    def __init__(
+            self, description, standard=False, available=True,
+            optional=True, require_features=(), remove=(), **extras):
+        self.warn_deprecated()
+
+        self.description = description
+        self.standard = standard
+        self.available = available
+        self.optional = optional
+        if isinstance(require_features, (str, Require)):
+            require_features = require_features,
+
+        self.require_features = [
+            r for r in require_features if isinstance(r, str)
+        ]
+        er = [r for r in require_features if not isinstance(r, str)]
+        if er:
+            extras['require_features'] = er
+
+        if isinstance(remove, str):
+            remove = remove,
+        self.remove = remove
+        self.extras = extras
+
+        if not remove and not require_features and not extras:
+            raise DistutilsSetupError(
+                "Feature %s: must define 'require_features', 'remove', or "
+                "at least one of 'packages', 'py_modules', etc."
+            )
+
+    def include_by_default(self):
+        """Should this feature be included by default?"""
+        return self.available and self.standard
+
+    def include_in(self, dist):
+        """Ensure feature and its requirements are included in distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  Note that this method may be called more than once
+        per feature, and so should be idempotent.
+
+        """
+
+        if not self.available:
+            raise DistutilsPlatformError(
+                self.description + " is required, "
+                "but is not available on this platform"
+            )
+
+        dist.include(**self.extras)
+
+        for f in self.require_features:
+            dist.include_feature(f)
+
+    def exclude_from(self, dist):
+        """Ensure feature is excluded from distribution
+
+        You may override this in a subclass to perform additional operations on
+        the distribution.  This method will be called at most once per
+        feature, and only after all included features have been asked to
+        include themselves.
+        """
+
+        dist.exclude(**self.extras)
+
+        if self.remove:
+            for item in self.remove:
+                dist.exclude_package(item)
+
+    def validate(self, dist):
+        """Verify that feature makes sense in context of distribution
+
+        This method is called by the distribution just before it parses its
+        command line.  It checks to ensure that the 'remove' attribute, if any,
+        contains only valid package/module names that are present in the base
+        distribution when 'setup()' is called.  You may override it in a
+        subclass to perform any other required validation of the feature
+        against a target distribution.
+        """
+
+        for item in self.remove:
+            if not dist.has_contents_for(item):
+                raise DistutilsSetupError(
+                    "%s wants to be able to remove %s, but the distribution"
+                    " doesn't contain any packages or modules under %s"
+                    % (self.description, item, item)
+                )
+
+
+class DistDeprecationWarning(SetuptoolsDeprecationWarning):
+    """Class for warning about deprecations in dist in
+    setuptools. Not ignored by default, unlike DeprecationWarning."""
diff --git a/venv/lib/python3.9/site-packages/setuptools/errors.py b/venv/lib/python3.9/site-packages/setuptools/errors.py
new file mode 100644
index 0000000..2701747
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/errors.py
@@ -0,0 +1,16 @@
+"""setuptools.errors
+
+Provides exceptions used by setuptools modules.
+"""
+
+from distutils.errors import DistutilsError
+
+
+class RemovedCommandError(DistutilsError, RuntimeError):
+    """Error used for commands that have been removed in setuptools.
+
+    Since ``setuptools`` is built on ``distutils``, simply removing a command
+    from ``setuptools`` will make the behavior fall back to ``distutils``; this
+    error is raised if a command exists in ``distutils`` but has been actively
+    removed in ``setuptools``.
+    """
diff --git a/venv/lib/python3.9/site-packages/setuptools/extension.py b/venv/lib/python3.9/site-packages/setuptools/extension.py
new file mode 100644
index 0000000..2946889
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/extension.py
@@ -0,0 +1,57 @@
+import re
+import functools
+import distutils.core
+import distutils.errors
+import distutils.extension
+
+from setuptools.extern.six.moves import map
+
+from .monkey import get_unpatched
+
+
+def _have_cython():
+    """
+    Return True if Cython can be imported.
+    """
+    cython_impl = 'Cython.Distutils.build_ext'
+    try:
+        # from (cython_impl) import build_ext
+        __import__(cython_impl, fromlist=['build_ext']).build_ext
+        return True
+    except Exception:
+        pass
+    return False
+
+
+# for compatibility
+have_pyrex = _have_cython
+
+_Extension = get_unpatched(distutils.core.Extension)
+
+
+class Extension(_Extension):
+    """Extension that uses '.c' files in place of '.pyx' files"""
+
+    def __init__(self, name, sources, *args, **kw):
+        # The *args is needed for compatibility as calls may use positional
+        # arguments. py_limited_api may be set only via keyword.
+        self.py_limited_api = kw.pop("py_limited_api", False)
+        _Extension.__init__(self, name, sources, *args, **kw)
+
+    def _convert_pyx_sources_to_lang(self):
+        """
+        Replace sources with .pyx extensions to sources with the target
+        language extension. This mechanism allows language authors to supply
+        pre-converted sources but to prefer the .pyx sources.
+        """
+        if _have_cython():
+            # the build has Cython, so allow it to compile the .pyx files
+            return
+        lang = self.language or ''
+        target_ext = '.cpp' if lang.lower() == 'c++' else '.c'
+        sub = functools.partial(re.sub, '.pyx$', target_ext)
+        self.sources = list(map(sub, self.sources))
+
+
+class Library(Extension):
+    """Just like a regular Extension, but built as a library instead"""
diff --git a/venv/lib/python3.9/site-packages/setuptools/extern/__init__.py b/venv/lib/python3.9/site-packages/setuptools/extern/__init__.py
new file mode 100644
index 0000000..e8c616f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/extern/__init__.py
@@ -0,0 +1,73 @@
+import sys
+
+
+class VendorImporter:
+    """
+    A PEP 302 meta path importer for finding optionally-vendored
+    or otherwise naturally-installed packages from root_name.
+    """
+
+    def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
+        self.root_name = root_name
+        self.vendored_names = set(vendored_names)
+        self.vendor_pkg = vendor_pkg or root_name.replace('extern', '_vendor')
+
+    @property
+    def search_path(self):
+        """
+        Search first the vendor package then as a natural package.
+        """
+        yield self.vendor_pkg + '.'
+        yield ''
+
+    def find_module(self, fullname, path=None):
+        """
+        Return self when fullname starts with root_name and the
+        target module is one vendored through this importer.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        if root:
+            return
+        if not any(map(target.startswith, self.vendored_names)):
+            return
+        return self
+
+    def load_module(self, fullname):
+        """
+        Iterate over the search path to locate and load fullname.
+        """
+        root, base, target = fullname.partition(self.root_name + '.')
+        for prefix in self.search_path:
+            try:
+                extant = prefix + target
+                __import__(extant)
+                mod = sys.modules[extant]
+                sys.modules[fullname] = mod
+                # mysterious hack:
+                # Remove the reference to the extant package/module
+                # on later Python versions to cause relative imports
+                # in the vendor package to resolve the same modules
+                # as those going through this importer.
+                if sys.version_info >= (3, ):
+                    del sys.modules[extant]
+                return mod
+            except ImportError:
+                pass
+        else:
+            raise ImportError(
+                "The '{target}' package is required; "
+                "normally this is bundled with this package so if you get "
+                "this warning, consult the packager of your "
+                "distribution.".format(**locals())
+            )
+
+    def install(self):
+        """
+        Install this importer into sys.meta_path if not already present.
+        """
+        if self not in sys.meta_path:
+            sys.meta_path.append(self)
+
+
+names = 'six', 'packaging', 'pyparsing', 'ordered_set',
+VendorImporter(__name__, names, 'setuptools._vendor').install()
diff --git a/venv/lib/python3.9/site-packages/setuptools/extern/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/setuptools/extern/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..bc85331
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/extern/__pycache__/__init__.cpython-39.pyc
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/glob.py b/venv/lib/python3.9/site-packages/setuptools/glob.py
new file mode 100644
index 0000000..9d7cbc5
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/glob.py
@@ -0,0 +1,174 @@
+"""
+Filename globbing utility. Mostly a copy of `glob` from Python 3.5.
+
+Changes include:
+ * `yield from` and PEP3102 `*` removed.
+ * Hidden files are not ignored.
+"""
+
+import os
+import re
+import fnmatch
+
+__all__ = ["glob", "iglob", "escape"]
+
+
+def glob(pathname, recursive=False):
+    """Return a list of paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    return list(iglob(pathname, recursive=recursive))
+
+
+def iglob(pathname, recursive=False):
+    """Return an iterator which yields the paths matching a pathname pattern.
+
+    The pattern may contain simple shell-style wildcards a la
+    fnmatch. However, unlike fnmatch, filenames starting with a
+    dot are special cases that are not matched by '*' and '?'
+    patterns.
+
+    If recursive is true, the pattern '**' will match any files and
+    zero or more directories and subdirectories.
+    """
+    it = _iglob(pathname, recursive)
+    if recursive and _isrecursive(pathname):
+        s = next(it)  # skip empty string
+        assert not s
+    return it
+
+
+def _iglob(pathname, recursive):
+    dirname, basename = os.path.split(pathname)
+    if not has_magic(pathname):
+        if basename:
+            if os.path.lexists(pathname):
+                yield pathname
+        else:
+            # Patterns ending with a slash should match only directories
+            if os.path.isdir(dirname):
+                yield pathname
+        return
+    if not dirname:
+        if recursive and _isrecursive(basename):
+            for x in glob2(dirname, basename):
+                yield x
+        else:
+            for x in glob1(dirname, basename):
+                yield x
+        return
+    # `os.path.split()` returns the argument itself as a dirname if it is a
+    # drive or UNC path.  Prevent an infinite recursion if a drive or UNC path
+    # contains magic characters (i.e. r'\\?\C:').
+    if dirname != pathname and has_magic(dirname):
+        dirs = _iglob(dirname, recursive)
+    else:
+        dirs = [dirname]
+    if has_magic(basename):
+        if recursive and _isrecursive(basename):
+            glob_in_dir = glob2
+        else:
+            glob_in_dir = glob1
+    else:
+        glob_in_dir = glob0
+    for dirname in dirs:
+        for name in glob_in_dir(dirname, basename):
+            yield os.path.join(dirname, name)
+
+
+# These 2 helper functions non-recursively glob inside a literal directory.
+# They return a list of basenames. `glob1` accepts a pattern while `glob0`
+# takes a literal basename (so it only has to check for its existence).
+
+
+def glob1(dirname, pattern):
+    if not dirname:
+        if isinstance(pattern, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except OSError:
+        return []
+    return fnmatch.filter(names, pattern)
+
+
+def glob0(dirname, basename):
+    if not basename:
+        # `os.path.split()` returns an empty basename for paths ending with a
+        # directory separator.  'q*x/' should match only directories.
+        if os.path.isdir(dirname):
+            return [basename]
+    else:
+        if os.path.lexists(os.path.join(dirname, basename)):
+            return [basename]
+    return []
+
+
+# This helper function recursively yields relative pathnames inside a literal
+# directory.
+
+
+def glob2(dirname, pattern):
+    assert _isrecursive(pattern)
+    yield pattern[:0]
+    for x in _rlistdir(dirname):
+        yield x
+
+
+# Recursively yields relative pathnames inside a literal directory.
+def _rlistdir(dirname):
+    if not dirname:
+        if isinstance(dirname, bytes):
+            dirname = os.curdir.encode('ASCII')
+        else:
+            dirname = os.curdir
+    try:
+        names = os.listdir(dirname)
+    except os.error:
+        return
+    for x in names:
+        yield x
+        path = os.path.join(dirname, x) if dirname else x
+        for y in _rlistdir(path):
+            yield os.path.join(x, y)
+
+
+magic_check = re.compile('([*?[])')
+magic_check_bytes = re.compile(b'([*?[])')
+
+
+def has_magic(s):
+    if isinstance(s, bytes):
+        match = magic_check_bytes.search(s)
+    else:
+        match = magic_check.search(s)
+    return match is not None
+
+
+def _isrecursive(pattern):
+    if isinstance(pattern, bytes):
+        return pattern == b'**'
+    else:
+        return pattern == '**'
+
+
+def escape(pathname):
+    """Escape all special characters.
+    """
+    # Escaping is done by wrapping any of "*?[" between square brackets.
+    # Metacharacters do not work in the drive part and shouldn't be escaped.
+    drive, pathname = os.path.splitdrive(pathname)
+    if isinstance(pathname, bytes):
+        pathname = magic_check_bytes.sub(br'[\1]', pathname)
+    else:
+        pathname = magic_check.sub(r'[\1]', pathname)
+    return drive + pathname
diff --git a/venv/lib/python3.9/site-packages/setuptools/gui-32.exe b/venv/lib/python3.9/site-packages/setuptools/gui-32.exe
new file mode 100644
index 0000000..f8d3509
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/gui-32.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/gui-64.exe b/venv/lib/python3.9/site-packages/setuptools/gui-64.exe
new file mode 100644
index 0000000..330c51a
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/gui-64.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/gui.exe b/venv/lib/python3.9/site-packages/setuptools/gui.exe
new file mode 100644
index 0000000..f8d3509
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/gui.exe
Binary files differ
diff --git a/venv/lib/python3.9/site-packages/setuptools/installer.py b/venv/lib/python3.9/site-packages/setuptools/installer.py
new file mode 100644
index 0000000..9f8be2e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/installer.py
@@ -0,0 +1,150 @@
+import glob
+import os
+import subprocess
+import sys
+from distutils import log
+from distutils.errors import DistutilsError
+
+import pkg_resources
+from setuptools.command.easy_install import easy_install
+from setuptools.extern import six
+from setuptools.wheel import Wheel
+
+from .py31compat import TemporaryDirectory
+
+
+def _fixup_find_links(find_links):
+    """Ensure find-links option end-up being a list of strings."""
+    if isinstance(find_links, six.string_types):
+        return find_links.split()
+    assert isinstance(find_links, (tuple, list))
+    return find_links
+
+
+def _legacy_fetch_build_egg(dist, req):
+    """Fetch an egg needed for building.
+
+    Legacy path using EasyInstall.
+    """
+    tmp_dist = dist.__class__({'script_args': ['easy_install']})
+    opts = tmp_dist.get_option_dict('easy_install')
+    opts.clear()
+    opts.update(
+        (k, v)
+        for k, v in dist.get_option_dict('easy_install').items()
+        if k in (
+            # don't use any other settings
+            'find_links', 'site_dirs', 'index_url',
+            'optimize', 'site_dirs', 'allow_hosts',
+        ))
+    if dist.dependency_links:
+        links = dist.dependency_links[:]
+        if 'find_links' in opts:
+            links = _fixup_find_links(opts['find_links'][1]) + links
+        opts['find_links'] = ('setup', links)
+    install_dir = dist.get_egg_cache_dir()
+    cmd = easy_install(
+        tmp_dist, args=["x"], install_dir=install_dir,
+        exclude_scripts=True,
+        always_copy=False, build_directory=None, editable=False,
+        upgrade=False, multi_version=True, no_report=True, user=False
+    )
+    cmd.ensure_finalized()
+    return cmd.easy_install(req)
+
+
+def fetch_build_egg(dist, req):
+    """Fetch an egg needed for building.
+
+    Use pip/wheel to fetch/build a wheel."""
+    # Check pip is available.
+    try:
+        pkg_resources.get_distribution('pip')
+    except pkg_resources.DistributionNotFound:
+        dist.announce(
+            'WARNING: The pip package is not available, falling back '
+            'to EasyInstall for handling setup_requires/test_requires; '
+            'this is deprecated and will be removed in a future version.'
+            , log.WARN
+        )
+        return _legacy_fetch_build_egg(dist, req)
+    # Warn if wheel is not.
+    try:
+        pkg_resources.get_distribution('wheel')
+    except pkg_resources.DistributionNotFound:
+        dist.announce('WARNING: The wheel package is not available.', log.WARN)
+    # Ignore environment markers; if supplied, it is required.
+    req = strip_marker(req)
+    # Take easy_install options into account, but do not override relevant
+    # pip environment variables (like PIP_INDEX_URL or PIP_QUIET); they'll
+    # take precedence.
+    opts = dist.get_option_dict('easy_install')
+    if 'allow_hosts' in opts:
+        raise DistutilsError('the `allow-hosts` option is not supported '
+                             'when using pip to install requirements.')
+    if 'PIP_QUIET' in os.environ or 'PIP_VERBOSE' in os.environ:
+        quiet = False
+    else:
+        quiet = True
+    if 'PIP_INDEX_URL' in os.environ:
+        index_url = None
+    elif 'index_url' in opts:
+        index_url = opts['index_url'][1]
+    else:
+        index_url = None
+    if 'find_links' in opts:
+        find_links = _fixup_find_links(opts['find_links'][1])[:]
+    else:
+        find_links = []
+    if dist.dependency_links:
+        find_links.extend(dist.dependency_links)
+    eggs_dir = os.path.realpath(dist.get_egg_cache_dir())
+    environment = pkg_resources.Environment()
+    for egg_dist in pkg_resources.find_distributions(eggs_dir):
+        if egg_dist in req and environment.can_add(egg_dist):
+            return egg_dist
+    with TemporaryDirectory() as tmpdir:
+        cmd = [
+            sys.executable, '-m', 'pip',
+            '--disable-pip-version-check',
+            'wheel', '--no-deps',
+            '-w', tmpdir,
+        ]
+        if quiet:
+            cmd.append('--quiet')
+        if index_url is not None:
+            cmd.extend(('--index-url', index_url))
+        if find_links is not None:
+            for link in find_links:
+                cmd.extend(('--find-links', link))
+        # If requirement is a PEP 508 direct URL, directly pass
+        # the URL to pip, as `req @ url` does not work on the
+        # command line.
+        if req.url:
+            cmd.append(req.url)
+        else:
+            cmd.append(str(req))
+        try:
+            subprocess.check_call(cmd)
+        except subprocess.CalledProcessError as e:
+            raise DistutilsError(str(e))
+        wheel = Wheel(glob.glob(os.path.join(tmpdir, '*.whl'))[0])
+        dist_location = os.path.join(eggs_dir, wheel.egg_name())
+        wheel.install_as_egg(dist_location)
+        dist_metadata = pkg_resources.PathMetadata(
+            dist_location, os.path.join(dist_location, 'EGG-INFO'))
+        dist = pkg_resources.Distribution.from_filename(
+            dist_location, metadata=dist_metadata)
+        return dist
+
+
+def strip_marker(req):
+    """
+    Return a new requirement without the environment marker to avoid
+    calling pip with something like `babel; extra == "i18n"`, which
+    would always be ignored.
+    """
+    # create a copy to avoid mutating the input
+    req = pkg_resources.Requirement.parse(str(req))
+    req.marker = None
+    return req
diff --git a/venv/lib/python3.9/site-packages/setuptools/launch.py b/venv/lib/python3.9/site-packages/setuptools/launch.py
new file mode 100644
index 0000000..308283e
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/launch.py
@@ -0,0 +1,35 @@
+"""
+Launch the Python script on the command line after
+setuptools is bootstrapped via import.
+"""
+
+# Note that setuptools gets imported implicitly by the
+# invocation of this script using python -m setuptools.launch
+
+import tokenize
+import sys
+
+
+def run():
+    """
+    Run the script in sys.argv[1] as if it had
+    been invoked naturally.
+    """
+    __builtins__
+    script_name = sys.argv[1]
+    namespace = dict(
+        __file__=script_name,
+        __name__='__main__',
+        __doc__=None,
+    )
+    sys.argv[:] = sys.argv[1:]
+
+    open_ = getattr(tokenize, 'open', open)
+    script = open_(script_name).read()
+    norm_script = script.replace('\\r\\n', '\\n')
+    code = compile(norm_script, script_name, 'exec')
+    exec(code, namespace)
+
+
+if __name__ == '__main__':
+    run()
diff --git a/venv/lib/python3.9/site-packages/setuptools/lib2to3_ex.py b/venv/lib/python3.9/site-packages/setuptools/lib2to3_ex.py
new file mode 100644
index 0000000..4b1a73f
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/lib2to3_ex.py
@@ -0,0 +1,62 @@
+"""
+Customized Mixin2to3 support:
+
+ - adds support for converting doctests
+
+
+This module raises an ImportError on Python 2.
+"""
+
+from distutils.util import Mixin2to3 as _Mixin2to3
+from distutils import log
+from lib2to3.refactor import RefactoringTool, get_fixers_from_package
+
+import setuptools
+
+
+class DistutilsRefactoringTool(RefactoringTool):
+    def log_error(self, msg, *args, **kw):
+        log.error(msg, *args)
+
+    def log_message(self, msg, *args):
+        log.info(msg, *args)
+
+    def log_debug(self, msg, *args):
+        log.debug(msg, *args)
+
+
+class Mixin2to3(_Mixin2to3):
+    def run_2to3(self, files, doctests=False):
+        # See of the distribution option has been set, otherwise check the
+        # setuptools default.
+        if self.distribution.use_2to3 is not True:
+            return
+        if not files:
+            return
+        log.info("Fixing " + " ".join(files))
+        self.__build_fixer_names()
+        self.__exclude_fixers()
+        if doctests:
+            if setuptools.run_2to3_on_doctests:
+                r = DistutilsRefactoringTool(self.fixer_names)
+                r.refactor(files, write=True, doctests_only=True)
+        else:
+            _Mixin2to3.run_2to3(self, files)
+
+    def __build_fixer_names(self):
+        if self.fixer_names:
+            return
+        self.fixer_names = []
+        for p in setuptools.lib2to3_fixer_packages:
+            self.fixer_names.extend(get_fixers_from_package(p))
+        if self.distribution.use_2to3_fixers is not None:
+            for p in self.distribution.use_2to3_fixers:
+                self.fixer_names.extend(get_fixers_from_package(p))
+
+    def __exclude_fixers(self):
+        excluded_fixers = getattr(self, 'exclude_fixers', [])
+        if self.distribution.use_2to3_exclude_fixers is not None:
+            excluded_fixers.extend(self.distribution.use_2to3_exclude_fixers)
+        for fixer_name in excluded_fixers:
+            if fixer_name in self.fixer_names:
+                self.fixer_names.remove(fixer_name)
diff --git a/venv/lib/python3.9/site-packages/setuptools/monkey.py b/venv/lib/python3.9/site-packages/setuptools/monkey.py
new file mode 100644
index 0000000..3c77f8c
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/monkey.py
@@ -0,0 +1,179 @@
+"""
+Monkey patching of distutils.
+"""
+
+import sys
+import distutils.filelist
+import platform
+import types
+import functools
+from importlib import import_module
+import inspect
+
+from setuptools.extern import six
+
+import setuptools
+
+__all__ = []
+"""
+Everything is private. Contact the project team
+if you think you need this functionality.
+"""
+
+
+def _get_mro(cls):
+    """
+    Returns the bases classes for cls sorted by the MRO.
+
+    Works around an issue on Jython where inspect.getmro will not return all
+    base classes if multiple classes share the same name. Instead, this
+    function will return a tuple containing the class itself, and the contents
+    of cls.__bases__. See https://github.com/pypa/setuptools/issues/1024.
+    """
+    if platform.python_implementation() == "Jython":
+        return (cls,) + cls.__bases__
+    return inspect.getmro(cls)
+
+
+def get_unpatched(item):
+    lookup = (
+        get_unpatched_class if isinstance(item, six.class_types) else
+        get_unpatched_function if isinstance(item, types.FunctionType) else
+        lambda item: None
+    )
+    return lookup(item)
+
+
+def get_unpatched_class(cls):
+    """Protect against re-patching the distutils if reloaded
+
+    Also ensures that no other distutils extension monkeypatched the distutils
+    first.
+    """
+    external_bases = (
+        cls
+        for cls in _get_mro(cls)
+        if not cls.__module__.startswith('setuptools')
+    )
+    base = next(external_bases)
+    if not base.__module__.startswith('distutils'):
+        msg = "distutils has already been patched by %r" % cls
+        raise AssertionError(msg)
+    return base
+
+
+def patch_all():
+    # we can't patch distutils.cmd, alas
+    distutils.core.Command = setuptools.Command
+
+    has_issue_12885 = sys.version_info <= (3, 5, 3)
+
+    if has_issue_12885:
+        # fix findall bug in distutils (http://bugs.python.org/issue12885)
+        distutils.filelist.findall = setuptools.findall
+
+    needs_warehouse = (
+        sys.version_info < (2, 7, 13)
+        or
+        (3, 4) < sys.version_info < (3, 4, 6)
+        or
+        (3, 5) < sys.version_info <= (3, 5, 3)
+    )
+
+    if needs_warehouse:
+        warehouse = 'https://upload.pypi.org/legacy/'
+        distutils.config.PyPIRCCommand.DEFAULT_REPOSITORY = warehouse
+
+    _patch_distribution_metadata()
+
+    # Install Distribution throughout the distutils
+    for module in distutils.dist, distutils.core, distutils.cmd:
+        module.Distribution = setuptools.dist.Distribution
+
+    # Install the patched Extension
+    distutils.core.Extension = setuptools.extension.Extension
+    distutils.extension.Extension = setuptools.extension.Extension
+    if 'distutils.command.build_ext' in sys.modules:
+        sys.modules['distutils.command.build_ext'].Extension = (
+            setuptools.extension.Extension
+        )
+
+    patch_for_msvc_specialized_compiler()
+
+
+def _patch_distribution_metadata():
+    """Patch write_pkg_file and read_pkg_file for higher metadata standards"""
+    for attr in ('write_pkg_file', 'read_pkg_file', 'get_metadata_version'):
+        new_val = getattr(setuptools.dist, attr)
+        setattr(distutils.dist.DistributionMetadata, attr, new_val)
+
+
+def patch_func(replacement, target_mod, func_name):
+    """
+    Patch func_name in target_mod with replacement
+
+    Important - original must be resolved by name to avoid
+    patching an already patched function.
+    """
+    original = getattr(target_mod, func_name)
+
+    # set the 'unpatched' attribute on the replacement to
+    # point to the original.
+    vars(replacement).setdefault('unpatched', original)
+
+    # replace the function in the original module
+    setattr(target_mod, func_name, replacement)
+
+
+def get_unpatched_function(candidate):
+    return getattr(candidate, 'unpatched')
+
+
+def patch_for_msvc_specialized_compiler():
+    """
+    Patch functions in distutils to use standalone Microsoft Visual C++
+    compilers.
+    """
+    # import late to avoid circular imports on Python < 3.5
+    msvc = import_module('setuptools.msvc')
+
+    if platform.system() != 'Windows':
+        # Compilers only availables on Microsoft Windows
+        return
+
+    def patch_params(mod_name, func_name):
+        """
+        Prepare the parameters for patch_func to patch indicated function.
+        """
+        repl_prefix = 'msvc9_' if 'msvc9' in mod_name else 'msvc14_'
+        repl_name = repl_prefix + func_name.lstrip('_')
+        repl = getattr(msvc, repl_name)
+        mod = import_module(mod_name)
+        if not hasattr(mod, func_name):
+            raise ImportError(func_name)
+        return repl, mod, func_name
+
+    # Python 2.7 to 3.4
+    msvc9 = functools.partial(patch_params, 'distutils.msvc9compiler')
+
+    # Python 3.5+
+    msvc14 = functools.partial(patch_params, 'distutils._msvccompiler')
+
+    try:
+        # Patch distutils.msvc9compiler
+        patch_func(*msvc9('find_vcvarsall'))
+        patch_func(*msvc9('query_vcvarsall'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler._get_vc_env
+        patch_func(*msvc14('_get_vc_env'))
+    except ImportError:
+        pass
+
+    try:
+        # Patch distutils._msvccompiler.gen_lib_options for Numpy
+        patch_func(*msvc14('gen_lib_options'))
+    except ImportError:
+        pass
diff --git a/venv/lib/python3.9/site-packages/setuptools/msvc.py b/venv/lib/python3.9/site-packages/setuptools/msvc.py
new file mode 100644
index 0000000..2ffe1c8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/msvc.py
@@ -0,0 +1,1679 @@
+"""
+Improved support for Microsoft Visual C++ compilers.
+
+Known supported compilers:
+--------------------------
+Microsoft Visual C++ 9.0:
+    Microsoft Visual C++ Compiler for Python 2.7 (x86, amd64)
+    Microsoft Windows SDK 6.1 (x86, x64, ia64)
+    Microsoft Windows SDK 7.0 (x86, x64, ia64)
+
+Microsoft Visual C++ 10.0:
+    Microsoft Windows SDK 7.1 (x86, x64, ia64)
+
+Microsoft Visual C++ 14.X:
+    Microsoft Visual C++ Build Tools 2015 (x86, x64, arm)
+    Microsoft Visual Studio Build Tools 2017 (x86, x64, arm, arm64)
+    Microsoft Visual Studio Build Tools 2019 (x86, x64, arm, arm64)
+
+This may also support compilers shipped with compatible Visual Studio versions.
+"""
+
+import json
+from io import open
+from os import listdir, pathsep
+from os.path import join, isfile, isdir, dirname
+import sys
+import platform
+import itertools
+import distutils.errors
+from setuptools.extern.packaging.version import LegacyVersion
+
+from setuptools.extern.six.moves import filterfalse
+
+from .monkey import get_unpatched
+
+if platform.system() == 'Windows':
+    from setuptools.extern.six.moves import winreg
+    from os import environ
+else:
+    # Mock winreg and environ so the module can be imported on this platform.
+
+    class winreg:
+        HKEY_USERS = None
+        HKEY_CURRENT_USER = None
+        HKEY_LOCAL_MACHINE = None
+        HKEY_CLASSES_ROOT = None
+
+    environ = dict()
+
+_msvc9_suppress_errors = (
+    # msvc9compiler isn't available on some platforms
+    ImportError,
+
+    # msvc9compiler raises DistutilsPlatformError in some
+    # environments. See #1118.
+    distutils.errors.DistutilsPlatformError,
+)
+
+try:
+    from distutils.msvc9compiler import Reg
+except _msvc9_suppress_errors:
+    pass
+
+
+def msvc9_find_vcvarsall(version):
+    """
+    Patched "distutils.msvc9compiler.find_vcvarsall" to use the standalone
+    compiler build for Python
+    (VCForPython / Microsoft Visual C++ Compiler for Python 2.7).
+
+    Fall back to original behavior when the standalone compiler is not
+    available.
+
+    Redirect the path of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    version: float
+        Required Microsoft Visual C++ version.
+
+    Return
+    ------
+    str
+        vcvarsall.bat path
+    """
+    vc_base = r'Software\%sMicrosoft\DevDiv\VCForPython\%0.1f'
+    key = vc_base % ('', version)
+    try:
+        # Per-user installs register the compiler path here
+        productdir = Reg.get_value(key, "installdir")
+    except KeyError:
+        try:
+            # All-user installs on a 64-bit system register here
+            key = vc_base % ('Wow6432Node\\', version)
+            productdir = Reg.get_value(key, "installdir")
+        except KeyError:
+            productdir = None
+
+    if productdir:
+        vcvarsall = join(productdir, "vcvarsall.bat")
+        if isfile(vcvarsall):
+            return vcvarsall
+
+    return get_unpatched(msvc9_find_vcvarsall)(version)
+
+
+def msvc9_query_vcvarsall(ver, arch='x86', *args, **kwargs):
+    """
+    Patched "distutils.msvc9compiler.query_vcvarsall" for support extra
+    Microsoft Visual C++ 9.0 and 10.0 compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    ver: float
+        Required Microsoft Visual C++ version.
+    arch: str
+        Target architecture.
+
+    Return
+    ------
+    dict
+        environment
+    """
+    # Try to get environment from vcvarsall.bat (Classical way)
+    try:
+        orig = get_unpatched(msvc9_query_vcvarsall)
+        return orig(ver, arch, *args, **kwargs)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error if Vcvarsall.bat is missing
+        pass
+    except ValueError:
+        # Pass error if environment not set after executing vcvarsall.bat
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(arch, ver).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, ver, arch)
+        raise
+
+
+def msvc14_get_vc_env(plat_spec):
+    """
+    Patched "distutils._msvccompiler._get_vc_env" for support extra
+    Microsoft Visual C++ 14.X compilers.
+
+    Set environment without use of "vcvarsall.bat".
+
+    Parameters
+    ----------
+    plat_spec: str
+        Target architecture.
+
+    Return
+    ------
+    dict
+        environment
+    """
+    # Try to get environment from vcvarsall.bat (Classical way)
+    try:
+        return get_unpatched(msvc14_get_vc_env)(plat_spec)
+    except distutils.errors.DistutilsPlatformError:
+        # Pass error Vcvarsall.bat is missing
+        pass
+
+    # If error, try to set environment directly
+    try:
+        return EnvironmentInfo(plat_spec, vc_min_ver=14.0).return_env()
+    except distutils.errors.DistutilsPlatformError as exc:
+        _augment_exception(exc, 14.0)
+        raise
+
+
+def msvc14_gen_lib_options(*args, **kwargs):
+    """
+    Patched "distutils._msvccompiler.gen_lib_options" for fix
+    compatibility between "numpy.distutils" and "distutils._msvccompiler"
+    (for Numpy < 1.11.2)
+    """
+    if "numpy.distutils" in sys.modules:
+        import numpy as np
+        if LegacyVersion(np.__version__) < LegacyVersion('1.11.2'):
+            return np.distutils.ccompiler.gen_lib_options(*args, **kwargs)
+    return get_unpatched(msvc14_gen_lib_options)(*args, **kwargs)
+
+
+def _augment_exception(exc, version, arch=''):
+    """
+    Add details to the exception message to help guide the user
+    as to what action will resolve it.
+    """
+    # Error if MSVC++ directory not found or environment not set
+    message = exc.args[0]
+
+    if "vcvarsall" in message.lower() or "visual c" in message.lower():
+        # Special error message if MSVC++ not installed
+        tmpl = 'Microsoft Visual C++ {version:0.1f} is required.'
+        message = tmpl.format(**locals())
+        msdownload = 'www.microsoft.com/download/details.aspx?id=%d'
+        if version == 9.0:
+            if arch.lower().find('ia64') > -1:
+                # For VC++ 9.0, if IA64 support is needed, redirect user
+                # to Windows SDK 7.0.
+                # Note: No download link available from Microsoft.
+                message += ' Get it with "Microsoft Windows SDK 7.0"'
+            else:
+                # For VC++ 9.0 redirect user to Vc++ for Python 2.7 :
+                # This redirection link is maintained by Microsoft.
+                # Contact vspython@microsoft.com if it needs updating.
+                message += ' Get it from http://aka.ms/vcpython27'
+        elif version == 10.0:
+            # For VC++ 10.0 Redirect user to Windows SDK 7.1
+            message += ' Get it with "Microsoft Windows SDK 7.1": '
+            message += msdownload % 8279
+        elif version >= 14.0:
+            # For VC++ 14.X Redirect user to latest Visual C++ Build Tools
+            message += (' Get it with "Build Tools for Visual Studio": '
+                        r'https://visualstudio.microsoft.com/downloads/')
+
+    exc.args = (message, )
+
+
+class PlatformInfo:
+    """
+    Current and Target Architectures information.
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    """
+    current_cpu = environ.get('processor_architecture', '').lower()
+
+    def __init__(self, arch):
+        self.arch = arch.lower().replace('x64', 'amd64')
+
+    @property
+    def target_cpu(self):
+        """
+        Return Target CPU architecture.
+
+        Return
+        ------
+        str
+            Target CPU
+        """
+        return self.arch[self.arch.find('_') + 1:]
+
+    def target_is_x86(self):
+        """
+        Return True if target CPU is x86 32 bits..
+
+        Return
+        ------
+        bool
+            CPU is x86 32 bits
+        """
+        return self.target_cpu == 'x86'
+
+    def current_is_x86(self):
+        """
+        Return True if current CPU is x86 32 bits..
+
+        Return
+        ------
+        bool
+            CPU is x86 32 bits
+        """
+        return self.current_cpu == 'x86'
+
+    def current_dir(self, hidex86=False, x64=False):
+        """
+        Current platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        str
+            subfolder: '\target', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.current_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.current_cpu == 'amd64' and x64) else
+            r'\%s' % self.current_cpu
+        )
+
+    def target_dir(self, hidex86=False, x64=False):
+        r"""
+        Target platform specific subfolder.
+
+        Parameters
+        ----------
+        hidex86: bool
+            return '' and not '\x86' if architecture is x86.
+        x64: bool
+            return '\x64' and not '\amd64' if architecture is amd64.
+
+        Return
+        ------
+        str
+            subfolder: '\current', or '' (see hidex86 parameter)
+        """
+        return (
+            '' if (self.target_cpu == 'x86' and hidex86) else
+            r'\x64' if (self.target_cpu == 'amd64' and x64) else
+            r'\%s' % self.target_cpu
+        )
+
+    def cross_dir(self, forcex86=False):
+        r"""
+        Cross platform specific subfolder.
+
+        Parameters
+        ----------
+        forcex86: bool
+            Use 'x86' as current architecture even if current architecture is
+            not x86.
+
+        Return
+        ------
+        str
+            subfolder: '' if target architecture is current architecture,
+            '\current_target' if not.
+        """
+        current = 'x86' if forcex86 else self.current_cpu
+        return (
+            '' if self.target_cpu == current else
+            self.target_dir().replace('\\', '\\%s_' % current)
+        )
+
+
+class RegistryInfo:
+    """
+    Microsoft Visual Studio related registry information.
+
+    Parameters
+    ----------
+    platform_info: PlatformInfo
+        "PlatformInfo" instance.
+    """
+    HKEYS = (winreg.HKEY_USERS,
+             winreg.HKEY_CURRENT_USER,
+             winreg.HKEY_LOCAL_MACHINE,
+             winreg.HKEY_CLASSES_ROOT)
+
+    def __init__(self, platform_info):
+        self.pi = platform_info
+
+    @property
+    def visualstudio(self):
+        """
+        Microsoft Visual Studio root registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return 'VisualStudio'
+
+    @property
+    def sxs(self):
+        """
+        Microsoft Visual Studio SxS registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.visualstudio, 'SxS')
+
+    @property
+    def vc(self):
+        """
+        Microsoft Visual C++ VC7 registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.sxs, 'VC7')
+
+    @property
+    def vs(self):
+        """
+        Microsoft Visual Studio VS7 registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.sxs, 'VS7')
+
+    @property
+    def vc_for_python(self):
+        """
+        Microsoft Visual C++ for Python registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return r'DevDiv\VCForPython'
+
+    @property
+    def microsoft_sdk(self):
+        """
+        Microsoft SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return 'Microsoft SDKs'
+
+    @property
+    def windows_sdk(self):
+        """
+        Microsoft Windows/Platform SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.microsoft_sdk, 'Windows')
+
+    @property
+    def netfx_sdk(self):
+        """
+        Microsoft .NET Framework SDK registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return join(self.microsoft_sdk, 'NETFXSDK')
+
+    @property
+    def windows_kits_roots(self):
+        """
+        Microsoft Windows Kits Roots registry key.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        return r'Windows Kits\Installed Roots'
+
+    def microsoft(self, key, x86=False):
+        """
+        Return key in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        x86: str
+            Force x86 software registry.
+
+        Return
+        ------
+        str
+            Registry key
+        """
+        node64 = '' if self.pi.current_is_x86() or x86 else 'Wow6432Node'
+        return join('Software', node64, 'Microsoft', key)
+
+    def lookup(self, key, name):
+        """
+        Look for values in registry in Microsoft software registry.
+
+        Parameters
+        ----------
+        key: str
+            Registry key path where look.
+        name: str
+            Value name to find.
+
+        Return
+        ------
+        str
+            value
+        """
+        key_read = winreg.KEY_READ
+        openkey = winreg.OpenKey
+        ms = self.microsoft
+        for hkey in self.HKEYS:
+            try:
+                bkey = openkey(hkey, ms(key), 0, key_read)
+            except (OSError, IOError):
+                if not self.pi.current_is_x86():
+                    try:
+                        bkey = openkey(hkey, ms(key, True), 0, key_read)
+                    except (OSError, IOError):
+                        continue
+                else:
+                    continue
+            try:
+                return winreg.QueryValueEx(bkey, name)[0]
+            except (OSError, IOError):
+                pass
+
+
+class SystemInfo:
+    """
+    Microsoft Windows and Visual Studio related system information.
+
+    Parameters
+    ----------
+    registry_info: RegistryInfo
+        "RegistryInfo" instance.
+    vc_ver: float
+        Required Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparison.
+    WinDir = environ.get('WinDir', '')
+    ProgramFiles = environ.get('ProgramFiles', '')
+    ProgramFilesx86 = environ.get('ProgramFiles(x86)', ProgramFiles)
+
+    def __init__(self, registry_info, vc_ver=None):
+        self.ri = registry_info
+        self.pi = self.ri.pi
+
+        self.known_vs_paths = self.find_programdata_vs_vers()
+
+        # Except for VS15+, VC version is aligned with VS version
+        self.vs_ver = self.vc_ver = (
+                vc_ver or self._find_latest_available_vs_ver())
+
+    def _find_latest_available_vs_ver(self):
+        """
+        Find the latest VC version
+
+        Return
+        ------
+        float
+            version
+        """
+        reg_vc_vers = self.find_reg_vs_vers()
+
+        if not (reg_vc_vers or self.known_vs_paths):
+            raise distutils.errors.DistutilsPlatformError(
+                'No Microsoft Visual C++ version found')
+
+        vc_vers = set(reg_vc_vers)
+        vc_vers.update(self.known_vs_paths)
+        return sorted(vc_vers)[-1]
+
+    def find_reg_vs_vers(self):
+        """
+        Find Microsoft Visual Studio versions available in registry.
+
+        Return
+        ------
+        list of float
+            Versions
+        """
+        ms = self.ri.microsoft
+        vckeys = (self.ri.vc, self.ri.vc_for_python, self.ri.vs)
+        vs_vers = []
+        for hkey in self.ri.HKEYS:
+            for key in vckeys:
+                try:
+                    bkey = winreg.OpenKey(hkey, ms(key), 0, winreg.KEY_READ)
+                except (OSError, IOError):
+                    continue
+                subkeys, values, _ = winreg.QueryInfoKey(bkey)
+                for i in range(values):
+                    try:
+                        ver = float(winreg.EnumValue(bkey, i)[0])
+                        if ver not in vs_vers:
+                            vs_vers.append(ver)
+                    except ValueError:
+                        pass
+                for i in range(subkeys):
+                    try:
+                        ver = float(winreg.EnumKey(bkey, i))
+                        if ver not in vs_vers:
+                            vs_vers.append(ver)
+                    except ValueError:
+                        pass
+        return sorted(vs_vers)
+
+    def find_programdata_vs_vers(self):
+        r"""
+        Find Visual studio 2017+ versions from information in
+        "C:\ProgramData\Microsoft\VisualStudio\Packages\_Instances".
+
+        Return
+        ------
+        dict
+            float version as key, path as value.
+        """
+        vs_versions = {}
+        instances_dir = \
+            r'C:\ProgramData\Microsoft\VisualStudio\Packages\_Instances'
+
+        try:
+            hashed_names = listdir(instances_dir)
+
+        except (OSError, IOError):
+            # Directory not exists with all Visual Studio versions
+            return vs_versions
+
+        for name in hashed_names:
+            try:
+                # Get VS installation path from "state.json" file
+                state_path = join(instances_dir, name, 'state.json')
+                with open(state_path, 'rt', encoding='utf-8') as state_file:
+                    state = json.load(state_file)
+                vs_path = state['installationPath']
+
+                # Raises OSError if this VS installation does not contain VC
+                listdir(join(vs_path, r'VC\Tools\MSVC'))
+
+                # Store version and path
+                vs_versions[self._as_float_version(
+                    state['installationVersion'])] = vs_path
+
+            except (OSError, IOError, KeyError):
+                # Skip if "state.json" file is missing or bad format
+                continue
+
+        return vs_versions
+
+    @staticmethod
+    def _as_float_version(version):
+        """
+        Return a string version as a simplified float version (major.minor)
+
+        Parameters
+        ----------
+        version: str
+            Version.
+
+        Return
+        ------
+        float
+            version
+        """
+        return float('.'.join(version.split('.')[:2]))
+
+    @property
+    def VSInstallDir(self):
+        """
+        Microsoft Visual Studio directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        default = join(self.ProgramFilesx86,
+                       'Microsoft Visual Studio %0.1f' % self.vs_ver)
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vs, '%0.1f' % self.vs_ver) or default
+
+    @property
+    def VCInstallDir(self):
+        """
+        Microsoft Visual C++ directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        path = self._guess_vc() or self._guess_vc_legacy()
+
+        if not isdir(path):
+            msg = 'Microsoft Visual C++ directory not found'
+            raise distutils.errors.DistutilsPlatformError(msg)
+
+        return path
+
+    def _guess_vc(self):
+        """
+        Locate Visual C++ for VS2017+.
+
+        Return
+        ------
+        str
+            path
+        """
+        if self.vs_ver <= 14.0:
+            return ''
+
+        try:
+            # First search in known VS paths
+            vs_dir = self.known_vs_paths[self.vs_ver]
+        except KeyError:
+            # Else, search with path from registry
+            vs_dir = self.VSInstallDir
+
+        guess_vc = join(vs_dir, r'VC\Tools\MSVC')
+
+        # Subdir with VC exact version as name
+        try:
+            # Update the VC version with real one instead of VS version
+            vc_ver = listdir(guess_vc)[-1]
+            self.vc_ver = self._as_float_version(vc_ver)
+            return join(guess_vc, vc_ver)
+        except (OSError, IOError, IndexError):
+            return ''
+
+    def _guess_vc_legacy(self):
+        """
+        Locate Visual C++ for versions prior to 2017.
+
+        Return
+        ------
+        str
+            path
+        """
+        default = join(self.ProgramFilesx86,
+                       r'Microsoft Visual Studio %0.1f\VC' % self.vs_ver)
+
+        # Try to get "VC++ for Python" path from registry as default path
+        reg_path = join(self.ri.vc_for_python, '%0.1f' % self.vs_ver)
+        python_vc = self.ri.lookup(reg_path, 'installdir')
+        default_vc = join(python_vc, 'VC') if python_vc else default
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, '%0.1f' % self.vs_ver) or default_vc
+
+    @property
+    def WindowsSdkVersion(self):
+        """
+        Microsoft Windows SDK versions for specified MSVC++ version.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        if self.vs_ver <= 9.0:
+            return '7.0', '6.1', '6.0a'
+        elif self.vs_ver == 10.0:
+            return '7.1', '7.0a'
+        elif self.vs_ver == 11.0:
+            return '8.0', '8.0a'
+        elif self.vs_ver == 12.0:
+            return '8.1', '8.1a'
+        elif self.vs_ver >= 14.0:
+            return '10.0', '8.1'
+
+    @property
+    def WindowsSdkLastVersion(self):
+        """
+        Microsoft Windows SDK last version.
+
+        Return
+        ------
+        str
+            version
+        """
+        return self._use_last_dir_name(join(self.WindowsSdkDir, 'lib'))
+
+    @property
+    def WindowsSdkDir(self):
+        """
+        Microsoft Windows SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        sdkdir = ''
+        for ver in self.WindowsSdkVersion:
+            # Try to get it from registry
+            loc = join(self.ri.windows_sdk, 'v%s' % ver)
+            sdkdir = self.ri.lookup(loc, 'installationfolder')
+            if sdkdir:
+                break
+        if not sdkdir or not isdir(sdkdir):
+            # Try to get "VC++ for Python" version from registry
+            path = join(self.ri.vc_for_python, '%0.1f' % self.vc_ver)
+            install_base = self.ri.lookup(path, 'installdir')
+            if install_base:
+                sdkdir = join(install_base, 'WinSDK')
+        if not sdkdir or not isdir(sdkdir):
+            # If fail, use default new path
+            for ver in self.WindowsSdkVersion:
+                intver = ver[:ver.rfind('.')]
+                path = r'Microsoft SDKs\Windows Kits\%s' % intver
+                d = join(self.ProgramFiles, path)
+                if isdir(d):
+                    sdkdir = d
+        if not sdkdir or not isdir(sdkdir):
+            # If fail, use default old path
+            for ver in self.WindowsSdkVersion:
+                path = r'Microsoft SDKs\Windows\v%s' % ver
+                d = join(self.ProgramFiles, path)
+                if isdir(d):
+                    sdkdir = d
+        if not sdkdir:
+            # If fail, use Platform SDK
+            sdkdir = join(self.VCInstallDir, 'PlatformSDK')
+        return sdkdir
+
+    @property
+    def WindowsSDKExecutablePath(self):
+        """
+        Microsoft Windows SDK executable directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Find WinSDK NetFx Tools registry dir name
+        if self.vs_ver <= 11.0:
+            netfxver = 35
+            arch = ''
+        else:
+            netfxver = 40
+            hidex86 = True if self.vs_ver <= 12.0 else False
+            arch = self.pi.current_dir(x64=True, hidex86=hidex86)
+        fx = 'WinSDK-NetFx%dTools%s' % (netfxver, arch.replace('\\', '-'))
+
+        # list all possibles registry paths
+        regpaths = []
+        if self.vs_ver >= 14.0:
+            for ver in self.NetFxSdkVersion:
+                regpaths += [join(self.ri.netfx_sdk, ver, fx)]
+
+        for ver in self.WindowsSdkVersion:
+            regpaths += [join(self.ri.windows_sdk, 'v%sA' % ver, fx)]
+
+        # Return installation folder from the more recent path
+        for path in regpaths:
+            execpath = self.ri.lookup(path, 'installationfolder')
+            if execpath:
+                return execpath
+
+    @property
+    def FSharpInstallDir(self):
+        """
+        Microsoft Visual F# directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        path = join(self.ri.visualstudio, r'%0.1f\Setup\F#' % self.vs_ver)
+        return self.ri.lookup(path, 'productdir') or ''
+
+    @property
+    def UniversalCRTSdkDir(self):
+        """
+        Microsoft Universal CRT SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Set Kit Roots versions for specified MSVC++ version
+        vers = ('10', '81') if self.vs_ver >= 14.0 else ()
+
+        # Find path of the more recent Kit
+        for ver in vers:
+            sdkdir = self.ri.lookup(self.ri.windows_kits_roots,
+                                    'kitsroot%s' % ver)
+            if sdkdir:
+                return sdkdir or ''
+
+    @property
+    def UniversalCRTSdkLastVersion(self):
+        """
+        Microsoft Universal C Runtime SDK last version.
+
+        Return
+        ------
+        str
+            version
+        """
+        return self._use_last_dir_name(join(self.UniversalCRTSdkDir, 'lib'))
+
+    @property
+    def NetFxSdkVersion(self):
+        """
+        Microsoft .NET Framework SDK versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        # Set FxSdk versions for specified VS version
+        return (('4.7.2', '4.7.1', '4.7',
+                 '4.6.2', '4.6.1', '4.6',
+                 '4.5.2', '4.5.1', '4.5')
+                if self.vs_ver >= 14.0 else ())
+
+    @property
+    def NetFxSdkDir(self):
+        """
+        Microsoft .NET Framework SDK directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        sdkdir = ''
+        for ver in self.NetFxSdkVersion:
+            loc = join(self.ri.netfx_sdk, ver)
+            sdkdir = self.ri.lookup(loc, 'kitsinstallationfolder')
+            if sdkdir:
+                break
+        return sdkdir
+
+    @property
+    def FrameworkDir32(self):
+        """
+        Microsoft .NET Framework 32bit directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        guess_fw = join(self.WinDir, r'Microsoft.NET\Framework')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir32') or guess_fw
+
+    @property
+    def FrameworkDir64(self):
+        """
+        Microsoft .NET Framework 64bit directory.
+
+        Return
+        ------
+        str
+            path
+        """
+        # Default path
+        guess_fw = join(self.WinDir, r'Microsoft.NET\Framework64')
+
+        # Try to get path from registry, if fail use default path
+        return self.ri.lookup(self.ri.vc, 'frameworkdir64') or guess_fw
+
+    @property
+    def FrameworkVersion32(self):
+        """
+        Microsoft .NET Framework 32bit versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        return self._find_dot_net_versions(32)
+
+    @property
+    def FrameworkVersion64(self):
+        """
+        Microsoft .NET Framework 64bit versions.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        return self._find_dot_net_versions(64)
+
+    def _find_dot_net_versions(self, bits):
+        """
+        Find Microsoft .NET Framework versions.
+
+        Parameters
+        ----------
+        bits: int
+            Platform number of bits: 32 or 64.
+
+        Return
+        ------
+        tuple of str
+            versions
+        """
+        # Find actual .NET version in registry
+        reg_ver = self.ri.lookup(self.ri.vc, 'frameworkver%d' % bits)
+        dot_net_dir = getattr(self, 'FrameworkDir%d' % bits)
+        ver = reg_ver or self._use_last_dir_name(dot_net_dir, 'v') or ''
+
+        # Set .NET versions for specified MSVC++ version
+        if self.vs_ver >= 12.0:
+            return ver, 'v4.0'
+        elif self.vs_ver >= 10.0:
+            return 'v4.0.30319' if ver.lower()[:2] != 'v4' else ver, 'v3.5'
+        elif self.vs_ver == 9.0:
+            return 'v3.5', 'v2.0.50727'
+        elif self.vs_ver == 8.0:
+            return 'v3.0', 'v2.0.50727'
+
+    @staticmethod
+    def _use_last_dir_name(path, prefix=''):
+        """
+        Return name of the last dir in path or '' if no dir found.
+
+        Parameters
+        ----------
+        path: str
+            Use dirs in this path
+        prefix: str
+            Use only dirs starting by this prefix
+
+        Return
+        ------
+        str
+            name
+        """
+        matching_dirs = (
+            dir_name
+            for dir_name in reversed(listdir(path))
+            if isdir(join(path, dir_name)) and
+            dir_name.startswith(prefix)
+        )
+        return next(matching_dirs, None) or ''
+
+
+class EnvironmentInfo:
+    """
+    Return environment variables for specified Microsoft Visual C++ version
+    and platform : Lib, Include, Path and libpath.
+
+    This function is compatible with Microsoft Visual C++ 9.0 to 14.X.
+
+    Script created by analysing Microsoft environment configuration files like
+    "vcvars[...].bat", "SetEnv.Cmd", "vcbuildtools.bat", ...
+
+    Parameters
+    ----------
+    arch: str
+        Target architecture.
+    vc_ver: float
+        Required Microsoft Visual C++ version. If not set, autodetect the last
+        version.
+    vc_min_ver: float
+        Minimum Microsoft Visual C++ version.
+    """
+
+    # Variables and properties in this class use originals CamelCase variables
+    # names from Microsoft source files for more easy comparison.
+
+    def __init__(self, arch, vc_ver=None, vc_min_ver=0):
+        self.pi = PlatformInfo(arch)
+        self.ri = RegistryInfo(self.pi)
+        self.si = SystemInfo(self.ri, vc_ver)
+
+        if self.vc_ver < vc_min_ver:
+            err = 'No suitable Microsoft Visual C++ version found'
+            raise distutils.errors.DistutilsPlatformError(err)
+
+    @property
+    def vs_ver(self):
+        """
+        Microsoft Visual Studio.
+
+        Return
+        ------
+        float
+            version
+        """
+        return self.si.vs_ver
+
+    @property
+    def vc_ver(self):
+        """
+        Microsoft Visual C++ version.
+
+        Return
+        ------
+        float
+            version
+        """
+        return self.si.vc_ver
+
+    @property
+    def VSTools(self):
+        """
+        Microsoft Visual Studio Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        paths = [r'Common7\IDE', r'Common7\Tools']
+
+        if self.vs_ver >= 14.0:
+            arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            paths += [r'Common7\IDE\CommonExtensions\Microsoft\TestWindow']
+            paths += [r'Team Tools\Performance Tools']
+            paths += [r'Team Tools\Performance Tools%s' % arch_subdir]
+
+        return [join(self.si.VSInstallDir, path) for path in paths]
+
+    @property
+    def VCIncludes(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Includes.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return [join(self.si.VCInstallDir, 'Include'),
+                join(self.si.VCInstallDir, r'ATLMFC\Include')]
+
+    @property
+    def VCLibraries(self):
+        """
+        Microsoft Visual C++ & Microsoft Foundation Class Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver >= 15.0:
+            arch_subdir = self.pi.target_dir(x64=True)
+        else:
+            arch_subdir = self.pi.target_dir(hidex86=True)
+        paths = ['Lib%s' % arch_subdir, r'ATLMFC\Lib%s' % arch_subdir]
+
+        if self.vs_ver >= 14.0:
+            paths += [r'Lib\store%s' % arch_subdir]
+
+        return [join(self.si.VCInstallDir, path) for path in paths]
+
+    @property
+    def VCStoreRefs(self):
+        """
+        Microsoft Visual C++ store references Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+        return [join(self.si.VCInstallDir, r'Lib\store\references')]
+
+    @property
+    def VCTools(self):
+        """
+        Microsoft Visual C++ Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        si = self.si
+        tools = [join(si.VCInstallDir, 'VCPackages')]
+
+        forcex86 = True if self.vs_ver <= 10.0 else False
+        arch_subdir = self.pi.cross_dir(forcex86)
+        if arch_subdir:
+            tools += [join(si.VCInstallDir, 'Bin%s' % arch_subdir)]
+
+        if self.vs_ver == 14.0:
+            path = 'Bin%s' % self.pi.current_dir(hidex86=True)
+            tools += [join(si.VCInstallDir, path)]
+
+        elif self.vs_ver >= 15.0:
+            host_dir = (r'bin\HostX86%s' if self.pi.current_is_x86() else
+                        r'bin\HostX64%s')
+            tools += [join(
+                si.VCInstallDir, host_dir % self.pi.target_dir(x64=True))]
+
+            if self.pi.current_cpu != self.pi.target_cpu:
+                tools += [join(
+                    si.VCInstallDir, host_dir % self.pi.current_dir(x64=True))]
+
+        else:
+            tools += [join(si.VCInstallDir, 'Bin')]
+
+        return tools
+
+    @property
+    def OSLibraries(self):
+        """
+        Microsoft Windows SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver <= 10.0:
+            arch_subdir = self.pi.target_dir(hidex86=True, x64=True)
+            return [join(self.si.WindowsSdkDir, 'Lib%s' % arch_subdir)]
+
+        else:
+            arch_subdir = self.pi.target_dir(x64=True)
+            lib = join(self.si.WindowsSdkDir, 'lib')
+            libver = self._sdk_subdir
+            return [join(lib, '%sum%s' % (libver , arch_subdir))]
+
+    @property
+    def OSIncludes(self):
+        """
+        Microsoft Windows SDK Include.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        include = join(self.si.WindowsSdkDir, 'include')
+
+        if self.vs_ver <= 10.0:
+            return [include, join(include, 'gl')]
+
+        else:
+            if self.vs_ver >= 14.0:
+                sdkver = self._sdk_subdir
+            else:
+                sdkver = ''
+            return [join(include, '%sshared' % sdkver),
+                    join(include, '%sum' % sdkver),
+                    join(include, '%swinrt' % sdkver)]
+
+    @property
+    def OSLibpath(self):
+        """
+        Microsoft Windows SDK Libraries Paths.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        ref = join(self.si.WindowsSdkDir, 'References')
+        libpath = []
+
+        if self.vs_ver <= 9.0:
+            libpath += self.OSLibraries
+
+        if self.vs_ver >= 11.0:
+            libpath += [join(ref, r'CommonConfiguration\Neutral')]
+
+        if self.vs_ver >= 14.0:
+            libpath += [
+                ref,
+                join(self.si.WindowsSdkDir, 'UnionMetadata'),
+                join(ref, 'Windows.Foundation.UniversalApiContract', '1.0.0.0'),
+                join(ref, 'Windows.Foundation.FoundationContract', '1.0.0.0'),
+                join(ref,'Windows.Networking.Connectivity.WwanContract',
+                     '1.0.0.0'),
+                join(self.si.WindowsSdkDir, 'ExtensionSDKs', 'Microsoft.VCLibs',
+                     '%0.1f' % self.vs_ver, 'References', 'CommonConfiguration',
+                     'neutral'),
+            ]
+        return libpath
+
+    @property
+    def SdkTools(self):
+        """
+        Microsoft Windows SDK Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return list(self._sdk_tools())
+
+    def _sdk_tools(self):
+        """
+        Microsoft Windows SDK Tools paths generator.
+
+        Return
+        ------
+        generator of str
+            paths
+        """
+        if self.vs_ver < 15.0:
+            bin_dir = 'Bin' if self.vs_ver <= 11.0 else r'Bin\x86'
+            yield join(self.si.WindowsSdkDir, bin_dir)
+
+        if not self.pi.current_is_x86():
+            arch_subdir = self.pi.current_dir(x64=True)
+            path = 'Bin%s' % arch_subdir
+            yield join(self.si.WindowsSdkDir, path)
+
+        if self.vs_ver in (10.0, 11.0):
+            if self.pi.target_is_x86():
+                arch_subdir = ''
+            else:
+                arch_subdir = self.pi.current_dir(hidex86=True, x64=True)
+            path = r'Bin\NETFX 4.0 Tools%s' % arch_subdir
+            yield join(self.si.WindowsSdkDir, path)
+
+        elif self.vs_ver >= 15.0:
+            path = join(self.si.WindowsSdkDir, 'Bin')
+            arch_subdir = self.pi.current_dir(x64=True)
+            sdkver = self.si.WindowsSdkLastVersion
+            yield join(path, '%s%s' % (sdkver, arch_subdir))
+
+        if self.si.WindowsSDKExecutablePath:
+            yield self.si.WindowsSDKExecutablePath
+
+    @property
+    def _sdk_subdir(self):
+        """
+        Microsoft Windows SDK version subdir.
+
+        Return
+        ------
+        str
+            subdir
+        """
+        ucrtver = self.si.WindowsSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def SdkSetup(self):
+        """
+        Microsoft Windows SDK Setup.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver > 9.0:
+            return []
+
+        return [join(self.si.WindowsSdkDir, 'Setup')]
+
+    @property
+    def FxTools(self):
+        """
+        Microsoft .NET Framework Tools.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        pi = self.pi
+        si = self.si
+
+        if self.vs_ver <= 10.0:
+            include32 = True
+            include64 = not pi.target_is_x86() and not pi.current_is_x86()
+        else:
+            include32 = pi.target_is_x86() or pi.current_is_x86()
+            include64 = pi.current_cpu == 'amd64' or pi.target_cpu == 'amd64'
+
+        tools = []
+        if include32:
+            tools += [join(si.FrameworkDir32, ver)
+                      for ver in si.FrameworkVersion32]
+        if include64:
+            tools += [join(si.FrameworkDir64, ver)
+                      for ver in si.FrameworkVersion64]
+        return tools
+
+    @property
+    def NetFxSDKLibraries(self):
+        """
+        Microsoft .Net Framework SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        return [join(self.si.NetFxSdkDir, r'lib\um%s' % arch_subdir)]
+
+    @property
+    def NetFxSDKIncludes(self):
+        """
+        Microsoft .Net Framework SDK Includes.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0 or not self.si.NetFxSdkDir:
+            return []
+
+        return [join(self.si.NetFxSdkDir, r'include\um')]
+
+    @property
+    def VsTDb(self):
+        """
+        Microsoft Visual Studio Team System Database.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        return [join(self.si.VSInstallDir, r'VSTSDB\Deploy')]
+
+    @property
+    def MSBuild(self):
+        """
+        Microsoft Build Engine.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 12.0:
+            return []
+        elif self.vs_ver < 15.0:
+            base_path = self.si.ProgramFilesx86
+            arch_subdir = self.pi.current_dir(hidex86=True)
+        else:
+            base_path = self.si.VSInstallDir
+            arch_subdir = ''
+
+        path = r'MSBuild\%0.1f\bin%s' % (self.vs_ver, arch_subdir)
+        build = [join(base_path, path)]
+
+        if self.vs_ver >= 15.0:
+            # Add Roslyn C# & Visual Basic Compiler
+            build += [join(base_path, path, 'Roslyn')]
+
+        return build
+
+    @property
+    def HTMLHelpWorkshop(self):
+        """
+        Microsoft HTML Help Workshop.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 11.0:
+            return []
+
+        return [join(self.si.ProgramFilesx86, 'HTML Help Workshop')]
+
+    @property
+    def UCRTLibraries(self):
+        """
+        Microsoft Universal C Runtime SDK Libraries.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+
+        arch_subdir = self.pi.target_dir(x64=True)
+        lib = join(self.si.UniversalCRTSdkDir, 'lib')
+        ucrtver = self._ucrt_subdir
+        return [join(lib, '%sucrt%s' % (ucrtver, arch_subdir))]
+
+    @property
+    def UCRTIncludes(self):
+        """
+        Microsoft Universal C Runtime SDK Include.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if self.vs_ver < 14.0:
+            return []
+
+        include = join(self.si.UniversalCRTSdkDir, 'include')
+        return [join(include, '%sucrt' % self._ucrt_subdir)]
+
+    @property
+    def _ucrt_subdir(self):
+        """
+        Microsoft Universal C Runtime SDK version subdir.
+
+        Return
+        ------
+        str
+            subdir
+        """
+        ucrtver = self.si.UniversalCRTSdkLastVersion
+        return ('%s\\' % ucrtver) if ucrtver else ''
+
+    @property
+    def FSharp(self):
+        """
+        Microsoft Visual F#.
+
+        Return
+        ------
+        list of str
+            paths
+        """
+        if 11.0 > self.vs_ver > 12.0:
+            return []
+
+        return [self.si.FSharpInstallDir]
+
+    @property
+    def VCRuntimeRedist(self):
+        """
+        Microsoft Visual C++ runtime redistributable dll.
+
+        Return
+        ------
+        str
+            path
+        """
+        vcruntime = 'vcruntime%d0.dll' % self.vc_ver
+        arch_subdir = self.pi.target_dir(x64=True).strip('\\')
+
+        # Installation prefixes candidates
+        prefixes = []
+        tools_path = self.si.VCInstallDir
+        redist_path = dirname(tools_path.replace(r'\Tools', r'\Redist'))
+        if isdir(redist_path):
+            # Redist version may not be exactly the same as tools
+            redist_path = join(redist_path, listdir(redist_path)[-1])
+            prefixes += [redist_path, join(redist_path, 'onecore')]
+
+        prefixes += [join(tools_path, 'redist')]  # VS14 legacy path
+
+        # CRT directory
+        crt_dirs = ('Microsoft.VC%d.CRT' % (self.vc_ver * 10),
+                    # Sometime store in directory with VS version instead of VC
+                    'Microsoft.VC%d.CRT' % (int(self.vs_ver) * 10))
+
+        # vcruntime path
+        for prefix, crt_dir in itertools.product(prefixes, crt_dirs):
+            path = join(prefix, arch_subdir, crt_dir, vcruntime)
+            if isfile(path):
+                return path
+
+    def return_env(self, exists=True):
+        """
+        Return environment dict.
+
+        Parameters
+        ----------
+        exists: bool
+            It True, only return existing paths.
+
+        Return
+        ------
+        dict
+            environment
+        """
+        env = dict(
+            include=self._build_paths('include',
+                                      [self.VCIncludes,
+                                       self.OSIncludes,
+                                       self.UCRTIncludes,
+                                       self.NetFxSDKIncludes],
+                                      exists),
+            lib=self._build_paths('lib',
+                                  [self.VCLibraries,
+                                   self.OSLibraries,
+                                   self.FxTools,
+                                   self.UCRTLibraries,
+                                   self.NetFxSDKLibraries],
+                                  exists),
+            libpath=self._build_paths('libpath',
+                                      [self.VCLibraries,
+                                       self.FxTools,
+                                       self.VCStoreRefs,
+                                       self.OSLibpath],
+                                      exists),
+            path=self._build_paths('path',
+                                   [self.VCTools,
+                                    self.VSTools,
+                                    self.VsTDb,
+                                    self.SdkTools,
+                                    self.SdkSetup,
+                                    self.FxTools,
+                                    self.MSBuild,
+                                    self.HTMLHelpWorkshop,
+                                    self.FSharp],
+                                   exists),
+        )
+        if self.vs_ver >= 14 and isfile(self.VCRuntimeRedist):
+            env['py_vcruntime_redist'] = self.VCRuntimeRedist
+        return env
+
+    def _build_paths(self, name, spec_path_lists, exists):
+        """
+        Given an environment variable name and specified paths,
+        return a pathsep-separated string of paths containing
+        unique, extant, directories from those paths and from
+        the environment variable. Raise an error if no paths
+        are resolved.
+
+        Parameters
+        ----------
+        name: str
+            Environment variable name
+        spec_path_lists: list of str
+            Paths
+        exists: bool
+            It True, only return existing paths.
+
+        Return
+        ------
+        str
+            Pathsep-separated paths
+        """
+        # flatten spec_path_lists
+        spec_paths = itertools.chain.from_iterable(spec_path_lists)
+        env_paths = environ.get(name, '').split(pathsep)
+        paths = itertools.chain(spec_paths, env_paths)
+        extant_paths = list(filter(isdir, paths)) if exists else paths
+        if not extant_paths:
+            msg = "%s environment variable is empty" % name.upper()
+            raise distutils.errors.DistutilsPlatformError(msg)
+        unique_paths = self._unique_everseen(extant_paths)
+        return pathsep.join(unique_paths)
+
+    # from Python docs
+    @staticmethod
+    def _unique_everseen(iterable, key=None):
+        """
+        List unique elements, preserving order.
+        Remember all elements ever seen.
+
+        _unique_everseen('AAAABBBCCDAABBB') --> A B C D
+
+        _unique_everseen('ABBCcAD', str.lower) --> A B C D
+        """
+        seen = set()
+        seen_add = seen.add
+        if key is None:
+            for element in filterfalse(seen.__contains__, iterable):
+                seen_add(element)
+                yield element
+        else:
+            for element in iterable:
+                k = key(element)
+                if k not in seen:
+                    seen_add(k)
+                    yield element
diff --git a/venv/lib/python3.9/site-packages/setuptools/namespaces.py b/venv/lib/python3.9/site-packages/setuptools/namespaces.py
new file mode 100644
index 0000000..dc16106
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/namespaces.py
@@ -0,0 +1,107 @@
+import os
+from distutils import log
+import itertools
+
+from setuptools.extern.six.moves import map
+
+
+flatten = itertools.chain.from_iterable
+
+
+class Installer:
+
+    nspkg_ext = '-nspkg.pth'
+
+    def install_namespaces(self):
+        nsp = self._get_all_ns_packages()
+        if not nsp:
+            return
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        self.outputs.append(filename)
+        log.info("Installing %s", filename)
+        lines = map(self._gen_nspkg_line, nsp)
+
+        if self.dry_run:
+            # always generate the lines, even in dry run
+            list(lines)
+            return
+
+        with open(filename, 'wt') as f:
+            f.writelines(lines)
+
+    def uninstall_namespaces(self):
+        filename, ext = os.path.splitext(self._get_target())
+        filename += self.nspkg_ext
+        if not os.path.exists(filename):
+            return
+        log.info("Removing %s", filename)
+        os.remove(filename)
+
+    def _get_target(self):
+        return self.target
+
+    _nspkg_tmpl = (
+        "import sys, types, os",
+        "has_mfs = sys.version_info > (3, 5)",
+        "p = os.path.join(%(root)s, *%(pth)r)",
+        "importlib = has_mfs and __import__('importlib.util')",
+        "has_mfs and __import__('importlib.machinery')",
+        "m = has_mfs and "
+            "sys.modules.setdefault(%(pkg)r, "
+                "importlib.util.module_from_spec("
+                    "importlib.machinery.PathFinder.find_spec(%(pkg)r, "
+                        "[os.path.dirname(p)])))",
+        "m = m or "
+            "sys.modules.setdefault(%(pkg)r, types.ModuleType(%(pkg)r))",
+        "mp = (m or []) and m.__dict__.setdefault('__path__',[])",
+        "(p not in mp) and mp.append(p)",
+    )
+    "lines for the namespace installer"
+
+    _nspkg_tmpl_multi = (
+        'm and setattr(sys.modules[%(parent)r], %(child)r, m)',
+    )
+    "additional line(s) when a parent package is indicated"
+
+    def _get_root(self):
+        return "sys._getframe(1).f_locals['sitedir']"
+
+    def _gen_nspkg_line(self, pkg):
+        # ensure pkg is not a unicode string under Python 2.7
+        pkg = str(pkg)
+        pth = tuple(pkg.split('.'))
+        root = self._get_root()
+        tmpl_lines = self._nspkg_tmpl
+        parent, sep, child = pkg.rpartition('.')
+        if parent:
+            tmpl_lines += self._nspkg_tmpl_multi
+        return ';'.join(tmpl_lines) % locals() + '\n'
+
+    def _get_all_ns_packages(self):
+        """Return sorted list of all package namespaces"""
+        pkgs = self.distribution.namespace_packages or []
+        return sorted(flatten(map(self._pkg_names, pkgs)))
+
+    @staticmethod
+    def _pkg_names(pkg):
+        """
+        Given a namespace package, yield the components of that
+        package.
+
+        >>> names = Installer._pkg_names('a.b.c')
+        >>> set(names) == set(['a', 'a.b', 'a.b.c'])
+        True
+        """
+        parts = pkg.split('.')
+        while parts:
+            yield '.'.join(parts)
+            parts.pop()
+
+
+class DevelopInstaller(Installer):
+    def _get_root(self):
+        return repr(str(self.egg_path))
+
+    def _get_target(self):
+        return self.egg_link
diff --git a/venv/lib/python3.9/site-packages/setuptools/package_index.py b/venv/lib/python3.9/site-packages/setuptools/package_index.py
new file mode 100644
index 0000000..f419d47
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/package_index.py
@@ -0,0 +1,1136 @@
+"""PyPI and direct package downloading"""
+import sys
+import os
+import re
+import shutil
+import socket
+import base64
+import hashlib
+import itertools
+import warnings
+from functools import wraps
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import urllib, http_client, configparser, map
+
+import setuptools
+from pkg_resources import (
+    CHECKOUT_DIST, Distribution, BINARY_DIST, normalize_path, SOURCE_DIST,
+    Environment, find_distributions, safe_name, safe_version,
+    to_filename, Requirement, DEVELOP_DIST, EGG_DIST,
+)
+from setuptools import ssl_support
+from distutils import log
+from distutils.errors import DistutilsError
+from fnmatch import translate
+from setuptools.py27compat import get_all_headers
+from setuptools.py33compat import unescape
+from setuptools.wheel import Wheel
+
+__metaclass__ = type
+
+EGG_FRAGMENT = re.compile(r'^egg=([-A-Za-z0-9_.+!]+)$')
+HREF = re.compile(r"""href\s*=\s*['"]?([^'"> ]+)""", re.I)
+PYPI_MD5 = re.compile(
+    r'<a href="([^"#]+)">([^<]+)</a>\n\s+\(<a (?:title="MD5 hash"\n\s+)'
+    r'href="[^?]+\?:action=show_md5&amp;digest=([0-9a-f]{32})">md5</a>\)'
+)
+URL_SCHEME = re.compile('([-+.a-z0-9]{2,}):', re.I).match
+EXTENSIONS = ".tar.gz .tar.bz2 .tar .zip .tgz".split()
+
+__all__ = [
+    'PackageIndex', 'distros_for_url', 'parse_bdist_wininst',
+    'interpret_distro_name',
+]
+
+_SOCKET_TIMEOUT = 15
+
+_tmpl = "setuptools/{setuptools.__version__} Python-urllib/{py_major}"
+user_agent = _tmpl.format(py_major='{}.{}'.format(*sys.version_info), setuptools=setuptools)
+
+
+def parse_requirement_arg(spec):
+    try:
+        return Requirement.parse(spec)
+    except ValueError:
+        raise DistutilsError(
+            "Not a URL, existing file, or requirement spec: %r" % (spec,)
+        )
+
+
+def parse_bdist_wininst(name):
+    """Return (base,pyversion) or (None,None) for possible .exe name"""
+
+    lower = name.lower()
+    base, py_ver, plat = None, None, None
+
+    if lower.endswith('.exe'):
+        if lower.endswith('.win32.exe'):
+            base = name[:-10]
+            plat = 'win32'
+        elif lower.startswith('.win32-py', -16):
+            py_ver = name[-7:-4]
+            base = name[:-16]
+            plat = 'win32'
+        elif lower.endswith('.win-amd64.exe'):
+            base = name[:-14]
+            plat = 'win-amd64'
+        elif lower.startswith('.win-amd64-py', -20):
+            py_ver = name[-7:-4]
+            base = name[:-20]
+            plat = 'win-amd64'
+    return base, py_ver, plat
+
+
+def egg_info_for_url(url):
+    parts = urllib.parse.urlparse(url)
+    scheme, server, path, parameters, query, fragment = parts
+    base = urllib.parse.unquote(path.split('/')[-1])
+    if server == 'sourceforge.net' and base == 'download':  # XXX Yuck
+        base = urllib.parse.unquote(path.split('/')[-2])
+    if '#' in base:
+        base, fragment = base.split('#', 1)
+    return base, fragment
+
+
+def distros_for_url(url, metadata=None):
+    """Yield egg or source distribution objects that might be found at a URL"""
+    base, fragment = egg_info_for_url(url)
+    for dist in distros_for_location(url, base, metadata):
+        yield dist
+    if fragment:
+        match = EGG_FRAGMENT.match(fragment)
+        if match:
+            for dist in interpret_distro_name(
+                url, match.group(1), metadata, precedence=CHECKOUT_DIST
+            ):
+                yield dist
+
+
+def distros_for_location(location, basename, metadata=None):
+    """Yield egg or source distribution objects based on basename"""
+    if basename.endswith('.egg.zip'):
+        basename = basename[:-4]  # strip the .zip
+    if basename.endswith('.egg') and '-' in basename:
+        # only one, unambiguous interpretation
+        return [Distribution.from_location(location, basename, metadata)]
+    if basename.endswith('.whl') and '-' in basename:
+        wheel = Wheel(basename)
+        if not wheel.is_compatible():
+            return []
+        return [Distribution(
+            location=location,
+            project_name=wheel.project_name,
+            version=wheel.version,
+            # Increase priority over eggs.
+            precedence=EGG_DIST + 1,
+        )]
+    if basename.endswith('.exe'):
+        win_base, py_ver, platform = parse_bdist_wininst(basename)
+        if win_base is not None:
+            return interpret_distro_name(
+                location, win_base, metadata, py_ver, BINARY_DIST, platform
+            )
+    # Try source distro extensions (.zip, .tgz, etc.)
+    #
+    for ext in EXTENSIONS:
+        if basename.endswith(ext):
+            basename = basename[:-len(ext)]
+            return interpret_distro_name(location, basename, metadata)
+    return []  # no extension matched
+
+
+def distros_for_filename(filename, metadata=None):
+    """Yield possible egg or source distribution objects based on a filename"""
+    return distros_for_location(
+        normalize_path(filename), os.path.basename(filename), metadata
+    )
+
+
+def interpret_distro_name(
+        location, basename, metadata, py_version=None, precedence=SOURCE_DIST,
+        platform=None
+):
+    """Generate alternative interpretations of a source distro name
+
+    Note: if `location` is a filesystem filename, you should call
+    ``pkg_resources.normalize_path()`` on it before passing it to this
+    routine!
+    """
+    # Generate alternative interpretations of a source distro name
+    # Because some packages are ambiguous as to name/versions split
+    # e.g. "adns-python-1.1.0", "egenix-mx-commercial", etc.
+    # So, we generate each possible interepretation (e.g. "adns, python-1.1.0"
+    # "adns-python, 1.1.0", and "adns-python-1.1.0, no version").  In practice,
+    # the spurious interpretations should be ignored, because in the event
+    # there's also an "adns" package, the spurious "python-1.1.0" version will
+    # compare lower than any numeric version number, and is therefore unlikely
+    # to match a request for it.  It's still a potential problem, though, and
+    # in the long run PyPI and the distutils should go for "safe" names and
+    # versions in distribution archive names (sdist and bdist).
+
+    parts = basename.split('-')
+    if not py_version and any(re.match(r'py\d\.\d$', p) for p in parts[2:]):
+        # it is a bdist_dumb, not an sdist -- bail out
+        return
+
+    for p in range(1, len(parts) + 1):
+        yield Distribution(
+            location, metadata, '-'.join(parts[:p]), '-'.join(parts[p:]),
+            py_version=py_version, precedence=precedence,
+            platform=platform
+        )
+
+
+# From Python 2.7 docs
+def unique_everseen(iterable, key=None):
+    "List unique elements, preserving order. Remember all elements ever seen."
+    # unique_everseen('AAAABBBCCDAABBB') --> A B C D
+    # unique_everseen('ABBCcAD', str.lower) --> A B C D
+    seen = set()
+    seen_add = seen.add
+    if key is None:
+        for element in six.moves.filterfalse(seen.__contains__, iterable):
+            seen_add(element)
+            yield element
+    else:
+        for element in iterable:
+            k = key(element)
+            if k not in seen:
+                seen_add(k)
+                yield element
+
+
+def unique_values(func):
+    """
+    Wrap a function returning an iterable such that the resulting iterable
+    only ever yields unique items.
+    """
+
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        return unique_everseen(func(*args, **kwargs))
+
+    return wrapper
+
+
+REL = re.compile(r"""<([^>]*\srel\s*=\s*['"]?([^'">]+)[^>]*)>""", re.I)
+# this line is here to fix emacs' cruddy broken syntax highlighting
+
+
+@unique_values
+def find_external_links(url, page):
+    """Find rel="homepage" and rel="download" links in `page`, yielding URLs"""
+
+    for match in REL.finditer(page):
+        tag, rel = match.groups()
+        rels = set(map(str.strip, rel.lower().split(',')))
+        if 'homepage' in rels or 'download' in rels:
+            for match in HREF.finditer(tag):
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+    for tag in ("<th>Home Page", "<th>Download URL"):
+        pos = page.find(tag)
+        if pos != -1:
+            match = HREF.search(page, pos)
+            if match:
+                yield urllib.parse.urljoin(url, htmldecode(match.group(1)))
+
+
+class ContentChecker:
+    """
+    A null content checker that defines the interface for checking content
+    """
+
+    def feed(self, block):
+        """
+        Feed a block of data to the hash.
+        """
+        return
+
+    def is_valid(self):
+        """
+        Check the hash. Return False if validation fails.
+        """
+        return True
+
+    def report(self, reporter, template):
+        """
+        Call reporter with information about the checker (hash name)
+        substituted into the template.
+        """
+        return
+
+
+class HashChecker(ContentChecker):
+    pattern = re.compile(
+        r'(?P<hash_name>sha1|sha224|sha384|sha256|sha512|md5)='
+        r'(?P<expected>[a-f0-9]+)'
+    )
+
+    def __init__(self, hash_name, expected):
+        self.hash_name = hash_name
+        self.hash = hashlib.new(hash_name)
+        self.expected = expected
+
+    @classmethod
+    def from_url(cls, url):
+        "Construct a (possibly null) ContentChecker from a URL"
+        fragment = urllib.parse.urlparse(url)[-1]
+        if not fragment:
+            return ContentChecker()
+        match = cls.pattern.search(fragment)
+        if not match:
+            return ContentChecker()
+        return cls(**match.groupdict())
+
+    def feed(self, block):
+        self.hash.update(block)
+
+    def is_valid(self):
+        return self.hash.hexdigest() == self.expected
+
+    def report(self, reporter, template):
+        msg = template % self.hash_name
+        return reporter(msg)
+
+
+class PackageIndex(Environment):
+    """A distribution index that scans web pages for download URLs"""
+
+    def __init__(
+            self, index_url="https://pypi.org/simple/", hosts=('*',),
+            ca_bundle=None, verify_ssl=True, *args, **kw
+    ):
+        Environment.__init__(self, *args, **kw)
+        self.index_url = index_url + "/" [:not index_url.endswith('/')]
+        self.scanned_urls = {}
+        self.fetched_urls = {}
+        self.package_pages = {}
+        self.allows = re.compile('|'.join(map(translate, hosts))).match
+        self.to_scan = []
+        use_ssl = (
+            verify_ssl
+            and ssl_support.is_available
+            and (ca_bundle or ssl_support.find_ca_bundle())
+        )
+        if use_ssl:
+            self.opener = ssl_support.opener_for(ca_bundle)
+        else:
+            self.opener = urllib.request.urlopen
+
+    def process_url(self, url, retrieve=False):
+        """Evaluate a URL as a possible download, and maybe retrieve it"""
+        if url in self.scanned_urls and not retrieve:
+            return
+        self.scanned_urls[url] = True
+        if not URL_SCHEME(url):
+            self.process_filename(url)
+            return
+        else:
+            dists = list(distros_for_url(url))
+            if dists:
+                if not self.url_ok(url):
+                    return
+                self.debug("Found link: %s", url)
+
+        if dists or not retrieve or url in self.fetched_urls:
+            list(map(self.add, dists))
+            return  # don't need the actual page
+
+        if not self.url_ok(url):
+            self.fetched_urls[url] = True
+            return
+
+        self.info("Reading %s", url)
+        self.fetched_urls[url] = True  # prevent multiple fetch attempts
+        tmpl = "Download error on %s: %%s -- Some packages may not be found!"
+        f = self.open_url(url, tmpl % url)
+        if f is None:
+            return
+        self.fetched_urls[f.url] = True
+        if 'html' not in f.headers.get('content-type', '').lower():
+            f.close()  # not html, we can't process it
+            return
+
+        base = f.url  # handle redirects
+        page = f.read()
+        if not isinstance(page, str):
+            # In Python 3 and got bytes but want str.
+            if isinstance(f, urllib.error.HTTPError):
+                # Errors have no charset, assume latin1:
+                charset = 'latin-1'
+            else:
+                charset = f.headers.get_param('charset') or 'latin-1'
+            page = page.decode(charset, "ignore")
+        f.close()
+        for match in HREF.finditer(page):
+            link = urllib.parse.urljoin(base, htmldecode(match.group(1)))
+            self.process_url(link)
+        if url.startswith(self.index_url) and getattr(f, 'code', None) != 404:
+            page = self.process_index(url, page)
+
+    def process_filename(self, fn, nested=False):
+        # process filenames or directories
+        if not os.path.exists(fn):
+            self.warn("Not found: %s", fn)
+            return
+
+        if os.path.isdir(fn) and not nested:
+            path = os.path.realpath(fn)
+            for item in os.listdir(path):
+                self.process_filename(os.path.join(path, item), True)
+
+        dists = distros_for_filename(fn)
+        if dists:
+            self.debug("Found: %s", fn)
+            list(map(self.add, dists))
+
+    def url_ok(self, url, fatal=False):
+        s = URL_SCHEME(url)
+        is_file = s and s.group(1).lower() == 'file'
+        if is_file or self.allows(urllib.parse.urlparse(url)[1]):
+            return True
+        msg = (
+            "\nNote: Bypassing %s (disallowed host; see "
+            "http://bit.ly/2hrImnY for details).\n")
+        if fatal:
+            raise DistutilsError(msg % url)
+        else:
+            self.warn(msg, url)
+
+    def scan_egg_links(self, search_path):
+        dirs = filter(os.path.isdir, search_path)
+        egg_links = (
+            (path, entry)
+            for path in dirs
+            for entry in os.listdir(path)
+            if entry.endswith('.egg-link')
+        )
+        list(itertools.starmap(self.scan_egg_link, egg_links))
+
+    def scan_egg_link(self, path, entry):
+        with open(os.path.join(path, entry)) as raw_lines:
+            # filter non-empty lines
+            lines = list(filter(None, map(str.strip, raw_lines)))
+
+        if len(lines) != 2:
+            # format is not recognized; punt
+            return
+
+        egg_path, setup_path = lines
+
+        for dist in find_distributions(os.path.join(path, egg_path)):
+            dist.location = os.path.join(path, *lines)
+            dist.precedence = SOURCE_DIST
+            self.add(dist)
+
+    def process_index(self, url, page):
+        """Process the contents of a PyPI page"""
+
+        def scan(link):
+            # Process a URL to see if it's for a package page
+            if link.startswith(self.index_url):
+                parts = list(map(
+                    urllib.parse.unquote, link[len(self.index_url):].split('/')
+                ))
+                if len(parts) == 2 and '#' not in parts[1]:
+                    # it's a package page, sanitize and index it
+                    pkg = safe_name(parts[0])
+                    ver = safe_version(parts[1])
+                    self.package_pages.setdefault(pkg.lower(), {})[link] = True
+                    return to_filename(pkg), to_filename(ver)
+            return None, None
+
+        # process an index page into the package-page index
+        for match in HREF.finditer(page):
+            try:
+                scan(urllib.parse.urljoin(url, htmldecode(match.group(1))))
+            except ValueError:
+                pass
+
+        pkg, ver = scan(url)  # ensure this page is in the page index
+        if pkg:
+            # process individual package page
+            for new_url in find_external_links(url, page):
+                # Process the found URL
+                base, frag = egg_info_for_url(new_url)
+                if base.endswith('.py') and not frag:
+                    if ver:
+                        new_url += '#egg=%s-%s' % (pkg, ver)
+                    else:
+                        self.need_version_info(url)
+                self.scan_url(new_url)
+
+            return PYPI_MD5.sub(
+                lambda m: '<a href="%s#md5=%s">%s</a>' % m.group(1, 3, 2), page
+            )
+        else:
+            return ""  # no sense double-scanning non-package pages
+
+    def need_version_info(self, url):
+        self.scan_all(
+            "Page at %s links to .py file(s) without version info; an index "
+            "scan is required.", url
+        )
+
+    def scan_all(self, msg=None, *args):
+        if self.index_url not in self.fetched_urls:
+            if msg:
+                self.warn(msg, *args)
+            self.info(
+                "Scanning index of all packages (this may take a while)"
+            )
+        self.scan_url(self.index_url)
+
+    def find_packages(self, requirement):
+        self.scan_url(self.index_url + requirement.unsafe_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # Fall back to safe version of the name
+            self.scan_url(self.index_url + requirement.project_name + '/')
+
+        if not self.package_pages.get(requirement.key):
+            # We couldn't find the target package, so search the index page too
+            self.not_found_in_index(requirement)
+
+        for url in list(self.package_pages.get(requirement.key, ())):
+            # scan each page that might be related to the desired package
+            self.scan_url(url)
+
+    def obtain(self, requirement, installer=None):
+        self.prescan()
+        self.find_packages(requirement)
+        for dist in self[requirement.key]:
+            if dist in requirement:
+                return dist
+            self.debug("%s does not match %s", requirement, dist)
+        return super(PackageIndex, self).obtain(requirement, installer)
+
+    def check_hash(self, checker, filename, tfp):
+        """
+        checker is a ContentChecker
+        """
+        checker.report(
+            self.debug,
+            "Validating %%s checksum for %s" % filename)
+        if not checker.is_valid():
+            tfp.close()
+            os.unlink(filename)
+            raise DistutilsError(
+                "%s validation failed for %s; "
+                "possible download problem?"
+                % (checker.hash.name, os.path.basename(filename))
+            )
+
+    def add_find_links(self, urls):
+        """Add `urls` to the list that will be prescanned for searches"""
+        for url in urls:
+            if (
+                self.to_scan is None  # if we have already "gone online"
+                or not URL_SCHEME(url)  # or it's a local file/directory
+                or url.startswith('file:')
+                or list(distros_for_url(url))  # or a direct package link
+            ):
+                # then go ahead and process it now
+                self.scan_url(url)
+            else:
+                # otherwise, defer retrieval till later
+                self.to_scan.append(url)
+
+    def prescan(self):
+        """Scan urls scheduled for prescanning (e.g. --find-links)"""
+        if self.to_scan:
+            list(map(self.scan_url, self.to_scan))
+        self.to_scan = None  # from now on, go ahead and process immediately
+
+    def not_found_in_index(self, requirement):
+        if self[requirement.key]:  # we've seen at least one distro
+            meth, msg = self.info, "Couldn't retrieve index page for %r"
+        else:  # no distros seen for this name, might be misspelled
+            meth, msg = (
+                self.warn,
+                "Couldn't find index page for %r (maybe misspelled?)")
+        meth(msg, requirement.unsafe_name)
+        self.scan_all()
+
+    def download(self, spec, tmpdir):
+        """Locate and/or download `spec` to `tmpdir`, returning a local path
+
+        `spec` may be a ``Requirement`` object, or a string containing a URL,
+        an existing local filename, or a project/version requirement spec
+        (i.e. the string form of a ``Requirement`` object).  If it is the URL
+        of a .py file with an unambiguous ``#egg=name-version`` tag (i.e., one
+        that escapes ``-`` as ``_`` throughout), a trivial ``setup.py`` is
+        automatically created alongside the downloaded file.
+
+        If `spec` is a ``Requirement`` object or a string containing a
+        project/version requirement spec, this method returns the location of
+        a matching distribution (possibly after downloading it to `tmpdir`).
+        If `spec` is a locally existing file or directory name, it is simply
+        returned unchanged.  If `spec` is a URL, it is downloaded to a subpath
+        of `tmpdir`, and the local filename is returned.  Various errors may be
+        raised if a problem occurs during downloading.
+        """
+        if not isinstance(spec, Requirement):
+            scheme = URL_SCHEME(spec)
+            if scheme:
+                # It's a url, download it to tmpdir
+                found = self._download_url(scheme.group(1), spec, tmpdir)
+                base, fragment = egg_info_for_url(spec)
+                if base.endswith('.py'):
+                    found = self.gen_setup(found, fragment, tmpdir)
+                return found
+            elif os.path.exists(spec):
+                # Existing file or directory, just return it
+                return spec
+            else:
+                spec = parse_requirement_arg(spec)
+        return getattr(self.fetch_distribution(spec, tmpdir), 'location', None)
+
+    def fetch_distribution(
+            self, requirement, tmpdir, force_scan=False, source=False,
+            develop_ok=False, local_index=None):
+        """Obtain a distribution suitable for fulfilling `requirement`
+
+        `requirement` must be a ``pkg_resources.Requirement`` instance.
+        If necessary, or if the `force_scan` flag is set, the requirement is
+        searched for in the (online) package index as well as the locally
+        installed packages.  If a distribution matching `requirement` is found,
+        the returned distribution's ``location`` is the value you would have
+        gotten from calling the ``download()`` method with the matching
+        distribution's URL or filename.  If no matching distribution is found,
+        ``None`` is returned.
+
+        If the `source` flag is set, only source distributions and source
+        checkout links will be considered.  Unless the `develop_ok` flag is
+        set, development and system eggs (i.e., those using the ``.egg-info``
+        format) will be ignored.
+        """
+        # process a Requirement
+        self.info("Searching for %s", requirement)
+        skipped = {}
+        dist = None
+
+        def find(req, env=None):
+            if env is None:
+                env = self
+            # Find a matching distribution; may be called more than once
+
+            for dist in env[req.key]:
+
+                if dist.precedence == DEVELOP_DIST and not develop_ok:
+                    if dist not in skipped:
+                        self.warn(
+                            "Skipping development or system egg: %s", dist,
+                        )
+                        skipped[dist] = 1
+                    continue
+
+                test = (
+                    dist in req
+                    and (dist.precedence <= SOURCE_DIST or not source)
+                )
+                if test:
+                    loc = self.download(dist.location, tmpdir)
+                    dist.download_location = loc
+                    if os.path.exists(dist.download_location):
+                        return dist
+
+        if force_scan:
+            self.prescan()
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if not dist and local_index is not None:
+            dist = find(requirement, local_index)
+
+        if dist is None:
+            if self.to_scan is not None:
+                self.prescan()
+            dist = find(requirement)
+
+        if dist is None and not force_scan:
+            self.find_packages(requirement)
+            dist = find(requirement)
+
+        if dist is None:
+            self.warn(
+                "No local packages or working download links found for %s%s",
+                (source and "a source distribution of " or ""),
+                requirement,
+            )
+        else:
+            self.info("Best match: %s", dist)
+            return dist.clone(location=dist.download_location)
+
+    def fetch(self, requirement, tmpdir, force_scan=False, source=False):
+        """Obtain a file suitable for fulfilling `requirement`
+
+        DEPRECATED; use the ``fetch_distribution()`` method now instead.  For
+        backward compatibility, this routine is identical but returns the
+        ``location`` of the downloaded distribution instead of a distribution
+        object.
+        """
+        dist = self.fetch_distribution(requirement, tmpdir, force_scan, source)
+        if dist is not None:
+            return dist.location
+        return None
+
+    def gen_setup(self, filename, fragment, tmpdir):
+        match = EGG_FRAGMENT.match(fragment)
+        dists = match and [
+            d for d in
+            interpret_distro_name(filename, match.group(1), None) if d.version
+        ] or []
+
+        if len(dists) == 1:  # unambiguous ``#egg`` fragment
+            basename = os.path.basename(filename)
+
+            # Make sure the file has been downloaded to the temp dir.
+            if os.path.dirname(filename) != tmpdir:
+                dst = os.path.join(tmpdir, basename)
+                from setuptools.command.easy_install import samefile
+                if not samefile(filename, dst):
+                    shutil.copy2(filename, dst)
+                    filename = dst
+
+            with open(os.path.join(tmpdir, 'setup.py'), 'w') as file:
+                file.write(
+                    "from setuptools import setup\n"
+                    "setup(name=%r, version=%r, py_modules=[%r])\n"
+                    % (
+                        dists[0].project_name, dists[0].version,
+                        os.path.splitext(basename)[0]
+                    )
+                )
+            return filename
+
+        elif match:
+            raise DistutilsError(
+                "Can't unambiguously interpret project/version identifier %r; "
+                "any dashes in the name or version should be escaped using "
+                "underscores. %r" % (fragment, dists)
+            )
+        else:
+            raise DistutilsError(
+                "Can't process plain .py files without an '#egg=name-version'"
+                " suffix to enable automatic setup script generation."
+            )
+
+    dl_blocksize = 8192
+
+    def _download_to(self, url, filename):
+        self.info("Downloading %s", url)
+        # Download the file
+        fp = None
+        try:
+            checker = HashChecker.from_url(url)
+            fp = self.open_url(url)
+            if isinstance(fp, urllib.error.HTTPError):
+                raise DistutilsError(
+                    "Can't download %s: %s %s" % (url, fp.code, fp.msg)
+                )
+            headers = fp.info()
+            blocknum = 0
+            bs = self.dl_blocksize
+            size = -1
+            if "content-length" in headers:
+                # Some servers return multiple Content-Length headers :(
+                sizes = get_all_headers(headers, 'Content-Length')
+                size = max(map(int, sizes))
+                self.reporthook(url, filename, blocknum, bs, size)
+            with open(filename, 'wb') as tfp:
+                while True:
+                    block = fp.read(bs)
+                    if block:
+                        checker.feed(block)
+                        tfp.write(block)
+                        blocknum += 1
+                        self.reporthook(url, filename, blocknum, bs, size)
+                    else:
+                        break
+                self.check_hash(checker, filename, tfp)
+            return headers
+        finally:
+            if fp:
+                fp.close()
+
+    def reporthook(self, url, filename, blocknum, blksize, size):
+        pass  # no-op
+
+    def open_url(self, url, warning=None):
+        if url.startswith('file:'):
+            return local_open(url)
+        try:
+            return open_with_auth(url, self.opener)
+        except (ValueError, http_client.InvalidURL) as v:
+            msg = ' '.join([str(arg) for arg in v.args])
+            if warning:
+                self.warn(warning, msg)
+            else:
+                raise DistutilsError('%s %s' % (url, msg))
+        except urllib.error.HTTPError as v:
+            return v
+        except urllib.error.URLError as v:
+            if warning:
+                self.warn(warning, v.reason)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v.reason))
+        except http_client.BadStatusLine as v:
+            if warning:
+                self.warn(warning, v.line)
+            else:
+                raise DistutilsError(
+                    '%s returned a bad status line. The server might be '
+                    'down, %s' %
+                    (url, v.line)
+                )
+        except (http_client.HTTPException, socket.error) as v:
+            if warning:
+                self.warn(warning, v)
+            else:
+                raise DistutilsError("Download error for %s: %s"
+                                     % (url, v))
+
+    def _download_url(self, scheme, url, tmpdir):
+        # Determine download filename
+        #
+        name, fragment = egg_info_for_url(url)
+        if name:
+            while '..' in name:
+                name = name.replace('..', '.').replace('\\', '_')
+        else:
+            name = "__downloaded__"  # default if URL has no path contents
+
+        if name.endswith('.egg.zip'):
+            name = name[:-4]  # strip the extra .zip before download
+
+        filename = os.path.join(tmpdir, name)
+
+        # Download the file
+        #
+        if scheme == 'svn' or scheme.startswith('svn+'):
+            return self._download_svn(url, filename)
+        elif scheme == 'git' or scheme.startswith('git+'):
+            return self._download_git(url, filename)
+        elif scheme.startswith('hg+'):
+            return self._download_hg(url, filename)
+        elif scheme == 'file':
+            return urllib.request.url2pathname(urllib.parse.urlparse(url)[2])
+        else:
+            self.url_ok(url, True)  # raises error if not allowed
+            return self._attempt_download(url, filename)
+
+    def scan_url(self, url):
+        self.process_url(url, True)
+
+    def _attempt_download(self, url, filename):
+        headers = self._download_to(url, filename)
+        if 'html' in headers.get('content-type', '').lower():
+            return self._download_html(url, headers, filename)
+        else:
+            return filename
+
+    def _download_html(self, url, headers, filename):
+        file = open(filename)
+        for line in file:
+            if line.strip():
+                # Check for a subversion index page
+                if re.search(r'<title>([^- ]+ - )?Revision \d+:', line):
+                    # it's a subversion index page:
+                    file.close()
+                    os.unlink(filename)
+                    return self._download_svn(url, filename)
+                break  # not an index page
+        file.close()
+        os.unlink(filename)
+        raise DistutilsError("Unexpected HTML page found at " + url)
+
+    def _download_svn(self, url, filename):
+        warnings.warn("SVN download support is deprecated", UserWarning)
+        url = url.split('#', 1)[0]  # remove any fragment for svn's sake
+        creds = ''
+        if url.lower().startswith('svn:') and '@' in url:
+            scheme, netloc, path, p, q, f = urllib.parse.urlparse(url)
+            if not netloc and path.startswith('//') and '/' in path[2:]:
+                netloc, path = path[2:].split('/', 1)
+                auth, host = _splituser(netloc)
+                if auth:
+                    if ':' in auth:
+                        user, pw = auth.split(':', 1)
+                        creds = " --username=%s --password=%s" % (user, pw)
+                    else:
+                        creds = " --username=" + auth
+                    netloc = host
+                    parts = scheme, netloc, url, p, q, f
+                    url = urllib.parse.urlunparse(parts)
+        self.info("Doing subversion checkout from %s to %s", url, filename)
+        os.system("svn checkout%s -q %s %s" % (creds, url, filename))
+        return filename
+
+    @staticmethod
+    def _vcs_split_rev_from_url(url, pop_prefix=False):
+        scheme, netloc, path, query, frag = urllib.parse.urlsplit(url)
+
+        scheme = scheme.split('+', 1)[-1]
+
+        # Some fragment identification fails
+        path = path.split('#', 1)[0]
+
+        rev = None
+        if '@' in path:
+            path, rev = path.rsplit('@', 1)
+
+        # Also, discard fragment
+        url = urllib.parse.urlunsplit((scheme, netloc, path, query, ''))
+
+        return url, rev
+
+    def _download_git(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing git clone from %s to %s", url, filename)
+        os.system("git clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Checking out %s", rev)
+            os.system("git -C %s checkout --quiet %s" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def _download_hg(self, url, filename):
+        filename = filename.split('#', 1)[0]
+        url, rev = self._vcs_split_rev_from_url(url, pop_prefix=True)
+
+        self.info("Doing hg clone from %s to %s", url, filename)
+        os.system("hg clone --quiet %s %s" % (url, filename))
+
+        if rev is not None:
+            self.info("Updating to %s", rev)
+            os.system("hg --cwd %s up -C -r %s -q" % (
+                filename,
+                rev,
+            ))
+
+        return filename
+
+    def debug(self, msg, *args):
+        log.debug(msg, *args)
+
+    def info(self, msg, *args):
+        log.info(msg, *args)
+
+    def warn(self, msg, *args):
+        log.warn(msg, *args)
+
+
+# This pattern matches a character entity reference (a decimal numeric
+# references, a hexadecimal numeric reference, or a named reference).
+entity_sub = re.compile(r'&(#(\d+|x[\da-fA-F]+)|[\w.:-]+);?').sub
+
+
+def decode_entity(match):
+    what = match.group(0)
+    return unescape(what)
+
+
+def htmldecode(text):
+    """
+    Decode HTML entities in the given text.
+
+    >>> htmldecode(
+    ...     'https://../package_name-0.1.2.tar.gz'
+    ...     '?tokena=A&amp;tokenb=B">package_name-0.1.2.tar.gz')
+    'https://../package_name-0.1.2.tar.gz?tokena=A&tokenb=B">package_name-0.1.2.tar.gz'
+    """
+    return entity_sub(decode_entity, text)
+
+
+def socket_timeout(timeout=15):
+    def _socket_timeout(func):
+        def _socket_timeout(*args, **kwargs):
+            old_timeout = socket.getdefaulttimeout()
+            socket.setdefaulttimeout(timeout)
+            try:
+                return func(*args, **kwargs)
+            finally:
+                socket.setdefaulttimeout(old_timeout)
+
+        return _socket_timeout
+
+    return _socket_timeout
+
+
+def _encode_auth(auth):
+    """
+    A function compatible with Python 2.3-3.3 that will encode
+    auth from a URL suitable for an HTTP header.
+    >>> str(_encode_auth('username%3Apassword'))
+    'dXNlcm5hbWU6cGFzc3dvcmQ='
+
+    Long auth strings should not cause a newline to be inserted.
+    >>> long_auth = 'username:' + 'password'*10
+    >>> chr(10) in str(_encode_auth(long_auth))
+    False
+    """
+    auth_s = urllib.parse.unquote(auth)
+    # convert to bytes
+    auth_bytes = auth_s.encode()
+    encoded_bytes = base64.b64encode(auth_bytes)
+    # convert back to a string
+    encoded = encoded_bytes.decode()
+    # strip the trailing carriage return
+    return encoded.replace('\n', '')
+
+
+class Credential:
+    """
+    A username/password pair. Use like a namedtuple.
+    """
+
+    def __init__(self, username, password):
+        self.username = username
+        self.password = password
+
+    def __iter__(self):
+        yield self.username
+        yield self.password
+
+    def __str__(self):
+        return '%(username)s:%(password)s' % vars(self)
+
+
+class PyPIConfig(configparser.RawConfigParser):
+    def __init__(self):
+        """
+        Load from ~/.pypirc
+        """
+        defaults = dict.fromkeys(['username', 'password', 'repository'], '')
+        configparser.RawConfigParser.__init__(self, defaults)
+
+        rc = os.path.join(os.path.expanduser('~'), '.pypirc')
+        if os.path.exists(rc):
+            self.read(rc)
+
+    @property
+    def creds_by_repository(self):
+        sections_with_repositories = [
+            section for section in self.sections()
+            if self.get(section, 'repository').strip()
+        ]
+
+        return dict(map(self._get_repo_cred, sections_with_repositories))
+
+    def _get_repo_cred(self, section):
+        repo = self.get(section, 'repository').strip()
+        return repo, Credential(
+            self.get(section, 'username').strip(),
+            self.get(section, 'password').strip(),
+        )
+
+    def find_credential(self, url):
+        """
+        If the URL indicated appears to be a repository defined in this
+        config, return the credential for that repository.
+        """
+        for repository, cred in self.creds_by_repository.items():
+            if url.startswith(repository):
+                return cred
+
+
+def open_with_auth(url, opener=urllib.request.urlopen):
+    """Open a urllib2 request, handling HTTP authentication"""
+
+    parsed = urllib.parse.urlparse(url)
+    scheme, netloc, path, params, query, frag = parsed
+
+    # Double scheme does not raise on Mac OS X as revealed by a
+    # failing test. We would expect "nonnumeric port". Refs #20.
+    if netloc.endswith(':'):
+        raise http_client.InvalidURL("nonnumeric port: ''")
+
+    if scheme in ('http', 'https'):
+        auth, address = _splituser(netloc)
+    else:
+        auth = None
+
+    if not auth:
+        cred = PyPIConfig().find_credential(url)
+        if cred:
+            auth = str(cred)
+            info = cred.username, url
+            log.info('Authenticating as %s for %s (from .pypirc)', *info)
+
+    if auth:
+        auth = "Basic " + _encode_auth(auth)
+        parts = scheme, address, path, params, query, frag
+        new_url = urllib.parse.urlunparse(parts)
+        request = urllib.request.Request(new_url)
+        request.add_header("Authorization", auth)
+    else:
+        request = urllib.request.Request(url)
+
+    request.add_header('User-Agent', user_agent)
+    fp = opener(request)
+
+    if auth:
+        # Put authentication info back into request URL if same host,
+        # so that links found on the page will work
+        s2, h2, path2, param2, query2, frag2 = urllib.parse.urlparse(fp.url)
+        if s2 == scheme and h2 == address:
+            parts = s2, netloc, path2, param2, query2, frag2
+            fp.url = urllib.parse.urlunparse(parts)
+
+    return fp
+
+
+# copy of urllib.parse._splituser from Python 3.8
+def _splituser(host):
+    """splituser('user[:passwd]@host[:port]') --> 'user[:passwd]', 'host[:port]'."""
+    user, delim, host = host.rpartition('@')
+    return (user if delim else None), host
+
+
+# adding a timeout to avoid freezing package_index
+open_with_auth = socket_timeout(_SOCKET_TIMEOUT)(open_with_auth)
+
+
+def fix_sf_url(url):
+    return url  # backward compatibility
+
+
+def local_open(url):
+    """Read a local path, with special support for directories"""
+    scheme, server, path, param, query, frag = urllib.parse.urlparse(url)
+    filename = urllib.request.url2pathname(path)
+    if os.path.isfile(filename):
+        return urllib.request.urlopen(url)
+    elif path.endswith('/') and os.path.isdir(filename):
+        files = []
+        for f in os.listdir(filename):
+            filepath = os.path.join(filename, f)
+            if f == 'index.html':
+                with open(filepath, 'r') as fp:
+                    body = fp.read()
+                break
+            elif os.path.isdir(filepath):
+                f += '/'
+            files.append('<a href="{name}">{name}</a>'.format(name=f))
+        else:
+            tmpl = (
+                "<html><head><title>{url}</title>"
+                "</head><body>{files}</body></html>")
+            body = tmpl.format(url=url, files='\n'.join(files))
+        status, message = 200, "OK"
+    else:
+        status, message, body = 404, "Path not found", "Not found"
+
+    headers = {'content-type': 'text/html'}
+    body_stream = six.StringIO(body)
+    return urllib.error.HTTPError(url, status, message, headers, body_stream)
diff --git a/venv/lib/python3.9/site-packages/setuptools/py27compat.py b/venv/lib/python3.9/site-packages/setuptools/py27compat.py
new file mode 100644
index 0000000..1d57360
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/py27compat.py
@@ -0,0 +1,60 @@
+"""
+Compatibility Support for Python 2.7 and earlier
+"""
+
+import sys
+import platform
+
+from setuptools.extern import six
+
+
+def get_all_headers(message, key):
+    """
+    Given an HTTPMessage, return all headers matching a given key.
+    """
+    return message.get_all(key)
+
+
+if six.PY2:
+    def get_all_headers(message, key):
+        return message.getheaders(key)
+
+
+linux_py2_ascii = (
+    platform.system() == 'Linux' and
+    six.PY2
+)
+
+rmtree_safe = str if linux_py2_ascii else lambda x: x
+"""Workaround for http://bugs.python.org/issue24672"""
+
+
+try:
+    from ._imp import find_module, PY_COMPILED, PY_FROZEN, PY_SOURCE
+    from ._imp import get_frozen_object, get_module
+except ImportError:
+    import imp
+    from imp import PY_COMPILED, PY_FROZEN, PY_SOURCE  # noqa
+
+    def find_module(module, paths=None):
+        """Just like 'imp.find_module()', but with package support"""
+        parts = module.split('.')
+        while parts:
+            part = parts.pop(0)
+            f, path, (suffix, mode, kind) = info = imp.find_module(part, paths)
+
+            if kind == imp.PKG_DIRECTORY:
+                parts = parts or ['__init__']
+                paths = [path]
+
+            elif parts:
+                raise ImportError("Can't find %r in %s" % (parts, module))
+
+        return info
+
+    def get_frozen_object(module, paths):
+        return imp.get_frozen_object(module)
+
+    def get_module(module, paths, info):
+        imp.load_module(module, *info)
+        return sys.modules[module]
diff --git a/venv/lib/python3.9/site-packages/setuptools/py31compat.py b/venv/lib/python3.9/site-packages/setuptools/py31compat.py
new file mode 100644
index 0000000..e1da7ee
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/py31compat.py
@@ -0,0 +1,32 @@
+__all__ = []
+
+__metaclass__ = type
+
+
+try:
+    # Python >=3.2
+    from tempfile import TemporaryDirectory
+except ImportError:
+    import shutil
+    import tempfile
+
+    class TemporaryDirectory:
+        """
+        Very simple temporary directory context manager.
+        Will try to delete afterward, but will also ignore OS and similar
+        errors on deletion.
+        """
+
+        def __init__(self, **kwargs):
+            self.name = None  # Handle mkdtemp raising an exception
+            self.name = tempfile.mkdtemp(**kwargs)
+
+        def __enter__(self):
+            return self.name
+
+        def __exit__(self, exctype, excvalue, exctrace):
+            try:
+                shutil.rmtree(self.name, True)
+            except OSError:  # removal errors are not the only possible
+                pass
+            self.name = None
diff --git a/venv/lib/python3.9/site-packages/setuptools/py33compat.py b/venv/lib/python3.9/site-packages/setuptools/py33compat.py
new file mode 100644
index 0000000..cb69443
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/py33compat.py
@@ -0,0 +1,59 @@
+import dis
+import array
+import collections
+
+try:
+    import html
+except ImportError:
+    html = None
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import html_parser
+
+__metaclass__ = type
+
+OpArg = collections.namedtuple('OpArg', 'opcode arg')
+
+
+class Bytecode_compat:
+    def __init__(self, code):
+        self.code = code
+
+    def __iter__(self):
+        """Yield '(op,arg)' pair for each operation in code object 'code'"""
+
+        bytes = array.array('b', self.code.co_code)
+        eof = len(self.code.co_code)
+
+        ptr = 0
+        extended_arg = 0
+
+        while ptr < eof:
+
+            op = bytes[ptr]
+
+            if op >= dis.HAVE_ARGUMENT:
+
+                arg = bytes[ptr + 1] + bytes[ptr + 2] * 256 + extended_arg
+                ptr += 3
+
+                if op == dis.EXTENDED_ARG:
+                    long_type = six.integer_types[-1]
+                    extended_arg = arg * long_type(65536)
+                    continue
+
+            else:
+                arg = None
+                ptr += 1
+
+            yield OpArg(op, arg)
+
+
+Bytecode = getattr(dis, 'Bytecode', Bytecode_compat)
+
+
+unescape = getattr(html, 'unescape', None)
+if unescape is None:
+    # HTMLParser.unescape is deprecated since Python 3.4, and will be removed
+    # from 3.9.
+    unescape = html_parser.HTMLParser().unescape
diff --git a/venv/lib/python3.9/site-packages/setuptools/py34compat.py b/venv/lib/python3.9/site-packages/setuptools/py34compat.py
new file mode 100644
index 0000000..3ad9172
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/py34compat.py
@@ -0,0 +1,13 @@
+import importlib
+
+try:
+    import importlib.util
+except ImportError:
+    pass
+
+
+try:
+    module_from_spec = importlib.util.module_from_spec
+except AttributeError:
+    def module_from_spec(spec):
+        return spec.loader.load_module(spec.name)
diff --git a/venv/lib/python3.9/site-packages/setuptools/sandbox.py b/venv/lib/python3.9/site-packages/setuptools/sandbox.py
new file mode 100644
index 0000000..685f3f7
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/sandbox.py
@@ -0,0 +1,491 @@
+import os
+import sys
+import tempfile
+import operator
+import functools
+import itertools
+import re
+import contextlib
+import pickle
+import textwrap
+
+from setuptools.extern import six
+from setuptools.extern.six.moves import builtins, map
+
+import pkg_resources.py31compat
+
+if sys.platform.startswith('java'):
+    import org.python.modules.posix.PosixModule as _os
+else:
+    _os = sys.modules[os.name]
+try:
+    _file = file
+except NameError:
+    _file = None
+_open = open
+from distutils.errors import DistutilsError
+from pkg_resources import working_set
+
+
+__all__ = [
+    "AbstractSandbox", "DirectorySandbox", "SandboxViolation", "run_setup",
+]
+
+
+def _execfile(filename, globals, locals=None):
+    """
+    Python 3 implementation of execfile.
+    """
+    mode = 'rb'
+    with open(filename, mode) as stream:
+        script = stream.read()
+    if locals is None:
+        locals = globals
+    code = compile(script, filename, 'exec')
+    exec(code, globals, locals)
+
+
+@contextlib.contextmanager
+def save_argv(repl=None):
+    saved = sys.argv[:]
+    if repl is not None:
+        sys.argv[:] = repl
+    try:
+        yield saved
+    finally:
+        sys.argv[:] = saved
+
+
+@contextlib.contextmanager
+def save_path():
+    saved = sys.path[:]
+    try:
+        yield saved
+    finally:
+        sys.path[:] = saved
+
+
+@contextlib.contextmanager
+def override_temp(replacement):
+    """
+    Monkey-patch tempfile.tempdir with replacement, ensuring it exists
+    """
+    pkg_resources.py31compat.makedirs(replacement, exist_ok=True)
+
+    saved = tempfile.tempdir
+
+    tempfile.tempdir = replacement
+
+    try:
+        yield
+    finally:
+        tempfile.tempdir = saved
+
+
+@contextlib.contextmanager
+def pushd(target):
+    saved = os.getcwd()
+    os.chdir(target)
+    try:
+        yield saved
+    finally:
+        os.chdir(saved)
+
+
+class UnpickleableException(Exception):
+    """
+    An exception representing another Exception that could not be pickled.
+    """
+
+    @staticmethod
+    def dump(type, exc):
+        """
+        Always return a dumped (pickled) type and exc. If exc can't be pickled,
+        wrap it in UnpickleableException first.
+        """
+        try:
+            return pickle.dumps(type), pickle.dumps(exc)
+        except Exception:
+            # get UnpickleableException inside the sandbox
+            from setuptools.sandbox import UnpickleableException as cls
+            return cls.dump(cls, cls(repr(exc)))
+
+
+class ExceptionSaver:
+    """
+    A Context Manager that will save an exception, serialized, and restore it
+    later.
+    """
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, type, exc, tb):
+        if not exc:
+            return
+
+        # dump the exception
+        self._saved = UnpickleableException.dump(type, exc)
+        self._tb = tb
+
+        # suppress the exception
+        return True
+
+    def resume(self):
+        "restore and re-raise any exception"
+
+        if '_saved' not in vars(self):
+            return
+
+        type, exc = map(pickle.loads, self._saved)
+        six.reraise(type, exc, self._tb)
+
+
+@contextlib.contextmanager
+def save_modules():
+    """
+    Context in which imported modules are saved.
+
+    Translates exceptions internal to the context into the equivalent exception
+    outside the context.
+    """
+    saved = sys.modules.copy()
+    with ExceptionSaver() as saved_exc:
+        yield saved
+
+    sys.modules.update(saved)
+    # remove any modules imported since
+    del_modules = (
+        mod_name for mod_name in sys.modules
+        if mod_name not in saved
+        # exclude any encodings modules. See #285
+        and not mod_name.startswith('encodings.')
+    )
+    _clear_modules(del_modules)
+
+    saved_exc.resume()
+
+
+def _clear_modules(module_names):
+    for mod_name in list(module_names):
+        del sys.modules[mod_name]
+
+
+@contextlib.contextmanager
+def save_pkg_resources_state():
+    saved = pkg_resources.__getstate__()
+    try:
+        yield saved
+    finally:
+        pkg_resources.__setstate__(saved)
+
+
+@contextlib.contextmanager
+def setup_context(setup_dir):
+    temp_dir = os.path.join(setup_dir, 'temp')
+    with save_pkg_resources_state():
+        with save_modules():
+            hide_setuptools()
+            with save_path():
+                with save_argv():
+                    with override_temp(temp_dir):
+                        with pushd(setup_dir):
+                            # ensure setuptools commands are available
+                            __import__('setuptools')
+                            yield
+
+
+def _needs_hiding(mod_name):
+    """
+    >>> _needs_hiding('setuptools')
+    True
+    >>> _needs_hiding('pkg_resources')
+    True
+    >>> _needs_hiding('setuptools_plugin')
+    False
+    >>> _needs_hiding('setuptools.__init__')
+    True
+    >>> _needs_hiding('distutils')
+    True
+    >>> _needs_hiding('os')
+    False
+    >>> _needs_hiding('Cython')
+    True
+    """
+    pattern = re.compile(r'(setuptools|pkg_resources|distutils|Cython)(\.|$)')
+    return bool(pattern.match(mod_name))
+
+
+def hide_setuptools():
+    """
+    Remove references to setuptools' modules from sys.modules to allow the
+    invocation to import the most appropriate setuptools. This technique is
+    necessary to avoid issues such as #315 where setuptools upgrading itself
+    would fail to find a function declared in the metadata.
+    """
+    modules = filter(_needs_hiding, sys.modules)
+    _clear_modules(modules)
+
+
+def run_setup(setup_script, args):
+    """Run a distutils setup script, sandboxed in its directory"""
+    setup_dir = os.path.abspath(os.path.dirname(setup_script))
+    with setup_context(setup_dir):
+        try:
+            sys.argv[:] = [setup_script] + list(args)
+            sys.path.insert(0, setup_dir)
+            # reset to include setup dir, w/clean callback list
+            working_set.__init__()
+            working_set.callbacks.append(lambda dist: dist.activate())
+
+            # __file__ should be a byte string on Python 2 (#712)
+            dunder_file = (
+                setup_script
+                if isinstance(setup_script, str) else
+                setup_script.encode(sys.getfilesystemencoding())
+            )
+
+            with DirectorySandbox(setup_dir):
+                ns = dict(__file__=dunder_file, __name__='__main__')
+                _execfile(setup_script, ns)
+        except SystemExit as v:
+            if v.args and v.args[0]:
+                raise
+            # Normal exit, just return
+
+
+class AbstractSandbox:
+    """Wrap 'os' module and 'open()' builtin for virtualizing setup scripts"""
+
+    _active = False
+
+    def __init__(self):
+        self._attrs = [
+            name for name in dir(_os)
+            if not name.startswith('_') and hasattr(self, name)
+        ]
+
+    def _copy(self, source):
+        for name in self._attrs:
+            setattr(os, name, getattr(source, name))
+
+    def __enter__(self):
+        self._copy(self)
+        if _file:
+            builtins.file = self._file
+        builtins.open = self._open
+        self._active = True
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        self._active = False
+        if _file:
+            builtins.file = _file
+        builtins.open = _open
+        self._copy(_os)
+
+    def run(self, func):
+        """Run 'func' under os sandboxing"""
+        with self:
+            return func()
+
+    def _mk_dual_path_wrapper(name):
+        original = getattr(_os, name)
+
+        def wrap(self, src, dst, *args, **kw):
+            if self._active:
+                src, dst = self._remap_pair(name, src, dst, *args, **kw)
+            return original(src, dst, *args, **kw)
+
+        return wrap
+
+    for name in ["rename", "link", "symlink"]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_dual_path_wrapper(name)
+
+    def _mk_single_path_wrapper(name, original=None):
+        original = original or getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+            return original(path, *args, **kw)
+
+        return wrap
+
+    if _file:
+        _file = _mk_single_path_wrapper('file', _file)
+    _open = _mk_single_path_wrapper('open', _open)
+    for name in [
+        "stat", "listdir", "chdir", "open", "chmod", "chown", "mkdir",
+        "remove", "unlink", "rmdir", "utime", "lchown", "chroot", "lstat",
+        "startfile", "mkfifo", "mknod", "pathconf", "access"
+    ]:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_path_wrapper(name)
+
+    def _mk_single_with_return(name):
+        original = getattr(_os, name)
+
+        def wrap(self, path, *args, **kw):
+            if self._active:
+                path = self._remap_input(name, path, *args, **kw)
+                return self._remap_output(name, original(path, *args, **kw))
+            return original(path, *args, **kw)
+
+        return wrap
+
+    for name in ['readlink', 'tempnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_single_with_return(name)
+
+    def _mk_query(name):
+        original = getattr(_os, name)
+
+        def wrap(self, *args, **kw):
+            retval = original(*args, **kw)
+            if self._active:
+                return self._remap_output(name, retval)
+            return retval
+
+        return wrap
+
+    for name in ['getcwd', 'tmpnam']:
+        if hasattr(_os, name):
+            locals()[name] = _mk_query(name)
+
+    def _validate_path(self, path):
+        """Called to remap or validate any path, whether input or output"""
+        return path
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        return self._validate_path(path)
+
+    def _remap_output(self, operation, path):
+        """Called for path outputs"""
+        return self._validate_path(path)
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        return (
+            self._remap_input(operation + '-from', src, *args, **kw),
+            self._remap_input(operation + '-to', dst, *args, **kw)
+        )
+
+
+if hasattr(os, 'devnull'):
+    _EXCEPTIONS = [os.devnull,]
+else:
+    _EXCEPTIONS = []
+
+
+class DirectorySandbox(AbstractSandbox):
+    """Restrict operations to a single subdirectory - pseudo-chroot"""
+
+    write_ops = dict.fromkeys([
+        "open", "chmod", "chown", "mkdir", "remove", "unlink", "rmdir",
+        "utime", "lchown", "chroot", "mkfifo", "mknod", "tempnam",
+    ])
+
+    _exception_patterns = [
+        # Allow lib2to3 to attempt to save a pickled grammar object (#121)
+        r'.*lib2to3.*\.pickle$',
+    ]
+    "exempt writing to paths that match the pattern"
+
+    def __init__(self, sandbox, exceptions=_EXCEPTIONS):
+        self._sandbox = os.path.normcase(os.path.realpath(sandbox))
+        self._prefix = os.path.join(self._sandbox, '')
+        self._exceptions = [
+            os.path.normcase(os.path.realpath(path))
+            for path in exceptions
+        ]
+        AbstractSandbox.__init__(self)
+
+    def _violation(self, operation, *args, **kw):
+        from setuptools.sandbox import SandboxViolation
+        raise SandboxViolation(operation, args, kw)
+
+    if _file:
+
+        def _file(self, path, mode='r', *args, **kw):
+            if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+                self._violation("file", path, mode, *args, **kw)
+            return _file(path, mode, *args, **kw)
+
+    def _open(self, path, mode='r', *args, **kw):
+        if mode not in ('r', 'rt', 'rb', 'rU', 'U') and not self._ok(path):
+            self._violation("open", path, mode, *args, **kw)
+        return _open(path, mode, *args, **kw)
+
+    def tmpnam(self):
+        self._violation("tmpnam")
+
+    def _ok(self, path):
+        active = self._active
+        try:
+            self._active = False
+            realpath = os.path.normcase(os.path.realpath(path))
+            return (
+                self._exempted(realpath)
+                or realpath == self._sandbox
+                or realpath.startswith(self._prefix)
+            )
+        finally:
+            self._active = active
+
+    def _exempted(self, filepath):
+        start_matches = (
+            filepath.startswith(exception)
+            for exception in self._exceptions
+        )
+        pattern_matches = (
+            re.match(pattern, filepath)
+            for pattern in self._exception_patterns
+        )
+        candidates = itertools.chain(start_matches, pattern_matches)
+        return any(candidates)
+
+    def _remap_input(self, operation, path, *args, **kw):
+        """Called for path inputs"""
+        if operation in self.write_ops and not self._ok(path):
+            self._violation(operation, os.path.realpath(path), *args, **kw)
+        return path
+
+    def _remap_pair(self, operation, src, dst, *args, **kw):
+        """Called for path pairs like rename, link, and symlink operations"""
+        if not self._ok(src) or not self._ok(dst):
+            self._violation(operation, src, dst, *args, **kw)
+        return (src, dst)
+
+    def open(self, file, flags, mode=0o777, *args, **kw):
+        """Called for low-level os.open()"""
+        if flags & WRITE_FLAGS and not self._ok(file):
+            self._violation("os.open", file, flags, mode, *args, **kw)
+        return _os.open(file, flags, mode, *args, **kw)
+
+
+WRITE_FLAGS = functools.reduce(
+    operator.or_, [getattr(_os, a, 0) for a in
+        "O_WRONLY O_RDWR O_APPEND O_CREAT O_TRUNC O_TEMPORARY".split()]
+)
+
+
+class SandboxViolation(DistutilsError):
+    """A setup script attempted to modify the filesystem outside the sandbox"""
+
+    tmpl = textwrap.dedent("""
+        SandboxViolation: {cmd}{args!r} {kwargs}
+
+        The package setup script has attempted to modify files on your system
+        that are not within the EasyInstall build area, and has been aborted.
+
+        This package cannot be safely installed by EasyInstall, and may not
+        support alternate installation locations even if you run its setup
+        script by hand.  Please inform the package's author and the EasyInstall
+        maintainers to find out if a fix or workaround is available.
+        """).lstrip()
+
+    def __str__(self):
+        cmd, args, kwargs = self.args
+        return self.tmpl.format(**locals())
diff --git "a/venv/lib/python3.9/site-packages/setuptools/script \050dev\051.tmpl" "b/venv/lib/python3.9/site-packages/setuptools/script \050dev\051.tmpl"
new file mode 100644
index 0000000..39a24b0
--- /dev/null
+++ "b/venv/lib/python3.9/site-packages/setuptools/script \050dev\051.tmpl"
@@ -0,0 +1,6 @@
+# EASY-INSTALL-DEV-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').require(%(spec)r)
+__file__ = %(dev_path)r
+with open(__file__) as f:
+    exec(compile(f.read(), __file__, 'exec'))
diff --git a/venv/lib/python3.9/site-packages/setuptools/script.tmpl b/venv/lib/python3.9/site-packages/setuptools/script.tmpl
new file mode 100644
index 0000000..ff5efbc
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/script.tmpl
@@ -0,0 +1,3 @@
+# EASY-INSTALL-SCRIPT: %(spec)r,%(script_name)r
+__requires__ = %(spec)r
+__import__('pkg_resources').run_script(%(spec)r, %(script_name)r)
diff --git a/venv/lib/python3.9/site-packages/setuptools/site-patch.py b/venv/lib/python3.9/site-packages/setuptools/site-patch.py
new file mode 100644
index 0000000..40b00de
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/site-patch.py
@@ -0,0 +1,74 @@
+def __boot():
+    import sys
+    import os
+    PYTHONPATH = os.environ.get('PYTHONPATH')
+    if PYTHONPATH is None or (sys.platform == 'win32' and not PYTHONPATH):
+        PYTHONPATH = []
+    else:
+        PYTHONPATH = PYTHONPATH.split(os.pathsep)
+
+    pic = getattr(sys, 'path_importer_cache', {})
+    stdpath = sys.path[len(PYTHONPATH):]
+    mydir = os.path.dirname(__file__)
+
+    for item in stdpath:
+        if item == mydir or not item:
+            continue  # skip if current dir. on Windows, or my own directory
+        importer = pic.get(item)
+        if importer is not None:
+            loader = importer.find_module('site')
+            if loader is not None:
+                # This should actually reload the current module
+                loader.load_module('site')
+                break
+        else:
+            try:
+                import imp  # Avoid import loop in Python 3
+                stream, path, descr = imp.find_module('site', [item])
+            except ImportError:
+                continue
+            if stream is None:
+                continue
+            try:
+                # This should actually reload the current module
+                imp.load_module('site', stream, path, descr)
+            finally:
+                stream.close()
+            break
+    else:
+        raise ImportError("Couldn't find the real 'site' module")
+
+    known_paths = dict([(makepath(item)[1], 1) for item in sys.path])  # 2.2 comp
+
+    oldpos = getattr(sys, '__egginsert', 0)  # save old insertion position
+    sys.__egginsert = 0  # and reset the current one
+
+    for item in PYTHONPATH:
+        addsitedir(item)
+
+    sys.__egginsert += oldpos  # restore effective old position
+
+    d, nd = makepath(stdpath[0])
+    insert_at = None
+    new_path = []
+
+    for item in sys.path:
+        p, np = makepath(item)
+
+        if np == nd and insert_at is None:
+            # We've hit the first 'system' path entry, so added entries go here
+            insert_at = len(new_path)
+
+        if np in known_paths or insert_at is None:
+            new_path.append(item)
+        else:
+            # new path after the insert point, back-insert it
+            new_path.insert(insert_at, item)
+            insert_at += 1
+
+    sys.path[:] = new_path
+
+
+if __name__ == 'site':
+    __boot()
+    del __boot
diff --git a/venv/lib/python3.9/site-packages/setuptools/ssl_support.py b/venv/lib/python3.9/site-packages/setuptools/ssl_support.py
new file mode 100644
index 0000000..226db69
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/ssl_support.py
@@ -0,0 +1,260 @@
+import os
+import socket
+import atexit
+import re
+import functools
+
+from setuptools.extern.six.moves import urllib, http_client, map, filter
+
+from pkg_resources import ResolutionError, ExtractionError
+
+try:
+    import ssl
+except ImportError:
+    ssl = None
+
+__all__ = [
+    'VerifyingHTTPSHandler', 'find_ca_bundle', 'is_available', 'cert_paths',
+    'opener_for'
+]
+
+cert_paths = """
+/etc/pki/tls/certs/ca-bundle.crt
+/etc/ssl/certs/ca-certificates.crt
+/usr/share/ssl/certs/ca-bundle.crt
+/usr/local/share/certs/ca-root.crt
+/etc/ssl/cert.pem
+/System/Library/OpenSSL/certs/cert.pem
+/usr/local/share/certs/ca-root-nss.crt
+/etc/ssl/ca-bundle.pem
+""".strip().split()
+
+try:
+    HTTPSHandler = urllib.request.HTTPSHandler
+    HTTPSConnection = http_client.HTTPSConnection
+except AttributeError:
+    HTTPSHandler = HTTPSConnection = object
+
+is_available = ssl is not None and object not in (HTTPSHandler, HTTPSConnection)
+
+
+try:
+    from ssl import CertificateError, match_hostname
+except ImportError:
+    try:
+        from backports.ssl_match_hostname import CertificateError
+        from backports.ssl_match_hostname import match_hostname
+    except ImportError:
+        CertificateError = None
+        match_hostname = None
+
+if not CertificateError:
+
+    class CertificateError(ValueError):
+        pass
+
+
+if not match_hostname:
+
+    def _dnsname_match(dn, hostname, max_wildcards=1):
+        """Matching according to RFC 6125, section 6.4.3
+
+        https://tools.ietf.org/html/rfc6125#section-6.4.3
+        """
+        pats = []
+        if not dn:
+            return False
+
+        # Ported from python3-syntax:
+        # leftmost, *remainder = dn.split(r'.')
+        parts = dn.split(r'.')
+        leftmost = parts[0]
+        remainder = parts[1:]
+
+        wildcards = leftmost.count('*')
+        if wildcards > max_wildcards:
+            # Issue #17980: avoid denials of service by refusing more
+            # than one wildcard per fragment.  A survey of established
+            # policy among SSL implementations showed it to be a
+            # reasonable choice.
+            raise CertificateError(
+                "too many wildcards in certificate DNS name: " + repr(dn))
+
+        # speed up common case w/o wildcards
+        if not wildcards:
+            return dn.lower() == hostname.lower()
+
+        # RFC 6125, section 6.4.3, subitem 1.
+        # The client SHOULD NOT attempt to match a presented identifier in which
+        # the wildcard character comprises a label other than the left-most label.
+        if leftmost == '*':
+            # When '*' is a fragment by itself, it matches a non-empty dotless
+            # fragment.
+            pats.append('[^.]+')
+        elif leftmost.startswith('xn--') or hostname.startswith('xn--'):
+            # RFC 6125, section 6.4.3, subitem 3.
+            # The client SHOULD NOT attempt to match a presented identifier
+            # where the wildcard character is embedded within an A-label or
+            # U-label of an internationalized domain name.
+            pats.append(re.escape(leftmost))
+        else:
+            # Otherwise, '*' matches any dotless string, e.g. www*
+            pats.append(re.escape(leftmost).replace(r'\*', '[^.]*'))
+
+        # add the remaining fragments, ignore any wildcards
+        for frag in remainder:
+            pats.append(re.escape(frag))
+
+        pat = re.compile(r'\A' + r'\.'.join(pats) + r'\Z', re.IGNORECASE)
+        return pat.match(hostname)
+
+    def match_hostname(cert, hostname):
+        """Verify that *cert* (in decoded format as returned by
+        SSLSocket.getpeercert()) matches the *hostname*.  RFC 2818 and RFC 6125
+        rules are followed, but IP addresses are not accepted for *hostname*.
+
+        CertificateError is raised on failure. On success, the function
+        returns nothing.
+        """
+        if not cert:
+            raise ValueError("empty or no certificate")
+        dnsnames = []
+        san = cert.get('subjectAltName', ())
+        for key, value in san:
+            if key == 'DNS':
+                if _dnsname_match(value, hostname):
+                    return
+                dnsnames.append(value)
+        if not dnsnames:
+            # The subject is only checked when there is no dNSName entry
+            # in subjectAltName
+            for sub in cert.get('subject', ()):
+                for key, value in sub:
+                    # XXX according to RFC 2818, the most specific Common Name
+                    # must be used.
+                    if key == 'commonName':
+                        if _dnsname_match(value, hostname):
+                            return
+                        dnsnames.append(value)
+        if len(dnsnames) > 1:
+            raise CertificateError("hostname %r "
+                "doesn't match either of %s"
+                % (hostname, ', '.join(map(repr, dnsnames))))
+        elif len(dnsnames) == 1:
+            raise CertificateError("hostname %r "
+                "doesn't match %r"
+                % (hostname, dnsnames[0]))
+        else:
+            raise CertificateError("no appropriate commonName or "
+                "subjectAltName fields were found")
+
+
+class VerifyingHTTPSHandler(HTTPSHandler):
+    """Simple verifying handler: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, ca_bundle):
+        self.ca_bundle = ca_bundle
+        HTTPSHandler.__init__(self)
+
+    def https_open(self, req):
+        return self.do_open(
+            lambda host, **kw: VerifyingHTTPSConn(host, self.ca_bundle, **kw), req
+        )
+
+
+class VerifyingHTTPSConn(HTTPSConnection):
+    """Simple verifying connection: no auth, subclasses, timeouts, etc."""
+
+    def __init__(self, host, ca_bundle, **kw):
+        HTTPSConnection.__init__(self, host, **kw)
+        self.ca_bundle = ca_bundle
+
+    def connect(self):
+        sock = socket.create_connection(
+            (self.host, self.port), getattr(self, 'source_address', None)
+        )
+
+        # Handle the socket if a (proxy) tunnel is present
+        if hasattr(self, '_tunnel') and getattr(self, '_tunnel_host', None):
+            self.sock = sock
+            self._tunnel()
+            # http://bugs.python.org/issue7776: Python>=3.4.1 and >=2.7.7
+            # change self.host to mean the proxy server host when tunneling is
+            # being used. Adapt, since we are interested in the destination
+            # host for the match_hostname() comparison.
+            actual_host = self._tunnel_host
+        else:
+            actual_host = self.host
+
+        if hasattr(ssl, 'create_default_context'):
+            ctx = ssl.create_default_context(cafile=self.ca_bundle)
+            self.sock = ctx.wrap_socket(sock, server_hostname=actual_host)
+        else:
+            # This is for python < 2.7.9 and < 3.4?
+            self.sock = ssl.wrap_socket(
+                sock, cert_reqs=ssl.CERT_REQUIRED, ca_certs=self.ca_bundle
+            )
+        try:
+            match_hostname(self.sock.getpeercert(), actual_host)
+        except CertificateError:
+            self.sock.shutdown(socket.SHUT_RDWR)
+            self.sock.close()
+            raise
+
+
+def opener_for(ca_bundle=None):
+    """Get a urlopen() replacement that uses ca_bundle for verification"""
+    return urllib.request.build_opener(
+        VerifyingHTTPSHandler(ca_bundle or find_ca_bundle())
+    ).open
+
+
+# from jaraco.functools
+def once(func):
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        if not hasattr(func, 'always_returns'):
+            func.always_returns = func(*args, **kwargs)
+        return func.always_returns
+    return wrapper
+
+
+@once
+def get_win_certfile():
+    try:
+        import wincertstore
+    except ImportError:
+        return None
+
+    class CertFile(wincertstore.CertFile):
+        def __init__(self):
+            super(CertFile, self).__init__()
+            atexit.register(self.close)
+
+        def close(self):
+            try:
+                super(CertFile, self).close()
+            except OSError:
+                pass
+
+    _wincerts = CertFile()
+    _wincerts.addstore('CA')
+    _wincerts.addstore('ROOT')
+    return _wincerts.name
+
+
+def find_ca_bundle():
+    """Return an existing CA bundle path, or None"""
+    extant_cert_paths = filter(os.path.isfile, cert_paths)
+    return (
+        get_win_certfile()
+        or next(extant_cert_paths, None)
+        or _certifi_where()
+    )
+
+
+def _certifi_where():
+    try:
+        return __import__('certifi').where()
+    except (ImportError, ResolutionError, ExtractionError):
+        pass
diff --git a/venv/lib/python3.9/site-packages/setuptools/unicode_utils.py b/venv/lib/python3.9/site-packages/setuptools/unicode_utils.py
new file mode 100644
index 0000000..7c63efd
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/unicode_utils.py
@@ -0,0 +1,44 @@
+import unicodedata
+import sys
+
+from setuptools.extern import six
+
+
+# HFS Plus uses decomposed UTF-8
+def decompose(path):
+    if isinstance(path, six.text_type):
+        return unicodedata.normalize('NFD', path)
+    try:
+        path = path.decode('utf-8')
+        path = unicodedata.normalize('NFD', path)
+        path = path.encode('utf-8')
+    except UnicodeError:
+        pass  # Not UTF-8
+    return path
+
+
+def filesys_decode(path):
+    """
+    Ensure that the given path is decoded,
+    NONE when no expected encoding works
+    """
+
+    if isinstance(path, six.text_type):
+        return path
+
+    fs_enc = sys.getfilesystemencoding() or 'utf-8'
+    candidates = fs_enc, 'utf-8'
+
+    for enc in candidates:
+        try:
+            return path.decode(enc)
+        except UnicodeDecodeError:
+            continue
+
+
+def try_encode(string, enc):
+    "turn unicode encoding into a functional routine"
+    try:
+        return string.encode(enc)
+    except UnicodeEncodeError:
+        return None
diff --git a/venv/lib/python3.9/site-packages/setuptools/version.py b/venv/lib/python3.9/site-packages/setuptools/version.py
new file mode 100644
index 0000000..95e1869
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/version.py
@@ -0,0 +1,6 @@
+import pkg_resources
+
+try:
+    __version__ = pkg_resources.get_distribution('setuptools').version
+except Exception:
+    __version__ = 'unknown'
diff --git a/venv/lib/python3.9/site-packages/setuptools/wheel.py b/venv/lib/python3.9/site-packages/setuptools/wheel.py
new file mode 100644
index 0000000..025aaa8
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/wheel.py
@@ -0,0 +1,220 @@
+"""Wheels support."""
+
+from distutils.util import get_platform
+from distutils import log
+import email
+import itertools
+import os
+import posixpath
+import re
+import zipfile
+
+import pkg_resources
+import setuptools
+from pkg_resources import parse_version
+from setuptools.extern.packaging.tags import sys_tags
+from setuptools.extern.packaging.utils import canonicalize_name
+from setuptools.extern.six import PY3
+from setuptools.command.egg_info import write_requirements
+
+
+__metaclass__ = type
+
+
+WHEEL_NAME = re.compile(
+    r"""^(?P<project_name>.+?)-(?P<version>\d.*?)
+    ((-(?P<build>\d.*?))?-(?P<py_version>.+?)-(?P<abi>.+?)-(?P<platform>.+?)
+    )\.whl$""",
+    re.VERBOSE).match
+
+NAMESPACE_PACKAGE_INIT = '''\
+try:
+    __import__('pkg_resources').declare_namespace(__name__)
+except ImportError:
+    __path__ = __import__('pkgutil').extend_path(__path__, __name__)
+'''
+
+
+def unpack(src_dir, dst_dir):
+    '''Move everything under `src_dir` to `dst_dir`, and delete the former.'''
+    for dirpath, dirnames, filenames in os.walk(src_dir):
+        subdir = os.path.relpath(dirpath, src_dir)
+        for f in filenames:
+            src = os.path.join(dirpath, f)
+            dst = os.path.join(dst_dir, subdir, f)
+            os.renames(src, dst)
+        for n, d in reversed(list(enumerate(dirnames))):
+            src = os.path.join(dirpath, d)
+            dst = os.path.join(dst_dir, subdir, d)
+            if not os.path.exists(dst):
+                # Directory does not exist in destination,
+                # rename it and prune it from os.walk list.
+                os.renames(src, dst)
+                del dirnames[n]
+    # Cleanup.
+    for dirpath, dirnames, filenames in os.walk(src_dir, topdown=True):
+        assert not filenames
+        os.rmdir(dirpath)
+
+
+class Wheel:
+
+    def __init__(self, filename):
+        match = WHEEL_NAME(os.path.basename(filename))
+        if match is None:
+            raise ValueError('invalid wheel name: %r' % filename)
+        self.filename = filename
+        for k, v in match.groupdict().items():
+            setattr(self, k, v)
+
+    def tags(self):
+        '''List tags (py_version, abi, platform) supported by this wheel.'''
+        return itertools.product(
+            self.py_version.split('.'),
+            self.abi.split('.'),
+            self.platform.split('.'),
+        )
+
+    def is_compatible(self):
+        '''Is the wheel is compatible with the current platform?'''
+        supported_tags = set((t.interpreter, t.abi, t.platform) for t in sys_tags())
+        return next((True for t in self.tags() if t in supported_tags), False)
+
+    def egg_name(self):
+        return pkg_resources.Distribution(
+            project_name=self.project_name, version=self.version,
+            platform=(None if self.platform == 'any' else get_platform()),
+        ).egg_name() + '.egg'
+
+    def get_dist_info(self, zf):
+        # find the correct name of the .dist-info dir in the wheel file
+        for member in zf.namelist():
+            dirname = posixpath.dirname(member)
+            if (dirname.endswith('.dist-info') and
+                    canonicalize_name(dirname).startswith(
+                        canonicalize_name(self.project_name))):
+                return dirname
+        raise ValueError("unsupported wheel format. .dist-info not found")
+
+    def install_as_egg(self, destination_eggdir):
+        '''Install wheel as an egg directory.'''
+        with zipfile.ZipFile(self.filename) as zf:
+            self._install_as_egg(destination_eggdir, zf)
+
+    def _install_as_egg(self, destination_eggdir, zf):
+        dist_basename = '%s-%s' % (self.project_name, self.version)
+        dist_info = self.get_dist_info(zf)
+        dist_data = '%s.data' % dist_basename
+        egg_info = os.path.join(destination_eggdir, 'EGG-INFO')
+
+        self._convert_metadata(zf, destination_eggdir, dist_info, egg_info)
+        self._move_data_entries(destination_eggdir, dist_data)
+        self._fix_namespace_packages(egg_info, destination_eggdir)
+
+    @staticmethod
+    def _convert_metadata(zf, destination_eggdir, dist_info, egg_info):
+        def get_metadata(name):
+            with zf.open(posixpath.join(dist_info, name)) as fp:
+                value = fp.read().decode('utf-8') if PY3 else fp.read()
+                return email.parser.Parser().parsestr(value)
+
+        wheel_metadata = get_metadata('WHEEL')
+        # Check wheel format version is supported.
+        wheel_version = parse_version(wheel_metadata.get('Wheel-Version'))
+        wheel_v1 = (
+            parse_version('1.0') <= wheel_version < parse_version('2.0dev0')
+        )
+        if not wheel_v1:
+            raise ValueError(
+                'unsupported wheel format version: %s' % wheel_version)
+        # Extract to target directory.
+        os.mkdir(destination_eggdir)
+        zf.extractall(destination_eggdir)
+        # Convert metadata.
+        dist_info = os.path.join(destination_eggdir, dist_info)
+        dist = pkg_resources.Distribution.from_location(
+            destination_eggdir, dist_info,
+            metadata=pkg_resources.PathMetadata(destination_eggdir, dist_info),
+        )
+
+        # Note: Evaluate and strip markers now,
+        # as it's difficult to convert back from the syntax:
+        # foobar; "linux" in sys_platform and extra == 'test'
+        def raw_req(req):
+            req.marker = None
+            return str(req)
+        install_requires = list(sorted(map(raw_req, dist.requires())))
+        extras_require = {
+            extra: sorted(
+                req
+                for req in map(raw_req, dist.requires((extra,)))
+                if req not in install_requires
+            )
+            for extra in dist.extras
+        }
+        os.rename(dist_info, egg_info)
+        os.rename(
+            os.path.join(egg_info, 'METADATA'),
+            os.path.join(egg_info, 'PKG-INFO'),
+        )
+        setup_dist = setuptools.Distribution(
+            attrs=dict(
+                install_requires=install_requires,
+                extras_require=extras_require,
+            ),
+        )
+        # Temporarily disable info traces.
+        log_threshold = log._global_log.threshold
+        log.set_threshold(log.WARN)
+        try:
+            write_requirements(
+                setup_dist.get_command_obj('egg_info'),
+                None,
+                os.path.join(egg_info, 'requires.txt'),
+            )
+        finally:
+            log.set_threshold(log_threshold)
+
+    @staticmethod
+    def _move_data_entries(destination_eggdir, dist_data):
+        """Move data entries to their correct location."""
+        dist_data = os.path.join(destination_eggdir, dist_data)
+        dist_data_scripts = os.path.join(dist_data, 'scripts')
+        if os.path.exists(dist_data_scripts):
+            egg_info_scripts = os.path.join(
+                destination_eggdir, 'EGG-INFO', 'scripts')
+            os.mkdir(egg_info_scripts)
+            for entry in os.listdir(dist_data_scripts):
+                # Remove bytecode, as it's not properly handled
+                # during easy_install scripts install phase.
+                if entry.endswith('.pyc'):
+                    os.unlink(os.path.join(dist_data_scripts, entry))
+                else:
+                    os.rename(
+                        os.path.join(dist_data_scripts, entry),
+                        os.path.join(egg_info_scripts, entry),
+                    )
+            os.rmdir(dist_data_scripts)
+        for subdir in filter(os.path.exists, (
+            os.path.join(dist_data, d)
+            for d in ('data', 'headers', 'purelib', 'platlib')
+        )):
+            unpack(subdir, destination_eggdir)
+        if os.path.exists(dist_data):
+            os.rmdir(dist_data)
+
+    @staticmethod
+    def _fix_namespace_packages(egg_info, destination_eggdir):
+        namespace_packages = os.path.join(
+            egg_info, 'namespace_packages.txt')
+        if os.path.exists(namespace_packages):
+            with open(namespace_packages) as fp:
+                namespace_packages = fp.read().split()
+            for mod in namespace_packages:
+                mod_dir = os.path.join(destination_eggdir, *mod.split('.'))
+                mod_init = os.path.join(mod_dir, '__init__.py')
+                if not os.path.exists(mod_dir):
+                    os.mkdir(mod_dir)
+                if not os.path.exists(mod_init):
+                    with open(mod_init, 'w') as fp:
+                        fp.write(NAMESPACE_PACKAGE_INIT)
diff --git a/venv/lib/python3.9/site-packages/setuptools/windows_support.py b/venv/lib/python3.9/site-packages/setuptools/windows_support.py
new file mode 100644
index 0000000..cb977cf
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/setuptools/windows_support.py
@@ -0,0 +1,29 @@
+import platform
+import ctypes
+
+
+def windows_only(func):
+    if platform.system() != 'Windows':
+        return lambda *args, **kwargs: None
+    return func
+
+
+@windows_only
+def hide_file(path):
+    """
+    Set the hidden attribute on a file or directory.
+
+    From http://stackoverflow.com/questions/19622133/
+
+    `path` must be text.
+    """
+    __import__('ctypes.wintypes')
+    SetFileAttributes = ctypes.windll.kernel32.SetFileAttributesW
+    SetFileAttributes.argtypes = ctypes.wintypes.LPWSTR, ctypes.wintypes.DWORD
+    SetFileAttributes.restype = ctypes.wintypes.BOOL
+
+    FILE_ATTRIBUTE_HIDDEN = 0x02
+
+    ret = SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN)
+    if not ret:
+        raise ctypes.WinError()
diff --git a/venv/lib/python3.9/site-packages/tests/__init__.py b/venv/lib/python3.9/site-packages/tests/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/tests/__init__.py
diff --git a/venv/lib/python3.9/site-packages/tests/__pycache__/__init__.cpython-39.pyc b/venv/lib/python3.9/site-packages/tests/__pycache__/__init__.cpython-39.pyc
new file mode 100644
index 0000000..f054d8d
--- /dev/null
+++ b/venv/lib/python3.9/site-packages/tests/__pycache__/__init__.cpython-39.pyc
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diff --git a/venv/lib64 b/venv/lib64
new file mode 120000
index 0000000..7951405
--- /dev/null
+++ b/venv/lib64
@@ -0,0 +1 @@
+lib
\ No newline at end of file
diff --git a/venv/pyvenv.cfg b/venv/pyvenv.cfg
new file mode 100644
index 0000000..c4ad679
--- /dev/null
+++ b/venv/pyvenv.cfg
@@ -0,0 +1,3 @@
+home = /opt/OpenICEDA/OICvenv/bin
+include-system-site-packages = false
+version = 3.9.2
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diff --git a/venv/share/python-wheels/wheel-0.34.2-py2.py3-none-any.whl b/venv/share/python-wheels/wheel-0.34.2-py2.py3-none-any.whl
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diff --git a/verilog/rtl/user_defines.v b/verilog/rtl/user_defines.v
new file mode 100644
index 0000000..9d07b96
--- /dev/null
+++ b/verilog/rtl/user_defines.v
@@ -0,0 +1,92 @@
+// SPDX-FileCopyrightText: 2022 Efabless Corporation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// SPDX-License-Identifier: Apache-2.0
+
+`default_nettype none
+
+`ifndef __USER_DEFINES_H
+// User GPIO initial configuration parameters
+`define __USER_DEFINES_H
+
+// deliberately erroneous placeholder value; user required to config GPIO's to other
+`define GPIO_MODE_INVALID                  13'hXXXX
+
+// Authoritive source of these MODE defs is: caravel/verilog/rtl/user_defines.v
+// Useful GPIO mode values.  These match the names used in defs.h.
+//
+`define GPIO_MODE_MGMT_STD_INPUT_NOPULL    13'h0403
+`define GPIO_MODE_MGMT_STD_INPUT_PULLDOWN  13'h0c01
+`define GPIO_MODE_MGMT_STD_INPUT_PULLUP    13'h0801
+`define GPIO_MODE_MGMT_STD_OUTPUT          13'h1809
+`define GPIO_MODE_MGMT_STD_BIDIRECTIONAL   13'h1801
+`define GPIO_MODE_MGMT_STD_ANALOG          13'h000b
+
+`define GPIO_MODE_USER_STD_INPUT_NOPULL    13'h0402
+`define GPIO_MODE_USER_STD_INPUT_PULLDOWN  13'h0c00
+`define GPIO_MODE_USER_STD_INPUT_PULLUP    13'h0800
+`define GPIO_MODE_USER_STD_OUTPUT          13'h1808
+`define GPIO_MODE_USER_STD_BIDIRECTIONAL   13'h1800
+`define GPIO_MODE_USER_STD_OUT_MONITORED   13'h1802
+`define GPIO_MODE_USER_STD_ANALOG          13'h000a
+
+// The power-on configuration for GPIO 0 to 4 is fixed and cannot be
+// modified (allowing the SPI and debug to always be accessible unless
+// overridden by a flash program).
+
+// The values below can be any of the standard types defined above,
+// or they can be any 13-bit value if the user wants a non-standard
+// startup state for the GPIO.  By default, every GPIO from 5 to 37
+// is set to power up as an input controlled by the management SoC.
+// Users may want to redefine these so that the user project powers
+// up in a state that can be used immediately without depending on
+// the management SoC to run a startup program to configure the GPIOs.
+
+`define USER_CONFIG_GPIO_5_INIT  `GPIO_MODE_USER_STD_INPUT_PULLDOWN 
+`define USER_CONFIG_GPIO_6_INIT  `GPIO_MODE_USER_STD_INPUT_PULLDOWN 
+`define USER_CONFIG_GPIO_7_INIT  `GPIO_MODE_USER_STD_ANALOG
+`define USER_CONFIG_GPIO_8_INIT  `GPIO_MODE_USER_STD_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_9_INIT  `GPIO_MODE_USER_STD_ANALOG
+`define USER_CONFIG_GPIO_10_INIT `GPIO_MODE_USER_STD_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_11_INIT `GPIO_MODE_USER_STD_ANALOG
+`define USER_CONFIG_GPIO_12_INIT `GPIO_MODE_USER_STD_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_13_INIT `GPIO_MODE_USER_STD_ANALOG
+
+// Configurations of GPIO 14 to 24 are used on caravel but not caravan.
+`define USER_CONFIG_GPIO_14_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_15_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_16_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_17_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_18_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_19_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_20_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_21_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_22_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_23_INIT `GPIO_MODE_INVALID
+`define USER_CONFIG_GPIO_24_INIT `GPIO_MODE_INVALID
+
+`define USER_CONFIG_GPIO_25_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_26_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_27_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_28_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_29_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_30_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_31_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_32_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_33_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_34_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_35_INIT `GPIO_MODE_USER_ANALOG
+`define USER_CONFIG_GPIO_36_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+`define USER_CONFIG_GPIO_37_INIT `GPIO_MODE_USER_INPUT_PULLDOWN
+
+`endif // __USER_DEFINES_H
diff --git a/xschem/user_analog_project_wrapper.sch b/xschem/user_analog_project_wrapper.sch
index aa7f8a9..2266f49 100644
--- a/xschem/user_analog_project_wrapper.sch
+++ b/xschem/user_analog_project_wrapper.sch
@@ -1,4 +1,5 @@
-v {xschem version=3.0.0 file_version=1.2 }
+v {xschem version=3.1.0 file_version=1.2
+}
 G {}
 K {}
 V {}
@@ -860,9 +861,9 @@
 C {devices/lab_pin.sym} 4050 60 0 0 {name=l15 sig_type=std_logic lab=VSSD2}
 C {devices/lab_pin.sym} 4530 60 0 0 {name=l13 sig_type=std_logic lab=VSSD2}
 C {devices/lab_pin.sym} 5030 60 0 0 {name=l14 sig_type=std_logic lab=VSSD2}
-C {devices/lab_pin.sym} 4340 330 2 0 {name=l16 sig_type=std_logic lab=la_data_in[16:9]}
-C {devices/lab_pin.sym} 4840 330 2 0 {name=l17 sig_type=std_logic lab=la_data_in[24:17]}
-C {devices/lab_pin.sym} 5360 330 2 0 {name=l18 sig_type=std_logic lab=la_data_in[32:25]}
+C {devices/lab_pin.sym} 4340 330 2 0 {name=l16 sig_type=std_logic lab=la_data_out[16:9]}
+C {devices/lab_pin.sym} 4840 330 2 0 {name=l17 sig_type=std_logic lab=la_data_out[24:17]}
+C {devices/lab_pin.sym} 5360 330 2 0 {name=l18 sig_type=std_logic lab=la_data_out[32:25]}
 C {devices/lab_pin.sym} 3960 -910 0 0 {name=l22 sig_type=std_logic lab=gpio_analog[8]}
 C {devices/lab_pin.sym} 3960 -570 0 0 {name=l19 sig_type=std_logic lab=gpio_analog[8]}
 C {devices/lab_pin.sym} 3960 -240 0 0 {name=l20 sig_type=std_logic lab=gpio_analog[8]}